DE202020101383U1 - Lighting device with adapter ring - Google Patents

Abstract

Lighting device comprising - a lighting fixture (1) which has a head section (1a) and a base section (1b), - at least one illuminant (2), the illuminant (2) being provided on the head section (1a) of the lighting fixture (1) , and- at least one adapter ring (3), the adapter ring (3) being provided for fastening the lighting device in a lamp holder (5), characterized in that the adapter ring (3) has three or more cutouts (3a, 3b, 3c).

Description

TECHNICAL AREA

The invention relates to a lighting device comprising a lighting fixture which has a head section and a base section, at least one lamp, the lighting device being provided on the head section of the lighting device, and at least one adapter ring, the adapter ring being provided for fastening the lighting device in a lamp holder. Furthermore, the invention relates to an adapter ring for fastening a subject lighting device in a lamp holder and a headlamp comprising a subject lighting device.

BACKGROUND

Recent advances in LED technology and the associated new design options and energy efficiency make it possible to use traditional light sources with lighting devices such as light emitting diodes, eg. B. so-called LEDs (Light Emitting Diodes) to replace. For some specific applications, for example in automotive lighting, it is desirable to carry out a so-called “retrofitting” of lighting devices, e.g. B. in front and / or rear lights. For example, it is advantageous if only the conventional light source, for example an incandescent lamp, is replaced by an LED lighting device, while the other elements of the lamps, e.g. optical elements such as reflector and lenses, do not need to be replaced. Therefore, there are efforts to provide such retrofit lighting devices that are a 1: 1 replacement for traditional standard light sources in automotive lighting, such as H7 halogen lamps.

However, configuring lighting devices to retrofit traditional light sources is a challenge. First, the lighting pattern of the traditional light source must be closely mimicked by the arrangement and specification of the light emitting elements in order to be able to use the same optical elements as for a traditional light source. For example, LEDs may have to be arranged along an arrangement direction in such a way that they imitate the shape of an incandescent filament of an incandescent lamp. In addition, the heat dissipation from the LEDs must be effective to ensure a long lifespan of the LEDs. This poses a particular challenge, since the reproduction of the lighting pattern of the traditional light source can require the very close arrangement of several LEDs, which can lead to a concentration of heat within a small volume. With retrofits, e.g. in automotive lighting, a high light output is required, which also leads to a high heat emission of the lamps used. Finally, the illuminants must be supplied with electrical energy in an efficient manner, taking into account the additional heat development in the electrical connections.

So-called adapter rings are used to fasten lighting devices, for example in a lamp holder in a headlight, which are primarily responsible for ensuring that the illuminants of the device are positioned in the correct place in the headlight and are securely fastened. This is particularly relevant in the field of automotive lighting, since lighting devices in vehicle headlights, for example, are regularly exposed to vibrations. Current retrofit lighting devices include adapter rings that sometimes do not allow the device to be securely seated in the lamp holder.

OBJECT OF THE INVENTION

It is therefore, inter alia, the object of the present invention to provide a lighting device which ensures a permanently stable and secure attachment of a lighting fixture in a lamp holder, and which is also inexpensive to manufacture and has an increased service life. In addition, it is an object of the present invention to provide an advantageous adapter ring for fastening a lighting device and an advantageous headlight comprising a lighting device.

To this end, the inventor has found that the instability of conventional systems is at least partially caused by the fact that conventional adapter rings have only two mutually opposite recesses into which reference pins which are located on a lighting fixture engage. This makes the lighting fixture unstable, particularly in the case of vibrations in the orthogonal direction to the pin arrangement. In addition to the risk of a distorted beam shape and thus a safety risk, for example from dazzling drivers of oncoming vehicles, it has also been shown that during a vibration test the adapter rings wear out quickly and the lighting fixture can fall out of the holder.

According to a first teaching of the present invention, the above-mentioned object for a lighting device therefore comprises (1) a lighting fixture which has a head section and a base section, (2) at least a lamp, the lamp being provided on the head portion of the lighting fixture, and (3) at least one adapter ring, the adapter ring being provided for fastening the lighting device in a lamp holder, in that the adapter ring has three or more cutouts.

According to a second teaching of the present invention, the object shown above is achieved by an adapter ring for fastening a lighting device according to the invention in a lamp holder.

According to a third teaching of the present invention, the above-mentioned object is achieved by a headlight comprising a lighting device according to the invention.

• Es hat sich herausgestellt, dass mit Hilfe der vorliegenden Erfindung die Stabilität eines in einer Lampenaufnahme, beispielsweise eines Scheinwerfers, insbesondere eines Fahrzeugscheinwerfers, befestigten Beleuchtungskörpers erhöht werden kann. Während bei einer Ausgestaltung des Adapterrings mit lediglich zwei sich gegenüberliegenden Aussparungen eine Schwingachse konstruiert wird, welche vor allem bei Vibrationen zur Lockerung des Beleuchtungskörpers in dem Adapterring führt, kann mit der erfindungsgemäßen Ausbildung des Adapterrings mit drei oder mehr Aussparungen die Stabilität der Beleuchtungsvorrichtung deutlich erhöht werden, da es keine Schwingachse mehr gibt. Die auf die Beleuchtungsvorrichtung wirkenden Kräfte können über drei Punkte gleichmäßig verteilt aufgenommen werden. Hierdurch wird vorteilhaft eine konstant akkurate Position gewährleistet und gleichzeitig der Verschleiß der Teile drastisch reduziert, so dass die Erfindung auch im Hinblick auf die Lebensdauer der Vorrichtung erhebliche Vorteile bietet. Aufgrund der verbesserten Stabilität der erfindungsgemäßen Beleuchtungsvorrichtung in der Lampenaufnahme ist ferner eine sehr genaue Nachahmung der Beleuchtung traditioneller Beleuchtungsvorrichtungen, wie z.B. Glühlichtquellen auf der Basis einer Glühwendel für Fahrzeugscheinwerfer, möglich. Insbesondere kann das Beleuchtungsmuster von Lichtquellen wie Halogenlampen mit dem mindestens einen Leuchtmittel der Beleuchtungsvorrichtung genau nachgebildet werden.

Exemplary embodiments of the first, second and / or third teaching of the present invention may have one or more of the properties and / or features described below:

• It has been found that the stability of a lighting fixture fastened in a lamp holder, for example a headlight, in particular a vehicle headlight, can be increased with the aid of the present invention. While in a configuration of the adapter ring with only two opposing recesses, an oscillation axis is constructed, which leads to loosening of the lighting fixture in the adapter ring, particularly in the case of vibrations, the stability of the lighting device can be significantly increased with the inventive design of the adapter ring with three or more recesses , since there is no longer an oscillating axis. The forces acting on the lighting device can be absorbed evenly over three points. This advantageously ensures a constantly accurate position and at the same time drastically reduces the wear on the parts, so that the invention also offers considerable advantages with regard to the life of the device. Due to the improved stability of the lighting device according to the invention in the lamp holder, it is also possible to imitate the lighting of traditional lighting devices very precisely, such as, for example, incandescent light sources based on an incandescent filament for vehicle headlights. In particular, the lighting pattern of light sources such as halogen lamps can be exactly reproduced with the at least one illuminant of the lighting device.

The adapter ring is provided for the detachable fastening of a preferably standardized lighting fixture in a preferably standardized lamp holder, for example a lamp holder of a vehicle headlight. For this purpose, the adapter ring has three or more cutouts in which, for example, fastening means provided on the lighting fixture can engage. The adapter sleeve, which is in particular sleeve-shaped, can include the lighting fixture, for example, on a receiving section provided on its base section. The adapter ring can be pushed over the lighting fixture onto the receiving section of the base section and can be fastened thereon preferably by means of at least one fastening means. Alternatively, the adapter ring can also be attached to any other section of the lighting fixture. The adapter ring preferably has an inner circumferential surface which is adapted to the corresponding section of the lighting body, in particular to the outer circumferential surface of the receiving section or base section, preferably with a precise fit and particularly preferably with a positive fit. The mechanism for attachment is preferably based on a bayonet lock. Bayonet locks represent a quick-to-produce and detachable mechanical connection between two parts. For example, the lighting fixture can be inserted into the correlating adapter ring and the parts can be connected to one another by turning them in opposite directions.

By using the adapter ring, the lighting fixture is suitable for a large number of lamp types in a simple manner and with a small number of components, which results in low production costs and comparatively low complexity. The lighting device is preferably designed according to the modular principle, can be used flexibly with different lights and has an inexpensive design.

The lighting fixture can be attached, for example, to a lamp holder or lamp holder of a headlight, in particular a vehicle headlight, by means of the adapter ring. The adapter ring is preferably for H1 and / or H4 and / or for H7 and / or for H8 and / or for H9 and / or for H11 and / or for H16 and / or for HB3 and / or intended for HB4 and / or for HIR1 and / or for H10 and / or for HID sockets. The adapter ring is also intended for American versions, for example. Further configurations for frames are conceivable. The above list is exemplary and not limiting. The adapter ring can, for example, be made from glass fiber reinforced plastic (GRP), acrylonitrile-butadiene-styrene copolymer (ABS) or from metals such as aluminum or steel.

The lighting fixture is formed, for example, in one piece, so that the head section and the base section consist of a single body. The lighting fixture is preferably made of one material, preferably by means of die casting, particularly preferably by milling.

The head section, which is equipped with at least one lamp, preferably serves not only as a holder for the at least one lamp but also as a heat conductor of the heat given off by the lamp. The illuminant can emit heat to the head section of the lighting fixture. The head section is preferably arranged directly on the base section, the head section in particular being in thermal contact with the base section, so that heat which is generated by one or more lamps can in turn be transferred from the head section to the base section. The head section and / or the base section can in particular comprise a volume and / or a surface which are configured in such a way that they offer heat dissipation suitable for the heat generated by the at least one illuminant and cooling for the illuminant. The head section and / or the base section can thus simultaneously take on a cooling function and act as a heat conductor, which is particularly advantageous if lamps with high heat output are used, e.g. for vehicle headlights. The invention can therefore enable both the optical and the thermal aspects to be optimized.

In this case, lamp holder means a device that receives the lighting device and holds it in an intended position, preferably in a headlight in the automotive sector. The lighting device is preferably provided and adapted for the automotive sector, for example for a vehicle, in particular for the automotive lighting sector, for example front headlights and / or rear headlights.

The lighting device, especially the illuminant, can be used in particular for a fog light function, a daytime running light function, a low beam function, a high beam function, a rear light function, a signal light function, a position light function, a flashing light function, a brake light function, an accent lighting function, as an effect lamp, and for other non-automotive applications Applications, to name just a few non-limiting examples.

According to a first exemplary embodiment, the adapter ring can be fixed on the base section of the lighting fixture. The lighting fixture can be inserted and locked into the adapter ring, for example. A secure fixation of the lighting fixture in the adapter ring ensures on the one hand a constant beam path, on the other hand the wear of the components is considerably reduced.

According to a further exemplary embodiment, a shoulder is formed on the base section, the adapter ring being axially supported on the shoulder. The base section of the lighting fixture can have a receiving section for the adapter ring. An outer lateral surface of the receiving section and an inner lateral surface of the adapter ring are preferably matched to one another. For example, the receiving section is cylindrical or circular cylindrical. A shoulder is preferably provided at the end of the receiving section, on which the adapter ring can be supported, preferably axially along the longitudinal axis, the shoulder being able to point towards the head section. To form the shoulder, a cylindrical or circular-cylindrical section can be provided, which can adjoin the receiving section and can be designed to be radially widened relative to the latter. Furthermore, it can be provided that the receiving section merges at the end into the, in particular flatter, head section. For this purpose, the receiving section can be tapered towards the head section.

According to a further exemplary embodiment, the adapter ring is wave-shaped. The particularly slightly wavy design of the adapter ring, in particular a contact surface of the adapter ring, allows the lighting element to be rotated in the ring in discrete steps. A defined alignment of the illuminant in relation to an optical element, e.g. a reflector.

The lighting fixture preferably has three or more fastening means, the fastening means of the lighting fixture being designed for positive locking in the recesses of the adapter ring. In particular, the number of fasteners therefore corresponds to the number of recesses in the adapter ring. In this way, in particular a bayonet lock can be implemented, the adapter ring and the lighting element each representing part of the bayonet lock. This can advantageously ensure a releasable connection and a secure hold of the lighting fixture in the ring. By providing three fastening means, which can be accommodated in the recesses of the adapter ring, the lighting fixture can only be rotated about 120 degrees within the adapter ring. The more recesses on the adapter ring and fasteners on Lighting fixtures are provided, the more scope for rotation, the lighting fixture remains in the ring. In an exemplary embodiment, more than three fastening means and more than three recesses can also be included.

The fastening means are preferably formed on the base section of the lighting fixture. The adapter ring then lies, for example, on a shoulder of the base section. According to an exemplary embodiment, the adapter ring partially surrounds the base section with its inner lateral surface. It therefore makes sense that the fastening means are formed on the base section of the fastening body. In particular, the outer skin of the lighting fixture, in particular of the base section, has the fastening means inseparable. In the manufacture of the lighting fixture, for example by die casting, the fastening means can preferably also be cast.

According to a further exemplary embodiment, the fastening means are designed as guide pins, the guide pins preferably having a length of 1 to 3 mm. A fixation of the lighting fixture by positive locking can advantageously be achieved by a pin-shaped configuration of the fastening means. In particular in the case of a barrel-shaped design of the guide pins, a greater frictional engagement can be achieved and the guide pins also do not work into the ring material, for example plastic, so quickly.

Due to the advantageous length of the guide pins, a further increased friction between the adapter ring and the lighting fixture can be achieved, which serves for a tight fit of the lighting fixture. However, further variations in the shape and size of the fastening means are conceivable.

The guide pins have, for example, different lengths and / or diameters, at least in sections, so that the lighting fixture can be fixed in only one direction specified by this configuration. In order to ensure that the lighting fixture can be fixed in only one direction specified by this configuration, the guide pins are alternatively or additionally arranged asymmetrically.

The lighting fixture preferably further comprises at least one heat sink. This serves to cool the lighting fixture, which heats up particularly when the illuminant is in operation. For example, the lighting fixture is directly connected to the heat sink. The lighting fixture can have, for example, an interface, in particular a standardized interface, which can be connected to a large number of different heat sinks, the choice of the heat sink preferably being based on the available space. The heat sink preferably has a round shape when viewed in cross section transverse to the longitudinal axis of the heat sink. However, other cross-sectional shapes are also conceivable, such as an oval shape or square and other polygon shapes. The shape is preferably variable depending on the location and space. The heat sink can, for example, comprise at least one fan and / or have cooling fins.

The head section of the lighting fixture, which is equipped with the at least one lamp, preferably serves not only as a holder for the at least one lamp, but also as a heat conductor for the heat emitted by the lamp. In particular, the illuminant emits heat to a printed circuit board, which in turn emits the heat to the head section of the lighting fixture, which in turn transmits this heat to the heat sink. Good heat conduction has the advantage that good LED efficiency is achieved and that the lifespan of the LED is increased.

The heat sink is preferably fastened to the lighting body by means of at least one fastening means. The heat sink can preferably be fixable on the base section of the lighting fixture, in particular on a connection section. The inner lateral surface of the receptacle of the heat sink is designed, for example, in accordance with an outer lateral surface of the connection section of the lighting body. Starting from a bottom side of the receptacle of the heat sink, a passage cutout is preferably introduced, through which a fastening means, for example a screw or a locking pin, can be passed from the outside and can be inserted or screwed into an opening in the lighting body. The heat sink can thereby be fastened to the base section in such a way that an outer lateral surface of the base section is clamped against an inner lateral surface of the receptacle of the heat sink. Thus, the heat sink can be attached extremely easily, since only one fastening means is necessary and, at the same time, centering takes place when screwing down.

In a further exemplary embodiment of the invention, the heat sink is fastened to the base section of the lighting fixture, the base section having a preferably conical or truncated cone-shaped connection section and the heat sink having a preferably conical or truncated cone-shaped receptacle. The connection section of the base section is preferably used in a corresponding receptacle of the heat sink. The connection section is, for example, conical or frustoconical and tapers in one direction to the heat sink. The connecting section preferably adjoins the cylindrical or circular-cylindrical section or the receiving section. The inner lateral surface of the receptacle of the heat sink is designed, for example, in accordance with an outer lateral surface of the connection section of the lighting body. The inner circumferential surface is preferably conical or frustoconical, so that the connection section and the receptacle can lie flat on one another and can be centered with little effort.

According to an exemplary embodiment, the lighting device comprises at least two illuminants which are arranged in a line along an arrangement direction, in particular in a straight line, in order to represent an incandescent filament and to effectively imitate the illumination of an incandescent light source. In some embodiments, a single illuminant can be provided, the illuminant having, for example, an elongated shape, the longitudinal direction corresponding to the direction of expansion of a filament.

In a further embodiment, the at least one light source comprises at least one light-emitting diode, LED. With the advent of LEDs as an economical and effective light source for vehicle lighting, properties and lighting effects were also possible that would not be practical or not possible with more conventional light sources. LEDs are relatively inexpensive, have a long lifespan and offer low power consumption compared to alternative light sources. In addition to simply switching on and off, LED lights can be controlled so that certain effects, such as the change in light intensity, and / or color changes can be achieved with color-changing LEDs, in particular RGB LED lights. An LED can be in the form of at least one individually packaged LED or in the form of at least one LED chip that has one or more light-emitting diodes, or in the form of a micro-LED. The LEDs preferably emit white light in the standardized ECE white field of the automotive industry, for example implemented by a blue emitter and a yellow / green converter.

In a further embodiment, the direction of illumination further comprises an elastic element. The elastic element is preferably provided between the shoulder of the base section and the adapter ring, so that the adapter ring can be supported on the shoulder via the elastic element. This allows tolerances between the adapter ring and the lighting fixture to be compensated for in a simple manner. In addition, the adapter ring can be pressed in the direction of the fastening means, preferably the guide pins, of the lighting fixture by means of the elastic element. Vibrations can also be compensated for with the help of the elastic element. The elastic element is designed, for example, as a ring, sealing element or spring. The elastic element is preferably made of an elastomer. The elastic element can be applied directly to the shoulder or lie on the shoulder as a (e.g. rubber) ring.

A headlamp according to the invention in accordance with the third teaching of the present invention preferably has at least one optical element. For example, it can be a refractive element, e.g. a lens, and / or a reflective element, e.g. a reflector, act.

In a further embodiment, the adapter ring is attached to the optical element, the adapter ring being attached to the optical element in particular via a further elastic element, preferably a spring. For example, it is possible for the lighting device according to the invention to be attached to an already existing optical element, preferably to a reflector, of a conventional light source. The adapter ring can, for example, be attached to an existing optical element such that it can be detachably fixed by at least one clamp, at least one clip and / or by at least one spring.

The lighting device according to the invention, the adapter ring according to the invention and / or the headlight according to the invention can be particularly suitable for use in the automotive sector, for example for use in vehicle lighting, e.g. configured as a vehicle headlight. With the help of the invention, a simple, safe and precise fixation of a lighting fixture in an adapter ring or in a headlight can be achieved. The present invention is characterized in particular by an improved stability of the lighting arrangement and a higher durability or longer service life of the components.

The features and exemplary implementations of the invention described above may equally relate to the various teachings according to the present invention.

It is to be understood that the presentation of the invention in this section is only exemplary and not restrictive.

Further features of the invention will become apparent from the following detailed description, which is considered in conjunction with the accompanying drawings. However, it is to be understood that the drawings are for illustration purposes only and not as a definition of the limits of the invention, for which reference should be made to the appended claims. It is further understood that the drawings are not drawn to scale and that they are only used to conceptually illustrate the structures and methods described herein.

Figure list

• 1 eine schematische Darstellung eines ersten Ausführungsbeispiels der erfindungsgemäßen Beleuchtungsvorrichtung in einer Seitenansicht zeigt;
• 2 eine schematische Darstellung eines zweiten Ausführungsbeispiels der erfindungsgemäßen Beleuchtungsvorrichtung in einer schrägen Draufsicht zeigt;
• 3 eine schematische Darstellung eines ersten Ausführungsbeispiels des erfindungsgemäßen Adapterrings in Draufsicht zeigt; und
• 4 ein erstes Ausführungsbeispiel eines erfindungsgemäßen Scheinwerfers mit einer Lampenaufnahme und einer Beleuchtungsvorrichtung in einem Einbauzustand in einer Rückansicht zeigt.

Examples of the invention will now be described in detail with reference to the accompanying drawing, in which:

• 1 shows a schematic representation of a first embodiment of the lighting device according to the invention in a side view;
• 2nd a schematic representation of a second embodiment of the lighting device according to the invention in an oblique plan view;
• 3rd shows a schematic representation of a first embodiment of the adapter ring according to the invention in plan view; and
• 4th shows a first embodiment of a headlamp according to the invention with a lamp holder and a lighting device in an installed state in a rear view.

DETAILED DESCRIPTION OF SOME EXEMPLARY EMBODIMENTS

The following description is intended to deepen the understanding of the present invention and is to be understood as a supplement and to be read together with the description in the summary section above of this description.

1 shows a lighting device comprising a lighting fixture 1 that has a head section 1a and a base section 1b has at least one lamp 2nd , the illuminant 2nd on one side of the head section 1a of the lighting fixture 1 is provided, as well as a heat sink 4th on the lighting fixture 1 is attached. The head section 1a and the base section 1b form the lighting fixture 1 , which is integrally formed.

The lighting device comprises in particular two or more lamps 2nd , preferably as light emitting diodes 8th are formed, the lamps 2nd in a preferably straight line on the head section 1a of the lighting fixture 1 are arranged to emulate the filament of a conventional incandescent lamp and thus effectively imitate the lighting of a conventional incandescent lamp.

On the head section 1a subsequent end of the base section 1b is a shoulder 1f on the base section 1b formed on which an adapter ring (not shown) can be axially supported. The lighting fixture 1 points to the base portion 1b also pin-shaped fasteners 1c , 1d , 1e on, which are particularly barrel-shaped.

The base section is present 1b with its connection section (not shown) in a receptacle (not shown) of a heat sink 4th used. The heat sink 4th in the present case has a round or oval shape seen in cross section transverse to the longitudinal axis of the heat sink. In addition, the heat sink 4th horizontally running cooling fins.

In 2nd a second embodiment of the lighting device according to the invention is shown. This includes the lighting fixture 1 and the heat sink 4th also an adapter ring 3rd in which the lighting fixture 1 in the present case by means of the fastening means 1c , 1d , 1e of the base section 1b of the lighting fixture 1 is fixed. In the embodiment shown, the adapter ring 3rd three cutouts 3a , 3b , 3c for the positive reception of the fasteners 1c , 1d , 1f on. This serves as the adapter ring 3rd for attaching the lighting fixture 1 in a lamp holder 5 (see 4th ). The adapter ring 3rd this embodiment is for example for a lamp holder 5 according to H7 provided and adapted.

The adapter ring 3rd lies in particular on the base section 1b trained shoulder 1f on. Between adapter ring 3rd and shoulder 1f there is also an elastic element (not shown), preferably made of elastomer, which is annular. The adapter ring is placed over the elastic element 3rd on the shoulder 1f supported. This can cause tolerances between the adapter ring 3rd and the lighting fixture 1 as well as any vibrations that occur.

3rd shows an adapter ring 3rd according to an embodiment of the second teaching of the present invention. In contrast to conventional adapter rings, as are known from the prior art, the adapter ring according to the invention has 3rd three or more recesses 3a , 3b , 3c on. These are in particular designed such that fastening means 1c , 1d , 1e form-fitting in the recesses 3a , 3b , 3c can intervene. The outside of the adapter ring 3rd is also configured so that the adapter ring 3rd for releasable attachment of a lighting fixture 1 in a preferably standardized lamp holder 5 (see 4th ), for example a lamp holder of a vehicle headlight. The lighting fixture 1 can by means of the adapter ring 3rd For example, be attached to a lamp holder of a vehicle headlight.
In 4th is a lighting device with a round heat sink in cross section 4th in an installed state in a lamp holder 5 a headlight 6 shown. The adapter ring 3rd is in the present embodiment, with the help of an elastic element 9 in the lamp holder 5 , on an optical element 7 attached, wherein the optical element is a reflector. In order to efficiently dissipate the heat from the LED, the heat sink should 4th be as large as possible. This can lead to space problems during installation, which is why other cross-sectional shapes of the heat sink 4th are conceivable, such as an oval shape or square and other polygon shapes. The shape is preferably variable depending on the location and space. The heat sink 4th in the present example also includes a fan and cooling fins.

Reference list

1

Lighting fixtures

1a

Head section

1b

Base section

1c, 1d, 1e

Fasteners

1f

shoulder

2nd

Illuminant

3rd

Adapter ring

3a, 3b, 3c

Recesses

4th

Heatsink

5

Lamp holder

6

Headlights

7

optical element

8th

light emitting diode

9

elastic element

Claims (16)

Lighting device comprising - a lighting fixture (1) which has a head section (1a) and a base section (1b), - at least one illuminant (2), the illuminant (2) being provided on the head section (1a) of the lighting fixture (1) , and - at least one adapter ring (3), wherein the adapter ring (3) is provided for fastening the lighting device in a lamp holder (5), characterized in that the adapter ring (3) has three or more cutouts (3a, 3b, 3c). Lighting device after Claim 1 , characterized in that the adapter ring (3) on the base portion (1b) of the lighting fixture (1) can be fixed. Lighting device after Claim 1 or 2nd , characterized in that a shoulder (1f) is formed on the base section (1b), the adapter ring (3) being axially supported on the shoulder (1f). Lighting device after Claim 1 or 2nd , characterized in that the adapter ring (3) is wave-shaped. Lighting device after Claim 1 or 2nd , characterized in that the lighting fixture (1) has three or more fastening means (1c, 1d, 1e), the fastening means (1c, 1d, 1e) of the lighting fixture (1) for positive engagement in the recesses (3a, 3b, 3c ) of the adapter ring (3) are designed. Lighting device after Claim 5 , characterized in that the fastening means (1c, 1d, 1e) are formed on the base section (1b) of the lighting fixture (1). Lighting device after Claim 5 , characterized in that the fastening means (1c, 1d, 1e) are designed as guide pins, the guide pins preferably having a length of 1 to 3 mm. Lighting device after Claim 1 or 2nd , characterized in that the lighting device further comprises: - at least one heat sink (4). Lighting device after Claim 8 , characterized in that the heat sink (4) is fastened to the lighting body (1) by means of at least one fastening means. Lighting device after Claim 8 , characterized in that the heat sink (4) is fastened to the base section (1b) of the lighting body (1), the base section (1b) having a conical or frustoconical connection section and the heat sink (4) preferably having a conical or frustoconical receptacle. Lighting device after Claim 1 or 2nd , characterized in that the at least one illuminant (2) comprises at least one light emitting diode (8). Lighting device after Claim 1 or 2nd , characterized in that the lighting device further comprises: - an elastic element. Adapter ring (3) for attaching a lighting device according to one of the Claims 1 to 12th in a lamp holder (5). Headlamp (6) comprising a lighting device according to one of the Claims 1 to 12th . Headlights (6) after Claim 14 , characterized in that the headlight (6) has at least one optical element (7). Headlights (6) after Claim 15 , characterized in that the adapter ring (3) is attached to the optical element (7) via a further elastic element (9).

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