Stores exceptionally high torsional energy within a compact footprint through its ultra-high-turn closely wound structure, delivering powerful and durably stable angular return force for precision rotational mechanisms.

Integrally combining a rectangular frame, torsion coil, and U-fork hook, the coil torque provides continuous clamping force for the elastic retention of banknotes, ID cards, and name badges.

Combining torsional spring force with a U-fork arm for positioning, the coil drives the U-fork end to clamp or actuate target components for precise elastic gripping and return action.

One end short leg for positioning and one end large rectangular frame arm for force transmission, purpose-built to deliver stable large-contact-area torque output and precise return for latch bolts, shift forks, and clutch mechanisms.

Integrally formed from a single wire into a twin-coil structure, delivering higher torque output than a single-coil spring within the same installation footprint — widely used in furniture hinges and door lock return systems.

One end loop for hook mounting and one end short leg for positional support, delivering stable torque in a compact multi-coil body for latch and consumer product open-close return functions.

The U-shaped rectangular bent arms on both ends snap directly into slots or plates, delivering precise and reliable return torque for latch, clamp, and pedal mechanisms.

With arms extending 180° in opposite directions, the extra-long moment arms and multi-coil energy storage deliver powerful, stable return torque for large-stroke opening and closing mechanisms.

Featuring extra-long dual straight legs with small bent tips, delivering stable torque output in high-moment applications for precise return of pedals, covers, and other heavy-load components.

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.