JP2005276561A - Single-base fluorescent lamp and manufacturing method of single-base fluorescent lamp as well as fluorescent lamp - Google Patents
Single-base fluorescent lamp and manufacturing method of single-base fluorescent lamp as well as fluorescent lamp Download PDFInfo
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この発明は、U管を用いた片口金蛍光ランプに係わり、周囲温度が25℃において、放電管内の最も温度の低い部分である最冷点の温度が自己発熱と周囲温度との相関において最適になるようにして、ランプの明るさを最大にした、水銀アマルガムによる水銀蒸気圧規制を行わない片口金蛍光ランプ及び片口金蛍光ランプの製造方法に関するものである。また、この発明は放電管が少なくとも1箇所以上屈曲部を有する蛍光ランプも含む。 The present invention relates to a single-tube fluorescent lamp using a U tube, and at the ambient temperature of 25 ° C., the coldest point temperature, which is the lowest temperature in the discharge tube, is optimal in the correlation between self-heating and ambient temperature. Thus, the present invention relates to a single-piece fluorescent lamp and a single-piece fluorescent lamp manufacturing method in which the brightness of the lamp is maximized and mercury vapor pressure is not regulated by mercury amalgam. The present invention also includes a fluorescent lamp in which the discharge tube has at least one bent portion.
従来のU管を用いた低圧放電灯は、例えば、図6及び図7の1回折り曲げられた低圧放電灯を示す図のように構成され、U管からなる発光管1は、2つの縦方向管区分2、3及び横方向管区分4を備える。発光管1のU字形屈曲部は、横方向管区分4の外側母線MQが直線であり、かつ両方の縦方向管区分2、3の外側母線MLに対してほぼ垂直に延びるように構成されている。縦方向管区分2、3の直径DLは12mmであり、横方向管区分4の直径DQはその中央で、DQ/DLは約1.2であるように選択されるが、直径DQが直径DLと同じか又はそれより大きければよい。更に、縦方向管区分2、3と横方向管区分4との間の管移行部は、管屈曲部における直径DLQの直径DQに対する比が約1.2であるように延びている。直径DLQは直径DQより大きければよい。
A conventional low-pressure discharge lamp using a U tube is configured as shown in FIG. 6 and FIG. 7 showing a low-pressure discharge lamp bent once, and the
図8は図6、7の1回折り曲げられた低圧放電灯の温度分布を示す図で、周囲温度約25℃で測定したものである。図から、ランプ作動中の水銀蒸気圧を決定する冷たい個所は管屈曲部5及び6内に存在し、その温度はほぼ40℃である。温度は電極のある密閉端部の方向に70℃まで高まる。横方向管区分4の中央部は、冷たい個所とは異なり5℃高い45℃である。
FIG. 8 is a graph showing the temperature distribution of the low-pressure discharge lamp bent once in FIGS. 6 and 7 and measured at an ambient temperature of about 25 ° C. FIG. From the figure, the cold spot that determines the mercury vapor pressure during lamp operation is present in the
このように、外側の管屈曲部5、6における冷たい個所によりランプ作動中に最適な水銀蒸気圧が達成される。
In this way, an optimum mercury vapor pressure is achieved during lamp operation by the cold spots in the
また、U管を製作する方法として、初めに直線状のガラス管を加熱し、特に管の中央部を軟化点温度にする。次いで、中央部分から側方に延びている管部分をこれら(縦方向管部分)が相互に平行に位置するまで相互に対向させて折り曲げる。その後、U字形に折り曲げた管部分(縦方向管区分への移行部を有する横方向管部分)を型中に挿入し、それと同時に管端部を介して管中にガスを入れ加圧しながら成形する(例えば、特許文献1参照)。
従来のU管を用いた低圧放電灯は、ランプ作動中の水銀蒸気圧を決定する冷たい個所(最冷点)は管屈曲部5及び6内に存在するが、ベンディン方式(直線状のガラス管を加熱して折り曲げる)により製作するため、最冷点となる管屈曲部5及び6のガラス肉厚が他の部分に比べ薄くなり、製品として弱く破損しやすくなる。また製造不良率も高い。
In a conventional low-pressure discharge lamp using a U-tube, the cold spot (the coldest point) that determines the mercury vapor pressure during lamp operation exists in the
ガラス肉厚が、周囲温度25℃無風状態点灯時という規定測定条件下での最冷点温度を左右する。しかし、FHTと呼ばれるような屈曲管を複数用いたランプにおいては、U字形状部が3箇所あり最冷点候補は6箇所ある。最冷点のガラス肉厚が製造工程のバラツキで変化し、ランプ特性もばらついてしまうという問題点があった。 The glass wall thickness determines the coldest spot temperature under the specified measurement conditions when the ambient temperature is 25 ° C. and no wind is lit. However, in a lamp using a plurality of bent tubes called FHT, there are three U-shaped portions and six coldest spot candidates. There has been a problem that the glass thickness at the coldest point changes due to variations in the manufacturing process, and the lamp characteristics also vary.
この発明は、上記のような問題点を解決するためになされたもので、製品強度が商品として物流に耐え、製造不良率を上げず、複数ある最冷点候補の温度のバラツキが少なく安定したランプ特性が得られる片口金蛍光ランプ及び片口金蛍光ランプの製造方法を提供することを目的とする。 The present invention was made to solve the above problems, and the product strength withstands physical distribution as a product, does not increase the manufacturing defect rate, and is stable with few variations in the temperature of the coldest point candidates. An object of the present invention is to provide a single-piece fluorescent lamp capable of obtaining lamp characteristics and a method for manufacturing the single-piece fluorescent lamp.
また、この発明は、製品強度が商品として物流に耐え、製造不良率を上げず、最冷点の温度が適性になり安定したランプ特性が得られる蛍光ランプを提供することを目的とする。 Another object of the present invention is to provide a fluorescent lamp that can withstand the physical distribution of products as a product, does not increase the manufacturing defect rate, and is suitable for the temperature at the coldest point and provides stable lamp characteristics.
この発明に係る片口金蛍光ランプは、少なくとも1回以上屈曲させた放電路を有し、管内水銀蒸気圧をアマルガムで制御せずに通常の最冷点により規制し、U字形の屈曲部の角部分が最冷点になる片口金蛍光ランプにおいて、最冷点になる屈曲部の角部分のガラス肉厚をt、非屈曲部のガラス肉厚をt0としたとき、
0.12mm≦t≦t0/5
の関係を満たすことを特徴とする。
The single-ended fluorescent lamp according to the present invention has a discharge path bent at least once, regulates the mercury vapor pressure in the tube by a normal coldest point without being controlled by an amalgam, and has a corner of a U-shaped bent portion. in single base fluorescent lamp portion becomes the coldest spot, when the glass wall thickness of the corner portion of the bent portion becomes the coldest spot t, the glass wall thickness of the non-bending portion and a t 0,
0.12mm ≦ t ≦
It is characterized by satisfying the relationship.
また、この発明に係る片口金蛍光ランプは、管外径13mm以下としたことを特徴とする。 Moreover, the single-piece fluorescent lamp according to the present invention is characterized by having a tube outer diameter of 13 mm or less.
この発明に係る片口金蛍光ランプの製造方法は、請求項1記載の片口金蛍光ランプの製造方法において、U字形の屈曲部を、接合方式により形成したことを特徴とする。
The method for manufacturing a single-piece fluorescent lamp according to the present invention is characterized in that, in the single-piece fluorescent lamp manufacturing method according to
この発明に係る蛍光ランプは、放電管が少なくとも1箇所以上屈曲部を有し、管内水銀蒸気圧をアマルガムで制御せずに通常の最冷点により規制し、屈曲部が最冷点になる蛍光ランプにおいて、最冷点になる屈曲部のガラス肉厚をt、非屈曲部のガラス肉厚をt0としたとき、
0.12mm≦t≦t0/5
の関係を満たすことを特徴とする。
In the fluorescent lamp according to the present invention, the discharge tube has at least one bent portion, the mercury vapor pressure in the tube is regulated by the normal coldest point without being controlled by the amalgam, and the bent portion becomes the coldest point. In the lamp, when the glass thickness of the bent portion that becomes the coldest point is t and the glass thickness of the non-bent portion is t 0 ,
0.12mm ≦ t ≦
It is characterized by satisfying the relationship.
この発明に係る片口金蛍光ランプは、上記のように構成することにより、製品強度が商品として物流に耐え、製造不良率を上げず、複数ある最冷点候補の温度のバラツキが少なく安定したランプ特性が得られる。 The single-cap fluorescent lamp according to the present invention is configured as described above, so that the product strength can withstand physical distribution as a product, the manufacturing defect rate is not increased, and there are few variations in the temperature of the coldest point candidates, and the lamp is stable. Characteristics are obtained.
この発明に係る片口金蛍光ランプの製造方法は、上記のように構成することにより、屈曲部の成形が容易になる。 The manufacturing method of the single-piece fluorescent lamp according to the present invention is configured as described above, whereby the bent portion can be easily formed.
この発明に係る蛍光ランプは、上記のように構成することにより、製品強度が商品として物流に耐え、製造不良率を上げず、最冷点の温度が適性になり安定したランプ特性が得られる蛍光ランプを提供することができる。 The fluorescent lamp according to the present invention is configured as described above, so that the product strength can withstand physical distribution as a product, the manufacturing defect rate is not increased, the temperature at the coldest point is appropriate, and stable lamp characteristics are obtained. A lamp can be provided.
実施の形態1.
図1〜5は実施の形態1を示す図で、図1は片口金蛍光ランプの構成を示す図、図2は1つのU管の部分断面図、図3は屈曲部の角部のガラス肉厚と最冷点温度との関係を示す図、図4は低圧水銀蒸気放電片口金蛍光ランプFHT57−Hタイプの周囲温度特性(比光束、口金上側)を示す図である。
1 to 5 are
発明者らは製造バラツキの中で、際だって周囲温度特性の異なるランプがあることを発見した。このランプは温度特性が高温側にシフトしていた。発明者らは製品の特性バラツキを抑制するためにその原因を探究したところ、ある屈曲部の角の肉厚が極端に薄いことに気付いた。つまり最冷点とは単純にディメンジョンにより放電路から離れれば温度が下がるだけではなく、ガラス肉厚によって大きく左右されていることに気付いた。 The inventors have found that among the manufacturing variations, there are lamps with markedly different ambient temperature characteristics. This lamp had a temperature characteristic shifted to a high temperature side. The inventors have investigated the cause in order to suppress variations in product characteristics, and have found that the thickness of a corner of a certain bent portion is extremely thin. In other words, the coldest spot is not only that the temperature drops if the distance from the discharge path simply due to the dimension, but also that it is greatly influenced by the thickness of the glass.
片口金蛍光ランプ(形名FHT57EX−N)の全体構成は、図1に示すように、従来のものと同様である。但し、発光管1は3個のU管を用い、それぞれのU管は2つの縦方向管区分2、3及び横方向管区分4を備える。U管の管外径は12mmである。
但し、U管の管外径は12mmに限定されるものではない。本実施の形態はそれよりも太い管径のものにも適用可能である。
As shown in FIG. 1, the entire structure of the single-piece fluorescent lamp (model name FHT57EX-N) is the same as the conventional one. However, the
However, the tube outer diameter of the U tube is not limited to 12 mm. This embodiment can also be applied to a tube having a larger diameter.
図2の部分断面図に示すように、管屈曲部5、6(屈曲部の角部分)の最冷部ガラス肉厚を、商品として物流に耐える製品強度が得られるように、また製造工程不良率を上げないようにするため0.12mm以上とし、かつ最冷部ガラス肉厚を通常部(非屈曲部)のガラス肉厚の1/5以下とする。これにより、設計通りのランプ特性が得られる。0.12mmは、これ以上薄くすると製品として弱く破損しやすくなり、また製造不良率も高くなる。
従って、最冷点になる屈曲部の角部分のガラス肉厚をt、非屈曲部のガラス肉厚をt0としたとき、
0.12mm≦t≦t0/5
の関係を満たすことで、製品強度が商品として物流に耐え、製造不良率を上げず、複数ある最冷点候補の温度のバラツキが少なく安定したランプ特性が得られるのである。
As shown in the partial cross-sectional view of FIG. 2, the coldest glass thickness of the
Therefore, when the glass thickness of the corner portion of the bent portion that becomes the coldest point is t and the glass thickness of the non-bent portion is t 0 ,
0.12mm ≦ t ≦
By satisfying the above relationship, the product strength can withstand physical distribution as a product, the manufacturing defect rate is not increased, and a plurality of coldest spot candidate temperature variations are small and stable lamp characteristics can be obtained.
図3に最冷点のガラス肉厚の異なるランプについて、最冷点温度を、周囲温度25℃において測定した結果を示す。ここで用いた片口金蛍光ランプ(形名FHT57EX−N)のガラス管の肉厚t0は1.2mmである。 FIG. 3 shows the results of measuring the coldest spot temperature at an ambient temperature of 25 ° C. for lamps having different glass thicknesses at the coldest spot. The wall thickness t 0 of the glass tube of the single-piece fluorescent lamp (model name FHT57EX-N) used here is 1.2 mm.
最冷点(屈曲部の角部分)のガラス肉厚tが、例えば従来の0.3mm(t0/4)のものでは、最冷点温度が57℃である。それよりガラス肉厚tが薄くなると、0.2mm(t0/6)のものは最冷点温度が従来のものより3℃下がって54℃、0.15mmのものは最冷点温度が従来のものより5℃下がって52℃となる。
Glass thickness t of the coldest point (corner portions of the bent portion) is, for example, those of the conventional 0.3 mm (t 0/4), which is the
図4に示すように、低圧水銀蒸気放電片口金蛍光ランプFHT57−Hタイプの周囲温度特性(比光束、口金上側)によれば、最冷点温度が52℃において比光束が最大となる。従って、周囲温度25℃において、最冷点温度が52℃になるようにランプの設計を行うことになるが、最冷点となる屈曲部の角部分のガラス肉厚tを、0.12mm≦t≦t0/5の範囲で薄くすることがそれを実現する有力な手段となる。 As shown in FIG. 4, according to the ambient temperature characteristics of the low-pressure mercury vapor discharge single-neck fluorescent lamp FHT57-H type (specific luminous flux, upper part of the metallic base), the specific luminous flux becomes maximum at the coldest spot temperature of 52 ° C. Therefore, the lamp is designed so that the coldest spot temperature is 52 ° C at an ambient temperature of 25 ° C. The glass thickness t at the corner of the bent portion that becomes the coldest point is 0.12 mm ≦ be made thin in the range of t ≦ t 0/5 becomes a powerful means of achieving it.
本実施の形態によれば、少なくとも1回以上U字形に曲げた放電路を有し、管内水銀蒸気圧をアマルガムで制御せずに通常の最冷点により規制し、U字形の屈曲部の角部分が最冷点になる片口金蛍光ランプ(形名FHT57EX−N)において、最冷点になる屈曲部の角部分のガラス肉厚をt、非屈曲部のガラス肉厚をt0としたとき、
0.12mm≦t≦t0/5
の関係を満たす構成とすることにより、製品強度が商品として物流に耐え、製造不良率を上げず、複数ある最冷点候補の温度のバラツキが少なく安定したランプ特性が得られる。
According to this embodiment, it has a discharge path bent into a U-shape at least once, and the mercury vapor pressure in the tube is regulated by a normal cold spot without being controlled by an amalgam, and the corner of the U-shaped bent portion parts in the single base fluorescent lamp comprising a coldest point (model FHT57EX-N), when the glass wall thickness of the corner portion of the bent portion becomes the coldest spot t, the glass wall thickness of the non-bending portion was t 0 ,
0.12mm ≦ t ≦
By satisfying this relationship, the product strength can withstand physical distribution as a product, the manufacturing defect rate is not increased, and there are few variations in temperature of a plurality of coldest spot candidates, and stable lamp characteristics can be obtained.
実施の形態2.
図5は実施の形態2を示す図で、接合方式によりU管を製作する場合の概略フローを示す図である。
ガラス管は、外径が12mm、肉厚0.75mm(最大1.0mm)の直線状のものを2本用いて、1つのU管を作成する。先ず、直線状のガラス管のそれぞれの一方の端部近傍をバーナーで加熱して溶融し、その溶融した部分を接触させてU形状とし、更にU形状部を加熱した後、型にはめ込みU管の開口部から不活性ガスを流し込み、加圧しながらモールドして所望の形状に成形する。
FIG. 5 is a diagram showing the second embodiment, and is a diagram showing a schematic flow when a U-tube is manufactured by a joining method.
One U-tube is created by using two glass tubes having an outer diameter of 12 mm and a wall thickness of 0.75 mm (maximum 1.0 mm). First, the vicinity of one end of each linear glass tube is heated and melted with a burner, the melted portion is brought into contact with each other to form a U shape, the U shape portion is further heated, and then fitted into a mold. An inert gas is poured from the opening, and molding is performed while applying pressure to form a desired shape.
この場合も、屈曲部の角部のガラス肉厚は、実施の形態1と同様、最冷点になる屈曲部の角部分のガラス肉厚をt、非屈曲部のガラス肉厚をt0としたとき、
0.12mm≦t≦t0/5
の関係を満たす構成とする。
Also in this case, the glass thickness at the corner of the bent portion is the same as in the first embodiment, where t is the glass thickness of the corner portion of the bent portion that becomes the coldest point, and t 0 is the glass thickness of the non-bent portion. When
0.12mm ≦ t ≦
It is set as the structure which satisfy | fills this relationship.
但し、非屈曲部のガラス肉厚t0が、例えば0.75mmの場合は、最冷点になる屈曲部の角部分のガラス肉厚tの好ましい範囲は、例えば0.12mm≦t≦0.15mmとなる。 However, the glass wall thickness t 0 of the non-bending portion, for example, in the case of 0.75 mm, the preferred range of the glass wall thickness t of the corner portion of the bent portion becomes the coldest point, for example, 0.12 mm ≦ t ≦ 0. 15 mm.
接合方式でU管を製作する場合は、モールド成形が容易になる利点を有する。 When the U pipe is manufactured by the joining method, there is an advantage that molding is easy.
上記実施の形態1、2では、U字形の屈曲部を有するものを説明したが、屈曲部はU字形に限定されない。例えば、コ字形等でもよい。要は片口金の場合はほぼ180度屈曲したものであれば、どのような形状でもよい。 In the first and second embodiments, the U-shaped bent portion is described, but the bent portion is not limited to the U-shape. For example, a U-shape may be used. In short, in the case of a single base, any shape may be used as long as it is bent by approximately 180 degrees.
また、上記実施の形態1、2では、片口金蛍光ランプについて説明したが、片口金以外の蛍光ランプにも適用可能であり、例えば放電管が少なくとも1箇所以上屈曲部を有し、管内水銀蒸気圧をアマルガムで制御せずに通常の最冷点により規制し、屈曲部が最冷点になる蛍光ランプにおいても、最冷点になる屈曲部のガラス肉厚をt、非屈曲部のガラス肉厚をt0としたとき、
0.12mm≦t≦t0/5
の関係を満たすことにより、製品強度が商品として物流に耐え、製造不良率を上げず、最冷点の温度が適性になり安定したランプ特性が得られる蛍光ランプを提供することができる。
In the first and second embodiments, the single-end fluorescent lamp has been described. However, the present invention can also be applied to fluorescent lamps other than the single-end base. For example, the discharge tube has at least one bent portion, and the mercury vapor in the tube Even in a fluorescent lamp in which the pressure is regulated by the normal coldest point without being controlled by an amalgam and the bent part is the coldest point, the glass thickness of the bent part that becomes the coldest point is t, and the glass meat of the non-bent part When the thickness is t 0
0.12mm ≦ t ≦
By satisfying the above relationship, it is possible to provide a fluorescent lamp in which the product strength can withstand physical distribution as a product, the manufacturing defect rate is not increased, the temperature at the coldest point is appropriate, and stable lamp characteristics can be obtained.
1 発光管、2,3 縦方向管区分、4 横方向管区分、5,6 管屈曲部。 1 Arc tube, 2, 3 Longitudinal tube section, 4 Transverse tube section, 5, 6 Tube bending part.
Claims (4)
前記最冷点になる屈曲部の角部分のガラス肉厚をt、非屈曲部のガラス肉厚をt0としたとき、
0.12mm≦t≦t0/5
の関係を満たすことを特徴とする片口金蛍光ランプ。 In a one-necked fluorescent lamp having a discharge path bent at least once, the mercury vapor pressure in the tube is regulated by the normal coldest point without being controlled by an amalgam, and the corner portion of the bent part is the coldest point ,
When the glass thickness of the corner portion of the bent portion that becomes the coldest point is t, and the glass thickness of the non-bent portion is t 0 ,
0.12mm ≦ t ≦ t 0/5
A single-piece fluorescent lamp characterized by satisfying the above relationship.
前記U字形の屈曲部を、接合方式により形成したことを特徴とする片口金蛍光ランプの製造方法。 In the manufacturing method of the single cap fluorescent lamp of Claim 1,
A method of manufacturing a single-piece fluorescent lamp, wherein the U-shaped bent portion is formed by a joining method.
前記最冷点になる屈曲部のガラス肉厚をt、非屈曲部のガラス肉厚をt0としたとき、
0.12mm≦t≦t0/5
の関係を満たすことを特徴とする蛍光ランプ。 In the fluorescent lamp in which the discharge tube has at least one bent portion, the mercury vapor pressure in the tube is regulated by the normal coldest point without being controlled by the amalgam, and the bent portion becomes the coldest point,
When the glass thickness of the bent portion that becomes the coldest point is t and the glass thickness of the non-bent portion is t 0 ,
0.12mm ≦ t ≦ t 0/5
A fluorescent lamp characterized by satisfying the above relationship.
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JP2009038046A (en) * | 2008-11-20 | 2009-02-19 | Osram-Melco Ltd | U-pipe and fluorescent lamp |
JP2009064788A (en) * | 2008-11-20 | 2009-03-26 | Osram-Melco Ltd | U-tube and fluorescent lamp |
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JP2009038046A (en) * | 2008-11-20 | 2009-02-19 | Osram-Melco Ltd | U-pipe and fluorescent lamp |
JP2009064788A (en) * | 2008-11-20 | 2009-03-26 | Osram-Melco Ltd | U-tube and fluorescent lamp |
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