JP2629934B2 - High pressure metal vapor discharge lamp - Google Patents
High pressure metal vapor discharge lampInfo
- Publication number
- JP2629934B2 JP2629934B2 JP1019707A JP1970789A JP2629934B2 JP 2629934 B2 JP2629934 B2 JP 2629934B2 JP 1019707 A JP1019707 A JP 1019707A JP 1970789 A JP1970789 A JP 1970789A JP 2629934 B2 JP2629934 B2 JP 2629934B2
- Authority
- JP
- Japan
- Prior art keywords
- sealing
- arc tube
- sealing portion
- electrode
- metal
- 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 - Lifetime
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- Vessels And Coating Films For Discharge Lamps (AREA)
Description
【発明の詳細な説明】 〔発明の目的〕 （産業上の利用分野） 本発明は端部に金属箔を気密に封着する圧潰封止部を
形成してなる高圧金属蒸気放電灯に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to a high-pressure metal vapor discharge lamp having a crushed sealing portion for hermetically sealing a metal foil at an end.
（従来の技術） 一般に水銀ランプやメタルハライドランプ等の高圧金
属蒸気放電灯の発光管は石英ガラス製発光管バルブの端
部を扁平に圧潰封止し，この封止部に一端に電極を他端
に外部リード線を接続してなる高融点金属たとえばモリ
ブデンからなる金属箔を気密に封着して形成されてい
る。(Prior Art) Generally, the arc tube of a high-pressure metal vapor discharge lamp such as a mercury lamp or a metal halide lamp has a flat end crushed and sealed at the end of an arc tube bulb made of quartz glass. A metal foil made of a high-melting point metal such as molybdenum, which is connected to an external lead wire, is hermetically sealed.
すなわち，上記電極と外部リード線とをそれぞれ接続
した金属箔を石英ガラス製発光管バルブの端部に管軸に
沿つて配置し，上記管端部を加熱軟化したのち，その両
側面を一対の押圧面がほぼ平坦な金型にて扁平に圧潰す
ることによつて，圧潰成形された封止部内に上記金属箔
を気密に封着することが一般に行なわれている。したが
つて，成形された封止部は扁平面同士が平行して全体に
亘つて均一な厚さとなつている。That is, a metal foil connecting the electrode and the external lead wire is arranged along the tube axis at the end of the quartz glass arc tube bulb, and the tube end is heated and softened. It is a common practice to hermetically seal the metal foil in a crush-formed sealing portion by crushing flat with a mold having a substantially flat pressing surface. Therefore, the molded sealing portion has a uniform thickness throughout the parallel flat surfaces.
ところで，たとえばメタルハライドランプは発光管内
に始動用希ガス，水銀と共に金属ハロゲン化物が封入し
てあり，点灯時には水銀の発光に加え，ハロゲン化物と
して封入した金属を発光させることにより，高効率でか
つ高演色性の発光特性が得られるものである。By the way, for example, in a metal halide lamp, a metal halide is sealed together with a starting rare gas and mercury in an arc tube. When the metal halide lamp is lit, the metal enclosed as a halide emits light in addition to the emission of mercury, thereby achieving high efficiency and high efficiency. Light emission characteristics of color rendering properties can be obtained.
上記金属ハロゲン化物は点灯時に蒸発する量よりも過
剰に封入されており，発光効率に影響するその蒸気圧は
発光管の最冷部温度によつて決まる。The metal halide is sealed in excess of the amount that evaporates at the time of lighting, and the vapor pressure that affects the luminous efficiency is determined by the temperature of the coldest part of the arc tube.
したがつて，発光効率を上げるためには，いかにして
発光管の最冷部温度を高めるかが重要な問題となつてく
る。一般にメタルハライドランプはそのような目的のた
めに水銀ランプと較べ管壁負荷を高めている。このよう
な傾向はランプが小形になるほど顕著となる。この理由
は発光管を小形化する場合に，気密封着用の金属箔の大
きさは電流容量等の関係でそれ程縮少化することはでき
ず，したがつてこの金属箔を封着する部分の発光管封止
部の大きさもまた発光管本体である放電部ほどには縮小
化できず，中〜大形ランプに比較して封止部からの熱損
失は相対的に大きくなることが避けられなかつた。この
封止部からの熱損失を補うため上記のように管壁負荷を
高めることが必要であつた。Therefore, in order to increase the luminous efficiency, how to raise the temperature of the coldest part of the arc tube becomes an important problem. In general, metal halide lamps have increased tube wall loads compared to mercury lamps for such purposes. Such a tendency becomes more remarkable as the lamp becomes smaller. The reason for this is that when the arc tube is miniaturized, the size of the metal foil to be hermetically sealed cannot be reduced so much due to the current capacity, etc., and therefore, the area where the metal foil is sealed is The size of the sealed part of the arc tube cannot be reduced as much as that of the discharge part, which is the main body of the arc tube, and the heat loss from the sealed portion can be avoided to be relatively large as compared with a medium to large lamp. Never In order to compensate for the heat loss from the sealing portion, it is necessary to increase the tube wall load as described above.
これに伴ない点灯中の発光管内圧も非常に高くなり，
たとえば100W級のメタルハライドランプでは約10気圧,4
00W級では約20気圧にも達する。したがつて，発光管の
耐圧は重要であり，高い耐圧性と共に多量生産に際して
は個々のランプ間の変動を小さくすることも要求され
る。As a result, the internal pressure of the arc tube during lighting becomes extremely high,
For example, for a 100 W class metal halide lamp,
In the 00W class, it reaches about 20 atm. Therefore, the pressure resistance of the arc tube is important, and it is required to reduce the fluctuation between individual lamps in high-volume production as well as high pressure resistance.
さらに発光管内に封入された金属ハロゲン化物が封止
部に封着された電極の電極軸と封止部ガラスとの間隙に
侵入して発光に寄与する発光管内の金属量が減少して発
光特性を低下させたり，また通常モリブデンからなる上
記金属箔部分にまで達してこれと反応し，電極軸と金属
箔との接合部を破壊して導通不良を生じて不点となる等
の不都合を発生させることがある。In addition, the metal halide enclosed in the arc tube penetrates into the gap between the electrode axis of the electrode sealed in the sealing portion and the glass of the sealing portion, and the amount of metal in the arc tube contributing to light emission decreases, resulting in emission characteristics. The metal foil, which usually consists of molybdenum, reacts with the metal foil and destroys the joint between the electrode shaft and the metal foil. May be caused.
このような不都合を除くには，電極軸と封止部ガラス
との隙間を小さくすること，特に封止端部における隙間
を小さくすることが望ましい。しかしながら，上記従来
の封止部形状つまり扁平面が平行で封止部厚さが全体に
亘つて均一なものでは上記隙間を小さくするには限界が
あつた。すなわち，隙間を小さくするには封止部形成工
程において，上記一対の押圧金型の押圧時における距離
を挾く，つまりより強く押圧すれば良いわけであるが，
あまり強く押圧し過ぎると金属箔の箔切れを生じたり，
あるいは電極軸と封止部ガラスとが緊密に封着し過ぎ
て，反えつて通常タングステンからなる電極軸と石英ガ
ラスとの熱膨張率の差によつて封着部にクラツクを発生
することになりかねず，好ましい封止部の形成には困難
がつきまとつていた。In order to eliminate such inconvenience, it is desirable to reduce the gap between the electrode shaft and the sealing glass, and particularly to reduce the gap at the sealing end. However, there is a limit in reducing the gap if the conventional sealing portion shape, that is, the flat surface is parallel and the sealing portion thickness is uniform over the whole. That is, in order to reduce the gap, in the sealing portion forming step, the distance at the time of pressing the pair of pressing dies should be sandwiched, that is, the pressing should be performed more strongly.
Pressing too hard may cause the metal foil to break,
Alternatively, the electrode shaft and the sealing portion glass are too tightly sealed, and a crack is generated in the sealing portion due to a difference in thermal expansion coefficient between the electrode shaft and the quartz glass, which are usually made of tungsten. As a matter of fact, it has been difficult to form a preferable sealing portion.
（発明が解決しようとする課題） 従来の高圧金属蒸気放電灯の発光管は，上記したよう
に封止部の電極軸と封止部のガラスとの隙間を小さくし
て電極軸と金属箔との接合部の破壊を防止するために，
押圧金型を強く押圧すると金属箔の箔切れが発生した
り，封着部にクラツクが発生したりする問題があつた。(Problems to be Solved by the Invention) As described above, the arc tube of the conventional high-pressure metal vapor discharge lamp is configured such that the gap between the electrode axis of the sealing portion and the glass of the sealing portion is reduced to reduce the gap between the electrode axis and the metal foil. In order to prevent the destruction of the joint of
When the pressing die is pressed strongly, there has been a problem that the metal foil is broken or cracks are generated in the sealing portion.
本発明は上記した従来の高圧金属蒸気放電灯の発光管
の問題を防止する課題に対してなされたもので，発光管
封止部の強度が大きく，かつ製造が容易な高圧金属蒸気
放電灯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-described problem of preventing the problem of the arc tube of the conventional high-pressure metal vapor discharge lamp. The purpose is to provide.
（課題を解決するための手段） 本発明は発光管バルブの端部に扁平に圧潰した封止部
を形成し，この封止部に一端に電極を他端に外部リード
線を接続した金属箔を気密に封着する高圧金属蒸気放電
灯において，上記扁平な圧潰封止部の厚さを上記電極の
電極軸封止端側を徐々に薄く、外部リード線の封止部側
を徐々に厚く形成したことを特徴とするものである。(Means for Solving the Problems) The present invention provides a metal foil in which a flat crushed sealing portion is formed at an end of an arc tube bulb, and an electrode is connected to one end of the sealing portion and an external lead wire is connected to the other end. In a high-pressure metal vapor discharge lamp that hermetically seals, the thickness of the flat crushed sealing portion is gradually reduced at the electrode shaft sealing end side of the electrode, and gradually increased at the sealing portion side of the external lead wire. It is characterized by having been formed.
（作 用） 本発明高圧金属蒸気放電灯は，一端に電極を他端に外
部リード線を接続した金属箔を気密に封着した封止部の
厚さが，電極封止端側は徐々に薄く、外部リード線の封
止部側は徐々に厚く形成されている。このように構成す
ると封止部の押圧力は電極軸の封止部側が最も強く、外
部リード線の封止部側にいくにしたがって次第に弱くな
るので、封止部内の電極軸および金属箔の金属部材に対
して極端な応力集中箇所がなくなるため、封止部の途中
で電極軸の熱膨張に起因する封止部のクラックが発生す
ることが生じにくくなる。電極の封止端側で封止部ガラ
スとの間隙が極めて小さくなり，発光管内封入物が間隙
に侵入することを防止でき，発光金属量が減少して発光
特性が低下したり，金属箔と電極軸との接合部が破壊す
るような事故が減少する。また，封止部の大部分が電極
軸の封止端側ほどには強い力で押圧されないから金属箔
の箔切れが生じず，電極軸の封止端側を除く大部分が封
止部ガラスと適当な隙間を保持でき，熱膨張差によるク
ラツクの発生が防止できる。(Operation) In the high-pressure metal vapor discharge lamp of the present invention, the thickness of the sealing portion in which a metal foil in which an electrode is connected to one end and an external lead wire is connected to the other end in an airtight manner is gradually increased at the electrode sealing end side. The outer lead wire is formed to be gradually thicker at the sealing portion side. With this configuration, the pressing force of the sealing portion is strongest on the sealing portion side of the electrode shaft, and gradually becomes weaker toward the sealing portion side of the external lead wire. Since there are no places where extreme stress is concentrated on the member, cracks in the sealing portion due to thermal expansion of the electrode shaft in the middle of the sealing portion are less likely to occur. The gap between the sealing end of the electrode and the sealing glass becomes extremely small, preventing the inclusions in the arc tube from entering the gap, reducing the amount of luminescent metal and reducing the luminescent characteristics, and Accidents such as breakage of the joint with the electrode shaft are reduced. In addition, since most of the sealing portion is not pressed with a strong force as much as the sealing end side of the electrode shaft, the metal foil does not break, and most of the sealing portion of the electrode shaft except the sealing end side is sealed glass. And an appropriate gap can be maintained, and occurrence of cracks due to a difference in thermal expansion can be prevented.
（実施例） 以下，本発明の詳細を図示の実施例を参照して説明す
る。第３図は100Wの小形メタルハライドランプの発光管
を示し，（１）は内径約10.5mm,肉厚約1.5mmの石英ガラ
スからなる発光管バルブで，その内部には始動用希ガス
としてたとえばアルゴンガスが100トール，水銀20mg,ス
カンジウムメタル0.1mgおよび金属ハロゲン化物として
よう化スカンジウムとよう化ナトリウムが合計で10mg封
入されている。（2a），（2b）は発光管バルブ（１）の
両端に距離約17mmを隔だてて対向設置された一対の電極
で，（３）は一方の電極（2a）に近接して設けられた補
助電極である。これら各電極（2a），（2b），（３）は
発光管バルブ（１）の端部を扁平に圧潰してなる封止部
（４），（５）に気密に封着された高融点金属たとえば
モリブデンからなる金属箔（6a），（6b），（6c）を介
して外部リード線（7a），（7b），（7c）にそれぞれ接
続している。(Examples) Hereinafter, details of the present invention will be described with reference to the illustrated examples. FIG. 3 shows an arc tube of a small metal halide lamp of 100 W. (1) is an arc tube bulb made of quartz glass having an inner diameter of about 10.5 mm and a thickness of about 1.5 mm. The gas contains 100 torr, 20 mg of mercury, 0.1 mg of scandium metal, and a total of 10 mg of scandium iodide and sodium iodide as metal halides. (2a) and (2b) are a pair of electrodes opposed to each other at a distance of about 17 mm at both ends of the arc tube bulb (1), and (3) is provided near one electrode (2a). Auxiliary electrode. Each of these electrodes (2a), (2b), and (3) is a high melting point airtightly sealed to sealing portions (4) and (5) formed by flattening the ends of the arc tube bulb (1). They are connected to external lead wires (7a), (7b) and (7c) via metal foils (6a), (6b) and (6c) made of metal, for example, molybdenum.
次に，上記封止部（４），（５）の形状，構造につい
て第１図および第２図を参照して説明する。両図は説明
の便宜上封止部の一方（４）のみを示し，第１図は斜視
図，第２図は縦断面図である。図示のように扁平に圧潰
した封止部（４）の厚さ，つまり扁平面（4a）と（4b）
とで挾さまれる（4c）の厚さは電極（2a）の電極軸
（８）の封止端（９）側の厚さａが3.4mm,外部リード線
（7a）の封止端（10）側の厚さｂが4.5mmで，電極軸封
止端（９）側の厚さが外部リード線封止端（10）側の厚
さよりも薄くなるように，たとえて言えばハの字形に形
成してある。なお，上記両封止端（９），（10）間の距
離ｄは10.5mmとしたから，（ｂ−ａ）/2d＝0.052とな
る。Next, the shapes and structures of the sealing portions (4) and (5) will be described with reference to FIG. 1 and FIG. Both figures show only one of the sealing portions (4) for convenience of explanation, FIG. 1 is a perspective view, and FIG. 2 is a longitudinal sectional view. The thickness of the sealing portion (4) crushed flat as shown in the figure, ie, the flat surfaces (4a) and (4b)
The thickness of (4c) sandwiched by the above is that the thickness (a) of the electrode (2a) on the sealing end (9) side of the electrode shaft (8) is 3.4 mm, and the sealing end (10) of the external lead wire (7a) is ) Side thickness b is 4.5mm, and the thickness of the electrode shaft sealing end (9) side is smaller than the thickness of the external lead wire sealing end (10) side. It is formed in. Since the distance d between the sealing ends (9) and (10) was 10.5 mm, (ba) /2d=0.052.
このように厚さが不均一な封止部（４）を形成するに
は，一端に電極（2a）の電極軸（８）を，他端に外部リ
ード線（7a）を接続した金属箔（6a）を発光管バルブ
（１）の開口端部に同軸的に配置し，上記開口端部を加
熱軟化したのち，一対の押圧金型によつて扁平に圧潰し
て封止するわけであるが，この時の押圧力を電極軸
（８）の封止端（９）側を最も強くし，外部リード線
（7a）の封止端（10）側にいくにしたがつて次第に弱く
なるようにすれば良い。たとえば，一対の押圧金型の押
圧面同士が平行することなくハの字形になるように対設
しておけば良い。In order to form the sealing portion (4) having such an uneven thickness, a metal foil (8) having one end connected to the electrode shaft (8) of the electrode (2a) and the other end connected to the external lead wire (7a) is used. 6a) is disposed coaxially with the open end of the arc tube bulb (1), and after the above open end is heated and softened, it is crushed flat by a pair of pressing dies and sealed. The pressing force at this time should be the strongest on the sealed end (9) side of the electrode shaft (8), and gradually become weaker toward the sealed end (10) side of the external lead wire (7a). Just do it. For example, the pressing surfaces of a pair of pressing dies may be provided so as to form a C shape without being parallel.
このようにして形成された封止部（４）は電極軸
（８）の封止端（９）側では封止部ガラスとの間隙を極
めて小さくすることができる。すなわち，従来上記間隙
は電極軸（８）断面積に対して８％近くもあつたもの
が，本実施例によれば約1.5％にも縮小することができ
た。したがつて，発光管内封入物たとえば金属ハロゲン
化物が上記間隙に侵入して発光管内の発光金属量が減少
して発光特性を低下したり金属箔（6a）にまで達して電
極軸（８）との接合部を破壊し，ランプを不点とする事
故等を防ぐことができ，また点灯時に急上昇する発光管
内圧力が急激に封止部（４）内にかかつてこれを破壊す
るような事故を減少させることができる。しかも，封止
部（４）の大部分は電極軸（８）の封止端（９）側ほど
には強い力で押圧されないので，金属箔（6a）が箔切れ
を生じるようなことはなく，さらに封止端（９）側を除
く大部分の電極軸（８）は過度に封止部ガラスと封着す
ることが避けられ適当な隙間（11）を保持できるので，
両者の熱膨張率の差による封着部のガラスのクラツク発
生も防止できる。The sealing portion (4) thus formed can have a very small gap with the sealing portion glass on the sealing end (9) side of the electrode shaft (8). That is, the gap is conventionally about 8% of the sectional area of the electrode shaft (8), but can be reduced to about 1.5% according to the present embodiment. Therefore, the inclusion in the arc tube, for example, a metal halide, enters the gap and reduces the amount of the luminous metal in the arc tube, thereby deteriorating the luminous characteristics or reaching the metal foil (6a) and the electrode shaft (8). Can be prevented from breaking the joint of the lamp and making the lamp inconsistent. In addition, the pressure inside the arc tube, which suddenly rises when the lamp is lit, suddenly breaks into the sealing part (4). Can be reduced. Moreover, most of the sealing portion (4) is not pressed with a strong force as much as the sealing end (9) side of the electrode shaft (8), so that the metal foil (6a) does not break. In addition, most of the electrode shafts (8) except for the sealing end (9) side can be prevented from being excessively sealed with the sealing glass and can maintain a suitable gap (11).
The occurrence of cracks in the glass at the sealing portion due to the difference between the two coefficients of thermal expansion can also be prevented.
次に上記実施例の発光管と，封止部の扁平面同士が平
行で全体の厚さが均一である以外は全て実施例と同じ従
来の発光管各10個につき行なつた耐圧試験の結果を述べ
る。Next, the same results as in the above example except that the arc tube of the above-described embodiment and the flat surface of the sealing portion are parallel to each other and the entire thickness is uniform, and the results of the withstand voltage test performed on each of the 10 conventional arc tubes. State.
試験方法は発光管内に空気圧を加え，その圧力を徐々
に増加させて発光管が破損した圧力を測定した。実施例
の発光管は平均55気圧（最低40気圧，最高63気圧）であ
つたのに対し，従来のものは平均40気圧（最低23気圧，
最高58気圧）で，本発明によれば耐圧性を著るしく向上
することができ，しかもそのバラツキも少なくて均質な
発光管が得られることが判る。In the test method, air pressure was applied to the arc tube, the pressure was gradually increased, and the pressure at which the arc tube was broken was measured. The arc tube of the embodiment had an average of 55 atm (minimum 40 atm, maximum 63 atm), whereas the conventional one had an average of 40 atm (minimum 23 atm,
At a pressure of 58 atm), according to the present invention, the pressure resistance can be remarkably improved, and it can be seen that a uniform arc tube with little variation can be obtained.
次に電極軸封止端側の薄肉部（厚さａ）と外部リード
線封止端側の厚肉部（厚さｂ）とがなす封止部扁平面
（4a），（4b）の管軸方向（距離ｄ）における傾斜角度
（ｂ−ａ）/2dを種々変えた各種発光管を作製して効果
（発光管特にその封止部の強度つまり，耐圧性やハロゲ
ン化物による電極軸と金属箔との接合部の破壊防止）と
の関係を調べた。なお，傾斜角度（ｂ−ａ）/2dの設定
については，封止部形成時に使用する一対の押圧金型の
対向する押圧面の対向角度を変化させること等によつて
行ない，（ｂ−ａ）/2dの値が0.017,0.035,0.070,0.105
の各値になるようにした。Next, the tubes of the flat portions (4a) and (4b) formed by the thin portions (thickness a) on the electrode shaft sealing end side and the thick portions (thickness b) on the external lead wire sealing end side The effect of producing various arc tubes in which the inclination angle (ba) / 2d in the axial direction (distance d) is variously changed (strength of the arc tube, especially the sealing portion, ie, pressure resistance, and the electrode shaft and metal due to halide) (Prevention of destruction of the joint with the foil). The inclination angle (ba) / 2d is set by changing the facing angle of the facing pressing surfaces of a pair of pressing dies used for forming the sealing portion, for example, by (ba). ) / 2d is 0.017,0.035,0.070,0.105
Of each value.
この結果，上記値が0.035と0.070（上記実施例は0.05
2）のものは実施例とほぼ同等の効果を得ることができ
たが,0.017と傾斜角度が小さ過ぎるものは従来の封止部
の厚さが均一なものにその形状が近く，したがつて顕著
な効果は得られず，一方0.105と傾斜角度の大き過ぎる
ものは，封止工程において溶融ガラスの厚肉側への流れ
が大きくなり過ぎて金属箔（6a）に変形をきたし，それ
につれて金属箔（6a）に接続している電極（2a）の位置
も変動し，この結果対向電極（2b）との距離が不定とな
つて均一なランプ特性が得られにくくなつたり，上記金
属箔（6a）の変形によつて気密な封止部が得られにくく
なる等の欠点を生じる。したがつて， 0.035≦（ｂ−ａ）/2d≦0.070 の範囲に設定することが望ましい。As a result, the above values were 0.035 and 0.070 (in the above example, 0.05
In the case of 2), almost the same effect as in the example could be obtained, but in the case where the inclination angle was too small as 0.017, the shape was close to that of the conventional one with the uniform thickness of the sealing part. If the inclination angle is too large, 0.105, on the other hand, if the angle of inclination is too large, the flow of molten glass to the thick side will be too large in the sealing process, causing deformation of the metal foil (6a), and the metal The position of the electrode (2a) connected to the foil (6a) also fluctuates. As a result, the distance from the counter electrode (2b) becomes indefinite, making it difficult to obtain uniform lamp characteristics. Defects such as the difficulty in obtaining an airtight seal due to the deformation in ()) occur. Therefore, it is desirable to set the range of 0.035 ≦ (ba) /2d≦0.070.
第４図および第５図はそれぞれ変形例を示し，上記実
施例と同一個所は同一符号を付して説明は省略する。第
４図のように外部リード線（7a）の封止端側の封止部コ
ーナー（12），（12）が丸味をもつている場合には,bの
位置は封止端部ではなく図示のように最大肉厚を有する
個所とする。また，第５図の場合には，外部リード線
（7a）の封止端側をも封止工程で強く押圧することによ
つて肉薄部（13）を形成し外部リード線（7a）と封止部
ガラスとの封着性をよくしたもので，これは上記実施例
においてｂの値を最大限にしたような場合，外部リード
線（7a）と封止部ガラスとの間隙は大きく，外部リード
線（7a）の封着直後の酸化あるいは外管内に組込む発光
管マウント時に外部リード線（7a）を折り曲げ加工する
場合に折損しやすい等の欠点解消に有効である。FIG. 4 and FIG. 5 each show a modified example. As shown in FIG. 4, if the corners (12) and (12) of the external lead wire (7a) on the sealing end side are rounded, the position of b is not the sealing end but shown. Where the thickness is the maximum. In the case of FIG. 5, the sealing end side of the external lead wire (7a) is also strongly pressed in the sealing step to form a thin portion (13), and the external lead wire (7a) is sealed. In the above embodiment, when the value of b was maximized, the gap between the external lead wire (7a) and the sealing glass was large, and the sealing property with the sealing glass was large. This is effective for eliminating defects such as oxidization immediately after the sealing of the lead wire (7a) or breakage when the external lead wire (7a) is bent when the arc tube is mounted in the outer tube.
なお，発光管形状には一端封止形と上記実施例のよう
に両端封止形とがあるが，いずれの封止部にも本発明を
適用することが望ましい。The shape of the arc tube includes a one-end sealed type and a two-end sealed type as in the above embodiment. It is desirable to apply the present invention to any of the sealed portions.
また，本発明は上記小形メタルハライドランプに限ら
れるものではなく，中〜大形のメタルハライドランプ特
に発光管内封入物の点灯時における蒸気圧を高める高効
率タイプあるいは水銀ランプ等の他の高圧金属蒸気放電
灯に適用することもできる。Further, the present invention is not limited to the small metal halide lamps described above, but is a medium- to large-sized metal halide lamp, in particular, a high-efficiency type for increasing the vapor pressure at the time of lighting the enclosure in the arc tube or another high-pressure metal vapor discharge lamp such as a mercury lamp. It can also be applied to electric lights.
〔発明の効果〕 以上詳述したように本発明によれば，発光管の扁平に
圧潰した封止部の厚さを，電極軸の封止端側を薄く，外
部リード線の封止端側を厚くなるように形成するだけの
簡単な手段によつて，発光管内封入物の封止部内への侵
入や点灯時に高圧となる発光管内圧力による封止部の破
壊等に対して耐性のある程度の大きな封止部を有する高
圧金属蒸気放電灯を得ることができる。[Effects of the Invention] As described in detail above, according to the present invention, the thickness of the flattened sealing portion of the arc tube is reduced by reducing the sealing end side of the electrode shaft and the sealing end side of the external lead wire. By using a simple means that is only thickened, a certain degree of resistance to intrusion of the enclosure inside the arc tube into the sealed portion and destruction of the sealed portion due to the high pressure inside the arc tube during lighting. A high-pressure metal vapor discharge lamp having a large sealing portion can be obtained.
第１図は本発明の一実施例であるメタルハライドランプ
発光管の一端封止部の斜視図，第２図は同じく縦断面
図，第３図は同じく発光管全体の縦断面図，第４図およ
び第５図はそれぞれ変形例の要部である一端封止部の正
面図を示す。 （１）……発光管バルブ， （2a），（2b）……電極， （４），（５）……封止部， （4a），（4b）……封止部扁平図， （4c）……（4a），（4b）で挾さまれる層， （6a），（6b），（6c）……金属箔， （7a），（7b），（7c）……外部リード線， （８）……電極軸， （９）……封止部の電極軸封止端， （10）……封止部の外部リード線封止端FIG. 1 is a perspective view of one end sealing portion of a metal halide lamp arc tube according to an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of the same, FIG. 3 is a longitudinal sectional view of the entire arc tube, and FIG. FIG. 5 and FIG. 5 are front views of a one-end sealing portion, which is a main portion of a modification. (1) ... arc tube bulb, (2a), (2b) ... electrode, (4), (5) ... sealed part, (4a), (4b) ... sealed part flat view, (4c) ) ... Layers sandwiched between (4a) and (4b), (6a), (6b), (6c) ... Metal foil, (7a), (7b), (7c) ... External lead wires, ( 8)… electrode shaft, (9)… electrode shaft sealing end of sealing part, (10)… external lead wire sealing end of sealing part
───────────────────────────────────────────────────── フロントページの続き (72)発明者 佐野 久則 神奈川県横須賀市船越町１―201―１ 株式会社東芝横須賀工場内 (56)参考文献 特開 昭57−40852（ＪＰ，Ａ) 実開 昭51−57563（ＪＰ，Ｕ) 実開 昭59−115556（ＪＰ，Ｕ) 実公 昭50−19895（ＪＰ，Ｙ１) ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hisanori Sano 1-12-1 Funakoshi-cho, Yokosuka City, Kanagawa Prefecture Inside Yokosuka Plant, Toshiba Corporation (56) References JP-A-57-40852 (JP, A) Sho Akai 51-57563 (JP, U) Shokai Sho 59-115556 (JP, U) Shoko 50-19895 (JP, Y1)
Claims (1)
封止部に、一端に電極を他端に外部リード線を接続した
金属箔を気密に封着し、上記封止部の厚さを電極封止端
側は徐々に薄く、外部リード線封止部側は徐々に厚く形
成したことを特徴とする高圧金属蒸気放電灯。A metal foil having an electrode connected to one end and an external lead wire connected to the other end is hermetically sealed in a sealing portion formed by flattening the end of an arc tube bulb. A high-pressure metal vapor discharge lamp characterized in that the thickness is gradually reduced on the electrode sealing end side and gradually increased on the external lead wire sealing section side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1019707A JP2629934B2 (en) | 1989-01-31 | 1989-01-31 | High pressure metal vapor discharge lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1019707A JP2629934B2 (en) | 1989-01-31 | 1989-01-31 | High pressure metal vapor discharge lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01281655A JPH01281655A (en) | 1989-11-13 |
| JP2629934B2 true JP2629934B2 (en) | 1997-07-16 |
Family
ID=12006755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1019707A Expired - Lifetime JP2629934B2 (en) | 1989-01-31 | 1989-01-31 | High pressure metal vapor discharge lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2629934B2 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2965698A (en) * | 1956-08-30 | 1960-12-20 | Gen Electric | Quartz tube pinch seal |
| JPS5318156Y2 (en) * | 1973-06-25 | 1978-05-15 | ||
| JPS5421430Y2 (en) * | 1974-10-31 | 1979-07-30 | ||
| JPS5740852A (en) * | 1980-08-22 | 1982-03-06 | Toshiba Corp | Metal halide lamp |
| JPS59115556U (en) * | 1983-01-25 | 1984-08-04 | 岩崎電気株式会社 | high pressure metal vapor discharge lamp |
-
1989
- 1989-01-31 JP JP1019707A patent/JP2629934B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01281655A (en) | 1989-11-13 |
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| EXPY | Cancellation because of completion of term |