Office Chair Stuck

The issue of an office chair being 'stuck' needs to be addressed based on the specific type of malfunction. Here are common situations and their solutions:

1. Stuck Casters/Wheels (Impaired Movement)

1. Foreign Object Blockage: Check if hair, paper scraps, or threads are tangled in the wheel gaps. Use tweezers or a fine needle to clear them.
2. Wheel Damage: If the rubber wheels are worn, cracked, or broken, replace them with new wheels of the appropriate model (ensure the wheel diameter and axle length match the original ones).
3. Axle Malfunction: Check if the axle screws are loose and tighten them with a screwdriver. If the axle is rusty, spray rust remover and then drip lubricating oil (such as WD-40).
4. Floor Friction: Move the chair to a flat and smooth surface (such as wooden floors or tiles) to avoid increased resistance from carpets or uneven floors.

2. Malfunctioning Height Adjustment (Pneumatic Rod Cannot Adjust Height)

1. Locked Handle/Knob: Check if the bottom adjustment device is accidentally locked. Rotate it counterclockwise to loosen it.
2. Pneumatic Rod Damage: If the internal seals are aged, nitrogen leaks, or the rod is deformed, the entire pneumatic rod needs to be replaced (do not disassemble it yourself; contact the manufacturer or a professional for repair).
3. Cylinder Air Leakage: If the chair cannot be lowered, try dripping machine oil around the air release button at the top of the pneumatic rod. Enhance the seal and then gently press the seat for testing.

3. Inflexible Rotation or Strange Noises (Dry Base Swivel Plate)

Apply an appropriate amount of silicone-based grease or white lithium grease to the swivel plate track. Rotate the seat 10-15 times repeatedly to evenly distribute the lubricant. Avoid using cooking oil or ordinary lubricating oil to prevent dust absorption and increased wear.

4. Stuck Footrest (e.g., Child's Lower Leg Gets Stuck)

1. Do Not Pull Forcefully: Forcible pulling may cause soft tissue congestion and swelling, exacerbating the blockage.
2. Disassembly Rescue: Refer to firefighting methods. Use a screwdriver to disassemble the chair base or footrest structure. Gently rotate the lower leg to adjust the angle and cooperate to open the buckle components.
3. Safety Warning: The gap in the footrest of ordinary office chairs may not comply with children's furniture safety standards (such as GB 28007-2011), posing a risk of leg entrapment. Children should not use it alone.

General Principles: Prioritize clearing foreign objects → Lubricate moving parts → Check core components (such as the pneumatic rod) → Seek professional repair. When dealing with high-pressure components such as pneumatic rods and hydraulic rods, non-professionals should not disassemble them themselves to prevent explosion or leakage risks.