JP4977808B2 - One-piece fluorescent lamp with spiral arc tube - Google Patents
One-piece fluorescent lamp with spiral arc tube Download PDFInfo
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この発明は、螺旋状発光管を有する片口金蛍光ランプの初点灯時に発生する、水銀不均一による光束立上り特性の改善に関する。 The present invention relates to an improvement in the rising characteristics of luminous flux due to non-uniform mercury that occurs when a one-piece fluorescent lamp having a spiral arc tube is turned on for the first time.
近年、電球形蛍光ランプは、一般白熱電球に相当する程度にまで小型化され、一般白熱電球用器具の光源を電球形蛍光ランプに置き換えるという需要が促進されている。 In recent years, light bulb-type fluorescent lamps have been reduced in size to the extent corresponding to general incandescent light bulbs, and the demand for replacing light sources of general incandescent light bulbs with light bulb-type fluorescent lamps has been promoted.
この電球形蛍光ランプの一例として、発光管を螺旋状に屈曲させることにより放電路を長くして蛍光ランプを小形化したものが提案されている（例えば、特許文献１参照）。 As an example of the bulb-type fluorescent lamp, a fluorescent lamp is proposed that has a longer discharge path by bending the arc tube in a spiral shape (see, for example, Patent Document 1).
また、蛍光体膜が水銀を含有した合金によって傷つけられるのを防止するとともに、製造工程において、排気効率を向上させるために、内面に蛍光体膜３が形成されたバルブと、このバルブの端部に封止され、かつ電極および排気管を有するステムとを備え、排気管内には、水銀を含有した合金と、この合金がバルブ内へ入り込むのを阻止するための網状体とが配置されている蛍光ランプが提案されている（例えば、特許文献２参照）。 Further, in order to prevent the phosphor film from being damaged by an alloy containing mercury and to improve exhaust efficiency in the manufacturing process, a bulb having the phosphor film 3 formed on the inner surface and an end portion of the bulb And a stem having an electrode and an exhaust pipe, and an alloy containing mercury and a net for preventing the alloy from entering the valve are disposed in the exhaust pipe. A fluorescent lamp has been proposed (see, for example, Patent Document 2).
ランプ完成後の初回点灯時における水銀は、当初水銀放出源が設置された場所近辺に偏在しており、点灯とともにランプ発光管温度が上昇し、水銀はその温度分布に従って拡散移動し、均一性を増す。この初回点灯時は、その水銀の偏在によって、発光管に輝度ムラが発生し、明るい部分と暗い部分とが発生するという課題があった。 Mercury during the first lighting after the lamp is completed is unevenly distributed near the place where the mercury emission source was originally installed, and the lamp arc tube temperature rises as the lamp is lit. Increase. At the time of the first lighting, there is a problem that uneven brightness occurs in the arc tube due to the uneven distribution of mercury, and a bright portion and a dark portion are generated.
この発明は、上記のような課題を解決するためになされたもので、初回点灯時から輝度ムラの少ない螺旋状発光管を有する片口金蛍光ランプを提供することを目的とする。 The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a single-piece fluorescent lamp having a spiral arc tube with little luminance unevenness from the first lighting.
この発明に係る螺旋状発光管を有する片口金蛍光ランプは、螺旋状発光管と、この螺旋状発光管の一方の端部から延出し、螺旋状発光管内部の排気を行う排気管と、この排気管内の所定位置に設置される第１の水銀放出源と、螺旋状発光管内に設けられ、螺旋状発光管内を移動可能な第２の水銀放出源とを備えたことを特徴とする。 A single-ended fluorescent lamp having a spiral arc tube according to the present invention includes a spiral arc tube, an exhaust tube extending from one end of the spiral arc tube and exhausting the inside of the spiral arc tube, A first mercury emission source installed at a predetermined position in the exhaust pipe and a second mercury emission source provided in the spiral arc tube and movable in the spiral arc tube.
また、この発明に係る螺旋状発光管を有する片口金蛍光ランプは、第２の水銀放出源の形状を略球状としたことを特徴とする。 In addition, the single lamp fluorescent lamp having a spiral arc tube according to the present invention is characterized in that the second mercury emission source has a substantially spherical shape.
また、この発明に係る螺旋状発光管を有する片口金蛍光ランプは、第１の水銀放出源が水銀蒸気圧が液状水銀と比べて低く調整された水銀合金で、第２の水銀放出源が水銀蒸気圧が液状水銀と比べて略等しい水銀合金であることを特徴とする。 Further, in the one-piece fluorescent lamp having a spiral arc tube according to the present invention, the first mercury emission source is a mercury alloy whose mercury vapor pressure is adjusted to be lower than that of liquid mercury, and the second mercury emission source is mercury. It is a mercury alloy having a vapor pressure substantially equal to that of liquid mercury.
また、この発明に係る螺旋状発光管を有する片口金蛍光ランプは、第１の水銀放出源と第２の水銀放出源とに含まれる合計の水銀重量の、第１の水銀放出源の重量に対する割合を、ランプ点灯中の水銀蒸気圧及び相対効率が適正な値になるように設定することを特徴とする。 Moreover, the single-ended fluorescent lamp having a spiral arc tube according to the present invention is configured such that the total mercury weight contained in the first mercury emission source and the second mercury emission source is relative to the weight of the first mercury emission source. The ratio is set so that the mercury vapor pressure and the relative efficiency during lamp operation become appropriate values.
また、この発明に係る螺旋状発光管を有する片口金蛍光ランプは、第２の水銀放出源がＺｎ−Ｈｇ合金であることを特徴とする。 In addition, the one-piece fluorescent lamp having a spiral arc tube according to the present invention is characterized in that the second mercury emission source is a Zn-Hg alloy.
また、この発明に係る螺旋状発光管を有する片口金蛍光ランプは、第２の水銀放出源が、シリカ、アルミナ、チタニア及び鉄のうち少なくとも一つを主体として構成された多孔質媒体に水銀を含漬させたものであることを特徴とする。 Further, in the one-piece fluorescent lamp having a spiral arc tube according to the present invention, the second mercury emission source is composed of mercury in a porous medium mainly composed of at least one of silica, alumina, titania and iron. It is characterized by being impregnated.
この発明に係る螺旋状発光管を有する片口金蛍光ランプは、水銀放出源が第１の水銀放出源と、第２の水銀放出源とに分割されているので、水銀の偏在が緩和されている。更に、ランプの点灯姿態が、口金を上にしたベースアップ（ＢＵ）、水平状態（ＢＨ）のいずれの場合でも、螺旋状発光管が螺旋状をしているため、第２の水銀放出源が発光管内を自由に移動し、ランプ利用者が見上げる位置に留まり、ここから水銀を放出することとなり、排気管内に設置された第１の水銀放出源と合わせて、螺旋状発光管内に水銀を供給する。そのため、排気管内にのみ設置される場合に比べ、早く螺旋状発光管内の水銀蒸気圧を飽和させることができる。また螺旋状発光管内に固定されずに設置される第２の水銀放出源は、一般に照明を必要とするランプ下部に重力で移動するため、ランプ下部の水銀蒸気圧を部分的ではあるが上昇させる。これにより、初回点灯時の光束立上り特性を改善できる。 In the single-ended fluorescent lamp having a spiral arc tube according to the present invention, the mercury emission source is divided into the first mercury emission source and the second mercury emission source, so that the uneven distribution of mercury is reduced. . In addition, in any case where the lamp is in the base-up (BU) or horizontal (BH) state with the base up, the spiral arc tube has a spiral shape. It moves freely in the arc tube, stays at the position where the lamp user looks up, and releases mercury from here, supplying mercury into the spiral arc tube together with the first mercury emission source installed in the exhaust tube To do. Therefore, it is possible to saturate the mercury vapor pressure in the spiral luminous tube faster than in the case where it is installed only in the exhaust tube. In addition, the second mercury emission source installed without being fixed in the spiral luminous tube generally moves under gravity to the lower part of the lamp that needs illumination, and thus raises the mercury vapor pressure in the lower part of the lamp, albeit partially. . Thereby, it is possible to improve the light beam rising characteristics at the first lighting.
実施の形態１．
図１乃至図６は実施の形態１を示す図で、図１は電球形蛍光ランプ１の正面図、図２は電球形蛍光ランプ１の断面を示す正面図（図１のＡ−Ａ断面図）、図３は口金５を上にしたベースアップ時の電球形蛍光ランプ１の内部構成を示す正面図、図４は水平状態の電球形蛍光ランプ１の内部構成を示す正面図、図５は水銀アマルガム（水銀蒸気圧が液状水銀と比べて低く調整された水銀合金）の温度と水銀蒸気圧及び相対効率との関係を示す図（パラメータは水銀含有量）、図６は光束立上り特性を示す図である。
Embodiment 1 FIG.
1 to 6 show the first embodiment. FIG. 1 is a front view of the bulb-type fluorescent lamp 1, and FIG. 2 is a front view showing a section of the bulb-type fluorescent lamp 1. FIG. 3 is a front view showing the internal configuration of the bulb-type fluorescent lamp 1 when the base is up with the base 5 up, FIG. 4 is a front view showing the internal configuration of the bulb-type fluorescent lamp 1 in a horizontal state, and FIG. Fig. 6 shows the relationship between the temperature of mercury amalgam (mercury alloy whose mercury vapor pressure is adjusted to be lower than that of liquid mercury), mercury vapor pressure and relative efficiency (parameter is mercury content), and Fig. 6 shows the rising characteristics of luminous flux. FIG.
図１に示すように、電球形蛍光ランプ１（螺旋状発光管を有する片口金蛍光ランプの一例）は、電気接続部を有する口金５が一端に接合される、樹脂製のハウジング４と、内部に後述する螺旋状発光管を収納し、ハウジング４の他端に接合される、ガラス製の外管バルブ６とを備える。 As shown in FIG. 1, a bulb-type fluorescent lamp 1 (an example of a single-piece fluorescent lamp having a spiral arc tube) includes a resin-made housing 4 in which a base 5 having an electrical connection portion is joined to one end, And a glass-made outer tube bulb 6 which is connected to the other end of the housing 4.
図２に示すように、電球形蛍光ランプ１は、螺旋状発光管２と、この螺旋状発光管２を点灯させるための安定器３（点灯回路）と、安定器３を収納し且つ口金５を有するハウジング４と、螺旋状発光管２を覆う外管バルブ６とを備えている。螺旋状発光管２内部には、緩衝ガスとしての混合ガスが封入されている。 As shown in FIG. 2, the bulb-type fluorescent lamp 1 includes a spiral arc tube 2, a ballast 3 (lighting circuit) for lighting the spiral arc tube 2, a ballast 3, and a base 5. And an outer bulb 6 that covers the spiral arc tube 2. A gas mixture as a buffer gas is sealed inside the spiral luminous tube 2.
螺旋状発光管２の端部は、プレート８に挿入されて、例えばシリコン等の接着剤によりプレート８に固着されている。プレート８の螺旋状発光管２と反対側には、基板９に種々の電子部品からなる安定器３（点灯回路）が取り付けられている。 The end of the spiral luminous tube 2 is inserted into the plate 8 and fixed to the plate 8 with an adhesive such as silicon. A ballast 3 (lighting circuit) made of various electronic components is attached to the substrate 9 on the opposite side of the plate 8 from the spiral arc tube 2.
螺旋状発光管２の一方の端部から、螺旋状発光管２内部の排気を行うための排気管７が、プレート８を貫通してハウジング４内の安定器３を収納した空間の上部まで延出している。 From one end of the spiral luminous tube 2, an exhaust tube 7 for exhausting the inside of the spiral luminous tube 2 extends through the plate 8 to the upper part of the space in which the ballast 3 in the housing 4 is accommodated. I'm out.
排気管７内には、第１の水銀放出源１０が設けられる。第１の水銀放出源１０は、水銀蒸気圧が液状水銀と比べて低く調整された水銀合金で、通常水銀アマルガムと呼ばれるものである。これは、例えば、Ｉｎを主成分とするアマルガム形態、Ｉｎ−Ｂｉ−Ｈｇである。その他、Ｐｂを主成分とするアマルガム形態、Ｐｂ−Ｂｉ−Ｓｎ−Ｈｇでもよい。 A first mercury emission source 10 is provided in the exhaust pipe 7. The first mercury emission source 10 is a mercury alloy whose mercury vapor pressure is adjusted to be lower than that of liquid mercury, and is usually called a mercury amalgam. This is, for example, an amalgam form having In as a main component, In-Bi-Hg. In addition, the amalgam form which has Pb as a main component and Pb-Bi-Sn-Hg may be sufficient.
さらに、螺旋状発光管２内部に、第２の水銀放出源１１を封入する。第２の水銀放出源１１は、螺旋状発光管２内部を移動可能であり、その形状は、例えば略球状が好ましいが、他の形状でもよい。第２の水銀放出源１１を略球状にするのは、移動し易くするためと、螺旋状発光管２内面に形成される蛍光体に傷を付けないためである。 Further, the second mercury emission source 11 is sealed inside the spiral luminous tube 2. The second mercury emission source 11 can move inside the spiral arc tube 2 and its shape is preferably, for example, a substantially spherical shape, but may be other shapes. The reason why the second mercury emission source 11 is made substantially spherical is that it is easy to move and that the phosphor formed on the inner surface of the spiral arc tube 2 is not damaged.
第２の水銀放出源１１は、水銀蒸気圧が液状水銀と比べて略等しい水銀合金であり、例えば、Ｚｎ−Ｈｇ合金を使用する。Ｚｎ−Ｈｇ合金は、重量割合でＺｎとＨｇとが、半々である。 The second mercury emission source 11 is a mercury alloy whose mercury vapor pressure is substantially equal to that of liquid mercury, and for example, a Zn—Hg alloy is used. The Zn—Hg alloy is half of Zn and Hg by weight.
尚、第２の水銀放出源１１は、シリカ、アルミナ、チタニア及び鉄のうち少なくとも一つを主体として構成された多孔質媒体に水銀を含漬させたものでもよい。 The second mercury emission source 11 may be one in which mercury is impregnated in a porous medium mainly composed of at least one of silica, alumina, titania and iron.
図２の電球形蛍光ランプ１は、口金が上になるベースアップ時（ＢＵ）の姿態であるが、この場合第２の水銀放出源１１は、螺旋状発光管２の下端に位置する。 The bulb-type fluorescent lamp 1 in FIG. 2 is in a base-up (BU) state where the base is on the upper side. In this case, the second mercury emission source 11 is located at the lower end of the spiral luminous tube 2.
図３の口金５を上にしたベースアップ時の電球形蛍光ランプ１においても、第２の水銀放出源１１は、螺旋状発光管２の下端に位置する。 Also in the bulb-type fluorescent lamp 1 with the base 5 facing up in FIG. 3, the second mercury emission source 11 is located at the lower end of the spiral luminous tube 2.
図４の水平状態の電球形蛍光ランプ１では、第２の水銀放出源１１は、螺旋状発光管２の先端（反口金側）から管内を移動して、螺旋状発光管２の中間位置の水平状態におけるいずれかの下部に位置する。 In the horizontal fluorescent lamp 1 of FIG. 4, the second mercury emission source 11 moves in the tube from the tip (on the side of the base) of the spiral arc tube 2, and is at an intermediate position of the spiral arc tube 2. Located at either bottom in the horizontal state.
このように、本実施の形態は、水銀放出源を複数（何個でもよい）に分割する点に特徴がある。しかも、電球形蛍光ランプ１の利用者が見上げる位置に必ず水銀放出源が存在する点に特徴がある。 Thus, the present embodiment is characterized in that the mercury emission source is divided into a plurality (any number). Moreover, it is characterized in that a mercury emission source always exists at a position where the user of the bulb-type fluorescent lamp 1 looks up.
水銀放出源が第１の水銀放出源１０と、第２の水銀放出源１１とに分割されているので、水銀の偏在が緩和される。更に、電球形蛍光ランプ１の点灯姿態が、口金５が上になるベースアップ（ＢＵ）時、水平（ＢＨ）時のいずれの場合でも、螺旋状発光管２であることにより、略球状の第２の水銀放出源１１が螺旋状発光管２内に固定されずに螺旋状発光管２内を自由に移動し、利用者が見上げる位置に留まり、ここから水銀を放出することとなり、排気管７内に設置された第１の水銀放出源１０と合わせて、螺旋状発光管２内に水銀を供給する。そのため、排気管７内にのみに水銀放出源が設置される場合に比べ、早く螺旋状発光管２内の水銀蒸気圧を飽和させることができる。また、螺旋状発光管２内に固定されずに設置される第２の水銀放出源１１は、一般に照明を必要とするランプ下部に重力で移動するため、ランプ下部の水銀蒸気圧を部分的ではあるが上昇させる。これにより、初回点灯時の光束立上り特性を改善できる。 Since the mercury emission source is divided into the first mercury emission source 10 and the second mercury emission source 11, uneven distribution of mercury is alleviated. Further, the light-emitting fluorescent lamp 1 is turned on in a spiral arc tube 2 regardless of whether the lamp 5 is in the base-up (BU) or horizontal (BH) state where the cap 5 is up, so The mercury emission source 2 is not fixed in the spiral luminous tube 2 but freely moves in the spiral luminous tube 2 and stays at a position where the user looks up, and mercury is emitted from this, and the exhaust tube 7 Together with the first mercury emission source 10 installed in the inside, mercury is supplied into the spiral luminous tube 2. Therefore, it is possible to saturate the mercury vapor pressure in the spiral luminous tube 2 faster than in the case where the mercury emission source is installed only in the exhaust tube 7. In addition, the second mercury emission source 11 installed without being fixed in the spiral luminous tube 2 generally moves by gravity to the lower part of the lamp that needs illumination, so that the mercury vapor pressure in the lower part of the lamp is partially reduced. There is a rise. Thereby, it is possible to improve the light beam rising characteristics at the first lighting.
次に、第１の水銀放出源１０と、第２の水銀放出源１１との水銀含有量について言及する。図５は水銀アマルガム（水銀蒸気圧が液状水銀と比べて低く調整された水銀合金）の温度と水銀蒸気圧及び相対効率との関係を示す図（パラメータは水銀含有量）で、出典はＪＯＵＲＮＡＬ ＯＦ ＩＥＳ／ＡＰＲＩＬ １９７７「Ｓｏｍｅ ｎｅｗ ｍｅｒｃｕｒｙ ａｌｌｏｙｓ ｆｏｒ ｕｓｅ ｆｌｕｏｒｅｓｃｅｎｔ ｌａｍｍｐｓ」 ｐｐ１４４である。 Next, the mercury content of the first mercury emission source 10 and the second mercury emission source 11 will be described. Fig. 5 is a graph showing the relationship between the temperature of mercury amalgam (mercury alloy whose mercury vapor pressure is adjusted to be lower than that of liquid mercury), mercury vapor pressure and relative efficiency (parameter is mercury content). Source is JOURNAL OF IES / APRIL 1977 “Some new merchandise fors for fluorescent lamps” pp144.
本実施の形態の電球形蛍光ランプ１（型名：ＥＦＡ１５／１３）の点灯時の排気管７の温度、即ち第１の水銀放出源１０の温度は約１２０℃である。通常水銀アマルガムと呼ばれる第１の水銀放出源１０の温度が１２０℃付近で、相対効率が１００％付近になる第１の水銀放出源１０の水銀含有量は、図５によれば３％程度である。 The temperature of the exhaust pipe 7 when the bulb-type fluorescent lamp 1 (type name: EFA15 / 13) of the present embodiment is turned on, that is, the temperature of the first mercury emission source 10 is about 120 ° C. According to FIG. 5, the mercury content of the first mercury emission source 10 which is normally called mercury amalgam, the temperature of the first mercury emission source 10 is about 120 ° C. and the relative efficiency is about 100% is about 3% according to FIG. is there.
本実施の形態の電球形蛍光ランプ１は、水銀放出源として第１の水銀放出源１０と、第２の水銀放出源１１とを使用しているので、第１の水銀放出源１０と第２の水銀放出源１１との両者に含まれる水銀量の合計が、第１の水銀放出源１０の重量に対して３％程度が好ましいということになる。第１の水銀放出源１０と第２の水銀放出源１１との水銀の配分は、任意でよい。 Since the bulb-type fluorescent lamp 1 of the present embodiment uses the first mercury emission source 10 and the second mercury emission source 11 as the mercury emission source, the first mercury emission source 10 and the second mercury emission source 10 are used. Therefore, the total amount of mercury contained in both the mercury emission source 11 and the mercury emission source 11 is preferably about 3% with respect to the weight of the first mercury emission source 10. The distribution of mercury between the first mercury emission source 10 and the second mercury emission source 11 may be arbitrary.
本実施の形態の電球形蛍光ランプ１の光束立上り特性を、ＥＦＡ１５／１３について測定した。その結果を図６に示す。測定は、本実施の形態の仕様のものと、第１の水銀放出源１０のみを用いたものとを比較した。ランプ姿態は、口金５を上にしたベースアップ（ＢＵ）である。測定前に、各ランプを３個づつ、２４時間−５℃の雰囲気に放置した。そして、ランプ真下（３０ｃｍ）の相対照度を測定した。図６から解るように、ランプ点灯開始から、数十秒までの相対照度が、本実施の形態の電球形蛍光ランプ１は、第１の水銀放出源１０のみのものより改善されている。 The luminous flux rising characteristics of the bulb-type fluorescent lamp 1 of the present embodiment were measured for EFA15 / 13. The result is shown in FIG. The measurement was made by comparing the specifications of the present embodiment with those using only the first mercury emission source 10. The lamp appearance is a base-up (BU) with the base 5 facing up. Before the measurement, each of the three lamps was left in an atmosphere at -5 ° C for 24 hours. Then, the relative illuminance just below the lamp (30 cm) was measured. As can be seen from FIG. 6, the relative illuminance from the start of lamp operation to several tens of seconds is improved in the bulb-type fluorescent lamp 1 of the present embodiment as compared with the first mercury emission source 10 alone.
以上の説明は、電球形蛍光ランプ１について行ったが、電球形蛍光ランプ１以外に螺旋状発光管を有するコンパクト蛍光ランプにも、本実施の形態は適用可能である。従って、螺旋状発光管を有する片口金蛍光ランプが対象となる。 Although the above description has been made with respect to the bulb-type fluorescent lamp 1, the present embodiment can also be applied to a compact fluorescent lamp having a spiral arc tube in addition to the bulb-type fluorescent lamp 1. Therefore, a single-piece fluorescent lamp having a spiral arc tube is a target.
１ 電球形蛍光ランプ、２ 螺旋状発光管、３ 安定器、４ ハウジング、５ 口金、６ 外管バルブ、７ 排気管、８ プレート、９ 基板、１０ 第１の水銀放出源、１１ 第２の水銀放出源。 DESCRIPTION OF SYMBOLS 1 Light bulb type fluorescent lamp, 2 Spiral luminous tube, 3 Ballast, 4 Housing, 5 base, 6 Outer bulb, 7 Exhaust tube, 8 Plate, 9 Substrate, 10 First mercury emission source, 11 Second mercury Emission source.
Claims (4)
この螺旋状発光管の一方の端部から延出し、該螺旋状発光管内部の排気を行う排気管と、
この排気管内の所定位置に設置される第１の水銀放出源と、
前記螺旋状発光管内に設けられ、該螺旋状発光管内を移動可能な第２の水銀放出源とを備え、
前記第１の水銀放出源と前記第２の水銀放出源とに含まれる合計の水銀重量の、前記第１の水銀放出源の重量に対する割合を、３％程度とし、
前記第１の水銀放出源が、Ｉｎ−Ｂｉ−Ｈｇ又はＰｂ−Ｂｉ−Ｓｎ−Ｈｇであり、
前記第２の水銀放出源が、Ｚｎ−Ｈｇ合金であることを特徴とする螺旋状発光管を有する片口金蛍光ランプ。 A spiral arc tube;
An exhaust pipe extending from one end of the spiral arc tube and exhausting the spiral arc tube;
A first mercury emission source installed at a predetermined position in the exhaust pipe;
A second mercury emission source provided in the spiral arc tube and movable in the spiral arc tube;
The ratio of the total mercury weight contained in the first mercury emission source and the second mercury emission source to the weight of the first mercury emission source is about 3%,
The first mercury emission source is In-Bi-Hg or Pb-Bi-Sn-Hg;
The single lamp fluorescent lamp having a spiral arc tube, wherein the second mercury emission source is a Zn-Hg alloy .
この螺旋状発光管の一方の端部から延出し、該螺旋状発光管内部の排気を行う排気管と、An exhaust pipe extending from one end of the spiral arc tube and exhausting the spiral arc tube;
この排気管内の所定位置に設置される第１の水銀放出源と、A first mercury emission source installed at a predetermined position in the exhaust pipe;
前記螺旋状発光管内に設けられ、該螺旋状発光管内を移動可能な第２の水銀放出源とを備え、A second mercury emission source provided in the spiral arc tube and movable in the spiral arc tube;
前記第１の水銀放出源と前記第２の水銀放出源とに含まれる合計の水銀重量の、前記第１の水銀放出源の重量に対する割合を、３％程度とし、The ratio of the total mercury weight contained in the first mercury emission source and the second mercury emission source to the weight of the first mercury emission source is about 3%,
前記第１の水銀放出源が、Ｉｎ−Ｂｉ−Ｈｇ又はＰｂ−Ｂｉ−Ｓｎ−Ｈｇであり、The first mercury emission source is In-Bi-Hg or Pb-Bi-Sn-Hg;
前記第２の水銀放出源が、シリカ、アルミナ、チタニア及び鉄のうち少なくとも一つを主体として構成された多孔質媒体に水銀を含漬させたものであることを特徴とする螺旋状発光管を有する片口金蛍光ランプ。A spiral arc tube characterized in that the second mercury emission source is a porous medium mainly composed of at least one of silica, alumina, titania and iron, and mercury is impregnated therein. Having a single-piece fluorescent lamp.
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