| 摘要 |
PURPOSE:To improve the operational efficiency of a turn signal switch by constructing an automatic return mechanism of the turn signal switch by an auto-canceler of an electric means for simplification. CONSTITUTION:A ring-shaped partition wall H1 is projected on the lower face of a steering handle H, and two pairs of a light-emitting element 2a and a light- receiving element 2b arranged to face to each other with the partition wall H1 to be brought between are provided at a fixed expanding angle for constructing a sensor to detect the revolution of the steering handle H. An auto-canceler 2 is constructed of the sensor part and the electric circuit part of a direction-indicating light. For turning, when an operation lever 4a is rotated in a fixed direction, the electric circuit of the auto-canceler 2 is closed to operate the direction- indicating light. After turning, when the handle H is rotated to return, the above-said electric circuit is opened by the signal from the sensor part of the auto-canceler 2 to stop the operation of the direction-indicating light. |
