Patent ID: 7746648

Claim:
A controller including a modular heat-radiation structure, said structure comprising: a printed circuit board; a module which generates heat, including a first main unit having a fixing hole and a lead for connecting to the printed circuit board; a heat-radiation fin, fixed to the top face of the first main unit, for radiating heat generated in the module; a resin-made insulating heat shield inserted between the printed circuit board and the first main unit; and a fixing element which fixes the heat shield, the module, and the heat-radiation fin; wherein: a lead hole for allowing the lead to pass therethrough and a first fixing hole for allowing the fixing element to pass therethrough are provided in the heat shield, and a second fixing hole for allowing the fixing element to pass therethrough is provided in the printed circuit board; wherein said controller comprises: an electric power source as a source for driving the module; and a case, having a mouth for opening the top face of the module, for mounting the printed circuit board, the module, the electric power source, and the heat shield; wherein: the case includes a separator for separating from the electric power source the heat-radiation fin and the module.