JP2019212546A - Led light device - Google Patents

Abstract

To provide an LED light device capable of suppressing uneven irradiation light.SOLUTION: There is provided an LED light device A1 comprising an LED light source unit 2; and a reflection member 8 having an entrance opening 81 through which light from the LED light source unit 2 enters, an exit opening 82 through which light incident from the entrance opening 81 is emitted, and a reflection surface 83. An entrance opening plane P1, which is a plane including the entrance opening 81, is inclined with respect to the exit opening plane P2, which is a plane including the exit opening 82. The reflection surface 83 includes a first line segment 84 and a second line segment 85 which are orthogonal to the entrance opening plane P1 and the exit opening plane P2 and intersecting lines with a reference plane P3 passing through the center of the entrance opening plane 81 and the center of the exit opening plane 82. The first line segment 84 is longer than the second line segment 85. The second angle α2, which is the angle formed by the second line segment 85 with the exit opening plane P2, is larger than the first angle α1 formed by the first line segment 84 with the exit opening plane P2.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an LED lighting apparatus.

  2. Description of the Related Art LED lighting fixtures that have an LED light source that includes LEDs and are called so-called downlights are widely used. Patent Document 1 discloses an example of a conventional LED lighting apparatus. The LED lighting fixture disclosed in the document includes a reflecting member having a reflecting surface that reflects light from the LED light source. The reflecting member has a substantially hemispherical shape and has an entrance opening and an exit opening. The exit opening is set substantially parallel to, for example, the ceiling surface to which the LED lighting apparatus is attached. The entrance opening is formed to be inclined with respect to the exit opening. The light from the LED light source enters the incident aperture from a direction inclined with respect to the vertical direction, and at least a part of the light is reflected by the reflecting surface and is emitted from the output aperture.

JP 2014-78375 A

  The light emitted from the emission opening is irradiated onto the floor surface, for example. This irradiation light preferably illuminates the floor surface more uniformly. However, there is a problem that unevenness occurs in the irradiated light due to the configuration of the reflecting member.

  The present invention has been conceived under the circumstances described above, and an object thereof is to provide an LED lighting apparatus capable of suppressing unevenness of irradiation light.

  The LED lighting apparatus provided by the present invention includes an LED light source unit having an LED, an incident opening through which light from the LED light source unit is incident, an exit opening through which light is incident from the incident aperture, and the incident aperture. And a reflecting member having a reflecting surface that reflects the light, and an incident opening plane that is a plane that includes the incident opening is an output that includes the exit opening. The reflecting surface is inclined with respect to the aperture plane, and the reflective surface is perpendicular to the entrance aperture plane and the exit aperture plane, and a reference plane passing through the center of the entrance aperture plane and the center of the exit aperture plane. A first line segment and a second line segment that are intersecting lines, wherein the first line segment is longer than the second line segment and is an angle formed by the second line segment and the exit aperture plane; Angle is before Greater than the first angle is the angle at which the first line segment forms with the exit aperture plane, it is characterized in that.

  In a preferred embodiment of the present invention, the glare is a straight line connecting a first incident side end that is an incident side end of the first line segment and a second output side end that is an output side end of the second line segment. The glare cut angle, which is the angle formed by the cut straight line and the exit aperture plane, is 40 ° or more.

  In a preferred embodiment of the present invention, the first angle is larger than the glare cut angle.

  In a preferred embodiment of the present invention, the first line segment and the second line segment are straight lines.

  In a preferred embodiment of the present invention, a support member that supports the LED light source unit is provided, and the support member is rotatable around an axis that is perpendicular to the reference plane with respect to the reflection member.

  In a preferred embodiment of the present invention, the surface hardness of the reflecting surface is 4H or more.

  According to the present invention, unevenness of irradiation light can be suppressed.

  Other features and advantages of the present invention will become more apparent from the detailed description given below with reference to the accompanying drawings.

It is a perspective view which shows the LED lighting fixture which concerns on 1st Embodiment of this invention. It is a disassembled perspective view which shows the LED lighting fixture which concerns on 1st Embodiment of this invention. It is a side view which shows the LED lighting fixture which concerns on 1st Embodiment of this invention. It is a top view which shows the LED lighting fixture which concerns on 1st Embodiment of this invention. It is a bottom view which shows the LED lighting fixture which concerns on 1st Embodiment of this invention. It is a front view which shows the LED lighting fixture which concerns on 1st Embodiment of this invention. It is a rear view which shows the LED lighting fixture which concerns on 1st Embodiment of this invention. It is sectional drawing which follows the VIII-VIII line of FIG. It is sectional drawing which follows the IX-IX line of FIG. It is sectional drawing which follows the XX line of FIG. It is sectional drawing which follows the XI-XI line of FIG. (A) which shows the reflection member of the LED lighting fixture which concerns on 1st Embodiment of this invention is a top view, (b) is a rear view, (c) is a bottom view, (d) is a front view. (E) is a side view. It is sectional drawing which follows the XIII-XIII line | wire of FIG.12 (b). It is a figure which shows an example of the irradiation light by the LED lighting fixture which concerns on 1st Embodiment of this invention. It is a figure which shows the irradiation light by the LED lighting fixture of a comparative example.

  Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

  Terms such as “first”, “second”, and “third” in the present disclosure are merely used as labels, and are not necessarily intended to permutate those objects.

<First Embodiment>
1-13 has shown the LED lighting fixture which concerns on 1st Embodiment of this invention. The LED lighting apparatus A1 of this embodiment includes a support member 1, an LED light source unit 2, a lens member 3, a light distribution member 39, a lens holding member 4, an attachment member 5, an incident side ring member 6, an output side ring member 7, and a reflection. A member 8, a plurality of spring members 91, a cable 93 and a cable holder 94 are provided.

  FIG. 1 is a perspective view showing an LED lighting apparatus A1. FIG. 2 is an exploded perspective view showing the LED lighting apparatus A1. FIG. 3 is a side view showing the LED lighting apparatus A1. FIG. 4 is a plan view showing the LED lighting apparatus A1. FIG. 5 is a bottom view showing the LED lighting apparatus A1. FIG. 6 is a front view showing the LED lighting apparatus A1. FIG. 7 is a rear view showing the LED lighting apparatus A1. 8 is a cross-sectional view taken along line VIII-VIII in FIG. FIG. 9 is a cross-sectional view taken along line IX-IX in FIG. 10 is a cross-sectional view taken along line XX in FIG. 11 is a cross-sectional view taken along line XI-XI in FIG. 12A is a plan view, FIG. 12B is a rear view, FIG. 12C is a bottom view, and FIG. 12D is a front view, showing the reflecting member 8 of the LED lighting apparatus A1. (E) is a side view. FIG. 13 is a cross-sectional view taken along line XIII-XIII in FIG. In these drawings, the x direction and the y direction are directions parallel to a ceiling surface that is an example of an installation object of the LED lighting device A1. The z direction corresponds to a so-called vertical direction or a direction called a vertical direction.

<Supporting member 1>
The support member 1 is for supporting the LED light source unit 2. As shown in FIGS. 1 and 2, the support member 1 of this embodiment includes a support member main body 11, a plurality of heat radiation ribs 12, and a support surface 13.

  The material of the support member 1 is not particularly limited. From the viewpoint of more efficiently dissipating heat from the LED light source unit 2, the support member 1 is preferably made of a material having excellent thermal conductivity. Examples of the material of the support member 1 include metals such as aluminum. In the following description, a case where the support member 1 is made of aluminum will be described as an example. The support member 1 made of aluminum may be formed by, for example, extrusion molding in the z direction.

  As shown in FIGS. 8 to 10, the support member main body 11 is a part serving as a base of the support member 1. In the illustrated example, the support member main body 11 is a columnar portion extending in the z direction, and has a cylindrical shape, for example. In addition, the support member main body 11 may be, for example, a polygonal columnar shape or a shape other than the columnar shape.

  As shown in FIGS. 2, 4, and 8, the plurality of heat radiating ribs 12 are portions that extend substantially radially from the support member main body 11. The plurality of heat radiating ribs 12 are portions for radiating heat transferred from the LED light source unit 2 to the support member main body 11 to the outside more efficiently. In the illustrated example, the heat radiating rib 12 has a shape having a trunk extending from the support member main body 11 and a plurality of branches extending from the trunk, but the shape of the heat radiating rib 12 is not particularly limited. In the illustrated example, the heat radiating rib 12 has a substantially constant cross-sectional shape perpendicular to the z direction, but may have a non-constant shape.

  The support surface 13 is a surface that supports the LED light source unit 2. As shown in FIGS. 2, 8, and 9, in the present embodiment, the support surface 13 is one end surface of the support member main body 11 in the z direction. In the illustrated example, the support surface 13 is a plane that is perpendicular to the z direction.

<LED light source unit 2>
The LED light source unit 2 is a light source of the LED lighting apparatus A1, and is supported by the support surface 13 of the support member 1 as shown in FIGS. The configuration of the LED light source unit 2 is not particularly limited. In the present embodiment, the LED light source unit 2 includes an LED substrate 21 and an LED 22.

  The LED substrate 21 is a member on which the LEDs 22 are mounted, and is fixed to the support surface 13 of the support member 1. The configuration of the LED substrate 21 is not particularly limited, and includes, for example, a base material made of ceramics or glass epoxy resin and a wiring pattern formed on the base material. A method for fixing the LED substrate 21 to the support surface 13 of the support member 1 is not particularly limited, and for example, fastening using screws, adhesion using an adhesive, or the like is appropriately employed.

  The LED 22 performs a light emitting function, and is, for example, a chip in which semiconductor layers are stacked. The number of the LEDs 22 is not particularly limited, and the LED light source unit 2 preferably includes a plurality of LEDs 22 from the viewpoint of improving the light amount.

  The kind of LED22 etc. are not specifically limited. As an example of the LED 22, the LED 22 emits blue light when it is made of a GaN-based semiconductor layer. In this case, the LED light source unit 2 may have a sealing resin that covers the LEDs 22. This sealing resin contains a fluorescent material in, for example, a transparent epoxy resin or silicone resin. This shape material emits, for example, yellow light when excited by the blue light from the LED 22. By mixing the blue light from the LED 22 and the yellow light from the fluorescent material, the LED light source unit 2 emits light of a color typified by daylight white, daylight color, and light bulb color.

<Lens member 3>
As shown in FIGS. 2, 8 and 9, the lens member 3 is disposed immediately below the LED light source unit 2 in the z direction. The lens member 3 is for adjusting the directivity of light by refracting the light from the LED light source unit 2 according to the purpose of use of the LED lighting apparatus A1. The material of the lens member 3 is not specifically limited, For example, it consists of a transparent acrylic resin, an epoxy resin, glass, etc.

  As shown in FIGS. 8 and 9, the lens member 3 of the present embodiment has an incident surface 31, an output surface 32, a concave portion 33, a reflective inner surface 34, and a flange portion 35. In the illustrated example, the lens member 3 functions to increase the directivity of light from the LED light source unit 2.

  The incident surface 31 is a surface on which light from the LED light source unit 2 is incident. In the illustrated example, the incident surface 31 directly faces the LED light source unit 2 immediately below the LED light source unit 2 in the z direction. The shape of the incident surface 31 is not particularly limited, and in the illustrated example, it is a convex curved surface that bulges to the LED light source unit 2 side (upper side) in the z direction. Further, the incident surface 31 has a substantially circular shape when viewed in the z direction.

  The exit surface 32 is a surface from which light incident from the entrance surface 31 exits. The exit surface 32 is located on the side opposite to the entrance surface 31 in the z direction. The shape of the emission surface 32 is not particularly limited, and in the illustrated example, it is substantially circular when viewed in the z direction. As shown in FIG. 5, in the illustrated example, the emission surface 32 has a portion composed of a plurality of uneven surfaces at the center. However, such an emission surface 32 is one configuration example, and the specific configuration is not limited at all.

  As shown in FIGS. 8 and 9, the recess 33 is a portion that is recessed from the upper side in the z direction to the lower side in the z direction. In the present embodiment, the bottom surface of the recess 33 is the incident surface 31. The recess 33 is, for example, circular when viewed in the z direction. In the illustrated example, the size of the recessed portion 33 in the z-direction view is larger than the size of the LED light source portion 2 in the z-direction view, and the recessed portion 33 includes the LED light source portion 2 in the z-direction view.

  The reflective inner surface 34 is a surface that reflects a part of the light incident from the incident surface 31 and traveling through the lens member 3. The shape of the reflective inner surface 34 is not particularly limited, and in the present embodiment, the shape is a parabolic shape in which the cross-sectional shape perpendicular to the z direction increases from the upper side to the lower side in the z direction.

  The flange portion 35 is a portion extending outward from the lower end of the reflective inner surface 34 in the z direction so as to be substantially along the xy plane. The shape of the flange portion 35 is not particularly limited, and in the illustrated example, it is an annular shape when viewed in the z direction.

<Light distribution member 39>
As shown in FIGS. 2, 5, and 8 to 10, the light distribution member 39 is disposed immediately below the z direction of the emission surface 32 of the lens member 3. The light distribution member 39 is for increasing the proportion of light emitted from the emission surface 32 of the lens member 3 in a desired direction. The configuration of the light distribution member 39 is not particularly limited. As an example of a specific configuration of the light distribution member 39, one formed by bending a metal plate or the like can be cited. Further, the LED lighting apparatus A1 may be configured not to include the light distribution member 39.

  As shown in FIGS. 5 and 8 to 10, in the illustrated example, the light distribution member 39 has a plurality of light distribution holes 391. Each of the plurality of light distribution holes 391 is open on the upper side and the lower side in the z direction. Such a light distribution hole 391 functions to allow light traveling along the z direction to pass therethrough and to block or reflect light traveling in a direction greatly inclined with respect to the z direction. As shown in FIG. 5, in the illustrated example, the light distribution member 39 has a so-called honeycomb structure, and the light distribution holes 391 have a hexagonal shape when viewed in the z direction, but are not limited thereto. is not.

<Lens holding member 4>
As shown in FIGS. 1, 2, 3, and 8 to 10, the lens holding member 4 is fixed to the support member 1 and is a member for holding the lens holding member 4. The material of the lens holding member 4 is not particularly limited, and a metal, a resin, or the like is appropriately employed, and aluminum as a specific example thereof can be given.

  As shown in FIGS. 3 and 6 to 10, the lens holding member 4 of the present embodiment includes a cylindrical portion 41, a flange portion 42, a plurality of ribs 43, a plurality of protrusions 44, and an engagement recess 45. .

  The cylindrical portion 41 is a cylindrical portion whose axial direction is the z direction, and in the illustrated example, has a cylindrical shape. The cylindrical portion 41 accommodates the lens member 3.

  The flange portion 42 is a portion that extends outward and inward from the upper end in the z direction of the tubular portion 41 so as to substantially follow the xy plane. The shape of the flange portion 42 is not particularly limited, and in the illustrated example, it is an annular shape when viewed in the z direction. The flange portion 42 is attached to the support member 1.

  The plurality of ribs 43 are connected to the cylindrical portion 41 and the flange portion 42, and each has a flat plate shape along the z direction. The plurality of ribs 43 are arranged radially when viewed in the z direction. The rib 43 functions to radiate heat transmitted from the support member 1 to the flange portion 42 to the outside, for example.

  The plurality of ridge portions 44 are provided on the outer surface of the tubular portion 41, and each has a shape along the z direction. The plurality of protrusions 44 are used for attaching the attachment member 5. In the illustrated example, the number of the plurality of protrusions 44 is three.

  The engaging recess 45 is provided at the lower end portion of the cylindrical portion 41 in the z direction. The engaging recess 45 is recessed from the lower end surface of the tubular portion 41 to the upper side in the z direction, and is recessed outward from the inner peripheral surface of the tubular portion 41. The flange portion 35 of the lens member 3 is engaged with the engagement recess 45. Thereby, the lens member 3 is positioned with respect to the lens holding member 4, and the lens member 3 can be held more reliably.

<Mounting member 5>
As shown in FIG. 1 to FIG. 3, the attachment member 5 includes the support member 1, the LED light source unit 2, the lens member 3, and the lens holding member 4 as an incident side ring member 6, an output side ring member 7, and a reflection member 8. On the other hand, it is a member for mounting rotatably. In the present embodiment, the attachment member 5 is fixed to the lens holding member 4 and the incident side ring member 6, but this is an example of the attachment structure of the attachment member 5, and the present invention is not limited to this. The material of the attachment member 5 is not particularly limited, and in the illustrated example, it is formed, for example, by bending or cutting a metal plate.

  As shown in FIGS. 2, 3, 6, 7, and 10, the attachment member 5 of the present embodiment includes an annular portion 51, a plurality of first extending portions 52, a plurality of side portions 53, and a plurality of first portions. 2 has an extension 54.

  The annular portion 51 is disposed immediately below the lens holding member 4 and the light distribution member 39 in the z direction. The shape of the annular portion 51 is not particularly limited. In the illustrated example, the annular portion 51 is an annular portion as viewed in the z direction, and is a portion that supports the light distribution member 39 and the lens member 3 from below in the z direction.

  The plurality of first extending portions 52 are portions that extend outward from the annular portion 51. In the illustrated example, the two first extending portions 52 extend from the annular portion 51 on both sides in the y direction and protrude from the lens holding member 4. The shape of the 1st extension part 52 is not specifically limited, In the example illustrated, it is strip | belt shape.

  The plurality of side portions 53 are portions that extend downward from the tips of the plurality of first extending portions 52 in the z direction. In the illustrated example, two side portions 53 extend from the two first extending portions 52. The shape of the side part 53 is not specifically limited, In the example shown, it is strip | belt shape.

  The plurality of second extending portions 54 are portions that extend outward from the annular portion 51. The number of second extending portions 54 is not particularly limited, and in the illustrated example, it is three corresponding to the number of ridge portions 44. As shown in FIG. 8, the second extending portion 54 is fixed to the protrusion 44 of the lens holding member 4 with a screw 56. Thereby, the attachment member 5 is fixed to the lens holding member 4.

<Incoming side ring member 6>
The incident side ring member 6 is a member to which the attachment member 5 is attached. As shown in FIGS. 1 to 3, the incident side ring member 6 is disposed immediately below the lens holding member 4 and the mounting member 5 in the z direction. The material of the incident side ring member 6 is not specifically limited, A metal, resin, etc. are employ | adopted suitably, Aluminum is mentioned as one specific example.

  As shown in FIGS. 3 and 6 to 10, the incident side ring member 6 of the present embodiment includes a cylindrical portion 61, an engagement rib 62, a plurality of attachment holes 64, a plurality of engagement claw portions 65, and a plurality of engagement portions 65. A positioning rib 66 is provided.

  As shown in FIGS. 8 to 10, the cylindrical portion 61 is a cylindrical portion whose axial direction is the z direction, and in the illustrated example, has a substantially cylindrical shape. The cylindrical part 61 accommodates at least a part of the reflecting member 8. In the illustrated example, the cylindrical portion 61 has a tapered portion 611. The tapered portion 611 is a part of the upper end portion in the z direction of the cylindrical portion 61 and is a portion inclined with respect to the x direction.

  The engagement rib 62 is a portion that protrudes from the outer peripheral surface of the cylindrical portion 61 as shown in FIGS. 2, 8, and 9. The engagement rib 62 is formed along the circumferential direction in the vicinity of the center in the z direction of the outer peripheral surface of the cylindrical portion 61.

  The plurality of attachment holes 64 are through holes provided in the cylindrical portion 61 as shown in FIGS. 2 and 10. As shown in FIG. 10, in the illustrated example, two mounting holes 64 are provided. The attachment hole 64 penetrates the cylindrical part 61 in the y direction. Two side portions 53 of the attachment member 5 are attached to the two attachment holes 64 by two screws 55. In the present embodiment, the two side portions 53 of the attachment member 5 are attached to the cylindrical portion 61 of the incident side ring member 6 so as to be rotatable around an axis extending in the y direction passing through the screw 55.

  As shown in FIGS. 2 and 8, the plurality of engaging claws 65 are provided at the lower end in the z direction of the tubular portion 61 and project outward. The plurality of engagement claws 65 are for fixing the incident side ring member 6 and the emission side ring member 7 to each other by engagement. The number of the plurality of engaging claws 65 is not particularly limited, and is three in the illustrated example.

  The plurality of positioning ribs 66 are for positioning the circumferential position (angle) of the reflecting member 8 with respect to the incident side ring member 6. As shown in FIGS. 2 and 11, the plurality of positioning ribs 66 protrude inward from the inner peripheral surface of the cylindrical portion 61. In the illustrated example, two positioning ribs 66 are provided. As shown in FIG. 11, the two positioning ribs 66 have portions provided side by side with a gap in the y direction.

  Moreover, as shown in FIG. 10, the two engagement members 69 are provided in the incident side ring member 6 of this embodiment. The two engaging members 69 are composed of members separate from the cylindrical portion 61 and the like, and are formed by, for example, bending a spring plate or the like. The two engaging members 69 are provided on the inner side of the cylindrical portion 61 and are disposed apart from each other in the y direction. The two engaging members 69 are for detachably attaching the reflecting member 8 to the incident side ring member 6.

<Exit-side ring member 7>
The emission side ring member 7 is a member to which the incident side ring member 6 and the reflection member 8 are attached. As shown in FIGS. 1 to 3, the exit side ring member 7 is arranged at a position shifted downward in the z direction with respect to the entrance side ring member 6 so that a part of the exit side ring member 6 overlaps the entrance side ring member 6. Yes. The material of the emission side ring member 7 is not particularly limited, and a metal, a resin, or the like is appropriately employed, and aluminum is given as a specific example thereof.

  As shown in FIGS. 2, 3, and 8, the emission side ring member 7 of the present embodiment includes a cylindrical portion 71, a flange portion 72, an engagement recess 73, an engagement recess 74, and an engagement recess 75.

  The cylindrical part 71 is a cylindrical part having the z direction as an axial direction, and has a substantially cylindrical shape in the illustrated example. The cylindrical portion 61 accommodates at least a part of each of the emission side ring member 7 and the reflection member 8.

  The flange portion 72 is a portion that extends outward from the lower end in the z direction of the cylindrical portion 71 so as to substantially follow the xy plane. The shape of the flange portion 72 is not particularly limited, and in the illustrated example, it is an annular shape when viewed in the z direction. In this embodiment, when LED lighting fixture A1 is installed in a ceiling surface, the z direction upper surface of the flange part 72 contact | abuts on a ceiling surface, and the flange part 72 is visually recognized from the downward direction.

  The engaging recess 73 is provided in the upper end portion of the cylindrical portion 71 in the z direction. The engaging recess 73 is recessed downward from the upper end surface of the cylindrical portion 71 in the z direction, and is recessed outward from the inner peripheral surface of the tubular portion 71. The engaging rib 62 of the incident side ring member 6 is engaged with the cylindrical portion 71. Thereby, the incident side ring member 6 is positioned with respect to the emission side ring member 7.

  The engaging recess 74 is provided at the lower end portion of the cylindrical portion 71 in the z direction. The engaging recess 74 is recessed from the lower end surface of the tubular portion 71 upward in the z direction, and is recessed outward from the inner peripheral surface of the tubular portion 71. A flange portion 86 of the reflecting member 8 described later engages with the engaging recess 74. Thereby, positioning with respect to the output side ring member 7 of the reflecting member 8 is made.

  As shown in FIG. 8, the engaging recess 75 is a portion that is recessed from the inner peripheral surface of the cylindrical portion 71. The engagement concave portion 75 is for detachably fixing the incident side ring member 6 and the emission side ring member 7 by engaging with the engagement claw portion 65. In the present embodiment, three engagement concave portions 75 are provided corresponding to the number of the plurality of engagement claw portions 65.

<Reflection member 8>
The reflection member 8 reflects the light emitted by the LED light source unit 2 and adjusts the region to be irradiated. As shown in FIGS. 1, 2, and 8, the reflecting member 8 of the present embodiment is disposed on the lower side in the z direction with respect to the LED light source unit 2 and the lens member 3, and the incident-side ring member 6 and the emitting member are emitted. It is accommodated by the side ring member 7. The material of the reflecting member 8 is not particularly limited, and a metal, a resin, or the like is appropriately employed, and aluminum as one specific example thereof can be given.

  As shown in FIGS. 8 and 10 to 13, the reflecting member 8 of the present embodiment includes a cylindrical portion 80, an incident opening 81, an emitting opening 82, a reflecting surface 83, a flange portion 86, a positioning rib 87, and a plurality of engagements. It has a mating protrusion 88.

  The cylindrical portion 80 is a main body portion of the reflecting member 8. The cylindrical portion 80 is a substantially cone-shaped portion whose cross-sectional shape that is perpendicular to the z direction increases from the upper side to the lower side in the z direction. As shown in FIG. 8, the center line O of the cylindrical portion 80 is inclined with respect to the z direction.

  The incident opening 81 is an opening through which light emitted from the LED light source unit 2 enters. In the illustrated example, the incident opening 81 is an opening portion at the upper end in the z direction of the cylindrical portion 80. The center line O passes through the center of the incident aperture 81. As shown in FIGS. 8 and 13, a plane including the incident aperture 81 is defined as an incident aperture plane P1. The incident aperture plane P1 is inclined with respect to the x direction and is parallel to the y direction.

  The exit aperture 82 is an aperture through which light incident from the entrance aperture 81 exits. In the illustrated example, the incident opening 81 is an opening portion at the lower end in the z direction of the cylindrical portion 80. The center line O passes through the center of the exit opening 82. As shown in FIGS. 8 and 13, a plane including the emission opening 82 is defined as an emission opening plane P2. In the present embodiment, the exit aperture plane P2 is parallel to the x direction and the y direction.

  The reflecting surface 83 is a surface that reflects light incident from the incident opening 81 and is an inner peripheral surface of the cylindrical portion 80. As long as the reflecting surface 83 is a surface that reflects light to an expected level, the surface properties and the like are not particularly limited. In the present embodiment, the surface hardness of the reflecting surface 83 is 4H or more. As a specific example of such a reflective surface 83, for example, coating is performed. An example of such a coating is a high hardness glass coating, for example. The film of the high-hardness glass coating is an inorganic tetrafunctional silicon resin whose main component is, for example, inorganic. When such a high hardness glass coating is used, the hardness of the glass film is, for example, about 8H to 9H. When a high-hardness glass coating is used, the abrasion resistance, acid resistance, heat resistance, solvent resistance, weather resistance, contamination resistance, and water repellency of the reflective surface 83 can be improved. Further, the ultraviolet light received by the reflecting surface 83 can be reduced by the high-hardness glass coating.

  As shown in FIGS. 8, 12, and 13, a plane that is perpendicular to the entrance aperture plane P <b> 1 and the exit aperture plane P <b> 2 and includes the center line O passing through the center of the entrance aperture 81 and the center of the exit aperture 82 is defined as a reference plane. It is defined as P3. In the present embodiment, the reference plane P3 is a yz plane. The reflective surface 83 has a first line segment 84 and a second line segment 85 that are a battle with the reference plane P3.

  The first line segment 84 and the second line segment 85 are located on opposite sides in the x direction. The first line segment 84 is longer than the reflecting surface 83. In the present embodiment, the first line segment 84 and the second line segment 85 are both straight lines, but the specific shape is not particularly limited, and may be, for example, a curve.

  As shown in FIGS. 8 and 13, the first line segment 84 has a first incident side end 841 and a first emission side end 842. The first incident side end 841 is an incident side end of the first line segment 84 in the z direction. The first emission side end 842 is the emission side end of the first line segment 84 in the z direction.

  As shown in FIGS. 8 and 13, the second line segment 85 has a second incident side end 851 and a second emission side end 852. The second incident side end 851 is an incident side end of the second line segment 85 in the z direction. The second emission side end 852 is the emission side end of the second line segment 85 in the z direction. The second incident side end 851 is located above the first incident side end 841 in the z direction. The second emission side end 852 is substantially at the same position as the first emission side end 842 in the z direction.

  Here, the angle formed by the first line segment 84 and the exit aperture plane P2 is defined as a first angle α1. The angle formed by the second line segment 85 and the exit aperture plane P2 is defined as a second angle α2. The second angle α2 is larger than the first angle α1. Taking an example of the magnitudes of the first angle α1 and the second angle α2, the first angle α1 is about 50 °, and the second angle α2 is about 75 °.

  As shown in FIGS. 8 and 13, a straight line connecting the first incident side end 841 and the second emission side end 852 is defined as a glare cut straight line L1. An angle formed by the glare cut straight line L1 and the exit aperture plane P2 is defined as a glare cut angle α3. In the present embodiment, the glare cut angle α3 is 40 ° or more. Preferably, the first angle α1 is larger than the glare cut angle α3.

  As shown in FIGS. 8, 12, and 13, the flange portion 86 extends outward from the lower end in the z direction (exit opening 82) of the cylindrical portion 80 along the xy plane (exit opening plane P <b> 2). It is a part. The shape of the flange portion 86 is not particularly limited, and in the illustrated example, it is an annular shape when viewed in the z direction. As shown in FIG. 8, the flange portion 86 engages with the engagement concave portion 74 of the emission side ring member 7. Thereby, positioning with respect to the output side ring member 7 of the reflecting member 8 in the z direction is performed.

  The positioning rib 87 protrudes from the outer peripheral surface of the cylindrical portion 80 as shown in FIGS. 8 and 11 to 13. The positioning rib 87 is a plate-like portion along the zx plane. As shown in FIG. 11, the positioning rib 87 is sandwiched between the two positioning ribs 66 of the incident side ring member 6 from the y-direction side. Thereby, the circumferential direction position with respect to the incident side ring member 6 of the reflection member 8 is prescribed | regulated.

  The plurality of engaging protrusions 88 protrude from the outer peripheral surface of the cylindrical portion 80 as shown in FIGS. 10 and 12. In the illustrated example, two engagement protrusions 88 are provided apart on both sides in the y direction. As shown in FIG. 10, the engagement protrusion 88 engages with the engagement member 69. Thereby, the reflecting member 8 is detachably attached to the incident side ring member 6.

<Plural spring members 91>

  The plurality of spring members 91 are attached to the emission-side ring member 7 as shown in FIGS. The plurality of spring members 91 are for holding the LED lighting device A1 with respect to a hole for attaching the LED lighting device A1 to a downlight provided on the ceiling surface. The material of the spring member 91 is not particularly limited as long as it generates an elastic force capable of holding the LED lighting apparatus A1, and is formed using, for example, a spring plate. In the illustrated example, three spring members 91 are arranged at an equal pitch.

<Cable 93>
The cable 93 is for energizing the power for emitting light from the LED light source unit 2. As shown in FIGS. 1 to 3, in this embodiment, the cable 93 extends outward (x direction) from the upper end of the support member 1 in the z direction. The cable 93 is connected to a power source (not shown), for example.

<Cable holder 94>
The cable holder 94 is for fixing a part of the cable 93 to the support member 1. The material of the cable holder 94 is not particularly limited, and is made of a metal or an insulating material. An example of the insulating material is a resin.

  Next, the effect | action of LED lighting fixture A1 is demonstrated.

  FIG. 14 is a diagram illustrating an example of light emitted from the LED lighting fixture A1. FIG. 15 is a diagram illustrating light irradiated by the LED lighting fixture of the comparative example. The LED lighting fixture of the comparative example is different from the LED lighting fixture A1 in the configuration of the reflecting member 8 shown in FIGS. Specifically, in the LED lighting apparatus A1, the second angle α2 is larger than the first angle α1, but in the comparative example, the second angle α2 and the first angle α1 are substantially the same. This corresponds to an example in which the reflecting member has a substantially hemispherical shape as in a conventional LED lighting fixture, for example. Further, in the LED lighting apparatus A1, the glare cut angle α3 is 40 ° or more, whereas in the comparative example, the glare cut angle is less than 40 °.

  The irradiation light shown in FIG. 14 is clearly less uneven than the irradiation light shown in FIG. As this factor, first, in the LED lighting apparatus A1, the second angle α2 is larger than the first angle α1. With such a configuration, the size of the incident aperture 81 can be increased in the x direction, and more light from the LED light source unit 2 (lens member 3) can be incident on the incident aperture 81. Further, as in the comparative example, when the second angle α2 and the first angle α1 are substantially the same, the amount of light reaching the relatively short portion (the portion corresponding to the second line segment 85) is limited. It is difficult to achieve a sufficient reflection function. In the LED lighting device A1, since the second angle α2 is larger than the first angle α1, it is possible to increase the amount of light reaching the second line segment 85 and perform a sufficient reflection function. Thereby, it is thought that the nonuniformity is suppressed in the irradiation light of LED lighting fixture A1.

  Further, according to the inventor's research, it has been found that the magnitude of the glare cut angle α3 is one of the factors that influence the increase / decrease in unevenness of the irradiated light. As a result, when the glare cut angle α3 was 40 ° or more, an effect of suppressing unevenness of irradiation light was confirmed.

  As mentioned above, according to LED lighting fixture A1, the nonuniformity of irradiated light can be suppressed.

  A configuration in which the first angle α1 is larger than the glare cut angle α3 is preferable for suppressing unevenness of irradiation light.

  The fact that the first line segment 84 and the second line segment 85 are straight lines means that the reflection surface 83 is a so-called cone-shaped curved surface. According to such a reflective surface 83, it can be expected that the unevenness of the irradiated light is further suppressed.

  Since the support member 1 is rotatably attached to the reflecting member 8 via the attachment member 5, the angle and posture of the LED light source unit 2 (lens member 3) with respect to the incident opening 81 can be arbitrarily changed. Is possible. Thereby, the area | region and irradiation state which irradiation light goes to can be adjusted suitably.

  By setting the surface hardness of the reflecting surface 83 to 4H or more, it is possible to suppress the occurrence of scratches or the like on the reflecting surface 83 due to use. Thereby, it can suppress that the reflectance of the reflective surface 83 falls, and can suppress the light quantity fall of a irradiated light, and the increase in nonuniformity.

  The LED lighting apparatus according to the present invention is not limited to the embodiment described above. The specific configuration of each part of the LED lighting apparatus according to the present invention can be varied in design in various ways.

A1: LED lighting fixture 1: Support member 2: LED light source 3: Lens member 4: Lens holding member 5: Mounting member 6: Incident side ring member 7: Output side ring member 8: Reflective member 11: Support member main body 12: Radiation rib 13: support surface 21: LED substrate 22: LED
31: Incident surface 32: Output surface 33: Recess 34: Reflecting inner surface 35: Flange portion 39: Light distribution member 41: Tubular portion 42: Flange portion 43: Rib 44: Projection portion 45: Engaging recess 51: Annular portion 52: 1st extension part 53: Side part 54: 2nd extension part 55, 56: Screw 61: Cylindrical part 62: Engagement rib 64: Mounting hole 65: Engagement claw part 66: Positioning rib 69: Engagement Joint member 71: tubular portion 72: flange portions 73, 74, 75: engaging recess 80: tubular portion 81: incident opening 82: exit opening 83: reflecting surface 84: first line segment 85: second line segment 86 : Flange portion 87: positioning rib 88: engagement protrusion 91: spring member 93: cable 94: cable holder 391: light distribution hole 611: taper portion 841: first incident side end 842: first emission side end 851: first 2 entrance side end 852: second exit side end L : Glare shielding linear O: center line P1: entrance aperture plane P2: exit aperture plane P3: the reference plane [alpha] 1: first angle [alpha] 2: second angle .alpha.3: glare shielding angle

Claims (6)

An LED light source unit having an LED;
An incident aperture through which light from the LED light source is incident, an exit aperture that emits light incident from the incident aperture, and a reflective member that connects the incident aperture and the exit aperture and has a reflective surface that reflects the light; An LED lighting apparatus comprising:
An incident aperture plane that is a plane including the incident aperture is inclined with respect to an output aperture plane that is a plane including the output aperture,
The reflecting surface is perpendicular to the incident aperture plane and the exit aperture plane, and is a first line segment that is a line of intersection with a reference plane passing through the center of the entrance aperture plane and the center of the exit aperture plane; Has a second line segment,
The first line segment is longer than the second line segment,
A second angle that is an angle formed by the second line segment and the exit aperture plane is greater than a first angle that is an angle formed by the first line segment and the exit aperture plane.
An LED lighting apparatus characterized by the above.   A glare-cut straight line that is a straight line connecting a first incident side end that is the incident side end of the first line segment and a second emission side end that is the emission side end of the second line segment, and the emission aperture plane are formed. The LED lighting apparatus according to claim 1, wherein a glare cut angle that is an angle is 40 ° or more.   The LED lighting apparatus according to claim 2, wherein the first angle is larger than the glare cut angle.   The LED lighting apparatus according to claim 1, wherein the first line segment and the second line segment are straight lines. A support member for supporting the LED light source unit;
5. The LED lighting apparatus according to claim 1, wherein the support member is rotatable around an axis that is perpendicular to the reference plane with respect to the reflecting member.   The LED lighting apparatus according to claim 1, wherein the reflecting surface has a surface hardness of 4H or more.