If you want to know the application of constant force spring, firstly you have to know its definition and characteristics.Constant force spring is a kind of new spring which stiffness is 0 and the tensile force or torque is constant when used.The characteristic is that it can output greater force in smaller space, just need a small start-up, then it can store energy when extend.

The constant force spring has been improving constantly in recent years, it is gradually applied in many fields. Its many advantages are incomparable with other traditional springs . Let’s talk about the applications of constant force spring in real life in next.

1, The application of medical devices: The common medical treatment lifting bed in hospital is one of the applications.
2, The application of the the curtain balancer: Such as the household no magnetic curtain, you just need to pull it slightly, the curtain will expand automatically, when pull it again, the curtain will rollback automatically.
3, The motor brush: such the DC motor brush, wiper motor etc.  As below picture:

4, The retail display (POP): auto pusher, vending machine etc. As below picture: