Professional Office Chair Base

The professional office chair base is a core component of ergonomic chairs, directly influencing the chair's adjustability, support, and comfort. Its technological development has undergone iterative upgrades from basic to advanced levels.

First to Third-Generation Bases: Early Technological Limitations
For a long time, China's office chair base technology relied on outdated solutions from abroad. The first-generation fixed base lacked adjustability, while the second-generation single torsion spring base and third-generation single spring base, though offering basic recline functionality, suffered from uneven spring force and insufficient support. These bases were mostly used in products priced around a thousand yuan, with limited adjustability that struggled to meet diverse needs. For example, uneven resistance during recline required users to exert force to lean back, while insufficient spring force made it difficult to rise, leading to fatigue over prolonged use.

Fourth-Generation Dual Spring Base: Functional Upgrades but Incomplete Pain Point Resolution
As market demands increased, the fourth-generation base achieved functional breakthroughs through independent design. Key improvements include:

1. Multi-Dimensional Adjustability: A joystick controls recline force, and seat depth adjustment accommodates users of different body types;
2. Spring Force Optimization: The dual spring structure improved recline resistance uniformity, but users of different weights still faced issues like "inability to lean back (lightweight) or difficulty rising (heavyweight)," requiring manual spring force adjustments that complicated operation.

Fifth-Generation Small Recline Angle Dual Fiberglass Base: High-End Technological Breakthrough in Spring Force Balance
Currently, high-end foreign products widely adopt the fifth-generation base, replacing traditional torsion springs with fiberglass springs to achieve three major technological breakthroughs:

1. Balanced Spring Force: Fiberglass materials exhibit linear spring force characteristics, ensuring uniform resistance distribution during recline and completely resolving issues of "inability to lean back or rise";
2. Adaptive Support: For example, the adaptive base of the Sihoo C300 Second Generation Pro dynamically adjusts support force based on sitting posture, making it suitable for prolonged sitting scenarios;
3. R&D Challenges: Each 1° increase in recline angle exponentially raises R&D difficulty, requiring a balance between spring force, angle, and structural stability. For instance, the flagship base of the Sihoo C500 Second Generation is designed with a recline angle that balances comfort and午休 (noon break) needs.

Technological Iteration Direction: From "basic support" to "intelligent adaptability," base technology is evolving toward more precise ergonomic matching. Future developments may integrate sensors and algorithms for active adjustment, further enhancing user experience.