EP2095016B1 - Illumination unit for vehicle headlights, and vehicle headlight - Google Patents

Illumination unit for vehicle headlights, and vehicle headlight Download PDF

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Publication number
EP2095016B1
EP2095016B1 EP07822788.1A EP07822788A EP2095016B1 EP 2095016 B1 EP2095016 B1 EP 2095016B1 EP 07822788 A EP07822788 A EP 07822788A EP 2095016 B1 EP2095016 B1 EP 2095016B1
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EP
European Patent Office
Prior art keywords
luminaire
bore
housing
reflector
illumination unit
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.)
Active
Application number
EP07822788.1A
Other languages
German (de)
French (fr)
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EP2095016A1 (en
Inventor
Peter Frey
Ralf Vollmer
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
Osram GmbH
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Publication date
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Publication of EP2095016A1 publication Critical patent/EP2095016A1/en
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Publication of EP2095016B1 publication Critical patent/EP2095016B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/19—Attachment of light sources or lamp holders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • F21V19/003—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
    • F21V19/0035—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources the fastening means being capable of simultaneously attaching of an other part, e.g. a housing portion or an optical component
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices
    • F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the invention relates to a lamp according to the preamble of claim 1 and a vehicle headlight.
  • Such a lighting unit and such a vehicle headlights are for example in the WO 2006/066530 A1 disclosed.
  • This publication describes a lighting unit with at least one LED chip, designed as a heat sink housing which surrounds the at least one LED chip partially, and a holder for fixing the at least one LED chip with respect to the heat sink in a unique position and orientation, wherein the heat sink with fastening means for mounting the lighting unit is provided in a vehicle headlight.
  • the fasteners together with appropriate fasteners on the headlight bayonet lock.
  • the EP 1 715 242 A2 discloses a circuit board lighting, the housing has a housing shell with through holes for receiving Einpressiten and a rear wall, on the inside of a light-emitting diode is arranged, which receives its power supply from the Einpressiten ago.
  • the luminaire according to the invention has a reflector and an illumination device, wherein the illumination unit comprises at least one light-emitting diode chip and a housing which at least partially surrounds the at least one light-emitting diode chip.
  • the luminaire according to the invention has fastening means for mounting the lighting unit on the reflector.
  • the fastening means comprise according to the invention at least one projection or recess, which is arranged on the housing and with a matching matched counterpart to a luminaire part, for. B. on a reflector of the lamp, cooperate such that the at least one projection or the at least one recess and the counterpart fit into each other.
  • the at least one projection or the at least one recess and the matching matched counterpart is easily a precise alignment of the illumination unit and its at least one LED chip and possibly one placed on the at least one LED chip primary optics with respect to the luminaire portion and the reflector and allows in particular with respect to the optical axis of the lamp or the light-reflecting surfaces of the reflector.
  • the at least one projection or the at least one recess on the housing of the lighting unit with a first bore and the matching counterpart on the luminaire part or reflector of the luminaire with a second bore, equipped for producing a connection, preferably a screw, between the Lighting unit and the luminaire part or reflector serve.
  • the edge of the first bore forming portion of the housing and the edge of the second bore forming portion of the reflector is formed so that they fit into each other.
  • the two aforementioned bores and the fittingly interlocking edges of these bores By means of the two aforementioned bores and the fittingly interlocking edges of these bores, a precise alignment of the illumination unit and its at least one light-emitting diode chip and possibly a primary optic placed on the at least one light-emitting diode chip is achieved in a simple manner with respect to the reflector and in particular with respect to the optical axis of the reflector
  • the light reflecting surfaces of the reflector allows, as the first and second holes can be made very precise, so that only small tolerances of fractions of a millimeter occur in their position and their diameter.
  • the bores are therefore suitable as a reference for the adjustment of the light-emitting diode chip of the illumination unit or the primary optics associated therewith with respect to the light-reflecting surfaces of the reflector.
  • the fastening means according to the invention can be used independently of the shape of the electrical connections of the lighting unit. In particular, they are also suitable for lighting units which have electrical connection
  • the first bore or or and the second bore is formed narrowed stepwise in order to ensure the fitting meshing of the edge regions of the holes in the housing of the lighting unit and the reflector.
  • the narrower portion of the holes for making a connection, such as a screw, between the lighting unit and the reflector can be used, while the other portion of the first or second hole for the proper assembly of lighting unit and reflector is responsible for precise alignment.
  • the second bore is preferably arranged on the rear side remote from the light exit opening of the reflector, so that the illumination unit on the Rear side of the reflector can be mounted and the LED chip and the primary optics protrudes through a breakthrough in the reflector. As a result, light shading by the fastening means for the lighting unit is avoided.
  • the at least one projection or the at least one recess is formed by a wall of the housing of the lighting unit and the matching counterpart of guide elements arranged on the luminaire part, in particular on the reflector, which are in contact with the wall.
  • the fastening means of the lighting unit at least two projections or recesses, which are arranged on the housing and which are provided for mounting the lighting unit in the lamp to interact with matching matched counterparts on a light portion of the lamp such that the Protrusions or the recesses and the counterparts fit into each other. This ensures a clear installation position of the lighting unit and in particular prevents a rotational movement.
  • the lighting unit comprises a pot-shaped, substantially cylindrically symmetrical housing 100 made of aluminum with a circular disk-like bottom 101 and a, formed on the bottom 101 side wall 102 which extends along the lateral surface of a cylinder.
  • the housing 100 is designed in particular as an aluminum die cast part.
  • the bottom 101 of the housing 100 has on its inside an integrally formed with the bottom 101 elevation 103, which has a high central portion 1030 and two lower lying plateaus 1031, 1032 has.
  • the top of the central portion 1030 has a greater height above the bottom 101 of the housing 100 than the two, on different sides of the central portion arranged plateau 1031, 1032.
  • the top of the central portion forms a support surface for a support plate 2 made of ceramic, which serves as a carrier for five
  • the support plate 2 ensures electrical insulation between the metallic housing 100, in particular the elevation 103, and the light-emitting diode chips 3.
  • the five light-emitting diode chips 3 are arranged on the carrier plate 2 in a row and from the walls surrounded by a frame.
  • the light-emitting diode chips 3 emit blue light and are provided with a phosphor coating (chip layer coating) in order to convert the wavelength of a part of the electromagnetic radiation generated by the light-emitting diode chips 3, so that the illumination device emits white light during its operation.
  • the light-emitting diode chips 3 are, for example, thin-film light-emitting diode chips whose basic principle is described, for example, in US Pat Reference I. Schnitzer et al., Appl. Phys. Lett. 63 (16), 18 October 1993, 2174-2176 is described.
  • the carrier plate 2 is glued by means of a placement machine on the top of the central portion 1030 of the elevation 103 at a predetermined distance and in a well-defined orientation with respect to a arranged on the first plateau 1031, hollow cylindrical web 105 and a disposed on the second plateau 1032 elongated hole 104.
  • the support plate 2 with the light-emitting diode chips 3 arranged thereon is arranged between the oblong hole 104 and the hollow-cylindrical web 105.
  • the slot 104 and the hollow cylindrical web 105 serve to align a dome-like primary optics 400 (FIG. FIGS. 4 and 5 ), which is placed over the light-emitting diode chips 3, so that the light emitted by the light-emitting diode chips 3 or the light-emitting diodes is coupled into the primary optics 400.
  • the primary optics 400 are a translucent, dome-like cover for the light-emitting diode chips 3.
  • the primary optics 400 has two webs 401, 402 which engage in the slot 104 and the hollow-cylindrical web 105 in an appropriate manner.
  • the top or the end of the hollow cylindrical web 105 serves the primary optics 400 as a support surface.
  • Another support surface for the primary optics 400 is from a Web 106 formed with an oval cross section, which is disposed on the first plateau 1031, adjacent to the hollow cylindrical web 105 and the slot 104.
  • the top of the cylindrical hollow web 105 and the web 106 with oval transverse web have the same height above the housing bottom 101 as the top of the central portion 1030.
  • first 1031 and second plateau 1032 two opposing pins 107, 108 are further arranged in the openings 403 , 404 engage the edge of the primary optics 400 to fix them to the housing 100.
  • the elevation 103 has two ear-like projections 109, 110 arranged on different sides of the plateau 1031, each with a pin 1090, 1100.
  • the pins 1090, 1100 are used for riveting a mounting board 500, which rests on the top of the first 1031 and second plateau 1032 and on three other, each provided with a pin 1110, 1120, 1130 bearing surfaces 111, 112, 113.
  • the abovementioned contact surfaces 111, 112, 113 are arranged equidistantly along the inside of an annular web 114 running on the inside of the side wall 102.
  • the mounting board 500 ( FIG. 6 ) has two substantially rectangular openings 501, 502, through which the central portion 1030 and the webs 105, 106 and the pins 107, 108 protrude.
  • the components of an operating device for the LED chips 3 are mounted on the mounting board.
  • the operating device comprises a driver circuit for powering the LED chips 3 and a voltage converter for supplying power to the driver circuit from the vehicle electrical system voltage of the motor vehicle.
  • a trough 115 is formed in the elevation 103, which is filled with a heat-conductive paste.
  • a temperature-dependent resistor (not shown), in particular a so-called NTC (resistance with negative temperature characteristic), arranged, which is in contact with the heat-conductive paste and serves as a temperature sensor to the operating temperature of the LED chips. 3 to eat.
  • the side wall 102 has three recesses 1021, 1022, 1023 arranged along the circumference of the housing 100, in each of which a surface 120, 130, 140 extending parallel to the housing bottom 101 is arranged. These surfaces 120, 130, 140 are located at the same height above the housing bottom 101 and are each bounded by a directed into the interior of the housing 100 recess 1141, 1142, 1143 of the annular ridge 114. In the first surface 120 a continuous, in the direction of the housing bottom 101 step-narrowed bore 121 is arranged, which extends from the surface 120 to the outside of the housing bottom 101.
  • the bore 121 is formed such that in the surface 120 a circular cylindrical recess 122 is arranged, whose outer radius corresponds to the first, large radius of the bore 121 and the inner radius of the second, small radius of the bore.
  • the depth of the bore 121 is only a few millimeters in the region of the first, large radius, while the region of the bore 121 in the region of the second, small radius extends from the bottom of the depression 122 to the outside of the housing bottom 101. That is, the height of the bottom of the recess 122 above the housing bottom 101 is only a few millimeters less than the height of the surfaces 120, 130, 140 above the housing bottom 101.
  • the housing bottom 101 In the other two surfaces 130, 140 is also in each case a through bore 131th , 141, whose radius coincides with the radius of the narrow portion of the first bore 121, respectively.
  • two apertures 150 are further arranged, which serve for the passage of electrical connection cables for the power supply of mounted on the mounting board components of the operating device.
  • the housing bottom 101 preferably has three further holes for fastening a heat sink (not shown).
  • the recess 122 is adapted to receive an appropriately matched, at the back 201 of in FIG. 3 pictured reflector 200 of the vehicle headlamp molded hollow web 210 is provided.
  • the outer diameter of this hollow web 210 is matched to the first, large radius of the bore 121, that is, to the radius of the recess 122.
  • a borehole 211 is arranged, whose radius is identical to the second, small radius of the bore 121 and which serves to screw the housing 100 of the lighting unit with the reflector 200.
  • the screwing is carried out from the outside of the housing bottom 101, wherein the screw is introduced at the outside or back of the bottom 101 in the narrowed portion of the bore 121 and by the screwing finally into the coaxial with the narrow portion of the bore 121 arranged well 211 of Hollow web 210 penetrates.
  • the hollow web 210 thus fits snugly into the widened region 122 of the bore 121, so that the position of the hollow web 210 and the stepped bore 121 can serve as a reference for the orientation of the illumination unit or the light-emitting diode chips 3 with respect to the reflector 200.
  • the reflector 200 has on its rear side 201 an annular flange 202 whose dimensions are matched to the annular web 114 of the lighting unit.
  • a sealing ring 600 made of rubber or silicone, which rests after mounting the lighting unit to the annular flange 202 with a press fit. That is, after mounting the illumination unit in the vehicle headlamp, the seal ring is disposed between the annular flange 202 of the reflector 200 and the annular bridge 114 of the illumination unit.
  • each with a borehole 221, 231 provided hollow webs 220, 230 are arranged, which are aligned for mounting the lighting unit so that the boreholes 221 and 231 are arranged coaxially to the bores 131 and 141, in order to be able to insert in each case one screw from the outside or rear side of the housing bottom 101 into the bores 131 or 141 and the boreholes 221 and 231, respectively.
  • the heads of the screws stuck in the bores 121, 131, 141 bear against the outside or rear side of the housing bottom 101 and their tips extend into the boreholes 211, 221, 231 of the corresponding hollow webs 210, 220, 230, to make a screw connection between the housing 100 of the illumination device and the reflector 200 by means of these screws.
  • the first hollow web 210 is formed longer than the other two hollow webs 220, 230 and has a stepped end portion with reduced outer diameter, because it fits into the recess 122 in the surface 120 passes.
  • a pin 203 is formed, which in a groove 1024 in the side wall 102 of the housing 100 of the illumination unit engages.
  • the pin 203 is diametrically opposite the first hollow web 210.
  • the groove 1024 of the support surface 120 is diametrically opposite.
  • the groove 1024 and the pin 203 together with the first hollow web 210 and the stepped bore 121 prevent rotation of the lighting unit about its axis of symmetry.
  • a substantially rectangular opening 204 is arranged through which project the LED chips 3 and the primary optics 400 mounted thereon after the mounting of the illumination unit, so that the light emitted by the LED chips 3, after passing through the primary optics 400 incident on the light reflecting surfaces of the reflector 200.
  • the reflector 200 with the illumination unit mounted thereon are part of a vehicle headlamp, preferably a foglamp or a headlamp for daytime running lights or for high beam or low beam.
  • FIG. 8 a second embodiment of a reflector 200 'is shown, which instead of the in FIG. 3 pictured reflector 200 together with in the FIGS. 1 . 2 . 4, 5 . 6 and 7 illustrated lighting unit can be used to form a vehicle headlight according to the invention.
  • the in FIG. 8 Reflector 200 'shown differs from that in FIG. 3 illustrated reflector 200 only in that it has three equidistant along the outer circumference of the annular flange 202 arranged webs 203 ', which extend parallel to the ring axis of the flange 202 and abut the outside of the wall 102 of the housing 100 of the lighting unit. They serve instead of the pin 203 according to the reflector 200 of the in FIG. 3 pictured first embodiment as further guide elements for the exact alignment of reflector 200 'and lighting unit.
  • FIG. 3 shows a third exemplary embodiment of a reflector 200 "which, instead of the one shown in FIG. 3 pictured reflector 200 or instead of in FIG. 8 pictured reflector 200 'together with in the FIGS. 1 . 2 . 4, 5 . 6 and 7 illustrated lighting unit can be used to a inventive To make vehicle headlights.
  • the in FIG. 9 pictured reflector 200 "differs from that in FIG.
  • FIG. 8 illustrated reflector 200 ' only in that it has three similar hollow webs 210 ", 220, 230 for the screw connection of lighting unit and reflector and has been dispensed with the extended hollow web 210 with the end portion with reduced outer diameter.
  • the orientation of illumination unit and reflector 200" is here only by the proper fit of the three webs 210 ", 220, 230 and the wall 102 of the housing 100 of the lighting unit and with the help of the pin 203, as in the FIG. 3 figured embodiment serves to engage in the groove 1024 of the wall 102 of the housing 100 of the lighting unit, guaranteed.
  • a cooling device which consists for example of cooling fins or is designed as a heat sink, be mounted.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Description

Die Erfindung betrifft eine Leuchte gemäß dem Oberbegriff des Anspruchs 1 und einen Fahrzeugscheinwerfer.The invention relates to a lamp according to the preamble of claim 1 and a vehicle headlight.

I. Stand der Technik I. State of the art

Eine derartige Beleuchtungseinheit und ein derartiger Fahrzeugscheinwerfer sind beispielsweise in der WO 2006/066530 A1 offenbart. Diese Offenlegungsschrift beschreibt eine Beleuchtungseinheit mit mindestens einem Leuchtdiodenchip, einem als Kühlkörper ausgebildeten Gehäuse, das den mindestens einen Leuchtdiodenchip teilweise umgibt, und einer Halterung zur Fixierung des mindestens einen Leuchtdiodenchips bezüglich des Kühlkörpers in einer eindeutigen Lage und Ausrichtung, wobei der Kühlkörper mit Befestigungsmitteln zur Montage der Beleuchtungseinheit in einem Fahrzeugscheinwerfer versehen ist. Die Befestigungsmittel bilden zusammen mit entsprechenden Befestigungsmitteln am Scheinwerfer einen Bajonettverschluss.Such a lighting unit and such a vehicle headlights are for example in the WO 2006/066530 A1 disclosed. This publication describes a lighting unit with at least one LED chip, designed as a heat sink housing which surrounds the at least one LED chip partially, and a holder for fixing the at least one LED chip with respect to the heat sink in a unique position and orientation, wherein the heat sink with fastening means for mounting the lighting unit is provided in a vehicle headlight. The fasteners together with appropriate fasteners on the headlight bayonet lock.

Die EP 1 715 242 A2 offenbart eine Leiterplattenbeleuchtung, deren Gehäuse einen Gehäusemantel mit durchgehenden Bohrungen zur Aufnahme von Einpressstiften und eine Rückwand aufweist, an deren Innenseite eine Leuchtdiode angeordnet ist, die ihre Stromversorgung von den Einpressstiften her erhält.The EP 1 715 242 A2 discloses a circuit board lighting, the housing has a housing shell with through holes for receiving Einpressstiften and a rear wall, on the inside of a light-emitting diode is arranged, which receives its power supply from the Einpressstiften ago.

II. Darstellung der Erfindung II. Presentation of the invention

Es ist Aufgabe der Erfindung, eine gattungsgemäße Leuchte mit vereinfachter Montage und einen entsprechenden Fahrzeugscheinwerfer bereitzustellen.It is an object of the invention to provide a generic lamp with simplified installation and a corresponding vehicle headlight.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruchs 1 gelöst. Besonders vorteilhafte Ausführungen der Erfindung sind in den abhängigen Ansprüchen beschrieben.This object is achieved by the features of claim 1. Particularly advantageous embodiments of the invention are described in the dependent claims.

Die erfindungsgemäße Leuchte besitzt einen Reflektor und eine Beleuchtungseinrichtung, wobei die Beleuchtungseinheit mindestens einen Leuchtdiodenchip und ein den mindestens einen Leuchtdiodenchip zumindest teilweise umgebendes Gehäuse umfasst. Außerdem besitzt die erfindungsgemäße Leuchte Befestigungsmittel zur Montage der Beleuchtungseinheit am Reflektor. Die Befestigungsmittel umfassen erfindungsgemäß mindestens einen Vorsprung oder eine Vertiefung, der bzw. die am Gehäuse angeordnet ist und die mit einem passgerecht darauf abgestimmten Gegenstück an einem Leuchtenteil, z. B. an einem Reflektor der Leuchte, derart zusammen wirken, dass der mindestens eine Vorsprung bzw. die mindestens eine Vertiefung und das Gegenstück passgerecht ineinander greifen.The luminaire according to the invention has a reflector and an illumination device, wherein the illumination unit comprises at least one light-emitting diode chip and a housing which at least partially surrounds the at least one light-emitting diode chip. In addition, the luminaire according to the invention has fastening means for mounting the lighting unit on the reflector. The fastening means comprise according to the invention at least one projection or recess, which is arranged on the housing and with a matching matched counterpart to a luminaire part, for. B. on a reflector of the lamp, cooperate such that the at least one projection or the at least one recess and the counterpart fit into each other.

Mittels des mindestens einen Vorsprungs bzw. der mindestens einen Vertiefung und dem passgerecht darauf abgestimmten Gegenstück wird auf einfache Weise eine exakte Ausrichtung der Beleuchtungseinheit und ihres mindestens einen Leuchtdiodenchips sowie ggf. einer auf dem mindestens einen Leuchtdiodenchip aufgesetzten Primäroptik bezüglich des Leuchtenteils bzw. des Reflektors und insbesondere bezüglich der optischen Achse der Leuchte bzw. der Licht reflektierenden Flächen des Reflektors ermöglicht.By means of the at least one projection or the at least one recess and the matching matched counterpart is easily a precise alignment of the illumination unit and its at least one LED chip and possibly one placed on the at least one LED chip primary optics with respect to the luminaire portion and the reflector and allows in particular with respect to the optical axis of the lamp or the light-reflecting surfaces of the reflector.

Vorteilhafterweise ist der mindestens eine Vorsprung bzw. die mindestens eine Vertiefung am Gehäuse der Beleuchtungseinheit mit einer ersten Bohrung und das passgerechte Gegenstück am Leuchtenteil bzw. Reflektor der Leuchte mit einer zweiten Bohrung, ausgestattet, die zur Herstellung einer Verbindung, vorzugsweise einer Schraubverbindung, zwischen der Beleuchtungseinheit und dem Leuchtenteil bzw. Reflektor dienen.Advantageously, the at least one projection or the at least one recess on the housing of the lighting unit with a first bore and the matching counterpart on the luminaire part or reflector of the luminaire with a second bore, equipped for producing a connection, preferably a screw, between the Lighting unit and the luminaire part or reflector serve.

Gemäß zweier bevorzugter Ausführungsbeispiele der Erfindung ist der den Rand der ersten Bohrung bildende Abschnitt des Gehäuses und der den Rand der zweiten Bohrung bildende Abschnitt des Reflektors so ausgebildet, dass sie passgerecht ineinander greifen.According to two preferred embodiments of the invention, the edge of the first bore forming portion of the housing and the edge of the second bore forming portion of the reflector is formed so that they fit into each other.

Mittels der beiden vorgenannten Bohrungen und der passgerecht ineinander greifenden Ränder dieser Bohrungen wird auf einfache Weise eine exakte Ausrichtung der Beleuchtungseinheit und ihres mindestens einen Leuchtdiodenchips sowie ggf. einer auf dem mindestens einen Leuchtdiodenchip aufgesetzten Primäroptik bezüglich des Reflektors und insbesondere bezüglich der optischen Achse des Reflektors bzw. der Licht reflektierenden Flächen des Reflektors ermöglicht, da die erste und zweite Bohrung sehr präzise ausgeführt werden können, so dass nur geringe Toleranzen von Bruchteilen eines Millimeters bei ihrer Lage und ihrem Durchmesser auftreten. Die Bohrungen eignen sich daher als Referenz für die Justage des Leuchtdiodenchips der Beleuchtungseinheit bzw. der ihm zugeordneten Primäroptik bezüglich den Licht reflektierenden Flächen des Reflektors. Die erfindungsgemäßen Befestigungsmittel können ferner unabhängig von der Form der elektrischen Anschlüsse der Beleuchtungseinheit verwendet werden. Insbesondere eignen sie sich auch für Beleuchtungseinheiten, die anstelle der im Stand der Technik offenbarten Kontaktpins elektrische Anschlusskabel aufweisen.By means of the two aforementioned bores and the fittingly interlocking edges of these bores, a precise alignment of the illumination unit and its at least one light-emitting diode chip and possibly a primary optic placed on the at least one light-emitting diode chip is achieved in a simple manner with respect to the reflector and in particular with respect to the optical axis of the reflector The light reflecting surfaces of the reflector allows, as the first and second holes can be made very precise, so that only small tolerances of fractions of a millimeter occur in their position and their diameter. The bores are therefore suitable as a reference for the adjustment of the light-emitting diode chip of the illumination unit or the primary optics associated therewith with respect to the light-reflecting surfaces of the reflector. Furthermore, the fastening means according to the invention can be used independently of the shape of the electrical connections of the lighting unit. In particular, they are also suitable for lighting units which have electrical connection cables instead of the contact pins disclosed in the prior art.

Vorteilhafterweise ist die erste Bohrung oder bzw. und die zweite Bohrung stufenartig verengt ausgebildet, um das passgerechte Ineinandergreifen der Randbereiche der Bohrungen in dem Gehäuse der Beleuchtungseinheit und des Reflektors zu gewährleisten. Insbesondere kann der engere Abschnitt der Bohrungen zur Herstellung einer Verbindung, beispielsweise einer Schraubverbindung, zwischen der Beleuchtungseinheit und dem Reflektor genutzt werden, während der weitere Abschnitt der ersten oder zweiten Bohrung für das passgerechte Zusammenfügen von Beleuchtungseinheit und Reflektor mit präziser Ausrichtung verantwortlich ist.Advantageously, the first bore or or and the second bore is formed narrowed stepwise in order to ensure the fitting meshing of the edge regions of the holes in the housing of the lighting unit and the reflector. In particular, the narrower portion of the holes for making a connection, such as a screw, between the lighting unit and the reflector can be used, while the other portion of the first or second hole for the proper assembly of lighting unit and reflector is responsible for precise alignment.

Die zweite Bohrung ist vorzugsweise an der von der Lichtaustrittsöffnung abgewandten Rückseite des Reflektors angeordnet, so dass die Beleuchtungseinheit an der Rückseite des Reflektors montiert werden kann und der Leuchtdiodenchip sowie die Primäroptik durch einen Durchbruch im Reflektor hindurchragt. Dadurch wird eine Lichtabschattung durch die Befestigungsmittel für die Beleuchtungseinheit vermieden.The second bore is preferably arranged on the rear side remote from the light exit opening of the reflector, so that the illumination unit on the Rear side of the reflector can be mounted and the LED chip and the primary optics protrudes through a breakthrough in the reflector. As a result, light shading by the fastening means for the lighting unit is avoided.

Gemäß einem alternativen weiteren Ausführungsbeispiel der Erfindung wird der mindestens eine Vorsprung bzw. die mindestens eine Vertiefung von einer Wand des Gehäuses der Beleuchtungseinheit und das passgerechte Gegenstück von am Leuchtenteil, insbesondere am Reflektor angeordneten Führungselementen gebildet, die sich mit der Wand im Kontakt befinden. Dadurch kann ebenfalls auf einfache Weise eine exakte Ausrichtung der Beleuchtungseinheit und ihres mindestens einen Leuchtdiodenchips sowie ggf. einer auf dem mindestens einen Leuchtdiodenchip aufgesetzten Primäroptik bezüglich des Leuchtenteils bzw. des Reflektors und insbesondere bezüglich der optischen Achse der Leuchte bzw. der Licht reflektierenden Flächen des Reflektors ermöglicht werden.According to an alternative further exemplary embodiment of the invention, the at least one projection or the at least one recess is formed by a wall of the housing of the lighting unit and the matching counterpart of guide elements arranged on the luminaire part, in particular on the reflector, which are in contact with the wall. As a result, the exact alignment of the illumination unit and its at least one LED chip and possibly a primary optics mounted on the at least one LED chip with respect to the luminous portion or the reflector and in particular with respect to the optical axis of the lamp or the light-reflecting surfaces of the reflector be enabled.

Vorteilhafterweise weisen die Befestigungsmittel der erfindungsgemäßen Beleuchtungseinheit mindestens zwei Vorsprünge bzw. Vertiefungen, die am Gehäuse angeordnet sind und die dazu vorgesehen sind, zur Montage der Beleuchtungseinheit in der Leuchte, mit passgerecht darauf abgestimmten Gegenstücken an einem Leuchtenteil der Leuchte derart zusammen zu wirken, dass die Vorsprünge bzw. die Vertiefungen und die Gegenstücke passgerecht ineinander greifen. Dadurch wird eine eindeutige Einbaulage der Beleuchtungseinheit gewährleistet und insbesondere eine Rotationsbewegung verhindert.Advantageously, the fastening means of the lighting unit according to the invention at least two projections or recesses, which are arranged on the housing and which are provided for mounting the lighting unit in the lamp to interact with matching matched counterparts on a light portion of the lamp such that the Protrusions or the recesses and the counterparts fit into each other. This ensures a clear installation position of the lighting unit and in particular prevents a rotational movement.

III. Beschreibung des bevorzugten Ausführungsbeispiels III. Description of the Preferred Embodiment

Nachstehend wird die Erfindung anhand von bevorzugten Ausführungsbeispielen näher erläutert. Es zeigen:

Figur 1
Eine Draufsicht auf eine Beleuchtungseinheit gemäß dem bevorzugten Ausführungsbeispiel der Erfindung in schematischer Darstellung
Figur 2
Eine Draufsicht auf die verengte Bohrung der in Figur 1 abgebildeten Beleuchtungseinheit
Figur 3
Eine Draufsicht auf die Rückseite eines Fahrzeugscheinwerfers gemäß dem ersten Ausführungsbeispiel der erfindungsgemäßen Leuchte, vor der Montage der in Figur 1 abgebildeten Beleuchtungseinheit
Figur 4
Eine Seitenansicht der Primäroptik bzw. Abdeckung der in Figur 1 abgebildeten Beleuchtungseinheit
Figur 5
Eine Draufsicht auf die in Figur 4 dargestellte Primäroptik bzw. Abdeckung
Figur 6
Eine Darstellung aller Komponenten der Beleuchtungseinheit gemäß dem in den Figuren 1, 2, 4 und 5 abgebildeten ersten Ausführungsbeispiel
Figur 7
Eine Darstellung der in Figur 6 abgebildeten Beleuchtungseinheit im montierten Zustand aller Komponenten
Figur 8
Eine Draufsicht auf die Rückseite eines Fahrzeugscheinwerfers gemäß dem zweiten Ausführungsbeispiel der erfindungsgemäßen Leuchte, vor der Montage der in Figur 7 abgebildeten Beleuchtungseinheit
Figur 9
Eine Draufsicht auf die Rückseite eines Fahrzeugscheinwerfers gemäß dem dritten Ausführungsbeispiel der erfindungsgemäßen Leuchte, vor der Montage der in Figur 7 abgebildeten Beleuchtungseinheit
The invention will be explained in more detail below with reference to preferred exemplary embodiments. Show it:
FIG. 1
A top view of a lighting unit according to the preferred embodiment of the invention in a schematic representation
FIG. 2
A top view of the narrowed hole of the in FIG. 1 pictured lighting unit
FIG. 3
A plan view of the back of a vehicle headlamp according to the first embodiment of the lamp according to the invention, prior to assembly of in FIG. 1 pictured lighting unit
FIG. 4
A side view of the primary optics or cover of in FIG. 1 pictured lighting unit
FIG. 5
A top view of the in FIG. 4 illustrated primary optics or cover
FIG. 6
A representation of all components of the lighting unit according to the in the FIGS. 1 . 2 . 4 and 5 illustrated first embodiment
FIG. 7
A representation of in FIG. 6 illustrated lighting unit in the assembled state of all components
FIG. 8
A plan view of the rear side of a vehicle headlamp according to the second embodiment of the luminaire according to the invention, before mounting the in FIG. 7 pictured lighting unit
FIG. 9
A plan view of the back of a vehicle headlamp according to the third embodiment of the lamp according to the invention, prior to assembly of in FIG. 7 pictured lighting unit

Die Beleuchtungseinheit gemäß den bevorzugten Ausführungsbeispielen der Erfindung umfasst ein topfartiges, im wesentlichen zylindersymmetrisches Gehäuse 100 aus Aluminium mit einem kreisscheibenartigen Boden 101 und einer, am Boden 101 angeformten Seitenwand 102, die entlang der Mantelfläche eines Zylinders verläuft. Das Gehäuse 100 ist insbesondere als Aluminiumdruckgussteil ausgebildet. Der Boden 101 des Gehäuses 100 weist an seiner Innenseite eine einteilig mit dem Boden 101 ausgebildete Erhebung 103 auf, die einen hohen Mittelabschnitt 1030 und zwei tiefer liegende Plateaus 1031, 1032 besitzt. Die Oberseite des Mittelabschnitts 1030 besitzt eine größere Höhe über dem Boden 101 des Gehäuses 100 als die beiden, auf unterschiedlichen Seiten des Mittelabschnitts angeordneten Plateaus 1031, 1032. Die Oberseite des Mittelabschnitts bildet eine Auflagefläche für eine Trägerplatte 2 aus Keramik, die als Träger für fünf Leuchtdiodenchips 3 dient, und für eine Primäroptik 400. Die Trägerplatte 2 gewährleistet eine elektrische Isolierung zwischen dem metallischen Gehäuse 100, insbesondere der Erhebung 103, und den Leuchtdiodenchips 3. Die fünf Leuchtdiodenchips 3 sind auf der Trägerplatte 2 in einer Reihe angeordnet und von den Wänden eines Rahmens umgeben. Die Leuchtdiodenchips 3 emittieren blaues Licht und sind mit einer Leuchtstoffbeschichtung (Chip-Layer-Coating) versehen, um die Wellenlänge eines Teils der von den Leuchtdiodenchips 3 generierten elektromagnetischen Strahlung zu konvertieren, so dass die Beleuchtungseinrichtung während ihres Betriebs weiß erscheinendes Licht emittiert. Bei den Leuchtdiodenchips 3 handelt es sich beispielsweise um Dünnfilm-Leuchtdiodenchips, deren Grundprinzip beispielsweise in der Druckschrift I. Schnitzer et al., Appl. Phys. Lett. 63 (16), 18. Oktober 1993, 2174-2176 beschrieben ist. Die Trägerplatte 2 wird mittels eines Bestückungsautomaten auf der Oberseite des Mittelabschnitts 1030 der Erhebung 103 in einem vorgegebenen Abstand und in wohl definierter Orientierung bezüglich eines auf dem ersten Plateaus 1031 angeordneten, hohlzylindrischen Stegs 105 und eines auf dem zweiten Plateau 1032 angeordneten Langlochs 104 aufgeklebt. Die Trägerplatte 2 mit den darauf angeordneten Leuchtdiodenchips 3 ist zwischen dem Langloch 104 und dem hohlzylindrischen Steg 105 angeordnet. Das Langloch 104 und der hohlzylindrische Steg 105 dienen zur Ausrichtung einer kuppelartigen Primäroptik 400 (Figuren 4 und 5), die über den Leuchtdiodenchips 3 platziert ist, so dass das von den Leuchtdiodenchips 3 bzw. den Leuchtdioden emittierte Licht in die Primäroptik 400 eingekoppelt wird. Bei der Primäroptik 400 handelt es sich im einfachsten Fall um eine lichtdurchlässige, kuppelartige Abdeckung für die Leuchtdiodenchips 3. Die Primäroptik 400 weist zwei Stege 401, 402 auf, die in das Langloch 104 und den hohlzylindrischen Steg 105 passgerecht eingreifen. Die Oberseite bzw. das Ende des hohlzylindrischen Stegs 105 dient der Primäroptik 400 als Auflagefläche. Eine weitere Auflagefläche für die Primäroptik 400 wird von einem Steg 106 mit ovalen Querschnitt gebildet, der auf dem ersten Plateau 1031, neben dem hohlzylindrischen Steg 105 und gegenüber dem Langloch 104 angeordnet ist. Die Oberseite des zylindrischen Hohlstegs 105 und des Stegs 106 mit ovalem Quersteg besitzen dieselbe Höhe über dem Gehäuseboden 101 wie die Oberseite des Mittelabschnitts 1030. Auf dem ersten 1031 und zweiten Plateau 1032 sind ferner zwei einander gegenüberliegende Stifte 107, 108 angeordnet, die in Durchbrüche 403, 404 am Rand der Primäroptik 400 greifen, um diese an dem Gehäuse 100 zu fixieren. Im Bereich des ersten Plateaus 1031 weist die Erhebung 103 zwei auf unterschiedlichen Seiten des Plateaus 1031 angeordnete, ohrenartige Anformungen 109, 110 mit jeweils einem Stift 1090, 1100 auf. Die Stifte 1090, 1100 dienen zur Vernietung einer Montageplatine 500, die auf der Oberseite des ersten 1031 und des zweiten Plateaus 1032 sowie auf drei weiteren, mit jeweils einem Stift 1110, 1120, 1130 versehenen Auflageflächen 111, 112, 113 aufliegt. Die vorgenannten Auflageflächen 111, 112, 113 sind äquidistant entlang der Innenseite eines an der Innenseite der Seitenwand 102 verlaufenden ringförmigen Stegs 114 angeordnet. Die Montageplatine 500 (Figur 6) besitzt zwei im Wesentlichen rechteckige Durchbrüche 501, 502, durch die der Mittelabschnitt 1030 und die Stege 105, 106 sowie die Stifte 107, 108 hindurch ragen. Auf der Montageplatine sind die Komponenten eines Betriebsgerätes für die Leuchtdiodenchips 3 montiert. Insbesondere umfasst das Betriebsgerät eine Treiberschaltung zur Stromversorgung der Leuchtdiodenchips 3 und einen Spannungswandler zur Energieversorgung der Treiberschaltung aus der Bordnetzspannung des Kraftfahrzeugs. Der Rand der nahezu kreisscheibenförmigen Montageplatine 500 schließt mit der Innenseite der ringförmigen Auflagefläche 114 für den Dichtring 600 ab, so dass die Montageplatine 500 und der Gehäuseboden 101 sowie der ringförmige Steg 114 bzw. der darauf liegende Dichtungsring 600 einen Innenraum bilden. Neben der ohrenartigen Anformung 109 und dem hohlzylindrischen Steg 105 ist in der Erhebung 103 ein Trog 115 ausgebildet, der mit einer Wärme leitenden Paste gefüllt ist. Auf dem Trog 115 ist ein temperaturabhängiger Widerstand (nicht abgebildet), insbesondere ein so genannter NTC (Widerstand mit negativer Temperaturcharakteristik), angeordnet, der mit der Wärme leitenden Paste in Kontakt steht und als Temperatursensor dient, um die Betriebstemperatur der Leuchtdiodenchips 3 zu messen. Die Seitenwand 102 weist drei entlang des Umfangs des Gehäuses 100 angeordnete Aussparungen 1021, 1022, 1023 auf, in denen jeweils eine parallel zum Gehäuseboden 101 verlaufende Fläche 120, 130, 140 angeordnet ist. Diese Flächen 120, 130, 140 befinden sich auf gleicher Höhe über dem Gehäuseboden 101 und werden jeweils durch eine in das Innere des Gehäuses 100 gerichtete Einbuchtung 1141, 1142, 1143 des ringförmigen Stegs 114 begrenzt. In der ersten Fläche 120 ist eine durchgängige, in Richtung des Gehäusebodens 101 stufenartig verengte Bohrung 121 angeordnet, die von der Fläche 120 bis zur Außenseite des Gehäusebodens 101 reicht. Die Bohrung 121 ist derart ausgebildet, dass in der Fläche 120 eine kreiszylindrische Vertiefung 122 angeordnet ist, deren Außenradius dem ersten, großen Radius der Bohrung 121 und deren Innenradius dem zweiten, kleinen Radius der Bohrung entspricht. Die Tiefe der Bohrung 121 beträgt im Bereich des ersten, großen Radius nur wenige Millimeter, während der Bereich der Bohrung 121 im Bereich des zweiten, kleinen Radius von dem Boden der Vertiefung 122 bis zur Außenseite des Gehäusebodens 101 reicht. Das heißt, die Höhe des Bodens der Vertiefung 122 über dem Gehäuseboden 101 ist nur um wenige Millimeter geringer als die Höhe der Flächen 120, 130, 140 über dem Gehäuseboden 101. In den anderen beiden Flächen 130, 140 ist ebenfalls jeweils eine durchgängige Bohrung 131, 141 angeordnet, deren Radius jeweils mit dem Radius des engen Bereichs der ersten Bohrung 121 übereinstimmt. In dem Gehäuseboden 101 sind ferner zwei Durchbrüche 150 angeordnet, die zur Durchführung von elektrischen Anschlusskabeln für die Energieversorgung der auf der Montageplatine montierten Komponenten des Betriebsgeräts dienen. Außerdem weist der Gehäuseboden 101 vorzugsweise drei weitere Bohrungen zur Befestigung eines Kühlkörpers (nicht abgebildet) auf.The lighting unit according to the preferred embodiments of the invention comprises a pot-shaped, substantially cylindrically symmetrical housing 100 made of aluminum with a circular disk-like bottom 101 and a, formed on the bottom 101 side wall 102 which extends along the lateral surface of a cylinder. The housing 100 is designed in particular as an aluminum die cast part. The bottom 101 of the housing 100 has on its inside an integrally formed with the bottom 101 elevation 103, which has a high central portion 1030 and two lower lying plateaus 1031, 1032 has. The top of the central portion 1030 has a greater height above the bottom 101 of the housing 100 than the two, on different sides of the central portion arranged plateau 1031, 1032. The top of the central portion forms a support surface for a support plate 2 made of ceramic, which serves as a carrier for five The support plate 2 ensures electrical insulation between the metallic housing 100, in particular the elevation 103, and the light-emitting diode chips 3. The five light-emitting diode chips 3 are arranged on the carrier plate 2 in a row and from the walls surrounded by a frame. The light-emitting diode chips 3 emit blue light and are provided with a phosphor coating (chip layer coating) in order to convert the wavelength of a part of the electromagnetic radiation generated by the light-emitting diode chips 3, so that the illumination device emits white light during its operation. The light-emitting diode chips 3 are, for example, thin-film light-emitting diode chips whose basic principle is described, for example, in US Pat Reference I. Schnitzer et al., Appl. Phys. Lett. 63 (16), 18 October 1993, 2174-2176 is described. The carrier plate 2 is glued by means of a placement machine on the top of the central portion 1030 of the elevation 103 at a predetermined distance and in a well-defined orientation with respect to a arranged on the first plateau 1031, hollow cylindrical web 105 and a disposed on the second plateau 1032 elongated hole 104. The support plate 2 with the light-emitting diode chips 3 arranged thereon is arranged between the oblong hole 104 and the hollow-cylindrical web 105. The slot 104 and the hollow cylindrical web 105 serve to align a dome-like primary optics 400 (FIG. FIGS. 4 and 5 ), which is placed over the light-emitting diode chips 3, so that the light emitted by the light-emitting diode chips 3 or the light-emitting diodes is coupled into the primary optics 400. In the simplest case, the primary optics 400 are a translucent, dome-like cover for the light-emitting diode chips 3. The primary optics 400 has two webs 401, 402 which engage in the slot 104 and the hollow-cylindrical web 105 in an appropriate manner. The top or the end of the hollow cylindrical web 105 serves the primary optics 400 as a support surface. Another support surface for the primary optics 400 is from a Web 106 formed with an oval cross section, which is disposed on the first plateau 1031, adjacent to the hollow cylindrical web 105 and the slot 104. The top of the cylindrical hollow web 105 and the web 106 with oval transverse web have the same height above the housing bottom 101 as the top of the central portion 1030. On the first 1031 and second plateau 1032 two opposing pins 107, 108 are further arranged in the openings 403 , 404 engage the edge of the primary optics 400 to fix them to the housing 100. In the area of the first plateau 1031, the elevation 103 has two ear-like projections 109, 110 arranged on different sides of the plateau 1031, each with a pin 1090, 1100. The pins 1090, 1100 are used for riveting a mounting board 500, which rests on the top of the first 1031 and second plateau 1032 and on three other, each provided with a pin 1110, 1120, 1130 bearing surfaces 111, 112, 113. The abovementioned contact surfaces 111, 112, 113 are arranged equidistantly along the inside of an annular web 114 running on the inside of the side wall 102. The mounting board 500 ( FIG. 6 ) has two substantially rectangular openings 501, 502, through which the central portion 1030 and the webs 105, 106 and the pins 107, 108 protrude. On the mounting board, the components of an operating device for the LED chips 3 are mounted. In particular, the operating device comprises a driver circuit for powering the LED chips 3 and a voltage converter for supplying power to the driver circuit from the vehicle electrical system voltage of the motor vehicle. The edge of the almost circular disk-shaped mounting board 500 terminates with the inside of the annular support surface 114 for the sealing ring 600, so that the mounting board 500 and the housing bottom 101 and the annular ridge 114 and the sealing ring 600 thereon form an interior. In addition to the ear-like Anformung 109 and the hollow cylindrical web 105, a trough 115 is formed in the elevation 103, which is filled with a heat-conductive paste. On the trough 115 is a temperature-dependent resistor (not shown), in particular a so-called NTC (resistance with negative temperature characteristic), arranged, which is in contact with the heat-conductive paste and serves as a temperature sensor to the operating temperature of the LED chips. 3 to eat. The side wall 102 has three recesses 1021, 1022, 1023 arranged along the circumference of the housing 100, in each of which a surface 120, 130, 140 extending parallel to the housing bottom 101 is arranged. These surfaces 120, 130, 140 are located at the same height above the housing bottom 101 and are each bounded by a directed into the interior of the housing 100 recess 1141, 1142, 1143 of the annular ridge 114. In the first surface 120 a continuous, in the direction of the housing bottom 101 step-narrowed bore 121 is arranged, which extends from the surface 120 to the outside of the housing bottom 101. The bore 121 is formed such that in the surface 120 a circular cylindrical recess 122 is arranged, whose outer radius corresponds to the first, large radius of the bore 121 and the inner radius of the second, small radius of the bore. The depth of the bore 121 is only a few millimeters in the region of the first, large radius, while the region of the bore 121 in the region of the second, small radius extends from the bottom of the depression 122 to the outside of the housing bottom 101. That is, the height of the bottom of the recess 122 above the housing bottom 101 is only a few millimeters less than the height of the surfaces 120, 130, 140 above the housing bottom 101. In the other two surfaces 130, 140 is also in each case a through bore 131th , 141, whose radius coincides with the radius of the narrow portion of the first bore 121, respectively. In the housing bottom 101 two apertures 150 are further arranged, which serve for the passage of electrical connection cables for the power supply of mounted on the mounting board components of the operating device. In addition, the housing bottom 101 preferably has three further holes for fastening a heat sink (not shown).

Die Vertiefung 122 ist zur Aufnahme eines passgerecht darauf abgestimmten, an der Rückseite 201 des in Figur 3 abgebildeten Reflektors 200 des Fahrzeugscheinwerfers angeformten Hohlstegs 210 vorgesehen. Der Außendurchmesser dieses Hohlstegs 210 ist auf den ersten, großen Radius der Bohrung 121, das heißt, auf den Radius der Vertiefung 122 abgestimmt. In dem Hohlsteg 210 ist ein Bohrloch 211 angeordnet, dessen Radius mit dem zweiten, kleinen Radius der Bohrung 121 identisch ist und die zum Verschrauben des Gehäuses 100 der Beleuchtungseinheit mit dem Reflektor 200 dient. Das Verschrauben erfolgt von der Außenseite des Gehäusebodens 101 her, wobei die Schraube an der Außenseite bzw. Rückseite des Bodens 101 in den verengten Bereich der Bohrung 121 eingeführt wird und durch den Schraubvorgang schließlich in das koaxial zum engen Bereich der Bohrung 121 angeordnete Bohrloch 211 des Hohlstegs 210 eindringt. Der Hohlsteg 210 greift somit passgerecht in den erweiterten Bereich 122 der Bohrung 121 ein, so dass die Lage des Hohlstegs 210 und der abgestuften Bohrung 121 als Referenz für die Ausrichtung der Beleuchtungseinheit bzw. der Leuchtdiodenchips 3 bezüglich des Reflektors 200 dienen können. Der Reflektor 200 weist an seiner Rückseite 201 einen ringförmigen Flansch 202 auf, dessen Abmessungen auf den ringförmigen Steg 114 der Beleuchtungseinheit abgestimmt sind. Auf dem ringförmigen Steg 114 liegt ein Dichtungsring 600 aus Gummi oder Silikon auf, der nach der Montage der Beleuchtungseinheit an dem ringförmigen Flansch 202 mit Klemmsitz anliegt. Das heißt, nach der Montage der Beleuchtungseinheit im Fahrzeugscheinwerfer ist der Dichtungsring zwischen dem ringförmigen Flansch 202 des Reflektors 200 und dem ringförmigen Steg 114 der Beleuchtungseinheit angeordnet. Auf dem ringförmigen Flansch 202 sind zwei weitere, jeweils mit einem Bohrloch 221, 231 versehene Hohlstege 220, 230 angeordnet, die zur Montage der Beleuchtungseinheit so ausgerichtet werden, dass die Bohrlöcher 221 bzw. 231 koaxial zu den Bohrungen 131 bzw. 141 angeordnet sind, um jeweils eine Schraube von der Außenseite bzw. Rückseite des Gehäusebodens 101 in die Bohrungen 131 bzw. 141 und die Bohrlöcher 221 bzw. 231 einführen zu können. Das heißt, die Köpfe der in den Bohrungen 121, 131, 141 steckenden Schrauben liegen an der Außenseite bzw. Rückseite des Gehäusebodens 101 an und ihre Spitzen erstrecken sich bis in die Bohrlöcher 211, 221, 231 der entsprechenden Hohlstege 210, 220, 230, um mittels dieser Schrauben eine Schraubverbindung zwischen dem Gehäuse 100 der Beleuchtungseinrichtung und dem Reflektor 200 herzustellen. Der erste Hohlsteg 210 ist länger ausgebildet als die anderen beiden Hohlstege 220, 230 und besitzt einen abgestuften Endabschnitt mit reduziertem Außendurchmesser, weil er passgerecht in die Vertiefung 122 in der Fläche 120 eingreift. An dem ringförmigen Flansch 202 ist ein Zapfen 203 angeformt, der in eine Nut 1024 in der Seitenwand 102 des Gehäuses 100 der Beleuchtungseinheit eingreift. Der Zapfen 203 liegt dem ersten Hohlsteg 210 diametral gegenüber. Analog liegt die Nut 1024 der Auflagefläche 120 diametral gegenüber. Die Nut 1024 und der Zapfen 203 verhindern zusammen mit dem ersten Hohlsteg 210 und der stufenartigen Bohrung 121 eine Rotation der Beleuchtungseinheit um ihre Symmetrieachse.The recess 122 is adapted to receive an appropriately matched, at the back 201 of in FIG. 3 pictured reflector 200 of the vehicle headlamp molded hollow web 210 is provided. The outer diameter of this hollow web 210 is matched to the first, large radius of the bore 121, that is, to the radius of the recess 122. In the hollow web 210, a borehole 211 is arranged, whose radius is identical to the second, small radius of the bore 121 and which serves to screw the housing 100 of the lighting unit with the reflector 200. The screwing is carried out from the outside of the housing bottom 101, wherein the screw is introduced at the outside or back of the bottom 101 in the narrowed portion of the bore 121 and by the screwing finally into the coaxial with the narrow portion of the bore 121 arranged well 211 of Hollow web 210 penetrates. The hollow web 210 thus fits snugly into the widened region 122 of the bore 121, so that the position of the hollow web 210 and the stepped bore 121 can serve as a reference for the orientation of the illumination unit or the light-emitting diode chips 3 with respect to the reflector 200. The reflector 200 has on its rear side 201 an annular flange 202 whose dimensions are matched to the annular web 114 of the lighting unit. On the annular ridge 114 is a sealing ring 600 made of rubber or silicone, which rests after mounting the lighting unit to the annular flange 202 with a press fit. That is, after mounting the illumination unit in the vehicle headlamp, the seal ring is disposed between the annular flange 202 of the reflector 200 and the annular bridge 114 of the illumination unit. On the annular flange 202, two further, each with a borehole 221, 231 provided hollow webs 220, 230 are arranged, which are aligned for mounting the lighting unit so that the boreholes 221 and 231 are arranged coaxially to the bores 131 and 141, in order to be able to insert in each case one screw from the outside or rear side of the housing bottom 101 into the bores 131 or 141 and the boreholes 221 and 231, respectively. That is to say, the heads of the screws stuck in the bores 121, 131, 141 bear against the outside or rear side of the housing bottom 101 and their tips extend into the boreholes 211, 221, 231 of the corresponding hollow webs 210, 220, 230, to make a screw connection between the housing 100 of the illumination device and the reflector 200 by means of these screws. The first hollow web 210 is formed longer than the other two hollow webs 220, 230 and has a stepped end portion with reduced outer diameter, because it fits into the recess 122 in the surface 120 passes. On the annular flange 202, a pin 203 is formed, which in a groove 1024 in the side wall 102 of the housing 100 of the illumination unit engages. The pin 203 is diametrically opposite the first hollow web 210. Similarly, the groove 1024 of the support surface 120 is diametrically opposite. The groove 1024 and the pin 203 together with the first hollow web 210 and the stepped bore 121 prevent rotation of the lighting unit about its axis of symmetry.

In der Rückwand 201 des Reflektors 200 ist ein im Wesentlichen rechteckförmiger Durchbruch 204 angeordnet, durch den die Leuchtdiodenchips 3 und die darauf aufgesetzte Primäroptik 400 nach der Montage der Beleuchtungseinheit hindurchragen, so dass das von den Leuchtdiodenchips 3 emittierte Licht, nach dem Passieren der Primäroptik 400 auf die Licht reflektierenden Flächen des Reflektors 200 auftrifft.In the rear wall 201 of the reflector 200, a substantially rectangular opening 204 is arranged through which project the LED chips 3 and the primary optics 400 mounted thereon after the mounting of the illumination unit, so that the light emitted by the LED chips 3, after passing through the primary optics 400 incident on the light reflecting surfaces of the reflector 200.

Der Reflektor 200 mit der daran montierten Beleuchtungseinheit sind Bestandteil eines Fahrzeugscheinwerfers, vorzugsweise eines Nebellichtscheinwerfers oder eines Scheinwerfers für Tagfahrlicht oder auch für Fern- bzw. Abblendlicht.The reflector 200 with the illumination unit mounted thereon are part of a vehicle headlamp, preferably a foglamp or a headlamp for daytime running lights or for high beam or low beam.

In Figur 8 ist ein zweites Ausführungsbeispiel eines Reflektors 200' abgebildet, der anstelle des in Figur 3 abgebildeten Reflektors 200 zusammen mit der in den Figuren 1, 2, 4, 5, 6 und 7 dargestellten Beleuchtungseinheit verwendet werden kann, um einen erfindungsgemäßen Fahrzeugscheinwerfer zu bilden. Der in Figur 8 abgebildete Reflektor 200' unterscheidet sich von dem in Figur 3 dargestellten Reflektor 200 nur dadurch, dass er drei äquidistant entlang des Außenumfangs des ringförmigen Flansches 202 angeordnete Stege 203' aufweist, die sich parallel zur Ringachse des Flansches 202 erstrecken und an der Außenseite der Wand 102 des Gehäuses 100 der Beleuchtungseinheit anliegen. Sie dienen anstelle des Zapfens 203 gemäß dem Reflektor 200 des in Figur 3 abgebildeten ersten Ausführungsbeispiels als weitere Führungselemente zur exakten Ausrichtung von Reflektor 200' und Beleuchtungseinheit.In FIG. 8 a second embodiment of a reflector 200 'is shown, which instead of the in FIG. 3 pictured reflector 200 together with in the FIGS. 1 . 2 . 4, 5 . 6 and 7 illustrated lighting unit can be used to form a vehicle headlight according to the invention. The in FIG. 8 Reflector 200 'shown differs from that in FIG FIG. 3 illustrated reflector 200 only in that it has three equidistant along the outer circumference of the annular flange 202 arranged webs 203 ', which extend parallel to the ring axis of the flange 202 and abut the outside of the wall 102 of the housing 100 of the lighting unit. They serve instead of the pin 203 according to the reflector 200 of the in FIG. 3 pictured first embodiment as further guide elements for the exact alignment of reflector 200 'and lighting unit.

In Figur 9 ist ein drittes Ausführungsbeispiel eines Reflektors 200" abgebildet, der anstelle des in Figur 3 abgebildeten Reflektors 200 oder anstelle des in Figur 8 abgebildeten Reflektors 200' zusammen mit der in den Figuren 1, 2, 4, 5, 6 und 7 dargestellten Beleuchtungseinheit verwendet werden kann, um einen erfindungsgemäßen Fahrzeugscheinwerfer zu bilden. Der in Figur 9 abgebildete Reflektor 200" unterscheidet sich von dem in Figur 8 dargestellten Reflektor 200' nur dadurch, dass er drei gleichartige Hohlstege 210", 220, 230 für die Schraubverbindung von Beleuchtungseinheit und Reflektor besitzt und auf den verlängerten Hohlsteg 210 mit dem Endabschnitt mit reduziertem Außendurchmesser verzichtet wurde. Die Ausrichtung von Beleuchtungseinheit und Reflektor 200" wird hier nur durch das passgerechte Ineinandergreifen der drei Stege 210", 220, 230 und der Wand 102 des Gehäuses 100 der Beleuchtungseinheit und mit Hilfe des Zapfens 203, der wie beim in Figur 3 abgebildetn Ausführungsbeispiel zum Eingreifen in die Nut 1024 der Wand 102 des Gehäuses 100 der Beleuchtungseinheit dient, gewährleistet. Mittels Schrauben, die in die Bohrungen 121, 131, 141 und in die Hohlstege 210", 220, 230 eingeführt werden, wird eine Verbindung zwischen der Beleuchtungseinheit und dem Reflektor 200" hergestellt.In FIG. 9 FIG. 3 shows a third exemplary embodiment of a reflector 200 "which, instead of the one shown in FIG FIG. 3 pictured reflector 200 or instead of in FIG. 8 pictured reflector 200 'together with in the FIGS. 1 . 2 . 4, 5 . 6 and 7 illustrated lighting unit can be used to a inventive To make vehicle headlights. The in FIG. 9 pictured reflector 200 "differs from that in FIG. 8 illustrated reflector 200 'only in that it has three similar hollow webs 210 ", 220, 230 for the screw connection of lighting unit and reflector and has been dispensed with the extended hollow web 210 with the end portion with reduced outer diameter.The orientation of illumination unit and reflector 200" is here only by the proper fit of the three webs 210 ", 220, 230 and the wall 102 of the housing 100 of the lighting unit and with the help of the pin 203, as in the FIG. 3 figured embodiment serves to engage in the groove 1024 of the wall 102 of the housing 100 of the lighting unit, guaranteed. By means of screws which are inserted into the bores 121, 131, 141 and into the hollow webs 210 ", 220, 230, a connection is made between the lighting unit and the reflector 200".

Die Erfindung beschränkt sich nicht auf dies oben näher erläuterten Ausführungsbeispiele. Beispielsweise kann an der Außenseite bzw. Rückseite des Gehäusebodens 101 eine Kühlvorrichtung, die beispielsweise aus Kühlrippen besteht oder als Wärmesenke ausgebildet ist, angebracht sein.The invention is not limited to this embodiment explained in more detail above. For example, on the outside or rear side of the housing bottom 101, a cooling device, which consists for example of cooling fins or is designed as a heat sink, be mounted.

Claims (7)

  1. Luminaire having an illumination unit, the illumination unit comprising at least one light emitting diode chip (3) and a housing (100) that at least partially surrounds the at least one light emitting diode chip (3) and is provided with fastening means for mounting the illumination unit on a luminaire part (200), in which the fastening means comprise at least one projection or one depression (122; 102) that is arranged on the housing (100) and cooperates with a counterpart (210; 203'), coordinated in an accurately fitting fashion therewith, on the luminaire part (200; 200'; 200") of the luminaire in such a way that the at least one projection or the at least one depression (122; 102) and the counterpart (210; 203') interlock in an accurately fitting fashion, and in which the at least one projection or the at least one depression (122) have a first bore (121), and the accurately fitting counterpart (210) has a second bore (211) that are coaxially aligned for mounting the illumination unit on the luminaire part (200; 200'), characterized in that the first (121) and second bore (211) are formed as a component of a screw connection between the illumination unit and the luminaire part (200; 200').
  2. Luminaire according to Claim 1, in which the portion (122), forming the edge of the first bore (121), of the housing (100) and the portion (210), forming the edge of the second bore (211), of the luminaire part (200; 200') interlock in an accurately fitting fashion.
  3. Luminaire according to Claim 1, in which the first bore (121) or/and the second bore (211) is/are constricted in a stepped fashion.
  4. Luminaire according to one or more of Claims 1 to 3, in which the second bore (211) is arranged on the rear side (201), averted from the light exit opening, of the luminaire part (200; 200').
  5. Luminaire according to Claim 1, in which the at least one projection or the at least one depression is formed by a wall (102) of the housing (100), and the accurately fitting counterpart is formed by guide elements (203'), arranged on the luminaire part (200"), that are in contact with the wall (102).
  6. Luminaire according to one or more of Claims 1 to 5, in which the fastening means comprise two projections or depressions (122; 102, 1024) that are arranged on the housing (100) and cooperate with counterparts (210; 203'; 203), coordinated in an accurately fitting fashion therewith, on the luminaire part (200; 200'; 200") of the luminaire in such a way that the projections or depressions (122; 102; 1024) and the counterparts (210; 203'; 203) interlock in an accurately fitting fashion.
  7. Luminaire according to one or more of Claims 1 to 6 formed as a vehicle headlight.
EP07822788.1A 2006-11-28 2007-11-21 Illumination unit for vehicle headlights, and vehicle headlight Active EP2095016B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202006018081U DE202006018081U1 (en) 2006-11-28 2006-11-28 Lighting unit for e.g. vehicle headlight, has fastening unit with projection and/or recess that works together with counterpiece at illuminating part of lighting fixture, such that projection and/or recess and counterpiece are interlocked
PCT/EP2007/062650 WO2008065030A1 (en) 2006-11-28 2007-11-21 Illumination unit for vehicle headlights, and vehicle headlight

Publications (2)

Publication Number Publication Date
EP2095016A1 EP2095016A1 (en) 2009-09-02
EP2095016B1 true EP2095016B1 (en) 2017-03-08

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EP07822788.1A Active EP2095016B1 (en) 2006-11-28 2007-11-21 Illumination unit for vehicle headlights, and vehicle headlight

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US (1) US8303148B2 (en)
EP (1) EP2095016B1 (en)
CN (1) CN101553688B (en)
DE (1) DE202006018081U1 (en)
WO (1) WO2008065030A1 (en)

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US20100067248A1 (en) 2010-03-18
CN101553688B (en) 2012-03-14
EP2095016A1 (en) 2009-09-02
DE202006018081U1 (en) 2007-02-08
US8303148B2 (en) 2012-11-06
CN101553688A (en) 2009-10-07
WO2008065030A1 (en) 2008-06-05

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