Height adjustable chair

Abstract

The invention discloses a height adjustable chair. The height adjustable chair comprises a seat surface, supporting legs which are arranged at the lower part of the seat surface and used for supporting the seat surface as well as a back connected with the seat surface, wherein the supporting leg comprises an upper supporting leg connected with the lower part of the seat surface, a lifting mechanism fixedly connected with the lower end of the upper supporting leg and a lower supporting leg which sheathes inside the upper supporting leg and can be telescopic up and down along the upper supporting leg; the lifting mechanism comprises a fixed block fixedly connected with the lower end of the upper supporting leg and a sliding block which is located on the lower supporting leg, has certain elasticity and is in a truncated cone shape, four supporting legs are arranged, a truncated cone-shaped first through hole matched with the sliding block is formed in the fixed block, a second through hole matched with the size of the lower supporting leg is formed in the sliding block, the sliding block sheathes the lower supporting leg by virtue of the second through hole and can move along the axial direction of the lower supporting leg, and the fixed block is sheathed on the sliding block by virtue of the first through hole. The height adjustable chair disclosed by the invention is simple in structure and low in manufacturing cost and has good popularization and application values.

Description

technical field [0001] The invention relates to the field of chairs, in particular to a height-adjustable chair. Background technique [0002] In production and life, people have different requirements for the height of chairs, so height-adjustable chairs have emerged as the times require. However, most of the height-adjustable chairs on the market are complex in structure, expensive in cost, and require additional clamping pressure, such as many Adopt hydraulic lifting, some height-adjustable chairs do not need to provide additional clamping pressure, use holes or slots on the outriggers, and then use bolts to lift and lower in sections, this structure has restrictions on adjusting the height, the minimum adjustment The height can only be determined according to the hole spacing, and cannot be adjusted arbitrarily; moreover, the seat surface of a traditional height-adjustable chair cannot bear excessive loads, which will cause the lifting mechanism to fail or even be damage...

AI Technical Summary

Problems solved by technology

[0002] In production and life, people have different requirements for the height of chairs, so height-adjustable chairs have emerged as the times require. However, most of the height-adjustable chairs on the market are complex in structure, expensive in cost, and require additional clamping pressure, such as many Adopt hydraulic lifting, some height-adjustable chairs do not need to provide additional clamping pressure, use holes or slots on the outriggers, and then use bolts to lift and lower in sections, this structure has restrictions on adjusting the height, the minimum adjustment The height can only be determined according to the hole spacing, and cannot be adjusted arbitrarily; and the seat surface of the traditional height-adjustable chair cannot bear excessive loads, which will cause the lifting mechanism to fail, or even damage the lifting mechanism

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