Patent ID: 7843699

Claim:
A circuit device comprising: an element having a pair of projections that are spaced apart from each other by a predetermined interval on an outer peripheral surface of the element; and a base body that has an engagement standing part extending in a standing direction and provided, between the pair of projections, wherein: the engagement standing part has contact surfaces that face in opposite directions; the element is assembled to the base body in a state, where each of the contact surfaces of the engagement standing part is in press-contact with a corresponding one of the pair of projections; the engagement standing part has a first tapered wall part and a second tapered wall part that is provided on a side of the first tapered wall part; the first tapered wall part has a first tapered surface that is angled by a first inclination angle relative to the standing direction of the engagement standing part; the second tapered wall part has a second tapered surface that is angled by a second inclination angle relative to the standing direction; the second inclination angle is smaller than the first inclination angle; one of the pair of projections is in press-contact with at least one of the first tapered surface and the second tapered surface; and the one of the pair of projections is deformed.