EP2827052B1 - Lamp - Google Patents

Description

The present invention relates to a rectilinear and oblong luminaire, with the features of the preamble of claim 1.

Such a luminaire is suitable, for example, for the realization of a light band, for which purpose a plurality of such luminaires are arranged one behind the other in their longitudinal direction. Such a lamp includes this purpose a straight and elongated support profile for wall or ceiling mounting and a straight and elongated equipment carrier which is releasably secured to the support section. At least one electrical load can be attached to the device carrier. This is preferably a lamp or a lighting device.

A "rectilinear body" in the present context is a body whose longitudinal central axis extends coaxially to a straight line. An "elongated body" in the present context is a body whose length measured in a longitudinal axis of the body is greater than a width and height measured transversely to the longitudinal axis of the body. In particular, an elongate body is at least twice, but preferably at least ten times, longer than wide and high.

In such elongated lights often fluorescent tubes are used as a lamp. In order to save electrical energy, LED-based lighting devices are also increasingly being used, with LEDs representing light-emitting diodes. In the present context, LEDs also mean OLEDs, where OLED stands for organic LED. LEDs are characterized by a high light output with comparatively low power consumption. A corresponding lighting device comprises a plurality of LEDs on at least one circuit board. For holding the respective board, the respective lighting device may then have a straight and elongated mounting rail. A light with such a lighting device is for example from the DE 10 2012 206 070 A1 known.

While fluorescent tubes have no preferred light emission direction, a lighting device, on whose supporting body a printed circuit board with a plurality of LEDs is arranged, has a preferred light emission direction. In order to adjust the light emission direction of the respective lighting device relative to the equipment carrier or relative to the support profile, the respective lighting device can be attached by means of at least one holder about a pivot axis pivotally mounted on the equipment carrier. The realization of such a holder is comparatively complicated. In particular, in connection with the creation of an electrical connection between the lighting device and an arranged on the equipment carrier power electronics can be relatively complex.

A generic light is basically from the DE 690 22 913 T2 known. It comprises a holder with which a lighting device is held pivotably about a pivot axis on a device carrier. This holder is realized by means of at least four separate holding parts. Two first holding parts are attached directly to the lighting device, a second holding part is pivotally mounted about said pivot axis on the first holding part, a third holding part is directly attached to the second holding part and a fourth holding part is on the one hand directly to the third holding part and on the other hand attached to the equipment carrier.

Other lights with multi-part brackets are from the US 2005/002182 A1 and from the DE 34 37 667 A1 known.

The present invention is concerned with the problem of providing for a luminaire of the type mentioned an improved embodiment, which characterized in particular by a simplified structure that allows a comparatively simple installation of the lamp.

This problem is solved according to the invention by the subject matter of the independent claim. Advantageous embodiments are the subject of the dependent claims.

The invention is based on the general idea of realizing the respective holder with at least four separate holding parts, which can be attached to one another relatively simply, in particular without tools, in order to form the holder. In this case, an electrification of the lamp is passed through such a holder, so integrated into this structurally. If the respective lighting device is fastened with more than one such holder on the equipment carrier, it is of course sufficient to pass the electrification of the respective lighting device only by one of these brackets.

By using multiple, easily fastened together holding parts, the holder can be mounted easily, preferably without the use of tools. For example, the holding parts to be fixed to each other can be locked together or clipped together. Also, electrical contacts can be easily integrated into such pluggable connections, so that even here a simple assembly is possible.

In detail, the invention proposes for the realization of the respective holder, to attach at least a first holding part to a rear side of the respective support rail, wherein the respective first holding part is pivotally mounted on a second part about the pivot axis. Furthermore, the respective holder comprises a third holding part, which is arranged on the second holding part and has the electrical plug contacts, which are quasi through the second holding part through electrically connected to at least one lamp of the lighting device. A fourth Holding part of each bracket is then attached to the equipment rack. Furthermore, the fourth holding part is attached to the second holding part and has electrical mating plug contacts, which are designed to be complementary to the plug contacts of the third holding part and electrically contacted with the latter and which are electrically connected to a power supply, in particular to a power electronics of the light. By this construction, the connection of the respective holder to the lighting device via the at least one first holding part. The connection to the equipment carrier via the fourth holding part. The pivotable mounting for the realization of the pivot axis takes place between the respective first holding part and the second holding part. The electrical connection between the lighting device and arranged for example on the equipment rack power supply via an electrical plug connection between the third holding part and the fourth holding part. The mechanical connection between the respective lighting device and the device carrier takes place within the holder between the fourth holding part and the second holding part. Thus, different functions are assigned to the different holding parts, wherein this division of the functions is targeted so that the assembly is particularly easy to implement.

In the luminaire according to the invention, the fourth holding part is fastened through the third holding part to the second holding part. As a result, the third holding part can be fixed by positive locking between the fourth holding part and the second holding part. Furthermore, this makes it possible to realize the third holding part with reduced rigidity and thus easier and cheaper, since the holding function is mainly provided by the second holding part.

According to an advantageous embodiment, the respective first holding part may be held by a latching on the second holding part, which allows a pivotal adjustment about the pivot axis between the first holding part and the second holding part in a plurality of latching steps, each having a predetermined pivoting angle assigned. The realization of such detent stages allows for a setting of predetermined radiation angle for the respective lighting device. On the other hand, the latching steps cause that each set radiation direction is maintained comparatively easy without additional fixing measures for setting the set orientation between the lighting device and equipment carrier are required.

According to an advantageous development, the respective first holding part may have a ring. The second holding part may have a pin for the respective first holding part, on which the respective ring is fitted axially, whereby the pivot axis of the holder is defined. The above gearing between the first and second holding part can basically be formed at any point. However, an integration of this latching in the ring and / or in the pin is particularly advantageous. In this case, according to an advantageous development, it may be provided that the respective first holding part has a ring which has internal teeth on its inner circumference. The second holding part may have a pin for the respective first holding part, on which the respective ring is fitted axially and which has on its outer periphery an external toothing, which cooperates with the respective internal toothing for forming the latching steps. The respective internal toothing can have at least one internal tooth. The respective outer toothing can have at least one outer tooth. To realize a plurality of latching steps, at least one of the teeth has a plurality of teeth. Preferably, the internal toothing has a plurality of inner teeth, while the outer toothing has only one external tooth for each direction of rotation in the simplest case.

At least one such pin may be hollow and in particular define a passage for passing electrical cables, whereby electrical cables from the respective lighting means can be guided into the second holding part through the pin.

In another advantageous development, the respective ring can have a spring region distal to the mounting rail, which allows an elastic widening of the ring against a restoring force. On the one hand, this measure enables comparatively smooth pivoting for setting different emission angles between lighting device and equipment carrier. On the other hand, a sufficient holding force is created which sufficiently fixes the respectively set orientation, in order to avoid an undesired, automatic adjustment. For example, the spring area by a U-shaped Be formed spring clip, which connects two ring segments of the ring together.

In another embodiment, the mounting rail may have on its rear side an axial guide, in which the respective first holding part is axially inserted with a foot and which defines the respective first holding part transversely to the axial direction of the mounting rail. As a result, the respective first holding part can be attached particularly easily to the mounting rail. For example, the respective axial guide can be configured on the respective longitudinal side of the foot of the associated first holding part in the manner of a tongue and groove guide. For this purpose, the respective foot may each have on its longitudinal sides a laterally protruding projection, which laterally engages in a corresponding longitudinal groove of the mounting rail. As soon as the desired axial position along the carrier rail is found for the respective holder, the respective first holder part can optionally be fixed to the carrier rail with the aid of a separate fastening element. For example, a screw or a grooved pin define the respective foot on the support rail.

In another embodiment, electrical cables, each of which is electrically connected by an electrical insulator electrical conductors are electrically connected to the at least one light source, guided into a contact region of the second holding member and positioned therein with positioning. For example, the cables can, as mentioned above, pass through one of the pins into the second holding part. Conveniently, the plug contacts of the third holding part or metallic contact elements contained therein can now be configured as cutting contacts on their end facing the second holding part, which penetrate the respective insulation of the cables when the third holding part is attached to the second holding part in the contact area and contact the respective electrical conductor directly , This design can be a complex Stripping the cable omitted in a provided for contacting with the plug contacts of the third holding part section, since the cutting contacts when attaching the third holding part on the second holding part penetrate the respective insulation automatically to the desired direct contact between the plug contacts or their contact elements and the electrical conductors manufacture.

In another embodiment, the third holding part may be locked to the second holding part. Thus, the second holding part and third holding part can be particularly easily and without tools set together.

The same can also apply to the fourth holding part and the second holding part, so that also here by means of a locking results in an easily produced connection.

In another embodiment, the third holding part may be arranged between the second holding part and the fourth holding part in a fastening direction in which the fourth holding part is attached to the second holding part. In this way, the third holding part is installed between the second holding part and the fourth holding part. Since the second holding part is fastened to the fourth holding part, this can also automatically fix the third holding part within the holder, between the second holding part and the fourth holding part.

According to a particularly advantageous development, the fourth holding part may comprise at least one latching hook, which penetrates a passage opening of the third holding part and which engages with a latching opening of the second holding part. In this way, the third holding part is securely and reliably fixed when locking the fourth holding part on the second holding part.

In a further embodiment, the fourth holding part may be latched to the device carrier. Thus, a particularly easy to produce connection between the equipment carrier and holder can also be realized here.

In a further development, the fourth holding part may have a voltage applied to a front of the device carrier plate, starting from the mating plug having Stecksteck range protrudes through a plug opening of the device carrier and is latched with at least one latching element formed on the plug-in area with the insertion opening. As a result, a sufficiently firm fixation between fourth holding part and equipment carrier can already be realized. The plate of the fourth holding part ensures a surface contact between the fourth holding part and the device carrier.

In an advantageous development, it may be provided that at least one latching lug, which penetrates a latching opening of the device carrier and is latched therewith, on the plate also extends distally to the plug-in region. By virtue of this additional connection between the fourth holding part and the device carrier, moments between the fourth holding part and the device carrier can also be supported, which additionally stabilizes the fixation between the fourth holding part and the device carrier.

In another advantageous embodiment, the respective lighting means may be formed by a plurality of LEDs arranged on a rectilinear and oblong circuit board. In the case of several light sources, accordingly, a plurality of such boards can also be arranged on the mounting rail. The device carrier has on its rear side, that is to say in an interior of the carrier profile, power electronics for supplying the respective lighting device with electrical energy, which is connected to a power supply in the mounted state of the luminaire. The power electronics include, for example, a power supply. The power electronics thus forms the power supply of the respective bulb. The mating plug contacts of the fourth holding part are electrically connected to said power electronics. For this purpose, the mating plug contacts on a side remote from the lighting device side slots have, in which stripped ends of cables can be inserted, which lead to the power electronics.

According to another advantageous embodiment it can be provided that two lighting devices are arranged side by side on the equipment carrier, which are each independently pivotable about a separate pivot axis, wherein the respective holder for the two lighting devices each at least a separate first holding part, a common second holding part, a has common third holding part and a common fourth holding part.

Other important features and advantages of the invention will become apparent from the dependent claims, from the drawings and from the associated figure description with reference to the drawings.

It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination given, but also in other combinations or in isolation, without departing from the scope of the present invention.

Preferred embodiments of the invention are illustrated in the drawings and will be described in more detail in the following description, wherein like reference numerals refer to the same or similar or functionally identical components.

Fig. 1

eine isometrische Ansicht eines Endabschnitts einer Leuchte bei einer ein flammigen Ausführungsform,

Fig. 2

eine isometrische Ansicht der Leuchte im Bereich einer Halterung,

Fig. 3

eine isometrische, auseinander gezogene Ansicht der Leuchte im Bereich der Halterung,

Fig. 4

eine isometrische Ansicht einer Leuchteinrichtung im Bereich eines Teils der Halterung,

Fig. 5

eine isometrische Ansicht eines Geräteträgers im Bereich eines Teils der Halterung,

Fig. 6

eine isometrische Ansicht eines vierten Halteteils der Halterung,

Fig. 7

eine isometrische, auseinander gezogene Ansicht einer Tragschiene und eines Teils der Halterung,

Fig. 8

eine isometrische Ansicht eines ersten Halteteils der Halterung,

Fig. 9

einen Querschnitt der Leuchte bei einer zweiflammigen Ausführungsform.

Show, in each case schematically,

Fig. 1

an isometric view of an end portion of a lamp in a flame-retardant embodiment,

Fig. 2

an isometric view of the luminaire in the region of a holder,

Fig. 3

an isometric, exploded view of the lamp in the region of the holder,

Fig. 4

an isometric view of a lighting device in the region of a part of the holder,

Fig. 5

an isometric view of a device carrier in the region of a part of the holder,

Fig. 6

an isometric view of a fourth holding part of the holder,

Fig. 7

an isometric, exploded view of a mounting rail and a part of the holder,

Fig. 8

an isometric view of a first holding part of the holder,

Fig. 9

a cross section of the lamp in a two-lamp embodiment.

Corresponding FIG. 1 For example, a rectilinear and oblong luminaire 1 comprises a straight and elongated supporting profile 2, a straight and elongate device carrier 3 and at least one straight and oblong lighting device 4, which may also be referred to as a lamp. FIG. 1 shows a single-lamp 1, in which only such a lighting device 4 is arranged on the equipment carrier 3. In difference to show FIG. 9 a two-lamp lamp 1, in which the device carrier 3, two such lighting devices 4 are arranged side by side.

The support profile 2 is used for mounting the lamp 1 on a wall or ceiling. The device carrier 3 carries at least one electrical load, namely at least the lighting device 4. The device carrier 3 is releasably secured to the support section 2. For example, the device carrier 3 may be locked to the support section 2. In particular, outwardly directed sections of longitudinal side edges of the equipment carrier 3 can cooperate with inwardly directed longitudinal side edges of the support profile 2 to form over the entire length of the support section 2 and the device carrier 3, a lateral latching 5, which can optionally also fulfill a sealing function. With the help of a locking device 6 can also create a lock between the device carrier 3 and support section 2.

The respective lighting device 4 has a straight and elongated support rail 7 and is secured by means of at least one holder 8 about a pivot axis 9 pivotally mounted on the equipment carrier 3. The pivot axis 9 extends parallel to the longitudinal axes of the lamp 1, the support section 2, the device carrier 3 and the lighting device 4. In this case, the pivot axis 9 extends between the equipment carrier 3 and the lighting device 4 through the holder 8 therethrough. The respective lighting device 4 has at least one electrical illuminant 10 on a front side of the associated support rail 7 facing away from the device support 3. In the preferred embodiments shown here, the respective luminous means 10 is formed by a printed circuit board, which is also referred to below as 10 and which carries a multiplicity of LEDs 11. The LEDs 11 are preferably arranged along a rectilinear row on the circuit board 10. In principle, the lighting device 4 can be equipped with a single such board 10. It is also possible at the lighting device 4 to arrange several such boards 10, preferably in the longitudinal direction one behind the other.

Although only a single holder 8 for holding the respective lighting device 4 on the equipment carrier 3 can be seen in the embodiments shown here, at least two such holders 8 are expediently used to pivot the respective lighting device 4 on the equipment carrier 3. Hereinafter, referring to the FIGS. 2 to 8 the structure of such a holder 8 explained in more detail.

Accordingly, at least one such holder 8 comprises at least one first holding part 12, which is fastened to a rear side of the respective support rail 7. Preferably, the holder 8 per support rail 7 comprises two such first holding parts 12. Further, the respective holder 8 has a second holding part 13, on which the respective first holding part 12 is pivotally mounted about the pivot axis 9. The holder 8 has an in FIG. 4 recognizable third holding part 14 which is arranged on the second holding part 13 and the electrical plug contacts 15 which are electrically connected through the second holding part 13 with the respective board 10. If the lighting device 4 has a plurality of circuit boards 10, these are electrically connected to each other, so that ultimately only one board 10 must be connected to the plug contacts 15 of the third holding part 14. This connection takes place expediently via electrical cable 16, at least in FIG. 4 are indicated.

The respective holder 8 has according to the Figures 2 . 3 . 5 and 6 In addition, a fourth holding part 17 which is fixed to the equipment carrier 3 and which is secured to the second holding part 13. The fourth holding part 17 has according to FIG. 3 electrical mating plug contacts 18, which are designed to be complementary to the plug contacts 15 of the third holding part 14 and in the assembled state with these Plug contacts 15 are contacted. Corresponding FIG. 5 For example, the mating plug contacts 18 of the fourth holding part 17 are electrically connected to a power supply 20 via cable 19, which is formed here by power electronics which serve for operating the boards 10 or the LEDs 11 and which is also designated 20 below.

The respective first holding part 12 is held on the second holding part 13 via a catch 21, the catch 21 permitting pivotal adjustment about the pivot axis 9 between the first holding part 12 and the second holding part 13 by a plurality of latching steps. In this case, each latching step is associated with a predetermined pivoting angle between the lighting device 4 and the device carrier 3. How in particular the FIGS. 7 and 8th can be seen, the respective first holding part 12 has a ring 22 which has an internal toothing 23 on its inner circumference. The second holding part 13 has according to the FIGS. 4 and 7 for the respective first holding part 12 each have a pin 24, on which the respective ring 22 is plugged axially and thus locked. The respective pin 24 has on its outer periphery an external toothing 25 which cooperates with the respective internal toothing 23 for forming the latching steps. In the example, the internal teeth 23 of the ring 22 has a plurality of inwardly projecting internal teeth. The external toothing 25 has at least one external tooth for each direction of rotation. At least three or four different, predetermined locking positions or pivoting angles are expediently defined for each direction of rotation. For example, in an initial state, a pivoting angle of 0 ° is set, in which the respective lighting device 4 radiates substantially perpendicular to the device carrier 3. Starting from this initial position, for example, pivoting angles of 15 °, 30 ° and 45 ° are adjustable for each direction of rotation. Overall, this results in seven click stops.

How, in particular FIG. 8 can be removed, the respective ring 22 may have on a side remote from the support rail 7 side a spring portion 26 which is designed here as a U-shaped bow spring. The spring portion 26 is designed such that it allows an elastic expansion of the ring 22 against a restoring force. For example, the ring 22 can expand so that its circumference increases. As a result, the frictional connection between the inner toothing 23 and the outer toothing 25 is relieved, whereby a pivoting between the lighting device 4 and the device carrier 3 is simplified. The restoring force of the spring region 26, however, causes the respective pivoting position to be maintained sufficiently reliably, so that an automatic pivoting of the lighting device 4 relative to the device carrier 3 can be largely avoided.

How in particular the FIGS. 4 and 7 can be removed, the support rail 7 on its the device carrier 3 facing the back of an axial guide 27, into which the respective first holding part 12 according to a in FIG. 7 indicated arrow 28 each with a foot 29 in the mounting rail 7 can be inserted. The respective foot 29 can according to the FIGS. 7 and 8th have laterally projecting projections 30 which engage in each case in a lateral longitudinal groove 31 of the support rail 7. The axial guide 27 thereby acts on each side of the respective first holding part 12 in the manner of a tongue and groove guide. The axial guide 27 also ensures that the respective first holding part 12 is held on the support rail 7 transversely to the longitudinal direction of the support rail 7. How the FIGS. 4 and 7 can be, the respective first holding part 12 in the region of the foot 29 have a through hole 32 through which a pin-shaped fastening element for fixing the respective first holding part 12 to the support rail 7 can be performed. For example, the respective first holding part 12 can be screwed or pinned to the mounting rail 7.

In the FIG. 4 recognizable cables 16 which lead to the respective board 10 are formed in the usual way by means of an electrical conductor, for example a copper wire, which is enveloped in the usual way by an electrical insulator made of plastic. The cables 16 are here passed through the pin 24 and guided into the interior of the second holding part 13. In this case, the cables 16 are positioned in the second holding part 13 in a contact region 33, wherein corresponding positioning means are used. Such positioning means are, for example, integrally formed on the second holding part 13 terminals. The plug contacts 15 of the third holding part 14 contain metallic contact elements. These can now be configured in each case at its second holding part 13 end facing as a cutting contact. When attaching the third holding part 14 on the second holding part 13 of the respective cutting contact in the aforementioned contact area 33 can penetrate the respective insulation of the respective cable 16 and directly contact the respective electrical conductor of the cable 16. On a separate stripping of the respective conductor 16 can thus be dispensed with. Expediently, the third holding part 14 can latch with the second holding part 13. By inserting the third holding part 14 into the second holding part 13, the cables 16 coming from the lighting device 4 are thus automatically electrically connected to the plug contacts 15 of the third holding part 14. The latching causes a secure fixation of the third holding part 14 on the second holding part 13.

Also between the fourth holding part 17 and the second holding part 13, a locking is provided. In the Figures 2 and 3 are corresponding, formed on the fourth holding part 17 latch hook 34 recognizable, which cooperate with the second holding part 13 formed locking openings 35. How, in particular FIG. 4 can be seen, the third holding part 14 is almost completely inserted into the second holding part 13. As a result, the third holding part 14 in an in FIG. 3 indicated by an arrow fastening direction 36 between the second holding part 13 and the fourth holding part 17 is arranged. The latching between the fourth holding part 17 and the second holding part 13 realized with the aid of the latching hooks 34 and the latching openings 35 is configured so that the latching hooks 34 each have a latching hook formed in the third holding part 14 FIG. 4 recognizable through opening 37 enforce to lock with the associated latching opening 35 of the second holding part 13. In the region of the second holding part 13 results from the inserted therein, complementarily shaped third holding part 14 an intensive stiffening of the second holding part 13, whereby the latch receives increased strength.

How in particular the Figures 3 . 5 and 6 can be removed, the fourth holding member 17 is suitably locked to the device carrier 3. For this purpose, the fourth holding part 17 may have a plate 39 which adjoins a front side 38 of the equipment carrier 3 facing away from the supporting profile 2. From this plate 39 is a plug-in area 40, which has the mating plug contacts 18. The plug-in area 40 protrudes through a plug-in opening 41 of the device carrier 3 in the mounted state. At the plug-in area 40, a latching element 42 is formed on each of two sides facing away from each other, which engage with the plug-in opening 41. According to the Figures 5 and 6 is at the plate 39 also spaced from the plug portion 40 at least one locking lug 43 is formed according to FIG. 5 a detent opening 44 of the device carrier 3 penetrates and thus locked. This results in an intensive connection of the fourth holding part 17 on the equipment carrier 3rd As itself FIG. 5 can be seen, the mating plug contacts 18 of the fourth holding member 17 are passed through the device carrier 3 in the plug-in region 40, whereby they are electrically connected to the support profile facing back 45 of the device carrier 3 via the aforementioned cable 19 with the power electronics 20. Appropriately, the mating plug contacts 18 can for this purpose have metallic contact elements which can be configured at a side remote from the third holding part 14 end as a connector 46, in which stripped Ends of the cables 19 are simply plugged in to electrically connect the conductors running therein with the mating plug contacts 18. When plugging the plug contacts 15 with the mating plug contacts 18, the associated contact elements act like electrical connectors.

The respective first holding part 12, the second holding part 13, the third holding part 14 and the fourth holding part 17 are each plastic parts, which can be produced by injection molding particularly inexpensive in large quantities. In order to form the plug-in contacts in the third holding part 14, corresponding electrical contact elements are installed. To form the mating plug contacts 18, corresponding electrical contact elements are likewise installed in the fourth holding part 17. The fourth holding part 17 can according to FIG. 6 a base body 47, on which a separate closure body 48 is placed. If the closure body 48 is missing, the electrical contact elements can be inserted into the plug-in region 40 in order to form the mating plug-in contacts 18. By attaching the closure body 48, the contact elements used are then secured.

If two holders 8 are used to fix the respective lighting device 4 on the equipment carrier 3, it is basically sufficient to design only one of these holders 8 in such a way that an electrical connection of the respective lighting device 4 through the holder 8 can take place. It may then be expedient to provide only one of the holders 8 with the said electrical contact elements. The other holder 8 can then be designed basically identical, with only the electrical contact elements are missing.

Like yourself FIG. 9 can be seen in a two-lamp lamp 1 may be provided that with the help of the same holder 8 two lighting devices 4 to separate, but mutually parallel pivot axes 9 pivotally mounted on the equipment carrier 3 can be attached. The respective holder 8 then has at least one separate first holding part 12, a common second holding part 13, a common third holding part 14 and a common fourth holding part 17 for the two lighting devices 4.

Claims (14)

1. Rectilinear and elongated light fixture, in particular for a strip light,

   - with a rectilinear or elongated support profile (2) for mounting on the wall or ceiling,

   - with a rectilinear and elongated equipment carrier (3) that is detachably fastened to the support profile (2),

   - with at least one rectilinear and elongated light device (4) that comprises a rectilinear and elongated mounting rail (7) and which is fastened by means of a least one holder (8) to the equipment carrier (3) so that it can swivel about a swivel axis (9),

   - wherein the respective light device (4) has at least one electrical lighting means (10) on a front side of the respective mounting rail (7),

   - wherein at least one such holder (8) has at least one separate first holding part (12), which is fastened on a rear side of the respective mounting rail (7),

   - wherein the respective holder (8) has a separate second holding part (13) on which the respective first holding part (12) is mounted so that it can swivel about the swivel axis (9),

   - wherein the respective holder (8) has a separate third holding part (14) that is arranged on the second holding part (13) and which has electrical plug contacts (15) that can be electrically connected to the at least one lighting means (10),

   - wherein the respective holder (8) has a separate fourth holding part (17), which is fastened to the equipment carrier (3), which has electrical mating plug contacts (18) that are formed complementary to the plug contacts (15) of the third holding part (14), which are in electrical contact with the plug contacts (15), and which are electrically connected to a power supply (20), characterised in that the fourth holding part (17) is fastened by the third holding part (14) to the second holding part (13).
2. Light fixture according to claim 1, characterised in that the third holding part (14) is arranged between the second holding part (13) and the fourth holding part (17) in a fastening device (36) in which the fourth holding part (17) is fastened to the second holding part (13).
3. Light fixture according to one of claims 1 and 2, characterised in that the fourth holding part (17) has at least one snap-fit hook (34) that passes through a passage opening (37) of the third holding part (14) and is engaged in a locking manner with a catch opening (35) of the second holding part (13).
4. Light fixture according to one of claims 1 to 3, characterised in that the respective first holding part (12) is held by a catch means (21) on the second holding part (13), which permits a swivelling adjustment about the swivel axis (9) between the first holding part (12) and second holding part (13) in several catch stages, with which respectively a predetermined swivel angle is associated.
5. Light fixture according to one of claims 1 to 4, characterised in that

   - the respective first holding part (12) has a ring (22),

   - the second holding part (13) has a pin (24) for the respective first holding part (12), on which the respective ring (22) is axially mounted.
6. Light fixture according to claims 4 and 5, characterised in that

   - the ring (22) has on its inner circumference an inner toothed section (23),

   - the pin (24) has on its outer circumference an outer toothed section (25), which co-operates with the respective inner toothed section (23) to form the catch stages.
7. Light fixture according to claim 5 or 6, characterised in that the respective ring (22) has distally to the mounting rail (7) a spring region (26) that allows an elastic expansion of the ring (22) against a restoring force.
8. Light fixture according to one of claims 1 to 7, characterised in that the mounting rail (7) has on its rear side an axial guide (27) into which the respective first holding part (12) is axially inserted with a foot (29).
9. Light fixture according to one of claims 1 to 8, characterised in that

   - electrical cables (16), whose respective conductors electrically sheathed by an insulator are electrically connected to at least one lighting means (10), are introduced into a contact region (33) of the second holding part (13) and are positioned therein with positioning means,

   - the plug contacts (15) of the third holding part (14) are formed at their end facing towards the second holding part (14) as displacement contacts, which when the third holding part (14) is placed on the second holding part (13) in the contact region (33) pass through the respective insulation of the cables (16) and directly contact the respective electrical conductors.
10. Light fixture according to one of claims 1 to 9, characterised in that

    - the third holding part (14) is in locking engagement with the second holding part (13), and/or

    - the fourth holding part (17) is in locking engagement with the second holding part (13).
11. Light fixture according to one of claims 1 to 10, characterised in that the fourth holding part (17) is in locking engagement with the equipment carrier (3).
12. Light fixture according to claim 11, characterised in that

    - the fourth holding part (17) has a plate (39) abutting a front side (38) of the equipment carrier (3), starting from which a plug region (40) comprising the mating connection contacts (18) passes through a plug opening (41) of the equipment carrier (3) and is in locking engagement with the plug opening (41) by means of at least one catch element (42) formed on the plug region (40),

    - at least one catch lug (43) starts from the plate (39) also distally to the plug region (40), which passes through a catch opening (44) of the equipment carrier (3) and is in locking engagement therewith.
13. Light fixture according to one of claims 1 to 12, characterised in that

    - the respective lighting means is formed by a rectilinear and elongated plate (10) with several LEDs (11) arranged thereon,

    - the equipment carrier (3) carries on its rear side (45) a power electronics (20) supplying the respective lighting means (10) with electrical energy, which in the installed state of the light fixture (1) is connected to the mains power supply,

    - the mating connection contacts (18) of the fourth holding part (17) are electrically connected to the power electronics (20).
14. Light fixture according to one of claims 1 to 13, characterised in that

    - two lighting devices (4) are provided adjacent to one another, which can swivel independently of one another in each case about a separate swivel axis (9),

    - the respective holder (8) for the two lighting devices (4) has respectively at least one separate first holding part (12), a common second holding part (13), a common third holding part (14), and a common fourth holding part (17).

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