WO2006018285A1

WO2006018285A1 - Raster arrangement

Info

Publication number: WO2006018285A1
Application number: PCT/EP2005/008897
Authority: WO
Inventors: Siegfried Bickel
Original assignee: Zumtobel Lighting Gmbh.
Priority date: 2004-08-16
Filing date: 2005-08-16
Publication date: 2006-02-23
Also published as: DE102004039676A1; EP1779029A1; EP1779029B1

Abstract

The invention relates to a raster arrangement (10) comprising a plurality of raster elements (11) which are arranged next to each other. Said raster elements, which comprise reflecting lateral walls in order to suppress glare of the light emitted by the light source (2), are formed by separate profiled lameller elements (11) made of a full material, which are maintained on both ends thereof by a frame part.

Description

grid array

The present invention relates to a raster arrangement for directing or blinding the light emitted by a light source, which has a multiplicity of juxtaposed raster elements with reflective side walls.

Such grid arrangements are used in particular in so-called lamp grids, which are often used as light-influencing elements in luminaires and are intended to concentrate or limit the light emitted by a light source to a predetermined angular range. By such optical elements can be prevented that people are blinded by the light emitted by the light. In addition, disturbing reflections, in particular on vertical surfaces such as e.g. Screens or windows are avoided. Light grids are therefore used in particular in rooms where there are workstations.

A classic lighting grid usually consists of two side reflectors and a plurality of extending between the side reflectors cross blades. The side reflectors ensure glare-free glare when looking from the side onto the luminaire, while the cross-fins are responsible for glare-free glare when viewed in the longitudinal direction of the light source. In classic lamp grids, these cross blades are formed of sheet metal V-shaped and have a slightly concave side surface. However, simpler embodiments of transverse blades may also consist of simple sheet metal sections or sheet metal strips which do not have a concave shape.

All known embodiments of lamp grids have in common that the cross blades have a certain basic height in relation to the side walls of the luminaire grid. Typically, the cross blades are about half the height of the side walls to allow for the desired optical effect of the light suppression. In addition, a certain ratio between distance and height of the individual slats must be complied with. A typical luminaire grid of the type described above is known, for example, from US Pat. No. 6,139,169. The grid elements shown in this publication have a height of several centimeters - about 5 cm - on, wherein the distance between two adjacent grid elements is dimensioned slightly larger. Due to these dimensions, however, the possibilities of reducing the overall height of a luminaire are limited.

The present invention has for its object to provide a grid arrangement for glare of the light emitted from a light source, which is as independent as possible of the side reflectors of a luminaire grid in their design and on the other opens up the possibility of grid arrangement in the lowest possible height realize. In addition, it should be possible to provide the grid arrangement without much effort in different dimensions available.

The object is achieved by a grid arrangement, which has the features of claim 1. Further developments of the invention are the subject of the dependent claims.

The grid assembly according to the invention accordingly consists of a plurality of adjacently arranged grid elements with reflective side walls, wherein according to the invention, the grid elements are formed by separate profiled plate elements made of solid material, which are held at its two ends in each case by a frame part.

The ability to provide raster arrangements in different dimensions without much effort is thus inventively opened up by the fact that the raster elements are now formed by separate lamellar elements, which are held at its two ends in each case by a frame part. By using separate lamella elements made of solid material, it is possible to produce a plurality of lamellar elements in different lengths and then to form these with the aid of the frame parts to the latching arrangement in the desired dimension. The effort to realize in this way a grid arrangement in a particular desired dimension, is significantly lower than in other solutions in which the grid assembly is formed as a whole in one piece.

It should be noted that the lamellar elements according to the invention compared to the aforementioned sheet metal strips differ in that they are made of solid material and therefore do not have the shape of a thin strip. In particular, the ratio of height to width of a fin element should be less than 10: 1, so that the elements themselves have a certain intrinsic stability.

In a further development of the basic idea of the invention, it is proposed to reduce the height of the lamellar elements dramatically, thereby creating the possibility of realizing light-influencing elements for glare-freeing the light emitted by a light source in a significantly reduced height. Although it may be necessary to reduce the spacing between the elements as well by reducing the height of the lamellar elements, this is certainly also desirable since this results in a more homogeneous appearance of the latching arrangement.

According to a particularly preferred embodiment of the present invention, the lamellar elements are formed by profiled metal rods. These metal rods may, for example, consist of chromium-nickel steel or aluminum and can be cut to length in a simple manner in the required length. As a result, the realization of grid arrangements in different dimensions is particularly simplified.

The lamellar elements preferably have a substantially triangular cross-section, it being possible, analogously to conventional transverse lamellae, for the side walls to be slightly curved. Preferably, the height of the lamellar elements is max. 3 mm, wherein the width of the lamellar elements in a range of max. 2 mm at the widest point.

In a classical manner, the lamellar elements are designed straight, but it would also be conceivable to use concave or convex curved lamellar elements, which for optical reasons may well be desired and even causes a particularly effective glare of the light emitted by a light source in certain situations.

In a first variant, the frame parts for holding the lamella elements may be made of plastic, wherein the lamellar elements are then arranged with their end portions at least partially within these frame parts. This can be done, for example, by the fact that the lamellar elements are cast with their end portions in the frame parts.

An alternative possibility, however, is to provide the frame parts with openings into which the lamellar elements are then inserted with their end regions. In this case, it may be in the frame parts in particular also act on a side reflector, on the underside then the lamellar elements are arranged. As a result, a luminaire grid with two elongate side reflectors and the lamellar elements designed in accordance with the invention extending therebetween are obtained overall. Accordingly, the present invention also relates to a luminaire grid with elongated side reflectors and a latching arrangement in the manner described above.

The present invention will be explained in more detail with reference to the accompanying drawings. Show it:

1 shows a first embodiment of a lamp with a grid arrangement according to the invention in section;

FIG. 2 shows an enlarged detail of the luminaire illustrated in FIG. 1 in a perspective view; FIG.

3 shows a lamellar element in cross section;

4 shows a second variant of a grid arrangement according to the invention in FIG

Section;

FIG. 5 an enlarged detail of the luminaire illustrated in FIG. 4 in a perspective view; FIG.

6 shows a third embodiment of a luminaire with a grid arrangement according to the invention;

7 shows a section of the grid arrangement used in the exemplary embodiment in FIG. 6 in a top view, FIG.

8 is an enlarged detail of the embodiment of Figure 6 in a perspective view.

Fig. 9 shows a further variant of a locking arrangement according to the invention and

10 shows an embodiment of a grid arrangement in which the

Lamella elements are concavely curved. Fig. 1 shows an application example of the present invention, a light, as it comes in a classic way, for example, in offices or other workstations for use. Essential elements of the lamp provided with the reference numeral 1 are on the one hand an elongated light source 2 in the form of a gas discharge lamp, in particular a fluorescent tube, which is arranged in a housing formed by two side walls 3, which also - not shown - means for fixing the lamp. 1 has on a ceiling and is provided for storage of equipment for the lamp 2, for example. Of electronic ballasts.

Seen in light emission direction in front of the light source 2, a luminous grid provided with the reference numeral 4 is arranged, which is provided for glare of the light emitted from the light source 2. This light grid 4 initially consists of two slightly curved side reflectors 5, which are responsible for a glare at a view from the side and either consist of a reflective material or at least have reflective inner walls. For a glare in a view in the longitudinal direction of the fluorescent tube 2 provides a arranged at the lower end of the side reflectors 5 locking assembly 10, which consists of a plurality of mutually parallel slat elements 11.

These lamellar elements 11, one of which is shown in cross-section in Fig. 3, according to a preferred embodiment of the present invention of profiled metal rods, which are seen in cross-section triangular or wedge-shaped, the two side walls converge towards the bottom. The side walls of the lamellar elements 11 may be slightly curved according to the design of classical grid lamellae, as can likewise be taken from the sectional view in FIG. Other shapes for the lamellar elements 11 would also be conceivable. For example, these could also be trapezoidal or rectangular. It is essential, however, that the lamellar elements 11, the thickness of which, viewed in the emission direction, is tapered or at least constant, consist of solid material and are not formed by simple strips of a reflective material. Thus, the ratio of height to width of a fin element 11 should not exceed the factor 10: 1.

A special feature of the illustrated embodiment is that the lamellar elements 11 provided for glare have a very small height, which is in the range below about 5 mm and preferably in the range of about 3 mm. On its upper side, the lamellar elements 11 have a width of about 2 mm. Due to the very small dimensions of the slat elements 11 responsible for glare control, it is necessary for them to have a relatively small spacing between them in the longitudinal direction. In the above-mentioned dimensions with a height of 3 mm and width of 2 mm, for example, it is provided that the lamellar elements have a distance of about 5 mm from one another.

Because the lamellar elements 11 are formed by separate components, it is possible to provide them in various lengths. In particular, in the embodiment in which the lamellar elements 11 are formed by profiled metal rods, the individual fin elements 11 can be cut in a simple manner in the desired length, so that the cost of producing lamellar elements of different lengths is extremely low. However, it should be noted that it is not necessarily required to form the lamellar elements 11 from metal bars. It would also be conceivable to use other materials such as plastic or the like, which would then be sprayed in the appropriate length and then provided with a reflective layer.

It should also be pointed out that the lamellar elements 11 of a grid arrangement 10 do not all have to have the same length. Thus, it would be entirely conceivable to vary the length of the lamellar elements 11 in the longitudinal direction of the grid arrangement 10 in order, for example, to create a trapezoidal or elliptical grid arrangement. Other forms could be realized in this way.

Due to the fact that the lamellar elements 11 are formed by separate components, it is necessary to assemble them by means of lateral frame parts to the desired grid assembly 10. In the embodiment shown in FIGS. 1 and 2, the two side reflectors 5 of the light grid 4 at the same time also form the frame parts for holding the lamellar elements 11. As the illustrations in FIGS. 1 and 2 can be seen, have the two side reflectors 5 insertion openings 8a and 8b, in which the lamellar elements 11 are inserted with their end portions. Strictly speaking, in the illustrated embodiment, the side reflectors 5 are flanged at their lower ends 6, wherein in both the downwardly directed inner wall 7a and in the upwardly curved outer wall 7b insertion openings 8a and 8b are provided, so that the end portions of the profiled metal rods completely through this Both walls 7a, 7b can be pushed through. The openings 8a and 8b are dimensioned such that the metal rods in the openings 8a, 8b through Friction be held. This results in a total of a stable arrangement of a luminaire grid with two side reflectors 5, on the underside of a grid assembly 10 is arranged in the sense of the present invention. The luminaire grid achieved in this way has excellent optical properties with respect to the glare of the light emitted by the light source 2 and, due to the filigree lamellar elements 11, furthermore gives the luminaire 1 overall an appealing appearance.

4 and 5 show a second variant of the grid arrangement according to the invention, in which again the frame parts for the lateral support of the lamellar elements are formed by the lower regions of two side reflectors 5 of a luminaire grid. The difference from the exemplary embodiment of FIGS. 1 and 2 is that the lower end region 6 of the side reflector 5 is flanged in an angular shape and only the inner wall 7a has an insertion opening 8a for the end regions of the lamella elements 11. In contrast to the first embodiment, this means that the end region of the lamellar elements 11 do not protrude beyond the outer side walls 7b, which is deliberately sought in some cases for optical reasons.

A third embodiment of the present invention is shown in FIGS. 6 to 8 and differs from the first two embodiments substantially in that now no longer form the side walls 5 of a luminaire grid, the frame parts for the latch assembly 10. Instead, the locking arrangement 10 is now designed as a separate element which is attached only to the underside of the reflectors 5. Corresponding to the illustrations in FIGS. 6 to 8, separate elongate frame parts 15 are accordingly provided which each hold the end regions of the lamella elements 11. These frame parts 15 may, for example, consist of plastic, wherein the lamellar elements 11 then, for example, can still be pressed into the soft plastic frame to form the desired latching arrangement 10. In a preferred embodiment, however, the lamellar elements 11 are encapsulated at their ends with the plastic to form the frame parts 15, which is preferable for manufacturing reasons, since this is a particularly simple production of the grid assembly 10 is made possible. Of course, however, these separate frame parts 15 could in turn have plug-in openings into which the lamellar elements 11 are inserted.

The resulting total grid assembly 10, which - as already mentioned - can be produced in a variety of dimensions and shapes, can then be secured to the underside of the side reflectors 5, whereby the arrangement shown in Figs. 6 and 8 is achieved.

A further variant of the grid arrangement 10 according to the invention is shown in FIG. 9. In this embodiment, the lateral frame members 15 are also seen triangular in cross-section and have the preferred slightly curved profile. This particular embodiment of the frame parts 15 may be desired in certain embodiments to achieve special optical effects.

In the previously discussed variants of the grid arrangement according to the invention, the lamellar elements were seen always straight in the longitudinal direction. However, FIG. 10 now shows a variant according to which the lamellar elements 11 are slightly curved. This particular curvature can be used in particular to achieve a particular form of light output and also causes a special appearance of the lamp.

It should also be noted that with a particularly flat design of the luminaire grid, it would now also be possible to make the luminaires overall much flatter. In particular, it would no longer be necessary to arrange the light source at a greater distance from the latching arrangement in a corresponding embodiment of the grid arrangement in which the lamellar elements are arranged very close to each other. Instead, it is now also possible to realize luminaires which, despite their extremely low overall height, have the photometric properties required for optimum illumination of workplaces.

Claims

claims

1. grid arrangement (10) having a plurality of juxtaposed grid elements (11) with reflective side walls for glare of a light source (2) emitted light, characterized in that the grid elements are formed by separate profiled slat elements (11) of solid material, which are each held by a frame part at its two ends.

2. Raster arrangement according to claim 1, characterized in that the lamellar elements are formed by profiled metal rods (11).

3. Grid arrangement according to claim 2, characterized in that the metal rods consist of aluminum.

4. Grid arrangement according to one of the preceding claims, characterized in that the thickness of the lamellar elements (11) seen in the emission direction is tapered or at least constant.

5. Grid arrangement according to claim 4, characterized in that the lamellar elements (11) have a substantially triangular cross-section.

6. Grid arrangement according to claim 5, characterized in that the side walls of the lamellar elements (11) are curved.

7. Grid arrangement according to one of the preceding claims, characterized in that the ratio of height to width of a fin element (11) does not exceed 10: 1.

8. Grid arrangement according to one of the preceding claims, characterized in that the lamellar elements (11) have a height of a maximum of 5mm.

9. grid arrangement according to claim 8, characterized in that the lamellar elements (11) have a height of about 3mm.

10. grid arrangement according to claim 9, characterized in that the lamellar elements (11) have a width of about 2mm.

11. Grid arrangement according to one of the preceding claims, characterized in that the lamellar elements (11) are straight.

12. Grid arrangement according to one of claims 1 to 10, characterized in that the lamellar elements (11) are concave or convex curved.

13. Grid arrangement according to one of the preceding claims, characterized in that the frame parts (15) consist of plastic, wherein the lamellar elements (11) are at least partially cast with their end portions in the frame parts (15).

14. Grid arrangement according to one of claims 1 to 12, characterized in that the frame parts (15) have openings (5a) in which the lamellar elements (11) are inserted with their end portions.

15. Grid arrangement according to one of the preceding claims, characterized in that the frame parts are each formed by a side reflector (5), on the underside of the lamellar elements (11) are arranged.

16. Luminaire grid (1) with two elongated side reflectors (5) and a plurality of between the two side reflectors (5) extending raster elements (11), characterized in that the grid elements (11) are components of a grid arrangement (10) according to one of the preceding claims.

17 light with a light source (2) and a - seen in the emission direction - in front of the light source (2) arranged luminaire grid (11) according to claim 15.