Comprehensive Guide to Office Chair Bases

Office chair bases come in a variety of types, which can be classified into different categories based on their functional characteristics and operational methods. There are also multiple brand options available.

Classification by Functional Characteristics

1. Single-spring Base: This type of base is easy to sit on in the first half of the recline, but becomes more strenuous in the latter half. It has a short travel distance and uneven spring force distribution. Prolonged use of an office chair with this base may cause fatigue in the user, as it fails to provide uniform support throughout the entire recline process.
2. Dual-spring Base: Compared to the single-spring base, the dual-spring base has an additional spring to assist in controlling the force. This design effectively solves the problem of uneven resistance during recline, significantly improving the chair's stability and providing greater comfort to the user. For example, chairs from brands like Haworth Fern and Takeda Butterfly use this type of base.
3. Adaptive Base: The adaptive base can automatically adjust the recline force based on the user's weight, making it suitable for people of different weights. However, if the user's weight exceeds the normal range, the adjustment may not be precise enough, and comfort may be compromised. Chairs from Yongyi often use this type of base.
4. Glass Fiber Base: Also known as the dual glass fiber spring base, the deformation of the chair back during recline accounts for a very small proportion of the entire travel distance, and the recline resistance is uniform. However, due to the lack of unified production standards among different manufacturers, the user experience varies greatly. Chairs like the Herman Miller Aeron and Sihoo Doro S300 use this type of base.
5. Single Torsion Spring Base: This base has two control levers, with the front one controlling the seat cushion's升降 (rise and fall, here translated as 'height adjustment' for clarity) and the rear one controlling the recline. It has a slender shape, no伸缩度 (伸缩度 can be translated as '伸缩性' or '伸缩能力', but in this context, it likely means '伸缩范围' or '伸缩 flexibility', which is not directly applicable to the description; for simplicity, we'll omit a direct translation and focus on the lack of伸缩-related features)伸缩-related features, and no recline resistance. It is commonly found in ergonomic chairs priced under 300-400 yuan.

Classification by Operational Method

1. Mechanical Base: This is the type of base commonly used in early office chairs, with a relatively traditional operational method.
2. Wire-controlled Base: In contrast to the mechanical base, although the characteristics of the wire-controlled base are not detailed in the text, it can be inferred that its operational method may be more modern and convenient.

Common Brands

Well-known domestic base brands include Zhongtai and Yongyi, while international brands include Donati and Boke. These brands have extensive experience and a good reputation in the design and manufacturing of chair bases.