| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide ventilation structure fully integrated with a helmet and capable of effectively performing introduction of outdoor air and emission of air in the helmet. SOLUTION: In this ventilation structure of a helmet, cap parts of the helmet main body are caved inward and a vent opening communicating inside.outside is provided at each concave part of the right and left symmetric parts putting a peak part of the helmet main body B between them and a radially separated parts from the center, and each opened base 3 having a communication hole communicating the vent opening is engaged and fixed on the concave part, then a shutter 4 longitudinally extended and a center part side is supported and vertically swinging is fitted in the each base 3. Then, vertically movable radial side edge of the shutter is placed so as to almost cross to the direction of air flow along outer surface of the helmet.</p> |
