Office Chair Structure Names
The structural names of office chairs mainly include seat cushion, backrest, lifting gas cylinder, chair legs (or support frame), armrests, cross braces, and central support column or load-bearing rod, among others.
The seat cushion is the core load-bearing component of an office chair, directly contacting the human buttocks. It provides comfortable support through materials such as high-density foam or mesh fabric, while also distributing body weight pressure. Its design must balance breathability and durability, with some high-end models adopting ergonomic curves to fit the contours of the buttocks.
The backrest provides support for the back and is typically divided into two types: fixed and adjustable. Fixed backrests often feature an integrated design, while adjustable backrests can be adjusted in angle through mechanical structures or pneumatic devices to accommodate different sitting postures. The backrest often conceals metal frames or mortise-and-tenon structures internally, with soft padding materials on the exterior to enhance comfort.
The lifting gas cylinder is a key component for adjusting the seat height, enabling stepless lifting through pneumatic principles to match the leg length and desk height of users of different heights. It contains sealed high-pressure gas internally and must comply with safety standards to prevent bursting risks, with some products indicating weight-bearing capacities and adjustment cycles.
The chair legs (or support frame) directly contact the ground, with common forms including five-star legs (the mainstream design for office chairs), four-legged designs, or single-column legs (such as those on bar stools). Five-star legs distribute pressure through multiple support points to enhance stability; four-legged designs are often used in minimalist-style chairs; and single-column legs are commonly found on swivel bar stools. In terms of materials, metal chair legs (such as aluminum alloy) are more durable, while plastic chair legs are lighter.
The armrests provide support for the arms, reducing shoulder and neck fatigue. Fixed armrests have a simple structure, while adjustable armrests can adapt to different usage scenarios through lifting, rotation, or forward and backward sliding. Some high-end models feature soft material wrapping on the armrest surfaces to enhance tactile comfort.
The cross braces are horizontal connecting rods between the chair legs, enhancing structural stability through H-shaped or grid-shaped designs to prevent the chair from wobbling or deforming. In dining chairs or conference chairs, cross braces often serve as reinforcement components, while in office chairs, which need to balance flexibility, the design of cross braces may be simpler.
The central support column or load-bearing rod is located at the central axis of the chair and is responsible for sharing the body weight. In swivel chairs, the central column is often combined with the lifting gas cylinder to transfer pressure through a pneumatic rod or solid wood central rod; in solid wood chairs, the central rod serves as the structural core, connecting the seat cushion and chair legs.
