Patent ID: 7561435
Filing Date: 2009-07-14
Classification: H05K

Abstract:
1. An engine controller comprising: a circuit board for controlling an engine; an aluminum die-cast main case body having an open top for housing the circuit board; and a covering member made of an iron-based metal plate which is preliminarily applied with a surface treatment, the covering member being fixedly clamped to the main case body by a setscrew so as to hermetically close the open top of the main case body; wherein the main case body is provided, at the open top thereof, with a pedestal or groove on which a liquid or jellied water-proofing adhesive is coated or filled, thereby enabling at least a cut surface of an entire outer peripheral edge face of the covering member to be substantially covered by the water-proofing adhesive coated or filled on the pedestal or groove, thus hermetically sealing the interior of the main case body; wherein the liquid or jellied water-proofing adhesive is provided between the pedestal or groove of the main case body and the covering member circumferentially internally of a fixedly clamped portion of the main case body where the covering member is clamped to the main case body by the setscrew, so as to hermetically seal the interior of the main case body, wherein the liquid or jellied water-proofing adhesive is provided also between the pedestal or groove of the main case body and the covering member circumferentially externally of the fixedly clamped portion of the main case body where the covering member is clamped to the main case body by the setscrew, so as to hermetically seal the fixedly clamped portion of the main case body, and wherein the fixedly clamped portion is provided with a female screw portion into which the setscrew is screwed, and the fixedly clamped portion is provided, at a top surface thereof, with a convex portion in order to prevent the water-proofing adhesive from overflowing into the female screw portion.