Office chair with backrest inclination convenient to adjust

Abstract

The utility model discloses an office chair with backrest inclination convenient to adjust, and relates to the technical field of office chairs, the office chair comprises a seat cushion, supporting rods are fixedly connected to the corners of the bottom end of the seat cushion, bases are fixedly mounted at the bottom ends of two adjacent supporting rods, a backrest is rotatably mounted at the rear end of the seat cushion, and a headrest is arranged above the backrest; an adjusting structure is arranged at the rear end of the backrest, the positioning rod is extruded to release the second spring, and the adjusting rod slides to adjust the height of the headrest to a proper position. The angle of the headrest is changed by pushing the connecting plate, the fixed sliding rod is reset and locked after loosening, and different user requirements are met; an inclination adjusting mechanism is arranged at the joint of the cushion and the backrest and used for adjusting the inclination of the backrest.

Description

Technical Field

[0001] The utility model relates to the technical field of office chairs, in particular to an office chair with a backrest that is convenient for adjusting the inclination. Background Art

[0002] With the continuous improvement of modern office environments, employees' requirements for the comfort and functionality of office chairs are increasing. The patent publication number CN217959385U describes an office chair backrest structure. The office chair backrest structure utilizes the rotational coordination between the backrest and the seat plate to allow the backrest angle to be adjusted at will, thereby meeting the various usage requirements of different users. At the same time, the coordination of the limit spring, the limit pin, and the limit hole can be used to fix the position of the adjusted turntable, thereby limiting and fixing the rotation angle of the backrest, so that the overall chair maintains good stability for easy use by users. Furthermore, the coordination of the coil spring and the sleeve can release the restriction on the backrest after the limit pin is pulled out, allowing the backrest to quickly return to its original position for use. However, the above-mentioned office chair backrest structure is not convenient for adjusting the position of the headrest. Due to the different heights of different people, it is impossible to ensure that the position of the office chair headrest is suitable for users of different heights, which affects people's use.

[0003] Based on this, an office chair with an easily adjustable backrest inclination is now provided to eliminate the disadvantages of existing office chairs. Utility Model Content

[0004] The purpose of the utility model is to provide an office chair with an easily adjustable backrest inclination, so as to solve the problem in the background art that the position of the office chair headrest cannot be ensured to be adapted to users of different heights.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] An office chair with an adjustable backrest inclination comprises a seat cushion, wherein the bottom corners of the seat cushion are fixedly connected to support rods, the bottom ends of two adjacent support rods are fixedly mounted with bases, the rear end of the seat cushion is rotatably mounted with a backrest, and a headrest is provided above the backrest;

[0007] It also includes an adjustment structure, which is arranged at the rear end of the backrest and is used to adjust the height and angular position of the headrest;

[0008] The inclination adjustment mechanism is arranged at the connection between the seat cushion and the backrest, and is used to adjust the inclination of the backrest.

[0009] On the basis of the above technical solutions, the present invention also provides the following optional technical solutions:

[0010] In an optional scheme: the adjustment structure includes a connecting tube, which is fixedly installed on the top of the rear end of the backrest, and an adjusting rod is slidably installed inside the connecting tube, and spring grooves are symmetrically opened on both sides of the adjusting rod, and a second spring is installed inside the spring groove, one end of the second spring is fixedly connected to a limit block, and the other end of the limit block is fixedly connected to a positioning rod, and a number of positioning holes are symmetrically opened on both sides of the connecting tube, and the top of the adjusting rod is fixedly connected to the fixing block, and cross bars are symmetrically fixed on both sides of the fixing block, and a mounting plate is rotatably installed on the cross bar, and the mounting plate is fixedly installed on the rear end of the headrest, and a positioning plate is fixedly installed on one end of the mounting plate on the left side close to the cross bar, and the positioning plate is rotatably connected to the cross bar, and an angle adjustment component is provided at the connection between the positioning plate and the cross bar.

[0011] In an optional solution: the angle adjustment assembly includes a fixed cross bar, a third spring, a sliding connecting plate, a fixed slide bar, and a positioning slide hole. The fixed cross bar is fixedly installed on the left end of the fixed block, and the fixed cross bar is located behind the cross bar. The fixed cross bar and the cross bar are both slidably connected to the sliding connecting plate. The third spring is sleeved on the outside of the fixed cross bar, and one end of the third spring is fixedly connected to the sliding connecting plate. Several positioning slide holes are circumferentially opened on one end of the positioning plate close to the cross bar, and several fixed slide bars matching the positioning slide holes are fixedly installed on one end of the sliding connecting plate close to the positioning plate.

[0012] In an optional solution: the inclination adjustment mechanism includes a fixed rod and a positioning tooth, the fixed rod is fixedly installed on the left end of the seat cushion, the positioning tooth is fixedly installed on the left end of the backrest, the outer wall of the fixed rod is slidably connected to the connecting plate, one end of the connecting plate is fixedly connected to the first spring, the other end of the first spring is fixedly connected to the limiting plate, the fixed rod is fixedly connected to the limiting plate, the end of the connecting plate close to the positioning tooth is fixedly connected to the disc, and the end of the disc close to the positioning tooth is fixedly installed with a number of positioning blocks that match the tooth gap of the positioning gear.

[0013] In an optional solution: a plurality of ventilation holes are provided at the rear end of the backrest.

[0014] In an optional solution, armrests are fixedly connected to the middle positions on both sides of the backrest.

[0015] In an optional solution: the seat cushion is designed with a honeycomb mesh and silicone material.

[0016] In an optional solution: an anti-slip layer is provided at the bottom end of the base.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. This utility model uses an adjustment structure to squeeze the positioning rod to release the second spring, and then slide the adjustment rod to adjust the headrest height to the appropriate position. Push the connecting plate to change the headrest angle, and release the fixed slide rod to reset and lock it, meeting different user needs.

[0019] 2. The utility model has carefully designed multiple ventilation holes at the rear end of the backrest. These ventilation holes significantly improve the ventilation performance of the backrest, allowing air to circulate freely, effectively reducing the stuffiness of the backrest and providing users with a more comfortable sitting experience. In addition, the seat cushion adopts a unique design of honeycomb mesh and silicone material. The honeycomb mesh structure not only ensures excellent breathability, but also effectively reduces heat accumulation caused by sitting for a long time, keeping the buttocks dry. The integration of silicone material not only provides additional support, but also ensures the softness and durability of the seat cushion, making it more fit the curve of the human body and reducing the fatigue caused by sitting for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the present utility model.

[0021] Figure 2 It is a structural diagram of the side position of the utility model.

[0022] Figure 3 This is a structural diagram of the rear end position of the utility model.

[0023] Figure 4 It is a structural diagram of the inclination adjustment mechanism of the utility model.

[0024] Figure 5 It is a structural diagram of the regulating structure of the utility model.

[0025] Figure 6 For this utility model Figure 5 Schematic diagram of the structure at point A in the middle.

[0026] Figure 7 This is a structural diagram of the angle adjustment component of the utility model.

[0027] Figure 8 For this utility model Figure 7 Schematic diagram of the structure at point B.

[0028] Notes on the accompanying drawings: 11. Seat cushion; 12. Support rod; 13. Base; 14. Backrest; 15. Vent; 16. Positioning tooth; 17. Positioning block; 18. Disc; 19. Connecting plate; 20. Fixing rod; 21. Limiting plate; 22. First spring; 23. Armrest; 24. Connecting tube; 25. Positioning hole; 26. Adjusting rod; 27. Spring slot; 28. Positioning rod; 29. ​​Limiting block; 30. Second spring; 31. Fixing block; 32. Cross bar; 33. Fixed cross bar; 34. Third spring; 35. Sliding connecting plate; 36. Fixed slide bar; 37. Positioning disc; 38. Positioning slide hole; 39. Headrest. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0030] In one embodiment, Figures 1-8 As shown, an office chair with an adjustable backrest inclination includes a seat cushion 11, a support rod 12 fixedly connected to the bottom corner of the seat cushion 11, a base 13 fixedly mounted at the bottom ends of two adjacent support rods 12, a backrest 14 rotatably mounted on the rear end of the seat cushion 11, and a headrest 39 provided above the backrest 14;

[0031] It also includes an adjustment structure, which is arranged at the rear end of the backrest 14 and is used to adjust the height and angular position of the headrest 39;

[0032] The inclination adjustment mechanism is provided at the connection between the seat cushion 11 and the backrest 14 and is used to adjust the inclination of the backrest 14 .

[0033] In this embodiment, the user uses the adjustment structure to adjust the height and angle position of the headrest 39 according to his or her height; the user adjusts the inclination angle of the backrest 14 through the inclination adjustment mechanism, thereby improving the comfort of the office chair.

[0034] In one embodiment, Figure 3 、 Figure 5 and Figure 6As shown, the adjustment structure includes a connecting tube 24, which is fixedly mounted on the top rear end of the backrest 14, and an adjusting rod 26 is slidably mounted inside the connecting tube 24. Spring grooves 27 are symmetrically provided on both sides of the adjusting rod 26, and a second spring 30 is installed inside the spring groove 27. One end of the second spring 30 is fixedly connected to a limit block 29, and the other end of the limit block 29 is fixedly connected to a positioning rod 28. A number of positioning holes 25 are symmetrically provided on both sides of the connecting tube 24, and the top of the adjusting rod 26 is fixedly connected to a fixing block 31. Cross bars 32 are symmetrically fixed on both sides of the fixing block 31, and a mounting plate is rotatably mounted on the cross bar 32. The mounting plate is fixedly mounted on the rear end of the headrest 39, and a positioning plate 37 is fixedly installed on one end of the mounting plate on the left side close to the cross bar 32. The positioning plate 37 is rotatably connected to the cross bar 32, and an angle adjustment component is provided at the connection between the positioning plate 37 and the cross bar 32.

[0035] By squeezing the positioning rod 28, the second spring 30 is compressed, and the positioning rod 28 moves to the inside of the connecting tube 24, so that the adjusting rod 26 can slide inside the connecting tube 24, thereby driving the headrest 39 to slide. The headrest 39 can be moved to a specified position according to people of different heights. The positioning rod 28 can be moved by the rebound effect of the second spring 30, and the positioning rod 28 can be moved to the inside of the positioning hole 25 to limit the adjusting rod 26, the fixing block 31 and the headrest 39.

[0036] In one embodiment, Figure 7 and Figure 8 As shown, the angle adjustment assembly includes a fixed cross bar 33, a third spring 34, a sliding connecting plate 35, a fixed slide bar 36, and a positioning slide hole 38. The fixed cross bar 33 is fixedly installed at the left end of the fixed block 31, and the fixed cross bar 33 is located behind the cross bar 32. The fixed cross bar 33 and the cross bar 32 are both slidably connected to the sliding connecting plate 35. The outside of the fixed cross bar 33 is sleeved with a third spring 34, and one end of the third spring 34 is fixedly connected to the sliding connecting plate 35. Several of the positioning slide holes 38 are circumferentially opened at one end of the positioning plate 37 close to the cross bar 32, and the end of the sliding connecting plate 35 close to the positioning plate 37 is fixedly installed with several fixed slide bars 36 matching the positioning slide holes 38.

[0037] By pushing the sliding connecting plate 35, the third spring 34 is compressed, and the fixed slide rod 36 is disengaged from the positioning slide hole 38, and then the angle of the headrest 39 can be adjusted. After the adjustment is completed, the sliding connecting plate 35 is released, and under the elastic force of the third spring 34, the fixed slide rod 36 is reset into the positioning slide hole 38, thereby limiting the positioning plate 37 and the headrest 39, making it easy to adjust and use according to the different usage needs of different people.

[0038] In one embodiment, Figure 2 and Figure 4As shown, the inclination adjustment mechanism includes a fixed rod 20 and a positioning tooth 16. The fixed rod 20 is fixedly installed on the left end of the seat cushion 11, and the positioning tooth 16 is fixedly installed on the left end of the backrest 14. The outer wall of the fixed rod 20 is slidably connected to the connecting plate 19, one end of the connecting plate 19 is fixedly connected to the first spring 22, and the other end of the first spring 22 is fixedly connected to the limiting plate 21. The fixed rod 20 is fixedly connected to the limiting plate 21, and the end of the connecting plate 19 close to the positioning tooth 16 is fixedly connected to the disc 18. The end of the disc 18 close to the positioning tooth 16 is fixedly installed with a number of positioning blocks 17 that match the tooth gap of the positioning tooth 16.

[0039] By pulling the connecting plate 19, the connecting plate 19 slides on the outer wall of the fixing rod 20, the positioning block 17 moves away from the positioning tooth 16, and the first spring 22 is compressed. Then the user can adjust the inclination angle of the backrest 14. After the adjustment is completed, the connecting plate 19 is released, and the first spring 22 rebounds, thereby resetting the positioning block 17. The positioning block 17 enters the gap between the positioning teeth 16, and then limits and fixes the positioning teeth 16 and the backrest 14, so that the user can adjust the inclination angle of the backrest 14 according to his own needs.

[0040] In one embodiment, Figure 1 and 2 As shown, a plurality of ventilation holes 15 are provided at the rear end of the backrest 14 .

[0041] The design of the vents 15 can significantly improve the ventilation performance of the backrest 14, allowing air to circulate freely, thereby reducing the stuffiness of the backrest and providing a more comfortable experience for the user.

[0042] In one embodiment, Figure 2 and Figure 3 As shown, armrests 23 are fixedly connected to the middle positions on both sides of the backrest 14.

[0043] The armrest 23 provides an additional support point for the user, especially when standing up or sitting down, which can increase stability and reduce the risk of falling due to loss of balance. The armrest 23 can serve as a support point for the arm to reduce arm fatigue when sitting for a long time.

[0044] In one embodiment, Figure 1 、 Figure 2 and Figure 3 As shown, the seat cushion 11 is designed with a honeycomb mesh and silicone material.

[0045] When the seat cushion 11 is designed with a honeycomb mesh and silicone material, it not only has excellent breathability, but also combines the softness and durability of silicone. The honeycomb mesh structure allows air to circulate freely, effectively reducing heat accumulation caused by prolonged sitting, keeping the buttocks dry and comfortable. The silicone material provides additional support and comfort, allowing the seat cushion 11 to better fit the body's curves and reduce fatigue caused by long periods of sitting.

[0046] In one embodiment, Figure 1 As shown, the bottom end of the base 13 is provided with an anti-slip layer.

[0047] Providing an anti-skid layer at the bottom of the base 13 is beneficial to increasing the friction coefficient of the bottom of the base 13, thereby increasing the friction between the bottom of the base 13 and the ground, ensuring the safety and stability of the office chair.

[0048] The above embodiment discloses an office chair that is easy to adjust the backrest inclination, wherein the user squeezes the positioning rod 28 according to his or her own height, the second spring 30 is compressed, and the positioning rod 28 moves into the interior of the connecting tube 24, so that the adjustment rod 26 can slide inside the connecting tube 24, thereby driving the headrest 39 to slide, and moving the headrest 39 to a specified position. By pushing the sliding connecting plate 35, the third spring 34 is compressed, and the fixed slide rod 36 is disengaged from the positioning slide hole 38, and then the angle of the headrest 39 can be adjusted. After the adjustment is completed, the sliding connecting plate 35 is released, and the fixed slide rod 36 is fixed under the elastic force of the third spring 34. 36 resets and enters the positioning slide hole 38, thereby limiting the positioning plate 37 and the headrest 39. By pulling the connecting plate 19, the connecting plate 19 slides on the outer wall of the fixing rod 20, and the positioning block 17 moves away from the positioning tooth 16. The first spring 22 is compressed, and then the user can adjust the inclination angle of the backrest 14. After the adjustment is completed, the connecting plate 19 is released, and the first spring 22 is used to rebound, so that the positioning block 17 is reset and enters the gap between the gear teeth of the positioning tooth 16, thereby limiting and fixing the positioning tooth 16 and the backrest 14, so that the user can adjust the inclination angle of the backrest 14 according to his own needs.

[0049] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. An office chair with an adjustable backrest inclination, comprising a seat cushion (11), wherein the bottom corner of the seat cushion (11) is fixedly connected to a support rod (12), the bottom ends of two adjacent support rods (12) are fixedly mounted with a base (13), the rear end of the seat cushion (11) is rotatably mounted with a backrest (14), and a headrest (39) is provided above the backrest (14); It is characterized by: It also includes an adjustment structure, which is arranged at the rear end of the backrest (14) and is used to adjust the height and angular position of the headrest (39); An inclination adjustment mechanism, the inclination adjustment mechanism being arranged at the connection between the seat cushion (11) and the backrest (14) and being used for adjusting the inclination of the backrest (14); The adjustment structure includes a connecting tube (24), the connecting tube (24) is fixedly installed on the top of the rear end of the backrest (14), an adjusting rod (26) is slidably installed inside the connecting tube (24), spring grooves (27) are symmetrically opened on both sides of the adjusting rod (26), a second spring (30) is installed inside the spring groove (27), one end of the second spring (30) is fixedly connected to a limit block (29), and the other end of the limit block (29) is fixedly connected to a positioning rod (28), and the connecting tube (24) is symmetrical on both sides. A plurality of positioning holes (25) are provided, the top end of the adjusting rod (26) is fixedly connected to a fixing block (31), cross bars (32) are symmetrically fixed on both sides of the fixing block (31), a mounting plate is rotatably mounted on the cross bar (32), and the mounting plate is fixedly mounted on the rear end of the headrest (39), a positioning plate (37) is fixedly mounted on one end of the left mounting plate close to the cross bar (32), the positioning plate (37) is rotatably connected to the cross bar (32), and an angle adjustment component is provided at the connection between the positioning plate (37) and the cross bar (32).

2. The office chair with easy backrest adjustment according to claim 1, characterized in that: The angle adjustment assembly comprises a fixed cross bar (33), a third spring (34), a sliding connecting plate (35), a fixed slide bar (36), and a positioning slide hole (38). The fixed cross bar (33) is fixedly installed on the left end of the fixed block (31). The fixed cross bar (33) is located behind the cross bar (32). The fixed cross bar (33) and the cross bar (32) are both slidably connected to the sliding connecting plate (35). The fixed cross bar (33) is provided with a third spring (34) on the outside. One end of the third spring (34) is fixedly connected to the sliding connecting plate (35). Several positioning slide holes (38) are circumferentially opened on one end of the positioning plate (37) close to the cross bar (32). The sliding connecting plate (35) is fixedly installed with several fixed slide bars (36) matching the positioning slide holes (38) on one end close to the positioning plate (37).

3. The office chair with easy backrest adjustment according to claim 1, characterized in that: The inclination adjustment mechanism comprises a fixing rod (20) and a positioning tooth (16). The fixing rod (20) is fixedly mounted on the left end of the seat cushion (11), and the positioning tooth (16) is fixedly mounted on the left end of the backrest (14). The outer wall of the fixing rod (20) is slidably connected to a connecting plate (19). One end of the connecting plate (19) is fixedly connected to a first spring (22), and the other end of the first spring (22) is fixedly connected to a limiting plate (21). The fixing rod (20) is fixedly connected to the limiting plate (21). One end of the connecting plate (19) close to the positioning tooth (16) is fixedly connected to a disc (18). One end of the disc (18) close to the positioning tooth (16) is fixedly mounted with a plurality of positioning blocks (17) that match the tooth gap of the positioning tooth (16).

4. The office chair with easily adjustable backrest inclination according to claim 1, characterized in that: A plurality of ventilation holes (15) are provided at the rear end of the backrest (14).

5. The office chair with easily adjustable backrest inclination according to claim 1, characterized in that: The middle positions on both sides of the backrest (14) are fixedly connected to armrests (23).

6. The office chair with easily adjustable backrest inclination according to claim 1, characterized in that: The seat cushion (11) is designed with a honeycomb mesh and silica gel material.

7. The office chair with easily adjustable backrest inclination according to claim 1, characterized in that: The bottom end of the base (13) is provided with an anti-slip layer.

Images