| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an electrical junction box that can enhance the heat radiation efficiency of an electronic unit. <P>SOLUTION: The electrical junction box 1 includes a housing box 2 and a pair of ECUs 3a, 3b housed in the housing box 2. The housing box 2 has a pair of cuts 10a, 10b that penetrate the housing box 2 and communicate with the outside of the housing box 2. The ECUs 3a, 3b have a printed wiring board that generates heat, a case 15, linear projections 16a, 16b, and a waterproof surface 17. The linear projections 16a, 16b are so formed that they protrude from the surface of the case 15, and their planar shape is annular along the planar shape of the cuts 10a, 10b. The waterproof surface 17 is a portion of the surface of the case 15, that is closer to the inner edges of the linear projections 16a, 16b. When the linear projections 16a, 16b are brought into tight contact with the entire inner edges of the cuts 10a, 10b, the waterproof surface 17 clogs the cuts 10a, 10b, and air outside the housing box 2 is applied directly thereto through the cuts 10a, 10b to radiate heat from the ECUs 3a, 3b to outside the housing box 2. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
