| 摘要 |
PROBLEM TO BE SOLVED: To provide a case structure of a portable telephone, which uses an Mg alloy allowing improvement of its corrosion resistance and high reliability. SOLUTION: The case structure of the portable telephone 2 having a printed wiring board accommodated therein includes a case 8 made of an Mg alloy and fixed by screw to the printed wiring board, a resin case 12 fixed by a screw to the wiring board for accommodating the wiring board therein by cooperating with the case 8, a plurality of first grounding springs 16 connected at their one ends to a grounding pattern of the wiring board and at the other ends to the alloy case, and a plurality of second grounding springs 18 connected at their one ends to the grounding pattern of the wiring board and at the other ends to a metallized film formed on an inner surface of the resin case. The alloy case is provided on its surface with an electrically-insulating resin coating and a metallic deposited film. COPYRIGHT: (C)2004,JPO
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