| 摘要 |
PURPOSE:To prevent the illegal power supply or cut by means of a third person with a switch operation in an information processor. CONSTITUTION:A relay 3 is inserted into a power line supplying commercial AC power 1 to a main power circuit 6, and first and second operation switches 8 and 9 are serially connected to the clock terminal CK of a D-type flip flop 12 being the driving circuit of the relay 3. One end of the first switch 8 is grounded, and a connection point between the second switch 9 and the clock terminal CK is pulled up. The relays 3 and 11 and are controlled by the first switch 8 only when the second switch 9 is closed. When it is opened, the state of the relays 3 and 11 is held in spite of the operation of the first switch 8. The second switch 9 is constituted so that it can be covered and a cover body is composed so that it can be locked. |
