Adjustable waist rest supporting office chair
By introducing a mechanical structure to adjust the motor and storage motor drive into the office chair, dynamic adjustment of the backrest height and angle is achieved, solving the problem of easy tilt and poor comfort in traditional office chairs after the backrest is adjusted, and improving the stability and comfort of the seat.
Patent Information
- Application Number
- CN202420185098.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-25
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-01-25
AI Technical Summary
The stress point of traditional office seats changes after the backrest is adjusted, which is easy to tilt, and the backrest cannot be adjusted to meet different needs, which affects comfort.
An adjustable lumbar support office chair is designed. By adjusting the corresponding mechanical structure of the motor and storage motor drive, dynamic adjustment of the backrest height and angle is achieved to ensure that the seat remains stable and comfortable under different usage conditions.
It effectively solves the problem of tilting caused by changes in stress after seat back adjustment, and improves the comfort and flexibility of the seat by adjusting the backrest height and angle.
Smart Images
Figure CN222584036U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of office chairs, in particular to an office chair with adjustable lumbar support. Background Art
[0002] An office chair is a chair with a backrest used when people sit and work on their desks. People will feel back pain when working on their desks for a long time. With the expansion of cities and the development of transportation, people's workplaces are getting farther and farther away from their homes. In modern society, people basically spend their lunch break in the office, so an office chair that can take into account both office comfort and rest has become a necessity for desk workers.
[0003] After the backrest of a traditional chair is adjusted, the stress point changes, and it is easy to tilt when subjected to external force. In addition, the change of the backrest height during work and rest will also affect the comfort. However, the traditional backrest usually cannot change its length to make timely adjustments. Utility Model Content
[0004] 1. Technical issues to be resolved
[0005] In view of the deficiencies of the prior art, the utility model provides an office chair with adjustable lumbar support, which solves the problems raised in the background technology.
[0006] (II) Technical solution
[0007] To achieve the above purpose, the utility model is implemented through the following technical solutions: an adjustable lumbar support office chair, including a seat frame, the upper end of the seat frame is rotatably connected to an armrest frame, the upper end of the armrest frame is rotatably connected to a backrest frame, the upper end of the backrest frame is fixedly connected to a traction shell, the back of the lower end of the backrest frame is fixedly connected to a storage shell, the inner side of the storage shell is fixedly connected to a storage motor, the output end of the storage motor is fixedly connected to a storage rod, the surface of the storage rod is fixedly connected to a folding sheet through a traction line, the inner side of the storage shell is rotatably connected to a limit rod, the limit rod is in contact with the folding sheet, the folding sheet is slidably connected to the backrest frame, and the upper end of the folding sheet is fixedly connected to There is a tension ring, which is fixedly connected to the traction shell, a positioning plate is fixedly connected to the lower surface of the seat frame, a moving frame is slidably connected to the inner side of the lower end of the positioning plate, and a rack plate is fixedly connected to the upper end of the moving frame. A positioning frame is fixedly connected to the lower surface of the seat frame, an adjustment motor is fixedly connected to the lower end of the inner side of the positioning frame, an adjustment rod is fixedly connected to the output end of the adjustment motor, the rack plate is meshed with the adjusting rod, the upper end of the adjusting rod is rotatably connected to the seat frame, the upper end of the adjusting rod is meshed with a linkage rod, the end of the linkage rod away from the adjusting rod is meshed with a lower shaft, both ends of the lower shaft are meshed with angle shafts, the angle shaft is rotatably connected to the seat frame, and the angle shaft is fixedly connected to the backrest frame.
[0008] Preferably, the folding sheet is composed of an array of long strip-shaped sheets, the folding sheets are connected by traction lines, and the folding sheets can be wrapped around the surface of the storage rod.
[0009] Preferably, the outer layer of the tension ring is a circular ring, the inner side of the outer circular ring of the tension ring is fixedly connected with a coil spring, and the center of the coil spring is fixedly connected to the traction shell.
[0010] Preferably, the moving frame is composed of a moving plate and moving wheels, the rack plate is fixedly connected to one side of the upper surface of the moving plate, the moving plate is slidably connected to the positioning plate, and both ends of the lower surface of the moving plate are rotatably connected to the moving wheels.
[0011] Preferably, the adjustment rod is composed of a spur gear and a first bevel gear, the spur gear is meshed with the rack plate, the upper end of the spur gear is fixedly connected with the first bevel gear, and the first bevel gear is meshed with the linkage rod.
[0012] Preferably, the linkage rod is composed of a second bevel gear and a worm, a worm wheel is fixedly connected to the surface of the lower shaft, the worm wheel is meshed with the worm wheel, the second bevel gear is meshed with the first bevel gear, and gears are provided at both ends of the lower shaft and meshed with the angle shaft.
[0013] (III) Beneficial effects
[0014] The utility model provides an office chair with adjustable lumbar support, which has the following beneficial effects:
[0015] 1. The adjustable lumbar support seat starts the adjustment motor to drive the adjustment rod to rotate, so that the adjustment rod drives the linkage rod to rotate. The adjustment rod rotates and drives the rack plate to move, and the movable frame is pushed out. The linkage rod rotates to rotate the lower shaft, so that the angle shaft drives the backrest frame to rotate and adjust the angle with the seat frame. At the same time, the movable frame extends from the bottom to place the seat for tilting, which solves the problem that the seat back is easily tilted after the force changes after adjustment due to external force.
[0016] 2. The adjustable lumbar support seat starts the storage motor to rotate the storage rod and wrap around the folding piece, so that the folding piece is wrapped around the surface of the storage rod after passing the limit rod. The folding piece moves downward to pull the upper traction rope to adjust the height of the folding piece, thereby achieving the effect of adjusting the height of the backrest to increase its comfort, and solving the problem that the seat back cannot be adjusted and has poor comfort. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0018] Figure 2 This is a schematic diagram of the storage rod structure of the utility model;
[0019] Figure 3 This is a schematic diagram of the structure of the mobile frame of the utility model;
[0020] Figure 4 This is a schematic diagram of the structure of the adjusting rod of the utility model.
[0021] Among them, the seat frame-1, the armrest frame-2, the backrest frame-3, the traction shell-4, the storage shell-5, the storage motor-6, the storage rod-7, the folding sheet-8, the limit rod-9, the tension ring-10, the positioning plate-11, the moving frame-12, the moving plate-121, the moving wheel-122, the rack plate-13, the positioning frame-14, the adjustment rod-15, the spur gear-151, the first bevel gear-152, the linkage rod-16, the second bevel gear-161, the worm-162, the lower shaft-17, the worm wheel-171, the angle shaft-18, and the adjustment motor-19. DETAILED DESCRIPTION
[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0023] The utility model provides an office chair with adjustable lumbar support, such as Figure 1-4 As shown, it includes a seat frame 1, the upper end of the seat frame 1 is rotatably connected to an armrest frame 2, the upper end of the armrest frame 2 is rotatably connected to a backrest frame 3, the upper end of the backrest frame 3 is fixedly connected to a traction shell 4, the back of the lower end of the backrest frame 3 is fixedly connected to a storage shell 5, the inner side of the storage shell 5 is fixedly connected to a storage motor 6, the output end of the storage motor 6 is fixedly connected to a storage rod 7, the surface of the storage rod 7 is fixedly connected to a folding sheet 8 through a traction line, the folding sheet 8 is composed of an array of long sheet plates, the folding sheets 8 are connected by traction lines, the folding sheets 8 can be wrapped around the surface of the storage rod 7, and the folding sheet 8 can be rolled up on the surface of the storage rod 7 to change the height to meet different needs.
[0024] The traction line above the folding piece 8 is elastic, and the inner side of the storage shell 5 is rotatably connected to the limit rod 9, the limit rod 9 contacts the folding piece 8, the folding piece 8 is slidably connected to the backrest frame 3, and the upper end of the folding piece 8 is fixedly connected with a tension ring 10 through the traction line, and the tension ring 10 is fixedly connected to the traction shell 4. The outer layer of the tension ring 10 is a circular ring, and the inner side of the outer circular ring of the tension ring 10 is fixedly connected with a coil spring, and the center of the coil spring is fixedly connected to the traction shell 4. The traction line above the folding piece 8 is wrapped around the outer surface of the tension ring 10, so that the folding piece 8 can be reset in time after being pulled.
[0025] A locking plate 11 is fixedly connected to the lower surface of the seat frame 1, and a moving frame 12 is slidably connected to the inner side of the lower end of the locking plate 11. A rack plate 13 is fixedly connected to the upper end of the moving frame 12. The moving frame 12 consists of a moving plate 121 and moving wheels 122. The rack plate 13 is fixedly connected to one side of the upper surface of the moving plate 121. The moving plate 121 is slidably connected to the locking plate 11, and moving wheels 122 are rotatably connected to both ends of the lower surface of the moving plate 121. The moving frame 12 can be movably supported under the seat frame 1 to prevent the seat from tilting.
[0026] A positioning frame 14 is fixedly connected to the lower surface of the seat frame 1, and an adjustment motor 19 is fixedly connected to the lower inner end of the positioning frame 14. An adjusting rod 15 is fixedly connected to the output end of the adjusting motor 19. The rack plate 13 is meshed with the adjusting rod 15. The upper end of the adjusting rod 15 is rotatably connected to the seat frame 1. A linkage rod 16 is meshed at the upper end of the adjusting rod 15. The adjusting rod 15 is composed of a spur gear 151 and a first bevel gear 152. The spur gear 151 is meshed with the rack plate 13. The upper end of the spur gear 151 is fixedly connected with the first bevel gear 152. The first bevel gear 152 is meshed with the linkage rod 16. The adjusting rod 15 can rotate to drive the rack plate 13 to move while driving the linkage rod 16 to rotate.
[0027] The end of the linkage rod 16 away from the adjustment rod 15 is meshed with a lower shaft 17, and the two ends of the lower shaft 17 are meshed with an angle shaft 18. The linkage rod 16 is composed of a second bevel gear 161 and a worm 162. A worm wheel 171 is fixedly connected to the surface of the lower shaft 17. The worm 162 is meshed with the worm wheel 171, and the second bevel gear 161 is meshed with the first bevel gear 152. Gears are provided at both ends of the lower shaft 17 and are meshed with the angle shaft 18. The linkage rod 16 can rotate and rub the lower shaft 17 to rotate, so that the angle shaft 18 drives the backrest frame 3 to rotate and adjust the angle. The angle shaft 18 is rotatably connected to the seat frame 1, and the angle shaft 18 is fixedly connected to the backrest frame 3.
[0028] Working principle: When in use, first start the storage motor 6 according to the usage habits of the seat, so that the storage rod 7 rotates and wraps around the folding piece 8, so that the folding piece 8 passes through the limit rod 9 and is wrapped around the surface of the storage rod 7, and the folding piece 8 moves downward to pull the upper traction rope to adjust the height of the folding piece 8. When the shape needs to be changed for rest, the adjustment motor 19 is started to drive the adjustment rod 15 to rotate, so that the adjustment rod 15 drives the linkage rod 16 to rotate, and the rack plate 13 is driven to move while the adjustment rod 15 rotates, and the movable frame 12 is pushed out, and the linkage rod 16 rotates to rotate the lower shaft 17, so that the corner shaft 18 drives the backrest frame 3 to rotate and adjust the angle with the seat frame 1, and at the same time the movable frame 12 is extended from the bottom to place the seat to tilt.
[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An office chair with adjustable lumbar support, comprising a seat frame (1), characterized in that: The upper end of the seat frame (1) is rotatably connected to an armrest frame (2), the upper end of the armrest frame (2) is rotatably connected to a backrest frame (3), the upper end of the backrest frame (3) is fixedly connected to a traction shell (4), the back of the lower end of the backrest frame (3) is fixedly connected to a storage shell (5), the inner side of the storage shell (5) is fixedly connected to a storage motor (6), the output end of the storage motor (6) is fixedly connected to a storage rod (7), the surface of the storage rod (7) is fixedly connected to a folding sheet (8) via a traction line, the inner side of the storage shell (5) is rotatably connected to a limit rod (9), the limit rod (9) is in contact with the folding sheet (8), the folding sheet (8) is slidably connected to the backrest frame (3), the upper end of the folding sheet (8) is fixedly connected to a tension ring (10) via a traction line, and the tension ring (10) is fixedly connected to the traction shell (4); The lower surface of the seat frame (1) is fixedly connected with a positioning plate (11), the inner side of the lower end of the positioning plate (11) is slidably connected with a moving frame (12), the upper end of the moving frame (12) is fixedly connected with a rack plate (13), the lower surface of the seat frame (1) is fixedly connected with a positioning frame (14), the inner lower end of the positioning frame (14) is fixedly connected with an adjustment motor (19), the output end of the adjustment motor (19) is fixedly connected with an adjustment rod (15), the rack plate (13) is meshed with the adjustment rod (15), the upper end of the adjustment rod (15) is rotatably connected with the seat frame (1), the upper end of the adjustment rod (15) is meshed with a linkage rod (16), the end of the linkage rod (16) away from the adjustment rod (15) is meshed with a lower shaft (17), both ends of the lower shaft (17) are meshed with a rotation angle shaft (18), the rotation angle shaft (18) is rotatably connected with the seat frame (1), and the rotation angle shaft (18) is fixedly connected with the backrest frame (3).
2. The adjustable lumbar support office chair according to claim 1, characterized in that: The folding sheet (8) is composed of an array of long strip-shaped sheets, the folding sheets (8) are connected by traction lines, and the folding sheets (8) can be wound around the surface of the storage rod (7).
3. The adjustable lumbar support office chair according to claim 1, characterized in that: The outer layer of the tension ring (10) is a circular ring, and a coil spring is fixedly connected to the inner side of the outer circular ring of the tension ring (10), and the center of the coil spring is fixedly connected to the traction shell (4).
4. The adjustable lumbar support office chair according to claim 1, characterized in that: The movable frame (12) is composed of a movable plate (121) and movable wheels (122); the rack plate (13) is fixedly connected to one side of the upper surface of the movable plate (121); the movable plate (121) is slidably connected to the positioning plate (11); and the movable wheels (122) are rotatably connected to both ends of the lower surface of the movable plate (121).
5. The adjustable lumbar support office chair according to claim 1, characterized in that: The adjustment rod (15) is composed of a spur gear (151) and a first bevel gear (152); the spur gear (151) is meshed with the rack plate (13); the upper end of the spur gear (151) is fixedly connected to the first bevel gear (152); and the first bevel gear (152) is meshed with the linkage rod (16).
6. The adjustable lumbar support office chair according to claim 1, characterized in that: The linkage rod (16) is composed of a second bevel gear (161) and a worm (162); a worm gear (171) is fixedly connected to the surface of the lower shaft (17); the worm gear (162) meshes with the worm gear (171); the second bevel gear (161) meshes with the first bevel gear (152); and gears are provided at both ends of the lower shaft (17) and mesh with the rotation angle shaft (18).