| 摘要 |
PURPOSE:To achieve functions to hold and cancel automatic operation of a motor after an ignition switch is off, in addition to a proper function to cause automatic operation of the motor in a single operation, using relatively simple circuit constitution. CONSTITUTION:A motor control circuit includes a motor driving circuit 2 for driving a motor M in a predetermined direction in response to control of switches 11, 16 and a power feed control unit 3 having a delay circuit portion for maintaining the power feed to the motor driving circuit portion only for a predetermined period of time even after an ignition switch is off. The motor driving circuit portion 2 is provided with a self-holding circuit which self-holds the ON control of the switch and the delay circuit portion is provided with a resistance 7 for detecting locking. When locking of the motor is detected a transistor 5 is actuated by the delay circuit portion to open a power feed control relay 4 so as to shut off the power feed to the motor driving circuit portion. |
