Knee protection airbag device

摘要

The knee protection airbag device (S 1 ) includes an airbag ( 40 ) which protrudes rearward from a deployment opening of a housing upon inflow of inflation gas, and deploys upward to be located in front of knees of an occupant between a vehicular body and the occupant. The airbag ( 40 ) includes an occupant's side wall ( 41 ) and a vehicular body side wall ( 42 ). Lower end ( 48 ) side of the airbag ( 40 ) as flatly expanded with the walls ( 41 and 42 ) overlaid on each other constitutes an upstream side of inflation gas. The airbag ( 40 ) is firstly folded to bring its upper end ( 47 ) close to its lower end ( 48 ), from flat expanded state in which the occupant's side wall ( 41 ) and the vehicular body side wall ( 42 ) are overlaid on each other. Thereafter, the airbag ( 40 ) is folded to reduce its transverse width, and then is housed in the housing. The airbag ( 40 ) of the knee protection airbag device (S 1 ) is able to deploy effectively from the start to completion of deployment for protecting the knees of the occupant.