200941537 38〜内側封合管； 80A〜蓋子。 五、^案若有化學式時，請揭示最能顯示發明特徵的化學式 六、發明說明： φ 【發明所屬之技術領域】 、本發明係有關於-種短弧型放電燈等放電燈的封合 &，特別是有關於一種封合管重疊的封合構造。 【先前技術】 在短狐型放電燈中，在封入電極的發光管的兩端 地設置玻璃製的封合管，在封合管内，支持電極的電極支 持棒由圓筒狀的玻璃管保持。利用金屬荡的密封構造中， ©經由軸接於電極支持棒的金屬環等使錮笛等 電性連接。然後，在封合工程中，藉由加熱封合管== 其直徑，使封合管與玻璃管溶接。藉此，金屬落被封著， 發光管内成為氣密狀態。 在半導體、液晶製造的領域中，為了提高生產效率， 短弧型放電燈朝大電力化發展。電力增加會使過度的應力 施加於封合管上，恐怕會產生封合管的破損或燈的破壞。 為了防止如此的破壞，由雙重封合構造而提高強度的放電 燈是已知的（參照專利文獻1、2)。 3 2258-l〇263-PF;Chentf 200941537 人姑心封合構造的放電燈巾，將插人於封合管内的包 3玻璃管、金^等的部件（安裝構件冰接於封合管，而 且從其=側㈣接封合管。在專利文獻2巾，為了不使内 側封口 g的端部露出於放電空間，將内側封合管抵接於比 内側封合管的直徑還大的錐拔狀的玻璃管端部。藉由此構 造丄提供-種封合構造，使内侧、外㈣合管同時溶接， k南生產效率。200941537 38 ~ inside sealing tube; 80A ~ cover. 5. If there is a chemical formula, please disclose the chemical formula that best shows the characteristics of the invention. 6. Description of the invention: φ [Technical field to which the invention pertains] The present invention relates to the sealing of discharge lamps such as short-arc discharge lamps. & In particular, there is a sealing structure in which a sealing tube overlaps. [Prior Art] In the short fox type discharge lamp, a glass sealing tube is provided at both ends of the arc tube in which the electrode is sealed, and in the sealing tube, the electrode supporting rod of the supporting electrode is held by a cylindrical glass tube. In the metal squeezing structure, © is electrically connected via a metal ring or the like which is connected to the electrode support rod. Then, in the sealing process, the sealing tube is welded to the glass tube by heating the sealing tube == its diameter. Thereby, the metal falling is sealed, and the inside of the arc tube is in an airtight state. In the field of semiconductor and liquid crystal manufacturing, in order to improve production efficiency, short arc type discharge lamps are developing toward large electric power. An increase in power can cause excessive stress to be applied to the sealing tube, which may result in breakage of the sealing tube or destruction of the lamp. In order to prevent such damage, a discharge lamp which is improved in strength by a double sealing structure is known (see Patent Documents 1 and 2). 3 2258-l〇263-PF; Chentf 200941537 A discharge lamp with a closed structure, which will be inserted into a sealed tube, such as a glass tube, a gold metal, etc. (the mounting member is iced to the sealing tube, Further, the sealing tube is connected from the side (four). In the case of the patent document 2, in order to prevent the end portion of the inner sealing g from being exposed to the discharge space, the inner sealing tube is brought into contact with a cone larger than the diameter of the inner sealing tube. The end of the glass tube is pulled out. By means of the structure, the inner and outer (four) joint tubes are simultaneously melted, and the k-nan production efficiency is obtained.
[專利文獻1]特開2007_157513號公報 [專利文獻2]特開2007-95328號公報 【發明内容】 [發明所欲解決的問題] 在習知的雙重封合構造中，在進行封合工程時，内部 封合管收縮，另一方面直徑大的玻璃管端部由於厚度厚而 其外徑難以變化。因此，内側封合管與玻璃管的在錐拔部 φ 分的接觸面，内側封合管藉由複雜的收縮動作而溶接，在 接觸面恐怕殘留間隙。特別是内侧封合管的端部形狀變得 複雜’容易產生間隙。 在材質不同的金屬環與玻璃管的接觸面附近容易產生 應力集中，容易沿著接觸面附近的微小間隙產生裂縫。產 生的裂縫立即沿著徑向朝鄰接的内側封合管更朝外側封合 管行進。由於此裂縫的行進，封合管斷裂，而且由於裂縫 朝發光管行進而產生燈的破損、破裂。又，如果擴大玻璃 管的發光管側端部的直徑，在外側封合管的熔接部份產生 2258-10263-PF;Chentf 4 200941537 應力集中’可能成為燈點亮時的破裂起點。 另一方面，短弧型放電燈的情況下，希望儘量縮短從 放電開始到上升至穩定點亮狀態的定格燈電壓的時間。作 是’當玻璃管的發光管侧端部的直徑較大時，露出於放電 空間的玻璃管端面的熱容量變大，玻璃管難以變暖。結果， 放電空間内的水銀難以蒸發，達到定格電壓放電需要時 間’無法迅速地進入穩定點亮的狀態。 本發明的放電燈包括：導電性的電極支持棒，支持發 光管内的電極，並配置於與發光管連接的外側封合管内； 玻璃管，保持上述電極支持棒，而與上述外侧封合管^溶接 導電性的環狀構件，面向上述玻璃管，使沿著軸方向配置 的金屬箔與上述電極支持棒做電性連接；以及内側封合 管，在外側封合管内被同轴地熔接。例如，玻璃管為圓^ 狀玻璃管，使電極支持棒軸通於其並保持電極支持棒。^ 狀構件由例如金屬環構成。 Φ 在本發明中，内側封合管從環狀構件延伸至外側封合 管端部的範圍内。即，内側封合管不超過環狀構件轴向: 伸至發光管侧，而從環狀構件與玻璃管的接觸面分離。並 且’玻璃管的環狀構件側端部的直徑比發光管側端部的直 徑大。 由於環狀構件與玻璃管的接觸面從外側封合管及内側 封合管分離’ $易產生於接觸面的裂縫難以傳遞至外側封 合管。又’由於玻璃管的發光管側端部的直徑的大小被抑 制，可迅速地進人敎亮燈的狀態。而且，可抑制玻璃管 2258-10263-PF;Chentf 5 200941537 的發光管側端部的應力集中。 為了避免應力集中，玻璃管的至少一部份被形成為朝 向外側封合管端部側的前端粗的錐拔狀為好。例如 地形成圓筒狀凹部’藉由將環狀構件插人該凹冑，玻璃总 的環狀構件側端部圍繞環狀構件而形成。特別是，為了: 使内側封合管與環狀構件鄰接1比環狀構件的外徑大的 上述玻璃管的環狀構件側端部的軸方向長度設為比上述 狀構件的軸方向厚度大為好。又，為了不使封合管全體大 i内側封合管的直#設為比上述玻璃管的環狀構件側 ，的外牷小為好。例如，在玻璃管朝向封合管端部形成 剛端細的錐拔部分。 ❹ 本發明的放電燈的製造方法包括⑴在前端粗的錐拔 :的:P分與比發光管侧端部的外徑大的環狀構件側端部上 二:設置呈圓筒狀的凹部而形成玻璃管;⑵將保持電 =的導電性的環狀構件插人上述凹部；（3)_比上述導 株佳的環狀構件的外徑大，而外徑比上述麵管的環狀構 ^ = 2㈣小的内侧封合管的發光管侧端部係抵接於 構件侧端部而定位；⑷將包含上述内側封合管 導電性的環狀構件的安裝構件封入外侧 藉由從料對上料㈣合管減，上料_合管及（Γ =内側封合管以及上述玻璃管的發光管側端部同時縮小直 [發明的效果] 根據本發明，提供—眘 托供種確實地使放電空間達到氣密並 2258-l〇263-PF；Chentf 产 η 200941537 無破裂、破損危險的封合構造，同時迅速穩定地實施點燈 【實施方式】 以下參照圖式說明本發明的實施形態。 第1圖為本實施形態的短弧型放電燈的概略剖視圖。 第2圖為陽極侧的封合管的概略剖視圖。 短弧型放電燈10在石英玻璃的發光管12内具有陽極 14、陰極16,在發光管12的兩側同軸地形成封合管μ、 6〇(以下稱外侧封合管）。外側封合管2〇、6〇為與發光管 12體地連接的石英玻璃管，其兩端以燈頭m、80B塞 住。 ❿ 分別在封合管20、60的内部，設有元件(以下稱安裝 構件）18A、18B，支持陽極14、陰極16之同時，密閉並封 合發光管12内的放電空間i卜在本實施形態中，由雙重 封合構造而氣密封合發光f H㈣放電空間u。在放電 空間11 封入水銀及放電氣體。 14^!/圖所示，在封合管20的内部，設有支持陽極 極支持棒22’而延設於外側封合管20内的軸方向。 電極支持棒22插入設於石英玻 管似的轴孔24A，與外側封:二“以下稱電極侧玻璃 24 ^ ^ φ σ s 20熔接的電極側玻璃管 支持棒22。在朝向電極側玻璃管24的發光 s側的端部（發光管侧端部）24T2，i π «in 管㈣接而形成圓筒狀孔24B為了確實地與外側封合 電極支持棒22並非延伸至外側封合管20的端部，， 2258-l〇263-PF；Chentf Ί 200941537 的導線棒28與電極支持棒22以既定間隔同轴地相 向配置。電極支持棒 柱狀玻璃構件34的P 插入沿著石英製的圓 ^的軸設置的插入孔34A、34B，玻 璃構件34保持電極支持 接於與外部電W去 導線棒28。導線棒28係連 、°P電源（未圖示）連接的導線（未圖示）。 剛性金屬環26、32分別緊貼配置於圓筒狀的玻璃構件 34的兩端，電極支接族 ❹ 。接近發光管12的金屬環了線棒28插入於軸孔、 的金屬環（以下稱為内側金屬環）26盥 =側玻璃管24的一邊的端部2m抵接。另一屬 ^下料側金屬環）32與石英製的外側玻璃管⑶抵 % 26、32分別熔接於電極支持棒22、導線棒^。 在内側金屬環26與外側金屬環32之間，沿著軸方向， =個：狀金屬笛36沿著玻璃構件34的外表面於轴方向 面其兩端係炼接於内侧金屬環⑼與外側金屬環⑽的 :卜周面。金屬環32係使導線棒2δ與金編做 接’金屬環26係使金心36與電極支持棒22做電性 人：英玻璃所構成的内側封合管Μ被熔接於外侧封 的内面而被同軸地配置。内側封合管 狀的玻璃構件34、金屬箱36，藉由與外側封合管 :封實合封合管2°内。而且’金屬，"6與第2圖所示的不 Μ:上與内側封合管38相比非常薄。石英製的固定環 ::入於外側封合…端部’固定沿著内 38的軸方向的位置。 s 第3圖為放大外側封合管2。的玻璃管以附近的剖視 2258-l〇263-PF;Chentf 8 200941537 圖。 在電極側玻璃管24的端部24T1附近，從發光管側朝 金屬環側形成前端粗的錐拔部分24S，外側封合管2〇也沿 著錐拔形狀部分24S而形成錐拔狀。錐拔部分24S為防止 應力集中而形成平滑狀。 藉由該錐拔形狀部分24S，電極側玻璃管24的端部 24T1中的直徑D1比另一邊的端部24T2的直徑^大。然[Patent Document 1] Japanese Laid-Open Patent Publication No. 2007-95328 [Patent Document 2] JP-A-2007-95328 SUMMARY OF INVENTION [Problems to be Solved by the Invention] In the conventional double sealing structure, when performing a sealing process The inner sealing tube contracts, and on the other hand, the outer diameter of the glass tube having a large diameter is difficult to change due to the thick thickness. Therefore, the inner sealing tube and the glass tube have a contact surface at the taper portion φ, and the inner sealing tube is melted by a complicated shrinking operation, and a gap may be left on the contact surface. In particular, the shape of the end portion of the inner sealing tube becomes complicated, and a gap is easily generated. Stress concentration is likely to occur in the vicinity of the contact surface between the metal ring and the glass tube having different materials, and it is easy to cause cracks along the minute gap near the contact surface. The resulting crack immediately travels radially toward the adjacent inner sealing tube toward the outer sealing tube. Due to the travel of the crack, the sealing tube is broken, and the lamp is broken and broken due to the crack traveling toward the arc tube. Further, if the diameter of the end portion of the arc tube on the side of the arc tube is enlarged, 2258-10263-PF is generated in the welded portion of the outer sealing tube; the stress concentration of the Chentf 4 200941537 may become the starting point of the crack when the lamp is lit. On the other hand, in the case of a short arc type discharge lamp, it is desirable to shorten the time of the stop lamp voltage from the start of discharge to the rise to the steady lighting state. When the diameter of the end portion of the light-emitting tube side of the glass tube is large, the heat capacity of the end surface of the glass tube exposed to the discharge space becomes large, and the glass tube is hard to be warmed. As a result, it is difficult for the mercury in the discharge space to evaporate, and it takes a time to reach the rated voltage discharge, and it cannot quickly enter a state of stable lighting. The discharge lamp of the present invention comprises: a conductive electrode support rod supporting an electrode in the arc tube and disposed in an outer sealing tube connected to the arc tube; a glass tube holding the electrode support rod and the outer sealing tube The electrically conductive annular member is placed facing the glass tube so that the metal foil disposed along the axial direction is electrically connected to the electrode support rod, and the inner sealing tube is coaxially welded in the outer sealing tube. For example, the glass tube is a round glass tube that allows the electrode support rod to pass through it and maintain the electrode support rod. The ^ member is composed of, for example, a metal ring. Φ In the present invention, the inner sealing tube extends from the annular member to the end of the outer sealing tube. That is, the inner sealing tube does not extend beyond the axial direction of the annular member: it extends to the side of the light-emitting tube, and is separated from the contact surface of the annular member with the glass tube. Further, the diameter of the end portion of the annular member of the glass tube is larger than the diameter of the end portion of the arc tube. Since the contact surface of the annular member and the glass tube is separated from the outer sealing tube and the inner sealing tube, it is difficult to transmit the crack which is likely to occur at the contact surface to the outer sealing tube. Further, since the diameter of the end portion of the light-emitting tube side of the glass tube is suppressed, it is possible to quickly enter the state of the light. Further, stress concentration of the glass tube 2258-10263-PF; the end portion of the light-emitting tube of the Chentf 5 200941537 can be suppressed. In order to avoid stress concentration, it is preferable that at least a part of the glass tube is formed in a tapered shape which is thick toward the front end on the side of the outer side of the sealing tube. For example, the cylindrical recess is formed. By inserting the annular member into the recess, the end portion of the glass-shaped annular member is formed around the annular member. In particular, the length of the annular member-side end portion of the glass tube which is adjacent to the annular member and the annular member is larger than the outer diameter of the annular member is larger than the axial thickness of the member. As well. In addition, it is preferable that the outer diameter of the inside of the sealing tube is not larger than the outer side of the annular member of the glass tube. For example, a tapered portion having a thin end is formed at the end of the glass tube toward the sealing tube.制造 The method for manufacturing a discharge lamp according to the present invention includes (1) a thick taper at the tip end: a P-part and an end portion on the side of the annular member that is larger than the outer diameter of the end portion of the arc tube: a cylindrical recess is provided And forming a glass tube; (2) inserting an annular member that maintains electrical conductivity into the recess; (3) _ larger than an outer diameter of the annular member that is better than the guide, and an outer diameter that is larger than the annular shape of the surface tube The light-emitting tube side end portion of the small inner sealing tube having a small inner sealing tube is abutted against the member-side end portion to be positioned; (4) the mounting member including the inner annular sealing tube conductive member is sealed to the outside by the material For feeding (4), the pipe is reduced, the material is _ pipe and (Γ = the inner sealing pipe and the side end of the light pipe of the glass tube are simultaneously reduced straight [effect of the invention] According to the present invention, it is provided that the seed is indeed The discharge space is made airtight and 2258-l〇263-PF; Chentf produces η 200941537. The sealing structure is free from rupture and damage, and the lighting is quickly and stably performed. [Embodiment] The following describes the implementation of the present invention with reference to the drawings. Fig. 1 is a schematic view of a short arc type discharge lamp of the embodiment Fig. 2 is a schematic cross-sectional view of the sealing tube on the anode side. The short arc type discharge lamp 10 has an anode 14 and a cathode 16 in the arc tube 12 of the quartz glass, and a sealing tube is coaxially formed on both sides of the arc tube 12. μ, 6〇 (hereinafter referred to as the outer sealing tube). The outer sealing tubes 2〇, 6〇 are quartz glass tubes that are physically connected to the arc tube 12, and the ends thereof are plugged by the caps m and 80B. Inside the pipes 20 and 60, elements (hereinafter referred to as mounting members) 18A and 18B are provided, and while the anode 14 and the cathode 16 are supported, the discharge space in the arc tube 12 is sealed and sealed. In the present embodiment, The double sealing structure is gas-sealed to emit light f H (four) discharge space u. Mercury and discharge gas are sealed in the discharge space 11. As shown in Fig. 14 /, inside the sealing tube 20, a supporting anode support rod 22' is provided. The electrode support rod 22 is inserted into the shaft hole 24A of the quartz glass tube, and is welded to the outer side seal: "hereinafter, the electrode side glass 24 ^ ^ φ σ s 20 is welded. The electrode side glass tube supports the rod 22. On the side of the light emitting side of the glass tube 24 facing the electrode side Portion (light-emitting tube side end portion) 24T2, i π «in tube (four) is connected to form a cylindrical hole 24B. In order to reliably seal the electrode support rod 22 from the outer side, the end portion of the outer sealing tube 20 is not extended, 2258- l 〇 263-PF; the wire rod 28 of the Chentf Ί 200941537 and the electrode support rod 22 are coaxially arranged at a predetermined interval. The P insertion of the electrode support rod columnar glass member 34 is inserted along the axis of the quartz circle The holes 34A and 34B and the glass member 34 are connected to a lead wire (not shown) that is connected to the external electric W to the lead bar 28, and to the lead bar 28 and to a P power source (not shown). The rigid metal rings 26, 32 are placed in close contact with each other at both ends of the cylindrical glass member 34, and the electrodes support the family ❹. The metal ring close to the arc tube 12 is inserted into the shaft hole, and the metal ring (hereinafter referred to as the inner metal ring) 26 盥 = the end portion 2m of one side of the side glass tube 24 abuts. The other genus ^feeding side metal ring 32 and the outer glass tube (3) made of quartz are welded to the electrode support rod 22 and the wire rod ^, respectively. Between the inner metal ring 26 and the outer metal ring 32, along the axial direction, a metal flute 36 is spliced to the inner metal ring (9) and the outer side along the outer surface of the glass member 34 in the axial direction. The metal ring (10): the peripheral surface. The metal ring 32 connects the wire rod 2δ to the gold plate. The metal ring 26 makes the gold core 36 and the electrode support rod 22 electrically. The inner sealing tube formed by the glass is welded to the inner surface of the outer seal. It is configured coaxially. The glass member 34 and the metal case 36 which are sealed inside the tube are sealed by the outer sealing tube and sealed within 2° of the sealing tube. Further, the 'metal,' and the two shown in Fig. 2 are extremely thin compared to the inner sealing tube 38. Fixing ring made of quartz ::In the outer seal...the end portion is fixed in the axial direction of the inner 38. s Fig. 3 is an enlarged outer sealing tube 2. The glass tube is shown in the vicinity of the cross section 2258-l〇263-PF; Chentf 8 200941537. In the vicinity of the end portion 24T1 of the electrode-side glass tube 24, a tapered portion 24S having a thick front end is formed from the side of the light-emitting tube toward the metal ring side, and the outer sealing tube 2'' is also tapered along the tapered portion 24S. The tapered portion 24S is formed to prevent stress from being concentrated and formed into a smooth shape. With the tapered shape portion 24S, the diameter D1 in the end portion 24T1 of the electrode side glass tube 24 is larger than the diameter of the end portion 24T2 on the other side. Of course
後在端部24T1 ’圓筒狀的凹部讀同轴地形成，與外周面 的金屬箱36—體的内側金屬環26以及玻璃構件％插入於 凹部24N。即，端部24T1圍繞内側金屬環託。 端部24Τ1的直徑D2比内側封合管38的外徑大。並 亡’具有直徑D2的端部24T1的軸方向長度L比内側金屬 環26的厚度L0長。#，内側封合管38的端部38τι係沿 著轴方向在比金屬m 26還靠近封合f端部側的位置上與 電極側玻璃管24的端部24T1熔接。 、 而且，在電極側玻璃管24的端部24Τ1上，朝向封a 管端部側而形成前端細的錐拔形狀部> 24u，在與内側： 合管38熔接的端部24n的端面的直徑D3比直徑d““ 第4圖為插人安裝構件m於内側封合管⑽的溶接前 的概略剖視圖。第5圖為插入容納安裝構件"A的内側封 合管38於外側封合管2G的熔接前的概略 4、5圖說明封合工程。 之用第 狀態 第 4圖所示的内側封合管38係表示由燃燒器溶接 電極側玻料24 _部則騎接前的形狀 前的 〇 媳 πτρ 2258-10263-PF；Chentf 9 200941537 金屬環26的外徑大 外徑大的外徑。内侧 的外徑大。 部24T1的環狀突緣部24V具有比内側 的内徑，而且具有比内側封合管38的 封合管38的内徑比導電性的環狀構件 為了形成安裝構件18A，首先使内側金屬環26與電極 支持棒22熔接而一體化，電極支持棒以插入於電極側玻 璃管24。其次’將電極支持棒22壓入於陽極14而一體化。 又，外側金屬環32與導線棒28熔接而—體化。 ❹ 接著’與内侧金屬環26熔接的電極支持棒Μ以及與 外侧金屬環32熔接料線棒28插人於麵構件％的插入 β在玻璃構件34的兩端配置有内側金屬環26 與外側金屬環32。 而且，複數個帶狀的金屬羯36溶接於内側金屬環26 的外周面及外側金屬提q 9 屬環32的外周面，藉此，内側金屬環 26、玻璃構件34、外側金屬帛32成為-體。在本實施形 態中，六片金屬落以等間隔於軸方向延伸。 與外側金屬環32、金屬箱36以及玻璃構件34形成為 體的内側金屬核26插入於電極側玻璃管24的凹部⑽。 然後，使内側封合管38覆蓋於玻璃構件34。此時，玻璃 構件34與内側封合管38之間產生微小間隙。 而且，使外侧玻璃管35插人導線棒28，使固定環29 抵接於内側封合管38之同時使導線棒28插入固定環29。 内側封合管38的端部38T1與電極側玻璃管24的端部24T1 抵接，另-邊的端部38Τ2與固定環29抵接。藉此，内側 封合管38達成定位，抑制朝軸方向的移動。 2258-10263-PF；Chentf 10 200941537 當女裝構件18A被安裝函立壯^ 槿#丨以访 女裝再文裝内側封合管38後，安裝 構件m插入於外側封合管2 。 内2自厥#能”、、後，使放電空間1 1 呈負壓狀態，由燃燒器對外側封合管 — 使外側封合管2〇、内側封 ”、、。猎由加熱 24Τ2 以及電極側玻璃管的電 位倒鈿邛24Τ2縮小直徑，電極側 破璃S 24、玻璃構件34 以及外側玻璃管35熔接。藉 側封合管2〇内。 *裝構件⑽被封合於外 而且，陰極側的封合^盖；a、h人 . 了 口構&封合工程與陽極側相同。 根據本實施形態，在雙重封合構造的放電燈ι〇卜在 保持電極支持棒22的電極側破璃管24的端部簡卜朝 :封合管端部而形成前端粗的錐拔狀部分⑽。然後，端 β 24T1的直徑D1比另一邊的端部24τ2的直徑⑽大。即， 在内側金屬環26與玻璃管24的接觸面附近，電極侧玻璃 管24的直徑比其他部分的直徑大。 内側金屬環26與玻璃管24的接觸面由於為材質不同 的㈣面，在燈的使用t，燈的内壓力及熱應力容易被施 而备易產生間隙。在本實施形態中，藉由内側金屬環2 6 插入於玻璃管24的凹部24N，電極側玻璃管24圍繞接觸 面附近。因此，防止從接觸面附近產生裂縫，可防止外側 封合管20甚至發光管12由於裂縫而破損。 又’由於内側封合管38與電極側玻璃管24的端部24T1 的炫接部從内側金屬環26與電極侧玻璃管24的接觸面附 近分離’可防止以該熔接部為起點而產生裂縫。 另一方面’電極側玻璃管24的端部24T2的直徑D2可 2258-l〇263-PF;Chentf 200941537 設定成與單層封合構造大體上相同大小。藉此’可防止端 部24T2與外側封合管2G的厚度薄的熔接部分產生裂縫、 應力集令而造成管的破損。又，可抑制露出於放電空間U 的面積為小，可迅速地從開始亮燈移至定格電壓。 而且，在電極側玻璃管24的端部24T1形成前端細的 錐拔部分24U’内側封合f 38的外徑比電極側玻璃管24 的端部24T1的直徑D1 +。藉此，外側封合管2〇不必大直 徑化。 β 以上，由於内側封合管38定位於電極側玻璃管24的 端部24Τ1與固定環29之間，在放電燈的封合卫程中，内 側封合管38、外側封合管20可熔接在一起，而高效率地 製造出放電燈。 而且，並不限定於雙重封合構造，也可以是具備特定 強度形狀的三種以上的封合管重疊而熔接。内側封合管38 應配置成不超過内側金屬環26而延伸至發光管側。又 ❹璃管24Τ2的錐拔形狀部分2仏的形狀可根據需求而變更。 而且，也可是用於短弧型以外的放電燈的封合構造。 【圖式簡單說明】 第1圖為本實施形態的短弧型放電燈的概略剖視圖。 第2圖為陽極側的封合管的概略剖視圖。 第3圖為外側封合管的玻璃管附近的放大剖視圖。 第4圖為插入安裝構件於内側封合管38的溶接前的概 2258-l〇263-PF;Chentf 12 200941537 第5圖為插入容納安裝構件的内側封合管於外側封合 管的熔接前的概略剖視圖。 明 ； 說.，間 .， 號燈空管.， 符電電光極 件放放發陽 元 ~ ~ ~ ~ 要10111214 主 φ 1 6〜陰極； 18A、18B〜安裝構件； 2 0〜外側封合管； 22〜電極支持棒； 24〜電極側玻璃管（玻璃管）； 2 4 A〜軸孔； 24B〜圓筒狀孔； 24T1〜端部（環狀構件側端部）； 24T2〜端部（發光管側端部）； 24N〜凹部； 24S〜錐拔部分； 24U〜錐拔形狀部分； 24V〜環狀突緣部； 2 6〜内側金屬環（環狀構件）； 2 6 A〜軸孔； 28〜導線棒； 2258-10263-PF;Chentf 13 200941537 3 2〜外側金屬環； 3 2 B〜轴孔； 34〜玻璃構件； 34A、34B〜插入孔； 3 5〜外側玻璃管； 3 6〜金屬猪； 3 8〜内側封合管； 80A、80B〜蓋子； D1〜直徑（環狀構件側端部的直徑）； D2〜直徑（發光管側端部的直徑）。Thereafter, the cylindrical portion of the end portion 24T1' is read coaxially, and the inner metal ring 26 and the glass member % of the metal case 36 on the outer peripheral surface are inserted into the concave portion 24N. That is, the end portion 24T1 surrounds the inner metal ring bracket. The diameter D2 of the end portion 24Τ1 is larger than the outer diameter of the inner sealing tube 38. The length L of the end portion 24T1 having the diameter D2 is longer than the thickness L0 of the inner metal ring 26. #, the end portion 38 of the inner sealing tube 38 is welded to the end portion 24T1 of the electrode side glass tube 24 at a position closer to the end side of the sealing member f than the metal m 26 in the axial direction. Further, on the end portion 24Τ1 of the electrode-side glass tube 24, a tapered tapered portion > 24u is formed toward the end portion of the sealing tube, and the end surface of the end portion 24n which is welded to the inner tube 38 is formed. The diameter D3 is larger than the diameter d "" Fig. 4 is a schematic cross-sectional view before the insertion of the insertion member m to the inner sealing tube (10). Fig. 5 is a schematic view showing the sealing of the inner sealing tube 38 inserted into the mounting member "A before the welding of the outer sealing tube 2G. The inner sealing tube 38 shown in Fig. 4 of the fourth state indicates that 〇媳πτρ 2258-10263-PF before the shape before the riding of the electrode side glass frit 24 _ portion of the burner is melted; Chentf 9 200941537 metal ring The outer diameter of 26 is large and the outer diameter is large. The outer diameter of the inner side is large. The annular flange portion 24V of the portion 24T1 has an inner diameter larger than the inner side, and has an inner diameter than the inner diameter of the sealing tube 38 of the inner sealing tube 38. In order to form the mounting member 18A, the inner metal ring is first formed. 26 is integrated with the electrode support rod 22, and the electrode support rod is inserted into the electrode side glass tube 24. Next, the electrode support rod 22 is pressed into the anode 14 to be integrated. Further, the outer metal ring 32 is welded to the wire rod 28 to be formed into a body. ❹ Next, the electrode support rod 熔 welded to the inner metal ring 26 and the insertion line β of the outer metal ring 32 welded to the surface member 28 are disposed at the both ends of the glass member 34 with the inner metal ring 26 and the outer metal Ring 32. Further, a plurality of strip-shaped metal crucibles 36 are melted on the outer peripheral surface of the inner metal ring 26 and the outer peripheral surface of the outer metal lift ring 32, whereby the inner metal ring 26, the glass member 34, and the outer metal cymbal 32 become - body. In the present embodiment, six pieces of metal are dropped at equal intervals in the axial direction. The inner metal core 26 formed integrally with the outer metal ring 32, the metal case 36, and the glass member 34 is inserted into the concave portion (10) of the electrode side glass tube 24. Then, the inner sealing tube 38 is covered with the glass member 34. At this time, a slight gap is generated between the glass member 34 and the inner sealing tube 38. Further, the outer glass tube 35 is inserted into the wire rod 28, and the fixing ring 29 abuts against the inner sealing tube 38 while the wire rod 28 is inserted into the fixing ring 29. The end portion 38T1 of the inner sealing tube 38 abuts against the end portion 24T1 of the electrode side glass tube 24, and the other end portion 38Τ2 abuts against the fixing ring 29. Thereby, the inner sealing tube 38 is positioned to suppress the movement in the axial direction. 2258-10263-PF; Chentf 10 200941537 When the women's wear member 18A is installed, the letter is erected. 丨#丨访 Visit After the women's re-packaged inner sealing tube 38, the mounting member m is inserted into the outer sealing tube 2. After the inner 2 is 能 #能", and then, the discharge space 1 1 is in a negative pressure state, and the burner is sealed to the outside by the burner - the outer sealing tube is 2 〇, the inner side is sealed,". The hunting is performed by heating 24 Τ 2 and the potential of the electrode side glass tube is reduced by 24 Τ 2 to reduce the diameter, and the electrode side glazing S 24 , the glass member 34 and the outer glass tube 35 are welded. By the side sealing tube 2 inside. * The mounting member (10) is sealed to the outside and the sealing member on the cathode side; a, h person. The mouth structure & sealing construction is the same as the anode side. According to the present embodiment, the discharge lamp of the double sealing structure is formed at the end of the electrode side glass tube 24 of the holding electrode support rod 22, and the end portion of the tube is closed to form a thick tapered portion of the tip end. (10). Then, the diameter D1 of the end β 24T1 is larger than the diameter (10) of the end portion 24τ2 of the other side. That is, in the vicinity of the contact surface of the inner metal ring 26 and the glass tube 24, the diameter of the electrode side glass tube 24 is larger than the diameter of the other portions. The contact surface between the inner metal ring 26 and the glass tube 24 is a (four) surface having a different material. When the lamp is used t, the internal pressure and thermal stress of the lamp are easily applied and a gap is easily generated. In the present embodiment, the inner side metal ring 26 is inserted into the concave portion 24N of the glass tube 24, and the electrode side glass tube 24 surrounds the vicinity of the contact surface. Therefore, it is prevented that cracks are generated from the vicinity of the contact surface, and the outer sealing tube 20 or even the arc tube 12 can be prevented from being damaged by the crack. Further, since the seducing portion of the inner sealing tube 38 and the end portion 24T1 of the electrode side glass tube 24 is separated from the vicinity of the contact surface of the inner metal ring 26 and the electrode side glass tube 24, it is possible to prevent cracks from occurring as the starting point of the welded portion. . On the other hand, the diameter D2 of the end portion 24T2 of the electrode side glass tube 24 may be 2258-l 263-PF; and the Chentf 200941537 is set to be substantially the same size as the single layer sealing structure. Thereby, it is possible to prevent the welded portion of the thin portion of the end portion 24T2 and the outer sealing tube 2G from being cracked and the stress is gathered to cause breakage of the tube. Further, it is possible to suppress the area exposed to the discharge space U to be small, and it is possible to quickly move from the start of lighting to the freeze voltage. Further, at the end portion 24T1 of the electrode-side glass tube 24, the outer diameter of the inner tapered portion 24U' is formed to be smaller than the diameter D1 + of the end portion 24T1 of the electrode-side glass tube 24. Thereby, the outer sealing tube 2〇 does not have to be large in diameter. Above β, since the inner sealing tube 38 is positioned between the end portion 24Τ1 of the electrode side glass tube 24 and the fixing ring 29, the inner sealing tube 38 and the outer sealing tube 20 can be welded in the sealing process of the discharge lamp. Together, the discharge lamp is efficiently manufactured. Further, the present invention is not limited to the double sealing structure, and three or more sealing tubes having a specific strength shape may be overlapped and welded. The inner sealing tube 38 should be configured to extend beyond the inner metal ring 26 to the side of the light pipe. Further, the shape of the tapered portion 2仏 of the glass tube 24Τ2 can be changed as needed. Further, it may be a sealing structure for a discharge lamp other than the short arc type. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic cross-sectional view showing a short arc type discharge lamp of the embodiment. Fig. 2 is a schematic cross-sectional view of the sealing tube on the anode side. Fig. 3 is an enlarged cross-sectional view showing the vicinity of a glass tube of the outer sealing tube. Fig. 4 is a view showing the insertion of the mounting member before the fusion of the inner sealing tube 38. 2258-l〇263-PF; and the second drawing of the inner sealing tube inserted into the mounting member before the welding of the outer sealing tube A schematic cross-sectional view. Ming;,.,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, Tube; 22~electrode support rod; 24~electrode side glass tube (glass tube); 2 4 A~ shaft hole; 24B~cylindrical hole; 24T1~end (annular member side end); 24T2~end (light-emitting tube side end); 24N~recessed portion; 24S~cone-drawn portion; 24U~cone-shaped portion; 24V~annular flange portion; 2 6~inner metal ring (annular member); 2 6 A~axis Hole; 28~ wire rod; 2258-10263-PF; Chentf 13 200941537 3 2~ outer metal ring; 3 2 B~ shaft hole; 34~glass member; 34A, 34B~ insertion hole; 3 5~ outside glass tube; 6 to metal pig; 3 8 to inner sealing tube; 80A, 80B to lid; D1 to diameter (diameter of the end portion of the annular member); D2 to diameter (diameter of the end portion of the arc tube).
2258-10263-PF;Chentf 142258-10263-PF; Chentf 14