Masunaga Optical Mfg. Co., Ltd.

Japan

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IPC Class
G02C 5/00 - Constructions of non-optical parts 4
G02C 5/22 - Hinges 3
G02C 1/00 - Assemblies of lenses with bridges or browbars 2
G02C 5/16 - Side-members resilient or with resilient parts 2
G02C 1/06 - Bridge or browbar secured to, or integral with, closed rigid rims for the lenses 1
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NICE Class
09 - Scientific and electric apparatus and instruments 4
21 - HouseHold or kitchen utensils, containers and materials; glassware; porcelain; earthenware 1
35 - Advertising and business services 1

1.

MASUNAGA

      
Application Number 1906250
Status Registered
Filing Date 2025-11-19
Registration Date 2025-11-19
Owner Masunaga Optical Mfg. Co., Ltd. (Japan)
NICE Classes  ?
  • 09 - Scientific and electric apparatus and instruments
  • 35 - Advertising and business services

Goods & Services

Eyeglasses and their parts and attachments; sunglasses and their parts and attachments. Conducting retail and wholesale services relating to eyeglasses and their parts and attachments for the benefit of customers; conducting retail and wholesale services relating to sunglasses and their parts and attachments for the benefit of customers.

2.

MASUNAGA

      
Application Number 203201600
Status Registered
Filing Date 2020-06-04
Registration Date 2024-11-01
Owner MASUNAGA OPTICAL MFG. CO., LTD. (Japan)
NICE Classes  ? 09 - Scientific and electric apparatus and instruments

Goods & Services

(1) Eyeglasses (spectacles), spectacles frames, spectacles lenses, spectacles cases, spectacles holders, sunglasses, sunglasses frame, sunglasses cases, sunglasses holders.

3.

FRONT FRAME FOR EYEGLASSES HAVING ATTACHED RIM COVER

      
Application Number JP2015000120
Publication Number 2016/113773
Status In Force
Filing Date 2015-01-14
Publication Date 2016-07-21
Owner MASUNAGA OPTICAL MFG. CO.,LTD. (Japan)
Inventor Masunaga, Sotaro

Abstract

[Problem] To provide a front frame for eyeglasses having attached rim covers in which the thickness of the frame in the forward/rearward direction or in the rim outer/inner direction can be suppressed and a protruding portion of the lens is not easily damaged even when the eyeglasses are subject to a shock during use, while also being able to firmly fix the rim cover to the rim so that the rim cover does not come off over a long period of time. [Solution] There is provided a front frame for eyeglasses having attached rim covers in which left and right rims 1, 1 having rim grooves 11, 11 into which protruding portions of the outer peripheries of lenses L are inserted, are inserted in and integrated together with fitting grooves 21, 21 of the rim covers 2, 2, wherein insertion holes 12, 22 communicating in the rim outer/inner direction while the rim 1 is fitted on the rim cover 2, are respectively provided in the rim 1 and the rim cover 2, and a shaft section of a rivet 3 is inserted from the outside of the rim cover 2 into the communicating insertion holes 12, 22, and furthermore the leading end part of the rivet 3 is crimped by plastic deformation and forms a plate-like crimped portion 32 along the bottom surface shape of the groove inside the rim groove 11 of the rim 1.

IPC Classes  ?

  • G02C 1/06 - Bridge or browbar secured to, or integral with, closed rigid rims for the lenses
  • G02C 13/00 - AssemblingRepairingCleaning

4.

GLASSES FRAME WITH SCREWLESS HINGES

      
Application Number JP2014006186
Publication Number 2016/092600
Status In Force
Filing Date 2014-12-12
Publication Date 2016-06-16
Owner MASUNAGA OPTICAL MFG.CO.,LTD. (Japan)
Inventor Masunaga, Satoru

Abstract

[Problem] To provide a glasses frame with screwless hinges that allows for unconventional frame design and that facilitates the exchange of worn-out parts and causes no problems even when using a plate-like temple member. [Solution] A glasses frame comprises: a front frame 1; plate-like temple members 2, 2 each having a window 21 formed in the side surface near the base end, a rotary shaft part 22 formed in a location near the base end of the frame enclosing the window 21, and protrusions 23, 23 formed at the top and the bottom of the rotary shaft part 22; a rotary slide member 3 formed into a synthetic resin or metal columnar part that has an axial groove 31 formed on a part of the peripheral surface thereof, the length of the columnar part corresponding to the length of the rotary shaft part 22 of the temple member 2, and the dimensions of the groove 31 corresponding to the dimensions of the rotary shaft part 22; and hinge members 4 formed into a tubular body having a hollow part 41 with a circular cross-section corresponding to the dimensions of the rotary slide member 3 with a base part 42 disposed as a part of the tubular body and an open slit 43 disposed in the peripheral surface of the base part 42 along the axial direction to communicate with the hollow part 41.

IPC Classes  ?

5.

FASTENING STRUCTURE FOR SPECTACLE COMPONENTS

      
Application Number JP2014005258
Publication Number 2016/059660
Status In Force
Filing Date 2014-10-16
Publication Date 2016-04-21
Owner MASUNAGA OPTICAL MFG. CO., LTD. (Japan)
Inventor Masunaga, Satoru

Abstract

[Problem] To provide a fastening structure for spectacle components whereby a plate-shaped component can be fastened without using screws or nuts, the fastened plate-shaped component can be prevented from becoming loose or falling due to shock or the like, and a fastening operation can be easily performed without a tool. [Solution] A fastening structure for spectacle components comprises: a locking claw that provides a male-side locking part formed in a first spectacle component and that is formed of a pair of plate-shaped pieces having a protrusion on the outer side at the tip and being forked into two branches while disposed side by side in a plate width direction; an insertion slot or an insertion hole that provides a female-side locking part formed in a second spectacle component 2 and that has a shape corresponding to the locking claw 11; and a press-fit member 3 that is made of synthetic resin or metal and that is inserted in a wide-width portion of the insertion slot or the insertion hole.

IPC Classes  ?

6.

SPECTACLE FRAME AND TEMPLE MEMBER FOR SPECTACLE FRAME

      
Application Number JP2013000641
Publication Number 2014/122687
Status In Force
Filing Date 2013-02-06
Publication Date 2014-08-14
Owner MASUNAGA OPTICAL MFG. CO., LTD. (Japan)
Inventor Masunaga, Satoru

Abstract

[Problem] To provide a spectacle frame and a temple member for a spectacle frame, in which a decline in the strength of an elastic member is not prone to occur even when spectacles are used for a long time, and in which differences in user head size do not cause significant irregularity of fit during wear. [Solution] A left-right pair of temple members provided with ear hanging parts for making contact with temporal parts of the head of a wearer at rear-end parts thereof, front-end parts of the temple members being connected to both ends of a front frame, wherein a temple body is configured from a leaf spring part formed on a front frame side, and a high-rigidity part having a higher flexural rigidity than the leaf spring part and formed so as to include the hear hanging part to the rear of the leaf spring part, while the leaf spring part is formed so that the width thereof in the up-down direction is constant, or so as to have a tapered shape in which the width thereof in the up-down direction decreases by a predetermined ratio from the front side to the rear side thereof, and is formed so that the thickness of the leaf spring part satisfies a predetermined numeric expression with regard to the relationship of the width of the leaf spring part in the up-down direction, a position in the length direction, and the position along the high-rigidity part (12) at which contact is made with the temporal region of the head.

IPC Classes  ?

  • G02C 5/16 - Side-members resilient or with resilient parts

7.

Spectacles frame and temple members of the same

      
Application Number 14170154
Grant Number 08894199
Status In Force
Filing Date 2014-01-31
First Publication Date 2014-08-07
Grant Date 2014-11-25
Owner Masunaga Optical Mfg. Co., Ltd. (Japan)
Inventor Masunaga, Satoru

Abstract

A pair of spectacles is provided, wherein a temple main body includes a plate spring section formed to a side of the front frame; and a highly rigid section formed to a rear side of the plate spring section with the ear suspension section inclusive and having bending rigidity higher than that of the plate spring section while the plate spring section is formed in such a manner that its vertical width is rendered constant or tapered with narrowed by a predetermined ratio from its frontal side to its rear side as well as such that a thickness of the plate spring section satisfies the predetermined equation in relation with vertical widths of the plate spring section, positions in a longitudinal direction thereof and an abutment position with the lateral side of the head at the highly rigid section.

IPC Classes  ?

  • G02C 5/16 - Side-members resilient or with resilient parts

8.

HIGHLY ELASTIC FRONT FRAME FOR EYEWEAR

      
Application Number JP2012005077
Publication Number 2014/024223
Status In Force
Filing Date 2012-08-09
Publication Date 2014-02-13
Owner MASUNAGA OPTICAL MFG. CO., LTD. (Japan)
Inventor Masunaga, Satoru

Abstract

[Problem] To provide a highly elastic front frame for eyewear which, without sacrificing the fit and durability of a plastic frame using highly elastic resin, is able to keep the lenses from falling out and outer appearance from deteriorating when the temples are being opened, and also allows a high degree of design flexibility. [Solution] A highly elastic front frame for eyewear includes: a full-rim or half-rim front frame (1) formed from a highly elastic resin material having a flexural modulus of 4000 MPa or less and a flexural strength of 70 MPa or more; and reinforcing core members (2) which have a larger flexural stiffness than the rims (11, 11) of the front frame (1) and are partially inserted into the right and left rims (11, 11) immediately above the lens (L, L). When the right and left temples (T, T) connected to both sides of the front frame (1) are opened, the bridge (12) and the end pieces (13, 13) of the front frame (1) bend while the inserted reinforcing core members (2, 2) keep the rims (11, 11) from elastically deforming.

IPC Classes  ?

  • G02C 5/00 - Constructions of non-optical parts

9.

FITTED HINGE-TYPE EYEGLASS FRAME

      
Application Number JP2012003577
Publication Number 2013/179343
Status In Force
Filing Date 2012-05-31
Publication Date 2013-12-05
Owner MASUNAGA OPTICAL MFG. CO., LTD. (Japan)
Inventor Masunaga, Satoru

Abstract

[Problem] To provide a fitted hinge-type eyeglass frame with which it is possible to make a lighter-weight front frame, there is no concern about a significant load being applied in a twist direction on the rims or the lenses even if a rim lock is not present, and moreover, is easy to fabricate and has a high degree of freedom in frame design. [Solution] Provided is an eyeglass frame formed from a thin metal plate, and configured to comprise a front frame (1) further comprising a spilt endpiece (B-B) which is spilt vertically into two pieces; and temples (2-2) which are hinge coupled to the spilt endpiece (B) of the front frame (1). An upper side female hinge piece (13a) and a lower side female hinge piece (13a') are formed in alignment in vertical holding parts (13-13) of the split endpiece (B), and exterior side portions (P-P') and interior side portions (Q-Q') are respectively formed in each of the female hinge pieces (13a-13a'). Conversely, positioning a base end face of the temple (2) in a location of abutting the interior side portions (Q-Q') of the female hinge pieces (13-13') when the temple (2) is opened outward allows constraining the outward opening of the temple (2) by the interior side parts (Q-Q').

IPC Classes  ?

10.

RIM LOCK STRUCTURE OF EYEGLASS FRAME AND METHOD FOR MANUFACTURING THE SAME

      
Application Number JP2009062751
Publication Number 2011/007421
Status In Force
Filing Date 2009-07-14
Publication Date 2011-01-20
Owner MASUNAGA OPTICAL MFG. CO., LTD. (Japan)
Inventor Masunaga Satoru

Abstract

The rim lock structure of an eyeglass frame comprises, in eyeglasses provided with a thin-sheet frame, an upper projection piece and a lower projection piece formed to extend from the respective ends of an upper rim and a lower rim, an armor attaching portion formed continuously, through a U-bend, at a coupling piece which is formed to extend from the end of the upper rim in parallel with the upper projection piece, an engaging portion formed to extend from the end of a lower rim in parallel with the lower projection piece, and a member for coupling the upper projection piece with lower projection piece.  A method for manufacturing the rim lock structure of an eyeglass frame comprises a step for cutting out a frame body and a rim lock structure continuous thereto from one thin plate, a step for bending the frame body, a step for bending the rim lock structure, a step for separating the upper portion from the lower portion of the rim lock structure, and a step for boring the rim lock structure at the predetermined point thereof.

IPC Classes  ?

  • G02C 1/00 - Assemblies of lenses with bridges or browbars
  • G02C 5/00 - Constructions of non-optical parts

11.

masunaga

      
Application Number 002284685
Status Registered
Filing Date 2001-07-03
Registration Date 2002-08-06
Owner Masunaga Optical Mfg. Co., Ltd. (Japan)
NICE Classes  ? 09 - Scientific and electric apparatus and instruments

Goods & Services

Spectacles, spectacle frames, sunglasses, spectacle cases, spectacle holders, spectacle lenses.

12.

t

      
Application Number 001365071
Status Registered
Filing Date 1999-10-29
Registration Date 2000-11-16
Owner Masunaga Optical Mfg. Co., Ltd. (Japan)
NICE Classes  ?
  • 09 - Scientific and electric apparatus and instruments
  • 21 - HouseHold or kitchen utensils, containers and materials; glassware; porcelain; earthenware

Goods & Services

Spectacles, including sunglasses, spectacle frames, spectacle glasses, spectacle cases, spectacle holders. Cloths for cleaning spectacles.