Patent ID: 7607690
Filing Date: 2009-10-27
Classification: B60R

Abstract:
1. An airbag comprising: an airbag panel for constituting the airbag; a first vent hole disposed in at least one surface of the airbag panel on a side opposite to a passenger-facing surface and a side surface of the airbag panel when the airbag is inflated; a plurality of second vent holes disposed in the airbag panel adjacent to the first vent hole, said second vent holes having a size smaller than that of the first vent hole, and a constraining device for constraining discharge of gas from the first and second vent holes, the constraining device comprising a lid member arranged outside the airbag panel and connected to the airbag panel at one side thereof at a position close to the first vent hole away from the second vent holes to cover the first and second vent holes, and a plurality of joint members which passes through the second vent holes and an interior of the airbag and connects the lid member and the passenger-facing surface; wherein the first and second vent holes are configured to be closed or opened to a small extent by the lid member superposed on the first and second vent holes and pulled toward the interior of the airbag by the joint members passing through the second vent holes when the airbag is inflated; and the first and second vent holes are configured to be fully opened or opened to a large extent by the lid member being moved apart from the first and second vent holes when the passenger contacts the inflated airbag thereby moving the passenger-facing surface backward.