Office Chair Shock Absorption Structure

The shock absorption structure of office chairs achieves support, cushioning, and dynamic adaptation functions through the synergistic action of elastic components, damping mechanisms, and adjustment parts. Common types include spring-type, hydraulic damping-type, and pneumatic buffer-type structures. The structural design is divided into built-in and external types, and some chairs also enhance comfort through shock absorption components in the chair legs and seat cushions.

1. Core Structural Components

• Elastic Components: These are the foundation of shock absorption, such as coil springs, airbags, rubber, or high-resilience foam. Coil springs store energy through deformation and release cushioning force upon rebound; airbags rely on gas compression and expansion for shock absorption, commonly found in pneumatic buffer-type structures; rubber or high-resilience foam absorb impact through their own elasticity, often used in the shock absorption systems of seat cushions and chair backs.
• Damping Mechanisms: These control the speed of vibration, preventing sudden bouncing or slow sinking of the chair. Hydraulic oil damping consumes energy through the resistance of liquid flow, offering strong stability; pneumatic damping utilizes changes in gas pressure for cushioning, with a more sensitive response; friction damping consumes vibration energy through the frictional force between components, with a simple structure but lower durability.
• Adjustment Parts: Such as knobs, levers, or pneumatic rods, are used to adapt to different weights and sitting postures. By changing the preload of elastic components (e.g., adjusting the compression of springs) or the size of damping channels (e.g., controlling the flow of hydraulic oil), dynamic adjustment of shock absorption intensity is achieved.

2. Classification by Shock Absorption Principle

• Spring-Type Shock Absorbers: With metal springs as the core, they offer good elasticity and low cost but have poor cushioning uniformity, commonly found in basic-model chairs.
• Hydraulic Damping-Type Shock Absorbers: Utilize the resistance of hydraulic oil flow for shock absorption, offering strong stability and uniform cushioning, often used in high-end chairs, such as the liquid damping adjustment mechanism in the Anqing ZTE-type structure.
• Pneumatic Buffer-Type Shock Absorbers: Rely on gas expansion and contraction for shock absorption, with a sensitive response, suitable for scenarios requiring rapid rebound, such as the airbag design in the Jiaxing adjustable sitting-type structure.

3. Classification by Structural Design

• Built-in Shock Absorbers: Integrated within the chair frame, they offer a clean appearance, suitable for minimalist-style office chairs, but have higher maintenance difficulty.
• External Shock Absorbers: Independently installed at the bottom of the chair, they can be individually removed and replaced, offering convenient maintenance, often used in adjustable chairs, such as the pneumatic rod external design in the Jiaxing structure.

4. Shock Absorption Processes for Special Scenarios

• Chair Leg Shock Absorption Components: Rubber or PU shock absorption pads are embedded at the bottom of chair legs to absorb vibrations and noise generated during movement, enhancing quietness.
• Seat Cushion and Chair Back Shock Absorption Systems: Combine high-resilience foam with elastic shock absorption components (such as spring serpentine springs or elastic bands) to achieve fine cushioning according to the distribution of human body pressure, commonly found in conference room chairs and high-end office chairs.