Front-Back Sway of Office Chair

The front-back sway of an office chair can be caused by various factors and requires troubleshooting and resolution based on the specific situation.

1. Gaps in Chair Component Assembly
   Office chairs are connected by multiple components using screws. To ensure the flexibility of functions such as height adjustment and reclining, certain gaps must be left at the connection points and cannot be completely sealed. This design can lead to slight swaying, which is a normal phenomenon and does not require special treatment.

2. Equipped with a Rocking Function
   If the chair is equipped with a rocking function (a design for slight swaying), its structure allows for a certain degree of front-back movement, facilitating relaxation after prolonged sitting. Additionally, the rotating nature of the casters may also create a slight sense of swaying when seated, which falls within the scope of functional design and is not a malfunction.

3. Loose Screws
   If the swaying is significant, it is advisable to first check the fixing screws between the backrest and the base. Prolonged use or frequent adjustments may cause the screws to loosen. In this case, use tools to tighten all connecting screws, especially those at the junctions of the base, chair legs, and backrest.

4. Base Installation Issues
   If the seat tilts forward abnormally, verify whether the base is installed incorrectly. When installed correctly, the lever for adjusting height should be located on the right side of the chair; if it is on the left, it indicates that the base is facing the wrong direction and needs to be removed and reinstalled in the correct position.

5. Chair Component Issues
   Damage or quality issues with core components such as the gas lift or base (e.g., gas lift leakage, base deformation) can also cause swaying. If the chair is within the warranty period and the swaying is caused by non-human factors, contact after-sales service for free replacement of parts; if the warranty has expired, purchase compatible parts for replacement.

6. Chair Leg Issues (for Wooden Chairs)
   Swaying in wooden chairs may be due to one leg being shorter than the others, or issues such as joint wear, changes in temperature and humidity causing screw loosening, wood glue wear, or missing parts. Repair methods include:

• Installing Furniture Nails: Measure the distance from the bottom of the shortest leg to the ground and select furniture nails of the corresponding size to drive into the bottom to compensate for the height difference.
• Re-fixing Chair Legs: Turn the chair upside down, remove the fixing screws, clean off the old glue and sand the joint areas, apply special woodworking glue along the joints and legs, reinstall, and then add weight (e.g., place heavy objects on the seat) for more than 24 hours to ensure the glue cures.