| CPC B60R 21/274 (2013.01) [B60R 2021/26029 (2013.01); B60R 2021/2685 (2013.01)] | 14 Claims |
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7. A gas generator comprising:
a first ignition device;
a first inner tube member forming an ignition unit chamber including therein the first ignition device and including a surrounding wall portion provided with one or a plurality of communication holes, the surrounding wall portion including, in a circumferential direction thereof,
a combustion product discharge region in which the one communication hole is disposed or the plurality of communication holes are collectively disposed and,
a combustion product non-discharge region being a region other than the combustion product discharge region; and
a housing including a peripheral wall portion and defining therein a first combustion chamber in which a first gas generating agent, the first ignition device, and the first inner tube member are provided, the peripheral wall portion being provided with
a first gas discharge port and a second gas discharge port having an opening pressure higher than an opening pressure of the first gas discharge port, the first gas discharge port and the second gas discharge port allowing the first combustion chamber and an outside of the housing to communicate with each other by opening upon receiving a combustion pressure
a communication hole-associated region associated with the combustion product discharge region and including only the first gas discharge port formed therein and a communication hole non-associated region associated with the combustion product non-discharge region and including the second gas discharge port formed therein, and
a range of the communication hole-associated region is defined by a first imaginary straight line extending from a center axis of the surrounding wall portion, passing through one end portion of the combustion product discharge region in the circumferential direction of the surrounding wall portion and intersecting the peripheral wall portion, and a second imaginary straight line extending from the center axis of the surrounding wall portion, passing through another end portion of the combustion product discharge region in the circumferential direction of the surrounding wall portion and intersecting the peripheral wall portion, as viewed in an axial direction of the surrounding wall portion.
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