JPH0465493B2

JPH0465493B2 -

Info

Publication number: JPH0465493B2
Application number: JP56200465A
Authority: JP
Inventors: Naoki Saito
Original assignee: Matsushita Electronics Corp
Current assignee: Panasonic Holdings Corp
Priority date: 1981-12-11
Filing date: 1981-12-11
Publication date: 1992-10-20
Also published as: JPS58102457A

Description

[Detailed description of the invention]

本発明は高圧放電ランプに関するものである。高圧放電ランプは、発光部分が小さい割に光束
が多いことから、一般照明に多く使われている。このような高圧放電ランプは外管内に発光管が
組込まれた二重管構造であつて、発光管は通常ス
テム線により支持されている。ところで、通常
200W以上の高ワツトにおいては、外管の頂部に
突起を設けるか、バルブ支持板を設けて、ステム
線の先端部をこれらに保持することにより、ラン
プに振動、衝撃が加わつても、発光管に変位を生
じないようになつている。一方低ワツトのランプ
においては、発光管の重量が小さいこともあつ
て、通常は一端部がステムに埋め込まれた長短２
本のステム線の他端部間に発光管が支持され、こ
の他端部は外管のどこにも接触しない簡素化した
構造となつている。しかし、このような構造では重い発光管を使用
すると、ランプに振動、衝撃が加わつた場合、発
光管の変位や、ステムのステム線埋設部分に破損
を生じることがある。本発明はこのような問題にかんがみてなされた
ものであり、部品点数の増加を極力抑え、振動、
衝撃に対して強く、構成が簡単で安価な高圧放電
ランプを提供するものである。以下本発明の一実施例を図面とともに説明す
る。第１図および第２図において、１は外径125mm
の硬質ガラスからなる球形の外管である。２は外
径9.6mm、全長61mmの高圧ナトリウムランプ用の
発光管である。発光管２の両端部には先端に電極
（図示せず）を有する主としてニオブからなる電
極導体３，３′が設けられ、その末端部が外部に
突出している。これらに発光管支持板４，４′の
一端部がそれぞれ接続され、この他端部が直径
1.8mmのニツケルメツキ鉄からなる長短２本のス
テム線５，５′にそれぞれ固定されることにより、
発光管２は外管１内に支持されている。長い方の
ステム線５の先端部は外管１のどこにも接触して
いない。ステム線５，５′は硬質ガラスからなる
ステム６により支持され、これを貫通して口金７
に接続されている。ステム６は外管１のネツク部
にこの管軸方向に沿つて設けられる。ステム６に
は幅５mm、厚さ0.4mmのニツケル板からなる金属
対８が取付けられ、その両端部は扁平となつて突
合わされて溶接されている。９は直径1.8mmのニ
ツケルメツキ鉄線からなる金属補強体である。金
属補強体９は金属体８に一端部が溶接固定され、
この一端部からステム６に沿つて発光管２へ向
い、途中で曲折して長い方のステム線５へ向つ
て、他端部がこの長い方のステム線５に溶接固定
されている。そして、長い方のステム線５とステ
ム６の中心軸とを含む平面と、金属補強体９のス
テム６に沿う部分とステム６の中心軸とを含む平
面とのなす角度θ（第３図において、Ｘ−X′軸を
含む平面とＹ−Y′軸を含む平面とのなす角度θ）
が90度になつている。１０はゲツタリングであ
る。かかるランプをダンボール箱に収納し、これを
高さ７cmの位置からコンクリートの床に、ダンボ
ール箱の３面、３角、６稜があたるように、落下
させる試験を行なつたところ、発光管２の変位
（発光管の外管軸からの位置ずれ）や、ステム６
の破損はまつたく生じなかつた。これに対して、上記構成のランプにおいて、金
属補強体がなく、長短２本のステム線によつての
み発光管を支持したものについても、同じ落下試
験を行なつたところ、ステムの長い方のステム線
埋設部分に破損が発生し、またこれによつて発光
管が大きく変位してしまつた。本発明の構成を採ることによつて、ステムの破
損や、発光管の変位を防止することができるの
は、次のような理由によるものと考えられる。す
なわち、ランプに加わる振動、衝撃力はステム線
がステムに埋設される部分においてとくに大きい
が、これが上記金属補強体によつて横方向にも分
散されて、ステムのほぼ全体に分けられるからで
あると考えられる。さらに、発明者は上記結果に基づき、角度θを
０度、20度、30度、45度、60度、120度、140度と
種々変えたランプを製作し、これらについて上記
と同じ落下試験を行なつたところ、下表に示すと
おりの結果を得た。 The present invention relates to high pressure discharge lamps. High-pressure discharge lamps are often used for general lighting because they have a small light-emitting area and a large luminous flux. Such high-pressure discharge lamps have a double-tube structure in which an arc tube is built into an outer bulb, and the arc tube is usually supported by a stem wire. By the way, usually
For high wattage of 200W or more, by providing a protrusion on the top of the outer bulb or a bulb support plate, and holding the tip of the stem wire on these, the bulb will remain stable even if vibrations or shocks are applied to the lamp. It is designed so that no displacement occurs. On the other hand, in low-wattage lamps, because the weight of the arc tube is small, it is usually a long or short tube with one end embedded in the stem.
The arc tube is supported between the other ends of the stem wire of the book, and this other end has a simplified structure that does not touch any part of the outer tube. However, in such a structure, if a heavy arc tube is used, if vibration or impact is applied to the lamp, the arc tube may be displaced or the stem wire buried portion of the stem may be damaged. The present invention was made in view of these problems, and it suppresses the increase in the number of parts as much as possible, and reduces vibration and
To provide a high-pressure discharge lamp that is strong against impact, has a simple structure, and is inexpensive. An embodiment of the present invention will be described below with reference to the drawings. In Figures 1 and 2, 1 is an outer diameter of 125 mm.
It is a spherical outer tube made of hard glass. 2 is an arc tube for high-pressure sodium lamps with an outer diameter of 9.6 mm and a total length of 61 mm. Electrode conductors 3, 3' made mainly of niobium and having electrodes (not shown) at their tips are provided at both ends of the arc tube 2, and their terminal ends protrude to the outside. One end of the arc tube support plates 4, 4' is connected to these, and the other end has a diameter of
By being fixed to the two long and short stem wires 5 and 5' made of 1.8 mm nickel plated iron,
The arc tube 2 is supported within the outer tube 1. The tip of the longer stem wire 5 is not in contact with any part of the outer tube 1. The stem wires 5, 5' are supported by a stem 6 made of hard glass, and pass through this to the base 7.
It is connected to the. The stem 6 is provided at the neck portion of the outer tube 1 along the tube axis direction. A metal pair 8 consisting of a nickel plate having a width of 5 mm and a thickness of 0.4 mm is attached to the stem 6, and both ends thereof are flattened, abutted, and welded. 9 is a metal reinforcing body made of nickel metal wire with a diameter of 1.8 mm. One end of the metal reinforcing body 9 is fixed to the metal body 8 by welding,
From this one end, it runs along the stem 6 toward the arc tube 2, bends in the middle, and heads toward the longer stem line 5, and the other end is welded and fixed to the longer stem line 5. Then, the angle θ formed by a plane including the longer stem line 5 and the central axis of the stem 6, and a plane including the portion of the metal reinforcing body 9 along the stem 6 and the central axis of the stem 6 (in FIG. , the angle θ between the plane containing the X-X' axis and the plane containing the Y-Y' axis)
is now 90 degrees. 10 is gettering. When such a lamp was stored in a cardboard box and the lamp was dropped from a height of 7 cm onto a concrete floor so that the 3 sides, 3 corners, and 6 edges of the cardboard box hit, it was found that the luminous tube 2 displacement (displacement of the arc tube from the outer tube axis), stem 6
No damage occurred. On the other hand, when we performed the same drop test on a lamp with the above configuration, which had no metal reinforcement and supported only the two long and short stem wires, it was found that the longer stem The part where the stem wire was buried was damaged, and the arc tube was significantly displaced as a result. The reason why it is possible to prevent damage to the stem and displacement of the arc tube by adopting the configuration of the present invention is considered to be due to the following reasons. In other words, the vibration and impact force applied to the lamp is particularly large in the part where the stem wire is embedded in the stem, but this is because this is also dispersed laterally by the metal reinforcement and distributed over almost the entire stem. it is conceivable that. Furthermore, based on the above results, the inventor manufactured lamps with various angles θ of 0 degrees, 20 degrees, 30 degrees, 45 degrees, 60 degrees, 120 degrees, and 140 degrees, and conducted the same drop test as above on these lamps. As a result, the results shown in the table below were obtained.

【表】上表に示す結果から明らかなように、角度θの
大きさが重要であり、角度θが30〜120度の範囲
にあるとき、本発明の所期の効果が得られた。なお、上記の試験結果は、金属補強体の長い方
のステム線への固定位置を変えてみても変わらな
いことが別の実験により認められた。第４図は本発明の他の実施例を示し、金属補強
体１１の一端部がステム６に巻付けられ、終端部
が溶接されることにより固定されたものである。
なお、この場合には金属補強体が巻付けられるス
テムの個所にあらかじめ溝を成形加工しておけ
ば、その巻付部がステムに堅固に固定されるもの
である。この実施例のものも上記第１の実施例と同様の
効果を有する。なお、金属補強体を設けた場合でも、この他端
部を短い方のステム線に固定したときには、ラン
プに加えられた振動、衝撃によりステムが破損し
たり、発光管に変位が生じたりすることが実験に
より確認された。なお、上記第１および第２の実施例のものでは
金属補強体が金属線であつたが、金属板でもよ
く、また第１の実施例では金属体が金属板であつ
たが、金属線でもよいことはいうまでもない。以上説明したように、本発明によれば、長い方
のステム線の先端部が外管内に保持されていない
場合にも、部品点数の増加を最小限にとどめつ
つ、振動、衝撃によりステムの破損や発光管の変
位が発生せず、ランプ電圧、色温度、平均演色評
価数等のランプ特性の変化を防止することができ
高圧放電ランプが実現されるものである。[Table] As is clear from the results shown in the above table, the magnitude of the angle θ is important, and the desired effect of the present invention was obtained when the angle θ was in the range of 30 to 120 degrees. In addition, it was found in another experiment that the above test results did not change even if the fixing position of the metal reinforcing body to the longer stem line was changed. FIG. 4 shows another embodiment of the present invention, in which one end of the metal reinforcing body 11 is wrapped around the stem 6, and the terminal end is fixed by welding.
In this case, if a groove is formed in advance at the portion of the stem around which the metal reinforcing body is wound, the wound portion can be firmly fixed to the stem. This embodiment also has the same effects as the first embodiment. Even if a metal reinforcement is provided, if the other end is fixed to the shorter stem wire, vibrations or shocks applied to the lamp may damage the stem or cause displacement of the arc tube. was confirmed by experiment. In the first and second embodiments, the metal reinforcing body was a metal wire, but it could also be a metal plate.Although the metal body was a metal plate in the first embodiment, it could also be a metal wire. Needless to say, it's a good thing. As explained above, according to the present invention, even when the tip of the longer stem wire is not held in the outer tube, the stem can be damaged by vibration or impact while minimizing the increase in the number of parts. A high-pressure discharge lamp is realized in which no displacement of the arc tube occurs, and changes in lamp characteristics such as lamp voltage, color temperature, and average color rendering index can be prevented.

[Brief explanation of the drawing]

第１図は本発明の一実施例である高圧放電ラン
プの正面図、第２図は同じく側面図、第３図は同
じく上面図、第４図は本発明の他の実施例である
高圧放電ランプの正面図である。１……外管、２……発光管、５，５′……ステ
ム線、６……ステム、８……金属体、９，１１…
…金属補強体。 FIG. 1 is a front view of a high-pressure discharge lamp that is an embodiment of the present invention, FIG. 2 is a side view, FIG. 3 is a top view, and FIG. 4 is a high-pressure discharge lamp that is another embodiment of the present invention. FIG. 3 is a front view of the lamp. DESCRIPTION OF SYMBOLS 1... Outer tube, 2... Arc tube, 5, 5'... Stem wire, 6... Stem, 8... Metal body, 9, 11...
...Metal reinforcement.

Claims

[Scope of Claims] 1. An outer tube, a stem provided on the outer tube along the tube axis direction, two long and short stem wires supported by the stem, and two long and short stem wires inside the outer tube.
an arc tube supported by a stem wire of a book; a metal body attached to the stem; one end fixed to the metal body; and a metal reinforcing body having the other end fixed to the longer stem line along the longer stem line, and a plane including the longer stem line and the central axis of the stem. , the angle between the part of the metal reinforcement along the stem and the plane containing the central axis of the stem is 30
A high-pressure discharge lamp characterized by being selected in the range of ~120 degrees. 2 an outer tube, a stem provided on the outer tube along the tube axis direction, two long and short stem lines supported by the stem, and two long and short stem lines inside the outer tube.
An arc tube supported by a main stem wire, one end of which is fixed by being wrapped around the stem, and which extends from the one end along the stem toward the arc tube and bends in the middle to connect the longer stem. a metal reinforcement whose other end is fixed to the longer stem wire, the plane including the longer stem wire and the central axis of the stem; 1. A high-pressure discharge lamp characterized in that an angle formed between a portion along the stem and a plane including the central axis of the stem is set in a range of 30 to 120 degrees.