JP2010205501A - Lighting fixture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thin lighting fixture capable of converging light emitted from a plurality of LEDs and carrying out illumination with it in a desired direction. <P>SOLUTION: For the lighting fixture 1 provided with a fixture body 2 with an opening 8 formed for emitting light from, a substrate 14 arranged inside the opening 8 for mounting a plurality of LEDs 18, 18, 18, a panel 16 covering a whole face of the opening 8, and a panel holder 15 for holding the panel 16 and fixing it to the fixture body 2, Fresnel lenses 13 are formed over all the panel 16 area, with their condensing centers L1 shifted from respective emission centers L2 of the LEDs 18, 18, 18. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a lighting fixture.

  2. Description of the Related Art Conventionally, lighting fixtures are known that are attached to a mounting wall such as a ceiling by being embedded, directly attached, or suspended. Further, as this type of lighting fixture, one using a plurality of LEDs as a light source and a Fresnel lens as a lens is known (for example, see Patent Document 1). A Fresnel lens is usually a lens formed into an aspherical body by concentrically cutting a convex lens or a concave lens and reducing the thickness of a corner portion, and the cross-sectional shape is formed in a substantially sawtooth shape. . In the lighting fixture having such a configuration, light emitted from each LED is condensed and irradiated onto a lens provided so as to face each LED.

JP 2008-21561 A

  In order to change the light irradiation direction of such a luminaire to a direction other than the orthogonal direction, it is necessary to adjust the angle of the light source unit including the LED and the lens. However, in the case of a lighting fixture that is embedded and used, changing the angle of the lighting fixture itself to the mounting wall portion in order to change the angle of the light source portion, the lighting fixture will protrude from the mounting wall surface, It looks bad. In addition, for example, when a mechanism for adjusting the angle of the light source unit is provided in the lighting fixture, the thickness of the lighting fixture increases, and the lighting fixture is installed by embedding it in a limited space such as under the shelf. Becomes difficult.

  The present invention has been made in order to solve the above-mentioned problems, and a thin luminaire that can irradiate by condensing light in a desired direction and can be embedded and used in a narrow place. The purpose is to provide.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, in Claim 1, the instrument main body in which the opening part which radiates | emits light was formed, the board | substrate which is arrange | positioned in the said opening part and mounts several LED, and covers the whole surface of the said opening part, The said panel And a panel holder that holds the light to the fixture body, and a fresnel lens that is arranged so that the respective light collection centers are shifted from the light emission centers of the respective LEDs throughout the panel. Formed.

  In Claim 2, the said panel holder is provided with the reflective surface formed in the paraboloid.

  As effects of the present invention, the following effects can be obtained.

  According to the first aspect of the present invention, light emitted from the LED to the entire opening can be condensed by a single panel in a direction other than the orthogonal direction. Therefore, it is not necessary to provide a mechanism for adjusting the angle of the light source unit in the lighting fixture, and a thin lighting fixture capable of controlling light distribution only with a thin panel portion can be configured. Therefore, for example, a lighting fixture can be embedded and installed in a place where space is limited, such as under a shelf.

  According to the second aspect of the present invention, the light emitted in the direction other than the front of the LED is reflected forward by the panel holder on which the reflection surface is formed, and can be used effectively and can be efficiently irradiated.

The assembly figure which looked at the lighting fixture which concerns on one Example of this invention from the downward direction. The assembly drawing also viewed from above. The lower perspective view of a lighting fixture. Similarly upper perspective view. Similarly bottom view. The bottom view of the lighting fixture which represented typically the inclined surface group of the Fresnel lens. FIG. 6 is a sectional view taken along line A-A ′ in FIG. 5. Similarly B-B 'line sectional drawing. The schematic diagram which shows the irradiation direction at the time of arrange | positioning shifted the light emission center of LED, and the condensing center of a Fresnel lens. The schematic diagram which shows the irradiation direction at the time of arrange | positioning so that the light emission center of LED and the condensing center of a Fresnel lens may correspond.

Next, embodiments of the invention will be described.
1 is an assembly view of a lighting apparatus according to an embodiment of the present invention as viewed from below, FIG. 2 is an assembly view of the lighting apparatus as viewed from above, FIG. 3 is a bottom perspective view of the lighting apparatus, and FIG. 5 is a bottom view, FIG. 6 is a bottom view of a lighting fixture schematically showing a group of inclined surfaces of a Fresnel lens, FIG. 7 is a cross-sectional view taken along line AA ′ in FIG. 5, and FIG. FIG. 9 is a schematic diagram showing the irradiation direction when the light emission center of the LED and the light collection center of the Fresnel lens are shifted from each other, and FIG. 10 is the same as the light emission center of the LED and the light collection center of the Fresnel lens. It is a schematic diagram which shows the irradiation direction at the time of arrange | positioning.

  The lighting fixture 1 which concerns on the Example of this invention is demonstrated using FIGS. 1-8. The lighting fixture 1 of a present Example is embedded and installed in the round shaped attachment hole formed in the ceiling as an attachment wall part. In the following description, the vertical direction is described as the vertical direction in a state where it is installed on the ceiling. The lighting fixture 1 has the fixture main body 2, the light source part 3, and the attachment spring 4, as shown to FIG.

  As shown in FIGS. 7 and 8, the instrument body 2 has a substantially cylindrical side wall portion 5, and a top plate portion 6 is formed on the upper portion of the side wall portion 5. As shown in FIG. 4, a plurality of heat radiation fins 7, 7,... Are formed on the outer periphery of the side wall portion 5 and the top plate portion 6 in the vertical direction so as to be substantially radial in a plan view. As shown in FIG. 1, an opening 8 for emitting light from the light source is formed at the lower part of the side wall part 5, and a flange part 9 is formed at the outer peripheral edge of the opening 8 at the lower part of the side wall part 5. ing. The flange part 9 is a part which contacts a ceiling in the state which installed the lighting fixture 1 in the attachment hole of the ceiling. As shown in FIGS. 2 and 7, a hole 31 is formed in the top plate portion 6 to guide the electric wire 20 connected to the substrate 14 to the upper side of the base body 2. A lid 32 is provided to cover the electric wire 20 guided from the plate part 6 to the side wall part 5 side. On the top plate 6, a boss 34 into which a bolt 33 for fixing the lid 32 is inserted is erected.

  As shown in FIGS. 1 and 2, the attachment spring 4 is a fixing means for fixing the lighting fixture 1 to the ceiling, and is disposed so as to face the diameter direction of the flange portion 9. The mounting spring 4 is formed by bending a rod-shaped metal member made of a stainless material or the like, and an arm portion 10 formed in a U shape in plan view is formed in a central portion 11 formed in a spiral shape. And is formed in the shape of an abbreviated side view. A spiral central portion 11 of the attachment spring 4 is supported by a shaft portion 12 formed at the upper center of the instrument body 2. In addition, about the shape of the attachment spring 4, an attachment position, a number, etc., it is not limited to the thing of a present Example.

As shown in FIGS. 1, 2, 7, and 8, the light source unit 3 is provided inside the opening 8 of the instrument body 2 and includes a substrate 14, a panel holder 15, and a panel 16.
The substrate 14 is provided with LEDs 18, 18, 18 as light sources at three equal intervals on the same circumference so as to correspond to the light source holes 17, 17, 17 of the panel holder 15. A dowel hole 19 into which the dowel 25 of the panel holder 15 is fitted is formed. Further, in order to avoid interference with the bosses 29, 29 erected on the panel holder 15, U-shaped notches 30, 30 are formed at positions facing each other in the diameter direction. Further, the substrate 14 is electrically connected to a lighting device (not shown) by an electric wire 20.

  The panel holder 15 is a member that supports the panel 16 to the instrument body 2 while separating the panel 16 and the substrate 14 at a predetermined interval. The panel holder 15 is fixed to the instrument main body 2 by bolts 21 and 21 inserted into the bosses 35 and 35 disposed on the top plate portion of the instrument main body 2. The panel holder 15 has a central portion 22 formed in a flat shape, a peripheral edge portion 23 formed in a parabolic surface, and is formed in a substantially bowl shape. The inner peripheral surface reflects light emitted from the LED 18. It is a reflective surface. The central portion 22 formed in a flat shape is formed with light source holes 17, 17, 17 into which the respective LEDs 18, 18, 18 are put. 7. As shown in FIG. 8, a panel support 24 having an L-shape in cross section for holding the peripheral edge of the panel 16 is formed. In this embodiment, the whole panel holder 15 is formed in a bowl shape, but the shape of the panel holder 15 is not limited to this, and for example, a bowl shape corresponding to each LED 18, 18, 18 is formed. It may be.

On the upper part of the panel holder 15, bosses 29 and 29 into which bolts 21 and 21 to be fixed to the instrument body 2 are inserted are erected so as to face each other in the diameter direction.
A dowel 25 is formed in the center of the panel holder 15, and the substrate 14 and the panel holder 15 insert the LEDs 18, 18, 18 of the substrate 14 into the light source holes 17, 17, 17 of the panel holder 15. The dowel 25 of the panel holder 15 is inserted into the dowel hole 19 of the substrate 14 and is fixed by welding the dowel 25. Further, as shown in FIGS. 1, 2, and 7, the panel support 24 of the panel holder 15 is hooked with hooks 26, which are formed at equal intervals on the circumference of the panel 16. .. Are formed, and the panel holder 15 and the panel 16 are fixed by hooking the claw portions 26..

  The panel holder 15 is coated with aluminum vapor deposition or silver vapor deposition in order to enhance reflection. The panel holder 15 controls the light distribution so that the light directed from the LED 18 is reflected by the reflecting surface and is directed forward. Therefore, the light emitted from the LED 18 is efficiently collected by the panel holder 15.

  The panel 16 is a member that transmits light from the LED 18 to form an irradiation surface, and covers the entire opening 8 of the instrument body 2 as shown in FIGS. 3, 5, and 6. The panel 16 is formed in a circular plate shape with a resin material having translucency, and the Fresnel lens 13 is formed over the entire area of the panel 16. As shown in FIG. 10, the Fresnel lens 13 is formed by forming innumerable fine inclined surface groups 28 that refract and transmit the light emitted from the LED 18 in a concentric manner with the condensing center L1 as the center. As shown in FIG. 10, when the light collection center L1 of the Fresnel lens 13 is arranged on the light emission center L of the light emitting surface of the LED 18, the light emitted from the LED 18 and incident on the Fresnel lens 13 is reflected by the Fresnel lens. 13, and is emitted as parallel light that is orthogonal to the front of the Fresnel lens 13.

  In the luminaire 1 of the present invention, the light collection center L1 of the Fresnel lens 13 is arranged at a position shifted from the light emission center L2 of the light emitting surface of the LED 18, as shown in FIGS. . The Fresnel lens 13 is configured such that an inclined surface group 28 is formed concentrically on the panel 16 around the condensing center L1 of the respective LEDs 18, 18, and 18. As shown in FIGS. 5 and 6, the respective light collection centers L1, L1, and L1 are changed from one light emission center L2 to two light emission centers L2 and L2 with respect to the respective light emission centers L2, L2, and L2. They are arranged at the same interval in the direction of heading. Then, concentric inclined surface groups 28 are formed in fan-shaped regions in which the central angles are equally divided around the center of gravity of the triangle formed by the respective condensing centers L1, L1, and L1. The face group 28 is formed over the entire area on the panel 16.

  In addition, the direction and interval which shift the condensing center L1 with respect to the light emission center L2 are not limited to the said structure, For example, in the direction which goes to one light emission center L2 from two light emission centers L2 and L2. It is good also as a structure which shifts and arranges the condensing center L1. Further, in the present embodiment, the center of the division of the region where the inclined surface group 28 is formed is concentric from the light collection center L1 as the center of gravity of the triangle formed by the respective light collection centers L1, L1, and L1. Of the formed inclined surface group 28, the region of the inclined surface group 28 in the vicinity of each condensing center L1 is secured, but the region of the inclined surface group 28 is limited to the above-described configuration. Instead, the center of the panel 16 may be the center of division.

  When the light emitted from the LED 18 enters the Fresnel lens 13 with the light emission center L2 being shifted from the light collection center L1 of the Fresnel lens 13, the light is condensed and emitted in a direction not directly below. Specifically, as shown in FIG. 9, the light incident on the Fresnel lens 13 is condensed in a direction from the light emission center L2 toward the light collection center L1 and emitted as parallel light. Thus, the light emission direction can be adjusted simply by shifting the light collection center L1 of the Fresnel lens 13 from the light emission center L2 of the LED 18.

  In this way, the light emitted from the plurality of LEDs can be condensed in a direction other than the orthogonal direction by the single panel 16 covering the entire surface of the opening 8. Further, the panel holder 15 on which the reflection surface is formed can reflect light emitted in directions other than the front of the LED 18 and can be used effectively. And the lighting fixture 1 comprised in this way can change the direction of light simply by replacing | exchanging the panel 16 with the panel in which the lens arrange | positioned in the position where a condensing center differs is formed.

  The technical scope of the present invention described above is not limited to the above embodiment, and is not limited to the shape of the above embodiment. The technical scope of the present invention broadly covers the entire scope of technical ideas that the present invention truly intends, as will be apparent from the matters described in the present specification and drawings.

DESCRIPTION OF SYMBOLS 1 Lighting fixture 2 Appliance main body 8 Opening part 13 Fresnel lens 14 Board | substrate 15 Panel holder 16 Panel 18 LED
28 Inclined surface group L1 Focusing center L2 Luminescent center

Claims (2)

An instrument body in which an opening for emitting light is formed;
A substrate disposed in the opening and mounting a plurality of LEDs;
A panel covering the entire surface of the opening;
A lighting fixture comprising a panel holder for holding the panel and fixing it to the fixture body,
A luminaire in which a Fresnel lens is formed over the entire panel, with each light collection center being shifted from the light emission center of each LED.   The lighting apparatus according to claim 1, wherein the panel holder includes a reflecting surface formed on a parabolic surface.

Images