Office Chair Bottom Backrest

The following is information about products and prices related to office chair bottom backrests, with detailed introductions below:

1. Backrest Office Chair Base
   This product is a rotating and height-adjustable swivel chair base, equipped with a spring-loaded base and backrest iron. The price is ¥19.0. Its core function is to support the linkage structure between the seat and the backrest, enabling elastic adjustment of the backrest through the spring mechanism. It is suitable for basic office chairs. The material is usually steel or engineering plastic, with a load-bearing capacity that meets daily office needs. However, it lacks advanced adjustment functions and is suitable for users with a limited budget or temporary office scenarios.

2. High-End Ergonomic Chair Aluminum Alloy Bracket
   This product is a lumbar-supporting, wired-control base designed specifically for executive chairs and gaming chairs. The price is ¥1288.0. It features an aluminum alloy bracket with multi-dimensional adjustment functions: the backrest angle can be locked (usually supporting a recline from 90° to 155°), seat depth adjustment, and dynamic lumbar support. The wired control panel is integrated on the right side of the seat, allowing users to complete all adjustments with one hand. In terms of materials, the aluminum alloy frame provides high strength and light weight, while breathable mesh or genuine leather seat surfaces enhance comfort, making it suitable for long hours of office work or high-end business scenarios.

3. Xike Reclining Swivel Chair Tray Base
   This accessory is designed specifically for computer chairs with a steel plate at the rear. The price is ¥94.7. Its core structure is a thickened steel plate tray that connects the seat and the backrest, supporting the recline function (usually with a maximum recline angle of 135°). The steel plate material enhances load-bearing stability and prevents the risk of breakage, making it suitable for heavy users or scenarios that require frequent reclining for rest. The installation method is bolt fixation, compatible with most standard office chair sizes.

4. Height-Adjustable Chair Backrest Connection Tray
   This product is a specialized backrest connector for office chairs and laboratory chairs. The price is ¥22.33. Its function is to fix the angle between the backrest and the seat, supporting basic height adjustment (usually with a travel range of 5-10 cm). The material is cold-rolled steel with a rust-proof surface treatment, suitable for medical rooms, laboratories, and other scenarios that require frequent cleaning. The design is simple, without redundant adjustment functions, meeting basic needs at a low cost.

Purchase Recommendations:

• For basic support, choose the Backrest Office Chair Base (¥19.0) or the Height-Adjustable Chair Backrest Connection Tray (¥22.33);
• For comfort and adjustment functions, the High-End Ergonomic Chair Aluminum Alloy Bracket (¥1288.0) is recommended;
• For the recline function with a focus on safety, the Xike Reclining Swivel Chair Tray Base (¥94.7) is a cost-effective choice.