Air bag module

• US 7,510,210 B2
• Filed: 08/07/2006
• Issued: 03/31/2009
• Est. Priority Date: 08/08/2005
• Status: Expired due to Fees

• Current Assignee: Daicel Chemical Industries Limited
• Original Assignee: Daicel Chemical Industries Limited
• Inventors: Katsuda, Nobuyuki, Yabuta, Mikio
• Primary Examiner(s): To; Toan C
• Application Number:
  US11/499,695
• Publication Number:
  US 20070029769A1
• Time in Patent Office: 967 Days
• Field of Search: 280/731, 280/732, 280/736, 280/737, 280/740, 280/741, 280/742
• US Class Current: 280/736
• CPC Class Codes: B60R 2021/2648 comprising a plurality of combustion chambers or sub-chambers
• CPC Class Codes: B60R 21/217 Inflation fluid source retainers, e.g. reaction canisters; Connection of bags, covers, diffusers or inflation fluid sources therewith or together

Abstract

The present invention provides an air bag module comprising;

• • a module case accommodating a gas generator and an airbag,
  • the gas generator having a housing, which is a assembly of a first base plate and a second base plate provided with a plurality of gas discharge ports, and at least one combustion chamber accommodated inside the housing,
  • the module case being attached to a connection section of the first base plate and the second base plate at an opening portion of the module case.

Claims

1. An air bag module, comprising:

an ignition device;

an igniter collar that supports the ignition device;

a first base plate adapted to support the ignition device;

a second base plate provided with a gas discharge port, the first base plate and the second base plate being adapted to define a combustion chamber when the first base plate and the second base plate are attached to one another;

a cup-shaped container including an open end and fixed to the first base plate by attaching the open end to the igniter collar, the cup-shaped container being provided within the combustion chamber and accommodating a gas generating agent therein;

a module case adapted to cover the first base plate and the second base plate; and

a fixing member for fastening the first base plate, the second base plate, and the module case by penetrating through the first base plate, the second base plate, and the module case,

wherein, the cup-shaped container, the first base plate, and the second base plate define a space in which no gas generating agent is provided.

2. The air bag module according to claim 1, wherein the ignition device is accommodated inside the cup-shaped container, and

wherein the cup-shaped container has a fragile section that is ruptured by actuation of the ignition device to form a gas discharge path.

3. The air bag module according to claim 1, wherein the fixing member is a bolt and a nut.

4. The air bag module according to claim 1, further comprising:

an air bag accommodated inside the module case,

wherein the fixing member also penetrates through an inlet portion of the air bag, such that the air bag is secured to the first base plate, the second base plate, and the module case.

5. An air bag module, comprising:

a first base plate including a first hole formed in a peripheral edge thereof and defining a first igniter accommodating hole;

a second base plate including a gas discharge port formed in a peripheral surface thereof, the second base plate defining a second hole, the first base plate and the second base plate defining therein an accommodating space;

a first igniter provided in a first igniter collar and attached to the first igniter accommodating hole;

a first container defining therein a first combustion chamber and including a first gas generating agent, such that the first container blocks out moisture from the first combustion chamber, the first container being a cup-shaped container including a first open end and fixed to the first base plate by attaching the first open end to the first igniter collar, the first container being provided within the accommodating space;

a fixing member inserted in the first hole and the second hole for fixing the first base plate to the second base plate, the first base plate and the second base plate being fixed to one another only by the fixing member; and

a module case accommodating therein an air bag and connected to the second base plate,

wherein the accommodating space defined outside the first container contains no gas generating agent including the first gas generating agent.

6. An air bag module according to claim 5,

wherein the first base plate includes a second igniter accommodating hole, and

the air bag module, further comprising:

a second igniter provided in a second igniter collar and attached to the second igniter accommodating hole; and

a second container defining therein a second combustion chamber and including a second gas generating agent such that the second container blocks out moisture, the second container being a cup-shaped container including a second open end and fixed to the first base plate by attaching the second open end to the second igniter collar, the second container being provided within the accommodating space.

7. An air bag module according to claim 6, wherein the first container and the second container includes a fragile section ruptured by an actuation of the first igniter and the second igniter, respectively, and form a gas discharge path.

8. An air bag module according to claim 6, wherein the second igniter collar is made of metal.

9. An air bag module according to claim 6, further comprising:

a gas generator having the first base plate, the first igniter, the second igniter, the first container, and the second container,

wherein the module case includes the air bag and the second base plate.

10. An air bag module according to claim 5, wherein the first igniter collar is made of metal.

11. An air bag module according to claim 5, wherein the fixing member is a bolt and a nut.

12. An air bag module according to claim 5, further comprising:

a gas generator having the first base plate, the first igniter, and the first container,

wherein the module case includes the air bag and the second base plate.