| 摘要 |
PROBLEM TO BE SOLVED: To provide a headlight for a bicycle for securing sufficient visibility even when the bicycle travels at high speed or low speed.SOLUTION: The headlight for the bicycle has at least two or more lamp units. The lamp unit includes: a first lamp unit which illuminates a road surface in front of the bicycle when the frequency of electric signals is less than a predetermined value; and a second lamp unit which illuminates the road surface farther than the road surface illuminated by the first lamp unit when the frequency of the electric signals is not less than the predetermined value. Therefore, the headlight for the bicycle changes the road surface to illuminate based on the frequency of the electric signals from a power supply means or a voltage value of voltage in the electric signals from the power supply means. The headlight for the bicycle illuminates an appropriate road surface according to the travel speed of the bicycle so as to secure the sufficient visibility. |
