JP2001076686A - Electric lamp - Google Patents
Electric lampInfo
- Publication number
- JP2001076686A JP2001076686A JP25115199A JP25115199A JP2001076686A JP 2001076686 A JP2001076686 A JP 2001076686A JP 25115199 A JP25115199 A JP 25115199A JP 25115199 A JP25115199 A JP 25115199A JP 2001076686 A JP2001076686 A JP 2001076686A
- Authority
- JP
- Japan
- Prior art keywords
- molybdenum
- filament coil
- rods
- sealing portion
- sealing
- 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
Links
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は電球に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light bulb.
【０００２】[0002]
【従来の技術】従来、例えば５０Ｗ以下の電球として、
図３に示すように、内部にフィラメントコイル１１を有
する発光部１２と、この発光部１２に連設された封止部
１３とを有する硬質ガラスからなるバルブ１４とを備
え、フィラメントコイル１１の両端部にタングステン棒
１５，１６の一端部が接続され、このタングステン棒１
５，１６の他端部とモリブデン棒１７，１８がそれぞれ
接続され、この接続部１９を封止部内に埋設したものが
知られている（実開昭６３−３５２５４号公報）。2. Description of the Related Art Conventionally, for example, as a light bulb of 50 W or less,
As shown in FIG. 3, a light-emitting unit 12 having a filament coil 11 therein and a bulb 14 made of hard glass having a sealing unit 13 connected to the light-emitting unit 12 are provided. One end of tungsten rods 15 and 16 is connected to the
It is known that the other ends of the molybdenum rods 5 and 16 are connected to molybdenum rods 17 and 18, respectively, and this connecting portion 19 is embedded in a sealing portion (Japanese Utility Model Laid-Open No. 63-35254).
【０００３】このような従来の電球は、熱膨張係数の近
似している硬質ガラスとモリブデン棒とを用いることに
よって、封止部における熱膨張・収縮の差によって発生
する応力を小さくすることができ、封止部のクラックの
発生を防止することができ、また、モリブデンからなる
金属箔を使用する必要が無く製造工程を簡略化できると
いうものである。[0003] In such a conventional light bulb, by using hard glass and a molybdenum rod having similar thermal expansion coefficients, the stress generated due to the difference in thermal expansion and contraction in the sealed portion can be reduced. In addition, it is possible to prevent the occurrence of cracks in the sealing portion, and it is not necessary to use a metal foil made of molybdenum, thereby simplifying the manufacturing process.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、図３に
示す従来の電球では、タングステン棒１５，１６の端部
とモリブデン棒１７，１８の端部とを突き合わせ溶接し
ているため、封止部１３を形成する際に加わるピンチャ
圧によってタングステン棒１５，１６とモリブデン棒１
７，１８との接合部１９に破損が起こりやすく、このた
め、導通不良となることがある。However, in the conventional light bulb shown in FIG. 3, since the ends of the tungsten rods 15, 16 and the ends of the molybdenum rods 17, 18 are butt-welded, the sealing portion 13 is not provided. The tungsten rods 15 and 16 and the molybdenum rod 1
The junction 19 between the first and the second junction 7 and the second junction 18 is likely to be damaged, which may result in poor conduction.
【０００５】また、小型で低ワットの電球ではタングス
テン棒１５，１６やモリブデン棒１７，１８の線径が非
常に小さいため、突き合わせ溶接を行うには精度を要
し、さらに時間がかかる上、両者間の溶接強度を充分に
確保するのが難しいという問題があった。In a small, low-wattage bulb, the tungsten rods 15, 16 and the molybdenum rods 17, 18 have extremely small wire diameters, so that butt welding requires high accuracy and takes much time. There is a problem that it is difficult to secure a sufficient welding strength between them.
【０００６】本発明はこのような問題を解決するために
なされたもので、リークの発生が無く製造も簡便で導通
不良等が生じることのない信頼性の高い電球を提供する
ことを目的とするのものである。The present invention has been made in order to solve such a problem, and an object of the present invention is to provide a highly reliable light bulb which is free from leakage, is easy to manufacture, and does not cause poor conduction. belongs to.
【０００７】[0007]
【課題を解決するための手段】本発明の電球は、内部に
フィラメントコイルを有する発光部と、前記発光部に連
設された封止部とを有する硬質ガラスからなるバルブを
備え、前記フィラメントコイルの端部または前記フィラ
メントコイルに接続された導入線の端部にモリブデン棒
の一端部が接続されているとともに、前記モリブデン棒
の他端部に外部リード線が接続されており、前記モリブ
デン棒および、前記フィラメントコイルの端部または前
記導入線と前記モリブデン棒との接続部分が封止部内に
設けられ、かつ前記フィラメントコイルの端部または前
記導入線と前記モリブデン棒との接続部分において、前
記モリブデン棒が平板形状を有している。According to the present invention, there is provided a light bulb comprising a bulb made of hard glass and having a light emitting portion having a filament coil therein and a sealing portion connected to the light emitting portion. One end of a molybdenum rod is connected to one end of the molybdenum rod or the end of a lead wire connected to the filament coil, and an external lead wire is connected to the other end of the molybdenum rod. A connection portion between the end portion of the filament coil or the lead-in wire and the molybdenum rod is provided in the sealing portion; and at the end portion of the filament coil or a connection portion between the lead-in wire and the molybdenum rod, the molybdenum rod is provided. The bar has a flat plate shape.
【０００８】これにより、封止部を形成する際に加わる
ピンチャ圧によって、タングステン棒または導入線とモ
リブデン棒との接合部が破損するのを防止でき、このた
め、導通不良となることを防止することができる。ま
た、小型で低ワットの電球において、線径の細いタング
ステン棒または導入線とモリブデン棒との接続を容易に
しかも短時間で行うことができ、さらにタングステン棒
または導入線とモリブデン棒との溶接強度を充分に確保
することができる。また、封止部における硬質ガラスと
モリブデン棒との封着状態を向上させることができ、気
密性を増大させることができる。Accordingly, it is possible to prevent the junction between the tungsten rod or the lead-in wire and the molybdenum rod from being damaged by the pincher pressure applied when forming the sealing portion, thereby preventing the occurrence of poor conduction. be able to. In addition, in a small, low-wattage light bulb, the connection between a tungsten rod or a lead wire having a small diameter and the molybdenum rod can be easily and quickly performed, and the welding strength between the tungsten rod or the lead wire and the molybdenum rod can be improved. Can be sufficiently secured. Further, the sealing state between the hard glass and the molybdenum rod in the sealing portion can be improved, and the airtightness can be increased.
【０００９】また、本発明の請求項２記載の発明は、請
求項１記載の電球において、前記モリブデン棒は、一端
部が平板形状で、他端部は円柱形状であり、前記平板形
状の部分と前記円柱形状の部分との間に傾斜部を有して
いる。According to a second aspect of the present invention, in the light bulb according to the first aspect, the molybdenum rod has one end having a flat plate shape, the other end having a cylindrical shape, and the flat plate portion. And an inclined portion between the cylindrical portion and the cylindrical portion.
【００１０】これにより、封止部内のモリブデン棒の平
板形状の部分の周囲において、封止部と封止物との境界
に形成される空隙がランプの使用にともなって広がるの
を塞き止めることができるので、早期にリークが発生す
るのを防止することができる。[0010] This prevents the gap formed at the boundary between the sealing portion and the sealed object from expanding with the use of the lamp around the flat portion of the molybdenum rod in the sealing portion. Therefore, it is possible to prevent the occurrence of a leak at an early stage.
【００１１】[0011]
【発明の実施の形態】以下、本発明の実施の形態につい
て図面を用いて説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１２】図１に示すように、本発明の一実施形態で
ある９Ｗ３．６Ｖの電球１は、内部にタングステンから
なる線径０．１ｍｍのフィラメントコイル２を有する発
光部３ａと、発光部３ａに連設された封止部３ｂとを有
する硬質ガラスからなるバルブ３を備えている。フィラ
メントコイル２の両端部２ａ，２ｂには長さ５．０ｍｍ
のモリブデン棒４，５の一端部がそれぞれ接続されてい
るとともに、モリブデン棒４，５の他端部にはＦｅ−Ｎ
ｉ−Ｃｏ合金からなる外部リード線６，７がそれぞれ接
続され、フィラメントコイル２、モリブデン棒４，５、
外部リード線６，７が一体化されたアセンブリを形成し
ている。このアセンブリは、フィラメントコイル２が発
光部３ａ内に位置するように設けられ、モリブデン棒
４，５および、フィラメントコイル２の両端部２ａ，２
ｂとモリブデン棒４，５との接続部８が封止部３ｂ内に
位置するよう封止されている。As shown in FIG. 1, a 9W3.6V light bulb 1 according to an embodiment of the present invention has a light emitting section 3a having a filament coil 2 made of tungsten and having a wire diameter of 0.1 mm, and a light emitting section 3a. And a bulb 3 made of hard glass and having a sealing portion 3b connected to the bulb. Both ends 2a and 2b of the filament coil 2 have a length of 5.0 mm.
One ends of the molybdenum rods 4 and 5 are connected to each other, and the other ends of the molybdenum rods 4 and 5 are Fe-N
External lead wires 6 and 7 made of an i-Co alloy are connected, respectively, and a filament coil 2, molybdenum rods 4 and 5,
The external leads 6,7 form an integrated assembly. This assembly is provided so that the filament coil 2 is located in the light emitting portion 3a, and the molybdenum rods 4, 5 and both ends 2a, 2 of the filament coil 2 are provided.
It is sealed so that the connection portion 8 between the b and the molybdenum rods 4, 5 is located in the sealing portion 3b.
【００１３】モリブデン棒４，５は熱膨張係数が５５×
１０-7／℃で、バルブ３の材質である硬質ガラスの熱膨
張係数は４３〜４４×１０-7／℃程度のものを使用して
いる。このように硬質ガラスとモリブデン棒４，５の熱
膨張係数は近似しているので、封止部３ｂにおける熱膨
張・収縮の差によって発生する応力を、石英ガラス（熱
膨張係数５．６×１０-7／℃）を用いたものよりも小さ
くすることができ、封止部３ｂでのクラック発生を抑制
できる。The molybdenum rods 4 and 5 have a thermal expansion coefficient of 55 ×
In 10 -7 / ° C., the thermal expansion coefficient of the hard glass which is the material of the valve 3 is using of about 43~44 × 10 -7 / ℃. As described above, since the thermal expansion coefficients of the hard glass and the molybdenum rods 4 and 5 are similar, the stress generated due to the difference between the thermal expansion and the contraction in the sealing portion 3b is changed to quartz glass (a thermal expansion coefficient of 5.6 × 10 4). −7 / ° C.), and the occurrence of cracks in the sealing portion 3b can be suppressed.
【００１４】また、モリブデン棒４，５は封止部３ｂ内
に封止されているため、封止部形成の際の封着バーナー
の熱によりモリブデン棒４，５の表面に発生する不純物
によって発光部３ａ内が汚染されるのを防止することが
できる。Further, since the molybdenum rods 4 and 5 are sealed in the sealing portion 3b, light is emitted by impurities generated on the surfaces of the molybdenum rods 4 and 5 due to the heat of the sealing burner when the sealing portion is formed. It is possible to prevent the inside of the portion 3a from being contaminated.
【００１５】図２に示すように、モリブデン棒４，５
（図２は一方のモリブデン棒４の構成を示す。なお、他
方のモリブデン棒５の構成も同様である。）は一端部に
プレスによって平板形状の部分４ｂ，５ｂがそれぞれ形
成されている。すなわち、モリブデン棒４，５は円柱形
状の部分４ａ，５ａと平板形状の部分４ｂ，５ｂとが形
成されており、平板形状の部分４ｂ，５ｂにフィラメン
トコイル２の両端部２ａ，２ｂが、かしめ溶接されてい
る。As shown in FIG. 2, the molybdenum rods 4, 5
(FIG. 2 shows the configuration of one molybdenum rod 4. The configuration of the other molybdenum rod 5 is the same.) Flat portions 4b and 5b are formed at one end by pressing. That is, the molybdenum rods 4 and 5 are formed with cylindrical portions 4a and 5a and plate-shaped portions 4b and 5b, and the plate-shaped portions 4b and 5b are provided with the both ends 2a and 2b of the filament coil 2 and swaged. Welded.
【００１６】モリブデン棒４，５の一部に平板形状の部
分４ｂ，５ｂを設けることにより、モリブデン棒４，５
に、従来からバルブの封止に用いられているモリブデン
箔と同様な、リーク発生の減少および熱膨張係数の差に
よるクラック発生の抑制を行うという機能を持たせるこ
とができる。The molybdenum rods 4, 5 are provided with flat plate-shaped parts 4b, 5b on a part thereof.
In addition, a function of reducing the occurrence of leaks and suppressing the occurrence of cracks due to the difference in thermal expansion coefficient can be provided similarly to molybdenum foil conventionally used for sealing a valve.
【００１７】なお、図１中、モリブデン棒４，５の平板
形状の部分４ｂ，５ｂ（なお、この平板形状の部分４
ｂ，５ｂの厚さは０．２ｍｍである）に接続されたフィ
ラメントコイル２の端部の長さ（図１中、記号Ｂで示
す）は２．５ｍｍであり、同じくモリブデン棒４，５の
円柱形状の部分４ａ，５ａの直径は０．３５ｍｍで、長
さ（図１中、記号Ｄで示す）は２．０ｍｍである。ま
た、モリブデン棒４，５の平板形状の部分４ｂ，５ｂに
接続されたフィラメントコイル２の両端部２ａ，２ｂの
端面からモリブデン棒４，５の円柱形状の部分４ａ，５
ａまでの長さ（図１中、記号Ｃで示す）は０．５ｍｍで
あり、さらにこの記号Ｃの部分は平板形状から円柱形状
に形状が変化する箇所であるため図２に示すように傾斜
面を有する傾斜部９となっている。In FIG. 1, the flat portions 4b and 5b of the molybdenum rods 4 and 5 (note that the flat portions 4b and 5b
The length of the end of the filament coil 2 (indicated by the symbol B in FIG. 1) connected to the molybdenum rods 4 and 5 is 2.5 mm. The diameter of the cylindrical portions 4a and 5a is 0.35 mm, and the length (indicated by the symbol D in FIG. 1) is 2.0 mm. The cylindrical portions 4a, 5 of the molybdenum rods 4, 5 are connected to the end surfaces of both ends 2a, 2b of the filament coil 2 connected to the plate-shaped portions 4b, 5b of the molybdenum rods 4, 5, respectively.
The length up to a (indicated by a symbol C in FIG. 1) is 0.5 mm, and the portion of the symbol C is a portion where the shape changes from a flat plate shape to a columnar shape, so that it is inclined as shown in FIG. The inclined portion 9 has a surface.
【００１８】本発明によれば、モリブデン棒４，５に設
けられた傾斜部９によって、電球が早期にリークを起こ
してしまうことを防止することができ、長寿命とするこ
とができる。すなわち、一般に、封止部と、この封止部
に封止されたフィラメントコイルを支持するタングステ
ン線とモリブデン箔等の封止物との境界には空隙が形成
されるため、ランプの使用にともなって、空隙が広がっ
てゆき最終的には発光部内と外気とがこの空隙を通じて
連通してしまい早期にリークが発生する。本発明によれ
ば、上述した傾斜部９によって、封止部３ｂとフィラメ
ントコイル２の両端部２ａ，２ｂやモリブデン棒４，５
等の封止物との境界に形成される空隙１０がランプの使
用にともなって広がるのを塞き止めることができるの
で、外気と連通して早期にリークが発生するのを防止す
ることができる。According to the present invention, the inclined portions 9 provided on the molybdenum rods 4 and 5 can prevent the bulb from leaking at an early stage, and can have a long life. That is, since a gap is generally formed at the boundary between the sealing portion and the tungsten wire supporting the filament coil sealed by the sealing portion and the sealing material such as molybdenum foil, the use of the lamp is also accompanied. As a result, the gap widens, and finally, the inside of the light emitting portion and the outside air communicate with each other through this gap, and a leak occurs early. According to the present invention, the sealing portion 3b and both ends 2a and 2b of the filament coil 2 and the molybdenum rods 4 and 5 are formed by the inclined portion 9 described above.
Can prevent the gap 10 formed at the boundary with the sealing material from expanding with the use of the lamp, so that the leak can be prevented from occurring early by communicating with the outside air. .
【００１９】また、モリブデン棒４，５に平板形状の部
分４ｂ，５ｂを有しているので、フィラメントコイル２
の両端部２ａ，２ｂと平板形状の部分４ｂ，５ｂとの接
続時の位置決めがしやすくなるとともに、フィラメント
コイル２とモリブデン棒４，５との接触面積が増大し、
導通と溶接強度を向上することができる。さらに、封止
部３ｂにおいて封止の際、ガラスとモリブデン棒４，５
との間に空隙１０が生じにくくなるため気密性が向上
し、スローリーク等の発生が減少する。Since the molybdenum rods 4 and 5 have flat portions 4b and 5b, the filament coil 2
And the contact area between the filament coil 2 and the molybdenum rods 4 and 5 is increased, as well as the positioning at the time of connection between the both end portions 2a and 2b and the plate-shaped portions 4b and 5b is facilitated.
Conductivity and welding strength can be improved. Further, at the time of sealing in the sealing portion 3b, glass and molybdenum rods 4, 5
The airtightness is improved because the air gap 10 is hardly generated between the airtightness and the occurrence of a slow leak or the like is reduced.
【００２０】また、図１に示す本実施形態の電球におい
て、発光部３ａと封止部３ｂとの境からモリブデン棒
４，５の先端との間の距離（図１中、記号Ａで示す）は
０．７ｍｍとした。この記号Ａで示す距離は０．５ｍｍ
以上１．０ｍｍ以下の範囲で選択することが好ましい。
すなわち、この記号Ａで示す距離が０．５ｍｍ未満であ
ると、記号Ａで示す範囲に存在するフィラメントコイル
２の端部の長さが０．５ｍｍ未満となるため封止部形成
の際の封着バーナーの熱によって、モリブデン棒４，５
の表面に発生する不純物によって発光部３ａ内に汚染が
生じることとなり、一方、記号Ａで示す距離が１．０ｍ
ｍ以上であると、封止部形成の際の、記号Ａの範囲に存
在するフィラメントコイル２の端部の熱によって封止部
分にクラックが生じるためである。Further, in the light bulb of the present embodiment shown in FIG. 1, the distance between the boundary between the light emitting portion 3a and the sealing portion 3b and the tip of the molybdenum rods 4, 5 (indicated by the symbol A in FIG. 1). Was 0.7 mm. The distance indicated by the symbol A is 0.5 mm
It is preferable to select within the range of not less than 1.0 mm.
That is, when the distance indicated by the symbol A is less than 0.5 mm, the length of the end of the filament coil 2 existing in the range indicated by the symbol A is less than 0.5 mm, so that the sealing at the time of forming the sealing portion is performed. Molybdenum rods 4,5
Will cause contamination in the light emitting portion 3a due to impurities generated on the surface of the light emitting element.
This is because, when it is not less than m, cracks occur in the sealing portion due to the heat of the ends of the filament coil 2 existing in the range of the symbol A when forming the sealing portion.
【００２１】また、モリブデン棒４，５の円柱形状の部
分４ａ，５ａの長さは、この円柱形状の部分４ａ，５ａ
の端部と外部リード線６，７との溶接箇所と、フィラメ
ントコイル２の端部２ａ，２ｂと平板形状の部分４ｂ，
５ｂとの接続箇所とを離すため０．５ｍｍ以上にするこ
とが好ましい。これは、接続箇所が０．５ｍｍ未満であ
るとプレスによって平板形状の部分４ｂ，５ｂを形成す
る際、外部リード線６，７とモリブデン棒４，５の接続
部分が破損または強度が劣化するため、導通不良となる
という不都合が生じるためである。The length of the cylindrical portions 4a and 5a of the molybdenum rods 4 and 5 is the same as that of the cylindrical portions 4a and 5a.
, The ends 2a and 2b of the filament coil 2 and the flat portions 4b,
It is preferable that the thickness be 0.5 mm or more in order to separate the connection point with the connection portion 5b. This is because if the connecting portion is less than 0.5 mm, the connecting portions between the external lead wires 6, 7 and the molybdenum rods 4, 5 are damaged or the strength is deteriorated when the flat portions 4b, 5b are formed by pressing. This is because there is a disadvantage that conduction failure occurs.
【００２２】なお、本実施形態では、フィラメントコイ
ル２として、このフィラメントコイル２の両端部２ａ，
２ｂが長く延びた一体物を用いたが、フィラメントコイ
ルの両端部が短いものを用いてもよく、この場合、この
フィラメントコイルの両端部に例えばタングステンから
なる導入線を接続し、この導入線の端部を封止部内のモ
リブデン棒に接続した構成としても同様の効果が得られ
る。In this embodiment, both ends 2a of the filament coil 2 are used as the filament coil 2.
2b is used as a long one, but a filament coil having short ends may be used. In this case, an introduction wire made of, for example, tungsten is connected to both ends of the filament coil. The same effect can be obtained even when the end is connected to the molybdenum rod in the sealing portion.
【００２３】このように、本発明にかかる電球は、バル
ブ３内部にはモリブデン棒４，５は露出していないの
で、酸化モリブデンなどの不純物がバルブ３内部に生成
されることを抑制でき、その結果、短寿命や早期の効率
低下等の特性劣化の発生を防止することができる。ま
た、封止部３ｂを封止加工をする際に加わるピンチャ圧
によって、突き合わせ溶接の箇所が破損したり、従来の
モリブデン箔を用いた電球と異なり、モリブデン箔が破
れ導通不良となったり、モリブデン箔の剛性があまり無
いために封止加工におけるフィラメントコイルの位置が
不安定で光中心等の精度が低下したりするといった問題
を確実に防止できる。また、モリブデン棒４，５に平板
形状の部分４ｂ，５ｂを備えているので、フィラメント
コイル２とモリブデン棒４，５と外部リード線６，７か
らなるアセンブリの形成が容易にかつ確実に行えるとと
もに、フィラメントコイル２とモリブデン棒４，５との
接触面積が増大し溶接強度の向上と良好な導通状態を確
保することができる。また、封止部３ｂにおける硬質ガ
ラスとモリブデン棒４，５との封着状態が向上し気密性
を増大させることができる。また、封止部３ｂと封止物
との境界に形成される空隙１０がランプの使用にともな
って広がるのを塞き止めることができるので、早期にリ
ークが発生するのを防止できるという優れた効果を有す
るものである。As described above, in the electric bulb according to the present invention, since the molybdenum rods 4 and 5 are not exposed inside the bulb 3, generation of impurities such as molybdenum oxide inside the bulb 3 can be suppressed. As a result, it is possible to prevent the occurrence of characteristic deterioration such as a short life and an early decrease in efficiency. In addition, due to the pincher pressure applied when the sealing portion 3b is sealed, the butt-welded portion is damaged, and unlike a conventional light bulb using molybdenum foil, the molybdenum foil is broken and conduction failure occurs, Since the rigidity of the foil is not so high, the problem that the position of the filament coil in the sealing process is unstable and the accuracy of the optical center or the like is reduced can be reliably prevented. Further, since the molybdenum rods 4 and 5 are provided with the flat portions 4b and 5b, an assembly including the filament coil 2, the molybdenum rods 4 and 5 and the external lead wires 6 and 7 can be easily and reliably formed. As a result, the contact area between the filament coil 2 and the molybdenum rods 4, 5 is increased, so that the welding strength can be improved and a good conduction state can be secured. In addition, the sealing state between the hard glass and the molybdenum rods 4, 5 in the sealing portion 3b is improved, and the airtightness can be increased. Further, since the gap 10 formed at the boundary between the sealing portion 3b and the sealing material can be prevented from expanding with the use of the lamp, an excellent leak can be prevented from occurring at an early stage. It has an effect.
【００２４】[0024]
【発明の効果】以上説明したように、本発明の電球は、
封止部を形成する際に加わるピンチャ圧によって、タン
グステン棒または導入線とモリブデン棒との接合部が破
損するのを防止でき、このため、導通不良となることを
防止することができる。また、小型で低ワットの電球に
おいて、線径の細いタングステン棒または導入線とモリ
ブデン棒との接続を容易にしかも短時間で行うことがで
き、さらにタングステン棒または導入線とモリブデン棒
との溶接強度を充分に確保することができる。また、封
止部における硬質ガラスとモリブデン棒との封着状態を
向上させることができ、気密性を増大させることができ
る。また、封止部内のモリブデン棒の平板形状の部分の
周囲において、封止部と封止物との境界に形成される空
隙がランプの使用にともなって広がるのを塞き止めるこ
とができるので、早期にリークが発生するのを防止する
ことができる。As described above, the light bulb of the present invention has the following features.
It is possible to prevent the junction between the tungsten rod or the lead-in wire and the molybdenum rod from being damaged by the pincher pressure applied when forming the sealing portion, thereby preventing the occurrence of poor conduction. In addition, in a small, low-wattage light bulb, the connection between a tungsten rod or a lead wire having a small diameter and the molybdenum rod can be easily and quickly performed, and the welding strength between the tungsten rod or the lead wire and the molybdenum rod can be improved. Can be sufficiently secured. Further, the sealing state between the hard glass and the molybdenum rod in the sealing portion can be improved, and the airtightness can be increased. In addition, around the flat portion of the molybdenum rod in the sealing portion, the gap formed at the boundary between the sealing portion and the sealed object can be prevented from expanding with the use of the lamp, It is possible to prevent an early leak from occurring.
【図１】本発明の一実施形態である電球の正面図FIG. 1 is a front view of a light bulb according to an embodiment of the present invention.
【図２】同じく封止部の一部切欠拡大斜視図FIG. 2 is a partially cut-away enlarged perspective view of the sealing portion.
【図３】従来の小形電球を示す正面図FIG. 3 is a front view showing a conventional small light bulb.
１ 電球 ２ フィラメントコイル ３ バルブ ４，５ モリブデン棒 ４ａ，５ａ 円柱形状の部分 ４ｂ，５ｂ 平板形状の部分 ６，７ 外部リード線 ８ 接続部 ９ 傾斜部 DESCRIPTION OF SYMBOLS 1 Bulb 2 Filament coil 3 Bulb 4, 5 Molybdenum rod 4a, 5a Column-shaped part 4b, 5b Plate-shaped part 6, 7 External lead wire 8 Connection part 9 Inclined part
Claims (2)
部と、前記発光部に連設された封止部とを有する硬質ガ
ラスからなるバルブを備え、前記フィラメントコイルの
端部または前記フィラメントコイルに接続された導入線
の端部にモリブデン棒の一端部が接続されているととも
に、前記モリブデン棒の他端部に外部リード線が接続さ
れており、前記モリブデン棒および、前記フィラメント
コイルの端部または前記導入線と前記モリブデン棒との
接続部分が封止部内に設けられ、かつ前記フィラメント
コイルの端部または前記導入線と前記モリブデン棒との
接続部分において、前記モリブデン棒が平板形状を有し
ていることを特徴とする電球。1. A bulb made of hard glass having a light emitting portion having a filament coil therein and a sealing portion connected to the light emitting portion, and connected to an end of the filament coil or the filament coil. One end of a molybdenum rod is connected to the end of the introduction wire, and an external lead wire is connected to the other end of the molybdenum rod. The molybdenum rod and the end of the filament coil or the introduction A connecting portion between the wire and the molybdenum bar is provided in the sealing portion, and the molybdenum bar has a flat plate shape at an end portion of the filament coil or a connecting portion between the introduction wire and the molybdenum bar. A light bulb characterized by the following.
で、他端部は円柱形状であり、前記平板形状の部分と前
記円柱形状の部分との間に傾斜部を有することを特徴と
する請求項１記載の電球。2. The molybdenum rod has one end portion having a flat plate shape and the other end portion having a columnar shape, and having a slanted portion between the flat plate portion and the columnar portion. The light bulb according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25115199A JP4273589B2 (en) | 1999-09-06 | 1999-09-06 | light bulb |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25115199A JP4273589B2 (en) | 1999-09-06 | 1999-09-06 | light bulb |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001076686A true JP2001076686A (en) | 2001-03-23 |
| JP4273589B2 JP4273589B2 (en) | 2009-06-03 |
Family
ID=17218446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25115199A Expired - Lifetime JP4273589B2 (en) | 1999-09-06 | 1999-09-06 | light bulb |
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| Country | Link |
|---|---|
| JP (1) | JP4273589B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011508404A (en) * | 2007-12-27 | 2011-03-10 | クムホ エレクトリック インコーポレイテッド | Electrode for hot cathode fluorescent lamp |
-
1999
- 1999-09-06 JP JP25115199A patent/JP4273589B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011508404A (en) * | 2007-12-27 | 2011-03-10 | クムホ エレクトリック インコーポレイテッド | Electrode for hot cathode fluorescent lamp |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4273589B2 (en) | 2009-06-03 |
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