| 摘要 |
PROBLEM TO BE SOLVED: To provide a circuit board housing case capable of assuring airtightness between mating faces of members constituting the circuit board housing case to achieve airtightness of an inside of a housing portion for a circuit board. SOLUTION: A controller box 1 is formed by joining a cover member 2 and a base member 3, and a glow plug control board 10 is arranged inside a housing portion 9. A communicating hole 45 is arranged inside a connector (receptacle 4) on an equipment side which connects a connector (plug) at an end of the glow plug connecting cable, to communicate with an inside of the housing portion 9. The inside of the housing portion 9 is decompressed through the communicating hole 45, and airtightness test is performed. If no airtight leakage is found from a joint, the communicating hole 45 is sealed with a melting part 43 formed by melting a peripheral part 44 of the communicating hole 45 opening by a laser. COPYRIGHT: (C)2011,JPO&INPIT
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