AIR BAG DEVICE FOR KNEE PROTECTION

摘要

An air bag device (S1) for knee protection, comprising a foldably stored air bag (40) projected from a projection opening in a storage portion to a vehicle rear side and developingly expanded upward when gas for expansion flows therein and disposed forward of the knees of an occupant between a body side and the occupant, the air bag (40) further comprising an occupant side wall part (41) and a body side wall part (42), wherein the lower end (48) side of the air bag in the state of the wall parts (41, 42) overlapped with each other and developed in a flat is used as an upstream side portion for the gas for expansion, and the air bag (40) is folded at the beginning of folding so that an upper end (47) side is moved close to a lower end side (48) side from the state of the occupant side wall part (41) and the body side wall part (42) overlapped with each other and developed in the flat, and then folded and stored so that the lateral width dimension thereof is reduced, whereby the air bag (40) of the air bag device (S1) for knee protection can accurately protect the knees of the occupant by efficiently developingly expanding from the start to the completion of the developing expansion.