Patent ID: 8690184

Claim:
A vehicle airbag system, comprising: an airbag module located inside an instrument panel, the airbag module having an airbag accommodated in a case and a gas generator which generates an airbag inflation gas, wherein the vehicle airbag system includes a front support located at a front side of the airbag module and protruding downward from the instrument panel; a back support located at a back side of the airbag module and protruding downward from the instrument panel; and a back plate located on a back side of the case and having a stiffness portion which reduces deformation of the case toward the back side in the event of deployment of the airbag, wherein the case is supported on a steering member extending in a vehicle width direction inside the instrument panel, and is held on the front support, and the back plate is supported on the steering member or the case, and an upper portion of the back plate is held on the back support, an impact absorber, which allows easy deformation when an impact load is applied to the instrument panel from above, is provided at a location lower than the stiffness portion of the back plate, the impact absorber is comprised of a bent portion obtained by bending part of the back plate toward the back side, a lower end portion of a back wall of the case being provided with a plurality of projections which project to the back side, a head of a stud bolt being housed in a depression formed by a corresponding one of the projections, and a shank portion of the stud bolt passing through the corresponding one of the protections, and a lower end portion of the back plate being supported on the back wall of the case with a nut fastened to the stud bolt.