WO2010069680A1 - Récipient de lampe avec une traversée de ligne et raccordement par film - Google Patents

Récipient de lampe avec une traversée de ligne et raccordement par film Download PDF

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Publication number
WO2010069680A1
WO2010069680A1 PCT/EP2009/064977 EP2009064977W WO2010069680A1 WO 2010069680 A1 WO2010069680 A1 WO 2010069680A1 EP 2009064977 W EP2009064977 W EP 2009064977W WO 2010069680 A1 WO2010069680 A1 WO 2010069680A1
Authority
WO
WIPO (PCT)
Prior art keywords
film
rod
cross
lamp
sectional profile
Prior art date
Application number
PCT/EP2009/064977
Other languages
German (de)
English (en)
Inventor
Joachim Jens Bernhardt
Original Assignee
Osram Gesellschaft mit beschränkter Haftung
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 Gesellschaft mit beschränkter Haftung filed Critical Osram Gesellschaft mit beschränkter Haftung
Publication of WO2010069680A1 publication Critical patent/WO2010069680A1/fr

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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
    • H01J61/36—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

Definitions

  • the invention relates to a cable bushing with an electrically conductive foil in a lamp with a lamp vessel.
  • Cable bushings in such lamps are often made by means of thin metal foil strips, which are melted for sealing, for example, in a shaft of the lamp and connected at least on one side with another electrically conductive, rod-shaped component of the lamp, such as an electrode rod.
  • the films are specifically designed to provide as good a bond as possible to the lamp vessel material, i. regularly glass, and usually quartz glass to enter.
  • the glass often adheres much poorer to the rod-shaped component, which is why a gap-like free space can form between it and the glass.
  • the present invention is based on the problem to improve cable feedthroughs in said lamps and to increase the life of the lamps.
  • the invention is directed to a lamp with a lamp vessel, a line feedthrough through the lamp vessel with an electrically conductive foil and an electrically conductive rod with one end, with which the foil is electrically conductively connected, characterized in that the foil with a Front side adjacent to the rod and the maximum maximum width in the cross-sectional profile of the film transverse to the feedthrough direction is at least 10% greater than the largest width in the cross-sectional profile of the rod at the end.
  • the invention is directed to a method for producing the lamp and to the use of the lamp for projection and as a light source in endoscopy.
  • the rod is understood here as an electrically conductive component of the lamp, which forms the current from or to the film, where it may be both a continuation in the direction of the combustion chamber, ie to the place of light generation, as well as in the opposite direction, for example out of the lamp vessel, can lead.
  • the staff can request a contact pin or wire passing through the outer surface of the lamp vessel to provide electrical power to the lamp, as well as being a (live) holding device or component thereof for an incandescent filament.
  • the film is connected on both sides at opposite ends in each case with a rod, one of which leads in the direction of the combustion chamber and the other through the outer surface of the lamp vessel.
  • the rod end, with which the film is electrically conductively connected not only denotes exactly the outermost point in one direction or the outermost interface of the rod in the mathematical sense, but rather also the region or section of the rod immediately adjacent thereto to understand a certain spatial extent.
  • the lamp vessel When lamps are operated, the lamp vessel is heated and, in particular, material transitions can cause high mechanical stresses and consequently cracks if the materials have different coefficients of thermal expansion.
  • the absolute expansion increases during heating with the dimension of the material in the same direction, which is why the film shows only a small extent in this direction due to its small thickness and thus causes only relatively low voltages.
  • perpendicular to it ie in the longitudinal and transverse directions of the film, occurring stresses due to the flexibility of the film are reduced.
  • the rod relative to the film is relatively rigid and significantly thicker, so it is particularly in directions transverse to the direction of implementation can expand more than the film.
  • the invention is also particularly directed to high-pressure discharge lamps, in which both high temperatures occur and high pressures prevail in the interior of the lamp vessel, so that the avoidance of stress cracks is particularly important here.
  • the film of the line leadthrough is preferably connected directly to the shank-side end of the electrode, for example with a so-called core pin; in this case, therefore, the rod described is an electrode part.
  • the invention may also be helpful in other lamp types, for example halogen lamps.
  • the contact area the range of electrically conductive compound of film and rod, problematic, wherein in conventional cable bushings, the film for sufficient current carrying capacity with at least 1 mm - 2 mm overlap in the direction of implementation with their Obertial. Bottom welded outside on the lateral surface of the rod.
  • the film then rests in direct contact on the outside of the rod, while, in particular, it is also subject to the surrounding glass on its side facing away from the rod because of its material properties. Consequently, in the contact region, the (significant) thermal expansion of the rod is transferred from the overlying film directly to the glass adhering to it.
  • the invention is based on the idea to make the contact area of film and rod as small as possible.
  • the invention particularly aims at contact areas, for example in the vicinity of the discharge space in a high-pressure discharge lamp, which are strongly heated during operation.
  • the film adjoins the rod with an end face.
  • the film is preferably adjacent to the rod only with one or a plurality of end faces.
  • Such an end face of the film is preferably facing the rod surface, so it is not directly perpendicular to this.
  • the film even in some areas, may be slightly spaced from the rod, for example, up to a distance of a few film thicknesses. strengthen, but preferably at most one foil thickness. Incidentally, this distance can also be bridged or filled by an electrical connection, for example a welded seam.
  • the front side of the film denotes a region of the surface which is determined by the thickness of the film.
  • An end face in the feedthrough direction then designates a surface area with a surface normal with an angle of less than 90 °, in particular also preferably at most 60 °, 45 °, 30 ° or 15 °, to the feedthrough direction, ie a side with at least one obliquely or transversely to this Direction extending surface, which is therefore inclined in or perpendicular to the feedthrough direction.
  • the term end face is also to be understood below, with which a contiguous, possibly in particular not interrupted by a kink, an edge or a ridge, but possibly curved region of an end face is designated.
  • one end side or one or more, for example, by an edge of the surface separated from each other, having end faces, according to the invention at least one end face of the film adjacent to the rod, but not necessarily each adjacent to the rod end face must be electrically connected directly.
  • this end face is analogous to an end face of the film, but with respect to the rod diameter to understand.
  • Such an embodiment can be produced, for example, in a simplified manner (see below).
  • the film is adjacent only to the front side of the rod end in the direction of execution.
  • exactly one end face of the foil can adjoin exactly one end face of the rod and foil and rod can only be electrically conductively connected to one another there, so that only one contact area has to be produced during production.
  • Particularly preferred are these end faces of the rod and foil also facing each other in the direction of execution and at least partially opposite end faces.
  • the foil and the rod do not overlap in any projection perpendicular to the feedthrough direction, so that the foil and the rod are delimited in the feedthrough direction from one another by their abutting end faces.
  • the rod is then not covered by foil on its circumference perpendicular to the feedthrough direction, so that it can have the described gap-like free space on its entire circumference transversely to the feedthrough direction because of low glass adhesion and thermal expansion reduces the risk of stress cracks in the glass.
  • cross-section refers to the meaning of a cross-section in a sectional plane perpendicular to the direction of execution. needs.
  • line cross-section and cross-sectional area eg, the film or the bar
  • the power and thus the light output of lamps can be increased only with larger currents, which, it has been found, larger cable cross-sections, in particular the films appear advantageous.
  • the current carrying capacity of the cable feedthrough can be improved by a wider film even if the contact surface between film and rod according to the invention compared to the average conductor cross-section of the film is lower, since, for example, the contacting of the end faces the cross-section of the Line bushing along the feedthrough direction only on a (negligible) short section, namely the area of the contact itself, limited. As a result, the total line resistance and thus also the line losses are kept correspondingly low.
  • the maximum maximum width in the cross-sectional profile of the film transversely to the feedthrough direction at least 10% greater than the largest width in the cross-sectional profile of the rod at the end, which is electrically connected to the film.
  • the film may also be in this order increasingly preferably at least 20%, 50%, 100% or 150% greater than the largest width in the cross-sectional profile of the rod end.
  • the (maximum) width of the (completed) In this order, the film is increasingly preferably at most 10 mm, 5 mm, 3 mm or 2 mm and / or the maximum diameter of the rod end perpendicular to the feedthrough direction can be 0.3 mm - 3 mm.
  • the film width can decrease along a region in the direction of passage in the direction of the rod and also as far as the rod, even to the extent that the film does not protrude beyond the end face of the rod in a cross section in the contact region.
  • the tapering of the film toward the contact region allows the film to be predominantly or even completely adjacent to the rod with at least one end face in the feedthrough direction. Then there must not be any sharp-edged or at least strongly curved profile of the edge of the film enclosed by the glass on the front side and also the frontal edges can thus run away from the heat source, so that the risk of stress cracks also reduced.
  • the film preferably has a constant width in the cross-sectional profile over its entire length in the feedthrough direction for an overall higher current carrying capacity. In this case, then projects the end face of the film in a cross section in the contact area at least on one side, preferably also on both sides beyond the end face of the rod out, and obliquely or preferably also perpendicular to the feedthrough direction.
  • the contact surface may, although not preferred, also be smaller than the adjoining surfaces of the rod and the foil, for example in the case of only partial or one-sided welding.
  • the invention thus enables a large line cross-section along the film, since the maximum width in the cross-sectional profile of the film is wider than that of the bar end, specifically in sections in the case of the taper, but preferably over the entire length of the film in the feedthrough direction.
  • the maximum width of the film in the cross-sectional profile is thus not limited in particular by the rod diameter.
  • the film is therefore on both sides of these and / or also to the frontal edges out, for example, by etching, tapered and / or rounded.
  • the film has a continuous area of uniform thickness therebetween.
  • this thickness of the film may be more preferably at most 100 ⁇ m, 70 ⁇ m, 60 ⁇ m or 55 ⁇ m and / or in this order increasingly preferably at least 5 ⁇ m, 10 ⁇ m or 15 ⁇ m in order to have a favorable flexibility and nevertheless sufficient To ensure current carrying capacity.
  • the film has at least 80 wt%, 85 wt%, 90 wt%, or 95 wt% molybdenum.
  • the electrical connection between the film and rod can be done by fusing, soldering or preferably by welding, for example by contact welding or laser welding.
  • foil and rod for (electrical) contacting to each other (mechanical) stop their front sides are approached.
  • the proximity movement can be limited by the mutual contact of the end faces forming the abutment surfaces, the area of the mechanical contact preferably overlapping or even coinciding with the subsequently produced electrical contact area during the abutment.
  • the foil and the rod for (electrical) contacting can be approached one another along the feedthrough direction, preferably until the previously described (mechanical) stop. This direction may then correspond to the direction of passage in a shaft of the lamp.
  • a profiling of the film is advantageous in that by the thus obtained additional mechanical stiffening of the film a more precise guidance and lower deflection and / or deformation, especially in mutual abutment of the end faces of the film and rod, can be achieved.
  • the tread depth may be in this order increasingly preferably at least 1%, 2%, 5%, 8% or 10% of the maximum maximum width in the cross-sectional profile of the film.
  • the profiling can be carried out by means of customary procedures during production or by subsequent processing of the product.
  • the film is profiled at least transversely to the feedthrough direction, so that its cross-sectional profile has a correspondingly curved profile shape.
  • U, V or especially W profiles are preferred as profile shapes;
  • a round, for example nikseg- ment shaped profile is conceivable.
  • the film can also be profiled only in this direction, ie have a profiling only in cross-section, in contrast, be in a longitudinal section of rectilinear shape. With such a profiling, a quasi-continuous film strand can be provided in a particularly simple manner.
  • the profiling of the cross-sectional profile of the film increases the line cross-section for a given diameter of the line feedthrough by the width of the (unwound) film increases with the same width of the cross-sectional profile.
  • this design also allows the reduction of the diameter while maintaining the current carrying capacity of the cable bushing, and of course the utilization of both possibilities simultaneously.
  • a maximum tread depth of in this order increasingly preferably at most 50%, 30%, 20%, 15% or 12% of the maximum maximum width in the cross-sectional profile of the film may be suitable.
  • the risk of bursting of the lamp vessel increases, so that the largest width in the cross-sectional profile of the film in this order is increasingly preferably at most five, four or three times the largest width in the cross-sectional profile of the film side bar end.
  • Lamps according to the invention can be used, for example, in projectors or in the medical field as a light source in endoscopy.
  • the operating power can be at most 500W and the maximum width in the cross-sectional profile of the shaft-side end of the rod can preferably be at most 0.6 mm.
  • FIG. 1 shows a detail of a cable bushing according to the invention in the region of the connection of Foil and electrode before and after contacting and in a section transverse to the direction of execution
  • FIG. 2 shows the detail according to FIG. 1 (center) with different embodiments of the film and arrangements of the contact region and
  • FIG. 3 shows the detail of Figure 1 (center) with various embodiments of the invention end faces of the film-side electrode end and their contacting with the film.
  • the reference symbols used below are composed of a first digit corresponding to the numbered figures, a second number characterizing corresponding features, a letter corresponding to the respective subfigure, and possibly a fourth, consecutive number.
  • FIG. 1 shows, as a detail, a part of a leadthrough of a high-pressure discharge lamp intended for use in a projector with an operating power of at most 350W.
  • a molybdenum-containing, continuous 1.5 mm wide film 12 with a thickness of 17 microns is welded with its end face 14 in abutment against the end face 13 of the film side, with a diameter of 0.5 mm cylindrical end of an electrode 11 and melted in a shaft of the quartz glass lamp vessel.
  • the upper third of Figure 1 shows the electrode 11 and the film 12 in a plan view perpendicular to the top of the film prior to their electrical contact (welding).
  • the contact region 15 produced in this way is shown between the film 12 and the electrode 11, which are arranged in the feedthrough direction in the middle of their axis in this exemplary embodiment.
  • the line cross section of the contact region 15 is approximately one third of the area of the end face 14 of the film 12.
  • Figure 1 shows the cross-sectional profile of the film 12 and the electrode 11 and the (curved)maschinebe- rich 15.
  • the film 12 is profiled transversely to the feedthrough direction W-shaped, the profile depth is 0.15 mm, so that the width of the line feedthrough total compared to the (developed) width of the film 12 of 1.5 mm is slightly smaller.
  • the profile causes a stiffening of the film 12 and reduces the deflection along the feedthrough direction, for example during the approach shown in Figure 1 above of film 12 and electrode 11.
  • Figure 2 illustrates further embodiments of the cable bushing in plan view perpendicular to the top of the film.
  • Part 2a shows a line feedthrough in which foil 22a and electrode 21a are not arranged in the center of each other, but are aligned with one of their edges.
  • the following three subfigures 2b, 2c and 2d show a tapering of the film 22b, 22c, 22d, towards the electrode 21b, 21c, 21d, so that the end faces facing thereon on average a greater distance from the heat source in the lamp, namely the Gas discharge, and thereby reduces the risk of stress cracking at these edges of the film is reduced.
  • the film 22b has a taper down to the front end of the electrode 21b, so that there the width of the film 22b is reduced to the width in the cross-sectional profile of the electrode 21b.
  • part of Figure 2c shows a modified taper, which extends to the cross-sectional plane of the contact portion 25c, while the film width is only reduced by one third, ie to twice the diameter of the rod 21c and thus has a higher current carrying capacity compared to the previous embodiment.
  • the taper takes place to the same extent as in Figure 2c, but does not reach up to the cross-sectional plane of the contact portion 25d, but takes place in the direction of execution before it.
  • the film 22c could be reduced in a further embodiment, not shown, to the bar diameter, so that the entire non-welded portion of the front side, which is melted by glass, would have an increased distance to the heat source. However, this would also involve a further reduction in current carrying capacity.
  • Partial drawing 2e shows a foil 22e with a rectangular recess which surrounds the end of the electrode 21e.
  • the film 22e is not welded to the end face 24e2 in the feedthrough direction but to the electrode 21e with lateral end faces 24el, 24e3 parallel to the feedthrough direction ,
  • Partial drawing 2f shows a foil 22f with one end face with four end faces 24fl, 24f2, 24f3, 24f4 in the feedthrough direction and one electrode 21f with a frustoconical end with only two end faces 23fl, 23f2 in the feedthrough direction.
  • the contact region 25f extends on three adjoining surfaces 23fl, 24f2, 24f3. This embodiment demonstrates that there must be no numerical matching of the end faces 23fl, 23f2, 24fl, 24f2, 24f3, 24f4 of foil 22f and electrode 21f.
  • FIG. 3 various embodiments of the film-side end of the electrode are shown, in the sub-figures 3a - 3c each left in plan view perpendicular to the film top and right side view perpendicular to the direction of implementation and in part figure 3d only in plan view.
  • the foils shown in FIG. 3 also have a plane cross-sectional profile with a width of 1.5 mm compared to FIG. 1, although a profiling is likewise conceivable here.
  • part figure 3a shows a direction of execution obliquely running face 33a.
  • film 32a and electrode 31a overlap in a projection perpendicular to the feedthrough direction, but it becomes clear that, in this case as well, only a small-area contact region 35a occurs in accordance with the invention and, in particular, film 32a does not lie flat.
  • Part 3b shows an end face 33b in the form of a groove, which facilitates the centering of the contact region 35b of the film 32b with respect to the electrode 31b.
  • other groove shapes for example with acute flanks, are conceivable.
  • Partial drawing 3c shows an electrode 31c having an end face with two end faces 33cl, 33c2, which are separated from each other by an edge, which is formed, for example, by pinching off the electrode 31c from a rod-shaped material during production.
  • the foil 32c with its end face 34c can also be welded onto the edge and is thus virtually connected to both end faces 33c1, 33c2 of the electrode; Likewise, it could also border on only one of the end faces 33cl, 33c2.
  • the sub-figure 3d shows an embodiment in which the end face of the electrode 31d has a certain surface roughness, for example due to the production.
  • this surface structure can also be impressed at the end of the approximation shown in the left half by the mutual abutment of film 32d and electrode 31d of film 32d. This can also be a single edge, comparable part of Figure 3c, or a production-related ridge.
  • the exact shape of the contact region 35d, shown in the right half of the subfigure 3d can thus be determined by the shape of the electrode end.
  • this structure could also be covered by a (substantially) rectilinear contact area which does not dissolve this structure, however.

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

Abstract

L'invention concerne une lampe avec une traversée de ligne au travers du récipient qui comprend un film électriquement conducteur (12, 22a-22f, 32a-32d). Le film (12, 22a-22f, 32a-32d) est relié de manière électriquement conductrice à une tige électriquement conductrice (11, 21a-21f, 31a-31d) et le film (12, 22a-22f, 32a-32d), dans la direction de traversée, avoisine par une face frontale (14, 24e1-24e3, 24f1-24f4, 34c) une face frontale (13, 23e, 26f1, 26f2, 33a, 33b, 33c1, 33c2) de la tige (11, 21a-21f, 31a-31d). La largeur maximale du film (12, 22a-22f, 32a-32d), en coupe perpendiculaire à la direction de la traversée, est d'au moins 10 % supérieure à la largeur maximale de la tige (11, 21a-21f, 31a-31d) sur son profil transversal.
PCT/EP2009/064977 2008-12-19 2009-11-11 Récipient de lampe avec une traversée de ligne et raccordement par film WO2010069680A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008064056.5 2008-12-19
DE200810064056 DE102008064056A1 (de) 2008-12-19 2008-12-19 Leitungsdurchführung mit Folienanschluss

Publications (1)

Publication Number Publication Date
WO2010069680A1 true WO2010069680A1 (fr) 2010-06-24

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Application Number Title Priority Date Filing Date
PCT/EP2009/064977 WO2010069680A1 (fr) 2008-12-19 2009-11-11 Récipient de lampe avec une traversée de ligne et raccordement par film

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WO (1) WO2010069680A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54106080A (en) * 1978-02-08 1979-08-20 Toshiba Corp Manufacture of single crystal
JPH1116540A (ja) * 1998-04-17 1999-01-22 Seiko Epson Corp 投写型表示装置
EP1067581A2 (fr) * 1999-07-05 2001-01-10 Ushiodenki Kabushiki Kaisha Lampe à décharge
JP2001126662A (ja) * 1999-10-22 2001-05-11 Ushio Inc ショートアーク型超高圧放電灯
EP1343196A2 (fr) * 2002-03-05 2003-09-10 Ushiodenki Kabushiki Kaisha Lampe à décharge à très haute pression du type à arc court

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4959587A (en) * 1989-01-13 1990-09-25 Venture Lighting International, Inc. Arc tube assembly
DE20005531U1 (de) * 2000-03-29 2000-06-21 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Kurzbogenlampe
DE102004036977A1 (de) * 2004-07-30 2006-02-16 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Zweiseitig verschlossene elektrische Lampe
DE102006011732A1 (de) * 2005-03-24 2006-09-28 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Metallhalogenidlampe mit keramischen Entladungsgefäß
JP4487969B2 (ja) * 2006-04-10 2010-06-23 ウシオ電機株式会社 放電ランプ
JP4797790B2 (ja) * 2006-05-22 2011-10-19 ウシオ電機株式会社 放電ランプ

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54106080A (en) * 1978-02-08 1979-08-20 Toshiba Corp Manufacture of single crystal
JPH1116540A (ja) * 1998-04-17 1999-01-22 Seiko Epson Corp 投写型表示装置
EP1067581A2 (fr) * 1999-07-05 2001-01-10 Ushiodenki Kabushiki Kaisha Lampe à décharge
JP2001126662A (ja) * 1999-10-22 2001-05-11 Ushio Inc ショートアーク型超高圧放電灯
EP1343196A2 (fr) * 2002-03-05 2003-09-10 Ushiodenki Kabushiki Kaisha Lampe à décharge à très haute pression du type à arc court

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