| 摘要 |
PURPOSE:To enable to perform a flashing cycle at the time of connection of the titled tractor with a trailer similarly to that when the tractor is alone and to increase the flashing cycle at the time of disconnection of a lamp, by providing an electric current detector detecting that a direction indicating lamp for the trailer is connected also and an interrupting cycle correcting circuit. CONSTITUTION:Direction indication lamps 1 and 1' of a tractor and direction indication lamps 2 and 2' of a trailer are connected through a switch k3, a relay contact point 11a and electric current detecting resistance R1 with a power source 4, and a relay 11 is controlled by a flashing circuit 10. A correction circuit 12 is provided between the flashing circuit 10 and the electric current detecting resistance R1, through which a transistor T3 performs ON-OFF action and the flashing circuit 10 operates in a given cycle at the time of lighting of four lamps under a connecting state of the trailer with the tractor. As the transistor T3 is kept ON when the tractor is alone, a give cycle can be maintained even if a level of the flashing circuit 10 is raised and a quantity of an electric current is reduced. |
