| 摘要 |
PROBLEM TO BE SOLVED: To obtain a helmet for outwork or exploration settling problems such as poor ventilation, filling with heat and fear of heatstroke or thermic fever. SOLUTION: This helmet comprises pasting a flexible solar battery (2) around a helmet (1), setting a fan (3) driven by a DC motor and fitted to the top of the head through a cushion (6), ventilating by switching polarity and the direction of rotation with a toggle switch (4).
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