Gas generator

A gas generator, comprising:

• a cylindrical housing main body made of metal, the housing main body containing a combustion chamber where a gas generating agent is accommodated;
• a holder assembly inserted in an opening end in an axial direction of the housing main body, the holder assembly including a hollow opening, the hollow opening being a through hole and extending along a direction in parallel to the axial direction;
• and
• an igniter including an ignition portion where an ignition agent is accommodated and a terminal pin connected to the ignition portion, at least a part of the igniter being arranged in inside of the hollow opening while the ignition portion is located on a side of the combustion chamber and the terminal pin is located opposite to the side of the combustion chamber, wherein
• the holder assembly includes
• a holder portion made of metal, the holder portion being located on the side of the combustion chamber, the holder portion receiving and holding the igniter, and
• a connector portion made of resin, the connector portion being located opposite to the side of the combustion chamber, the connector portion receiving a connector connected to the terminal pin,
• the holder portion includes a first barrel portion in a cylindrical shape that defines the hollow opening,
• the connector portion includes
• a second barrel portion in a cylindrical shape that defines the hollow opening, and
• a locking portion that projects from the second barrel portion toward an inner circumferential surface of the housing main body,
• the first barrel portion is provided with a first end surface that faces the second barrel portion, at an end of the first barrel portion opposite to the combustion chamber,
• the first end surface is provided with a recess,
• the second barrel portion is provided with a second end surface that faces the first barrel portion, at an end of the second barrel portion on the side of the combustion chamber,
• the second end surface is provided with a projection,
• the inner circumferential surface of the housing main body is provided with a step portion where the locking portion can be locked,
• the projection and the recess abut on each other in the axial direction and the locking portion and the step portion abut on each other in the axial direction so that the connector portion is immovably fixed in the axial direction, and
• while elastic resilience in a circumferential direction of the housing main body is produced in the projection owing to deformation by compression of the projection in the axial direction, the projection and the recess abut on each other in the circumferential direction so that the connector portion is immovably fixed in the circumferential direction.