| 摘要 |
PROBLEM TO BE SOLVED: To provide a key switch structure preventing intrusion of water or the like into a membrane sheet, and preventing accumulation of liquid. SOLUTION: A waterproof sheet 118 is arranged on the membrane sheet 116, and a welding hole 118b is formed on the waterproof sheet 118. A through-hole 116g is formed on the membrane sheet 116, and an embossed part 117b of a back plate 117 is inserted into the through-hole 116g. The upper part of the embossed part 117b is covered with the waterproof sheet 118, and welded and sealed by a holder 115. Water drainage grooves 115f for draining accumulated water or the like are formed on the holder 115. COPYRIGHT: (C)2009,JPO&INPIT
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