• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    An LED lighting device (40) has a metal frame (1) extending in a main direction, so that the frame (1) has a base (10) from which protrude two wings (11, 12) , a main cover (2) of planar shape supported by the two wings (11, 12), the main cover (2). The device further comprises a support strip (4) held against the base (10) and comprising a series of LEDs (40) capable of generating light beams in an interior space (13) towards the main cover (2) Au at least one of the wings (11, 12) has at least one opening (14) extending in the longitudinal direction, each opening (14) receiving a side cover (3), and in that the device further comprises a diffuser (5) extending in the main direction in the interior space (13) and adapted to diffuse part of the light of the beams in the direction of the opening (14).
    公开号:BE1027143B1
    申请号:E20205181
    申请日:2020-03-18
    公开日:2020-10-21
    发明作者:Yann Mellano；Franck Desgranges
    申请人:Lumila；
    IPC主号:
    专利说明:

    Technical field The invention relates to an LED lighting device of the type comprising a metal frame formed from a U-section profile, the profile extending in a main direction, so that the frame has a base from which protrude two wings and is closed by a main cover of planar shape. BACKGROUND ART Lighting has been revolutionized in recent years by the availability and increasing efficiency of light emitting diodes, also called LEDs for "light emitting diodes". In some configurations, the LEDs are arranged in line at regular intervals on an elongated electronic circuit board and are supplied with electric current from the end of the board through a connector, and possibly a circuit board. power supply that adapts the voltage and current to the characteristics of the LEDs, their assembly and lighting needs.
    Some environments are aggressive and it is necessary to protect the circuit from LEDs. It is also useful to format the light beam to suit the lighting needs. It is proposed in the document CN207880617U an LED lighting device made from a frame of aluminum alloy profile generally U-shaped. The frame has a base from which protrude two wings. The LED backing plate is placed along the base with the light beams pointing away from the base. The device further comprises a cover allowing light to pass through and supported by the wings of the section. At each end, a rectangular shaped plate is provided to close the interior space and is secured by screws with an elastomer seal interposed.
    Although meeting tightness constraints, such a device has the disadvantage of only lighting at a fairly narrow angle, which does not meet all lighting needs. In particular in land vehicle maintenance workshops, with pits allowing operators to access the underside of the vehicle, such a device is advantageous for illuminating said underside by being placed on the vertical walls of the pit, but he leaves the interior of the pit in semi-darkness. This is particularly true in railway equipment maintenance workshops.
    Objectives of the invention BE2020 / 5181 It is therefore an objective to provide a very durable elongated lighting device capable of illuminating different surfaces. Disclosure of the invention With these objectives in view, the invention relates to an LED lighting device comprising a metal frame formed from a U-section profile, the profile extending in a main direction, so that the frame comprises a base from which protrude two wings, a main cover of planar shape supported by the two wings, the main cover, the wings and the base delimiting an interior space between them, the device further comprising a strip support held against the base and comprising a series of LEDs capable of generating light beams in the interior space towards the main cover, characterized in that at least one of the wings has at least one opening extending into the longitudinal direction, each opening receiving a side cover, and in that the device further comprises a diffuser extending in the main direction in the interior space and capable of diffusing part of the light e beams in the direction of the opening and widen the light beam from the main cover and the side cover respectively. Such a lighting device is suitable for use in a constrained environment, and it allows lighting of two distinct areas, for example with one beam directed upwards and another directed downwards. The diffuser placed in the light axis of the LEDs placed on the strip allows part of the flow to be directed towards the side openings to create secondary lighting. In addition, the diffuser decreases the point intensity perceptible by an observer. The risks of dazzling are reduced. Finally, we also see that the beam of lighting through the main cover is widened and varies less - steeply compared to lighting obtained directly by the LEDs of the strip. Concerning the beam coming from the openings, the presence of the diffuser makes it possible to significantly modify the direction of the luminance peak in comparison with the same device without a diffuser, with a more open angle compared to the normal to the strip. In addition, the width of this beam is much greater, which makes it possible to illuminate a wider area.
    According to a constructive arrangement, the diffuser is in a translucent or opal material. The light is diffused inside the translucent or opal material.
    According to another constructive arrangement, the diffuser is surface treated to create or complete the diffusion of light. This can be in addition to or in place of the previous provision. The support is therefore transparent or translucent.
    For example, the treatment of the surface is chosen from the group comprising sandblasting, frosting, relief in streaks, relief in prisms. These are different techniques for producing reliefs on the surface, of varying magnitude, but which have the effect of dispersing the light in different directions.
    In a constructive arrangement, the diffuser has an arch-shaped section above the strip. The arch can be an arc of a circle, an ellipse, or some similar shape. It can also be polygonal. This ensures that all the light beams emitted by the LEDs are picked up and diffused by the diffuser. The diffuser can be made of glass, but it is preferably made of a synthetic material such as polyethylene, polymethyl methacrylate or polycarbonate.
    According to an improvement, the diffuser is in elastic support between the two wings. The shape gives it elasticity so that the diffuser rests on either side against the fenders, ensuring it is held without play.
    In a complementary manner, the device comprises a power supply card arranged at one end of the device. It is thus possible to carry out the power supply while remaining in the same lateral space requirement. A power cable can be connected through one end of the device, in the extension of the longitudinal direction.
    According to an improvement, the device comprises a presence detector for switching the power supply to the LEDs according to the detection of the presence of a person. The detector can be integrated into the power supply board or be on a dedicated board connected to the strip on the one hand and to the power supply board on the other hand or directly to a connector.
    According to a constructive arrangement, the support strip is inserted into two support grooves provided in the frame facing each other. The strip can thus be held against the base, the assembly taking place by sliding in the longitudinal direction.
    According to an improvement, the support grooves further extend perpendicular to the plane of the base to form guides for electrical conductors. Depending on power requirements or electrical configuration, it may be necessary to connect the strip by conductors from end to end, or at an intermediate point. Since the strip overhangs the extension of the groove, a connector welded or attached to it can fit into the extension along the length of the device.
    According to a constructive arrangement, the device comprises latching means for fixing the main cover, the latching means comprising two parallel ribs (80) extending perpendicular to the plane of the main cover towards the interior space along the one and the other of the wings of the frame, each rib terminating in the form of a hook in engagement with a heel of the corresponding wing. The main cover is securely fastened to the frame, without any other fasteners. According to an improvement, the device comprises first sealing means comprising a receiving surface at the end of each wing, a sealing groove and a side complementary to the sealing groove carried respectively by the main cover and the surface. receiving, or vice versa, and an adhesive interposed between the main cover and the receiving surface. During assembly, the adhesive can be deposited in the sealing groove, then being pushed back by the side to spread over the receiving surface. In addition, compared to a flat surface, the contact surfaces bonded by the adhesive are increased. According to a constructive arrangement, the device comprises a flange at each end to close the interior space and second sealing means comprising a shelf carried by the flange, the shelf supporting a receiving surface, a sealing groove and an adhesive. interposed between the main cover and the receiving surface. This addresses the issue of sealing also at the ends of the device. The subject of the invention is also the use of a lighting device as described above, in which the lighting device is hung on a vertical wall of a pit for the maintenance of a land vehicle, the main direction of the device being horizontal, the beam coming from the main cover being oriented upward to illuminate the underside of the vehicle placed above the pit, and the beam coming from the side openings being oriented essentially towards the floor of the pit. The main beam is received by the underside of the vehicle on which work is carried out during maintenance. The beam coming from the side openings illuminates the area in which the operators have to move and store the tools or equipment to be assembled or already disassembled, which is a safety measure. Although the operator's eyes may be in the main beam, the diffuser greatly decreases the maximum luminance that the operator can perceive when looking at the device compared to an LED device without a diffuser. In addition, the diffuser allows a widening of the illuminated area and with a widened transition between the most strongly illuminated area and the surroundings. Lighting efficiency is particularly important. The pit is, for example, in a railway equipment maintenance workshop to allow access under a locomotive or wagon.
    Brief Description of Figures 5 The advantages and the invention and other subjects of the invention will become apparent from the detailed description which follows, in conjunction with the accompanying drawings and among which: [Fig.1]: Figure 1 is a perspective view of a device according to one embodiment of the invention; [Fig.2]: Figure 2 is a top view of the device of Figure 1; [Fig.3]: Figure 3 is an end view of the device of Figure 1; [Fig.4]: Figure 4 is a side view of a flange of the device of Figure 1; [Fig 5]: Figure 5 is a sectional view along the line V-V of Figure 1; [Fig 6]: Figure 6 is an end view of a diffuser according to an alternative embodiment. [Fig.7]: Figure 7 is a schematic view of a use of the device of Figure 1 for lighting a pit; [Fig.8]: Figure 8 is a diagram showing the relative light intensity in the case of a luminaire without a diffuser and in the case with a diffuser. Detailed Description We will now describe in detail an LED lighting device according to one embodiment of the invention, in connection with Figures 1 to 5. The device comprises a metal frame 1 formed from a profile. U-section, produced for example by extrusion of an aluminum alloy. The frame 1 extends in a main direction and comprises a base 10 from which protrude two wings 11, 12. The device further comprises a main cover 2 of planar shape supported by the two wings 11, 12, the main cover 2 , the wings 11, 12 and the base 10 delimiting between them an interior space 13. The device further comprises a support strip 4 held against the base 10 and comprising a series of LEDs 40 capable of generating light beams in space. interior 13 in the direction of the main cover 2. One of the wings 11 has openings 14 extending in the longitudinal direction F1, each opening 14 receiving a side cover 3. The device further comprises a diffuser extending in the direction main F1 in the interior space 13 and capable of diffusing part of the light from the beams in the direction of the openings 14. At a first of the ends of the device is provided a first flange 6 to close the interior space 13. To the other end 1b of the device, called the second end, is provided with a connection flange 7 comprising a cable gland 70 for the passage of a power cable, not shown.
    The frame 1 has two support grooves 15 facing each other which receive the support strip 4 so that the support strip 4 is held against the base 10. The support grooves 15 further extend perpendicular to the plane of the base 10 below the level thereof to form guides 150 for electrical conductors, not shown.
    Strip 4 comprises a series of LEDs 40 aligned in the main direction at regular intervals, for example from 3 to 6 mm.
    LEDs 40 are placed to illuminate perpendicular to strip 4, with an illumination angle typically of 100 ° to 150 °. The frame 1 further comprises two cross grooves 16 extending on the outer face of the base 10 and allowing the device to be fixed on supports, not shown.
    The main cover 2 is also made by extrusion and therefore has a constant profile.
    It is fixed on the one hand by latching means 8 comprising two parallel ribs 80 extending perpendicularly to the plane of the main cover 2 towards the interior space 13 along one and the other of the wings 11, 12 of the frame 1. The ribs 80 are integral with the main cover 2. Each rib 80 ends in the form of a hook in engagement with a heel 81 of the corresponding wing.
    Such a main cover 2 typically has an optical transmission greater than 85% measured on the stream.
    The fixing of the main cover 2 is completed by first sealing means 9 comprising a receiving surface 90 at the end of each wing 11, 12, a sealing groove 92 in the receiving surface 90 and a complementary rib 91 to the sealing groove 92 carried by the main cover 2. An adhesive is interposed between the main cover 2 and the receiving surface 90, forming an additional fixing and sealing against liquids.
    The end of each wing 11, 12 ends in a blade 110, 120 which projects from the receiving surface 90 and extends along an edge of the main cover 2 in order to protect the latter against possible impacts. .
    The lateral openings 14 are created by machining passing through the first wing 11 and are oblong in shape.
    They receive the side covers 3 fixed by adhesives at the periphery of the openings 14. The side covers 3 are for example made of polycarbonate or polymethyl methacrylate and are transparent.
    The function of the diffuser 5 is to reduce the risk of dazzling by homogenizing the light diffused by the main cover 2 and by the side openings 14. In addition, it distributes the light between the direct lighting through the main cover 2 and that through the openings
    14. It also allows the light to be spread over larger angles. For this, the diffuser 5 can be in a translucent or opal material. Alternatively or in addition, the diffuser 5 can be surface treated to create or complete the diffusion of light. To obtain a diffusing surface, you can sand the surface, that is to say a projection of particles on the surface which will deform and wear the surface irregularly. It is also possible to carry out a frosting, that is to say carrying out a chemical attack on the surface, generally based on acids and salts. It is also possible to produce a surface with reliefs, for example in ridges or in prisms, either by machining the surface, or by obtaining it directly by molding, or indirectly by marking the surface. Such a diffuser 5 typically has an optical transmission of 80% measured on the stream. The use of diffuser 5 makes it possible to increase the angle of diffusion to 50% of the light power by the upper main cover 2 by 12 ° additional compared to use without diffuser 5. Likewise, 1l makes it possible to move the axis of maximum power of the beam emerging from the lateral openings 14. In one configuration, it was measured that this angle was equal to 75 ° with respect to the normal to the band 4. The diffuser 5 has an arch-shaped section above the band 4, and more precisely a half-shape. arc of a circle, as shown in FIG. 3. The diffuser 5 is held in place because it rests resiliently between the two wings 11, 12, just above the strip 4. In this case, the diffuser 5 is made of synthetic material. Figure 6 shows a variant of the 5 ′ diffuser with grooves extending longitudinally on the inner face of the 5 ′ diffuser. The flanges are fixed by screws which pass through the flanges and are housed in semi-open grooves provided in the section of the frame 1. The screws are for example self-tapping. A seal, for example made of elastomer, is interposed between the frame 1 and each flange. In addition, each flange 6, 7 comprises a shelf 60 projecting towards the interior space 13 to extend just under the main cover 2, the shelf 60 comprising a receiving surface 600 and a sealing groove 602 of the same profile. than those of the chassis
    1 and at the same level.
    This makes it possible to complete the sealing of the interior space 13 with the adhesive which is interposed between the shelf 60 and the main cover 2. Different configurations of the device can be provided.
    The device can be designed to be supplied at very low voltage, so that the wires of a power cable, not shown, are connected mechanically or by soldering directly to the strip 4. In another configuration, the device comprises a power supply card, not shown, arranged at the second end 1b of the device.
    The power supply board also fits in the support grooves 15 in place of the strip 4 which is thus shortened.
    Provision is made for the connection of the cable to the power supply board and the connection of the power supply board and the strip 4. In another configuration, a presence detector, not shown, is also provided for switching the power supply to the LEDs. 40 according to the detection of the presence of a person.
    This detector comprises a cell oriented through one of the openings 14 or through the main cover 2 in order to receive a presence signal.
    It can be mounted with or without a power card.
    In either case, it cuts or sets up the circuit to power the LEDs 40 so as to provide illumination when a person's presence is detected.
    As shown in Figure 7, the device can be installed on a wall of a pit F so that the main flow S1 passing through the main cover 2 illuminates the underside of a vehicle V placed above the pit F.
    The axis of the normal to the strip is inclined with respect to the vertical, for example by an angle of between 30 and 45 °. The beam S2 coming from the side openings 14 then illuminates the ground of the pit F.
    Figure 8 shows a diagram representing the light intensity relative to the peak intensity as a function of the angle in a plane perpendicular to the main direction.
    The angle 0 corresponds to the normal to the strip, in the direction of illumination.
    Curve C1 represents a measurement of the band alone without a diffuser, while curve C2 represents the measurement with the diffuser in opalescent material, all other parameters being otherwise equal.
    We can see that even if the beam is more intense at the peak in the absence of a diffuser, the addition of it makes it possible to widen the illuminated area.
    In particular, while the illumination beyond 85 ° is zero without a diffuser, it stays with the consequent diffuser up to 100 ° and even extends beyond.
    If we consider the entire device, the beam passing through the main cover corresponds to angles between 0 and 45 ° and that passing through the side openings corresponds to angles ranging substantially between 70 and 110 °. In addition, the change in illumination is smaller depending on the change in the angle.
    In the case of the CI curve, a decrease of 1.85% / ° is measured, while for the C2 curve, the variation is only 0.7% / °, which decreases the contrasts.
    The embodiment has just been described by way of example only.
    The device could include openings 14 on the two wings 11, 12.
    权利要求:
    Claims (14)
    [1]
    1. LED lighting device (40) comprising a metal frame (1) formed from a U-section profile, the frame (1) extending in a main direction, so that the frame (1) ) comprises a base (10) from which protrude two wings (11, 12), a main cover (2) of planar shape supported by the two wings (11, 12), the main cover (2), the wings (11 , 12) and the base (10) delimiting between them an interior space (13), the device further comprising a support strip (4) held against the base (10) and comprising a series of LEDs (40) capable of generating light beams in the interior space (13) towards the main cover (2), characterized in that at least one of the wings (11, 12) has at least one opening (14) extending in the direction longitudinal, each opening (14) receiving a side cover (3), and in that the device further comprises a diffuser (5) extending in the main direction in the interior space ur (13) and able to diffuse part of the light from the beams in the direction of the opening (14) and to widen the light beam (S1, S2) from the main cover and the side cover, respectively.
    [2]
    2. A lighting device according to claim 1, wherein the diffuser (5) is in a translucent or opal material.
    [3]
    3. A lighting device according to claim 1 or 2, wherein the diffuser (5) is surface treated to create or supplement the diffusion of light.
    [4]
    4. Device according to claim 3, in which the treatment of the surface is chosen from the group comprising sandblasting, frosting, relief in streaks, relief in prisms.
    [5]
    S. Device according to one of the preceding claims, wherein the diffuser (5) has an arch-shaped section above the strip (4).
    [6]
    6. Device according to claim 5, wherein the diffuser (5) is resiliently supported between the two wings (11, 12).
    [7]
    7. Device according to one of the preceding claims, characterized in that it comprises a power supply card disposed at one end of the device.
    [8]
    8. Device according to claim 6, characterized in that it comprises a presence detector for switching the power supply to the LEDs (40) according to the detection of the presence of a person.
    [9]
    9. Device according to one of the preceding claims, wherein the support strip (4) is inserted into two support grooves (15) provided in the frame (1) facing each other.
    [10]
    10. Device according to claim 9, wherein the support grooves (15) further extend perpendicular to the plane of the base (10) to form guides (150) for electrical conductors.
    [11]
    11. Device according to one of the preceding claims, characterized in that it comprises latching means (8) for fixing the main cover (2), the latching means (8) comprising two ribs (80) parallel extending perpendicular to the plane of the main cowl (2) towards the interior space (13) along either of the wings (11, 12) of the frame (1), each rib terminating in the form of hook engaged with a heel (81) of the corresponding wing (11, 12).
    [12]
    12. Device according to one of the preceding claims, characterized in that it comprises first sealing means (9) comprising a receiving surface (90) at the end of each wing, a sealing groove (92 ) and a side (91) complementary to the sealing groove (92) carried respectively by the main cover (2) and the receiving surface (90), or vice versa, and an adhesive interposed between the main cover (2) and the receiving surface (90).
    [13]
    13. Device according to one of the preceding claims, characterized in that it comprises a flange (6, 7) at each end to close the interior space (13) and second sealing means comprising a shelf (60) carried by the flange (6, 7), the shelf (60) supporting a receiving surface (600), a sealing groove (602) and an adhesive interposed between the main cover (2) and the receiving surface (600 ).
    [14]
    14. Use of a lighting device according to one of the preceding claims, wherein the lighting device is attached to a vertical wall of a pit (F) for the maintenance of a land vehicle (V), the main direction of the device being horizontal, the beam (S1) coming from the main cover (2) being directed upwards to illuminate the underside of the vehicle placed above the pit, and the beam (S2) coming from the side openings (14) being oriented essentially towards the floor of the pit (F).
    类似技术:
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    FR2968382A1|2012-06-08|SAS HAVING A LIGHTING DEVICE
    FR2689613A3|1993-10-08|Wall lamp fitted with refractive lenses.
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    FR3051733B1|2019-08-23|MOTOR VEHICLE EXTERIOR DOOR SEALING SYSTEM WITH MOBILE GLASS WITH DIFFUSER OF LIGHT.
    同族专利:
    公开号 | 公开日
    BE1027143A1|2020-10-15|
    FR3094072A1|2020-09-25|
    FR3094072B1|2021-02-19|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE10351413C5|2003-10-31|2009-01-08|NORKA Norddeutsche Kunststoff- und Elektro-Gesellschaft Stäcker mbH & Co. KG|Luminaire housing, in particular for a linear luminaire|
    US7159997B2|2004-12-30|2007-01-09|Lo Lighting|Linear lighting apparatus with increased light-transmission efficiency|
    CN101498428B|2008-01-28|2010-12-08|富士迈半导体精密工业（上海）有限公司|Illuminating apparatus|
    JP4447644B2|2008-07-15|2010-04-07|シーシーエス株式会社|Light irradiation device|
    DE202013100140U1|2013-01-11|2014-04-15|Schlüter-Systems Kg|lighting system|
    DE102013110317B4|2013-09-19|2015-06-03|Insta Elektro Gmbh|lighting device|
    CN207880617U|2018-03-16|2018-09-18|中山市亮化升照明科技有限公司|A kind of wall lamp|
    法律状态:
    2020-10-28| FG| Patent granted|Effective date: 20201021 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1903018A|FR3094072B1|2019-03-22|2019-03-22|Elongated LED lighting device|
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