Disassembly of Automatic Office Chair

The disassembly of an automatic office chair requires following standardized steps and paying attention to safety. The specific operations are as follows:

I. Tool Preparation and Safety Protection

1. Basic Tools: Rubber mallet (for knocking loose components), Phillips screwdriver (for removing screws), adjustable wrench (for adjusting metal parts), needle-nose pliers or vise-grip pliers (for gripping small parts).
2. Advanced Tools: Pipe wrench (for dealing with stuck gas cylinders), lubricating oil (such as WD-40 or cooking oil, for rusted parts).
3. Safety Protection: Wear anti-slip gloves to prevent scratches and, if necessary, safety goggles to prevent parts from flying. The operating environment should be open, and the chair should be placed on a stable floor or soft mat to avoid tipping.
4. Key Warning: The gas cylinder contains high-pressure gas inside. Non-professionals should avoid disassembling it as improper operation may lead to explosion or parts flying risks.

II. Core Disassembly Steps (from bottom to top)

1. Separate the Base (Five-Star Foot) from the Gas Cylinder

   • Turn the chair upside down so that the five-star foot with wheels is facing up.
   • Observe the connection point between the center of the base and the gas cylinder (usually a tightly inserted structure).
   • Use a rubber mallet to knock evenly along the metal base or steel ring, avoiding applying force at a single point; at the same time, use your hands or feet to assist in掰 (掰 can be translated as 'prying' or 'twisting' in this context, but for clarity, we can use '掰 as in '掰动' which means 'to move by twisting') the five-star foot to form a combined force of 'knocking and掰 (twisting)', and repeat the operation until separation.

2. Separate the Seat Cushion (Upper Seat) from the Gas Cylinder

   • Remove the Base Plate: Use a Phillips screwdriver to remove the fixing screws of the plastic or metal base plate at the bottom of the seat cushion and take off the base plate.
   • Choose a Separation Method:
     • Knocking Method: Use a rubber mallet to knock on the metal base plate at the connection point between the bottom of the seat cushion and the gas cylinder. Hold the gas cylinder steady with one hand and knock with the other hand (or step on the chair with your foot for support), and loosen the two by vibration.
     • Shaking Method: Raise the gas cylinder to the highest position, hold the seat cushion with one hand, press the lifting lever with the other hand to release the lock, and shake the seat cushion vigorously from side to side at the same time, using inertia for separation.

III. Other Precautions

1. Part Management: The removed screws, buckles, and other small parts should be stored in boxes or bags by category to avoid loss or confusion.
2. Rust Treatment: If the bracket is severely rusted, you can first spray a loosening agent (such as WD-40) for lubrication, and then knocking will be easier.
3. Patient Operation: The components may be tightly connected, and repeated attempts at knocking or shaking are required. Avoid forcing them open due to temporary inability to loosen, which may cause damage.

Tip: If you are not familiar with the gas cylinder or complex structures, it is recommended to contact professional maintenance personnel for handling to ensure safety.