Hinge system for eyeglass frames and eyeglasses comprising such a hinge system

Abstract

The invention relates to a hinge system (1) for glasses, comprising: - a first element (10) comprising a retaining element (12);- a second element (20) comprising a hooking portion (22) forming a hook (24), the hook (24) being configured to reversibly engage the retaining element (12), the hook (24) and the retaining element (12) being configured to allow, in an engagement configuration, the rotation of the first element (10) relative to the second element (20) between at least a first position and at least a second position, the second element (20) comprising an elastic return device (26) configured to: - when the first and second elements (10, 20) are in an engagement configuration, urge the retaining element (12) towards a position in which the retaining element (12) is retained by the hook (24), so that the action of the elastic return device (26) opposes the release of the retaining element (12);and to - elastically deform to allow engagement or disengagement of the retaining element (12) and the hook (24) when a force is exerted on the elastic return device (26) with sufficient intensity. Figure for abstract: Fig. 7;

Description

Title of the invention: Hinge system for spectacle frames and spectacles comprising such a hinge system

[0001] The invention relates to the field of eyewear and more specifically concerns a hinge system for an eyeglass frame, as well as eyeglasses equipped with such a hinge system.

[0002] Glasses available on the market generally comprise a frame equipped with a screen or lenses, the screen or lenses playing a role in correcting vision and / or providing sun protection and / or physical protection for the wearer of the glasses. A glasses frame generally comprises a front intended to support the screen or lenses and two arms articulated on the front, each arm being articulated by means of an articulation device such as a hinge.

[0003] The articulation device allows the corresponding branch to pivot relative to the front, between a folded position, in which the branch is parallel or slightly inclined relative to the front, and an unfolded position, in which the branch is substantially perpendicular to the front. The folded position of the branches makes it possible to reduce the size of the glasses when they are not being worn, in particular to facilitate their storage in a case or pouch. The unfolded position is used when the glasses are worn by an individual.

[0004] Conventionally, an eyeglass hinge comprises a first part, secured to the front (or a branch) and comprising two knuckles, and a second part, secured to a branch (or the front) and comprising a knuckle inserted between the two aforementioned knuckles. A fixing screw passes through two of the knuckles and is screwed onto the third knuckle. This fixing screw also serves as a pivot during the pivoting movement of the branch relative to the front, and it is known that regular stresses eventually cause the fixing screw to loosen, this loosening affecting the maintenance of the branch concerned and very often resulting in the loss of the screw.

[0005] Generally, it is very difficult for a spectacle wearer to intervene on the fixing screw himself, even just to tighten it, due to its very small dimensions which require the use of a specialized tool. This is all the more difficult for the spectacle wearer as these operations require very good close-up vision, while the wearer is at the same time deprived of the spectacles on which he wishes to intervene.

[0006] In addition, the very small size of the fixing screw greatly complicates maintenance and repair operations requiring handling of this screw. It happens by example that the fixing screw breaks, and the operations to extract the broken screw and replace it are then very delicate, even impossible without damaging the hinge.

[0007] The problems set out above are even more significant in the case of hinges comprising a system allowing an extension of the branches beyond the unfolded position, commonly called "flex" hinges. Indeed, such a system generally requires an additional component (such as a spring) attached to the hinge, which makes the assembly and disassembly of the hinges even more complex, even for a professional.

[0008] It therefore appears that the design of known eyeglass frame hinges has numerous drawbacks.

[0009] The present invention aims to remedy the drawbacks of the state of the art, and in particular those described above, by proposing a hinge system for spectacle frames whose assembly and disassembly can be carried out without screws, without tools, and in a simple and rapid manner.

[0010] For this purpose, the invention relates to a hinge system for glasses, the hinge system comprising:

[0011] - a first element comprising a retaining element;

[0012] - a second element comprising a hooking part forming a hook, the hook being configured to reversibly engage the retaining element of the first element, the hook and the retaining element being configured to allow, in an engagement configuration of the first element and the second element, the rotation of the first element relative to the second element between at least a first position, or folded position, and at least a second position, or unfolded position, the second element comprising an elastic return device configured to:

[0013] - when the first and second elements are in a configuration engagement, biasing the retaining element toward a position in which the retaining element is retained by the hook, such that the action of the elastic return device opposes the release of the retaining element by the hook; and for

[0014] - deform elastically to allow engagement or disengagement of the retaining element and the hook when a force is exerted on the elastic return device via the first element with sufficient intensity.

[0015] Thus, the hinge system for glasses according to the invention allows the fitting and dismantling of the temples of glasses without tools, simply and quickly, even "blindly". The hinge system according to the invention is adaptable to all types of glasses having articulated temples, regardless of the type of design of the glasses frame (acetate frame, pierced or rimmed frame, "nylor" type, etc.), the shape of the glasses, the materials used, etc. Furthermore, in an advantageous embodiment, the hinge system according to the invention makes it possible to produce just as simply, without additional cost and without additional components, a “flex” type hinge, making it possible to obtain an additional spacing beyond the unfolded position of the branches, with an elastic return.

[0016] In one embodiment, the elastic return device is further configured to deform elastically in order to allow movement of the retaining element relative to the hook when the first element is rotated from the unfolded position, in a direction identical to the direction of passage from the folded position to the unfolded position, the movement of the retaining element making it possible to obtain an overshoot of the unfolded position, the first element being returned to the unfolded position by the action of the elastic return device when it is no longer stressed.

[0017] In one embodiment, the elastic return device comprises at least one angular action spring.

[0018] In one embodiment, the elastic return device comprises at least one leaf spring.

[0019] In one embodiment, the elastic return device has a general “V” shape, the elastic return device comprising a first part and a second part, the two parts forming an angle between them when the elastic return device is not stressed, preferably an angle of less than 120°.

[0020] In one embodiment, the first part and the second part have an identical length.

[0021] In one embodiment, the second element comprises an open cavity formed in the hooking portion such that the hook delimits a portion of the cavity, the cavity being configured to allow insertion of the retaining element.

[0022] In one embodiment, the cavity comprises a support wall forming a support for the elastic return device.

[0023] In one embodiment, a free edge of the support wall located opposite the hook comprises a rim allowing the elastic return device to be positioned.

[0024] In one embodiment, the retaining element is integral with the first element, or removably mounted on the first element.

[0025] In one embodiment, the retaining element has a straight cylindrical shape, in particular with a circular base.

[0026] In one embodiment, the first element comprises two side walls shaped to at least partially frame the second element, each side wall comprising a cavity configured to receive one end of the retaining element.

[0027] In one embodiment, the side walls are configured to enclose the second element in an engaging configuration.

[0028] In one embodiment, the retaining element comprises at least one central portion having a smaller cross-section than the cross-section of the ends, the central part forming a bearing surface for the elastic return device, the retaining element being rotatably mounted in the first element.

[0029] In one embodiment, the central portion of the retaining element has at least one flat.

[0030] In one embodiment, the retaining element has at least one flat forming a bearing surface for the elastic return device, the retaining element being integral in rotation with the first element, the cooperation between the flat and the elastic return device making it possible to obtain indexing of the first element in a determined angular position relative to the second element.

[0031] In one embodiment, the retaining element comprises two flats of different orientations, so as to obtain two distinct indexed positions, corresponding for example respectively to the unfolded position and the folded position.

[0032] In one embodiment, the second element comprises two half-parts assembled along a plane perpendicular to the axis of rotation of the first element.

[0033] In one embodiment, the second element comprises an element for indexing the position of the elastic return device, for example a projecting element cooperating with a notch provided in the elastic return device.

[0034] In one embodiment, the first element comprises a lever, one end of which is secured to the retaining element, the lever comprising, at an end opposite the retaining element, a fixing portion, the second element comprising a housing communicating with the cavity, the housing being configured to receive a portion of the lever and allow its rotation when the first and second elements are in the engagement configuration.

[0035] The invention also relates to glasses comprising two arms connected to a front, each arm being articulated by means of a hinge system conforming to that described above, the unfolded and folded positions of each hinge system corresponding respectively to the unfolded and folded positions of the respective arm.

[0036] In one embodiment, each hinge system is configured to allow an extension movement, i.e. a rotational movement of the corresponding branch, in a direction identical to the direction of rotation allowing passage from the folded position to the unfolded position, bringing the branch beyond the unfolded position, the extension movement generating an elastic deformation of the elastic return device under the action of the retaining element.

[0037] In one embodiment, the retaining element moves, during the extension movement of the corresponding branch, along a bottom wall of the cavity, the bottom wall preferably having a convex portion.

[0038] In one embodiment, the second element comprises a rear portion comprising a clearance configured to guide an inner edge of the corresponding branch during the extension movement.

[0039] In one embodiment, the first element and / or the corresponding branch comprises an inner edge comprising a projecting portion cooperating with the release of the second element during the extension movement.

[0040] In one embodiment, for each branch, the first element of the corresponding hinge system is secured to the facade, the second element being secured to the branch.

[0041] In one embodiment, for each branch, the second element of the corresponding hinge system is secured to the branch, the first element being secured to the facade.

[0042] In one embodiment, for each branch, the second element is configured such that the hook is located on the inner side of the branch.

[0043] In one embodiment, for each branch, the second element is configured such that the hook is located on the outer side of the branch.

[0044] The present invention will be better understood upon reading the following detailed description, given with reference to the appended drawings, in which:

[0045] [Fig-1] [Fig.l] is a perspective view of glasses equipped with systems of hinge in accordance with the invention.

[0046] [Fig.2] [Fig.2] is a perspective view of a first element of a system of hinge according to the invention.

[0047] [Fig.3] [Fig.3] is a perspective view of a second element of a hinge system according to the invention, shown without the elastic return device.

[0048] [Fig. 4 Figure 4 is a perspective view of the second element equipped with the elastic return device.

[0049] [Fig.5] [Fig.5] is a perspective view of the retaining element of the first element.

[0050] [Fig.6] [Fig.6] is a perspective view of the elastic return device.

[0051] [Fig.7] [Fig.7] is a perspective view of a hinge system according to the invention in which the first and second elements are assembled.

[0052] [Fig.8] [Fig.8] is a perspective view of a hinge system according to the invention in which the first and second elements are assembled, the first element being integral with a spectacle arm frame.

[0053] [Fig.9] [Fig.9] is a perspective view of a hinge system according to the invention, the first and second elements being assembled, the first element being formed directly in a branch of glasses.

[0054] [Fig. 10] [Fig. 10] is a view of the hinge system of [Fig.9], the first and second members being assembled.

[0055] [Fig. 11] [Fig. 11] illustrates an initial step in the assembly of a branch of glasses according to the invention.

[0056] [Fig. 12] [Fig. 12] illustrates a first intermediate step in the assembly of a spectacle arm in accordance with the invention.

[0057] [Fig. 13] [Fig. 13] illustrates a second intermediate step in the assembly of a spectacle arm in accordance with the invention.

[0058] [Fig. 14] [Fig. 14] illustrates a third intermediate step in the assembly of a spectacle arm in accordance with the invention

[0059] [Fig. 15] [Fig. 15] illustrates a final step in the assembly of a spectacle arm in accordance with the invention.

[0060] [Fig. 16] [Fig. 16] shows one arm of the glasses of [Fig.l] in an unfolded position.

[0061] [Fig.17] [Fig.17] is a view similar to [Fig.16], the branch being in a first extended position.

[0062] [Fig. 18] [Fig. 18] is a view similar to [Fig. 16], the branch being in a second extended position.

[0063] [Fig.19] [Fig.19] is a view similar to [Fig.16], the branch being in a third extended position.

[0064] [Fig.20] [Fig.20] illustrates an embodiment of the hinge system in which the second element is configured to allow a return of the first element towards the unfolded position or towards the folded position, the eyeglass arm carrying the first element being in an unfolded position.

[0065] [Fig.21] [Fig.21] is a perspective view showing different variants of the retaining element.

[0066] [Fig.22] [Fig.22] illustrates an embodiment similar to that of [Fig.20], the branch carrying the first element being in an extended position.

[0067] [Fig.23] 23 illustrates an embodiment of the hinge system, in an unfolded position.

[0068] [Fig.24] 24 illustrates an embodiment of the hinge system, in a folded position.

[0069] [Fig.25] [Fig.25] is a perspective view of a retaining element.

[0070] [Fig.26] [Fig.26] is a perspective view of a retaining element.

[0071] [Fig.27] [Fig.27] is a view of an embodiment of the second element.

[0072] [Fig.28] [Fig.28] is a view of the second element of [Fig.27].

[0073] [Fig.29] [Fig.29] is a view of an embodiment of the second element.

[0074] [Fig.30] [Fig.30] is a perspective view of an embodiment of the hinge system particularly suitable for producing rimmed glasses.

[0075] [Fig.31] [Fig.31] is a perspective view of the second element of the system of [Fig.30].

[0076] [Fig.32] [Fig.32] is a perspective view of the system of [Fig.30].

[0077] [Fig.33] [Fig.33] is a view of the first element in a configuration allowing the first and second elements to be disconnected in the event of excessive traction on a pair of glasses.

[0078] [Fig.34] [Fig.34] is a view of the first element of [Fig.33].

[0079] [Fig.35] [Fig.35] illustrates an embodiment of the hinge system according to the invention, in which the retaining element is integral with a lever allowing direct fixing in a spectacle arm or a spectacle front.

[0080] [Fig.36] [Fig.36] illustrates in the hinge system of [Fig.35], the two elements being in an unfolded configuration.

[0081] [Fig.l] shows glasses 2 equipped with hinge systems 1 according to the invention. The glasses 2 are, in the example, corrective glasses, and comprise, in a conventional manner, a frame 3 and corrective lenses 4 secured to the frame 3. The frame 3 comprises a front 5 and two arms 6 each articulated by means of a respective hinge system 1. The arms 6 are thus movable in rotation relative to the front 5, in particular between an unfolded position, visible in [Fig.l], allowing the glasses to be worn by a user, and a folded position, in which the arms are folded towards the front 5, in particular to allow the glasses to be stored.

[0082] A hinge system 1 according to the invention is shown in Figures 2 to 10. It comprises a first element 10 and a second element 20 configured to be attached to each other in a reversible manner. In the example of Figures 2 to 10, the first element 10 is intended to be carried by a branch 6 of the glasses 2, while the second element 20 is intended to be carried by the front 5. Alternatively, an inverse configuration may be provided, in which the first element 10 is carried by the front 5 while the second element 20 is carried by a branch 6.

[0083] The first element 10 comprises a retaining element 12 having a generally elongated shape along a longitudinal axis. The longitudinal axis of the retaining element 12 is, in an operating configuration of the hinge system 1, parallel to the axis of rotation of the first element 10 relative to the second element 20. In the example, the retaining element 12 has the shape of a rod. The second element 20 comprises a hooking portion 22, the hooking portion 22 comprising a portion forming a hook 24, and a fixing portion 23 allowing the fixing of the second element 20 to an eyeglass component, such as a front 5 of eyeglasses 1 or a temple. The fixing portion 23 is provided in the example to be overmolded in the front 5 which is made at least partially from a plastic material (such as acetate), but may be fixed to an eyeglass frame by any means adapted (riveting, gluing, screwing, etc.). In the example of Figures 2 to 8, the first element 10 is integral with a frame 100 (in particular a metal frame), configured to form a branch 6 of glasses, or to be integrated into such a branch 6, for example by overmolding when the branch 6 comprises a plastic material. Alternatively, the first element 10 can be fixed directly to a branch 6 (or to a front 5), by any suitable means (riveting, screwing, gluing, etc.). Alternatively, as shown in Figures 9 and 10, the first element 10 can be at least partly formed directly in a branch of glasses, the branch then comprising an end part forming the whole of the first element 10 with the exception of the retaining element 12.

[0084] The hook 24 and the retaining element 12 are configured to, in an engagement configuration visible in Figures 7, 8 and 10, cooperate so as to allow the rotation of the first element 10 relative to the second element 20, and thus allow the rotation of a spectacle branch 6 relative to the front 5. The rotation between the first element 10 and the second element 20 can be carried out between at least one folded position and one unfolded position. In the engagement configuration, the second element 20 is preferably partially embedded in the first element 10. In the example of the figures, the hooking part 22 of the second element 20 is at least partially framed by two side walls 14, or cheeks 14, equipping the first element 10. Each cheek 14 comprises a cavity 140, through or not, configured to receive one end of the retaining element 12.The retaining element 12 may be fixed integrally to the first element 10 or simply inserted into the cavities 140 provided for this purpose. The retaining element 12 may be integral in rotation relative to the first element 10 or be free in rotation relative to the first element 10. The first element 10 may comprise a bottom wall 16 joining the two side walls 14.

[0085] In order to allow the mutual and reversible fixing of the first and second elements 10, 20, the second element 20 comprises an elastic return device 26 (visible in particular in [Fig.6]), arranged in an open cavity 28. The cavity 28 is formed in the hooking part 22 so that the hook 24 delimits a part of the cavity 28, and in particular a part of the opening of the cavity 28. The cavity 28 is configured to allow the insertion of the retaining element 12 into the cavity 28, up to a position in which the retaining element 12 is engaged with the hook 24. For this purpose, the cavity 28 comprises a support wall 280 forming a support for the elastic return device 26, arranged at least partially opposite a free end 240 of the hook 24.The cavity 28 is shaped so that the opening of the cavity, i.e. the space located between the free end 240 of the hook 24 and the support wall 280, allows the passage of the retaining element 12. in a direction of movement perpendicular to the longitudinal axis of the retaining element 12.

[0086] The elastic return device 26, an exemplary embodiment of which is shown in [Fig. 6], is a spring 26 of the angular action type, arranged in the hooking part 22 so as to oppose the insertion of the retaining element 12, to deform to allow the passage of this element under the action of a sufficient force, then to push the retaining element towards a bottom 242 of the hook 24. The spring 26 comprises for this purpose a first part 260 and a second part 262 integral with the first part 260. In the example, the two parts 260, 262 are flat and form an angle between them, in particular an angle of between 30° and 120° when the spring is not stressed. This angle can alternatively be between 30° and 90°, or between 45° and 90°, or between 30° and 70°. Thus, the spring 26 has a “V” shape. In the example of Figures 2 to 10, the spring 26 is a leaf spring.Advantageously, the first part 260 and the second part 262 are of identical length, which makes it possible not to impose which of these two parts rests against the support wall 280, and therefore to facilitate the mounting of this element in the second element 20. It will be noted that the use of an angular action spring, in particular a spring having a “V” shape, makes it possible to ensure precise mounting of the latter in the second element 20. Indeed, as it is necessary to reduce the size of the spring 26 by temporarily compressing it to insert it into the cavity 28, the spring 26, by deploying once inside the cavity and bearing on the support wall 280 and on the hook 24, will spontaneously adopt the required position, that shown in [Fig.4].

[0087] The cooperation between the different elements of the hinge system 1, as well as the operation of the elastic return device 26 are better visible in Figures 11 to 15, which show the steps necessary to achieve the mutual attachment of the first and second elements 10, 20. The first step consists of bringing the first element 10 (therefore in the example a branch of glasses 6 incorporating this element) closer to the second element 20 (which is secured to a corresponding front 5 of glasses). The position of the first element 10 must correspond to a folded position of the corresponding branch 6, or be close to such a position ([Fig.l 1]). The retaining element 12, or axis 12, is then inserted between the hook 24 and the elastic return device 26, or spring 26 ([Fig. 12]).The elastic return device 26 is then pressed, by means of the retaining element 12 (therefore via the first element 10 and the branch 6), so as to force the entry of the retaining element 12 into the cavity 28 ([Fig.13], [Fig.14]). Once the axis 12 has passed the free end 240 of the hook 24, it is possible to let the spring 26 act, the action of which will tend to push the axis 12 towards the bottom 242 of the hook ([Fig.15]). In the . engagement configuration of the first and second elements 10, 20, the axis 12 is biased by the spring 26 towards the bottom 242 of the hook. The axis 12 is thus engaged with the hook 24. The action of the elastic return device 26, which tends to push the axis 12 towards the bottom of the hook 242, prevents any spontaneous exit of the axis 12 from the hook 24, and therefore the unwanted separation of the first and second elements 10, 20.

[0088] If it is desired to separate the first and second elements 10, 20, it is sufficient to carry out the reverse steps to those described above, namely to drive the axis 12, via the first element 10 in the folded position (therefore of the branch 6 in the folded position, in the example) so as to push back the spring 26, then pull on the first element 10 until the axis 12 is released from the hook 24, and therefore from the second element 20.

[0089] It is therefore understood that the joining and unjoining of the first and second elements, 10, 20, are carried out in a very simple and rapid manner, and without requiring tools. The simplicity of these operations makes them accessible to the wearer of glasses (including "blindly", without their glasses), unlike the hinges of the state of the art, the assembly and disassembly of which require specific tools, and should preferably be carried out by a professional.

[0090] Advantageously, the side walls 14 of the first element 10 enclose the second element 20, so that the play between the first element 10 and the second element 20 is very small or even zero. This configuration contributes to the mutual maintenance of the two elements 10, 20 and to the mechanical stability of the hinge system, in particular during the phases of mutual rotation of the two elements 10, 20. Thus, the branches 6 fixed to a front 5 of glasses by means of hinge systems 1 according to the invention are fixed without axial play (i.e. without play in a direction parallel to the axis of rotation).

[0091] Advantageously, as shown in particular in Figures 16 to 19, the hinge system 1 according to the invention can be configured, in a very simple manner and without additional cost, so as to allow an extension of the temples of the glasses, that is to say an overshoot of the unfolded position of the temples 6. This overshoot is accompanied by an elastic return of the temple, that is to say that in the event of overshooting the unfolded position, the temple is elastically urged towards its unfolded position. This possibility is obtained very simply thanks to the elasticity of the spring 26, which allows by deforming that the temple 6, integral with the first element 10 (and therefore with the axis 12), can be driven in rotation beyond the unfolded position, shown in [Fig. 16]. [Fig. 16] shows the unfolded position of a branch 6, which corresponds in the example to an angle of approximately 90° between a longitudinal axis X of the branch 6 and a longitudinal axis Y of the facade 5.In this position, axis 12 is held in the . bottom 242 of the hook (or in the immediate vicinity of this bottom 242, a slight detachment of the axis 12 being possible). If one tends to move the branch 6 away from this unfolded position (outwards), as visible in figures 17 to 19 which show angles between the axes X and Y respectively of 95, 100 and 105°, the axis 12 will push the spring 26 back until it reaches, in the maximum extension position of [Fig.19], the maximum compression thereof. At the same time, the axis 12 moves along a bottom wall 282 of the cavity 28, wall joining the bottom 242 of the hook 24 to the support wall 280. Thus, a so-called "flex" hinge system is produced, making it possible to simply obtain an extension going for example up to 15° beyond the unfolded position.It will be noted that the hinge system 1 according to the invention makes it possible to produce a hinge with extension, called a “flex” hinge, simply and at no extra cost compared to a version not allowing such an extension.

[0092] Preferably, the bottom wall 282 has a convex portion 282a allowing, during the extension movement beyond the unfolded position, that the distance between the retaining element 12 and the portion of the facade opposite the point of rotation of the branch 6, located at an outer edge 60 of the branch 6, remains constant. This distance corresponds to the radius R2, visible in Figures 17 and 19 (and also in Figures 20 and 22). Advantageously, the surface of the convex portion 282a forms a portion of cylinder of diameter R2, as visible in particular in Figures 20 and 22. This prevents the branch 6 from projecting beyond the facade 5 during the extension movement, which makes it possible to preserve the aesthetic character of the junction between the branch 6 and the facade 5, whatever the position of the branch 6.

[0093] Advantageously, as visible in Figures 16 to 19, the axis 12 comprises at least one flat 120. Such a configuration makes it possible to reduce the size of the retaining element 12 and therefore of the hinge system 1. Indeed, as the spring 26 is supported on the flat 120, the spring 26 is closer to the longitudinal axis of the retaining element 12 than when it is supported on a retaining element not comprising a flat. This configuration thus makes it possible to reduce the size of the second element in the direction of the length of the branches in the unfolded position (i.e. the size along the direction X as shown in [Fig. 16]), and, more generally, the size of the hinge system 1.In this case, it is necessary that the retaining element 12 is not rotationally integral with the first element 10, so that the flat 120 and the second part 262 of the spring 26 are always aligned, regardless of the relative position of the first and second elements 10, 20.

[0094] Alternatively, a retaining element 12 comprising at least one flat 120 can make it possible to obtain indexing of at least one position (for example the unfolded position), by cooperation between the flat 120 and the spring 26. Such a configuration requires that the axis 12 be integral in rotation with the first element 10. Thus, during the rotational movement of the branch 6 from the folded position to the unfolded position, the action of the spring 26 on the axis 12 will tend, due to the flat support between the spring 26 and the axis 12, to maintain the orientation of the axis 12 (and therefore of the first element 10) when this corresponds to the unfolded position of the branch 6 integral with the first element 10.

[0095] Advantageously, as can be seen in particular in [Fig. 20], the attachment part 22 comprises a rear part 200, located at the rear of the cavity 28. The rear part 200 may comprise a circular portion of radius R and center C (the center C coinciding with the position of the longitudinal axis of the axis 12 when the two elements 10, 20 are in the engagement configuration). The radius R is then less than or equal to the distance D between the center C and the bottom wall 16 of the first element 10 (which is in the example formed by a part of the branch 6, and more precisely by a part of the frame 100).

[0096] Advantageously, the radius R is close to or equal to the distance D. In particular, the value of the distance D is sufficiently close to the value of the radius R to ensure contact between the rear part 200 and the bottom 16 during rotation of the branch 6.

[0097] Advantageously, as shown in [Fig.20], the rear part 200 comprises a protrusion 202 relative to the circular shape of radius R. In the example, the protrusion has a progressive profile, so as to reach a maximum for an angle of rotation of the first element between 30° and 60° (relative to the unfolded position), and for example equal to or close to 45°. The protrusion 202 makes it possible to obtain a hard point during the rotational movement of the branch 6 (in both directions of rotation). Thus, the passage of this hard point, which is accompanied by an additional compression of the spring 26, makes it possible to obtain an automatic return of the corresponding branch towards the unfolded position as towards the folded position, depending on the direction of rotation. At its maximum, the outgrowth implies an excess thickness e in relation to the radius R which is less than 2 millimeters, or less than 1 millimeter and for example less than 0.5 millimeters.In this case, the distance D given above is between R and R+e.

[0098] Advantageously, as visible in [Fig.21] which illustrates three different embodiments of the retaining element 12, the latter may comprise a central part 121 having a smaller cross-section than the cross-section of the ends 122. In this case, the ends 122 are shaped to allow the rotation of the axis 12 relative to the first element 10. For example, the cross-section of the ends 122 is circular in shape. Such a configuration makes it possible to obtain a limitation of the movements of the axis 12 by the spring 26 when this the latter is supported on the axis 12, and more precisely on the central part 121. Indeed, on the one hand, the cooperation between the shape of the central part 121 and the spring 26 limits the movements of the axis 12 (in the longitudinal direction thereof), and, on the other hand, the movements of the spring 26 are limited by the first element 10 which frames, or even encloses the second element 20 in which the spring 26 is inserted. Such a configuration makes it possible to obtain a hinge system offering simplified assembly, without fixing the retaining element 12. Indeed, when at least one of the cavities 140 formed in the side walls 14 of the first element 10 is through, it is possible to put the retaining element 12 in position by inserting it directly into the corresponding cavity 140 (or by one of the cavities 140 when both are through).Once the first and second elements 10, 20 are in the engagement configuration, the spring 26 is supported on the central part 121 of the retaining element 12 as explained above, which prevents the retaining element 12 from being able to spontaneously eject from the hinge system. As shown in [Fig. 21], the central part 121 of reduced cross-section can be obtained in different ways, and for example by means of a flat 120, a symmetrical shape of revolution with a diameter smaller than the diameter of the ends 122, or even a shape comprising a plurality of flats 120 distributed along the periphery of the central part 121. The retaining elements 12 of [Fig. 21] can advantageously be used in the configuration of Figures 16 to 19.

[0099] [Fig.22] shows a configuration similar to that of [Fig.20], the branch 6 being in an extension position as defined above. In [Fig.22], an arc of a circle of radius R2 has been shown, which is therefore coincident with the convex part 282a of the bottom wall 282. Radius R3 has also been shown, corresponding substantially to the movement of the free end of the upper part of the spring 26 when the latter is pushed back by the retaining element 12 during the extension movement. As visible in [Fig.22], radii R2 and R3 may be tangent at a point, but must not be sequential for the proper functioning of the hinge system 1. The configuration of the convex part 282a of [Fig.22] is preferably implemented for all the embodiments described in the present application for which it is desired to provide the possibility of an extension movement.

[0100] Advantageously, as visible in Figures 23 to 26, the axis 12 may comprise two flats 120, each flat making it possible to obtain respectively the indexing of one of the unfolded ([Fig.24]) and folded ([Fig.23]) positions. The angle between the flats 120 thus corresponds to the angle between the unfolded and folded positions of the branch 6. As visible in Figures 25 and 26, the ends 122 of the axis 12, which are configured to be inserted into the cheeks 14 of the first element 10, are of cylindrical shape of circular ([Fig.26]) or non-circular ([Fig.25]) section. In the example of [Fig.25], the ends 122 of the axis 12 have a non-symmetrical shape of revolution, in particular an oblong cross-sectional shape. Such a shape makes it possible to obtain a rotational lock when the axis 12 is inserted into the cavities 140 of the first element 10 (the latter then having a complementary shape), and also makes it possible to play the role of a foolproof device when the axis 12 must be inserted in a precise angular position (which will generally be the case if it is desired to obtain an indexing of one and / or the other of the folded and unfolded positions).

[0101] The presence of two flats 120 such as those shown in Figures 23 to 26 also makes it possible to obtain a hard point similar to that described above when moving from the unfolded position to the folded position and vice versa. Indeed, when rotating the first element 10, for example to move from the unfolded position ([Fig.23]) to the folded position ([Fig.24]), the rotation of the retaining element 12 relative to the second element 20 will imply that the latter will roll on the spring 26. The spring 26, initially pressed against one of the flats 120 ([Fig.23]), will at the end of the rotational movement find itself pressed against the other flat 120 ([Fig.24]). During the transition phase between the spring 26 pressing on one of the flats and the spring 26 pressing on the other flat 120, the retaining element 12 is in contact with the spring 26 via the edge (or the rounded edge where appropriate) formed between the two flats 120.During this transition phase, the element 12 pushes back the spring 26. This additional force exerted by the retaining element 12 during the transition phase results in increased resistance to the rotational movement. This additional resistance is felt by the user as a hard point. Once the edge formed between the two flats is exceeded, the resistance to the rotational movement decreases, and the action exerted by the spring 26 on the retaining element 12 tends to urge the first element towards its final position, that is to say towards the unfolded or folded position depending on the direction of rotation.

[0102] Advantageously, as visible in Figures 16 to 19 and 23 and 24, the rear part of the second element includes a clearance 206 making it possible to facilitate the movement of the first element 10, in particular during the extension movement beyond the unfolded position of the branch 6. The clearance 206 makes it possible to avoid any contact between the outer edge 60 of the branch 6 and the rear of the front 5 during the extension movement. Indeed, the clearance ensures guidance of an inner edge 62 of the corresponding branch making it possible, in combination with the convex part 282a of the bottom wall 282, to ensure that during the extension movement, the outer edge 60 of the branch moves slightly away from the front of the frame.Furthermore, the guidance of the inner edge 62 of the corresponding branch 6 is carried out in such a way that during the extension movement, no lateral shift of the branch 6 occurs (i.e. the position of the outer edge 60 along a direction parallel to . the Y axis of [Fig.16] is not modified during the extension movement). Advantageously, the inner edge 62 of the glasses branch comprises a projecting portion (formed on the branch and / or the first element) improving the cooperation between the inner edge 62 and the clearance 206 of the second element. This avoids any friction between the branch and the front likely to damage the front or the branch.

[0103] Advantageously, the support wall 280 has at a free end a rim 280a making it possible to limit any possible movements of the spring 26 during manipulation of the hinge system 1. The rim 280a makes it possible in particular to prevent involuntary extraction of the spring 26 from its housing provided in the second element, during manipulations aimed at separating the first and second elements from each other.

[0104] Advantageously, as visible in Figures 27 and 28, the support wall 280 comprises a groove 280b in which one of the parts 260, 262 of the spring 26 can be at least partially inserted. Such a configuration makes it possible to obtain strong lateral support for the spring 26 (it being specified that when the two elements 10, 20 are assembled, the spring 26 is in all cases prevented from coming out through the cheeks 14 of the first element). A groove 282b may also be made in the bottom wall 282 of the cavity, the free end of the part 262 of the spring 26 in contact with the axis 12 being capable of moving in the groove 282b during the compression and expansion movements of the spring 26. Such a configuration makes it possible to ensure that the contact surface between the axis 12 and the spring 26 is maximum (including during the extension movement), since it makes it possible to maximize the length of the part 262 of the spring which is supported on the axis 12.Compared with the configuration shown in particular in figures 20 and 22, the configuration of figures 27 and 28 corresponds to a configuration in which the radii R2 and R3 are intersecting.

[0105] As visible in [Fig.29], the spring 26 may be a spring whose parts 260, 262 have a circular section (for example a wire spring), in which case it is preferable to provide a groove 280b in the support wall 280 and a groove 282b in the bottom wall 282, in order to ensure satisfactory lateral support of the spring 26.

[0106] Figures 30 to 32 show an embodiment of the hinge system 1 adapted to so-called rimmed glasses. As visible in [Fig. 30], each lens 4 is surrounded by a rim 7 (partially shown), in particular a metal rim. The second element 20, better visible in [Fig. 31], is fixed to the rim 7 and comprises for this purpose two half-parts 20a, 20b attached to each other, but which can be separated from each other in an open configuration of the rim 7, allowing the mounting or dismounting of the lenses 4. For this purpose, the rim 7 comprises two end parts 7a, 7b which can be separated, and each half-part 20a, 20b of the second element 20 is fixed respectively to one of the end parts 7a, 7b of the strapping 7, for example by welding. The two half-parts 20a, 20b are held together when the first and second elements 10, 20 are in the engagement configuration, the cheeks 14 of the first element then enclosing the half-parts 20a, 20b of the second element 20. In the engagement configuration, holding the two half-parts 20a, 20b against each other makes it possible to maintain the strapping 7 in the closed configuration. The arrangement of FIGS. 30 to 32 makes it possible to eliminate the presence of four screws compared to known frames, namely two screws used for fixing the strappings of the lenses and two hinge screws. Advantageously, one of the two half-parts comprises a part forming a cover 20c, making it possible to conceal the junction between the two half-parts. Advantageously, the second element 20 comprises an indexing element 280c, in the form of a projecting element 280c secured to one of the half-parts 20a.The projecting element 280c ensures the correct positioning and lateral support of the spring 26, the spring 26 comprising a notch 264 of complementary shape. Advantageously, the half-part 20b which does not comprise the projecting element 280c comprises a lateral edge forming a part of the contour of the cavity 28 which is chamfered. This configuration is intended to facilitate the insertion of the spring 26 when the latter is previously positioned in the half-part 20a comprising the projecting element 280c when the two half-parts 20a, 20b are joined.

[0107] Figures 2 to 29 show exemplary embodiments of the hinge system according to the invention in which the second element 20 comprises a hooking part 22 whose cavity 28 is intended to be oriented inwards when the hinge system 1 is fitted to glasses. In other words, when the branches are unfolded, the cavities 28 of the second elements 20 of each branch 6 are oriented inwards, that is to say towards each other. Figures 30 to 32, 33 and 34 illustrate an exemplary embodiment in which the first element 10 is configured so that the cavity 28 is oriented outwards. The operation of the second element 20, and its cooperation with the first element 10 is analogous to that described above.However, during the extension movement of the branch 6 (i.e. the movement beyond the unfolded position), the retaining element 12 will, due to the inverted configuration of the second element 20, move along a wall 283 opposite the bottom wall 282 (and no longer along the bottom wall 282, as for the embodiments described previously). Such a configuration makes it possible to ensure better security of the attachment of the branches 6 to a front of glasses, by allowing that an excessive extension of a branch results in the separation of the branch and the frame. [Fig. 34] shows three different positions of a branch of glasses: the unfolded position (position I), the maximum extension position (position II) and an extraction position (position III). Thus, as the . shows position III, too great an extension of the branch will result in the extraction of the axis 12 from the cavity 28, and thus in the separation of the branch from the front, thus avoiding breakage of the frame. Advantageously, the opposite wall 283 has a concave part 283a making it possible to index the maximum extension position, before separation of the first and second elements (position II).

[0108] Figures 35 and 36 illustrate an embodiment in which the second element 20 is integral with a branch 6 of glasses, while the first element 10 is intended to be fixed to a front 5 of glasses. In the example of Figures 35 and 36, the first element comprises a lever 11, one end of which is integral with the retaining element 12. The lever 11 comprises, at an end opposite the retaining element 12, a fixing part 110 configured to be fixed to a front of glasses, for example by overmolding. The second element forms a housing configured to receive the spring 26 and the retaining element in a configuration similar to the different configurations described above. Thus, the second element comprises a cavity 28 for receiving the spring 26 and the retaining element 12.The second element further comprises a housing 28a, communicating with the cavity 28, making it possible to receive a part of the lever 11 and allowing the latter to rotate, as shown in Figures 35 and 36 which show two angular positions of the first element 10 and therefore of the lever 11. Advantageously, the lever 11 comprises a clearance 112 arranged between the retaining element 12 and the fixing part 110. The clearance 112 makes it possible to obtain an extension movement as described above, that is to say a movement going beyond the unfolded position as shown in [Fig.36].

[0109] Of course, as for all the embodiments described above, the first element 10 of figures 35 and 36 can be configured to be secured to a branch 6 of glasses while the second element 20 can be configured to be secured to a front 5 of glasses. A configuration thus reversed with respect to the embodiment of figures 35 and 36 is particularly suitable for the production of metal glasses, and in particular so-called pierced glasses or so-called nylor glasses.

Claims

Claims

1. Hinge system (1) for eyeglasses (2), the hinge system (1) comprising: - a first element (10) comprising a retaining element (12); - a second element (20) comprising a hooking portion (22) forming a hook (24), the hook (24) being configured to reversibly engage the retaining element (12) of the first element (10), the hook (24) and the retaining element (12) being configured to allow, in an engagement configuration of the first element (10) and the second element (20), the rotation of the first element (10) relative to the second element (20) between at least a first position, or folded position, and at least a second position, or unfolded position, the second element (20) comprising an elastic return device (26), which elastic return device is an angular action spring having a general “V” shape configured to: - when the first and second elements (10, 20) are in an engagement configuration, bias the retaining element (12) towards a position in which the retaining element (12) is retained by the hook (24),such that the action of the elastic return device (26) opposes the release of the retaining element (12) by the hook (24); and to - deform elastically to allow the engagement or disengagement of the retaining element (12) and the hook (24) when a force is exerted on the elastic return device (26) via the first element (10) with sufficient intensity, and wherein the second element (20) comprises an open cavity (28) formed in the hooking part (22) such that the hook (24) delimits a part of the cavity (28), the cavity (28) being configured to allow the insertion of the retaining element (12), characterized in that:, - the elastic return device (26) is arranged in the cavity (28), which cavity comprises a support wall (280) forming a support for the elastic return device (26).

2. Hinge system (1) according to the preceding claim, in which the elastic return device (26) is further configured to deform elastically in order to allow movement of the retaining element (12) relative to the hook (24) when the first element (10) is rotated from the unfolded position, in a direction identical to the direction of passage from the folded position to the unfolded position, the movement of the retaining element (12) making it possible to obtain an overshoot of the unfolded position, the first element (10) being returned to the unfolded position by the action of the elastic return device (26) when it is no longer stressed.

3. Hinge system (1) according to one of claims 1 and 2, in which the elastic return device (26) comprises at least one angular action spring.

4. Hinge system (1) according to the preceding claim, in which the elastic return device (26) comprises at least one leaf spring.

5. Hinge system (1) according to one of the preceding claims, in which the elastic return device (26) comprises a first part (260) and a second part (262), the two parts forming an angle between them when the elastic return device (26) is not stressed, preferably an angle of less than 120°.

6. Hinge system (1) according to the preceding claim, wherein the first part (260) and the second part (262) have an identical length.

7. Hinge system (1) according to one of the preceding claims, in which a free edge of the support wall (280) located opposite the hook (24) comprises a rim (280a) allowing the elastic return device (26) to be positioned.

8. Hinge system (1) according to one of the preceding claims, wherein the retaining element (12) is integral with the first element (10), or removably mounted on the first element (10).

9. Hinge system (1) according to the preceding claim, in which the retaining element (12) has a straight cylindrical shape, in particular with a circular base.

10. Hinge system (1) according to one of the preceding claims, in which the first element (10) comprises two side walls (14) shaped to at least partially frame the second element (20), each side wall (14) comprising a cavity (140) configured to receive one end (122) of the retaining element (12).

11. Hinge system (1) according to the preceding claim, wherein the side walls (14) are configured to grip the second element (20) in the engagement configuration.

12. Hinge system (1) according to one of claims 10 and 11, in wherein the retaining element (12) comprises at least one central portion (121) having a smaller cross-section than the cross-section of the ends (122), the central portion (121) forming a bearing surface for the elastic return device (26), the retaining element (12) being rotatably mounted in the first element (10).

13. Hinge system (1) according to the preceding claim, wherein the central part (121) of the retaining element (12) has at least one flat (120).

14. Hinge system (1) according to one of claims 1 to 11, in which the retaining element (12) has at least one flat (120) forming a bearing surface for the elastic return device (26), the retaining element (12) being integral in rotation with the first element (10), the cooperation between the flat (120) and the elastic return device (26) making it possible to obtain an indexing of the first element (10) in a determined angular position relative to the second element (20).

15. Hinge system (1) according to the preceding claim, in which the retaining element (12) comprises two flats (120) of different orientations, so as to obtain two distinct indexed positions, corresponding for example respectively to the unfolded position and to the folded position.

16. Hinge system (1) according to one of the preceding claims, in which the second element comprises two half-parts (20a, 20b) assembled along a plane perpendicular to the axis of rotation of the first element (10).

17. Hinge system (1) according to the preceding claim, in which the second element (20) comprises an indexing element (280c) of the position of the elastic return device (26), for example a projecting element (280c) cooperating with a notch (264) formed in the elastic return device (26).

18. Hinge system (1) according to one of claims 1 to 7, in which the first element (10) comprises a lever (11) one end of which is integral with the retaining element (12), the lever (11) comprising, at an end opposite the retaining element (12), a fixing part (110), the second element (20) comprising a housing (28a) communicating with the cavity (28), the housing (28a) being configured to receive a part of the lever (11) and allow its rotation when the first and second elements (10, 20) are in the engagement configuration.

19. Glasses (2) comprising two arms (6) connected to a front (5), each arm (6) being articulated by means of a hinge system (1) according to one of the preceding claims, the unfolded and folded positions of each hinge system (1) corresponding respectively to the unfolded and folded positions of the respective arm (6).

20. Glasses (2) according to the preceding claim, in which each hinge system (1) is configured to allow an extension movement, that is to say a rotation movement of the corresponding branch (6), in a direction identical to the direction of rotation allowing passage from the folded position to the unfolded position, bringing the branch (6) beyond the unfolded position, the extension movement generating an elastic deformation of the elastic return device (26) under the action of the retaining element (12).

21. Glasses (2) according to the preceding claim, comprising a hinge system according to claim 8, in which the retaining element (12) moves, during the extension movement of the corresponding branch (6), along a bottom wall (282) of the cavity (28), the bottom wall (282) preferably having a convex part (282a).

22. Glasses (2) according to the preceding claim, in which the second element (20) comprises a rear part (200) comprising a clearance (206) configured to guide an inner edge (62) of the corresponding branch (6) during the extension movement.

23. Glasses (2) according to the preceding claim, in which the first element (10) and / or the corresponding branch (6) comprises an inner edge (62) comprising a projecting portion cooperating with the clearance (206) of the second element (20) during the extension movement.

24. Glasses (2) according to one of claims 19 to 23, in which, for each branch (6), the first element (10) of the corresponding hinge system is integral with the front (5), the second element (20) being integral with the branch (6).

25. Glasses (2) according to one of claims 19 to 23, in which, for each branch (6), the second element (20) of the corresponding hinge system (1) is integral with the branch (6), the first element (10) being integral with the front (5).

26. Glasses (2) according to one of claims 19 to 25, in which, for each branch (6), the second element (20) is configured such that the hook (24) is arranged on the inner side of the branch (6).

27. Glasses (2) according to one of claims 19 to 25, in which, for each branch (6), the second element (20) is configured such that the hook (24) is arranged on the outer side of the branch (6).

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