| 摘要 |
PROBLEM TO BE SOLVED: To supply light irradiated from a light source onto a key top as an irradiation object without wasting the light. SOLUTION: A mobile phone 1 includes a key sheet 19, a key top 17 arranged at a position corresponding to a switch 27 in a surface direction of the key top 19, and a base rubber 16 for fixing the key top 17. An emission part 38 of a light guide part 21 is arranged in a backside direction position of the key top 17 inside the base rubber 16 and illuminates the key top 17. COPYRIGHT: (C)2011,JPO&INPIT
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