EP0401637B1 - Electric lamp - Google Patents

Electric lamp Download PDF

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Publication number
EP0401637B1
EP0401637B1 EP90110082A EP90110082A EP0401637B1 EP 0401637 B1 EP0401637 B1 EP 0401637B1 EP 90110082 A EP90110082 A EP 90110082A EP 90110082 A EP90110082 A EP 90110082A EP 0401637 B1 EP0401637 B1 EP 0401637B1
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EP
European Patent Office
Prior art keywords
base
bulb
face
lamp according
lugs
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.)
Expired - Lifetime
Application number
EP90110082A
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German (de)
French (fr)
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EP0401637A3 (en
EP0401637A2 (en
Inventor
Fritz Eckhardt
Peter Helbig
Walter Schönherr
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Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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Publication of EP0401637A2 publication Critical patent/EP0401637A2/en
Publication of EP0401637A3 publication Critical patent/EP0401637A3/en
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Publication of EP0401637B1 publication Critical patent/EP0401637B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/42—Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp
    • H01K1/46—Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp supported by a separate part, e.g. base, cap

Definitions

  • the invention relates to an electric lamp according to the preamble of claim 1.
  • These can be both incandescent lamps and discharge lamps, which are preferably used in motor vehicles.
  • Known lamps of this type use, for example, a one-piece base in which the base stone is made of plastic (DE-GM 82 01 526).
  • the contact lugs are angled by 90 ° at the end of the base stone remote from the piston and, with their angled ends, form the welding lugs for the power supply lines.
  • a motor vehicle lamp with a two-part base is known from DE-GM 81 04 771, in which the base stone is made of ceramic.
  • the contact flag is fastened in the base stone by means of narrow, compressed areas, which however leave a lot of play.
  • the object of the invention is to provide a lamp which is particularly simple and reliable connection between the contact lugs and the base part holding them. This object is achieved by the characterizing features of claim 1. Further advantageous embodiments of the invention can be found in the dependent claims directed thereon.
  • a particular advantage of the invention is that the connection is gentle on the material and can be produced quickly.
  • a secure and play-free attachment of the contact lug to the base stone is achieved, which takes into account the large tolerances in dimensions that can occur in particular with ceramic parts.
  • the contact lug which has a counter bearing due to the welding eye, is "tightened" by turning towards the bevel.
  • the invention is applicable to a variety of different types of lamps. It is suitable for incandescent lamps, in particular halogen incandescent lamps, with one or more lamps, in which, for example, the lamp bulb is connected to a metallic base sleeve by a holding element.
  • the base sleeve has the shape of a hollow cylinder into which a ceramic base stone is fitted as a full cylinder (DE-GM 89 02 247).
  • the invention can also be used with discharge lamps, such as that shown in FIG. 3 EP-OS 231 936 are described.
  • the base has an approximately cup-shaped base part made of plastic, in the thickened bottom of which the contact tabs are fastened.
  • the base part holding the contact lugs can also have a different shape, for example cuboid. It is essential that it is a solid body which offers the possibility of a stop on the end surface remote from the piston and which has a possibility of entanglement on the end surface near the piston. It is also possible to reverse the functional assignment.
  • the welding lug is bent out of the center of the flesh of the stamping sheet, while narrow supports continue on both sides to the end of the contact lug near the piston.
  • the end forms a narrow arch or a bridge, which is interrupted by a slot in the middle.
  • the bow halves can have a constant height. But they are advantageously bevelled so that their height on the underside (facing the welding eye) increases towards the free end. This creates a clear stopping point when the arch halves are interlaced on the base stone, since only the lower edge of the free end lies against the slope of the base stone.
  • the underside of the arch half abuts the support at an acute angle. However, this corner can also be bulged, which makes it easier to turn the bow halves.
  • the invention is suitable for lamps with a one-part or multi-part base, preferably a two-part base. It can be connected to the lamp bulb directly or via a holding element.
  • the lamp bulb can be pinched on one or two sides.
  • the base part holding the contact tab can, for example, be made of plastic, ceramic or micaver.
  • the connection between the contact flag and the base stone described here is of particular importance if the base stone is made of ceramic, since ceramic parts have a considerably higher tolerance (approx.0.4 mm) than parts made of plastic (typical tolerance approx.0.05 mm) ).
  • ceramic components are sensitive to impact loads, which is why protecting the material is of particular importance here.
  • the lamp is manufactured in such a way that first the base sleeve and the lamp bulb with the luminous element or the electrodes are adjusted and fastened to one another via a holding element. Only then is the base stone, which is already fitted with the contact elements, inserted from below into the base sleeve and the tabs on the base sleeve are angled.
  • This process flow has the advantage that lamps in which a misalignment is found during ongoing quality control can be rejected before the base stone is installed. This makes it possible to disassemble and reassemble these lamps. In this way, the additional consumption can be reduced.
  • a halogen incandescent lamp with a power of 50 W shown schematically in FIGS. 1 and 2 is a lamp of the so-called type H7, which replaces the lamp of the so-called type H1 in certain applications.
  • these lamps serve as high and low beams in car headlights.
  • the cylindrical hard glass bulb 31, which is pinched on one side, is filled with inert gas and a halogen additive and with an axial helix 32 equipped. Two power leads 51 for the coil are melted into the pinch 33.
  • the pinch 33 of the piston is resiliently clamped in a one-piece, approximately cup-shaped holding element 34 made of a copper alloy.
  • the cup base 35 which faces the piston, has a double-T-shaped slot in which the pinch 33 is fitted.
  • Four bumps 36 on the cup base 35 serve as a stop on which four projections 30, which are formed on the side of the pinch 33, rest.
  • the side wall of the cup-shaped holding element 34 is divided into three sections.
  • the first is a circular ring 37 which is directly adjacent to the bottom of the cup and surrounds the pinch 33 relatively closely.
  • the adjoining second section is a truncated cone 38, which in turn merges into the third section 39, again an axially parallel circular ring 39 with a larger diameter than the first circular ring.
  • the circular ring 39 has at its end remote from the piston four tongues 41 distributed uniformly over the circumference, which are separated from one another by generous free spaces 42.
  • the base sleeve 40 is an axially aligned hollow cylinder with a collar 43 which is bent outwards on the piston side over approximately half the height of the hollow cylinder.
  • the fragmentary circular ring 39 of the holding element lies on the outside of the collar 43 and is welded to it in a manner known per se.
  • an adjusting ring 44 is formed, which is placed approximately halfway up the hollow cylinder transversely to the lamp axis.
  • the entire base sleeve 40, including collar 43 and adjusting ring 44, is made in one piece from a cylindrical part using the pull-in process.
  • the base sleeve is designed so that the holding element can be welded from the outside and thus easily accessible. This eliminates annoying holes, such as when welding on the inside of the base sleeve.
  • the welding technology can be chosen arbitrarily (e.g. laser welding, resistance welding). The welding process, which requires a certain contact pressure of the individual parts, can no longer lead to any deformation and the associated misalignment of the lamp in the extremely stable configuration of the base sleeve and holding element.
  • the bottom 46a of the recess 46 runs parallel to the end face 47 in this exemplary embodiment.
  • the end 49 of the base sleeve remote from the piston rests on a radially outwardly projecting edge 50 of the base block, so that overall a backlash-free mounting of the base block in the base sleeve is achieved.
  • the base stone is designed as a solid cylinder.
  • the two power supply lines 51, which are led out of the pinch 33, are in two tapered, continuous openings 54, which are provided near the axis in the base stone 48, threaded and connected on the end surface 47 remote from the piston with the welding lugs 55 of two contact lugs 56.
  • the flat stamping bodies of the contact lugs 56 (FIGS.
  • the welding eye 55 is cut out of the flesh of the punch body, narrow supports 64 remaining in the plane of the punch body on both sides of the recess 69 of the eye.
  • the carriers 64 lead to the piston-side end 61 of the contact lug 56.
  • the end 61 of each contact lug 56 projecting from the end face 59 forms a narrow arc above the welding eye before installation in the base stone and is interrupted in the middle by a slot 65, so that two arc halves 62 be formed.
  • the underside 63 of each arch half 62 facing the welding eye is chamfered in such a way that the height of the arch half on its underside 63 increases towards the center of the contact lug (free end 66) (FIG. 3a).
  • the two bow halves 62 are rotated by a maximum of 90 ° in the direction of the bevel 60 (FIG. 1 or arrow in FIG. 3 b) and rest against the bottom edge 63 a of the free end 66 thereof.
  • the axis of rotation lies in the plane of the contact lug in Height of the carrier 64.
  • this exemplary embodiment is distinguished by a particularly low overall height of the lamp. It is 62 mm.
  • This very compact lamp particularly meets the requirements of automotive engineering (e.g. low wind resistance).
  • the low overall height is achieved through an optimized overall design of the base (including the holding element). It is also important to note the higher thermal load-bearing capacity of a ceramic base stone, which enables it to be closer to the piston than plastic materials.
  • the tolerance compensation required when using ceramics is realized by particularly space-saving measures, while at the same time the necessary high adjustment accuracy had to be considered.
  • FIG. 4 A further exemplary embodiment of a contact lug (before installation) is shown in FIG. 4. It essentially corresponds to the first exemplary embodiment, the same parts being designated by the same reference numbers.
  • the approach of the underside 63 of the arch halves 62 takes place on the inside of the carrier 64 in this case via a rounded recess 67. This ends on the carrier side in a bevel 68, through which the width of the carrier 64 is reduced to approximately one third of its length towards the end 61 near the piston. It decreases from 2 mm to 1.7 mm per beam.
  • the free ends 66 of the bow halves 62 forming the slot 65 are chamfered towards the welding eye in such a way that the slot 65 widens.
  • the stamping body of the contact lug 65 is ground at both ends 61 in such a way that the thickness of the stamping plate (0.8 mm) tapers in half.

Description

Die Erfindung geht aus von einer elektrischen Lampe nach dem Oberbegriff des Anspruchs 1.The invention relates to an electric lamp according to the preamble of claim 1.

Es kann sich dabei sowohl um Glühlampen als auch um Entladungslampen handeln, die vorzugsweise jeweils in Kraftfahrzeugen eingesetzt werden.These can be both incandescent lamps and discharge lamps, which are preferably used in motor vehicles.

Bekannte Lampen dieser Art verwenden beispielsweise einen einteiligen Sockel, bei dem der Sockelstein aus Kunststoff gefertigt ist (DE-GM 82 01 526). Die Kontaktfahnen sind am kolbenfernen Ende des Sockelsteins um 90° abgewinkelt und bilden mit ihren abgewinkelten Enden die Schweißösen für die Stromzuführungen.Known lamps of this type use, for example, a one-piece base in which the base stone is made of plastic (DE-GM 82 01 526). The contact lugs are angled by 90 ° at the end of the base stone remote from the piston and, with their angled ends, form the welding lugs for the power supply lines.

Aus dem DE-GM 81 04 771 ist eine Kfz-Lampe mit zweiteiligem Sockel bekannt, bei der der Sockelstein aus Keramik gefertigt ist. Die Befestigung der Kontaktfahne im Sockelstein erfolgt durch schmale gestauchte Bereiche, die jedoch viel Spiel lassen.A motor vehicle lamp with a two-part base is known from DE-GM 81 04 771, in which the base stone is made of ceramic. The contact flag is fastened in the base stone by means of narrow, compressed areas, which however leave a lot of play.

Aufgabe der Erfindung ist es, eine Lampe zu schaffen, die sich durch eine besonders einfache und zuverlässige Verbindung zwischen den Kontaktfahnen und dem sie halternden Sockelteil auszeichnet. Diese Aufgabe wird durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst. Weitere vorteilhafte Ausführungen der Erfindung finden sich in den darauf gerichteten abhängigen Ansprüchen.The object of the invention is to provide a lamp which is particularly simple and reliable connection between the contact lugs and the base part holding them. This object is achieved by the characterizing features of claim 1. Further advantageous embodiments of the invention can be found in the dependent claims directed thereon.

Ein besonderer Vorteil der Erfindung liegt darin, daß die Verbindung materialschonend und schnell herstellbar ist. Es wird eine sichere und spielfreie Befestigung der Kontaktfahne am Sockelstein erreicht, die den großen Toleranzen in den Abmessungen, die insbesondere bei Keramikteilen auftreten können, Rechnung trägt. Die Schräge des Sokkelsteins und die Verdrehung des kolbennahen Fahnenendes, insbesondere der Bogenhälften, schaffen zusammen einen Toleranzausgleich, wobei die Höhe des Auflagepunktes der Bogenhälften der Kontaktfahne an der Schräge je nach Drehwinkel individuell variiert. Die Kontaktfahne, die durch die Schweißöse ein Gegenlager hat, wird durch die Drehung zur Schräge hin "festgezogen".A particular advantage of the invention is that the connection is gentle on the material and can be produced quickly. A secure and play-free attachment of the contact lug to the base stone is achieved, which takes into account the large tolerances in dimensions that can occur in particular with ceramic parts. The slope of the Sokkelstein and the rotation of the piston near the flag end, especially the bow halves, together create a tolerance compensation, the height of the point of contact of the bow halves of the contact flag on the slope varies depending on the angle of rotation. The contact lug, which has a counter bearing due to the welding eye, is "tightened" by turning towards the bevel.

Die Erfindung ist bei einer Vielzahl unterschiedlicher Lampentypen anwendbar. Sie eignet sich für Glühlampen, insbesondere Halogenglühlampen, mit einem oder auch mehreren Leuchtkörpern, bei der beispielsweise der Lampenkolben durch ein Halteelement mit einer metallischen Sockelhülse verbunden ist. Die Sockelhülse hat die Gestalt eines Hohlzylinders, in den ein Sockelstein aus Keramik als Vollzylinder eingepaßt ist (DE-GM 89 02 247).The invention is applicable to a variety of different types of lamps. It is suitable for incandescent lamps, in particular halogen incandescent lamps, with one or more lamps, in which, for example, the lamp bulb is connected to a metallic base sleeve by a holding element. The base sleeve has the shape of a hollow cylinder into which a ceramic base stone is fitted as a full cylinder (DE-GM 89 02 247).

Andererseits ist die Erfindung auch bei Entladungslampen anwendbar, wie sie beispielsweise in Fig. 3 der EP-OS 231 936 beschrieben sind. Der Sockel weist ein in etwa topfförmiges Sockelteil aus Kunststoff auf, in dessen verdicktem Boden die Kontaktfahnen befestigt sind.On the other hand, the invention can also be used with discharge lamps, such as that shown in FIG. 3 EP-OS 231 936 are described. The base has an approximately cup-shaped base part made of plastic, in the thickened bottom of which the contact tabs are fastened.

Anstelle eines scheibenförmigen Bodens oder Vollzylinders kann der die Kontaktfahnen halternde Sockelteil auch eine andere Gestalt, beispielsweise quaderförmig, besitzen. Wesentlich ist, daß es sich um einen Vollkörper handelt, der an der kolbenfernen Endfläche die Möglichkeit für einen Anschlag bietet und der an der kolbennahen Endfläche eine Verschränkungsmöglichkeit besitzt. Möglich ist auch eine Umkehrung der funktionalen Zuordnung.Instead of a disc-shaped base or solid cylinder, the base part holding the contact lugs can also have a different shape, for example cuboid. It is essential that it is a solid body which offers the possibility of a stop on the end surface remote from the piston and which has a possibility of entanglement on the end surface near the piston. It is also possible to reverse the functional assignment.

Bei der erfindungsgemäßen Kontaktfahne ist die Schweißöse mittig aus dem Fleisch des Stanzblechs herausgebogen, während schmale Träger beidseitig zum kolbennahen Ende der Kontaktfahne weiterführen. Das Ende bildet einen schmalen Bogen oder eine Brücke, die in der Mitte durch einen Schlitz unterbrochen ist. Dadurch entstehen zwei Bogenhälften, deren freies Ende zunächst einander gegenübersteht. Die Bogenhälften können eine konstante Höhe aufweisen. Sie sind aber vorteilhaft so abgeschrägt, daß ihre Höhe an der Unterseite (zur Schweißöse gewandt) zum freien Ende hin zunimmt. Dadurch wird ein eindeutiger Haltepunkt beim Verschränken der Bogenhälften am Sockelstein geschaffen, da nur die Unterkante des freien Endes an der Schräge des Sockelsteins anliegt. Die Unterseite der Bogenhälfte stößt an den Träger in einem spitzen Winkel. Diese Ecke kann jedoch auch bauchig ausgespart sein, wodurch die Drehbarkeit der Bogenhälften erleichtert wird.In the case of the contact lug according to the invention, the welding lug is bent out of the center of the flesh of the stamping sheet, while narrow supports continue on both sides to the end of the contact lug near the piston. The end forms a narrow arch or a bridge, which is interrupted by a slot in the middle. This creates two bow halves, the free end of which initially faces each other. The bow halves can have a constant height. But they are advantageously bevelled so that their height on the underside (facing the welding eye) increases towards the free end. This creates a clear stopping point when the arch halves are interlaced on the base stone, since only the lower edge of the free end lies against the slope of the base stone. The underside of the arch half abuts the support at an acute angle. However, this corner can also be bulged, which makes it easier to turn the bow halves.

Allgemein eignet sich die Erfindung für Lampen mit ein- oder mehrteiligem Sockel, vorzugsweise zweiteiligem Sockel. Er kann direkt oder über ein Halteelement mit dem Lampenkolben verbunden sein. Der Lampenkolben kann ein- oder zweiseitig gequetscht sein. Der die Kontaktfahne halternde Sockelteil kann beispielsweise aus Kunststoff, Keramik oder Micaver gefertigt sein.
Die hier beschriebene Verbindung zwischen Kontaktfahne und Sockelstein ist von besonderer Bedeutung, wenn der Sockelstein aus Keramik gefertigt ist, da keramische Teile eine erheblich höhere Toleranz (ca. 0,4 mm) aufweisen als Teile aus Kunststoff (typische Toleranz ca. 0,05 mm). Außerdem reagieren keramische Bauteile empfindlich auf Stoßbelastung, weshalb hier die Materialschonung von besonderer Bedeutung ist. Mit Hilfe der neuen und einfachen Verbindungstechnik ist es daher möglich, die Vorteile von keramischen Sockelteilen auch für Lampen, die höchste Justiergenauigkeit erfordern, zu nützen: insbesondere wird bei Verwendung von Keramik das Ausdampfverhalten verbessert und die Temperatur wird durch die bessere Wärmeisolation abgesenkt.In general, the invention is suitable for lamps with a one-part or multi-part base, preferably a two-part base. It can be connected to the lamp bulb directly or via a holding element. The lamp bulb can be pinched on one or two sides. The base part holding the contact tab can, for example, be made of plastic, ceramic or micaver.
The connection between the contact flag and the base stone described here is of particular importance if the base stone is made of ceramic, since ceramic parts have a considerably higher tolerance (approx.0.4 mm) than parts made of plastic (typical tolerance approx.0.05 mm) ). In addition, ceramic components are sensitive to impact loads, which is why protecting the material is of particular importance here. With the help of the new and simple connection technology, it is therefore possible to use the advantages of ceramic base parts for lamps that require the highest level of adjustment accuracy: in particular, when using ceramic, the evaporation behavior is improved and the temperature is lowered thanks to better thermal insulation.

Die Herstellung der Lampe läuft so ab, daß zunächst die Sockelhülse und der Lampenkolben mit dem Leuchtkörper bzw. den Elektroden über ein Halteelement zueinander justiert und befestigt werden. Erst dann wird der Sockelstein, der bereits mit den Kontaktelementen bestückt ist, von unten in die Sockelhülse eingesetzt und die Laschen an der Sockelhülse werden abgewinkelt. Dieser Verfahrensablauf hat den Vorteil, daß Lampen, bei denen bei der laufenden Qualitätskontrolle eine Dejustierung festgestellt wird, bereits vor der Montage des Sockelsteins wieder ausgesondert werden können. Dadurch ist es möglich, diese Lampen wieder zu demontieren und neu zusammenzusetzen. Auf diese Weise kann der Mehrverbrauch gesenkt werden.The lamp is manufactured in such a way that first the base sleeve and the lamp bulb with the luminous element or the electrodes are adjusted and fastened to one another via a holding element. Only then is the base stone, which is already fitted with the contact elements, inserted from below into the base sleeve and the tabs on the base sleeve are angled. This process flow has the advantage that lamps in which a misalignment is found during ongoing quality control can be rejected before the base stone is installed. This makes it possible to disassemble and reassemble these lamps. In this way, the additional consumption can be reduced.

Zwei Ausführungsbeispiele der Erfindung sollen im folgenden näher erläutert werden. Es zeigt

Figur 1
ein Ausführungsbeispiel einer Halogenglühlampe für Autoscheinwerfer in Seitenansicht (Sockel geschnitten)
Figur 2
eine um 90° gedrehte Ansicht der Lampe aus Figur 1 (Sockel geschnitten)
Figur 3
eine Kontaktfahne der Lampe aus Figur 1 vor der Montage in Seitenansicht (Fig. 3a) und im Schnitt (Fig. 3b)
Figur 4
ein zweites Ausführungsbeispiel einer Kontaktfahne in Seitenansicht
Two embodiments of the invention will be explained in more detail below. It shows
Figure 1
an embodiment of a halogen light bulb for car headlights in side view (cut base)
Figure 2
a 90 ° rotated view of the lamp of Figure 1 (cut base)
Figure 3
a contact tab of the lamp of Figure 1 before assembly in side view (Fig. 3a) and in section (Fig. 3b)
Figure 4
a second embodiment of a contact tab in side view

Bei dem schematisch in Figur 1 und 2 gezeigten Ausführungsbeispiel einer Halogenglühlampe mit 50 W Leistung handelt es sich um eine Lampe des sog. Typs H7, die in bestimmten Anwendungen die Lampe des sog. Typs H1 ersetzt. Allgemein dienen diese Lampen als Fern- und Abblendlicht in Autoscheinwerfern. Der zylindrische, einseitig gequetschte Hartglaskolben 31 ist mit Inertgas und einem Halogenzusatz gefüllt und mit einer Axialwendel 32 bestückt. Zwei Stromzuführungen 51 für die Wendel sind in die Quetschung 33 eingeschmolzen.The exemplary embodiment of a halogen incandescent lamp with a power of 50 W shown schematically in FIGS. 1 and 2 is a lamp of the so-called type H7, which replaces the lamp of the so-called type H1 in certain applications. In general, these lamps serve as high and low beams in car headlights. The cylindrical hard glass bulb 31, which is pinched on one side, is filled with inert gas and a halogen additive and with an axial helix 32 equipped. Two power leads 51 for the coil are melted into the pinch 33.

Die Quetschung 33 des Kolbens ist in ein einteiliges, in etwa napfförmiges Halteelement 34 aus einer Kupferlegierung federnd eingespannt. Der Napfboden 35, der dem Kolben zugewandt ist, weist einen doppel-T-förmigen Schlitz auf, in dem die Quetschung 33 eingepaßt ist. Vier Höcker 36 auf dem Napfboden 35 dienen als Anschlag, auf dem vier Vorsprünge 30, die seitlich an der Quetschung 33 ausgebildet sind, aufliegen. Die Seitenwand des napfförmigen Halteelements 34 ist in drei Abschnitte gegliedert. Der erste ist ein Kreisring 37, der dem Napfboden direkt benachbart ist und die Quetschung 33 relativ eng umgibt. Der daran anschließende zweite Abschnitt ist ein Kegelstumpf 38, der seinerseits in den dritten Abschnitt 39 übergeht, einem wiederum achsparallelen Kreisring 39 mit im Vergleich zum ersten Kreisring größeren Durchmesser. Der Kreisring 39 besitzt an seinem kolbenfernen Ende vier gleichmäßig über den Umfang verteilte Zungen 41, die durch großzügige Freiräume 42 voneinander getrennt sind.
Die Sockelhülse 40 ist ein axial ausgerichteter Hohlzylinder mit einem Kragen 43, der kolbenseitig über etwa die halbe Höhe des Hohlzylinders nach außen zurückgebogen ist. Der fragmentarische Kreisring 39 des Halteelements liegt außen am Kragen 43 an und ist mit diesem in an sich bekannter Weise verschweißt. Am freien Ende des Kragens 43 ist ein Einstellring 44 ausgebildet, der etwa in halber Höhe des Hohlzylinders quer zur Lampenachse plaziert ist. Die gesamte Sockelhülse 40, einschließlich Kragen 43 und Einstellring 44, ist einstückig aus einem zylindrischen Teil im Stülpzugverfahren hergestellt.The pinch 33 of the piston is resiliently clamped in a one-piece, approximately cup-shaped holding element 34 made of a copper alloy. The cup base 35, which faces the piston, has a double-T-shaped slot in which the pinch 33 is fitted. Four bumps 36 on the cup base 35 serve as a stop on which four projections 30, which are formed on the side of the pinch 33, rest. The side wall of the cup-shaped holding element 34 is divided into three sections. The first is a circular ring 37 which is directly adjacent to the bottom of the cup and surrounds the pinch 33 relatively closely. The adjoining second section is a truncated cone 38, which in turn merges into the third section 39, again an axially parallel circular ring 39 with a larger diameter than the first circular ring. The circular ring 39 has at its end remote from the piston four tongues 41 distributed uniformly over the circumference, which are separated from one another by generous free spaces 42.
The base sleeve 40 is an axially aligned hollow cylinder with a collar 43 which is bent outwards on the piston side over approximately half the height of the hollow cylinder. The fragmentary circular ring 39 of the holding element lies on the outside of the collar 43 and is welded to it in a manner known per se. At the free end of the collar 43 an adjusting ring 44 is formed, which is placed approximately halfway up the hollow cylinder transversely to the lamp axis. The entire base sleeve 40, including collar 43 and adjusting ring 44, is made in one piece from a cylindrical part using the pull-in process.

Die Sockelhülse ist so gestaltet, daß das Halteelement von außen und damit leicht zugänglich verschweißt werden kann. Dadurch entfallen störende Löcher wie beim Verschweißen an der Innenseite der Sockelhülse. Die Schweißtechnik kann beliebig gewählt werden (z.B. Laserschweißen, Widerstandsschweißen). Der Schweißvorgang, der einen gewissen Anpreßdruck der Einzelteile erfordert, kann bei der äußerst stabilen Konfiguration von Sockelhülse und Halteelement zu keinerlei Deformation und damit verbundener Dejustierung der Lampe mehr führen.The base sleeve is designed so that the holding element can be welded from the outside and thus easily accessible. This eliminates annoying holes, such as when welding on the inside of the base sleeve. The welding technology can be chosen arbitrarily (e.g. laser welding, resistance welding). The welding process, which requires a certain contact pressure of the individual parts, can no longer lead to any deformation and the associated misalignment of the lamp in the extremely stable configuration of the base sleeve and holding element.

Am kolbenfernen Ende 49 des Hohlzylinders der Sockelhülse 40, das leicht nach innen gebogen ist, sind zwei einander gegenüberstehende, geradlinig nach innen abgebogene Laschen 45 angeformt, die in Vertiefungen 46 an der kolbenfernen Endfläche 47 eines keramischen Sockelsteins 48 (aus Steatit) eingepaßt sind.At the distal end 49 of the hollow cylinder of the base sleeve 40, which is slightly bent inward, two opposing, straight inwardly bent tabs 45 are formed, which are fitted into recesses 46 on the distal end surface 47 of a ceramic base stone 48 (made of steatite).

Der Boden 46a der Vertiefung 46 verläuft in diesem Ausführungsbeispiel parallel zur Endfläche 47. Das kolbenferne Ende 49 der Sockelhülse liegt an einem radial nach außen abstehenden Rand 50 des Sockelsteins auf, so daß insgesamt eine spielfreie Halterung des Sockelsteins in der Sockelhülse erzielt wird. Der Sockelstein ist als Vollzylinder gestaltet. Die beiden Stromzuführungen 51, die aus der Quetschung 33 herausgeführt sind, sind in zwei konisch zulaufenden, durchgehenden Öffnungen 54, die in Achsnähe im Sockelstein 48 angebracht sind, eingefädelt und an der kolbenfernen Endfläche 47 mit den Schweißösen 55 zweier Kontaktfahnen 56 verbunden. Die flachen Stanzkörper der Kontaktfahnen 56 (Fig. 3a und 3b) selbst sind in separaten Schlitzen 57 gehaltert, die den konisch zulaufenden Öffnungen 54 jeweils eng benachbart sind. Die kolbenferne Endfläche 47 des Sockelsteins besitzt zwei Mulden 58, in die jeweils eine konische Öffnung 54 und ein Schlitz 57 gemeinsam münden, wobei die Schweißöse 55 der Kontaktfahne, die um 90° gegen den Stanzkörper der Kontaktfahne abgewinkelt ist, am Boden der Mulde 58 aufliegt. Auf der dem Kolben zugewandten Endfläche 59 des Sockelsteins ist an der Mündung jedes Schlitzes 57 einseitig eine Schräge 60 ausgespart, die zur konischen Öffnung 54 hin ansteigt. Die Schweißöse 55 ist aus dem Fleisch des Stanzkörpers herausgeschnitten, wobei zu beiden Seiten der Aussparung 69 der Öse schmale Träger 64 in der Ebene des Stanzkörpers verbleiben. Die Träger 64 führen zum kolbenseitigen Ende 61 der Kontaktfahne 56. Das an der Endfläche 59 überstehende Ende 61 jeder Kontaktfahne 56 bildet vor dem Einbau in den Sockelstein einen schmalen Bogen über der Schweißöse und ist mittig durch einen Schlitz 65 unterbrochen, so daß zwei Bogenhälften 62 gebildet werden. Die zur Schweißöse gewandte Unterseite 63 jeder Bogenhälfte 62 ist so abgeschrägt, daß die Höhe der Bogenhälfte an ihrer Unterseite 63 zur Mitte der Kontaktfahne hin (freies Ende 66) zunimmt (Fig. 3a). Die beiden Bogenhälften 62 sind im eingebauten Zustand um maximal 90° in Richtung zur Schräge 60 verdreht (Fig. 1 bzw. Pfeil in Fig. 3 b) und liegen mit der Unterkante 63a des freien Endes 66 an dieser an. Die Drehachse liegt in der Ebene der Kontaktfahne in Höhe der Träger 64. Auf diese Weise wird eine sichere und spielfreie Befestigung der Kontaktfahne am keramischen Sockelstein erreicht, die den großen Toleranzen in den Abmessungen, die bei Keramikteilen auftreten können, Rechnung trägt. Die Schräge des Sockelsteins und die Verdrehung der Bogenhälften schaffen zusammen einen Toleranzausgleich, wobei die Höhe des Auflagepunktes der Bogenhälften der Kontaktfahne an der Schräge je nach Drehwinkel individuell variiert. Die Kontaktfahne, die durch die Schweißöse ein Gegenlager hat, wird durch die Drehung zur Schräge hin "festgezogen".The bottom 46a of the recess 46 runs parallel to the end face 47 in this exemplary embodiment. The end 49 of the base sleeve remote from the piston rests on a radially outwardly projecting edge 50 of the base block, so that overall a backlash-free mounting of the base block in the base sleeve is achieved. The base stone is designed as a solid cylinder. The two power supply lines 51, which are led out of the pinch 33, are in two tapered, continuous openings 54, which are provided near the axis in the base stone 48, threaded and connected on the end surface 47 remote from the piston with the welding lugs 55 of two contact lugs 56. The flat stamping bodies of the contact lugs 56 (FIGS. 3a and 3b) themselves are held in separate slots 57, which are each closely adjacent to the tapered openings 54. The end surface 47 of the base stone remote from the piston has two troughs 58, into each of which a conical opening 54 and a slot 57 open together, the welding lug 55 of the contact lug, which is angled by 90 ° against the punch body of the contact lug, resting on the bottom of the trough 58 . On the end face 59 of the base stone facing the piston, a bevel 60 is recessed on one side at the mouth of each slot 57 and rises towards the conical opening 54. The welding eye 55 is cut out of the flesh of the punch body, narrow supports 64 remaining in the plane of the punch body on both sides of the recess 69 of the eye. The carriers 64 lead to the piston-side end 61 of the contact lug 56. The end 61 of each contact lug 56 projecting from the end face 59 forms a narrow arc above the welding eye before installation in the base stone and is interrupted in the middle by a slot 65, so that two arc halves 62 be formed. The underside 63 of each arch half 62 facing the welding eye is chamfered in such a way that the height of the arch half on its underside 63 increases towards the center of the contact lug (free end 66) (FIG. 3a). In the installed state, the two bow halves 62 are rotated by a maximum of 90 ° in the direction of the bevel 60 (FIG. 1 or arrow in FIG. 3 b) and rest against the bottom edge 63 a of the free end 66 thereof. The axis of rotation lies in the plane of the contact lug in Height of the carrier 64. In this way, a secure and play-free attachment of the contact lug to the ceramic base stone is achieved, which takes into account the large tolerances in the dimensions that can occur with ceramic parts. The bevel of the base stone and the twisting of the arch halves together create a tolerance compensation, the height of the point of contact of the arch halves of the contact lug on the bevel varying individually depending on the angle of rotation. The contact lug, which has a counter bearing due to the welding eye, is "tightened" by turning towards the bevel.

Insgesamt zeichnet sich dieses Ausführungsbeispiel durch eine besonders geringe Bauhöhe der Lampe aus. Sie beträgt 62 mm. Diese sehr kompakte Lampe kommt den Anforderungen des Automobilbaus (z.B. geringer Windwiderstand) besonders entgegen. Die geringe Bauhöhe wird durch eine optimierte Gesamtkonzeption des Sockels (einschließlich Halteelement) erreicht. Hierbei ist auch auf die höhere thermische Belastbarkeit eines keramischen Sockelsteins hinzuweisen, die im Vergleich zu Kunststoffmaterialien eine größere Nähe zum Kolben ermöglicht. Der bei Verwendung von Keramik notwendige Toleranzausgleich wird durch besonders platzsparende Maßnahmen realisiert, wobei gleichzeitig die erforderliche hohe Justiergenauigkeit bedacht werden mußte.Overall, this exemplary embodiment is distinguished by a particularly low overall height of the lamp. It is 62 mm. This very compact lamp particularly meets the requirements of automotive engineering (e.g. low wind resistance). The low overall height is achieved through an optimized overall design of the base (including the holding element). It is also important to note the higher thermal load-bearing capacity of a ceramic base stone, which enables it to be closer to the piston than plastic materials. The tolerance compensation required when using ceramics is realized by particularly space-saving measures, while at the same time the necessary high adjustment accuracy had to be considered.

Ein weiteres Ausführungsbeispiel einer Kontaktfahne (vor dem Einbau) zeigt Fig. 4. Sie entspricht im wesentlichen dem ersten Ausführungsbeispiel, wobei gleiche Teile durch gleiche Bezugsziffern bezeichnet sind. Der Ansatz der Unterseite 63 der Bogenhälften 62 an der Innenseite der Träger 64 erfolgt dabei über eine abgerundete Aussparung 67. Diese mündet trägerseitig in eine Schräge 68, durch die die Breite der Träger 64 auf etwa einem Drittel ihrer Länge zum kolbennahen Ende 61 hin reduziert ist. Sie nimmt von 2 mm auf 1,7 mm pro Träger ab.A further exemplary embodiment of a contact lug (before installation) is shown in FIG. 4. It essentially corresponds to the first exemplary embodiment, the same parts being designated by the same reference numbers. The approach of the underside 63 of the arch halves 62 takes place on the inside of the carrier 64 in this case via a rounded recess 67. This ends on the carrier side in a bevel 68, through which the width of the carrier 64 is reduced to approximately one third of its length towards the end 61 near the piston. It decreases from 2 mm to 1.7 mm per beam.

Die den Schlitz 65 bildenden freien Enden 66 der Bogenhälften 62 sind zur Schweißöse hin so abgeschrägt, daß sich der Schlitz 65 erweitert. Der Stanzkörper der Kontaktfahne 65 ist an seinen beiden Enden 61 so angeschliffen, daß sich die Dicke des Stanzblechs (0,8 mm) auf die Hälfte verjüngt.The free ends 66 of the bow halves 62 forming the slot 65 are chamfered towards the welding eye in such a way that the slot 65 widens. The stamping body of the contact lug 65 is ground at both ends 61 in such a way that the thickness of the stamping plate (0.8 mm) tapers in half.

Claims (8)

  1. Electric lamp, comprising at least
    - a glass bulb (31) having a light-generating means (32),
    - current supply leads (51) brought out at the pinch (33),
    - a base which contains a base section made of insulating material (hereinafter referred to as base insulator (48)),
    - contact elements which are attached to the base insulator (48) and are connected in an electrically conducting manner to the current supply leads (51)
    characterized in that the base insulator (48) is a solid body having an end face (59) close to the bulb and an end face (47) remote from the bulb, the end face (59), close to the bulb, of the base insulator having sloping areas (60), and in that the contact elements are designed as lugs (56) which are anchored in the through longitudinal slots (57) on the base insulator, the lugs (56) having angled eyelet pieces (55) which rest against the end face (47), remote from the bulb, of the base insulator and the bulb-side end (61) of the lugs projecting at the bulb-side end face (59), being angled at that point and resting against the bulb-side end face (59) in a clamping fashion in the region of the sloping areas (60).
  2. Lamp according to Claim 1, characterized in that the eyelets have been cut out of the body of the contact lugs and the bulb-side end (61) of the lugs is slotted continuously up to the eyelet cutout (69).
  3. Lamp according to Claim 2, characterized in that the bulb-side end (61) of the contact lug (56) is formed into an arc which is centrally separated by a slot (65) and forms two arc halves (62) which have free ends and of which at least one is angled.
  4. Lamp according to one of the preceding claims, characterized in that the axis of rotation for the angling of the bulb-side end of the contact lugs lies in the plane of the contact lug.
  5. Lamp according to Claim 3, characterized in that the bottom side (63) of each arc half is inclined in such a way that the height of the arc half increases towards the free end (66) with the result that the bottom edge (63a) of the free end (66) rests against the sloping area (60) of the end face close to the bulb in a clamping fashion.
  6. Lamp according to Claim 1, characterized in that the base comprises a base insulator and a base sleeve (40) which forms a hollow cylinder, the base insulator (48) being fitted into the base sleeve (40) as solid cylinder.
  7. Lamp according to Claim 1 or 6, characterized in that the base insulator (48) is made of ceramic.
  8. Lamp according to Claim 1, characterized in that bulb (31) and base are joined by a retaining element (34).
EP90110082A 1989-06-09 1990-05-28 Electric lamp Expired - Lifetime EP0401637B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8907108U DE8907108U1 (en) 1989-06-09 1989-06-09
DE8907108U 1989-06-09

Publications (3)

Publication Number Publication Date
EP0401637A2 EP0401637A2 (en) 1990-12-12
EP0401637A3 EP0401637A3 (en) 1991-05-02
EP0401637B1 true EP0401637B1 (en) 1994-01-26

Family

ID=6839966

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90110082A Expired - Lifetime EP0401637B1 (en) 1989-06-09 1990-05-28 Electric lamp

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EP (1) EP0401637B1 (en)
JP (2) JP2503160Y2 (en)
KR (2) KR950010122Y1 (en)
DE (2) DE8907108U1 (en)
ES (1) ES2048360T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202004012293U1 (en) * 2004-08-05 2005-12-15 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Single ended lamp

Families Citing this family (10)

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Publication number Priority date Publication date Assignee Title
DE9011351U1 (en) * 1990-08-02 1990-10-25 Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh, 8000 Muenchen, De
US5227690A (en) * 1990-12-03 1993-07-13 U.S. Philips Corporation Capped electric lamp
EP0499316A1 (en) * 1991-02-15 1992-08-19 Koninklijke Philips Electronics N.V. Capped electric lamp
US5272409A (en) * 1991-06-03 1993-12-21 U.S. Philips Corporation Capped lamp/reflector unit
EP0533250A1 (en) * 1991-09-17 1993-03-24 Koninklijke Philips Electronics N.V. Capped electric lamp
DE59601558D1 (en) * 1996-01-11 1999-05-06 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh KITTLESS BASED ELECTRIC LAMP
DE20300699U1 (en) * 2003-01-16 2003-03-20 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Lamp base and lamp with a lamp base
ATE535934T1 (en) * 2008-02-29 2011-12-15 Koninkl Philips Electronics Nv LAMP HELMET AND METHOD FOR PRODUCING IT
DE102010002650B4 (en) * 2010-03-08 2012-11-22 Osram Ag Halogen bulb for vehicle headlights
KR102544818B1 (en) * 2021-02-17 2023-06-16 국방과학연구소 Chamber, manufacturing system and method for atomic vapor cell comprsing the same

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JPS5655742Y2 (en) * 1975-07-30 1981-12-25
DE3102434A1 (en) * 1981-01-26 1982-08-26 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München ELECTRIC BULB
DE3128346A1 (en) * 1981-07-17 1983-01-27 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München Method for producing an incandescent halogen lamp for motor vehicle headlights (headlamps)
DE3806978A1 (en) * 1988-03-03 1989-09-14 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh KITTLESS BASED ELECTRIC LAMP

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202004012293U1 (en) * 2004-08-05 2005-12-15 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Single ended lamp

Also Published As

Publication number Publication date
DE59004383D1 (en) 1994-03-10
KR960000559Y1 (en) 1996-01-17
EP0401637A3 (en) 1991-05-02
DE8907108U1 (en) 1989-08-10
JPH0313662U (en) 1991-02-12
JPH0312351U (en) 1991-02-07
KR910001602U (en) 1991-01-24
JP2503160Y2 (en) 1996-06-26
KR910001601U (en) 1991-01-24
KR950010122Y1 (en) 1995-11-27
ES2048360T3 (en) 1994-03-16
EP0401637A2 (en) 1990-12-12

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