Head-protective airbag device

摘要

The head-protecting airbag device (M 1 ) includes an airbag ( 12 ) provided with a gas admissive portion ( 13 ) and a non-admissive portion ( 23 ). The gas admissive portion ( 13 ) includes a gas feed passage ( 14 ) for feeding inflation gas G toward both front and rearwards of the vehicle, and a plurality of vertical chambers ( 17 ) juxtaposed along front-rear direction of the vehicle. Each of the vertical chambers ( 17 ) includes a communication port at its upper end for communicating with the gas feed passage ( 14 ). The substantial lengths of a vehicle's outer wall ( 13 b) and an inner wall ( 13 a) of the airbag ( 12 ) are differentiated from each other by a belt ( 31 ) in the periphery ( 19 ) of the communication port ( 18 ). Thus the periphery ( 19 ) of the communication port ( 18 ) guides inflation gas (G) obliquely down and toward the vehicle's exterior (O) when inflation gas (G) flows into the vertical chamber ( 17 ) via the communication port. The head-protecting airbag device (M 1 ) is made compact and improves workability in the mounting work on the vehicle while ensuring downward deployment of the airbag ( 12 ) along the window (W).