Office Chair Pneumatic Button

The pneumatic button at the bottom of an office chair is the core component for controlling the height adjustment of the seat. It achieves height regulation by operating the internal valve or mechanical locking device of the pneumatic rod, mainly divided into two types: knob-type and lever-type.

1. Knob-type Regulator The knob-type regulator is mostly designed in a circular or square shape, and height adjustment is achieved through rotational operation. Rotating clockwise lowers the seat height, while rotating counterclockwise raises it. Some knobs need to be tightened in reverse or a “click” sound should be heard after adjustment to lock the position, ensuring the stability of the seat height. This design is simple to operate, but it is necessary to pay attention to the correspondence between the rotation direction and the height change to avoid abnormal seat height due to misoperation.

2. Pneumatic Rod Lever The pneumatic rod lever is usually a metal or plastic handle-shaped lever, and height adjustment is achieved through lifting operation. To lower the seat, lift the lever upwards and press down on the seat surface with your body weight; to raise the seat, lift the lever upwards and then move your body away from the seat, and the seat surface will automatically rise under the action of pneumatic pressure. This design utilizes the elastic force of the high-pressure nitrogen inside the pneumatic rod to achieve lifting and lowering. When operating, it is necessary to balance the elastic force of the pneumatic rod with your body weight to avoid adjustment failure or damage to the pneumatic rod due to excessive force.

Safety Tips

• The pneumatic rod is filled with high-pressure nitrogen (the purity of genuine products is > 90%). Poor-quality pneumatic rods or insufficient gas purity may pose an explosion risk. Therefore, it is recommended to purchase products from genuine manufacturers and avoid using pneumatic rods from unknown sources.
• Avoid frequent height adjustments. Long-term frequent operation may accelerate the wear of internal parts of the pneumatic rod and reduce its service life.
• Regularly inspect and maintain the pneumatic rod. Observe whether there are cracks, air leaks, or abnormal noises on the surface of the pneumatic rod. If any problems are found, stop using it immediately and replace it.
• Coordinate with your body weight during operation. For example, when lowering the seat, press down on the seat surface with your body weight to balance the elastic force of the pneumatic rod, preventing the seat from suddenly rising or damaging the adjustment mechanism due to excessive elastic force.