JPH05246298A - Gas generator for air bag - Google Patents
Gas generator for air bagInfo
- Publication number
- JPH05246298A JPH05246298A JP4046662A JP4666292A JPH05246298A JP H05246298 A JPH05246298 A JP H05246298A JP 4046662 A JP4046662 A JP 4046662A JP 4666292 A JP4666292 A JP 4666292A JP H05246298 A JPH05246298 A JP H05246298A
- Authority
- JP
- Japan
- Prior art keywords
- igniter
- gas generator
- gas
- container
- retaining ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Landscapes
- Air Bags (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、例えば自動車等におい
て衝突等の事故発生時に作動して乗員を衝撃より保護す
るエアバッグのガス発生器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas generator for an air bag which is activated when an accident such as a collision occurs in an automobile or the like to protect an occupant from an impact.
【0002】[0002]
【従来の技術】エアバッグ装置のガス発生器は、主に上
容器、下容器、フィルター、ガス発生剤、イグナイター
部から構成されている。ガス発生器は、バッグを短時間
に展開させる必要があるため、運転席には30〜100
リットル、助手席には150〜200リットル程度のガ
ス発生が必要である。また前述のようなガス発生を短時
間に完了させるためには発生器内のガス発生剤の燃焼速
度を大きくすることが必要であり、そのためにガス発生
器を高圧に耐えるように設計されている。このため上容
器と下容器は強固に溶接されている。しかし溶接は容器
自体が高温になるため、安全上イグナイター部を外した
状態で行ない、その後にイグナイター部を取り付ける方
法が製造上好ましく、イグナイター部をかん着した例が
特公昭52−17619号公報に開示されている。また
イグナイターにネジを設けた保持具を付け、溶接後の容
器にねじ込む方法が USP 4316874に記載さ
れている。通常イグナイターへの点火は電気で行ない、
通電用の点火線はコネクター装着用のピンタイプと引き
回し可能なピッグテールタイプがある。2. Description of the Related Art A gas generator of an air bag device is mainly composed of an upper container, a lower container, a filter, a gas generating agent and an igniter section. Since the gas generator needs to deploy the bag in a short time, 30 to 100
It is necessary to generate about 150 to 200 liters of gas for each liter and passenger seat. Further, in order to complete the gas generation as described above in a short time, it is necessary to increase the burning rate of the gas generating agent in the generator, and therefore the gas generator is designed to withstand high pressure. . Therefore, the upper container and the lower container are firmly welded. However, since the temperature of the container itself becomes high during welding, it is preferable to perform the welding with the igniter part removed, and then attach the igniter part from the viewpoint of manufacturing. It is disclosed. Further, USP 4316874 describes a method of attaching a holder provided with a screw to an igniter and screwing it into a container after welding. Ignition to the igniter is usually done by electricity,
There are two types of ignition wires for energizing, a pin type for attaching a connector and a pigtail type that can be drawn around.
【0003】[0003]
【発明が解決しようとする課題】イグナイター保持具と
容器との取り付けがネジ式では、ネジの精度によっては
はめ込み不良及びネジのゆるみが生じ、ガス発生剤の燃
焼時に外れてガスがもれる恐れがあり、また、ネジが完
全に最後まで締まったかの確認も困難である。特に母材
としてアルミ等の軽量金属を用いた場合はネジの損傷が
起こりやすく信頼性に乏しい。更に点火線がピンタイプ
の場合、ピンの位置を一定位置に合わせることも容易で
ない。また押し込みかん着方式ではイグナイターの安全
上挿入力を下げようとすると強度的に問題がある。本発
明は、同心止め輪を用いた構造のイグナイターにより前
記問題点を解消したガス発生器を提供することにある。If the igniter holder and the container are screwed together, a fitting failure and a looseness of the screw may occur depending on the precision of the screw, and the gas may come off during the combustion of the gas generating agent to leak gas. Yes, and it is difficult to confirm that the screws are completely tightened. In particular, when a lightweight metal such as aluminum is used as the base material, the screws are likely to be damaged and reliability is poor. Further, when the ignition wire is a pin type, it is not easy to align the position of the pin with a fixed position. In addition, in the push-in method, there is a problem in strength when trying to reduce the insertion force for safety of the igniter. An object of the present invention is to provide a gas generator that solves the above problems by using an igniter having a structure using concentric snap rings.
【0004】[0004]
【課題を解決するための手段】すなわち、本発明はガス
発生器の容器と点火源であるイグナイター部を実質的に
結合してなるガス発生器において、ガス発生器の該容器
と該イグナイター部を止め輪によって結合、固定してあ
ることを特徴とするガス発生器である。That is, the present invention relates to a gas generator which is formed by substantially coupling an igniter portion which is an ignition source with a container of the gas generator, and the container of the gas generator and the igniter portion are connected to each other. The gas generator is characterized by being joined and fixed by a retaining ring.
【0005】[0005]
【作用】本発明でガス発生器は、止め輪構造の固定手段
を付加したイグナイターを押し込むだけでイグナイター
の装着と固定することができる。又、イグナイターユニ
ットに簡素な構造の止め輪構造の固定手段を付加したの
で、イグナイターユニットの装着することによりネジ式
の固定手段のように緩みがなく、分解防止のためのネジ
ロックと同様の機能を有するガス発生器を簡単に組立て
ることができる。According to the present invention, the gas generator can be attached and fixed to the igniter simply by pushing in the igniter having a retaining ring structure fixing means. In addition, since the fixing means of the snap ring structure with a simple structure has been added to the igniter unit, by installing the igniter unit there is no looseness like the screw type fixing means, and it has the same function as a screw lock for disassembly prevention. The gas generator it has can be easily assembled.
【0006】[0006]
【実施例】次に本発明を図を用いて説明する。図1は、
本発明のガス発生器のピンタイプの一例を示すもので、
上容器1と下容器2とガス発生剤15、フィルター3と
イグナイター部5により構成される。ガス発生器は多数
のベレット状もしくはウエハー状のガス発生剤15が燃
焼室4に収納されており、該燃焼室4は隔壁16で区画
されている。この燃焼室4の中央にはガス発生剤を燃焼
させるためのイグナイター部5が配置されており、また
燃焼室4の外周に沿ってフィルター3が環状に配置され
ている。イグナイター部5はイグナイター10とイグナ
イター保持具13で構成されており、イグナイター室2
3内に収納されている。イグナイター10にはスクイブ
と着火薬(図には示していない)を含有している。The present invention will be described below with reference to the drawings. Figure 1
An example of the pin type of the gas generator of the present invention,
It is composed of an upper container 1 , a lower container 2 , a gas generating agent 15, a filter 3 and an igniter section 5 . In the gas generator, a large number of beret-shaped or wafer-shaped gas generating agents 15 are housed in the combustion chamber 4 , and the combustion chamber 4 is partitioned by partition walls 16. The center of the combustion chamber 4 are arranged igniter unit 5 for burning the gas generating agent, also a filter 3 along the outer periphery of the combustion chamber 4 are arranged annularly. The igniter section 5 is composed of an igniter 10 and an igniter holder 13, and the igniter chamber 2
It is stored in 3. The igniter 10 contains a squib and an ignition powder (not shown).
【0007】このようなガス発生器では、イグナイター
10の点火用ピン21に電気が通電されると、イグナイ
ター10内の着火薬が燃焼しイグナイター区画壁22に
あけられた連結孔14を通って着火薬の熱粒子または熱
ガスを燃焼室4に伝える。この火災によりガス発生剤1
5が燃焼し、その際発生するガスと燃焼残渣が隔壁16
に設けられた隔壁孔17を通って燃焼室4の外周に配置
されているフィルター3で濾過されガス流出口18を通
りエアバッグ内(図には示していない)に流入する。ガ
ス発生剤が燃焼する際は燃焼室内が高圧になるため、ガ
ス発生器の上容器1と下容器2は、19と20の部分で
強固に溶接されている。In such a gas generator, when electricity is applied to the ignition pin 21 of the igniter 10, the igniting agent in the igniter 10 burns and passes through the connecting hole 14 formed in the igniter partition wall 22 to be attached. The heat particles or the hot gas of the explosive are transmitted to the combustion chamber 4 . Gas generator 1 by this fire
5 is burned, and the gas and combustion residue generated at that time are separated by the partition wall 16
The gas is filtered by the filter 3 arranged on the outer periphery of the combustion chamber 4 through the partition wall hole 17 provided in the above, and flows into the airbag (not shown) through the gas outlet port 18. Since the pressure inside the combustion chamber becomes high when the gas generating agent burns, the upper container 1 and the lower container 2 of the gas generator are firmly welded at the portions 19 and 20.
【0008】イグナイター保持具13は、図3に示す様
にある一定の強度を持つ台座41を設け止め輪12によ
り容器に固定される。止め輪の材質は、綱等の強固な物
が良く、例えばみがき特殊帯綱及び硬鋼線材が良い。止
め輪としてはC型止め輪、E型止め輪、グリップ止め
輪、C型同心止め輪が良く、特にC型同心止め輪(JI
S B2806)が取り外しが容易でなく良好である。The igniter holder 13 is provided with a pedestal 41 having a certain strength as shown in FIG. 3, and is fixed to the container by a retaining ring 12. The material of the retaining ring is preferably a strong material such as a rope, and for example, a brushed special rope or a hard steel wire rod is preferable. As the retaining ring, a C-type retaining ring, an E-type retaining ring, a grip retaining ring, and a C-type concentric retaining ring are preferable, and particularly, a C-type concentric retaining ring (JI
S B2806) is not easy to remove and is good.
【0009】容器側は図2の様にイグナイター区画壁2
2には、必要に応じてテーパ32を付け、保持具が挿入
された時の保持具が固定できる位置に溝31を設ける。
なおイグナイター10には、燃焼室内への水分の侵入を
防ぐための環境シール用の溝40を設けOリング11を
取り付けることもできる。この様な止め輪と共にイグナ
イター部5を容器のイグナイター区画壁22内に押し込
むと、止め輪がテーパ32の部分で徐々に内側に押し縮
まれイグナイター区画壁22の溝31の部分で音をたて
て止め輪が広がり、イグナイター部はガス発生器に固定
される。更に環境シールのためのOリングによって燃焼
室への水分の侵入を防ぐ。このOリングの位置は、イグ
ナイターの一部に限られるものではなく保持具に取り付
けても良い。またOリングがイグナイター部挿入時に傷
つかない様に止め輪の挿入部はOリング挿入部より径を
大きく取ることが有効である。更に止め輪の挿入位置は
保持具13の一部に付けることもできる。止め輪は容易
に取り外せない構造であれば良く例えば止め輪固定後溝
の一部をつぶしても良い。The container side is an igniter partition wall 2 as shown in FIG.
2 is provided with a taper 32 as needed, and a groove 31 is provided at a position where the holder can be fixed when the holder is inserted.
Note that the igniter 10 may be provided with a groove 40 for environmental sealing to prevent moisture from entering the combustion chamber, and the O-ring 11 may be attached thereto. When the igniter part 5 is pushed into the igniter partition wall 22 of the container together with such a retaining ring, the retaining ring is gradually compressed inward at the taper 32 and a sound is generated at the groove 31 of the igniter partition wall 22. The retaining ring spreads and the igniter part is fixed to the gas generator. Furthermore, an O-ring for environmental sealing prevents moisture from entering the combustion chamber. The position of the O-ring is not limited to a part of the igniter and may be attached to the holder. Further, it is effective that the insertion portion of the retaining ring has a larger diameter than the O-ring insertion portion so that the O-ring is not damaged when the igniter portion is inserted. Furthermore, the insertion position of the retaining ring can be attached to a part of the holder 13. The retaining ring may have a structure that cannot be easily removed, and for example, a part of the groove after fixing the retaining ring may be crushed.
【0010】[0010]
【発明の効果】本発明のガス発生器は、イグナイターの
固定保持に止め輪を用いているため取り付けもネジ式に
比べ短時間ででき、引き抜き強度も十分にある。また構
造も簡単で精度不良も起こりにくい。ネジ式の様に回転
させずに取り付けできるためイグナイターのピンの位置
合わせも容易である。更に、ガス発生器にネジの緩み防
止及びガス発生器の分解防止のためのネジロック等を付
加的に設ける必要はなくなる。Since the gas generator of the present invention uses the retaining ring for fixing and holding the igniter, the gas generator can be attached in a shorter time than the screw type and has sufficient pull-out strength. In addition, the structure is simple and accuracy is less likely to occur. Since it can be installed without rotating like the screw type, it is easy to position the igniter pin. Furthermore, it is not necessary to additionally provide a screw lock or the like on the gas generator to prevent loosening of the screw and disassembly of the gas generator.
【図1】本発明の実施例を示すガス発生器の断面図であ
る。FIG. 1 is a sectional view of a gas generator showing an embodiment of the present invention.
【図2】イグナイター部挿入前のガス発生器の構造を示
す断面図である。FIG. 2 is a sectional view showing a structure of a gas generator before insertion of an igniter portion.
【図3】イグナイターの構造を示す断面図である。FIG. 3 is a cross-sectional view showing the structure of an igniter.
【符号の説明】1 :上容器2 :下容器3 :フィルター4 :燃焼室5 :イグナイター部 10:イグナイター 11:Oリング 12:同心止め輪 13:イグナイター保持具 14:イグナイター区画壁連結孔 15:ガス発生剤 16:燃焼室隔壁 17:燃焼室隔壁孔 18:ガス流出口 19:上容器、下容器の溶接部 20:上容器、下容器の溶接部 21:イグナイター点火用ピン 22:イグナイター区画壁 23:イグナイター室 31:容器側同心止め輪用溝 32:イグナイター区画壁テーパ 40:Oリング用溝 41:同心止め輪用台座[Explanation of Codes] 1 : Upper container 2 : Lower container 3 : Filter 4 : Combustion chamber 5 : Igniter part 10: Igniter 11: O-ring 12: Concentric snap ring 13: Igniter retainer 14: Igniter partition wall connecting hole 15: Gas generating agent 16: Combustion chamber partition wall 17: Combustion chamber partition wall hole 18: Gas outflow port 19: Welded portion of upper container and lower container 20: Welded portion of upper container and lower container 21: Igniter ignition pin 22: Igniter partition wall 23: Igniter chamber 31: Groove for container side concentric snap ring 32: Taper for igniter partition wall 40: Groove for O ring 41: Pedestal for concentric snap ring
Claims (1)
イター部を実質的に結合してなるガス発生器において、
ガス発生器の該容器と該イグナイター部を止め輪によっ
て結合、固定してあることを特徴とするガス発生器。1. A gas generator comprising a container of a gas generator and an igniter portion, which is an ignition source, substantially connected to each other,
A gas generator characterized in that the container and the igniter portion of the gas generator are connected and fixed by a snap ring.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4046662A JPH05246298A (en) | 1992-03-04 | 1992-03-04 | Gas generator for air bag |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4046662A JPH05246298A (en) | 1992-03-04 | 1992-03-04 | Gas generator for air bag |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH05246298A true JPH05246298A (en) | 1993-09-24 |
Family
ID=12753556
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4046662A Withdrawn JPH05246298A (en) | 1992-03-04 | 1992-03-04 | Gas generator for air bag |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH05246298A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6409214B2 (en) | 1996-04-08 | 2002-06-25 | Daicel Chemical Industries, Ltd. | Airbag inflator and an airbag apparatus |
-
1992
- 1992-03-04 JP JP4046662A patent/JPH05246298A/en not_active Withdrawn
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6409214B2 (en) | 1996-04-08 | 2002-06-25 | Daicel Chemical Industries, Ltd. | Airbag inflator and an airbag apparatus |
US6695345B2 (en) | 1996-04-08 | 2004-02-24 | Daicel Chemical Industries, Ltd. | Airbag inflator and an airbag apparatus |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19990518 |