Seat headrest lifting mechanism

Abstract

The utility model relates to a seat headrest lifting mechanism which comprises a lifting plate used for being connected to a seat, a lifting cover used for being connected to a headrest and an adjusting assembly used for limiting movement of the lifting cover. The adjusting assembly comprises a limiting area, a locking piece used for being hooked on the limiting area and a first elastic piece used for pushing the locking piece to abut against the limiting area, the limiting area comprises a plurality of locking parts arranged in the length direction of the lifting plate, and the locking piece abuts against the interior of the locking parts so as to limit vertical movement of the lifting rod; the limiting area is arranged on the lifting plate and the locking piece is arranged on the lifting cover, or the limiting area is arranged on the lifting cover and the locking piece is arranged on the lifting plate. Through the cooperation between the locking piece and the locking part, step-by-step movement of the lifting cover is achieved, the lifting cover can be stably fixed to a certain position during adjustment, meanwhile, the lifting cover can be adjusted to move only by applying force to the lifting cover during lifting, and therefore adjustment of the headrest is more convenient.

Description

Technical Field

[0001] The present application relates to the technical field of seat headrests, and in particular to a seat headrest lifting mechanism. Background Art

[0002] A headrest is usually provided on a seat to support the user's neck. However, the position of the neck of people of different heights is different when they sit on the seat. Therefore, the height of the headrest needs to be adjusted to accommodate people of different heights.

[0003] The current headrest adjustment usually uses a threaded rod or a pneumatic rod as a driving element to achieve the lifting of the headrest by rotation or pressing. However, the specific adjustment height of the headrest cannot be well determined during the adjustment process, which makes the adjustment of the headrest inconvenient.

[0004] Therefore, it is necessary to propose a new technical solution to solve the above problems. Utility Model Content

[0005] In order to make the adjustment of the headrest more convenient, the present application provides a seat headrest lifting mechanism.

[0006] The present application provides a seat headrest lifting mechanism, which adopts the following technical solution:

[0007] A seat headrest lifting mechanism, comprising a lifting plate connected to a seat, a lifting cover connected to a headrest, and an adjustment assembly for limiting the movement of the lifting cover, the adjustment assembly comprising a limiting region, a locking member hooked on the limiting region, and a first elastic member for pushing the locking member to maintain contact with the limiting region, the limiting region comprising a plurality of locking portions arranged along the length direction of the lifting plate, the locking member abutting against the locking portion to limit the vertical movement of the lifting rod;

[0008] The limiting area is arranged on the lifting plate and the locking element is arranged on the lifting cover, or the limiting area is arranged on the lifting cover and the locking element is arranged on the lifting plate.

[0009] By adopting the above technical solution, the step-by-step movement of the lifting cover is achieved through the cooperation between the locking piece and the locking portion, so that the lifting cover can be stably fixed at a certain position during adjustment. At the same time, when lifting, only force needs to be applied to the lifting cover to mobilize the lifting cover to move, thereby making the adjustment of the headrest more convenient.

[0010] Optionally: the locking parts along the length direction of the lifting plate are connected to each other, the side wall of the locking part close to one end of the lifting plate is horizontally arranged, and the other end side wall of the locking part close to one end of the locking piece is inclined toward the direction of the adjacent locking part, and the locking piece is arranged to slide between adjacent locking parts and can abut against the locking part.

[0011] By adopting the above technical solution, when the headrest is pushed along the inclined direction of the side wall of the locking portion, the locking piece can automatically enter the next locking portion, making the adjustment of the headrest more convenient.

[0012] Optional: A guide portion for guiding the movement of the locking portion is provided at the position where the locking piece is provided, the guide portion is provided along the length direction of the lifting plate, an accommodating portion is provided on the side of the guide portion away from the first elastic piece, the locking piece includes a sliding portion provided for movement in the guide portion and a limiting portion for abutting against the locking portion, the sliding portion moves vertically in the guide portion and can be rotated into the accommodating portion, the loading and unloading ends of the sliding portion can simultaneously abut against the side wall of the guide portion close to the accommodating portion, a reset portion is also provided in the limiting area, the reset portion is provided at one end in the inclination direction of the side wall of the locking portion at the endmost end, and the limiting portion slides along the locking portion and the reset portion.

[0013] By adopting the above technical solution, when the locking member moves to the end of the locking portion, the sliding portion abuts against the side wall of the guide portion so that the limiting portion is no longer in the locking portion, allowing the limiting portion to move to the starting locking portion.

[0014] Optionally: a side wall of the sliding portion away from the accommodating portion is provided with a clearance groove arranged along the length direction of the lifting plate, one end of the first elastic member is arranged in the guide portion, and the other end of the first elastic member is arranged in the clearance groove.

[0015] By adopting the above technical solution, when the sliding part moves, the first elastic member is arranged by the guide part so that it can stably abut against the sliding part, thereby continuously applying force to the sliding part.

[0016] Optionally: a pushing portion is also provided in the limiting area, and the pushing portion is provided at one end of the locking portion arranged in a column and away from the reset portion, and the end of the side wall of the pushing portion away from the reset portion is inclined toward the locking portion, and the limiting portion can abut against the inclined side wall of the pushing portion to slide and move toward the locking portion.

[0017] By adopting the above technical solution, when the limiting part moves to the initial position of the locking part, the limiting part can enter the locking part under the push of the pushing part, so that the position of the headrest is limited and can continue to be adjusted.

[0018] Optionally: a first anti-slip portion is provided at the upper end of the guide portion away from the first elastic member, the lower end of the vertical side wall of the first anti-slip portion is inclined toward the direction of the first elastic member, an anti-slip groove is provided at the upper end of the sliding portion, the first anti-slip portion is clamped in the anti-slip groove at the upper end of the vertically arranged guide portion, and the upper end of the inclined guide portion can abut against the lower end of the first anti-slip portion.

[0019] By adopting the above technical solution, when the limiting part is disengaged from the locking part, the position of the sliding part can be limited by the cooperation between the first anti-slip block and the anti-slip groove, so that the movement process of the limiting part is not easily affected.

[0020] Optionally: A second anti-slip portion is provided at a position of the lower end of the guide portion away from the first elastic member, the second anti-slip portion is provided below the accommodating portion, the second anti-slip portion is provided in an arc shape, and the second anti-slip portion can abut against the lower end of the sliding portion.

[0021] By adopting the above technical solution, the position of the sliding portion is further limited by the second anti-slip portion.

[0022] Optional: The lower end of the lifting plate is detachably connected to a fixed seat, the fixed seat is used to be fixed on a seat, a limit assembly for limiting the movement of the lifting plate is provided on the fixed seat, the limit assembly includes a limit block slidably arranged on the fixed seat and a second elastic member that pushes the limit block to move, a limit groove is provided on the side wall of the lifting plate, the lower end of the lifting plate is inserted into the fixed seat, and the limit block is inserted into the limit groove.

[0023] By adopting the above technical solution, the lifting plate can be disassembled from the fixing seat, so that when the headrest is damaged or stained, the headrest can be directly disassembled for cleaning or replacement.

[0024] Optionally: a reset piece is fixed to the end of the limit block away from the second elastic piece, the reset piece is passed through the fixed seat and extends outside the fixed seat, and an avoidance groove is provided at the end of the lifting plate away from the second elastic piece, the avoidance groove passes through the lower end surface of the lifting plate and is connected with the limit groove, and the reset piece is passed through the avoidance groove and the limit groove.

[0025] By adopting the above technical solution, the reset member is used to directly push the limit block to move, so that the limit block is separated from the limit groove, which facilitates the disassembly of the lifting plate.

[0026] Optionally: a guiding slope is provided at the upper end of the limit block, and the guiding slope is inclined downward at one end away from the second elastic member.

[0027] By adopting the above technical solution, when the lifting plate abuts against the guide slope, it can drive the limit block to move toward the direction of the second elastic member so that the limit block will not hinder the process of inserting the lifting plate into the fixed seat. Then, the limit block can be automatically inserted into the limit groove under the drive of the second elastic member.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] 1. The headrest can be adjusted gradually by using the cooperation between the locking part and the locking piece, so that the adjustment of the headrest is more convenient;

[0030] 2. The sliding part can maintain the state that the limit block is disengaged from the locking part through the reset part, so that the limit part can move to the initial position of the locking part and continue to adjust the position of the headrest. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the structure of an embodiment of the present application;

[0032] Figure 2 This is a schematic diagram for illustrating the structure of a locking member according to an embodiment of the present application;

[0033] Figure 3 This is a schematic diagram for illustrating the structure of the limiting area in an embodiment of the present application;

[0034] Figure 4 This is a schematic diagram for illustrating the structure of a limiter assembly according to an embodiment of the present application;

[0035] Figure 5 This is a schematic diagram for illustrating the lower end structure of the lifting plate according to an embodiment of the present application.

[0036] In the figure, 1, lifting plate; 11, guiding part; 12, mounting groove; 13, accommodating part; 14, first anti-slip part; 15, second anti-slip part; 16, limiting groove; 17, avoiding groove; 2, lifting cover; 21, upper decorative sheet; 31, limiting area; 311, locking part; 312, resetting part; 313, pushing part; 32, locking member; 321, sliding part; 322, limiting part; 323, giving way groove; 324, anti-slip groove; 325, abutting block; 33, first elastic member; 4, fixing seat; 41, weight reduction groove; 42, guide groove; 43, decorative pressing block; 44, lower decorative sheet; 5, limiting assembly; 51, limiting block; 511, guiding inclined plane; 52, second elastic member; 53, guide bolt; 54, resetting member. DETAILED DESCRIPTION

[0037] The present application is further described in detail below in conjunction with the accompanying drawings.

[0038] The present application discloses a seat headrest lifting mechanism, such as Figure 1 As shown, it includes a lifting plate 1 for connecting to the seat, a lifting cover 2 for connecting to the headrest, and an adjustment assembly for limiting the movement of the lifting cover 2. The lifting cover 2 is sleeved outside the lifting plate 1 and moves vertically along the lifting plate 1. The lifting cover 2 is a whole composed of two cover bodies fixed by bolts. The lower end of the lifting cover 2 is fixed with an upper decorative sheet 21 by screws. The upper decorative sheet 21 is also sleeved outside the lifting plate 1 and moves with the movement of the lifting cover 2. Figure 2 and Figure 3 As shown, the adjustment assembly includes a limiting area 31, a locking member 32 for hooking on the limiting area 31, and a first elastic member 33 for pushing the locking member 32 to move. The limiting area 31 can be set on the lifting plate 1, and the locking member 32 can be set on the lifting cover 2, or the limiting area 31 can be set on the lifting cover 2 and the locking member 32 can be set on the lifting plate 1. In this embodiment, the limiting area 31 is set on the lifting cover 2, and the locking member 32 is set on the lifting plate 1. The limiting area 31 includes a plurality of locking parts 311 arranged along the length direction of the lifting plate 1. The locking parts 311 can be selected to protrude from the surface of the lifting cover 2 or to be recessed in the surface of the lifting rod. In this embodiment, the locking parts 311 are grooves opened on the lifting cover 2. The locking parts 311 are connected to each other, and the locking member 32 can be engaged in the locking parts 311 to limit the relative movement of the lifting plate 1 and the lifting cover 2. The side wall of the locking part 311 located below or the end of the side wall located above close to the locking member 32 can be tilted upward or downward, so that after the locking member 32 is engaged in the locking part 311, it can move out of the locking part 311 and enter the adjacent locking part 311 by using the tilted side wall. In this embodiment, the side wall of the locking part 311 located below is tilted downward, and the side wall of the locking part 311 located above is horizontally arranged. When the headrest connected to the lifting cover 2 is only subjected to the effect of gravity, the locking member 32 can abut against the upper side wall of the locking part 311, so that the lifting rod can maintain a stable state. When the position of the lifting cover 2 needs to be adjusted, an upward force is applied to the lifting cover 2, so that the locking member 32 moves downward along the tilted side wall of the locking part 311 and enters the downward moving locking part 311, so as to adjust the position of the headrest connected to the lifting cover 2.

[0039] A guide portion 11 parallel to the length direction of the lifting plate 1 is provided on the side wall of the lifting plate 1 near the locking portion 311. The locking member 32 includes a vertically arranged sliding portion 321 and a limiting portion 322 integrally formed on the side of the sliding portion 321 away from the lifting plate 1. The limiting portion 322 is perpendicular to the edges of the sliding portion 321 and is rounded. The limiting portion 322 can be arranged to slide in the locking portion 311, and the sliding portion 321 is arranged to slide in the guide portion 11. A mounting groove 12 connected to the guide portion 11 is also provided on the side wall of the lifting plate 1 on which the guide portion 11 is provided. The first elastic member 33 is a spring in this embodiment. The first elastic member 33 is arranged in the mounting groove 12, and one end of the first elastic member 33 abuts against the inner wall of the mounting groove 12 away from the guide portion 11, and the other end of the first elastic member 33 abuts against the sliding portion 321, thereby pushing the limiting portion 322 to be clamped in the locking portion 311. The lifting plate 1 is also provided with an accommodating portion 13, which is arranged on a side of the guide portion 11 away from the mounting groove 12 and is communicated with the guide portion 11. An abutment block 325 is provided at one end of the sliding portion 321 away from the first elastic member 33, and the lower end surface of the abutment block 325 is inclined upward away from one end of the sliding portion 321, so that after the limiting portion 322 abuts against the locking portion 311, the lower end of the abutment block 325 can abut against the bottom surface of the accommodating portion 13, thereby limiting the upward movement of the lifting cover 2.

[0040] Since the limiting portion 322 needs to be kept out of the locking portion 311 when the lifting cover 2 moves to the bottom, the limiting portion 322 can be moved to the top again. Therefore, a reset portion 312 is also provided in the limiting area 31. The reset portion 312 is provided at the bottom of the locking portion 311 and is connected to the locking portion 311. After the limiting block 51 moves to the bottom of the locking portion 311, the limiting portion 322 continues to move and enters the reset portion 312. Then, the reset portion 312 drives the sliding portion 321 to overcome the elastic force of the first elastic member 33 and remain vertical, and the sliding portion 321 moves upward relative to the guide portion 11 and the upper and lower ends of the sliding portion 321 abut against the side wall of the sliding portion 321 close to the accommodating portion 13. The first elastic member 33 is used to prevent the sliding portion 321 from moving relative to the guide portion 11. Then, the lifting cover 2 can be moved upward.

[0041] A pushing portion 313 is also provided in the limiting area 31 for pushing the limiting portion 322 into the locking portion 311. The pushing portion 313 is connected to the uppermost locking portion 311, and the upper end surface of the pushing portion 313 is inclined downward away from one end of the locking portion 311. The upper end surface of the pushing portion 313 is flush with the upper end surface of the uppermost locking portion 311. When the lifting cover 2 moves to the uppermost end, the limiting portion 322 contacts the pushing portion 313 and enters the uppermost locking portion 311 under the guidance of the pushing portion 313.

[0042] Since the sliding portion 321 will produce vertical movement, in order to enable the first elastic member 33 to always apply elastic force to the sliding portion 321, a clearance groove 323 is opened on the side wall of the sliding portion 321 away from the accommodating portion 13, and one end of the first elastic member 33 close to the sliding portion 321 abuts against the clearance groove 323, so that the first elastic member 33 is not easy to separate from the clearance groove 323.

[0043] In order to prevent the sliding part 321 from sliding downward when the lifting cover 2 moves upward, the first anti-slip part 14 is integrally formed at the upper end of the inner wall of the guide part 11 away from the first elastic member 33, the lower end surface of the first anti-slip part 14 is flush with the upper end surface of the accommodating part 13, and the lower end of the vertical side wall of the first anti-slip part 14 is inclined in the direction away from the accommodating part 13. An anti-slip groove 324 is provided at the upper end of the side wall of the sliding part 321 close to the accommodating part 13, the first anti-slip part 14 can be snapped into the anti-slip groove 324, and the side wall of the first anti-slip part 14 can fit with the inner wall of the anti-slip groove 324. The edge between the upper end of the side wall of the first anti-slip portion 14 away from the accommodating portion 13 and the upper end face of the first anti-slip portion 14 is rounded, so that when the sliding portion 321 tilts toward the accommodating portion 13 under the action of the elastic force applied by the first elastic member 33, the upper end of the sliding portion 321 can abut against the lower end of the first anti-slip portion 14 and enter the accommodating portion 13.

[0044] A second anti-slip portion 15 is integrally formed at the lower end of the side wall of the guide portion 11 close to the accommodating portion 13. The second anti-slip portion 15 is arranged in an arc shape and is arranged below the accommodating portion 13. When the first anti-slip portion 14 is engaged in the anti-slip groove 324, the lower end of the sliding portion 321 can also abut against the top of the second anti-slip portion 15, thereby further limiting the position of the vertical sliding portion 321.

[0045] like Figure 4 and Figure 5As shown, since the headrest and the like may be damaged or contaminated after long-term use, it is necessary to replace the headrest and the like, so the lower end of the lifting plate 1 is detachably provided with a fixing seat 4, which is installed on the seat, and the lifting plate 1 is inserted into the fixing seat 4. The fixing seat 4 is provided with an upper opening, and a limiting assembly 5 for limiting the position of the lifting plate 1 is provided in the fixing seat 4, and the limiting assembly 5 includes a limiting block 51 slidably provided in the inner cavity of the fixing seat 4 and a second elastic member 52 that pushes the limiting block 51 to move. A weight reduction groove 41 communicating with the inner cavity of the fixing seat 4 is penetrated through one side wall of the fixing seat 4, and a guide groove 42 is provided on the inner wall of the fixing seat 4 away from the weight reduction groove 41, and the limiting member is provided in the guide groove 42 to slide and can be completely sunk into the guide groove 42. A guide bolt 53 is penetrated on the end surface of the fixing seat 4 away from the weight reduction groove 41, and the guide bolt 53 is inserted into the guide groove 42 and threadedly engaged with the limiting block 51. In this embodiment, the second elastic member 52 is a spring, which is sleeved on the guide bolt 53, one end of the second elastic member 52 abuts against the inner wall of the guide groove 42, and the other end of the second elastic member 52 abuts against the limit block 51, so as to push part of the limit block 51 out of the guide groove 42. The lifting plate 1 is provided with a limit groove 16 on the end surface close to the limit block 51, and the limit block 51 can be engaged in the limit groove 16 to prevent the lifting plate 1 from being separated from the fixing seat 4. The upper end of the fixing seat 4 is also fixedly mounted with a decorative pressing block 43, and the upper end of the decorative pressing block 43 is mounted with a lower decorative sheet 44, which is sleeved outside the lifting plate 1.

[0046] A guide slope 511 is also provided on the upper end surface of the limit block 51, and the guide slope 511 is inclined downward near the end of the lifting plate 1, so that when the lower end of the lifting plate 1 contacts the guide slope 511, the limit block 51 can be pushed into the guide groove 42, thereby making it easier to connect the limit block 51 with the limit groove 16.

[0047] A reset member 54 is also integrally formed on the end of the limit block 51 away from the guide bolt 53, and the reset member 54 extends out of the fixed seat 4 on the end away from the limit block 51. A avoidance groove 17 connected to the limit groove 16 is provided on the side wall of the lifting plate 1 away from the guide groove 42. The avoidance groove 17 penetrates the lower end surface of the lifting plate 1, so that the reset member 54 will not affect the connection between the lifting plate 1 and the fixed seat 4, and can also directly apply force to the limit block 51 through the reset member 54, so that the limit block 51 is disengaged from the limit groove 16, so that the lifting plate 1 can be disengaged from the fixed seat 4.

[0048] The implementation principle of this embodiment is as follows: directly insert the lower end of the lifting plate 1 into the fixed seat 4, then move downward to retract the limit block 51 into the guide groove 42 and continue to move downward until it abuts against the bottom surface of the inner cavity of the fixed seat 4, and the limit block 51 is inserted into the limit groove 16 under the push of the second elastic member 52 to achieve the connection between the fixed seat 4 and the lifting plate 1. When adjusting the position of the headrest, press the headrest downward so that the limit portion 322 is disengaged from the locking portion 311 along the inclined surface of the locking portion 311 and the limit portion 322 is clamped into the next locking portion 311 by the elastic force applied by the first elastic member 33. When the locking portion 311 moves to the bottom, it enters the reset portion 312. The sliding portion 321 is in a vertical state under the push of the reset portion 312 and moves upward relative to the lifting cover 2 until the first anti-slip block is clamped with the anti-slip groove 324, and the headrest is moved upward until the limit portion 322 abuts against the push portion 313 and enters the topmost locking portion 311.

[0049] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A seat headrest lifting mechanism, characterized in that: The invention comprises a lifting plate (1) connected to a seat, a lifting cover (2) connected to a headrest, and an adjustment component for limiting the movement of the lifting cover (2), the adjustment component comprising a limiting region (31), a locking member (32) for hooking on the limiting region (31), and a first elastic member (33) for pushing the locking member (32) to maintain contact with the limiting region (31), the limiting region (31) comprising a plurality of locking portions (311) arranged along the length direction of the lifting plate (1), the locking member (32) contacting the locking portion (311) to limit the vertical movement of the lifting rod; The limiting area (31) is arranged on the lifting plate (1) and the locking member (32) is arranged on the lifting cover (2), or the limiting area (31) is arranged on the lifting cover (2) and the locking member (32) is arranged on the lifting plate (1).

2. A seat headrest lifting mechanism according to claim 1, characterized in that: The locking parts (311) along the length direction of the lifting plate (1) are connected to each other, the side wall of the locking part (311) close to one end of the lifting plate (1) is arranged horizontally, and the other end of the side wall of the locking part (311) close to one end of the locking piece (32) is inclined toward the direction of the adjacent locking part (311), and the locking piece (32) is arranged between the adjacent locking parts (311) to slide and can abut against the locking part (311).

3. A seat headrest lifting mechanism according to claim 2, characterized in that: A guide portion (11) for guiding the movement of the locking member (32) is arranged at the position where the locking member (32) is arranged; the guide portion (11) is arranged along the length direction of the lifting plate (1); a receiving portion (13) is arranged on a side of the guide portion (11) away from the first elastic member (33); the locking member (32) comprises a sliding portion (321) arranged to move in the guiding portion (11) and a limiting portion (322) for contacting the locking member (311); the sliding portion (32 1) vertically moves in the guide portion (11) and can rotate into the accommodating portion (13), the upper and lower ends of the sliding portion (321) can simultaneously abut against the side wall of the guide portion (11) close to the accommodating portion (13), and a reset portion (312) is also provided in the limiting area (31), and the reset portion (312) is provided at one end of the side wall of the locking portion (311) at the end, and the limiting portion (322) slides along the locking portion (311) and the reset portion (312).

4. A seat headrest lifting mechanism according to claim 3, characterized in that: A clearance groove (323) is arranged along the length direction of the lifting plate (1) on the side wall of the sliding portion (321) away from the accommodating portion (13); one end of the first elastic member (33) is arranged in the guide portion (11); and the other end of the first elastic member (33) is arranged in the clearance groove (323).

5. The seat headrest lifting mechanism according to claim 3, characterized in that: A pushing portion (313) is also provided in the limiting area (31), and the pushing portion (313) is provided at one end of the locking portion (311) arranged in a row and away from the reset portion (312); the side wall of the pushing portion (313) away from the reset portion (312) is inclined toward the locking portion (311), and the limiting portion (322) can abut against the inclined side wall of the pushing portion (313) to slide and move toward the locking portion (311).

6. The seat headrest lifting mechanism according to claim 3, characterized in that: A first anti-slip portion (14) is arranged at the upper end of the guide portion (11) away from the first elastic member (33); the lower end of the vertical side wall of the first anti-slip portion (14) is inclined toward the direction of the first elastic member (33); an anti-slip groove (324) is arranged at the upper end of the sliding portion (321); the first anti-slip portion (14) is clamped in the anti-slip groove (324) at the upper end of the vertically arranged guide portion (11); and the upper end of the inclined guide portion (11) can abut against the lower end of the first anti-slip portion (14).

7. The seat headrest lifting mechanism according to claim 3, characterized in that: A second anti-slip portion (15) is provided at a position of the lower end of the guide portion (11) away from the first elastic member (33); the second anti-slip portion (15) is provided below the accommodating portion (13); the second anti-slip portion (15) is provided in the shape of an arc; and the second anti-slip portion (15) can abut against the lower end of the sliding portion (321).

8. The seat headrest lifting mechanism according to claim 1, characterized in that: The lower end of the lifting plate (1) is detachably connected to a fixing seat (4), the fixing seat (4) being used to be fixed on a seat, the fixing seat (4) being provided with a limiting assembly (5) for limiting the movement of the lifting plate (1), the limiting assembly (5) comprising a limiting block (51) slidably arranged on the fixing seat (4) and a second elastic member (52) for pushing the limiting block (51) to move, a limiting groove (16) being provided on a side wall of the lifting plate (1), the lower end of the lifting plate (1) being inserted into the fixing seat (4), and the limiting block (51) being inserted into the limiting groove (16).

9. The seat headrest lifting mechanism according to claim 8, characterized in that: A reset member (54) is fixed to one end of the limit block (51) away from the second elastic member (52); the reset member (54) is inserted through the fixing seat (4) and extends outside the fixing seat (4); an avoidance groove (17) is provided at one end of the lifting plate (1) away from the second elastic member (52); the avoidance groove (17) penetrates the lower end surface of the lifting plate (1) and is connected to the limit groove (16); the reset member (54) is inserted into the avoidance groove (17) and the limit groove (16).

10. The seat headrest lifting mechanism according to claim 8, characterized in that: A guiding inclined surface (511) is provided at the upper end of the limiting block (51), and the end of the guiding inclined surface (511) away from the second elastic member (52) is inclined downward.

Images