Adjustable headrest, seat and vehicle

Abstract

The utility model discloses an adjustable headrest, a seat and a vehicle, and relates to the technical field of vehicle seats. The adjustable headrest comprises a headrest front cover, a headrest base, a sliding mechanism and side wing plates. The headrest front cover is connected with the headrest base to form a cavity, the sliding mechanism is arranged in the cavity, and the sliding mechanism is connected with the headrest base; the sliding mechanism slides in the length direction of the adjustable headrest so as to drive the connected side wing plates to slide in the same direction as the sliding mechanism. The position width in the scene can be adjusted, the lateral supporting performance of the vehicle headrest on the head of a user is improved, and the use experience of the user is improved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle seats, and in particular to an adjustable headrest, a seat and a vehicle. Background Art

[0002] At present, with the development of the times, the frequency of vehicle use is getting higher and higher. The use of vehicles is no longer limited to simple means of transportation. Users' requirements for vehicles are also getting higher and higher, and vehicles need to provide more comfortable experience.

[0003] The vehicle headrest is a driving and riding comfort configuration product. In the existing vehicle headrests, only the side wing components can be folded. In order to prevent the headrest from being too large and affecting the field of vision, the width of the folding position is set to be small. In order to avoid the side wings from being clamped after folding, the folding angle of the side wings is also small, resulting in poor lateral support for the user's head by the vehicle headrest.

[0004] Existing adjustable headrests are mainly headrests that move in the up-down and front-back directions. However, the adjustable headrests that move in the up-down and front-back directions cannot solve the technical problem that the vehicle headrest has poor lateral support for the user's head. Utility Model Content

[0005] Based on this, it is necessary to provide an adjustable headrest, seat and vehicle to address at least one of the technical problems mentioned in the above background technology, which can adjust the width of the mid-scene position, enhance the lateral support of the vehicle headrest for the user's head, and enhance the user experience.

[0006] The specific technical solutions provided by the embodiments of this application are as follows:

[0007] In a first aspect, an adjustable headrest is provided, comprising:

[0008] Headrest front cover, headrest base, sliding mechanism and side wing panels;

[0009] The headrest front cover is connected to the headrest base to form a cavity, the sliding mechanism is arranged in the cavity, and the sliding mechanism is connected to the headrest base;

[0010] The sliding mechanism slides along the length direction of the adjustable headrest to drive the connected side wing panels to slide along the same direction as the sliding mechanism.

[0011] Furthermore, the adjustable headrest also includes a flip mechanism, one end of the flip mechanism is connected to the sliding mechanism, and the other end of the flip mechanism is connected to the side wing panel;

[0012] The side wing panel is flipped toward a direction away from the headrest base or toward a direction close to the headrest base by the flipping mechanism.

[0013] Further, the sliding mechanism includes a first guide rail, a second guide rail and a slider assembly, and the first guide rail and the second guide rail are arranged on the headrest base;

[0014] The slider assembly is slidably connected to the first guide rail and the second guide rail at the same time, and the slider assembly is connected to the flip mechanism.

[0015] Furthermore, the slider assembly includes a slider body and a locking pin. The slider body is provided with a receiving groove for receiving the locking pin, and the locking pin is simultaneously engaged with the first guide rail and the second guide rail.

[0016] Furthermore, the first guide rail is provided with at least one first clamping groove and at least one second clamping groove, and the second guide rail is also provided with at least one first clamping groove and at least one second clamping groove;

[0017] The locking pin is engaged with the first engaging groove on the first guide rail and the second guide rail at the same time, or the locking pin is engaged with the second engaging groove on the first guide rail and the second guide rail at the same time.

[0018] Furthermore, the slider assembly also includes a spring, one end of the spring is connected to the slider body, and the other end of the spring is connected to the lock pin;

[0019] The first clamping slot and the second clamping slot are configured as trapezoidal clamping slots.

[0020] Furthermore, the first clamping slot and the second clamping slot are arranged in mirror symmetry.

[0021] Further, the sliding mechanism comprises a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod, the number of the side wing panels is two, the two side wing panels are arranged on both sides of the sliding mechanism, one side wing panel is movably hinged to the first connecting rod and the second connecting rod at the same time, and the other side wing panel is movably hinged to the third connecting rod and the fourth connecting rod at the same time;

[0022] The first connecting rod is movably hinged to the third connecting rod, and the second connecting rod is movably hinged to the fourth connecting rod.

[0023] Furthermore, the flipping mechanism includes a first connecting part and a second connecting part, the first connecting part is connected to the sliding mechanism, the second connecting part is connected to the side wing panel, and the first connecting part and the second connecting part are movably hinged.

[0024] In a second aspect, a seat is provided, the seat comprising an adjustable headrest having the following structure:

[0025] Headrest front cover, headrest base, flip mechanism, sliding mechanism and side wing panels;

[0026] The headrest front cover is connected to the headrest base to form a cavity, the sliding mechanism is arranged in the cavity, the sliding mechanism is connected to the headrest base, one end of the flip mechanism is connected to the sliding mechanism, and the other end of the flip mechanism is connected to the side wing plate;

[0027] The sliding mechanism slides along the length direction of the adjustable headrest to drive the connected side wing panels to slide along the same direction;

[0028] The side wing panel is flipped toward a direction away from the headrest base or toward a direction close to the headrest base by the flipping mechanism.

[0029] According to a third aspect, a vehicle is provided, comprising the above-mentioned seat.

[0030] The embodiments of the present application have the following beneficial effects:

[0031] The embodiments of the present application provide an adjustable headrest, a seat, and a vehicle. When a user needs to adjust the flip angle of the adjustable headrest, by manually flipping the side wing panels on one or both sides of the adjustable headrest, the side wing panels can be driven to flip through the connected flipping mechanism to form a certain angle with the headrest base, so as to facilitate the user to adjust the head to a suitable position for support. When the user needs to adjust the width of the middle part of the headrest, the side wing panels can be pulled outward along the length direction of the adjustable headrest, which can drive the sliding mechanism to slide outward along the length direction of the adjustable headrest, thereby facilitating the user to widen the middle width of the adjustable headrest, and can increase the width of the middle position of the headrest, thereby improving the support for the user's head, increasing the user's comfort, and improving the user's experience. Similarly, when the user needs to retract the headrest, the user only needs to push the side wing panel inward along the length direction of the adjustable headrest, which can drive the sliding mechanism to slide inward along the length direction of the adjustable headrest, so that the user can adjust the middle width of the adjustable headrest to reduce the adjustable headrest so as to retract the adjustable headrest. Moreover, since the structure is arranged inside the seat headrest, it is convenient to use and does not take up extra space. It can be flexibly adapted to various scenarios such as user resting scenes and driving scenes, and is highly practical and adaptable. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 A schematic diagram showing the structure of an adjustable headrest provided in an embodiment of the present application is shown;

[0034] Figure 2 A schematic diagram showing the internal structure of an adjustable headrest according to an embodiment of the present application;

[0035] Figure 3 A schematic diagram of an exploded structure of an adjustable headrest according to an embodiment of the present application is shown;

[0036] Figure 4 A schematic diagram showing an exploded structure of a sliding mechanism of an adjustable headrest according to an embodiment of the present application;

[0037] Figure numerals: 1. headrest front cover; 2. headrest base; 3. flip mechanism; 31. first connecting part; 32. second connecting part; 4. sliding mechanism; 41. first guide rail; 42. second guide rail; 43. slider assembly; 431. slider body; 4311. accommodating groove; 432. locking pin; 433. spring; 44. first snap-in groove; 45. second snap-in groove; 5. side wing panel. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0039] It should be understood that in the description of the present application, unless the context clearly requires otherwise, words such as "include", "comprises", and the like in the entire specification and claims should be interpreted as inclusive rather than exclusive or exhaustive; that is, the meaning of "including but not limited to".

[0040] It should also be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, "plurality" means two or more.

[0041] Embodiment 1

[0042] The present application provides an adjustable headrest, referring to Figure 1, including: a headrest front cover 1, a headrest base 2, a flip mechanism 3, a sliding mechanism 4 and a side wing plate 5. The headrest front cover 1 is connected to the headrest base 2 to form a cavity, the sliding mechanism 4 is arranged in the cavity, the sliding mechanism 4 is connected to the headrest base 2, one end of the flip mechanism 3 is connected to the sliding mechanism 4, and the other end of the flip mechanism 3 is connected to the side wing plate 5; the sliding mechanism 4 slides along the length direction of the adjustable headrest to drive the connected side wing plate 5 to slide in the same direction as the sliding mechanism; the side wing plate 5 is flipped away from the headrest base 2 or toward the headrest base 2 through the flip mechanism 3.

[0043] Specifically, the headrest base 2 can also be connected to a plug rod, and connected to the vehicle seat body through the plug rod. When the user needs to adjust the flip angle of the adjustable headrest, by manually flipping the side wing panels 5 on one or both sides of the adjustable headrest, the side wing panels 5 can be driven to flip through the connected flipping mechanism 3, and a certain angle can be formed with the headrest base 2, so as to facilitate the user to adjust to a suitable position to support the head. When the user needs to adjust the middle width of the headrest, pulling the side wing panels 5 outward along the length direction of the adjustable headrest can drive the sliding mechanism 4 to slide outward along the length direction of the adjustable headrest, so as to facilitate the user to widen the middle width of the adjustable headrest, and can increase the width of the middle position of the headrest, thereby improving the support for the user's head, increasing the user's comfort, and improving the user's experience. Similarly, when the user needs to retract the headrest, he only needs to push the side wing panel 5 inward along the length direction of the adjustable headrest, which can drive the sliding mechanism 4 to slide inward along the length direction of the adjustable headrest, so that the user can adjust the middle width of the adjustable headrest to reduce the adjustable headrest so as to retract the adjustable headrest. Moreover, since the structure is arranged inside the seat headrest, it is convenient to use and does not take up extra space. It can be flexibly adapted to various scenarios such as user resting scenes and driving scenes, and is highly practical and adaptable.

[0044] Exemplarily, it may include a set of sliding mechanisms 4, flipping mechanisms 3 and wing panels 5, or may include multiple sets of sliding mechanisms 4, flipping mechanisms 3 and wing panels 5. That is, it may realize flipping on one side and / or sliding on one side, or flipping on both sides and / or sliding on both sides. Taking flipping on one side as an example, one end of the flipping mechanism 3 is connected to the sliding mechanism 4, and the other end of the flipping mechanism 3 is connected to the wing panel 5; the sliding mechanism 4 slides along the length direction of the adjustable headrest to drive the connected wing panel 5 to slide in the same direction; the wing panel 5 flips away from the headrest base 2 or toward the headrest base 2 through the flipping mechanism 3. The user manually flips the flippable wing panel 5 on one side of the adjustable headrest, and the flipping mechanism 3 can drive the wing panel 5 to flip, so as to form a certain angle with the headrest base 2, so as to facilitate the user to adjust to a suitable position to support the head. Flipping on one side can reduce the impact on the field of vision to a certain extent. At this time, the middle width of the headrest can also be adjusted along the length direction of the adjustable headrest through the sliding mechanism 4 on the same side or both sides to flexibly widen or reduce the width of the middle position of the headrest, thereby improving the support for the user's head, increasing the user's comfort, and enhancing the user's experience.

[0045] For example, taking the realization of both-side flipping and both-side sliding as an example, a set of flipping mechanisms 3 and side wing panels 5 are arranged on both sides of the sliding mechanism 4, one end of the flipping mechanism 3 on each side of the sliding mechanism 4 is connected to the sliding mechanism 4, and the other end of the flipping mechanism 3 on each side is connected to the side wing panel 5 on that side; in this case, the sliding mechanism 4 may include two slider assemblies 43, and the two slider assemblies 43 are respectively connected to the flipping mechanism 3 on one side. The sliding directions of the two slider assemblies 43 can be the same or opposite, and accordingly, the movement directions of the side wing panels 5 on both sides can also be the same or opposite. The slider assembly 43 on the same side slides along the length direction of the adjustable headrest to drive the connected side wing panels 5 on the same side to slide in the same direction; at the same time, the side wing panels 5 on the same side can also flip away from the headrest base 2 or flip towards the headrest base 2 through the flipping mechanism 3. The sliding and flipping of the side wing panels 5 on one side can be realized at the same time, and the sliding and flipping of the side wing panels 5 on both sides can also be realized at the same time.

[0046] In some embodiments, reference Figure 2 as well as Figure 3 The sliding mechanism 4 includes a first guide rail 41, a second guide rail 42 and a slider assembly 43. The first guide rail 41 and the second guide rail 42 are arranged on the headrest base; the slider assembly 43 is slidably connected to the first guide rail 41 and the second guide rail 42 at the same time, and the slider assembly 43 is connected to the flip mechanism 3.

[0047] Exemplarily, taking the realization of both-side flipping and both-side sliding as an example, the slider assembly 43 can be arranged in two, and the two slider assemblies 43 are respectively arranged on both sides of the headrest base 2, and the two slider assemblies 43 are respectively connected to the flip mechanism 3 on one side. The sliding directions of the two slider assemblies 43 can be the same or opposite, and accordingly, the movement directions of the side wing panels 5 on both sides can also be the same or opposite. The slider assembly 43 on each side is slidably connected to the first guide rail 41 and the second guide rail 42 at the same time, and can slide on the first guide rail 41 and the second guide rail 42. The slider assembly 43 on the same side slides on the first guide rail 41 and the second guide rail 42 along the length direction of the adjustable headrest to drive the connected side wing panels 5 on the same side to slide in the same direction. By adopting such a structural form, through the arrangement of the first guide rail 41, the second guide rail 42 and the slider assembly 43, the freedom of the slider assembly 43 can be constrained, so that the slider assembly 43 slides more smoothly along the length direction of the adjustable headrest.

[0048] In some embodiments, reference Figure 4 The slider assembly 43 includes a slider body 431 and a locking pin 432 . The slider body 431 is provided with a receiving groove 4311 for receiving the locking pin 432 . The locking pin 432 is engaged with the first guide rail 41 and the second guide rail 42 at the same time.

[0049] In some embodiments, reference Figure 4 The first guide rail 41 is provided with at least one first engaging groove 44 and at least one second engaging groove 45, and the second guide rail 42 is also provided with at least one first engaging groove 44 and at least one second engaging groove 45. The locking pin 432 is engaged with the first engaging groove 44 on the first guide rail 41 and the second guide rail 42 at the same time, or the locking pin 432 is engaged with the second engaging groove 45 on the first guide rail 41 and the second guide rail 42 at the same time.

[0050] Specifically, a locking pin 432 is provided at the bottom of the slider assembly 43, and a receiving groove 4311 is provided on the slider body 431, and the locking pin 432 is disposed in the receiving groove 4311. The locking pin 432 is simultaneously engaged with the bottom of the first guide rail 41 and the second guide rail 42, and the locking pin 432 can be simultaneously engaged with the first engaging groove 44 on the first guide rail 41 and the second guide rail 42, and the locking pin 432 can also be simultaneously engaged with the second engaging groove 45 on the first guide rail 41 and the second guide rail 42. For example, taking the first engaging groove 44 being provided at a relatively inner position of the first guide rail 41 and the second guide rail 42, and the second engaging groove 45 being provided at a relatively outer position of the first guide rail 41 and the second guide rail 42 as an example, the locking pin 432 can move between the first engaging groove 44 and the second engaging groove 45. When the user needs to widen the middle width of the headrest, pulling the side wing panel 5 outward along the length direction of the adjustable headrest can drive the slider assembly 43 to slide outward along the length direction of the adjustable headrest, thereby making the locking pin 432 move from the locking position of the first locking groove 44 to the locking position of the second locking groove 45, which is convenient for the passenger to adjust to a suitable headrest width and lock it in a suitable position to improve the stability of the structure; similarly, when the user needs to retract it, it only needs to push the side wing panel 5 inward along the length direction of the adjustable headrest, which can drive the slider assembly 43 to slide inward along the length direction of the adjustable headrest, thereby making the locking pin 432 move from the locking position of the second locking groove 45 to the locking position of the first locking groove 44, which is convenient for the passenger to retract the headrest and lock it, satisfying the user's usage scenarios and improving the user experience while also ensuring the stability of the headrest locking structure.

[0051] In some embodiments, reference Figure 4 The slider assembly 43 further includes a spring 433, one end of the spring 433 is connected to the slider body 431, and the other end of the spring 433 is connected to the lock pin 432. The first clamping groove 44 and the second clamping groove 45 are configured as trapezoidal clamping grooves.

[0052] In some embodiments, the first clamping slot 44 and the second clamping slot 45 are arranged in mirror symmetry.

[0053] For example, refer to Figure 4The first clamping slot 44 and the second clamping slot 45 are configured as trapezoidal clamping slots. When the user needs to widen the middle width of the headrest, due to the arrangement of the trapezoidal slot and the spring 433, the side wing panel 5 is pulled outward along the length direction of the adjustable headrest, which can drive the slider assembly 43 to slide outward along the length direction of the adjustable headrest, so that the locking pin 432 overcomes the force of the spring 433 and disengages from the first engaging slot 44 and moves toward the engaging position of the second engaging slot 45. Due to the arrangement of the trapezoidal slot of the first engaging slot 44, the locking pin 432 can easily escape from the first engaging slot 44; similarly, when the user needs to retract the headrest, the side wing panel 5 is pushed inward along the length direction of the adjustable headrest, which can drive the slider assembly 43 to slide inward along the length direction of the adjustable headrest, so that the locking pin 432 is engaged in the engaging position of the second engaging slot 45. Due to the arrangement of the trapezoidal slot of the second engaging slot 45, the locking pin 432 is also subjected to the elastic force of the spring 433, so that the locking pin 432 can be easily engaged in the second engaging slot 45.

[0054] In some embodiments, the sliding mechanism 4 includes a first link, a second link, a third link, and a fourth link, and there are two side wing panels 5, which are arranged on both sides of the sliding mechanism 4, one side wing panel 5 is movably hinged to the first link and the second link, and the other side wing panel 5 is movably hinged to the third link and the fourth link. The first link is movably hinged to the third link, and the second link is movably hinged to the fourth link.

[0055] Specifically, the sliding mechanism 4 may also adopt a four-bar linkage, with two side wing panels 5 arranged on both sides of the sliding mechanism 4, one side wing panel 5 being movably hinged to the first link and the second link at the same time, and the other side wing panel 5 being movably hinged to the third link and the fourth link at the same time. The first link is movably hinged to the third link, and the second link is movably hinged to the fourth link. When the user needs to widen the width of the middle part of the headrest, pulling the side wing panel 5 outward along the length direction of the adjustable headrest can drive the sliding mechanism 4 to slide outward along the length direction of the adjustable headrest. At this time, the first connecting rod and the third connecting rod, the second connecting rod and the fourth connecting rod are relatively unfolded, so that the distance between the hinges of the side wing panels 5 on both sides is increased, which is convenient for passengers to adjust to a suitable headrest width; similarly, when the user needs to retract it, pushing the side wing panel 5 inward along the length direction of the adjustable headrest can drive the sliding mechanism 4 to slide inward along the length direction of the adjustable headrest. At this time, the first connecting rod and the third connecting rod, the second connecting rod and the fourth connecting rod are relatively folded, which is convenient for passengers to retract the headrest, so as to flexibly widen or reduce the width of the middle position of the headrest, thereby improving the support for the user's head, increasing the user's comfort, and enhancing the user's experience.

[0056] In some embodiments, reference Figure 2The flipping mechanism 3 includes a first connecting portion 31 and a second connecting portion 32 . The first connecting portion 31 is connected to the sliding mechanism 4 , and the second connecting portion 32 is connected to the side wing panel 5 . The first connecting portion 31 and the second connecting portion 32 are movably hinged.

[0057] Specifically, the flipping mechanism 3 may be a damping hinge structure, and flipping is achieved by movable hinge connection between the first connecting portion 31 and the second connecting portion 32 .

[0058] In this embodiment, when the user needs to adjust the flip angle of the adjustable headrest, by manually flipping the side wing panels 5 on one or both sides of the adjustable headrest, the side wing panels 5 can be flipped by the connected flipping mechanism 3 to form a certain angle with the headrest base 2, so as to facilitate the user to adjust to a suitable position to support the head. When the user needs to adjust the width of the middle part of the headrest, the side wing panels 5 are pulled outward along the length direction of the adjustable headrest, which can drive the sliding mechanism 4 to slide outward along the length direction of the adjustable headrest, so as to facilitate the user to widen the middle width of the adjustable headrest, and can increase the width of the middle position of the headrest, thereby improving the support for the user's head, increasing the user's comfort, and improving the user's experience. Similarly, when the user needs to retract the headrest, he only needs to push the side wing panel 5 inward along the length direction of the adjustable headrest, which can drive the sliding mechanism 4 to slide inward along the length direction of the adjustable headrest, so that the user can adjust the middle width of the adjustable headrest to reduce the adjustable headrest so as to retract the adjustable headrest. Moreover, since the structure is arranged inside the seat headrest, it is convenient to use and does not take up extra space. It can be flexibly adapted to various scenarios such as user resting scenes and driving scenes, and is highly practical and adaptable.

[0059] Embodiment 2

[0060] Corresponding to the above embodiment, the present application also provides a seat, which includes the adjustable headrest in the above embodiment. The headrest base 2 in the adjustable headrest can also be connected to a plug rod, and is connected to the vehicle seat body through the plug rod.

[0061] By adopting a seat with such an adjustable headrest, the user's needs for adjusting the middle width and side wing angle of the adjustable headrest can be met at the same time. Since the headrest structure is arranged inside the seat headrest, it is convenient to use and does not take up extra space. It can flexibly adapt to various scenarios such as user resting scenes and driving scenes, and is highly practical and adaptable.

[0062] Embodiment 3

[0063] Corresponding to the above embodiments, the present application also provides a vehicle, which includes the seat in the above embodiments.

[0064] By using a vehicle with such a seat, the user's needs for adjusting the middle width and side wing angle of the adjustable headrest can be met. Because the headrest structure is arranged inside the seat headrest, it is convenient to use and does not take up extra space. It can flexibly adapt to various scenarios such as user resting scenes and driving scenes, and is highly practical and adaptable.

[0065] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the embodiments of the present application.

[0066] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. An adjustable headrest, characterized in that: include: Headrest front cover, headrest base, sliding mechanism and side wing panels; The headrest front cover is connected to the headrest base to form a cavity, the sliding mechanism is arranged in the cavity, and the sliding mechanism is connected to the headrest base; The sliding mechanism slides along the length direction of the adjustable headrest to drive the connected side wing panels to slide along the same direction as the sliding mechanism.

2. The adjustable headrest according to claim 1, characterized in that: The adjustable headrest further comprises a flip mechanism, one end of which is connected to the sliding mechanism, and the other end of which is connected to the side wing panel; The side wing panel is flipped toward a direction away from the headrest base or toward a direction close to the headrest base by the flipping mechanism.

3. The adjustable headrest according to claim 2, characterized in that: The sliding mechanism comprises a first guide rail, a second guide rail and a slider assembly, the first guide rail and the second guide rail are arranged on the headrest base, and the second guide rail is connected to the headrest base; The slider assembly is slidably connected to the first guide rail and the second guide rail at the same time, and the slider assembly is connected to the flip mechanism.

4. The adjustable headrest according to claim 3, characterized in that: The slider assembly includes a slider body and a locking pin. The slider body is provided with a receiving groove for receiving the locking pin. The locking pin is simultaneously engaged with the first guide rail and the second guide rail.

5. The adjustable headrest according to claim 4, characterized in that: The first guide rail is provided with at least one first clamping groove and at least one second clamping groove, and the second guide rail is also provided with at least one first clamping groove and at least one second clamping groove; The locking pin is engaged with the first engaging groove on the first guide rail and the second guide rail at the same time, or the locking pin is engaged with the second engaging groove on the first guide rail and the second guide rail at the same time.

6. The adjustable headrest according to claim 5, characterized in that: The slider assembly further comprises a spring, one end of which is connected to the slider body, and the other end of which is connected to the locking pin; The first clamping slot and the second clamping slot are configured as trapezoidal clamping slots.

7. The adjustable headrest according to claim 6, characterized in that: The first clamping slot and the second clamping slot are arranged in mirror symmetry.

8. The adjustable headrest according to claim 1, characterized in that: The sliding mechanism comprises a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod, and the number of the side wing panels is two, and the two side wing panels are arranged on both sides of the sliding mechanism, one side wing panel is movably hinged to the first connecting rod and the second connecting rod at the same time, and the other side wing panel is movably hinged to the third connecting rod and the fourth connecting rod at the same time; The first connecting rod is movably hinged to the third connecting rod, and the second connecting rod is movably hinged to the fourth connecting rod.

9. A seat, characterized in that: The seat comprises an adjustable headrest as claimed in any one of claims 1 to 8.

10. A vehicle, characterized in that: The vehicle comprises the seat of claim 9.

Images