JP2007280824A - Discharge lamp - Google Patents

Discharge lamp Download PDF

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Publication number
JP2007280824A
JP2007280824A JP2006107173A JP2006107173A JP2007280824A JP 2007280824 A JP2007280824 A JP 2007280824A JP 2006107173 A JP2006107173 A JP 2006107173A JP 2006107173 A JP2006107173 A JP 2006107173A JP 2007280824 A JP2007280824 A JP 2007280824A
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Prior art keywords
tube
holding cylinder
diameter
glass member
diameter portion
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JP2006107173A
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JP4487969B2 (en
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Yoshio Kagebayashi
由郎 影林
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Ushio Denki KK
Ushio Inc
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Ushio Denki KK
Ushio Inc
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Priority to JP2006107173A priority Critical patent/JP4487969B2/en
Priority to TW096100352A priority patent/TW200739657A/en
Priority to KR1020070012177A priority patent/KR101066780B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65F—GATHERING OR REMOVAL OF DOMESTIC OR LIKE REFUSE
    • B65F1/00—Refuse receptacles; Accessories therefor
    • B65F1/0033—Refuse receptacles; Accessories therefor specially adapted for segregated refuse collecting, e.g. receptacles with several compartments; Combination of receptacles
    • B65F1/0053—Combination of several receptacles
    • B65F1/0073—Flexible receptacles fixed on a frame or in an enclosure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65F—GATHERING OR REMOVAL OF DOMESTIC OR LIKE REFUSE
    • B65F1/00—Refuse receptacles; Accessories therefor
    • B65F1/04—Refuse receptacles; Accessories therefor with removable inserts
    • B65F1/06—Refuse receptacles; Accessories therefor with removable inserts with flexible inserts, e.g. bags or sacks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65F—GATHERING OR REMOVAL OF DOMESTIC OR LIKE REFUSE
    • B65F1/00—Refuse receptacles; Accessories therefor
    • B65F1/14—Other constructional features; Accessories
    • B65F1/141—Supports, racks, stands, posts or the like for holding refuse receptacles
    • B65F1/1415—Supports, racks, stands, posts or the like for holding refuse receptacles for flexible receptables, e.g. bags, sacks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65F—GATHERING OR REMOVAL OF DOMESTIC OR LIKE REFUSE
    • B65F2210/00—Equipment of refuse receptacles
    • B65F2210/18—Suspending means

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a discharge lamp that will not rupture upon lighting and will not suffer chipping of a tip of a holding cylindrical body located on an arc tube side even if an electrode-side portion of a sealing conductive part inserted to a side tube is inclined downward in the diameter direction with respect to the axial direction. <P>SOLUTION: The discharge lamp comprises: a sealing body having the side tube provided at each end of the arc tube; a glass member disposed inside the side tube; a metal foil disposed along the perimeter of the glass member; an electrode core rod disposed to extend from the side tube to the inside of the arc tube; an electrode provided at the tip of the electrode core rod; and the holding cylindrical body disposed between the perimeter of the electrode core rod and the inner surface of the side tube, the tip of the holding cylindrical body located on the arc tube side being processed into a tapered shape. The holding cylindrical body comprises a small-diameter portion located on the arc tube side, a large-diameter portion located on the glass member side, and a tapered portion connecting the small-diameter portion and the large-diameter portion to each other. <P>COPYRIGHT: (C)2008,JPO&INPIT

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箔シール構造を有する放電ランプに関する。   The present invention relates to a discharge lamp, and more particularly to a discharge lamp having a foil seal structure particularly suitable for a large current.

放電ランプは、一般にこれ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。   Discharge lamps are widely used in fields that generally use ultraviolet rays emitted therefrom, such as the photochemical industry field, semiconductor device manufacturing field, and other fields.

大電流用の放電ランプにおいては、発光ガスの主成分である水銀の封入量が多く、点灯時に発光管内部が高圧となり、しかも発熱量が大きく、したがって、特に側管やその内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ずるような低い温度部分がないことが必要である。   In discharge lamps for large currents, the amount of mercury that is the main component of the luminescent gas is large, the inside of the arc tube is at a high pressure during lighting, and the amount of heat generation is large, so especially in the side tube and the glass inside it. High heat resistance and pressure resistance are required. During the 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 mercury is condensed in the arc tube during the lighting.

このようなことから、大電流用の放電ランプにおいては、発光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、発光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箔シール構造が採用されている。   For this reason, in the discharge lamp for large current, by directly welding the glass forming the arc tube to the lead rod for power feeding, it is not a so-called rod seal structure that achieves hermetic sealing of the arc tube, A foil seal structure using a metal foil for sealing is employed.

図７は、箔シール構造を有する放電ランプの一例を示す説明図である。実開平６−７３８５６号公報にも示されるように、放電ランプは、発光管８２の両端に側管８１を備えた封体８内に電極９が配置されるように、封着用導電部Ｍが側管８１に封着される。封着用導電部Ｍはガラス部材１および金属箔２、金属板３、電極芯棒４、外部リード棒５、保持用筒体６、外部リード棒保持用筒体７、電極９より構成される。   FIG. 7 is an explanatory view showing an example of a discharge lamp having a foil seal structure. As shown in Japanese Utility Model Laid-Open No. 6-73856, the discharge lamp has a sealing conductive portion M such that the electrodes 9 are disposed in the sealing body 8 having the side tubes 81 at both ends of the arc tube 82. Sealed to the side tube 81. The sealing conductive portion M includes a glass member 1 and a metal foil 2, a metal plate 3, an electrode core bar 4, an external lead bar 5, a holding cylinder 6, an external lead bar holding cylinder 7, and an electrode 9.

筒状のガラス部材１に、外周面を軸方向に伸びるように帯状の金属箔２が、例えば５枚互いに離間して配置されている。これらの金属箔２の先端部は、電極芯棒４の基端部に配置された金属板３に接続されている。一方、金属箔２の後端部は、外部リード棒５を挿通する金属部材５１に接続されている。そして、電極芯棒４の外周には、発光管側の先端部６２がテーパ状に加工され、側部６２１が薄肉部６６となっているガラス製の保持用筒体６が配置されて、ガラス部材１の後端には、金属部材５１を介して、ガラス製の外部リード棒保持用筒体７が配置される。また、９は電極芯棒４の先端に固定して設けた電極である。   For example, five strip-shaped metal foils 2 are disposed on the cylindrical glass member 1 so as to extend in the axial direction on the outer peripheral surface thereof. The distal end portions of these metal foils 2 are connected to a metal plate 3 disposed at the proximal end portion of the electrode core rod 4. On the other hand, the rear end portion of the metal foil 2 is connected to a metal member 51 through which the external lead bar 5 is inserted. Further, on the outer periphery of the electrode core rod 4, there is disposed a glass holding cylinder 6 in which a tip portion 62 on the arc tube side is processed into a taper shape and a side portion 621 is a thin portion 66, and glass A glass-made external lead bar holding cylinder 7 is disposed at the rear end of the member 1 through a metal member 51. Reference numeral 9 denotes an electrode fixed to the tip of the electrode core 4.

上記のように構成された封着用導電部Ｍを封体８の側管８１内に封止する手順は、封体８を軸方向水平となるように設置し、封着用導電部Ｍを側管８１に電極９が発光管８２内に位置するよう挿入配置する。このとき側管８１の内径は、封着用導電部Ｍを挿入しやすいように、封着用導電部Ｍの最大径を有する電極９の外径より例えば３ｍｍ程度大きくなっている。そして、この封着用導電部Ｍが挿入配置された側管８１を、側管８１の外部からバーナー等を用いて加熱処理して、側管８１の内周と保持用筒体６、および、側管８１の内周とガラス部材１の外周とを金属箔２を介して気密に溶着させる。このとき、保持用筒体６の先端部６２はテーパ状に加工されているので、保持用筒体６の発光管側は、他と比較して小さい熱量で過熱しても側管８１を溶着することができ、側管８１の保持用筒体６より発光管側を過剰に加熱して変形させることがない。
また、他方の側管８１においても、封着用導電部Ｍを上述と同様にして接続する。 The procedure for sealing the sealing conductive portion M configured as described above in the side tube 81 of the envelope 8 is to install the seal 8 so as to be horizontal in the axial direction, and to connect the sealing conductive portion M to the side tube. The electrode 9 is inserted and arranged at 81 so that the electrode 9 is positioned in the arc tube 82. At this time, the inner diameter of the side tube 81 is, for example, about 3 mm larger than the outer diameter of the electrode 9 having the maximum diameter of the sealing conductive portion M so that the sealing conductive portion M can be easily inserted. Then, the side tube 81 in which the sealing conductive portion M is inserted and disposed is heat-treated from the outside of the side tube 81 using a burner or the like, so that the inner periphery of the side tube 81 and the holding cylinder 6 and the side The inner periphery of the tube 81 and the outer periphery of the glass member 1 are welded hermetically through the metal foil 2. At this time, since the distal end portion 62 of the holding cylinder 6 is processed into a tapered shape, the arc tube side of the holding cylinder 6 welds the side tube 81 even if it is overheated with a smaller amount of heat than others. The arc tube side is not excessively heated and deformed from the holding tube 6 of the side tube 81.
Also, in the other side tube 81, the sealing conductive portion M is connected in the same manner as described above.

しかしながら、大電流用の放電ランプにおいては、電極９には大きな熱容量が必要とされるため、例えば７００ｇ以上のものが使用される。このような電極９が設置された封着用導電部Ｍは、その外径より大きい内径を有する側管８１内に挿入配置されると、封着用導電部Ｍの後端側の重量に比較して電極９の重量が大きいため、後端側と電極側とのバランスがとれず、側管８の軸方向に対して電極側が径方向に傾いた状態で配置されることになる。   However, in the discharge lamp for large current, since the electrode 9 needs a large heat capacity, for example, a lamp having a capacity of 700 g or more is used. When the sealing conductive portion M provided with such an electrode 9 is inserted and arranged in the side tube 81 having an inner diameter larger than the outer diameter, the sealing conductive portion M is compared with the weight of the rear end side of the sealing conductive portion M. Since the weight of the electrode 9 is large, the rear end side and the electrode side cannot be balanced, and the electrode side is disposed in a state of being inclined in the radial direction with respect to the axial direction of the side tube 8.

図８は、電極側が径方向下方に傾いた状態で配置された放電ランプを示す拡大断面図である。
側管８１内で封着用導電部Ｍが傾くと、封着用導電部Ｍは、後端側では外部リード棒保持用筒体７の後端面７１の側部７２が側管８１に当接し、電極側では保持用筒体６の先端部６２の側部６２１が側管８１に当接する。保持用筒体６の発光管側の先端部６２の側部６２１は薄肉部６６となっているため、荷重がかかると欠けやすい。保持用筒体６が欠けると、点灯時にそこから亀裂が入り放電ランプが破裂することや、欠けた破片によって封体８に傷がついて、点灯中に放電ランプが破裂する恐れがある。
実開平６−７３８５６号公報 FIG. 8 is an enlarged cross-sectional view showing a discharge lamp arranged with the electrode side tilted downward in the radial direction.
When the sealing conductive portion M is tilted in the side tube 81, the side 72 of the rear end surface 71 of the external lead rod holding cylinder 7 abuts the side tube 81 on the rear end side. On the side, the side portion 621 of the distal end portion 62 of the holding cylinder 6 contacts the side tube 81. Since the side portion 621 of the distal end portion 62 on the arc tube side of the holding cylinder 6 is a thin portion 66, it is easily chipped when a load is applied. If the holding cylinder 6 is chipped, there is a risk that the discharge lamp may burst during lighting and the discharge lamp may rupture, or the sealed body 8 may be damaged by the chipped pieces, and the discharge lamp may burst during lighting.
Japanese Utility Model Publication No. 6-73856

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、側管内に挿入された封着用導電部の電極側が軸方向に対して径方向下方に傾いても、保持用筒体の発光管側の先端部が欠けることがなく、点灯時に破裂しない放電ランプを提供することを目的とする。   The present invention has been made based on the above circumstances, and even if the electrode side of the sealing conductive portion inserted into the side tube is inclined downward in the radial direction with respect to the axial direction, the light emission of the holding cylinder is achieved. It is an object of the present invention to provide a discharge lamp that does not have a tip on the tube side and that does not rupture when lit.

本願第１の発明は、発光管の両端に側管が設けられた封体と、前記側管の内部に配置されたガラス部材と、前記ガラス部材の外周に沿って配置された金属箔と、前記側管から前記発光管の内部に伸びるように配置された電極芯棒と、前記電極芯棒の先端に設けられた電極と、前記電極芯棒の外周と前記側管の内周との間に配置され、発光管側の先端部がテーパ状に加工された保持用筒体とを備えた放電ランプにおいて、前記保持用筒体は、発光管側の小径部と、ガラス部材側の大径部と、小径部と大径部をつなぐテーパ部からなることを特徴とする。   The first invention of the present application is a sealed body in which side tubes are provided at both ends of the arc tube, a glass member disposed inside the side tube, a metal foil disposed along the outer periphery of the glass member, An electrode core rod disposed so as to extend from the side tube to the inside of the arc tube, an electrode provided at the tip of the electrode core rod, and an outer periphery of the electrode core rod and an inner periphery of the side tube In the discharge lamp provided with the holding tube whose tip on the arc tube side is tapered, the holding cylinder includes a small diameter portion on the arc tube side and a large diameter on the glass member side. And a tapered portion connecting the small diameter portion and the large diameter portion.

また、本願第２の発明は、本願第１の発明において、前記保持用筒体は、ガラス部材側の後端部がテーパ状に加工され、その内径がガラス部材の発光管側の先端面の外径より大きく、ガラス部材を覆うように形成されていることを特徴とする。   Further, according to a second aspect of the present invention, in the first aspect of the present invention, the holding cylinder has a glass member-side rear end processed into a taper shape, and an inner diameter of the glass tube-side distal end surface of the arc tube It is larger than the outer diameter and is formed so as to cover the glass member.

本発明に係る放電ランプによれば、側管内で封着用導電部の電極側が軸方向に対して径方向下方に傾いても、保持用筒体が、発光管側の小径部と、ガラス部材側の大径部と、小径部と大径部をつなぐテーパ部からなるように構成されるので、保持用筒体の発光管側の先端部の側部ではなく、保持用筒体の大径部の先端側部が側管に当接するため、保持用筒体の発光管側の先端部が欠けることがない。これより、点灯時に破裂が発生しない放電ランプを提供することができる。   According to the discharge lamp according to the present invention, even if the electrode side of the conductive portion for sealing in the side tube is inclined downward in the radial direction with respect to the axial direction, the holding cylinder has the small-diameter portion on the arc tube side and the glass member side. Large diameter portion and a tapered portion connecting the small diameter portion and the large diameter portion, so that the large diameter portion of the holding cylinder is not the side portion of the distal end portion on the arc tube side of the holding cylinder. Since the front end side portion of the tube is in contact with the side tube, the tip end portion on the arc tube side of the holding cylinder is not chipped. Thus, it is possible to provide a discharge lamp that does not rupture when lit.

本発明の第１の実施形態について説明する。図１は、本発明の放電ランプを示す説明用断面図である。
この図において、１は円柱状のガラス部材、２は帯状の金属箔、３はディスク状の金属板、４は電極芯棒、５は外部リード棒、６は保持用筒体、７は外部リード棒保持用筒体、９は電極であり、８は発光管８２とその両端に側管８１が設けられた封体である。 A first embodiment of the present invention will be described. FIG. 1 is an explanatory sectional view showing a discharge lamp of the present invention.
In this figure, 1 is a cylindrical glass member, 2 is a strip-shaped metal foil, 3 is a disk-shaped metal plate, 4 is an electrode core bar, 5 is an external lead bar, 6 is a holding cylinder, and 7 is an external lead. A rod holding cylinder, 9 is an electrode, and 8 is a sealed body provided with an arc tube 82 and side tubes 81 at both ends thereof.

放電ランプは、発光管８２の両端に側管８１を備えた封体８内に電極９が配置されるように、封着用導電部Ｍが側管８１に封着される。封着用導電部Ｍはガラス部材１および金属箔２、金属板３、電極芯棒４、外部リード棒５、保持用筒体６、外部リード棒保持用筒体７、電極９より構成される。
円柱状のガラス部材１は、発光管側の先端面１１には、ディスク状の金属板３が配置され、後端面１２に外部リード棒５を設置するための孔１３が形成されている。金属板３の中央には、電極芯棒４が側管８１から発光管８２に向けて封体８の軸方向に伸びるように固定されている。この電極芯棒４の先端には電極９が設けられている。 In the discharge lamp, the sealing conductive portion M is sealed to the side tube 81 so that the electrode 9 is disposed in the sealed body 8 provided with the side tube 81 at both ends of the arc tube 82. The sealing conductive portion M includes a glass member 1 and a metal foil 2, a metal plate 3, an electrode core bar 4, an external lead bar 5, a holding cylinder 6, an external lead bar holding cylinder 7, and an electrode 9.
In the cylindrical glass member 1, a disc-shaped metal plate 3 is disposed on the front end surface 11 on the arc tube side, and a hole 13 for installing the external lead bar 5 is formed on the rear end surface 12. At the center of the metal plate 3, the electrode core rod 4 is fixed so as to extend in the axial direction of the envelope 8 from the side tube 81 toward the arc tube 82. An electrode 9 is provided at the tip of the electrode core rod 4.

金属板３と電極芯棒４との接続方法は特に限定されないが、例えば金属板３と電極芯棒４とを付き合わせ溶接することや、金属板３の中央に穴を形成し、この穴に電極芯棒４の基端を挿入して両者を溶接する方法などを用いることができる。金属板３を構成するための材料としては、タンタル、ニオブ、タングステン、モリブデンなどの高融点金属が挙げられる。   The connection method of the metal plate 3 and the electrode core rod 4 is not particularly limited. For example, the metal plate 3 and the electrode core rod 4 are attached to each other and welded, or a hole is formed in the center of the metal plate 3. For example, a method of inserting the proximal end of the electrode core rod 4 and welding them together can be used. Examples of the material for forming the metal plate 3 include refractory metals such as tantalum, niobium, tungsten, and molybdenum.

ガラス部材１の孔１３の内部には、これに適合する外径を有する外部リード棒５が挿入され、ガラス部材１の後端面１２には、外部リード棒５に接続されるように穴が形成された金属部材５１が配置され、この金属部材５１を介して、ガラス製の外部リード棒保持用筒体７が配置されている。金属部材５１を構成するための材料としては、モリブデンなどが挙げられる。   An external lead bar 5 having an outer diameter suitable for this is inserted into the hole 13 of the glass member 1, and a hole is formed on the rear end surface 12 of the glass member 1 so as to be connected to the external lead bar 5. The metal member 51 is disposed, and the external lead rod holding cylinder 7 made of glass is disposed through the metal member 51. Examples of the material for forming the metal member 51 include molybdenum.

ガラス部材１の外周においては、その周方向に互いに離間して、ガラス部材１の軸方向に伸びる帯状のモリブデン製の金属箔２が、例えば５枚配置され、これらの金属箔２の各々の先端部２１は、ガラス部材１に沿って伸び、さらに電極芯棒３の基端部に配置された金属板３にスポット溶接などの手段によって接続されている。また、金属箔２の各々の後端部２２は金属部材５１と接続されている。   On the outer periphery of the glass member 1, for example, five strip-shaped molybdenum metal foils 2 that are spaced apart from each other in the circumferential direction and extend in the axial direction of the glass member 1 are arranged, and the tips of each of these metal foils 2 are arranged. The portion 21 extends along the glass member 1 and is connected to the metal plate 3 disposed at the base end portion of the electrode core 3 by means such as spot welding. Further, the rear end portion 22 of each metal foil 2 is connected to the metal member 51.

また、電極芯棒４の外周と封体８の側管８１の内周との間には、ガラス製の保持用筒体６が配置されている。保持用筒体６は、ガラス部材１側の後端部６１の径より、発光管側の先端部６２の径の方が小さくなるように形成され、先端部６２に続く円柱状の小径部６４と、後端部６１に続く円柱状の大径部６３と、小径部６４と大径部６３をつなぐテーパ部６５とから構成される。   Further, a glass holding cylinder 6 is disposed between the outer periphery of the electrode core rod 4 and the inner periphery of the side tube 81 of the sealing body 8. The holding cylinder 6 is formed such that the diameter of the distal end portion 62 on the arc tube side is smaller than the diameter of the rear end portion 61 on the glass member 1 side, and a cylindrical small diameter portion 64 following the distal end portion 62. And a cylindrical large-diameter portion 63 following the rear end portion 61, and a tapered portion 65 connecting the small-diameter portion 64 and the large-diameter portion 63.

また、側管８１の内周と保持用筒体６を気密に溶着させるときに、側管８１の保持用筒体６より発光管側を過剰に加熱して変形させないように、保持用筒体６の先端部６２はテーパ状に加工され、中央がすり鉢状に凹み、側部６２１は薄肉部６６となっている。このように加工することによって、保持用筒体６の発光管側は、他と比較して小さい熱量で過熱しても側管８１を溶着することができ、側管８１の保持用筒体６より発光管側を過剰に加熱して変形させることがない。   Further, when the inner periphery of the side tube 81 and the holding tube 6 are welded in an air-tight manner, the holding tube is made so that the arc tube side is not excessively heated and deformed from the holding tube 6 of the side tube 81. 6 is processed into a taper shape, the center is recessed in a mortar shape, and the side portion 621 is a thin portion 66. By processing in this way, the side tube 81 can be welded to the arc tube side of the holding tube 6 even if it is overheated with a smaller amount of heat than the other, and the holding tube 6 of the side tube 81 can be welded. The arc tube side is not excessively heated and deformed.

上記放電ランプの数値例を挙げると以下のとおりである。
封体８は、全長が１５０ｍｍ、発光管８２の最大外径が１２０ｍｍ、側管８１の最大外径が３５ｍｍである。発光管８２の内部における封入水銀密度は、２０ｍｇ／ｃｍ３〜５０ｍｇ／ｃｍ３の範囲であって、例えば４０ｍｇ／ｃｍ３である。発光管８２には、不活性ガスとしてキセノンガスが５０ｋＰａ〜３００ｋＰａ封入されている。
さらに、ガラス部材１は、全長が４０ｍｍ〜９０ｍｍの範囲であって、例えば６０ｍｍであり、外径が２０ｍｍ〜５０ｍｍの範囲であって、例えば２３．５ｍｍである。保持筒体６の大径部６３の全長が５ｍｍ〜２０ｍｍの範囲であって、例えば１０ｍｍであり、大径部６３の外径が２０ｍｍ〜５０ｍｍの範囲であって、例えば３０ｍｍであり、小径部６４の全長が５ｍｍ〜２０ｍｍの範囲であって、例えば１５ｍｍであり、小径部６４の外径が１５ｍｍ〜４０ｍｍの範囲であって、例えば２０ｍｍであり、テーパ部６５の全長が３ｍｍ〜２０ｍｍの範囲であって、例えば５ｍｍである。電極９は、全長が６０ｍｍ、最大外径が３０ｍｍであって、重量が例えば８００ｇである。 A numerical example of the discharge lamp is as follows.
The envelope 8 has a total length of 150 mm, a maximum outer diameter of the arc tube 82 of 120 mm, and a maximum outer diameter of the side tube 81 of 35 mm. Mercury filling density in the interior of the light emission tube 82 is in a range of 20mg / cm 3 ~50mg / cm 3 , for example, 40 mg / cm 3. The arc tube 82 is filled with 50 kPa to 300 kPa of xenon gas as an inert gas.
Furthermore, the glass member 1 has a total length in a range of 40 mm to 90 mm, for example, 60 mm, and an outer diameter in a range of 20 mm to 50 mm, for example, 23.5 mm. The overall length of the large-diameter portion 63 of the holding cylinder 6 is in the range of 5 mm to 20 mm, for example 10 mm, the outer diameter of the large-diameter portion 63 is in the range of 20 mm to 50 mm, for example 30 mm, and the small-diameter portion The total length of 64 is in the range of 5 mm to 20 mm, for example, 15 mm, the outer diameter of the small diameter portion 64 is in the range of 15 mm to 40 mm, for example, 20 mm, and the total length of the tapered portion 65 is in the range of 3 mm to 20 mm. For example, it is 5 mm. The electrode 9 has a total length of 60 mm, a maximum outer diameter of 30 mm, and a weight of, for example, 800 g.

上記のように構成された封着用導電部Ｍを封体８の側管８１に封止する手順は、封体８を軸方向水平となるように設置し、封着用導電部Ｍを側管８１に電極９が発光管８２内に位置するように挿入配置する。このとき側管８１の内径は、封着用導電部Ｍを挿入しやすいように、封着用導電部Ｍの最大径を有する電極９の外径より０．５mmから３mm、例えば３ｍｍ程度大きくなっている。そして、この封着用導電部Ｍが挿入配置された側管８１を、側管８１の外部からバーナー等を用いて加熱処理して、側管８１の内周と保持用筒体６、および、側管８１の内周とガラス部材１の外周とを金属箔２を介して気密に溶着させる。また、他方の側管８１においても、封着用導電部Ｍを上述と同様にして封止する。   The procedure for sealing the sealing conductive portion M configured as described above to the side tube 81 of the envelope 8 is such that the seal 8 is installed so as to be horizontal in the axial direction, and the sealing conductive portion M is connected to the side tube 81. The electrode 9 is inserted and arranged so as to be positioned in the arc tube 82. At this time, the inner diameter of the side tube 81 is 0.5 mm to 3 mm, for example, about 3 mm larger than the outer diameter of the electrode 9 having the maximum diameter of the sealing conductive part M so that the sealing conductive part M can be easily inserted. . Then, the side tube 81 in which the sealing conductive portion M is inserted and disposed is heat-treated from the outside of the side tube 81 using a burner or the like, so that the inner periphery of the side tube 81 and the holding cylinder 6 and the side The inner periphery of the tube 81 and the outer periphery of the glass member 1 are welded hermetically through the metal foil 2. Also, in the other side tube 81, the sealing conductive portion M is sealed in the same manner as described above.

図２は、本発明の放電ランプ製造途中において、封着用導電部Ｍを側管８１内に挿入配置した状態を示す拡大断面図である。
本構成においても、封着用導電部Ｍは、その外径より大きい内径を有する側管８１内に挿入配置されると、封着用導電部Ｍの後端側の重量に比較して電極９の重量が大きいため、後端側と電極側とのバランスがとれず、側管８１の軸方向に対して電極側が径方向下方に傾いた状態で配置されることになる。 FIG. 2 is an enlarged cross-sectional view showing a state in which the sealing conductive portion M is inserted and arranged in the side tube 81 during the manufacture of the discharge lamp of the present invention.
Also in this configuration, when the sealing conductive portion M is inserted and arranged in the side tube 81 having an inner diameter larger than the outer diameter, the weight of the electrode 9 compared with the weight of the rear end side of the sealing conductive portion M. Therefore, the balance between the rear end side and the electrode side is not achieved, and the electrode side is disposed in a state of being inclined downward in the radial direction with respect to the axial direction of the side tube 81.

しかしながら、保持用筒体６は、発光管側の小径部６４と、ガラス部材側の大径部６３と、小径部６４と大径部６３をつなぐテーパ部６５からなるように構成されるので、封着用導電部Ｍは、側管８１内で軸方向に対して電極側が径方向下方に傾くと、後端側では外部リード棒保持用筒体７の後端面７１の側部７２が側管８１に当接し、発光管側では保持用筒体６の大径部６３の先端側部６３１が側管８１に当接する。大径部６３とテーパ部６５の接続面は、９０°以上の鈍角となるように形成されている上に、先端部６２のようにテーパ状に加工された薄肉部６６とはなっていないので、大径部６３の先端側部６３１が側管８１と当接して荷重がかかっても欠ける恐れがない。また、点灯時に保持用筒体６の欠けから亀裂が入り放電ランプが破裂することもなく、欠けた破片によって封体８に傷がついて、点灯中に放電ランプが破裂することもない。   However, since the holding cylinder 6 is configured to include a small-diameter portion 64 on the arc tube side, a large-diameter portion 63 on the glass member side, and a tapered portion 65 that connects the small-diameter portion 64 and the large-diameter portion 63, When the electrode portion in the side tube 81 is inclined downward in the radial direction with respect to the axial direction in the side tube 81, the side portion 72 of the rear end surface 71 of the external lead rod holding cylinder 7 is connected to the side tube 81 on the rear end side. The distal end side portion 631 of the large diameter portion 63 of the holding cylinder 6 is in contact with the side tube 81 on the arc tube side. The connecting surface of the large diameter portion 63 and the tapered portion 65 is formed to have an obtuse angle of 90 ° or more, and is not a thin portion 66 processed into a tapered shape like the tip portion 62. Even if the distal end side portion 631 of the large diameter portion 63 abuts on the side tube 81 and a load is applied, there is no fear of chipping. In addition, a crack is generated from the chipping of the holding cylinder 6 at the time of lighting, and the discharge lamp does not rupture, and the sealed body 8 is not damaged by the chipped fragments, and the discharge lamp does not rupture during lighting.

図３は、保持用筒体６の形状に必要となる条件を説明するための図面である。
この図において、Ｄ１は保持用筒体６の小径部６４の直径、Ｄ２は大径部６３の直径、Ｌ１は小径部６４からテーパ部６５までの軸方向の長さ、Ｌ２は保持用筒体６の大径部６３からガラス部材１、外部リード棒保持用筒体７までの軸方向の長さを示す。また、θ１は封着用導電部Ｍの側管８１に対する傾きの角度、θ２は保持用筒体６に小径部６４を設けることによって得られる許容角度を示す。
θ１がθ２より大きい、すなわちθ１＞θ２の場合、保持用筒体６の薄肉部６６が側管８１に当接するので、保持用筒体６の先端が欠ける恐れがある。
θ１とθ２の大きさが等しい、すなわちθ１＝θ２の場合、保持用筒体６の薄肉部６６と、大径部６３の先端側部６３１が、共に側管８１に当接する。封着用導電部Ｍの電極側にかかる荷重は２つに分散されるが、保持用筒体６の先端が欠ける恐れがある。
θ１がθ２より小さい、すなわちθ１＜θ２の場合、保持用筒体６の大径部６３の先端側部６３１が側管８１に当接する。大径部６３の先端側部６３１は、側管８１と当接して荷重がかかっても欠ける恐れがないので、点灯中に放電ランプが破裂することがない。
これより、θ１がθ２より小さい、すなわちθ１＜θ２となるように構成しなければならない。 FIG. 3 is a view for explaining conditions necessary for the shape of the holding cylinder 6.
In this figure, D 1 is the diameter of the small diameter portion 64 of the holding cylinder 6, D 2 is the diameter of the large diameter portion 63, L 1 is the axial length from the small diameter portion 64 to the tapered portion 65, and L 2 is The axial length from the large-diameter portion 63 of the holding cylinder 6 to the glass member 1 and the external lead rod holding cylinder 7 is shown. In addition, θ 1 is an inclination angle of the sealing conductive portion M with respect to the side tube 81, and θ 2 is an allowable angle obtained by providing the holding cylinder 6 with the small diameter portion 64.
When θ 1 is larger than θ 2 , that is, θ 1 > θ 2 , the thin-walled portion 66 of the holding cylinder 6 comes into contact with the side tube 81, so that the tip of the holding cylinder 6 may be missing.
When the magnitudes of θ 1 and θ 2 are equal, that is, θ 1 = θ 2 , the thin portion 66 of the holding cylinder 6 and the distal end side portion 631 of the large diameter portion 63 both come into contact with the side tube 81. Although the load applied to the electrode side of the sealing conductive portion M is distributed in two, the tip of the holding cylinder 6 may be missing.
When θ 1 is smaller than θ 2 , that is, when θ 1 <θ 2 , the distal end side portion 631 of the large-diameter portion 63 of the holding cylinder 6 contacts the side tube 81. Since the distal end side portion 631 of the large diameter portion 63 abuts against the side tube 81 and there is no fear of chipping even when a load is applied, the discharge lamp does not rupture during lighting.
From this, theta 1 is theta 2 smaller, i.e. must be configured so that θ 1 <θ 2.

θ１とθ２の大きさを三角関数より求める。
封着用導電部Ｍを側管８１内に容易に挿入できるように、側管８１の内径は、保持用筒体６の外径に比べて大きく設計されている。しかし、側管８１の内径が大きすぎると封着用導電部Ｍが傾いて作業性が悪くなることから、現実的には、側管８１の内径は、封着用導電部Ｍの外形より、例えば３ｍｍ大きく設計される。このとき、封着用導電部Ｍの側管８１に対する傾きの角度θ１は、
θ１＝ｔａｎ−１（３／Ｌ２）
となる。封着用導電部Ｍがさらに時計回りに回転して、保持用筒体６の薄肉部６６と、大径部６３の先端側部６３１が側管８１に当接したとき、保持用筒体６に小径部６４を設けることによって得られる許容角度θ２は、
θ２＝ｔａｎ−１（（Ｄ２−Ｄ１）／２Ｌ１）
となる。θ１＜θ２となることが、保持用筒体６の薄肉部６６が側管８１に当接しない条件であるので、
Ｄ２−Ｄ１＜６Ｌ１／Ｌ２
となるように、保持用筒体６を形成しなければならない。 The magnitudes of θ 1 and θ 2 are obtained from trigonometric functions.
The inner diameter of the side tube 81 is designed to be larger than the outer diameter of the holding cylinder 6 so that the sealing conductive portion M can be easily inserted into the side tube 81. However, if the inner diameter of the side tube 81 is too large, the sealing conductive part M is inclined and the workability is deteriorated. Therefore, the inner diameter of the side tube 81 is practically 3 mm, for example, from the outer shape of the sealing conductive part M. Largely designed. At this time, the inclination angle θ 1 of the conductive portion M for sealing with respect to the side tube 81 is
θ 1 = tan −1 (3 / L 2 )
It becomes. When the sealing conductive portion M further rotates clockwise and the thin-walled portion 66 of the holding cylinder 6 and the distal end side portion 631 of the large-diameter portion 63 contact the side tube 81, the holding cylinder 6 The allowable angle θ 2 obtained by providing the small diameter portion 64 is
θ 2 = tan −1 ((D 2 −D 1 ) / 2L 1 )
It becomes. Since θ 1 <θ 2 is a condition that the thin portion 66 of the holding cylinder 6 does not contact the side tube 81,
D 2 -D 1 <6L 1 / L 2
Thus, the holding cylinder 6 must be formed.

続いて、本発明の第２の実施形態について説明する。図４は、本発明の放電ランプを示す拡大断面図である。
図４に示すガラス部材１は、第１の実施形態の放電ランプと異なり、先端面１１に続く部分に先細りのテーパ状の外周面１４を有し、先端面１１側が円錐台状に構成されている。また、保持用筒体６は、ガラス部材１側の後端部６１に続いて発光管側が次第に大径となるように傾斜面６８が形成される。しかしながら、先端部６２は、第１の実施形態と同様に、径が小さくなるように形成される。保持用筒体６は、先端部６２に続く円柱状の小径部６４と、後端部６１に続く大径部６３と、小径部６４と大径部６３をつなぐテーパ部６５とから構成され、先端部６２はテーパ状に加工され、薄肉部６６となっている。
なお、金属箔２、金属板３、電極芯棒４、外部リード棒５、外部リード棒保持用筒体７は、第１の実施形態と同様の構造を有するものであり、説明を省略する。 Subsequently, a second embodiment of the present invention will be described. FIG. 4 is an enlarged sectional view showing the discharge lamp of the present invention.
Unlike the discharge lamp of the first embodiment, the glass member 1 shown in FIG. 4 has a tapered outer peripheral surface 14 that is tapered at a portion following the tip surface 11, and the tip surface 11 side is configured in a truncated cone shape. Yes. In addition, the holding cylinder 6 has an inclined surface 68 formed so that the arc tube side gradually becomes larger in diameter after the rear end portion 61 on the glass member 1 side. However, the tip 62 is formed so as to have a smaller diameter, as in the first embodiment. The holding cylinder 6 is composed of a cylindrical small-diameter portion 64 following the front end portion 62, a large-diameter portion 63 following the rear-end portion 61, and a tapered portion 65 connecting the small-diameter portion 64 and the large-diameter portion 63. The distal end portion 62 is processed into a taper shape to form a thin portion 66.
The metal foil 2, the metal plate 3, the electrode core bar 4, the external lead bar 5, and the external lead bar holding cylinder 7 have the same structure as that of the first embodiment, and a description thereof will be omitted.

上記のように構成された封着用導電部Ｍを封体８の側管８１に封止する手順は、封体８を軸方向水平となるように設置し、側管８１に封着用導電部Ｍを電極９が発光管８２内に位置するよう挿入配置し、そして、この封着用導電部Ｍが挿入配置された側管８１を、側管８１の外部からバーナー等を用いて加熱処理して、側管８１の内周と保持用筒体６、および、側管８１の内周とガラス部材１の外周とを金属箔２を介して気密に溶着させる。しかしながら、封着用導電部Ｍは、後端側の重量に比較して電極９の重量が大きいため、側管８１内に挿入されると、後端側と電極側とのバランスがとれず、側管８１の軸方向に対して電極側が径方向下方に傾いた状態で配置されることになる。   The procedure for sealing the sealing conductive portion M configured as described above to the side tube 81 of the envelope 8 is to install the seal 8 so as to be horizontal in the axial direction, and to seal the conductive portion M to the side tube 81. The electrode 9 is inserted and arranged so that it is located in the arc tube 82, and the side tube 81 in which the sealing conductive portion M is inserted and arranged is heated from the outside of the side tube 81 using a burner or the like, The inner periphery of the side tube 81 and the holding cylinder 6 and the inner periphery of the side tube 81 and the outer periphery of the glass member 1 are hermetically welded via the metal foil 2. However, since the conductive portion M for sealing has a larger weight of the electrode 9 than the weight of the rear end side, when inserted into the side tube 81, the rear end side and the electrode side cannot be balanced, and the side The electrode side is disposed in a state where the electrode side is inclined downward in the radial direction with respect to the axial direction of the tube 81.

図５は、保持用筒体６の形状に必要となる条件を説明するための図面である。
封着用導電部Ｍは、側管８１内で軸方向に対して電極側が径方向下方に傾くと、電極側では保持用筒体６の大径部６３の先端側部６３１が側管８１に当接するように構成されている。このとき、封着用導電部Ｍの後端側が側管８１に当接する状態は、２通りある。すなわち、外部リード棒保持用筒体７の後端面７１の側部７２が側管８１に当接する場合（図５（ａ））と、保持用筒体６の傾斜面６８と大径部６３の胴部との変傾点６３２が側管８１に当接する場合（図５（ｂ））である。 FIG. 5 is a drawing for explaining conditions necessary for the shape of the holding cylinder 6.
When the electrode side in the side tube 81 is inclined radially downward with respect to the axial direction in the side tube 81, the distal end side portion 631 of the large-diameter portion 63 of the holding cylinder 6 contacts the side tube 81 on the electrode side. It is configured to touch. At this time, there are two states in which the rear end side of the sealing conductive portion M contacts the side tube 81. That is, when the side portion 72 of the rear end surface 71 of the external lead rod holding cylinder 7 is in contact with the side tube 81 (FIG. 5A), the inclined surface 68 of the holding cylinder 6 and the large diameter portion 63. This is a case where the inclining point 632 with the body portion abuts on the side tube 81 (FIG. 5B).

外部リード棒保持用筒体７の後端面７１の側部７２が側管８１に当接する場合は、図５（ａ）に示すように、第１の実施の形態と同様に、Ｄ１を保持用筒体６の小径部６４の直径、Ｄ２を大径部６３の直径、Ｌ１を小径部６４からテーパ部６５までの軸方向の長さ、Ｌ２を保持用筒体６の大径部６３からガラス部材１、外部リード棒保持用筒体７までの軸方向の長さとして、
Ｄ２−Ｄ１＜６Ｌ１／Ｌ２
が成り立つように保持用筒体６を形成する。
また、保持用筒体６の傾斜面６８と大径部６３の胴部との変傾点６３２が側管８１に当接する場合は、図５（ｂ）に示すように、Ｌ２を保持用筒体６の大径部６３の先端側部６３１から変傾点６３２まで長さ、他のパラメータは図５（ａ）と同様として、
Ｄ２−Ｄ１＜６Ｌ１／Ｌ２
が成り立つように保持用筒体６を形成する。 When the side portion 72 of the rear end surface 71 of the external lead bar holding cylinder 7 is in contact with the side tube 81, as shown in FIG. 5A, D1 is held as in the first embodiment. The diameter of the small diameter portion 64 of the cylinder 6 for use, D 2 is the diameter of the large diameter portion 63, L 1 is the axial length from the small diameter portion 64 to the taper portion 65, and L 2 is the large diameter of the holding cylinder 6. As the axial length from the part 63 to the glass member 1 and the external lead rod holding cylinder 7,
D 2 -D 1 <6L 1 / L 2
The holding cylinder 6 is formed so that the following holds.
Also, if the variable傾点632 between the inclined surface 68 and the body portion of the large diameter portion 63 of the cylindrical retaining member 6 abuts against the side tube 81, as shown in FIG. 5 (b), holding the L 2 The length from the distal end side portion 631 of the large diameter portion 63 of the cylindrical body 6 to the inclining point 632 and other parameters are the same as in FIG.
D 2 -D 1 <6L 1 / L 2
The holding cylinder 6 is formed so that the following holds.

このように保持用筒体６は、発光管側の小径部６４と、ガラス部材側の大径部６３と、小径部６４と大径部６３をつなぐテーパ部６５からなるように構成されるので、側管８１内で封着用導電部Ｍが軸方向に対して電極側が径方向下方に傾いたときに、保持用筒体６の大径部６３の先端側部６３１が側管８１に当接するように構成できる。大径部６３とテーパ部６５の接続面は、９０°以上の鈍角となるように形成されている上に、先端部６２のようにテーパ状に加工された薄肉部６６とはなっていないので、大径部６３の先端側部６３１が側管８１と当接して荷重がかかっても欠ける恐れがない。これより、点灯時に保持用筒体６の欠けから亀裂が入り放電ランプが破裂することもなく、欠けた破片によって封体８に傷がついて、点灯中に放電ランプが破裂することもない。   As described above, the holding cylinder 6 is configured to include the small-diameter portion 64 on the arc tube side, the large-diameter portion 63 on the glass member side, and the tapered portion 65 that connects the small-diameter portion 64 and the large-diameter portion 63. In the side tube 81, the tip side portion 631 of the large-diameter portion 63 of the holding cylinder 6 abuts the side tube 81 when the sealing conductive portion M is inclined radially downward with respect to the axial direction. It can be configured as follows. The connecting surface of the large diameter portion 63 and the tapered portion 65 is formed to have an obtuse angle of 90 ° or more, and is not a thin portion 66 processed into a tapered shape like the tip portion 62. Even if the distal end side portion 631 of the large diameter portion 63 abuts on the side tube 81 and a load is applied, there is no fear of chipping. As a result, the holding cylinder 6 is not cracked at the time of lighting, and the discharge lamp does not rupture, and the broken piece does not damage the sealing body 8, and the discharge lamp does not rupture during lighting.

また、本発明の第２の実施形態のように、保持用筒体６より発光管側の側管８１の径を小さくし、かつ金属板３の周辺の側管８１の径を小さくすることによって、放電ランプの耐圧強度を高めることができる。
これは以下のような理由によると考えられる。半径ｒの側管８１の内部にかかる圧力は、その断面積（πｒ２）に比例する。この加えられる圧力に対し、封体８が破損しないようにする耐圧力は、側管８１の周長さ（４πｒ）に比例する。このため、側管８１は、径が小さいほど耐圧強度が増す。
図４に示すように、発光管８２は略球状に形成されているので、耐圧強度が高くなっている。よって、側管８１の径の大きさによって、封体８の耐圧強度が決まる。側管８１の内部には、電極芯棒４の外周と保持用筒体６の内孔６７との隙間を伝って金属板３まで封入ガスが及ぶので、耐圧強度に対しては、側管８１の発光管側から金属板３までを考慮すれば良い。 Further, as in the second embodiment of the present invention, by reducing the diameter of the side tube 81 on the arc tube side from the holding cylinder 6 and reducing the diameter of the side tube 81 around the metal plate 3. The pressure strength of the discharge lamp can be increased.
This is considered to be due to the following reasons. The pressure applied to the inside of the side tube 81 having the radius r is proportional to the cross-sectional area (πr 2 ). With respect to this applied pressure, the pressure resistance that prevents the envelope 8 from being damaged is proportional to the peripheral length (4πr) of the side tube 81. For this reason, the pressure resistance of the side tube 81 increases as the diameter decreases.
As shown in FIG. 4, since the arc tube 82 is formed in a substantially spherical shape, the pressure resistance strength is high. Therefore, the pressure resistance of the envelope 8 is determined by the diameter of the side tube 81. Inside the side tube 81, the sealed gas reaches the metal plate 3 through a gap between the outer periphery of the electrode core rod 4 and the inner hole 67 of the holding cylinder 6. From the arc tube side to the metal plate 3 may be considered.

保持用筒体６と側管８１は気密に封着されるので、封入ガスは、側管８１の保持用筒体６より発光管側、保持用筒体６の内孔６７、金属板３の周辺に存在する。保持用筒体６の内孔６７の径は明らかに他より小さいので、耐圧強度を決めるのは、側管８１の保持用筒体６より発光管側の外径の大きさや、金属板３の外径の大きさとなる。第２の実施形態では、ガラス部材１は発光管側の先端面１１に続く部分に先細りのテーパ状の外周面１４を有し、金属板３の周辺が縮径されている。保持用筒体６は、ガラス部材１側の後端部６１に続いて発光管側が次第に大径となる傾斜面６８が形成されるが、テーパ部６５を経て小径部６４となることによって、先端部６２は縮径されている。これより、側管８１の保持用筒体６より発光管側の外径を小さくすることができる。   Since the holding cylinder 6 and the side tube 81 are hermetically sealed, the sealed gas flows from the holding tube 6 of the side tube 81 to the arc tube side, the inner hole 67 of the holding tube 6, and the metal plate 3. Present in the vicinity. Since the diameter of the inner hole 67 of the holding cylinder 6 is obviously smaller than that of others, the pressure resistance is determined by the size of the outer diameter of the side tube 81 on the side of the arc tube from the holding cylinder 6 and the metal plate 3. The size of the outer diameter. In the second embodiment, the glass member 1 has a tapered outer peripheral surface 14 which is tapered at a portion following the distal end surface 11 on the arc tube side, and the periphery of the metal plate 3 is reduced in diameter. The holding cylinder 6 is formed with an inclined surface 68 having a gradually increasing diameter on the arc tube side following the rear end portion 61 on the glass member 1 side. The part 62 is reduced in diameter. Thus, the outer diameter on the arc tube side can be made smaller than the holding cylinder 6 of the side tube 81.

続いて、本発明の第３の実施形態について説明する。図６は、本発明の放電ランプを示す拡大断面図である。
図６に示す放電ランプは、第２の実施形態の放電ランプにおいて、保持用筒体６の後端部６１がテーパ状に加工され、その内径がガラス部材１の先端面１１の外径より大きく、保持用筒体６の後端がガラス部材１の先端を覆うように形成されているものである。保持用筒体６の後端部６１はすり鉢状に加工され、底部は金属板３の外径よりわずかに大きい円状となっており、側管８１の外端側に向かって次第に広がるテーパ状に形成されている。 Subsequently, a third embodiment of the present invention will be described. FIG. 6 is an enlarged sectional view showing a discharge lamp of the present invention.
The discharge lamp shown in FIG. 6 is the discharge lamp of the second embodiment. The rear end portion 61 of the holding cylinder 6 is processed into a tapered shape, and the inner diameter thereof is larger than the outer diameter of the front end surface 11 of the glass member 1. The rear end of the holding cylinder 6 is formed so as to cover the front end of the glass member 1. The rear end portion 61 of the holding cylinder 6 is processed into a mortar shape, and the bottom portion has a circular shape slightly larger than the outer diameter of the metal plate 3, and is gradually tapered toward the outer end side of the side tube 81. Is formed.

このように、保持用筒体６の後端部６１が、ガラス部材１の先端に係合するように加工され、金属箔２を外周に配置したガラス部材１の先端を覆うように形成されると、金属板３がより強固に固定され、金属箔２が引っ張られにくくなるので、切れにくくなる。
保持用筒体６の後端が、ガラス部材１の先端を覆うように形成されない場合は、金属板３の固定は強いものではない。そのため、電極９が非常に重いものを用いる場合には、金属板３は、電極９の自重のために、側管８１の軸方向に対して径方向下方に傾く。金属板３の中心から軸方向上側に接続された金属箔２は伸びるように引っ張られて切れ、金属板３の中心から軸方向下側に接続された金属箔２にはしわができることが考えられる。 Thus, the rear end portion 61 of the holding cylinder 6 is processed so as to engage with the tip of the glass member 1 and is formed so as to cover the tip of the glass member 1 with the metal foil 2 disposed on the outer periphery. Then, the metal plate 3 is more firmly fixed, and the metal foil 2 is less likely to be pulled.
When the rear end of the holding cylinder 6 is not formed so as to cover the front end of the glass member 1, the metal plate 3 is not firmly fixed. Therefore, when an extremely heavy electrode 9 is used, the metal plate 3 is inclined downward in the radial direction with respect to the axial direction of the side tube 81 due to its own weight. It is conceivable that the metal foil 2 connected to the upper side in the axial direction from the center of the metal plate 3 is pulled so as to extend, and the metal foil 2 connected to the lower side in the axial direction from the center of the metal plate 3 can be wrinkled. .

保持用筒体６は、Ｄ１を小径部６４の直径、Ｄ２を大径部６３の直径、Ｌ１を小径部６４からテーパ部６５までの軸方向の長さ、Ｌ２を保持用筒体６の大径部６３からガラス部材１、外部リード棒保持用筒体７までの軸方向の長さとして、Ｄ２−Ｄ１＜６Ｌ１／Ｌ２が成り立つように形成される。このように、保持用筒体６は、発光管側の小径部６４と、ガラス部材側の大径部６３と、小径部６４と大径部６３をつなぐテーパ部６５からなるように構成されるので、側管８１内で封着用導電部Ｍが軸方向に対して電極側が径方向下方に傾いたときに、保持用筒体６の大径部６３の先端側部６３１が側管８１に当接するように構成することができる。大径部６３とテーパ部６５の接続面は、９０°以上の鈍角となるように形成されている上に、先端部６２のようにテーパ状に加工された薄肉部６６にはなっていないので、大径部６３の先端側部６３１が側管８１と当接して荷重がかかっても欠ける恐れがない。これより、点灯時に保持用筒体６の欠けから亀裂が入り放電ランプが破裂することもなく、欠けた破片によって封体８に傷がついて、点灯中に放電ランプが破裂することもない。 Cylindrical retaining member 6, the diameter of the small-diameter portion 64 of the D 1, the D 2 diameter of the large-diameter portion 63, the axial length of the L 1 from the small-diameter portion 64 to tapered portion 65, tube holding the L 2 The length in the axial direction from the large-diameter portion 63 of the body 6 to the glass member 1 and the external lead rod holding cylinder 7 is formed so that D 2 −D 1 <6L 1 / L 2 holds. As described above, the holding cylinder 6 is configured to include the small-diameter portion 64 on the arc tube side, the large-diameter portion 63 on the glass member side, and the tapered portion 65 that connects the small-diameter portion 64 and the large-diameter portion 63. Therefore, when the conductive portion M to be sealed in the side tube 81 is inclined downward in the radial direction with respect to the axial direction, the distal end side portion 631 of the large diameter portion 63 of the holding cylinder 6 contacts the side tube 81. It can be configured to touch. Since the connecting surface of the large diameter portion 63 and the tapered portion 65 is formed to have an obtuse angle of 90 ° or more, it is not a thin portion 66 processed into a tapered shape like the tip portion 62. Even if the distal end side portion 631 of the large diameter portion 63 abuts on the side tube 81 and a load is applied, there is no fear of chipping. As a result, the holding cylinder 6 is not cracked at the time of lighting, and the discharge lamp does not rupture, and the broken piece does not damage the sealing body 8, and the discharge lamp does not rupture during lighting.

また、保持用筒体６は、ガラス部材１側の後端部６１に続いて大径部６３が形成されるが、テーパ部６５を経て小径部６４となるように形成することによって、先端部６２は縮径されている。これより、側管８１の保持用筒体６より発光管側の外径を小さくすることができ、放電ランプの耐圧強度を高めることができる。   Further, the holding cylinder 6 is formed with a large-diameter portion 63 following the rear end portion 61 on the glass member 1 side, but by forming the small-diameter portion 64 through the tapered portion 65, the tip portion 62 is reduced in diameter. As a result, the outer diameter on the arc tube side of the holding tube 6 of the side tube 81 can be made smaller, and the pressure resistance of the discharge lamp can be increased.

本発明の放電ランプを示す説明用断面図Cross-sectional view for explaining a discharge lamp of the present invention 本発明の放電ランプを示す拡大断面図The expanded sectional view which shows the discharge lamp of this invention 本発明の保持用筒体の形状を示す説明用図面The explanatory drawing which shows the shape of the cylinder for holding of this invention 本発明の放電ランプを示す拡大断面図The expanded sectional view which shows the discharge lamp of this invention 本発明の保持用筒体の形状を示す説明用図面The explanatory drawing which shows the shape of the cylinder for holding of the present invention 本発明の放電ランプを示す拡大断面図The expanded sectional view which shows the discharge lamp of this invention 従来の放電ランプを示す説明用断面図Cross-sectional view for explaining a conventional discharge lamp 従来の放電ランプを示す拡大断面図Expanded sectional view showing a conventional discharge lamp

符号の説明Explanation of symbols

１ ガラス部材
１１ 先端面
１２ 後端面
１３ 孔
１４ テーパ状の外周面
２ 金属箔
２１ 先端部
２２ 後端部
３ 金属板
４ 電極芯棒
５ 外部リード棒
５１ 金属部材
６ 保持用筒体
６１ 後端部
６２ 先端部
６３ 大径部
６３１ 側部
６４ 小径部
６５ テーパ部
６６ 薄肉部
６７ 内孔
６８ 傾斜面
７ 外部リード棒保持用筒体
７１ 後端面
７２ 側部
８ 封体
８１ 側管
８２ 発光管
９ 電極
DESCRIPTION OF SYMBOLS 1 Glass member 11 Front end surface 12 Rear end surface 13 Hole 14 Tapered outer peripheral surface 2 Metal foil 21 Front end portion 22 Rear end portion 3 Metal plate 4 Electrode core rod 5 External lead rod 51 Metal member 6 Holding cylinder 61 Rear end portion 62 Tip portion 63 Large diameter portion 631 Side portion 64 Small diameter portion 65 Tapered portion 66 Thin wall portion 67 Inner hole 68 Inclined surface 7 External lead rod holding cylinder 71 Rear end surface 72 Side portion 8 Sealing body 81 Side tube 82 Light emitting tube 9 Electrode

Claims (2)

発光管の両端に側管が設けられた封体と、前記側管の内部に配置されたガラス部材と、前記ガラス部材の外周に沿って配置された金属箔と、前記側管から前記発光管の内部に伸びるように配置された電極芯棒と、前記電極芯棒の先端に設けられた電極と、前記電極芯棒の外周と前記側管の内周との間に配置され、発光管側の先端部がテーパ状に加工された保持用筒体とを備えた放電ランプにおいて、
前記保持用筒体は、発光管側の小径部と、ガラス部材側の大径部と、小径部と大径部をつなぐテーパ部からなることを特徴とする放電ランプ。 An envelope having side tubes provided at both ends of the arc tube, a glass member disposed inside the side tube, a metal foil disposed along an outer periphery of the glass member, and the arc tube from the side tube An electrode core rod arranged to extend inside, an electrode provided at the tip of the electrode core rod, and an arc tube side disposed between the outer periphery of the electrode core rod and the inner periphery of the side tube In a discharge lamp comprising a holding cylinder whose tip is processed into a tapered shape,
The holding cylinder includes a small-diameter portion on the arc tube side, a large-diameter portion on the glass member side, and a tapered portion connecting the small-diameter portion and the large-diameter portion. 前記保持用筒体は、ガラス部材側の後端部がテーパ状に加工され、その内径がガラス部材の発光管側の先端面の外径より大きく、ガラス部材を覆うように形成されていることを特徴とする放電ランプ。


The holding cylinder is formed so that the rear end portion of the glass member side is processed into a taper shape, the inner diameter thereof is larger than the outer diameter of the distal end surface of the glass member on the arc tube side, and the glass member is covered. Discharge lamp characterized by.


JP2006107173A 2006-04-10 2006-04-10 Discharge lamp Active JP4487969B2 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009224028A (en) * 2008-03-13 2009-10-01 Orc Mfg Co Ltd Seal portion structure of short-arc discharge lamp
JP2009230994A (en) * 2008-03-21 2009-10-08 Orc Mfg Co Ltd Discharge lamp equipped with sealing structure
JP2009238671A (en) * 2008-03-28 2009-10-15 Orc Mfg Co Ltd Short arc type discharge lamp
DE102008064056A1 (en) * 2008-12-19 2010-07-01 Osram Gesellschaft mit beschränkter Haftung Cable feedthrough with foil connection

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0380666U (en) * 1989-12-05 1991-08-19
JPH0877975A (en) * 1994-08-31 1996-03-22 Ushio Inc Discharge lamp
JPH08273616A (en) * 1995-03-31 1996-10-18 Toto Ltd Sealing part structure of aperture part of metal vapor light emitting tube
DE19825004A1 (en) * 1998-04-24 1999-10-28 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh High pressure discharge lamp
DE20005531U1 (en) 2000-03-29 2000-06-21 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Short arc lamp

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009224028A (en) * 2008-03-13 2009-10-01 Orc Mfg Co Ltd Seal portion structure of short-arc discharge lamp
JP2009230994A (en) * 2008-03-21 2009-10-08 Orc Mfg Co Ltd Discharge lamp equipped with sealing structure
JP2009238671A (en) * 2008-03-28 2009-10-15 Orc Mfg Co Ltd Short arc type discharge lamp
DE102008064056A1 (en) * 2008-12-19 2010-07-01 Osram Gesellschaft mit beschränkter Haftung Cable feedthrough with foil connection

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TWI354313B (en) 2011-12-11

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