JP2001093469A - Double tube type fluorescent lamp - Google Patents
Double tube type fluorescent lampInfo
- Publication number
- JP2001093469A JP2001093469A JP31284499A JP31284499A JP2001093469A JP 2001093469 A JP2001093469 A JP 2001093469A JP 31284499 A JP31284499 A JP 31284499A JP 31284499 A JP31284499 A JP 31284499A JP 2001093469 A JP2001093469 A JP 2001093469A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- inner tube
- outer tube
- fluorescent lamp
- gap
- 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
- 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、液晶ディスプレ
イ、計器用表示パネルの液晶表示装置の表示用背面光源
として用いられる２重管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 double-tube fluorescent lamp used as a back light source for display of a liquid crystal display device of a liquid crystal display or an instrument display panel.
【０００２】[0002]
【従来の技術】従来、この種の２重管形蛍光ランプに関
しては、例えば特開平１０−２７５５９３号公報に記載
されるような発明が存在する。前記発明は、外管の直管
状部を半径内方向に窪ませて内管に接触する窪み部を形
成したり、内管の直管状部を半径外方向に突出させて突
出部を形成し、内管と外管との間に形成されている隙間
に突出形成された突出部を管壁に形成し、又、内管及び
外管を彎曲させて平視Ｌ字形、コ字形等に形成した２重
管形蛍光ランプが開示されている。前記窪み部、突出部
及び彎曲部は、管を部分的にガスやレーザーによって加
熱軟化させて治具で押圧する等して加工するが、外管と
内管との垂直距離、加熱時間、或いは温度が均一でなけ
れば、所望寸法の窪み部や、突出部が形成不可能で、し
かも加熱条件の不均一により外管と内管は、両管の直管
状部間の隙間よりも近接している状態や、外管と内管が
当接している状態、外管と内管が溶融して溶着している
状態のいずれか生じる。2. Description of the Related Art Conventionally, with respect to this type of double-tube fluorescent lamp, there has been an invention as described in, for example, JP-A-10-275593. The invention is such that a straight tubular portion of the outer tube is depressed in a radially inward direction to form a recessed portion in contact with the inner tube, or a straight tubular portion of the inner tube is projected radially outward to form a projected portion, A projection formed in a gap formed between the inner pipe and the outer pipe is formed on the pipe wall, and the inner pipe and the outer pipe are curved to form an L-shape or a U-shape in plan view. A double-tube fluorescent lamp is disclosed. The dents, protrusions and bends are processed by partially heating and softening the pipe with gas or laser and pressing it with a jig, but the vertical distance between the outer pipe and the inner pipe, heating time, or If the temperature is not uniform, it is impossible to form a dent or protrusion of the desired size, and due to uneven heating conditions, the outer tube and the inner tube are closer than the gap between the straight tubular portions of both tubes. The outer tube and the inner tube are in contact with each other, or the outer tube and the inner tube are fused and welded.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記従
来例であると、加熱加工部が溶融して外管と内管が溶着
すると、ガラスバルブに歪みが生じ、又、振動や衝撃が
加わると溶着部の端部に集中的に応力が加わり、その結
果、外管と内管の窪み部や突出部が対向管壁面に近接し
ている場合や、当接している場合に比較して内管にクラ
ックが発生しやすく、耐振動性や、耐衝撃性が低いとい
う問題点があった。However, in the above-mentioned conventional example, when the heat-processed portion is melted and the outer tube and the inner tube are welded, distortion occurs in the glass bulb, and when the vibration or impact is applied, the glass bulb is welded. As a result, stress is concentrated on the ends of the inner pipe, and as a result, the inner pipe is more indented or protruded than the outer pipe and the inner pipe are closer to or facing the opposite pipe wall. There is a problem that cracks are easily generated, and vibration resistance and impact resistance are low.
【０００４】そこで、本発明は、外管に窪み部や内管に
突出部を、或は外管及び内管を共に彎曲して平視Ｌ字
形、コ字形等に形成する場合に、加熱温度等の加工条件
に差があっても外管と内管が当接したり、溶着すること
がなく、耐振動性、耐衝撃性の高い、高信頼性の２重管
形蛍光ランプを提供することを目的とする。Therefore, the present invention provides a heating temperature when a concave portion is formed in an outer tube, a projecting portion is formed in an inner tube, or both an outer tube and an inner tube are curved to form an L-shape or a U-shape in plan view. The present invention provides a highly reliable double-tube fluorescent lamp that has high vibration resistance and shock resistance without the outer tube and the inner tube coming into contact or welding even if there is a difference in processing conditions such as With the goal.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に、本発明のうち請求項１記載の発明は、通電により発
光するようにガラスバルブの内面に蛍光体被膜を形成
し、前記ガラスバルブの内部には放電媒体が封入され、
前記ガラスバルブの両端内側には１対の電極が封装さ
れ、該電極と電気的に接続されたリード線を外部電源よ
り結電可能に前記ガラスバルブの両端封止部を気密に貫
通して外部に導出されて成る蛍光ランプを内管となし、
該内管の周囲に隙間を形成して外管で包囲すると共に前
記外管の両端を前記内管のガラスバルブの両端封止部に
て封止し、且つ前記隙間を真空にするか若しくは１気圧
未満の封入圧で希ガスが封入され、前記外管の直管状部
分に半径内方向に窪む窪み部を形成するか若しくは前記
内管の直管状部分に半径外方向に突出する突出部を形成
して、前記隙間に突出する突出部を外管若しくは内管に
設けて成る２重管形蛍光ランプにおいて、前記隙間にお
ける突出部に微粒子層を被着形成し、前記内管のガラス
バルブの両端封止部以外の部分では前記内管と前記外管
が当接せず又は／及び溶着していないことを特徴とす
る。In order to achieve the above-mentioned object, according to the first aspect of the present invention, a phosphor film is formed on an inner surface of a glass bulb so as to emit light by energization, Is filled with a discharge medium,
A pair of electrodes are sealed inside both ends of the glass bulb, and a lead wire electrically connected to the electrodes is air-tightly penetrated through both end sealing portions of the glass bulb so that an electric power can be connected from an external power supply. A fluorescent lamp derived from
A gap is formed around the inner tube, the outer tube is surrounded by the outer tube, and both ends of the outer tube are sealed at both ends of the glass bulb of the inner tube, and the gap is evacuated or A rare gas is sealed at a filling pressure of less than atmospheric pressure, and a recessed portion is formed in the straight tubular portion of the outer tube so as to be depressed radially inward, or a projecting portion projecting radially outward in the straight tubular portion of the inner tube. In the double-tube fluorescent lamp, wherein a protrusion protruding into the gap is provided on the outer tube or the inner tube, a fine particle layer is formed on the protrusion in the gap to form a glass bulb of the inner tube. The inner tube and the outer tube are not in contact with each other or / and are not welded in portions other than the sealing portions at both ends.
【０００６】本発明のうち請求項２記載の発明は、外管
と内管との間に形成されている隙間に突出する突出部と
対向する管壁面に微粒子層を被着形成し、前記内管のガ
ラスバルブの両端封止部以外の部分では前記内管と前記
外管が当接せず又は／及び溶着していないこと特徴とす
る。According to a second aspect of the present invention, a fine particle layer is formed on a wall surface of a tube opposite to a protrusion protruding into a gap formed between an outer tube and an inner tube. The inner tube and the outer tube are not in contact with each other or / and are not welded at portions other than the sealing portions at both ends of the glass bulb of the tube.
【０００７】本発明のうち請求項３記載の発明は、上記
内管及び外管は、中間部が彎曲し、この彎曲部における
内管外面若しくは外管内面には微粒子層が被着形成さ
れ、前記内管のガラスバルブの両端封止部以外の部分で
は前記内管と前記外管が当接せず又は／及び溶着してい
ないことを特徴とする。According to a third aspect of the present invention, the inner tube and the outer tube are curved at an intermediate portion, and a fine particle layer is formed on the outer surface of the inner tube or the inner surface of the outer tube at the curved portion. The inner tube and the outer tube are not in contact with each other or / and are not welded at portions other than the sealing portions at both ends of the glass bulb of the inner tube.
【０００８】本発明のうち請求項４記載の発明は、上記
微粒子層の形成位置と対向する管壁との間に、前記隙間
と連通する隙間を設けたことを特徴とする。The invention according to claim 4 of the present invention is characterized in that a gap communicating with the gap is provided between the position where the fine particle layer is formed and the opposed tube wall.
【０００９】本発明のうち請求項５記載の発明は、微粒
子層の厚みが、０．０１〜５０μｍであることを特徴と
する。The invention according to claim 5 of the present invention is characterized in that the thickness of the fine particle layer is 0.01 to 50 μm.
【００１０】本発明のうち請求項６記載の発明は、微粒
子層を構成する物質の平均粒径０．００５〜１０μｍで
あることを特徴とする。The invention according to claim 6 of the present invention is characterized in that the substance constituting the fine particle layer has an average particle diameter of 0.005 to 10 μm.
【００１１】本発明のうち請求項７記載の発明は、微粒
子層が、Ａｌ２Ｏ３、ＳｉＯ２、ＴｉＯ２、ＭｇＯ、Ｙ
２Ｏ３の中から選ばれた少なくとも１種以上の物質によ
り構成されている事を特徴とする。In the invention according to claim 7 of the present invention, the fine particle layer is made of Al 2 O 3 , SiO 2 , TiO 2 , MgO, Y
It is characterized by being composed of at least one substance selected from 2 O 3 .
【００１２】[0012]
【発明の実施の形態】以下、図を参照にして本発明の実
施の形態について説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１３】各図面において、図１は２重管形蛍光ラン
プの斜視図、図２は断面図、図３は図１のＡ−Ａ線断面
図である。これらの図において、発光管としての作用を
なす内管１は薄肉のガラス製の直管形ガラスバルブ２の
内面に蛍光体被膜３を形成し、内部には放電媒体として
微量の水銀及び１種類以上の希ガス、例えばアルゴンガ
ス、ネオンガス、キセノンガス等が封入され、両端は封
止されている。ガラスバルブ２の両端内側には、１対の
内部電極４、４が対設して封着され、内部電極４、４と
電気的に接続され、外部電源（図示せず）より給電可能
なリード線５、５は、前記ガラスバルブ２の両端封止部
を気密に貫通して外部に導出されている。FIG. 1 is a perspective view of a double-tube fluorescent lamp, FIG. 2 is a sectional view, and FIG. 3 is a sectional view taken along line AA of FIG. In these figures, an inner tube 1 acting as an arc tube has a phosphor coating 3 formed on the inner surface of a thin glass straight tube glass bulb 2 and a small amount of mercury and one type as a discharge medium inside. The above rare gases, for example, argon gas, neon gas, xenon gas, etc. are sealed, and both ends are sealed. A pair of internal electrodes 4, 4 are sealed opposite to each other inside the glass bulb 2, electrically connected to the internal electrodes 4, 4, and can be supplied with power from an external power supply (not shown). The wires 5 and 5 pass through the sealing portions at both ends of the glass bulb 2 and are led out to the outside.
【００１４】外管６は、その内径が内管１の外径よりも
大径な無色透明な薄肉直管形のガラスバルブより成る。
内管１の周囲には隙間７を形成して内管１と略同心の位
置関係となるように外管６で包囲すると共に、この外管
６の両端は、内管１の両端封止部に於いて溶着等の手段
により内管１の封止部と一体化されている。隙間７は、
真空にするか、若しくは１気圧未満の希ガスが封入され
ている。外管６の直管状部分には、半径内方向に窪む窪
み部８を対向する位置に形成している。本実施例では、
窪み部８を、外管６の周方向に１８０°の間隔をおいて
２箇所に設けてあるが、周方向に１２０°の間隔をおい
て３箇所に設ける場合等、窪み部８の数は限定しない。
内管１の外面に於ける窪み部８の対応位置には、厚さ２
０μｍ程度の微粒子層９が被着形成されている。微粒子
層９は、平均粒径が０．００５〜１０μｍの、Ａｌ２Ｏ
３、ＳｉＯ２、ＴｉＯ２、Ｍｇｏ、Ｙ２Ｏ３の中から選
ばれた少くとも１種以上の物質より構成されている。窪
み部８の谷部内面と内管１の外面との間に微粒子層９を
介在させ、窪み部８の谷部内面は微粒子層９と当接して
いるが、内管１の外面とは当接していない。The outer tube 6 is a colorless, transparent, thin-walled, straight tube-shaped glass bulb whose inner diameter is larger than the outer diameter of the inner tube 1.
A gap 7 is formed around the inner tube 1 and is surrounded by the outer tube 6 so as to be substantially concentric with the inner tube 1, and both ends of the outer tube 6 are sealed at both ends of the inner tube 1. In this case, it is integrated with the sealing portion of the inner tube 1 by means such as welding. The gap 7 is
A vacuum or a rare gas of less than 1 atm is sealed. The straight tube portion of the outer tube 6 has a recessed portion 8 that is recessed in a radially inward direction at a position facing the recessed portion 8. In this embodiment,
Although the recesses 8 are provided at two places at 180 ° intervals in the circumferential direction of the outer tube 6, the number of the recesses 8 is, for example, at three places at 120 ° intervals in the circumferential direction. Not limited.
At a position corresponding to the depression 8 on the outer surface of the inner tube 1, a thickness 2
A fine particle layer 9 having a thickness of about 0 μm is formed. The fine particle layer 9 is made of Al 2 O having an average particle size of 0.005 to 10 μm.
3 , SiO 2 , TiO 2 , Mgo, and Y 2 O 3 . A fine particle layer 9 is interposed between the inner surface of the valley of the depression 8 and the outer surface of the inner tube 1, and the inner surface of the valley of the depression 8 is in contact with the fine particle layer 9, but does not contact the outer surface of the inner tube 1. Not in contact.
【００１５】図４に示される実施の形態について説明す
る。窪み部８の谷部内面と微粒子層９とは当接せず、外
管６の直管状部分内面と内管１の外面との垂直距離より
も著しく短い距離の隙間７ａを形成している。この隙間
７ａは隙間７と連通していることは勿論である。他の構
成は、前述の図１〜図３に示される実施の形態と全く同
様であるので、説明を省略する。The embodiment shown in FIG. 4 will be described. The inner surface of the valley of the depression 8 does not contact the fine particle layer 9, and forms a gap 7 a having a distance significantly shorter than the vertical distance between the inner surface of the straight tube portion of the outer tube 6 and the outer surface of the inner tube 1. This gap 7 a is of course connected to the gap 7. The other configuration is exactly the same as the embodiment shown in FIGS.
【００１６】図５に示される実施の形態について説明す
る。外管６の窪み部８の内面には、厚さ２０μｍ程度の
微粒子層９が被着形成されている。内管１の外面に於け
る窪み部８の対応位置と、窪み部８の内面との間に微粒
子層９が内管１の外面に当接して介在している。The embodiment shown in FIG. 5 will be described. A fine particle layer 9 having a thickness of about 20 μm is formed on the inner surface of the depression 8 of the outer tube 6. A fine particle layer 9 is interposed between the corresponding position of the depression 8 on the outer surface of the inner tube 1 and the inner surface of the depression 8 in contact with the outer surface of the inner tube 1.
【００１７】図６に示される実施の形態について説明す
る。外管６の窪み部８の内面に被着形成されている微粒
子層９と内管１の外面との間には、隙間７と連通する隙
間７ａを形成している。他の構成は、前述の図５に示さ
れる実施の形態と同様である。The embodiment shown in FIG. 6 will be described. A gap 7 a communicating with the gap 7 is formed between the fine particle layer 9 attached to the inner surface of the recess 8 of the outer tube 6 and the outer surface of the inner tube 1. Other configurations are the same as those of the embodiment shown in FIG.
【００１８】図７に示される実施の形態について説明す
る。内管１の直管状部分には、半径外方向に突出して形
成された突出部１０を設けている。外管６の内面に於け
る突出部１０の対応位置には微粒子層９を被着形成して
いる。突出部１０の頂部外面は微粒子層９と当接する
が、外管６の内面とは当接せず、突出部１０の頂部外面
と外管６の内面との間に微粒子層９を介在させている。The embodiment shown in FIG. 7 will be described. The straight tube portion of the inner tube 1 is provided with a protrusion 10 formed so as to protrude radially outward. A fine particle layer 9 is formed on the inner surface of the outer tube 6 at a position corresponding to the protrusion 10. The top outer surface of the protrusion 10 contacts the fine particle layer 9, but does not contact the inner surface of the outer tube 6. The fine particle layer 9 is interposed between the top outer surface of the protrusion 10 and the inner surface of the outer tube 6. I have.
【００１９】図８に示される実施の形態について説明す
る。微粒子層９と突出部１０の頂部との間に隙間７と連
通する隙間７ａを設けている。他の構成は前述の図７に
示される実施例と同様である。The embodiment shown in FIG. 8 will be described. A gap 7 a communicating with the gap 7 is provided between the fine particle layer 9 and the top of the protrusion 10. Other configurations are the same as those of the embodiment shown in FIG.
【００２０】図９に示される実施の形態について説明す
る。内管１の直管状部分に、半径外方向に突出して形成
された突出部１０を設け、この突出部１０の外面には微
粒子層９を被着形成している。突出部１０の頂部位置に
於ける微粒子層９は外管６の内面と当接しているが、突
出部１０の外面と外管６の内面は当接していない。The embodiment shown in FIG. 9 will be described. A projecting portion 10 is formed on the straight tubular portion of the inner tube 1 so as to project outward in a radial direction, and a fine particle layer 9 is formed on the outer surface of the projecting portion 10. The fine particle layer 9 at the top of the protrusion 10 is in contact with the inner surface of the outer tube 6, but the outer surface of the protrusion 10 is not in contact with the inner surface of the outer tube 6.
【００２１】図１０に示される実施の形態について説明
する。突出部１０の外面に形成された微粒子層９と外管
６との間に隙間７と連通する隙間７ａを設けている。他
の構成は前述の図９に示される実施の形態と同様であ
る。The embodiment shown in FIG. 10 will be described. A gap 7 a communicating with the gap 7 is provided between the fine particle layer 9 formed on the outer surface of the protrusion 10 and the outer tube 6. Other configurations are the same as those of the embodiment shown in FIG.
【００２２】図１１に示される実施の形態について説明
する。内管１１は平面Ｌ字形状に形成されており、内管
１１の周囲には隙間７を形成して内管１１と略同心の位
置関係となるようにＬ字形外管１２で包囲すると共に、
この外管１２の両端は内管１１の両端封止部に於いて溶
着等の手段により内管１１の封止部と一体化している。
隙間７は真空にするか、若しくは１気圧未満の希ガス封
入されている。内管１１の彎曲部１３に於ける外周面に
は微粒子層９を被着形成している。微粒子層形成位置に
対応する外管１２の内面は、微粒子層９と当接するが、
内管１１の外面とは当接していない。彎曲部１３に於い
て、微粒子層９は外管１２の内面に被着形成され、内管
１１と外管１２が当接することなく、微粒子層９と内管
１１の外面が当接している場合や、内管１１の外面若し
くは外管１２の内面に微粒子層９が形成されて、微粒子
層９の表面と対向する外管１２の内面若しくは内管１１
の外面との間に隙間が形成されている場合も本発明に含
まれる。又、外管１２の直管状部分には半径内方向に窪
む窪み部８を形成している。内管１１の外面に於ける窪
み部８の対応位置には微粒子層９が被着形成されてい
る。微粒子層９は、窪み部８の谷部内面と当接している
が、内管１１と外管１２は当接していない。尚、直管状
部分には、前述の図４〜１０に示すように、外管１２に
窪み部８を形成し、この窪み部８の内面に微粒子層９を
被着形成する場合、被着形成された微粒子層９の表面を
対向する管壁面から離隔して隙間を形成する場合、若し
くは内管１１に突出部を設けて、この突出部或いは対向
する外管内面のいずれかに微粒子層を被着形成し、内管
と外管が当接しないように微粒子層のみを内管と外管の
双方に当接させるか、或は離隔して隙間を形成する場合
も本発明に含まれる。The embodiment shown in FIG. 11 will be described. The inner tube 11 is formed in a plane L-shape, and a gap 7 is formed around the inner tube 11 so that the inner tube 11 is surrounded by an L-shaped outer tube 12 so as to be substantially concentric with the inner tube 11.
Both ends of the outer tube 12 are integrated with the sealed portion of the inner tube 11 by means such as welding at both end sealed portions of the inner tube 11.
The gap 7 is evacuated or filled with a rare gas of less than 1 atm. A fine particle layer 9 is formed on the outer peripheral surface of the curved portion 13 of the inner tube 11. The inner surface of the outer tube 12 corresponding to the fine particle layer forming position is in contact with the fine particle layer 9,
It does not contact the outer surface of the inner tube 11. In the curved portion 13, the fine particle layer 9 is formed on the inner surface of the outer tube 12, and the inner layer 11 and the outer surface of the inner tube 11 are in contact with each other without the inner tube 11 and the outer tube 12 abutting on each other. Also, the fine particle layer 9 is formed on the outer surface of the inner tube 11 or the inner surface of the outer tube 12, and the inner surface of the outer tube 12 or the inner tube 11 facing the surface of the fine particle layer 9.
The present invention also includes a case where a gap is formed between the outer surface and the outer surface. In addition, the straight tube portion of the outer tube 12 is formed with a concave portion 8 which is depressed in a radially inward direction. A fine particle layer 9 is formed on the outer surface of the inner tube 11 at a position corresponding to the depression 8. Although the fine particle layer 9 is in contact with the inner surface of the valley of the depression 8, the inner tube 11 and the outer tube 12 are not in contact. In addition, as shown in FIGS. 4 to 10 described above, the hollow portion 8 is formed in the outer tube 12 in the straight tubular portion, and when the fine particle layer 9 is formed on the inner surface of the hollow portion 8, the forming process is not performed. When a gap is formed by separating the surface of the formed fine particle layer 9 from the opposing pipe wall surface, or by providing a protruding portion on the inner tube 11, the fine particle layer is covered on either the protruding portion or the inner surface of the opposing outer tube. The present invention also includes a case where only the fine particle layer is brought into contact with both the inner tube and the outer tube so that the inner tube and the outer tube are not brought into contact with each other, or a gap is formed separately.
【００２３】上述の実施の形態では、ガスやレーザー光
線で熱加工する位置の外管の内面若しくは内管の外面に
厚さ５０μｍ以下の微粒子層を設けている。そのため、
ガス等で熱加工する場合に加熱時間や温度に差があって
も、外管と内管は当接することなく、微粒子層のみと当
接しているか、又は隙間を形成しているので、内管と外
管が溶融せず、製品に耐振性及び耐衝撃性に対して著し
く低いものがなくなり、品質が一定化する。In the above-described embodiment, a fine particle layer having a thickness of 50 μm or less is provided on the inner surface of the outer tube or the outer surface of the inner tube at the position where the gas or laser beam is used for thermal processing. for that reason,
Even if there is a difference in the heating time or temperature when performing thermal processing with gas, etc., the outer tube and the inner tube do not abut, but only the fine particle layer is in contact or a gap is formed. And the outer tube does not melt, the product has no remarkably low vibration resistance and impact resistance, and the quality is stabilized.
【００２４】[0024]
【試験例】上述の図１〜３に示される２重管形蛍光ラン
プについて、バックライトユニットに組み込む場合等を
想定して耐衝撃荷重とクラックの発生していない良品の
残存率との関係を試験した。試験方法は、１００Ｇから
１００Ｇ毎に５００Ｇまで衝撃荷重を増加させ、各衝撃
荷重における試験終了後の良品残存率を％で表示した。
その結果は、図１２の実線に示す通り、５００Ｇでも良
品率は１００％であり、すべての供試品にクラックの発
生はなかった。比較のため、微粒子層を有しない従来の
２重管形蛍光ランプについても、同様の方法で試験を行
った。その結果は、図１２中に点線で示す通り、２００
Ｇでクラックが発生開始し、５００Ｇでは良品残存率が
５０％であった。[Test Example] The relationship between the impact resistance and the residual rate of non-cracked non-defective products was assumed for the double tube fluorescent lamp shown in FIGS. Tested. In the test method, the impact load was increased from 100 G to 500 G every 100 G, and the percentage of non-defective products after the test at each impact load was expressed in%.
As a result, as shown by the solid line in FIG. 12, the non-defective rate was 100% even at 500 G, and no crack was generated in all the test pieces. For comparison, a conventional double-tube fluorescent lamp having no fine particle layer was tested in the same manner. The result is 200 as shown by the dotted line in FIG.
At G, cracks started to occur, and at 500 G, the non-defective rate was 50%.
【００２５】以上の実施の形態においては、内管及び外
管が直管形状やＬ字形状の２重管形蛍光ランプを例に説
明したが、本発明はこれに限定されるものではなく、コ
字形、Ｕ字形、Ｗ字形等の形状のものや、又、ガラスバ
ルブの縦断面形状も円形状のものに限定せず方形状など
のものも含まれる。又、内管及び外管の寸法、例えば肉
厚、内径、外径、全長等や導入線や内部電極の材質など
も用途に応じて好適なものを使用するため、限定しな
い。In the above embodiment, a double tube fluorescent lamp in which the inner tube and the outer tube have a straight tube shape or an L-shape has been described as an example, but the present invention is not limited to this. Shapes such as U-shape, U-shape, W-shape, and the like are also included. In addition, dimensions of the inner tube and the outer tube, for example, wall thickness, inner diameter, outer diameter, overall length, etc., and materials of the lead-in line and the internal electrode are not limited because they are suitable for the intended use.
【００２６】[0026]
【発明の効果】本発明は、隙間に於いて、隙間方に突出
する突出部若しくはこの突出部と対向する管壁面に５０
μｍ以下の微粒子層を被着形成し、この微粒子層表面に
対向する管壁を当接させるか若しくは微粒子層の表面と
対向する管壁との間に隙間を形成して、内管と外管が当
接していないし、溶着もしていない構造であるので、ガ
ス若しくはレーザーで加熱加工する際に、外管と内管が
溶着することがなく、耐衝撃性の高い、高品質、高信頼
性の２重管形傾向ランプを提供し得るという効果があ
る。According to the present invention, the present invention is directed to a case where a projection is provided on a wall or a wall of a tube opposed to the projection.
The inner tube and the outer tube are formed by depositing and forming a fine particle layer of μm or less and contacting the tube wall facing the surface of the fine particle layer or forming a gap between the surface of the fine particle layer and the facing tube wall. Is not in contact with or welded, so when heating with gas or laser, the outer and inner tubes are not welded, and have high impact resistance, high quality and high reliability. There is an effect that a double tubular trend lamp can be provided.
【図１】本発明２重管形蛍光ランプの実施の形態を示す
斜視図である。FIG. 1 is a perspective view showing an embodiment of a double tube fluorescent lamp of the present invention.
【図２】２重管形蛍光ランプの断面図である。FIG. 2 is a sectional view of a double-tube fluorescent lamp.
【図３】図２のＡ−Ａ線断面図である。FIG. 3 is a sectional view taken along line AA of FIG. 2;
【図４】本発明の２重管形蛍光ランプの実施の形態を示
す要部の拡大断面図である。FIG. 4 is an enlarged sectional view of a main part showing an embodiment of a double-tube fluorescent lamp of the present invention.
【図５】本発明の２重管形蛍光ランプの実施の形態を示
す要部の拡大断面図である。FIG. 5 is an enlarged sectional view of a main part showing an embodiment of a double-tube fluorescent lamp of the present invention.
【図６】本発明の２重管形蛍光ランプの実施の形態を示
す要部の拡大断面図である。FIG. 6 is an enlarged sectional view of a main part showing an embodiment of a double tube fluorescent lamp of the present invention.
【図７】本発明の２重管形蛍光ランプの実施の形態を示
す要部の拡大断面図である。FIG. 7 is an enlarged sectional view of a main part showing an embodiment of a double tube fluorescent lamp of the present invention.
【図８】本発明の２重管形蛍光ランプの実施の形態を示
す要部の拡大断面図である。FIG. 8 is an enlarged sectional view of a main part showing an embodiment of a double tube fluorescent lamp of the present invention.
【図９】本発明の２重管形蛍光ランプの実施の形態を示
す要部の拡大断面図である。FIG. 9 is an enlarged sectional view of a main part showing an embodiment of a double tube fluorescent lamp of the present invention.
【図１０】本発明の２重管形蛍光ランプの実施の形態を
示す要部の拡大断面図である。FIG. 10 is an enlarged sectional view of a main part showing an embodiment of a double-tube fluorescent lamp of the present invention.
【図１１】本発明２重管形蛍光ランプの実施の形態を示
す断面図である。FIG. 11 is a sectional view showing an embodiment of a double tube fluorescent lamp of the present invention.
【図１２】耐衝撃荷重と良品の残存率の関係を示すグラ
フ図である。FIG. 12 is a graph showing a relationship between an impact load and a remaining rate of a non-defective product.
１、１１ 内管 ２ ガラスバルブ ３ 蛍光体被膜 ４ 電極 ５ リード線 ６、１２ 外管 ７、７ａ 隙間 ８ 窪み部 ９ 微粒子層 １０ 突出部 １３ 彎曲部 DESCRIPTION OF SYMBOLS 1, 11 Inner tube 2 Glass bulb 3 Phosphor coating 4 Electrode 5 Lead wire 6, 12 Outer tube 7, 7a Gap 8 Depression 9 Fine particle layer 10 Projection 13 Curved portion
Claims (7)
の内面に蛍光体被膜を形成し、前記ガラスバルブの内部
には放電媒体が封入され、前記ガラスバルブの両端内側
には１対の電極が封装され、該電極と電気的に接続され
たリード線を外部電源より給電可能に前記ガラスバルブ
の両端封止部を気密に貫通して外部に導出され成る蛍光
ランプを内管となし、該内管の周囲に隙間を形成して外
管で包囲すると共に、前記外管の両端を前記内管のガラ
スバルブの両端封止部にて封止し、且つ前記隙間を真空
にするか若しくは１気圧未満の封入圧で希ガスが封入さ
れ、前記外管の直管状部分に半径内方向に窪む窪み部を
形成するか若しくは前記内管の直管状部分に半径外方向
に突出する突出部を形成することにより、前記隙間に突
出する突出部を外管若しくは内管に設けてなる２重管形
蛍光ランプにおいて、前記隙間に突出して形成された隙
間に於ける突出部に微粒子層を被着形成し、前記内管の
ガラスバルブの両端封止部以外の部分では前記内管と前
記外管が当接せず又は／及び溶着していないことを特徴
とする２重管形蛍光ランプ。1. A phosphor film is formed on an inner surface of a glass bulb so as to emit light when energized, a discharge medium is sealed inside the glass bulb, and a pair of electrodes are sealed inside both ends of the glass bulb. A fluorescent lamp which is hermetically penetrated through both end sealing portions of the glass bulb and is led out to the outside so that a lead wire electrically connected to the electrode can be supplied with power from an external power source; A gap is formed around the outer tube and the outer tube is surrounded by the outer tube, and both ends of the outer tube are sealed at both ends of the glass bulb of the inner tube, and the gap is evacuated or less than 1 atm. The noble gas is sealed at the filling pressure of (i), and a concave portion that is depressed in a radially inward direction is formed in the straight tubular portion of the outer tube, or a protruding portion that protrudes radially outward is formed in the straight tubular portion of the inner tube. The protrusion projecting into the gap can be Alternatively, in a double-tube fluorescent lamp provided in the inner tube, a fine particle layer is formed on a protruding portion in the gap formed so as to protrude into the gap, and a portion other than the sealing portions at both ends of the glass bulb of the inner tube is provided. Wherein the inner tube and the outer tube are not in contact with each other and / or are not welded to each other.
の内面に蛍光体被膜を形成し、前記ガラスバルブの内部
には放電媒体が封入され、前記ガラスバルブの両端内側
には１対の電極が封装され、該電極と電気的に接続され
たリード線を外部電源より給電可能に前記ガラスバルブ
の両端封止部を気密に貫通して外部に導出され成る蛍光
ランプを内管となし、該内管の周囲に隙間を形成して外
管で包囲すると共に、前記外管の両端を前記内管のガラ
スバルブの両端封止部にて封止し、且つ前記隙間を真空
にするか若しくは１気圧未満の封入圧で希ガスが封入さ
れ、前記外管の直管状部分に半径内方向に窪む窪み部を
形成するか若しくは前記内管の直管状部分に半径外方向
に突出する突出部を形成することにより前記隙間に突出
する突出部を外管若しくは内管に設けてなる２重管形蛍
光ランプにおいて、前記隙間に突出して形成された前記
突出部と対向する管壁面に微粒子層を被着形成し、前記
内管のガラスバルブの両端封止部以外の部分では前記内
管と前記外管が当接せず又は／及び溶着していないこと
を特徴とする２重管形蛍光ランプ。2. A phosphor film is formed on an inner surface of a glass bulb so as to emit light when energized, a discharge medium is sealed inside the glass bulb, and a pair of electrodes are sealed inside both ends of the glass bulb. A fluorescent lamp which is hermetically penetrated through both end sealing portions of the glass bulb and is led out to the outside so that a lead wire electrically connected to the electrode can be supplied with power from an external power source; A gap is formed around the outer tube and the outer tube is surrounded by the outer tube, and both ends of the outer tube are sealed at both ends of the glass bulb of the inner tube, and the gap is evacuated or less than 1 atm. The noble gas is sealed at the filling pressure of (i), and a concave portion that is depressed in a radially inward direction is formed in the straight tubular portion of the outer tube, or a protruding portion that protrudes radially outward is formed in the straight tubular portion of the inner tube. The projecting portion projecting into the gap is Alternatively, in a double-tube fluorescent lamp provided on the inner tube, a fine particle layer is formed on the wall surface of the tube facing the protrusion formed to protrude into the gap, and both ends of the glass bulb of the inner tube are sealed. A double-tube fluorescent lamp, wherein the inner tube and the outer tube are not in contact with each other or / and are not welded in a portion other than the stop portion.
し、この彎曲部に於ける前記内管外面若しくは外管内面
には微粒子層が被着形成され、前記内管のガラスバルブ
の両端封止部以外の部分では前記内管と前記外管が当接
せず又は／及び溶着していないことを特徴とする請求項
１又は２記載の２重管形蛍光ランプ。3. The inner tube and the outer tube are curved at an intermediate portion, and a fine particle layer is formed on the outer surface of the inner tube or the inner surface of the outer tube at the curved portion, and the glass bulb of the inner tube is formed. 3. The double-tube fluorescent lamp according to claim 1, wherein the inner tube and the outer tube are not in contact with each other and / or are not welded in portions other than the sealing portions at both ends.
との間に、前記隙間と連通する隙間を設けたことを特徴
とする請求項１、２又は３記載の２重管形蛍光ランプ。4. The double-tube fluorescent lamp according to claim 1, wherein a gap communicating with the gap is provided between a position where the fine particle layer is formed and a tube wall facing the tube. .
μｍであることを特徴とする請求項１、２、３又は４記
載の２重管形蛍光ランプ。5. The fine particle layer has a thickness of 0.01 to 50.
The double-tube fluorescent lamp according to claim 1, 2, 3 or 4, wherein the diameter is μm.
が０．００５〜１０μｍであることを特徴とする請求項
１、２、３、４又は５記載の２重管形蛍光ランプ。6. The double-tube fluorescent lamp according to claim 1, wherein an average particle diameter of a substance constituting the fine particle layer is 0.005 to 10 μm.
Ｏ２、ＴｉＯ２、ＭｇＯ、Ｙ２Ｏ３の中から選ばれた少
なくとも１種以上の物質により構成されていることを特
徴とする請求項１、２、３、４、５又は６記載の２重管
形蛍光ランプ。7. The method according to claim 1, wherein the fine particle layer is made of Al 2 O 3 , Si
7. The method according to claim 1, wherein the material is made of at least one material selected from the group consisting of O 2 , TiO 2 , MgO, and Y 2 O 3. Double tube fluorescent lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31284499A JP3345777B2 (en) | 1999-09-27 | 1999-09-27 | Double tube fluorescent lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31284499A JP3345777B2 (en) | 1999-09-27 | 1999-09-27 | Double tube fluorescent lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001093469A true JP2001093469A (en) | 2001-04-06 |
| JP3345777B2 JP3345777B2 (en) | 2002-11-18 |
Family
ID=18034119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31284499A Expired - Fee Related JP3345777B2 (en) | 1999-09-27 | 1999-09-27 | Double tube fluorescent lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3345777B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006019093A (en) * | 2004-06-30 | 2006-01-19 | Matsushita Electric Ind Co Ltd | Battery pack |
| JP2008288129A (en) * | 2007-05-21 | 2008-11-27 | Nec Lighting Ltd | Circular illumination lamp |
| WO2012127376A1 (en) * | 2011-03-24 | 2012-09-27 | Koninklijke Philips Electronics N.V. | Gas-discharge lamp |
-
1999
- 1999-09-27 JP JP31284499A patent/JP3345777B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006019093A (en) * | 2004-06-30 | 2006-01-19 | Matsushita Electric Ind Co Ltd | Battery pack |
| JP2008288129A (en) * | 2007-05-21 | 2008-11-27 | Nec Lighting Ltd | Circular illumination lamp |
| WO2012127376A1 (en) * | 2011-03-24 | 2012-09-27 | Koninklijke Philips Electronics N.V. | Gas-discharge lamp |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3345777B2 (en) | 2002-11-18 |
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