| 摘要 |
PROBLEM TO BE SOLVED: To provide a mechanism capable of confirming the abnormal fact that a push button is depressed long (or abnormality such as long depression of the push button) after the fact. SOLUTION: An operation device 14 includes: a key group 22 comprising a plurality of keys; an input detection part 31 for detecting the key depression; a measuring part 32 for measuring a key depression time when detecting the key depression by the input detection part 31; a memory control part 34 that writes abnormality history information showing the occurrence of the abnormality of the key as a measurement target into a memory 24 when the measured value measured by the measuring part 32 reaches a previously set threshold. COPYRIGHT: (C)2010,JPO&INPIT
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