Headrest and ergonomic chair

Abstract

The utility model discloses a headrest and an ergonomic chair. The headrest comprises a headrest frame assembly, a headrest cushion assembly and a backrest assembly, one end of the support assembly is connected with the headrest frame assembly, and a plurality of sliding parts are arranged on the lower side face of the other end of the support assembly; the lifting assembly is suitable for being connected with a chair back, the lifting assembly is provided with a connecting plate, the connecting plate is supported on the lower side of the support assembly, the connecting plate is provided with a plurality of guide grooves, the guide grooves extend in the length direction of the connecting plate, and the guide grooves are distributed in the length direction and / or the width direction of the connecting plate; the multiple sliding parts are connected into the multiple guide grooves in a one-to-one correspondence mode. The connection stability of the support assembly and the lifting assembly of the headrest is higher, and the headrest has the advantages of being reliable in connection, high in adjusting stability, convenient to assemble and the like.

Description

Technical Field

[0001] This utility model relates to the field of seating technology, and in particular to a headrest and an ergonomic chair. Background Technology

[0002] Headrests in related technologies typically include a headrest frame assembly, a support assembly, and a lifting assembly. The lifting assembly connects to the chair back, and the headrest frame assembly connects to the lifting assembly via the support assembly. The support assembly can move relative to the lifting assembly in the fore-and-aft direction, thereby adjusting the fore-and-aft position of the headrest frame assembly. When a user's head presses against the headrest, the headrest frame assembly can move backward with the user's head to provide better head support.

[0003] However, due to the unreasonable structural design of the headrest in the relevant technology, the connection stability between the support assembly and the lifting assembly is poor, the stability of the support assembly relative to the lifting assembly in the front-back direction is low, and the adjustment effect of the headrest frame assembly in the front-back direction is poor. Utility Model Content

[0004] This utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of this utility model is to provide a headrest whose support assembly and lifting assembly have higher connection stability, and which has advantages such as reliable connection, high adjustment stability, and ease of assembly.

[0005] This utility model embodiment also proposes an ergonomic chair with the above-mentioned headrest.

[0006] To achieve the above objectives, a headrest is provided according to a first aspect of the present invention, comprising: a headrest frame assembly; a support assembly, one end of which is connected to the headrest frame assembly, and the lower side of the other end of the support assembly is provided with a plurality of sliding portions; and a lifting assembly adapted to be connected to a chair back, wherein the lifting assembly is provided with a connecting plate, the connecting plate is supported on the lower side of the support assembly, and the connecting plate is provided with a plurality of guide grooves, the guide grooves extending along the length direction of the connecting plate, and the plurality of guide grooves being arranged along the length direction and / or width direction of the connecting plate, and the plurality of sliding portions being connected one-to-one in the plurality of guide grooves.

[0007] Therefore, the headrest support assembly and lifting assembly of the present utility model embodiment have higher connection stability and have the advantages of reliable connection, high adjustment stability and easy assembly.

[0008] According to some embodiments of the present invention, the bracket assembly includes: a support bracket connected to the headrest frame assembly, and the support bracket having a plurality of sliding portions; and a plurality of limiting members that stop on the side of the connecting plate opposite to the support bracket, and the plurality of limiting members being connected to the plurality of sliding portions one by one.

[0009] According to some embodiments of the present invention, the sliding part is cylindrical, and the limiting member and the sliding part are connected by fasteners.

[0010] According to some embodiments of the present invention, the connecting plate is further provided with a clearance groove on the side facing away from the support bracket, the guide groove is constructed at the bottom of the clearance groove, and the width of the clearance groove is greater than the width of the guide groove, and the limiting member is provided in the clearance groove.

[0011] According to some embodiments of the present invention, the plurality of guide grooves include: a plurality of first guide grooves, the plurality of first guide grooves being arranged at intervals along the width direction of the connecting plate; and a plurality of second guide grooves, the plurality of second guide grooves being arranged at intervals along the width direction of the connecting plate, and the second guide grooves and the first guide grooves being arranged at intervals along the length direction of the connecting plate.

[0012] According to some embodiments of the present invention, the first guide groove and the second guide groove are respectively adjacent to the two ends of the connecting plate in the length direction.

[0013] According to some embodiments of the present invention, the headrest further includes an elastic element, which is connected to the connecting plate and the support assembly respectively to generate an elastic force that drives the support assembly to move forward relative to the connecting plate.

[0014] According to some embodiments of the present invention, the elastic element is disposed between the rear side of the connecting plate and the rear side of the bracket assembly to stretch the elastic element when the bracket assembly moves rearward relative to the connecting plate; and / or, the elastic element is disposed between the front side of the connecting plate and the front side of the bracket assembly to compress the elastic element when the bracket assembly moves rearward relative to the connecting plate.

[0015] According to some embodiments of the present invention, the lifting assembly further includes: a lifting bracket, the connecting plate being connected to the upper side of the lifting bracket, and the lifting bracket being provided with a lifting slide rail extending in the vertical direction; and a connector for connecting to the chair back, and the connector being slidably connected to the lifting slide rail.

[0016] According to a second aspect of the present invention, an ergonomic chair is provided, characterized in that it includes: a chair back; and a headrest according to a first aspect of the present invention, the headrest being connected to the chair back.

[0017] According to the second aspect of the present invention, the ergonomic chair utilizes the headrest described in the first aspect of the present invention, resulting in higher connection stability between the headrest support assembly and the lifting assembly, and offering advantages such as reliable connection, high adjustment stability, and ease of assembly.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is a schematic diagram of the headrest according to an embodiment of the present utility model;

[0021] Figure 2 This is a structural schematic diagram of the headrest according to another perspective of an embodiment of the present utility model;

[0022] Figure 3 This is an exploded view of the headrest structure according to an embodiment of the present utility model;

[0023] Figure 4 This is a structural schematic diagram of the connecting plate according to an embodiment of the present utility model.

[0024] Figure label:

[0025] 1. Headrest;

[0026] 100. Headrest frame assembly;

[0027] 200. Bracket assembly; 210. Support bracket; 211. Sliding part; 220. Limiting component;

[0028] 300. Lifting assembly; 310. Connecting plate; 311. Guide groove; 312. Clearance groove; 313. First guide groove; 314. Second guide groove; 320. Lifting bracket; 321. Lifting slide; 330. Adapter;

[0029] 400. Elastic components. Detailed Implementation

[0030] The embodiments of this utility model are described in detail below. Examples of these 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 utility model, and should not be construed as limiting this utility model.

[0031] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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.

[0032] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.

[0033] In the description of this utility model, "multiple" means two or more, and "several" means one or more.

[0034] The headrest according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0035] like Figures 1-4 As shown in the attached diagram, the up-down direction is the up-down direction (height direction) of the headrest 1, which is also the up-down direction of the ergonomic chair; the front-back direction is the front-back direction of the headrest 1, which is also the front-back direction of the ergonomic chair; and the left-right direction is the left-right direction (length direction) of the headrest 1, which is also the left-right direction of the ergonomic chair.

[0036] According to an embodiment of the present utility model, the headrest 1 includes a headrest frame assembly 100, a support assembly 200, and a lifting assembly 300.

[0037] One end of the support assembly 200 is connected to the headrest frame assembly 100, and the lower side of the other end of the support assembly 200 is provided with a plurality of sliding parts 211. The lifting assembly 300 is adapted to be connected to the chair back, and the lifting assembly 300 is provided with a connecting plate 310. The connecting plate 310 is supported on the lower side of the support assembly 200 and is provided with a plurality of guide grooves 311. The guide grooves 311 extend along the length direction of the connecting plate 310, and the plurality of guide grooves 311 are arranged along the length direction and / or width direction of the connecting plate 310. The plurality of sliding parts 211 are connected one-to-one in the plurality of guide grooves 311.

[0038] The arrangement of multiple guide grooves 311 along the length and / or width of the connecting plate 310 means that the multiple guide grooves 311 can be arranged along the length of the connecting plate 310, or the multiple guide grooves 311 can be arranged along the width of the connecting plate 310, or the multiple guide grooves 311 can be arranged in multiple rows and columns along the length and width of the connecting plate 310.

[0039] In addition, the guide groove 311 extends along the length direction of the connecting plate 310, wherein the length direction of the connecting plate 310 extends in the front-back direction, that is, the guide groove 311 extends in the front-back direction.

[0040] The bracket assembly 200 can be located on the rear side of the headrest frame assembly 100, and the left and right sides of the front end of the bracket assembly 200 can be rotatably connected to the left and right sides of the headrest frame assembly 100 respectively, while the lifting assembly 300 can be connected to the lower side of the rear end of the bracket assembly 200.

[0041] According to the embodiment of the present utility model, the headrest 1 is connected by connecting the support assembly 200 to the headrest frame assembly 100 and the lifting assembly 300 to the chair back. That is, the headrest frame assembly 100 can be connected to the chair back through the support assembly 200 and the lifting assembly 300, and the height of the headrest frame assembly 100 relative to the chair back can be adjusted by using the lifting bracket 320.

[0042] In addition, the support assembly 200 is provided with a sliding part 211, and the connecting plate 310 is provided with a guide groove 311. The sliding part 211 is slidably connected to the guide groove 311, that is, the sliding part 211 can move relative to the connecting plate 310 in the front-back direction within the guide groove 311, thereby realizing the position adjustment of the headrest frame assembly 100 in the front-back direction. Thus, when the user's head presses against the headrest 1, the headrest frame assembly 100 can move backward with the user's head to adjust the position of the headrest frame assembly 100 in the front-back direction, thereby improving the fit between the headrest 1 and the user's head, so that the headrest 1 can better support the user's head.

[0043] Furthermore, the sliding part 211 is located on the lower side of the bracket assembly 200. When the bracket assembly 200 is assembled and connected with the lifting assembly 300, the sliding part 211 can be inserted into the guide groove 311 of the connecting plate 310 from top to bottom. This not only simplifies the assembly structure and makes assembly easier, but also allows the bracket assembly 200 to cover the guide groove 311 and the sliding part 211 after the sliding part 211 is inserted into the guide groove 311. That is, the guide groove 311 and the sliding part 211 are not visible from above, thus eliminating the need for additional decorative parts such as cover plates to cover the guide groove 311 and the sliding part 211. This further simplifies the structure of the headrest 1 and makes it more aesthetically pleasing.

[0044] Furthermore, multiple sliding parts 211 and multiple guide grooves 311 are provided and arranged along the length and / or width direction of the connecting plate 310. The multiple sliding parts 211 are connected one-to-one within the multiple guide grooves 311. This arrangement not only increases the contact area between the connecting plate 310 and the support assembly 200, allowing the lifting assembly 300 to support the support assembly 200 more stably, but also ensures that the multiple sliding parts 211 cooperate with the multiple guide grooves 311 simultaneously. When the support assembly 200 slides relative to the connecting plate 310, the connecting plate 310 can stably fix the support assembly 200 in both the length and width directions. This prevents the support assembly 200 from tilting or swaying back and forth or left and right relative to the connecting plate 310. The cooperation between the support assembly 200 and the connecting plate 310 is more stable, further improving the stability of the headrest frame assembly 100 in the front-back direction adjustment and resulting in a better adjustment effect.

[0045] Thus, the connection stability between the support assembly 200 and the lifting assembly 300 of the headrest 1 according to the present utility model embodiment is higher, and it has the advantages of reliable connection, high adjustment stability and easy assembly.

[0046] In some specific embodiments of this utility model, such as Figure 2 and Figure 3 As shown, the bracket assembly 200 includes a support bracket 210 and multiple limiting members 220.

[0047] The support bracket 210 is connected to the headrest frame assembly 100, and the support bracket 210 has multiple sliding parts 211. The limiting member 220 stops on the side of the connecting plate 310 facing away from the support bracket 210, and the multiple limiting members 220 are connected to the multiple sliding parts 211 one by one.

[0048] For example, the left and right sides of the front end of the support bracket 210 can be connected to the left and right sides of the headrest frame assembly 100, respectively. This increases the stability of the connection between the headrest frame assembly 100 and the support bracket 210, thereby preventing the headrest frame assembly 100 from wobbling relative to the bracket assembly 200 in the left and right directions. The load-bearing force on the headrest frame assembly 100 and the support bracket 210 can be more evenly distributed. While reducing the wobbling of the headrest frame assembly 100 relative to the bracket assembly 200, it can also effectively prevent the headrest frame assembly 100 and the support bracket 210 from wobbling.

[0049] Damage to the connection structure of the frame assembly 200 can extend the service life of the headrest 1.

[0050] The limiting member 220 can be detachably connected to the sliding part 211 by fasteners. This arrangement facilitates the sliding part 211 to extend into the guide groove 311. After the sliding part 211 is installed in place, the limiting member 220 can be connected to the free end of the sliding part 211 and stop on the side of the connecting plate 310 facing away from the support bracket 210. This prevents the sliding part 211 from detaching from the guide groove 311, thereby ensuring that the sliding part 211 slides stably in the guide groove 311. This is beneficial to improving the coordination stability between the bracket assembly 200 and the lifting assembly 300.

[0051] Furthermore, such as Figure 3 As shown, the sliding part 211 is cylindrical, and the limiting member 220 and the sliding part 211 are connected by fasteners.

[0052] For example, the end of the sliding part 211 may be provided with a connecting hole, and the limiting member 220 may also be provided with a connecting hole. The fastener can be smoothly inserted into the connecting hole on the limiting member 220 and the connecting hole of the sliding part 211 to stably connect the sliding part 211 and the limiting member 220.

[0053] Furthermore, by setting the sliding part 211 to a cylindrical shape, the contact area between the sliding part 211 and the side wall of the guide groove 311 can be reduced, thereby reducing the friction between the sliding part 211 and the connecting plate 310, so that the sliding part 211 can slide more easily in the guide groove 311, which facilitates the front and back adjustment of the headrest 1.

[0054] In some specific embodiments of this utility model, such as Figure 4 As shown, the connecting plate 310 is also provided with a relief groove 312 on the side facing away from the support bracket 210. The guide groove 311 is constructed at the bottom of the relief groove 312, and the width of the relief groove 312 is greater than the width of the guide groove 311. The limiting member 220 is provided in the relief groove 312.

[0055] In other words, the clearance groove 312 can be constructed on the lower side of the connecting plate 310, wherein the width of the limiting member 220 can be greater than the width of the guide groove 311, so that the limiting member 220 can be engaged in the clearance groove 312, thereby preventing the sliding part 211 from disengaging from the guide groove 311, so that the sliding part 211 can slide stably in the guide groove 311.

[0056] Furthermore, by setting the clearance groove 312, the limiting member 220 can be set inside the clearance groove 312, so that the lower end face of the limiting member 220 can be flush with the lower end face of the connecting plate 310, so that the appearance of the connecting plate 310 and the limiting member 220 after assembly is more regular and beautiful, and easier to arrange.

[0057] In some embodiments, the outer peripheral surface of the limiting member 220 may be covered with an elastic material, such as rubber. This arrangement allows the sliding part 211 to slide forward or backward along the guide groove 311 to its limit position, so that the limiting member 220 can abut against the front or rear sidewall of the clearance groove 312. This can prevent the sliding part 211 from directly colliding with the front or rear sidewall of the guide groove 311, thereby using the elastic material of the outer peripheral surface of the limiting member 220 for buffering and vibration reduction, and reducing collision noise.

[0058] In some specific embodiments of this utility model, such as Figure 4 As shown, the multiple guide grooves 311 include multiple first guide grooves 313 and multiple second guide grooves 314.

[0059] Multiple first guide grooves 313 are arranged at intervals along the width direction of the connecting plate 310, and multiple second guide grooves 314 are arranged at intervals along the width direction of the connecting plate 310, and the second guide grooves 314 and the first guide grooves 313 are arranged at intervals along the length direction of the connecting plate 310.

[0060] For example, the first guide groove 313 may be adjacent to the front side of the connecting plate 310, and the second guide groove 314 may be adjacent to the rear side of the connecting plate 310.

[0061] This design helps improve the connection stability between the connecting plate 310 and the bracket assembly 200. When the bracket assembly 200 slides relative to the connecting plate 310, the connecting plate 310 can stably fix the bracket assembly 200 in both the length and width directions. This prevents the bracket assembly 200 from tilting or swaying relative to the connecting plate 310. The cooperation between the bracket assembly 200 and the connecting plate 310 is more stable, further improving the stability of the headrest frame assembly 100 in the front-to-back direction adjustment and resulting in a better adjustment effect.

[0062] Meanwhile, by having multiple sliding parts 211 respectively engage with multiple first guide grooves 313 and multiple second guide grooves 314, wear on individual sliding parts 211 and individual guide grooves 311 can be reduced, so that the bracket assembly 200 can maintain a stable engagement with the connecting plate 310 for a long time.

[0063] Specifically, such as Figure 3 and Figure 4 As shown, the first guide groove 313 and the second guide groove 314 are respectively adjacent to the two ends of the connecting plate 310 in the length direction.

[0064] In addition, a plurality of first guide grooves 313 may be located adjacent to both sides of the width direction of the connecting plate 310, and a plurality of second guide grooves 314 may also be located adjacent to both sides of the width direction of the connecting plate 310.

[0065] With this configuration, the connection positions of the connecting plate 310 and the bracket assembly 200 can be close to both ends of the connecting plate 310 in the length and width directions, making it less likely for the bracket assembly 200 to tilt to one side, which helps to improve the connection stability of the connecting plate 310 and the bracket assembly 200.

[0066] In some specific embodiments of this utility model, such as Figure 3 As shown, the headrest 1 also includes an elastic element 400.

[0067] The elastic element 400 is connected to the connecting plate 310 and the bracket assembly 200 respectively to generate an elastic force that drives the bracket assembly 200 to move forward relative to the connecting plate 310.

[0068] For example, the elastic element 400 can be a spring. When the seat is not in use, that is, when the headrest 1 is not under pressure, the bracket assembly 200 will not slide relative to the connecting plate 310 in the front-back direction. At this time, the elastic element 400 is in its initial state and remains balanced.

[0069] Specifically, when the user's head presses backward against the headrest 1, the support assembly 200 can move backward relative to the connecting plate 310. At this time, the elastic element 400 can be compressed or stretched to generate elastic force. When the user's head moves forward, the elastic element 400 can push the support assembly 200 and the headrest frame assembly 100 forward relative to the connecting plate 310, so that the headrest 1 can adaptively adjust according to the front and back position of the user's head, resulting in better support. Furthermore, when the user's head completely leaves the headrest 1, the elastic element 400 can push the support assembly 200 and the headrest frame assembly 100 forward to return to their initial state.

[0070] In some specific embodiments of this utility model, such as Figure 3 As shown, the elastic element 400 is disposed between the rear side of the connecting plate 310 and the rear side of the bracket assembly 200 to stretch the elastic element 400 when the bracket assembly 200 moves rearward relative to the connecting plate 310.

[0071] Thus, when the user's head presses against the headrest 1, the headrest frame assembly 100 and the support assembly 200 move backward relative to the lifting assembly 300. At this time, the elastic element 400 is stretched, so that the elastic element 400 can generate an elastic restoring force to drive the support assembly 200 to move forward relative to the connecting plate 310. In this way, when the user's head moves forward, the elastic element 400 can drive the support assembly 200 and the headrest frame assembly 100 to adaptively adjust in the front-back direction according to the position of the user's head. And after the user's head has completely left the headrest 1, the elastic force of the elastic element 400 can drive the support assembly 200 and the headrest frame assembly 100 to move forward relative to the connecting plate 310 and return to their original position.

[0072] In some other embodiments of the present invention, the elastic member 400 is disposed between the front side of the connecting plate 310 and the front side of the bracket assembly 200, so as to compress the elastic member 400 when the bracket assembly 200 moves backward relative to the connecting plate 310.

[0073] Thus, when the user's head presses against the headrest 1, the headrest frame assembly 100 and the support assembly 200 move backward relative to the lifting assembly 300. At this time, the elastic element 400 is compressed, so that the elastic element 400 can generate an elastic restoring force to drive the support assembly 200 to move forward relative to the connecting plate 310. In this way, when the user's head moves forward, the elastic element 400 can drive the support assembly 200 and the headrest frame assembly 100 to adaptively adjust in the front-back direction according to the position of the user's head. And after the user's head has completely left the headrest 1, the elastic force of the elastic element 400 can drive the support assembly 200 and the headrest frame assembly 100 to move forward relative to the connecting plate 310 and return to their original position.

[0074] In addition, multiple elastic elements 400 can be provided, and the multiple elastic elements 400 can be connected to the front and rear sides of the connecting plate 310 and the bracket assembly 200 respectively. In this way, the headrest frame assembly 100 and the bracket assembly 200 can be driven to move forward relative to the connecting plate 310 through multiple elastic elements 400, which helps to improve the stability of the headrest 1's adaptive adjustment and achieve a better adjustment effect.

[0075] In some specific embodiments of this utility model, such as Figure 2 and Figure 3 As shown, the lifting assembly 300 also includes a lifting bracket 320 and an adapter 330.

[0076] The connecting plate 310 is connected to the upper side of the lifting bracket 320, and the lifting bracket 320 is provided with a lifting slide 321, which extends in the vertical direction. The adapter 330 is used to connect with the chair back and is slidably connected to the lifting slide 321. Thus, the height of the headrest 1 relative to the chair back can be adjusted by sliding the adapter 330 up and down along the lifting slide 321, thereby achieving height adjustment of the headrest 1 and making the seat suitable for different users.

[0077] The following description, with reference to the accompanying drawings, describes an ergonomic chair according to an embodiment of the present invention.

[0078] The ergonomic chair includes a backrest and a headrest 1 according to the above embodiment of the present invention, the headrest 1 being connected to the backrest.

[0079] The ergonomic chair according to the embodiment of the present invention, by utilizing the headrest 1 according to the above embodiment of the present invention, has higher connection stability between the support assembly 200 and the lifting assembly 300 of the headrest 1, and has the advantages of reliable connection, high adjustment stability and easy assembly.

[0080] The other components and operation of the headrest 1 and the ergonomic chair according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0081] In the description of this specification, references to terms such as "specific embodiment" and "specific example" refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example that 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.

[0082] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A headrest (1), characterized in that, include: Headrest frame assembly (100); A support assembly (200) is provided with a plurality of sliding parts (211) on the lower side of the other end of the support assembly (200) connected to the headrest frame assembly (100). A lifting assembly (300) is adapted to be connected to the backrest of a chair, and the lifting assembly (300) is provided with a connecting plate (310). The connecting plate (310) is supported on the lower side of the bracket assembly (200), and the connecting plate (310) is provided with a plurality of guide grooves (311). The guide grooves (311) extend along the length direction of the connecting plate (310), and the plurality of guide grooves (311) are arranged along the length direction and / or width direction of the connecting plate (310). A plurality of sliding parts (211) are connected one-to-one in the plurality of guide grooves (311).

2. The headrest (1) according to claim 1, characterized in that, The support assembly (200) includes: A support bracket (210) is connected to the headrest frame assembly (100), and the support bracket (210) forms a plurality of the sliding portions (211). Multiple limiting members (220) are provided, which stop on the side of the connecting plate (310) facing away from the support bracket (210), and the multiple limiting members (220) are connected to the multiple sliding parts (211) in a one-to-one correspondence.

3. The headrest (1) according to claim 2, characterized in that, The sliding part (211) is cylindrical, and the limiting member (220) and the sliding part (211) are connected by fasteners.

4. The headrest (1) according to claim 2, characterized in that, The connecting plate (310) is provided with a relief groove (312) on the side facing away from the support bracket (210). The guide groove (311) is constructed at the bottom of the relief groove (312), and the width of the relief groove (312) is greater than the width of the guide groove (311). The limiting member (220) is provided in the relief groove (312).

5. The headrest (1) according to claim 1, characterized in that, The plurality of guide grooves (311) include: A plurality of first guide grooves (313) are arranged at intervals along the width direction of the connecting plate (310); A plurality of second guide grooves (314) are arranged at intervals along the width direction of the connecting plate (310), and the second guide grooves (314) and the first guide grooves (313) are arranged at intervals along the length direction of the connecting plate (310).

6. The headrest (1) according to claim 5, characterized in that, The first guide groove (313) and the second guide groove (314) are respectively adjacent to the two ends of the connecting plate (310) in the length direction.

7. The headrest (1) according to claim 1, characterized in that, Also includes: An elastic element (400) is connected to the connecting plate (310) and the support assembly (200) respectively to generate an elastic force that drives the support assembly (200) to move forward relative to the connecting plate (310).

8. The headrest (1) according to claim 7, characterized in that, The elastic element (400) is disposed between the rear side of the connecting plate (310) and the rear side of the bracket assembly (200) to stretch the elastic element (400) when the bracket assembly (200) moves rearward relative to the connecting plate (310); and / or, The elastic element (400) is disposed between the front side of the connecting plate (310) and the front side of the bracket assembly (200) to compress the elastic element (400) when the bracket assembly (200) moves rearward relative to the connecting plate (310).

9. The headrest (1) according to any one of claims 1-8, characterized in that, The lifting assembly (300) also includes: A lifting bracket (320) is provided, wherein the connecting plate (310) is connected to the upper side of the lifting bracket (320), and the lifting bracket (320) is provided with a lifting slide (321), which extends in the vertical direction; A connector (330) is used to connect to the chair back and is slidably connected to the lifting slide (321).

10. An ergonomic chair, characterized in that, include: Chair back; The headrest (1) according to any one of claims 1-9 is connected to the chair back.

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