General Office Chair Assembly

The assembly steps for a general office chair are as follows:

I. Preliminary Preparation and Part Verification

Before assembly, carefully verify the quantity and types of parts to avoid rework due to missing components. Common parts include: backrest (or integrated with the seat), seat, five-star base, casters (5 pieces), gas lift, butterfly plate, armrests (2 pieces), screws (including Torx screws, etc.), and headrest (included in some models). If parts do not match (e.g., screw specifications are incorrect), contact the merchant promptly for replacements.

II. Step-by-Step Assembly Process

1. Install Casters and Five-Star Base
   Vertically and firmly insert the casters into the slots of the five-star base, ensuring each wheel is fully embedded. Some domestic casters may require significant pressure due to specification variations; if installation is difficult, gently tap the top of the wheel to assist in securing it.

2. Secure Gas Lift
   Invert the assembled five-star base and vertically insert the gas lift into the central hole. If the chair is equipped with a protective cover, fit it over the gas lift before installation to protect the internal structure and enhance aesthetics.

3. Install Armrests
   The bottom of the armrests typically has three positioning holes that need to align with the holes on the sides of the seat. Use long screws (tightened to about 90% of their capacity) to secure them, and add washers to prevent loosening. Install the left and right armrests symmetrically to avoid tilting.

4. Connect Butterfly Plate and Seat
   Center the butterfly plate (base) on the bottom of the seat and secure it with four short screws. Some models may require installing a tray first, then fixing the seat with screws; adjust the order according to the instructions.

5. Assemble Backrest
   If the backrest is separate from the seat, insert the backrest rod with the groove facing upwards into the outer tray hole of the butterfly plate, tighten the nut with a medium screw, and add washers for enhanced stability. Ensure the backrest is installed vertically to avoid tilting that affects usage.

6. Overall Assembly
   Align the butterfly plate at the bottom of the seat with the top of the gas lift and press down firmly to engage them. After completion, gently lift the seat to check for detachment. If loose, readjust the alignment angle between the gas lift and the butterfly plate.

7. Install Headrest and Make Final Adjustments
   Insert the headrest into the reserved hole at the top of the backrest, tighten the screw and gently tap backward to test the tightness. If the headrest wobbles, retighten the screw. Some models require inserting a small screw as a safety measure to prevent parts from detaching.

III. Final Inspection and Testing

After assembly, shake the chair left, right, front, and back to check the stability of all connections. Focus on testing the gas lift's height adjustment function, the smooth rotation of the casters, and the adjustment mechanism of the armrests (if applicable). If abnormal noises or looseness are detected, immediately rework and troubleshoot.

Tip: It is recommended to refer to the instruction manual illustrations during assembly, prioritize handling large components (such as the five-star base and gas lift), and then gradually install smaller parts. For complex structures (such as massage function modules), connect the power cords or secure the footrests in the order specified in the instructions.