Support structure of closing member for gas generator and gas generator using same

Patent metadata

Field	Value
Publication number	US-10308211-B2
Application number	US-201615541629-A
Country	US
Kind code	B2
Filing date	Jan 6, 2016
Priority date	Jan 27, 2015
Publication date	Jun 4, 2019
Grant date	Jun 4, 2019

Abstract

A support structure of a closing member for a gas generator including a cylindrical housing accommodating an ignition device and an inflating gas source chamber is provided. The support structure includes a combination of a closing member closing a gas discharge path and a support member supporting the closing member and is arranged inside the cylindrical housing. The support member includes a base and a convex first support part extending in one direction from a center portion of the base, and a gas passage hole in at least one of the base and the convex first support part. The closing member, having a plate shape with first and second surfaces, is supported from one surface by a distal end surface of the convex first support part abutting against a center portion of the first or second surfaces, and has an annular surface not abutted by the convex first support part.

First claim

The invention claimed is:

1. A support structure of a closing member for a gas generator, being arranged in the gas generator which includes a cylindrical housing provided with a gas discharge port, the cylindrical housing accommodating therein an ignition device and having an inflating gas source chamber filled with an inflating gas source,
the support structure comprising:
a combination of the closing member for closing a gas discharge path and a support member of the closing member to be arranged inside the cylindrical housing,
the support member including a base and a convex first support part which extends in one direction from a center portion of the base, and further including a gas passage hole in at least one of the base and the convex first support part, a distal end surface of the convex first support part opposing the closing member being a flat surface and in contact with at least a center of the closing member,
the closing member having a plate shape with a first surface and a second surface,
the closing member being supported from one surface by a distal end surface of the convex first support part which abuts against a center portion of the first surface or the second surface, and the closing member which has an annular surface not abutted by the convex first support part,
the closing member being opened as the annular surface of the closing member is ruptured.

2. A support structure of a closing member for a gas generator, being arranged in the gas generator which includes a cylindrical housing provided with a gas discharge port, the cylindrical housing accommodating therein an ignition device and having an inflating gas source chamber filled with an inflating gas source,
the support structure comprising:
a combination of the closing member for closing a gas discharge path and a support member of the closing member to be arranged inside the cylindrical housing,
the support member including a base, a convex first support part which extends in one direction from a center portion of the base, and an annular second support part which extends in a same direction as the first support part from a circumference of the base, and further including a gas passage hole in at least one of the base, the convex first support part and the annular second support part, a distal end surface of the convex first support part opposing the closing member being a flat surface and in contact with at least a center of the closing member,
the closing member having a plate shape with a first surface and a second surface,
the closing member being supported from one surface by a distal end surface of the convex first support part which abuts against a center portion of the first surface or the second surface, and the annular second support part of the support member which abuts against an outer circumferential edge portion on the side of the supported surface, and the closing member having an annular surface not abutted by the convex first support part and the annular second support part,
the closing member being opened as the annular surface of the closing member is ruptured.

3. The support structure of a closing member for a gas generator according to claim 1 , wherein the plate-shaped closing member has a bottom surface portion and a circumferential wall portion which extends in one direction from an outer circumference of the bottom surface portion, and the bottom surface portion on a side enclosed by the circumferential wall portion is a first surface and the back surface thereof is a second surface.

4. The support structure of a closing member for a gas generator according to claim 1 , wherein the annular surface not abutted by the convex first support part has an annular fragile portion.

5. The support structure of a closing member for a gas generator according to claim 1 , wherein the annular surface not abutted by the convex first support part has an annular fragile portion and further has a plurality of fragile portions which are radially formed so as to traverse the annular fragile portion.

6. A gas generator, comprising:
a cylindrical housing having a first end which is attached with an ignition device and a second end which is on an opposite side from the first end and is attached with a diffuser portion with a gas discharge port;
a combustion chamber being filled with a gas generating agent and arranged on the side of the ignition device;
a pressurized gas chamber being filled with a pressurized gas as an inflating gas source and arranged on the side of the diffuser portion;
at least one of a gas discharge path between the diffuser portion and the pressurized gas chamber, and a gas discharge path between the combustion chamber and the pressurized gas chamber being closed by the support structure of a closing member according to claim 1 including the combination of the closing member and the support member,
during actuation, the closing member being opened as the annular surface of the closing member is ruptured so that a gas is discharged from the gas passage hole.

7. A gas generator, comprising:
a cylindrical housing having a first end which is attached with an ignition device and a second end which is on an opposite side from the first end and is attached with a diffuser portion with a gas discharge port;
a combustion chamber being filled with a gas generating agent and arranged on the side of the ignition device;
a pressurized gas chamber being filled with a pressurized gas as an inflating gas source and arranged on the side of the diffuser portion;
a gas discharge path between the diffuser portion and the pressurized gas chamber being closed by the support structure of a closing member according to claim 2 including the combination of the closing member and the support member, the diffuser portion corresponding to the support member of a support structure of a closing member,
the diffuser portion including the base, the annular second support part which extends in one direction from a circumference of the base, and the convex first support part which extends in a same direction as the annular second support part from a center portion of the base, and the diffuser portion further including the gas discharge port in at least one of the annular second support part and the base in part where the annular second support part and the convex first support part are not formed,
the closing member being arranged such that a first surface is on the side of the pressurized gas chamber and a second surface is on the side of the diffuser portion,
the closing member being supported by the annular second support part of the diffuser portion which abuts against an outer circumferential edge portion on the second surface of the closing member and a distal end surface of the first support part of the diffuser portion which abuts against a center portion on the second surface of the closing member, and the closing member including an annular surface not abutted by the annular second support part and the convex first support part,
during actuation, the closing member being annularly opened as the annular surface of the closing member is ruptured so that a gas is discharged from the gas discharge port.

8. A gas generator, comprising:
a cylindrical housing having a first end which is attached with an ignition device and a second end which is on an opposite side from the first end and is attached with a diffuser portion with a gas discharge port;
a combustion chamber being filled with a gas generating agent and arranged on the side of the ignition device;
a pressurized gas chamber being filled with a pressurized gas as an inflating gas source and arranged on the side of the diffuser portion;
a gas discharge path between the combustion chamber and the

Assignees

• Daicel Corp

Inventors

• Kobayashi Tomoharu

Classifications

• B60R21/272 Primary

  with means for increasing the pressure of the gas just before or during liberation, e.g. hybrid inflators · CPC title

• B60R21/274 Primary

  characterised by means to rupture or open the fluid source · CPC title

• B01J7/00

  Apparatus for generating gases (production of inert gas mixtures B01J19/14; for generating specific gases, see the relevant subclasses, e.g. C01B, C10J {; in "air bags" on vehicles B60R21/26; for starter gas F02C7/26; blasting cartridges for producing gas under pressure F42B3/04}) · CPC title

• B60R21/2346

  Soft diffusers · CPC title