| 摘要 |
PROBLEM TO BE SOLVED: To change the style of use corresponding to the degree of skill in operation. SOLUTION: A plurality of transparent or translucent key switches 8 are provided on one side of a housing part 7 supported openably on a base 9 and transparent or translucent display parts 6 for displaying information such as characters/symbols corresponding to the plurality of key switches 8 are provided on the other side of the housing part 7, when the housing part 7 is positioned in the opening direction to the base 9, the display parts 6 are positioned on the front side of a user and when the housing part 7 is positioned in the closing direction to the base 9, the plural key switches 8 are positioned on the front side of the user.
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