JPS5923449A - 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 coating the inner-tube supporting part of the lamp with a very thin protective film. 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 and spacer- fixing sealed wires 12 are airtightly fitted into the stem 4, and electrodes 13 are attached to 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), an inner-tube supporting part consisting of the spacer 3, the sealed wires 12, an adhesive and the like, is coated with a very thin protective film made of, for example, TiO2. As a result, the generation of CO is suppressed, and early reduction of the luminous flux due to the discoloration of the inner tube 2 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図はこの種の螢光ランプを示す斜視図で、ランプ部
Ａ１点灯装置部Ｂ、ねじ口金部Ｃより成り、＠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 this type of fluorescent lamp, 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ｈ１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３１こは内管２の両端
を位置決め固定するだめの座ぐり部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のうち互いに隣ね合う挿入孔７ａ
〜７ｂは、上下面が開口した連絡孔８で、また他方の隣
り合う挿入孔７ｄ。The lamp section A consists of an outer tube 1, a U-shaped inner tube 2, a spacer 3 (1), and a stem 4. The inner wall of the inner tube 2 is coated with a phosphor 5 and fired, and the spacer 31 is attached to the inner wall of the inner tube 2. Six inner tube insertion holes 7a to 7f having counterbore portions 6 for positioning and fixing both ends of the tube 2 are provided. Insertion holes 7a adjacent to each other among the six inner tube insertion holes 7a to 7f
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。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大のリード線１１及び４大のスペーサ固定
用封入線丘が封入されており、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 communication hole 8 is provided in order 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 large lead wires 11 and four large spacer fixing wire ridges enclosed therein, and an electrode 13 is attached to the tip of the lead wire 11. Note that 14 is an exhaust pipe.

次に組立につ−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ｌす＼ 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−。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１３．１３及びスペ
ーサ固定用封入線しが、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
るように配置する。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Ｕ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。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の関口端とステム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１こよりランプ部
Ａけ完成する。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 attached to the spacer 3 using an adhesive such as a heat-curable heat-resistant inorganic adhesive or glass frit. Fix in an airtight manner. 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 13, 13 provided on the stem 4 and the enclosed wire for fixing the spacer are inserted into the inner tube insertion hole provided in the spacer 3. 7c, 7f and the enclosing wire insertion groove lO, respectively. To fix the spacer 3 and stem 4,
This is done by bending the spacer fixing encapsulation line U toward the inside of the upper surface of the spacer 3. 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 entrance 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.

而して、上記のような螢光ランプの内管２に鉛ガラス（
ＳｉＯ２：５０〜６０％、ＮａｚＯ＋　ＫｘＯ：　ＩＱ
　〜ｍ％　＊ＰｂＯ：２０〜３０％、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、１
６Ｗ入力を与えた場合の発光束の時間変化を示すと、 と−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−う形で急速に低下してゆくことが明らかにｈつだ。Therefore, lead glass (
SiO2: 50-60%, NazO+KxO: IQ
~m% *PbO: 20-30%, etc.), the inner tube 2 will be colored black or brown in a relatively short period of time, and the transmittance of the glass will decrease, resulting in a short period of time as shown below. However, there was a drawback that the luminous flux decreased. That is, 1
The time change in the luminous flux when a 6W input is given shows that the luminous flux rapidly decreases in the following manner. At the same time, the outer wall of the inner tube 2 is colored brown. If you measure the transmittance of the glass at this time, it is clear that it rapidly decreases in the shape of a .

本発明はかかる点に鑑みなされたもので、その目的とす
ふところは、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 its object 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。放電灯空間内で水銀から発生する１８
５　ｎｍ及び２５４　ｎ　ｍ紫外線により、管内の内管
保持部分（スペーサ３、封入線し、接着剤等より成る）
から放出されたＣＯと、内管２のガラス成分のＰｂＯと
が反応して ＰｂＯ＋　Ｃｏ→Ｐｂ　＋　Ｃｏｗ となり　、　ｐｂが内管の外壁に析出し、茶色に着色す
る事に起因するものであることが判明した。First, consider the mechanism by which the inner tube 2 is colored brown as described above. 18 generated from mercury in the discharge lamp space
The inner tube holding part (consisting of spacer 3, encapsulating wire, adhesive, etc.) inside the tube is exposed to 5 nm and 254 nm ultraviolet rays.
This is because the CO released from the inner tube reacts with PbO, the glass component of the inner tube 2, to form PbO + Co → Pb + Cow, and Pb precipitates on the outer wall of the inner tube, coloring it brown. There was found.

そこで、上記ＣＯの発生源である内管保持部分を緻密な
保護膜（例えばＴｉｅｓ）でコーティングして試験した
結果、発光束は と改善され、透過率も と改善された。Therefore, as a result of testing by coating the inner tube holding portion, which is the source of CO, with a dense protective film (eg, Ties), the luminous flux was improved and the transmittance was also improved.

本発明は上記のように、外壁とステムによす形成される
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々くとも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、上記内管の保持部分を緻密な保護膜で
コーティングしたことを特徴とするので、内管の着色に
よるガラス透過率の低下に基づ〈発光束の早期低下を改
善することができた。As described above, the present invention comprises a plurality of bent inner tubes arranged in series with spacers interposed in the airtight space formed by the outer wall and the stem, and at least one of the connecting portions of the inner tubes is arranged in series. In a fluorescent lamp in which the inner tube is opened to the airtight space and electrodes are provided at both ends of the inner tube arranged in series, and the inner tube serves as a discharge path, the holding portion of the inner tube is covered with a dense protective film. Since it is characterized by a coating, it was possible to improve the early decrease in luminous flux due to the decrease in glass transmittance due to the coloring of the inner tube.

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

第１図は螢光ランプの斜視図、第２図は同上のランプ部
の分解斜視図である。 １・・・外管、２・・・内管、３・・・スペーサ、４・
・・ステム、５・・・螢光体、８・・・連絡孔、詔・・
・電極。 （６） 第１図 ２ 第２図FIG. 1 is a perspective view of the fluorescent lamp, and FIG. 2 is an exploded perspective view of the same lamp section. 1...Outer tube, 2...Inner tube, 3...Spacer, 4...
... Stem, 5... Fluorescent body, 8... Communication hole, Imperial order...
·electrode. (6) Figure 1 2 Figure 2

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、上記内管の保持部分を緻密々保膜膜でコーティング
したことを特徴とする螢光ランプ。(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. The fluorescent lamp is open and electrodes are provided at both ends of the inner tubes arranged in series, and the inner tubes serve as discharge paths, characterized in that the holding portion of the inner tubes is densely coated with a protective film. Fluorescent lamp.