Design compression spring must be clear, the space of spring, the device can effectively mastered the basic manufacturing conditions of a compression spring, outer diameter, inner diameter, free length.

Activity schedule load: the design of the compression spring, must be a clear understanding to the position of the actuator, and the bearing of the stretch. Set position to understand the required elastic, can decide the material, wire diameter, number of turns.

Environmental factors: spring in different environmental conditions, will be affected by environmental factors, and affect the service life, therefore, the designer must consider the change of environmental temperature and humidity, the temperature effect on the life of the spring is very huge, humidity is easy to make without oxidation surface treatment of the spring. Therefore, environmental factors can decide whether the spring surface treatment and material need to be selected.