US Patent 9592787 Airbag for knee airbag apparatus

An airbag for a knee airbag apparatus which is rapidly deployed upward between the knees of a passenger and instrument panel includes a front panel; a rear panel coupled to the front panel to form an inflation chamber; and a hinge portion having a thin inflation thickness at a position corresponding to a housing connecting portion, at which the instrument panel is coupled to the housing, when the airbag is inflated.