Side airbag device for vehicle

• US 8,662,529 B2
• Filed: 03/17/2010
• Issued: 03/04/2014
• Est. Priority Date: 05/11/2009
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Yamamoto, Kazuhito
• Primary Examiner(s): Dickson, Paul N
• Assistant Examiner(s): Coker, Robert A
• Application Number:
  US13/318,432
• Publication Number:
  US 20120056410A1
• Time in Patent Office: 1,448 Days
• Field of Search: 280/729, 280/730.1, 280/730.2
• 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 21/2171 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 21/23138 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
• CPC Class Codes: B60R 21/239 characterised by their venting means
• CPC Class Codes: B60R 21/26 characterised by the inflation fluid source or means to control inflation fluid flow arrangement or mounting thereof to the vehicle B60R21/20; blasting cartridges for producing gas under pressure in general F42B3/04; initiators or igniters therefor F42B3/10
• CPC Class Codes: B60R 21/261 with means other than bag structure to diffuse or guide inflation fluid

Abstract

A side airbag having a high pressure chamber and a low pressure chamber divided by a sewn portion, a diffuser that distributes gas for inflation to the high pressure chamber and the low pressure chamber, and a check valve that regulates flowing of gas from a high pressure chamber side to a low pressure chamber side. A partitioning wall, that divides a lower chamber (high pressure chamber) and an upper chamber (low pressure chamber) within a side airbag, is structured by a portion of a lower base cloth (high pressure chamber base cloth) that structures the lower chamber or a portion of an upper base cloth (low pressure chamber base cloth) that structures the upper chamber. A check valve, that permits flowing of gas, jetted-out from a gas jetting-out portion of an inflator, from the upper chamber to the lower chamber and that regulates flowing of gas in an opposite direction, is provided integrally with the partitioning wall.

Claims

1. A side airbag device for a vehicle, comprising:

a side airbag having a high pressure chamber that becomes a high pressure side at a time of inflation and deployment, and a low pressure chamber that becomes a lower pressure than the high pressure chamber, the high pressure chamber and the low pressure chamber each inflating and deploying at a time of a side collision;

a partitioning wall that is formed by an end portion of an outer base cloth that is positioned at a seat transverse direction outer side of a vehicle seat, and an end portion of an inner base cloth that is positioned at a seat transverse direction inner side, the end portion of the outer base cloth and the end portion of the inner base cloth being part of either a high pressure chamber base cloth or a low pressure chamber base cloth, the end portion of the outer base cloth and the end portion of the inner base cloth being sewn together, the partitioning wall dividing the high pressure chamber and the low pressure chamber;

an inflator that, at a time of a side collision, jets-out gas for inflation from a gas jetting-out portion, and supplies gas to an interior of the side airbag; and

a check valve that is provided integrally with the partitioning wall, and that is formed by at least one of the outer base cloth or the inner base cloth extending toward a high pressure chamber side, at a seat rear side within the side airbag, and that permits flowing of gas, jetted-out from the gas jetting-out portion of the inflator, from the low pressure chamber to the high pressure chamber, and that regulates flowing of gas in an opposite direction.

2. The side airbag device for a vehicle of claim 1, wherein a diffuser that distributes gas, jetted-out from the gas jetting-out portion of the inflator, mainly to a high pressure chamber side, and that distributes the gas also to a low pressure chamber side, is provided integrally with the partitioning wall.

3. The side airbag device for a vehicle of claim 2, wherein coating for increasing air-tightness is carried out on an inner surface of the high pressure chamber base cloth.

4. The side airbag device for a vehicle of claim 1, wherein coating for increasing air-tightness is carried out on an inner surface of the high pressure chamber base cloth.

5. A side airbag device for a vehicle, comprising:

a side airbag having a high pressure chamber that becomes a high pressure side at a time of inflation and deployment, and a low pressure chamber that becomes a lower pressure than the high pressure chamber, the high pressure chamber and the low pressure chamber each inflating and deploying at a time of a side collision;

a partitioning wall that is formed by an end portion of a high pressure chamber base cloth, the end portion is positioned at a low pressure chamber side of a high pressure chamber outer base cloth, the high pressure chamber outer base cloth is positioned at a seat transverse direction outer side of a vehicle seat, the end portion of the high pressure chamber base cloth being sewn to a high pressure chamber inner base cloth that is part of the high pressure chamber base cloth, the high pressure chamber inner base cloth being positioned at a seat transverse direction inner side, the partitioning wall dividing the high pressure chamber and the low pressure chamber;

an inflator that, at a time of a side collision, jets-out gas for inflation from a gas jetting-out portion, and supplies gas to an interior of the side airbag; and

a check valve that is provided integrally with the partitioning wall, and that is formed by an extending portion toward a low pressure chamber side being provided at an end portion, the end portion is positioned at the low pressure chamber side of the high pressure chamber outer base cloth, the high pressure chamber outer base cloth being positioned at a seat rear side within the side airbag, the extending portion being folded-over toward a high pressure chamber side, and an end edge at a seat front side and an end edge at a seat rear side of the extending portion respectively being sewn to the high pressure chamber inner base cloth of the high pressure chamber base cloth that is positioned at the seat transverse direction inner side, the check valve permitting flowing of gas, jetted-out from the gas jetting-out portion of the inflator, from the low pressure chamber to the high pressure chamber, and regulating flowing of gas in an opposite direction.

6. The side airbag device for a vehicle of claim 5, wherein a diffuser that distributes gas, jetted-out from the gas jetting-out portion of the inflator, mainly to a high pressure chamber side, and that distributes the gas also to a low pressure chamber side, is provided integrally with the partitioning wall.

7. The side airbag device for a vehicle of claim 6, wherein coating for increasing air-tightness is carried out on an inner surface of the high pressure chamber base cloth.

8. The side airbag device for a vehicle of claim 5, wherein coating for increasing air-tightness is carried out on an inner surface of the high pressure chamber base cloth.

9. A side airbag device for a vehicle, comprising:

a side airbag having a high pressure chamber that becomes a high pressure side at a time of inflation and deployment, and a low pressure chamber that becomes a lower pressure than the high pressure chamber, the high pressure chamber and the low pressure chamber each inflating and deploying at a time of a side collision;

a partitioning wall that is formed by an end portion of a low pressure chamber base cloth the end portion is positioned at a high pressure chamber side of a low pressure chamber outer base cloth, a low pressure chamber outer base cloth being positioned at a seat transverse direction outer side of a vehicle seat and being sewn to a low pressure chamber inner base cloth that is part of the low pressure chamber base cloth and is positioned at a seat transverse direction inner side, the partitioning wall dividing the high pressure chamber and the low pressure chamber;

an inflator that, at a time of a side collision, jets-out gas for inflation from a gas jetting-out portion, and supplies gas to an interior of the side airbag; and

a check valve that is provided integrally with the partitioning wall, and that is formed by an extending portion toward a high pressure chamber side being provided at an end portion at the high pressure chamber side of the low pressure chamber outer base cloth, the check valve being located at a seat rear side within the side airbag, an end edge at a seat front side and an end edge at a seat rear side of the extending portion respectively being sewn to a high pressure chamber inner base cloth that is part of the high pressure chamber base cloth, the high pressure chamber base cloth is positioned at the seat transverse direction inner side, the check valve permitting flowing of gas, jetted-out from the gas jetting-out portion of the inflator, from the low pressure chamber to the high pressure chamber, and regulating flowing of gas in an opposite direction.

10. The side airbag device for a vehicle of claim 9, wherein a diffuser that distributes gas, jetted-out from the gas jetting-out portion of the inflator, mainly to a high pressure chamber side, and that distributes the gas also to a low pressure chamber side, is provided integrally with the partitioning wall.

11. The side airbag device for a vehicle of claim 10, wherein coating for increasing air-tightness is carried out on an inner surface of the high pressure chamber base cloth.

12. The side airbag device for a vehicle of claim 9, wherein coating for increasing air-tightness is carried out on an inner surface of the high pressure chamber base cloth.