JP2853787B2 - High pressure sodium lamp - Google Patents
High pressure sodium lampInfo
- Publication number
- JP2853787B2 JP2853787B2 JP20644892A JP20644892A JP2853787B2 JP 2853787 B2 JP2853787 B2 JP 2853787B2 JP 20644892 A JP20644892 A JP 20644892A JP 20644892 A JP20644892 A JP 20644892A JP 2853787 B2 JP2853787 B2 JP 2853787B2
- Authority
- JP
- Japan
- Prior art keywords
- tube
- conductive
- electrode rod
- conductive wire
- lamp
- 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
Landscapes
- Discharge Lamp (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は高圧ナトリウムランプに
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-pressure sodium lamp.
【０００２】[0002]
【従来の技術】従来の高圧ナトリウムランプにおいて
は、図４に示すように、アルミナ管２２の端部の孔２３
に導電管２０をその開口部２０ａがアルミナ管２２の内
側に位置するようにセラミックセメント２４で封着し、
さらに導電管２０の閉塞部２０ｂに、先端部に電極コイ
ル１６を保持した電極棒１７の後端に接合された導電線
１８を貫通させ、この導電線１８を閉塞部２０ｂにろう
材２１によって気密に固着し、電極棒１７と導電線１８
との接合部１９をろう材２１に近接して設けたものが知
られている。2. Description of the Prior Art In a conventional high-pressure sodium lamp, as shown in FIG.
The conductive tube 20 is sealed with ceramic cement 24 so that the opening 20a is located inside the alumina tube 22,
Further, a conductive wire 18 joined to the rear end of the electrode rod 17 holding the electrode coil 16 at the distal end is passed through the closed portion 20b of the conductive tube 20, and the conductive wire 18 is hermetically sealed to the closed portion 20b by the brazing material 21. And the electrode rod 17 and the conductive wire 18
Is known in which a joining portion 19 is provided close to a brazing material 21.
【０００３】[0003]
【発明が解決しようとする課題】しかし、このような従
来の高圧ナトリウムランプにおいては、タングステンか
らなる電極棒１７と主としてニオビウムからなる導電線
１８とを接合しているために、接合時の高い温度で電極
棒１７と導電線１８との接合部１９付近に再結晶が生じ
る。さらに、接合部１９がろう材２１に近接して設けら
れているために、導電線１８と導電管２０との固着時す
なわち、ろう付け時の２０００℃以上の高温が導電線１
８を伝わることによって、電極棒１７と導電線１８との
接合部１９付近での再結晶が進行する。また、ランプ点
灯中に熱が接合部１９に直接伝わるため、再結晶が徐々
に進行する。その結果、電極棒１７はもろくなって、ラ
ンプの取扱い時やランプ使用中等の振動や衝撃によって
折れやすく、ランプが点灯しなくなる等の不具合が生じ
るという問題があった。However, in such a conventional high-pressure sodium lamp, since the electrode rod 17 made of tungsten and the conductive wire 18 mainly made of niobium are joined, a high temperature during joining is high. As a result, recrystallization occurs near the joint 19 between the electrode rod 17 and the conductive wire 18. Further, since the joining portion 19 is provided close to the brazing material 21, when the conductive wire 18 is fixed to the conductive tube 20, that is, at a high temperature of 2000 ° C. or more during brazing, the conductive wire 1
8, recrystallization near the junction 19 between the electrode rod 17 and the conductive wire 18 progresses. In addition, since heat is directly transmitted to the joint 19 while the lamp is turned on, recrystallization proceeds gradually. As a result, there is a problem that the electrode rod 17 becomes brittle and is easily broken due to vibration or impact during handling of the lamp or during use of the lamp, which causes a problem that the lamp does not turn on.
【０００４】本発明は、このような問題を解決するため
になされたもので、電極棒の破損を防止し、ランプの不
点をなくすることのできる高圧ナトリウムランプを提供
するものである。The present invention has been made to solve such a problem, and it is an object of the present invention to provide a high-pressure sodium lamp capable of preventing damage to an electrode rod and eliminating defects of the lamp.
【０００５】[0005]
【課題を解決するための手段】本発明の高圧ナトリウム
ランプは、先端部に電極コイルを保持した電極棒の後端
に導電線を接合して接合部を形成し、一端に開口部を有
し他端に閉塞部が形成された導電管の前記開口部が前記
電極コイル側に位置するように、前記導電線を前記導電
管の閉塞部に貫通させ、前記電極棒と前記導電線との接
合部をろう材に埋設させ、前記電極棒および前記導電線
を前記ろう材によって前記導電管に固着し、前記導電管
をアルミナ管の端部に固着した発光管を備えた構成を有
する。The high-pressure sodium lamp of the present invention has a junction formed by joining a conductive wire to the rear end of an electrode rod holding an electrode coil at the tip, and has an opening at one end. The conductive wire is passed through the closed portion of the conductive tube so that the opening of the conductive tube having the closed portion formed at the other end is located on the electrode coil side, and the connection between the electrode rod and the conductive line is performed. The electrode rod and the conductive wire are fixed to the conductive tube with the brazing material, and the light emitting tube is fixed to the end of the alumina tube.
【０００６】[0006]
【作用】本発明は、電極棒と導電線との接合部をろう材
に埋設しているため、ランプ点灯中、熱がろう材にて分
散するとともに接合部に直接加わることがないので再結
晶が徐々に進行するのを防止することができる。また、
電極棒と導電線と導電管とはろう材で強固に固着されて
いる。According to the present invention, since the joint between the electrode rod and the conductive wire is buried in the brazing material, heat is dispersed by the brazing material during lamp operation and is not directly applied to the joining portion. Can be prevented from gradually progressing. Also,
The electrode rod, the conductive wire and the conductive tube are firmly fixed with a brazing material.
【０００７】[0007]
【実施例】図１において、電極コイル１は、電子放射性
物質を有するタングステンからなり、長さ９mmで直径
０.８mmの１.５％の酸化トリウムを含有したタングステ
ンからなる電極棒２の先端部に保持されている。電極棒
２の後端には、直径１.２mmの１％のジルコニウムを含
有したニオビウムからなる導電線３の一端が接合されて
接合部１０が形成されている。導電管４は、一端に開口
部４ａを有し他端に閉塞部４ｂが形成され、外径が４.
０mmで全長が９mmであって、１％のジルコニウムを含有
したニオビウムからなる。導電線３は導電管４の閉塞部
４ｂに設けられた穴５に貫通されており、このとき、導
電管４の開口部４ａは電極コイル１側に位置するように
設けられている。電極棒２と導電線３との接合部１０
は、導電管４内でろう材であるチタンろう６に埋設され
気密に固着されている。In FIG. 1, an electrode coil 1 is made of tungsten having an electron emitting material, and has a tip of an electrode rod 2 made of tungsten having a length of 9 mm and a diameter of 0.8 mm and containing 1.5% thorium oxide. Is held in. At the rear end of the electrode rod 2, one end of a conductive wire 3 made of niobium containing 1.2% of zirconium and having a diameter of 1.2 mm is joined to form a joint 10. The conductive tube 4 has an opening 4a at one end and a closed portion 4b at the other end, and has an outer diameter of 4.
It is made of niobium which is 0 mm and 9 mm in length and contains 1% of zirconium. The conductive wire 3 penetrates a hole 5 provided in a closed portion 4b of the conductive tube 4, and at this time, the opening 4a of the conductive tube 4 is provided so as to be located on the electrode coil 1 side. Joint 10 between electrode rod 2 and conductive wire 3
Are buried in a titanium braze 6 which is a brazing material in the conductive tube 4 and are hermetically fixed.
【０００８】発光管１１は、内径が８mmで外径が１０mm
である透光性アルミナ管７の端部の直径４.１mmの穴８
が形成されており、この穴８に導電管４が挿入され、穴
８に導電管４がＹ2Ｏ3−ＣａＯ−ＳｒＯ−Ａｌ2Ｏ3から
なるセラミックセメント９によって、気密に封着されて
いる。発光管１１内には、キセノンガス５×１０3Paと
ともに、ナトリウム５mgと水銀１３mgとからなるナトリ
ウムアマルガム１２が封入されている。ランプ点灯中ナ
トリウムアマルガム１２は通常最冷点となる導電管４の
閉塞部４ｂ付近に位置する。発光管１１は外管１４内に
設けられている。導電線３の他端は、一端が口金１３に
接続されたリード線１５の他端にそれぞれ接続されてい
る。The arc tube 11 has an inner diameter of 8 mm and an outer diameter of 10 mm
A hole 8 having a diameter of 4.1 mm at the end of the translucent alumina tube 7
The conductive tube 4 is inserted into the hole 8, and the conductive tube 4 is hermetically sealed in the hole 8 by a ceramic cement 9 made of Y 2 O 3 —CaO—SrO—Al 2 O 3. I have. In the arc tube 11, sodium amalgam 12 composed of 5 mg of sodium and 13 mg of mercury is sealed together with 5 × 10 3 Pa of xenon gas. During the operation of the lamp, the sodium amalgam 12 is located near the closed portion 4b of the conductive tube 4, which is usually the coldest point. The arc tube 11 is provided inside the outer tube 14. The other end of the conductive wire 3 is connected to the other end of the lead wire 15 whose one end is connected to the base 13.
【０００９】なお、発光管１１の電極間距離は３１mmで
ある。また、発光管両端部外面には、厚さ０.５mm、幅
１３mmのタンタルからなる熱保護膜（図示せず）が付設
されている。さらに、本実施例では電極棒２としてトリ
ウム−タングステンの例を示したが電極棒２の材質がタ
ングステンの場合にも適用可能なことは言うまでもな
い。The distance between the electrodes of the arc tube 11 is 31 mm. A thermal protection film (not shown) made of tantalum having a thickness of 0.5 mm and a width of 13 mm is provided on the outer surfaces of both ends of the arc tube. Further, in the present embodiment, an example in which thorium-tungsten is used as the electrode rod 2 has been described.
【００１０】かかる構造の発光管を有するランプを８０
灯製作し、入力１５０Ｗで点灯５.５時間、消灯０.５時
間サイクルで定格寿命９０００時間点灯後、２Ｇの衝撃
を加えて試験したところ、電極棒の損傷はまったく発生
せず、本発明の効果が確認された。A lamp having an arc tube having such a structure is referred to as 80.
The lamp was manufactured and turned on for 5.5 hours at input power of 150 W and lit for 9000 hours with a cycle of 0.5 hours for turning off the light. Then, a test was conducted by applying a shock of 2G. As a result, no damage to the electrode rod occurred. The effect was confirmed.
【００１１】図３は、本発明の他の実施例を示すもの
で、この実施例の場合はアルミナ管７の形状が端部で絞
られたものであり、上記実施例と同様な効果が得られる
ものである。FIG. 3 shows another embodiment of the present invention. In this embodiment, the shape of the alumina tube 7 is narrowed at the end, and the same effect as in the above embodiment can be obtained. It is something that can be done.
【００１２】以上のように、本発明実施例の高圧ナトリ
ウムランプは、電極棒２と導電線３との接合部１０がチ
タンろう６の中に埋設され、電極棒２と導電線３と導電
管４とがチタンろう６により固着されているので、ラン
プ点灯中の熱で電極棒２の再結晶が徐々に進行するのを
防止することができ、ランプの取扱い時やランプ使用中
等の振動や衝撃によって電極棒２が破損するのを防止で
き、ランプが点灯しなくなるといった不具合が生じるの
を防止できる。As described above, in the high-pressure sodium lamp according to the embodiment of the present invention, the joint 10 between the electrode rod 2 and the conductive wire 3 is buried in the titanium solder 6, and the electrode rod 2, the conductive wire 3 and the conductive tube are connected. 4 is fixed by the titanium brazing material 6, so that the recrystallization of the electrode rod 2 can be prevented from gradually progressing due to the heat during the operation of the lamp. Accordingly, it is possible to prevent the electrode rod 2 from being damaged and to prevent a problem that the lamp is not turned on.
【００１３】[0013]
【発明の効果】以上説明したように、本発明の高圧ナト
リウムランプは、電極棒と導電線との接合部がろう材中
に埋設され、かつ電極棒と導電線とが導電管に固着され
ているため、ランプ点灯中の熱で電極棒と導電線との接
合部付近における再結晶が徐々に進行するのを防止でき
るため、電極棒の破損を防止することができ、ランプが
点灯しなくなる等の不具合いが生じるのを防止すること
ができる。As described above, in the high-pressure sodium lamp of the present invention, the joint between the electrode rod and the conductive wire is embedded in the brazing material, and the electrode rod and the conductive wire are fixed to the conductive tube. Therefore, the recrystallization near the junction between the electrode rod and the conductive wire can be prevented from gradually progressing due to heat during lamp operation, so that damage to the electrode rod can be prevented, and the lamp does not light. Can be prevented from occurring.
【図１】本発明の一実施例である高圧ナトリウムランプ
の発光管の要部拡大断面図FIG. 1 is an enlarged sectional view of a main part of an arc tube of a high-pressure sodium lamp according to one embodiment of the present invention.
【図２】同じく高圧ナトリウムランプの一部切欠正面図FIG. 2 is a partially cutaway front view of the same high-pressure sodium lamp.
【図３】本発明の他の実施例である高圧ナトリウムラン
プの発光管の要部拡大断面図FIG. 3 is an enlarged sectional view of a main part of an arc tube of a high-pressure sodium lamp according to another embodiment of the present invention.
【図４】従来の高圧ナトリウムランプの発光管の一部拡
大断面図FIG. 4 is a partially enlarged cross-sectional view of an arc tube of a conventional high-pressure sodium lamp.
１ 電極コイル ２ 電極棒 ３ 導電線 ４ 導電管 ４ａ 導電管の開口部 ４ｂ 導電管の閉塞部 ６ チタンろう ７ アルミナ管 １０ 接合部 １１ 発光管 １２ ナトリウムアマルガム １４ 外管 DESCRIPTION OF SYMBOLS 1 Electrode coil 2 Electrode rod 3 Conductive wire 4 Conductive tube 4a Opening of conductive tube 4b Closed portion of conductive tube 6 Titanium brazing 7 Alumina tube 10 Joint 11 Light emitting tube 12 Sodium amalgam 14 Outer tube
───────────────────────────────────────────────────── フロントページの続き (72)発明者 吉田 忠弘 大阪府門真市大字門真1006番地 松下電 子工業株式会社内 (56)参考文献 特開 平１−281657（ＪＰ，Ａ) 特開 平１−236574（ＪＰ，Ａ) 特開 昭51−99885（ＪＰ，Ａ) 特開 昭63−81754（ＪＰ，Ａ) 特開 平４−121931（ＪＰ，Ａ) 特開 昭64−77863（ＪＰ，Ａ) 特開 昭64−60949（ＪＰ，Ａ) 特開 昭63−141237（ＪＰ，Ａ) 特開 昭62−139229（ＪＰ，Ａ) 実開 昭47−24868（ＪＰ，Ｕ) 実開 昭57−19863（ＪＰ，Ｕ) 実開 昭57−115159（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) H01J 61/36 H01J 9/36 H01J 61/073────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Tadahiro Yoshida 1006 Kazuma Kadoma, Kadoma City, Osaka Inside Matsushita Electronics Corporation (56) References JP-A-1-281657 (JP, A) JP-A-1- 236574 (JP, A) JP-A-51-99885 (JP, A) JP-A-63-81754 (JP, A) JP-A-4-121193 (JP, A) JP-A-64-77863 (JP, A) JP-A-64-60949 (JP, A) JP-A-63-141237 (JP, A) JP-A-62-139229 (JP, A) Fully open 47-2868 (JP, U) Really open 57-19863 (JP, U) Japanese Utility Model 57-115159 (JP, U) (58) Fields investigated (Int. Cl. 6 , DB name) H01J 61/36 H01J 9/36 H01J 61/073
Claims (1)
後端に導電線を接合して接合部を形成し、一端に開口部
を有し他端に閉塞部が形成された導電管の前記開口部が
前記電極コイル側に位置するように、前記導電線を前記
導電管の閉塞部に貫通させ、前記電極棒と前記導電線と
の接合部をろう材に埋設させ、前記電極棒および前記導
電線を前記ろう材によって前記導電管に固着し、前記導
電管をアルミナ管の端部に固着した発光管を備えたこと
を特徴とする高圧ナトリウムランプ。1. A conductive tube having a joint portion formed by joining a conductive wire to a rear end of an electrode rod holding an electrode coil at a tip portion, and having an opening at one end and a closed portion at the other end. The conductive wire penetrates a closed portion of the conductive tube so that the opening is located on the electrode coil side, and a joint between the electrode rod and the conductive wire is embedded in a brazing material, and the electrode rod and A high-pressure sodium lamp, comprising: an arc tube in which the conductive wire is fixed to the conductive tube with the brazing material, and the conductive tube is fixed to an end of an alumina tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20644892A JP2853787B2 (en) | 1992-08-03 | 1992-08-03 | High pressure sodium lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20644892A JP2853787B2 (en) | 1992-08-03 | 1992-08-03 | High pressure sodium lamp |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP822689A Division JPH01281657A (en) | 1988-01-18 | 1989-01-17 | High pressure sodium-vapor lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05190143A JPH05190143A (en) | 1993-07-30 |
| JP2853787B2 true JP2853787B2 (en) | 1999-02-03 |
Family
ID=16523548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20644892A Expired - Fee Related JP2853787B2 (en) | 1992-08-03 | 1992-08-03 | High pressure sodium lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2853787B2 (en) |
-
1992
- 1992-08-03 JP JP20644892A patent/JP2853787B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05190143A (en) | 1993-07-30 |
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