Field of the invention

The present invention relates to a light fixture, to an assembly for forming a light fixture, particularly a light fixture intended to be fixed on or in a wall, such as a wall or ceiling of a space in a building.

Background

Light fixtures are typically provided on a wall, such as a ceiling or a wall, in a closed or semi-closed space. Light fixtures are often assembled from different components, wherein a connection is made between an electrical cable, which is typically installed in the wall, and the light source of the light fixture in order to provide power to this light source.

Light fixtures, and particularly LED light fixtures, are generally not modular, or are so to a limited extent, and the different components cannot be individually replaced in simple manner. The coupling between the light fixture and the electrical cable is often difficult to realize, especially when work must be carried out at a height in order to mount the light fixture. Light fixtures typically also have a set appearance.

Summary

The object of embodiments of the invention is to provide an assembly for forming a light fixture which can be installed in simple manner and/or the components of which can be replaced in simple manner, and/or which can be adapted in simple manner to the wishes of the client.

According to a first aspect, an assembly for forming a light fixture on or in a wall, such as a ceiling, is provided. The assembly comprises a tubular housing, a light module and a coupling piece. The tubular housing has a first open end and/or a second open end. The light module comprises a light source and is configured to be inserted into the housing via the first or the second open end of the housing, and to preferably be received at least partially in the housing, and more preferably in the first open end of the housing. The coupling piece is configured to be inserted into the housing via the first or second open end and to preferably be received at least partially in the housing, and more preferably in the second open end of the housing. The coupling piece is configured to be electrically coupled to for instance an electric line, for instance to an electrical cable or track in or on the wall, on one side and to be electrically coupled to the light module on the other. The light module comprises a first electric connecting element and the coupling piece comprises a second electric connecting element. The light module is preferably configured to be coupled, preferably mechanically coupled, to the housing and/or to the coupling piece, wherein an electrical contact between the first and second electric connecting element is simultaneously realized.

By giving the assembly a modular form such that an electrical connection is made while the components are being assembled, an installer can provide the light fixture on a wall, such as a ceiling wall, in rapid and simple manner. The coupling piece can here be fixed to the wall, wherein an electrical cable in the wall is connected to the second electric connecting element. By configuring the light module to be coupled to the housing and/or to the coupling piece, wherein an electrical contact between the first and second electric connecting element is simultaneously realized, the light module can be placed and removed in the light fixture in simple manner. In this way the housing is removable and replaceable in simple manner.

Embodiments are based on the insight that by designing the connecting means between the components of the assembly, particularly the light module, the housing and the coupling piece, such that an electrical connection results between light module and coupling piece and that this electrical connection results simultaneously to the coupling of the light module and coupling piece, the assembly can be installed and repaired in rapid and simple manner if necessary.

The tubular housing can have any cross-section and is dimensioned so that the light module can be inserted via a first open end and so that the coupling piece can be arranged via the second open end, wherein in the housing an electrical contact is realized between the light module and the coupling piece. The tubular housing can for instance have a round or oval or polygonal cross-section, or a combination thereof. The tubular housing can have a constant cross-section, as seen along a central axis of the tubular housing, or can have a variable cross-section. In a possible embodiment the second end has a cross-section which is smaller than the cross-section at the position of the first end. The tubular housing can be formed as an interconnection of a different jacket parts, for instance a first jacket part with a cylindrical outer wall with a first diameter, a second jacket part with a cylindrical outer wall with a second diameter, and an intermediate jacket part connecting the first and second jacket part to each other and for instance having a conical outer wall with a diameter varying from the first to the second diameter. According to another embodiment, the tubular housing has a first jacket part with an outer wall with the form of a prism or truncated pyramid, a second jacket part with a cylindrical outer wall and an intermediate jacket part connecting the first and second jacket part to each other.

The first electric connecting element preferably comprises a first substrate on which at least one first electrically conductive contact element, preferably at least two electrically conductive contact elements, is/are provided and/or the second electric connecting element comprises a second substrate on which at least one second electrically conductive contact element, preferably at least two electrically conductive contact elements, is/are provided. By providing a first and/or second substrate with contact elements the first and/or the second contact element can take a compact and particularly a relatively flat form, whereby the height of the light module and/or of the coupling piece, as measured along a central axis of the housing, can be relatively small.

According to a second aspect, the invention relates to an assembly for forming a light fixture on or in a wall, such as a ceiling. The assembly comprises a housing with an opening, a light module and a coupling piece. The light module comprises a light source and is configured to be inserted into the housing via the opening of the housing. The coupling piece is configured to be electrically coupled to an electric line, for instance to an electrical cable or track in or on the wall, on one side and to be electrically coupled to the light module on the other. The light module comprises a first electric connecting element and the coupling piece comprises a second electric connecting element. The light module is configured to be coupled, preferably mechanically coupled, to the housing and/or to the coupling piece such that an electrical contact between the first and second electric connecting element is realized by the coupling. The first electric connecting element comprises a first substrate on which at least one first electrically conductive contact element, preferably at least two electrically conductive contact elements, is/are provided; and/or the second electric connecting element comprises a second substrate on which at least one second electrically conductive contact element, preferably at least two electrically conductive contact elements, is/are provided.

By providing a first and/or second substrate with contact elements the first and/or the second contact element can take a compact and particularly a relatively flat form, whereby the height of the light module and/or of the coupling piece, as measured in a direction perpendicularly of the wall, can be relatively small. By designing the connection between the components of the assembly, particularly the light module, the housing and the coupling piece, such that an electrical connection results between light module and coupling piece and that this electrical connection results simultaneously to the coupling of the light module and coupling piece, the assembly can be installed and/or repaired in rapid and simple manner.

In embodiments according to the second aspect the housing can take different forms, for instance a tubular housing with a first open end and a second open or substantially closed end. If the second end is closed, the coupling piece can also be inserted via the first open end.

Illustrated below are several advantageous features which can be used in embodiments both according to the first and according to the second aspect. In a possible embodiment the housing is intended to be visible, i.e. to be provided against the wall or at a distance from the wall. In another embodiment the housing can be intended to be built into a wall. The housing can here be built directly into a wall, or the housing can be receivable in a mounting piece which is mounted, for instance seamlessly, in a wall, particularly in a false ceiling. The mounting piece can for instance be tubular, preferably cylindrical, and can optionally be provided with one or more flanges, for instance one peripheral flange, which is/are intended to be fixed in a surface of the wall. The housing can then be configured to be fixed in the mounting piece, for instance by a snap-fit mechanism or by a sealing ring.

The at least one first electrically conductive contact element is preferably provided on a first side of the first substrate, and the light source is preferably provided on a second side of the first substrate.

The at least one first and/or second contact element is preferably one of the following or a combination thereof: a flat electrically conductive element, a spring contact. One of the at least one first and/or second contact element is preferably an electrically conductive element, and the other a spring contact. By designing the at least one first and/or second contact element in this way it is ensured that the electrical connection between the light module and the coupling piece can be realized in simple manner, particularly by bringing the two components into mutual contact during coupling of the light module to the housing and/or the coupling piece.

The housing is preferably tubular and the first and/or the second substrate preferably lies substantially perpendicularly of a central axis of the tubular housing. Configuring the first and second substrate in this way facilitates assembly of the components of the assembly and ensures that the electrical coupling can be realized in simple manner by moving the light module toward the coupling piece in the tubular housing.

In an embodiment one of the at least one first contact element and the at least one second contact element protrudes relative to respectively the first or second substrate, and the other of the at least one first contact element and the at least one second contact element is embodied as a flat electrically conductive element. In this way the protruding element can make good electrical contact with the flat electrically conductive element.

In an embodiment the at least one first contact element and/or the at least one second contact element extends along a circular path. In this way the light module and the coupling piece can be rotated relative to each other without the electrical contact being lost. This circular path can describe a part of a circle or a full circle, depending on the desired freedom of rotation of the light module. If a plurality of contact elements extend along a plurality of circular paths, these paths can have a different diameter and he in a flat plane (as illustrated in Figure 7) or lie in a cylindrical plane at a mutual distance, as seen in the axial direction of the cylindrical plane, wherein the axial direction then preferably corresponds with an axial direction of the housing.

The light module is preferably configured for tool-less coupling to the housing and/or the coupling piece.

The light module is preferably configured to be fixed in the housing or in the coupling piece by rotation. The light module can for instance be provided with an external screw thread and the housing or the coupling piece can be provided with a corresponding internal screw thread. In this way an installer or repair technician can twist the light module into the housing or into the coupling piece in simple manner without the use of tools. According to an alternative, the light module can be configured to be coupled to the housing or to the coupling piece by a bayonet mechanism.

According to another possible embodiment, the light module can be snapped into the housing or into the coupling piece, for instance by means of a snap-fit mechanism.

In an embodiment the housing is manufactured from a thermally conductive material and the light module comprises a housing part of thermally conductive material, wherein the housing part is configured to make thermal contact with the housing in an assembled state of the light module in the housing. By selecting materials with a sufficient thermal conductivity, such as for instance aluminium, a heat transport can be provided between the light module and the surrounding area. In this way the lifespan of the light module and components thereof can be increased. The housing and the housing part are preferably manufactured from a material with a thermal conductivity X greater than 25 W/mK, more preferably greater than 75 W/mK, still more preferably greater than 150 W/mK, most preferably greater than 220 W/mK, measured at 293 K, 1 atm and a relative air humidity of 50%.

The housing part preferably has a first side and an opposite second side, wherein the light source is arranged against the second side.

In an embodiment the light module comprises a light source holder for fixing the light source substrate against the body of the light module, and the first electric connecting element is provided on the light source holder. The first connecting element then preferably protrudes at least partially into an opening of the housing part. The opening is preferably a throughfeed opening extending between the first side and the second side of the housing part. The first connecting element is then for instance a printed circuit board connector element which is fixed to the light source holder and which is electrically connected to contacts of the light source. The second electric connecting element is then preferably received at least partially in the throughfeed opening of the housing part and is there coupled to the first electric connecting element. The second electric connecting element is for instance a printed circuit board connector which can be inserted into the first connecting element. In this way a good electrical connection can be realized in a simple manner.

In an embodiment the light source comprises at least one light-emitting diode, LED, preferably an array of LEDs. An OLED can optionally be used as light source.

In an embodiment a converter is provided in the light module and/or in the coupling piece, which converter is configured to convert a supply voltage, for instance an AC or DC voltage, into one or more current or voltage signals suitable for powering the light source, and preferably for driving the at least one LED. The converter can optionally be configured to receive one or more control signals, such as a dimming signal or a light colour control signal, and to control the current or voltage signal in accordance with the one or more control signals.

If the converter is provided in the light module, three or more contact elements can thus be provided in the first and second connecting element. One or more control signals can hereby be sent to the converter in the light module, for instance in order to dim the light source and/or to control a colour of the emitted light (for instance tunable white).

In an advantageous embodiment the housing, the light module and the coupling piece are substantially cylindrical. In this way the assembly can form a compact whole, wherein the components are preferably couplable to each other by rotation.

In an advantageous embodiment the light module comprises a body of thermally conductive material with a first side on which the first electric connecting element is provided and with a second side against which the light source is provided. The light source is preferably arranged on a light source substrate, such as a PCB, wherein the light source substrate is arranged on the second side of the body of the light module such that the light source substrate is in thermal contact with the body.

In an advantageous embodiment the light module comprises a light source holder for fixing the light source substrate against the body of the light module, wherein the light source holder is provided with two contact elements, preferably two spring contacts, which make contact with two contact elements on said substrate. In this way a good electrical connection to the light source can be realized without soldering steps being necessary in order to realize the connection to the light source substrate.

The body of the light module is preferably provided with one or more passages for electrical wires for connecting the light source to the first electric connecting element. In a possible embodiment the electrical wires are connected to the contact elements of the light source holder.

The light module optionally comprises an optical element, such as a reflector or diffuser, which is configured to optically influence the light emitted by the light source. The optical element is preferably removably fixable in or on the housing. The optical element can for instance be a reflector provided with an external screw thread, and the housing can be provided with a corresponding internal screw thread.

According to a possible embodiment, the coupling piece comprises an electrical connector for receiving an external electric cabling, wherein the electrical connector is electrically connected to the second electric connecting element.

According to a possible embodiment, the coupling piece comprises a base body configured to be fixed in the housing. The base body can for instance be provided with an external screw thread or a bayonet coupling part and the housing can then be provided with a corresponding internal screw thread or a corresponding bayonet coupling part. The second substrate of the second electric connecting element can thus for instance be provided with an integral bayonet coupling part, and the housing can be provided with a bayonet coupling part couplable thereto.

According to a possible embodiment, the coupling piece comprises a hinge with a pivot axis intended to extend substantially parallel to the wall, all this such that the housing with light module is orientable. The hinge can for instance comprise a hinge part which is fixed pivotally on the base body, wherein the hinge part is rotatable round the pivot axis relative to the base body.

In an embodiment the coupling piece comprises an electrical connector which is configured to clampingly receive an external electrical cable and to electrically connect the electrical cable to the second electric connecting element. According to a further aspect, the invention relates to a light fixture comprising an assembly according to any one of the above described embodiments in an assembled state.

According to a further aspect, the invention relates to a light module for use in an assembly according to any one of the above described embodiments.

According to a further aspect, the invention relates to a coupling piece for use in an assembly according to any one of the above described embodiments.

According to a further aspect of the invention, an assembly is provided for forming a fixture on or in a wall, such as a ceiling, wherein the assembly comprises: a housing, preferably a tubular housing; an electrical module configured to be inserted into the housing via an opening of the housing, and to preferably be received at least partially in the housing, preferably in a first open end of the housing; and a coupling piece configured to be received at least partially in the housing, and to preferably be inserted via a second open end of the housing. The coupling piece is configured to be electrically coupled to an electrical cable in the wall on one side and to be electrically coupled to the electrical module on the other. The electrical module comprises a first electric connecting element and the coupling piece comprises a second electric connecting element. The electrical module is configured to be coupled, preferably mechanically coupled, to the housing and/or to the coupling piece such that an electrical contact between the first and second electric connecting element is realized by the coupling. The electrical module can for instance be one of the following or a combination thereof: a camera module, a sensor module such as a smoke detection module or a motion sensor, a sound module, a light module.

Advantageous features described above for the first and second aspect likewise apply to embodiments according to the final aspect of the invention.

Brief description of the figures

The invention will now be further described on the basis of figures of a number of by no means limitative exemplary embodiments, wherein the figures are purely illustrative. Figure 1 shows a cut-away perspective view of an embodiment of an assembly for forming a light fixture.

Figures 2, 3, 5, 6 show perspective detail views of components shown in figure 1. Figure 4 shows a rear view of the coupling piece shown in figure 3 of the assembly of figure 1. Figure 7 shows perspective views of an embodiment of a light module in the assembled state, when looking at the electric connecting element thereof, and of an embodiment of a coupling piece in the assembled state, when looking at the electric connecting element thereof.

Figure 8 shows a cut-away perspective view of an embodiment of a light fixture assembly.

Figure 9 shows a schematic cross-section of an embodiment of a light fixture assembly built into a wall.

Figure 10 shows a schematic cross-section of a further embodiment of a light fixture assembly built into a wall using a mounting piece.

Figure 11 shows a schematic perspective view of an embodiment of a mounting piece.

Figure 12 shows a cut-away perspective view of a further embodiment of an assembly for forming a light fixture.

Brief description of the figures

Figure 1 shows a cut-away perspective view of an assembly 1000 for providing an electrical module 300, typically a light module, on or in a wall W (mount-in or mount-on). The assembly comprises a coupling piece 100, a tubular housing 200 and an electrical module, here a light module 300.

Coupling piece 100 is configured to be connected to the wall. In alternative embodiments the coupling piece is designed to be arranged in a wall opening.

The tubular housing 200 has a first open end 201 and a second open end 2O2.The light module 300 comprises a light source 350 and is configured to be inserted via the open end 201 and to be received at least partially in the first open end 201 of housing 200. The coupling piece 100 is configured to be inserted via the second open end 202 and to be received at least partially in the second open end 202 of the housing. The coupling piece 100 is configured to be electrically coupled to an electrical cable in the wall on one side and to be electrically coupled to the light module 300 on the other.

Tubular housing 200 can have any cross-section and is dimensioned so that the light module can be inserted via a first open end 201 and so that the coupling piece can be inserted via the second open end 202, wherein in housing 200 an electrical contact is realized between the light module and the coupling piece. The tubular housing 200 has a round cross-section here, although the skilled person will appreciate that other forms are also possible. Tubular housing 200 has a variable cross-section here, wherein the second end 202 has a cross-section which is smaller than the cross-section at the position of first end 201. Tubular housing 200 is here formed as an interconnection of a first jacket part with a cylindrical outer wall with a first diameter at the first open end 201, a second jacket part with a cylindrical outer wall with a second diameter at the second open end 202, and an intermediate jacket part connecting the first and second jacket part to each other.

The light module 300 comprises a first electric connecting element 310 and the coupling piece 100 comprises a second electric connecting element 110. Light module 300 is configured to be mechanically coupled to housing 200 and/or to coupling piece 100 such that an electrical contact between the first and second electric connecting element 310, 110 is realized by the mechanical coupling.

The second electric connecting element 110 comprises a substrate 111 on which second electrically conductive contact elements 112, here in the form of spring contacts, are arranged, see also figure 5 and figure 7. The first electric connecting element 310 comprises a substrate 311 on which first electrically conductive contact elements 312, here in the form of flat conductive elements, are arranged, see also figure 4 and figure 7. The second contact elements 112 are intended to make contact with the first electrically conductive contact elements 312 of light module 300.

In the shown embodiment coupling piece 100 comprises a base body 101, the electric connecting element 110, a hinge such that a part of coupling piece 100 is orientable relative to the wall W, and a wall coupling part 117. The hinge comprises a hinge part 115 which is connected pivotally to the base body 101. The base body 101 can for instance be connected pivotally to the hinge part 115 via screws 106 and springs 103. The coupling piece 100 can further be provided with a strain relief plate 113 and screw 105 for improving the pivoting connection between coupling piece 100 and hinge part 115. The wall coupling part 117 is intended to be connected to wall W and the hinge part 115 is connected to wall coupling part 117, preferably in a rotatable manner. The substrate 111 is connected to the base body 101, for instance via screws 104.

In the shown embodiment the housing 200 is provided with screw thread 230, preferably an internal screw thread 230, for co-action with a screw thread 330, preferably an external screw thread 330, of the light module 300. The skilled person will appreciate that various connecting methods are possible between light module 300 and housing 200, for instance using a snap-fit system or a magnet or with a bayonet mechanism.

When designing suitable connecting means for connecting the module 300 to housing 200 it is desirable to provide a good electrical contact between the first electric connecting element 310 and the second connecting element 110 of coupling piece 100 after assembly. It is preferably the case that this connection can be realized during insertion of the light module into the housing 200, so that light module 300 is easily removable, for instance for maintenance or to be replaced with a new light module.

The screw thread 330 of light module 300 and the corresponding screw thread of housing 200 preferably has a minimum height of 0.3 cm, preferably 0.5 cm, still more preferably 0.8 cm, so that the thermal contact between light module 300 and housing 200 would be sufficiently great.

Housing 200 is preferably manufactured from a thermally conductive material, preferably a material with a thermal conductivity X greater than 10 W/mK, more preferably greater than 50 W/mK, still more preferably greater than 100 W/mK, most preferably greater than 200 W/mK, measured at 293 K, 1 atm and a relative air humidity of 50%.

The housing 200 is preferably provided with one or more internal holes 240 which are intended to improve the heat discharge. Cooling of light module 300 is increased in this way, this increasing the lifespan thereof.

The light module 300 comprises a light module body 314 on which the electric connecting element 310 can be secured, for instance via screws 309 which can be received in throughfeed holes 309b of the light module body 314. The light module body 314 is further configured to secure light source 350 thereon.

The body 314 has a first side on which the first electric connecting element 310 is provided and a second side against which the light source 350 is provided. Figure 6 further shows determined components of light module 300 in more detail. The light source 350 is preferably arranged on a light source substrate 355, such as a PCB, wherein the light source substrate 355 is arranged on the second side of body 314 of light module 300 such that the light source substrate 355 is in thermal contact with the body, for instance with interposing a thermally conductive sheet 354.

Light module 300 comprises a light source holder 349 manufactured from an electrically insulating material, such as mica, for fixing the light source substrate 355 against the body 314 of light module 300, wherein the light source holder 349 is provided with two contact elements 351, 352, preferably two spring contacts, which make contact with two contact elements 351a, 352a on said substrate 355. In this way a good electrical connection to light source 350 can be realized without soldering steps being necessary to realize the connection to the light source substrate 355. The light source holder 349 is here an annular plate which fits around the light source 350 and is fixed against the light source substrate 355 using screws 359 which are received in drilled holes 359b. The body 314 of the light module is preferably provided with one or more passages 356 for electrical wires 357, 358 for connecting light source 350 to the first electric connecting element 310. In a possible embodiment the electrical wires 357, 358 are connected to the contact elements 351a, 352a of the light source holder.

Light source 350 preferably comprises an array of LEDs on which a layer of phosphor is optionally arranged. Light source 350 is powered via cabling 357 and 358, which makes contact via spring contacts 351, 352 (not visible) with the electrical contact points 35 la and 352a. Light source 350 can also be configured differently, for instance with one or more OLEDs.

In determined embodiments of the invention the light module is replaced with a different electrical module, for instance a detection module such as a motion sensor, a light sensor, a smoke detector, an alarm module, a camera, a sound module and the like. An electrical module can also combine several functions, for instance a lighting function and a sensor function.

Figure 2 further shows that the base body 101 is provided with a throughfeed hole 120 for throughfeed of electric cabling (not shown), preferably to provide electric cabling between the electrically conductive connecting element 110 and an electrical cable coming from the wall W.

Figure 3 shows a cut-away perspective view of the light module body 314. Light module body 314 is provided with a throughfeed hole 356 for throughfeed of electric cabling (not shown). In this way the light source can be correspondingly connected via the cabling to the contact plates 311b of the first substrate 311.

Figure 4 shows a rear view of the first substrate 311 which comprises flat electrically conductive elements 312 which are arranged in the form of circular paths 312b. This particular design has the advantage that a rotatable connection can be made on one side and an electrical connection on the other between two components, these being the circular tracks 312b and the electrical spring contacts 112 which are arranged on second substrate 111 of coupling piece 100. In this way light module 300 can be in any random rotation position around the central axis of housing 200 and still make good electrical contact.

Figure 5 shows the second substrate 111 in more detail. Four electrically conductive elements 122 are arranged thereon in the form of spring contacts 112. The spring contacts 112 can for instance be substantially U-shaped or V-shaped, wherein one leg of each contact 112 is fixed on the substrate 111. This provides on one hand for a desired electrical conductivity and on the other for a desired mechanical flexibility.

The second substrate 111 is formed along its periphery with coupling parts 100b which are configured to be twisted behind protrusions and/or into recesses of housing 200, for instance in the manner of a bayonet coupling. In this way a simple coupling between coupling piece 100 and housing 200 can be provided.

Figure 7 shows a rear side of light module 300 and a front side of coupling piece 100. Coupling piece 100 comprises coupling parts 100b as described above, although the skilled person will appreciate that other connecting means are also possible for connecting coupling piece 100 to housing 200 and/or light module 300, for instance using a magnet or using screw thread.

In possible embodiments light module 300 is connected directly to coupling piece 100. In other embodiments the light module is coupled to coupling piece 100 via the housing.

The housing 200 is preferably connected removably to coupling piece 100 so that it can be easily replaced, for instance in accordance with the wishes of the architect and/or changing interior design trends.

Figure 8 shows an example of an assembly with coupling piece 100, housing 200 and light module 300. The assembly is further provided with an optical element 360, such as a reflector, which is configured to spread light coming from light source 355. The optical element 360 is preferably removably fixable in or on the housing. Optical element 360 can for instance be a reflector provided with an external screw thread 361, and housing 200 can be provided with a corresponding internal screw thread 361a.

Figure 9 shows an embodiment of an assembly for forming a light fixture in a wall, such as a ceiling. The assembly comprises a housing 200 with an opening 201’, a light module 300 and a coupling piece 100. The housing is here a tubular housing 200 with an open end 201’ and a closed end 202’, although the skilled person will appreciate that the housing can also take other forms. Light module 300 comprises a light source (not shown) and is configured to be received wholly or partially in the housing 200, wherein light module 300 is inserted via opening 201’ of housing 200. Coupling piece 100 is configured to be electrically coupled to an electrical cable K in wall W on one side and to be electrically coupled to light module 300 on the other. The light module 300 comprises a first electric connecting element 310 and the coupling piece 100 comprises a second electric connecting element 110. Light module 300 is configured to be coupled, preferably mechanically coupled, to housing 200 and/or to coupling piece 100 such that an electrical contact between the first and second electric connecting element 110, 310 is realized by the coupling. This coupling can be brought about in any manner, for instance by rotation, wherein light module 300 is provided with an external screw thread and housing 200 is provided with a complimentary internal screw thread. The first electric connecting element 310 comprises a first substrate (not shown, but for instance as described in detail with reference to Figures 1-5), on which at least one first electrically conductive contact element, preferably at least two electrically conductive contact elements, is/are provided. The second electric connecting element 110 comprises a second substrate (not shown, but for instance as described in detail with reference to Figures 1-5), on which at least one second electrically conductive contact element, preferably at least two electrically conductive contact elements, is/are provided.

Figure 10 shows yet another embodiment which is intended to be built into a wall. This embodiment is similar for the most part to the embodiment of Figure 9, with the difference that the assembly comprises a mounting piece 600 which is mounted, for instance seamlessly, in a wall, particularly in a false ceiling. The mounting piece 600 can for instance be tubular, preferably cylindrical, with a jacket 601 and can optionally be provided with one or more flanges 602, for instance one peripheral flange 602 as shown in Figure 11, which is/are intended to be fixed in a surface of the wall W. Housing 200 can then be configured to be fixed in the mounting piece 600, for instance by a snap-fit mechanism and/or by a sealing ring 603.

The skilled person will appreciate that the advantageous features elucidated above for other embodiments can likewise be implemented in the embodiments of Figures 9 and 10.

Figure 12 shows a cut-away perspective view of an assembly 1000 for providing an electrical module 300, typically a light module, on or in a wall W. The assembly comprises a coupling piece 100, a tubular housing 200 and an electrical module, here a light module 300. Coupling piece 100 comprises here a simple electrical connector, such as a printed circuit board connector 110’ which is configured to co-act with a connector element 310’ which is connected to the light source, see below.

The tubular housing 200 has a first open end 201 and a second open end 2O2.Light module 300 comprises a light source 350 and is configured to be inserted via the second open end 202 (or via the first open end 201) and to be received at least partially in housing 200. The coupling piece 100 is configured to be inserted via the second open end 202, here optionally together with light module 300, and to preferably be received at least partially in the second open end 202 of the housing. The coupling piece 100 is configured to be electrically coupled to an electrical cable in the wall on one side and to be electrically coupled to the light module 300 on the other.

The tubular housing 200 can have any cross-section. In housing 200 an electrical contact is realized between light module 300 and coupling piece 100. The light module 300 comprises a first electric connecting element 310’ and the coupling piece 100 comprises a second electric connecting element 110’. Light module 300 is configured to be mechanically coupled to housing 200 and/or to coupling piece 100 such that an electrical contact between the first and second electric connecting element 310’, 110’ is realized by the mechanical coupling.

The second electric connecting element 110’ here takes the form of an electrical connector, for instance a printed circuit board connector, and can for instance comprise two contact elements which are intended to make contact with corresponding electrically conductive contact elements of the first electric connecting element 310’ of light module 300.

Different connecting methods are possible between light module 300 and housing 200, wherein the light module can for instance be connected by rotation and/or translation and/or a fastening means such as a screw. It is preferably the case that this connection is configured such that light module 300 is easily removable, for instance for maintenance or to be replaced with a new light module.

Light module 300 comprises a light module body (also referred to as housing part) 314 manufactured from a thermally conductive material such as aluminium. Body 314 has a first side 314a and a second side 314b against which light source 350 is provided. The light source 350 is preferably arranged on a light source substrate 355, such as a PCB, wherein the light source substrate 355 is arranged on the second side of body 314 of light module 300 such that the light source substrate 355 is in thermal contact with the body, for instance with interposing a thermally conductive sheet 354.

Light module 300 comprises a light source holder 349 manufactured from an electrically insulating material, such as mica, for fixing the light source substrate 355 against the body 314 of light module 300, wherein light source holder 349 is preferably provided with two contact elements which make contact with two contact elements on said substrate 355. In this way a good electrical connection to light source 350 can be realized without soldering steps being necessary to realize the connection to the light source substrate 355. The light source holder 349 is here an annular plate which fits around the light source 350 and is fixed against the light source substrate 355, for instance using bolts or screws 359’ which pass through throughfeed holes 359b’ in body 314 to be tightened into light source holder 349. The first electric connecting element 310’ is provided on the light source holder 349 and preferably protrudes at least partially into an opening 315 of body 314. The second electric connecting element 110’ protrudes at least partially into the opening 315 of body 314 and is there coupled to the first electric connecting element 310’. In this way a compact and simple connection can be realized between light module 300 and electrical wires in a wall, via coupling piece 100.

Body 314 and housing 200 are preferably manufactured from a thermally conductive material, preferably a material with a thermal conductivity X greater than 10 W/mK, more preferably greater than 50 W/mK, still more preferably greater than 100 W/mK, most preferably greater than 200 W/mK, measured at 293 K, 1 atm and a relative air humidity of 50%. Body 314 and housing 200 are configured to make good thermal contact with each other in an assembled state of light module 300 in housing 200. In this way light module 300 can be fixed in the housing in simple manner via the body 314, wherein heat can be discharged from light source 350 to housing 200.

Light source 350 preferably comprises an array of LEDs on which a layer of phosphor is optionally arranged.

In the above embodiment one second electric connecting element 110’ and one first electric connecting element 310’ are provided, although the skilled person will appreciate that two or more first and second such connecting elements 110’, 310’ can also be provided, and that a plurality of corresponding openings 315 can in that case be provided in body 314, or one larger opening. When a light module is configured to provide tunable white light, a first group with one or more LEDs having a first colour temperature and a second group with one or more LEDs having a second colour temperature (differing from the first colour temperature) can be provided, these each being controlled individually, and in that case two first connecting elements 110’ and two second connecting elements 310’ can be provided.

In determined embodiments of the invention the light module is replaced with a different electrical module, for instance a detection module such as a motion sensor, a light sensor, a smoke detector, an alarm module, a camera, a sound module and the like. An electrical module can also combine several functions, for instance a lighting function and a sensor function.

The skilled person will appreciate that determined advantageous features elucidated above for other embodiments can likewise be implemented in the embodiments of Figure 12. The connecting elements 310, 110 in Figure 1 can further also be replaced by connecting elements 310’, 110’, wherein coupling piece 100 then comprises inter aha connecting element 110’ and base body 101. Connecting element 110’ can then optionally protrude partially into a throughfeed opening in base body 101 and there be connected to electrical wires. The skilled person will appreciate that many variants and modifications can be envisaged within the scope of the invention, which is defined solely by the following claims.