| 摘要 |
<p>Locking device for chin-straps of safety helmets for motorcylists comprising a base (22) for taking a toothed chin-strap (16) provided with a terminal for restraining the chin-strap, an oscillating ratchet (12) provided at the bottom with engagement teeth and a "C"-shaped front profile (17) and a cam-shaped oscillating control lever (18) having a convex arched upper profile (20). <IMAGE></p> |
