CURTAIN BAG

• US 20120235391A1
• Filed: 11/01/2010
• Published: 09/20/2012
• Est. Priority Date: 11/30/2009
• Status: Active Grant

• Current Assignee: Sumisho Airbag Systems Co., Ltd. (Sumitomo Corporation)
• Original Assignee: Sumisho Airbag Systems Co., Ltd. (Sumitomo Corporation)
• Inventors: Kami, Yoshinori, Obara, Kazuyuki, Yoshida, Masatoshi
• Granted Patent: US 8,622,421 B2
• Time in Patent Office: Days
• 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 and/or the outer edge is shaped so as to catch a bottom sill of a window 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.

2. The curtain bag according to claim 1,

wherein in the curtain bag, a maximum width of the curtain bag is 1.0 to 2.0 times as large as a maximum width of a window sill.

3. The curtain bag according to claim 1,

wherein the curtain bag has only a tab as a vehicle body mounting jig.

6. The curtain bag according to claim 1,

wherein a maximum thickness at a time of inflation in an occupant protection region of the curtain bag is 100 mm to 250 mm.

7. The curtain bag according to claim 1,

wherein at the inner side of the peripheral joining section, a plurality dot-shaped inner joining sections are provided independently from the peripheral joining section and independently from one another.

8. The curtain bag according to claim 7,

wherein the plurality of dot-shaped inner joining sections are provided substantially across an entire surface of an inflatable region.

9. The curtain bag according to claim 7,

wherein a distance between the plurality of dot-shaped inner joining sections is longer in an occupant protection region than in a non-occupant protection region.

10. The curtain bag according to claim 7,

wherein a distance between the plurality of dot-shaped inner joining sections is provided to be larger in a longitudinal direction than in a width direction.

11. The curtain bag according to claim 7,

wherein the distance between the plurality of dot-shaped inner joining sections is provided to be smaller in a longitudinal direction than in a width direction.

12. The curtain bag according to claim 7,

wherein the plurality of dot-shaped inner joining sections are provided in succession substantially in a longitudinal direction.

13. The curtain bag according to claim 7,

wherein the plurality of dot-shaped inner joining sections are 15 or more to 160 or less in number, each having an area of 0.7 cm²/each or more to 20 cm²/each or less, and having shapes of line segments, circles, ellipses, quadrangles, rhombuses, polygons or shapes obtained by partially deforming the line segments, circles, ellipses, quadrangles, rhombuses or polygons.

14. The curtain bag according to claim 1,

wherein in the curtain bag, at least one tab, with an angle formed by a straight line connecting a mounting position of the tab and an occupant collision assumed position and a straight line in a width direction passing through the occupant collision assumed position being 0 degrees to 30 degrees or less, is provided.

4. 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, the curtain bag has a form inflatable substantially across an entire surface of the curtain bag, and thereby, a tensile force of the fabric being increased.

5. 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 length of the 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.