| 摘要 |
PURPOSE:To resupply a commercial power source to an apparatus body at the time of recovering a power source interruption by providing a backup switch which is driven by a backup power source and connected at the time of a power interruption of the commercial power source in parallel with a soft switch. CONSTITUTION:A terminal computer 1 is supplied with power from a direct switching power source 2 of a power source connected to a commercial power source. The power source 2 can control an operation by a control terminal 3, which is connected to a ground through a power source switch 4 to become a hard switch provided in parallel, a soft switch 6 and a backup switch 8. Accordingly, even if a power interruption occurs so that the switch 6 is opened when only the switch 6 is connected, the switch 8 provided in parallel is connected. Thus, the commercial power source is resupplied at the time of recovering the power interruption, and an apparatus can be operated. |
