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EP1911065B1 - Lampe électrique à ampoule externe - Google Patents

Lampe électrique à ampoule externe Download PDF

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Publication number
EP1911065B1
EP1911065B1 EP06762862.8A EP06762862A EP1911065B1 EP 1911065 B1 EP1911065 B1 EP 1911065B1 EP 06762862 A EP06762862 A EP 06762862A EP 1911065 B1 EP1911065 B1 EP 1911065B1
Authority
EP
European Patent Office
Prior art keywords
outer bulb
electrical lamp
narrowed
neck
parts
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP06762862.8A
Other languages
German (de)
English (en)
Other versions
EP1911065A2 (fr
Inventor
Thomas Bittmann
Jürgen Gräf
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ledvance GmbH
Original Assignee
Osram GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Osram GmbH filed Critical Osram GmbH
Publication of EP1911065A2 publication Critical patent/EP1911065A2/fr
Application granted granted Critical
Publication of EP1911065B1 publication Critical patent/EP1911065B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/34—Double-wall vessels or containers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/36—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
    • H01J9/245—Manufacture or joining of vessels, leading-in conductors or bases specially adapted for gas discharge tubes or lamps
    • H01J9/247—Manufacture or joining of vessels, leading-in conductors or bases specially adapted for gas discharge tubes or lamps specially adapted for gas-discharge lamps

Definitions

  • the invention relates to an electric lamp with an outer bulb according to the preamble of claim 1.
  • These are in particular metal halide lamps, high-pressure mercury discharge lamps, but also halogen lamps with outer bulb.
  • the inner bulb of the lamp is sealed on two sides with sealing parts.
  • a metal halide discharge lamp for automotive headlamps which has an inner piston and an outer bulb surrounding it, which is connected to the inner bulb via a glass bead.
  • a disadvantage of these joining techniques is that the film in the sealing part of the inner piston is very heavily loaded with temperature, which can lead to premature failure of the lamp.
  • the lamp according to the invention has a vacuum-sealed internal piston, in particular a discharge vessel, which defines a lamp axis, and to each other opposite ends is closed by sealing parts.
  • the sealing part is a pinch or meltdown.
  • the luminous means inside the lamp is a discharge arc between two electrodes or a luminous element. It is electrically connected to the leading to him internal power supply lines.
  • the sealing part is provided in particular with an outwardly projecting extension, which is formed as a hollow tube.
  • the thermal load should always be below about 350 ° C.
  • Known measures to achieve this are, for example, sufficiently long Folienquetschungen or greatly enlarged surface of the sealing parts made of glass.
  • An increase of the stated limit of 20 to 40 ° C can be achieved by an additional oxidation protection of the metallic components via coatings such as chromium or platinum.
  • the invention describes a special geometric design.
  • a gas-filled protective piston by tapering its usually tubular diameter at the ends so far over its length, so that the convection of hot technicallykolben spallgas over the length of the lateral sealing parts of the lamp is significantly hindered.
  • the inventive taper of the ends of the outer bulb the temperature gradient increases from the inside to the outside, so that the ends also become colder. This effect is also transmitted to the metallic current-carrying components of the lateral sealing parts of the lamp.
  • On the glass surfaces of the sealing parts better or faster temperature can be delivered to the colder mecanickolben spallgas and outer bulb glass. Thus, the temperature drops faster from the inside to the outside over the length of the sealing parts. This allows for lower temperatures at the end of the film or shorter film fusions / squeezes.
  • the outer bulb (14) has two narrowed neck portions (13 ) has at its ends and is slipped over the inner piston, and wherein at least one neck part (13) is fixed to a connecting portion (12) at the end of the sealing part of the inner piston, characterized in that there is a terminal portion (Z) of the sealing part, in the distance (D) between the neck part and the sealing part is at most 4 mm, preferably at most 2.5 mm, wherein this distance (D) towards the inner piston is at least as far adhered to, that the narrowed portion of the neck portion of a portion (Y) of the film enclosing at least 20%, in particular at least 40%, of the axial length of the film encloses.
  • the sealing parts are either fusions or bruises, which are H-shaped, preferably the longest dimensions are approximately square, in particular to 30% accurate.
  • the connecting portion is formed by an annular bead on the sealing part.
  • the distance between the neck parts, and sealing should be as small as possible, but it should be at least 0.1 mm, in particular at least 0.7 mm.
  • an improved cooling effect is achieved in that the outer bulb is filled with a cooling-mediating gas, in particular more than 50% of an inert gas such as argon.
  • the axial length of the narrowed region is at least 4 mm, in particular at least 6 mm.
  • the diameter of the neck part in the narrowed area is either constant or smaller towards the outside.
  • the total length of the necked neck portion should normally be at most 20 mm, preferably at most 12 mm.
  • the constriction of a tubular glass body as a precursor of the outer bulb can be generated solely by Formroll- or Formblasvone after preheating.
  • the shorter the neck part the easier this manufacturing process can be applied. In particular, this applies to lengths up to 6 or 10 mm.
  • the necking of the tubular glass body as a precursor of the outer bulb is produced by roll forming or shape blowing processes after preheating combined with hot deformation by drawing out the already necked portions of the outer bulb.
  • the production of such tapered areas is particularly material-saving.
  • the tapering of the ends of the outer bulb should thereby, including the radii or bevels connecting the maximum and minimum radial spreads of the outer bulb, at least over a length of 2 mm and at most over the entire length closely surround the area with the vacuum-tight sealing parts of the lamp.
  • the minimum inner diameter of the usually tubular outer bulb should be removed at its tapered portions not greater than 4 mm from the maximum outer diameter of the lateral sealing parts of the lamp. Also, the minimum inner diameter of the outer bulb may correspond to the maximum outer diameter of the sealing parts and may even be partially interconnected.
  • the outer bulb geometry is designed similar to the geometry of the inner vessel, which basically means that the distance between the outer bulb and the extension parts of the discharge vessel, ie the areas with the vacuum-tight current feedthrough components, should be at most 4 mm.
  • a particular problem is the cost-effective production of such an outer bulb shape.
  • such an outer bulb can also be formed from a blank by glass forming processes. be brought out to the desired shape, which describes a particularly cost-effective embodiment.
  • this technique is suitable for a relatively low power metal halide lamp of 35 to 250 watts.
  • the taper of the outer bulb over a greater length can preferably be carried out in combination with a bead / bump attachment technique on the sealing part, in particular the extension part of a seal of the inner vessel.
  • This technique of creating a bead is known per se, for example EP-A 588 602 or EP-A 465 083 such as DE 10 2004 056 452.3 ,
  • Challenging is the production of the tapered ends of the outer bulb by glass forming over a greater length.
  • a "normal" taper over a maximum of 55% of the diameter of the outer bulb can be made relatively easily by a multi-stage roll forming process with rotating glass.
  • a typical example is a length of the tapered portion, defined here as neck length, of 2 to 12 mm with a typical diameter of about 22 mm of the outer bulb.
  • Easier and less expensive is the production via a combined rolling and drawing process.
  • the maximum possible length HTL of the neck portion that is made in about 50% of the outer diameter of the outer bulb with the known free rolling process.
  • the actual final length of the neck portion is achieved in a further step by pulling in the region of the already rolled section. This has the additional advantage that any accumulations of material on the pre-rolled area can be pulled out again to uniform wall thicknesses.
  • the outer bulb is advantageously a piston with central belly and terminally adjacent thereto, in particular attached or molded, pipe sections, which are referred to here as neck parts.
  • a preferred embodiment provides for the inner vessel a tubular extension piece of the sealing part, on which a bead adjoins. It is especially applied or molded. As a result, the provision of a radially symmetrical bead is possible even with a non-radially symmetrical pinch.
  • the bead can be produced from the sealing part, for example by upsetting, or placed on it as a separate bead. The breaking strength of the connection between outer bulb and bead increases, the more intimate the contact between the two.
  • Both inner flask and outer flask made of quartz glass or hard glass are preferred.
  • FIG. 1a shows the side view of a two-sided squeezed halogen bulb. It consists of an inner piston 1, in the middle part 4, a luminous body 2 is arranged axially.
  • the ends 5 of the filament are embedded in their function as an internal power supply directly into the pinch 6, which acts as a seal, and there connected to a pinch film 7.
  • the pinch 6 has the outside as an extension part, which can also serve as a base component, a tubular glass sleeve 11 which is integrally formed on the pinch.
  • a base may be attached to one end of the sealing part, as known per se, wherein the base has an electrical contact element (not shown), which is electrically connected to a power supply leading to a light source, wherein the contact element in the tubular extension of Sealing part is housed.
  • the distance D between the narrowed neck portion and the H-shaped pinch 6 is 1.5 mm.
  • the distance D means the mean between the valley of the pinch on the broadside and the two peaks of H, see FIG. 1b .
  • An H-shaped pinch has a large surface area and therefore cools the seal very well.
  • FIG. 2a For example, a metal halide lamp 25 sealed by fuses 15 is shown.
  • the one neck part 13a is designed to constrict to the outside, while the other neck part 13b has a constant diameter, but is made of a separate piece of pipe, which is attached to the outer bulb at the inwardly directed slope.
  • the cold filling pressure in the outer bulb with argon filling is in particular 200 to 400 mbar.
  • the production takes place in such a way that first the discharge vessel is formed as a preparation step, equipped with a feedthrough system and filled with a gas filling and then closed. These steps are known per se.
  • a populated inner vessel 30 made of glass is provided, in particular a tube made of quartz glass, which defines an inner volume and which has two sealed ends 31, wherein in each case a current feed-through system 32 projects from the outside via the ends into the volume.
  • This system is in particular an electrode system comprising at least one electrode, a foil and a power supply.
  • the inner volume of the discharge vessel is filled with a gaseous filling, wherein the end 31 of the inner vessel is formed by a sealing member 34 which gas-tightly surrounds a central part of the current feed-through system, and an extension member with a bead 33 which contains an outer part of the current feedthrough system ,
  • a second outer tube 35 of fused silica having a given maximum outer diameter larger in dimension than the discharge vessel and having two open ends, the dimension of the second tube 35 being such that the second tube is the inner volume of the second tube Discharge vessel and at least the sealing area and possibly a certain part of the extension part covered.
  • a fourth step the forming of a first narrowed neck portion 36, at a first end of the second tube 35 over a length of typically 4 to 10 mm by means of a Formrollreaes.
  • the area to be deformed is heated on the glass part and pushed with a rotating forming roller 37 inward so far that the neck portion 36 results in a reduced diameter.
  • a fifth step the forming of a second narrowed neck portion at the second end 31 b by means of a second forming roller 39 is analogous to the fourth step, see FIG. 4 ,
  • the described forming rollers are additionally combined with a withdrawal on the already preformed glass part by heating and subsequent axial pulling (arrow 40), so that the neck portion 36 is additionally extended; please refer FIG. 5 ,
  • each can be purged with argon and possibly even a glovebox be used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)

Claims (10)

  1. Lampe électrique avec une ampoule externe (14) et une ampoule interne allongée (1) scellée de manière étanche au vide, qui définit un axe longitudinal (A), contient un moyen luminescent (2) et est fermée à des extrémités en regard l'une de l'autre par des parties d'étanchéité (6 ; 15) qui contiennent des films (7), dans laquelle l'ampoule externe (14) comprend deux parties de gorge rétrécies (13) à ses extrémités et recouvre l'ampoule interne, et dans laquelle au moins une partie de gorge (13) est fixée sur une section de liaison (12) à l'extrémité de la partie d'étanchéité de l'ampoule interne, dans laquelle il y a une section terminale (Z) de la partie d'étanchéité dans laquelle la distance (D) entre la partie de gorge et la partie d'étanchéité est au maximum 4 mm, dans laquelle cette distance (D) est maintenue par rapport à l'ampoule au moins assez largement pour que la zone rétrécie de la partie de gorge entoure une zone partielle (Y) du film qui enserre au moins 20 % de la longueur axiale du film, caractérisée en ce que les parties d'étanchéité (6 ; 15) sont respectivement conformées en H.
  2. Lampe électrique avec une ampoule externe selon la revendication 1, caractérisée en ce que la section de liaison est formée sur la partie d'étanchéité par un bourrelet annulaire (12).
  3. Lampe électrique avec une ampoule externe selon la revendication 1, caractérisée en ce que la distance minimale de la partie de gorge dans la zone rétrécie est au moins 0,1 mm, en particulier au moins 0,7 mm.
  4. Lampe électrique avec une ampoule externe selon la revendication 1, caractérisée en ce que l'ampoule externe est remplie d'un gaz assurant un refroidissement, en particulier à plus de 50 % d'un gaz inerte comme l'argon.
  5. Lampe électrique avec une ampoule externe selon la revendication 1, caractérisée en ce que la longueur axiale de la zone rétrécie est au moins 4 mm, en particulier au moins 6 mm.
  6. Lampe électrique avec une ampoule externe selon la revendication 1, caractérisée en ce que l'ampoule externe ferme avec ses deux parties de gorge rétrécies un trou se trouvant sur la partie d'étanchéité.
  7. Lampe électrique avec une ampoule externe selon la revendication 1, caractérisée en ce que le diamètre de la partie de gorge dans la zone rétrécie est constant ou plus petit vers l'extérieur.
  8. Lampe électrique avec une ampoule externe selon la revendication 1, caractérisée en ce que la longueur totale de la partie de gorge rétrécie est au maximum 20 mm, de préférence au maximum 12 mm, dans laquelle le rétrécissement d'un corps de verre tubulaire comme précurseur de l'ampoule externe est produit seulement par des procédés de laminage de forme ou de soufflage de forme selon le chauffage antérieur.
  9. Lampe électrique avec une ampoule externe selon la revendication 1, caractérisée en ce que la longueur totale de la partie de gorge rétrécie est au minimum 6 mm, de préférence au moins 11 mm, dans laquelle le rétrécissement d'un corps de verre tubulaire comme précurseur de l'ampoule externe est produit par des procédés de laminage de forme ou de soufflage de forme selon le chauffage antérieur, combinés avec une déformation à chaud par des procédés d'extraction des parties déjà rétrécies de l'ampoule externe.
  10. Lampe électrique avec une ampoule externe selon la revendication 1, caractérisée en ce que l'ampoule externe et les parties de gorge rétrécies sont composées de plusieurs pièces de différentes dimensions.
EP06762862.8A 2005-07-29 2006-07-27 Lampe électrique à ampoule externe Not-in-force EP1911065B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005035779A DE102005035779A1 (de) 2005-07-29 2005-07-29 Elektrische Lampe mit Aussenkolben
PCT/EP2006/007470 WO2007014705A2 (fr) 2005-07-29 2006-07-27 Lampe électrique à ampoule externe

Publications (2)

Publication Number Publication Date
EP1911065A2 EP1911065A2 (fr) 2008-04-16
EP1911065B1 true EP1911065B1 (fr) 2016-11-30

Family

ID=37575204

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06762862.8A Not-in-force EP1911065B1 (fr) 2005-07-29 2006-07-27 Lampe électrique à ampoule externe

Country Status (7)

Country Link
US (1) US20090115303A1 (fr)
EP (1) EP1911065B1 (fr)
JP (1) JP4755688B2 (fr)
CN (1) CN101233599B (fr)
CA (1) CA2617574A1 (fr)
DE (1) DE102005035779A1 (fr)
WO (1) WO2007014705A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009015894A1 (de) 2009-04-01 2010-10-07 Osram Gesellschaft mit beschränkter Haftung Elektrische Lampe
DE102009016057A1 (de) * 2009-04-02 2010-10-07 Osram Gesellschaft mit beschränkter Haftung Elektrische Lampe mit Außenkolben

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4935668A (en) * 1988-02-18 1990-06-19 General Electric Company Metal halide lamp having vacuum shroud for improved performance
US4949003A (en) * 1988-12-21 1990-08-14 Gte Products Corporation Oxygen protected electric lamp
CA2042143A1 (fr) * 1990-06-27 1991-12-28 John J. Biel Lampe a decharge a protection peripherique et methode de fabrication connexe
US5359255A (en) * 1991-07-25 1994-10-25 Hamamatsu Photonics K.K. Discharge tube having a double-tube type structure
US5253153A (en) * 1992-09-16 1993-10-12 General Electric Company Vehicle headlamp comprising a metal-halide discharge lamp including an inner envelope and a surrounding shroud
JP3246147B2 (ja) * 1993-12-27 2002-01-15 松下電器産業株式会社 放電ランプの製造方法
JPH08273599A (ja) * 1995-03-30 1996-10-18 Toshiba Lighting & Technol Corp メタルハライドランプ、点灯装置および照明装置
EP0964431B2 (fr) * 1998-06-12 2007-04-04 Matsushita Electric Industrial Co., Ltd. Lampe à décharge
JP3652602B2 (ja) * 2000-12-05 2005-05-25 株式会社小糸製作所 アークチューブおよびその製造方法
JP3916887B2 (ja) * 2001-06-05 2007-05-23 株式会社小糸製作所 照明装置
DE10325554A1 (de) * 2003-06-05 2004-12-23 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Verfahren zur Herstellung einer elektrischen Lampe mit Außenkolben
US7134290B2 (en) * 2004-07-16 2006-11-14 Carrier Corporation Phase correction method and apparatus

Also Published As

Publication number Publication date
DE102005035779A1 (de) 2007-02-01
US20090115303A1 (en) 2009-05-07
JP2009503774A (ja) 2009-01-29
CN101233599B (zh) 2010-06-16
EP1911065A2 (fr) 2008-04-16
CN101233599A (zh) 2008-07-30
CA2617574A1 (fr) 2007-02-08
WO2007014705A2 (fr) 2007-02-08
JP4755688B2 (ja) 2011-08-24
WO2007014705A3 (fr) 2007-05-31

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