Office Chair Reclining Structure
The reclining structure of office chairs mainly involves reclining mechanisms, which can be classified into three major types based on the reclining results: back-reclining mechanisms, seat-reclining mechanisms, and synchronous-reclining mechanisms.
Back-Reclining Mechanism: Its direct result is that the backrest can recline while the seat remains horizontal. This mechanism has certain characteristics in practical use, such as being prone to wearing out clothes. For example, when a man wears a business shirt and tucks it into his pants, the friction generated by the backrest reclining may pull the shirt out. However, some chairs have backrests that can slide up and down, and such chairs do not have the aforementioned problem.
Seat-Reclining Mechanism: It generally features an integrated seat and backrest design and is more common in leather chairs. Its reclining method is similar to a seesaw, with the seat and backrest reclining together while maintaining a constant angle between them. Depending on the connection point between the mechanism and the seat, seat-reclining mechanisms can be further divided into center-mounted and front-mounted types. In a center-mounted mechanism, the force is applied at the center of the seat, causing the buttocks to sink and the knees to rise during reclining. In a front-mounted mechanism, the force is applied at the front of the seat, causing the buttocks to sink while the knees remain relatively flat, similar to a person squatting while standing. Most large leather chairs adopt the front-mounted mechanism.
Synchronous-Reclining Mechanism: Both the seat and backrest can recline, and they shift synchronously. This design closely matches the body's reclining posture and provides better support and fit for the user. High-end ergonomic chairs generally adopt this mechanism. From a mechanical perspective, synchronous-reclining mechanisms are relatively complex. In terms of operation, they can be classified into three types: cable-controlled adjustment, mechanical adjustment, and self-weight adjustment. Cable-controlled adjustment usually involves a lever or button on the armrest that can be easily manipulated with the fingers. Mechanical adjustment requires turning a handle under the seat. Self-weight adjustment relies on the weight of the user pressing down on the seat, with the force being transmitted to the backrest through the mechanism underneath the seat. This design, based on mechanical principles, allows a single chair to accommodate various body types, ensuring comfort for both overweight and underweight individuals as their downward and backward weights essentially cancel each other out. Additionally, reclining locking mechanisms include stepped locking and follow-back locking. Stepped locking typically offers several different angle settings.
