| 摘要 |
PURPOSE:To certainly prevent forgetting the return operation of a direction indicator by operating an alarming means when meeting the required conditions preset according to the running distance or running hour of a vehicle after a winker switch is turned on. CONSTITUTION:When a car is turned to the right by turning on a winker switch W.SW, say, to the right side (R), a transistor Q1 is turned off and the potential at the part c is turned to L level, and then a counter CNT is set, thereby starting the count of pulses transmitted per unit running distance from a distance detector including a lead switch L.SW. At the same time, a piezo-electric buzzer BZ is operated at a constant frequency corresponding to the preset time of a timer T and informs a driver that the direction indicator is operating now. Thereafter, when the counter CNT reaches the preset value corresponding to a specified running distance L, the output is turned to H level and Q4 is turned on, thereby sounding the buzzer BZ irrespective of the timer TM and reminding the driver of returning the winker switch W.SW. |
