Angle adjusting mechanism of chair headrest

Abstract

The utility model relates to the technical field of chair headrests, in particular to an angle adjusting mechanism of a chair headrest, which comprises a supporting piece, a connecting piece and a connecting piece, the connecting piece is used for being connected with a chair back, an adjusting piece is further arranged on the connecting piece, and a first adjusting mechanism is arranged between the adjusting piece and the supporting piece; the first adjusting mechanism comprises two lug parts formed on the adjusting piece and a protruding part formed on the end face of the connecting piece, and the protruding part is located between the two lug parts and rotates in a matched mode through a shaft piece. Position adjustment is carried out through the first adjusting mechanism and / or the second adjusting mechanism according to different headrests, various angle adjusting requirements can be met, the overall adjusting structure is simple, assembly and maintenance are convenient, and the production efficiency of enterprises is optimized.

Description

Technical Field

[0001] The utility model relates to the technical field of chair headrests, in particular to an angle adjustment mechanism for a chair headrest. Background Art

[0002] The headrest is a crucial component of modern seat design, significantly impacting user comfort and well-being. However, most existing headrests are fixed, making them inadequate for adapting to the varying postures of different users. Because they cannot rotate or adjust, users cannot adjust their headrest position to suit their height or preferences, preventing them from ensuring optimal support and comfort during extended periods of seat use. This limitation not only reduces seat comfort but can also negatively impact the user's health over time.

[0003] Although some seats feature adjustable headrests to accommodate different users' height and angle requirements, these adjustment mechanisms are often overly complex, hindering assembly efficiency and making quick and easy adjustments difficult in practice. Therefore, existing adjustable headrest designs still have room for improvement. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art that the adjustment mechanism is often too complicated, and to propose an angle adjustment mechanism for a chair headrest.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] Design an angle adjustment mechanism for a chair headrest, including:

[0007] A support member for connecting the pillow body;

[0008] and a connecting member for connecting the chair back, wherein the connecting member is further provided with an adjusting member, and a first adjusting mechanism is provided between the adjusting member and the supporting member;

[0009] The first adjustment mechanism includes two ears formed on the adjustment member and a protrusion formed on the end face of the connecting member. The protrusion is located between the two ears and rotates through the shaft. A friction structure is also provided on the inner side of the ears.

[0010] Furthermore, an axial hole is provided on the side of the protrusion close to the ear, the ear is a hollow structure, and the shaft is arranged between the friction structure and the axial hole.

[0011] Furthermore, the friction structure includes a chuck mounted in the ear, a friction ring is abutted on one side of the chuck, and a cover plate is provided on the open side of the ear;

[0012] Wherein, an elastic member is provided between the abutment ring and the chuck.

[0013] Furthermore, annular grooves are provided on the end surfaces of the abutment ring and the chuck, and the two ends of the elastic member are respectively placed in the two annular grooves.

[0014] Furthermore, a plurality of first teeth are distributed circumferentially on the end surface of the chuck close to the protruding portion, and a plurality of second teeth are distributed circumferentially on the end surface of the protruding portion connected to the chuck.

[0015] Furthermore, a plurality of positioning protrusions are provided on the outer peripheral surface of the chuck, and a limiting groove adapted to the positioning protrusions is provided on the inner side of the ear.

[0016] Furthermore, a limiting arc groove is provided on the outer peripheral surface of the protrusion, and a stop block located in the limiting arc groove is provided on the end surface of the adjusting member.

[0017] Furthermore, a sliding seat is slidably connected to the bottom of the adjusting member, and a second adjusting mechanism is provided between the sliding seat and the connecting member.

[0018] Furthermore, the second adjustment mechanism has the same structure as the first adjustment mechanism.

[0019] The utility model proposes an angle adjustment mechanism for a chair headrest, which has the beneficial effects of: the utility model can adjust the position of different headrests through the first adjustment mechanism and / or the second adjustment mechanism, which can meet various angle adjustment requirements; secondly, the overall adjustment structure is simple, easy to assemble and maintain, and optimizes the production efficiency of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of the first embodiment of the present utility model;

[0021] Figure 2 This is a schematic diagram of the explosion structure of Example 2 of the present utility model;

[0022] Figure 3 This is a cross-sectional view of the second embodiment of the present utility model;

[0023] Figure 4 This is a schematic structural diagram of the second embodiment of the present utility model;

[0024] Figure 5 This is a structural diagram of embodiment 3 of the present utility model.

[0025] In the figure: 1. pillow body; 2. support member; 3. connecting member; 4. adjusting member; 5. first adjusting mechanism; 51. ear; 52. protrusion; 53. shaft member; 54. limiting arc groove; 55. stop block; 6. friction structure; 61. chuck; 62. interference ring; 63. cover plate; 64. elastic member; 65. first tooth; 66. second tooth; 67. positioning protrusion; 68. limiting groove; 7. sliding seat; 8. second adjusting mechanism. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] Example 1

[0028] Reference Figure 1-3 This is an embodiment of the present invention, which discloses an angle adjustment mechanism for a chair headrest, the adjustment mechanism is used to achieve angle adjustment of the headrest, specifically in this embodiment, a single angle adjustment method is used as an example, and in this embodiment, the embodiment includes a support member 2 for connecting to a pillow body 1, and specifically in this embodiment, the support member 2 of the pillow body 1 is a fixed connection method;

[0029] and a connecting member 3 for connecting the chair back, an adjusting member 4 is further provided on the connecting member 3, and a first adjusting mechanism 5 is provided between the adjusting member 4 and the supporting member 2;

[0030] The first adjustment mechanism 5 includes two ears 51 formed on the adjustment member 4 and a protrusion 52 formed on the end face of the connecting member 3. The protrusion 52 is located between the two ears 51 and rotates through the shaft 53. A friction structure 6 is also provided on the inner side of the ear 51.

[0031] In some embodiments, an axial hole is provided on the side of the raised portion 52 close to the ear portion 51 in the utility model, the ear portion 51 is a hollow structure, and the shaft member 53 is arranged between the friction structure 6 and the axial hole. Specifically, there are two axial holes stacked in this embodiment, that is, there are two shaft members 53, which are respectively inserted into the two friction structures 6 on both sides to realize the rotational connection between the ear portion 51 and the raised portion 52.

[0032] In some embodiments, the friction structure 6 of the present invention includes a chuck 61 installed in the ear 51, and a friction ring 62 is abutted on one side of the chuck 61. A cover plate 63 is provided on the open side of the ear 51. Specifically, in this embodiment, the cover plate 63 can be connected to the open side of the ear 51 by means of a clamping connection, a threaded connection, or a gluing connection. At the same time, the inner side of the cover plate 63 stops the shaft 53 to prevent the shaft 53 from moving.

[0033] An elastic member 64 is provided between the abutment ring 62 and the chuck 61 . Preferably, the elastic member 64 in this embodiment is a spring.

[0034] In addition, in order to achieve positioning of both ends of the spring, in this embodiment, annular grooves are provided on the end surfaces of the abutment ring 62 adjacent to the chuck 61 , and both ends of the elastic member 64 are respectively placed in the two annular grooves.

[0035] On the basis of the above embodiment, a plurality of first teeth 65 are circumferentially distributed on the end surface of the chuck 61 close to the protrusion 52 , and a plurality of second teeth 66 are circumferentially distributed on the end surface of the protrusion 52 connected thereto.

[0036] That is to say, in this embodiment, a spring is provided to push the contact chuck 61 to move, and the chuck 61 is in contact with the protrusion 52 to achieve positioning, and the protrusion 52 is positioned by the mutual cross-engagement of the first teeth 65 and the second teeth 66. When the angle of the pillow body 1 needs to be adjusted, it can be bent upward or downward. With the help of the expansion and contraction ability of the spring, the first teeth 65 and the second teeth 66 are continuously engaged until the support member 2 cooperates with the pillow body 1 to be adjusted to a predetermined angle.

[0037] In addition, in order to achieve angle adjustment and limitation of the support member 2, a limiting arc groove 54 is provided on the outer peripheral surface of the protrusion 52 in this embodiment, and a stop block 55 located in the limiting arc groove 54 is provided on the end face of the adjustment member 4.

[0038] Furthermore, in order to ensure the circumferential stability of the chuck 61 when installed inside the ear 51, in this embodiment, a plurality of positioning protrusions 67 are provided on the outer peripheral surface of the chuck 61, and a limiting groove 68 adapted to the positioning protrusion 67 is provided on the inner side of the ear 51. That is to say, in this embodiment, the circumferential rotation angle of the chuck 61 is positioned by adopting the matching mode of the limiting groove 68 and the positioning protrusion 67 to ensure the stability of the angle adjustment of the headrest 1.

[0039] Example 2

[0040] Reference Figure 2-4The similarities between this embodiment and the first embodiment are not repeated here. The difference is that in this embodiment, a sliding seat 7 is also slidably connected to the bottom of the adjusting member 4, and a second adjusting mechanism 8 is provided between the sliding seat 7 and the connecting member 3. The sliding positioning method of the sliding seat 7 can be fixed by bolts. Of course, the positioning can also be achieved by using the positioning groove and the positioning glass bead in the existing technology. This method is an existing technology and will not be described here.

[0041] Furthermore, the second adjusting mechanism 8 has the same structure as the first adjusting mechanism 5 .

[0042] That is to say, in this embodiment, the angle of the adjusting member 4 can also be positioned. The purpose of this design is not only to be able to adjust the inclination angle of the pillow body 1, but also to adjust the angle of the entire adjusting member 4 by adjusting the sliding seat 7 and the second adjusting mechanism 8 of the connecting member 3. In this way, the upper and lower positions of the pillow body 1 can be changed to meet the diverse needs of adjustment.

[0043] Example 3

[0044] Reference Figure 5 In this embodiment, the similarities with the second embodiment are not repeated here. The difference is that: in this embodiment, a fixing plate 21 is fixedly mounted on the front side of the support member 2, and a channel is formed between the fixing plate 21 and the end surface of the support member 2;

[0045] Among them, the middle part of the pillow body 1 has a guide rod 11, and the guide rod 11 is arranged in the channel. The end face of the guide rod is provided with a plurality of positioning grooves, and the inner side of the fixing plate 21 is fixed with positioning glass beads. Through the cooperation between the positioning glass beads and the positioning grooves, damping cooperation is achieved, thereby realizing the height-adjustable function requirement of the pillow body 1.

[0046] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An angle adjustment mechanism for a chair headrest, characterized in that: include: A support member (2) for connecting the pillow body (1); and a connecting member (3) for connecting the chair back, an adjusting member (4) being further provided on the connecting member (3), and a first adjusting mechanism (5) being provided between the adjusting member (4) and the supporting member (2); The first adjustment mechanism (5) comprises two ears (51) formed on the adjustment member (4) and a protrusion (52) formed on the end surface of the connecting member (3); the protrusion (52) is located between the two ears (51) and rotates in conjunction with the shaft (53); and a friction structure (6) is also provided on the inner side of the ears (51).

2. The angle adjustment mechanism for a chair headrest according to claim 1, characterized in that: An axial hole is provided on the side of the protrusion (52) close to the ear (51); the ear (51) is a hollow structure; and the shaft (53) is arranged between the friction structure (6) and the axial hole.

3. The angle adjustment mechanism for a chair headrest according to claim 1 or 2, characterized in that: The friction structure (6) comprises a chuck (61) installed in the ear (51), a contact ring (62) is abutted on one side of the chuck (61), and a cover plate (63) is provided on the opening side of the ear (51); Wherein, an elastic member (64) is provided between the abutment ring (62) and the chuck (61).

4. The angle adjustment mechanism for a chair headrest according to claim 3, characterized in that: Annular grooves are provided on the end surfaces of the abutment ring (62) and the chuck (61), and the two ends of the elastic member (64) are respectively placed in the two annular grooves.

5. The angle adjustment mechanism for a chair headrest according to claim 3, characterized in that: A plurality of first teeth (65) are circumferentially distributed on the end surface of the chuck (61) close to the raised portion (52), and a plurality of second teeth (66) are circumferentially distributed on the end surface of the raised portion (52) connected thereto.

6. The angle adjustment mechanism for a chair headrest according to claim 3, characterized in that: A plurality of positioning protrusions (67) are provided on the outer peripheral surface of the chuck (61), and a limiting groove (68) adapted to the positioning protrusions (67) is provided on the inner side of the ear portion (51).

7. The angle adjustment mechanism for a chair headrest according to claim 1, characterized in that: A limiting arc groove (54) is provided on the outer peripheral surface of the protruding portion (52), and a stop block (55) located in the limiting arc groove (54) is provided on the end surface of the adjusting member (4).

8. The angle adjustment mechanism for a chair headrest according to claim 1, characterized in that: A sliding seat (7) is also slidably connected to the bottom of the adjusting member (4), and a second adjusting mechanism (8) is provided between the sliding seat (7) and the connecting member (3).

9. The angle adjustment mechanism for a chair headrest according to claim 8, characterized in that: The second adjustment mechanism (8) has the same structure as the first adjustment mechanism (5).

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