Patent ID: 8585083
Filing Date: 2013-11-19
Classification: B29C,B29L,B60R

Abstract:
1. A passenger airbag apparatus provided in a vehicle, comprising: a passenger airbag that inflates and restrains a passenger; a retainer that houses said passenger airbag folded in a predetermined form; an inflator that supplies gas to said passenger airbag so that said passenger airbag protrudes from said retainer and inflates in response to a collision to said vehicle; and an airbag cover; wherein: said airbag cover comprises: an airbag cover main body portion that extends facing said passenger and covers said passenger airbag housed in said retainer provided on a side opposite said passenger; and a frame-shaped body provided to said airbag cover main body portion, on a side opposite said passenger; said airbag cover main body portion comprises: a tear line for airbag cover tearing; a plate-shaped opening portion that is divided by said tear line and opens and deploys at said tear line by a pressure imparted by an inflation load of said passenger airbag; a flat portion of a rear surface of said airbag cover main body portion that is opposite to said passenger, and which extends along a region of the rear surface that includes said opening portion; and a plurality of welding auxiliary ribs that protrude from a region of the rear surface of said airbag cover main body portion that is spaced from said flat portion including said opening portion, and which are configured to have flat surfaces thereof with the flat portion and the flat surfaces providing for optimized vibration welding therewith; said frame-shaped body comprises: a tear line for tearing that is provided in a location corresponding to said tear line for airbag cover tearing; a flap portion that is divided by said tear line and tears and deploys at said tear line by the pressure imparted by the inflation load of said passenger airbag; a rib to be welded that is provided at least at said flap portion so as to face said flat portion; and a plurality of auxiliary ribs to be welded that is provided at locations on a flange portion formed on an outer side of said flap portion, respectively corresponding to said plurality of welding auxiliary ribs; and said airbag cover main body portion and said frame-shaped body are joined together by vibration welding wherein vibration is relatively applied in a vibration direction, with said rib to be welded and said flat portion in contact with each other and said auxiliary ribs to be welded and said flat surfaces of said welding auxiliary ribs in contact with each other.