JP3379405B2 - Halogen bulb - Google Patents
Halogen bulbInfo
- Publication number
- JP3379405B2 JP3379405B2 JP26315197A JP26315197A JP3379405B2 JP 3379405 B2 JP3379405 B2 JP 3379405B2 JP 26315197 A JP26315197 A JP 26315197A JP 26315197 A JP26315197 A JP 26315197A JP 3379405 B2 JP3379405 B2 JP 3379405B2
- Authority
- JP
- Japan
- Prior art keywords
- sealing portion
- stem
- sealing
- filament
- arc tube
- 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
Links
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は、ハロゲン電球に関
するものである。
【０００２】
【従来の技術】従来、住宅照明用や店舗照明に用いられ
るハロゲン電球としては、図２に示すように、閉塞部
１、回転楕円体部２、縮径部３、円筒部４、封着部５と
順次連続した形状の発光管６の外表面に赤外線反射可視
光透過膜７を設け、発光管６の回転楕円体部２内にフィ
ラメント８が位置して設けられている。
【０００３】フィラメント８は、長短２本の内部リード
線９，１０の一端部間に架設されている。内部リード線
９，１０はステム１１によって固定されている。内部リ
ード線９，１０の他端部は封着部５内に封着された金属
箔１２，１３の一端部にそれぞれ接続されている。金属
箔１２，１３の他端部には外部リード線１５，１６の一
端部がそれぞれ接続されており、外部リード線１５，１
６の他端部は封着部５から発光管外部にそれぞれ導出さ
れている。
【０００４】外部リード線１５はヒューズ１７を介して
口金１８の金属製給電部１９に接続されており、外部リ
ード線１６は中間リード線２０を介して口金１８の先端
に接続されている。口金１８は接着剤２２にて封着部５
に固着されている。
【０００５】通常のＡＣ１００〜１０７Ｖ程度の商用電
源で使用されている消費電力２５０Ｗ以下のハロゲン電
球においては、ステム１１の封着部側端面から円筒部４
と封着部５との境界部までの間隔Ｌが２．５ｍｍ以上で
あった。
【０００６】このような従来のハロゲン電球は通常、フ
ィラメント８が点灯中において徐々に細くなり、最終的
にフィラメント８の断線が起こり寿命を迎える。フィラ
メント８が断線した時、その断線箇所間でアーク放電が
起こり、その後、断線箇所で発生したアーク放電が２本
の内部リード線９，１０に転移し、その内部リード線
９，１０間でアーク放電が持続する。そして、このアー
ク放電によって定格電流の数十倍以上にも至る大電流が
流れ、ステム１１と封着部５との境界部間にある内部リ
ード線９，１０が、アーク放電を持続したまま急激に熱
せられ溶融されていく。やがて内部リード線９，１０の
溶融は封着部５の近傍にまで達し、最後には、封着部５
の近傍で生じるアーク放電の熱衝撃によって、あるいは
封着部５の内部にまで溶融が至ることによって、封着部
５は熱損傷を起こすこととなる。また、回転楕円体部２
を有する発光管６を用いているため、回転楕円体部２の
形成時に生じる発光管６の肉厚の不均一や残存歪みによ
り、熱損傷が生じやすいものと考えられる。
【０００７】従来、このような封着部５の熱損傷を防止
する手段としては、外部リード線１５と口金１８の金属
製給電部１９との間に、Ｎｉ−Ｃｕ合金からなるヒュー
ズ１７を設けている。このヒューズ１７によって、異常
昇熱時にはヒューズ１７が先に溶断し、外部リード線１
５への送電を止め、封着部５の熱的損傷を防止しようと
している。
【０００８】
【発明が解決しようとする課題】しかしながら、このよ
うにヒューズ１７を用いても、発光管６内で発生したア
ーク放電がヒューズ１７の溶断よりも早く封着部５近傍
に到達してしまうことがあり、その場合、封着部５が熱
損傷してしまうことがあった。また、ヒューズ１７の断
面積や長さおよび材質のバラツキによっても、ヒューズ
１７の溶断時間が延びてしまうことがあり、同様に封着
部５に熱損傷が生じることがあった。
【０００９】本発明はこのような課題を解決しようとす
るもので、フィラメント断線後、フィラメント断線箇所
間に発生したアーク放電を封着部近傍に転移させないよ
うにして、封着部の熱損傷の発生を防止することを目的
とする。
【００１０】
【課題を解決するための手段】本発明のハロゲン電球
は、商用電源電圧で使用されるハロゲン電球であって、
回転楕円体部、縮径部、筒部、封着部と順次連続した形
状からなる発光管の外表面に赤外線反射可視光透過膜が
設けられており、前記封着部から前記発光管内に延出し
た２本の内部リード線間にフィラメントが接続されてい
るとともに、２本の前記内部リード線はステムによって
固定され、アーク放電を前記封着部の近傍に転移させな
いように、前記ステムの封着部側端面から前記筒部と前
記封着部との境界部までの間隔Ｌを２ｍｍ以下とした構
成を有している。
【００１１】これにより、フィラメントの断線後に発生
したアーク放電が、ステムと封着部との間にある内部リ
ード線間に転移することを防止でき、封着部において熱
損傷が生じることを防止することができる。
【００１２】
【発明の実施の形態】本発明の一実施形態である９０Ｗ
形の片口金形のハロゲン電球（以下、本発明品という）
は、図１に示すように、閉塞部１、回転楕円体部２、縮
径部３、円筒部４、封着部５と順次連続した形状の石英
からなる発光管６の外表面に赤外線反射可視光透過膜７
を設け、発光管６の回転楕円体部２内にタングステンか
らなるフィラメント８が位置して設けられている。
【００１３】フィラメント８は、長短２本のタングステ
ン又はモリブデンからなる内部リード線９，１０の一端
部間に架設されている。
【００１４】内部リード線９，１０はステム１１によっ
て固定されている。内部リード線９，１０の他端部は封
着部５内に封着された金属箔１２，１３の一端部にそれ
ぞれ接続されている。フィラメント８は回転楕円体部２
の中心軸上に設けられ、石英からなるステム１１に植設
したアンカー線１４で保持されている。
【００１５】金属箔１２，１３の他端部にはモリブデン
からなる外部リード線１５，１６の一端部がそれぞれ接
続されており、外部リード線１５，１６の他端部は封着
部５から発光管外部にそれぞれ導出されている。外部リ
ード線１５はヒューズ１７を介して口金１８の金属製給
電部１９に接続されており、外部リード線１６は中間リ
ード線２０を介して口金１８の先端に銀ろう２１にて接
続されている。口金１８はセメント等の接着剤２２にて
封着部５に固着されている。
【００１６】発光管６内には臭素の炭化水素化合物等よ
りなるハロゲン化合物の他にＸｅ、Ｋｒ、Ａｒ、Ｎ2等
の不活性ガスが０．２〜０．４ＭＰａ程度封入されてい
る。発光管６の外表面に形成した赤外反射可視透過膜７
はＴａ、Ｔｉ、Ｓｉ等の酸化物の多層膜からなる。
【００１７】発光管６内に位置するステム１１の封着部
側端面から円筒部４と封着部５との境界部までの間隔
Ｌ、すなわちステム１１と封着部５との間隔Ｌは２ｍｍ
としている。
【００１８】上記した本発明品と、ステムの封着部側端
面から円筒部と封着部との境界部までの間隔Ｌが２．５
ｍｍである従来のハロゲン電球（以下、比較品という）
とを用いて、フィラメント断線時におけるアーク放電に
よる封着部の熱損傷の発生割合を比較する実験を行った
ところ、比較品における熱損傷の発生割合は７０％であ
り、高い確率で封着部に熱損傷が発生した。それに対
し、本発明品における熱損傷の発生割合は、０％であ
り、封着部５の熱損傷は全く生じなかった。
【００１９】また、このような結果について、種々検討
したところ、ステム１１と封着部５との間隔Ｌを狭く、
すなわち、間隔Ｌを２ｍｍ以下とすることで、フィラメ
ント８の断線後に発生したアーク放電が、ステム１１と
封着部５との間にある内部リード線９，１０間に転移す
ることがなく、封着部５において熱損傷が生じないこと
がわかった。
【００２０】また、他の実施形態として、５０Ｗ形、１
４０Ｗ形、１９０Ｗ、２５０Ｗ形のハロゲン電球を同様
の構成として実験を行ったところ、いずれの電球におい
ても、封着部５の熱損傷は０％であった。
【００２１】なお、ステム１１と封着部５との間隔Ｌが
２．５ｍｍ以上のハロゲン電球では封着部５において、
熱損傷が発生し、実用上支障をきたした。
【００２２】
【発明の効果】以上のように、本発明は、フィラメント
の断線により、このフィラメントの断線箇所間で発生し
たアーク放電が、ステムと封着部との間の内部リード線
間に転移しないため、封着部近傍、すなわち、ステムと
封着部との間の２本の内部リード線間で起こりうるアー
ク放電を防止でき、封着部の熱損傷の発生を防止するこ
とができ、より一層安全なハロゲン電球を提供すること
ができる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a halogen lamp. 2. Description of the Related Art Conventionally, as a halogen bulb used for house lighting and store lighting, as shown in FIG. 2, a closed part 1, a spheroidal part 2, a reduced diameter part 3, a cylindrical part 4, An infrared reflective visible light transmitting film 7 is provided on the outer surface of a light emitting tube 6 having a shape that is sequentially continuous with the sealing portion 5, and a filament 8 is provided in the spheroidal portion 2 of the light emitting tube 6. [0003] A filament 8 is provided between one ends of two long and short internal lead wires 9 and 10. The internal leads 9 and 10 are fixed by a stem 11. The other ends of the internal leads 9 and 10 are connected to one ends of metal foils 12 and 13 sealed in the sealing portion 5, respectively. One ends of external leads 15 and 16 are connected to the other ends of the metal foils 12 and 13, respectively.
The other end of 6 is led out of the arc tube from the sealing portion 5. The external lead 15 is connected to a metal power supply 19 of a base 18 via a fuse 17, and the external lead 16 is connected to the end of the base 18 via an intermediate lead 20. The base 18 is sealed with an adhesive 22 at the sealing portion 5.
It is stuck to. In a halogen lamp having a power consumption of 250 W or less, which is generally used with a commercial power supply of about 100 to 107 V AC, a cylindrical portion 4 is connected from the end face of the stem 11 on the sealing portion side.
The distance L to the boundary between the sealing part 5 and the sealing part 5 was 2.5 mm or more. [0006] Such a conventional halogen bulb usually becomes gradually thinner while the filament 8 is turned on, and eventually the filament 8 is broken and reaches its end of life. When the filament 8 is broken, an arc discharge occurs between the broken portions, and thereafter, the arc discharge generated at the broken portion is transferred to the two internal leads 9 and 10, and an arc is generated between the internal leads 9 and 10. Discharge continues. This arc discharge causes a large current of several tens times or more of the rated current to flow, and the internal leads 9 and 10 between the boundary between the stem 11 and the sealing portion 5 suddenly maintain the arc discharge. It is heated and melted. Eventually, the melting of the internal leads 9 and 10 reaches the vicinity of the sealing portion 5, and finally, the melting of the sealing portions 5.
The sealing portion 5 is thermally damaged by the thermal shock of the arc discharge generated in the vicinity of the sealing portion or by melting reaching inside the sealing portion 5. In addition, the spheroid 2
It is considered that thermal damage is likely to occur due to uneven thickness and residual distortion of the arc tube 6 generated when the spheroidal portion 2 is formed because the arc tube 6 having the following is used. Conventionally, as means for preventing such thermal damage to the sealing portion 5, a fuse 17 made of a Ni--Cu alloy is provided between the external lead wire 15 and a metal power supply portion 19 of a base 18. ing. The fuse 17 is blown first by the fuse 17 at the time of abnormal heating, and the external lead 1
5 to stop thermal damage to the sealing portion 5. However, even when the fuse 17 is used, the arc discharge generated in the arc tube 6 reaches the vicinity of the sealing portion 5 earlier than the fuse 17 is blown. In such a case, the sealing portion 5 may be thermally damaged. Also, the fusing time of the fuse 17 may be extended due to the variation in the cross-sectional area, length, and material of the fuse 17, and similarly, the sealing portion 5 may be thermally damaged. The present invention is intended to solve such a problem. After the filament is broken, the arc discharge generated between the broken portions of the filament is prevented from being transferred to the vicinity of the sealed portion, thereby reducing the heat damage of the sealed portion. The purpose is to prevent occurrence. [0010] A halogen lamp according to the present invention is a halogen lamp used at a commercial power supply voltage,
An infrared reflective visible light transmitting film is provided on the outer surface of the arc tube having a shape that is sequentially continuous with the spheroidal portion, the reduced diameter portion, the cylindrical portion, and the sealing portion, and extends from the sealing portion into the arc tube. A filament is connected between the two internal leads, and the two internal leads are fixed by a stem so that arc discharge is not transferred to the vicinity of the sealing portion.
Unusually, it has a configuration in which not more than 2mm spacing L to the boundary portion between the sealing portion and the tubular portion from the sealing portion side end surface of the stem. Thus, it is possible to prevent the arc discharge generated after the breaking of the filament from being transferred between the internal lead wires between the stem and the sealing portion, and to prevent heat damage at the sealing portion. be able to. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 90W according to an embodiment of the present invention.
Halogen bulb with a single base (hereinafter referred to as the present invention)
As shown in FIG. 1, an infrared ray is reflected on the outer surface of an arc tube 6 made of quartz having a shape that is sequentially connected to a closing portion 1, a spheroidal portion 2, a reduced diameter portion 3, a cylindrical portion 4, and a sealing portion 5. Visible light transmitting film 7
And a filament 8 made of tungsten is provided in the spheroid 2 of the arc tube 6. The filament 8 is provided between one ends of internal lead wires 9 and 10 made of two long and short tungsten or molybdenum. The internal leads 9 and 10 are fixed by a stem 11. The other ends of the internal leads 9 and 10 are connected to one ends of metal foils 12 and 13 sealed in the sealing portion 5, respectively. Filament 8 is spheroidal part 2
And held by an anchor wire 14 implanted in a stem 11 made of quartz. The other ends of the metal foils 12 and 13 are connected to one ends of external lead wires 15 and 16 made of molybdenum, respectively. The other ends of the external leads 15 and 16 emit light from the sealing portion 5. Each is led out of the pipe. The external lead 15 is connected to a metal power supply 19 of a base 18 via a fuse 17, and the external lead 16 is connected to the tip of the base 18 via a silver lead 21 via an intermediate lead 20. . The base 18 is fixed to the sealing portion 5 with an adhesive 22 such as cement. The arc tube 6 is filled with an inert gas such as Xe, Kr, Ar, or N 2 at a rate of about 0.2 to 0.4 MPa in addition to a halogen compound such as a bromine hydrocarbon compound. Infrared reflective visible light transmitting film 7 formed on the outer surface of arc tube 6
Is composed of a multilayer film of an oxide such as Ta, Ti, and Si. The distance L between the end face of the stem 11 located inside the arc tube 6 on the sealing part side and the boundary between the cylindrical part 4 and the sealing part 5, that is, the distance L between the stem 11 and the sealing part 5 is 2 mm.
And The distance L from the above-described product of the present invention to the boundary between the cylindrical portion and the sealing portion from the sealing portion side end surface of the stem is 2.5.
mm conventional halogen bulb (hereinafter referred to as comparative product)
An experiment was performed to compare the rate of occurrence of thermal damage in the sealed portion due to arc discharge when the filament was broken. The rate of occurrence of thermal damage in the comparative product was 70%, and the sealed portion had a high probability. Suffered thermal damage. On the other hand, the rate of occurrence of heat damage in the product of the present invention was 0%, and no heat damage of the sealing portion 5 occurred. Further, the above results were examined in various ways. As a result, the distance L between the stem 11 and the sealing portion 5 was reduced,
That is, by setting the interval L to 2 mm or less, the arc discharge generated after the breaking of the filament 8 does not transfer between the internal lead wires 9 and 10 between the stem 11 and the sealing portion 5, It was found that no thermal damage occurred in the attachment portion 5. In another embodiment, a 50W type, a 1W type,
When an experiment was performed using halogen lamps of 40W type, 190W, and 250W type in the same configuration, the thermal damage of the sealing portion 5 was 0% in any of the bulbs. In the case of a halogen lamp in which the distance L between the stem 11 and the sealing portion 5 is 2.5 mm or more, the sealing portion 5
Thermal damage occurred, which hindered practical use. As described above, according to the present invention, the arc discharge generated between the broken portions of the filament is transferred between the internal lead wires between the stem and the sealing portion due to the broken wire of the filament. Therefore, it is possible to prevent arc discharge that can occur between the two internal leads near the sealing portion, that is, between the stem and the sealing portion, and to prevent heat damage to the sealing portion. A safer halogen bulb can be provided.
【図面の簡単な説明】
【図１】本発明の一実施形態であるハロゲン電球の一部
切欠正面図
【図２】従来のハロゲン電球の一部切欠正面図
【符号の説明】
１ 閉塞部
２ 回転楕円体部
３ 縮径部
４ 円筒部
５ 封着部
６ 発光管
７ 赤外線反射可視光透過膜
８ フィラメント
９，１０ 内部リード線
１１ ステムBRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cutaway front view of a halogen bulb according to an embodiment of the present invention. FIG. 2 is a partially cutaway front view of a conventional halogen bulb. Spheroidal part 3 Reduced diameter part 4 Cylindrical part 5 Sealing part 6 Arc tube 7 Infrared reflective visible light transmitting film 8 Filament 9, 10 Internal lead wire 11 Stem
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) H01K 1/22 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. 7 , DB name) H01K 1/22
Claims (1)
であって、回転楕円体部、縮径部、筒部、封着部と順次
連続した形状からなる発光管の外表面に赤外線反射可視
光透過膜が設けられており、前記封着部から前記発光管
内に延出した２本の内部リード線間にフィラメントが接
続されているとともに、２本の前記内部リード線はステ
ムによって固定され、アーク放電を前記封着部の近傍に
転移させないように、前記ステムの封着部側端面から前
記筒部と前記封着部との境界部までの間隔Ｌを２ｍｍ以
下としたことを特徴とするハロゲン電球。(57) [Claims] [Claim 1] Halogen lamp used for commercial power supply voltage
An spheroidal part, a reduced diameter part, a cylindrical part, an infrared reflective visible light transmitting film is provided on the outer surface of an arc tube having a shape that is sequentially continuous with the sealing part, and A filament is connected between two internal leads extending into the arc tube, and the two internal leads are fixed by a stem, and arc discharge is caused near the sealing portion.
So as not to transfer, halogen bulb, characterized in that the distance L from the sealing portion side end surface of the stem to a boundary portion between the sealing portion and the tubular portion was 2mm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26315197A JP3379405B2 (en) | 1997-09-29 | 1997-09-29 | Halogen bulb |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26315197A JP3379405B2 (en) | 1997-09-29 | 1997-09-29 | Halogen bulb |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11102668A JPH11102668A (en) | 1999-04-13 |
| JP3379405B2 true JP3379405B2 (en) | 2003-02-24 |
Family
ID=17385520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26315197A Expired - Lifetime JP3379405B2 (en) | 1997-09-29 | 1997-09-29 | Halogen bulb |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3379405B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7232415B2 (en) * | 2019-07-17 | 2023-03-03 | ウシオ電機株式会社 | heating filament lamp |
-
1997
- 1997-09-29 JP JP26315197A patent/JP3379405B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11102668A (en) | 1999-04-13 |
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