Headrest and ergonomic chair

Abstract

The utility model discloses a headrest and an ergonomic chair. The headrest comprises a headrest frame, a headrest body and a backrest, one end of the headrest support is connected with the headrest frame; the connecting assembly is suitable for being connected with the chair back, the connecting assembly is supported on the lower side of the other end of the headrest support and comprises a connecting plate and a connecting support, and the lower side of the other end of the headrest support is slidably connected to the connecting plate in the front-back direction; the connecting plate is slidably connected to the upper side of the connecting support in the front-back direction. The first elastic piece is respectively connected with the connecting plate and the other end of the headrest bracket so as to drive the headrest bracket to move forwards relative to the connecting plate to generate elastic force; the gear adjusting mechanism comprises a gear groove and a gear sliding block, the gear groove is formed in the lower side face of the connecting plate, a plurality of gear notches are formed in the gear groove, and the gear sliding block is arranged on the upper side face of the connecting support; the headrest bracket slides backwards relative to the connecting plate; or, the connecting plate slides forwards relative to the connecting support, so that the gear sliding block is clamped into any gear notch.

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 Art

[0002] Headrests in related technologies typically include a headrest frame, a headrest support, and a connecting component. The connecting component connects to the chair back, and the headrest frame is connected to the connecting component via the headrest support. The headrest support can move relative to the connecting component in the front-back direction, thereby adjusting the front-back position of the headrest frame. When a person's head rests against the headrest, the headrest frame can move backward with the person's head to provide better head support.

[0003] However, due to the unreasonable structural design of the headrest in the relevant technology, the adjustment range of the headrest frame in the front-to-back direction is small, which cannot meet the user's comfort needs. 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 that increases the range of travel of the headrest frame in the front-to-back position, allowing the user to choose adaptive adjustment or level adjustment according to their leaning needs.

[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; a headrest bracket, one end of which is connected to the headrest frame; a connecting assembly adapted to be connected to a chair back, the connecting assembly being supported on the lower side of the other end of the headrest bracket, and the connecting assembly including: a connecting plate and a connecting bracket, the lower side of the other end of the headrest bracket being slidably connected to the connecting plate in a front-back direction, the connecting plate being slidably connected to the upper side of the connecting bracket in a front-back direction; and a first elastic member, the first elastic member being connected to the connecting plate and the other end of the headrest bracket respectively, for providing a driving force. The headrest support moves forward relative to the connecting plate with an elastic force; a gear adjustment mechanism includes a gear groove and a gear slider, the gear groove is located on the lower side of the connecting plate and forms a plurality of gear slots, and the gear slider is located on the upper side of the connecting support; when the headrest frame is compressed, the headrest support slides backward relative to the connecting plate, and under the action of the first elastic element, the headrest adaptively adjusts according to the pressure; or, when the headrest frame moves forward, the connecting plate slides forward relative to the connecting support, causing the gear slider to engage in any of the gear slots.

[0007] According to the headrest of this embodiment, the travel range of the headrest frame in the forward and backward positions is increased, allowing the user to choose between adaptive adjustment or positional adjustment according to their leaning needs. That is, when the user needs to adjust the headrest frame forward, the positional adjustment mechanism is adjusted to meet the user's leaning requirements; when the user's head leans backward against the headrest frame, adaptive adjustment is performed. Therefore, the headrest of this invention, employing either of the above adjustment methods, maintains a stable posture and provides good support, giving it the advantages of both adjustment flexibility and support stability.

[0008] According to some embodiments of the present invention, a limiting part is provided at the front end of the connecting plate, and when the gear slider is located at the initial gear position of the gear adjustment mechanism, the limiting part is in limiting cooperation with the connecting bracket; wherein, the initial gear position of the gear adjustment mechanism is the first gear slot at the foremost end of the gear slot where the gear slider is located.

[0009] According to some embodiments of the present invention, the gear adjustment mechanism further includes a second elastic member, which is disposed on the upper side of the connecting bracket and is used to provide an elastic force for driving the gear slider into the gear slot.

[0010] According to some embodiments of the present invention, the gear adjustment mechanism further includes: a first groove, the first groove being disposed on the upper side of the connecting bracket, the gear slider and the second elastic member being disposed in the first groove, the first end of the gear slider being movably connected to the first groove, and one side of the second end abutting against the second elastic member and being engaged in the gear slot under the elastic force of the second elastic member.

[0011] According to some embodiments of the present invention, the upper side of the second end of the gear slider is provided with a first protrusion protruding from the first groove opening, and the first protrusion is engaged in the gear groove opening.

[0012] According to some embodiments of the present invention, the gear adjustment mechanism further includes: a second groove, the second groove being disposed at the bottom of the first groove, the second groove having a gear position slot and a shift slot in the left-right direction, and the lower side of the second end of the gear slider being provided with a second protrusion protruding from the bottom of the first groove, the second protrusion being switched between the gear position slot and the shift slot by the elastic force of the second elastic member.

[0013] According to some embodiments of the present invention, the gear slot has a first straight edge on one side and a curved edge on the other side in the left-right direction, and the curved edge forms a plurality of gear slot openings; when the second end of the gear slider is engaged in the gear slot opening, the second protrusion is located in the gear slot; when the second end of the gear slider slides out of the gear slot opening and approaches the first straight edge, the second protrusion is located in the gear shifting slot.

[0014] According to some embodiments of the present invention, a second straight edge is further provided on the side of the gear slot opposite to the first straight edge. The second straight edge is parallel to the first straight edge, and the front end of the second straight edge is connected to the rear end of the curved edge. The rear end of the curved edge is inclined backward and connected to the second straight edge. A first stop portion is provided on the connecting plate. The upper end of the first stop portion is fixed on the connecting plate, and the lower end of the first stop portion is placed in the groove between the first straight edge and the second straight edge for selectively stopping the gear slider.

[0015] According to some embodiments of the present invention, a protruding post is provided in the first groove, a strip-shaped through hole is formed at the first end of the gear slider, the first end of the gear slider is sleeved on the protruding post through the strip-shaped through hole, the gear shifting slot is arranged forward relative to the gear slot, and the second protrusion is limited to move within the second groove.

[0016] According to some embodiments of the present invention, the lower side of the other end of the headrest bracket is provided with a plurality of sliding parts, the connecting plate is provided with a plurality of first guide grooves, the first guide grooves extend in the front-back direction and are arranged in the left-right direction, and the plurality of sliding parts are connected one-to-one in the plurality of first guide grooves.

[0017] An ergonomic chair according to a second aspect of the present invention includes: a chair back; and a headrest connected to the chair back.

[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 structural schematic diagram of the headrest according to an embodiment of the present utility model from a first-view perspective;

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

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

[0023] Figure 4 This is a schematic diagram of the gear adjustment mechanism in the connecting assembly according to an embodiment of the present utility model in the initial gear position;

[0024] Figure 5 This is a schematic diagram of the gear adjustment mechanism in the connecting assembly according to an embodiment of the present utility model at its maximum gear position;

[0025] Figure 6 This is a structural schematic diagram of the lower side of the connecting plate according to an embodiment of the present utility model;

[0026] Figure 7 This is a schematic diagram of the upper side of the connecting bracket according to an embodiment of the present utility model. Figure 1 ;

[0027] Figure 8 This is a schematic diagram of the gear slider in the gear slot according to an embodiment of the present utility model.

[0028] Figure 9 This is a schematic diagram of the gear shift slider in the shift groove according to an embodiment of the present utility model;

[0029] Figure 10 This is a schematic diagram of the upper side of the connecting bracket according to an embodiment of the present utility model. Figure 2 ;

[0030] Figure 11 This is a schematic diagram of the gear slider according to an embodiment of the present utility model;

[0031] Figure 12 This is a structural schematic diagram of the lower side of the other end of the headrest bracket according to an embodiment of the present utility model.

[0032] Figure label:

[0033] 1. Headrest;

[0034] 100. Headrest frame;

[0035] 200. Headrest support; 210. Sliding part; 220. Second stop part;

[0036] 300. Connecting assembly; 310. Connecting plate; 311. First guide groove; 312. Cavity; 313. Limiting part; 314. First stop part; 320. Connecting bracket; 321. Second guide groove; 330. Adapter;

[0037] 400. First elastic element;

[0038] 500. Gear adjustment mechanism;

[0039] 510. Gear slot; 511. Gear slot opening; 512. First straight edge; 513. Curved edge; 514. Second straight edge;

[0040] 520. Gear slider; 521. First protrusion; 522. Second protrusion; 523. Strip-shaped through hole;

[0041] 530. Second elastic element;

[0042] 540. First groove;

[0043] 550, Second groove; 551, Gear shift groove; 552, Gear shift groove;

[0044] 560. Convex column. DETAILED DESCRIPTION

[0045] 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.

[0046] The following is for reference. Figures 1-12 A headrest according to an embodiment of the present utility model is described.

[0047] like Figures 1-12 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.

[0048] like Figures 1-12 As shown, the headrest 1 includes: a headrest frame 100, a headrest support 200, a connecting component 300, a first elastic element 400, and a position adjustment mechanism 500. The headrest frame 100 is connected to one end of the headrest support 200, and the connecting component 300 is supported on the underside of the other end of the headrest support 200. The connecting component 300 is adapted to be connected to the chair back.

[0049] Furthermore, the connecting assembly 300 includes a connecting plate 310 and a connecting bracket 320. The lower side of the other end of the headrest bracket 200 is slidably connected to the connecting plate 310 in the front-back direction. The connecting plate 310 is slidably connected to the lower side of the connecting bracket 320 in the front-back direction. A first elastic member 400 is connected to the connecting plate 310 and the other end of the headrest bracket 200, respectively, and is used to provide an elastic force to drive the headrest bracket 200 assembly to move forward relative to the connecting plate 310. That is, the headrest bracket 200, the connecting plate 310, and the connecting bracket 320 are arranged sequentially from top to bottom.

[0050] When the headrest frame 100 is compressed, the headrest bracket 200 slides backward relative to the connecting plate 310, and under the action of the first elastic element 400, the headrest 1 adapts to the pressure.

[0051] Specifically, when the user's head leans back against the headrest 1, the headrest support 200 causes the headrest frame 100 to slide backward relative to the connecting plate 310, depending on the magnitude of the force exerted by the user's head on the headrest frame 100 and the degree of leaning. At this time, the first elastic element 400 can be compressed or stretched to generate elastic force until the headrest frame 100 slides backward to a suitable position, at which point the first elastic element 400 no longer deforms, and the headrest frame 100 achieves a posture that conforms to the user's head. When the user's head moves forward, the first elastic element 400 can push the headrest support 200 and the headrest frame 100 forward relative to the connecting plate 310, allowing the headrest 1 to adaptively adjust according to the user's head position. Furthermore, when the user's head completely leaves the headrest 1, the first elastic element 400 can push the headrest support 200 and the headrest frame 100 forward to return to their initial state, i.e., the headrest support 200 slides forward relative to the connecting plate 310 to its initial position.

[0052] For example, the first 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 headrest bracket 200 will not slide relative to the connecting plate 310 in the front-back direction. At this time, the first elastic element 400 is in its initial state and remains balanced.

[0053] In some specific embodiments of this utility model, such as Figure 3 , Figure 4 and Figure 12 As shown, the first elastic element 400 is disposed between the front part of the connecting plate 310 and the front part of the lower side of the other end of the headrest bracket 200, so as to compress the first elastic element 400 when the headrest bracket 200 moves backward relative to the connecting plate 310. Thus, when the user's head rests against the headrest 1, the headrest frame 100 and the headrest bracket 200 move backward relative to the connecting assembly 300. At this time, the first elastic element 400 is compressed, so that the first elastic element 400 can generate an elastic restoring force to drive the headrest bracket 200 to move forward relative to the connecting plate 310. When the user's head moves forward, the first elastic element 400 drives the headrest bracket 200 and the headrest frame 100 to adaptively adjust in the front-back direction according to the position of the user's head. After the user's head completely leaves the headrest 1, the elastic force of the first elastic element 400 can drive the headrest bracket 200 and the headrest frame 100 to move forward relative to the connecting plate 310 and return to their original position.

[0054] The upper side of the connecting plate 310 is provided with a cavity 312, and the first elastic member 400 is fixed to the lower side of the other end of the headrest bracket 200 so that one end of the first elastic member 400 abuts in the cavity 312, so that the first elastic member 400 abuts against the connecting plate 310 when it is compressed or stretched.

[0055] Additionally, refer to Figures 4-11 As shown, the gear adjustment mechanism 500 includes a gear slot 510 and a gear slider 520. The gear slot 510 is located on the lower side of the connecting plate 310 and has a plurality of gear openings 511. The gear slider 520 is located on the upper side of the connecting bracket 320. When the headrest frame 100 is moved forward, the connecting plate 310 slides forward relative to the connecting bracket 320, causing the gear slider 520 to engage in any of the gear openings 511.

[0056] Specifically, when the user needs to adjust the position of the headrest frame 100 to be closer to the front, the user can adjust the headrest frame 100 or the headrest bracket 200 to move forward, so that the connecting plate 310 slides forward relative to the connecting bracket 320. When the headrest frame 100 moves forward to the desired position, the stop slider 520 on the upper side of the connecting bracket 320 is engaged in a stop slot 511 on the lower side of the connecting plate 310, thereby realizing the stop adjustment mechanism 500 to adjust the forward movement of the headrest frame 100.

[0057] In this way, the headrest frame 100 can move backward to a suitable position according to the force exerted by the user's head on the first elastic element 400, achieving adaptive adjustment of the headrest frame 100 moving backward under pressure. The headrest frame 100 can also be adjusted forward to a suitable position according to the user's adjustment of the headrest frame 100 or the headrest support 200, achieving adjustment of the forward movement level. Thus, the user can choose adaptive adjustment or level adjustment according to their need for support.

[0058] Therefore, according to the present invention, the headrest 1 is slidably connected to the headrest bracket 200 and the connecting plate 310, and connected between the headrest bracket 200 and the connecting plate 310 by the first elastic member 400. The headrest frame 100, under the force of the user's head, causes the headrest bracket 200 to move backward relative to the connecting plate 310, achieving adaptive adjustment of the headrest frame 100's backward movement. Furthermore, through the slidable connection between the connecting plate 310 and the connecting bracket 320, and the presence of a position adjustment mechanism between them, the user can adjust the headrest frame 100 or the headrest bracket 200 to move forward, achieving position adjustment of the headrest frame 100. This increases the travel range of the headrest frame 100 in the forward and backward positions, allowing the user to choose between adaptive adjustment or position adjustment according to their leaning needs. That is, when the user needs to adjust the headrest frame 100 forward, the position of the position adjustment mechanism 500 can be adjusted to meet the user's leaning requirements; when the user's head leans backward against the headrest frame 100, adaptive adjustment is performed. Therefore, the headrest 1 of this utility model, using any of the above-mentioned adjustment methods, has a stable posture and good support effect, giving the headrest 1 of this utility model the advantages of adjustment flexibility and support stability.

[0059] According to some embodiments of this utility model, a limiting part 313 is provided at the front end of the connecting plate 310. When the gear slider 520 is in the initial gear position of the gear adjustment mechanism 500, the limiting part 313 and the connecting bracket 320 are in a limiting cooperation. The initial gear position of the gear adjustment mechanism 500 is when the gear slider 520 is located at the first gear slot 511 at the foremost end of the gear slot 510.

[0060] Reference Figures 4-6 As shown, when the gear slider 520 is located at the first gear slot 511 at the frontmost end of the gear slot 510, the gear slider 520 is in the initial gear position of the gear adjustment mechanism 500. At this time, the limiting part 313 of the connecting plate 310 is in a limiting engagement with the connecting bracket 320.

[0061] When the user leans against the headrest frame 100 for adaptive adjustment, the position slider 520 is in the initial position of the position adjustment mechanism 500, that is, the limiting part 313 at the front end of the connecting plate 310 is in a limiting engagement with the connecting bracket 320. In this way, when the headrest frame 100 is pressed and moves backward, the connecting plate 310 and the connecting bracket 320 will not slide relative to each other, thereby allowing the headrest bracket 200 to slide backward relative to the connecting plate 310 until it reaches the appropriate position.

[0062] When the user moves the headrest frame 100 forward without leaning against it, the gear slider 520 starts adjusting from the initial gear of the gear adjustment mechanism 500 until it is adjusted to the appropriate gear.

[0063] According to some embodiments of the present invention, the gear adjustment mechanism 500 further includes a second elastic member 530, which is disposed on the upper side of the connecting bracket 320 and is used to provide an elastic force for driving the gear slider 520 to engage with the gear slot 511.

[0064] like Figures 4-11 As shown, the second elastic element 530 drives the gear slider 520 to engage in the gear slot 511, so that the gear slider 520 can always be engaged in a certain gear slot 511 when changing gears in several gear slots 511.

[0065] According to some embodiments of the present invention, the gear adjustment mechanism 500 further includes: a first groove 540, the first groove 540 being disposed on the upper side of the connecting bracket 320, the gear slider 520 and the second elastic member 530 being disposed in the first groove 540, the first end of the gear slider 520 being movably connected to the first groove 540, one side of the second end abutting against the second elastic member 530, and being engaged into the gear slot 511 under the elastic force of the second elastic member 530.

[0066] like Figures 4-11 As shown, a first groove 540 is formed on the upper side of the connecting bracket 320 so that the gear slider 520 and the second elastic member 530 are installed in the first groove 540. The first end of the gear slider 520 is movably connected in the first groove 540, and one side of the other end is abutted by the second elastic member 530 so that the second end of the gear slider 520 can be inserted into the gear slot 511.

[0067] According to some embodiments of the present invention, the upper side of the second end of the gear slider 520 is provided with a first protrusion 521 protruding from the opening of the first groove 540, and the first protrusion 521 is inserted into the gear slot 511.

[0068] like Figures 4-11 As shown, a first protrusion 521 is provided on the upper side of the second end of the gear slider 520, so that the first protrusion 521 can be engaged in the gear slot 511, while the rest of the gear slider 520, excluding the first protrusion 521, slides within the first groove 540. In this way, the size of the first protrusion 521 is adapted to the size of the gear slot 511, avoiding the entire gear slider 520 from engaging with the gear slot 511.

[0069] In addition, by setting the first protrusion 521, the lower side of the connecting plate 310 can press the second elastic member 530, preventing the second elastic member 530 from arching upward when it acts on the gear slider 520 to move in sequence within several gear slots 511, thus ensuring that the second elastic member 530 can always act on the gear slider 520.

[0070] According to some embodiments of the present invention, the gear adjustment mechanism 500 further includes: a second groove 550, which is disposed at the bottom of the first groove 540. The second groove 550 has a gear position slot 551 and a shift slot 552 in the left and right directions. The lower side of the second end of the gear slider 520 is provided with a second protrusion 522 protruding from the bottom of the first groove 540. The second protrusion 522 switches positions between the gear position slot 551 and the shift slot 552 under the elastic force of the second elastic member 530.

[0071] With this configuration, when the connecting plate 310 moves backward relative to the connecting bracket 320, the gear slider 520 needs to switch multiple gear slots 511 in sequence. Thus, under the action of the second elastic member 530, the second protrusion 522 switches positions within the gear slot 551 and the shift slot 552, thereby enabling the second end of the gear slider 520 to move left and right as it enters and leaves the gear slot 511.

[0072] Specifically, the gear shift groove 510 has a first straight edge 512 on one side and a curved edge 513 on the other side, with the curved edge 513 forming a plurality of gear shift openings 511. When the second end of the gear shift slider 520 is engaged in the gear shift opening 511, the second protrusion 522 is located in the gear shift groove 551. When the second end of the gear shift slider 520 slides out of the gear shift opening 511, the second protrusion 522 is located in the gear shift groove 552.

[0073] According to some embodiments of the present invention, a second straight edge 514 is provided on the side of the gear slot 510 opposite to the first straight edge 512. The second straight edge 514 is parallel to the first straight edge 512 and the front end of the second straight edge 514 is connected to the rear end of the curved edge 513. The rear end of the curved edge 513 is inclined backward and connected to the second straight edge 514.

[0074] Additionally, the connecting plate 310 is provided with a first stop portion 314, the upper end of the first stop portion 314 is fixed on the connecting plate 310, and the lower end of the first stop portion 314 is placed in the groove between the first straight line and the second straight line edge 514, for selectively stopping with the gear slider 520.

[0075] refer to Figure 5 and Figure 6 As shown, the rear end of the curved edge 513 is inclined backward and connected to the second straight edge 514. The second straight edge 514 is parallel to the first straight edge 512, such that the size of the groove formed between the second straight edge 514 and the first straight edge 512 is smaller than the size of the groove formed between the first straight edge 512 and the curved edge 513.

[0076] When the headrest support 200 moves forward to the last gear slot 511, the gear adjustment mechanism 500 is at its maximum position, meaning the headrest frame 100 has moved forward to its limit. When the headrest frame 100 returns to its original position, it is first moved forward again, causing the gear slider 520 to slide out of the last gear slot 511 and slide along the rear end of the curved edge 513 into the groove formed between the second straight edge 514 and the first straight edge 512. When the headrest frame 100 moves forward until the gear slider 520 engages with the first stop 314, the headrest frame 100 is then adjusted to move backward, allowing the gear slider 520 to slide back to its initial position.

[0077] According to some embodiments of the present invention, the first groove 540 is provided with a protrusion 560, the first end of the gear slider 520 is formed with a strip-shaped through hole 523, the first end of the gear slider 520 is sleeved on the protrusion 560 through the strip-shaped through hole 523, the gear shifting groove 552 is arranged forward relative to the gear shifting groove 551, and the second protrusion 522 is limited to move within the second groove 550.

[0078] With this configuration, since the first end of the gear shift slider 520 is movably connected to the protrusion 560, and by positioning the shift slot 552 forward relative to the gear shift slot 551, the gear shift slider 520 can freely switch positions between the gear shift slot 551 and the shift slot 552 under the elastic force of the second elastic member 530. That is, the positioning of the gear shift slot 551 and the shift slot 552 allows the gear shift slider 520 to switch positions between the gear shift slot 551 and the shift slot 552 by limiting its movement in the forward / backward and left / right directions, thereby achieving gear shift adjustment.

[0079] According to some embodiments of the present invention, the lower side of the other end of the headrest bracket 200 is provided with a plurality of sliding parts 210, and the connecting plate 310 is provided with a plurality of first guide grooves 311. The first guide grooves 311 extend in the front-back direction and are arranged in the left-right direction. The plurality of sliding parts 210 are connected to the plurality of first guide grooves 311 in a corresponding manner.

[0080] With this configuration, the lower side of the other end of the headrest bracket 200 is provided with multiple sliding portions 210. The connecting assembly 300 is adapted to connect with the chair back. The connecting plate 310 is provided with multiple first guide grooves 311, which extend along the length direction of the connecting plate 310. The multiple first guide grooves 311 are arranged along the length direction and / or width direction of the connecting plate 310. The multiple sliding portions 210 are connected one-to-one within the multiple first guide grooves 311. In addition, the headrest bracket 200 can be located on the rear side of the headrest frame 100, and the left and right sides of the front end of the headrest bracket 200 can be rotatably connected to the left and right sides of the headrest frame 100, respectively. The connecting assembly 300 can be connected to the lower side of the rear end of the headrest bracket 200.

[0081] In addition, a second stop 220 is provided on the lower side of the other end of the headrest bracket 200. The headrest bracket 200 slides backward relative to the connecting plate 310 until the second stop 220 engages with the stop of the connecting plate 310. At this time, the headrest bracket 200 slides backward to its limit position, and at the same time, the deformation of the first elastic member 400 reaches its maximum.

[0082] According to some embodiments of the present invention, the connecting bracket 320 is provided with a second guide groove 321, the second guide groove 321 extends in the front-back direction and is arranged in the left-right direction, and the two ends of the connecting plate 310 are provided in the second guide groove 321 and can slide back and forth.

[0083] An ergonomic chair according to a second aspect of the present invention includes: a chair back and a headrest 1, wherein the headrest 1 is connected to the chair back.

[0084] According to the ergonomic chair of this utility model, the headrest 1 of the above embodiment of this utility model allows the user to choose between adaptive adjustment or level adjustment according to their leaning needs. When the user needs to adjust the headrest frame 100 forward, the level adjustment mechanism 500 can be adjusted to meet the user's leaning requirements. When the user's head leans back against the headrest frame 100, adaptive adjustment is performed. This increases the range of travel of the headrest frame 100 in the forward and backward positions, and both adjustment methods provide a stable posture and good support, giving the headrest 1 of this utility model the advantages of both adjustment flexibility and support stability.

[0085] 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.

[0086] 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.

[0087] 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 (100); A headrest bracket (200), one end of which is connected to the headrest frame (100); A connecting assembly (300) is adapted to be connected to a chair back. The connecting assembly (300) is supported on the lower side of the other end of the headrest bracket (200). The connecting assembly (300) includes a connecting plate (310) and a connecting bracket (320). The lower side of the other end of the headrest bracket (200) is slidably connected to the connecting plate (310) in the front-back direction. The connecting plate (310) is slidably connected to the upper side of the connecting bracket (320) in the front-back direction. A first elastic element (400) is connected to the other end of the connecting plate (310) and the headrest bracket (200) respectively, and is used to provide an elastic force to drive the headrest bracket (200) to move forward relative to the connecting plate (310); A gear adjustment mechanism (500) includes a gear slot (510) and a gear slider (520). The gear slot (510) is located on the lower side of the connecting plate (310) and has a plurality of gear openings (511). The gear slider (520) is located on the upper side of the connecting bracket (320). When the headrest frame (100) is compressed, the headrest bracket (200) slides backward relative to the connecting plate (310), and under the action of the first elastic element (400), the headrest (1) adaptively adjusts according to the pressure; or, When the headrest frame (100) is moved forward, the connecting plate (310) slides forward relative to the connecting bracket (320), causing the gear slider (520) to engage in any of the gear slots (511).

2. The headrest (1) according to claim 1, characterized in that, The front end of the connecting plate (310) is provided with a limiting part (313). When the gear slider (520) is in the initial gear position of the gear adjustment mechanism (500), the limiting part (313) is in a limiting cooperation with the connecting bracket (320). The initial gear position of the gear adjustment mechanism (500) is the first gear slot (511) at the frontmost end of the gear slot (510) where the gear slider (520) is located.

3. The headrest (1) according to claim 1, characterized in that, The gear adjustment mechanism (500) further includes a second elastic element (530), which is disposed on the upper side of the connecting bracket (320) and is used to provide an elastic force to drive the gear slider (520) into the gear slot (511).

4. The headrest (1) according to claim 3, characterized in that, The gear adjustment mechanism (500) includes: a first groove (540), the first groove (540) being disposed on the upper side of the connecting bracket (320), the gear slider (520) and the second elastic member (530) being disposed in the first groove (540), the first end of the gear slider (520) being movably connected to the first groove (540), and one side of the second end abutting against the second elastic member (530) and being engaged in the gear slot (511) under the elastic force of the second elastic member (530).

5. The headrest (1) according to claim 4, characterized in that, The upper side of the second end of the gear slider (520) is provided with a first protrusion (521) protruding from the groove of the first groove (540), and the first protrusion (521) is inserted into the gear groove (511).

6. The headrest (1) according to claim 4, characterized in that, The gear adjustment mechanism (500) includes: a second groove (550), the second groove (550) being disposed at the bottom of the first groove (540), the second groove (550) having a gear position slot (551) and a shift slot (552) in the left and right directions, and a second protrusion (522) protruding from the bottom of the first groove (540) on the lower side of the second end of the gear slider (520), the second protrusion (522) switching positions between the gear position slot (551) and the shift slot (552).

7. The headrest (1) according to claim 6, characterized in that, The gear slot (510) has a first straight edge (512) on one side opposite to the left and right sides and a curved edge (513) on the other side, and the curved edge (513) forms a plurality of the gear slot openings (511). When the second end of the gear slider (520) is engaged in the gear slot (511), the second protrusion (522) is located in the gear slot (551). When the second end of the gear slider (520) slides out of the gear slot (511), the second protrusion (522) is located in the gear shift slot (552).

8. The headrest (1) according to claim 7, characterized in that, The gear slot (510) is provided with a second straight edge (514) on the side opposite to the first straight edge (512). The second straight edge (514) is parallel to the first straight edge (512), and the front end of the second straight edge (514) is connected to the rear end of the curved edge (513). The rear end of the curved edge (513) is inclined backward and connected to the second straight edge (514). The connecting plate (310) is provided with a first stop (314), the upper end of the first stop (314) is fixed on the connecting plate (310), and the lower end of the first stop (314) is placed in the groove between the first straight line and the second straight line edge (514) for selectively stopping with the gear slider (520).

9. The headrest (1) according to claim 7, characterized in that, The first groove (540) is provided with a protrusion (560), the first end of the gear slider (520) forms a strip-shaped through hole (523), the first end of the gear slider (520) is sleeved on the protrusion (560) through the strip-shaped through hole (523), the gear shifting slot (552) is set forward relative to the gear slot (551), and the second protrusion (522) moves in the second groove (550).

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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