Airbag

• US 8,651,513 B2
• Filed: 02/02/2011
• Issued: 02/18/2014
• Est. Priority Date: 02/17/2010
• Status: Active Grant

• Current Assignee: Autoliv AB (Autoliv Incorporated)
• Original Assignee: Autoliv AB (Autoliv Incorporated)
• Inventors: Okamoto, Masakazu, Hanawa, Akifumi, Ohshima, Takashi
• Primary Examiner(s): ENGLISH, JAMES A
• Application Number:
  US13/579,803
• Publication Number:
  US 20120313358A1
• Time in Patent Office: 1,112 Days
• Field of Search: 280/728.2, 280/730.1, 280/740
• US Class Current: 280/728.2
• CPC Class Codes: B60R 21/206 in the lower part of dashboards, e.g. for protecting the knees
• CPC Class Codes: B60R 21/2171 specially adapted for elongated cylindrical or bottle-like inflators with a symmetry axis perpendicular to the main direction of bag deployment, e.g. extruded reaction canisters B60R21/2176 takes precedence
• CPC Class Codes: B60R 21/2346 Soft diffusers
• CPC Class Codes: B60R 21/237 characterised by the way they are folded

Abstract

An airbag having a cushion part defining an insertion hole that is positioned between first and second sewing lines provided to a base fabric and that is provided for the insertion of the inflator from an outside to an inside. A diffuser positioned within the cushion part and in which the inflator is inserted from the insertion hole. The diffuser has a tubular portion with a portion formed by folding layers of fabrics and being sewn to the base fabric along the first sewing line. The diffuser fabric of the tubular portion on a side adjacent to the base fabric being additionally sewn to the base fabric along a second sewing line. The diffuser includes a guide member 1 that extends and covers the insertion hole with a surface that continues from an inner surface of the diffuser. The guide member being sewn to the base fabric along the first sewing line.

Claims

1. An airbag internally housing a cylinder-type inflator, comprising:

a cushion part;

an insertion hole defined in the cushion part and configured for inserting of the inflator from an outside to an inside of the airbag;

a diffuser which forms a semi-closed space by substantially including an opening; and

a guide member extending over and covering at least a portion of the insertion hole and configured to guide the inflator into the semi-closed space upon inserting of the inflator in through the insertion hole.

2. The airbag according to claim 1, wherein the guide member is coupled to an edge of the opening of the diffuser so as to be capable of guiding the inflator substantially continuously from the insertion hole to the opening.

3. The airbag according to claim 1, wherein the guide member substantially overlaps the insertion hole so as to be capable of guiding the inflator substantially continuously from the insertion hole to the opening of the diffuser.

4. An airbag internally housing a cylinder-type inflator, comprising:

a cushion part;

an insertion hole defined in the cushion part and positioned between first and second sewing lines provided to a base fabric of the cushion part and which is configured to enable inserting of the inflator from an outside to an inside; and

a diffuser into which the inflator inserted from the insertion hole is inserted, the diffuser having a tubular shape in which a first portion defined by layers of a folded fabric is sewn to the base fabric along the first sewing line, the fabric of the tubular shape on a side adjacent to the base fabric being additionally sewn to the base fabric along the second sewing line,

wherein the diffuser includes a guide member which extends and covers the insertion hole with a surface that continues from an inner surface of the diffuser, and which is sewn to the base fabric along the first sewing line.

5. The airbag according to claim 4, wherein the folded fabric is one of a plurality of folded fabrics cooperating to define the tubular shape, and the folded fabric located on an innermost side of the tubular shape including the guide member.

6. The airbag according to claim 5, wherein the tubular shape of the diffuser has a rectangular shape in plan view.

7. The airbag according to claim 4, wherein the tubular portion of the diffuser has a trapezoidal shape in plan view.

8. The airbag according to claim 4, wherein the tubular portion of the diffuser has a non-rectangular shape in plan view.