| 摘要 |
PURPOSE: A full face helmet having a jaw part capable of opening and shutting is provided to make having a conversation, drinking or smoking possible while wearing the helmet. CONSTITUTION: The full face helmet includes a helmet body(12), a face shield(11) and a jaw part(14) for protecting around the jaw and the mouth part of wearer. The jaw part is opened and shut by being rotated on a pivot(13) connected to the body. An inside connecting part of the helmet body and an outside connecting part of the jaw part are joined together by the pivot and a plurality of projections(12aa) and grooves(14aa) are formed on the contacting face of the connecting parts to prevent opening of the jaw part without external face.
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