Headrest and ergonomic chair

Abstract

The utility model discloses a headrest and an ergonomic chair, and the headrest comprises a headrest frame which is provided with a lifting chute extending along the height direction; the headrest support is suitable for being connected with the chair back and comprises a sliding part and a supporting support, the first end of the sliding part is rotatably connected with the supporting support, and the second end of the sliding part is slidably connected into the lifting sliding groove; the first elastic piece is arranged between the second end of the sliding piece and the headrest frame and used for providing elastic force for driving the headrest frame to slide upwards relative to the headrest support; the gear rotating mechanism is arranged at the rotating connection position between the sliding part and the supporting bracket, the gear rotating mechanism comprises a plurality of tooth grooves and elastic tooth columns, the tooth grooves are formed in one of the sliding part and the supporting bracket, the tooth columns are arranged on the other one of the sliding part and the supporting bracket, and the elastic tooth columns are clamped into the tooth grooves. The gear rotating mechanism is arranged at the rotating joint of the sliding part and the supporting bracket, so that the headrest frame can be effectively ensured to have a relatively stable posture after sliding to a proper position, and the supporting effect is better.

Description

Technical Field

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

[0002] In related technologies, headrests typically include a headrest frame and a headrest support. The headrest support is used to connect to the chair back, and the headrest frame is vertically connected to the headrest support. When the user's head presses against the headrest, the headrest frame can move downwards with the user's head to adjust the height of the headrest frame, thereby providing better support for the user's head.

[0003] However, due to the unreasonable structural design of the headrest in the relevant technology, not only is the sensitivity of the headrest frame in the vertical direction low, but the stability of the adjustment is also poor, resulting in a poor user experience. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide a headrest with a stop rotation mechanism at the rotatable connection between the sliding member and the support bracket, which can effectively ensure that the headrest frame has a relatively stable posture after sliding to a suitable position, resulting in better support.

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

[0006] A headrest according to a first aspect of the present invention includes: a headrest frame having a lifting groove extending along the height direction; a headrest bracket adapted to be connected to a chair back, the headrest bracket including: a sliding member and a support bracket, a first end of the sliding member being rotatably connected to the support bracket, and a second end being slidably connected to the lifting groove; a first elastic member disposed between the second end of the sliding member and the headrest frame, the first elastic member being used to provide an elastic force driving the headrest frame to slide upward relative to the headrest bracket; and a gear shifting mechanism disposed at the rotational connection between the sliding member and the support bracket, the gear shifting mechanism including a plurality of toothed grooves and an elastic toothed post, one of the sliding member and the support bracket being provided with a plurality of the toothed grooves, and the other of the sliding member and the support bracket being provided with the elastic toothed post, the elastic toothed post being engaged in the toothed grooves.

[0007] According to the headrest of this utility model embodiment, a gear rotation mechanism is set at the rotatable connection between the slider and the support bracket. When the human head leans against the headrest, the first elastic member can be compressed or stretched to generate elastic force, causing the slider to rotate downward or upward under the elastic force of the first elastic member. When the headrest frame slides to a suitable position that conforms to the human head, the first elastic member no longer deforms. At this time, the elastic tooth column of the gear rotation mechanism is engaged in a certain tooth groove, so that the slider and the support bracket no longer rotate. Based on the adaptive adjustment of the headrest, it can effectively ensure that the headrest frame has a relatively stable posture after sliding to a suitable position, and the support effect is better.

[0008] According to some embodiments of the present invention, a groove is formed on the rotating contact surface of one of the sliding member and the support bracket, and the groove is provided with the retractable elastic tooth column; and / or, a plurality of tooth grooves are formed on the rotating contact surface of one of the sliding member and the support bracket, and the outline of the plurality of tooth grooves along the circumferential direction is arc-shaped.

[0009] According to some embodiments of the present invention, the elastic tooth post includes: a tooth post and a second elastic member, the tooth post and the second elastic member being connected in abutment, and the second elastic member being used to provide an elastic force to drive the tooth post into the tooth groove.

[0010] According to some embodiments of the present invention, the elastic toothed post is provided with at least two locking teeth, and the at least two locking teeth respectively engage with at least two adjacent tooth grooves.

[0011] According to some embodiments of the present invention, the gear rotation mechanism further includes: an angle rotating member, one axial end of which is fixedly connected to the rotation center of one of the sliding member and the support bracket, and the other axial end of which is rotatably connected to the rotation center of the other of the sliding member and the support bracket. A rotatable contact surface on one of the sliding member and the support bracket that is rotatably connected to the angle rotating member is formed with a limiting groove in the circumferential direction, and the angle rotating member is limited to rotate in the circumferential direction within the limiting groove.

[0012] According to some embodiments of the present invention, the rotation angle of the angular rotating member along the circumferential direction is equal to the arc angle of the plurality of tooth grooves arranged along the circumferential direction.

[0013] According to some embodiments of the present invention, the angle rotating component includes: a first rotating shaft, the outer periphery of which is provided with a convex shaft extending in the axial direction, a through hole is formed at the rotation center of one of the sliding member and the support bracket, the inner circumferential surface of the through hole forms the limiting groove, the first rotating shaft is rotatably disposed in the through hole and the convex shaft rotates circumferentially in the limiting groove; and a second rotating shaft, one end of which is fixedly connected to the first rotating shaft, and the other end of which is fixedly connected to the rotation center of the other of the sliding member and the support bracket.

[0014] According to some embodiments of the present invention, there are two lifting slides, and the two lifting slides are respectively arranged adjacent to the left and right sides of the headrest frame; and the two ends of the headrest bracket are respectively slidably connected to the two lifting slides.

[0015] According to some embodiments of the present invention, the sliding member includes a first slider and a second slider, the support bracket is rotatably connected to the first slider, the second slider is slidably connected in the lifting groove, and the first elastic member is connected between the second slider and the headrest frame; along the front-back direction of the headrest, the first slider and the second slider are disposed on opposite sides of the lifting groove, and the first slider and the second slider are connected.

[0016] An ergonomic chair according to a second aspect of the present invention includes: a chair back; and a headrest connected to the chair back.

[0017] 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

[0018] 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:

[0019] Figure 1 This is a structural schematic diagram of the headrest according to an embodiment of the present utility model from a first-view perspective;

[0020] Figure 2 This is a structural schematic diagram of the headrest according to an embodiment of the present utility model from a second perspective;

[0021] Figure 3 This is a schematic diagram of the headrest support according to an embodiment of the present utility model;

[0022] Figure 4 This is an exploded view of a partial structure of the headrest support according to an embodiment of the present invention. Figure 1 ;

[0023] Figure 5 This is an exploded view of a partial structure of the headrest support according to an embodiment of the present invention. Figure 1 ;

[0024] Figure 6 This is a schematic diagram of the installation of the gear shifting mechanism and the headrest bracket according to an embodiment of the present utility model. Figure 1 ;

[0025] Figure 7 This is a schematic diagram of the installation of the gear shifting mechanism and the headrest bracket according to an embodiment of the present utility model. Figure 2 ;

[0026] Figure 8 This is an exploded view of the sliding member according to an embodiment of the present utility model.

[0027] Figure label:

[0028] 1. Headrest;

[0029] 100. Headrest frame; 110. Height adjustment slide;

[0030] 200, headrest bracket; 210, support bracket; 220, slider; 221, first slider; 222, second slider; 230, groove; 240, limiting groove; 250, through hole;

[0031] 300, Gear rotation mechanism; 310, Gear groove; 320, Elastic tooth post; 321, Tooth post; 322, Second elastic element; 323, Clamping tooth; 330, Angle rotation element; 331, First rotating shaft; 332, Second rotating shaft; 333, Protruding shaft;

[0032] 400. First elastic element;

[0033] 500. Connecting components. Detailed Implementation

[0034] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0035] The following is for reference. Figures 1-8 A headrest according to an embodiment of the present utility model is described.

[0036] like Figures 1-8 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.

[0037] like Figures 1-8 As shown, the headrest 1 includes: a headrest frame 100, a headrest support 200, and a gear rotation mechanism 300.

[0038] The headrest frame 100 is provided with a lifting groove 110 extending along the height direction. The headrest bracket 200 is adapted to be connected to the chair back and includes a sliding member 220 and a support bracket 210. The first end of the sliding member 220 is rotatably connected to the support bracket 210, and the second end is slidably connected to the lifting groove 110. A first elastic member 400 is disposed between the second end of the sliding member 220 and the headrest frame 100, and is used to provide an elastic force to drive the headrest frame 100 to slide upward relative to the headrest bracket 200. A gear shifting mechanism 300 is disposed at the rotatable connection between the sliding member 220 and the support bracket 210. The gear shifting mechanism 300 includes a plurality of toothed grooves 310 and an elastic toothed post 320. One of the sliding member 220 and the support bracket 210 is provided with a plurality of toothed grooves 310, and the other of the sliding member 220 and the support bracket 210 is provided with an elastic toothed post 320, which is engaged in the toothed grooves 310.

[0039] By providing a lifting groove 110 on the headrest frame 100, and slidably connecting the second end of the slider 220 within the lifting groove 110, and rotatably connecting the first end of the slider 220 to the support bracket 210, which is adapted to connect to the chair back, the support bracket 210 can remain relatively stationary, thereby allowing the slider 220 to rotate vertically relative to the support bracket 210. When a person's head rests against the headrest 1, the headrest frame 100 can move downwards following the person's head. Simultaneously, the slider 220 moves downwards relative to the support bracket 210 to adjust the height of the headrest frame 100, thereby improving the fit between the headrest 1 and the user's head, allowing the headrest 1 to better support the user's head.

[0040] Furthermore, by providing a lifting slide 110 at the connection between the headrest bracket 200 and the headrest frame 100, the lifting slide 110 can be closer to the front of the headrest frame 100 in the front-back direction. That is, the sliding connection between the headrest bracket 200 and the headrest frame 100 can be closer to the front of the headrest frame 100. When the human head leans against the headrest 1, the headrest frame 100 is easier to move downward with the head leaning against it, thereby improving the adjustment sensitivity of the headrest frame 100 and making the adjustment effect of the headrest frame 100 in the vertical direction better.

[0041] Furthermore, a first elastic element 400 is disposed between the second end of the slider 220 and the headrest frame 100, and the first elastic element 400 is used to generate an elastic force that drives the headrest frame 100 to slide upward relative to the headrest support 200. Thus, when a person's head rests against the headrest 1, the headrest frame 100 can move downward relative to the headrest support 200. At this time, the first elastic element 400 can be compressed or stretched to generate an elastic force. When the user's head moves forward, the first elastic element 400 can push the headrest frame 100 upward relative to the headrest support 200, allowing the headrest 1 to adaptively adjust according to the user's head position, providing better support. Furthermore, when the user's head completely leaves the headrest 1, the first elastic element 400 can push the headrest frame 100 back to its initial state. In this way, adaptive adjustment in the vertical direction is possible according to the position of the human head, offering advantages such as high adjustment sensitivity and stability.

[0042] Furthermore, a gear shifting mechanism 300 is provided at the rotatable connection between the first end of the slider 220 and the support bracket 210. The rotatable connection is the rotatable contact surface formed by the mutual rotation of the first end of the slider 220 and the support bracket 210. The rotatable contact surface on one of the slider 220 and the support bracket 210 is provided with several grooves 310 in the gear shifting mechanism 300, and the rotatable contact surface on the other of the slider 220 and the support bracket 210 is provided with elastic toothed posts 320, which automatically engage with a certain toothed post 310 under the elastic force of the elastic toothed post 320.

[0043] With this configuration, when the user's head rests against the headrest 1, the headrest frame 100 can move downwards relative to the headrest support 200. At this time, the first elastic element 400 can be compressed or stretched to generate elastic force, causing the slider 220 to rotate downwards or upwards under the elastic force of the first elastic element 400. When the headrest frame 100 slides down to a suitable position for the user's head, the first elastic element 400 no longer deforms. At this time, the elastic toothed column 320 engages in a certain toothed groove 310, so that the slider 220 and the support bracket 210 no longer rotate, thus ensuring that the headrest frame 100 has a stable posture after sliding down to a suitable position. When the user's head moves forward, the first elastic element 400 can push the headrest frame 100 upwards relative to the headrest support 200. Similarly, the elastic toothed column 320 in the gear shifting mechanism 300 engages in the corresponding toothed groove 310. Therefore, the headrest 1 can adaptively adjust according to the position and force of the human head, and under the control of the gear rotation mechanism 300, the headrest 1 can ensure a stable support effect and will not slide randomly.

[0044] Therefore, by setting a gear rotation mechanism 300 at the rotatable connection between the slider 220 and the support bracket 210, when the human head rests against the headrest 1, the first elastic element 400 can be compressed or stretched to generate elastic force, causing the slider 220 to rotate downwards or upwards under the elastic force of the first elastic element 400. When the headrest frame 100 slides to a suitable position that conforms to the human head, the first elastic element 400 no longer deforms. At this time, the elastic tooth 320 of the gear rotation mechanism 300 engages in a tooth groove 310, so that the slider 220 and the support bracket 210 no longer rotate, thereby ensuring that the headrest frame 100 has a stable posture after sliding down to a suitable position, resulting in better support. That is, the slider 220 is fixed relative to the support bracket 210 at different rotation angles, thereby allowing for multi-angle adjustment of the headrest frame 100 relative to the support bracket 210, so that the headrest 1 can better fit and support the user's head.

[0045] According to some embodiments of the present invention, a groove 230 is formed on the rotating contact surface of one of the sliding member 220 and the support bracket 210, and a retractable elastic toothed post 320 is provided in the groove 230.

[0046] According to some embodiments of the present invention, a plurality of toothed grooves 310 are formed on the rotating contact surface of one of the sliding member 220 and the support bracket 210, and the contour lines of the plurality of toothed grooves 310 along the circumferential direction are arc-shaped.

[0047] Reference Figures 4-8 As shown in the example of this utility model, a groove 230 is formed on the rotating contact surface of the slider 220, so that the elastic toothed column 320 is installed in the groove 230, and a plurality of toothed grooves 310 are formed on the rotating contact surface of the support bracket 210. With this configuration, when the slider 220 rotates to a certain position relative to the support bracket 210 and stops rotating, the elastic toothed column 320 is engaged in a toothed groove 310. Since the headrest frame 100 has a certain sliding range relative to the lifting slide 110, the slider 220 does not rotate 360° relative to the support bracket 210. Therefore, at least a portion of the arcuate surface along the circumferential direction on the rotating contact surface of one of the slider 220 and the support bracket 210 is formed with a plurality of toothed grooves 310.

[0048] According to some embodiments of the present invention, the elastic toothed post 320 includes: a toothed post 321 and a second elastic member 322, wherein the toothed post 321 and the second elastic member 322 are abuttingly connected, and the second elastic member 322 is used to provide an elastic force for driving the toothed post 321 to engage with the tooth groove 310. (Refer to...) Figures 5-7 As shown, one end of the toothed post 321 abuts against the second elastic member 322, and the other end is engaged in the toothed groove 310 under the elastic force of the second elastic member 322. The end of the second elastic member 322 away from the toothed post 321 is connected to the bottom of the groove 230.

[0049] According to some embodiments of the present invention, the elastic toothed post 320 is provided with at least two locking teeth 323, and the at least two locking teeth 323 respectively engage with at least two adjacent tooth grooves 310.

[0050] Reference Figure 6 and Figure 7 As shown, in this example, the two locking teeth 323 respectively engage with the two adjacent toothed grooves 310, that is, the two toothed grooves 310 form a set position. Compared with the set position of one toothed groove 310, the support effect of the headrest frame 100 can be improved, so that the headrest frame 100 can maintain a stable posture after sliding to the appropriate position.

[0051] According to some embodiments of the present invention, the gear rotation mechanism 300 further includes: an angle rotating member 330, one axial end of which is fixedly connected to a rotation center on one of the sliding member 220 and the support bracket 210, and the other axial end of which is rotatably connected to a rotation center on the other of the sliding member 220 and the support bracket 210. A limiting groove 240 is formed on a rotating contact surface on one of the sliding member 220 and the support bracket 210 that is rotatably connected to the angle rotating member 330. The angle rotating member 330 is limited to rotate in the circumferential direction within the limiting groove 240.

[0052] Reference Figures 4-7 As shown, in this example, one axial end of the angle rotating member 330 is fixedly connected to the rotation center of the support bracket 210, and the other axial end of the angle rotating member 330 is rotatably connected to the rotation center of the sliding member 220. The rotational contact surface of the sliding member 220 that rotatably engages with the angle rotating member 330 forms a limiting groove 240, so that the angle rotating member 330 is limited to rotate in the circumferential direction within the limiting groove 240. With this setting, by limiting the rotation angle of the relative rotation between the sliding member 220 and the support bracket 210, it can be ensured that the elastic toothed column 320 can selectively engage in a certain toothed groove 310 within the circumferential range of several toothed grooves 310, thereby ensuring that the gear adjustment of the gear rotation mechanism 300 is within a certain range and will not change arbitrarily.

[0053] Furthermore, the rotation angle of the angular rotating member 330 in the circumferential direction is equal to the arc angle of the plurality of tooth grooves 310 arranged in the circumferential direction. That is, the rotation angle of the angular rotating member 330 is consistent with the arc angle of the plurality of tooth grooves 310 arranged in the circumferential direction, thereby effectively ensuring that the elastic tooth column 320 is only engaged in a certain tooth groove 310 within the circumferential range of the plurality of tooth grooves 310.

[0054] According to some embodiments of the present invention, the angle rotating member 330 includes: a first rotating shaft 331 and a second rotating shaft 332. The outer periphery of the first rotating shaft 331 is provided with a convex shaft 333 extending in the axial direction. A through hole 250 is formed at the rotation center of one of the sliding member 220 and the support bracket 210. A limiting groove 240 is formed on the inner circumferential surface of the through hole 250. The first rotating shaft 331 is rotatably disposed within the through hole 250, and the convex shaft 333 rotates circumferentially within the limiting groove 240. One axial end of the second rotating shaft 332 is fixedly connected to the first rotating shaft 331, and the other end is fixedly connected to the rotation center of the other of the sliding member 220 and the support bracket 210.

[0055] Reference Figures 3-7 As shown, in this example, the first rotating shaft 331 is rotatably connected to the rotation center of the slider 220, and the second rotating shaft 332 is fixed to the rotation center of the support bracket 210. The outer periphery of the first rotating shaft 331 is provided with a convex shaft 333, which rotates circumferentially within the limiting groove 240 of the slider 220. One axial end of the first rotating shaft 331 extends into the through hole 250 of the slider 220 and is connected to one axial end of the second rotating shaft 332. The other axial end of the second rotating shaft 332 is fixedly connected to the rotation center of the support bracket 210.

[0056] According to some embodiments of this utility model, there are two lifting slides 110, and the two lifting slides 110 are respectively arranged adjacent to the left and right sides of the headrest frame 100. Furthermore, both ends of the headrest bracket 200 are slidably connected to the two lifting slides 110.

[0057] This design not only improves the connection stability between the headrest frame 100 and the headrest support 200, allowing the headrest frame 100 to move more stably relative to the headrest support 200 in the vertical direction, but also eliminates the need for excessive lifting grooves 110, simplifying the structure of the headrest frame 100 and making it easier to install. Furthermore, by providing lifting grooves 110 near the left and right sides of the headrest frame 100, the left and right ends of the headrest frame 100 can engage with the headrest support 200, resulting in a more even distribution of load on both the headrest frame 100 and the headrest support 200. This reduces the swaying of the headrest frame 100 relative to the headrest support 200 and effectively prevents damage to the connection structure between the headrest frame 100 and the headrest support 200, thereby extending the service life of the headrest 1.

[0058] According to some embodiments of the present invention, the sliding member 220 includes a first slider 221 and a second slider 222 connected together. The support bracket 210 is rotatably connected to the first slider 221. The second slider 222 is slidably connected within the lifting groove 110. A first elastic member 400 is connected between the second slider 222 and the headrest frame 100. Specifically, along the front-back direction of the headrest 1, the first slider 221 and the second slider 222 are located on opposite sides of the lifting groove 110, and the first slider 221 and the second slider 222 are connected.

[0059] Specifically, the first slider 221 can be located on the rear side of the lifting slide 110 and rotatably connected to the support bracket 210, that is, the first slider 221 is the rear slider, and the second slider 222 can be located on the front side of the lifting slide 110 and connected to the first slider 221, that is, the second slider 222 can be the front slider.

[0060] For example, the first slider 221 and the second slider 222 can be connected by bolts. For instance, multiple connecting holes can be provided on the first slider 221 and the second slider 222 respectively, and the bolts can be inserted into the connecting holes of the first slider 221 and the second slider 222 in sequence to connect and fix the first slider 221 and the second slider 222.

[0061] In addition, the width of the first slider 221 and the second slider 222 can both be greater than the width of the lifting slide 110. The second slider 222 can abut against the front side of the lifting slide 110 seat, and the first slider 221 can abut against the rear side of the lifting slide 110. That is, the first slider 221 and the second slider 222 clamp the lifting slide 110 seat to limit the relative position of the slider 220 and the lifting slide 110 seat in the front-back direction, so as to prevent the slider 220 and the lifting slide 110 seat from moving relative to each other in the front-back direction, so that the slider 220 is stably connected to the lifting slide 110 seat, thereby allowing the headrest bracket 200 to move stably relative to the headrest frame 100 along the extension direction of the lifting slide 110.

[0062] In some embodiments of this utility model, the headrest bracket 200 may also include a connecting component 500. The support bracket 210 can be connected to the chair back through the connecting component 500, thereby allowing the height of the headrest 1 relative to the chair back to be adjusted using the connecting component 500.

[0063] In some specific embodiments of this utility model, the support bracket 210 and the first slider 221 can be rotatably connected so that the first slider 221 can rotate relative to the support bracket 210.

[0064] The ergonomic chair according to the second embodiment of the present invention includes: a chair back and a headrest 1, wherein the headrest 1 is connected to the chair back.

[0065] According to the ergonomic chair of this utility model embodiment, by utilizing the headrest 1 of the above embodiment of this utility model, the headrest 1 can adaptively adjust in the vertical direction according to the user's head position. Furthermore, under the adjustment of the gear rotation mechanism 300, the sliding member 220 is fixed relative to the support bracket 210 at different rotation angles, thereby allowing for multi-angle adjustment of the headrest frame 100 relative to the support bracket 210, so that the headrest 1 can better conform to and support the user's head. The headrest 1 of this utility model has the advantages of sensitive adjustment and high adjustment stability.

[0066] 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", "clockwise", "counterclockwise", "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.

[0067] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0068] 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: A headrest frame (100) is provided with a lifting groove (110) extending in the height direction. A headrest bracket (200) is adapted to be connected to a chair back. The headrest bracket (200) includes a sliding member (220) and a support bracket (210). The first end of the sliding member (220) is rotatably connected to the support bracket (210), and the second end is slidably connected to the lifting groove (110). A first elastic element (400) is disposed between the second end of the sliding element (220) and the headrest frame (100) for providing an elastic force that drives the headrest frame (100) to slide upward relative to the headrest support (200); A gear shifting mechanism (300) is provided at the rotational connection between the sliding member (220) and the support bracket (210). The gear shifting mechanism (300) includes a plurality of toothed grooves (310) and an elastic toothed column (320). A plurality of toothed grooves (310) are provided on one of the sliding member (220) and the support bracket (210), and an elastic toothed column (320) is provided on the other of the sliding member (220) and the support bracket (210). The elastic toothed column (320) is engaged in the toothed grooves (310).

2. The headrest (1) according to claim 1, characterized in that, A groove (230) is formed on the rotating contact surface of one of the sliding member (220) and the support bracket (210), and a retractable elastic toothed post (320) is provided in the groove (230); and / or, A plurality of the toothed grooves (310) are formed on the rotating contact surface of one of the sliding member (220) and the support bracket (210), and the contour lines of the plurality of toothed grooves (310) along the circumferential direction are arc-shaped.

3. The headrest (1) according to claim 1, characterized in that, The elastic toothed column (320) includes: a toothed column (321) and a second elastic member (322), wherein the toothed column (321) and the second elastic member (322) are in abutting connection, and the second elastic member (322) is used to provide an elastic force to drive the toothed column (321) into the tooth groove (310).

4. The headrest (1) according to claim 1, characterized in that, The elastic toothed post (320) is provided with at least two locking teeth (323), and the at least two locking teeth (323) are respectively locked into the at least two adjacent tooth grooves (310).

5. The headrest (1) according to claim 1, characterized in that, The gear shifting mechanism (300) further includes an angle rotating member (330), one axial end of which is fixedly connected to the rotation center of one of the sliding member (220) and the support bracket (210), and the other axial end is rotatably connected to the rotation center of the other of the sliding member (220) and the support bracket (210). A circumferentially oriented limiting groove (240) is formed on the rotating contact surface of one of the sliding member (220) and the support bracket (210) that is rotatably connected to the angle rotating member (330). The angle rotating member (330) is limited to rotate in the circumferential direction within the limiting groove (240).

6. The headrest (1) according to claim 5, characterized in that, The rotation angle of the angular rotator (330) in the circumferential direction is equal to the arc angle of the plurality of tooth grooves (310) arranged in the circumferential direction.

7. The headrest (1) according to claim 5, characterized in that, The angle rotating component (330) includes: A first rotating shaft (331) is provided with a convex shaft (333) extending in the axial direction on its outer periphery. A through hole (250) is formed at the rotation center of one of the sliding member (220) and the support bracket (210). The limiting groove (240) is formed on the inner circumferential surface of the through hole (250). The first rotating shaft (331) is rotatably disposed in the through hole (250) and the convex shaft (333) rotates circumferentially in the limiting groove (240). The second rotating shaft (332) is fixedly connected at one end to the first rotating shaft (331) and at the other end to the rotation center of the other of the sliding member (220) and the support bracket (210).

8. The headrest (1) according to claim 1, characterized in that, There are two lifting slides (110), and the two lifting slides (110) are respectively arranged adjacent to the left and right sides of the headrest frame (100); and, The two ends of the headrest bracket (200) are slidably connected to the two lifting slides (110).

9. The headrest (1) according to claim 1, characterized in that, The slider (220) includes a first slider (221) and a second slider (222). The support bracket (210) is rotatably connected to the first slider (221). The second slider (222) is slidably connected to the lifting groove (110). The first elastic element (400) is connected between the second slider (222) and the headrest frame (100). Along the front-back direction of the headrest (1), the first slider (221) and the second slider (222) are located on opposite sides of the lifting slide (110), and the first slider (221) is connected to the second slider (222).

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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