Gas generator

A gas generator, comprising:

• an ignition chamber including an igniter provided at one end of a cylindrical housing;
• a diffuser, including a gas discharge port, provided at an opposite end of the cylindrical housing, the opposite end being on an axially opposite side of the one end;
• and
• a combustion chamber defined inside the cylindrical housing between the ignition chamber and the diffuser and containing a molded article of a gas generating agent, the ignition chamber and the combustion chamber being partitioned by a closing member having a rupturable area,
• wherein:
• a molded article of a transfer charge is contained in the ignition chamber, and the rupturable area of the closing member is configured to rupture due to an increase in a pressure in the ignition chamber by an activation of the gas generator,
• an inner tube is disposed in the combustion chamber and extends from the closing member toward the diffuser,
• the inner tube has a plurality of through holes in a peripheral wall thereof to allow fluid communication between an inside of the inner tube and the combustion chamber, and a first end attached to the rupturable area of the closing member,
• a minimum inner diameter (Dmin) of the inner tube is larger than a maximum length (Lmax) of the molded article of the transfer charge, and
• the inner tube defines, therein, a hollow space, free from the molded article of the transfer charge, from the first end to a second end prior to the activation of the igniter, and allows the molded article of the transfer charge to travel towards the second end of the inner tube after the rupturable area is ruptured.