Abstract: An airbag device includes: a case which stores an inflatable airbag, which includes a peripheral wall section around a protruding opening; an airbag cover which covers the protruding opening, and which includes a side wall section connected to the peripheral wall section; and an exposed connection portion which serves as a connection portion between the side wall section and the peripheral wall section. At the exposed connection portion, the peripheral wall section includes an engaging hook, and the side wall section includes an engaging hole. At the peripheral edge of the engaging hole, a first rib capable of covering the tip end section of the engaging hook protrudes so as to have a height dimension nearly equal to or more than a height dimension of the tip end section of the engaging hook which protrudes from the engaging hole.

Abstract: An airbag device includes: a case which stores an inflatable airbag, which includes a peripheral wall section around a protruding opening; an airbag cover which covers the protruding opening, and which includes a side wall section connected to the peripheral wall section; and an exposed connection portion which serves as a connection portion between the side wall section and the peripheral wall section. At the exposed connection portion, the peripheral wall section includes an engaging hook, and the side wall section includes an engaging hole. At the peripheral edge of the engaging hole, a first rib capable of covering the tip end section of the engaging hook protrudes so as to have a height dimension nearly equal to or more than a height dimension of the tip end section of the engaging hook which protrudes from the engaging hole.

Abstract: An airbag device is disposed beneath the lateral surface of a driver's seat backrest facing a front passenger seat, and beneath the lateral surface of a front passenger seat backrest facing a driver's seat. The air bag device has first and second airbags that are inflatable and deployable upon a collision of a vehicle equipped with airbag device. The inflated and deployed first airbag has a depressed portion on its outer side in a vehicle width direction near the shoulder of an occupant, and the second airbag inflates and deploys so as to fill the depressed portion. Upon the collision of the vehicle, when the body size of the occupant is greater than or equal to a predetermined size, only the first airbag inflates and deploys, whereas when the body size is smaller than the predetermined size, the first and second airbags inflate and deploy.

Abstract: An airbag device is disposed beneath the lateral surface of a driver's seat backrest facing a front passenger seat, and beneath the lateral surface of a front passenger seat backrest facing a driver's seat. The air bag device has first and second airbags that are inflatable and deployable upon a collision of a vehicle equipped with airbag device. The inflated and deployed first airbag has a depressed portion on its outer side in a vehicle width direction near the shoulder of an occupant, and the second airbag inflates and deploys so as to fill the depressed portion. Upon the collision of the vehicle, when the body size of the occupant is greater than or equal to a predetermined size, only the first airbag inflates and deploys, whereas when the body size is smaller than the predetermined size, the first and second airbags inflate and deploy.