| 摘要 |
PROBLEM TO BE SOLVED: To prevent the price of a mother board from increasing without lowering the cooling efficiency of a daughter board. SOLUTION: A cooling air inlet 6 is provided on the front side and when a daughter board 4 is inserted horizontally from the front side of a housing 5 having an air outlet 7 on the back face side, the horizontal mount connector 1 of the daughter board 4 is fitted in the horizontal mount connector 2 of a mother board 3. Consequently, the wiring containing rate in the mother board 3 is prevented from lowering and cooling air can be fed uniformly to the daughter board 4 by passing the cooling air from the cooling air inlet 6 along the daughter board 4 and discharging it from the air outlet 7.
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