EP0684425A2 - Luminaire comprising at least a light source - Google Patents

Abstract

The ring shaped fluorescent tube(1) is encircled toroidally by both reflector parts(4,5). Several anti-glare elements(3) are fixed at a distance to each other essentially the fluorescent tube(1), with one end respectively at one of reflector parts(4,5), whilst the other end of the respective anti-glare element projects freely. The inner end of the anti-glare element(3) is arranged essentially at the height of the fluorescent tube(1) at the inner reflector part(4). The end of the anti-glare element(3) fixed at the reflector(2), is fitted at the inner reflector part(4). <IMAGE>

Description

The invention relates to a luminaire with at least one lamp and a reflector system assigned to the lamp and made up of at least two reflector parts, the reflector system consisting of a circumferential outer and concentrically arranged circumferential inner reflector part, and a plurality of shielding elements being provided.

Such lights are widely used in the prior art and are commonly known as "turbo grids". The reflector system consists of an inner and outer reflector, which are connected to each other via shielding elements that extend radially to the axis of the lamp. The dimming properties of such a luminaire are essentially good, but the costs for realizing such a dimming are relatively high.

It is the object of the present invention to provide a luminaire of the type mentioned at the outset, which comprises a simply designed dimming system which is inexpensive to produce.

This object is achieved in that a plurality of shielding elements are fixed at a distance from one another with one end each to a reflector part, while the other ends of the shielding elements project freely and are at a distance from the other reflector part.

So far, only anti-glare elements were known in the prior art, which extended from the inner to the outer reflector wall. The one-sided suspension of the anti-glare elements has the particular advantage that only the inner reflector part has to be provided with fastening points for the anti-glare elements. After mounting the shielding elements on the inner reflector part, the inner reflector part is fitted into the outer reflector part. The material and manufacturing costs are thereby reduced without any appreciable weakening of the dimming properties.

In a preferred embodiment, the end of the shielding elements attached to the reflector is attached to the inner reflector part. As a result, it is only necessary, for example, when changing the illuminant later, to remove the inner reflector part with the shielding elements arranged thereon from the rest of the illuminant in order to have access to the illuminant. Furthermore, inner reflector parts with a wide variety of shielding elements can be inserted into an otherwise constant lamp body. The invention has now furthermore achieved that, when using annular reflector parts and several shielding elements which do not reach the outer reflector part, the false radiation passing the shielding elements in the vicinity of the outer reflector part is very low and emerges at such an angle that the dimming properties of these non-continuous dimming elements is not adversely affected.

In a preferred embodiment, the outer reflector part is formed by an essentially concavely curved ring in the direction of the illuminant, while the inner reflector part is formed by a smaller ring provided with an inner surface concavely curved in the same direction as the outer reflector part. The inner reflector part can thus be used as a downlight reflector, which does not have to be provided with shielding elements and possibly contributes to the emission of the main luminous flux component.

The illuminant can preferably be formed by compact fluorescent tubes. These are preferably arranged laterally at the upper end of the reflector system and are largely symmetrically grouped around the center axis of the reflector system.

In order to convert the light rays emerging horizontally at a flat angle into diffuse radiation, the shielding elements can be arranged essentially radially to the central axis of the reflector parts. The shielding elements are advantageously each offset by 5 to 300, preferably 15 °, around the central axis of the reflector parts. The uniform arrangement of the dimming elements also results in a uniform dimming.

In order to keep the mass of the anti-dazzle elements relatively low, they can essentially have a lamella shape, since in order to fulfill a desired anti-dazzle characteristic, e.g. with opaque material, the height is more important than the thickness of the anti-glare elements.

In a preferred embodiment, the inner and outer reflector parts each have essentially the shape of a cycloparabic section in cross-section, whereby largely optimal reflection conditions are provided.

Furthermore, the shielding elements can advantageously be arranged starting from the inner reflector part in the direction of the outer reflector part at a downward inclined angle.

In order that the dimming values required by the standard are achieved in particular, the length of the dimming section arranged within the reflector system is approximately between 0.6-0.9 times the exit width between the inner and outer reflector parts of the reflector.

In a further embodiment, a few shielding elements are arranged on the free ends of spring locking elements, which are resiliently engaged with the outer reflector part. This configuration offers the possibility of the inner reflector part on the outer reflector part at only a few points ten releasably to arrange, so that the inner reflector part is still very easy to remove from the lamp. Due to this simple attachment, it is not absolutely necessary to provide more complex fastening mechanisms for the inner reflector part in the region of the illuminant.

The proportions and arrangement of the two reflector parts relative to one another can advantageously be such that 50 to 80% and 20 to 50% of the total luminous flux are directed outwards by the inner reflector and the outer reflector.

A relatively inexpensive variant consists in that at least the inner reflector part and the shielding elements are made of plastic coated with a reflective layer. A more complex and expensive manufacture from metal can be omitted with this variant. However, there is also the possibility of arranging the shielding elements with a common ring which can be placed on the outside of the inner reflector part and with which they are fastened. They can then preferably be produced together with this from plastic coated with a reflective layer. This configuration is particularly desirable when very high reflection requirements are expected from the inner reflector part, so that it can continue to be produced separately from the anti-glare elements from a material with better reflective properties than the anti-glare elements. For this reason, at least the inner reflector part can be made from a metal ring.

So that the dimming effect begins as close as possible to the lamp, the dimming elements are preferably arranged on the upper region of the inner reflector part.

Furthermore, the inner reflector part can protrude horizontally downward from the outer reflector part, as a result of which the luminous flux component passing through the inner reflector part can be more strongly bundled.

In a further particularly advantageous embodiment according to the present invention, the lamp can have at least one ring-shaped lamp. The reflector is then further formed in two parts and consists of a circumferential outer and a circumferential inner reflector part arranged concentrically thereto, the illuminant being surrounded in a toroidal manner by both reflector parts. This configuration confirms that the present invention is suitable for all circular lamp concepts, be it with ring-shaped lamps or straight lamps.

In order to intensify the dimming effect, the inner end of the dimming elements can be arranged essentially at the height of the illuminant on the inner reflector part, so that the main part of the luminous flux component which hits at least the inner reflector part has already been subjected to the dimming effect of the dimming elements.

A ring lamp, e.g. used in the form of an annular fluorescent tube. The use of a single illuminant reduces the number of electrical connections required.

The reflector parts can be connected to one another essentially in the area above the fastening points of the shielding elements. Each reflector part thus represents an easy-to-produce profile that is only connected to the other reflector part to form the annular reflector.

In particular, the inner and outer reflector part can be concavely curved with respect to the illuminant. Such a curvature makes it possible for the focal points of the cycloparabic sections to lie on the outer circumference of the lamp.

The shielding elements can advantageously be essentially crescent-shaped, which has the advantage that the reflector aperture is as narrow as possible and that the largest possible proportion of the radiation already arriving within the desired radiation area can emerge unhindered. The inner end of the shielding elements can be attached to the inner reflector part essentially at the height of the illuminant, so that the view of the lamella retaining ring at a flat angle is avoided.

Furthermore, the upper and lower edge of the crescent-shaped shielding elements can each have circular arc segments, the respective center points of which lie on a common axis which essentially runs through the connecting line.

The functionality of the lamp can be increased by the area delimited by the outside of the inner reflector part as an accessory space for arranging and accommodating cover elements, e.g. Ceiling panels and / or additional lighting components, e.g. Downlights, spotlights and / or building components, e.g. Sprinklers, speakers, air conditioning / ventilation systems can be used.

Furthermore, protection should be sought separately for a luminaire with at least one ring-shaped lamp, an essentially ring-shaped, multi-part reflector assigned to the lamp and a region essentially delimited by the inner outside of the reflector, which is used as an accessory space for arranging and accommodating in particular lighting components can be used, esp Special according to one of claims 1 to 12. In this luminaire, openings are arranged in the inner reflector part, through which light emitted by the illuminant enters the accessory space and emits into the free space through a lower opening in the accessory space. With this embodiment, part of the luminous flux is branched off into the accessory space, which is then radiated proportionately through the lower opening into the space to be illuminated. As a result, a separate light source for lighting components installed in the center can be dispensed with. Conveniently, the lower opening of the accessory room can be at least partially covered by a lamp glass.

A particular advantage is when the lamp glass is a diffuse glass pane. The strongly directed radiation from the main reflector is then overlaid with a soft diffuse radiation. The shimmering of this pane ensures that the luminance contrast between the luminaire and the surroundings is at a comfortable level and reduces glare. The viewer is visually symbolized where the light comes from and the lamp thus serves as a substitute for the sky. This is particularly emphasized by the combination of directed light and diffuse light, which is also a characteristic of daylight.

The openings are preferably arranged essentially at the same height as the illuminant, in order to introduce the greatest possible proportion of radiation into the accessory space. This is also reinforced by the fact that the openings can each be arranged between the shielding elements.

The efficiency can be increased in that at least one reflector component is arranged in the accessory space, which deflects light emerging from the openings onto the lamp glass. Preferably, a truncated cone-shaped reflector is arranged in the accessory space essentially coaxially to the lamp axis as the reflector component, the outer surface of which is essentially curved in order to allow the light to strike the lamp glass as evenly as possible.

In a further preferred embodiment, the anti-dazzle elements can essentially be designed as prismatic lenses. Appropriately designed lenses can also achieve very good light characteristics in this embodiment. In particular, all shielding elements can be formed together by an annular lens which has corresponding prismatic recesses at least on its underside. The manufacturing and assembly effort can be significantly reduced by this training.

The prismatic recesses are advantageously triangular in cross section in order to achieve suitable dimming properties. On the other hand, the ring lens can be essentially flat on its upper side.

It is particularly favorable for the introduction of light rays into the accessory space if the ring lens engages at least partially with its inner edge in the openings, and thus some of the light rays are guided through the lens into the accessory space.

In order to introduce the largest possible luminous flux into the accessory space and also to simplify the shape of the ring lens, an annular opening can be provided in the inner reflector part, in which the inner edge of the ring lens engages.

In a further advantageous embodiment, the shielding elements can be designed in the form of a grid. In this context, all possible grid shapes are conceivable, e.g. Polygon and round shapes. Grids have also proven themselves as anti-glare elements.

So that the largest possible area is covered below the lamp, the grid can be formed in one piece.

The grid is advantageously constructed from a plurality of essentially cylindrical cell bodies with essentially central light passage openings. Advantageously, the cell bodies are each arranged in a row on partial circles that run concentrically to the lamp axis in order to achieve a relatively regular structure of the grid.

Furthermore, the anti-glare properties of the grid are improved in that the diameters of the cell bodies and the respective light passage openings increase outwards from pitch circle to pitch circle. It also has an advantageous effect if the heights of the cell bodies and the respective light passage openings increase outwardly from pitch circle to pitch circle.

So that the attachment point on the inner reflector part can be arranged as close as possible to the height of the illuminant, the cell bodies of different partial circles are at least partially offset in height from one another.

The efficiency can be increased in particular in that the inner surfaces of the light passage openings are curved, so that the diameter of the light passage opening is smaller at the upper end of the cell body than at the lower end.

Advantageously, the anti-dazzle elements can be arranged on a substantially circumferential support ring which is attached to the inner reflector part. This means that all dimming elements can be attached to the reflector in a single operation.

Furthermore, the openings can be arranged in the support ring, as a result of which the reflector only requires a geometrically simple ring recess for fitting the support ring.

• Fig. 1 eine perspektivische Ansicht einer in einer Decke eingebauten ersten Ausführungsform der erfindungsgemäßen Leuchte,
• Fig. 2 die Leuchte aus Fig. 1 in einer perspektivischen Darstellung von einem Bezugspunkt unmittelbar unter der Leuchte gesehen,
• Fig. 3 das innere Reflektorteil der Leuchte aus Fig. 1 in verkleinerter perspektischer Darstellung,
• Fig. 4 eine Schnittdarstellung des inneren Reflektorteils aus Fig. 1
• Fig. 5 einen Vollschnitt einer zweiten Ausführungsform der erfindungsgemäßen Leuchte,
• Fig. 6 die Hälfte einer Unteransicht der Leuchte aus Fig. 5,
• Fig. 7 die Reflexion zweier fiktiver Lichtstrahlen bei der in den Figuren 5 und 6 dargestellten Leuchte,
• Fig. 8 einen Vergleich zwischen Linearleuchte und erfindungsgemäßer Leuchte in einer Unteransicht,
• Fig. 9 einen Querschnitt durch den erfindungsgemäßen Reflektor,
• Fig. 10 einen Querschnitt durch eine vergleichbare Linearleuchte, die den gleichen Reflektorquerschnitt aufweist,
• Fig. 11 eine schematische Querschnittsdarstellung einer zweiten Ausführungsform der vorliegenden Erfindung,
• Fig. 12 eine schematische Unteransicht eines Teilausschnittes einer zweiten Variante eines Abblendelementes in Form einer prismatischen Linse,
• Fig. 13 die prismatische Linse aus Fig. 12 entlang der Linie IX-IX geschnitten und in die erfindungsgemäße Leuchte eingebaut,
• Fig. 14 die prismatische Linse aus Fig. 12 entlang der Linie X-X geschnitten,
• Fig. 15 eine Ansicht der prismatischen Linse aus Fig. 12 von der Richtung XI aus gesehen,
• Fig. 16 eine Unteransicht einer weiteren Variante von in der Leuchte eingebauten Abblendelementen in einer Teilansicht und
• Fig. 17 die Leuchte gemäß Fig. 16 entlang der Linie XIII-XIII geschnitten.

In the following, embodiments of the present invention are explained with reference to a drawing. It shows:

• 1 is a perspective view of a first embodiment of the lamp according to the invention installed in a ceiling,
• 2 is a perspective view of the luminaire from FIG. 1 seen from a reference point directly below the luminaire,
• 3 shows the inner reflector part of the lamp from FIG. 1 in a reduced perspective representation,
• 4 shows a sectional illustration of the inner reflector part from FIG. 1
• 5 shows a full section of a second embodiment of the lamp according to the invention,
• 6 shows half of a bottom view of the lamp from FIG. 5,
• 7 shows the reflection of two fictitious light beams in the luminaire shown in FIGS. 5 and 6,
• 8 shows a comparison between linear lamp and lamp according to the invention in a bottom view,
• 9 shows a cross section through the reflector according to the invention,
• 10 shows a cross section through a comparable linear lamp which has the same reflector cross section,
• 11 shows a schematic cross-sectional illustration of a second embodiment of the present invention,
• 12 is a schematic bottom view of a partial section of a second variant of a shielding element in the form of a prismatic lens,
• 13 shows the prismatic lens from FIG. 12 cut along the line IX-IX and installed in the lamp according to the invention,
• 14 shows the prismatic lens from FIG. 12 cut along the line XX,
• 15 is a view of the prismatic lens from FIG. 12 seen from the direction XI,
• 16 is a bottom view of a further variant of shielding elements installed in the lamp in a partial view and
• Fig. 17 cut the lamp of FIG. 16 along the line XIII-XIII.

A first embodiment of the present invention is explained in more detail below with reference to FIGS. 1 to 4.

The embodiment shown in the figures comprises lighting means 1 in the form of three linear compact fluorescent tubes, a reflector system 2 assigned to the lighting means 1 and several shielding elements 3 arranged essentially within the reflector system 2. The reflector system 2 consists of an inner reflector part 4 and an outer reflector part 5, which are each concavely curved with respect to the central axis 10 and have an annular shape. The reflector parts 4, 5 have essentially the shape of a cycloparabic section in cross section. The inner reflector part 4 essentially has the shape of a downlight reflector and is used to transmit the majority of the luminous flux in the range of approximately 50 to 80%, which is guided through the reflector system 2 to the outside.

At regular intervals, lamellar shielding elements 3 are arranged on the inner reflector part 4, each of which has a spherically curved upper and lower edge 7, 8 and are directed downwards at an angle from the inner reflector part 4 in the direction of the outer reflector part 5. The shielding elements 3 can be attached to the inner reflector part in a wide variety of ways. In the embodiment shown, the anti-dazzle elements are produced together with a supporting ring 41 connecting them from a plastic by injection molding, which can then be treated on its surface. The highly reflective inner side 42 of the inner reflector part 4 is formed by a correspondingly shaped pressed aluminum part 43. The support ring 41 is adapted to the surface of the upper end region of the aluminum pressing part 43 and can be placed thereon with a precise fit. The support ring 41 is fixed at the bottom by the shape of the metal ring 43 and at the top by a bent peripheral edge portion 44. So that the lower region of the inner reflector part 4 has a uniform surface finish on the outside, one is also on the lower region of the inner reflector part 4 the outer surface adapted reflector cover 45 is provided. This can also be made from a plastic by injection molding and then coated with a reflective layer. The reflector cover 45 can be held by a circumferential ring 46 and a corresponding configuration of the lower edge region of the reflector cover 45. Furthermore, the reflector cover 45 and of the support ring 41, corresponding cover areas 47 may be provided at their connection point.

As can be seen from the drawings, three shielding elements 3 each have at their free ends a spring locking element 48 with a spherical locking head 49, which can be snapped into corresponding receptacles on the outer reflector part 5. It should be emphasized that only the spring catch elements 48 of these three shielding elements 3 are in contact with the outer reflector part 5.

The shielding elements 3 are each offset 15 around the central axis 10 of the reflector system 2. The cross-section of the lamellar shielding elements 3 can have a rectangular shape or a trapezoidal shape with preferably curved side edges. The side surfaces of the anti-glare elements 3 are preferably matted.

The length L of the anti-glare element section arranged on the inner reflector 4 is approximately between 0.6-0.9 times the exit width A formed by the space between the inner reflector 4 and outer reflector 5. The free end of the anti-glare elements 3 is based on the contour of the outer reflector part 5 .

The outer reflector part 5 also has a circumferential collar 15, which serves as a cover element in the ceiling fastening, as will be described in more detail below in a further exemplary embodiment. The attachment of such a lamp is also described below.

So that the main luminous flux component, which is guided downward by the inner reflector part 4, can be bundled more strongly, the inner reflector part 4 can also project beyond the lower edge of the outer reflector part 5. It can be seen that only a luminous flux component of the order of 20 to 50% passes through the opening between the inner and outer reflector parts 4, 5 and is dimmed by the shielding elements 3.

For the sake of completeness, it should be mentioned that the inner reflector part 4 together with the shielding elements 3 can consist of metal or of vapor-coated plastic, in particular acrylic. However, a variant is also conceivable in which the upper half is made of vapor-coated plastic and the lower half is prismatic. Instead of plastic, it is also possible to use glass.

In addition, instead of the lamella shape of the shielding elements 3, other forms of shielding options, such as Prisms.

The two-part design of the reflector system 2 with fixed connection of the shielding elements 3 to only one reflector part 3 offers considerable advantages when replacing the illuminant, since the entire reflector system 2 no longer has to be removed. Furthermore, this measure makes it possible to replace a suitable, but nevertheless differently designed, inner reflector part 4 with shielding elements 3, which may be of a different type, against an already used inner reflector part 4 at any conceivable time.

The embodiment of the present invention shown in FIGS. 5 and 6 essentially comprises an annular illuminant 1 in the form of an annular fluorescent tube, an annular reflector 2 assigned to the illuminant 1 and a plurality of shielding elements 3 arranged essentially within the reflector. The annular reflector 2 consists from an inner and an outer, with respect to the lamp 1 concavely curved, annular reflector part 4, 5. The reflector parts 4, 5 have in cross-section essentially the shape of a cycloparabic section, which are connected to one another in the area above fastening points of the shielding elements. As can be seen in particular in FIG. 5, the reflector 2 can change into an involute shape on both sides in the area above the illuminant, so that the light beams are not reflected back into the illuminant 1 in this area.

The reflector 2 can be divided in the reflector cross-sectional axis 6. However, an asymmetrical division in the area above the fastening point 9 of the shielding elements 3 is preferred, so that the outer reflector part 5 covers a larger cross-sectional area than the inner reflector part 4 and the inner reflector part 5 together with the shielding elements 2 can be removed from the lamp with little effort .

On the inner reflector part 4, lamellar shielding elements 3 are arranged at regular intervals, each having an arc-shaped upper and lower edge 7, 8, the centers of the arcs lying on the reflector cross-sectional axis 6, so that the shielding elements 3 have essentially a sickle shape. The shielding angle should advantageously be constant over the entire anti-dazzle area. The fastening point on the inner reflector part 4 is generally designated by the reference number 9, since the attachment of the shielding elements 3 can be carried out on the inner reflector part 4 in different ways. The attachment point 9 is located essentially at the same height as the illuminant 1. The shielding elements 3 are arranged in such a way that the shielding elements 3 are arranged essentially radially to the central axis 10 of the illuminant 1. The shielding elements 3 are each offset by 15 about the central axis 10 of the lamp 1. The cross-section of the lamellar shielding elements 3 can have a rectangular shape or a trapezoidal shape with preferably curved side edges. The side surfaces of the anti-glare elements 3 can be mirrored.

The length L of the shielding element section arranged inside the reflector 2 is approximately between 0.6 and 0.9 times the exit width A of the reflector 2. The free end of the shielding elements 3 is chamfered such that the lower edge 8 is closer to the outer Reflector part 5 is brought up as the upper edge 7.

Furthermore, the area delimited by the outside 11 of the inner reflector part 4 can be used as an accessory space 12 for arranging and accommodating various elements. In Fig. 1 an embodiment is shown in which e.g. a cover element 13 is arranged in the form of a ceiling plate in the accessories room 12. For this purpose, the inner reflector part 4 has a circumferential collar 14 for supporting the cover element 13. Furthermore, additional lighting components such as e.g. Downlights, spotlights etc. and / or building components, such as Sprinklers, loudspeakers, air conditioning / ventilation systems can be arranged in and at the area of the accessories room 12.

The embodiment shown in the figures is a recessed ceiling luminaire, which has on its outer reflector part 5 a circumferential flange 15 which is supported against a mounting ceiling 16, while the reflector 2, the illuminant 1 and the shielding elements 3 are arranged within an opening in the ceiling plate 16 are. Known claws 17 which engage behind the ceiling plate 16 and are adjustable with a spindle drive are used to fasten the lamp to the ceiling plate 16.

The operation and functioning of the embodiment described above is explained in more detail below.

For illustration, reference is made to FIG. 8, which shows a linear lamp with a linear lamp 18 and a linear reflector 19 and a circular lamp with an annular reflector and illuminant. The reflectors of the two lights should have the same cross-section. If a fictitious light beam is now emitted at point B of the two lamps, which lies tangentially to the round illuminant and can thus be viewed as a boundary beam, then this light beam reflected at point C is of lower intensity than if the same light beam was at point D of the linear reflector 19 would be reflected. As a result, a dimming must always take place in this area in the case of a linear luminaire, whereas there is a soft transition of the light intensity in this angular area in this area, and a corresponding dimming on the outer edge area can be dispensed with without any appreciable impairment of the dimming properties. As is shown in particular in FIG. 10, the dimming element 20 must therefore extend from one to the other reflector part 21, 22 in a linear lamp.

In contrast to linear lights, FIG. 9 shows a cross section of a ring light according to the invention, in which the shielding element 3 is only attached on one side to the inner reflector part 4 and the free end of which is arranged at a distance from the outer reflector part 5. As a result of the curvature of the ring-shaped lamp, only a small proportion of false radiation emerges through the gap 23 formed between the shielding element 3 and the outer reflector part, which only has a minor influence on the shielding properties.

For this purpose, a fictional ray 24 and a fictitious ray 25 are shown in FIG. 7 in the present embodiment. The beam 24 begins at point a and is reflected on the outer reflector part 5 at point b and then emitted to the outside. The beam 24 is selected so that it does not hit any dimming element 3. However, the number of such rays is so small that their light intensity no longer has a disturbing effect. In the upper view of FIG. 7, the points a and b are drawn in their projection and as a 'and b' as rotated into the cross section of the reflector. The fictitious beam 25 begins at c and is reflected on the outer reflector part 5, at point d. This beam then strikes a shielding element 3 at point e, which preferably has a diffusely reflecting surface. The beam 25 is selected so that it just hits a shielding element 3. Points c, d and e are entered in the figure above similar to points a and b.

With the solution according to the invention, a luminaire with sufficient dimming properties can be produced with lower material and manufacturing costs.

Furthermore, a third embodiment of the present invention, for which protection is sought, is explained in more detail. In order to avoid repetition, the same and similar components are referred to with the same reference numbers as in the above second exemplary embodiment. Only the differences from the above exemplary embodiment will be discussed in the following.

In this embodiment, the inner reflector part 4 has openings 26 which are arranged essentially at the same height as the illuminant 1. The size and spacing of the Openings 26 are selected so that they are each arranged between the shielding elements 3. A lower opening 27 of the accessory room 12 is covered with a lamp glass 28. The lamp glass 28 is a diffuse glass pane that scatters incident radiation.

Furthermore, a truncated cone-shaped reflector 29 is arranged essentially coaxially to the central axis 10, the small diameter of which is assigned to the lamp glass 28. The outer surface of the reflector 29 is concavely curved in order to allow the light to strike the lamp glass 28 evenly if possible.

The operation and operation of the third embodiment will be briefly explained below.

As symbolically represented by the beam 30, a luminous flux component emitted by the illuminant 1 is radiated through the openings 26 onto the outer surface of the reflector 29. This reflects this luminous flux component onto the luminaire glass 28, as a result of which it is diffusely split. This has the effect that the highly directed radiation of the main reflector is superimposed with a soft diffuse radiation. The shimmering of the luminaire glass 28 ensures that the luminance contrast between the luminaire and the surroundings is brought to a comfortable level and reduces glare. The viewer is visually symbolized where the light comes from and the lamp serves as a substitute for the sky. This is further emphasized by the combination of directed light and diffuse light, which is also a characteristic of daylight.

A further embodiment of the present invention is explained in more detail below with reference to FIGS. 13 to 15.

Only the differences from the previous exemplary embodiments are dealt with below, which is why the same reference numbers are used for the same and similar components.

The shielding elements 3 are designed in this embodiment as a coherent prismatic ring lens 31. The ring lens 31 has corresponding prismatic recesses 32 on its underside, the bottom 33 of which is essentially parallel to the flat top of the ring lens 31.

The prismatic recesses are triangular in cross section, so that a circumferential, sawtooth-like profile is formed along the underside of the ring lens 31. Furthermore, the outer edge of the ring lens 31 is provided with a chamfer 34 towards the underside thereof. The underside of the ring lens 31 does not run parallel to the top thereof, so that the ring lens 31 has an increasing thickness towards the outside until the chamfer 34 is reached. The angle of the chamfer 34 is preferably 60 to the vertical. In the case of the prismatic recesses 32, a tip angle of approximately 120 _{° is} preferred.

The inner edge 35 of the ring lens 31 engages in an annular opening 26 in the reflector 2, as a result of which a certain luminous flux component is emitted from the inner edge region of the ring lens 31 into the accessory space 12. The prismatic recesses 36 still end within the reflector area so that there is no dimming effect in this area as far as possible.

In Fig. 13 it can also be seen that in addition to the diffuse lamp glass 28, a colored lamp glass 36 can be arranged at the opening 27.

A further embodiment of the present invention is explained in more detail below with reference to FIGS. 16 and 17.

Here too, only the differences from the previous embodiments are dealt with, which is why the same reference numbers are used here for the same and similar components.

In this embodiment, the shielding elements 3 are designed as a one-part grid, which is arranged below the illuminant 1. The grid consists of a plurality of cylindrical cell bodies 37 with central light passage openings 38. Cell bodies 37 of a certain diameter are each lined up on partial circles which are concentric to the luminaire axis 10. The diameters of the cell bodies 37 including the respective light passage openings 38 increase outwardly from the pitch circle to the pitch circle. The heights of the cell bodies 37, including the respective light passage openings 38, likewise increase outwardly from the pitch circle to the pitch circle. This measure serves to improve the dimming effect.

In order to provide the highest possible fastening point 9, the cell bodies 37 of different partial circles are arranged at least partially offset from one another in height, so that the grid is guided around the illuminant 1 in regions.

To improve the efficiency, the inner surfaces 39 of the light passage openings 38 are curved. The diameter of the light passage opening 38 at the upper end of the cell body 37 is smaller than the diameter at the lower end. Furthermore, 37 light wells 40 are formed between the cell bodies in order to loosen up the grid and improve the efficiency. The outer surfaces of the cell bodies 37 are preferably vapor-coated with a reflective layer, it being possible for the surfaces of the light wells 40 shown in dotted lines in FIG. 17 to remain untreated.

The grid is arranged on a circumferential support ring 41, which is on the inner reflector part 4 is appropriate. Such a support ring 41 can also be used for all other forms of shielding elements 3, as a result of which these can be attached to the inner reflector part 4 in one step. As can be seen in Fig. 17, the support ring 41 is adapted to the inner contour of the reflector 2.

In order to simplify the manufacture of the reflector, the openings 26 can be arranged in the support ring 41.

Claims (47)

1. Luminaire with at least one illuminant (1) and a reflector system (2) assigned to the illuminant (1) and composed of at least two reflector parts (4, 5), the reflector system (2) consisting of an encircling outer and concentrically arranged, encircling inner reflector part (4, 5) and wherein a plurality of shielding elements (3) are provided, characterized in that a plurality of shielding elements (3) are attached at a distance from one another to one reflector part (4) at a distance, while the other end of the Cantilever elements (3) project freely and are at a distance from the other reflector part (5). 2. Luminaire according to claim 1, characterized in that the end of the shielding elements (3) attached to the reflector system (2) is arranged on the inner reflector part (4). 3. Luminaire according to claim 1 or 2, characterized in that the outer reflector part (5) of a substantially in the direction of the central axis (10) of the reflector system (2) is concavely curved ring, while the inner reflector part (4) of one is formed with a smaller ring provided in the same direction as the outer reflector part (5) with a concavely curved inner surface (42). 4. Lamp according to one of claims 1 to 3, characterized in that the illuminant (1) is formed by compact fluorescent tubes. 5. Lamp according to one of claims 1 to 4, characterized in that the shielding elements (3) are arranged substantially radially to the central axis (10) of the reflector parts (4, 5). 6. Luminaire according to one of claims 1 to 5, characterized in that the shielding elements (3) are each offset by 5 to 300, preferably 15 °, about the central axis (10) of the reflector parts (4, 5). 7. Lamp according to one of claims 1 to 6, characterized in that the shielding elements (3) have a substantially lamella shape. 8. Lamp according to one of claims 1 to 7, characterized in that the inner and outer reflector part (4, 5) each have a cross-section substantially in the form of a cycloparabic section. 9. Lamp according to one of claims 1 to 8, characterized in that the shielding elements (3) starting from the inner reflector part (4) in the direction of the outer reflector part (5) are arranged at a downward angle. 10. Luminaire according to one of claims 1 to 9, characterized in that the length (L) of the shielding element section arranged within the reflector system (2) is approximately in the 0.6-0.9 times the outlet width (A) between the inner and outer reflector part (4, 5) of the reflector system (2). 11. Lamp according to one of claims 1 to 10, characterized in that at the free ends of some shielding elements (3) spring locking elements (48) are arranged which are resiliently engaged with the outer reflector part (5). 12. Luminaire according to one of claims 1 to 11, characterized in that the proportions and arrangement of the two reflector parts (4, 5) to each other takes place so that by the inner reflector part (4) 50 to 80% and by the outer reflector part 20 to 50% of the total luminous flux is directed outside. 13. Luminaire according to one of claims 1 to 12, characterized in that at least the inner reflector part (4) and the anti-dazzle elements (3) are made of plastic coated with a reflective layer. 14. Luminaire according to one of claims 1 to 13, characterized in that the shielding elements (3) with a common on the outside of the inner reflector part (4) attachable support ring (41) are attached and preferably vaporized with this together with a reflective layer plastic are manufactured. 15. Luminaire according to one of claims 1 to 14, characterized in that at least the inner reflector part (4) is made of an aluminum pressed part (43). 16. Light according to one of claims 1 to 15, characterized in that the shielding elements (3) are arranged on the upper region of the inner reflector part (4). 17. Lamp according to one of claims 1 to 16, characterized in that the inner reflector part (4) projects beyond the outer reflector part (5) downwards. 18. Luminaire with at least one ring-shaped illuminant (1), in particular according to one of claims 1 to 17, characterized in that the reflector (2) is formed in two parts and from a circumferential outer and a concentrically arranged circumferential inner reflector part (4, 5), and that the lamp (1) is surrounded by two reflector parts (4, 5) like a torus. 19. Luminaire according to claim 18, characterized in that the inner end of the shielding elements (3) is arranged substantially at the level of the illuminant (1) on the inner reflector part (4). 20. Luminaire according to claim 18 to 19, characterized in that the annular illuminant (1) is formed by a ring lamp. 21. Luminaire according to one of claims 18 to 20, characterized in that the reflector parts (4,5) are connected to one another substantially in the region above the fastening points (9) of the shielding elements (3). 22. Luminaire according to one of claims 18 to 21, characterized in that the inner and outer reflector part (4,5) are concavely curved with respect to the illuminant (1). 23. Luminaire according to one of claims 18 to 22, characterized in that the upper and lower edges (7, 8) of the crescent-shaped shielding elements (3) each have circular arc segments, the centers of which lie essentially on the reflector cross-sectional axis (6). 24. Luminaire according to one of claims 18 to 23, characterized in that the area delimited by the outside of the inner reflector part (4) as an accessory space (12) for arranging and accommodating cover elements (13), e.g. Ceiling panels, and / or additional lighting components, e.g. Downlights, spotlights, and / or building components, e.g. Sprinklers, speakers, air conditioning / ventilation systems can be used. 25. Luminaire with at least one ring-shaped lamp (1), an essentially ring-shaped, multi-part reflector (2) assigned to the lamp (1) and an area essentially delimited by the inner outside of the reflector (2), which serves as an accessory space ( 12) can be used for arranging and accommodating, in particular, lighting components, in particular according to one of claims 18 to 24, characterized in that openings (26) are arranged in the inner reflector part (4), through which light emitted by the illuminant (1) enters the accessory space (12) and radiates through a lower opening (27) of the accessory space (12) into the free space. 26. Lamp according to claim 25, characterized in that the lower opening (27) of the accessory space (12) is at least partially covered by a lamp glass (28). 27. Luminaire according to claim 26, characterized in that the lamp glass (28) is a diffuse glass pane. 28. Lamp according to one of claims 25 to 27, characterized in that the openings (26) are arranged substantially at the same height as the illuminant (1). 29. Lamp according to one of claims 20 to 28, characterized in that the openings (26) are each arranged between the shielding elements (3). 30. Luminaire according to one of claims 20 to 29, characterized in that at least one reflector component is arranged in the accessory space (12), which deflects light emerging from the openings (26) onto the lamp glass (28). 31. Luminaire according to one of claims 20 to 30, characterized in that a truncated cone-shaped reflector (29) in the accessory space (12) is arranged substantially coaxially to the luminaire axis (10) as the reflector component is net, the outer surface of which is essentially concavely curved. 32. Luminaire according to one of claims 1 to 31, characterized in that the shielding elements (3) are designed essentially as prismatic lenses. 33. Luminaire according to claim 32, characterized in that all shielding elements (3) are formed together by an annular lens (31) which has corresponding prismatic recesses (32) at least on its underside. 34. Luminaire according to claim 33, characterized in that the prismatic recesses (32) have a triangular shape in cross section. 35. Luminaire according to claim 33 or 34, characterized in that the top of the ring lens (31) is formed substantially flat. 36. Luminaire according to one of claims 32 to 35, characterized in that the ring lens (31) with its inner edge (35) engages at least partially in the openings (26). 37. Luminaire according to one of claims 32 to 36, characterized in that an annular opening (26) is provided in the inner reflector part (4), in which the inner edge (35) of the ring lens (31) engages. 38. Luminaire according to one of claims 1 to 31, characterized in that the shielding elements (3) are designed in the form of a grid. 39. Luminaire according to claim 38, characterized in that the grid is formed in one piece. 40. Luminaire according to claim 38 or 39, characterized in that the grid is constructed from a plurality of substantially cylindrical cell bodies (37) with substantially central light passage openings (38). 41. Luminaire according to claim 40, characterized in that the cell bodies (37) are arranged in a row on partial circles which are concentric to the lamp axis (10). 42. Luminaire according to claim 40 or 41, characterized in that the diameter of the cell body (37) and the respective light passage openings (38) increase outwards from pitch circle to pitch circle. 43. Luminaire according to one of claims 40 to 42, characterized in that the heights of the cell body (37) and the respective light passage openings (38) increase outwards from pitch circle to pitch circle. 44. Luminaire according to one of claims 40 to 43, characterized in that the cell bodies (37) of different partial circles are at least partially offset in height from one another. 45. Luminaire according to one of claims 40 to 44, characterized in that the inner surfaces (39) of the light passage openings are curved, so that the diameter of the light passage opening (38) at the upper end of the cell body (37) is smaller than at the lower end . 46. Luminaire according to one of claims 1 to 45, characterized in that the shielding elements (3) are arranged on a substantially circumferential support ring (41) which is attached to the inner reflector part (4). 47. Luminaire according to claim 46, characterized in that the openings (26) are arranged in the support ring (41).

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