| 摘要 |
In accordance with one aspect of this invention, provided in the cap body of a helmet is an air exhaust passage, the foremost end of which is near the upper end of the inner surface of a shield plate and, in accordance with another aspect of this invention, both an air exhaust passage and an air supply passage are provided in the cap body of a helmet and both can open and close with a common shutter. According to this helmet, a draft necessary for the defogging of the inner surface of the shield plate, the ventilation of the inside of the cap body and so forth can be effectively produced despite its simple structure.
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