| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent the optical axis from completely being put out of alignment after adjustment and protect an optical axis adjusting device. SOLUTION: A lamp housing 10 is furnished with a wall 3 in such a way as surrounding a hexagonal head 21 of the operation part of an adjusting screw 2, and a lid 34 is mounted through hinge 35 at the edge of an opening 33 in the wall 3 in such a way as capable of opening and closing. If the lid 34 is press fitted into the opening 33 in the non-opening condition, the hexagonal head 21 is enclosed with the lid 34 and wall 3, it is possible to prevent the head 21 from engagement of a tool 36, collision of anything, or water splashing. In this manner, misalignment of the optical axis after being adjusted completely can be precluded certainly using a simple structure and by a simple operation. Also it is possible to protect an optical axis adjusting device from damage, rusting, etc.</p> |
