The gas cylinder of a WITHUS children's chair usually operates based on the principle of a pneumatic rod, which is similar to that of an

office chair's pneumatic cylinder. It mainly relies on the compression and expansion of gas inside to achieve height adjustment or

other functions.

The specific working process is as follows: - **Structural composition**:

The cylinder is composed of a sealed hollow pipeline (cylinder) and connecting components, and is

filled with gas inside, usually nitrogen. There is a piston inside the cylinder, which is matched with a sealing ring to ensure

airtightness, and is connected to other connecting components through a connecting rod. In addition, there is also a valve,

which is usually controlled by a handle and is used to control the flow of gas in and out of the cylinder. - **Working principle**:

When an external force acts on the chair, such as a child sitting on the chair or manually adjusting the

handle, it will cause a change in the internal gas state of the cylinder. If the handle is pressed to open the valve, the gas will flow

in or out. When gas flows in, it will be compressed, and the increased gas pressure will push the piston to move, thereby driving

the chair to rise or fall. When the piston reaches the desired position, the valve is closed, the gas is sealed inside the cylinder, and

the chair is fixed at this height,it has a lock function when need to fix the turning,and can release when no need to lock,easy to

operate.

In short, the children chair gas cylinder of the WITHUS brand uses the external force to change the state of the internal gas, and realizes the

movement of the chair through the movement of the piston, so as to achieve functions such as height adjustment.