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Head-protecting airbag

  • US 20050121887A1
  • Filed: 11/23/2004
  • Published: 06/09/2005
  • Est. Priority Date: 11/27/2003
  • Status: Active Grant
First Claim
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1. A head-protecting airbag folded and housed in upper edges of side windows and deployable downward when fed with inflation gas, the airbag comprising:

  • an airbag body for covering the side windows upon deployment and a belt, the airbag body including a gas admissive portion, wherein;

    the gas admissive portion inflates by admitting inflation gas between a vehicle'"'"'s inner wall and a vehicle'"'"'s outer wall;

    the gas admissive portion includes an initially inflatable portion located along upper edge of the airbag body and admitting inflation gas in the initial stage of inflation, and a protective portion located below the initially inflatable portion and disposed at side of an occupant'"'"'s head as the airbag is completely inflated;

    the protective portion includes a main cell having a temporary joint, the temporary joint joining the inner wall and the outer wall together, and separating the inner wall and the outer wall when internal pressure of the protective portion rises along with inflation, whereby the main cell is inflated thinly before the separation of the inner wall and outer wall by the temporary joint, and inflated thickly after the separation;

    the belt is located in exterior side of the airbag body, upper end of the belt being connected to the vicinity of upper edge of the airbag body, and lower end of the belt being connected to a position below the initially inflatable portion of the airbag body, whereby the belt pulls a lower part of the airbag body toward exterior of vehicle during deployment; and

    the airbag body is provided;

    in at least part of the initially inflatable portion, with a folded and piled portion formed by folding and piling the inner wall and outer wall on folds together with the belt; and

    , below the folded and piled portion, with a roll-folded portion rolled toward exterior of vehicle from lower edge side, whereby the initially inflatable portion pushes out the protective portion downward when inflated with inflation gas.

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