| 摘要 |
<p>PURPOSE: To make an electronic circuit board and an electric junction box small and to radiate heat effectively from an exothermic electronic device, a power transistor or the like. CONSTITUTION: An electronic circuit unit 32, in which an electronic device mounted on an electronic circuit board 19 is joined with a conductive member, is stored in an automobile junction box. Then, a metallic member 14 with high heat conductivity is joined with an exothermic electronic device like a power transistor 17 on the circuit board 19. The other end of the metallic member 14 is joined with a volt 16a for fixing the junction box 11 to a car body to radiate the heat outside from the electronic device through the volt 16a and the metallic member 14.</p> |
