| 摘要 |
<p>PURPOSE:To prevent the occurrence of problems such as deterioration of operability and the damage of a touch panel by informing an operator of the simultaneous depression of plural keys by means of a warning sound generation function and an identification display function when the operator simultaneously depresses plural keys. CONSTITUTION:When the operator simultaneously depresses plural keys, a plural keys processing means 72 displays the warning sound generation function and the identification display function through a buzzer 15 and the display part 300 of a display device and informs the operator of the effect. Thus, the operator is prevented from recognizing that the invalidity of depression due to the simultaneous depression of plural keys to be the invalidity of depression due to the lack of depression force. Thus, the occurrence of the problems such as the deterioration of operability and the damage of the touch panel 21 owing to the depression of the touch panel by storing force more than necessity can be prevented.</p> |
