Office Chair Backrest Unreliable

If the backrest of your office chair cannot be fixed, you can try the following solutions:

1. Adjust the Locking Mechanism

Most office chair backrests are fixed through mechanical locking. If the locking fails, try reoperating the locking mechanism. After leaning into the desired position, press the locking button all the way down, lean back slightly with your back, and a 'click' sound indicates successful locking. If it still cannot be fixed, the locking mechanism may be deformed or the spring may have failed, requiring further inspection.

2. Inspect and Repair Loose Parts

1. Loose Adjustment Rod Screws
   Long-term use may cause the screws at the base connection to loosen. Use a Phillips screwdriver to rotate the plastic cover plate at the base counterclockwise. After exposing the metal fixing frame, use a wrench to tighten the 6-8 fixing screws one by one (it is recommended to operate symmetrically at 90° intervals to prevent uneven force application), ensuring a torque of ≥5N·m.

2. Failed Spring Retention
   If the spring pin at the bottom of the backrest slips out or the spring deforms, the backrest cannot be fixed. Use needle-nose pliers to re-insert the slipped spring hook into the slot; if the spring is deformed, measure the original spring length and purchase a replacement spring with a diameter of 3-5mm online (costing about 5-15 yuan).

3. Excessive Gap in the Pneumatic Rod
   Insufficient support from the pneumatic rod can cause the backrest to wobble. Remove the dust cover at the bottom of the seat, find the black plastic adjustment knob, and rotate it counterclockwise to increase the support force. It is recommended to test the rebound resistance in stages of 30° to avoid over-adjustment.

3. Replace Parts

If the adjustment rod or pneumatic rod is damaged, new parts need to be replaced. The pneumatic rod should be purchased according to the original model to avoid size mismatch; if the adjustment rod is damaged, it can be solved by replacing the rod or adding a metal support (increasing the load capacity to 150kg).

4. Emergency Reinforcement Techniques

If you don't have professional tools, you can make temporary repairs: Cut a bicycle inner tube into 3cm-wide tape and wrap it around the joint between the backrest and the base to increase friction; or use rubber bands to tie the movable joints of the pneumatic rod to limit the swing amplitude. Such operations can maintain stability for 3-7 days.

5. Seek After-sales Assistance

If the above methods are ineffective, it is recommended to contact the seller's after-sales service. Handan Qiyun Office Furniture Co., Ltd. provides repair parts and whole-chair solutions, supports customized reinforcement designs (such as thickened adjustment rods or high-density nylon gears), and can provide further technical guidance.

Daily Maintenance Suggestions: Check the tightness of the screws every quarter and avoid overloading the chair to extend its service life.