Spectacle frame with screwless mechanical hinges, which is made of compressed titanium and high-density carbon fibre

Abstract

The invention relates to a spectacle frame comprising a pair of fixing systems (5) each forming a hinge, each fixing system (5) comprising a first arm (51) fixed to a rim (2) of the frame (1) and a second arm (52) fixed to a temple (4) of the frame, the second arm (52) comprising a distal element (53) intended to be inserted and held in a cavity (45) of the temple (4), the cavity being delimited by two plates (41, 42) secured to the temple (4), the plates (41, 42) holding the distal element (53) in a direction (AR1) transverse to the axis of the temple and allowing the temple (4) to rotate about the same transverse axis (AR1) by friction of the distal element (53) between the two plates (41, 42).

Description

[0001] Eyeglass frame with screwless mechanical hinges, made of compressed titanium and high-density carbon fiber

[0002] Scope of the invention

[0003] The field of the invention relates to that of spectacle frames and more generally to spectacles.

[0004] Technological background

[0005] Modern eyeglass frames have several limitations, particularly in terms of sturdiness, comfort, and longevity. The majority of frames on the market are made from materials such as acetate, metal alloys, or steel, which offer limited strength for a significant weight. Titanium frames do exist, but the titanium used is often not compressed, reducing durability and impact resistance. Furthermore, the hinges on modern frames are often secured with screws, requiring regular maintenance: screws can loosen over time, temples can become wobbly, and glasses may fall off during sudden movements, such as bending over or brushing teeth; the wearer must regularly visit their optician for frame maintenance.

[0006] Patent document EP0261094A2 relates to a screwless pivot hinge, which relies on the use of a pivot inserted into slots integrated into an internal cavity. This mechanism allows for a full 360-degree rotation, but it is based on a system of springs and pinch mechanisms, requiring regular manual adjustments due to wear over time.

[0007] Patent document EP1390799A1 describes a friction hinge equipped with a spring and screw system to regulate friction. This mechanism uses the compression of a spring to adjust the friction, resulting in the need for frequent adjustments as the spring wears.

[0008] Patent document EP4111255A1 describes a friction hinge mechanism using a polymer bushing (a type of bushing). This bushing is inserted into a cavity, and friction is maintained by the deformation of the bushing under the pressure of a pin. The patent emphasizes friction control through the roughness of the contacting surfaces, with adjustment achieved by deformation of the bushing.

[0009] Another drawback of current frames is the presence of screw-on nose pads, which also poses a risk of screws falling out and requires regular adjustments. This results in comfort and long-term usability issues for the user.

[0010] Summary of the invention

[0011] According to a first aspect, the invention relates to a spectacle frame comprising a pair of fastening systems each forming a hinge, each fastening system comprising a first arm fixed to a circle of the frame and a second arm fixed to a temple of the frame, said second arm comprising a distal element intended to be inserted and held in a cavity of the temple, said cavity being delimited by two plates attached to said temple, said plates ensuring the retention of the distal element in a direction transverse to the axis of the temple and allowing a rotation of said temple around the same transverse axis by friction of the distal element between the two plates.

[0012] One advantage is that it allows for a screwless and non-moving part frame. Another advantage is that the temples are held securely on the rims without requiring readjustment of the connection's tightness.

[0013] In one embodiment, each plate forms a friction washer. In another embodiment, the friction washer is fixed to the arm. It can be fixed, for example, by a welding operation.

[0014] In one embodiment, each plate is associated with a damping washer arranged between the plate and the distal element. This washer is also fixed, for example, by welding. In another embodiment, the damping washer is arranged between the plate and the distal element. It is secured by welding. Any other connection can be made within the scope of the invention, for example, by gluing. One advantage of the damping washer is that it absorbs a slight displacement along the axis transverse to that of the arm. This displacement thus facilitates the rotation of the arm around the distant element by friction.

[0015] In one embodiment, the transverse axis is perpendicular to the axis of the temple. In another embodiment, the transverse axis is oriented upwards when the frame is worn by an individual.

[0016] According to one embodiment, said damping washer is designed to distribute evenly the pressure exerted during the pivoting of the branch.

[0017] According to one embodiment, each fastening system forms a mechanical hinge whose arms define a fixed angle, preferably a right angle.

[0018] In one embodiment, the frame does not include screws. In another embodiment, the cavity of each temple, the plates and the distal element are configured to form a stop limiting the opening of the temple to a maximum angle of 90°, said stop ensuring axial alignment between the axis of a temple and the hinge arm.

[0019] According to one embodiment, the first arm is fixed to a circle by means of at least one rivet.

[0020] According to one embodiment, each circle includes at least one through opening on either side of the mount allowing the passage of a rivet to hold the first arm of the fastening system with each circle.

[0021] According to one embodiment, each circle is fitted with a metal cover to cover the two rivets on the front face of the glasses frame.

[0022] According to one embodiment, each fastening system is made of compressed titanium.

[0023] According to one embodiment, in which the friction washers or damping washers are made of compressed titanium.

[0024] According to one embodiment, the friction washers are manufactured from PA6 or PA11, ensuring controlled friction and wear resistance.

[0025] According to one embodiment, the branches are made of compressed titanium.

[0026] According to one embodiment, the rims and bridge of the frame are made of high-density carbon fibers with a density between 1500 and 3000 lines / mm² 2 According to one embodiment, the nose pads are made of silicone.

[0027] According to one embodiment, the frame comprises temples and hinges made of compressed titanium, said compressed titanium being obtained by a high-pressure compression process.

[0028] According to one embodiment, the branches and / or the fastening system is / are made of metal.

[0029] In one embodiment, nose pads are attached without screws. In another aspect, the present invention relates to a spectacle frame comprising screwless mechanical hinges and made of compressed titanium and high-density carbon fiber. This frame offers increased strength, optimal lightness, adaptability to most face shapes thanks to flexible yet robust hinges, and good durability due to the use of advanced materials.

[0030] The frame hinges consist of friction washers, allowing for controlled pivoting of the temples without the need for screws or springs. These hinges are designed to ensure lasting friction, even after extended use, thus eliminating the loosening problems often encountered with traditional frames. Furthermore, these hinges allow the temples to adjust perfectly to most face shapes, providing optimal comfort for the wearer.

[0031] In a preferred embodiment, the friction washers are made of compressed titanium and heat-treated, ensuring high strength and exceptional durability. This compressed titanium is subjected to a compression force of 500 tons, guaranteeing superior rigidity while maintaining remarkable lightness. Unlike competing frames made of uncompressed titanium, which do not conform properly to the contours of the ears, this compressed titanium allows the temples to be adjusted and held in place securely and precisely.

[0032] In another embodiment, the friction washers can be made from engineering polymers such as PA6 or PA11, offering good wear resistance and controlled friction. This embodiment is more economical while maintaining a high level of performance in terms of long-lasting friction. In a preferred embodiment, the hinge includes a damping washer positioned between the friction washer and the hinge arm. This damping washer, made of a specific polymer or metallic material—preferably titanium in our invention—distributes the pressure exerted during pivoting evenly, thus providing an ideal buffer interface. In one embodiment, the damping washer is fixed.By reducing component wear and improving the smoothness of movement, it ensures consistent and long-lasting friction, while maintaining high precision when opening and closing the temples. Thus, the open temple remains in the open position, and the closed temple remains in the closed position, regardless of the temple's angle (90°).

[0033] According to one embodiment, the hinge mechanism of the invention is designed to prevent the temple from opening beyond 90°, thanks to the precise interaction between the end of the temple, on the hinge side, and the hinge arm. When the temple reaches the maximum angle, the end abuts against the arm, ensuring perfect alignment between the temple and the hinge arm, thus guaranteeing stability, comfort, and optimal opening.

[0034] The material of choice for the frame front is carbon fiber, with a weave density of up to 3000 lines / mm 2 in a preferred embodiment (1500 lines / mm 2 (in another embodiment). This high density allows for increased structural rigidity while maintaining optimal lightness. This results in a robust frame, capable of withstanding impacts and daily wear, while remaining comfortable to wear.

[0035] The silicone nose pads are integrated into a screwless titanium structure, which is itself integrated into the carbon fiber face; thus eliminating any risk of the pads coming loose or falling off. They can be easily replaced when necessary, without requiring complex tools.

[0036] Finally, the frame is corrosion-resistant, thanks in particular to the use of compressed titanium, which guarantees maximum protection against rust. The user therefore has nothing to fear in humid environments such as rain or marine conditions, like days at the beach. Unlike patent document EP0261094A2, the invention described here uses neither a spring nor a complex mechanism requiring periodic readjustments. Instead, according to one embodiment, the invention includes a system of friction washers, made of compressed titanium or polymer, ensuring stable and durable friction without the need for maintenance. Furthermore, patent EP0261094A2 does not mention the use of compressed titanium or high-density carbon fiber, two materials which, in our invention, provide increased lightness and strength, optimizing both the comfort and durability of the frame.

[0037] Unlike patent document EP1390799A1, the present invention completely eliminates the use of springs and screws, significantly reducing maintenance requirements and the risk of mechanical failure. The friction washers we use ensure consistent and long-lasting friction without the need for adjustments. Furthermore, the compressed titanium structure and high-density carbon fiber face, which are absent from patent EP1390799A1, give our invention superior strength and lightness, making it more suitable for extended use without compromising quality.

[0038] Unlike the mechanism described in patent document EP4111255A1, the invention does not use a bushing system to maintain friction. The mechanism of the invention is more robust. Indeed, it is based on titanium or polymer friction washers that guarantee friction stability without requiring material deformation. Unlike the polymer bushing system, which relies on material deformation to create friction, the compressed titanium friction washers of our invention operate by maintaining constant pressure between the surfaces thanks to the natural strength of titanium. This material does not deform under pressure, which allows for stable friction over time, without any variation in performance.Durability is ensured by the absence of moving parts subject to rapid wear, and titanium, due to its high strength, guarantees increased longevity without requiring regular adjustments or maintenance. Furthermore, the compressed titanium used in our invention offers significantly higher rigidity and strength than the polymers used in patent document EP4111255A1. Finally, the addition of carbon fiber to the frame front, which provides both lightness and strength, is another distinctive feature not found in previously developed solutions.

[0039] In a preferred embodiment, the frame's manufacture involves a technical process based on the use of compressed titanium and high-density carbon fiber, combined with a screwless hinge mechanism designed to ensure exceptional durability. This process aims to guarantee the frame's robustness, lightness, comfort, and adaptability to most face shapes.

[0040] The temples and hinges of the frame are made of compressed titanium, a material prized for its lightness, mechanical strength, and durability. The titanium used is initially selected as high-purity raw blocks. These blocks are then subjected to a high-pressure compression process, reaching 500 tons, which reduces their volume while increasing their density and strength. This compression process improves the titanium's crystalline structure, making it more rigid and resistant to torsion, while retaining sufficient flexibility to ensure optimal comfort during everyday use. Unlike the standard titanium used by competitors, which is often too flexible, this compressed titanium allows the temples to stay securely on the wearer's ears, preventing slippage, while also offering the possibility of adjusting the temple shape for a personalized fit.Once compressed, the titanium is cut and machined using high-precision CNC machines to obtain the specific shapes of the temples and hinges, adapted to the user's anatomy. The resulting titanium temple is able to deform consistently when pressure is applied, without breaking.

[0041] The hinges of this frame, crucial to its functionality, are distinguished by the absence of screws, eliminating the risk of loosening and loss of parts and significantly increasing the component's lifespan. These hinges are designed using a friction washer system, where two washers made of compressed titanium or reinforced polymer, such as PA6 or PA11, or even steel in another embodiment, are inserted between the moving parts. Each hinge consists of three main components: the titanium temples, which form the support elements; the central titanium pivot, which connects the temple to the frame front; and the friction washers, inserted on either side of the pivot, ensuring smooth and controlled rotation of the temples without the need for screws or springs, as in existing solutions.The friction washers undergo a precision polishing process, ensuring smooth and uniform contact surfaces, which allows for optimal control of friction between the hinge components. This mechanism gives the mount long-term durability, preventing the premature wear frequently seen in spring or screw hinges.

[0042] The frame front, which supports the corrective lenses, is made of high-density carbon fiber, woven at 1500 fiber lines per square millimeter. This density gives the front increased rigidity while maintaining optimal lightness. In another embodiment, a density of 3000 lines per square millimeter can be used to further enhance mechanical strength while retaining the flexibility necessary to adapt to various face shapes. According to one embodiment, the front is manufactured by layering sheets of carbon fiber pre-impregnated with epoxy resin, which are then placed in a specially designed mold to create the desired shape. This mold is then subjected to a hot compression process, where the resin hardens and consolidates the carbon fibers, forming a lightweight yet strong structure.After hardening, the frame is cut with extreme precision to accommodate prescription lenses, then polished to a smooth, seamless finish. The connection points for the temples and hinges are reinforced with compressed titanium inserts, ensuring maximum strength in these critical areas.

[0043] The silicone nose pad is inserted into a precise opening in the titanium frame, which is itself integrated into the carbon fiber faceplate. The titanium frame has a central opening perfectly adapted to the shape of the pad. The silicone pad, slightly larger than the opening, has protrusions or enlarged sections on either side of the titanium opening. When inserted, the central part of the pad passes through the opening, while the larger sections of the pad, located on either side of the opening, expand and lock the pad in place, preventing any unintentional movement or removal. This mechanism ensures that the pad remains securely in place while providing optimal comfort for the user. The silicone, being flexible yet durable, perfectly conforms to the shape of the opening and adjusts to ensure a long-lasting and stable fit.Other materials besides silicone can be used in other embodiments of this invention. The front of the carbon fiber frame is designed with a small rectangular cavity specifically intended to house the titanium system for holding the silicone nose pad. This cavity, subtly integrated into the frame's structure, allows the titanium support to fit perfectly without protruding or altering the frame's smooth and clean aesthetic. The cavity's base is flat, and its dimensions are precisely adapted to the contours of the titanium support. The walls of the rectangular cavity provide a solid bearing surface, ensuring stable and durable attachment of the titanium system. Once inserted, the titanium support fits perfectly into the cavity, with only the opening for the silicone nose pad visible on the surface.This design allows for discreet integration of the system while maximizing the robustness and rigidity of the whole, thus ensuring that the nose plate remains perfectly in place, without risk of play or movement over time.

[0044] To ensure a strong connection between the carbon fiber front and the titanium temples, specially designed rivets are used. Each rivet is inserted into a pre-drilled hole and secured with a special heat- and vibration-resistant adhesive. This method guarantees maximum strength while maintaining a sleek, minimalist look. The hinges are then cold-assembled, with the central pivot and friction washers inserted without the use of screws or tensioning systems, allowing for a perfect and lasting fit. In a preferred embodiment, the rivets are coated with an aesthetic gold finish, providing the frame with a stylish and refined look.

[0045] The nose pads, made of hypoallergenic medical-grade silicone for optimal comfort and durability, are integrated directly into the frame without the use of screws. The nose pads are secured with internal clips anchored to the titanium structure, eliminating the risk of accidental loss and allowing for easy replacement when worn. These pads can be adjusted to fit the user's face shape, ensuring a secure and comfortable fit, even after extended use.

[0046] Once assembly is complete, each frame undergoes a series of rigorous quality control tests. These tests include torsional and tensile strength tests, ensuring the frame can withstand intensive daily use without deforming. Corrosion tests are also performed, simulating high-humidity and high-heat environments to verify resistance to rust and corrosion, which is particularly crucial for outdoor use, whether in rainy weather or at the beach. Friction tests are conducted on the hinges to ensure the friction mechanism remains smooth and effective after thousands of opening and closing cycles. This quality control process ensures that each frame meets the highest standards of quality and performance, guaranteeing exceptional durability.

[0047] The frame's construction, using this preferred method, combines robust yet flexible compressed titanium, suitable for most face shapes, with high-density carbon fiber to offer optimal lightness and strength. The screwless assembly, with friction washer and pivot hinges, and integrated nose pads, ensures an uncompromising user experience while eliminating frequent adjustments and premature wear.

[0048] List of figures

[0049] FIG. 1: The branch and the screwless hinge (female part);

[0050] FIG. 2: The face of the mount and the hinge arm, side view;

[0051] FIG. 3: The face of the mount and the hinge arm, top view;

[0052] FIG. 4: The front of the frame and the hinge with the temple, lateral-superior view;

[0053] FIG. 5: The face of the mount and the hinge, side view;

[0054] FIG. 6: The front of the frame and the left nose pad, postero-internal view; FIG. 7: The front of the frame and the hinge;

[0055] FIG.8: Top view of an example of the mount of the invention;

[0056] FIG.9: Front view of an example of the mount of the invention;

[0057] FIG.10: an example of an embodiment of a fastening system of the invention, FIG.11: an example of an embodiment of a frame arm comprising an opening and the two plates according to the invention.

[0058] Detailed description of the figures: Figure 1 illustrates an embodiment of a left lateral view of a left arm 4 (female part), without a male hinge arm, using friction washers 41, 42 made of titanium in a preferred embodiment, or of another metal, or of polymer. The compressed titanium hinge 5 connects the arm 4 to the front face of the carbon fiber frame (see Figure 8).

[0059] ■ 46: welding of the washer onto the upper face of the opening 45 (or cavity) made through the branch 4,

[0060] ■ 41, 42: washer, belonging to the branch (female part) ■ 45: gap (in the case of a hinge split into two parts: a male part and a female part) or opening made through the branch 4,

[0061] ■ 42: sub-washer, or damping washer, or buffer washer, allowing controlled and fluid contact between the hinge arm and the branch.

[0062] ■ 48: front end of the branch allowing the integrated stop system when the latter butts on the hinge arm in the fully open position, designed so as to limit the opening of the branch to a maximum angle of 90°, ensuring perfect alignment between the branch and the hinge arm.

[0063] Figure 3 illustrates an embodiment of a three-quarter left side view of the front-left portion of the frame 1. It shows the positioning of the rivets 54 on the front face of the frame 1, and the division of the hinge arm 5 into a part that supports the male part, and the male part itself, which constitutes the central pivot of the mechanism. The central pivot is also referred to as the distal element 53.

[0064] ■ 54: rivet

[0065] ■ 2: Carbon face of a circle of the mount

[0066] ■ 52: hinge arm, support for the male part

[0067] ■ 53: distal element of the second arm 52 of the hinge, male part (central pivot).

[0068] Figure 3 illustrates an embodiment of a lateral top view of the front-left portion of the frame 1, without the temple body. It shows the positioning of the rivets 54 on the rear face of the frame 1, and the shape of the hinge arm 5, which includes the distal element 53, forms the central pivot of the hinge mechanism 5. In a preferred embodiment, the distal element 53 of the arm 52, forming the pivot (male part of the hinge arm), is slightly offset laterally relative to the axis extending from the arm 52 of the hinge 5.

[0069] ■ 1: front of the mount

[0070] ■ 54: rivet

[0071] ■ 52: hinge arm, support for the male part

[0072] ■ 53: distal element of the arm 52 of the hinge, male part (central pivot).

[0073] Figure 4 illustrates a top lateral view of an embodiment of the front-left part of the frame, with the temple body 4, illustrating the hinge 5. It demonstrates the positioning of the rivets 54 on the rear face of the frame face 1, the shape of the hinge arm including the central pivot 41 of the hinge mechanism 5, and the temple body 4. The temple body 4 shows a cavity 45 (shown in Figures 1 and 11) at its end near the hinge 5, within which the upper and lower faces of the cavity 45 in the hinge 5 are each welded to a friction washer 41, 42, itself extended by a damping washer 47 (Figure 5), or vice versa depending on the embodiment, allowing a smooth and controlled interface with the pivot of the distal element 53 (of the hinge arm 52).In one alternative, the damping washer 47 is placed between the friction washer 41, 42 and the inner surface of the cavity in the arm 4 so as to form a rigid assembly. In one embodiment, a symmetrical configuration on either side of the cavity 45 allows the distal end (or distal element) 53, forming the pivot, of the hinge 5 to be received between two friction washers 41, 42. The friction washers 41, 42 are damped by the damping washers 47. Such a configuration allows the arm 4 to be held securely on the distal element 53 of the hinge 5 while permitting rotation of the arm 4 around the transverse axis ARi.

[0074] Each friction washer 41, 42 and damping washer 47 is slightly wider than the central pivot to ensure smooth circular sliding. The friction washers 41, 42 are thus positioned on either side of the distal element forming the central pivot, providing sustained friction (pressure in opposite directions and along the direction of rotation of the pivot) without the need for a spring or screws. The drawing also includes arrows indicating the possible rotational movement of the temple relative to the frame face (see Figures 4 and 10).

[0075] The notations for this embodiment in Figure 4 indicate: ■ 1: mount

[0076] ■ 54: rivet

[0077] ■ 52: hinge arm, support for the male part.

[0078] Figure 5 illustrates a left side view of one embodiment of the front-left part of the frame, illustrating the hinge mechanism between the temple and the hinge arm.

[0079] The notations for this embodiment in Figure 54 indicate: ■ 1: mount

[0080] ■ 2: circle of the front face of the mount

[0081] ■ 52: hinge arm

[0082] ■ 48: front end of the branch allowing the integrated stop system when the latter butts on the hinge arm in the fully open position, designed so as to limit the opening of the branch to a maximum angle of 90°, ensuring perfect alignment between the branch and the hinge arm.

[0083] ■ 4: branch

[0084] ■ 42: friction washer

[0085] ■ 47: damping washer, or buffer washer.

[0086] Figure 6 illustrates a postero-internal view of one embodiment of the frame face, illustrating the mechanism used in a preferred embodiment for the nose pads.

[0087] ■ 1, 2: frame and circle of the front face of the frame

[0088] ■ 32: Titanium system integrated into the front of the frame and forming a cavity to receive the nose pad

[0089] ■ 31: nose pad, preferably made of silicone, inserted into a cavity in the titanium system.

[0090] ■ 33: rectangular cavity.

[0091] Figure 7 is a postero-internal view of the right side of the face of the mount, illustrating the titanium system receiving the paquette.

[0092] ■ 1,2: mount and face of the mount

[0093] ■ 33: rectangular cavity ■ 32: titanium system integrated into the face of the frame by the rectangular cavity 33, and which itself has a cavity at its end to receive the nose pad.

[0094] Figure 8 shows a front view of an example of the frame of the invention in which are shown the two rims 2 of the front face of the frame and a bridge 3 as well as the nose pads 31. Metal covers 59 allow the ends of the rivets on the front face of the frame 1 to be hidden or concealed. The rims 2 of the front face of the frame 1 each accommodate a lens 10.

[0095] Figure 9 shows a top view of an example of the frame of the invention in which the two arms 4 are shown as well as the fastening systems 5, the nose pads 31 and the nose pad holders 32.

[0096] Figure 10 represents an example of the implementation of a fixing system 5 allowing a frame circle 2 to be fixed with a branch 4.

[0097] Figure 11 shows an example of an embodiment of a branch 4 comprising an opening 45 (or cavity) and two plates 41 and 42 defining friction washers. The damping washers 47 are not shown in this figure.

[0098] References:

[0099] 1: Mount

[0100] 2: Front face circle of the mount

[0101] 3: bridge

[0102] 4: branch

[0103] 5: fastening system, hinge

[0104] 10: lens housed in the front face circle of the frame

[0105] 31: nose pad

[0106] 32: plate holder

[0107] 33: rectangular cavity

[0108] 41: Friction plate / washer participating in the pivot

[0109] 42: friction plate / washer 45: cavity

[0110] 46: Weld the washer onto the upper face of the opening. 47: Damping washer

[0111] 48: anterior end of the branch

[0112] 51: first arm

[0113] 52: second arm

[0114] 53: distal element participating in the central pivot

[0115] 54: rivet

[0116] 59: metal cover

[0117] AR1: transverse axis

Claims

DEMANDS 1. Eyeglass frame (1) comprising a pair of fastening systems (5) each forming a hinge, each fastening system (5) comprising a first arm (51) fixed to a circle (2) on the front face of the frame (1) and a second arm (52) fixed to a temple (4) of the frame (1), said second arm (52) comprising a distal element (53) intended to be inserted and held in a cavity (45) of the temple (4), said cavity (45) being delimited by two plates (41, 42) integral with said temple (4), said plates (41, 42) ensuring the retention of the distal element (53) in a transverse direction (ARi) to the axis of the temple and allowing a rotation of said temple (4) around the same transverse axis (ARi) by friction of the distal element (53) between the two plates (41, 42).

2. Eyeglass frame (1) according to claim 1, characterized in that each plate (41, 42) forms a friction washer.

3. Eyeglass frame (1) according to any one of the preceding claims, characterized in that each plate (41, 42) is associated with a damping washer (47) arranged between the plate (41, 42) and the distal element (53).

4. Eyeglass frame (1) according to claim 3, characterized in that said damping washer (47) is designed to distribute evenly the pressure exerted during the pivoting of the arm.

5. Eyeglass frame (1) according to any one of the preceding claims, characterized in that each fixing system forms a mechanical hinge (5) whose first and second arms (51, 52) define a fixed angle, preferably a right angle.

6. Eyeglass frame (1) according to any one of claims 1 to 5, characterized in that it does not include a screw.

7. Eyeglass frame (1) according to any one of the preceding claims, characterized in that the cavity (45) of each temple (4), the platforms (41, 42) and the distal element (53) are configured to form a stop limiting the opening of the temple to a maximum angle of 90°, said stop ensuring axial alignment between the axis of a temple and the arm of the hinge.

8. Eyeglass frame (1) according to claim 7, characterized in that each circle (2) of the front face of the frame comprises at least one through opening on both sides of the front face of the frame, allowing the passage of a rivet (54) to hold said first arm (51) of the fastening system (5) with each circle (2).

9. Eyeglass frame (1) according to claim 7, characterized in that each circle (2) of the front face of the frame is provided with a metal cover (59) allowing to cover the two rivets (54) on the front face of the eyeglass frame (1).

10. Eyeglass frame (1) according to claim 1, characterized in that each fastening system (5) is made of compressed titanium.

11. Eyeglass frame (1) according to claim 10 in combination with claims 2 and 3, characterized in that the plates (41, 42) or the damping washers (47) are made of compressed titanium.

12. Eyeglass frame (1) according to claim 10 in combination with claims 2 and 3, characterized in that the plates (41, 42) are made of PA6 or PA11, guaranteeing controlled friction and resistance to wear.

13. Eyeglass frame (1) according to any one of the preceding claims, characterized in that the front rims (2) of the frame and a bridge (3) of the frame (1) are made of high-density carbon fibers having a density of between 1500 and 3000 lines / mm² 2 .

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