Riveted hinge structure spectacle frame and assembling method thereof

Abstract

The invention discloses a riveting type hinge structure spectacle frame and an assembling method thereof, and relates to the technical field of spectacles, the riveting type hinge structure spectacle frame comprises a spectacle frame, two spectacle legs and riveting parts, and first connecting parts are arranged at the two ends of the spectacle frame; a second connecting part is arranged at one end of each glasses leg; a positioning ring and limiting elastic pieces are arranged on the inner side wall of the first connecting part, a first mounting hole is coaxially formed in the positioning ring in a penetrating mode, two coaxially-arranged mounting rings are arranged on the inner side wall of the second connecting part, second mounting holes are coaxially formed in the mounting rings, the positioning ring is inserted between the two mounting rings, and the limiting elastic pieces are correspondingly arranged on the peripheries of the mounting rings. One ends of the limiting elastic pieces are fixed, the other ends of the limiting elastic pieces move, and the inner walls of the limiting elastic pieces make contact with the outer walls of the corresponding mounting rings; the riveting part is inserted into the first mounting hole and the second mounting hole which are coaxial at the same time, and the riveting part is fixed relative to the positioning ring and rotates relative to the mounting ring. The spectacle frame has the effect of improving the stability and durability of the spectacle frame.

Description

Technical Field

[0001] The present application relates to the technical field of glasses, and in particular to a glasses frame with a riveted hinge structure and an assembling method thereof. Background Art

[0002] Glasses are a device used to correct vision, protect the eyes or serve as decoration. They are mainly composed of lenses and frames. Lenses can be customized according to different vision needs, such as myopia, hyperopia, astigmatism, etc., making glasses suitable for all kinds of people. Nowadays, excessive use of eyes is very common, so glasses are playing an increasingly important role in real life.

[0003] In the history of the technological advancement of eyeglass frames, the traditional screw-fixed hinge design has always been the dominant design, mainly due to its excellent stability and durability. Eyeglass frames usually include frames and temples. Through the precise fixing of screws, the frames and temples form a complete eyeglass frame, which allows the eyeglass frame to fit the wearer's head tightly, ensuring that the glasses are not easy to shake or fall off during use, providing the wearer with a stable visual experience.

[0004] However, the traditional screw fixing design has also exposed some problems after long-term use. The first is the problem of screw loosening or falling off. Due to various factors such as vibration and oxidation in daily life, the screws may gradually lose their tightening force, which will damage the stability of the glasses frame, making the glasses uncomfortable to wear and even causing the temples to fall off. At the same time, the traditional screw fixing method cannot freely adjust the damping of the temple rotation according to the user's preferences. Summary of the invention

[0005] In order to improve the situation that the temples of eyeglass frames fixed by traditional screws are prone to loosening and the rotation damping of the temples cannot be adjusted, the present application provides a riveted hinge structure eyeglass frame and an assembly method thereof.

[0006] On the one hand, the present application provides a riveted hinge structure eyeglass frame, which adopts the following technical solution: A riveted hinge structure spectacle frame, comprising A mirror frame, wherein both ends of the mirror frame are provided with a first connecting portion; Two temples, each of which has a second connecting portion at one end, and the first connecting portion corresponds to the second connecting portion one by one; The inner side wall of the first connecting part is provided with a positioning ring and a limiting spring piece, the interior of the positioning ring is coaxially penetrated with a first mounting hole, the inner side wall of the second connecting part is provided with two spaced and coaxially arranged mounting rings, the interior of the mounting ring is coaxially provided with a second mounting hole, when the frame and the temples are assembled, the positioning ring is inserted between the two mounting rings, and the mounting ring is coaxial with the positioning ring, the limiting spring piece is correspondingly arranged at the outer periphery of the mounting ring away from the second connecting part, and surrounds the mounting ring, one end of the limiting spring piece is fixed, and the other end is movable and can move toward or away from the second connecting part, the inner wall of the limiting spring piece is in contact with the corresponding outer wall of the mounting ring, and when the movable end of the limiting spring piece moves, the limiting spring piece is tightly attached to or separated from the corresponding mounting ring; The riveted part is inserted into the coaxial first mounting hole and the second mounting hole at the same time, the riveted part is fixed relative to the positioning ring, and the mounting ring can rotate relative to the riveted part.

[0007] By adopting the above technical solution, a stable connection between the frame and the temple is achieved through the plug-in cooperation of the positioning ring and the mounting ring. The limiting spring piece is correspondingly arranged on the outer periphery of the mounting ring away from the second connecting part, and surrounds the mounting ring. One end of the limiting spring piece is fixed, and the other end is movable and can move toward or away from the second connecting part. By moving the movable end of the limiting spring piece, its tightness with the mounting ring can be adjusted, thereby changing the damping size of the temple rotation to meet the different needs of users; the riveted part is inserted and inserted into the coaxial first mounting hole and the second mounting hole at the same time, the riveted part is fixed relative to the positioning ring, and the mounting ring can rotate relative to the riveted part. By fixing the riveted part and rotating the mounting ring, the temple can be flexibly rotated relative to the frame, while ensuring the stability of the connection.

[0008] Optionally, the riveted part includes a first riveted part, a second riveted part and a rotating shaft, the rotating shaft is inserted into a coaxial first mounting hole and a second mounting hole, the rotating shaft is coaxially penetrated with a riveted hole, the second riveted part is inserted into the riveted hole, a plug hole is coaxially opened inside the second riveted part, and one end of the first riveted part is inserted into the plug hole.

[0009] By adopting the above technical solution, through the cooperation of the first riveted piece, the second riveted piece and the rotating shaft, the stable connection and flexible rotation of the riveted part are achieved, so that the frame and the temples can be stably connected and rotated.

[0010] Optionally, the rotating shaft and the first mounting hole are in interference fit, and the second riveting piece and the riveting hole are in interference fit.

[0011] By adopting the above technical solution, the stability and tightness of the connection between the frame and the temples are enhanced through the interference fit between the rotating shaft and the first mounting hole, and between the second rivet piece and the riveting hole, thereby preventing the temples from loosening and falling off.

[0012] Optionally, a plurality of rings are arranged at intervals on the outer wall of the first riveted member located in the plug-in hole.

[0013] By adopting the above technical solution, the design of the clamping ring increases the friction between the first riveted part and the second riveted part, further improving the stability of the connection.

[0014] Optionally, the limiting spring piece is provided with a limiting protrusion protruding toward the mounting ring, and a plurality of concave limiting grooves are spaced apart on the outer circumference of the mounting ring. When the mounting ring rotates relative to the limiting spring piece, the limiting protrusion slides along the outer circumference of the mounting ring and is spaced apart and clamped in each limiting groove.

[0015] By adopting the above technical solution, when the mounting ring rotates relative to the limiting spring sheet, the limiting protrusions can slide along the outer circumference of the mounting ring and be intermittently clamped in the limiting grooves. The cooperation between the limiting protrusions and the limiting grooves achieves the limitation of the rotation angle of the temples and prevents damage caused by excessive rotation.

[0016] Optionally, a slider is provided at one movable end of the limiting spring piece, the slider is slidably connected in the first connecting part, and can move toward or away from the second connecting part. An adjusting screw is threadedly connected to the position of the slider inside the first connecting part, and a cam is coaxially fixed to one end of the adjusting screw located inside the first connecting part. The cam is located on the side of the slider away from the second connecting part, and the cam is in contact with the slider.

[0017] By adopting the above technical solution, the cam can be driven to rotate by rotating the adjusting screw rod, thereby pushing the slider to move, thereby adjusting the movable end of the limiting spring piece, and then adjusting the tightness of the contact between the limiting spring piece and the mounting ring.

[0018] Optionally, an elastic member is provided on a side of the slider away from the cam, and two ends of the elastic member are respectively connected to the slider and an inner wall of the slider corresponding to the first connecting portion.

[0019] By adopting the above technical solution, the elastic member provides a restoring force for the slider, so that the limiting spring piece can remain stable and easy to control during the adjustment process.

[0020] Optionally, the limiting spring piece is provided with a wear-resistant part on the periphery of the limiting protrusion.

[0021] By adopting the above technical solution, the wear-resistant part reduces the friction loss between the limiting spring piece and the mounting ring, thereby extending the service life of the limiting spring piece.

[0022] On the other hand, the present application provides a method for assembling a riveted hinge structure spectacle frame, to assemble the riveted hinge structure spectacle frame as described in any one of the above, comprising the following steps: S1: Connect the first connecting part on the frame to the second connecting part on the temple, and align the first mounting hole on the positioning ring to the second mounting hole on the mounting ring; S2: inserting the riveted part into the coaxial first mounting hole and the second mounting hole so that the riveted part is riveted and fixed with the positioning ring, and the mounting ring can rotate relative to the riveted part; S3: Move the movable end of the limit spring piece to adjust the contact tightness between the limit spring piece and the outer wall of the mounting ring to adjust the size of the rotation damping of the temple.

[0023] By adopting the above technical solution, the problems of loosening and falling off of screws in traditional eyeglass frames and the inability to adjust the damping size are solved by adopting riveting connection, setting adjustable limit springs and other technical means. The present application improves the stability and durability of the eyeglass frames, while improving the user experience, and has significant beneficial effects.

[0024] In summary, the present application includes at least one of the following beneficial effects: 1. The rivet connection is used to replace the traditional screw fixing method. The stability and tightness of the connection are enhanced through the design of interference fit and clamp ring, which effectively avoids the problem of screw loosening or falling off, thereby improving the stability and durability of the eyeglass frame; 2. By setting adjustable limit springs, sliders, cams and other adjustment mechanisms, users can freely adjust the damping size of the temple rotation and the limit of the rotation angle according to their personal preferences, meeting the needs of different users, preventing damage caused by excessive rotation, and improving the user experience; 3. A wear-resistant part is arranged on the limit spring piece to reduce the friction loss between the limit spring piece and the mounting ring, thereby extending the service life of the eyeglass frame and further improving the durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is an exploded schematic diagram showing the structure of the eyeglass frame in Example 1 of the present application; Figure 2 This is a structural schematic diagram showing the principle of the limiting spring piece in Example 1 of the present application; Figure 3 yes Figure 2 Schematic cross-sectional view at AA.

[0026] Explanation of the reference numerals: 1. frame; 11. first connecting portion; 111. positioning ring; 112. first mounting hole; 113. slide groove; 114. adjusting screw rod; 115. cam; 116. elastic member; 12. surrounding portion; 2. temple; 21. second connecting portion; 22. mounting ring; 221. second mounting hole; 222. limiting groove; 3. riveted portion; 31. first riveted member; 311. snap ring; 32. second riveted member; 321. plug-in hole; 33. rotating shaft; 331. riveted hole; 34. riveted cap; 4. limiting spring piece; 41. limiting protrusion; 42. wear-resistant member; 43. movable end; 44. slider. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-3 This application is described in further detail.

[0028] Embodiment 1: Embodiment 1 of the present application discloses a riveted hinge structure spectacle frame, referring to Figure 1 The riveted hinge structure eyeglass frame includes a frame 1, two temples 2 and a riveted portion 3, wherein both ends of the frame 1 are integrally formed with a first connection portion 11, and one end of the two temples 2 is provided with a second connection portion 21, the first connection portion 11 corresponds to the second connection portion 21, and various types of lenses can be embedded in the frame 1 to meet the needs of different groups of people. A positioning ring 111 is provided on the inner side wall of the first connection portion 11, wherein the positioning ring 111 is integrally formed and fixed with the first connection portion 11, and a first mounting hole 112 is coaxially penetrated inside the positioning ring 111, and the axis of the positioning ring 111 is perpendicular to the length extension direction of the first connection portion 11.

[0029] The inner side wall of the second connecting portion 21 is integrally formed with two mounting rings 22, which are spaced apart and coaxially arranged, and each mounting ring 22 has a second mounting hole 221 coaxially penetrated therein. When the frame 1 and the temple 2 are assembled, the positioning ring 111 is inserted between the two mounting rings 22, and the positioning ring 111 and the mounting ring 22 are coaxial. The riveted portion 3 is inserted into the coaxial first mounting hole 112 and the second mounting hole 221, and the riveted portion 3 is fixed relative to the positioning ring 111, while the mounting ring 22 can rotate relative to the riveted portion 3, so that the temple 2 can rotate relative to the frame 1, thereby realizing the opening and closing of the two temples 2.

[0030] Reference Figure 1Specifically, the riveting part 3 includes a first riveting piece 31, a second riveting piece 32 and a rotating shaft 33. During installation, the rotating shaft 33 is inserted into the coaxial first mounting hole 112 and the second mounting hole 221. The rotating shaft 33 and the first mounting hole 112 are interference fit, so that the rotating shaft 33 and the positioning ring 111 are riveted and fixed. At the same time, a riveting hole 331 is coaxially opened inside the rotating shaft 33, and then the second riveting piece 32 is inserted into the riveting hole 331 from one end of the rotating shaft 33. The second riveting piece 32 and the riveting hole 331 are interference fit, so that the second riveting piece 32 and the rotating shaft 33 are riveted and fixed. A plug hole 321 is coaxially opened inside the second riveting piece 32, and one end of the first riveting piece 31 is inserted into the plug hole 321.

[0031] In order to further enhance the connection and fastening degree between the first riveted part 31 and the second riveted part 32, a plurality of snap rings 311 are arranged at intervals on the outer wall of the first riveted part 31 located in the plug hole 321. The snap rings 311 can be made of rubber material. When plugged in, the snap rings 311 can be firmly pressed against the inner wall of the second riveted part 32, thereby enhancing the connection and fastening degree between the first riveted part 31 and the second riveted part 32. Similarly, the snap rings 311 can also be arranged on the outer wall of the second riveted part 32, so that the second riveted part 32 can be tightly riveted with the rotating shaft 33.

[0032] The first riveted piece 31 and the second riveted piece 32 are both integrally formed with a riveting cap 34 at one end away from each other. When the riveted portion 3 is assembled with the first connecting portion 11 and the second connecting portion 21, the riveting cap 34 is tightly pressed against the mounting ring 22, effectively preventing the first riveted piece 31 and the second riveted piece 32 from falling off.

[0033] Reference Figure 2 and Figure 3 The inner side wall of the first connecting portion 11 is also provided with a limiting spring piece 4, which is correspondingly arranged on the outer periphery of the mounting ring 22 away from the second connecting portion 21, and forms a semi-enclosed structure for the mounting ring 22. In the embodiment 1 of the present application, there is one limiting spring piece 4, which is located on the peripheral side of the upper mounting ring 22. An enclosing portion 12 is arranged outside the limiting spring piece 4, and the enclosing portion 12 is integrally formed with the first connecting portion 11. The enclosing portion 12 wraps the limiting spring piece 4 inside to protect the limiting spring piece 4. In other embodiments of the present application, there may be two limiting spring pieces 4, which are respectively arranged on the upper and lower sides of the positioning ring 111.

[0034] The limiting spring piece 4 is integrally formed with a limiting protrusion 41 protruding toward the mounting ring 22, and the outer periphery of the mounting ring 22 is provided with a plurality of concave limiting grooves 222 at intervals. When the mounting ring 22 rotates relative to the limiting spring piece 4, the limiting protrusion 41 can slide along the outer periphery of the mounting ring 22 and will be intermittently stuck in each limiting groove 222, so as to achieve temporary suspension of the temple 2 at a fixed angle. In order to increase the service life of the limiting spring piece 4 when rubbing against the mounting ring 22, a wear-resistant part 42 is fixed to the outer periphery of the limiting protrusion 41 of the limiting spring piece 4. The wear-resistant part 42 can be made of rubber material, and the wear-resistant part 42 is in direct frictional contact with the outer periphery of the mounting ring 22.

[0035] Reference Figure 2 and Figure 3 , one end of the limiting spring piece 4 is fixed on the inner wall of the surrounding part 12, and the other end is a movable end 43, and the movable end 43 can move in the surrounding part 12. A slider 44 is fixed to the movable end 43 of the limiting spring piece 4, and a slide groove 113 is provided on the inner wall of the first connecting part 11 corresponding to the slide groove 44, and the slider 44 is slidably connected in the slide groove 113. The opening direction of the slide groove 113 is parallel to the length direction of the first connecting part 11, and the slider 44 can slide in the first connecting part 11, and can move in the direction close to or away from the second connecting part 21. An adjusting screw 114 is penetrated and threadedly connected at a position corresponding to the slider 44 in the first connecting part 11, and a cam 115 is coaxially fixed to one end of the adjusting screw 114 located in the first connecting part 11, and the cam 115 is located on the side of the slider 44 away from the second connecting part 21, and the outer periphery of the cam 115 contacts the slider 44. In order to enable the slider 44 to return to its initial position during the assembly process, an elastic member 116 is provided on the side of the slider 44 away from the cam 115. The elastic member 116 can be a compression spring, and the two ends of the elastic member 116 are respectively fixed to the slider 44 and the inner wall of the slider 44 corresponding to the first connecting part 11.

[0036] When the damping of the rotation of the temple 2 needs to be adjusted, an external force can be applied to rotate the adjusting screw 114, and the adjusting screw 114 drives the cam 115 to rotate, and the rotating cam 115 pushes the slider 44 to move in the slide groove 113. If a larger damping is required, the slider 44 can be pushed to move toward the second connecting portion 21; otherwise, the slider 44 can be pushed to move away from the second connecting portion 21, thereby adjusting the contact tightness between the limiting spring sheet 4 and the mounting ring 22, and then adjusting the damping of the rotation of the temple 2.

[0037] The implementation principle of the riveted hinge structure eyeglass frame in Example 1 of the present application is as follows: the frame 1 and the temple 2 are firmly connected together by riveting the riveted part 3 with the first connecting part 11 and the second connecting part 21, thereby replacing the traditional screw fixing method and realizing screwless riveted hinge, which effectively avoids the problem of screw loosening or falling off. At the same time, the cam 115 is driven to rotate by the screw rod, driving the slider 44 and the movable end 43 of the limiting spring 4 to move, thereby adjusting the tightness of the contact between the limiting spring 4 and the mounting ring 22, and then adjusting the damping size of the rotation of the temple 2 to meet the wearing needs of different users.

[0038] Embodiment 2: Embodiment 2 of the present application discloses a method for assembling a riveted hinge structure spectacle frame, to assemble the riveted hinge structure spectacle frame as described in any one of the above, specifically comprising the following steps: S1: Connect the first connecting portion 11 on the frame 1 to the second connecting portion 21 on the temple 2, that is, insert the positioning ring 111 of the first connecting portion 11 into the mounting ring 22 on the second connecting portion 21, and make the first mounting hole 112 on the positioning ring 111 coaxially aligned with the second mounting hole 221 on the mounting ring 22; S2: Insert the riveted part 3 into the corresponding coaxial first mounting hole 112 and the second mounting hole 221, so that the riveted part 3 is riveted and fixed with the positioning ring 111, and the mounting ring 22 can rotate relative to the riveted part 3. Specifically, first insert the rotating shaft 33 into the first mounting hole 112 and the second mounting hole 221, so that the rotating shaft 33 is fixed relative to the positioning ring 111, insert the second riveted part 32 into the riveted hole 331 of the rotating shaft 33 from the bottom of the rotating shaft 33, and then insert the first riveted part 31 into the insertion hole 321 of the second riveted part 32, and then riveted and fixed, so as to realize the hinged connection between the frame 1 and the temple 2; S3: Rotate the adjusting screw 114 so that the adjusting screw 114 can drive the cam 115 to rotate. After the cam 115 rotates, it pushes the movable end of the limiting spring piece 4 to move, that is, after the cam 115 rotates, it pushes the slider 44 to move, and the slider 44 drives the movable end 43 of the limiting spring piece 4 to move, so as to adjust the tightness of the contact between the limiting spring piece 4 and the outer wall of the mounting ring 22, thereby adjusting the size of the rotation damping of the temple 2.

[0039] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A riveted hinge structure spectacle frame, characterized in that: include A mirror frame (1), wherein both ends of the mirror frame (1) are provided with a first connecting portion (11); Two temples (2), one end of each of the two temples (2) being provided with a second connecting portion (21), and the first connecting portion (11) and the second connecting portion (21) being in one-to-one correspondence; The inner side wall of the first connecting portion (11) is provided with a positioning ring (111) and a limiting spring sheet (4); a first mounting hole (112) is coaxially penetrated inside the positioning ring (111); the inner side wall of the second connecting portion (21) is provided with two spaced-apart and coaxially arranged mounting rings (22); a second mounting hole (221) is coaxially opened inside the mounting ring (22); when the frame (1) and the temple (2) are assembled, the positioning ring (111) is inserted between the two mounting rings (22), and the mounting rings (22) are connected to the inner side wall of the second connecting portion (21); 22) is coaxial with the positioning ring (111), the limiting spring piece (4) is correspondingly arranged on the outer periphery of the mounting ring (22) away from the second connecting portion (21) and surrounds the mounting ring (22), one end of the limiting spring piece (4) is fixed, and the other end is movable and can move toward or away from the second connecting portion (21), the inner wall of the limiting spring piece (4) is in contact with the outer wall of the corresponding mounting ring (22), and when the movable end of the limiting spring piece (4) moves, the limiting spring piece (4) and the corresponding mounting ring (22) are closely attached to or separated; A riveted portion (3), the riveted portion (3) being inserted into a coaxial first mounting hole (112) and a second mounting hole (221) at the same time, the riveted portion (3) being fixed relative to the positioning ring (111), and the mounting ring (22) being rotatable relative to the riveted portion (3).

2. The riveted hinge structure eyeglass frame according to claim 1, characterized in that: The riveted portion (3) comprises a first riveted part (31), a second riveted part (32) and a rotating shaft (33); the rotating shaft (33) is inserted into the coaxial first mounting hole (112) and the second mounting hole (221); a riveted hole (331) is coaxially formed through the rotating shaft (33); the second riveted part (32) is inserted into the riveted hole (331); a plug hole (321) is coaxially formed inside the second riveted part (32); and one end of the first riveted part (31) is inserted into the plug hole (321).

3. The riveted hinge structure eyeglass frame according to claim 2, characterized in that: The rotating shaft (33) and the first mounting hole (112) are in interference fit, and the second riveting piece and the riveting hole (331) are in interference fit.

4. The riveted hinge structure eyeglass frame according to claim 2, characterized in that: The outer wall of the first riveted component located in the plug hole (321) is provided with a plurality of loops of clamping rings (311) at intervals.

5. The riveted hinge structure eyeglass frame according to claim 1, characterized in that: The limiting spring piece (4) is provided with a limiting protrusion (41) protruding in the direction of the mounting ring (22); a plurality of inwardly concave limiting grooves (222) are spaced apart on the outer circumference of the mounting ring (22); when the mounting ring (22) rotates relative to the limiting spring piece (4), the limiting protrusion (41) slides along the outer circumference of the mounting ring (22) and is spaced apart and clamped in each limiting groove (222).

6. The riveted hinge structure eyeglass frame according to claim 5, characterized in that: A slider (44) is provided at one movable end of the limiting spring sheet (4); the slider (44) is slidably connected to the first connection portion (11) and is movable in a direction approaching or away from the second connection portion (21); an adjusting screw rod (114) is threadedly connected to a position corresponding to the slider (44) inside the first connection portion (11); a cam (115) is coaxially fixed to one end of the adjusting screw rod (114) located inside the first connection portion (11); the cam (115) is located on a side of the slider (44) away from the second connection portion (21), and the cam (115) is in contact with the slider (44).

7. The riveted hinge structure eyeglass frame according to claim 6, characterized in that: An elastic member (116) is provided on the side of the slider (44) away from the cam (115), and two ends of the elastic member (116) are respectively connected to the slider (44) and the inner wall of the slider (44) corresponding to the first connecting portion (11).

8. The riveted hinge structure spectacle frame according to claim 5, characterized in that: The limiting spring piece (4) is provided with a wear-resistant part (42) on the outer periphery of the limiting protrusion (41).

9. A method for assembling a riveted hinge structure eyeglass frame, characterized in that: Assembling the riveted hinge structure spectacle frame according to any one of claims 1 to 8 comprises the following steps: S1: plugging the first connecting portion (11) on the frame (1) into the second connecting portion (21) on the temple (2) correspondingly, and aligning the first mounting hole (112) on the positioning ring (111) and the second mounting hole (221) on the mounting ring (22) coaxially; S2: inserting the riveted portion (3) into the corresponding coaxial first mounting hole (112) and the second mounting hole (221), so that the riveted portion (3) and the positioning ring (111) are riveted and fixed, and the mounting ring (22) can rotate relative to the riveted portion (3); S3: moving the movable end of the limiting spring piece (4) to adjust the tightness of the contact between the limiting spring piece (4) and the outer wall of the mounting ring (22) so as to adjust the rotation damping of the temple (2).

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