Headrest adjustment mechanism, seat, and vehicle having the same

Abstract

The present invention discloses a headrest adjustment mechanism, a seat and a vehicle having the same, wherein the headrest adjustment mechanism comprises: a guide sleeve, the guide sleeve is suitable for being arranged on the seat; a support rod, the support rod is inserted into the guide sleeve along the up-down direction, the guide sleeve and the support rod are positionally adjustable along the up-down direction, and a first locking structure is provided between the support rod and the guide sleeve; an upper base and a lower base, the upper base and the lower base are connected by a connecting rod, the upper base and the lower base are positionally adjustable along the front-back direction, and a second locking structure is provided between the upper base and the lower base; an unlocking structure, the unlocking structure is provided on the upper base and the support rod and cooperates with the first locking structure and the second locking structure to disengage the guide sleeve and the support rod and disengage the upper base and the lower base. According to the headrest adjustment mechanism of the present invention, the headrest can be adjusted in the front-back direction and the up-down direction, which reduces the complexity of operation, and the simple structure reduces the difficulty of assembly and reduces the assembly cost.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a headrest adjustment mechanism, a seat and a vehicle having the same. Background Art

[0002] In order to better meet the needs of passengers, a variety of headrest adjustment mechanisms have been developed on the market, which are mainly divided into two types: one is to install the front and rear adjustment mechanism in the headrest and the up and down adjustment mechanism on the backrest guide sleeve, which is inconvenient to operate and needs to be unlocked from two places; the other is to integrate the front and rear adjustment mechanism and the up and down adjustment mechanism in the central core of the headrest, which is complicated to assemble and has a high cost. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a headrest adjustment mechanism that can adjust the headrest in the front-to-back direction and the up-down direction, thereby reducing the operation complexity, assembly difficulty and assembly cost.

[0004] The present invention also provides a seat, comprising the above-mentioned headrest adjustment mechanism.

[0005] The present invention also provides a vehicle, comprising the above-mentioned seat.

[0006] According to an embodiment of the present invention, the headrest adjustment mechanism includes: a guide sleeve, which is suitable for being arranged on a seat; a support rod, which is passed through the guide sleeve along the up-down direction, the guide sleeve and the support rod are positionally adjustable along the up-down direction, and a first locking structure is provided between the support rod and the guide sleeve; an upper base and a lower base, the upper base and the lower base are connected by a connecting rod, the upper base and the lower base are positionally adjustable along the front-rear direction, and a second locking structure is provided between the upper base and the lower base; an unlocking structure, which is provided on the upper base and the support rod and cooperates with the first locking structure and the second locking structure to disengage the guide sleeve from the support rod and disengage the upper base from the lower base.

[0007] The headrest adjustment mechanism according to the embodiments of the present invention utilizes an unlocking structure that cooperates with a first locking structure and a second locking structure to release the guide sleeve from the support rod and engage the upper and lower bases. This allows for adjustment of the headrest in both the fore-aft and up-and-down directions, reducing operational complexity. The simple structure simplifies assembly and reduces assembly costs. Furthermore, the inclusion of a guide sleeve and support rod transforms the traditional two-member headrest adjustment mechanism into a single-member mechanism, increasing design freedom and making the headrest more recognizable.

[0008] In addition, the headrest adjustment mechanism according to the present invention may also have the following additional technical features:

[0009] In some embodiments, the guide sleeve has a plurality of sockets spaced apart in the up-down direction, the support rod is provided with an avoidance hole suitable for cooperating with the plurality of the sockets, the first locking structure includes: a locking pin, the locking pin is suitable for being inserted into the avoidance hole and one of the sockets, the unlocking structure is connected to the locking pin, and is used to drive the locking pin to disengage from the socket.

[0010] In some embodiments, the first locking structure further includes: a fixed bracket, the fixed bracket being arranged in the support rod, and the locking pin being movably arranged on the fixed bracket; a first elastic member, the first elastic member being arranged on the fixed bracket and connected to the locking pin for driving the locking pin to move toward the socket.

[0011] In some embodiments, the lower base has a plurality of locking grooves spaced apart along the front-to-back direction, and the second locking structure includes: a locking pressure head, which is rotatably arranged on the upper base, and one end of the locking pressure head has a hook that cooperates with the locking groove, and the unlocking structure cooperates with the locking pressure head to drive the locking pressure head to rotate so that the hook disengages from the locking groove.

[0012] In some embodiments, the second locking structure further includes: a second elastic member, the second elastic member is provided on the upper base and connected to the locking pressure head to drive the hook to cooperate with the locking groove.

[0013] In some embodiments, the unlocking structure includes: a sleeve, which can be movably provided on the upper base along the left and right directions; an unlocking push rod, which is connected to the sleeve and is used to push the sleeve to move, and the unlocking push rod cooperates with the locking pressure head; a rotating rod, which is rotatably provided in the support rod, one end of the rotating rod is inserted in the sleeve and is used to move synchronously with the sleeve, and the other end of the rotating rod is connected to the locking pin, and when the unlocking push rod pushes the sleeve to move, the guide sleeve and the support rod are released from cooperation, and the upper base and the lower base are released from cooperation.

[0014] In some embodiments, the lower surface of the unlocking push rod has a matching inclined surface that cooperates with the second locking structure, and the matching inclined surface is inclined upward along the moving direction of the unlocking push rod when the upper base and the lower base are released from cooperation.

[0015] In some embodiments, a reinforcing sheet metal is provided on the outside of the guide sleeve.

[0016] The present invention also provides a seat having the above embodiment.

[0017] According to an embodiment of the present invention, the seat is provided with the aforementioned headrest adjustment mechanism. By providing an unlocking structure that cooperates with the first and second locking structures to disengage the guide sleeve from the support rod and engage the upper and lower bases, the headrest can be adjusted in both the fore-aft and up-and-down directions. This reduces operational complexity, and the simple structure simplifies assembly and reduces assembly costs. Furthermore, by providing the guide sleeve and support rod, the headrest adjustment mechanism is changed from a traditional two-member mechanism to a single-member mechanism, thereby increasing design freedom and making the headrest more recognizable.

[0018] The present invention also provides a vehicle having the above embodiment.

[0019] According to an embodiment of the present invention, a vehicle equipped with the aforementioned seat is provided. By providing an unlocking structure that cooperates with a first locking structure and a second locking structure to disengage the guide sleeve from the support rod and bring the upper base into contact with the lower base, the headrest can be adjusted in the fore-aft and up-and-down directions. This reduces operational complexity, and the simple structure reduces assembly difficulty and assembly costs. Furthermore, by providing the guide sleeve and support rod, the headrest adjustment mechanism is changed from a traditional two-member mechanism to a single-member mechanism, thereby increasing design freedom and making the headrest more recognizable.

[0020] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0022] Figure 1 is an exploded view of a headrest adjustment mechanism according to an embodiment of the present invention;

[0023] Figure 2 is a three-dimensional diagram of the cooperation between the sleeve, the unlocking push rod and the upper base of the headrest adjustment mechanism according to an embodiment of the present invention;

[0024] Figure 3 is a three-dimensional diagram of the cooperation between the sleeve, the unlocking push rod, the upper base and the locking press head of the headrest adjustment mechanism according to an embodiment of the present invention;

[0025] Figure 4 is a three-dimensional diagram of the cooperation between the sleeve, the unlocking push rod, the upper base and the lower base of the headrest adjustment mechanism according to an embodiment of the present invention;

[0026] Figure 5is a three-dimensional diagram of the guide sleeve, support rod, rotating rod and reinforced sheet metal of the headrest adjustment mechanism according to an embodiment of the present invention;

[0027] Figure 6 is a perspective view of a headrest adjustment mechanism according to an embodiment of the present invention;

[0028] Figure 7 is a side view of the upper base and the lower base of the headrest adjustment mechanism according to an embodiment of the present invention, wherein the locking pressure head and the locking groove are engaged in the first gear position;

[0029] Figure 8 is a side view of the upper base and lower base of the headrest adjustment mechanism according to an embodiment of the present invention, wherein the locking pressure head and the locking groove are engaged in the second gear position;

[0030] Figure 9 is a side view of the upper base and lower base of the headrest adjustment mechanism according to an embodiment of the present invention, wherein the locking pressure head and the locking groove are engaged in the third gear;

[0031] Figure 10 is a side view of the upper base and lower base of the headrest adjustment mechanism according to an embodiment of the present invention, wherein the locking pressure head is disengaged from the locking groove;

[0032] Figure 11 is a schematic structural diagram of a headrest adjustment mechanism according to an embodiment of the present invention, wherein a locking pin cooperates with a socket;

[0033] Figure 12 is a schematic structural diagram of a headrest adjustment mechanism according to an embodiment of the present invention, wherein the locking pin is disengaged from the socket;

[0034] Figure 13 is a side view of a headrest adjustment mechanism according to an embodiment of the present invention, wherein the locking pin is engaged with the socket in a first position;

[0035] Figure 14 2 is a side view of a headrest adjustment mechanism according to an embodiment of the present invention, wherein the locking pin is engaged with the socket in the second gear position.

[0036] Reference numerals:

[0037] 100. Headrest adjustment mechanism;

[0038] 1. Guide sleeve; 11. Socket; 12. External reinforcement rib;

[0039] 2. Support rod;

[0040] 3. Upper base;

[0041] 4. Lower base; 41. Locking groove;

[0042] 5. Unlocking structure; 51. Sleeve; 52. Unlocking push rod; 521. Matching inclined surface; 53. Rotating rod;

[0043] 6. First locking structure; 61. Locking latch; 62. Fixing bracket; 63. First elastic member;

[0044] 7. Connecting rod; 71. Fastener;

[0045] 8. Second locking structure; 81. Locking pressure head; 811. Hook; 82. Second elastic member;

[0046] 9. Strengthen sheet metal. DETAILED DESCRIPTION

[0047] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0048] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0049] 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 the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0050] In the present invention, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0051] The headrest adjustment mechanism 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0052] like Figure 1 As shown, the headrest adjustment mechanism 100 according to an embodiment of the present invention includes a guide sleeve 1 , a support rod 2 , an upper base 3 , a lower base 4 and an unlocking structure 5 .

[0053] Specifically, refer to the attached Figure 5 As shown, the guide sleeve 1 is suitable for being arranged on the seat, and the support rod 2 is used to support other components of the headrest adjustment mechanism 100 and fix the headrest adjustment mechanism 100 on the seat. The support rod 2 is passed through the guide sleeve 1 along the up and down directions. The positions of the guide sleeve 1 and the support rod 2 are adjustable along the up and down directions. There is a first locking structure 6 between the support rod 2 and the guide sleeve 1, which can change the headrest adjustment mechanism 100 from the traditional two-rod type to a single-rod type, thereby improving the design freedom of the headrest and making the headrest more recognizable.

[0054] Optionally, the inner circumferential wall of the guide sleeve 1 is provided with a plurality of internal reinforcing ribs spaced apart along the circumferential direction of the guide sleeve 1, which can reduce the contact area between the guide sleeve 1 and the support rod 2, reduce the friction generated by the relative movement between the guide sleeve 1 and the support rod 2, and facilitate the relative movement between the guide sleeve 1 and the support rod 2.

[0055] Further, refer to the attached Figure 4 and attached Figure 7 As shown, the upper base 3 and the lower base 4 are used to fix other components of the headrest adjustment mechanism 100. The upper base 3 and the lower base 4 are connected by a connecting rod 7. The ends of the connecting rod 7 in the upper and lower directions are fixed to the upper base 3 and the lower base 4 respectively by fasteners 71. The upper base 3 and the lower base 4 are adjustable in position along the front-back direction. There is a second locking structure 8 between the upper base 3 and the lower base 4. Optionally, the fastener 71 can be a rivet, a screw, or other fasteners 71, which are not limited here. In a specific example, refer to the attached Figure 1 As shown, the connecting rod 7 can be deformed appropriately as needed to avoid other components and reduce the possibility of friction.

[0056] Preferably, the upper base 3 and the lower base 4 are metal parts with high strength, which can improve the safety performance of the headrest adjustment mechanism 100.

[0057] Further, see the attached Figure 6 As shown, the unlocking structure 5 is provided on the upper base 3 and the support rod 2 and cooperates with the first locking structure 6 and the second locking structure 8 to release the cooperation between the guide sleeve 1 and the support rod 2 and the upper base 3 and the lower base 4, thereby enabling the headrest to be adjustable in the front-back direction and the up-down direction, reducing the complexity of the operation. Moreover, the simple structure reduces the difficulty of assembly and reduces the assembly cost.

[0058] According to the headrest adjustment mechanism 100 of the embodiment of the present invention, the unlocking structure 5 cooperates with the first locking structure 6 and the second locking structure 8 to disengage the guide sleeve 1 from the support rod 2 and engage the upper base 3 with the lower base 4. This allows the headrest to be adjusted in both the fore-aft and up-and-down directions, reducing operational complexity. The simple structure simplifies assembly and reduces assembly costs. Furthermore, by providing the guide sleeve 1 and support rod 2, the headrest adjustment mechanism 100 is transformed from a traditional two-member mechanism to a single-member mechanism, increasing design freedom and making the headrest more recognizable.

[0059] In some embodiments of the present invention, Figure 13 and attached Figure 14 As shown, the guide sleeve 1 has a plurality of insertion holes 11 spaced apart in the vertical direction, the support rod 2 is provided with avoidance holes suitable for cooperating with the plurality of insertion holes 11, and the first locking structure 6 includes a locking pin 61, which is suitable for being inserted into the avoidance holes and one of the insertion holes 11 to fix the headrest adjustment mechanism 100 in the vertical direction. Figure 11 and attached Figure 12 As shown, the unlocking structure 5 is connected to the locking pin 61 and is used to drive the locking pin 61 to disengage from the socket 11, so that the headrest can be adjusted in the vertical direction. For example, the sockets 11 can be two, four, five, six, eight or ten in the vertical direction on the guide sleeve 1. In a specific example, refer to the attached Figure 13 As shown, the guide sleeve 1 has five insertion holes 11 spaced apart in the vertical direction. The locking pin 61 cooperates with one of the five insertion holes 11 to achieve adjustment of five gears.

[0060] In a further embodiment of the present invention, referring to the attached Figure 1 As shown, the first locking structure 6 further includes a fixing bracket 62 and a first elastic member 63. Figure 11 and attached Figure 12As shown, a fixing bracket 62 is disposed within the support rod 2, a locking latch 61 is movably disposed on the fixing bracket 62, and a first elastic member 63 is disposed on the fixing bracket 62 and connected to the locking latch 61 for driving the locking latch 61 to move toward the insertion hole 11. It is understood that when the locking latch 61 moves in a direction away from the fixing bracket 62, the first elastic member 63 utilizes its resilience to drive the locking latch 61 toward the fixing bracket 62, thereby achieving vertical adjustment when the guide sleeve 1 is released from the support rod 2, and automatically restoring the fit between the guide sleeve 1 and the support rod 2 after the adjustment is completed.

[0061] In a further embodiment of the present invention, referring to the attached Figure 4 As shown, the lower base 4 has a plurality of locking grooves 41 spaced apart in the front-to-back direction, and the second locking structure 8 includes a locking pressure head 81, which is rotatably arranged on the upper base 3, and one end of the locking pressure head 81 has a hook 811 that cooperates with the locking groove 41 to fix the headrest adjustment mechanism 100 in the front-to-back direction. Figure 7 -Attached Figure 10 As shown, the unlocking structure 5 cooperates with the locking pressure head 81 to drive the locking pressure head 81 to rotate so that the hook 811 is disengaged from the locking groove 41, thereby achieving the headrest adjustable in the front-to-back direction. For example, the locking grooves 41 can be two, three, four or five spaced apart in the front-to-back direction on the lower base 4. In a specific example, refer to the attached Figure 7 As shown, the lower base 4 has five locking grooves 41 spaced apart in the front-to-back direction. The hook 811 cooperates with one of the five locking grooves 41 to achieve adjustment of five gears.

[0062] In a further embodiment of the present invention, referring to the attached Figure 1 As shown, the second locking structure 8 further includes a second elastic member 82, which is provided on the upper base 3 and connected to the locking pressure head 81 to drive the hook 811 to engage with the locking groove 41. It is understandable that when the hook 811 moves in a direction away from the locking groove 41, the second elastic member 82 utilizes its resilience to drive the hook 811 to move in a direction toward the locking groove 41, thereby achieving front-to-back adjustment when the upper base 3 and the lower base 4 are disengaged, and automatically restoring the engagement of the upper base 3 and the lower base 4 after the adjustment is completed.

[0063] In a further embodiment of the present invention, referring to the attached Figure 1 As shown, the unlocking structure 5 includes a sleeve 51, an unlocking push rod 52 and a rotating rod 53. Figure 2 As shown, the sleeve 51 is movably arranged on the upper base 3 along the left and right directions, and the unlocking push rod 52 is connected to the sleeve 51 and is used to push the sleeve 51 to move. Figure 3 and attached Figure 4 As shown, the unlocking push rod 52 cooperates with the locking pressure head 81 to drive the locking pressure head 81 to rotate so that the hook 811 is disengaged from the locking groove 41. Figure 11 and attached Figure 12 As shown, a rotating rod 53 is rotatably disposed within the support rod 2. One end of the rotating rod 53 is inserted into the sleeve 51 for synchronous movement with the sleeve 51. The other end of the rotating rod 53 is connected to the locking latch 61 for driving the locking latch 61 out of the insertion hole 11. When the unlocking push rod 52 pushes the sleeve 51 to move, the guide sleeve 1 and the support rod 2 are disengaged, and the upper base 3 and the lower base 4 are disengaged, thereby achieving adjustable headrest in the vertical direction and the front-back direction.

[0064] In a further embodiment of the present invention, referring to the attached Figure 11 As shown, the lower surface of the unlocking push rod 52 has a matching bevel 521 that engages with the second locking structure 8. When the upper base 3 and the lower base 4 are disengaged, the matching bevel 521 tilts upward along the movement direction of the unlocking push rod 52. It will be understood that when the unlocking push rod 52 moves toward the sleeve 51, the matching bevel 521 drives the end of the locking pressure head 81 away from the hook 811 to rotate downward, thereby causing the hook 811 to rotate upward and disengage from the locking groove 41, thereby achieving front-to-back adjustment of the headrest.

[0065] In some embodiments of the present invention, Figure 5 As shown, a reinforcing sheet metal 9 is provided on the outside of the guide sleeve 1. The reinforcing sheet metal 9 is provided on the seat together with the guide sleeve 1, which can strengthen the guide sleeve 1 and the support rod 2 and improve the structural strength of the headrest adjustment mechanism 100.

[0066] Optional, see attached Figure 1 As shown, the outer peripheral wall of the guide sleeve 1 is provided with a plurality of outer reinforcing ribs 12 spaced apart along the circumferential direction of the guide sleeve 1 , which can reduce the contact area between the guide sleeve 1 and the reinforcing sheet metal 9 and facilitate the assembly of the reinforcing sheet metal 9 and the guide sleeve 1 .

[0067] The present invention also provides a seat having the headrest adjustment mechanism 100 according to the above embodiment.

[0068] According to an embodiment of the present invention, the seat is provided with the aforementioned headrest adjustment mechanism 100. By providing an unlocking structure 5 that cooperates with the first locking structure 6 and the second locking structure 8 to disengage the guide sleeve 1 from the support rod 2 and engage the upper base 3 with the lower base 4, the headrest can be adjusted in both the fore-aft and up-and-down directions. This reduces operational complexity, and the simple structure simplifies assembly difficulty and reduces assembly costs. Furthermore, by providing the guide sleeve 1 and the support rod 2, the headrest adjustment mechanism 100 is changed from a traditional two-member structure to a single-member structure, thereby increasing design freedom and making the headrest more recognizable.

[0069] The present invention also provides a vehicle having the seat according to the above embodiment.

[0070] According to an embodiment of the present invention, the vehicle, equipped with the aforementioned seat, utilizes an unlocking structure 5 that cooperates with a first locking structure 6 and a second locking structure 8 to disengage the guide sleeve 1 from the support rod 2 and engage the upper base 3 with the lower base 4. This allows for adjustment of the headrest in both the fore-aft and up-and-down directions, reducing operational complexity. The simple structure reduces assembly difficulty and assembly costs. Furthermore, by providing the guide sleeve 1 and support rod 2, the headrest adjustment mechanism 100 is changed from a traditional two-member mechanism to a single-member mechanism, thereby increasing design freedom and making the headrest more recognizable.

[0071] The headrest adjustment mechanism 100 , the seat, and other components and operations of the vehicle according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail here.

[0072] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0073] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A headrest adjustment mechanism, characterized in that: include: A guide sleeve (1), wherein the guide sleeve (1) is suitable for being arranged on a seat; A support rod (2), the support rod (2) is inserted into the guide sleeve (1) in the vertical direction, the guide sleeve (1) and the support rod (2) are adjustable in the vertical direction, and a first locking structure (6) is provided between the support rod (2) and the guide sleeve (1); An upper base (3) and a lower base (4), wherein the upper base (3) and the lower base (4) are connected via a connecting rod (7), the positions of the upper base (3) and the lower base (4) are adjustable along the front-back direction, and a second locking structure (8) is provided between the upper base (3) and the lower base (4); an unlocking structure (5), the unlocking structure (5) being provided on the upper base (3) and the support rod (2) and cooperating with the first locking structure (6) and the second locking structure (8) to release the cooperation between the guide sleeve (1) and the support rod (2) and to release the cooperation between the upper base (3) and the lower base (4); The guide sleeve (1) is provided with a plurality of insertion holes (11) spaced apart in the vertical direction, the support rod (2) is provided with a relief hole suitable for cooperating with the plurality of insertion holes (11), and the first locking structure (6) comprises: A locking latch (61), wherein the locking latch (61) is adapted to be inserted into the avoidance hole and one of the insertion holes (11); the unlocking structure (5) is connected to the locking latch (61) and is used to drive the locking latch (61) to disengage from the insertion hole (11); The first locking structure (6) further comprises: A fixed bracket (62), the fixed bracket (62) is arranged in the support rod (2), and the locking pin (61) is movably arranged on the fixed bracket (62); a first elastic member (63), the first elastic member (63) being provided on the fixing bracket (62) and connected to the locking latch (61) for driving the locking latch (61) to move toward the insertion hole (11); The lower base (4) has a plurality of locking grooves (41) spaced apart in the front-to-back direction, and the second locking structure (8) includes: A locking pressure head (81), the locking pressure head (81) is rotatably arranged on the upper base (3), one end of the locking pressure head (81) has a hook (811) that cooperates with the locking groove (41), and the unlocking structure (5) cooperates with the locking pressure head (81) and is used to drive the locking pressure head (81) to rotate so that the hook (811) is disengaged from the locking groove (41); The unlocking structure (5) comprises: a sleeve (51), the sleeve (51) being movably arranged on the upper base (3) in a left-right direction; an unlocking push rod (52), the unlocking push rod (52) being connected to the sleeve (51) and being used to push the sleeve (51) to move, the unlocking push rod (52) cooperating with the locking pressure head (81); A rotating rod (53) is rotatably arranged in the support rod (2), one end of the rotating rod (53) is inserted in the sleeve (51) for synchronous movement with the sleeve (51), and the other end of the rotating rod (53) is connected to the locking pin (61). When the unlocking push rod (52) pushes the sleeve (51) to move, the guide sleeve (1) and the support rod (2) are released from engagement, and the upper base (3) and the lower base (4) are released from engagement.

2. The headrest adjustment mechanism according to claim 1, characterized in that: The second locking structure (8) further comprises: A second elastic member (82) is provided on the upper base (3) and is connected to the locking pressure head (81) to drive the hook (811) to cooperate with the locking groove (41).

3. The headrest adjustment mechanism according to claim 1, characterized in that: The lower surface of the unlocking push rod (52) has a matching bevel (521) that matches the second locking structure (8), and when the upper base (3) and the lower base (4) are released from matching, the matching bevel (521) is inclined upward along the moving direction of the unlocking push rod (52).

4. The headrest adjustment mechanism according to claim 1, characterized in that: The guide sleeve (1) is provided with a reinforcement sheet metal (9) on the outside.

5. A seat, characterized in that: The invention comprises a headrest adjustment mechanism (100) according to any one of claims 1 to 4.

6. A vehicle, characterized in that: Comprising a seat according to claim 5.

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