APPARATUS INCLUDING IGNITER ASSEMBLY

• US 20080067791A1
• Filed: 09/05/2007
• Published: 03/20/2008
• Est. Priority Date: 09/05/2006
• Status: Active Grant

• Current Assignee: Daicel Chemical Industries Limited (Daicel Corporation)
• Original Assignee: Daicel Chemical Industries Limited (Daicel Corporation)
• Inventors: YAMAZAKI, Masayuki
• Granted Patent: US 7,744,124 B2
• Time in Patent Office: Days
• US Class Current: 280/734
• CPC Class Codes: F42B 3/103 Mounting initiator heads in initiators; Sealing-plugs
• CPC Class Codes: F42B 3/198 of electric initiator heads e.g., testing, machines

Abstract

The present invention provides an apparatus provided with an igniter assembly including: an igniter main body having an ignition portion, provided with an ignition agent, and an electroconductive pin, a resin portion surrounding at least part of the igniter main body and a substantially cylindrical igniter collar fixed to an outer surface of the resin portion, the igniter assembly being disposed in an opening formed in a bottom portion of a housing, the igniter collar of the igniter assembly being fixed to the housing, the igniter collar fixing to the resin portion y deforming the igniter collar so as to engage the igniter collar with a concave portion in the resin portion.

Claims

1. An apparatus provided with an igniter assembly comprising:

an igniter main body having an ignition portion, provided with an ignition agent, and an electroconductive pin, a resin portion surrounding at least part of the igniter main body and a substantially cylindrical igniter collar fixed to an outer surface of the resin portion,

the igniter assembly being disposed in an opening formed in a bottom portion of a housing,

the igniter collar of the igniter assembly being fixed to the housing,

the igniter collar fixing to the resin portion by deforming the igniter collar so as to engage the igniter collar with a concave portion in the resin portion.

4. The apparatus provided with an igniter assembly according to claim 1, wherein

the igniter assembly has an annular holding plate having a hole and embedded in the resin portion;

the annular holding plate is positioned between at least two reduced diameter portions formed separately in the axial direction of the igniter collar, and the annular holding plate is disposed so that the electroconductive pin passes inside through the hole; and

an outer diameter of the annular holding plate is larger than inner diameters of the two reduced diameter portions, and an inner diameter of the annular holding plate is less than an outer diameter of the ignition portion of the igniter main body.

7. The apparatus provided with an igniter assembly according to claim 1, wherein the annular holding plate protrudes at an outer surface of the resin portion and forms at least part of a wall surface of a concave portion of the resin portion.

10. The apparatus provided with an igniter assembly according to claim 1, wherein in a contact portion of the igniter collar and the concave portion of the resin portion, a sealing member is inserted between the igniter collar and the concave portion of the resin portion.

13. The apparatus provided with an igniter assembly according to claim 1, wherein the housing is obtained by joining a diffuser shell having a gas discharge port and a closure shell, the closure shell has at least a flat bottom surface and a circumferential wall surface, and a height (h₁) of the circumferential wall surface of the closure shell and a height (h₂) of a deformed portion of the igniter collar, based on the flat bottom surface of closure shell, satisfy the relationship h₂>

h₁.

2. An apparatus provided with an igniter assembly comprising:

an igniter main body having an ignition portion, provided with an ignition agent, and an electroconductive pin, a resin portion surrounding at least part of the igniter main body and a substantially cylindrical igniter collar fixed to an outer surface of the resin portion,

the igniter assembly being disposed in an opening formed in a bottom portion of a housing,

the igniter collar being formed by integrating a circumferential edge of the opening in the bottom portion of the housing with a substantially cylindrical member,

the igniter collar fixing to the resin portion by deforming the igniter collar so as to engage the igniter collar with a concave portion in the resin portion.

5. The apparatus provided with an igniter assembly according to claim 2, wherein

the igniter assembly has an annular holding plate having a hole and embedded in the resin portion;

the annular holding plate is positioned between at least two reduced diameter portions formed separately in the axial direction of the igniter collar, and the annular holding plate is disposed so that the electroconductive pin passes inside through the hole; and

an outer diameter of the annular holding plate is larger than inner diameters of the two reduced diameter portions, and an inner diameter of the annular holding plate is less than an outer diameter of the ignition portion of the igniter main body.

8. The apparatus provided with an igniter assembly according to claim 2, wherein the annular holding plate protrudes at an outer surface of the resin portion and forms at least part of a wall surface of a concave portion of the resin portion.

11. The apparatus provided with an igniter assembly according to claim 2, wherein in a contact portion of the igniter collar and the concave portion of the resin portion, a sealing member is inserted between the igniter collar and the concave portion of the resin portion.

14. The apparatus provided with an igniter assembly according to claim 2, wherein the housing is obtained by joining a diffuser shell having a gas discharge port and a closure shell, the closure shell has at least a flat bottom surface and a circumferential wall surface, and a height (h₁) of the circumferential wall surface of the closure shell and a height (h₂) of a deformed portion of the igniter collar, based on the flat bottom surface of closure shell, satisfy the relationship h₂>

h₁.

17. The method of assembling an apparatus provided with the igniter assembly according to claim 8, wherein

a collar which has a first reduced diameter portion formed in an opening at one end thereof, and in which an inner diameter of the first reduced diameter portion is more than an outer diameter of an ignition portion of the igniter assembly and less than an outer diameter of the resin portion, is used as the substantially cylindrical igniter collar;

and

when the intermediate body is inserted into the igniter collar, the insertion is performed till the resin portion abuts against the first reduced diameter portion.

3. An apparatus provided with an igniter assembly comprising:

an igniter main body having an ignition portion, provided with an ignition agent, and an electroconductive pin, a resin portion surrounding at least part of the igniter main body and a substantially cylindrical igniter collar fixed to an outer surface of the resin portion,

the igniter assembly being disposed in an opening formed in a bottom portion of a housing,

in the igniter assembly, part including the ignition portion being at least covered with a bottomed tubular member, the igniter collar of the igniter assembly being formed by integrating a circumferential edge of the opening in the bottom portion of the housing, a substantially cylindrical member and a circumferential edge of an opening of the bottomed tubular member,

the igniter collar fixing to the resin portion by deforming the igniter collar so as to engage the igniter collar with a concave portion in the resin portion.

6. The apparatus provided with an igniter assembly according to claim 3, wherein

the igniter assembly has an annular holding plate having a hole and embedded in the resin portion;

the annular holding plate is positioned between at least two reduced diameter portions formed separately in the axial direction of the igniter collar, and the annular holding plate is disposed so that the electroconductive pin passes inside through the hole; and

an outer diameter of the annular holding plate is larger than inner diameters of the two reduced diameter portions, and an inner diameter of the annular holding plate is less than an outer diameter of the ignition portion of the igniter main body.

9. The apparatus provided with an igniter assembly according to claim 3, wherein the annular holding plate protrudes at an outer surface of the resin portion and forms at least part of a wall surface of a concave portion of the resin portion.

12. The apparatus provided with an igniter assembly according to claim 3, wherein in a contact portion of the igniter collar and the concave portion of the resin portion, a sealing member is inserted between the igniter collar and the concave portion of the resin portion.

15. The apparatus provided with an igniter assembly according to claim 3, wherein the housing is obtained by joining a diffuser shell having a gas discharge port and a closure shell, the closure shell has at least a flat bottom surface and a circumferential wall surface, and a height (h₁) of the circumferential wall surface of the closure shell and a height (h₂) of a deformed portion of the igniter collar, based on the flat bottom surface of closure shell, satisfy the relationship h₂>

h₁.

18. The method of assembling an apparatus provided with the igniter assembly according to claim 9, wherein

a collar having a first reduced diameter portion formed in an opening at one end side thereof and a second reduced diameter portion formed in the axial direction separately from the first reduced diameter portion is used as the substantially cylindrical igniter collar;

a body in which an annular holding plate is embedded in the resin portion, an outer diameter of the annular holding plate is larger than inner diameters of the first reduced diameter portion and the second reduced diameter portion, and in which an inner diameter of the annular holding plate is less than an outer diameter of an ignition portion of the igniter main body, is used as the intermediate body; and

the intermediate body is inserted so that the annular holding plate of the resin portion is positioned between the first reduced diameter portion and the second reduced diameter portion.

16. A method of assembling an apparatus provided with an igniter assembly, comprising the steps of:

inserting an intermediate body including the igniter main body and the resin portion and having a concave portion in a circumferential surface of the resin portion, into the substantially cylindrical igniter collar integrated with the housing; and

applying a pressure to the portion of an outer circumferential surface of the igniter collar that is directly opposite the concave portion of the resin portion to cause deformation into a shape matching that of the convex portion of the resin portion, and fixing the resin portion to the igniter collar.