| 摘要 |
<p>PROBLEM TO BE SOLVED: To turn on an illumination even in a light condition of the daytime by providing a cover to arbitrarily shield the incidence of the light to a light sensor in an lighting system for bicycle which is automatically turned on or turned off by the light sensor. SOLUTION: A light-receiving window 16 to lead the light to a light sensor is formed on a lower side of a head case 7. When the incident light from the light-receiving window 16 is received by the light sensor, and a lamp is not turned on when it is light, or automatically turned on when it is dark. A cover 19 which is turnably and pivotably supported by a rivet 18 is provided in the vicinity of the light-receiving window 16 in the bottom side of the head case 7. The cover 19 is turned to cover the light-receiving window 16 to shield the incidence of the light onto the light sensor. When the light-receiving window 16 is covered by the cover 19, the same condition as the nighttime is realized, and a headlamp 3 can be lit even in the daytime.</p> |
