Patent ID: 8459694

Claim:
A gas generating device comprising: a housing which is filled with a gas generating agent generating a gas during combustion; and a squib which is accommodated in the housing to ignite the gas generating agent, wherein the housing includes a metallic housing body which forms an accommodation portion accommodating the gas generating agent, a holder which includes a metallic holder body and a resinous molding portion, the resinous molding portion holds the squib and is formed of a synthetic resin and is interposed between the holder body and the squib, and the holder body has a caulking portion which connects the housing body and the holder to each other, wherein the housing body is formed in a substantially cylindrical shape and includes an annular contact portion coming into contact with an end surface of the holder that faces toward the gas generating agent, the housing body being connected to the holder by the caulking portion while the annular contact portion is pressed toward the holder in the axial direction of the housing body, wherein the squib is integrally molded with the holder to be supported by the holder when the resinous molding portion is molded, wherein the resinous molding portion includes a flange portion which comes into contact with the entire periphery of a surface of the annular contact portion on the side of the holder, wherein the holder body includes a support portion capable of supporting the flange portion pressed while coming into contact with the annular contact portion when the housing body and the holder are connected to each other by the caulking connector, wherein the annular contact portion, the flange portion, and the support portion are disposed in parallel so as to overlap with each other in the axial direction of the housing body; and while the flange of the resinous molding portion is arranged between the annular contact portion and support portion of the holder body, the caulking portion presses against the annular contact portion of the housing body and toward the support portion of the holder body in the axial direction of the housing body and creates air-tightness between the housing body and the holder; wherein the caulking portion extends from the support portion of the holder body, overlaps the annular contact portion in the axial direction of the housing body and substantially covers an entire periphery of an upper surface side of an outer peripheral edge of the annular contact portion, and wherein the support portion has a plate shape with thickness along the axial direction of the housing body, and the thickness of the support portion is larger than a thickness of the flange portion in the axial direction of the housing body.