EP3217070B1 - Illumination device - Google Patents

Description

The invention relates to a lighting device for illuminating a, in particular rectangular, surface piece of a facade, wall, ceiling, floor surface or the like, with at least three radiators, each having a point light source, preferably in the form of an LED, and a light source associated with the reflector the reflector substantially completely captures the light of the associated light source and casts it on the patch to be illuminated, and is composed of two shell halves, each of which shell halves distributes the respective captured light to the entire patch to be illuminated.

Such lighting devices are also known under the name "wallwasher" in the lighting industry and serve to illuminate a, in particular rectangular, surface piece of a facade, wall ceiling, floor surface or the like as homogeneously as possible.

A lighting device according to the preamble of claim 1 is known from WO 2014/019703 known. Although it has been found that the illumination device disclosed in this document achieves an improvement in the illumination of a patch in terms of homogeneity compared to the prior art mentioned in this document, there is still a need for optimization in this respect. A tilt of the radiator to each other is in the WO 2014/019703 shown as disadvantageous.

Another disadvantage of in the WO 2014/019703 disclosed lighting device is that the illumination device for illuminating a sheet must extend over substantially the entire width of the sheet. This requires a large amount of space and can be perceived by a user as disturbing.

The objective technical object of the present invention is therefore to provide a lighting device according to the preamble of claim 1, which is characterized in particular by an even more homogeneous lighting a, in particular rectangular, surface piece of a facade, wall, ceiling, floor surface or the like and a reduced space requirement Has.

This object is achieved by the features of independent claim 1.

It is therefore provided according to the invention that the reflector is formed substantially mirror-symmetrical to a plane of symmetry and the lighting device comprises a receiving device for the radiator, wherein the at least three radiators are arranged in the receiving device such that the plane of symmetry of at least one, preferably each, reflector opposite tilted at each plane of symmetry of all other reflectors.

Surprisingly, therefore, just a special embodiment of the leads in the WO 2014/019703 as a non-necessary and disadvantageously described measure to a significant improvement in the homogeneity of the lighting. In addition, it is possible to arrange the radiator with a smaller distance from each other in the receiving device, which significantly reduces the space required for the lighting device, whereas it is in the solution according to the WO 2014/019703 it is necessary to distribute the radiators substantially over the entire width of the wall to be illuminated.

According to a preferred embodiment, it is provided that the reflector has a mounting plate, via which it is connected to the receiving device, and the mounting plate is aligned substantially perpendicular to the plane of symmetry. In the event that the symmetry plane of each reflector with respect to each plane of symmetry of all other reflectors is tilted, each mounting plate of each reflector is tilted with respect to each mounting plate of all other reflectors.

Advantageously, it is provided that the reflectors of the at least three radiators are arranged substantially mirror-symmetrically to a main plane of symmetry, preferably wherein the main plane of symmetry is arranged substantially in the middle of the cradle, and particularly preferably the cradle is formed substantially mirror-symmetrical to this main plane of symmetry of the reflectors , In this case, therefore, not only the reflectors as such are constructed essentially mirror-symmetrically, but also arranged relative to one another essentially mirror-symmetrically to a main plane of symmetry.

With regard to the light distribution, it has also proved to be favorable that the planes of symmetry of the reflectors of at least three radiators have a common axis of intersection and / or the illumination device comprises an odd number of radiators.

Two particularly preferred embodiments are that the receiving device is cuboid, and preferably comprises five radiators or the receiving device is cylindrical, and preferably comprises three radiators.

According to an advantageous embodiment, it is provided that the lighting device comprises a mounting device for mounting the lighting device on a ceiling or the like.

In order to simplify the alignment of the lighting device relative to the surface piece to be illuminated, it may be additionally provided that the lighting device has a pivoting mechanism, via which the receiving device is pivotable relative to the mounting device. Advantageously, is the Swiveling mechanism designed such that it allows a pivoting of the receiving device to a - in the position of use of the lighting device - vertical axis, preferably by 360 °, and / or - in the position of use of the lighting device - horizontal axis, preferably by 90 °.

Further details and advantages of the present invention will be explained in more detail below with reference to the description of the figures with reference to the drawings.

Show:

Fig. 1

a lighting device according to a first preferred embodiment in an exploded view,

Fig. 2

the lighting device according to FIG. 1 when assembled in a perspective view,

Fig. 3

the lighting device according to FIG. 1 or 2 in the assembled state in a view from below,

Fig. 4

the lighting device according to FIG. 1, 2 or 3 in the assembled state in a first side view,

Fig. 5

the lighting device according to FIG. 1, 2 . 3 4 in the assembled state in a second side view,

Fig. 6

a lighting device according to a second preferred embodiment in an exploded view,

Fig. 7

the lighting device according to Fig. 6 in the assembled state in a side view,

Fig. 8

an exploded view of the receiving device 22 of the lighting device according to the second embodiment,

Fig. 9

an advantageous embodiment of the reflector in a perspective view, and

Fig. 10

a schematic representation of a arranged on a ceiling lighting device according to the invention for illuminating a rectangular sheet of a wall.

FIG. 1 shows an exploded view of a first preferred embodiment of the lighting device. The centerpiece is a receiving device 21 for receiving five radiators 5, 6, 7, 8, and 9 (see FIG FIG. 2 ). The radiators 5, 6, 7, 8 and 9 each comprise an LED module 34 with a point-shaped light source in the form of an LED and a reflector 13 associated with the light source. Details of this reflector 13 are described with reference to FIGS FIG. 9 described in detail below.

The radiators 5, 6, 7, 8, and 9 are arranged in a housing 33. The housing 33 is closed by means of a cover 36. The rear sides of the reflectors 13, which protrude out of the housing 33, are covered by a rear wall 35 connected or connectable to the housing 33. At the top of the housing 33, a heat sink 57 is arranged.

The lighting device further comprises a mounting device 26 for mounting the lighting device on a ceiling or the like. This mounting device 26 is composed in this embodiment of two angled longitudinal plates 38, which are connected to each other via two arranged on the short sides sheet metal parts 39.

The mounting device 26 can be inserted into an opening in the ceiling. Subsequently, the receiving device 21 can then be releasably locked via two arranged on the receiving device 21 Federschnapper 37.

FIG. 2 shows the lighting device 1 according to this embodiment in the assembled state.

FIG. 3 shows a view of this lighting device 1 from below. The light emitted by the lighting device 1 is emitted to the left in this illustration. In particular from this illustration, the relative orientation and arrangement of the radiators 5, 6, 7, 8, and 9 and the reflectors 13 of these radiators in this lighting device 1 is apparent:

Adjacent to a central radiator 7, which is arranged in the center of the receiving device 21, two further radiators 5, 6 and 8 and 9 are arranged on both sides. The plane of symmetry 18 of the central radiator 7 is aligned substantially perpendicular to the longitudinal sides of the receiving device 21 (the angle 56 is thus approximately 90 °).

The reflectors 13 of the radiators 5, 7, and 9 and 6, 7 and 8 each have a common cutting axis 32 and 25, wherein these cutting axes 25 and 32 are arranged parallel to each other.

The plane of symmetry 17 of the reflector 13 of the radiator 6 is tilted at an angle 50 with respect to the plane of symmetry 18 of the reflector 13 of the radiator 7. The plane of symmetry 19 of the reflector 13 of the radiator 8 is tilted at an angle 49 with respect to the plane of symmetry 18 of the reflector 13 of the radiator 7. Of the magnitude, the two angles 49 and 50 are substantially equal, only the signs differ relative to the plane of symmetry 18. In other words, the reflectors 13 of the radiators 6 and 8 are rotated in opposite directions from the central radiator 7.

The same applies to the alignment of the reflectors 13 of the radiator 5 and 9 relative to the central radiator 7 and to the adjacent radiators 8 and 6 (see also the angle 51 between the plane of symmetry 16 of the reflector 13 of the radiator 5 and the plane of symmetry 18 of the reflector 13 of the radiator 7 and 52 between the plane of symmetry 20 of the reflector 13 of the radiator 9 and the plane of symmetry 18 of the reflector 13 of the radiator 7). Overall, the plane of symmetry 16, 17, 18, 19 and 20 of each reflector 13 is tilted with respect to each plane of symmetry 16, 17, 18, 19, 20 of all other reflectors.

Moreover, in the specific embodiment shown, the reflectors 13 of the radiators 5, 6, 7, 8 and 9 are arranged substantially mirror-symmetrically to a main symmetry plane 24, this main symmetry plane 24 being substantially congruent with the plane of symmetry 18 of the reflector 13 of the central radiator 7 ,

In addition, the main plane of symmetry 24 is arranged substantially in the center of the receiving device 21. In addition, the receiving device 21 is formed substantially mirror-symmetrically to this main plane of symmetry 24 of the reflectors 13.

The FIGS. 4 and 5 show two side views of the lighting device 1 according to the first preferred embodiment and once in the case of FIG. 4 in a plan view of one of the long sides and in the case of FIG. 5 in a plan view of one of the end faces.

FIG. 6 shows an exploded view of a lighting device 2 according to a second preferred embodiment. The lighting device 2 in this case comprises a cylindrical receiving device 22, in which a total of three radiators 10, 11 and 12 are arranged. Details of the pickup device 22 will be described with reference to the following FIG. 8 described in more detail.

The lighting device 2 further comprises a mounting device 27 for mounting the lighting device 2 on a ceiling or the like. The mounting device 27 is composed in detail of a lower housing part 40 and an upper housing part 41, wherein between the two housing parts 40 and 41, a power supply unit 44 for the three point-shaped light sources in the form of LEDs of the radiator 10, 11 and 12 is arranged. In the specific case, the mounting device 27 is designed to be fastened to a rail system to which the mains voltage is applied. For passing the mains voltage to the voltage supply unit 44, an adapter 42, which is arranged on the outer side of the upper housing half 41, is provided.

The receiving device 22 is connected via a pivoting mechanism 29 (see FIG FIG. 8 ) relative to the mounting device 27 pivotally.

FIG. 7 shows a side view of the lighting device 2 in the assembled state.

FIG. 8 shows an exploded view of the receiving device 22 and the pivoting mechanism 29, which on the one hand forms a bearing point on the receiving device 22 and on the other hand a bearing point on the mounting device 27.

The receiving device 22 comprises a cylindrical housing 43, which can be closed by a cover 45. Through this cover, a part of the pivoting mechanism 29 passes. The pivoting mechanism 29 is designed such that it allows a pivoting of the receiving device 22 by a vertical axis 30 in the position of use of the lighting device 2 by 360 ° and in the position of use of the lighting device 2 horizontal axis 31 by 90 °. About a pin 58 of the pivoting mechanism and thus the receiving device 22 are mounted on the mounting device 27.

In the upper part of the housing 43, a heat sink 59 is arranged. This serves to efficiently dissipate heat generated by the operation of the radiators 10, 11, and 12 arranged in the lower part of the housing 43.

The device for holding the three radiators 10, 11 and 12 is composed of an upper part 46 and a lower part 47, wherein on the lower part 47 attachment points for the three radiators 10, 11 and 12 are formed.

The three radiators 10, 11 and 12 each comprise a punctiform light source in the form of an LED, which is formed on an LED module 34, and a reflector 13 associated with the light source. The planes of symmetry of the reflectors 13 are substantially perpendicular to the mounting plate 23 of the reflectors 13 (compare FIG. 9 ) or to the LED modules 34 aligned. In the planes of symmetry are the dashed lines 53, 54, 55, which make the attachment of the radiators 10, 11 and 12 at the lower part 47 by means of fasteners 60 in the form of cylinder screws, mark.

On the basis of these orientation lines 53, 54 and 55 it is clear that the plane of symmetry of each reflector 13 is tilted with respect to each plane of symmetry of all the other reflectors 13. The plane of symmetry of the reflector 13 of the central radiator 12 coincides with a main plane of symmetry, to which the reflectors 13 of the three radiators 10, 11 and 12 are arranged substantially mirror-symmetrically. In this case too, this main symmetry plane is in turn arranged substantially in the middle of the receiving device 22 and the receiving device 22 is formed substantially mirror-symmetrically to this main symmetry plane of the reflectors 13.

FIG. 9 shows a preferred embodiment of the reflector 13 of the radiator 5, 6, 7, 8, 9, 10, 11 and 12. Basically, the reflector 13 is formed so that it substantially completely captures the light of the associated light source and the surface to be illuminated throws. Furthermore, the reflector 13 is composed of two shell halves 14 and 15, of which shell halves 14 and 15 each distributes the respective captured light to the entire surface to be illuminated. The reflector 13 is in Essentially formed mirror-symmetrically to a plane of symmetry. The plane of symmetry is indicated by a dashed line 61. The reflector further comprises a mounting plate 23, via which it can be connected to the receiving device 21 or 22 of the lighting device 1 and 2 respectively. The mounting plate 23 is aligned substantially perpendicular to the plane of symmetry of the reflector 13. On the inner surface of the two shell halves 14 and 15 facets 48 are arranged.

The reflector 13 is simply reflective. This means that all the light emitted and captured by the associated light source is only reflected once. Each of the shell halves 14 and 15 distributes the respective captured light with single reflection to the entire area illuminated by the reflector 13.

Furthermore, it should be noted that the shell halves 14 and 15 are each formed double convergent reflective, such that the entire captured light is radiated substantially completely on different sides of the associated light source to the light source, each having a left shell edge portion of the shell halves 14 and 15th a right edge portion of the illuminated patch illuminates and a right bowl edge portion of the shell halves 14 and 15 illuminates a left edge portion of the illuminated patch, a lower shell edge portion of the shell halves 14 and 15 illuminates an upper edge portion of the illuminated patch and a top shell edge portion of the shell halves 14 and 15 illuminates a lower one Edge portion of the illuminated patch illuminated.

The reflector 13 can be connected to the LED module 34 in such a way that the punctiform light source in the form of an LED is arranged substantially in the plane of symmetry of the reflector 13, ie approximately in the middle.

FIG. 10 schematically shows a possible arrangement of the lighting device 1 or 2 on a ceiling 28 of a room for illuminating a rectangular sheet 3 of a wall 4. The width 62 of the lighting device 1 and 2 is in relation to the width 63 of the illuminated sheet 3 comparatively low, a Advantage associated with the solution according to the WO 2014/019703 A1 is not achievable.

Claims (10)

1. An illumination device (1, 2) for illuminating an in particular rectangular surface portion (3) of a façade, wall (4), ceiling, floor surface or the like, comprising at least three radiating devices (5, 6, 7, 8, 9, 10, 11, 12) which each have a respective punctiform light source, preferably in the form of an LED, and a reflector (13) associated with the light source, wherein the reflector (13) substantially completely catches the light of the associated light source and directs it on to the surface portion (3) to be illuminated, and is composed of two shell halves (14, 15), of which shell halves (14, 15) each distributes the respectively caught light on to the whole surface portion (3) to be illuminated, characterised in that the reflector (13) is of a substantially mirror-symmetrical configuration relative to a plane of symmetry (16, 17, 18, 19, 20), and the illumination device (1, 2) has a receiving device (21, 22) for the radiating devices (5, 6, 7, 8, 9, 10, 11, 12), wherein the at least three radiating devices (5, 6, 7, 8, 9, 10, 11, 12) are arranged in the receiving device (21, 22) in such a way that the plane of symmetry (16, 17, 18, 19, 20) of at least one and preferably each reflector (13) is tilted with respect to each plane of symmetry (16, 17, 18, 19, 20) of all other reflectors (13).
2. An illumination device (1, 2) according to claim 1 wherein the reflector (13) has a mounting plate (23) by way of which it is connected to the receiving device (21, 22) and the mounting plate (23) is oriented substantially perpendicularly to the plane of symmetry (16, 17, 18, 19, 20).
3. An illumination device (1, 2) according to claim 1 or claim 2 wherein the reflectors (13) of the at least three radiating devices (5, 6, 7, 8, 9, 10, 11, 12) are arranged in substantially mirror-symmetrical relationship with a main plane of symmetry (24) preferably wherein the main plane of symmetry (24) is arranged substantially in the centre of the receiving device (21, 22) and particularly preferably the receiving device (21, 22) is of a substantially mirror-symmetrical configuration with respect to said main plane of symmetry (24) of the reflectors (13).
4. An illumination device (1, 2) according to one of claims 1 to 3 wherein the planes of symmetry (16, 17, 18, 19, 20) of the reflectors (13) of at least three radiating devices (5, 6, 7, 8, 9, 10, 11, 12) have a common section axis (25, 32).
5. An illumination device (1, 2) according to one of claims 1 to 4 wherein the illumination device (1, 2) includes an odd number of radiating devices (5, 6, 7, 8, 9, 10, 11, 12).
6. An illumination device (1) according to one of claims 1 to 5 wherein the receiving device (21) is of a parallelepipedic configuration and preferably includes five radiating devices (5, 6, 7, 8, 9).
7. An illumination device (2) according to one of claims 1 to 5 wherein the receiving device (22) is of a cylindrical configuration and preferably includes three radiating devices (10, 11, 12).
8. An illumination device (1, 2) according to one of claims 1 to 7 wherein the illumination device (1, 2) includes a mounting device (26, 27) for mounting the illumination device (1, 2) to a ceiling (28) or the like.
9. An illumination device (2) according to claim 8 wherein the illumination device (2) has a pivoting mechanism (29), by way of which the receiving device (22) is pivotable with respect to the mounting device (27).
10. An illumination device (2) according to claim 9 wherein the pivoting mechanism (29) is of such a design that it permits a pivotal movement of the receiving device (22) about an axis (30) which is vertical in the position of use of the illumination device (2), preferably through 360°, and/or an axis (31) which is horizontal in the position of use of the illumination device (2), preferably through 90°.

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