Igniter assembly and gas generator provided with same

An igniter assembly, comprising:

• an igniter body including an ignition portion filled with an igniting charge and an electro-conductive portion extending from the ignition portion;
• an igniter collar including a tubular peripheral wall portion that surrounds at least the electro-conductive portion of the igniter body;
• and
• a resin molded article that is interposed between the igniter body and the igniter collar and integrates the igniter body and the igniter collar,
• the igniter collar including:
• a first support portion that is provided in an inner peripheral portion of the peripheral wall portion and is formed in a convex shape toward an inner side of the peripheral wall portion in a radial direction and thus buried in the resin molded article;
• and
• a second support portion that is provided at a position in the inner peripheral portion proximal to the first support portion from the ignition portion in a direction along a center axis of the peripheral wall portion and is formed in a convex shape toward the inner side of the peripheral wall portion in the radial direction and thus buried in the resin molded article or formed in a concave shape toward an outer side of the peripheral wall portion in the radial direction and thus filled with the resin molded article, wherein
• a minimum dimension of the first support portion in the direction along the center axis is equal to or larger than a minimum dimension of the second support portion in the direction along the center axis.