Office Chair Chassis Models

Office chair chassis models vary depending on the manufacturer and product type, and there is currently no unified classification standard. Common models include the SYM series and TF series from Foshan Taifeng, as well as the lx-c004 from Lixin, with functional types covering single-spring, dual-spring, adaptive, and more. The following provides an explanation from the perspectives of specific models and functional types:

I. Specific Manufacturers and Models

1. Foshan Taifeng Furniture Accessories Co., Ltd.
   Offers multiple series of chassis models, including:

   • SYM Series: Such as SYM001A, SYM001B, SYM001AH, as well as SYM003FA, SYM003FB, SYM003FC, etc.
   • TF Series: Such as TF005, TF005N, TF005S, TF019, TF019N, TF019-1, etc.
     These models have all passed international safety standard tests such as ANSI/BIFMA X5.1-2017 or EN 1335-2, support functional customization, and are suitable for mid-to-high-end office chairs.

2. Lixin Hardware Factory
   Mainly offers the lx-c004 chassis model for executive chairs, focusing on wholesale sales, suitable for executive chair bases, and emphasizing structural stability.

II. Functional Type Classification
The functional type of the chassis directly affects the user experience, with common classifications as follows:

1. Single-Spring Chassis
   Simple in structure, with a short stroke and uneven spring force distribution, commonly found in basic office chairs, with lower costs but limited comfort.

2. Dual-Spring Chassis
   Enhances stability through a dual-spring design, providing more even force distribution when reclining, with typical representatives including models such as Haworth Fern and Gaotian Butterfly.

3. Adaptive Chassis
   Incorporates an intelligent adjustment mechanism that automatically matches the reclining force according to the user's weight, avoiding the hassle of manual adjustment, as used in some products from UE.

4. Glass Fiber Chassis
   Uses glass fiber-reinforced materials, providing uniform reclining resistance and strong durability, commonly found in high-end ergonomic chairs such as Herman Miller Aeron and Sihoo Doro S300.

5. Synchronous Tilt Chassis
   Features a linked design between the seat cushion and backrest, maintaining the natural curve of the body when reclining and improving lumbar support, commonly found in mid-to-high-end products.

6. Wire-Controlled Chassis
   Integrates functions such as height adjustment, reclining, and locking into a single control lever, offering convenient operation, commonly found in modern minimalist office chairs.

Summary: When selecting a chassis, it is necessary to comprehensively evaluate based on specific models (such as the SYM/TF series from Foshan Taifeng and the lx-c004 from Lixin) and functional types (such as adaptive and glass fiber materials), prioritizing reference to the test standards and customization options provided by the manufacturer.