The more common chair lifts on the market are pneumatic and spiral. The lift chair has different methods of descending the chair according to the type, material and structure of the chair during use. I suggest you try it like this:
1. Air lift chair: It is a new type of chair. The internal device has a cylinder. The piston rod in the cylinder moves up and down to support the swivel chair. The gas pressure rod is filled with nitrogen gas, but if the purity of the gas is lower than 90%, there is a potential safety hazard during the use of the lift chair. If the gas pressure rod is not tightly sealed, the gas will be thrown out (must purchase a qualified chair) . When the chair is lowered, it is necessary to sit on the chair and then lift up the joystick at the lower part of the seat, and the weight can be easily reduced by the weight of the body.
2. Free-style gas spring lift chair: It is relatively simple in structure, consisting of a closed cylinder, a piston in the cylinder, and an outer piston rod. The air pressure in the cylinder is much larger than the outside, and there are small holes on both sides of the piston in the cylinder. According to the physics knowledge of middle school, the piston rod is pressed inward and the resistance is constant. At this time, it is easy to move up and down the chair by simply moving up and down the control rod.
