JPH073598Y2 - Constant voltage discharge tube for ignition device - Google Patents
Constant voltage discharge tube for ignition deviceInfo
- Publication number
- JPH073598Y2 JPH073598Y2 JP9234489U JP9234489U JPH073598Y2 JP H073598 Y2 JPH073598 Y2 JP H073598Y2 JP 9234489 U JP9234489 U JP 9234489U JP 9234489 U JP9234489 U JP 9234489U JP H073598 Y2 JPH073598 Y2 JP H073598Y2
- Authority
- JP
- Japan
- Prior art keywords
- discharge tube
- constant voltage
- ignition device
- voltage discharge
- tip
- 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.)
- Expired - Fee Related
Links
- 229910052751 metal Inorganic materials 0.000 claims description 22
- 239000002184 metal Substances 0.000 claims description 22
- 238000007789 sealing Methods 0.000 claims description 11
- 239000000843 powder Substances 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000011261 inert gas Substances 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 4
- 229910052750 molybdenum Inorganic materials 0.000 description 4
- 239000011733 molybdenum Substances 0.000 description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 4
- 229910052721 tungsten Inorganic materials 0.000 description 4
- 239000010937 tungsten Substances 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 229910052715 tantalum Inorganic materials 0.000 description 3
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000005394 sealing glass Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052754 neon Inorganic materials 0.000 description 1
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Ignition Installations For Internal Combustion Engines (AREA)
Description
【考案の詳細な説明】 産業上の利用分野 本考案は、内燃機関の点火装置において点火プラグと直
列接続して使用される定電圧放電管に関し、特に不活性
ガスが封入される中空円筒外囲器の両端開口を封塞する
金属封塞体に取りつけられる電極の構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a constant voltage discharge tube used in an ignition device for an internal combustion engine, which is connected in series with a spark plug, and more particularly to a hollow cylindrical envelope in which an inert gas is sealed. The present invention relates to a structure of an electrode attached to a metal sealing body that seals both end openings of a container.
従来の技術 此種放電管として、本出願人は、先に特願昭63-126654
号（実開平２−47794号公報）にて提案した。2. Description of the Related Art As a discharge tube of this type, the present applicant has previously proposed Japanese Patent Application No. 63-126654.
No. (Japanese Utility Model Publication No. 2-47794).
この出願のものは、第４図の縦断面図にしめすように、
セラミック等の絶縁材料の中空円筒外囲器１の両端開口
を封着ガラス６を使用して、電極11,12を取りつけた金
属封塞体2,3で封塞し、中空部７に不活性ガスを所定圧
封入してなる。The thing of this application is as shown in the longitudinal sectional view of FIG.
Both ends of the hollow cylindrical envelope 1 made of an insulating material such as ceramic are sealed with the metal sealing bodies 2 and 3 to which the electrodes 11 and 12 are attached by using the sealing glass 6, and the hollow portion 7 is inert. Gas is sealed at a predetermined pressure.
その電極11,12は、タングステン，タンタル，モリブデ
ン等の金属粉末を使用し、先端を半球状にプレス成型し
焼結したもので、その焼結電極を金属封塞体に溶着して
いる。The electrodes 11 and 12 are formed by using a metal powder such as tungsten, tantalum, molybdenum, etc., and press-molding the tips into a hemispherical shape and sintering, and the sintered electrodes are welded to a metal sealing body.
内燃機関の点火プラグの点火電圧は、10〜25kvに設定さ
れており、カーボンの付着によるくすぶり汚損を防止す
るには18Kv以上の高電圧が必要とされ、点火装置用の定
電圧放電管としても放電開始電圧の高いことが要求され
るが、この提案の放電管は、先端を半球状にすることに
より放電開始電圧を高くしている。The ignition voltage of the spark plug of the internal combustion engine is set to 10 to 25 kv, and a high voltage of 18 Kv or more is required to prevent smoldering stains due to carbon adhesion, and it can also be used as a constant voltage discharge tube for the ignition device. Although a high discharge starting voltage is required, the discharge tube of this proposal has a hemispherical tip to increase the discharge starting voltage.
考案が解決しようとする課題 先出願に係る定電圧放電管は、内燃機関の点火装置用と
して要求される放電開始電圧を高くすることについては
有効なものとなっているが、以下に述べる問題を有して
いる。Problems to be Solved by the Invention The constant voltage discharge tube according to the prior application is effective in increasing the discharge starting voltage required for the ignition device of the internal combustion engine, but has the following problems. Have
即ち、電極の先端を半球状にして金属粉末をプレス成型
しているが、成型品はプレスの強度が弱く、半球状の先
端部が、13の箇所で基部と分離し欠落することがあり、
電極の製造歩留りの悪化の原因となっている。That is, the tip of the electrode is hemispherical and the metal powder is press-molded, but the molded product has a weak press strength, and the hemispherical tip may separate from the base at 13 points and may be missing.
This is a cause of deterioration in manufacturing yield of electrodes.
又、仮に先端部が製造過程において欠落せずに完成品と
して定電圧放電管に組み込まれたとしても、先端部が欠
落するものが発生している以上、長期に亘る振動，衝撃
により先端部が欠落しないとも限らない。Even if the tip is not missing during the manufacturing process and is incorporated into the constant voltage discharge tube as a finished product, the tip may be missing, so that the tip may be damaged by vibration or impact for a long period of time. It doesn't have to be missing.
従って、本考案は係る問題点を解決した定電圧放電管を
提供するものである。Therefore, the present invention provides a constant voltage discharge tube that solves the above problems.
課題を解決するための手段 本考案の点火装置用定電圧放電管の両端開口を封塞する
金属封塞体に取りつけられる少なくとも一方の電極は、
金属粉末をプレス成型して焼結され、半球状の先端部
と、この先端部に連設した部分が前記先端部の底面積よ
りも大きい面積を有した基部とからなる。Means for Solving the Problems At least one electrode attached to a metal sealing body that seals both end openings of a constant voltage discharge tube for an ignition device of the present invention,
The metal powder is press-molded and sintered, and has a hemispherical tip portion, and a portion connected to the tip portion has a base portion having an area larger than the bottom area of the tip portion.
作用 先端部に連設した部分が先端部底面積よりも大きい面積
を有した基部を設けることにより、プレス成型時に先端
部にも基部にも押圧力が充分に加えられるので、プレス
成型品の強度を大きくすることができ、先端部の欠落を
無くすことができる。Action By providing a base with an area larger than the bottom area of the tip that is connected to the tip, sufficient pressing force is applied to both the tip and the base during press molding. Can be increased, and the loss of the tip can be eliminated.
実施例 第１図は、本考案の点火装置用定電圧放電管の実施例で
ある縦断面図であり、１はセラミック等の絶縁材料で作
られる中空円筒外囲器、2,3は中空円筒外囲器の両端開
口を封塞する金属封塞体、４はタングステン、モリブデ
ン、タンタル等の一種又は数種混合の金属粉末をプレス
成型し第１の金属封塞体２に取りつけられる第１の電
極、５はタングステン、モリブデン、タンタル等の１種
または、数種の合金の金属体である第２の電極、６は第
１、第２の金属封塞体2,3を中空円筒外囲器に溶着する
封着ガラス、７はアルゴン、ネオン、窒素、キセノン等
の一種又は複数混合した不活性ガスが所定圧封入される
中空部である。EXAMPLE FIG. 1 is a vertical sectional view showing an example of a constant voltage discharge tube for an ignition device according to the present invention, in which 1 is a hollow cylinder envelope made of an insulating material such as ceramic, and 2 and 3 are hollow cylinders. A metal sealer 4 for sealing the openings at both ends of the envelope is a first metal sealer 4 which is press-molded with a metal powder of one kind or a mixture of several kinds of tungsten, molybdenum, tantalum and the like and is attached to the first metal sealer 2. The electrode 5 is a second electrode which is a metal body of one or several kinds of alloys such as tungsten, molybdenum, tantalum, and the like, and 6 is a hollow cylindrical envelope in which the first and second metal sealing bodies 2 and 3 are enclosed. The sealing glass 7 is a hollow portion in which an inert gas containing argon, neon, nitrogen, xenon or the like or a mixture of plural gases is sealed at a predetermined pressure.
本考案の点火装置用定電圧放電管は以上の構成である
が、第１の電極４は第２図に示す形状となっており８は
半球状の先端部、９はこれに連設した円柱状の基部で、
先端部８と連設する部分は、同図（ロ）に示すように先
端部８の底面と同心円で且つ先端部８の底面積よりも大
きく、電極全体の外観は同図（ハ）に示す形状になって
いる。The constant voltage discharge tube for an ignition device of the present invention has the above-mentioned structure, but the first electrode 4 has the shape shown in FIG. 2, 8 is a hemispherical tip portion, and 9 is a circle connected to this. With a columnar base,
The portion connected to the tip 8 is concentric with the bottom surface of the tip 8 and larger than the bottom area of the tip 8 as shown in FIG. 8B, and the appearance of the entire electrode is shown in FIG. It has a shape.
本実施例においては、第１の電極４は第１の金属封塞体
２に直接溶着により取りつけているが、第３図に示すよ
うに、電極にタングステン、モリブデン等の金属体10を
とりつけ、この金属体10を金属封塞体２にとりつけるよ
うにしても良いし、又第２の電極５も第１の電極と同様
の構成にしても良い。In this embodiment, the first electrode 4 is directly attached to the first metal sealing body 2 by welding, but as shown in FIG. 3, the metal body 10 such as tungsten or molybdenum is attached to the electrode. The metal body 10 may be attached to the metal sealing body 2, or the second electrode 5 may have the same structure as the first electrode.
考案の効果 以上本考案の点火装置用定電圧放電管の電極４と第４図
に示す従来の電極11,12の構成に係るプレス成型品にお
ける半球状の先端部の欠落状況をプレス成型の条件を同
等にして各1,000個についてみた結果は、次表の通りで
ある。Effects of the Invention As described above, the condition of the press molding is the lack of the hemispherical tip in the press molded product according to the structure of the electrode 4 of the constant voltage discharge tube for the ignition device of the present invention and the conventional electrodes 11 and 12 shown in FIG. The following table shows the results obtained by equating each of the 1,000 items.
この結果より明らかなように、本考案による電極は、先
端部の欠落が殆どなく従来品に比べて非常に良好なもの
となっている。 As is clear from this result, the electrode according to the present invention has almost no missing of the tip portion and is very good as compared with the conventional product.
第１図は本考案の点火装置用定電圧放電管の実施例であ
る縦断面図、第２図は、、第１図に係る電極の構造を示
したもので、同図（イ）は縦断面図、同図（ロ）は上面
図、同図（ハ）は外観図、第３図は本考案の点火装置用
定電圧放電管に用いられる電極の他の実施例である縦断
面図、第４図は実願昭63−126654号に係る点火装置用定
電圧放電管の縦断面図である。 １……中空円筒外囲器、2,……第１の金属封塞体、３…
…第２の金属封塞体、４……第１の電極、５……第２の
電極、８……先端部、９……基部FIG. 1 is a vertical sectional view showing an embodiment of a constant voltage discharge tube for an ignition device of the present invention, and FIG. 2 shows a structure of an electrode according to FIG. 1, in which FIG. FIG. 3B is a top view, FIG. 2C is an external view, and FIG. 3 is a vertical cross-sectional view showing another embodiment of the electrode used in the constant voltage discharge tube for the ignition device of the present invention. FIG. 4 is a vertical sectional view of a constant voltage discharge tube for an ignition device according to Japanese Utility Model Application No. 63-126654. 1 ... Hollow cylindrical envelope, 2, ... First metal enclosure, 3 ...
... second metal enclosure, 4 ... first electrode, 5 ... second electrode, 8 ... tip part, 9 ... base part
Claims (1)
ラミック等の絶縁材料よりなる中空円筒外囲器と、前記
中空円筒外囲器の両端開口を封塞する第１と第２の金属
封塞体と、前記第１と第２の金属封塞体に取り付けられ
る第１と第２の電極とからなり、前記第１と第２の電極
の少なくとも一方は金属粉末をプレス成型して焼結さ
れ、半球状の先端部と、この先端部に連設した部分が前
記先端部の底面積より大きい面積を有した基部とからな
り前記基部が前記金属封塞体に固着されてなる点火装置
用定電圧放電管。1. A hollow cylindrical envelope having a hollow portion in which an inert gas is sealed and made of an insulating material such as ceramics, and first and second openings for sealing both end openings of the hollow cylindrical envelope. And a first and second electrode attached to the first and second metal sealing bodies, and at least one of the first and second electrodes is formed by press molding a metal powder. And is sintered and formed into a hemispherical tip portion, and a portion connected to the tip portion has a base portion having an area larger than the bottom area of the tip portion, and the base portion is fixed to the metal sealing body. Constant voltage discharge tube for ignition device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9234489U JPH073598Y2 (en) | 1989-08-04 | 1989-08-04 | Constant voltage discharge tube for ignition device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9234489U JPH073598Y2 (en) | 1989-08-04 | 1989-08-04 | Constant voltage discharge tube for ignition device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0332394U JPH0332394U (en) | 1991-03-28 |
| JPH073598Y2 true JPH073598Y2 (en) | 1995-01-30 |
Family
ID=31641781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9234489U Expired - Fee Related JPH073598Y2 (en) | 1989-08-04 | 1989-08-04 | Constant voltage discharge tube for ignition device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH073598Y2 (en) |
-
1989
- 1989-08-04 JP JP9234489U patent/JPH073598Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0332394U (en) | 1991-03-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |