Office chair lumbar support adjustment structure

Abstract

The utility model relates to office chair technical field discloses office chair waist part support adjusting structure, including office chair body, the inside fixedly connected with adjusting box of office chair body, the inside both sides of adjusting box are fixedly connected with vertical pole, the outside lower side fixedly connected with fixed hollow board of vertical pole, the inside front side rotationally connected with round bar of fixed hollow board, the outside fixedly connected with the runner of one side that round bar is far from fixed hollow board, the outside fixedly connected with adjusting short pole no.

Description

Technical Field

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

[0002] Office chairs are designed for long hours of office work, primarily to provide a comfortable sitting posture, support the body's normal posture, reduce physical fatigue, and promote health. Modern office chair design emphasizes ergonomic principles, aiming to provide comfort and support during extended periods of sitting. Modern office chairs typically include lumbar support to alleviate fatigue for office workers.

[0003] Office chairs need to have a lumbar support structure to help improve posture, reduce discomfort from prolonged sitting, and prevent lumbar spine problems. Modern office chairs typically include lumbar pillows, which ensure that users' lower backs receive proper support during long hours of work, thereby reducing discomfort, preventing illness, and promoting healthier posture.

[0004] In existing technologies, the lumbar support pillows on some office chairs are usually of a fixed style. The height of the lower back varies when people of different heights sit down. Some fixed lumbar support pillows cannot be height adjusted, which is not very practical. Therefore, an adjustable lumbar support structure for office chairs is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides an adjustable lumbar support structure for office chairs, aiming to improve the problem that some fixed lumbar pillows in the prior art cannot be height adjusted and have poor practicality.

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

[0007] An adjustable lumbar support structure for an office chair includes an office chair body. An adjustment box is fixedly connected inside the office chair body. Vertical rods are fixedly connected to both sides of the adjustment box. A fixed hollow plate is fixedly connected to the lower outer side of each vertical rod. A round rod is rotatably connected to the front inner side of the fixed hollow plate. A wheel is fixedly connected to the outer side of the round rod, away from the fixed hollow plate. The outer side of the round rod is rotatably connected to the inside of the adjustment box. An adjusting short rod one is fixedly connected to the outer side of the round rod, near the fixed hollow plate. A connecting rod is rotatably connected to the outer side of the adjusting short rod one. A gear one is rotatably connected to the lower inner side of the connecting rod. A sliding hollow plate is slidably connected to the upper outer side of the vertical rod. An adjusting short rod two is rotatably connected to the front inner side of the sliding hollow plate. The bottom outer side of the adjusting short rod two is rotatably connected to the upper outer side of the connecting rod. A gear two is rotatably connected to the upper inner side of the connecting rod. The gear two and gear one are meshed together. A locking assembly is fixedly connected to the outer side of the round rod.

[0008] As a further description of the above technical solution:

[0009] The locking assembly includes a ratchet, the inner center of which is fixedly connected to the outside of the round rod. A fixing rod is fixedly connected to the outside of the fixing hollow plate, i.e., the side away from the gear. A pawl is rotatably connected to the outer wall of the fixing rod. A spring is sleeved on the outside of the fixing rod. The two ends of the spring are respectively fixedly connected to the outside of the fixing hollow plate and the outside of the pawl.

[0010] As a further description of the above technical solution:

[0011] The inside of the regulating box, on the side away from the rotating wheel, is provided with a sliding groove. The outside of the sliding hollow plate, on the side away from the second gear, is fixedly connected to a connecting block. The outside of the connecting block is slidably connected to the inside of the sliding groove. The outside of the connecting block is fixedly connected to a lumbar pillow. The outside of the lumbar pillow, on the side close to the sliding hollow plate, is slidably connected to the outside of the regulating box.

[0012] As a further description of the above technical solution:

[0013] The adjustment box is fixedly connected to the outside of a handrail, and a control panel is fixedly connected to the top of the handrail;

[0014] As a further description of the above technical solution:

[0015] A signal transmission line is fixedly connected to the outer side of the control panel, and a fixing block is fixedly connected to the top of the handrail.

[0016] As a further description of the above technical solution:

[0017] The signal transmission line is externally slidably connected to the inner side of the fixed block, and a motor is fixedly connected to the outer side of the lumbar pillow;

[0018] As a further description of the above technical solution:

[0019] The other end of the signal transmission line is fixedly connected to the outside of the motor, and a rotating shaft is fixedly connected to the drive end of the motor.

[0020] As a further description of the above technical solution:

[0021] An elliptical wheel is fixedly connected to the outside of the rotating shaft, and the elliptical wheel is slidably connected to the inner wall of the lumbar pillow.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the rotating wheel can drive the adjusting short rod one through the round rod. The adjusting short rod one drives the connecting rod to move through the meshing of gear one and gear two. The connecting rod drives the sliding hollow plate to move through the adjusting short rod two. The sliding hollow plate can drive the lumbar pillow to move up and down through the connecting block, so as to achieve the effect of adjusting the height of the lumbar pillow of the office chair, which is suitable for different people and improves the practicality of the office chair.

[0024] 2. In this utility model, the motor can be started by the control panel on the armrest. The motor can drive the elliptical wheel to rotate inside the lumbar pillow through the rotating shaft. During the rotation, the elliptical wheel can squeeze and push the lumbar pillow, thereby changing the shape of the lumbar pillow so that it fits the waist of the person and improves the comfort of the office chair. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of the adjustable lumbar support structure for the office chair proposed in this utility model.

[0026] Figure 2 This is a schematic diagram of the adjustment box of the lumbar support adjustment structure for the office chair proposed in this utility model.

[0027] Figure 3 This is a schematic diagram of the fixed hollow plate of the adjustable lumbar support structure for the office chair proposed in this utility model.

[0028] Figure 4 This is a schematic diagram of the gear one of the lumbar support adjustment structure of the office chair proposed in this utility model;

[0029] Figure 5 for Figure 3 Enlarged view of point A in the middle;

[0030] Figure 6This is a schematic diagram of the elliptical wheel structure of the lumbar support adjustment structure of the office chair proposed in this utility model.

[0031] Legend:

[0032] 1. Office chair body; 2. Adjustment box; 3. Vertical rod; 4. Fixed hollow plate; 5. Round rod; 6. Rotary wheel; 7. Adjustment rod one; 8. Connecting rod; 9. Gear one; 10. Sliding hollow plate; 11. Adjustment rod two; 12. Gear two; 13. Slide groove; 14. Connecting block; 15. Lumbar pillow; 16. Ratchet; 17. Fixed rod; 18. Spring; 19. Pawl; 20. Armrest; 21. Control board; 22. Signal transmission line; 23. Motor; 24. Rotating shaft; 25. Elliptical wheel; 26. Fixed block. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Reference Figure 1 , Figure 2 and Figure 4 This utility model provides an embodiment of an office chair lumbar support adjustment structure, including an office chair body 1, which is the carrier of the entire lumbar support adjustment structure. An adjustment box 2 is fixedly connected inside the office chair body 1. The adjustment box 2 is the core component housing space of the entire lumbar support adjustment structure. Vertical rods 3 are fixedly connected to both sides inside the adjustment box 2. The vertical rods 3 play an important supporting and guiding role. A fixed hollow plate 4 is fixedly connected to the lower part of the outside of the vertical rod 3 to provide stable support and installation base for the round rod 5. The round rod 5 is rotatably connected to the front side inside the fixed hollow plate 4. The round rod 5 can rotate flexibly inside the fixed hollow plate 4. A rotating wheel 6 is fixedly connected to the outside of the round rod 5, i.e., the side away from the fixed hollow plate 4. The user can drive the round rod 5 to rotate by rotating the rotating wheel 6. The outside of the round rod 5 is rotatably connected to the inside of the adjustment box 2.

[0035] An adjusting short rod 7 is fixedly connected to the outside of the round rod 5, near the fixed hollow plate 4. The adjusting short rod 7 serves to connect and transmit power. A connecting rod 8 is rotatably connected to the outside of the adjusting short rod 7. The connecting rod 8 is a key component that connects and transmits power, ensuring that gear 12 and gear 9 are always meshed. Gear 9 is rotatably connected to the lower part of the connecting rod 8. Gear 9 has precise tooth profile and dimensions to ensure good meshing and transmission efficiency with gear 12. A sliding hollow plate 10 is slidably connected to the upper part of the vertical rod 3. The sliding hollow plate 10 can vertically... The rod 3 slides stably. The inner front side of the sliding hollow plate 10 is rotatably connected to the adjusting short rod 11. The adjusting short rod 11 serves to connect and transmit power. The outer bottom side of the adjusting short rod 11 is rotatably connected to the upper outer side of the connecting rod 8. The inner upper side of the connecting rod 8 is rotatably connected to the gear 12. When the gear 9 rotates, it drives the gear 12 to rotate through meshing, thereby pushing the adjusting short rod 11 and the sliding hollow plate 10 connected to it to move, so as to achieve precise adjustment of the waist support position. The gear 12 and the gear 9 are meshed with each other. The outer side of the round rod 5 is fixedly connected to a locking component.

[0036] The inside of the adjustment box 2, on the side away from the rotating wheel 6, is provided with a slide groove 13. The slide groove 13 provides guidance and restriction for the sliding of the connecting block 14. The outside of the sliding hollow plate 10, on the side away from the gear 12, is fixedly connected to the connecting block 14. The sliding of the connecting block 14 in the slide groove 13 allows the lumbar pillow 15 to move up and down with the movement of the sliding hollow plate 10. The outside of the connecting block 14 is slidably connected to the inside of the slide groove 13. The outside of the connecting block 14 is fixedly connected to the lumbar pillow 15. The lumbar pillow 15 is a component that directly contacts the user's waist and provides lumbar support for the user. The lumbar pillow 15 is made of rubber and has a cavity inside. The outside of the lumbar pillow 15, on the side close to the sliding hollow plate 10, is slidably connected to the outside of the adjustment box 2.

[0037] Reference Figure 3 and Figure 5 The locking assembly includes a ratchet 16 with a special tooth structure that can engage with a pawl 19 to achieve a one-way locking function. The inner center of the ratchet 16 is fixedly connected to the outside of the round rod 5. A fixing rod 17 is fixedly connected to the outside of the fixed hollow plate 4, i.e., the side away from the gear 9. The fixing rod 17 provides a support point for the rotation of the pawl 19. The pawl 19 is rotatably connected to the outer wall of the fixing rod 17. The pawl 19 has a shape and structure that matches the teeth of the ratchet 16. Under the action of the spring 18, the pawl 19 can automatically engage with the teeth of the ratchet 16. The fixing rod 17 is sleeved with a spring 18, which provides a spring force to the pawl 19 that always points towards the ratchet 16. The two ends of the spring 18 are fixedly connected to the outside of the fixed hollow plate 4 and the outside of the pawl 19, respectively.

[0038] Reference Figure 1 and Figure 6 The adjustment box 2 is externally fixedly connected to a handrail 20, which provides arm support for the user. A control panel 21 is fixedly connected to the top of the handrail 20. The control panel 21 is the control interface for operating the motor 23. The control panel 21 has two buttons. A signal transmission line 22 is fixedly connected to one side of the control panel 21, serving as the signal transmission channel between the control panel 21 and the motor 23. A fixing block 26 is fixedly connected to the top of the handrail 20, which can fix the signal transmission line 22 in a suitable position while allowing the signal transmission line 22 to slide. The external sliding connection of the signal transmission line 22 is... A motor 23 is fixedly connected to the inner side of the fixing block 26 and the outer side of the lumbar pillow 15. The motor 23 is a component that provides power for adjusting the lumbar pillow 15. The other end of the signal transmission line 22 is fixedly connected to the outside of the motor 23. A rotating shaft 24 is fixedly connected to the drive end of the motor 23. The rotating shaft 24 can rotate stably under the drive of the motor 23, transmitting the rotational motion of the drive end of the motor 23 to the elliptical wheel 25. An elliptical wheel 25 is fixedly connected to the outside of the rotating shaft 24. Under the drive of the rotating shaft 24, the lumbar pillow 15 can be squeezed to change the shape of the lumbar pillow 15. The outside of the elliptical wheel 25 is slidably connected to the inner wall of the lumbar pillow 15.

[0039] Working principle: Rotating wheel 6 drives adjusting rod 7 to rotate via round rod 5. Adjusting rod 7 drives connecting rod 8 via rotating shaft. Connecting rod 8 drives adjusting rod 11 via rotating shaft. Gear 9 and gear 12 mesh to assist adjusting rod 11 in moving. Adjusting rod 11 can stably drive sliding hollow plate 10 to move on vertical rod 3. Sliding hollow plate 10 drives lumbar pillow 15 to move via connecting block 14. Connecting block 14 can slide in slide groove 13. Lumbar pillow 15 can slide on the surface of adjusting box 2. Fixed rod 17 is fixed on fixed hollow plate 4. Spring 18 provides pawl 19 with a spring force that always points towards ratchet 16, so that pawl 19 can mesh with ratchet 16, thereby locking the rotation of round rod 5 and locking the position of lumbar pillow 15, so that lumbar pillow 15 will not change position due to gravity.

[0040] By using the buttons on the armrest 20, the control board 21 can transmit signals to the motor 23 via the signal transmission line 22. The motor 23 starts, and the drive end of the motor 23 can drive the elliptical wheel 25 to rotate via the rotating shaft 24. The rotation of the elliptical wheel 25 can compress the lumbar pillow 15. The lumbar pillow 15 is made of rubber, so the elliptical wheel 25 can make the lumbar pillow 15 fit closely to the waist, improving the comfort of the office chair.

[0041] 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 adjustable lumbar support structure for an office chair, comprising the office chair body (1), characterized in that: An adjustment box (2) is fixedly connected inside the office chair body (1). Vertical rods (3) are fixedly connected to both sides of the inside of the adjustment box (2). A fixed hollow plate (4) is fixedly connected to the lower part of the outside of the vertical rods (3). A round rod (5) is rotatably connected to the front side of the inside of the fixed hollow plate (4). A wheel (6) is fixedly connected to the outside of the round rod (5), i.e., the side away from the fixed hollow plate (4). The outside of the round rod (5) is rotatably connected to the inside of the adjustment box (2). An adjustment rod (7) is fixedly connected to the outside of the round rod (5), i.e., the side closer to the fixed hollow plate (4). A connecting rod (8) is rotatably connected to the outside of the short rod (7). A gear (9) is rotatably connected to the lower part of the connecting rod (8). A sliding hollow plate (10) is slidably connected to the upper part of the vertical rod (3). An adjusting short rod (11) is rotatably connected to the front side of the sliding hollow plate (10). The bottom side of the adjusting short rod (11) is rotatably connected to the upper part of the connecting rod (8). A gear (12) is rotatably connected to the upper part of the connecting rod (8). The gear (12) and the gear (9) are meshed with each other. A locking assembly is fixedly connected to the outside of the round rod (5).

2. The lumbar support adjustment structure for office chairs according to claim 1, characterized in that: The locking assembly includes a ratchet (16), the inner center of which is fixedly connected to the outside of the round rod (5). A fixing rod (17) is fixedly connected to the outside of the fixed hollow plate (4), i.e., the side away from the gear (9). A pawl (19) is rotatably connected to the outer wall of the fixing rod (17). A spring (18) is sleeved on the outside of the fixing rod (17). The two ends of the spring (18) are fixedly connected to the outside of the fixed hollow plate (4) and the outside of the pawl (19), respectively.

3. The lumbar support adjustment structure for office chairs according to claim 1, characterized in that: The inside of the regulating box (2), on the side away from the rotating wheel (6), is provided with a sliding groove (13). The outside of the sliding hollow plate (10), on the side away from the gear (12), is fixedly connected to a connecting block (14). The outside of the connecting block (14) is slidably connected to the inside of the sliding groove (13). The outside of the connecting block (14) is fixedly connected to a lumbar pillow (15). The outside of the lumbar pillow (15), on the side close to the sliding hollow plate (10), is slidably connected to the outside of the regulating box (2).

4. The lumbar support adjustment structure for office chairs according to claim 3, characterized in that: The adjustment box (2) is fixedly connected to the outside of a handrail (20), and a control panel (21) is fixedly connected to the top of the handrail (20).

5. The lumbar support adjustment structure for office chairs according to claim 4, characterized in that: A signal transmission line (22) is fixedly connected to the outer side of the control panel (21), and a fixing block (26) is fixedly connected to the top of the handrail (20).

6. The lumbar support adjustment structure for an office chair according to claim 5, characterized in that: The signal transmission line (22) is externally slidably connected to the inside of the fixed block (26), and a motor (23) is fixedly connected to the outer side of the lumbar pillow (15).

7. The lumbar support adjustment structure for an office chair according to claim 6, characterized in that: The other end of the signal transmission line (22) is fixedly connected to the outside of the motor (23), and the drive end of the motor (23) is fixedly connected to a rotating shaft (24).

8. The lumbar support adjustment structure for an office chair according to claim 7, characterized in that: An elliptical wheel (25) is fixedly connected to the outside of the rotating shaft (24), and the elliptical wheel (25) is slidably connected to the inner wall of the lumbar pillow (15).

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