Head-protecting airbag apparatus

A head-protecting airbag apparatus adapted to be mounted on a vehicle body structure, along an upper rim of and along a front and rear direction of a window of a vehicle, the apparatus comprising:

• an airbag for deployment over the window, the airbag being folded up in such a manner that a lower rim thereof is brought close to an upper rim thereof, and including a main body, a plurality of mounting portions that are located along an upper rim of the main body and serve for attachment to the vehicle body structure, and a retaining hole that pierces the upper rim of the main body and is located between at least one pair of adjoining mounting portions;
• and
• a case that is made from synthetic resin and has an inverse U-shaped sectional contour opening downwardly, and houses the airbag with the mounting portions of the airbag taken out to an outer circumference of the case such that the case is mounted on the vehicle together with the airbag by fastening of the mounting portions to the vehicle body structure, the case including:
• a retaining projection that protrudes from the outer circumference of the case at a location corresponding to the retaining hole of the airbag and is inserted through the retaining hole for retaining the upper rim of the airbag;
• a pair of openings that are formed in front of and at a rear of the retaining projection in such a manner as to extend toward an outboard direction from an inboard side edge of the case;
• and
• a retaining tongue that is formed between the openings and has a cantilever structure so as to be flexible toward an inner side of the case, wherein a section of the airbag in a vicinity of the retaining hole is placed over an outer circumferential surface of the retaining tongue via the openings in order that the retaining projection is inserted through the retaining hole.