| 摘要 |
PROBLEM TO BE SOLVED: To surely cool a mounted heat generating electronic component and to improve reliability and economy by improving air fluidity and air cooling efficiency in the fin of a heat sink. SOLUTION: In the cooling structure of an electronic unit, which circulates cooling air in a heat sink 4 and cools a heat generating part, an air guiding cover 18 where both end parts are bent in directions opposite from fins is fitted to the tips of fins 8 in the heat sink, and cooling air flowing in from one end of the air guiding cover is concentrated to a fin groove by the air guiding cover and it flows out from the other end of the air guiding cover through the fin groove.
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