| 摘要 |
PURPOSE:To make a decelerating and adjusting parts thin and construct the whole device in small size by using a planetary gearing mechanism as a speed reduction mechanism, detaining an upper and a lower aiming screw with a spiral guide groove provided in the ring gear of this planetary gearing mechanism, and allowing them to make advance and retreat. CONSTITUTION:A stay 5 is pulled by a spring 6 toward the decelerating/ adjusting part 2, and a head lamp 10 is held at a certain irradiation angle. If under this condition a motor 1 accommodated in a case 3 is driven, rotation of a sun gear 21 in the decelerating/adjusting part 2 is transmitted to a ring gear 22 through a planet gear 23, and the ring gear 22 is decelerated. A guide groove 24 in contact with an upper and a lower aiming screw 4 shifts with rotation of the ring gear 22, and the point of detention (contacting point) moves (either advances or retreats) to/from the axis. That is, the stay 5 moves to the axis, and the vertical aiming of the head lamp 10 will be made. |
