A pre-stressed power spring is mounted into a case of retractable dog leash to create a compact power source for retractable dog leashes.  It easily manages the disance between dog and pet owner.

Constant force springs have long extension capability, which ensures smooth linear movement, such as returning and retrieving. The feature is an important part of the design for point of purchase displays.  When the cashier takes out the first pack of cigarettes vendor rack, the constant force of the spring pushes the rest of the cigarette packs ahead in the display rack, pack by pack. 

A Fall Arrestor stops a fall that is in progress through a tie off system. Power spring features retractable function, it is ideal component to apply on gravity dissipater for fall arrestor, which are attached between the harness and an anchoring point.

Cordless shades can easily be lifted, pulled down and positioned at a specific height by using a constant torque spring.

Constant Force Springs provide high force output for tensioning & loading usage, the force propels the nails ahead and out to ensure smooth nailing.

Constant force spring is ideal for carbon brush of motor application, it can increase the life cycle of the brush. 

Especially, vacuum machine and hand dryer, the rotating speed for these devices are very high; therefore, carbon brushes have to take a lot of wear and tear. The pretension of constant force spring is smaller than wire spring; as a result, there are two major advantages. Firstly, the outer diameter of the motor can be decreased. Secondly, a longer carbon brush can be adopted, so that a longer life cycle can be achieved.

Moreover, the other advantage of constant force spring is it can reduce EMI, because of the characteristic of constantly pressing brush against the commutator, which has better performance than the wire spring for electronic panel. 

Constant force spring is ideal for carbon brush of motor application. For example, household appliances, garden tools, handhold electric tool and the kitchen devices. It can increase the life cycle of the brush, the rotating speed for these devices are very high; therefore, carbon brushes have to take a lot of wear and tear. The pretension of constant force spring is smaller than wire spring; as a result, there are two major advantages. Firstly, the outer diameter of the motor can be decreased. Secondly, a longer carbon brush can be adopted, so that a longer life cycle can be achieved.

Moreover, because of the characteristic of constantly pressing brush against the commutator, it can reduce EMI for electronic panel.