| 摘要 |
A crash helmet (1) for sports, such as cycling, in which, to optimise ventilation for the wearer and so minimise the effects of sweating, the crash helmet consists of a supporting cap (2), designed to be worn on the top of a person's head, and an outer cap (3), designed to fit on top of the supporting cap (2) and permanently connected to the latter; the supporting cap (2) has a plurality of first through holes (5-9) in channels which are opposite the inner surface of the outer cap (3); the front of the outer cap (3) has at least second through holes (18, 19, 20) which communicate with a channel in the supporting cap, and with a first hole (5-9) in the supporting cap; the rear zones of the caps (2, 3) together form, at the channels in the supporting cap, an equal number of matching passages (27, 28, 29) which communicate with a corresponding second hole (18, 19, 20) and are open at a rear zone of the crash helmet (1); thus between the supporting cap (2) and the outer cap (3), there is a system of channels with Venturi effect, communicating with the head of the crash helmet wearer.
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