How to use Constant Force Spring

Constant force spring is a mechanical device that creates constant and uniform tension or force along its length. It is typically made of rolled metal strips or flat springs, which are pre-stressed into a tightly wound roll. As the spring uncoils or extends, it generates a constant force over a linear distance.

Constant force springs have several applications such as for cable and wire management, retractable seat belts, mechanical toys, medical devices, automotive components, and many others. One of the most common applications for constant force springs is cable management, where they are used to manage long lengths of flexible materials such as wires and cables. When formed into a spool, the spring can provide a consistent force to the material, ensuring that it is properly wound and managed.

Constant force springs are available in a variety of shapes, sizes and materials depending on the specific application. The performance of a constant force spring is determined by various factors such as spring length, spring thickness, spring width, number of turns, and the modulus of elasticity of the material from which the spring is made.

Here are the general steps for how to use a constant force spring:

Determine the appropriate spring length: Measure the length over which you want to create a constant force and choose a constant force spring length that suits your requirement.

Preparing the constant force spring: In many cases, constant force springs are coiled around a central axis and delivered to the user. In order to prepare the spring for use, it may be necessary to unwind it from the delivery spool and unwind it.

Attach the constant froce spring: To attach the spring to the object, select a suitable attachment point and tie or clamp the spring to it.

Apply tension: Apply tension or force to the object in a direction that pulls on the constant force spring. The spring should begin to uncoil, creating a constant force that will be applied across the entire length of the spring.

Depending on the application, the constant force spring might be left in a fixed position or allowed to travel as the object moves. In either case, the spring will continue to generate a constant force or tension, ensuring proper management of the object.

Please note that the specifics of using a constant force spring will vary depending on the particular application and the type of spring used. It is always best to consult the manufacturer's instructions or seek professional advice when unsure of how to properly use a constant force spring.