| 摘要 |
PROBLEM TO BE SOLVED: To enable the color of a marker lamp to be changed manually even when a driving motor has failed or when a motor power supply is disconnected by allowing the manual operation of causing a worm to mesh with and separate from a worm wheel. SOLUTION: A driving motor 13 is held by a holding member 17. The rear end of the holding member 17 is pivotally supported against a rotating shaft 18 in such a way as to freely rotate up and down. The driving motor 13 is locked by a nut member in a position where a worm 11 meshes with a worm wheel 12. To manually change the color of a lamp, the nut member is loosed, the driving motor 13 is lowered, and the worm 11 is separated from the worm wheel 12. Then an oscillating frame 8 is rotated to move a color filter 14 in front of or behind a sealed beam bulb 3. |
