| 摘要 |
PURPOSE:To prevent the danger due to the sudden stop of a load, by approximating the operation state of the load to the stop state for every stop operation and stopping the operation of the load by the stop operation at the time when it approaches the stop state most. CONSTITUTION:When an OFF switch 4 is depressed during a high-speed operation, the H signal from the switch 4 is inputted to an inverter I2. The signal inverted to L by the inverter I2 is inputted to a terminal U/D of a counter 5 to indicate the down count. The L output of the inverter I2 becomes H by an inverter I3 and is inputted to a terminal CP through an AND gate G9 to count down contents of the counter 5 by 1. Therefore, output terminals Aout and Bout of the counter 5 become L and H respectively, and a motor M of a wiper is rotated in a low speed. Next, when the switch 4 is depressed during a low- speed operation, contents of the counter 5 is counted down, and terminals Aout and Bout become H and L respectively, and the operation becomes intermittent. Next, when the switch 4 is operated during an intermittent operation, contents of the counter 5 is counted down, and thus, the operation is stopped. |
