Safe Use of Office Chairs

When using office chairs safely, it is essential to pay close attention to the gas lift, sitting posture, choice of configuration, and frequency of movement. Here are the specific precautions:

1. Safe Use of the Gas Lift
The gas lift is the core component for adjusting the height of an office chair, functioning by compressing or releasing high-pressure nitrogen gas. When using it, avoid the following behaviors:

• Prohibit stepping or improper use: Do not use the gas lift as a footrest or strike it with sharp objects, as this may damage the internal structure and pose a risk of explosion.
• Avoid using incorrect lubricants: Some users may use general-purpose lubricants like WD-40 to maintain the gas lift, but these products can corrode the seals, leading to air leaks or failure. It is recommended to use specialized lubricants or contact the manufacturer for maintenance.
• Choose compliant products: Prioritize purchasing chairs equipped with a Class 4 gas lift (such as the Henglin L700), which offers higher pressure resistance and stability. Also, ensure the product has passed explosion-proof chassis certification to reduce the likelihood of accidents.

2. Seat Height and Sitting Posture Adjustment

• Height adjustment: Adjust the seat so that your feet are flat on the ground, with the angle between your thighs and calves maintained at 95°~100°. Avoid having the chair too high, which can cause your legs to hang in the air (requiring a footrest for support), or too low, which increases pressure on your knees.
• Angle and support: Sit with a slight backward tilt of 100°~110°, ensuring your back, especially your lower back, is in contact with the chair back. Adjust the lumbar support to the position that supports the natural curve of your lumbar spine. The height of the armrests should allow your elbows to hang naturally, with your forearms resting comfortably on the armrests or desk, and the angle between your upper and lower arms close to 100°, reducing strain on your shoulders and neck.

3. Regular Movement and Stretching
Prolonged sitting can lead to muscle stiffness and poor blood circulation. It is recommended to perform simple stretches every 30 minutes:

• Hip stretch: Stand with your hands on your hips and swing your legs back and forth.
• Lower back release: While sitting, clasp your hands behind your head and slowly bend your torso to one side.
• Shoulder opening exercise: Stand with your arms extended backward, palms facing each other, and hold for 10 seconds.

4. Choosing Safe Configurations and Brands

• Configuration priority: An explosion-proof chassis and a Class 4 gas lift are key to safety, effectively reducing the risk of explosion.
• Brand reputation: There have been recalls in the domestic office chair market due to design flaws or manufacturing defects. It is important to choose professional brands with independent design and production capabilities and avoid purchasing “three-no” products (no brand, no factory, no certification).