Car seats
A single driving member with a transmission mechanism simplifies the automobile seat structure and reduces production costs by enabling dual-direction adjustment of the seat cushion and backrest angles without multiple control handles.
Patent Information
- Application Number
- CN202110971376.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-08-24
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2041-08-24
AI Technical Summary
Existing automobile seats require two independent control handle mechanisms for adjusting the inclination angle of the seat cushion assembly and the angle of the backrest assembly, leading to a complex structure, high production cost, and cumbersome assembly process.
A single driving member that can rotate in two directions to unlock both the seat cushion assembly and the backrest bracket, utilizing a transmission mechanism with rotating frames and tensioning structures to simplify the control mechanism and reduce the need for multiple handles.
Simplifies the car seat structure, enhances production and assembly efficiency, and lowers production costs by integrating the control mechanism into a single handle system.
Smart Images
Figure CN113733993B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of automobile parts, and in particular to an automobile seat. Background Art
[0002] At present, the automobile seats in trucks and buses on the market all have the function of adjusting the inclination angle of the seat cushion assembly and the function of adjusting the angle of the backrest assembly. When the driver and passenger need to adjust the inclination angle of the seat cushion assembly, they need to operate one of the control handle mechanisms on the automobile seat to drive the inclination angle adjustment mechanism so that the inclination angle adjustment mechanism releases the locking state of the seat cushion assembly. After the seat cushion assembly is unlocked, the inclination angle of the seat cushion assembly can be adjusted. After the inclination angle of the seat cushion assembly is adjusted, the control handle mechanism is released so that the inclination angle adjustment mechanism can lock the seat cushion assembly again. Similarly, when the driver and passenger need to adjust the angle of the backrest assembly, they need to operate another control handle on the automobile seat. The mechanism drives the angle adjustment mechanism to release the locking state of the backrest assembly. After the backrest assembly is unlocked, the angle of the backrest assembly can be adjusted. After the angle adjustment of the backrest assembly is completed, the control handle mechanism is released to allow the angle adjustment mechanism to lock the backrest assembly again. Since in the process of adjusting the inclination angle of the seat cushion assembly and the angle of the backrest assembly, two sets of independent control handle mechanisms are needed to respectively unlock the seat cushion assembly and the backrest assembly, this not only has the disadvantages of complex structure of the automobile seat and troublesome production and assembly, but also has the disadvantage of high production cost of the automobile seat due to the need to adopt two independent control handle mechanisms. Summary of the invention
[0003] In view of the deficiencies in the prior art, the present invention provides a car seat, wherein a driving member inside the car seat can respectively unlock a seat cushion assembly and a backrest bracket by rotating in two directions. In this way, only a control handle mechanism consisting of a driving member is required on the car seat. This not only simplifies the structure of the car seat and improves the production and assembly efficiency of the car seat, but also reduces the production cost of the car seat.
[0004] The automobile seat of the present invention comprises a seat frame, a cushion assembly, a backrest bracket and a cable, the cushion assembly is connected to the front side of the upper end of the seat frame through a reclining mechanism, the backrest bracket is connected to the rear side of the upper end of the seat frame through an angle adjustment mechanism, one end of an outer sleeve in the cable is connected to a shell in the reclining mechanism, one end of a traction line in the cable is connected to a control end in the reclining mechanism, a transmission mechanism is installed on the seat frame, a driving member for driving the transmission mechanism is rotatably connected to the seat frame, the control end in the angle adjustment mechanism is transmission-connected to a first output end of the transmission mechanism, the other end of the outer sleeve in the cable is connected to the seat frame, the other end of the traction line in the cable is connected to a second output end of the transmission mechanism, when the driving member rotates toward one side, the second output end of the transmission mechanism is used to pull the traction line so that the reclining mechanism releases the lock on the cushion assembly, and when the driving member rotates toward the other side, the first output end of the transmission mechanism is used to drive the control end in the angle adjustment mechanism to rotate so that the angle adjustment mechanism releases the lock on the backrest bracket.
[0005] The car seat of the present invention, wherein the transmission mechanism includes a first rotating frame, a second rotating frame, a first tensioning structure and a second tensioning structure, a support shaft is fixed on the side wall of the seat frame, the lower end of the first rotating frame and the lower end of the second rotating frame are sequentially sleeved on the outside of the support shaft from the inside to the outside and are rotatably connected to the support shaft, the upper end of the first rotating frame forms the first output end of the transmission mechanism, and the upper end of the second rotating frame forms the second output end of the transmission mechanism; the driving member includes a rotating part and a handle part, the handle part is connected to one side of the rotating part, the rotating part is sleeved on the support shaft located on the outside of the second rotating frame and is rotatably connected to the support shaft, the inner side wall of the rotating part is connected to a plug rod, the axis of the plug rod is parallel to the axis of the support shaft and The insertion rod is eccentrically arranged with the supporting shaft; a waist-shaped hole is arranged in the middle of the first rotating frame for inserting the insertion rod and for sliding the insertion rod when the driving member rotates to one side, and the rear side of the second rotating frame abuts against the insertion rod; a push rod is arranged at the upper end of the first rotating frame, and when the driving member rotates to the other side, the push rod is used to push the control end in the driving angle adjustment mechanism to rotate so that the angle adjustment mechanism releases the lock of the backrest bracket; one end of the first tensioning structure is connected to the seat frame, and the other end of the first tensioning structure is connected to the first rotating frame. When the driving member is released, the first tensioning structure is used to drive the first rotating frame to rotate and reset so that the first rotating frame releases the push on the control end and makes the push rod abut against the rear side of the second rotating frame; One end of the second tensioning structure is connected to the upper end of the second rotating frame, and the other end of the second tensioning structure is connected to the seat frame. When the driving member is released, the second tensioning structure is used to drive the second rotating frame to rotate and reset so that the second rotating frame releases the pulling of the traction line. A limit block is provided on the side wall of the seat frame, which is used to abut against the upper end of the second rotating frame to limit the rotation range of the second rotating frame when the second tensioning structure drives the second rotating frame to rotate and reset to limit the rotation range of the second rotating frame. The tensioning force of the second tensioning structure is greater than the tensioning force of the first tensioning structure. After adopting this transmission mechanism and driving member, when the handle part is pulled to make the driving member rotate to one side (counterclockwise), the insertion rod connected to the rotating part can push the second rotating frame to rotate. At this time , the upper end of the second rotating frame can pull the other end of the traction line. When the other end of the traction line is pulled, the traction line can pull the control end of the inclination adjustment mechanism. At this time, the inclination adjustment mechanism can release the lock of the seat cushion assembly. In this way, the seat cushion assembly can rotate relative to the seat frame under the adjustment of the driver and the passenger, that is, the inclination of the seat cushion assembly is adjusted. When the handle part is released, under the action of the second tensioning structure, the upper end of the second rotating frame can rotate and reset. At this time, the second rotating frame can release the pulling state of the traction line. In this way, the inclination adjustment mechanism located in the car seat can lock the seat cushion assembly again, that is, the locking of the seat cushion assembly after the inclination adjustment is realized;When the handle portion is pulled to make the driving member rotate to the other side (clockwise), the insertion rod connected to the rotating portion can push the first rotating frame to rotate. At this time, the push rod located on the first rotating frame can push the control end in the angle adjustment mechanism to rotate. After the control end in the angle adjustment mechanism is rotated, the angle adjustment mechanism can release the lock of the backrest bracket. In this way, the backrest bracket can be rotated relative to the seat frame under the adjustment of the driver and the passenger, that is, the angle adjustment of the backrest bracket and the backrest assembly located on the backrest bracket is achieved. When the handle portion is released, the first rotating frame can be rotated and reset under the action of the first tensioning structure. At this time, the push rod located on the first rotating frame can release the pushing effect on the control end in the angle adjustment mechanism, that is, the control end in the angle adjustment mechanism can be reset by relying on its internal reset structure. After the control end is reset, the angle adjustment mechanism can lock the backrest bracket and the backrest assembly on the backrest bracket again, that is, the backrest bracket and the backrest assembly after the angle adjustment are locked; by setting the tensioning force of the second tensioning structure to be greater than the tensioning force of the first tensioning structure, the second rotating frame can be prevented from being pulled and rotated by the first tensioning structure under non-human factors, that is, the other end of the traction line in the cable can be prevented from being accidentally pulled, resulting in the inclination adjustment mechanism accidentally unlocking the cushion assembly; by setting the limit block, the second rotating frame can be prevented from excessively pushing the first rotating frame to rotate under the action of the second tensioning structure, that is, the push rod can be prevented from pushing the control end of the angle adjustment mechanism under non-human factors, that is, the angle adjustment mechanism can be prevented from accidentally unlocking the backrest bracket. ;
[0006] The car seat of the present invention has a slot on the seat frame, and the other end of the outer sleeve in the cable is clamped in the slot; by adopting this structure, the other end of the outer sleeve in the cable can be reliably connected to the seat frame.
[0007] The car seat of the present invention has a slot at the upper end of the second rotating frame, and the other end of the traction line in the cable is plugged into the slot; by adopting this structure, the other end of the traction line in the cable can be reliably connected to the second rotating frame.
[0008] The car seat of the present invention, wherein the first tensioning structure comprises a first tension spring, one end of the first tension spring is hooked with the seat frame, and the other end of the first tension spring is hooked with the first rotating frame; by adopting the first tension spring as the first tensioning structure, it has the advantages of simple structure and low cost, and in addition, it also has the advantage of easy assembly of the first tensioning structure.
[0009] The car seat of the present invention, wherein the second tensioning structure includes a second tension spring, one end of the second tension spring is hooked with the upper end of the second rotating frame, and the other end of the second tension spring is hooked with the seat frame; by adopting the second tension spring as the second tensioning structure, it has the advantages of simple structure and low cost, and also has the advantage of easy assembly of the second tensioning structure.
[0010] The car seat of the present invention is characterized in that a shaft hole is provided in the middle of the rotating part for inserting a support shaft so that the rotating part and the support shaft are rotatably connected. After the rotating part and the support shaft are rotatably connected, a bolt is threadedly connected on the outer end of the support shaft to block the rotating part and prevent the rotating part from detaching from the support shaft. By adopting this structure, the rotating part can be reliably rotatably connected with the support shaft.
[0011] In the car seat of the present invention, a cover for covering the support shaft and the bolts on the support shaft is installed on the outer end of the rotating part; through the setting of the cover, the cover can cover the support shaft, so that the support shaft can be prevented from being exposed to the outside, thereby improving the aesthetics.
[0012] The car seat of the present invention is characterized in that a plurality of circumferentially distributed hooks are arranged at the edge of the baffle cover facing the rotating part, and the rotating part is provided with hook holes corresponding to the hooks one by one, and each hook passes through the hook hole at the corresponding position and is engaged with the rotating part at the edge of the hook hole; by adopting this structure, the baffle cover can be conveniently assembled with the rotating part.
[0013] The car seat of the present invention has a decorative frame fixed on the side wall of the seat frame, a through hole for the support shaft to pass through is provided in the decorative frame, and an arc hole for the insertion rod to pass through and slide is provided in the decorative frame; through the setting of the decorative frame, the decorative frame can play a decorative role on the seat frame, and through the setting of the arc hole, when the rotating part drives the insertion rod to rotate, the arc hole can play a role of avoiding air.
[0014] The driving member inside the present invention can unlock the seat cushion assembly and the backrest bracket respectively by rotating in two directions. In this way, only one control handle mechanism consisting of a driving member is required on the car seat. In this way, not only the structure of the car seat can be simplified and the production and assembly efficiency of the car seat can be improved, but also the production cost of the car seat can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:
[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;
[0017] Figure 2 It is a schematic diagram of a partially exploded three-dimensional structure of the present invention;
[0018] Figure 3 It is a schematic diagram of a three-dimensional structure of the present invention after removing part of the structure;
[0019] Figure 4 Another three-dimensional structural schematic diagram of the present invention after removing part of the structure;
[0020] Figure 5 It is a schematic diagram of the partial exploded structure of the driving parts. DETAILED DESCRIPTION
[0021] The following will disclose multiple embodiments of the present invention with drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. That is, in some embodiments of the present invention, these practical details are not necessary. In addition, for the purpose of simplifying the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.
[0022] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
[0023] The automobile seat of the present invention comprises a seat frame 1, a seat cushion assembly 2, a backrest bracket 3 and a cable 4, wherein the seat cushion assembly 2 is connected to the front side of the upper end of the seat frame 1 through a tilt adjustment mechanism, the backrest bracket 3 is connected to the rear side of the upper end of the seat frame 1 through an angle adjustment mechanism, one end of an outer sleeve 41 in the cable 4 is connected to a housing in the tilt adjustment mechanism, one end of a traction line 42 in the cable 4 is connected to a control end in the tilt adjustment mechanism, a transmission mechanism is installed on the seat frame 1, a driving member 5 for driving the transmission mechanism is rotatably connected to the seat frame 1, and the angle adjustment mechanism The control end 6 in the structure is connected to the first output end of the transmission mechanism, the other end of the outer sleeve 41 in the cable 4 is connected to the seat frame 1, and the other end of the traction line 42 in the cable 4 is connected to the second output end of the transmission mechanism. When the driving member 5 rotates to one side, the second output end of the transmission mechanism is used to pull the traction line 42 so that the inclination adjustment mechanism releases the lock of the cushion assembly 2. When the driving member 5 rotates to the other side, the first output end of the transmission mechanism is used to drive the control end 6 in the angle adjustment mechanism to rotate so that the angle adjustment mechanism releases the lock of the backrest bracket 3.
[0024] The transmission mechanism includes a first rotating frame 71, a second rotating frame 72, a first tensioning structure and a second tensioning structure. A support shaft 11 is fixed to the side wall of the seat frame 1. The lower end of the first rotating frame 71 and the lower end of the second rotating frame 72 are sequentially sleeved on the outside of the support shaft 11 from the inside to the outside and are rotatably connected to the support shaft 11. The upper end of the first rotating frame 71 forms a first output end of the transmission mechanism, and the upper end of the second rotating frame 72 forms a second output end of the transmission mechanism. The driving member 5 includes a rotating portion 51 and a handle portion 52, and the handle portion 52 is connected to the rotating portion On one side of the first rotating frame 71, the rotating portion 51 is sleeved on the support shaft 11 located outside the second rotating frame 72 and is rotatably connected to the support shaft 11. A plug rod 53 is connected to the inner wall of the rotating portion 51. The axis of the plug rod 53 is parallel to the axis of the support shaft 11 and the plug rod 53 is eccentrically arranged with the support shaft 11. A waist-shaped hole 711 is provided in the middle of the first rotating frame 71 for inserting the plug rod 53 and for sliding the plug rod 53 when the driving member 5 rotates to one side. The rear side of the second rotating frame 72 abuts against the plug rod 53. The upper end of the first rotating frame 71 is provided with Push rod 712, when the driving member 5 rotates to the other side, the push rod 712 is used to push the control end 6 in the driving angle adjustment mechanism to rotate so that the angle adjustment mechanism releases the lock of the backrest bracket 3; one end of the first tensioning structure is connected to the seat frame 1, and the other end of the first tensioning structure is connected to the first rotating frame 71. When the driving member 5 is released, the first tensioning structure is used to drive the first rotating frame 71 to rotate and reset so that the first rotating frame 71 releases the push on the control end 6 and makes the push rod 712 abut against the rear side of the second rotating frame 72; the second tensioning structure One end of the second tensioning structure is connected to the upper end of the second rotating frame 72, and the other end of the second tensioning structure is connected to the seat frame 1. When the driving member 5 is released, the second tensioning structure is used to drive the second rotating frame 72 to rotate and reset so that the second rotating frame 72 releases the pulling of the traction line 42. The side wall of the seat frame 1 is provided with a limit block 12 used to abut against the upper end of the second rotating frame 72 to limit the rotation range of the second rotating frame 72 when the second tensioning structure drives the second rotating frame 72 to rotate and reset. The tensioning force of the second tensioning structure is greater than the tensioning force of the first tensioning structure;By adopting this transmission mechanism and driving member, when the handle portion is pulled to make the driving member rotate to one side (counterclockwise), the insertion rod connected to the rotating portion can push the second rotating frame to rotate. At this time, the upper end of the second rotating frame can pull the other end of the traction line. When the other end of the traction line is pulled, the traction line can pull the control end of the reclining mechanism. At this time, the reclining mechanism can release the lock of the seat cushion assembly. In this way, the seat cushion assembly can rotate relative to the seat frame under the adjustment of the driver and the passenger, that is, the inclination angle of the seat cushion assembly is adjusted. When the handle portion is released, under the action of the second tensioning structure, the upper end of the second rotating frame can When the handle is pulled to rotate the driving member to the other side (clockwise), the plug rod connected to the rotating part can push the first rotating frame to rotate. At this time, the push rod located on the first rotating frame can push the control end in the angle adjustment mechanism to rotate. After the control end in the angle adjustment mechanism rotates, the angle adjustment mechanism can release the lock of the backrest bracket. In this way, the backrest bracket can be adjusted by the driver and the passenger. When the handle is released, the first rotating frame can be rotated and reset under the action of the first tensioning structure. At this time, the push rod on the first rotating frame can release the pushing effect on the control end in the angle adjustment mechanism, that is, the control end in the angle adjustment mechanism can be reset by relying on the reset structure inside it. After the control end of the angle adjustment mechanism is reset, the angle adjustment mechanism can lock the backrest bracket and the backrest assembly on the backrest bracket again, that is, the locking of the backrest bracket and the backrest assembly after the angle adjustment is realized. By setting the tensioning force of the second tensioning structure to be greater than the tensioning force of the first tensioning structure, the second rotating frame can be prevented from being pulled and rotated by the first tensioning structure under non-human factors, that is, the other end of the traction line in the cable can be prevented from being accidentally pulled, resulting in the inclination adjustment mechanism accidentally unlocking the seat cushion assembly; by setting the limit block, the second rotating frame can be prevented from excessively pushing the first rotating frame to rotate under the action of the second tensioning structure, that is, the push rod can be prevented from pushing the control end of the angle adjustment mechanism under non-human factors, that is, the angle adjustment mechanism can be prevented from accidentally unlocking the backrest bracket. ;
[0025] The seat frame 1 is provided with a slot 13, and the other end of the outer sleeve 41 in the cable 4 is clamped in the slot 13; by adopting this structure, the other end of the outer sleeve in the cable can be reliably connected to the seat frame.
[0026] The upper end of the second rotating frame 72 is provided with a slot 721, and the other end of the traction line 42 in the cable 4 is plugged into the slot 721; by adopting this structure, the other end of the traction line in the cable can be reliably connected to the second rotating frame.
[0027] The first tensioning structure includes a first tension spring 73, one end of the first tension spring 73 is hooked with the seat frame 1, and the other end of the first tension spring 73 is hooked with the first rotating frame 71; by adopting the first tension spring as the first tensioning structure, it has the advantages of simple structure and low cost. In addition, it also has the advantage of easy assembly of the first tensioning structure.
[0028] The second tensioning structure includes a second tension spring 74, one end of the second tension spring 74 is hooked to the upper end of the second rotating frame 72, and the other end of the second tension spring 74 is hooked to the seat frame 1; by adopting the second tension spring as the second tensioning structure, it has the advantages of simple structure and low cost. In addition, it also has the advantage of easy assembly of the second tensioning structure.
[0029] A shaft hole 511 is provided in the middle of the rotating part 51 for inserting the support shaft 11 so that the rotating part 51 is rotatably connected to the support shaft 11. After the rotating part 51 is rotatably connected to the support shaft 11, a bolt is threadedly connected to the outer end of the support shaft 11 to block the rotating part 51 and prevent the rotating part 51 from detaching from the support shaft 11. By adopting this structure, the rotating part can be reliably rotatably connected to the support shaft.
[0030] A cover 54 for covering the support shaft 11 and the bolts on the support shaft 11 is installed on the outer end of the rotating part 51; through the setting of the cover, the cover can cover the support shaft, so that the support shaft can be prevented from being exposed to the outside, thereby improving the aesthetics.
[0031] A plurality of circumferentially distributed hooks 541 are provided at the edge of the blocking cover 54 facing the rotating part 51, and the rotating part 51 is provided with holes 512 corresponding to the hooks 541 one by one. Each hook 541 passes through the hole 512 at the corresponding position and then engages with the rotating part 51 at the edge of the hole 512. By adopting this structure, the blocking cover can be easily assembled with the rotating part.
[0032] A decorative frame 8 is fixed on the side wall of the seat frame 1, and a through hole 81 is provided in the decorative frame 8 for the support shaft 11 to pass through, and an arc hole 82 is provided in the decorative frame 8 for the insertion rod 53 to pass through and slide; through the setting of the decorative frame, the decorative frame can play a decorative role on the seat frame, and through the setting of the arc hole, when the rotating part drives the insertion rod to rotate, the arc hole can play a role of avoiding air.
[0033] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims
1. A car seat, comprising a seat frame (1), a seat cushion assembly (2), a backrest bracket (3) and a cable (4), wherein the seat cushion assembly (2) is connected to the front side of the upper end of the seat frame (1) via a tilt adjustment mechanism, the backrest bracket (3) is connected to the rear side of the upper end of the seat frame (1) via an angle adjustment mechanism, one end of an outer sleeve (41) in the cable (4) is connected to a housing in the tilt adjustment mechanism, and one end of a traction line (42) in the cable (4) is connected to a control end in the tilt adjustment mechanism, characterized in that: The seat frame (1) is provided with a transmission mechanism, the seat frame (1) is rotatably connected with a driving member (5) for driving the transmission mechanism, the control end (6) in the angle adjustment mechanism is transmission-connected to a first output end of the transmission mechanism, the other end of the outer sleeve (41) in the cable (4) is connected to the seat frame (1), the other end of the traction line (42) in the cable (4) is connected to a second output end of the transmission mechanism, when the driving member (5) rotates to one side, the second output end of the transmission mechanism is used to pull the traction line (42) so that the inclination adjustment mechanism releases the lock on the cushion assembly (2), and when the driving member (5) rotates to the other side, the first output end of the transmission mechanism is used to pull the traction line (42) so that the inclination adjustment mechanism releases the lock on the cushion assembly (2). The output end is used to drive the control end (6) in the angle adjustment mechanism to rotate so that the angle adjustment mechanism releases the lock on the backrest bracket (3); the transmission mechanism comprises a first rotating frame (71), a second rotating frame (72), a first tensioning structure and a second tensioning structure; a support shaft (11) is fixed on the side wall of the seat frame (1); the lower end of the first rotating frame (71) and the lower end of the second rotating frame (72) are sequentially sleeved on the outside of the support shaft (11) from the inside to the outside and are rotatably connected to the support shaft (11); the upper end of the first rotating frame (71) forms the first output end of the transmission mechanism, and the upper end of the second rotating frame (72) forms the second output end of the transmission mechanism; the driving member (5) comprises a rotary The rotary part (51) and the handle part (52) are connected to one side of the rotary part (51); the rotary part (51) is sleeved on a support shaft (11) located outside the second rotary frame (72) and is rotatably connected to the support shaft (11); an insertion rod (53) is connected to the inner side wall of the rotary part (51); the axis of the insertion rod (53) is parallel to the axis of the support shaft (11), and the insertion rod (53) and the support shaft (11) are eccentrically arranged; a waist-shaped hole (711) is provided in the middle of the first rotary frame (71) for inserting the insertion rod (53) and for sliding the insertion rod (53) when the driving member (5) rotates to one side; the rear side of the second rotary frame (72) is connected to the insertion rod (53) abutment; a push rod (712) is provided at the upper end of the first rotating frame (71); when the driving member (5) rotates toward the other side, the push rod (712) is used to push the control end (6) in the driving angle adjustment mechanism to rotate so that the angle adjustment mechanism releases the lock on the backrest bracket (3); one end of the first tensioning structure is connected to the seat frame (1), and the other end of the first tensioning structure is connected to the first rotating frame (71); when the driving member (5) is released, the first tensioning structure is used to drive the first rotating frame (71) to rotate and reset so that the first rotating frame (71) releases the push on the control end (6) and causes the push rod (712) to abut against the rear side of the second rotating frame (72);One end of the second tensioning structure is connected to the upper end of the second rotating frame (72), and the other end of the second tensioning structure is connected to the seat frame (1). When the driving member (5) is released, the second tensioning structure is used to drive the second rotating frame (72) to rotate and reset so that the second rotating frame (72) releases the pulling of the traction line (42). A limit block (12) is provided on the side wall of the seat frame (1) and is used to abut against the upper end of the second rotating frame (72) to limit the rotation range of the second rotating frame (72) when the second tensioning structure drives the second rotating frame (72) to rotate and reset. The tensioning force of the second tensioning structure is greater than the tensioning force of the first tensioning structure. A clamping groove (13) is provided on the seat frame (1), and the other end of the outer sleeve (41) in the cable (4) is clamped with the clamping groove (13). A slot (721) is provided on the upper end of the second rotating frame (72), and the other end of the traction line (42) in the cable (4) is plugged with the slot (721). ; 2. The vehicle seat according to claim 1, characterized in that: The first tensioning structure comprises a first tension spring (73), one end of the first tension spring (73) being hooked to the seat frame (1), and the other end of the first tension spring (73) being hooked to the first rotating frame (71).
3. The vehicle seat according to claim 1, characterized in that: The second tensioning structure comprises a second tension spring (74), one end of the second tension spring (74) being hooked to the upper end of the second rotating frame (72), and the other end of the second tension spring (74) being hooked to the seat frame (1).
4. The vehicle seat according to claim 1, characterized in that: A shaft hole (511) is provided in the middle of the rotating part (51) for inserting the support shaft (11) so that the rotating part (51) and the support shaft (11) are rotatably connected. After the rotating part (51) and the support shaft (11) are rotatably connected, a bolt is threadedly connected on the outer end of the support shaft (11) for blocking the rotating part (51) to prevent the rotating part (51) from being separated from the support shaft (11).
5. The vehicle seat according to claim 4, characterized in that: A blocking cover (54) for shielding the support shaft (11) and the bolts located on the support shaft (11) is installed on the outer end of the rotating part (51).
6. The vehicle seat according to claim 5, characterized in that: A plurality of circumferentially distributed hooks (541) are provided at an edge of the blocking cover (54) on a side facing the rotating portion (51); the rotating portion (51) is provided with hook holes (512) corresponding to the hooks (541) one by one; each hook (541) passes through a hook hole (512) at a corresponding position and then engages with the rotating portion (51) at the edge of the hook hole (512) where it is located.
7. The vehicle seat according to claim 1, characterized in that: A decorative frame (8) is fixed on the side wall of the seat frame (1), and a through hole (81) for the support shaft (11) to pass through is provided in the decorative frame (8), and an arc-shaped hole (82) for the insertion rod (53) to pass through and slide is provided in the decorative frame (8).