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EP0172529B1 - Electric lamp - Google Patents

Electric lamp Download PDF

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Publication number
EP0172529B1
EP0172529B1 EP85110200A EP85110200A EP0172529B1 EP 0172529 B1 EP0172529 B1 EP 0172529B1 EP 85110200 A EP85110200 A EP 85110200A EP 85110200 A EP85110200 A EP 85110200A EP 0172529 B1 EP0172529 B1 EP 0172529B1
Authority
EP
European Patent Office
Prior art keywords
base
electric lamp
lamp according
casing
power leads
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
EP85110200A
Other languages
German (de)
French (fr)
Other versions
EP0172529A2 (en
EP0172529A3 (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
Application filed by Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of EP0172529A2 publication Critical patent/EP0172529A2/en
Publication of EP0172529A3 publication Critical patent/EP0172529A3/en
Application granted granted Critical
Publication of EP0172529B1 publication Critical patent/EP0172529B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • 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 which consists of a lamp bulb squeezed on one side with current leads led out at the pinch, a metal holding element which fixes the lamp bulb, a cup-shaped base sleeve made of plastic and at least two base contacts which are firmly welded to the current leads.
  • the base plate of the cup-shaped base sleeve is provided with through-holes for the passage of the current leads.
  • Such lamps are known for example from EP-A-0 084 848 (and DE-GM-82 01 526), which u.a. to seal a car headlamp hermetically at its apex opening.
  • at least one groove with a sealing ring is provided on the circumference of a plastic base sleeve, the sealing ring abutting the reflector neck of the headlight.
  • the power supply lines of this lamp are passed through openings in the base of the base sleeve and through openings in the base contacts, which are aligned with the former, and then welded to the base contacts in such a way that the base contact openings are also hermetically sealed. Since such a welding process is quite complex and complex, attempts have been made to find a construction which allows the lamp to be sealed from its base in a simple manner and also to protect the connection points between power supply lines and base contacts from weather and mechanical influences .
  • the base contacts are mounted on a further wall part, whereby a fixation is achieved.
  • a continuous opening in the base plate of the base sleeve is formed solely by the holes for the power supply lines.
  • their diameter is only slightly larger than that of the power leads themselves, so that the holes can be easily closed afterwards.
  • it is closed by base sleeve material, which previously surrounds the holes in the form of a collar and is melted.
  • resins made of plastic e.g. silicone
  • the base sleeve consists of a high-temperature-resistant plastic material that withstands the heat radiated by the lamp bulb.
  • the connector can be made of a cheaper plastic.
  • the two parts are connected to one another by ultrasonic heating, nipples or projections being formed on one of the parts, which, when melted down, undercut the other part.
  • the lamps for motor vehicle headlights shown in the figures consist of a lamp bulb 1, 21 pinched on one side with one (FIG. 4) or two (FIG. 1) luminous elements 2, 22.
  • the power supply lines 3, 23 are led out of the lamp pinch.
  • the lamp is an incandescent lamp, to which a halogen addition has been added to the inert gas.
  • the lamp bulb 1, 21 is surrounded on its pinch by a sleeve 4, 24 made of metal, which is part of a holding element 5, 25 and is connected to the base sleeve 7, 27 made of plastic via molded webs 6, 26.
  • the lower ends of the webs 6.26 are provided with a bead and this with openings so that when the two parts 6, 7; 26, 27 can penetrate base sleeve material by means of high-frequency heating. This ensures a firm and secure connection.
  • the base sleeve 7, 27 itself consists of a cup-shaped plastic part, the open end of which faces the lamp bulb 1, 21.
  • this plastic is very heat-resistant, since temperatures of up to 240 ° C arise from the burning lamp.
  • a possible plastic is, for example, a polyphenylene sulfide reinforced with glass fibers and mineral fillers.
  • the base plate of the base sleeve 7, 27 is provided with bores 8 (not shown in FIG. 4) for the passage of the current leads 3, 23. Their diameter is only slightly larger than that of the power supply lines 3, 23 themselves. Molded funnels 9 facilitate threading. To seal the base sleeve 7 to the lamp bulb 1 in the exemplary embodiment according to FIG. 1, the bores 8 are closed by introducing resins on the back of the base plate.
  • the knife-shaped base contacts 10 of the lamp according to FIG. 1 are mounted on the back of the base plate in slot-shaped blind holes 11 into which the contacts 10 are fitted with a play-free seat.
  • the current leads 3 protruding through the base plate are welded to the base contacts 10 on this side, two of the four current leads 3 being connected from only one end of the two luminous elements 2 (ground contact) to only one base contact 10.
  • this lamp base sleeve unit On this lamp base sleeve unit is a connector 12, the bushings for Has base contacts 10, placed from below. It is constructed in such a way that the connection points between power supply lines 3 and base contacts 10 are arranged in a closed cavity 13.
  • the resin provided for closing the bores 8 fills this entire cavity 13 and thus seals all the gaps, that is to say also the bushings for the base contacts 10 in the connecting part 12.
  • Base sleeve 7 and connector 12 are riveted together.
  • 7 nipples 14 are formed on the back of the base sleeve, which protrude through openings in the connecting part 12 and are deformed by means of ultrasound.
  • the connecting part 12 itself can consist of a plastic material that is not as heat-resistant as that of the base sleeve 7, since no such high temperatures arise on this part. This has the advantage that the lamps - apart from the technically favorable two-part design of the base - can be manufactured inexpensively.
  • the connecting part 32 of the lamp according to FIG. 4 is pot-shaped.
  • the base contacts 30 are passed through a side wall part of the connection part 32.
  • the ends of the base contacts 30 projecting into the cavity 33 are supported by a projection 28 on the wall part which is opposite the one provided with the bushings for the base contacts 30, this projection 28 cooperating with a groove in the base contact 30.
  • the connecting part 32 is fastened to the base sleeve 27 before the power leads 23 are connected to the base contacts 30. This is done by projections formed on the connection part 32, the material flows after melting into a circumferential groove 29 arranged in the base sleeve.
  • the connecting part 32 has an opening through which the cavity 33 is accessible for the operation of connecting the power supply 23 and the base contact 30. After the welding process, the opening is closed by a cover 40.
  • This cover 40 advantageously has lugs 41 on its inside, which cooperate with a further groove in the base contacts 30.
  • the base contacts 30 are thus also secured in their axial direction and cannot be pulled out when a plug is removed.
  • the base is sealed by means of collars 42 formed on the bore for the passage of the current leads, which are melted after the passage of the current leads 23 and lie tightly against them. Sealing can also be carried out by pouring resin with the cavity (e.g. with silicone rubber).
  • a sleeve 15, 45 surrounding the base contacts 10, 30 is formed on the connecting part 12, 32 and is provided for receiving in a plug.
  • the base contacts 10, 30 are thus largely protected from moisture and thus from corrosion and good contact is guaranteed.
  • the nose 16, 46 is provided on the sleeve 15, 45 against unintentional loosening of the plug.

Landscapes

  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
  • Connecting Device With Holders (AREA)

Description

Die Erfindung betrifft eine elektrische Lampe, die aus einem einseitig gequeteschten Lampenkolben mit an der Quetschung herausgeführten Stromzuführungen, einem den Lampenkolben fixierenden Halteelement aus Metall, einer topfförmigen Sockelhülse aus Kunststoff und aus wenigstens zwei Sockelkontakten, die mit den Stromzuführungen fest verschweißt sind, besteht. Die Bodenplatte der topfförmigen Sockelhülse ist mit durchgehenden Bohrungen zum Durchführen der Stromzuführungen versehen.The invention relates to an electric lamp which consists of a lamp bulb squeezed on one side with current leads led out at the pinch, a metal holding element which fixes the lamp bulb, a cup-shaped base sleeve made of plastic and at least two base contacts which are firmly welded to the current leads. The base plate of the cup-shaped base sleeve is provided with through-holes for the passage of the current leads.

Derartige Lampen sind beispielsweise aus dem EP-A-0 084 848 (and DE-GM-82 01 526) bekannt, die u.a. einen Kfz-Scheinwerfer an seiner Scheitelöffnung hermetisch dicht abschließen sollen. Zu diesem Zweck ist am Umfang einer Sockelhülse aus Kunststoff wenigstens eine Nut mit einem Dichtungsring vorgesehen, wobei der Dichtungsring an dem Reflektorhals des Scheinwerfers anliegt. Die Stromzuführungen dieser Lampe sind durch Öffnungen im Boden der Sockelhülse und durch Öffnungen in den Sockelkontakten, die mit ersteren fluchten, hindurchgeführt und anschließend mit den Sockelkontakten derart verschweißt, daß die Sockelkontaktöffnungen ebenfalls hermetisch dicht verschlossen werden. Da ein derartiges Schweißverfahren recht aufwendig und kompliziert ist, wurde versucht, eine Konstruktion zu finden, die es erlaubt, di Lampe von ihrem Sockelboden aus auf einfache Art und Weise abzudichten und auch die Verbindungsstellen zwischen Stromzuführungen und Sockelkontakten vor Witterungs- und mechanischen Einflüssen zu schützen.Such lamps are known for example from EP-A-0 084 848 (and DE-GM-82 01 526), which u.a. to seal a car headlamp hermetically at its apex opening. For this purpose, at least one groove with a sealing ring is provided on the circumference of a plastic base sleeve, the sealing ring abutting the reflector neck of the headlight. The power supply lines of this lamp are passed through openings in the base of the base sleeve and through openings in the base contacts, which are aligned with the former, and then welded to the base contacts in such a way that the base contact openings are also hermetically sealed. Since such a welding process is quite complex and complex, attempts have been made to find a construction which allows the lamp to be sealed from its base in a simple manner and also to protect the connection points between power supply lines and base contacts from weather and mechanical influences .

Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Kennzeichnenden Teils des Hauptanspruchs gelöst.This object is achieved by the features of the characterizing part of the main claim.

Mit ihren in den Hohlraum hineinragenden Enden sind die Sockelkontakte an einem weiteren Wandteil gelagert, wodurch eine Fixierung erreicht wird. Eine durchgehende Öffnung in der Bodenplatte der Sockelhülse wird allein von den Bohrungen für die Stromzuführungen gebildet. Ihr Durchmesser ist jedoch nur geringfügig größer als der der Stromzuführungen selbst, so daß die Bohrungen nachträglich leicht verschlossen werden können. Das Verschließen erfolgt in einem Fall durch Sockelhülsenmaterial, das zuvor in Form von Kragen die Bohrungen umgibt und geschmolzen wird. In einer weiteren vorteilhaften Ausführung ist es auch möglich, diese Öffnungen mit Harzen aus Kunststoff (z.B. Silikon) zu verschließen, was fertigungstechnisch leichter zu handhaben ist.With their ends protruding into the cavity, the base contacts are mounted on a further wall part, whereby a fixation is achieved. A continuous opening in the base plate of the base sleeve is formed solely by the holes for the power supply lines. However, their diameter is only slightly larger than that of the power leads themselves, so that the holes can be easily closed afterwards. In one case, it is closed by base sleeve material, which previously surrounds the holes in the form of a collar and is melted. In a further advantageous embodiment, it is also possible to close these openings with resins made of plastic (e.g. silicone), which is easier to handle in terms of production technology.

Die Sockelhülse besteht aus einem hochtemperaturbeständigen Kunststoffmaterial, das der vom Lampenkolben abgestrahlten Wärme standhält. Das Anschlußteil kann aus einem preisgunstigeren Kunststoff hergestellt sein. Die Verbindung beider Teile miteinander erfolgt durch Ultraschallerwärmung, wobei an einem der Teile Nippel bzw. Vorsprünge angeformt sind, die, in heruntergeschmolzenem Zustand, das andere Teil hinterschneiden.The base sleeve consists of a high-temperature-resistant plastic material that withstands the heat radiated by the lamp bulb. The connector can be made of a cheaper plastic. The two parts are connected to one another by ultrasonic heating, nipples or projections being formed on one of the parts, which, when melted down, undercut the other part.

Weitere Einzelheiten der Erfindung werden anhand von Zeichnungen näher erläutert. Es zeigt

  • Figur 1 die Seitenansicht einer ersten Ausführungsform der Lampe mit geschnittenem Sockel
  • Figur 2 eine Draufsicht der Lampe nach Figur 1
  • Figur 3 eine Ansicht von unten auf die Lampe nach Figur 1
  • Figur 4 die Seitenansicht einer weiteren Ausführungsform der Lampe mit teilweise geschnittenem Sockel
Further details of the invention are explained in more detail with reference to drawings. It shows
  • Figure 1 is a side view of a first embodiment of the lamp with a cut base
  • FIG. 2 shows a top view of the lamp according to FIG. 1
  • Figure 3 is a bottom view of the lamp of Figure 1
  • Figure 4 is a side view of another embodiment of the lamp with a partially cut base

Die in den Figuren dargestellten Lampen für Kfz-Scheinwerfer bestehen aus einem einseitig gequetschten Lampenkolben 1,21 mit einem (Fig. 4) oder auch zwei (Fig. 1) Leuchtkörpern 2, 22. Die Stromzuführungen 3, 23 sind aus der Lampenquetschung herausgeführt. Die Lampe ist in diesen beiden Fällen eine Glühlampe, der zum Inertgas ein Halogenzusatz zugegeben ist. Der Lampenkolben 1,21 ist an seiner Quetschung von einer Manschette 4, 24 aus Metall umgeben, die Teil eines Halteelementes 5, 25 ist und über angeformte Stege 6, 26 mit der Sockelhülse 7, 27 aus Kunststoff verbunden ist.The lamps for motor vehicle headlights shown in the figures consist of a lamp bulb 1, 21 pinched on one side with one (FIG. 4) or two (FIG. 1) luminous elements 2, 22. The power supply lines 3, 23 are led out of the lamp pinch. In these two cases, the lamp is an incandescent lamp, to which a halogen addition has been added to the inert gas. The lamp bulb 1, 21 is surrounded on its pinch by a sleeve 4, 24 made of metal, which is part of a holding element 5, 25 and is connected to the base sleeve 7, 27 made of plastic via molded webs 6, 26.

Zu diesem Zweck sind die unteren Enden der Stege 6,26 mit einem Wulst und dieser mit Durchbrüchen versehen, so daß bei dem Verbinden beider Teile 6, 7; 26, 27 mittels Hochfrequenzerwärmen Sockelhülsenmaterial hindurchdringen kann. Somit ist eine feste und sichere Verbindung gewährleistet.For this purpose, the lower ends of the webs 6.26 are provided with a bead and this with openings so that when the two parts 6, 7; 26, 27 can penetrate base sleeve material by means of high-frequency heating. This ensures a firm and secure connection.

Die Sockelhülse 7, 27 selbst besteht aus einem topfförmigen Kunststoffteil, dessen offenes Ende dem Lampenkolben 1, 21 zugewandt ist. Vorteilhafterweise ist dieser Kunststoff sehr wärmebeständig, da durch die brennende Lampe Temperaturen bis zu 240°C entstehen. Ein möglicher Kunststoff ist beispielsweise ein mit Glasfasern und mineralischen Füllstoffen verstärktes Polyphenylensulfid.The base sleeve 7, 27 itself consists of a cup-shaped plastic part, the open end of which faces the lamp bulb 1, 21. Advantageously, this plastic is very heat-resistant, since temperatures of up to 240 ° C arise from the burning lamp. A possible plastic is, for example, a polyphenylene sulfide reinforced with glass fibers and mineral fillers.

Die Bodenplatte der Sockelhülse 7, 27 ist mit Bohrungen 8 (in Fig. 4 nicht dargestellt) zum Durchführen der Stromzuführungen 3, 23 versehen. Ihr Durchmesser ist nur geringfügig größer als der der Stromzuführungen 3, 23 selbst. Angeformte Trichter 9 erleichtern das Einfädeln. Zum Abdichten der Sockelhülse 7 zum Lampenkolben 1 hin sind in dem Ausführungsbeispiel nach Fig. 1 die Bohrungen 8 durch Einbringen von Harzen auf der Rückseite der Bodenplatte verschlossen.The base plate of the base sleeve 7, 27 is provided with bores 8 (not shown in FIG. 4) for the passage of the current leads 3, 23. Their diameter is only slightly larger than that of the power supply lines 3, 23 themselves. Molded funnels 9 facilitate threading. To seal the base sleeve 7 to the lamp bulb 1 in the exemplary embodiment according to FIG. 1, the bores 8 are closed by introducing resins on the back of the base plate.

Die messerförmigen Sockelkontakte 10 der Lampe nach Fig. 1 sind auf der Rückseite der Bodenplatte in schlitzförmigen Sacklöchern 11 gelagert, in die die Kontakte 10 mit spielfreiem Sitz eingepaßt sind. Die durch die Bodenplatte hindurchragenden Stromzuführungen 3 werden auf dieser Seite mit den Sockelkontakten 10 verschweißt, wobei zwei der vier Stromzuführungen 3 von jeweils einem Ende der beiden Leuchtkörper 2 (Massekontakt) mit nur einem Sockelkontakt 10 verbunden sind.The knife-shaped base contacts 10 of the lamp according to FIG. 1 are mounted on the back of the base plate in slot-shaped blind holes 11 into which the contacts 10 are fitted with a play-free seat. The current leads 3 protruding through the base plate are welded to the base contacts 10 on this side, two of the four current leads 3 being connected from only one end of the two luminous elements 2 (ground contact) to only one base contact 10.

Auf diese Lampen-Sockelhülsen-Einheit wird ein Anschlußteil 12, das Durchführungen für die Sockelkontakte 10 aufweist, von unten her aufgesetzt. Es ist derart konstruiert, daß die Verbindungsstellen zwischen Stromzuführungen 3 und Sockelkontakten 10 in einem geschlossenen Hohlraum 13 angeordnet sind. Vorteilhafterweise füllt der zum Verschließen der Bohrungen 8 vorgesehene Harz diesen ganzen Hohlraum 13 aus und dichtet somit sämtliche Spalten, also auch die Durchführungen für die Sockelkontakte 10 in dem Anschlußteil 12 ab.On this lamp base sleeve unit is a connector 12, the bushings for Has base contacts 10, placed from below. It is constructed in such a way that the connection points between power supply lines 3 and base contacts 10 are arranged in a closed cavity 13. Advantageously, the resin provided for closing the bores 8 fills this entire cavity 13 and thus seals all the gaps, that is to say also the bushings for the base contacts 10 in the connecting part 12.

Sockelhülse 7 und Anschlußteil 12 sind miteinander vernietet. Zu diesem Zweck sind auf der Rückseite der Sockelhülse 7 Nippel 14 angeformt, die durch Öffnungen in dem Anschlußteil 12 hindurchragen und mittels Ultraschall verformt werden. Das Anschlußteil 12 selbst kann aus einem Kunststoffmaterial bestehen, das nicht so wärmebeständig ist wie das der Sockelhülse 7, da an diesem Teil keine so hohen Temperaturen entstehen. Dies hat den Vorteil, daß die Lampen - abgesehen von der fertigungstechnisch günstigen Zweiteiligkeit des Sockels - preisgünstig hergestellt werden können.Base sleeve 7 and connector 12 are riveted together. For this purpose, 7 nipples 14 are formed on the back of the base sleeve, which protrude through openings in the connecting part 12 and are deformed by means of ultrasound. The connecting part 12 itself can consist of a plastic material that is not as heat-resistant as that of the base sleeve 7, since no such high temperatures arise on this part. This has the advantage that the lamps - apart from the technically favorable two-part design of the base - can be manufactured inexpensively.

Das Anschlußteil 32 der Lampe nach Fig. 4 ist topfförmig ausgestaltet. Die Sockelkontakte 30 sind durch ein seitliches Wandteil des Anschlußteils 32 hindurchgeführt. Eine Lagerung der in den Hohlraum 33 ragenden Enden der Sockelkontakte 30 erfolgt durch einen Vorsprung 28 auf dem Wandteil, das dem mit den Durchführungen für die Sockelkontakte 30 versehenen gegenüberliegt, wobei dieser Vorsprung 28 mit einer Nut im Sockelkontakt 30 zusammenwirkt.The connecting part 32 of the lamp according to FIG. 4 is pot-shaped. The base contacts 30 are passed through a side wall part of the connection part 32. The ends of the base contacts 30 projecting into the cavity 33 are supported by a projection 28 on the wall part which is opposite the one provided with the bushings for the base contacts 30, this projection 28 cooperating with a groove in the base contact 30.

In diesem Ausführungsbeispiel einer erfindungsgemäßen Lampe wird das Anschlußteil 32 vor Verbinden der Stromzuführungen 23 mit den Sockelkontakten 30 an der Sockelhülse 27 befestigt. Dies erfolgt durch an dem Anschlußteil 32 angeformte Vorsprünge, dem Material nach Schmelzen in eine in der Sockelhülse angeordnete umlaufende Nut 29 hineinfließt.In this exemplary embodiment of a lamp according to the invention, the connecting part 32 is fastened to the base sleeve 27 before the power leads 23 are connected to the base contacts 30. This is done by projections formed on the connection part 32, the material flows after melting into a circumferential groove 29 arranged in the base sleeve.

Das Anschlußteil 32 weist eine Öffnung auf, durch die der Hohlraum 33 für den Arbeitsgang des Verbindens von Stromzuführung 23 und Sockelkontakt 30 zugänglich ist. Nach dem Schweißvorgang wird die Öffnung von einem Deckel 40 vorschlossen.The connecting part 32 has an opening through which the cavity 33 is accessible for the operation of connecting the power supply 23 and the base contact 30. After the welding process, the opening is closed by a cover 40.

Vorteilhafterweise weist dieser Deckel 40 auf seiner Innenseite Nasen 41 auf, die mit einer weiteren Nut in den Sockelkontakten 30 zusammenwirken. Die Sockelkontakte 30 sind so auch in ihrer axialen Richtung gesichert und können beim Abziehen eines Steckers nicht herausgezogen werden.This cover 40 advantageously has lugs 41 on its inside, which cooperate with a further groove in the base contacts 30. The base contacts 30 are thus also secured in their axial direction and cannot be pulled out when a plug is removed.

Ein Abdichten des Sockels erfolgt in diesem Ausführungsbeispiel durch an die Bohrung zum Durchführen der Stromzuführungen angeformte Kragen 42, die nach Durchführen der Stromzuführungen 23 geschmolzen werden und sich dicht an diese anlegen. Die Dichtung kann auch durch Ausgießen mit Harzen des Hohlraumes (z.B. mit Silikonautschuk) erfolgen.In this exemplary embodiment, the base is sealed by means of collars 42 formed on the bore for the passage of the current leads, which are melted after the passage of the current leads 23 and lie tightly against them. Sealing can also be carried out by pouring resin with the cavity (e.g. with silicone rubber).

An dem Anschlußteil 12, 32 ist in beiden Ausführungsbeispielen eine die Sockelkontakte 10, 30 umgebende Hülse 15,45 angeformt, die zur Aufnahme in einem Stecker vorgesehen ist. Die Sockelkontakte 10, 30 sind somit weitgehendst vor Feuchtigkeit und damit vor Korrosion geschützt und eine gute Kontaktgabe ist gewährleistet. Gegen unbeabsichtigtes Lösen des Steckers ist an der Hülse 15, 45 die Nase 16, 46 vorgesehen.In both exemplary embodiments, a sleeve 15, 45 surrounding the base contacts 10, 30 is formed on the connecting part 12, 32 and is provided for receiving in a plug. The base contacts 10, 30 are thus largely protected from moisture and thus from corrosion and good contact is guaranteed. The nose 16, 46 is provided on the sleeve 15, 45 against unintentional loosening of the plug.

Claims (20)

1. Electric lamp consisting of a lamp bulb (1,21) which is pinched on one side, having power leads (3, 23) led out at the pinching, a metal holding element (5, 25) fastening the lamp bulb (1, 21), a cup-shaped base casing (7,27) of plastics material, and at least two base contacts (10, 30) which are firmly soldered to the power leads (3, 23), the floor plate of the base casing (7,27) being provided with drilled holes (8) which pass through it so that the power leads (3, 23) can be led through, characterised in that a two-part base with a closed hollow space (13, 33) is formed so that, on the end of the base casing (7,27) facing away from the lamp bulb (1,21), there is non-detachably attached a connecting piece (12, 32) consisting of insulating material and having a wall part through which the base contacts (10, 30) are led, and forming, together with the floor plate of the base casing (7, 27), the hollow space (13, 33) in which the connection points between the power leads (3, 23) and the base contacts (10, 30) are located.
2. Electric lamp according to claim 1, characterised in that the diameter of the drilled holes (8), for leading the power leads (3, 23) through, is insignificantly greater than the diameter of the power leads (3, 23) themselves.
3. Electric lamp according to claim 2, characterised in that, on the side facing the lamp bulb (1, 21) of the floor plate of the base casing, the drilled holes (8) are widened out into a funnel shape.
4. Electric lamp according to claim 2, characterised in that around each of the drilled holes (8) there are integrally moulded collars (42), the material of which is melted down after the power leads (23) are led through.
5. Electric lamp according to claim 2, characterised in that at leastthe drilled holes (8), after the power leads (3) are led through, are sealed with a plastics resin.
6. Electric lamp according to claim 5, characterised in that the plastics resin is silicon resin.
7. Electric lamp according to claim 1, characterised in that, at least on a further wall part of the hollow space (13, 33), means (11, 28, 41) are provided for fastening the base contacts (10, 30).
8. Electric lamp according to claim 7, characterised in that the means of fastening the base contacts (10) are pocket holes (11).
9. Electric lamp according to claim 7, characterised in that the means of fastening the base contacts (30) are projections (28, 41) which cooperate with slots on the base contacts (30).
10. Electric lamp according to claim 1, characterised in that the base casing (7, 27) consists of a plastics material resistant to high temperatures.
11. Electric lamp according to claim 1, characterised in that the connecting piece (12, 32) consists of plastics material.
12. Electric lamp according to claims 10 and 11, characterised in that the two parts (7,12) (27, 32) of the base are non-detachably connected together by a rivet connection.
13. Electric lamp according to claim 12, characterised in that the two parts (7, 12) of the base are connected together by means of an ultrasonic riveting (14).
14. Electric lamp according to claim 12, characterised in that the two parts (27,32) of the base are connected together by means of ultrasonic heating.
15. Electric lamp according to claim 1, characterised in that there is integrally moulded, on the connecting piece (12, 32), a casing (15, 45) which surrounds the base contacts (10, 30).
16. Electric lamp according to claim 1, characterised in that the holding element (5, 25) is connected by way of two angular cross-pieces (6, 26) to the base casing (7, 27).
17. Electric lamp according to claim 16, characterised in that the holding element (5, 25) and the base casing (7, 27) are connected together by means of high-frequency heating.
18. Electric lamp according to claim 17, characterised in that the cross-pieces (6, 26) of the holding element (5, 25) each have, in the region of the connection to the base casing (7, 27), an integrally moulded beading which is provided with holes through which the material of the base casing (7, 27) flows when the holding element is high-frequency heated.
19. Electric lamp according to claims 1 to 18, characterised in that the lamp bulb (1, 21 ) is filled with an inert gas and an addition of halogen.
20. Electric lamp according to claim 1, characterised in that the connecting piece (32) has an aperture sealed with a lid (40), this aperture giving access to the hollow space for the process of connecting the power lead (23) and the base contact (30).
EP85110200A 1984-08-24 1985-08-14 Electric lamp Expired - Lifetime EP0172529B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3431191 1984-08-24
DE3431191 1984-08-24
DE3528399 1985-08-07
DE19853528399 DE3528399A1 (en) 1984-08-24 1985-08-07 ELECTRIC LAMP

Publications (3)

Publication Number Publication Date
EP0172529A2 EP0172529A2 (en) 1986-02-26
EP0172529A3 EP0172529A3 (en) 1988-10-12
EP0172529B1 true EP0172529B1 (en) 1990-07-11

Family

ID=25824151

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85110200A Expired - Lifetime EP0172529B1 (en) 1984-08-24 1985-08-14 Electric lamp

Country Status (4)

Country Link
US (1) US4609977A (en)
EP (1) EP0172529B1 (en)
KR (1) KR900006585B1 (en)
DE (2) DE3528399A1 (en)

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DE8615923U1 (en) * 1986-06-13 1986-07-31 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 81543 München Electric lamp for car lighting
US4719543A (en) * 1987-02-06 1988-01-12 Gte Products Corporation Replaceable lamp unit for automobile headlight
JPS6412458A (en) * 1987-07-06 1989-01-17 Koito Mfg Co Ltd Electric lamp with base
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US5664870A (en) * 1995-06-28 1997-09-09 Koito Manufacturing Co., Ltd. Vehicular lamps
DE19616409A1 (en) * 1996-04-24 1997-10-30 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Electric lamp
JPH11219764A (en) * 1998-02-02 1999-08-10 Koito Mfg Co Ltd Socket plug
US7417364B2 (en) * 2006-09-11 2008-08-26 Osram Sylvania, Inc. Light source with sealant cover
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DE102007023638B4 (en) * 2007-05-22 2012-03-29 Friedrich-Alexander-Universität Erlangen-Nürnberg Lamp base for an electric lamp and its manufacture
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Also Published As

Publication number Publication date
DE3578615D1 (en) 1990-08-16
EP0172529A2 (en) 1986-02-26
KR860002160A (en) 1986-03-26
KR900006585B1 (en) 1990-09-13
DE3528399A1 (en) 1986-02-27
US4609977A (en) 1986-09-02
EP0172529A3 (en) 1988-10-12

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