| 摘要 |
<p>The crash helmet has an adjustable chin strap (1) that attaches the helmet by tightening the strap against the wearer's chin. The strap is made in a single piece and one end is permanently fixed to one side of the helmet. The other end is joined to a rubber band (30), reinforced by textile and held by a U-shaped guide (32). The strap is locked by a clip (13) that locks on to a fixed U-shaped piece (9). The clip is freed by pulling on a cord (24) that is joined to a lever (20).</p> |
