Patent ID: 8659979

Claim:
A case unit comprising: a module member which holds parts therein; a case member which includes an opening portion and a housing portion receiving the module member through the opening portion and housing the module member; and an inner frame which has a side wall portion and a module insertion opening portion surrounded by the side wall portion and holding the module member, which is arranged in the housing portion of the case member to direct the module insertion opening portion toward the opening portion of the case member and to interpose the side wall portion between an inner peripheral surface of the housing portion of the case member and the module member, which positions the module member within the housing portion of the case member, and which secures the module member to the case member, the inner frame being formed to set an outer diameter thereof to be smaller than a diameter of the inner peripheral surface of the case member, and at least one part of the side wall portion being configured as a spread portion which is spread by the module member so as to make a surface contact with the inner peripheral surface of the case member at an outside surface of the spread portion and to fit the outside surface thereof on the inner peripheral surface of the case member when the inner frame is arranged in the housing portion of the case member and the module member is press-fitted into the module insertion opening portion.