Apparatus including igniter assembly

• US 8,083,256 B2
• Filed: 05/14/2010
• Issued: 12/27/2011
• Est. Priority Date: 09/05/2006
• Status: Active Grant

• Current Assignee: Daicel Chemical Industries Limited
• Original Assignee: Daicel Chemical Industries Limited
• Inventors: Yamazaki, Masayuki
• Primary Examiner(s): Brown, Drew
• Application Number:
  US12/780,734
• Publication Number:
  US 20100236439A1
• Time in Patent Office: 592 Days
• Field of Search: 280/736, 280/741, 102/530, 102/531, 102/200
• US Class Current: 280/736
• 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

An apparatus provided with an igniter assembly includes, an igniter main body having an ignition portion, provided with an ignition agent, and an electoroconductive 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 is disposed in an opening formed in a bottom portion of a housing, the igniter collar of the igniter assembly is fixed fixed to the housing, and the igniter collar is fixed to the resin portion by 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 being integrally formed with the bottom portion of the housing and extending into the housing from a circumferential edge of the opening in an axial direction of the housing, the igniter collar having a first reduced diameter portion and a second reduced diameter portion formed at a position away from the first reduced diameter portion in the axial direction, the second reduced diameter portion engaging with a concave portion formed in the resin portion, and

the resin portion being fixed to the igniter collar by the first reduced diameter portion and the second reduced diameter portion.

2. 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 the first and second reduced diameter portions, and the annular holding plate is disposed so that the electroconductive pin passes through the hole; and

an outer diameter of the annular holding plate is larger than inner diameters of the first and second diameter portions, and an inner diameter of the annular holding plate is smaller than an outer diameter of the ignition portion of the igniter main body.

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

4. The apparatus provided with the igniter assembly according to claim 3, wherein

an inner diameter of the first reduced diameter portion is larger than an outer diameter of the ignition portion of the igniter assembly and smaller than an outer diameter of the resin portion, and

the resin portion abuts against the first reduced diameter portion.

5. The apparatus provided with an igniter assembly according to claim 1, wherein a sealing member is inserted between the second reduced diameter portion of the igniter collar and the concave portion of the resin portion.

6. The apparatus provided with an igniter assembly according to claim 1, wherein the housing is formed 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 the second reduced diameter portion of the igniter collar, based on the flat bottom surface of the closure shell, satisfy the relationship h₂>

h₁.

7. 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, and surrounded by a bottomed tubular member integrally formed with the bottom portion of the housing and extending into the housing from a circumferential edge of the opening along an axial direction of the housing, the igniter collar having a first reduced diameter portion and a second reduced diameter portion formed at a position away from the first reduced diameter portion in the axial direction, the second reduced diameter portion engaging with a concave portion formed in the resin portion,

the resin portion being fixed to the igniter collar by the first reduced diameter portion and the second reduced diameter portion.

8. The apparatus provided with an igniter assembly according to claim 7, 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 the first and second reduced diameter portions, and the annular holding plate is disposed so that the electroconductive pin passes through the hole; and

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

9. The apparatus provided with an igniter assembly according to claim 7, wherein an annular holding plate protrudes from 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 method of assembling an apparatus provided with the igniter assembly according to claim 9, wherein

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 smaller than an outer diameter of the ignition portion of the igniter main body, and

the annular holding plate of the resin portion is positioned between the first reduced diameter portion and the second reduced diameter portion.

11. The apparatus provided with an igniter assembly according to claim 7, a sealing member is inserted between the second reduced diameter portion of the igniter collar and the concave portion of the resin portion.

12. The apparatus provided with an igniter assembly according to claim 7, wherein the housing is formed 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 the second reduced diameter portion of the igniter collar, based on the flat bottom surface of the closure shell, satisfy the relationship h₂>

h₁.