CIRCUIT STRUCTURE AND ELECTRIC CONNECTION BOX

摘要

PROBLEM TO BE SOLVED: To suppress reduction in heat radiation property.SOLUTION: A circuit structure 20 comprises: a circuit board 21 having a conducting path and on which an electronic component 26 is mounted; a heat radiation member 28 overlapped with the circuit board 21 to radiate heat of the circuit board 21, and that has a protrusion 35 protruded toward a side of the circuit board 21; a spacer 40 arranged between the circuit board 21 and the heat radiation member 28, and penetrated with an insertion hole 41 into which the protrusion 35 is inserted; and a heat transfer part 47 arranged between the circuit board 21 and the protrusion 35 in the insertion hole 41 to propagate the heat of the circuit board 21 to the protrusion 35.SELECTED DRAWING: Figure 4