JPH03165481A - Constant voltage discharge tube for ignition device and its manufacture - Google Patents
Constant voltage discharge tube for ignition device and its manufactureInfo
- Publication number
- JPH03165481A JPH03165481A JP30416989A JP30416989A JPH03165481A JP H03165481 A JPH03165481 A JP H03165481A JP 30416989 A JP30416989 A JP 30416989A JP 30416989 A JP30416989 A JP 30416989A JP H03165481 A JPH03165481 A JP H03165481A
- Authority
- JP
- Japan
- Prior art keywords
- sealing body
- small hole
- glass
- sealing
- constant voltage
- 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
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 238000007789 sealing Methods 0.000 claims abstract description 74
- 239000011521 glass Substances 0.000 claims abstract description 36
- 239000005394 sealing glass Substances 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims description 36
- 239000002184 metal Substances 0.000 claims description 36
- 239000011261 inert gas Substances 0.000 claims description 25
- 238000002844 melting Methods 0.000 claims description 7
- 230000008018 melting Effects 0.000 claims description 7
- 239000000919 ceramic Substances 0.000 claims description 5
- 239000011810 insulating material Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 239000008393 encapsulating agent Substances 0.000 claims 1
- 238000003466 welding Methods 0.000 abstract description 3
- 239000002904 solvent Substances 0.000 abstract 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 3
- 229910052721 tungsten Inorganic materials 0.000 description 3
- 239000010937 tungsten Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 229910052715 tantalum Inorganic materials 0.000 description 2
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002611 lead compounds Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
Landscapes
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、内燃機関の点火装置における点火プラグと直
列に接続されて使用される定電圧放電管およびその製造
方法に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a constant voltage discharge tube used in series connection with a spark plug in an ignition system for an internal combustion engine, and a method for manufacturing the same.
従来の技術
内燃機関の点火装置における点火プラグの絶縁磁器体表
面にカーボン、鉛化合物等が付着して必要な電圧が点火
プラグ電極のところで得られなくなるのを防止するため
に、点火プラグと直列に放電管を接続することが知られ
ており、本出願人も此種放電管を特願昭６３−２４３０
２３号他にて提案している。Conventional Technology In order to prevent carbon, lead compounds, etc. from adhering to the surface of the insulating porcelain body of the spark plug in the ignition system of an internal combustion engine, which would prevent the required voltage from being obtained at the spark plug electrode, It is known to connect discharge tubes, and the present applicant also filed a patent application for this type of discharge tube in 1986-2430.
It is proposed in No. 23 and others.
第７図は、その特願昭６３−２４３０２３号に係る放電
管の断面図を示したものであり、中空円筒外囲器１の両
端開口を、主電極８を取りつけた金属封塞体７と主電極
１２を取りつけた金属封塞体１１とで封着ガラス１０の
封着により封塞し、中空部３内に所定圧の不活性ガスを
封入したものである。FIG. 7 shows a cross-sectional view of the discharge tube according to Japanese Patent Application No. 63-243023, in which the openings at both ends of the hollow cylindrical envelope 1 are connected to the metal enclosure 7 to which the main electrode 8 is attached. The hollow part 3 is sealed with a metal sealing body 11 having a main electrode 12 attached thereto by sealing with a sealing glass 10, and an inert gas at a predetermined pressure is filled in the hollow part 3.
その中空部３への不活性ガスの封入、封鎖は、いずれか
一方の金属封塞体７．１１で封着ガラス１０により一方
の開口が封塞された中空円筒外囲器１の他方の開口部に
もう一方の金属封塞体を載置して密封容器内にセット腰
密封容器を排気し不活性ガスを封入することにより中空
部３に不活性ガスを封入した後、封着ガラスを加熱溶融
して他方の金属封塞体で中空円筒外囲器の他方の開口を
封塞して行っている。The filling and sealing of the inert gas into the hollow part 3 is performed by opening the other opening of the hollow cylindrical envelope 1, one opening of which is sealed with the sealing glass 10 by one of the metal sealing bodies 7 and 11. Place the other metal sealing body in the hollow part 3 and set it in the sealed container. After filling the hollow part 3 with inert gas by evacuating the sealed container and filling it with inert gas, heat the sealed glass. This is done by melting and sealing the other opening of the hollow cylindrical envelope with the other metal sealing body.
発明が解決しようとする課題
上記した不活性ガスの封入方法では、密閉容器内で封着
されていない金属封塞体を介して不活性ガスを封入した
後、封着ガラスを加熱溶融してその金属封塞体で開口を
封塞するので封着ガラスの一部分に小さな穴があくこと
があり、製造歩留まりの低下や長期におけるスローリー
ク等の問題を有している。Problems to be Solved by the Invention In the above-described inert gas filling method, the inert gas is sealed in a sealed container through an unsealed metal sealing body, and then the sealing glass is heated and melted. Since the opening is sealed with a metal sealing body, a small hole may be formed in a portion of the sealing glass, resulting in problems such as a decrease in manufacturing yield and slow leakage over a long period of time.
これは、金属封塞体の全周に亘り封着ガラスで封着する
必要性から封着ガラスを比較的長時間加熱溶融しなけれ
ばならないこと及び封着ガラスと金属封塞体との接触面
積が大きいので、加熱溶着時には密閉容器内の圧力より
も中空部３内の圧力が大きくなるので圧力差により封着
ガラスの一部分にガスの抜は穴ができるものと思われる
。This is because the sealing glass must be heated and melted for a relatively long time because it is necessary to seal the entire circumference of the metal sealing body with the sealing glass, and the contact area between the sealing glass and the metal sealing body is small. Since the pressure inside the hollow part 3 is large during heat welding, the pressure inside the hollow part 3 becomes higher than the pressure inside the closed container, so it is thought that a hole is formed in a part of the sealing glass due to the pressure difference.
したがって本発明は、係る問題点を解決した点火装置用
定電圧放電管及びその製造方法を提供するものである。Therefore, the present invention provides a constant voltage discharge tube for an ignition device and a method for manufacturing the same, which solves the above problems.
課題を解決するための手段
本発明の定電圧放電管は、中空円筒外囲器の両端開口を
封塞する金属封塞体のいずれか一方に設けられる小孔と
、この小孔を介して中空部を排気し不活性ガスを封入し
たのち前記小孔を封鎖するガラス封着体を有して成る。Means for Solving the Problems The constant voltage discharge tube of the present invention has a small hole provided in either one of the metal closures that closes the openings at both ends of a hollow cylindrical envelope, and a hollow After the chamber is evacuated and an inert gas is filled in, the small hole is sealed with a glass sealing body.
本発明の他の定電圧放電管は、金属封塞体により両端開
口が封塞される中空円筒外囲器の中空部に連通した小孔
と、この小孔を介して前記中空部を排気し不活性ガスを
封入したのち前記小孔を封鎖するガラス封着体を有して
成る。Another constant voltage discharge tube of the present invention has a small hole communicating with a hollow part of a hollow cylindrical envelope whose openings at both ends are closed by a metal sealing body, and a small hole communicating with the hollow part of the hollow cylindrical envelope through which the hollow part is evacuated. It has a glass sealing body that seals the small hole after sealing in an inert gas.
本発明の定電圧放電管は、中空部を有した中空円筒外囲
器の両端開口部に封着ガラスにより封着されている金属
封塞体の一方に設けられガラス封着体が取りつけられた
小孔を介して前記中空部を排気し、前記小孔を介して前
記中空部に不活性ガスを封入したのち、前記小孔をガラ
ス封着体の加熱溶融により封鎖して作られる。The constant voltage discharge tube of the present invention is provided on one side of a metal sealing body which is sealed with a sealing glass at both end openings of a hollow cylindrical envelope having a hollow part, and a glass sealing body is attached to the metal sealing body. The hollow part is evacuated through a small hole, an inert gas is filled into the hollow part through the small hole, and then the small hole is sealed by heating and melting a glass sealed body.
本発明の他の定電圧放電管は、両端開口が金属封塞体で
封塞された中空円筒外囲器の中空部に連通した小孔を介
して前記中空部を排気、前記小孔を介して前記中空部に
不活性ガスを封入した後、前記小孔をガラス到着体の加
熱溶融により封鎖して作られる。In another constant voltage discharge tube of the present invention, the hollow part is evacuated through a small hole communicating with the hollow part of a hollow cylindrical envelope whose both end openings are sealed with a metal sealing body, and the hollow part is evacuated through the small hole. After filling the hollow portion with an inert gas, the small holes are sealed by heating and melting the glass arrival body.
作 用
金属封塞体の小孔または中空円筒外囲器の小孔を介して
中空部を排気し、前記中空部に不活性ガスを封入した後
、前記小孔に取りつけたガラス封着体を加熱溶融して前
記小孔を封鎖するものであり、又前記ガラス封着体は前
記小孔を封鎖するだけの小さな物で良いので、前記小孔
の封鎖のための前記ガラス封着体への加熱時間は極めて
短時間で済み、ガラス封着体に穴があくことはなく定電
圧放電管の製造歩留まりは良く、さらに定電圧放電管の
長期におけるスローリークの惧れもまったくない。After evacuating the hollow part through the small hole of the metal sealing body or the small hole of the hollow cylindrical envelope and filling the hollow part with an inert gas, the glass sealing body attached to the small hole is evacuated. The small holes are sealed by heating and melting, and the glass sealing body may be small enough to seal the small holes, so the glass sealing body for sealing the small holes is The heating time is extremely short, there are no holes in the glass sealed body, the production yield of constant voltage discharge tubes is high, and there is no fear of slow leakage in the constant voltage discharge tube over a long period of time.
実施例 以下、本発明を実施例図面と共に説明する。Example Hereinafter, the present invention will be explained with reference to drawings of embodiments.
第１図〜第４図は本発明の定電圧放電管の一実施例を示
す図面であり、第１図は中空円筒外囲器の外観図であり
、セラミック等の絶縁材料の粉末をプレス成型して焼結
または同材料の円筒を切削することにより、不活性ガス
が封入される中空部３と、両開口端の周縁に溝２が設け
られて作られる。Figures 1 to 4 are drawings showing an embodiment of the constant voltage discharge tube of the present invention, and Figure 1 is an external view of a hollow cylindrical envelope, which is formed by press-molding powder of an insulating material such as ceramic. By sintering or cutting a cylinder made of the same material, a hollow part 3 in which an inert gas is filled and grooves 2 are provided at the periphery of both open ends are made.
第２図（イ）は第１の主電極５が取りつけられ小孔６を
存した第１の金属封塞体４の外観図であり、同図（ロ）
は第２の主電極８が取りつけらたれ第２の金属封塞体７
の外観図であり、第１の主電極５は、タングステン、タ
ンクル等の棒状金属体の先端にタングステン、モリブデ
ン、タンタル等の一種または混合粉末をプレス成型し焼
結した焼結体が取りつけられて構成され、第２の主電極
８は、タングステン、タンタル等の棒状金属が用いられ
る。FIG. 2(a) is an external view of the first metal sealing body 4 to which the first main electrode 5 is attached and has a small hole 6, and FIG.
is a second metal enclosure 7 to which a second main electrode 8 is attached.
This is an external view of the first main electrode 5, in which a sintered body obtained by press-molding and sintering one type or mixed powder of tungsten, molybdenum, tantalum, etc. is attached to the tip of a rod-shaped metal body such as tungsten or tankle. The second main electrode 8 is made of a rod-shaped metal such as tungsten or tantalum.
本発明の定電圧放電管は、まず第３図に示すように、第
１の金属封塞体４と第２の金属封塞体７とで封着ガラス
１０の溶着により中空円筒外囲器１の両端開口を封塞す
る。In the constant voltage discharge tube of the present invention, as shown in FIG. Seal the openings at both ends.
次いで、第１の金属封塞体４の小孔６にガラス封着体９
を取りつけ、中空円筒外囲器１を図示しない密閉容器内
にセットし、密閉容器を排気することにより中空部３内
も小孔６を通して排気され、排気後密閉容器内に所定圧
の不活性ガスを封入すれば、中空部３にも小孔６を介し
て所定圧の不活性ガスが封入される。Next, a glass sealing body 9 is inserted into the small hole 6 of the first metal sealing body 4.
, the hollow cylindrical envelope 1 is set in a closed container (not shown), and the inside of the hollow part 3 is also evacuated through the small hole 6 by evacuating the closed container. When the inert gas is filled in, the hollow part 3 is also filled with inert gas at a predetermined pressure through the small hole 6.
その状態で、密閉容器の外部からたとえば公知の高周波
加熱装置によりガラス封着体９を加熱すると、ガラス封
着体９は極めて短時間に溶融されて、小孔６が第４図（
イ）の部分断面図に示すようにガラス封着体９の溶着に
より封鎖されて定電圧放電管が完成される。In this state, when the glass sealed body 9 is heated from outside the closed container using, for example, a known high-frequency heating device, the glass sealed body 9 is melted in an extremely short time, and the small holes 6 are formed as shown in FIG.
As shown in the partial sectional view of (a), the glass sealing body 9 is sealed by welding to complete the constant voltage discharge tube.
第４図（ロ）は完成された定電圧放電管の上面図である
。FIG. 4(b) is a top view of the completed constant voltage discharge tube.
なお、ガラス封着体９が加熱溶融されるときは、先に封
着した封着ガラス１０も加熱されるが、ガラス封着体９
は小孔６を封鎖するだけの小さな物であり、加熱溶融し
て封鎖する時間は極めて短いので封着ガラス１０が溶融
するまでには至らない。Note that when the glass sealing body 9 is heated and melted, the previously sealed sealing glass 10 is also heated, but the glass sealing body 9
is small enough to seal the small hole 6, and the time for heating and melting it to seal it is extremely short, so it does not reach the point where the sealing glass 10 is melted.
またガラス封着体９への加熱は上記した高周波加熱装置
でも問題はないが、密閉容器外より光ビームでガラス封
着体だけを集中的に加熱して溶融すれば、他の部分への
加熱は殆どなくより効率的に行うことが出来る。Furthermore, there is no problem in heating the glass sealed body 9 using the above-mentioned high frequency heating device, but if only the glass sealed body is intensively heated and melted with a light beam from outside the sealed container, heating of other parts can be avoided. This can be done more efficiently with almost no loss.
第５図は、本発明の定電圧放電管の他の実施例を示した
断面図であり、排気、不活性ガスの封入の為の小孔１３
を中空円筒外囲器１４に設けたものである。FIG. 5 is a sectional view showing another embodiment of the constant voltage discharge tube of the present invention, in which small holes 13 are used for evacuation and filling of inert gas.
is provided in the hollow cylindrical envelope 14.
本実施例は、まず第１の主電極１２が取りつけられた第
１の金属封塞体１１と第２の主電極８が取りつけられた
第２の金属封塞体７とで封着ガラス１０により中空円筒
外囲器１４の両開口を封塞した後、中空円筒外囲器１４
を図示しない密閉容器にセットし、密閉容器内を排気し
所定圧の不活性ガスを封入すれば、中空円筒外囲器１４
の中空部３は小孔１３を介して排気され所定圧の不活性
ガスが封入される。In this embodiment, first, a first metal sealing body 11 to which a first main electrode 12 is attached and a second metal sealing body 7 to which a second main electrode 8 is attached are connected by a sealing glass 10. After sealing both openings of the hollow cylindrical envelope 14, the hollow cylindrical envelope 14 is closed.
is set in a closed container (not shown), the inside of the closed container is evacuated, and an inert gas of a predetermined pressure is filled, the hollow cylindrical envelope 14 is formed.
The hollow part 3 is evacuated through the small hole 13 and filled with inert gas at a predetermined pressure.
次いで、小孔１３に取りつけたガラス封着体９を、前実
施例と同様に加熱溶融すれば小孔１３が封鎖されて定電
圧放電管が完成される。Next, the glass sealing body 9 attached to the small hole 13 is heated and melted in the same manner as in the previous embodiment, thereby sealing the small hole 13 and completing a constant voltage discharge tube.
なお、小孔６．１３を封鎖するガラス封着体９は、第６
図（イ）に示すように小孔６．１３に挿入される円錐状
の先端部１５と小径の台部１６とで構成してもよいが、
同図（ロ）に示すように先端部１５と台部１６に亘り溝
１７を一ケ所又は数ケ所設けておけば、この溝１７を通
じて排気、不活性ガスの封入がよりスムーズに行われる
。Note that the glass sealing body 9 that closes the small hole 6.13 is the sixth
As shown in FIG.
If one or several grooves 17 are provided across the tip portion 15 and the base portion 16 as shown in FIG.
発明の効果
以上述べたように、本発明の定電圧放電管は、不活性ガ
スの封入、封鎖に際し、中空部を有した中空円筒外囲器
の両端開口を封塞する金属封塞体のどちらか一方に設け
た小孔、又は前記中空円筒外囲器に設けた小孔を通して
前記中空部を排気し不活性ガスを封入した後、前記小孔
に取りつけた小さなガラス封着体を加熱溶融して前記小
孔を封鎖するだけでよいので、封鎖作業は極めて短時間
の加熱で行うことができ、前記ガラス封着体に穴があく
惧れも全く無（、またその作業も極めてスムーズに行う
ことができる。Effects of the Invention As described above, the constant voltage discharge tube of the present invention has a metal sealing body that seals both openings of a hollow cylindrical envelope having a hollow portion when filling and sealing an inert gas. After evacuating the hollow part and filling it with inert gas through a small hole provided in one side or a small hole provided in the hollow cylindrical envelope, a small glass sealing body attached to the small hole is heated and melted. Since it is only necessary to seal the small hole with the glass seal, the sealing operation can be performed by heating in an extremely short period of time, and there is no risk of making a hole in the glass sealing body (and the operation can be performed extremely smoothly). be able to.
また、そのようにして製造された定電圧放電管は、小孔
を封鎖したガラス封着体からのスローリークの惧れも全
く無い。Furthermore, the constant voltage discharge tube manufactured in this manner has no fear of slow leakage from the glass sealing body in which the small holes are sealed.
さらに、小孔を封鎖したガラス封着体が金属封塞体外部
又は中空円筒外囲器外部に露出した部分は極めて小さな
ものであるので、使用上において何ら問題はない。Further, since the exposed portion of the glass sealing body that has closed the small holes to the outside of the metal sealant or the hollow cylindrical envelope is extremely small, there is no problem in use.
第１図〜第４図は本発明の定電圧放電管の一実施例を示
す図面であり、第１図は中空円筒外囲器の外観図、第２
図（イ）は第１の主電極が取りつけられて成る第１の金
属封塞体の外観図、第２図（ロ）は第２の主電極が取り
つけられて成る第２の金属封塞体の外観図、第３図は第
１と第２の金属封塞体が中空円筒外囲器の両端開口部に
封着されてなる中空円筒外囲器の断面図、第４図（イ）
は定電圧放電管の完成品を部分的に示した断面図、第４
図（ロ）は定電圧放電管の完成品の上面図、第５図は本
発明の定電圧放電管の他の実施例を示した断面図、第６
図（イ）は本発明の定電圧放電管の金属封塞体又は中空
円筒外囲器に設けた小孔を封鎖するガラス封着体の一実
施例を示す外観図、第６図（ロ）は同ガラス封着体の他
の実施例を示す外観図、第７図は従来の点火装置用定電
圧放電管の断面図である。
１．１４・・・中空円筒外囲器、３・・・中空部、４．
１１・・・第１の金属封塞体、５．１２・・・第１の主
電極、６．１３・・・小孔、７・・・第２の金属封塞体
、８・・・第二の金属封塞体、９・・・ガラス封着体、
１０・・・到着ガラス1 to 4 are drawings showing one embodiment of the constant voltage discharge tube of the present invention, in which FIG. 1 is an external view of a hollow cylindrical envelope, and FIG.
Figure (a) is an external view of the first metal enclosure to which the first main electrode is attached, and Figure 2 (b) is an external view of the second metal enclosure to which the second main electrode is attached. Fig. 3 is a sectional view of a hollow cylindrical envelope in which the first and second metal sealing bodies are sealed to the openings at both ends of the hollow cylindrical envelope, and Fig. 4 (A).
4 is a partially sectional view of a completed constant voltage discharge tube.
Figure (B) is a top view of the finished product of the constant voltage discharge tube, Figure 5 is a sectional view showing another embodiment of the constant voltage discharge tube of the present invention, and Figure 6 is a sectional view showing another embodiment of the constant voltage discharge tube of the present invention.
Figure (a) is an external view showing an embodiment of a glass sealing body for sealing a small hole provided in a metal sealing body or a hollow cylindrical envelope of a constant voltage discharge tube according to the present invention, and Fig. 6 (b) 7 is an external view showing another embodiment of the same glass sealed body, and FIG. 7 is a sectional view of a conventional constant voltage discharge tube for an ignition device. 1.14...Hollow cylindrical envelope, 3...Hollow part, 4.
DESCRIPTION OF SYMBOLS 11... 1st metal sealing body, 5.12... 1st main electrode, 6.13... Small hole, 7... 2nd metal sealing body, 8... 1st 2nd metal sealing body, 9... glass sealing body;
10... Arrival glass
Claims (4)
端が開口した中空円筒外囲器と、小孔を有し第１の主電
極が取りつけられてなり前記開口の一方を封塞する第１
の金属封塞体と、第２の主電極が取りつけられ前記開口
の他方を封塞する第２の金属封塞体と、前記中空部に封
入される不活性ガスと、前記小孔を介して前記中空部に
不活性ガスを封入後に前記小孔を封鎖するガラス封着体
とからなる点火装置用定電圧放電管。(1) A hollow cylindrical envelope made of an insulating material such as ceramic and having a hollow part and open at both ends, and a first main electrode having a small hole and sealing one of the openings. 1
a second metal sealing body to which a second main electrode is attached and sealing the other of the openings; an inert gas sealed in the hollow portion; A constant voltage discharge tube for an ignition device, comprising a glass sealing body that seals the small hole after filling the hollow part with an inert gas.
空部に連通した小孔とを有し両端が開口した中空円筒外
囲器と、第１の主電極が取りつけられ前記開口の一方を
封塞する第１の金属封塞体と、第２の主電極が取りつけ
られ前記開口の他方を封塞する第２の金属封塞体と、前
記中空部に封入される不活性ガスと、前記小孔を介して
前記中空部に不活性ガスを封入後に前記小孔を封鎖する
ガラス封着体とからなる点火装置用定電圧放電管。(2) A hollow cylindrical envelope made of an insulating material such as ceramic and having a hollow part and a small hole communicating with the hollow part and open at both ends, and a first main electrode attached to the case and sealing one of the openings. a second metal sealing body to which a second main electrode is attached and which seals the other of the openings; an inert gas sealed in the hollow part; A constant voltage discharge tube for an ignition device, comprising a glass sealing body that seals the small hole after filling the hollow portion with an inert gas through the hole.
端が開口した中空円筒外囲器の前記両端開口を、第１の
主電極が取りつけられ小孔を有した第１の金属封塞体と
第２の主電極が取りつけられた第２の金属封塞体とで封
塞し、前記小孔に封着ガラス体を取りつけ、前記小孔を
介して前記中空部を排気し、前記小孔を介して所定圧の
不活性ガスを前記中空部に封入した後、前記ガラス封着
体を加熱溶融して前記小孔を封鎖してなる点火装置用定
電圧放電管の製造方法。(3) A hollow cylindrical envelope made of an insulating material such as ceramic and having a hollow portion and open at both ends, with a first metal sealing body having a first main electrode attached and a small hole; and a second metal sealing body to which a second main electrode is attached, a sealing glass body is attached to the small hole, and the hollow part is evacuated through the small hole. A method for manufacturing a constant voltage discharge tube for an igniter, comprising filling the hollow portion with an inert gas at a predetermined pressure via a tube, and then heating and melting the glass sealing body to seal the small hole.
空部に連通した小孔とを有し両端が開口した中空円筒外
囲器の前記両端開口を、第１の主電極が取りつけられた
第１の金属封塞体と第２の主電極が取りつけられた第２
の金属封塞体とで封塞し、前記小孔にガラス封着体を取
りつけ、前記小孔を介して前記中空部を排気し、前記小
孔を介して所定圧の不活性ガスを前記中空部に封入した
後、前記ガラス封着体を加熱溶融して前記小孔を 封鎖
してなる点火装置用定電圧放電管の製造方法。(4) A hollow cylindrical envelope made of an insulating material such as ceramic and having a hollow part and a small hole communicating with the hollow part and open at both ends, is connected to a second main electrode to which the first main electrode is attached. a second metal encapsulant and a second main electrode attached thereto;
A glass sealing body is attached to the small hole, the hollow part is evacuated through the small hole, and an inert gas at a predetermined pressure is supplied to the hollow part through the small hole. A method for manufacturing a constant voltage discharge tube for an ignition device, comprising: sealing the small hole by heating and melting the glass sealing body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30416989A JPH03165481A (en) | 1989-11-22 | 1989-11-22 | Constant voltage discharge tube for ignition device and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30416989A JPH03165481A (en) | 1989-11-22 | 1989-11-22 | Constant voltage discharge tube for ignition device and its manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03165481A true JPH03165481A (en) | 1991-07-17 |
Family
ID=17929876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30416989A Pending JPH03165481A (en) | 1989-11-22 | 1989-11-22 | Constant voltage discharge tube for ignition device and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03165481A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6180783A (en) * | 1984-09-28 | 1986-04-24 | 岡谷電機産業株式会社 | Airtight sealing for surge absorbing element |
-
1989
- 1989-11-22 JP JP30416989A patent/JPH03165481A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6180783A (en) * | 1984-09-28 | 1986-04-24 | 岡谷電機産業株式会社 | Airtight sealing for surge absorbing element |
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