| 摘要 |
<p>A crash-helmet (1) has a visor (3) and a mouth-gard (4), rotatably supported on a shell (2) so as to rotate about respective rotational pins (5, 10) which are suitably spaced, travelling along circular trajectories (8, 15) which intersect so as to superimpose a bottom edge (7) of the visor (3) and a top edge (13) of said mouth-gard (4) in a position where both are simultaneously lowered; the visor (3) is provided with first engagement means (6; 36) and the mouth-gard (4) is provided with second engagement means (11; 111), the first and the second engagement means (6; 36, 11; 111) being designed to co-operate, over a predetermined circumference arc of the circular trajectories (8, 15), so that the mouth-gard (4) causes partial raising of the visor (3) when the mouth-gard (4) is lowered. <IMAGE></p> |
