Lifting Office Chair Spring
The spring used in lifting office chairs is usually a gas spring, also known as a pneumatic spring, which is a device that can achieve lifting function without a power supply.
Composition and Working Principle of Gas Springs
Gas springs are mainly composed of components such as an outer cylinder, an inner cylinder, a piston, and a piston rod. They are filled with high-pressure nitrogen gas inside, and the connection and isolation states between two gas chambers are adjusted through a control valve. When the valve is opened, high-pressure nitrogen gas flows from the high-pressure gas chamber to the low-pressure gas chamber, driving the piston rod to extend or retract using the pressure difference, thereby achieving the lifting function of the office chair. When the valve is closed, the gas chambers are isolated, and the position of the piston rod is fixed, maintaining the current height of the office chair. This design enables the gas spring to flexibly adjust the height or tilt angle of the office chair according to user needs without an external power supply, offering advantages such as easy operation, energy conservation, and environmental protection.
Quality Requirements for Gas Springs
High-quality gas springs need to ensure the purity of the internal nitrogen gas to avoid impurities affecting their performance and service life. At the same time, gas springs need to pass the EN16955 strength rating certification by third-party organizations such as SGS and TรV to ensure their safety and reliability. These certification standards strictly regulate key indicators of gas springs, including pressure resistance, sealing performance, and fatigue life. Only gas springs that meet the standards can be applied to furniture products such as office chairs.
Detection Objects and Contents of Gas Springs
The detection objects of gas springs for office chairs include not only the individual gas springs but also the lifting column assemblies and the assembled complete chairs. For individual gas springs, the detection focuses on performance indicators such as support force, sealing performance, and service life. For lifting column assemblies and assembled complete chairs, the detection pays more attention to the smoothness of lifting, abnormal noise, and the fit quality with the chair surface and chassis. These detection contents aim to ensure that the gas springs can operate stably and reliably during actual use, providing users with a comfortable and safe office experience.
