Office Chair Rebound Mechanism
The rebound mechanisms of office chairs mainly include gas spring rebound mechanisms, spring rebound mechanisms, three-frame three-spring catapult structures, and high-rebound surface designs.
Gas Spring Rebound Mechanism: The gas spring is the core component of this rebound mechanism, using gas and liquid as working media. During the use of an office chair, when a person sits on the chair and applies an external force, the gas pressure inside the gas spring changes. For example, when a person sits down and the chair's height decreases, the gas inside the gas spring is compressed; when the person stands up and the external force disappears, the gas pressure inside the gas spring pushes the piston rod to restore it to a relatively balanced position, thereby achieving the chair's rebound and returning the chair to an appropriate height. This rebound mechanism is easy to adjust and can quickly respond to human movements, making it relatively common in the market.
Spring Rebound Mechanism: Springs are generally made of elastic materials such as spring steel. During height adjustment of the chair, the spring undergoes stretching or compression deformation, storing elastic potential energy in the process. When the external force applied to the chair is removed, the spring relies on its unique elastic properties to return to its original shape and length, while releasing the previously stored elastic potential energy, generating a force opposite to the external force, causing the chair to return to a relatively stable position. The spring rebound mechanism has a relatively simple structure and low cost, and is widely used in some basic office chairs.
Three-Frame Three-Spring Catapult Structure: Some ergonomic chairs, such as the Sihoo B100Pro, adopt this unique structure. It achieves cushioning and rebound through the mutual cooperation of springs and spring leaves. This structure can automatically adapt to various sitting postures without the need for manual adjustment by the user. When a person sits down, the springs and spring leaves will deform accordingly according to the person's pressure and posture changes, providing stable support for the lumbar spine and sacrum, effectively reducing fatigue caused by prolonged sitting.
High-Rebound Surface Design: This design adopts an open-cell foam structure. When the seat is under pressure, air can flow through the micro-pores, thereby dispersing the pressure instead of relying solely on the thickness of the material to absorb the impact. This characteristic allows the seat to maintain more than 80% of its initial support force during long-term continuous use, and its dynamic response speed is 30% - 40% faster than that of memory foam, making it very suitable for office scenarios that require frequent standing up.
