JPH08236075A - Ring-shaped fluorescent lamp - Google Patents
Ring-shaped fluorescent lampInfo
- Publication number
- JPH08236075A JPH08236075A JP33061495A JP33061495A JPH08236075A JP H08236075 A JPH08236075 A JP H08236075A JP 33061495 A JP33061495 A JP 33061495A JP 33061495 A JP33061495 A JP 33061495A JP H08236075 A JPH08236075 A JP H08236075A
- Authority
- JP
- Japan
- Prior art keywords
- ring
- shaped
- fluorescent lamp
- shaped arc
- arc tube
- 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.)
- Granted
Links
Landscapes
- Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、複数本の環形発光
管を同心円状に配置した環形蛍光ランプに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ring-shaped fluorescent lamp in which a plurality of ring-shaped arc tubes are concentrically arranged.
【0002】[0002]
【従来の技術】従来、住宅照明を中心として環形蛍光ラ
ンプが広く用いられている。特に、高出力を得るため
に、2本以上の個々の環形蛍光ランプを段違いに配置し
たものが使用されており、また、このような環形蛍光ラ
ンプは専用の照明器具に取り付けて使用されている。従
って、このような照明器具は厚形で大形のものとなるた
め、経済的ではなく、しかも器具デザインの面からも自
由度が制約されるなどの問題点を有していた。さらに、
2本以上の環形蛍光ランプと同等の高出力が得られる環
形蛍光ランプ1本を使用した場合にも、環形蛍光ランプ
自身が大型化すると共に、照明器具も大型化してしま
い、経済面、デザイン面で上記と同様の問題が生じる。2. Description of the Related Art Conventionally, ring-shaped fluorescent lamps have been widely used mainly for residential lighting. In particular, in order to obtain high output, one in which two or more individual ring-shaped fluorescent lamps are arranged in different stages is used, and such ring-shaped fluorescent lamps are used by being attached to a dedicated lighting fixture. . Therefore, since such a lighting fixture becomes thick and large, it is not economical and has a problem that the degree of freedom is restricted in terms of the design of the fixture. further,
Even if one ring-shaped fluorescent lamp, which can provide the same high output as two or more ring-shaped fluorescent lamps, is used, the ring-shaped fluorescent lamp itself becomes large and the lighting equipment also becomes large, which is economical and design. Then, the same problem as described above occurs.
【0003】[0003]
【発明が解決しようとする課題】上記のような従来の環
形蛍光ランプの問題点を解決するために、2本のコンパ
クトなガラス製の環形発光管を同一平面上でかつ同心円
状に配置し、それぞれの環形発光管をガラス管からなる
ブリッジ接合部によって相互に接合して、内部に一本の
放電路を形成した環形蛍光ランプが提案されている(特
開平2−61956号公報、特開平6−203798号
公報)。本発明者等は、これらの環形蛍光ランプについ
て種々検討を加えた。その結果、このような環形蛍光ラ
ンプでは、ランプ形状がコンパクトである上に、このラ
ンプは比較的高負荷で点灯されるため、必然的に水銀蒸
気圧を決定する発光管内の最冷点温度が最適温度領域で
ある40〜50℃よりも上昇してしまい、ランプ光束が
蛍光ランプとして本来実現可能な最大値よりも低下して
しまうという問題点があった。In order to solve the above-mentioned problems of the conventional annular fluorescent lamp, two compact glass annular arc tubes are arranged on the same plane and concentrically, A ring-shaped fluorescent lamp has been proposed in which each ring-shaped arc tube is bonded to each other by a bridge-bonded part made of a glass tube to form one discharge path therein (Japanese Patent Laid-Open Nos. 2-61956 and 6-6). -203798). The present inventors have made various studies on these ring-shaped fluorescent lamps. As a result, in such a ring-shaped fluorescent lamp, the lamp shape is compact, and since the lamp is lit at a relatively high load, the coldest spot temperature in the arc tube that determines the mercury vapor pressure is inevitable. There is a problem that the temperature rises above the optimum temperature range of 40 to 50 ° C. and the luminous flux of the lamp falls below the maximum value that can be originally realized as a fluorescent lamp.
【0004】本発明は、従来技術における前記課題を解
決するため、ランプ光束を高く維持することができると
共に、コンパクトで高効率・高出力な環形蛍光ランプを
提供することを目的とする。In order to solve the above problems in the prior art, it is an object of the present invention to provide a ring-shaped fluorescent lamp which is capable of maintaining a high luminous flux of the lamp and which is compact and has high efficiency and high output.
【0005】[0005]
【課題を解決するための手段】前記目的を達成するた
め、本発明に係る環形蛍光ランプの第1の構成は、一端
部に電極を有し、他端部に閉塞部を有する複数本の環形
発光管が同心円状に配置され、前記複数本の環形発光管
の他端部近傍がブリッジ接合部によって接合されて、内
部に一本の放電路が形成されると共に、前記他端部に最
冷点箇所が形成された環形蛍光ランプであって、前記ブ
リッジ接合部の端部から前記他端部の端面中央部までの
距離をL(mm)、前記環形発光管の管外径をd(m
m)としたとき、0.5d≦L≦1.3dなる関係を満
足することを特徴とする。In order to achieve the above object, a first structure of a ring-shaped fluorescent lamp according to the present invention has a plurality of ring-shaped fluorescent lamps having an electrode at one end and a closed portion at the other end. The arc tubes are arranged concentrically, and the vicinity of the other ends of the plurality of ring-shaped arc tubes are joined by a bridge joint to form one discharge path inside and the other end is cooled at the lowest temperature. A ring-shaped fluorescent lamp having spots formed therein, wherein a distance from an end of the bridge joint to a center of an end face of the other end is L (mm), and an outer diameter of the ring-shaped arc tube is d (m).
m), the relationship of 0.5d ≦ L ≦ 1.3d is satisfied.
【0006】また、前記本発明の第1の構成において
は、複数本の環形発光管が同一平面上に配置されている
のが好ましい。また、前記本発明の第1の構成において
は、環形発光管の両端部の外壁面に湾曲用保持部が設け
られているのが好ましい。また、この場合には、環形発
光管の少なくとも非電極側他端部の湾曲用保持部よりも
先端側の内壁面に溝部が設けられているのが好ましい。In the first structure of the present invention, it is preferable that a plurality of ring-shaped arc tubes are arranged on the same plane. Further, in the first configuration of the present invention, it is preferable that the curved holding portions are provided on the outer wall surfaces of both ends of the ring-shaped arc tube. Further, in this case, it is preferable that at least the groove portion is provided on the inner wall surface of the ring-shaped arc tube at the tip end side of the bending holding portion at the other end portion on the non-electrode side.
【0007】また、前記本発明の第1の構成において
は、環形発光管の非電極側他端部がステムによって封止
されているのか好ましい。また、本発明に係る環形蛍光
ランプの第2の構成は、一端部に電極を有し、他端部に
閉塞部を有する複数本の環形発光管が同心円状に配置さ
れ、前記複数本の環形発光管の他端部近傍がブリッジ接
合部によって接合されて、内部に一本の放電路が形成さ
れると共に、前記他端部に最冷点箇所が形成され、か
つ、前記一端部と前記他端部のうち少なくとも一方を包
囲する口金が備わった環形蛍光ランプであって、前記最
冷点箇所が外気に触れていることを特徴とする。In the first structure of the present invention, it is preferable that the other end of the ring-shaped arc tube on the non-electrode side is sealed by a stem. A second configuration of the ring-shaped fluorescent lamp according to the present invention is such that a plurality of ring-shaped arc tubes, each having an electrode at one end and a closed part at the other end, are concentrically arranged, The vicinity of the other end of the arc tube is joined by a bridge joint to form a single discharge path inside, a coldest spot is formed at the other end, and the one end and the other A ring-shaped fluorescent lamp having a base that surrounds at least one of the ends, wherein the coldest spot is in contact with the outside air.
【0008】また、前記本発明の第2の構成において
は、複数本の環形発光管が同一平面上に配置されている
のが好ましい。また、前記本発明の第2の構成において
は、ブリッジ接合部の端部から他端部の端面中央部まで
の距離をL(mm)、環形発光管の管外径をd(mm)
としたとき、0.5d≦L≦1.3dなる関係を満足す
るのが好ましい。In the second structure of the present invention, it is preferable that a plurality of ring-shaped arc tubes are arranged on the same plane. In the second configuration of the present invention, the distance from the end of the bridge joint to the center of the end face of the other end is L (mm), and the outer diameter of the ring-shaped arc tube is d (mm).
Then, it is preferable to satisfy the relationship of 0.5d ≦ L ≦ 1.3d.
【0009】また、前記本発明の第2の構成において
は、口金が、他端部の最冷点箇所と離間して設けられて
いるのが好ましい。また、前記本発明の第2の構成にお
いては、口金が、一端部と他端部の最冷点箇所とを包囲
して設けられ、かつ、前記口金に、前記最冷点箇所を外
気に触れさせる通気口が設けられているのが好ましい。Further, in the above-mentioned second structure of the present invention, it is preferable that the base is provided so as to be separated from the coldest spot of the other end. Further, in the second configuration of the present invention, a mouthpiece is provided so as to surround one end portion and the coldest spot location of the other end, and the mouthpiece is exposed to the outside air. It is preferable that a ventilation hole is provided.
【0010】また、前記本発明の第2の構成において
は、最冷点箇所が複数本の環形発光管のうち外側に位置
する環形発光管に形成されているのが好ましい。また、
前記本発明の第2の構成においては、環形発光管の両端
部の外壁面に湾曲用保持部が設けられているのが好まし
い。また、この場合には、環形発光管の少なくとも非電
極側他端部の湾曲用保持部よりも先端側の内壁面に溝部
が設けられているのが好ましい。In the second structure of the present invention, it is preferable that the coldest spot is formed on the outer ring-shaped arc tube of the plurality of ring-shaped arc tubes. Also,
In the second configuration of the present invention, it is preferable that the curved holding portions are provided on the outer wall surfaces of both ends of the ring-shaped arc tube. Further, in this case, it is preferable that at least the groove portion is provided on the inner wall surface of the ring-shaped arc tube at the tip end side of the bending holding portion at the other end portion on the non-electrode side.
【0011】また、前記本発明の第2の構成において
は、環形発光管の非電極側他端部がステムによって封止
されているのが好ましい。また、本発明に係る環形蛍光
ランプの第3の構成は、一端部に電極を有し、他端部に
閉塞部を有する複数本の環形発光管が同心円状に配置さ
れ、前記複数本の環形発光管の他端部近傍がブリッジ接
合部によって接合されて、内部に一本の放電路が形成さ
れると共に、前記他端部に最冷点箇所が形成され、か
つ、前記一端部と前記他端部のうち少なくとも一方を包
囲する口金が備わった環形蛍光ランプであって、前記口
金に、前記環形発光管の前記一端部と前記他端部とを熱
遮蔽する熱遮蔽部材が設けられたことを特徴とする。In the second structure of the present invention, it is preferable that the other end of the ring-shaped arc tube on the non-electrode side is sealed by a stem. The third configuration of the ring-shaped fluorescent lamp according to the present invention is such that a plurality of ring-shaped arc tubes having an electrode at one end and a closed part at the other end are concentrically arranged, The vicinity of the other end of the arc tube is joined by a bridge joint to form a single discharge path inside, a coldest spot is formed at the other end, and the one end and the other A ring-shaped fluorescent lamp having a base that surrounds at least one of the ends, wherein the base is provided with a heat-shielding member that thermally shields the one end and the other end of the ring-shaped arc tube. Is characterized by.
【0012】また、前記本発明の第3の構成において
は、複数本の環形発光管が同一平面上に配置されている
のが好ましい。また、前記本発明の第3の構成において
は、ブリッジ接合部の端部から他端部の端面中央部まで
の距離をL(mm)、環形発光管の管外径をd(mm)
としたとき、0.5d≦L≦1.3dなる関係を満足す
るのが好ましい。In the third structure of the present invention, it is preferable that a plurality of ring-shaped arc tubes are arranged on the same plane. In the third configuration of the present invention, the distance from the end of the bridge joint to the center of the end face of the other end is L (mm), and the outer diameter of the ring-shaped arc tube is d (mm).
Then, it is preferable to satisfy the relationship of 0.5d ≦ L ≦ 1.3d.
【0013】また、前記本発明の第3の構成において
は、口金が、一端部と他端部の最冷点箇所とを包囲して
設けられ、かつ、前記口金に、前記最冷点箇所を外気に
触れさせる通気口が設けられているのが好ましい。In the third structure of the present invention, the die is provided so as to surround one end portion and the coldest spot portion of the other end portion, and the coldest spot portion is provided on the die. It is preferable that a vent hole is provided to allow the air to come into contact with the outside air.
【0014】また、前記本発明の第3の構成において
は、環形発光管の両端部の外壁面に湾曲用保持部が設け
られているのが好ましい。また、この場合には、環形発
光管の少なくとも非電極側他端部の湾曲用保持部よりも
先端側の内壁面に溝部が設けられているのが好ましい。In the third aspect of the present invention, it is preferable that the curved holding portions are provided on the outer wall surfaces of both ends of the ring-shaped arc tube. Further, in this case, it is preferable that at least the groove portion is provided on the inner wall surface of the ring-shaped arc tube at the tip end side of the bending holding portion at the other end portion on the non-electrode side.
【0015】また、前記本発明の第3の構成において
は、環形発光管の非電極側他端部がステムによって封止
されているのが好ましい。また、本発明に係る環形蛍光
ランプの第4の構成は、一端部に電極を有し、他端部に
ステムによって封止された閉塞部を有する複数本の環形
発光管が同一平面上に同心円状に配置され、前記複数本
の環形発光管の他端部近傍がブリッジ接合部によって接
合されて、内部に一本の放電路が形成されると共に、前
記他端部に最冷点箇所が形成された環形蛍光ランプであ
って、ブリッジ接合部の端部から前記他端部の端面中央
部までの距離をL(mm)、前記環形発光管の管外径を
d(mm)としたとき、0.5d≦L≦1.3dなる関
係を満足しており、前記一端部と前記他端部とを包囲す
る口金が設けられ、前記口金には、前記最冷点箇所を外
気に触れさせる通気口が設けられ、かつ、前記環形発光
管の前記一端部と前記他端部とを熱遮蔽する熱遮蔽部材
が設けられたことを特徴とする。In the third structure of the present invention, it is preferable that the other end of the ring-shaped arc tube on the non-electrode side is sealed by a stem. In the fourth configuration of the ring-shaped fluorescent lamp according to the present invention, a plurality of ring-shaped arc tubes each having an electrode at one end and a closing part sealed by a stem at the other end are concentric on the same plane. Are arranged in a circular shape, the vicinity of the other ends of the plurality of ring-shaped arc tubes are joined by a bridge joint, and one discharge path is formed inside, and the coldest spot is formed at the other end. When the distance from the end of the bridge junction to the center of the end face of the other end is L (mm) and the outer diameter of the ring arc tube is d (mm), 0.5d ≦ L ≦ 1.3d is satisfied, and a mouthpiece surrounding the one end portion and the other end portion is provided, and the mouthpiece is ventilated to expose the coldest spot location to the outside air. A mouth is provided and heat shields the one end and the other end of the ring-shaped arc tube. Wherein the shield member is provided.
【0016】[0016]
【発明の実施の形態】前記本発明の第1の構成によれ
ば、一端部に電極を有し、他端部に閉塞部を有する複数
本の環形発光管が同心円状に配置され、前記複数本の環
形発光管の他端部近傍がブリッジ接合部によって接合さ
れて、内部に一本の放電路が形成されると共に、前記他
端部に最冷点箇所が形成された環形蛍光ランプであっ
て、前記ブリッジ接合部の端部から前記他端部の端面中
央部までの距離をL(mm)、前記環形発光管の管外径
をd(mm)としたとき、0.5d≦L≦1.3dなる
関係を満足することを特徴とするので、最冷点箇所の温
度を、発光管内の水銀蒸気圧が最適となる領域に保つこ
とができ、ランプ光束の最大値を容易に得ることができ
る。According to the first aspect of the present invention, a plurality of ring-shaped arc tubes having an electrode at one end and a closing portion at the other end are arranged concentrically, and A ring-shaped fluorescent lamp in which the vicinity of the other end of the ring-shaped arc tube is joined by a bridge joint to form one discharge path inside and the coldest spot is formed at the other end. When the distance from the end of the bridge joint to the center of the end face of the other end is L (mm) and the outer diameter of the annular arc tube is d (mm), 0.5d ≦ L ≦ Since the characteristic of 1.3d is satisfied, the temperature of the coldest spot can be maintained in the region where the mercury vapor pressure in the arc tube is optimum, and the maximum value of the lamp luminous flux can be easily obtained. You can
【0017】また、前記本発明の第1の構成において、
複数本の環形発光管が同一平面上に配置されているとい
う好ましい例によれば、照明器具を薄形にすることがで
きる。Further, in the first configuration of the present invention,
According to the preferable example in which the plurality of ring-shaped arc tubes are arranged on the same plane, the lighting fixture can be made thin.
【0018】また、前記本発明の第1の構成において、
環形発光管の両端部の外壁面に湾曲用保持部が設けられ
ているという好ましい例によれば、ランプ製造工程にお
いて環形発光管の湾曲用保持部をしっかりと保持するこ
とができるので、環形発光管の曲げ精度を高めることが
できる。また、この場合、環形発光管の少なくとも非電
極側他端部の湾曲用保持部よりも先端側の内壁面に溝部
が設けられているという好ましい例によれば、溝部に最
冷点箇所が形成され、その温度を最適値に保つことがで
きる。Further, in the first configuration of the present invention,
According to the preferable example in which the curved holding portions are provided on the outer wall surfaces of both ends of the ring-shaped arc tube, the curved holding portions of the ring-shaped arc tube can be firmly held in the lamp manufacturing process. The bending accuracy of the pipe can be improved. Further, in this case, according to a preferable example in which the groove portion is provided on the inner wall surface of the annular arc tube at least on the other end portion on the non-electrode side on the tip side of the holding portion for bending, the coldest spot is formed on the groove portion. Therefore, the temperature can be maintained at the optimum value.
【0019】また、前記本発明の第1の構成において、
環形発光管の非電極側他端部がステムによって封止され
ているという好ましい例によれば、従来構造の場合に比
べて非電極側他端部の強度が向上する。従来構造の場合
には、発光管の一部を溶かして端部を形成するので、特
に管径の大きな発光管では非電極側他端部の肉厚が薄く
なってしまう。これに対し、ステムによって封止する場
合には、端部を強固に封止することができると共に、発
光管の曲げ加工時やランプ完成後の端部の割れ等の不都
合を解消することができる。また、ステムによって封止
する場合には、従来構造の場合に比べて製造が比較的容
易であり、従来の製造設備を使用して製造することがで
きる。In addition, in the first configuration of the present invention,
According to the preferable example in which the other end of the ring-shaped arc tube on the non-electrode side is sealed by the stem, the strength of the other end on the non-electrode side is improved as compared with the case of the conventional structure. In the case of the conventional structure, since the end portion is formed by melting a part of the arc tube, the thickness of the other end portion on the non-electrode side becomes thin especially in the arc tube having a large tube diameter. On the other hand, in the case of sealing with the stem, the end can be firmly sealed, and inconveniences such as bending of the arc tube and cracking of the end after completion of the lamp can be eliminated. . Further, in the case of sealing with the stem, the manufacturing is relatively easy as compared with the case of the conventional structure, and the manufacturing can be performed using the conventional manufacturing equipment.
【0020】また、前記本発明の第2の構成によれば、
一端部に電極を有し、他端部に閉塞部を有する複数本の
環形発光管が同心円状に配置され、前記複数本の環形発
光管の他端部近傍がブリッジ接合部によって接合され
て、内部に一本の放電路が形成されると共に、前記他端
部に最冷点箇所が形成され、かつ、前記一端部と前記他
端部のうち少なくとも一方を包囲する口金が備わった環
形蛍光ランプであって、前記最冷点箇所が外気に触れて
いることを特徴とするので、電極の熱がブリッジ接合部
側端部へ伝わって最冷点箇所の温度を最適領域から過度
に上昇させることはない。その結果、ランプ光束が低下
するのを防止することができる。According to the second aspect of the present invention,
A plurality of ring-shaped arc tubes having an electrode at one end and a closed portion at the other end are arranged concentrically, and the other ends of the plurality of ring-shaped arc tubes are joined by a bridge joint portion, A ring-shaped fluorescent lamp having a discharge path formed therein, a coldest spot formed at the other end, and a base surrounding at least one of the one end and the other end. It is characterized in that the coldest spot is exposed to the outside air, so that the heat of the electrode is transferred to the end portion on the side of the bridge junction to raise the temperature of the coldest spot excessively from the optimum region. There is no. As a result, it is possible to prevent the luminous flux of the lamp from decreasing.
【0021】また、前記本発明の第2の構成において、
口金が、他端部の最冷点箇所と離間して設けられている
という好ましい例によれば、最冷点箇所が外気に触れた
状態を作り出すことができる。In the second structure of the present invention,
According to a preferable example in which the base is provided separately from the coldest spot of the other end, it is possible to create a state where the coldest spot is in contact with the outside air.
【0022】また、前記本発明の第2の構成において、
口金が、一端部と他端部の最冷点箇所とを包囲して設け
られ、かつ、前記口金に、前記最冷点箇所を外気に触れ
させる通気口が設けられているという好ましい例によれ
ば、複数本の環形発光管を安定に保持した状態で、最冷
点箇所が外気に触れた状態を作り出すことができる。Further, in the above-mentioned second structure of the present invention,
According to a preferred example in which the mouthpiece is provided so as to surround one end portion and the coldest spot location of the other end portion, and the mouthpiece is provided with a vent hole for exposing the coldest spot location to the outside air. For example, it is possible to create a state where the coldest spot is in contact with the outside air while stably holding a plurality of ring-shaped arc tubes.
【0023】また、前記本発明の第2の構成において、
最冷点箇所が複数本の環形発光管のうち外側に位置する
環形発光管に形成されているという好ましい例によれ
ば、発光管端部の非発光面積を小さくして、高い光束値
を得ることができる。In the second structure of the present invention,
According to a preferred example in which the coldest spot is formed on the outer ring-shaped arc tube of the plurality of ring-shaped arc tubes, the non-luminous area at the end of the arc tube is reduced to obtain a high luminous flux value. be able to.
【0024】また、前記本発明の第3の構成によれば、
一端部に電極を有し、他端部に閉塞部を有する複数本の
環形発光管が同心円状に配置され、前記複数本の環形発
光管の他端部近傍がブリッジ接合部によって接合され
て、内部に一本の放電路が形成されると共に、前記他端
部に最冷点箇所が形成され、かつ、前記一端部と前記他
端部のうち少なくとも一方を包囲する口金が備わった環
形蛍光ランプであって、前記口金に、前記環形発光管の
前記一端部と前記他端部とを熱遮蔽する熱遮蔽部材が設
けられたことを特徴とするので、電極から最冷点箇所へ
の熱の伝わりを抑制することができる。その結果、最冷
点箇所の温度が最適領域から過度に上昇するのを防止す
ることができるので、ランプ光束が低下するのを防止す
ることができる。According to the third aspect of the present invention,
A plurality of ring-shaped arc tubes having an electrode at one end and a closed portion at the other end are arranged concentrically, and the other ends of the plurality of ring-shaped arc tubes are joined by a bridge joint portion, A ring-shaped fluorescent lamp having a discharge path formed therein, a coldest spot formed at the other end, and a base surrounding at least one of the one end and the other end. It is characterized in that the base is provided with a heat shielding member that thermally shields the one end and the other end of the ring-shaped arc tube, so that heat from the electrode to the coldest spot is Transmission can be suppressed. As a result, it is possible to prevent the temperature at the coldest spot from rising excessively from the optimum region, so that it is possible to prevent the luminous flux of the lamp from decreasing.
【0025】[0025]
【実施例】以下、実施例を用いて本発明をさらに具体的
に説明する。 〈第1の実施例〉図1は本発明に係る環形蛍光ランプの
第1の実施例を示す一部切り欠き正面図、図2は図1の
環形蛍光ランプのブリッジ接合部周辺の構造を示す一部
切り欠き正面図である。図1、図2に示すように、ガラ
ス製の2本の環形発光管1、2は同一平面上でかつ同心
円状に配置されており、環形発光管1、2のそれぞれの
一端部には電極3、4が取り付けられている。また、環
形発光管1、2の他端部11、12はそれぞれ閉塞され
ている。環形発光管1、2の他端部11、12の近傍
は、ガラス管からなるブリッジ接合部5によって接合さ
れており、これにより発光管内部の電極3、4間に一本
の放電路が形成されている。発光管1、2の内表面には
希土類蛍光体6が塗布されており、環形発光管1、2内
には水銀と始動補助用ガス及び緩衝ガスとしてのアルゴ
ン、ネオンなどの希ガス(200〜500Pa)が封入
されている。尚、水銀は亜鉛−水銀などのアマルガム合
金として封入してもよい。EXAMPLES The present invention will be described in more detail below with reference to examples. <First Embodiment> FIG. 1 is a partially cutaway front view showing a first embodiment of a ring-shaped fluorescent lamp according to the present invention, and FIG. 2 shows a structure around a bridge joint portion of the ring-shaped fluorescent lamp of FIG. It is a partially notched front view. As shown in FIG. 1 and FIG. 2, two glass ring-shaped arc tubes 1 and 2 are arranged on the same plane and concentrically, and an electrode is provided at one end of each of the ring-shaped arc tubes 1 and 2. 3 and 4 are attached. The other ends 11 and 12 of the ring-shaped arc tubes 1 and 2 are closed. The vicinity of the other ends 11 and 12 of the ring-shaped arc tubes 1 and 2 are joined by a bridge joint 5 made of a glass tube, whereby a discharge path is formed between the electrodes 3 and 4 inside the arc tube. Has been done. The inner surface of the arc tubes 1 and 2 is coated with a rare earth phosphor 6, and the ring-shaped arc tubes 1 and 2 contain mercury and a rare gas such as argon and neon as a starting gas and a buffer gas (200 to 200). 500 Pa) is enclosed. The mercury may be enclosed as an amalgam alloy such as zinc-mercury.
【0026】本実施例の環形蛍光ランプは、環形発光管
1、2の管外径dがそれぞれ14mm、外側に位置する
環形発光管1の環外径が150mm、内側に位置する環
形発光管2の環内径が90mmとコンパクトな形状をし
ており、ランプ入力25Wで点灯するように設計されて
いる。In the ring-shaped fluorescent lamp of this embodiment, the ring-shaped arc tubes 1 and 2 each have an outer diameter d of 14 mm, the outer ring-shaped arc tube 1 has an outer ring diameter of 150 mm, and the inner ring-shaped arc tube 2 has an outer ring diameter d of 150 mm. It has a compact ring inner diameter of 90 mm and is designed to be lit with a lamp input of 25 W.
【0027】ブリッジ接合部5の端部から環形発光管
1、2の他端部11、12の端面中央部までの距離Lは
それぞれ13mmであり、また、内側に位置する環形発
光管2の両端部間の中心間距離l′は18mmである。
この環形蛍光ランプを、50kHzのインバータ回路を
用いてランプ入力25Wで点灯させたところ、色温度3
000ケルビンの発光色で1490lmという高い光束
値が得られた。また、環形発光管1、2の温度を測定し
たところ、他端部11、12に最冷点箇所が形成されて
おり、最冷点箇所の温度は、25W点灯時(室温25
℃)においてほぼ最大光束値が得られる最適水銀蒸気圧
に相当する45℃であった。さらに、種々検討を加えた
結果、環形発光管1、2の管外径をdとして、ブリッジ
接合部5の端部から環形発光管1、2の他端部11、1
2の端面中央部までの距離Lを、0.5d≦L≦1.3
dの範囲に設定することにより、最冷点箇所の温度を、
発光管内の水銀蒸気圧が最適となる領域に保つことがで
き、ランプ光束の最大値を容易に得ることができた。The distance L from the end of the bridge joint portion 5 to the center of the end faces of the other ends 11 and 12 of the ring-shaped arc tubes 1 and 2 is 13 mm, and both ends of the ring-shaped arc tube 2 located inside. The center-to-center distance l'between the parts is 18 mm.
When this ring-shaped fluorescent lamp was lit with a lamp input of 25 W using an inverter circuit of 50 kHz, the color temperature was 3
A luminous flux value as high as 1490 lm was obtained with an emission color of 000 Kelvin. When the temperatures of the ring-shaped arc tubes 1 and 2 were measured, the coldest spots were formed at the other end portions 11 and 12, and the temperature of the coldest spots was 25 W at the time of lighting (room temperature 25
(° C) was 45 ° C, which is equivalent to the optimum mercury vapor pressure at which the maximum luminous flux value was obtained. Furthermore, as a result of various studies, the outer diameters of the ring-shaped arc tubes 1 and 2 are set to d, and the end portions of the bridge joint portion 5 are connected to the other ends 11 and 1 of the ring-shaped arc tubes 1 and 2.
2 the distance L to the center of the end face is 0.5d ≦ L ≦ 1.3
By setting in the range of d, the temperature of the coldest spot is
It was possible to keep the mercury vapor pressure in the arc tube in an optimum region, and it was possible to easily obtain the maximum value of the luminous flux of the lamp.
【0028】〈第2の実施例〉本実施例では、上記第1
の実施例の環形蛍光ランプに口金を取り付けた環形蛍光
ランプについて説明する。<Second Embodiment> In the present embodiment, the above-mentioned first embodiment is used.
The ring-shaped fluorescent lamp in which the base is attached to the ring-shaped fluorescent lamp of the embodiment will be described.
【0029】まず、図3に示すように、環形発光管1、
2の両端部全体を、従来と同様の口金28を用いて包囲
した環形蛍光ランプを作製し、ランプの諸特性を測定し
た。その結果、このようなランプでは、口金を有さない
裸ランプの場合に比べて、光束値が1490lmから1
260lmへ著しく低下することが分かった。このよう
に光束値が著しく低下するのは、最冷点箇所の温度、つ
まり、管内水銀蒸気圧が最適領域から過度に上昇するた
めである。First, as shown in FIG. 3, the ring-shaped arc tube 1,
A ring-shaped fluorescent lamp was manufactured by surrounding both ends of No. 2 with a base 28 similar to the conventional one, and various characteristics of the lamp were measured. As a result, such a lamp has a luminous flux value of 1490 lm to 1 as compared with a bare lamp having no base.
It was found to be significantly reduced to 260 lm. The reason why the luminous flux value is remarkably lowered is that the temperature of the coldest spot, that is, the mercury vapor pressure in the tube rises excessively from the optimum region.
【0030】本発明者等は、上記の結果に基づき、口金
29によって環形発光管1、2の一端部(電極3、4
側)を包囲し、他端部(最冷点箇所)11、12を口金
29から離間して、外気に触れさせた環形蛍光ランプ
(図4)と、環形発光管1、2の一端部(電極3、4
側)及び他端部11、12が通気口10を有する口金3
0によって包囲され、口金30の通気口10によって他
端部11、12が外気と触れている環形蛍光ランプ(図
5)とを作製した。これらの環形蛍光ランプの光束値
は、図4に示すのもので1575lm、図5に示すもの
で1520lmであり、口金を設けない状態の裸ランプ
の光束値に非常に近いものであった。このようにランプ
光束の低下が抑えられたのは、電極3、4の熱が他端部
11、12に伝わって最冷点箇所の温度を最適領域から
過度に上昇させることがないからである。Based on the above results, the inventors of the present invention, based on the above results, use the base 29 to make one end (electrodes 3, 4) of the ring-shaped arc tubes 1, 2.
Side) and the other ends (the coldest spots) 11 and 12 are separated from the base 29 to expose the ring-shaped fluorescent lamp (FIG. 4) to the outside air, and one ends of the ring-shaped arc tubes 1 and 2 ( Electrodes 3, 4
(Side) and the other ends 11 and 12 have a vent 3 having a vent 10.
A ring-shaped fluorescent lamp (FIG. 5) which was surrounded by 0 and whose other ends 11 and 12 were in contact with the outside air by the vent hole 10 of the base 30 was manufactured. The luminous flux values of these ring-shaped fluorescent lamps were 1575 lm as shown in FIG. 4 and 1520 lm as shown in FIG. 5, which were very close to the luminous flux values of the bare lamp without the base. The reason why the decrease in the lamp luminous flux is suppressed is that the heat of the electrodes 3 and 4 is not transferred to the other ends 11 and 12 and the temperature of the coldest spot is not excessively increased from the optimum region. .
【0031】〈第3の実施例〉本実施例においては、定
格電力60Wの環形蛍光ランプについて説明する。本実
施例の環形蛍光ランプは、基本的に上記第1の実施例と
同様の構造(図1、図2)を有している。そして、この
環形蛍光ランプは、図4と同様に、口金29によって環
形発光管1、2の一端部(電極3、4側)が包囲され、
他端部(最冷点箇所)11、12が口金29から離間し
て、外気に触れた状態となっている。<Third Embodiment> In this embodiment, a ring type fluorescent lamp having a rated power of 60 W will be described. The ring-shaped fluorescent lamp of this embodiment basically has the same structure as that of the first embodiment (FIGS. 1 and 2). Then, in this ring-shaped fluorescent lamp, as in the case of FIG. 4, one end of the ring-shaped arc tubes 1 and 2 (on the side of the electrodes 3 and 4) is surrounded by the base 29,
The other ends (the coldest spots) 11 and 12 are separated from the mouthpiece 29 and are in a state of being in contact with the outside air.
【0032】本実施例の環形蛍光ランプの各寸法は、環
形発光管1、2の管外径が20mm、外側に位置する環
形発光管1の環外径が240mm、内側に位置する環形
発光管2の環内径が155mm、ブリッジ接合部5の端
部から他端部11、12の端面中央部までの距離Lが1
9mm、環形発光管2の両端部の中心間距離lが22m
mである。このランプを50kHzのインバータ回路を
用いてランプ入力60Wで点灯させたところ、4390
lmという高い光束値が得られた。The respective dimensions of the ring-shaped fluorescent lamp of this embodiment are as follows: the ring-shaped arc tubes 1 and 2 have an outer diameter of 20 mm, the outer ring-shaped arc tube 1 has an outer diameter of 240 mm and an inner ring-shaped arc tube. The ring inner diameter of 2 is 155 mm, and the distance L from the end of the bridge joint portion 5 to the center of the end faces of the other end portions 11 and 12 is 1
9 mm, center-to-center distance l of both ends of the ring-shaped arc tube 2 is 22 m
m. When this lamp was lit with a lamp input of 60 W using an inverter circuit of 50 kHz, 4390
A high luminous flux value of lm was obtained.
【0033】本実施例の環形蛍光ランプの口金として、
図3に示すような従来の口金28を用い、この口金28
によって環形発光管1、2の両端部全体を包囲した構造
に関してさらに検討を加えた。その結果、環形発光管
1、2の両端部全体を口金によって包囲する場合であっ
ても、図6に示すような、環形発光管1、2の一端部
(電極3、4側)と他端部11、12とを熱遮蔽する熱
遮蔽部材である熱遮蔽用隔壁16を設けた口金31を用
いれば、環形発光管1、2の一端部(電極3、4側)か
ら最冷点箇所(他端部11、12)への熱の伝わりを抑
制して、最冷点箇所の温度が最適領域から過度に上昇す
るのを防止することができるので、ランプ光束が低下す
るのを防止することができる。具体的数値を挙げれば、
図3の口金28を用いた場合の光束値は1260lmで
あったが、熱遮蔽用隔壁16を設けた口金31を用いた
場合の光束値は1420lmであった。また、同様の熱
遮蔽効果は、図5の通気口10を設けた口金30に関し
ても得られることが分かった。具体的数値を挙げれば、
通気口10を設けただけの口金30を用いた場合の光束
値は上記したように1520lmであったが、さらに熱
遮蔽用隔壁を設けた場合の光束値は1560lm(40
lm向上)であった。As the base of the ring-shaped fluorescent lamp of this embodiment,
Using a conventional base 28 as shown in FIG.
Further studies were made on the structure in which both ends of the ring-shaped arc tubes 1 and 2 are surrounded by. As a result, even when the entire ends of the ring-shaped arc tubes 1 and 2 are surrounded by the bases, one end (electrodes 3 and 4 side) and the other end of the ring-shaped arc tubes 1 and 2 as shown in FIG. If the base 31 provided with the heat-shielding partition wall 16 that is a heat-shielding member that thermally shields the portions 11 and 12 is used, the coldest spot (from the one end (electrodes 3 and 4 side) of the ring-shaped arc tubes 1 and 2 ( It is possible to prevent the temperature of the coldest spot from rising excessively from the optimum region by suppressing the transfer of heat to the other end portions 11 and 12), so that the luminous flux of the lamp is prevented from decreasing. You can Given the specific numbers,
The light flux value when the base 28 of FIG. 3 was used was 1260 lm, but the light flux value when the base 31 provided with the heat shielding partition 16 was used was 1420 lm. Further, it has been found that the similar heat shielding effect can be obtained also for the base 30 provided with the vent hole 10 of FIG. Given the specific numbers,
The luminous flux value was 1520 lm as described above when the base 30 having only the vent holes 10 was used, but the luminous flux value was 1560 lm (40
lm improvement).
【0034】〈第4の実施例〉図7は本発明に係る環形
蛍光ランプの第4の実施例のブリッジ接合部周辺の構造
の一例を示す正面図、図8は本発明に係る環形蛍光ラン
プの第4の実施例のブリッジ接合部周辺の構造の他の例
を示す正面図である。<Fourth Embodiment> FIG. 7 is a front view showing an example of a structure around a bridge joint portion of a fourth embodiment of a ring type fluorescent lamp according to the present invention, and FIG. 8 is a ring type fluorescent lamp according to the present invention. It is a front view which shows the other example of the structure of the bridge junction part periphery of the 4th Example of this.
【0035】本実施例では、図7、図8に示すように、
環形発光管1、2の他端部11、12のいずれか一方を
外部に露出させる口金32、33を用いて環形蛍光ラン
プを作製し、露出させた方の他端部11(又は12)に
最冷点箇所を形成した。この場合にも、図4の口金29
を用いた場合と同様の光束値が得られた。特に、発光管
端部の非発光面積を小さくして、高い光束値を得ること
ができることから、図7に示すように、外側に位置する
環形発光管1の他端部11に最冷点箇所を設ける方が好
ましい。In this embodiment, as shown in FIGS.
A ring-shaped fluorescent lamp is produced using the bases 32 and 33 that expose one of the other ends 11 and 12 of the ring-shaped arc tubes 1 and 2 to the outside, and the other end 11 (or 12) of the exposed one is The coldest spot was formed. Also in this case, the base 29 of FIG.
A luminous flux value similar to that obtained by using was obtained. In particular, since it is possible to obtain a high luminous flux value by reducing the non-luminous area at the end of the arc tube, as shown in FIG. 7, the coldest spot is provided at the other end 11 of the annular arc tube 1 located outside. Is preferably provided.
【0036】〈第5の実施例〉図9は本発明に係る環形
蛍光ランプの第5の実施例のブリッジ接合部周辺の構造
の一例を示す一部切り欠き正面図である。図9に示すよ
うに、環形発光管1、2の両端部の外壁面には湾曲用保
持部20が設けられている。また、環形発光管1、2の
少なくとも非電極側他端部11、12には、湾曲用保持
部20よりも先端側の内壁面に溝部19が設けられてい
る。また、環形発光管1、2の一端部(電極3、4側)
は口金34によって包囲されており、他端部11、12
は口金34と離間して、外気に触れた状態となってい
る。この構成によれば、ランプ製造工程において環形発
光管1、2の湾曲用保持部20をしっかりと保持するこ
とができるので、環形発光管1、2の曲げ精度を高める
ことができる。また、この構成によれば、溝部19に最
冷点箇所が形成され、その温度を最適値に保つことがで
きる。<Fifth Embodiment> FIG. 9 is a partially cutaway front view showing an example of a structure around a bridge joint portion of a fifth embodiment of a ring-shaped fluorescent lamp according to the present invention. As shown in FIG. 9, bending holding portions 20 are provided on the outer wall surfaces of both ends of the ring-shaped arc tubes 1 and 2. Further, at least the other end portions 11 and 12 on the non-electrode side of the ring-shaped arc tubes 1 and 2, a groove portion 19 is provided on the inner wall surface on the tip side of the bending holding portion 20. Also, one end of the circular arc tubes 1 and 2 (on the side of the electrodes 3 and 4)
Is surrounded by the base 34, and the other ends 11, 12
Is separated from the cap 34 and is in a state of being exposed to the outside air. According to this configuration, since the bending holding portion 20 of the ring-shaped arc tubes 1 and 2 can be firmly held in the lamp manufacturing process, the bending accuracy of the ring-shaped arc tubes 1 and 2 can be improved. Further, according to this configuration, the coldest spot is formed in the groove portion 19, and the temperature can be maintained at the optimum value.
【0037】尚、図10に示すように、非電極側他端部
11、12を、電極側端部と同様のステムによって封止
すれば、図9に示すような端部構造の場合に比べて非電
極側他端部11、12の強度が向上する。図9に示す端
部構造の場合には、発光管の一部を溶かして端部を形成
するので、特に管径の大きな発光管では非電極側他端部
11、12の肉厚が薄くなってしまう。これに対し、ス
テムによって封止する場合には、端部を強固に封止する
ことができると共に、発光管の曲げ加工時やランプ完成
後の端部の割れ等の不都合を解消することができる。ま
た、ステムによって封止する場合には、図9に示す端部
構造の場合に比べて製造が比較的容易であり、従来の製
造設備を使用して製造することができる。As shown in FIG. 10, if the other end portions 11 and 12 on the non-electrode side are sealed with a stem similar to the end portion on the electrode side, compared to the case of the end portion structure as shown in FIG. As a result, the strength of the other end portions 11 and 12 on the non-electrode side is improved. In the case of the end portion structure shown in FIG. 9, since the end portion is formed by melting a part of the arc tube, the non-electrode side other end portions 11 and 12 have a thin wall thickness particularly in the arc tube having a large tube diameter. Will end up. On the other hand, in the case of sealing with the stem, the end can be firmly sealed, and inconveniences such as bending of the arc tube and cracking of the end after completion of the lamp can be eliminated. . Further, in the case of sealing with the stem, the manufacturing is relatively easy as compared with the case of the end structure shown in FIG. 9, and the manufacturing can be performed using the conventional manufacturing equipment.
【0038】また、本実施例においては、口金として環
形発光管1、2の一端部のみを包囲する口金34が用い
られているが、必ずしもこの構造の口金に限定されるも
のではなく、少なくとも非電極側他端部11、12が外
気に触れるような口金構造であればよい。Further, in the present embodiment, the base 34 which surrounds only one end of the ring-shaped arc tubes 1 and 2 is used as the base, but the base is not necessarily limited to the base having this structure, and at least non-base. It suffices that the base structure is such that the other end portions 11 and 12 on the electrode side are exposed to the outside air.
【0039】〈第6の実施例〉図11は本発明に係る環
形蛍光ランプの第6の実施例のブリッジ接合部周辺の構
造を示す一部切り欠き正面図である。図11に示すよう
に、口金35は、環形発光管1、2の一端部(電極3、
4側)と非電極側他端部11、12の最冷点箇所とを包
囲して設けられている。また、口金35には、最冷点箇
所を外気に触れさせる通気口10と、環形発光管1、2
の一端部(電極3、4側)と非電極側他端部11、12
とを熱遮蔽する熱遮蔽部材である熱遮蔽用隔壁16とが
設けられている。この構成によれば、通気孔10及び熱
遮蔽用隔壁16の温度上昇防止効果が相俟って最冷点箇
所の温度が最適領域から過度に上昇するのを確実に防止
することができるので、ランプ光束が低下するのを確実
に防止することができる。<Sixth Embodiment> FIG. 11 is a partially cutaway front view showing a structure around a bridge joint portion of a sixth embodiment of a ring-shaped fluorescent lamp according to the present invention. As shown in FIG. 11, the base 35 includes one end portion of the ring-shaped arc tubes 1 and 2 (electrode 3,
4 side) and the coldest spots of the other end portions 11 and 12 on the non-electrode side. Further, the base 35 has a vent 10 for exposing the coldest spot to the outside air, and ring-shaped arc tubes 1, 2.
End portions (electrodes 3, 4 side) and non-electrode side other end portions 11, 12 of
There is provided a heat-shielding partition wall 16 that is a heat-shielding member that thermally shields and. According to this configuration, the effect of preventing the temperature rise of the vent hole 10 and the heat shielding partition wall 16 is combined, and it is possible to reliably prevent the temperature of the coldest spot from excessively rising from the optimum region. It is possible to reliably prevent the lamp luminous flux from decreasing.
【0040】〈第7の実施例〉図12は本発明に係る環
形蛍光ランプの第7の実施例のブリッジ接合部周辺の構
造の一例を示す一部切り欠き正面図である。図12に示
すように、環形発光管1、2の両端部の外壁面には湾曲
用保持部20が設けられている。また、環形発光管1、
2の少なくとも非電極側他端部11、12には、湾曲用
保持部20よりも先端側の内壁面に溝部19が設けられ
ている。他の構成は上記第6の実施例(図11)と同様
であるため、同一部材には同一の符号を付してその説明
は省略する。この構成によれば、溝部19に最冷点箇所
が形成され、その温度が最適値に保たれるので、上記第
6の実施例の場合に比べて、最冷点箇所の温度上昇をさ
らに確実に防止することができる。また、この構成によ
れば、ランプ製造工程において環形発光管1、2の湾曲
用保持部20をしっかりと保持することができるので、
環形発光管1、2の曲げ精度を高めることができる。<Seventh Embodiment> FIG. 12 is a partially cutaway front view showing an example of a structure around a bridge joint portion of a seventh embodiment of a ring-shaped fluorescent lamp according to the present invention. As shown in FIG. 12, bending holding portions 20 are provided on the outer wall surfaces of both ends of the ring-shaped arc tubes 1 and 2. In addition, the ring-shaped arc tube 1,
At least at the other end portions 11 and 12 on the non-electrode side of 2, a groove portion 19 is provided on the inner wall surface on the tip side of the bending holding portion 20. Since the other structure is the same as that of the sixth embodiment (FIG. 11), the same reference numerals are given to the same members and the description thereof will be omitted. According to this structure, the coldest spot is formed in the groove portion 19 and the temperature thereof is maintained at the optimum value. Therefore, the temperature rise of the coldest spot is more surely increased as compared with the case of the sixth embodiment. Can be prevented. Further, according to this configuration, since the bending holding portions 20 of the ring-shaped arc tubes 1 and 2 can be firmly held in the lamp manufacturing process,
The bending accuracy of the ring-shaped arc tubes 1 and 2 can be improved.
【0041】尚、図13に示すように、非電極側他端部
11、12を、電極側端部と同様のステムによって封止
すれば、図12に示すような端部構造の場合に比べて非
電極側他端部11、12の強度が向上する。図12に示
す端部構造の場合には、発光管の一部を溶かして端部を
形成するので、特に管径の大きな発光管では非電極側他
端部11、12の肉厚が薄くなってしまう。これに対
し、ステムによって封止する場合には、端部を強固に封
止することができると共に、発光管の曲げ加工時やラン
プ完成後の端部の割れ等の不都合を解消することができ
る。また、ステムによって封止する場合には、図12に
示す端部構造の場合に比べて製造が比較的容易であり、
従来の製造設備を使用して製造することができる。As shown in FIG. 13, if the other end portions 11 and 12 on the non-electrode side are sealed with a stem similar to the end portion on the electrode side, compared to the case of the end portion structure as shown in FIG. As a result, the strength of the other end portions 11 and 12 on the non-electrode side is improved. In the case of the end structure shown in FIG. 12, a part of the arc tube is melted to form the end part. Therefore, in the arc tube having a large tube diameter, the thicknesses of the other end portions 11 and 12 on the non-electrode side are thin. Will end up. On the other hand, in the case of sealing with the stem, the end can be firmly sealed, and inconveniences such as bending of the arc tube and cracking of the end after completion of the lamp can be eliminated. . Further, in the case of sealing with the stem, the manufacturing is relatively easy as compared with the case of the end structure shown in FIG.
It can be manufactured using conventional manufacturing equipment.
【0042】[0042]
【発明の効果】以上に説明したように、本発明の環形蛍
光ランプは、最冷点箇所が外気と通じるようにしたもの
であるから、最冷点箇所の温度、つまり、管内水銀蒸気
圧がほぼ最適領域に保たれ、高いランプ光束値が得られ
る。また、コンパクトで高効率・高出力の環形蛍光ラン
プが実現される。As described above, the ring-shaped fluorescent lamp of the present invention is designed so that the coldest spot is in communication with the outside air. Therefore, the temperature of the coldest spot, that is, the mercury vapor pressure in the tube is It is kept in the optimum region and a high lamp luminous flux value is obtained. In addition, a compact, high-efficiency, high-output ring-shaped fluorescent lamp will be realized.
【図1】本発明に係る環形蛍光ランプの第1の実施例を
示す一部切り欠き正面図である。FIG. 1 is a partially cutaway front view showing a first embodiment of a ring-shaped fluorescent lamp according to the present invention.
【図2】図1の環形蛍光ランプのブリッジ接合部周辺の
構造を示す一部切り欠き正面図である。FIG. 2 is a partially cutaway front view showing a structure around a bridge joint portion of the annular fluorescent lamp of FIG.
【図3】本発明の第2及び第3の実施例において比較例
として作製した環形蛍光ランプのブリッジ接合部周辺の
構造を示す正面図である。FIG. 3 is a front view showing a structure around a bridge junction of a ring-shaped fluorescent lamp manufactured as a comparative example in the second and third embodiments of the present invention.
【図4】本発明に係る環形蛍光ランプの第2の実施例の
ブリッジ接合部周辺の構造の一例を示す正面図である。FIG. 4 is a front view showing an example of the structure around the bridge joint portion of the second embodiment of the ring-shaped fluorescent lamp according to the present invention.
【図5】本発明に係る環形蛍光ランプの第2実施例のブ
リッジ接合部周辺の構造の他の例を示す正面図である。FIG. 5 is a front view showing another example of the structure around the bridge joint portion of the second embodiment of the ring-shaped fluorescent lamp according to the present invention.
【図6】本発明に係る環形蛍光ランプの第3の実施例の
ブリッジ接合部周辺の構造を示す一部切り欠き正面図で
ある。FIG. 6 is a partially cutaway front view showing a structure around a bridge joint portion of a ring type fluorescent lamp according to a third embodiment of the present invention.
【図7】本発明に係る環形蛍光ランプの第4実施例のブ
リッジ接合部周辺の構造の一例を示す正面図である。FIG. 7 is a front view showing an example of a structure around a bridge joint portion of a ring-shaped fluorescent lamp according to a fourth embodiment of the present invention.
【図8】本発明に係る環形蛍光ランプの第4実施例のブ
リッジ接合部周辺の構造の他の例を示す正面図である。FIG. 8 is a front view showing another example of the structure around the bridge joint portion of the fourth embodiment of the ring-shaped fluorescent lamp according to the present invention.
【図9】本発明に係る環形蛍光ランプの第5の実施例の
ブリッジ接合部周辺の構造の一例を示す一部切り欠き正
面図である。FIG. 9 is a partially cutaway front view showing an example of a structure around a bridge joint portion of a ring type fluorescent lamp according to a fifth embodiment of the present invention.
【図10】本発明に係る環形蛍光ランプの第5の実施例
のブリッジ接合部周辺の構造の他の例を示す一部切り欠
き正面図である。FIG. 10 is a partially cutaway front view showing another example of the structure around the bridge joint portion of the fifth embodiment of the ring-shaped fluorescent lamp according to the present invention.
【図11】本発明に係る環形蛍光ランプの第6の実施例
のブリッジ接合部周辺の構造を示す一部切り欠き正面図
である。FIG. 11 is a partially cutaway front view showing a structure around a bridge joint portion of a ring type fluorescent lamp according to a sixth embodiment of the present invention.
【図12】本発明に係る環形蛍光ランプの第7の実施例
のブリッジ接合部周辺の構造の一例を示す一部切り欠き
正面図である。FIG. 12 is a partially cutaway front view showing an example of a structure around a bridge joint portion of a ring type fluorescent lamp according to a seventh embodiment of the present invention.
【図13】本発明に係る環形蛍光ランプの第7の実施例
のブリッジ接合部周辺の構造の他の例を示す一部切り欠
き正面図である。FIG. 13 is a partially cutaway front view showing another example of the structure around the bridge joint portion of the seventh embodiment of the ring-shaped fluorescent lamp according to the present invention.
1、2 環形発光管 3、4 電極 5 ブリッジ接合部 6 蛍光体 28、29、30、31、32、33、34、35 口
金 10 通気口 11、12 (非電極側)他端部 16 熱遮蔽用隔壁 19 溝部 20 湾曲用保持部1, 2 Ring-shaped arc tube 3, 4 Electrode 5 Bridge junction 6 Phosphor 28, 29, 30, 31, 32, 33, 34, 35 Base 10 Vent 11, 12 (non-electrode side) other end 16 Heat shield Partition wall 19 groove portion 20 bending holding portion
───────────────────────────────────────────────────── フロントページの続き (72)発明者 三軒 正嗣 大阪府高槻市幸町1番1号 松下電子工業 株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masatsugu Sangen 1 1-1 Sachimachi Takatsuki, Osaka Prefecture Matsushita Electronics Industrial Co., Ltd.
Claims (12)
有する複数本の環形発光管が同心円状に配置され、前記
複数本の環形発光管の他端部近傍がブリッジ接合部によ
って接合されて、内部に一本の放電路が形成されると共
に、前記他端部に最冷点箇所が形成された環形蛍光ラン
プであって、前記ブリッジ接合部の端部から前記他端部
の端面中央部までの距離をL(mm)、前記環形発光管
の管外径をd(mm)としたとき、0.5d≦L≦1.
3dなる関係を満足することを特徴とする環形蛍光ラン
プ。1. A plurality of ring-shaped arc tubes, each having an electrode at one end and a closed portion at the other end, are arranged concentrically, and a bridge joint portion is provided in the vicinity of the other ends of the plurality of ring-shaped arc tubes. A ring-shaped fluorescent lamp having a discharge path formed inside and a coldest spot formed at the other end, the bridge being joined from the other end to the other end. Is L (mm) and the outer diameter of the ring-shaped arc tube is d (mm), 0.5d ≦ L ≦ 1.
A ring-shaped fluorescent lamp which satisfies the relationship of 3d.
有する複数本の環形発光管が同心円状に配置され、前記
複数本の環形発光管の他端部近傍がブリッジ接合部によ
って接合されて、内部に一本の放電路が形成されると共
に、前記他端部に最冷点箇所が形成され、かつ、前記一
端部と前記他端部のうち少なくとも一方を包囲する口金
が備わった環形蛍光ランプであって、前記最冷点箇所が
外気に触れていることを特徴とする環形蛍光ランプ。2. A plurality of ring-shaped arc tubes, each having an electrode at one end and a closed portion at the other end, are arranged concentrically, and a bridge joint portion is provided in the vicinity of the other ends of the plurality of ring-shaped arc tubes. Are joined together to form one discharge path inside, a coldest spot is formed at the other end, and a base surrounding at least one of the one end and the other end is formed. An annular fluorescent lamp provided, wherein the coldest spot is exposed to the outside air.
有する複数本の環形発光管が同心円状に配置され、前記
複数本の環形発光管の他端部近傍がブリッジ接合部によ
って接合されて、内部に一本の放電路が形成されると共
に、前記他端部に最冷点箇所が形成され、かつ、前記一
端部と前記他端部のうち少なくとも一方を包囲する口金
が備わった環形蛍光ランプであって、前記口金に、前記
環形発光管の前記一端部と前記他端部とを熱遮蔽する熱
遮蔽部材が設けられたことを特徴とする環形蛍光ラン
プ。3. A plurality of ring-shaped arc tubes, each having an electrode at one end and a closed portion at the other end, are arranged concentrically, and the vicinity of the other ends of the plurality of ring-shaped arc tubes is a bridge joint. Are joined together to form one discharge path inside, a coldest spot is formed at the other end, and a base surrounding at least one of the one end and the other end is formed. A ring-shaped fluorescent lamp provided with the base, wherein the base is provided with a heat shield member for heat-shielding the one end and the other end of the ring-shaped arc tube.
された請求項1〜3のいずれかに記載の環形蛍光ラン
プ。4. The ring-shaped fluorescent lamp according to claim 1, wherein a plurality of ring-shaped arc tubes are arranged on the same plane.
持部が設けられた請求項1〜4のいずれかに記載の環形
蛍光ランプ。5. The ring-shaped fluorescent lamp according to claim 1, wherein the curved holding portions are provided on the outer wall surfaces of both ends of the ring-shaped arc tube.
の湾曲用保持部よりも先端側の内壁面に溝部が設けられ
た請求項5に記載の環形蛍光ランプ。6. The ring-shaped fluorescent lamp according to claim 5, wherein a groove is provided on an inner wall surface of the ring-shaped arc tube at least at the other end of the ring-shaped arc tube on the tip side of the holding portion for bending.
よって封止された請求項1〜6のいずれかに記載の環形
蛍光ランプ。7. The ring-shaped fluorescent lamp according to claim 1, wherein the other end of the ring-shaped arc tube on the non-electrode side is sealed by a stem.
中央部までの距離をL(mm)、環形発光管の管外径を
d(mm)としたとき、0.5d≦L≦1.3dなる関
係を満足する請求項2又は3に記載の環形蛍光ランプ。8. When the distance from the end of the bridge joint to the center of the end face of the other end is L (mm) and the outer diameter of the ring-shaped arc tube is d (mm), 0.5d ≦ L ≦ The ring fluorescent lamp according to claim 2, wherein the relationship of 1.3d is satisfied.
設けられた請求項2に記載の環形蛍光ランプ。9. The ring-shaped fluorescent lamp according to claim 2, wherein the base is provided apart from the coldest spot of the other end.
とを包囲して設けられ、かつ、前記口金に、前記最冷点
箇所を外気に触れさせる通気口が設けられた請求項2又
は3に記載の環形蛍光ランプ。10. A mouthpiece is provided so as to surround one end portion and the coldest spot portion of the other end portion, and the mouthpiece is provided with a vent hole for exposing the coldest spot portion to the outside air. Item 4. The ring-shaped fluorescent lamp according to Item 2 or 3.
ち外側に位置する環形発光管に形成された請求項2又は
3に記載の環形蛍光ランプ。11. The ring-shaped fluorescent lamp according to claim 2, wherein the coldest spot is formed on the ring-shaped arc tube located outside of the plurality of ring-shaped arc tubes.
によって封止された閉塞部を有する複数本の環形発光管
が同一平面上に同心円状に配置され、前記複数本の環形
発光管の他端部近傍がブリッジ接合部によって接合され
て、内部に一本の放電路が形成されると共に、前記他端
部に最冷点箇所が形成された環形蛍光ランプであって、
ブリッジ接合部の端部から前記他端部の端面中央部まで
の距離をL(mm)、前記環形発光管の管外径をd(m
m)としたとき、0.5d≦L≦1.3dなる関係を満
足しており、前記一端部と前記他端部とを包囲する口金
が設けられ、前記口金には、前記最冷点箇所を外気に触
れさせる通気口が設けられ、かつ、前記環形発光管の前
記一端部と前記他端部とを熱遮蔽する熱遮蔽部材が設け
られたことを特徴とする環形蛍光ランプ。12. A plurality of ring-shaped light emitting tubes, each having an electrode at one end and a closed portion sealed by a stem at the other end, are arranged concentrically on the same plane, and the plurality of ring-shaped light-emitting tubes are provided. A ring-shaped fluorescent lamp in which the vicinity of the other end of the tube is joined by a bridge joint, and a single discharge path is formed inside, and a coldest spot is formed at the other end.
The distance from the end of the bridge joint to the center of the end face of the other end is L (mm), and the outer diameter of the ring-shaped arc tube is d (m).
m), the relationship of 0.5d ≦ L ≦ 1.3d is satisfied, and a die surrounding the one end and the other end is provided, and the die has the coldest spot location. A ring-shaped fluorescent lamp, which is provided with a vent for allowing the air to come into contact with the outside air, and a heat-shielding member for thermally shielding the one end and the other end of the ring-shaped arc tube.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP33061495A JP2791304B2 (en) | 1994-12-28 | 1995-12-19 | Ring fluorescent lamp |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6-327810 | 1994-12-28 | ||
JP32781094 | 1994-12-28 | ||
JP33061495A JP2791304B2 (en) | 1994-12-28 | 1995-12-19 | Ring fluorescent lamp |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH08236075A true JPH08236075A (en) | 1996-09-13 |
JP2791304B2 JP2791304B2 (en) | 1998-08-27 |
Family
ID=26572650
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP33061495A Expired - Lifetime JP2791304B2 (en) | 1994-12-28 | 1995-12-19 | Ring fluorescent lamp |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2791304B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007123225A (en) * | 2005-09-30 | 2007-05-17 | Toshiba Lighting & Technology Corp | Fluorescent lamp with auxiliary light source |
JP2010009883A (en) * | 2008-06-25 | 2010-01-14 | Panasonic Electric Works Co Ltd | Plane spiral type fluorescent lamp and luminaire |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55133744A (en) * | 1979-04-03 | 1980-10-17 | Philips Nv | Low voltage mercury vapor discharge lamp |
JPS5986656U (en) * | 1982-12-02 | 1984-06-12 | 東芝ライテック株式会社 | fluorescent lamp device |
JPH0261956A (en) * | 1988-08-26 | 1990-03-01 | Hitachi Ltd | Fluorescent lamp |
-
1995
- 1995-12-19 JP JP33061495A patent/JP2791304B2/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55133744A (en) * | 1979-04-03 | 1980-10-17 | Philips Nv | Low voltage mercury vapor discharge lamp |
JPS5986656U (en) * | 1982-12-02 | 1984-06-12 | 東芝ライテック株式会社 | fluorescent lamp device |
JPH0261956A (en) * | 1988-08-26 | 1990-03-01 | Hitachi Ltd | Fluorescent lamp |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007123225A (en) * | 2005-09-30 | 2007-05-17 | Toshiba Lighting & Technology Corp | Fluorescent lamp with auxiliary light source |
JP2010009883A (en) * | 2008-06-25 | 2010-01-14 | Panasonic Electric Works Co Ltd | Plane spiral type fluorescent lamp and luminaire |
Also Published As
Publication number | Publication date |
---|---|
JP2791304B2 (en) | 1998-08-27 |
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