Office Chair Loosening Cases

Common cases and cause analysis of office chair loosening are as follows:

1. Aging and breakage of the bottom support structure An incident of an employee's office chair collapsing occurred at a tech company in Shenzhen, primarily due to the breakage of the rubber band pull rope at the bottom. Such pull ropes are often used to adjust the tilt angle of the chair back or provide elastic support. After long-term use, material fatigue and frequent stretching can lead to breakage, causing the chair to lose structural stability. After breakage, the connection between the chair back and the base fails, potentially resulting in sudden backward or sideways tilting, especially when getting up or adjusting sitting posture, significantly increasing the risk. This case indicates that elastic components (such as pull ropes and springs) are vulnerable points in office chairs and require regular inspection for integrity.

2. Wear and tear of connectors due to high-frequency use The boss's chair at a tech company in Guangzhou experienced loosening between the seat and the chair body due to long-term high-frequency use. Such loosening usually stems from wear on metal connectors (such as bolts and rivets) or plastic clips. High-frequency use accelerates metal fatigue or plastic aging at the connection points, leading to increased gaps and noticeable seat wobbling during prolonged sitting. If not promptly tightened or replaced, this can further cause chair leg breakage or overall structural instability, posing a tipping hazard. Such issues are particularly common at the connection between the adjustable-height pneumatic rod and the seat.

3. Early failure due to connection process defects Although the wooden chair breakage incident at Baisheng Furniture was a household case, its connection process defects are universally applicable. The chair back and seat were fixed with low-density wooden wedges, which, due to insufficient density, size deviations, or bonding process defects, became loose and cracked after four months of use. Similar process issues may occur in wooden or composite material components of office chairs, such as the connection between the chair back and seat. If metal reinforcements or high-strength bonding are not used, long-term stress can easily cause loosening. Such defects are more likely to occur in low-priced office chairs, requiring special attention to the materials and processes of connection points.

Prevention and maintenance recommendations:

• Regularly inspect bottom elastic components (such as pull ropes and springs) for breakage or deformation and replace them promptly;
• Tighten metal connectors (such as bolts and pneumatic rods) every six months to prevent loosening;
• Prioritize office chairs with metal reinforcements or high-strength bonding processes to reduce the risk of connection failure;
• If abnormal wobbling or unusual noises occur in the chair, stop using it immediately and have it inspected to avoid safety hazards.