Headrest assembly and seat

Abstract

The present invention discloses a headrest assembly and a seat, wherein the headrest assembly includes: a bracket; a headrest body, wherein the headrest body is rotatably arranged on the bracket; a driving assembly, wherein the driving assembly is fixed to the bracket and is in transmission connection with the headrest body, wherein the driving assembly includes: a first driving member and a rotating shaft, wherein the first driving member is fixed to the bracket and is in transmission connection with the rotating shaft, wherein the rotating shaft passes through the headrest body and the bracket so that the headrest body can be rotatably arranged on the bracket; and a locking assembly, wherein the locking assembly is fixed to the bracket and spaced apart from the driving assembly, wherein the locking assembly selectively locks the rotating shaft. The driving assembly drives the headrest body to rotate relative to the bracket, and the locking assembly locks the rotating shaft, thereby fixing the headrest body in a certain position, thereby meeting the requirements for the folding angle of the headrest assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of headrest assemblies, and in particular to a headrest assembly and a seat. Background Art

[0002] When a car seat is not in use, the rear and front passenger headrests will affect the driver's field of vision due to the high position of the seat headrests, and the front passenger headrest will affect the field of vision of the rear passengers, affecting the driving safety and riding experience of the driver and passengers.

[0003] In the related art, the headrest is usually folded forward to improve the field of vision of the driver and passengers. The current structure only satisfies the requirement of folding forward, and the folding mechanism occupies a large space, affecting the layout of other seat structures. Summary of the Invention

[0004] 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 assembly that uses a drive assembly to drive the headrest body to rotate relative to a bracket, and a locking assembly to lock the rotating shaft, thereby fixing the headrest body in a certain position, thereby meeting the requirements for the folding angle of the headrest assembly.

[0005] The invention also provides a seat.

[0006] According to the first embodiment of the present invention, the headrest assembly includes: a bracket; a headrest body, which is rotatably arranged on the bracket; a driving component, which is fixed to the bracket and is in transmission connection with the headrest body, and the driving component includes: a first driving member and a rotating shaft, the first driving member is fixed to the bracket, and the first driving member is in transmission connection with the rotating shaft, the rotating shaft passes through the headrest body and the bracket so that the headrest body can be rotatably arranged on the bracket; a locking component, which is fixed to the bracket and spaced apart from the driving component, and the locking component selectively locks the rotating shaft.

[0007] According to the headrest assembly of an embodiment of the present invention, the driving component is used to drive the headrest body to rotate relative to the bracket, and the locking component is used to lock the rotating shaft, thereby fixing the headrest body in a certain position, thereby meeting the requirements for the folding angle of the headrest assembly.

[0008] According to some embodiments of the present invention, a plurality of first locking portions are provided on the rotating shaft, and a second locking portion is provided on a side of the locking assembly facing the rotating shaft, and the second locking portion is locked and matched with any one of the first locking portions.

[0009] According to some embodiments of the present invention, the locking assembly includes: a second driving member and a locking member, the second driving member and the locking member are in transmission cooperation and the end of the locking member away from the second driving member is a second locking portion, and the second driving member drives the locking member to move in the height direction so that the second locking portion and the first locking portion are locked and cooperated.

[0010] According to some embodiments of the present invention, the locking assembly further includes: a first transmission member, the first transmission member is arranged between the second driving member and the locking member, an opening is provided on the bracket, and the first transmission member moves in the opening.

[0011] According to some embodiments of the present invention, the second driving member includes: a driving body, a driving shaft and a reset member, the driving body and the driving shaft are transmission-connected, and the reset member is disposed between the driving shaft and the driving body.

[0012] According to some embodiments of the present invention, a guiding slope is provided on a side of the second locking portion facing the first locking portion.

[0013] According to some embodiments of the present invention, a first limiting protrusion is provided on the rotating shaft, and the first limiting protrusion is circumferentially arranged on the outside of the rotating shaft. The first limiting protrusion is circumferentially arranged with a plurality of limiting grooves spaced apart, and the limiting grooves constitute the first locking portion.

[0014] According to some embodiments of the present invention, a second limiting protrusion is provided on the bracket, and the second limiting protrusion is arranged toward the first limiting protrusion. The first limiting protrusion is provided with an avoidance groove on one side in the axial direction, and the second limiting protrusion and the avoidance groove are selectively abutted at both ends in the circumferential direction.

[0015] According to some embodiments of the present invention, the drive assembly further includes: a second transmission member and a third transmission member, the second transmission member is fixed to the drive member and is in transmission connection with the drive member, the third transmission member is fixed to the rotating shaft, and the second transmission member and the third transmission member are in transmission connection.

[0016] According to some embodiments of the present invention, the first driving member extends in a height direction; or the first driving member extends in a width direction.

[0017] According to some embodiments of the present invention, the driving assembly further includes: a vibration damper, one end of which is fixed to the bracket, and one end of which is arranged opposite to the outer surface of the first driving member.

[0018] According to some embodiments of the present invention, the headrest assembly further includes: a connecting plate, the connecting plate is fixed to the bracket, the connecting plate is provided with a through hole, and the rotating shaft passes through the through hole.

[0019] According to some embodiments of the present invention, the bracket is provided with one of a positioning column and a positioning hole, and the connecting plate is provided with the other of a positioning column and a positioning hole, and the positioning column and the positioning hole are positioned and matched.

[0020] A seat according to an embodiment of the second aspect of the present invention includes: a seat body and the headrest assembly, wherein the headrest assembly is disposed on the seat body and is rotatable relative to the seat body.

[0021] 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

[0022] 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:

[0023] Figure 1 is a structural schematic diagram of a headrest assembly according to an embodiment of the present invention;

[0024] Figure 2 yes Figure 1 Partial schematic diagram A in FIG;

[0025] Figure 3 is an exploded view of a headrest assembly according to an embodiment of the present invention;

[0026] Figure 4 is a schematic structural diagram of a bracket according to an embodiment of the present invention;

[0027] Figure 5 is a schematic structural diagram of a rotating shaft according to an embodiment of the present invention;

[0028] Figure 6 2 is a schematic structural diagram of a locking member according to an embodiment of the present invention.

[0029] Reference numerals:

[0030] 100. Headrest assembly;

[0031] 10. Bracket; 11. Opening; 12. Second limiting protrusion; 13. Positioning column; 14. First receiving groove; 15. Second receiving groove;

[0032] 20. Headrest body;

[0033] 30. Drive assembly; 31. First drive member; 32. Rotating shaft; 321. First limiting protrusion; 322. Limiting groove; 323. Avoidance groove; 33. Second transmission member; 34. Third transmission member;

[0034] 40. Locking assembly; 41. Second driving member; 42. Locking member; 421. Guide slope; 43. First transmission member; 44. Vibration damping member;

[0035] 50. Connecting plate; 51. Positioning hole; 52. Via hole. DETAILED DESCRIPTION

[0036] The embodiments of the present invention will be described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention will be described in detail below.

[0037] Reference below Figures 1-6 The headrest assembly 100 according to an embodiment of the present invention is described. The present invention also provides a seat having the headrest assembly 100 .

[0038] Reference Figures 1-6 As shown, the headrest assembly 100 of an embodiment of the present invention includes a bracket 10 and a headrest body 20, with the headrest body 20 being rotatably mounted on the bracket 10. Specifically, the headrest body 20 can rotate relative to the bracket 10, thereby allowing the headrest body 20 to rotate relative to the seat body. When a passenger is seated in the passenger seat, the headrest body 20 can be in an extended position relative to the bracket 10, allowing the passenger to rest their head on the headrest body 20. This improves both the passenger's comfort and safety. Furthermore, when the passenger seat is unoccupied, the headrest body 20 can be in a stowed position relative to the bracket 10, preventing the passenger's headrest body 20 from obstructing the rear passenger's field of view, thereby impacting the driver and passengers' driving safety and riding experience.

[0039] In addition, the headrest assembly 100 also includes a drive component 30, which is fixed to the bracket 10, and the drive component 30 and the headrest body 20 are transmission-connected. By setting the drive component 30, that is, when the position of the headrest body 20 needs to be adjusted, the drive component 30 is started, and the drive component 30 can drive the headrest body 20 to rotate relative to the bracket 10, thereby realizing the adjustment of the position of the headrest body 20.

[0040] Specifically, the drive assembly 30 refers to Figure 3As shown, the headrest body 20 includes a first driving member 31 and a rotating shaft 32. The first driving member 31 is fixed to the bracket 10 and is in driving connection with the rotating shaft 32. The rotating shaft 32 passes through the headrest body 20 and the bracket 10 so that the headrest body 20 can be rotatably mounted on the bracket 10. In other words, the first driving member 31 and the rotating shaft 32 are in driving connection with each other. When the headrest body 20 needs to be adjusted, the first driving member 31 drives the rotating shaft 32 to rotate. The rotation of the rotating shaft 32 also drives the headrest body 20 to rotate, thereby changing the position of the headrest body 20.

[0041] Furthermore, the first driving member 31 can be electrically connected to the vehicle controller, that is, the driver can directly start the first driving member 31 through buttons or voice control, which makes the adjustment of the headrest assembly 100 more convenient and intelligent.

[0042] and reference Figure 1 As shown, the headrest assembly 100 further includes a locking assembly 40, which is fixed to the bracket 10 and spaced apart from the drive assembly 30. The locking assembly 40 selectively locks the rotating shaft 32. Specifically, by providing the locking assembly 40, the headrest body 20 can be locked in a certain position. For example, when the headrest body 20 needs to be adjusted to the stowed position, the locking assembly 40 first cancels the lock with the rotating shaft 32. The first drive member 31 then drives the rotating shaft 32 to rotate, allowing the headrest body 20 to rotate from the deployed position to the stowed position. The locking assembly 40 then locks with the rotating shaft 32, thereby locking the rotating shaft 32 and securing the headrest body 20 in the stowed position. Similarly, for example, when the headrest body 20 needs to be adjusted to the deployed position, the locking assembly 40 is first released from the lock with the rotating shaft 32, and then the first driving member 31 drives the rotating shaft 32 to rotate, so that the headrest body 20 can be rotated from the storage position to the deployed position, and then the locking assembly 40 and the rotating shaft 32 are locked and matched, thereby achieving the locking of the rotating shaft 32, that is, the headrest body 20 is fixed in the deployed position.

[0043] Thus, the headrest body 20 is driven to rotate relative to the bracket 10 by the driving component 30, and the rotating shaft 32 is locked by the locking component 40, so that the headrest body 20 is fixed in a certain position, thereby meeting the requirements for the folding angle of the headrest assembly 100.

[0044] Furthermore, a plurality of first locking portions are provided on the rotating shaft 32, and a second locking portion is provided on the side of the locking assembly 40 facing the rotating shaft 32, wherein the second locking portion is locked and engaged with any one of the first locking portions. In other words, a plurality of first locking portions are provided on the rotating shaft 32, and the plurality of first locking portions are spaced apart in the circumferential direction, and a second locking portion is provided on the locking assembly 40, so that the second locking portion can be locked and engaged with any one of the first locking portions, thereby achieving locking of the headrest body 20. Each first locking portion corresponds to a position. For example, the headrest body 20 has an extended position and a stowed position. When the headrest body 20 is in the extended position, the second locking portion is locked and engaged with the corresponding first locking portion. Similarly, when the headrest body 20 is in the stowed position, the second locking portion is locked and engaged with the corresponding first locking portion.

[0045] Furthermore, the headrest body 20 can also have an adjustable position, that is, the headrest body 20 can be locked and fixed between the deployed position and the stored position, so that the headrest body 20 can be fixed at different angles, thereby improving the comfort of use of the headrest body 20.

[0046] Reference Figure 3 As shown, the locking assembly 40 includes a second driving member 41 and a locking member 42. The second driving member 41 and the locking member 42 are in driving engagement with each other, and the end of the locking member 42 away from the second driving member 41 is a second locking portion. The second driving member 41 drives the locking member 42 to move in the height direction, thereby locking the second locking portion with the first locking portion. In other words, the second driving member 41 drives the locking member 42 to move in the height direction, thereby locking the second locking portion on the locking member 42 with any one of the first locking portions, thereby enabling the headrest body 20 to switch between different positions.

[0047] Furthermore, a bushing may be provided between the locking member 42 and the bracket 10 , and the bushing may reduce wear between the locking member 42 and the bracket 10 .

[0048] Furthermore, a linear bearing is provided between the locking member 42 and the bracket 10 , that is, the wear between the locking member 42 and the bracket 10 can also be reduced by the linear bearing.

[0049] Furthermore, a fifth mounting hole is provided on the bracket 10 , and the fastener is fixedly connected to the second driving member 41 after passing through the fifth mounting hole, so that the second driving member 41 can be fixed on the bracket 10 .

[0050] Of course, the second driving member 41 can also be fixed to the bracket 10 by other fixing methods. For example, the second driving member 41 can be fixed to the bracket 10 by clamping or bonding.

[0051] Among them, reference Figure 3As shown, the second driving member 41 can be an electromagnet. Specifically, the second driving member 41 includes: a driving body, a driving shaft, and a reset member. The driving body and the driving shaft are in driving connection, and the reset member is disposed between the driving shaft and the driving body. The driving body can drive the driving shaft downward to engage, at which time the reset member is compressed, thereby providing a reset force to the driving shaft through the reset member. In other words, this can facilitate the reset of the driving shaft, that is, the driving shaft drives the locking member 42 to lock the rotating shaft 32. For example, when the headrest body 20 needs to be adjusted, the driving body controls the driving shaft to engage downward, and at the same time, the driving shaft drives the locking member 42 to move downward, thereby separating the second locking portion and the first locking portion. At this time, the headrest body 20 is in a free state, that is, the headrest body 20 can be rotated arbitrarily; when the headrest body 20 is moved into place, the driving body is powered off, and the driving shaft is in a free state, thereby driving the driving shaft to move upward through the reset member, and at the same time, the driving shaft drives the locking member 42 to move upward, thereby locking the second locking portion and the first locking portion. At this time, the headrest body 20 is in a locked state, that is, the headrest body 20 cannot be rotated arbitrarily.

[0052] The reset member may be a spring, and the diameter of one end of the spring close to the driving body is larger than the diameter of one end of the spring close to the locking member.

[0053] In addition, the second driving member 41 can drive the motor, and a rack can be provided on the locking member 42. When the headrest body 20 needs to be adjusted, the driving motor rotates forward. At this time, the driving motor will drive the rack to move downward, thereby separating the second locking part and the first locking part. At this time, the headrest body 20 is in a free state, that is, the headrest body 20 can be rotated arbitrarily; when the headrest body 20 is moved into place, the driving motor is reversed. At this time, the driving motor will drive the rack to move upward, thereby locking the second locking part and the first locking part. At this time, the headrest body 20 is in a locked state, that is, the headrest body 20 cannot be rotated arbitrarily.

[0054] Among them, reference Figure 3 As shown, the locking assembly 40 further includes a first transmission member 43, which is disposed between the second driving member 41 and the locking member 42. That is, when the interior dimensions of the bracket 10 are small or the second driving member 41 is large, the second driving member 41 can only be fixed to the outside of the bracket 10. The first transmission member 43 is disposed between the second driving member 41 and the locking member 42 for transmission, thereby enabling transmission between the second driving member 41 and the locking member 42.

[0055] Further, refer to Figure 4As shown, the bracket 10 is provided with an opening 11, and the first transmission member 43 moves in the opening 11. That is, the bracket 10 is provided with the opening 11, so that the opening 11 can provide space for the first transmission member 43 to move in the height direction, so that the second driving member 41 can drive the second transmission member 33 to move in the height direction, and at the same time, the second transmission member 33 can drive the locking member 42 to move in the height direction, so that the second locking portion and the first locking portion can be separated from each other or locked with each other.

[0056] Specifically, the opening 11 extends in the height direction.

[0057] Reference Figure 6 As shown, the second locking portion is provided with a guide slope 421 on one side facing the first locking portion. That is, by providing the guide slope 421 on the second locking portion, it is convenient for the second locking portion and the first locking portion to lock and cooperate when the second locking portion moves toward the first locking portion.

[0058] Reference Figure 5 As shown, the rotating shaft 32 is provided with a first limiting protrusion 321, which is circumferentially arranged on the outer side of the rotating shaft 32. The first limiting protrusion 321 is provided with a plurality of limiting grooves 322 at intervals in the circumferential direction. The limiting grooves 322 constitute a first locking portion. In other words, the first limiting protrusion 321 is provided on the circumference of the rotating shaft 32, that is, the first limiting protrusion 321 protrudes relative to the outer wall of the rotating shaft 32, and the first limiting protrusion 321 is provided with a plurality of limiting grooves 322 at intervals in the circumferential direction. Each of these limiting grooves 322 constitutes an independent first locking portion, that is, the locking member 42 can be locked with any of the limiting grooves 322.

[0059] Therefore, when the headrest body 20 needs to be adjusted, the second driving member 41 drives the locking member 42 to move downward, thereby separating the locking member 42 and the limiting groove 322. At this time, the headrest body 20 is in a free state, that is, the headrest body 20 can be rotated at will; when the headrest body 20 is moved into place, the second driving member 41 drives the locking member 42 to move upward, thereby locking the locking member 42 and the limiting groove 322. At this time, the headrest body 20 is in a locked state, that is, the headrest body 20 cannot be rotated at will.

[0060] And, refer to Figure 4As shown, the bracket 10 is provided with a second limiting protrusion 12, which is arranged toward the first limiting protrusion 321. The first limiting protrusion 321 is provided with an escape groove 323 on one side in the axial direction. The second limiting protrusion 12 and the escape groove 323 selectively abut at both ends in the circumferential direction. Since the headrest body 20 has two extreme positions, namely the deployed position and the stowed position, the headrest body 20 cannot further rotate when in these two positions. Therefore, the escape groove 323 is provided on one side of the first limiting protrusion 321, and the second limiting protrusion 12 slides within the escape groove 323, so that the second limiting protrusion 12 can abut against the escape groove 323 at both ends in the circumferential direction. That is, when the headrest body 20 is rotated to the storage position or the deployment position, the second limiting protrusion 12 can abut against one end of the avoidance groove 323 in the circumferential direction, so that the headrest body 20 cannot continue to rotate, so that the locking member 42 can be locked with the limiting groove 322, thereby facilitating the locking of the headrest body 20.

[0061] And, refer to Figure 3 As shown, the drive assembly 30 further includes a second transmission member 33 and a third transmission member 34. The second transmission member 33 is fixed to the drive member and is in transmission connection with the drive member. The third transmission member 34 is fixed to the rotating shaft 32. The second transmission member 33 and the third transmission member 34 are in transmission connection. That is, by providing the second transmission member 33 and the third transmission member 34, a transmission connection between the first drive member 31 and the rotating shaft 32 can be achieved. Specifically, the second transmission member 33 can be fixed to the drive shaft of the first drive member 31 by a fastener, and the third transmission member 34 can be fixed to the rotating shaft 32 by a fastener. When the first drive member 31 drives the second transmission member 33 to rotate, the second transmission member 33 can drive the third transmission member 34 to rotate, thereby achieving rotation of the rotating shaft 32.

[0062] Among them, reference Figure 1 and Figure 3 As shown, the first drive member 31 extends in the vertical direction. That is, if there is sufficient vertical space but insufficient horizontal space, the first drive member 31 can be configured to extend in the vertical direction, thereby facilitating the placement of the first drive member 31. In this case, the second transmission member 33 and the third transmission member 34 can be bevel gears, thus achieving a transmission connection between the vertically arranged first drive member 31 and the horizontally arranged rotating shaft 32.

[0063] Furthermore, the first driving member 31 extends in the width direction. That is, if there is insufficient vertical space but sufficient horizontal space, the first driving member 31 can be set to extend in the horizontal direction, and the gear drives the rotating shaft 32 or the motor rotating shaft 32 to rotate coaxially with the headrest rotating shaft 32 to achieve the headrest folding.

[0064] Among them, reference Figure 1 and Figure 3 As shown, the drive assembly 30 further includes a vibration damper 44, one end of which is fixed to the bracket 10 and disposed opposite the outer surface of the first drive member 31. Specifically, the vibration damper 44 is disposed on the outer surface of the first drive member 31. This damper 44 reduces the impact between the first drive member 31 and the bracket 10 during operation, thereby reducing noise generated by the headrest assembly 100 during operation. Furthermore, the vibration damper 44 can wrap around the outer surface of the first drive member 31, so that when the first drive member 31 collides with the bracket 10 at any angle, the vibration damper 44 can absorb the vibration generated by the first drive member 31.

[0065] Specifically, the vibration damping member 44 may be a vibration damping rubber or a sound-absorbing rubber pad.

[0066] And, refer to Figure 3 As shown, the headrest assembly 100 also includes a connecting plate 50, which is fixed to the bracket 10. The connecting plate 50 is provided with a through-hole 52, through which the rotating shaft 32 passes. Specifically, the connecting plate 50 allows for assembly of the rotating shaft 32. Specifically, a first mounting hole is provided on the connecting plate 50, and a second mounting hole is provided on the bracket 10. Screws penetrate the first mounting hole and then connect with the second mounting hole, thereby securing the connecting plate 50 to the bracket 10.

[0067] Furthermore, a through hole 52 is provided on the connecting plate 50, through which the rotating shaft 32 can pass. That is, the through hole 52 can be provided to install the rotating shaft 32. Furthermore, a bearing is provided between the rotating shaft 32 and the connecting plate 50, that is, the bearing can facilitate the rotation of the rotating shaft 32 relative to the connecting plate 50.

[0068] Reference Figure 3 As shown, the bracket 10 is provided with one of the positioning posts 13 and the positioning holes 51, and the connecting plate 50 is provided with the other of the positioning posts 13 and the positioning holes 51. The positioning posts 13 and the positioning holes 51 are positioned in a coordinated manner. In other words, when the connecting plate 50 and the bracket 10 are fixedly connected, the positioning posts 13 and the positioning holes 51 can be pre-positioned to facilitate the fixing of the connecting plate 50.

[0069] Specifically, a positioning hole 51 is provided on the connecting plate 50 , and a positioning column 13 is provided on the bracket 10 . The number of the positioning holes 51 and the positioning columns 13 is at least two, which can improve the positioning stability between the bracket 10 and the connecting plate 50 .

[0070] A seat according to a second embodiment of the present invention includes a seat body and a headrest assembly 100. The headrest assembly 100 is disposed on the seat body and is rotatable relative to the seat body. Specifically, the headrest assembly 100 can be rotated relative to the seat body to adjust the headrest assembly 100, i.e., to position the headrest assembly 100 between a stowed position and an extended position.

[0071] Furthermore, the bracket 10 is provided with a connecting flange, that is, the bracket 10 can be connected to the seat body through the connecting flange, so that the bracket 10 can be fixed on the seat body.

[0072] Specifically, a plurality of third mounting holes are provided on the connecting flange, and a plurality of fourth mounting holes are provided on the seat body. Screws or bolts can pass through the third mounting holes and be fixedly connected to the fourth mounting holes, thereby connecting the bracket 10 and the seat body.

[0073] 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.

[0074] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0075] While 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 assembly, characterized in that: include: A bracket, wherein the bracket is provided with a second limiting protrusion; a headrest body, the headrest body being rotatably disposed on the bracket; a drive assembly fixed to the bracket and in transmission connection with the headrest body, the drive assembly comprising: a first drive member and a rotating shaft, the first drive member being fixed to the bracket and in transmission connection with the rotating shaft, the rotating shaft passing through the headrest body and the bracket so that the headrest body can be rotatably disposed on the bracket; The rotating shaft is provided with a first limiting protrusion, which is circumferentially arranged on the outer side of the rotating shaft. The first limiting protrusion is provided with a plurality of limiting grooves at intervals in the circumferential direction and an avoidance groove is provided on one side in the axial direction. The limiting grooves constitute a first locking portion. The rotating shaft is provided with a plurality of first locking portions, and the second limiting protrusion is arranged toward the first limiting protrusion. The second limiting protrusion and the avoidance groove are selectively abutted at both ends in the circumferential direction. A locking assembly is fixed to the bracket and spaced apart from the driving assembly, and the locking assembly includes: a second driving member and a locking member, the second driving member and the locking member are in transmission cooperation and the end of the locking member away from the second driving member is a second locking part, and the second driving member drives the locking member to move in the height direction so that the second locking part and any one of the first locking parts are locked and cooperated.

2. The headrest assembly according to claim 1, characterized in that: The locking assembly further includes a first transmission member, which is arranged between the second driving member and the locking member. An opening is provided on the bracket, and the first transmission member moves in the opening.

3. The headrest assembly according to claim 1, characterized in that: The second driving member includes: a driving body, a driving shaft and a reset member. The driving body and the driving shaft are in transmission connection, and the reset member is arranged between the driving shaft and the driving body.

4. The headrest assembly according to claim 1, characterized in that: A guiding slope is provided on a side of the second locking portion facing the first locking portion.

5. The headrest assembly according to claim 1, characterized in that: Also includes: A second transmission member and a third transmission member, wherein the second transmission member is fixed to the driving member and is in transmission connection with the driving member, and the third transmission member is fixed to the rotating shaft, and the second transmission member and the third transmission member are in transmission connection.

6. The headrest assembly according to claim 1, characterized in that: The first driving member extends in the height direction; or, The first driving member extends in a width direction.

7. The headrest assembly according to claim 1, characterized in that: The driving assembly further includes a vibration damping member, one end of which is fixed to the bracket, and one end of which is arranged opposite to the outer surface of the first driving member.

8. The headrest assembly according to claim 1, characterized in that: Also includes: A connecting plate is fixed to the bracket, and a through hole is provided on the connecting plate, and the rotating shaft passes through the through hole.

9. The headrest assembly according to claim 8, characterized in that: The bracket is provided with one of a positioning column and a positioning hole, and the connecting plate is provided with the other of the positioning column and the positioning hole, and the positioning column and the positioning hole are positioned and matched.

10. A seat, characterized in that: include: seat body; The headrest assembly according to any one of claims 1 to 9 is arranged on the seat body and is rotatable relative to the seat body.

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