DE102008055864A1 - LED light - Google Patents

Abstract

The invention relates to an LED lamp (1) having an LED module (2) with at least one LED as a lighting means and a heat sink (3). The LED module (2) is thermally connected to the heat sink (3) for dissipating heat that can be generated by the LED. Furthermore, the LED light (1) has means for tool-free release and restore the connection between the LED module (2) and the heat sink (3). These means may, for example, be a bayonet closure with two pin-like elements (10, 11). To replace the LED module (2) only this must be replaced. The heat sink (3) and possibly other components of the LED light (1), such as a control gear and power cable, can remain in the installed state at the installation. In addition, the LED lamp (1) can be maintained particularly easily, because by releasing the LED module (2) from the heat sink (3) the accessibility to the LED module (2) and to those areas of LED module ( 2) and heat sink (3) is provided, which are provided for mutual contact.

Description

The Invention relates to an LED lamp (LED: light-emitting diode) with a LED module and a heat sink for the LED module. The LED module has at least one LED as the lighting means.

such LED lights are known in the art. In case of a defect of the LED module becomes common the complete lamp renewed. This is thus part of the Luminaire, namely the heat sink replaced, although this is still functional in itself. Even with the desire To change the optical properties of the LED light, so if, for example a different colored emission light is desired, is usually easy replaced the entire LED light.

Of the Invention is based on the object, an LED lamp with improved Ways to Influence on the radiation behavior of the lamp, as well as with improved Maintenance and repair options specify.

These Task is according to the invention with the one in the independent one Claim mentioned object solved. Special designs are in the dependent claims specified.

According to the invention An LED light is provided which is an LED module with at least an LED as a light source and a heat sink, wherein the LED module for the removal of heat, which can be generated by the LED, thermally connected to the heat sink is. Furthermore, the LED lamp means for tool-free release and restore the connection between the LED module and the heat sink.

By the means for tool-free release and Restore the connection between the LED module and the heat sink allows that in case of a defect of the LED module only this is replaced. Of the Heat sink, as well optionally other components of the LED light, for example a control gear and power cables, can remain in the installed position at the place of installation of the LED lamp. Also, a change of the LED module by another LED module, the For example, it has other optical properties in a simple way possible. Furthermore The LED light can be easily maintained because of a release of the LED module from the heat sink the accessibility to the LED module, as well as to those areas of LED module and Heat sink improved is intended for mutual contact.

Advantageous are the means are designed so that the connection by a relative rotational movement and a relative translational movement between the LED module and the heat sink dissolved and / or can be restored. For example, the means can be a bayonet closure comprise or consist of a bayonet closure. In this way let yourself achieve that in the connected state the LED module is pressed against the heat sink, what kind of the heat transfer from the LED module to the heat sink conducive is. Furthermore A bayonet catch includes two pin-like elements, over which as well a good heat conduction allows is. In addition, you can the two pin-like elements as electrical contacts to the power supply the LED can be used.

For example can the means a so-called, known per se from the prior art, Include GU10 socket, which is preferably provided on the heat sink. hereby it will be for one Users possible, by a simple and him possibly already familiar sequence of motion the LED module from the heat sink to solve or the connect both parts together.

The heat transfer will continue to be promoted, when the LED module has a module surface and the heat sink a Heatsink surface has, such that in the connected state, the module surface contacted the heat sink surface area.

Farther Advantageously, the LED module has an outer surface which is connected in the Condition an outer surface of the LED light forms. Also in this way the heat dissipation promoted by the LED module. For example, the outer surface of the LED module a cylindrical area be; In this case, the size of the area can be through Varying the length easily the specific requirements with regard to the heat output of the LED module can be adjusted.

Farther Advantageously, the LED light on an optical element, for example a Entblendungstubus or a reflector, wherein the optical Element is held on the LED module such that it is without tools reversibly released from the LED module can be. This will enable that easily changed the light output from the LED light or can be further influenced. A particularly easy way is given when the optical element by means of a latching connection attached to the LED module.

The possibilities of changing the radiated light can continue to increase when the optical element pivotally mounted on the LED module is held. Particularly advantageous is the arrangement such that the optical element with respect to the LED module can be rotated by 360 °.

Advantageous the LED lamp is still a lamp operating device, wherein the lamp operating device preferably over a support arm with the heat sink and / or connected to the LED module.

The LED light is particularly beneficial if it is an LED spotlight or an LED downlight is.

The Invention will be described below with reference to an embodiment and with reference closer to the drawings explained. Show it:

1 3 is a schematic perspective view of a first exemplary embodiment of an LED luminaire according to the invention in the form of an LED radiator,

2 a view like 1 , but with removed blinding tube,

3 a schematic view of separate components of the LED light,

4 and 5 Views like 3 but from different perspectives,

6 a sketchy view of different lenses for the LED light,

7 another view of the LED lamp, with lamp operating device,

8th two LED lights on a common busbar,

9 a schematic view of separate components of a second embodiment of an LED lamp according to the invention,

10 and 11 further views of the second embodiment,

12 three LED lights according to the second embodiment on a common busbar,

13a . 13b . 13c three views of the second embodiment, including lamp operating device, from different directions,

14a a view of a third embodiment, in which the LED light is designed as a downlight,

14b another view of the in 14a shown lamp, with indicated ceiling, in which the lamp is installed,

15a and 15b two further views of the third embodiment with changed set radiation angle, the 14a and 14b accordingly, and

16a and 16b two schematic cross sections through the third embodiment.

In 1 is a schematic view of a first embodiment of an LED lamp according to the invention 1 shown. The LED light 1 has an LED module 2 with at least one LED as the light source and a heat sink 3 on, with the LED module 2 for dissipating heat that can be generated by the LED thermally with the heat sink 3 connected is. As is known and indicated in the figures, the heat sink can 3 Have cooling fins.

The LED light 1 further includes means for tool-free release and restoration of the connection between the LED module 2 and the heat sink 3 on. In this way, the LED module 2 be easily replaced without the aid of a tool, without having to change the entire LED light 1 would be required. An exchange of the LED module 2 For example, it may be desirable to obtain other luminous properties, such as light in a different color. Even with a defect of a part of the LED module 2 For example, the LED, an exchange may be desired.

In the illustrated embodiment, the means are adapted to the connection by a relative rotational movement and a relative translational movement between the LED module 2 and the heat sink 3 to solve and / or restore, wherein the means comprise a bayonet closure or may be formed as such. Through a bayonet lock in the connected state, the LED module 2 against the heat sink 3 be pressed, creating a particularly good heat transfer from the LED module 2 to the heat sink 3 is possible.

In the 1 to 5 are the means for tool-free loosening and restoring the connection between the LED module 2 and the heat sink 3 indicated only very schematically. You can use two pen-like elements 10 . 11 as part of a bayonet lock, preferably on the LED module 2 are arranged and for that are provided in corresponding (in the 1 to 5 not shown) recesses in the heat sink 3 intervene. For example, the heat sink 3 For this purpose, a known per se from the prior art, so-called GU10 version include. This will allow the connection between the LED module 2 and the heat sink 3 can be achieved by a sequence of movements already familiar to many users as such. In addition, the two pen-like elements 10 . 11 as power contacts for the power supply from the heat sink to the LED module 2 be provided for powering the LED.

For particularly good heat conduction, the LED module 2 one in the 3 and 5 designated module surface 6 have and the heat sink in the 3 and 4 designated heat sink area 7 such that in the connected state, the module surface 6 the heat sink surface 7 contacted flatly.

In particular, the two pin-like elements 10 . 11 directly on the module surface 6 be arranged and the corresponding (in 4 not shown) recesses on the heat sink surface 7 ,

In the embodiment shown, the LED module 2 an outer surface 14 in the connected state, an outer surface of the LED light 1 forms. For example, this outer surface 14 of the LED module 2 be a cylindrical, for example, circular cylindrical outer surface. Also on this outer surface 14 Heat that can be generated by the LED during operation of the LED light can be dissipated to the outside.

Like from the 1 to 5 can be seen, the heat sink 3 also cylindrical, for example, be shaped circular cylindrical, the two cylinder shapes of LED module 2 on the one hand and heat sinks 3 on the other hand have the same radius. It can be provided that the LED module 2 - Seen in the direction of the corresponding cylinder main axis - at least half as long as the heat sink 3 ,

The LED module 2 can have in its interior a circuit board on which the at least one LED is arranged or a plurality of LEDs are arranged. It is advantageous in this case, the board good thermal conductivity with the outer surface 14 connected. For example, a thermal compound can be used for this purpose. Also, copper pins may be provided to transfer heat from the LED to the outer surface 14 transferred to. Copper pins may also or alternatively be provided to transfer heat from the LED to the module surface 6 to direct the heat flow to the heat sink in this way 3 to improve.

Furthermore, the LED light can 1 Have optical element, for example, a Entblendungstubus 4 or a reflector, wherein the optical element on the LED module 2 It is held that without tools from the LED module 2 can be reversibly solved. This allows the luminous properties of the LED lamp 1 in a simple way further influence.

For example, it can be provided that the optical element 4 by means of a latching connection to the LED module 2 is held. Particularly good influencing possibilities of the luminous properties arise when the optical element 4 swiveling on the LED module 2 is held. For example, the Entblendungstubus, as indicated in the figures, be designed asymmetrically, so that by a rotation of the Entblendungstubusses relative to the LED module 2 a change in direction of the emitted light can be effected. Accordingly advantageous is the optical element 4 opposite the LED module 2 rotatable by 360 °.

For example, in the edge area of the LED module 2 pointing towards the emission direction, a preferably circular recess may be provided into which the optical element 4 or the Entblendungstubus snapped and compared to the LED module 2 can be twisted.

As in the 3 to 5 indicated, can further improve the possibilities for influencing the emission of the LED light 1 be provided that a lens 5 between the LED module 2 and the optical element 4 can be arranged, the lens 5 into the interior of the LED module 2 can be provided protruding. As in 6 indicated, can have several different lenses 5 . 5 ' . 5 '' be provided so that by changing the light characteristics can be changed. For example, the different lenses may cause different emission aperture angles; as exemplified in 6 shown, the first lens 5 an opening angle of 8 ° to 10 ° cause a second lens 5 ' an opening angle of about 20 ° and a third lens 5 '' an opening angle of about 40 °.

The LED light shown above 1 can be designed as an LED spotlight. For this purpose, the LED light 1 as in the 1 to 5 and 7 indicated a support arm 20 have, on the one hand with the heat sink 2 is connected and on the other hand with a in 7 exemplified lamp operating device 25 , which can represent another component of the LED lamp and power lines with the LED module 2 can be connected. At the transition point between the support arm 20 and the heat sink 3 can be a first articulated connection 21 be provided at the transition point between the support arm 20 and the lamp operating device 25 a second articulated connection 22 , The first articulated connection 21 For example, for a pivoting of the heat sink 3 be provided about a horizontal axis, the second articulated connection 22 for example, for a pivoting of the heat sink 3 around a vertical axis.

In the embodiment shown in the 1 to 5 and 7 Outlined is the first articulated connection 21 at the edge of the heat sink 3 arranged, which points in the emission direction. The support arm 20 is bent so that the vertical axis of the second articulated connection 22 through the heat sink 3 runs. This causes a pivoting of the heat sink 3 allows, which requires very little space for movement.

The support arm 20 may alternatively or additionally also on the one hand with the lamp operating device 25 and on the other hand with the LED module 2 be connected.

As in 8th Outlined, several LED lights can 1 . 1' be provided, which has a preferably current-carrying rail 26 For example, each of the LED lights 1 . 1' with its own lamp operating device 25 . 25 ' can be connected.

In the 9 to 11 a second embodiment is shown in outline. The reference numerals are used in accordance with the above representations. In the following, only differences to the first embodiment will be discussed. Unless otherwise stated, the above descriptions also apply to the second embodiment.

The heat sink 3 has cooling fins, which are formed substantially radially symmetrical and differ in this respect from those of the heat sink of the first embodiment. In the first embodiment, the cooling fins are arranged substantially parallel.

The support arm 20 engages at that edge of the heat sink 3 on, which points against the emission direction.

In the 9 to 11 is an example of a lamp operating device 25 outlines; this can be done on a rail 26 be mounted in the power lines to the power supply of the lamp operating device 25 can run.

In 10 are on the heat sink surface 7 recesses 16 . 17 outlined in which the pin-like elements 10 . 11 of the LED module 3 can intervene. It can therefore be used to power the at least one LED of the LED module 2 Power cable to be provided by the lamp operating device 25 for example, within the support arm 20 proceeding to the recesses 16 . 17 on the heat sink surface 7 run. In the LED module 2 Then you can get more power cables from the pin-like elements 10 . 11 to the at least one LED run.

The lamp operating device 25 can be provided for the LED of the LED module 2 to switch and / or to dim.

The Lens 5 can latching in the second embodiment, regardless of a Entblendungstubus or other optical element on the LED module 2 to be ordered.

In 12 is exemplified the case in which three LED lights over a rail 26 are connected. In the 13a . 13b and 13c are three views of the LED lamp including the lamp operating device 25 shown, with the light from the rail 26 is removed. Here's hinted that the first articulated connection 21 can be provided for a pivoting range of 90 ° and the second articulated connection 22 for a swivel range of 360 °.

Of course, elements can the two embodiments combined to get another LED light; for example can for the second embodiment a defoliation tube, as shown in the first embodiment, be provided, etc.

As in the 14a to 16b illustrated, the LED lamp according to the invention can be designed as LED downlight.

Here, as in the 14a and 14b outlines the LED module 2 and the associated heat sink 3 at the back of a mounting ring 30 be arranged. In 14b is indicated as the mounting ring 30 in an opening of a ceiling element 31 can be arranged.

To change the emission direction can be a hinged connection 32 between the mounting ring 30 and the heat sink 3 be provided. In the 15a and 15b is the downlight at - compared to in the 14a and 14b shown case - changed set radiation direction shown, so with changed setting of the articulated connection 32 , In the 16a and 16b corresponding cross sections are sketched.

Claims (13)

LED luminaire, comprising - an LED module ( 2 ) with at least one LED as illuminant and - a heat sink ( 3 ), the LED module ( 2 ) for dissipating heat that can be generated by the LED thermally with the heat sink ( 3 ), characterized by - means ( 10 . 11 . 16 . 17 ) for tool-free release and restoration of the connection between the LED module ( 2 ) and the heat sink ( 3 ). LED luminaire according to claim 1, in which the means ( 10 . 11 . 16 . 17 ) are adapted to connect by a relative rotational movement and a relative translational movement between the LED module ( 2 ) and the heat sink ( 3 ) to solve and / or restore. LED lamp according to claim 1 or 2, wherein the means ( 10 . 11 . 16 . 17 ) comprise a bayonet lock. LED lamp according to one of the preceding claims, in which the means ( 10 . 11 . 16 . 17 ) comprise a so-called GU10 socket, which is preferably attached to the heat sink ( 3 ) is provided. LED luminaire according to one of the preceding claims, in which the LED module ( 2 ) a module surface ( 6 ) and the heat sink ( 3 ) a heat sink surface ( 7 ) such that in the connected state the module surface ( 6 ) the heat sink surface ( 7 ) contacted flatly. LED luminaire according to one of the preceding claims, in which the LED module ( 2 ) an outer surface ( 14 ), which in the connected state an outer surface of the LED lamp ( 1 ). LED luminaire according to one of the preceding claims, further comprising an optical element ( 4 ), for example a glare tube or a reflector, wherein the optical element ( 4 ) on the LED module ( 2 ) is held without tools from the LED module ( 2 ) can be reversibly solved. LED luminaire according to claim 7, in which the optical element ( 4 ) by means of a latching connection to the LED module ( 2 ) is held. LED luminaire according to one of claims 7 or 8, in which the optical element ( 4 ) pivotable on the LED module ( 2 ) is held. LED lamp according to claim 9, wherein the optical Element opposite the LED module rotated 360 ° can be. LED lamp according to one of the preceding claims, further comprising a lamp operating device ( 25 ), the lamp operating device ( 25 ) preferably via a support arm ( 20 ) with the heat sink ( 3 ) and / or with the LED module ( 2 ) connected is. LED lamp according to one of the preceding claims, wherein the LED light is an LED spotlight. LED lamp according to one of the preceding claims, wherein the LED light is a LED downlight.