Container for electronic devices having a plurality of circuit boards

A container for containing an electric device comprising:

• a frame having a first opening and a second opening at two end surfaces thereof and opposing each other;
• a metal bottom plate for closing said first opening;
• a metal closure lid for closing said second opening;
• whereby a closed space is formed by said frame, said metal bottom plate, and said metal closure lid and provided inside said container;
• a first circuit means which is brought into contact with a surface of said metal bottom plate so that said metal bottom plate serves as a heat sink for said first circuit means;
• a first electrode means provided to enable establishment of an electrical connection between said first circuit means and external portions of said container, said electrical connection being inside said closed space;
• and
• a metal reinforcing plate provided inside said closed space and between said metal bottom plate and said metal closure lid, and bridging between at least two mutually opposing inner surfaces of said frame at a position formed between said first circuit means and said metal closure lid.