Patent ID: 7731227

Claim:
A head protection airbag device, comprising; an airbag folded and housed at the upper edge of windows on the vehicle interior side; and an inflator supplying inflation gas to the airbag, and wherein the upper edge of the airbag is installed on and fixed to the vehicle body, and the airbag is configured to deploy and inflate so as to cover the vehicle interior side of the windows while projecting downward from the position in which the airbag is housed by allowing inflation gas from the inflator to flow therein, wherein the airbag includes an inflating portion which inflates by allowing inflation gas to flow therein, and a non-inflating portion into which the inflation gas does not flow, wherein the inflating portion has plural head protection portions provided at the sides of the seats and aligned in the vehicular front-rear direction, which protect passengers' heads when inflation is completed, wherein the non-inflating portion includes blocking portions extending from the lower edge toward the upper edge of the airbag between the head protection portions and covering the vehicle interior side of the windows at the completion of inflation of the airbag, wherein at a blocking portion a downward movement inhibiting portion is formed which catches the passenger's head and inhibits downward movement of the head when the head moves downward while moving toward the vehicle exterior and touches the blocking portion, at the completion of inflation of the airbag, wherein the blocking portion comprises sheets of flexible material overlapping each other at the vehicle interior side and the vehicle exterior side and mutually connected, and configuring a portion near the upper edge of a vehicle interior member arranged at the vehicle interior to be the downward movement inhibiting portion, wherein the downward movement inhibiting portion is connected at both its front and rear edges to a vehicle exterior member of the blocking portion arranged facing the vehicle exterior, the downward movement inhibiting portion arranged at a position higher than the lower edge of the window but lower than the center of the airbag in the up-down direction when inflation of the airbag is completed, and wherein the upper edge of the downward movement inhibiting portion is made to be a catching edge which can be separated from the side of the vehicle exterior member at the time it catches the head.