Knob Adjustable Office Chair

Knob-adjustable office chairs typically offer multiple functions such as adjusting backrest firmness, chair height, locking and unlocking, adjusting lumbar support, and adjusting recline angle, as detailed below:

1. Adjusting backrest firmness: Most knob-adjustable office chairs allow users to change the firmness of the backrest by rotating a specific knob. Rotating the knob clockwise makes the chair backrest firmer, providing stronger support, suitable for individuals who need to maintain a fixed sitting posture for long periods or engage in high-intensity work; rotating the knob counterclockwise makes the chair backrest softer, offering more flexible support, suitable for those who frequently change their sitting posture or engage in light work.

2. Adjusting chair height: Office chairs are usually equipped with a vertically rotating lever for adjusting the chair's height. Rotating the lever upward raises the chair, suitable for taller individuals or those who need to maintain a higher distance from the desk; rotating the lever downward lowers the chair, suitable for shorter individuals or those who need to maintain a lower distance from the desk.

3. Locking and unlocking function: Some office chairs' levers also feature a locking and unlocking function. Pushing the lever inward locks it, fixing the chair's current state and preventing accidental movement or adjustment during use; pulling the lever outward renders it ineffective, unlocking the chair and allowing users to adjust its various parameters as needed.

4. Adjusting lumbar support: The lumbar support on some high-end office chairs can be finely adjusted using knobs. For example, on the Deli 91025 home office chair, rotating the knob behind the boss's back counterclockwise pushes the lumbar support forward, achieving a lumbar-supporting function; the EVERSEAT Flex 6Pro ergonomic chair has two knobs on its lumbar pillow, with the right knob controlling the independent lifting of the lumbar pillow and also allowing adjustment of the lumbar-supporting force through the knob.

5. Adjusting recline angle: Some office chairs also offer a recline angle adjustment function, such as the Steelcase Gesture. Its patented dual-knob design allows for infinite adjustment from 15° to 135° by rotating the metal knob on the left side of the backrest clockwise for 1-3 turns. The green marking line on the knob's dial indicates the 135° optimal recline angle recommended by ergonomics.