Applied to latch, buckle, and door hinge mechanisms, delivering precise torque through the combination of an L-leg and J-hook for reliable open-and-close return action.

Features an asymmetric design with a single straight leg on one end and a triangular frame leg on the other, combining torque output with structural positioning for precise return and force transmission in complex assembly scenarios.

Applied to hinges and rotational return mechanisms, delivering precise torque output via dual 90° bent straight legs for stable angular control and reliable return action.