Office Chair Air Bag Protrusion

The protruding structure beneath an office chair is usually not an air bag but a gas spring. If an abnormal bulge appears, be alert to health and safety risks.

Firstly, it should be clarified that the core component enabling the height adjustment function of an office chair is the gas spring (gas rod). It is filled with high-pressure nitrogen gas internally and regulates the seat height and provides cushioning through compression and release. If what users perceive as an 'air bag protrusion' is actually an abnormal bulge at the bottom of the seat, it needs to be evaluated on a case-by-case basis:

1. Aging and deformation of internal seat components If the bulge is located in the seat cushion or chassis area, it may be due to the aging and breakage of internal springs, sponge, or plastic supports, resulting in local protrusion. Such issues can directly alter the force distribution on the seat. When sitting, a single hard protrusion can press against the perineal area, potentially causing increased bladder sensitivity, abnormal urination, and other health problems. Long-term use may also accelerate damage to the seat structure due to uneven force distribution, necessitating timely inspection and replacement of damaged components.

2. Abnormal protrusion of the gas spring Under normal circumstances, the height of the gas spring should be coordinated with the five-star base (the chair's base). If the top of the gas spring is significantly higher than the wheels or the edge of the base, it may be due to damage to the five-star base causing the gas rod to sink. In this case, the chair's center of gravity shifts, its stability severely decreases, posing a risk of tipping over; at the same time, the height adjustment function may fail, resulting in stuttering or sudden drops during adjustment. In such situations, use should be stopped immediately, and professional maintenance personnel should be contacted to replace the five-star base or gas spring.

3. Misjudgment and troubleshooting suggestions Some users may mistake the explosion-proof plate of the gas spring (a metal or plastic structure located at the connection between the gas spring and the seat) for an abnormal protrusion. The explosion-proof plate is a safety device designed to prevent fragments from flying out in case of a gas spring explosion, and its slight protrusion is a normal design feature that does not require treatment. If the source of the protrusion cannot be determined, the following steps can be used for troubleshooting:

• Observe the location of the protrusion: If it is on the seat surface or chassis, prioritize inspecting the internal structure; if it is at the center of the chair's bottom, focus on the condition of the gas spring and the five-star base.
• Test stability: Try gently rocking the chair. If there is significant wobbling or tilting, the five-star base needs to be inspected.
• Contact after-sales service: If you are unable to determine the cause on your own, it is recommended to take photos of the protruding area and consult the brand for advice to avoid secondary damage caused by misoperation.

Summary: Abnormal bulges on office chairs need to be handled differently based on their location and manifestation. Deformation of internal components affects health, while protrusion of the gas spring threatens safety, both requiring timely intervention. During daily use, avoid violent adjustment of the seat height and regularly inspect the condition of the five-star base and gas spring to extend the chair's service life and reduce risks.