| 摘要 |
<p>PURPOSE:To evade the consumption of a built-in battery owing to the errorneous operation of a power supply switch when a device is not used such as when it is carried by providing a power supply control means which sets the operation of the power supply switch to be invalid when a display part case is in a closed state. CONSTITUTION:When the display part case 22 is in the closed state, a display opening/closing switch 13 is switched on, and the input port IN 2 of power supply control CPU 4 is in a '0'-state, the signal state of an output port OUT 1 does not change and the operation of the power switch 12 comes to invalid even if the power supply switch 12 is operated and the input port IN 1 of power supply control CPU 14 changes from '1' to '0'. Thus, inconvenience that the power supply switch 12 is errorneously operated when the device is not used such as when it is carried and the power supply of the battery 11 (built-in battery) in the device is previously consumed after the use and it cannot be used is evaded by constituting the device so that the operation of the power supply switch 12 is made invalid when the display part case 22 is in the closed state.</p> |
