Igniter holding structure

An igniter holding structure, comprising:

• an igniter including an ignition portion provided with an ignition agent and a conductive pin extending from the ignition portion;
• an attachment portion made of a metal and including,
• a through hole through which the igniter penetrates, and
• a circumferential wall portion defining in an inner side thereof a connector insertion portion for allowing a connector to be connected, the circumferential wall portion including a deep-side circumferential wall portion including an exposed surface that is exposed to the connector insertion portion at a side of the ignition portion, a front-side circumferential wall portion at a side of the conductive pin and having an inner diameter larger than an inner diameter of the deep-side circumferential wall portion, and formed on a more front side than the deep-side circumferential wall portion in an insertion direction of the connector with respect to the connector insertion portion, and a connecting portion forming an annular step between the deep-side circumferential wall portion and the front-side circumferential wall portion by connecting the deep-side circumferential wall portion to the front-side circumferential wall portion;
• a first resin portion made of a resin, provided between the igniter and the attachment portion, and holding the igniter in a manner that the ignition portion and a distal end of the conductive pin are located opposite each other across the through hole and the conductive pin is surrounded by the circumferential wall portion;
• and
• a second resin portion made of a resin and provided in the front-side circumferential wall portion, the second resin portion foil ling the connector insertion portion together with the exposed surface, the second resin portion is provided separated from the first resin portion on the inner side of the circumferential wall portion in a manner that the exposed surface is formed in the circumferential wall portion,
• wherein the exposed surface is formed continuously around an entire circumference in an inner circumferential direction of the circumferential wall portion, and
• the deep-side circumferential wall portion extends from the connecting portion in the insertion direction and the front-side circumferential wall portion extends from the connecting portion in a direction opposite to the insertion direction.

An igniter holding structure for a gas generator, used for attaching an igniter to an attachment portion made of metal, the attachment portion including a through hole through which the igniter penetrates and a circumferential wall portion including an inner surface of the through hole, the igniter holding structure, comprising:

• the igniter including an ignition portion including an ignition agent and a conductive pin extending from the ignition portion;
• a first resin portion made of a resin, provided between the igniter and the attachment portion, and holding the igniter in a manner that the ignition portion and a distal end of the conductive pin are located opposite each other across the through hole and the conductive pin is surrounded by the circumferential wall portion;
• and
• a second resin portion made of a resin and provided on the circumferential wall portion in a manner that a connector insertion portion is formed on an inner side of the circumferential wall portion, the connector insertion portion being a space for allowing a connector to be connected to the conductive pin to be inserted, wherein
• the second resin portion is provided separated from the first resin portion on the inner side of the circumferential wall portion in a manner that an exposed surface made of metal and exposed to the connector insertion portion is formed in the circumferential wall portion, and
• the circumferential wall portion includes:
• a deep-side circumferential wall portion in which the exposed surface is formed,
• a front-side circumferential wall portion formed on a more front side than the deep-side circumferential wall portion in an insertion direction of the connector with respect to the connector insertion portion and extending toward the outside of the circumferential wall portion further than the exposed surface,
• a connecting portion forming an annular step between the deep-side circumferential wall portion and the front-side circumferential wall portion by connecting the deep-side circumferential wall portion to the front-side circumferential wall portion, and
• the deep-side circumferential wall portion extends from the connecting portion in the insertion direction and the front-side circumferential wall portion extends from the connecting portion in a direction opposite to the insertion direction.

An igniter holding structure for a gas generator, used for attaching an igniter to an attachment portion made of metal, the attachment portion including a through hole through which the igniter penetrates and a circumferential wall portion including an inner surface of the through hole, the igniter holding structure, comprising:

• the igniter including an ignition portion including an ignition agent and a conductive pin extending from the ignition portion;
• a first resin portion made of a resin, provided between the igniter and the attachment portion, and holding the igniter in a manner that the ignition portion and a distal end of the conductive pin are located opposite each other across the through hole and the conductive pin is surrounded by the circumferential wall portion, the first resin portion covers a hole forming portion of the through hole and a part of an inner side of the circumferential wall portion below the through hole;
• and
• a second resin portion made of a resin and provided on the circumferential wall portion in a manner that a connector insertion portion is formed on an inner side of the circumferential wall portion, the connector insertion portion being a space for allowing a connector to be connected to the conductive pin to be inserted, wherein
• the second resin portion is provided separated from the first resin portion on the inner side of the circumferential wall portion in a manner that an exposed surface made of metal and exposed to the connector insertion portion is formed in the circumferential wall portion,
• the circumferential wall portion includes:
• a deep-side circumferential wall portion in which the exposed surface is formed,
• a front-side circumferential wall portion formed on a more front side than the deep-side circumferential wall portion in an insertion direction of the connector with respect to the connector insertion portion and extending toward the outside of the circumferential wall portion further than the exposed surface,
• a connecting portion forming an annular step between the deep-side circumferential wall portion and the front-side circumferential wall portion by connecting the deep-side circumferential wall portion to the front-side circumferential wall portion, and
• the deep-side circumferential wall portion extends from the connecting portion in the insertion direction and the front-side circumferential wall portion extends from the connecting portion in a direction opposite to the insertion direction.