Curtain bag

• US 8,622,421 B2
• Filed: 11/01/2010
• Issued: 01/07/2014
• Est. Priority Date: 11/30/2009
• Status: Expired due to Fees

• Current Assignee: Sumisho Airbag Systems Co., Ltd. (Sumitomo Corporation)
• Original Assignee: Sumisho Airbag Systems Co., Ltd. (Sumitomo Corporation)
• Inventors: Obara, Kazuyuki, Yoshida, Masatoshi, Kami, Yoshinori
• Primary Examiner(s): BROWN, DREW J
• Application Number:
  US13/512,529
• Publication Number:
  US 20120235391A1
• Time in Patent Office: 1,163 Days
• Field of Search: 280/743.1, 280/730.2, 280/730.1
• US Class Current: 280/730.2
• CPC Class Codes: B60R 2021/23542 Weaving
• CPC Class Codes: B60R 2021/23576 Sewing
• CPC Class Codes: B60R 21/232 Curtain-type airbags deploying mainly in a vertical direction from their top edge
• CPC Class Codes: B60R 21/233 comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other B60R21/232 takes precedence
• CPC Class Codes: B60R 21/2346 Soft diffusers

Abstract

Disclosed is a curtain bag that can obtain a necessary inflated state in a short period of time without applying excessive localized force to a peripheral joining section or an inner joining section, and that is improved in the ability to suppress the ejection of passengers out from a vehicle specifically by a lateral collision. A portion of the curtain bag and/or the peripheral edge is shaped so as to snag the bottom sill of a window, and the inner joining section of the region that contacts the section below the bottom sill of the window is shaped with a plurality of dots and/or given an expandable form across effectively the entire surface and/or given a form that has increased bending stiffness.

Claims

1. A curtain bag in which at least two pieces of fabric are joined to each other at least at a peripheral joining section provided at a peripheral edge, and an inner joining section provided at an inner side of the peripheral joining section,

wherein in order to suppress ejection of an occupant out from a vehicle, a portion of the curtain bag in a width direction of the curtain bag and/or the outer edge is shaped so as to catch a bottom sill of a window over the entire length of the curtain bag in a longitudinal direction of the curtain bag at a time of inflation and deployment, and the inner joining section of a region that contacts a section below the bottom sill of the window is shaped with a plurality of dots,

wherein a maximum width of the curtain hag is 1.1 to 1.5 times as large as a maximum width of a window sill.

2. The curtain bag according to claim 1,

wherein in order to suppress ejection of an occupant out from a vehicle, the curtain bag has a form inflatable substantially across an entire surface of the curtain bag, and thereby, a tensile force at the fabric being increased.

3. The curtain bag according to claim 1,

wherein in order to suppress ejection of an occupant out from a vehicle, a length of a single inner joining section projected in a width direction is 2% to 70% of a maximum width of an inflatable section of the curtain bag, and thereby, a bending stiffness of the curtain bag being increased.