Patent ID: 7913794

Claim:
A hood airbag device for use in a vehicle, comprising: an airbag module having an inflator and an airbag that is deployed by a gas supplied from the inflator, the airbag module inserted between an outer hood panel and an inner hood panel of a hood through the inner hood panel, the airbag module installed on a reinforcement and the inner hood panel, the reinforcement connecting the inner hood panel with the outer hood panel and reinforcing the hood; and a door that covers an opening formed in the outer hood panel that is aligned to correspond to the airbag module, the door held in place on a peripheral portion around the opening in such a manner that, when the airbag is inflated, the door is unfolded and opened by an inflating force of the airbag, wherein: the door has a hinge for supporting the door when the door is unfolded; the hinge, which is less rigid than the door, is plastically deformed with ease in response to the unfolding of the door and is provided with a deformable portion as a spare extensible part for securing a deformation stroke thereof; and the hinge is connected to the reinforcement by means of a connector member such that the hinge is relatively displaceable within a predetermined range with respect to the reinforcement.