GAS GENERATOR FOR AIR BAG

摘要

A gas generator for air bags which is used for air bag devices which ensure safety of a driver and a passenger from shocks due to a car crush and so on. The gas generator comprises the following components, so that slug in a gas is prevented from flowing outside and reduction of the number of parts enables manufacturing of the gas generator at lower cost. The gas generator comprises a housing (3) formed by closing ends of a side cylinder (1b) having a plurality of gas discharge ports (8) by means of an upper cover (1a) and a lower cover (2a), an ignition device (16) provided centrally in the housing (3) for generating flames, a gas generating agent (6) provided diametrically outwardly of the ignition device (16) in the housing (3) and adapted to burn to generate a gas, a cooling/filtering member (7) provided diametrically outwardly of the gas generating agent (6) in the housing (3) to extend from the upper cover (1a) to the lower cover (2a), and an annular projection (50) for preventing gases generated by combustion of the gas generating agent (6) from flowing toward an end of the cooling/filtering member (7). The annular projection (50) is formed integrally on at least one of the upper cover (1a) and the lower cover (2a) in such a manner as to abut against an inner peripheral surface of the cooling/filtering member (7).