A riveted hinge structure eyeglass frame and method of assembly

Abstract

The application discloses a riveting type hinge structure spectacle frame and an assembling method thereof, relates to the technical field of spectacles, and comprises a spectacle frame, two spectacle legs and a riveting part, the two ends of the spectacle frame are each provided with a first connecting part, one end of each of the two spectacle legs is provided with a second connecting part, an inner side wall of the first connecting part is provided with a positioning ring and a limiting elastic sheet, a first mounting hole is coaxially and internally formed in the positioning ring, an inner side wall of the second connecting part is provided with two coaxially arranged mounting rings, a second mounting hole is coaxially formed in the mounting rings, the positioning ring is inserted between the two mounting rings, the limiting elastic sheet is correspondingly arranged on the outer periphery of the mounting ring and surrounds the mounting ring, one end of the limiting elastic sheet is fixed, the other end is movable, and the inner wall of the limiting elastic sheet is in contact with the outer wall of the corresponding mounting ring; the riveting part is inserted into the coaxial first mounting hole and second mounting hole, the riveting part is fixed relative to the positioning ring and rotates relative to the mounting ring. The application 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, in particular to a riveted hinge structure glasses frame and an assembling method thereof. BACKGROUND

[0002] Glasses are devices used for correcting vision, protecting eyes or as decoration, mainly composed of lenses and frames, and the lenses can be customized according to different vision needs, such as myopia, hypermetropia, astigmatism, etc., so that glasses can be suitable for all kinds of people. Today, overuse of eyes is a very common phenomenon, so glasses also play an increasingly important role in real life.

[0003] In the process of technological progress of glasses frames, the traditional screw fixed hinge design has always been the dominant position, mainly due to its excellent stability and durability. The glasses frame usually includes a frame and a temple, and the frame and the temple are fixed by screws to form a complete glasses frame, so that the glasses frame can closely fit the wearer's head, ensuring that the glasses are not easy to shake or fall off during use, providing a stable visual experience for the wearer.

[0004] But the traditional screw fixed design also exposes some problems in long-term use, first of all, the problem of loose or falling off of the screw, due to various factors such as vibration, oxidation in daily life, the screw may gradually lose the fastening force, so that the stability of the glasses frame is damaged, causing the glasses to be uncomfortable to wear or even the temple to fall off. At the same time, the traditional screw fixed way cannot freely adjust the damping size of the temple rotation according to the user's preference. SUMMARY

[0005] In order to improve the situation that the glasses frame using the traditional screw fixed way is prone to loose temple and cannot adjust the damping of the temple rotation, the present application provides a riveted hinge structure glasses frame and an assembling method thereof.

[0006] In one aspect, the present application provides a riveted hinge structure glasses frame, which adopts the following technical scheme:

[0007] A riveted hinge structure glasses frame, comprising

[0008] a frame, the frame is provided with a first connecting part at both ends;

[0009] two temples, one end of the two temples is provided with a second connecting part, and the first connecting part and the second connecting part correspond one by one;

[0010] The inner side wall of the first connecting part is provided with a positioning ring and a limiting spring sheet, a first mounting hole is coaxially and internally provided in the positioning ring, the inner side wall of the second connecting part is provided with two mounting rings which are spaced and coaxially arranged, a second mounting hole is coaxially and internally provided in the mounting ring, when the frame and the leg 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 sheet 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 sheet is fixed and the other end is movable and can move towards or away from the second connecting part, the inner wall of the limiting spring sheet is in contact with the outer wall of the corresponding mounting ring, and when the movable end of the limiting spring sheet moves, the limiting spring sheet is in close contact or separated from the corresponding mounting ring.

[0011] A riveting part is inserted into the coaxial first mounting hole and second mounting hole, the riveting part is fixed relative to the positioning ring, and the mounting ring can rotate relative to the riveting part.

[0012] By adopting the above technical scheme, the stable connection of the frame and the leg is realized through the insertion and cooperation of the positioning ring and the mounting ring. The limiting spring sheet 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 sheet is fixed and the other end is movable and can move towards or away from the second connecting part. By moving the movable end of the limiting spring sheet, the tightness of the limiting spring sheet and the mounting ring can be adjusted, thereby changing the damping size of the leg rotation to meet different needs of users; the riveting part is inserted into the coaxial first mounting hole and second mounting hole, the riveting part is fixed relative to the positioning ring, and the mounting ring can rotate relative to the riveting part. Through the fixation of the riveting part and the rotation of the mounting ring, the flexible rotation of the leg relative to the frame is realized, and the stability of the connection is ensured.

[0013] Optionally, the riveting part includes a first riveting piece, a second riveting piece and a rotating shaft, the rotating shaft is inserted into the coaxial first mounting hole and second mounting hole, the rotating shaft is coaxially and internally provided with a riveting hole, the second riveting piece is inserted into the riveting hole, the second riveting piece is coaxially and internally provided with an insertion hole, and one end of the first riveting piece is inserted into the insertion hole.

[0014] By adopting the above technical scheme, through the cooperation of the first riveting piece, the second riveting piece and the rotating shaft, the stable connection and flexible rotation of the riveting part are realized, so that the frame and the leg can be stably connected and rotated.

[0015] Optionally, the rotating shaft is in interference fit with the first mounting hole, and the second riveting piece is in interference fit with the riveting hole.

[0016] By adopting the technical scheme, the interference fit between the rotating shaft and the first mounting hole and the interference fit after the second riveting piece and the riveting hole are adopted, the stability and tightness of the connection between the frame and the leg are enhanced, and the problems of loosening and falling off of the leg are prevented.

[0017] Optionally, the first riveting piece is arranged at intervals between the outer walls in the plug-in hole.

[0018] By adopting the technical scheme, the design of the snap ring increases the friction between the first riveting piece and the second riveting piece, and further improves the stability of the connection.

[0019] Optionally, the limiting spring plate is provided with a limiting protrusion protruding towards the mounting ring, and the mounting ring is provided with a plurality of concave limiting grooves at intervals on the outer periphery, and when the mounting ring rotates relative to the limiting spring plate, the limiting protrusion slides along the outer periphery of the mounting ring and is arranged in each limiting groove at intervals.

[0020] By adopting the technical scheme, when the mounting ring rotates relative to the limiting spring plate, the limiting protrusion can slide along the outer periphery of the mounting ring and be arranged in each limiting groove at intervals, and the cooperation of the limiting protrusion and the limiting groove realizes the limiting of the rotating angle of the leg, and prevents damage caused by excessive rotation.

[0021] Optionally, the movable end of the limiting spring plate is provided with a sliding block, the sliding block is slidingly connected in the first connecting part and can move towards or away from the second connecting part, a adjusting screw is threadedly connected in the first connecting part corresponding to the position of the sliding block, and a cam is coaxially fixed to one end of the adjusting screw in the first connecting part, the cam is located on the side of the sliding block away from the second connecting part, and the cam contacts the sliding block.

[0022] By adopting the technical scheme, by rotating the adjusting screw, the cam can be rotated to push the sliding block to move, thereby adjusting the movable end of the limiting spring plate, and further adjusting the tightness of the contact between the limiting spring plate and the mounting ring.

[0023] Optionally, the side of the sliding block away from the cam is provided with an elastic member, and the two ends of the elastic member are respectively connected with the sliding block and the inner wall of the first connecting part corresponding to the sliding block.

[0024] By adopting the technical scheme, the elastic member provides a restoring force for the sliding block, so that the limiting spring plate can be kept stable and easy to control during adjustment.

[0025] Optionally, the limiting spring plate is provided with a wear-resistant member around the limiting protrusion.

[0026] By adopting the technical scheme, the wear-resistant member reduces the friction loss between the limiting spring plate and the mounting ring, and prolongs the service life of the limiting spring plate.

[0027] In another aspect, the application provides a riveting hinge structure eyeglass frame assembly method for assembling the riveting hinge structure eyeglass frame as claimed in any one of the preceding aspects, comprising the following steps:

[0028] S1: The first connecting part on the frame is inserted into the second connecting part on the temple, and the first mounting hole on the positioning ring is coaxially aligned with the second mounting hole on the mounting ring;

[0029] S2: The riveting part is inserted into the coaxial first mounting hole and the second mounting hole, so that the riveting part is riveted and fixed with the positioning ring, and the mounting ring can rotate relative to the riveting part;

[0030] S3: Move the movable end of the limiting spring, adjust the tightness of the contact between the limiting spring and the outer wall of the mounting ring, and adjust the size of the damping of the temple rotation.

[0031] By adopting the above technical scheme, by adopting the riveting connection, setting the adjustable limiting spring and other technical means, the problems of screw loosening, falling off and unable to adjust the damping size of the traditional eyeglass frame are solved. The application improves the stability and durability of the eyeglass frame, and improves the user experience, which has significant beneficial effects.

[0032] In summary, the application includes at least one of the following beneficial effects:

[0033] 1. Riveting connection is used instead of traditional screw fixing method, the stability and tightness of the connection are enhanced by interference fit and snap ring design, effectively avoiding the problem of screw loosening or falling off, thereby improving the stability and durability of the eyeglass frame;

[0034] 2. By setting the adjustable limiting spring and slider, cam and other adjusting mechanisms, users can freely adjust the damping size and rotation angle limit of the temple rotation according to personal preferences, meet the needs of different users, and prevent damage caused by excessive rotation, improve user experience;

[0035] 3. A wear-resistant part is provided on the limiting spring to reduce friction loss between the limiting spring and the mounting ring, prolong the service life of the eyeglass frame, and further improve the durability. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is an exploded schematic view of the eyeglass frame structure of the embodiment 1 of the application;

[0037] Figure 2 is a structural schematic view of the limiting spring principle of the embodiment 1 of the application;

[0038] Figure 3 is Figure 2 a cross-sectional view at A-A.

[0039] Explanation of reference numerals in the attached drawings: 1. Frame; 11. First connecting part; 111. Positioning ring; 112. First mounting hole; 113. Slide groove; 114. Adjusting screw; 115. Cam; 116. Elastic element; 12. Enclosure part; 2. Temple; 21. Second connecting part; 22. Mounting ring; 221. Second mounting hole; 222. Limiting groove; 3. Riveting part; 31. First riveting element; 311. Snap ring; 32. Second riveting element; 321. Insertion hole; 33. Rotating shaft; 331. Riveting hole; 34. Riveting cap; 4. Limiting spring; 41. Limiting protrusion; 42. Wear-resistant part; 43. Movable end; 44. Slider. Detailed Implementation

[0040] The following is in conjunction with the appendix Figures 1-3 This application will be described in further detail.

[0041] Example 1:

[0042] Embodiment 1 of this application discloses a riveted hinge structure eyeglass frame, referring to... Figure 1 The riveted hinged eyeglass frame includes a frame 1, two temples 2, and a riveting part 3. Both ends of the frame 1 have an integrally formed first connecting part 11, while one end of each temple 2 has a second connecting part 21. The first connecting part 11 and the second connecting part 21 correspond one-to-one. Various types of lenses can be fitted into the frame 1 to meet the needs of different people. A positioning ring 111 is provided on the inner sidewall of the first connecting part 11, which is integrally formed and fixed to the first connecting part 11. The positioning ring 111 has a first mounting hole 112 coaxially extending through its interior, and the axis of the positioning ring 111 is perpendicular to the length extension direction of the first connecting part 11.

[0043] The inner wall of the second connecting part 21 has two integrally formed mounting rings 22. These two mounting rings 22 are spaced apart and coaxially arranged, and each mounting ring 22 has a second mounting hole 221 coaxially extending through its interior. 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 riveting part 3 is inserted into the coaxial first mounting hole 112 and second mounting hole 221. The riveting part 3 is fixed relative to the positioning ring 111, while the mounting ring 22 can rotate relative to the riveting part 3, allowing the temple 2 to rotate relative to the frame 1, thereby realizing the opening and closing of the two temples 2.

[0044] Reference Figure 1Specifically, the riveting part 3 includes a first riveting member 31, a second riveting member 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, and the rotating shaft 33 is in interference fit with the first mounting hole 112, so that the rotating shaft 33 is riveted and fixed with the positioning ring 111. At the same time, a riveting hole 331 is coaxially and internally provided in the rotating shaft 33, and then the second riveting member 32 is inserted into the riveting hole 331 from one end of the rotating shaft 33, and the second riveting member 32 is in interference fit with the riveting hole 331, so that the second riveting member 32 is riveted and fixed with the rotating shaft 33. The second riveting member 32 is internally and coaxially provided with a plug-in hole 321, and one end of the first riveting member 31 is inserted into the plug-in hole 321.

[0045] In order to further enhance the connection and fastening degree between the first riveting member 31 and the second riveting member 32, a plurality of clamping rings 311 are arranged on the outer wall of the first riveting member 31 in the plug-in hole 321, and the clamping rings 311 can be made of rubber material. During plugging, the clamping rings 311 can be tightly abutted against the inner wall of the second riveting member 32, thereby enhancing the firmness of the connection between the first riveting member 31 and the second riveting member 32. Similarly, the clamping rings 311 can also be arranged on the outer wall of the second riveting member 32, so that the second riveting member 32 can be tightly riveted with the rotating shaft 33.

[0046] The first riveting member 31 and the second riveting member 32 are integrally formed with a riveting cap 34 at the end away from each other, and when the riveting part 3 is assembled with the first connecting part 11 and the second connecting part 21, the riveting cap 34 is abutted against the mounting ring 22, thereby effectively preventing the first riveting member 31 and the second riveting member 32 from falling off.

[0047] Referring to Figure 2 and Figure 3 , the inner side wall of the first connecting part 11 is further provided with a limiting spring sheet 4, the limiting spring sheet 4 is correspondingly arranged at the outer periphery of the mounting ring 22 away from the second connecting part 21, and forms a semi-enclosing structure for the mounting ring 22. In the embodiment 1 of the present application, the limiting spring sheet 4 is provided with one, and is located at the upper side of the mounting ring 22. The limiting spring sheet 4 is externally provided with an enclosing part 12, the enclosing part 12 is integrally formed with the first connecting part 11, and the enclosing part 12 wraps the limiting spring sheet 4 inside to protect the limiting spring sheet 4. In other embodiments of the present application, the limiting spring sheet 4 can be provided with two, which are correspondingly arranged at the upper and lower sides of the positioning ring 111.

[0048] The limiting spring 4 is integrally formed with a limiting protrusion 41 protruding towards the mounting ring 22, and the outer periphery of the mounting ring 22 is spaced apart with a plurality of limiting recesses 222, when the mounting ring 22 rotates relative to the limiting spring 4, the limiting protrusion 41 can slide along the outer periphery of the mounting ring 22, and will be intermittently clamped into each limiting recess 222, so as to realize the temporary hovering of the temple 2 at a fixed angle. In order to enhance the service life of the limiting spring 4 and the mounting ring 22 when rubbing, a wear-resistant piece 42 is fixed on the outer periphery of the limiting protrusion 41 of the limiting spring 4, and the wear-resistant piece 42 can be made of rubber material, and the wear-resistant piece 42 is directly in frictional contact with the outer periphery of the mounting ring 22.

[0049] With reference to Figure 2 and Figure 3 , one end of the limiting spring 4 is fixed on the inner wall of the surrounding part 12, and the other end is a movable end 43 which can move in the surrounding part 12. The movable end 43 of the limiting spring 4 is fixed with a sliding block 44, and the inner wall of the first connecting part 11 corresponding to the sliding block 44 is provided with a sliding groove 113, the sliding block 44 is slidingly connected in the sliding groove 113, and the sliding groove 113 is provided in a direction parallel to the length direction of the first connecting part 11, and the sliding block 44 can slide in the first connecting part 11 and can move towards or away from the second connecting part 21. A adjusting screw 114 is threaded connected through the position corresponding to the sliding block 44 in the first connecting part 11, one end of the adjusting screw 114 coaxially fixed with a cam 115 in the first connecting part 11, the cam 115 is located on the side of the sliding block 44 away from the second connecting part 21, and the outer periphery of the cam 115 is in contact with the sliding block 44. In order to make the sliding block 44 return to the initial position during assembly, a elastic piece 116 is arranged on the side of the sliding block 44 away from the cam 115, and the elastic piece 116 can be a compression spring, and the two ends of the elastic piece 116 are respectively fixed with the sliding block 44 and the inner wall of the first connecting part 11 corresponding to the sliding block 44.

[0050] When it is necessary to adjust the damping size of the rotation of the temple 2, an external force can be applied to rotate the adjusting screw 114, the adjusting screw 114 drives the cam 115 to rotate, and the rotating cam 115 pushes the sliding block 44 to move in the sliding groove 113. If the damping needs to be larger, the sliding block 44 can be pushed to move towards the second connecting part 21; otherwise, the sliding block 44 can be pushed to move away from the second connecting part 21, so as to adjust the contact tightness between the limiting spring 4 and the mounting ring 22, and further adjust the damping size of the rotation of the temple 2.

[0051] The implementation principle of the riveting type hinged structure glasses frame of the embodiment 1 of the application is as follows: the frame 1 and the leg 2 are firmly connected together through the riveting connection mode of the riveting part 3 and the first connecting part 11 and the second connecting part 21, so as to replace the traditional screw fixing mode, realize the riveting type hinged connection without screws, effectively avoid the problem of screw loosening or falling off, and simultaneously through the rotation of the cam 115 driven by the screw rod, the movable end 43 of the limiting spring piece 4 is moved, so as to adjust the close degree of the contact between the limiting spring piece 4 and the mounting ring 22, and then adjust the damping size of the rotation of the leg 2, and meet the wearing requirements of different users.

[0052] Embodiment 2

[0053] The embodiment 2 of the application discloses an assembling method of a riveting type hinged structure glasses frame, which is used for assembling the riveting type hinged structure glasses frame as described in any one of the above embodiments, and specifically includes the following steps.

[0054] S1: the first connecting part 11 on the frame 1 is correspondingly inserted into the second connecting part 21 on the leg 2, that is, the positioning ring 111 of the first connecting part 11 is inserted into the mounting ring 22 on the second connecting part 21, and the first mounting hole 112 on the positioning ring 111 is coaxially aligned with the second mounting hole 221 on the mounting ring 22;

[0055] S2: the riveting part 3 is inserted into the coaxial first mounting hole 112 and the second mounting hole 221, so that the riveting part 3 is riveted and fixed with the positioning ring 111, and the mounting ring 22 can rotate relative to the riveting part 3. Specifically, the rotating shaft 33 is inserted 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, the second riveting piece 32 is inserted into the riveting hole 331 of the rotating shaft 33 from the lower side of the rotating shaft 33 to be riveted and fixed, and then the first riveting piece 31 is inserted into the insertion hole 321 of the second riveting piece 32 to be riveted and fixed, so as to realize the hinging between the frame 1 and the leg 2;

[0056] S3: the adjusting screw rod 114 is rotated, so that the adjusting screw rod 114 can drive the cam 115 to rotate, the movable end of the limiting spring piece 4 is moved after the cam 115 is pushed to rotate, that is, the sliding block 44 is moved after the cam 115 is pushed to rotate, the movable end 43 of the limiting spring piece 4 is moved by the sliding block 44, so as to adjust the close degree of the contact between the limiting spring piece 4 and the outer wall of the mounting ring 22, thereby realizing the adjustment of the damping size of the rotation of the leg 2.

[0057] The above are the preferred embodiments of the application, which do not limit the protection scope of the application, so that: any equivalent changes made on the structure, shape and principle of the application should be covered in the protection scope of the application.

Claims

1. A riveted hinge structure glasses frame, comprising: a frame (1), the frame (1) is provided with a first connecting part (11) at both ends; two temple legs (2), one end of the two temple legs (2) is provided with a second connecting part (21), the first connecting part (11) and the second connecting part (21) correspond one by one; the inner side wall of the first connecting part (11) is provided with a positioning ring (111) and a limiting spring sheet (4), a first mounting hole (112) is coaxially provided inside the positioning ring (111), the inner side wall of the second connecting part (21) is provided with two installation rings (22) which are spaced and coaxially arranged, a second mounting hole (221) is coaxially provided inside the installation ring (22), when the frame (1) and the temple leg (2) are assembled, the positioning ring (111) is inserted between the two installation rings (22), and the installation ring (22) is coaxial with the positioning ring (111), the limiting spring sheet (4) is correspondingly arranged on the outer periphery of the installation ring (22) away from the second connecting part (21) and surrounds the installation ring (22), one end of the limiting spring sheet (4) is fixed, the other end is movable and can move towards or away from the second connecting part (21), the inner wall of the limiting spring sheet (4) is in contact with the outer wall of the corresponding installation ring (22), when the movable end of the limiting spring sheet (4) moves, the limiting spring sheet (4) is in close contact or separated from the corresponding installation ring (22); the limiting spring sheet (4) is provided with a limiting protrusion (41) protruding towards the installation ring (22), a plurality of concave limiting grooves (222) are spaced apart on the outer periphery of the installation ring (22), when the installation ring (22) rotates relative to the limiting spring sheet (4), the limiting protrusion (41) slides along the outer periphery of the installation ring (22) and is spaced apart and arranged in each limiting groove (222); the movable end of the limiting spring sheet (4) is provided with a sliding block (44), the sliding block (44) is slidingly connected in the first connecting part (11) and can move towards or away from the second connecting part (21), an adjusting screw (114) is threadedly connected to the position corresponding to the sliding block (44) in the first connecting part (11), one end of the adjusting screw (114) located in the first connecting part (11) is coaxially fixed with a cam (115), the cam (115) is located on the side of the sliding block (44) away from the second connecting part (21), and the cam (115) is in contact with the sliding block (44); a riveting part (3) is inserted into the coaxial first mounting hole (112) and second mounting hole (221), the riveting part (3) is fixed relative to the positioning ring (111), and the installation ring (22) can rotate relative to the riveting part (3).

2. A riveted hinge structure eyeglass frame according to claim 1, wherein: The riveting part (3) comprises a first riveting piece (31), a second riveting piece (32) and a rotating shaft (33), the rotating shaft (33) is inserted into coaxial first mounting holes (112) and second mounting holes (221), the rotating shaft (33) is coaxially provided with a riveting hole (331), the second riveting piece (32) is inserted into the riveting hole (331), the second riveting piece (32) is coaxially provided with a plug-in hole (321) inside, and the first riveting piece (31) is inserted into the plug-in hole (321) at one end.

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

4. The riveted hinge structure eyeglass frame of claim 2, wherein: The first riveting piece is arranged at intervals between the outer walls in the plug-in hole (321) and is provided with a plurality of clamping rings (311).

5. The riveted hinge structure eyeglass frame of claim 1, wherein: The sliding block (44) is provided with an elastic piece (116) away from the cam (115) side, and the two ends of the elastic piece (116) are connected with the inner wall of the sliding block (44) and the first connecting part (11) corresponding to the sliding block (44) respectively.

6. The riveted hinge structure eyeglass frame of claim 1, wherein: The wear-resistant piece (42) is arranged outside the limiting protrusion (41) of the limiting elastic sheet (4).

7. A method of assembling a riveted hinge structure eyeglass frame, characterized by, The riveting type hinged structure glasses frame is assembled, comprising the following steps: S1: the first connecting part (11) on the frame (1) is inserted into the second connecting part (21) on the leg (2) in correspondence, and the first mounting hole (112) on the positioning ring (111) is coaxially aligned with the second mounting hole (221) on the mounting ring (22); S2: the riveting part (3) is inserted into the coaxial first mounting hole (112) and the second mounting hole (221) in correspondence, so that the riveting part (3) is riveted and fixed with the positioning ring (111), and the mounting ring (22) can rotate relative to the riveting part (3); S3: the movable end of the limiting elastic sheet (4) is moved, the close degree of contact between the limiting elastic sheet (4) and the outer wall of the mounting ring (22) is adjusted, and the size of the rotating damping of the leg (2) is adjusted.

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