| 摘要 |
PROBLEM TO BE SOLVED: To easily switch input modes, i.e., the key functions of each key and also to confirm the present key mode. SOLUTION: Key function display plates 14 where the key function display of each key 11a can be confirmed from the outside are provided so as to be able to change its relative positions to key tops 11. A keyboard switching detecting part 50 for detecting the relative positions is provided. A key signal that is outputted by pressing a key 11a down is converted into a key function signal corresponding to the detection signal of the part 50. The key function display that can be confirmed from the outside is switched over into key function display at a relative position according to the change of the relative position.
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