SE539568C2

SE539568C2 - A lighting device

Info

Publication number: SE539568C2
Application number: SE1650149A
Authority: SE
Inventors: Åkerström Johan
Original assignee: Åkerström Johan
Priority date: 2016-02-08
Filing date: 2016-02-08
Publication date: 2017-10-17
Also published as: EP3203145A1; SE1650149A1

Abstract

ABSTRACT A lighting device comprising a base element (2), a solid state lightinglight source demountably mounted at the base element, and a light guidingoptical unit (4) demountably mounted at the base element, for guiding lightemitted by the light source. The base element comprises a support seat (5)arranged for receiving an external support protrusion, and electrical wiringconnected with the light source and with a cable interface, and extending past the support seat. Figure elected for publication purposes: Fig. 1

Description

The present invention relates to a Iighting device with a solid statelighting light source.

BACKGROUND OF THE INVENTION A conventional Iighting device, such as a table lamp, a bed lamp, a or aceiling lamp, has some kind of a supporting structure, such as a lamp foot, ora support plate to be fastened at a wall or in the ceiling, and further a lamp-shade or a reflector for screening or directing the light, and a socket forreceiving an exchangeable bulb, such as an old style bulb, a spotlight, or aLED bulb. The Iighting device also has electrical wiring and contactsintegrated with the supporting structure and ending with a cable with a plug,for LED applications including a transformer, at the end to be inserted into amains socket, orjust loose wires to be connected to a wire holder, typically formounting at the ceiling. Since the LED light sources have been developed tolast for a long time, such as 10 000 hours or more, also lamps with fixed, i.e.non-exchangeable, LED light sources have been put on the market. They aresupposed to last for many years and when the LED light source fails the lampis supposed to have become outdated, so that the user will buy a new one.

From a sustainability point of view the lamps with a fixed light sourceare undesirable. As regards the lamps with replaceable LED bulbs there isstill a risk that the user has become tired of the lamp when it is time toexchange the LED bulb and will through away the whole lamp although that isnot necessary from a perspective of functionality.

Because the lamps are complex products involving many differentmaterials combined and mounted in a way that makes them difficult torecycle, they have or will become an environmental problem.

SUMMARY OF THE INVENTION lt would be advantageous to provide a LED lighting solution whichavoids or at least reduces the sustainability problem of the current lightingdevices.

To better address this concern, in a first aspect of the invention there ispresented a lighting device comprising a base element, a solid state lightinglight source demountably mounted at the base element, and a light guidingoptical unit demountably mounted at the base element, for guiding lightemitted by the light source. The base element comprises a support seatarranged for receiving an external support protrusion, electrical wiringconnected with the light source and with a cable interface, and extending pastthe support seat. Thereby, the lighting device includes demountable partsand, in turn, is mountable at any kind of support protrusion. The supportprotrusion can be part of a very simple single material support structure, oreasily separable and recyclable support structure, which can also be replacedat any time with another one. Further, the support structure can be a lampfoot, a flexible arm, or any kind of supporting structure, which is fullyseparated from the electrical parts, which are included in the very lightingdevice. Consequently, the sustainability problem has been solved or at leastreduced. lt should be noted that the expression “solid state lighting” is welldefined within the field of lighting devices, and is understood by the personskilled in the art as particular types of light sources such as LEDs (LightEmitting Diodes), and OLEDs (Organic Light Emitting Diodes), etc., and anysimilar light sources that may come in the future. ln accordance with an embodiment of the lighting device the supportseat is constituted by a hole through the base element. This is a simplesolution useful with a vast number of supporting structures. ln accordance with an embodiment of the lighting device the hole isgenerally circular and is provided with a rotation preventing portion at itsperiphery. ln accordance with an embodiment of the lighting device the cableinterface comprises a connector, which is connectable with a mating connector of a cable. Thereby cable can be arranged individually at thesupporting structure before connecting it to the connector of the cableinterface. ln accordance with an embodiment of the lighting device the connectoris a magnet connector for holding the connector of the cable. ln accordance with an embodiment of the lighting device the baseelement comprises a lid element covering a groove through which theelectrical wiring passes adjacent to at least a portion of the support seat. Thisembodiment further facilitates assembling and disassembling the lightinginterface. ln accordance with an embodiment of the lighting device the lidelement includes the connector. ln accordance with an embodiment of the lighting device the baseelement is made of a metal and comprises cooling portions. ln accordance with an embodiment of the lighting device the baseelement comprises an elongated recess at one end thereof, wherein the lightsource is elongated and is demountably received in the recess. ln accordance with another aspect of the invention, there is provided alighting system comprising a cable with a connector at each end thereof, anda light source driver device, wherein the light source driver device comprisesa plug portion for mating with a mains socket, and several terminals, eacharranged for mating with the connector of the cable. According to this aspecta further advantage is that several lighting devices can be connected to asingle light source device. ln accordance with an embodiment of the lighting system the lightsource driver device comprises a mains socket, which is electricallyconnected with the plug portion.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be described in more detail and with referenceto the appended drawings in which: Fig. 1 is a perspective view of an embodiment of a lighting deviceaccording to the present invention; Fig. 2 is an exploded view of an embodiment of a lighting systemaccording to the present invention; andFig. 3 is a perspective view of a part of the lighting device shown in Fig.

DESCRIPTION OF EMBODIMENTS According to an embodiment of the lighting device 1 it comprises baseelement 2, a solid state lighting light source 3, which is a LED light source,and a light guiding optical unit 4 for guiding light emitted by the light source.The base element 2 comprises a support seat 5 arranged for receiving anexternal support protrusion 8 of a support structure 16, and electrical wiring 6connected with the light source 3 and with a cable interface 7 arranged at afirst end 9 of the base element 2.

The light source 3 is demountably mounted at the base element 2.More particularly, the light source 3 is an elongated LED plate, which hasbeen demountably received in a likewise elongated recess 10 at a secondend 11 of the base element 2, opposite to the first end 9. The light source 3 isheld in place by the optical unit 4, which is mechanically attached to the baseelement 2, and which covers the recess 10. More particularly, the optical unit4 has an elongated protrusion 12, which extends into the recess 10 and whichis provided with a retaining groove 13 at each end. The base element 2further comprises a retaining pin seat 14 and a retaining pin, for instance aspring pin, 15 extending in the retaining pin seat 14 transversally of the baseelement 2, at each end of the recess 10. Each retaining groove 13 is alignedwith the respective retaining pin seat 14 and extends in parallel with theretaining pin 15 and is engaged with the retaining pin 15. Thereby, theretaining pins 15 retain the optical unit 4 at the base element 2 while makingthe optical unit 4 easily demountable from the base element by just removingthe retaining pins 15. lt is obvious to the person skilled in the art that althoughthis attachment of the optical unit 4 to the base element 2 is advantageousseveral other mechanical attachment solutions are possible, like differentkinds of snap locks, spring biased locking elements, etc. The optical unit 4can be any light guiding part, such as a prism, an opaque part, or any other suitable optical element affecting the emitted light by for example scattering,diffusing, or refracting the light. ln this embodiment, the support seat 5 is a through hole, which isgenerally Circular, and which has a rotation preventing portion 17 at itsperiphery. The rotation preventing portion 17 is a notch. The supportprotrusion 8 is provided with a corresponding ridge 18, which is received inthe rotation preventing portion 17. Many other shapes of the support seat andthe rotation preventing portion are feasible, as understood by the personskilled in the art, such as a triangular or polygonal hole, which are rotationpreventing per se, and provides several distinct mounting positions for thelighting device 1, while the generally circular hole provides for a simplemanufacturing of the support protrusion 8. lt should also be noted that the support structure exemplified in thedrawings is of course just one of countless alternatives. All the supportstructure will need is a suitable support protrusion 8.

The base element 2 further comprises a passage 19, or duct, partlyextending through the inner of the base element and partly as a groove of anedge surface of the base element covered by a demountable lid element 20.The groove part of the passage 19 is curved and extends past the supportseat 5, adjacent to the support seat 5. The lid element 20 is correspondinglyarc shaped and includes the cable interface 7. The electrical wiring 6 runsthrough the passage 19 between the cable interface 7 and the LED plate 3.The cable interface 7 comprises, and in this embodiment is constituted by, aconnector, which is connectable with a mating connector 22 of a cable 23.The electrical wiring 6 is thus connected to the connector 7. The connectors7, 22 preferably are arranged for a quick connection and disconnection. Forinstance, the connectors 7, 22 are magnet connectors for magneticallyholding the connectors together, or they are female and male connectorsbeing retained in a connected state by means of friction and/or a snap lock.

The cable interface 7 can alternatively comprise a fastener for directlyattaching the wires of the cable 23.

The base element 2 is made of a metal, such as aluminum, and it isprovided with cooling elements 25, such as the grooves indicated in thefigures or flanges. ln accordance with an embodiment of a lighting system including thelighting device 1, the lighting system 30 furthermore comprises the cable 23with a connector 22, 24 at each end thereof, and a light source driver device27. The light source driver device 27 comprises a plug portion 28 for matingwith a mains socket, and several terminals 29, each arranged for mating withthe connector 24 of the cable 23 adapted for the terminals 29. The otherconnector 22 of the cable 23 is arranged for mating with the cableinterface/connector 7 of the base element 2. The light source driver device 27comprises a mains socket 31, which is electrically connected with the plugportion. Additionally, but not shown, the light source driver device 27comprises an interiorly mounted transformer and rectifier arrangement forconverting the mains power to DC power suitable for driving the LED plate 3.A dimmer 32 is optionally mounted at the cable 23.

As is evident from the description above, the lighting device 1 isarranged to be easily demounted into different materials in order to facilitaterecycling thereof.

While the invention has been illustrated and described in detail in thedrawings and foregoing description, such illustration and description are to beconsidered illustrative or exemplary and not restrictive; the invention is notlimited to the disclosed embodiments.

Other variations to the disclosed embodiments can be understood andeffected by those skilled in the art in practicing the claimed invention, from astudy of the drawings, the disclosure, and the appended claims. ln the claims,the word "comprising" does not exclude other elements or steps, and theindefinite article "a" or "an" does not exclude a plurality. The mere fact thatcertain measures are recited in mutually different dependent claims does notindicate that a combination of these measured cannot be used to advantage.Any reference signs in the claims should not be construed as limiting thescope.

Claims

1. A lighting device (1) comprising a base element (2), a solid statelighting light source (3) demountably mounted at the base element, and a lightguiding optical unit (4) demountably mounted at the base element, for guidinglight emitted by the light source, wherein the base element comprises asupport seat (5) arranged for receiving an external support protrusion, andelectrical wiring (6) connected with the light source and with a cable interface(7), and extending past the support seat.

2. The lighting device according to claim 1, wherein the support seat(5) is constituted by a hole through the base element (2).

3. The lighting device according to claim 1 or 2, wherein the hole (5) isgenerally circular and is provided with a rotation preventing portion (17) at itsperiphery.

4. The lighting device according to any one of the preceding claims,wherein the cable interface comprises a connector (7), which is connectablewith a mating connector (22) of a cable (23).

5. The lighting device according to claim 4, wherein the connector (7) isa magnet connector for magnetically holding the connector (22) of the cable(23).

6. The lighting device according to any one of the preceding claims,wherein the base element (2) comprises a lid element (20) covering a groove(19) through which the electrical wiring (6) passes adjacent to at least aportion of the support seat (5).

7. The lighting device according to claim 6 when dependent on claim 4or 5, wherein the lid element (20) includes the connector (7).

8. The lighting device according to any one of the preceding claims,wherein the base element (2) made of a metal and comprises coolingportions (25).

9. The lighting device according to any one of the preceding claims,wherein the base element (2) comprises an elongated recess (10) at one end(11) thereof, wherein the light source (3) is elongated and is demountablyreceived in the recess.

10. A lighting system (30) comprising a lighting device (1) according toany one of the preceding claims, a cable (23) with a connector (22, 24) ateach end thereof, and a light source driver device (27), wherein the lightsource driver device comprises a plug portion (28) for mating with a mainssocket, and several terminals (29), each arranged for mating with theconnector (24) of the cable.