EP1848919B1 - Recessed light - Google Patents

Abstract

An installed lamp has a housing (2) and a retainer for fixing in a installation surface, especially in a room ceiling. On the side of the lighting device zone turned away from the direct-light exit zone (12) is provided a head-reflector (18) separated from the direct light reflector (8) and which is shaped so that it deflects a large part of the light from the lighting device zone (20) into the interior of the direct light reflector (8).

Description

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

Built-in lights are known from the prior art in many forms. Among other things, "dark-light lights" are known in which the lamp and reflector are arranged to each other so that the bulb is seen from a certain angle neither directly nor specularly on the reflector and thus can develop no glare. However, this avoidance of a glare effect also means that the ceiling area of a room illuminated in this way remains largely unlighted and the relationship between light source and illuminated area perceived by humans as being natural is lost, since it is not possible to know from which light source the light originates.

A recessed luminaire of the aforementioned type, which in addition to a direct light exit region also has a diffuse light exit region and which, for example, in the German patent application DE 103 60 947.4 described, avoids the mentioned disadvantages to create a warm lighting indoor climate, since in the direct light exit region according to the "dark-light principle" can be worked, at the same time provides the non-glare diffuse light exit region for the delivery of scattered light, which in the Luminance can be chosen so that no glare occurs. Through the diffuse light exit region is thus always a visible mark the Ensures light source, which despite the use of the dark light principle in the direct light exit area leads to a pleasant perceived room atmosphere with good lighting atmosphere.

Recessed lights, as used in the DE 103 60 947.4 are described, are usually operated with compact fluorescent lamps, with the result that here for special applications that require a particularly intense lighting, sufficient luminance can not be achieved.

document EP-A-0 638 764 discloses a built-in lamp as recessed downlight with a housing and a holder for mounting in a mounting surface, a bulb holder for holding a bulb and a direct light reflector with a lying in the illumination direction, a direct light exit region defining direct light reflector opening. Laterally next to the direct light reflector opening, a diffuse light exit region is provided, wherein the direct light reflector has a lateral opening, so that the luminous means can act on the diffuse light exit region. The direct light reflector is designed such that it also forms a head reflector, which is suitable for deflecting light emitted by the light source opposite to the illumination direction in the direction of illumination.

The DE 297 10 475 U discloses a recessed luminaire with a direct light reflector, which is arranged below the light source and whose lower edge forms the end of the entire luminaire, and a head reflector, which is arranged above the light source. The light of the light source is directed through the head reflector to the outside or to the direct light reflector.

An object of the present invention is to provide a recessed luminaire according to DE 103 60 947.4 in such a way that both the direct light exit region and the diffuse light exit region are subjected to a respectively desired, not too strong and not too weak light component.

This object is achieved by the features of claim 1.

It is according to the invention while retaining all the advantages of a recessed luminaire according to DE 103 60 947.4 achieved that much of the a light emitted light on the one hand directly and on the other hand via the additional head reflector is directed into the interior of the direct light reflector, so that it can ultimately escape from the direct light exit region of the recessed light as direct light. The reaching into the interior of the direct light reflector amount of light is doing by the head reflector with respect to a recessed light according to DE 103 60 947.4 increased significantly, which means that the luminance on the directly illuminated surfaces is significantly increased. Thus, there is a more intense lighting with more pronounced contrasts and stronger shadows, these effects are achieved primarily by the inventively provided additional head reflector.

Furthermore, it is advantageous that the head reflector ensures that a large part of the light incident on it directly, i. E. without further reflection on the inner surfaces of the direct light reflector, can reach the direct light exit region, so that the surfaces to be illuminated are ultimately illuminated to a substantial extent directly on the head reflector. As a result, the reflecting inner surfaces of the direct-light reflector are less bright, which additionally reduces the glare effect attributable to the inner surfaces of the direct-light reflector.

In skillful and subsequently still concretely explained arrangement of the head reflector can be achieved at the same time that even a sufficiently large proportion of light reaches the diffuse light exit area, so that it can not signal the position of the recessed light in a dazzling manner.

Overall, results in an unusually good, uniform light distribution over the entire over the direct light exit area to be illuminated Area with nevertheless pleasant room atmosphere and good light atmosphere. This is achieved by the intensive illumination over the direct light exit area and the delivery of an additional amount of scattered light via the diffuse light exit area.

The advantages according to the invention can be realized particularly well when the head reflector has a concave shape which opens towards the illuminant region. Specifically, the head reflector can be formed for example as a parabolic reflector.

With regard to the positioning of the illuminant region, direct light reflector and head reflector, various possibilities exist according to the invention. However, it is preferred if the illuminant area is arranged on the side of the rear opening of the direct light reflector facing away from the direct light exit area, so that the illuminant area ultimately comes to rest between the rear opening of the direct light reflector and the head reflector. In this case, light emitted from the luminous means reaches the head reflector and is directed from there via the rear opening of the direct light reflector into its interior.

The head reflector is inventively designed to be as small as possible. Specifically, it is possible to make the extension of the head reflector smaller in a direction parallel to the plane of the direct light exit region than the diameter of the rear opening of the direct light reflector. The head reflector should at the same time at least largely overlap the illuminant present in the illuminant region, which is why it is advantageous if the extent of the head reflector in a direction parallel to the plane of the direct light exit region is greater than the longitudinal extent of the illuminant region or the illuminant in a direction also parallel to the plane of the direct light exit region.

It is preferred if the illuminant area is arranged at least substantially within the head reflector, since in this way it is achieved that the light emitted by the illuminant strikes a very large proportion directly on the head reflector and can pass from there into the interior of the direct light reflector.

It is advantageous if the direct light exit region and the diffuse light exit region are acted upon by a common light source, since in this way no separate light source has to be provided for the diffuse light exit region.

In a housing region surrounding the direct light reflector and / or the head reflector, an additional reflector may be provided, which is formed in particular by the inner surfaces of the housing. About this additional reflector is then applied primarily the diffuse light exit region, but to a lesser extent, the direct light exit region can be acted upon via the additional reflector. In such an arrangement, the illuminant radiates to a direct light directly through the direct light reflector and indirectly via the head reflector in the actual illumination direction and on the other hand also to the additional reflector, which at least partially directs the incident light on him to the diffuse light exit region. The additional reflector can reflect either specularly or diffusely, wherein in the former case, a conversion of directly reflected light in the scattered light should still take place in the region of the diffuse light exit region.

The inventively provided bulb holder can be designed in particular for holding a halogen lamp, a high-pressure halogen lamp or other punctiform light source, as can be achieved with such a light source particularly high illuminance or a particularly high luminous flux.

According to the invention, a diffusing screen is arranged on the side of the illuminant area facing away from the head reflector. This diffuser preferably extends parallel to the plane of the direct light exit region. In particular, it can be arranged between the illuminant area and the rear opening of the direct light reflector.

The extension of the lens in a direction parallel to the plane of the direct light exit region is advantageously approximately the same size as the corresponding extent of the head reflector.

According to the invention, the diffusing screen is arranged at a distance both from the head reflector and from the rear opening of the direct-light reflector, it being possible for these distances to be between 0.5 cm and 3 cm. This ensures that a comparatively small, but sufficiently large amount of light does not get into the interior of the direct light reflector, but rather can be directed to the diffuse light outlet region.

The lens provided according to the invention causes the light reflected from the head reflector in the direction of the interior of the direct light reflector to pass through the lens. Still must also that light pass through the lens through which passes directly from the lamp and without reflection on the head reflector in the interior of the direct light reflector. As a result, the light passing through the diffusing screen is distributed particularly uniformly over the direct light exit region, thus ultimately ensuring a uniform illumination of the surfaces to be acted upon by reducing the luminance of the illuminant. At the same time, due to its light-conducting and / or reflecting properties, the diffusing screen can ensure that light also reaches the additional reflector already mentioned above, which is then ultimately responsible for acting on the diffuse light exit region.

It is particularly preferred if the lens is formed as a UV filter. Since ultimately the entire light emerging from the direct light exit region must first pass through the lens, the lens already ensures sufficient UV filtering, so that it is no longer necessary to form a cover plate provided in the direct light exit region as a UV filter , The diffuser has regularly smaller dimensions than a cover in the direct light exit area. The total area of the UV filter to be provided in the recessed luminaire according to the invention can thus be significantly reduced by a diffuser designed as a UV filter, so that an economic advantage is achieved as a result.

Alternatively or additionally, the diffusing screen can also be designed as a color filter, so that colored light emerges from the direct light exit area-in contrast to the diffuse light exit area.

The bulb socket of a recessed luminaire according to the invention can in particular be mounted pivotably together with a lens holder. In this case, the bulb socket can be shared with the illuminant and possibly the diffuser together with the lens holder, for example, pivot from a substantially horizontal position into a position in which the illuminant is particularly well accessible for the purpose of replacement. The maximum pivoting angle in such a pivoting movement may be, for example, between 45 ° and 90 °, in particular between 50 ° and 70 °. With a swivel angle of about 60 °, the light source can be replaced very easily.

The lamp holder and in particular the lens holder can be biased by means of a spring element in its operating position. In the operating position bulbs and diffuser generally extend horizontally. When replacing the illuminant or the diffuser then only the already described pivoting movement must take place against the comparatively low force of the spring element, whereupon in this pivoted position a change of the illuminant is easily possible. After completed change of the bulb, the bulb holder and possibly the lens holder are automatically swung back by the spring element in its correct operating position, so that incorrect operation is practically impossible.

Bulb socket and lens holder can be provided in a common holding element. In this case, the common pivotal movement of the bulb holder and lens holder can be accomplished particularly simply by the fact that said holding element is designed to be pivotable. In this case, bulb holder and lens holder can be rigidly arranged in the holding element.

A particularly good accessibility of the particular pivotable light source is obtained when the direct light reflector is pivotally held in the housing. In this case, the direct-light reflector can first be pivoted away, so that lighting means and, if appropriate, scattering disk are easily accessible for a further pivoting movement.

The diffuse light exit region according to the invention - as already mentioned - not acted on the head reflector, but only indirectly via the additional reflector and possibly on the lens. A particularly good illumination of the diffuse light exit region results when the direct light reflector is designed to be reflective or diffusely reflective on its outer side, since in this case light can pass particularly well through the additional reflector and the outside of the direct light reflector to the diffuse light exit region.

The housing of the recessed luminaire according to the invention can be completed in the region of the diffuse light exit region and preferably also in the region of the direct light exit region by a transparent cover, in particular at least substantially dust-tight. It is not necessary to perform this disc as a UV filter when the lens already acts as a UV filter.

The cover plate can also be provided only in the region of the diffuse light exit region, so that the direct light exit region is open in the illumination direction. In this case, it is preferable if the cover plate has the light scattering properties desired in the diffused light exit region and is accordingly made of a suitable material which is not completely transparent. Further preferred embodiments of the invention are specified in the subclaims.

Fig. 1

einen Diagonalschnitt durch eine perspektivische Ansicht einer erfindungsgemäßen Einbauleuchte, bei dem sich alle Elemente der Einbauleuchte in ihrer jeweiligen Betriebspo- sition befinden,

Fig. 2

einen Diagonalschnitt durch eine perspektivische Ansicht einer Einbauleuchte gemäß Fig. 1, bei der sich Direktlicht- reflektor, Leuchtmittel und Streuscheibe in einer gegenüber Fig. 1 verschwenkten Position befinden, in der ein Leucht- mittelwechsel möglich ist, wobei Direktlichtreflektor und Diffuslicht-Austrittsbereich in dieser Darstellung im Unter- schied zu Fig. 1 nicht geschnitten dargestellt sind,

Fig. 3

die in einer Leuchte gemäß den Fig. 1 und 2 zum Einsatz gelangende Einheit aus Kopfreflektor, Leuchtmittel und Streuscheibe in ihrer jeweiligen Betriebsposition (geschnit- tene Seitenansicht),

Fig. 4

eine Fig. 3 entsprechende Darstellung, bei der sich Leucht- mittel und Streuscheibe in einer verschwenkten Position be- finden, in welcher ein Wechseln des Leuchtmittels möglich ist,

Fig. 5

eine Explosionszeichnung der in den Fig. 3 und 4 darge- stellten Einheit aus einer ersten Perspektive, und

Fig. 6

eine Explosionszeichnung der in den Fig. 3 und 4 darge- stellten Einheit aus einer zweiten Perspektive.

The invention will be explained below with reference to an embodiment with reference to the drawings; in these show:

Fig. 1

a diagonal section through a perspective view of a recessed luminaire according to the invention, in which all elements of the recessed luminaire are in their respective operating position,

Fig. 2

a diagonal section through a perspective view of a recessed light according to Fig. 1 , in which the direct light reflector, the light source and the diffuser face one another Fig. 1 In this illustration, in contrast to., the direct light reflector and the diffuse light exit region are located in the pivoted position in which a light source change is possible Fig. 1 are not shown cut,

Fig. 3

in a lamp according to the Fig. 1 and 2 used unit consisting of head reflector, illuminant and diffuser in their respective operating position (sectional side view),

Fig. 4

a Fig. 3 corresponding representation in which the illuminant and diffuser are in a pivoted position, in which a change of the illuminant is possible,

Fig. 5

an exploded view of the in the Fig. 3 and 4 presented unit from a first perspective, and

Fig. 6

an exploded view of the in the Fig. 3 and 4 presented unit from a second perspective.

The recessed luminaire according to the invention according to the Fig. 1 to 6 has a unilaterally open housing 2, which is at least largely sealed dust-tight in the region of its open, located in the direction of illumination side with a square cover 4. The cover 4 is fixed in a pivotally mounted on the housing frame 6.

A substantially dome-shaped direct light reflector 8 with a rear opening 10 is connected to the cover 4 in a suitable manner. The region of the cover 4, which closes the direct light reflector 8 in the illumination direction, forms a circular direct light exit region 12, which is surrounded by a diffuse light exit region 14. The diffuse light exit region 14 is bounded on the inside by a circular line corresponding to the direct light reflector 8 and on the outside by a square line corresponding to the frame 6. In particular, a diffuser disk 16 can extend in the diffuse light exit region 14 parallel to the cover disk 4, which ensures that the light striking the diffuser light exit region 14 actually emerges as stray light from the built-in lamp. In this case, a lying in the direction of illumination, outwardly facing collar of the direct light reflector 8 between the cover 4 and the diffuser disc 16 may be clamped, so that in this way the direct light reflector 8 is fixed in the region of the cover 4.

Alternatively, it would also be possible to use a cover disk which terminates only the diffuse light exit region 14 and which has a circular hole in the region of the direct light exit region 12.

The outside of the direct light reflector 8 and the inner sides of the housing 2 are formed reflecting or diffusely reflecting.

On the side of the rear opening 10 of the direct light reflector 8, which faces away from the direct light exit region 12, there is an inventive head reflector 18, which has a parabolic shape. Part of the head reflector 18, partly between this Kopfreflektor 18 and the rear opening 10 is the illuminant region 20 according to the invention, in which a designed as a high-pressure halogen lamp 22 in its operating position ( Fig. 1 and Fig. 3 ) comes to rest.

Between the rear opening 10 of the direct light reflector 8 and the lamp 22 is a substantially circular lens 24 whose diameter corresponds approximately to the diameter of the head reflector 8 and which accordingly can ensure that the light source 22 directly or indirectly via the head reflector 18 in the interior of the direct light reflector 8 radiated light must pass through the lens 24, so that sets over the entire surface of the lens 24 constant and compared to the bulb 22 reduced luminance, resulting in a particularly uniform illumination of the inner region of the direct light reflector. 8 results.

The luminous means 22 is held in a luminous means holder 26, which in turn is accommodated in a holding element 28. The holding element 28 together with a holding plate 30 and two screws 32 a holder for the lens 24th

At the back of the Kopfreflektors 18, a U-shaped retaining web 34 is formed, via which the Kopfreflektor 18 can be firmly connected to the bottom of the housing 2. The U-shaped retaining web 34 has two conically outwardly tapering, also U-shaped recesses 36, in which two conical retaining pins 38 are hooked, which are laterally formed on the holding element 28.

When hinged in the recesses 36 retaining pin 38 provides an intermediate spring element 40 that the pivotable relative to the head reflector 18 holding member 28 in its horizontal operating position according to the Fig. 1 and 3 is held. Contrary to the force of the spring 40, the holding member 28 can be pivoted, for example by gripping the lens 24 after opening the frame 6 in a position as in the Fig. 2 and 4 is shown. In this position, the lighting means 22 is easily accessible for the purpose of replacement.

The photometric interaction between head reflector 18, light source 20, diffuser 24, housing inner side 2 and the inside and the outside of the direct light reflector 8 has already been explained in detail above. The head reflector 18 ultimately ensures together with the lens 24 for intense illumination on the direct light exit region 12. Since the lens 24 is spaced from the head reflector 18 and also from the rear opening 10 of the direct light reflector 8, although passes a comparatively lower, however sufficiently large amount of light on the spaces generated by said distances and also on the light-conducting properties the diffuser 24 not in the interior of the direct light reflector 8, but on the reflective or remittierenden insides of the housing 2 and the also reflective or remittierende outside of the direct light reflector 8 to the diffuse light exit region 14, from which this light component then emerges as stray light from the cover 4 ,

LIST OF REFERENCE NUMBERS

2

casing

4

cover plate

6

frame

8th

Direct light reflector

10

rear opening

12

Direct light discharge region

14

Diffuse light discharge region

16

diffuser

18

upper reflector

20

Lamp area

22

Lamp

24

diffuser

26

Lamp holder

28

retaining element

30

Retaining plate

32

screw

34

holding web

36

recesses

38

retaining pins

40

spring element

Claims (22)

1. A built-in lamp comprising a housing (2) and a holder for fastening in a build-in surface, in particular a room ceiling, a light source socket (26) for holding a light source (22) in a light source region (20) and a direct light reflector (8) having a direct light reflector opening which is disposed in the direction of illumination, which defines a direct light exit region (12) and which is surrounded at least regionally by a diffuse light exit region (14), with the direct light reflector (8) having a rear opening (10),
   characterized in that
   a head reflector (18) is provided on the side of the light source region (20) remote from the direct light exit region (12), is separate from the direct light reflector (8) and is shaped such that it directs at least a large portion of the light emitted from the light source region (20) and incident onto it into the inner space of the direct light reflector (8).,
   characterized in that
   a diffuser plate (24) is arranged on the side of the light source region (20) remote from the head reflector (18) and is arranged spaced apart both from the head reflector (18) and from the rear opening (10) of the direct light reflector (8), with these spacings amounting to between 0.5 cm and 3 cm
2. A built-in lamp in accordance with claim 1, characterized in that the head reflector (18) has a concave shape opening toward the light source region (20).
3. A built-in lamp in accordance with claim 2, characterized in that the head reflector (18) is made as a parabolic reflector.
4. A built-in lamp in accordance with any one of the preceding claims, characterized in that the light source region (20) is arranged on the side of the rear opening (10) of the direct light reflector (8) remote from the direct light exit region (12) so that the light source region (20) is disposed between the rear opening (10) of the direct light reflector (8) and the head reflector (18).
5. A built-in lamp in accordance with any one of the preceding claims, characterized in that the extent of the head reflector (18) is smaller in a direction extending parallel to the plane of the direct light exit region (12) than the diameter of the rear opening (10) of the direct light reflector (8).
6. A built-in lamp in accordance with any one of the preceding claims, characterized in that the extent of the head reflector (18) is larger in a direction extending parallel to the plane of the direct light exit region (12) than the longitudinal extent of the light source region (20) or of the light source (22) in a direction likewise extending parallel to the plane of the direct light exit region (12).
7. A built-in lamp in accordance with any one of the preceding claims, characterized in that the light source region (20) is arranged at least substantially inside the head reflector (18).
8. A built-in lamp in accordance with any one of the preceding claims, characterized in that the light source socket (26) is configured for the holding of a halogen lamp, of a high pressure halogen lamps (22) or of another spot-like source of light.
9. A built-in lamp in accordance with any one of the preceding claims, characterized in that the diffuser plate (24) extends parallel to the plane of the direct light exit region (12).
10. A built-in lamp in accordance with any one of the preceding claims, characterized in that the diffuser plate (24) is arranged between the light source region (20) and the rear opening (10) of the direct light reflector (8).
11. A built-in lamp in accordance with one of the claims 9 or 10, characterized in that the extent of the diffuser plate (24) is approximately equally as large in a direction extending parallel to the plane of the direct light exit region (12) as the corresponding extent of the head reflector (18).
12. A built-in lamp in accordance with any one of the preceding claims, characterized in that the diffuser plate (24) is made as a UV filter and/or a color filter.
13. A built-in lamp in accordance with any one of the preceding claims, characterized in that the light source socket (26) is pivotably supported, in particular together with a diffuser plate holder (28, 30, 32).
14. A built-in lamp in accordance with claim 13, characterized in that the maximum pivot angle amounts to between 45° and 90°, in particular to between 50° and 70°.
15. A built-in lamp in accordance with one of the claims 13 or 14, characterized in that the light source socket (26) and in particular also the diffuser plate holder (28, 30, 32) are biased into their operating positions by means of a spring element (40).
16. A built-in lamp in accordance with any one of the claims 13 to 15, characterized in that the light source socket (26) and the diffuser plate holder (28, 30, 32) are provided in a common holding element (28).
17. A built-in lamp in accordance with any one of the preceding claims, characterized in that the direct light reflector (8) is held pivotably in the housing (2).
18. A built-in lamp in accordance with any one of the preceding claims, characterized in that the direct light exit region (12) and the diffuse light exit region (14) can be acted on by a common light source (22).
19. A built-in lamp in accordance with any one of the preceding claims, characterized in that a separate additional reflector, which is in particular formed by inner surfaces of the housing (2), is provided in a housing region surrounding the direct light reflector (8) and/or the head reflector (18).
20. A built-in lamp in accordance with claim 19, characterized in that the diffuse light exit region (14) can only be acted on by the light source (22) indirectly via the additional reflector (2) and/or via the diffuser plate (24).
21. A built-in lamp in accordance with any one of the preceding claims, characterized in that the direct light reflector (8) is made specularly reflecting or diffusely reflecting on its outer side.
22. A built-in lamp in accordance with any one of the preceding claims, characterized in that the housing (2) is in particular at least largely closed in a dust tight manner by a transparent plate (4) in the region of the diffuse light exit region (14) and preferably also in the region of the direct light exit region (12).

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