Metal Plate Under Office Chair
The metal plate under an office chair typically refers to the metal frame or base at the bottom of the seat. While these two components have distinct structures and functions, they both contribute to the chair's stability and user experience.
Base: The Core Functional Component
The base is the key structure connecting the gas lift to the backrest, playing a central role in fixation, adjustment, and functionality.
- Component Connection Hub: The base secures the gas lift (the core component for height adjustment) using bolts or clips, while also connecting the backrest, armrests, and seat cushion to ensure coordinated operation of all parts. Its design must balance strength and flexibility to accommodate users of different body types.
- Recline and Lock Mechanism: Most office chair bases are equipped with tilt adjustment functionality, enabling dynamic adjustment of the recline angle through internal springs or dampers. Specific angles can be locked using knobs or levers to meet users' needs for different postures, from upright sitting to short naps.
- Safety Protection Design: The base must withstand the user's weight and dynamic pressure, so it is made of high-strength steel (such as cold-rolled steel plate) with anti-rust treatment on the surface (such as powder coating or electroplating). Some high-end bases also incorporate explosion-proof devices to prevent the base from detaching in the event of gas lift failure.
Metal Frame: The Structural Support Main Body
The metal frame is the framework structure at the bottom of the seat, directly determining the chair's load-bearing capacity and stability.
- Cross-Beam Design: A typical frame consists of 2-4 horizontal steel beams cross-welded with vertical supports, forming an 'X' or 'ไบ' (Chinese character for 'well') shape. This design evenly distributes pressure, preventing local stress concentration and deformation, and can typically support weights of 100-150kg.
- Lightweight and Strength Balance: To balance portability and durability, frames often use hollow steel tubes (such as round tubes with a diameter of 25mm and a wall thickness of 1.2mm), with optimized cross-sectional shapes (such as elliptical) to enhance bending resistance. Some gaming chairs or chairs designed for heavier users may use solid steel bars to reinforce the structure.
- Anti-Slip and Fixation Functions: Anti-slip pads (made of rubber or silicone) are often installed at the bottom of the frame to reduce noise during chair movement and protect the floor. Additionally, screw holes are pre-drilled on the frame for fixing five-star casters or slide rails.
Maintenance and Purchase Recommendations
During daily use, regularly check if the base bolts are loose and if the metal frame has rust or cracks. When purchasing, pay special attention to the base thickness (recommended โฅ2mm) and the frame's welding quality (no cold welds or burrs) to ensure long-term safety and comfort.
