| 摘要 |
PURPOSE: A helmet is provided, which safely endures against an impact applied to a helmet and reduces shock energy delivered to wearer's head. CONSTITUTION: A helmet comprises: a small annular curved surface(11) which is formed into embossment on the top of the helmet body; an annular corrugation frame(14) formed in the outside of the annular curved surface; an annular valley(13) formed between the annular corrugation frame and annular curved surface; a protrusion type annular corrugation frame(14') formed in the body surface(12) of the helmet body; an annular valley(13') formed between the body surface of the helmet body and annular corrugation frame; and a bend spring(17) consisting of a bend annular valley and a bent ring shaped hump. |
