| 摘要 |
PROBLEM TO BE SOLVED: To make action due to erroneous operation hardly occur in a device, even if an input operation section is erroneously operated, during attachment/detachment of an operation unit whose input operation section is less-visible while it is attached to a body of the device.SOLUTION: If a detection state of an attachment/detachment sensor 7d changes from a mounting state to a mounting part 3a to a separation state during a period from pressing operation of a push-button switch 7b to releasing of the pressing operation, the pressing operation of the push-button switch 7b is disabled. If the detection state of the attachment/detachment sensor 7d changes from the separation state from the mounting part 3a to the mounting state during a period from pressing operation of the push-button switch 7b to releasing of the pressing operation, the pressing operation of the push-button switch 7b is disabled in the same way. On the other hand, if the detection state of the attachment/detachment sensor 7d is unchanged in the mounting state to the mounting part 3a or the separation state during the period from pressing operation of the push-button switch 7b to releasing of the pressing operation, the pressing operation of the push-button switch 7b is enabled. |
