Safety helmet with two main features: an emergency device that activates in a fall situation, which gas supplies and inflates a ring-like airbag (6) by means of an exchangeable gas supply to bridge the distance between the helmet lower edge and upper shoulder of the protective helmet wearer, and the detachability of the helmet between the upper helmet shell (1) and the lower airbag element (2) in order to assist possible first responders to support the fallen protective helmet wearer, since the inflated airbag with the airbag element (2) separated from the upper helmet shell (1) forms a neck brace (FIG ).
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