| 摘要 |
PURPOSE:To prevent the generation of angular differences between the left and the right optical axis by providing a means for initializing optical axes of two headlights in a change-over circuit which specifically connects 2 drive motors for adjusting optical axis with a power source. CONSTITUTION:A relay RL1 is excited by a comparator COM1 which generates an output when the voltage VD of an optical axis detector VR2 of a headlight 1 is smaller than the voltage VS of an optical axis setting unit VR1 corresponding to the rotation of a knob, etc. and another relay RL2 is excited by another comparator COM2 which generates an output when the voltage VD is larger than the voltage VS by a specified amount, and the relays RL1, RL2 are connected to drive motors ML, MR of the left and right headlights 1. A transistor Q4 of an initializing circuit INT is connected to a movable element S of the setting unit VR1 and a capacitor C1 is connected to an ignition switch SW. Since the movable element S maintains a ground potential for a specified period of time after the switch SW is closed, the left and right headlights 1 are tilted to the lower limits. |
