Spring Office Chair Incident

The "Spring Office Chair Incident" primarily refers to explosion issues caused by component defects in pneumatic lifting swivel chairs, rather than traditional spring-structured office chairs.

Typical Explosion Cases

1. 2009 Jiaozhou, Shandong Incident: A 14-year-old boy was fatally injured when the top rod of a pneumatic chair pierced his buttocks while adjusting it, leading to excessive blood loss.
2. 2010 Xiamen Incident: A woman suffered rectal tears when sitting on a lifting chair while blow-drying her hair; screws, gaskets, and other fragments were propelled into her body due to the chair explosion.
3. 2017 Anhui Incident: An office chair exploded, breaking into two pieces and damaging a computer host.

Causes of Explosions

1. Quality Issues with Pneumatic Rods
   • Thin Wall Thickness: The wall thickness of pneumatic rods should be ≥2.0 millimeters. If it falls below this standard, explosions can occur when pressure exceeds the tolerance limit.
   • Insufficient Gas Purity: Pneumatic rods should be filled with inert gases (such as nitrogen). If the purity is insufficient or replaced with compressed air, a sudden increase in pressure under high temperatures can lead to explosions.
   • Sealing Defects: Leakage from sealing rings or the absence of explosion-proof steel plates can cause rapid gas release, triggering explosions.
2. Improper Use
   • Frequent Adjustments: Frequent lifting or rotating adjustments can overheat the pneumatic rod, increasing the risk of explosion.
   • Abrupt Operations: Sitting too forcefully or adjusting the handle too abruptly can impact the pneumatic rod, causing component damage.

Preventive Measures

1. Purchase Genuine Products
   • Choose products with clear manufacturer information, quality certificates, and registered trademarks, preferably priced above 200 yuan.
   • Check the smoothness of the pneumatic rod's lifting mechanism and ensure an explosion-proof steel plate (thickness ≥2 millimeters) is installed between the seat cushion and the pneumatic rod.
2. Usage Precautions
   • Avoid frequent lifting adjustments to reduce friction and heat generation in the pneumatic rod.
   • Regularly inspect chair components and immediately discontinue use if air leakage or unusual noises are detected.

Market Supervision Situation

In 2020, a national market supervision inspection revealed that 23.3% of office chairs failed quality tests, with 17 batches being swivel chairs. The main issues were substandard high/low-temperature resistance of pneumatic rods and the absence of explosion-proof steel plates.