Non-Magnetic Constant Force Spring

Non-Magnetic Constant Force Spring

Non-Magnetic Constant Force Spring is a type of spring that generates an elastic restoring force almost entirely without relying on magnetic materials or magnetic fields. Therefore, it is especially common in devices sensitive to magnetic fields or requiring minimal electromagnetic interference. This makes it valuable for applications demanding high stability and low-noise environments.

It achieves stable and controllable elastic behavior through special materials, geometric design, or pre-stressing, remaining unaffected by external magnetic fields and causing no additional interference to surrounding equipment. Its structure is simple and highly reliable.

Non-Magnetic Constant Force Spring consists of a strip of material formed into a spiral with built-in curvature. When the strip is extended, its inherent stress resists an applied load, similar to a conventional extension spring, but with nearly constant resistance.

In practice, constant force springs are usually mounted on a drum, where the free end bears the applied load. Alternatively, the free end may be fixed, allowing the spring itself to provide the working force, as in electrical devices such as carbon brushes.