Office Chair Spring Accident

The office chair spring accident mainly refers to the explosion problem of the gas spring (pneumatic rod) in pneumatic lifting office chairs, which is caused by quality defects, improper use, and lack of supervision. It can be prevented through standardized purchasing, detailed inspection, and correct usage.

Causes of Accidents

1. Quality Issues with the Gas Spring
   If the wall of the gas spring is too thin, the material is of poor quality, or the seal is not tight, it can lead to gas leakage or a sudden increase in internal pressure. If the purity of the filled gas is insufficient (e.g., using compressed air instead of nitrogen), oxidation reactions or even explosions can occur under high temperatures or frequent friction. Additionally, excessive pre-pressure or uneven wall thickness can directly result in structural instability, increasing the risk of explosion.
2. Improper Use
   Frequent adjustment of the height or rotation can cause the gas spring to overheat, accelerating internal gas reactions. Excessive force during sitting (e.g., sudden sitting or jumping) can instantly increase local pressure, exceeding the gas spring's load limit.
3. Lack of Supervision
   Some "three-no" products (products with no manufacturer name, no production date, and no production license) lack quality inspections, and there is no unified standard for detecting the gas composition in gas springs in China, allowing inferior products to enter the market.

Typical Cases

• Ms. Liu's Incident in Xiamen: In 20XX, Ms. Liu was sitting on a pneumatic lifting chair while blow-drying her hair when the chair suddenly exploded, and the gas spring pierced her lower body, injuring her intestines with debris.
• Death of a Teenager in Jiaozhou, Shandong: In 2009, a 14-year-old boy was adjusting a swivel chair when the gas spring exploded and pierced his body, leading to his death due to blood vessel injuries despite rescue efforts.
• Accidents in Other Regions: Several gas spring explosions have occurred in Fujian, Shandong, Ganzhou in Jiangxi, and Zhoushan in Zhejiang, resulting in damage to computer cases or injuries to personnel.

Preventive Measures

1. Purchase Genuine Products: Choose products with clear manufacturer information, quality certificates, and registered trademarks, avoiding "three-no" or second-hand chairs. Prioritize well-known brands (e.g., Sihoo), whose gas springs must pass SGS and BIFMA certifications, with a wall thickness of ≥2.0 mm and nitrogen purity of ≥99.99%.
2. Inspect Product Details: Ensure the gas spring operates smoothly without jamming or abnormal noises. A blast-proof steel plate with a thickness of ≥2 mm should be installed between the seat cushion and the gas spring.
3. Adopt Proper Usage Habits: Avoid frequent adjustment of the height or rotation to reduce the risk of the gas spring overheating. Sit gently and avoid sudden sitting or jumping.
4. Pay Attention to Price and Channel: It is recommended to purchase products priced at ≥200 yuan, as low-priced products may have cost-cutting issues.