Knee airbag with receiving pockets

A knee airbag includes a front panel, a rear panel and first and second tethers. The first tether is between the panels and defines an outboard chamber. The second tether is between the panels and defines an inboard chamber. The tethers cooperatively define a center chamber. The chambers, in an inflated position, are substantially vertical and parallel. The inboard chamber is thinner than the other chambers. In the inflated position, the tethers respectively define first and second knee-receiving pockets. 种膝部安全气囊包括前面板、后面板以及第和第二拉带。第拉带位于面板之间并限定外侧腔室。第二拉带位于面板之间并限定内侧腔室。拉带共同限定中心腔室。处于充气位置的腔室大体上是垂直的并且是平行的。内侧腔室比其它腔室薄。在充气位置，拉带分别限定第和第二膝部接收凹部。