Lifting chair capable of improving safety

Abstract

The invention discloses a lifting chair capable of improving safety. The lifting chair comprises a chair base; an outer sleeve is fixedly connected to the top of the chair base; a spring lifting mechanism is arranged in the outer sleeve in a sleeved mode; a top opening of the outer sleeve is provided with a notch; the notch is formed in the length direction of the outer sleeve; the diameter of thetop opening of the outer sleeve is smaller than the diameter of the outer sleeve; a lifting shaft rod is movably inserted into the outer sleeve; the top of the lifting shaft rod is fixedly connectedwith a chair seat; a rotating shaft is arranged between the lifting shaft rod and the chair seat; a thrust ball bearing is arranged on the rotating shaft in a sleeving mode; the thrust ball bearing isused for rotating the chair seat relative to the lifting shaft rod; a hoop is arranged at the top opening of the outer sleeve in a sleeving mode; and a hoop adjusting handle is arranged on the hoop.According to the automatic ejection type lifting chair, a spring mechanical lifting mode is adopted to replace a lifting mode of a traditional pneumatic lifting chair, so that the explosion risk of the pneumatic lifting chair is avoided and the safety of the chair is improved.

Description

technical field [0001] The invention relates to the technical field of furniture, in particular to a lifting seat that can improve safety. Background technique [0002] The lift seat refers to a swivel chair whose seat height can be adjusted up and down, and the seat surface can be rotated horizontally. Because there is a lifting device for adjusting the height under the seat surface of this seat, so the seat surface can be lifted up and down. According to whether the lifting device used is pneumatic or hydraulic, lift chairs are divided into two types: pneumatic lift chairs and hydraulic lift chairs. Due to the high cost (price) of hydraulic lift chairs, the structure is relatively complicated, and the height adjustment is not sensitive enough, the market share in the domestic market is relatively low. The pneumatic lift chair has the characteristics of low cost (price), simple structure, and flexible operation, so it is widely welcomed by consumers. It is estimated that...

AI Technical Summary

Problems solved by technology

If the purity of the nitrogen gas filled in the cylinder is not enough, the ambient temperature is too high, and the height is adjusted frequently up and down to make the piston rod and the cylinder wall constantly rub, it may cause the gas to expand rapidly and cause an explosion

In addition, in order to reduce costs, some unscrupulous factories fill high-pressure air instead of nitrogen, and its safety will be greatly reduced

If unqualified materials are used or there are problems in the processing and manufacturing process, it may also cause insufficient strength of the air pressure lifting device, resulting in gas leakage or explosion, posing a safety hazard

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