JPS61239540A - Discharge lamp - Google Patents

Abstract

PURPOSE:To obtain a discharge lamp having small shell and small loss of quantity of light due to the shell by projecting the central section of an endboard for sealing the open section of outer tube air-tightly into the outer tube then arranging an electrode and an inner tube on the projected section while providing a sealing section against the outer tube at the flange section of outercircumference. CONSTITUTION:The endboard 19 has the central section projecting into the outer tube 1 to form a projected section 19a while a flange section 19b is provided at the outercircumference to exhibit a cap shape. An electrode 6 and an inner tube 7 and arranged on the top face of the projected section 19a where the flange section 19b and the outer tube 1 are sealed through adhesive 5 such as glass frit while the shell 20 and the outer tube 1 are secured through adhesive 11 above the sealing section. The inner tube 7 for emitting light is projecting from the neck section 2 thereby the light shielding effect through the step section 17 of shell 20 is reduced in spite of the fact that the shell 20 will cover the vicinity of the neck section 2 of the outer tube 1. While since the inside of the projected section 19a of the endboard 19 is utilized for containing a ballast 12, small shell can be employed, resulting in reduction of the quantity of light due to the shell.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は放電路を屈曲させて外管形状を小形にし、白
熱電球に代替可能なようにした蛍光ランプなどの放電灯
に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a discharge lamp, such as a fluorescent lamp, whose discharge path is bent to reduce the size of the outer bulb, so that it can be substituted for an incandescent lamp.

〔従来の技術〕[Conventional technology]

第２図は特開昭５９−ｉ４３２５６号公報などに示され
る従来の放電灯である。図において、１はガラス製の外
管で、開口部３を有する球状に形　　　□成され％２は
そのネック部である。４はセラミツ　　　：り製の端板
で、この端板４の外周端部に外管１の開口端が接着され
外管１円を気密空間としている。　　□５はその封着を
行う無機接着剤である。６は外管　　・１内に突出する
よう端板４上に設けられた２個の電極で、このそれぞれ
の電極６は、ガラス管？Ｕ　　　’字状に屈曲し一端を
端板４上に固着した２個の内　　□管７内に配設されて
いる。この円管７の他端部は　　　・互いに対向した開
口８が形成されており、電極６　　１間に生起される放
電はその開口８を経由して形成される。また１円管７の
内面には蛍光体層９が被着され、この蛍光体層９は主と
して外管１円に放電媒体として希ガスに加えて封入され
ている水銀　　二からの紫外線により可視光を放射する
。FIG. 2 shows a conventional discharge lamp as disclosed in Japanese Patent Application Laid-open No. 59-i43256. In the figure, 1 is an outer tube made of glass, which is shaped like a sphere with an opening 3, and %2 is its neck. Reference numeral 4 denotes an end plate made of ceramic, and the open end of the outer tube 1 is adhered to the outer peripheral end of the end plate 4, making one circle of the outer tube an airtight space. □5 is an inorganic adhesive for sealing. 6 is an outer tube ・Two electrodes are provided on the end plate 4 so as to protrude into the 1, and each electrode 6 is a glass tube? It is arranged in two inner □ tubes 7 which are bent into a U' shape and have one end fixed on the end plate 4. The other end of this circular tube 7 has: - Openings 8 facing each other are formed, and the discharge generated between the electrodes 61 is formed via the openings 8. In addition, a phosphor layer 9 is coated on the inner surface of the circular tube 7, and this phosphor layer 9 is mainly exposed to visible light by ultraviolet rays from mercury, which is sealed in the outer tube as a discharge medium in addition to a rare gas. radiate.

ｔた。１０はプラスチックあるいは金属製のシ　　゛、 エルで、外管１のネック部２を覆って接着剤１に゛。It was. 10 is a plastic or metal shell, Cover the neck part 2 of the outer tube 1 with the adhesive 1.

で固着されている。このシェル１００内部には、：安定
器１２．スタータ１３等の点灯装置１４が収　　：納さ
れ、端部にはＥ型口金１５が取付けられ、口金１５〃）
ら点灯装置１４を経て電極６に至る点灯回路が構成され
ている。It is fixed in place. Inside this shell 100 are: ballast 12. A lighting device 14 such as a starter 13 is housed, and an E-shaped cap 15 is attached to the end.
A lighting circuit is constructed that extends from the electrode 6 through the lighting device 14.

第３図は外管１とシェル１０との接合部分を拡大して示
す図である。図中、１６はシェル１０の内壁に形成され
た嵌合部、１７はこの嵌合部１６に連設した段部で、嵌
合部１６エり１〜３−大きい内径となってオリ、これら
嵌合部１６２段部１７で接着剤受容部１８が形成されて
いる。FIG. 3 is an enlarged view showing the joint portion between the outer tube 1 and the shell 10. In the figure, 16 is a fitting part formed on the inner wall of the shell 10, 17 is a stepped part connected to this fitting part 16, and the fitting part 16 has a larger inner diameter than edges 1-3. An adhesive receiving portion 18 is formed by the step portion 17 of the fitting portion 162 .

このように外管１と端板４との封着部は、ガラスフリッ
トなどの無機接着剤５を使用して加熱封着したものであ
るため、加熱加工による歪が残っている。上記放電灯で
は嵌合部】６が封着部金板っているため、接着剤１１は
封着部に付着せず、従って封着部に力は加わらず亀裂や
剥離は生じない。そしてこの放電灯でＶｓ、接着剤１１
全発泡させる際の圧縮応力に注目したものであるが、−
使用時の外力もまた封着部の破損につながることがあり
、この場合も封着部に大きな外力が加わらない構造が必
要である。このため外管１とシェル１０の固着μ主とし
て封着部より上方の外管１の一部で行うことが必要であ
り、シェル１０は封着部だけでなく外管の一部を覆う形
状となっている。As described above, since the sealed portion between the outer tube 1 and the end plate 4 is heat-sealed using an inorganic adhesive 5 such as glass frit, distortions due to heat processing remain. In the discharge lamp described above, since the fitting part 6 is made of a metal plate as the sealing part, the adhesive 11 does not adhere to the sealing part, so no force is applied to the sealing part and no cracking or peeling occurs. And with this discharge lamp, Vs, adhesive 11
The focus was on the compressive stress during full foaming, but -
External forces during use may also lead to damage to the sealed portion, and in this case as well, a structure is required that prevents large external forces from being applied to the sealed portion. Therefore, it is necessary to fix the outer tube 1 and the shell 10 mainly in a part of the outer tube 1 above the sealing part, and the shell 10 has a shape that covers not only the sealing part but also a part of the outer tube. It has become.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

従来の放電灯は、熱的歪みの残った封着部が破損しない
ようシェル１０と外管Ｉと全固着するためにシェル１０
は外管１の一部（ｆ”覆う形状でなければならず、との
ためシェル１０が大形化して不体裁になると共に、外管
またらの元金一部遮蔽するために光量が減少してしまう
という問題点があった。In a conventional discharge lamp, the shell 10 is completely fixed to the outer bulb I so that the sealed part where thermal distortion remains is not damaged.
The shell 10 must be shaped to cover part (f") of the outer tube 1, which makes the shell 10 large and unsightly, and the amount of light decreases because it shields a part of the base of the outer tube. There was a problem with this.

この発明に」二記のような問題点全解決するためになさ
れたもので、シェルが小形でかつシェルによる光量の損
失の少ない放電灯を得ること全目的とする。This invention has been made in order to solve all of the problems mentioned in 2 above, and the overall purpose is to provide a discharge lamp with a small shell and with less loss of light amount due to the shell.

〔問題点を解決するだめの手段〕[Failure to solve the problem]

この発明に係る放電灯は、外管の開口部全気密に封着す
る端板金、その中央部全外管内に突出させた形状として
この凸部に電極および内管全段け。The discharge lamp according to the present invention includes an end plate metal whose entire opening of the outer bulb is hermetically sealed, and a central portion of the end plate that protrudes into the entire outer bulb, and electrodes and the entire inner tube are mounted on this convex portion.

外周の鍔部に外管との封着部を設けるよう構成したもの
である。The structure is such that a sealing part with the outer tube is provided on the outer periphery of the flange.

〔作　用〕[For production]

この発明の放電灯においてＴａ、、端板の凸部内側に点
灯装置の一部全収納し、かつ電極および内管が封着部エ
リ外管内に突出した位置に設置され、シェルによる元の
遮蔽が減少する。In the discharge lamp of the present invention, a part of the lighting device is entirely housed inside the convex portion of the end plate, and the electrodes and the inner tube are installed at a position protruding into the outer tube from the sealing area, and the original shielding by the shell is removed. decreases.

〔実施例〕〔Example〕

第１図はこの発明の一実施例による放電灯を示す断面図
である。この図において、１９はセラミック製の端板で
、この端板１９は中央部が外管１内に突出して凸部１９
ａが形成されると共に外周に鍔部１９ｋｌ有し、いわゆ
る帽状となっている。FIG. 1 is a sectional view showing a discharge lamp according to an embodiment of the present invention. In this figure, reference numeral 19 denotes an end plate made of ceramic, and the center portion of this end plate 19 protrudes into the outer tube 1 to form a convex portion 19.
a is formed, and a flange 19kl is formed on the outer periphery, forming a so-called cap shape.

また２０は従来のシェル１０に較べて小形化されたシェ
ルである。他の各構成は第２，３図に示す、　　ｍ“′
１″１４５０″′″′−〜“６−ＫＩ＃−Ｎ−！’ｚ付
してその説明を省略する。Further, 20 is a shell that is smaller than the conventional shell 10. Other configurations are shown in Figures 2 and 3.
1″1450″′″′-～“6-KI#-N-! 'Z will be added and the explanation will be omitted.

・□パ：′　　　　　このよう力放電灯に、平坦になっ
た凸部１９・？ 弘゛。・□Pa:' There is a flat convex part 19 in the power discharge lamp like this? Hiro゛.

・′、　　　の頂面に電極６および内管７を設置し、鍔
部１９ｂ□′１　　　と外管１との封着部は従来同様ガ
ラスフリットな°　　　どの接着剤５によって行われる
。またシェル２０と外管１との固着も、従米同様封着部
の上方で接着剤１１により行われる。そして安定器１２
はその一部分が凸部１９ａ内側に収納されてシェル２０
円に配置されている。　　　　　　　　　　　　　　　
　　１かかる構成の放電灯においては、シェル２０が　
　　　゛外管１のネック部２の近傍を覆う形状になって
い　　　　゛あ、ヵ、ヵ、わ、ｆ、ヵ、ヨあ。、７カ８
えッ、゛゛（部２の位置より突出しているため、シェル
２００　　　　己段部１７による光の遮蔽の影響が減少
する。また　　　　”端板１９の凸部１９ａ内側を安定
器１２の収納に利用しているためシェル２０は従来に比
べて小形で済むことになる。The electrode 6 and the inner tube 7 are installed on the top surface of the tube 1, and the sealing portion between the flange 19b'1 and the outer tube 1 is performed using an adhesive 5 such as glass frit, as in the conventional case. Also, the shell 20 and the outer tube 1 are fixed together using the adhesive 11 above the sealing part, as in the conventional case. and stabilizer 12
A part of the shell 20 is stored inside the convex portion 19a.
arranged in a circle.
1 In a discharge lamp having such a configuration, the shell 20 is
It has a shape that covers the vicinity of the neck part 2 of the outer tube 1. ,7ka8
Well, (because it protrudes from the position of part 2, the influence of light shielding by the stepped part 17 of the shell 200 is reduced. Also, the inside of the convex part 19a of the end plate 19 can be used to store the ballast 12. Therefore, the shell 20 can be smaller than the conventional one.

なお、上記実施例ではシェル２００内壁に嵌合部１６全
設けているが、シェル２０が外管１の開目端部金板い、
外管１とシェル２０の一部が固着　　　　、されて外管
１と端板１９との封着部に大きな力が　　　□′へ 加わらない構造であれば他の構成でも良いことは　　　
　、。In the above embodiment, the entire fitting part 16 is provided on the inner wall of the shell 200, but the shell 20 is made of metal plate at the open end of the outer tube 1,
Other configurations may be used as long as a portion of the outer tube 1 and shell 20 are firmly attached and no large force is applied to the sealing portion between the outer tube 1 and the end plate 19.
,.

階 明らかである。また、元の損失は端板１９の凸部　　　
　］；□ １９ａの冒さがシェル２０の段部１７エり高い場合に最
も少なくなる。　　　　　　　　　　　　　　　　■〔
発明の効果〕 以上のようにこの発明の放電灯によれば、外管全気密に
封着する端板な外管内に突出した形状にしたので、凸部
内金点灯装置ａの収納部として利用できるためにシェル
の小形化が図れ、脣たシェルによる光量の損失を減少さ
せることができる等の効果がある。Floor is obvious. In addition, the original loss is caused by the convex portion of the end plate 19.
];□ When the step 17 of the shell 20 is higher, the protrusion of the 19a becomes the least. ■〔
[Effects of the Invention] As described above, according to the discharge lamp of the present invention, since the end plate is shaped to protrude into the outer bulb and is completely airtightly sealed to the outer bulb, the convex inner metal can be used as a housing part for the lighting device a. Therefore, the shell can be made smaller, and the loss of light amount due to the extended shell can be reduced.

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

第１図はこの発明の一実施例による放電灯の要部断面図
、第２図は従来の放電灯を示す斜視図、第３図は従来の
放電灯の要部断面図である。 １・・・外管、３・・・開口部、５．１１・・・接着剤
、６・・・電極、７・・・内管、１４・・・点灯装置、
１９・・・端板、１９ａ・・・凸部、１９ｂ・・・鍔部
、２０・・・シェル。 なン、図中同一符号は同一または相当部分を示す。 シ 代理人　　　　大　　岩　　増　　細 第１図 １：タト管 ３；間口＠昏 ５、ｌＩｔ＃！斉Ｉ（ ６、電極 ７：内管 １４：今丈丁ネｌ醒 Ｉ９：が帛オ反 １９０：凸部 １９ｂ：金若音戸 ２０：７エルFIG. 1 is a sectional view of a main part of a discharge lamp according to an embodiment of the present invention, FIG. 2 is a perspective view of a conventional discharge lamp, and FIG. 3 is a sectional view of a main part of a conventional discharge lamp. DESCRIPTION OF SYMBOLS 1... Outer tube, 3... Opening part, 5.11... Adhesive, 6... Electrode, 7... Inner tube, 14... Lighting device,
19... End plate, 19a... Convex portion, 19b... Flange portion, 20... Shell. The same reference numerals in the figures indicate the same or corresponding parts. Agent Masu Oiwa Figure 1: Tato tube 3; Frontage @ Ko 5, lIt#! Qi I (6, Electrode 7: Inner tube 14: I9: Gap plate 190: Convex part 19b: Kanewaka Ondo 20: 7 El

Claims (1)

【特許請求の範囲】[Claims] 開口部を有する外管と、この開口部を気密に封着する端
板と、この端板に取付けられ外管内空間部に配置される
電極を有し放電路を形成する円管と、前記外管と端板と
の封着部および外管の開口端部を覆い、その内部に前記
内管の点灯装置を収納したシェルとを備えた放電灯にお
いて、前記端板の中央部を外管内に突出させ、この突出
した凸部に内管を取付けると共に、外周の鍔部に外管開
口端を封着したことを特徴とする放電灯。An outer tube having an opening, an end plate that airtightly seals the opening, a circular tube having an electrode attached to the end plate and disposed in the inner space of the outer tube, and forming a discharge path; In a discharge lamp comprising a sealed portion between a tube and an end plate, and a shell that covers an open end of an outer tube and houses a lighting device for the inner tube therein, the central portion of the end plate is inserted into the outer tube. A discharge lamp characterized in that an inner tube is attached to the protruding convex portion, and an open end of the outer tube is sealed to a flange on the outer periphery.