| 摘要 |
<p>Helmet without chin-strap (11) fitted with a fastening device comprising, either a flexible bead (1) forming a collar around the neck of the user, bound to the shell by flexible elements (18, 2-3) allowing the opening by resilient deformation of the bead and acting as a dampener in case of a shock of the slice of the bead against the neck of the user, or a rigid bead in at least two portions hinged each to a vertical axis carried by an extension of the base of the shell, or a rigid skirt prolonging the base of the shell and formed at least by a semi-skirt sliding in a plane parallel to that of the base of the shell. A system of buckles (26) having the functions of articulation axis, anti-theft device, locking and blocking device is associated to such helmets.</p> |
