Side airbag device

• US 8,613,465 B2
• Filed: 12/28/2009
• Issued: 12/24/2013
• Est. Priority Date: 12/29/2008
• Status: Expired due to Fees

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Inventors: Nozaki, Hiroyuki, Nagai, Makoto
• Primary Examiner(s): FRISBY, KEITH J
• Application Number:
  US13/133,544
• Publication Number:
  US 20110241322A1
• Time in Patent Office: 1,457 Days
• Field of Search: 280/739, 280/729, 280/730.2, 280/742
• US Class Current: 280/730.2
• CPC Class Codes: B60R 2021/23146 seat mounted
• CPC Class Codes: B60R 2021/23324 Inner walls crating separate compartments, e.g. communicating with vents
• CPC Class Codes: B60R 21/23138 specially adapted for side protection B60R21/23184, B60R21/232 take precedence
• 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

Abstract

A side airbag device for a side collision is provided in which a first bag half body (20) on an occupant side and a second bag half body (21) on a door side are formed by sandwiching a third base fabric (19) between a first base fabric (17) on the occupant side and a second base fabric (18) on the door side, and gas supplied from an inflator (22) to the second bag half body (21) is supplied to the first bag half body (20) via a through hole (19a) formed in an end part of the third base fabric (19) that is on the side distant from the inflator (22), and therefore, after the second bag half body (21) is firstly deployed to ensure that there is the minimum necessary occupant restraint performance, the first airbag half body (20) is deployed, thereby sufficiently enhancing occupant restraint performance. When the second airbag half body (21) is deployed, due to the thickness thereof in the vehicle width direction being small, smooth deployment is possible without interfering with the occupant, and subsequently when deployment of the first airbag half body (20) is completed it is possible to protect the occupant effectively by ensuring that the thickness in the vehicle width direction of the entire airbag (16) is sufficient.

Claims

1. A side airbag device comprising an airbag that is disposed in a folded state in an inside part of a vehicle body, and is expanded by gas supplied from an inflator and deployed in a fore-and-aft direction of the vehicle body between a vehicle body inside face and an occupant,

wherein the airbag comprises a first base fabric disposed on the occupant side in a vehicle width direction, a second base fabric disposed on the vehicle body inside face side in the vehicle width direction, a third base fabric sandwiched between the first and second base fabrics, a first bag half body formed from the first base fabric and the third base fabric, a second bag half body formed from the second base fabric and the third base fabric and connected to the inflator, and a through hole that is formed in an end part of the third base fabric on the side distant from the inflator and that provides communication between the first and second bag half bodies;

wherein the second base fabric and the third base fabric are joined via a joining part at a position on the inflator side relative to the through hole, and the joining part is broken by an increase in the internal pressure of the second bag half body due to gas supplied from the inflator; and

,

wherein the joining part is provided by breakable stitching, the breakable stitching being formed in a labyrinth shape such that gas emitted from the inflator cannot immediately reach the through hole.

2. The side airbag device according to claim 1, wherein the airbag has a length dimension extending in the fore and aft direction and a width direction extending transverse to the length dimension, and wherein the breakable stitching extends part way across the airbag in the width direction.

3. The side airbag device according to claim 1, wherein the second bag half body has a first half and a second half, said first half being relatively closer to the through hole and the second half being relatively farther from the through hole, and wherein the joining part is disposed only in said first half of the second bag half body.

4. A side airbag device comprising an airbag that is disposed in a folded state in an inside part of a vehicle body, and is expanded by gas supplied from an inflator and deployed in a fore-and-aft direction of the vehicle body between a vehicle body inside face and an occupant,

wherein the airbag comprises a first base fabric disposed on the occupant side in a vehicle width direction, a second base fabric disposed on the vehicle body inside face side in the vehicle width direction, a third base fabric sandwiched between the first and second base fabrics, a first bag half body formed from the first base fabric and the third base fabric, a second bag half body formed from the second base fabric and the third base fabric and connected to the inflator, and a through hole that is formed in an end part of the third base fabric on the side distant from the inflator and that provides communication between the first and second bag half bodies;

wherein the second base fabric and the third base fabric are joined via a joining part at a position on the inflator side relative to the through hole, and the joining part is broken by an increase in the internal pressure of the second bag half body due to gas supplied from the inflator;

wherein the through hole is closed by a base fabric piece, and closure of the through hole by the base fabric piece is released by deployment of the second bag half body progressing; and

,

wherein the joining part is provided by breakable stitching, the breakable stitching being formed in a labyrinth shape such that gas emitted from the inflator cannot immediately reach the through hole.

5. The side airbag device according to claim 4, wherein the airbag has a length dimension extending in the fore and aft direction and a width direction extending transverse to the length dimension, and wherein the breakable stitching extends part way across the airbag in the width direction.

6. The side airbag device according to claim 4, wherein the second bag half body has a first half and a second half, said first half being relatively closer to the through hole and the second half being relatively farther from the through hole, and wherein the joining part is disposed only in said first half of the second bag half body.