Follow-up top lumbar chair

Abstract

The utility model discloses a servo top waist chair relates to the technical field of seat, specifically includes chair seat and the chair back connected with chair seat, the bottom of chair seat is connected with the bottom disc, is provided with the servo device of the movable chair back on the bottom disc, servo device includes the traction plate, and the fixed support frame is connected with the bottom disc, the traction plate and fixed support frame sliding connection are arranged with return spring between the traction plate and fixed support frame, the upper part of traction plate is close to one side of chair back through the connecting rod and chair back transmission connection, the lower part of traction plate is connected with the spacing device that can limit chair back servo angle, the chair that can be dragged with the adjustment of human body back action, to improve the seat chair's degree of fit and the degree of support and the comfort.

Description

Technical Field

[0001] This utility model relates to the field of seating technology, specifically to a chair that allows the human body to move in accordance with the waist. Background Technology

[0002] With the rapid development of internet technology, more and more work can be done in front of a computer, which also means that many office workers need to sit in front of a computer for long periods of time. Maintaining a sitting posture for a long time can easily cause problems such as lower back fatigue, muscle stiffness, and even lumbar spine injury.

[0003] Most office chairs on the market today have fixed backrests that cannot be adjusted to fit the back curves of different users. When users sit down, there is often a gap between their lower back and the backrest, which lacks effective support and can easily lead to lower back discomfort and fatigue. Although some high-end chairs offer adjustable functions, they are complex in structure, inconvenient to operate, and expensive, making them difficult to popularize.

[0004] Therefore, it is necessary to provide a traction chair that is simple in structure, easy to operate, and can adapt to the movement of the human back in order to improve the comfort of use and relieve lumbar pressure. Utility Model Content

[0005] (a) Technical problems to be solved To overcome the shortcomings of existing technology, a follow-up lumbar support chair is proposed, which is a chair that can adjust its traction according to the movement of the human back, so as to improve the fit, support and comfort of the seat.

[0006] (II) Technical Solution This utility model is achieved through the following technical solution: This utility model proposes a follow-up lumbar support chair, including a seat and a backrest connected to the seat. The bottom of the seat is connected to a chassis, and a follow-up device capable of moving with the backrest is provided on the chassis. The follow-up device includes a traction plate and a fixed support frame connected to the chassis. A rotatable connecting support plate connected to the lower end of the backrest is connected to the fixed support frame. The traction plate is slidably connected to the fixed support frame. A return spring is provided between the traction plate and the fixed support frame. The upper part of the traction plate near the backrest is connected to the backrest via a connecting rod. The lower part of the traction plate is connected to a limiting device capable of limiting the follow-up angle of the backrest.

[0007] Furthermore, the fixed support frame is provided with slide rails on both sides, and the inner side of the traction plate is provided with two slide grooves that are slidably connected to the slide rails, so that the traction plate can move along the direction of the slide rails.

[0008] Furthermore, the limiting device includes a follower limiting rod mounted on the traction plate, with a connecting rod connected to the bottom of the follower limiting rod. The two ends of the return spring are respectively connected to the connecting rod and the fixed support frame. The follower limiting rod is provided with limiting teeth, and the fixed support frame is provided with a limiting paddle. The limiting paddle is provided with a torsion spring and is connected to a locking device mounted on the fixed support frame via a steel wire rope. The locking device includes a rotating shaft, with a lever connected to the end of the rotating shaft. A tension spring connected to the steel wire rope is connected to the lever. The lever rotates with the rotating shaft, causing the limiting paddle to rotate and cooperate with the fixed rod mounted on the fixed support frame to achieve the function of adjusting the position of the limiting paddle. A rotation reversing handle is connected to the end of the rotating shaft away from the lever.

[0009] Furthermore, armrests are provided on both sides of the seat, and the backrest of the chair is curved.

[0010] Furthermore, a lifting rod is provided under the seat, and the lifting rod is located on the chair leg.

[0011] (III) Beneficial Effects Compared with the prior art, this utility model has the following advantages: The following-motion backrest chair mentioned in this utility model, by setting up a follow-up device and a limiting device, enables the backrest to adaptively adjust according to the user's waist movement, realize dynamic support and traction, effectively relieve waist pressure, and improve the comfort and health of the chair. In addition, the limiting device can lock the reclining angle. The structure is simple and easy to operate, and it is suitable for people who work for long periods of time. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 yes Figure 1 A schematic diagram of the servo device.

[0014] Figure 3 yes Figure 3 A schematic diagram of the internal structure.

[0015] Figure 4 yes Figure 3 A schematic diagram of the traction plate.

[0016] Figure 5 yes Figure 3 A schematic diagram of the fixed support frame.

[0017] Figure 6 yes Figure 3 A schematic diagram of the transmission connection of the middle limit device.

[0018] Figure 7 yes Figure 6 Schematic diagram of the installation position of the torsion spring.

[0019] 1-Seat; 2-Backrest; 3-Chassis; 4-Follow-up device; 5-Return spring; 6-Limiting device; 7-Lifting rod; 8-Legged chair; 9-Wire rope; 10-Rotating connecting support plate; 41-Traction plate; 42-Fixed support frame; 43-Connecting rod; 44-Slide groove; 45-Slide rail; 61-Follow-up limit rod; 62-Connecting rod; 63-Limiting paddle; 64-Rotating reversing handle; 65-Rotating shaft; 66-Torsion spring; 67-Tension spring; 68-Pulley; 69-Fixed rod. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] like Figures 1 to 7 As shown, the following-motion lumbar support chair provided by this utility model mainly includes a seat 1, a backrest 2, a chassis 3, a following device 4, a return spring 5, a limiting device 6, a lifting rod 7, and chair legs 8.

[0022] A chassis 3 is fixedly connected to the bottom of the seat 1. The chassis 3 provides the mounting base for the follower device 4 and the limiting device 6. The follower device 4 is installed on the chassis 3. This device is the core component for realizing the follower function of the chair back. The follower device 4 includes a traction plate 41, a fixed support frame 42 and a connecting rod 43. The fixed support frame 42 is fixedly installed on the chassis 3 by bolts. A rotating connecting support plate 10 connected to the lower end of the chair back 2 is connected to the fixed support frame 42.

[0023] The follower device 4 includes a traction plate 41 and a fixed support frame 42. The traction plate 41 is a box structure without a bottom cover, with two sliding grooves 44 opposite each other on its inner side. The fixed support frame 42 has slide rails 45 on its two sides. Through the connection of the sliding grooves 44 and the slide rails 45, the traction plate 41 can move relative to the fixed support frame 42. A follower limiting rod 61 is bolted to the traction plate 41. A connecting rod 62 is connected to the bottom of the follower limiting rod 61, and bolts are connected to both ends of the connecting rod 62. There are two return springs 5. One end of the return spring 5 is connected to the bolt, and the other end is connected to the bolt on the fixed support frame 42. When the traction plate 41 moves, it will drive the connecting rod 62 to move, thereby causing the return spring 5 to be in a stretched state. The follower limiting rod 61 is provided with limit teeth to limit the movement of the return springs. A torsion spring 66 is provided on the position lever 63 and is connected to a locking device on the fixed support frame 42 via a steel wire rope 9. The locking device includes a rotating shaft 65, the end of which is connected to a lever 68. A tension spring 67 connected to the steel wire rope 9 is connected to the lever 68. The lever 68 rotates with the rotating shaft 65, causing the position lever 63 to rotate and cooperate with the fixed rod 69 on the fixed support frame 42 to realize the adjustment function of the position of the position lever 63. The end of the rotating shaft 65 away from the lever 68 is connected to a rotation reversing handle 64. By driving the rotation reversing handle, the rotating shaft 65 can be driven to rotate, thereby driving the lever 68 to rotate. At the same time, the tension spring 67 pulls the steel wire rope 9 and further drives the position lever 63 to rotate, so that it can engage or disengage with the limiting teeth on the follow-up limiting rod 61, realizing the function of limiting locking and unlocking.

[0024] The seat 1 has armrests on both sides to support the user's arms (not shown in the figure), and the backrest 2 has an ergonomic curved design to better fit the curve of the human back and improve comfort.

[0025] A lifting rod 7 is provided under the seat 1. It can be lifted by pneumatic lifting or mechanical screw lifting. The bottom end of the lifting rod 7 is installed on the chair leg 8. In this embodiment, the lifting rod 7 is implemented by gas spring. Multiple casters are installed at the bottom of the chair leg 8 to facilitate the user to move and position the seat. The height of the seat 1 can be adjusted by operating the lifting rod 7 to meet the needs of different users.

[0026] The working principle of this embodiment is as follows: When the user sits on the seat 1 and leans back, by turning the reversing handle 64 180 degrees, the lever 68 moves below the fixed rod 69, simultaneously driving the steel wire rope 9 to pull, so that the front end of the limiting plate 63 rotates to a state perpendicular to the follower limiting rod 61. The torsion spring 67 of the limiting plate 63 is constantly pulled by the steel wire rope 9 under the limiting action of the fixed rod 69 and is in a stretched state. At this time, the limiting plate 63 is adjusted to the locked state. Under the force, the backrest 2 drives the traction plate 41 to move through the connecting rod 43 and the rotating connecting support plate 10. At the same time as the traction plate 41 moves, the follower limiting rod 61 on it moves synchronously. The limiting teeth on the backrest 2 engage with the limiting lever 63 step by step until it reaches the appropriate position, thus locking the backrest 2. When it is necessary to return to the original state, the reversing handle 64 is rotated 180 degrees in the opposite direction. At this time, the lever 68 moves above the fixed rod 69 and no longer restricts the return of the torsion spring 67 of the limiting lever 63. At this time, the front end of the limiting lever 63 is parallel to the follower limiting rod 61, and the limiting teeth on the follower limiting rod 61 disengage from the limiting lever 63. The limiting lever 63 is now in the unlocked state. When the user leaves, the traction plate 41 will return to the initial position under the action of the return spring 5 and the absence of force on the backrest 2.

[0027] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the concept and scope of the present invention. Various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the design concept of the present invention should fall within the protection scope of the present invention. The technical content for which protection is sought in the present invention has been fully described in the claims.

Claims

1. A lumbar support chair, comprising a seat (1) and a backrest (2) connected to the seat (1), characterized in that: The bottom of the seat (1) is connected to a chassis (3). The chassis (3) is provided with a follower device (4) that can move with the backrest (2). The follower device (4) includes a traction plate (41) and a fixed support frame (42) connected to the chassis (3). The fixed support frame (42) is connected to a rotating connection support plate (10) connected to the lower end of the backrest (2). The traction plate (41) is slidably connected to the fixed support frame (42). A return spring (5) is provided between the traction plate (41) and the fixed support frame (42). The upper part of the traction plate (41) is connected to the backrest (2) via a connecting rod (43). The lower part of the traction plate (41) is connected to a limiting device (6) that can limit the follower angle of the backrest (2).

2. The follow-up lumbar support chair according to claim 1, characterized in that: The fixed support frame (42) is provided with slide rails (45) on both sides, and the inner side of the traction plate (41) is provided with two slide grooves (44) that can slide and connect with the slide rails (45). The traction plate (41) can move along the direction of the slide rails (45).

3. The follow-up lumbar support chair according to claim 2, characterized in that: The limiting device (6) includes a follower limiting rod (61) mounted on the traction plate (41). A connecting rod (62) is connected to the bottom of the follower limiting rod (61). The two ends of the return spring (5) are connected to the connecting rod (62) and the fixed support frame (42) respectively. The follower limiting rod (61) is provided with limiting teeth. The fixed support frame (42) is provided with limiting paddles (63). The limiting paddles (63) are provided with torsion springs (66) and are connected to the fixed support frame (42) by a steel wire rope (9). The locking device is connected to the upper locking device, which includes a rotating shaft (65). The end of the rotating shaft (65) is connected to a lever (68). A tension spring (67) connected to the wire rope (9) is connected to the lever (68). The lever (68) rotates with the rotating shaft (65) to drive the limiting lever (63) to rotate and cooperate with the fixed rod (69) set on the fixed support frame (42) to realize the adjustment function of the position state of the limiting lever (63). The end of the rotating shaft (65) away from the lever (68) is connected to a rotating reversing handle (64).

4. The follow-up lumbar support chair according to claim 1, characterized in that: The seat (1) is provided with armrests on both sides, and the back of the backrest (2) is curved.

5. The follow-up lumbar support chair according to claim 1, characterized in that: A lifting rod (7) is provided below the seat (1), and the lifting rod is provided on the chair leg (8).

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