Airbag device

• US 20040051282A1
• Filed: 08/29/2003
• Published: 03/18/2004
• Est. Priority Date: 08/30/2002
• Status: Active Grant

• Current Assignee: Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Company)
• Original Assignee: Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Company)
• Inventors: Okamoto, Yutaka, Kikuchi, Yuji
• Granted Patent: US 7,021,656 B2
• Time in Patent Office: Days
• US Class Current: 280/732
• CPC Class Codes: B60R 2021/23382 Internal tether means
• CPC Class Codes: B60R 21/2165 characterised by a tear line for defining a deployment opening
• 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 21/2338 Tethers
• CPC Class Codes: B60R 21/239 characterised by their venting means

Abstract

An airbag device has a bag housing case, an airbag housed in the bag housing case, a plate member provided within the airbag, and a bag pressure release mechanism. When the internal pressure of the airbag reaches a predetermined pressure, the bag pressure release mechanism opens the airbag to prevent an increase in the internal pressure of the airbag. The plate member covers the bag pressure release mechanism when the airbag is in a deflated state. When the airbag is inflated, the plate member is released from coverage of the bag pressure release mechanism by an inflating force.

Claims

1. An airbag device comprising:

a bag housing case;

an airbag housed in an deflated, folded state within the bag housing case;

a plate member disposed within and connected to the airbag; and

a bag pressure release mechanism provided in the bag housing case in confronting relation to an inside of the airbag, said mechanism being designed to open the airbag when an internal pressure of the airbag reaches a predetermined pressure after the airbag is inflated, thereby preventing an increase in the internal pressure of the airbag,

the plate member being designed such that it covers the bag pressure release mechanism when the airbag is deflated and is released from coverage of the bag pressure release mechanism by an inflating force of the airbag when the airbag is inflated.

2. An airbag device as set forth in claim 1, wherein the bag housing case has at least one vent hole formed in a bottom thereof.

3. An airbag device as set forth in claim 2, wherein the plate member is detachably mounted to an inside bottom of the bag housing case for covering the at least one vent hole, and the bag pressure release mechanism is mounted to an outside bottom of the bag housing case for covering the vent hole.

4. An airbag device as set forth in claim 2, wherein the bag pressure release mechanism is designed to release gas within the airbag outside through the vent hole when the pressure higher than a predetermined pressure is formed within the airbag.

5. An airbag device comprising:

a bag housing case;

an airbag housed in a deflated, folded state in the bag housing case;

a strap member disposed within the airbag and connected to or formed integrally with the airbag; and

a bag pressure release mechanism provided in the bag housing case in confronting relation to an inside of the airbag, said mechanism being designed to open the airbag when an internal pressure of the airbag reaches a predetermined pressure after the airbag is inflated, thereby preventing an increase in the internal pressure of the airbag,

the strap member being designed such that it covers the bag pressure release mechanism when the airbag is deflated and is released from coverage of the bag pressure release mechanism by an inflating force of the airbag when the airbag is inflated.

6. An airbag device as set forth in claim 5, wherein the bag housing case has at least one vent hole formed in a bottom thereof.

7. An airbag device as set forth in claim 6 wherein the strap member is detachably mounted to an inside bottom of the bag housing case for covering the at least one vent hole, and the bag pressure release mechanism is mounted to an outside bottom of the bag housing case for covering the vent hole.

8. An airbag device as set forth in claim 6, wherein the bag pressure release mechanism is designed to release gas within the airbag outside through the vent hole when the pressure higher than a predetermined pressure is formed within the airbag.