Office Chair Reclining Principle

The principle of reclining an office chair mainly relies on three adjustment mechanisms: cable control adjustment, mechanical angle adjuster, and gas spring adjustment. Here is a detailed introduction:

Cable Control Adjustment

The principle of cable control adjustment is similar to that of a bicycle brake cable. Its structure consists of an outer layer and an inner core. The outer layer is a coiled metal protective sleeve that is bendable but non-extensible, while the inner core is a steel wire rope. On an office chair, when the user flicks the button or paddle under the armrest, this action acts on the inner core steel wire rope. If the inner core steel wire rope is tightened, it will pull the locking device under the seat, fixing the backrest angle at the current position. If the inner core steel wire rope is loosened, the locking device is released, allowing the backrest to freely adjust its angle. This adjustment method is relatively convenient, as users can simply operate at the armrest to change the backrest angle. It is commonly found in some modern-designed office chairs that prioritize user experience.

Mechanical Angle Adjuster (Manual Angle Adjuster)

Mechanical angle adjusters are commonly found in some traditional office chairs. They achieve backrest angle adjustment through a locking gear mechanism. In a stationary state, the locking gear pops out and locks under the action of a spring, fixing the backrest angle. When the user turns the angle adjustment handle on the side of the seat, the rotation of the handle drives the internal mechanism, causing the locking gear to retract. Once the locking gear is retracted, the connection between the backrest and the seat is no longer restricted, allowing the user to adjust the backrest angle according to their needs. After adjusting to the desired angle, releasing the angle adjustment handle causes the locking gear to automatically pop out under the action of the spring, re-locking and fixing the backrest at the newly adjusted angle.

Gas Spring Adjustment

Gas spring adjustment is commonly found in executive chairs with a rocking function. When adjusting the backrest angle, the user usually needs to pull up the long lever under the front of the seat while leaning back. Faults in gas spring adjustment may be related to the gas spring itself, the linkage rod, or the locking valve. The gas spring is filled with high-pressure gas. By operating the long lever, the flow and pressure changes of the gas can be controlled. The linkage rod is responsible for transmitting the operation of the long lever to components such as the locking valve, which plays a role in controlling the fixation of the backrest angle. When these components are functioning properly, the user can smoothly adjust the backrest angle and fix it.