JP2009117396A - Single base fluorescent lamp and manufacturing method of same - Google Patents
Single base fluorescent lamp and manufacturing method of same Download PDFInfo
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- JP2009117396A JP2009117396A JP2009048374A JP2009048374A JP2009117396A JP 2009117396 A JP2009117396 A JP 2009117396A JP 2009048374 A JP2009048374 A JP 2009048374A JP 2009048374 A JP2009048374 A JP 2009048374A JP 2009117396 A JP2009117396 A JP 2009117396A
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Abstract
Description
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)。 Further, as a method of manufacturing the U tube, first, a straight glass tube is heated, and in particular, the central portion of the tube is set to a softening point temperature. Then, the tube portions extending laterally from the central portion are bent so as to face each other until they (longitudinal tube portions) are positioned parallel to each other. After that, the pipe part bent in a U-shape (transverse pipe part with a transition to the vertical pipe section) is inserted into the mold, and at the same time, gas is injected into the pipe through the pipe end and molding is performed. (For example, refer to Patent Document 1).
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 has been made to solve the above-described problems. 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, which are stable. 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。
A 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 the temperature of a plurality of coldest spot candidates is small and 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 product characteristic variations, 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 when 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, and 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 satisfies the 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 (11)
平行に延びている2個の直線状の縦方向管区分と、2個の縦方向管区分を連結する1個の横方向管区分と、前記縦方向管区分と前記横方向管区分との間の1対の屈曲部とを有する3本のU管と、
前記3本のU管の前記横方向管区分までの高さが同じになるように、3本のU管を取り付けた片口金と
を備え、
3本のU管の6箇所の屈曲部の角部分は、前記最冷点になる最冷点候補であり、前記最冷点候補のガラス肉厚を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 the one-piece base fluorescent lamp having a bent discharge path, and the corner portion of the bent portion becomes the coldest point,
Between two straight longitudinal tube sections extending in parallel, one transverse tube section connecting the two longitudinal tube sections, and between the longitudinal tube section and the transverse tube section Three U-tubes having a pair of bends,
A single base to which the three U pipes are attached so that the height of the three U pipes to the horizontal pipe section is the same.
The corner portions of the six bent portions of the three U tubes are the coldest point candidates that become the coldest point, and the glass thickness of the coldest point candidate is t, and the glass thickness of the non-bent portion is t. When 0
0.12mm ≦ t <t 0/5
A single-piece fluorescent lamp characterized by satisfying the above relationship.
前記最冷点候補は、前記3本のU管の横方向管区分で形成された前記略正三角形の各辺の途中であって、隣り合うU管の縦方向管区分の共通接線の内側に形成されたたことを特徴とする請求項1又は2記載の片口金蛍光ランプ。 The three U pipes are arranged in a single base so that a substantially equilateral triangle can be formed by a transverse pipe section of the three U pipes,
The coldest spot candidate is in the middle of each side of the substantially equilateral triangle formed by the lateral pipe sections of the three U pipes, and inside the common tangent line of the vertical pipe sections of the adjacent U pipes. The single-piece fluorescent lamp according to claim 1 or 2, wherein the single-piece fluorescent lamp is formed.
平行に延びている2個の直線状の縦方向管区分と、2個の縦方向管区分を連結する1個の横方向管区分と、前記縦方向管区分と前記横方向管区分との間の1対の屈曲部とを有する3本のU管と、
前記3本のU管の前記横方向管区分までの高さが同じになるように、3本のU管を取り付けた片口金と
を備え、
前記屈曲部は、前記縦方向管区分と前記横方向管区分とを垂直方向に連結し、
前記屈曲部の角部分は、前記U管の前記横方向管区分までの最大高さより低い位置に形成され、かつ、隣り合うU管の縦方向管区分の共通接線の内側に形成されたことを特徴とする片口金蛍光ランプ。 In the one-piece base fluorescent lamp having a bent discharge path, and the corner portion of the bent portion becomes the coldest point,
Between two straight longitudinal tube sections extending in parallel, one transverse tube section connecting the two longitudinal tube sections, and between the longitudinal tube section and the transverse tube section Three U-tubes having a pair of bends,
A single base to which the three U pipes are attached so that the height of the three U pipes to the horizontal pipe section is the same.
The bent portion connects the longitudinal tube section and the transverse tube section in a vertical direction;
The corner portion of the bent portion is formed at a position lower than the maximum height of the U pipe to the lateral pipe section, and is formed inside the common tangent line of the vertical pipe section of the adjacent U pipe. One-piece fluorescent lamp featuring the feature.
前記屈曲部は、前記縦方向管区分と前記横方向管区分とを垂直方向に連結し、
前記屈曲部の角部分の曲率半径は、前記縦方向管区分の曲率半径よりも小さいことを特徴とする請求項1から4いずれかに記載の片口金蛍光ランプ。 The longitudinal tube section has an outer diameter of 13 mm or less;
The bent portion connects the longitudinal tube section and the transverse tube section in a vertical direction;
The single-piece fluorescent lamp according to any one of claims 1 to 4, wherein a radius of curvature of a corner portion of the bent portion is smaller than a radius of curvature of the longitudinal tube section.
前記屈曲部は、屈曲部の内側のガラス面が屈曲部の外側のガラス面に接近しており、屈曲部の角部分のガラス肉厚tが0.12mm≦t<t0/5であることを特徴とする請求項1から5いずれかに記載の片口金蛍光ランプ。 The glass thickness of the longitudinal tube sections is t 0,
Said bent portion, the glass surface of the inner of the bent portion is close to the glass surface of the outer bent portion, the glass thickness t of the corner portion of the bent portion is 0.12mm ≦ t <t 0/5 The single-piece fluorescent lamp according to any one of claims 1 to 5.
U形状部を有するガラス管のU形状部を加熱し、加熱したU形状部を型にはめ込む工程と、
前記型にはめ込む工程後に、ガラス管の開口部から加圧ガスを吹き込み、加圧ガスによりU形状部を膨らませてU形状部をコ字形に成形し、コ字形の角部分に前記最冷点になる屈曲部を成形して、U管を成形する工程と、
U管を成形する工程後に、3本のU管の前記横方向管区分までの高さが同じになるように、3本のU管を片口金に取り付ける取り付け工程と
を備えたことを特徴とする片口金蛍光ランプの製造方法。 Between two straight longitudinal tube sections extending in parallel, one transverse tube section connecting the two longitudinal tube sections, and between the longitudinal tube section and the transverse tube section In the method of manufacturing a single-ended fluorescent lamp having a U-tube having a pair of bent portions, a bent discharge path, and a corner portion of the bent portion being the coldest point,
Heating the U-shaped part of the glass tube having the U-shaped part, and fitting the heated U-shaped part into a mold;
After the step of fitting into the mold, pressurized gas is blown from the opening of the glass tube, the U-shaped portion is expanded by the pressurized gas, and the U-shaped portion is formed into a U-shape, and the coldest spot is formed at the corner of the U-shape. Forming a bent portion to form a U tube;
And a mounting step of attaching three U tubes to a single base so that the height of the three U tubes to the transverse tube section is the same after the step of forming the U tubes. To manufacture a single-piece fluorescent lamp.
前記U形状部から、前記1個の横方向管区分と前記2個の縦方向管区分とが垂直方向になるように前記屈曲部をL字型に成形するとともに、L字型に成形した部分を角外部方向に膨らませることにより、前記最冷点になる角部分を成形することを特徴とする請求項9に記載の蛍光ランプの製造方法。 The step of forming the U-tube includes
From the U-shaped portion, the bent portion is formed into an L shape so that the one transverse tube section and the two longitudinal tube sections are in a vertical direction, and the portion formed into an L shape The method of manufacturing a fluorescent lamp according to claim 9, wherein the corner portion that becomes the coldest point is formed by inflating the corner portion toward the outside of the corner.
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JPH0297746U (en) * | 1989-01-17 | 1990-08-03 | ||
JPH0253906B2 (en) * | 1981-03-31 | 1990-11-20 | Patento Toroihanto G Fuyuuru Erekutoritsushe Guryuuranpen Mbh | |
JPH1097839A (en) * | 1996-08-01 | 1998-04-14 | Toshiba Lighting & Technol Corp | Electric bulb type fluorescent lamp |
JP2002075275A (en) * | 2000-08-31 | 2002-03-15 | Toshiba Lighting & Technology Corp | Low-pressure mercury vapor discharge lamp and illumination device |
JP2004055293A (en) * | 2002-07-18 | 2004-02-19 | Toshiba Lighting & Technology Corp | Compact selfballasting fluorescent lamp and lighting system |
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JPS5757055U (en) * | 1980-09-19 | 1982-04-03 | ||
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JPS6091547A (en) * | 1983-10-25 | 1985-05-22 | Mitsubishi Electric Corp | Low pressure mercury vapor discharge lamp |
JPH0297746U (en) * | 1989-01-17 | 1990-08-03 | ||
JPH1097839A (en) * | 1996-08-01 | 1998-04-14 | Toshiba Lighting & Technol Corp | Electric bulb type fluorescent lamp |
JP2002075275A (en) * | 2000-08-31 | 2002-03-15 | Toshiba Lighting & Technology Corp | Low-pressure mercury vapor discharge lamp and illumination device |
JP2004055293A (en) * | 2002-07-18 | 2004-02-19 | Toshiba Lighting & Technology Corp | Compact selfballasting fluorescent lamp and lighting system |
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