| 摘要 |
<p>A crash helmet of a flush-recessed visor type having a tilting chin rest-visor front portion comprises a movable chin rest-visor assembly (2) , flush with the helmet cap (1) , and having, at end portions thereof, substantially circular sector elements (3) , which are firmly anchored to the helmet cap (1) , where the helmet cap (1) is in turn so contoured as to receive restraining, spreading, sliding and locking elements, adapted to be displaced along substantially circular path patterns, and the ideal rotary center (2a, 2ab, 2ac) of which are arranged inside the user ear covering region.</p> |
