JPH11154491A - Discharge lamp and its electrode mount - Google Patents

Discharge lamp and its electrode mount

Info

Publication number
JPH11154491A
JPH11154491A JP31988697A JP31988697A JPH11154491A JP H11154491 A JPH11154491 A JP H11154491A JP 31988697 A JP31988697 A JP 31988697A JP 31988697 A JP31988697 A JP 31988697A JP H11154491 A JPH11154491 A JP H11154491A
Authority
JP
Japan
Prior art keywords
tube
glass
electrode rod
electrode
sealed
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
JP31988697A
Other languages
Japanese (ja)
Inventor
Yukio Sakamoto
本 幸 雄 坂
Yasuo Ban
康 雄 伴
Akira Ogawara
亮 大河原
Atsushi Machida
田 敦 町
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.)
Iwasaki Denki KK
Original Assignee
Iwasaki Denki KK
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 Iwasaki Denki KK filed Critical Iwasaki Denki KK
Priority to JP31988697A priority Critical patent/JPH11154491A/en
Publication of JPH11154491A publication Critical patent/JPH11154491A/en
Pending legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To enhance the pressure proof performance of a discharge lamp by airtightly firmly sealing an electrode mount inserted into a tube end portion, and suppressing the occurrence of crack in glass around an electrode rod resulting from the linear expansion coefficient difference between the electrode rod of the electrode mount and a glass tube in the case of the sealing of the tube end portion of the glass tube to be arc tube material through heat softening. SOLUTION: A glass bead 9 is sealed on the rear end side of the electrode rod 4 of an electrode mount 3 in advance, and airtightness between the glass bead 9 and the electrode rod 4 is previously secured so that the tube end portion 7 is sealed with good airtightness just by sealing to the glass bead 9 without sealing the tube end portion 7 of a glass tube 1 to the electrode rod 4. Thereby, the occurrence of crack in glass around the electrode rod 4 of the tube end portion 7 is suppressed.

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、液晶プロジェクタ
などに用いる省電力の小型光源として好適な放電ランプ
とその電極マウントに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge lamp suitable as a power-saving small light source used for a liquid crystal projector or the like, and an electrode mount thereof.

【0002】[0002]

【従来の技術】液晶プロジェクタやオーバーヘッドプロ
ジェクタ用光源等には、水銀のみや、これにハロゲンを
添加した電力500W以下、アーク長3〜10mm以下
の、高圧又は超高圧で動作させる省電力の小型高圧金属
蒸気放電ランプが用いられている。
2. Description of the Related Art A light source for a liquid crystal projector or an overhead projector, etc. includes a mercury alone or a halogen-added power of 500 W or less, an arc length of 3 to 10 mm or less, and a power-saving small high-voltage operated at high pressure or ultra-high pressure. Metal vapor discharge lamps have been used.

【0003】この種の放電ランプは、図3に示すよう
に、発光管材料となるガラス管30の中央に、放電空間
Sとなる球状の拡管部31が形成され、そのガラス管3
0の両端から、電極棒33とモリブデン箔34とリード
線35とを溶接手段により直列に接続して成る一対の電
極マウント32,32が夫々その電極棒33側から挿入
されて、各電極棒33の先端側を放電空間S内に突出さ
せた状態で、ガラス管30の管端部36,36をガスバ
ーナの火炎で加熱しながら圧し潰して密閉状に成形する
ピンチシールや、ガラス管30の管内を負圧にしてその
管端部36,36を径方向に加熱収縮させて密閉状に成
形するシュリンクシール等の加熱クロージング加工によ
り、各管端部36に電極マウント32の電極棒33の後
端側とモリブデン箔34及びリード線35が封着され
て、アークを閉じ込める気密な放電空間Sが形成される
ようになっている。
[0003] In this type of discharge lamp, as shown in FIG. 3, a spherical expanded portion 31 serving as a discharge space S is formed in the center of a glass tube 30 serving as an arc tube material.
0, a pair of electrode mounts 32, 32 formed by connecting an electrode rod 33, a molybdenum foil 34, and a lead wire 35 in series by welding means are inserted from the electrode rod 33 side, respectively. A pinch seal in which the tube ends 36, 36 of the glass tube 30 are crushed and crushed while being heated with a flame of a gas burner to form a hermetically sealed state, with the front end of the glass tube 30 protruding into the discharge space S. The tube ends 36, 36 are heated and shrunk in the radial direction by applying a negative pressure to the tube ends 36, 36 to form a hermetic seal. The side and the molybdenum foil 34 and the lead wire 35 are sealed to form an air-tight discharge space S for confining the arc.

【0004】[0004]

【発明が解決しようとする課題】ところで、電極マウン
ト32を封着したガラス管30のシール部は、点灯中に
おける蒸気分圧が105Pa 〜106Pa 以上の高圧又は超高圧
となる放電空間Sの内圧に耐えて気密性を保持し得る程
度の耐圧性能が要求される。
[SUMMARY OF THE INVENTION Incidentally, the sealing portion of the glass tube 30 was sealed with the electrode mount 32, the discharge space vapor partial pressure during the lighting is 10 5 Pa ~10 6 Pa or more high-pressure or ultrahigh-pressure It is required to have a pressure resistance enough to withstand the internal pressure of S and maintain airtightness.

【0005】このため、電極マウント32には、ガラス
管30の管端部36をシールする際にそのガラス管素材
である石英ガラスに気密性良く封着されるモリブデン箔
34が用いられており、また、リード線35として、気
密性保持に有効なモリブデン製リードワイヤが用いられ
ている。
For this reason, a molybdenum foil 34 that is hermetically sealed to quartz glass as a glass tube material when sealing the tube end 36 of the glass tube 30 is used for the electrode mount 32. As the lead wire 35, a molybdenum lead wire effective for maintaining airtightness is used.

【0006】しかし、シール部の耐圧性能を最も大きく
左右するのは、高圧又は超高圧となる放電空間S内に先
端側を突出させた電極棒33の後端側と石英ガラスとの
封着状態であって、例えば、その電極棒33と石英ガラ
スとの間の気密性を高めるために、ガラス管30の加熱
温度を高めに設定して電極棒33の周りに石英ガラスを
強固に封着させると、徐冷の際に、タングステン等の金
属で成る電極棒33と石英ガラスとの線膨張係数(20℃
において,タングステン 4×10-6:石英ガラス 0.5×10
-6)の違いによって、電極棒周りの石英ガラスに多数の
微細なクラックが生じて耐圧性が損なわれ、点灯中に破
裂する危険性がある。
However, the pressure resistance performance of the seal portion is most greatly influenced by the sealing state between the rear end of the electrode rod 33 whose front end protrudes into the discharge space S where the pressure is high or ultra-high and the quartz glass. For example, in order to increase the airtightness between the electrode rod 33 and the quartz glass, the heating temperature of the glass tube 30 is set to be high and the quartz glass is tightly sealed around the electrode rod 33. And a linear expansion coefficient (20 ° C.) between the electrode rod 33 made of metal such as tungsten and quartz glass during slow cooling.
, Tungsten 4 × 10 -6 : quartz glass 0.5 × 10
Due to the difference of -6 ), a number of fine cracks are generated in the quartz glass around the electrode rod, the pressure resistance is impaired, and there is a risk of explosion during lighting.

【0007】なお、徐冷の際に厳密な温度管理を行え
ば、クラックの発生を抑制することも可能であるが、そ
の温度管理を行うための制御手段は非常に煩雑なものと
なり、また、徐冷作業に長時間を要して放電ランプの生
産効率が著しく低下する。
[0007] If strict temperature control is performed during slow cooling, it is possible to suppress the occurrence of cracks. However, the control means for performing the temperature control becomes very complicated. The slow cooling operation takes a long time, and the production efficiency of the discharge lamp is significantly reduced.

【0008】一方、ガラス管30の加熱温度を低めに設
定すれば、徐冷のための温度管理を簡略化して徐冷時間
も短縮することができるが、電極棒33と石英ガラスと
の封着状態が弱くなって耐圧性が低下すると同時に、そ
の封着部に大きな隙間を生じて気密性が損なわれるおそ
れがある。
On the other hand, if the heating temperature of the glass tube 30 is set lower, the temperature control for slow cooling can be simplified and the slow cooling time can be shortened, but the sealing between the electrode rod 33 and the quartz glass can be performed. At the same time, the state is weakened and the pressure resistance is reduced, and at the same time, there is a possibility that a large gap is formed in the sealing portion and the airtightness is impaired.

【0009】このため、電極棒の表面粗度を指定した
り、酸化処理等の表面処理を施すことによって、その電
極棒に石英ガラスを強固に封着させる提案もなされてい
るが、未だ良好な結果は得られていない。また、ガラス
管30に加工する石英ガラス素管の肉厚を一定にするな
どの製造条件を整えても、一定以上の良好な耐圧性を得
ることは困難であった。
For this reason, it has been proposed that the surface roughness of the electrode rod is specified or that the surface of the electrode rod is subjected to a surface treatment such as an oxidation treatment so that quartz glass is firmly sealed to the electrode rod. No results were obtained. Further, even if manufacturing conditions such as making the thickness of the quartz glass tube to be processed into the glass tube 30 constant are difficult, it is difficult to obtain a good pressure resistance exceeding a certain value.

【0010】そこで本発明は、ガラス管の管端部をシー
ルする際に、その管端部に挿入された電極マウントの電
極棒を気密性良く強固に封着することができ、しかも、
徐冷の際に厳密な温度管理を行わなくてもクラックの発
生を抑制できるようにすることを技術的課題としてい
る。
Therefore, according to the present invention, when the tube end of the glass tube is sealed, the electrode rod of the electrode mount inserted into the tube end can be tightly sealed with good airtightness.
It is a technical problem to suppress the occurrence of cracks without strict temperature control during slow cooling.

【0011】[0011]

【課題を解決するための手段】上記課題を解決するため
に、本発明は、発光管材料となるガラス管の中央に、放
電空間となる拡管部が形成され、そのガラス管の両端か
ら、電極棒とモリブデン箔とリード線とを直列に接続し
て成る一対の電極マウントが、夫々その電極棒側から挿
入されて、当該電極棒の先端側を前記放電空間内に突出
させた状態で、ガラス管の管端部をシールする加熱クロ
ージング加工によってその管端部に封着された放電ラン
プにおいて、前記電極マウントの双方又は一方が、前記
電極棒の後端側に、その電極棒をビーズ穴に通したガラ
スビーズが封着された状態で、ガラス管の管端部に挿入
されて、前記電極棒の後端側が前記ガラスビーズを介し
てガラス管の管端部に封着されていることを特徴とす
る。
In order to solve the above-mentioned problems, according to the present invention, there is provided an expanded tube portion serving as a discharge space in the center of a glass tube serving as an arc tube material, and an electrode is formed from both ends of the glass tube. A pair of electrode mounts formed by connecting a rod, a molybdenum foil, and a lead wire in series are inserted from the electrode rod side, respectively, and a glass is formed in a state in which the tip end side of the electrode rod protrudes into the discharge space. In a discharge lamp sealed at the tube end by a heating closing process for sealing the tube end of the tube, both or one of the electrode mounts is provided at the rear end side of the electrode rod, and the electrode rod is provided at a bead hole. In a state where the passed glass beads are sealed, it is inserted into the tube end of the glass tube, and the rear end side of the electrode rod is sealed to the tube end of the glass tube via the glass beads. Features.

【0012】本発明の放電ランプは、発光管材料となる
ガラス管の管端部を加熱クロージング加工によってシー
ルする際に、その管端部と、その管端部に挿入された電
極マウントの電極棒の後端側とが、当該電極棒に予め封
着されたガラスビーズを介して封着される。
In the discharge lamp of the present invention, when a tube end of a glass tube serving as an arc tube material is sealed by heating closing, the tube end and an electrode rod of an electrode mount inserted into the tube end are sealed. And the rear end side thereof is sealed via glass beads previously sealed to the electrode rod.

【0013】すなわち、ガラス管の管端部が直接封着さ
れるのは、タングステン等の金属で成る電極棒ではな
く、その電極棒に封着されたガラスビーズであり、当該
ガラスビーズとガラス管は相溶性があるので、ガラス管
の管端部をシールする加熱クロージング加工によって気
密性良く強固に封着させることができる。
That is, the end of the glass tube directly sealed is not the electrode rod made of metal such as tungsten, but the glass beads sealed to the electrode rod. Are compatible with each other, so that they can be tightly sealed with good airtightness by heating closing processing for sealing the end of the glass tube.

【0014】また、ガラス管とガラスビーズが、線膨張
係数が等しい同質のガラス素材で成るものであれば、徐
冷の際に両者の封着部にクラックが生ずるおそれはない
ので、クラック防止のための厳密な温度管理を行う必要
がなく、徐冷時間を短縮して放電ランプの生産効率を高
めることができる。
Further, if the glass tube and the glass beads are made of the same glass material having the same coefficient of linear expansion, there is no possibility that cracks will be generated in the sealed portions of the two at the time of slow cooling. Therefore, it is not necessary to perform strict temperature control, and it is possible to shorten the annealing time and increase the production efficiency of the discharge lamp.

【0015】また、ガラスビーズは、予め電極棒に封着
されて、その電極棒との間の気密性が確保されているの
で、ガラス管の管端部を加熱クロージング加工する際
に、そのガラスビーズと電極棒とを互いに封着させる必
要がない。しかも、ガラスビーズが封着された電極棒に
は、ガラス管の管端部を加熱クロージング加工する際の
熱が伝わりにくいので、電極棒とガラスビーズの線膨張
係数の違いによってそのガラスビーズの電極棒周りにク
ラックが生ずるおそれもない。
Further, the glass beads are sealed in advance with the electrode rod to ensure the airtightness between the electrode rod and the electrode rod. There is no need to seal beads and electrode rods together. In addition, since the heat generated during heating and closing the end of the glass tube is not easily transmitted to the electrode rod to which the glass beads are sealed, the difference in the coefficient of linear expansion between the electrode rod and the glass beads causes the electrode of the glass beads to have an electrode. There is no risk of cracks around the bar.

【0016】[0016]

【発明の実施の形態】以下、本発明の実施形態を図面に
よって具体的に説明する。図1は本発明に係る放電ラン
プの一例を示す断面図、図2はその放電ランプに用いる
電極マウントの一例を示す平面図である。
Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a sectional view showing an example of a discharge lamp according to the present invention, and FIG. 2 is a plan view showing an example of an electrode mount used for the discharge lamp.

【0017】図1に示す放電ランプは、発光管材料とな
るガラス管1の中央に、放電空間Sとなる拡管部2が形
成され、そのガラス管1の両端から、タングステン製の
電極棒4とモリブデン箔5とモリブデン製のリード線6
とを直列に接続して成る一対の電極マウント3,3が、
夫々その電極棒4側から挿入されて、当該電極棒4の先
端側を放電空間S内に突出させた状態で、ガラス管1の
管端部7,7を密閉状に成形するピンチシールやシュリ
ンクシール等の加熱クロージング加工により、その管端
部7,7に封着されている。
In the discharge lamp shown in FIG. 1, an expanded tube portion 2 serving as a discharge space S is formed at the center of a glass tube 1 serving as an arc tube material, and an electrode rod 4 made of tungsten is formed from both ends of the glass tube 1. Molybdenum foil 5 and lead wire 6 made of molybdenum
Are connected in series to form a pair of electrode mounts 3, 3,
A pinch seal or a shrink for sealing the tube ends 7, 7 of the glass tube 1 in a state where the end portions of the electrode rods 4 are inserted from the electrode rod 4 side and project into the discharge space S, respectively. The tube ends 7, 7 are sealed by heat closing such as sealing.

【0018】電極マウント3は、図2に示すように、そ
の電極棒4の先端側にタングステン製コイル8が重ね巻
きされると共に、当該電極棒4の後端側に、その電極棒
4をビーズ穴10に通したガラスビーズ9が封着されて
いる。
As shown in FIG. 2, a tungsten coil 8 is wound around the tip of the electrode rod 4 and the electrode rod 4 is beaded on the rear end of the electrode rod 4, as shown in FIG. Glass beads 9 passing through holes 10 are sealed.

【0019】そして、その電極マウント3をガラス管1
の管端部7に図2の如く挿入した状態で、前記加熱クロ
ージング加工を施すことにより、電極棒4の後端側が、
その電極棒4に封着されたガラスビーズ9を介してガラ
ス管1の管端部7に封着されるようになっている。
Then, the electrode mount 3 is connected to the glass tube 1.
By performing the above-mentioned heating closing process in a state of being inserted into the tube end portion 7 as shown in FIG.
The glass tube 1 is sealed to the tube end 7 via the glass beads 9 sealed to the electrode rod 4.

【0020】なお、ガラス管1は、透光性の良い石英ガ
ラスで成り、ガラスビーズ9は、ガラス管1と同質の石
英ガラスを用いてそのガラス管1の管端部7の内径より
も若干小さめの円筒形に成形されている。
The glass tube 1 is made of quartz glass having good translucency. The glass beads 9 are made of quartz glass of the same quality as the glass tube 1 and are slightly smaller than the inner diameter of the tube end 7 of the glass tube 1. It is molded into a small cylindrical shape.

【0021】また、電極マウント3は、電極棒4の後端
をモリブデン箔5の先端に溶接して接続する前に、電極
棒4の後端側をガラスビーズ9のビーズ穴10に通して
当該ビーズ穴10からモリブデン箔5との接続に必要な
溶接代の長さ分だけ突出させた状態で、その電極棒4を
誘導加熱装置等で加熱することにより、その電極棒4の
後端側にガラスビーズ9が気密に封着されている。
Before connecting the rear end of the electrode rod 4 to the front end of the molybdenum foil 5 by welding, the electrode mount 3 passes the rear end of the electrode rod 4 through the bead hole 10 of the glass bead 9. The electrode rod 4 is heated by an induction heating device or the like in a state where the electrode rod 4 is protruded from the bead hole 10 by a length of a welding margin required for connection with the molybdenum foil 5, so that the rear end side of the electrode rod 4 Glass beads 9 are hermetically sealed.

【0022】以上が、図1及び図2に示す放電ランプと
その電極マウントの構成であり、次にそれらの作用につ
いて説明する。電極マウント3が挿入されたガラス管1
の管端部7を加熱クロージング加工によってシールする
際に、その管端部7は、電極棒4に対して直接封着され
ずに、当該電極棒4の後端側に予め封着したガラスビー
ズ9に対して封着される。
The configuration of the discharge lamp and its electrode mount shown in FIG. 1 and FIG. 2 has been described above. Next, their operation will be described. Glass tube 1 with electrode mount 3 inserted
When the tube end 7 is sealed by a heating closing process, the tube end 7 is not directly sealed to the electrode rod 4, and the glass beads previously sealed to the rear end side of the electrode rod 4. 9 is sealed.

【0023】ガラスビーズ9は、ガラス管1と同質の石
英ガラスで作られているので、ガラス管1の管端部7と
ガラスビーズ9は、ピンチシールやシュリンクシールに
よって気密性良く強固に封着することができ、しかも、
その封着部は、徐冷の際に線膨張係数の違いによってク
ラックを生ずるおそれもない。
Since the glass beads 9 are made of quartz glass of the same quality as the glass tube 1, the tube end 7 of the glass tube 1 and the glass beads 9 are tightly and airtightly sealed by a pinch seal or a shrink seal. Can be done, and
The sealing portion does not have a risk of cracking due to a difference in linear expansion coefficient during slow cooling.

【0024】また、ガラスビーズ9は、電極棒4に予め
封着されているので、ガラス管1の管端部7をガスバー
ナ等で加熱してシールする際に、その管端部7をガラス
ビーズ9と電極棒4が封着するほどの高温に加熱する必
要はないし、その管端部7と電極棒4との間にガラスビ
ーズ9が介在することにより、管端部7をシールする際
の熱が電極棒4に伝わりにくいので、ガラスビーズ9の
電極棒4との封着部に線膨張係数の違いによってクラッ
クが生ずるおそれもない。
Since the glass beads 9 are previously sealed to the electrode rod 4, when the tube ends 7 of the glass tube 1 are sealed by heating with a gas burner or the like, the tube ends 7 are sealed with the glass beads. It is not necessary to heat the tube end 9 to such a high temperature that the electrode rod 4 is sealed, and the glass beads 9 are interposed between the tube end 7 and the electrode rod 4 so that the tube end 7 can be sealed. Since heat is not easily transmitted to the electrode rod 4, there is no possibility that cracks may be generated in the sealing portion between the glass beads 9 and the electrode rod 4 due to a difference in linear expansion coefficient.

【0025】したがって、ガラス管1の管端部7が気密
性良くシールされると同時に、そのシール部の耐圧性が
著しく高められる。
Accordingly, the tube end 7 of the glass tube 1 is hermetically sealed, and at the same time, the pressure resistance of the sealed portion is significantly improved.

【0026】なお、本発明の放電ランプは、ガラス管1
の管端部7,7に挿入される電極マウント3,3の一方
にのみガラスビース9が封着されたものであってもよ
い。
It should be noted that the discharge lamp of the present invention has a glass tube 1
The glass beads 9 may be sealed to only one of the electrode mounts 3, 3 inserted into the tube ends 7, 7.

【0027】[0027]

【発明の効果】本発明によれば、発光管のシール部とな
るガラス管の管端部に、その管端部に挿入された電極マ
ウントの電極棒を気密性良く強固に封着することができ
ると同時に、電極棒を封着した箇所にクラックが発生す
ることを確実に防止して、放電ランプの耐圧性能を高め
ることができるという大変優れた効果がある。
According to the present invention, the electrode rod of the electrode mount inserted into the tube end of the glass tube serving as the sealing portion of the arc tube can be tightly sealed with good airtightness. At the same time, there is a very excellent effect that cracks can be reliably prevented from being generated at the places where the electrode bars are sealed, and the pressure resistance of the discharge lamp can be improved.

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

【図1】本発明に係る放電ランプの一例を示す断面図。FIG. 1 is a sectional view showing an example of a discharge lamp according to the present invention.

【図2】本発明に係る電極マウントの一例を示す平面
図。
FIG. 2 is a plan view showing an example of an electrode mount according to the present invention.

【図3】従来の放電ランプを示す断面図。FIG. 3 is a sectional view showing a conventional discharge lamp.

【符号の説明】[Explanation of symbols]

1・・・・・ガラス管 3・・・・・電極マウント 4・・・・・電極棒 5・・・・・モリブデン箔 6・・・・・リード線 7・・・・・ガラス管の管端部 9・・・・・ガラスビーズ 10・・・・・ビーズ穴 1 ... Glass tube 3 ... Electrode mount 4 ... Electrode bar 5 ... Molybdenum foil 6 ... Lead wire 7 ... Glass tube tube End 9 ... Glass beads 10 ... Bead hole

───────────────────────────────────────────────────── フロントページの続き (72)発明者 町 田 敦 埼玉県行田市壱里山町1−1 岩崎電気株 式会社埼玉製作所内 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Atsushi Machida 1-1, Ichiriyama-cho, Gyoda-shi, Saitama Iwasaki Electric Co., Ltd. Saitama Works

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 発光管材料となるガラス管の中央に、放
電空間となる拡管部が形成され、そのガラス管の両端か
ら、電極棒とモリブデン箔とリード線とを直列に接続し
て成る一対の電極マウントが、夫々その電極棒側から挿
入されて、当該電極棒の先端側を前記放電空間内に突出
させた状態で、ガラス管の管端部をシールする加熱クロ
ージング加工によってその管端部に封着された放電ラン
プにおいて、前記電極マウント(3,3)の双方又は一
方が、前記電極棒(4)の後端側に、その電極棒(4)
をビーズ穴(10)に通したガラスビーズ(9)が封着さ
れた状態で、ガラス管(1)の管端部(7)に挿入され
て、前記電極棒(4)の後端側が前記ガラスビーズ
(9)を介してガラス管(1)の管端部(7)に封着さ
れていることを特徴とする放電ランプ。
1. A tube portion serving as a discharge space is formed in the center of a glass tube serving as an arc tube material, and a pair of electrodes formed by connecting an electrode bar, a molybdenum foil, and a lead wire in series from both ends of the glass tube. The electrode mounts are inserted from the electrode rod side, respectively, and in a state where the tip end side of the electrode rod is protruded into the discharge space, the tube end is sealed by heating and closing the tube end of the glass tube. In the discharge lamp sealed in the above, both or one of the electrode mounts (3, 3) is provided on the rear end side of the electrode rod (4) with the electrode rod (4).
Is inserted into the tube end (7) of the glass tube (1) with the glass bead (9) passed through the bead hole (10) sealed, and the rear end side of the electrode rod (4) is A discharge lamp characterized by being sealed to a tube end (7) of a glass tube (1) via glass beads (9).
【請求項2】 電極棒とモリブデン箔とリード線とを直
列に接続して成る電極マウントにおいて、放電ランプの
発光管材料となるガラス管の管端部に挿入してその管端
部に封着される前記電極棒(4)の後端側に、その電極
棒(4)をビーズ穴(10)に通したガラスビーズ(9)
が封着されていることを特徴とする電極マウント。
2. An electrode mount comprising an electrode rod, a molybdenum foil, and a lead wire connected in series, inserted into a tube end of a glass tube serving as a discharge tube material of a discharge lamp and sealed to the tube end. A glass bead (9) having the electrode rod (4) passed through a bead hole (10) is provided on the rear end side of the electrode rod (4).
An electrode mount characterized by being sealed.
JP31988697A 1997-11-20 1997-11-20 Discharge lamp and its electrode mount Pending JPH11154491A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP31988697A JPH11154491A (en) 1997-11-20 1997-11-20 Discharge lamp and its electrode mount

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP31988697A JPH11154491A (en) 1997-11-20 1997-11-20 Discharge lamp and its electrode mount

Publications (1)

Publication Number Publication Date
JPH11154491A true JPH11154491A (en) 1999-06-08

Family

ID=18115344

Family Applications (1)

Application Number Title Priority Date Filing Date
JP31988697A Pending JPH11154491A (en) 1997-11-20 1997-11-20 Discharge lamp and its electrode mount

Country Status (1)

Country Link
JP (1) JPH11154491A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002110090A (en) * 2000-09-28 2002-04-12 Iwasaki Electric Co Ltd Metal vapor discharge lamp and manufacturing method for metal vapor discharge lamp
US7038386B2 (en) 2002-05-28 2006-05-02 Nec Corporation High-pressure discharge lamp and fabrication method of the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002110090A (en) * 2000-09-28 2002-04-12 Iwasaki Electric Co Ltd Metal vapor discharge lamp and manufacturing method for metal vapor discharge lamp
JP4507040B2 (en) * 2000-09-28 2010-07-21 岩崎電気株式会社 Metal vapor discharge lamp and method for producing metal vapor discharge lamp
US7038386B2 (en) 2002-05-28 2006-05-02 Nec Corporation High-pressure discharge lamp and fabrication method of the same

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