Double fold and roll cushions for IC

摘要

An airbag assembly may include an inflatable curtain airbag with a stowed configuration and a deployed configuration. The inflatable curtain may have a first protection zone and a second protection zone that inflates forward or rearward of the first protection zone to provide enhanced protection. The second protection zone may be double-folded against the first protection zone so that, during deployment, the second protection zone pivots to unfold relative to the first protection zone. Attachment features such as tack stitching may be used to secure the folded portions together. The tack stitching may be designed to break during deployment of the airbag such that the first protection zone inflates first, followed by a proximal portion of the second protection zone, and then by a distal portion of the second protection zone.

主权项

1. An airbag assembly for disposition proximate a roof of a vehicle to shield a vehicle occupant from impacting at least one lateral surface of the vehicle, the airbag assembly comprising:
an inflatable curtain airbag having a stowed configuration for disposition proximate the roof of the vehicle and a deployed configuration into which the inflatable curtain airbag deploys downward between the vehicle occupant and the at least one lateral surface of the vehicle, the inflatable curtain airbag comprising:
a first protection zone comprising a first interior chamber and a first non-inflating region;a second protection zone comprising a second interior chamber in fluid communication with the first interior chamber and a second non-inflating region; anda first attachment feature; wherein, in the stowed configuration, the inflatable curtain airbag is folded longitudinally at a first stowed fold line such that the second protection zone overlies a portion of the first protection zone; wherein, in the stowed configuration, the first attachment feature secures the second non-inflating region of the second protection zone to the first non-inflating region of the first protection zone to keep the second protection zone folded rearward until deployment such that, during deployment, the first attachment feature releases the second protection zone to allow the second protection zone to unfold one of forward and rearward of the first protection zone.