Patent ID: 7440276

Claim:
A cooling-fan-free system module, comprising: a housing unit including a front case and a rear case assembled together to define a receiving space therebetween, and said rear case being made of a highly heat conducting metal material; a circuit module being received in said receiving space, and including a circuit board, and at least one heat-producing element mounted on and electrically connected to one side of said circuit board facing toward said rear case; and two sides of said rear case facing toward and facing away from said at least one heat-producing element being defined as an inner side and a back side, respectively, of said rear case; and a heat radiating unit including a heat-conducting pad arranged on and raised from the inner side of said rear case corresponding to said at least one heat-producing element, so as to transfer heat produced by said at least one heat-producing element to said rear case, and at least one heat radiating member integrally formed on said back side of said rear case and in the form of radiating fins; and a tightening unit including at least two internally threaded posts, at least two screw fasteners, and at least two elastic elements; each of said internally threaded posts being provided on said inner side of said rear case and located at two opposite sides of said heat-conducting pad; and integrally including a base portion perpendicularly projected from said inner side of said rear case, and a hollow sleeve portion adapted to extend through said circuit board to a front side thereof; said screw fasteners being separately screwed into said hollow sleeve portions; respectively, and said elastic elements being separately fitted around said hollow sleeve portions, respectively, to be located between said screw fasteners and said circuit board.