Telescopic lifting rod principle?

The active lifting of the clothes drying rod, the clothes drying rod can do certain movement and has certain intelligent function, in the following can do an active place without rain, so that the clothes are not wet by the rain, that is, the manual flexible clothes drying rod has the function of active lifting and moving back and forth. The main use is the function and principle of mechanical products, and the composition of the machinery to carry out a reform of the clothes drying pole.

The basic principle is that the interior 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, and the cross-sectional area on both sides of the piston is different, one end is connected with the piston rod and the other end is not, under the action of gas pressure, the pressure to the side of the small cross-sectional area is generated, that is, the elasticity of the pressure bar, people sit on the lifting shaft pressure, the lifting shaft will gently decline, the speed is uniform. It can go to the lowest point. Do not give the lifting shaft external force, lifting shaft rises back to the highest point.