Office Chair Fixed Frame

The office chair fixed frame is a crucial component for supporting and securing the structure of office chairs. It comes in various types and materials, primarily divided into back frame brackets, metal frames, and four-star leg bases.

1. Back Frame Brackets: The Core Structure Supporting the Chair Back Office chair back frame brackets are typically made of plastic and designed as black backrest skeletons, serving as the core components of mesh chair back frames. Their function is to secure the mesh or upholstered materials of the chair back while connecting to the seat through universal swivel chair support structures, ensuring the stability and elasticity of the backrest. These brackets are mostly used in ergonomic chairs, featuring curved designs that conform to the natural curve of the human spine, distributing back pressure evenly. Some high-end models utilize reinforced plastics or carbon fiber composites to enhance load-bearing capacity and durability.

2. Metal Frames: The Key to Reinforcing Structural Stability The metal frames of bow-frame office chairs are another common type of fixed frame, often found in ergonomic conference chairs, negotiation reception chairs, and other settings. They are welded from high-strength metals (such as steel pipes or aluminum alloys) to form bow-shaped or S-shaped structures that are directly fixed beneath the seat. The advantage of metal frames lies in their strong resistance to deformation, enabling them to withstand significant body weight pressure while providing lumbar support through ergonomic design. Some models are equipped with adjustable slides, allowing users to adjust the frame height according to their height, enhancing applicability.

3. Four-Star Leg Bases: The Load-Bearing Core for Pressure Distribution The fixed four-star leg bases of office chairs are common base types for leisure chairs, computer chairs, and dining chairs. Made of wrought iron or aluminum alloy, they feature a diamond-shaped slanted tray structure. These bases distribute the pressure from the seat through four legs and are paired with universal wheels for flexible movement. The load-bearing capacity of four-star leg bases typically exceeds 100kg, with some industrial-grade models supporting up to 150kg. The slanted tray design prevents the chair from tipping over, while the wrought iron material, after rust-proof treatment, is suitable for humid environments. Some high-end models integrate pneumatic height adjustment rods to enable seat height adjustment.

Purchase Recommendations:

• For back frame brackets, pay attention to material toughness to prevent plastic aging and cracking;
• For metal frames, inspect the firmness of welding points to prevent loosening after long-term use;
• For four-star leg bases, ensure that the spacing between legs is reasonable to avoid instability due to an off-center center of gravity. Choosing the appropriate type based on the usage scenario (such as fixed office work or frequent movement) can significantly enhance the service life and comfort of office chairs.