JPS6110830A - Manufacture of low-pressure discharge lamp - Google Patents

Manufacture of low-pressure discharge lamp

Info

Publication number
JPS6110830A
JPS6110830A JP13091984A JP13091984A JPS6110830A JP S6110830 A JPS6110830 A JP S6110830A JP 13091984 A JP13091984 A JP 13091984A JP 13091984 A JP13091984 A JP 13091984A JP S6110830 A JPS6110830 A JP S6110830A
Authority
JP
Japan
Prior art keywords
glass
end stem
discharge lamp
coefficient
thermal expansion
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
JP13091984A
Other languages
Japanese (ja)
Other versions
JPH0471291B2 (en
Inventor
Yasuo Onishi
大西 安夫
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.)
Ushio Denki KK
Ushio Inc
Original Assignee
Ushio Denki KK
Ushio Inc
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 Ushio Denki KK, Ushio Inc filed Critical Ushio Denki KK
Priority to JP13091984A priority Critical patent/JPS6110830A/en
Publication of JPS6110830A publication Critical patent/JPS6110830A/en
Publication of JPH0471291B2 publication Critical patent/JPH0471291B2/ja
Granted legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/24Manufacture or joining of vessels, leading-in conductors or bases
    • H01J9/32Sealing leading-in conductors
    • H01J9/323Sealing leading-in conductors into a discharge lamp or a gas-filled discharge device

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)

Abstract

PURPOSE:To perform the formation of an end stem in an accurate manner in a simple method, by setting a lead bar and a glass material to a press forming device, while applying pressure to the glass material with heating. CONSTITUTION:Each of lead bars 61A and 61B is held between pressing parts, namely, between an upper pressing part 77 and a lower pressing part 71 of a press forming device 7, while a glass material 8 is set up therein, and both these pressing parts 77 and 71 are made to move forward so as to make them come closer with each other along a direction toward these lead bars 61A and 61B. Therefore, a glass plate part 62 moded in plate form and an end stem 6 having a lead bar to be extended as airthightly piercing this plate part 62 both are formed up. With this constitution, formation of the end stem is performable so accurately in a very simple method.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は水銀灯などの低圧放電灯特に放電電流がIA以
下で点灯される低圧放電灯の製造方法に関するものであ
る。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing a low-pressure discharge lamp such as a mercury lamp, particularly a low-pressure discharge lamp that is operated at a discharge current of IA or less.

〔従来技術〕[Prior art]

放電灯例えば水銀灯は、一般にこれにより放射される紫
外i?j利用する分野、例えば元化学産業分野、半導体
製造分野、その他の分野で広く用いられている。
Discharge lamps, such as mercury lamps, generally emit ultraviolet i? It is widely used in fields such as the former chemical industry, semiconductor manufacturing, and other fields.

従来の水銀灯の一例にKいては第2図に示すように、石
英ガラス管lの端部11に気密に接続された端部ステム
2は1例えばタングステン製のり一ド棒21A、21B
と、このリード#21A、21Bの各中央部が埋設固定
されるよう気密に溶着された柱状の到着ガラス部22と
、この封着ガラス部22に順次気密に溶着して段継ぎさ
れた円管状の第1のガラス部23、円管状の第2のガラ
ス部24、円管状の第3のガラス部25、円管の外端が
鍔状に拡開された第4のガラス部26とに工す構成され
、この第4のガラス部26の鍔状の端部外縁全石英ガラ
ス管lの端部11に気@に溶着することにより端部ステ
ム2が石英ガラス管lに接続されている。3A、3Bは
それぞれリード棒21A、21Bの一端に溶接された内
部リードであり、この内部リード3A、3Bの先端部間
には電子放射用のフィラメント4が固設されている。5
A、5Bはそれぞれリード棒21A、21Bの他端に溶
接された外部リードである。
In an example of a conventional mercury lamp, as shown in FIG. 2, an end stem 2 airtightly connected to an end 11 of a quartz glass tube 1 includes glue rods 21A and 21B made of tungsten, for example.
A column-shaped arrival glass part 22 is airtightly welded so that the central parts of the leads #21A and 21B are buried and fixed, and a circular tubular glass part 22 is successively hermetically welded and stepped to this sealing glass part 22. The first glass part 23, the second glass part 24 in the shape of a cylinder, the third glass part 25 in the shape of a cylinder, and the fourth glass part 26 in which the outer end of the cylinder is expanded into a brim shape are machined. The end stem 2 is connected to the quartz glass tube 1 by welding the outer edge of the brim-shaped end of the fourth glass portion 26 to the end 11 of the all-silica glass tube 1. Internal leads 3A and 3B are welded to one end of the lead rods 21A and 21B, respectively, and a filament 4 for electron emission is fixed between the tips of the internal leads 3A and 3B. 5
A and 5B are external leads welded to the other ends of the lead rods 21A and 21B, respectively.

前記到着ガラス部22は、リード棒21 A z 21
 Bの熱膨張率にほぼ一致したガラス材料により形成さ
れ、第1のガラス部23、第2のガラス部24、第3の
ガラス部25、第4のガラス部26は、各々の熱膨張率
が順次石英ガラスの熱膨張率に近(なるよう各々の材質
が選択される。
The arrival glass portion 22 includes a lead rod 21 A z 21
The first glass part 23, the second glass part 24, the third glass part 25, and the fourth glass part 26 are made of a glass material whose coefficient of thermal expansion almost matches the coefficient of thermal expansion of B. Each material is selected in order to have a coefficient of thermal expansion close to that of quartz glass.

このように端部ステム2に8いてガラス部?多段に亘っ
て段継ぎするのは、互に接続された材質間の熱膨張率の
急激な変化全回避するためであり、このように熱膨張率
の変化を緩やかなものとすることにより、点灯時の熱応
力に起因するクランクの発生が防止される。
Like this, there is 8 on the end stem 2 and the glass part? The purpose of connecting multiple stages is to avoid sudden changes in the coefficient of thermal expansion between the interconnected materials. By making the change in the coefficient of thermal expansion gradual in this way, it is possible to This prevents the occurrence of cranks caused by thermal stress.

しかしながら、このような構成の端部ステム2の製造に
おいては、第1のガラス部23から第4のガラス部26
に至る1で数度に亘る接続工8を必要とし、しかもこの
ような段継ぎは機械的に行なうことが困難であることか
ら、通常は手作業によって行なわれて?り、このため接
続工程にどいて相当に熟#!された技能【必要とし、結
局、放電灯の製造に相当の手間金製し、製造コストが高
(なる問題点がある。そのうえ、段継ぎ構造の端部ステ
ム?用いる場合に?い又に1石英ガラス管lの端面から
石英ガラス管1内に突出する部分の長さしが不可避的に
大きくなるため、放電灯全体の長さを小さくして小型化
7図ることに限界がるる問題点かめる。
However, in manufacturing the end stem 2 having such a configuration, the first glass part 23 to the fourth glass part 26
1, which requires several joints 8, and it is difficult to perform such step joints mechanically, so they are usually done manually. Therefore, it is quite ripe for the connection process! In addition, when using an end stem with a step-jointed structure, there is a problem that it requires a considerable amount of time and effort to manufacture the discharge lamp, and the manufacturing cost is high. Since the length of the part protruding from the end face of the quartz glass tube 1 into the quartz glass tube 1 inevitably becomes large, there is a problem that there is a limit to miniaturization by reducing the length of the entire discharge lamp. .

特に、放電電流が1AJJ下で点灯される低圧放電灯に
?いては、消費電力が小さいという特長を府しているが
、端部ステムを上記のような方法にエフ製造する場合に
は、上述の問題点が著しく大きなものとなり、結局製造
コストが著しく高くなり、しかも消費電力が小さい割に
十分な小型化が困難である。
Especially for low-pressure discharge lamps that are lit with a discharge current of 1AJJ or less? However, when the end stem is manufactured by the method described above, the above-mentioned problems become extremely large, and the manufacturing cost becomes extremely high. Moreover, it is difficult to sufficiently reduce the size of the device despite its low power consumption.

〔発明の目的〕[Purpose of the invention]

本発明a、以上の如き事・盾に基いてなされたものであ
って、その目的は、製造が簡単であって製造コストの低
減化を達成することができ、しかも小型化?達成するこ
とができる新規な低圧放電灯の裂造方法會提供すること
にある。
The present invention (a) has been made based on the above-mentioned considerations, and its purpose is to simplify manufacturing, reduce manufacturing costs, and downsize. The object of the present invention is to provide a new method for fabricating a low-pressure discharge lamp that can be achieved.

〔発明の構成〕[Structure of the invention]

以上の目的は、放電電流がIA以−トで点灯される低圧
放電灯の製造方法でろつ℃、リード4It保持し、当該
リード棒の方向に沿って互に接近するプレス成形具の押
圧部間に配置されたガラス材料?加熱しながら前記プレ
ス成形具により加圧1−ることにより、板状に成形きれ
たガラス板部及びこのガラス板部ン気密に貫通して伸び
るリード棒【有する端部ステム全形成し、この端部ステ
ムに2けるガラス板部を石英ガラス管の端部に気密に溶
着して当該端部ステム紫石英ガラス管に、接続する工程
?含み、前記端部ステムに8けるガラス板部はその熱膨
張率が石英ガラスの熱膨張率と前記リード棒の熱膨張率
との中間の値であることケ特徴とする低圧放電灯の製造
方法によって達成される。
The above purpose is to provide a method for manufacturing a low-pressure discharge lamp that is lit with a discharge current of IA or higher. glass material placed in? By applying pressure with the press molding tool while heating, a glass plate portion that has been completely formed into a plate shape and an end stem having a lead rod that extends through the glass plate portion in an airtight manner are completely formed. The process of airtightly welding the two glass plates on the stem to the end of the quartz glass tube and connecting them to the end stem purple quartz glass tube. A method for manufacturing a low-pressure discharge lamp, wherein the glass plate portion of the end stem has a coefficient of thermal expansion that is intermediate between a coefficient of thermal expansion of quartz glass and a coefficient of thermal expansion of the lead rod. achieved by.

以下図面を参照しながら不発明方法ケ詳細に説明する。The non-inventive method will be explained in detail below with reference to the drawings.

本発明の一実施例においては、第1図に示′1″ように
、例えば外径が約0.5〜2.0mのタングステン製の
リード棒61A、61Hの各々ケ、プノス成形具7の下
部押圧部71に設けた保持孔72A、72H内に垂立ぜ
しめしかもほぼその中火から上方部分が露出する状態で
保持せしめる。
In one embodiment of the present invention, as shown in FIG. It is held vertically in the holding holes 72A, 72H provided in the lower pressing part 71, and is held in such a state that the upper part thereof is almost exposed from the medium heat.

前記下部11II圧部71の上部に設けた、内径が後述
する石英ガラス管9の管径にi4@する円筒形のガラス
材料受容部73内に、石英ガラスの熱膨張率(約5 X
 10 ’〜6X10−7)と前記リード棒61A、6
1Bの熱膨張率(約40 X 10−7)との中間の熱
膨張率紮肩するガラス材料8例えばGE社製ガラ7、扁
1(熱膨張率:約13X10−7)勿収谷する。
The thermal expansion coefficient of quartz glass (approximately 5
10'~6X10-7) and the lead rods 61A, 6
1B (about 40.times.10.sup.-7) and a glass material 8 having a thermal expansion coefficient intermediate to that of 1B (about 40.times.10@-7), for example, GE Glass 7, Flat 1 (thermal expansion coefficient: about 13.times.10@-7).

そして、プレス成形具7の外匣74の外周に巻回して設
けた高周波加熱コイル75によりガラス材料8を高周波
加熱して溶融せしめると共に外匣74の下方のガス導入
076から不活性ガス奮外匣74内に光横しながら、上
部抑圧部77の受容孔78A、78B内にそれぞれリー
ド棒61A、61Bのj!(支)部分が受答されながら
下部押圧部71に接近するよう上部押圧部77に下方に
移動せしめ、これら上部押圧部77と下部押圧部71と
の間で溶融状態のガラス材料8會加圧しその後冷却する
ことにより、第3図に示すように、円形板状に成形され
たガラス板部62と、このガラス板部62に気密に貫通
して伸びるリード棒61A、61Bとに!する端部ステ
ム6會形成する。
Then, the glass material 8 is melted by high-frequency heating using a high-frequency heating coil 75 wound around the outer periphery of the outer casing 74 of the press molding tool 7, and an inert gas is introduced into the outer casing from the gas introduction 076 below the outer casing 74. 74, the lead rods 61A and 61B are inserted into the receiving holes 78A and 78B of the upper suppressing portion 77, respectively. (support) part is moved downward so as to approach the lower pressing part 71, and between the upper pressing part 77 and the lower pressing part 71, 8 parts of the glass material in the molten state are pressed. After that, by cooling, as shown in FIG. 3, a glass plate portion 62 formed into a circular plate shape and lead rods 61A and 61B that extend through the glass plate portion 62 in an airtight manner are formed! 6 end stems are formed.

この端部ステム6の形成に8いて、上部押圧部77の受
容孔78A、78Bの下端及び下部押圧部71の保持孔
72A、72Bの上端に穴径が若干大きく7Lる拡開部
79會設けて8くことによ#)、第3図に示したように
、ガラス板部62に2けるリード棒61A、61Bとの
浴着部分が若干膨出した形状となり、ガラス板部62と
リード棒61A、61Bとの接触面積が増大して溶着強
度が大きく TAる。
In forming the end stem 6, expanded portions 79 with slightly larger hole diameters 7L are provided at the lower ends of the receiving holes 78A, 78B of the upper pressing part 77 and at the upper ends of the holding holes 72A, 72B of the lower pressing part 71. 8), as shown in FIG. 3, the part of the glass plate part 62 that connects the two lead rods 61A and 61B has a slightly bulged shape, and the glass plate part 62 and the lead rods have a slightly bulged shape. The contact area with 61A and 61B increases and the welding strength increases.

前記端部ステム6に8い’CH1例えばニッケル製の内
部リード53A、63B′ft:それぞれリード棒61
A、61Bの一端側に接続すると共に、リード棒61A
、61Bの他端側にはそれぞれ例えばニッケル製の外部
リード64A、64Bk接続する。内部り−+’63A
、6313の先端部間にはフィラメント65(j接続す
る。
The end stem 6 has 8'CH1 internal leads 53A, 63B'ft made of nickel, for example, each with a lead rod 61.
A, connect to one end side of 61B, and connect lead rod 61A
, 61B are connected to external leads 64A, 64Bk made of nickel, respectively. Internal +'63A
, 6313 are connected with a filament 65 (j).

このようにして得られる端部ステム6?、第4図に示す
ように、フィラメント65が石英ガラス管9内に位置さ
れるよう石英ガラス管9の一万の端部91Aに気密に接
続する。即ち端部ステム6のガラス板部62の例えば縁
部621會石英ガラス菅9の〜万の端部91Aの例えば
開口縁部911Aに、加熱しながら気密に溶着する。石
英ガラス管9の他方の端部91Bに?いても既述と同様
にして製造した端部ステム6′?用い、上述と同様にし
て端部ステム6′葡端部91Bに接続し℃、封体10?
形成する。
The end stem 6 thus obtained? , as shown in FIG. 4, the filament 65 is positioned within the quartz glass tube 9 and is hermetically connected to the ten thousand ends 91A of the quartz glass tube 9. That is, the edge 621 of the glass plate portion 62 of the end stem 6 is hermetically welded to, for example, the opening edge 911A of the end 91A of the quartz glass tube 9 while heating. At the other end 91B of the quartz glass tube 9? The end stem 6' manufactured in the same manner as described above? The end stem 6' is connected to the end 91B in the same manner as described above, and the enclosure 10 is heated at 10°C.
Form.

N本10円には、例えば水銀、不活性ガスなどk1人す
る。これらの封入量は、点灯時(温度約40〜60℃)
に?いて封体10内の圧力が約2゜トール以下となるよ
うな童とする。
For example, mercury, inert gas, etc. cost 1 k for 10 yen for N bottles. The amount of these enclosed is when lit (temperature approximately 40-60℃)
To? The pressure within the enclosure 10 is approximately 2° Torr or less.

〔発明の作用効果〕[Function and effect of the invention]

以上の実施例の説明から理解されろよう和本発明方法に
よれば、次のような作用効果が奏されろ。
As can be understood from the above description of the embodiments, the method of the present invention provides the following effects.

(1)  プンス成形具の押圧部間、即ち上部押圧部と
下部押圧部との間に、リード棒を保持すると共にガラス
材料?装置して、白該ガラス材料勿加熱しながら上部押
圧部と下部押圧部と?リード棒の方向IC沿って互に接
近するよう移動せしめて加圧することに、1.す、板状
に成形されたガラス板部とこのガラス板部會気密に貫通
して伸びるリード棒と7石する端部ステムを形成するた
め、換言すればリード棒及びガラス材料?プレス成形具
にセントし、ガラス材Rk加熱しながら加圧するという
極めて簡単な方法でありながら端部ステムの形成を確実
に行なうことができる。
(1) A lead rod is held between the pressing parts of the punch forming tool, that is, between the upper pressing part and the lower pressing part, and a glass material is used. The device uses the white glass material while heating the upper pressing part and the lower pressing part? Moving the lead rods toward each other along the direction IC and applying pressure, 1. In order to form a glass plate portion formed into a plate shape, a reed rod that extends through the glass plate portion in an airtight manner, and a rounded end stem, in other words, the reed rod and the glass material. Although it is an extremely simple method of placing the glass material in a press molding tool and applying pressure while heating the glass material Rk, the end stem can be formed reliably.

しかもプンス成形具という機械的手段にJ−り自動的に
作業7行なうことができるため、作業者に特に熟練され
た技能が要求されず、そのうえ寸法精度の高い規格化さ
れた端部ステムr迅速に形成することができ、この箱果
製造コストの低減化、生産ラインの高速化?容易に達成
することができる。
Moreover, since the work can be carried out automatically using a mechanical means called a Punsu forming tool, no particularly skilled skills are required from the operator, and in addition, the standardized end stem with high dimensional accuracy Can this box be formed to reduce production costs and speed up the production line? can be easily achieved.

(2)そして、■端部ステムにおけるガラス板部の材質
として、その熱膨張率が石英ガラス管とり一ド棒との中
間の値となるガラス材料音用いること、■放t’a流が
IA以下で点灯される低圧放電灯であるため、リード棒
の外径?非常に小さくすることができ、しかも点灯時に
?いては、リード棒、ガラス板部、石英ガラス管の温度
上昇が小ざいこと、の理由から低圧放電灯の点灯時に8
いては、リード棒とガラス板部間及びガラス板部と石英
ガラス管間に発生する熱応力が極めて小さく、このため
、従来の段継ぎ構造のものに比べればリード棒からガラ
ス板部、石英ガラス管に至る萱での熱膨張率の段差が太
き(はなるもののこのことに起因してクラックが発生す
ることがなく、結局温度耐久性が何ら減少することのな
い低圧放電灯”kIJI造することができる。
(2) And, ■ As the material of the glass plate in the end stem, use a glass material whose coefficient of thermal expansion is intermediate between that of the quartz glass tube and the rod, and ■ The radiation flow is IA. Since it is a low-pressure discharge lamp that is lit with the following, the outer diameter of the lead rod? Can it be made very small and yet when lit? In this case, the temperature rise of the lead rod, glass plate, and quartz glass tube is small, so when turning on the low-pressure discharge lamp,
In this case, the thermal stress generated between the lead rod and the glass plate part and between the glass plate part and the quartz glass tube is extremely small. Although there is a large step in the coefficient of thermal expansion at the shank leading to the tube, it does not cause cracks and ultimately does not reduce its temperature durability. be able to.

(3)(−して、端部ステムは半相なガラス板部にリー
ド棒が気密に貫通した形状であり、しかもガラス板部7
召英ガラス管の端部開口を塞ぐよう接続スるので、端部
ステムの石英ガラス管内に突出する長さはガラス板部か
らフィラメントに至る部分までの長さとなって従来の段
継ぎ構造の場合に比して大幅に短くなり、この結果発元
長即″P)1対のフィラメント間の距離?固定したとき
K、放電灯の全長全従来の段継ぎ構造?採用した場合に
比べて相肖に短くすることができ、結局放電灯の小型化
全十分に達成することが可能となる。
(3) (-, the end stem has a shape in which the lead rod passes through the half-phase glass plate part airtightly, and the glass plate part 7
Since the connection is made to close the opening at the end of the quartz glass tube, the length of the end stem protruding into the quartz glass tube is the length from the glass plate to the filament, which is the same as in the case of a conventional stepped joint structure. As a result, the length of the discharge lamp is significantly shorter than that of the conventional step-jointed structure. As a result, it becomes possible to achieve a complete miniaturization of the discharge lamp.

本発明に?いては、以上の実施例に限定されず、種々変
更が可能である。即ち、 (イ)プレス成形具の具体的形状は、製造すべき端部ス
テムの大@さに基いて適宜定めればよい。
To this invention? However, the present invention is not limited to the above embodiments, and various modifications can be made. That is, (a) The specific shape of the press molding tool may be determined as appropriate based on the size of the end stem to be manufactured.

(ロ)プレス成形具にどいて加熱手段は高周波加熱以外
の他の手段音用いてもよい。
(b) As the heating means in the press molding tool, other means than high-frequency heating may be used.

(ハ)端部ステムのガラス板部の熱膨張率は石英ガラス
管の熱膨張率とり−ド棒の熱膨張率との中間の値であれ
ばよ(、この条件?満足するガラス材料t−:IiI冗
選択すればよい。
(c) The coefficient of thermal expansion of the glass plate of the end stem should be an intermediate value between the coefficient of thermal expansion of the quartz glass tube and the coefficient of thermal expansion of the lead rod. :IiI redundancy should be selected.

(ニ)そして本発明は螢元灯會製造する場合にも適用す
ることができ、この場合は石英ガラス管の内面に螢九膜
を形成すればよい。
(d) The present invention can also be applied to the production of fireworks lamps; in this case, a firefly film may be formed on the inner surface of the quartz glass tube.

以上詳細に説明したように、本発明によれば、製造が簡
単であって製造コストの低減化全達成することができ、
しかも小型化耐達成することができる新規な低圧放電灯
の製造方法を提供することができる。
As explained in detail above, according to the present invention, manufacturing is simple and manufacturing costs can be completely reduced.
Furthermore, it is possible to provide a novel method for manufacturing a low-pressure discharge lamp that can achieve downsizing.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の一笑施例の要部?説明するための説明
図、第2図は従来の方法により形成された水銀幻の端部
ステムの一例?示す説明図、第3図は本発明方法2用い
て形成さハた端部ステムの一例?示ず説明図、第4図は
本発明方法音用い℃製造された低圧放電灯の一例の概略
を示″j説明図である。 1・・石英ガラス管   11・・・端部2・・・端部
ステム    21A、21B・・・リード棒22・・
・到着ガラス部 23.24.25.26・・ガラス部 3A、3B・・・内部リード 4・・・フィラメント5
A、5B・・・外部リード 61A、61B・・・リー
ド棒7・・・プレス成形具   71・・・下部押圧部
72A、72B・・・保持孔  9・・・石英ガラス管
73・・受谷部      8・・・ガラス材料74・
・・外匣       75・・・高周波加熱コイル7
6・・・ガス導入口    77・・・上部押圧部78
A 、 78B・・・受容孔  62・・・ガラス板部
6・・・端部ステム    63A、63B・・・内部
リード64A、64B・・・外部リード 65・・・フ
ィラメント91A・・・端部      621・・・
縁部911A・・・開口縁部   91B・・・端部6
′・・・端部ステム    lO・・・封体第1図 第3図
Is Fig. 1 the main part of the laughing embodiment of the present invention? An explanatory drawing for explanation, Fig. 2 is an example of a mercury phantom end stem formed by a conventional method? The explanatory diagram shown in FIG. 3 is an example of an end stem formed using method 2 of the present invention. FIG. 4 is an explanatory diagram schematically showing an example of a low-pressure discharge lamp manufactured using the method of the present invention using sound. 1. Quartz glass tube 11. End portion 2. End stem 21A, 21B... Lead rod 22...
- Arrival glass part 23.24.25.26...Glass part 3A, 3B...Internal lead 4...Filament 5
A, 5B... External lead 61A, 61B... Lead rod 7... Press forming tool 71... Lower pressing part 72A, 72B... Holding hole 9... Quartz glass tube 73... Ukeya Part 8...Glass material 74.
... Outer box 75 ... High frequency heating coil 7
6...Gas inlet 77...Upper pressing part 78
A, 78B...Reception hole 62...Glass plate portion 6...End stem 63A, 63B...Inner lead 64A, 64B...Outer lead 65...Filament 91A...End 621 ...
Edge 911A...Opening edge 91B...End 6
'... End stem lO... Enclosure Figure 1 Figure 3

Claims (1)

【特許請求の範囲】 1)放電電流が1A以下で点灯される低圧放電灯の製造
方法であつて、 リード棒を保持し、当該リード棒の方向に沿つて互に接
近するプレス成形具の押圧部間に配置されたガラス材料
を加熱しながら前記プレス成形具により加圧することに
より、板状に成形されたガラス板部及びこのガラス板部
を気密に貫通して伸びるリード棒を有する端部ステムを
形成し、この端部ステムにおけるガラス板部を石英ガラ
ス管の端部に気密に溶着して当該端部ステムを石英ガラ
ス管に接続する工程を含み、 前記端部ステムにおけるガラス板部はその熱膨張率が石
英ガラスの熱膨張率と前記リード棒の熱膨張率との中間
の値であることを特徴とする低圧放電灯の製造方法。
[Claims] 1) A method for manufacturing a low-pressure discharge lamp that is lit with a discharge current of 1A or less, which comprises holding a lead rod and pressing press molding tools that approach each other along the direction of the lead rod. An end stem having a glass plate portion formed into a plate shape by applying pressure with the press molding tool while heating a glass material disposed between the portions, and a lead rod extending through the glass plate portion in an airtight manner. and connecting the end stem to the quartz glass tube by airtightly welding the glass plate portion of the end stem to the end of the quartz glass tube, the glass plate portion of the end stem being A method for manufacturing a low-pressure discharge lamp, characterized in that the coefficient of thermal expansion is an intermediate value between the coefficient of thermal expansion of quartz glass and the coefficient of thermal expansion of the lead rod.
JP13091984A 1984-06-27 1984-06-27 Manufacture of low-pressure discharge lamp Granted JPS6110830A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13091984A JPS6110830A (en) 1984-06-27 1984-06-27 Manufacture of low-pressure discharge lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13091984A JPS6110830A (en) 1984-06-27 1984-06-27 Manufacture of low-pressure discharge lamp

Publications (2)

Publication Number Publication Date
JPS6110830A true JPS6110830A (en) 1986-01-18
JPH0471291B2 JPH0471291B2 (en) 1992-11-13

Family

ID=15045801

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13091984A Granted JPS6110830A (en) 1984-06-27 1984-06-27 Manufacture of low-pressure discharge lamp

Country Status (1)

Country Link
JP (1) JPS6110830A (en)

Also Published As

Publication number Publication date
JPH0471291B2 (en) 1992-11-13

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