Spiral adjusting swivel chair tray for changing angle of torsion spring

Abstract

The present invention relates to a swivel chair tray, and more particularly relates to a spiral adjusting swivel chair tray for changing the angle of a torsion spring. The present invention mainly solves the technical problems existing in the prior art, for example, the swivel chair tray cannot adjust the angle of the torsion spring, so the adjustment degree of the seat cannot be changed and the operation is relatively inconvenient. The present invention includes a base plate, wherein the base plate is connected to a middle seat through a shaft. The middle seat is fixedly provided with a tapered tube through a tapered tube pad. A torsion spring is sleeved over the shaft, and the torsion spring is connected to an adjusting mechanism for adjusting the angle of the torsion spring through a torsion spring fixing block.

Claims

1. A spiral adjusting swivel chair tray for changing the angle of a torsion spring, comprising: a base plate, wherein the base plate is connected to a middle seat through a shaft, the middle seat is fixedly provided with a tapered tube through a tapered tube pad, a torsion spring is sleeved over the shaft, and the torsion spring is connected to an adjusting mechanism for adjusting the angle of the torsion spring through a torsion spring fixing block, wherein the adjusting mechanism comprises an upper spiral adjusting block connected to the torsion spring fixing block, the lower portion of the upper spiral adjusting block is connected to a lower spiral adjusting block, the upper spiral adjusting block and the lower spiral adjusting block are connected by a spiral groove, the lower spiral adjusting block is connected to a torsion spring force adjusting handle, a large hole is formed in the top of a middle seat, and the torsion spring force adjusting handle is inserted into the large hole.

2. The spiral adjusting swivel chair tray for changing the angle of a torsion spring according to claim 1, wherein an adjusting block gear pad is provided between the lower spiral adjusting block and the middle seat.

3. The spiral adjusting swivel chair tray for changing the angle of a torsion spring according to claim 2, wherein a limiting pin and an adjusting rod are also connected between the middle seat and the base plate.

4. The spiral adjusting swivel chair tray for changing the angle of a torsion spring according to claim 3, wherein a retaining ring is sleeved over the adjusting rod on the outside of the base plate.

5. The spiral adjusting swivel chair tray for changing the angle of a torsion spring according to claim 2, wherein a big muffler bushing is inserted between the torsion spring and the shaft.

6. The spiral adjusting swivel chair tray for changing the angle of a torsion spring according to claim 1, wherein a limiting pin and an adjusting rod are also connected between the middle seat and the base plate.

7. The spiral adjusting swivel chair tray for changing the angle of a torsion spring according to claim 6, wherein a retaining ring is sleeved over the adjusting rod on the outside of the base plate.

8. The spiral adjusting swivel chair tray for changing the angle of a torsion spring according to claim 1, wherein a big muffler bushing is inserted between the torsion spring and the shaft.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a structural schematic view of the present invention.

(2) FIG. 2 is a sectional structural schematic view of the present invention.

(3) FIG. 3 is a structural schematic view of an adjusting mechanism of the present invention.

(4) FIG. 4 is a structural schematic view of a torsion spring force adjusting handle after rotation in the present invention.

(5) FIG. 5 is a structural schematic view of an adjusting mechanism after rotation of the torsion spring force adjusting handle in the present.

(6) Components, parts and numbers in the drawings: base plate 1, shaft 2, middle seat 3, tapered tube pad 4, tapered tube 5, torsion spring 6, torsion spring fixing block 7, upper spiral adjusting block 8, lower spiral adjusting block 9, torsion spring force adjusting handle 10, adjusting block gear pad 11, limiting pin 12, adjusting rod 13, retaining ring 14, and big muffler bushing 15.

DETAILED DESCRIPTION OF THE INVENTION

(7) The following further describes the technical solution of the present invention in detail by way of embodiments with reference to the accompanying drawings.

(8) Embodiment: a spiral adjusting swivel chair tray for changing the angle of a torsion spring in this embodiment, as shown in FIGS. 1-3, comprises a base plate 1 that is connected to a middle seat 3 through a shaft 2, the middle seat is fixedly provided with a tapered tube 5 through a tapered tube pad 4, a torsion spring 6 is sleeved over the shaft, and the torsion spring is connected to an adjusting mechanism for adjusting the angle of the torsion spring through a torsion spring fixing block 7. As also shown in FIG. 3, the adjusting mechanism comprises an upper spiral adjusting block 8 connected to the torsion spring fixing block 7, the lower portion of the upper spiral adjusting block is connected to a lower spiral adjusting block 9, the upper spiral adjusting block and the lower spiral adjusting block are connected by a spiral groove, the lower spiral adjusting block is connected to a torsion spring force adjusting handle 10, a large hole is formed in the top of a middle seat, and the torsion spring force adjusting handle is inserted into the large hole. An adjusting block gear pad 11 is provided between the lower spiral adjusting block and the middle seat. A limiting pin 12 and an adjusting rod 13 are also connected between the middle seat and the base plate. A retaining ring 14 is sleeved over the adjusting rod 13 on the outside of the base plate. A big muffler bushing 15 is inserted between the torsion spring and the shaft.

(9) In use, as shown in FIG. 4 and FIG. 5, the torsion spring force adjusting handle 10 is rotated, and the upper spiral adjusting block 8 and the lower spiral adjusting block 9 are relatively moved through a spiral groove, thus adjusting the angle of the torsion spring 6.

(10) The foregoing descriptions are merely specific embodiments of the present invention, but the structural features of the present invention are not limited thereto, and any changes or modifications made by any person skilled in the art of the present invention are covered within the scope of the patent of the present invention.