Patent ID: 6945557

Claim:
A knee protecting airbag device comprising: a folded airbag; and a case that is fixed on a vehicular body in front of the knees of a seated passenger, wherein: the case has a generally rectangular-box shape, an opening is formed on the rear side of the case, the airbag is folded such that an upper edge of the airbag is in proximity to a lower edge of the airbag, said airbag is protruded rearward from said opening and is expanded and inflated upward, when an inflating gas flows in, so that the airbag can be arranged on the front side of the knees of the passenger between a member on the vehicular body and the passenger to protect the knees of said passenger, said airbag is constructed into a flat airbag which is formed by joining the outer peripheral edges of a passenger-side wall portion and a body-side wall portion to each other, said passenger-side wall portion is arranged to face the passenger at the time of inflation completion, said body-side wall portion is arranged on a side of the airbag that faces the vehicular body when the airbag is inflated, said body-side wall portion has a flat shape that is substantially identical to that of said passenger-side wall portion, said airbag is connected to the front side of the case at the body-side wall portion such that a portion of said body-side wall portion is pulled in the forward direction of the vehicle when the airbag is fully inflated, and in a fully inflated state of the airbag, the length of the passenger-side wall portion as measured in a vertical plane from the opening to the upper edge of the airbag is greater than the length of the body-side wall portion as measured in a vertical plane between the opening and the upper edge of the airbag.