Backrest locking structure of back-chasing seat

Abstract

The backrest locking structure comprises a seat supporting seat (1), the seat supporting seat (1) extends upwards to form a supporting part (2), a cushion support (3) is arranged outside the supporting part (2), and the end, close to the supporting part (2), of the cushion support (3) extends upwards to form a backrest support (4); the backrest support (4) rotates relative to the cushion support (3) for back tracking; the backrest support (4) can rotate relative to the cushion support (3) for back chasing; according to the backrest locking structure of the back-chasing seat, the structure is compact, locking is reliable, operation is smooth, the seat inclination angle adjusting and locking function is achieved, and the comfort of a user and the use reliability are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of seats, and in particular to a backrest locking structure of a reclining seat. Background Art

[0002] As an important design to improve riding comfort, the convenient adjustment and stable locking of the backrest angle of the reclining seat are key. In the existing technology, the reclining mechanism of the seat mostly relies on a single torsion spring to provide rebound force, which is prone to uneven force on both sides, resulting in adjustment jamming or abnormal noise; at the same time, the locking structure often uses simple ratchets or latches, which have the risk of slipping teeth and accidental unlocking during frequent adjustments or load-bearing conditions, and the reset process lacks buffering, affecting the user experience. In addition, the traditional linkage mechanism is complex and bulky, and it is difficult to achieve precise synchronous control of the bilateral mechanisms in a small space, resulting in a jerky operating feel and reduced reliability. Therefore, there is an urgent need for a seat reclining and locking solution with a compact structure, reliable locking, smooth operation and buffering function to improve user comfort and reliability during use. Summary of the Invention

[0003] (1) Technical issues to be resolved

[0004] The technical problem to be solved by the present invention is to provide a backrest locking structure for a reclining seat, which can ensure that the seat back fits the human body, the seat inclination angle can be freely adjusted, and the operation is convenient.

[0005] (2) Technical solution

[0006] The embodiments of this specification provide the following technical solutions:

[0007] The embodiment of the present specification provides a backrest locking structure for a reclining seat, characterized in that it includes a seat support base, the seat support base extending upwardly from a support portion, the support portion being provided with a seat cushion support on the outside, and the seat cushion support extending upwardly near one end of the seat cushion support close to the support portion to form a backrest support; the backrest support can be rotated relative to the seat cushion support to retract; the seat cushion support includes an angle locking mechanism, the angle locking mechanism includes an angle locking switch and a rotation-stopping assembly linked to the angle locking switch; the backrest support is provided with a backrest rotation portion and a backrest rotation stopper cooperating with the rotation-stopping assembly, and the backrest rotation stopper is fixedly arranged on the backrest rotation portion; when the angle locking switch is in an on state, the rotation-stopping assembly and the backrest rotation stopper are in an engaged connection state, and the backrest is locked at an angle relative to the seat cushion support; when the angle locking switch is in a closed state, the rotation-stopping assembly and the backrest rotation stopper are in a non-engaged state, and the backrest is unlocked.

[0008] In the above technical solution, when the angle locking mechanism does not restrict the backrest rotation part, the backrest support can be rotated through the backrest rotation part, thereby increasing the comfort of the reclining seat; when the user sits on the seat, as long as it is within the rotation range of the backrest rotation part, the backrest always fits the user's back regardless of leaning back or forward.

[0009] Furthermore, a seat mounting seat is arranged outside the support portion, and the seat cushion support is arranged on the seat mounting seat; a rotating shaft is arranged inside the backrest rotating portion, and the rotating shaft passes through the seat mounting seat and is connected to the support portion.

[0010] In the above technical solution, the seat mounting base is first installed on the support part, and then the seat cushion support is installed through the seat mounting base; the rotation axis is set on both sides of the support part, and the backrest support rotates around the rotation axis when rotating.

[0011] Furthermore, the backrest rotating part includes an internal gear coaxial with the rotating shaft; the anti-rotation assembly includes a pull rod, a anti-rotation disc, a anti-rotation block, and a sleeve; the sleeve is sleeved on the rotating shaft, and the pull rod and the anti-rotation disc are provided on the outer wall of the sleeve. The anti-rotation disc is provided at one end close to the internal gear, and the anti-rotation disc is coaxial with the rotating shaft. The disc surface of the anti-rotation disc is inclined to provide strip holes, and a plurality of strip holes are provided and are evenly arranged in a ring-shaped row. A movable hook is provided between the anti-rotation block and the strip hole, and the number of the movable hooks and the anti-rotation blocks corresponds to the strip holes.

[0012] In the above technical solution, when it is necessary to lock the rotating part of the backrest, pull the pull rod and drive the anti-rotation disc to rotate. When the anti-rotation disc rotates, the strip hole rotates. Since the anti-rotation block and the strip hole are connected by a movable hook, the strip hole will drive the anti-rotation block to translate. The anti-rotation block translates to engage with the internal gear, thereby limiting the rotation of the internal gear. The rotating part of the backrest is locked, and to unlock it, just pull the pull rod in the opposite direction.

[0013] Furthermore, the anti-rotation component is provided with a supporting ring, the end of the supporting ring is not connected to the end, and the supporting ring is provided in the movable hook, close to one end of the anti-rotation block.

[0014] In the above technical solution, the support ring is not connected at the first part, so it can be pushed by external force to achieve inward or outward contraction. The support ring is set in the movable hook to support the movable hook and ensure that the anti-rotation block always maintains a set distance from the anti-rotation disc; when the backrest rotating part is unlocked, the support ring contracts, and when the backrest rotating part is locked, the support ring rebounds.

[0015] Furthermore, the backrest rotating part includes a first backrest rotating part and a second backrest rotating part arranged on both sides of the seat cushion support, a first torsion spring is arranged inside the first backrest rotating part; a second torsion spring is arranged inside the second backrest rotating part; the first torsion spring and the second torsion spring are both mounted on the rotating shaft.

[0016] Furthermore, a connecting shaft is provided between the angle locking switch and the anti-rotation assembly; the connecting shaft includes a main connecting shaft, a forked connecting piece, a first secondary connecting shaft, and a second secondary connecting shaft; one end of the main connecting shaft is connected to the angle locking switch, and the other end is connected to the forked connecting piece; the forked connecting piece extends a first secondary connecting shaft and a second secondary connecting shaft away from one end of the main connecting shaft, and the other end of the first secondary connecting shaft is connected to the pull rod in the first backrest rotating part; the other end of the second secondary connecting shaft is connected to the pull rod in the second backrest rotating part; a first support member is provided outside the first secondary connecting shaft; a second support member is provided outside the second connecting shaft; one end of the first torsion spring extends outward to cooperate with the inner wall of the first backrest rotating part, and the other end extends in the opposite direction to cooperate with the first support member; one end of the second torsion spring extends outward to cooperate with the second backrest rotating part, and the other end extends in the opposite direction to cooperate with the second support member.

[0017] In the above technical solution, the main connecting shaft can control the first secondary connecting shaft and the second secondary connecting shaft; the first support member supports the first connecting shaft to keep it stable, and the second support member supports the second connecting shaft and keeps it stable; the first torsion spring and the second torsion spring can keep the backrest support in the initial position when the backrest rotating part is not locked; through the setting of the first torsion spring and the second torsion spring, the backrest can rotate backward.

[0018] Furthermore, the connecting shaft includes a first connecting bolt arranged in the angle locking switch, a second connecting bolt arranged in the first backrest rotating part and matched with the pull rod, and a third connecting bolt arranged in the second backrest rotating part and matched with the pull rod.

[0019] Furthermore, the angle locking switch includes a shift lever, an upper mounting cover, and a lower mounting cover; the shift lever cooperates with the first connecting bolt and is arranged in the lower mounting cover, and the upper mounting cover cooperates with and covers the lower mounting cover.

[0020] In the above technical solution, by shifting the shift lever, the first coupling bolt drives the pull rod connected to the second coupling bolt and the pull rod matched with the third coupling bolt, thereby completing the locking angle of the backrest or unlocking the rotation of the backrest.

[0021] Furthermore, the backrest support includes a backrest movable rod; a backrest connecting shaft parallel to the rotation axis is provided inside the backrest rotating part; and the backrest movable rod is connected to the backrest connecting shaft.

[0022] In the above technical solution, the backrest movable rod rotates around the backrest connecting axis.

[0023] Furthermore, a damper is provided on the top of the backrest movable rod, one end of the damper is provided on the inner wall of the backrest support, and the other end is connected to the top of the backrest movable rod.

[0024] In the above technical solution, the damper can reduce the impact generated by the movable rod of the backrest.

[0025] (3) Beneficial effects

[0026] Compared with the prior art, the at least one technical solution adopted in the embodiments of this specification can achieve the following beneficial effects:

[0027] (1) The independent torsion springs built into the rotating parts of the backrest on both sides effectively balance the forces on both sides, solving the problem of jamming caused by uneven forces on one side and ensuring a smooth and stable adjustment process of the backrest angle.

[0028] (2) The anti-rotation assembly adopts a unique combination of the inclined strip hole of the anti-rotation disc, the movable hook and the anti-rotation block, combined with the support ring, which can provide reliable engagement and locking when under pressure.

[0029] (3) The forked connecting shaft cleverly realizes the precise synchronous control of the double-sided anti-rotation components by a single angle locking switch, with a compact and efficient structure. At the same time, the damper set on the top of the backrest movable rod provides a buffer for the backrest reset process, improving the operating comfort and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0031] Figure 1 Schematic diagram of the overall structure of an embodiment of the present invention;

[0032] Figure 2 A schematic structural diagram of a seat support and a backrest support according to an embodiment of the present invention;

[0033] Figure 3 This is a schematic structural diagram of an angle locking mechanism according to an embodiment of the present invention;

[0034] Figure 4 An exploded view of the angle locking mechanism according to an embodiment of the present invention;

[0035] Figure 5 A schematic structural diagram of a rotation-stopping member according to an embodiment of the present invention;

[0036] Figure 6 This is a schematic structural diagram of a backrest rotating portion according to an embodiment of the present invention;

[0037] Figure 7 An enlarged view of a backrest anti-rotation member according to an embodiment of the present invention;

[0038] Figure 8 This is a schematic structural diagram of a backrest rotating portion according to an embodiment of the present invention;

[0039] Figure 9 An enlarged view of the first backrest rotating portion and the second backrest rotating portion according to an embodiment of the present invention;

[0040] Figure 10 Schematic diagram of the structure of the connecting shaft of the angle locking mechanism according to an embodiment of the present invention;

[0041] Figure 11 This is a schematic structural diagram of an angle locking switch according to an embodiment of the present invention;

[0042] Figure 12 This is a schematic structural diagram of a first coupling bolt according to an embodiment of the present invention;

[0043] Figure 13 This is a schematic structural diagram of a second coupling bolt according to an embodiment of the present invention;

[0044] Figure 14 Schematic diagram of the structure of the backrest support according to an embodiment of the present invention.

[0045] Among them: 1-seat support seat, 2-support part, 3-seat cushion support, 4-backrest support, 5-backrest rotating part, 7-angle locking mechanism, 8-angle locking switch, 9-anti-rotation assembly, 10-seat mounting seat, 11-rotating shaft, 12-internal gear, 13-pull rod, 14-anti-rotation disc, 15-anti-rotation block, 16-sleeve, 17-strip hole, 18-movable hook, 19-support ring, 20-connecting shaft, 21-main connecting shaft, 22-forked connector, 23 -First secondary connecting shaft, 24-Second secondary connecting shaft, 25-First connecting bolt, 26-Second connecting bolt, 27-Third connecting bolt, 28-Upper mounting cover, 29-Lower mounting cover, 30-Shift rod, 42-Backrest movable rod, 43-Backrest connecting shaft, 44-Damper, 51-First backrest rotating part, 52-Second backrest rotating part, 233-First support member, 244-Second support member, 511-First torsion spring, 522-Second torsion spring, 122-Backrest anti-rotation member. DETAILED DESCRIPTION

[0046] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0047] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the features in the following embodiments and embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of this application.

[0048] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on this application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement an apparatus and / or practice a method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this apparatus and / or practice this method.

[0049] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The illustrations only show components related to the present application and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0050] Additionally, in the following description, specific details are provided to provide a thorough understanding of the examples, however, one skilled in the art will appreciate that the examples can be practiced without these specific details.

[0051] Combine Figure 1-Figure 7As shown, the present application provides a backrest locking structure of a retractable seat, including a seat support seat 1, the seat support seat 1 extends upward to form a support portion 2, a seat cushion support 3 is arranged outside the support portion 2, and the seat cushion support 3 extends upward at one end close to the support portion 2 to form a backrest support 4; the backrest support can be rotated relative to the seat cushion support for retractable seating; the seat cushion support 3 includes an angle locking mechanism 7, the angle locking mechanism 7 includes an angle locking switch 8, and a stop assembly 9 linked to the angle locking switch 8; the backrest support 4 is provided with a backrest stop member 122 that cooperates with the backrest rotating portion 5 and the stop assembly 9, and the backrest stop member 122 is fixedly arranged on the backrest rotating portion 5.

[0052] A seat mounting base 10 is disposed outside the support portion 2, and the seat cushion support 3 is disposed on the seat mounting base 10. A rotating shaft 11 is disposed inside the backrest rotating portion 5, and the rotating shaft 11 passes through the seat mounting base 10 and is connected to the support portion 2. The backrest rotating portion 5 includes an internal gear 12 coaxial with the rotating shaft 11. The anti-rotation assembly 9 includes a pull rod 13, an anti-rotation disc 14, an anti-rotation block 15, and a sleeve 16. The sleeve 16 is sleeved on the rotating shaft 11, and the pull rod 13 and anti-rotation disc 14 are disposed on the outer wall of the sleeve 16. The anti-rotation disc 14 is disposed at one end near the internal gear 12 and is coaxial with the rotating shaft 11. The disc surface of the anti-rotation disc 14 is obliquely provided with strip-shaped holes 17. There are multiple strip-shaped holes 17, and they are evenly arranged in a circular array. A movable hook 18 is disposed between the anti-rotation block 15 and the strip-shaped hole 17. The number of movable hooks 18 and anti-rotation blocks 15 corresponds to the number of strip-shaped holes 17. The anti-rotation component 9 is provided with a supporting ring 19 , which is not connected at the head and tail. The supporting ring 19 is arranged in the movable hook 18 , close to one end of the anti-rotation block 15 .

[0053] like Figure 6-8As shown, the backrest rotating part 5 includes a first backrest rotating part 51 and a second backrest rotating part 52 arranged on both sides of the seat cushion support 3, a first torsion spring 511 is arranged inside the first backrest rotating part 51; a second torsion spring 522 is arranged inside the second backrest rotating part 52; the first torsion spring 511 and the second torsion spring 522 are both sleeved on the rotating shaft 11. A connecting shaft 20 is arranged between the angle locking switch 8 and the anti-rotation component 9; the connecting shaft 20 includes a main connecting shaft 21, a forked connecting piece 22, a first secondary connecting shaft 23, and a second secondary connecting shaft 24; one end of the main connecting shaft 21 is connected to the angle locking switch 8, and the other end is connected to the forked connecting piece 22; the forked connecting piece 22 extends from one end away from the main connecting shaft 21 to form a first secondary connecting shaft 23 and a second secondary connecting shaft 24, and the other end of the first secondary connecting shaft 23 is connected to the pull rod 13 in the first backrest rotating part 51; the second secondary connecting shaft 24 The other end of the connecting shaft 24 is connected to the pull rod 13 in the second backrest rotating part 52; a first support member 233 is set on the outside of the first secondary connecting shaft 23; a second support member 244 is set on the outside of the second connecting shaft 24; one end of the first torsion spring 511 extends outward to cooperate with the inner wall of the first backrest rotating part 51, and the other end extends in the opposite direction to cooperate with the first support member 233; one end of the second torsion spring 522 extends outward to cooperate with the second backrest rotating part 52, and the other end extends in the opposite direction to cooperate with the second support member 244.

[0054] like Figure 9-11 As shown, the coupling shaft 20 includes a first coupling bolt 25 disposed within the angle lock switch 8, a second coupling bolt 26 disposed within the first backrest rotating portion 51 and engaged with the pull rod 13, and a third coupling bolt 27 disposed within the second backrest rotating portion 52 and engaged with its pull rod 13. The angle lock switch 8 includes a lever 30, an upper mounting cover 28, and a lower mounting cover 29; the lever 30 engages with the first coupling bolt 25 and is disposed within the lower mounting cover 29, which then covers the upper mounting cover 28.

[0055] like Figure 12 As shown, the backrest support 4 includes a backrest movable rod 42; a backrest connecting shaft 43 is disposed within the backrest rotating portion 5 and is parallel to the rotating shaft 11; the backrest movable rod 42 is connected to the backrest connecting shaft 43. A damper 44 is disposed at the top of the backrest movable rod 42. The damper 44 is configured as a pneumatic spring, with one end of the damper 44 disposed on the inner wall of the backrest support 4 and the other end connected to the top of the backrest movable rod 42.

[0056] When the present invention is in use, the user sits on the seat. At this time, the angle locking mechanism 7 does not lock the backrest rotating part 5, and the backrest support 4 can rotate so that the backrest always fits the user's back. When it is necessary to lock the backrest rotating part 5, the lever 30 is toggled to turn the angle locking switch 8 to the on state. The lever 30 drives the first connecting bolt 25 to move. When the first connecting bolt 25 moves, it pulls the main connecting shaft 21, so that the second connecting bolt 26 of the first secondary connecting shaft 23 and the third connecting bolt 27 of the second secondary connecting shaft 24 pull the pull rod 13, and the pull rod 13 causes the sleeve 16 to rotate. When the backrest 10 is unlocked, the lever 30 is pushed in the opposite direction to close the angle locking switch 8, and the stop block 15 is separated from the internal gear 12 and is in a non-engaged state. At this time, the backrest 10 is unlocked and the backrest support 4 can rotate.

[0057] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A backrest locking structure for a rear-seat, characterized in that: The invention comprises a seat support seat (1), wherein the seat support seat (1) extends upwardly to form a support portion (2), a seat cushion support (3) is arranged outside the support portion (2), and one end of the seat cushion support (3) close to the support portion (2) extends upwardly to form a backrest support (4); the backrest support (4) rotates relative to the seat cushion support (3) to chase the backrest; the seat cushion support (3) comprises an angle locking mechanism (7), the angle locking mechanism (7) comprises an angle locking switch (8), and a rotation-stopping component (9) linked to the angle locking switch (8); the backrest support (4) comprises a backrest rotating portion (5), and a backrest rotation-stopping member (122) matched with the rotation-stopping member (9), and the backrest rotation-stopping member (122) is fixedly arranged on the backrest rotating portion (5); When the angle locking switch (8) is turned on, the anti-rotation component (9) moves to a state in which it is engaged with the backrest anti-rotation member (122), and the angle of the backrest relative to the seat support (3) is locked; when the angle locking switch (8) is turned off, the anti-rotation component (9) moves to a state in which it is disengaged from the backrest anti-rotation member (122), and the backrest is unlocked.

2. The backrest locking structure of a reclining seat according to claim 1, characterized in that: A seat mounting seat (10) is provided outside the support portion (2), and the seat cushion support (3) is provided on the seat mounting seat (10); a rotating shaft (11) is provided inside the backrest rotating portion (5), and the rotating shaft (11) passes through the seat mounting seat (10) and is connected to the support portion (2).

3. The backrest locking structure of a reclining seat according to claim 2, characterized in that: The backrest anti-rotation member (122) is an internal gear (12) coaxial with the rotating shaft (11); the anti-rotation assembly (9) includes a pull rod (13), an anti-rotation disc (14), an anti-rotation block (15), and a sleeve (16); the sleeve (16) is sleeved on the rotating shaft (11), and the pull rod (13) and the anti-rotation disc (14) are provided on the outer wall of the sleeve (16); the anti-rotation disc (14) is provided at one end close to the internal gear (12), and the anti-rotation disc (14) is aligned with the rotating shaft ( 11) coaxial, the disc surface of the anti-rotation disc (14) is inclined to set strip holes (17), a plurality of strip holes (17) are set, and are evenly arranged in a ring-shaped row, a movable hook (18) is set between the anti-rotation block (15) and the strip holes (17), and the number of the movable hook (18) and the anti-rotation block (15) corresponds to the number of the strip holes (17); the anti-rotation block (15) is matched with the internal gear (12) so that the rotation of the internal gear (12) is locked or unlocked.

4. The backrest locking structure of a reclining seat according to claim 3, characterized in that: The anti-rotation component (9) is provided with a supporting ring (19), the end of the supporting ring (19) is not connected to the end, and the supporting ring (19) is provided in the movable hook (18) near one end of the anti-rotation block (15).

5. The backrest locking structure of a reclining seat according to claim 1, characterized in that: The backrest rotating part (5) comprises a first backrest rotating part (51) and a second backrest rotating part (52) arranged on both sides of the seat cushion support (3); a first torsion spring (511) is arranged inside the first backrest rotating part (51); a second torsion spring (522) is arranged inside the second backrest rotating part (52); and the first torsion spring (511) and the second torsion spring (522) are both sleeved on the rotating shaft (11).

6. The backrest locking structure of a reclining seat according to claim 5, characterized in that: A connecting shaft (20) is provided between the angle locking switch (8) and the anti-rotation assembly (9); the connecting shaft (20) comprises a main connecting shaft (21), a bifurcated connecting member (22), a first secondary connecting shaft (23), and a second secondary connecting shaft (24); one end of the main connecting shaft (21) is connected to the angle locking switch (8), and the other end is connected to the bifurcated connecting member (22); the bifurcated connecting member (22) extends from one end of the main connecting shaft (21) to form a first secondary connecting shaft (23) and a second secondary connecting shaft (24); the other end of the first secondary connecting shaft (23) is connected to the pull rod (13) in the first backrest rotating part (51) ); the other end of the second auxiliary connecting shaft (24) is connected to the pull rod (13) in the second backrest rotating part (52); a first support member (233) is provided outside the first auxiliary connecting shaft (23); a second support member (244) is provided outside the second connecting shaft (24); one end of the first torsion spring (511) extends outward to cooperate with the inner wall of the first backrest rotating part (51), and the other end extends in the opposite direction to cooperate with the first support member (233); one end of the second torsion spring (522) extends outward to cooperate with the second backrest rotating part (52), and the other end extends in the opposite direction to cooperate with the second support member (244).

7. The backrest locking structure of a reclining seat according to claim 6, characterized in that: The coupling shaft (20) includes a first coupling bolt (25) disposed in the angle locking switch (8), a second coupling bolt (26) disposed in the first backrest rotating portion (51) and cooperating with the pull rod (13), and a third coupling bolt (27) disposed in the second backrest rotating portion (52) and cooperating with the pull rod (13).

8. The backrest locking structure of a reclining seat according to claim 7, characterized in that: The angle locking switch (8) comprises a shift lever (30), an upper mounting cover (28), and a lower mounting cover (29); the shift lever (30) cooperates with the first coupling bolt (25) and is disposed in the lower mounting cover (29); the upper mounting cover (28) cooperates with and covers the lower mounting cover (29).

9. The backrest locking structure of a reclining seat according to claim 1, characterized in that: The backrest support (4) includes a backrest movable rod (42); a backrest connecting shaft (43) parallel to the rotating shaft (11) is provided inside the backrest rotating portion (5); and the backrest movable rod (42) is connected to the backrest connecting shaft (43).

10. The backrest locking structure of a reclining seat according to claim 9, characterized in that: A damper (44) is provided on the top of the backrest movable rod (42); one end of the damper (44) is provided on the inner wall of the backrest support (4), and the other end is connected to the top of the backrest movable rod (42).

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