| 摘要 |
<p>PURPOSE:To ensure the displacement drive of a collimator lens which can form a pattern of illuminating flux with a clear cut-off line. CONSTITUTION:A bulb 6 is secured to a reflector 3 having an elliptical reflecting mirror surface 5 and a collimator lens 1 is provided in front of the bulb 6 and a shade 7 is disposed between the bulb and the lens. The reflector 3 includes a pair of oscillating arms 9R, 9L pivotally provided on the side of a lamp body 2 via a watt type link mechanism 4 whose axis of point symmetry coincides with an optical axis L2. The angle of support of the watt type link mechanism 4 is varied using a displacement drive mechanism 14, which uses a motor 20 as a drive source, so that the optical axis L2 of the reflector 3 is displaced in parallel to the optical axis L2 of the collimator lens 1.</p> |
