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JP4826613B2 - Discharge lamp - Google Patents

Discharge lamp Download PDF

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Publication number
JP4826613B2
JP4826613B2 JP2008245369A JP2008245369A JP4826613B2 JP 4826613 B2 JP4826613 B2 JP 4826613B2 JP 2008245369 A JP2008245369 A JP 2008245369A JP 2008245369 A JP2008245369 A JP 2008245369A JP 4826613 B2 JP4826613 B2 JP 4826613B2
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Prior art keywords
current collector
collector plate
metal
internal lead
glass member
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JP2010080165A (en
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茂治 細谷
尚久 池田
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Ushio Denki KK
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Ushio Denki KK
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Priority to JP2008245369A priority Critical patent/JP4826613B2/en
Priority to TW098118209A priority patent/TWI431660B/en
Priority to KR1020090059760A priority patent/KR101183301B1/en
Priority to CN2009101666396A priority patent/CN101685756B/en
Priority to SG200906322-3A priority patent/SG160305A1/en
Publication of JP2010080165A publication Critical patent/JP2010080165A/en
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Publication of JP4826613B2 publication Critical patent/JP4826613B2/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
    • H01J61/366—Seals for leading-in conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/04—Electrodes; Screens; Shields
    • H01J61/06—Main electrodes
    • H01J61/073—Main electrodes for high-pressure discharge lamps
    • H01J61/0732—Main electrodes for high-pressure discharge lamps characterised by the construction of the electrode
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/305—Flat vessels or containers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/38—Devices for influencing the colour or wavelength of the light
    • H01J61/42—Devices for influencing the colour or wavelength of the light by transforming the wavelength of the light by luminescence
    • H01J61/48—Separate coatings of different luminous materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/84—Lamps with discharge constricted by high pressure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/84—Lamps with discharge constricted by high pressure
    • H01J61/86—Lamps with discharge constricted by high pressure with discharge additionally constricted by close spacing of electrodes, e.g. for optical projection

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  • Vessels And Coating Films For Discharge Lamps (AREA)

Description

本発明は、放電ランプに関するものであり、さらに詳しくは、特に大電流用に適した気密封止構造を有する放電ランプに関するものである。   The present invention relates to a discharge lamp, and more particularly to a discharge lamp having a hermetic sealing structure particularly suitable for a large current.

放電ランプ、例えば、水銀ランプは、一般に、ランプより放射される紫外線を利用する分野、例えば光化学産業分野、半導体デバイスの製造分野、その他の分野で広く用いられている。   A discharge lamp, for example, a mercury lamp, is generally widely used in the field using ultraviolet rays emitted from the lamp, for example, the field of photochemical industry, the field of manufacturing semiconductor devices, and other fields.

大電流用の高圧水銀ランプまたは超高圧水銀ランプにおいては、発光ガスの主成分である水銀の封入量が大きくて点灯時の発光管内ガス圧が非常に高く、しかも、発熱量が大きく、従って、特に気密封止部のガラスにおいては耐熱性および耐圧性が大きいことが必要とされる。そして、点灯中においては発光管内の水銀が完全に蒸発していることが必要であり、このため点灯中の発光管内においては水銀の凝縮が生じるような低い温度部分がないことが必要である。   In high-current mercury lamps or ultra-high-pressure mercury lamps for large currents, the amount of mercury that is the main component of the luminous gas is large, the gas pressure in the arc tube during lighting is very high, and the calorific value is large. In particular, the glass of the hermetic sealing portion needs to have high heat resistance and pressure resistance. During lighting, it is necessary that the mercury in the arc tube is completely evaporated. For this reason, it is necessary that there is no low temperature portion in which the condensation of mercury occurs in the arc tube during lighting.

このようなことから、従来の高圧水銀ランプまたは超高圧水銀ランプにおいては、封止管を形成するガラスを給電用のリード棒に直接溶着することにより、封止管の気密封止を達成するいわゆるロッドシール構造ではなく、封着用の金属箔を用いたいわゆる箔シール構造が採用されている。   For this reason, in the conventional high pressure mercury lamp or ultrahigh pressure mercury lamp, the so-called hermetic sealing of the sealing tube is achieved by directly welding the glass forming the sealing tube to the lead rod for power supply. Instead of a rod seal structure, a so-called foil seal structure using a metal foil for sealing is employed.

図７は、箔シール構造を有する高圧水銀ランプの一例を示す説明図である。１は、発光管１１とこれに続く封止管１２とからなる放電容器である。この放電容器１の発光管１１内に電極２が配置され、この電極２は内部リード棒３によって支持されている。内部リード棒３は内部リード棒３を保持するガラス製の保持用筒体４によって封止管１２内に保持されている。   FIG. 7 is an explanatory view showing an example of a high-pressure mercury lamp having a foil seal structure. Reference numeral 1 denotes a discharge vessel composed of an arc tube 11 and a sealing tube 12 subsequent thereto. An electrode 2 is disposed in the arc tube 11 of the discharge vessel 1, and this electrode 2 is supported by an internal lead bar 3. The internal lead bar 3 is held in the sealing tube 12 by a glass holding cylinder 4 that holds the internal lead bar 3.

そして、内部リード棒３の電極２とは反対側の後端側は、モリブデン等の高融点金属からなる集電板５の貫通孔に挿通されて集電板５に溶接されており、この集電板５の発光管１１側の面に給電用金属箔６が溶接されている。給電用金属箔６は円柱状のガラス部材７の外周において、その周方向に離間して、当該ガラス部材７の軸方向に帯状に例えば５枚配置されている。   The rear end side of the internal lead bar 3 opposite to the electrode 2 is inserted into the through hole of the current collector plate 5 made of a refractory metal such as molybdenum and welded to the current collector plate 5. A power supply metal foil 6 is welded to the surface of the electric plate 5 on the arc tube 11 side. For example, five metal foils 6 for power feeding are arranged in a strip shape in the axial direction of the glass member 7 on the outer periphery of the cylindrical glass member 7 so as to be separated in the circumferential direction.

そして、給電用金属箔６は、集電板５に溶接された方向と反対側の他端部において、皿状の金属部材８に溶接されており、この金属部材８を介して外部リード棒９と電気的に接続されている。
外部リード棒９は、外部リード棒９を保持するガラス製の保持用筒体４１で保持され、金属部材８を貫通し、この金属部材８に溶接されて、ガラス部材７に形成された孔７１に挿入されている。 The power supply metal foil 6 is welded to the dish-shaped metal member 8 at the other end opposite to the direction welded to the current collector plate 5, and the external lead rod 9 is interposed via the metal member 8. And are electrically connected.
The external lead rod 9 is held by a glass holding cylinder 41 that holds the external lead rod 9, penetrates through the metal member 8, is welded to the metal member 8, and the hole 71 formed in the glass member 7. Has been inserted.

そして、ガラス部材７と集電板５との間にモリブデン製の金属箔Ｍ１が配置されており、内部リード棒３を保持する保持用筒体４と集電板５との間にモリブデン製の金属箔Ｍ２が配置されている。
金属箔Ｍ１は、図８（ａ）に示すように、貫通孔を有さない円盤状の金属箔であって、その直径は集電板５の直径とほぼ同じである。
金属箔Ｍ２は、図８（ｂ）に示すように、中心に内部リード３が貫通する貫通孔が形成されたリング状の金属箔であって、その直径は集電板５の直径とほぼ同じである。
なお、他方の封止管部も、同様の構造なので説明を省略する。 A metal foil M 1 made of molybdenum is disposed between the glass member 7 and the current collector plate 5, and the molybdenum-made metal foil M 1 is placed between the holding cylinder 4 that holds the internal lead rod 3 and the current collector plate 5. Metal foil M2 is disposed.
As shown in FIG. 8A, the metal foil M <b> 1 is a disc-shaped metal foil having no through holes, and the diameter thereof is substantially the same as the diameter of the current collector plate 5.
As shown in FIG. 8B, the metal foil M2 is a ring-shaped metal foil in which a through hole through which the internal lead 3 passes is formed at the center, and the diameter thereof is substantially the same as the diameter of the current collector plate 5. It is.
Since the other sealing tube portion has the same structure, the description thereof is omitted.

上記のように構成された放電容器１の発光管１１内に電極２を位置するように挿入配置する。そして、この放電容器１を、ガラス旋盤などにより周方向に回転させながら、封止管１２の外部からバーナー等を用いて加熱処理して、この封止管１２の内周とガラス部材７の外周とを給電用金属箔６を介して気密に溶着させる。
さらに、保持用筒体４と対向する部分の封止管１２のガラスも加熱処理して、この封止管１２の内周と保持用筒体４と溶着させる。
なお、他方の封止管部も、同様の構造なので説明を省略する。 The electrode 2 is inserted and disposed in the arc tube 11 of the discharge vessel 1 configured as described above. Then, the discharge vessel 1 is heated using a burner or the like from the outside of the sealing tube 12 while being rotated in the circumferential direction by a glass lathe or the like, and the inner periphery of the sealing tube 12 and the outer periphery of the glass member 7. Are hermetically welded via the power supply metal foil 6.
Furthermore, the glass of the sealing tube 12 at the portion facing the holding tube 4 is also heat-treated, and the inner periphery of the sealing tube 12 and the holding tube 4 are welded.
Since the other sealing tube portion has the same structure, the description thereof is omitted.

封止管１２の加熱処理工程において、ガラス部材７と集電板５が接すると、それぞれの部材の膨張係数の違いによって、ガラス部材７に微細なクラックが生じることがあるので、ガラス部材７と集電板５が接触しないように、ガラス部材７と集電板５との間に金属箔Ｍ１を配置している。
同じように、封止管１２の加熱処理工程において、内部リード３を保持する保持用筒体４と集電板５が接すると、それぞれの部材の膨張係数の違いによって、保持用筒体４に微細なクラックが生じることがあるので、保持用筒体４と集電板５が接触しないように、保持用筒体４と集電板５との間に金属箔Ｍ２を配置している。
なお、ランプによっては、保持用筒体４と集電板５との間に金属箔Ｍ２を配置しない構造のランプも存在する。 In the heat treatment process of the sealing tube 12, when the glass member 7 and the current collector plate 5 are in contact with each other, a minute crack may occur in the glass member 7 due to a difference in expansion coefficient between the members. A metal foil M <b> 1 is disposed between the glass member 7 and the current collector plate 5 so that the current collector plate 5 does not contact.
Similarly, in the heat treatment step of the sealing tube 12, when the holding cylinder 4 that holds the internal lead 3 and the current collector plate 5 are in contact with each other, the holding cylinder 4 is changed due to the difference in expansion coefficient of each member. Since a fine crack may occur, the metal foil M2 is disposed between the holding cylinder 4 and the current collector plate 5 so that the holding cylinder 4 and the current collector plate 5 do not contact each other.
Some lamps have a structure in which the metal foil M <b> 2 is not disposed between the holding cylinder 4 and the current collector plate 5.

しかしながら、ガラス部材７と集電板５との間に金属箔Ｍ１を配置した構造であっても、封止管１２の外部からバーナー等を用いて加熱処理する工程において、場合によってはガラス部材７の金属箔Ｍ１と接している部分にクラックが入り、点灯中に、クラックが成長し、最終的に、発光管１１内のガスがリークしたり、封止管１２が破壊されるということがあった。   However, even in the structure in which the metal foil M <b> 1 is disposed between the glass member 7 and the current collector plate 5, the glass member 7 is sometimes used in the heat treatment process using a burner or the like from the outside of the sealing tube 12. There is a case where a crack enters a portion in contact with the metal foil M1, the crack grows during lighting, and eventually the gas in the arc tube 11 leaks or the sealing tube 12 is destroyed. It was.

これは、図９に示すように、内部リード棒３の電極２とは反対側の後端側は、集電板５の貫通孔に挿通されて集電板５に溶接されるものであるが、内部リード棒３の後端側の基端３ａと集電板５の端面５ａとを一致させることが難しく、内部リード棒３の基端３ａが集電板５の端面５ａより突出して溶接される場合がある。
このような構造の場合、封止管１２の外部からバーナー等を用いて加熱処理する工程において、この突出した内部リード棒３の基端３ａが金属箔Ｍをガラス部材７側に押し圧し、押し圧された部分のガラス部材７にクラックが入るものであった。
特開２０００−１４９８７３公報 As shown in FIG. 9, the rear end side of the internal lead bar 3 opposite to the electrode 2 is inserted into the through hole of the current collector plate 5 and welded to the current collector plate 5. The base end 3a on the rear end side of the inner lead bar 3 and the end face 5a of the current collector plate 5 are difficult to match, and the base end 3a of the inner lead bar 3 protrudes from the end face 5a of the current collector plate 5 and is welded. There is a case.
In the case of such a structure, in the step of heat treatment from the outside of the sealing tube 12 using a burner or the like, the protruding base end 3a of the internal lead bar 3 presses the metal foil M toward the glass member 7 side, The glass member 7 in the pressed portion was cracked.
JP 2000-149873 A

本発明は以上のような事情に基づいてなされたものであって、その目的は、封止管内に配置されたガラス部材にクラックが発生することを防止し、最終的に、発光管のガスリークを防止し、封止管の破損を防止でき、長い使用寿命を得ることができる放電ランプを提供することになる。   The present invention has been made on the basis of the above circumstances, and its purpose is to prevent the occurrence of cracks in the glass member disposed in the sealing tube, and finally to prevent gas leakage in the arc tube. Thus, it is possible to provide a discharge lamp that can prevent the breakage of the sealed tube and obtain a long service life.

請求項１に記載の放電ランプは、発光管の両端に封止管が連設された放電容器と、前記封止管の内部に配置された柱状のガラス部材と、前記封止管の内部であって、前記ガラス部材の発光管側の端面に対向して配置された金属製の集電板と、先端が前記発光管内に伸びて、その先端に電極が設けられ、電極とは反対側の後端側が前記集電板の中心に形成された貫通孔に挿通されて前記集電板に固定された内部リード棒と、前記内部リード棒の外周と前記封止管の内周との間に配置された内部リード棒を保持するガラス製の保持用筒体と、前記ガラス部材の外周に沿って伸び、一端部が前記集電板に接続され、他端部が外部リード棒に電気的に接続された給電用金属箔とよりなる放電ランプにおいて、前記内部リード棒の後端側の基端は、前記集電板の端面より突出しており、前記ガラス部材と前記集電板との間に金属体が配置され、前記金属体は、前記内部リード棒の基端が挿入される空隙を有し、前記集電板の端面より突出した前記内部リード棒の基端の突出長をＬ１、前記金属体に設けられた空隙の前記内部リード棒の基端が突出する方向の長さをＬ２とすると、Ｌ１＜Ｌ２であることを特徴とする。   The discharge lamp according to claim 1 includes a discharge vessel in which a sealing tube is continuously provided at both ends of an arc tube, a columnar glass member disposed inside the sealing tube, and an inside of the sealing tube. A metal current collector disposed opposite the end face of the glass member on the arc tube side, a tip extending into the arc tube, and an electrode provided at the tip, on the opposite side of the electrode An inner lead bar inserted into a through hole formed in the center of the current collector plate at the rear end side and fixed to the current collector plate, and between the outer periphery of the inner lead rod and the inner periphery of the sealing tube A glass holding cylinder for holding the arranged internal lead bar, and extending along the outer periphery of the glass member, one end connected to the current collector plate, and the other end electrically connected to the external lead bar In the discharge lamp composed of the connected power supply metal foil, the proximal end of the rear end side of the internal lead bar is the A metal body disposed between the glass member and the current collector plate, the metal body having a gap into which a base end of the internal lead bar is inserted, and Assuming that the protruding length of the base end of the internal lead rod protruding from the end face of the electric plate is L1, and the length of the gap provided in the metal body in the direction in which the base end of the internal lead rod protrudes is L2, L1 < It is characterized by being L2.

請求項２に記載の放電ランプは、請求項１に記載の放電ランプであって、特に、前記金属体は、中心に貫通孔が形成された複数のリング状の金属箔が積層されたものであって、前記それぞれの金属箔の貫通孔が重なりあって連通孔が形成され、前記連通孔が前記金属体に設けられた空隙になっていることを特徴とする。   The discharge lamp according to claim 2 is the discharge lamp according to claim 1, and in particular, the metal body is formed by laminating a plurality of ring-shaped metal foils each having a through-hole formed in the center. The through holes of the respective metal foils are overlapped to form a communication hole, and the communication hole is a void provided in the metal body.

請求項３に記載の放電ランプは、請求項１に記載の放電ランプであって、特に、前記金属体は、平坦部と、当該平坦部の周辺が前記集電板の方向に折り曲げられた折り曲げ部と、からなる金属箔であって、前記金属箔の平坦部における内部リード棒側の表面と、前記金属箔の折り曲げ部の内縁によって凹部が形成され、前記凹部が前記金属体に設けられた空隙になっていることを特徴とする。   The discharge lamp according to claim 3 is the discharge lamp according to claim 1, and in particular, the metal body includes a flat portion and a bent portion in which the periphery of the flat portion is bent in the direction of the current collector plate. A recess formed by the inner lead bar side surface of the flat portion of the metal foil and the inner edge of the bent portion of the metal foil, and the recess was provided in the metal body. It is characterized by a void.

請求項１に記載の本発明の放電ランプによれば、集電板の貫通孔に内部リード棒の後端側が溶接され、この集電板と封止管の内部に配置された柱状のガラス部材との間に金属体が配置されているので、この金属体によって、ガラス部材と集電板を接することがなく隔離することができる。さらに、金属体は、内部リード棒の後端側の基端が挿入される空隙を有し、内部リード棒の基端は、集電板の端面より突出しており、集電板の端面より突出した内部リード棒の基端の突出長をＬ１、金属体に設けられた空隙の前記内部リード棒の基端が突出する方向の長さをＬ２とすると、Ｌ１＜Ｌ２であるので、封止管の外部からバーナー等を用いて加熱処理する際に、内部リード棒の後端側の基端が集電板の端面から突出した状態になっていても、内部リード棒の基端とガラス部材が接触しない構造になっているので、内部リード棒の基端がガラス部材を押し圧することがないので、ガラス部材にクラックが発生することを防止しでき、最終的に、発光管のガスリークを防止し、封止管の破損を防止でき、長い使用寿命を得ることができる。   According to the discharge lamp of the present invention as set forth in claim 1, the columnar glass member is disposed inside the current collector plate and the sealing tube, the rear end side of the internal lead bar being welded to the through hole of the current collector plate. Since the metal body is disposed between the glass member and the current collector plate, the metal body can be isolated without contacting the current collector plate. Furthermore, the metal body has a gap into which the proximal end of the rear end side of the internal lead rod is inserted, and the proximal end of the internal lead rod protrudes from the end face of the current collector plate and protrudes from the end face of the current collector plate. Since the length of protrusion of the base end of the inner lead bar is L1, and the length of the gap provided in the metal body in the direction in which the base end of the inner lead bar protrudes is L2, L1 <L2. When the heat treatment using a burner or the like is performed from the outside of the inner lead bar, even if the rear end side base end of the inner lead bar protrudes from the end face of the current collector plate, the base end of the inner lead bar and the glass member Since it is structured so as not to contact, the base end of the internal lead rod does not press the glass member, so it is possible to prevent the glass member from cracking and ultimately prevent gas leakage in the arc tube. Can prevent damage to the sealing tube and can obtain a long service life .

さらに、請求項２に記載の本発明の放電ランプによれば、金属体は、中心に貫通孔が形成された複数のリング状の金属箔が積層されたものであって、それぞれの金属箔の貫通孔が重なりあって連通孔が形成され、この連通孔が金属体に設けられた空隙になっており、この空隙に、集電板の端面より突出した内部リード棒の基端が挿入されているので、簡単な構造でありながら、確実に、ガラス部材に内部リード棒の基端が当接することを防止できる。
さらに、請求項３に記載の本発明の放電ランプによれば、金属体は、平坦部と、この平坦部の周辺が集電板の方向に折り曲げられた折り曲げ部と、からなる金属箔であって、この金属箔の平坦部における内部リード棒側の表面と金属箔の折り曲げ部の内縁によって凹部が形成され、この凹部が前記金属体に設けられた空隙になっており、この空隙に、集電板の端面より突出した前記内部リード棒の基端が挿入されているので、簡単な構造でありながら、確実に、ガラス部材に内部リード棒の基端が当接することを防止できる。 Furthermore, according to the discharge lamp of the present invention described in claim 2, the metal body is formed by laminating a plurality of ring-shaped metal foils each having a through-hole formed at the center, Through holes are overlapped to form a communication hole, and this communication hole is a space provided in the metal body, and the base end of the internal lead bar protruding from the end surface of the current collector plate is inserted into this space. Therefore, it is possible to reliably prevent the proximal end of the internal lead bar from coming into contact with the glass member while having a simple structure.
Further, according to the discharge lamp of the present invention described in claim 3, the metal body is a metal foil comprising a flat portion and a bent portion in which the periphery of the flat portion is bent in the direction of the current collector plate. A recess is formed by the surface of the flat portion of the metal foil on the side of the internal lead bar and the inner edge of the bent portion of the metal foil, and the recess is a space provided in the metal body. Since the base end of the internal lead rod protruding from the end face of the electric plate is inserted, it is possible to reliably prevent the base end of the internal lead rod from coming into contact with the glass member while having a simple structure.

本発明の放電ランプを図を用いて説明する。
図１は、本発明の放電ランプの断面図である。
１は、発光管１１とこれに続く封止管１２とからなる放電容器である。この放電容器１の発光管１１内に電極２が配置され、この電極２は、先端が発光管１１内に伸びる内部リード棒３の先端に設けられている。
内部リード棒３は、当該内部リード棒３の外周と封止管１２の内周との間に配置されたガラス製の保持用筒体４の貫通孔に挿入されて封止管１２内に保持されている。
内部リード棒３の電極２とは反対側の後端側は、モリブデン等の高融点金属からなる集電板５の中心に形成された貫通孔に挿通されて集電板５に溶接されて固定されている。 The discharge lamp of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view of a discharge lamp of the present invention.
Reference numeral 1 denotes a discharge vessel composed of an arc tube 11 and a sealing tube 12 subsequent thereto. An electrode 2 is disposed in the arc tube 11 of the discharge vessel 1, and the electrode 2 is provided at the tip of an internal lead bar 3 whose tip extends into the arc tube 11.
The internal lead rod 3 is inserted into a through hole of a glass holding cylinder 4 disposed between the outer periphery of the internal lead rod 3 and the inner periphery of the sealing tube 12 and is held in the sealing tube 12. Has been.
The rear end side of the internal lead bar 3 opposite to the electrode 2 is inserted into a through-hole formed at the center of the current collector plate 5 made of a refractory metal such as molybdenum and welded to the current collector plate 5 to be fixed. Has been.

封止管１１の内部には円柱状のガラス部材７が配置されている。
集電板５は、封止管１２の内部であって、ガラス部材７の発光管１１側の端面に対向して配置されている。
ガラス部材７は、集電板５と対向する面が平面状になっている。
この集電板５の発光管１１側の面に給電用金属箔６の一端側が溶接され、この給電用金属箔６は円柱状のガラス部材７の外周に沿って軸方向に伸びており、例えば、当該ガラス部材７の周方向に離間して帯状に５枚配置され、給電用金属箔６の集電板５に溶接された方向と反対側の他側は、皿状の金属部材８に溶接されており、この金属部材８を介して外部リード棒９電気的に接続されている。
なお、集電板５の側面に給電用金属箔６の一端側が溶接されていてもよい。 A cylindrical glass member 7 is disposed inside the sealing tube 11.
The current collecting plate 5 is disposed inside the sealing tube 12 and facing the end surface of the glass member 7 on the arc tube 11 side.
The glass member 7 has a flat surface facing the current collector plate 5.
One end side of the power supply metal foil 6 is welded to the surface of the current collector plate 5 on the arc tube 11 side, and the power supply metal foil 6 extends in the axial direction along the outer periphery of the cylindrical glass member 7. The glass member 7 is spaced in the circumferential direction and is arranged in a strip shape, and the other side opposite to the direction welded to the current collector plate 5 of the power supply metal foil 6 is welded to the dish-like metal member 8. The external lead rod 9 is electrically connected through the metal member 8.
One end side of the power supply metal foil 6 may be welded to the side surface of the current collector plate 5.

外部リード棒９は、外部リード棒９を保持するガラス製の保持用筒体４１で保持され、金属部材８を貫通し、この金属部材８に溶接されて、ガラス部材７に形成された孔７１に挿入されている。   The external lead rod 9 is held by a glass holding cylinder 41 that holds the external lead rod 9, penetrates through the metal member 8, is welded to the metal member 8, and the hole 71 formed in the glass member 7. Has been inserted.

そして、ガラス部材７と集電板５との間に金属体Ｍが配置されており、内部リード棒３を保持する保持用筒体４と集電板５との間にモリブデン製の金属箔Ｍ２が配置されている。
金属体Ｍは後段で詳細に説明する。
金属箔Ｍ２は、図８（ｂ）に示すように、中心に内部リード３が貫通する貫通孔が形成されたリング状の金属箔であって、その直径は集電板５の直径とほぼ同じである。
なお、他方の封止管部も、同様の構造なので説明を省略する。
なお、ランプによっては、保持用筒体４と集電板５との間に金属箔Ｍ２を配置しない場合もある。 A metal body M is disposed between the glass member 7 and the current collector plate 5, and a metal foil M 2 made of molybdenum between the current collector plate 5 and the holding cylinder 4 that holds the internal lead bar 3. Is arranged.
The metal body M will be described in detail later.
As shown in FIG. 8B, the metal foil M2 is a ring-shaped metal foil in which a through hole through which the internal lead 3 passes is formed at the center, and the diameter thereof is substantially the same as the diameter of the current collector plate 5. It is.
Since the other sealing tube portion has the same structure, the description thereof is omitted.
Depending on the lamp, the metal foil M <b> 2 may not be disposed between the holding cylinder 4 and the current collector plate 5.

次に、金属体Ｍの機能について詳細に説明する。
図２は、ガラス部材と金属体と集電板と内部リード棒のみを取り出して示す拡大断面図である。
図２に示すように、ガラス部材７と集電板５との間に金属体Ｍが配置されており、この金属体Ｍは、集電板５の外径、ガラス部材７の集電板５側の端面の直径と略同じ外径１０ｍｍで、中心に内部リード棒の後端側の基端の外径よりも大きい内径５ｍｍの貫通孔Ｐが形成されており、厚み０．０５ｍｍのモリブデン製の１枚の金属箔である。 Next, the function of the metal body M will be described in detail.
FIG. 2 is an enlarged cross-sectional view showing only the glass member, the metal body, the current collector plate, and the internal lead bar.
As shown in FIG. 2, a metal body M is disposed between the glass member 7 and the current collector plate 5, and this metal body M has an outer diameter of the current collector plate 5 and the current collector plate 5 of the glass member 7. A through hole P having an outer diameter of 10 mm, which is substantially the same as the diameter of the end face on the side, and an inner diameter of 5 mm larger than the outer diameter of the proximal end on the rear end side of the internal lead rod is formed in the center, and is made of molybdenum having a thickness of 0.05 mm. This is one metal foil.

また、図２に示すように、集電板５の端面５ａと内部リード棒３の基端３ａとを一致させることが難しく、僅かに、内部リード棒３の基端３ａが集電板５の端面５ａより突出するものであり、集電板５の端面５ａより突出した内部リード棒３の基端３ａの突出長をＬ１とすると、Ｌ１は０．０３３ｍｍである。
さらに、金属体Ｍに設けられた空隙Ｋの内部リード棒３の基端３ａが突出する方向の長さをＬ２とすると、Ｌ２は０．０５ｍｍである。このＬ２の長さは、１枚の金属箔の厚みである。
つまり、集電板５の端面５ａより突出した内部リード棒３の基端３ａの突出長をＬ１、金属体Ｍに設けられた空隙Ｋの内部リード棒３の基端３ａが突出する方向の長さをＬ２とすると、Ｌ１＜Ｌ２の関係を満たすものである。 Further, as shown in FIG. 2, it is difficult to match the end surface 5 a of the current collector plate 5 with the base end 3 a of the internal lead bar 3, and the base end 3 a of the internal lead bar 3 is slightly connected to the current collector plate 5. L1 protrudes from the end surface 5a, and L1 is 0.033 mm when the protruding length of the base end 3a of the internal lead bar 3 protruding from the end surface 5a of the current collector plate 5 is L1.
Furthermore, if the length of the gap K provided in the metal body M in the direction in which the base end 3a of the inner lead bar 3 protrudes is L2, L2 is 0.05 mm. The length of L2 is the thickness of one metal foil.
That is, the protruding length of the base end 3a of the internal lead bar 3 protruding from the end surface 5a of the current collector plate 5 is L1, and the length of the gap K provided in the metal body M in the direction in which the base end 3a of the internal lead bar 3 protrudes. When the length is L2, the relationship of L1 <L2 is satisfied.

この結果、封止管１２の外部からバーナー等を用いて加熱処理して、ガラス部材７と封止管１２を溶着する際に、金属体Ｍをガラス部材７と集電板５との間に配置することにより、この金属体Ｍでガラス部材７と集電板５を完全に隔離し接触することを阻止し、しかも、集電板５の端面５ａより内部リード棒３の基端３ａが突出しても、突出した部分の基端３ａがガラス部材７に当接しないので、ガラス部材７にクラックが発生することを防止でき、最終的に、発光管のガスリークを防止し、封止管の破損を防止でき、長い使用寿命を得ることができる。
なお、金属体Ｍ、集電板５、ガラス部材７の組み合わせとしては、例えば、金属体Ｍ、集電板５の外径と、ガラス部材７の集電板５側の端面の直径が略同じ１５ｍｍで、金属体Ｍの貫通穴の内径が６ｍｍとなっている組み合わせでも同様の効果が得られる。また、例えば、金属体Ｍ、集電板５の外径と、ガラス部材７の集電板５側の端面の直径が略同じ３０ｍｍで、金属体Ｍの貫通穴の内径が６ｍｍとなっている組み合わせでも同様の効果が得られる。 As a result, when the glass member 7 and the sealing tube 12 are welded by heat treatment from the outside of the sealing tube 12 using a burner or the like, the metal body M is placed between the glass member 7 and the current collector plate 5. This arrangement prevents the metal member M from completely separating and contacting the glass member 7 and the current collector plate 5, and the base end 3 a of the internal lead bar 3 protrudes from the end surface 5 a of the current collector plate 5. However, since the base end 3a of the protruding portion does not contact the glass member 7, it is possible to prevent the glass member 7 from cracking and finally prevent gas leakage of the arc tube and break the sealing tube Can be prevented, and a long service life can be obtained.
In addition, as a combination of the metal body M, the current collector plate 5, and the glass member 7, for example, the outer diameter of the metal body M and the current collector plate 5 is substantially the same as the diameter of the end surface of the glass member 7 on the current collector plate 5 side. The same effect can be obtained by a combination of 15 mm and the inner diameter of the through hole of the metal body M being 6 mm. Further, for example, the outer diameter of the metal body M and the current collector plate 5 and the diameter of the end surface of the glass member 7 on the current collector plate 5 side are substantially the same 30 mm, and the inner diameter of the through hole of the metal body M is 6 mm. The same effect can be obtained by combining.

図３は、本願発明の放電ランプの他の実施例である、ガラス部材と金属体と集電板と内部リード棒のみを取り出して示す拡大断面図であり、図４は、図３に示す金属体を構成する金属箔のみ取り出した斜視図である。
図３に示すように、ガラス部材７と集電板５との間に金属体Ｍが配置されており、この金属体Ｍは、中心に、集電板５の端面５ａより突出した内部リード棒３の基端３ａが挿入される空隙Ｋを有している。
金属体Ｍは、図４に示す中心に貫通孔Ｐが形成されたリング状の金属箔Ｍａを３枚積層した構造である。
集電板５はモリブデン製の金属板であって、厚み２ｍｍ、外径１０ｍｍで中心に内部リード３が相通される内径５ｍｍの貫通孔が形成されている。
金属箔Ｍａは、図４に示すように、集電板５の外径と、ガラス部材７の集電板５側の端面の直径と略同じ外径１０ｍｍで、中心に内径５ｍｍの貫通孔Ｐが形成されており、厚み０．０１５ｍｍのモリブデン製の金属箔である。
図３に示すように、金属体Ｍは、３枚の金属箔Ｍａの貫通孔Ｐが重なりあって連通孔となっており、この連通孔が金属体Ｍに設けられた空隙Ｋとなっている。 FIG. 3 is an enlarged cross-sectional view showing only a glass member, a metal body, a current collector plate, and an internal lead bar, which is another embodiment of the discharge lamp of the present invention, and FIG. 4 is a view of the metal shown in FIG. It is the perspective view which took out only the metal foil which comprises a body.
As shown in FIG. 3, a metal body M is disposed between the glass member 7 and the current collector plate 5, and the metal body M has an internal lead bar protruding from the end surface 5 a of the current collector plate 5 at the center. 3 has a gap K into which the base end 3a is inserted.
The metal body M has a structure in which three ring-shaped metal foils Ma each having a through hole P formed at the center shown in FIG.
The current collecting plate 5 is a metal plate made of molybdenum, and has a thickness of 2 mm, an outer diameter of 10 mm, and a through-hole with an inner diameter of 5 mm through which the internal lead 3 communicates.
As shown in FIG. 4, the metal foil Ma has a through hole P having an outer diameter of 10 mm, which is substantially the same as the outer diameter of the current collector plate 5 and the end face of the glass member 7 on the current collector plate 5 side. Is a metal foil made of molybdenum having a thickness of 0.015 mm.
As shown in FIG. 3, in the metal body M, the through holes P of the three metal foils Ma overlap to form a communication hole, and the communication hole is a gap K provided in the metal body M. .

また、図３に示すように、集電板５の端面５ａと内部リード棒３の基端３ａとを一致させることが難しく、僅かに、内部リード棒３の基端３ａが集電板５の端面５ａより突出するものであり、集電板５の端面５ａより突出した内部リード棒３の基端３ａの突出長をＬ１とすると、Ｌ１は０．０３３ｍｍである。
さらに、金属体Ｍに設けられた空隙Ｋの内部リード棒３の基端３ａが突出する方向の長さをＬ２とすると、Ｌ２は０．０４５ｍｍである。
図３では、説明のために、それぞれの金属箔Ｍａの間には空隙が形成されているように描かれているが、実際には空隙はなく金属箔Ｍａは密着しており、このＬ２の長さは、３枚の金属箔Ｍａの合計の厚みと等しいものである。
つまり、集電板５の端面５ａより突出した内部リード棒３の基端３ａの突出長をＬ１、金属体Ｍに設けられた空隙Ｋの内部リード棒３の基端３ａが突出する方向の長さをＬ２とすると、Ｌ１＜Ｌ２の関係を満たすものである。 Further, as shown in FIG. 3, it is difficult to match the end surface 5 a of the current collector plate 5 with the base end 3 a of the internal lead bar 3, and the base end 3 a of the internal lead bar 3 slightly touches the current collector plate 5. L1 protrudes from the end surface 5a, and L1 is 0.033 mm when the protruding length of the base end 3a of the internal lead bar 3 protruding from the end surface 5a of the current collector plate 5 is L1.
Furthermore, if the length of the gap K provided in the metal body M in the direction in which the base end 3a of the inner lead bar 3 protrudes is L2, L2 is 0.045 mm.
In FIG. 3, for the sake of explanation, it is depicted that gaps are formed between the respective metal foils Ma, but in reality there is no gap and the metal foil Ma is in close contact, and this L2 The length is equal to the total thickness of the three metal foils Ma.
That is, the protruding length of the base end 3a of the internal lead bar 3 protruding from the end surface 5a of the current collector plate 5 is L1, and the length of the gap K provided in the metal body M in the direction in which the base end 3a of the internal lead bar 3 protrudes. When the length is L2, the relationship of L1 <L2 is satisfied.

この結果、封止管１２の外部からバーナー等を用いて加熱処理して、ガラス部材７と封止管１２を溶着する際に、金属体Ｍをガラス部材７と集電板５との間に配置することにより、この金属体Ｍでガラス部材７と集電板５を完全に隔離し接触することを阻止し、しかも、集電板５の端面５ａより内部リード棒３の基端３ａが突出しても、突出した部分の基端３ａの基端面３ａがガラス部材７に当接しないので、ガラス部材７にクラックが発生することを防止しでき、最終的に、発光管のガスリークを防止し、封止管の破損を防止でき、長い使用寿命を得ることができる。   As a result, when the glass member 7 and the sealing tube 12 are welded by heat treatment from the outside of the sealing tube 12 using a burner or the like, the metal body M is placed between the glass member 7 and the current collector plate 5. This arrangement prevents the metal member M from completely separating and contacting the glass member 7 and the current collector plate 5, and the base end 3 a of the internal lead bar 3 protrudes from the end surface 5 a of the current collector plate 5. However, since the base end surface 3a of the base end 3a of the protruding portion does not contact the glass member 7, it is possible to prevent the glass member 7 from cracking, and finally prevent gas leakage of the arc tube, Damage to the sealing tube can be prevented, and a long service life can be obtained.

なお、上記の実施例では、金属体Ｍは、貫通孔Ｐを有する金属箔Ｍａを３枚積層した構造であるが、集電板５の端面５ａより突出する内部リード棒３の基端３ａの長さに応じて、金属箔Ｍａの積層枚数を適宜変更してもよい。   In the above embodiment, the metal body M has a structure in which three metal foils Ma having the through holes P are laminated, but the base end 3a of the internal lead bar 3 protruding from the end face 5a of the current collector plate 5 is used. Depending on the length, the number of stacked metal foils Ma may be changed as appropriate.

図５は、他の実施形態の金属体を用いた場合のガラス部材と金属体と集電板と内部リード棒のみを取り出して示す拡大断面図である。
図５では、集電板５の端面５ａより突出する内部リード棒３の基端３ａの長さＬ１より、金属体Ｍに設けられた空隙Ｋの内部リード棒３の基端３ａが突出する方向の長さＬ２の方が長い構造であり、図８（ａ）に示すような貫通孔がない円盤状の金属箔Ｍ１を、複数積層された金属箔Ｍａのうち最も集電板５に近い金属箔Ｍａの集電板５側に配置したものである。
このような放電ランプでは、封止管を加熱処理する際に、その貫通孔がない金属箔Ｍ１は、内部リード棒３の基端３ａによって、空隙Ｋ内に入り込むように変形する。
しかし、Ｌ１＜Ｌ２であるため、その貫通孔がない金属箔Ｍ１が変形しても、内部リード棒３の基端３ａとガラス部材７が確実に接触しない構造になり、ガラス部材７にクラックが発生することを防止できる。 FIG. 5 is an enlarged cross-sectional view showing only a glass member, a metal body, a current collector plate, and an internal lead bar when a metal body according to another embodiment is used.
In FIG. 5, the direction in which the base end 3a of the internal lead bar 3 of the gap K provided in the metal body M protrudes from the length L1 of the base end 3a of the internal lead bar 3 protruding from the end surface 5a of the current collector plate 5. The length L2 has a longer structure, and a disc-shaped metal foil M1 having no through hole as shown in FIG. 8A is a metal closest to the current collector plate 5 among the plurality of stacked metal foils Ma. It is arranged on the current collecting plate 5 side of the foil Ma.
In such a discharge lamp, when heat-treating the sealing tube, the metal foil M1 having no through hole is deformed so as to enter the gap K by the base end 3a of the internal lead bar 3.
However, since L1 <L2, even if the metal foil M1 without the through hole is deformed, the base end 3a of the internal lead bar 3 and the glass member 7 are not in contact with each other, and the glass member 7 is cracked. It can be prevented from occurring.

なお、図示はしないが、図８（ａ）に示すような貫通孔がない円盤状の金属箔Ｍ１を、図３に示す金属箔Ｍａの間に配置しても、封止管を加熱処理する際に、その貫通孔がない金属箔Ｍ１は、内部リード棒３の基端３ａによって、空隙Ｋ内に入り込むように変形するが、金属体Ｍａの合計の厚み（この場合、金属体Ｍａが全て密着すると金属体Ｍａに設けられた空隙Ｋの内部リード棒３の基端３ａが突出する方向の長さＬ２と同じになる）Ｌ２が、集電板５の端面５ａより突出する内部リード棒３の基端３ａの長さＬ１よりも大きいため、内部リード棒３の基端３ａとガラス部材７が確実に接触しない構造になり、ガラス部材７にクラックが発生することを防止できる。   Although not shown, the sealing tube is heat-treated even when the disc-shaped metal foil M1 having no through hole as shown in FIG. 8A is arranged between the metal foils Ma shown in FIG. At this time, the metal foil M1 having no through-hole is deformed so as to enter the gap K by the base end 3a of the internal lead bar 3, but the total thickness of the metal body Ma (in this case, all the metal bodies Ma are The inner lead rod 3 protruding from the end face 5a of the current collector plate 5) L2 becomes the same as the length L2 of the gap K provided in the metal body Ma in the direction in which the proximal end 3a of the inner lead rod 3 protrudes. Since the base end 3a of the internal lead bar 3 and the glass member 7 are not in contact with each other, the glass member 7 can be prevented from cracking.

図６は、本願発明の放電ランプの他の実施例である、ガラス部材と金属体と集電板と内部リード棒のみを取り出して示す拡大断面図である。
図６に示すように、ガラス部材７と集電板５との間に金属体Ｍが配置されており、この金属体Ｍは、１枚の金属箔Ｍｂの周辺を折り曲げ加工した構造である。
集電板５はモリブデン製の金属板であって、厚み２ｍｍ、外径１０ｍｍで中心に内部リード３が相通される内径５ｍｍの貫通孔が形成されている。
ガラス部材７は、その集電板５側の端面の直径が１０ｍｍである。
金属箔Ｍｂは、平坦部Ｍｂ１と、この平坦部Ｍｂ１の周辺が集電板の方向に折り曲げられた折り曲げ部Ｍｂ２からなるものであり、平坦部Ｍｂ１における内部リード棒３側の表面Ｍｂ１０と折り曲げ部Ｍｂ２の内縁Ｍｂ２０によって凹部Ｋ２が形成され、この凹部Ｋ２に、集電板５の端面５ａより突出した内部リード棒３の基端３ａが挿入されている。
この金属箔Ｍｂは、厚みが０．１０ｍｍ、外径が１０ｍｍ、折り曲げ部Ｍｂ２の内縁ｍｂ２０の開口径が７ｍｍである。 FIG. 6 is an enlarged sectional view showing only a glass member, a metal body, a current collector plate and an internal lead bar, which is another embodiment of the discharge lamp of the present invention.
As shown in FIG. 6, the metal body M is arrange | positioned between the glass member 7 and the current collecting plate 5, and this metal body M is the structure which bent the periphery of one metal foil Mb.
The current collecting plate 5 is a metal plate made of molybdenum, and has a thickness of 2 mm, an outer diameter of 10 mm, and a through-hole with an inner diameter of 5 mm through which the internal lead 3 communicates.
As for the glass member 7, the diameter of the end surface at the side of the current collecting plate 5 is 10 mm.
The metal foil Mb is composed of a flat portion Mb1 and a bent portion Mb2 in which the periphery of the flat portion Mb1 is bent in the direction of the current collector plate, and the surface Mb10 on the inner lead bar 3 side in the flat portion Mb1 and the bent portion. A recess K2 is formed by the inner edge Mb20 of Mb2, and the base end 3a of the internal lead bar 3 protruding from the end surface 5a of the current collector plate 5 is inserted into the recess K2.
This metal foil Mb has a thickness of 0.10 mm, an outer diameter of 10 mm, and an opening diameter of the inner edge mb20 of the bent portion Mb2 of 7 mm.

また、図６に示すように、集電板５の端面５ａより突出した内部リード棒３の基端３ａの突出長をＬ１とすると、Ｌ１は０．０３３ｍｍである。
さらに、金属体Ｍに設けられた空隙Ｋである凹部Ｋ２の内部リード棒３の基端３ａが突出する方向の長さをＬ２とすると、Ｌ２は０．０４５ｍｍである。この実施例の場合、Ｌ２の長さは、平坦部Ｍｂ１の表面Ｍｂ１０から折り曲げ部Ｍｂ２の内縁Ｍｂ２０の集電板５側の先端部との間の長さのことである。
つまり、集電板５の端面５ａより突出した内部リード棒３の基端３ａの突出長をＬ１、金属体Ｍに設けられた空隙Ｋの内部リード棒３の基端３ａが突出する方向の長さをＬ２とすると、Ｌ１＜Ｌ２の関係を満たすものである。
この結果、内部リード棒３の基端３ａが集電板５の端面５ａより突出しても、その基端３ａの突出した部分は、金属箔Ｍｂの凹部Ｋ２に挿入され、内部リード棒３の基端３ａがガラス部材７には当接しない状態になっている。 Further, as shown in FIG. 6, if the protruding length of the base end 3a of the internal lead bar 3 protruding from the end face 5a of the current collector plate 5 is L1, L1 is 0.033 mm.
Furthermore, if the length in the direction in which the base end 3a of the inner lead bar 3 of the recess K2 that is the gap K provided in the metal body M protrudes is L2, L2 is 0.045 mm. In the case of this embodiment, the length of L2 is the length between the surface Mb10 of the flat part Mb1 and the tip of the inner edge Mb20 of the bent part Mb2 on the current collector plate 5 side.
That is, the protruding length of the base end 3a of the internal lead bar 3 protruding from the end surface 5a of the current collector plate 5 is L1, and the length of the gap K provided in the metal body M in the direction in which the base end 3a of the internal lead bar 3 protrudes. When the length is L2, the relationship of L1 <L2 is satisfied.
As a result, even if the base end 3 a of the internal lead bar 3 protrudes from the end surface 5 a of the current collector plate 5, the protruding portion of the base end 3 a is inserted into the recess K 2 of the metal foil Mb. The end 3 a is not in contact with the glass member 7.

この結果、封止管１２の外部からバーナー等を用いて加熱処理して、ガラス部材７と封止管１２を溶着する際に、金属体Ｍをガラス部材７と集電板５との間に配置することにより、この金属体Ｍでガラス部材７と集電板５を完全に隔離し接触することを阻止し、しかも、集電板５の端面５ａより内部リード棒３の基端３ａが突出しても、突出した部分の基端３ａがガラス部材７に当接しないので、ガラス部材７にクラックが発生することを防止しでき、最終的に、発光管のガスリークを防止し、封止管の破損を防止でき、長い使用寿命を得ることができる。   As a result, when the glass member 7 and the sealing tube 12 are welded by heat treatment from the outside of the sealing tube 12 using a burner or the like, the metal body M is placed between the glass member 7 and the current collector plate 5. This arrangement prevents the metal member M from completely separating and contacting the glass member 7 and the current collector plate 5, and the base end 3 a of the internal lead bar 3 protrudes from the end surface 5 a of the current collector plate 5. However, since the base end 3a of the protruding portion does not contact the glass member 7, it is possible to prevent the glass member 7 from cracking, and finally prevent gas leakage of the arc tube, Breakage can be prevented and a long service life can be obtained.

本願発明の放電ランプの説明図である。It is explanatory drawing of the discharge lamp of this invention. 本願発明の放電ランプのガラス部材と金属体と集電板と内部リード棒のみを取り出して示す拡大断面図である。It is an expanded sectional view which takes out and shows only the glass member of the discharge lamp of this invention, a metal body, a current collecting plate, and an internal lead bar. 本願発明の放電ランプのガラス部材と金属体と集電板と内部リード棒のみを取り出して示す拡大断面図である。It is an expanded sectional view which takes out and shows only the glass member of the discharge lamp of this invention, a metal body, a current collecting plate, and an internal lead bar. 図３に示す金属体を構成する金属箔のみ取り出した斜視図である。It is the perspective view which took out only the metal foil which comprises the metal body shown in FIG. 本願発明の放電ランプのガラス部材と金属体と集電板と内部リード棒のみを取り出して示す拡大断面図である。It is an expanded sectional view which takes out and shows only the glass member of the discharge lamp of this invention, a metal body, a current collecting plate, and an internal lead bar. 本願発明の放電ランプの他の実施例である、ガラス部材と金属体と集電板と内部リード棒のみを取り出して示す拡大断面図でありFIG. 4 is an enlarged cross-sectional view showing only a glass member, a metal body, a current collector plate, and an internal lead bar, which is another embodiment of the discharge lamp of the present invention. 従来の放電ランプの説明図である。It is explanatory drawing of the conventional discharge lamp. 図７に示す放電ランプの金属箔のみ出した斜視図である。It is the perspective view which took out only the metal foil of the discharge lamp shown in FIG. 集電板と内部リードの固定構造を示す説明図である。It is explanatory drawing which shows the fixation structure of a current collecting plate and an internal lead.

符号の説明Explanation of symbols

１ 放電容器
１１ 発光管
１２ 封止管
２ 電極
３ 内部リード棒
４ 保持用筒体
５ 集電板
６ 給電用金属箔
７ ガラス部材
８ 金属部材
９ 外部リード棒 DESCRIPTION OF SYMBOLS 1 Discharge vessel 11 Arc tube 12 Sealing tube 2 Electrode 3 Internal lead bar 4 Holding cylinder 5 Current collector plate 6 Power supply metal foil 7 Glass member 8 Metal member 9 External lead rod

Claims (3)

発光管の両端に封止管が連設された放電容器と、
前記封止管の内部に配置された柱状のガラス部材と、
前記封止管の内部であって、前記ガラス部材の発光管側の端面に対向して配置された金属製の集電板と、
先端が前記発光管内に伸びて、その先端に電極が設けられ、電極とは反対側の後端側が前記集電板の中心に形成された貫通孔に挿通されて前記集電板に固定された内部リード棒と、
前記内部リード棒の外周と前記封止管の内周との間に配置された内部リード棒を保持するガラス製の保持用筒体と、
前記ガラス部材の外周に沿って伸び、一端部が前記集電板に接続され、他端部が外部リード棒に電気的に接続された給電用金属箔とよりなる放電ランプにおいて、
前記内部リード棒の後端側の基端は、前記集電板の端面より突出しており、
前記ガラス部材と前記集電板との間に金属体が配置され、
前記金属体は、前記内部リード棒の基端が挿入される空隙を有し、
前記集電板の端面より突出した前記内部リード棒の基端の突出長をＬ１、
前記金属体に設けられた空隙の前記内部リード棒の基端が突出する方向の長さをＬ２とすると、
Ｌ１＜Ｌ２である
ことを特徴とする放電ランプ。 A discharge vessel in which sealing tubes are connected to both ends of the arc tube;
A columnar glass member disposed inside the sealing tube;
A metal current collector disposed inside the sealing tube and facing an end surface of the glass member on the arc tube side;
A tip extends into the arc tube, an electrode is provided at the tip, and a rear end opposite to the electrode is inserted into a through-hole formed in the center of the current collector plate and fixed to the current collector plate. An internal lead bar;
A holding cylinder made of glass for holding the internal lead bar disposed between the outer periphery of the inner lead bar and the inner periphery of the sealing tube;
In the discharge lamp, which extends along the outer periphery of the glass member, one end is connected to the current collector plate, and the other end is electrically connected to an external lead rod and a metal foil for feeding,
The base end on the rear end side of the internal lead rod protrudes from the end face of the current collector plate,
A metal body is disposed between the glass member and the current collector plate,
The metal body has a gap into which the proximal end of the internal lead rod is inserted,
The protruding length of the base end of the internal lead bar protruding from the end face of the current collector plate is L1,
When the length in the direction in which the base end of the internal lead bar protrudes in the gap provided in the metal body is L2,
A discharge lamp characterized by L1 <L2. 前記金属体は、中心に貫通孔が形成された複数のリング状の金属箔が積層されたものであって、
前記それぞれの金属箔の貫通孔が重なりあって連通孔が形成され、
前記連通孔が前記金属体に設けられた空隙になっていることを特徴とする請求項１に記載の放電ランプ。 The metal body is a laminate of a plurality of ring-shaped metal foils having a through-hole formed at the center,
The through holes of the respective metal foils overlap to form a communication hole,
The discharge lamp according to claim 1, wherein the communication hole is a gap provided in the metal body. 前記金属体は、平坦部と、当該平坦部の周辺が前記集電板の方向に折り曲げられた折り曲げ部と、からなる金属箔であって、
前記金属箔の平坦部における内部リード棒側の表面と、前記金属箔の折り曲げ部の内縁によって凹部が形成され、
前記凹部が前記金属体に設けられた空隙になっていることを特徴とする請求項１に記載の放電ランプ。 The metal body is a metal foil comprising a flat portion and a bent portion in which the periphery of the flat portion is bent in the direction of the current collector plate,
A concave portion is formed by the inner lead bar side surface in the flat portion of the metal foil and the inner edge of the bent portion of the metal foil,
The discharge lamp according to claim 1, wherein the concave portion is a gap provided in the metal body.
JP2008245369A 2008-09-25 2008-09-25 Discharge lamp Active JP4826613B2 (en)

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