WO1991014960A1 - Hinge for spectacles with endstop procured by means of an internal slider - Google Patents

Hinge for spectacles with endstop procured by means of an internal slider Download PDF

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Publication number
WO1991014960A1
WO1991014960A1 PCT/IT1990/000046 IT9000046W WO9114960A1 WO 1991014960 A1 WO1991014960 A1 WO 1991014960A1 IT 9000046 W IT9000046 W IT 9000046W WO 9114960 A1 WO9114960 A1 WO 9114960A1
Authority
WO
WIPO (PCT)
Prior art keywords
hinge
sphere
earpiece
spring
fork
Prior art date
Application number
PCT/IT1990/000046
Other languages
French (fr)
Inventor
Angela Bertuzzi
Original Assignee
Angela Bertuzzi
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Angela Bertuzzi filed Critical Angela Bertuzzi
Publication of WO1991014960A1 publication Critical patent/WO1991014960A1/en

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C5/00—Constructions of non-optical parts
    • G02C5/22—Hinges
    • G02C5/2218—Resilient hinges
    • G02C5/2227—Resilient hinges comprising a fixed hinge member and a coil spring
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C2200/00—Generic mechanical aspects applicable to one or more of the groups G02C1/00 - G02C5/00 and G02C9/00 - G02C13/00 and their subgroups
    • G02C2200/26—Coil spring pushed upon actuation

Definitions

  • the invention concerns a hinge for spectacles.
  • hinges for spectacles their purpose being to connect the eyeglass frames to the curved earpieces
  • These hinges consist of two components.
  • One component is fixed to the eyeglass frames and the other, the forked part, to the curved earpiece.
  • the three positions occupied by the earpieces are determined by a sphere, pressed by a spring, that slides within a longitudinal hole made in the fork, with a front mouth through which the sphere and the spring are put in.
  • the sphere pressed by the spring acts on a cam fixed to the hinge component sunk in the eyeglass frames.
  • the spring of a diameter less than that of the sphere, is » j housed in a cylindrical chamber rearward of the hole in which the sphere slides.
  • Said chamber's diameter is less than that of the hole and therefore less than that of the sphere.
  • the endstop to movement of the earpieces beyond a certain position is determined by the edge of the chamber rear of the hole i the fork where the sphere is obliged to stop.
  • the aperture of the frontward hole requires fork diameter to be relatively large. This is partly because the diameter of the sphere must be larger than that of the chamber hous ⁇ ing the spring which obviously must be of a certain size in order to function. Further, having the opening of the hole in which the sphere slides towards the front and therefore towards the eyeglass frames,means that part of the sphere is visible which is prejudicial to appearance.
  • the metal core inside the earpiece is fitted to the fork by simply inserting it in a recess in said fork.
  • the core is stablized, in relation to the fork,by the plastic material of the earpiece enveloping said pieces. Therefore, the high stresses, during wear, concentrated at the point of conjunction between metal core and fork, lead to breakages and warping.
  • the hinge component fixed into the eyeglass frames has a head with two diametral cuts in it at 90°. Being so close these cuts cannot be large and are therefore unable to produce the desired effects, namely to prevent rotation of said head round its axis.
  • the longitudinal hole in which the sphere glides is placed rearwards instead of frontwards.
  • the diameter of the spring is practically the same as that of the sphere .
  • the endstop to movement of the sphere to prevent the ear ⁇ pieces opening outward beyond a certain point is obtained by a cylindrical bar, of suitable length, coaxial to and inside, the spring, and placed between the sphere and the plug. Opening at the back of the plug there is a dead hole into which the usual core of the earpiece is pushed.
  • the component, to be fixed to the eyeglass frames and com ⁇ prising a head, which becomes enveloped in the material of said frames, and a cam, is made in one piece.
  • the head of said component has only one diametral cut in it.
  • the fork is cylindrical.
  • the fork is cylindrical and has two zones about equal in length but of different diameters.
  • the zone of greater diameter lies to the front and is cut by two parallel planes at a tangent to the cylindrical sur ⁇ face of the zone of smaller diameter, the recess, for in- sertion of the second part of the hinge, being perpendicular to said planes .
  • the diameter of said fork can be considerably smaller than is the case at present.
  • the cam can also be smaller to the advantage of both func ⁇ tional aspects of the spectacles and their appearance.
  • the fact that the core is forced inside the plug which in turn is fixed into the fork ensures maximum structural con ⁇ tinuity between fork and core.
  • Consequent structural continuity at one of the most sen ⁇ sitive points of the spectacles means greatly improved re ⁇ sistance to wear. Without affecting structural strength, a thinner and there ⁇ fore more elegant fork can be mounted, further improving elegance of the ear pieces and therefore of the spectacles as a whole .
  • Fig.1 Perspective of the spectacles with the hinge sub ⁇ ject of the invention.
  • Fig.2 The fork cut through longitudinally seen from the side.
  • Fig.3 Plan view of the fork.
  • Fig. The fork seen from the front.
  • Fig.6 Perspective view of the fork with enlarged zone towards the eyeglass frames.
  • Fig.9 The hinge component fixed into the eyeglass frames, side view.
  • FIG.10 Hipge component in Fig. 9 , front view.
  • FIG.12 Detail of the spectacles showing the hinge subject of the invention cut through longitudinally, with the earpiece in the "closed” position.
  • FIG.13 Detail of the spectacles seen in Fig. 12 with the earpiece in the "open” position.
  • FIG.14 Detail of the spectacles seen in Fig. 12 with the earpiece openened outward to the maximum.
  • the spectacles 10 in Fig. 1 comprise the eyeglass frame 1 I and the earpieces 12.
  • the earpieces 12 are connected to the eyeglass frame 11 by the hinge 13.
  • Said hinge 13 comprises two components: the fork 20 fixed to the earpiece and the component 40 that is fixed to the eyeglass frames 11.
  • the fork 20 comprises a cylindrical body 21 and a longitu- dinal hole 22 open at the rear.
  • the cylindrical plug 33 After mounting the sphere, the spring and the cylindrical bar, the cylindrical plug 33 is fixed inside the mouth 23 where it is made stable by caulking 15, its position being determined by the edge 27 of the hole 22 at the bottom of said mouth 23.
  • said plug 33 there is an axial blind hole 34 into which the core 14 is forced, said core penetrating inside the earpiece 12 of plastic material to give it extra strength.
  • the spring 31 keeps the sphere 30 towards the recess 24 communicating with the hole 22 already described.
  • Component 40 (Figs. 9 - 11) comprises the head 41 and the cam 42 inclined in relation to the axis of the head. There is a diametral cut 43 on the head. A hole 44 is made in the cam 42 to associate it to the com ⁇ ponent 20 by means of the screw 50 which,as already described, passes through the aligned holes 25 and 26.
  • the cam 42 has three determining zones: zone 45 is substantially parallel to the axis of the head and lies at the minimum distance from the transversal axis of the hole 44.
  • Said zone holds the earpiece 12 firm in its ordinary posi ⁇ tion when the spectacles are not worn, namely when the ear ⁇ pieces are lying practically parallel to the eyeglass frames (Fig. 12). Said position is brought about by impact of the sphere 30, pressed by the spring 31 against zone 45, already described, of the cam.
  • the earpiece 12 is opened to about 90° in relation to the plane of the eyeglass frames I I, as shown in Fig. 13.
  • Said position is stabilized by penetration of the sphere 30 within the recess 46.
  • zone 47 of the cam is made at the maximum distance from the axis of hole 44.
  • said zone 47 compels the sphere 30 to move the cylindrical bar 32 until it touches the plug 33 fitted in at the end of the cylindrical body 21.
  • Said bar 32 therefore fulfils the function of an endstop by preventing the earpiece 12 from opening beyond the po ⁇ sition indicated for it in said Fig. 14.
  • Figs. 5, 7, 8 show the various shapes and reciprocal posi ⁇ tions of all parts of the hinge.
  • the cylindrical body 21 can be replaced by a cylindrical body 35 divided into t o zones 36 and 37 of practically equal length but havin different diameters.
  • Zone 36 lies towards the eyeglass frames and is cut by two planes 38 38' parallel to its geometrical axis and practically tangential to the outer surface of zone 37.
  • part of the hinge nearest to the core 14 strengthening the earpiece can be made thinner or, al erna ively, the part where the cam of the hinge's second component is inserted can be s rengthened.

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Ophthalmology & Optometry (AREA)
  • Optics & Photonics (AREA)
  • Eyeglasses (AREA)
  • Drawing Aids And Blackboards (AREA)

Abstract

Hinge (13) for spectacles (10) with fork (20) comprising a longitudinal hole (22) for housing a spring (31) and a sphere (30) acting on a cam (42) to stabilize the curved earpiece (12) in its various positions, having a rear mouth (23) which, when the internal parts have been mounted, is closed by means of a plug (33) fitted with a seat into which fits the core (14) of the earpiece (12), the endstop to control opening of said earpiece consisting of a freely-moving cylindrical bar (32), coaxial with the spring (31) and interposed between the sphere (30) and the plug (33).

Description

HINGE FOR SPECTACLES WITH ENDSTOP PROCURED BY MEANS OF AN INTERNAL SLIDER
The invention concerns a hinge for spectacles. In everyday use are hinges for spectacles their purpose being to connect the eyeglass frames to the curved earpieces These hinges consist of two components.
One component is fixed to the eyeglass frames and the other, the forked part, to the curved earpiece. The three positions occupied by the earpieces, these being the folded position with the earpieces lying over the eye¬ glass frames, the position when the spectacles are worn and the earpieces are at about 90° in relation to the front frames, and the position when the earpieces are opened as wide as they can go, are determined by a sphere, pressed by a spring, that slides within a longitudinal hole made in the fork, with a front mouth through which the sphere and the spring are put in.
The sphere pressed by the spring acts on a cam fixed to the hinge component sunk in the eyeglass frames. The spring, of a diameter less than that of the sphere, is » j housed in a cylindrical chamber rearward of the hole in which the sphere slides.
Said chamber's diameter is less than that of the hole and therefore less than that of the sphere. The endstop to movement of the earpieces beyond a certain position is determined by the edge of the chamber rear of the hole i the fork where the sphere is obliged to stop. The aperture of the frontward hole requires fork diameter to be relatively large. This is partly because the diameter of the sphere must be larger than that of the chamber hous¬ ing the spring which obviously must be of a certain size in order to function. Further, having the opening of the hole in which the sphere slides towards the front and therefore towards the eyeglass frames,means that part of the sphere is visible which is prejudicial to appearance. The metal core inside the earpiece is fitted to the fork by simply inserting it in a recess in said fork.
The core is stablized, in relation to the fork,by the plastic material of the earpiece enveloping said pieces. Therefore, the high stresses, during wear, concentrated at the point of conjunction between metal core and fork, lead to breakages and warping.
The hinge component fixed into the eyeglass frames has a head with two diametral cuts in it at 90°. Being so close these cuts cannot be large and are therefore unable to produce the desired effects, namely to prevent rotation of said head round its axis.
The above invention eliminates or lessens these drawbacks as will be explained below. According to the invention the longitudinal hole in which the sphere glides is placed rearwards instead of frontwards. The diameter of the spring is practically the same as that of the sphere .
When the sphere and the spring have been put in, a cylin¬ drical plug is fitted into the mouth of the above hole and the spring presses against said plug.
The endstop to movement of the sphere to prevent the ear¬ pieces opening outward beyond a certain point is obtained by a cylindrical bar, of suitable length, coaxial to and inside, the spring, and placed between the sphere and the plug. Opening at the back of the plug there is a dead hole into which the usual core of the earpiece is pushed. The component, to be fixed to the eyeglass frames and com¬ prising a head, which becomes enveloped in the material of said frames, and a cam, is made in one piece.
The head of said component has only one diametral cut in it. The fork is cylindrical.
The plug is held in place by caulking during which the edge of the hole, into which the plug is pushed, is bent back over this latter forming a kind of ring-shaped cover which helps to improve the appearance of the specLacles. In another execution the fork is cylindrical and has two zones about equal in length but of different diameters. The zone of greater diameter lies to the front and is cut by two parallel planes at a tangent to the cylindrical sur¬ face of the zone of smaller diameter, the recess, for in- sertion of the second part of the hinge, being perpendicular to said planes .
The advantages of the invention are evident.
Since aperture of the fork's longi udinal hole is rearward and the external diameters of the spring and of the sphere are the saπ^e, the diameter of said fork can be considerably smaller than is the case at present.
The cam can also be smaller to the advantage of both func¬ tional aspects of the spectacles and their appearance. The fact that the core is forced inside the plug which in turn is fixed into the fork ensures maximum structural con¬ tinuity between fork and core.
Consequent structural continuity at one of the most sen¬ sitive points of the spectacles means greatly improved re¬ sistance to wear. Without affecting structural strength, a thinner and there¬ fore more elegant fork can be mounted, further improving elegance of the ear pieces and therefore of the spectacles as a whole .
Characteris ics and purposes of the invention will be made even clearer by the following examples of its execution illustrated by diagrammatic figures.
Fig.1 Perspective of the spectacles with the hinge sub¬ ject of the invention.
Fig.2 The fork cut through longitudinally seen from the side.
Fig.3 Plan view of the fork.
Fig. The fork seen from the front.
Fig.5 Exploded view in perspective of fork and hinge.
Fig.6 Perspective view of the fork with enlarged zone towards the eyeglass frames.
Fig.7 Longitudinal section of the fork.
Fig.8 Longitudinal section of the plug to close the length¬ wise hole made in the fork.
Fig.9 The hinge component fixed into the eyeglass frames, side view.
Fig.10 Hipge component in Fig. 9 , front view.
». Fig.11 Hinge component in Fig. 9, plan view.
Fig.12 Detail of the spectacles showing the hinge subject of the invention cut through longitudinally, with the earpiece in the "closed" position.
Fig.13 Detail of the spectacles seen in Fig. 12 with the earpiece in the "open" position.
Fig.14 Detail of the spectacles seen in Fig. 12 with the earpiece openened outward to the maximum. The spectacles 10 in Fig. 1 comprise the eyeglass frame 1 I and the earpieces 12.
The earpieces 12 are connected to the eyeglass frame 11 by the hinge 13. Said hinge 13 comprises two components: the fork 20 fixed to the earpiece and the component 40 that is fixed to the eyeglass frames 11.
The fork 20 comprises a cylindrical body 21 and a longitu- dinal hole 22 open at the rear.
Close to said opening there is a cylindrical mouth 23 the diameter of which is greater than that of the hole 22. Inside the hole 22 are placed the sphere 30, the helical compression spring 31 and the cylindrical bar 32. In the cylindrical body 21 there is a frontal cut 24 in which is inserted the element connecting it to the second component 40 as will be described further on. Connection to this second component is made by the screw 50 (Figs. 1 and 5) that passes through the hole 25 and screw into the coaxial threaded hole 26.
After mounting the sphere, the spring and the cylindrical bar, the cylindrical plug 33 is fixed inside the mouth 23 where it is made stable by caulking 15, its position being determined by the edge 27 of the hole 22 at the bottom of said mouth 23.
In said plug 33 there is an axial blind hole 34 into which the core 14 is forced, said core penetrating inside the earpiece 12 of plastic material to give it extra strength.
As can be seen in Fig. 2, the spring 31 keeps the sphere 30 towards the recess 24 communicating with the hole 22 already described.
Component 40 (Figs. 9 - 11) comprises the head 41 and the cam 42 inclined in relation to the axis of the head. There is a diametral cut 43 on the head. A hole 44 is made in the cam 42 to associate it to the com¬ ponent 20 by means of the screw 50 which,as already described, passes through the aligned holes 25 and 26. The cam 42 has three determining zones: zone 45 is substantially parallel to the axis of the head and lies at the minimum distance from the transversal axis of the hole 44.
Said zone holds the earpiece 12 firm in its ordinary posi¬ tion when the spectacles are not worn, namely when the ear¬ pieces are lying practically parallel to the eyeglass frames (Fig. 12). Said position is brought about by impact of the sphere 30, pressed by the spring 31 against zone 45, already described, of the cam.
To make normal use of the spectacles, the earpiece 12 is opened to about 90° in relation to the plane of the eyeglass frames I I, as shown in Fig. 13.
Said position is stabilized by penetration of the sphere 30 within the recess 46.
The prevent the earpiece opening beyond the farthest posi¬ tion shown in Fig. 14, zone 47 of the cam is made at the maximum distance from the axis of hole 44.
As may be se'en from Fig. 14, said zone 47 compels the sphere 30 to move the cylindrical bar 32 until it touches the plug 33 fitted in at the end of the cylindrical body 21. Said bar 32 therefore fulfils the function of an endstop by preventing the earpiece 12 from opening beyond the po¬ sition indicated for it in said Fig. 14.
Figs. 5, 7, 8 show the various shapes and reciprocal posi¬ tions of all parts of the hinge. In another execution shown in Fig. 6, the cylindrical body 21 can be replaced by a cylindrical body 35 divided into t o zones 36 and 37 of practically equal length but havin different diameters.
The diameter of zone 36 is greater than that of zone 37. Zone 36 lies towards the eyeglass frames and is cut by two planes 38 38' parallel to its geometrical axis and practically tangential to the outer surface of zone 37.
By means of this variant that part of the hinge nearest to the core 14 strengthening the earpiece can be made thinner or, al erna ively, the part where the cam of the hinge's second component is inserted can be s rengthened.

Claims

1. Hinge (13) for spectacle frames ( 11) with a fork (20) (35) made in the earpiece ( 12-), having a longitudinal hole (22) into which are placed a helical compression spring (31) and a sphere (30) which, thrust by the spring ( 31 ) , is pressed against recesses and projections (47) of a cam (42) fixed to the second component (40) of said hinge ( 13) both to render stable the earpiece ( 12) in its various working po¬ sitions and to place a limit on its opening outwards by means of an endstop to said sphere (30) in its movement to the bottom of the longitudinal hole (22) characterized in that in the longitudinal hole (22) there is a rear mouth (22) facing towards the earpiece and,after insertion of the sphere (30) and spring (31),said mouth (23) is closed by means of a cylindrical plug (33) against which touches the spring (31).
2. Hinge (13) for spectacle frames ( I I) as in claim 1, characterized in that the endstop to movement of the sphere (30) towards the end of the longitudinal hole (22) is ob- tained by a cylindrical bar (32) inside the spring (31)and lying between the sphere (30) and the plug (33).
3. Hinge ( 13) for spectacle frames ( 11) as in claim 1, characterized in that in the plug (33) there is a blind hole (34) open outwards to receive, forced into it, the usual metal core ( 14) inserted to reinforce the earpiece.
4. Hinge ( 13) for spectacle frames ( 11) as in claim 1, characterized in that the diameter of the rear mouth (23) is larger than that of the longitudinal hole (22), the edge (27) of said hole (22) thus creating a surface against which the plug (33) touches at the bottom of said mouth (23).
5. Hinge (13) for spectacle frames ( 11) as in claim 1, characterized in that the fork (20) is substantially cylindrical in shape.
6. Hinge ( 13) for spectacle frames ( 11) as in claim 1, characterized in that the fork (35) is substantially cylin¬ drical in shape having two zones (36) (37) of practically the same length but of different diameters, zone (36) with the larger diameter being placed towards the eyeglass frames and cut by two parallel planes (38) tangential to the cylin- drical surface of zone (37) of a smaller diameter, the re¬ cess (39), receiving the second part (40) of the hinge ( 13), being set at a right angle to said planes (38).
PCT/IT1990/000046 1990-03-19 1990-05-02 Hinge for spectacles with endstop procured by means of an internal slider WO1991014960A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT19718A/90 1990-03-19
IT01971890A IT1297224B1 (en) 1990-03-19 1990-03-19 HINGE FOR GLASSES WITH LIMIT SWITCH OF THE ARMS USING AN INTERNAL CURSOR

Publications (1)

Publication Number Publication Date
WO1991014960A1 true WO1991014960A1 (en) 1991-10-03

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ID=11160639

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT1990/000046 WO1991014960A1 (en) 1990-03-19 1990-05-02 Hinge for spectacles with endstop procured by means of an internal slider

Country Status (3)

Country Link
AU (1) AU5554390A (en)
IT (1) IT1297224B1 (en)
WO (1) WO1991014960A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2690760A1 (en) * 1992-05-04 1993-11-05 Essilor Int Sprung hinge, esp. for spectacle frame - comprises sprung rod with spherical tip in cavity in one component, engaging with slot and socket in other
EP0572703A1 (en) * 1992-06-05 1993-12-08 2 M S.r.l. Spectacle mount hinging elastic yielding device for earpieces with said spectacle mount hinging device
GB2268282A (en) * 1992-06-23 1994-01-05 Ottica Far East Ltd Elastic hinge for spectacles
EP0886165A1 (en) * 1997-06-19 1998-12-23 Ezio Pellegrinotti Elastic hinge for spectacles
CN104635349A (en) * 2015-03-13 2015-05-20 温州市中民眼镜有限公司 Automatically-opened elastic earpiece

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB825817A (en) * 1957-03-30 1959-12-23 Nationale Sa Improvements in or relating to the process of fabrication of a spectacle side provided with a hinge element and a spectacle side obtained by said process
EP0003928A1 (en) * 1978-02-24 1979-09-05 Etablissements Auguste LAMY & FILS Spring-loaded spectacle hinge
FR2469732A1 (en) * 1979-11-09 1981-05-22 Fortini Umberto Spectacle frame with one arm of hinge fixed to bush - is slidable against spring on metal core in hollow space inside hinged side of frame
FR2498768A1 (en) * 1981-01-28 1982-07-30 Opo Srl ELASTIC BRANCH FOR EYEGLASSES
DE8401028U1 (en) * 1984-01-14 1986-06-05 OBE-Werk Ohnmacht & Baumgärtner GmbH & Co KG, 7536 Ispringen Snap hinge for glasses
FR2609816A1 (en) * 1987-01-15 1988-07-22 Chevassus Sprung hinge for spectacles

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB825817A (en) * 1957-03-30 1959-12-23 Nationale Sa Improvements in or relating to the process of fabrication of a spectacle side provided with a hinge element and a spectacle side obtained by said process
EP0003928A1 (en) * 1978-02-24 1979-09-05 Etablissements Auguste LAMY & FILS Spring-loaded spectacle hinge
FR2469732A1 (en) * 1979-11-09 1981-05-22 Fortini Umberto Spectacle frame with one arm of hinge fixed to bush - is slidable against spring on metal core in hollow space inside hinged side of frame
FR2498768A1 (en) * 1981-01-28 1982-07-30 Opo Srl ELASTIC BRANCH FOR EYEGLASSES
DE8401028U1 (en) * 1984-01-14 1986-06-05 OBE-Werk Ohnmacht & Baumgärtner GmbH & Co KG, 7536 Ispringen Snap hinge for glasses
FR2609816A1 (en) * 1987-01-15 1988-07-22 Chevassus Sprung hinge for spectacles

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2690760A1 (en) * 1992-05-04 1993-11-05 Essilor Int Sprung hinge, esp. for spectacle frame - comprises sprung rod with spherical tip in cavity in one component, engaging with slot and socket in other
EP0572703A1 (en) * 1992-06-05 1993-12-08 2 M S.r.l. Spectacle mount hinging elastic yielding device for earpieces with said spectacle mount hinging device
GB2268282A (en) * 1992-06-23 1994-01-05 Ottica Far East Ltd Elastic hinge for spectacles
EP0886165A1 (en) * 1997-06-19 1998-12-23 Ezio Pellegrinotti Elastic hinge for spectacles
CN104635349A (en) * 2015-03-13 2015-05-20 温州市中民眼镜有限公司 Automatically-opened elastic earpiece

Also Published As

Publication number Publication date
IT1297224B1 (en) 1999-08-05
AU5554390A (en) 1991-10-21
IT9019718A1 (en) 1991-09-19
IT9019718A0 (en) 1990-03-19

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