Office Chair Rebound Sound

The sound that occurs when an office chair rebounds is usually related to a lack of oil in the rocking base/reclining pivot, a malfunction in the linkage structure between the seat and the backrest, or loose or worn components.

1. Lack of oil in the rocking base/reclining pivot
   The reclining function of an office chair relies on springs and pivots. If lubricating oil is not replenished over a long period, dry friction between components will produce a harsh creaking sound, which is particularly noticeable during reclining and rebounding. Such abnormal noises are mostly concentrated at the connecting pivot between the backrest and the base, manifesting as high-frequency friction sounds. Solution: Use WD-40 or a lubricating oil with good fluidity to spray on the reclining pivot, spring connection points, and other areas, and move the backrest back and forth several times to ensure thorough penetration and lubrication.

2. Malfunction in the linkage structure between the seat and the backrest
   Office chairs with a reclining function usually have components such as springs, buckles, or connecting rods at the connection between the backrest and the seat. After long-term use, the springs may deform due to fatigue, resulting in uneven rebound force. Worn buckles or loose connecting rods may cause jamming, leading to a "click" sound or metal friction sound when the backrest resets. Solution: First, check whether the springs at the connection points are deformed. If the elasticity is reduced, they need to be replaced. Second, check whether the buckles are loose or broken, and replace them with new ones if necessary. Finally, add lubricating oil to the moving parts of the connecting rods to reduce friction.

3. Loose or worn components
   If the moving components between the backrest and the base (such as screws, connecting rods of the rebound force adjustment mechanism) become loose due to long-term use, or if the connecting rod of the rebound force knob is worn, it will cause friction sounds between components when the backrest rebounds. Such problems mostly manifest as low-frequency vibration sounds or intermittent abnormal noises. Solution: Use tools to tighten all visible screws, especially those at the connections between the backrest and the base, and between the seat and the backrest. If the connecting rod of the rebound force adjustment mechanism is severely worn, replace it with new parts. Apply lubricating grease to the worn areas to reduce direct metal contact.

If the abnormal noise still persists after following the above steps, it is recommended to contact a professional repair technician to further inspect the internal structure and avoid damage caused by self-disassembly.