| CPC B60R 21/2644 (2013.01) | 14 Claims |
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1. A gas generator which is configured to be incorporated in an airbag device and supply gas to an airbag for inflating the airbag, the gas generator comprising:
an igniter;
a gas generation source configured to generate the gas upon actuation of the igniter;
a housing accommodating the igniter and the gas generation source inside the housing; and
a plurality of gas discharge ports formed in the housing, the plurality of gas discharge ports being closed by a closing structure prior to the actuation of the igniter, and opened when the closing structure is ruptured by a pressure of the gas generated by the actuation of the igniter, to enable an inside and an outside of the housing to connect with each other, wherein
the plurality of gas discharge ports include a plurality of first gas discharge ports and one or a plurality of second gas discharge ports, the one or each of the plurality of the second gas discharge ports having a higher opening pressure than each of the plurality of the first gas discharge ports,
in an arrangement of the plurality of first gas discharge ports in the housing, in an assembled state in which the gas generator is incorporated in the airbag device, a structure of the airbag device prevents some of the plurality of the first gas discharge ports from opening by the pressure of the gas,
in an arrangement of the one or the plurality of second gas discharge ports in the housing, in the assembled state, the structure of the airbag device does not prevent the one or at least some of the plurality of second gas discharge ports from opening by the pressure of the gas, and
an opening pressure of the plurality of the first gas discharge ports and an opening pressure of the one or the plurality of the second gas discharge ports are set: to cause only the plurality of first gas discharge ports to open by the pressure of the gas among the plurality of the gas discharge ports when the igniter is actuated in a stand-alone state prior to the incorporation of the gas generator into the airbag device; and to cause the first gas discharge ports, excluding the some of the plurality of the first gas discharge ports, and the one or the at least some of the plurality of the second gas discharge ports to open by the pressure of the gas among the plurality of gas discharge ports when the igniter is actuated in the assembled state.
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