Headrest assembly and seat
By using a multi-degree-of-freedom adjustment design for the headrest assembly, the problem of insufficient comfort in existing headrest assemblies is solved, achieving a comfortable support effect in different scenarios.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-19
- Publication Date
- 2026-07-03
AI Technical Summary
Existing headrest components, with their limited degree of adjustment, cannot provide comfortable support for users of different body types and sitting postures, resulting in poor comfort.
The headrest assembly includes a headrest, a movable seat, a connecting seat, and a mounting seat. By setting multiple locking mechanisms, the connecting seat is allowed to swing around a first axis, the movable seat moves in the front-to-back direction, and the connecting part swings around a second axis, achieving three adjustable degrees of freedom to adapt to the usage needs of different scenarios.
The headrest's support surface can be adjusted in multiple directions to ensure a good fit to the user's head, thus improving the comfort of the headrest assembly.
Smart Images
Figure CN224440779U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of seating technology, specifically to a headrest assembly and a seat. Background Technology
[0002] Headrest components are typically mounted on the backrest support of a seat to provide support for the user's head and neck, preventing fatigue caused by the head being unsupported. To accommodate users of different body types and varying sitting postures, existing headrest components usually need to be adjustable, such as adjusting the angle of the headrest support surface to better fit the user's head. While existing headrest components can adapt to different body types and sitting postures by adjusting the angle, their limited adjustability means that in some usage scenarios, they still cannot provide a sufficiently comfortable support posture, resulting in poor comfort. Utility Model Content
[0003] The purpose of this invention is to provide a headrest assembly and a seat to meet the requirements of use in multiple scenarios and improve comfort.
[0004] To achieve the above objectives, the present invention adopts the following technical solution:
[0005] The headrest assembly includes a headrest, a movable seat, a connecting seat, and a mounting seat;
[0006] The connecting seat is pivotally connected to the mounting seat so that the connecting seat can swing relative to the mounting seat about a first horizontally extending axis O1. A first locking mechanism for locking the connecting seat and the mounting seat is provided between the mounting seat and the connecting seat. The movable seat is slidably mounted on the connecting seat so that the movable seat can move relative to the connecting seat in the front-to-back direction. A second locking mechanism for locking the movable seat and the connecting seat is provided between the movable seat and the connecting seat. The headrest includes a support surface located on its front side and a connecting part located on its rear side. The connecting part is pivotally connected to the movable seat so that the connecting part can swing relative to the movable seat about a second horizontally extending axis O2. A third locking mechanism for locking the connecting part and the movable seat is provided between the connecting part and the movable seat.
[0007] Preferably, the first locking mechanism includes a locking member, which includes a mating part, a shaft part, and a locking part located between the mating part and the shaft part. The mating part is synchronously connected to the mounting base and can move relative to the mounting base between a first position and a second position along the first axis O1. The connecting base is rotatably connected to the shaft part to pivotally connect the connecting base to the mounting base. The connecting base is provided with a plurality of positioning parts arranged around the first axis O1. When the mating part is in the first position, the locking part engages with one of the positioning parts to limit the degree of freedom of rotation of the connecting base relative to the shaft part. When the mating part is in the second position, the locking part disengages from the positioning part.
[0008] Preferably, the mounting base is provided with a mating hole extending along the first axis O1, and the mating part is embedded in the mating hole to connect the mating part and the mounting base synchronously and allow the mating part to slide in the extending direction of the mating hole; the connecting base is provided with a shaft hole for the shaft part to pass through, the positioning part is a positioning groove provided on the inner wall of the shaft hole, and the locking part is a protruding tooth that matches the positioning groove.
[0009] Preferably, the mounting base is provided with a bushing, and the mating hole extends from one side of the bushing to the other side. The connecting base is provided with two connecting ears located on both sides of the bushing, and each connecting ear is provided with a shaft hole facing the mating hole, which extends from the inner side to the outer side of the connecting ear. The first locking mechanism includes two locking members and a first elastic member. The mating parts of the two locking members are respectively installed at both ends of the mating hole. The shaft parts of the two locking members pass through the two shaft holes and protrude from the outer side of the two connecting ears. The ends of the shaft parts protruding from the outer side of the connecting ears form a pressing end. The two ends of the first elastic member abut against the two locking members to keep the mating parts of the two locking members in the first position. The pressing end is used to drive the mating parts to move towards the second position when pressed.
[0010] Preferably, the positioning groove extends outward from the inner side of the connecting ear, and the outer end of the positioning groove forms a blind end face. When the mating part is in the first position, the protruding tooth abuts against the blind end face.
[0011] Preferably, the inner wall of the mating hole is provided with a spline groove, the mating part is a spline, the spline is embedded in the spline groove so that the mating part is synchronously connected with the mounting base and the mating part can slide relative to the mounting base along the first axis O1; the locking part includes a plurality of protruding teeth, which are formed from one end of the spline.
[0012] Preferably, the connecting seat is provided with a sliding groove extending from front to back, and the movable seat passes through the sliding groove; one side of the sliding groove is provided with a plurality of slots arranged in the front-back direction; the second locking mechanism includes a locking block and a second elastic member, the locking block is movably mounted on the movable seat, and a locking part protruding from the side of the movable seat is provided thereon, and the second elastic member is used to apply elastic stress to the locking block so that the locking part is locked in one of the slots.
[0013] Preferably, the connecting seat includes an upper shell and a lower shell that is detachably fixed to the upper shell, with a sliding groove located between the upper shell and the lower shell.
[0014] Preferably, the connecting part is provided with a plurality of locking grooves arranged around the second axis O2. The third locking mechanism includes a housing, a third elastic element, and a steel ball. The housing is fixed on the movable seat. The third elastic element and the steel ball are installed inside the housing. The third elastic element is used to apply elastic stress to the steel ball so that a part of the steel ball protrudes out of the housing and is placed in one of the locking grooves.
[0015] Seat, including the headrest assembly described above.
[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0017] In this invention, the support surface of the headrest is used to support the user's head. The headrest can swing relative to the movable seat, the movable seat can move relative to the connecting seat in the front-back direction, and the connecting seat can swing relative to the mounting seat, so that the support surface of the headrest has three adjustable degrees of freedom. When using the headrest assembly in different scenarios, the support surface of the headrest can be adjusted to fit the user's head better, thereby improving the comfort of the headrest assembly. Attached Figure Description
[0018] Figure 1 This is an installation diagram of the present invention;
[0019] Figure 2 This is a schematic diagram of the structure of this utility model;
[0020] Figure 3 for Figure 1 Installation diagram of the middle connector and mounting base;
[0021] Figure 4 This is a schematic diagram of one usage state of the present invention;
[0022] Figure 5 This is a schematic diagram illustrating another usage state of the present invention;
[0023] Figure 6 for Figure 1 Installation diagram of the movable seat and connecting seat;
[0024] Figure 7 for Figure 1 A schematic diagram showing the installation of the movable seat and headrest.
[0025] The components are as follows: 10. Mounting base; 11. Bushing; 12. Mating hole; 13. Spline groove; 20. Connecting seat; 21. Lower shell; 211. Slot; 22. Upper shell; 23. Connecting ear; 24. Shaft hole; 241. Positioning groove; 242. Blind end face; 30. Movable seat; 40. Headrest; 41. Support surface; 42. Connecting part; 43. Locking groove; 50. First locking mechanism; 51. Locking element; 511. Mating part; 512. Locking part; 513. Shaft part; 514. Pressing end; 52. Spring; 60. Second locking mechanism; 61. Locking block; 611. Positioning part; 62. Spring; 70. Third locking mechanism; 71. Housing; 72. Spring; 73. Steel ball. Detailed Implementation
[0026] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments. Unless otherwise specified, the materials and equipment used in this embodiment are all commercially available. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.
[0027] In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In the description of this application, "a plurality of" means two or more, unless otherwise precisely specified.
[0028] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected," "linked," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a connection through an intermediary, or a connection within two elements or an interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0029] like Figure 1 , 2 As shown in Figures 3, 4, 5, 6, and 7, this is the headrest assembly of the present invention, which includes a headrest 40, a movable seat 30, a connecting seat 20, and a mounting seat 10. The mounting seat 10 is connected to the backrest support of the seat. The rear end of the connecting seat 20 is pivotally connected to the top of the mounting seat 10, allowing the connecting seat 20 to swing relative to the mounting seat 10 about a first horizontally extending axis O1, that is, the connecting seat 20 can swing up and down relative to the mounting seat 10 about the first axis O1. A first locking mechanism 50 is provided between the mounting seat 10 and the connecting seat 20. The first locking mechanism 50 is used to lock the connecting seat 20 and the mounting seat 10. By performing relevant operations on the first locking mechanism 50, the first locking mechanism 50 can be released from the connecting seat 20 and the mounting seat 10. Thus, the swing angle of the connecting seat 20 relative to the mounting seat 10 can be adjusted by the first locking mechanism 50.
[0030] The movable seat 30 is slidably mounted on the connecting seat 20, allowing the movable seat 30 to move relative to the connecting seat 20 in the front-back direction. A second locking mechanism 60 is provided between the movable seat 30 and the connecting seat 20. The second locking mechanism 60 is used to lock the movable seat 30 and the connecting seat 20, keeping the movable seat 30 and the connecting seat 20 relatively fixed. By operating the second locking mechanism 60 accordingly, the freedom of the movable seat 30 to move back and forth can be released, so as to realize the adjustment of the front-back position of the movable seat 30.
[0031] The headrest 40 includes a support surface 41 on its front side and a connecting part 42 on its rear side. The shape of the support surface 41 is adapted to the shape of the back of the human head and is used to contact and support the user's head. The connecting part 42 is pivotally connected to the front end of the movable seat 30, so that the connecting part 42 can swing relative to the movable seat 30 about a second axis O2 that extends laterally. That is, the connecting part 42 can drive the headrest 40 to swing up and down relative to the movable seat 30 about the second axis O2. A third locking mechanism 70 is provided between the connecting part 42 and the movable seat 30. The third locking mechanism 70 is used to lock the connecting part 42 and the movable seat 30 together. By performing relevant operations on the third locking mechanism 70, the swing angle of the connecting part 42 relative to the movable seat 30 can be adjusted.
[0032] In this invention, the support surface 41 of the headrest 40 is used to support the user's head. The headrest 40 can swing relative to the movable seat 30, the movable seat 30 can move relative to the connecting seat 20 in the front-back direction, and the connecting seat 20 can swing relative to the mounting seat 10, so that the support surface 41 of the headrest 40 has three adjustable degrees of freedom. When using the headrest assembly in different scenarios, the support surface 41 of the headrest 40 can be adjusted to fit the user's head better, thereby improving the comfort of the headrest assembly.
[0033] In this utility model, the first locking mechanism 50 includes a locking member 51, which is generally columnar in shape and includes a mating part 511, a shaft part 513, and a locking part 512. The locking part 512 is located between the mating part 511 and the shaft part 513. The mating part 511 is synchronously connected to the mounting base 10, and the mating part 511 can move relative to the mounting base 10 along the first axis O1 between a first position and a second position. That is, after the mating part 511 is connected to the mounting base 10, the mating part 511 will not rotate relative to the mounting base 10, but it has a degree of freedom to move relative to the mounting base 10 in the lateral direction. Under the drive of an external force, the mating part 511 can move between the first position and the second position, thereby causing the locking member 51 to move in the lateral direction relative to the mounting base 10 and the connecting base 20.
[0034] The connecting seat 20 is rotatably connected to the shaft portion 513, so that the connecting seat 20 and the mounting seat 10 are pivotally engaged. The connecting seat 20 is provided with a plurality of positioning portions arranged around the first axis O1. The locking portion 512 on the locking member 51 engages with the positioning portions. When the engaging portion 511 is in the first position, the locking portion 512 engages with one of the positioning portions on the connecting seat 20, limiting the degree of freedom of rotation of the connecting seat 20 around the shaft portion 513, and thus limiting the degree of freedom of relative rotation between the connecting seat 20 and the mounting seat 10. When the engaging portion 511 is in the first position, the locking portion 512 engages with one of the positioning portions on the connecting seat 20, limiting the degree of freedom of rotation of the connecting seat 20 around the shaft portion 513, and thus limiting the degree of freedom of relative rotation between the connecting seat 20 and the mounting seat 10. In the second position, the locking part 512 disengages from the positioning part. After disengagement, the locking part 512 and the positioning part no longer restrict the degree of freedom of the connecting seat 20 to rotate around the shaft part 513. By applying an external force to the connecting seat 20, the connecting seat 20 can rotate freely relative to the mounting seat 10, thereby adjusting the angle of the connecting seat 20 swinging relative to the mounting seat 10. After the adjustment is completed, the mating part 511 is moved to the first position, and the locking part 512 engages with the positioning part at the corresponding position, thereby locking the connecting seat 20 and the mounting seat 10.
[0035] The mounting base 10 is provided with a mating hole 12 extending along the first axis O1. The mating part 511 is embedded in the mating hole 12, and the mating part 511 is synchronously connected to the mounting base 10 and can slide in the extending direction of the mating hole 12. For example, the mating part 511 and the mating hole 12 have the same cross-sectional shape, and their cross-sections can be set as square, triangular, elliptical or other non-rotational structures. The connecting seat 20 is provided with a shaft hole 24 for the shaft portion 513 to pass through. The positioning part is a positioning groove 241 provided on the inner wall of the shaft hole 24. The locking part 512 is a protruding tooth that matches the shape of the positioning groove 241. When the mating part 511 is in the first position, the protruding tooth is engaged in one of the positioning grooves 241, so that the connecting seat 20 and the shaft portion 513 are synchronously connected. At the same time, based on the synchronous mating structure of the mating part 511 and the mating hole 12, the locking member 51 is used to synchronously connect the mounting seat 10 and the connecting seat 20, so that the connecting seat 20 is stably mated with the mounting seat 10 when subjected to external force, thereby providing stable support for the headrest 40. When the mating part 511 is in the second position, the protruding tooth disengages from the positioning groove 241, thereby releasing the degree of freedom of relative rotation between the connecting seat 20 and the mounting seat 10.
[0036] A bushing 11 is provided on the top of the mounting base 10. A mating hole 12 extends from one side of the bushing 11 to the other side. Two connecting ears 23 are provided on the connecting base 20. The two connecting ears 23 are arranged opposite each other and are located on both sides of the bushing 11. Each connecting ear 23 is provided with a shaft hole 24 facing the mating hole 12. The shaft hole 24 extends from the inner side to the outer side of the connecting ear 23. The first locking mechanism 50 includes two locking members 51 and a spring 52. The mating part of the two locking members 51 511 are respectively installed at both ends of the mating hole 12. The shaft portion 513 of the two locking members 51 passes through the two shaft holes 24 and protrudes from the outer side of the two connecting ears 23. The end of the shaft portion 513 protruding from the outer side of the connecting ear 23 forms a pressing end 514. The two ends of the spring 52 abut against the two locking members 51 respectively. The elastic stress of the spring 52 pushes the two locking members 51 toward the two connecting ears 23 respectively, so that the mating portion 511 on the two locking members 51 is kept in the first position.
[0037] Specifically, the spring 52 can be placed inside the mating hole 12, with both ends of the spring 52 abutting against the two mating parts 511 that pass through the two ends of the mating hole 12. The pressing end 514 is used to drive the mating parts 511 from the first position to the second position when pressed inward. When it is necessary to adjust the angle of the connecting seat 20, the pressing ends 514 of the two locking members 51 are pressed inward simultaneously, causing the two locking members 51 to move inward simultaneously to compress the spring 52. When the mating parts 511 on the two locking members 51 move to the second position simultaneously, the two locking members 51... The protruding teeth of the locking part 512 on the component 51 disengage from the positioning grooves 241 on the shaft holes 24 of the two connecting ears 23. At this time, the angle of the connecting seat 20 can be adjusted by moving the connecting seat 20 up and down. After the adjustment is completed, the external force on the two pressing ends 514 is released, and the spring 52 pushes the two locking parts 51 to move outward. The mating parts 511 on the two locking parts 51 return to the first position, and the protruding teeth of the locking part 512 are engaged in the corresponding positioning grooves 241, thus relocking the connecting seat 20 and the mounting seat 10. In this way, the connecting seat 20 can be easily adjusted. The positioning groove 241 extends outward from the inner side of the connecting ear 23, and the outer end of the positioning groove 241 forms a blind end face 242. When the mating part 511 is in the first position, the protruding teeth of the locking part 512 abut against the blind end face 242. The blind end face 242 and the protruding teeth cooperate to prevent the locking part 51 from moving outward and disengaging from the shaft hole 24.
[0038] It should be noted that the spring 52 mentioned above can be replaced by other elastic elements such as a spring sheet or an elastic rubber block.
[0039] The inner wall of the aforementioned mating hole 12 is provided with a spline groove 13. The mating part 511 is a spline, which is embedded in the spline groove 13. The mating part 511 is synchronously connected to the mounting base 10 and allows the mating part 511 to slide relative to the mounting base 10 along the first axis O1. The aforementioned locking part 512 includes multiple protruding teeth. It can be that the spline on the mating part 511 extends towards the shaft part 513, and the extended part of the spline forms multiple protruding teeth on the locking part 512. In this way, the structure of the locking member 51 is simplified, making the locking member 51 easier to process and manufacture.
[0040] See Figure 1 and Figure 6 The connecting seat 20 is provided with a sliding groove extending from front to back, and the front end of the sliding groove is provided with an opening. The movable seat 30 passes through the opening of the sliding groove and is inserted into the sliding groove. A plurality of slots 211 arranged in the front-back direction are provided on one side of the sliding groove. The second locking mechanism 60 includes a locking block 61 and a spring 62. The locking block 61 is movably mounted on the movable seat 30 and is provided with a locking part 611 protruding from the side of the movable seat 30. The locking part 611 matches the shape of the slot 211. The spring 62 is used to apply an elastic stress to the locking block 61 so that the locking block 61 always maintains the tendency to move towards the plurality of slots 211, thereby causing the locking part 611 to be locked in one of the slots 211. When adjustment is required, the locking part 611 is moved out of the slot 211 and the movable seat 30 is moved back and forth so that the locking part 611 is re-locked into the corresponding slot 211.
[0041] For ease of installation, the aforementioned connecting base 20 may include an upper shell 22 and a lower shell 21, which are detachably fixed together by bolts, snap-fits, or other means, with a sliding groove positioned between the upper shell 22 and the lower shell 21. It should be noted that the aforementioned spring 62 can be replaced by other elastic elements such as a spring sheet or an elastic rubber block.
[0042] See Figure 7 The headrest 40 has a plurality of locking grooves 43 arranged around the second axis O2 on the connecting part 42. The third locking mechanism 70 includes a housing 71, a spring 72, and a steel ball 73. The housing 71 is fixed to the front end of the movable seat 30. The spring 72 and the steel ball 73 are placed inside the housing 71. The spring 72 applies an elastic stress to the steel ball 73, causing a part of the steel ball 73 to protrude out of the housing 71 and be engaged in one of the locking grooves 43. In this way, the movable seat 30 and the connecting part 42 are locked. When it is necessary to adjust the angle of the headrest 40 relative to the movable seat 30, the headrest 40 is moved, causing the steel ball 73 to be squeezed into the housing 71 and retract into the housing 71. After the headrest 40 is adjusted into place, the elastic stress of the spring 72 causes the steel ball 73 to be engaged in the corresponding locking groove 43. The spring 72 can be replaced by other elastic elements such as a spring sheet or an elastic rubber block.
[0043] The seat of this utility model includes the headrest assembly described above. The other structures of the seat are the same as those in the prior art and will not be described in detail here.
[0044] Finally, it should be noted that the above embodiments are only optional embodiments of this utility model and should not be used to limit the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.
Claims
1. A headrest assembly, characterized by Includes headrest, movable seat, connecting seat, and mounting base; The connecting seat is pivotally connected to the mounting seat so that the connecting seat can swing relative to the mounting seat about a first horizontally extending axis O1. A first locking mechanism for locking the connecting seat and the mounting seat is provided between the mounting seat and the connecting seat. The movable seat is slidably mounted on the connecting seat so that the movable seat can move relative to the connecting seat in the front-to-back direction. A second locking mechanism for locking the movable seat and the connecting seat is provided between the movable seat and the connecting seat. The headrest includes a support surface located on its front side and a connecting part located on its rear side. The connecting part is pivotally connected to the movable seat so that the connecting part can swing relative to the movable seat about a second horizontally extending axis O2. A third locking mechanism for locking the connecting part and the movable seat is provided between the connecting part and the movable seat.
2. The headrest assembly of claim 1, wherein The first locking mechanism includes a locking member, which includes a mating part, a shaft part, and a locking part located between the mating part and the shaft part. The mating part is synchronously connected to the mounting base and can move relative to the mounting base between a first position and a second position along the first axis O1. The connecting base is rotatably connected to the shaft part to pivotally connect the connecting base to the mounting base. The connecting base is provided with a plurality of positioning parts arranged around the first axis O1. When the mating part is in the first position, the locking part engages with one of the positioning parts to limit the degree of freedom of rotation of the connecting base relative to the shaft part. When the mating part is in the second position, the locking part disengages from the positioning part.
3. The headrest assembly of claim 2, wherein The mounting base is provided with a mating hole extending along the first axis O1. The mating part is embedded in the mating hole to connect the mating part and the mounting base synchronously and allow the mating part to slide in the extending direction of the mating hole. The connecting base is provided with a shaft hole for the shaft part to pass through. The positioning part is a positioning groove provided on the inner wall of the shaft hole, and the locking part is a protruding tooth that matches the positioning groove.
4. The headrest assembly of claim 3, wherein A bushing is provided on the mounting base, and a mating hole extends from one side of the bushing to the other side. Two connecting ears are provided on the connecting base, respectively located on both sides of the bushing. Each connecting ear is provided with a shaft hole facing the mating hole, and the shaft hole extends from the inner side to the outer side of the connecting ear. The first locking mechanism includes two locking members and a first elastic member. The mating parts of the two locking members are respectively installed at both ends of the mating hole. The shaft parts of the two locking members pass through the two shaft holes and protrude from the outer side of the two connecting ears. The ends of the shaft parts protruding from the outer side of the connecting ears form a pressing end. The two ends of the first elastic member abut against the two locking members to keep the mating parts of the two locking members in the first position. The pressing end is used to drive the mating parts to move towards the second position when pressed.
5. The headrest assembly of claim 4, wherein, The positioning groove extends outward from the inner side of the connecting ear, and the outer end of the positioning groove forms a blind end face. When the mating part is in the first position, the protruding tooth abuts against the blind end face.
6. The headrest assembly of claim 3, wherein The inner wall of the mating hole is provided with a spline groove, the mating part is a spline, the spline is embedded in the spline groove so that the mating part is synchronously connected with the mounting base and the mating part can slide relative to the mounting base along the first axis O1; the locking part includes multiple protrusions, which are formed from one end of the spline.
7. The headrest assembly of claim 1, wherein, The connecting seat is provided with a sliding groove extending from front to back, and the movable seat passes through the sliding groove; one side of the sliding groove is provided with multiple slots arranged in the front-back direction; the second locking mechanism includes a locking block and a second elastic member. The locking block is movably mounted on the movable seat and is provided with a locking part protruding from the side of the movable seat. The second elastic member is used to apply elastic stress to the locking block so that the locking part is locked in one of the slots.
8. The headrest assembly of claim 7, wherein, The connector includes an upper shell and a lower shell that is detachably fixed to the upper shell, with a sliding groove located between the upper and lower shells.
9. The headrest assembly of claim 1, wherein, The connecting part is provided with multiple locking grooves arranged around the second axis O2. The third locking mechanism includes a housing, a third elastic element, and a steel ball. The housing is fixed on the movable seat. The third elastic element and the steel ball are installed inside the housing. The third elastic element is used to apply elastic stress to the steel ball so that a part of the steel ball protrudes out of the housing and is placed in one of the locking grooves.
10. A seat, characterized by Includes the headrest assembly as described in any one of claims 1-9.