Igniter assembly for gas generator and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-10663268-B2
Application number	US-201716345022-A
Country	US
Kind code	B2
Filing date	Oct 17, 2017
Priority date	Nov 29, 2016
Publication date	May 26, 2020
Grant date	May 26, 2020

Abstract

an electrically insulating partition wall having a thickness of 0.1 mm to 1 mm, provided with no through hole, and interposed between a root portion of the electroconductive pin, which is in contact with the resin molded article, and the second end of the spark member.

First claim

The invention claimed is:

1. An igniter assembly in which an igniter having an ignition portion and an electroconductive pin, and a metallic igniter retaining member are integrated with a resin molded article interposed therebetween, the igniter assembly, comprising:
a connector insertion space formed by the resin molded article, the electroconductive pin being protruding from the resin molded article and located in the connector insertion space;
a spark member including,
a first end connected to the metallic igniter retaining member, and
a second end, opposite to the first end, located inside the connector insertion space; and

an electrically insulating partition wall having a thickness of 0.1 mm to 1 mm, provided with no through hole, and interposed between a root portion of the electroconductive pin, which is in contact with the resin molded article, and the second end of the spark member.

2. An igniter assembly in which an igniter having an ignition portion and an electroconductive pin, and a metallic igniter retaining member are integrated with a resin molded article interposed therebetween, the igniter assembly, comprising:
a connector insertion space formed by the resin molded article, the electroconductive pin being protruding from the resin molded article and located in the connector insertion space;
a spark member including,
a first end connected to the metallic igniter retaining member, and a second end, opposite to the first end, located inside the connector insertion space; and

an electrically insulating partition wall having a thickness of 0.1 mm to 2 mm, provided with a through hole, and interposed between a root portion of the electroconductive pin, which is in contact with the resin molded article, and the second end of the spark member, and the second end and the through hole facing each other.

3. The igniter assembly according to claim 1 , wherein the electrically insulating partition wall is a member separate from the resin molded article, in a shape selected from a cylindrical shape, a semi-cylindrical shape and a flat plate shape,
the cylindrical electrically insulating partition wall is disposed between a root portion of the electroconductive pin which is in contact with the resin molded article, and the second end of the spark member to surround the root portion, and
the semi-cylindrical electrically insulating partition wall or the flat plate-shaped electrically insulating partition wall is disposed between the root portion of the electroconductive pin, which is in contact with the resin molded article, and the second end of the spark member.

4. The igniter assembly according to claim 2 , wherein the electrically insulating partition wall is a member separate from the resin molded article, in a shape selected from a cylindrical shape, a semi-cylindrical shape and a flat plate shape,
the cylindrical electrically insulating partition wall is disposed between a root portion of the electroconductive pin which is in contact with the resin molded article, and the second end of the spark member to surround the root portion, and
the semi-cylindrical electrically insulating partition wall or the flat plate-shaped electrically insulating partition wall is disposed between the root portion of the electroconductive pin, which is in contact with the resin molded article, and the second end of the spark member.

5. The igniter assembly according to claim 3 , wherein the electrically insulating partition wall is partially embedded in the resin molded article and the remaining portion thereof protrudes into the connector insertion space.

6. The igniter assembly according to claim 4 , wherein the electrically insulating partition wall is partially embedded in the resin molded article and the remaining portion thereof protrudes into the connector insertion space.

7. The igniter assembly according to claim 1 , wherein the electrically insulating partition wall is a part of the resin molded article in a shape selected from a cylindrical shape, a semi-cylindrical shape, and a flat plate shape,
the cylindrical electrically insulating partition wall is disposed between the root portion of the electroconductive pin which is in contact with the resin molded article, and the second end of the spark member to surround the root portion, and
the semi-cylindrical electrically insulating partition wall or the flat plate-shaped electrically insulating partition wall is disposed between the root portion of the electroconductive pin, which is in contact with the resin molded article, and the second end of the spark member.

8. The igniter assembly according to claim 2 , wherein the electrically insulating partition wall is a part of the resin molded article in a shape selected from a cylindrical shape, a semi-cylindrical shape, and a flat plate shape,
the cylindrical electrically insulating partition wall is disposed between the root portion of the electroconductive pin which is in contact with the resin molded article, and the second end of the spark member to surround the root portion, and
the semi-cylindrical electrically insulating partition wall or the flat plate-shaped electrically insulating partition wall is disposed between the root portion of the electroconductive pin, which is in contact with the resin molded article, and the second end of the spark member.

9. The igniter assembly according to claim 1 , wherein at least a part of the spark member between the first end and the second end is embedded in the resin molded article.

10. The igniter assembly according to claim 2 , wherein at least a part of the spark member between the first end and the second end is embedded in the resin molded article.

11. The igniter assembly according to claim 1 , wherein the metallic igniter retaining member has an outer annular surface, a cylindrical wall provided vertically from a hole of the outer annular surface, and an inner annular surface extending radially inward from the cylindrical wall, and
an inner surface of the cylindrical wall and an inner circumferential edge of a hole in the inner annular surface are in contact with the resin molded article.

12. The igniter assembly according to claim 2 , wherein the metallic igniter retaining member has an outer annular surface, a cylindrical wall provided vertically from a hole of the outer annular surface, and an inner annular surface extending radially inward from the cylindrical wall, and
an inner surface of the cylindrical wall and an inner circumferential edge of a hole in the inner annular surface are in contact with the resin molded article.

13. The igniter assembly according to claim 1 , wherein the spark member is integrally formed with the metallic igniter retaining member.

14. The igniter assembly according to claim 2 , wherein the spark member is integrally formed with the metallic igniter retaining member.

15. A method of manufacturing the igniter assembly according to claim 3 , comprising a step of injection-molding a resin to form the resin molding article in the state that the igniter, the metallic igniter retaining member and a member formed of a resin to serve as an electrically insulating partition wall in a shape selected from a cylindrical shape, a semi-cylindrical shape and a flat plate shape are disposed in a mold.

16. A method of manufacturing the igniter assembly according to claim 4 , comprising a step of injection-molding a resin to form the resin molding article in the state that the igniter, the metallic igniter retaining member and a member formed of a resin to serve as an electrically insulating partition wall in a

Assignees

• Daicel Corp

Inventors

• Oda Shingo

Classifications

• B60R2021/26029

  Ignitors · CPC title

• F42B3/14 Primary

  Spark initiators {(F42B3/195 takes precedence)} · CPC title

• F42B3/182

  having shunting means {(F42B3/185 takes precedence; details of shunting devices H01R13/7032)} · CPC title

• B60R21/264

  using instantaneous generation of gas, e.g. pyrotechnic (B60R21/268 takes precedence) · CPC title

• F42B3/12 Primary

  Bridge initiators {(F42B3/103, F42B3/11, F42B3/195 take precedence; electric ignitors in propellant charges F42C19/12)} · CPC title