JP2004039423A - Circular fluorescent lamp - Google Patents

Circular fluorescent lamp Download PDF

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Publication number
JP2004039423A
JP2004039423A JP2002194326A JP2002194326A JP2004039423A JP 2004039423 A JP2004039423 A JP 2004039423A JP 2002194326 A JP2002194326 A JP 2002194326A JP 2002194326 A JP2002194326 A JP 2002194326A JP 2004039423 A JP2004039423 A JP 2004039423A
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JP
Japan
Prior art keywords
base
tube
ring
fluorescent lamp
groove
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2002194326A
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Japanese (ja)
Inventor
Seiji Hata
畑 誠治
Sunao Shimizu
清水 直
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP2002194326A priority Critical patent/JP2004039423A/en
Publication of JP2004039423A publication Critical patent/JP2004039423A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To obtain a circular fluorescent lamp in which breakage of an exhaust tube due to lead wire entanglement is prevented without excessive rotation of a base in the case of mounting it on an appliance. <P>SOLUTION: On the circular fluorescent lamp 1, the base 16 is mounted by covering and stepping over both end parts 4, 5 of a light emitting tube 2. At the outer peripheral face of the end part 4 of the light emitting tube 2, a groove 3 which is broken off in the direction to intersect the tube axis of the light emitting tube 2 is formed separately from a chucking groove. The base 16 is composed of a first base member 17 and a second base member 18. A pair of base members 17, 18 has a curved shape corresponding to the circular shape of the light emitting tube 2, and at the inner face of the first base member 17, a convex part 21 for preventing the excessive rotation of the base 16 mounted on the end part of the light emitting tube 2 is installed by being fitted into a groove 3 at the end part of the light emitting tube 2. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、環形蛍光ランプの口金構造に関するものである。
【0002】
【従来の技術】
近年、環形蛍光ランプとして、例えば管外径が16mmという細形発光管からなるいわゆるT5タイプの環形蛍光ランプが開発・展開されている。これは、管外径が29mmの従来のT8タイプと比べて、細管化のほかにランプ効率も改善された省資源・省エネの環形蛍光ランプであり、これからの普及が期待されている。
【0003】
上記T5タイプの環形蛍光ランプにおいて、発光管の構成は、管外径が異なるほかは、基本的に従来のT8タイプと同様である。すなわち、発光管は、容器が環形にベンディング成形加工されたガラス管からなり、管両端部のそれぞれにタングステンフィラメントコイル電極を保持した一対のリード線が気密封止されている。ここで、管両端部の少なくともいずれかには、発光管の排気管が前記一対のリード線に隣接して封着されている。そして、管内表面の主要部には蛍光体が塗布され、管内には水銀と緩衝ガスとしてのアルゴン等の希ガスが封入されている。
【0004】
一方、完成ランプは、発光管端部にいわゆる図7,図8に示すようにGZ10qタイプの環形蛍光ランプ用の口金(口金部材23,24)が併合されて装着される。ここで、口金の構成も、形状寸法こそ異なるほかは、基本的に従来のT8タイプ用のG10q口金と略同様である。すなわち、それぞれ樹脂部材からなる第一の口金部材および第二の口金部材が環形発光管の管両端部を覆うように、管両端部を跨いで一体化して設けられている。一対の口金部材23,24はそれぞれ発光管の環形状に相応して湾曲された形状をなしており、特に一方の第一の口金部材23には、発光管の前記4本のリード線がそれぞれ接続されるピン状の接続端子が設けられている。また、一対の口金部材は、ランプ組立において嵌合あるいはビス止めにより一体に組立てられている。
【0005】
なお、上記T5タイプの環形蛍光ランプは、通常電子安定器により点灯される。
【0006】
【発明が解決しようとする課題】
このような環形蛍光ランプにおいては、ランプ取り付けの際、排気管が破損し、ランプ不良に至るものが存在している。この原因を調査した結果、特にT5発光管のように細形化されているものにおいては、ランプを器具に取り付ける際、口金が発光管端部において、発光管周りに過度に回転(試験ランプにおいては最大約半回転)してしまうため、発光管端部のリード線が隣接する排気管に絡まり、排気管が破断応力を受けるためであることがわかった。
【0007】
本発明は、器具への取り付けの際、過度に口金が回転することなく、リード線絡みによる排気管破損を防止することのできる環形蛍光ランプを得ることを目的とする。
【0008】
【課題を解決するための手段】
本発明の環形蛍光ランプは、内部に一対の電極を有する環形発光管と、前記環形発光管の両端部を跨いで設けられた前記環形発光管の環形状に相応して湾曲した口金とを有する環形蛍光ランプにおいて、前記口金の回転範囲を所定角度に規定する手段として、前記環形発光管の端部の周面に、前記環形発光管の管軸と交差する方向に延び、かつ所定の長さで途切れた溝を有するとともに、前記口金の内面に凸部を有し、前記凸部が前記溝と嵌合して設けられた構成を有する。
【0009】
これにより、口金が発光管周りに過度に回転しようとしても、溝と凸部とが接触し所定角度以上に回転することがなくなるので、器具等への取り付けの際、過度に口金が回転することを防止でき、リード線絡みによる排気管破損を防止することができる。
【0010】
【発明の実施の形態】
図1に示すように本発明の第1の実施の形態である環形蛍光ランプ1は、管外径が16mmからなるT5タイプの環形蛍光ランプであり、発光管2は、直状ガラス管を環形にベンディング成形加工したガラス管からなり、管端部4,5にはガラスステム6,7がそれぞれ気密封着されている。
【0011】
図1,図2,図3に示すように、発光管2の管端部4,5には、タングステンフィラメントコイル電極8,9を保持した一対のリード線10a,10b,11a(図示せず),11bがそれぞれ気密封止され、外部リード線10c,10d,11c,11dとして導出されている。
【0012】
電極8,9が気密封止された発光管2の端部の少なくともいずれか、例えば管端部4には、発光管排気用で管外径4.4mmの排気管12(但し、排気でチップオフ後の長さ約8mm)が一対のリード線10c,10dに隣接して設けられている。
【0013】
管内表面の主要部には蛍光体13が塗布され、管内には水銀14と緩衝ガスとしてのアルゴン等の希ガス15が封入されている。完成した環形蛍光ランプ1は、発光管2の管端部4,5を覆いかつ跨いで、いわゆるGZ10qタイプのT5環形蛍光ランプ用の口金16が装着されている。なお、口金16は後述のように二つの口金部材が併合して形成されるが、図1においては口金16の内部構造を説明するため一方の口金部材は図示していない。
【0014】
現行T5タイプとしては、13形、20形、27形、34形及び41形の5品種が市販されており、これらの環外径はそれぞれ151mm,225mm,299mm,373mmおよび447mmである。
【0015】
発光管2の管端部4の外周面には、チャッキング溝とは別に、発光管2の管軸と交差する方向に長さ12.5mm、深さ1.0mm、幅4.0mmの途切れた溝3が形成されている。すなわち、溝3はいわゆるチャッキング用の溝22とは異なり全周に渡って設けられていない。
【0016】
口金16は、図4,図5,図6に示すように、発光管2の管端部4,5を部分的に覆いかつ跨いで併合して設けられるよう、樹脂部材からなる第一の口金部材17および第二の口金部材18からなる。一対の口金部材17,18は発光管2の環形状に相応して湾曲された形状を有し、第一の口金部材17には、発光管2のリード線10c,10d,11c,11dが接続されるピン状の接続端子19a,19b,20a,20bが設けられている。また第一の口金部材17の内面には、発光管2の管端部4に設けられている溝3に嵌合されることによって、発光管2の端部に装着した口金16が過度に回転するのを防止するための凸部21が設けられている。
【0017】
溝3は、発光管2の端部の外周長の4分の1の長さを有することが好ましく、この長さを採ることによって、例えば上下45°、つまり90°の範囲で口金の回転範囲を規制することができる。溝3の長さについては、本発明を用いる環形蛍光ランプのタイプによって異なるが、口金16の回転によるリード線10c,10d,11c,11dの排気管12への絡まりを防止できる長さを考慮し適宜決定する必要がある。
【0018】
口金16の具体的な形状寸法(第一の口金部材および第二の口金部材を一体に組み立てたもの)は、内径17mmおよび外径19mm、環外周長約50mm、内周長約41.5mmとしている。ここで、口金16の内径を発光管2の外径16mmに対して17mmと比較的大きく設定したのは、実際の環形蛍光ランプ1での管外径のばらつきに対して裕度を持たせるためである。そして、一対の口金部材17,18は、ランプ組立において嵌合あるいはビス止めにより併合され一体に組立てられている。
【0019】
本実施形態にかかる口金16の凸部21として、例えば発光管端部4の周面に設けられた溝3が、長さ12.5mm、深さ1.0mm、開口幅4mmの三角形状の横断面をなして成形されている場合には、底辺幅6.0mmで高さ1.2mmの半球状をなすものを形成した。これにより、溝3と凸部21とがストッパーの役目をして口金16の発光管2周りの回転を回転角度で90°以下に抑制でき、過剰に口金16が回転してしまうことを防止でき、環形蛍光ランプ1のソケット取付時などにおける排気管破損を確実に防止できる。ここで、口金16の回転を抑制できたのは、発光管端部4の溝3に嵌合する凸部21が形成されたほかに、もともと口金16を構成する一対の口金部材17,18が発光管2の環形状に相応して湾曲した形状を有しているからである。なお、口金16は器具(図示せず)との適合性の問題で、ある程度裕度をもって回転することを要求されるため、凸部21と溝3の寸法はそれを勘案する必要がある。したがって、本実施形態において、凸部21と溝3との寸法が、きつくはまりこむ寸法であると当然ながら口金16の裕度ある回転は防止されてしまうので、裕度を持った寸法を採用することが好ましい。
【0020】
また、本実施形態においては、発光管端部4側の溝3に凸部21が嵌合するようにしたが、他方の発光管端部5側に溝とこの溝に嵌合する凸部(図示せず)を嵌合するように形成してもよい。また、それぞれの端部において相対向する端部の周面位置に溝と凸部とを形成してもよい。
【0021】
【発明の効果】
以上のように本発明によれば、器具等への取り付けの際、過度に口金が回転することを防止でき、このため、リード線絡みによる排気管破損を防止することのできる環形蛍光ランプを提供することができる。
【図面の簡単な説明】
【図1】本発明の第1の実施の形態である環形蛍光ランプの一部切欠正面図
【図2】同じく発光管端部の正面図
【図3】同じく発光管端部の一部切欠側面図
【図4】同じく第一の口金部材の正面図
【図5】同じく第二の口金部材の正面図
【図6】同じく発光管端部に口金が装着された構造を説明するための図
【図7】従来の口金部材の正面図
【図8】従来の口金部材の正面図
【符号の説明】
1 環形蛍光ランプ
2 発光管
3 溝
4,5  発光管端部
16 口金
17 第一の口金部材
18 第二の口金部材
21 凸部
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a base structure of a ring-shaped fluorescent lamp.
[0002]
[Prior art]
In recent years, as a ring-shaped fluorescent lamp, for example, a so-called T5 type ring-shaped fluorescent lamp including a thin arc tube having an outer diameter of 16 mm has been developed and developed. This is a resource-saving and energy-saving ring-shaped fluorescent lamp in which, besides the conventional T8 type having a tube outer diameter of 29 mm, the lamp efficiency has been improved in addition to the thinner tube, and it is expected to spread in the future.
[0003]
In the T5 type annular fluorescent lamp, the configuration of the arc tube is basically the same as the conventional T8 type except that the tube outer diameter is different. That is, the arc tube is formed of a glass tube in which a container is formed into a ring-shaped bending process, and a pair of lead wires holding a tungsten filament coil electrode are hermetically sealed at both ends of the tube. Here, an exhaust pipe of a light emitting tube is sealed to at least one of both ends of the tube so as to be adjacent to the pair of lead wires. A fluorescent material is applied to a main portion of the inner surface of the tube, and mercury and a rare gas such as argon as a buffer gas are sealed in the tube.
[0004]
On the other hand, the completed lamp is provided with a base (base members 23, 24) for a GZ10q type annular fluorescent lamp combined with the base end of the arc tube, as shown in FIGS. Here, the configuration of the base is basically the same as the conventional G10q base for the T8 type except that the shape and dimensions are different. That is, the first base member and the second base member, each of which is made of a resin member, are integrally provided over both ends of the annular arc tube so as to cover both ends of the tube. Each of the pair of base members 23 and 24 has a curved shape corresponding to the ring shape of the arc tube. In particular, the first lead member 23 has the four lead wires of the arc tube respectively. A pin-shaped connection terminal to be connected is provided. Further, the pair of base members are integrally assembled by fitting or screwing in lamp assembly.
[0005]
The T5 type annular fluorescent lamp is usually turned on by an electronic ballast.
[0006]
[Problems to be solved by the invention]
In such ring-shaped fluorescent lamps, there are some which break the exhaust pipe at the time of mounting the lamp and lead to lamp failure. As a result of investigating the cause, particularly when the lamp is attached to the fixture, the base is excessively rotated around the arc tube at the end of the arc tube (especially in a test lamp) when the lamp is attached to a fixture. It has been found that this is because the lead wire at the arc tube end is entangled with the adjacent exhaust pipe, and the exhaust pipe receives a breaking stress.
[0007]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a ring-shaped fluorescent lamp capable of preventing the exhaust pipe from being damaged due to the entanglement of the lead wire without excessively rotating the base when the lamp is mounted on an appliance.
[0008]
[Means for Solving the Problems]
The ring-shaped fluorescent lamp of the present invention has a ring-shaped arc tube having a pair of electrodes inside, and a base curved across the both ends of the ring-shaped arc tube and corresponding to the ring shape of the ring-shaped arc tube. In the ring-shaped fluorescent lamp, as means for defining the rotation range of the base at a predetermined angle, the ring-shaped light emitting tube extends on a peripheral surface of an end portion thereof in a direction intersecting the tube axis of the ring-shaped light emitting tube, and has a predetermined length. And a convex portion on the inner surface of the base, and the convex portion is provided so as to be fitted with the groove.
[0009]
As a result, even if the base tries to rotate around the arc tube excessively, the groove and the projection will not contact and will not rotate more than a predetermined angle. Can be prevented, and the exhaust pipe can be prevented from being damaged due to the entanglement of the lead wire.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
As shown in FIG. 1, a ring-shaped fluorescent lamp 1 according to a first embodiment of the present invention is a T5 type ring-shaped fluorescent lamp having an outer diameter of 16 mm, and an arc tube 2 is a ring-shaped straight glass tube. And glass stems 6 and 7 are hermetically sealed to tube ends 4 and 5, respectively.
[0011]
As shown in FIGS. 1, 2 and 3, a pair of lead wires 10a, 10b and 11a (not shown) holding tungsten filament coil electrodes 8 and 9 are provided at the tube ends 4 and 5 of the arc tube 2. , 11b are hermetically sealed and led out as external lead wires 10c, 10d, 11c, 11d.
[0012]
At least one of the ends of the arc tube 2 in which the electrodes 8 and 9 are hermetically sealed, for example, a tube end 4 is provided with an exhaust tube 12 for exhausting the arc tube and having a tube outer diameter of 4.4 mm (however, a The length after turning off is about 8 mm) is provided adjacent to the pair of lead wires 10c and 10d.
[0013]
A phosphor 13 is applied to a main portion of the inner surface of the tube, and a mercury 14 and a rare gas 15 such as argon as a buffer gas are sealed in the tube. The completed annular fluorescent lamp 1 is provided with a base 16 for a so-called GZ10q type T5 annular fluorescent lamp, covering and straddling the tube ends 4 and 5 of the arc tube 2. Although the base 16 is formed by combining two base members as described later, one base member is not shown in FIG. 1 to explain the internal structure of the base 16.
[0014]
As the current T5 type, five types, namely, types 13, 20, 27, 34, and 41 are commercially available, and their outer diameters are 151 mm, 225 mm, 299 mm, 373 mm, and 447 mm, respectively.
[0015]
On the outer peripheral surface of the tube end 4 of the arc tube 2, apart from the chucking groove, a length of 12.5 mm, a depth of 1.0 mm, and a width of 4.0 mm in a direction intersecting with the tube axis of the arc tube 2. Groove 3 is formed. That is, the groove 3 is not provided over the entire circumference unlike the so-called chucking groove 22.
[0016]
As shown in FIGS. 4, 5, and 6, the base 16 is a first base made of a resin member so as to partially cover the tube ends 4 and 5 of the arc tube 2 and to be provided so as to be joined together. It comprises a member 17 and a second base member 18. The pair of base members 17 and 18 have a curved shape corresponding to the ring shape of the arc tube 2, and the lead wires 10 c, 10 d, 11 c and 11 d of the arc tube 2 are connected to the first base member 17. Provided are pin-shaped connection terminals 19a, 19b, 20a, and 20b. The inner surface of the first base member 17 is fitted into the groove 3 provided at the tube end 4 of the arc tube 2, so that the base 16 attached to the end of the arc tube 2 rotates excessively. The protrusion 21 is provided to prevent the occurrence of the deformation.
[0017]
The groove 3 preferably has a length of one-fourth of the outer peripheral length of the end of the arc tube 2, and by adopting this length, for example, the rotation range of the base is 45 ° up and down, that is, 90 °. Can be regulated. Although the length of the groove 3 varies depending on the type of the annular fluorescent lamp using the present invention, it is taken into consideration that the lead wire 10c, 10d, 11c, 11d can be prevented from being entangled with the exhaust pipe 12 due to the rotation of the base 16. It has to be determined appropriately.
[0018]
The specific shape and size of the base 16 (the first base member and the second base member are integrally assembled) are as follows: an inner diameter of 17 mm, an outer diameter of 19 mm, a ring outer circumference of about 50 mm, and an inner circumference of about 41.5 mm. I have. Here, the reason why the inner diameter of the base 16 is set relatively large at 17 mm with respect to the outer diameter of 16 mm of the arc tube 2 is to provide a margin for variations in the outer diameter of the tube in the actual annular fluorescent lamp 1. It is. The pair of base members 17 and 18 are assembled together by fitting or screwing in lamp assembly.
[0019]
As the protrusion 21 of the base 16 according to the present embodiment, for example, a groove 3 provided on the peripheral surface of the arc tube end 4 has a triangular cross section having a length of 12.5 mm, a depth of 1.0 mm, and an opening width of 4 mm. When molded in a plane, a hemisphere having a bottom width of 6.0 mm and a height of 1.2 mm was formed. As a result, the groove 3 and the projection 21 function as a stopper, so that the rotation of the base 16 around the arc tube 2 can be suppressed to a rotation angle of 90 ° or less, and the base 16 can be prevented from rotating excessively. In addition, it is possible to reliably prevent the exhaust pipe from being damaged when the annular fluorescent lamp 1 is mounted on a socket. Here, the rotation of the base 16 was suppressed because, in addition to the formation of the convex portion 21 that fits into the groove 3 of the arc tube end 4, the pair of base members 17 and 18 that originally constituted the base 16 were formed. This is because the arc tube 2 has a curved shape corresponding to the ring shape. The base 16 is required to rotate with some allowance due to the problem of compatibility with a device (not shown), and the dimensions of the protrusion 21 and the groove 3 need to take this into consideration. Therefore, in the present embodiment, if the dimensions of the protrusion 21 and the groove 3 are tightly fitted dimensions, it is natural that the cap 16 is prevented from rotating with a certain margin, so a dimension having a margin is adopted. Is preferred.
[0020]
In the present embodiment, the protrusion 21 is fitted into the groove 3 on the arc tube end 4 side, but the groove and the protrusion ( (Not shown). In addition, a groove and a protrusion may be formed at the peripheral surface positions of the opposite ends at each end.
[0021]
【The invention's effect】
As described above, according to the present invention, it is possible to provide a ring-shaped fluorescent lamp that can prevent the base from being excessively rotated at the time of attachment to an instrument or the like, and thus can prevent breakage of the exhaust pipe due to lead wire entanglement. can do.
[Brief description of the drawings]
FIG. 1 is a partially cutaway front view of an annular fluorescent lamp according to a first embodiment of the present invention; FIG. 2 is a front view of an arc tube end; FIG. FIG. 4 is a front view of the first base member. FIG. 5 is a front view of the second base member. FIG. 6 is a view for explaining a structure in which a base is attached to the end of the arc tube. FIG. 7 is a front view of a conventional base member. FIG. 8 is a front view of a conventional base member.
REFERENCE SIGNS LIST 1 ring-shaped fluorescent lamp 2 arc tube 3 groove 4, 5 arc tube end 16 base 17 first base member 18 second base member 21 convex part

Claims (2)

内部に一対の電極を有する環形発光管と、前記環形発光管の両端部を跨いで設けられた前記環形発光管の環形状に相応して湾曲した口金とを有する環形蛍光ランプにおいて、前記口金の回転範囲を所定角度に規定する手段として、前記環形発光管の端部の周面に、前記環形発光管の管軸と交差する方向に延び、かつ所定の長さで途切れた溝を有するとともに、前記口金の内面に凸部を有し、前記凸部が前記溝と嵌合して設けられていることを特徴とする環形蛍光ランプ。A ring-shaped fluorescent lamp having a ring-shaped luminous tube having a pair of electrodes therein and a base curved across the annular shape of the ring-shaped luminous tube provided across both ends of the ring-shaped luminous tube; As means for defining the rotation range at a predetermined angle, the peripheral surface of the end portion of the ring-shaped arc tube has a groove extending in a direction intersecting the tube axis of the ring-shaped arc tube and interrupted by a predetermined length, A ring-shaped fluorescent lamp having a convex portion on an inner surface of the base, wherein the convex portion is provided so as to fit with the groove. 前記溝は、前記環形発光管端部における外周長の4分の1の長さを有することを特徴とする請求項1記載の環形蛍光ランプ。2. The ring-shaped fluorescent lamp according to claim 1, wherein the groove has a length one-fourth of an outer peripheral length at an end of the ring-shaped arc tube.
JP2002194326A 2002-07-03 2002-07-03 Circular fluorescent lamp Pending JP2004039423A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006033325A1 (en) * 2004-09-24 2006-03-30 Toshiba Lighting & Technology Corporation Circular fluorescent lamp and lighting appratus
KR101757504B1 (en) * 2010-06-28 2017-07-12 가부시키가이샤 야쿠르트 혼샤 Skin properties improving agent for oral administration

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006033325A1 (en) * 2004-09-24 2006-03-30 Toshiba Lighting & Technology Corporation Circular fluorescent lamp and lighting appratus
KR101757504B1 (en) * 2010-06-28 2017-07-12 가부시키가이샤 야쿠르트 혼샤 Skin properties improving agent for oral administration

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