Adjustable headrest

Abstract

The utility model relates to an adjustable headrest, relates to the technical field of chair headrests, aims to solve the problem that the adjusting space of the current chair headrest is low in adaptability to the head of a human body, and adopts the technical scheme that the adjustable headrest comprises a backrest mounting piece, a double-end rotating piece, a headrest connecting piece and a headrest piece, the two ends of the double-end rotating piece are hinged to the backrest mounting piece and the headrest connecting piece respectively, and position locking mechanisms are arranged at the connecting positions of the double-end rotating piece and the backrest mounting piece and the headrest connecting piece; the headrest part is provided with a sliding groove mechanism. The headrest connecting piece is adjustably connected with the sliding groove mechanism of the headrest connecting piece through the rotary positioning sliding block. According to the adjustable headrest, the rotating range and the number of rotating axes are increased through the double-end transmission piece, the height is independently adjusted by rotating the positioning sliding block, the adaptive space range of the headrest is expanded, the adjustable headrest is suitable for people of different heights and body types to use, and a user can conveniently adjust the adjustable headrest to a proper position to lean on the adjustable headrest.

Description

Technical Field

[0001] The utility model relates to the technical field of chair headrests, in particular to an adjustable headrest. Background Art

[0002] A headrest is a pillow-shaped device on the upper part of the seat back that restrains the head from leaning back relative to the torso. It is currently commonly used in ergonomic seats, vehicle seats and other fields. The headrest can often be installed and removed separately from the seat. The function of the headrest is to provide support for the head and neck when the human body sits on a chair. It has the functions of protecting the vulnerable parts of the human body and correcting sitting posture. However, the headrests currently on the market have a relatively fixed installation position, and generally only have a first-level rotating structure to adjust the angle of the headrest. It is difficult for people of different heights and body shapes to obtain good comfort.

[0003] Therefore, a solution needs to be proposed to solve this problem. Utility Model Content

[0004] The purpose of the utility model is to solve the problems in the background technology and provide an adjustable headrest.

[0005] The above technical purpose of the utility model is achieved through the following technical solutions: an adjustable headrest, comprising a backrest mounting member, a double-end rotating member, a headrest connecting member and a headrest member; the two ends of the double-end rotating member are respectively hinged to the backrest mounting member and the headrest connecting member, and a position locking mechanism is provided at the connection between the double-end rotating member and the backrest mounting member and the headrest connecting member; the headrest member is provided with a slide mechanism; the headrest connecting member is adjustably connected to the slide mechanism of the headrest connecting member by rotating a positioning slider.

[0006] By adopting the above technical solution, a multi-stage rotation effect is obtained, and the headrest portion can be independently adjusted in height, so that the entire headrest has a larger adjustment range and adaptability space.

[0007] The utility model is further configured as follows: both ends of the rotation positioning slider are hinged to the headrest connecting piece, a limit plate is arranged on the rotation positioning slider toward the headrest connecting piece, and the headrest connecting piece is correspondingly provided with a limit groove for limiting the rotation angle of the limit plate.

[0008] By adopting the above technical solution, the rotation track range of the rotation positioning slider is limited, and the stability after adjustment and the supporting effect on the human body are enhanced.

[0009] The utility model is further configured as follows: the position locking mechanism includes a locking tooth and a locking compression spring; the backrest mounting member and the headrest connecting member are respectively provided with a locking space 1 and a locking space 2 for installing the position locking mechanism toward the double-end rotating member; and the surface of the double-end rotating member is provided with a plurality of gear teeth corresponding to the locking tooth.

[0010] By adopting the above technical solution, the deformation of the locking compression spring is used to provide a supporting force, and the engagement of the latch teeth and the lock teeth strengthens the resistance and supporting force against human body leaning, thereby enhancing the overall stability.

[0011] The utility model is further configured as follows: an anti-shake convex strip is arranged on the outer side of the lock tooth.

[0012] By adopting the above technical solution, the anti-shake convex strip is used to fill the gap between the lock tooth and the locking space one or the locking space two, thereby playing a role in maintaining the stability of the overall structure of the headrest.

[0013] The utility model is further configured as follows: the surface of the locking tooth is a curved surface, and the shape of the latching tooth fits the locking tooth.

[0014] By adopting the above technical solution, the rotation adjustment is easy and controllable, and at the same time, the service life of the locking teeth and the latching teeth is extended and the stability is improved.

[0015] The utility model is further configured as follows: the rotating positioning sliding block comprises a sliding bottom plate and an abutment block, a positioning spring block is arranged on the inner side of the sliding bottom plate, and a guide block is arranged on the outer side.

[0016] By adopting the above technical solution, the sliding bottom plate cooperates with the sliding groove mechanism to slide, so as to achieve the height adjustment function between the headrest member and the headrest connecting member.

[0017] The utility model is further configured as follows: the slide mechanism includes a slide plate and a stabilizing member, the stabilizing member is arranged between the abutment blocks, the sliding base plate is arranged between the slide plate and the stabilizing member, a guide groove is arranged on the stabilizing member, and the guide block is slidably connected to the guide groove.

[0018] By adopting the above technical solution, the stabilizing member provides additional directional restrictions to improve the stability of the headrest member during and after height adjustment, and the cooperation of the guide groove and the guide block improves the linear sliding effect of the sliding base plate.

[0019] The utility model is further configured as follows: the slide plate is provided with a plurality of positioning concave points arranged in a straight line toward the inner side of the sliding bottom plate, and the positioning spring blocks are installed in coordination with the positioning concave points.

[0020] By adopting the above technical solution, the positioning concave points and the positioning spring blocks are used for locking, thereby improving the supporting effect on the human body when a person leans on it.

[0021] The utility model is further configured as follows: the backrest mounting member is concave at the connection with the double-end rotating member to form a concave space one, the headrest connecting member is concave at the connection with the double-end rotating member to form a concave space two, and the double-end rotating member is simultaneously arranged in the concave space one and the concave space two.

[0022] By adopting the above technical solution, the key double-end rotating parts are protected by the headrest connecting parts and the backrest mounting parts, thereby enhancing the service life and rotation stability.

[0023] The utility model is further configured as follows: the backrest mounting member includes a clamping area, the clamping area is C-shaped, and a mounting point is arranged at the bottom of the C-shaped clamping area.

[0024] By adopting the above technical solution, the stability of the backrest mounting parts is enhanced, thereby improving the support stability of the overall headrest for the human body.

[0025] In summary, the beneficial effects of the utility model are:

[0026] 1. The adjustable headrest of the utility model provides a wide range of rotation adjustment compared with the traditional backrest structure through a special double-end rotating member structure, and further improves the comfort of the headrest by realizing independent height and angle adjustment of the headrest through a slide mechanism and a rotating positioning slider;

[0027] 2. The adjustable headrest of the utility model improves the stability and support performance of the headrest after adjustment through the design of locking springs, lock teeth, latch teeth, anti-sway convex strips and other structures, and has achieved the comfort level for people of different heights and body shapes. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The structure of the utility model is shown in FIG. Figure 1 ;

[0029] Figure 2 The structure of the utility model is shown in FIG. Figure 2 ;

[0030] Figure 3 for Figure 2 Schematic diagram of the cross section at AA in the middle;

[0031] Figure 4 It is a structural schematic diagram of the backrest mounting member in the utility model;

[0032] Figure 5 A schematic diagram of the structure of the double-end rotating member in the utility model;

[0033] Figure 6 This is a schematic diagram of the structure of the headrest connector in the utility model;

[0034] Figure 7 It is a structural schematic diagram of the rotating positioning slider in the utility model;

[0035] Figure 8 It is a structural schematic diagram of the rotating positioning slider and the headrest member in the utility model;

[0036] Fig. 9 It is a structural schematic diagram of the locking compression spring and the locking teeth in the utility model.

[0037] In the figure: 1. Backrest mounting part; 2. Double-end rotating part; 3. Headrest connecting part; 4. Headrest part; 5. Position locking mechanism; 6. Rotating positioning slider; 11. Locking space one; 12. Concave space one; 13. Clamping area; 131. Mounting point; 21. Clamping tooth; 31. Limiting groove; 32. Locking space two; 35. Concave space two; 36. Concave space three; 41. Slide mechanism; 51. Locking tooth; 52. Locking compression spring; 61. Limiting plate; 62. Sliding bottom plate; 63. Abutment block; 411. Slide plate; 412. Stabilizing member; 413. Positioning concave point; 511. Anti-sway convex strip; 621. Positioning spring block; 622. Guide block; 4121. Guide groove. DETAILED DESCRIPTION

[0038] The following specific embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make modifications to the embodiments without any creative contribution as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

[0039] The present invention will be described in detail below with reference to the accompanying drawings. Example

[0040] An adjustable headrest, such as Figures 1 to 9 As shown, it includes a backrest mounting member 1, a double-end rotating member 2, a headrest connecting member 3 and a headrest member 4; the two ends of the double-end rotating member 2 are respectively hinged to the backrest mounting member 1 and the headrest connecting member 3, and a position locking mechanism 5 is provided at the connection between the double-end rotating member 2 and the backrest mounting member 1 and the headrest connecting member 3; the headrest member 4 is provided with a slide mechanism 41; the headrest connecting member 3 is adjustably connected to the slide mechanism 41 of the headrest connecting member 3 by rotating the positioning slider 6.

[0041] In this embodiment, the snap-in area 13 is C-shaped to engage with the top of the seat back. The snap-in area 13 is provided with two mounting points 131 symmetrical to the snap-in area 13 . The mounting points 131 are fixedly connected to the seat back and the backrest mounting member 1 .

[0042] In this embodiment, the backrest mounting member 1 is recessed at the connection with the double-end rotating member 2 to form a recessed space 12 for accommodating the hinge connection between the two. The double-end rotating member 2 is arranged in the recessed space 12. The extension directions of the rotation axes on the backrest mounting member 1, the double-end rotating member 2, the headrest connecting member 3, and the rotating positioning slider 6 are parallel to each other, that is, the rotation directions of the backrest mounting member 1, the double-end rotating member 2, the headrest connecting member 3, and the rotating positioning slider 6 are in the same plane.

[0043] In this embodiment, the headrest connecting member 3 is recessed at the connection with the double-end rotating member 2 to form a recessed space 2 35 for accommodating the hinge connection between the two. The double-end rotating member 2 is arranged in the recessed space 2 35, and the headrest connecting member 3 is recessed near the connecting member to form a recessed space 3 36 for accommodating the rotating positioning slider 6.

[0044] like Figure 6 , Figure 7 As shown, both ends of the rotating positioning slider 6 are hinged to the headrest connecting member 3, and a limiting plate 61 is arranged on the rotating positioning slider 6 toward the headrest connecting member 3. The headrest connecting member 3 is correspondingly provided with a limiting groove 31 for limiting the rotation angle of the limiting plate 61. The limiting groove 31 is C-shaped and protrudes inward at both ends of the C-shape to form a blockage. The limiting plate 61 rotates in the C-shaped limiting groove 31 and is limited in rotation by the two ends of the C-shape.

[0045] like Figure 2 , Figure 3 , Figure 6 , Fig. 9 As shown, the position locking mechanism 5 includes a locking tooth 51 and a locking compression spring 52; the backrest mounting member 1 and the headrest connecting member 3 are respectively provided with a locking space 11 and a locking space 2 32 for installing the position locking mechanism 5 toward the double-end rotating member 2; the surface of the double-end rotating member 2 is provided with a plurality of gear teeth 21 corresponding to the locking tooth 51

[0046] An embodiment of a position locking mechanism 5 is provided, wherein the position locking mechanism 5 includes a locking space 11 disposed at the connection between the backrest mounting member 1 and the double-end rotating member 2, and the position locking mechanism 5 includes a locking space 2 32 disposed at the connection between the headrest connecting member 3 and the double-end rotating member 2. The bottom walls of the concave space 12 and the concave space 2 35 are further recessed to form the locking space 11 and the locking space 2 32, respectively. A locking compression spring 52 is disposed in the locking space 11 and the locking space 2 32, and a locking tooth 5 is disposed on one side of the locking compression spring 52 away from the bottom of the limiting groove 31. 1. Corresponding latch teeth 21 are arranged on both sides of the double-end rotating member 2 close to the locking teeth 51. The latch teeth 21 of the double-end rotating member 2 mesh with the locking teeth 51. When the double-end rotating member 2 stops rotating, due to the meshing between the latch teeth 21 of the double-end rotating member 2 and the locking teeth 51, the movement between the backrest mounting member 1, the double-end rotating member 2 and the headrest connecting member 3 is locked and limited. The locking teeth 51 extend toward the direction of the locking compression spring 52 and surround the locking compression spring 52. An anti-shake convex strip 511 is arranged on the outer side of the locking tooth 51. The surface of the locking tooth 51 is curved, and the shape of the latch teeth 21 fits the locking tooth 51.

[0047] like Figure 7 , Figure 8 The rotating positioning slider 6 shown includes a sliding base plate 62 and an abutment block 63. A positioning spring block 621 is provided on the inner side of the sliding base plate 62, and a guide block 622 is provided on the outer side. An implementation mode is provided. The slide groove mechanism 41 includes a slide plate 411 as a track and a stabilizing member 412 for stabilizing the movement of the sliding base plate 62. A slide rail is formed between the stabilizing member 412 and the slide plate 411. The sliding base plate 62 is rectangular and arranged in the slide rail. The stabilizing member 412 abuts against the surface of the sliding base plate 62 away from the slide plate 411. A guide groove 4121 is provided on the stabilizing member 412. The guide block 622 is slidably connected to the guide groove 4121. The surface protrusion of the rotating positioning slider 6 forms two abutment blocks 63. The abutment blocks 63 abut against the surface away from the stabilizing member 412. Each abutment block 63 abuts against the guide block 622 to squeeze the stabilizing member 412.

[0048] The slide plate 411 is provided with a plurality of linearly arranged positioning concave points 413 on the inner side facing the sliding bottom plate 62 , and the positioning spring blocks 621 are installed in cooperation with the positioning concave points 413 . In the present embodiment, the number of the positioning concave points 413 is ten.

[0049] like Figure 7 , Figure 8As shown, the surface of the positioning spring block 621 is a curved surface, that is, the surface where the positioning spring block 621 contacts the positioning recess 413 is a nearly spherical surface, and the shape of the positioning recess 413 matches the shape of the positioning spring block 621, so as to reduce friction and facilitate the sliding of the sliding base plate 62. An implementation method is provided, in which the positioning spring block 621 adopts a marble pin. When the sliding base plate 62 moves to the positioning spring block 621 leaving the positioning recess 413, the marble pin is compressed and retracted, thereby reducing the friction between the positioning spring block 621 and the slide rail, which is convenient and labor-saving. When the sliding base plate 62 moves to the positioning spring block 621 entering the positioning recess 413, the marble pin rebounds to position the sliding base plate 62, thereby improving the stability of the headrest 4 in supporting the human body.

[0050] In actual use, the operator installs this embodiment to the matching chair back through the installation point 131, and fastens the backrest mounting part 1 and the chair back through a threaded connection. Then, according to the needs of the user, the double-end rotating part 2, the headrest connecting part 3, the rotating positioning slider 6, and the headrest part 4 are rotated and locked respectively, so that the headrest part 4 is rotated to the position corresponding to the upward position of the human neck and the head, and then the headrest part 4 is slid on the slide groove mechanism 41 to further finely adjust the height, thereby completing the positioning in the space, adapting to users of different heights and body shapes, and allowing users to have a good leaning experience.

[0051] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An adjustable headrest, characterized in that: The invention comprises: a backrest mounting member (1), a double-end rotating member (2), a headrest connecting member (3) and a headrest member (4); the two ends of the double-end rotating member (2) are respectively hinged to the backrest mounting member (1) and the headrest connecting member (3); a position locking mechanism (5) is provided at the connection between the double-end rotating member (2) and the backrest mounting member (1) and the headrest connecting member (3); the headrest member (4) is provided with a slide groove mechanism (41); the headrest connecting member (3) is adjustably connected to the slide groove mechanism (41) of the headrest member (4) by rotating a positioning slider (6).

2. An adjustable headrest according to claim 1, characterized in that The two ends of the rotational positioning slider (6) are hinged to the headrest connecting member (3); a limit plate (61) is provided on the rotational positioning slider (6) towards the headrest connecting member (3); and the headrest connecting member (3) is correspondingly provided with a limit groove (31) for limiting the rotation angle of the limit plate (61).

3. The adjustable headrest according to claim 1, characterized in that: The position locking mechanism (5) comprises a locking tooth (51) and a locking compression spring (52); the backrest mounting member (1) and the headrest connecting member (3) are respectively provided with a locking space 1 (11) and a locking space 2 (32) for installing the position locking mechanism (5) towards the double-end rotating member (2); and a surface of the double-end rotating member (2) is provided with a plurality of gear teeth (21) corresponding to the locking tooth (51).

4. The adjustable headrest according to claim 3, characterized in that: An anti-shake convex strip (511) is arranged on the outer side of the locking tooth (51).

5. The adjustable headrest according to claim 3, characterized in that: The surface of the locking tooth (51) is a curved surface, and the shape of the latching tooth (21) fits the locking tooth (51).

6. The adjustable headrest according to claim 1, characterized in that: The rotating positioning slide block (6) comprises a sliding bottom plate (62) and an abutment block (63); a positioning spring block (621) is arranged on the inner side of the sliding bottom plate (62), and a guide block (622) is arranged on the outer side.

7. The adjustable headrest according to claim 6, characterized in that: The slide groove mechanism (41) comprises a slide plate (411) and a stabilizing member (412); the stabilizing member (412) is arranged between the abutting blocks (63); the sliding base plate (62) is arranged between the slide plate (411) and the stabilizing member (412); a guide groove (4121) is arranged on the stabilizing member (412); and the guide block (622) is slidably connected to the guide groove (4121).

8. The adjustable headrest according to claim 7, characterized in that: The slide plate (411) is provided with a plurality of positioning recesses (413) arranged in a straight line on the inner side facing the sliding bottom plate (62), and the positioning spring block (621) is installed in coordination with the positioning recesses (413).

9. The adjustable headrest according to claim 1, characterized in that: The backrest mounting member (1) is concave at the connection with the double-end rotating member (2) to form a concave space one (12), the headrest connecting member (3) is concave at the connection with the double-end rotating member (2) to form a concave space two (35), and the double-end rotating member (2) is arranged in both the concave space one (12) and the concave space two (35).

10. The adjustable headrest according to claim 1, characterized in that: The backrest mounting member (1) comprises a clamping area (13), the clamping area (13) is C-shaped, and a mounting point (131) is provided at the bottom of the C-shaped clamping area (13).

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