Patent ID: 6972959

Claim:
A heat dissipation device for dissipating heat produced by: at least one electronic component of an electronic control device, which electronic control device comprises; a circuit board having the at least one electronic component mounted thereon; and a protective case made of resin and defining an interior environment; and an actuator block made of metal and mounted outside of the protective case; and wherein the protective case substantially confines the circuit board within the interior environment; and wherein a heat conduction path is arranged and constructed to conduct the heat generated by the electronic component from the interior environment formed by the protective case to the actuator block, wherein the heat conduction path includes a first heat conductive member and a plurality of second heat conductive members, wherein the first heat conductive member is disposed within the interior environment of the protective case, so that the heat of the electronic component is conducted to the first heat conductive member, wherein the second heat conductive members extend from the interior environment to communicate with the environment outside of the protective case, and wherein each of the second heat conductive members has a first end contacting the first heat conductive member and a second end contacting the actuator block, so that the conduction of heat between the first heat conductive member and the actuator block is made at plural positions.