| 摘要 |
A protective helmet, particularly for sports and work use, comprising a rigid outer shell which itself comprises a front cap ( 2 ) having a concavity able to cover at least the upper part of the cranium, and a rear cap ( 3 ) having a concavity able to cover the rear part of the cranium. Said caps ( 2, 3 ) are mutually movable, the rear cap ( 3 ) being connected to the front cap ( 2 ) in such a manner as to rotate relative to this latter about an axis (A) transverse to the vertical plane of symmetry of the cranium, between a raised position and a lowered position.
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