EP2852790A1 - Led lamp holder - Google Patents

Led lamp holder

Info

Publication number
EP2852790A1
EP2852790A1 EP13730318.6A EP13730318A EP2852790A1 EP 2852790 A1 EP2852790 A1 EP 2852790A1 EP 13730318 A EP13730318 A EP 13730318A EP 2852790 A1 EP2852790 A1 EP 2852790A1
Authority
EP
European Patent Office
Prior art keywords
light source
lamp holder
heat sink
support
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.)
Granted
Application number
EP13730318.6A
Other languages
German (de)
French (fr)
Other versions
EP2852790B1 (en
Inventor
Marco Gaeta
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to PL13730318T priority Critical patent/PL2852790T3/en
Publication of EP2852790A1 publication Critical patent/EP2852790A1/en
Application granted granted Critical
Publication of EP2852790B1 publication Critical patent/EP2852790B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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

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.
  • 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 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.
  • 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.
  • 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.
  • 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 of Fig. 1 ;
  • Fig. 3 is an exploded perspective view of some components of the lamp holder of Fig. 1 ;
  • Fig. 4 is a second exploded perspective view of the components of Fig. 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 of Fig. 5;
  • Fig. 7 is the support of the LED light source used in the lamp holder of the preceding figures.
  • the lamp holder 100 of the present invention comprises a cylindrical heat sink 10, a support 20 for a LED light source 30, a lens 40 applicable to said support 20, and a connector 50 for feeding the LED source.
  • a threaded collar 60 being only part of a lamp
  • a group of three tubular 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 of winglets 12 radially extending outwards from its central cavity or through hole 14.
  • 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. Moreover 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.
  • the constructional features of the lamp holder 100 may be modified or changed in alternative embodiments.
  • 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.
  • the forms and dimensions of the cooling winglets of the heat sink may be changed, merely by choosing different extrusion dies for the aluminum body 10.

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)

Abstract

A lamp holder (100) for LED light sources (30) is disclosed, comprising a passive heat sink (10), made by extrusion of a cylindrical aluminum body, on which the SMD-LED light source is fixed by a suitable support (20). Said support has an internal electric circuit, in turn connected to a connector (50) disposed in said support, for feeding the LED with previous connection of the connector to an external feeding source. The heat sink (10) and the entire lamp holder, may be fixed to a lamp by means of threaded connections (10a)made in the heat sink or tubular members to be attached to said heat sink.

Description

LED LAMP HOLDER
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 of Fig. 1 ; Fig. 3 is an exploded perspective view of some components of the lamp holder of Fig. 1 ;
Fig. 4 is a second exploded perspective view of the components of Fig. 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 of Fig. 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 and 2, the lamp holder 100 of the present invention comprises a cylindrical heat sink 10, a support 20 for a LED light source 30, a lens 40 applicable to said support 20, and a connector 50 for feeding the LED source. Moreover in Fig. 1 and 2 two different systems of mounting the lamp holder to a generic lamp are shown: a threaded collar 60, being only part of a lamp, and a group of three tubular 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 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. As shown in the drawings, 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. Moreover 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.
In Figures 2-4 and 7 one can see at various degrees of detail, 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.
At last, as shown in the preceding figures, 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.
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 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.
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 the aluminum 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

Claims
1. 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 (10a, 12b) 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), characterized in that said fixing means are 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.
2. The lamp holder according to claim 1 , wherein said fixing means are threaded bores (12b) made on winglets (12a) of greater thickness and having the axes extending preferably along a radial direction of said heat sink (10) and are adapted to be coupled with elongated members (70) in turn connected to supporting members of a lamp.
3. 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).
4. The lamp holder according to one or more of the preceding claims, 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.
EP13730318.6A 2012-05-22 2013-05-21 Led lamp holder Active EP2852790B1 (en)

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 true EP2852790A1 (en) 2015-04-01
EP2852790B1 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)

* Cited by examiner, † Cited by third party
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2013175300A1 *

Also Published As

Publication number Publication date
WO2013175300A1 (en) 2013-11-28
EP2852790B1 (en) 2016-12-14
PL2852790T3 (en) 2017-06-30
ITMI20120886A1 (en) 2013-11-23
ES2618510T3 (en) 2017-06-21

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