Gas generator for air bag and air bag apparatus.

摘要

The present invention provide a gas generator for an air bag in which safety and reliability in operation are secured while the total size of a container is restricted a simple structure with the reduced number of parts is realized, and provides a gas generator in which ignition and combustion performance of the gas generating agent are enhanced. According to the gas generator for an air bag, a partition wall member is disposed to define the inner space of a housing into at least two chambers, a disk-like dividing member is disposed inside the partition wall member, a peripheral surface of the dividing member is provided with a pawl spreading like a petticoat toward a skirt portion of the partition wall member, and the pawl is fitted into a groove circumferentially formed in an inner peripheral surface of the annular peripheral wall. Further, a first combustion chamber 7a and a second combustion chamber 7b are provided in the housing 3, and the dividing member 5 is disposed in the partition wall member 4 at a position in such a range that a distance Lc from the axial center of the partition wall member 4 is not more than 1/4 of an axial average length Ld of the partition wall member.