Gapless glasses elastic hinge structure and glasses
The eyeglasses feature a seamless, flexible hinge structure that solves the problems of hair trapping and dirt buildup caused by gaps in traditional eyeglass hinges, resulting in greater wearing comfort, aesthetics, and lifespan.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHENZHEN GACOTECH CO LTD
- Filing Date
- 2026-02-10
- Publication Date
- 2026-05-15
AI Technical Summary
The gaps in the existing flexible hinge structure of eyeglasses cause hair to get caught and dirt to accumulate, affecting wearing comfort and aesthetics.
A gapless elastic hinge structure for eyeglasses is designed. Through the cooperation of the annular sleeve, the arc segment, the intermediate shaft, and the connecting segment, the temple of the eyeglasses is ensured to rotate without gaps during the unfolding process. In the abutting state, the elastic element provides restoring elasticity through deformation, thus avoiding the formation of gaps.
It completely eliminates the problem of hair getting caught in the gaps, improves wearing comfort and convenience, prevents dirt buildup, maintains the appearance of the glasses, extends their service life, and improves rotational stability and reset effect.
Smart Images
Figure CN122043782A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of eyeglass structure technology, specifically relating to a gapless eyeglass elastic hinge structure and eyeglasses. Background Technology
[0002] As a common device for correcting vision, protecting the eyes, or for aesthetic purposes, eyeglasses prioritize comfort and fit. Due to differences in head size and facial contours among users, traditional fixed-angle eyeglass hinges are difficult to fit all types of people. Wearing them can result in either excessive tightness causing pressure on the head or excessive looseness leading to slippage. Prolonged wear may also cause discomfort in the ears and temples.
[0003] To address the aforementioned issues of fit and comfort, existing technologies have incorporated flexible optimization designs for eyeglass hinges. The core improvement is to enable the temples to expand further outward and have elastic return capabilities after being extended to the standard wearing angle (approximately 90°), thereby adapting to the width differences of different head shapes, improving the fit and comfort during wear, and avoiding unpleasant experiences caused by clamping too tightly or too loosely.
[0004] However, current flexible hinges are all designed based on a fixed hinge axis. This means that the installation and function of the elastic components (such as springs and elastic sheets) are all achieved around this fixed axis, and the temples of the glasses rotate and open / close around this hinge axis. For example... Figure 1 As shown, in the actual design process, when the temple of the glasses is rotated to the conventional wearing position of 90°, in order to ensure that it can be further expanded outward to meet the adaptation needs of different head shapes, a certain gap must be reserved between the eyeglass stud (the part connecting the frame and the hinge) and the temple of the glasses. This gap serves as the extra stroke margin for the temple of the glasses to compensate for the displacement space during elastic expansion, and to avoid rigid collision between the stud and the temple of the glasses, which could lead to damage to the hinge or failure to expand outward normally.
[0005] While the aforementioned reserved gap design can meet the outward expansion travel requirements of the elastic hinge, it introduces new technical drawbacks: On the one hand, during daily wearing and removing of glasses, this gap easily traps the user's hair, especially short or stray hairs, causing pain and affecting wearing comfort and convenience. Repeated trapping over a long period can also lead to hair breakage, severely reducing the user experience. On the other hand, the existence of this gap creates a cleaning dead zone. Dust, sebum, sweat, and other dirt from the air easily accumulate in the gap during daily use, making it difficult to clean. This not only breeds bacteria but also affects the overall aesthetics of the glasses, reducing the product's usability and lifespan.
[0006] To date, there is no effective solution in the existing technology that can balance the adaptability requirements of flexible hinges with the drawbacks caused by gaps. Therefore, how to design a hinge that can both allow the temples to expand outwards to adapt to different head shapes and avoid problems such as hair trapping and dirt accumulation caused by the reserved gaps has become a technical problem that urgently needs to be solved in the field of eyeglass hinges. Summary of the Invention
[0007] To address the problem of hair getting caught and dirt accumulating due to the pre-existing gaps in existing eyeglass hinges, this invention provides a gapless eyeglass hinge structure and eyeglasses.
[0008] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: On one hand, the present invention provides a gapless eyeglass elastic hinge structure, including a post, a temple, a first connecting part, a second connecting part, and an elastic element. One of the first connecting part and the second connecting part is connected to the post, and the other of the first connecting part and the second connecting part is connected to the temple. The first connecting part is provided with an annular sleeve. The elastic element includes an arc-shaped segment, a connecting segment, and an intermediate shaft. The intermediate shaft is located at the center of the arc-shaped segment. The connecting segment connects one end of the arc-shaped segment and the intermediate shaft. The arc-shaped segment is rotatably embedded in the annular sleeve. The intermediate shaft is connected to the second connecting part; as the temple of the glasses unfolds from the folded state to approximately 90°, the arc-shaped segment rotates in the annular sleeve, and the relative position of the intermediate shaft and the arc-shaped segment remains unchanged. When the temple of the glasses is unfolded to approximately 90°, the end of the temple of the glasses abuts against the end of the post head; when the temple of the glasses expands further from approximately 90°, the end of the temple of the glasses remains in abutting against the end of the post head, and the intermediate shaft is displaced relative to the arc-shaped segment by the second connecting part, and the elastic element undergoes elastic deformation to provide elasticity that limits the further expansion of the temple of the glasses.
[0009] Optionally, the arc segment, the connecting segment, and the intermediate shaft form an integrally molded e-shaped structure. When the temple of the glasses expands further outward from approximately 90°, the intermediate shaft moves toward the other end closer to the arc segment, so that the elastic element undergoes elastic deformation.
[0010] Optionally, the first connecting portion further includes a damping element, wherein the elastic element abuts against the damping element to provide rotational damping as the temple of the glasses unfolds from a folded state to approximately 90°.
[0011] Optionally, the damping element is an annular structure and is embedded in the inner wall of the annular sleeve. The arc-shaped segment is embedded in the damping element. In its natural state, the outer diameter of the arc-shaped segment is smaller than the inner diameter of the damping element. When the arc-shaped segment is embedded in the damping element, the arc-shaped segment undergoes radial elastic deformation to provide pressure between the outer wall of the arc-shaped segment and the damping element, thereby forming a damping effect.
[0012] Optionally, the damping component and the annular sleeve are integrally formed, or the damping component and the annular sleeve are independent structures, and the damping component is a plastic component.
[0013] Optionally, the damping element is disc-shaped and located on the side of the elastic element. The side of the arc-shaped segment is provided with a protrusion. When the temple of the glasses unfolds from a folded state to approximately 90°, the protrusion abuts against the damping element to provide rotational damping.
[0014] Optionally, the second connecting part includes a connecting seat and two hinge discs. The connecting seat connects to the temple of the eyeglasses. The two hinge discs are arranged parallel and spaced apart on the connecting seat. The annular sleeve is located between the two hinge discs. The two ends of the intermediate shaft are respectively rotatably connected to the two hinge discs.
[0015] Optionally, each of the hinge discs is provided with a cover and a fixing block. The fixing block is located on the inner side of the hinge disc, and the cover is located on the outer side of the hinge disc. A fixing post is provided on the cover, which passes through the hinge disc and is inserted into the edge of the fixing block. A square hole is provided on the fixing block. Both ends of the intermediate shaft are square structures, and both ends of the intermediate shaft are respectively inserted into the square holes of the two fixing blocks.
[0016] Optionally, the elastic element is selected from metal springs or non-metal springs, and the metal spring is selected from one of zirconium-based amorphous alloy springs, copper-based amorphous alloy springs, iron-based amorphous alloy springs, magnesium-based amorphous alloy springs, and titanium-based amorphous alloy springs.
[0017] In another aspect, the present invention provides eyeglasses, including the gapless eyeglass elastic hinge structure described above.
[0018] The gapless eyeglasses elastic hinge structure provided by the present invention, through the design of the annular sleeve of the first connecting part cooperating with the arc-shaped segment, intermediate shaft, and connecting segment of the elastic element, ensures that when the temple is unfolded to approximately 90° in the folded state, the arc-shaped segment rotates stably within the annular sleeve, and the relative position of the intermediate shaft and the arc-shaped segment remains unchanged, ensuring a smooth unfolding process. When the temple is unfolded to approximately 90°, the end of the temple abuts against the end of the post, completely eliminating the gap set in the prior art to reserve the outward expansion stroke. This fundamentally avoids the problem of hair getting caught in the gap when wearing or removing the glasses, improving wearing comfort and convenience. At the same time, it prevents dirt and grime from accumulating in the gap, maintains the overall appearance of the glasses, reduces bacterial growth, and extends the product's service life. When the temples of the glasses expand outward from approximately 90°, they remain in contact with the headstock. The second connecting part drives the relative displacement of the arc-shaped section of the intermediate shaft, causing the elastic element to undergo elastic deformation and providing a return elasticity. This achieves elastic expansion to adapt to different head sizes and meet the needs of wearing fit, while maintaining a gap-free state and completely avoiding the various drawbacks caused by existing gaps. In addition, the arc-shaped section of the elastic element cooperates with the annular sleeve, which provides stronger rotational stability and more reliable elastic return effect compared to the traditional fixed shaft structure. The overall structural design is simple, easy to process and assemble, and reduces production and manufacturing costs. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the structure of an elastic hinge in the prior art; Figure 2 This is a schematic diagram of the gapless eyeglass elastic hinge structure provided by the present invention; Figure 3 This is an exploded view of the gapless eyeglass elastic hinge structure provided by the present invention; Figure 4 This is a schematic diagram of the gapless eyeglasses elastic hinge structure provided by the present invention when unfolded to approximately 90°; Figure 5 This is a schematic diagram of the gapless eyeglasses elastic hinge structure provided by the present invention, which is further expanded outward by approximately 90°.
[0020] The reference numerals in the accompanying drawings are as follows: 1. Pile head; 2. Eyeglass temple; 3. First connecting part; 31. Annular sleeve; 32. Damping element; 4. Second connecting part; 41. Connecting seat; 42. Hinge plate; 43. Cover; 431. Fixing post; 44. Fixing block; 441. Square hole; 5. Elastic element; 51. Arc-shaped segment; 52. Intermediate shaft; 53. Connecting section. Detailed Implementation
[0021] To make the technical problems solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
[0022] See Figures 2-5 As shown, this embodiment of the invention provides a gapless eyeglass elastic hinge structure, including a head 1, a temple 2, a first connecting part 3, a second connecting part 4, and an elastic element 5. One of the first connecting part 3 and the second connecting part 4 is connected to the head 1, and the other of the first connecting part 3 and the second connecting part 4 is connected to the temple 2. The first connecting part 3 is provided with an annular sleeve 31. The elastic element 5 includes an arc-shaped segment 51, a connecting segment 53, and an intermediate shaft 52. The intermediate shaft 52 is located at the center of the arc-shaped segment 51. The connecting segment 53 connects one end of the arc-shaped segment 51 and the intermediate shaft 52. The arc-shaped segment 51 is rotatably embedded in the annular sleeve 31. The intermediate shaft 52 is connected to the second connecting part 4. When the temple 2 is unfolded from a folded state to approximately 90°, the arc-shaped segment 51 rotates in the annular sleeve 31, and the relative position of the intermediate shaft 52 and the arc-shaped segment 51 remains unchanged. Figure 4 As shown, when the temple 2 is extended to approximately 90°, the end of the temple 2 abuts against the end of the post 1; Figure 5 As shown, when the temple 2 expands further outward from approximately 90°, the end of the temple 2 remains in contact with the end of the head 1, and the intermediate shaft 52 is displaced relative to the arc segment 51 by the second connecting part 4, and the elastic member 5 undergoes elastic deformation to provide elasticity that limits the further outward expansion of the temple 2.
[0023] The gapless eyeglasses elastic hinge structure is designed to work in conjunction with the annular sleeve 31 of the first connecting part 3 and the arc-shaped segment 51, intermediate shaft 52, and connecting segment 53 of the elastic element 5. This design ensures that when the temple 2 is unfolded to approximately 90° in the folded state, the arc-shaped segment 51 rotates stably within the annular sleeve 31, and the relative position of the intermediate shaft 52 and the arc-shaped segment 51 remains unchanged, ensuring a smooth unfolding process. When the temple 2 is unfolded to approximately 90°, the end of the temple 2 abuts against the end of the post 1, completely eliminating the gaps in the prior art that are designed to allow for outward expansion. This fundamentally avoids the problem of hair getting caught in the gaps when wearing or removing the glasses, improving wearing comfort and convenience. At the same time, it prevents dirt and grime from accumulating in the gaps, maintains the overall aesthetics of the glasses, reduces bacterial growth, and extends the product's lifespan. When the temple 2 expands further outward from approximately 90°, the temple 2 remains in contact with the head 1. The second connecting part 4 drives the intermediate shaft 52 to shift relative to the arc-shaped segment 51, causing the elastic element 5 to undergo elastic deformation and provide a reset elasticity. This achieves elastic expansion to adapt to different head sizes and meet the wearing fit requirements, while maintaining a gap-free state and completely avoiding the various drawbacks caused by existing gaps. In addition, the arc-shaped segment 51 of the elastic element 5 cooperates with the annular sleeve 31, which has stronger rotational stability and more reliable elastic reset effect compared to the traditional fixed shaft structure. The overall structure design is simple, easy to process and assemble, and reduces production and manufacturing costs.
[0024] In some embodiments, the arc segment 51, the connecting segment 53, and the intermediate shaft 52 form an integrally formed e-shaped structure. When the temple 2 expands further outward from approximately 90°, the intermediate shaft 52 moves toward the other end closer to the arc segment 51, so that the elastic member 5 undergoes elastic deformation.
[0025] Setting the arc segment 51, connecting segment 53 and intermediate shaft 52 as an integrally formed E-shaped structure not only simplifies the processing technology of the elastic component 5, reduces the number of parts, and lowers the assembly difficulty and production cost, but also improves the structural strength and overall rigidity of the elastic component 5, avoids problems such as breakage and failure after long-term repeated deformation of the elastic component 5, and extends the service life of the elastic component 5 and the stability of the hinge structure.
[0026] Meanwhile, the E-shaped structure design allows the intermediate axis 52 to precisely shift towards the other end of the curved segment 51 when the temple 2 expands outward, ensuring that the deformation direction of the elastic element 5 is controllable and the deformation amplitude is uniform. This makes the elastic restoring force provided by the elastic element 5 more stable and precise, avoiding situations such as jamming or poor restoring when the temple 2 expands outward, and improving the feel and fit when wearing the glasses. In addition, the one-piece molded structure is conducive to the transmission of elastic force, maintaining high elasticity without increasing the volume, which is beneficial to the miniaturization of the hinge structure.
[0027] In some embodiments, the first connecting portion 3 further includes a damping member 32, which abuts against the elastic member 5 to provide rotational damping as the temple 2 unfolds from a folded state to approximately 90°.
[0028] The damping element 32 provides stable rotational damping as the temple 2 unfolds from its folded state to approximately 90°, effectively suppressing irregular swaying of the temple 2. This allows the temple 2 to hover stably at any angle within the rotation range, preventing accidental contact that could cause sudden rotation and improving wearing safety and ease of operation. Unlike traditional damping, the damping element 32 directly contacts the elastic element 5, resulting in a longer service life, better stability, and a wider tolerance for installation errors. Because the elastic element 5 itself is elastic, the pressure between the elastic element 5 and the damping element 32 is kept moderate due to the elasticity of the elastic element 5. This avoids excessive pressure leading to severe wear or insufficient pressure leading to inadequate damping. Furthermore, even after the damping element 32 experiences some wear, the adaptive deformation of the elastic element 5 maintains a certain damping effect, resulting in better damping retention after wear and a higher dimensional tolerance during installation.
[0029] like Figure 3 As shown, in some embodiments, the damping element 32 is an annular structure and is embedded in the inner wall of the annular sleeve 31. The arc-shaped segment 51 is embedded in the damping element 32. The outer diameter of the arc-shaped segment 51 in its natural state is smaller than the inner diameter of the damping element 32. When the arc-shaped segment 51 is embedded in the damping element 32, the arc-shaped segment 51 undergoes radial elastic deformation to provide pressure between the outer wall of the arc-shaped segment 51 and the damping element 32, thereby forming a damping effect.
[0030] The damping element 32 is set as a ring structure and embedded in the inner wall of the ring sleeve 31, so that the arc segment 51 is embedded in the damping element 32. The structure is compact, does not occupy extra space, and does not affect the overall gapless effect and aesthetic appearance of the hinge.
[0031] By setting the outer diameter of the arc segment 51 in its natural state to be smaller than the inner diameter of the damping element 32, the arc segment 51 undergoes radial elastic deformation after being embedded in the damping element 32. This creates a stable pressure between the outer wall of the arc segment 51 and the damping element 32, achieving a damping effect. This damping structure requires no additional elastic components or fixing structures, making it simple and reliable. The damping effect can be precisely controlled by adjusting the dimensional difference between the arc segment 51 and the damping element 32, adapting to different users' needs for the rotation feel. Simultaneously, the radial deformation of the arc segment 51 and the elastic deformation of the temple 2 during expansion are independent and do not interfere with each other, ensuring the stability of the damping effect without affecting the adaptability of the elastic expansion. Furthermore, the annular damping element 32 fully fits the arc segment 51, providing uniform damping and preventing localized jamming when the temple 2 unfolds, further improving the operating feel.
[0032] like Figure 3 As shown, in some embodiments, the damping element 32 and the annular sleeve 31 are independent structures, and the damping element 32 is a plastic part.
[0033] Compared to other materials, using plastic parts as damping components 32 provides stable damping. Specifically, plastics with wear-resistant properties can be selected, such as polyoxymethylene, nylon, polycarbonate, polyurethane, polytetrafluoroethylene, polyamide, polysulfone, polyetheretherketone, polybutylene terephthalate, polyphenylene sulfide, etc. Fillers or fibers can also be added to the plastic parts to provide reinforcement.
[0034] In other embodiments, the damping element 32 may also be a metal part or a metal-plastic composite material.
[0035] In other embodiments, the damping element 32 and the annular sleeve 31 can also be integrally formed, and the same cylindrical structure can simultaneously perform the functions of the damping element 32 and the annular sleeve 31.
[0036] In other embodiments (not shown), the damping element is disc-shaped and located on the side of the elastic element. The side of the arc-shaped segment is provided with a protrusion. When the temple of the glasses unfolds from a folded state to approximately 90°, the protrusion abuts against the damping element to provide rotational damping.
[0037] like Figure 3 As shown, in some embodiments, the second connecting part 4 includes a connecting seat 41 and two hinge discs 42. The connecting seat 41 is connected to the temple 2. The two hinge discs 42 are arranged parallel to each other on the connecting seat 41. The annular sleeve 31 is located between the two hinge discs 42. The two ends of the intermediate shaft 52 are respectively rotatably connected to the two hinge discs 42.
[0038] The annular sleeve 31 is located between the two hinge discs 42, and the two ends of the intermediate shaft 52 are connected to the two hinge discs 42 with restricted rotation. This symmetrical design of the double hinge discs can provide stable support and positioning for the intermediate shaft 52, ensuring that the displacement direction of the intermediate shaft 52 is accurate and stable when it drives the elastic element 5 to deform, avoiding deviation or tilting, and thus ensuring uniform deformation and reliable reset of the elastic element 5. At the same time, it can protect the mating structure of the annular sleeve 31 and the arc segment 51, preventing the entry of external dust and impurities, reducing wear, and extending the service life of the hinge. The connection method between the connecting seat 41 and the temple 2 is simple and reliable, easy to assemble and disassemble, and convenient for later maintenance. In addition, the structure of the double hinge discs can improve the overall rigidity and structural strength of the second connecting part 4, preventing problems such as loosening and deformation of the temple 2 after long-term use, ensuring the stability and service life of the hinge structure, and further optimizing the force distribution of the hinge, so that the force when the temple 2 expands outward is evenly transmitted to the elastic element 5, improving the fitting experience.
[0039] In some embodiments, each hinge disc 42 is provided with a cover 43 and a fixing block 44. The fixing block 44 is located inside the hinge disc 42, and the cover 43 is located outside the hinge disc 42. A fixing post 431 is provided on the cover 43. The fixing post 431 passes through the hinge disc 42 and is inserted into the edge of the fixing block 44. A square hole 441 is provided on the fixing block 44. Both ends of the intermediate shaft 52 are square structures, and the two ends of the intermediate shaft 52 are respectively inserted into the square holes 441 of the two fixing blocks 44.
[0040] In some embodiments, the elastic element 5 is selected from metal springs or non-metal springs, and the metal spring is selected from one of zirconium-based amorphous alloy springs, copper-based amorphous alloy springs, iron-based amorphous alloy springs, magnesium-based amorphous alloy springs, and titanium-based amorphous alloy springs.
[0041] In a preferred embodiment, the elastic element 5 is selected from zirconium-based amorphous alloys.
[0042] Zirconium-based amorphous alloys boast high strength, with a tensile strength of 800-1500 MPa, 2.5 times that of 316 stainless steel and 1.5 times that of titanium alloys. This allows for thinner and lighter hinge designs, reducing component weight and improving wearer comfort. The high strength also ensures the glasses won't deform during long-term use, enhancing their overall quality. Furthermore, the Vickers hardness of zirconium-based amorphous alloys is 440-540 Hv, far exceeding that of stainless steel and titanium alloys, resulting in less wear during use. It also doesn't deform or lose elasticity over extended periods. The elastic deformation rate of zirconium-based amorphous alloys is 0.6-1.5%, six times higher than 316 stainless steel, offering better elasticity and improved wearing comfort.
[0043] Another embodiment of the present invention provides eyeglasses including the gapless eyeglass elastic hinge structure described above.
[0044] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A gapless eyeglass elastic hinge structure, characterized in that, The device includes a post head, an eyeglass temple, a first connecting part, a second connecting part, and an elastic element. One of the first and second connecting parts is connected to the post head, and the other of the first and second connecting parts is connected to the eyeglass temple. The first connecting part is provided with an annular sleeve. The elastic element includes an arc-shaped segment, a connecting segment, and an intermediate shaft. The intermediate shaft is located at the center of the arc-shaped segment. The connecting segment connects one end of the arc-shaped segment and the intermediate shaft. The arc-shaped segment is rotatably embedded in the annular sleeve. The intermediate shaft is connected to the second connecting part. During the process of unfolding the temple from a folded state to approximately 90°, the arc-shaped segment rotates within the annular sleeve, while the relative position of the intermediate shaft and the arc-shaped segment remains unchanged. When the temple is unfolded to approximately 90°, the end of the temple abuts against the end of the post. When the temple further expands outward from approximately 90°, the end of the temple remains in contact with the end of the post, and the intermediate shaft is displaced relative to the arc-shaped segment by the second connecting portion. The elastic element undergoes elastic deformation to provide elasticity that limits further outward expansion of the temple.
2. The gapless eyeglass elastic hinge structure according to claim 1, characterized in that, The arc-shaped segment, the connecting segment, and the intermediate shaft form an integrally molded E-shaped structure. When the temple of the glasses expands further outward from approximately 90°, the intermediate shaft moves toward the other end closer to the arc-shaped segment, causing the elastic element to undergo elastic deformation.
3. The gapless eyeglass elastic hinge structure according to claim 1, characterized in that, The first connecting part also includes a damping element, which abuts against the elastic element to provide rotational damping as the temple of the glasses unfolds from a folded state to approximately 90°.
4. The gapless eyeglass elastic hinge structure according to claim 3, characterized in that, The damping element is an annular structure and is embedded in the inner wall of the annular sleeve. The arc-shaped segment is embedded in the damping element. In its natural state, the outer diameter of the arc-shaped segment is smaller than the inner diameter of the damping element. When the arc-shaped segment is embedded in the damping element, the arc-shaped segment undergoes radial elastic deformation to provide pressure between the outer wall of the arc-shaped segment and the damping element, thereby forming a damping effect.
5. The gapless eyeglass elastic hinge structure according to claim 4, characterized in that, The damping component and the annular sleeve are integrally formed, or the damping component and the annular sleeve are independent structures, and the damping component is a plastic component.
6. The gapless eyeglass elastic hinge structure according to claim 3, characterized in that, The damping element is disc-shaped and located on the side of the elastic element. The side of the arc-shaped segment is provided with a protrusion. When the temple of the glasses is unfolded from the folded state to approximately 90°, the protrusion abuts against the damping element to provide rotational damping.
7. The gapless eyeglass elastic hinge structure according to claim 1, characterized in that, The second connecting part includes a connecting seat and two hinge discs. The connecting seat connects to the temple of the eyeglasses. The two hinge discs are arranged parallel and spaced apart on the connecting seat. The annular sleeve is located between the two hinge discs. The two ends of the intermediate shaft are respectively connected to the two hinge discs in a rotationally restricted manner.
8. The gapless eyeglass elastic hinge structure according to claim 7, characterized in that, Each hinge disc is provided with a cover and a fixing block. The fixing block is located on the inner side of the hinge disc, and the cover is located on the outer side of the hinge disc. A fixing post is provided on the cover. The fixing post passes through the hinge disc and is inserted into the edge of the fixing block. A square hole is provided on the fixing block. Both ends of the intermediate shaft are square structures, and the two ends of the intermediate shaft are respectively inserted into the square holes of the two fixing blocks.
9. The gapless eyeglass elastic hinge structure according to claim 1, characterized in that, The elastic element is selected from metal springs or non-metal springs, and the metal spring is selected from one of zirconium-based amorphous alloy springs, copper-based amorphous alloy springs, iron-based amorphous alloy springs, magnesium-based amorphous alloy springs, and titanium-based amorphous alloy springs.
10. A pair of eyeglasses, characterized in that, Includes the gapless eyeglass elastic hinge structure as described in any one of claims 1 to 9.