Composition of Office Chairs

The composition of office chairs mainly includes components such as the bottom support frame, elastic structure, backrest, comfort components, outer covering, support frame, and other parts.

The bottom support frame is the foundational structure of an office chair, typically made by bending steel pipes into shape. For example, a hydraulic power machine is used to bend No. 14 steel pipes to form the frame for the bottom cushion. The ends are connected, and steel bars are welded in the middle. These steel bars support the mechanism for adjusting the seat position, providing stable support for the entire chair.

The elastic structure involves hanging S-shaped steel springs from the front to the back of the seat frame. These wave-shaped springs ultimately form an elastic net in the seat, offering a comfortable sitting experience for the user. At the same time, rods are placed horizontally and clamped onto the springs to add extra stability and support, ensuring that the chair does not wobble or deform during use.

For the backrest, chairs with steel or plastic frames are often made by combining mesh fabric. This design is breathable, allowing the user to stay dry during long periods of sitting. Moreover, the backrest is curved according to the comfortable sitting posture of the human body, better fitting the contour of the back and reducing fatigue from prolonged sitting.

Comfort components include lumbar pillows, headrests, and foam pads. Lumbar pillows and headrests enhance the chair's comfort by providing additional support for the lower back and head, relieving pressure from prolonged sitting. There are density requirements for the foam pads. Before installing the sponge on the backrest, a layer of particleboard is added in the middle for stability. The base also requires a cover for reinforcement, with screw holes on the cover for connecting to the support structure, further improving comfort during use.

The outer covering is usually made of leather. Workers lay the leather flat on a workbench and use templates to cut out the appropriate shape for the outer covering. The sponge is placed between the frame and the outer covering, and workers sew the sponge and outer covering together before attaching them to the seat frame, making the chair more aesthetically pleasing and durable.

The support frame includes a hydraulic device for adjusting the height up and down, a 360-degree rotating bearing, and movable wheels. These components give the office chair functions such as height adjustment, rotation, and mobility, facilitating use in different work scenarios.

Other components, such as armrests, are finally assembled by workers, making the functions of the office chair more complete.