When choosing plastic office chair accessories, focus on functional compatibility, material performance, and long-term durability. The core principle is to achieve a balance between stability, comfort, and cost-effectiveness.
Chair Leg Springs: Key components ensuring structural stability.
Function: Connects the chair legs to the chassis, preventing loosening during rotation, directly affecting the overall safety of the chair.
Selection Points: Prioritize thickened spring steel with rust-proof surface treatment (e.g., electroplating or spraying). Precise pipe diameter matching is essential (commonly Φ25mm, Φ30mm); an error exceeding 0.5mm can easily lead to loosening. For high-frequency use, a double-slot design is recommended to improve fatigue resistance.
Chassis Components: The core component determining the seat's dynamic performance
Functions: Controls height adjustment, reclining damping, and seat cushion forward/backward sliding.
Selection Points: Always use TUV-certified gas springs; avoid unmarked or CNC-machined gas springs. The chassis shell is recommended to use a reinforced nylon + metal inlay structure, balancing lightweight design with load-bearing capacity (standard load ≥ 113kg). For dynamic support, an intelligent chassis with adaptive tilt adjustment is optional.
Casters: Affecting Mobility and Floor Protection
Function: Enables seat movement while protecting the floor from scratches.
Selection Considerations:
Carpeted Floors: Choose soft PU wheels (hardness ≤ 85A) to avoid excessive dragging resistance.
Hard Floors (Tile/Wooden Floors): Conductive PP wheels or anti-static PU wheels are recommended to prevent static electricity buildup. For office public areas, silent swivel casters are recommended to reduce rolling noise to below 35dB.
Back Frame: The basic framework providing back support.
Function: Supports the mesh or leather back panel, determining the fit and breathability of the backrest.
Selection Points: Prioritize fiberglass-reinforced PP material, with a bending strength exceeding 80MPa. The curve design should conform to the S-shaped curve of the human spine; mid-to-high-end products may support multi-point adjustment. Pay attention to the compatibility with the mesh tension system to avoid support failure due to frame deformation.
Armrest Support: Affects arm support and operational comfort
Function: Supports the armrest assembly; some models support height/angle adjustment.
Selection Considerations: The adjustment mechanism is recommended to use a combination of metal pivot and engineering plastic shell for improved durability. Adjustable supports should be tested for at least 5000 cycles without loosening. The interface with the armrest pad should be highly standardized for easy replacement and upgrades in the future.