Office Chair Defects
The possible defects in office chairs mainly include stability issues, caster issues, formaldehyde emission issues, five-star base quality issues, and design flaws, among others.
Stability issues are one of the more serious defects. According to a sampling inspection by the State Administration for Market Regulation, some office chairs failed the stability test. They would tip over when a load of 600 Newtons was applied to the seat and a horizontal force of not less than 20 Newtons was exerted. This makes the chair prone to tipping over when the user leans forward, backward, or sits sideways, potentially causing injuries.
Caster issues should not be overlooked either. Five batches of office chairs failed the reciprocating wear test for casters. The quality of casters directly affects the service life of office chairs, and substandard casters can severely impact the user experience.
Formaldehyde emission issues are related to human health. Four batches of products failed the formaldehyde emission test. Formaldehyde is a harmful gas, and long-term exposure can pose health risks, such as causing respiratory diseases.
The quality of the five-star base, as a crucial load-bearing component of swivel chairs, is also critical. A five-star base of poor quality is prone to breakage during use, which may cause the consumer to fall and suffer personal injuries. For example, during testing, the five-star base of some office chairs was directly crushed during the base static load test.
Design flaws cover multiple aspects. In terms of sensory experience, a seat that is "too hard" can create strong pressure on the buttocks of long-term sitters; poor material quality, such as metal seats being cold in winter; chairs with overly thick cushioning or poor breathability being stuffy in summer; and some camping chairs or low stools causing the user to "slide down and lean forward". In terms of health impact, a lack or unreasonableness of support structures, such as stools lacking back support, can easily lead to lumbar muscle strain and exacerbate lumbar lordosis with long-term use; mismatched heights of children's desks and chairs can increase the risk of scoliosis by about 40% if the furniture is too low and by about 61% if it is too high. In terms of functional design, dining chairs with large cushioning areas are prone to getting dirty and are difficult to clean; curved backrests may prevent the chair from being fully pushed under the table; some models are bulky, and the gaps between the armrests and the seat are prone to trapping dirt; some ergonomic/office chairs may have armrest structures that can cause pinching, and high-priced products may have quality issues such as loose seats and malfunctioning casters; children's study chairs that cannot be adjusted in height force children to maintain improper sitting postures for long periods; camping folding chairs/moon chairs, when used as dining chairs, often result in unstable sitting postures due to height and angle issues. In terms of safety hazards, the holes and gaps in some children's furniture do not meet national standards (they should be less than 6mm), posing a risk of trapping children's fingers.
