EP0384240B1 - Electrical lamp capped without cement - Google Patents

Electrical lamp capped without cement Download PDF

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Publication number
EP0384240B1
EP0384240B1 EP90102595A EP90102595A EP0384240B1 EP 0384240 B1 EP0384240 B1 EP 0384240B1 EP 90102595 A EP90102595 A EP 90102595A EP 90102595 A EP90102595 A EP 90102595A EP 0384240 B1 EP0384240 B1 EP 0384240B1
Authority
EP
European Patent Office
Prior art keywords
cap
bulb
lamp according
clips
insulator
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
EP90102595A
Other languages
German (de)
French (fr)
Other versions
EP0384240A3 (en
EP0384240A2 (en
Inventor
Fritz Eckhardt
Peter Helbig
Walter Schönherr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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
Priority claimed from DE8902247U external-priority patent/DE8902247U1/de
Priority claimed from DE8907108U external-priority patent/DE8907108U1/de
Application filed by Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of EP0384240A2 publication Critical patent/EP0384240A2/en
Publication of EP0384240A3 publication Critical patent/EP0384240A3/en
Application granted granted Critical
Publication of EP0384240B1 publication Critical patent/EP0384240B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R33/00—Coupling devices specially adapted for supporting apparatus and having one part acting as a holder providing support and electrical connection via a counterpart which is structurally associated with the apparatus, e.g. lamp holders; Separate parts thereof
    • H01R33/05—Two-pole devices
    • H01R33/06—Two-pole devices with two current-carrying pins, blades or analogous contacts, having their axes parallel to each other
    • H01R33/09—Two-pole devices with two current-carrying pins, blades or analogous contacts, having their axes parallel to each other for baseless lamp bulb

Definitions

  • the invention is based on a lamp without a cement according to the preamble of claim 1.
  • Such lamps are particularly suitable for use in reflectors, in particular motor vehicle headlights.
  • Known lamps of this type use, for example, a two-part base, in which the base stone is made of plastic (DE-GM 82 01 536).
  • the metallic base sleeve is held in a receptacle of the base stone.
  • the base stone is very complicated and therefore difficult to manufacture.
  • 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 attachment between the two base parts is carried out by a rivet, which leaves a lot of play and also requires an additional part.
  • the optical quality of a headlight depends crucially on the quality of the attachment. As far as possible, it should not allow any play to avoid misalignment of the lamp with respect to the focus of the headlight.
  • the object of the invention is to provide a lamp with a two-part base, which is characterized by a particularly simple and play-free connection between the two base parts.
  • a particular advantage of the invention lies in the fact that the connection between the two base parts can be produced gently and quickly. It is also characterized by a high degree of adjustment accuracy, which is increasingly required, especially in modern headlights. Furthermore, this connection compensates for large tolerances of the base parts during assembly.
  • the tolerance compensation is carried out in an astonishingly simple manner by the tabs of the base sleeve being bent towards the base stone and thus being able to adapt to the individual dimensions of the base stone, the edge of a base part experiencing a fixed stop of a defined height at the end of the other base part facing it.
  • the metallic base sleeve can be manufactured with minimal tolerance.
  • the tabs just lie on the end face of the base stone.
  • the actual mounting of the base stone is achieved in the area of a 90 ° bend in the tabs.
  • Fixing the base stone in the base sleeve is facilitated if the end face of the base stone has a recess for the entire tab. This depression can be superimposed on the cutout for the tab end.
  • connection between the base stone and base sleeve 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.
  • plastic parts the formation of deposits on the reflector by expensive subsequent heating or washing must be avoided.
  • the simple type of connection also offers enough space on the base, so that both the use of round contacts and flat plugs (contact tabs) is made possible. This also opens up the possibility of producing a splash-proof design by an external potting.
  • the lamp is manufactured, for example, by first adjusting and fixing the base sleeve and the lamp bulb with the luminous element 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 procedure has the advantage that lamps in which a misalignment is detected during the 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.
  • the halogen incandescent lamp with 50 W power shown in FIGS. 1 and 2 is a lamp of the so-called type H7, which in certain applications replaces the lamp of the so-called type H1. In general, these lamps serve as separate high beams in car headlights.
  • the cylindrical hard glass bulb 1, which is squeezed on one side, is filled with inert gas and a halogen additive and with an axial helix 2 equipped, which is held by two power supply lines, which are melted into the pinch 3.
  • the pinch 3 is enclosed by a metallic holding element 4.
  • it consists of two shell halves 5, each of which has a web 6 formed on the piston side, which opens into an apron facing away from the piston.
  • the cone-shaped bulged end 8 of the apron 7 rests on the inside against the metallic base sleeve 9, which is designed as a hollow cylinder, and is connected to it by means of a laser welding L.
  • the advantage of laser welding is that there are no moments at the welding point during the welding process and therefore the adjustment accuracy is not impaired.
  • the base sleeve is also formed at the piston near the end of an adjusting ring 10, which has a number of recesses and knobs 11 to aid in correct positioning (FIG. 3).
  • the base sleeve is equipped with a narrow collar 12 which is bent inwards. Both the adjusting ring 10 and the completely circumferential collar 12 each lie in a plane transverse to the lamp axis.
  • the base sleeve 9 has two tabs 13 formed opposite one another. They are bent back inwards from the collar by 90 ° (in relation to the hollow cylinder by 180 °) and end just below the height of the adjusting ring.
  • the end 14 of each tab is forked or sheared in the manner of a barb, the fork being divided into a middle piece 15 and two outer tines 16. The latter are punched out of the flesh of the flap from its end 14 and extend back to about half the length of the flap.
  • a ceramic base stone 17 (made of steatite) is fitted into the base sleeve 9 and essentially has the shape of a solid cylinder (cf. FIG. 4). It has two kidney-shaped recesses 18 on the side in order to provide space for the ends 8 of the aprons.
  • a circumferential groove 19 on the circumference of the end of the base stone remote from the piston guarantees a play-free stop on the collar 12 of the base sleeve.
  • the base stone 17 also has two continuous longitudinal slots 20 into which the two tabs 13 are fitted. On the piston side, the longitudinal slots open into two semicircular cutouts 21, in which the tabs 13 end.
  • the base stone 17 is held on the base sleeve 9 by an entanglement. It is based on the end 14 of the tabs being twisted. The twisting leads to a "shortening" of the effective length of the tab.
  • the high tolerance in the thickness of the ceramic base stone is compensated for during twisting, since the twisting always starts at the bottom 22 of the semicircular recess. This is crucial for tolerance compensation.
  • the forking of the tab ends 14 results in an even better freedom from play and an even more effective tolerance compensation, since the outer tines spread like barbs when shortening the bottom 22 caused by the twisting. Different tolerances are compensated for by different spreading angles of the outer tines.
  • the base stone also has two axial bores 23.
  • two metal tubes as Round contacts 24 riveted by widening their upper end. At some distance from the upper end, they are equipped with a circumferential bead 25, which acts as a stop on a recess 26 on the end of the base stone remote from the piston.
  • the use of the round contacts which is made possible by the space-saving cabinet lock, is desirable compared to flat contacts, since a better contact to the connector is made on the socket side.
  • the attachment of the power leads 27 is facilitated.
  • the current leads 27 are angled from the pinch 3 to the round contacts 24 and are welded to the ends of the round contacts remote from the piston, where their inner cavity 28 tapers approximately to the diameter of the current leads.
  • the invention is not restricted to the exemplary embodiment shown.
  • the base stone is made of plastic. It is particularly advisable to limit the heat load on the base by attaching two shading elements to the holding part, which are shaped like butterfly wings. The semicircular recesses on the base stone can be omitted if the height of the base stone is reduced.
  • Another exemplary embodiment is particularly protected against splash water or the like, the side of the base remote from the piston being additionally clad and sealed by an injection-molded plastic layer.
  • the lamp is manufactured as follows: First, the round contacts are inserted into the base stone and riveted by widening their upper end. The base sleeve is then interlaced with the base stone.
  • the piston is equipped with the holding element.
  • Both assembled units are loosely assembled, with the power leads threaded into the round contacts. Now the lamp is adjusted in three dimensions. Finally, the holding element is welded to the base sleeve, the use of a laser ensuring that no more misalignment can take place.
  • the further exemplary embodiment of a halogen incandescent lamp having a power of 50 W is also 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 1 which is squeezed on one side, is filled with inert gas and a halogen additive and is equipped with an axial helix 2.
  • Two power supply lines 27 for the coil are melted into the pinch 3.
  • the pinch 3 is enclosed by a metallic holding element 4.
  • the apron 7 which is directed away from the bulb and is arranged approximately parallel to the lamp axis.
  • the cone-shaped Bulged end 8 of the apron 7 rests on the inside against a metallic base sleeve 9 designed as a hollow cylinder and is connected to it by means of a fusion weld.
  • the base sleeve is also formed on the piston near the end of an adjusting ring 10, which has a number of recesses and knobs 11 as an aid for correct positioning.
  • the adjusting ring 10 lies in a plane transverse to the lamp axis.
  • two mutually opposite tabs 13 are formed, which are used for mounting a base block 17 and which are arranged axially parallel (13 ') before the base block is installed (shown in dashed lines).
  • the ceramic base stone 17 (made of steatite), the height of which is somewhat less than that of the base sleeve, is fitted into the base sleeve 9 from below and has essentially the shape of a full cylinder. It has two kidney-shaped recesses 18 on the side in order to provide space for the ends 8 of the aprons 7.
  • a radially outwardly projecting edge 15 ' which rotates at the end of the base stone remote from the piston, offers a stop for the base sleeve.
  • the edge 15 ' is interrupted in the area of the tabs 13.
  • the base stone 17 also has on its distal end surface 16 'two elongated, radially from the edge 15' inwardly facing recesses 12 ', in which the two right-angled tabs 13 are embedded. At the inner edge of each recess 12 ', an additional, deeper recess 14' is made, in which the tab ends 19 'are bent. With this arrangement, the tabs are located 13 not flat on the end surface 16 ', but are convex with respect to the end surface 16'. This allows a particularly good compensation of the tolerances in dimensions, which are considerably higher for ceramic parts compared to plastic parts.
  • the base stone also has two axial bores 20 '.
  • these two metal tubes are riveted as round contacts 21 'by widening their upper end. At some distance from the upper end, they are equipped with a circumferential bead 22 ', which acts as a stop on a trough 23' at the end of the base stone remote from the piston.
  • the current leads 27 are angled from the pinch 3 coming to the round contacts 21 'and welded to the ends of the round contacts remote from the piston, where the inner cavity 24' tapers approximately to the diameter of the current leads.
  • a particularly good protection against splash water or the like. is achieved if the side of the base remote from the piston is additionally clad and sealed by a molded plastic layer.
  • FIGS. 7 and 8 show a further exemplary embodiment of a car lamp of the H7 type.
  • the hard glass bulb 31 and the filling as well as the axial filament 32 correspond to the second exemplary embodiment.
  • 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 laterally on the pinch 33.
  • 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 the collar 43 and the adjusting ring 44, is made in one piece from a cylindrical part using the inverted pull method.
  • 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 extremely stable configuration of base sleeve and holding element no longer lead to any deformation and associated misalignment of the lamp.
  • the bottom 46a of the recess 46 runs parallel to the end surface 47.
  • the bottom 46b is arranged at an angle to the end surface 47, so that the tab 45 'is bent by more than 90 ° and thereby the hold is improved ( Fig. 8a).
  • 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 threaded into two tapered, continuous openings 54, which are provided near the axis in the base block 48, and are connected to the welding eyes 55 of two contact lugs 56 at the end surface 47 remote from the piston.
  • the flat stamping bodies of the contact lugs 56 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, in each of which a conical opening 54 and a slot 57 open together, the welding eye 55 of the contact lug, which is angled 90 ° against the punch body of the contact lug, rests on the bottom of the trough 58.
  • a bevel 60 is recessed on one side at the mouth of each slot 57 and rises towards the conical opening 54.
  • the end 61 of each contact lug 56 protruding from the end face 59 forms a narrow arc over the welding eye and is slotted in the middle.
  • the underside 63 of each arch half 62 facing the welding eyelet is bevelled so that the height of the arch half increases towards the center of the contact lug (FIG. 9a).
  • the two bow halves 62 are rotated by a maximum of 90 ° in the direction of the bevel 60 (FIG. 7 or arrow in FIG. 9b) and rest on the latter.
  • the exemplary embodiments according to FIGS. 7 and 8 are distinguished by a particularly low overall height of the lamp. It is 62 mm. Compared to the exemplary embodiment according to FIGS. 1 and 5, this can save approximately 13 mm in overall height.
  • These very compact lamps meet 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.

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Description

Die Erfindung geht aus von einer kittlos gesockelten Lampe nach dem Oberbegriff des Anspruchs 1.The invention is based on a lamp without a cement according to the preamble of claim 1.

Derartige Lampen eignen sich insbesondere für den Einsatz in Reflektoren, insbesondere Kraftfahrzeugscheinwerfern.Such lamps are particularly suitable for use in reflectors, in particular motor vehicle headlights.

Bekannte Lampen dieser Art verwenden beispielsweise einen zweiteiligen Sockel, bei dem der Sockelstein aus Kunststoff gefertigt ist (DE-GM 82 01 536). Die metallische Sockelhülse ist in einer Aufnahme des Sockelsteins gehaltert.Known lamps of this type use, for example, a two-part base, in which the base stone is made of plastic (DE-GM 82 01 536). The metallic base sleeve is held in a receptacle of the base stone.

Der Sockelstein ist jedoch sehr kompliziert gestaltet und deshalb schwierig herzustellen.However, the base stone is very complicated and therefore difficult to manufacture.

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 zwischen den beiden Sockelteilen erfolgt durch eine Durchreißnietung, die jedoch viel Spiel läßt und außerdem ein zusätzliches Teil erfordert. Die optische Qualität eines Scheinwerfers hängt jedoch entscheidend von der Güte der Befestigung ab. Sie darf möglichst keinen Spielraum gestatten, um eine Dejustierung der Lampe in bezug auf den Fokus des Scheinwerfers zu vermeiden.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 attachment between the two base parts is carried out by a rivet, which leaves a lot of play and also requires an additional part. However, the optical quality of a headlight depends crucially on the quality of the attachment. As far as possible, it should not allow any play to avoid misalignment of the lamp with respect to the focus of the headlight.

Aufgabe der Erfindung ist es, eine Lampe mit zweiteiligem Sockel zu schaffen, die sich durch eine besonders einfache und spielfreie Verbindung zwischen den beiden Sockelteilen auszeichnet.The object of the invention is to provide a lamp with a two-part base, which is characterized by a particularly simple and play-free connection between the two base parts.

Diese Aufgabe wird durch die kennzeichnenden Merkmale des Anspruchs 1 und 18 gelöst. Weitere vorteilhafte Ausführungen der Erfindung finden sich in den darauf gerichteten abhängigen Ansprüchen.This object is solved by the characterizing features of claims 1 and 18. 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 zwischen den beiden Sockelteilen materialschonend und schnell herstellbar ist. Sie zeichnet sich außerdem durch hohe Justiergenauigkeit aus, wie sie insbesondere bei modernen Scheinwerfern in zunehmendem Maße erforderlich ist. Weiterhin gleicht diese Verbindung große Toleranzen der Sockelteile bei der Montage aus.A particular advantage of the invention lies in the fact that the connection between the two base parts can be produced gently and quickly. It is also characterized by a high degree of adjustment accuracy, which is increasingly required, especially in modern headlights. Furthermore, this connection compensates for large tolerances of the base parts during assembly.

Der Toleranzausgleich erfolgt auf verblüffend einfache Weise, indem die Laschen der Sockelhülse zum Sockelstein hin abgebogen werden und sich so der individuellen Abmessung des Sockelsteins anpassen können, wobei der Rand eines Sockelteils einen festen Anschlag definierter Höhe an dem ihm zugewandten Ende des anderen Sockelteils erfährt. Die metallische Sockelhülse kann mit minimaler Toleranz gefertigt werden.The tolerance compensation is carried out in an astonishingly simple manner by the tabs of the base sleeve being bent towards the base stone and thus being able to adapt to the individual dimensions of the base stone, the edge of a base part experiencing a fixed stop of a defined height at the end of the other base part facing it. The metallic base sleeve can be manufactured with minimal tolerance.

Bei einem besonders bevorzugten Ausführungsbeispiel liegen die Laschen eben auf der Endfläche des Sockelsteins an. Die eigentliche Halterung des Sockelsteins wird dabei im Bereich einer 90°-Biegung der Laschen erzielt.In a particularly preferred embodiment, the tabs just lie on the end face of the base stone. The actual mounting of the base stone is achieved in the area of a 90 ° bend in the tabs.

Eine noch bessere Haltewirkung wird erreicht, wenn die Laschenenden in Aussparungen der Endfläche des Sockelsteins eingebogen sind. Geradlinig abgebogene Laschen können sich wieder geringfügig aufbiegen und dadurch dem Sockelstein Spiel geben. Dagegen sind die in Aussparungen eingebogenen Laschen insgesamt konvex gewölbt. Es wird dadurch eine zweite Haltefläche im Bereich der Aussparung geschaffen. Ein Aufbiegen der gewölbten Lasche ist nicht zu befürchten.An even better holding effect is achieved if the tab ends are bent into recesses in the end face of the base stone. Straps bent in a straight line can bend slightly again and thus give the base stone play. In contrast, the tabs bent into the cutouts are convex overall. This creates a second holding surface in the area of the recess. There is no fear of the arched flap bending open.

Die Fixierung des Sockelsteins in der Sockelhülse wird erleichtert, wenn die Endfläche des Sockelsteins eine Vertiefung für die gesamte Lasche aufweist. Diese Vertiefung kann der Aussparung für das Laschenende überlagert sein.Fixing the base stone in the base sleeve is facilitated if the end face of the base stone has a recess for the entire tab. This depression can be superimposed on the cutout for the tab end.

Die hier beschriebene Verbindung zwischen Sockelstein und Sockelhülse 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. Bei der Verwendung von Kunststoffteilen muß eine Belagbildung auf dem Reflektor durch aufwendiges nachträgliches Ausheizen oder Auswaschen vermieden werden.The connection between the base stone and base sleeve 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. When using plastic parts, the formation of deposits on the reflector by expensive subsequent heating or washing must be avoided.

Die einfache Art der Verbindung bietet zudem genug Platz am Sockel, so daß sowohl der Einsatz von Rundkontakten als auch von Flachsteckern (Kontaktfahnen) ermöglicht wird. Dies eröffnet zudem die Möglichkeit, durch einen Außenverguß eine spritzwasserdichte Ausführung herzustellen.The simple type of connection also offers enough space on the base, so that both the use of round contacts and flat plugs (contact tabs) is made possible. This also opens up the possibility of producing a splash-proof design by an external potting.

Die Herstellung der Lampe läuft beispielsweise so ab, daß zunächst die Sockelhülse und der Lampenkolben mit dem Leuchtkörper 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, for example, by first adjusting and fixing the base sleeve and the lamp bulb with the luminous element 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 procedure has the advantage that lamps in which a misalignment is detected during the 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.

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

Figur 1
ein erstes 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
Die Sockelhülse der Lampe aus Figur 1 vor der Montage in Draufsicht (Figur 3a) und im Schnitt (Fig. 3b)
Figur 4
der Sockelstein der Lampe aus Figur 1 in Draufsicht (Figur 4a) und in Seitenansicht (Fig. 4b)
Figur 5
ein zweites Ausführungsbeispiel einer Halogenglühlampe für Autoscheinwerfer in Seitenansicht (Sockel geschnitten)
Figur 6
eine um 90° gedrehte Ansicht der Lampe aus Figur 5 (Sockel geschnitten)
Figur 7
ein drittes Ausführungsbeispiel in Seitenansicht (Sockel geschnitten)
Figur 8
eine um 90° gedrehte Ansicht der Lampe aus Figur 7 (Sockel teilweise geschnitten) und ein Detail eines weiteren Ausführungsbeispiels (Fig. 8a)
Figur 9
ein Kontaktelement der Lampe aus Figur 7 vor der Montage in Seitenansicht (Fig. 9a) und im Schnitt (Fig. 9b)
Several embodiments of the invention will be explained in more detail below. It shows
Figure 1
a first embodiment of a halogen 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
The base sleeve of the lamp from FIG. 1 before assembly in plan view (FIG. 3a) and in section (FIG. 3b)
Figure 4
the base of the lamp of Figure 1 in plan view (Figure 4a) and in side view (Fig. 4b)
Figure 5
a second embodiment of a halogen light bulb for car headlights in side view (cut base)
Figure 6
a view rotated by 90 ° of the lamp from FIG. 5 (base cut)
Figure 7
a third embodiment in side view (cut base)
Figure 8
a view rotated by 90 ° of the lamp of Figure 7 (base partially cut) and a detail of another embodiment (Fig. 8a)
Figure 9
a contact element of the lamp of Figure 7 before assembly in side view (Fig. 9a) and in section (Fig. 9b)

Bei der in Figur 1 und 2 gezeigten 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 separates Fernlicht in Autoscheinwerfern. Der zylindrische, einseitig gequetschte Hartglaskolben 1 ist mit Inertgas und einem Halogenzusatz gefüllt und mit einer Axialwendel 2 bestückt, die von zwei Stromzuführungen gehaltert wird, die in die Quetschung 3 eingeschmolzen sind. Die Quetschung 3 ist von einem metallischen Halteelement 4 umschlossen. Es besteht, wie an sich bekannt, aus zwei Schalenhälften 5, denen jeweils kolbenseitig ein Steg 6 angeformt ist, der in eine vom Kolben weggerichtete Schürze mündet. Das kegelmantelförmig ausgebauchte Ende 8 der Schürze 7 liegt innen an der als Hohlzylinder ausgebildeten metallischen Sockelhülse 9 an und ist mit dieser mittels einer Laserschweißung L verbunden. Der Vorteil einer Laserschweißung liegt darin, daß während des Schweißvorgangs keine Momente an der Schweißstelle auftreten und deshalb die Justiergenauigkeit nicht beeinträchtigt wird. Der Sockelhülse ist außerdem am kolbennahen Ende ein Einstellring 10 angeformt, der zur Hilfe für die richtige Positionierung mehrere Aussparungen und Noppen 11 aufweist (Fig. 3). Am kolbenfernen Ende ist die Sockelhülse mit einem nach innen abgebogenen, schmalen Kragen 12 ausgestattet. Sowohl der Einstellring 10 als auch der vollständig umlaufende Kragen 12 liegen jeweils in einer Ebene quer zur Lampenachse. Vom Kragen 12 ausgehend sind der Sockelhülse 9 zwei einander gegenüberliegende Laschen 13 angeformt. Sie sind vom Kragen aus um 90° (bezogen auf den Hohlzylinder um 180°) nach innen zurückgebogen und enden kurz unterhalb der Höhe des Einstellrings. Das Ende 14 jeder Lasche ist nach Art eines Widerhakens gegabelt oder geschert, wobei die Gabel in ein Mittelstück 15 und zwei Außenzinken 16 gegliedert ist. Letztere sind aus dem Fleisch der Lasche von deren Ende 14 her herausgestanzt und reichen bis etwa zur halben Länge der Lasche zurück.The halogen incandescent lamp with 50 W power shown in FIGS. 1 and 2 is a lamp of the so-called type H7, which in certain applications replaces the lamp of the so-called type H1. In general, these lamps serve as separate high beams in car headlights. The cylindrical hard glass bulb 1, which is squeezed on one side, is filled with inert gas and a halogen additive and with an axial helix 2 equipped, which is held by two power supply lines, which are melted into the pinch 3. The pinch 3 is enclosed by a metallic holding element 4. As is known per se, it consists of two shell halves 5, each of which has a web 6 formed on the piston side, which opens into an apron facing away from the piston. The cone-shaped bulged end 8 of the apron 7 rests on the inside against the metallic base sleeve 9, which is designed as a hollow cylinder, and is connected to it by means of a laser welding L. The advantage of laser welding is that there are no moments at the welding point during the welding process and therefore the adjustment accuracy is not impaired. The base sleeve is also formed at the piston near the end of an adjusting ring 10, which has a number of recesses and knobs 11 to aid in correct positioning (FIG. 3). At the end remote from the piston, the base sleeve is equipped with a narrow collar 12 which is bent inwards. Both the adjusting ring 10 and the completely circumferential collar 12 each lie in a plane transverse to the lamp axis. Starting from the collar 12, the base sleeve 9 has two tabs 13 formed opposite one another. They are bent back inwards from the collar by 90 ° (in relation to the hollow cylinder by 180 °) and end just below the height of the adjusting ring. The end 14 of each tab is forked or sheared in the manner of a barb, the fork being divided into a middle piece 15 and two outer tines 16. The latter are punched out of the flesh of the flap from its end 14 and extend back to about half the length of the flap.

In die Sockelhülse 9 ist ein keramischer Sockelstein 17 (aus Steatit) eingepaßt, der im wesentlichen die Form eines Vollzylinders besitzt (vgl. Fig. 4). Er weist seitlich zwei nierenförmige Aussparungen 18 auf, um Platz für die Enden 8 der Schürzen bereitzustellen. Eine umlaufende Nut 19 am Umfang des kolbenfernen Endes des Sockelsteins garantiert einen spielfreien Anschlag am Kragen 12 der Sockelhülse.A ceramic base stone 17 (made of steatite) is fitted into the base sleeve 9 and essentially has the shape of a solid cylinder (cf. FIG. 4). It has two kidney-shaped recesses 18 on the side in order to provide space for the ends 8 of the aprons. A circumferential groove 19 on the circumference of the end of the base stone remote from the piston guarantees a play-free stop on the collar 12 of the base sleeve.

Der Sockelstein 17 weist ferner zwei durchgehende Längsschlitze 20 auf, in die die beiden Laschen 13 eingepaßt sind. Kolbenseitig münden die Längsschlitze in zwei halbkreisförmige Aussparungen 21, in denen die Laschen 13 enden. Der Sockelstein 17 wird an der Sockelhülse 9 durch eine Verschränkung gehaltert. Sie beruht darauf, daß das Ende 14 der Laschen verdrillt wird. Die Verdrillung führt zu einer "Verkürzung" der effektiven Länge der Lasche. Die hohe Toleranz in der Dicke des keramischen Sockelsteins wird beim Verdrillen ausgeglichen, da die Verdrillung immer am Boden 22 der halbkreisförmigen Aussparung ansetzt. Dies ist für den Toleranzausgleich von entscheidender Bedeutung. Die Gabelung der Laschenenden 14 bewirkt in diesem Zusammenhang eine noch bessere Spielfreiheit und einen noch wirkungsvolleren Toleranzausgleich, da sich die Außenzinken bei der durch die Verdrillung bewirkten Verkürzung am Boden 22 wie Widerhaken abspreizen. Der Ausgleich unterschiedlicher Toleranzen erfolgt durch unterschiedliche Spreizwinkel der Außenzinken.The base stone 17 also has two continuous longitudinal slots 20 into which the two tabs 13 are fitted. On the piston side, the longitudinal slots open into two semicircular cutouts 21, in which the tabs 13 end. The base stone 17 is held on the base sleeve 9 by an entanglement. It is based on the end 14 of the tabs being twisted. The twisting leads to a "shortening" of the effective length of the tab. The high tolerance in the thickness of the ceramic base stone is compensated for during twisting, since the twisting always starts at the bottom 22 of the semicircular recess. This is crucial for tolerance compensation. In this context, the forking of the tab ends 14 results in an even better freedom from play and an even more effective tolerance compensation, since the outer tines spread like barbs when shortening the bottom 22 caused by the twisting. Different tolerances are compensated for by different spreading angles of the outer tines.

Der Sockelstein weist weiterhin zwei axiale Bohrungen 23 auf. In diesen sind zwei Metall-Röhrchen als Rundkontakte 24 eingenietet, indem deren oberes Ende aufgeweitet ist. In einiger Entfernung vom oberen Ende sind sie mit einem umlaufenden Wulst 25 ausgestattet, der an einer Vertiefung 26 am kolbenfernen Ende des Sockelsteins als Anschlag wirkt. Der Einsatz der Rundkontakte, der durch den platzsparenden Schränkverschluß ermöglicht wird, ist im Vergleich zu Flachkontakten wünschenswert, da fassungsseitig ein besserer Kontakt zum Stecker hergestellt wird. Außerdem wird die Befestigung der Stromzuführungen 27 erleichtert. Die Stromzuführungen 27 sind von der Quetschung 3 kommend zu den Rundkontakten 24 hin abgewinkelt und an den kolbenfernen Enden der Rundkontakte, wo sich deren innerer Hohlraum 28 ungefähr auf den Durchmesser der Stromzuführungen verjüngt, verschweißt.The base stone also has two axial bores 23. In these are two metal tubes as Round contacts 24 riveted by widening their upper end. At some distance from the upper end, they are equipped with a circumferential bead 25, which acts as a stop on a recess 26 on the end of the base stone remote from the piston. The use of the round contacts, which is made possible by the space-saving cabinet lock, is desirable compared to flat contacts, since a better contact to the connector is made on the socket side. In addition, the attachment of the power leads 27 is facilitated. The current leads 27 are angled from the pinch 3 to the round contacts 24 and are welded to the ends of the round contacts remote from the piston, where their inner cavity 28 tapers approximately to the diameter of the current leads.

Die Erfindung ist nicht auf das gezeigte Ausführungsbeispiel beschränkt.The invention is not restricted to the exemplary embodiment shown.

Bei einem anderen Ausführungsbeispiel ist der Sockelstein aus Kunststoff hergestellt. Hierbei ist es besonders empfehlenswert, die Wärmebelastung des Sockels dadurch zu begrenzen, daß zwei Abschattungselemente am Halteteil angebracht werden, die ähnlich wie Schmetterlingsflügel geformt sind. Die halbkreisförmigen Aussparungen am Sockelstein können entfallen, wenn die Höhe des Sockelsteins reduziert wird.In another embodiment, the base stone is made of plastic. It is particularly advisable to limit the heat load on the base by attaching two shading elements to the holding part, which are shaped like butterfly wings. The semicircular recesses on the base stone can be omitted if the height of the base stone is reduced.

Ein weiteres Ausführungsbeispiel ist besonders geschützt gegen Spritzwasser o.ä., wobei die kolbenferne Seite des Sockels zusätzlich durch eine angespritzte Kunststoffschicht verkleidet und abgedichtet ist.Another exemplary embodiment is particularly protected against splash water or the like, the side of the base remote from the piston being additionally clad and sealed by an injection-molded plastic layer.

Die Herstellung der Lampe läuft folgendermaßen ab: Zunächst werden die Rundkontakte in den Sockelstein eingesetzt und durch Aufweitung ihres oberen Endes vernietet. Anschließend wird die Sockelhülse mit dem Sockelstein verschränkt.The lamp is manufactured as follows: First, the round contacts are inserted into the base stone and riveted by widening their upper end. The base sleeve is then interlaced with the base stone.

Parallel hierzu wird der Kolben mit dem Halteelement bestückt.At the same time, the piston is equipped with the holding element.

Beide montierte Einheiten werden lose zusammengefügt, wobei die Stromzuführungen in die Rundkontakte eingefädelt werden. Nun erfolgt die Justierung der Lampe in drei Dimensionen. Abschließend wird das Halteelement mit der Sockelhülse verschweißt, wobei die Benutzung eines Lasers sicherstellt, daß keinerlei Dejustierung mehr erfolgen kann.Both assembled units are loosely assembled, with the power leads threaded into the round contacts. Now the lamp is adjusted in three dimensions. Finally, the holding element is welded to the base sleeve, the use of a laser ensuring that no more misalignment can take place.

Bei dem schematisch in Figur 5 und 6 gezeigten weiteren Ausführungsbeispiel einer Halogenglühlampe mit 50 W Leistung handelt es sich ebenfalls 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 1 ist mit Inertgas und einem Halogenzusatz gefüllt und mit einer Axialwendel 2 bestückt. Zwei Stromzuführungen 27 für die Wendel sind in die Quetschung 3 eingeschmolzen. Die Quetschung 3 ist von einem metallischen Halteelement 4 umschlossen. Es besteht aus zwei Schalenhälften 5a, 5b, denen jeweils am kolbenfernen Ende ein kurzer Steg 6 angeformt ist, der rechtwinklig nach außen gebogen ist und in eine vom Kolben weggerichtete Schürze 7 mündet, die etwa parallel zur Lampenachse angeordnet ist. Das kegelmantelförmig ausgebauchte Ende 8 der Schürze 7 liegt innen an einer als Hohlzylinder ausgebildeten metallischen Sockelhülse 9 an und ist mit dieser mittels einer Schmelzschweißung verbunden. Der Sockelhülse ist außerdem am kolbennahen Ende ein Einstellring 10 angeformt, der als Hilfe für die richtige Positionierung mehrere Aussparungen und Noppen 11 aufweist. Der Einstellring 10 liegt in einer Ebene quer zur Lampenachse. Am kolbenfernen Ende der Sockelhülse 9 sind zwei einander gegenüberliegende Laschen 13 angeformt, die zur Montage eines Sockelsteins 17 dienen und die vor der Montage des Sockelsteins achsparallel (13′) angeordnet sind (gestrichelt eingezeichnet).The further exemplary embodiment of a halogen incandescent lamp having a power of 50 W, shown schematically in FIGS. 5 and 6, is also 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 1, which is squeezed on one side, is filled with inert gas and a halogen additive and is equipped with an axial helix 2. Two power supply lines 27 for the coil are melted into the pinch 3. The pinch 3 is enclosed by a metallic holding element 4. It consists of two shell halves 5a, 5b, each of which has a short web 6 formed on the end remote from the bulb, which is bent outward at right angles and opens into an apron 7 which is directed away from the bulb and is arranged approximately parallel to the lamp axis. The cone-shaped Bulged end 8 of the apron 7 rests on the inside against a metallic base sleeve 9 designed as a hollow cylinder and is connected to it by means of a fusion weld. The base sleeve is also formed on the piston near the end of an adjusting ring 10, which has a number of recesses and knobs 11 as an aid for correct positioning. The adjusting ring 10 lies in a plane transverse to the lamp axis. At the end of the base sleeve 9 remote from the piston, two mutually opposite tabs 13 are formed, which are used for mounting a base block 17 and which are arranged axially parallel (13 ') before the base block is installed (shown in dashed lines).

Der keramische Sockelstein 17 (aus Steatit), dessen Höhe etwas geringer als die der Sockelhülse ist, ist in die Sockelhülse 9 von unten eingepaßt und besitzt im wesentlichen die Form eines Vollzylinders. Er weist seitlich zwei nierenförmige Aussparungen 18 auf, um Platz für die Enden 8 der Schürzen 7 bereitzustellen. Ein radial nach außen abstehender Rand 15′, der am kolbenfernen Ende des Sockelsteins umläuft, bietet einen Anschlag für die Sockelhülse. Der Rand 15′ ist im Bereich der Laschen 13 unterbrochen.The ceramic base stone 17 (made of steatite), the height of which is somewhat less than that of the base sleeve, is fitted into the base sleeve 9 from below and has essentially the shape of a full cylinder. It has two kidney-shaped recesses 18 on the side in order to provide space for the ends 8 of the aprons 7. A radially outwardly projecting edge 15 ', which rotates at the end of the base stone remote from the piston, offers a stop for the base sleeve. The edge 15 'is interrupted in the area of the tabs 13.

Der Sockelstein 17 weist ferner an seiner kolbenfernen Endfläche 16′ zwei längliche, radial vom Rand 15′ nach innen weisende Vertiefungen 12′ auf, in die die beiden rechtwinklig abgebogenen Laschen 13 eingebettet sind. Am inneren Rand jeder Vertiefung 12′ ist eine zusätzliche, tiefere Aussparung 14′ angebracht, in die die Laschenenden 19′ eingebogen sind. Durch diese Anordnung liegen die Laschen 13 nicht an der Endfläche 16′ flach an, sondern sind in bezug auf die Endfläche 16′ konvex gewölbt. Dies gestattet einen besonders guten Ausgleich der bei Keramikteilen im Vergleich zu Kunststoffteilen erheblich höheren Toleranzen in den Abmessungen.The base stone 17 also has on its distal end surface 16 'two elongated, radially from the edge 15' inwardly facing recesses 12 ', in which the two right-angled tabs 13 are embedded. At the inner edge of each recess 12 ', an additional, deeper recess 14' is made, in which the tab ends 19 'are bent. With this arrangement, the tabs are located 13 not flat on the end surface 16 ', but are convex with respect to the end surface 16'. This allows a particularly good compensation of the tolerances in dimensions, which are considerably higher for ceramic parts compared to plastic parts.

Der Sockelstein weist weiterhin zwei axiale Bohrungen 20′ auf. In diesen sind zwei Metall-Röhrchen als Rundkontakte 21′ eingenietet, indem deren oberes Ende aufgeweitet ist. In einiger Entfernung vom oberen Ende sind sie mit einem umlaufenden Wulst 22′ ausgestattet, der an einer Mulde 23′ am kolbenfernen Ende des Sockelsteins als Anschlag wirkt. Die Stromzuführungen 27 sind von der Quetschung 3 kommend zu den Rundkontakten 21′ hin abgewinkelt und an den kolbenfernen Enden der Rundkontakte, wo sich deren innerer Hohlraum 24′ ungefähr auf den Durchmesser der Stromzuführungen verjüngt, verschweißt. Ein besonders guter Schutz gegen Spritzwasser o.ä. wird erreicht, wenn die kolbenferne Seite des Sockels zusätzlich durch eine angespritzte Kunststoffschicht verkleidet und abgedichtet ist.The base stone also has two axial bores 20 '. In these two metal tubes are riveted as round contacts 21 'by widening their upper end. At some distance from the upper end, they are equipped with a circumferential bead 22 ', which acts as a stop on a trough 23' at the end of the base stone remote from the piston. The current leads 27 are angled from the pinch 3 coming to the round contacts 21 'and welded to the ends of the round contacts remote from the piston, where the inner cavity 24' tapers approximately to the diameter of the current leads. A particularly good protection against splash water or the like. is achieved if the side of the base remote from the piston is additionally clad and sealed by a molded plastic layer.

Ein weiteres Ausführungsbeispiel einer Autolampe des Typs H7 zeigt Figur 7 und 8. Der Hartglaskolben 31 und die Füllung sowie die Axialwendel 32 entsprechen dem zweiten Ausführungsbeispiel. 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.
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.FIGS. 7 and 8 show a further exemplary embodiment of a car lamp of the H7 type. The hard glass bulb 31 and the filling as well as the axial filament 32 correspond to the second exemplary embodiment. 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 laterally on the pinch 33. 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 the collar 43 and the adjusting ring 44, is made in one piece from a cylindrical part using the inverted pull method.
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 extremely stable configuration of base sleeve and holding element no longer lead to any deformation and associated misalignment of the lamp.

Am kolbenfernen Ende 49 des Hohlzylinders der Sockelhülse 40, das leicht nach innen gebogen ist, sind ähnlich wie im zweiten Ausführungsbeispiel zwei einander gegenüberstehende, geradlinig nach innen abgebogene Laschen 45 angeformt, die in Vertiefungen 46 an der kolbenfernen Endfläche 47 eines keramischen Sockelsteins 48 eingepaßt sind.On the distal end 49 of the hollow cylinder of the base sleeve 40, which is slightly bent inward, two mutually opposite, rectilinearly bent tabs 45 are formed similarly as in the second embodiment, which are fitted into recesses 46 on the distal end surface 47 of a ceramic base stone 48 .

Der Boden 46a der Vertiefung 46 verläuft in diesem Ausführungsbeispiel parallel zur Endfläche 47. In einem anderen Ausführungsbeispiel ist der Boden 46b leicht gewinkelt zur Endfläche 47 angeordnet, so daß die Lasche 45′ um mehr als 90° abgebogen wird und dadurch der Halt verbessert wird (Fig. 8a). 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. 9a und 9b) 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. Das an der Endfläche 59 überstehende Ende 61 jeder Kontaktfahne 56 bildet einen schmalen Bogen über der Schweißöse und ist mittig geschlitzt. Die zur Schweißöse gewandte Unterseite 63 jeder Bogenhälfte 62 ist so abgeschrägt, daß die Höhe der Bogenhälfte zur Mitte der Kontaktfahne hin zunimmt (Fig. 9a). Die beiden Bogenhälften 62 sind um maximal 90° in Richtung zur Schräge 60 verdreht (Fig. 7 bzw. Pfeil in Fig. 9b) und liegen an dieser an. 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 tragen. 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".In this exemplary embodiment, the bottom 46a of the recess 46 runs parallel to the end surface 47. In another exemplary embodiment, the bottom 46b is arranged at an angle to the end surface 47, so that the tab 45 'is bent by more than 90 ° and thereby the hold is improved ( Fig. 8a). 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 threaded into two tapered, continuous openings 54, which are provided near the axis in the base block 48, and are connected to the welding eyes 55 of two contact lugs 56 at the end surface 47 remote from the piston. The flat stamping bodies of the contact lugs 56 (FIGS. 9a and 9b) 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, in each of which a conical opening 54 and a slot 57 open together, the welding eye 55 of the contact lug, which is angled 90 ° against the punch body of the contact lug, rests 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 end 61 of each contact lug 56 protruding from the end face 59 forms a narrow arc over the welding eye and is slotted in the middle. The underside 63 of each arch half 62 facing the welding eyelet is bevelled so that the height of the arch half increases towards the center of the contact lug (FIG. 9a). The two bow halves 62 are rotated by a maximum of 90 ° in the direction of the bevel 60 (FIG. 7 or arrow in FIG. 9b) and rest on the latter. In this way, a secure and play-free attachment of the contact lug to the ceramic base stone is achieved, which take into account the large tolerances in 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.

Die Ausführungsbeispiele gemäß Figur 7 und 8 zeichnen sich durch eine besonders geringe Bauhöhe der Lampe aus. Sie beträgt 62 mm. Damit lassen sich gegenüber dem Ausführungsbeispiel gemäß Figur 1 und 5 ca. 13 mm an Bauhöhe einsparen. Diese sehr kompakten Lampen kommen 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.The exemplary embodiments according to FIGS. 7 and 8 are distinguished by a particularly low overall height of the lamp. It is 62 mm. Compared to the exemplary embodiment according to FIGS. 1 and 5, this can save approximately 13 mm in overall height. These very compact lamps meet 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.

Claims (19)

  1. Electrical lamp, capped without cement, consisting of at least
    - a glass bulb (1), pinched at one end, having at least one illumination body (2)
    - current feed lines (27) which are led out at the pinch (3)
    - a two-component cap, consisting of a metallic cap sleeve (9) and a second cap component consisting of insulating material (referred to below as cap insulator (17))
    - contact elements which are attached to the cap and are connected in an electrically conductive fashion to the current feed lines,
    characterized in that the cap sleeve (9; 40) is constructed as a hollow cylinder into which the cap insulator (17; 48) is fitted as a complete cylinder, one of the two cap components having at the end remote from the bulb an edge (12; 15'; 50) on which the second cap component rests, and clips (13; 45) being formed onto the cap sleeve (9) at the end remote from the bulb and being bent at least approximately 90° inwards towards the end face of the cap insulator so that the edge and the clips interact to form a play-free connection of the two cap components.
  2. Lamp according to Claim 1, characterized in that the edge of the hollow cylindrical cap sleeve is formed on and realized as an inwardly bent collar (12) which extends transversely with respect to the axis of the cylinder whilst the clips (13) of the cap sleeve are bent back inwards approximately 180° and are fitted into two continuous longitudinal slots (20) of the cap insulator, the ends (14) of the two clips protruding over the slots (20) and being twisted.
  3. Lamp according to Claim 2, characterized in that the two longitudinal slots (20) widen at the end near to the bulb into two recesses (21), and in that the ends (14) of the clips are twisted in the region of the recesses (21).
  4. Lamp according to Claim 2 or 3, characterized in that the ends (14) of the clips are forked in the manner of a barb into a central element (15) and two outer prongs (16), the ends of the outer prongs (16) spreading apart at the end face of the cap insulator (17) facing them.
  5. Lamp according to Claim 1, characterized in that the cap insulator (17; 48) is made of ceramic.
  6. Lamp according to Claim 1, characterized in that the cap insulator (17) has a peripheral groove (19) into which the collar (12) of the hollow cylinder is fitted.
  7. Lamp according to Claim 1, characterized in that the cap is connected to the pinch of the bulb by means of a securing element (4).
  8. Lamp according to Claim 1, characterized in that the contact elements are constructed as round pins (24) which are inserted into bores (23) in the cap insulator (17).
  9. Lamp according to Claim 1, characterized in that the edge (15'; 50) is formed onto the cap insulator (17) and protrudes outwards, and in that the clips (13) are bent approximately 90° inwards towards the end face (16'; 47) of the cap insulator.
  10. Lamp according to Claim 9, characterized in that the clips (13) are embedded in depressions (12'; 46) of the end face, remote from the bulb, of the cap insulator.
  11. Lamp according to Claim 9 or 10, characterized in that an (additional) recess (14') for the end (19') of the clip is provided.
  12. Lamp according to Claim 9, characterized in that the clips are bent convexly with respect to the end face (16').
  13. Lamp according to Claim 10, characterized in that the depression has a base which is inclined obliquely with respect to the end face of the cap insulator.
  14. Lamp according to Claim 1, characterized in that two clips (13; 45) which are located opposite one another are formed onto the cap sleeve.
  15. Lamp according to Claim 1, characterized in that the end face (59), near to the bulb, of the cap insulator has oblique surfaces (60), and in that the contact elements are constructed as vanes (56) which are anchored in continuous longitudinal slots (57) on the cap insulator, the vanes (56) having bent eyelet components (55) which rest against the end face, remote from the bulb, of the cap insulator and the bulb-side end (61) of the vanes protrudes at the bulb-side end face (59), is bent there and rests in a clamping fashion in the region of the oblique surfaces (60) on the bulb-side end face (59).
  16. Lamp according to Claim 1, characterized in that the hollow cylinder of the cap sleeve (40) is bent back outwards at its bulb-side end and forms a collar (43) on which an adjustment ring (44) is formed.
  17. Lamp according to Claim 16, characterized in that the pinch (33) of the bulb (31) is enclosed by a cup-shaped securing element (34) which has a circular ring (39) which surrounds the collar (43) of the cap sleeve and is spot-welded to it.
  18. Halogen lamp for motor vehicle headlights, consisting of
    - a glass bulb (1), pinched at one end, having an illumination body (2)
    - current feed lines (27) which are led out at the pinch (3)
    - a two-component cap, consisting of a metallic cap sleeve (9) and a cap insulator (17) made of ceramic
    - a securing element (4) which encloses the pinch of the bulb and is connected to the cap sleeve (9)
    - contact elements which are attached to the cap and are connected in an electrically conductive fashion to the current feed lines,
    characterized in that the cap sleeve (9) is constructed as a hollow cylinder on which two clips (13) which are located opposite one another are formed at the end remote from the bulb, which clips (13) are bent back inwards 180°, and in that the cap insulator (17) is inserted as a complete cylinder into the hollow cylinder and has two continuous longitudinal slots (20) which widen on the bulb side to form recesses (21), the ends (14) of the two clips protruding beyond the slots into the region of the recesses (21) and being twisted there.
  19. Halogen lamp according to Claim 18, characterized in that the ends of the clips are forked in the manner of a barb into a central element (15) and two outer prongs (16), the ends of the outer prongs spreading apart at the base of the recesses.
EP90102595A 1989-02-24 1990-02-09 Electrical lamp capped without cement Expired - Lifetime EP0384240B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE8902247U DE8902247U1 (en) 1989-02-24 1989-02-24
DE8902247U 1989-02-24
DE8907108U 1989-06-09
DE8907108U DE8907108U1 (en) 1989-06-09 1989-06-09

Publications (3)

Publication Number Publication Date
EP0384240A2 EP0384240A2 (en) 1990-08-29
EP0384240A3 EP0384240A3 (en) 1991-05-02
EP0384240B1 true EP0384240B1 (en) 1994-04-20

Family

ID=25954406

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90102595A Expired - Lifetime EP0384240B1 (en) 1989-02-24 1990-02-09 Electrical lamp capped without cement

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US (1) US5010272A (en)
EP (1) EP0384240B1 (en)
DD (1) DD292994A5 (en)
DE (1) DE59005400D1 (en)
ES (1) ES2051398T3 (en)
HU (1) HU202678B (en)

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DE9012292U1 (en) * 1990-08-27 1990-10-31 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
DE9017224U1 (en) * 1990-12-20 1991-03-07 Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh, 8000 Muenchen, De
US5432400A (en) * 1992-09-25 1995-07-11 Gte Products Corporation Lamp having interference-fit metallic bases
US5331529A (en) * 1993-03-17 1994-07-19 Huang Shun Feng Electrical lamp base system
DE19602625A1 (en) * 1996-01-25 1997-07-31 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Electric lamp
FR2798491B1 (en) * 1999-09-10 2001-11-23 Intermec Scanner Technology Ct OPTOELECTRONIC DEVICE FOR ACQUIRING IMAGES OF PLANS-OBJECTS, ESPECIALLY BAR CODES
DE10121608A1 (en) * 2001-05-04 2002-11-07 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Electric lamp
US20050218774A1 (en) * 2002-04-26 2005-10-06 Bhagwat Ramachandra S Incandescent electric lamp and socket assembly
DE20300699U1 (en) * 2003-01-16 2003-03-20 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Lamp base and lamp with a lamp base
DE10325553A1 (en) * 2003-06-05 2004-12-23 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Lamp closed on both sides
CN1985343A (en) * 2003-06-17 2007-06-20 皇家飞利浦电子股份有限公司 A lamp comprising an envelope part and a cap part
CN101167152A (en) 2003-08-01 2008-04-23 皇家飞利浦电子股份有限公司 Lamp and method of manufacturing same
US7227308B2 (en) * 2003-11-24 2007-06-05 General Electric Company Assembly for precision focus of compact PAR lamps
DE102005028506A1 (en) * 2005-06-17 2006-12-21 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Lamp ring, lamp and pedestal machine
DE102010002650B4 (en) * 2010-03-08 2012-11-22 Osram Ag Halogen bulb for vehicle headlights
DE102010039412A1 (en) * 2010-08-17 2012-02-23 Osram Ag High-pressure discharge lamp and method for producing a high-pressure discharge lamp
CN102280359A (en) * 2011-07-26 2011-12-14 句容市宝正照明电器有限责任公司 Automobile halogen lamp holder
CN104913626A (en) * 2015-05-28 2015-09-16 洛阳驰达自动化设备制造有限公司 Microwave drying device for LED modulator tube plaster

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DE2932638A1 (en) * 1979-08-11 1981-02-26 Philips Patentverwaltung ELECTRIC LAMP WITH A SOCKET-BASED BASE
DE8104771U1 (en) * 1981-02-20 1982-08-05 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München BASE OF A HALOGEN 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)
DE8121528U1 (en) * 1981-07-22 1982-11-18 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München TWO-THREAD HALOGEN BULB FOR MOTOR VEHICLE HEADLIGHTS
DE8201536U1 (en) * 1982-01-22 1983-06-30 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München HALOGEN BULB
JPS63451U (en) * 1986-06-20 1988-01-05
DE3806978A1 (en) * 1988-03-03 1989-09-14 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh KITTLESS BASED ELECTRIC LAMP

Also Published As

Publication number Publication date
HU202678B (en) 1991-03-28
HUT53246A (en) 1990-09-28
US5010272A (en) 1991-04-23
EP0384240A3 (en) 1991-05-02
DE59005400D1 (en) 1994-05-26
EP0384240A2 (en) 1990-08-29
DD292994A5 (en) 1991-08-14
HU900904D0 (en) 1990-05-28
ES2051398T3 (en) 1994-06-16

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