JPH07142033A - Metal halide lamp - Google Patents
Metal halide lampInfo
- Publication number
- JPH07142033A JPH07142033A JP29175793A JP29175793A JPH07142033A JP H07142033 A JPH07142033 A JP H07142033A JP 29175793 A JP29175793 A JP 29175793A JP 29175793 A JP29175793 A JP 29175793A JP H07142033 A JPH07142033 A JP H07142033A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- metal halide
- lamp
- arc tube
- translucent
- 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
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は内部に一対の電極を有
し、かつ水銀、始動用希ガスとともに金属ハロゲン化物
を封入した発光管を包囲する透光性筒を有し、さらに発
光管および透光性筒を内蔵する外管を有するメタルハラ
イドランプに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a pair of electrodes inside and a light-transmissive tube which surrounds an arc tube enclosing a metal halide together with mercury and a rare gas for starting. The present invention relates to a metal halide lamp having an outer tube containing a translucent tube.
【０００２】[0002]
【従来の技術】メタルハライドランプは、従来、屋外照
明分野で使用されてきたが、近年になって店舗等の屋内
照明分野で、コンパクトな直管形状のランプが使用され
る機会が増えてきている。ところで、メタルハライドラ
ンプは、希にではあるが寿命末期に発光管が破損する危
険性がある。これは、発光管材料の石英が、封入ハロゲ
ン化金属と反応してその強度が低下するためである。ま
た、この発光管破損時に、その破片により外管が破損し
て飛散することがある。一般のメタルハライドランプで
は、このような発光管の破片による外管の破損を防止す
るために、外管の外表面にフッ素樹脂被膜を塗布する構
造を採用している。2. Description of the Related Art Metal halide lamps have hitherto been used in the field of outdoor lighting, but in recent years, in the field of indoor lighting of stores and the like, opportunities for using compact, straight tube-shaped lamps have increased. . By the way, the metal halide lamp has a risk of the arc tube being damaged at the end of its life, although it is rare. This is because the quartz of the arc tube material reacts with the enclosed metal halide to reduce its strength. Further, when the arc tube is broken, the outer tube may be broken and scattered by the fragments. A general metal halide lamp employs a structure in which a fluororesin coating is applied to the outer surface of the outer tube in order to prevent the outer tube from being damaged by such fragments of the arc tube.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、コンパ
クト形状のランプでは、外管温度がフッ素樹脂被膜の許
容温度上限を超えるために、このようなフッ素樹脂被膜
を使用することができない。このため、従来は器具に強
化ガラスからなる前面ガラスを設けて外管破片の飛散を
防止する構造を採用している。しかし、器具が制限され
るため、ランプ自体に外管破損防止機構をもったランプ
が要望されている。However, in a lamp having a compact shape, such a fluororesin coating cannot be used because the outer tube temperature exceeds the upper limit of the permissible temperature of the fluororesin coating. For this reason, conventionally, a structure has been adopted in which a front glass made of tempered glass is provided on the device to prevent scattering of outer tube fragments. However, since the equipment is limited, a lamp having an outer tube damage preventing mechanism in the lamp itself is desired.
【０００４】本発明は、ランプ自体に外管破損防止機構
を有する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。It is an object of the present invention to provide a metal halide lamp which has an outer tube damage preventing mechanism on the lamp itself.
【０００５】[0005]
【課題を解決するための手段】本発明のメタルハライド
ランプは、内部に一対の電極を有し、かつ水銀、始動用
希ガスとともに金属ハロゲン化物を封入した発光管と、
前記発光管を包囲する透光性筒と、前記発光管および前
記透光性筒を内蔵する外管とを備え、前記透光性筒は二
重構造であり、かつ両透光性筒の肉厚の合計が３．３ｍ
ｍ〜５．０ｍｍである構成を有する。また、本発明のメ
タルハライドランプは、内部に一対の電極を有し、かつ
水銀、始動用希ガスとともに金属ハロゲン化物を封入し
た発光管と、前記発光管を包囲する透光性筒と、前記発
光管および前記透光性筒を内蔵する外管とを備え、前記
透光性筒は一重構造であり、かつ前記透光性筒の肉厚が
４．０ｍｍ〜５．０ｍｍである構成を有する。A metal halide lamp according to the present invention comprises an arc tube having a pair of electrodes therein, and a metal halide enclosed together with mercury and a rare gas for starting.
The translucent tube surrounding the arc tube and the outer tube containing the arc tube and the translucent tube are provided. The translucent tube has a double structure and the meat of both translucent tubes. The total thickness is 3.3m
It has a configuration of m to 5.0 mm. Further, the metal halide lamp of the present invention has an arc tube having a pair of electrodes inside, and a metal halide enclosed together with mercury and a rare gas for starting, a translucent tube surrounding the arc tube, and the light emission. The transparent tube includes a tube and an outer tube containing the transparent tube, the transparent tube has a single-layer structure, and the transparent tube has a thickness of 4.0 mm to 5.0 mm.
【０００６】[0006]
【作用】かかる構成により、寿命中に発光管が破裂し、
発光管の破片が飛散しても透光性筒によってその飛散の
衝撃を吸収することができる。[Operation] With this structure, the arc tube bursts during its life,
Even if the fragments of the arc tube scatter, the impact of the scattering can be absorbed by the translucent cylinder.
【０００７】[0007]
【実施例】本発明の一実施例について図面を用いて説明
する。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings.
【０００８】図１に示す本発明の一実施例である２５０
Ｗタイプのメタルハライドランプは、内径１９ｍｍの石
英ガラス製の発光管１を備えており、その内部には、一
対の電極（図示せず）を有するとともに、始動用希ガス
として１００００パスカルのアルゴンと水銀２５ｍｇの
水銀のほかに、ＴｌＩ１．７ｍｇ，ＤｙＩ3６．２ｍｇ
およびＣｓＩ２．１ｍｇの金属ハロゲン化物が封入され
ている。発光管１の周りには、ランプ軸に中心があり、
同心円状となる石英製内側透光性円筒２と石英製外側透
光性円筒３とからなる二重構造の透光性筒１０が、直径
４３ｍｍの金属プレート４，５に設けられた舌片６，７
により固定されている。外管８は、発光管１および透光
性筒１０を内蔵している。なお、９は口金である。One embodiment of the present invention shown in FIG. 1, 250
The W-type metal halide lamp includes an arc tube 1 made of quartz glass and having an inner diameter of 19 mm, and has a pair of electrodes (not shown) inside thereof and 10000 Pascals of argon and mercury as starting rare gases. In addition to 25 mg mercury, TlI 1.7 mg, DyI 3 6.2 mg
And CsI 2.1 mg of metal halide is encapsulated. The center of the lamp axis is around the arc tube 1,
A translucent cylinder 10 having a double structure composed of a concentric quartz inner translucent cylinder 2 and a quartz outer translucent cylinder 3 is provided with a tongue piece 6 provided on metal plates 4 and 5 having a diameter of 43 mm. , 7
It is fixed by. The outer tube 8 contains the light emitting tube 1 and the transparent tube 10. In addition, 9 is a base.
【０００９】また、図２に示す本発明の他の実施例であ
る２５０Ｗタイプのメタルハライドランプは、上記実施
例とは異なり、透光性筒１１が一重構造を有している。In addition, in the metal halide lamp of the 250 W type which is another embodiment of the present invention shown in FIG. 2, the translucent tube 11 has a single structure unlike the above embodiment.
【００１０】次に、ランプの外管破損防止効果を観察す
るために、透光性筒の一重および二重構造、および透光
性筒の肉厚の和を種々変化させたランプを製作し、ラン
プ安定点灯時に安定器を短絡させ、大電流を加えて発光
管を強制破損させた。そして、その全光束と発光管強制
破損時の外管破損率を調べた。その結果を表１に示す。Next, in order to observe the effect of preventing damage to the outer tube of the lamp, a lamp having various single and double structures of the transparent tube and the total thickness of the transparent tube was manufactured, During stable lighting of the lamp, the ballast was short-circuited and a large current was applied to forcibly damage the arc tube. Then, the total luminous flux and the outer tube damage rate when the arc tube was forcibly damaged were examined. The results are shown in Table 1.
【００１１】[0011]
【表１】 [Table 1]
【００１２】表１の結果から明らかなように、透光性筒
が二重構造の場合、肉厚の和が３．００ｍｍ以下では外
管破損が発生し、肉厚の和が３．３０ｍｍ以上で外管破
損を防止できることがわかる。また、透光性筒が一重構
造の場合には、肉厚が３．３０ｍｍでも外管破損が発生
し、肉厚４．００ｍｍ以上で外管破損を防止できること
がわかる。一方、透光性筒が二重構造および一重構造の
場合、透光性筒の肉厚の厚さの和が５．００ｍｍを越え
ると、ランプの全光束が従来の２５０Ｗランプの全光束
である１９０００ｌｍを下回ってしまう。これは、透光
性筒の肉厚により可視光が吸収されるためと考えられ
る。As is clear from the results shown in Table 1, when the translucent cylinder has a double structure, the outer tube is damaged when the total thickness is 3.00 mm or less, and the total thickness is 3.30 mm or more. It can be seen that can prevent the outer tube from being damaged. It is also understood that when the translucent cylinder has a single structure, outer tube damage occurs even when the wall thickness is 3.30 mm, and it is possible to prevent outer tube damage when the wall thickness is 4.00 mm or more. On the other hand, in the case where the transparent tube has a double structure or a single structure, when the sum of the thicknesses of the transparent tube exceeds 5.00 mm, the total luminous flux of the lamp is the total luminous flux of the conventional 250 W lamp. It falls below 19000 lm. It is considered that this is because visible light is absorbed due to the thickness of the translucent cylinder.
【００１３】以上の結果より、透光性筒が一重構造のメ
タルハライドランプの場合、十分な全光束を持ち、かつ
外管の破損を防止するには、肉厚を４．０ｍｍ〜５．０
ｍｍの範囲にする必要がある。また、透光性筒が二重構
造のメタルハライドランプの場合には、上記と同様の目
的を達成するには、肉厚の和を３．３ｍｍ〜５．０ｍｍ
の範囲にする必要がある。From the above results, in the case of a metal halide lamp having a single-layer translucent tube, in order to have a sufficient total luminous flux and prevent the outer tube from being damaged, the wall thickness is 4.0 mm to 5.0 mm.
It must be in the mm range. Further, in the case of a metal halide lamp having a translucent tube having a double structure, in order to achieve the same purpose as described above, the sum of the wall thicknesses is 3.3 mm to 5.0 mm.
Must be in the range.
【００１４】[0014]
【発明の効果】以上説明したように、本発明のメタルハ
ライドランプは、ランプの全光束の低下を抑制し、かつ
寿命中の発光管の破裂にともなう外管の破損を防止する
ことができる。As described above, the metal halide lamp of the present invention can suppress the decrease of the total luminous flux of the lamp and prevent the outer tube from being damaged due to the rupture of the arc tube during its life.
【図１】本発明の一実施例であるメタルハライドランプ
の一部切欠正面図FIG. 1 is a partially cutaway front view of a metal halide lamp according to an embodiment of the present invention.
【図２】本発明の他の実施例であるメタルハライドラン
プの一部切欠正面図FIG. 2 is a partially cutaway front view of a metal halide lamp which is another embodiment of the present invention.
１ 発光管 ２ 内側透光性円筒 ３ 外側透光性円筒 ８ 外管 1 luminous tube 2 inner transparent cylinder 3 outer transparent cylinder 8 outer tube
Claims (2)
動用希ガスとともに金属ハロゲン化物を封入した発光管
と、前記発光管を包囲する透光性筒と、前記発光管およ
び前記透光性筒を内蔵する外管とを備え、前記透光性筒
は二重構造であり、かつ両透光性筒の肉厚の合計が３．
３ｍｍ〜５．０ｍｍであることを特徴とするメタルハラ
イドランプ。1. An arc tube having a pair of electrodes inside and containing a metal halide together with mercury and a rare gas for starting, a translucent cylinder surrounding the arc tube, the arc tube and the translucent tube. 2. An outer tube containing a light-transmitting tube, wherein the light-transmitting tube has a double structure, and the total thickness of both light-transmitting tubes is 3.
A metal halide lamp having a length of 3 mm to 5.0 mm.
動用希ガスとともに金属ハロゲン化物を封入した発光管
と、前記発光管を包囲する透光性筒と、前記発光管およ
び前記透光性筒を内蔵する外管とを備え、前記透光性筒
は一重構造であり、かつ前記透光性筒の肉厚が４．０ｍ
ｍ〜５．０ｍｍであることを特徴とするメタルハライド
ランプ。2. An arc tube having a pair of electrodes inside and containing a metal halide together with mercury and a rare gas for starting, a translucent cylinder surrounding the arc tube, the arc tube and the translucent tube. An outer tube containing a light-transmitting tube, wherein the light-transmitting tube has a single-layer structure, and the thickness of the light-transmitting tube is 4.0 m.
A metal halide lamp having a length of m to 5.0 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29175793A JPH07142033A (en) | 1993-11-22 | 1993-11-22 | Metal halide lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29175793A JPH07142033A (en) | 1993-11-22 | 1993-11-22 | Metal halide lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07142033A true JPH07142033A (en) | 1995-06-02 |
Family
ID=17773031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29175793A Pending JPH07142033A (en) | 1993-11-22 | 1993-11-22 | Metal halide lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07142033A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012028096A (en) * | 2010-07-21 | 2012-02-09 | Iwasaki Electric Co Ltd | Ceramic metal halide lamp with outer bulb protection structure |
| WO2012102230A1 (en) * | 2011-01-25 | 2012-08-02 | 株式会社Ｇｓユアサ | Discharge lamp |
-
1993
- 1993-11-22 JP JP29175793A patent/JPH07142033A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012028096A (en) * | 2010-07-21 | 2012-02-09 | Iwasaki Electric Co Ltd | Ceramic metal halide lamp with outer bulb protection structure |
| WO2012102230A1 (en) * | 2011-01-25 | 2012-08-02 | 株式会社Ｇｓユアサ | Discharge lamp |
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