Sit on the chair, press and hold the operating lever to press it down with body weight.
The reason why the lift chair can rise and fall is that there is an air bar in the lifting device. The air bar is an elastic element that can support, cushion, brake, height adjustment and angle adjustment with gas and liquid as the working medium.
The basic principle is that the piston is filled with high-pressure nitrogen. Because there is a through hole in the piston, the gas pressure at both ends of the piston is equal, but the sectional areas at both sides of the piston are different. One end is connected with a piston rod and the other end is not. Under the effect of the gas pressure, the pressure on the side with small sectional area is generated, that is, the elasticity of the gas bar. When people sit on the piston to pressure the lifting shaft, the lifting shaft will fall gently, The speed is even and can be reduced to the lowest point. No external force is given to the lifting shaft, and the lifting shaft rises back to the highest point. With the help of the release device, the gas spring can stop at any position in the travel, and has a large locking force after stopping.