STG Mechanism for Office Chairs

The STG mechanism is an important chassis mechanism in office chairs, regarded as the 'brain' of the entire seat, representing the synchronous tilt-lock function.

Core Features of the STG Mechanism
The core function of the STG mechanism is synchronous tilt-locking, where the seat and back angles change synchronously during tilting, and it supports segmented locking. Users can freely lock the seat state within the tilting angle range (such as 105° for office work, 120° for relaxation, and 135° for napping) to meet different scenario needs. For example, the Aoxing office chair, equipped with an STG large-tilt chassis, enables multi-gear switching, transforming the seat into a recliner instantly, significantly enhancing usage flexibility.

Two Structural Types of the STG Mechanism

1. Ordinary STG Structure: Composed of a crank-slider mechanism and a pressure spring, the spring supports manual adjustment of the tilting force. Users can adjust the spring pressure according to their body weight or usage habits to control the resistance of the seat when leaning back.
2. Self-Weight-Bearing Structure: An improved type of the STG mechanism, it adopts a multi-link + torsion spring design, eliminating the need for manual adjustment of the tilting force. Its advantage lies in the ability of the human body to naturally stay in any position during tilting, with the torsion spring providing a restoring force to prevent difficulties in leaning back or sudden drops due to mismatched force.

Ergonomic Advantages of Synchronous Tilting
The synchronous tilting mechanism optimizes the posture of the human body when leaning back through the linked design of the seat and back angles. When the backrest leans backward, the seat rises synchronously, allowing users to place their feet naturally on the ground, avoiding issues such as poor leg blood circulation or muscle tension caused by feet hanging in the air with traditional seats. Additionally, this design prevents the back clothing from being pulled up by the seat, enhancing usage comfort.

Application Scenarios of the STG Mechanism
The STG mechanism is widely used in mid-to-high-end office chairs, especially suitable for users who need to sit for long periods or frequently switch between work and rest states. Its multi-gear locking function can meet diverse needs such as office work, napping, and lunch breaks, while the self-weight-bearing structure further simplifies operation, making it suitable for user groups pursuing convenience.