| 摘要 |
PROBLEM TO BE SOLVED: To improve heat-dissipation of an electro-magnetic device by efficiently transferring its heat to a metal case wile the temperature inside the meal case is suppressed from rising, by providing a corresponding closing part at a position close to an iron core of an electro-magnetic device of a metal case while a heat-dissipation hole is provided at other part. SOLUTION: A metal case 12 for a substrate 11 comprises a lower side case 31 and an upper side case 32 is formed into a cylinder shape with both ends open. At the upper side case 32, a surface 36 close to an iron core 24 of an electro-magnetic device 25 and a closed part 39 corresponding to one slope part 38 are formed, while a plurality of heat-dissipation holes 40 are provided at a part except for such part as close to the iron core 24 of the electro-magnetic device 25. Related to the heat-dissipation 40, a plurality of heat dissipation holes 40a formed sideways at the surface part 36 and the slope part 38 in the longitudinal direction of the upper side case 32, while heat dissipation holes 40b is so formed in the direction orthogonal to the longitudinal direction of the upper side case 32 as to separate the closed part 39 side and a plurality of heat dissipation holes 40a side. |
