Personal protection device for fixing on the underside of a rail vehicle

An airbag module for fixing on an underside of a rail vehicle between the rail vehicle and a track, the airbag module comprising:

• a bracket for fixing the airbag module on the underside of the rail vehicle;
• a support flap with a front end and a rear end, wherein the rear end of the support flap is pivotably mounted by a first pivot bearing, wherein the airbag module is convertible from a closed state into an open state by pivoting the support flap, and the front end of the support flap thereby being movable toward the track;
• a guide element with a front end and a rear end, wherein the front end of the guide element is pivotably mounted by a second pivot bearing and, in an open state of the airbag module, the rear end of the guide element is pivoted toward the track;
• a third pivot bearing, which moveably connects the support flap and the guide element to each other;
• and
• an airbag, fixed on at least one of the support flap and the bracket, the airbag being folded in the closed state of the airbag module and unfolded in the open state of the airbag module, and the airbag projecting past the front end of the support flap in the unfolded state so that the unfolded airbag and the support flap together form an impact protection for a person on the track,
• wherein a pivot bearing, selected from the group consisting of the first pivot bearing, the second pivot bearing, and the third pivot bearing, is a displaceable pivot bearing.