EP1337783A1

EP1337783A1 - Lamp with a cover panel

Info

Publication number: EP1337783A1
Application number: EP01989517A
Authority: EP
Inventors: Wolfgang Gadner; Gerald Ladstätter
Original assignee: Zumtobel Staff GmbH
Current assignee: ZUMTOBEL LIGHTING GmbH
Priority date: 2000-11-29
Filing date: 2001-11-26
Publication date: 2003-08-27
Also published as: WO2002044614A1; AU2002227947A1

Abstract

The invention relates to a lamp (1), comprising a base body (3) for accommodating at least one light source (5), an edge area (11c) on the base body (3) which is turned in the direction of the space (R) to be lit, and a transparent cover panel (8) which is directed towards the space to be lit (R) (8) and which at least partially covers the edge area (11c) as seen from the space to be lit (R). The aim of the invention is to avoid or to reduce the dark edge area of the lamp (1). To this end, the base body (3) and the cover panel (8) only converge at the outermost edge of the cover panel (8) and inside the edge, a free space (31) is formed in-between, allowing light from the light source (5) to enter directly, as far as the cover panel.

Description

Luminaire with a cover plate

The invention relates to a lamp according to the preamble of claim 1.

A lamp of this type belongs to a known lighting principle and is, for. B. described in DE 299 06 884 U. An essential part of such a luminaire are at least one receiving device for at least one light source, which generates the light required to illuminate a room, a cover plate which is arranged between the receiving device and the room to be illuminated and whose outer surface facing the room forms an emission surface, and one Base body on which the light source and the cover plate are held.

In known lamps of the present type, the cover plate of the lamp is arranged so that it is enclosed by the base body. In many cases, the cover plate is held on the base body in that it rests on an inner leg of the base body that extends approximately parallel to the cover plate.

In the case of recessed lights, an edge strip in the form of an outer leg may also protrude from the base body approximately parallel to the cover plate and serves to cover the installation gap of an installation opening, so that the installation gap is not visible from the room.

In these configurations, the base body has edge strips which are visible from the room to be illuminated and which are arranged on at least two mutually opposite sides of the lamp in the case of a lamp of a lamp strip and on the entire circumference of the lamp in the case of a single lamp, and in particular in the illuminated state of the lamp as dark Areas are visible.

DE 296 02 576 Ul describes a light panel that fits into a ceiling cladding and has a flat dome-shaped reflector, a light source arranged therein and a glass cover plate, the width of which corresponds to the width of the reflector and which rests on flat edge sections of the reflector. The cover plate and the reflector, which thus sandwich one another in their edge regions, are fastened to the underside of a holding frame, which in turn is fastened to the existing ceiling. The invention has for its object to design a lamp of the type specified so that the dark edge area is avoided or at least reduced.

This object is solved by the features of claim 1. Advantageous developments of the invention are described in the subclaims.

In the luminaire according to the invention, the base body and the cover plate only converge at the outermost edge of the cover plate, forming a free space within the edge, which essentially permits direct light radiation from the light source to the edge of the cover plate. As a result, the light irradiation in the edge region of the cover plate and the light radiation in the edge region of the cover plate are improved. In the embodiment according to the invention, light of greater luminance can thus be emitted in the edge region of the cover plate, specifically relative to the central region of the cover plate, whereby the dark edge region is avoided or at least reduced. It is essential that there is a free space between the cover plate and the edge region, which extends essentially to the edge of the cover plate and, on the other hand, the light source is arranged with respect to the free space in such a way that direct light radiation from the light source essentially up to to the edge of the cover plate. The lamp according to the invention is also advantageously suitable for a flat lamp with a flat dome-shaped reflector.

The object on which the invention is based is also achieved if the cover pane at least partially covers the edge region. The cover pane and its radiation surface preferably extend over the dark edge area, as a result of which this is avoided or at least reduced. This functional area of the luminaire is also illuminated. Another advantage of the invention is that a desired glare limitation is easier to achieve due to the enlarged light exit surface.

It is also advantageous to use such a cover plate, which emits light even on its narrow circumference. This leads to a lightening of the surroundings of the cover body and an edge strip which may not be completely covered.

In the embodiment according to the invention, holding devices arranged on both sides of the lamp can be arranged between the support body and the cover plate. It is furthermore advantageous to form the holding devices by so-called quick-closing connections, which enable quick and easy assembly and disassembly. Preferred configurations for such quick-connect connections are, for. B. locking devices and magnetically effective holding devices.

The configuration according to the invention is very advantageously suitable for luminaires in which a reflector is provided, in particular with opposing reflector side walls which require an associated installation space. If the holding devices are arranged in the region of the edge strip, an enlarged opening is available and a reflector can be arranged in a space-saving and easy-to-install manner.

The luminaire according to the invention can be a surface-mounted luminaire or a

Eiribauleleuchte act that for mounting or installation on or in a carrier, for. B. a wall or ceiling.

The configuration according to the invention is also suitable for a single lamp as well as for a plurality of lamps which have a lamp strip or a so-called lamp or. Form light field.

Radiation of light on the circumference of the cover plate is particularly advantageous if the cover plate has a thickness of approximately 3 to 5 mm and more.

Further subclaims contain features that improve light radiation, enable glare-free light radiation, lead to small, inexpensive to manufacture and easy-to-use and inexpensive configurations, in particular of the base body of the lamp, and to advantageous holding devices, which are also suitable for individual lamps and / or a lamp strip and / or suitable for luminaire or light fields.

The invention and further advantages which can be achieved by means of advantageous embodiments of exemplary embodiments and drawings are explained in more detail below. Show it

Fig. 1 shows a lamp according to the invention in the form of an Eiribauleleuchte in

Cross-section; FIG. 2 shows the detail of the lamp identified by X in FIG. 1 in an enlarged representation;

3 shows a holding device for a cover plate of the lamp in section;

4 shows the cover plate of the lamp in a top view and in a reduced representation;

5 shows a holding device in a modified embodiment;

6 shows the cover plate according to FIG. 5 in a plan view in a reduced view;

7 shows a holding device in a further modified embodiment;

8 shows a light field consisting of a plurality of lamps arranged side by side in a perspective view;

9 shows the detail X in FIG. 1 or Y in FIG. 8 in an enlarged representation;

10 shows the detail X or Y in a modified configuration;

11 shows a lamp according to the invention in cross section in a modified configuration;

Fig. 12, the lamp of FIG. 11 in the bottom view and in a reduced size

Presentation;

13 shows the detail Z shown in FIG. 11 in an enlarged representation;

14 shows a frame profile for the lamp in cross section;

15 shows a front end of the frame profile with a connector device in a perspective view;

16 shows a base inner body in a side view;

17 shows the base inner body in plan view; 18 shows the detail marked ZI in FIG. 16 in an enlarged manner

Presentation;

19 shows the detail identified by Z2 in FIG. 16 in an enlarged representation;

20 shows the base inner body as a prefabricated circuit board;

21 shows a latching pin in a perspective representation;

22 shows a latching bushing for the lamp in the bottom view;

23 the locking bushing in a side view from the left;

24 shows the section XXIV-XXIV in FIG. 22;

25 shows the section XXV-XXV in FIG. 22.

The main parts of the lamp designated in its entirety with 1 are a base support 2 with a base body 3, here in the form of a frame or an upside-down tub, on or on which the holding arms 4 on the opposite side walls 3a extend outwards and outwards can be swiveled in and preferably height-adjustable (not shown), one or more, e.g. B. two, arranged in the interior of the base body 3 lamps 5, here gas discharge tubes, which are detachably mounted on the base body 3 by means of sockets 6, a reflector 7 for the at least one lamp 5, a flat or plate-shaped cover plate 8 with a broad side in the present exemplary embodiment Radiation area 8a, which is dimensioned larger than a radiation opening 9 in the base body 3 of the lamp 1 and thus not only covers the radiation opening 9, but also edge strips 11 at least on opposite edges of the base body 3. In the present exemplary embodiment, the edge strips 11 are formed by edge legs 11a projecting laterally from the free edges of the side walls 3a, whose free edges can be angled by edge legs 11b to stabilize them to the side facing away from the cover plate 8. In this way, an edge region 11c of the base body 9 is formed. It is the purpose of the edge strips 11, an installation gap in one

Cover the installation opening of a ceiling 13, in which the lamp 1 is installed as an Eiribaule lamp, the edge strips 11 overlapping the edge of the installation opening and abutting the underside of the ceiling 13. The cover plate 8 is by at least one Detachable holding device 14 still to be described held on the base body 3, preferably on the edge strips 11.

In the functional operation of the lamp 1 equipped with conventional equipment, the light generated by the lamp or lamps 5 is passed through the radiation opening 9 and at the

Radiated surface 8a radiated into the room to be illuminated. To clarify this radiation light, a resulting main light beam is shown as an arrow and designated by 15.

The lamp 1 or the shape of its radiation opening 9 or its cover 8 can be square, z. B. rectangular or square. In the present exemplary embodiment, the shape of the lamp 1 or its radiation opening 9 is rectangular and elongated, the side walls 3a or the edge strips 11 being located on the long sides. On the narrower end faces there are also opposite side walls 3b, which are connected to the side walls 3a and form the aforementioned tub. In such a case, the luminaire 1 is a single luminaire, the edge strips 11 also being arranged all around on the two other sides, here the narrower transverse sides.

However, the configuration shown in FIG. 1 can also be a row of lamps 1 consisting of a plurality of lamps 1 arranged one behind the other, at the ends of which a lamp 1 with an end-side transverse wall 3b is arranged, while the line between the end-side lamps 1 arranged lights 1 have trough-shaped base body 3 or troughs without transverse side walls 3b. In such an embodiment, the cover plates 8 arranged one behind the other along the row of lights can abut one another at associated butt joints (not shown). The respective base supports 2 and reflectors 7 can also abut one another on the respective butt joint. The installation opening is to be made correspondingly long taking into account the number of lamps 1 arranged one behind the other. Such an embodiment is particularly suitable for tubular lamps 5 in which the lamps 1 have an elongated design.

The or the reflectors 7 consist in a known manner from two opposite and - seen in the longitudinal direction of the lamp 1 - concave rounded reflection walls or a tunnel-shaped reflection wall 16, which in the present exemplary embodiment, for. B. a so-called double lamp or multiple lamp, is present twice or more. The respective reflector 7 or a reflector 7 common to a plurality of lamps 5 is preferably on the base body 3 detachable, attached, as is usual, e.g. B. by means of locking devices (not shown), which allow easy and quick installation and removal through the radiation opening 9.

Between the cover plate 8 and the at least one lamp 5, an inner, plate-shaped cover plate 17 can be arranged and fastened by means not shown, e.g. B. support or at least one locking device, releasably. The cover plate 17 is made of translucent material and serves to influence the light. It can be clear or partially translucent or made of opal material, so that it emits a diffuse light image, whereby zones of different light intensities of the at least one light source are made more uniform and a more uniform and less contrasting light image is emitted onto the cover plate 8. The light image emitted by the cover plate 8 is therefore correspondingly even, even if the cover plate 8 consisting of translucent material consists of clear material. The light image emitted by the radiation disk 8 is even more even if the cover disk 8 consists of partially translucent or opal material. The cover plate 8 can be smooth on its radiation surface 8a or have a structure 8b, in particular a microstructure, as a result of which the light image on the radiation surface 8a becomes more brilliant. The radiation surface 8a can, for. B. be rough or matt. These measures serve to homogenize the light image and to glare the cover plate 8 or the lamp 1. In addition, the flat or plate-shaped cover plate 8 has the due date of a light guide, so that the light not only shines through the cover plate 8 transversely, but in the cover plate 8 is also directed transversely to the main emission direction 15 into the edge regions covering the edge strips 11, so that the light also radiates on the radiation surface 8a in these regions. This also avoids or at least reduces these dark edge regions of the luminaire 1 which are present in the prior art.

Alternatively, the cover plate 8 can also be made of opal white material, preferably pearl diffuser, in particular PMMA.

In addition, the cover plate 8 can also serve to illuminate the peripheral region surrounding it, e.g. B. with a ceiling lamp the surrounding deckery area. This is made possible by the fact that the cover disk 8 also has an emission surface 8c on its circumference or its circumferential surface, on which light emits and contributes to illuminating the surroundings of the cover disk 8 or the lamp 1. The areas covering the edge strips 11 and the light beams emitted in the peripheral area are designated by 15a, 15b. The suitability of the cover plate 8 for guiding the light transversely to the main emission direction 15 increases with increasing thickness of the cover plate 8. Experiments have shown that a ratio of the thickness a of the cover plate 8 to the width b of the covered edge or the edge strips 11 is approximately 1: 3 to 1: 1, preferably approximately 1: 2. With a width b of approximately 12 mm, this results in a thickness a of the cover plate 8 of approximately 4 to 12 mm, in particular approximately 6 mm.

The cover pane 8 preferably consists of clear plastic material, in particular crystal-clear PMMA, wherein it has microprisms at least on its radiation surface 8a. These microprisms are optimized in terms of lighting technology and by known steep inclined surfaces of z. B. pyramids or webs are formed, the inclined surfaces of which form an obtuse angle W of preferably approximately 116.5 °. This ensures that the luminaire is glare-free according to standards (1000 cd / m ² at flat angles greater than 65 ° with respect to the central axis or direction of radiation 15). Below that, the luminaire should emit approx. 4000 cd / m ² . The tips of the pyramids are spaced apart. Such a cover plate 8 can, for. B. up to about 8 mm thick. It appears to be of high quality, particularly in the case of a crystal-clear design, due to its thickness a.

The microstructure can have different shapes. It is also possible to form the microstructure by triangular profile prisms which are formed by elongated furrows which are triangular in cross section, as shown in FIG. 2. The distance c from adjacent peaks or elevations can be approximately 1 mm, and the angle W enclosed by the inclined surfaces of the triangular shape can be approximately 116.5 °.

In the case of a structured radiation surface 8a, reflected light beams 15c emerge from the lateral radiation surfaces 8c, which are directed transversely to the radiation direction 15 or obliquely to the side facing away from the radiation direction 15. This is particularly favorable for illuminating the surroundings, especially in the case of ceiling-mounted egg or ariba lights. The microprism structure according to FIG. 2 is suitable for elongated luminaires 1, in particular when the profile of the triangular structure runs in the longitudinal direction of the luminaire, as shown in FIG. 2. In this case, the surroundings of the lamp 1 are illuminated, which are located on the long long sides and are particularly in need of illumination.

In the following, advantageous exemplary embodiments for a releasable holding device 14 are described, which are preferably one Quick-connect connection, in particular in the form of a magnetic holding device or a latching device.

3 shows a magnetically effective holding device 14 with a plurality of permanent magnets 14a distributed over the circumference, which are each embedded and fastened in recesses 14b of the cover plate 8 which are open at the top, for. B. by gluing. In this configuration, the base body 3 or the edge strips 11 or corresponding, preferably rail-shaped, support parts made of steel are required to ensure the magnetic function.

The permanent magnet 14a can be formed according to FIG. 5 by a thin magnetic strip which is attached to the top of the cover plate 8, for. B. by gluing. This can be a magnetic strip section or a magnetic strip extending over the entire longitudinal dimension of the respective edge, as shown in FIG. 6.

In the embodiment according to FIG. 7, the holding device 14 is formed by a latching device with at least one latching nose 14c, which engages behind a latching collar 4d in the latched position. In the embodiment according to FIG. 7, the latching lug 14c and the latching edge 14d are each formed on an additional component 14e, 14f, of which one component is sunk in the cover plate 8 and the other component 14c is fastened to the edge strip 11, preferably one Fastening hole 14g in the edge strip 11 and axially secured therein. In the present exemplary embodiment, the latching edge 14d is formed by an undercut opening edge of a bush 14h which is inserted and fastened in an upper-side recess in the cover plate 8, for. B. by gluing. The latching lug 14c can be formed on a mandrel which is attached to the edge strip 11, e.g. B. inserted in the mounting hole 14g and locked z. B. is locked by means of the hole parts overlapping flange parts. The mandrel and / or the socket can be made of resilient material such. B. are made of plastic, which ensures the elastic compliance and locking. The mandrel is preferably locked in the fastening hole 14g. The mandrel and the bushing 14h or corresponding components preferably consist of translucent material or the material of the cover plate 8 in order to avoid impairments of the most uniform light image possible.

As shown in FIG. 4 in particular, the holding device 14 can be arranged in the corner region of the cover plate 8. In the case of elongated lamps 1, because of the length present, it is advantageous to have one or more distributed over the longitudinal edge Holding devices 14 must also be provided in the region of the respective longitudinal edge, which is indicated by dashed lines.

In the above-described holding devices 14 in the form of quick-action connections, it is advantageous to provide an additional securing device for the cover plate 8, which at the same time forms a suspension device (not shown) which holds the cover plate 8 in a suspended position on the base body and thus has a distance from the base body 3 3 holds. The securing device can be formed by a preferably centrally arranged or two suspension straps, which are located on one edge of the lamp 1, in particular on a longitudinal edge, at a distance from one another with the lamp 1, for. B. with the associated wall 3a of the base body 3, and the cover plate 8 are connected. In this embodiment, the cover plate 8 is in the suspended state under the associated side edge of the lamp 1. This is for access to the interior of the lamp 1, for. B. to replace the at least one lamp 5, advantageous for reasons of space.

In one embodiment of the microprism structure in the form of in cross section, for. B. triangular, webs and / or furrows, the cover plate 8 can be formed by two stacked or stacked cover plates (not shown), the microstructure of which is rotated by 90 ° to one another. With one

The light distribution is improved, in particular in the region of the edges of the lower cover plate 8, which extend transversely to the profile direction of this microprism structure. This configuration is particularly suitable for individual lights in which the lateral radiation 15b, 15c is desired over the entire circumference. In such an embodiment, holding devices 14 may also be provided with a suspension device between the two cover plates 8. For both cover plates 8, a common suspension device can be provided on a common edge in the sense described above.

The embodiment according to the invention is also suitable for a so-called light field 21 according to FIG. 8, in which a plurality of luminaires 1 are arranged in a cascade shape in one or more rows running side by side or crosswise. These can be built-in lights or also built-on lights.

In the case of a light field 21, the edge strips 11 can be formed by support rails 22, which are likewise parts of a base body and are arranged next to a dividing joint 23 of the light field 21 (FIG. 9). With such a light field 21, the support rails 22 can be part of a support frame, not shown. The supporting frame or the mounting rails 22 can, for. B. attached to a ceiling or z. B. from a blanket, not shown, for. B. by means of suspension cables.

9 shows a mounting rail 22 in an angular or U-shape, with a vertical mounting leg 22a and a horizontal mounting leg 22b, which forms the edge strip 11.

The arrangement according to FIG. 9 also results when a plurality of recessed lights with base bodies 3 are arranged next to one another in order to form the light field 21. In order to clarify this, the corresponding reference numbers of the recessed luminaire are also entered in brackets in these figures. This also applies to Fig. 10.

In the context of the invention it is also possible that a cover plate 8, for. B. due to predetermined dimensions, the respective edge strips 11 only partially covers.

10 shows on the one hand the detail X for an Aribaul lamp with a base body 3, from the side wall 3a of which the edge strip 11 does not extend outwards but inwards, the side wall 3a being able to align vertically with the circumference or associated edge of the cover plate 8 ,

On the other hand, in order to form a light field 21, a plurality of such surface-mounted luminaires can be arranged next to one another in one or in a plurality of rows running crosswise, as illustrated in FIG.

In the case of a light field 21, it is advantageous to have a small one at the dividing joints 23

Distance d from z. B. provide about 1 mm, so that pinches are avoided, which result from dimensional differences in the cover plates 8 or lights 1 from temperature fluctuations. In this embodiment or arrangement, the division joints 23 are illuminated by the light emitted on the narrow side surfaces 8c. In this way, predetermined dark areas, which appear relatively wide due to the relatively small thickness of the cover plate 8, are avoided or reduced by the dividing joints.

The dimensions of the cover plates 8 in the plate extension (length, width) preferably correspond to the dimensions of commercially available ceiling modules, namely preferably 600 mm and / or 625 mm.

The exemplary embodiments according to FIG. 11 and the following show a lamp 1 which can be designed either as a built-in lamp or as a built-on lamp. This lamp 1 can be designed both as a recessed luminaire and as a luminaire except for special differences in accordance with the above-described exemplary embodiments, so that reference can be made to the description of the above-described exemplary embodiments in order to avoid repetition. Identical or comparable parts are provided with the same reference symbols. basics

There are differences with regard to a different configuration of the base body 3 and / or the holding devices 14 for the cover plate 8 and / or the cover plates 8 themselves or an additional light influencing means on the inside of the cover plate 8. The cover plate 8 can be clear or translucent (opal) and be smooth on its radiation surface or have the structures 8b described above.

A first difference of the base body 3 is that between the edge region 11c and the inside of the cover plate 8 there is a free space 31 which extends to a contact part 32 which is arranged on the edge of the cover plate 8 and which is part of the support body 3. The free space 31 is preferably shaped to be convergent towards the edge. In the exemplary embodiment, it is limited by the inside of the cover plate 8 and the preferably flat outer surface of an edge leg 11a facing it. The boundary surfaces include an acute angle W1 of approximately 15 ° to 30 °, preferably approximately 23 °. As already described above

Exemplary embodiment, the edge leg 11a and the edge leg 11b, which is preferably also present, can be connected in one piece to a side wall leg 3al forming the associated side wall 3a, e.g. to have turned away from her.

Due to the presence of the two laterally opposite or on the entire circumference of the free spaces 31, the light emitted by the light source or lamp 5 or reflected by the opposite reflection wall 16 can penetrate substantially up to the edge of the cover plate 8, whereby the outer and / or lateral radiation in the region of the auxiliary light beams 15a and 15b is improved or strengthened. As a result, more light is emitted in the region of the edge of the cover plate 8 and the surrounding area is thereby illuminated, whereby the contrast of the lamp 1 or cover plate 8 to the surroundings and to the central region of the cover plate 8 is reduced.

Another difference is that at least the opposite side walls 3a, preferably also the end walls 3b of the base body 3, are covered and / or stabilized by an externally arranged frame 33, to which the walls 3a, 3b in question are fastened by a releasable fastening device 34 are. In the exemplary embodiment, the frame 33 extends over the entire height h of the base body 3, the frame 33 being able to protrude slightly from the contact part 32 and thus, taking into account an assembly play, can form a surround for the cover plate 8. The projection e is smaller than the thickness of the cover plate 8, preferably smaller than half the thickness.

The fastening device 34 has a web 35, which extends in the circumferential direction of the base body 3, and either a row of holes running in the circumferential direction or a screw channel 36 into or into the cap screws 36a for the indirect or direct fastening of the peripheral walls of the base body 3 to the web 35 can be screwed through corresponding holes in the side or peripheral walls 3a, 3b. In the exemplary embodiment, the web 35 extends obliquely downward and inward to the base inner body 3c, tongues 37 on the opposite wall 3a, 37 being cut out and bent out of the wall in such a position that they are on the end face of the web 35 concerns. A screw 36a can be inserted and screwed through a hole 38 arranged in each of the tongues 37, and its head can rest against the inside of the tongue 37.

The width j of the screw channel 36 is dimensioned somewhat smaller than the outer diameter of the thread of the associated screw 36a. As a result, the thread of the screw screwed into the screw channel 36 is either non-positively due to the clamping effect of the elastically spread fork walls 35a delimiting the screw channel 36 and / or due to a shaping or cutting into the groove walls or fork walls 35a so that the respective screw holds the associated one can apply axial clamping force. A particularly stable fastening is achieved if longitudinal grooves 35b are arranged in the groove or fork walls 35a, the cross-sectional shape of which is identical or similar to the cross-sectional shape of the threaded grooves of the screw 36a.

In the exemplary embodiment, the frame 33 has, on its side SI facing the space R to be illuminated, an edge web 41 which is tapered toward the outside with respect to its width f and preferably terminates on the outside and, in the exemplary embodiment, surrounds the edge legs 11b and preferably partially also the cover disk 8. This creates a recess 42 for the cover plate 8 or the edge region 11c.

The frame 33 can have an S2 arranged on its side facing away from the cover plate 8 and by an edge web 43 which is tapered inward with respect to the width f and which is formed by an outside step recess 45 which is delimited laterally by the outer surface of the edge web 43 and to the room R through a step surface 45a, which preferably extends parallel to the cover plate 8, is limited. The frame 33 thus consists of a frame base body 46, in the width f, from which the edge webs 41, 43 tapering on the side SI, S2 facing and facing away from the space R, from which the edge web 43 facing the system side S2 inwards and that Edge side 41 facing away from the system side S2 is offset to the outside. In the exemplary embodiment, the web 35 extends from the step wall 47 of the frame base body 46 which has the step surface 45a. As can be seen in particular from FIG. 14, the frame 33 has a limiting web 48 which projects inwards from the edge web 41 and delimits the depth of the recess 42 , which projects beyond the width g of the edge web 41 and can thereby form a bottom wall section for the recess 42.

The frame 33 preferably consists of lateral and frontal frame parts which can be connected to one another in the corner regions of the frame 33 and, for example, can be mitered or end at a distance i from the corners of the frame 33 and are connected by corner brackets 49, by means of which the frame shape is completed. The straight extending frame parts 33a are preferably formed by profile pieces, of which the lateral and front profile pieces can have the same or a different length. The corner brackets 49 can also be formed by corresponding profile pieces which are firmly connected to one another in the corners. The legs 3al, 3bl form a base irine body 3c and the frame 33 a base outer body 3d.

The profile pieces P can be produced quickly and inexpensively by extrusion or extrusion. This also applies to the profile sections of the corner bracket 49. However, these parts can also be molded parts which are produced by injection molding. The frame 33 or its parts can be made of metal, e.g. Made of aluminum or plastic.

The frame parts 33a are connected to the adjacent corner brackets 49 by connectors 51, each of which has one or more, in the exemplary embodiment two, fitting pieces 52 which cooperate with sections of the preferably profiled frame parts 33a in such a way that they form-fit an aligned arrangement of two ensure the respective butt joint 53 opposite frame parts 33a or profile sections. At the

In the exemplary embodiment, the profile sections P1, P2 have one or two areas of the profile, preferably facing and facing away from the contact side S2, preferably in cross-section T-shaped longitudinal grooves 53a, 53b, the cross-sectional shape of the fitting pieces 52 and longitudinal grooves 53a, 53b being present in the same number as one another are adapted, for example have the same shape, that the profile sections P1, P2 can be plugged onto the fitting pieces 52 with little movement play. The two existing adapters 52 are preferably connected to one another in one piece by a cross-connecting web 54. The cross-connecting web 54 protrudes at least in the region of the longitudinal grooves 53a, 53b between the opposite ends of the profile sections P1, P2. In order to be able to cover the gap or the gap between them from the outside, the cross-connection web 54 extends over the entire height dimension of the profile, the adapter piece (s) 52 and the cross-connection web 54 forming the connector 51. In the exemplary embodiment, the cross-connection web 54 is of T-shaped cross-section with a cover web 55a and an inner web 55b so that in the plug-in connection position the cover web 55 rests on the outside of the profile sections P1, P2 and the inner web 55b fits between the end faces. The cross-connecting web 54, the cover web 55 and the inner web 55b are shaped such that they follow the outer shape of the profile sections Pl, P2, the cross-connecting web 54 projecting into the butt joint between the profile sections Pl, P2, for example by the amount of the outer wall thickness k. In the exemplary embodiment, the cover web 55 extends on the outside in a Z-shape and on the room side SI facing away from the contact side, so that the profile joint 56 is covered from the visible sides. The cohesion in the longitudinal direction of the profile or in the circumferential direction of the frame 33 is achieved by the profile sections P1, P2 through the attachment to the base inner body 3c.

If the inner body 3c is trough-shaped, it can be bent from a plate P3, preferably from sheet metal, and thus be a stamped and bent part (FIGS. 17 and 20). In the corners of the board P3 there are cutouts 57, parallel to the

Inner cutting edges 58a, 58b which run on peripheral edges and which are followed by cutting edges 58c, 58d which are offset in a Z-shape. In order to form the inner body 3c, the board P3 is bent to the broad side at the bending lines indicated by dash-dot lines into a shape which can be seen from FIGS. 13 and 18, the bending lines 61a running in the peripheral edges of the hollow box-shaped inner body 3c, the bending lines 61b run in the foot area of the edge leg 11a and the bending lines 61c run in the foot area of the edge leg 11b. The cut edges 58a, 58b run in the peripheral edges of the hollow box-shaped inner body 3c, which extend between the contact side S2 and the room side SI. The oblique cut edges 58e run in the miter of the edge area 11c, and the cut edges 58c, 58d run in the corner edges of the edge areas 11c.

The U-shaped incisions 37a forming the tongues 37, including the associated holes 38, are prefabricated in the board P3. Bending the tongues 37 can take place before, during or after the bending of the inner body 3c from the board P3.

Further cutouts 62 are formed in the board P3 in the corner areas or in the vicinity of the corner areas in the edge areas forming the side wall legs 3al with inner projections 62a lying opposite in the longitudinal direction of these edge areas, which e.g. Extend over the entire height of the side wall leg 3al and into the ceiling wall section 3e. In these cutouts 57 in the older German utility model 298 19 888 described the height adjustment of the lamp 1 serving and for simplicity not shown attachments with height-adjustable holding arms 4 can be mounted, which overlap the edge of the ceiling 13 with a recessed light. To avoid repetition, please refer to utility model 298 19 888.

Furthermore, further slot-shaped or T-shaped cutouts 63 are arranged in the mutually opposite side edge regions of the circuit board P3 or in the side wall limbs 3al, which cutouts serve for mounting by holding elements of the holding device 14 to hold the cover plate 8. In the exemplary embodiment, the holding device 14 is formed by a latching device 64, with a latching pin 65 which can be latched by movement from the room side SI with at least one latching element assigned to the base body 3, here the inner body 3c. This locking device 64 is designed on the basis of at least one spring-elastic locking element in such a way that when the locking pin 65 is inserted the locking element automatically dodges and snaps into place. To release the locking device 64 by a manual pulling force

Locking pin 65 can be pushed over, i.e. by exerting a manually exertable tensile force on the locking pin 65, the locking elements evade automatically, the locking being released. In the exemplary embodiment, the latching pin 65 shown in FIGS. 13 and 21 has one or two latching recesses 67 arranged opposite one another in its front end region, which rounded or inclined insertion surfaces 67a can be arranged upstream. The at least one latching recess 67 has an oblique or rounded execution flank 67b, which enables the above-described overpressing of the latching device 64 when releasing.

The at least one latching recess 67 interacts with at least one latching projection 68 which resiliently transversely to the latching pin 65 and which preferably has divergent and convergent insertion or execution surfaces and which is held on the inner body 3c, preferably in a latching bushing 66 Exemplary embodiment, two opposing locking recesses 67 are arranged in a round locking pin 65 which, starting from a pin head 69, has a first pin section 71a which is inserted with the pin head 69 in a stepped hole 72 of the cover plate 8 from the room side SI. The first pin section 71a is followed by a second pin section 71b, in which a securing element 74 for the cover plate 8 is preferably arranged in one piece, which in the exemplary embodiment is formed by an elastically bendable spreading arm which extends obliquely outwards to the pin head 69 and which in the case of Inserting the locking pin 65 into the stepped hole 72 is automatically elastically bent and springs out behind the cover plate 8 into a position engaging behind it, thereby preventing the cover plate 8 from lifting off from the pin head 69.

There are two possibilities for releasing the locking device 64. In a previously described overpressable embodiment, the latching device 64 can be overpressed by the certain manual effort. Instead of such a configuration, it is also possible to bring about an unlatching in that the locking pin 65 by z. B. is rotated about 90 °, whereby the at least one latching projection 68 is urged against its elastic restoring force into a position adjacent to the circumference of the latching pin 65, in which it is located outside the latching recess 67, so that the latching can be released by axial movement ,

In the exemplary embodiment, two securing elements 74 arranged opposite one another and / or two latching recesses 67 and two resilient latching projections 68 are provided. The spreading arm or arms can be deflected in lateral recesses 75 in the second pin section 73b. To rotate the locking pin 65, it has a rotating element on its free head surface, e.g. a slot to which a manually rotatable turning tool fits, e.g. a screwdriver. The locking pin 65 is preferably made of a clear material, in particular plastic, and it is an injection molded part.

The locking bushing 66 is preferably formed by a hollow body, in the cavity of which the one or the two opposing locking projections 68 are arranged such that they can be elastically rebounded. As shown in FIG. 25, the latching projection 68 can preferably be arranged in one piece on spring arms 76 which, for. B. U-shaped base parts 77, which are preferably connected by a plug connection to the locking bush 66 and each be firmly inserted into a plug-in recess of the locking bush 66 can. 25, the base parts 77 each form a U-shape with the spring arms 76. As shown in FIG. 24, in which the locking bush 66 is in its installation position in the case of a ceiling light, the base parts 77 are inserted into the plug-in recesses (not shown) from the room side SI. The locking parts each formed by a locking projection 68, a spring arm 76 and a base part 77 are preferably made of plastic, which in this case can also be plastic injection molded parts.

The latching bush 66 has on its outside a clip 78 which can be seen in FIG. 22 and which preferably extends parallel to the outside of the latching bush 66 carrying it from one end to the opposite side of the latching bush 66 or ends before it. The size of the clasp 78 is dimensioned so large that it can be inserted into the associated cutout 63, with this displacement of the side wall legs 3al entering the gap 79 between the clasp 78 and the adjacent peripheral wall of the latching bushing 66 and thereby possibly through the clasp 78 can be clamped if it is resilient. A web 81 can preferably be arranged in one piece between the foot region of the clasp 78 and the latching bushing 66, which preferably extends convergingly in the direction of the free end of the clasp 78 and can be inserted into the central section 63a of the cutout 63, with a wedge-shaped configuration preferably also the middle section 63a can be clamped therein.

11 and 13 show, the locking bush 66 is seated with its outside on the side wall leg 3al and with its underside 82 on the wall 7a of the reflector 7, which extends straight or curved obliquely upwards. The bottom 82 of the

Locking bushing 66 forms with the outer side surface of the locking bushing 66 the angle W1, which also includes the reflection surface 7a with the side wall leg 3al. If the reflector 7 is fastened to the side wall leg 3al with an upwardly angled edge leg 7b, the edge web 7b can have a recess (not shown) in which the latching bushing 66 is arranged, or that at the points at which a latching bushing 66 is arranged Cutout 63 can also be formed in the edge web 7b, the clasp 78 engaging over the edge web 7b and the side wall leg 3al. For the passage of the locking pin 65, a through hole is provided in the area of the respective locking bush 66 and reflector wall 7a, into which the locking pin 65 can be inserted with play. In order to facilitate insertion, the free ends of the latching pins 65 are designed to be convergent, in particular conical. The base inner body 3c can serve the holding ring of one or more cover disks 8, which can be arranged in one or two rows arranged next to one another, preferably extending parallel to the side wall legs 3al, or rows extending crosswise. As shown in FIG. 11, two cover plates 8 or two rows of cover plates 8 can be arranged next to one another. 16 and 20 show, four cover disks 8 (shown by dash lines in FIG. 20) can be arranged in two crosswise rows. Each cover plate 8 is held on the associated side wall limbs 3al with two holding devices 14 or latching devices 64 arranged at a distance from one another, preferably in the corner regions of FIG

Cover plates 8. The cutouts 63 for holding the latching bushings 66 are provided at corresponding points in the side wall legs 3al. 16 and 20 also show that cutouts 63 and locking bushings 66 belonging to a cover plate 8 can be formed and arranged in mirror image to one another. In the area of the front wall legs 3b 1, no mounting elements for the cover disks 8 are provided. In the area of their corners facing the center, the cover disks 8 can be held by holding devices 14 or latching devices 64, as have been described for the lateral outer areas, with a middle holding part, not shown, e.g. B. with the cutouts 63 corresponding cutouts, arranged and z. B. can be attached to the ceiling wall 3e. Locking devices 64 with locking pins 65 can also preferably be used for this purpose, as is indicated in the middle area in FIG. 11. As also shown in FIG. 20, two or more fastening elements, here incisions 37a, can be provided for holding devices 14 over the length of the side wall legs 3al, e.g. B. between two cutouts 63.

Fig. 12 shows an example that a frame 33 can be provided for one or more inner bodies 3c, which, for. B. can be arranged in a longitudinally extending to the side wall legs 3al row.

In the context of the invention, one or more, here by lamps 5 or z. B. fluorescent tubes, light sources can be arranged, the lamp 1 being a single lamp or a double lamp, as shown in FIGS. 1 and 11, or a multiple lamp. Depending on the size of the base body 3 or inner body 3c, one or more cover disks 8 can be arranged adjacent to one another in one or more rows next to one another at dividing or butt joints 23. In the exemplary embodiment according to FIG. 12, two rows of cover disks 8 are provided, which are each centered on the associated light source 5. 11 and 13 further show, instead of the second cover plate 17 or in addition to the cover plate 17, a film 83 can be arranged on the inside of the cover plate 8. Such a film 83 is preferably concerned, the light transmission of which is lowest in the central region, namely in the region upstream of the associated light source 5, and increases continuously with increasing distance from this central region. This can e.g. B. can be achieved in that the film 83 is partially translucent (opal) or partially reflective, the degree of light transmission or partial reflection increases with increasing distance from the light source 5. The degree of light transmittance is preferably selected such that the light image resulting on the radiation surface 8a during functional operation is substantially uniform. This also improves the luminance of the light impinging on the cover plate 8 in the sense of an equalization, preferably more evenly, and reduces the brightness contrast or difference. The film 83 can be placed on the cover plate 8 or at a distance from it. If there are a plurality of cover disks 8 arranged next to one another, a film 83 common to all cover disks 8 or a film 83 in each case can be provided. For the passage of the locking pins 65, 83 through holes are provided in the film or films.

In Fig. 11 are three hatched areas F, longitudinally and internally on the side walls 3 a and optionally in the middle extending free spaces are available, in the area of which electrical operating devices for the electrical connection of the at least one light source 5 z. B. can be arranged on the ceiling wall 3e or on the end walls 3b.

Claims

Expectations

1. lamp (1) with a base body (3) for receiving at least one

Light source (5), with an edge area (11c) on the base body (3) facing the space (R) to be illuminated and with a light-transmitting cover plate (8) directed towards the space (R) to be illuminated, which covers the edge area (11c) seen from the room (R) to be illuminated - at least partially covered, characterized in that the base body (3) and the cover plate (8) only converge at the edge of the cover plate (8) and form a free space (31) within the edge, of direct light from the light source (5) to

Edge of the cover plate (8).

2 Luminaire according to claim 1, characterized in that the cover plate (8) opposite edge surface of the edge region

(11c) extends convergingly, preferably obliquely, towards the edge of the cover plate (8).

3. Luminaire according to claim 1 or 2, characterized in that the wall (7a) of a reflector (7) ends at the inner edge of the edge region (11c) and preferably an extension of the reflection surface (7a) with the surface of the cover plate (8) facing Edge region (11c) is substantially aligned and or directed towards the edge of the cover plate (8).

4. Lamp according to one of the preceding claims, characterized in that the edge region (11c) is formed by an edge leg (11a), which preferably starts at an obtuse angle from a side wall leg (3al) of the base body (3).

5. Luminaire according to spoke 4, characterized in that the edge region (11c) with the side wall leg (3al), the edge leg (3a) and a second edge leg (11b) is U-shaped at the free edge of the first edge leg (11a).

6. Luminaire according to one of the preceding claims, characterized in that the base body (3) is formed from an inner body (3c) and an outer body (3d), which are connected to one another, in particular screwed.

7. Lamp according spoke 6, characterized in that the edge region (11c) overlaps the outer body on its side facing the space to be illuminated (R) and is supported thereon.

8. Lamp according to one of the preceding claims, characterized in that the cover plate (8) by a holding device (14) detachably with the

Base body (3) is connected, which is preferably on the inside of the edge area

(11c) is arranged.

9. Light according to one of the preceding claims, characterized in that the holding device (14) is formed by a latching device (64).

10. Luminaire according to claim 9, characterized in that the latching device (64) has at least one latching recess (67) and at least one latching projection (68) which on a from the inside of the cover plate (8) projecting latching pin (65) and the base body (3) are arranged, the latching device (64) preferably being able to be manually overpressed for releasing.

11. Luminaire according to claim 10, characterized in that the latching device (64) has a preferably detachably attached to the base body (3) latching bushing (66) into which the latching pin (65) engages.

12. Luminaire (1), with a base body (3) for receiving at least one light source, with an edge strip (11) facing the space to be illuminated on the base body (3), and with one of the base body (3) and against the Translucent cover plate (8) directed towards the room to be illuminated, characterized in that the cover plate (8) - viewed from the room to be illuminated - is placed on the edge strip (11) of the base body (3) and is large enough to cover the edge strip ( 11) at least partially covered.

13. Luminaire according spoke 12, characterized in that the base body (3) has the shape of a channel or trough and the edge strip (11) from two opposite or from all side walls (3a) protrudes outwards or inwards

14. Lamp according spoke 13, characterized in that the thickness of the cover plate (8) is at least about 1/3 of the width (b) of the edge strip (11), preferably at least about 4 mm.

15. Luminaire according to one of the preceding claims, characterized in that the cover plate (8) by at least two opposite edges of the cover plate (8) effective

Holding devices (14) is detachably connected to the base body (3), in particular to the edge strip (11).

16. Lamp according spoke 15, characterized in that the holding devices (14) are each formed by a magnetically effective holding device or by a latching device.

17. Luminaire according to one of the preceding claims, characterized in that the cover plate (8) also guides the coupled light transversely to the main emission direction (15).

18. luminaire according to address 17, characterized in that the cover plate (8) also emits light on its narrow side surfaces (8c).

19. Lamp according to claim 17 or 18, characterized in that the cover plate (8) consists of translucent (opal) material.

20. Luminaire according to one of claims 17 to 19, characterized in that the cover plate (8) on its radiation surface (8a) has a structure (8b), in particular a microstructure.

21. Lamp according spoke 20, characterized in that the cover plate (8) consists of clear material.

22. Lamp according to one of the preceding claims, characterized in that the cover plate (8) consists of plastic, for. B. methacrylate or

PMMA.

23. Luminaire according to one of the preceding claims, characterized in that on the inside of the cover plate (8) a cover plate (17) is arranged, which emits a diffuse light image, preferably made of translucent material.

24. Luminaire according to one of the preceding claims, characterized in that a plurality of lamps (1) arranged next to one another form a light field (21).