FR3060709A1 - ENCLOSURE LUMINAIRE - Google Patents

Abstract

The luminaire (10) is intended to be embedded in a recessed opening in a cladding panel, of the type comprising a member (12) for generating a luminous flux comprising at least one light source (14) with at least one a light-emitting diode and a reflecting optical element (16) for shaping the light beam emitted by the source (14), a main body (26) comprising a flange (28) bearing against the panel, delimiting an opening of emission of the light emitted by the source (14) and a structure (30) for receiving the member (12) of generation in the general form of bell, mounted on the collar. The optical element (16) comprises a wall delimiting a reflective inner surface (18l) and an outer surface (18E), the wall being configured to generate light leaks and the bell (30) is made of a material which passes through the light and is arranged on the flange (28) so that the outer surface of the reflecting optical element (16) is visible through the bell (30).

Description

060 709

62771 ® FRENCH REPUBLIC

NATIONAL INSTITUTE OF INDUSTRIAL PROPERTY © Publication number:

(to be used only for reproduction orders) (© National registration number

COURBEVOIE © Int Cl ⁸ : F21 S 8/02 (2017.01)

PATENT INVENTION APPLICATION

A1

(© Date of filing: 19.12.16. (© Priority: (© Applicant (s): LUCIBEL SA Société anonyme - FR. (43) Date of public availability of the request: 22.06.18 Bulletin 18/25. @ Inventor (s): POULAIN EMILIE and VEDRINE THIBAULT. (© List of documents cited in the preliminary search report: See the end of this brochure (© References to other related national documents: (® Holder (s): LUCIBEL SA Public limited company. ©) Extension request (s): (© Agent (s): LUCIBEL SA. © RECESSED LIGHT.

AT

FR 3 060 709 - A1 (£ /) The luminaire (10) is intended to be recessed in a recess opening in a covering panel, of the type comprising a member (12) for generating a luminous flux comprising at at least one light source (14) with at least one light-emitting diode and a reflecting optical element (16) for shaping the light beam emitted by the source (14), a main body (26) comprising a flange (28) d pressing against the panel, delimiting an opening for emitting the light emitted by the source (14) and a structure (30) for receiving the generation member (12) in the general shape of a bell, mounted on the flange. The optical element (16) comprises a wall delimiting an internal reflecting surface (181) and an external surface (18E), the wall being configured to generate light leaks and the bell (30) is made of a material which lets through light and is arranged on the flange (28) so that the external surface of the reflecting optical element (16) is visible through the bell (30).

Recessed luminaire.

The present invention relates to the field of electrical lighting of premises equipped with covering panels, such as false ceilings, in particular for tertiary or industrial premises. The invention relates more particularly to lighting fixtures intended to be recessed through such covering panels.

Generally, a covering panel, for example a false ceiling panel, is spaced by a given height from a ceiling of a room, allowing the housing of the lighting device inside this space. . The false ceiling then has a recess opening of a given shape, intended to allow the recessing of the lighting fixture and its connection to a network of electric cables.

In particular, the lighting fixture includes a light source associated with a reflector and a heat sink.

The lighting fixture, which will be referred to subsequently as "luminaire", is conventionally retained by pressure through the covering structure. To this end, the luminaire comprises means for retaining, for example spring loaded, the luminaire on the ceiling.

The luminaire conventionally has a light source and an optical element for shaping the light flux such as for example a reflector. The function of the reflector is to reflect the light produced by the light source in a predetermined orientation.

During their manufacture, the luminaires are subject to numerous quality controls. In particular, it is important to check the operation of the luminaires for a certain period before they are switched on.

The luminaires are then continuously supplied with electricity and are placed on a control bench. In order to avoid the glare of the control operators, the luminaires are arranged on the illuminating side against the bench. The operator must then return them one by one regularly to check that each of the luminaires correctly emits a light flux.

This operation results in a loss of time and the glare of the operator when the luminaire is turned over causes persistent eye discomfort after the control operations.

The object of the invention is therefore to provide a luminaire which facilitates control operations while being particularly aesthetic and simple to manufacture.

To this end, the invention relates to a luminaire, intended to be recessed in a recess opening of a covering panel, of the type comprising:

a member for generating a light flux comprising at least one light source with at least one light-emitting diode and a reflecting optical element for shaping the light beam emitted by the source,

a main body comprising a support flange against the panel, delimiting an emission opening for a main light flux emitted by the source and a structure for receiving the generation member in the general shape of a bell, mounted on the flange, characterized in that the optical element comprises a peripheral wall delimiting an internal reflecting surface and an external surface, the wall being provided with at least one orifice for the passage of a secondary luminous flux and in that the bell is made in a material which lets light through and is arranged on the flange so that the external surface of the reflecting optical element is visible through the bell.

Thanks to the invention, the external surface of the wall of the optical element being visible through the bell, the secondary luminous flux coming from the optical element, passes through the bell.

During production tests, the secondary luminous flux which passes through the bell provides sufficient indication to the operator as to the correct functioning of the luminaire. This saves a lot of time since it is no longer necessary to return each luminaire to check that it is working properly.

This secondary luminous flux also illuminates the false ceiling. This secondary lighting, although weak, allows maintenance operations to be carried out without the need for additional lighting sources.

Furthermore, it has surprisingly appeared that the orifices in the wall of the optical element improve the quality of the main light flux generated through the opening of the collar.

Indeed, the secondary luminous flux which is discharged by the bell is not reinjected inside the optical element which avoids multiple reflections which "pollute" the principal luminous flux.

The role of the reflector type optic is to best control the light emitted by the light source and to direct it in the direction of the desired surface to be illuminated.

A device according to the invention may also include one or more of the characteristics described below.

In a preferred embodiment, the bell has a general hemispherical or frustoconical shape having open proximal and distal ends and delimiting a hollow body inside which the optical element extends.

In a preferred embodiment, the opening has a width of less than one millimeter, preferably less than 0.5 millimeter.

Preferably, the light source is disposed at the proximal end of the bell.

In another preferred embodiment of the invention, the reflector is a segmented reflector with a plurality of segments of reflecting surface comprising interstices between the segments to allow light to pass through.

In a preferred embodiment, the reflector has a substantially polygonal shape and includes a plurality of reflective surface segments configured to produce a photometric light distribution pattern in a desired orientation.

Preferably, the member comprises a heat sink for removing the heat generated during the operation of the light source, arranged with the light source in heat transfer relationship.

In another preferred embodiment of the invention, the bell has a proximal end on which the heat sink is mounted.

Preferably, the bell is made of a transparent plastic material, for example colored transparent or translucent polycarbonate.

In another preferred embodiment of the invention, the luminaire comprises means for retaining the luminaire to the embedding structure, fixed to the main body to allow pressure to be maintained by the luminaire through the wall.

Preferably, the retaining means, for example spring loaded, are fixed to the flange and / or to the bell.

In another preferred embodiment of the invention, the parts of the luminaire chosen from the generation member and the main body are assembled by screwing.

Other characteristics and advantages of the invention will become apparent in the light of the description which follows, given with reference to the appended drawings in which:

- Figure 1 shows a perspective view of the luminaire according to the invention,

FIG. 2 represents a perspective view from below of the luminaire of FIG. 1,

- Figure 3 shows an exploded view of the luminaire of Figure 1, Figure 4 shows a view of a bell of the luminaire according to the invention.

There is shown schematically in Figure 1 a lighting device according to a first embodiment of the invention. This device is designated by the general reference 10.

In the example illustrated, the device 10 is a recessed luminaire. This luminaire 10 is commonly designated by the English terminology "downlight" and is also known by the term "ceiling light".

The luminaire 10 is thus intended to be recessed in a recess opening of a wall (not shown) of the covering panel type. The panel is for example a covering panel such as those generally used for the realization of false ceilings in industrial or tertiary premises. It goes without saying that this panel can be of vertical or horizontal orientation, for example in the case where it is a ceiling. Furthermore, the panel can have varied dimensions depending on the application without departing from the scope of the invention.

Conventionally, this panel has a visible face and an opposite hidden face. The recess opening is dimensioned to allow the insertion of luminaire 10 by vertical translation (in the case below where the panel is a false ceiling panel). The luminaire 10 has a front face intended to be at the level of the visible face of the panel in an installation position. This front face is the part that will remain visible once the luminaire is recessed. This front face can be in multiple forms, rectangular, circular, etc. without going beyond the scope of the invention.

More specifically, in the first embodiment illustrated in FIGS. 1 to 4, the luminaire 10 comprises a member 12 for generating a light flux. This member 12 is a light source 14 comprising at least one light-emitting diode.

Preferably, the member 12 also comprises an optical element 16 for shaping the light emitted by the source 14. The optical element 16 in this example comprises a reflector 16. This reflector 16 delimits an external surface 18E and a surface internal 181 reflective. However, in a variant not illustrated by the drawings, the optical element 16 may be a lens or any other element capable of transmitting light by shaping it.

This optical element 16 comprises a wall 18 delimiting an internal reflecting surface 181 and an external surface 18E. According to the invention, the wall 18 of the reflector 16 is configured to allow light to pass through. To this end, the wall 18 is provided with at least one orifice 22 allowing a secondary light flux to pass and preferably several orifices 22. These orifices 22 have dimensions of small width, for example less than 1 millimeter and preferably less at 0.5 millimeter.

The reflector 16 is, in the example described, a segmented reflector with a plurality of segments 20 of reflecting surface comprising interstices 22 between the segments 20 to allow part of the light emitted by the light source 14 to pass. These interstices 22 form orifices 22 of the wall 26 of the reflector 16.

The reflector 16 has in the example illustrated, a substantially polygonal shape and comprises a plurality of segments 20 of reflective surface configured to produce a photometric light distribution pattern in a desired orientation.

The reflector 16 comprises, for example, an aluminized coating on its internal surface 181.

Preferably, the member 12 also comprises a heat sink 24 making it possible to dissipate the heat generated during the operation of the light source 14. This heat sink 24 is produced for example by a set of pins of material having conductivity properties thermal (for example the pins are made of aluminum). In the example described, the source 14 is arranged in heat transfer relation with the heat sink 24.

In addition, the luminaire 10 comprises a main body 26 for receiving the member 12 which can be seen in detail in FIG. 1. This main body 26 is fixed relative to the covering panel, in a mounting position of the luminaire 10. This main body 26 comprises a support plate 28, such as a collar adapted to come at least partially to bear against the visible face of the covering panel (not shown). Thus, the main body 26 comprises a flange 28 which bears against the covering panel. The main body 26 also includes a structure 30 for receiving the generation member 12.

This structure 30 has a general bell shape and is mounted on the flange 28. This structure 30 forms a support for supporting the generation member 12.

In the example illustrated in FIG. 2, the bell 30 has a general hemispherical or frustoconical shape having proximal 32 and distal 34 ends open and delimiting a hollow body inside which the reflector 16 extends. light generation 12 is arranged on the proximal end 32. The distal end 34 of the bell 30 defines an opening of the bell 30 which substantially coincides with the main emission opening of the luminous flux of the luminaire 10.

The bell 30 is made of a material which lets the light through and is arranged on the flange 28 so that the external surface 18E of the reflecting optical element 16 is visible through the bell 30. In the example described , the bell 30 is made of a material essentially comprising transparent polycarbonate.

Preferably, the bell 30 has a peripheral wall 36 around a main axis referenced X. According to the invention, the bell 30 has a protective cover function for the reflector 16. The peripheral wall 36 of the bell 30 forms for example an open cover delimiting the peripheral wall 36. The bell 30 has an open distal end 34 opening into the embedding opening. The bell 30 is intended to extend projecting from the side of the hidden face of the covering panel.

In the example illustrated in Figures 1 to 4, the support plate 28 and the bell 30 are assembled by screwing. Alternatively, assembly can be done by gluing.

The light source 14 comprises for example a plurality of light-emitting diodes. Preferably, the light source 14 is mounted on the focal point of the reflector 16. Conventionally, this reflector 16 has the function of reflecting the light emitted by the light-emitting diodes. The reflector 16 defines a longitudinal optical axis. In this first embodiment of the invention, the optical axis of the reflector 16 substantially coincides with the main axis X of the bell 30. The light beam is reflected by the reflector 16 at an angle of emergence relative to the optical axis of the reflector 16.

In general, in its position installed in the covering panel, the bell 30 forms a projecting part which comes to extend on the side of the hidden face of the covering panel. This projecting part is therefore generally not visible from inside the room.

The luminaire 10 is conventionally retained by pressure through the covering panel. To this end, the luminaire 10 comprises, in the example, means 40 for retaining the luminaire 10 to the structure, fixed to the body 26 to allow pressure 10 to be held by the luminaire through the covering panel. These retaining means 40 are for example fixed on the bell 30 or even as in the example illustrated on the support flange 28.

These retaining means 40 are in the example described capable of being moved from an armed position folded against the bell 30 and from a position deployed by return against the hidden face of the covering panel.

Preferably, these retaining means 40 are spring loaded. They each include a spring connected to a double rod, this double rod being able to be provided at its end with a damping endpiece as illustrated in FIG. 1.

These means 40 are configured to exert pressure on the hidden face of the wall and to press the support plate 28 against the visible face.

The panel is thus clamped between on the one hand the spring retaining means 40 which exerts pressure on the hidden face of the panel and the support plate 28 which is pressed against the visible face of the panel.

FIG. 3 shows a fastener 46 forming a support for the retaining means. This fastener 46 is mounted directly on the flange 28. However, as a variant, the fastener 46 can be mounted directly on the bell 30.

The fastener 46 includes a hole 42 for receiving one of the springs of the retaining means 40 for fixing it to the wall 26. The hole 40 has two pins 44 extending transversely projecting inside the reception hole 42 These two tenons 44 define an axis of rotation around which the spring of the retaining means 40 is articulated. The hole 42 thus has in this example a general shape of double T. The spring is held by the two tenons which are intended to be engaged inside the spring by its two free ends.

The flange 28 also delimits a central light outlet orifice. This orifice can have any kind of shape and the support plate 28 also. However, preferably and as illustrated in FIGS. 1 to 4, the support plate 28 has the shape of a circular disc and the central orifice 42 is concentric. The support plate 28 thus has a general shape of a collar. Furthermore, the central orifice 42 is preferably disposed opposite the outlet of the reflector 16. This central orifice 42 may also have a diffuser 48 allowing diffuse transmission of the light flux emitted by the light-emitting diodes composing the light source.

In the example illustrated in FIG. 4, the bell 30 has a peripheral wall of revolution around the optical axis. Of course, other forms may be suitable without departing from the scope of the invention. The bell 30 may for example have a rectangular shape.

The luminaire 10 also comprises, in the example described, a diffuser 50. The luminaire 10 also comprises, for example, a ring 48 for retaining the elements of the luminaire 10. The ring 48 is, for example, a sealing ring.

We will now describe the main aspects of the invention with reference to Figures 1 to 4.

Beforehand, the bell 30 and the member 12 are connected together with the support flange 28 by screwing.

Finally, during an installation step not illustrated in the figures, the installer positions the luminaire 10 by folding the retaining means 38 against the wall 26 of the main body 24 and passing the assembly through the opening. Once the retaining means are inserted through the embedding opening, the latter, no longer retained by the installer, naturally deploy against the hidden face of the panel. The support plate 28 is then held against the visible face of the covering panel by pressure.

When the light source is electrically supplied, a secondary light flux filters through the interstices 22 of the reflector. This has a particularly aesthetic effect and also makes it easier to control the luminaires.

Of course, other embodiments are possible without departing from the scope of the invention. Thus, various modifications can be made by a person skilled in the art to the invention which has just been described by way of example.

Claims (12)

1. Luminaire (10), intended to be recessed in a recess opening in a covering panel, of the type comprising: - a member (12) for generating a light flux comprising at least one light source (14) with at least one light-emitting diode and a reflecting optical element (16) for shaping the light beam emitted by the source (14 ), - a main body (26) comprising a flange (28) bearing against the panel, delimiting an emission opening of a main light flux emitted by the source (14) and a structure (30) for receiving the member (12) of general bell-shaped generation, mounted on the collar, characterized in that the optical element (16) comprises a peripheral wall delimiting an internal reflecting surface (18I) and an external surface (18E), the wall comprising at least one orifice (22) for passage of the light and in that the bell (30) is made of a material which lets the light through and is arranged on the flange (28) so that the external surface of the reflecting optical element (16) is visible through the bell (30). 2. Luminaire (10) according to the preceding claim, in which the orifice (22) has a width of less than one millimeter, preferably less than 0.5 millimeter. 3. Luminaire (10) according to any one of the preceding claims, in which the bell (30) has a general hemispherical or frustoconical shape having proximal (32) and distal (34) ends open and delimiting a hollow body at the inside of which the optical element (16) extends. 4. Luminaire (10) according to the preceding claim, wherein the light source (14) is arranged at the proximal end (32) of the bell (30). 5. Luminaire (10) according to the preceding claim, wherein the reflector (16) is a segmented reflector with a plurality of segments (20) of reflecting surface comprising interstices (22) between the segments (20) forming orifices (22) passage of the light from the wall (18). 6. Luminaire (10) according to the preceding claim, in which the reflector (16) has a substantially polygonal shape and comprises a plurality of segments (20) of reflecting surface configured to produce a photometric light distribution pattern in a desired orientation. 7. Luminaire (10) according to either of the preceding claims, in which the member (12) comprises a heat sink (24) making it possible to dissipate the heat generated during the operation of the light source (14 ), arranged with the light source (14) in heat transfer relation. 8. Luminaire (10) according to the preceding claim, wherein the bell (30) has a proximal end (32) on which is mounted the heat sink (24). 9. Luminaire (10) according to any one of the preceding claims, in which the bell (30) is made of a transparent plastic material. 10. Luminaire (10) according to any one of the preceding claims, comprising means (40) for retaining the luminaire (10) to the embedding panel, fixed to the main body (26) to allow pressure to be maintained by the luminaire. (10) through the panel. 11. Luminaire (10) according to the preceding claim, wherein the retaining means (40), for example spring loaded, are fixed on the flange (28) and / or on the bell (30). 12. Luminaire (10) according to any one of the main claims, in which the generation member (12) and the main body (6) are assembled by screwing. 1/4 ι X