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WO2014036579A1 - Lighting device - Google Patents

Lighting device Download PDF

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Publication number
WO2014036579A1
WO2014036579A1 PCT/AT2013/000144 AT2013000144W WO2014036579A1 WO 2014036579 A1 WO2014036579 A1 WO 2014036579A1 AT 2013000144 W AT2013000144 W AT 2013000144W WO 2014036579 A1 WO2014036579 A1 WO 2014036579A1
Authority
WO
WIPO (PCT)
Prior art keywords
plate
heat sink
lighting device
shaped carrier
power supply
Prior art date
Application number
PCT/AT2013/000144
Other languages
German (de)
French (fr)
Inventor
Peter STROJ
Original Assignee
Esto Lighting Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Esto Lighting Gmbh filed Critical Esto Lighting Gmbh
Publication of WO2014036579A1 publication Critical patent/WO2014036579A1/en

Links

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
    • 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
    • F21V19/0055—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources by screwing
    • 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
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
    • F21V17/12—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by screwing
    • 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
    • F21V19/0015—Fastening arrangements intended to retain light sources
    • F21V19/0025—Fastening arrangements intended to retain light sources the fastening means engaging the conductors of the light source, i.e. providing simultaneous fastening of the light sources and their electric connections
    • 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
    • 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 lighting device comprising a plate-shaped support on which at least one light emitting diode is arranged and which has electrical contacts for the power supply of the at least one light emitting diode, a releasably secured to the plate-shaped carrier heat sink, wherein the heat sink with the plate-shaped carrier in having surface-contact surface, and connecting means for releasably securing the plate-shaped support to the heat sink.
  • Such a lighting device is e.g. known from DE 202011004439 Ul.
  • modern lighting devices and lamps are increasingly taking advantage of the favorable radiation characteristics and relatively low electrical power consumption of light emitting diodes.
  • no individual light-emitting diodes are sufficient, since they normally can only provide the desired illumination intensity in grouped form.
  • two, three, four or more LEDs can be combined on a common carrier plate or board and installed in a lamp housing, so that the light-emitting front surfaces of the LEDs are arranged parallel to each other and simultaneously form a common radiating surface of the radiator.
  • the carrier plates or boards are suitable, which can be designed either as a heat sink or brought into conductive connection with such a heat sink.
  • accessibility and replaceability of the luminous elements must be ensured, which generally requires a separate structure of the circuit board and the heat sink.
  • connection of the current-carrying cable is a problem.
  • the connection of the current-carrying cable usually takes place by soldering it directly to the upper side or the underside of the plate-shaped carrier or the circuit board. Thereafter, the board is fastened to a cooling body by means of a screw connection.
  • the entire unit would have to be removed from board, heat sink including the installation cable and replaced if necessary. This exchange is very complex and can be made very difficult by the user himself. Therefore, there is a need for replaceable circuit boards.
  • the invention therefore aims to facilitate the replacement of the lighting elements and in particular to make it feasible for users without specialist knowledge in a simple manner.
  • the invention aims to provide a construction with which only the plate-shaped support or the circuit board can be replaced without the heat sink also having to be removed or exchanged at the same time.
  • the invention essentially provides that the connection means consist of an electrically conductive material and, in the state of the plate-shaped support fastened to the heat sink, to the electrical contacts. cooperate to connect the at least one light emitting diode to the power supply.
  • the connecting means are thus designed to simultaneously produce the mechanical connection of the plate-shaped carrier with the heat sink and the electrical connection of the plate-shaped carrier to the power supply.
  • the difference to the conventional technique is therefore that the current-carrying cable does not have to be soldered to the plate-shaped carrier. Rather, a simple replacement of the plate-shaped support by the user is ensured by fixing the plate-shaped support means of releasable connection means.
  • the plate-shaped carrier is designed as a board, wherein the electrical contacts are formed as formed on the board contact surfaces.
  • the printed circuit board can carry further electronic components, in particular those for the control electronics.
  • the contact surface may in particular be formed as part of a conductor track on the circuit board.
  • the electrical conductors of the power supply such as the current-carrying cable on the heat sink, on at least one received in an electrically insulated Aufability of the heat sink contact element or on electrically isolated parts of the Heatsink connected, and preferably at the back of the heat sink, ie on the side facing away from the plate-shaped carrier of the heat sink.
  • the electrical connection of the board with the Power supply is then preferably carried out so that the connecting means in the state fixed to the heat sink of the plate-shaped carrier produce an electrical connection between the arranged on the plate-shaped carrier electrical contacts and on the side facing away from the plate-shaped support side of the heat sink electrical conductors of the power supply. It is not essential that the connecting means enforce the heat sink to reach the rear side. Rather, it is sufficient that the connecting means in the position in which they connect the plate-shaped carrier with the heat sink mechanically and in planar contact with each other, contact a component which is electrically connected to the electrical conductors of the power supply, in particular at the back of the heat sink.
  • the connecting means comprise at least two screws which pass through recesses of the plate-shaped carrier and, in the screwed-in state, respectively contact a component which is electrically connected to the electrical conductor of the power supply.
  • the component electrically connected to the electrical conductor of the power supply is received in an axial opening of the heat sink.
  • an external thread of the screws cooperates with an internal thread of a rotatably received in the heat sink component.
  • Characterized an electrical contact is automatically when screwing the screw into the internal thread of the captured in the heat sink component prepared so ⁇ that can be dispensed separate and serving the electrical contact members.
  • the rotationally fixed received in the heat sink member is formed by a socket of electrically conductive metal, which is electrically connected to the electrical conductor for the power supply of the light emitting diode.
  • the socket is preferably accommodated in the heat sink with the interposition of a surrounding insulating sleeve.
  • the socket is received in the heat sink in such a way that it is set back relative to the surface of the heat sink which can be brought into surface contact with the plate-shaped carrier.
  • the recesses are preferably formed on the circumference of the plate-shaped carrier so that the area of the plate-shaped carrier remaining for heat removal from the heat sink can be maximized.
  • FIG. 1 shows a cross section of the illumination device according to the invention
  • FIG. 2 shows a plan view of the circuit board shown in FIG.
  • a heat sink 1 in which two insulating sleeves 2 are secured against rotation, in particular screwed ⁇ , glued or pressed. Furthermore, two metal bushes 4 are shown, to each of which a current-carrying cable 3 is connected, in particular by soldering or crimping. The connection of the current-carrying cable 3 takes place here on the side facing away from the board 8.
  • the live cables 3 are connected to a power source, not shown, and provide the power supply of the LED available.
  • the metal bushes 4, together with the current-carrying cables 3 are positioned against rotation in the insulating sleeves 2, in particular screwed in, glued or pressed.
  • a circuit board 8 is arranged, which carries at least one light-emitting diode, not shown.
  • the heat sink 1 has a surface which can be brought into surface contact with the circuit board 8.
  • the attachment of the board 8 on the heat sink 1 by means of two screws 6, which pass through a respective recess 11 of the board 8 and are screwed with its external thread in a formed in the socket 4 internal thread.
  • insulating sleeves 5 are attached to the screws 6 and an insulating layer 7 on the board 8.
  • the board 8 has electrical contact surfaces 9, which surround the recesses 11 and which can be contacted by the screw head of the screws 6 either directly or with the interposition of a metal plate 10 each.
  • the production of the electrical contact from the power source to the board 8 thus takes place via the current-carrying cable 3, the metal bushes 4, the screws 6 and the metal discs 10 to the contact surfaces 9 of the board 8.
  • the applied to the board 8 LED is by means of screws 6 am Heatsink 1 attached. At the same time, the screws 6 also make the electrical connection to the power source. In the If necessary, the user simply changes the defective LED board 8 as follows:

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

In a lighting device comprising a plate-shaped support (8), on which at least one LED is arranged and which has electrical contacts for the power supply to the at least one LED, a heat sink (1) separably fastened to the plate-shaped support (8), wherein the heat sink (1) has a surface which can be brought into two-dimensional contact with the plate-shaped support (8), and connectors (6) for the separable connection of the plate-shaped support (8) to the heat sink (1), the connectors (6) are made of an electrically conductive material and interact with the electrical contacts (9) when the plate-shaped support (8) is mounted on the heat sink (1) in order to connect the at least one LED to the power supply.

Description

Be1euchtungsVorrichtung  Be1euchtungsVorrichtung
Die Erfindung betrifft eine Beleuchtungsvorrichtung umfassend einen plattenförmigen Träger, auf dem wenigstens eine Leuchtdi- ode angeordnet ist und welcher elektrische Kontakte für die Stromversorgung der wenigstens einen Leuchtdiode aufweist, einen lösbar mit dem plattenförmigen Träger befestigten Kühlkörper, wobei der Kühlkörper eine mit dem plattenförmigen Träger in flächigen Kontakt bringbare Oberfläche aufweist, und Verbin- dungsmittel zum lösbaren Befestigen des plattenförmigen Trägers am Kühlkörper. The invention relates to a lighting device comprising a plate-shaped support on which at least one light emitting diode is arranged and which has electrical contacts for the power supply of the at least one light emitting diode, a releasably secured to the plate-shaped carrier heat sink, wherein the heat sink with the plate-shaped carrier in having surface-contact surface, and connecting means for releasably securing the plate-shaped support to the heat sink.
Eine derartige Beleuchtungsvorrichtung ist z.B. aus der DE 202011004439 Ul bekannt. Wie dort ausgeführt ist, nutzen moder- ne Beleuchtungsvorrichtungen und Lampen zunehmend die günstigen Abstrahleigenschaften und den relativ geringen elektrischen Energieverbrauch von Leuchtdioden. Um die bestehenden Anforderungen hinsichtlich des Leuchtendesigns und der erreichbaren Lichtstärke zu erfüllen, genügen jedoch in aller Regel keine einzelnen Leuchtdioden, da diese normalerweise erst in gruppierter Form die gewünschte Beleuchtungsintensität liefern können. So können bspw. zwei, drei, vier oder mehr Leuchtdioden auf einer gemeinsamen Trägerplatte oder Platine zusammengefasst und in ein Leuchtengehäuse eingebaut sein, so dass die Licht emittierenden Frontflächen der Leuchtdioden parallel zueinander angeordnet sind und gleichzeitig eine gemeinsame Abstrahlfläche des Strahlers bilden. Such a lighting device is e.g. known from DE 202011004439 Ul. As stated there, modern lighting devices and lamps are increasingly taking advantage of the favorable radiation characteristics and relatively low electrical power consumption of light emitting diodes. In order to meet the existing requirements with regard to the luminaire design and the achievable light intensity, however, as a rule no individual light-emitting diodes are sufficient, since they normally can only provide the desired illumination intensity in grouped form. Thus, for example, two, three, four or more LEDs can be combined on a common carrier plate or board and installed in a lamp housing, so that the light-emitting front surfaces of the LEDs are arranged parallel to each other and simultaneously form a common radiating surface of the radiator.
Da moderne und lichtstarke Leuchtdioden zudem nicht mehr als Kaltlichtquellen anzusehen sind, sondern eine erhebliche Verlustleistung in Form von abgestrahlter Verlustwärme produzieren, muss für eine ausreichende Wärmeabfuhr gesorgt werden, da andernfalls die Lebensdauer der Leuchtdioden leidet. Um diese Verlustwärme effektiv abzuführen, eignen sich die Trägerplatten oder -platinen, die wahlweise als Kühlkörper ausgestaltet oder mit einem solchen Kühlkörper in leitende Verbindung gebracht werden können. Allerdings muss für eine Zugänglichkeit und Aus- wechselbarkeit der Leuchtelemente gesorgt werden, was in der Regel einen separaten Aufbau der Platine und des Kühlkörpers bedingt . Moreover, since modern and high-intensity light-emitting diodes are no longer to be regarded as cold-light sources, but produce a considerable power loss in the form of radiated heat loss, sufficient heat dissipation must be ensured since otherwise the life of the light-emitting diodes suffers. Around To dissipate heat loss effectively, the carrier plates or boards are suitable, which can be designed either as a heat sink or brought into conductive connection with such a heat sink. However, accessibility and replaceability of the luminous elements must be ensured, which generally requires a separate structure of the circuit board and the heat sink.
Hinsichtlich der Austauschbarkeit der Leuchtelemente stellt insbesondere der Anschluss der stromführenden Kabel ein Problem dar. Der Anschluss der stromführenden Kabel erfolgt in der Regel durch Anlöten derselben direkt an der Oberseite oder der Unterseite des plattenförmigen Trägers bzw. der Platine. Danach wird die Platine mittels einer Schraubverbindung an einem Kühl- körper befestigt. Bei einem Defekt der Platine müsste die gesamte Einheit aus Platine, Kühlkörper einschließlich der Installationskabel ausgebaut und ggf. ausgetauscht werden. Dieser Austausch ist sehr aufwändig und kann vom Nutzer selbst sehr schwer vorgenommen werden. Daher besteht ein Bedürfnis nach austauschbaren Platinen. With regard to the interchangeability of the light-emitting elements, in particular the connection of the current-carrying cable is a problem. The connection of the current-carrying cable usually takes place by soldering it directly to the upper side or the underside of the plate-shaped carrier or the circuit board. Thereafter, the board is fastened to a cooling body by means of a screw connection. In case of a defect of the board, the entire unit would have to be removed from board, heat sink including the installation cable and replaced if necessary. This exchange is very complex and can be made very difficult by the user himself. Therefore, there is a need for replaceable circuit boards.
Die Erfindung zielt daher darauf ab, den Austausch der Leuchtelemente zu erleichtern und insbesondere auch für Nutzer ohne Fachkenntnisse in einfacher Weise durchführbar zu machen. Ins- besondere zielt die Erfindung darauf ab, eine Konstruktion zu schaffen, mit welcher nur der plattenförmige Träger bzw. die Platine gewechselt werden kann ohne dass gleichzeitig auch der Kühlkörper ausgebaut oder getauscht werden muss. Zur Lösung dieser Aufgabe sieht die Erfindung im Wesentlichen vor, dass die Verbindungsmittel aus einem elektrisch leitfähigen Material bestehen und im am Kühlkörper befestigten Zustand des plattenförmigen Trägers mit den elektrischen Kontakten zu- sammenwirken, um die wenigstens eine Leuchtdiode mit der Stromversorgung zu verbinden. Die Verbindungsmittel sind somit ausgebildet um gleichzeitig die mechanische Verbindung des plat- tenförmigen Trägers mit dem Kühlkörper und die elektrische Ver- bindung des plattenförmigen Trägers mit der Stromversorgung herzustellen. Der Unterschied zur herkömmlichen Technik liegt also darin, dass die stromführenden Kabel nicht auf dem plattenförmigen Träger angelötet werden müssen. Vielmehr ist durch Befestigung des plattenförmigen Trägers mittels lösbarer Ver- bindungsmittel ein einfacher Austausch des plattenförmigen Trägers durch den Nutzer gewährleistet. The invention therefore aims to facilitate the replacement of the lighting elements and in particular to make it feasible for users without specialist knowledge in a simple manner. In particular, the invention aims to provide a construction with which only the plate-shaped support or the circuit board can be replaced without the heat sink also having to be removed or exchanged at the same time. In order to achieve this object, the invention essentially provides that the connection means consist of an electrically conductive material and, in the state of the plate-shaped support fastened to the heat sink, to the electrical contacts. cooperate to connect the at least one light emitting diode to the power supply. The connecting means are thus designed to simultaneously produce the mechanical connection of the plate-shaped carrier with the heat sink and the electrical connection of the plate-shaped carrier to the power supply. The difference to the conventional technique is therefore that the current-carrying cable does not have to be soldered to the plate-shaped carrier. Rather, a simple replacement of the plate-shaped support by the user is ensured by fixing the plate-shaped support means of releasable connection means.
Bevorzugt ist der plattenförmige Träger als Platine ausgebildet, wobei die elektrischen Kontakte als auf der Platine ausge- bildete Kontaktflächen ausgebildet sind. Die Platine kann außer der wenigstens einen Leuchtdiode weitere elektronische Bauteile, insbesondere solche für die Steuerelektronik tragen. Die Kontaktfläche kann insbesondere als Teil einer Leiterbahn auf der Platine ausgebildet sein. Preferably, the plate-shaped carrier is designed as a board, wherein the electrical contacts are formed as formed on the board contact surfaces. In addition to the at least one light-emitting diode, the printed circuit board can carry further electronic components, in particular those for the control electronics. The contact surface may in particular be formed as part of a conductor track on the circuit board.
Um eine einfache Austauschbarkeit des plattenförmigen Trägers bzw. der Platine zur ermöglichen, sind die elektrischen Leiter der Stromversorgung, wie z.B. die stromführenden Kabel am Kühlkörper, an wenigstens einem in einer elektrisch isolierten Auf- nähme des Kühlkörpers aufgenommenen Kontaktelement oder an elektrisch voneinander isolierten Teilen des Kühlkörpers angeschlossen, und zwar bevorzugt an der Rückseite des Kühlkörpers, d.h. an der dem plattenförmigen Träger abgewandten Seite des Kühlkörpers. Bei einer derartigen Ausbildung kann, bei einem Austausch des plattenförmigen Trägers samt Leuchtdiode, der Kühlkörper in seinem verbauten Zustand verbleiben und die elektrischen Anschlusskabel der Stromversorgung bleiben ebenfalls unberührt. Die elektrische Verbindung der Platine mit der Stromversorgung erfolgt dann bevorzugt so, dass die Verbindungsmittel im am Kühlkörper befestigten Zustand des platten- förmigen Trägers eine elektrische Verbindung zwischen den am plattenförmigen Träger angeordneten elektrischen Kontakten und an der dem plattenförmigen Träger abgewandten Seite des Kühlkörpers angeschlossenen elektrischen Leitern der Stromversorgung herstellen. Dabei ist es nicht unbedingt erforderlich, dass die Verbindungsmittel den Kühlkörper durchsetzen, um dessen Rückseite zu erreichen. Vielmehr reicht es aus, dass die Verbindungsmittel in der Position, in der sie den plattenförmigen Träger mit dem Kühlkörper mechanisch und in flächigem Kontakt miteinander verbinden, einen Bauteil kontaktieren, der mit den elektrischen Leitern der Stromversorgung insbesondere an der Rückseite des Kühlkörpers elektrisch verbunden ist. In order to enable a simple interchangeability of the plate-shaped carrier or the board, the electrical conductors of the power supply, such as the current-carrying cable on the heat sink, on at least one received in an electrically insulated Aufaufnahme of the heat sink contact element or on electrically isolated parts of the Heatsink connected, and preferably at the back of the heat sink, ie on the side facing away from the plate-shaped carrier of the heat sink. With such a design can, in an exchange of the plate-shaped support together with light emitting diode, the heat sink remain in its installed state and the electrical connection cables of the power supply also remain untouched. The electrical connection of the board with the Power supply is then preferably carried out so that the connecting means in the state fixed to the heat sink of the plate-shaped carrier produce an electrical connection between the arranged on the plate-shaped carrier electrical contacts and on the side facing away from the plate-shaped support side of the heat sink electrical conductors of the power supply. It is not essential that the connecting means enforce the heat sink to reach the rear side. Rather, it is sufficient that the connecting means in the position in which they connect the plate-shaped carrier with the heat sink mechanically and in planar contact with each other, contact a component which is electrically connected to the electrical conductors of the power supply, in particular at the back of the heat sink.
Bevorzugt umfassen die Verbindungsmittel wenigstens zwei Schrauben, die Ausnehmungen des plattenförmigen Trägers durchsetzen und im eingeschraubten Zustand jeweils einen mit dem elektrischen Leiter der Stromversorgung elektrisch verbundenen Bauteil kontaktieren. Preferably, the connecting means comprise at least two screws which pass through recesses of the plate-shaped carrier and, in the screwed-in state, respectively contact a component which is electrically connected to the electrical conductor of the power supply.
Bevorzugt ist vorgesehen, dass der mit dem elektrischen Leiter der Stromversorgung elektrisch verbundene Bauteil in einer axialen Durchbrechung des Kühlkörpers aufgenommen ist. It is preferably provided that the component electrically connected to the electrical conductor of the power supply is received in an axial opening of the heat sink.
In konstruktiv besonders einfacher Weise kann bevorzugt vorgesehen sein, dass ein Außengewinde der Schrauben jeweils mit einem Innengewinde eines drehfest in dem Kühlkörper aufgenommenen Bauteils zusammenwirkt. Dadurch wird beim Einschrauben der Schrauben in das Innengewinde des im Kühlkörper aufgenommenen Bauteils automatisch ein elektrischer Kontakt hergestellt, so¬ dass auf gesonderte, dem elektrischen Kontakt dienende Bauteile verzichtet werden kann. Insbesondere ist der drehfest in dem Kühlkörper aufgenommene Bauteil von einer Buchse aus elektrisch leitendem Metall gebildet, der mit dem elektrischen Leiter für die Stromversorgung der Leuchtdiode elektrisch verbunden ist. Die Buchse ist hierbei bevorzugt unter Zwischenschaltung einer sie umgebenden Isolierhülse in dem Kühlkörper aufgenommen. In a structurally particularly simple manner may preferably be provided that an external thread of the screws cooperates with an internal thread of a rotatably received in the heat sink component. Characterized an electrical contact is automatically when screwing the screw into the internal thread of the captured in the heat sink component prepared so ¬ that can be dispensed separate and serving the electrical contact members. In particular, the rotationally fixed received in the heat sink member is formed by a socket of electrically conductive metal, which is electrically connected to the electrical conductor for the power supply of the light emitting diode. In this case, the socket is preferably accommodated in the heat sink with the interposition of a surrounding insulating sleeve.
Um einen unbeabsichtigten direkten elektrischen Kontakt zwi- sehen der Buchse und dem plattenförmigen Träger zu verhindern, ist bevorzugt vorgesehen, dass die Buchse so in dem Kühlkörper aufgenommen ist, dass sie gegenüber der mit dem plattenförmigen Träger in flächigen Kontakt bringbaren Oberfläche des Kühlkörpers zurückversetzt ist. In order to prevent inadvertent direct electrical contact between the sleeve and the plate-shaped carrier, it is preferably provided that the socket is received in the heat sink in such a way that it is set back relative to the surface of the heat sink which can be brought into surface contact with the plate-shaped carrier.
Die Äusnehmungen sind bevorzugt am Umfang des plattenförmigen Trägers ausgebildet, damit der für die Wärmeabfuhr an den Kühlkörper verbleibende Bereich des plattenförmigen Trägers maxi- miert werden kann. The recesses are preferably formed on the circumference of the plate-shaped carrier so that the area of the plate-shaped carrier remaining for heat removal from the heat sink can be maximized.
Die Erfindung wird nachfolgend anhand eines in der Zeichnung schematisch dargestellten Ausführungsbeispiels näher erläutert. In dieser zeigen Fig. 1 einen Querschnitt der erfindungsgemäßen Beleuchtungsvorrichtung und Fig. 2 eine Draufsicht auf die in Fig. 1 gezeigte Platine. The invention will be explained in more detail with reference to an embodiment schematically illustrated in the drawing. 1 shows a cross section of the illumination device according to the invention, and FIG. 2 shows a plan view of the circuit board shown in FIG.
Fig. 1 ist ein Kühlkörper 1 dargestellt, in dem zwei Isolierhülsen 2 verdrehgesichert befestigt sind, insbesondere einge¬ schraubt, eingeklebt oder eingepresst. Weiters sind zwei Me- tallbuchsen 4 dargestellt, an welche jeweils ein stromführendes Kabel 3 angeschlossen ist, insbesondere durch Löten oder Crimp- en. Der Anschluss der stromführenden Kabel 3 erfolgt hierbei an der der Platine 8 abgewandten Seite. Die stromführenden Kabel 3 sind mit einer nicht dargestellten Stromquelle verbindbar und stellen die Stromversorgung der Leuchtdiode zur Verfügung. Die Metallbuchsen 4 werden samt den stromführenden Kabeln 3 in den Isolierhülsen 2 verdrehgesichert positioniert, insbesondere eingeschraubt, eingeklebt oder eingepresst. 1, a heat sink 1 is shown in which two insulating sleeves 2 are secured against rotation, in particular screwed ¬ , glued or pressed. Furthermore, two metal bushes 4 are shown, to each of which a current-carrying cable 3 is connected, in particular by soldering or crimping. The connection of the current-carrying cable 3 takes place here on the side facing away from the board 8. The live cables 3 are connected to a power source, not shown, and provide the power supply of the LED available. The metal bushes 4, together with the current-carrying cables 3 are positioned against rotation in the insulating sleeves 2, in particular screwed in, glued or pressed.
An der Oberseite des Kühlkörpers 1 ist eine Platine 8 angeordnet, die wenigstens eine nicht dargestellte Leuchtdiode trägt. Um einen intensiven Wärmeaustausch zwischen dem Kühlkörper 1 und der Platine 8 zu ermöglichen weist der Kühlkörper 1 eine mit der Platine 8 in flächigen Kontakt bringbare Oberfläche auf. Die Befestigung der Platine 8 auf dem Kühlkörper 1 erfolgt mittels zweier Schrauben 6, die jeweils eine Ausnehmung 11 der Platine 8 durchsetzen und mit ihrem Außengewinde in ein in der Buchse 4 ausgebildetes Innengewinde einschraubbar sind. Um einen Kurzschluss zu vermeiden werden Isolierhülsen 5 an den Schrauben 6 und eine Isolierschicht 7 an der Platine 8 angebracht . Die Platine 8 weist elektrische Kontaktflächen 9 auf, welche die Ausnehmungen 11 umgeben und die von dem Schraubenkopf der Schrauben 6 entweder direkt oder unter Zwischenschaltung einer Metallscheibe 10 jeweils kontaktiert werden können. Die Herstellung des elektrischen Kontaktes von der Stromquelle zur Platine 8 erfolgt somit über die stromführenden Kabel 3, die Metallbuchsen 4, die Schrauben 6 und die Metallscheiben 10 zu den Kontaktflächen 9 der Platine 8. Die auf der Platine 8 aufgebrachte LED wird mittels Schrauben 6 am Kühlkörper 1 befestigt. Gleichzeitig stellen die Schrauben 6 auch die elektrische Verbindung zur Stromquelle her. Im Be- darfsfall wechselt der Nutzer die defekte LED-Platine 8 einfach wie folgt aus: At the top of the heat sink 1, a circuit board 8 is arranged, which carries at least one light-emitting diode, not shown. In order to enable an intensive heat exchange between the heat sink 1 and the circuit board 8, the heat sink 1 has a surface which can be brought into surface contact with the circuit board 8. The attachment of the board 8 on the heat sink 1 by means of two screws 6, which pass through a respective recess 11 of the board 8 and are screwed with its external thread in a formed in the socket 4 internal thread. In order to avoid a short circuit insulating sleeves 5 are attached to the screws 6 and an insulating layer 7 on the board 8. The board 8 has electrical contact surfaces 9, which surround the recesses 11 and which can be contacted by the screw head of the screws 6 either directly or with the interposition of a metal plate 10 each. The production of the electrical contact from the power source to the board 8 thus takes place via the current-carrying cable 3, the metal bushes 4, the screws 6 and the metal discs 10 to the contact surfaces 9 of the board 8. The applied to the board 8 LED is by means of screws 6 am Heatsink 1 attached. At the same time, the screws 6 also make the electrical connection to the power source. In the If necessary, the user simply changes the defective LED board 8 as follows:
1. Lösen der Schrauben 6 1. Loosen the screws 6
2. Entfernen der defekten Platine 8 vom Kühlkörper 1 2. Remove the defective board 8 from the heat sink 1
3. Auflegen einer Ersatz-Platine 8 am Kühlkörper 1 3. Place a replacement board 8 on the heat sink 1
4. Befestigen der Schrauben 6  4. Attach the screws 6

Claims

Patentansprüche : Claims:
1. Beleuchtungsvorrichtung umfassend einen plattenförmigen Träger, auf dem wenigstens eine Leuchtdiode angeordnet ist und welcher elektrische Kontakte für die Stromversorgung der wenigstens einen Leuchtdiode aufweist, einen lösb IUIt dem plat- tenförmigen Träger befestigten Kühlkörper, wobei der Kühlkörper eine mit dem plattenförmigen Träger in flächigen Kontakt bringbare Oberfläche aufweist, und Verbindungsmittel zum lösbaren Befestigen des plattenförmigen Trägers am Kühlkörper, dadurch gekennzeichnet, dass die Verbindungsmittel (6) aus einem elektrisch leitfähigen Material bestehen und im am Kühlkörper (1) befestigten Zustand des plattenförmigen Trägers (8) mit den elektrischen Kontakten (9) zusammenwirken, um die wenigstens eine Leuchtdiode mit der Stromversorgung zu verbinden. 1. lighting device comprising a plate-shaped support on which at least one light-emitting diode is arranged and which has electrical contacts for the power supply of the at least one light emitting diode, a lösb IUIt the plate-shaped carrier mounted heat sink, wherein the heat sink with the plate-shaped carrier in surface contact Can be brought surface and connecting means for releasably securing the plate-shaped support on the heat sink, characterized in that the connecting means (6) consist of an electrically conductive material and in the heat sink (1) fixed state of the plate-shaped support (8) with the electrical contacts ( 9) cooperate to connect the at least one light emitting diode to the power supply.
2. Beleuchtungsvorrichtung nach Anspruch 1, dadurch gekenn¬ zeichnet, dass der plattenförmige Träger (8) als Platine ausgebildet ist und dass die elektrischen Kontakte (9) als auf der Platine (8) ausgebildete Kontaktflächen ausgebildet sind. 2. Lighting device according to claim 1, characterized marked ¬ characterized in that the plate-shaped carrier (8) is designed as a circuit board and that the electrical contacts (9) as formed on the board (8) contact surfaces are formed.
3. Beleuchtungsvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Verbindungsmittel (6) im am Kühlkörper (1) befestigten Zustand des plattenförmigen Trägers (8) eine elektrische Verbindung zwischen den am plattenförmigen Träger (8) angeordneten elektrischen Kontakten (9) und an der dem plattenförmigen Träger (8) abgewandten Seite des Kühlkörpers (1) angeschlossenen elektrischen Leitern der Stromversorgung herstellen . 3. Lighting device according to claim 1 or 2, characterized in that the connecting means (6) in the heat sink (1) fixed state of the plate-shaped carrier (8) has an electrical connection between the plate-shaped carrier (8) arranged electrical contacts (9) and on the side facing away from the plate-shaped carrier (8) side of the heat sink (1) connected electrical conductors of the power supply.
4. Beleuchtungsvorrichtung nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass die Verbindungsmittel (6) wenigstens zwei Schrauben umfassen, die Ausnehmungen (11) des plattenförmigen Trägers (8) durchsetzen und im eingeschraubten Zustand jeweils einen mit dem elektrischen Leiter der Stromversorgung elektrisch verbundenen Bauteil (4) kontaktieren. 4. Lighting device according to claim 1, 2 or 3, characterized in that the connecting means (6) comprise at least two screws, the recesses (11) of the plate-shaped Pass through the support (8) and contact in the screwed state each one electrically connected to the electrical conductor of the power supply component (4).
5. Beleuchtungsvorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass der mit dem elektrischen Leiter der Stromversorgung elektrisch verbundene Bauteil (4) in einer axialen Durchbrechung des Kühlkörpers (1) aufgenommen ist. 5. Lighting device according to claim 4, characterized in that the electrically connected to the electrical conductor of the power supply component (4) is accommodated in an axial opening of the heat sink (1).
6. Beleuchtungsvorrichtung nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass ein Außengewinde der Schrauben (6) jeweils mit einem Innengewinde eines drehfest in dem Kühlkörper (1) aufgenommenen Bauteils (4) zusammen irkt. 6. Lighting device according to claim 4 or 5, characterized in that an external thread of the screws (6) in each case with an internal thread of a rotationally fixed in the heat sink (1) recorded component (4) together.
7. Beleuchtungsvorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass der drehfest in dem Kühlkörper (1) aufgenommene Bauteil (4) von einer Buchse aus elektrisch leitendem Metall gebildet ist, der mit dem elektrischen Leiter für die Stromversorgung der Leuchtdiode elektrisch verbunden ist. 7. Lighting device according to claim 6, characterized in that the rotationally fixed in the heat sink (1) recorded component (4) is formed by a socket of electrically conductive metal, which is electrically connected to the electrical conductor for the power supply of the light emitting diode.
8. Beleuchtungsvorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass die Buchse (4) unter Zwischenschaltung einer sie umgebenden Isolierhülse (5) in dem Kühlkörper (1) aufgenommen ist . 8. Lighting device according to claim 7, characterized in that the bush (4) with the interposition of a surrounding insulating sleeve (5) in the heat sink (1) is added.
9. Beleuchtungsvorrichtung nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass die Buchse (4) so in dem Kühlkörper (1) aufgenommen ist, dass sie gegenüber der mit dem plattenförmigen Träger (8) in flächigen Kontakt bringbaren Oberfläche des Kühl- körpers (1) zurückversetzt ist. 9. Lighting device according to claim 7 or 8, characterized in that the bushing (4) is accommodated in the cooling body (1) in such a way that it can be brought into contact with the plate-shaped carrier (8) in area contact with the surface of the cooling body (1 ) is set back.
10. Beleuchtungsvorrichtung nach einem der Ansprüche 4 bis 9, dadurch gekennzeichnet, dass die Ausnehmungen (11) am Umfang des plattenförmigen Trägers (8) ausgebildet sind. 10. Lighting device according to one of claims 4 to 9, characterized in that the recesses (11) are formed on the circumference of the plate-shaped carrier (8).
PCT/AT2013/000144 2012-09-04 2013-09-04 Lighting device WO2014036579A1 (en)

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ATA969/2012A AT513328B1 (en) 2012-09-04 2012-09-04 lighting device
ATA969/2012 2012-09-04

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GB2564566A (en) * 2017-06-28 2019-01-16 Conservation Tech Of Illinois Llc Powering and fastening a light emitting diode or chip-on-board component to a heatsink

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