A seat return chassis

Abstract

The present invention discloses a return chassis of a chair, comprising an upper turntable and a lower turntable, both of which are in the shape of thin plates and are provided with a plurality of fixing holes, a fixing pin is provided on the lower turntable, the fixing pin is connected to a rebound rod, the other end of the rebound rod is connected to a spring, the other end of the spring is connected to a spring fixing pin, the lower part of the spring fixing pin is fixed on the lower turntable, the connecting spring is connected to the rebound rod by hooking a rebound nut, a rotating wheel is provided on the rotating wheel shaft, and the rotating wheel is in contact with the return turntable. The present invention has the advantage that the chair can be automatically returned to its original position by relying on the mechanical energy stored by people turning the chair, thus eliminating the need for manual arrangement.

Description

Technical Field

[0001] The invention relates to the technical field of furniture, and in particular to a return chassis of a seat. Background Art

[0002] Chairs are a common piece of furniture in our daily lives. Rotatable chairs are used in many modern occasions to facilitate people to adjust their postures on the chairs. However, existing swivel chairs tend to make loud noises during rotation and lack an automatic return function. In public places, the seats may have inconsistent orientations and be messy. Summary of the invention

[0003] Based on the technical problems existing in the background technology, the present invention proposes a seat return chassis.

[0004] The present invention provides a seat return chassis, comprising an upper turntable and a lower turntable, both of which are thin plate-shaped and provided with a plurality of fixing holes, a fixing pin is provided on the lower turntable, the fixing pin is connected to a rebound rod, the other end of the rebound rod is connected to a spring, the other end of the spring is connected to a spring fixing pin, the lower part of the spring fixing pin is fixed to the lower turntable, the rebound rod and the connecting spring are vertically arranged, the connecting spring is connected to the rebound rod by hooking a rebound nut, the rebound rod is a flat long rod with circular joints at both ends, wherein the connecting fixing pin The circular joint has a larger diameter, and the circular joint connecting the spring fixing pin has a smaller diameter. A wheel fixing hole is provided in the middle of the rebound rod, a wheel shaft is provided in the wheel fixing hole, a wheel is provided on the wheel shaft, the wheel is in contact with the return turntable, and the cross-section of the return turntable is a symmetrical figure, including symmetrical notches and extended lines of an ellipse with a radius gradually increasing from the origin. The upper part of the return turntable is fixedly connected to the upper turntable, and the lower part of the return turntable is connected to the lower turntable through a rotating column. The position where the return turntable contacts the notch is the original position.

[0005] Preferably, the extension line shape is set to satisfy the function (X 2 +Y 2 -1) 2 -X 2 Y 2 =0.

[0006] Preferably, the spring is a tension spring.

[0007] Preferably, the rotating column and the return turntable are coaxially arranged.

[0008] Preferably, a rotation damper is provided between the rotating wheel and the rotating wheel shaft.

[0009] The chair return chassis described in the present invention has the following advantages: simple and stable structure, can be used as a rotating mechanism for various swivel chairs, and can automatically return the chair by relying on the mechanical energy stored by people rotating the chair, eliminating the need for manual arrangement, the chair can always maintain the same orientation, neat and uniform, and when the user rotates on the chair, the rotation speed can be limited due to the action of the rotation damper, making the rotation safer, without noise throughout the process, and good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic structural diagram of a seat return chassis proposed by the present invention;

[0011] Figure 2 This is a schematic diagram of the side structure of a return chassis of a seat proposed by the present invention;

[0012] Figure 3 A schematic diagram of the internal structure of a return chassis of a seat proposed by the present invention;

[0013] Figure 4 A top view of a return turntable of a return chassis of a seat proposed by the present invention;

[0014] Figure 5 A schematic diagram of a rebound rod of a return chassis of a seat proposed by the present invention. DETAILED DESCRIPTION

[0015] refer to Figure 1-Figure 5 The present invention will be further explained below in conjunction with specific embodiments.

[0016] Embodiment: A seat return chassis, including an upper turntable 1 and a lower turntable 2, both of which are thin plate-shaped and provided with a plurality of fixing holes 17, a fixing pin 3 is provided on the lower turntable 2, the fixing pin 3 is connected to a rebound rod 4, the other end of the rebound rod 4 is connected to a spring 5, the spring 5 is a tension spring, the other end of the spring 5 is connected to a spring fixing pin 6, the lower part of the spring fixing pin 6 is fixed to the lower turntable 2, the rebound rod 4 and the connecting spring 5 are vertically arranged, the connecting spring 5 is connected to the rebound rod 4 by hooking the rebound nut 7, the rebound rod 4 is a flat long rod with circular joints 8 at both ends, wherein the circular joint 8 connecting the fixing pin 3 has a larger diameter, and the circular shape of the connecting spring fixing pin 6 is larger than that of the connecting spring fixing pin 6. The joint 8 has a small diameter, and a turntable fixing hole 9 is provided in the middle of the rebound rod 4. A turntable shaft 10 is provided in the turntable fixing hole 9. A turntable 11 is provided on the turntable shaft 10. A rotation damper 16 is provided between the turntable 11 and the turntable shaft 10. The turntable 11 contacts with a return turntable 12. The cross-section of the return turntable 12 is a symmetrical figure, including symmetrical notches 13 and an extension line 14 of an ellipse with a radius gradually increasing from the origin. The upper part of the return turntable 12 is fixedly connected to the upper turntable 1, and the lower part of the return turntable 12 is connected to the lower turntable 2 through a rotating column 15. The rotating column 15 is coaxially arranged with the return turntable 12, and the position where the return turntable 12 contacts with the turntable 11 at the notch 13 is the original position.

[0017] The shape of the extension line 14 is set to satisfy the function X 2 +Y 2 -1 2 -X 2 Y 2 =0, this shape can use its own shape characteristics to slowly rotate the seat back to its original position after a person gets up and leaves the chair.

[0018] The chair return chassis described in the present invention has the following advantages: simple and stable structure, can be used as a rotating mechanism for various swivel chairs, and can automatically return the chair by relying on the mechanical energy stored by people rotating the chair, eliminating the need for manual arrangement, the chair can always maintain the same orientation, neat and uniform, and when the user rotates on the chair, the rotation speed can be limited due to the action of the rotation damper, making the rotation safer, without noise throughout the process, and good practicality.

[0019] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A seat return chassis, comprising an upper turntable (1) and a lower turntable (2), characterized in that: The upper turntable (1) and the lower turntable (2) are both in the shape of thin plates and are provided with a plurality of fixing holes (17). The lower turntable (2) is provided with a fixing pin (3), the fixing pin (3) is connected to a rebound rod (4), the other end of the rebound rod (4) is connected to a spring (5), the other end of the spring (5) is connected to a spring fixing pin (6), the lower part of the spring fixing pin (6) is fixed to the lower turntable (2), the rebound rod (4) and the connecting spring (5) are vertically arranged, the connecting spring (5) is connected to the rebound rod (4) by hooking a rebound nut (7), the rebound rod (4) is a flat long rod with circular joints (8) at both ends, wherein the circular joint (8) connected to the fixing pin (3) has a larger diameter, and the connecting spring fixing pin (6) is connected to the rebound rod (4). The circular joint (8) of (6) has a relatively small diameter. A rotating wheel fixing hole (9) is provided in the middle of the rebound rod (4). A rotating wheel shaft (10) is provided in the rotating wheel fixing hole (9). A rotating wheel (11) is provided on the rotating wheel shaft (10). The rotating wheel (11) contacts with a return turntable (12). The cross section of the return turntable (12) is a symmetrical figure, including symmetrical notches (13) and an extension line (14) of an ellipse with a radius gradually increasing from an origin. The upper part of the return turntable (12) is fixedly connected to the upper turntable (1). The lower part of the return turntable (12) is connected to the lower turntable (2) via a rotating column (15). The position where the notch (13) contacts with the rotating wheel (11) is the original position of the return turntable (12).

2. A seat return chassis according to claim 1, characterized in that: The shape of the extension line (14) is set to satisfy the function (X 2 +Y 2 -1) 2 -X 2 Y 2 =0.

3. The seat return chassis according to claim 1, characterized in that: The spring (5) is a tension spring.

4. The seat return chassis according to claim 1, characterized in that: The rotating column (15) is coaxially arranged with the return turntable (12).

5. The seat return chassis according to claim 4, characterized in that: A rotation damper (16) is provided between the rotating wheel (11) and the rotating wheel shaft (10).

Images