Lifting headrest

Abstract

The utility model discloses a lifting headrest which comprises a front cover and a rear cover, and the front cover and the rear cover are connected to form an inner cavity. The supporting plate is connected with the backrest and extends into the inner cavity, a vertical guide groove is formed in the middle of the supporting plate, a plurality of limiting sliding grooves formed by pits distributed in the vertical direction are formed in one side or two sides of the guide groove, and the limiting sliding grooves are located in the side, away from the rear cover, of the supporting plate. The headrest is simple in structure, the lifting adjusting mechanism used for adjusting the height is hidden in the inner cavity of the headrest formed by the front cover and the rear cover, the problem that hair leaning on the headrest or other articles worn on the head are easily clamped in a gap when the lifting adjusting mechanism moves relatively is solved, and the headrest is good in safety and high in stability.

Description

Technical Field

[0001] The utility model relates to the field of seat headrests, in particular to a liftable headrest. Background Art

[0002] For office workers who sit for a long time, the neck is the most vulnerable part to fatigue and discomfort. At present, in order to relieve neck discomfort, seats are designed and installed with headrests. However, due to the different heights of each person, it is impossible to well adapt to different people, so the headrest needs to be designed as a liftable structure.

[0003] In the existing headrest lift structure, usually a lift rod is arranged below the headrest body, and a slot matching with the lift rod is arranged behind the chair back. The lift rod is inserted into the slot, and through an elastic limiting mechanism arranged outside the slot, the adjustment and locking of the height position of the headrest are realized. However, this structure is not very convenient for adjusting the lift, and in order to adjust the headrest to a position really suitable for the head, usually the headrest needs to be adjusted again on the headrest. And because the pillow rod moving up and down is exposed outside, during its lifting process, the user's hair is prone to move along with it, resulting in the gap of the relative movement between the pillow rod and the slot being easily stuck with the hair leaning on the headrest or other ornaments worn on the head, which not only affects the use experience, but also has certain potential safety hazards. Summary of the Utility Model

[0004] The utility model provides a liftable headrest with a simple structure, which can quickly lift and adjust the height and can avoid foreign objects being stuck in the lifting mechanism during lifting.

[0005] The liftable headrest described in the utility model includes a front cover and a rear cover, and the front cover and the rear cover are connected to form an internal cavity; a support plate, the support plate is connected to the backrest and extends into the internal cavity. A vertical guide groove is arranged in the middle of the support plate, and a limiting chute formed by a plurality of pits arranged in the vertical direction is arranged on one side or both sides of the guide groove. The limiting chute is located on the side of the support plate far from the rear cover; the rear cover is provided with a guide post passing through the guide groove and capable of moving vertically along the guide groove, and a fastener is installed on the guide post. The guide post and the fastener clamp the support plate, and the fastener is provided with an elastic protrusion portion which is in fit connection with the limiting chute formed by the pits, and by the protrusion portion being in fit connection with different limiting chutes, the rear cover is fixed at different heights on the support plate.

[0006] Further, left and right guide grooves are respectively arranged on both sides of the guide groove on the support plate, and left and right guide posts passing through the left and right guide grooves respectively are arranged on the rear cover.

[0007] Further, the lengths of the left and right guide grooves are consistent with the lengths of the plurality of limiting chutes in the vertical direction.

[0008] Further, the pit is arc-shaped, and a plurality of arc-shaped pits are connected to form a wavy limiting chute. The shape of the convex part is arc-shaped and adapted to the arc-shaped pit.

[0009] Further, a fixing groove is provided in the middle of the guiding column, and an installation block inserted and fixed on the fixing groove is provided in the middle of the fastener. An elastic member is provided on one side of the fastener facing the limiting chute, and a convex part protruding outward in the direction of the rear cover and abutting against the limiting chute is provided on the elastic member.

[0010] Further, the elastic member is a sheet-shaped elastic piece.

[0011] Further, the connection between two adjacent pits of the limiting chute is in arc transition; the end of the convex part is an arc.

[0012] Further, a plurality of raised support ribs that fit the surface of the support plate are vertically provided on the rear cover.

[0013] Further, a connecting column is provided on the side of the rear cover close to the front cover. The front cover is provided with a connection hole corresponding to the connecting column. The diameter of the connection hole is larger than the diameter of the connecting column. The inner wall of the connection hole protrudes forward and forms an annular retaining cap around the connecting column. The edge of the end of the connecting column slightly protrudes from the edge of the annular retaining cap.

[0014] Further, an angle adjustment mechanism for adjusting the angle of the headrest is further included. The angle adjustment mechanism includes a hinge seat connected to the backrest. The hinge seat is symmetrically provided with a rotating shaft bracket. An installation groove for placing an elastic convex block is provided between the two rotating shaft brackets. A connecting part hinged to the hinge seat is further provided at the lower part of the support plate. A rotating shaft placed between the two rotating shaft brackets is provided on the connecting part. A plurality of limiting grooves distributed circumferentially along the arc surface of the rotating shaft are provided in the middle of the rotating shaft. The elastic convex block in the installation groove abuts against the limiting groove, so as to guide the rotating shaft to rotate relative to the rotating shaft bracket and abut and fix at different angles.

[0015] Further, a translation mechanism for adjusting the front-back distance of the headrest is further included. The translation mechanism includes a sliding seat, a sliding plate moving relative to the sliding seat, and a fixing component for fixing the sliding plate at any position of the sliding seat. The sliding seat includes an upper cover and a lower cover that are relatively closed. The lower cover is provided with a guide groove for accommodating the sliding plate and allowing the sliding plate to move back and forth. The upper cover is provided with a chamber for installing a fixing member. A rotating shaft bracket for installing the headrest angle adjustment mechanism is symmetrically provided at one end of the upper cover. A plurality of tooth and alveolar grooves are arranged along the translation direction on the sliding plate. The fixing component includes two symmetrically arranged buttons passing through the side plates of the upper cover. The two buttons are connected by a compression spring. A clamping convex for buckling into the tooth and alveolar groove is provided downward on the button.

[0016] Further, it further includes a second lifting mechanism for increasing the lifting range of the headrest. The second lifting mechanism includes a fixed seat connected to the backrest, a lifting plate penetrating through the fixed seat and moving up and down relative to the fixed seat, and an elastic clamping component installed on the fixed seat for fixing the lifting plate at any position on the fixed seat. The top of the lifting plate is connected to one end of the sliding plate of the translation mechanism. The lifting plate is vertically provided with a lifting chute, and several teeth are vertically arranged inside the lifting chute. An elastic clamping component is arranged on the fixed seat and is movably clamped and matched with the teeth. The elastic clamping component includes a fixing plate installed on the fixed seat, and an elastic protrusion for movably clamping with the teeth is arranged in the middle of the fixing plate.

[0017] For the lift headrest, the support plate extends into the internal cavity formed by the front cover and the rear cover being combined. Guide columns and guide grooves that cooperate with each other are respectively arranged on the rear cover and the support plate, so that the rear cover can move vertically relative to the support plate. Relying on the elastic protrusion on the fastener, the elastic deformation of the protrusion can be clamped into the limit chutes at different heights on the support plate, and due to its elasticity, the protrusion can be closely abutted against the limit chute to achieve fixation, keeping the headrest at the current height, thereby completing the rapid height adjustment of the headrest, being applicable to people of different heights, and improving the comfort of the headrest. The structure of the present utility model is simple. The lift adjustment mechanism for adjusting the height is hidden in the internal cavity of the headrest formed by the front cover and the rear cover, avoiding the problem that the gap during the relative movement of the lift adjustment mechanism is easily caught by the hair leaning on the headrest or other ornaments worn on the head, with good safety and high stability. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of a lift headrest.

[0019] Figure 2 It is a schematic overall structural diagram of a lift headrest.

[0020] Figure 3 It is an exploded schematic diagram of the headrest part of a lift headrest Figure 1 。

[0021] Figure 4 It is an exploded schematic diagram of the headrest part of a lift headrest Figure 2 。

[0022] Figure 5 It is a schematic structural diagram of the fastener.

[0023] Figure 6 It is a schematic structural diagram of the support plate.

[0024] Figure 7 It is an exploded schematic diagram of part of the angle adjustment mechanism of a lift headrest Figure 1 。

[0025] Figure 8 Exploded view of part of the angle adjustment mechanism of a lift headrest Figure 2 。

[0026] Figure 9 Exploded view of part of the translation mechanism of a lift headrest

[0027] Figure 10 Exploded view of part of the second lifting mechanism of a lift headrest Specific implementation manner

[0028] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0029] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection" and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0030] Such as Figures 1-5As shown in the figure, a liftable headrest includes a front cover 1 and a rear cover 2. The front cover 1 and the rear cover 2 are connected to form an internal chamber; a support plate 3, which is connected to the backrest and extends into the internal chamber. A vertical guide groove 301 is provided in the middle of the support plate 3. One side or both sides of the guide groove are provided with a plurality of limiting sliding grooves 302 formed by pits arranged in the vertical direction. The limiting sliding grooves 302 are located on the side of the support plate 3 away from the rear cover 2; the rear cover 2 is provided with a guide post 201 that passes through the guide groove and can move vertically along the guide groove. A fastener 202 is installed on the guide post 201. The guide post 201 and the fastener 202 clamp the support plate 3. The fastener 202 is provided with an elastic protrusion 203 that cooperates with the pit-formed limiting sliding groove for abutment. By abutting the protrusion against different limiting sliding grooves, the rear cover is fixed at different heights of the support plate. By extending the support plate into the internal chamber formed by the relative combination of the front cover and the rear cover, and respectively providing a mutually cooperating guide post and guide groove on the rear cover and the support plate, the rear cover can move vertically relative to the support plate, and relying on the elastic protrusion on the fastener, the elastic deformation of the protrusion can be snapped into the limiting sliding grooves at different heights of the support plate, and due to its elasticity, the protrusion can be closely abutted against the limiting sliding groove to achieve fixation, keeping the headrest at the current height, thus completing the quick height adjustment of the headrest, being applicable to people of different heights, and improving the comfort of the headrest. The structure of the present utility model is simple. The lift adjustment mechanism for adjusting the height is hidden in the internal chamber of the headrest formed by the front cover and the rear cover, avoiding the problem that the gap during the relative movement of the lift adjustment mechanism is easily caught by the hair leaning on the headrest or other ornaments worn on the head, with good safety and high stability.

[0031] On both sides of the guide groove on the support plate 3, a left guide groove 303 and a right guide groove 304 are respectively provided. On the rear cover 2, a left guide post 204 and a right guide post 205 that respectively pass through the left guide groove and the right guide groove are provided. The lengths of the left guide groove and the right guide groove are consistent with the lengths of the plurality of limiting sliding grooves in the vertical direction. Since when adjusting the height of the headrest, the direction and magnitude of the force applied by a person are uneven, the left guide groove and the right guide groove respectively provided on both sides of the guide groove can play a role in symmetric guiding and force dispersion, preventing the headrest from swinging left and right. By making the lengths of the left guide groove and the right guide groove consistent with the lengths of the plurality of sliding grooves arranged at intervals in the vertical direction, the height of the headrest lift can be limited, preventing the headrest from being too high or too low.

[0032] The pits are arc-shaped, and a plurality of arc-shaped pits are connected to form a wavy limiting sliding groove 302. The shape of the protrusion 203 is arc-shaped and adapted to the arc-shaped pits, such as Figure 5 and Figure 6As shown; or the pit is triangular in shape, and a plurality of triangular pits are connected to form a serrated limit chute 302, and the shape of the convex portion 203 is a convex tooth shape adapted to the triangular pit.

[0033] A fixing groove 206 is provided in the middle of the guide post 201. An installation block 207 inserted and fixed on the fixing groove is provided in the middle of the fastener 202. An elastic member 208 is provided on one side of the fastener facing the limit chute, and a convex portion 203 that protrudes outward in the direction of the rear cover and abuts against the limit chute is provided on the elastic member; further, the elastic member 208 is a sheet-shaped elastic sheet. By detachably installing the fastener on the guide post, it is convenient for assembly. As another embodiment, the fastener can also be fixed on the guide post by screws. For example, screw through holes are provided on the upper and lower sides of the installation block of the fastener, and threaded holes with threads are provided at the corresponding positions of the guide post, and the fastener is fixedly installed on the guide post through the cooperation of the screws.

[0034] The connection between two adjacent pits of the limit chute is arc-shaped; the end of the convex portion is arc-shaped, so that the convex portion can move back and forth more smoothly between adjacent limit chutes, thereby completing the rapid adjustment of the height of the headrest.

[0035] A plurality of raised support ribs 209 that fit the surface of the support plate are vertically provided on the rear cover 2. With the support of the support ribs, the friction area between the support plate and the rear cover is reduced, which is beneficial to the relative movement of the support plate with respect to the rear cover.

[0036] A connecting column 210 is provided on the rear cover 2 near the front cover. The front cover 1 is provided with a connection hole 101 corresponding to the connecting column. The diameter of the connection hole is larger than the diameter of the connecting column. The inner wall of the connection hole protrudes forward and forms an annular retaining cap 102 around the connecting column. The end of the connecting column slightly protrudes from the edge of the annular retaining cap, so as to enable the rapid fixed installation of the front cover and the rear cover.

[0037] As Figure 7 shown, it further includes an angle adjustment mechanism 4 for adjusting the angle of the headrest. The angle adjustment mechanism includes a hinge seat 401 connected to the backrest. The hinge seat is symmetrically provided with rotating shaft brackets 402. An installation groove 404 for placing an elastic convex block 403 is provided between the two rotating shaft brackets. A connecting portion 305 hinged to the hinge seat is further provided at the lower part of the support plate 3. The connecting portion is provided with a rotating shaft 306 placed between the two rotating shaft brackets. A plurality of limiting grooves 307 distributed circumferentially along the arc surface of the rotating shaft are provided in the middle of the rotating shaft. The elastic convex block 403 in the installation groove abuts against the limiting grooves 307, so as to guide the rotation of the rotating shaft relative to the rotating shaft bracket and abut and fix at different angles, realizing the angle adjustment of the headrest and fixing it at any angle.

[0038] As Figure 8 and Figure 9As shown in the figure, it further includes a translation mechanism for adjusting the front-back distance of the headrest. The translation mechanism includes a sliding seat 5, a sliding plate 6 that moves relative to the sliding seat, and a fixing component 7 for fixing the sliding plate at any position of the sliding seat. The sliding seat 5 includes an upper cover 501 and a lower cover 502 that are relatively closed. The lower cover is provided with a guide groove 503 for accommodating the sliding plate and allowing the sliding plate to move back and forth. The upper cover is provided with a chamber 504 for installing fixing parts. One end of the upper cover is also symmetrically provided with a rotating shaft bracket 402 for installing the headrest angle adjustment mechanism. A plurality of tooth grooves 601 are arranged on the sliding plate 6 along the translation direction. The fixing component 7 includes two symmetrically arranged buttons 701 that pass through the side plates of the upper cover. The two buttons are connected by a compression spring 702. The button extends downward and is provided with a convex that snaps into the tooth groove. For the translation mechanism, by pressing the button, the two buttons move relatively closer, and the spring arranged between the two buttons is compressed. The convex is pushed out of the tooth groove, and then the sliding plate can move relative to the sliding seat, thereby realizing the adjustment of the front-back distance of the headrest. After the sliding plate moves an appropriate distance, release the button. The compression spring returns under the action of elasticity, and the convex snaps into the tooth groove to hold the sliding plate, so that the sliding plate remains fixed relative to the sliding seat.

[0039] As Figure 10 shown in the figure, it further includes a second lifting mechanism for increasing the lifting range of the headrest. The second lifting mechanism includes a fixed seat 8 connected to the backrest, a lifting plate 9 that penetrates through the fixed seat and moves up and down relative to the fixed seat, and an elastic clamping component 10 installed on the fixed seat for fixing the lifting plate at any position on the fixed seat. The top of the lifting plate is connected to one end of the sliding plate of the translation mechanism. The lifting plate 9 is vertically provided with a lifting chute 901, and a plurality of teeth 902 are vertically arranged inside the lifting chute. An elastic clamping component is arranged on the fixed seat 8 to be movably clamped and matched with the teeth. The elastic clamping component 10 includes a fixing plate 1001 installed on the fixed seat. The middle of the fixing plate is provided with an elastic protrusion 1002 that is movably clamped with the teeth. The elastic protrusion can be made of an elastic material, such as silicone, or a compression spring can be arranged between the elastic protrusion and the fixing plate. On the lifting plate 9 on both sides of the lifting chute 901, guide chutes 903 are also symmetrically arranged, and on the fixed seat 8, there are sliders 801 that cooperate with the guide chutes. By slightly pulling the lifting plate with a little force for the elastic clamping component, the teeth can squeeze the elastic protrusion, so that the lifting plate moves up and down relative to the fixed seat. Under the elastic recovery action of the elastic protrusion itself, the teeth can be clamped again to achieve positioning and fixing. For the second lifting mechanism, through the cooperation of the lifting plate, the fixed seat and the elastic clamping component, the movable clamping and positioning of the lifting plate for lifting adjustment can be realized, and the operation is simple and convenient, so that the height lifting range of the headrest can be further increased.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A lifting headrest, characterized in that: The invention comprises a front cover (1) and a rear cover (2), wherein the front cover (1) and the rear cover (2) are connected to form an internal chamber; a support plate (3), wherein the support plate (3) is connected to the backrest and extends into the internal chamber, wherein a vertical guide groove (301) is provided in the middle of the support plate (3), and a limiting slide groove (302) formed by a plurality of pits arranged in a vertical direction is provided on one side or both sides of the guide groove, and the limiting slide groove (302) is located on a side of the support plate (3) away from the rear cover (2); The rear cover (2) is provided with a guide column (201) passing through the guide groove and movable in the vertical direction of the guide groove, and a fastener (202) is installed on the guide column (201). The guide column (201) and the fastener (202) clamp the support plate (3), and the fastener (202) is provided with an elastic protrusion (203) that cooperates and abuts with a limiting slide groove formed by a pit, and the rear cover is fixed at different heights of the support plate by the protrusion cooperating and abutting on different limiting slide grooves.

2. The lifting headrest according to claim 1, characterized in that: A left guide groove (303) and a right guide groove (304) are respectively provided on both sides of the guide groove on the support plate (3), and a left guide column (204) and a right guide column (205) are respectively provided on the rear cover (2) and pass through the left guide groove and the right guide groove.

3. The lifting headrest according to claim 2, characterized in that: The lengths of the left guide groove and the right guide groove are consistent with the lengths of the plurality of limiting sliding grooves along the vertical direction.

4. The lifting headrest according to claim 1, characterized in that: The pit is in an arc shape, and a plurality of arc-shaped pits are connected to form a wave-shaped limiting sliding groove (302), and the shape of the protrusion (203) is an arc shape that matches the arc-shaped pit.

5. The lifting headrest according to claim 1, characterized in that: A fixing groove (206) is provided in the middle of the guide column (201), a mounting block (207) inserted and fixed in the fixing groove is provided in the middle of the fastener (202), an elastic member (208) is provided on the side of the fastener facing the limiting slide groove, and a protrusion (203) is provided on the elastic member protruding outward in the direction of the rear cover and abutting against the limiting slide groove.

6. The lifting headrest according to claim 5, characterized in that: The elastic member (208) is a sheet-shaped elastic sheet.

7. The lifting headrest according to claim 1, characterized in that: The connection between two adjacent pits of the limiting slide groove is an arc transition; the end of the protrusion is an arc.

8. The lifting headrest according to claim 1, characterized in that: The rear cover (2) is vertically provided with a plurality of raised support ribs (209) which are in contact with the surface of the support plate.

9. The lifting headrest according to claim 1, characterized in that: The rear cover (2) is provided with a connecting column (210) on one side close to the front cover, and the front cover (1) is provided with a connecting hole (101) corresponding to the connecting column, the diameter of the connecting hole is larger than the diameter of the connecting column, the inner wall of the connecting hole protrudes forward and an annular stop cap (102) is formed around the connecting column, and the end of the connecting column slightly protrudes from the edge of the annular stop cap.

10. The lifting headrest according to any one of claims 1 to 9, characterized in that: It also includes an angle adjustment mechanism (4) for adjusting the angle of the headrest, the angle adjustment mechanism including an articulated seat (401) connected to the seat back, the articulated seat being symmetrically provided with a rotating shaft bracket (402), a mounting groove (404) for accommodating an elastic protrusion (403) being provided between the two rotating shaft brackets, a connecting portion (305) being hinged to the articulated seat being provided at the lower portion of the support plate (3), the connecting portion being provided with a rotating shaft (306) arranged between the two rotating shaft brackets, a plurality of limiting grooves (307) distributed along the circumference of the rotating shaft arc surface being provided at the middle portion of the rotating shaft, the elastic protrusion (403) in the mounting groove being in abutment with the limiting groove (307), thereby guiding the rotating shaft to rotate relative to the rotating shaft bracket and being abutted and fixed at different angles.

11. The lifting headrest according to any one of claims 1 to 9, characterized in that: The invention also comprises a translation mechanism for adjusting the front-to-back distance of the headrest, the translation mechanism comprising a slide seat (5), a slide plate (6) movable relative to the slide seat, and a fixing assembly (7) for fixing the slide plate at any position of the slide seat, the slide seat (5) comprising an upper cover (501) and a lower cover (502) which cover each other, the lower cover being provided with a guide groove (503) for accommodating the slide plate and for the slide plate to move back and forth, the upper cover being provided with a chamber (504) for installing a fixing member, one end of the upper cover being symmetrically provided with a rotating shaft bracket (402) for installing the headrest angle adjustment mechanism, the slide plate (6) being provided with a plurality of tooth grooves (601) arranged along the translation direction, the fixing assembly (7) comprising two symmetrically arranged buttons (701) extending from two side plates of the upper cover, the two buttons being connected by a compression spring (702), the buttons extending downwardly being provided with a locking protrusion (703) for snapping into the tooth groove.

12. The lifting headrest according to any one of claims 1 to 9, characterized in that: The invention also comprises a second lifting mechanism for increasing the lifting range of the headrest, the second lifting mechanism comprising a fixed seat (8) connected to the backrest, a lifting plate (9) penetrating through the fixed seat and moving up and down relative to the fixed seat, and an elastic clamping assembly (10) mounted on the fixed seat and used to fix the lifting plate at any position on the fixed seat, the top of the lifting plate is connected to one end of the slide plate of the translation mechanism, the lifting plate (9) is vertically provided with a lifting slot (901), a plurality of teeth (902) are vertically provided inside the lifting slot, an elastic clamping assembly is provided on the fixed seat (8) and is movably clamped with the teeth, the elastic clamping assembly (10) comprises a fixed plate (1001) mounted on the fixed seat, and an elastic protrusion (1002) movably clamped with the teeth is provided in the middle of the fixed plate.

13. The lifting headrest according to claim 10, characterized in that: The invention also comprises a translation mechanism for adjusting the front-to-back distance of the headrest, the translation mechanism comprising a slide seat (5), a slide plate (6) movable relative to the slide seat, and a fixing assembly (7) for fixing the slide plate at any position of the slide seat, the slide seat (5) comprising an upper cover (501) and a lower cover (502) which cover each other, the lower cover being provided with a guide groove (503) for accommodating the slide plate and for the slide plate to move back and forth, the upper cover being provided with a chamber (504) for installing a fixing member, one end of the upper cover being symmetrically provided with a rotating shaft bracket (402) for installing the headrest angle adjustment mechanism, the slide plate (6) being provided with a plurality of tooth grooves (601) arranged along the translation direction, the fixing assembly (7) comprising two symmetrically arranged buttons (701) extending from two side plates of the upper cover, the two buttons being connected by a compression spring (702), the buttons extending downwardly being provided with a locking protrusion (703) for snapping into the tooth groove.

14. The lifting headrest according to claim 12, characterized in that: The invention also comprises a translation mechanism for adjusting the front-to-back distance of the headrest, the translation mechanism comprising a slide seat (5), a slide plate (6) movable relative to the slide seat, and a fixing assembly (7) for fixing the slide plate at any position of the slide seat, the slide seat (5) comprising an upper cover (501) and a lower cover (502) which cover each other, the lower cover being provided with a guide groove (503) for accommodating the slide plate and for the slide plate to move back and forth, the upper cover being provided with a chamber (504) for installing a fixing member, one end of the upper cover being symmetrically provided with a rotating shaft bracket (402) for installing the headrest angle adjustment mechanism, the slide plate (6) being provided with a plurality of tooth grooves (601) arranged along the translation direction, the fixing assembly (7) comprising two symmetrically arranged buttons (701) extending from two side plates of the upper cover, the two buttons being connected by a compression spring (702), the buttons extending downwardly being provided with a locking protrusion (703) for snapping into the tooth groove.

15. The lifting headrest according to claim 10, characterized in that: The invention also comprises a second lifting mechanism for increasing the lifting range of the headrest, the second lifting mechanism comprising a fixed seat (8) connected to the backrest, a lifting plate (9) penetrating through the fixed seat and moving up and down relative to the fixed seat, and an elastic clamping assembly (10) mounted on the fixed seat and used to fix the lifting plate at any position on the fixed seat, the top of the lifting plate is connected to one end of the slide plate of the translation mechanism, the lifting plate (9) is vertically provided with a lifting slot (901), a plurality of teeth (902) are vertically provided inside the lifting slot, an elastic clamping assembly is provided on the fixed seat (8) and is movably clamped with the teeth, the elastic clamping assembly (10) comprises a fixed plate (1001) mounted on the fixed seat, and an elastic protrusion (1002) movably clamped with the teeth is provided in the middle of the fixed plate.

16. The lifting headrest according to claim 13, characterized in that: The invention also comprises a second lifting mechanism for increasing the lifting range of the headrest, the second lifting mechanism comprising a fixed seat (8) connected to the backrest, a lifting plate (9) penetrating through the fixed seat and moving up and down relative to the fixed seat, and an elastic clamping assembly (10) mounted on the fixed seat and used to fix the lifting plate at any position on the fixed seat, the top of the lifting plate is connected to one end of the slide plate of the translation mechanism, the lifting plate (9) is vertically provided with a lifting slot (901), a plurality of teeth (902) are vertically provided inside the lifting slot, an elastic clamping assembly is provided on the fixed seat (8) and is movably clamped with the teeth, the elastic clamping assembly (10) comprises a fixed plate (1001) mounted on the fixed seat, and an elastic protrusion (1002) movably clamped with the teeth is provided in the middle of the fixed plate.

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