An adjustable backrest swivel chair

Abstract

The utility model discloses a back frame adjustable swivel chair relates to furniture technical field, including seat body, fixedly connected with multiple groups of rotating wheels at seat body bottom, the back of seat body is provided with fixed plate, and fixedly connected with the plug -in block one and the plug -in block two between fixed plate and seat body, the utility model discloses the drive end of motor rotates through drive gear, and gear drives the rotation of meshed gear ring, and gear ring drives the rotation of two groups of rotating rod two that meshed periphery, and one end of rotating rod two drives the rotation of rotating disc through connecting shaft, when rotating disc rotates, rotating disc drives rotating rod one to rotate, and rotating rod one drives the movement of moving ring, when moving ring moves, moving ring drives the up-and-down movement of lifting rod one and lifting rod two, and the height adjustment of backrest is made to lifting rod one to go up and down, and the automatic adjustment chair back frame can provide better comfort, and the height of chair back is adjusted according to own need to adapt to different sitting posture and work demand.

Description

Technical Field

[0001] This utility model relates to the field of furniture technology, specifically to a swivel chair with an adjustable backrest. Background Technology

[0002] A swivel chair is a common office or home chair. The base of a swivel chair is usually designed with casters, allowing users to rotate freely in the seat, making it convenient for users to turn to different directions in the office or home environment. Many swivel chairs have backrests that can move back and forth, and even adjust up and down, as well as provide a certain tilt angle to adapt to the body curves and sitting posture needs of different users. Swivel chairs are made of a variety of materials, including metal, plastic, wood, and different types of fabrics or leather, to provide different looks and comfort.

[0003] Chinese Patent Publication No. CN 21711547U, entitled "A Chair Backrest Frame Lifting and Adjustment Structure," includes a lifting and adjustment component for connecting to a supporting chair frame and a sliding component for connecting to a movable chair backrest. The supporting chair frame and the movable chair backrest achieve lifting and adjustment based on the cooperation of the lifting and adjustment component and the sliding component. The movable chair backrest can be adjusted up and down along the supporting chair frame. The overall lifting and adjustment structure of the chair backrest has few parts and is easy to install. The pawl can be locked in the retracted state by the cooperation of the locking pawl and the locking position. During use, the wear on the locking pawl is small and the locking position is not easily deformed. Therefore, the two can maintain a good cooperation effect during long-term use, making the lifting and adjustment function of the movable chair backrest reliable for a long time.

[0004] The shortcomings of the above solution are: due to the large number of components and the reliance on manual adjustment, the failure of any small component may cause the entire lifting and adjusting system to fail; the cooperation between the sliding component and the pawl may generate noise; and additional stabilization measures are required during operation to ensure stability during the adjustment process. Utility Model Content

[0005] The purpose of this utility model is to provide a swivel chair with an adjustable backrest to solve the technical problems in the prior art, which are that there are many parts, the structure relies on manual adjustment, the failure of any small part may cause the entire lifting and adjustment system to fail, the cooperation between the sliding parts and the pawl may generate noise, and additional stabilization measures are required to ensure stability during the adjustment process.

[0006] The technical problem to be solved by this utility model can be achieved through the following technical solution:

[0007] A swivel chair with an adjustable backrest, comprising a seat body;

[0008] Multiple sets of rotating wheels are fixedly connected to the bottom of the seat body;

[0009] A fixing plate is provided on the back of the seat body. A first insertion block and a second insertion block are fixedly connected between the fixing plate and the seat body. Both the first insertion block and the second insertion block have insertion holes. A protective cover is fixedly connected to one side of the fixing plate. A drive motor is fixedly connected to the protective cover. A gear is rotatably connected to the drive end of the drive motor. A gear ring is meshed with the outer circumference of the gear. Two sets of rotating rods are fixedly connected to the gear ring. A connecting shaft is fixedly connected to the end of the rotating rod away from the gear ring. A rotating disk is fixedly connected to the side of the connecting shaft away from the rotating rod. A first rotating rod is fixedly connected to the rotating disk. A moving ring is provided on the side of the rotating disk away from the fixing plate. The moving ring is located on the outer circumference of the first rotating rod. A first lifting rod and a second lifting rod are connected to the moving ring. A backrest is connected to the end of the first lifting rod away from the first insertion block.

[0010] As a further embodiment of this utility model, a seat cushion is provided on the seat body.

[0011] As a further embodiment of this utility model, the seat cushion has an arc-shaped structure.

[0012] As a further embodiment of this utility model, the protective cover is a steel structure.

[0013] As a further embodiment of this invention, the moving ring has an elliptical structure.

[0014] As a further aspect of this invention, a lubricant is applied between the movable ring and the rotating rod.

[0015] As a further embodiment of this utility model: the end of the lifting rod away from the moving ring is inserted into the insertion hole on the insertion block.

[0016] As a further embodiment of this utility model: the end of the lifting rod two that is away from the moving ring is inserted into the through hole on the plug block two.

[0017] As a further embodiment of this utility model, the backrest is arranged at an angle.

[0018] As a further embodiment of this utility model: a stabilizing block is fixedly connected to one end of the lifting rod two away from the plugging block two, and a plugging plate is fixedly connected to the seat body, with the stabilizing block slidably inserted into the plugging plate.

[0019] The beneficial effects of this utility model are:

[0020] 1. This utility model uses a motor to drive a gear, which in turn drives a meshing gear ring. The gear ring then drives two sets of rotating rods on their outer periphery to rotate. One end of each rotating rod rotates a rotating disk via a connecting shaft. As the rotating disk rotates, it drives a rotating rod to rotate, which in turn drives a moving ring. As the moving ring moves, it drives lifting rods one and two to move up and down. The lifting of lifting rod one allows for backrest height adjustment. The automatic backrest adjustment provides better comfort, allowing users to adjust the backrest height according to their needs to adapt to different sitting postures and work requirements.

[0021] 2. This utility model has a simple design through the cooperation of the rotating disc and the rotating rod, which will not affect the overall aesthetics of the chair. The downward movement of the second lifting rod allows the stabilizing block to slide within the plug plate, thereby maintaining the overall stability and preventing the backrest from tilting or shaking during the lifting process, thus improving the safety during use. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the rear structure of this utility model;

[0025] Figure 3 This is a schematic diagram of the fixing plate structure in this utility model;

[0026] Figure 4 This is a schematic diagram of the back structure of the fixing plate in this utility model.

[0027] In the diagram: 1. Seat body; 2. Rotating wheel; 3. Seat cushion; 4. Connecting plate; 5. Backrest; 6. Lifting rod one; 8. Fixing plate; 9. Rotating disc; 10. Connecting block one; 11. Stabilizing block; 12. Moving ring; 13. Rotating rod one; 14. Gear; 15. Gear ring; 16. Rotating rod two; 17. Connecting shaft; 18. Lifting rod two; 19. Connecting block two; 20. Protective cover. Detailed Implementation

[0028] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0029] like Figures 1-4As shown, a swivel chair with an adjustable backrest includes a seat body 1. Multiple sets of swivel casters 2 are fixedly connected to the bottom of the seat body 1. A seat cushion 3 is laid on the seat body 1. The seat cushion 3 has an arc-shaped structure. The arc-shaped structure design of the seat cushion 3 can provide better support, help users maintain a correct sitting posture, and reduce pressure on the back and neck.

[0030] A fixing plate 8 is provided on the back of the seat body 1. A first insertion block 10 and a second insertion block 19 are fixedly connected between the fixing plate 8 and the seat body 1. Both the first insertion block 10 and the second insertion block 19 have insertion holes. A protective cover 20 is fixedly connected to one side of the fixing plate 8. The protective cover 20 is a steel structure. A drive motor is fixedly connected to the protective cover 20. A gear 14 is rotatably connected to the drive end of the drive motor. A gear ring 15 is meshed with the outer circumference of the gear 14. Two sets of rotating rods 16 are fixedly connected to the gear ring 15. A connecting shaft 17 is fixedly connected to the end of the rotating rod 16 away from the gear ring 15. A rotating disk 9 is fixedly connected to the side of the connecting shaft 17 away from the rotating rod 16. A rotating rod 13 is fixedly connected to the rotating disk 9. A movable ring 12 is provided on the side of the rotating disk 9 away from the fixing plate 8. The movable ring 12 has an elliptical structure. Lubricant is applied between the moving ring 12 and the rotating rod 13 on the outer periphery of the rotating rod 13. The moving ring 12 is connected to the lifting rod 6 and the lifting rod 18. The end of the lifting rod 6 away from the moving ring 12 is inserted into the insertion hole on the insertion block 10. The end of the lifting rod 18 away from the moving ring 12 is inserted into the through hole on the insertion block 19. The design of the lifting rod 6 and the lifting rod 18 allows the height of the backrest 5 and the stabilizing block 11 to be adjusted to meet the needs of users of different heights. The end of the lifting rod 6 away from the insertion block 10 is connected to the backrest 5, which is set at an angle. The end of the lifting rod 18 away from the insertion block 19 is fixedly connected to the stabilizing block 11. The seat body 1 is fixedly connected to the insertion plate 4. The stabilizing block 11 is slidably inserted into the insertion plate 4. The stabilizing block 11 remains stable even during chair adjustment by slidingly inserting into the insertion plate 4.

[0031] The working principle of this utility model is as follows: Multiple sets of rotating wheels 2 are fixed at the bottom of the seat body 1, allowing the chair to rotate freely on the ground. Insertion holes are provided on the first insertion block 10 and the second insertion block 19, which are connected to the fixing plate 8 to fix the position between the seat cushion 3 and the fixing plate 8. The protective cover 20 is fixed on one side of the fixing plate 8 and is connected to a drive motor. The drive end of the motor rotates through the drive gear 14, which drives the meshing gear ring 15 to rotate. The gear ring 15 drives the two sets of rotating rods 16 meshing on the outer periphery to rotate. One end of the rotating rod 16 drives the rotating disk 9 to rotate through the connecting shaft 17. When the rotating disk 9 rotates, it drives the rotating rod 13 to rotate, which in turn drives the moving ring 12 to move. When the moving ring 12 moves, it drives the lifting rod 6 and the lifting rod 18 to move up and down. The lifting rod 6 adjusts the height of the backrest 5, and the lowering of the lifting rod 18 causes the stabilizing block 11 to slide within the insertion plate 4, thereby maintaining the overall stability.

[0032] The above description details one embodiment of the present utility model, but it is merely a preferred embodiment and should not be construed as limiting the scope of the present utility model. All equivalent variations and improvements made within the scope of the present utility model application should still fall within the patent coverage of the present utility model.

Claims

1. A swivel chair with an adjustable backrest, comprising a seat body (1); characterized in that: The bottom of the seat body (1) is fixedly connected to multiple sets of rotating wheels (2); A fixing plate (8) is provided on the back of the seat body (1). A first insertion block (10) and a second insertion block (19) are fixedly connected between the fixing plate (8) and the seat body (1). Both the first insertion block (10) and the second insertion block (19) are provided with insertion holes. A protective cover (20) is fixedly connected to one side of the fixing plate (8). A drive motor is fixedly connected to the protective cover (20). A gear (14) is rotatably connected to the drive end of the drive motor. A gear ring (15) is meshed with the outer circumference of the gear (14). Two sets of rotating rods (16) are fixedly connected to the gear ring (15). A connecting shaft (17) is fixedly connected to the end of the rotating rod two (16) away from the toothed ring (15). A rotating disk (9) is fixedly connected to the side of the connecting shaft (17) away from the rotating rod two (16). A rotating rod one (13) is fixedly connected to the rotating disk (9). A moving ring (12) is provided on the side of the rotating disk (9) away from the fixed plate (8). The moving ring (12) is provided on the outer periphery of the rotating rod one (13). A lifting rod one (6) and a lifting rod two (18) are connected to the moving ring (12). A backrest (5) is connected to the end of the lifting rod one (6) away from the plug block one (10).

2. The adjustable backrest swivel chair according to claim 1, characterized in that, A seat cushion (3) is laid on the seat body (1).

3. A swivel chair with an adjustable backrest according to claim 2, characterized in that, The seat cushion (3) has an arc-shaped structure.

4. A swivel chair with an adjustable backrest according to claim 1, characterized in that, The protective cover (20) is a steel structure.

5. A swivel chair with an adjustable backrest according to claim 1, characterized in that, The moving ring (12) has an elliptical structure.

6. A swivel chair with an adjustable backrest according to claim 1, characterized in that, Lubricant is applied between the movable ring (12) and the rotating rod (13).

7. A swivel chair with an adjustable backrest according to claim 1, characterized in that, The end of the lifting rod (6) away from the moving ring (12) is inserted into the insertion hole on the insertion block (10).

8. A swivel chair with an adjustable backrest according to claim 1, characterized in that, The end of the lifting rod (18) away from the moving ring (12) is inserted into the through hole on the plug block (19).

9. A swivel chair with an adjustable backrest according to claim 1, characterized in that, The backrest (5) is set at an angle.

10. A swivel chair with an adjustable backrest according to claim 1, characterized in that, The end of the lifting rod (18) away from the plug-in block (19) is fixedly connected to a stabilizing block (11), and the seat body (1) is fixedly connected to a plug-in plate (4). The stabilizing block (11) is slidably inserted into the plug-in plate (4).

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