EP2919257B1 - Entladungslampe und verfahren zur herstellung derselben - Google Patents

Entladungslampe und verfahren zur herstellung derselben Download PDF

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Publication number
EP2919257B1
EP2919257B1 EP13852720.5A EP13852720A EP2919257B1 EP 2919257 B1 EP2919257 B1 EP 2919257B1 EP 13852720 A EP13852720 A EP 13852720A EP 2919257 B1 EP2919257 B1 EP 2919257B1
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EP
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Prior art keywords
electrode
metal foil
welding
discharge lamp
ratio
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English (en)
French (fr)
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EP2919257A4 (de
EP2919257A1 (de
Inventor
Jun Yamada
Osamu Shirakawa
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Toshiba Lighting and Technology Corp
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Toshiba Lighting and Technology Corp
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr
    • H01J61/827—Metal halide arc lamps
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/48—Means forming part of the tube or lamp for the purpose of supporting it
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
    • H01J61/366—Seals for leading-in conductors
    • H01J61/368—Pinched seals or analogous seals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
    • H01J9/28—Manufacture of leading-in conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
    • H01J9/32—Sealing leading-in conductors
    • H01J9/323—Sealing leading-in conductors into a discharge lamp or a gas-filled discharge device
    • H01J9/326—Sealing leading-in conductors into a discharge lamp or a gas-filled discharge device making pinched-stem or analogous seals

Definitions

  • Embodiments described herein relate to a discharge lamp and a manufacturing method for the discharge lamp.
  • a discharge lamp is a lamp comprised of an electrode mount sealed by a seal section of an arc tube including the arc tube and the seal section.
  • the electrode mount is configured by a metal foil and an electrode.
  • the metal foil and the electrode can be welded by laser irradiation.
  • a deficiency of disjoining of the metal foil and the electrode occurs, and thus improvement in joining strength is demanded.
  • Documents US 2006/208640 A1 , DE 20 2010 001373 U1 and EP 2 442 352 A2 disclose elliptical welding marks between a thin foil and an electrode of a discharge lamp.
  • Document JP H06 190575 A discloses elliptical welding marks between aluminium alloy foils.
  • the present invention it is possible to provide a discharge lamp excellent in joining strength and a manufacturing method for the discharge lamp.
  • a discharge lamp includes a light-emitting section, a seal section, and an electrode mount.
  • the light-emitting section includes a discharge space in which metal halide is encapsulated.
  • the seal section is formed at an end portion of the light-emitting section.
  • the electrode mount includes a metal foil including first and second surfaces located on the front and the back and an electrode connected to the metal foil.
  • a welding mark is formed such that the first surface and at least a part of the electrode overlap each other. The welding mark has an elliptical shape long in the axial direction of the electrode when viewed from the second surface side.
  • a ratio L1/L2 of a first length L1 in the axial direction and a second length L2 in a direction orthogonal to the axial direction is in a relation of 1.08 ⁇ L1/L2 ⁇ 1.56.
  • a discharge lamp according to an embodiment explained below includes a light-emitting section 11, seal sections 12, and electrode mounts 3.
  • the light-emitting section 11 includes a discharge space 111 in which metal halide is encapsulated.
  • the seal sections 12 are formed at end portions of the light-emitting section 11.
  • the electrode mounts 3 include metal foils 31 including first surfaces 311 and second surfaces 312 located in the front and the back and electrodes 32 connected to the metal foils 31. Welding marks 36 are formed such that at least parts of the first surfaces 311 and the electrodes 32 overlap each other.
  • the welding marks 36 have an elliptical shape long in the axial direction of the electrodes 32 when viewed from the second surfaces 312 side.
  • a ratio L1/L2 of a first length L1 in the axial direction and a second length L2 in a direction orthogonal to the axial direction is in a relation of 1.08 ⁇ L1/L2 ⁇ 1.56.
  • a ratio L2/W of the second length L2 and a diameter W of the electrodes 32 is in a relation of 0.3 ⁇ L2/W ⁇ 0.9.
  • the diameter W of the electrodes 32 is 0.2 mm to 0.4 mm.
  • the welding marks 36 are formed to extend from the metal foils 31 side to the insides of the electrodes 32.
  • the center lines of the welding marks 36 incline with respect to the perpendicular direction of the second surfaces 312.
  • the metal foils 31 and the electrodes 32 are arranged such that at least parts of the first surfaces 311 and the electrodes 32 overlap each other.
  • a laser is irradiated on overlapping portions of the first surfaces 311 and the electrodes 32 from the second surfaces 312 side along an optical axis inclining with respect to the perpendicular direction of the metal foils 31 to weld the metal foils 31 and the electrodes 32 to form the welding marks 36 in which the ratio L1/L2 of the first length L1 in the axial direction of the electrodes 32 and the second length L2 in the direction orthogonal to the axial direction is in a relation of 1.08 ⁇ L1/L2 ⁇ 1.56.
  • FIG. 1 is a diagram showing a discharge lamp in the first embodiment.
  • FIG. 2 is a sectional view showing the discharge lamp in the first embodiment.
  • FIG. 3 is a diagram showing a state in which the metal foil of the discharge lamp in the first embodiment is viewed from the second surface side.
  • the discharge lamp in this embodiment is a metal halide lamp used in a head lamp for an automobile headlight.
  • the discharge lamp includes an inner tube 1 as an airtight container.
  • the inner tube 1 has an elongated shape.
  • the light-emitting section 11 having a substantially elliptical shape is formed around the center of the inner tube 1.
  • Tabular seal sections 12 formed by pinch seal are formed at both the ends of the light-emitting section 11.
  • Cylinder sections 14 are continuously formed at both the ends of the seal sections 12 by an intercalate section 13.
  • the inner tube 1 is desirably formed of a material having heat resistance and translucency such as quartz glass.
  • the seal sections 12 may be formed by shrink seal to be formed in a columnar shape.
  • the discharge space 111 On the inside of the light-emitting section 11, the discharge space 111 having a substantially columnar shape in the center and having a taper shape toward both the ends is formed.
  • Metal halide 2 and a rare gas are encapsulated in the discharge space 111.
  • the metal halide 2 is formed of sodium iodide, scandium iodide, zinc iodide, and indium bromide. Note that the metal halide 2 is not limited to this combination. For example, halide of tin and cesium may be added.
  • the rare gas xenon is used.
  • the pressure of the rare gas is 12 atm to 18 atm and desirably 13 atm to 16 atm.
  • a mixed gas obtained by combining xenon and neon, argon, krypton, or the like can also be used.
  • the lamp in this embodiment is a mercury-free discharge lamp.
  • the "mercury-free" means that the lamp does not substantially include mercury.
  • the electrode mounts 3 are respectively sealed by the seal sections 12 formed on both the sides of the light-emitting section 11.
  • the electrode mounts 3 are configured by the metal foils 31, the electrodes 32, coils 33, and lead wires 34.
  • the metal foil 31 is a thin plate-like member made of, for example, molybdenum.
  • the metal foil 31 includes the flat first surface 311 and the flat second surface 312 on the front and the back. Both the ends in the latitudinal direction of the flat surfaces are formed in a knife edge shape gradually reduced in thickness.
  • rough surfaces 313 are formed on half surfaces (excluding overlapping portions of the ends and the electrodes 32) of the first surface 311 and the second surface 312 on a side to which the electrodes 32 are connected.
  • FIG. 4 is an enlarged view showing a range A shown in FIG. 3 .
  • the rough surface 313 is formed from a plurality of circular recesses 3131.
  • the recesses 3131 are, for example, non-penetrating semicircular hollows having a diameter of 18 ⁇ and depth of 3 ⁇ m.
  • the recesses 3131 can be formed by irradiating a YAG laser.
  • the electrodes 32 are bar-like members made of so-called thoriated tungsten obtained by, for example, doping thorium oxide in tungsten.
  • One ends of the electrodes 32 are connected to end portions on the light-emitting section 11 side of the metal foils 31.
  • the other ends of the electrodes 32 project into the discharge space 111, and the distal end portions of the other ends of the electrodes 32 are opposed to each other while keeping a predetermined distance.
  • the diameter W is 0.2 mm to 0.4 mm. If the diameter W is smaller than 0.2 mm, the temperature of the electrodes 32 during lighting rises and scattering (spattering) of an electrode substance to the discharge space 111 increases.
  • the diameter W exceeds 0.4 mm, distortion (stress) of sealing portions of the inner tube 1 and the electrodes 32 increases. Therefore, it is likely that a crack occurs in the inner tube 1 during discharge lamp manufacturing or during lighting to cause non-lighting.
  • the diameter W is, for example, 0.38 mm.
  • the electrodes 32 are preferably positioned in a range in which the distance between the distal ends of the electrodes 32 is 3.7 mm to 4.4 mm when observed through an outer tube 5.
  • the coils 33 are metal wires made of, for example, doped tungsten.
  • the coils 33 are wound in a spiral shape around the axes of shaft sections of the electrodes 32 sealed by the seal sections 12.
  • the lead wires 34 are metal wires made of, for example, molybdenum. One end of the lead wires 34 is connected to the end portions of the metal foils 31 on the opposite side of the electrode connection side from the light-emitting section 11. The other end is extended substantially in parallel to a tube axis to the outside of the inner tube 1. One end of an L-shaped support wire 35 made of, for example, nickel is connected to, by laser welding, the lead wire 34 extended to the front end side of the lamp, that is, a far side from a socket 6. In the support wire 35, a sleeve 4 made of, for example, ceramic is attached to a part extending in parallel to the inner tube 1.
  • the cylindrical outer tube 5 is provided substantially concentrically with the inner tube 1 to cover the light-emitting section 11. Connection of the inner and outer tubes is performed by welding the ends of the outer tube 5 near the cylinder section 14 of the inner tube 1.
  • Gas is encapsulated in a closed space 51 formed between the inner tube 1 and the outer tube 5.
  • dielectric barrier dischargeable gas for example, one kind of gas selected from neon, argon, xenon, and nitrogen or mixed gas thereof can be used.
  • the pressure of the gas is desirably 0.3 atm or less, in particular, 0.1 atm or less.
  • the outer tube 5 is desirably formed of a material having a coefficient of thermal expansion close to the coefficient of thermal expansion of the inner tube 1 and having ultraviolet blocking properties.
  • quartz glass added with oxide of titanium, cerium, aluminum, or the like can be used.
  • the socket 6 is connected to one end of the inner tube 1 to which the outer tube 5 is connected.
  • the connection is performed by attaching a metal band 71 to the outer circumferential surface of the outer tube 5 and gripping the metal band 71 with four metal tongue pieces 72 formed to be projected from the socket 6.
  • a bottom terminal 81 is formed in the bottom of the socket 6 and a side terminal 82 is formed on a side of the socket 6.
  • the lead wire 34 and the support wire 35 are respectively connected to the bottom terminal 81 and the side terminal 82.
  • the discharge lamp (a foil seal lamp) configured as explained above is connected to a lighting circuit (not shown in the figure) to set the bottom terminal 81 on a high voltage side and set the side terminal 82 on a low voltage side.
  • the discharge lamp is lit at lamp power of 75 W during a start and 35 W during stable lighting.
  • FIGS. 5A and 5B are sectional views showing the electrode mount in the first embodiment. As shown in FIGS. 5A and 5B , in an overlapping portion by the welding, the welding marks 36 extending from the metal foil 31 side to the inside of the electrode 32 and recesses 37 are respectively formed in welded parts. The welding marks 36 are formed in a substantially elliptical cone shape. When viewed from the second surface 312 side, as shown in FIG.
  • the welding marks 36 are formed in an elliptical shape long in the axial direction of the electrode 32.
  • the first length L1 in the axial direction only has to be larger than the second length L2 in the direction orthogonal to the axial direction and a contour line only has to be formed of a curved line.
  • the elliptical shape includes a substantially elliptical shape.
  • the ratio L1/L2 of the first length L1 and the second length L2 is in a relation of Expression (1) below. 1.08 ⁇ L 1 / L 2 ⁇ 1.56
  • FIG. 6 is a diagram showing a relation between a disjoining occurrence ratio and L1/L2 of the discharge lamp in the first embodiment.
  • the disjoining occurrence ratio (%) greatly changes if the ratio L1/L2 of the welding marks 36 is between 1.00 and 1.08. If the ratio L1/L2 of the welding marks 36 is 1.00 or less (the shape of the welding marks 36 viewed from the second surface 312 side is a circular shape or an elliptical shape long in the direction orthogonal to the axial direction of the electrode 32), compared with if the ratio L1/L2 is 1.08, the disjoining occurrence ratio suddenly increases (in the figure, about nine times).
  • the ratio L1/L2 of the welding marks 36 is set to 1.08 or more, it is possible to markedly suppress disjoining compared with if the ratio L1/L2 is smaller than 1.00. Similarly, the disjoining occurrence ratio (%) greatly changes if the ratio L1/L2 of the welding marks 36 is between 1.56 and 1.64.
  • the ratio L1/L2 of the welding marks 36 is 1.64 or more (the shape of the welding marks 36 when viewed from the second surface 312 side is an elliptical shape considerably longer in the axial direction than in the direction orthogonal to the axial direction of the electrode 32), compared with if the ratio L1/L2 is 1.56 (the first length L1 is about 1.5 times as large as the second length L2), the disjoining occurrence ratio suddenly increases (in the figure, about six times). Therefore, by setting the ratio L1/L2 of the welding marks 36 to 1.56 or less, it is possible to markedly suppress disjoining compared with if the ratio L1/L2 is 1.64 or more.
  • the ratio L1/L2 is more preferably 1.16 to 1.48.
  • a ratio L2/W of the second length L2 and the diameter W of the electrode 32 is in a relation of Expression (2) below. If the ratio L2/W is smaller than 0.3, welding strength decreases and a defective rate of disjoining or the like increases. If the ratio L2/W exceeds 0.9, the electrode 32 and the metal foil 31 are welded in a state in which a gap occurs between the electrode 32 and the metal foil 31. Therefore, only the metal foil 31 is melted by heating during the welding and a defect such as perforation occurs.
  • the ratio L2/W is, for example, 0.66. 0.3 ⁇ L 2 / W ⁇ 0.9
  • the shape in cross sections of the welding marks 36 along the latitudinal direction of the metal foil 31 is, as shown in FIG. 5A , a substantially triangular shape, center lines B1-B1' and B2-B2' (lines passing near a vertex of the welding mark 36 located on the most inner side of the electrode 32 and dividing the area of the welding mark 36 substantially into two) of which are respectively substantially parallel (including parallel) to the perpendicular direction of the second surface 312.
  • the shape in cross sections of the welding marks 36 along the longitudinal direction of the metal foil 31 is, as shown in FIG. 5B , a substantially triangular shape, the center lines B1-B1' and B2-B2' of which are substantially parallel to the perpendicular direction of the second surface 312. That is, in this embodiment, inclination angles ⁇ 1 and ⁇ 2 of the center lines are, for example, 0°. Note that the metal foil 31 and the lead wire 34 have the same structure.
  • FIG. 7 is a diagram showing a manufacturing method for the electrode mount in the first embodiment.
  • FIGS. 8A and B are explanatory diagrams showing laser irradiation on the electrode mount in the first embodiment.
  • the electrode 32 and the lead wire 34 are arranged on a jig 91 to be fit in a groove 911.
  • the metal foil 31 is arranged such that the first surface 311 overlaps a part of the electrode 32 and a part of the lead wire 34.
  • pressing members 92 are arranged at four corners of the second surface 312 to fix the metal foil 31. As shown in FIGS.
  • a laser is irradiated on an overlapping portion of the metal foil 31 and the electrode 32 from the second surface 312 side by a laser irradiating unit 93 of a YAG laser irradiating apparatus.
  • the laser irradiating unit 93 irradiates the laser with optical axes D1-D1' and D2-D2' in welding parts (positions where the welding marks 36 are formed) set substantially parallel to the perpendicular direction of the second surface 312 when viewed from the longitudinal direction of the metal foil 31 as shown in FIG. 8A and set substantially parallel to the perpendicular direction of the second surface 312 when viewed from the latitudinal direction of the metal foil 31 as shown in FIG. 8B .
  • optical axis inclination angles ⁇ 1 and ⁇ 2 of the optical axes are, for example, 0°.
  • This laser irradiation process is performed a plurality of times, in this embodiment, twice with a position of the laser irradiation changed.
  • the two welding marks 36 are formed in the overlapping portion of the metal foil 31 and the electrode 32.
  • the laser irradiating unit 93 can change an irradiation range of the laser to not only a circular shape but also an elliptical shape.
  • the laser irradiating unit 93 irradiates the laser to the overlapping portion of the metal foil 31 and the electrode 32 from the second surface 312 side in an irradiation range in which the ratio L1/L2 of the welding marks 36 is in the relation of Expression 1 above.
  • FIGS. 9A and 9B are diagrams showing another example of the electrode mount.
  • the shape in the cross sections of the welding marks 36 along the latitudinal direction of the metal foil 31 is, as shown in FIG. 9A , a substantially triangular shape, the center lines B1-B1' and B2-B2' of which are respectively substantially perpendicular to the second surface 312.
  • the shape in the cross sections of the welding marks 36 along the longitudinal direction of the metal foil 31 is, as shown in FIG.
  • the laser is irradiated to be substantially orthogonal to the second surface 312 when viewed from the longitudinal direction of the metal foil 31 and incline with respect to the perpendicular direction of the second surface 312 when viewed from the latitudinal direction of the metal foil 31.
  • the optical axis inclination angles ⁇ 1 and ⁇ 2 of the optical axes are, for example, 35°. Note that, in order to further improve the joining strength, the optical axis inclination angles ⁇ 1 and ⁇ 2 are suitably 10° to 50°.
  • the optical axes D1-D1' and D2-D2' in the welding parts are determined such that the ratio L1/L2 is in the relation of Expression 1 above.
  • the shape of the welding marks 36 viewed from the second surface 312 side is the elliptical shape. Therefore, the size of the welding marks 36 increases compared with circular welding marks formed if the laser is perpendicularly irradiated on the second surface 312 (the conventional method). If the size increases, a contact area of the electrode 32 and the welding mark 36 increases. Therefore, it is possible to increase the joining strength of the metal foil 31 and the electrode 32.
  • the laser is irradiated on the overlapping portion of the metal foil 31 and the electrode 32 from the second surface 312 side in the state in which the laser is inclined with respect to the perpendicular direction of the second surface 312 to weld the metal foil 31 and the electrode 32. Consequently, it is possible to form, in the overlapping portion, the welding marks 36, the shape of which when viewed from the second surface 312 side is the elliptical shape and the center lines B1-B1' and B2-B2' of which incline with respect to the perpendicular direction of the second surface 312. Therefore, it is possible to increase the joining strength of the metal foil 31 and the electrode 32 without increasing the power of the laser.
  • the present invention is not limited to the embodiment. Various modifications are possible.
  • the material of the metal foil 31 is not limited to molybdenum.
  • the effect of the present invention can also be obtained if the metal foil 31 is formed of rhenium molybdenum, tungsten, rhenium tungsten, and the like.
  • the material is not particularly limited.
  • a thin film or a layer may be formed on the surface of the material.
  • the shape of the electrode 32 may be a stepped shape, the diameter of the distal end of which is larger than the diameter of the proximal end, a shape, the distal end of which is a spherical shape having size of the diameter, and a shape, one electrode diameter and the other electrode diameter of which are different.
  • the electrode material may be, for example, pure tungsten, doped tungsten obtained by doping a very small amount of aluminum, silicon, or potassium in tungsten, or rhenium tungsten obtained by doping rhenium in tungsten.
  • FIGS. 10A and 10B are diagrams showing another example of the electrode mount.
  • the shape in the cross sections of the welding marks 36 along the latitudinal direction of the metal foil 31 may be, as shown in FIG. 10A , a shape, the center lines B1-B1' and B2-B2' of which respectively incline with respect to the perpendicular direction of the second surface 312.
  • the shape in a cross section of a welding mark 361 along the longitudinal direction of the metal foil 31 may be a shape, the center line B1-B1' of which inclines to the light-emitting section 11 side with respect to the perpendicular direction of the second surface 312.
  • the shape in a cross section of a welding mark 362 along the longitudinal direction of the metal foil 31 may be a shape, the center line B2-B2' of which inclines to the lead wire 34 side with respect to the perpendicular direction of the second surface 312. In these shapes, since the welding marks 361 and 362 hold the electrode 32, it is possible to further suppress the disjoining.
  • the shape in the cross sections of the welding marks 36 along the latitudinal direction of the metal foil 31 may be a shape, the center lines B1-B1' and B2-B2' of which respectively incline to cross across the perpendicular direction of the second surface 312.
  • the inclination angles ⁇ 1 and ⁇ 2 may be different.

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Claims (5)

  1. Entladungslampe, umfassend:
    einen lichtemittierenden Abschnitt (11), der einen Entladungsraum aufweist, in dem Metallhalogenid eingekapselt ist;
    einen Dichtungsabschnitt (12), der an einem Endabschnitt des lichtemittierenden Abschnitts ausgebildet ist; und
    eine Elektrodenhalterung (3), die eine Metallfolie (31) mit einer ersten und zweiten Oberfläche, die sich auf einer Vorderseite und einer Rückseite befinden, und eine Elektrode (32), die mit der Metallfolie verbunden ist, aufweist, wobei
    eine Schweißmarke (36) derart ausgebildet ist, dass die erste Oberfläche und mindestens ein Teil der Elektrode einander überlappen,
    die Schweißmarke, von der Seite der zweiten Oberfläche gesehen, eine elliptische Form, lang in einer axialen Richtung der Elektrode, aufweist und
    ein Verhältnis L1/L2 einer ersten Länge L1 in der axialen Richtung und einer zweiten Länge L2 in einer Richtung rechtwinklig zu der axialen Richtung in einer Beziehung des nachstehenden Ausdrucks (1) steht. 1 , 8 ≤ L 1 / L 2 ≤ 1 , 56
    Figure imgb0006
  2. Lampe nach Anspruch 1, wobei
    ein Verhältnis L2/W zwischen der zweiten Länge L2 und einem Durchmesser W der Elektrode in einer Beziehung des nachstehenden Ausdrucks (2) steht. 0 , 3 ≤ L 2 / W ≤ 0 , 9
    Figure imgb0007
  3. Lampe nach Anspruch 1, wobei ein Durchmesser W der Elektrode 0,2 mm bis 0,4 mm beträgt.
  4. Lampe nach Anspruch 1, wobei die Schweißmarke dazu ausgebildet ist, sich von der Metallfolienseite zu einer Innenseite der Elektrode zu erstrecken, und eine Mittellinie der Schweißmarke bezogen auf eine rechtwinklige Richtung der zweiten Oberfläche geneigt ist.
  5. Herstellungsverfahren für eine Entladungslampe, aufweisend:
    einen lichtemittierenden Abschnitt, der einen Entladungsraum aufweist, in dem Metallhalogenid eingekapselt ist;
    einen Dichtungsabschnitt, der an einem Endabschnitt des lichtemittierenden Abschnitts ausgebildet ist; und
    eine Elektrodenhalterung, die eine Metallfolie mit einer ersten und zweiten Oberfläche, die sich auf einer Vorderseite und einer Rückseite befinden, und eine Elektrode, die mit der Metallfolie verbunden ist, aufweist,
    wobei das Herstellungsverfahren umfasst: Anordnen der Metallfolie und der Elektrode derart, dass die erste Oberfläche und mindestens ein Teil der Elektrode einander überlappen und danach Bestrahlen eines überlappenden Abschnitts der ersten Oberfläche und der Elektrode mit einem Laser von der Seite der zweiten Oberfläche her entlang einer optischen Achse, die bezogen auf eine rechtwinklige Richtung der Metallfolie geneigt ist, und Schweißen der Metallfolie und der Elektrode, um eine Schweißmarke auszubilden, wobei ein Verhältnis L1/L2 einer ersten Länge L1 in einer axialen Richtung der Elektrode und einer zweiten Länge L2 in einer Richtung rechtwinklig zu der axialen Richtung derselben in einer Beziehung des nachstehenden Ausdrucks (3) steht. 1 , 08 ≤ L 1 / L 2 ≤ 1 , 56
    Figure imgb0008
EP13852720.5A 2012-11-07 2013-08-09 Entladungslampe und verfahren zur herstellung derselben Active EP2919257B1 (de)

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JP2012245504A JP2014096215A (ja) 2012-11-07 2012-11-07 放電ランプおよびその製造方法
PCT/JP2013/071730 WO2014073253A1 (ja) 2012-11-07 2013-08-09 放電ランプおよびその製造方法

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EP2919257A1 EP2919257A1 (de) 2015-09-16
EP2919257A4 EP2919257A4 (de) 2016-06-15
EP2919257B1 true EP2919257B1 (de) 2017-04-05

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JP2004363014A (ja) 2003-06-06 2004-12-24 Nec Lighting Ltd 高圧放電ランプの製造方法
DE10336087A1 (de) * 2003-08-06 2005-03-03 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Elektrodensystem mit neuartiger Verbindung, zugehörige Lampe mit dieser Folie und Verfahren zur Herstellung der Verbindung
DE102004027806A1 (de) 2004-06-08 2006-01-05 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Verfahren zum Verschweißen einer Metallfolie mit einem zylindrischen Metallstift
JP4494224B2 (ja) * 2005-01-12 2010-06-30 ハリソン東芝ライティング株式会社 ランプ用封着体および放電ランプ
JP4681668B2 (ja) * 2007-04-05 2011-05-11 ハリソン東芝ライティング株式会社 箔シールランプ
US8339023B2 (en) 2007-12-12 2012-12-25 Harison Toshiba Lighting Corp. Discharge lamp
DE202010001373U1 (de) * 2010-01-26 2010-04-01 Osram Gesellschaft mit beschränkter Haftung Stromzuführungssystem für eine Elektrische Lampe und zugehörige Elektrische Lampe
JP2012084454A (ja) 2010-10-14 2012-04-26 Koito Mfg Co Ltd 放電バルブ用アークチューブ

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JP2014096215A (ja) 2014-05-22
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WO2014073253A1 (ja) 2014-05-15

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