Office chair with waist rest adjusting device

Abstract

The utility model is applicable to the technical field of office chairs, and discloses an office chair with a waist rest adjusting device, a hollow frame is internally provided with an adjusting mechanism, two sides of the interior of a fixed frame are respectively provided with a plug-in limiting mechanism, the adjusting mechanism is in transmission connection with the plug-in limiting mechanisms, and the middle end of the side edge of the hollow frame is fixedly provided with a connecting rod; the connecting rods penetrate through and are slidably inserted into the fixing frame, a fixing rod is fixedly mounted at the top end of the other side of each connecting rod, the fixing rods are slidably mounted in the backrest plate, and a waist backup plate is fixedly mounted at the top end of the other side of each fixing rod. According to the technical scheme, after a user can quickly push the hollow frame and adjust the vertical inserting positions of the limiting inserting rods, the supporting position adjustment and fixing treatment of the waist backup plate can be achieved, and the situation that the user needs to adjust the position of the waist backup plate when the user uses the waist backup plate every time due to the fact that the waist backup plate slides at will is avoided; the practicability of the waist backup plate and the whole office chair is improved.

Description

Technical Field

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

[0002] Currently, office chairs are seats with backrests and armrests. The backrests on chairs are generally upright or slanted. In order to improve the comfort of sitting, a protruding pad, namely a lumbar support, is usually set on the backrest near the sitter's waist. This pad supports the sitter's waist and reduces lumbar fatigue.

[0003] However, when using lumbar supports to improve user comfort, elastic straps are often used to connect the lumbar support to the backrest for easy adjustment. While this method is simple and convenient, it lacks stability. If the user moves away from the lumbar support, it easily slips off the backrest, requiring readjustment for subsequent use and affecting the chair's usability. Therefore, we propose an office chair with an adjustable lumbar support system. Utility Model Content

[0004] The main purpose of this utility model is to provide an office chair with a lumbar support adjustment device, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] An office chair with a lumbar support adjustment device includes a seat cushion, on both sides of the bottom of the seat cushion a support frame is fixedly installed, a backrest is vertically fixedly installed on the side of the seat cushion, a fixed frame is fixedly installed at the middle of the bottom side of the backrest, and a hollow frame is slidably installed on the outside of the fixed frame.

[0007] An adjustment mechanism is provided inside the hollow frame, and insertion limiting mechanisms are provided on both sides inside the fixed frame. The adjustment mechanism and the insertion limiting mechanism are connected in a transmission manner.

[0008] A connecting rod is fixedly installed at the middle of the side of the hollow frame. A sliding groove is vertically opened at the middle of both ends of the fixed frame side, and the connecting rod is slidably inserted into the sliding groove. A fixing rod is fixedly installed at the top of the other side of each connecting rod, and the fixing rod is slidably installed inside the back panel. A lumbar support plate is fixedly installed at the top of the other side of the fixing rod, and the lumbar support plate is slidably attached to the outer wall of the back panel.

[0009] By adopting the above technical solution, the adjustment mechanism and the insertion limiting mechanism allow the user to quickly push the hollow frame to adjust the vertical insertion position of the limiting rod, thereby achieving the adjustment and fixation of the lumbar support position. This prevents the lumbar support from sliding arbitrarily, which would require the user to adjust its position every time they use the chair, thus improving the practicality of the lumbar support and the overall office chair.

[0010] As an optional solution to the technical solution of this application, the adjustment mechanism includes a transmission plate and a push spring. The transmission plates are slidably installed on both sides inside the hollow frame. The push spring is movably sleeved inside the middle of the hollow frame, and both ends of the push spring are movably attached to the outer wall of the transmission plate. A connecting block is fixedly installed on the side of each transmission plate away from the back plate. Movable grooves are opened at both ends of the side of the hollow frame away from the back plate, and the connecting blocks are slidably installed inside the movable grooves. A push plate is fixedly installed on the top of the side of each connecting block, and the push plate is slidably installed on both sides outside the hollow frame.

[0011] By adopting the above technical solution, and by setting a push spring on the side of the transmission plate, and by combining the connection and transmission action of the push plate and the transmission plate, the operator can easily adjust the horizontal position of the limit rod, thereby facilitating the adjustment of the vertical position of the hollow frame and the waist support plate.

[0012] As an optional solution to the technical solution of this application, the insertion limiting mechanism includes a limiting rod. A transmission rod is fixedly installed on the side of each transmission plate near the back plate, and the transmission rod is slidably installed inside the side of the fixed frame and the hollow frame. A limiting rod is fixedly installed at the top of the other side of each transmission rod, and the limiting rod is slidably installed inside the fixed frame. Limiting slots are opened at both ends of the side of the fixed frame. There are several sets of limiting slots, and the top of the side of the limiting rod is slidably inserted into the limiting slot.

[0013] By adopting the above technical solution, and through the transmission connection between the limiting rod and the transmission plate, the limiting rod can be moved synchronously when the transmission plate is moved, thereby realizing the vertical position adjustment and reinforcement of the hollow frame.

[0014] As an optional solution to the technical solution of this application, the fixed frame has limit grooves at both ends on the side away from the back panel, and there are several sets of limit grooves. The transmission rod is slidably inserted into the limit groove on the side. The hollow frame has guide grooves at both ends on the side near the back panel, and the transmission rod is slidably inserted into the guide groove on the other side.

[0015] By adopting the above technical solution, through the connection of the guide slide and the limiting slide, and under the guiding and limiting action, it can be ensured that the hollow frame can only move vertically outside the fixed frame after being pushed, and will not tilt laterally, thereby ensuring the rationality of the support position adjustment of the waist support plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present application discloses an office chair with a lumbar support adjustment device. This device comprises a fixed frame and a hollow frame on the outer side of the backrest, connected by a connecting rod and a fixed rod. Pushing the hollow frame allows it to slide on the outer side of the fixed frame, causing the lumbar support to move vertically along the side of the backrest. Simultaneously, while adjusting the lumbar support position, the user can also adjust the lumbar support by pushing the push plate against the hollow frame. This, combined with the transmission action of a push plate and a transmission plate connected to the inner and outer sides of the hollow frame, allows the user to push the push plate in opposite directions. The transmission plate then moves a limiting rod horizontally within the hollow frame, allowing the limiting rod to move out of its corresponding limiting slot. The user can quickly adjust the vertical insertion position of the limiting rod by pushing the hollow frame, thus adjusting and fixing the lumbar support position. This prevents the lumbar support from sliding arbitrarily, eliminating the need for adjustment with each use and improving the practicality of the lumbar support and the overall office chair.

[0018] 2. The present application provides an office chair with a lumbar support adjustment device. By installing a push spring inside the hollow frame, when the lumbar support needs to be adjusted, the transmission plate is pushed in the opposite direction. After the hollow frame and lumbar support are vertically adjusted, the operator only needs to release the resistance force on the push plate and transmission plate. Under the reverse push of the push spring, the transmission plate returns to its original position, causing the limit rod to automatically insert into the corresponding limit slot. This quickly achieves the support and reinforcement of the backrest, improving the overall ease of use of the office chair. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of an office chair with a lumbar support adjustment device according to the present invention;

[0020] Figure 2 This is a three-dimensional structural diagram of the lumbar support board and hollow frame of an office chair with a lumbar support adjustment device according to this utility model.

[0021] Figure 3 This is a side cross-sectional view of the hollow frame structure of an office chair with a lumbar support adjustment device according to the present invention.

[0022] Figure 4 This is a top view sectional view of the fixed frame and hollow frame of an office chair with a lumbar support adjustment device according to the present invention.

[0023] Reference numerals: 1. Seat cushion; 11. Support frame; 12. Backrest; 13. Lumbar support; 2. Fixed frame; 21. Hollow frame; 22. Transmission plate; 23. Transmission rod; 24. Limiting rod; 25. Connecting block; 26. Hand push plate; 27. Guide groove; 28. Connecting rod; 29. ​​Fixed rod; 3. Push spring; 4. Limiting groove; 41. Sliding groove; 42. Limiting slot; 43. Movable groove. Detailed Implementation

[0024] like Figure 1-3 As shown, this utility model provides a technical solution: an office chair with a lumbar support adjustment device, wherein support frames 11 are fixedly installed on both sides of the bottom of the seat cushion 1, a backrest 12 is vertically fixedly installed on the side of the seat cushion 1, a fixed frame 2 is fixedly installed at the middle of the bottom side of the backrest 12, a hollow frame 21 is slidably installed on the outside of the fixed frame 2, a connecting rod 28 is fixedly installed at the middle of the side of the hollow frame 21, and the connecting rod 28 is slidably inserted into the inside of the fixed frame 2, a fixed rod 29 is fixedly installed at the top of the other side of each connecting rod 28, and the fixed rod 29 is slidably installed inside the backrest 12, and a lumbar support plate 13 is fixedly installed at the top of the other side of the fixed rod 29, and the lumbar support plate 13 is slidably attached to the outer wall of the backrest 12.

[0025] In this technical solution (through Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, an adjustment mechanism is provided inside the hollow frame 21. The adjustment mechanism includes a transmission plate 22 and a push spring 3. The transmission plate 22 is slidably installed on both sides inside the hollow frame 21. The push spring 3 is movably sleeved inside the middle of the hollow frame 21, and both ends of the push spring 3 are movably attached to the outer wall of the transmission plate 22. A connecting block 25 is fixedly installed on the side of each transmission plate 22 away from the back plate 12. Movable grooves 43 are opened at both ends of the side of the hollow frame 21 away from the back plate 12, and the connecting block 25 is slidably installed inside the movable grooves 43. A push plate 26 is fixedly installed on the top of the side of each connecting block 25, and the push plate 26 is slidably installed on both sides of the outside of the hollow frame 21.

[0026] In this technical solution (through Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the fixed frame 2 has vertical sliding grooves 41 at the middle of both ends of its side, and the connecting rod 28 is inserted through and slidably connected inside the sliding grooves 41.

[0027] In this technical solution (through Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the fixed frame 2 has limit grooves 4 at both ends on the side away from the back plate 12. There are several sets of limit grooves 4, and the transmission rod 23 is slidably inserted into the limit groove 4 on the side. The hollow frame 21 has guide grooves 27 at both ends on the side near the back plate 12, and the transmission rod 23 is slidably inserted into the guide groove 27 on the other side.

[0028] In some technical solutions (through Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown), both sides of the fixed frame 2 are provided with insertion limiting mechanisms, and the adjustment mechanism and the insertion limiting mechanism are connected in a transmission manner. The insertion limiting mechanism includes a limiting rod 24. Each transmission plate 22 is fixedly installed with a transmission rod 23 on the side near the back plate 12, and the transmission rod 23 is slidably installed inside the side of the fixed frame 2 and the hollow frame 21. The other top of each transmission rod 23 is fixedly installed with a limiting rod 24, and the limiting rod 24 is slidably installed inside the fixed frame 2. Limiting slots 42 are opened at both ends of the side of the fixed frame 2. There are several sets of limiting slots 42, and the top of the side of the limiting rod 24 is slidably inserted into the inside of the limiting slot 42.

[0029] During operation, when the lumbar support plate 13 needs to be adjusted for support, the operator sits on the surface of the seat cushion 1, with their back against the front of the backrest plate 12. With fingers against the outside of the push plates 26, the operator applies force to push the two sets of push plates 26. This allows the two sets of push plates 26 to move horizontally towards each other outside the hollow frame 21. Simultaneously, under the connecting transmission action of the transmission plate 22, the limiting rod 24 moves horizontally towards each other inside the fixed frame 2 and exits from the limiting slot 42. This continues until the transmission rod 23 moves horizontally from inside the limiting slide groove 4 to inside the sliding groove 41, pushing the hollow frame 21. Guided by the sliding groove 41, the transmission rod 23 drives the hollow frame 21 to move vertically outside the fixed frame 2. This movement, combined with the connecting transmission action of the connecting rod 28 and the fixed rod 29, further facilitates the operation. The lowering of the lowering plate 13 allows the transmission rod 23 to move vertically along the side of the multi-position limiting slide 4, adjusting the position of the lowering plate 13 until it moves to fit against the user's waist for support. Then, the push plate 26 is released, and under the reverse pushing action of the push spring 3, the transmission plate 22 moves horizontally relative to the lowering plate 21. This causes the transmission rod 23 to move horizontally from the sliding groove 41 to the corresponding position of the limiting slide 4, while simultaneously driving the limiting rod 24 to insert into the limiting slot 42. Combined with the limiting action of the limiting slot 42 on the insertion of the limiting rod 24, the vertical position of the lowering plate 13 and the lowering plate 23 can be fixed, thus enabling the lowering plate 13 to stably support the user's waist.

Claims

1. An office chair with a lumbar support adjustment device, comprising a seat cushion (1), characterized in that: The seat cushion (1) is fixedly installed with support frames (11) on both sides of the bottom. The seat cushion (1) is fixedly installed with a backrest (12) on the side. The backrest (12) is fixedly installed with a fixed frame (2) at the bottom center of the side. The fixed frame (2) is slidably installed with a hollow frame (21) on the outside. The hollow frame (21) is provided with an adjustment mechanism, and the fixed frame (2) is provided with a plug-in limiting mechanism on both sides inside, and the adjustment mechanism and the plug-in limiting mechanism are connected in a transmission manner. A connecting rod (28) is fixedly installed at the middle of the side of the hollow frame (21), and the connecting rod (28) is slidably inserted into the inside of the fixed frame (2). A fixing rod (29) is fixedly installed at the top of the other side of each connecting rod (28), and the fixing rod (29) is slidably installed inside the backrest plate (12). A waist support plate (13) is fixedly installed at the top of the other side of the fixing rod (29), and the waist support plate (13) is slidably attached to the outer wall of the backrest plate (12).

2. An office chair with a lumbar support adjustment device according to claim 1, characterized in that: The adjustment mechanism includes a transmission plate (22) and a push spring (3). The transmission plate (22) is slidably installed on both sides inside the hollow frame (21). The push spring (3) is movably sleeved inside the middle end of the hollow frame (21), and both ends of the push spring (3) are movably attached to the outer wall of the transmission plate (22).

3. An office chair with a lumbar support adjustment device according to claim 2, characterized in that: Each of the transmission plates (22) has a connecting block (25) fixedly installed on the side away from the back plate (12). The hollow frame (21) has movable grooves (43) at both ends on the side away from the back plate (12), and the connecting block (25) is slidably installed inside the movable groove (43). Each of the connecting blocks (25) has a push plate (26) fixedly installed on the top side of its side, and the push plate (26) is slidably installed on both sides of the hollow frame (21).

4. An office chair with a lumbar support adjustment device according to claim 2, characterized in that: The insertion limiting mechanism includes a limiting rod (24). A transmission rod (23) is fixedly installed on the side of each transmission plate (22) near the back plate (12). The transmission rod (23) is slidably installed inside the side of the fixed frame (2) and the hollow frame (21). A limiting rod (24) is fixedly installed on the top of the other side of each transmission rod (23). The limiting rod (24) is slidably installed inside the fixed frame (2). Limiting slots (42) are opened at both ends of the side of the fixed frame (2). There are several sets of limiting slots (42). The top of the side of the limiting rod (24) is slidably inserted into the limiting slot (42).

5. An office chair with a lumbar support adjustment device according to claim 1, characterized in that: The fixed frame (2) has vertical sliding grooves (41) at the middle of both ends of its side, and the connecting rod (28) is slidably inserted into the sliding groove (41).

6. An office chair with a lumbar support adjustment device according to claim 1, characterized in that: The fixed frame (2) has limit grooves (4) at both ends on the side away from the back plate (12), and the limit grooves (4) and the sliding grooves (41) are connected. There are several sets of limit grooves (4), and the transmission rod (23) is slidably inserted into the limit groove (4) on the side. The hollow frame (21) has guide grooves (27) at both ends on the side near the back plate (12), and the transmission rod (23) is slidably inserted into the guide groove (27) on the other side.

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