WO2008125183A1 - Versatile asymmetric light fixture - Google Patents

Abstract

The invention relates to a light fixture having an outer envelope (1) with a predetermined inner volume in communication with the outside by an opening (12) and in which is provided at least one reflector defining, as seen in the cross section, at least a portion of an ellipse or a parabola symmetrically arranged in the inner volume. The reflector is defined by at least two inner plates (16, 17) directly with the outer envelope during the extrusion of the profile, the two inner walls being separated in the region of the top of the ellipse or parabola for accessing attachment means (24) for receiving one or more lighting members (22, 23; 25, 26, 27).

Description

 VERSATILE ASYMMETRIC LUMINAIRE

Technical area

The invention relates to a versatile asymmetric luminaire made from an extruded profile cut to the desired size.

State of the art

The luminaire according to the invention is intended to form a lighting ramp which can be used horizontally or vertically. The Applicant has already developed a large number of electrical lighting ramps described in European Patent Nos. EP0375623, EP0516578 and EP0652398. These lighting ramps may contain neon tubes of a certain length or a succession of bulbs arranged along two superimposed conductive strips having a succession of pairs of electrical contacts. to hold the bulbs. The lighting ramp or luminaire can be made from a profile preferably up to six meters in length and cut as needed. The conductive strips carrying the bulbs will advantageously be slid in rails extending over the entire length of the profile and forming part of it. In the patents mentioned above, the lighting produced by the neon tubes or by the succession of bulbs is a lighting perpendicular to the opening of the luminaire, that is to say that the light beam coming out of the luminaire is symmetrical in relation to this one. However, there are luminaires on the market made from an extruded profile for directing an asymmetric light beam by means of reflectors judiciously arranged in the luminaire frame. These types of luminaire, however, do not give very satisfactory results on the understanding that they do not allow the light beam to be concentrated where it is desired. On the other hand, they are of relatively complicated design, and require additional parts to arrange the reflectors adequately.

An example of this type of luminaire is described in US Patent 5,032,958.

The patent application published under the number JP 2000-348504 describes another type of luminaire projecting an asymmetrical light beam in which a parabolic reflector, formed in one piece, is disposed inside a substantially parallelepiped frame. However, the assembly of such a luminaire is delicate, not only from the point of view of mounting the reflector in the frame, but also for the establishment of illuminating elements after mounting the reflector.

Disclosure of the invention

The object of the present invention is to provide a luminaire made from an extruded profile which is of a simple design and manufacture and which does not necessarily require the addition and positioning of additional reflector. Advantageously, elements According to the invention, reflectors will be made from the walls of the extruded structure.

The lighting ramp or the luminaire is made from an extruded profile cut to the size desired by the user and comprises an outer envelope having a predefined interior volume communicating with the outside by means of an opening and in which is housed at least one reflector defining, in section, at least a portion of an ellipse or a parabola placed asymmetrically in the interior volume. The luminaire according to the invention is characterized in that the reflector is defined by at least two inner walls formed directly with the outer casing during the extrusion of the profile. In addition, these inner walls are disjoint in the region of the top of the ellipse or parabola to make accessible fixing means for receiving one or more lighting elements. Preferably, the ellipse or parabola may have a major axis forming an angle of approximately thirty to sixty degrees by relative to the plane of opening of the envelope, more preferably of approximately forty-five degrees.

The invention also relates to the profile for the embodiment of luminaire with its light element fixing rail placed above the top of the ellipse or parabola, the profile can be extinguished in natural or in color.

According to a preferred embodiment, the fixing means of the lighting element or elements consist of a longitudinal rail placed near the bottom of the envelope, above the top of the ellipse or parabola.

The lighting elements may comprise a power strip formed of two insulated flat conductors feeding a succession of electrical contacts supporting bulbs fixed on the strip, the latter being slid into the longitudinal rail.

The lighting elements may comprise at least one fluorescent tube held at its ends by sockets whose supports are slid into the longitudinal rail. The inner walls may have at the bottom of the casing longitudinal grooves adapted to receive a reflector whose configuration is arranged to form and close the top of the ellipse or parabola. The reflector may have along its entire length a succession of perforations intended to receive and be traversed by electrical contacts of the supply band of the bulbs.

The inner walls opening outwards, on the side of the envelope opposite the bottom, may have longitudinal grooves adapted to receive a filter, a grid or an acrylic glass closing the envelope.

The envelope of the profile may be of parallelepipedal shape and have on its lateral faces grooves for receiving luminaire fixing elements on a wall, a ceiling or in a recessed structure.

Finally, the bulbs fixed on the conductive strip may be incandescent light bulbs, XENON bulbs or LEDs. Brief description of the drawings

The drawing represents, by way of example, two embodiments as well as variants of the luminaire according to the invention.

In the drawing: - fig. 1 is a perspective view of the luminaire made from an extruded section, FIG. 2 is a section of the luminaire of FIG. 1 which has been placed against a wall above a mirror and comprising a neon tube. Fig. 3 is a section of the luminaire of FIG. 1, the luminaire being placed so as to be recessed in a corresponding opening made in a false ceiling,

Fig. 4 is a perspective view from above of the reflector introduced into the luminaire and intended to form and close the top of the ellipse or the parabola formed by the two inner walls of the luminaire, Fig. 5 is a view similar to that of FIG. 4 showing the reflector crossed by terminals for fixing and supplying the bulbs mounted in the luminaire.

Mode (s) of realization of the invention

The luminaire shown in Figures 1, 2 and 3 of the drawing is made from an extruded section 1 having four side faces 2, 3, 4 and 5 defining an outer envelope. The upper face 2, as well as the side faces 3 and 4 have grooves 6, 7 and 8 which will as explained later to fix the profile against a wall, a ceiling or in a recessed structure intended to serve as housing. The four lateral faces 2, 3, 4 and 5 of the section 1 are in the form of a rectangular parallelepiped which can be closed at its ends by a plate 9 as shown in FIG. 1 by means of the end screws 10. The end screws are introduced into housings 11 extending over the entire length of the profile 1. The grooves 6, 7 and 8 will fix or maintain the profile against a wall, a ceiling or inside a structure as shown in fig.3. An opening 12 is provided on a good part of the lower face 5, so as to release a large part of said face 5 and allow the light beam generated from the interior volume of the luminaire envelope to exit the structure. At the location of the opening 12, the luminaire will have grooves 13 and 14 for sliding a filter, a grid or an acrylic glass 15 (Figures 2 and 3). The opening 12 is adjacent to two inner walls 16 and 17 extending in the interior volume of the envelope and defining in section a portion of ellipse or parabola. The inner walls 16 and 17 are disjoint in the region of the top of the ellipse or parabola and preferably have, in this region, grooves 18, 19 for receiving a reflector 20, of rounded shape, intended to close the top of the ellipse or the parable. As shown in the figures of the drawing, the reflector 20 forms with the walls 16 and 17 of the profile an ellipse or a parabola which will open towards the opening 12 on the lower face 5 of the luminaire 1.

Note that the parabola or the ellipse formed by the inner walls 16, 17 and the reflector 20 has a major axis that forms an angle of approximately forty five degrees ^one relative to the plane of the opening. It is obvious to those skilled in the art that according to the intended use of the luminaire, the axis of the ellipse or parabola may vary within a range of thirty to sixty degrees from the horizontal or with respect to the plane of the opening of the profile 1.

The extruded section 1 is preferably made of metal, for example aluminum and can be extruded and eloxed natural or in color, or in white. It will be in the form of an elongated structure of up to six meters length determined by transport requirements and can be cut by the user to the desired dimensions. As shown in fig. 1 it can be closed at its ends by plates 9 by means of screws 10. In fig. 2, the luminaire is applied against a wall 30, so as to overcome a mirror

31 shown in FIG. 2. The profile can be slid into a not shown rail previously fixed against the wall 30, if this is possible. Alternatively, the profile 1 can be fixed to the wall by means of a not shown support fixed to the wall 30 and fixed for example in the groove 7.

An example of attachment of the profile 1 is shown in FIG. 3, where fastening lugs

32 each being in the form of an L are previously fixed against the luminaire by means of the screws 33 and nuts 34. The supports 32 rest on the inner part of a false ceiling 35 after an opening has been made in the false ceiling and that the luminaire was introduced in the vertical direction to then undergo a rotation of ninety degrees inside the opening and take the position shown in fig.3.

The reflector 20 will have a length substantially equal to the length of the profile and will be introduced into the grooves 18 and 19 placed at the vertices of the inner walls 16 and 17 of the profile. As shown in FIG. 2, the profile 1 will be used in conjunction with one or more fluorescent tubes 22 held at their ends by sleeves mounted on supports 23, themselves slid in a rail 24 extending inside the profile 1, above the reflector 20. If several neons are used in the same profile, it is obvious that perforations to pass the supports 23 must be provided in the reflector 20.

In the embodiment of FIGS. 3, 4 and 5, the lighting elements for use in the profile 1 are arranged on a power strip 25 formed of two insulated flat conductors by magnetizing a succession of electrical contacts 26 supporting bulbs 27 fixed on the strip the whole being slid into the longitudinal groove 24. In this case, the reflector 20 will present a succession of pairs of perforations

28 intended to receive the contacts 26 which are previously introduced from below on the reflector 20, the supply strips 25 being applied against the underside of the reflector 20. The whole is then slid into the grooves 18, 19 of the inner walls 16 and 17 of the profile, the conductive strips being introduced into the groove 24 after the reflector 20 is rotated relative to the conductive strips 25. As soon as the conductive strips 25 with the contacts 26 have been slid with the reflector 20 into the grooves 18, 19 and 24, the lamps 27 can be put in place and they then will find below the reflector, so that the lamps are disposed on the major axis of the ellipse or parabola in a position adjacent to the reflector 20 corresponding substantially to the focus of the ellipse or parabola.

In the case shown in FIG. 2, where a luminaire of eighty watts is placed at a height of about two meters, the illumination obtained at a distance of sixty centimeters from the wall will be one hundred and sixty lux to ten centimeters from the reflector, one thousand eight hundred lux to fifty centimeters from the reflector (approximately corresponding position at the head of a person standing), a thousand lux at one meter below the reflector and six hundred and thirty lux at one meter and fifty meters from the reflector. A person standing sixty centimeters away from the reflector will be perfectly illuminated. In the same way, always sixty centimeters from a mirror, we will have with a fluorescent fixture T5 of eighty watts at two thousand seven hundred degrees Kelvin, the luminaire being placed at twenty centimeters of the mirror and at about two meters above, a lighting from three hundred and sixty lux to ten centimeters from the luminaire, one thousand six hundred lux to fifty centimeters, one thousand two hundred lux to one meter and seven hundred and twenty lux to one meter and a half below the luminaire. In the case where the luminaire is equipped with a fluorescent tube T5 of eighty watts, two thousand seven hundred degrees Kelvin, used to illuminate a wall, the luminaire being placed at about two meters forty height and away from the wall eighty centimeters, there will be against the wall a lighting of three hundred and twenty lux ten centimeters below the luminaire, eight hundred thirty lux to fifty centimeters below the luminaire, six hundred and eighty-five lux to one meter below the luminaire, four hundred and twenty lux to one hundred and fifty centimeters, and one hundred and eighty lux to two hundred centimeters. It is noted with the two examples mentioned above that the luminaire can be used either in direct lighting or in indirect lighting against a wall to obtain a brightness quite satisfactory with a lamp of only eighty watts. The walls 16 and 17 and the reflector make it possible to direct a light beam in an extremely efficient manner.

The luminaire will advantageously be made of natural anodised aluminum for wall-mounted lighting or direct lighting on a person for example in a bathroom.

As mentioned above, the lower wall 5 of the luminaire has notches 13 and 14 for mounting a filter, a grid and / or an acrylic glass closing the envelope of the luminaire. The bulbs used and fixed on the conductive terminal are incandescent shuttle bulbs, XENON bulbs or LEDs. Alternatively the luminaires can be equipped with neon tubes of any type.

Finally the lighting elements will be placed on the axis of the ellipse or parabola between a position very close to the top of the reflector and the focus of the ellipse or parabola.

Claims

1. Versatile asymmetrical luminaire made from an extruded profile comprising an outer casing (1) having a predefined interior volume communicating with the outside of the casing by means of an opening (12) and in which is housed at least a reflector (16, 17) defining, in section, at least a portion of an ellipse or parabola asymmetrically placed in said interior volume, characterized in that said reflector is defined by at least two inner walls (16 , 17) formed directly with said outer casing during the extrusion of said profile, said two inner walls being disjoint in the region of the top of the ellipse or parabola to make accessible means of fastener (24) for receiving one or more lighting elements (22, 23; 25, 26, 27). 2. Luminaire according to claim 1, characterized in that the ellipse or the parabola has a major axis forming an angle of approximately thirty to sixty degrees with respect to the plane of said opening (12). 3. Luminaire according to claim 1, characterized in that the ellipse or the parabola has a major axis forming an angle of approximately forty five degrees ^one relative to the plane of said opening (12). 4. Luminaire according to claim 1, characterized in that said means for fixing the lighting element or elements (22, 23; 25, 26, 27) comprise a longitudinal rail (24) placed at the bottom of the interior volume of said envelope. outside (1), near the top of the ellipse or the parable. 5. Luminaire according to claim 4, characterized in that the lighting elements comprise a power strip (25) formed of two insulated flat conductors feeding a succession of electrical contacts (26) supporting bulbs (27) fixed on said feeding belt (25), the latter being slid into said longitudinal rail (24). 6. Luminaire according to claim 4, characterized in that said lighting elements comprise at least one fluorescent tube (22) held at its ends by sockets whose supports (23) are slid into said longitudinal rail (24). 7. Luminaire according to claim 1, characterized in that said inner walls (16, 17) have at the bottom of the inner volume of said outer casing (1) longitudinal grooves (18, 19) adapted to receive a reflector (20) of which the configuration is arranged to form and close the top of the ellipse or parabola. 8. Luminaire according to claims 5 and 7, characterized in that the reflector (20) has, along its length, a succession of perforations (28) for receiving and being traversed by electrical contacts (26) of said strip power supply (25) of the bulbs (27). 9. Luminaire according to claim 1, characterized in that said inner walls (16, 17) have, in the region of said opening (12), longitudinal grooves (13,14) adapted to receive a filter, a grid or an acrylic glass (15) for closing said outer casing (D 10. Luminaire according to claim 1, characterized in that said outer casing (1) is substantially of parallelepipedal shape and comprises at least one outer face having at least one groove (6, 7, 8) intended to receive fastening elements ( 32) of the luminaire on a wall, ceiling or in a built-in structure. 11. Luminaire according to claim 5, characterized in that said bulbs (27) are incandescent shuttlecocks, XENON bulbs or LEDs. 12. Extruded profile, intended for producing the luminaire according to claim 1, comprising An outer casing (1) having a predefined inner volume communicating with the outside of the casing by means of an opening (12) and comprising at least two inner walls (16, 17) defining, in 10, at least a portion of an ellipse or parabola placed asymmetrically in said interior volume, said section having a light element fixing rail placed above the top of 15 the ellipse or parabola.