Gas generator for airbag device
First Claim
1. A gas generator for inflating an airbag of an airbag device of in a vehicle, comprising:
- a deployment activating initiator having a predetermined amount of ignition powder therein and configured to be activated by an impact on the vehicle;
a main gas generating agent that generates a main gas for inflating the airbag when burned, the main gas generating agent being circumferentially surrounded by a filter;
wall portions defining a housing within which the main gas generating agent and filter are located;
additional wall portions defining a secondary gas generation chamber within which the initiator is located, the initiator being centrally located within the secondary gas generation chamber, the additional wall portions further being circumferentially surrounded by the filter so that the filter and the additional wall portions cooperate to define a main gas generation chamber within which the main gas generating agent is located;
a secondary gas generating agent located within the secondary gas generation chamber about the initiator, the secondary gas generating agent and the main gas generating agent being the same material, and the secondary gas generation chamber being provided such that the secondary gas generating agent surrounds a top and sides of the initiator; and
wherein the initiator is configured such that when the initiator is activated, a shockwave is generated around the top and sides of the initiator and the secondary gas generating agent is pulverized and burned by the shockwave, whereupon the main gas generating agent is ignited by the burning of the secondary gas generating agent, and a total amount of the ignition powder charged into the initiator is in a range of 400 to 600 mg.
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Accused Products
Abstract
A small, lightweight, and inexpensive gas generator for an airbag device. The gas generator for an airbag device according to the present invention includes: a deployment activating initiator that accommodates a predetermined amount of ignition powder and is activated by an impact on a vehicle; a main gas generating agent that generates a main gas for inflating an airbag when burned; a main gas generation chamber that accommodates the main gas generating agent; a secondary gas generation chamber that is provided in an interior of the main gas generation chamber and accommodates the initiator; and a secondary gas generating agent accommodated in the secondary gas generation chamber.
18 Citations
9 Claims
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1. A gas generator for inflating an airbag of an airbag device of in a vehicle, comprising:
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a deployment activating initiator having a predetermined amount of ignition powder therein and configured to be activated by an impact on the vehicle; a main gas generating agent that generates a main gas for inflating the airbag when burned, the main gas generating agent being circumferentially surrounded by a filter; wall portions defining a housing within which the main gas generating agent and filter are located; additional wall portions defining a secondary gas generation chamber within which the initiator is located, the initiator being centrally located within the secondary gas generation chamber, the additional wall portions further being circumferentially surrounded by the filter so that the filter and the additional wall portions cooperate to define a main gas generation chamber within which the main gas generating agent is located; a secondary gas generating agent located within the secondary gas generation chamber about the initiator, the secondary gas generating agent and the main gas generating agent being the same material, and the secondary gas generation chamber being provided such that the secondary gas generating agent surrounds a top and sides of the initiator; and wherein the initiator is configured such that when the initiator is activated, a shockwave is generated around the top and sides of the initiator and the secondary gas generating agent is pulverized and burned by the shockwave, whereupon the main gas generating agent is ignited by the burning of the secondary gas generating agent, and a total amount of the ignition powder charged into the initiator is in a range of 400 to 600 mg. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification