Patent ID: 8632139

Claim:
An electric control device comprising: an accommodation element as a casing having an opening and a bottom; a cover element for covering the opening of the accommodation element so that an accommodation space is formed between the cover element and the accommodation element; a connection element for fixing the cover element to the accommodation element; an extending protrusion formed on the cover element or the accommodation element in such a manner that the extending protrusion extends and protrudes to an outside from a contact portion between the cover element and a periphery around the opening; and a control element formed in the accommodation space, wherein the extending protrusion includes a protrusion portion, which extends from an outer periphery of the accommodation element or the cover element, and which protrudes toward a bottom side or a cover element side and is formed to cover the contact portion, wherein a clearance having a predetermined dimension is formed between the protrusion portion and one of an outer wall of the cover element and an outer wall of the accommodation element, which is near the contact portion, wherein the accommodation element and the cover element are formed to have a rectangular shape, wherein the extending protrusion includes a first extending protrusion formed to face a corner of an outer periphery of the accommodation element or the cover element and a second extending protrusion formed to face a side of the outer periphery of the accommodation element or the cover element, the side connecting between two adjacent corners, and wherein the first extending protrusion is formed to protrude to an outside from the second extending protrusion, such that a protrusion amount of the first extending protrusion is larger than the second extending protrusion.