JPH10170197A - Insensitive squib - Google Patents

Insensitive squib

Info

Publication number
JPH10170197A
JPH10170197A JP32293196A JP32293196A JPH10170197A JP H10170197 A JPH10170197 A JP H10170197A JP 32293196 A JP32293196 A JP 32293196A JP 32293196 A JP32293196 A JP 32293196A JP H10170197 A JPH10170197 A JP H10170197A
Authority
JP
Japan
Prior art keywords
insensitive
squib
heating element
explosive
pair
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.)
Pending
Application number
JP32293196A
Other languages
Japanese (ja)
Inventor
Naoko Tajima
なお子 田島
Masashi Watanabe
将史 渡辺
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nichiyu Giken Kogyo Co Ltd
Original Assignee
Nichiyu Giken Kogyo Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nichiyu Giken Kogyo Co Ltd filed Critical Nichiyu Giken Kogyo Co Ltd
Priority to JP32293196A priority Critical patent/JPH10170197A/en
Publication of JPH10170197A publication Critical patent/JPH10170197A/en
Pending legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To provide an insensitive squib which eliminates the need for skilled work in production with simultaneous operability and moreover, achieve higher safety with easier maintenance control by enabling series connection of a plurality of units with a smaller power source without malfunctioning. SOLUTION: This insensitive squib 10 has a metal cylinder 4 filled with a powder 5, an insulating body 2 which is fitted into the metal cylinder 4 and pierced by a pair of electrode conductors 3 and a heating body 1 comprising a thick film resistance provided at a bridging position of the pair of electrode conductors 3 on the surface of the insulating body 2 in contact with the powder 5. The resistance value of the heating body 1 is preferably 0.5-2.0Ω.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、例えば爆薬や燃料
に点火するための鈍感型スクイブに関するものである。
The present invention relates to an insensitive squib for igniting explosives or fuel, for example.

【0002】[0002]

【従来の技術】鈍感型スクイブは、エアバッグのガス発
生器内の燃焼剤やロケットの固体燃料を点火するための
点火装置の着火に用いられる装置であり、設定された電
流値よりも高い電流を流さない限り、雷や静電気などの
外来ノイズにより点火系ケーブルに誘導電流が発生して
も誤作動することがない。エアバッグの作動やロケット
固体燃料の着火は確実に行われなければならないため、
鈍感型スクイブは複数個連結して用いられることがあ
る。
2. Description of the Related Art An insensitive squib is a device used for igniting an ignition device for igniting a combustion agent in a gas generator of an air bag or solid fuel of a rocket, and a current higher than a set current value. As long as no induced current is generated in the ignition system cable due to external noise such as lightning or static electricity, malfunction does not occur. Airbag activation and rocket solid fuel ignition must be performed reliably,
A plurality of insensitive squibs may be used in combination.

【0003】従来の鈍感型スクイブ20は、図4に示す
ように、金属筒4の下端に絶縁体11が嵌められ、金属
筒4内部に鈍感な火薬5が充填され樹脂製の蓋6がされ
ている。絶縁体11には、対の電極ピン3が貫通しその
先端には電極ピン9が接合している。電極ピン9の先端
には直径数十μmのニクロム線12が溶接架橋され火薬
5に接触している。電極ピン3の他端は不図示の電源に
接続されている。
In a conventional insensitive squib 20, as shown in FIG. 4, an insulator 11 is fitted to the lower end of a metal tube 4, an insensitive explosive 5 is filled in the metal tube 4, and a resin lid 6 is provided. ing. The pair of electrode pins 3 penetrates through the insulator 11, and the electrode pins 9 are joined to the ends thereof. A nichrome wire 12 having a diameter of several tens of μm is welded and crosslinked to the tip of the electrode pin 9 and is in contact with the explosive 5. The other end of the electrode pin 3 is connected to a power source (not shown).

【0004】この鈍感型スクイブ20は以下のように動
作する。電極ピン3に一定値以上の電流を流すとニクロ
ム線12が発熱し、火薬5の燃焼温度に達するとニクロ
ム線12周囲の火薬5から燃焼して発火する。特開昭6
1−83697号公報には、鈍感な火薬5としてジルコ
ニウム、タンタル、ニオブなどの金属の粒子と酸化剤と
の混成体を使用した鈍感型スクイブが開示されている。
The insensitive squib 20 operates as follows. When a current of a predetermined value or more is applied to the electrode pin 3, the nichrome wire 12 generates heat. When the combustion temperature of the explosive 5 is reached, the explosive 5 around the nichrome wire 12 burns and ignites. JP 6
Japanese Patent Application Publication No. 1-83697 discloses an insensitive squib using, as the insensitive explosive 5, a hybrid of particles of a metal such as zirconium, tantalum, or niobium and an oxidizing agent.

【0005】[0005]

【発明が解決しようとする課題】しかしながら、このよ
うな鈍感型スクイブ20は、発火時の衝撃でニクロム線
12が電極ピン9から外れたり、切断してしまうことが
あった。このため直列に接続してあると複数個同時に作
動させることができず、斉発させるには並列に接続しな
ければならないので、大きな電流を流さねばならず、大
型の電源が必要であった。またニクロム線12を電極ピ
ン9に溶接するには、熟練作業者の技術か必要であっ
た。さらに、鈍感型スクイブ20に斉発性を付与するた
めには、火薬5として低温でも発火する敏感な火薬を用
いる必要があり、保守管理に危険を伴い安全性が低かっ
た。
However, in such an insensitive squib 20, the nichrome wire 12 may come off from the electrode pin 9 or be cut off by a shock at the time of ignition. For this reason, if they are connected in series, they cannot be operated at the same time, and they must be connected in parallel for simultaneous operation, so that a large current must flow and a large power supply is required. In addition, in order to weld the nichrome wire 12 to the electrode pin 9, the skill of a skilled worker was required. Furthermore, in order to give the insensitive type squib 20 a spontaneous property, it is necessary to use a sensitive explosive that ignites even at a low temperature as the explosive 5, which involves danger in maintenance and lowers safety.

【0006】本発明は前記の課題を解決するためなされ
たもので、雷や静電気などによって誤作動することが無
く、小型の電源で複数個を直列接続でき、斉発性を有
し、製造に熟練作業が必要なく、しかも保守管理が容易
で安全性が高い鈍感型スクイブを提供することを目的と
する。
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and does not malfunction due to lightning or static electricity, can connect a plurality of power supplies in series with a small power supply, has a responsive property, and An object of the present invention is to provide an insensitive squib that requires no skilled work, is easy to maintain, and has high safety.

【0007】[0007]

【課題を解決するための手段】前記の目的を達成するた
めになされた本発明の鈍感型スクイブ10は、図1に示
すように、火薬5が充填された金属筒4と、金属筒4に
嵌められ対の電極導体3が貫通した絶縁体2と、火薬5
に接触し絶縁体2の表面で前記対の電極導体3の架橋位
置に設けられた厚膜抵抗からなる発熱体1とを有する。
The insensitive type squib 10 of the present invention, which has been made to achieve the above object, comprises a metal cylinder 4 filled with an explosive 5 and a metal cylinder 4 as shown in FIG. An insulator 2 fitted with a pair of electrode conductors 3 penetrating therethrough;
And a heating element 1 made of a thick-film resistor and provided on the surface of the insulator 2 at the cross-linking position of the pair of electrode conductors 3.

【0008】発熱体1の抵抗値は、0.5〜2.0Ωで
あることが好ましい。抵抗値が0.5Ω以下だと鈍感型
スクイブ10の発火に時間がかかってしまい斉発性も得
られない。また2.0Ω以上だと雷や静電気などの微量
な電流によって発火してしまうことがある。
The resistance value of the heating element 1 is preferably 0.5 to 2.0Ω. When the resistance value is 0.5Ω or less, it takes a long time for the insensitive squib 10 to ignite, and no simultaneous squib is obtained. If it is 2.0 Ω or more, it may be ignited by a small amount of current such as lightning or static electricity.

【0009】発熱体1の材質は、酸化ルテニウムまたは
/および酸化ケイ素と、金、銀、銅、ニッケル、クロ
ム、鉄、アルミニウムの中から選ばれる少なくとも一種
類との混合物からなることが好ましい。
The material of the heating element 1 is preferably composed of a mixture of ruthenium oxide and / or silicon oxide and at least one selected from gold, silver, copper, nickel, chromium, iron and aluminum.

【0010】鈍感型スクイブ10は、発熱体1を厚膜抵
抗体とすることにより、斉発性を具備させていることが
好ましい。
It is preferable that the insensitive squib 10 is provided with a spontaneous property by using the heating element 1 as a thick film resistor.

【0011】発熱体1の形状は、電極導体3に完全に接
触する形状であれば良く、例えば図2に示す長方形や、
図3に示す長方形の中心部がくびれた形状のものが挙げ
られる。
The shape of the heating element 1 may be any shape as long as it is in complete contact with the electrode conductor 3. For example, a rectangular shape shown in FIG.
A rectangular shape shown in FIG.

【0012】火薬5は、発火温度が200℃以上の耐熱
性が高く鈍感なもの、例えばトリシネート系、アジ化鉛
が挙げられる。
The explosive 5 includes a highly heat-resistant and insensitive substance having an ignition temperature of 200 ° C. or higher, such as tricinate and lead azide.

【0013】[0013]

【発明の実施の形態】以下、本発明の実施例を詳細に説
明する。図1は、本発明を適用する鈍感型スクイブ10
の実施例を示す断面図である。同図に示すように、鈍感
型スクイブ10はトリシネート系の火薬5が充填された
金属筒4の下端にセラミックス製の絶縁体2が嵌めら
れ、金属筒4の上端には樹脂製の蓋6が嵌められてい
る。絶縁体2には対の電極ピン3が貫通しその先端に
は、材質が酸化ルテニウム、酸化ケイ素および銀の混合
物で抵抗値が0.8〜2.0Ωの厚膜抵抗の発熱体1が
架橋し、火薬5に接触している。発熱体1の形状は図2
に示す長方形である。電極ピン3の他端は不図示の電源
に接続されている。
DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail. FIG. 1 shows an insensitive squib 10 to which the present invention is applied.
It is sectional drawing which shows Example of (a). As shown in the figure, the insensitive squib 10 has a ceramic insulator 2 fitted on the lower end of a metal tube 4 filled with a tricinate explosive 5, and a resin lid 6 on the upper end of the metal tube 4. It is fitted. A pair of electrode pins 3 penetrate the insulator 2, and a heating element 1 having a thickness of 0.8 to 2.0 Ω, made of a mixture of ruthenium oxide, silicon oxide and silver and having a resistance value of 0.8 to 2.0 Ω, is bridged to the tip of the electrode pin 3. And is in contact with gunpowder 5. The shape of the heating element 1 is shown in FIG.
It is a rectangle shown in FIG. The other end of the electrode pin 3 is connected to a power source (not shown).

【0014】鈍感型スクイブ10は以下のように製造さ
れる。まず成型時にピンホールが開けられたセラミック
ス製の絶縁体2に対の電極ピン3を貫通させ、対の電極
ピン3を架橋するように厚膜抵抗の発熱体1を印刷す
る。次に金属筒4に蓋6を嵌めて火薬5を充填させた後
に、火薬5に発熱体1を接触するように絶縁体2を嵌め
る。
The insensitive squib 10 is manufactured as follows. First, a pair of electrode pins 3 is penetrated through a ceramic insulator 2 having a pinhole formed during molding, and a thick-film resistance heating element 1 is printed so as to bridge the pair of electrode pins 3. Next, after the lid 6 is fitted to the metal cylinder 4 and the explosive 5 is filled, the insulator 2 is fitted so that the heating element 1 contacts the explosive 5.

【0015】鈍感型スクイブ10は以下のように動作す
る。電極ピン3に電流を流して発熱体1を発熱させ、発
熱体1の温度が火薬5の発火温度に達すると、発熱体1
の周囲の火薬5から燃焼して発火する。
The insensitive squib 10 operates as follows. A current is applied to the electrode pins 3 to cause the heating element 1 to generate heat. When the temperature of the heating element 1 reaches the ignition temperature of the explosive 5, the heating element 1
It burns from the explosive 5 around it and ignites.

【0016】この鈍感型スクイブ10の発熱体1とし
て、抵抗値が0.8Ω、1.1Ω、1.5Ωおよび2.
0Ωのものを使用し、それぞれの抵抗値の発熱体1に3
ミリ秒電流を流したときの鈍感型スクイブ10が発火し
た電流値である発火電流を測定した。その結果を表1に
示す。
The heating element 1 of the insensitive squib 10 has resistance values of 0.8Ω, 1.1Ω, 1.5Ω and 2.
Use a 0 Ω resistor and add 3
The ignition current, which is the current value at which the insensitive squib 10 fired when a millisecond current was passed, was measured. Table 1 shows the results.

【0017】[0017]

【表1】 [Table 1]

【0018】同表に示したように、発熱体1の抵抗値が
2.0以下の鈍感型スクイブ10は、1.0A以上の電
流が流れないと発火することはない。
As shown in the table, the insensitive squib 10 in which the resistance of the heating element 1 is 2.0 or less does not ignite unless a current of 1.0 A or more flows.

【0019】次に、抵抗値が0.8、1.1、1.5Ω
の鈍感型スクイブ10を10個直列接続し、それぞれ
5、3、2Aの電流を流したところ、10個全てが同時
に発火し、直列接続して使用可能なことが確認できた。
Next, when the resistance value is 0.8, 1.1, 1.5Ω
When 10 insensitive type squibs 10 were connected in series and currents of 5, 3, and 2 A were respectively passed, it was confirmed that all 10 ignited at the same time and were usable in series connection.

【0020】比較のため、図4に示す発熱体がニクロム
線である従来の鈍感型スクイブ20において、火薬5と
してジルコニウム/過塩素酸カリウム混合物(バインダ
はフッ素ゴム)を使用したものを、2個直列に連結し
5.0Aの電流を流して発火させた。その結果1個目の
鈍感型スクイブ20は発火したが、2個目は発火しなか
った。
For comparison, in the conventional insensitive type squib 20 shown in FIG. 4 in which the heating element is a nichrome wire, two samples using a zirconium / potassium perchlorate mixture (fluorine rubber binder) as the explosive 5 were used. They were connected in series and ignited by applying a current of 5.0 A. As a result, the first insensitive squib 20 fired, but the second did not.

【0021】[0021]

【発明の効果】以上、詳細に説明したように本発明の鈍
感型スクイブは、発熱体を厚膜抵抗としたため、小型の
電源で複数個を直列接続して確実に発火させることがで
き、斉発性を有している。比較的鈍感な耐熱性のある火
薬を使用することができるため、雷や静電気などによっ
て誤作動することが無く、安全性も高く保守管理が容易
である。また製造に熟練作業が必要なく、大量生産でき
るため安価に提供できる。
As described above in detail, the insensitive squib of the present invention has a thick-film resistance heating element, so that a small number of power supplies can be connected in series and reliably fired. It has spontaneous nature. Since a relatively insensitive explosive with heat resistance can be used, it does not malfunction due to lightning or static electricity, and is highly safe and easy to maintain. In addition, since there is no need for skilled work for production and mass production is possible, it can be provided at low cost.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明を適用する鈍感型スクイブの実施例を示
す断面図である。
FIG. 1 is a sectional view showing an embodiment of an insensitive squib to which the present invention is applied.

【図2】本発明を適用する鈍感型スクイブの実施例の一
部品を示す正面図である。
FIG. 2 is a front view showing one part of an embodiment of an insensitive squib to which the present invention is applied.

【図3】本発明を適用する鈍感型スクイブの実施例の別
の一部品を示す正面図である。
FIG. 3 is a front view showing another part of the embodiment of the insensitive squib to which the present invention is applied.

【図4】従来の鈍感型スクイブの実施例を示す断面図で
ある。
FIG. 4 is a sectional view showing an example of a conventional insensitive squib.

【符号の説明】[Explanation of symbols]

1・8は発熱体、2・11は絶縁体、3・9は電極ピ
ン、4は金属筒、5は火薬、6は蓋、10・20は鈍感
型スクイブ、12はニクロム線である。
Reference numerals 1 and 8 denote heating elements, 2 and 11 insulators, 3 and 9 electrode pins, 4 a metal cylinder, 5 gunpowder, 6 a lid, 10 and 20 an insensitive squib, and 12 a nichrome wire.

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 火薬が充填された金属筒と、該金属筒に
嵌められ対の電極導体が貫通した絶縁体と、該火薬に接
触し該絶縁体の表面で前記対の電極導体の架橋位置に設
けられた厚膜抵抗からなる発熱体とを有することを特徴
とする鈍感型スクイブ。
1. A metal tube filled with explosive, an insulator fitted to the metal tube and having a pair of electrode conductors penetrated, and a bridging position of the pair of electrode conductors on the surface of the insulator which is in contact with the explosive. And a heating element comprising a thick film resistor provided in the squib.
【請求項2】 前記発熱体の抵抗値が0.5〜2.0Ω
であることを特徴とする請求項1に記載の鈍感型スクイ
ブ。
2. The heating element has a resistance of 0.5 to 2.0Ω.
The insensitive squib according to claim 1, wherein:
【請求項3】 前記発熱体の材質が、酸化ルテニウムま
たは/および酸化ケイ素と、金、銀、銅、ニッケル、ク
ロム、鉄、アルミニウムの中から選ばれる少なくとも一
種類との混合物からなることを特徴とする請求項1に記
載の鈍感型スクイブ。
3. The heating element is made of a mixture of ruthenium oxide and / or silicon oxide and at least one selected from gold, silver, copper, nickel, chromium, iron and aluminum. The insensitive squib according to claim 1.
【請求項4】 前記発熱体を厚膜抵抗体とすることによ
り、斉発性を具備させたことを特徴とする請求項1に記
載の鈍感型スクイブ。
4. The insensitive squib according to claim 1, wherein the heating element is made of a thick-film resistor so as to have resilience.
JP32293196A 1996-12-03 1996-12-03 Insensitive squib Pending JPH10170197A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP32293196A JPH10170197A (en) 1996-12-03 1996-12-03 Insensitive squib

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP32293196A JPH10170197A (en) 1996-12-03 1996-12-03 Insensitive squib

Publications (1)

Publication Number Publication Date
JPH10170197A true JPH10170197A (en) 1998-06-26

Family

ID=18149238

Family Applications (1)

Application Number Title Priority Date Filing Date
JP32293196A Pending JPH10170197A (en) 1996-12-03 1996-12-03 Insensitive squib

Country Status (1)

Country Link
JP (1) JPH10170197A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018020780A (en) * 2012-05-16 2018-02-08 ティーアールダブリュー・エアバッグ・システムズ・ゲーエムベーハー Igniter and method of manufacturing igniter for inflator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018020780A (en) * 2012-05-16 2018-02-08 ティーアールダブリュー・エアバッグ・システムズ・ゲーエムベーハー Igniter and method of manufacturing igniter for inflator

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