Seat belts are embedded power springs into its mechanism. The device allows for flexible retrieval and automatic retraction of a seat belt conveniently to keep passengers both secure and comfortable.

A cup holder embedded into a dashboard is a very helpful when enjoying coffee while driving. A cup holder uses a constant force spring for smooth retrieval and release movement.

Constant force spring as a component is beneficial to the motors. The pretension of the constant force spring is smaller than wire spring. Therefore, adopting constant force spring as a component can increase the length of carbon brush, so that increase the life cycle of the motor. On the other hand, it can decrease the outer diameter of the motor. Moreover, it can reduce the EMI, which is important for the application with many electrical systems.

The fan motor of automotive, the motor of linear actuator for seat adjustment, starter motor, air cooling fun motor and the other motors show in this page are all suitable for adopting constant force spring as a component for better performance.