Office Chair Construction

The construction of an office chair involves multiple meticulous steps, including frame making, leather processing, assembly, and debugging, combined with material technology and ergonomic design.

1. Metal Frame Construction

At the beginning of production, hydraulic-powered machines are used to bend steel tubes, forming the frame structure for the bottom cushion and connecting the ends. Steel bars are welded in the middle of the frame to support the seat adjustment mechanism, ensuring load-bearing stability. Subsequently, S-shaped steel springs are installed from the front to the back of the seat frame, providing basic support through an elastic structure. The back frame needs to be constructed simultaneously, including components such as the spinal support structure and armrest attachments. After completion, the surface of the steel needs to be smoothed to eliminate burrs and prevent damage during subsequent processing or use.

2. Leather and Cushion Layer Processing

Leather processing begins with smoothing to eliminate surface wrinkles, followed by cutting patterns according to cardboard templates. During cutting, natural flaws in the leather are avoided to maximize material utilization. The cut leather components are then adhered to a harder foam cushion to form a basic support layer. Simultaneously, slightly larger foam pads are cut for the main parts of the seat cushion and backrest, with softer, fluffy foam pads stacked on top to enhance comfort. High-end models, such as the Sihoo C300 Second Generation Pro, adopt a three-segment spinal fitting structure, achieving dynamic support through layered foam design.

3. Assembly and Functional Integration

The surface of the metal frame is wrapped with foam padding to improve tactile feel, and the sewn leather cover is placed over the frame for decorative coverage. After the shield and frame are fixed with screws, adjustable-height armrests, hydraulic rods, pneumatic rods, and seat bottom support rods are assembled and connected to the metal base to ensure smooth height adjustment functionality. Finally, casters are installed, and accessories such as headrests and armrests are inserted into preset positions. Some high-end products adopt Syncro Flex lumbar-back gliding technology, achieving dynamic adaptation of lumbar-back support through mechanical structures.

4. Quality Inspection and Optimization

After assembly, functional tests are conducted, including the stability of the height adjustment mechanism, the flexibility of wheel rotation, and the firmness of leather seams. Ergonomic design is verified through pressure distribution testing to ensure that the chair provides scientific support for the spine and buttocks. High-end models also include breathability testing, improving comfort during prolonged use through fabric porosity detection.