Compared with ordinary springs, constant force springs have the following significant advantages in terms of force characteristics:

High force stability: Ordinary springs follow Hooke's law, meaning their elastic force is proportional to deformation. During the stretching or compression process, the force value changes linearly with the degree of deformation of the spring. For example, when stretching an ordinary coil spring, the longer it is stretched, the greater the force required. Constant force springs can maintain a nearly constant output force over a large stroke range through special structural design (such as a scroll structure). Even if the stretching or contraction length of the spring changes, the force value it provides fluctuates very little. This stable force output characteristic makes constant force springs perform well in application scenarios that require precise force control, such as component positioning in precision instruments and stable force application in medical devices. It can effectively avoid errors and instability caused by changes in force value.

Ability to provide continuous constant tension: Ordinary springs may experience elastic fatigue after reaching a certain degree of deformation, resulting in force attenuation and difficulty in maintaining stable tension. Constant force springs can continue to provide stable tension throughout the entire working stroke. This feature is particularly advantageous in equipment that needs to maintain a fixed tension for an extended period. For example, in a cable retracting device, the constant force spring can ensure that the cable is always subjected to uniform tension, avoiding cable relaxation or excessive tension caused by tension changes, and improving the reliability and safety of equipment operation.

Force output range and adjustment advantages: The force output range of ordinary springs is relatively limited, and their maximum and minimum elastic forces are greatly restricted by the spring material, size, and structure. Adjusting the force value usually requires the replacement of springs of different specifications. Constant force springs can flexibly adjust the output force within a large range by adjusting their own structural parameters (such as the number of coils, material thickness, etc.), and can meet the force requirements under different working conditions without replacing the entire spring assembly. In addition, constant force springs can also be designed with a specific force output curve according to actual application requirements, which offers stronger adaptability compared to the single force change law of ordinary springs.

Ability to overcome the influence of gravity: In some vertical application scenarios, ordinary springs are affected by gravity, and the force output at different positions will change, making it difficult to ensure stable working results. Constant force springs can effectively overcome gravity through their constant force characteristics. In vertical motion or suspension applications, they always provide stable force to ensure that objects can maintain balance or achieve stable motion control at different heights, which is difficult for ordinary springs to achieve.