Office Chair Bent Back

An office chair that is bent back and cannot be reset is usually caused by improper operation, foreign object blockage, or mechanical component failure, and can be resolved through targeted methods. The specific causes and handling methods are as follows:

Improper Operation

If, when the backrest is tilted backward, the control lever under the seat is accidentally pushed in or gets stuck below the fixing hole, the locking tongue cannot rebound, and the backrest will be locked. Alternatively, if the control lever is not fully pulled out and the locked state is not released, reset failure will also occur. Solution: Locate the control lever, pull it out completely with force and hold it. The backrest will usually rebound to the upright position under the action of the internal spring. After resetting, push the control lever back into the fixing hole to lock the angle. For chairs with a lever adjustment system, if the backrest does not automatically reset after the control lever is fully pulled out, assist by pushing the backrest forward with your hand. Once it is fully upright, push the control lever into the correct fixing pin hole to lock it. For chairs with a pneumatic rod adjustment system, find the adjustment handle under the chair, pull it upward (for some models, press the side button), lean forward at the same time, and the backrest will return to the upright position following the body's force. Release the handle to re-fix the angle. For high-end ergonomic chairs with knob adjustment, there is usually a knob on the side or back of the seat. Rotate the knob counterclockwise to unlock or reduce the backward resistance. Then lean forward, and the backrest can be easily reset.

Foreign Object Blockage

The pivot area at the bottom of the backrest and the gaps in the chassis mechanism are prone to being blocked by items such as fallen clothing or tangled data cables, preventing the backrest from resetting. Solution: Place the chair on a flat surface, ensure there is enough space around it, carefully check the pivot area at the bottom of the backrest and the joint between the seat and the chassis for any visible foreign objects, and clean them thoroughly.

Mechanical Failure

If the backrest still cannot rebound after performing the correct operations, it may be a mechanical component failure. Common failure types: Hydraulic system failure (damage or failure of the hydraulic rod), lock block/locking tongue failure (abnormal movement, wear, or breakage of the locking tongue), lock post deformation (the lock post that cooperates with the lock block is bent, causing misalignment and jamming), control paddle damage (the metal paddle on the chassis that controls the backward tilt is broken or deformed), and spring failure (the reset tension spring loses its elasticity or breaks). Judgment method: While keeping the control lever pulled out, assist by pushing the backrest forward with your hand. If you feel that the spring is completely powerless, it may be a spring failure. Handling suggestion: If the above methods are all ineffective, consider repairing or replacing the relevant components.