WO2023066681A1

WO2023066681A1 - Recessed light, in particular recessed ceiling light

Info

Publication number: WO2023066681A1
Application number: PCT/EP2022/077898
Authority: WO
Inventors: Detlef Matthäi; Markus Höngen; Tobias Link
Original assignee: Instalighting Gmbh
Priority date: 2021-10-19
Filing date: 2022-10-07
Publication date: 2023-04-27
Also published as: DE102021127014A1

Abstract

The invention relates to a recessed light (10), in particular a recessed ceiling light (10), comprising - a housing (12), - a lighting means (14) that is arranged in the housing (12), - a lens (16) that is arranged in the housing (12), and - an adjustment means (18); wherein - the lighting means (14) has an outer side (14') facing away from the lens (16) and the lens (16) has an outer side (16') facing away from the lighting means (14); and - the adjustment means (18) adjustably connects the lighting means (14) and the lens (16) to one another, in such a way that the distance between the lighting means (14) and the lens (16) can be altered using the adjustment means (18).

Description

RECESSED LUMINAIRES, PARTICULARLY RECESSED CEILING LUMINAIRES

The invention relates to a downlight and in particular to a downlight.

DE 10 2009 060 897 A1 discloses a recessed ceiling light which comprises a housing, a reflector with a light entry opening and a light exit opening, a circuit board, a large number of LEDs, a converging lens and a diffuser element. The luminaire is arranged flush in a ceiling to illuminate a floor area of a building. The underside of the reflector and the underside of the housing are flush with the underside of the ceiling. The reflector, the circuit board, the LEDs, the converging lens and the diffuser element are arranged in the housing. The LEDs are arranged on the circuit board. The converging lens is arranged in the light path between the LEDs and the light entry opening and bundles the light emitted by the LEDs onto the light entry opening. The reflector is cup-shaped in cross section. The light entry opening is made smaller than the light exit opening. The diffuser element is arranged in the area of the light entry opening and is provided with a spherically curved surface. A homogeneous light intensity distribution is provided by the diffuser. In this respect, the underside of the diffuser acts as a separate light source for the reflector. Some parts of the light leave the lamp, starting from the diffuser, without being reflected at the reflector. Other light components are reflected on the inner wall of the reflector. In this recessed ceiling light, the reflector is designed as a dark light reflector. In the case of a Darklight reflector, the bundle of light rays emitted by the luminaire has two marginal rays. These each enclose an angle to the underside of the ceiling, which is referred to as the shielding angle. The space between the underside of the ceiling and the respective marginal ray is referred to as the shadow space. No light emanating from the lamp penetrates into the shadow space, neither direct light components emitted by the diffuser element and leaving the lamp without reflection, nor indirect light components reflected by the reflector. A user located in the shaded area is not dazzled by incident light.

Such recessed ceiling lights can be built flush into a suspended ceiling at several predetermined mounting points, for example in shopping centers to illuminate the corridors and corridors. At each assembly point, depending on the Given spatial dimensions and architectural elements, in particular the ceiling height and the horizontal distance to walls and shop windows, a recessed ceiling light with a suitable beam angle is selected and installed so that, for example, a shop window is not illuminated in order to avoid unwanted reflections. For example, it can make sense to install a recessed ceiling light with a beam angle of approx. 10° if the ceiling is high and/or a small distance from a shop window, and a recessed ceiling light with a light if the ceiling is low and/or a large distance from a shop window to install a beam angle of approx. 80°. Even if, for example, a new campaign stand is set up or dismantled in a corridor, the lighting must be adjusted. For this purpose, those recessed ceiling lights whose beam angle no longer matches the new specifications must be removed and recessed ceiling lights with a more suitable beam angle installed.

The object of the invention is to create a recessed ceiling light whose beam angle can be easily changed when installed.

Against this background, the invention proposes the subject matter of the independent claim. Advantageous embodiments of the invention are described in the dependent claims.

The invention proposes a built-in light, which is in particular a built-in ceiling light, comprising

- a housing;

- A lighting means, which is arranged in the housing;

- a lens, which is arranged in the housing;

- An adjusting means for adjusting the distance between the illuminant and the lens; whereby

- The adjustment means adjustably connects the light source and the lens to one another in such a way that the distance between the light source and the lens can be changed or can be changed with the aid of the adjustment means.

The invention makes it possible for the beam angle to be changed from the outside without tools even when the recessed light is installed. The proposed recessed light can be designed in any way as required, for example as a recessed ceiling light that can be installed in a ceiling, in particular flush or recessed, or as a recessed wall light that can be installed in a wall, in particular flush or recessed or as a recessed floor light that can be built into a floor, in particular flush or recessed, and/or in such a way that it requires no additional or at least one additional light source and/or no additional or at least one additional lens and/or no additional or at least one additional adjustment means.

The housing can be designed in any way as required and, for example, can have an essentially circular-cylindrical basic shape.

Each light source can be designed in any way as required and can, for example, comprise exactly or at least one incandescent lamp and/or exactly or at least one halogen incandescent lamp and/or exactly or at least one light-emitting diode and/or exactly or at least one fluorescent lamp.

Each lens can be formed in any way as required, for example convex or plano-convex or biconvex or concavo-convex or concave or plano-concave or biconcave or convex-concave, and/or as a Fresnel lens, and/or spherical or aspherical or astigmatic.

The light source and the lens can be arranged in any way in the housing as required, for example in such a way that the light source is attached or fixed to the housing, in particular detachably, and the lens is movably mounted on the housing, or that the light source is mounted on the housing movably mounted and the lens is attached or fixed to the housing, in particular detachably, or that the lens and the illuminant are movably mounted on the housing.

In an exemplary embodiment of the built-in light, it is provided that the adjusting means comprises

- a screw having a screw head and a screw shank with an external thread, and

- a nut with an internal thread that engages with the external thread. The screw and the nut connect the lamp and the lens to one another in such a way that by turning the screw relative to the nut, the distance between the lamp and the lens and thus also the beam angle can be changed or changed, in particular increased or decreased.

In an exemplary embodiment of the recessed light is provided according to a first alternative that

- the lens has a through hole;

- The screw shank is passed through the through hole;

- the screw head is fixed to the lens and/or engages the outside of the lens;

- The nut is attached to the bulb and/or engages the outside of the bulb.

An operator can grab and turn the screw head from the outside without tools even when the downlight is installed, thus turning the screw in the nut, so that the distance between the lens that is fixed or engaged with the screw head and the bulb that is fixed to the nut is or attacks, and thus the beam angle is changed, in particular increased or decreased.

In an exemplary embodiment of the recessed light is provided according to a second alternative that

- The illuminant has a through hole;

- The screw shank is passed through the through hole;

- the nut is fixed to the lens and/or engages the outside of the lens;

- the screw head is attached to the bulb and/or engages on the outside of the bulb.

Even with the downlight installed, an operator can grab and turn the nut from the outside without tools, turning the nut on the screw so that the clearance between the lens that is attached or engages the nut and the bulb that is attached to the screw head is or attacks, and thus the beam angle is changed, in particular increased or decreased. It is preferably provided that

- The screw is designed as a knurled screw or wing screw or star knob screw; and or

- The nut is designed as a knurled nut or wing nut or star grip nut.

In an exemplary embodiment of the recessed light is provided that

- the lens has an external thread;

- The housing has an internal thread which engages in the external thread;

- The adjusting means includes the external thread and the internal thread.

An operator can also touch the lens from the outside without tools when the built-in light is installed and rotate the lens in the housing, for example if there is sufficient static friction, so that the distance between the lens and the light source and thus also the beam angle is changed, in particular increased or decreased. Preferably, an area with exactly or at least one depression and/or with exactly or at least one elevation and/or with a roughness that is greater than the adjacent areas of the outside is formed on the outside of the lens.

In an exemplary embodiment of the recessed light is provided that

- the housing has a first and an opposite second end region;

- The illuminant is arranged at the first end area or the lens is arranged at the second end area.

The light source can be arranged on the first end area in any way as required, for example in such a way that the light source is attached or fastened to this end area, in particular detachably, or is located on this end area. The lens can be arranged on the second end area in any way as required, for example in such a way that the lens is attached or fastened to this end area, in particular detachably, or is located on this end area.

In an exemplary embodiment of the built-in light, it is provided that an inner surface of the housing has a scale with at least two markings. This enables a desired, reproducible adjustment of the distance between the lens and the light source and thus also of the beam angle. In an exemplary embodiment of the recessed light is provided that

- the adjusting means comprises an actuating means which is arranged on or on the outside of the lens;

- The adjustment means adjustably connects the light source and the lens to one another in such a way that the distance between the light source and the lens can be changed or can be changed with the aid of the actuation means.

The actuating means can be arranged in any way on or on the outside of the lens, for example in such a way that the actuating means is attached or fastened to or on this outside, in particular detachably, or is on or on this outside or in one of these outsides bordering area.

It is preferably provided that the actuating means comprises a handle which is arranged and/or attached and/or fastened on or on the outside of the lens. The actuating means can be designed in any way as required and, for example, can include no additional handle or at least one additional handle. Each handle can be formed in any manner, such as knurled, as required. If the screw head is attached to the lens and/or acts on the outside of the lens, the screw head preferably forms the actuating means and/or one of the handles. If the nut is attached to the lens and/or engages the outside of the lens, then preferably the nut forms the actuating means and/or one of the handles.

In an exemplary embodiment of the recessed light is provided that

- The illuminant has an external thread;

- The housing has an internal thread which engages in the external thread;

- The adjusting means comprises the external thread and the internal thread;

- The actuating means is attached to the lighting means and has an actuating section which is arranged on the outside of the lens or in an area bordering on this outside.

Even when the built-in light is installed, an operator can grip the actuating section from the outside without tools and rotate the lamp, since it is attached to the actuating means and thus connected to it, using the actuating section in the housing, so that the distance between the lens and the lamp and therefore the beam angle is changed, in particular increased or decreased.

The actuating means can be arranged on the lighting means in any desired manner, for example in such a way that the actuating means is attached or fastened to the lighting means, in particular detachably. The actuating means can be designed in any way as required, for example in such a way that it comprises no additional or at least one additional actuating section, and/or in such a way that, starting from the lighting means, it passes the lens, for example through a gap between an edge of the lens and the housing or through a through hole in the lens, extends at least to the outside of the lens, so that the operating portion is located on the outside of the lens or in the area adjacent to this outside.

In an exemplary embodiment of the built-in light, it is provided that the lens comprises at least one Fresnel lens. This enables a particularly space-saving and mass-saving lens.

In an exemplary embodiment of the built-in light, it is provided that the light source comprises at least one light-emitting diode. This enables a particularly space-saving and energy-efficient light source.

Provision is preferably made for the light source to comprise a plurality of light-emitting diodes which are arranged in at least two concentric circles. This enables artifact-free illumination even with different beam angles.

If, in the context of the present invention, the term "approximately" or "approximately" or "substantially" is used in connection with values or value ranges or with properties or geometries, this is to be understood as a tolerance range that is customary for the person skilled in the art in this field deems In particular, a tolerance range of ±20%, preferably ±10% and more preferably ±5% in connection with values or value ranges when using the term “approximately” is provided. Lower limits of value ranges can thus be undercut by 5% to 20%. Upper limits of value ranges can thus be exceeded by 5% to 20%. Insofar as different value ranges, for example preferred and more preferred value ranges, are specified in the present invention, the lower limits and the Upper limits of the different value ranges can be combined with one another.

In the following, embodiments of the invention are explained in more detail by way of example with reference to the accompanying drawings. However, the resulting individual features are not limited to the individual embodiments, but can be connected and/or combined with individual features described above and/or with individual features of other embodiments. The details in the drawings are only to be interpreted as illustrative and not restrictive. The reference signs contained in the claims are not intended to limit the scope of the invention in any way, but merely refer to the embodiments shown in the drawings.

The drawings show in

FIG. 1 is a sectional side view of a preferred embodiment of a downlight, wherein a small distance is set between an illuminant and a lens;

FIG. 2 the recessed light from FIG. 1, with a large distance set between the illuminant and the lens;

FIG. 3 is a perspective exploded view of FIG. 1 viewed diagonally from below;

FIG. 4 is a perspective exploded view of FIG. 1 viewed diagonally from above.

In FIG. 1 to FIG. 4 shows a preferred embodiment of a recessed light 10 according to the invention, which forms a recessed ceiling light by way of example. The built-in light 10 comprises a housing 12 with a first and an opposite second end region 12', 12'', a light source 14 with an outside 14' and an opposite inside 14'', a lens 16 with an outside 16' and an opposite inside 16''. and an adjustment means 18 for adjusting a distance between the illuminant 14 and the lens 16. The housing 12 has an essentially circular-cylindrical basic shape with an essentially circular housing base 20 and a peripheral wall projecting downwards therefrom in FIGS. The housing bottom 20 corresponds to the first end portion 12' and the free edge of the peripheral wall corresponds to the second end portion 12''. The illuminant 14 and the lens 16 have a substantially They have a small circular basic shape and are arranged essentially parallel to one another in the housing 12 in such a way that the outside 14' points away from the lens 16 and towards the housing bottom 20, while the inside 14" points towards the lens 16 and the inside 16". , the outer side 16' points away from the illuminant 14, and the inner side 16'' points towards the illuminant 14.

The light source 14 is designed according to a preferred embodiment and comprises an essentially circular circuit board 22 and a plurality of light-emitting diodes 24 (FIG. 3). The board 22 has an inside surface shown in FIG. 1 and 2 faces downward and corresponds to the inside 14" and an opposite outside which abuts the housing base 20 and corresponds to the outside 14'. The light emitting diodes 24 are arranged in three concentric circles on the inside 14". The circuit board 22 rests with the outside 14 ′ on the housing base 20 and is screwed to the housing base 20 with the aid of screws. Consequently, the illuminant 14 is arranged on the first end area 12' and is detachably fastened to this end area 12'.

The lens 16 is designed according to a preferred embodiment and comprises a substantially circular, plano-convex Fresnel lens 16, in which the inside 16 "is planar or planar and the outside 16' is convex. The Fresnel lens 16 has three concentric, annular regions which correspond to the three concentric circles of the light-emitting diodes 24 are assigned.

The adjusting means 18 is designed according to a preferred embodiment and comprises a 26 screw, which has a screw head 26' and a screw shank 26" with an external thread, a nut 28 with an internal thread which engages in the external thread, and an actuating means. The screw head 26 is knurled, for example, so that the screw 26 is a knurled screw.

The lens 16 has a through hole 30 . The screw shank 26" is guided through the through hole 30 in such a way that the screw head 26' engages on the outside 16'. The screw shank 26" can also be detached from the lens 16 with the aid of a stop nut 32, which engages on the inside 16". fastened, a washer 34 made of plastic being arranged between the stop nut 32 and the inside 16''. Consequently, the screw head 26' is also detachably fastened to the lens 16. A through hole 36 (FIGS. 3 and 4) is also formed in the housing base 20 and the circuit board 22 and is aligned with the through hole 30 . A circular-cylindrical sleeve 38 is pressed into the housing base 20 , the cavity of which surrounds the through-hole 38 . The nut 28 is fitted onto the free edge of the sleeve 38 shown in FIG. 1 and 2 facing up and away from the housing base 20 is glued. Consequently, the nut 28 is fixed to the bulb 14 and engages the outside 14'. The screw shank 26" is also passed through the through hole 36 and the sleeve 38 into the nut 28, so that the screw 26 can be screwed in and out of the nut 28. Since the screw head 26' on the lens 16 is fastened, this screwing movement causes the lens 16 to be moved towards or away from the lamp 14. Consequently, the lens 16 is movably mounted on the housing 12, the screw 26 and the nut 28 connect the lamp 14 and the Lens 16 to each other in such a way that by turning the screw 26 relative to the nut 28, the distance between the lamp 14 and the lens 16 and thus also the beam angle can be changed, and the adjusting means 18 adjustably connects the lamp 14 and the lens 16 to one another in such a way that with the help of the adjusting means 18 this distance can be changed.

An operator can now grip and turn the screw head 26' from the outside without tools, even when the built-in light 10 is installed, and thus turn the screw 26 in the nut 28 by the distance between the lens 16 and the light source 14 and thus also to change the beam angle as desired.

The actuating means is designed according to a preferred embodiment and comprises a handle 26', which is formed by the screw head 26'. Consequently, the actuating means is arranged on the outer side 16', releasably fastened and is located on or on this outer side 16' or in an area bordering on this outer side 16', the adjustment means 18 adjustably connects the lighting means 14 and the lens 16 to one another in such a way that the distance between the illuminant 14 and the lens 16 can be changed with the aid of the actuating means.

On the inner surface of the peripheral wall, the housing 12 has a scale 40 with four markings, for example. This results in a desired, reproducible adjustment of the distance between the illuminant 14 and the lens 16 and thus also of the angle of radiation allows. In FIG. 1, a minimum adjustment of this distance is shown with the screw 26 threaded into the nut 28 far enough for the stop nut 32 to abut the inner surface 14'' and the lens 16 to be approximately level with the uppermost one in FIGS mark. With this minimum setting, the radiation angle is approximately 80°. FIG. 2 shows a maximum setting of this distance, in which the screw 26 is screwed out of the nut 28 so far that the screw shank 26" is still in engagement with of the nut 28 and the lens 16 is approximately at the height of the position shown in FIG. 1 and 2 bottom mark. With this maximum setting, the beam angle is approximately 10°.

Reference List

10 recessed light, recessed ceiling light

12 housing

12'/12" first/second end portion of 12

14 bulbs

14'/14" outside/inside of 14

16 lens, Fresnel lens

16'/16" outside/inside of 16

18 adjustment medium

20 caseback

22 circuit board

24 LEDs

26 screw

26' screw head, handle

26" screw shaft

28 mother

30 through hole in 16

32 stop nut

34 washer

36 through hole in 20 and 22

38 sleeve

40 scale

Claims

Expectations

1. Recessed light (10), in particular recessed ceiling light (10), comprising

- a housing (12);

- A lighting means (14) which is arranged in the housing (12);

- a lens (16) which is arranged in the housing (12);

- an adjustment means (18); whereby

- the lighting means (14) has an outside (14') pointing away from the lens (16) and the lens (16) has an outside (16') pointing away from the lighting means (14);

- The adjustment means (18) adjustably connects the lamp (14) and the lens (16) to one another in such a way that the distance between the lamp (14) and the lens (16) can be changed with the aid of the adjustment means (18).

2. Recessed light (10) according to the preceding claim, wherein

- Includes the adjusting means (18).

- a screw (26) having a screw head (26') and a screw shank (26") with an external thread, and

- a nut (28) with an internal thread.

3. Downlight (10) according to claim 2, wherein

- the lens (16) has a through hole (30);

- the screw shank (26") is passed through the through hole (30);

- the screw head (26') is attached to the lens (16) and/or engages the outside (16') of the lens (16);

- The nut (28) is attached to the lamp (14) and/or engages on the outside (14') of the lamp (14).

4. Downlight (10) according to claim 2, wherein

- The lighting means (14) has a through hole (36);

- the screw shank (26") is passed through the through hole (36); - The nut (28) on the lens (16) is fixed and / or on the outside (16 ') of

lens (16) attacks;

- the screw head (26') is fastened to the lamp (14) and/or acts on the outside (14') of the lamp (14).

5. recessed light (10) according to one or more of claims 2 to 4, wherein

- The screw (26) is designed as a knurled screw or wing screw or star knob screw; and or

- The nut (28) is designed as a knurled nut or wing nut or star grip nut.

6. recessed light (10) according to one or more of the preceding claims, wherein

- The lens (16) has an external thread;

- The housing (12) has an internal thread;

- The adjusting means (18) includes the external thread and the internal thread.

7. recessed light (10) according to one or more of the preceding claims, wherein

- the housing (12) has a first and an opposite second end region (12', 12");

- the illuminant (14) is arranged on the first end region (12') or the lens (16) is arranged on the second end region (12").

8. Recessed light (10) according to one or more of the preceding claims, wherein an inner surface of the housing (12) has a scale (40) with at least two markings.

9. recessed light (10) according to one or more of the preceding claims, wherein

- The adjusting means (18) comprises an actuating means which is arranged on or on the outside (16') of the lens (16);

- The adjusting means (18) adjustably connects the lamp (14) and the lens (16) to one another in such a way that the distance between the lamp (14) and the lens (16) can be changed with the aid of the actuating means.

10. Downlight (10) according to the preceding claim, wherein the actuating means 14 comprises a handle (26') which is arranged on or on the outside (16') of the lens (16).

11. Downlight (10) according to the preceding claim, wherein the handle (26') is knurled.

12. recessed light (10) according to one or more of claims 10 to 11, wherein

- The illuminant (14) has an external thread;

- The housing (12) has an internal thread;

- The adjusting means (18) comprises the external thread and the internal thread;

- The actuating means is attached to the lighting means (14) and has an actuating section which is arranged on the outside of the lens (16) or in an area bordering on this outside.

13. Recessed light (10) according to one or more of the preceding claims, wherein the lens (16) comprises at least one Fresnel lens.

14. Recessed light (10) according to one or more of the preceding claims, wherein the lighting means (14) comprises at least one light-emitting diode (24).

15. Recessed light (10) according to the preceding claim, wherein the lighting means (14) comprises a plurality of light-emitting diodes (24) which are arranged in at least two concentric circles.