| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To solve a matter that the overall size of an electric connection box increases because the power conduction passage of the electric connection box must take a shape occupying a wide installation space just like a wide metal plate material as a relatively high current flows, and since the installation space of the power conduction passage increases as the number of branch paths or poles thereof increases, size of a control circuit board also increases correspondingly, and to reduce the size of the electric connection box. <P>SOLUTION: Since a board is divided into a plurality of sections being stacked, size of one board 11, 31 can be reduced and thereby the overall size of an electric connection box can be reduced. When two circuit structures 10 and 30 are stacked, heat generated from a semiconductor switching element 33 in the lower second circuit structure 30 is transmitted to the upper first circuit structure 10 to possibly bring the upper first circuit structure 10 into overheated state. But since a heat insulation plate 20 capable of regulating transmission of heat between the first and second circuit structures 10 and 30 is provided between them, the upper first circuit structure 10 has no risk of overheat. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
