Cylindrical Pillow Office Chair
The cylinder under an office chair is usually a gas lift, whose main function is to adjust the chair's height. Here is a detailed introduction to gas lifts:
1. Working Principle of Gas Lifts
Gas lifts are filled with high-pressure nitrogen gas internally and achieve lifting and lowering functions through a piston structure. When the adjustment switch is pressed, the gas flows upward from the bottom, pushing the piston to raise the seat. When a person sits down, the pressure on the seat causes the gas to flow back, lowering the chair. This process relies on the sealing of the gas lift and the balance of gas pressure. High-quality gas lifts can withstand 120,000 lifting cycles, with a service life of up to 8 years without gas leakage.
2. Safety Risks and Prevention of Gas Lifts
Poor-quality gas lifts pose explosion risks, mainly due to thin tube walls or defective sealing processes. High-temperature environments (such as direct sunlight) may exacerbate gas expansion, leading to tube wall rupture. Users weighing over 90 kilograms should pay special attention: They must choose chairs with steel five-star bases, which have stronger load-bearing capacity. At the same time, check whether the base is equipped with an explosion-proof steel plate (usually located between the gas lift and the seat cushion), which can effectively block explosion fragments. Additionally, verify whether the steel stamp markings on the gas lift are complete (including information such as the manufacturer, safety certification, and gas pressure level), and avoid purchasing unbranded or Class III gas lifts (whose explosion probability is several times that of Class IV gas lifts).
3. Extended Explanation of Cylindrical Pillows
It is important to distinguish between office chair accessories and other cylindrical pillow products. For example, car neck pillows and side-sleeping leg-clamping pillows, although also cylindrical in design, have significantly different functions and materials: the former are often filled with PP cotton, emphasizing soft support; the latter may use memory foam or down, focusing on fitting the body's curves. These products have no direct connection with office chair gas lifts. When purchasing, it is necessary to clarify needs based on the usage scenario.
Summary: The cylindrical components of office chairs are mainly gas lifts, and their safety directly depends on the material and workmanship. Users should prioritize products that have passed international safety certifications (such as BIFMA and SGS) and regularly check the condition of the gas lift (such as whether the lifting is smooth and whether there are any abnormal noises) to reduce usage risks.
