Patent ID: 8714585

Claim:
A knee airbag internally accommodating an inflator, comprising: a cushion section; an insertion hole defined in the cushion section for inserting the inflator from an outside to an inside of the cushion section; and a diffuser located within the cushion section and into which the inflator that has been inserted from the insertion hole is inserted, the diffuser having a tubular portion obtained by folding a hexagonal cloth back along a diagonal of the hexagonal cloth thereby forming substantially congruent and left-right symmetrical trapezoidal cloths by taking the diagonal as an upper base and sewing a portion corresponding to a lower base of the trapezoidal cloths to a foundation cloth of the cushion section, and the inflator being inserted into the tubular portion adjacent to the lower base, wherein the cushion section being folded back at both outer sides along creases that are substantially orthogonal to the longitudinal direction of the diffuser and located longitudinally beyond the lower base of the diffuser.