| 摘要 |
PURPOSE:To enable desired flasher operation, by releasing the electromagnetic relay if the contact is welded, by compulsively activating the electromagnetic relay through the provision of the switch responding to the power supply current of lamp, in directional indication of an automobile. CONSTITUTION:The power supply circuit of the flasher lamps 3 are 4 aer provided with the operation switch 5, electromagnetic relay 6 having normally open contact 6a and its exciting coil 6b, circuit 12 detecting the application of th switch 5 with the potential of point A on the power supply circuit, oscillator 10 causing switching pulse of a given frequency, gate circuit 13 controlling the power feeding to the coil 6b with passed switching pulses, and switch 8 responsing to the lamp supply current, are provided and the transistor 16 is conductive with the operating output of the switch 8, and as a result, the gate 13 is open and the coil 6b is excited. |
