| 摘要 |
PURPOSE: A protective helmet with a rainwater inflow prevention ventilation structure is provided to prevent the inflow of water by forming a protrusion on the upper part of a ventilation hole. CONSTITUTION: A protective helmet with a rainwater inflow prevention ventilation structure comprises multiple ventilation openings(10,10') which are radially formed with an interval and comprises a ventilation hole on the outside, and protrusions(20,20') which are open at the lower part. The ventilation opening prevents the back flow of water flowing along the protective helmet. |
