| 摘要 |
A POSITION GUIDE (54B) IS DISPOSED ADJACENT A MAIN REFLECTOR (54) (HEAD REFLECTOR) AND FORMED SUCH THAT A POSITION WIDTH DIMENSION W 1 OF THE POSITION GUIDE (54B) IS LESS THAN A MAIN WIDTH DIMENSION OF THE MAIN REFLECTOR (54). A POSITION BULB (60) IS DISPOSED IN THE POSITION GUIDE (54B). IN ANOTHER EMBODIMENT, THE POSITION GUIDE (54B) IS GENERALLY TUBULAR AND HAS A FRONT OPENING DISPOSED GENERALLY FORWARDLY OF THE MAIN REFLECTOR (54). |
