Safety helmet with improved adjustable napestrap

摘要

The protective helmet (15) is composed of a crown (16) made from plastic material and a semi-rigid neckband (20) adjustable by an adjustment unit (25). The neckband has one end joined to the crown by a sliding mechanical link comprising pins controlled from slides (32,35) able to be moved from the outside in a slit of the crown. The pins are securely attached to the inside wall of crown and molded directly along with the crown and are formed by a rack (30) by two series of notches separated by slit.