Office Chair Base Design

The office chair base is the core component of the seat, often referred to as the 'control center' or 'heart,' directly influencing the seat's adjustment functions, support, and comfort.

Functional Adjustment Hub

The base handles core functions such as seat tilt angle adjustment, locking, and gas lift height adjustment. For example, a four-position locking base uses mechanical locking mechanisms to adjust the backrest angle, allowing users to maintain the natural curvature of the lumbar spine in different postures, suitable for users who frequently adjust their sitting positions. High-end bases like the 'small recline dual-fiberglass base' offer balanced elasticity and smooth, large-angle recline functions, meeting the needs of long working hours or rest. The gas lift height adjustment function, achieved through the cooperation of the base and gas lift, allows for seat height adjustments to accommodate users of different heights.

Technological Iteration and Material Innovation

Base technology has undergone multiple generations of upgrades:

• Early Designs: The first three generations of bases (fixed base, single torsion spring base, single spring base) suffered from uneven elasticity and insufficient support due to material and technological limitations, only capable of height adjustment and backrest angle locking.
• Fourth Generation Improvements: Dual-spring bases improved comfort through independent designs (such as lever adjustment for recline force and seat depth adjustment), but still did not fully solve the issue of适配 (fit) for users of different weights.
• Fifth Generation Breakthroughs: The small recline dual-fiberglass base replaced torsion springs with fiberglass springs, achieving balanced elasticity and smooth recline. However, for every 1° increase in recline angle, research and development difficulty and costs multiplied.
• Latest Technologies: For example, the carbon-fiberglass composite spring base used in the Sihoo C500 II incorporates aerospace material technology to further optimize the recline experience and support stability, reducing R&D costs while enhancing performance.

Design Challenges and R&D Directions

Current base designs face three major challenges:

• Material Selection: There is a need for new, high-strength, high-toughness materials to support stability during large-angle recline, such as fiberglass and carbon fiber composites.
• Technical Team and Investment: Professional R&D teams and sufficient funding are required, for example, Sihoo invests 12%-15% of its annual sales revenue in base technology R&D.
• User Experience Optimization: Solving the problem of users of different weights being unable to 'recline comfortably or rise easily,' achieving balanced elasticity and operational convenience, for example, through intelligent adjustment systems that adapt to user weight.

Application Scenario Adaptation

Base designs need to adjust functions according to usage scenarios:

• Four-position locking bases are suitable for users who frequently adjust their sitting positions, such as creative workers or in meeting scenarios;
• Fixed-angle bases are more suitable for focused work scenarios, such as programming or writing;
• Large-angle recline bases meet the needs of午休 (noon breaks) or long rest periods, enhancing office comfort.