Office Chair Fails to Rebound

The failure of an office chair to rebound may be caused by mechanical jamming, airbag malfunction, adjustment device failure, or improper operation, and requires targeted solutions based on the specific cause.

1. Mechanical Jamming
If the seat switch is not reset, or foreign objects such as coins, keys, cables, or fabric fibers get stuck in the slide rails, backrest pivot points, or gaps in the chassis, the rebound function may fail. Solution: First, check if the seat switch is in place and clear any visible foreign objects from the slide rails; focus on inspecting the pivot points at the bottom of the backrest and the junction between the seat and the chassis, using tweezers or fine tools to remove any obstructions and ensure smooth movement of moving parts.

2. Airbag Malfunction (for airbag-equipped seats)
If the seat uses an airbag design, air leakage can result in insufficient or complete loss of rebound force. Solution: Check if the air control valve and switch at the bottom of the seat are functioning properly (e.g., whether the buttons can be pressed and if the valve is loose); if the chair still fails to rebound, contact a professional technician to reinflate or replace the airbag components. Do not attempt to disassemble it yourself to avoid risks associated with high-pressure gas.

3. Adjustment Device Failure

• Handle/Gas Cylinder Issues: A loose handle or damaged gas cylinder (e.g., air leakage or failure of the internal high-pressure nitrogen) can cause adjustment failure. Solution: Try rotating the chassis knob clockwise to increase rebound force; if the gas cylinder does not respond, replace it with a new one (requires professional tools such as pipe wrenches and rubber mallets for operation).
• Hydraulic System Failure: A malfunctioning gas spring can result in the loss of both height adjustment and rebound functions. Solution: Replacement of the gas spring should be performed by a professional to avoid the risk of high-pressure nitrogen leakage.
• Lock Block/Tongue Failure: Worn, broken lock tongues or deformed lock posts can cause the backrest to become stuck. Solution: Clean moving parts (e.g.,拨片 (paddle), gear pivot points) and apply WD-40 lubricant; if the damage is severe, purchase universal replacement parts.
• Spring Failure: A broken or inelastic coarse spring responsible for rebound. Solution: Apply lubricant to the control rod connection shaft and chassis; if ineffective, replace the spring or related components.

4. Improper Operation

• Control Rod Jamming: When leaning back, the control rod under the seat may be accidentally pushed in or not fully pulled out, preventing the lock tongue from rebounding. Solution:
  • Lever-adjusted chairs: Fully pull out the adjustment lever, assist in pushing the backrest back to an upright position, and then push the control rod into the fixing hole.
  • Gas spring-adjusted chairs: Pull the handle (or press the button) while leaning forward, and release the handle once the backrest is reset.
  • Knob-adjusted chairs: Rotate the knob counterclockwise to unlock and lean forward to reset the backrest.
• Accidental Activation of 'Rocking Function': The chair enters rocking mode, preventing it from locking at a fixed angle. Solution: Locate the side adjustment lever or lock and push it back to the locked position.