| 摘要 |
The helmet (20) includes a shell (22), made of polystyrene, and a rim (24), made of polypropylene and integrally connected to the shell (22). Both the shell (22) and the rim (24) have air ventilation apertures (27, 28). Chin straps (26) integrally depend from the internal face of the shell (22). The shell (22) and the rim (24) are interconnected by cross-sectionally L-shape fingers (30), integral to the rim (24), and complementary cavities (32a), made in the shell peripheral edge (32) and engaged by the fingers (30). The rim apertures (28) are obliquely inclined at the lateral sides thereof, to promote air ventilation around the wearer's head. A set of arcuate metallic wires (38), embedded into the helmet (20) and preferably made of titanium, may also integrally interconnect the shell (22) to the rim (24).
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