JPS5923450A - Fluorescent lamp - Google Patents

Abstract

PURPOSE:To improve early reduction of the luminous flux due to the discoloration of the inner tubes of a fluorescent lamp, which is constituted by vertically inserting a plural number of curved inner tubes into a spacer so that they work as electric discharge paths, by charging a getter in the spacer formed by the outer tube and the stem. 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 is provided on the lower surface of the spacer 3, between the insertion holes 7d and 7c. Lead wires 11 are airgithly 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), a getter, for example, Ba metal is charged in the space formed by the outer tube 1 and the stem 4. As a result, CO or CO2 is absorbed by the getter, and early reduction of the luminous flux caused by the discoloration of the inner tubes 2 can be improved.

Description

【発明の詳細な説明】 大発明は、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
の螢光ランプに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a compact fluorescent lamp 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図はこめ種の螢光ランプを示す斜視図で、ランプ部
Ａ、点灯装置部Ｂ１ねじ口金部Ｃより成り、第２図は上
記ランプ部Ａの分解斜視図である。FIG. 1 is a perspective view showing a fluorescent lamp for rice seeds, which consists of a lamp part A, a lighting device part B, and a screw cap part C. FIG. 2 is an exploded perspective view of the lamp part A.

ランプ部Ａは外管１、Ｕ字状内管２、スペーサ３（１）
゛ 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３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ｂ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、
　７ｂは、上下面が開口した連絡孔８で、また他方の隣
ね合う挿入孔７ｄ。Lamp part A consists of an outer tube 1, a U-shaped inner tube 2, and a spacer 3 (1).
The inner wall of the inner tube 2 is coated with a phosphor 5 and fired, and the spacer 3 has six inner tubes each having a counterbore 6 for positioning and fixing both ends of the inner tube 2. Pipe insertion holes 7a to 7f are provided. Among the six inner tube insertion holes 7a to 7f, adjacent insertion holes 7a,
7b is a communicating 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
て込る。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。ＩＯはステム４上にスペーサ３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木のリード線１１及び４木のスペーサ固定
用封入線しが封入されており、上記リード線１１の先端
には電極用が取付けられている。力お、１４は排気管で
ある。7c are connected to each other by a communication groove 9 which is open only on the lower surface. The reason why the communication hole 8 is provided is to make the space formed by the outer tube 1 and the stem 4 and the discharge space of each of the inner tubes 2 common. IO is a spacer fixing enclosure wire insertion groove for fixing the spacer 3 on the stem 4. The stem 4 has four lead wires 11 and four spacer fixing wires enclosed therein, and an electrode wire is attached to the tip of the lead wire 11. 14 is an 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３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３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
一体化したスペーサ３をステム４に、該ステム４に設け
た両電極ｍ、１３及びスペーサ固定用封入線稔が、スペ
ーサ３に設けた内管挿入孔７ｃ　、　７ｆ及び封入線挿
通溝ｌＯにそれぞれ対応するように配置すｂ０スペーサ
３とステム４との固定は、スペーサ固定用封入線徨をス
ペーサ３の上面内方向に折り曲げることにより行なう。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 attached to the spacer 3 using 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 3 is made small. Next, the spacer 3 integrated with the inner tube 2 in this way is attached to the stem 4, and the electrodes m and 13 provided on the stem 4 and the encapsulated wire for fixing the spacer are inserted into the inner tube insertion hole provided in the spacer 3. The stem 4 is fixed to the b0 spacer 3, which is disposed so as to correspond to 7c, 7f and the enclosing wire insertion groove lO, respectively, by bending the enclosing wire for fixing the spacer inward in the upper surface of the spacer 3.

この工程により電極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３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は完成するＯ 而して、上記のような螢光ランプの内管２に鉛ガラス（
Ｓｔｏｗ：５０〜８０　％、ＮａｘＯ１Ｋ２０　：　ｔ
ｏ　〜１３　％　＊ＰｂＯ：　２０〜３０チ、その他）
を使用した場合、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
。Through this step, the electrode 11 and each inner tube 2 are connected in series to form one discharge path. The fixing of the spacer 3 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 is completed by performing the usual electrode material activation process, exhausting, and charging gas for discharge from the exhaust pipe 14. Then, a lead glass (
Stow: 50-80%, NaxO1K20: t
o ~13% *PbO: 20~30chi, others)
When using this, the inner tube 2 becomes colored black or brown in a relatively short period of time, and the transmittance of the glass decreases, which has the disadvantage that the luminous flux decreases in a relatively short period of time as described below. .

すなわち、１６Ｗ入力を与えた場合の発光束の時間変化
を示すと、 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、 という形で急速に低下してめくことが明らかにたった。That is, if we show the temporal change in the luminous flux when 16 W input is given, the luminous flux rapidly decreases in the following form. At the same time, the outer wall of the inner tube 2 is colored brown. When we measured the transmittance of the glass at this time, we found that it rapidly decreased in the form of .

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、内管の外壁に発生する着色現象を除去する
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 an object of the present invention is to provide a fluorescent lamp in which luminous flux deterioration is improved by eliminating the coloring phenomenon that occurs on the outer wall of the inner tube.

まず、上述のように内管２が茶色に着色するメカニズム
について考える。放電空間内での水銀から発生する１８
５　ｎｍ及び２５３ｎｍ紫外線により、管内の接着剤及
びスペーサ３から放出されだＣＯ、ＣＯｔが管内の水銀
と反応して Ｈｇ＋ＣＯ雪→Ｈｇｏ＋　Ｃ０ と々ったり、ある込は紫外線によりＣＯｓがＣＯにｈる
。このＣｏと内管２のガラス成分のＰｂＯとが反応して ＰｂＯ＋　　ｃｏ　−ＩＰｂ　＋Ｃｏｔと々す、　Ｐｂ
が内管の外壁に析出し、茶色に着色す°　る。この着色
が光束の早期劣化の一因となる。First, consider the mechanism by which the inner tube 2 is colored brown as described above. 18 generated from mercury in the discharge space
Due to the 5 nm and 253 nm ultraviolet rays, the CO and COt released from the adhesive and spacer 3 inside the tube react with the mercury inside the tube to form Hg + CO snow → Hgo + CO. . This Co reacts with PbO, the glass component of the inner tube 2, to form PbO+ co -IPb +Cot, Pb
precipitates on the outer wall of the inner tube, turning it brown. This coloring causes early deterioration of the luminous flux.

そこで、前述の外管１とステム４とで形成される空間内
にゲッター（例えば金属Ｂａ　）を封入すると、接着剤
及びスペーサ３から放出されたＣ０−Ｃｏｔが上記ゲッ
ターに吸着され、上述のＰｂＯが環元される反応が起ら
なく々す、内管２の茶着色がなくなる。その結果、ガラ
スの透過率は（５） と改善され、発光束も と改善された。Therefore, when a getter (for example, metal Ba) is sealed in the space formed by the outer tube 1 and the stem 4, the CO-Cot released from the adhesive and the spacer 3 is adsorbed by the getter, and the above-mentioned PbO The brown coloring of the inner tube 2 disappears because the reaction in which is converted into a ring does not occur. As a result, the transmittance of the glass was improved to (5), and the luminous flux was also improved.

未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、該内管の互いの連結部の少なくと本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、上記外管とステムにより形成される空
間内にゲッターを封入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の低下に基づく発光束の早
期低下を改善することができた。As described above, a plurality of bent inner tubes are arranged in series via a spacer in an airtight space formed by an outer tube and a stem, and at least one of the connecting portions of the inner tubes is connected to each other. is open to the airtight space, and electrodes are provided at both ends of the inner tube arranged in series, and in a fluorescent lamp that uses the inner tube as a discharge path, a getter is placed in the space formed by the outer tube and the stem. , it was possible to improve the early decrease in luminous flux caused by the decrease in the transmittance of the glass due to the coloring of the inner tube.

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

＠１図は螢光ランプの斜視図、第２図は同上の（６） ランプ部の分解斜視図である。 】・・・外管、２・・・内管、３・・・スペーサ、４・
・・ステム、５・・・螢光体、８・・・連絡孔、和・・
・電極。 特許出願人 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Figure 1 is a perspective view of the fluorescent lamp, and Figure 2 is an exploded perspective view of the lamp part (6) of the same. ]...Outer tube, 2...Inner tube, 3...Spacer, 4...
... Stem, 5... Fluorescent body, 8... Communication hole, sum...
·electrode. Patent applicant Matsushita Electric Works Co., Ltd. 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、
上記外管とステムに上り形成される空間内にゲッターを
封入したことを特徴と干る螢光ランプ。(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 a getter is enclosed in the space formed by the outer tube and the stem.