EP2852790B1 - Led lamp holder - Google Patents
Led lamp holder Download PDFInfo
- Publication number
- EP2852790B1 EP2852790B1 EP13730318.6A EP13730318A EP2852790B1 EP 2852790 B1 EP2852790 B1 EP 2852790B1 EP 13730318 A EP13730318 A EP 13730318A EP 2852790 B1 EP2852790 B1 EP 2852790B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light source
- lamp holder
- support
- heat sink
- lamp
- 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
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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
- 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
Definitions
- the present invention relates to a LED lighting device, more particularly a lamp holder for light sources with replaceable LEDs integral with a heat sink.
- Document WO 2010/146509 A1 discloses a connector to connect a component to a heat sink, comprising a support for a light source, a LED light source, a connector for feeding said light source, wherein the heat sink has means for fixing it to a lamp, where the connection is achieved by a bajonet joint and the heat sink is not a load bearing structure of the device, and replacement of the LED light source requires disassembly of the printed circuit board.
- the LED lamp holder according to the present invention is designed in order to avoid the above mentioned drawbacks of adaptability and heat generation, providing for a lamp holder that in a preferred embodiment is made integral with the heat sink, which in turn may be interfaced on one hand with the light source and on the other hand with any lamp.
- the main object of the present invention is to provide a lamp holder for LED light sources, that may be used as alternative or substitution for the traditional lamp holders, either for new or existing lamps.
- an object of the present invention is to provide a lamp holder for LED light sources, wherein heat dissipation is efficiently achieved by a passive device.
- the heat sink 10 is a cylindrical body of extruded aluminum, so as to obtain a set of winglets 12 radially extending outwards from its central cavity or through hole 14. At positions axially symmetrical to the longitudinal axis of said cavity, three winglets 12a have a greater thickness than the remaining winglets 12 and a preferably threaded bore 12b, in which a first end 72 of said brass tubes 70 is screwed.
- the through hole 14 too is internally threaded at both ends 14a and 14b.
- the heat sink 10 approximately at its median portion has a flange 18 with the function of abutment for attachment elements to a lamp (not shown) such as collar 60.
- the flange divides the outer surface of the heat sink in a first portion 10a (facing the support 20 and the corresponding light source) and a second portion 10b.
- Portion 10a is advantageously threaded to allow connection with the collar 60 (or similar connection element with a lamp body) which is internally threaded.
- support 20 comprising a disc 22, on whose upper surface 22a there is a seat into which the light source or board SMD-LED 30 may be slidingly inserted; in said seat electric contacts are also fixed, made of C-bent metal plates: the upper side of the C-bend of each plate is in contact with a terminal of the SMD board, while the lower side is connected to a pin which, through suitable holes made in the seat, passes through the disc 22 body and comes out from the lower surface 22b of the disc. From said lower circular surface 22b of disc 20, two approximately circular surfaces 24 are extended and externally threaded for engaging the thread 14a of the heat sink 10.
- More particularly surfaces 24 are so dimensioned as to receive and hold by friction a connector 50, into which the above mentioned electric pins are inserted. Finally, from connector 50 a pair of feeding wires 52 extended to traverse the cavity 14 of the heat sink 10 and available for the connection of an external power source (not shown). Therefore in this way the electric circuit of the lamp holder is defined, allowing to feed the LED light source just like a traditional lamp holder for incandescent or bulb light sources.
- a lens 40 consists of a ring 42 and a member 44 that may be transparent, opaque or anyway treated for a correct diffusion of the light emitted by the LED.
- Ring 42 is made integral with protrusions 46 diametrically opposed and so shaped as to snap engage the above described support disc 20.
- said lamp holder 100 fully achieves the above indicated objects of adaptability to existing lamps as well as to lamps of novel conception, without needing any modification thereof. Even the problem of overheating the lamp holder is solved by adopting the passive heat sink 10 with great thermal exchange surface, thus avoiding adoption of noisy ventilation systems involving additional energy consumption. Besides adaptability one can see also a considerable ease of replacement of the light source, by removing the lens and simply sliding the board out from the support seat, said replacement being required not only in the event of failure but also in case of another LED with different lighting characteristics.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
- Fastening Of Light Sources Or Lamp Holders (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Description
- The present invention relates to a LED lighting device, more particularly a lamp holder for light sources with replaceable LEDs integral with a heat sink.
- It is well known that use of lighting devices exploiting a LED as light source, increased considerably in recent years. The present trend to use this lighting technology is due to economic as well as performance grounds. To a better quality of light produced by a LED when compared to the traditional incandescent or fluorescent lamps, a considerably reduced energy consumption is added. However the clear advantages of the LED technology are accompanied by non negletable difficulties of application: just to mention the most important ones, the complexity and specificity of the control circuit for the LED source as well as the considerable heat produced by its operation, must be taken into account.
- Document
WO 2010/146509 A1 discloses a connector to connect a component to a heat sink, comprising a support for a light source, a LED light source, a connector for feeding said light source, wherein the heat sink has means for fixing it to a lamp, where the connection is achieved by a bajonet joint and the heat sink is not a load bearing structure of the device, and replacement of the LED light source requires disassembly of the printed circuit board. - Document
WO 2010/108906 A1 discloses a device similar to the above discussed document, wherein the heat sink is again an element not being part of the device bearing structure and is not provided with means for fixing directly to a lamp but is only integrated in a LED module. - Document
EP 2339230 A2 discloses a very complex LED lighting assembly that is not suitable to support a simple lamp and is not provided with a heat sink used as a bearing structure of the assembly. - The LED lamp holder according to the present invention is designed in order to avoid the above mentioned drawbacks of adaptability and heat generation, providing for a lamp holder that in a preferred embodiment is made integral with the heat sink, which in turn may be interfaced on one hand with the light source and on the other hand with any lamp.
- The LED lamp holder of the present invention, as it will be described in detail hereinafter, lends itself to replace in the existing lamps, the traditional lamp holders, such as those for incandescent or bulb lamps or any other known type.
- Thus the main object of the present invention is to provide a lamp holder for LED light sources, that may be used as alternative or substitution for the traditional lamp holders, either for new or existing lamps.
- Another object of the present invention is to provide a lamp holder for LED light sources, wherein it may be possible to replace only the LED light source, either in case of failure of the existing one or in case of installing a new LED source with different lighting characteristics.
- Finally an object of the present invention is to provide a lamp holder for LED light sources, wherein heat dissipation is efficiently achieved by a passive device.
- These and other characteristics of the LED lamp holder of the present invention will be apparent by reading the following detailed description of a preferred embodiment to be taken together with the accompanying sheets of drawings, where equal or similar elements are identified with the same reference numerals, and in which:
-
Fig. 1 is an exploded perspective view of the LED lamp holder according to the preferred embodiment of the present invention; -
Fig. 2 is a second exploded perspective view of the lamp holder ofFig. 1 ; -
Fig. 3 is an exploded perspective view of some components of the lamp holder ofFig. 1 ; -
Fig. 4 is a second exploded perspective view of the components ofFig. 3 ; -
Fig. 5 is a perspective view of the heat sink of the lamp holder of the preceding figures; -
Fig. 6 is a second perspective view of the heat sink ofFig. 5 ; and -
Fig. 7 is the support of the LED light source used in the lamp holder of the preceding figures. - With reference now to
Figures 1 and2 , thelamp holder 100 of the present invention comprises acylindrical heat sink 10, asupport 20 for aLED light source 30, alens 40 applicable to saidsupport 20, and aconnector 50 for feeding the LED source. Moreover inFig. 1 and2 two different systems of mounting the lamp holder to a generic lamp are shown: a threadedcollar 60, being only part of a lamp, and a group of threetubular members 70 adopted for some types of lamps, such as a lamp shade. - The
heat sink 10 is a cylindrical body of extruded aluminum, so as to obtain a set ofwinglets 12 radially extending outwards from its central cavity or throughhole 14. At positions axially symmetrical to the longitudinal axis of said cavity, threewinglets 12a have a greater thickness than theremaining winglets 12 and a preferably threadedbore 12b, in which afirst end 72 of saidbrass tubes 70 is screwed. The throughhole 14 too is internally threaded at bothends flange 18 with the function of abutment for attachment elements to a lamp (not shown) such ascollar 60. Moreover the flange divides the outer surface of the heat sink in afirst portion 10a (facing thesupport 20 and the corresponding light source) and asecond portion 10b.Portion 10a is advantageously threaded to allow connection with the collar 60 (or similar connection element with a lamp body) which is internally threaded. - In
Figures 2-4 and7 one can see at various degrees of detail,support 20 comprising a disc 22, on whoseupper surface 22a there is a seat into which the light source or board SMD-LED 30 may be slidingly inserted; in said seat electric contacts are also fixed, made of C-bent metal plates: the upper side of the C-bend of each plate is in contact with a terminal of the SMD board, while the lower side is connected to a pin which, through suitable holes made in the seat, passes through the disc 22 body and comes out from thelower surface 22b of the disc. From said lowercircular surface 22b ofdisc 20, two approximatelycircular surfaces 24 are extended and externally threaded for engaging thethread 14a of theheat sink 10. More particularlysurfaces 24 are so dimensioned as to receive and hold by friction aconnector 50, into which the above mentioned electric pins are inserted. Finally, from connector 50 a pair offeeding wires 52 extended to traverse thecavity 14 of theheat sink 10 and available for the connection of an external power source (not shown). Therefore in this way the electric circuit of the lamp holder is defined, allowing to feed the LED light source just like a traditional lamp holder for incandescent or bulb light sources. - At last, as shown in the preceding figures, a
lens 40 consists of aring 42 and amember 44 that may be transparent, opaque or anyway treated for a correct diffusion of the light emitted by the LED.Ring 42 is made integral withprotrusions 46 diametrically opposed and so shaped as to snap engage the above describedsupport disc 20. - From the detailed description of the
lamp holder 100 according to a preferred embodiment of the present invention, it is to be pointed out that said lamp holder fully achieves the above indicated objects of adaptability to existing lamps as well as to lamps of novel conception, without needing any modification thereof. Even the problem of overheating the lamp holder is solved by adopting thepassive heat sink 10 with great thermal exchange surface, thus avoiding adoption of noisy ventilation systems involving additional energy consumption. Besides adaptability one can see also a considerable ease of replacement of the light source, by removing the lens and simply sliding the board out from the support seat, said replacement being required not only in the event of failure but also in case of another LED with different lighting characteristics. - Finally it has to be pointed out that the constructional features of the
lamp holder 100 according to the preferred embodiment of the present invention, may be modified or changed in alternative embodiments. For instance, all the systems of fixing or fastening the parts may be changed, more particularly other attachment or connection systems may be adopted instead of threads. In a similar way, the forms and dimensions of the cooling winglets of the heat sink may be changed, merely by choosing different extrusion dies for thealuminum body 10. These and other variations to the preferred embodiment of the lamp holder of the present invention are however falling within the scope of protection as defined in the appended claims.
Claims (3)
- A lamp holder (100) suitable for a LED light source (30) comprising a heat sink (10) for said LED light source, a support (20) for said LED light source, a LED light source (30); and a connector (50) for electric supply of said LED light source, wherein said heat sink (10) constitutes the bearing structure of the lamp holder, is provided with cooling winglets (12) and has means for direct fixing to a lamp, and means for fixing to said support (20); said support (20) comprising electrical connection means between said source (30) and said connector (50), said source (30) being in turn slideably insertable in a seat (22a) of said support (20), said fixing means being threads (10a) formed on the outer surface formed by said winglets (12) of said heat sink for a threaded coupling with a supporting members of a lamp, characterized in that the heat sink (10) is provided with additional fixing means comprising threaded bores (12b) made on winglets (12a) of greater thickness and having the axes extending along a radial direction of said heat sink (10), and the end (72) of elongated members (70) are screwed into said threaded bores (12b), said elongated members (70) being in turn connected to supporting members of a lamp.
- The lamp holder according to claim 1, wherein said means for fixing to said support (20) are threaded bores (14a) and said support (20) of said light source (30) has surfaces (24) protruding therefrom being threaded for coupling with said means (14a).
- The lamp holder according to claim 1 or 2, wherein said support (20) of said light source (30) has a seat (22a) for said light source in turn comprising electrical contacts for said light source between said light source and electric terminals, preferably in the form of pins.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL13730318T PL2852790T3 (en) | 2012-05-22 | 2013-05-21 | Led lamp holder |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000886A ITMI20120886A1 (en) | 2012-05-22 | 2012-05-22 | LED LAMP HOLDER |
PCT/IB2013/001047 WO2013175300A1 (en) | 2012-05-22 | 2013-05-21 | Led lamp holder |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2852790A1 EP2852790A1 (en) | 2015-04-01 |
EP2852790B1 true EP2852790B1 (en) | 2016-12-14 |
Family
ID=46466679
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13730318.6A Active EP2852790B1 (en) | 2012-05-22 | 2013-05-21 | Led lamp holder |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2852790B1 (en) |
ES (1) | ES2618510T3 (en) |
IT (1) | ITMI20120886A1 (en) |
PL (1) | PL2852790T3 (en) |
WO (1) | WO2013175300A1 (en) |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009014485A1 (en) * | 2009-03-23 | 2010-09-30 | Ledon Lighting Jennersdorf Gmbh | LED light |
RU2571194C2 (en) * | 2009-06-17 | 2015-12-20 | Конинклейке Филипс Электроникс Н.В. | Connector for connection of component to heat sink |
US8235549B2 (en) * | 2009-12-09 | 2012-08-07 | Tyco Electronics Corporation | Solid state lighting assembly |
-
2012
- 2012-05-22 IT IT000886A patent/ITMI20120886A1/en unknown
-
2013
- 2013-05-21 ES ES13730318.6T patent/ES2618510T3/en active Active
- 2013-05-21 EP EP13730318.6A patent/EP2852790B1/en active Active
- 2013-05-21 WO PCT/IB2013/001047 patent/WO2013175300A1/en active Application Filing
- 2013-05-21 PL PL13730318T patent/PL2852790T3/en unknown
Also Published As
Publication number | Publication date |
---|---|
PL2852790T3 (en) | 2017-06-30 |
ITMI20120886A1 (en) | 2013-11-23 |
EP2852790A1 (en) | 2015-04-01 |
WO2013175300A1 (en) | 2013-11-28 |
ES2618510T3 (en) | 2017-06-21 |
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