US12595991 - Gas generator
The patent describes a gas generator designed to ignite a gas-generating agent using an ignition device, which includes a resin-based igniter holding portion and a case that accommodates the agent. The case features an inclined surface and a fragile part that ruptures during combustion, allowing for controlled deformation and outward opening while being restricted by a surrounding portion.
Claim 1
1 . A gas generator comprising: an ignition device including an igniter, an igniter holding portion having a tubular shape and being configured to hold the igniter in a state of surrounding the igniter, and a fixing portion made of resin and being configured to fix the igniter to the igniter holding portion; and a case having a bottomed tubular shape and being configured to accommodate a gas generating agent which combusts by actuation of the ignition device, the case being made of resin and including a side wall portion with a base end side connected to the fixing portion, and a closing end portion configured to close a tip end side, wherein the case includes an inclined surface extending obliquely with respect to an axial direction of the case on the tip end side, a fragile part formed at an edge portion excluding at least a base end portion of the inclined surface, a top portion of the inclined surface is a tip end of the closing end portion, in the case, the tip end of the closing end portion ruptures at a time of combustion of the gas generating agent, and the inclined surface deforms and thus opens outward with a side of the base end portion of the inclined surface as a fulcrum, and the case includes a restriction portion that is formed and thus surrounds the inclined surface, and restricts a deformation amount when the inclined surface opens outward. an ignition device including an igniter, an igniter holding portion having a tubular shape and being configured to hold the igniter in a state of surrounding the igniter, and a fixing portion made of resin and being configured to fix the igniter to the igniter holding portion; and a case having a bottomed tubular shape and being configured to accommodate a gas generating agent which combusts by actuation of the ignition device, the case being made of resin and including a side wall portion with a base end side connected to the fixing portion, and a closing end portion configured to close a tip end side, wherein the case includes an inclined surface extending obliquely with respect to an axial direction of the case on the tip end side, a fragile part formed at an edge portion excluding at least a base end portion of the inclined surface, a top portion of the inclined surface is a tip end of the closing end portion, in the case, the tip end of the closing end portion ruptures at a time of combustion of the gas generating agent, and the inclined surface deforms and thus opens outward with a side of the base end portion of the inclined surface as a fulcrum, and the case includes a restriction portion that is formed and thus surrounds the inclined surface, and restricts a deformation amount when the inclined surface opens outward. an inclined surface extending obliquely with respect to an axial direction of the case on the tip end side, a fragile part formed at an edge portion excluding at least a base end portion of the inclined surface, a top portion of the inclined surface is a tip end of the closing end portion, in the case, the tip end of the closing end portion ruptures at a time of combustion of the gas generating agent, and the inclined surface deforms and thus opens outward with a side of the base end portion of the inclined surface as a fulcrum, and the case includes a restriction portion that is formed and thus surrounds the inclined surface, and restricts a deformation amount when the inclined surface opens outward.
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USPTO PDF
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