Abstract

There is provided a circuit breaker handle lock device capable of enhancing work safety. By inserting slide pins through a first slotted hole of a locking plate and a second slotted hole of a lock plate and connecting the slide pins to a slide part, a handle catch and the lock plate are arranged to be slidable in the movement direction of a knob part with respect to the locking plate. A second lock hole of the slide part and a first lock hole of the locking plate communicate with each other at the OFF position of the knob part, and the locking plate is blocked with the second lock hole at the ON position of the knob part. The lock plate moves in the movement direction of the knob part while blocking the first slotted hole of the locking plate.

IPC Classes  ?

• H01H 71/52 - Manual reset mechanisms actuated by lever

Abstract

A handle lock device for a circuit breaker, the handle lock device including: a lock base attached to the upper surface of the case; a first lock hole division portion formed at a part of the lock base; a handle lock plate rotatably connected to the lock base; and a second lock hole division portion formed at a part of the handle lock plate, wherein when the handle lock plate rotates to a position that restrains the knob portion in the OFF position, the second lock hole division portion moves to a position continuous to the first lock hole division portion to form a lock hole, and a padlock is applied to the lock hole to cause the handle lock plate to restrain the knob portion in the OFF position.

IPC Classes  ?

• H01H 9/20 - Interlocking, locking, or latching mechanisms
• H01H 23/12 - Movable partsContacts mounted thereon

Abstract

A circuit breaker has at least two handle lock screw engagement portions to which a handle lock device is attached formed on a case at positions different from a position of an attachment screw for integrating a case including a plurality of divided bodies. The handle lock device has at least two attaching screws disposed, the attaching screws engaging with the handle lock screw engagement portions of the circuit breaker and attaching the handle lock device at a regular position on the circuit breaker. The handle lock device has a handle locking portion disposed, the handle locking portion restricting the knob portion from moving to an ON position even when the attaching screws are incorrectly attached to the handle lock screw engagement portions.

IPC Classes  ?

• H01H 9/20 - Interlocking, locking, or latching mechanisms
• H01H 23/12 - Movable partsContacts mounted thereon

Abstract

Provided is a structure for coupling an electromagnetic contactor (1) that has an opening portion (9) on an arc extinguishing cover (4) and an engaging portion (23) provided on a contact support (19) of a contact mechanism (10) so as to protrude or retract into or from the opening portion by on/off driving of an electromagnetic unit (12) and a head-on unit (25) that is engaged with the engaging portion by sliding and inserting a hook portion (32) into the opening portion. This structure comprises rotation preventing portions (5a), (5b), (34a), and (34b) that prevent the head-on unit from rotating when the head-on unit is slid and coupled to the electromagnetic contactor.

IPC Classes  ?

• H01H 50/04 - Mounting complete relay or separate parts of relay on a base or inside a case
• H01H 50/20 - Movable parts of magnetic circuits, e.g. armature movable inside coil and substantially lengthwise with respect to axis thereofMovable parts of magnetic circuits, e.g. armature movable coaxially with respect to coil
• H01H 50/54 - Contact arrangements

Abstract

In the present invention, a trip operation of a reversal mechanism (24) is performed by a differential lever (23) being pivoted by being pushed against a push shifter (22a) from the outside in the radial direction with a position at which the differential lever engages with a pull shifter (22b) as the pivot center, and a compensation bimetal contact surface (74) that is provided to the differential lever displacing a compensation bimetal (31). In addition, there is provided a compensation bimetal displacement amplifying means that amplifies the displacement of the compensation bimetal by, in an overloaded state in which an overcurrent flows, stopping of the displacement of the pull shifter and a subsequent displacement of the push shifter, whereby the differential lever is pivoted.

IPC Classes  ?

• H01H 61/00 - Electrothermal relays
• H01H 61/01 - Electrothermal relays Details

Abstract

This electromagnetic contactor comprises: a fixed electromagnet (15); an operating coil (17); a movable electromagnet (16); a contact support section (50) that is fixed to the movable electromagnet, is drawn, together with the movable electromagnet, by the fixed electromagnet to a first side in a first direction when power is supplied to the operating coil, that moves, together with the movable electromagnet, to a second side in the first direction that is opposite the first side, away from the fixed electromagnet when the power to the operating coil is interrupted, and that has a window section (51h) that penetrates in a second direction that intersects the first direction; a movable contact (51c) that is installed in the window section; a contact spring (51s) that is compressed in the first direction, an end of the contact spring on the first side being fixed to an end of the window section on the first side, and an end of the contact spring on the second side pressing on the movable contact; and a spring fitting (51r) between the movable contact and the contact spring. The contact support section has recessed sections (51g, 51i) in the window section that are recessed in a third direction that intersects the first direction and the second direction.

IPC Classes  ?

• H01H 50/54 - Contact arrangements

Abstract

The present invention includes: a rail (2) having an upper rail engagement portion (2b) and a lower rail engagement portion (2c) at both ends in a width direction; an electric device (1) in which an upper device engagement portion (6) and a lower device engagement portion (7) that are in the shape of a hook and face each other are provided at the top and bottom of a housing bottom surface (3a), and the upper rail engagement portion is fitted into the upper device engagement portion to be engaged therewith and the lower rail engagement portion is fitted into the lower device engagement portion to be engaged therewith; spring portions (10), (11) that are arranged in the vicinity of the upper device engagement portion of the housing bottom surface and apply a spring biasing force to the upper rail engagement portion that comes into engagement with the upper device engagement portion; and an engagement retaining means (8) for retaining the engaged state between the lower rail engagement portion and the lower device engagement portion when an impact force greater than the spring biasing force is applied to the electric device.

IPC Classes  ?

• H05K 7/12 - Resilient or clamping means for holding component to structure
• H01H 45/04 - Mounting complete relay or separate parts of relay on a base or inside a case
• H02B 1/052 - Mounting on rails

Abstract

This latch-type electromagnetic contactor (11) comprises a movable core (33), a fixed core (32), and a core support (42). The movable core (33) can be displaced in the depth direction. The fixed core (32) faces the movable core (33) on the deep side in the depth direction and has a through-hole (41) formed to pass therethrough in the width direction thereof. The core support (42) has a plate-like shape and is inserted into the through-hole (41) to be supported on both end sides thereof. Protruding parts (81) that protrude in the depth direction are formed on the core support (42) in regions inserted into the through-hole (41).

IPC Classes  ?

• H01H 50/16 - Magnetic circuit arrangements
• H01H 50/32 - Latching movable parts mechanically

Abstract

In a spool (22), a coil (32) is wound around a cylindrical portion (31) extending in a depth direction and flanges (33) are formed on both sides of the cylindrical portion (31) in the depth direction. An inner yoke (27) is formed in a flat-plate shape extending in parallel to the depth direction and edge portions (61) on both sides in the depth direction are fitted to the flanges (33). In the flanges (33), claw portions (41) and claw portions (51) for holding the fitted inner yoke (27) are formed.

IPC Classes  ?

• H01F 7/16 - Rectilinearly-movable armatures
• H01H 50/44 - Magnetic coils or windings

Abstract

In this electromagnetic contactor (11), a main contact support (14) advances and retreats along the depth direction. In this auxiliary contact unit (21), an auxiliary contact support (24) is coupled to the main contact support (14) from the front side in the depth direction in the electromagnetic contactor (11). An engagement projection (17) is formed on a base end face (16) in the main contact support (14). An engagement recess (27) that is fitted and coupled to the engagement projection (17) is formed in the auxiliary contact support (24). The engagement projection (17) is disposed farther back than the front surface in the depth direction of the electromagnetic contactor (11).

IPC Classes  ?

• H01H 50/04 - Mounting complete relay or separate parts of relay on a base or inside a case
• H01H 50/54 - Contact arrangements
• F16B 5/10 - Joining sheets or plates to one another or to strips or bars parallel to them by means of bayonet connections

Abstract

There is provided an electric device configured to allow easy replacement of one or more electric components housed in a first frame and a second frame and suppressing relative displacement of the first frame and the second frame to enhance reliability. A bulging wall member of a body frame is formed by a bulging wall member of the first frame and a bulging wall member of the second frame, both members being contiguous in a Z-direction. A relative displacement suppression mechanism configured to suppress relative displacement of an X-direction and a Y-direction is provided in an area in which the bulging wall member and the bulging wall member are contiguous.

IPC Classes  ?

• H01H 50/02 - BasesCasingsCovers
• H01H 50/54 - Contact arrangements
• H01H 50/44 - Magnetic coils or windings

Abstract

A contact inversion mechanism for switching contacts is provided with a movable plate (23) which is disposed in an inversion mechanism support (20) with one end being used as a supporting point and the other end side being swingable, and which is provided with a movable contact (30a) of the contacts on one surface. The inversion mechanism support is provided with V-shaped support grooves (36a), (37a) which are formed in a pair of first movable plate holding arms (36), (37) extending parallel to each other and on which one end of the movable plate (23) is mounted as the supporting point, and a second movable plate holding arm (38) which extends from the first movable plate holding arm, against which the other end side of the movable plate leans, and which supports the movable plate in an inclined state with an inclination amount kept constant.

IPC Classes  ?

• H01H 61/01 - Electrothermal relays Details

Abstract

An electromagnetic contactor (11) comprises an upper section frame (13), a fixed contact element (21), a movable contact element (22), and a grid (51). The grid (51) is a metal plate that is formed, in the shape of the character コ when viewed from a depth direction, from a pair of side plates (52) adjacent to partitioning walls (61) of the upper section frame (13) and facing one another, and a middle plate (53) provided between base ends of the side plates (52), and a contact point section (25) is positioned inside thereof. Formed in the upper section frame (13) is a protection wall (62) that covers, within the inner peripheral surface of the grid (51), tip-end side end sections (64) of the side plates (52).

IPC Classes  ?

• H01H 9/36 - Metal parts
• H01H 50/00 - Details of electromagnetic relays
• H01H 50/54 - Contact arrangements

Abstract

A contact support (12) is provided toward the front side in a predetermined depth direction, and has a groove (22) formed therein. A movable plunger (14) is provided toward the back side in the depth direction, and is driven by an electromagnetic part (13). A joint spring (16) is a leaf spring, the center of the joint spring is fixed to the movable plunger (14), and the longitudinal-direction tip end side the joint spring is inserted into the groove (22) along the short direction. A protrusion (36) is formed in the groove (22), a gap (42) serving as a recess is formed at the tip end side of the joint spring (16), and when the tip end side of the joint spring (16) is inserted into the groove (22), the gap (42) and the protrusion (36) fit to each other.

IPC Classes  ?

• H01H 50/54 - Contact arrangements
• H01H 50/20 - Movable parts of magnetic circuits, e.g. armature movable inside coil and substantially lengthwise with respect to axis thereofMovable parts of magnetic circuits, e.g. armature movable coaxially with respect to coil

Abstract

The present invention is a thermal relay (1) that is provided, within a case, with: heat elements (8a-8c) that correspond to respective phases of a main circuit; a shifter (9) that engages in a slidable manner with an operating section (16b) of each heat element; and a contact point inversion mechanism (14) that can switch contact points (13) in coordination with sliding of the shifter. The heat elements are each provided with: a long plate-shaped bimetal (16) that is not a conduction path of the main circuit, with the operating section that engages with the shifter being provided at a longitudinal end thereof; and a heater (17) that is a conduction path of the main circuit and that comprises a first heater section (17c) that extends in the longitudinal direction while being in surface contact with a side surface of the bimetal, the first heater section transmitting heat to the bimetal by conducting an overload current.

IPC Classes  ?

• H01H 61/01 - Electrothermal relays Details
• H01H 61/013 - Heating arrangements for operating relays

Abstract

This electromagnetic contactor comprises: a case (3) that houses a contact portion (6) having a movable contact (15a), (15b) and a fixed contact (13a), (13b) in an arc-extinguishing chamber (12); and an arc-extinguishing cover (7) that covers the arc-extinguishing chamber and is attached to the case (3). In the arc-extinguishing cover, a first engagement portion (27), (32) and a second engagement portion (26), (31) are formed to be separated from each other in the direction of attachment to the case. In the case, a third engagement portion (36) and a fourth engagement portion (35) are formed. The arc-extinguishing cover is attached to the case in a first engagement state in which the first engagement portion and the third engagement portion engage with each other. Further, the arc-extinguishing cover is attached to the case with a gap provided therebetween in a second engagement state in which the second engagement portion and the fourth engagement portion engage with each other.

IPC Classes  ?

• H01H 50/02 - BasesCasingsCovers
• H01H 50/00 - Details of electromagnetic relays

Abstract

An electromagnetic contactor includes a stationary contact element including a stationary contact, a movable contact element including a movable contact configured to be able to contact and separate from the stationary contact, an arc-extinguishing chamber that contains a contact portion that includes the stationary contact and the movable contact, and an arc runner provided in the arc-extinguishing chamber. The arc-extinguishing chamber includes an insulating wall portion that is situated beside the stationary contact element in a first direction that is a width direction of the stationary contact element. The arc runner is situated beside the contact portion in a second direction that is perpendicular to the first direction.

IPC Classes  ?

• H01H 33/18 - Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
• H01H 50/54 - Contact arrangements

Abstract

A case has an engagement hole formed in a side surface thereof in the width direction, a cover has a projecting piece formed thereon, the projecting piece projecting toward the case side, and a tip portion of the projecting piece is fitted into the engagement hole from the inside. A reset bar has a recessed portion formed in a preset range extending in the depth direction and the circumferential direction within the outer peripheral surface of the reset bar and, when positioned at either an initial position or an automatic reset position, prevents the tip portion from being pushed inside by having the outer peripheral surface opposed to the back side of the projecting piece. In addition, when positioned at a manual reset position, the reset bar allows the tip portion to be pushed inside by having the recessed portion opposed to the back side of the projecting piece.

IPC Classes  ?

• H01H 37/54 - Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
• H01H 37/70 - Resetting means
• H01H 37/00 - Thermally-actuated switches
• H01H 37/04 - BasesHousingsMountings

Abstract

A current sensor wound and mounted in a coil shape with at least one winding around a measurement conductor where a primary current flows, the current sensor including: an insulated electrical wire including a core wire having a flexible rod-shaped body and an insulating covering portion covering an outer periphery of the core wire; and a coil thin wire having one end electrically connected to one end side of the core wire, and functioning as a secondary coil by being spirally wound around an outer periphery of the insulating covering portion, wherein an other end of the core wire and an other end of the coil thin wire, which are not electrically connected, are used as output terminals.

IPC Classes  ?

• G01R 19/00 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof
• G01R 15/18 - Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
• H01F 27/32 - Insulating of coils, windings, or parts thereof

Abstract

A non-magnetic plate having a thin plate shape and being attachable to and detachable from a shaft of an electromagnet included in an electromagnetic contactor, the non-magnetic plate includes: a hole having a circular shape provided at a center of the non-magnetic plate, into which the shaft is to be fitted; and a cutout provided in connection with a front end portion of the non-magnetic plate and the hole, for having the shaft inserted into the hole through from the front end portion side.

IPC Classes  ?

• H01H 50/36 - Stationary parts of magnetic circuit, e.g. yoke
• H01H 50/54 - Contact arrangements
• H01H 49/00 - Apparatus or processes specially adapted to the manufacture of relays or parts thereof

Abstract

A plunger-type electromagnet unit is formed by integrally incorporating a contact support (28) specifically for plunger-type electromagnets into an upper frame (11B), or a leg-type electromagnet unit is formed by integrally incorporating a contact support (55) specifically for leg-type electromagnets into the upper frame. Next, a connecting spring (18), (76) of either a plunger-type electromagnet (12) or a leg-type electromagnet (60) is inserted by sliding into an opening of a connecting insertion part (32a), (32b) or (75a), (75b) of either the plunger-type electromagnet unit or the leg-type electromagnet unit. A housing is then formed by engaging an upper edge part of a lower frame (11A) with a lower edge part of the upper frame.

IPC Classes  ?

• H01H 50/02 - BasesCasingsCovers
• H01H 49/00 - Apparatus or processes specially adapted to the manufacture of relays or parts thereof
• H01H 50/04 - Mounting complete relay or separate parts of relay on a base or inside a case

Abstract

A hermetically sealed electromagnetic contactor includes a main contact unit (21) configured to open and close an electrical path of a main circuit by moving along a predetermined opening/closing direction, an electromagnet unit (23) configured to switch opening/closing of the main contact unit (21), a container body (12) made of resin inside which the main contact unit (21) and the electromagnet unit (23) are arranged, an auxiliary contact unit (22) disposed outside the container body (12) on one side in the opening/closing direction of the main contact unit (21) and configured to open and close an electrical path of an auxiliary circuit by moving along the opening/closing direction in conjunction with the main contact unit (21), and an auxiliary contact housing portion (13) made of resin inside which the auxiliary contact unit (22) is arranged, the auxiliary contact housing portion (13) communicating with the inside of the container body (12), in which the insides of the container body (12) and the auxiliary contact housing portion (13) are filled with insulating gas.

IPC Classes  ?

• H01H 50/02 - BasesCasingsCovers
• H01H 50/54 - Contact arrangements
• H01H 50/44 - Magnetic coils or windings

Abstract

A hermetically sealed electromagnetic contactor includes a pair of fixed contact pieces having fixed contacts, a movable contact piece having a pair of movable contacts and capable of coming into contact with and being separated from the fixed contacts of the pair of fixed contact pieces, an electromagnet unit configured to drive the movable contact piece, a hermetically sealed container configured to house the pair of fixed contact pieces, the movable contact piece, and the electromagnet unit in the same space in a hermetically sealed manner and being filled with arc-extinguishing gas, and two pairs of arc-extinguishing permanent magnets arranged inside the hermetically sealed container and configured to stretch arcs generated between the fixed contacts of the pair of fixed contact pieces and the pair of movable contacts of the movable contact piece.

IPC Classes  ?

• H01H 50/38 - Part of main magnetic circuit shaped to suppress arcing between the contacts of the relay
• H01H 50/02 - BasesCasingsCovers

Abstract

A gas filling structure includes a through-hole (91) formed in a hermetically sealed container (11) made of resin to fill the hermetically sealed container (11) with gas and a screw (92) fastened to the through-hole (91) to seal the through-hole (91).

IPC Classes  ?

• H01H 50/54 - Contact arrangements
• H01H 1/20 - Bridging contacts
• H01H 9/44 - Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
• H01H 50/02 - BasesCasingsCovers

Abstract

A hermetically sealed electromagnetic contactor including: a pair of fixed contact pieces having fixed contacts; a movable contact piece having a pair of movable contacts capable of coming into contact with and being separated from the fixed contacts of the pair of fixed contact pieces; an electromagnet unit configured to drive the movable contact piece; and a hermetically sealed container configured to house the pair of fixed contact pieces and the movable contact piece in a hermetically sealed manner.

IPC Classes  ?

• H01H 50/02 - BasesCasingsCovers
• H01H 50/18 - Movable parts of magnetic circuits, e.g. armature
• H01H 50/54 - Contact arrangements
• H01H 50/14 - Terminal arrangements

Abstract

A hermetically sealed electromagnetic contactor including: a main contact unit including a pair of main fixed contact pieces, each of the main fixed contact pieces having a main fixed contact at one end and a terminal portion to be connected to a main circuit at the other end, and a main movable contact piece having a pair of main movable contacts configured to come into contact with and be separated from the main fixed contacts and configured to open and close an electrical path of the main circuit; a contact support configured to support the main movable contact piece; an electromagnet unit configured to switch opening/closing of the main contact unit via the contact support; and a hermetically sealed container made of resin on an inside of which the main contact unit and the electromagnet unit are arranged, the hermetically sealed container having the inside filled with insulating gas.

IPC Classes  ?

• H01H 1/66 - Contacts sealed in an evacuated or gas-filled envelope, e.g. magnetic dry-reed contacts
• H01H 50/02 - BasesCasingsCovers
• H01H 50/56 - Contact spring sets
• H01H 50/44 - Magnetic coils or windings

Abstract

This electromagnetic contactor is provided with: a contact support unit which is fixed to a movable electromagnet, which moves towards a first side and a second side in a first direction, which is provided with a first contact element and a second contact element, and which has a first window and a second window that pass in a second direction intersecting the first direction; a first movable contact which is arranged in the first window; a first fixed contact and which is provided with a third plate and a fourth plate which is electrically connected to the third plate and which is provided on the first side with respect to the third plate; a second fixed contact which is provided with a fifth plate and a sixth plate which is electrically connected to the fifth plate and which is provided on the first side with respect to the fifth plate; the aforementioned first fixed contact and the aforementioned second fixed contact which contact and separate from the first movable contact; a second movable contact which is arranged in the second window; and a third fixed contact and a fourth fixed contact which contact and separate from second movable contact.

IPC Classes  ?

• H01H 50/16 - Magnetic circuit arrangements
• H01H 50/54 - Contact arrangements

Abstract

Provided is a structure for attaching an electric device to a rail, the structure enabling elimination of tools when detaching the electric device from the rail. This structure for attaching an electric device to a rail is provided with: first engagement parts (11a), (11b) that engage with a first rail portion (2a) of the rail (2) on one side in the width direction; second engagement parts (12a), (12b) that engage with a second rail portion (2b) of the rail (2) on the other side in the width direction; a spring member (20) disposed at the front side of the first engagement parts (11a), (11b); and a slider (30) that is disposed in a manner as to be slidable back and forth on the bottom surface of a slider housing recess (14) and that is biased backward by the biasing force of the spring member (20). Upon attachment of an electric device (1) to the rail (2), the slider (30) comes into contact with the first rail portion (2a) so as to enable the biasing force of the spring member (20) to be applied to the first rail portion (2a) and to cause the second engagement parts (12a), (12b) to be in a state of pressing the second rail portion (2b).

IPC Classes  ?

• H05K 7/12 - Resilient or clamping means for holding component to structure
• H01H 9/02 - Bases, casings, or covers
• H05K 5/02 - Casings, cabinets or drawers for electric apparatus Details

Abstract

In the present invention, an inner wall (21) is formed on one vertical-direction side of an upper frame (13), and an outer wall (31) is formed on one vertical-direction side on a lower frame (12). A recess (23) that is bowed downward in the vertical direction is formed on an outer peripheral surface (22) of the inner wall (21), and a projection (33) that protrudes upward in the vertical direction is formed on an inner peripheral surface (32) of the outer wall (31). Fitting the recess (23) and the projection (33) together causes engaging parts (14) to engage the lower frame (12) and the upper frame (13). A threaded part (16) is formed on the other vertical-direction side, and the lower frame (12) and the upper frame (13), once engaged with the engaging parts (14), are fastened to each other by a single fastening screw (15).

IPC Classes  ?

• H01H 50/02 - BasesCasingsCovers
• H01H 9/02 - Bases, casings, or covers

Abstract

The present invention comprises: first and second fixed contacts (11, 12) having first and second fixed contact points (11a, 12a); a movable contact (13) having first and second movable contact points (13a, 13b) provided at both ends in the longitudinal direction; an insulation holder (40) storing the first and second fixed contacts and the movable contact; and a pair of arc-extinguishing permanent magnets (47, 49) that extend arcs generated between the first fixed contact point and the first movable contact point and between the second fixed contact point and the second movable contact point to arc-extinguishing spaces (S1, S2) provided in a storage case (6). An inner wall of a storage case (4) and coupling members (44a, 44b) provided at the insulation holder form communication spaces (56a, 56b) communicating the first and second arc-extinguishing spaces with a space in which an electromagnet unit (3) is stored.

IPC Classes  ?

• H01H 50/00 - Details of electromagnetic relays
• H01H 50/38 - Part of main magnetic circuit shaped to suppress arcing between the contacts of the relay

Abstract

A diagnostic device (10) according to the present invention comprises: current detection units (14r, 14s, 14t) that measure current values of currents flowing in a circuit breaker; and a diagnostic unit (11) that diagnoses the cause of a break when the circuit breaker shuts off from the current values measured by the current detection units (14r, 14s, 14t), the diagnostic unit (11) diagnosing the cause of the break on the basis of the current values immediately before the circuit breaker shut off.

IPC Classes  ?

• H01H 83/02 - Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents

Abstract

This auxiliary contact unit includes a case and a case that are divided from each other in the width direction. The case includes a side wall portion and a partition wall portion protruding from a wall surface of the side wall portion toward the case. The case includes a side wall portion having a wall surface with which a tip end of the partition wall portion comes into contact when the case is assembled to the case. A space surrounded by the side wall portion, the partition wall portion, and the side wall portion serves as a contact housing portion. The side wall portion includes a pass-by wall portion protruding from a wall surface toward the side wall portion along the partition wall portion.

IPC Classes  ?

• H01H 50/54 - Contact arrangements
• H01H 50/02 - BasesCasingsCovers

Abstract

This electromagnetic contactor comprises: a fixed contact maker having a fixed contact; a movable contact maker having a movable contact capable of coming into contact with and separating from the fixed contact; an arc-extinguishing chamber that stores a contact part comprising the fixed contact and the movable contact; and an arc runner disposed within the arc-extinguishing chamber. The arc-extinguishing chamber has an insulating wall part on the side in a first direction that is the width direction of the fixed contact maker, and the arc runner is provided on the side in a second direction orthogonal to the first direction of the contact part.

IPC Classes  ?

• H01H 9/46 - Means for extinguishing or preventing arc between current-carrying parts using arcing horns
• H01H 50/00 - Details of electromagnetic relays
• H01H 50/54 - Contact arrangements

Abstract

This non-magnetic plate has a thin-plate shape and is detachable with respect to a shaft part of an electromagnet of an electromagnetic contactor, the non-magnetic plate including: a circular hole section that is provided in the center of the non-magnetic plate and into which the shaft part is fitted; and a cut-out section that is provided connected to the tip end and hole section of the non-magnetic plate, and facilitates insertion of the shaft part into the hole section from the tip end side.

IPC Classes  ?

• H01H 49/00 - Apparatus or processes specially adapted to the manufacture of relays or parts thereof
• H01H 50/36 - Stationary parts of magnetic circuit, e.g. yoke

Abstract

A mechanical latching device of an electromagnetic contactor eliminates a need to adjust a gap between portions mechanically preventing returning of a latch support. A latch support includes a protrusion protruding laterally and formed with a latch surface facing a released side. A rotating member has one end side rotatably supported and the other end side biased toward the protrusion. When the latch support is on the released side, an outer peripheral surface of the other end side contacts with a tip of the protrusion to allow the latch support to be displaced to a closed side. When the latch support is on the closed side, the other end side rotates according to a position of the latch support in a displacement direction, and a tip surface faces the latch surface to mechanically prevent the latch support from returning to the released side at plural positions along the displacement direction.

IPC Classes  ?

• H01H 50/32 - Latching movable parts mechanically
• H01H 50/64 - Driving arrangements between movable part of magnetic circuit and contact
• H01H 51/10 - Contacts retained open or closed by a mechanical latch which is controlled by an electromagnet
• H01H 50/02 - BasesCasingsCovers

Abstract

In a case (12), an engagement hole (21) is formed in a side surface in a width direction. On a cover (13), a protruding piece (22) protruding to the case (12) side is formed, and a leading end (23) of the protruding piece (22) is fitted to the engagement hole (21) from the inside. In a reset bar (34), a recessed portion (55) is formed in a predetermined range of an outer peripheral surface in a depth direction and a circumferential direction, and when in either an initial position or an automatic reset position, the reset bar prevents the leading end (23) from being pushed inward by the outer peripheral surface facing the reverse side of the protruding piece (22). When in a manual reset position, the reset bar permits the leading end (23) to be pushed inward by the recessed portion (55) facing the reverse side of the protruding piece (22).

IPC Classes  ?

• H01H 61/01 - Electrothermal relays Details

Abstract

A bimetal (21) bends when heated. When the bimetal bends, a shifter (22) is displaced by being pushed by the bimetal. A lever (23) is pivotally supported on a pivot shaft (63), and pivots by being pushed by the shifter when the shifter is displaced. When the lever pivots, a reversing mechanism is pushed by the lever from a position thereof radially outside a position thereof that is pushed by the shifter, thereby reversing a contact.

IPC Classes  ?

• H01H 61/00 - Electrothermal relays
• H01H 61/01 - Electrothermal relays Details

Abstract

The present invention relates to a relay and an electromagnetic switch comprising the relay. The relay comprises: a capacitor; an output unit that outputs, when an electric current having a settling current value or more flows in a wire, a trip signal for blocking the electric current flowing through the wire, by being actuated by means of electric power supplied from the capacitor; a control unit that detects reduction in capacitance of the capacitor; and a notification unit that, when the reduction in capacitance is detected by the control unit, gives a notification to the outside of the relay about the reduction in capacitance.

IPC Classes  ?

• H01H 9/54 - Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
• H01H 45/08 - IndicatorsDistinguishing marks
• H02H 3/08 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess current
• H01H 47/00 - Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current

Abstract

Provided is a current sensor (3) wound at least one turn in a coil shape around a measurement conductor (2a) through which a primary current flows. The current sensor comprises: an insulation wire (4) which includes a core wire (5) having a flexible rod-shaped body and an insulation coating unit (6) that covers the outer circumference of the core wire; and a coil thin wire (7), one terminal of which is electrically connected to one terminal of the core wire, and which is wound around the outer circumference of the insulation coating unit in a spiral shape and functions as a secondary coil. In addition, the other terminal of the core wire that is not electrically connected and the other terminal of the coil thin wire are taken as output terminals.

IPC Classes  ?

• G01R 15/18 - Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
• H01F 5/06 - Insulation of windings
• H01F 38/28 - Current transformers

Abstract

A terminal cover to cover a terminal to which an electric wire is to be connected, the terminal cover includes: an outer frame having an outer frame notch; and an inner frame provided within the outer frame notch in the outer frame, the inner frame having an inner frame notch smaller than the outer frame notch. Further, the outer frame and the inner frame are formed thinner than a peripheral portion and are connected to each other with cutoff portions that are bendable, twistable, or cuttable with a cutting tool, and the terminal is viewed through the inner frame notch.

IPC Classes  ?

• H01R 4/28 - Clamped connectionsSpring connections
• H01H 9/02 - Bases, casings, or covers
• H01H 71/08 - TerminalsConnections

Abstract

An electromagnetic contactor 1 includes a case including an arc extinguishing chamber, an arc extinguishing cover attached to the case and covering the arc extinguishing chamber, and terminal covers arranged on the arc extinguishing cover and attached to the case. The case is formed with a first engagement portion, and the terminal covers are formed with a second engagement portion that is engaged with the first engagement portion to hold the terminal covers on the case. Then, the terminal covers are held on the case in either a first state where there is a gap between the first and second engagement portions or a second state where the terminal covers move in directions away from the arc extinguishing cover and the first and second engagement portions are engaged.

IPC Classes  ?

• H01H 9/02 - Bases, casings, or covers
• H01H 50/14 - Terminal arrangements
• H01H 50/02 - BasesCasingsCovers

Abstract

This sealed electromagnetic contactor is provided with a pair of fixed contacts (10), (11) having fixed contact points (10a), (11a), a movable contact (12) having a pair of movable contact points (12a), (12b) capable of coming into contact with or separating from the fixed contact points of the pair of fixed contacts, an electromagnet unit (7) driving the movable contact, a sealed container (4) housing the pair of fixed contacts, the movable contact, and the electromagnet unit in the same space in a sealed manner and having enclosed therein an arc-extinguishing gas, and two pairs of arc-extinguishing permanent magnets (30)-(33) arranged in the interior of the sealed container for elongating arcs occurring between the fixed contact points of the pair of fixed contacts and the pair of movable contact points of the movable contact.

IPC Classes  ?

• H01H 9/44 - Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
• H01H 50/00 - Details of electromagnetic relays
• H01H 50/38 - Part of main magnetic circuit shaped to suppress arcing between the contacts of the relay

Abstract

The present invention comprises: a main contact part (21) that opens and closes an electric circuit of a main circuit by operating along a predetermined opening and closing direction; an electromagnet part (23) that switches the main contact part (21) between opening and closing; a container body (12) made of resin, the main contact part (21) and the electromagnet part (23) being arranged in the interior of said container body (12); an auxiliary contact part (22) provided to the outside of the container body (12) further toward one side in the opening and closing direction than the main contact part (21), the auxiliary contact part (22) opening and closing an electric circuit of an auxiliary circuit by operating along the opening and closing direction together with the main contact part (21); and an auxiliary contact accommodation part (13) that is made of resin and that communicates with the interior of the container body (12), the auxiliary contact part (22) being arranged in the interior of the auxiliary contact accommodation part (13). A breaking gas is sealed within the interior of the container body (12) and the auxiliary contact accommodation part (13).

IPC Classes  ?

• H01H 50/04 - Mounting complete relay or separate parts of relay on a base or inside a case
• H01H 50/54 - Contact arrangements
• H01H 1/66 - Contacts sealed in an evacuated or gas-filled envelope, e.g. magnetic dry-reed contacts

Abstract

The present invention comprises a through hole (91) formed in a resin hermetically sealed container (11) so as to enable filling with a gas, and a screw (92) that fastens with the through hole (91) so as to seal the through hole (91).

IPC Classes  ?

• H01H 9/04 - Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
• H01H 49/00 - Apparatus or processes specially adapted to the manufacture of relays or parts thereof
• H01H 50/00 - Details of electromagnetic relays
• H01H 50/54 - Contact arrangements

Abstract

The present invention comprises: a pair of fixed contact elements (10), (11) having fixed contact points (10a), (11a); a movable contact element (12) having a pair of movable contact points (12a), (12b) that are capable of moving toward and away from the fixed contact points of the pair of fixed contact elements; an electromagnet unit (7) that drives the movable contact element; and a hermetically sealed container (4) in which the pair of fixed contact elements, the movable contact element, and the electromagnet unit are hermetically sealed and stored in the same space.

IPC Classes  ?

• H01H 50/02 - BasesCasingsCovers
• H01H 50/38 - Part of main magnetic circuit shaped to suppress arcing between the contacts of the relay

Abstract

The present invention comprises: a main contact part (21) that is for opening and closing an electric path of a main circuit, that has a pair of main fixed contact pieces (31) each having a main fixed contact (33) at one end thereof and each being connected to the main circuit at the other end, and that has a main movable contact piece (32) having a pair of main movable contacts (34) brought into contact with and separated from the main fixed contacts (33); a contact support (51) that supports the main movable contact piece (32); an electromagnet part (23) that is for switching the opening and closing of the main contact part (21) via the contact support (51); and a resin airtight container (15) which has the main contact part (21) and the electromagnet part (23) disposed inside thereof, and has shielding gas sealed inside thereof.

IPC Classes  ?

• H01H 50/04 - Mounting complete relay or separate parts of relay on a base or inside a case
• H01H 50/54 - Contact arrangements
• H01H 1/66 - Contacts sealed in an evacuated or gas-filled envelope, e.g. magnetic dry-reed contacts

Abstract

This auxiliary contact unit comprises a case (21) and a case (31) which are divided widthwise. The case (21) comprises a side wall section (22) and separation wall sections (23) protruding toward the case (31) from a wall surface of the side wall section (22). The case (31) comprises a side wall section (32) in which the tips of the separation wall sections (23) are in contact with a wall surface when the case (31) is assembled with the case (21). The range surrounded by the side wall section (22), the separation wall sections (23), and the side wall section (32) serves as a contact accommodation part (41). The side wall section (32) comprises crossing wall sections (33) which protrude from the wall surface toward the side wall section (22) along the separation wall sections (23).

IPC Classes  ?

• H01H 50/04 - Mounting complete relay or separate parts of relay on a base or inside a case
• H01H 50/54 - Contact arrangements

Abstract

An auxiliary contact unit (12) attached to the side surface of an electromagnetic contactor (11) by a snap fitting (13), wherein the snap fitting (13) comprises: a protruding piece (53), which protrudes toward the electromagnetic contactor (11) and in which a distal-end part (55) formed in a hook shape engages with the electromagnetic contactor (11); and a release operation part (54) that is formed on the base-end side of the protruding piece (53) and that releases the distal-end part (55) engaged with the electromagnetic contactor (11) through flexing when pressed from the outside.

IPC Classes  ?

• H01H 50/04 - Mounting complete relay or separate parts of relay on a base or inside a case
• H01H 50/54 - Contact arrangements

Abstract

An electromagnetic contactor including: an arc-extinguishing chamber in which a contact portion is disposed; a case having an arc-extinguishing chamber housing portion in which the arc-extinguishing chamber is housed; and an arc-extinguishing cover mounted on the case and configured to cover the arc-extinguishing chamber housing portion, wherein at least one of the case and the arc-extinguishing cover has a first engaging portion and a second engaging portion, the other has a third engaging portion configured to engage with the first engaging portion and the second engaging portion, and the arc-extinguishing cover is held to the case in either a first state in which the first engaging portion and the third engaging portion are engaged with each other or a second state in which the second engaging portion is engaged with the third engaging portion.

IPC Classes  ?

• H01H 33/08 - Stationary parts for restricting or subdividing the arc, e.g. barrier plate
• H01H 50/02 - BasesCasingsCovers

Abstract

The main body frame includes a first frame including a flexible protruding plate portion, a second frame facing the first frame in a first direction to form the housing section, and a snap-fit mechanism connecting the first frame to the second frame. The snap-fit mechanism includes a fitted portion provided on the flexible protruding plate portion and a fitting projection portion provided on a side wall of the second frame and fitting with the fitted portion. The fitting projection portion and the fitted portion are fitted by bringing the first and second frames into relative proximity in the first direction, and the fitting is released by relatively displacing the first and second frames in a second direction orthogonal to the first direction.

IPC Classes  ?

• H01H 50/02 - BasesCasingsCovers
• H01H 50/30 - Mechanical arrangements for preventing or damping vibration or shock, e.g. by balancing of armature

Abstract

An auxiliary contact unit including: a pair of fixed contact pieces; a movable contact piece arranged in a contactable and separable manner to and from the pair of fixed contact pieces; an auxiliary contact support configured to hold the movable contact piece and move in conjunction with opening/closing operation of an electromagnetic contactor; and a unit case configured to house the pair of fixed contact pieces, the movable contact piece, and the auxiliary contact support in a housing portion formed with joining portions of respective ones of a first case member and a second case member opposed to each other, wherein the joining portions of the respective ones of the first and second case members are air-tightly joined to each other.

IPC Classes  ?

• H01H 50/18 - Movable parts of magnetic circuits, e.g. armature
• H01H 50/04 - Mounting complete relay or separate parts of relay on a base or inside a case
• H01H 50/56 - Contact spring sets

Abstract

An accessory device (9) is provided with a terminal to which one end of a conductor portion (W1) of a flexible connecting electric wire W can be attached, and includes an element which exerts a prescribed effect on the operation of an electrical appliance (1). The accessory device includes a first engaging portion (27) and a second engaging portion for detachably engaging a fixed surface of the accessory device to a fixing surface of the electrical appliance, wherein the first engaging portion has a common shape, irrespective of the type of electrical appliance, and the second engaging portion is configured from a plurality of engaging portions (28), (29) in positions that differ in accordance with the shape of the fixing surface of the electrical appliance.

IPC Classes  ?

• H01H 50/04 - Mounting complete relay or separate parts of relay on a base or inside a case

Abstract

The present invention is an electromagnetic contactor (1) provided with: a case (3) having an arc extinction chamber (14); an arc extinction cover (8) which is mounted on the case and covers the arc extinction chamber; and terminal covers (7a) and (7b) which are disposed on the arc extinction cover and are mounted on the case. A first engagement section (17) is formed on the case, and a second engagement section (40), which engages the first engagement section thereby resulting in the terminal covers being held to the case, is formed on the terminal covers. The terminal covers are held to the case in either a first state, in which there is a gap between the first engagement section and the second engagement section, or a second state, in which the terminal covers move in a direction away from the arc extinction cover and the first engagement section and the second engagement section engage.

IPC Classes  ?

• H01H 50/02 - BasesCasingsCovers
• H01H 50/14 - Terminal arrangements

Abstract

An electromagnetic contactor (1) comprising: arc extinguishing chambers (S) that are each provided with a contact point section (6); a case (3) that has an arc extinguishing chamber housing section (9) in which the arc extinguishing chambers are housed; and an arc extinguishing cover (7) that is mounted to the case and covers the arc extinguishing chamber housing section. At least one of the case and the arc extinguishing cover has first engagement sections (22, 24) and second engagement sections (23, 25), and the other has third engagement sections (26, 28) that engage with the first engagement sections and the second engagement sections. The case retains the arc extinguishing cover in a first condition, in which the first engagement sections are engaged with the third engagement sections, or in a second condition, in which the second engagement sections are engaged with the third engagement sections.

IPC Classes  ?

• H01H 9/04 - Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
• H01H 50/02 - BasesCasingsCovers

Abstract

Provided is an electric device in which components within a body frame can be easily replaced. In the present invention, an electric contactor (1) is provided with a body frame (30) that houses a contact point unit (10) and an electromagnet unit (20) in a housing section (30a). The body frame comprises a first frame (31) that includes a flexible panel section (51), a second frame (41) that faces the first frame in a first direction to form the housing section, and a snap-fit mechanism (50) that links the first frame and the second frame. The snap-fit mechanism includes an engaged section disposed on the flexible protruding panel section (51), and an engaging protruding section (55) disposed on a side wall of the second frame and engaging with the engaged section. The engaged section and the engaging protruding section are engaged by the first frame and the second frame being brought into relative proximity in the first direction, and the engagement is released by the first frame and the second frame being relatively displaced in a second direction that is orthogonal to the first direction.

IPC Classes  ?

• H01H 50/02 - BasesCasingsCovers
• H01H 50/30 - Mechanical arrangements for preventing or damping vibration or shock, e.g. by balancing of armature

Abstract

The reliability of an auxiliary contact unit is enhanced. An auxiliary contact unit (1) is provided with: one pair of fixed contacts (3A and 4A); a movable contact (5A) arranged so as to be able to come into contact with and separate from the one pair of fixed contacts (3A and 4A); an auxiliary contact support (10) holding the movable contact (5A) and moving in an interlocked manner with an open/close operation of an electromagnetic contactor (50); and a unit case (20) accommodating the one pair of fixed contacts (3A, 4B), the movable contact (5A), and the auxiliary contact support (10) inside an accommodation section (24) formed by arranging the respective joining parts (21a, 22a) of a first case member (21) and a second case member (22) face to face in an orthogonal direction to the moving direction of the auxiliary contact support (10). The joining parts of the first and second case members (21, 22) are air-tightly joined together.

IPC Classes  ?

• H01H 50/02 - BasesCasingsCovers
• H01H 50/04 - Mounting complete relay or separate parts of relay on a base or inside a case
• H01H 50/54 - Contact arrangements

Abstract

Provided is a sealing valve (15) disposed in a flow path (16) which is disposed in a portion of a sealed container (1) and provides communication between an internal space (K) and the outside. The sealing valve is equipped with: a valve seat (17) having a valve opening (3c) opened to the outside and a seat surface formed on an inner peripheral surface thereof; a plunger (18) disposed in the flow path; and a biasing spring (19) for applying a biasing force to push the plunger toward the valve seat side such that a seat part (18a) of the plunger comes into contact with the seat surface of the valve seat. This sealing valve enters a closed state when the seat part of the plunger comes into contact with the seat surface of the valve seat and enters an open state when a supply nozzle (21) is inserted through the valve opening and moved in a direction in which the plunger is separated from the valve seat against the biasing force of the biasing spring.

IPC Classes  ?

• H01H 49/00 - Apparatus or processes specially adapted to the manufacture of relays or parts thereof
• H01H 50/02 - BasesCasingsCovers
• H01H 50/54 - Contact arrangements

Abstract

A panelboard device according to an embodiment includes a housing and multiple devices stored in the housing. At least one of the multiple devices includes a device main unit; a state detecting unit configured to detect a state of the device main unit; a light emitting unit; and a light emission control unit configured to acquire information indicating the state of the device main unit from the state detecting unit, and to cause the light emitting unit to transmit an optical signal including information indicating the state.

IPC Classes  ?

• H02B 1/32 - Mounting of devices therein
• H05K 5/02 - Casings, cabinets or drawers for electric apparatus Details
• H02B 1/38 - Hinged covers or doors

Abstract

The invention comprises an inside member (73), which is placed on the inside of a plate spring (34). The inside member (73) comprises: a support part (81) that contacts an end part of a first bent section (53) and supports the plate spring (34), the end part becoming the fixed-end side of the plate spring (34); and a bent-section-restricting part (82). When the plate spring (34), on being installed, is pushed in beyond the normal position to the insertion-direction inner side, the plate spring (34) contacts the bent-section-restricting part (82) at a predetermined position with respect to the first bent section (53), and is stopped thereby.

IPC Classes  ?

• H01R 4/48 - Clamped connectionsSpring connections using a spring, clip or other resilient member
• H01R 9/00 - Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocksTerminals or binding posts mounted upon a base or in a caseBases therefor

Abstract

In this invention, a tool insertion hole (25) is provided with a pair of guide surfaces (71), (72) parallel to the width direction of a plate spring (34) that face one another such that the spacing distance therebetween becomes narrower toward the depth side. The pair of guide surfaces (71), (72) are set in such a manner as to be in contact with each end surface (62) until a tool (61) reaches a position for releasing an engagement, in so doing, at least one is in a surface contact, or a contact through a straight line along the width direction, with one of the end surfaces (62).

IPC Classes  ?

• H01R 4/48 - Clamped connectionsSpring connections using a spring, clip or other resilient member

Abstract

The invention comprises a linear free-end-side part (51) which is disposed in such a manner that the tip (51a) thereof protrudes towards the far side in the insertion direction and towards a terminal path (56) and a plate surface intersects with the terminal path (56). At an insertion position where the tip (19a) of a terminal part (19) has reached the tip (51a) of the free-end-side part (51), the angle (β) formed by the terminal part (19) and the free-end-side part (51) is within ±2 degrees of 45 degrees.

IPC Classes  ?

• H01R 4/48 - Clamped connectionsSpring connections using a spring, clip or other resilient member

Abstract

A differential electrical protection device D including N−1 phase conductors, each phase conductor including, between an input, or upper, connection land and an output, or lower, connection land, a portion able to pass through a torus and a portion able to pass through a current measurement and supply sensor, the input connection lands being situated in a first plane P1, and the output connection lands extending in a second plane P2, in that the supply and measurement sensors of the N−1 phase conductors are each positioned in the space situated between the two planes P1,P2, and wherein it includes an additional phase conductor including an input connection land and an output connection land, a portion able to pass through the torus and a portion able to pass through an additional measurement sensor only measuring the current, this additional measurement sensor being of small size and being positioned directly above the torus in such a way that the assembly formed by the torus and the additional sensor is situated substantially in the space between the two planes P1,P2.

IPC Classes  ?

• H01H 83/22 - Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition the other condition being imbalance of two or more currents or voltages
• H01H 83/14 - Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection
• H01F 27/36 - Electric or magnetic shields or screens
• G01R 15/18 - Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
• H01F 38/30 - Constructions
• H01H 71/02 - HousingsCasingsBasesMountings
• G01R 31/50 - Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections

Abstract

In this invention, a first surface (41) and a second surface (42) having a level difference (d), are formed on a housing (15). When a ferrule terminal (18) is inserted, an abutting section (44) in each of wire insertion holes (21) and (24) abuts a tapered surface (19) of a collar section (17) thereby preventing further insertion. The height of the step difference (d) is set in such a manner that, in this state, the base end of the collar section (17) is disposed between the first surface (41) and the second surface (42).

IPC Classes  ?

• H01R 9/22 - Bases, e.g. strip, block, panel
• H01R 4/48 - Clamped connectionsSpring connections using a spring, clip or other resilient member

Goods & Services

Power Distribution or Control Machines and Apparatus, Namely, Electrical Power Distribution Units, Rotary Converters, Phase Modifiers, Electrical Contactors

Abstract

The present invention is provided with: lead wire inserting holes L1-L12 that are formed in terminal surfaces (8A-8C) of a case (2); and a plurality of lead wire connecting sections (H1-H12), which are disposed on the case side, and which electrically connect, to contact points, core wires (35, 36) of lead wires inserted through the lead wire inserting holes. The lead wire inserting holes are arrayed in a zigzag manner.

IPC Classes  ?

• H01R 9/00 - Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocksTerminals or binding posts mounted upon a base or in a caseBases therefor
• H01R 4/48 - Clamped connectionsSpring connections using a spring, clip or other resilient member

Abstract

The contact device comprises: a housing case (2) housing a main contact mechanism (8) having fixed contacts (17), (18); external terminals (41) disposed outside of the housing case; and terminal plates (37), each passing through the housing case and electrically connecting the fixed contacts to the corresponding external terminal. Each of the terminal plates is provided with a bent portion (42) in surface contact with side surfaces (30a), (30b) from the housing case.

IPC Classes  ?

• H01H 50/14 - Terminal arrangements

Abstract

The present invention inhibits an arc generated at a main contact part from entering the space among the main contact part, a lid plate part, and an insulation case and inhibits making contact with an auxiliary terminal. This contact device comprises: a main contact mechanism provided with a pair of main fixed contacts (11A) and (11B) and a main movable contact (12); an auxiliary contact mechanism which is placed in a position different from that of the main contact mechanism and which is provided with auxiliary fixed contacts (21A)-(21D) and auxiliary movable contacts (22A) and (22B); a movable shaft (40) which causes the main movable contact and the auxiliary movable contacts to move in conjunction; rod-like auxiliary terminals (31A)-(31D) electrically connected to the auxiliary fixed contacts; a lid plate part (8) having holes (32A)-(32D) through which the auxiliary terminals pass; an insulation case in which the main contact mechanism and the auxiliary contact mechanism are housed and which includes an auxiliary terminal case part (34) that separates the main contact mechanism and the auxiliary terminals from each other; and a cylindrical body (7) which covers these parts exteriorly and which is joined with the lid plate part, wherein fitting parts which fit into each other are formed at a joint part between the lid plate part (8) and the auxiliary terminal case part (34).

IPC Classes  ?

• H01H 50/54 - Contact arrangements
• H01H 50/56 - Contact spring sets

Abstract

An electromagnet device (17) is provided with: a fixed core (17a, 17b); a coil unit (17g) comprising spools (17e, 17f) with electromagnetic coils (17c, 17d) wound on an outer periphery thereof; a yoke (17j) fixed to one end of each of the fixed cores which have been inserted through core insertion holes (17h, 17i) of the spool; magnetic pole plates (17k, 17m) connected with another end of each of the fixed cores which have been inserted through the core insertion holes of the spool; and a movable core (17n) disposed to oppose the magnetic pole plates. The coil unit is provided with first connecting portions (30 to 33, 34 to 37, 46, 47, 38, 39) which detachably connect the yoke and the magnetic pole plates.

IPC Classes  ?

• H01F 7/127 - Assembling
• H01F 7/16 - Rectilinearly-movable armatures
• H01H 50/36 - Stationary parts of magnetic circuit, e.g. yoke
• H01H 50/44 - Magnetic coils or windings

Abstract

Provided is an operation coil drive device for an electromagnetic contactor capable of reliably detecting the adsorption state of a movable iron core without using a position sensor or a timer. The present invention comprises: a current detection unit (41) that detects coil current flowing through operation coils (21d, 21e) when switching control is performed on electromagnetic contactor operation coils; and a drive control unit (36) that controls the on/off time ratio for a semiconductor switching element (40) that switches and applies power supply voltage to the operation coils, controlling same so as to be larger during closed circuit control than during holding control. The drive control unit comprises: a trajectory-for-determination setting unit (52a) that sets a trajectory for determination that continuously increases along a change trajectory for coil current detected by the current detection unit during closed circuit control; and a closed circuit state determination unit (54) that determines a contact closed circuit state caused by contact by a movable contact to a fixed contact, on the basis of the deviation between this trajectory for determination from the trajectory-for-determination setting unit and the coil current detected by the current detection unit.

IPC Classes  ?

• H01H 47/32 - Energising current supplied by semiconductor device

Abstract

Provided is an operation coil drive device for an electromagnetic contactor, capable of confirming the operation resistance value for an operation coil and capable of obtaining a suitable operation coil current for operation conditions. The present invention comprises: current and voltage detection units (37, 38) that detect the current and inter-terminal voltage that flow during switching control of an operation coil in an electromagnetic contactor; and a drive control unit (35) that increases and decreases the on/off time ratio for a semiconductor switching element that switches and applies power supply voltage to the operation coil, increasing same during closed circuit control and decreasing same during holding control. The drive control unit has: a closed circuit control inductance calculation unit (51) that calculates the inductance of the operation coil immediately after commencement of closed circuit control; a closed circuit control resistance value calculation unit (52) that calculates the DC resistance value of the operation coil on the basis of said calculation results; and a closed circuit control switching correction unit (54) that corrects the on/off time ratio of the semiconductor switching element during closed circuit control, on the basis of said calculation results.

IPC Classes  ?

• H01H 47/32 - Energising current supplied by semiconductor device
• H01F 7/18 - Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
• H01H 47/00 - Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current

Abstract

Provided is an electromagnetic contactor allowing an arc-extending space to be enlarged without having to enlarge the size of the electromagnetic contactor in the direction in which the main contact mechanism housing chamber and an auxiliary contact mechanism housing chamber are arranged. This electromagnetic contactor (1) comprises a partitioning wall (11) separating the main contact mechanism housing chamber (25) from the auxiliary contact mechanism housing chamber (41). A pair of arc extension recesses (16) is formed by indenting the partitioning wall (11) toward the auxiliary contact mechanism housing chamber (41).

IPC Classes  ?

• H01H 50/54 - Contact arrangements
• H01H 50/00 - Details of electromagnetic relays
• H01H 50/38 - Part of main magnetic circuit shaped to suppress arcing between the contacts of the relay

Abstract

Provided is an electromagnetic contactor in which infiltration of foreign matter from a main contact mechanism housing chamber into an auxiliary contact mechanism housing chamber via a through-hole in a partition wall, and infiltration of foreign matter from the auxiliary contact mechanism housing chamber into the main contact mechanism housing chamber via the through-hole, can be prevented appropriately. In an electromagnetic contactor (1), a main contact mechanism housing chamber (A) and an auxiliary contact mechanism housing chamber (B) are partitioned by a partition wall (10) having formed therein a through-hole (10a) through which a linking shaft (34) is inserted. A foreign matter infiltration-preventive mechanism (60) is disposed in the periphery of the through-hole (10a).

IPC Classes  ?

• H01H 50/54 - Contact arrangements
• H01H 50/02 - BasesCasingsCovers

Abstract

Provided are a contact device and an electromagnetic contact apparatus using the contact device, that enable, in a state where a main contact part and an auxiliary contact part are linked by a linking shaft, an external connection terminal of the auxiliary connection part to be drawn upward, while avoiding the main connection part. The present invention comprises the following: a main contact part (10) which comprises a pair of fixed contactors (11, 12) disposed so that a prescribed gap is maintained therebetween, and a moveable contactor (13) that is elastically supported by a linking shaft (14) and that is disposed so as to come into contact with and separate from the pair of fixed contactors; an auxiliary contact part (20) which comprises pairs of fixed contacts (23A-23D) that are disposed at positions different from the main contact part and that are disposed so that a prescribed gap is maintained therebetween, and moveable contacts (25A, 25B) that are disposed so as to be linked to the linking shaft (14) and so as to come into contact with and separate from the pair of fixed contacts; a contact housing part (5) that houses the main contact part and the auxiliary contact part; and external connection terminals (29A-29D) that are electrically linked to the pair of fixed contacts of the auxiliary contact part and that protrude from the contact housing part.

IPC Classes  ?

• H01H 50/54 - Contact arrangements
• H01H 1/58 - Electric connections to or between contactsTerminals
• H01H 1/66 - Contacts sealed in an evacuated or gas-filled envelope, e.g. magnetic dry-reed contacts
• H01H 50/02 - BasesCasingsCovers
• H01H 50/14 - Terminal arrangements

Abstract

A switch device includes an operation unit, a switch unit detachably attached to the operation unit, and an engagement portion provided at the operation unit. The switch unit includes an opening-closing contact mechanism opened in association with an operation of the operation unit, and a drive portion driving the opening-closing contact mechanism to an open condition at a standby position and to a closed condition at a usage position. When the operation unit is attached to the switch unit, the engagement portion engages the drive portion to drive the drive portion from the standby position to the usage position. When the operation unit is inserted to the switch unit, the operation unit and the switch unit are engaged at the usage position.

IPC Classes  ?

• H01H 13/14 - Operating parts, e.g. push-button
• H01H 25/00 - Switches with compound movement of handle or other operating part
• H01H 3/02 - Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
• H01H 13/62 - Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member the contact returning to its original state upon manual release of a latch

Abstract

An electromagnetic contactor with connecting spring including: a movable core contact plate section that is inserted into a through hole formed in a movable core and comes into contact with a contact support side of the through hole; and a pair of curved plate sections each joined to either end of the movable core contact plate section and housed in connecting spring tip housing sections formed in the contact support, the sides of which opposite to a contact surface of the movable core contact plate section come into contact with the connecting spring tip housing sections. In the movable core contact plate section, a depressed section is formed in a direction crossing a longitudinal direction to bulge out to an opposite side to the contact support side is formed, and contact sections that come into contact with the through hole are formed on both ends of the depressed section.

IPC Classes  ?

• H01H 75/00 - Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of power reset mechanism
• H01H 50/30 - Mechanical arrangements for preventing or damping vibration or shock, e.g. by balancing of armature
• H01H 45/04 - Mounting complete relay or separate parts of relay on a base or inside a case
• H01H 50/54 - Contact arrangements
• H01H 50/64 - Driving arrangements between movable part of magnetic circuit and contact
• H01H 50/04 - Mounting complete relay or separate parts of relay on a base or inside a case
• H01H 50/22 - Movable parts of magnetic circuits, e.g. armature movable inside coil and substantially lengthwise with respect to axis thereofMovable parts of magnetic circuits, e.g. armature movable coaxially with respect to coil wherein the magnetic circuit is substantially closed

Abstract

[Problem] To provide a rotary operation type switch allowing a thin and small constitution with a small dimension in depth from the operation surface to be adopted, allowing opening and closing in an open-close contact mechanism to be executed through a pressing action accompanying the rotary operation of a rotary operation body and not through a sliding movement of a mobile contact. [Solution] The rotary operation type switch comprises: a rotary operation body supported by a frame in a such a manner as to enable a rotary operation; and a plurality of open-close contact mechanisms facing the lower surface of the rotary operation body, disposed by leaving predetermined intervals in the rotation direction of the rotary operation body, and executing opening-closing actions mediated by a press-down operation. A rotating press plate is provided between the rotary operation body and the open-close contact mechanisms. Accompanying the rotary operation, the rotary operation body rotates and selectively presses each of the open-close contact mechanisms.

IPC Classes  ?

• H01H 19/63 - Contacts actuated by axial cams

Abstract

A polarized DC electromagnetic device and electromagnetic contactor using same to improve assembly efficiency without size increase of the electromagnetic device. The device includes a plunger inserted through a cylindrical portion of a spool around which an excitation coil is wound and having a first armature and a second armature attached to both ends, an outer yoke attracting the first armature and the second armature, an inner yoke disposed inside the outer yoke and attracting the second armature, and a permanent magnet disposed between the outer yoke and the inner yoke. The spool includes radially protruding flange portions respectively formed at both ends of the cylindrical portion, a coil terminal attachment portion formed in the flange portion on the first armature side, and a coil terminal attached to the coil terminal attachment portion.

IPC Classes  ?

• H01H 51/22 - Polarised relays
• H01H 50/14 - Terminal arrangements
• H01H 50/20 - Movable parts of magnetic circuits, e.g. armature movable inside coil and substantially lengthwise with respect to axis thereofMovable parts of magnetic circuits, e.g. armature movable coaxially with respect to coil
• H01H 50/36 - Stationary parts of magnetic circuit, e.g. yoke
• H01H 50/64 - Driving arrangements between movable part of magnetic circuit and contact

Abstract

The electromagnetic contactor includes a first frame in which an operation electromagnet is mounted; a second frame in which a contact mechanism is mounted; and a snap-fit section that is made up of a fitting protruding section and a hook section formed to one and the other of the first and second frame, respectively, the hook section fitting to the fitting protruding section. The hook section has a flexible projecting plate section formed in a projecting manner to an open end of either the first or second frame and a fitting section formed at a tip of the flexible projecting plate section, the fitting section fitting to the fitting protruding section. The flexible projecting plate section is provided with elasticity that fits the fitting section to a base side of the fitting protruding section in accordance with progress of wear between the fitting section and the fitting protruding section.

IPC Classes  ?

• H01H 50/02 - BasesCasingsCovers
• H01H 50/04 - Mounting complete relay or separate parts of relay on a base or inside a case

Abstract

There is provided a rail attachment apparatus for an electrical device in which a biasing elastic function is imparted to a slider itself, whereby the slider can be adjusted to be thin and the number of components can be decreased. The rail attachment apparatus includes a nipping portion that nips one side edge of an attaching rail fixed to an attaching surface of the electrical device, and a slider that is opposed to the nipping portion and slidably held at the other side edge of the attaching rail in a direction intersecting with this attaching rail. The slider is provided with integrally formed bending elastic portions which bias the slider in a direction to enable nipping the attaching rail.

IPC Classes  ?

• H02B 1/052 - Mounting on rails
• H05K 7/14 - Mounting supporting structure in casing or on frame or rack
• H01R 9/26 - Clip-on terminal blocks for side-by-side rail or strip-mounting
• H01H 50/04 - Mounting complete relay or separate parts of relay on a base or inside a case
• H05K 7/12 - Resilient or clamping means for holding component to structure
• F16B 2/22 - Clips, i.e. with gripping action effected solely by the inherent resistance to deformation of the material of the fastening of resilient material, e.g. rubbery material

Abstract

An electromagnetic contactor in which a shock-absorbing member is integrally formed in a frame. The electromagnetic contactor includes a first frame in which an operating electromagnet is disposed and coil terminals which supply power to a coil of the electromagnet is formed to project from a side surface, and a second frame in which a contact mechanism having an auxiliary contact is disposed and has power source side terminals on one end side and load side terminals on the other end side, and in the first frame and the second frame, a snap fit is formed which can attach the second frame to the first frame in both of a normal direction coupled state where the coil terminals and the power source side terminals face the same direction and a reverse direction coupled state in which the coil terminals and the load side terminals face the same direction.

IPC Classes  ?

• H01H 9/00 - Details of switching devices, not covered by groups
• H01H 50/30 - Mechanical arrangements for preventing or damping vibration or shock, e.g. by balancing of armature
• H01H 50/44 - Magnetic coils or windings

Abstract

The DC operated polarized electromagnet includes a spool around which an excitation coil is wound and that has a central opening, a plunger having first and second armatures, fitted individually, an outer yoke enclosing opposing side faces of the spool so as to attract the first armature, an inner yoke arranged on the inner side of the outer yoke so as to attract the second armature, and permanent magnets arranged between the outer yoke and the inner yoke, and reduces magnetoresistance by setting the thickness of the outer yoke thicker than the thickness of the inner yoke so that convergent magnetic flux in the plunger is diverted into the outer yoke.

IPC Classes  ?

• H01H 51/01 - Relays in which the armature is maintained in one position by a permanent magnet and freed by energisation of a coil producing an opposing magnetic field
• H01H 51/22 - Polarised relays
• H01F 7/16 - Rectilinearly-movable armatures
• H01F 7/122 - Guiding or setting position of armatures, e.g. retaining armatures in their end position by permanent magnet
• H01H 50/36 - Stationary parts of magnetic circuit, e.g. yoke
• H01F 7/08 - ElectromagnetsActuators including electromagnets with armatures
• H01H 50/44 - Magnetic coils or windings
• H01H 50/60 - Contact arrangements moving contact being rigidly combined with movable part of magnetic circuit
• H01H 50/54 - Contact arrangements

Abstract

An electromagnetic contactor capable of coupling either one of an alternating current (AC) electromagnet or a direct current (DC) electromagnet with an identical contact support is provided. The electromagnetic contactor includes an electromagnet including either one of the AC electromagnet (12AC) including a movable core or the DC electromagnet (12DC) including an armature, and a contact support (36) configured to hold plural movable contacts in alignment to be coupled with and driven by the electromagnet. The contact support includes a coupling portion (40) including a movable core contact portion (41), coupling spring edge accommodation portions (46), and armature contact portions (51) arranged on opposite sides with respect to the movable core contact portion of the coupling spring edge accommodation portion. The AC electromagnet (12AC) includes an AC electromagnet coupling spring (56) and the DC electromagnet (12DC) includes a DC electromagnet coupling spring (161).

IPC Classes  ?

• H01H 50/04 - Mounting complete relay or separate parts of relay on a base or inside a case
• H01H 51/22 - Polarised relays
• H01H 50/64 - Driving arrangements between movable part of magnetic circuit and contact
• H01H 50/54 - Contact arrangements
• H01H 50/22 - Movable parts of magnetic circuits, e.g. armature movable inside coil and substantially lengthwise with respect to axis thereofMovable parts of magnetic circuits, e.g. armature movable coaxially with respect to coil wherein the magnetic circuit is substantially closed

Abstract

A rotational operation type switch includes a frame; a rotational operation button rotatably supported on the frame for rotational operation; a switching contact mechanism disposed below the operation button to face the operation button; and an operation mechanism disposed between the operation button and the switching contact mechanism, to switch the switching contact mechanism in conjunction with the rotational operation of the operation button. The switching contact mechanism includes a printed circuit board, a plurality of fixed contact electrodes disposed on the printed circuit board and spaced a predetermined distance away from each other, and a movable contact having a disc spring shape and disposed bridging between the plurality of fixed contact electrodes. The movable contact deforms to contact and separate from the fixed contact electrodes and switches an electrical connection between the fixed contact electrodes.

IPC Classes  ?

• H01H 19/00 - Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
• H01H 21/00 - Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
• H01H 19/58 - Angularly-movable actuating part carrying contacts, e.g. drum switch having only axial contact pressure, e.g. disc switch, wafer switch
• H01H 19/48 - Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand the operating part having three operative positions, e.g. off/star/delta having only axial contact pressure
• H01H 19/63 - Contacts actuated by axial cams
• H01H 19/11 - Movable partsContacts mounted thereon with indexing means
• H01H 19/14 - Operating parts, e.g. turn knob
• H01H 19/635 - Contacts actuated by rectilinearly-movable member linked to operating part, e.g. by pin and slot
• H01H 1/24 - Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting

Abstract

This invention provides an electromagnetic contact apparatus wherein a mobile plunger and a mobile contactor are operated stably during a release operation. This electromagnetic contact apparatus (1) comprises: a contact point mechanism (2) having a pair of fixed contactors (23, 24) and a mobile contactor (25) capable of establishing contact with and separating from the pair of fixed contactors (23, 24); an electromagnet unit (3) for driving the contact point mechanism (2), having a mobile plunger (35) coupled to the mobile contactor (25) through a coupling shaft (37); and a hermetically sealed housing chamber (4) housing the contact point mechanism (2), the coupling shaft (37), and the mobile plunger (35). The housing chamber (4) is constituted in such a manner that a contact point mechanism housing space (A), which houses the contact point mechanism (2), and a mobile plunger housing space (B), which houses the mobile plunger (35), are partitioned by a partitioning member (10), which the coupling shaft (37) is passed through. The partitioning member (10) is provided with a communicating portion (11a) wherethrough the contact point mechanism housing space (A) and the mobile plunger housing space (B) communicate.

IPC Classes  ?

• H01H 50/54 - Contact arrangements
• H01H 50/20 - Movable parts of magnetic circuits, e.g. armature movable inside coil and substantially lengthwise with respect to axis thereofMovable parts of magnetic circuits, e.g. armature movable coaxially with respect to coil

Abstract

This terminal structure for a circuit breaker is provided with the following: a terminal fitting (35) held by housings (1, 2) of the circuit breaker; a connection space (36) provided in the terminal fitting (35); connection parts (41, 42) that electrically connect a round crimped terminal (33) which has been inserted into the connection space (36) to a terminal contact part (35a) provided at the terminal fitting (35); and slip-out-prevention parts (39, 43) that prevent the round crimped terminal (33) from slipping out of the connection space (36).

IPC Classes  ?

• H01H 73/20 - TerminalsConnections
• H01H 73/02 - Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism Details
• H01R 4/48 - Clamped connectionsSpring connections using a spring, clip or other resilient member
• H02B 1/40 - Wall-mounted casingsParts thereof or accessories therefor

Abstract

The present invention provides a stable operational amplifier having an enhanced frequency characteristic and also provides a charge amplifier using the same. An operational amplifier comprises: first and second push-pull circuits (11), (12) connected in parallel between positive and negative power supply lines; first and second current/voltage conversion circuits (13), (14) to which the higher potential sides of the first and second push-pull circuits (11), (12) are connected and which are connected to the positive power supply line; third and fourth current/voltage conversion circuits (15), (16) to which the lower potential sides of the first and second push-pull circuits are connected and which are connected to the negative power supply line; a first output stage (17) to which the output sides of the first and third current/voltage conversion circuits are connected; a second output stage (18) to which the output sides of the second and fourth current/voltage conversion circuits are connected; and an final output stage (19) in which bipolar transistors having the same polarity are connected between the positive power supply line and the negative power supply line. An output from the first output stage is supplied to the base of the transistor on the higher potential side of the final output stage, while an output from the second output stage is supplied to the bases of the transistors on the lower potential side of the final output stage.

IPC Classes  ?

• H03F 3/45 - Differential amplifiers
• H03F 3/70 - Charge amplifiers

Abstract

In an electromagnetic contactor, an arc generated when a movable contact separates from fixed contacts can be easily extinguished. The movable contact is disposed so as to be connectable to and detachable from the pair of fixed contacts disposed to maintain a predetermined interval inside a contact housing case having insulating properties, and an arc extinguishing chamber is formed in a position in which the movable contact and the pair of fixed contacts contact. At least the inner wall surface side of the arc extinguishing chamber contacting an arc is formed of a high thermal conductivity material having thermal conductivity higher than that of a synthetic resin molded material.

IPC Classes  ?

• H01H 50/38 - Part of main magnetic circuit shaped to suppress arcing between the contacts of the relay
• H01H 50/54 - Contact arrangements
• H01H 50/12 - VentilatingCoolingHeating
• H01H 50/02 - BasesCasingsCovers

Abstract

Provided are the following: an operational amplifier that does not detract from speed performance, that is a high-impedance input type, and that can reduce generated noise; and a charge amplifier that uses the operational amplifier. In the present invention, the following are provided: a first buffer (11) and a second buffer (12) that are disposed in parallel and that each have bipolar transistors which are connected so as to be complementary and in which emitters are mutually connected, and that have biasing diodes; a resistor (Re) that, between the buffers, is connected between the connection points between the emitters; a first current-to-voltage conversion circuit (13) and a second current-to-voltage conversion circuit (14) that connect the first and second buffers to a positive electrode power-source line and a negative electrode power-source line; first and second connection-type field effect transistors (Q15, Q25) that control the current flowing in the diodes; and an output stage (15) that is connected to the output of the first and second current-to-voltage conversion circuits. The gate of the first and the gate of the second connection-type field effect transistor serves as an input terminal.

IPC Classes  ?

• H03F 3/45 - Differential amplifiers
• H03F 3/70 - Charge amplifiers

Abstract

This invention provides a DC-operated polarized electromagnet in which the magnetic flux density between a plunger and an outer yoke is made uniform, improving the efficiency of the electromagnet. This invention also provides an electromagnetic contactor using said DC-operated polarized electromagnet. This DC-operated polarized electromagnet contains a plunger (21) to which armatures (23, 24) for a spool (11) that has a central opening (12) around which an excitation coil (16) is wound are attached individually, an outer yoke (31) that encloses opposing side surfaces of the spool so as to attract the first armature (23), an inner yoke (41) that is laid out inside the outer yoke so as to attract the second armature (24), and a permanent magnet (51) positioned between the outer yoke and the inner yoke. The outer yoke (31) is made thicker than the inner yoke (41), reducing magnetoresistance and dispersing concentrated magnetic flux in the plunger (21) to the outer yoke (31).

IPC Classes  ?

• H01H 50/36 - Stationary parts of magnetic circuit, e.g. yoke
• H01F 7/122 - Guiding or setting position of armatures, e.g. retaining armatures in their end position by permanent magnet
• H01F 7/16 - Rectilinearly-movable armatures

Abstract

This invention provides an electromagnetic contactor in which a shock-absorbing member and a frame are formed as a single unit, thereby producing a shock-absorption effect with a reduced number of components. Said electromagnetic contactor is provided with a first frame (11A) and a second frame (11B). An electromagnet (12) for operating the electromagnetic contactor is contained inside the first frame (11A), and a coil terminal (25) that energizes the coil of said electromagnet (12) is formed on the first frame (11A) so as to protrude from a side surface thereof. A contact mechanism that has an auxiliary contact is contained inside the second frame (11B), which has a power-supply-side terminal (32a) on one side thereof and a load-side terminal (32b) on the other side thereof. A snap-fit (37) that allows the second frame (11B) to be attached to the first frame (11A) in either a normal-direction connection state in which the coil terminal (25) and the power-supply-side terminal (32a) face the same direction or a reverse-direction connection state in which the coil terminal (25) and the load-side terminal (32b) face the same direction is formed on the first frame (11A) and the second frame (11B).

IPC Classes  ?

• H01H 50/04 - Mounting complete relay or separate parts of relay on a base or inside a case

Abstract

This invention provides a rail attachment apparatus for an electrical device. In said rail attachment apparatus, a slider itself is provided with biasing elasticity, making it possible to make said slider thinner and reduce the number of components. This rail attachment apparatus includes the following: a clamp (33a) that clamps onto one edge of an attachment rail (30) that is fixedly formed on an attachment surface of an electrical device; and a slider (40) that faces said clamp (33a) and is held on the other edge of the attachment rail (30) so as to be able to slide in a direction that intersects the attachment rail (30). Curved elastic parts (43a, 43b) that bias the slider (40) in the direction that makes the slider (40) clamp onto the attachment rail (30) tightly are formed as integral parts of the slider (40).

IPC Classes  ?

• H01H 45/04 - Mounting complete relay or separate parts of relay on a base or inside a case
• H01H 50/04 - Mounting complete relay or separate parts of relay on a base or inside a case
• H05K 7/12 - Resilient or clamping means for holding component to structure

Abstract

A polarized DC electromagnet device that is made easier to assemble without being increased in size is provided, as is an electromagnetic contactor that uses said polarized DC electromagnet device. This invention contains the following: a plunger (21) that has a first armature (23) and a second armature (24) joined to the ends thereof and passes through the tubular part (12) of a spool (11) around which an excitation coil (14) is wound; an outer yoke (31) that attracts the first armature and the second armature; an inner yoke (41) that is laid out inside the outer yoke (31) and attracts the second armature (24); and a permanent magnet (51) positioned between the outer yoke and the inner yoke. The spool (11) is provided with radially protruding flanges (13a and 13b) formed on the ends of the tubular part of the spool (11), a coil-terminal attachment part (15) formed on the first-armature-side flange (13a), and a coil terminal (17) attached to said coil-terminal attachment part.

IPC Classes  ?

• H01H 50/44 - Magnetic coils or windings

Abstract

A switch device includes an operation unit having a pushbutton for performing a pushing operation; a switch unit separably joined to the operation unit, the switch unit including an opening-closing contact mechanism opened or closed in conjunction with the pushing operation of the pushbutton of the operation unit, and a rotary drive plate rotating between a standby position and a usage position; and an engagement portion engaging the operation unit to the rotary drive plate to rotary-drive the rotary drive plate from the standby position to the usage position when the operation unit is attached to the switch unit. The operation unit is detached from or attached to the switch unit to set the opening-closing contact mechanism in respectively predetermined opening-closing states.

IPC Classes  ?

• H01H 3/62 - Lubricating means structurally associated with the switch
• H01H 25/00 - Switches with compound movement of handle or other operating part
• H01H 3/02 - Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
• H01H 13/62 - Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member the contact returning to its original state upon manual release of a latch
• H01H 13/14 - Operating parts, e.g. push-button

Abstract

Provided is an electromagnetic contact device allowing an alternating current electromagnet and a direct current electromagnet to be coupled to a contact support that is common to both. The device comprises: an electromagnet (12) constituted from either an alternating current electromagnet (12AC) having a mobile core or a direct current electromagnet (12DC) having an armature; and a contact support (36), which holds aligned a plurality of mobile contacts that are coupled to and driven by the electromagnet. Formed on the contact support is a coupling portion (40) constituted from a mobile core contact portion (41), a coupling spring front-end housing portion (46), and an armature contact portion (51) formed on the opposite side of the coupling spring front-end housing portion from the mobile core contact portion. The alternating current electromagnet (12AC) has an alternating current electromagnet coupling spring (56) inserted into a through-hole formed on the mounting surface side of the mobile core. The direct current electromagnet (12DC) has a direct current electromagnet coupling spring (161) disposed on the contact surface of the armature that contacts the armature contact portion.

IPC Classes  ?

• H01H 50/20 - Movable parts of magnetic circuits, e.g. armature movable inside coil and substantially lengthwise with respect to axis thereofMovable parts of magnetic circuits, e.g. armature movable coaxially with respect to coil

Abstract

This invention provides an electromagnetic contactor in which exacerbation of vibration by wear of snap-fit parts that connect a first frame and a second frame is minimized. Said electromagnetic contactor is provided with a first frame (11A), a second frame (11B), and snap-fit parts (37). The first frame (11A) contains an electromagnet for operating the electromagnetic contactor, and the second frame (11B) contains a contact mechanism. The snap-fit parts (37) comprise the following: an engagement protrusion (36) formed on either the first frame or the second frame; and a hook (26) that is formed on the other frame and engages with the engagement protrusion (36). Said hook (26) comprises the following: a flexible protruding plate (26a) that is formed on the open end of the first frame or the second frame so as to protrude therefrom; and an engagement section (26b) that is formed on the tip of said flexible protruding plate and engages with the aforementioned engagement protrusion (36). The flexible protruding plate (26a) is provided with elasticity so as to make the engagement section (26b) engage more deeply with the engagement protrusion (36) as wear between the engagement section (26b) and the engagement protrusion (36) progresses.

IPC Classes  ?

• H01H 50/02 - BasesCasingsCovers

Abstract

This invention provides an electromagnetic contactor in which a movable core for an AC electromagnet and a contact support can be connected together robustly without causing orientation deviations. Said electromagnetic contactor contains the following: the aforementioned AC electromagnet (12AC), which has a fixed core (12F) and the aforementioned movable core (12M); the aforementioned contact support (36), which holds a plurality of movable contacts (35) in a line; and a connecting spring (56) that connects the movable core of the AC electromagnet to the contact support. The connecting spring comprises the following: a movable-core contact plate (56a) that passes through a through-hole (55) formed in the movable core and contacts the contact-support side of said through-hole; and a pair of curved plates (56b) that are connected to the ends of the movable-core contact plate and are accommodated inside a connecting-spring-tip accommodation section formed in the contact support. The side opposite a contact surface of the movable-core contact plate contacts the aforementioned curved plates. A concavity (56d) that protrudes away from the contact support is formed in the movable-core contact plate (56a) in a direction that intersects the lengthwise direction thereof, and two contact sections (56e and 56f) that individually contact the abovementioned through-hole are formed on either side of said concavity.

IPC Classes  ?

• H01H 50/30 - Mechanical arrangements for preventing or damping vibration or shock, e.g. by balancing of armature