JPS6231973Y2 - - Google Patents
Info
- Publication number
- JPS6231973Y2 JPS6231973Y2 JP1978058999U JP5899978U JPS6231973Y2 JP S6231973 Y2 JPS6231973 Y2 JP S6231973Y2 JP 1978058999 U JP1978058999 U JP 1978058999U JP 5899978 U JP5899978 U JP 5899978U JP S6231973 Y2 JPS6231973 Y2 JP S6231973Y2
- Authority
- JP
- Japan
- Prior art keywords
- coil
- electrode rod
- inner coil
- outer coil
- 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
Links
- 229910001507 metal halide Inorganic materials 0.000 claims description 8
- 150000005309 metal halides Chemical class 0.000 claims description 8
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 4
- 229910052753 mercury Inorganic materials 0.000 claims description 4
- ZCUFMDLYAMJYST-UHFFFAOYSA-N thorium dioxide Chemical compound O=[Th]=O ZCUFMDLYAMJYST-UHFFFAOYSA-N 0.000 claims description 3
- 229910003452 thorium oxide Inorganic materials 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Discharge Lamp (AREA)
Description
【考案の詳細な説明】
本考案は発光管内に水銀と金属ハロゲン化物を
封入してなるメタルハライドランプの改良に関す
るものである。[Detailed Description of the Invention] The present invention relates to an improvement of a metal halide lamp in which mercury and a metal halide are sealed in an arc tube.
メタルハライドランプに用いられる電極は、消
灯時に金属ハロゲン化物が電極上のエミツタの表
面に凝集することを防止するために、エミツタを
含まない外側コイルとエミツタを含む内側コイル
から構成されることは公知である。この一例とし
て、第１図に示す構造が採用されている。この構
造では、内側コイル２が外側コイル１とほぼ接し
ているので、点灯中、最も高温になる外側コイル
の熱が容易に内側コイル２に伝導されることと、
断面積が大きく、熱の良導体となる電極棒３と内
側コイル２が下端で接しているにすぎないため、
熱の伝導が悪くなることの２つの理由によつて、
内側コイル２の温度が高くなり、エミツタの過度
の温度上昇によつて、エミツタの蒸発、飛散が多
くなるし、ThO2を含有するエミツタではThO2の
還元が促進されて、発光管内壁の黒化を促進する
結果となる。 It is well known that the electrodes used in metal halide lamps are composed of an outer coil that does not contain an emitter and an inner coil that includes an emitter in order to prevent metal halides from condensing on the surface of the emitter on the electrode when the lamp is turned off. be. As an example of this, the structure shown in FIG. 1 is adopted. In this structure, since the inner coil 2 is almost in contact with the outer coil 1, the heat of the outer coil, which reaches the highest temperature during lighting, is easily conducted to the inner coil 2.
Since the electrode rod 3, which has a large cross-sectional area and is a good conductor of heat, and the inner coil 2 only touch at the lower end,
Due to two reasons, heat conduction becomes poor.
The temperature of the inner coil 2 increases, and the excessive temperature rise of the emitter increases the evaporation and scattering of the emitter, and the reduction of ThO 2 is promoted in the emitter containing ThO 2 , causing blackening of the inner wall of the arc tube. This results in the promotion of
本考案はかかる点を改善し、動程特性の良好な
メタルハライドランプを提供することを目的とす
るものである。 The object of the present invention is to improve these points and provide a metal halide lamp with good stroke characteristics.
以下に本考案の実施例を図面とともに説明す
る。 Embodiments of the present invention will be described below with reference to the drawings.
第２図において、この実施例の電極は、酸化ト
リウムを含むエミツタを含有する内側コイル５の
外径ｄが外側コイル４の内径Ｄよりも小さくなる
ように構成されている。このため、点灯中、最も
高温になる外側コイル４の先端部の熱は直接内側
コイル５に伝導されず、エミツタの過度の温度上
昇が防止される。また、電極棒６の先端は外側コ
イル４の開放端から突出しない位置に配されてい
る。さらに、電極棒６は、内側コイル５のほぼ全
長にわたつて貫通し、この電極棒６に内側コイル
５が固定されているので、この電極棒６の良好な
熱伝導性によつて内側コイル５、ひいてはエミツ
タの温度を低下させることが出来る。 In FIG. 2, the electrode of this embodiment is constructed such that the outer diameter d of the inner coil 5 containing the emitter containing thorium oxide is smaller than the inner diameter D of the outer coil 4. Therefore, during lighting, the heat at the tip of the outer coil 4, which reaches the highest temperature, is not directly conducted to the inner coil 5, and an excessive rise in temperature of the emitter is prevented. Further, the tip of the electrode rod 6 is arranged at a position that does not protrude from the open end of the outer coil 4. Further, since the electrode rod 6 penetrates almost the entire length of the inner coil 5 and the inner coil 5 is fixed to the electrode rod 6, the electrode rod 6 has good thermal conductivity. Therefore, the temperature of the emitter can be lowered.
本考案実施例において、電極棒６を外側コイル
４の大径部側の先端よりも突出させない構造とし
たのは次の理由による。もし、電極棒６を外側コ
イル４の先端よりも突出させると、アークスポツ
トが該電極棒上に形成され、内側コイル５とエミ
ツタの温度を過度に上昇させる結果となるからで
ある。電極棒６を外側コイル４の先端よりも突出
させない場合は、アークスポツトは外側コイル５
の先端に形成される。また、本考案実施例のよう
な電極構造を採用する場合、内側コイルの厚みが
重要となる。すなわち、電極棒と外側コイルの間
に内側コイルを挿入し、Ｄ／ｄ＞１になるよう
に、内側コイルと外側コイルの間に間隙を設けた
構造とするためである。したがつて本考案の実施
例で採用した内側コイルは、従来電極のような二
層コイルではなく、単層のトリプルコイルであ
る。トリプルコイルを用いることによつて、内側
コイルに含有させるエミツタの付着量を従来電極
の二層コイルとほぼ同量とすることができた。 In the embodiment of the present invention, the structure is such that the electrode rod 6 does not protrude beyond the tip of the large diameter portion of the outer coil 4 for the following reason. If the electrode rod 6 were to protrude beyond the tip of the outer coil 4, an arc spot would be formed on the electrode rod, resulting in an excessive increase in the temperature of the inner coil 5 and the emitter. If the electrode rod 6 is not to protrude beyond the tip of the outer coil 4, the arc spot will be located at the outer coil 5.
Formed at the tip of. Further, when adopting an electrode structure such as the embodiment of the present invention, the thickness of the inner coil is important. That is, the structure is such that the inner coil is inserted between the electrode rod and the outer coil, and a gap is provided between the inner coil and the outer coil so that D/d>1. Therefore, the inner coil employed in the embodiment of the present invention is not a two-layer coil like conventional electrodes, but a single-layer triple coil. By using the triple coil, it was possible to make the amount of emitters attached to the inner coil approximately the same as that of the two-layer coil of the conventional electrode.
上記電源の組立て順序は、まず電極棒と外側コ
イルを第２図に示すごとく、電極棒が外側コイル
の中心を貫通するごとく、治具を用いて外側コイ
ルの小径部を熔接によつて固定し、エミツタを含
有させた内側コイルを先端側から挿入したのち、
外側コイルの開放端を内側に折り曲げて、内側コ
イルが脱落しないように固定する。 The order of assembling the above power supply is to first fix the electrode rod and outer coil by welding the small diameter part of the outer coil using a jig so that the electrode rod penetrates the center of the outer coil as shown in Figure 2. , after inserting the inner coil containing Emitsa from the tip side,
Fold the open end of the outer coil inward and secure the inner coil so that it does not fall off.
本考案の実施例を400Wランプの場合について
説明する。線径600μのタングステン線を密着巻
回した大径部５ターン、小径部３ターンより成る
外側コイルを930μの直径を有する長さ11mmの電
極棒に挿入し、この電極棒が外側コイルの開放端
からも突出しないで中心部を貫通するように治具
を用いて固定する。外側コイルの大径部のマンド
レルは2700μである。これにThO2−Y2O3の混合
エミツタを付着させた内径950μ、外径2300μの
内側コイルを挿入したのち、外側コイルの開放端
を内側に折り曲げて電極を完成する。この場合の
内側コイルの外径ｄに対する外側コイルの内径Ｄ
の比、Ｄ／ｄは1.17となり、外側コイルと内側コ
イルの間には間隙を有して固定されている。 An embodiment of the present invention will be explained in the case of a 400W lamp. An outer coil consisting of 5 turns in the large diameter part and 3 turns in the small diameter part, which is a tightly wound tungsten wire with a wire diameter of 600μ, is inserted into an electrode rod with a length of 11 mm and a diameter of 930μ, and this electrode rod is connected to the open end of the outer coil. Fix it using a jig so that it passes through the center without protruding from the center. The mandrel of the large diameter part of the outer coil is 2700μ. After inserting an inner coil with an inner diameter of 950μ and an outer diameter of 2300μ to which a ThO 2 −Y 2 O 3 mixed emitter is attached, the open end of the outer coil is bent inward to complete the electrode. In this case, the inner diameter D of the outer coil relative to the outer diameter d of the inner coil
The ratio, D/d, is 1.17, and the outer coil and inner coil are fixed with a gap between them.
かかる電極を有し、発光管内には、Na−Tl−
Inのよう化物と始動用ガスとしてNe−Ar混合ガ
ス、および水銀を封入して発光管を完成した。こ
の発光管は通常のごとく、硬質ガラスより成る外
管内にマウントしてランプを完成した。 With such an electrode, Na-Tl- is inside the arc tube.
An arc tube was completed by filling In iodide, a Ne-Ar mixed gas as a starting gas, and mercury. As usual, this arc tube was mounted inside an outer tube made of hard glass to complete the lamp.
本考案の電極を有するランプの内側コイルの温
度を比較するために、ランプを安定状態になるま
で点灯したのち、消灯直後の内側コイルの赤熱状
態を比較すると、明らかに従来電極に比較して温
度が低いことが観察された。また、このランプの
動程特性を調べた結果、4000時間点灯後の光束減
退率は10〜25％であり、従来電極の20〜30％と比
較して改善されることが確認された。さらに、始
動特性に関しても、4000時間点灯後の始動電圧
は、150〜170Vで、従来電極の160〜175Vと比較
して改善されれた特性を示した。 In order to compare the temperature of the inner coil of the lamp with the electrode of the present invention, after lighting the lamp until it reaches a stable state, we compare the glowing state of the inner coil immediately after the lamp is turned off. was observed to be low. Furthermore, as a result of examining the movement characteristics of this lamp, it was confirmed that the luminous flux attenuation rate after 4,000 hours of operation was 10 to 25%, an improvement compared to 20 to 30% for conventional electrodes. Furthermore, regarding the starting characteristics, the starting voltage after 4000 hours of lighting was 150 to 170V, showing improved characteristics compared to 160 to 175V for conventional electrodes.
また他の実施例として、250Wランプにおい
て、線径500μで大径部が2050μのマンドレルを
有した外側コイルを用い、電極棒には800μの直
径で、長さが9.5mmのものを用い、内側コイルは
外径1900μの単層トリプルコイルを用いて実験し
たが、この場合のＤ／ｄは1.08であつた。このラ
ンプの動程特性は、4000時間点灯後の光束減退率
15〜25％、始動電圧は150〜170Vで400Wランプ
と同等の改善された動程特性を示した。 As another example, in a 250W lamp, an outer coil having a mandrel with a wire diameter of 500μ and a large diameter part of 2050μ is used, an electrode rod with a diameter of 800μ and a length of 9.5mm is used, and an inner coil is used. An experiment was conducted using a single-layer triple coil with an outer diameter of 1900 μm, and D/d in this case was 1.08. The movement characteristics of this lamp are the luminous flux attenuation rate after 4000 hours of lighting.
15-25%, and the starting voltage was 150-170V, showing improved stroke characteristics equivalent to a 400W lamp.
以上説明したごとく、本考案は、内部に水銀と
金属ハロゲン化物とを封入した発光管の端部に、
酸化トリウムを含むエミツタを有する内側コイル
と、外側コイルとが設けられた電極棒を備え、外
側コイルの内側に内側コイルが外側コイルと間隙
をするように配置され、電極棒が内側コイルのほ
ぼ全長にわたつて貫通して電極棒に内側コイルが
固定され、かつ電極棒の先端が外側コイルの開放
端から突出しない位置に配されているのでエミツ
タの早期消耗や、この種ランプに広く用いられて
いるThO2の約2300゜Ｋ以上の温度における還元
反応が急速に進行することを防止し、もつて動程
特性の優れたランプを提供することが出来る。 As explained above, the present invention has a structure in which mercury and metal halides are sealed at the end of the arc tube.
An electrode rod is provided with an inner coil having an emitter containing thorium oxide and an outer coil, and the inner coil is arranged inside the outer coil so as to leave a gap between the inner coil and the outer coil. The inner coil is fixed to the electrode rod by penetrating the electrode rod, and the tip of the electrode rod is placed in a position that does not protrude from the open end of the outer coil, which prevents premature wear of the emitter and is widely used in this type of lamp. It is possible to prevent the rapid progress of the reduction reaction of ThO 2 at temperatures above about 2300°K, thereby providing a lamp with excellent dynamic characteristics.
第１図は従来の電極構造を示す図、第２図は本
考案の一実施例の電極構造を示す図である。
４……外側コイル、５……内側コイル、６……
電極棒。
FIG. 1 is a diagram showing a conventional electrode structure, and FIG. 2 is a diagram showing an electrode structure according to an embodiment of the present invention. 4...Outer coil, 5...Inner coil, 6...
Electrode rod.
Claims (1)
光管の端部に、酸化トリウムを含むエミツタを有
する内側コイルと、外側コイルとが設けられた電
極棒を備え、前記外側コイルの内側に前記内側コ
イルが前記外側コイルと間隙を有するように配置
され、前記電極棒が前記内側コイルのほぼ全長に
わたつて貫通して前記電極棒に前記内側コイルが
固定され、かつ前記電極棒の先端が前記外側コイ
ルの開放端から突出しない位置に配されているこ
とを特徴とするメタルハライドランプ。 An electrode rod is provided at the end of an arc tube in which mercury and metal halide are sealed, and an inner coil having an emitter containing thorium oxide and an outer coil are provided, and the inner coil is disposed inside the outer coil. is arranged to have a gap from the outer coil, the electrode rod penetrates the inner coil over almost the entire length and the inner coil is fixed to the electrode rod, and the tip of the electrode rod is connected to the outer coil. A metal halide lamp characterized in that it is arranged in a position that does not protrude from the open end of the lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1978058999U JPS6231973Y2 (en) | 1978-04-28 | 1978-04-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1978058999U JPS6231973Y2 (en) | 1978-04-28 | 1978-04-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54160885U JPS54160885U (en) | 1979-11-10 |
| JPS6231973Y2 true JPS6231973Y2 (en) | 1987-08-15 |
Family
ID=28958313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1978058999U Expired JPS6231973Y2 (en) | 1978-04-28 | 1978-04-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6231973Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5994354A (en) * | 1982-11-19 | 1984-05-31 | Matsushita Electronics Corp | Flash discharge tube |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5113178B2 (en) * | 1971-12-22 | 1976-04-26 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5242058Y2 (en) * | 1974-07-17 | 1977-09-22 | ||
| JPS52109787U (en) * | 1976-02-17 | 1977-08-20 |
-
1978
- 1978-04-28 JP JP1978058999U patent/JPS6231973Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5113178B2 (en) * | 1971-12-22 | 1976-04-26 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54160885U (en) | 1979-11-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4275329A (en) | Electrode with overwind for miniature metal vapor lamp | |
| JP3238909B2 (en) | Metal halide lamp | |
| US5471110A (en) | High pressure discharge lamp having filament electrodes | |
| US3619699A (en) | Discharge lamp having cavity electrodes | |
| JPS6231973Y2 (en) | ||
| JPH0794142A (en) | High-pressure discharge lamp | |
| US4937495A (en) | Electrode structure for single ended high pressure discharge lamp | |
| KR920010056B1 (en) | Metal vapor discharge tube of one-sided sealing type | |
| US7423379B2 (en) | High-pressure gas discharge lamp having tubular electrodes | |
| JPH0418204Y2 (en) | ||
| US4798995A (en) | Metal halide lamp containing halide composition to control arc tube performance | |
| US4621216A (en) | High-pressure discharge lamp with shielded electrode | |
| JPS644305B2 (en) | ||
| EP0080820A2 (en) | Improvements in or relating to discharge lamps | |
| JPS5818863A (en) | High pressure sodium lamp | |
| JPS5859555A (en) | Metal halide lamp | |
| JPH0334833Y2 (en) | ||
| JP2000021350A (en) | Ceramic discharge lamp | |
| JPS6212045A (en) | Hot-cathode discharge lamp | |
| JPH0531268U (en) | Directly heated dispenser cathode | |
| JPH034441A (en) | High-pressure sodium lamp | |
| JPH0612607Y2 (en) | Metal halide lamp | |
| JP2006269081A (en) | Short arc discharge lamp | |
| JPS6321887Y2 (en) | ||
| JPS6336929Y2 (en) |