EP2772680B1 - Rotary electric lighting apparatus - Google Patents

Description

TECHNICAL FIELD OF THE INVENTION

The present invention relates to a rotating lighting electrical apparatus, of the type to be fixed on a wall such as a wall or a ceiling, to orient a beam of light.

STATE OF THE PRIOR ART

The problem of the orientation of a light beam of lighting electrical equipment, and in particular to fix on a wall already knows several solutions.

The document EP 1 677 044 A1 discloses in particular an electrical apparatus according to the preamble of claim 1.

As such, it is generally known electrical devices such as recessed spots in a wall or ceiling, having a light source mounted in a pivoting structure and manually adjustable by a user can then change the orientation of the luminous flux.

These recessed spots are generally mobile around two or three axes of rotation.

However, a full or greater rotation of 360 ° remains difficult or impossible, since the connecting electrical wires supplying the light source prevent rotation of the assembly and do not make it possible to modify the orientation of the light flow as required.

To avoid the premature degradation of these electrical wires supplying the light source, it is known to limit the amplitude of the rotation of the pivoting structure by placing movement stops.

However, as a safety measure these stops are placed so that they further limit the range of motion allowed to guide the flow.

Moreover, such products have another drawback which is that of illuminating an environment by a direct flow of light, this may irritate the eyes of any user in this environment.

SUMMARY OF THE INVENTION

The device described later aims to remedy all or part of the drawbacks of the state of the art and in particular to simply and reliably produce lighting electrical equipment on a wall, easy to use and whose orientation of the luminous flux is simple and has increased amplitude without damaging the electrical mechanism, especially the electrical son.

According to one aspect of the invention, an illuminating electrical apparatus according to claim 1, which has in particular a fixed part and a mobile part, is proposed: the fixed part intended to be fixed to a wall and comprising a mechanism for electrical apparatus, which mechanism comprises at least one light source located at one of its surfaces for generating one or more beams of light, said surface defining a reference plane; a moving part comprising at least one base, an optical element and means for directing the beam (s) of light towards the optics;
the apparatus comprising at least one means for connecting the mobile part to the fixed part so that the mobile part is rotatable relative to the fixed part at its base.

Such electrical equipment makes it possible to overcome any rotation of the light source and, a fortiori, any twisting of the electrical son that feeds electricity. Thus, the rotation of the moving part relative to the fixed part has the double advantage of not having any mechanical stress which would be likely to degrade the power supply and thus to allow a greater amplitude of orientation of the luminous flux and, on the other hand, the moving part having a reflector, it prevents a direct stream of light irritates the eyes of users.

In a particular configuration, the movable part can rotate indefinitely in one or the other direction along at least one axis of rotation. Indeed, the electrical son not being solicited during rotation, preventive stops are not necessary and the rotation of the movable portion relative to the fixed part can be endless.

According to an advantageous technical characteristic, the connecting means form a pivot connection, along an axis substantially orthogonal to the reference plane, between the mobile part and the fixed part.

It is understood by a "pivot connection", a connection leaving free a single degree of freedom corresponding to a rotation about an axis, said axis being in this case the axis orthogonal to the reference plane.

Advantageously, the connecting means comprise, without limitation, a connecting ring intended to be fixed to the fixed part by forming, in an assembled position, a guide channel in which a substantially circular flange of the base of the part mobile is guided to ensure the rotation of the movable portion relative to the fixed portion about the axis orthogonal to the reference plane.

The substantially circular collar may be continuous or discontinuous. Indeed, it may be alternately formed by portions of intermediate flanges or protruding lugs arranged in a circular contour of the base and adapted to be guided in said guide corridor to ensure rotation.

Such a guiding groove forming a guiding means in particular allows said rotation of the mobile part with respect to the fixed part along this axis. This also eliminates other fastening means such as screwing.

In an alternative embodiment, the mobile part may have, on its base having a circular shape, one or more elastic tabs forming clip (s) and arranged (s) to ensure the clipping of the movable part to the fixed part, and more specifically on a substantially circular guide rail of the fixed part.

Furthermore, independently of the preferred guide means, corridor or guide rail, the infinite rotation is preferably performed by a closed contour of said guide means.

According to another particular characteristic, the means for directing the light flux towards the optics comprise a main reflector.

Such a main reflector is preferably located at a distance from the at least one light source and facing it (s). In other words, the reflector is located in a space at the front of the at least one light source, that is to say still, axially distant, with respect to the axis orthogonal to the reference plane, the light source (s), on the emergent side of the luminous flux.

In such a configuration, the luminous flux visible to the user comes only from the rays emerging from the main reflector and not directly from the light source (s).

Advantageously, the main reflector has at least a first and a second reflection wall arranged such that, in an assembled position, the first wall is closer to the reference plane than the second wall, the first and second walls being respectively inclined at a first and a second angle to the reference plane, the second angle being larger than the first angle. Such a configuration makes it possible in particular to better distribute the luminous flux.

Preferably each of these walls are flat. However in other configurations all or part of these walls may be substantially parabolic.

Advantageously, the first angle is substantially between 40 and 70 degrees and preferably substantially equal to 45 degrees, the second angle being strictly greater.

• le rayon émergeant de la première paroi est alors dirigé sensiblement parallèlement à la paroi murale ; et
• le rayon émergeant de la deuxième paroi est dirigé de sorte qu'il s'éloigne du mur.

In the configuration where the first angle is equal to 45 degrees, and for example for illuminating electrical equipment arranged to be fixed on a wall wall and where the mechanism is embedded in the wall so that the reference plane for example coincides substantially with the wall wall:

• the radius emerging from the first wall is then directed substantially parallel to the wall wall; and
• the ray emerging from the second wall is directed so that it moves away from the wall.

According to a particular technical feature, the optics of the moving part have streaks to change the orientation of the light flux of the reflector.

Advantageously, these striations are configured to change the orientation of the luminous flux between 10 and 30 degrees, for example 15 and / or 25 degrees.

Advantageously, and in an assembled position, the striations are each included in planes parallel to the reference plane.

Such a characteristic makes it possible to cover a lighting zone of greater magnitude. These angle values are chosen so as to most effectively cover a predetermined lighting area while providing the best light intensity.

According to another characteristic, the fixed part has a cover arranged to be traversed by the flow of light, the cover having on the side of the at least one light source, at least one collimating optics arranged to be traversed by the light flow of the at least one light source and to collimate the rays of the luminous flux.

Such collimating optics makes it possible in particular to be able to direct most of the light flux towards the main reflector so as to improve the luminous intensity of the lighting electrical equipment. Preferably, all the light flux emanating from the light source (s) is collimated towards said reflector.

Advantageously, the cover has an outer surface carrying a structure comprising an arrangement of a plurality of micro-cavities, preferably micro-spheres, for mixing the colorimetric spectrum of the light sources.

More specifically, in the general case where an optic is disposed in the path of a stream of light rays, it has diopters, that is to say that it has at least locally surfaces separating transparent media different refractive indices.

However, when the stream of continuous spectrum polychromatic light passes through such an optic, said light is then dispersed, that is to say that results in a separation of the basic colors. This is the implementation of the Snell-Descartes law for refraction. This results for the user, a heterogeneous illumination, whose colors are scattered.

In addition, some light sources produce a white light by the emission of rays of different distinct colors and their mixture forming a white light. This is for example the case for light emitting diode (LED) structures. Indeed, most white LEDs consist of a chip emitting blue light surrounded by a yellow phosphor, which converts a portion of the blue radiation into yellow radiation. The superposition of blue and yellow produces white light. Now the light sources form an image that can be returned by the optics so that the result is a heterogeneous illumination for the user.

Such an effect is all the more important when collimation means tend to produce an image at infinity of the emitting area of the LEDs. A projected and enlarged image of the internal structure of the LED is then observed on the illuminated surface with all the heterogeneities it contains, ie a blue central zone corresponding to the chip surrounded by a yellow halo corresponding to the phosphor layers. The collimation means thus tend to disperse the light and the result is a heterogeneous illumination.

Said microcavities placed on the outer surface of the cover thus have the role of mixing the different light rays which, at the exit of the optics, would present a color decomposition, that this decomposition of the color is due to a projection of an image of distinct light sources, for example because of the collimating optics, or that it is due to the refraction of the luminous flux itself after having passed through the cover.

Such micro-cavities thus make it possible to smooth and homogenize the color of the illuminated surface while increasing the intensity of the luminous flux, that is to say to improve the uniformity of illumination and the rendering of the colors.

Each of the micro-cavities behaves as a convergent or divergent diopter: the light rays of the light flux decomposed at the input of each microstructure are transformed by refraction into light rays having an angular extension of a few degrees.

This results in a mixture of the base colors at the outlet of the cover provided on its outer surface with such a surface arrangement of micro-cavities.

The luminous flux at the exit of the surface arrangement of micro-cavities will then be more homogeneous. The user will thus be able to benefit from a white luminous flux instead of a luminous flux whose basic colors have been dispersed and which would have resulted in a lighting having, for example, colored halos.

Moreover, such a more uniform illumination makes it possible to limit eye fatigue for the user.

Advantageously, the base of the movable portion has a closed contour defining an opening, said base further comprising a hub cap. This trim hub preferably has, with the optics, a dome shape within which the main reflector is located.

When lighting electrical equipment is installed, its fixed part is preferably housed in the wall wall and the surface carrying light sources is substantially flush with said wall. Advantageously, the cover covers this surface. The mobile part is itself linked by its base to the fixed part, the opening of the dome shape comes opposite the surface carrying the light sources while the base delimiting the periphery of this opening comes substantially in contact with the least one surface of the fixed part, preferably located on the lid. In a configuration, to remove any translation of the moving part in the reference plane and to block the translation of the movable portion along the axis perpendicular to the reference plane, the ring is clipped on the fixed part.

• la première extrémité présentant une ouverture de diamètre intérieur strictement inférieur au diamètre extérieur de la collerette de la base de la partie mobile de sorte que, lorsque la bague est clipsée sur la partie fixe, cette première extrémité vient contre cette collerette, cette dite collerette étant alors guidée dans un couloir de guidage formé par cette première extrémité de la bague et la partie fixe; et
• la deuxième extrémité présentant une forme cylindrique dont un diamètre intérieur est adapté pour coopérer avec les bords du couvercle et assurer sa fixation avec cette dite partie fixe.

This ring-shaped ring may have a first and a second end:

• the first end having an opening of inside diameter strictly smaller than the outside diameter of the collar of the base of the movable part so that, when the ring is clipped on the fixed part, this first end comes against this collar, said collar being then guided in a guide corridor formed by this first end of the ring and the fixed part; and
• the second end having a cylindrical shape whose inner diameter is adapted to cooperate with the edges of the lid and ensure its attachment with said fixed part.

• supprimer toute translation de la partie mobile dans le plan de référence au moyen d'une paroi de la première extrémité dressée sensiblement axialement suivant l'axe orthogonal au plan de référence et délimitant l'ouverture de ladite première extrémité de façon sensiblement circulaire, cette paroi assurant latéralement, ou radialement par rapport à cet axe, le blocage de la partie mobile par rapport à la partie fixe ; et
• bloquer la translation de la partie mobile selon l'axe perpendiculaire au plan de référence au moyen de la première extrémité venant contre une surface supérieure de la collerette, en la recouvrant axialement.

More specifically, the ring is arranged for:

• remove any translation of the moving part in the reference plane by means of a wall of the first end erected substantially axially along the axis orthogonal to the reference plane and delimiting the opening of said first end substantially circularly, this wall ensuring laterally, or radially with respect to this axis, the locking of the mobile part relative to the fixed part; and
• block the translation of the movable portion along the axis perpendicular to the reference plane by means of the first end against an upper surface of the collar, covering axially.

According to another aspect, the invention relates to an assembly comprising illuminating electrical equipment as described above, and a mounting box intended to be fixed to the wall and arranged to house therein said lighting electrical equipment so as to ensure the fixing of said equipment to the wall.

In a particular configuration, the recess box is arranged to provide thermal insulation of the lighting apparatus with an external environment.

Indeed, such lighting equipment can, during their use, release a significant heat. This is particularly the case when the light sources are LEDs or OLEDs.

Thus, the presence of insulation means makes it possible to create a thermal bridge between the electrical equipment mechanism and its external environment, for example the interior insulation of a wall or a ceiling.

In the case where the wall is a ceiling, it is generally known to use ceramic flower pots to create such a thermal bridge and ensure the safety of a home.

In our case, such a recess box forming an insulation means makes it possible to ensure the safety of the dwelling by its insulation while presenting a low compactness.

Advantageously, such a housing is composed of two materials: polypropylene (PP) and polystyrene-b-poly (ethylene-butylene) -b-polystyrene (SEBS). More generally this embedding box may be formed of one or more materials, preferably a plastic material and a polystyrene material.

The invention is described in the foregoing by way of example. It is understood that the skilled person is able to realize different embodiments of the invention, for example by combining different characteristics taken alone or in combination according to his need, without departing from the scope of the invention .

BRIEF DESCRIPTION OF THE FIGURES

• figures 1a et 1b, des vues en perspective éclatée d'un appareillage électrique éclairant selon un mode de réalisation ;
• figure 2, une vue en perspective d'une partie mobile, d'un couvercle d'une partie fixe et d'un moyen de liaison selon ce mode de réalisation ;
• figures 3a et 3b, des vues en perspectives d'un appareillage électrique éclairant dans une configuration assemblée selon ce mode de réalisation ;
• figure 4, une vue en perspective d'un appareillage électrique éclairant dans une configuration assemblée, d'un support et d'un boitier d'encastrement pour sa fixation sur une paroi selon ce mode de réalisation ;
• figures 5a, 5b et 5c, respectivement des vues de droite et de face d'un appareillage électrique éclairant dans une configuration assemblée selon ce mode de réalisation, la figure 5c représentant une vue en coupe de cet appareillage ;
• figure 6, une vue en coupe d'un appareillage électrique éclairant dans une configuration assemblée selon ce mode de réalisation dans laquelle est représenté le parcours d'un rayon de lumière ;
• figures 7a, 7b et 7c, une vue partielle en perspective des sources lumineuses de la partie fixe et d'une partie d'un couvercle et deux vues, l'une en perspective et l'autre en coupe, d'une structure micro-sphérique selon un mode de réalisation ;
• figure 8, une vue en coupe de ces sources lumineuses et du couvercle de la partie fixe dans laquelle des rayons de lumières sont représentés selon ce mode de réalisation ;
• figure 9, une vue en coupe de ces sources lumineuses et du couvercle de la partie fixe dans laquelle des rayons de lumières sont représentés selon un autre mode de réalisation ;

Other features and advantages of the invention will emerge on reading the description which follows, given solely by way of example, with reference to the appended figures, which illustrate:

• figures 1a and 1b exploded perspective views of an illuminating electrical apparatus according to one embodiment;
• figure 2 a perspective view of a moving part, a cover of a fixed part and a connecting means according to this embodiment;
• Figures 3a and 3b perspective views of illuminating electrical equipment in an assembled configuration according to this embodiment;
• figure 4 , a perspective view of an illuminating electrical apparatus in an assembled configuration, a support and a mounting box for its attachment to a wall according to this embodiment;
• Figures 5a, 5b and 5c , respectively right and front views of an illuminating electrical apparatus in an assembled configuration according to this embodiment, the figure 5c showing a sectional view of this apparatus;
• figure 6 a sectional view of an electrical apparatus illuminating in an assembled configuration according to this embodiment in which is shown the path of a ray of light;
• Figures 7a, 7b and 7c , a partial perspective view of the light sources of the fixed part and a part of a cover and two views, one in perspective and the other in section, of a microspherical structure according to an embodiment ;
• figure 8 a sectional view of these light sources and the cover of the fixed part in which rays of light are represented according to this embodiment;
• figure 9 a sectional view of these light sources and the cover of the fixed part in which rays of light are represented according to another embodiment;

For the sake of clarity, identical or similar elements are marked with identical reference signs throughout the figures.

DETAILED DESCRIPTION OF AN EMBODIMENT

The Figures 1-8 illustrate figures of all or part of an illuminating electrical apparatus according to one embodiment.

• la partie fixe 2 est destinée à être fixée à une paroi et comprend un mécanisme 4 d'appareillage électrique et une pluralité de sources lumineuses 5, au nombre de douze, pour générer un flux de lumière, ces sources lumineuses 5 étant portées par une surface du mécanisme 6, cette surface définissant un plan de référence P ; et
• la partie mobile 3 comprend une base 7, une optique 8 et des moyens pour diriger le flux de lumière vers l'optique 8.

The electrical equipment comprises a fixed part 2 and a mobile part 3 such that:

• the fixed part 2 is intended to be fixed to a wall and comprises a mechanism 4 of electrical equipment and a plurality of light sources 5, twelve in number, to generate a light flow, these light sources 5 being borne by a surface the mechanism 6, this surface defining a reference plane P; and
• the mobile part 3 comprises a base 7, an optic 8 and means for directing the light flux towards the optics 8.

The light sources 5 are here light emitting diodes (LEDs) but can alternatively be organic light emitting diodes (OLED).

The apparatus 1 further comprises a connecting means 9, here comprising a ring 10, for connecting the mobile part 3 to the fixed part 2 so that the mobile part 3 is rotatable relative to the fixed part 2 at its base 7. In this embodiment, the only degree of freedom allowing rotation of the movable portion 3 relative to the fixed portion is along the axis X orthogonal to the reference plane P defining a pivot connection.

The optic 8 of the mobile part 3 is integral with the base 7, the optics 8 forming with a hub cap 21, when assembled one with the other, a dome. This assembly of the hub cap 21 on the base 7 with the optics is carried out by means of three resilient tabs 210 forming a clip, a central tab and two lateral tabs for its clipping on the base 7, and an upper notch at the top of the plate. dome to cooperate with the optics 8.

The base 7 of the movable portion 3 has a closed inner contour defined here by the flange 12 defining an opening 20. The optic 8, the hubcap 21 and the base 7 together define an interior space at the dome, this interior space opening at level of opening 20.

Furthermore, a main reflector 13 for directing the light flow to the optics 8 is arranged to be inserted and fixed in the interior space of the dome. This main reflector 13 may be alternately inserted into this interior space after assembly of the dome or fixed beforehand for example at an inner wall of the hubcap 21 before assembly. Its attachment in the dome structure can be by embedding, clipping and / or bonding. A lower edge is preferably fixed in the vicinity of the base 7 and an upper edge is fixed in the vicinity of the tip of the dome, the main reflector 13 is then hidden by the hubcap 21. When the movable part 3 and the fixed part 2 are connected to each other, the main reflector 13 is then aligned axially with the light sources 5 and arranged opposite them. Said main reflector 13 is here monobloc.

When the apparatus 1 is assembled, the luminous flux coming from the light sources 5 passes through the opening 20 of the mobile part 3, is redirected by the main reflector 13, the reflected rays then being oriented towards the optics 8 which is transparent for let the flow of light pass.

More precisely in this embodiment, the main reflector 13 has a first reflection plane 13a and a second reflection wall 13b and arranged in such a way that, in the assembled position, the first wall 13a is closer to the reference plane P than the second wall 13b, the first and second walls 13a, 13b being inclined respectively according to a first α ₁ and a second angle α ₂ with respect to the reference plane P (see figure 6 ), the second angle α ₂ being larger than the first angle α ₁ .

Here the first angle α ₁ of the first wall 13a is equal to 45 degrees. In the case where the light sources 5 are directed substantially along the axis X, and the reference plane P being substantially parallel to a surface of the wall, the rays reflected by said first wall 13a of the main reflector 13 are then substantially parallel to the wall surface. This is explained by the Snell-Descartes law for reflection, applied to this configuration in which the angle of incidence is 45 degrees, the angle of reflection is 45 degrees, the radius then being deviated from the sum from these angles, or 90 degrees.

The second angle α ₂ of the second wall 13b having an angle greater than 45 degrees, for example 56 degrees, the rays reflected by said second wall 13b of the main reflector 13 are then further from the wall wall than the rays reflected by the first wall 13a.

In this way, the luminous flux at the output of the optics 8 will be of greater amplitude and better distributed so as to cover a larger illuminated surface.

Note that the reflector may consist of two mirror planes connected by an edge or form in section, a continuous curve continuously varying the angle of the first value to the second value, or any intermediate solution.

The main reflector 13 also has side walls 13c so as to improve the intensity of the luminous flux and the efficiency of the apparatus 1. The number of walls is not exhaustive and may vary depending on the volume of the interior space of the dome, so dimensions of the optic 8 and / or cover hubcap 21. More generally, the reflector may comprise a plurality of planar walls. This said main reflector 13 is integrally housed in the dome structure.

Another alternative or complementary solution for increasing the amplitude of the surface illuminated by the optics 8 is to have, on said optics 8, ridges 14 for changing the orientation of the light flux reflected by the main reflector 13.

Here the ridges 14 are each included in planes parallel to the reference plane P, but it may be otherwise depending on the predetermined surface to illuminated.

Furthermore, the fixed part 2 has a cover 15 arranged to be fixed to a base 2 'and cover the light sources. This cover 15 is also arranged to be at least locally traversed by the light sources 5. In this example the entire cover 15 is transparent polycarbonate allowing the passage of light through.

This fixed part 2 is intended to be fixed in a wall, for example a wall or a ceiling.

The figure 4 illustrates in particular a perspective view of an assembly comprising an electrical apparatus 1 illuminating in an assembled configuration and a mounting housing 22 and a support 23 for fixing, the recess box being arranged to fix said apparatus 1 on a wall, for example a wall or a ceiling.

Indeed, in this configuration, the support 23 for fixing comprises a base 24 intended to be fixed to the mounting box 22 bordering substantially a periphery 25 of an opening 25 'of said mounting box 22, preferably oriented also axially along the axis X orthogonal to the reference plane P, so that the fixed part 2 of the apparatus 1 can cooperate detachably on the support 23 for fixing, preferably also by clipping and to be housed in said housing of recessing 22.

This embedding box 22 thus allows the fixing and / or the embedding of the fixed part 2 in the wall, said fixed part 2 being provided to be housed in a space delimited by the mounting box 22 and the support 23 of fixation.

Another function of this casing is to provide thermal insulation of the electrical equipment 1 because of the heat it can release during operation. For this, said housing 22 is composed of two materials: polypropylene (PP) and polystyrene-b-poly (ethylene-butylene) -b-polystyrene (SEBS).

Furthermore, the cover 15 has on the side of the at least one light source 5, collimating optics 16 forming means of collimation and each being arranged to be traversed by the light flow of one of the light sources 5 and to collimate rays of the associated luminous flux.

In the illustrated configuration, a collimating optic is arranged facing each of the light sources 5 (see FIG. figures 6 , 7a , and 8 ).

More specifically, the transparent cover 15 forms an optic having a body 150 forming a lens and collimation means formed by frustoconical structures 160 having each a large base and a small base, the large base being contiguous to a first side of the lens body, the small base being disposed opposite the associated light source 5.

Furthermore, the frustoconical structure 160 has a cylindrical cavity 161 opening at its small base, the cylindrical cavity 161 having a bottom 162 of substantially convex parabolic shape.

Advantageously as illustrated, this cylindrical cavity 161 is dimensioned so that its diameter is substantially that of the associated light source 5.

In this way, and as shown figure 8 , the light rays R _L of a light source 5 directed towards the bottom 162 of the cylindrical cavity 161 will be collimated in the same direction, here parallel to the axis X and the rays oriented towards the inner walls of the cylindrical cavities 161 will be reflected by the walls of the frustoconical structures 160 so that the reflected rays are substantially parallel to the X axis.

For the most eccentric light sources 5 of the center of the surface 6 carrying said light sources 5, the collimating optics are formed by frustoconical portions 160 'so as to improve the intensity of the luminous flux. These frustoconical portions 160 'are formed by structures of similar frustoconical shapes but whose revolution of shape around the X axis is strictly less than 360 degrees, for example the frustoconical portion 160' is a truncated portion of a frustoconical structure 160. They then each have a cylindrical cavity portion 161 'provided with a bottom 162'.

The figure 9 represents an embodiment in which the collimating optics 16 are arranged to orient the light rays R _L light sources 5 at a predetermined angle relative to the X axis, substantially 70 degrees in this example. These collimating optics 16 are similar to frustoconical portions 161 'described above.

On the other hand, the forming cap 15 has an outer surface 17 carrying a structure 18 comprising an arrangement of a plurality of micro-spheres 18 'for mixing the color spectrum of the light sources 5.

This outer surface 17 is flat, parallel to the reference plane P and disposed on a second side of the lens body, the second side being opposite to the first side.

These micro-spheres 18 'form means for homogenizing the light flow and may alternatively be formed by any micro-cavities making it possible to perform this function, for example micro-prisms.

Such micro-cavities 18 'are particularly advantageous in combination with collimating optics 16 and / or LEDs. Indeed, such collimating optics 16 can cause a dispersion of the light when it is polychromatic that can be corrected by the microspherical structure. In addition, said so-called collimating optics 16 tend to produce an infinite image of the emitting zone of the LEDs, the illumination offered to the user by such an apparatus being then heterogeneous.

Thanks to the micro-cavities disposed on the outer surface 17 of the cover 15, the luminous flux at the outlet of the micro-spherical structure 18 will then be more homogeneous. The user can then enjoy a white light flow instead of a luminous flux the basic colors of which have been scattered or decomposed and which result in illumination with colored halos.

These micro-cavities 18 'are arranged in a surface arrangement forming a substantially square pattern, that is to say that the centers of each of the micro-spheres 18' form regular patterns substantially square. The Figures 7b and 7c illustrate such an arrangement, the Figure 7c illustrating a sectional view of the micro-spherical structure 18 in a section plane parallel to the reference plane P.

The micro-spheres 18 'are here arranged contiguous to each other. Such a configuration offers both the advantage of homogenizing the light flow while having a sufficient amount of material in the structure 18 to ensure its mechanical strength.

Advantageously, the micro-spherical structure 18 has a spacing between micro-spheres 18 'strictly less than the radius of the microspheres, said spacing being preferably substantially between 50% and 90% of the radius of the micro-spheres 18'. In this embodiment, the micro-spheres 18 'have a radius of 0.1 mm, the micro-spheres 18' forming a square pattern, some being contiguous and others having a spacing along the diagonal of this pattern of 0 , 08 mm.

More generally one will choose a spacing, or maximum spacing, substantially between 0.05 mm and 0.5 mm and a micro-sphere radius 18 'substantially between 0.1 and 1 mm.

The light rays R _L coming from the LEDs 5 initially pass through the collimating optics 16 forming collimation means, then pass through the body 150 of the cover 15 and then pass through the micro-spherical structure 18 forming a means homogenizing the flow before passing through the opening 20 of the movable portion 3 and being reflected by the main reflector 13 towards the optic 8.

In this embodiment, the lid 15 is made of polycarbonate. In addition, the collimating optics 16, the body 150 of the cover 15 and the micro-spherical structure 18 are monobloc.

Alternatively, the micro-spherical structure 18 may be designed independently, for example in the form of a flexible film of material, which would make it possible to have such a structure 18 on pre-existing optics or lenses.

The movable part 3 is movable with respect to the fixed part 2 and connected with the X axis by means of the connecting means 9.

This rotation is more particularly carried out by means of a ring 10 of the connecting means 9, said ring 10 being intended to be fixed to the fixed part 2 by forming, in an assembled position, a guide channel 11 in which a collar 12 substantially circular of the base 7 of the movable portion 3 is guided to ensure the rotation of the movable portion 3 relative to the fixed portion 2 about this axis X.

More specifically, the base 7 of the movable portion has a closed contour defining the opening 20 of the dome shape when the hubcap 21, the optic 8 and the base 7 are secured together or assembled. Note that in this embodiment the optical 8 and the base form a single piece. Alternatively the base 7 can be formed in one piece with the hub cap 21.

To assemble the movable part 3 with the fixed part 2 of the apparatus 1, the opening 20 of the movable part 3 comes opposite the surface 6 carrying the light sources, and the base 7 is placed in contact with the plane outer surface 17 and parallel to the reference plane P, this outer surface 17 being disposed on the cover 15 of the fixed part 2.

In particular, the cover 15 has on its outer surface 17 contact surfaces 26 arranged to receive in contact with said base 7 of the movable part. The flange 12 of the base 7 abuts with these contact surfaces located in the vicinity of the edges of said cover 15. These said contact surfaces 26 are contained in the same plane parallel to the reference plane P so that the rotation of the moving part 3 with respect to the fixed part 2 is performed along the X axis orthogonal to said reference plane P.

Alternatively (not shown in the figures), the cover 15 may have on its outer surface 17, in place of the contact surfaces 26, slide portions accommodating said base 7 of the movable part. The flange of the base 7 cooperates with these portions of slides located in the vicinity of the edges of said cover 15. In such a position, the base 7 cooperates with portions of slides, these portions of slides each having a surface parallel to the reference plane forming a bottom and an axially erected surface along the X axis, such as an extra thickness, forming an edge.

In such an alternative configuration, said axially raised surfaces, or oversize, delimit cylindrical portions whose cylinder carried by these cylindrical portions is coaxial with the X axis and its diameter is substantially equal to or slightly greater than the outer diameter of the circular contour. from the base 7.

Thus, according to this alternative, where the base 7 cooperates with these slide portions, any translation of the movable portion 3 in the reference plane P is removed, the base 7 abutting internally relative to the dome shape and against the edges of the portions of slides.

Whatever the alternative chosen, to ensure the maintenance of the movable part 3 on the fixed part 2 and thus to block any translation of the movable part 3 along the axis X, the ring 10 is clipped on the cover 15 of the part fixed 2.

More specifically, in the illustrated embodiment, the annular ring 10 has a first 101 and a second 102 end.

The first end 101 has an opening 101 'of inside diameter strictly smaller than the outside diameter of the flange 12 of the base 7 of the movable part 3 so that, when the ring 10 is clipped onto the fixed part 2, this first end 101 comes against this flange 12 by covering axially. This ensures the axial locking of the movable part 3, said flange 12 being then guided in a guide groove 11 delimited axially by the first end 101 of the ring 10 and the contact surfaces 26.

Furthermore, the first end 101 has a wall 101 "erected substantially axially along the axis X orthogonal to the reference plane P and delimiting the circular contour of the opening 101 'of said first end 101. This wall is arranged to provide laterally , or radially with respect to this axis, the blocking of the movable part with respect to the fixed part.In fact, the diameter of this circular contour, that is to say still the inside diameter of the opening 101 'is equal to or slightly greater than the outside diameter of the domed shape in the vicinity of its base 7. Thus, a periphery of the dome structure of the movable portion 3 abuts externally against the wall 101 "circular contour of the opening 101 'deleting any translation in the reference plane.

The lateral blocking ensuring the coaxiality of the movable part 3 with the X axis during its rotation is allowed, in this embodiment illustrated, thanks to a ring 10 laterally forming an outer stop relative to the movable portion 3, unlike the alternative described above (not shown) in which they are extra thicknesses of the surface 17 laterally forming inner abutment relative to The advantage of the inner abutment according to the alternative is to limit premature wear of the outer surface of the movable part 3 due to the friction of the movable part 3 with the ring 10.

Furthermore, the second end 102 has a cylindrical shape whose inner diameter is adapted to cooperate with the cover 15 and ensure its attachment with said fixed portion 2 by clipping.

In this linked position, the mobile part 3 is in pivot connection with the fixed part 2 so that the only degree of free freedom is the rotation around the axis X.

This rotation is guided by the guide corridor 11 whose axial distance along the X axis between the first end 101 of the ring and the contact surfaces 26 delimits a thickness arranged both to limit the friction of the collar 12 in this case. guide corridor 11 and both to block in translation along the axis X the movable portion 3.

Clipping of the ring 10 with the fixed part 2 is here ensured by lugs 29 of the cover 15 erected radially with respect to the axis X and coming to cooperate elastically with cavities situated on an inner surface of the cylindrical shape of the second end. 102 of the ring 10.

In the linked position, the ring 10 is fixed relative to the fixed part 2, and together form the guide corridor 11. The moving part 3 is guided in rotation by its circular flange 12 whose sliding in said guide channel 11 allows infinite rotation.

The luminous flux of the apparatus 1 comes from the light sources 5, the light rays following a path substantially along the X axis through the cover 15, in particular the collimating optics 16 and the micro-spherical structure 18, then crossing the opening 20 of the movable portion 3. Once the opening 20 through, the light rays are reflected by the main reflector 13 being oriented towards the optical 8 which is transparent to let the light flow and has the streaks 14 to reflect the light rays again in a predefined direction.

The rotation of the movable portion 3 relative to the fixed portion 2 about the X axis causes the rotation of the main reflector 13 carried by the movable portion 3 and, consequently, the rotation of the reflected light flux.

This rotation can be infinite because the user chooses the orientation of the luminous flux only by the rotation of the main reflector 13 and not that of the light sources 5.

Furthermore, the main reflector 13 is located between the fixed part and the trim cover facing the light sources 5, that is to say facing them. It is located more precisely between the cover 15 and the hub cap 21 of the moving part 3. By means of the collimating optics 16, almost all of the light flux is directed towards said main reflector 13 and the light sources 5 are not directly visible to the user.

Such an apparatus also makes it possible to be compact, especially since it frees itself from any reflector located laterally to the light sources. It is as simple to made and easy to use.

The configuration as described has indeed a reduced volume of space, the mobile part comprising only one optical, a hubcap and a dome base, inside which is housed only a reflector.

Moreover, such a reflector having a sharp angle, that is to say with two oriented walls associated with an optical having reflection streaks, offers the advantage of maximizing the amplitude of the surface to be illuminated.

The collimating optics allow to improve the intensity of the light and the micro-spherical structure allows to have a uniform illumination.

The invention is described in the foregoing by way of example. It is understood that the skilled person is able to achieve different embodiments of the invention without departing from the scope of the invention.

For example, the connection of the mobile part 3 to the fixed part 2 may be alternately, and without limitation, on the cover 15 or the base 2 '.

Furthermore, the connecting means of the movable part to the fixed part may also differ while providing the same function and additional degrees of freedom allowing rotations along other axes may be provided. For example, laterally projecting lugs may be envisaged in other guideways and rotating the moving part around axes contained in the reference plane.

Finally, the dome shape can be modified according to the desired maximum volume of space, the amplitude of the surface to be illuminated, and the desired aesthetics.

Claims (7)

1. Electric lighting apparatus (1) having a fixed part (2) and a moving part (3):

   - the fixed part (2) intended to be fastened to a wall and comprising an electric apparatus mechanism (4) and at least one light source (5) for generating a flow of light, with this light source (5) being substantially carried by a surface (6) of the mechanism, with this surface (6) defining a plane of reference (P);

   - the moving part (3) comprising at least one base (7), an optical unit (8) and means for directing the flow of light to the optical unit (8), said means for directing the flow of light to the optical unit (8) comprising a main reflector (13);

   the apparatus (1) comprising at least one means of connecting (9) the moving part (3) to the fixed part (2) in such a way that the moving part (3) is mobile in rotation with respect to the fixed part (2), at its base (7),
   the electric lighting apparatus (1) being characterised in that:

   - the main reflector (13) has at least one first (13a) and one second (13b) flat reflection walls, with the first and second reflection walls being arranged in such a way that, in an assembled position, the first wall (13a) is closer to the plane of reference (P) than the second wall (13b), with the first and second walls (13a, 13b) being inclined respectively according to a first angle (α₁) and a second angle (α₂) with respect to the plane of reference (P), with the second angle (α₂) being larger than the first angle (α₁) ; and in that

   - the optical unit (8) has grooves (14) for changing the orientation of the flow of light coming from the main reflector (13), with the grooves (14) being, in the assembled position, each comprised in planes parallel to the plane of reference (P).
2. Electric lighting apparatus (1) according to claim 1, characterised in that the connection means (9) form a pivot connection, along an axis (X) substantially orthogonal to the plane of reference, between the moving part (3) and the fixed part (2).
3. Electric lighting apparatus (1) according to claim 2, characterised in that the connection means (9) comprise a ring (10) intended to be fastened to the fixed part (2) by forming, in an assembled position, a passage (11) for guiding in which a substantially circular collar (12) of the base (7) of the moving part (3) is guided in order to provide the rotation of the moving part (3) with respect to the fixed part (2) about the axis (X) orthogonal to the plane of reference (P).
4. Electric lighting apparatus (1) according to any one of the preceding claims, characterised in that the fixed part (2) has a cover (15), with the cover having on the side of the at least one light source (5), at least one collimating optical unit (16) arranged to be passed through by the flow of light from the at least one light source (5) and for collimating rays of the flow of light.
5. Electric lighting apparatus (1) according to claim 4, characterised in that the cover (15) has an external surface (17) that carries a structure (18) that comprises an arrangement of a plurality of microspheres (18'), for mixing the colour spectrum of the at least one light source (5).
6. Electric lighting apparatus (1) according to any one of the preceding claims, characterised in that the base (7) of the moving part (3) has a closed contour that defines an opening (20), and in that it comprises a trim cover (21), with the trim cover (21) having, with the optical unit (8), the shape of a dome.
7. Unit characterised in that it comprises an electric lighting apparatus (1) according to any one of the preceding claims, and an installation housing (22) intended to be fastened to the wall and arranged to house therein said electric lighting apparatus (1) in such a way as to provide for the fastening of said apparatus (1) to the wall.

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