Rotary circulating gear and seat with same

Abstract

The invention discloses a rotary circulating rail and a seat with the same, and the rotary circulating rail comprises a first bracket, a second bracket, a rotating shaft and a rotating shaft, and one end of the first bracket in the length direction is provided with a rotating hole; the second support comprises a body and a rotating part, the rotating part is rotatably arranged in the rotating hole, a first tooth part, a first limiting structure and a second limiting structure are arranged on the peripheral wall of the rotating part, and the first limiting structure and the second limiting structure are located on the two sides, in the circumferential direction of the rotating part, of the first tooth part correspondingly; the first clamping tooth part is movably arranged on the first support, the first clamping tooth part is provided with a second tooth part, the second tooth part is suitable for being matched with the first tooth part, the first limiting structure is used for driving the second tooth part to be separated from the first tooth part, and the second limiting structure is used for driving the second tooth part to be matched with the first tooth part. According to the rotary circulating gear, multi-gear adjustability and circulating adjustment can be achieved, operability is improved, the adjusting difficulty is reduced, the use requirement of a user is met, and comfort is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of seats, and in particular to a rotary cycle gear and a seat having the same. Background Art

[0002] With the development and progress of technology, people spend more and more time sitting on seats, and the comfort of seats has gradually become the primary consideration for users. As a functional accessory of the seat, the seat armrest is usually fixed on the side of the seat and is used to support the user's arm, which can greatly improve the comfort of the seat. However, the seat armrests in the prior art cannot fully meet the needs of users with different heights and body shapes, nor can they be adjusted according to the different needs of the same user. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. For this purpose, the present invention provides a rotary cycle gear, which can realize multi-gear adjustment of the included angle between the first bracket and the second bracket, and can be adjusted cyclically, improving the operability, reducing the adjustment difficulty, meeting the user's usage requirements, and improving the comfort.

[0004] The present invention also provides a seat, which includes the above-mentioned rotary cycle gear.

[0005] The rotary cycle gear according to an embodiment of the present invention includes: a first bracket, one end of the first bracket in the length direction has a rotation hole; a second bracket, the second bracket includes a body and a rotation part, the rotation part is arranged at one end of the body in the length direction and rotates synchronously with the body, the rotation part is rotatably arranged in the rotation hole, a first tooth part, a first limit structure and a second limit structure are arranged on the outer peripheral wall of the rotation part, the first limit structure and the second limit structure are respectively located on both sides of the first tooth part along the circumferential direction of the rotation part; a first tooth engaging part, the first tooth engaging part is movably arranged on the first bracket, the first tooth engaging part has a second tooth part, the second tooth part is adapted to cooperate with the first tooth part, the first limit structure is used to drive the second tooth part to separate from the first tooth part, and the second limit structure is used to drive the second tooth part to cooperate with the first tooth part.

[0006] According to the rotary cycle gear of the embodiment of the present invention, one end in the length direction of the first bracket has a rotation hole, the second bracket includes a body and a rotation part, the rotation part is rotatably arranged in the rotation hole, a first tooth part, a first limit structure and a second limit structure are arranged on the outer peripheral wall of the rotation part, the first limit structure and the second limit structure are respectively located on both sides of the first tooth part along the circumferential direction of the rotation part, a first engaging tooth part is movably arranged on the first bracket, the first engaging tooth part has a second tooth part, the second tooth part is adapted to cooperate with the first tooth part, the first limit structure is used to drive the second tooth part to separate from the first tooth part, and the second limit structure is used to drive the second tooth part to cooperate with the first tooth part, so that the included angle between the first bracket and the second bracket can be adjusted in multiple gears through a simple structure, and can be adjusted cyclically, improving the operability of the rotary cycle gear, reducing the adjustment difficulty of the rotary cycle gear, meeting different use requirements of users, and improving comfort.

[0007] In addition, the rotary cycle gear according to the present invention may further have the following additional technical features:

[0008] In some embodiments, one direction in the circumferential direction of the rotation part is the first direction, the first limit structure, the first tooth part and the second limit structure are arranged in sequence along the first direction, the first tooth part includes a plurality of first engaging teeth arranged along the circumferential direction of the rotation part, the first engaging tooth has a first wall surface and a second wall surface, the first wall surface is located on one side of the second wall surface in the first direction, in the direction radially outward of the rotation part, the second wall surface is inclined towards the first limit structure or extends along the radial direction of the rotation part, the second tooth part includes a plurality of second engaging teeth arranged along the circumferential direction of the rotation hole, the second engaging tooth has a third wall surface and a fourth wall surface, the third wall surface is located on one side of the fourth wall surface in the first direction, in the direction from the rotation part to the first engaging tooth part, the third wall surface is inclined towards the first limit structure or extends along the arrangement direction of the rotation part and the first engaging tooth part, the third wall surface is adapted to be attached to the second wall surface, and the fourth wall surface is adapted to be attached to the first wall surface.

[0009] In some embodiments, the rotary cycle gear further includes: a spring piece, the spring piece is arranged between the first bracket and the first engaging tooth part, and is used to drive the first engaging tooth part to move towards the first tooth part.

[0010] In some embodiments, a first positioning hole is arranged on the first bracket, along the axial direction of the rotation hole, a first positioning column is arranged on the side of the first engaging tooth part facing the first bracket, and the first positioning column is movably inserted into the first positioning hole.

[0011] In some embodiments, one direction in the circumferential direction of the rotating part is the first direction, and the first limiting structure, the first tooth part and the second limiting structure are arranged in sequence along the first direction. Along the first direction, the first positioning hole is inclined in a direction away from the rotating part.

[0012] In some embodiments, a protruding part is provided on the inner wall of the first positioning hole close to the rotating part. The protruding part is arranged on a part of the inner wall of the first positioning hole in the first direction and is spaced apart from one end of the first positioning hole in the first direction.

[0013] In some embodiments, a plurality of the first positioning holes are arranged at intervals in the circumferential direction of the rotating hole, and a plurality of the first positioning columns correspond to the plurality of the first positioning holes one by one.

[0014] In some embodiments, the rotary cycle gear further includes: a cover plate, which is covered on one side of the body along the axial direction of the rotating hole. The cover plate is arranged opposite to the rotating hole. The cover plate and the first bracket jointly define an installation space, and the first tooth part is located in the installation space.

[0015] In some embodiments, a second positioning hole is provided on the cover plate. Along the axial direction of the rotating hole, a second positioning column is provided on the side of the first tooth part facing the cover plate. The second positioning column is movably inserted into the second positioning hole.

[0016] In some embodiments, the rotating part includes: a mounting block, which is arranged at one end of the body in the length direction and penetrates through the rotating hole. A notch is provided on the side of the mounting block facing the first tooth part. The first limiting structure and the second limiting structure are arranged on the outer peripheral wall of the mounting block, and the first limiting structure and the second limiting structure are respectively located on both sides of the notch along the circumferential direction of the mounting block; a second tooth part, which is arranged at the notch and rotates synchronously with the mounting block. The second tooth part and the mounting block jointly form the rotating part, and the first tooth part is formed on the side of the second tooth part facing the first tooth part.

[0017] In some embodiments, a protrusion is provided on one of the body and the rotating part, and a groove is provided on the other. The protrusion is located in the groove.

[0018] The present invention also provides a seat having the above embodiments.

[0019] The seat according to the embodiment of the present invention is provided with the above-mentioned rotary cycle gear. One end of the first bracket in the length direction has a rotation hole. The second bracket includes a body and a rotation part. The rotation part is rotatably arranged in the rotation hole. A first tooth part, a first limit structure and a second limit structure are arranged on the outer peripheral wall of the rotation part. The first limit structure and the second limit structure are respectively located on both sides of the first tooth part along the circumferential direction of the rotation part. The first tooth part is movably arranged on the first bracket. The first tooth part has a second tooth part. The second tooth part is adapted to cooperate with the first tooth part. The first limit structure is used to drive the second tooth part to separate from the first tooth part. The second limit structure is used to drive the second tooth part to cooperate with the first tooth part. It can realize multi-gear adjustment of the included angle between the first bracket and the second bracket through a simple structure, and can be adjusted cyclically, improving the operability of the rotary cycle gear, reducing the adjustment difficulty of the rotary cycle gear, meeting different use requirements of users, and improving comfort.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0022] Figure 1 is the front view of the rotary cycle gear according to the embodiment of the present invention, where the cover plate is not shown;

[0023] Figure 2 is Figure 1 the enlarged view of part A in

[0024] Figure 3 is the bottom view of the rotary cycle gear according to the embodiment of the present invention, where the cover plate is not shown;

[0025] Figure 4 is the left view of the rotary cycle gear according to the embodiment of the present invention, where the cover plate is not shown;

[0026] Figure 5 is the front view exploded view of the rotary cycle gear according to the embodiment of the present invention;

[0027] Figure 6 is Figure 5 the enlarged view of part B in

[0028] Figure 7 is the bottom view exploded view of the rotary cycle gear according to the embodiment of the present invention;

[0029] Figure 8 is the left view exploded view of the rotary cycle gear according to the embodiment of the present invention.

[0030] Reference numerals:

[0031] 100, Rotating cycle gear;

[0032] 1, First bracket; 10, Rotating hole; 11, Second body; 111, Mounting ring; 112, Mounting groove; 12, Fixing member; 121, Accommodating groove; 13, First positioning hole; 131, Protrusion;

[0033] 2, Second bracket; 21, Body; 211, Projection; 22, Rotating part; 221, Mounting block; 222, Second tooth part; 223, Notch; 23, First tooth part; 231, First tooth; 232, First wall surface; 233, Second wall surface; 24, First limiting structure; 25, Second limiting structure;

[0034] 3, First tooth part; 31, Second tooth part; 311, Second tooth; 312, Third wall surface; 313, Fourth wall surface; 32, First positioning post; 33, Second positioning post;

[0035] 4, Elastic piece;

[0036] 5, Cover plate; 51, Second positioning hole; 511, Second protrusion. Detailed implementation mode

[0037] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0040] In the present invention, unless otherwise clearly specified and defined, terms such as "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] The rotating cycle gear 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0042] As Figure 1 and Figure 4 shown, the rotating cycle gear 100 according to an embodiment of the present invention includes a first bracket 1, a second bracket 2, and a first tooth portion 3.

[0043] Specifically, referring to the attached Figure 1 figures, the first bracket 1 extends along a third direction (as Figure 1 shown), one end of the first bracket 1 in the length direction (referring to the third direction shown in the attached Figure 1 figures) has a rotating hole 10. The second bracket 2 includes a body 21 and a rotating portion 22. The body 21 is located on one side of the first bracket 1 along the axial direction of the rotating hole 10 (referring to the fifth direction shown in the attached Figure 7 figures) and extends along a fourth direction (as Figure 3 shown). The rotating portion 22 is provided at one end of the body 21 in the length direction (referring to the fourth direction shown in the attached Figure 1 figures) and rotates synchronously with the body 21. The rotating portion 22 is rotatably provided in the rotating hole 10. The outer peripheral wall of the rotating portion 22 is provided with a first tooth portion 23, a first limiting structure 24, and a second limiting structure 25. The first limiting structure 24 and the second limiting structure 25 are respectively located on both sides of the first tooth portion 23 in the circumferential direction of the rotating portion 22.

[0044] Furthermore, referring to the attached Figure 2As shown in the figure, the first tooth engaging portion 3 is movably provided on the first bracket 1. The first tooth engaging portion 3 is located radially outside the rotating portion 22 and is disposed opposite to the first tooth portion 23. The first tooth engaging portion 3 has a second tooth portion 31. The second tooth portion 31 is located on the side of the first tooth engaging portion 3 facing the first tooth portion 23. The second tooth portion 31 is adapted to cooperate with the first tooth portion 23. The first limiting structure 24 is used to drive the second tooth portion 31 to separate from the first tooth portion 23, and the second limiting structure 25 is used to drive the second tooth portion 31 to cooperate with the first tooth portion 23.

[0045] It should be noted that one direction in the circumferential direction of the rotating portion 22 is the first direction (such as Figure 2 the counterclockwise direction shown in the figure), the first limiting structure 24, the first tooth portion 23 and the second limiting structure 25 are arranged in sequence along the first direction, and the direction opposite to the first direction is the second direction (such as Figure 2 the clockwise direction shown in the figure).

[0046] It can be understood that when the user normally uses the rotary cycle gear 100, the second tooth portion 31 cooperates with the first tooth portion 23, and the second bracket 2 and the first bracket 1 are relatively stationary; when the user needs to adjust the included angle between the first bracket 1 and the second bracket 2, the second bracket 2 is driven to rotate relative to the first bracket 1 along the first direction, so that the rotating portion 22 can rotate relative to the first tooth engaging portion 3 along the first direction, realizing the cooperation of different gears between the second tooth portion 31 and the first tooth portion 23 to meet the user's usage requirements until the end face of the first limiting structure 24 close to the first tooth portion 23 abuts against the first tooth engaging portion 3, and the first limiting structure 24 can drive the second tooth portion 31 to cancel the cooperation with the first tooth portion 23, so that the first tooth engaging portion 3 is spaced apart from the rotating portion 22, realizing that the second bracket 2 can rotate relative to the first bracket 1 along the second direction; when the user drives the second bracket 2 to rotate relative to the first bracket 1 along the second direction until the end face of the second limiting structure 25 close to the first tooth portion 23 abuts against the first tooth engaging portion 3, the second limiting structure 25 can drive the second tooth portion 31 to cooperate with the first tooth portion 23, realizing the reset of the second bracket 2, and at this time, the rotary locking can be restarted.

[0047] Specifically, referring to the attached Figure 1 figure, the first bracket 1 includes a second body 11 and a fixing member 12. One end of the second body 11 close to the rotating portion is provided with a mounting ring 111. The mounting ring 111 extends along the circumferential direction of the rotating portion 22. The side of the mounting ring 111 facing away from the body 21 has a mounting groove 112. The fixing member 12 is disposed at the mounting groove 112 and jointly defines a rotating hole 10 with the mounting ring 111. The first tooth engaging portion 3 is movably provided on the fixing member 12. By making the second body 11 and the fixing member 12 separate parts, it is convenient to fix the first tooth engaging portion 3 on the first bracket 1, which is convenient for the production, processing and assembly of parts, and can reduce the production and processing difficulty of the rotary cycle gear 100.

[0048] Further, refer to the attached Figure 8 As shown, the fixing part 12 and the mounting ring 111 are connected by fasteners, which can ensure the stability and reliability of the connection between the fixing part 12 and the mounting ring 111, improve the reliability of the rotary cycle gear 100, reduce the difficulty of assembling the fixing part 12 and the mounting ring 111, improve the assembly efficiency of the fixing part 12 and the mounting ring 111, and facilitate the maintenance and replacement of the fixing part 12.

[0049] Preferably, the body 21 is made of nylon. Nylon has high strength and good elasticity, resilience, heat resistance, corrosion resistance, electrical insulation, fatigue resistance, and self-lubrication. It is easy to process, which can reduce the production and processing costs of the second bracket 2 and facilitate the lightweight design of the rotary cycle gear 100. Furthermore, due to the high strength of the nylon, the body 21 can withstand greater stress and pressure, avoiding deformation caused by the user leaning on or squeezing, thereby improving the reliability and stability of the second bracket 2.

[0050] Preferably, the first bracket 1 is made of an aluminum alloy. Aluminum alloy has good strength, allowing the first bracket 1 to withstand greater stress and pressure, preventing deformation caused by the user leaning on or squeezing, and improving the reliability and stability of the first bracket 1. Furthermore, the first latching tooth portion 3 is made of a zinc alloy powder metallurgy component. Due to the presence of the second tooth portion 31, the first latching tooth portion 3 requires a more precise production and processing process. Using a zinc alloy powder metallurgy component for the first latching tooth portion 3 can minimize the production and processing costs of the first latching tooth portion 3 while ensuring its strength, shortening the production cycle of the first latching tooth portion 3.

[0051] It should be noted that the rotary cycle gear 100 of the present invention can be used in various situations where rotation is required and locking at certain specific angles is required. For example, the rotary cycle gear 100 can be used on a seat, wherein the first bracket 1 is fixed to the seat back, and the second bracket 2 is rotatably connected to the first bracket 1 as an armrest. The user can freely adjust the angle of the armrest to meet the needs of users of different heights and body shapes as well as different usage needs of the same user, thereby improving the comfort of the seat and improving the user experience.

[0052] According to the rotary cycle gear 100 of the embodiment of the present invention, one end of the first bracket 1 in the length direction has a rotation hole 10. The second bracket 2 includes a body 21 and a rotation part 22. The rotation part 22 is rotatably arranged in the rotation hole 10. A first tooth part 23, a first limit structure 24 and a second limit structure 25 are arranged on the outer peripheral wall of the rotation part 22. The first limit structure 24 and the second limit structure 25 are respectively located on both sides of the first tooth part 23 along the circumferential direction of the rotation part 22. The first tooth engaging part 3 is movably arranged on the first bracket 1. The first tooth engaging part 3 has a second tooth part 31. The second tooth part 31 is adapted to cooperate with the first tooth part 23. The first limit structure 24 is used to drive the second tooth part 31 to separate from the first tooth part 23. The second limit structure 25 is used to drive the second tooth part 31 to cooperate with the first tooth part 23. It can realize multi-gear adjustment of the included angle between the first bracket 1 and the second bracket 2 through a simple structure, and can be adjusted cyclically, improve the operability of the rotary cycle gear 100, reduce the adjustment difficulty of the rotary cycle gear 100, meet different use requirements of users, and improve comfort.

[0053] In some embodiments of the present invention, referring to the attached Figure 2 As shown, one direction in the circumferential direction of the rotation part 22 is the first direction. The first limit structure 24, the first tooth part 23 and the second limit structure 25 are arranged in sequence along the first direction. The first tooth part 23 includes a plurality of first teeth 231 arranged along the circumferential direction of the rotation part 22. The first teeth 231 have a first wall surface 232 and a second wall surface 233. The first wall surface 232 is located on one side of the second wall surface 233 in the first direction. In the direction radially outward of the rotation part 22, the first wall surface 232 is inclined towards the first limit structure 24. The second wall surface 233 is inclined towards the first limit structure 24 or extends along the radial direction of the rotation part 22. The second tooth part 31 includes a plurality of second teeth 311 arranged along the circumferential direction of the rotation hole 10. The second teeth 311 have a third wall surface 312 and a fourth wall surface 313. The third wall surface 312 is located on one side of the fourth wall surface 313 in the first direction. In the direction from the rotation part 22 to the first tooth engaging part 3, the third wall surface 312 is inclined towards the first limit structure 24 or extends along the arrangement direction of the rotation part 22 and the first tooth engaging part 3. The fourth wall surface 313 is inclined towards the first limit structure 24. The third wall surface 312 is adapted to be attached to the second wall surface 233. The fourth wall surface 313 is adapted to be attached to the first wall surface 232.

[0054] It can be understood that the cooperation between the first wall surface 232 and the fourth wall surface 313 can enable the first engaging tooth 231 to move relative to the second engaging tooth 311 in the first direction. The fourth wall surface 313 can play a guiding role in the movement of the first engaging tooth 231, facilitating the user to drive the second bracket 2 to rotate in the first direction, facilitating the user to switch the gears of the rotary cycle gear 100, realizing the adjustment of the relative positions of the first tooth portion 23 and the second tooth portion 31, meeting the user's requirements for different positions of the first bracket 1 and the second bracket 2 in the first direction, improving the user experience, and enhancing user satisfaction. The third wall surface 312 can be used to restrict the movement of the first engaging tooth 231 in the second direction, and the cooperation between the second wall surface 233 and the third wall surface 312 can achieve the relative rest between the first engaging tooth 231 and the second engaging tooth 311, improving the reliability of the cooperation between the first engaging tooth 231 and the second engaging tooth 311, realizing the locking of the first bracket 1 and the second bracket 2 at the angle required by the user, avoiding the loosening of the cooperation between the first engaging tooth 231 and the second engaging tooth 311 due to the force in the second direction on the rotary cycle gear 100, ensuring the safety of the rotary cycle gear 100, and ensuring the user experience.

[0055] It should be noted that when the second wall surface 233 extends in the radial direction of the rotating part 22, the third wall surface 312 extends in the arrangement direction of the rotating part 22 and the first engaging tooth part 3; when the second wall surface 233 inclines towards the first limiting structure 24, the third wall surface 312 also inclines towards the first limiting structure 24, which can improve the reliability of the cooperation between the first engaging tooth 231 and the second engaging tooth 311, further avoiding the loosening of the cooperation between the first engaging tooth 231 and the second engaging tooth 311 due to the force in the second direction on the rotary cycle gear 100, ensuring the safety of the rotary cycle gear 100, and ensuring the user experience.

[0056] In some embodiments of the present invention, referring to the attached Figure 2 As shown, the rotary cycle gear 100 further includes a spring piece 4. The spring piece 4 is arranged between the first bracket 1 and the first engaging tooth part 3 and is used to drive the first engaging tooth part 3 to move towards the first tooth portion 23. The spring piece 4 can continuously provide a driving force for the first engaging tooth part 3 to ensure the cooperation between the second tooth portion 31 and the first tooth portion 23, avoid the loosening of the cooperation between the first tooth portion 23 and the second tooth portion 31, ensure the safety of the rotary cycle gear 100, and guarantee the user experience. Moreover, when the second tooth portion 31 is disengaged from the first tooth portion 23, the spring piece 4 can provide an elastic force to quickly drive the first engaging tooth part 3 to rotate towards the direction close to the first tooth portion 23, so that the second tooth portion 31 can be quickly engaged with the first tooth portion 23.

[0057] Specifically, referring to the attached Figure 2As shown, the first bracket 1 is provided with a receiving groove 121 on one side along the axial direction of the rotating hole 10, and the side of the receiving groove 121 facing the rotating hole 10 is open, and the first tooth portion 3 is provided in the receiving groove 121, and one end of the spring piece 4 in the extension direction is fixed on the inner wall of the receiving groove 121, and the other end is abutted against the side wall of the first tooth portion 3 facing away from the first tooth portion 23, so as to drive the first tooth portion 3 to move toward the first tooth portion 23.

[0058] Preferably, the spring piece 4 is made of spring steel, which has excellent elasticity and deformation resistance, ensuring that the spring piece 4 can quickly return to its original shape after being subjected to pressure or deformation, so that when the second tooth 311 is disengaged from the first tooth 231, the spring piece 4 can quickly provide elastic force to drive the first tooth part 3 to rotate, so that the second tooth 311 is engaged with the first tooth 231.

[0059] In some embodiments of the present invention, Figure 2 and attached Figure 6 As shown, combined with the reference Figure 1 and attached Figure 5 The first bracket 1 is provided with a first positioning hole 13, and a first positioning column 32 is provided on the side of the first tooth portion 3 facing the first bracket 1 along the axial direction of the rotating hole 10, and the first positioning column 32 can be movably passed through the first positioning hole 13. It can be understood that by providing the first positioning hole 13, on the one hand, it can play a positioning role in the assembly of the first positioning column 32, reduce the assembly difficulty of the first tooth portion 3, and improve the assembly efficiency of the rotary cycle gear 100; on the other hand, when the first tooth portion 3 moves, the first positioning hole 13 can limit the first positioning column 32 to achieve a guiding effect on the first tooth portion 3, thereby ensuring the normal cooperation between the first tooth portion 23 and the second tooth portion 31.

[0060] It should be noted that, refer to the attached Figure 6As shown, the dimension of the first positioning hole 13 in the circumferential direction of the rotation hole 10 is larger than that in the radial direction of the rotation hole 10, and the dimension of the first positioning hole 13 in the radial direction of the rotation hole 10 is slightly larger than the diameter of the first positioning post 32. It can be understood that during the process of the user driving the second bracket 2 to rotate, the first engaging tooth portion 3 needs to move relative to the rotating portion in the radial direction of the rotating portion to achieve the engagement, disengagement and re-engagement of the second engaging tooth 311 and the first engaging tooth 231. Making the dimension of the first positioning hole 13 in the radial direction of the rotation hole 10 slightly larger than the diameter of the first positioning post 32 can meet the requirement that the first positioning post 32 slightly shakes in the radial direction of the rotation hole 10 within the first positioning hole 13, ensuring the engagement and disengagement between the first engaging tooth 231 and the second engaging tooth 311; and making the dimension of the first positioning hole 13 in the circumferential direction of the rotation hole 10 larger than that in the radial direction of the rotation hole 10 can meet the requirement that the first positioning post 32 moves in the circumferential direction of the rotation hole 10, realizing that the first engaging tooth portion 3 can be driven by the first limiting structure 24 to separate from the first tooth portion 23 and can be driven by the second limiting structure 25 to engage with the first tooth portion 23.

[0061] In a further embodiment of the present invention, referring to the attached Figure 6 As shown, one direction in the circumferential direction of the rotating portion 22 is the first direction. The first limiting structure 24, the first tooth portion 23 and the second limiting structure 25 are arranged in sequence along the first direction. Along the first direction, the first positioning hole 13 inclines towards the direction away from the rotating portion 22, so as to meet the reset requirement of the second bracket 2 and realize multi-gear cyclic adjustment.

[0062] It can be understood that when the user needs to adjust the angle between the first bracket 1 and the second bracket 2, the second bracket 2 is driven to rotate relative to the first bracket 1 in the first direction, so that the rotating part 22 can rotate relative to the first tooth part 3 in the first direction, realizing the cooperation of different gears between the second tooth part 31 and the first tooth part 23 to meet the user's usage requirements. At this time, the first positioning post 32 is always located at one end of the first positioning hole 13 in the second direction until the end face of the first limiting structure 24 close to the first tooth part 23 abuts against the first tooth part 3. The first limiting structure 24 can drive the second tooth part 31 and the first tooth part 23 to cancel the cooperation, so that the first tooth part 3 and the rotating part 22 are spaced apart, realizing that the second bracket 2 can rotate relative to the first bracket 1 in the second direction. At this time, the first positioning post 32 gradually moves from one end of the first positioning hole 13 in the second direction to one end in the first direction; when the user drives the second bracket 2 to rotate relative to the first bracket 1 in the second direction until the end face of the second limiting structure 25 close to the first tooth part 23 abuts against the first tooth part 3, the second limiting structure 25 can drive the second tooth part 31 and the first tooth part 23 to cooperate to realize the reset of the second bracket 2. At this time, the first positioning post 32 gradually moves back from one end of the first positioning hole 13 in the first direction to one end in the second direction, and the rotation locking can be restarted.

[0063] In a further embodiment of the present invention, referring to the attached Figure 6 As shown, a protruding part 131 is provided on the inner wall of the first positioning hole 13 close to the rotating part 22. The protruding part 131 is provided on a part of the inner wall of the first positioning hole 13 in the first direction and is spaced apart from one end of the first positioning hole 13 in the first direction. Along the extending direction of the first positioning hole 13 (referring to the sixth direction shown in the attached Figure 6 figure), the distance between the protruding part 131 and one end of the first positioning hole 13 in the first direction is slightly larger than the diameter of the first positioning post 32. After the first positioning post 32 moves from one end of the first positioning hole 13 in the second direction to one end in the first direction, the first tooth part 3 can be driven to move towards the rotating part by the elastic piece 4, so that the first positioning post 32 abuts against the inner wall of the first positioning hole 13 close to the rotating part 22. At this time, the first positioning post 32 is located on one side of the protruding part 131 in the first direction, and the protruding part 131 can play a role in limiting the first positioning post 32 to prevent the first positioning post 32 from moving towards the second direction without external force, so that the second tooth part 31 can always be separated from the first tooth part 23 until the second limiting structure 25 drives the first tooth part 3 to move towards the second direction, and the first positioning post 32 overcomes the obstruction of the protruding part 131 and moves towards the second direction under the action of the second limiting structure 25, so as to ensure that the user can normally drive the second bracket 2 to move in the second direction until it is reset.

[0064] Providing the protrusion 131 on the inner wall of the first positioning hole 13 close to the rotating portion 22 can reduce the difficulty of the first positioning column 32 moving from one end of the first positioning hole 13 in the second direction to one end of the first direction, avoid the presence of the protrusion 131 hindering the movement of the first positioning column 32 along the first direction, and reduce the difficulty of the user driving the second bracket 2 to move along the first direction.

[0065] In a further embodiment of the present invention, referring to the attached Figure 6 As shown, the first positioning holes 13 are multiple and spaced apart along the circumferential direction of the rotating hole 10, and the first positioning posts 32 are multiple and correspond one to one with the multiple first positioning holes 13. By cooperating with the multiple first positioning posts 32 and the first positioning holes 13, the positioning and guiding effects of the first positioning holes 13 on the first positioning posts 32 can be improved, thereby further reducing the assembly difficulty of the first latching tooth portion 3, improving the assembly efficiency of the rotary cycle gear 100, avoiding unnecessary shaking of the first latching tooth portion 3, and ensuring the normal cooperation between the first tooth portion 23 and the second tooth portion 31. For example, the first positioning holes 13 can be two, three or four and spaced apart along the circumferential direction of the rotating hole 10, and the first positioning posts 32 can be two, three or four and correspond one to one with the multiple first positioning holes 13. In a specific example, refer to the attached Figure 6 As shown, there are two first positioning holes 13 spaced apart along the circumferential direction of the rotating hole 10 , and there are two first positioning columns 32 corresponding to the two first positioning holes 13 on a one-to-one basis.

[0066] In some embodiments of the present invention, Figure 5 , Attachment Figure 7 and attached Figure 8 As shown, the rotary circulation gear 100 also includes a cover plate 5, which is arranged on one side of the main body 21 along the axial direction of the rotating hole 10. The cover plate 5 is arranged opposite to the rotating hole 10. The cover plate 5 and the first bracket 1 jointly define an installation space. The first tooth portion 3 is located in the installation space. The setting of the cover plate 5 can cover the first tooth portion 3, the rotating portion and other components in the installation space, thereby improving the aesthetics of the rotary circulation gear 100 and having a dust-proof effect, avoiding dust, debris, etc. from entering the gap in the installation space and affecting the normal rotation of the second bracket 2, thereby relatively extending the service life of the rotary circulation gear 100.

[0067] Preferably, the cover plate 5 is made of aluminum alloy. Aluminum alloy has good strength, which can enable the cover plate 5 to withstand greater stress and pressure, avoid deformation due to user's leaning or squeezing, and improve the reliability and stability of the cover plate 5.

[0068] It should be noted that the cover plate 5 and the body 21 are connected by fasteners, which can ensure the stability and reliability of the connection between the cover plate 5 and the body 21, improve the reliability of the rotary cycle gear 100, reduce the assembly difficulty between the cover plate 5 and the body 21, improve the assembly efficiency of the cover plate 5 and the body 21, and facilitate the maintenance of the rotary cycle gear 100.

[0069] In a further embodiment of the present invention, referring to the attached Figure 6 As shown, the cover plate 5 is provided with a second positioning hole 51. Along the axial direction of the rotation hole 10, a second positioning post 33 is provided on the side of the first tooth engaging portion 3 facing the cover plate 5. The second positioning post 33 is movably inserted into the second positioning hole 51. It can be understood that by providing the second positioning hole 51, on the one hand, it can play a positioning role in the assembly of the second positioning post 33, reduce the assembly difficulty of the first tooth engaging portion 3, and improve the assembly efficiency of the rotary cycle gear 100; on the other hand, when the first tooth engaging portion 3 moves, the guiding effect on the first tooth engaging portion 3 can be realized by the limitation of the second positioning post 33 by the second positioning hole 51, ensuring the normal cooperation between the first tooth portion 23 and the second tooth portion 31.

[0070] It should be noted that, referring to the attached Figure 6 As shown, the dimension of the second positioning hole 51 in the circumferential direction of the rotation hole 10 is larger than the dimension in the radial direction of the rotation hole 10, and the dimension of the second positioning hole 51 in the radial direction of the rotation hole 10 is slightly larger than the diameter of the second positioning post 33. It can be understood that during the process of the user driving the second bracket 2 to rotate, the first tooth engaging portion 3 needs to move relative to the rotating portion in the radial direction of the rotating portion to realize the cooperation, disengagement and re - cooperation between the second teeth 311 and the first teeth 231. Making the dimension of the second positioning hole 51 in the radial direction of the rotation hole 10 slightly larger than the diameter of the second positioning post 33 can meet the requirement of the slight shaking of the second positioning post 33 in the second positioning hole 51 in the radial direction of the rotation hole 10, ensuring the cooperation and disengagement between the first teeth 231 and the second teeth 311; making the dimension of the second positioning hole 51 in the circumferential direction of the rotation hole 10 larger than the dimension in the radial direction of the rotation hole 10 can meet the requirement of the movement of the second positioning post 33 in the circumferential direction of the rotation hole 10, realizing that the first tooth engaging portion 3 can be driven by the first limiting structure 24 to separate from the first tooth portion 23 and can be driven by the second limiting structure 25 to cooperate with the first tooth portion 23.

[0071] Furthermore, referring to the attached Figure 6As shown, along the first direction, the second positioning hole 51 is inclined in a direction away from the rotating part 22, so as to meet the reset requirement of the second bracket 2 and achieve multi-gear cyclic adjustment. It can be understood that when the user needs to adjust the included angle between the first bracket 1 and the second bracket 2, the second bracket 2 is driven to rotate relative to the first bracket 1 along the first direction, so that the rotating part 22 can rotate relative to the first tooth part 3 along the first direction, realizing the cooperation of different gears between the second tooth part 31 and the first tooth part 23 to meet the user's usage requirements. At this time, the second positioning column 33 is always located at one end of the second positioning hole 51 in the second direction until the end face of the first limiting structure 24 close to the first tooth part 23 abuts against the first tooth part 3. The first limiting structure 24 can drive the second tooth part 31 and the first tooth part 23 to cancel the cooperation, so that the first tooth part 3 and the rotating part 22 are spaced apart, realizing that the second bracket 2 can rotate relative to the first bracket 1 along the second direction. At this time, the second positioning column 33 gradually moves from one end of the second positioning hole 51 in the second direction to one end in the first direction; when the user drives the second bracket 2 to rotate relative to the first bracket 1 along the second direction until the end face of the second limiting structure 25 close to the first tooth part 23 abuts against the first tooth part 3, the second limiting structure 25 can drive the second tooth part 31 and the first tooth part 23 to cooperate to realize the reset of the second bracket 2. At this time, the second positioning column 33 gradually moves back from one end of the second positioning hole 51 in the first direction to one end in the second direction, and the rotation locking can be restarted.

[0072] Furthermore, referring to the attached Figure 6 As shown, on the inner wall of the second positioning hole 51 close to the rotating part 22, there is a second protruding part 511. The second protruding part 511 is arranged on a part of the inner wall of the second positioning hole 51 in the first direction and is spaced apart from one end of the second positioning hole 51 in the first direction. Along the extending direction of the second positioning hole 51 (referring to the sixth direction shown in the attached Figure 6 figure), the distance between the second protruding part 511 and one end of the second positioning hole 51 in the first direction is slightly larger than the diameter of the second positioning column 33. After the second positioning column 33 moves from one end of the second positioning hole 51 in the second direction to one end in the first direction, the first tooth part 3 can be driven to move towards the rotating part by the elastic piece 4, so that the second positioning column 33 abuts against the inner wall of the second positioning hole 51 close to the rotating part 22. At this time, the second positioning column 33 is located on the first direction side of the second protruding part 511, and the second protruding part 511 can play a limiting role on the second positioning column 33 to prevent the second positioning column 33 from moving towards the second direction without external force, so that the second tooth part 31 can always be separated from the first tooth part 23 until the second limiting structure 25 drives the first tooth part 3 to move towards the second direction, and the second positioning column 33 overcomes the obstruction of the protruding part 131 and moves towards the second direction under the action of the second limiting structure 25, so as to ensure that the user can normally drive the second bracket 2 to move along the second direction until it is reset.

[0073] The second protruding portion 511 is provided on the inner wall of the second positioning hole 51 close to the rotating portion 22, which can reduce the difficulty for the second positioning post 33 to move from one end in the second direction of the second positioning hole 51 to one end in the first direction, avoid the existence of the second protruding portion 511 from hindering the movement of the second positioning post 33 in the first direction, and reduce the difficulty for the user to drive the second bracket 2 to move in the first direction.

[0074] Furthermore, referring to the appendix Figure 6 As shown, a plurality of second positioning holes 51 are arranged at intervals in the circumferential direction of the rotating hole 10, and a plurality of second positioning posts 33 are provided corresponding to the plurality of second positioning holes 51 one by one. Through the cooperation of the second positioning posts 33 and the second positioning holes 51 at multiple positions, the positioning and guiding effects of the second positioning holes 51 on the second positioning posts 33 can be improved, the assembly difficulty of the first camming portion 3 can be further reduced, the assembly efficiency of the rotary cycle gear 100 can be improved, unnecessary shaking of the first camming portion 3 can be avoided, and the normal cooperation between the first tooth portion 23 and the second tooth portion 31 can be ensured. For example, the second positioning holes 51 can be two, three or four arranged at intervals in the circumferential direction of the rotating hole 10, and the second positioning posts 33 are two, three or four corresponding to the plurality of second positioning holes 51 one by one. In a specific example, referring to the appendix Figure 6 As shown, two second positioning holes 51 are arranged at intervals in the circumferential direction of the rotating hole 10, and two second positioning posts 33 are provided corresponding to the two second positioning holes 51 one by one.

[0075] In some embodiments of the present invention, referring to the appendix Figure 2 As shown, the rotating portion 22 includes a mounting block 221 and a second camming portion 222. The mounting block 221 is provided in the length direction of the body 21 (referring to the appendix Figure 1The fourth direction shown in the figure) is one end and is penetrated into the rotating hole 10, and a notch 223 is provided on the side of the mounting block 221 facing the first tooth portion 3, and the first limiting structure 24 and the second limiting structure 25 are provided on the outer peripheral wall of the mounting block 221, and the first limiting structure 24 and the second limiting structure 25 are respectively located on both sides of the notch 223 along the circumferential direction of the mounting block 221, and the second tooth portion 222 is provided at the notch 223 and rotates synchronously with the mounting block 221, and the second tooth portion 222 and the mounting block 221 are jointly constructed to form the rotating portion 22, and the first tooth portion 23 is formed on the side of the second tooth portion 222 facing the first tooth portion 3. By making the mounting block 221 and the second tooth portion 222 as separate parts, the production, processing and assembly of parts can be facilitated, and the production and processing difficulty of the rotary cycle gear 100 can be reduced. Moreover, since the second tooth portion 222 is provided with the first tooth portion 23, a more precise production and processing technology is required, while the mounting block 221 does not require high-precision processing technology, the mounting block 221 and the second tooth portion 222 are produced and processed separately, which can also relatively reduce the production cost of the mounting block 221, thereby reducing the production and processing cost of the rotating part.

[0076] Preferably, the second tooth portion 222 is a zinc alloy powder metallurgy part. Due to the presence of the first tooth portion 23, the second tooth portion 222 requires a more precise production and processing technology. Making the second tooth portion 222 a zinc alloy powder metallurgy part can reduce the production and processing cost of the second tooth portion 222 as much as possible while ensuring the strength of the second tooth portion 222, thereby shortening the production cycle of the second tooth portion 222.

[0077] In a further embodiment of the present invention, referring to the attached Figure 7 As shown, a protrusion 211 is provided on one of the main body 21 and the rotating part 22, and a groove is provided on the other. The protrusion 211 is located in the groove. Through the cooperation between the protrusion 211 and the groove, on the one hand, it can play a positioning role when the anti-rotation part and the main body 21 are assembled, reducing the difficulty of assembling the second bracket 2. On the other hand, it can ensure that the rotating part 22 and the main body 21 rotate synchronously, thereby ensuring the reliability of the rotation cycle gear 100.

[0078] It can be understood that the side of the main body 21 facing the rotating part 22 may be provided with a protrusion 211, and the side of the rotating part 22 facing the main body 21 may be provided with a groove; or the side of the main body 21 facing the rotating part 22 may be provided with a groove, and the side of the rotating part 22 facing the main body 21 may be provided with a protrusion 211.

[0079] The present invention also provides a seat having the rotary cycle gear 100 of the above embodiment.

[0080] The seat according to the embodiment of the present invention is provided with the above-mentioned rotary cycle gear 100. One end of the first bracket 1 in the length direction has a rotation hole 10. The second bracket 2 includes a main body 21 and a rotation part 22. The rotation part 22 is rotatably arranged in the rotation hole 10. The outer peripheral wall of the rotation part 22 is provided with a first tooth part 23, a first limit structure 24 and a second limit structure 25. The first limit structure 24 and the second limit structure 25 are respectively located on both sides of the first tooth part 23 along the circumferential direction of the rotation part 22. The first engaging tooth part 3 is movably arranged on the first bracket 1. The first engaging tooth part 3 has a second tooth part 31. The second tooth part 31 is adapted to cooperate with the first tooth part 23. The first limit structure 24 is used to drive the second tooth part 31 to separate from the first tooth part 23. The second limit structure 25 is used to drive the second tooth part 31 to cooperate with the first tooth part 23. It can realize multi-gear adjustment of the included angle between the first bracket 1 and the second bracket 2 through a simple structure, and can be adjusted cyclically, improving the operability of the rotary cycle gear 100, reducing the adjustment difficulty of the rotary cycle gear 100, meeting different use requirements of users, and improving comfort.

[0081] The other components and operations of the rotary cycle gear 100 and the seat according to the embodiment of the present invention are known to those of ordinary skill in the art and will not be described in detail here.

[0082] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0083] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A rotary cycle gearshift, characterized in that, Comprising: A first bracket (1), one end of the first bracket (1) in the length direction having a rotation hole (10); A second bracket (2), the second bracket (2) including a body (21) and a rotation part (22), the rotation part (22) being provided at one end of the body (21) in the length direction and rotating synchronously with the body (21), the rotation part (22) being rotatably provided in the rotation hole (10), a first tooth part (23), a first limit structure (24) and a second limit structure (25) being provided on the outer peripheral wall of the rotation part (22), the first limit structure (24) and the second limit structure (25) being respectively located on both sides of the first tooth part (23) along the circumferential direction of the rotation part (22); A first tooth engaging part (3), the first tooth engaging part (3) being movably provided on the first bracket (1), the first tooth engaging part (3) having a second tooth part (31), the second tooth part (31) being adapted to cooperate with the first tooth part (23), the first limit structure (24) being used to drive the second tooth part (31) to separate from the first tooth part (23), and the second limit structure (25) being used to drive the second tooth part (31) to cooperate with the first tooth part (23).

2. The rotary cycle gear according to claim 1, wherein One direction in the circumferential direction of the rotation part (22) is a first direction, the first limit structure (24), the first tooth part (23) and the second limit structure (25) being arranged in sequence along the first direction, the first tooth part (23) including a plurality of first teeth (231) arranged along the circumferential direction of the rotation part (22), the first teeth (231) having a first wall surface (232) and a second wall surface (233), the first wall surface (232) being located on one side of the second wall surface (233) in the first direction, in the radially outward direction of the rotation part (22), the second wall surface (233) being inclined towards the first limit structure (24) or extending along the radial direction of the rotation part (22), The second tooth part (31) includes a plurality of second teeth (311) arranged along the circumferential direction of the rotation hole (10), the second teeth (311) having a third wall surface (312) and a fourth wall surface (313), the third wall surface (312) being located on one side of the fourth wall surface (313) in the first direction, in the direction from the rotation part (22) to the first tooth engaging part (3), the third wall surface (312) being inclined towards the first limit structure (24) or extending along the arrangement direction of the rotation part (22) and the first tooth engaging part (3), the third wall surface (312) being adapted to be in contact with the second wall surface (233), and the fourth wall surface (313) being adapted to be in contact with the first wall surface (232).

3. The rotary cycle gear according to claim 1, wherein Further comprising: A spring piece (4), the spring piece (4) being provided between the first bracket (1) and the first tooth engaging part (3) for driving the first tooth engaging part (3) to move towards the first tooth part (23).

4. The rotary cycle gear according to claim 1, wherein The first bracket (1) is provided with a first positioning hole (13). Along the axial direction of the rotation hole (10), on the side of the first tooth engaging portion (3) facing the first bracket (1), a first positioning post (32) is provided, and the first positioning post (32) movably passes through the first positioning hole (13).

5. The rotary cycle gear according to claim 4, wherein One direction in the circumferential direction of the rotating portion (22) is the first direction. The first limiting structure (24), the first tooth portion (23), and the second limiting structure (25) are arranged in sequence along the first direction. Along the first direction, the first positioning hole (13) is inclined in a direction away from the rotating portion (22).

6. The rotary cycle gear according to claim 5, characterized in that On the inner wall of the first positioning hole (13) close to the rotating portion (22), there is a protruding portion (131). The protruding portion (131) is provided on a part of the inner wall of the first positioning hole (13) in the first direction and is spaced apart from one end of the first positioning hole (13) in the first direction.

7. The rotary cycle gear according to claim 4, characterized in that, The first positioning holes (13) are provided in plurality at intervals in the circumferential direction of the rotation hole (10), and the first positioning posts (32) are in plurality corresponding to the plurality of first positioning holes (13) one by one.

8. The rotary cycle gear according to claim 1, wherein The rotary cycle gear (100) further includes: A cover plate (5), the cover plate (5) is covered on one side of the body (21) along the axial direction of the rotation hole (10). The cover plate (5) is arranged opposite to the rotation hole (10). The cover plate (5) and the first bracket (1) jointly define an installation space, and the first tooth engaging portion (3) is located in the installation space.

9. The rotary cycle gear according to claim 8, characterized in that, The cover plate (5) is provided with a second positioning hole (51). Along the axial direction of the rotation hole (10), on the side of the first tooth engaging portion (3) facing the cover plate (5), a second positioning post (33) is provided, and the second positioning post (33) movably passes through the second positioning hole (51).

10. The rotary cycle gear according to claim 1, characterized in that, The rotating portion (22) includes: An installation block (221), the installation block (221) is arranged at one end of the body (21) in the length direction and passes through the rotation hole (10). On the side of the installation block (221) facing the first tooth engaging portion (3), there is a notch (223). The first limiting structure (24) and the second limiting structure (25) are arranged on the outer peripheral wall of the installation block (221), and the first limiting structure (24) and the second limiting structure (25) are respectively located on both sides of the notch (223) in the circumferential direction of the installation block (221). A second tooth engaging portion (222), the second tooth engaging portion (222) is arranged at the notch (223) and rotates synchronously with the installation block (221). The second tooth engaging portion (222) and the installation block (221) jointly form the rotating portion (22), and the first tooth portion (23) is formed on the side of the second tooth engaging portion (222) facing the first tooth engaging portion (3).

11. The rotary cycle gear according to claim 10, wherein One of the body (21) and the rotating part (22) is provided with a protrusion (211), and the other is provided with a groove, and the protrusion (211) is located in the groove.

12. A seat, characterized in that, Comprising a rotary cycle gear (100) according to any one of claims 1-11.

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