LIGHTING ARRANGEMENT AND COUPLING UNIT FOR A LIGHTING ARRANGEMENT

Abstract

A lighting arrangement includes a rail, an indirect lighting module for the provision of indirect lighting, and a coupling unit. The rail is designed for coupling-on or at least partially accommodating a lighting module or a lighting unit and comprises an inner region. Along the rail, a conductor device is provided at least for providing electrical energy for supplying the lighting module or the lighting unit. The coupling unit is coupled to the rail and is arranged to receive electrical energy from the conductor device and to supply the indirect lighting module with electrical energy. The rail comprises a web which is designed as a limit of the inner region. The rail comprises a passage-opening in the region of the web. A contacting section of the coupling unit is passed through the passage-opening in order to bring about an electrical coupling of the indirect lighting module to the coupling unit.

Claims

1. Lighting arrangement (1b; 1b′; 100; 100′), having: a rail (3″; 109) which is designed for coupling-on and/or at least partially accommodating at least one lighting module (11, 11a) or at least one lighting unit (111a, 111b) and comprises an inner region (5; 125) in which, along the rail (3″; 109), a conductor device (6; 126) is provided at least for providing electrical energy for supplying the lighting module (11, 11a) or the lighting unit (111a, 111b); at least one indirect lighting module (40; 140) which is provided for the provision of indirect lighting; and a coupling unit (7″; 108) which can be coupled to the rail (3″; 109) and is arranged at least to receive electrical energy from the conductor device (6; 126) and to supply the indirect lighting module (40; 140) with electrical energy; wherein the rail (3″; 109) comprises a web (3a; 109a) which is designed as a limit to the inner region (5; 125) of the rail (3″; 109) fitted with the conductor device (6; 126), wherein the rail (3″; 109) in the region of the web (3a; 109a) comprises a passage-opening (50; 110) and the coupling unit (7″; 108) comprises a contacting section (7a″; 108a) which can be passed through the passage-opening (50; 110) in order to bring about electrical coupling of the indirect lighting module (40; 140) to the coupling unit (7″; 108).

2. Lighting arrangement as claimed in claim 1, characterised in that the coupling unit (7″; 108) and the indirect lighting module (40; 140) for the electrical coupling are arranged with each other in such a way that the indirect lighting module (40; 140) can be displaced in a longitudinal direction (L; L′) of the rail (3″; 109) relative to the coupling unit (7″; 108) coupled to the rail (3″; 109).

3. Lighting arrangement as claimed in claim 1, characterised in that the coupling unit (7″; 108) comprises contact elements (17a; 128), in particular punctiform contact elements (17a; 128), by cooperation thereof with associated elongated contact elements (47; 147) of the indirect lighting module (40; 140) the—in particular displaceable—electrical coupling to the indirect lighting module (40; 140) can be brought about.

4. Lighting arrangement as claimed in claim 3, characterised in that the indirect lighting module (40; 140) comprises a double-sided printed circuit board (41; 141), wherein the contact elements (47; 147) of the indirect lighting module (40; 140) are designed as tracks on a main surface of the printed circuit board (41; 141).

5. Lighting arrangement as claimed in claim 1, characterised in that the coupling unit (7″; 108) and the indirect lighting module (40; 140) for achieving the electrical coupling thereof are arranged by means of cabling.

6. Lighting arrangement as claimed in claim 1, characterised in that the conductor device (6; 126) is arranged in the inner region (5; 125) of the rail (3″; 109) in such a way that conductors (6a, 6b; 126a, 126b) of the conductor device (6; 126) are located laterally of the coupling unit (7″; 108) when the coupling unit (7″; 108) is inserted into the inner region (5; 125) of the rail (3″; 109).

7. Lighting arrangement as claimed in claim 1, characterised in that the coupling unit (7″; 108) is designed as a connecting unit (108) or as an adapter unit (7″).

8. Lighting arrangement as claimed in claim 1, characterised in that the rail (109) is designed as a low-voltage rail or that the rail (3″) is designed as a high-voltage rail, in particular a mains voltage rail.

9. Lighting arrangement as claimed in claim 1, characterised in that the rail (3″; 109) is provided for suspended attachment thereof, in particular on a ceiling or another part of a building or on another construction.

10. Lighting arrangement as claimed in claim 1, characterised in that the indirect lighting module (40; 140) can be inserted into an accommodating region (44; 144) of the rail (3″; 109) which is formed in a cross-sectional profile of the rail (3″; 109) facing away from the inner region (5; 125).

11. Lighting arrangement as claimed in claim 1, characterised in that the conductor device (6; 126) is further arranged for the provision of a control signal, wherein the coupling unit (7″; 108) is arranged to receive the control signal from the conductor device (6; 126) and to transmit a signal to the indirect lighting module (40; 140) for control thereof and/or to control the indirect lighting module (40; 140), and in particular in that the coupling unit (7″; 108) is arranged to relay the received control signal to the indirect lighting module (140) or is arranged to interpret the received control signal and to control the indirect lighting module (40; 140) on the basis of the received control signal and/or to form a signal to be transmitted to the indirect lighting module (40; 140) and to transmit it to the indirect lighting module (40; 140).

12. Lighting arrangement as claimed in claim 1, characterised in that the control signal provided on the conductor device (6; 126) can be interpreted by the coupling unit (7″) or by the indirect lighting module (140) which is contacted with the coupling unit (108) by means of the contacting section (108a).

13. Lighting arrangement as claimed in claim 1, characterised in that the indirect lighting module (40; 140) is arranged to be electrically coupled to at least one extension indirect lighting module (40a; 140a) in such a way that the extension indirect lighting module (40a; 140a) can be supplied with electrical energy by the indirect lighting module (40; 140) through the coupling unit (7″; 108).

14. Lighting arrangement as claimed in claim 13, characterised in that the indirect lighting module (40; 140) is arranged to be coupled to the extension indirect lighting module (40a; 140a) in such a way that the extension indirect lighting module (40a, 140a) can be controlled via the indirect lighting module (40; 140) corresponding to those control signals by means of which the control of the indirect lighting module (40; 140) is effected.

15. Coupling unit (7″; 8; 108) for a lighting arrangement (1b; 1b′; 1a, 1a′, 1a“; 100; 100′), wherein the coupling unit (7”; 8, 8′; 108) can be inserted into a rail (3″; 9; 109) of the lighting arrangement (1b; 1b′; 1a, 1a′, 1a″; 100; 100′) and can be coupled to the rail (3″; 9; 109); wherein the coupling unit (7″; 8, 8′; 108) comprises a first contact device (1013; 1030; 1130) in order to come into electrically conducting contact with conductors (6a; 26a; 126a) of a conductor device (6; 26; 126) extending along the rail (3″; 9; 109); and wherein the coupling unit (7″; 8, 8′; 108) comprises a contacting section (7a″; 8a, 8a′; 108a) which is designed to be introduced into a passage-opening (50; 10, 10′; 110) in a web (3a; 9a; 109a) of the rail (3″; 9; 109) during insertion of the coupling unit (7″; 8, 8′; 108) into the rail (3″; 9, 109), wherein a second contact device (1017a; 1028; 1128) arranged on the contacting section (7a″; 8a, 8a′; 108a) is provided to come into electrically conducting contact with a contact device (1047; 1027; 1147) of another component (40; 7′; 140) and to electrically couple the coupling unit (7″; 8, 8′; 108) to the other component (40; 7′; 140).

Description

CONTENT OF THE DRAWINGS

[0058] The invention will be explained in more detail hereinafter with the aid of the exemplified embodiments shown in the schematic figures of the drawings. In the drawing:

[0059] FIG. 1 shows a perspective exploded view of a lighting arrangement;

[0060] FIG. 2 shows an exploded view of the arrangement of FIG. 1 from the end face thereof;

[0061] FIG. 3 shows a variant of the lighting arrangement of FIG. 1 in a perspective exploded view from the visible side;

[0062] FIG. 4 shows an adapter unit of the lighting arrangement of FIG. 3 in an enlarged view;

[0063] FIG. 5 shows a lighting arrangement with a coupling unit according to one exemplified embodiment, in a perspective first exploded view from a visible side;

[0064] FIG. 6 shows the lighting arrangement according to FIG. 5 in a perspective second exploded view;

[0065] FIG. 7 shows a lighting arrangement according to one variant of the arrangement of FIGS. 5-6 with a coupling unit according to another exemplified embodiment, in a perspective first exploded view from a visible side;

[0066] FIG. 8 shows the lighting arrangement of FIG. 7 in a perspective second exploded view;

[0067] FIGS. 9-11 show some steps when assembling a lighting arrangement according to the exemplified embodiment of FIG. 7 in an end-face view;

[0068] FIG. 12 shows a coupling unit for use in the variant of FIGS. 7-11;

[0069] FIG. 13 shows a further variant of the arrangement of FIGS. 7-11 according to a further exemplified embodiment;

[0070] FIG. 14 shows some components of a lighting arrangement according to a further exemplified embodiment, in a state partially mounted on one another, in an end-face view;

[0071] FIG. 15 shows the components of FIG. 14 in a state mounted on one another, as seen in perspective from a rear side of the lighting arrangement facing away from the visible side;

[0072] FIG. 16 shows the situation of FIG. 15 in an end-face view;

[0073] FIG. 17 shows some of the components in FIG. 14 in a perspective exploded view from the rear side;

[0074] FIG. 18 shows a variant of the third exemplified embodiment of FIGS. 14-17, illustrated in a similar manner to FIG. 15;

[0075] FIG. 19 shows a lighting arrangement according to a still further exemplified embodiment, as seen partially in an exploded view and partially cut away, from a visible side;

[0076] FIG. 20 shows a coupling or adapter unit of the lighting arrangement of FIG. 19;

[0077] FIG. 21 shows the lighting arrangement of FIG. 19 in a further perspective view, as seen from a rear side;

[0078] FIG. 22 shows a portion of the arrangement of FIG. 19, in a variant according to a still further exemplified embodiment;

[0079] FIG. 23 shows an end-face exploded view of the lighting arrangement of FIG. 19;

[0080] FIG. 24 shows an end-face view of the lighting arrangement of FIG. 19 in the mounted state; and

[0081] FIG. 25 shows an alternative rail.

[0082] The attached drawings are intended to provide improved understanding of the embodiments of the invention. They illustrate embodiments and are used in conjunction with the description to explain principles and concepts of the invention. Other embodiments and many of said advantages will be apparent in view of the drawings. The elements in the drawings are not necessarily illustrated to scale with respect to each other.

[0083] In the figures, like and functionally identical elements, features and components and elements, features and components acting in an identical manner are provided with the same reference signs, unless indicated otherwise.

DESCRIPTION OF EXEMPLIFIED EMBODIMENTS

[0084] FIGS. 1 and 2 show a first lighting arrangement 1. The lighting arrangement 1 is formed having components which are part of a modular rail lighting system. The rail lighting system is designed in such a way that optionally linear lighting modules and/or low-voltage rails and/or spotlights can be accommodated and combined in a rail. Further lighting units can be coupled to the low-voltage rails, which, like the linear lighting modules and spotlights, are preferably used for direct lighting. In addition, the rail lighting system includes the possibility of providing indirect lighting by means of one or more indirect lighting modules in some variants. Advantageously, in this case, not every single insertable illuminating component has to be equipped with a dedicated converter.

[0085] It should be mentioned that the rail can be designed for installation in a ceiling, mounting on a ceiling and/or suspension from the ceiling of a room or from another construction.

[0086] Firstly, a lighting arrangement 1 with direct lighting by means of a linear lighting module 11 will be described. The arrangement 1 has a rail 3 which is open towards the visible side S, in a finished mounted position in particular on the lower side, and has a first inner region 4 as well as a second inner region 5 located in the rail 3 above the first region 4 and arranged further towards a rear side of the rail 3 facing away from the visible side S. On the rear side, in the finished mounted position in particular in an upper region of the rail 3, the second region 5 is closed off by a web 3a, from the opposite ends of which flanges or side walls 3b of the profile 3 extend. Inner longitudinal ribs 3c, 3c′ of the profile 3 delimit the regions 4, 5 from one another, wherein an intermediate space between the longitudinal ribs 3c, 3c′ provides access to the second region 5 from the first region 4. Except for end sections of the longitudinal ribs 3c, 3c′, the rail profile 3 is symmetrical in cross-section in relation to a longitudinal centre plane of the profile 3.

[0087] In the second region 5, conductor rails each with three poles or conductors are arranged on both sides along the rail profile 3 and parallel to the longitudinal direction L thereof and form a conductor device 6 with a total of six conductors 6a, 6b, wherein, of these, four conductors 6a are provided for the provision of electrical energy and two mutually opposing conductors 6b are provided for the provision of control signals. Three of the conductors 6a are preferably each designed as phase conductors to provide three different electrical phases and a fourth one of the conductors 6a is designed as a neutral conductor.

[0088] In one variant, see FIG. 25, the conductor device 6 could alternatively provide in each case e.g. five poles or conductors 6a, 6b on both sides of the second region 5 and thus a total of ten conductors 6a, 6b, in order to be able to additionally switch emergency lights into a separate phase. FIG. 25 illustrates a rail with an alternative conductor device of this type. Again, two conductor rails, and a total of at least two conductors 6b for control signals, are provided in the region 5.

[0089] For example, a DALI-signal for control purposes is provided by means of the conductors 6b. However, a control signal based on other control or dimming methods is likewise feasible.

[0090] In FIGS. 1 and 2, the conductors 6a are thus provided for supplying illuminating components with electrical energy and are supplied with electrical current, preferably alternating current at mains voltage, such as 220-240V, for instance 230V, and a mains frequency of e.g. 50 Hz, by a feed unit which is not shown in greater detail. This will be referred to hereinafter by the term “high voltage”.

[0091] In the rail lighting system and in the arrangement 1, illuminating components are provided which are operated with electrical energy at a substantially lower voltage, for instance at a direct voltage lower than 60V, e.g. 48V. This will be referred to hereinafter as “low voltage”.

[0092] The second region 5 of the rail 3, which is formed as an upper interior space, is designed to accommodate an adapter unit 7, wherein the adapter unit 7 has a converter which converts the high voltage of the conductors 6a into low voltage for supplying the illuminating components, in FIGS. 1, 2 the lighting module 11, and in this case provides the type of current required by the illuminating components at the low voltage. The converter is arranged within the adapter unit 7. Preferably, the adapter unit 7 further comprises a device, not shown in greater detail in the figures, which renders it possible to select the electrical phase of the electrical phases provided by conductors 6a to be used and to couple the lighting unit 11 to the selected phase for power supply with interpositioning of the converter.

[0093] In the installed state, the adapter unit 7 is accommodated for the most part within the second region 5 and has substantially the basic shape of an elongate cuboid with bevelled longitudinal edges on the side thereof facing the web 3a in the installed state. In this case, the adapter unit 7 is thin and space-saving in design. For example, see FIG. 2, a height H7 of the adapter unit 7 can be approximately H7=28 mm and a width B7 of the adapter unit 7 can be approximately B7=14 mm. In particular, the ratio H7/B7 is thus approximately 2. A length of the adapter unit 7, see FIG. 1, can be approximately L7=300 mm. In variants, deviations from these values for H7, B7 and/or L7 are possible, e.g. H7, B7 and/or L7 could each deviate by 2 mm upwards or downwards from said values.

[0094] In the region of longitudinal side surfaces of the adapter unit 7, said adapter unit has a first contact device 1013 with contact elements 13 which can be extended or folded out of the outer surface of the adapter unit 7 in order to make electrically conductive contact with one of the conductors 6a in each case. Contact elements 13 can also be provided for picking up the control signal, e.g. as indicated in FIG. 4 as two middle contact elements 13 of a movable arrangement of six contact elements 13, of which three can each protrude from one of the two longitudinal sides of the adapter unit 7. In this way, the adapter unit 7 can be electrically coupled to the conductor device 6 in order to receive electrical energy as well as control signals from the conductor device 6. The contact elements 13 can be folded out or in by a mechanism which can be actuated by a fitter or operator. In particular, in the case of a ten-pole rail, such as in FIG. 25, the contact device 1013 is not necessarily provided with contact elements 13 for contacting each of the ten conductors 6a, 6b, but nevertheless can be provided with e.g. four or six contact elements 13.

[0095] The adapter unit 7 of FIGS. 1, 2 can be placed freely in the inner region 5 substantially at any point along the rail 3. In addition, the adapter unit 7 inserted into the region 5 can be displaced in the longitudinal direction L when the contact elements 13 are folded in and do not contact the conductors 6a, 6b.

[0096] Furthermore, mechanical engagement elements 14 are provided in the region of the two longitudinal side surfaces of the adapter unit 7, which can also be extended or folded out from the outer surface in order to releasably mechanically secure the adapter unit 7 by engaging behind the inner longitudinal ribs 3c, 3c′ of the rail 3. In addition, further engagement elements can be provided e.g. in the form of latches or clips, which enable temporary, releasable fixing to facilitate mounting.

[0097] In FIGS. 1, 2, the second region 5 is defined towards the first region 4 by the inner longitudinal ribs 3c, 3c′ of the rail 3. These ribs 3c, 3c′ form a type of two-part intermediate wall, in the centre region of which an intermediate space remains along the entire length of the rail profile 3 as a passage for introducing the adapter unit 7. In FIGS. 1, 2, the flanges or side walls 3b of the rail 3 extend downwards beyond the ribs 3c, 3c′, whereby the first region 4 is formed.

[0098] The adapter unit 7 in FIGS. 1, 2 has, on the side facing the visible side S in the installed state, in the figures on the underside, punctiform, pin-like or pin-head-like contact elements 17, some of which serve as “current collectors” for establishing the electrical supply to the lighting module 11, wherein in some variants one or more others of the contact elements 17 can serve to transmit signals for control purposes.

[0099] For the lighting arrangement 1 of FIGS. 1, 2, a lighting assembly 2 is illustrated as the illuminating component and is designed as the linear lighting module 11 for direct lighting.

[0100] The lighting module 11 also has a double-sided printed circuit board (“PCB”) 21 on the upper side thereof in the installed state, on the main surface of which facing outwards strip-like contact elements 18 are formed as tracks and serve for electrical coupling to the adapter unit 7 via the contact elements 17 for the purpose of supplying energy and for control purposes. Arranged on the other main surface of the printed circuit board 21 are light-generating devices which are designed as LEDs. Further electrical and/or electronic devices for operating the LEDs, as well as tracks can likewise be arranged on the printed circuit board 21.

[0101] When assembling the lighting arrangement 1, the adapter unit 7 is initially introduced from below into the second region 5, is electrically coupled to the conductor device 6 by means of the contact elements 13 e.g. with rotation of an actuating element, and e.g. is additionally secured mechanically by means of the elements 14. Then, the lighting module 11 is inserted from below into the first region 4 below the adapter unit 7 and latched or clipped in longitudinal grooves 4a behind further longitudinal ribs of the rail 3 with the aid of latch or clip devices 16.

[0102] The latch devices 16 in addition to corresponding longitudinal ribs and longitudinal grooves 4a are designed in such a way that the assembly 2 can be clipped/latched into the region 4 with only a relatively small force, and likewise can be withdrawn from the rail 3 from below. In this case fixing of the lighting module 11 in the longitudinal direction L is not provided in the arrangement 1. This and the suitable force effect of the latching/clipping devices 16 allow the lighting module 11 to be displaced longitudinally in the longitudinal direction L, whereby position adjustments are possible.

[0103] The reception of current by the lighting module 11 is rendered possible by means of a number of the tracks 18 which are attached to the printed circuit board 21 and which come into electrically conductive contact with in each case an allocated one of the punctiform contact elements 17. In this case, the strip-like contact elements 18 are provided on a side of the assembly 2 facing the adapter unit 7, and extend in the longitudinal direction L of the rail 3 when the assembly 2 is inserted into the first, lower region 4. The lighting module 11 can still be displaced within the rail profile 3 in the longitudinal direction L even after the electrical coupling, and at the same time a power supply is ensured as long as the printed circuit board 21 is located at any position under the collectors 17 of the adapter unit 7.

[0104] The control signal, e.g. a DALI signal or a control signal based on another protocol, is taken from the conductor device by the adapter unit 7, and the lighting module 11 is operated on the basis of this control signal. In the case of the arrangement 1, the control signal can be interpreted by devices in the adapter unit 7, an output signal for actuating the lighting module 11 can be generated and the output signal can be transmitted to the lighting module 11 via one or more of the contact elements 17. Alternatively, provision can be made that the control signal received from the conductor device 6 is relayed by the adapter unit 7 via one or more of the contact elements 17 to the lighting module 11 and is interpreted by devices in the lighting module 11.

[0105] The rail 3 can be formed with a plurality of rail sections which are connected to one another to form a longer linear or angled system of selectable length which can accommodate a multiplicity of illuminating components of the same or different type. If the rail 3 is constructed having a plurality of sections joined together, each with conductor rail sections arranged therein to form the conductor device 6, the conductor rail sections forming the conductor device 6 can be electrically connected in the second region 5, i.e. in the high-voltage region, to intermediate or connecting pieces (not illustrated in the figures) for electrically coupling the corresponding conductors 6a, 6b.

[0106] For example, see FIG. 3, in the case of a lighting arrangement 1′, a first assembly 2 designed as a linear lighting module 11 and one or more further assembly(ies) 12, each likewise designed as a linear lighting module 11a, of which only one is illustrated in FIG. 3, can be provided.

[0107] The end faces of the assemblies 2, 12 are each equipped with connecting devices 15 provided for this purpose in such a way that the assembly 2 can be electrically coupled in each case to one of the further assemblies 12 at both end-face ends thereof. In this manner, the assembly 2 and, thereby, the assembly(ies) 12 are supplied with electrical energy provided by the adapter unit 7, in particular with direct current at low voltage.

[0108] Therefore, in the case of a longer lighting arrangement 1′, not each section of the rail 3 and not each lighting module 11, 11a requires a separate adapter unit in the upper (high-voltage) rail profile inner region 5. In FIG. 3, further lighting modules 11, 11a, e.g. a total of three modules, can be supplied by a common adapter unit 7.

[0109] In addition, the assemblies 2, 12 are controlled and operated according to a master-slave principle. In this case, the assembly 2 directly coupled to the adapter component 7 is considered to be the “master”, to which the further assembly(ies) 12 indirectly coupled to the adapter unit 7 via the assembly 2 and the devices 15 are subordinated as “slave”. The interpretation of the control signal applied to the conductors 6b, for instance as a DALI signal, can be carried out by the adapter unit 7 or the first assembly 2 (“master”), wherein an output signal generated on the basis of the control signal from the adapter unit 7 or the assembly 2 is passed to the “slave” assembly(ies) 12 via the device 15. In both cases, the assemblies 2 and 12, i.e. the lighting modules 11 and 11a, are activated via a common address, e.g. a common DALI address, this address is thus allocated to the adapter 7 or the module 11 and indirectly to the coupled modules 11a. The extension lighting module 11a receives power and control signals corresponding to the first module 11.

[0110] At the same time, the installed assemblies 2, 12 can be displaced together along the rail 3. In an advantageous manner, the adapter component 7 does not have to be released and repositioned in the high-voltage region 5 for this purpose.

[0111] The lighting module 11a of FIG. 3 is similar to the lighting module 11, wherein the printed circuit boards of the second and further lighting modules 11a are not necessarily double-sided but rather can be made single-sided and therefore less expensively. The printed circuit board in the lighting module(s) 11a can render possible the supply of power to, and operation of, the LEDs on the inwardly directed main surface of the printed circuit board, and the supply of power and signals via the device(s) 15.

[0112] In particular, the modules 11, 11a, which are supplied together—directly (“master”) or indirectly (“slave”)—by an adapter 7, are switched in the same electrical phase selected by means of the adapter unit 7 and are supplied thereby.

[0113] FIGS. 5-13 show a lighting arrangement 1a, 1a′ and variants thereof. The arrangement 1a′ of FIG. 5 comprises a rail 3 corresponding to that of FIGS. 1-3. Lighting units 211a and/or 211b drawn by way of example in FIG. 5 are coupled to the rail 3 by means of an assembly 2 with a smaller rail 9.

[0114] The second, smaller rail profile 9 is accommodated in the first region 4. The second, smaller rail 9 is supplied with low voltage by an adapter unit 7′ therebehind in the installed and operational position, and is designed to at least partially accommodate lighting units 211a, 211b-illustrated only schematically—and for coupling thereto. Furthermore, the rail 9 enables the supply of power to the lighting units 211a, 211b, moreover the rail 9 can provide control signals for the lighting units 211a, 211b, wherein the lighting units 211a, 211b are equipped e.g. with suitable devices for electrical coupling, and e.g. furthermore for mechanical coupling, to the rail 9. The lighting units 211a, 211b are preferably displaceably coupled to the rail 9 and are provided in particular for direct lighting.

[0115] Furthermore, according to one exemplified embodiment, the lighting arrangement 1a′ comprises a coupling unit 8′, which is also designated hereinunder as connecting unit 8′, and which renders possible electrical coupling of the rail 9 and the adapter unit 7′. The assembly 2 which can be accommodated in the first region 4 of the rail 3 is formed in this case with the rail 9 and the connecting unit 8′. Provision is preferably made that the assembly 2, in particular the rail 9, can be latched to the rail 3 for mechanical fastening or can be clipped into the rail 3, for which purpose suitably designed means not illustrated in greater detail in the figures can be provided. The mechanical fastening of the assembly 2 formed with the rail 9 and the connecting unit 8′ is configured similarly to the latching or clipping-in of the assembly 2 in the case of the arrangements 1, 1′ such that a displacement of the rail 9 and the connecting unit 8′ in the longitudinal direction L of the rail profile 3 is possible even after the latching or clipping-in. Also in the arrangement 1a′, the latching of the assembly 2 with the rail 3, and the release from this latching, requires relatively little force, whereby the latching and release can be performed easily and quickly.

[0116] The adapter unit 7′ is constructed in the same way as the adapter unit 7 with regard to its basic shape and dimensions, mechanical fixing in the outer rail 3 and electrical coupling to the conductor device 6, and so reference is made to the above explanations in this respect. A converter is arranged in the interior of the adapter unit 7′.

[0117] In contrast to the adapter unit 7, the lower side of the adapter unit 7′, which in the mounted state faces the visible side S, is not equipped with punctiform current collectors for supplying lighting modules. Instead of this, the adapter unit 7′ of FIGS. 5-13, on the underside of the adapter unit 7′, i.e. the side facing the rail 9, when the adapter unit 7′ and the assembly 2 comprising the rail 9 and the connecting unit 8′ are inserted in the rail 3, comprises a contact device 1027 with a plurality of strip-like contact elements 27. The contact elements 27 can each be brought into electrically conductive contact with an allocated contact element 28 of the assembly 2 when the assembly 2 is inserted into the rail 3. When the adapter component 7′ is inserted into the second region 5, the strip-like contact elements 27 extend with the longitudinal direction thereof in parallel with the longitudinal direction L of the rail 3.

[0118] The first low-voltage rail module, which can be inserted under the adapter unit 7′ into the illustrated section of the rail profile 3 and forms the assembly 2, has a passage-opening 10′ on an upper side of the rail 9 in the assembled state, wherein the passage-opening 10′ is incorporated into a web 9a of the rail 9. After inserting the adapter unit 7′ and the assembly 2 into the rail 3, the web 9a faces the adapter unit 7′.

[0119] A contact device of the connecting unit 8′ is formed with the contact elements 28. The plurality of contact elements 28 of FIGS. 5, 6 are arranged on a projection-like contacting section 8a′ of the connecting unit 8′ and designed as punctiform, pin-like or pin-head-like contact elements 28 on the upper side of the contacting section 8a′.

[0120] By introducing the contacting section 8a′ into the passage-opening 10′, the punctiform contacts 28 of the connecting unit 8′ can each be brought into electrical connection to one of the tracks 27 of the adapter 7′ mounted thereabove, in order to electrically couple the assembly 2 to the adapter unit 7′.

[0121] The connector 8′ serves as a coupling unit and consequently ensures the supply to the assembly 2 designed as a low-voltage rail module. In this case, the rail 9 is equipped with a conductor device 26 comprising low-voltage conductors 26a and control signal conductors 26b in the longitudinal direction of the rail 9. A cross-section of the rail 9 is shown in FIG. 9 and is also provided in this form and configuration in the variant of FIGS. 5, 6.

[0122] The low-voltage rail modules 2 are thus equipped to accommodate and supply power to the lighting units 211a, 211b to be operated at low voltage, as well as to supply control signals to the lighting units 211a, 211b on the rail 9.

[0123] In particular, provision is made that the conductors 26a of the conductor device 26 in the inner region of the rail 9 are supplied with electrical energy at low voltage, e.g. a direct voltage of 48V, and with one or more control signals, e.g. a DALI signal, via the adapter unit 7′ and the connecting unit 8′.

[0124] The provision of the electric current at low voltage by means of the adapter unit 7′, starting from the provision of mains voltage via the conductor device 6, is effected by means of a converter of the adapter unit 7′, as described above for the arrangements 1, 1′. The low voltage for the supply of energy to the lighting units 211a, 211b is then relayed to the connecting unit 8′ via e.g. two of the contact elements 27, 28 in each case. It is also possible to select an electrical phase with the aid of the adapter unit 7′, as described above.

[0125] Control signals, for instance a DALI signal, provided at the conductors 6b of the conductor device 6 are relayed in the arrangement 1a′ in unchanged form to the connecting unit 8′ via one or more further corresponding ones of the contact elements 27, 28.

[0126] For example, on both sides of the inner region 9b of the rail 9, one conductor 26a per side can be provided for the power supply and another conductor 26a can be provided for the control. The lighting units 211a, 211b which can be used there can be addressed in particular separately with control signals, for instance via dedicated, separate DALI addresses.

[0127] The connecting unit 8′ is configured to receive the electrical energy and control signals from the adapter unit 7′, and to feed the electrical energy received via contact elements 27, 28 into the conductors 26a of the conductor device 26 of the rail 9, as well as the control signals relayed by the adapter unit 7′ via the further contact elements 27, 28 into the conductors 26b. For this purpose, the connecting unit 8′ comprises a contact device for the electric coupling to the conductor device 26. Furthermore, the connecting unit 8′ can be mechanically latched or clipped to the rail 9 of the assembly 2.

[0128] Variants of the lighting arrangement 1a′ according to further exemplified embodiments are shown in FIGS. 7-13. Apart from the differences described below, the above statements relating to FIGS. 5, 6 also apply to the lighting arrangements 1a, 1a″ of FIGS. 7-13.

[0129] The lighting arrangement 1a of FIGS. 7-12 in turn comprises a rail 3, an adapter unit 7′, and an assembly 2, wherein lighting units e.g. 211a, 211b, are coupled to the rail 3 by means of the assembly 2. With respect to the embodiment of the rail profile 3 and the adapter unit 7′ and the functions thereof, reference is made to the statements above.

[0130] In the variant of FIGS. 7-13, the assembly 2 in turn comprises a second rail 9 with a conductor device 26 which is arranged in the inner region 25 thereof and which is divided into two and arranged on both sides of the inner region 25, see FIG. 9, and a connecting unit 8, shown on a larger scale in FIG. 12.

[0131] The connecting unit 8 in FIGS. 7-13 is of an elongate, box-like external shape and designed to be arranged substantially completely within the inner region 25 of the rail 9 in such a way that the conductors 26a of the conductor device 26 are located laterally of the connecting unit 8, see FIGS. 9-11. A first contact device 1030 comprising contact elements 30, see FIG. 12, is configured to make electrically conductive contact with the conductors 26a, 26b of the conductor device 26 extending along the rail 9 when the connecting unit 8 is inserted into the inner region 25. Elastically resilient latching elements 31 serve to clip the connecting unit 8 into the rail 9 preferably in a releasable manner for mechanical coupling of the components 8 and 9.

[0132] In FIGS. 7-13, the connecting unit 8 likewise has the function of a coupling unit 8 which renders possible the electrical coupling of the rail 9 to the adapter unit 7′ in order to transfer power and control signals. The connecting unit 8 has a contacting section 8a which is introduced into a passage-opening 10 in the web 3a of the rail 3 when the coupling unit 8 is inserted into the rail 9. A second contact device 1028 is provided on the contacting section 8a with—in FIG. 12 by way of example three—punctiform, pin-like or pin-head-like contact elements 28. The contact elements 28 are each designed and arranged to make electrically conductive contact with a corresponding one of the strip-shaped or web-shaped contact elements 27 of the adapter unit 7′.

[0133] In contrast to the plate-like contacting section 8a′ in FIG. 6, in FIGS. 7-13, the contacting section 8a is formed with a relatively small basic surface and protrudes relatively far over the remaining surface of the connecting unit 8, e.g. is of cylinder-like shape and comprises the three contact elements 28. An outer contour of the contacting section 8a corresponds preferably to an inner cross-sectional shape of the passage-opening 10.

[0134] Furthermore, it should be noted that in FIGS. 7-11 and 13 the adapter unit 7′ is provided approximately in the middle in relation to the longitudinal axis thereof, and, on the surface thereof facing towards the web 3a of the rail 3 in the mounted state, is provided with a protrusion 7a′. This can be part of a body and/or housing of the adapter unit 7′ and in further variants can be equipped with contact elements, instead of the contact elements 27, wherein, however, in FIGS. 7-11, 13 contact elements are not present on the protrusion 7a′. The protrusion 7a′ could alternatively be omitted from the adapter unit 7′.

[0135] In one variant of the arrangement 1a, at least one further assembly 12 can be provided, which is supplied, via the assembly 2, with electrical energy and control signals, which are provided by the adapter unit 7′. Such a lighting arrangement 1a″ is illustrated in FIG. 13. Similarly to the assembly 2, the assembly 12 in FIG. 13 has a rail 9, to which one or more lighting unit(s), e.g. 211a, 211b (not shown in FIG. 13), can be coupled and/or at least partially accommodated by the further rail 9. The extension rail 9 of the assembly 12 in FIG. 13 likewise has a conductor device 26 similar to the assembly 2 in FIGS. 5-12. In the region of a joint 1202, the assemblies 2, 12 are coupled to one another in such a manner that the corresponding conductors 26a, 26b of the two rails 9 are each in electrical contact with each other at the adjacent end-face ends thereof. For this purpose, e.g. suitable designed coupling pieces (not shown in greater detail) can be provided at the joints 1202.

[0136] In this way, a plurality of low-voltage rail modules in the form of the assemblies 2, 12 can be inserted into the rail 3 adjoining each other and can be electrically connected. The assembly 12 in FIG. 13 does not comprise a connecting unit 8 or 8′. Therefore, it is sufficient to couple only a first low-voltage rail module, i.e. the assembly 2, to the high-voltage rail 3 electrically via the adapter unit 7′. The low-voltage rail modules 2, 12 are all switched together in the same phase, which can be selected by means of the adapter unit 7′. Electric current for the supply of the lighting units 211a, 211b and control signals are relayed to the coupling point 1202 via the conductors 26a, 26b, whereby lighting units located on the extension rail 9 of the assembly 12 can be controlled individually via dedicated addresses.

[0137] It is apparent from FIG. 13 that the rail 3 can be formed with a plurality of rail profile sections connected to one another at the end face in order to create a longer linear system, such as by means of suitable connecting pieces. Not every section of the rail 3 and not every rail section 9 requires a separate adapter unit 7′ in the upper region 5.

[0138] The arrangements 1a, 1a′, 1a″ each likewise render possible, after the insertion of the adapter unit 7′ and the assembly 2 and, if applicable, of the assembly 12 into the rail 3, a displacement of the assembly 2 or the assemblies 2 and 12, including rails 9 and connecting unit 8 or 8′, relative to the adapter unit 7′.

[0139] FIGS. 14-18 show a lighting arrangement 1b according to one exemplified embodiment and a variant 1b′ thereof, which can be attached in a suspended manner and can be fitted with indirect lighting in addition to the illuminating components for producing direct lighting. The lighting arrangement 1b, 1b′ of FIGS. 14-18 can be suspended e.g. from a ceiling of a room or other part of a building or from another construction. Indirect lighting is implemented in the arrangements 1b and 1b′ in the manner described hereinafter.

[0140] The lighting arrangement 1b, 1b′ comprises a rail 3″ which, similarly to the rail profile 3 in FIGS. 1-3, 5-13, has a region 4 and an inner region 5, the configuration and function of which are described above. However, the rail profile 3″ differs from the rail profile 3 in that in the case of the rail 3″ an accommodating region 44 is additionally provided on a rear side facing away from the visible side S, and thus on the rear side of the web 3a. The accommodating region 44 is formed in the cross-sectional profile of the rail 3″ as a flat channel facing away from the second region 5. The cross-sectional shape of the rail 3″ is substantially symmetrical to a longitudinal centre plane, except for end sections of the longitudinal ribs 3c, 3c′ which are different.

[0141] The accommodating region 44 serves to accommodate an assembly which is designed as an elongated indirect lighting module 40, which can be inserted into the accommodating region 44 and can emit light in the mounted state substantially upwards, e.g. in the direction of the ceiling of the room.

[0142] The rail 3″ in FIGS. 14-18 is equipped with a three-phase, or alternatively a five-phase, conductor device 6 configured for mains voltage, similar to that described above with respect to the rails 3, 3′. The web 3a defines the inner region 5 equipped with the conductor device 6 at the top and thus separates the accommodating region 44 from the inner region 5. In the upwards direction, i.e. to the rear side of the rail 3″ opposite to the visible side S, this is equipped with one or more passage-openings 50, see FIG. 17, in the web 3a.

[0143] Furthermore, an adapter unit 7″ is provided which can be introduced into the rail 3″ in a similar manner to the adapter units 7, 7′ and which is designed in a similar manner to the adapter units 7, 7′ with regard to the basic shape, mechanical fixing and electrical coupling in the region 5, wherein differences are described hereinafter.

[0144] In addition to the first contact device 1013, the adapter unit 7″ has a second contact device 1017a with punctiform contact elements 17a on the top side of the adapter unit 7″. In this case, the contact elements 17a are pin-like or pin-head-like and protrude from an upper surface of a protrusion-like contacting section 7a″ which can be formed substantially like the protrusion 7a′ of FIG. 13. The contacting section 7a″ is arranged on the adapter unit 7″ substantially centrally in relation to the longitudinal extension of said adapter unit and is provided on the top side of the adapter unit 7″ which in the inserted state faces away from the visible side S and faces towards the web 3a.

[0145] The contacting section 7a″ can be introduced into the opening for the electrical coupling of the indirect lighting module 40 and the adapter unit 7″. Thus, the contact elements 17a, see FIG. 14, can protrude through the opening 50 and protrude upwards out of said opening. A body section of the contacting section 7a″ preferably substantially fills the passage-opening 50, whereby said opening is closed after insertion of the adapter unit 7″.

[0146] The adapter unit 7″, like the adapter unit 7, 7′, with selection of a suitable opening 50 or introduction of the opening 50 at the desired longitudinal position, can be positioned fundamentally freely along the rail 3″, but can no longer be displaced longitudinally after insertion of the contacting section 7a″ into the opening 50.

[0147] The first indirect lighting module 40 which can be displaceably inserted thereabove into the rail 3″ has a double-sided printed circuit board 41 (“PCB”) which can be electrically coupled on its underside to the protruding contact elements 17a of the adapter unit 7″ via a contact device 1047 having web-shaped or strip-like contact elements 47. Further indirect lighting modules can each be inserted into the accommodating region 44 as an extension indirect lighting module 40a on the end face adjoining the first indirect lighting module 40 and can be connected to the first indirect lighting module 40 according to a master/slave principle, wherein the indirect lighting module 40 can be considered to be the “master”. The connection can be established by means of connecting devices, not shown in greater detail, at a joint 4040, see FIG. 18. The further indirect lighting modules 40a or “slaves” can have an at least single-sided printed circuit board instead of the double-sided printed circuit board 41, which can contribute to cost savings and simplified manufacturing.

[0148] An electrical supply to the indirect lighting module 40a is effected via the indirect lighting module 40, wherein, e.g. as in the case of the arrangements of FIGS. 1-4, a low voltage for the operation of the indirect lighting modules 40, 40a is provided by the adapter unit 7″ which includes a converter. The electrical phase to be used for the power supply to the indirect lighting modules 40, 40a, with interpositioning of the converter, and provided by the conductor device 6 can also be selected by means of the adapter unit 7″, as described above.

[0149] The control of the indirect lighting modules 40, 40a is made possible in a similar manner as with the direct lighting modules 11, 11a, wherein the indirect lighting modules 40, 40a are addressed via a common address, e.g. a DALI address, and are controlled together. The control signal provided at the conductors 26b of the conductor device 6 is interpreted by devices in the adapter unit 7″ or alternatively by devices on the board 41 of the “master” indirect lighting module 40 and, based thereon, an output signal is generated for the control, wherein the contact device 1017a is designed e.g. for communicating the output signal generated on the basis of the interpretation of the control signal in the adapter unit 7″ or for relaying the control signal received by the adapter unit 7″ from the conductor device 6. In both cases, the output signal resulting from the interpretation is transferred at the joint 4040. The output signal can be converted e.g. by means of a pulse-width modulation or pulse-pause modulation.

[0150] Cumbersome separate cabling of the indirect lighting module 40 at the construction site can be avoided with the aid of the contact devices 1017a, 1047 described above and the cooperation therebetween. A comparatively small passage-opening 50 is introduced into the web 3a in the region of the top side of the rail 3″. The opening 50 can either be pre-produced or flexibly introduced at the desired position at the construction site. The freely placeable adapter 7″ which can initially be displaced with folded-in contact elements 13 is then positioned in the rail 3″ under the recess 50. Indirect lighting modules 40 can then be inserted e.g. quickly, variably and flexibly without much effort. In addition, the indirect lighting module 40, and optionally further indirect lighting modules 40a as “slaves”, can still be displaced in the longitudinal direction L relative to the adapter unit 7″ when an electrical coupling is provided. For example, a further module 40a can be provided at each end of the module 40, wherein an indirect lighting strip of greater length is likewise feasible.

[0151] In the manner described above, the adapter unit 7″ serves as a coupling unit 7″ for coupling the conductor device 6 to the indirect lighting module 40.

[0152] The adapter unit 7″ is configured to supply the indirect module 40 and optionally, in the case of the arrangement 1b′, further indirect modules 40a in the accommodating region 44 as “slaves”. In addition to the adapter unit 7″, in FIGS. 14-18 a further adapter unit 7, which is not visible in FIGS. 15, 17, 18, is accommodated in the inner region 5 of the rail 3″ and is designed as described with reference to FIGS. 1-4. By means of the further adapter unit 7, one or more linear lighting modules 11, 11a can be supplied as assemblies 2, 12 in a similar manner to FIGS. 1-3 in order to also implement direct lighting by means of the lighting arrangement 1b, 1b′, i.e. in particular starting from the visible side S into the room region located therebelow. With such an arrangement 1b, 1b′, continuous direct and indirect lighting strips can be produced e.g. simultaneously and can be displaced separately along the rail 3″.

[0153] FIGS. 14, 16 show the end face of the rail 3″ with, by way of example, two adapter units 7, 7″—of which one is for direct modules and one is for indirect modules—wherein, with the exception of the contact elements 17, only the foremost adapter unit 7″ is visible and conceals the adapter unit 7 arranged therebehind.

[0154] As in the case of the lighting arrangements described above with reference to FIGS. 1-13, in the exemplified embodiment of FIGS. 14-18, the region 4, which is provided for accommodating, at least partially and preferably substantially completely, the assembly(ies) 2, 12, which are configured preferably for direct lighting, is formed as a front-side region 4 of the rail 3″ when the lighting arrangement 1b, 1b′ is in the usage state. The front side of the lighting arrangement 1b or 1b′ corresponds to the visible side S thereof, in particular the underside thereof in a mounted state.

[0155] The accommodating region 44 for accommodating, at least partially, preferably substantially completely, the indirect lighting module 40 as well as optionally the extension indirect lighting module 40a is formed as a rear-side region 44 of the rail 3″. The accommodating region 44 and the inner region 5 are thus arranged on different sides of the web 3a, wherein the inner region 5 is provided between the web 3a and the region 4. The rear-side accommodating region 44 and the inner region 5 are thus adjacent to to one another in the exemplified embodiment of FIGS. 14-18 and in this case are delimited from one another by the web 3a.

[0156] It should be mentioned that the contact devices 1017a, 1047 described above with respect to exemplified embodiments enable simple and quick, displaceable electrical coupling which advantageously requires little effort and time during mounting and is also space-saving.

[0157] However, in one modified variant, the contact devices 1017a, 1047 can be replaced by a cable connection, wherein a sufficient cable length is provided in order to enable the indirect lighting module 40 and optionally the extension indirect lighting module 40a to be displaced relative to the inserted adapter unit 7″. The cable connection can be formed e.g. with a flexible cable which is connected at one end thereof to the contact section 7a″ and at its other end to the indirect lighting module 40 and extends through the opening 50.

[0158] Some possibilities are presented above for constructing a lighting arrangement based on the rail lighting system described above, wherein the different assemblies, lighting modules, lighting units, indirect lighting modules, and rail profiles described above can be combined in many ways in order in each case to meet the lighting requirement in different applications.

[0159] In particular, the indirect lighting module(s) 140, 140a of FIGS. 14-18 can be combined in a versatile manner with the direct lighting modules 11, 11a or lighting units 211a, 211b described with reference to FIGS. 1-13. For example, it is possible in this manner to provide both directly and indirectly illuminating lighting strips which independently of each other in the inserted state have a displaceability with respect to the respectively provided adapter unit 7″ or 7 or 7′.

[0160] As described above, a dedicated adapter unit is not necessary for extension rails 9, see FIG. 13, or extension modules 11a, 40a, see FIGS. 3 and 18.

[0161] However, a specifically provided adapter unit is preferably provided in each case for the differently designed assemblies 2, 12 and for the indirect lighting. For the lighting modules 11, 11a, for the low-voltage rails 9 with lighting units 211a, 211b, and for the indirect lighting by means of the indirect lighting modules 40, 40a, the rail lighting system provides a specifically configured adapter unit 7, 7′, 7″ in each case. In particular with regard to basic shape and dimensions as well as the fastening in the second region 5 and the contacting with the conductor device 6, the adapter units 7, 7′, 7″ are designed substantially similarly.

[0162] Therefore, a first adapter unit 7″ is used preferably e.g. for a lighting arrangement having indirect lighting modules 40, 40a and a second, independent adapter unit 7 e.g. next to the first adapter unit 7″ is used for additional directly illuminating lighting modules 11, 11a in the rail 3″. In order to combine the indirect lighting modules 40, 40a with an assembly 2 with the low-voltage rail 9, a second adapter unit 7′ can be used in addition to the adapter unit 7″. This makes it possible to flexibly combine direct or indirect illuminating components and at the same time the complexity of the adapter units 7, 7′, 7″ in terms of electrical and control technology is limited.

[0163] Furthermore, the rail system can provide an independent adapter unit, not shown in the figures, for spot lamps or spotlights, not shown.

[0164] It is feasible e.g. on the adapter or coupling unit 7″, to simultaneously provide contact elements 17a for supplying an indirect lighting module 40 and contact elements 17 for supplying modules 11, 11a. Similarly, it would be feasible to provide contact elements 17a for an indirect module 40 on the adapter unit 7′. In such a modification, only one adapter unit is required instead of two, although it is constructed in a more complicated manner in terms of electrical and control technology, particularly if direct and indirect lighting are to be controlled independently of one another.

[0165] The adapter units 7, 7″ described above can each be equipped with different numbers of contact elements 17 or 17a. For example, the adapter unit 7 or 7″ could have three or four punctiform contact elements 17 or 17a, wherein a corresponding number of contact elements 18 or 47 can then be provided.

[0166] For example, three pin contacts 17 or 17a, variants and exemplified embodiments can serve to provide the possibility of a so-called “Tunable White”, wherein the pin contacts 17, 17a provide positive and negative current contacts for this purpose. In this case, the contact elements 17, 17a can have the following configuration: first contact element positive (cold); second contact element positive (warm); third contact element negative.

[0167] In one variant, in which the “Tunable White” option is not available, it may be sufficient to provide the adapter units 7, 7″ each with only two contact elements, with the configuration: first contact element positive, second contact element negative.

[0168] Therefore, a rail lighting system is described above which enables combinable accommodation of displaceable spotlights, lighting modules and low-current rails which themselves can accommodate further lighting units, in particular in a displaceable manner, in a three-phase or five-phase rail.

[0169] A lighting arrangement 100 according to a further exemplified embodiment and a variant 100′ thereof are shown in FIGS. 19-24. The lighting arrangement 100 comprises a rail 109, at least one indirect lighting module 140 for providing indirect lighting, and an adapter or coupling unit 108.

[0170] The rail 109 is designed for coupling and/or accommodating, at least partially, one or more lighting units 111a and/or 111b which are illustrated schematically in FIG. 19 and can be of a different type, can be designed e.g. as linear modules 111b or spots 111a.

[0171] The rail 109 has a first region 144 and a second region 125, see the cross-sectional view of FIG. 23. In the inner region 125, the lower one in FIG. 23, a conductor device 126 is provided along the rail 109 for providing at least electrical energy for supplying the lighting unit(s) 111a, 111b. The conductor device 126 extends in parallel with a longitudinal direction L′ of the rail 109. FIGS. 23, 24 show that the conductor device 126 is designed having two conductor rails, each with two conductors 126a, 126b, of which one conductor rail is on each side of the inner region 125 laterally within the same, wherein the conductors 126a serve to provide the electric current and the conductors 126b serve to provide a control signal, for instance a DALI signal, wherein a control signal based on e.g. another protocol or dimming method is likewise feasible. If e.g. a control signal is not desired, the conductor device 6 could alternatively be designed having only one conductor rail on one side, and with a total of two conductors.

[0172] The rail 109 is designed as a low-voltage or low-volt rail, e.g. for supplying energy to the lighting units with a direct voltage of less than 60V, e.g. 48V, which is fed into the conductor device 126 by a feed unit, not shown.

[0173] The adapter unit 108 may also be referred to as a coupling or connecting unit, serves to electrically couple the conductor device 126 to the indirect lighting module 140, can be inserted into the inner region 125 of the rail 109 and can be coupled to the rail 109. When the coupling unit or adapter unit 108 is in the inserted state, the conductors 126a, 126b are arranged laterally of the unit 108.

[0174] The coupling unit or adapter unit 108 shown separately in FIG. 20 has a first contact device 1130 with contact elements 130 arranged on the longitudinal sides of the unit 108. The contact elements 130 are arranged and configured to make electrically conductive contact in each case with one of the conductors 126a, 126b. In addition, the coupling unit 108 has, on the longitudinal sides thereof, elastically resilient latching elements 131, by means of which the unit 108 can be clipped into the rail 109 for mechanical coupling thereof to the rail 109 from the visible side S thereof.

[0175] The adapter unit 108 is thus configured to tap current from the conductors 126a and preferably also control signals from the conductors 126b at the side of the conductor device 126 by means of the contact elements 130, to divert them upwards by 90° and to make them available to the indirect lighting module 140.

[0176] A cross-sectional shape of the rail 109 is formed having a web 109a and side walls or flanges 109b, wherein the web 109a extends between the flanges 109b. The web 109a defines the inner, second region 125 of the rail 109 which is equipped with the conductor device 126.

[0177] The rail 109 is fastened in a suspended manner to form the lighting arrangement 100, e.g. in a building, e.g. by suspending the rail 109 from a ceiling, from another part of the building, or from another construction.

[0178] The first region 144, hereinafter also referred to as the accommodating region 144, is arranged on a rear side of the rail 109 which, in the mounted state, faces away from a visible side S of said rail, and thus on the rear side of the web 3a. The accommodating region 144 is formed in the cross-sectional profile of the rail 109, in particular as an upper part of a channel facing away from the web 109a and the inner region 125. The channel has two sections of different width starting from the opening thereof towards the web 109a and is of smaller width by reason of inwardly protruding, lateral steps towards the web 109a.

[0179] The accommodating region 144 serves to accommodate an assembly designed as an elongated indirect lighting module 140, which can be inserted—in FIGS. 23, 24 from above—into the accommodating region 144. In the mounted state, the indirect lighting module 140 inserted into the first region 144 can emit light upwards, e.g. in the direction of the ceiling of the room.

[0180] In order to supply electrical current and preferably control signals to the indirect lighting module 140, the coupling unit 108 has a contacting section 108a. The rail 109 is provided with a passage-opening 110 in the region of the web 109a, see FIG. 19. When the coupling unit 108 is inserted into the rail 109, the contacting section 109 is inserted into and through the passage-opening 110 such that the upper part of the contacting section 108a passes through the passage-opening 110 to supply electrical current and preferably also control signals to the indirect lighting module 140.

[0181] The indirect lighting module 140 has a double-sided printed circuit board 141. Elongated strip-shaped contact elements 147 of a contact device 1147 of the module 140, which extend in parallel with the longitudinal direction L′ and are designed as tracks, are formed on a main surface of the printed circuit board 141 facing the web 109a in the state in which it is inserted into the accommodating region 144. On the other, opposite main surface, the printed circuit board 141 is provided with light-generating devices which are designed preferably as LEDs.

[0182] A second contact device 1128 is arranged on the contacting section 108a of the adapter unit 108 and has a plurality, in the example shown three, punctiform, pin-shaped or pin-head-like contact elements 128 which protrude from an upper surface of the contacting section 108a in the mounted state, see FIG. 20.

[0183] During insertion of the coupling unit 108, the second contact device 1128, comprising the contact elements 128, makes electrically conductive contact with the contact device 1147 of the indirect lighting module 140, comprising the contact elements 147. In particular, in this case each contact element 128 contacts one of the web-like contact elements 147.

[0184] Complex cabling of the indirect lighting module 140 is not necessary in the described embodiment with the cooperating contact devices 1128, 1147, the electrical coupling of the conductor device 126 to the indirect lighting module 140 is possible in a simple and time-saving manner. The passage-opening 110 which is relatively small in size can be pre-produced in the rail 109 or flexibly inserted on the construction site. Then, the indirect lighting module 140, and optionally further indirect lighting modules 140a, see the variant of FIG. 22, can be inserted quickly, variably and flexibly without much effort.

[0185] In addition, the punctiform contact elements 128 can slide on the web-like contact elements 147 in the contacting state, whereby the indirect lighting module 140 in the inserted state can be displaced relative to the coupling unit or adapter unit 108.

[0186] FIG. 22 illustrates that in a lighting arrangement 100′ according to one variant, the indirect lighting module 140 can form a first indirect lighting module 140 which can be electrically coupled to at least one extension indirect lighting module 140a. For this purpose, the extension indirect lighting module 140a can be inserted into the accommodating region 144 in the same way as the indirect lighting module 140. In this way, a joint 1414 is formed between the modules 140, 140a, which is not yet completely closed in FIG. 22. At the joint 1414, the modules 140 and 140a can be electrically coupled to one another in order to likewise supply electrical energy to the extension indirect lighting module 140a via the indirect lighting module 140 by means of the unit 108.

[0187] The modules 140 and 140a are controlled and operated according to a master-slave operation, wherein the module 140a as “slave” is subordinate to the module 140 as “master”. In other words, the control of the extension indirect lighting module 140a is effected according to those control signals which the first indirect lighting module 140 receives from the adapter unit 108 and according to which the first indirect lighting module 140 is controlled and operated.

[0188] In the case of the exemplified embodiment of FIGS. 19-24, the preferably double-sided printed circuit board 141 (“PCB”) of the first indirect lighting module 140 not only enables the supply of power to the module 140, but also interprets control signals which are relayed via the contact devices 1130, 1128 and 1147 from the conductor device 126 via the coupling unit 108 to the first module 140, and thus enables control, e.g. dimming. Via the end-face coupling with the module 140a, the module 140a (“slave”) is also activated like the module 140. The control signal relayed by the conductors 126b is evaluated by means of devices of the first indirect lighting module 140 (“master”), wherein by means of these devices e.g. an output signal is generated based on the control signal, said output signal being used by the module 140 to control the same and is also relayed at the joint 1414 to the extension module 140a for control thereof. The output signal is e.g. a signal correlating with the dim level, e.g. based on pulse-width modulation or pulse-pause modulation. The modules 140, 140a can thus be controlled via a common address.

[0189] The further extension indirect lighting module(s) 140a can be attached to the module 140 so as to be connectable according to the above-described master/slave principle and therefore do not require a dedicated coupling unit. It is feasible to have at least one extension module 140a at each end of the module 140.

[0190] Reference is made to the fact that in the case of a similarly advantageous variant of the exemplified embodiment of FIGS. 19-24, instead of the contact devices 1147, 1128 a cable connection can be provided similarly as described above for the contact devices 1017a, 1047 of FIG. 17. The cable connection can be formed e.g. with a flexible cable which is connected at one end thereof to the contacting section 108a and at its other end to the indirect lighting module 140 and extends through the opening 110.

[0191] The rails 3, 3′, 3″, 9, 109 can each be extruded e.g. from a metal material, e.g. an aluminium material. Rails made from aluminium material can be processed satisfactorily locally by fitters at the construction site using relatively simple means.

[0192] Although the invention has been described in full above with the aid of preferred exemplified embodiments, it is not limited thereto but can be modified in diverse ways.

LIST OF REFERENCE SIGNS

[0193] 1, 1′ lighting arrangement [0194] 1a, 1a′, 1a″ lighting arrangement [0195] 1, 1b′ lighting arrangement [0196] 2 assembly [0197] 3, 3″ rail [0198] 3a web [0199] 3b flange [0200] 3c, 3c′ longitudinal rib [0201] 4 first region [0202] 4a recess [0203] 5 second region [0204] 6 conductor device [0205] 6a, 6b conductor [0206] 7, 7′, 7″ adapter unit, coupling unit [0207] 7a′ protrusion [0208] 7a″ contacting section [0209] 8, 8′ connecting unit, coupling unit [0210] 8a, 8a′ contacting section [0211] 9 rail [0212] 9a web [0213] 9b inner region [0214] 10, 10′ passage-opening [0215] 11 lighting module [0216] 11a further lighting module [0217] 12 further assembly [0218] 1202 joint [0219] 13 contact element [0220] 14 engagement element [0221] 15 device [0222] 16 latching device [0223] 17, 17a, 18 contact element [0224] 21 double-sided printed circuit board [0225] 25 inner region [0226] 26 conductor device [0227] 26a, 26b conductor [0228] 27, 28, 30 contact element [0229] 31 latching element [0230] 40 indirect lighting module [0231] 40a extension indirect lighting module [0232] 4040 joint [0233] 41 printed circuit board [0234] 44 accommodating region [0235] 47 contact element [0236] 50 passage opening [0237] 100, 100′ lighting arrangement [0238] 108 adapter unit or coupling unit [0239] 108a contacting section [0240] 109 rail [0241] 109a web [0242] 109b flange [0243] 110 passage opening [0244] 111a, 111b lighting unit [0245] 125 inner region [0246] 126 conductor device [0247] 126a, 126b conductor [0248] 128, 130 contact element [0249] 131 latching element [0250] 140 indirect lighting module [0251] 141 printed circuit board [0252] 144 accommodating region [0253] 147 contact element [0254] 140a extension indirect lighting module [0255] 1414 joint [0256] 211a, 211b lighting unit [0257] L, L′ longitudinal direction [0258] S visible side