Back-row seat headrest and vehicle

Abstract

The utility model discloses a back-row seat headrest and a vehicle, and the back-row seat headrest comprises a contact part which comprises a headrest protective surface and headrest foam filled in the headrest protective surface; the adjusting part comprises a supporting block, a headrest rod and a limiting module, the supporting block is used for supporting the headrest foam and rotationally connected with the headrest rod through an elastic piece, and the rotating path of the supporting block passes through the lifting position and the folding position; the limiting module is assembled and connected with the supporting block and the headrest rod so as to limit the rotating motion of the supporting block in a locking state and recover the rotating motion of the supporting block in an unlocking state; and the sealing part is detachably arranged on one side of the contact part so as to enclose the supporting block, the limiting module and part of the headrest rod together with the contact part. The supporting block rotates to drive the contact part to be lifted for supporting or folded for storage, position locking is carried out through the limiting module to meet the supporting effect, and folding is carried out when no passenger exists in the corresponding position according to the use condition so that the wide rear view can be provided for a driver.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a rear seat headrest and a vehicle. Background Art

[0002] With the continuous improvement of people's living standards, vehicles have gradually become the preferred means of travel for people, and the usage rate of the back seats of vehicles is also getting higher and higher. For the rear passengers, they also need to provide headrests with good support to meet their comfort needs during the ride. However, the headrests in the back row, especially the middle seat in the back row, will affect the driver's rear view while meeting the comfort. In some driving conditions, the rear view will be blocked and missing, affecting the driving safety.

[0003] Therefore, how to meet the comfort needs of rear passengers and reduce the driving risks of the driver is a technical problem that needs to be urgently solved by technical personnel in this field. Utility Model Content

[0004] The utility model provides a rear seat headrest and a vehicle, so as to meet the comfort requirements of rear passengers and reduce the driving risk of the driver.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] In a first aspect, the utility model provides a rear seat headrest, comprising:

[0007] The contact part includes a headrest cover and a headrest foam filled in the headrest cover;

[0008] The adjustment part includes a support block, a headrest rod and a limiting module, wherein the support block is used to support the foaming of the headrest and is rotatably connected to the headrest rod through an elastic member, and the rotation path of the support block relative to the headrest rod passes through a raised position and a folded position; the limiting module is assembled and connected to the support block and the headrest rod at the same time to limit the rotational movement of the support block when in a locked state, and restore the rotational movement of the support block when in an unlocked state;

[0009] The sealing part is detachably arranged on one side of the contact part to surround the support block, the limiting module and part of the headrest rod together with the contact part.

[0010] Optionally, in the above-mentioned rear seat headrest, the limiting module includes a limiting bracket and a locking bracket, the locking bracket is fixedly arranged on the headrest rod, and the limiting bracket is slidably arranged on the supporting block in the first direction;

[0011] The locking bracket is provided with a limiting groove in the first direction for the limiting bracket to be inserted into so as to be locked with the limiting bracket, and the limiting bracket is disengaged from the limiting groove when sliding to the unlocking position in the first direction.

[0012] Optionally, the above-mentioned rear seat headrest also includes a folding button arranged on one side of the adjustment part, the folding button abuts against the limit bracket through a spring sheet, and can drive the limit bracket to slide to an unlocked position during a pressing stroke along the first direction.

[0013] Optionally, the above-mentioned rear seat headrest also includes a return spring, and both ends of the return spring are respectively fixedly connected to the support block and the limit bracket. When the limit bracket is in the unlocked position, the return spring is in a stretched state.

[0014] Optionally, in the above-mentioned rear seat headrest, a limiting hole extending along the first direction is opened on the limiting bracket, and the limiting bracket is slidably arranged on the support block by a fixing screw passing through the limiting hole and fixedly connected to the support block.

[0015] Optionally, in the above-mentioned rear seat headrest, the elastic member is a coil spring and at least two are symmetrically arranged, and the two ends of a single coil spring are respectively overlapped with the support block and the headrest rod, and when the support block is in the raised position, the coil spring is in a stretched state and applies a force to the support block tending to rotate toward the folded position.

[0016] Optionally, in the above-mentioned rear seat headrest, a buffer pad is fixedly provided on the locking bracket, and when the support block is rotated to the folding position, the limiting bracket contacts the buffer pad.

[0017] Optionally, in the above-mentioned rear seat headrest, the folding button includes a main body, a shell and a button spring. The shell is fixed to one side of the support block and is grooved inside. The main body and the button spring are both arranged through the shell. The main body is pressed to move in a first direction and compress the button spring, and is driven to reset by the button spring when there is no external force.

[0018] Optionally, in the above-mentioned rear seat headrest, a plurality of clamping protrusions are further provided on the limit bracket, and a corresponding clamping groove is provided on the support block, and during the movement of the limit bracket along the first direction and the sliding of the support block relative to the headrest rod, the clamping protrusions remain clamped with the clamping grooves.

[0019] In a second aspect, the utility model provides a vehicle, wherein at least one rear seat of the vehicle is provided with a rear seat headrest provided by any one of the above-mentioned embodiments.

[0020] It can be seen from the above technical scheme that the rear seat headrest provided by the utility model adjusts the contact part through the adjustment part, and the adjustment part specifically includes a support block, a headrest rod and a limit module. The support block realizes relative rotation connection with the headrest rod through an elastic member, so that it can rotate to a raised position and a folded position relative to the headrest rod, and drives the contact part to be located in the corresponding raised support state and folded storage state. The rear passengers meet the head support needs through the raised support state of the contact part, and adjust the contact part to the folded storage state when there are no passengers or children in the back row and no headrest is needed, so as to provide the driver with sufficient rear vision. At the same time, the limit module is assembled and connected with the support block and the headrest rod at the same time, so as to limit the rotation of the support block in the locked state, and restore the rotation movement of the support block in the unlocked state. The locking of the limit module can make the support block stably located in the raised position and the folded position to meet the use needs. The above structure can set a comfortable headrest that meets the head support needs of the passengers in the back row, and adjust it to the folded storage state when it is not needed to balance the driver's rear vision needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. Obviously, the drawings described below are only some examples or embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without creative work, and the utility model can also be applied to other similar scenarios based on the provided drawings. Unless it is obvious from the language environment or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

[0022] Figure 1 It is a schematic diagram of the supporting state of the rear seat headrest provided by the embodiment of the utility model;

[0023] Figure 2 yes Figure 1 Exploded diagram of

[0024] Figure 3 It is a schematic diagram of the internal structure of the regulating unit;

[0025] Figure 4 It is a schematic diagram of the assembly structure of the limit module and the folding button;

[0026] Figure 5 It is a schematic diagram of the assembly structure of the support block and the limiting bracket;

[0027] Figure 6 It is a schematic diagram of the assembly structure of the support block and the headrest rod.

[0028] Among them, 10-contact part; 110-headrest cover; 120-headrest foam; 20-adjustment part; 210-support block; 2110-clamping groove; 220-headrest rod; 230-limiting module; 2310-limiting bracket; 23110-limiting hole; 23120-clamping protrusion; 2320-locking bracket; 23210-limiting groove; 240-elastic part; 250-reset spring; 260-fixing screw; 270-buffer pad; 30-sealing part; 310-rear support; 320-decorative cover; 40-folding button; 410-main body; 420-shell; 430-button spring; 50-spring sheet. DETAILED DESCRIPTION

[0029] The balance between the headrest support requirements of the vehicle's rear seats and the driver's rearward field of vision is a contradiction that currently exists in the design and use of vehicles. How to meet the comfort needs of rear passengers and reduce the driver's driving risks is a problem currently faced by vehicle designers.

[0030] In order to make the technical personnel in this field better understand the present invention, the embodiments of the present invention are described below with reference to the accompanying drawings. In addition, the embodiments shown below do not limit the contents of the utility model described in the claims. In addition, the entire contents of the structures represented by the following embodiments are not limited to those necessary for the solutions of the utility model described in the claims.

[0031] See also Figure 1-6 The rear seat headrest provided by the embodiment of the utility model mainly includes a contact portion 10, an adjusting portion 20 and a sealing portion 30, wherein a cavity structure is arranged in the contact portion 10 for installation of the adjusting portion 20, and the contact portion 10 is driven to move by the adjusting portion 20, while the sealing portion 30 blocks the groove opening of the contact portion 10 from the back side to seal and protect the adjusting portion 20.

[0032] Specifically, the contact portion 10 includes a headrest cover 110 and a headrest foam 120. The headrest cover 110 is the contact and shaping surface of the rear seat headrest, and is filled with headrest foam 120 to maintain the comfort of the passenger's head when the head contacts it. The adjustment portion 20 includes a support block 210, a headrest rod 220 and a limit module 230, wherein the support block 210 is used to support the contact portion 10, and is preferably embedded in the contact portion 10 to support the integrated structure of the headrest foam 120 and the headrest cover 110, and the support block 210 is rotatably connected to the headrest rod 220 through an elastic member 240. It should be noted here that the headrest rod 220 is a common U-shaped rod structure, and its closed end area is located in the contact portion 10, and the support block 210 is rotatably connected to the area of ​​the headrest rod 220 located in the contact portion 10. The rotatably connected support block 210 has the ability to rotate relative to the headrest rod 220, so that the support block 210 can rotate through the raised position and the folded position. It should be noted that when the support block 210 is in the raised position, it can drive the contact portion 10 to be in an inclined state, so as to be in a raised support position to support the passenger's head; and when the support block 210 is in the folded position, it drives the contact portion 10 to be stored in a state parallel or approximately parallel to the horizontal plane, and at this time, the contact portion 10 can avoid the driver's rear view. When there are no passengers in the corresponding position of the back row, or when there are shorter passengers such as children, the support block 210 can be rotated to the folded position to fold and store the contact portion 10, thereby providing the driver with a field of vision and improving the safety of the driving process.

[0033] The position limiting module 230 is used to lock the position of the support block 210. Specifically, the position limiting module 230 is assembled and connected with the support block 210 and the headrest rod 220 at the same time to interfere with the relative movement process of the support block 210 and the headrest rod 220. It can lock the position of the support block 210 by electromagnet attraction, pressing buckle or gear structure. At the same time, the position limiting module 230 can switch between a locked state and an unlocked state. For example, when the position limiting module 230 is an electromagnet structure, it is in a locked state under power-on conditions to lock the support block 210 through attraction; and in an unlocked state under power-off conditions, so that the support block 210 can rotate relative to the headrest rod 220. If the limit module 230 is a press buckle structure, when it is pressed, the buckle shrinks, and the support block 210 and the headrest rod 220 can rotate freely. When the pressing force is no longer applied, the elastic buckle expands on both sides to fit into the corresponding slot to lock the support block 210 and prevent the support block 210 from continuing to move.

[0034] In the above structure, when the rear passengers need to use the headrest for support, they only need to rotate the integrated structure of the contact portion 10 and the support block 210 until the support block 210 reaches the raised position when the support block 210 is in the unlocked state, and then switch the limit module 230 to the locked state to maintain the good support effect of the contact portion 10. When the headrest is not needed, the limit module 230 is switched to the unlocked state and the support block 210 is rotated to the folded position, so that the contact portion 10 is stored in a nearly horizontal state, thereby meeting the driver's rearward field of view requirements.

[0035] The sealing portion 30 is detachably arranged on one side of the contact portion 10 to seal the cavity opening of the contact portion 10, and cooperates with the contact portion 10 to enclose the support block 210, the limiting module 230 and part of the headrest rod 220, so as to improve the integrity of the rear seat headrest while protecting the internal structural components, and meet the maintenance requirements through the detachable structure.

[0036] It should be noted that the sealing portion 30 can be assembled with the contact portion 10 by means of a snap connection or a bolt connection, so as to facilitate assembly and disassembly. In some embodiments of the utility model, the sealing portion 30 specifically includes a rear support 310 and a decorative cover 320 disposed on both sides of the rear support 310. The rear support 310 provides a main blocking and supporting structure, and the decorative cover 320 has a hole for the headrest rod 220 to pass through, and can be provided with an annular exterior structure in the circumferential direction for decoration, thereby improving the integrity and aesthetics of the rear side of the rear seat headrest.

[0037] The rear seat headrest provided by the embodiment of the utility model adjusts the contact part 10 through the adjustment part 20. The adjustment part 20 specifically includes a support block 210, a headrest rod 220 and a limit module 230. The support block 210 is connected to the headrest rod 220 through an elastic member 240 to achieve relative rotation, so that it can rotate to a raised position and a folded position relative to the headrest rod 220, and drive the contact part 10 to be located in the corresponding raised support state and folded storage state. The rear passengers meet the head support needs through the raised support state of the contact part 10, and adjust the contact part 10 to the folded storage state when there are no passengers or children in the back row and no headrest is needed, so as to provide the driver with sufficient rear vision. At the same time, the limiting module 230 is assembled and connected with the support block 210 and the headrest rod 220 at the same time to limit the rotation of the support block 210 in the locked state and restore the rotation movement of the support block 210 in the unlocked state. The locking of the limiting module 230 can make the support block 210 stably located in the raised position and the folded position to meet the use requirements. The above structure can set a comfortable headrest in the back row that meets the head support needs of the passengers, and adjust it to the folded storage state when not in use to balance the driver's rear field of view requirements.

[0038] In order to further optimize the above technical solution, in some embodiments of the present utility model, the limit module 230 is a mechanical limit and unlock structure, which specifically includes a limit bracket 2310 and a locking bracket 2320. Among them, the locking bracket 2320 is fixedly connected with the headrest rod 220 as an integral structure, and the limit bracket 2310 is used to connect with the support block 210 to drive the support block 210 to move, and it should be noted that the limit bracket 2310 is also slidably arranged on the support block 210 in the first direction so as to be able to slide relative to the support block 210 in the first direction, and the locking and unlocking states of the limit module 230 are switched based on the stroke of this relative movement.

[0039] On the basis of this structure, a limiting groove 23210 is opened on the locking bracket 2320, and the limiting groove 23210 is also arranged along the first direction. The limiting bracket 2310 is inserted into the limiting groove 23210 and locked with the locking bracket 2320. The locking here specifically refers to that the limiting bracket 2310 and the locking bracket 2320 cannot rotate relative to each other, and the support block 210 and the headrest rod 220 are kept in a relatively stable state.

[0040] At the same time, since the limiting groove 23210 on the locking bracket 2320 is arranged along the first direction, and the limiting bracket 2310 is also slidably arranged on the support block 210 in the first direction, when the headrest structure maintains a stable state, the limiting bracket 2310 can change its position relative to the locking bracket in the first direction, and an unlocking position is set on the sliding path of the locking bracket along the first direction, so that the locking bracket is disengaged from the limiting groove 23210 when it slides to the unlocking position. At this time, the limiting bracket 2310 is separated from the locking bracket and is not locked by the position of the locking bracket, that is, the limiting module 230 is in an unlocked state, and the support block 210 can slide relative to the headrest rod 220, thereby adjusting the position of the contact part 10.

[0041] It should be noted that, preferably, when the limiting bracket 2310 is inserted into the limiting groove 23210 and the supporting block 210 is locked, the supporting block 210 is located in a raised position to maintain a stable supporting effect of the contact portion 10. At the same time, the first direction is preferably the width direction of the vehicle body.

[0042] On the basis of the above structure, by setting a limiting groove 23210 extending along the first direction on the locking bracket, the limiting bracket 2310 can drive the support block 210 to be stably located in the lifting position. In order to meet the quick limiting of the support block 210 in the folded position, in some embodiments of the utility model, the elastic member 240 for rotating the support block 210 and the headrest rod 220 is a coil spring, which is sleeved on the outer periphery of the headrest rod 220, and the two ends are overlapped or fixed with the support block 210 and the headrest rod 220 respectively, so that the support block 210 and the headrest rod 220 can rotate relative to each other while maintaining the connection. In order to improve the connection stability of the coil spring for the support block 210 and the headrest rod 220, it is preferred that at least two coil springs are arranged at intervals. In particular, when the support block 210 is in the lifting position, the coil spring is in a stretched state, the spring elastic force acts on the support block 210, and applies a force to the support block 210 that tends to rotate toward the folded position. In the above structure, when the support block 210 is in the raised position, the limit bracket 2310 and the locking bracket 2320 are in a locked state and cannot rotate relative to each other, so that the support block 210 is stably located in the raised position and the coil spring is in a stretched state; when the limit bracket 2310 slides along the first direction to the unlocked position, it disengages from the limit slot 23210. At this time, the mounting block will automatically rotate rapidly under the elastic force of the coil spring, and will be limited again after rotating to the folded position to complete the switching of the contact part 10 state.

[0043] It should also be noted that, due to the action of the coil spring, the integrated structure of the support block 210 and the limiting bracket 2310 will move rapidly after the limiting bracket 2310 is disengaged from the limiting groove 23210, and the limiting bracket 2310 will rotate to a position in contact with the locking bracket 2320. Therefore, in some embodiments of the utility model, a buffer pad 270 is also fixedly provided on the locking bracket 2320. When the support block 210 is rotated to the folded position, the limiting bracket 2310 will contact the buffer pad 270 to avoid damage to the limiting bracket 2310 and the locking bracket 2320 due to rigid collision, and reduce abnormal noise during state switching.

[0044] It should be noted that the purpose of the limit bracket 2310 contacting the buffer pad 270 is to set the limit bracket 2310 at the maximum flipping angle, so that the support block 210 with which it is an integral structure can be flipped at the maximum angle relative to the headrest rod 220, while maintaining its folded position to minimize the occupancy of the driver's rear field of vision.

[0045] Further, in order to reduce the difficulty of operation when the state of the rear seat headrest is switched, in some embodiments of the utility model, a folding button 40 is further provided on one side of the adjustment part 20. The folding button 40 is a protruding button structure to provide an obvious guide prompt for the operation of the passenger. The pressing stroke of the folding button 40 is set along the first direction, so as to drive the limit bracket 2310 to slide by providing a pressing force to the folding button 40. It should be noted that the folding button 40 drives the limit bracket 2310 by abutting and pushing. Therefore, it is preferred that a spring sheet 50 is provided between the folding button 40 and the limit bracket 2310, so as to soften and transmit the pressing force through the spring sheet 50, and optimize the rigid push into a flexible transmission process. In the structure of this embodiment, when the passenger needs to switch the support block 210 from the lifting position to the folding position, he only needs to press the folding button 40. After the folding button 40 pushes the limit bracket 2310 to move to the unlocking position along the first direction, the support block 210 and the headrest rod 220 can be unlocked to realize the rotation movement of the support block 210. In combination with other embodiments of the present invention, namely the setting of the coil spring, it can be achieved that after the limiting bracket 2310 is pushed to unlock from the limiting groove 23210 by the folding button 40, the coil spring acts to make the support block 210 automatically and quickly rotate to the folding position.

[0046] On the basis of the above embodiment, the specific structure of the folding button 40 includes a body 410, a shell 420 and a button spring 430, wherein the shell 420 is fixed to one side of the support block 210 as a basic bearing structure, and the shell 420 is internally slotted, the body 410 and the button spring 430 are both arranged through the slot on the shell 420, one end of the button spring 430 is fixed inside the shell 420, and the other end is connected to the body 410. When the body 410 is pressed, it can slide along the shell 420 and move in the first direction, and the process of the body 410 being pressed and moved will compress the button spring 430. After the movement of the body 410 drives the limiting bracket 2310 to move in the first direction to the unlocking position, the body 410 can be reset by releasing the pressing of the body 410 through the action of the button spring 430, while maintaining the integrity of the structure of the folding button 40 and the convenience of repeated use.

[0047] In order to further optimize the above technical solution, a return spring 250 is further provided inside the rear seat headrest. The return spring 250 is preferably a tension spring and its two ends are respectively fixedly connected to the support block 210 and the limit bracket 2310. It should also be noted that when the support block 210 needs to be switched from the raised position to the folded position, the limit bracket 2310 will be driven to move to the unlocked position. During this movement, the return spring 250 is continuously in a stretched state to apply a force tending to return the limit bracket 2310 to the original position. However, under the pressing force, the return spring 250 will not produce a displacement driving effect. On this basis, when the support block 210 switches from the folded position to the raised position, the limit bracket 2310 is aligned with the limit groove 23210 on the locking bracket 2320 again. At this time, the return spring 250 in the stretched state will drive the limit bracket 2310 to move so as to be stuck in the limit groove 23210, thereby completing the locking with the locking bracket 2320 and realizing the locking of the support block 210 and the headrest rod 220.

[0048] In addition, it should be noted that, for the sliding structure setting of the limiting bracket 2310 on the support block 210, in order to save space and reduce the complexity of the structure, it is preferred that the limiting bracket 2310 is provided with a limiting hole 23110 extending along the first direction, and the limiting hole 23110 is preferably an oblong hole structure, and the limiting bracket 2310 is slidably set on the support block 210 by a fixing screw 260 that passes through the limiting hole 23110 and is fixedly connected to the support block 210, and the limiting bracket 2310 can slide along the first direction under the guidance of the fixing screw 260 and the limiting hole 23110. It should be noted that it is preferred that two limiting holes 23110 are arranged at intervals to maintain the stability of the guiding process.

[0049] On the basis of the above embodiment, in order to further improve the integrated connection structure between the limiting bracket 2310 and the support block 210, a plurality of clamping protrusions 23120 are further provided on the limiting bracket 2310, and a corresponding number of clamping grooves 2110 are correspondingly provided on the support block 210. The clamping protrusions 23120 correspond to the clamping grooves 2110 one by one and are clamped and connected. It should be noted that during the movement of the limiting bracket 2310 along the first direction and the sliding of the support block 210 relative to the headrest rod 220, the clamping protrusions 23120 are kept in a clamping state with the clamping grooves 2110 to maintain the integrated structure of the limiting bracket 2310 and the support block 210 so that they can rotate synchronously.

[0050] Some embodiments of the utility model further disclose a vehicle, wherein at least one rear seat of the vehicle is provided with a rear seat headrest provided by any of the above embodiments. Since the rear seat headrest has the above effects, the above vehicle also has corresponding effects, which will not be described in detail here. It should be noted that the above vehicle can be a pure electric vehicle, a hybrid vehicle, a fuel vehicle, etc.

[0051] It should be noted that, for the convenience of description, only the parts related to the utility model are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the utility model can be combined with each other.

[0052] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0053] The above description is only a preferred embodiment of the utility model and an explanation of the technical principles used, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. The scope of the utility model involved in the utility model is not limited to the technical solution formed by a specific combination of the above-mentioned technical features, but also should cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the concept of the above-mentioned utility model. For example, the above-mentioned features are replaced with the technical features with similar functions disclosed in the utility model (but not limited to) to form a technical solution.

Claims

1. A rear seat headrest, characterized in that: include: A contact portion, comprising a headrest cover and headrest foam filled in the headrest cover; The adjustment part includes a support block, a headrest rod and a limiting module, wherein the support block is used to support the foaming of the headrest and is rotatably connected to the headrest rod through an elastic member, and the rotation path of the support block relative to the headrest rod passes through a raised position and a folded position; the limiting module is assembled and connected to the support block and the headrest rod at the same time to limit the rotational movement of the support block when in a locked state, and restore the rotational movement of the support block when in an unlocked state; The sealing part is detachably arranged on one side of the contact part to enclose the support block, the limiting module and a part of the headrest rod together with the contact part.

2. The rear seat headrest according to claim 1, characterized in that: The limiting module comprises a limiting bracket and a locking bracket, wherein the locking bracket is fixedly arranged on the headrest rod, and the limiting bracket is slidably arranged on the supporting block in a first direction; The locking bracket is provided with a limiting groove in the first direction for the limiting bracket to be inserted into so as to be locked with the limiting bracket, and the limiting bracket is disengaged from the limiting groove when sliding to an unlocking position in the first direction.

3. The rear seat headrest according to claim 2, characterized in that: It also includes a folding button arranged on one side of the adjusting portion, wherein the folding button abuts against the limiting bracket through a spring sheet and can drive the limiting bracket to slide to the unlocking position during a pressing stroke along the first direction.

4. The rear seat headrest according to claim 3, characterized in that: It also includes a return spring, the two ends of which are respectively fixedly connected to the support block and the limit bracket, and when the limit bracket is located at the unlocking position, the return spring is in a stretched state.

5. The rear seat headrest according to claim 2, characterized in that: The limiting bracket is provided with a limiting hole extending along the first direction, and the limiting bracket is slidably disposed on the supporting block by a fixing screw passing through the limiting hole and fixedly connected to the supporting block.

6. The rear seat headrest according to claim 2, characterized in that: The elastic member is a coil spring and at least two of them are symmetrically arranged, and the two ends of a single coil spring are respectively overlapped with the support block and the headrest rod, and when the support block is in the raised position, the coil spring is in a stretched state and applies a force to the support block tending to rotate toward the folded position.

7. The rear seat headrest according to claim 6, characterized in that: A buffer pad is fixedly arranged on the locking bracket, and when the support block rotates to the folding position, the limiting bracket contacts the buffer pad.

8. The rear seat headrest according to claim 3, characterized in that: The folding button includes a main body, a shell and a button spring. The shell is fixed to one side of the support block and has a groove inside. The main body and the button spring are both arranged through the shell. The main body is pressed to move along the first direction and compress the button spring, and is driven to reset by the button spring when there is no external force.

9. The rear seat headrest according to claim 5, characterized in that: The limiting bracket is also provided with a plurality of clamping protrusions, and the supporting block is correspondingly provided with clamping grooves, and during the movement of the limiting bracket along the first direction and the sliding of the supporting block relative to the headrest rod, the clamping protrusions are kept clamped with the clamping grooves.

10. A vehicle, characterized in that: At least one rear seat is provided with a rear seat headrest according to any one of claims 1-9.

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