High-amplitude elastic hinge element for eyeglass frame

1. Elastic hinge element ( 10 , 110 , 210 ) for eyeglass frames, comprising:

a longitudinal housing ( 21 ) comprising a guide zone ( 22 ),

a slide ( 30 , 130 , 230 ) arranged in the housing along one longitudinal axis of translation, the slide comprising a rear part ( 33 ) with one end ( 50 ) arranged in the housing ( 21 ), a guided part ( 32 , 132 ) that works with the guide zone, and a knuckle ( 31 , 131 , 231 ) extending to outside the housing, and

a return spring ( 40 ) of the slide mounted between a rear stop ( 50 ) and a front stop ( 60 ),

characterized in that the spring ( 40 ) has compressibility that is sufficient to allow the guided part ( 32 , 132 ) of the slide to leave the guide zone ( 22 ),

and in that the slide ( 30 , 130 , 230 ) can pivot around its longitudinal axis when the guided part ( 32 , 132 ) has left the guide zone so as to move the slide into a “locked-out” position that makes an operation of assembly or an operation of disassembly of the knuckle with a lug ( 80 , 180 , 280 ) easier.

2. Hinge element according to claim 1 , wherein the spring ( 40 ) in the state of maximum compression has a length that is less than or essentially equal to the distance that extends between the rear stop ( 50 ) and the front stop ( 60 ) when the guided part ( 32 , 132 ) of the slide leaves the guide zone.

3. Hinge element ( 10 ) according to claim 1 , wherein the knuckle ( 31 ) is in the form of a hook.

4. Hinge element ( 10 , 110 , 210 ) according to claim 1 , wherein the longitudinal housing ( 21 ) is made in a box ( 20 , 111 , 211 ) designed to be attached to a side-piece of the eyeglass frame.

5. Hinge element ( 210 ) according to claim 1 , wherein the slide is housed in a box ( 211 ) that includes two side extensions ( 212 , 213 ) that hide the knuckle ( 231 ).

6. Hinge element according to claim 1 , wherein the rear stop ( 50 ) of the spring is arranged on the end of the rear part ( 33 ) of the slide ( 30 ).

7. Hinge element according to claim 1 , wherein the slide ( 30 , 130 , 230 ) comprises a specific shape of its guided part or comprises a specific locking means so as to remain locked in a “locked-out” position after having been taken out of the guide zone and pivoted around its longitudinal axis.

8. Eyeglass frame hinge comprising:

a hinge element ( 10 , 110 , 210 ) according to claim 1 ,

a lug ( 80 , 180 , 280 ), and

a hinge axle ( 90 , 190 , 290 ) connecting the hinge element ( 10 , 110 , 210 ) to the lug ( 80 , 180 , 280 ).

9. Hinge according to claim 8 , having a position of overopening in which the lug ( 80 ) and the knuckle ( 31 ) work ( 82 ) by preventing the slide from emerging farther in front of the guide zone.

10. Hinge according to claim 8 , wherein the hinge element ( 210 ) comprises two side cheeks ( 212 , 213 ) that hide a zone of the hinge in which the axle ( 290 ) connects the hinge element ( 210 ) to the lug ( 280 ).

11. Side-piece of eyeglasses ( 70 ) comprising a hinge element ( 10 , 110 , 210 ) according to claim 1 , the longitudinal housing ( 21 ) being made in a box ( 20 , 111 , 211 ) that is integral with the side-piece.

12. Eyeglass frame comprising:

a rim,

a side-piece of the eyeglasses according to claim 11 ,

a lug ( 80 , 180 , 280 ) that is integral with the rim of the frame or formed by a part of the rim, and

a hinge axle ( 90 , 190 , 290 ) connecting the hinge element ( 10 , 110 , 210 ) to the lug ( 80 , 180 , 280 ).

13. Process of mounting or dismounting a hinge of an eyeglass frame comprising an elastic hinge element ( 10 , 110 , 210 ) and a lug ( 80 , 180 , 280 ), the hinge element comprising:

a longitudinal housing ( 21 ) comprising a guide zone ( 22 ),

a slide ( 30 , 130 , 230 ) arranged in the housing ( 21 ) along one longitudinal axis of translation, the slide comprising a rear part ( 33 ) with one end ( 50 ) arranged in the housing ( 21 ), a guided part ( 32 , 132 ) that works with the guide zone ( 22 ) and a knuckle ( 31 , 131 , 231 ) extending to outside the housing, and

a return spring ( 40 ) mounted between a rear stop ( 50 ) and a front stop ( 60 ),

characterized in that it comprises stages consisting in:

imparting to the return spring ( 40 ) a compressibility that is sufficient to allow the guided part ( 32 , 132 ) of the slide ( 30 , 130 , 230 ) to leave the guide zone,

moving the guided part ( 32 , 132 ) outside of the guide zone ( 22 ),

causing the slide ( 30 , 130 , 230 ) to pivot around its longitudinal axis so that it remains locked in a “locked-out” position, and

assembling or disassembling the knuckle ( 31 , 131 ) and the lug ( 80 , 180 , 280 ).

14. Process according to claim 13 , comprising a stage consisting in imparting a defined shape to the guided part of the slide ( 30 , 130 , 230 ) or in providing the slide with a specific locking means so that the slide remains locked in a “locked-out” position after having been taken out of the guide zone and pivoted around its longitudinal axis.

15. Process according to claim 13 , wherein the spring ( 40 ) is shaped so as to have, in the state of maximum compression, a length that is less than or essentially equal to the distance that extends between the rear stop ( 50 ) and the front stop ( 60 ) when the guided part ( 32 , 132 ) of the slide leaves the guide zone.

16. Process according to claim 13 , comprising a stage consisting in imparting to the knuckle ( 31 ) the shape of a hook to ensure its promptly catching on a hinge axle ( 90 ).

17. Process according to 13 , wherein the knuckle ( 131 , 231 ) and the lug ( 180 , 280 ) are assembled using a screw ( 190 , 290 ) that forms one axle of the hinge.

18. Process according to claim 13 , comprising a stage consisting in providing on the lug ( 80 ) and the knuckle ( 31 ) at least one zone of working ( 82 ) of the lug with the knuckle that prevents the slide from emerging farther in front of the guide zone when the hinge reaches the position of overopening.

19. Process according to claim 13 , comprising a stage consisting in providing the hinge element ( 210 ) with two side cheeks ( 212 , 213 ) that hide a zone of the hinge in which the axle ( 290 ) connects the hinge element ( 210 ) to the lug ( 280 ).