Principle of Silent Office Chair

The principle of silent office chairs mainly involves three aspects: physical shock absorption and noise reduction, the synergistic effect of material composites and structural damping, and precise treatment of sound sources.

Physical Shock Absorption and Noise Reduction

This is the most common principle for silent office chairs. At the contact points between the chair legs and the floor, elastic materials such as silicone, rubber, or felt are added. These materials have a 'damping effect' and can convert mechanical vibration energy into trace amounts of thermal energy when the chair vibrates due to external forces. For example, silent wheels typically use specially modified polyurethane or rubber composite materials with high elasticity and wear resistance on the outermost layer that contacts the ground. When the ground is uneven and impacts occur, the material deforms to fit microscopic irregularities, converting the impact kinetic energy into thermal energy from molecular chain friction within the material, thereby significantly reducing vibration frequency and sound wave propagation intensity.

Synergistic Effect of Material Composites and Structural Damping

Silent wheels achieve gradual energy dissipation through a multi-layer composite structure. There are key damping layers or suspended structures inside the rollers, such as high-damping gels or non-Newtonian fluid materials. When rolling slowly, these materials are soft and smooth; when suddenly impacted, they instantly harden, effectively absorbing shocks. There is also a 'wheel-in-wheel' design that physically isolates the vibration transmission path through flexible connectors. In addition, some office chairs use nylon-coated metal bushings at the pivot points to reduce noise from direct metal friction; rubber buffer pads are placed at the junction of the gas spring and the five-star base to also serve a silent function.

Precise Treatment of Sound Sources

Silent wheel technology treats the roller as a complete acoustic system, precisely separating and targeting the noise generated by friction and impact between the roller and the ground, as well as the noise from the internal bearing rotation of the roller. For example, the system tests the acoustic performance of different floor materials paired with the wheels, studying the 'wheel-ground interface' as a holistic acoustic model, shifting from passive noise absorption to active intervention in noise generation conditions. For instance, the silent wheels of the boss chairs in the office area of Yangzhou Library use high-molecular polyurethane material combined with an internal micro-pore structure to suppress noise during rolling. Compared to traditional plastic wheels, they can absorb sound waves and significantly reduce noise.