Office Chair Structure English

The English expressions related to office chair structures are as follows:

The design of an office chair typically includes multiple functional components, and the English names of each component are closely related to their structural characteristics. The following is a classification description from core structures to auxiliary components:

1. Parts that support and come into contact with the human body

• Headrest: Located at the top of the backrest, it is used to support the neck and head and is commonly found in office chairs with adjustable height. Its design needs to conform to ergonomics to relieve cervical spine pressure during long periods of sitting.
• Back: The main supporting structure of the chair, usually divided into fixed and adjustable types. Some high-end models of backrests feature lumbar support design to enhance the support effect on the lower back.
• Seat: The part that directly bears the weight of the human body, mostly made of high-density foam or mesh fabric. The depth and tilt (Seat Tilt) of the seat can be adjusted to meet the needs of users of different heights.

2. Auxiliary support and adjustment parts

• Armrest: Located on both sides of the seat, it provides arm support. The armrests of modern office chairs are mostly adjustable, including functions for adjusting height (Height Adjustment), angle (Angle Adjustment), and forward/backward position (Forward/Backward Adjustment).
• Gas Lift/Pneumatic Rod: A hydraulic device that connects the seat to the five-star base, enabling height adjustment of the seat through air pressure. Its load-bearing capacity and stability are important indicators for measuring the quality of an office chair.
• Swivel Joint: A joint structure that allows the backrest and seat to rotate relative to each other, usually located at the top of the support rod. Some models of swivel joints integrate a tilt lock (Tilt Lock) function to fix the angle of the backrest.

3. Base and moving parts

• Five-Star Base: A star-shaped base composed of five legs, providing overall stability. It is mostly made of aluminum alloy or high-strength plastic and needs to withstand the weight of the human body and the impact of frequent movement.
• Casters: Rollers installed at the bottom of the five-star base, usually designed as universal wheels for easy and flexible movement of the office chair on the ground. The material of the wheels (such as hard plastic or rubber) needs to be selected according to the type of ground to reduce noise and wear.

The above structures together form the functional system of an office chair, and the accurate use of their English names helps to clearly express needs in procurement, maintenance, or design communication.