How to Repair the Broken Backrest of an Office Chair
The repair method for the backrest of an office chair should be selected based on the specific damage situation. Common situations and handling methods are as follows:
If the gliding bone block of the backrest of the Sihoo C500 second-generation premium chair is loose and cannot be secured tightly, first locate the position of the rear cover, pry it off from the bottom, then use a tool to remove the 5 screws securing the rear cover, and disassemble the aluminum alloy cup holder for repair. During this process, pay attention to the screw specifications and installation positions to avoid secondary damage due to improper operation.
If the backrest base and the connection position are broken, first use an electric drill to evenly drill a row of small holes on the fracture surface. The hole diameter should be adjusted according to the size of the fracture surface, usually 2-3 millimeters. Fill the fracture surface with correction fluid, merge the plastic parts, and then replicate the hole positions on the other fracture surface. When making a strong adhesive, melt the chopped foam board in gasoline, add baking soda to increase the viscosity, and then add spray paint to match the color with the original component. Dip a rivet into the adhesive and insert it into the small holes, and apply the adhesive all over to fix the fracture surface. To enhance the firmness, you can use graphite rod powder, baking soda, and 502 glue to reinforce the damaged position a second time. Finally, sand it smooth and spray paint to restore the appearance.
If the fracture surface is small or the structure is simple, using a right-angle connecting piece for repair is a more convenient option. Select a right-angle connecting piece that matches the material of the backrest chair and fix it with screws on both sides of the fracture to ensure that the connecting piece completely covers the fracture surface and the screws are tightened until there is no looseness. This method is suitable for backrest chairs made of plastic or metal, with simple operation and low cost.
If the backrest cannot stand upright and the hydraulic system fails, lay the chair on its side and check the transmission components. If the chair's toggle switch is normal but the hydraulic mechanism has fallen off, for the non-standard 10*1 fixing screw, a standard size 10 screw can be used as a replacement. Use a tap to thread the original screw hole or use a wrench to directly insert the standard screw into the original position (the length should be kept at 30 millimeters). If forcing the screw in results in an unqualified fit between the screw, nut, and bolt, thread a nut onto the bolt and adjust the nut position to ensure a tight fit. During installation, pay attention that the screw should not interfere with the range of motion of the hydraulic rod. If there is interference, it can be solved by adding a gasket.
