CASE STRUCTURE OF ONBOARD ELECTRONIC APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide an electronic substrate for an onboard electronic apparatus which is excellent in heat radiation characteristics/waterproofness/heat resistance/vibration proofness.

SOLUTION: An electronic substrate 7 is temporarily secured to the annular peripheral wall 6 of a cover 1 of frame retardant resin. A connector connection pin 2 is soldered to the electronic substrate 7. The electronic substrate 7 is sandwiched between a heat-conductive base 8 and the annular peripheral wall 6 and screwed for fixing. A generated heat of a heating component 9 on the electronic substrate 7 is propagated and dispersed in the base 8. The annular peripheral wall 6 is provided with an annular groove 6a in which a sealing material 11 is inserted. The base 8 is provided with an annular protrusion 13 which engages with the annular groove 6a.

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