INFLATOR AND AIRBAG DEVICE

摘要

To reduce the size of a disc-type, two-stage output inflator. An inflator includes: an inflator case (12) that is configured from a bottomed cylindrical upper case (42) and lower case (41), with the inflator case (12) having an upper combustion chamber (62) and a lower combustion chamber (61) in which gas generants (51, 52) are accommodated, the upper combustion chamber (62) and the lower combustion chamber (61) being partitioned by a partition wall (14), and with the inflator case having a peripheral wall (42U, 42L) in which upper gas discharge holes (72) and lower gas discharge holes (71) are formed; a first inner cylinder member (21) in which a transfer charge (91) for combusting the gas generant (51) inside the lower combustion chamber (61) is accommodated; a second inner cylinder member (22) whose upper end portion (22B) penetrates the partition wall (14) and is positioned in a lower portion of the upper combustion chamber (62), with a transfer charge (92) for combusting the gas generant (52) inside the upper combustion chamber (62) being accommodated inside the second inner cylinder member (22); a first igniter (31) that ignites the transfer charge (91) inside the first inner cylinder member (21); and a second igniter (32) that ignites the transfer charge (92) inside the second inner cylinder member (22).