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Folded airbag and airbag device

  • US 7,445,239 B2
  • Filed: 09/09/2005
  • Issued: 11/04/2008
  • Est. Priority Date: 09/10/2004
  • Status: Expired due to Fees
First Claim
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1. An airbag, folded and mounted in a steering wheel, wherein:

  • the airbag is folded along a plurality of vertical folding lines and horizontal folding lines that extend in a vertical direction and a horizontal direction, respectively, of the steering wheel in an inflated state, andwherein the airbag is substantially circular in an unfolded state, and a final folded shape of the airbag is obtained by folding the circular airbag a plurality of times along the vertical folding lines into a band-shaped folded body that extends vertically, and then folding an upper portion and a lower portion of the band-shaped folded body along the horizontal folding lines, andwherein the band-shaped folded body is obtained by;

    folding a first half portion of the unfolded airbag in the horizontal direction onto a second half portion -along a first vertical folding line positioned in the first half portion so as to obtain a primary folded body;

    folding the first half portion and the second half portion in the primary folded body along a second vertical folding line positioned in the second half portion so as to obtain a secondary folded body;

    folding the second half portion in the secondary folded body along a third vertical folding line that substantially coincides with the first vertical folding line to obtain a tertiary folded body; and

    folding the second half portion in the tertiary folded body along a fourth vertical folding line that substantially coincides with the second vertical folding line and folding the first half portion in the tertiary folded body along a fifth vertical folding line that substantially coincides with the first vertical folding line.

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