Locking the Backrest of an Office Chair

If the backrest of an office chair needs to be locked, you can try the following methods. If none of them work, it may be due to a damaged mechanism spring, and you should contact the merchant for handling.

• Adjusting the Adjustment Handle: Most office chairs have a handle specifically for adjusting the backrest located beneath the chair. If the backrest cannot be locked, first push this handle in and observe whether the problem is solved. If you need to adjust the angle of the backrest, press the handle down without releasing it, and at the same time, apply backward pressure with your back. After reaching the appropriate angle, release the handle, and the backrest should be fixed at that angle.
• Using the Adjustment Lever: Sit on the chair and find the adjustment lever at the rear beneath the seat. Pull the lever while slightly leaning back with your back, and then release the lever. The backrest will be fixed at the corresponding angle. If you want to restore the backrest to its original state, pull the lever again and apply a little force with your back, and the backrest will spring back.
• Knob-type Locking: Some office chairs are equipped with a circular knob beneath the chair. By rotating this knob clockwise, you can increase the resistance of the backrest until it reaches a locked state, thus fixing the backrest.
• Lever-type Locking: Some office chairs have a lever on the side or beneath the chair. Move the lever to a specific position, such as the one marked with a "Lock" sign, to fix the backrest.
• Button-type Locking: Some computer chairs have a dedicated button. Pressing this button can lock the recline angle of the backrest, and the operation is relatively simple.
• Dealing with Recline Locking Failure: For cases where the recline locking fails, first find the handle on the right side. Pushing it in to the left locks it, and pulling it out to the right unlocks it. In addition, there is usually a cylindrical knob on the chassis. Rotating it clockwise increases the rebound support force, and rotating it counterclockwise decreases it. Adjusting this knob may also solve the locking problem.

If none of the above methods can lock the backrest of the office chair, it may be that the mechanism spring on the base is broken. In this case, you can contact the merchant and ask if a new spring can be replaced. Good computer chairs usually have a relatively long warranty period. If it is within the warranty period, you can contact the merchant or manufacturer from whom you purchased the chair and request telephone guidance for repair. If telephone guidance is not possible due to technical or tool limitations, the cost of sending it back for repair is usually borne by the merchant or manufacturer.