JPH0757699A - Metal halide lamp - Google Patents

Metal halide lamp

Info

Publication number
JPH0757699A
JPH0757699A JP19627893A JP19627893A JPH0757699A JP H0757699 A JPH0757699 A JP H0757699A JP 19627893 A JP19627893 A JP 19627893A JP 19627893 A JP19627893 A JP 19627893A JP H0757699 A JPH0757699 A JP H0757699A
Authority
JP
Japan
Prior art keywords
tube
metal halide
arc tube
light emitting
halide 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.)
Granted
Application number
JP19627893A
Other languages
Japanese (ja)
Other versions
JP3110213B2 (en
Inventor
Fuminori Nakayama
史紀 中山
Kuniki Fukuda
国樹 福田
Mikihiro Fujiwara
幹大 藤原
Takashi Yamamoto
高詩 山本
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electronics Corp
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 Matsushita Electronics Corp filed Critical Matsushita Electronics Corp
Priority to JP05196278A priority Critical patent/JP3110213B2/en
Publication of JPH0757699A publication Critical patent/JPH0757699A/en
Application granted granted Critical
Publication of JP3110213B2 publication Critical patent/JP3110213B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PURPOSE:To provide a metal halide lamp by which a satisfactory color charac teristic can be realized and which is resistant to impact. CONSTITUTION:Metal halide and shock absorbing gas are sealed inside of a light emitting tube 1. Nitrogen gas is sealed by 50000Pa inside of an outer tube 2 enclosing the light emitting tube 1. A light transmissive protective cylinder 4 to protect the outer tube 2 is arranged between the light emitting tube 1 and the outer tube 2. A heat reserving plate 13 is arranged between the light emitting tube 1 and the protective cylinder 4 so as to connect these light emitting tube 1 and protective cylinder 4 to each other, and the heat reserving plate 13 reserves heat of a sealing part 1a of the light emitting tube by restraining convection of gas around the light emitting tube 1. The sealing part 1a of the light emitting tube 1 passes penetratingly through the center of the heat reserving plate 13, and a leg part 12 around the heat reserving plate 13 presses the protective cylinder 4 outwards.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明はメタルハライドランプに
関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal halide lamp.

【0002】[0002]

【従来の技術】まず、図7に基づき従来のハライドラン
プの構造について説明する。
2. Description of the Related Art First, the structure of a conventional halide lamp will be described with reference to FIG.

【0003】従来のメタルハライドランプは、両端部に
封止部1aを有し、かつ内部に一対の電極を有する発光
管1が外管2に内蔵された構造を有しており、発光管1
の内部にはハロゲン化金属および緩衝ガスが封入され、
発光管1と外管2との間には窒素ガスが50000パス
カル封入されている。発光管1の封止部1aの外面には
ZrO2 等からなる熱反射膜3が形成されており、ま
た、発光管1と外管2との間には外管1を保護する透光
性の保護筒4が設けられている。なお、図7において、
5はステム、6はゲッター、7は口金、8は電力供給
線、9はステム線、10は保護筒4の両端開口部に設け
られた金属板を示す。
The conventional metal halide lamp has a structure in which an outer tube 2 has a structure in which an arc tube 1 having a sealing portion 1a at both ends and having a pair of electrodes therein is built in.
Metal halide and buffer gas are enclosed inside the
Nitrogen gas is filled between the arc tube 1 and the outer tube 2 at 50,000 pascals. A heat-reflecting film 3 made of ZrO 2 or the like is formed on the outer surface of the sealing portion 1a of the arc tube 1, and a translucent material for protecting the outer tube 1 is provided between the arc tube 1 and the outer tube 2. The protective cylinder 4 is provided. In addition, in FIG.
Reference numeral 5 is a stem, 6 is a getter, 7 is a base, 8 is a power supply line, 9 is a stem line, and 10 is a metal plate provided at both end openings of the protective cylinder 4.

【0004】メタルハライドランプにおいては、高演色
高効率を実現するためには、ハロゲン化金属の蒸気圧を
上げることが必要である。そのためには、発光管1の最
冷点温度を上げることが必要であり、従来から、発光管
1の管壁負荷を上げたり、発光管1の封止部1aに熱反
射膜3を設けたりするなどの対策が講じられてきた。
In the metal halide lamp, it is necessary to increase the vapor pressure of the metal halide in order to achieve high color rendering efficiency. For that purpose, it is necessary to raise the coldest spot temperature of the arc tube 1, and conventionally, the load on the tube wall of the arc tube 1 is increased or the heat reflection film 3 is provided on the sealing portion 1a of the arc tube 1. Measures such as doing have been taken.

【0005】[0005]

【発明が解決しようとする課題】しかしながら、消費電
力の小さいメタルハライドランプの場合、発光管の封止
部からの熱損失の影響が大きい。特に垂直点灯の場合に
は発光管の封止部が最冷温度部分になり、ハロゲン化金
属の十分な蒸気圧を得ることが困難である。
However, in the case of a metal halide lamp with low power consumption, the effect of heat loss from the sealed portion of the arc tube is large. Particularly in the case of vertical lighting, the sealing portion of the arc tube becomes the coldest temperature portion, and it is difficult to obtain a sufficient vapor pressure of the metal halide.

【0006】特に希土類系のハロゲン化金属を封入した
メタルハライドランプにおいては、ハロゲン化金属の蒸
気圧が低いので、発光管の管壁負荷を上げたり、発光管
の封止部の面積を小さくしたり、封止部の保温膜の面積
を広くしたりする等の対策を講じても、満足できる色特
性および効率を実現することは困難である。例えばDy
3 −HoI3 −TmI3 −TlI−NaIの組成をも
つハロゲン化金属が封入された消費電力100Wの垂直
点灯型メタルハライドランプの場合には、ハロゲン化金
属が存在する発光管封止部近傍つまり最冷温度部分の温
度が十分に上がらないので、色特性については色温度が
目標4300Kに対して4700Kと高く、Raは目標
85に対して81と低い。
Particularly in a metal halide lamp in which a rare earth metal halide is sealed, the vapor pressure of the metal halide is low, so that the wall load of the arc tube is increased and the area of the sealed portion of the arc tube is reduced. Even if measures such as increasing the area of the heat insulating film of the sealing portion are taken, it is difficult to achieve satisfactory color characteristics and efficiency. For example Dy
In the case of a vertical lighting type metal halide lamp with a power consumption of 100 W in which a metal halide having a composition of I 3 -HoI 3 -TmI 3 -TlI-NaI is enclosed, the vicinity of the arc tube sealing portion where the metal halide is present, that is, Since the temperature of the coldest temperature part does not rise sufficiently, the color temperature is as high as 4700K against the target 4300K, and Ra is as low as 81 against the target 85.

【0007】また、全方向点灯型のランプにおいても垂
直点灯型のランプの場合と同様の現象が生じ、垂直点灯
時には水平点灯時に比べて、ランプの効率および色特性
が著しく低下し、好ましい全方向点灯特性が得られない
という問題がある。全方向点灯型ランプの場合、点灯方
向による特性の変化が大きいと、照明器具へのランプの
取付方向により色特性が変化し、実際の照明に支障をき
たす場合がある。
Further, in the omnidirectional lighting type lamp, the same phenomenon as in the vertical lighting type lamp occurs, and the efficiency and color characteristics of the lamp are remarkably deteriorated in the vertical lighting type as compared with the horizontal lighting type. There is a problem that lighting characteristics cannot be obtained. In the case of an omnidirectional lighting type lamp, if there is a large change in the characteristics depending on the lighting direction, the color characteristics may change depending on the mounting direction of the lamp to the lighting fixture, which may interfere with actual lighting.

【0008】発光管からの熱損失は外管内に封入された
ガスの対流によるものと熱放射によるものとに大別でき
るが、このうち対流による熱損失は発光管の下部におい
て著しい。このため、表面積の大きい発光管封止部を下
側にして点灯した場合(垂直点灯の場合)、発光管封止
部からの熱放射に加えて対流による熱損失が大きく、発
光管封止部の最冷温度部分の温度が低下するので、ハロ
ゲン化金属の蒸気圧の上昇が妨げられる結果となり、ラ
ンプの効率および色特性は低下してしまう。
The heat loss from the arc tube can be roughly classified into the convection of the gas enclosed in the outer tube and the heat radiation. Among them, the heat loss due to the convection is remarkable in the lower part of the arc tube. For this reason, when lighting is performed with the large-surface-area arc tube sealing part facing downward (in the case of vertical lighting), heat loss due to convection is large in addition to heat radiation from the arc tube sealing part, and the arc tube sealing part Since the temperature of the coldest temperature part of the lamp is lowered, the vapor pressure of the metal halide is prevented from increasing and the efficiency and color characteristics of the lamp are lowered.

【0009】全方向点灯型ランプの場合でも、垂直点灯
時に水平点灯時と同様にハロゲン化金属の十分な蒸気圧
を確保するのは困難であるため、ランプ特性は点灯方向
によって大きく変動するという問題がある。
Even in the case of an omnidirectional lighting type lamp, it is difficult to secure a sufficient vapor pressure of the metal halide when vertically lighting as in the case of horizontal lighting, so that the lamp characteristics greatly vary depending on the lighting direction. There is.

【0010】また、メタルハライドランプは、従来か
ら、ライフ末期に発光管が破損する危険性があるため、
発光管が破損した際の外管の破損を防止するために、上
述したように、発光管を透光性の保護筒で包囲する方法
がしばしば採用されてきた。
Further, since the metal halide lamp has a risk that the arc tube will be damaged at the end of its life,
In order to prevent the outer tube from being damaged when the arc tube is damaged, a method of surrounding the arc tube with a translucent protective tube has often been adopted as described above.

【0011】ところが、発光管を保護筒で包囲したメタ
ルハライドランプは衝撃に弱く、ランプに大きな衝撃が
加わると、発光管と保護筒又は保護筒と外管とがそれぞ
れ衝突し、発光管や保護筒が破損するという問題があ
る。
However, the metal halide lamp in which the arc tube is surrounded by the protective tube is vulnerable to impact, and when a large impact is applied to the lamp, the arc tube and the protective tube or the protective tube and the outer tube collide with each other to cause the arc tube and the protective tube. Has the problem of being damaged.

【0012】本発明は、前記の各問題点を一挙に解決
し、満足できる色特性が実現できるとともに衝撃に強い
メタルハライドランプを提供することを目的とする。
An object of the present invention is to provide a metal halide lamp which can solve the above-mentioned problems all at once and can realize satisfactory color characteristics and is resistant to impact.

【0013】[0013]

【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、両端に封止部が設けられ、かつ内部に一対の
電極が設けられ、さらにハロゲン化金属および緩衝ガス
が封入された発光管と、前記発光管を内蔵した外管と、
前記外管内で前記発光管を囲繞するように設けられた透
光性の保護筒とを備え、前記発光管と前記保護筒との間
に前記発光管と保護筒とを連結するように設けられ、前
記発光管周辺のガスの対流を抑制することにより前記封
止部を保温する保温板を備えている。
A metal halide lamp according to the present invention comprises a light emitting tube having sealing parts provided at both ends, a pair of electrodes provided inside, and a metal halide and a buffer gas sealed therein. An outer tube containing the arc tube,
A translucent protection cylinder provided so as to surround the arc tube in the outer tube, and provided so as to connect the arc tube and the protection tube between the arc tube and the protection tube. A heat insulating plate that keeps the sealed portion warm by suppressing convection of gas around the arc tube is provided.

【0014】[0014]

【作用】請求項1の構成により、発光管周辺のガスの対
流を抑制する保温板が設けられているため、発光管周辺
ひいては発光管封止部周辺のガスの対流が抑制されるの
で発光管封止部が保温される。この結果、発光管封止部
からの熱損失が低減するので、垂直点灯時におけるハロ
ゲン化金属の十分な蒸気圧を得ることが可能になる。
According to the structure of claim 1, since the heat insulating plate for suppressing the convection of the gas around the arc tube is provided, the convection of the gas around the arc tube, and hence around the arc tube sealing portion is suppressed, so that the arc tube. The sealing part is kept warm. As a result, heat loss from the arc tube sealing portion is reduced, so that it is possible to obtain a sufficient vapor pressure of the metal halide during vertical lighting.

【0015】また、保温板が発光管と保護筒とを連結し
ているため、寿命末期に発光管が破損し、これに伴って
保護筒が破損したときに外管が破損する事態が防止され
るとともに、保温板は発光管を保護筒の中央に保持する
機能および保護筒を外管の中央に保持する機能を有して
おり、メタルハライドランプに衝撃が加わったときの発
光管と保護筒との衝突および保護筒と外管との衝突を防
止する。
Further, since the heat insulating plate connects the arc tube and the protective tube, it is possible to prevent the arc tube from being damaged at the end of its life and the outer tube being damaged when the protective tube is damaged. In addition, the heat insulating plate has the function of holding the arc tube in the center of the protection tube and the function of holding the protection tube in the center of the outer tube, so that the arc tube and the protection tube when the metal halide lamp is impacted And the collision between the protective tube and the outer tube.

【0016】請求項2の構成により、保温板は発光管の
中央部から放射された光を発光管封止部近傍へ反射する
ような形状に形成されているため、発光管封止部の温度
がさらに上昇する。
According to the second aspect of the present invention, since the heat insulating plate is formed in a shape that reflects the light emitted from the central portion of the arc tube to the vicinity of the arc tube sealing portion, the temperature of the arc tube sealing portion is reduced. Will rise further.

【0017】[0017]

【実施例】以下、本発明の実施例を図面に基づき説明す
る。
Embodiments of the present invention will be described below with reference to the drawings.

【0018】図1は本発明の第1実施例における100
Wメタルハライドランプを示す。図1に示すように、発
光管1は、内部に一対の電極を有し、両端部に封止部1
aを有しており、外管2内に設けられている。発光管1
は内径10mmの石英管からなり、その内部には緩衝ガ
スとしてのアルゴンが10000パスカル、ハロゲン化
金属としてのDyI3 −HoI3 −TmI3 −TlI−
NaIが2mg、Hgが12mgそれぞれ封入されてい
る。発光管1の封止部1aの外面にはZrO2等からな
る熱反射膜3が形成されている。また、外管2内には、
発光管1を囲繞するように設けられ、寿命末期に発光管
1が破損した際の外管2の破損を防止する透光性の保護
筒4が設けられている。発光管1の両端の封止部1aと
保護筒4との間には、図2および図3に示すような、N
iメッキされたFe板よりなる円形状の保温板11が設
けられている。保温板11の中央には矩形状の貫通孔1
1aが設けられており、貫通孔11aを発光管1の封止
部1aが貫通している。また保温板11の周囲には屈折
した帯状板からなる脚部12が略等間隔に設けられ、各
脚部12は保護筒4の内周面を押圧している。保温板1
1の貫通孔11aを発光管1の封止部1aが貫通すると
ともに保温板11の各脚部12が保護筒4の内周面を押
圧していることによって、保温板11が発光管1と保護
筒4とを連結しているとともに発光管1が保護筒4の中
央に位置しかつ保護筒4が外管2の中央に位置してい
る。なお、図1において、5はステム、6はゲッター、
7は口金、8は電力供給線、9はステム線、10は保護
筒4の両端に設けられた金属板を示す。
FIG. 1 shows a first embodiment 100 of the present invention.
A W metal halide lamp is shown. As shown in FIG. 1, the arc tube 1 has a pair of electrodes inside and a sealing part 1 at both ends.
a and is provided in the outer tube 2. Arc tube 1
The inner diameter of 10mm, quartz tube, argon 10000 Pascal as a buffer gas therein, -TmI DyI 3 -HoI 3 as metal halide 3 -TlI-
2 mg of NaI and 12 mg of Hg are enclosed. A heat reflection film 3 made of ZrO 2 or the like is formed on the outer surface of the sealing portion 1a of the arc tube 1. In addition, in the outer tube 2,
A light-transmitting protective cylinder 4 is provided so as to surround the arc tube 1 and prevent damage to the outer tube 2 when the arc tube 1 is damaged at the end of its life. Between the sealing portion 1a at both ends of the arc tube 1 and the protective tube 4, as shown in FIGS.
A circular heat insulating plate 11 made of an i-plated Fe plate is provided. A rectangular through hole 1 is provided in the center of the heat insulating plate 11.
1a is provided, and the sealing portion 1a of the arc tube 1 penetrates the through hole 11a. Further, legs 12 made of a bent strip plate are provided around the heat insulating plate 11 at substantially equal intervals, and each leg 12 presses the inner peripheral surface of the protective cylinder 4. Insulation plate 1
Since the sealing portion 1a of the arc tube 1 penetrates the through hole 11a of No. 1 and each leg 12 of the heat insulating plate 11 presses the inner peripheral surface of the protective cylinder 4, the heat insulating plate 11 is connected to the arc tube 1. The arc tube 1 is located in the center of the protection tube 4, and the protection tube 4 is located in the center of the outer tube 2 while being connected to the protection tube 4. In FIG. 1, 5 is a stem, 6 is a getter,
Reference numeral 7 is a base, 8 is a power supply line, 9 is a stem wire, and 10 is a metal plate provided at both ends of the protective cylinder 4.

【0019】図3および図4は本発明の第2実施例にお
けるメタルハライドランプの保温板13を示している。
保温板13は、中央の円板状の底部13aとこの底部1
3aの外周から外方へ斜めに延びる円錐台状の反射部1
3bとからなり、反射部13bは発光管1の中央部から
出射された光を発光管1の各封止部1aひいては発光管
の封止部1aの近傍に反射するような形状に形成されて
いる。
3 and 4 show a heat retaining plate 13 of a metal halide lamp according to the second embodiment of the present invention.
The heat insulating plate 13 includes a disk-shaped bottom portion 13a at the center and the bottom portion 1a.
A truncated cone-shaped reflector 1 extending obliquely outward from the outer periphery of 3a
3b, and the reflecting portion 13b is formed in such a shape as to reflect the light emitted from the central portion of the arc tube 1 to each sealing portion 1a of the arc tube 1 and thus to the vicinity of the sealing portion 1a of the arc tube. There is.

【0020】[0020]

【表1】 [Table 1]

【0021】[表1]は、第1実施例、第2実施例およ
び従来の100Wのメタルハライドランプの垂直点灯時
および水平点灯時の初期特性をそれぞれ示している。
[表1]から明らかなように、第1実施例および第2実
施例におけるメタルハライドランプは、従来のメタルハ
ライドランプに比べて演色性に優れ、色温度も目標であ
る4300Kに近い値を実現している。また、点灯方向
による特性の変動も第1実施例および第2実施例のメタ
ルハライドランプの方が少ない。
[Table 1] shows the initial characteristics of the first and second embodiments and the conventional 100 W metal halide lamp at the time of vertical lighting and at the time of horizontal lighting, respectively.
As is clear from [Table 1], the metal halide lamps in the first and second embodiments have excellent color rendering properties as compared with the conventional metal halide lamps, and the color temperature is close to the target value of 4300K. There is. Further, the variation in characteristics depending on the lighting direction is smaller in the metal halide lamps of the first and second embodiments.

【0022】このように、本発明によると、色特性に優
れ、点灯方向による特性変動が小さいメタルハライドラ
ンプを提供することができる。
As described above, according to the present invention, it is possible to provide a metal halide lamp having excellent color characteristics and having a small characteristic variation depending on the lighting direction.

【0023】次に、発光管の破損に伴なう外管の破損発
生防止を評価するために行なった強制破損試験について
説明する。
Next, a forced breakage test carried out to evaluate the prevention of damage to the outer tube due to breakage of the arc tube will be described.

【0024】まず、強制破損試験は、図6に示す強制破
損試験用の回路を準備し、試験の対象となるメタルハラ
イドランプ14を電源15の電源電圧480Vで安定点
灯させた後、チョーク安定器16をスイッチ17で短絡
させて発光管1を破損させるものである。試験の結果、
従来のメタルハライドランプは10本中の2本が外管2
のトップ側において破損したのに対して、第1実施例お
よび第2実施例のメタルハライドランプは保温板11,
13が発光管1の破片の飛散を遮断したため、10本の
すべてにおいて外管2は破損しなかった。
First, in the forced breakage test, the circuit for the forced breakage test shown in FIG. 6 is prepared, the metal halide lamp 14 to be tested is stably lit at the power supply voltage 480 V of the power supply 15, and then the choke ballast 16 is provided. Is short-circuited by the switch 17 to damage the arc tube 1. Test results,
Conventional metal halide lamps have 2 out of 10 outer tubes.
While the metal halide lamps of the first and second embodiments are damaged on the top side of the heat insulating plate 11,
Since 13 blocked the scattering of the fragments of the arc tube 1, the outer tube 2 was not damaged in all of the 10 tubes.

【0025】このように、本発明によると、寿命末期に
発光管1が破損しても外管2の破損を防止することので
きるメタルハライドランプを提供することができる。
As described above, according to the present invention, it is possible to provide a metal halide lamp capable of preventing the outer tube 2 from being damaged even if the arc tube 1 is damaged at the end of its life.

【0026】さらに、従来のメタルハライドランプおよ
び本発明実施例のメタルハライドランプを用いて落下試
験を行なった。試験方法は、メタルハライドランプを厚
紙筒で2重に包装し、50cmの高さから落下させるも
のである。その結果、従来のメタルハライドランプは、
10本中4本の保護筒4が破損したのに対して、本発明
のメタルハライドは10本とも破損が発生しなかった。
Further, a drop test was conducted using the conventional metal halide lamp and the metal halide lamp of the embodiment of the present invention. In the test method, a metal halide lamp is doubly wrapped in a cardboard cylinder and dropped from a height of 50 cm. As a result, the conventional metal halide lamp
While 4 out of 10 protective cylinders 4 were damaged, no damage occurred in all 10 metal halides of the present invention.

【0027】このように、本発明によると、外管破損防
止用の保護筒4を有し、さらに衝撃に強いメタルハライ
ドランプを提供することができる。
As described above, according to the present invention, it is possible to provide a metal halide lamp which has the protective tube 4 for preventing the outer tube from being damaged and which is further resistant to impact.

【0028】なお、上記各実施例においては、ハロゲン
化金属としてDyI3 −HoI3 −TmI3 −TlI−
NaIの組成のハロゲン化物、保温板11,13の材料
としてNiメッキしたFe板を用いたが、その他のハロ
ゲン化金属、またその他の材質からなる保温板11,1
3を用いてもよい。
[0028] In the above embodiments, DyI 3 -HoI 3 -TmI 3 as metal halide -TlI-
The halide having the composition of NaI and the Fe plate plated with Ni were used as the material for the heat insulating plates 11 and 13, but other metal halides or the heat insulating plates 11 and 1 made of other materials were used.
3 may be used.

【0029】[0029]

【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、垂直点灯型のメタルハライドランプの
場合には高演色で高効率の優れた色特性を得ることがで
きるとともにランプ全方向点灯型のメタルハライドラン
プの場合には全点灯方向において良好なランプ特性を実
現することができる。また、寿命末期の発光管の破損に
伴う外管の破損を防止することができ安全性の高いメタ
ルハライドランプを実現することができるとともに、メ
タルハライドランプに衝撃が加わったときの発光管と保
護筒との衝突および保護筒と外管との衝突を防止するの
で衝撃に強いメタルハライドランプを実現することがで
きる。
As described above, in the case of a vertical lighting type metal halide lamp, the metal halide lamp of the present invention can obtain excellent color characteristics with high color rendering and high efficiency and can be used in all directions of the lamp. In the case of a metal halide lamp, good lamp characteristics can be realized in all lighting directions. In addition, it is possible to prevent the damage of the outer tube due to the damage of the arc tube at the end of its life, and to realize a highly safe metal halide lamp, and to protect the arc tube and the protective tube when the metal halide lamp is impacted. It is possible to realize a metal halide lamp that is resistant to impacts because it prevents collisions between the protection tube and the outer tube.

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

【図1】本発明の第1実施例であるメタルハライドラン
プの正面断面図。
FIG. 1 is a front sectional view of a metal halide lamp according to a first embodiment of the present invention.

【図2】同じく保温板の平面図。FIG. 2 is a plan view of the heat insulating plate.

【図3】同じく保温板の正面断面図。FIG. 3 is a front sectional view of the heat insulating plate.

【図4】本発明の第2実施例であるメタルハライドラン
プの保温板の平面図。
FIG. 4 is a plan view of a heat insulating plate of a metal halide lamp that is a second embodiment of the present invention.

【図5】同じく保温板の正面断面図。FIG. 5 is a front sectional view of the heat insulating plate.

【図6】発光管の強制破損試験の回路図。FIG. 6 is a circuit diagram of a forced damage test of an arc tube.

【図7】従来のメタルハライドランプの正面断面図。FIG. 7 is a front sectional view of a conventional metal halide lamp.

【符号の説明】[Explanation of symbols]

1 発光管 1a 封止部 2 外管 3 熱反射膜 4 保護筒 5 保温板 10 金属板 11,13 保温板 12 脚部 1 Arc Tube 1a Sealing Part 2 Outer Tube 3 Heat Reflecting Film 4 Protective Cylinder 5 Heat Insulation Plate 10 Metal Plates 11, 13 Heat Insulation Plate 12 Legs

───────────────────────────────────────────────────── フロントページの続き (72)発明者 山本 高詩 大阪府高槻市幸町1番1号 松下電子工業 株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Yamamoto 1-1 Sachimachi, Takatsuki City, Osaka Prefecture Matsushita Electronics Industrial Co., Ltd.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 両端に封止部が設けられ、かつ内部に一
対の電極が設けられ、さらにハロゲン化金属および緩衝
ガスが封入された発光管と、前記発光管を内蔵した外管
と、前記外管内で前記発光管を囲繞するように設けられ
た透光性の保護筒とを備え、前記発光管と前記保護筒と
の間に前記発光管と保護筒とを連結するように設けら
れ、前記発光管周辺のガスの対流を抑制することにより
前記封止部を保温する保温板を備えていることを特徴と
するメタルハライドランプ。
1. An arc tube having sealing parts provided at both ends, a pair of electrodes provided inside, and a metal halide and a buffer gas sealed therein; an outer tube containing the arc tube; A translucent protective tube provided so as to surround the arc tube in an outer tube, and provided so as to connect the arc tube and the protective tube between the arc tube and the protective tube, A metal halide lamp comprising a heat insulating plate for keeping the sealed portion warm by suppressing convection of gas around the arc tube.
【請求項2】 保温板は、発光管の中央部からの放射光
を前記発光管の封止部近傍へ反射するような形状に形成
されていることを特徴とする請求項1に記載のメタルハ
ライドランプ。
2. The metal halide according to claim 1, wherein the heat insulating plate is formed in a shape that reflects the emitted light from the central portion of the arc tube to the vicinity of the sealed portion of the arc tube. lamp.
JP05196278A 1993-08-06 1993-08-06 Metal halide lamp Expired - Fee Related JP3110213B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP05196278A JP3110213B2 (en) 1993-08-06 1993-08-06 Metal halide lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP05196278A JP3110213B2 (en) 1993-08-06 1993-08-06 Metal halide lamp

Publications (2)

Publication Number Publication Date
JPH0757699A true JPH0757699A (en) 1995-03-03
JP3110213B2 JP3110213B2 (en) 2000-11-20

Family

ID=16355149

Family Applications (1)

Application Number Title Priority Date Filing Date
JP05196278A Expired - Fee Related JP3110213B2 (en) 1993-08-06 1993-08-06 Metal halide lamp

Country Status (1)

Country Link
JP (1) JP3110213B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002523871A (en) * 1998-08-18 2002-07-30 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 Lamp with protective sleeve
JP2009129910A (en) * 2007-11-23 2009-06-11 Osram Sylvania Inc Ceramic high luminance discharge arc tube assembly
WO2010112315A1 (en) * 2009-04-02 2010-10-07 Osram Gesellschaft mit beschränkter Haftung Electrical lamp having an outer bulb

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002523871A (en) * 1998-08-18 2002-07-30 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 Lamp with protective sleeve
JP2009129910A (en) * 2007-11-23 2009-06-11 Osram Sylvania Inc Ceramic high luminance discharge arc tube assembly
WO2010112315A1 (en) * 2009-04-02 2010-10-07 Osram Gesellschaft mit beschränkter Haftung Electrical lamp having an outer bulb

Also Published As

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