Patent ID: 7673900

Claim:
An airbag device, comprising: an airbag; a first gas source for supplying gas into the airbag; a second gas source for generating gas; a supply hole for spouting gas generated by the second gas source; an extendable member which moves the supply hole from a preventing position to a supplying position by an urging force during a transformation from a compressed state to an extended state thereof; a gas-supply mechanism which includes the supply hole and the extendable member, the gas supply mechanism being switched by the urging force from a preventing state to a supplying state, the supply hole maintaining the preventing state and such that gas generated by the second gas source is prevented from being supplied into the airbag, and the supply hole assuming the supplying state such that gas generated by the second gas source is supplied into the airbag; a holding structure for holding the gas-supply mechanism in the preventing state against the urging force; and a release member connected between the holding structure and the airbag, the release member releasing the preventing state of the gas-supply mechanism maintained by the holding structure when pulled, wherein the gas-supply mechanism assumes the supplying state to supply gas generated by the second gas source into the airbag when the release member is pulled by the airbag; and, wherein the gas-supply mechanism includes a gas tank having a space therein, the gas tank supplied with gas generated by the second gas source, the gas tank communicating with the inside of the airbag when the release member is pulled by the airbag; and, wherein the gas-supply mechanism further includes a container for containing the gas tank, the container having an exhaust hole maintaining communication with the supply hole in the preventing state to exhaust gas from the supply hole, and wherein the supply hole, in the supplying state, is positioned outside of the container.