JPH11312494A - Small high-color rendering metal halide lamp - Google Patents

Small high-color rendering metal halide lamp

Info

Publication number
JPH11312494A
JPH11312494A JP11768498A JP11768498A JPH11312494A JP H11312494 A JPH11312494 A JP H11312494A JP 11768498 A JP11768498 A JP 11768498A JP 11768498 A JP11768498 A JP 11768498A JP H11312494 A JPH11312494 A JP H11312494A
Authority
JP
Japan
Prior art keywords
arc tube
metal halide
tube
halide lamp
color rendering
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
JP11768498A
Other languages
Japanese (ja)
Inventor
Kazutoshi Kurosawa
和俊 黒沢
Satoru Akami
哲 赤見
Yasuo Ban
泰雄 伴
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 JP11768498A priority Critical patent/JPH11312494A/en
Publication of JPH11312494A publication Critical patent/JPH11312494A/en
Pending legal-status Critical Current

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  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a small high-color rendering metal halide lamp that never breaks and scatters an outside tube even in case that an arc tube is burst by the use of a less expensive and simple structure, does not deteriorate luminous flux which the lamp has originally, and is also structurally stable. SOLUTION: This metal halide lamp is composed by storing, in an outside tube 7 which is coated with a fluorine resin film, a transmissive quartz glass arc tube 1 which has an inside volume not more than 8cc and is composed by sealing a pair of electrodes 2 facing each other in the arc tube and filling at least metal halide in addition to mercury and inert gas in the arc tube. In this case, a metal wire 5 is spirally wound from a stay 3 retaining the transmissive quartz glass arc tube 1 by at least one turn in a manner to surround the light emitting part of the arc tube.

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、屋内照明用小型高
演色メタルハライドランプの発光管破裂による外管のガ
ラスの飛散防止に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to prevention of scattering of glass of an outer tube due to rupture of an arc tube of a small high color rendering metal halide lamp for indoor lighting.

【0002】[0002]

【従来の技術】近年、店舗等の屋内照明を行なう際に、
使用される場所や目的に応じて効率の良い照明をするた
めに、小型で高演色なメタルハライドランプが要求され
てきている。例えば、色温度の低い2500〜3000
Kのランプでは落ち着いた雰囲気を作り出すことがで
き、色温度が高い6000〜10000Kのランプでは
屋外の活発な雰囲気を作り出すことができる。
2. Description of the Related Art In recent years, when indoor lighting of a store or the like is performed,
In order to provide efficient illumination according to the place and purpose of use, a small and high color rendering metal halide lamp has been required. For example, 2500 to 3000 having a low color temperature
The K lamp can create a calm atmosphere, and the 6000-10000K lamp having a high color temperature can create an active outdoor atmosphere.

【0003】このような色温度が多彩なメタルハライド
ランプは、発光管内に封入する添加物を変えて、その添
加物特有の発光スペクトルを利用することにより得られ
る。一般的に低色温度域ではSc−Tl−Na(スカン
ジウム−タリウム−ナトリウム)系のメタルハライドラ
ンプが使用され、高色温度域ではDy−Tl(ディスプ
ロシウム−タリウム)系またはDy−Nd(ディスプロ
シウム−ネオジウム)系のメタルハライドランプが使用
されている。
[0003] Such a metal halide lamp having various color temperatures can be obtained by changing an additive to be enclosed in an arc tube and utilizing an emission spectrum peculiar to the additive. Generally, a Sc-Tl-Na (scandium-thallium-sodium) -based metal halide lamp is used in a low color temperature range, and a Dy-Tl (dysprosium-thallium) -based or Dy-Nd (dis Prosium-neodymium) metal halide lamps are used.

【0004】[0004]

【発明が解決しようとする課題】前記の小型で色特性の
優れたメタルハライドランプにおいては、点灯時の発光
管の内圧は200atm以上あり、ランプの点灯、消灯
の繰り返しによって発光管封止部の石英ガラスと電流導
入体であるモリブデンの熱膨張係数の差により、発光管
封止部のリーク現象が発生して、発光管の内圧によって
発光管が破裂し、この破裂した発光管のガラスの破片が
外管に衝突して、外管までも破壊させて飛散させてしま
うという問題があった。
In the above-mentioned metal halide lamp having a small size and excellent color characteristics, the internal pressure of the arc tube at the time of lighting is 200 atm or more. Due to the difference in the thermal expansion coefficient between glass and molybdenum, which is the current introducing body, a leak phenomenon occurs in the arc tube sealing portion, and the arc tube ruptures due to the internal pressure of the arc tube. There is a problem in that the outer tube collides with the outer tube, causing even the outer tube to break and scatter.

【0005】そこで、図2に示すような発光管21を包
囲するように石英ガラス製の発光管保護スリーブ22を
配置し、万が一、発光管21が破裂しても、発光管21
の石英ガラスの破片を発光管保護スリーブ22に衝突さ
せることで、発光管21の石英ガラスの破片を外管23
まで到達させずに破壊できないようにして、外管の飛散
を防止していた。
Therefore, an arc tube protection sleeve 22 made of quartz glass is arranged so as to surround the arc tube 21 as shown in FIG. 2, and even if the arc tube 21 ruptures,
The shards of quartz glass of the arc tube collide with the arc tube protection sleeve 22, whereby the shards of quartz glass of the arc tube 21 are removed from the outer tube 23.
The outer tube was prevented from being scattered without reaching it to prevent the outer tube from scattering.

【0006】しかしながら前記構成では、発光管保護ス
リーブ22が、発光管21からの光を遮光してしまうた
めに、本来ランプが持つ光束が得られないという問題
や、発光管保護スリーブ22および該スリーブの保持材
24により、ランプの部品点数が増えてランプの生産コ
ストが高くなってしまうという問題があった。
However, in the above configuration, the arc tube protection sleeve 22 blocks the light from the arc tube 21, so that the luminous flux inherent in the lamp cannot be obtained. The holding member 24 has a problem that the number of parts of the lamp increases and the production cost of the lamp increases.

【0007】また、発光管21が破裂した場合、発光管
21のガラス破片の運動エネルギーを完全に吸収して、
外管を破壊させないためには、発光管保護スリーブ22
の肉厚を厚くする必要があるが、肉厚が増すとスリーブ
の保持材24との嵌合性が悪くなり、ランプ点灯、消灯
を繰り返しているうちに、発光管保護スリーブ22とス
リーブの保持材24との間にガタが生じてしまうといっ
た問題があった。
When the arc tube 21 ruptures, the kinetic energy of the glass fragments of the arc tube 21 is completely absorbed,
In order not to destroy the outer tube, the arc tube protective sleeve 22
It is necessary to increase the wall thickness, but if the wall thickness increases, the fitting property of the sleeve with the holding member 24 deteriorates. There is a problem that play occurs with the material 24.

【0008】本発明は以上の問題点を解決するために、
安価で容易な構成により万が一、発光管が破裂しても外
管を破壊させ飛散させることなく、かつ本来ランプが持
つ光束を損なわず、構造的にも安定した小型高演色メタ
ルハライドランプを提供することを目的とする。
The present invention has been made in order to solve the above problems.
To provide a small, high-color rendering metal halide lamp that is structurally stable without breaking and scattering the outer tube even if the arc tube ruptures by an inexpensive and easy configuration, and without impairing the luminous flux inherent in the lamp. With the goal.

【0009】[0009]

【課題を解決するための手段】上記問題点を解決するた
め、請求項1記載の発明は、内容積が8CC以下の透光
性の石英ガラス製発光管と、該発光管内に対向する一対
の電極と、前記発光管内に少なくとも水銀、希ガスの他
に金属ハロゲン化物を封入してなる発光管を、フッ素樹
脂膜を施した外管内に収めてなるメタルハライドランプ
において、前記透光性の石英ガラス製発光管を保持する
支柱から前記発光管の発光部を包囲するように、金属線
をスパイラル状に少なくとも1ターン巻回してなること
を特徴とする小型高演色メタルハライドランプである。
In order to solve the above-mentioned problems, the invention according to claim 1 comprises a light-transmitting quartz glass luminous tube having an inner volume of 8 CC or less, and a pair of opposing insides of the luminous tube. In a metal halide lamp in which an electrode and an arc tube enclosing at least mercury and a rare gas in addition to a metal halide in the arc tube are housed in an outer tube provided with a fluororesin film, the translucent quartz glass is used. A small, high color rendering metal halide lamp, wherein a metal wire is spirally wound at least one turn so as to surround a light emitting portion of the arc tube from a column holding the arc tube.

【0010】[0010]

【発明の実施の形態】以下本発明の詳細を図示の実施例
によって説明する。図1は本発明の一実施例を示す小型
高演色メタルハライドランプの概略構成断面図である。
石英ガラス製発光管1内には、ディスプロシウム(D
y)とタリウム(Tl)とセシウム(Cs)と鉛(P
b)のヨウ化物および、水銀と始動用希ガスが封入され
ていて、発光管1の両端には一対の電極2が封止されて
いる。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the illustrated embodiments. FIG. 1 is a schematic sectional view of a small high color rendering metal halide lamp showing one embodiment of the present invention.
In the quartz glass arc tube 1, dysprosium (D
y), thallium (Tl), cesium (Cs), and lead (P
b) iodide, mercury and a rare gas for starting are sealed, and a pair of electrodes 2 are sealed at both ends of the arc tube 1.

【0011】そして、前記石英ガラス製発光管1を保持
する支柱3から前記発光管1の発光部4を包囲するよう
に、金属線5をスパイラル状に3ターン巻回して支柱3
に溶接した後、表面にフッ素樹脂膜6を施した硬質ガラ
ス製の外管7内に組み込む。また、8は保温膜、9はジ
ルコニウムとアルミニウムの混晶体(Zr−Al)ゲッ
タ、10は始動用補助体、11は抵抗、12は口金とな
っている。
Then, the metal wire 5 is spirally wound three turns so as to surround the light emitting portion 4 of the light emitting tube 1 from the column 3 holding the light emitting tube 1 made of quartz glass.
Then, it is incorporated into an outer tube 7 made of hard glass having a surface coated with a fluororesin film 6. Reference numeral 8 denotes a heat insulating film, 9 denotes a mixed crystal (Zr-Al) getter of zirconium and aluminum, 10 denotes an auxiliary body for starting, 11 denotes a resistor, and 12 denotes a base.

【0012】なお、本実施例では発光管1の発光部4を
包囲するように、金属線5をスパイラル状に3ターン巻
いているが、1ターンでも発光管1のガラス破片の運動
エネルギーを吸収することができるため、1ターンでも
外管を破壊させ飛散させることがない小型高演色メタル
ハライドランプが得られることが確認できた。
In this embodiment, the metal wire 5 is wound three turns in a spiral shape so as to surround the light emitting part 4 of the light emitting tube 1, but even one turn absorbs the kinetic energy of the glass fragments of the light emitting tube 1. As a result, it was confirmed that a small, high color rendering metal halide lamp was obtained, which did not break and shatter the outer tube even in one turn.

【0013】その理由としては、外管を破壊させること
ができる力積を持つ発光管のガラス破片は、形状が大き
いものだけであり、外管を破壊させる力積を持つ発光管
のガラス破片は必ず、発光管1の発光部4を包囲する1
ターンのスパイラル状の金属線5に衝突し、発光管のガ
ラス破片の運動エネルギーが減衰して、フッ素樹脂膜付
きの外管を破壊して飛散させるだけの力積がなくなるか
らである。
The reason is that the glass fragments of the arc tube having an impulse capable of destroying the outer tube are only large in shape, and the glass fragments of the arc tube having the impulse which destroys the outer tube are Be sure to surround the light emitting part 4 of the light emitting tube 1
This is because the colliding with the spiral metal wire 5 of the turn causes the kinetic energy of the glass piece of the arc tube to be attenuated, so that there is no impulse sufficient to break and scatter the outer tube with the fluororesin film.

【0014】なお、発光管の発光部に金属線をスパイラ
ル状に包囲していないものは、発光管が破裂すると、発
光管のガラスの破片はフッ素樹脂膜付きの外管を突き破
って、外に飛び出してくることも確認できた。また、本
発明に係る発光管は内容積が8CC以下のランプ電力が
250W以下の小型メタルハライドランプに最適であ
り、前記小型メタルハライドランプは平均演色評価数
(Ra)が80以上の高演色で、色温度が3000K以
上の特性を有している。
In the case where the metal wire is not spirally surrounded by the light emitting portion of the light emitting tube, when the light emitting tube is ruptured, the glass fragments of the light emitting tube break through the outer tube provided with the fluororesin film, and are exposed to the outside. It was confirmed that it jumped out. Further, the arc tube according to the present invention is most suitable for a small metal halide lamp having an internal capacity of 8 CC or less and a lamp power of 250 W or less, and the small metal halide lamp has a high color rendering index (Ra) of 80 or more and has a high color rendering index. The temperature has the characteristic of 3000K or more.

【0015】[0015]

【発明の効果】以上説明したように本発明によれば、安
価で容易な構成により、万が一発光管が破裂しても発光
管のガラス破片の運動エネルギーを確実に減衰させ、外
管を破壊させ飛散させることなく、かつ本来ランプが持
つ光束を損なわず、構造的にも安定した小型高演色メタ
ルハライドランプが得られる。
As described above, according to the present invention, the kinetic energy of the glass fragments of the arc tube is reliably attenuated even if the arc tube ruptures, and the outer tube is destroyed by the inexpensive and easy structure. A compact, high color rendering metal halide lamp that is structurally stable without scattering and without impairing the luminous flux of the lamp is obtained.

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

【図1】本発明の一実施例を示す小型高演色メタルハラ
イドランプの概略構成断面図である。
FIG. 1 is a schematic sectional view of a compact high color rendering metal halide lamp showing one embodiment of the present invention.

【図2】発光管破裂による外管のガラスの飛散防止した
従来例の小型高演色メタルハライドランプの概略構成断
面図である。
FIG. 2 is a schematic cross-sectional view of a conventional small high color rendering metal halide lamp in which glass of an outer tube is prevented from scattering due to rupture of an arc tube.

【符号の説明】[Explanation of symbols]

1、21 発光管 2 電極 3 支柱 4 発光部 5 金属線 6 フッ素樹脂膜 7、23 外管 8 保温膜 9 ゲッタ 10 始動用補助体 11 抵抗 12 口金 22 発光管保護スリーブ 24 発光管保護スリーブの保持材 DESCRIPTION OF SYMBOLS 1, 21 Arc tube 2 Electrode 3 Prop 4 Light emitting part 5 Metal wire 6 Fluororesin film 7, 23 Outer tube 8 Heat insulation film 9 Getter 10 Starting auxiliary body 11 Resistor 12 Base 22 Arc tube protection sleeve 24 Holding of arc tube protection sleeve Lumber

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】内容積が8CC以下の透光性の石英ガラス
製発光管と、該発光管内に対向する一対の電極と、前記
発光管内に少なくとも水銀、希ガスの他に金属ハロゲン
化物を封入して両端部を圧潰封止してなる発光管を、フ
ッ素樹脂膜を施した外管内に収めてなるメタルハライド
ランプにおいて、前記透光性の石英ガラス製発光管を保
持する支柱から前記発光管の発光部を包囲するように、
金属線をスパイラル状に少なくとも1ターン巻回してな
ることを特徴とする小型高演色メタルハライドランプ。
1. A light-transmitting quartz glass arc tube having an internal volume of 8 CC or less, a pair of electrodes facing the inside of the arc tube, and a metal halide enclosed in the arc tube in addition to at least mercury and a rare gas. Then, in a metal halide lamp in which an arc tube formed by crushing and sealing both ends is placed in an outer tube provided with a fluororesin film, a strut holding the translucent quartz glass arc tube is attached to the arc tube from the column holding the arc tube. So as to surround the light emitting part,
A small, high color rendering metal halide lamp, wherein a metal wire is spirally wound at least one turn.
JP11768498A 1998-04-28 1998-04-28 Small high-color rendering metal halide lamp Pending JPH11312494A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11768498A JPH11312494A (en) 1998-04-28 1998-04-28 Small high-color rendering metal halide lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11768498A JPH11312494A (en) 1998-04-28 1998-04-28 Small high-color rendering metal halide lamp

Publications (1)

Publication Number Publication Date
JPH11312494A true JPH11312494A (en) 1999-11-09

Family

ID=14717741

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11768498A Pending JPH11312494A (en) 1998-04-28 1998-04-28 Small high-color rendering metal halide lamp

Country Status (1)

Country Link
JP (1) JPH11312494A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004001793A1 (en) * 2002-06-24 2003-12-31 Koninklijke Philips Electronics N.V. Coil antenna/protection for ceramic metal halide lamps
JP2006228584A (en) * 2005-02-18 2006-08-31 Iwasaki Electric Co Ltd High pressure discharge lamp

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004001793A1 (en) * 2002-06-24 2003-12-31 Koninklijke Philips Electronics N.V. Coil antenna/protection for ceramic metal halide lamps
JP2005531116A (en) * 2002-06-24 2005-10-13 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Coil antenna / protection for ceramic metal halide lamps
JP2006228584A (en) * 2005-02-18 2006-08-31 Iwasaki Electric Co Ltd High pressure discharge lamp

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