Office Chair Cannot Rebound
The inability of an office chair to rebound may be caused by issues with the gas lift, the recline adjustment lever or lock, mechanical jamming and loose screws, or damage to the base spring or structure, and can be addressed accordingly.
Gas lift issues: If an office chair fails to rebound when sat upon, a damaged gas lift is a common cause. As a key component for supporting and adjusting the height, the gas lift may suffer from internal gas leakage or aging of the seals after long-term use, resulting in an inability to rebound normally. You can replace the gas lift yourself, which costs about 30 yuan and can be purchased independently online. When replacing, first step on the bottom of the chair with both feet and shake it to lift it up, then knock out the gas lift by tapping around its circular area. Next, install the newly purchased gas lift, first attaching it to the base, then putting the seat on top, and finally sitting on it to press it down tightly.
Recline adjustment lever or lock issues: For office lounge chairs that fail to rise after reclining, the most common cause is that the recline adjustment lever or lock has not been properly reset or is stuck in a fixed position. The reset methods vary depending on the adjustment system of the chair: For chairs with a lever adjustment system, find the adjustment lever under the seat (usually on the right side), pull it out completely, and the backrest will usually automatically return to its original position under the action of the built-in spring. If it does not reset automatically, assist by pushing the backrest forward until it is fully upright, then push the control lever into the correct fixing pin hole to lock it. For chairs with a gas spring adjustment system, find the adjustment handle under the chair, pull it upward (some models require pressing a side button), while leaning your body forward, the backrest will return to an upright position following the force of your body, and then release the handle to re-fix the angle. Some high-end ergonomic chairs use a knob adjustment system, usually with a knob located on the side or rear of the seat. Turning the knob counterclockwise usually unlocks or reduces the recline resistance, at which point leaning your body forward will allow the backrest to reset easily.
Mechanical jamming, loose screws, and other issues: If the backrest of the chair fails to rebound or the adjustment mechanism malfunctions, it may be caused by simple issues such as mechanical jamming or loose screws. First, check the adjustment lever/button to see if its travel is smooth, with no sense of jamming or complete inability to pull/reset. Examine the gaps in the adjustment mechanism, gears,ๆจ็ (paddle, here it might be better translated as 'ๆจๅจ็' or just keep as 'paddle' if it refers to a specific part in the context, but for simplicity 'ๆจ็' is kept and understood as a component part), and other components for any foreign objects that may be stuck. Observe and try to shake the chair to check if the screws connecting the backrest to the seat cushion, the base to the gas lift, and other key parts are loose. If the adjustment lever is jammed, use compressed air or a small brush to clean the gaps in the mechanism, then spray a small amount of WD-40 or a specialized lubricant onto the moving parts, and operate them repeatedly to allow the lubricant to penetrate. For chairs that fail to rebound after reclining, sometimes the control lever has been accidentally pushed into the fixing hole. Try pulling the control lever out completely, assist the backrest in returning to its original position by hand, and then push it back into the adjustment hole to fix it. Use an appropriate screwdriver or wrench to tighten any loose screws one by one.
Base spring damage or structural failure: If none of the above methods work, it may be due to damage to the base spring or a structural failure, and you will need to consider repairing or replacing the relevant components.
