Diaphragm damper device coiled wave spring and damper system

Provided is a coiled wave spring used for a diaphragm damper device arranged inside a combustion chamber partitioned into a housing and a cover. The coiled wave spring is configured so as to be arranged between the diaphragm damper in the diaphragm damper device and the cover and is also configured such that the diaphragm damper is fixed to the housing by the elastic force of the coiled wave spring. The coiled wave spring has a coil section, a winding-start section, and a winding-end section. The winding-start section and the winding-end section each form a flat seat winding section. The outer diameter of each of the seat winding sections is greater than the outer diameter of the coil section. The coiled wave spring is configured such that one of the seat winding sections is fixed to the diaphragm damper.