| 摘要 |
PROBLEM TO BE SOLVED: To simply and easily enable identification of an ID number or the like, in a short time, by making an enormous number of combinations available, using a simple operation. SOLUTION: A mobile phone comprises a pressure sensor 2 as an input means. The pressure sensor 2 is provided with a pressure detecting section 11, so disposed as to be exposed on the surface of a case. The pressure sensor 2 converts the pressure, acting on the pressure detecting section 11 into a pressure signal which is an electrical signal. The pressure sensor 2 does not output an on/off signal as a switch, but rather it outputs a pressure signal corresponding to the pressure. For example, if the pressure detecting section 11 is depressed gradually harder, a pressure signal having a different voltage, current, frequency, or the like is outputted.
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