Patent ID: 7845681
Filing Date: 2010-12-07
Classification: B60R

Abstract:
1. An airbag, including a vent hole and a restriction mechanism for restricting outflow of gas through the vent hole, wherein the vent hole is formed in a surface opposite to an occupant facing surface of the airbag in the inflated state or in a side surface of the airbag in the inflated state, wherein the restriction mechanism comprises: a lid member which is disposed inside the airbag to cover the vent hole; and a tethering member which extends inside the airbag to connect the lid member and said occupant facing surface, wherein when the airbag is inflated, the lid member is prevented from moving to outside of the airbag and is overlaid on said vent hole by the tethering member so that the vent hole is closed or slightly opened, and as an occupant collides with the inflated airbag to depress said occupant facing surface, the lid member is pushed out of the airbag through the vent hole by the inner gas pressure of the airbag so as to open or widely open the vent hole.