Mahjong Chair and Office Chair Installation

The installation steps for mahjong chairs and office chairs are as follows:

1. Prepare Tools and Components

Before installation, ensure that all components are complete, including small wrenches (No. 1, No. 2, No. 3), screws (No. 3, No. 4, medium, large), washers, chair legs, crossbeams, seat surfaces, backrests, armrests, etc. The screw specifications for different models of mahjong chairs may vary. For example, some models require large screws to secure the backrest, so it is necessary to check the product manual in advance to avoid installation failure due to incorrect screw types.

2. Assemble the Frame

1. Orientation Differentiation: Place the flat side of the frame inward to ensure subsequent installation stability.
2. Bottom Frame Fixation: Use No. 3 screws to initially fix the four screw holes on the side, being careful not to tighten them completely to leave room for subsequent adjustments.
3. Chair Leg and Crossbeam Connection: Install the chair legs and crossbeams sequentially, adopting a step-by-step tightening strategy as well. Once the overall structure begins to take shape, reinforce it uniformly. Pay attention to aligning the components during this step to avoid frame misalignment due to misalignment.

3. Install the Backrest

1. Backrest and Chair Leg Assembly: Select No. 3 and No. 4 screws to secure the backrest to the chair legs. Some models may require large screws to enhance stability.
2. Orientation Calibration: Ensure that the backrest is perpendicular to the seat surface to avoid tilting that affects comfort during use.

4. Install the Seat Surface and Armrests

1. Seat Surface Fixation: Flip the seat surface, align it with the holes on the chair frame, and install it using large screws. Apply even force to prevent deformation of the seat surface.
2. Armrest Installation: If the chair is equipped with armrests, select the corresponding screw specifications according to the manual and ensure that the armrests are tightly connected to the seat surface and backrest.

5. Inspect and Reinforce

1. Simultaneous Installation of Both Sides of the Frame: After completing one side, flip it over and repeat the steps to install the chair leg frame on the other side, maintaining symmetry between both sides.
2. Final Reinforcement: Check that all screws are tightened, with a focus on inspecting the connections between the chair legs and crossbeams, and between the backrest and chair legs to avoid rattling or structural damage during use due to looseness.

Precautions:

• Before assembly, carefully distinguish the orientation of the components, especially ensuring that the flat side of the frame faces inward.
• Tighten the screws step by step and reinforce them uniformly once the overall structure is stable to prevent component misalignment.
• The screw specifications for different models may vary, so always refer to the product manual.