| 摘要 |
PURPOSE:To enable a capacitor to be instantaneously charged and to enhance the response characteristic of intermittent wiper action, by providing a normally closed contact, connected to a battery, in an intermittently driving circuit, formed by a series circuit of resistor and capacitor, so that the capacitor can be charged bypassing the resistor. resistor. CONSTITUTION:When a wiper is placed in a stop position with an intermittent wiper starting switch 14 in the side of a closing position 14a, a capacitor 13a in an intermittent operation circuit 13 is charged to a level of supply power voltage. A device, if the starting switch 14 is switched to the side of a normally open contact side, immediately conducts transistors Tr13f, 13e turning on a relay 12 and driving a wiper motor 10. And if the wiper is actuated closing a normally open contact of a fixed position stop switch 11, an electric charge of the capacitor 13a is discharged to a base of the transistor Tr13f. Next the device, closing a normally closed contact of the stop switch 11 if the wiper comes to a stop position, places the wiper in a stop period with no conduction in the transistor Tr13f, and during this time, the capacitor 13a comes to be again charged.
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