EP0316617A2 - High pressure discharge lamp - Google Patents

High pressure discharge lamp Download PDF

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Publication number
EP0316617A2
EP0316617A2 EP88117682A EP88117682A EP0316617A2 EP 0316617 A2 EP0316617 A2 EP 0316617A2 EP 88117682 A EP88117682 A EP 88117682A EP 88117682 A EP88117682 A EP 88117682A EP 0316617 A2 EP0316617 A2 EP 0316617A2
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EP
European Patent Office
Prior art keywords
pressure discharge
discharge lamp
frame
discharge vessel
lamp according
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Granted
Application number
EP88117682A
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German (de)
French (fr)
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EP0316617A3 (en
EP0316617B1 (en
Inventor
Joachim Dassler
Klaus Kramer
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Osram GmbH
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Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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Publication of EP0316617A3 publication Critical patent/EP0316617A3/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/34—Double-wall vessels or containers

Definitions

  • the invention relates to a high-pressure discharge lamp according to the preamble of claim 1.
  • Such high-pressure discharge lamps can be high-pressure sodium discharge lamps with a discharge vessel made of aluminum oxide ceramic or metal halide discharge lamps with a discharge vessel made of quartz glass.
  • Such lamps with high powers previously required a stable holding frame for the discharge vessel, which is composed of many individual parts.
  • the invention has for its object to further simplify the structure of the support frame. This object is achieved by the characterizing features of claim 1.
  • the advantages that can be achieved with the invention are, in particular, that a reduction of the parts Number of the support frame facilitates the production on a rack assembly machine. Furthermore, the problem of thermal expansion and the electrical connection is solved at the same time and undesirable vibrations are damped with almost no deflection from the lamp axis.
  • FIG. 1 shows a high-pressure sodium discharge lamp 1 with a power consumption of 150 W. It has a cylindrical outer bulb 2 made of tempered glass with a screw base 3. A fastening nipple 4 for the frame 5 is formed on the end of the outer bulb remote from the base.
  • the frame has two feed wires 6, which are melted in a vacuum-tight manner in the outer bulb by means of a plate melting 7 and are connected to the base 3 in the usual way.
  • the power supply lines 6 are divided into three parts.
  • the base end piece is made of nickel, the middle piece (area of the bushing) made of tungsten and the base end piece made of nickel with 2% manganese additive or nickel-plated iron.
  • the discharge vessel 8 made of translucent aluminum oxide ceramic is arranged axially.
  • One of the supply wires 6a is connected in a manner known per se via a further U-shaped angled lead wire 9 (made of nickel with 2% manganese addition or nickel-plated iron) with the current lead 10a designed as a niobium tube for the lower, i.e. near the base electrode 11 of the discharge vessel connected.
  • the feed wire 6a is angled at a 45 ° angle so that it can be welded to the lead wire 9 at two points of contact.
  • the end of the discharge vessel 8 near the base is thus rigidly held in the lamp axis.
  • the power supply is fitted in a vacuum-tight manner into the discharge vessel by means of a ceramic end plug.
  • the second feed wire 6b is also connected in a known manner to a metal support rod 12 which is guided parallel to the discharge vessel 8 to the end of the outer bulb 2 remote from the base.
  • the feed wire 6b is also angled at a 45 ° angle and welded to the metal support rod 12, which has an end part bent at a right angle, at two points of contact.
  • the end of the metal support rod 12 which is remote from the base is angled transversely to the lamp axis and is bent into a pitch circle 13 which includes the fastening nipple 4 as a holder.
  • the diameter of the pitch circle is selected such that it lies against the end of the outer bulb remote from the base.
  • the support rod is made of nickel with a 2% manganese additive or of nickel-plated iron.
  • the electrode 14 of the discharge vessel 8, which is remote from the base, is connected to a leaf spring stamped part 15 made of stainless steel via a base supply lead 10b which is formed as a niobium tube.
  • the plane of the stamped part 15 is arranged perpendicular to the lamp axis.
  • the stamped part 15 is connected directly to the support rod 12 of the frame 5 via an angled welding plate 16 by projection welding.
  • the welding plate has three beads (humps).
  • the stamped part 15 itself is shown in an enlarged view from above in FIG. It essentially consists of a stabilizing outer frame part 17 and an intermediate part 18 arranged inside.
  • the outer frame part 17 is formed by two arms 19, which are integrally formed on one side of a plate-like extension 21, expand and end in two mutually parallel sections 20 .
  • the attachment piece 21 also has the welding plate 16 angled by 90 ° on another side for mounting on the frame.
  • the two end sections 20 are led back in a meandering shape by 180 ° in the direction of the extension piece 21 and connected to one another via the intermediate part 18.
  • the intermediate part 18 has a plate-like fastening element 22, which is provided with a central bore 23.
  • the bore 23 is arranged exactly in the lamp axis in the built-in lamp (FIG. 1).
  • the upper power supply line 10b is in turn attached to the fastening element 22 by means of projection welding, the fastening element 22 having three beads (projection) 27 (visible in FIG. 2) starting from the center for better welding of the Nb tube to the intermediate part.
  • the ceramic discharge vessel 8 expands along the lamp axis in the direction of the fastening nipple 4.
  • the leaf spring stamped part 15 can follow this expansion.
  • the distance h1 between the welding plate acting as a fixed point on the support rod and the discharge vessel expanding along the lamp axis is relatively large.
  • This long "lever travel" h1 (in FIG. 2) has two disadvantages in comparison to the preferred embodiment of the leaf spring part as a stamped part. Firstly, it leads to poorer damping behavior in the case of vibrations, and secondly, at very high temperatures and a correspondingly large expansion, there can be a slight lateral deflection of the upper end of the discharge vessel.
  • the "lever path” is quasi shortened by the stable frame part and essentially only the intermediate part springs against the frame part. Only about half the distance h2 (FIG. 2) between the 180 ° bend at the end section 20 and the bore 23 is to be understood as a "lever path". The shorter lever travel improves the damping properties. In addition, the lateral deflection of the discharge vessel is minimized.
  • the distance h1 is at this exemplary embodiment about 17 mm long, the distance h2 about 9 mm long.
  • the leaf spring stamped part enables a secure electrical connection between the upper power supply and the support rod of the holding frame (via the welding plate 16 and via the welding beads 27 in the vicinity of the bore 23). At the same time, it can follow the thermal expansion of the discharge vessel during operation (approx. 1 mm) and dampens unwanted vibrations.
  • Figure 3 shows another embodiment of the support frame of the high pressure sodium lamp.
  • the meaning of the reference numerals corresponds to that of FIG. 1.
  • the upper power supply 10b but also the lower power supply 10a are now connected to the holding frame 5 via a leaf spring stamped part 15.
  • the welding plate 16 of the additional stamped part 15 is connected directly to the first feed wire 6a.
  • FIG. 4 Another embodiment is shown in FIG. 4.
  • This is a metal halide high-pressure discharge lamp known per se with an outer bulb (not shown) and with an axially arranged discharge vessel 24 made of quartz glass, which has pinch seals at both ends into which current leads 25a, b made of molybdenum wire are melted in a vacuum-tight manner.
  • Such lamps are described for example in EP-OS 173 235 and in EP-OS 145 072.
  • According to the upper power supply 25b is connected to the support rod 12 of the holding frame 5 again via a leaf spring stamped part 15 '. It essentially corresponds again to the embodiment shown in FIG. Due to the significantly smaller diameter of the molybdenum wire (approx.
  • the fastening element 22 ' is equipped with a welding plate 26 angled by 90 °, on which the power supply 25b is attached.
  • the welding plate 26 is similar to the frame-side welding plate 16 '.
  • This type of attachment can also be used in high-pressure sodium lamps which have a wire power supply instead of a tubular power supply (see, for example, EP-OS 160 445).
  • a getter ring and / or a getter pellet can be attached in the outer bulb.

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  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

In a high-pressure discharge lamp (1), the tubular discharge vessel (8) is held in the outer bulb (2) by means of a frame (5); the frame (5) consists of two supply wires (6a, 6b), one of which is connected to a supporting bar (12), aligned parallel to the discharge vessel (8); at least one of the power supplies led out of the discharge vessel (8) is connected to the frame (5) in an electrically conductive and mechanically rigid manner via a leaf spring stamped part (15); the latter has an outer frame part (17) and an inner intermediate part (18) sprung against it; this simplified construction of the frame (5) simultaneously solves the problem of thermal expansion and that of the electrical supply. <IMAGE>

Description

Die Erfindung bezieht sich auf eine Hochdruckentla­dungslampe nach dem Oberbegriff des Anspruchs 1.The invention relates to a high-pressure discharge lamp according to the preamble of claim 1.

Bei derartigen Hochdruckentladungslampen kann es sich um Natriumhochdruckentladungslampen mit einem Entla­dungsgefäß aus Aluminiumoxidkeramik oder um Metall­halogenidentladungslampen mit einem Entladungsgefäß aus Quarzglas handeln.Such high-pressure discharge lamps can be high-pressure sodium discharge lamps with a discharge vessel made of aluminum oxide ceramic or metal halide discharge lamps with a discharge vessel made of quartz glass.

Derartige Lampen mit hohen Leistungen (z.B. 250 W) benötigen bisher ein stabiles Haltegestell für das Entladungsgefäß, das aus vielen Einzelteilen zusam­mengesetzt ist.Such lamps with high powers (e.g. 250 W) previously required a stable holding frame for the discharge vessel, which is composed of many individual parts.

Besonders bei Natriumhochdruckentladungslampen tritt das Problem auf, daß das keramische Entladungsgefäß einen außerordentlich hohen Ausdehnungskoeffizienten aufweist. Es ist wegen der hohen Betriebstemperaturen (ca. 1000 °C) daher notwendig, eine Anpassung an die unterschiedliche Ausdehnung (verglichen mit metalli­schem Haltegestell und gläsernem Außenkolben) vorzu­nehmen. Hierbei ist es wünschenswert, die axiale Ausrichtung des Entladungsgefäßes aufrechtzuerhalten, da derartige Lampen häufig in Reflektoren eingesetzt werden.The problem arises in particular in the case of high-pressure sodium discharge lamps that the ceramic discharge vessel has an extremely high coefficient of expansion. Due to the high operating temperatures (approx. 1000 ° C), it is therefore necessary to adapt to the different expansion (compared to the metal holding frame and the glass outer bulb). It is desirable to maintain the axial alignment of the discharge vessel, since such lamps are often used in reflectors.

Hierbei mußte bisher das Problem der Wärmeausdehnung des Entladungsgefäßes und das Problem der sicheren elektrischen Verbindung zwischen Stromzuführung des Entladungsgefäßes und Haltegestell immer getrennt gelöst werden.So far, the problem of thermal expansion of the discharge vessel and the problem of safe have had to be considered electrical connection between the power supply of the discharge vessel and the support frame must always be disconnected.

Aus der DE-OS 29 35 980 ist bekannt, die Wärmeausdeh­nung mittels einer axialen Bohrung in einem Zylinder aus Isoliermaterial zu kompensieren. Der Zylinder ist mit einem Federband am Haltegestell befestigt. Ande­rerseits erfolgt die elektrische Zuleitung über eine bewegliche offene 180°-Schleife aus dünnem Draht oder Metallfolie. Unerwünschte Schwingungen werden durch diese Anordnung nicht gedämpft.From DE-OS 29 35 980 it is known to compensate for the thermal expansion by means of an axial bore in a cylinder made of insulating material. The cylinder is attached to the mounting frame with a spring band. On the other hand, the electrical supply is via a movable, open 180 ° loop made of thin wire or metal foil. Unwanted vibrations are not dampened by this arrangement.

In der US-PS 3 882 346 wird die Wärmeausdehnung des Entladungsgefäßes von der axial angeordneten Schlaufe eines am Haltegestell befestigten Stützdrahtes aufge­fangen. Die elektrische Verbindung zwischen Haltege­stell und Stromzuführung wird durch ein elastisches Metallband hergestellt, das zugleich dämpfend auf Schwingungen wirkt. Dadurch, daß die Ebene des Metall­bandes in der Lampenlängsachse liegt, finden diese Schwingungen quer zur Lampenachse statt, was die optischen Eigenschaften verschlechtert.In US Pat. No. 3,882,346, the thermal expansion of the discharge vessel is absorbed by the axially arranged loop of a support wire fastened to the holding frame. The electrical connection between the support frame and the power supply is made by an elastic metal band, which also dampens vibrations. Because the plane of the metal strip lies in the longitudinal axis of the lamp, these vibrations take place transversely to the lamp axis, which worsens the optical properties.

Der Erfindung liegt die Aufgabe zugrunde, den Aufbau des Haltegestells weiter zu vereinfachen. Diese Aufgabe wird durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst.The invention has for its object to further simplify the structure of the support frame. This object is achieved by the characterizing features of claim 1.

Weitere Ausbildungen der Erfindungen, die besonders vorteilhaft sind, finden sich in den Unteransprüchen.Further developments of the inventions that are particularly advantageous can be found in the subclaims.

Die mit der Erfindung erzielbaren Vorteile bestehen insbesondere darin, daß eine Reduzierung der Teile­ zahl des Haltegestells die Fertigung auf einem Ge­stellmontageautomaten erleichtert. Weiterhin wird das Problem der Wärmeausdehnung und der elektrischen Verbindung gleichzeitig gelöst und unerwünschte Schwingungen werden nahezu ohne Auslenkung aus der Lampenachse gedämpft.The advantages that can be achieved with the invention are, in particular, that a reduction of the parts Number of the support frame facilitates the production on a rack assembly machine. Furthermore, the problem of thermal expansion and the electrical connection is solved at the same time and undesirable vibrations are damped with almost no deflection from the lamp axis.

Ausführungsbeispiele der Erfindung sollen anhand von Zeichnungen im folgenden näher beschrieben werden.

  • Figur 1 zeigt eine Natriumhochdrucklampe mit Stanzteil
  • Figur 2 zeigt das Stanzteil in Vergrößerung
  • Figur 3 zeigt eine andere Ausführungsform des Gestell­aufbaus
  • Figur 4 zeigt eine Metallhalogenidentladungslampe (ohne Außenkolben)
Embodiments of the invention will be described in more detail below with reference to drawings.
  • Figure 1 shows a high pressure sodium lamp with stamped part
  • Figure 2 shows the stamped part in an enlargement
  • Figure 3 shows another embodiment of the frame structure
  • FIG. 4 shows a metal halide discharge lamp (without outer bulb)

Figur 1 zeigt eine Natriumhochdruckentladungslampe 1 mit einer Leistungsaufnahme von 150 W. Sie weist einen zylindrischen Außenkolben 2 aus Hartglas mit Schraub­sockel 3 auf. Am sockelfernen Ende des Außenkolbens ist ein Befestigungsnippel 4 für das Gestell 5 ausge­formt. Das Gestell weist zwei Zuführungsdrähte 6 auf, die voneinander isoliert mittels einer Tellerein­schmelzung 7 in den Außenkolben vakuumdicht einge­schmolzen sind und in üblicher Weise mit dem Sockel 3 verbunden sind. Die Stromzuführungen 6 sind dreiteilig gegliedert. Das sockelseitige Endstück ist aus Nickel, das Mittelstück (Bereich der Durchführung) aus Wolfram und das sockelferne Endstück aus Nickel mit 2 %igem Manganzusatz oder nickelplattiertem Eisen gefertigt.FIG. 1 shows a high-pressure sodium discharge lamp 1 with a power consumption of 150 W. It has a cylindrical outer bulb 2 made of tempered glass with a screw base 3. A fastening nipple 4 for the frame 5 is formed on the end of the outer bulb remote from the base. The frame has two feed wires 6, which are melted in a vacuum-tight manner in the outer bulb by means of a plate melting 7 and are connected to the base 3 in the usual way. The power supply lines 6 are divided into three parts. The base end piece is made of nickel, the middle piece (area of the bushing) made of tungsten and the base end piece made of nickel with 2% manganese additive or nickel-plated iron.

Im Innern des Außenkolbens, der auch elliptisch geformt sein kann, ist axial das Entladungsgefäß 8 aus durchscheinender Aluminiumoxid-Keramik angeordnet.In the interior of the outer bulb, which can also be elliptically shaped, the discharge vessel 8 made of translucent aluminum oxide ceramic is arranged axially.

Einer der Zuführungsdrähte 6a ist in an sich bekann­ter Weise über einen weiteren U-förmig abgewinkelten Leitungsdraht 9 (aus Nickel mit 2 %igem Manganzusatz oder nickelplattiertem Eisen) mit der als Niob-Rohr ausgebildeten Stromzuführung 10a für die untere, d.h. sockelnahe Elektrode 11 des Entladungsgefäßes verbun­den. Um eine sichere Verbindung zu gewährleisten, ist dabei der Zuführungsdraht 6a im 45°-Winkel so abge­winkelt, daß er an dem Leitungsdraht 9 an zwei Berührungspunkten verschweißt werden kann. Das sockel­nahe Ende des Entladungsgefäßes 8 ist somit starr in der Lampenachse gehaltert. Die Stromzuführung ist jeweils mittels eines keramischen Endstopfens vakuum­dicht in das Entladungsgefäß eingepaßt.One of the supply wires 6a is connected in a manner known per se via a further U-shaped angled lead wire 9 (made of nickel with 2% manganese addition or nickel-plated iron) with the current lead 10a designed as a niobium tube for the lower, i.e. near the base electrode 11 of the discharge vessel connected. In order to ensure a secure connection, the feed wire 6a is angled at a 45 ° angle so that it can be welded to the lead wire 9 at two points of contact. The end of the discharge vessel 8 near the base is thus rigidly held in the lamp axis. The power supply is fitted in a vacuum-tight manner into the discharge vessel by means of a ceramic end plug.

Der zweite Zuführungsdraht 6b ist in ebenfalls bekann­ter Weise mit einem Metallstützstab 12 verbunden, welcher parallel zum Entladungsgefäß 8 zum sockel­fernen Ende des Außenkolbens 2 geführt ist. Der Zu­führungsdraht 6b ist ebenfalls im 45°-Winkel abge­winkelt und mit dem Metallstützstab 12, der ein recht­winklig abgebogenes Endteil aufweist, an zwei Be­rührungspunkten verschweißt. Das sockelferne Ende des Metallstützstabs 12 ist quer zur Lampenachse abge­winkelt und zu einem Teilkreis 13 gebogen, der den Befestigungsnippel 4 halternd umfaßt. In einer anderen Ausführungsform ohne Nippel ist der Durchmesser des Teilkreises so gewählt, daß er innen am sockelfernen Ende des Außenkolbens anliegt. Der Stützstab ist aus Nickel mit einem 2 %igen Manganzusatz oder aus nickelplattiertem Eisen gefertigt.The second feed wire 6b is also connected in a known manner to a metal support rod 12 which is guided parallel to the discharge vessel 8 to the end of the outer bulb 2 remote from the base. The feed wire 6b is also angled at a 45 ° angle and welded to the metal support rod 12, which has an end part bent at a right angle, at two points of contact. The end of the metal support rod 12 which is remote from the base is angled transversely to the lamp axis and is bent into a pitch circle 13 which includes the fastening nipple 4 as a holder. In another embodiment without a nipple, the diameter of the pitch circle is selected such that it lies against the end of the outer bulb remote from the base. The support rod is made of nickel with a 2% manganese additive or of nickel-plated iron.

Die sockelferne Elektrode 14 des Entladungsgefäßes 8 ist über eine als Niob-Rohr ausgebildete sockelferne Stromzuführung 10b mit einem Blattfeder-Stanzteil 15 aus Edelstahl verbunden. Die Ebene des Stanzteils 15 ist dabei senkrecht zur Lampenachse angeordnet. Das Stanzteil 15 ist direkt mit dem Stützstab 12 des Gestells 5 über eine abgewinkelte Schweißplatte 16 durch Buckelschweißung verbunden. Die Schweißplatte weist hierzu drei Sicken (Buckel) auf.The electrode 14 of the discharge vessel 8, which is remote from the base, is connected to a leaf spring stamped part 15 made of stainless steel via a base supply lead 10b which is formed as a niobium tube. The plane of the stamped part 15 is arranged perpendicular to the lamp axis. The stamped part 15 is connected directly to the support rod 12 of the frame 5 via an angled welding plate 16 by projection welding. For this purpose, the welding plate has three beads (humps).

Das Stanzteil 15 selbst ist in Figur 2 in Vergrößerung von oben dargestellt. Es besteht im wesentlichen aus einem stabilisierenden äußeren Rahmenteil 17 und einem innen angeordneten Zwischenteil 18. Das äußere Rahmen­teil 17 wird von zwei Armen 19 gebildet, die gemeinsam an einer Seite eines plättchenartigen Ansatzstücks 21 angeformt sind, sich aufweiten und in zwei zueinander parallelen Abschnitten 20 enden. Das Ansatzstück 21 weist zur Montage am Gestell außerdem an einer anderen Seite die um 90° abgewinkelte Schweißplatte 16 auf. Die beiden Endabschnitte 20 sind mäanderförmig um 180° in Richtung zum Ansatzstück 21 zurückgeführt und über das Zwischenteil 18 miteinander verbunden. Das Zwischenteil 18 weist ein plättchenartiges Befesti­gungselement 22 auf, das mit einer zentralen Bohrung 23 versehen ist. Die Bohrung 23 ist in der eingebauten Lampe genau in der Lampenachse angeordnet (Fig. 1.). Sie ermöglich das Evakuieren des zentral aufge­schweißten Nb-Rohres beim Pumpprozeß der Lampen. Die Befestigung der oberen Stromzuführung 10b am Befesti­gungselement 22 erfolgt wiederum mittels Buckelschwei­ßung, wobei das Befestigungselement 22 drei von der Mitte ausgehende Sicken (Buckel) 27 (in Fig. 2 erkenn­bar) zum besseren Verschweißen des Nb-Rohres mit dem Zwischenteil aufweist.The stamped part 15 itself is shown in an enlarged view from above in FIG. It essentially consists of a stabilizing outer frame part 17 and an intermediate part 18 arranged inside. The outer frame part 17 is formed by two arms 19, which are integrally formed on one side of a plate-like extension 21, expand and end in two mutually parallel sections 20 . The attachment piece 21 also has the welding plate 16 angled by 90 ° on another side for mounting on the frame. The two end sections 20 are led back in a meandering shape by 180 ° in the direction of the extension piece 21 and connected to one another via the intermediate part 18. The intermediate part 18 has a plate-like fastening element 22, which is provided with a central bore 23. The bore 23 is arranged exactly in the lamp axis in the built-in lamp (FIG. 1). It enables the centrally welded Nb tube to be evacuated during the pumping process of the lamps. The upper power supply line 10b is in turn attached to the fastening element 22 by means of projection welding, the fastening element 22 having three beads (projection) 27 (visible in FIG. 2) starting from the center for better welding of the Nb tube to the intermediate part.

Alle Elemente des Stanzteils 15, außer der abgewinkel­ten Schweißplatte 16, liegen in einer Ebene. Im Lampenbetrieb dehnt sich das keramische Entladungs­gefäß 8 entlang der Lampenachse in Richtung zum Be­festigungsnippel 4 aus. Das Blattfeder-Stanzteil 15 kann dieser Ausdehnung folgen.All elements of the stamped part 15, except for the angled welding plate 16, lie in one plane. During lamp operation, the ceramic discharge vessel 8 expands along the lamp axis in the direction of the fastening nipple 4. The leaf spring stamped part 15 can follow this expansion.

Man kann als Verbindungselement zwischen oberer Strom­zuführung 10b und Stützstab 12 auch ein einfaches Blattfeder-Bandstück verwenden, das in einer Ebene senkrecht zur Lampenachse angeordnet ist und eine abgewinkelte Schweißplatte (s.o.) aufweist. Bei dieser Ausführungsform ist jedoch die Entfernung h1 zwischen der als Fixpunkt wirkenden Schweißplatte am Stützstab und dem entlang der Lampenachse sich ausdehnenden Entladungsgefäß relativ groß. Dieser lange "Hebelweg" h1 (in Fig. 2) hat im Vergleich zur bevorzugten Ausführungsform des Blattfeder-Teils als Stanzteil zwei Nachteile. Erstens führt er zu einem schlechteren Dämpfungsverhalten bei Schwingungen und zweitens kann bei sehr hohen Temperaturen und entsprechend großer Ausdehnung eine geringfügige seitliche Auslenkung des oberen Endes des Entladungsgefäßes stattfinden.You can also use a simple leaf spring band piece as a connecting element between the upper power supply 10b and support rod 12, which is arranged in a plane perpendicular to the lamp axis and has an angled welding plate (see above). In this embodiment, however, the distance h1 between the welding plate acting as a fixed point on the support rod and the discharge vessel expanding along the lamp axis is relatively large. This long "lever travel" h1 (in FIG. 2) has two disadvantages in comparison to the preferred embodiment of the leaf spring part as a stamped part. Firstly, it leads to poorer damping behavior in the case of vibrations, and secondly, at very high temperatures and a correspondingly large expansion, there can be a slight lateral deflection of the upper end of the discharge vessel.

Bei der bevorzugten Ausführung als Stanzteil, wie oben beschrieben, wird der "Hebelweg" durch das stabile Rahmenteil gleichsam verkürzt und im wesentlichen federt nur das Zwischenteil gegen das Rahmenteil. Als "Hebelweg" ist dabei nur die etwa halb so lange Strecke h2 (Fig. 2) zwischen der 180°-Biegung am End­abschnitt 20 und der Bohrung 23 aufzufassen. Der kürzere Hebelweg verbessert die Dämpfungseigenschaf­ten. Außerdem wird die seitliche Auslenkung des Ent­ladungsgefäßes minimiert. Die Strecke h1 ist bei diesem Ausführungsbeispiel etwa 17 mm lang, die Strecke h2 ca. 9 mm lang.In the preferred embodiment as a stamped part, as described above, the "lever path" is quasi shortened by the stable frame part and essentially only the intermediate part springs against the frame part. Only about half the distance h2 (FIG. 2) between the 180 ° bend at the end section 20 and the bore 23 is to be understood as a "lever path". The shorter lever travel improves the damping properties. In addition, the lateral deflection of the discharge vessel is minimized. The distance h1 is at this exemplary embodiment about 17 mm long, the distance h2 about 9 mm long.

Das Blattfeder-Stanzteil ermöglicht eine sichere elektrische Verbindung zwischen der oberen Stromzu­führung und dem Stützstab des Haltegestells (über die Schweißplatte 16 und über die Schweißsicken 27 in der Nähe der Bohrung 23). Gleichzeitig kann es der Wärmeausdehnung des Entladungsgefäßes im Betrieb folgen (ca. 1 mm) und dämpft unerwünschte Schwingungen.The leaf spring stamped part enables a secure electrical connection between the upper power supply and the support rod of the holding frame (via the welding plate 16 and via the welding beads 27 in the vicinity of the bore 23). At the same time, it can follow the thermal expansion of the discharge vessel during operation (approx. 1 mm) and dampens unwanted vibrations.

Figur 3 zeigt eine andere Ausführungsform des Halte­gestells der Natriumhochdrucklampe. Die Bezugszeichen entsprechen in ihrer Bedeutung der Figur 1. Im Unter­schied zur Figur 1 ist jetzt nicht nur die obere Stromzuführung 10b, sondern auch die untere Stromzu­führung 10a über ein Blattfederstanzteil 15 mit dem Haltegestell 5 verbunden. Die Schweißplatte 16 des zusätzlichen Stanzteils 15 ist dabei direkt mit dem ersten Zuführungsdraht 6a verbunden.Figure 3 shows another embodiment of the support frame of the high pressure sodium lamp. The meaning of the reference numerals corresponds to that of FIG. 1. In contrast to FIG. 1, not only the upper power supply 10b but also the lower power supply 10a are now connected to the holding frame 5 via a leaf spring stamped part 15. The welding plate 16 of the additional stamped part 15 is connected directly to the first feed wire 6a.

Eine andere Ausführung ist in Figur 4 gezeigt. Dabei handelt es sich um eine an sich bekannte Metall­halogenidhochdruckentladungslampe mit Außenkolben (nicht gezeigt) und mit einem axial angeordneten Entladungsgefäß 24 aus Quarzglas, das an seinen beiden Enden Quetschdichtungen aufweist, in die Stromzu­führungen 25a, b aus Molybdändraht vacuumdicht ein­geschmolzen sind. Derartige Lampen sind beispielsweise in der EP-OS 173 235 und in der EP-OS 145 072 beschrieben. Erfindungsgemäß ist die obere Stromzu­führung 25b mit dem Stützstab 12 des Haltegestells 5 wieder über ein Blattfeder-Stanzteil 15′ verbunden. Es entspricht im wesentlichen wieder der in Figur 2 gezeigten Ausführungsform. Aufgrund des im Vergleich zum Niob-Rohr (Durchmesser 3,5 mm) wesentlich kleineren Durchmessers des Molybdändrahtes (ca. 0,8 bis 1,0 mm) ist jedoch das Befestigungselement 22′ mit einer um 90° abgewinkelten Schweißplatte 26 ausge­stattet, an dem die Stromzuführung 25b befestigt ist. Die Schweißplatte 26 ähnelt der gestellseitigen Schweißplatte 16′ . Diese Art der Befestigung läßt sich auch bei Natriumhochdrucklampen verwenden, die anstatt einer rohrartigen Stromzuführung eine Strom­zuführung aus Draht aufweisen (vgl. z.B. EP-OS 160 445). Im Außenkolben kann ein Getterring und/oder ein Getterpellet angebracht sein.Another embodiment is shown in FIG. 4. This is a metal halide high-pressure discharge lamp known per se with an outer bulb (not shown) and with an axially arranged discharge vessel 24 made of quartz glass, which has pinch seals at both ends into which current leads 25a, b made of molybdenum wire are melted in a vacuum-tight manner. Such lamps are described for example in EP-OS 173 235 and in EP-OS 145 072. According to the upper power supply 25b is connected to the support rod 12 of the holding frame 5 again via a leaf spring stamped part 15 '. It essentially corresponds again to the embodiment shown in FIG. Due to the significantly smaller diameter of the molybdenum wire (approx. 0.8 to 1.0 mm) compared to the niobium tube (diameter 3.5 mm), however, the fastening element 22 'is equipped with a welding plate 26 angled by 90 °, on which the power supply 25b is attached. The welding plate 26 is similar to the frame-side welding plate 16 '. This type of attachment can also be used in high-pressure sodium lamps which have a wire power supply instead of a tubular power supply (see, for example, EP-OS 160 445). A getter ring and / or a getter pellet can be attached in the outer bulb.

Claims (8)

1. Hochdruckentladungslampe (1), bestehend aus - einem Außenkolben (2) aus Glas
- einem rohrförmigen Entladungsgefäß (8) aus durch­sichtigem Material, das zwei axial ausgerichtete Elektroden (11, 14) und eine Gasfüllung enthält - einem Sockel (3)
- einem Haltegestell (5), das das Entladungsgefäß (8) im Inneren des Außenkolbens (2) in axialer Richtung hält, und das im wesentlichen zwei vakuumdicht in den Außenkolben (2) eingeschmolzene Zuführungsdrähte (6a, 6b) aufweist, von denen einer mit einem paral­lel zum Entladungsgefäß (8) ausgerichteten Metall­stützstab (12) elektrisch-leitend verbunden ist, wobei der Stab (12) am sockelfernen Ende des Außen­kolbens befestigt ist
- zwei axial aus dem Entladungsgefäß (8) herausge­führte Stromzuführungen (10a, 10b), die mit dem Haltegestell (5) elektrisch-leitend verbunden sind, dadurch gekennzeichnet, daß zumindest die sockelfern angeordnete Stromzuführung (10b) über ein im wesent­lichen ebenes Blattfeder-Teil mit dem Haltegestell (5) elektrisch-leitend und mechanisch-starr verbunden ist, wobei die Ebene des Blattfeder-Teils senkrecht zur Lampenachse angeordnet ist.1. High-pressure discharge lamp (1), consisting of - an outer bulb (2) made of glass
- a tubular discharge vessel (8) made of transparent material, which contains two axially aligned electrodes (11, 14) and a gas filling - a base (3)
- A holding frame (5) which holds the discharge vessel (8) in the interior of the outer bulb (2) in the axial direction, and which essentially has two supply wires (6a, 6b) melted in a vacuum-tight manner in the outer bulb (2), one of which with a metal support rod (12) aligned parallel to the discharge vessel (8) is electrically conductively connected, the rod (12) being fastened to the end of the outer bulb remote from the base
- Two axially from the discharge vessel (8) lead out current leads (10a, 10b), which are electrically conductively connected to the holding frame (5), characterized in that at least the power supply (10b) arranged remote from the base via an essentially flat leaf spring part is connected to the holding frame (5) in an electrically conductive and mechanically rigid manner, the plane of the leaf spring part being arranged perpendicular to the lamp axis. 2. Hochdruckentladungslampe nach Anspruch 1, dadurch gekennzeichnet, daß das Blattfeder-Teil ein Stanzteil (15) mit einem stabilisierenden äußeren Rahmenteil (17) und einem dagegenfedernden inneren Zwischenteil (18) ist.2. High-pressure discharge lamp according to claim 1, characterized in that the leaf spring part is a stamped part (15) with a stabilizing outer frame part (17) and a resilient inner intermediate part (18). 3. Hochdruckentladungslampe nach Anspruch 2, dadurch gekennzeichnet, daß das Stanzteil (15) ein plätt­chenartiges Ansatzstück (21) zur Montage am Halte­gestell (5) aufweist, an das zwei Arme (19) angeformt sind, die das äußere Rahmenteil (17) bilden.3. High-pressure discharge lamp according to claim 2, characterized in that the stamped part (15) has a plate-like extension (21) for mounting on the holding frame (5), on which two arms (19) are formed, which form the outer frame part (17). 4. Hochdruckentladungslampe nach Anspruch 3, dadurch gekennzeichnet, daß die beiden Arme (19) in zwei zueinander parallelen Abschnitten (20) enden, die über ein mäanderförmig gebogenes Zwischenteil (18) mit­einander verbunden sind.4. High-pressure discharge lamp according to claim 3, characterized in that the two arms (19) end in two mutually parallel sections (20) which are connected to one another via a meandering curved intermediate part (18). 5. Hochdruckentladungslampe nach Anspruch 2, dadurch gekennzeichnet, daß an das Zwischenteil (18) ein plättchenartiges Befestigungselement (22) zur Montage der sockelfernen Stromzuführung (10b) angeformt ist.5. High-pressure discharge lamp according to claim 2, characterized in that a plate-like fastening element (22) for mounting the power supply (10b) remote from the base is integrally formed on the intermediate part (18). 6. Hochdruckentladungslampe nach Anspruch 4, dadurch gekennzeichnet, daß das Befestigungselement (22) mit einer zentralen Bohrung (23) versehen ist, die in der Lampenachse liegt.6. High-pressure discharge lamp according to claim 4, characterized in that the fastening element (22) is provided with a central bore (23) which lies in the lamp axis. 7. Hochdruckentladungslampe nach Anspruch 1, dadurch gekennzeichnet, daß beide Stromzuführungen (10a, 10b) über ein Blattfeder-Teil mit dem Haltegestell (5) verbunden sind.7. High-pressure discharge lamp according to claim 1, characterized in that both power supply lines (10a, 10b) are connected to the holding frame (5) via a leaf spring part. 8. Hochdruckentladungslampe nach Anspruch 3, dadurch gekennzeichnet, daß der Abstand h2 zwischen dem freien Ende der Endabschnitte (20) und der Lampenachse etwa halb so groß ist wie der Abstand h1 zwischen Lampen­achse und Ansatzstück (21).8. High-pressure discharge lamp according to claim 3, characterized in that the distance h2 between the free end of the end sections (20) and the lamp axis is approximately half as large as the distance h1 between the lamp axis and extension (21).
EP88117682A 1987-11-17 1988-10-24 High pressure discharge lamp Expired - Lifetime EP0316617B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873739008 DE3739008A1 (en) 1987-11-17 1987-11-17 HIGH PRESSURE DISCHARGE LAMP
DE3739008 1987-11-17

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EP0316617A2 true EP0316617A2 (en) 1989-05-24
EP0316617A3 EP0316617A3 (en) 1990-08-22
EP0316617B1 EP0316617B1 (en) 1993-05-26

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US (1) US4924133A (en)
EP (1) EP0316617B1 (en)
DE (2) DE3739008A1 (en)

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WO1991009415A1 (en) * 1989-12-20 1991-06-27 Gte Products Corporation Mechanical support and electrical connector for a gas discharge lamp
EP0615276A1 (en) * 1993-03-09 1994-09-14 Koninklijke Philips Electronics N.V. Dual arc tube discharge lamp with simplified lamp frame
EP0890976A2 (en) * 1997-07-08 1999-01-13 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH High pressure discharge lamp
DE202009013109U1 (en) 2009-09-30 2010-12-30 Osram Gesellschaft mit beschränkter Haftung High pressure discharge lamp with ignition aid
WO2011018326A1 (en) 2009-08-14 2011-02-17 Osram Gesellschaft mit beschränkter Haftung High-pressure discharge lamp having an ignition aid

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DE8908561U1 (en) * 1989-07-13 1989-09-21 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München High pressure discharge lamp
US5173632A (en) * 1991-02-26 1992-12-22 Gte Products Corporation High pressure sodium arc discharge lamp with weldless arc tube support member
ATE369619T1 (en) * 1997-12-29 2007-08-15 Povl Kaas LAMP
DE29817633U1 (en) * 1998-10-02 2000-02-17 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Electric lamp with a base on one side
GB2362257B (en) * 2000-03-24 2005-01-05 Advanced Lighting Tech Inc System for supporting arc tubes in HID lamps
EP1292966A1 (en) * 2000-06-07 2003-03-19 Koninklijke Philips Electronics N.V. High-pressure discharge lamp
US6844676B2 (en) * 2001-10-01 2005-01-18 Koninklijke Philips Electronics N.V. Ceramic HID lamp with special frame wire for stabilizing the arc
US6949871B2 (en) * 2002-06-24 2005-09-27 Koninklijke Philips Electronics N.V. Metal halide lamp with improved field wire
JP4569928B2 (en) * 2006-05-31 2010-10-27 パナソニック株式会社 Metal vapor discharge lamp and lighting device

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GB759907A (en) * 1953-06-11 1956-10-24 British Thomson Houston Co Ltd Improvements relating to electric discharge lamps having double walled envelopes

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991009415A1 (en) * 1989-12-20 1991-06-27 Gte Products Corporation Mechanical support and electrical connector for a gas discharge lamp
EP0615276A1 (en) * 1993-03-09 1994-09-14 Koninklijke Philips Electronics N.V. Dual arc tube discharge lamp with simplified lamp frame
EP0890976A2 (en) * 1997-07-08 1999-01-13 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH High pressure discharge lamp
EP0890976A3 (en) * 1997-07-08 1999-04-14 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH High pressure discharge lamp
WO2011018326A1 (en) 2009-08-14 2011-02-17 Osram Gesellschaft mit beschränkter Haftung High-pressure discharge lamp having an ignition aid
DE212010000115U1 (en) 2009-08-14 2012-04-05 Osram Ag High pressure discharge lamp with ignition aid
DE202009013109U1 (en) 2009-09-30 2010-12-30 Osram Gesellschaft mit beschränkter Haftung High pressure discharge lamp with ignition aid

Also Published As

Publication number Publication date
DE3881342D1 (en) 1993-07-01
EP0316617A3 (en) 1990-08-22
EP0316617B1 (en) 1993-05-26
US4924133A (en) 1990-05-08
DE3739008A1 (en) 1989-05-24

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