201013739 六、發明說明： 【發明所屬之技術領域】 本發明係關於放電燈，更詳而言之，係關於尤其適於 •大電流用之具有氣密密封構造的放電燈。 【先前技術】 一般而言，放電燈（例如水銀燈）在利用由燈所放射 φ 的紫外線的領域、例如光化學產業領域、半導體元件的製 造領域、其他領域已被廣泛使用。 在大電流用的高壓水銀燈或超高壓水銀燈中，作爲發 光氣體之主成分的水銀封入量大、亮燈時的發光管內氣體 壓力非常高，而且發熱量大，因此，尤其在氣密密封部的 玻璃中，必須耐熱性及耐壓性較大。而且，在亮燈中，必 須發光管內的水銀完全蒸發，因此在亮燈中的發光管內， 必須不具有會發生水銀凝縮之類的較低溫度部分。 φ 由此，在習知之高壓水銀燈或超高壓水銀燈中，並非 採用藉由將形成密封管的玻璃直接熔接在供電用的引線棒 ，以達成密封管之氣密密封之所謂的桿密封（rod seal ) 構造，而係採用使用封接用金屬箔之所謂的箔密封構造。 第7圖係顯示具有箔密封構造之高壓水銀燈之一例的 說明圖。1係由發光管11及與其接續的密封管12所構成 的放電容器。在該放電容器1的發光管11內配置電極2 ，該電極2係藉由內部引線棒3予以支持。內部引線棒3 係藉由保持內部引線棒3的玻璃製保持用筒體4而被保持 201013739 在密封管12內。 接著’內部引線棒3之與電極2呈相反側的後端側係 被插通在由鉬等高熔點金屬所構成的集電板5的貫穿孔且 被熔接在集電板5，在該集電板5之發光管U側之面熔 接有供電用金屬箔6。供電用金屬箔6係在圓柱狀玻璃構 件7的外周，朝其圓周方向間離，且在該玻璃構件7的軸 方向以帶狀配置有例如5枚。 接著，供電用金屬箔6係在與被熔接在集電板5之方 向呈相反側的另一端部被熔接在盤狀金屬構件8，透過該 金屬構件8而與外部引線棒9作電性連接。 外部引線棒9係利用保持外部引線棒9的玻璃製保持 用筒體41予以保持，貫穿金屬構件8而被熔接在該金屬 構件8，且被插入在形成於玻璃構件7的孔7 1。 接著，在玻璃構件7與集電板5之間配置有鉬製的金 屬箔Ml，在保持內部引線棒3的保持用筒體4與集電板 5之間配置有鉬製的金屬箔M2。 如第8圖（a)所示，金屬箔Ml係不具有貫穿孔的 圓盤狀金屬箔，其直徑與集電板5的直徑大致相同。 如第8圖（b )所示，金屬箔M2係在中心形成有供 內部引線3貫穿的貫穿孔的環狀金屬箔，其直徑與集電板 5的直徑大致相同。 其中，另一方的密封管部亦爲相同構造，故省略說明 〇 在如上所述所構成的放電容器1的發光管11內，以 -6 - 201013739 將電極2位於其內的方式作揷入配置。接著，一面使該放 電容器1藉由玻璃旋盤等而朝圓周方向旋轉，一面由密封 管12的外部使用燃燒器等作加熱處理，使該密封管12的 內周與玻璃構件7的外周透過供電用金屬箔6而作氣密式 熔接。 此外，與保持用筒體4相對向的部分的密封管12的 玻璃亦作加熱處理’使該密封管12的內周與保持用筒體 • 4相熔接。 其中，另一方的密封管部亦爲相同構造，故省略說明 〇 在密封管12的加熱處理工程中，若玻璃構件7與集 電板5相接’因各自構件的膨脹係數不同，而會有在玻璃 構件7發生微細裂痕的情形，因此以玻璃構件7與集電板 5不相接觸的方式’在玻璃構件7與集電板5之間配置金 屬箱Μ 1。 ® 相同地，在密封管12的加熱處理工程中，若保持內 部引線3的保持用筒體4與集電板5相接，因各自構件的 膨脹係數不同’而會有在保持用筒體4發生微細裂痕的情 形，因此以保持用筒體4與集電板5不相接觸的方式，在 保持用筒體4與集電板5之間配置金屬箔M2。 其中，依燈的不同，亦存在有在保持用筒體4與集電 板5之間未配置金屬箔M2的構造的燈。 但是’即使爲在玻璃構件7與集電板5之間配置有金 屬箱Ml的構造，在由密封管12的外部使用燃燒器等作 201013739 加熱處理的工程中，視情況的不同，會在玻璃構件7之與 金屬箔Ml相接的部分發生裂痕，且裂痕會在亮燈中成長 ，最後會發生發光管11內的氣體漏洩，或密封管12被破 壞的情形。 此係如第9圖所示，內部引線棒3之與電極2呈相反 側的後端側係被插通在集電板5的貫穿孔而被熔接在集電 板5，但是難以使內部引線棒3之後端側的基端3a與集 電板5的端面5a相一致，而會有內部引線棒3的基端3a 比集電板5的端面5a更爲突出而被熔接的情形。 在如上所示之構造的情形下，在由密封管12的外部 使用燃燒器等作加熱處理的工程中，該突出的內部引線棒 3的基端3a會將金屬箔Μ按壓在玻璃構件7側，而在所 被按壓部分的玻璃構件7發生裂痕。 (專利文獻1)日本特開2000-149873公報 【發明內容】 (發明所欲解決之課題） 本發明係基於以上情形所硏創者，其目的在於提供一 種防止在被配置於密封管內的玻璃構件發生裂痕，且在最 後可防止發光管的氣體漏洩，防止密封管破損，而可獲得 長使用壽命的放電燈。 (解決課題之手段） 申請專利範圍第1項之放電燈係由以下所構成：在發 -8- 201013739 光管的兩端連設有密封管的放電容器；配置在前述密封管 內部的柱狀玻璃構件；在前述密封管的內部且爲前述玻璃 構件之發光管側之端面相對向配置的金屬製集電板；前端 朝前述發光管內延伸，在其前端設有電極，與電極呈相反 側的後端側被插通在形成於前述集電板中心的貫穿孔而固 定在前述集電板的內部引線棒；用以保持被配置在前述內 部引線棒的外周與前述密封管的內周之間之內部引線棒的 φ 玻璃製保持用筒體；及沿著前述玻璃構件的外周延伸，一 端部與前述集電板相連接，另一端部與外部引線棒作電性 連接的供電用金屬箔，其特徵爲：前述內部引線棒之後端 側的基端係比前述集電板的端面更爲突出，在前述玻璃構 件與前述集電板之間配置金屬體，前述金屬體係具有供插 入前述內部引線棒之基端的空隙，若將比前述集電板的端 面更爲突出的前述內部引線棒之基端的突出長度設爲L1 ，將設在前述金屬體之空隙之前述內部引線棒的基端所突 Φ 出的方向的長度設爲L2時，爲L1CL2。 申請專利範圍第2項之放電燈係申請專利範圍第1項 之放電燈，尤其前述金屬體係層積有在中心形成有貫穿孔 之複數環狀金屬箔者，前述各個金屬箔的貫穿孔相重疊而 形成有連通孔，前述連通孔形成爲設在前述金屬體的空隙 〇 申請專利範圍第3項之放電燈係申請專利範圍第1項 之放電燈，尤其前述金屬體係由平坦部、及該平坦部的周 邊在前述集電板的方向彎曲的彎曲部所構成的金屬箔’藉 -9- 201013739 由前述金屬箔之平坦部中之內部引線棒側的表面與前述金 屬箔之彎曲部的內緣形成凹部，前述凹部形成爲設在前述 金屬體的空隙。 (發明之效果） - 根據申請專利範圍第1項之本發明之放電燈，由於在 集電板的貫穿孔熔接內部引線棒的後端側，且在該集電板 與配置在密封管之內部的柱狀玻璃構件之間配置有金靥體 @ ，因此藉由該金屬體，可使玻璃構件與集電板不會相接而 予以隔離。此外，金屬體係具有供插入內部引線棒之後端 側之基端的空隙，內部引線棒的基端係比集電板的端面更 爲突出，若將比集電板的端面更爲突出的內部引線棒之基 端的突出長度設爲L1，將設在金屬體之空隙之前述內部 引線棒的基端所突出的方向的長度設爲L2時，爲L1<L2 ，因此在由密封管的外部使用燃燒器等作加熱處理時，即 使形成爲內部引線棒之後端側的基端由集電板的端面更爲 @ 突出的狀態，亦形成爲內部引線棒的基端與玻璃構件不會 接觸的構造，因此不會有內部引線棒的基端按壓玻璃構件 的情形，因此可防止在玻璃構件發生裂痕，最後可防止發 光管的氣體漏洩，防止密封管破損，而可獲得長使用壽命 〇 此外，根據申請專利範圍第2項之本發明之放電燈， 金屬體係層積有在中心形成有貫穿孔之複數環狀金屬箔者 ’各個金屬箔的貫穿孔相重疊而形成有連通孔，該連通孔 -10- 201013739 形成爲設在金屬體的空隙’在該空隙被插入有比集電板的 端面更爲突出之內部引線棒的基端’因此可爲簡單的構造 ，同時可確實地防止在玻璃構件抵接內部引線棒的基端。 此外，根據申請專利範圍第3項之本發明之放電燈， 金屬體係由平坦部、及該平坦部的周邊在前述集電板的方 向彎曲的彎曲部所構成的金屬箔，藉由該金屬箔之平坦部 中之內部引線棒側的表面與金屬箔之彎曲部的內緣而形成 • 凹部，該凹部形成爲設在前述金屬體的空隙，在該空隙被 插入有比集電板的端面更爲突出之前述內部引線棒的基端 ，因此可爲簡單的構造，同時可確實地防止在玻璃構件抵 接內部引線棒的基端。 【實施方式】 使用圖式說明本發明之放電燈。 第1圖係本發明之放電燈的剖面圖。 • 1係由發光管11及與其接續的密封管12所構成的放 電容器。在該放電容器1的發光管11內配置電極2，該 . 電極2係被設在前端朝發光管11內延伸的內部引線棒3 的前端。 內部引線棒3係被插入在被配置於該內部引線棒3之 外周與密封管12之內周之間的玻璃製保持用筒體4的貫 穿孔而被保持在密封管12內。 內部引線棒3之與電極2呈相反側的後端側係被插通 在形成於由鉬等高熔點金屬所構成之集電板5之中心的貫 -11 - 201013739 穿孔，而被熔接固定在集電板5。 在密封管11的內部配置有圓柱狀的玻璃構件7。 集電板5係在密封管12的內部且爲玻璃構件7之發 光管1 1側的端面相對向配置。 玻璃構件7之與集電板5相對向的面呈平面狀。 在該集電板5之發光管11側的面熔接供電用金屬箱 6的一端側，該供電用金屬箱6係沿著圓柱狀玻璃構件7 的外周而以軸方向延伸，例如，在該玻璃構件7的圓周方 _ 向間離而以帶狀配置5枚，供電用金屬箔6之與被熔接在 集電板5的方向呈相反側的另一側係被熔接在盤狀金屬構 件8，且透過該金屬構件8而與外部引線棒9作電性連接 〇 其中，亦可在集電板5的側面熔接供電用金屬箔6的 一端側。 外部引線棒9係利用保持外部引線棒9的玻璃製保持 用筒體41予以保持，貫穿金屬構件8而被熔接於該金屬 ® 構件8’被插入在形成於玻璃構件7的孔71。 接著’在玻璃構件7與集電板5之間配置有金屬體Μ ，在保持內部引線棒3的保持用筒體4與集電板5之間配 置有鉬製的金屬箔M2。 金屬體Μ係在後段詳加說明。 如第8圖（b )所示，金屬箔m2係在中心形成有供 內部引線棒3貫穿的貫穿孔的環狀金屬箔，其直徑係與集 電板5的直徑大致相同。 -12- 201013739 其中，另一方的密封管部亦爲相同構造，故省略說明 〇 其中，依燈的情形，亦有在保持用筒體4與集電板5 之間未配置金屬箔M2的情形。 ' 接著，針對金屬體Μ的功能詳加說明。 第2圖係僅取出玻璃構件與金屬體與集電板與內部引 線棒所顯示的放大剖面圖。 如第2圖所示，在玻璃構件7與集電板5之間配置有 金屬體Μ，該金屬體Μ係與集電板5的外徑、玻璃構件7 之集電板5側之端面直徑爲大致相同的外徑l〇mm，在中 心形成有比內部引線棒之後端側之基端的外徑更大的內徑 5mm的貫穿孔P，厚度0.05mm的鉬製的1枚金屬箔。 此外，如第2圖所示，難以使集電板5的端面5 a與 內部引線棒3的基端3a相一致，內部引線棒3的基端3a 比集電板5的端面5a稍微突出，若將比集電板5的端面 Φ 5a突出的內部引線棒3的基端3a的突出長度設爲LI，L1 爲 0 · 0 3 3 mm。 . 此外，若將設在金屬體Μ之空隙K之內部引線棒3 的基端3a所突出的方向的長度設爲L2’ L2爲0.05mm。 該L2的長度爲1枚金屬箔的厚度。 亦即，若將比電板5的端面5a更爲突出之內部引線 棒3之基端3a的突出長度設爲L1，將設在金屬體Μ之空 隙Κ之內部引線棒3的基端3a所突出的方向的長度設爲 L2，則滿足LI < L2的關係。 -13- 201013739 結果，由密封管12的外部使用燃燒器等作加熱處理 ，而將玻璃構件7與密封管12熔接時，將金屬體Μ配置 在玻璃構件7與集電板5之間，藉此利用該金屬體Μ使 玻璃構件7與集電板5完全隔離而阻止接觸，而且，即使 內部引線棒3的基端3a比集電板5的端面5a更爲突出， 所突出部分的基端3a亦不會抵接於玻璃構件7，因此可 防止在玻璃構件7發生裂痕，最後可防止發光管的氣體漏 洩，防止密封管破損，而可獲得長使用壽命。 其中，以金屬體Μ、集電板5、玻璃構件7的組合而 言，即使爲例如金屬體Μ、集電板5的外徑、與玻璃構件 7之集電板5側之端面的直徑大致相同爲15mm，金屬體 Μ的貫穿孔的內徑爲6mm的組合，亦獲得相同的效果。 此外，即使爲例如金屬體Μ、集電板5的外徑、與玻璃構 件7之集電板5側之端面的直徑大致相同爲30mm，金屬 體Μ的貫穿孔的內徑爲6mm的組合，亦獲得相同的效果 〇 第3圖係本發明之放電燈之其他實施例之僅取出玻璃 構件與金屬體與集電板與內部引線棒所顯示的放大剖面圖 ，第4圖係僅取出構成第3圖所示之金屬體之金屬箔的斜 視圖。201013739 VI. Description of the Invention: [Technical Field] The present invention relates to a discharge lamp, and more particularly to a discharge lamp having a hermetic sealing structure which is particularly suitable for use in a large current. [Prior Art] In general, discharge lamps (e.g., mercury lamps) have been widely used in the field of utilizing ultraviolet rays emitted by lamps φ, for example, in the field of photochemical industry, in the manufacture of semiconductor devices, and other fields. In a high-pressure mercury lamp or an ultra-high-pressure mercury lamp for high-current use, the amount of mercury enclosed as a main component of the luminescent gas is large, and the gas pressure in the arc tube at the time of lighting is very high, and the amount of heat generation is large, and therefore, especially in the hermetic sealing portion. In the glass, heat resistance and pressure resistance must be large. Moreover, in the lighting, the mercury in the luminous tube must be completely evaporated, so that in the luminous tube in the lighting, there must be no lower temperature portion such as mercury condensation. φ Thus, in the conventional high-pressure mercury lamp or ultra-high pressure mercury lamp, the so-called rod seal (the seal seal for sealing the gas tight seal of the sealed tube) is not used by directly welding the glass forming the sealing tube to the lead rod for power supply. The structure is a so-called foil sealing structure using a metal foil for sealing. Fig. 7 is an explanatory view showing an example of a high pressure mercury lamp having a foil sealing structure. 1 is a discharge vessel composed of an arc tube 11 and a sealing tube 12 connected thereto. An electrode 2 is disposed in the arc tube 11 of the discharge vessel 1, and the electrode 2 is supported by an inner lead bar 3. The inner lead bar 3 is held by the glass holding cylinder 4 holding the inner lead bar 3 201013739 in the sealed tube 12. Then, the rear end side of the inner lead bar 3 opposite to the electrode 2 is inserted into a through hole of the current collector plate 5 made of a high melting point metal such as molybdenum, and is welded to the current collector plate 5 in the set. A metal foil 6 for power supply is welded to the surface of the U-shaped side of the arc tube of the electric board 5. The metal foil 6 for power supply is disposed on the outer circumference of the cylindrical glass member 7, and is spaced apart from each other in the circumferential direction, and five, for example, five strips are arranged in the axial direction of the glass member 7. Then, the power supply metal foil 6 is welded to the disk-shaped metal member 8 at the other end opposite to the direction in which the current collector plate 5 is welded, and is electrically connected to the external lead bar 9 through the metal member 8. . The outer lead bar 9 is held by the glass holding cylinder 41 holding the outer lead bar 9, is welded to the metal member 8 through the metal member 8, and is inserted into the hole 7 1 formed in the glass member 7. Then, a metal foil M1 made of molybdenum is disposed between the glass member 7 and the current collector 5, and a metal foil M2 made of molybdenum is disposed between the holding cylinder 4 for holding the inner lead bar 3 and the current collector 5. As shown in Fig. 8(a), the metal foil M1 is a disk-shaped metal foil having no through hole, and its diameter is substantially the same as the diameter of the current collector plate 5. As shown in Fig. 8(b), the metal foil M2 is an annular metal foil having a through hole through which the inner lead 3 is formed at the center, and has a diameter substantially equal to the diameter of the current collector plate 5. However, since the other sealed tube portion has the same structure, the explanation is omitted. In the arc tube 11 of the discharge vessel 1 configured as described above, the electrode 2 is placed therein in the range of -6 - 201013739. . Then, the discharge vessel 1 is rotated in the circumferential direction by a glass disk or the like, and is heat-treated by a burner or the like from the outside of the sealing tube 12, and the inner circumference of the sealing tube 12 and the outer periphery of the glass member 7 are supplied with electricity. The metal foil 6 is used for hermetic welding. Further, the glass of the sealing tube 12 at a portion facing the holding cylinder 4 is also subjected to heat treatment. The inner circumference of the sealing tube 12 is welded to the holding cylinder 4. However, the other sealed pipe portion has the same structure, and therefore the description is omitted. In the heat treatment process of the sealing pipe 12, if the glass member 7 is in contact with the current collector plate 5, the expansion coefficient of the respective members may be different. When the glass member 7 is slightly cracked, the metal case Μ 1 is disposed between the glass member 7 and the current collector 5 so that the glass member 7 and the current collector 5 do not contact each other. In the same manner, in the heat treatment process of the sealing tube 12, if the holding cylinder 4 for holding the inner lead 3 is in contact with the current collector 5, the holding cylinder 4 may be present due to the difference in expansion coefficient of the respective members. In the case where fine cracks occur, the metal foil M2 is disposed between the holding cylinder 4 and the current collector 5 so that the holding cylinder 4 and the current collector 5 are not in contact with each other. Among them, depending on the lamp, there is also a lamp having a structure in which the metal foil M2 is not disposed between the holding cylinder 4 and the current collector 5. However, even in the case where the metal case M1 is disposed between the glass member 7 and the current collector 5, the heat treatment is performed on the outside of the sealed tube 12 using a burner or the like for 201013739, depending on the case, it is in the glass. The portion of the member 7 that is in contact with the metal foil M1 is cracked, and the crack grows in the lighting, and finally, the gas in the arc tube 11 leaks or the sealing tube 12 is broken. As shown in FIG. 9, the rear end side of the inner lead bar 3 opposite to the electrode 2 is inserted into the through hole of the current collector plate 5 to be welded to the current collector plate 5, but it is difficult to make the inner lead wire. The base end 3a on the rear end side of the rod 3 coincides with the end surface 5a of the current collector plate 5, and the base end 3a of the inner lead bar 3 is protruded more than the end surface 5a of the current collector plate 5 to be welded. In the case of the configuration as shown above, in the process of heat treatment using a burner or the like from the outside of the sealing tube 12, the base end 3a of the protruding inner lead bar 3 presses the metal foil Μ on the side of the glass member 7 And the glass member 7 of the pressed portion is cracked. (Patent Document 1) JP-A-2000-149873 SUMMARY OF INVENTION Technical Problem The present invention has been made in view of the above circumstances, and an object thereof is to provide a glass which is prevented from being disposed in a sealed tube. The member is cracked, and at the end, the gas of the arc tube is prevented from leaking, and the sealed tube is prevented from being damaged, and a discharge lamp having a long service life can be obtained. (Means for Solving the Problem) The discharge lamp of the first application of the patent scope is composed of a discharge vessel in which a sealed tube is connected at both ends of a light pipe of -8-201013739; and a columnar shape disposed inside the sealed pipe a glass member; a metal current collector plate disposed inside the sealed tube and facing the end surface of the glass member on the light-emitting tube side; the front end extending toward the light-emitting tube, and an electrode at the front end thereof opposite to the electrode The rear end side is inserted into the inner lead bar of the current collector plate through a through hole formed in the center of the current collector plate; and is disposed to be disposed on the outer circumference of the inner lead bar and the inner circumference of the sealing tube a φ glass holding cylinder for the inner lead bar; and a metal foil for power supply extending along the outer circumference of the glass member, the one end portion is connected to the current collector plate, and the other end portion is electrically connected to the outer lead bar The base end of the rear end side of the inner lead bar is more protruded than the end surface of the current collector plate, and a metal body is disposed between the glass member and the current collector plate. The genus system has a space for inserting the base end of the inner lead bar, and if the protruding length of the base end of the inner lead bar that protrudes more than the end surface of the current collector plate is L1, it is provided in the space of the metal body. When the length of the direction in which the base end of the inner lead bar protrudes is L2, it is L1CL2. The discharge lamp of claim 2 is the discharge lamp of claim 1, wherein the metal system is laminated with a plurality of annular metal foils having through holes formed in the center, and the through holes of the respective metal foils overlap. A communication hole is formed, and the communication hole is formed as a discharge lamp provided in the gap of the metal body, the discharge lamp of the third application of the patent application scope of claim 3, in particular, the flat portion and the flat portion of the metal system a metal foil formed by a curved portion bent in the direction of the current collector plate. The surface of the inner lead bar side in the flat portion of the metal foil and the inner edge of the curved portion of the metal foil The concave portion is formed, and the concave portion is formed in a space provided in the metal body. (Effect of the Invention) - The discharge lamp of the present invention according to the first aspect of the patent application is characterized in that the rear end side of the inner lead bar is welded to the through hole of the current collector plate, and the current collector plate and the inside of the sealing tube are disposed inside the current collecting plate Since the metal body is disposed between the columnar glass members, the glass member can be isolated from the current collector plate without being in contact with each other. In addition, the metal system has a gap for inserting the base end of the end side of the inner lead bar, and the base end of the inner lead bar is more prominent than the end face of the collector plate, if the inner lead bar is protruded more than the end face of the collector plate The protruding length of the base end is L1, and when the length in the direction in which the base end of the inner lead bar provided in the gap of the metal body protrudes is L2, it is L1 < L2, so the burner is used outside the sealed tube. When the heat treatment is performed, even if the base end of the end side after the inner lead bar is formed to protrude from the end surface of the current collector plate, the base end of the inner lead bar is not in contact with the glass member. There is no case where the base end of the inner lead bar presses the glass member, so that cracking of the glass member can be prevented, and finally, gas leakage of the light-emitting tube can be prevented, and the sealed tube can be prevented from being damaged, and a long service life can be obtained. According to the second aspect of the present invention, in the discharge lamp of the present invention, the metal system is laminated with a plurality of annular metal foils having through holes formed in the center, and the through holes of the respective metal foils are heavy. And a communication hole is formed, and the communication hole -10-201013739 is formed so that the space provided in the metal body is inserted into the base end of the inner lead rod which is protruded more than the end surface of the collector plate, so that it can be simple The configuration can also reliably prevent the glass member from abutting the base end of the inner lead bar. Further, according to the discharge lamp of the invention of the third aspect of the invention, the metal system is a metal foil composed of a flat portion and a curved portion bent in a direction of the current collector plate around the flat portion, by the metal foil a recessed portion is formed in a surface of the flat portion on the inner lead bar side and an inner edge of the bent portion of the metal foil, and the recess is formed in a gap provided in the metal body, and the gap is inserted into the end surface of the current collector plate In order to highlight the base end of the aforementioned inner lead bar, it is possible to have a simple configuration while reliably preventing the glass member from abutting against the base end of the inner lead bar. [Embodiment] A discharge lamp of the present invention will be described using a schematic diagram. Figure 1 is a cross-sectional view of a discharge lamp of the present invention. • 1 is a discharge capacitor consisting of an arc tube 11 and a sealed tube 12 connected thereto. The electrode 2 is disposed in the arc tube 11 of the discharge vessel 1, and the electrode 2 is provided at the tip end of the inner lead bar 3 extending toward the inside of the arc tube 11 at the tip end. The inner lead bar 3 is inserted into the sealing tube 12 by being inserted through the perforation of the glass holding cylinder 4 disposed between the outer periphery of the inner lead bar 3 and the inner circumference of the sealing tube 12. The rear end side of the inner lead bar 3 opposite to the electrode 2 is inserted through a through hole -11 - 201013739 formed in the center of the collector plate 5 made of a high melting point metal such as molybdenum, and is fixed by welding. Collector board 5. A cylindrical glass member 7 is disposed inside the sealed tube 11. The current collector plate 5 is disposed inside the sealed tube 12 and faces the end faces of the glass member 7 on the side of the light-emitting tube 1 1 . The surface of the glass member 7 facing the current collector plate 5 is planar. The surface of the current collector plate 5 on the side of the arc tube 11 is welded to one end side of the power supply metal case 6, and the power supply metal case 6 extends in the axial direction along the outer circumference of the cylindrical glass member 7, for example, in the glass. The circumferential direction of the member 7 is spaced apart and five are arranged in a strip shape, and the other side of the power supply metal foil 6 opposite to the direction in which the current collector plate 5 is welded is welded to the disk-shaped metal member 8, Further, the metal member 8 is electrically connected to the outer lead bar 9, and one end side of the power supply metal foil 6 may be welded to the side surface of the current collector plate 5. The outer lead bar 9 is held by the glass holding cylinder 41 holding the outer lead bar 9, and is welded to the metal member 8 through the metal member 8 to be inserted into the hole 71 formed in the glass member 7. Then, a metal body 配置 is disposed between the glass member 7 and the current collector 5, and a metal foil M2 made of molybdenum is disposed between the holding cylinder 4 holding the inner lead bar 3 and the current collector 5. The metal body tether is described in detail in the later paragraph. As shown in Fig. 8(b), the metal foil m2 has an annular metal foil having a through hole through which the inner lead bar 3 is inserted at the center, and the diameter thereof is substantially the same as the diameter of the current collector 5. -12- 201013739 However, the other sealed pipe portion has the same structure, and therefore the description thereof is omitted. In the case of the lamp, the metal foil M2 is not disposed between the holding cylinder 4 and the current collector plate 5. . ' Next, the function of the metal body is explained in detail. Fig. 2 is an enlarged cross-sectional view showing only the glass member and the metal body, and the current collector plate and the inner lead bar are taken out. As shown in Fig. 2, a metal body Μ is disposed between the glass member 7 and the current collector 5, and the outer diameter of the metal body and the current collector plate 5 and the diameter of the end face of the glass member 7 on the collector plate 5 side are arranged. A substantially uniform outer diameter l〇mm was formed in the center with a through hole P having an inner diameter of 5 mm larger than the outer diameter of the base end on the rear end side of the inner lead bar, and a metal foil made of molybdenum having a thickness of 0.05 mm. Further, as shown in Fig. 2, it is difficult to make the end face 5a of the current collector plate 5 coincide with the base end 3a of the inner lead bar 3, and the base end 3a of the inner lead bar 3 slightly protrudes from the end face 5a of the collector plate 5, When the protruding length of the base end 3a of the inner lead bar 3 protruding from the end surface Φ 5a of the collector plate 5 is LI, L1 is 0 · 0 3 3 mm. Further, the length in the direction in which the base end 3a of the inner lead bar 3 provided in the gap K of the metal body is protruded is L2' L2 is 0.05 mm. The length of the L2 is the thickness of one metal foil. That is, if the protruding length of the base end 3a of the inner lead bar 3 which protrudes more than the end surface 5a of the electric plate 5 is L1, the base end 3a of the inner lead bar 3 provided in the gap of the metal body is provided. When the length of the protruding direction is set to L2, the relationship of LI < L2 is satisfied. -13- 201013739 As a result, when the glass member 7 and the sealing tube 12 are welded by the outside of the sealing tube 12, the metal body Μ is disposed between the glass member 7 and the current collecting plate 5, This uses the metal body to completely isolate the glass member 7 from the collector plate 5 from contact, and even if the base end 3a of the inner lead bar 3 protrudes more than the end face 5a of the collector plate 5, the base end of the protruding portion 3a does not abut against the glass member 7, so that cracking of the glass member 7 can be prevented, and finally, gas leakage of the arc tube can be prevented, and the sealing tube can be prevented from being damaged, and a long service life can be obtained. In addition, the combination of the metal body Μ, the current collector plate 5, and the glass member 7 is, for example, a metal body Μ, an outer diameter of the current collector plate 5, and a diameter of an end surface of the glass member 7 on the current collector plate 5 side. The same effect was obtained also in the combination of the inner diameter of the through hole of the metal body of 15 mm and the same as 15 mm. Further, for example, the outer diameter of the metal body Μ, the current collector plate 5, and the end surface of the glass member 7 on the current collector plate 5 side are substantially the same as 30 mm, and the inner diameter of the through hole of the metal body 为 is 6 mm. The same effect is obtained. FIG. 3 is an enlarged cross-sectional view showing only the glass member and the metal body and the current collector plate and the inner lead bar shown in another embodiment of the discharge lamp of the present invention, and FIG. 4 is only taken out. 3 is a perspective view of the metal foil of the metal body shown in FIG.
如第3圖所示，在玻璃構件7與集電板5之間配置有 金屬體Μ，該金屬體Μ係在中心具有供比集電板5的端 面5a更爲突出的內部引線棒3的基端3a揷入的空隙Κ。 金屬體Μ係將如第4圖所示在中心形成有貫穿孔P -14 - 201013739 的環狀金屬箔Ma層積3枚的構造。 集電板5係鉬製金屬板，厚度2mm、外徑10mm且在 中心形成有供內部引線3相通的內徑5mm的貫穿孔。 如第4圖所示，金屬箔Ma係與集電板5的外徑、與 玻璃構件7之集電板5側之端面的直徑爲大致相同的外徑 10mm且在中心形成有內徑 5mm的貫穿孔 P，厚度 0.015mm的組製金屬箔。 φ 如第3圖所示，金屬體Μ係3枚金屬箔Ma的貫穿孔 P相重疊而形成爲連通孔，該連通孔形成爲被設在金屬體 Μ的空隙K。 此外，如第3圖所示，難以使集電板5的端面5a與 內部引線棒3的基端3a相一致，內部引線棒3的基端3a 比集電板5的端面5a稍微突出，若將比集電板5的端面 5a更爲突出的內部引線棒3的基端3a的突出長度設爲L1 ，L1 爲 0.033mm 〇 • 此外，若將被設在金屬體Μ之空隙K之內部引線棒 3的基端3a所突出的方向的長度設爲L2，L2爲0.045mm 〇 在第3圖中，爲了說明起見，係描繪成在各自之金屬 箔Ma之間形成有空隙，但是實際上並沒有空隙，金屬箔 Ma係相密接，該L2的長度係與3枚金屬箔Ma的合計厚 度相等。 亦即，若將由集電板5的端面5a更爲突出之內部引 線棒3之基端3a的突出長度設爲L1，將設在金屬體Μ之 -15- 201013739 空隙K之內部引線棒3的基端3a所突出的方向的長度設 爲L2，則滿足LI < L2的關係。 結果，由密封管12的外部使用燃燒器等作加熱處理 ，而將玻璃構件7與密封管12熔接時，將金屬體Μ配置 在玻璃構件7與集電板5之間，藉此利用該金屬體Μ使 玻璃構件7與集電板5完全隔離而阻止接觸，而且，即使 內部引線棒3的基端3a比集電板5的端面5a更爲突出， 所突出部分的基端3a的基端面3a亦不會抵接於玻璃構件 @ 7，因此可防止在玻璃構件7發生裂痕，最後可防止發光 管的氣體漏洩，防止密封管破損，而可獲得長使用壽命。 其中，在上述實施例中，金屬體Μ係將具有貫穿孔P 的金屬箔Ma層積3枚的構造，但是亦可按照比集電板5 的端面5a更爲突出的內部引線棒3的基端3a的長度，適 當變更金屬箔Ma的層積枚數。 第5圖係僅取出使用其他實施形態之金屬體時之玻璃 構件與金屬體與集電板與內部引線棒所顯示的放大剖面圖 @ 〇 在第5圖中，相較於比集電板5的端面5a更爲突出 之內部引線棒3之基端3a的長度L1，被設在金屬體Μ之 空隙Κ之內部引線棒3的基端3a所突出的方向的長度L2 爲較長的構造，將第8圖（a)所示之不具貫穿孔的圓盤 狀金屬箔Ml配置在予以層積複數之金屬箔Ma中最爲靠 近集電板5的金屬箔Ma的集電板5側。 在如上所示之放電燈中，在將密封管作加熱處理時， -16- 201013739 該不具貫穿孔的金屬箔Ml係藉由內部引線棒3的基端3a ，以進入至空隙K內的方式變形。 但是’由於L1CL2，因此即使該不具貫穿孔的金屬 箔Ml變形’亦形成爲內部引線棒3的基端3a與玻璃構 •件7不會確實地接觸的構造，可防止在玻璃構件7發生裂 痕。 其中，雖未圖示，但即使將如第8圖（a)所示之不 具貫穿孔的圓盤狀金屬箔Ml配置在第3圖所示之金屬箔 Ma之間’在對密封管作加熱處理時，該不具貫穿孔的金 屬箔Ml會藉由內部引線棒3的基端3a，以進入至空隙K 內的方式發生變形，但是金屬體Ma的合計厚度（此時， 若金屬體Ma全部密接，則會變得與設在金屬體Ma之空 隙K之內部引線棒3的基端3a所突出的方向的長度L2 爲相同）L2會大於比集電板5的端面5a更爲突出之內部 引線棒3之基端3a的長度L1，因此會形成爲內部引線棒 • 3的基端3a與玻璃構件7不會確實接觸的構造，可防止 在玻璃構件7發生裂痕。 第6圖係本發明之放電燈之其他實施例之僅取出玻璃 構件與金屬體與集電板與內部引線棒所顯示的放大剖面圖 〇 如第6圖所示，在玻璃構件7與集電板5之間配置有 金屬體Μ，該金屬體係將1枚金屬箔Mb的周邊進行彎曲 加工後的構造。 集電板5係鉬製的金屬板，厚度2mm、外徑1 0mm且 -17- 201013739 在中心形成有供內部引線棒3相通的內徑5mm的貫穿孔 玻璃構件7之集電板5側之端面的直徑爲10mm。As shown in Fig. 3, a metal body Μ is disposed between the glass member 7 and the current collector 5, and the metal body has an inner lead bar 3 which is protruded from the end surface 5a of the current collector plate 5 at the center. The gap at the base end 3a is Κ. The metal body is a structure in which three annular metal foils Ma having through holes P -14 - 201013739 are formed in the center as shown in Fig. 4 . The collector plate 5 is a molybdenum metal plate having a thickness of 2 mm and an outer diameter of 10 mm, and a through hole having an inner diameter of 5 mm through which the inner lead 3 communicates is formed at the center. As shown in Fig. 4, the outer diameter of the metal foil Ma and the current collector plate 5 and the diameter of the end surface of the glass member 7 on the collector plate 5 side are substantially the same as the outer diameter of 10 mm and the inner diameter of the inner diameter of 5 mm is formed. The through hole P is a metal foil of a thickness of 0.015 mm. φ As shown in Fig. 3, the through holes P of the metal foils of the three metal foils Ma are superposed to form a communication hole, and the communication holes are formed as the gaps K provided in the metal body. Further, as shown in Fig. 3, it is difficult to make the end surface 5a of the current collector plate 5 coincide with the base end 3a of the inner lead bar 3, and the base end 3a of the inner lead bar 3 slightly protrudes from the end surface 5a of the current collector plate 5, if The protruding length of the base end 3a of the inner lead bar 3 which protrudes more than the end surface 5a of the collector plate 5 is L1, and L1 is 0.033 mm. 此外 In addition, if the inner lead of the space K is to be provided in the metal body, The length of the direction in which the base end 3a of the rod 3 protrudes is set to L2, and L2 is 0.045 mm. In Fig. 3, for the sake of explanation, a gap is formed between the respective metal foils Ma, but actually There is no void, and the metal foil Ma is in close contact with each other, and the length of the L2 is equal to the total thickness of the three metal foils Ma. That is, if the protruding length of the base end 3a of the inner lead bar 3 which is more protruded from the end surface 5a of the current collector plate 5 is L1, the inner lead bar 3 of the gap KK of the metal body -15-201013739 is provided. When the length of the direction in which the base end 3a protrudes is L2, the relationship of LI < L2 is satisfied. As a result, when the glass member 7 and the sealing tube 12 are welded by the outside of the sealing tube 12, the metal body Μ is disposed between the glass member 7 and the current collector 5, whereby the metal is utilized. The body member completely isolates the glass member 7 from the current collector plate 5 to prevent contact, and even if the base end 3a of the inner lead bar 3 protrudes more than the end face 5a of the collector plate 5, the base end face of the base end 3a of the projecting portion 3a also does not abut against the glass member @7, so that cracking of the glass member 7 can be prevented, and finally, gas leakage of the light-emitting tube can be prevented, and the sealed tube can be prevented from being damaged, and a long service life can be obtained. In the above embodiment, the metal body is formed by laminating three metal foils Ma having the through holes P, but may be based on the base of the inner lead bars 3 which protrudes more than the end faces 5a of the collector plates 5. The length of the end 3a is appropriately changed by the number of layers of the metal foil Ma. Fig. 5 is an enlarged cross-sectional view showing only the glass member and the metal body and the current collector plate and the inner lead bar when the metal body of the other embodiment is taken out. 〇 In Fig. 5, compared with the collector plate 5 The length L1 of the base end 3a of the inner lead bar 3 which is more prominent in the end face 5a is a structure in which the length L2 in the direction in which the base end 3a of the inner lead bar 3 protrudes in the gap of the metal body is long. The disk-shaped metal foil M1 having no through-holes as shown in Fig. 8(a) is disposed on the collector plate 5 side of the metal foil Ma which is the closest to the current collector plate 5 among the metal foils Ma which are laminated. In the discharge lamp as described above, when the sealing tube is subjected to heat treatment, the metal foil M1 having no through-holes is passed through the base end 3a of the inner lead rod 3 to enter the gap K in the manner of -16-201013739 Deformation. However, 'the deformation of the metal foil M1 having no through-holes' is formed such that the base end 3a of the inner lead bar 3 does not reliably contact the glass member 7 due to the L1CL2, and the crack in the glass member 7 can be prevented. . However, although not shown, even if the disk-shaped metal foil M1 which does not have a through-hole as shown in FIG. 8 (a) is arrange|positioned between the metal foil Ma shown in FIG. 3, the sealing tube is heated. During the treatment, the metal foil M1 having no through-holes is deformed by the base end 3a of the inner lead bar 3 so as to enter the gap K, but the total thickness of the metal body Ma (at this time, if the metal body Ma is all In the case of close contact, the length L2 in the direction in which the base end 3a of the inner lead bar 3 provided in the gap K of the metal body Ma protrudes is the same) L2 is larger than the inner side of the end face 5a of the collector plate 5 The length L1 of the base end 3a of the lead bar 3 is formed so that the base end 3a of the inner lead bar 3 does not reliably contact the glass member 7, and cracking of the glass member 7 can be prevented. Figure 6 is an enlarged cross-sectional view showing only the glass member and the metal body and the current collector plate and the inner lead bar shown in another embodiment of the discharge lamp of the present invention, as shown in Fig. 6, in the glass member 7 and the current collection. A metal body 配置 is disposed between the plates 5, and the metal system has a structure in which the periphery of one metal foil Mb is bent. The collector plate 5 is a metal plate made of molybdenum, and has a thickness of 2 mm, an outer diameter of 10 mm, and -17-201013739. The collector plate 5 side of the through-hole glass member 7 having an inner diameter of 5 mm through which the inner lead bar 3 communicates is formed at the center. The end face has a diameter of 10 mm.
金屬箔Mb係由平坦部Mb 1、及該平坦部Mb 1的周邊 朝集電板的方向彎曲的彎曲部Mb2所構成，藉由平坦部 Mb 1中之內部引線棒3側的表面Mb 10與彎曲部Mb2的內 緣Mb2 0形成凹部K2，在該凹部K2插入有比集電板5的 端面5a更爲突出之內部引線棒3的基端3a。 G 該金屬箔Mb係厚度爲0.10 mm，外徑爲l〇mm，彎曲 部Mb2之內緣Mb20的開口徑爲7mm。 此外，如第6圖所示，若將比集電板5的端面5a更 爲突出之內部引線棒3之基端3a的突出長度設爲LI，L1 爲 0.033mm。 此外，若將被設在金屬體Μ之屬於空隙K之凹部K2 之內部引線棒3的基端3a所突出的方向的長度設爲L2， L2爲0.045mm。若爲該實施例，L2的長度係自平坦部 © Mbl的表面MblO與彎曲部Mb2之內緣Mb20之集電板5 側之前端部之間的長度。 亦即，若將由集電板5的端面5a更爲突出之內部引 線棒3之基端3a的突出長度設爲L1，將設在金屬體Μ之 空隙Κ之內部引線棒3的基端3a所突出的方向的長度設 爲L2 ’則滿足LI < L2的關係。 結果，即使內部引線棒3的基端3a比集電板5的端 面5a更爲突出，該基端3a所突出的部分係被插入至金屬 -18- 201013739 箔Mb的凹部K2，形成爲內部引線棒3的基端3a並不會 抵接玻璃構件7的狀態。 結果，由密封管12的外部使用燃燒器等作加熱處理 ，而將玻璃構件7與密封管12熔接時’將金屬體Μ配置 在玻璃構件7與集電板5之間，藉此利用該金屬體Μ使 玻璃構件7與集電板5完全隔離而阻止接觸，而且，即使 內部引線棒3的基端3a比集電板5的端面5a更爲突出， 所突出部分的基端3a的基端面3a亦不會抵接於玻璃構件 7，因此可防止在玻璃構件7發生裂痕，最後可防止發光 管的氣體漏洩，防止密封管破損，而可獲得長使用壽命。 【圖式簡單說明】 第1圖係本發明之放電燈的說明圖。 第2圖係僅取出本發明之放電燈之玻璃構件與金屬體 與集電板與內部引線棒所顯示的放大剖面圖。 第3圖係僅取出本發明之放電燈之玻璃構件與金屬體 與集電板與內部引線棒所顯示的放大剖面圖。 第4圖係僅取出構成第3圖所示之金屬體之金屬箔的 斜視圖。 第5圖係僅取出本發明之放電燈之玻璃構件與金屬體 與集電板與內部引線棒所顯示的放大剖面圖。 第6圖係本發明之放電燈之其他實施例之僅取出玻璃 構件與金屬體與集電板與內部引線棒所顯示的放大剖面圖 -19- 201013739 第7圖係習知放電燈的說明圖。 第8圖係僅取出第7圖所示之放電燈之金屬箔的斜視 圖。 第9圖係顯示集電板與內部引線之固定構造的說明圖 【主要元件符號說明】 1 :放電容器 @ 2 :電極 3 :內部引線棒 3a:內部引線棒3的基端 4 :保持用筒體 5 :集電板 5a :集電板5的端面 6 :供電用金屬箔 7 :玻璃構件 ❹ 8 :金屬構件 9 :外部引線棒 1 1 :發光管 I 2 :密封管 4 1 :保持用筒體 71 :孔 K :空隙 K2 :凹部 -20- 201013739The metal foil Mb is composed of a flat portion Mb 1 and a curved portion Mb2 bent in the direction of the current collector plate around the flat portion Mb 1 , and the surface Mb 10 on the inner lead bar 3 side in the flat portion Mb 1 is The inner edge Mb20 of the curved portion Mb2 forms a concave portion K2 into which the proximal end 3a of the inner lead rod 3 which protrudes more than the end surface 5a of the current collector plate 5 is inserted. G The metal foil Mb has a thickness of 0.10 mm, an outer diameter of 10 mm, and an inner diameter Mb20 of the curved portion Mb2 has an opening diameter of 7 mm. Further, as shown in Fig. 6, the protruding length of the base end 3a of the inner lead bar 3 which protrudes more than the end surface 5a of the current collector plate 5 is LI, and L1 is 0.033 mm. Further, the length in the direction in which the base end 3a of the inner lead bar 3 which is provided in the concave portion K2 of the gap K of the metal body is protruded is L2, and L2 is 0.045 mm. In the embodiment, the length of L2 is the length from the surface Mb1 of the flat portion © Mbl and the front end portion of the inner edge Mb20 of the curved portion Mb2 on the collector plate 5 side. That is, when the protruding length of the base end 3a of the inner lead bar 3 which is further protruded from the end surface 5a of the current collector 5 is L1, the base end 3a of the inner lead bar 3 provided in the gap of the metal body is provided. The length of the protruding direction is set to L2 ', which satisfies the relationship of LI < L2. As a result, even if the base end 3a of the inner lead bar 3 protrudes more than the end face 5a of the collector plate 5, the portion protruding from the base end 3a is inserted into the recess K2 of the metal -18-201013739 foil Mb, forming an inner lead The base end 3a of the rod 3 does not abut the state of the glass member 7. As a result, a heat treatment is performed from the outside of the sealing tube 12 by using a burner or the like, and when the glass member 7 and the sealing tube 12 are welded, the metal body is disposed between the glass member 7 and the current collector 5, whereby the metal is utilized. The body member completely isolates the glass member 7 from the current collector plate 5 to prevent contact, and even if the base end 3a of the inner lead bar 3 protrudes more than the end face 5a of the collector plate 5, the base end face of the base end 3a of the projecting portion 3a does not abut against the glass member 7, so that cracking of the glass member 7 can be prevented, and finally, gas leakage of the arc tube can be prevented, and the sealing tube can be prevented from being damaged, and a long service life can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an explanatory view of a discharge lamp of the present invention. Fig. 2 is an enlarged cross-sectional view showing only the glass member and the metal body of the discharge lamp of the present invention, and the current collector plate and the inner lead bar. Fig. 3 is an enlarged cross-sectional view showing only the glass member and the metal body of the discharge lamp of the present invention and the current collector plate and the inner lead bar. Fig. 4 is a perspective view showing only the metal foil constituting the metal body shown in Fig. 3 taken out. Fig. 5 is an enlarged cross-sectional view showing only the glass member and the metal body of the discharge lamp of the present invention and the current collector plate and the inner lead bar. Figure 6 is an enlarged cross-sectional view showing only the glass member and the metal body and the current collector plate and the inner lead bar of another embodiment of the discharge lamp of the present invention. Figure 19 - 201013739 Fig. 7 is an explanatory view of a conventional discharge lamp . Fig. 8 is a perspective view showing only the metal foil of the discharge lamp shown in Fig. 7 taken out. Fig. 9 is an explanatory view showing a fixing structure of the current collector plate and the inner lead wire [Description of main component symbols] 1 : discharge vessel @ 2 : electrode 3 : inner lead bar 3a: base end 4 of inner lead bar 3 : holding cylinder Body 5: Current collector plate 5a: End face 6 of current collector plate 5: Metal foil for power supply 7: Glass member ❹ 8: Metal member 9: External lead bar 1 1 : Light-emitting tube I 2 : Sealing tube 4 1 : Holding cylinder Body 71: Hole K: Clearance K2: Concave -20- 201013739
Ll :長度 L2 :長度 Μ :金屬儀 Ml :金屬 M2 :金屬 Ma :金屬‘ M b 1 :平坦 ❿ Mb2 :彎_ Mbl 0 :平 Mb20 :彎 P :貫穿孔 箱 箱 箱 [部 丨部 坦部Mb 1中之內部引線棒3側的表面 曲部Mb2的內緣Ll : length L2 : length Μ : metal meter Ml : metal M2 : metal Ma : metal ' M b 1 : flat ❿ Mb2 : bend _ Mbl 0 : flat Mb20 : bend P : through hole box box The inner edge of the surface curved portion Mb2 on the side of the inner lead bar 3 in Mb 1
-21 --twenty one -