Office chair with adjustable backrest

Abstract

The utility model relates to the technical field of office chairs, and discloses an office chair with an adjustable backrest, which comprises a support frame, the outer wall of the support frame is provided with a limiting hole, the inside of the support frame is slidably connected with a sliding column, the outer wall of the sliding column is fixedly connected with a chair back, the outer wall of the sliding column is fixedly connected with a connecting plate, and the connecting plate is fixedly connected with the backrest. A clamping column is slidably connected to the interior of the connecting plate, the outer wall of the clamping column is slidably connected to the interior of the supporting frame, a sliding piece is fixedly connected to the outer wall of the clamping column, the outer wall of the sliding piece is slidably connected to the interior of the connecting plate, and a limiting assembly is arranged on the outer wall of the chair back and used for limiting. According to the chair, the clamping column can be driven to slide by driving the rotating block to rotate, the effect of flexibly adjusting the position of the chair back can be achieved through mutual cooperation of the sliding column, the connecting plate, the sliding piece, the first spring and the chair back, and then the effect of meeting the requirements of different users can be achieved, so that the chair is suitable for being used by more users.

Description

Technical Field

[0001] This utility model relates to the field of office chair technology, and in particular to an office chair with an adjustable backrest. Background Technology

[0002] An office chair is a type of seating specifically designed for office environments. It aims to provide comfort and support, helping people who sit for long periods maintain good posture and reduce physical discomfort. It typically features multiple adjustment functions to accommodate different user needs and ensure physical well-being during work. While office chair designs and functions can vary considerably, they all fundamentally prioritize ergonomics to improve work efficiency and comfort. An adjustable-back office chair helps users adjust to an angle that suits their spinal curvature, reducing lower back pressure from prolonged sitting and preventing spinal deformities or pain.

[0003] An adjustable-back office chair is an office chair that can be adjusted for use in an office environment. In the past, the backrest of office chairs was usually not adjustable, which made it inconvenient to change the position of the backrest according to the needs of different users and could not accommodate a wider range of users. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides an office chair with an adjustable backrest, which aims to improve the problem that the backrest of office chairs is usually not adjustable, making it inconvenient to change the position of the backrest according to the needs of different users and unable to adapt to a wider range of users.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an adjustable backrest office chair, including a support frame, a limiting hole on the outer wall of the support frame, a sliding column slidably connected inside the support frame, a chair back fixedly connected to the outer wall of the sliding column, a connecting plate fixedly connected to the outer wall of the sliding column, a locking post slidably connected inside the connecting plate, the outer wall of the locking post slidably connected to the inside of the support frame, a sliding piece fixedly connected to the outer wall of the locking post, the outer wall of the sliding piece slidably connected to the inside of the connecting plate, one end of a spring fixedly connected to the outer wall of the sliding piece, the other end of the spring fixedly connected to the inside of the connecting plate, a rotating shaft fixedly connected to the outer wall of the locking post, a rotating block rotatably connected to the outer wall of the rotating shaft, the outer wall of the rotating block slidably connected to the outer wall of the connecting plate, and a limiting component provided on the outer wall of the chair back, the limiting component being used to limit the movement of the chair back.

[0006] Preferably, the limiting component includes a limiting block, the outer wall of which is fixedly connected to the outer wall of the chair back, a limiting strip is slidably connected inside the limiting block, and the outer wall of the limiting strip is fixedly connected to the outer wall of the support frame.

[0007] Preferably, a fixing block is fixedly connected to the outer wall of the chair back, a sliding block is fixedly connected to the outer wall of the fixing block, and a limit plate is slidably connected inside the sliding block.

[0008] Preferably, a sliding plate is slidably connected inside the sliding block, one end of a second spring is fixedly connected to the outer wall of the sliding plate, and the other end of the second spring is fixedly connected inside the sliding block.

[0009] Preferably, a locking block is fixedly connected to the outer wall of the sliding plate, and the outer wall of the locking block is slidably connected to the inside of the limiting plate.

[0010] Preferably, a connecting column is fixedly connected to the outer wall of the limiting plate, a limiting groove is formed inside the connecting column, and a connecting shaft is fixedly connected inside the connecting column.

[0011] Preferably, a connecting block is rotatably connected to the outer wall of the connecting shaft, one end of a spring three is fixedly connected to the inside of the connecting block, and a ball is fixedly connected to the other end of the spring three. The outer wall of the ball is slidably connected to the inside of the limiting groove, and the outer wall of the connecting block is fixedly connected to the outer wall of the headrest.

[0012] Preferably, a chair seat is fixedly connected to the outer wall of the support frame, and a base is provided on the outer wall of the support frame.

[0013] This utility model has the following beneficial effects:

[0014] 1. In this utility model, by driving the rotating block to rotate on the outer wall of the rotating shaft, the locking column can be driven to slide. Through the cooperation of the sliding column, connecting plate, sliding piece, spring and chair back, the position of the chair back can be flexibly adjusted, thereby adapting to the needs of different users and accommodating a wider range of users.

[0015] 2. In this utility model, by pressing the sliding plate, the locking block slides inside the limiting plate. Through the cooperation of spring 2, sliding block, limiting plate, connecting column, connecting shaft, connecting block, spring 3, ball bearing and headrest, the angle and position of the headrest can be adjusted to meet the different needs of users and improve the comfort of the user's head and neck. Attached Figure Description

[0016] Figure 1 This is a perspective view of the adjustable backrest office chair proposed in this utility model.

[0017] Figure 2 This is a partial structural diagram of the backrest of the adjustable backrest office chair proposed in this utility model.

[0018] Figure 3This is a cross-sectional schematic diagram of the internal structure of the support frame of the adjustable back office chair proposed in this utility model.

[0019] Figure 4 This is a partial structural diagram of the limiting strip of the adjustable backrest office chair proposed in this utility model;

[0020] Figure 5 This is a partial structural diagram of the limiting plate of the adjustable back office chair proposed in this utility model;

[0021] Figure 6 This is a cross-sectional schematic diagram of the internal structure of the sliding block of the adjustable backrest office chair proposed in this utility model.

[0022] Figure 7 This is a partial structural diagram of the headrest of the adjustable-back office chair proposed in this utility model.

[0023] Legend:

[0024] 1. Support frame; 2. Limiting hole; 3. Chair back; 4. Sliding column; 5. Connecting plate; 6. Locking column; 7. Sliding piece; 8. Spring 1; 9. Rotating shaft; 10. Rotating block; 11. Limiting block; 12. Limiting strip; 13. Fixing block; 14. Sliding block; 15. Sliding plate; 16. Spring 2; 17. Locking block; 18. Limiting plate; 19. Connecting column; 20. Limiting groove; 21. Connecting shaft; 22. Connecting block; 23. Spring 3; 24. Ball bearing; 25. Headrest; 26. Chair seat; 27. Base. Detailed Implementation

[0025] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] Reference Figure 1 , Figure 2 and Figure 3An embodiment of this utility model provides an adjustable backrest office chair, including a support frame 1. A limiting hole 2 is formed on the outer wall of the support frame 1. A sliding column 4 is slidably connected inside the support frame 1. A chair back 3 is fixedly connected to the outer wall of the sliding column 4. A connecting plate 5 is fixedly connected to the outer wall of the sliding column 4. A locking column 6 is slidably connected inside the connecting plate 5. The outer wall of the locking column 6 is slidably connected to the inside of the support frame 1. A sliding piece 7 is fixedly connected to the outer wall of the locking column 6. The outer wall of the sliding piece 7 is slidably connected to the inside of the connecting plate 5. One end of a spring-8 is fixedly connected to the outer wall of the sliding piece 7. The other end of the spring-8 is fixedly connected to the inside of the connecting plate 5. A rotating shaft 9 is fixedly connected to the outer wall of the locking column 6. A rotating block 10 is rotatably connected to the outer wall of the rotating shaft 9. The outer wall of the rotating block 10 is slidably connected to the outer wall of the connecting plate 5. A limiting component is provided on the outer wall of the chair back 3 to limit the movement of the chair back 3.

[0027] Specifically, the limiting hole 2 on the outer wall of the support frame 1 serves as a limiting device. The sliding column 4 sliding inside the support frame 1 moves the chair back 3. The sliding column 4 fixes the connecting plate 5. Manually rotating the rotating block 10 on the outer wall of the rotating shaft 9 moves the locking column 6 inside the support frame 1. When the locking column 6 slides out of the support frame 1, it moves the chair back 3 and the sliding column 4 inside the support frame 1. Rotating the rotating block 10 in the opposite direction moves the locking column 6 inside the limiting hole 2. The spring 8's rebound causes the sliding piece 7 to slide inside the connecting plate 5, thus limiting the position of the chair back 3 after adjustment. This allows for flexible adjustment of the chair back 3 to suit the needs of different users.

[0028] Reference Figure 4 The limiting component includes a limiting block 11, the outer wall of which is fixedly connected to the outer wall of the chair back 3, and a limiting strip 12 is slidably connected inside the limiting block 11. The outer wall of the limiting strip 12 is fixedly connected to the outer wall of the support frame 1.

[0029] Specifically, the limiting block 11 fixes the backrest 3, and by moving the backrest 3, the limiting block 11 can slide on the outer wall of the limiting strip 12, thus supporting and limiting the backrest 3.

[0030] Reference Figure 5 and Figure 6A fixing block 13 is fixedly connected to the outer wall of the chair back 3. A sliding block 14 is fixedly connected to the outer wall of the fixing block 13. A limiting plate 18 is slidably connected inside the sliding block 14. A sliding plate 15 is slidably connected inside the sliding block 14. One end of a second spring 16 is fixedly connected to the outer wall of the sliding plate 15. The other end of the second spring 16 is fixedly connected to the inside of the sliding block 14. A locking block 17 is fixedly connected to the outer wall of the sliding plate 15. The outer wall of the locking block 17 is slidably connected to the inside of the limiting plate 18.

[0031] Specifically, the backrest 3 fixes the fixing block 13, and the fixing block 13 fixes the sliding block 14. The limiting plate 18 can be adjusted by sliding inside the sliding block 14, thereby adjusting the headrest 25. By pressing the sliding plate 15, the locking block 17 can be slid inside the sliding block 14. The spring 16 can rebound and drive the locking block 17 to slide inside the limiting plate 18, thus limiting the movement of the limiting plate 18.

[0032] Reference Figure 7 A connecting post 19 is fixedly connected to the outer wall of the limiting plate 18. A limiting groove 20 is opened inside the connecting post 19. A connecting shaft 21 is fixedly connected inside the connecting post 19. A connecting block 22 is rotatably connected to the outer wall of the connecting shaft 21. One end of a spring 23 is fixedly connected inside the connecting block 22. A ball 24 is fixedly connected to the other end of the spring 23. The outer wall of the ball 24 is slidably connected inside the limiting groove 20. The outer wall of the connecting block 22 is fixedly connected to the outer wall of the head support 25.

[0033] Specifically, the limiting plate 18 fixes the connecting column 19, and the connecting column 19 has a limiting groove 20 inside, which serves as a limiting groove. The connecting column 19 fixes the connecting shaft 21. By driving the connecting block 22 to rotate on the outer wall of the connecting shaft 21, the head support 25 can be rotated. The spring 23 rebounds the ball 24, which can slide inside the limiting groove 20, thereby achieving the effect of limiting the angle of the head support 25.

[0034] Reference Figure 1 A chair seat 26 is fixedly connected to the outer wall of the support frame 1, and a base 27 is provided on the outer wall of the support frame 1.

[0035] Specifically, the support frame 1 fixes the seat 26, which supports the user. The base 27 on the outer wall of the support frame 1 supports the office chair, and the bottom of the base 27 is equipped with wheels to move the office chair.

[0036] Working Principle: When using this office chair, it can be adjusted according to the user's needs. First, by manually lifting the rotating block 10, the rotating shaft 9 rotates inside the rotating block 10, which in turn causes the sliding plate 7 to slide inside the connecting plate 5. At the same time, the spring 8 is compressed, and the rotating shaft 9 causes the locking pin 6 to slide out of the limiting hole 2 inside the support frame 1. At this time, by manually pulling the backrest 3, the sliding pin 4 slides inside the support frame 1, and the limiting block 11 slides on the outer wall of the limiting strip 12. When it slides to the appropriate position, by rotating the rotating block 10 again, and through the rebound effect of the spring 8, the locking pin 6 can slide inside the limiting hole 2, achieving the function of limiting the movement of the backrest 3, thereby achieving the effect of adjusting the position of the backrest 3. This allows the position of the backrest 3 to be adjusted according to the needs of different users, accommodating a wider range of users. In addition, when it is necessary to adjust the headrest 25, by pressing the sliding plate 15 and sliding it inside the sliding block 14, the spring 16 is compressed. The locking block 17 slides out of the slot inside the limiting plate 18. At this time, the limiting plate 18 slides inside the sliding block 14, adjusting the limiting plate 18 to a suitable position. When the sliding block 14 is stopped, the locking block 17 can slide inside the limiting plate 18 due to the rebound of the second spring 16. This achieves the effect of limiting the limiting plate 18 after adjustment. When the angle of the headrest 25 needs to be adjusted, the connecting block 22 rotates on the outer wall of the connecting shaft 21 by rotating the headrest 25. The spring 23 rebounds the ball 24, allowing the ball 24 to slide inside the limiting groove 20. The limiting groove 20 limits the ball 24, thereby achieving the effect of flexibly adjusting the position of the headrest 25 to adapt to the user's sitting posture in different situations and improve the user's head comfort. This office chair can not only flexibly adjust the backrest 3 according to the user's needs to adapt to more users, but also adjust the headrest 25 to improve the user's neck and head comfort.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An office chair with an adjustable backrest, comprising a support frame (1), characterized in that: The outer wall of the support frame (1) is provided with a limiting hole (2), the inner part of the support frame (1) is slidably connected with a slide column (4), the outer wall of the slide column (4) is fixedly connected with a chair back (3), the outer wall of the slide column (4) is fixedly connected with a connecting plate (5), the inner part of the connecting plate (5) is slidably connected with a clamping column (6), the outer wall of the clamping column (6) is slidably connected in the inner part of the support frame (1), the outer wall of the clamping column (6) is fixedly connected with a sliding piece (7), the outer wall of the sliding piece (7) is slidably connected in the inner part of the connecting plate (5), one end of the sliding piece (7) is fixedly connected with a spring (8), the other end of the spring (8) is fixedly connected in the inner part of the connecting plate (5), the outer wall of the clamping column (6) is fixedly connected with a rotating shaft (9), the outer wall of the rotating shaft (9) is rotatably connected with a rotating block (10), the outer wall of the rotating block (10) is slidably connected with the outer wall of the connecting plate (5), the outer wall of the chair back (3) is provided with a limiting assembly, and the limiting assembly is used for limiting the chair back (3).

2. An adjustable back office chair according to claim 1, characterized in that: The limiting assembly comprises a limiting block (11), and the outer wall of the limiting block (11) is fixedly connected with the outer wall of the chair back (3).

3. An adjustable back office chair according to claim 1, characterized in that: The outer wall of the chair back (3) is fixedly connected with a fixed block (13), the outer wall of the fixed block (13) is fixedly connected with a sliding block (14), and the inner part of the sliding block (14) is slidably connected with a limiting plate (18).

4. An adjustable back office chair according to claim 3, characterized in that: The inner part of the sliding block (14) is slidably connected with a sliding plate (15), one end of the sliding plate (15) is fixedly connected with a spring (16), and the other end of the spring (16) is fixedly connected in the inner part of the sliding block (14).

5. An adjustable back office chair according to claim 4, characterized in that: The outer wall of the sliding plate (15) is fixedly connected with a clamping block (17), and the outer wall of the clamping block (17) is slidably connected in the inner part of the limiting plate (18).

6. An adjustable back office chair according to claim 5, characterized in that: The outer wall of the limiting plate (18) is fixedly connected with a connecting column (19), the inner part of the connecting column (19) is provided with a limiting groove (20), and the inner part of the connecting column (19) is fixedly connected with a connecting shaft (21).

7. An adjustable back office chair according to claim 6, characterized in that: The outer wall of the connecting shaft (21) is rotatably connected with a connecting block (22), one end of the connecting block (22) is fixedly connected with a spring (23), the other end of the spring (23) is fixedly connected with a rolling ball (24), the outer wall of the rolling ball (24) is slidably connected in the inner part of the limiting groove (20), and the outer wall of the connecting block (22) is fixedly connected with the outer wall of a head support (25).

8. The adjustable-back office chair of claim 1, wherein: The outer wall of the support frame (1) is fixedly connected with a chair seat (26), and the outer wall of the support frame (1) is provided with a base (27).

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