GAS GENERATOR

• US 20130276663A1
• Filed: 01/06/2012
• Published: 10/24/2013
• Est. Priority Date: 01/07/2011
• Status: Abandoned Application

• Current Assignee: Nippon Kayaku Company Limited
• Original Assignee: Nippon Kayaku Company Limited
• Inventors: Ohsugi, Satoshi, Mukunoki, Hirotaka, Tanaka, Yusuke, Kim, Jin Han
• Application Number:
  US13/978,474
• Publication Number:
  US 20130276663A1
• Time in Patent Office: Days
• US Class Current: 102/530
• CPC Class Codes: B60R 2021/2648 comprising a plurality of combustion chambers or sub-chambers
• CPC Class Codes: B60R 21/2644 using only solid reacting substances, e.g. pellets, powder
• CPC Class Codes: C06D 5/00 Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets explosive compositions containing an oxidizer, fuels for rocket engines intended for reaction with an oxidant other than air C06B

Abstract

A gas generator (1A) includes a lower shell (10), an upper shell (20), a holding portion (30), an igniter (40), an enhancer cup (46), and a filter (70). The lower shell (10) is made of a press-formed product formed by press-working one plate-shaped member made of metal, and includes a protruding cylindrical portion (13) and an opening (15) provided in the protruding cylindrical portion (13). The holding portion (13) is made of a resin-molded portion formed by attaching an insulating fluid resin material to a bottom plate portion (11) so as to reach a part of an outer surface from a part of an inner surface of the bottom plate portion (11) of the lower shell (10) through the opening (15) and solidifying the same. The enhancer cup (46) is held by the holding portion (30) as an locking protruding portion (46a) provided in the enhancer cup (46) is locked to a locking recess portion (36a) provided in the holding portion (30).

Claims

1. A gas generator, comprising:

a short cylindrical housing which is constituted of a top plate portion (21) and a bottom plate portion (11) closing axial end portions and a circumferential wall portion (12, 22) provided with a gas discharge opening (23) and includes therein a combustion chamber (60) accommodating a gas generating agent (61);

an igniter (40) assembled to said bottom plate portion (11), for burning said gas generating agent (61);

a cylindrical cup-shaped member (46) with bottom containing an enhancer chamber (47) accommodating an enhancer agent (48) and arranged to protrude into said combustion chamber (60) so as to face said igniter (40); and

a holding portion (30) provided on said bottom plate portion (11), for holding said igniter (40),

said housing at least having a lower shell (10) including said bottom plate portion (11) and an upper shell (20) including said top plate portion (21),

said lower shell including a protruding cylindrical portion (13) provided to protrude toward said top plate portion (21) and an opening (15) provided at an axial end portion of said protruding cylindrical portion (13), which is located on a side of said top plate portion (21),

said holding portion (30) being formed from a resin-molded portion which is formed by attaching a fluid resin material to said bottom plate portion (11) so as to reach a part of an outer surface of said bottom plate portion (11) from a part of an inner surface of said bottom plate portion (11) through said opening (15) and solidifying the fluid resin material so that at least a part of the resin-molded portion is secured to said bottom plate portion (11),

one of said cup-shaped member (46) and said holding portion (30) being provided with a first locking portion,

the other of said cup-shaped member (46) and said holding portion (30) being provided with a first locked portion, and

said cup-shaped member (46) being held by said holding portion (30) by locking of said first locking portion to said first locked portion.

2. The gas generator according to claim 1, wherein

said cup-shaped member (46) is made of a resin.

3. The gas generator according to claim 1, wherein

said holding portion (30) includes a holding wall portion (34) having an annular shape in a portion opposed to said top plate portion (21), and

said cup-shaped member (46) is externally inserted in said holding wall portion (34) so that an outer circumferential surface of said holding wall portion (34) is in intimate contact with an inner circumferential surface of said cup-shaped member (46) and said first locking portion is locked to said first locked portion.

4. The gas generator according to claim 1, wherein

said holding portion (30) includes a fitting projection portion (34a) having an annular shape in a portion opposed to said top plate portion (21),

said cup-shaped member (46) includes a fitting recess portion (46c) having an annular shape in a portion opposed to a side of said bottom plate portion (11), and

said fitting projection portion (34a) is inserted in said fitting recess portion (46c) so that an outer circumferential surface and an inner circumferential surface of said fitting projection portion (34a) are in intimate contact with a surface of said fitting recess portion (46c) and said first locking portion is locked to said first locked portion.

5. The gas generator according to claim 1, wherein

said first locking portion has a groove portion extending along a circumferential direction, in a portion on a main surface on a side locked to said first locked portion, which corresponds to a root of said first locking portion.

6. The gas generator according to claim 1, wherein

said holding portion (30) includes an accommodation recess portion (37) for accommodating said igniter (40) in a portion opposed to said top plate portion (21), and

said igniter (40) is held by said holding portion (30) while it is inserted in said accommodation recess portion (37) from a side of said top plate portion (21) and fitted therein.

7. The gas generator according to claim 1, wherein

one of said igniter (40) and said holding portion (30) is provided with a second locking portion,

the other of said igniter (40) and said holding portion (30) is provided with a second locked portion, and

said igniter (40) is held by said holding portion (30) by locking of said second locking portion to said second locked portion.

8. The gas generator according to claim 7, wherein

said second locking portion has a groove portion extending along a circumferential direction, in a portion on a main surface on a side locked to said second locked portion, which corresponds to a root of said second locking portion.

9. The gas generator according to claim 7, wherein

a through hole provided in said holding portion (30) commonly serves as said first locked portion and said second locked portion.