Patent ID: 7586302

Claim:
A detection device comprising: a substrate; a detection component arranged on the substrate to detect a physical quantity; an outer case including a case body and a cover member fitted in an opening of the case body, the outer case accommodating the substrate and detection component therein such that the substrate is held at a predetermined position in the outer case by the cover member and the case body; wherein the case body includes a support portion protruding from an inner bottom surface of the case body so as to support the substrate; the cover member includes a projecting portion projecting toward the support portion so that the substrate is clamped between the projecting portion and the support portion; the support portion includes a fitting protuberance fitted in a fitting hole provided in the substrate so as to position the substrate on the support portion; the fitting protuberance has a rib protruding from an outer peripheral surface of the fitting protuberance in the radial direction; the projecting portion of the cover member is formed of a material that is elastically or plastically deformed by contact with the substrate; and the rib of the fitting protuberance is formed of a material that is elastically or plastically deformed by contact with an inner peripheral surface of the fitting hole of the substrate.