The present invention provides a unidirectional damper disposed inside the motor of a coreless window curtain. The coreless window curtain comprises an upper beam, a lower beam, and a plurality of slats serially connected between the upper beam and the lower beam through several releasing and winding straps. The motor is disposed inside the lower beam and is connected with the releasing and winding straps to control the movement of the releasing and winding straps and to keep the horizontal level of the lower beam. Through an elastic force, the releasing and winding straps can be smoothly released or winded up, and the lower beam can stop at any position. The unidirectional damper is disposed inside the motor to enhance the braking power of the motor.
An adjustable resistance tail plug includes a fixed seat, an adjusting wheel, a sleeve, a screw rod unit, an outer casing, a friction wheel and a clutch spring. The friction wheel engages threadably the screw rod unit, and is driven by the sleeve to move relative to the outer casing, so as to adjust a friction force between the outer casing and the friction wheel. The clutch spring is switchable between a contracted state and an expanded state. When in the contracted state, the clutch spring is tightened to abut against the second circumferential surface so that the sleeve is prevented from rotating relative to the fixed seat by the clutch spring. When in the expanded state, the clutch spring releases the second circumferential surface, and the adjusting wheel is rotatable with the sleeve through the clutch spring.
BEAUTIFUL WINDOW FASHIONS CO., LTD. (Taiwan, Province of China)
Inventor
Huang, Szu-Chang
Abstract
The present invention discloses a safety venetian blind including an upper groove, a bottom beam, and a plurality of slats disposed between the upper groove and the bottom beam. A first driving device is disposed in the upper groove for driving the slats to rotate via a ladder tape connected with the slats. A second driving device is disposed in the upper groove for driving the bottom beam to move up and down via a lift string connected with the bottom beam so that the slats are closed and opened. The lift string passes through the slats. The slats has at least two string loops respectively provided at opposite sides of one of the slats, and a first side portion of each of the string loops is fixed with the cord while a second side portion of each of the string loops wraps the lift string for at least one loop.
A cellular shade includes a head rail unit, an intermediate rail unit, a bottom rail unit, a blind body and a magnetically attractive unit. The head rail unit includes a head rail and a lower mounting bracket. The intermediate rail unit includes an intermediate rail and an upper mounting bracket. The magnetically attractive unit includes a first housing mounted on the lower mounting bracket, a second housing mounted on the upper mounting bracket, and a magnet mounted on one of the first and second housings. The other one of the first and second housings is magnetically attractive with the magnet. The first housing includes a first positioning member to be retainingly positioned to the lower mounting bracket. The head rail unit and the intermediate rail unit can be firmly secured to each other by means of the magnetically attractive unit so as to prevent light leaking.
A window blind assembly includes a frame, an input shaft rotatably disposed in the frame, a blind unit, a winding unit for placing the blind unit in a retracted state when the input shaft is rotated in a first rotational direction and for shifting the blind unit to an expanded state when the input shaft is rotated in a second rotational direction, a control unit operable to drive rotation of the input shaft in the first and second rotational directions, a force-assisting unit having a spring capable of exerting a spring force on the control unit to resist the weight of the blind unit acting thereon, and a brake unit connected to the input shaft and generating a frictional force to resist rotation of the input shaft in the second rotational direction.
A cord-resistance adjusting device for a venetian blind includes limiting blocks disposed in a casing unit containing a scroll spring and cord reels. Each of two side casing parts of the casing unit has inner and outer limiting columns mounted thereinside. Each limiting block is movably disposed in the respective side casing part between the inner and outer limiting columns. A lift cord bends around and frictionally contacts the respective limiting block when moving from the inner limiting column to the outer limiting column.
A driving device includes a mounting frame, a driving rod, a driving gear, a worm, primary and auxiliary input members, and a reduction gear train. The mounting frame is connected to a frame unit. The driving rod is connected to a blind unit and is rotatable about a first axis. The driving gear is connected to the driving rod. The primary input member is rotatable about a second axis. The worm is connected to the primary input member and meshes with the driving gear. The auxiliary input member is rotatable about the second axis. The reduction gear train is connected between the primary and auxiliary input members, such that rotation of the auxiliary input member drives the primary input member to rotate at a speed different from that of the auxiliary input member.
A window blind device includes a headrail, a bottomrail, a window shade, first and second control wheels, first and second cord spools, first and second cords, and a coil spring. The coil spring has a looped end portion sleeved on a first wheel hub of the first control wheel, and a spring body wound on the first wheel hub and extending from the looped end portion to terminate at a leading spring end which is connected to a second wheel hub of the second control wheel.
A includes upper and lower rails, a blind unit, a reel unit, mounted to the upper rail, two pull cords, a retarding unit mounted to the upper rail, and a ladder-string adjusting unit. The retarding unit includes two retarders each of which includes a bracket, a first retarding shaft mounted to a lateral wall of the bracket, and a rod member mounted to an end wall of the bracket. The ladder-string adjusting unit includes two ladder-string seats respectively mounted to the brackets of the retarders, a connecting rod interconnecting the ladder-string seats, and two ladder strings connected to the blind unit. Each of the ladder-string seats is located above the rod member and the first retarding shaft of the corresponding retarder.
A window blind device includes a headrail, a bottomrail, a window shade, a frame, and a plurality of control wheels. The frame includes two frame halves each including a wall body and a plurality of shaft halves. When the frame halves are brought into mating engagement with each other, male and female connecting regions of each of the shaft halves of each of the frame halves matingly fit with the female and male connecting regions of a corresponding one of the shaft halves of the other one of the frame halves, respectively.
A retarding device is used to retard movement of a cord of a window shade. The retarding device includes a support frame and a retarding unit. The support frame includes a base part having a base slot formed therethrough, and a side plate disposed at one side of the base part and having a securing portion formed therethrough. The retarding unit includes a cord retarding module, and a rod member disposed at the base slot. The cord retarding module has a mounting seat secured to the securing portion, and a retarding shaft rotatably supported on the mounting seat. The rod member and the retarding shaft are parallel to each other and extend in a longitudinal direction.
A cord winding device for a Venetian blind includes a receiving unit, a resilient driving unit mounted in the receiving unit, a braking unit mounted in the receiving unit and adjacent to the resilient driving unit, and a unidirectional damping unit mounted in the receiving unit. Through cooperation between the braking unit and the resilient driving unit, during winding and unwinding of pull cords, a bottom rail can be descended slowly and stopped conveniently at any desired height.
A cord-winding device for a Venetian blind includes: a first reel; a driving unit including a driving wheel and a spring-winding wheel; and a brake unit including a driven gear, a driving member, a ratchet wheel sleeved on the driving member, a plurality of friction members disposed between the driving member and the ratchet wheel, and at least pawl biased to engage the ratchet wheel. When the driven gear is driven by the first reel to rotate in a direction, rotation of the ratchet wheel is stopped by the pawl so that the driving member drives the friction members to rotate, and when the driven gear is driven by the driving wheel to rotate in an opposite direction, the driving member drives rotation of the friction members and, thus, the ratchet wheel.
A one-way damper unit of a pull cord device includes a unidirectional clutch that is disposed in a housing to form a liquid-filled gap therewith and that includes: a casing formed with deep and shallow groove portions; a main shaft having an insert segment extending into the casing and a connecting segment extending outwardly of the casing for connecting to a driven wheel; and a clutching member including a clutching body that extends into the groove and that has a cross-sectional dimension shorter than a distance between the insert segment and the deep groove portion, and longer than a distance between the insert segment and the shallow groove portion.
An apparatus for making blind slats includes: a feeding unit adapted to feed a pulp fiber web; an impregnation tank containing an impregnating liquid for impregnating the pulp fiber web; a conveying roller assembly disposed within said impregnation tank for immersing and conveying the pulp fiber web through the impregnating liquid; and a thermal forming unit for thermal forming the pulp fiber web that has been impregnated.
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