Seat headrest facilitating dismantling

Abstract

The application discloses a seat headrest convenient to disassemble, which comprises a pillow on the front side and a back plate on the back side, and the pillow and the back plate are detachably connected through a limiting structure; the limiting structure comprises a hook and a connecting groove; the hook is arranged on one of the pillow and the back plate; the connecting groove is arranged on the other one of the pillow and the back plate; the connecting groove extends along the vertical direction and comprises an avoiding part and a limiting part which are connected in the vertical direction; a buckle plate is arranged on the side wall of the limiting part in the horizontal direction; the buckle plate is configured to separate the limiting part into an L-shaped groove; the hook can slide up and down in the connecting groove; and the hook and the buckle plate are connected through the hook and the buckle plate. The seat headrest convenient to disassemble has the advantages that the pillow and the back plate are detachably arranged; the same back plate can be matched with pillows made of various materials and having various shapes, and the practicability is higher; the back plate is assembled to the pillow by sliding the hook in the connecting groove, the positioning is accurate, and the mounting and dismounting operation between the back plate and the pillow is not only stable but also very convenient.

Description

Technical Field

[0001] This utility model relates to the field of seating technology, specifically to a seat headrest that is easy to disassemble. Background Technology

[0002] A headrest is a common component in seating furniture used to support the human head. It typically consists of a soft pad at the front and a firm back panel, which is connected to the backrest. The soft padding provides a comfortable support experience for the user. In current chairs on the market, the padding and back panel are fixedly connected. After the padding and back panel are manufactured, they are assembled, fixed, and packaged together for shipment. This means that the headrest cannot be disassembled after assembly.

[0003] However, user preferences vary to varying degrees. Some users prefer foam cushions, others leather, and still others mesh. Even within the same material, different consumers may have different color preferences. Currently available headrests do not allow for individual cushion removal and replacement; their designs are fixed, requiring manufacturers to produce separate headrests for different cushion styles, resulting in higher costs. Furthermore, when the cushions become dirty or damaged, the entire headrest must be replaced, which is extremely inconvenient.

[0004] Therefore, how to provide a soft headrest that can be easily attached and detached has become the main problem that needs to be solved. Summary of the Invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a seat headrest that is easy to disassemble, with the headrest pad being able to be removed separately for washing or replacement, and the same back panel being able to accommodate headrest pads of various materials and shapes, thus enhancing its practicality; by setting a limiting structure, the back panel is guided to fit the headrest pad by sliding in the connecting groove with the help of hooks, ensuring precise positioning, and the hooks are inserted into the connecting groove through the avoidance part, and then the hooks are engaged by the buckle plate on the limiting part, making the installation and disassembly operation between the back panel and the headrest pad not only smooth but also very convenient.

[0006] The effect of this utility model is achieved as follows: This application provides a detachable seat headrest, including a front cushion and a rear panel. The cushion and the rear panel are detachably connected by a limiting structure. The limiting structure includes a hook and a connecting groove. The hook is disposed in one of the cushion and the rear panel, and the connecting groove is opened in the other of the cushion and the rear panel. The connecting groove extends vertically and includes a clearance portion and a limiting portion that are connected vertically. A buckle is provided laterally on the side wall of the limiting portion. The buckle is configured to divide the limiting portion into an L-shaped groove. The hook can slide up and down along the connecting groove, and the hook and the buckle engage with each other. When assembling the seat headrest, first install the back panel on the back of the headrest. The hooks are inserted into the connecting groove from the clearance part. Then slide the back panel until the back panel and the headrest are aligned. The hooks slide from the clearance part to the limiting part and engage with the buckle plate, so that the back panel and the headrest are relatively fixed in the horizontal direction.

[0007] Furthermore, the front end of the back panel is provided with at least two symmetrical hooks, and the rear side of the pillow cushion is correspondingly provided with at least two symmetrical connecting grooves. This further enhances the connection strength and stability between the back panel and the pillow cushion.

[0008] Furthermore, the end face of the buckle plate near the clearance part is inclined. This allows the hook to slide from the clearance part into the limiting part, and the hook can engage more smoothly with the buckle plate along the inclined end face, thus making the assembly of the seat headrest more stable and smooth.

[0009] Furthermore, the back panel and the pillow cushion are connected and fixed by screws. The back panel has a through hole, and the back side of the pillow cushion has a corresponding threaded hole. When the back panel is aligned with the pillow cushion and the hook slides into the limiting part, the through hole aligns with the threaded hole, and the screw passes through the through hole and engages with the threaded hole. The installation and fixing operation is simple and has high connection strength.

[0010] Furthermore, a magnetic positioning structure is provided between the headrest and the back panel. This structure includes a magnetic component and a metal component that magnetically attract each other. The magnetic component is located in one of the headrest and the back panel, while the metal component is located in the other. When the back panel is placed behind the headrest, the magnetic component attracts the metal component, allowing the back panel to conform to the headrest. This not only ensures the back panel automatically adheres to the headrest when placed behind it, further simplifying the installation and positioning process, but also provides a stronger sense of damping and enhanced stability during headrest assembly.

[0011] Furthermore, the front side of the rear panel is provided with several metal parts extending vertically, and the rear side of the headrest is provided with several fastening slots, through which the magnetic parts are snapped into the headrest. This further improves the damping feel and stability of the seat headrest assembly operation.

[0012] Of course, in other embodiments of this application, the magnetic component may also be disposed on the back plate, and the metal component may be disposed on the pillow pad accordingly.

[0013] Furthermore, the detachable headrest also includes a backrest connector, which is configured to connect to the backrest and slides vertically to the rear panel. The headrest is height-adjustable, increasing its flexibility and practicality.

[0014] Furthermore, a height adjustment mechanism is provided between the backrest connector and the back panel. This mechanism includes interlocking latches and slots. Multiple slots arranged vertically are recessed on the back panel. The latches are movably connected to the backrest connector via elastic elements. As the backrest connector moves up and down relative to the back panel, the latches sequentially engage with the multiple slots. This ensures that the headrest height adjustment operation is not only highly stable but also very convenient.

[0015] Furthermore, the backrest connector is a split structure, including a detachable adjustment component and a support component. The back panel is sandwiched between the adjustment component and the support component. The back panel has a vertically extending groove formed by cutouts. The support component includes a positioning part that passes through the groove and connects to the adjustment component, allowing the adjustment component and the support component to slide up and down together along the groove. This provides greater stability to the headrest height adjustment operation.

[0016] Furthermore, the backrest connector is a split structure, and a cover plate can be detachably connected to the rear side of the back panel. The front end of the cover plate is recessed to form a clamping groove extending in the vertical direction. The support member is slidably connected to the cover plate through the clamping groove, and the clamping groove is set to run through the left and right sides. The left and right sides of the support member extend beyond the cover plate, which not only further improves the connection strength between the backrest connector and the back panel, but also makes the height adjustment operation of the seat headrest more stable, and makes the seat headrest more integrated and beautiful in appearance.

[0017] This application provides a detachable seat headrest, comprising a removable cushion and a back panel. The cushion can be removed separately for washing or replacement, and the cushion and back panel can be manufactured separately. The same back panel can accommodate cushions of various materials and shapes, enhancing its practicality. By incorporating a limiting structure, the back panel is guided to fit the cushion by sliding within a connecting groove using hooks, ensuring precise positioning. The connecting groove is divided into an L-shaped limiting section and a clearance section. When installing the back panel, simply snap it onto the back of the cushion, allowing the hooks to pass through the clearance section. Then slide the back panel until it aligns with the cushion, allowing the hooks to engage with the limiting section and the snap-on plate, thus positioning the back panel onto the cushion for easy subsequent securing. Conversely, the back panel can also be removed from the cushion. This makes the installation and removal of the back panel and cushion not only smooth but also extremely convenient. Attached Figure Description

[0018] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a three-dimensional structural diagram of the headrest provided in an embodiment of this application; Figure 2 This is a schematic diagram of the back structure of the seat headrest provided in an embodiment of this application; Figure 3 This is a schematic diagram of the connection structure between the pillow and the back panel provided in an embodiment of this application; Figure 4 This is a schematic diagram of the connection structure between the cushion portion and the fixing plate provided in an embodiment of this application; Figure 5 A schematic diagram of the connection structure between the back panel and the backrest connector provided in an embodiment of this application; Figure 6 A schematic diagram of the connection structure between the cover plate and the rear plate provided in an embodiment of this application; Figure 7 A schematic diagram showing the state changes when the rear plate is initially installed on the back side of the pillowcase, as provided in the embodiments of this application. Figure 8 A schematic diagram illustrating the state changes of the rear plate when it slides to align with the pillow cushion, as provided in an embodiment of this application. Figure 9 This is a schematic diagram illustrating the process of raising and lowering the headrest of a seat, as provided in an embodiment of this application.

[0019] The reference numerals in the attached drawings are as follows: 1-pillow pad, 1a-pad part, 1b-fixing plate, 101-avoidance part, 102-limiting part, 103-threaded hole, 110-fastener plate, 120-fastener groove, 2-back plate, 201-through hole, 202-groove, 203-accommodating groove, 210-hook, 220-slot, 230-sliding groove, 3-magnetic component, 4-metal component, 5-adjusting component, 510-clip head, 6-support component, 610-positioning part, 7-cover plate, 701-clamping groove. Detailed Implementation

[0020] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0021] Please refer to the attached document. Figure 1-9 This application provides a detachable seat headrest, including a front cushion 1 and a rear panel 2. The cushion 1 and the rear panel 2 are detachably connected by a limiting structure. The limiting structure includes a hook 210 and a connecting groove. The hook 210 is disposed in one of the cushion 1 and the rear panel 2, and the connecting groove is opened in the other of the cushion 1 and the rear panel 2. The connecting groove extends vertically and includes a clearance portion 101 and a limiting portion 102 that are connected vertically. A buckle plate 110 is horizontally disposed on the side wall of the limiting portion 102. The buckle plate 110 is configured to divide the limiting portion 102 into an L-shaped groove. The hook 210 can slide up and down along the connecting groove, and the hook 210 and the buckle plate 110 engage with each other. When assembling the seat headrest, first install the back panel 2 on the back of the headrest 1. The hook 210 is inserted into the connecting groove from the clearance part 101. Then slide the back panel 2 until the back panel 2 and the headrest 1 are aligned. The hook 210 slides from the clearance part 101 into the limiting part 102 and engages with the buckle plate 110, so that the back panel 2 and the headrest 1 are relatively fixed in the horizontal direction.

[0022] In this embodiment, the seat headrest includes a detachable cushion 1 and a back panel 2. The cushion 1 can be removed separately for washing or replacement, and the cushion 1 and back panel 2 can be manufactured separately. The same back panel 2 can be adapted to cushions 1 of various materials and shapes, enhancing its practicality. By setting a limiting structure, the back panel 2 is slidably guided to fit the cushion 1 in the connecting groove using a hook 210, ensuring precise positioning. The connecting groove is divided into an L-shaped limiting part 102 and an avoidance part 101. When installing the back panel 2, it is only necessary to snap it into the back of the cushion 1, allowing the hook 210 to pass through the avoidance part 101, and then slide the back panel 2 until it aligns with the cushion 1, so that the hook 210 engages with the limiting part 102 and the snap-on plate 110, thus positioning the back panel 2 onto the cushion 1 for easy subsequent fixing operations. Conversely, the back panel 2 can also be removed from the cushion 1. Therefore, the installation and removal operations between the back panel 2 and the cushion 1 are not only smooth but also very convenient.

[0023] The pillow 1 is a split structure, including a soft pad 1a on the front and a fixing plate 1b on the back. The soft pad 1a is made of flexible material to provide comfortable flexible support. It can be made of materials such as leather, mesh, and sponge, and can be selected from a variety of shapes and colors. The fixing plate 1b is a rigid plastic plate that has been injection molded. Hooks 210 or connecting grooves are set on the fixing plate 1b to ensure the overall strength of the pillow 1.

[0024] Please refer to the attached document. Figure 3 In some embodiments of this application, the front end of the back plate 2 is provided with at least two left-right symmetrical hooks 210, and the rear side of the pillow pad 1 is provided with at least two left-right symmetrical connecting grooves.

[0025] In this embodiment, by providing hooks 210 on the rear panel 2, the rear end face of the rear panel 2 exposed behind the headrest is relatively flat after it is assembled to the headrest 1, avoiding the aesthetic impact of slotting. Furthermore, multiple sets of symmetrical hooks 210 and connecting grooves are provided between the rear panel 2 and the headrest 1. The hook heads of the left and right hooks 210 face opposite directions, preventing the hooks 210 from wobbling and disengaging from the connecting grooves, further enhancing the connection strength and stability between the rear panel 2 and the headrest 1.

[0026] Preferably, the front end of the back plate 2 is provided with two sets of hooks 210 that are symmetrically arranged on the left and right, and the rear side of the pillow pad 1 is provided with two sets of connecting grooves that are symmetrically arranged on the left and right.

[0027] Of course, in other embodiments of this application, the hook 210 can be provided on the pillow pad 1, and the connecting groove can be provided on the back plate 2. The number of hooks 210 and connecting grooves between the back plate 2 and the pillow pad 1 can also be one set, three sets, four sets, etc.

[0028] Please refer to the attached document. Figure 7-8 In some embodiments of this application, the end face of the buckle plate 110 near the relief portion 101 is inclined. This allows the hook 210 to slide from the relief portion 101 into the limiting portion 102, so that the hook 210 can more smoothly engage with the buckle plate 110 along the inclined end face of the buckle plate 110, thereby making the assembly operation of the seat headrest more stable and smooth.

[0029] Please refer to the attached document. Figure 3 In some embodiments of this application, the back plate 2 and the pillow 1 are connected and fixed by screws. The back plate 2 has a through hole 201, and the back side of the pillow 1 has a corresponding threaded hole 103. When the back plate 2 is aligned with the pillow 1 and the hook 210 slides into the limiting part 102, the through hole 201 is aligned with the threaded hole 103, and the screw passes through the through hole 201 and engages with the threaded hole 103.

[0030] In this embodiment, after the back plate 2 and the pillow pad 1 are assembled and fixed relative to each other in the horizontal direction by the limiting structure, the back plate 2 can still slide relative to the pillow pad 1 in the vertical direction. Therefore, after the back plate 2 and the pillow pad 1 are aligned, they are connected and fixed by screws, which makes the installation and fixing operation simple and has high connection strength.

[0031] Please refer to the attached document. Figure 3-5 In some embodiments of this application, a magnetic positioning structure is also provided between the pillow pad 1 and the back plate 2. The magnetic positioning structure includes a magnetic suction member 3 and a metal member 4 that magnetically attract each other. The magnetic suction member 3 is provided in one of the pillow pad 1 and the back plate 2, and the metal member 4 is provided in the other of the pillow pad 1 and the back plate 2. When the back plate 2 is placed behind the pillow pad 1, the magnetic suction member 3 attracts the metal member 4, so that the back plate 2 can fit against the pillow pad 1.

[0032] In this embodiment, the magnetic positioning structure not only allows the back plate 2 to automatically adhere to the pillow pad 1 when placed behind it, thus further improving the ease of installation and positioning, but also ensures that the magnetic component 3 holds the metal component 4 in place when the back plate 2 slides to align with the pillow pad 1. This results in greater resistance when the back plate 2 slides, thus providing a stronger damping feel and greater stability during the assembly of the headrest.

[0033] Please refer to the attached document. Figure 3-5 In some embodiments of this application, the front side of the back plate 2 is provided with a plurality of metal parts 4 extending in a vertical direction, and the rear side of the pillow pad 1 is provided with a plurality of fastening grooves 120, and the magnetic fastener 3 is snapped onto the pillow pad 1 through the fastening grooves 120.

[0034] In this embodiment, the metal part 4 extends vertically. That is, during the process of the back plate 2 sliding upward to align with the pillow pad 1, the magnetic part 3 can maintain adsorption and slide relative to the metal part 4, further improving the damping feel and stability of the seat headrest assembly operation.

[0035] Preferably, the front side of the back plate 2 has two symmetrical recesses 202, each containing a metal part 4. The rear side of the pillow cushion 1 has two corresponding magnetic attractors 3. When the magnetic attractors 3 and the metal parts 4 attract each other, the back plate 2 and the pillow cushion 1 are relatively fixed in the left-right direction, further improving positioning accuracy and connection strength. Multiple buckles are provided in the snap-fit ​​groove 120. When the button-shaped magnetic attractor 3 is inserted into the snap-fit ​​groove 120, the multiple buckles engage the magnetic attractor 3, making it difficult for the magnetic attractor 3 to detach from the snap-fit ​​groove 120, resulting in higher connection strength.

[0036] Of course, in other embodiments of this application, the magnetic suction element 3 may also be disposed on the back plate 2, and the metal element 4 may be disposed on the pillow pad 1 accordingly.

[0037] Please refer to the attached document. Figure 9 In some embodiments of this application, the detachable headrest also includes a backrest connector, which is configured to connect to the backrest and is slidably connected to the rear panel 2. With the help of the backrest connector, the rear panel 2 and the headrest 1 as a whole can slide up and down relative to the backrest for adjustment, meaning the headrest can be height-adjusted, increasing the degree of adjustment freedom and improving practicality.

[0038] Please refer to the attached document. Figure 5-6 In some embodiments of this application, a gear adjustment mechanism is provided between the backrest connector and the back panel 2. The gear adjustment mechanism includes a locking head 510 and a locking groove 220 that engage with each other. A plurality of locking grooves 220 arranged in a vertical direction are recessed on the back panel 2. The locking head 510 is movably connected to the backrest connector through an elastic member. When the backrest connector moves up and down relative to the back panel 2, the locking head 510 engages with the plurality of locking grooves 220 in sequence.

[0039] In this embodiment, by setting a height adjustment mechanism between the backrest connector and the back panel 2, the locking head 510 slides between multiple slots 220 when the backrest connector slides, making the height adjustment operation of the headrest highly tactile. Furthermore, after the back panel 2 and the headrest 1 slide to a suitable height, the locking head 510 stably engages with the current slot 220 under the elastic force of the elastic element, allowing the back panel 2 and the headrest 1 to be stably suspended at the current height. That is, when adjusting the height of the headrest, the user only needs to pull the back panel 2 and the headrest 1 up and down to the suitable height and then release. Therefore, the height adjustment operation of the headrest is not only highly stable but also very convenient.

[0040] Preferably, the locking head 510 is a steel ball, and the locking groove 220 is also a corresponding arc-shaped groove, so that when the backrest connector slides relative to the back panel 2, the locking head 510 can smoothly disengage from the current locking groove along the arc surface, thereby making the height adjustment operation of the seat headrest more stable and smooth.

[0041] Please refer to the attached document. Figure 5 Appendix Figure 6 and attached Figure 9 In some embodiments of this application, the backrest connector is a split structure, including an adjustable member 5 and a support member 6 that can be separated from each other. The back plate 2 is sandwiched between the adjustable member 5 and the support member 6. A groove 230 extending in the vertical direction is formed on the back plate 2. The support member 6 includes a positioning part 610, and the positioning part 610 passes through the groove 230 and is connected to the adjustable member 5, so that the adjustable member 5 and the support member 6 can slide up and down together along the groove 230.

[0042] In this embodiment, the back panel 2 is clamped by the adjusting member 5 and the supporting member 6, making the backrest connector and the back panel 2 relatively fixed in the horizontal direction, resulting in higher connection strength. The positioning part 610 not only connects to the adjusting member 5, but also engages and slides up and down along the slide groove 230, which not only facilitates installation and positioning, but also restricts the sliding direction of the adjusting member 5 and the supporting member 6. As a result, the height adjustment operation of the seat headrest has greater stability.

[0043] Preferably, the front side of the rear panel 2 has a recessed groove 203 for accommodating the adjustment member 5. The adjustment member 5 is located within the groove 203 and can slide up and down along it. A locking head 510 and an elastic element are located on the rear side of the adjustment member 5. The bottom of the groove 203 has multiple vertically arranged slots 220. The positioning part 610 and the adjustment member 5 are fixed together by screws, making installation and removal convenient and providing a strong connection. Furthermore, the rear panel 2 has two symmetrical sliding grooves 230, and the support member 6 has two positioning parts 610, further enhancing the connection strength between the backrest connector and the rear panel 2, making the headrest height adjustment operation smoother.

[0044] Please refer to the attached document. Figure 5-6 In some embodiments of this application, the backrest connector is a split structure, and a cover plate 7 is detachably connected to the rear side of the rear plate 2. The front end of the cover plate 7 is recessed to form a clamping groove 701 extending in the vertical direction. The support member 6 is slidably connected to the cover plate 7 through the clamping groove 701, and the clamping groove 701 is arranged to extend through the left and right sides. The left and right sides of the support member 6 extend beyond the cover plate 7. In this embodiment, by setting the cover plate 7 to clamp the support member 6 to the back plate 2, the connection strength between the backrest connector and the back plate 2 is further improved, making the height adjustment operation of the seat headrest more stable. In addition, the connection marks between the support member 6 and the back plate 2 are covered by the cover plate 7, making the seat headrest more integrated and beautiful in appearance. Furthermore, the left and right sides of the support member 6 extend beyond the cover plate 7, which facilitates the connection with the backrest.

[0045] Preferably, the support member 6 is hinged to the backrest, meaning the headrest can also rotate up and down relative to the backrest for adjustment, further enhancing the degree of adjustment freedom and practicality. The cover plate 7 and the rear plate 2 are connected by screws, making the installation and disassembly of the cover plate 7 and the rear plate 2 convenient and ensuring high connection strength.

[0046] It should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used above to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model 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 of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means three or more.

[0047] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A detachable seat headrest, characterized in that, The device includes a front pillow (1) and a rear panel (2). The pillow (1) and the rear panel (2) are detachably connected by a limiting structure. The limiting structure includes a hook (210) and a connecting groove. The hook (210) is disposed in one of the pillow (1) and the rear panel (2). The connecting groove is opened in the other of the pillow (1) and the rear panel (2). The connecting groove extends vertically and includes a clearance part (101) and a limiting part (102) that are connected vertically. A buckle plate (110) is provided horizontally on the side wall of the limiting part (102). The buckle plate (110) is configured to divide the limiting part (102) into an L-shaped groove. The hook (210) can slide up and down along the connecting groove, and the hook (210) and the buckle plate (110) are engaged. When assembling the headrest, first install the back plate (2) on the back side of the pillow (1), and the hook (210) is inserted into the connecting groove from the clearance part (101). Then slide the back plate (2) until the back plate (2) and the pillow (1) are aligned. The hook (210) slides from the clearance part (101) into the limiting part (102) and the hook (210) is engaged with the buckle plate (110), so that the back plate (2) and the pillow (1) are relatively fixed in the horizontal direction.

2. The detachable headrest according to claim 1, characterized in that, The front end of the back plate (2) is provided with at least two left-right symmetrical hooks (210), and the rear side of the pillow (1) is provided with at least two left-right symmetrical connecting grooves.

3. The detachable headrest according to claim 1, characterized in that, The end face of the buckle plate (110) near the avoidance part (101) is inclined.

4. The detachable headrest according to claim 1, characterized in that, The back plate (2) and the pillow (1) are connected and fixed by screws. The back plate (2) has a through hole (201) and the pillow (1) has a corresponding threaded hole (103) on the back side. When the back plate (2) is aligned with the pillow (1) and the hook (210) slides into the limiting part (102), the through hole (201) is aligned with the threaded hole (103), and the screw passes through the through hole (201) and is threaded into the threaded hole (103).

5. The detachable headrest according to claim 1, characterized in that, A magnetic positioning structure is also provided between the pillow (1) and the back plate (2). The magnetic positioning structure includes a magnetic suction element (3) and a metal element (4) that magnetically attract each other. The magnetic suction element (3) is provided in one of the pillow (1) and the back plate (2), and the metal element (4) is provided in the other of the pillow (1) and the back plate (2). When the back plate (2) is placed behind the pillow (1), the magnetic suction element (3) attracts the metal element (4), so that the back plate (2) can fit against the pillow (1).

6. The detachable headrest according to claim 5, characterized in that, The front side of the back plate (2) is provided with a number of metal parts (4) extending in the vertical direction, and the back side of the pillow (1) is provided with a number of fastening grooves (120). The magnetic fastener (3) is snapped onto the pillow (1) through the fastening grooves (120).

7. The detachable headrest according to claim 1, characterized in that, The detachable headrest also includes a backrest connector, which is configured to connect to the backrest and is slidably connected to the rear panel (2).

8. The detachable headrest according to claim 7, characterized in that, A gear adjustment mechanism is provided between the backrest connector and the back panel (2). The gear adjustment mechanism includes a locking head (510) and a locking groove (220) that engage with each other. The back panel (2) has a recessed groove (220) arranged vertically. The locking head (510) is movably connected to the backrest connector through an elastic member. When the backrest connector moves up and down relative to the back panel (2), the locking head (510) engages with the groove (220) in sequence.

9. The detachable headrest according to claim 7, characterized in that, The backrest connector is a split structure, including a detachable adjustment member (5) and a support member (6). The back plate (2) is sandwiched between the adjustment member (5) and the support member (6). The back plate (2) has a slot (230) extending vertically. The support member (6) includes a positioning part (610), which passes through the slot (230) and is connected to the adjustment member (5), so that the adjustment member (5) and the support member (6) can slide up and down together along the slot (230).

10. The detachable headrest according to claim 9, characterized in that, The backrest connector is a split structure. The rear side of the back plate (2) is also detachably connected to a cover plate (7). The front end of the cover plate (7) is recessed to form a clamping groove (701) extending in the vertical direction. The support member (6) is slidably connected to the cover plate (7) through the clamping groove (701). The clamping groove (701) is arranged to pass through the left and right sides. The left and right sides of the support member (6) extend beyond the cover plate (7).

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