Seat headrest adjusting structure

Abstract

The utility model relates to a kind of seat headrest adjusting structure, including backrest and headrest, the back of backrest is equipped with connecting seat, connecting seat includes assembly plate and cover plate, the back of assembly plate is equipped with two connecting strips;Two connecting strips between upper portion are equipped with clamping plate and baffle, baffle, clamping plate and assembly plate are enclosed to form the slot;The upper portion back of assembly plate is equipped with assembly block, and the socket is formed between assembly block and clamping plate, the back of assembly block is equipped with installation groove, and the elastic block of protruding installation groove is equipped in installation groove;The lower end of headrest plate layer is equipped with the plug-in board inserted into slot, and multiple gear grooves are vertically equipped on the inner surface of plug-in board, and multiple gear grooves can be respectively matched with elastic block to adjust the longitudinal position of headrest. In the above scheme, headrest and connecting seat are assembled using insert piece type structure, plug-in board is arranged at the lower end of headrest, slot is formed in connecting seat, and the design of slot and plug-in board simplifies the installation and adjustment process of headrest, with compact structure, easy to operate, and improved convenience.

Description

Technical Field

[0001] This utility model relates to the field of seat technology, and in particular to a seat headrest adjustment structure. Background Technology

[0002] Most existing chair headrests are one-piece and cannot be adjusted. However, some independent headrests are available, offering height adjustment and enhanced functionality. For example, Chinese utility model patent CN221690480U discloses a chair with an adjustable headrest, including an adjustable headrest structure, a mounting mechanism, and a backrest. The mounting mechanism includes a mounting bracket and mounting bolts. The adjustable headrest structure is mounted on the mounting bracket, which is detachably connected to the backrest via the mounting bolts. This utility model's adjustable headrest chair uses a detachable method to install the adjustable headrest structure on the backrest. This allows for easy disassembly and replacement when certain parts of the headrest are damaged, making it more convenient to use. Furthermore, the adjustable headrest structure can be installed in different backrests, offering better adaptability. It also allows for multi-angle adjustment of the headrest, making adjustment more convenient and improving the user experience.

[0003] In the above design, the headrest is positioned above the backrest, with a mounting mechanism located on the upper rear side of the backrest. This mechanism holds the vertical beam in the middle of the headrest, and the headrest's height is adjusted by moving the mounting mechanism up and down relative to the headrest's vertical beam. However, due to the limited length of the vertical beam, the fit between the mounting mechanism and the headrest's vertical beam is relatively short, resulting in insufficient support strength from the mounting mechanism. Consequently, the headrest tends to wobble when the user leans against it, affecting both user experience and product lifespan. Furthermore, connecting the headrest to the mounting mechanism requires disassembling the mechanism before assembly with the headrest's vertical beam, making assembly and disassembly inconvenient. Summary of the Invention

[0004] To address the aforementioned issues, the present invention aims to provide a seat headrest adjustment structure. A connecting seat is provided on the back of the backrest, and a plug plate is provided below the headrest for inserting the connecting seat. The headrest and the connecting seat are assembled using a plug-in structure, which facilitates easy assembly and disassembly, ensures high strength, and provides good headrest stability, thereby improving user experience and product lifespan.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A seat headrest adjustment structure includes a backrest and a headrest installed above the backrest. The headrest includes a headrest panel and a soft padding layer disposed on the front surface of the headrest panel; characterized in that:

[0007] The back of the backrest is fixedly provided with a connecting seat. The connecting seat includes an assembly plate fixedly connected to the backrest and a cover plate covering the back of the assembly plate. The back of the assembly plate has two opposing connecting strips protruding longitudinally.

[0008] A retaining plate and a stop bar are provided between the upper parts of the two connecting strips. The stop bar is located below the retaining plate, and the stop bar, retaining plate, and assembly plate enclose each other to form a slot. An assembly block is provided on the upper back of the assembly plate, which is offset from the retaining plate. The lower end of the assembly block and the upper end of the retaining plate form the insertion port of the slot. An assembly opening communicating with the insertion port is formed between the upper end of the cover plate and the assembly block. An installation groove is provided on the back of the assembly block, and an elastic block protruding from the installation groove is provided in the installation groove. The lower end of the headrest board layer is provided with an insert plate that can be inserted into the slot. Multiple positioning grooves are provided longitudinally on the inner surface of the insert plate. The multiple positioning grooves can cooperate with the elastic block to adjust the longitudinal position of the headrest.

[0009] In the above technical solution, a connecting seat is provided on the back of the backrest, and a slot is formed inside the connecting seat. An elastic block is set in the slot on the assembly block of the connecting seat. An insert plate is provided at the lower end of the headrest. The insert plate can be inserted into the slot along the insertion port. Multiple positioning slots are set on the insert plate. Through the cooperation of the elastic block and the positioning slots, the headrest can be adjusted in the longitudinal position to adapt to the needs of different users and improve comfort. Furthermore, the headrest and the connecting seat are assembled using an insert-type structure. The insert plate is located at the lower end of the headrest, and the slot is formed inside the connecting seat. The design of the slot and insert plate simplifies the installation and adjustment process of the headrest. The structure is compact, easy to operate, and improves convenience. Moreover, the relatively long length and width of the mating length between the insert plate and the connecting seat can effectively improve the assembly strength between the headrest and the connecting seat, ensuring that the headrest remains stable after adjustment, preventing the headrest from shifting or shaking, and improving the stability of the headrest and the user experience.

[0010] Preferably, the back of the insert plate is provided with a slot in the longitudinal direction, and the inner wall of the insert plate is provided with a guide strip that cooperates with the slot.

[0011] Preferably, a baffle is formed on the assembly plate below the assembly block, a baffle strip is connected to the lower back of the baffle, a first opening corresponding to the clamping plate is formed between the baffle and the assembly block, a second opening corresponding to the baffle is formed between the baffle strip and the clamping plate, and a third opening is provided at the lower part of the assembly plate.

[0012] Preferably, the upper part of the baffle is inclined inward, and the back side of the baffle is provided with longitudinal abutment ribs, thereby forming a sliding groove on both sides of the back side of the baffle; the two sides of the assembly block and the connecting strip form a guide groove corresponding to the sliding groove; the inner surface of the insert plate is provided with longitudinal protrusions on both sides of the insert strip, the lower part of the insert strip forms a first slider adapted to the sliding groove, the upper part of the insert strip forms a second slider adapted to the guide groove, and the second slider protrudes from the first slider so that the lower end of the second slider abuts against the upper end of the sliding groove.

[0013] Preferably, the side wall of the assembly block is provided with multiple first clamping strips that cooperate with the second slider, and the back of the card plate is provided with multiple second clamping strips that cooperate with the inner wall of the cover plate.

[0014] Preferably, the lower two sides of the insert plate are provided with mounting holes, and elastic limiting blocks are provided in the mounting holes. The lower end of the elastic limiting block is connected to the lower end of the mounting hole, and the upper end of the elastic limiting block extends out of the mounting hole.

[0015] Preferably, the connecting seat is tilted backward on the back of the backrest, and the two sides of the mounting groove are provided with first bolt seats on the assembly block, and the lower two sides of the assembly plate are provided with second bolt seats.

[0016] Preferably, the assembly plate is provided with multiple locking holes, and the inner wall of the cover plate is provided with multiple buckles that are connected to the multiple locking holes.

[0017] Preferably, the outer surface of the baffle is provided with a first reinforcing rib in the middle longitudinal direction.

[0018] Preferably, the headrest panel includes an arc-shaped front panel and a rear panel, with the insert plate formed at the lower end of the rear panel; the front surface of the rear panel has a first mating groove, which contains a plurality of bolt posts and a plurality of second reinforcing ribs, some of which are connected to the bolt posts; the rear surface of the rear panel has a second mating groove corresponding to the first mating groove, which contains a plurality of retainers and a plurality of third reinforcing ribs corresponding to the plurality of bolt posts and the plurality of second reinforcing ribs, respectively.

[0019] The present invention adopts the above technical solution and has the following technical effects:

[0020] A connecting seat is installed on the back of the backrest, with a slot formed inside. An elastic block is installed within the slot on the assembly block of the connecting seat. An insert plate is located at the lower end of the headrest, allowing it to be inserted into the slot. Multiple position slots are provided on the insert plate. The elastic block engages with these slots, allowing the headrest to be adjusted longitudinally to accommodate different user needs and improve comfort. Furthermore, the headrest and connecting seat are assembled using a plug-in structure. The insert plate is located at the lower end of the headrest, and the slot is formed within the connecting seat. This slot and insert plate design simplifies the installation and adjustment process of the headrest, resulting in a compact structure that is easy to operate and enhances convenience. The relatively long length and width of the mating area between the insert plate and the connecting seat effectively increase the assembly strength between the headrest and the connecting seat, ensuring the headrest remains stable after adjustment, preventing displacement or wobbling, and improving the stability and user experience of the headrest. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the assembly of the headrest and backrest.

[0022] Figure 2 A three-dimensional structural diagram of the headrest and connecting seat installation.

[0023] Figure 3 This is a schematic diagram showing the fit between the insert plate and the connector.

[0024] Figure 4 This is a schematic diagram showing the fit between the cover plate and the mounting plate.

[0025] Figure 5 This is a schematic diagram showing the arrangement of the clips on the cover plate.

[0026] Figure 6 This is a three-dimensional structural diagram of the assembly plate.

[0027] Figure 7 This is a three-dimensional structural diagram of the assembly plate from another perspective.

[0028] Figure 8 This is a schematic diagram of the three-dimensional structure of the elastic block.

[0029] Figure 9 A schematic diagram showing the installation of an insert plate on the back panel layer.

[0030] Figure 10 This is a schematic diagram showing the arrangement of the elastic limiting blocks on the insert plate.

[0031] Figure 11 This is a schematic diagram of the assembly of the headrest insert plate and the mounting plate slot.

[0032] Figure 12 This is a schematic diagram of the exploded structure of the headrest. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0034] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] like Figures 1-12 The illustrated seat headrest adjustment structure includes a backrest 1 and a headrest 2 installed above the backrest 1. The headrest 2 includes a headrest panel 16 and a soft padding layer 3 disposed on the front surface of the headrest panel 16. A connecting seat 4 is fixedly provided on the back of the backrest 1. The connecting seat 4 includes an assembly plate 5 fixedly connected to the backrest 1 and a cover plate 6 covering the back of the assembly plate 5. Two opposing connecting strips 7 are longitudinally protruding from the back of the assembly plate 5.

[0039] A retaining plate 8 and a stop bar 9 are provided between the upper parts of the two connecting strips 7. The stop bar 9 is located below the retaining plate 8. The stop bar 9, the retaining plate 8, and the assembly plate 5 enclose each other to form a slot 10. An assembly block 11 is provided on the upper back of the assembly plate 5, which is staggered from the retaining plate 8. The lower end of the assembly block 11 and the upper end of the retaining plate 8 form an insertion port 12 of the slot 10. An assembly opening 13 communicating with the insertion port 12 is formed between the upper end of the cover plate 6 and the assembly block 11. An installation groove 14 is provided on the back of the assembly block 11. An elastic block 15 protruding from the installation groove 14 is provided in the installation groove 14. The lower end of the headrest board layer 16 is provided with an insertion plate 17 that is inserted into the slot 10. Multiple positioning grooves 18 are provided longitudinally on the inner surface of the insertion plate 17. The multiple positioning grooves 18 can cooperate with the elastic block 15 to adjust the longitudinal position of the headrest 2.

[0040] In the above technical solution, a connecting seat is provided on the back of the backrest, and a slot is formed inside the connecting seat. An elastic block is set in the slot on the assembly block of the connecting seat. An insert plate is provided at the lower end of the headrest. The insert plate can be inserted into the slot along the insertion port. Multiple positioning slots are set on the insert plate. Through the cooperation of the elastic block and the positioning slots, the headrest can be adjusted in the longitudinal position to adapt to the needs of different users and improve comfort. Furthermore, the headrest and the connecting seat are assembled using an insert-type structure. The insert plate is located at the lower end of the headrest, and the slot is formed inside the connecting seat. The design of the slot and insert plate simplifies the installation and adjustment process of the headrest. The structure is compact, easy to operate, and improves convenience. Moreover, the relatively long length and width of the mating length between the insert plate and the connecting seat can effectively improve the assembly strength between the headrest and the connecting seat, ensuring that the headrest remains stable after adjustment, preventing the headrest from shifting or shaking, and improving the stability of the headrest and the user experience.

[0041] Furthermore, the back of the insert plate 17 is provided with a longitudinal slot 19, and the inner wall of the card plate 8 is provided with a guide strip 20 that cooperates with the slot 19. In this technical solution, the guide strip cooperates with the slot to guide and position the insert plate when it is inserted into the slot, so that the insert plate can quickly and neatly enter the slot, enhancing the connection stability between the insert plate and the card plate, preventing the insert plate from shaking or shifting during use, and improving the smoothness and accuracy of adjustment.

[0042] Furthermore, a baffle 21 is formed on the assembly plate 5 below the assembly block 11. A baffle strip 9 is connected to the lower back of the baffle 21. A first opening 22 corresponding to the retaining plate 8 is formed between the baffle 21 and the assembly block 11. A second opening 23 corresponding to the baffle 21 is formed between the baffle strip 9 and the retaining plate 8. A third opening 24 is provided at the lower part of the assembly plate 5. In this technical solution, the first, second, and third openings form a reasonable spatial layout, which does not affect the smooth movement of the insert plate in the slot, while reducing the structural weight of the assembly plate (connecting seat), reducing the load of the connecting seat on the backrest, improving the assembly stability of the connecting seat, and reducing costs.

[0043] Furthermore, the upper part of the baffle 21 is inclined inward, and the back sides of the baffle 21 are longitudinally provided with abutment ribs 25, thereby forming sliding grooves 26 on both sides of the back of the baffle 21; the two sides of the assembly block 11 and the connecting strip 7 form guide grooves 27 corresponding to the sliding grooves 26; the inner surface of the insert plate 17 is longitudinally provided with insert strips 28 on both sides, the lower part of the insert strip 28 forms a first slider 29 adapted to the sliding groove 26, and the upper part of the insert strip 28 forms a second slider 30 adapted to the guide groove 27. The second slider 30 protrudes from the first slider 29 so that the lower end of the second slider 30 abuts against the upper end of the sliding groove 26. In this technical solution, based on the cooperation between the guide strip and the slot, the cooperation between the guide groove and the second slider, and the sliding groove and the first slider, further play a guiding and positioning role, so that the front side of the insert plate can be quickly assembled into the slot, ensuring the stability of the insert plate in vertical movement and preventing left and right wobbling. In addition, based on the limiting effect of the baffle on the bottom of the insert plate, the second slider abuts against the upper end of the slide groove, so that the front side of the insert plate further plays a limiting role, avoiding excessive insertion and enhancing safety. Furthermore, when the headrest is in the lowest position, it improves the support effect of the assembly plate on the insert plate.

[0044] Furthermore, the side wall of the assembly block 11 is provided with multiple first clamping strips 31 that cooperate with the second slider 30, and the back of the clamping plate 8 is provided with multiple second clamping strips 32 that cooperate with the inner wall of the cover plate 6. In this technical solution, the cooperation between the first clamping strips and the second slider increases the friction between the front insert strip of the insert plate and the assembly block, improving the stability of the insert plate and making the headrest more secure after adjustment. The cooperation between the second clamping strips and the inner wall of the cover plate ensures a tight connection between the cover plate and the assembly plate, preventing the cover plate from loosening and improving the overall structural stability. In addition, the second clamping strips can improve the structural strength of the clamping plate and enhance the stability of the clamping plate in positioning the insert plate.

[0045] Furthermore, mounting holes 33 are provided on both sides of the lower part of the insert plate 17. An elastic limiting block 34 is provided within the mounting hole 33, with its lower end connected to the lower end of the mounting hole 33 and its upper end extending out of the mounting hole 33. In this technical solution, the elastic limiting block acts as a limit at the lower part of the insert plate, preventing the insert plate from accidentally dislodging from the slot during headrest adjustment. To remove the insert plate, open the cover, press the elastic limiting block, and pull the insert plate upwards.

[0046] Furthermore, the connecting seat 4 is inclined backward on the back of the backrest 1, and the two sides of the mounting groove 14 are provided with first bolt seats 35 on the assembly block 11, and the lower two sides of the assembly plate 5 are provided with second bolt seats 36. In this technical solution, the first bolt seats and the second bolt seats provide multiple fixing points to ensure that the connecting seat is firmly installed on the backrest, distribute the force, and improve the stability and load-bearing capacity of the overall structure.

[0047] Furthermore, the assembly plate 5 is provided with multiple locking holes 37, and the inner wall of the cover plate 6 is provided with multiple buckles 38 that are correspondingly connected to the multiple locking holes 37. In this technical solution, the buckle-to-lock connection simplifies the installation and disassembly process of the cover plate, allowing for quick assembly without tools, facilitating maintenance, cleaning, or replacement of parts, and reducing production costs.

[0048] Furthermore, a first reinforcing rib 39 is longitudinally provided in the middle of the outer surface of the baffle 21. In this technical solution, the first reinforcing rib is longitudinally arranged on the outer surface of the baffle, which significantly enhances the baffle's resistance to bending and deformation, and extends the service life of the connecting seat.

[0049] Furthermore, the headrest panel 16 includes an arc-shaped front panel 40 and a rear panel 41, with the insert plate 17 formed at the lower end of the rear panel 41. A first mating groove 42 is formed on the front surface of the rear panel 41, within which multiple bolt posts 43 and multiple second reinforcing ribs 44 are provided, with some of the second reinforcing ribs 44 connected to the bolt posts 43. A second mating groove 45, corresponding to the first mating groove 42, is formed on the rear surface of the rear panel 41, within which multiple retaining seats 46 and multiple third reinforcing ribs 47, respectively corresponding to the bolt posts 43 and the second reinforcing ribs 44, are provided. In this technical solution, the headrest panel is divided into a front panel and a rear panel. The bolt posts and retaining seats in the first and second mating grooves cooperate to enhance the structural rigidity of the headrest panel, preventing cracking or deformation, making the basic structure of the headrest more robust and reliable. The second and third reinforcing ribs optimize stress distribution, improving the durability and safety of the headrest.

[0050] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0051] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A seat headrest adjustment structure, comprising a backrest (1) and a headrest (2) mounted above the backrest (1), the headrest (2) comprising a headrest panel (16) and a soft cushion layer (3) disposed on the front surface of the headrest panel (16); characterized in that: The backrest (1) is fixedly provided with a connecting seat (4). The connecting seat (4) includes an assembly plate (5) fixedly connected to the backrest (1) and a cover plate (6) covering the back of the assembly plate (5). The back of the assembly plate (5) is provided with two opposing connecting strips (7) protruding longitudinally. A retaining plate (8) and a stop strip (9) are provided between the upper parts of the two connecting strips (7). The stop strip (9) is located below the retaining plate (8). The stop strip (9), the retaining plate (8), and the assembly plate (5) enclose each other to form a slot (10). The upper back of the assembly plate (5) has a protruding assembly block (11) that is misaligned with the retaining plate (8). The lower end of the assembly block (11) and the upper end of the retaining plate (8) form the insertion port (12) of the slot (10). The upper end of the cover plate (6) and the assembly block (11) are connected. An assembly port (13) is formed between the assembly block (11) and the insertion port (12); an installation groove (14) is provided on the back of the assembly block (11), and an elastic block (15) protruding from the installation groove (14) is provided in the installation groove (14); the lower end of the headrest board layer (16) is provided with an insertion plate (17) for inserting into the slot (10), and multiple positioning grooves (18) are provided longitudinally on the inner surface of the insertion plate (17). The multiple positioning grooves (18) can cooperate with the elastic block (15) respectively to adjust the longitudinal position of the headrest (2).

2. The seat headrest adjustment structure according to claim 1, characterized in that: The back of the insert plate (17) is provided with a slot (19) in the longitudinal direction, and the inner wall of the insert plate (8) is provided with a guide strip (20) that cooperates with the slot (19).

3. The seat headrest adjustment structure according to claim 2, characterized in that: A baffle (21) is formed on the assembly plate (5) below the assembly block (11). A baffle (9) is connected to the lower back of the baffle (21). A first opening (22) corresponding to the clamping plate (8) is formed between the baffle (21) and the assembly block (11). A second opening (23) corresponding to the baffle (21) is formed between the baffle (9) and the clamping plate (8). A third opening (24) is provided at the lower part of the assembly plate (5).

4. The seat headrest adjustment structure according to claim 3, characterized in that: The upper part of the baffle (21) is inclined inward, and the back side of the baffle (21) is provided with longitudinal abutment ribs (25) on both sides, so that the back side of the baffle (21) forms a sliding groove (26); the two sides of the assembly block (11) and the connecting strip (7) form a guide groove (27) corresponding to the sliding groove (26); the inner surface of the insert plate (17) is provided with insert strips (28) protruding longitudinally on both sides; the lower part of the insert strip (28) forms a first slider (29) adapted to the sliding groove (26); the upper part of the insert strip (28) forms a second slider (30) adapted to the guide groove (27); the second slider (30) protrudes from the first slider (29) so that the lower end of the second slider (30) abuts against the upper end of the sliding groove (26).

5. The seat headrest adjustment structure according to claim 4, characterized in that: The side wall of the assembly block (11) is provided with multiple first pressing strips (31) that cooperate with the second slider (30), and the back of the card plate (8) is provided with multiple second pressing strips (32) that cooperate with the inner wall of the cover plate (6).

6. The seat headrest adjustment structure according to claim 3, characterized in that: The lower two sides of the insert plate (17) are provided with mounting holes (33), and an elastic limiting block (34) is provided in the mounting hole (33). The lower end of the elastic limiting block (34) is connected to the lower end of the mounting hole (33), and the upper end of the elastic limiting block (34) extends out of the mounting hole (33).

7. The seat headrest adjustment structure according to claim 1, characterized in that: The connecting seat (4) is tilted backward and located on the back of the backrest (1). The mounting groove (14) has a first bolt seat (35) on both sides of the mounting block (11), and the mounting plate (5) has a second bolt seat (36) on both sides of the lower part.

8. The seat headrest adjustment structure according to claim 1, characterized in that: The assembly plate (5) is provided with multiple snap holes (37), and the inner wall of the cover plate (6) is provided with multiple buckles (38) that are connected to the multiple snap holes (37).

9. A seat headrest adjustment structure according to claim 3, characterized in that: The outer surface of the baffle (21) is provided with a first reinforcing rib (39) in the middle longitudinal direction.

10. A seat headrest adjustment structure according to claim 1, characterized in that: The headrest panel (16) includes an arc-shaped front panel (40) and a rear panel (41). The insert plate (17) is formed at the lower end of the rear panel (41). A first mating groove (42) is formed on the front surface of the rear panel (41). The first mating groove (42) is provided with a plurality of bolt posts (43) and a plurality of second reinforcing ribs (44). Some of the second reinforcing ribs (44) are connected to the bolt posts (43). A second mating groove (45) corresponding to the first mating groove (42) is formed on the rear surface of the rear panel (41). The second mating groove (45) is provided with a plurality of retainers (46) corresponding to the plurality of bolt posts (43) and the plurality of second reinforcing ribs (44) and a plurality of third reinforcing ribs (47).

Images