Office chair with waist supporting function

Abstract

The utility model provides a waist supporting office chair which comprises a bottom plate, a rotary adjusting rod arranged at the top end of the bottom plate, a seat cushion arranged at the top end of the adjusting rod, a supporting rod arranged on the side face of the seat cushion, armrests arranged at the top end of the supporting rod, a back cushion arranged in the middle of the supporting rod, and a fixing block arranged on the back face of the back cushion. A first baffle is arranged on the surface of the fixing block, a sliding rod is arranged in the fixing block, and a second baffle is arranged on the back face of the sliding rod. Automatic adjustment and stable attachment of the supporting net are achieved, when a user leans against the surface of the back cushion, the sliding rods slide in the sliding grooves to drive the supporting net to move backwards, meanwhile, elastic force generated by the springs enables the supporting net to be tightly attached to the waist of the user, and therefore the waist supporting effect is effectively enhanced; the problem of insufficient supporting caused by looseness of the mesh cloth is solved, the comfort and supporting performance of use are improved, and it is guaranteed that the waist can be effectively supported after long-time use.

Description

Technical Field

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

[0002] A chair is a type of seating furniture with a backrest, and sometimes armrests. It refers to a chair with a backrest used for desk work while seated. It is mainly a single chair for indoor use and is widely used in offices. To improve lumbar comfort and ensure the middle of the backrest supports the lower back as much as possible, some existing office chairs have structural modifications to the back frame, creating a forward-convex lumbar support design. The mesh fabric stretched on the back frame forms a forward-convex lumbar support. This structure is relatively simple, and the lumbar support effect can be achieved through shape modification.

[0003] In the prior art, such as the patent with publication number CN208658320U, a multifunctional office chair is disclosed, which includes a seat cushion, a backrest, a pivot I, two or more bottom support components, a lumbar airbag, and a lumbar air valve. The backrest is connected to one side of the seat cushion through the pivot I. The bottom support components are located at the bottom of the seat cushion. The lumbar airbags are all located on the front side of the backrest, and the lumbar air valve is located on the back of the backrest. The lumbar airbags and the lumbar air valve are connected. The structure is simple and easy to use. It can be used as an office chair or as a nap bed.

[0004] While the aforementioned technologies can protect the lower back, they still have some shortcomings. Specifically, after prolonged use, the mesh fabric in the middle of the back frame becomes loose due to tension issues, which reduces the elasticity of the mesh lumbar support and makes it unable to provide effective support for the lower back. Utility Model Content

[0005] The purpose of this invention is to solve the problems existing in the prior art and to propose an office chair with lumbar support.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An office chair with lumbar support includes a base plate, a rotating adjustment rod at the top of the base plate, a seat cushion at the top of the adjustment rod, a support rod on the side of the seat cushion, an armrest at the top of the support rod, a backrest cushion in the middle of the support rod, a fixing block on the back of the backrest cushion, a first baffle on the surface of the fixing block, a sliding rod inside the fixing block, a second baffle on the back of the sliding rod, a spring inside the sliding rod, a fixing plate on the surface of the sliding rod, a connecting plate in the middle of the fixing plate, a protrusion fixedly mounted on the surface of the fixing plate, a rotating rod in the middle of the protrusion, a rotating block on the surface of the rotating rod, a connecting rod on the surface of the rotating block, a side plate on the surface of the connecting rod, and a support mesh in the middle of the side plate.

[0008] Preferably, the bottom end of the base plate is evenly distributed with casters, the rotating adjustment rod is rotatably connected to the base plate through a rotating plate, the support rods are symmetrically distributed at the left and right ends of the seat cushion, and the fixing blocks are symmetrically distributed at the left and right ends of the backrest cushion.

[0009] Preferably, the slide rod rotates inside the fixed block via a slide groove, the second baffle rotates inside the fixed block via a slide groove, and the second baffle is slidably connected to the first baffle.

[0010] Preferably, the spring is installed inside the slide rod via a groove, and the end of the spring away from the slide rod is fixed to the inner wall of the fixing block, with the spring and the slide rod being slidably connected.

[0011] Preferably, the rotating rod is rotatably connected to the protrusion via a rotating groove, the rotating block is rotatably connected to the protrusion, and the connecting rods are evenly distributed on the surface of the rotating block.

[0012] Preferably, the support rod has a limiting groove on its side, the seat cushion has a threaded groove on its side, a threaded rod is provided inside the threaded groove, and a rotating block is provided on the side of the threaded rod.

[0013] Preferably, the threaded rod is rotatably connected to the seat cushion via a threaded groove, the threaded rod is rotatably connected to the support rod via a limiting groove, and the rotating block rotates inside the support rod via the limiting groove.

[0014] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0015] 1. This utility model realizes the automatic adjustment and stable fit of the support net. When the user leans against the surface of the cushion, the slide bar slides in the slide groove, driving the support net to move backward. At the same time, the elastic force generated by the spring makes the support net fit tightly against the user's waist, thereby effectively enhancing the lumbar support effect. It not only solves the problem of insufficient support caused by loose mesh, but also improves the comfort and support of use, ensuring that the waist can maintain effective support even after long-term use.

[0016] 2. This utility model achieves better disassembly and handling effect through the limiting groove, threaded groove, threaded rod and rotating block. When disassembly is required, the rotating block is rotated with the help of tools, so that the threaded rod rotates backward inside the seat cushion through the threaded groove. When the threaded rod is completely rotated out of the seat cushion through the threaded groove, it can be taken out from the inside of the support rod through the limiting groove, thus facilitating disassembly and handling. Attached Figure Description

[0017] Figure 1 A three-dimensional structural diagram of an office chair with lumbar support is provided for this utility model.

[0018] Figure 2 An exploded view of the structure of an office chair with lumbar support is provided for this utility model;

[0019] Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0020] Figure 4 An exploded view of the structure of an office chair with lumbar support, presented in this utility model, is shown from another perspective.

[0021] Figure 5 An exploded view of the structure of the lumbar support of an office chair is provided for this utility model.

[0022] Figure 6 This invention presents an exploded view of the lumbar support of an office chair from another perspective.

[0023] Legend: 1. Base plate; 2. Casters; 3. Rotating plate; 4. Rotating adjustment rod; 5. Seat cushion; 6. Support rod; 7. Armrest; 8. Backrest cushion; 9. Fixing block; 10. Slide groove; 11. First baffle; 12. Slide rod; 13. Second baffle; 14. Groove; 15. Spring; 16. Fixing plate; 17. Connecting plate; 18. Protrusion; 19. Rotating groove; 20. Rotating rod; 21. Rotating block; 22. Connecting rod; 23. Side plate; 24. Support mesh; 25. Limiting groove; 26. Threaded groove; 27. Threaded rod; 28. Rotating block. Detailed Implementation

[0024] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0026] Example 1: As Figures 1-6 As shown, this utility model provides a technical solution: an office chair with lumbar support, including a base plate 1, a rotating adjustment rod 4 at the top of the base plate 1, a seat cushion 5 at the top of the adjustment rod, a support rod 6 on the side of the seat cushion 5, an armrest 7 at the top of the support rod 6, a backrest 8 in the middle of the support rod 6, a fixing block 9 on the back of the backrest 8, a first baffle 11 on the surface of the fixing block 9, a sliding rod 12 inside the fixing block 9, a second baffle 13 on the back of the sliding rod 12, a spring 15 inside the sliding rod 12, a fixing plate 16 on the surface of the sliding rod 12, a connecting plate 17 in the middle of the fixing plate 16, a protrusion 18 fixedly installed on the surface of the fixing plate 16, a rotating rod 20 in the middle of the protrusion 18, a rotating block 21 on the surface of the rotating rod 20, and a connecting rod 22 on the surface of the rotating block 21. The surface is provided with side plates 23, and a support net 24 is provided in the middle of the side plates 23. The bottom end of the base plate 1 is evenly distributed with casters 2. The rotating adjustment rod 4 is rotatably connected to the base plate 1 through the rotating plate 3. The support rods 6 are symmetrically distributed on the left and right ends of the seat cushion 5. The fixing blocks 9 are symmetrically distributed on the left and right ends of the backrest 8. The slide rod 12 rotates inside the fixing block 9 through the slide groove 10. The second baffle 13 rotates inside the fixing block 9 through the slide groove 10. The second baffle 13 is slidably connected to the first baffle 11. The spring 15 is installed inside the slide rod 12 through the groove 14. The end of the spring 15 away from the slide rod 12 is fixed to the inner wall of the fixing block 9. The spring 15 is slidably connected to the slide rod 12. The rotating rod 20 is rotatably connected to the protrusion 18 through the rotating groove 19. The rotating block 21 is rotatably connected to the protrusion 18. The connecting rod 22 is evenly distributed on the surface of the rotating block 21.

[0027] In this embodiment, by setting a fixing block 9 and a slide bar 12 on the back of the backrest 8, and installing a spring 15 inside the slide bar 12, the backrest 8 can adaptively adjust according to the user's lumbar curve, providing better lumbar support. The design of the armrest 7 and the support net 24 also increases the comfort and support of the sitting posture. This office chair can more effectively relieve the fatigue of the waist and neck caused by long hours of office work, improve the comfort of the sitting posture, and thus help improve work efficiency and protect the user's health.

[0028] Example 2: As Figures 1-4 As shown, the support rod 6 has a limiting groove 25 on its side, the cushion 5 has a threaded groove 26 on its side, a threaded rod 27 is provided inside the threaded groove 26, and a rotating block 28 is provided on the side of the threaded rod 27. The threaded rod 27 is rotatably connected to the cushion 5 through the threaded groove 26, and the threaded rod 27 is rotatably connected to the support rod 6 through the limiting groove 25. The rotating block 28 rotates inside the support rod 6 through the limiting groove 25.

[0029] In this embodiment, precise adjustment of seat height and angle is achieved. The threaded rod 27 is rotatably connected to the seat cushion 5 through the threaded groove 26, and rotatably connected to the support rod 6 through the limiting groove 25. The rotating block 28 rotates inside the support rod 6, ensuring the stability and flexibility of adjustment. This allows users to easily adjust the seat state according to their personal needs, which not only improves the convenience of use, but also enhances the comfort and health of the sitting posture, effectively relieving fatigue caused by prolonged sitting.

[0030] The working principle of this embodiment is as follows: In use, firstly, by pushing and pulling the backrest 8, the backrest 8 moves along with the seat cushion 5 via the support rod 6. Simultaneously, the seat cushion 5 moves along with the base plate 1 via the rotating adjustment rod 4, and the movement is accomplished by the universal wheels 2. Once it reaches the desired position, the user can sit on the top of the seat cushion 5, resting against the surface of the backrest 8. At this time, the support net 24 fits against the user's waist. During use, the sliding rod 12 slides backward through the sliding groove 10 inside the fixing block 9. The spring 15 inside the groove 14, under its own elasticity, allows the support net 24 to firmly fit against the user's waist. At this time, the fixing plate 16 and the connecting plate 17 slide together with the support net 24. During use, when the user adjusts their position, the support net 24 can be moved through the side plate... 23 and connecting rod 22 drive rotating block 21 to rotate, so that rotating block 21 rotates inside protrusion 18 through rotating rod 20. At this time, rotating rod 20 rotates inside protrusion 18 through rotating groove 19 to meet the waist support effect of different body positions. During use, first baffle 11 and second baffle 13 can limit sliding rod 12 and support the user's arms through armrest 7. When it is necessary to move, use a tool to rotate rotating block 28, so that threaded rod 27 rotates outward through threaded groove 26 inside seat cushion 5. When threaded rod 27 is completely rotated out of seat cushion 5 through threaded groove 26, it can be taken out from inside support rod 6 through limiting groove 25 for moving office chair. During use, rotating plate 3 can rotate rotating adjustment rod 4 to make seat cushion 5 rotate and adjust.

[0031] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. An office chair with lumbar support comprising a bottom plate (1), characterized in that: The top end of the bottom plate (1) is provided with a rotary adjusting rod (4), the top end of the adjusting rod is provided with a seat cushion (5), the side of the seat cushion (5) is provided with a supporting rod (6), the top end of the supporting rod (6) is provided with an armrest (7), the middle of the supporting rod (6) is provided with a back cushion (8), the back of the back cushion (8) is provided with a fixed block (9), the surface of the fixed block (9) is provided with a first baffle (11), the inside of the fixed block (9) is provided with a sliding rod (12), the back of the sliding rod (12) is provided with a second baffle (13), the inside of the sliding rod (12) is provided with a spring (15), the surface of the sliding rod (12) is provided with a fixed plate (16), the middle of the fixed plate (16) is provided with a connecting plate (17), the surface of the fixed plate (16) is fixedly installed with a protruding block (18), the middle of the protruding block (18) is provided with a rotating rod (20), the surface of the rotating rod (20) is provided with a rotating block (21), the surface of the rotating block (21) is provided with a connecting rod (22), the surface of the connecting rod (22) is provided with a side plate (23), and the middle of the side plate (23) is provided with a supporting net (24).

2. An office chair with lumbar support according to claim 1, characterized in that: The bottom end of the bottom plate (1) is uniformly distributed in the universal wheel (2), the rotary adjusting rod (4) is rotatably connected between the bottom plate (1) and the rotating plate (3), and the supporting rods (6) are symmetrically distributed at the left and right ends of the seat cushion (5).

3. The lumbar support office chair of claim 1, wherein: The sliding rod (12) rotates in the inside of the fixed block (9) through the sliding groove (10), the second baffle (13) rotates in the inside of the fixed block (9) through the sliding groove (10), and the second baffle (13) and the first baffle (11) are slidably connected.

4. The lumbar support office chair of claim 1, wherein: The spring (15) is installed in the inside of the sliding rod (12) through the groove (14), one end of the spring (15) away from the sliding rod (12) is fixed to the inner wall of the fixed block (9), and the spring (15) and the sliding rod (12) are slidably connected.

5. The lumbar support office chair of claim 1, wherein: The rotating rod (20) is rotatably connected between the protruding block (18) and the rotating groove (19), the rotating block (21) is rotatably connected between the protruding block (18) and the rotating groove (19), and the connecting rods (22) are uniformly distributed on the surface of the rotating block (21).

6. An office chair with lumbar support according to any one of claims 1 to 5, characterized in that: The side of the supporting rod (6) is provided with a limiting groove (25), the side of the seat cushion (5) is provided with a threaded groove (26), the inside of the threaded groove (26) is provided with a threaded rod (27), and the side of the threaded rod (27) is provided with a rotating block (28).

7. An office chair with lumbar support according to claim 6, characterized in that: The threaded rod (27) is rotatably connected between the seat cushion (5) and the threaded groove (26), the threaded rod (27) is rotatably connected between the supporting rod (6) and the limiting groove (25), and the rotating block (28) rotates in the inside of the supporting rod (6) through the limiting groove (25).

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