JPS5923448A - Fluorescent lamp - Google Patents

Abstract

PURPOSE:To improve early reduction of the luminous flux as well as the starting performance of a fluorescent lamp, which is constituted by vertically installing a plural number of curved inner tubes so that they work as electric discharge paths, by coating the inner surfaces of the inner tubes with transparent conductive films, then applying a phosphor to the transparent films. CONSTITUTION:A lamp part (A) is constituted of an outer tube 1, U-shaped inner tubes 2, a spacer 3 and a stem 4. A phosphor 5 is applied to the inner surfaces of the inner tubes 2, then sintered. The spacer 3 is provided with inner-tube insertion holes 7a-7f having parts 6 formed by spot facing. A connection hole 8 is provided between the insertion holes 7a and 7b, and a connection groove 9 the lower surface of which is opened is provided between the insertion holes 7d and 7c. Lead wires 11 are airtightly fitted into the stem 4, and electrodes 13 are attached to the ends of the lead wires 11. After assembling the inner tubes 2, the spacer 3 and the stem 4, they are sealed in the outer tube 1 before it is exhausted, and the outer tube 1 is charged with an electric discharge gas. In such a lamp part (A), after the inner surfaces of the inner tubes 2 are coated with transparent conductive films made of indium oxide, a phosphor 5 is applied to the transparent films. As a result, the blackening of the inner surface of the inner tube 2 is suppressed, and early reduction of the luminous flux as well as the starting performance of the lamp can be improved.

Description

【発明の詳細な説明】 本発明は、外管とステムにより形成される放電空間内に
内管を収納し、該内管を放電路とするコンパクトサイズ
の螢光ラングに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a compact fluorescent rung in which an inner tube is housed in a discharge space formed by an outer tube and a stem, and the inner tube serves as a discharge path.

第１図はこの種の螢光ランプを示す斜視図で。FIG. 1 is a perspective view of this type of fluorescent lamp.

ラング部Ａ１点灯装置部Ｂ、ねじ口金部Ｃより成り、第
２図は上記ラング部Ａの分解斜視図である。It consists of a rung part A, a lighting device part B, and a screw cap part C. FIG. 2 is an exploded perspective view of the rung part A.

ラング部Ａは外管１、Ｕ字状内管２、スペーサ８及びス
テム４から成り、内管２の内壁には螢光体５が塗布され
焼成されており、スペーサ８には内管２の両端を位置決
め固定するための座ぐり部６を有する６つの内管挿入孔
７ａ〜７ｆが設けられている。そして、６つの内管挿入
孔７ａ〜７ｆのうち互いに隣り合う挿入孔７ａ　、　７
ｂは、上下面が開口した連絡孔８で、ｔた他方の隣り合
う挿入孔７ｄ。The rung part A consists of an outer tube 1, a U-shaped inner tube 2, a spacer 8, and a stem 4. The inner wall of the inner tube 2 is coated with a phosphor 5 and fired. Six inner tube insertion holes 7a to 7f having counterbore portions 6 for positioning and fixing both ends are provided. Among the six inner tube insertion holes 7a to 7f, the insertion holes 7a and 7 are adjacent to each other.
b is a communication hole 8 whose upper and lower surfaces are open; and the other adjacent insertion hole 7d.

７Ｃは下面のみが開口した連絡溝９でそれぞれ連絡され
ている。上記連絡孔８を設けるのは、外管１とステム４
とで形成される空間と、上記各内管２の放電空間を共通
にするためである。１０１ｄステム４上にスペーサ８を
固定するだめのスペーサ固定用封入線挿通溝である。ス
テム４には４本のリード線１１及び４木のスペーサ固定
用封入線校が封入されており、上記リード線１１の先端
には電極１３が取付けられている。なお、１４け排気管
である。7C are connected to each other by a communication groove 9 which is open only on the lower surface. The communication hole 8 is provided between the outer tube 1 and the stem 4.
This is to make the space formed by the above-mentioned inner tubes 2 and the discharge space of each inner tube 2 common. 101d This is a spacer fixing encapsulating wire insertion groove for fixing the spacer 8 on the stem 4. Four lead wires 11 and four spacer fixing wires are enclosed in the stem 4, and an electrode 13 is attached to the tip of the lead wire 11. Note that this is a 14-piece exhaust pipe.

次に組立について述べる。まず、各内管２の両開口端を
内管挿入孔７ａ〜７ｆの座ぐり部６に嵌め込んだ後、加
熱硬化型の耐熱性無機接着剤又はガラスフリットの如き
接着剤にてスペーサ８に気密的に固定する。この気密的
固定は、内管２外壁とスペーサ８の座ぐり部６との間に
生じるギャップを小さくしてやれば必らずしも気密性を
必要とするものではない。次に、このようにして内管２
と一体化Ｌ［スペーサ８をステム４に、該ステム４に設
けた両’Ｆ［ＦＭ１３．１３及びスペーサ固定用封入線
νが、スペーサ８に設けた内管挿入孔７ｃ　、　７ｆ及
び封入線挿通溝１ｏにそれぞれ対応するように配置スル
。スペーサ８とステム４との固定は、スペーサ固定用封
入線校をスペーサ８の上面内方向に折り曲げることによ
り行なう。この工程により電樺１１と各内管２が直列接
続され一つの放電路を形成するのである。このスペーサ
８のステム４への固定も、ギャップを小さくしてやれば
必ずしも気密性を必要とするものではない。そして、外
管１の開口端とステム４の外周を気密封着した後、排気
管１４より通常の電極物質活性化処理、排気、放電用ガ
ス封入を行なうことによりランプ部Ａ＃−ｉ完成する。Next, let's talk about assembly. First, both open ends of each inner tube 2 are fitted into the counterbore portions 6 of the inner tube insertion holes 7a to 7f, and then the spacers 8 are attached with an adhesive such as a heat-curable heat-resistant inorganic adhesive or glass frit. Fix airtightly. This airtight fixation does not necessarily require airtightness as long as the gap created between the outer wall of the inner tube 2 and the counterbore 6 of the spacer 8 is made small. Next, in this way, the inner tube 2
The spacer 8 is integrated with the stem 4, and both FM13. Arrange them so that they correspond to the grooves 1o. The spacer 8 and the stem 4 are fixed to each other by bending the spacer fixing encapsulated wire inward toward the upper surface of the spacer 8. Through this step, the electric oak 11 and each inner tube 2 are connected in series to form one discharge path. Fixing this spacer 8 to the stem 4 does not necessarily require airtightness as long as the gap is made small. After the open end of the outer tube 1 and the outer periphery of the stem 4 are hermetically sealed, the lamp part A#-i is completed by performing the usual electrode material activation process, exhausting, and charging gas for discharge from the exhaust pipe 14. .

而して、上記のような螢光ランプの内管２に鉛（８） ガラス（５ｊ０２　：　５０〜６０９６　、　Ｎａ、Ｑ
　、　ＫｚＯ：　１０〜１３％、ＰｂＯ：２０−３０％
、その他）を使用した場合。Therefore, the inner tube 2 of the fluorescent lamp as described above is made of lead (8) glass (5j02: 50-6096, Na, Q
, KzO: 10-13%, PbO: 20-30%
, etc.).

比較的短期間に内管２が黒・茶色に着色し、ガラスの透
過率が低下し、そのために下記のように比較的短期間に
発光束が低下するという欠点があった。すなわち、１６
Ｗ入力を与えた場合の発光束の時間変化を示すと。The inner tube 2 becomes colored black or brown in a relatively short period of time, and the transmittance of the glass decreases, resulting in a disadvantage that the luminous flux decreases in a relatively short period of time as described below. That is, 16
The following shows the change in luminous flux over time when W input is applied.

という形で急速に光束が低下する。同時に、内管２の外
壁に茶色の着色が進行する。この時のガラスの透過率を
測定すると。In this way, the luminous flux rapidly decreases. At the same time, the outer wall of the inner tube 2 is colored brown. Measure the transmittance of the glass at this time.

という形で急速に低下してゆくことが明らかになった。It is clear that the situation is rapidly declining.

本発明はかかる点に鑑みなされたもので、その目的とす
るところは、内管の内壁に発生する着色（４） 現象を除去することにより、光束劣化を改善した螢光ラ
ンプを提供するにある。The present invention has been made in view of the above, and its object is to provide a fluorescent lamp in which luminous flux deterioration is improved by eliminating the coloring phenomenon (4) that occurs on the inner wall of the inner tube. .

まず、上述の螢光ラングにおいて、内管２の内壁が黒色
に着色するメカニズムは内管２のナトリウム成分が、放
電空間内に存在している水銀との相互作用によるもので
あり、ガラス表面へ拡散移動したナトリウムイオンと水
銀イオンとが置換して、ガラス内部へ拡散したイオンが
コロイドとなって析出する為である。また、上述の螢光
ランプの場合、内径がＩＯＲ程度と細い為に放電管内の
電位分布が高く、水銀からの２５４Ｎ紫外線が強くなる
為に上記の現象が促進され、その結果早期に発光束が低
下する。First, in the above-mentioned fluorescent rung, the mechanism by which the inner wall of the inner tube 2 is colored black is due to the interaction of the sodium component in the inner tube 2 with mercury present in the discharge space, which causes the inner wall of the inner tube 2 to be colored black. This is because the sodium ions and mercury ions that have diffused and moved are replaced, and the ions that have diffused into the glass become colloids and precipitate. In addition, in the case of the above-mentioned fluorescent lamp, since the inner diameter is as small as IOR, the potential distribution inside the discharge tube is high, and the 254N ultraviolet rays from mercury become stronger, which accelerates the above phenomenon, and as a result, the luminous flux quickly decreases. descend.

そこで、上記内管２の内面に酸化インジウムから成る透
明導電性被膜を塗布し、更にその上に螢光体を塗布した
構成にすると、水銀とナトリウムとの接触が妨げられる
為に、内管２の内壁の黒化が抑止される。その結果１発
光束は と改善され、透、過率も と改善された。更に、内管２に透明導電性被膜が塗布さ
れている為に、始動性能も改善された。Therefore, if a transparent conductive coating made of indium oxide is coated on the inner surface of the inner tube 2, and a phosphor is further coated on top of that, contact between mercury and sodium is prevented, and the inner tube 2 The blackening of the inner walls of the walls is suppressed. As a result, the luminous flux was improved and the transmittance was also improved. Furthermore, since the inner tube 2 is coated with a transparent conductive coating, starting performance is also improved.

本発明は上記のように、外管とステムにより形成される
気密空間内に、複数本の屈曲内管をスペーサを介して直
列構成し、該内管の互いの連絡部の少なくとも１ケ所を
上記気密空間に対して開放すると共に、上記直列構成せ
る内管の両端に電極を設け、該内管を放電路とする螢光
ランプにおいて、上記内管の内面に透明導電性被膜を塗
布し。As described above, the present invention comprises configuring a plurality of bent inner tubes in series via a spacer in an airtight space formed by an outer tube and a stem, and connecting at least one of the mutually communicating portions of the inner tubes with each other as described above. In a fluorescent lamp that is open to an airtight space and has electrodes at both ends of the inner tubes arranged in series, and the inner tubes serve as discharge paths, a transparent conductive coating is applied to the inner surface of the inner tubes.

その上に螢光体を塗布したことを特徴とするので、内管
の着色によるガラスの透過率に基づく発光束の早期低下
を改善することができると共に、始動性能も改善できた
。Since it is characterized by coating a phosphor thereon, it is possible to improve the early drop in luminous flux due to the transmittance of the glass due to the coloring of the inner tube, and also to improve the starting performance.

（６）(6)

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

第１図は螢光ランプの斜視図、第２図は同上のラング部
の分解斜視図である。 ｌ・・・外管、２・・・内’！、８・・・スペーサ、４
・・・ステム、６・・・螢光体、８・・・連絡孔、田・
・・電極。 １間搾篠平１出願人 松下電工株式会社 代理人弁理士　竹　元　敏　丸 （ほか２名） 第１図FIG. 1 is a perspective view of the fluorescent lamp, and FIG. 2 is an exploded perspective view of the rung portion of the same. l...outer tube, 2...inner'! , 8... Spacer, 4
... Stem, 6... Fluorescent body, 8... Communication hole, field.
··electrode. 1 Applicant Matsushita Electric Works Co., Ltd. Representative Patent Attorney Toshimaru Takemoto (and 2 others) Figure 1

Claims (1)

【特許請求の範囲】[Claims] （１）外管とステムにより形成される気密空間内に、複
数本の屈曲内管をスペーサを介して直列構成し、該内管
の互いの連結部の少なくとも１ケ所を上記気密空間に対
して開放すると共に、上記直列構成せる内管の両端に電
極を設け、該内管を放電路とする螢光ランプにおいて、
上記内管の内面に透明導電性被嘆を塗布し、その上に螢
光体を塗布したことを特徴とする螢光ラング。(1) A plurality of bent inner tubes are arranged in series with spacers interposed in the airtight space formed by the outer tube and the stem, and at least one of the joints of the inner tubes is connected to the airtight space. In a fluorescent lamp which is open and has electrodes at both ends of the inner tube arranged in series, the inner tube serving as a discharge path,
A fluorescent lamp characterized in that the inner surface of the inner tube is coated with a transparent conductive coating, and a fluorescent material is coated thereon.