PURPOSE: To reduce cost, and improve the reliability of a drive circuit operation by controlling plural electromagnetic switches through one common drive circuit.
CONSTITUTION: For instance, an output portion, composed of respective selection switches 4A, 4B, 4C and switching elements 5A, 5B, 5C, is connected to the respective electromagnet coils 61A, 62B, 63C of three electromagnetic switch 6A, 6B, 6C, and is connected to a closing pulse portion 2 and a holding pulse portion 3. The switches 4A-4C are respectively interlocked mutually. When a certain switch among the switches 6A-6C, for instance, the switch 6A is to be closed, the switch 4A is turned on so as to turn on an operation switch 7. Thereby, a coil current is allowed to flow in the electromagnet coil 61A of the switch 6A via an element 5A, to which a closing pulse or a holding pulse is input from the pulse portions 2 and 3, so as to close the switch 6A.
ISHIKAWA MINORU
TAKEUCHI SHINOBU
