| 摘要 |
<p>PURPOSE:To obtain a forward/reverse action controller which can reduce its installing space and improve the operability, by using two buttons having the momentary ON/OFF type function to attain the automatic and stop modes and adding a display part for the working state of an actuator. CONSTITUTION:A transistor Tr1 starts it working with push of a switch SW1, and a power window is actuated. While the base potential of a Tr2 rises up and the Tr2 is turned on. The Tr1 is kept on even after the SW1 is turned off. When the actuation of the Tr is over, an overcurrent which stops the drive of a motor M flows to raise the potential of a detecting resistance R. Thus an operation amplifier OP1 works and the output is lowered down to a ground level. Then the Tr2 is turned off and the Tr1 is also turned off to release a holding state. Both switches SW1 and SW2 are applied at a time and therefore both relays r1 and r2 work at a time. Thus no current flows to the motor M, and the potential of the resistance R is set at O. This reduction of the potential is detected by an operational amplifier OP2 and a holding circuit is released.</p> |
