Patent ID: 7036843

Claim:
An airbag device for a vehicle comprising: a bag housing case adapted to be disposed below a rear end of a bonnet in proximity to a bottom portion of a windshield of the vehicle, the bag housing case having an opening and a cover mounted to close the opening, the bag housing case further having defined therein a main housing space and a sub-housing space separated from the main housing space and located adjacent to the cover at one side of the bag housing case; a first airbag housed in a deflated, folded state within the sub-housing space of the bag housing case, for opening the cover of the bag housing case from the one side thereof by an inflating force of the first airbag when inflating; a second airbag housed in a deflated, folded state within the main housing space of the bag housing case, for mitigating an impact on an obstacle by inflation after the cover is opened; a bag pressure release mechanism for opening the inflated second airbag when an internal pressure of the second airbag reaches a predetermined pressure so as to release gas within the second airbag to the outside; an inflator disposed within the second airbag; a gas supply pipe communicating at a first end with the inflator and at a second end with a first end of the first airbag; a gas flow path communicating at a first end with a second end of the first airbag and at a second end with the second airbag; and a gas flow path temporarily closing portion disposed in an intermediate portion of the gas flow path for temporarily closing the gas flow path, the gas flow path temporarily closing portion being broken under internal pressure of the first airbag, when the internal pressure of the first airbag reaches a predetermined value, allowing gas within the first airbag to flow through the gas flow path into the second airbag.