Waterproof structure of connecting portion

摘要

A waterproof structure includes a first member (front cover) having an elastically-deformable projection at one end and a second member (rear cover) having a contact surface capable of contacting outer and inner surfaces of the projection. When the first and second members are coupled to each other, the projection is depressed on the contact surface and deformed elastically. A contact portion of the projection and the contact surface forms a waterproof region to render a coupling portion of the first and second covers waterproof. Thus, no waterproof elastic member (packing) is required and accordingly no assembly step thereof is required.