Lighting fixtures

Abstract

To provide a lighting fixture capable of enlarging an irradiation range of illumination light.SOLUTION: A lighting fixture A1 includes a plurality of LEDs 100, a plurality of lenses 110, a reflection member 3 and a fixture body 2. The plurality of LEDs 100 are annularly disposed. The plurality of lenses 110 separately converge illumination light radiated from each of the plurality of LEDs 100. The reflection member 3 reflects the illumination light converged by the plurality of lenses 110 on reflection surfaces (a first reflection surface 310, a second reflection surface 320 and a third reflection surface 330). The fixture body 2 houses the plurality of LEDs 100, the plurality of lenses 110, and the reflection member 3. The fixture body 2 includes an emission window 20 for emitting the illumination light reflected on the reflection surface. The reflection surface inclines in a direction approaching the emission window 20 as separating from the plurality of lenses 110.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present disclosure relates to a lighting fixture, and more particularly to a lighting fixture that controls light distribution using reflection.

Background Art

[0002] As a conventional example, a lighting fixture described in Patent Document 1 is exemplified. The lighting fixture described in Patent Document 1 (hereinafter referred to as the conventional example) includes a main body provided with an opening, an LED provided inside the main body that irradiates light from the opening, and a color resin louver. The color resin louver allows the light irradiated downward from the LED to pass through as it is and irradiates it from the opening, and changes and irradiates the color of the light irradiated in the horizontal direction and the upward direction.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in a lighting fixture as in the above conventional example, it is desired to irradiate illumination light over a wider range.

[0005] An object of the present disclosure is to provide a lighting fixture capable of expanding the irradiation range of illumination light.

Means for Solving the Problems

[0006] A lighting fixture according to one aspect of the present disclosure comprises a plurality of LEDs, a plurality of lenses, a reflective member, and a fixture body. The plurality of LEDs are arranged in a ring shape. The plurality of lenses each concentrate the illumination light emitted from each of the plurality of LEDs. The reflective member reflects the illumination light concentrated by the plurality of lenses with its reflective surface. The fixture body houses the plurality of LEDs, the plurality of lenses, and the reflective member. The fixture body has an emission window for emitting the illumination light reflected by the reflective surface. The reflective surface is inclined to move closer to the emission window as it moves away from the plurality of lenses. A portion of the main body of the device surrounding the ejection window is formed to expand in diameter toward the outside of the main body of the device. A lighting fixture according to one aspect of the present disclosure comprises a plurality of LEDs, a plurality of lenses, a reflective member, and a fixture body. The plurality of LEDs are arranged in an annular shape. The plurality of lenses each concentrate the illumination light emitted from each of the plurality of LEDs. The reflective member reflects the illumination light concentrated by the plurality of lenses with its reflective surface. The fixture body houses the plurality of LEDs, the plurality of lenses, and the reflective member. The fixture body has an exit window for emitting the illumination light reflected by the reflective surface. The reflective surface is inclined to move closer to the exit window as it moves away from the plurality of lenses. A first reflective surface, which is part of the reflective surface and faces the plurality of lenses along the optical axis, is inclined at a constant angle with respect to the optical axis. A second reflective surface, which is part of the reflective surface and closer to the exit window than the first reflective surface, is formed in a concave shape. A third reflective surface, which is part of the reflective surface and closer to the exit window than the second reflective surface, is formed in a convex shape with a greater curvature than the second reflective surface. [Effects of the Invention]

[0007] The illuminating fixture described herein has the effect of expanding the illumination range of the illuminating light. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a perspective view showing a lighting fixture according to the present disclosure mounted in a recessed box. [Figure 2] Figure 2 is an exploded perspective view of the same lighting fixture. [Figure 3] Figure 3 is a longitudinal cross-sectional view of the same lighting fixture. [Figure 4] Figure 4 is a perspective view of the reflective member in the same lighting fixture. [Figure 5] Figure 5 is a perspective view of the lens block in the same lighting fixture. [Figure 6] Figure 6 is a front view of the LED module and lens block in the same lighting fixture. [Figure 7] Figure 7 is a longitudinal cross-sectional view of the main part of the lighting fixture shown above. [Figure 8] Figure 8 is a perspective view showing the illuminated state of the same lighting fixture. [Figure 9] Figure 9 shows the light distribution characteristics of the same lighting fixture. [Figure 10]Figure 10 shows the distribution of direct horizontal illuminance for the same lighting fixture. [Modes for carrying out the invention]

[0009] Hereinafter, lighting fixtures according to embodiments of this disclosure will be described in detail with reference to the drawings. However, the figures described in the following embodiments are schematic diagrams, and the ratios of the size and thickness of each component do not necessarily reflect the actual dimensional ratios. Furthermore, the configurations described in the following embodiments are merely examples of this disclosure. This disclosure is not limited to the following embodiments, and various modifications are possible depending on the design, etc., as long as the effects of this disclosure can be achieved.

[0010] (1) Overview The lighting fixture A1 according to this embodiment comprises a plurality of LEDs 100, a plurality of lenses 110, a reflective member 3, and a fixture body 2 (see Figures 2 and 3).

[0011] Multiple LEDs 100 are arranged in a ring shape. Multiple lenses 110 each concentrate the illumination light emitted from each of the multiple LEDs 100.

[0012] The reflective member 3 reflects the illumination light focused by the multiple lenses 110 onto its reflective surfaces (first reflective surface 310, second reflective surface 320, third reflective surface 330). The fixture body 2 houses the multiple LEDs 100, the multiple lenses 110, and the reflective member 3. The fixture body 2 has an emission window 20 for emitting the illumination light reflected from the reflective surfaces. The reflective surfaces are inclined so that they move closer to the emission window 20 as they move away from the multiple lenses 110.

[0013] In the embodiment, the lighting fixture A1 concentrates the illumination light emitted from multiple LEDs 100 with multiple lenses 110, and then reflects it off the reflective surface of the reflective member 3 to emit it out of the fixture body 2 through the emission window 20. However, in the embodiment, the lighting fixture A1 is tilted so that the reflective surface moves closer to the emission window 20 as it moves away from the multiple lenses 110, thus expanding the illumination range of the illumination light emitted from the emission window 20.

[0014] (2) Details of the lighting fixture according to the embodiment The lighting fixture A1 according to the embodiment (hereinafter abbreviated as the lighting fixture A1) includes a light source unit 1, a fixture body 2, a reflecting member 3, a globe 4, a power supply unit 5, etc. (see FIGS. 1 - 3). The lighting fixture A1 is attached to an embedded box B1 buried in the ground and is a lighting fixture called a so - called foot - stand used for lighting a garden walkway or the like (see FIG. 1). However, the lighting fixture according to the embodiment is not limited to a foot - stand.

[0015] (2 - 1) Embedded box The embedded box B1 has a box - shaped lower body B10 with an open upper surface, an upper body B11 that closes the upper surface of the lower body B10, and a mounting base B12 that protrudes upward from the center of the upper surface of the upper body B11 (see FIG. 1). The lower body B10, the upper body B11, and the mounting base B12 are all formed of a metal material such as stainless steel.

[0016] On each of the pair of opposing side surfaces of the lower body B10, two knockout holes (knock - out holes) B100 to which an electric wire pipe can be connected are provided. In the center of the upper surface of the upper body B11, a square hole for inserting an electric wire is provided.

[0017] The mounting base B12 has a cylindrical main body B120 and an annular mounting portion B121 that protrudes outward from the edge of one (lower) open end of the main body B120. The main body B120 and the mounting portion B121 are integrally formed by processing a metal plate such as a stainless - steel plate. A plurality of arc - shaped screw insertion grooves B122 are provided in the mounting portion B121. The mounting portion B121 is fixed to the upper body B11 by screwing a screw B123 inserted through those screw insertion grooves B122 into the screw holes of the upper body B11. On the upper part of the main body B120, two screw holes for attaching the fixture body 2 as described later are provided.

[0018] (2 - 2) Fixture body The fixture body 2 has a body 21 and a cover 22 (see FIGS. 1 and 2).

[0019] The body 21 is formed by die-casting aluminum into a cylindrical shape with open ends at both the top and bottom (see Figure 2). However, the material used to form the body 21 may be a metal other than aluminum, such as stainless steel.

[0020] The upper end portion 210 of the body 21 is formed to be thicker than the portion below the upper end portion 210 (see Figure 3). The upper surface of the upper end portion 210 is formed in a V-shape. Here, the outer slope of the upper end portion 210 is sometimes called the first slope 211, and the inner slope is sometimes called the second slope 212. In addition, two screw insertion holes 213 are provided at the bottom of the body 21. One screw 23 is inserted into each of these two screw insertion holes 213 for attaching the body 21 to the mounting base B12 of the embedded box B1 (see Figure 1).

[0021] The cover 22 has a disc-shaped top plate 220 and a cylindrical peripheral wall 221 that protrudes downward from the periphery of the top plate 220 all around (see Figures 2 and 3). The top plate 220 and the peripheral wall 221 are integrally formed by aluminum die casting. However, the material used to form the cover 22 may be a metal other than aluminum, such as stainless steel.

[0022] The cover 22 is connected to the body 21 via the globe 4 (see Figure 3). A circumferential opening (injection window 20) is formed between the upper end 210 of the body 21 and the peripheral wall 221 of the cover 22. However, the injection window 20 of the device body 2 is closed by the globe 4 (see Figure 3).

[0023] (2-3) Gloves The glove 4 has a cylindrical glove body 40, an outer flange 41 provided at the upper end of the glove body 40, and an inner flange 42 provided at the lower end of the glove body 40 (see Figures 2 and 3). The glove body 40, the outer flange 41, and the inner flange 42 are integrally formed from a translucent synthetic resin (such as acrylic resin or polycarbonate resin).

[0024] Multiple prisms 400 (five in the illustrated example) are formed on the outer circumferential surface of the globe body 40 so as to be arranged vertically. Each prism 400 is formed in an annular shape with a triangular prism cross-section along the radial direction of the globe body 40.

[0025] The outer flange portion 41 is formed in an annular shape and protrudes outward from the upper end of the globe body 40 around its entire circumference (see Figure 2). The outer flange portion 41 also has three recesses 410. Each recess 410 opens onto the outer circumferential surface of the outer flange portion 41. Furthermore, each recess 410 is arranged at equal intervals along the circumferential direction of the outer flange portion 41.

[0026] The inner flange portion 42 is formed in an annular shape and protrudes inward from the lower end of the globe body 40 around its entire circumference (see Figure 2). The inner flange portion 42 also has three through holes 420. Each through hole 420 is formed in a cylindrical shape and penetrates the inner flange portion 42 in the vertical direction. Furthermore, each through hole 420 is arranged at equal intervals along the circumferential direction of the inner flange portion 42.

[0027] The globe 4 is attached to the cover 22 by a retaining plate 43. The retaining plate 43 is formed in an annular shape from a metal plate (see Figure 2). The retaining plate 43 is provided with three screw holes 430. Each screw hole 430 penetrates the retaining plate 43 in the thickness direction (vertical direction). In addition, each screw hole 430 is arranged at equal intervals along the circumferential direction of the retaining plate 43.

[0028] Then, the outer flange portion 41 of the globe 4 is sandwiched between the lower surface of the top plate 220 of the cover 22 and the retaining plate 43, and three screws 431 inserted through the screw insertion holes 430 of the retaining plate 43 are screwed through the recesses 410 of the outer flange portion 41 into the three screw holes 223 of the top plate 220. As a result, the globe 4 is attached to the top plate 220 of the cover 22 such that the outer flange portion 41 is sandwiched between the lower surface of the top plate 220 of the cover 22 and the retaining plate 43 (see Figure 3).

[0029] Furthermore, the globe 4 is attached to the body 21 by a first mounting bracket 44 and a second mounting bracket 45. The first mounting bracket 44 is formed in an annular shape from a metal plate (see Figure 2). The first mounting bracket 44 has three screw holes 440. Each screw hole 440 is arranged at equal intervals along the circumferential direction of the first mounting bracket 44 (see Figure 2). Each screw hole 440 opens to the lower surface of the first mounting bracket 44.

[0030] The second mounting bracket 45 is formed in an annular shape from a metal plate (see Figure 2). The second mounting bracket 45 has three screw holes 450 and three recesses 451. Each screw hole 450 penetrates the second mounting bracket 45 in the thickness direction (vertical direction). Each screw hole 450 is arranged at equal intervals along the circumferential direction of the second mounting bracket 45. Each recess 451 opens on the outer edge of the second mounting bracket 45. Each recess 451 is arranged at equal intervals along the circumferential direction of the second mounting bracket 45. The second mounting bracket 45 is attached to the lower surface of the upper end 210 of the body 21 by screwing three screws 453, which are inserted through each recess 451, into three screw holes provided on the lower surface of the upper end 210 of the body 21 (see Figure 3).

[0031] Screws 454, which are inserted through the three screw insertion holes 450 of the second mounting bracket 45, are screwed one by one into the three screw holes 440 of the first mounting bracket 44 via cylindrical spacers 452, which are housed one by one in the three through holes 420 of the inner flange portion 42 (see Figure 3). As a result, the globe 4 is attached to the upper end portion 210 of the body 21 by the second mounting bracket 45 (see Figures 2 and 3).

[0032] (2-4) Reflective material The reflective member 3 has a first reflective portion 31, a second reflective portion 32, a third reflective portion 33, and a flange portion 34 (see Figure 4). The first reflective portion 31 is formed in the shape of a truncated cone, where the radius of the upper base is larger than the radius of the lower base. The second reflective portion 32 is formed in the shape of a concave curved surface that protrudes upward from the periphery of the upper base of the first reflective portion 31, expanding in diameter along its entire circumference. The third reflective portion 33 is formed in the shape of a convex curved surface that protrudes upward from the periphery of the upper end of the second reflective portion 32, expanding in diameter along its entire circumference. Here, the surface of the first reflective portion 31 is called the first reflective surface 310, the surface of the second reflective portion 32 is called the second reflective surface 320, and the surface of the third reflective portion 33 is called the third reflective surface 330. The first reflective surface 310, the second reflective surface 320, and the third reflective surface 330 are all mirror surfaces, and therefore reflective surfaces with a reflectivity of approximately 100%.

[0033] The first reflective portion 31, the second reflective portion 32, the third reflective portion 33, and the flange portion 34 are integrally formed, for example, by drawing an aluminum plate. However, the reflective member 3 may be formed integrally as a molded body of synthetic resin, with the first reflective portion 31, the second reflective portion 32, the third reflective portion 33, and the flange portion 34, and each surface may be made mirror-like by aluminum vapor deposition or the like.

[0034] The reflective member 3 is attached to the cover 22 of the fixture body 2. A cylindrical rib 222 protrudes downward from the underside of the top plate 220 of the cover 22 (see Figure 3). The rib 222 is also provided with three screw holes 223. The three screw holes 223 are arranged at equal intervals along the circumferential direction of the rib 222.

[0035] The reflective member 3 is attached to the cover 22 by having a flange portion 34 placed over the lower end of the rib 222, and screws 35 inserted through three screw insertion holes 340 provided in the flange portion 34 being screwed into three screw holes 223 of the rib 222 (see Figure 3).

[0036] (2-5) Light source unit The light source unit 1 includes an LED module 10, a lens block 11, a unit body 12, a fixing bracket 13, and the like (see Figures 2 and 3).

[0037] (2-5-1) LED module The LED module 10 comprises a disc-shaped substrate 101 and five LEDs 100 mounted on the top surface of the substrate 101 (see Heading 3 and Figure 6). Each LED 100 is composed of a chip that emits red (R) light, a chip that emits green (G) light, a chip that emits blue (B) light, and a chip that emits yellow (Y) light, all housed in a single package. In other words, each LED 100 can emit light of various colors (full color) by adjusting the current flowing through each color chip. The five LEDs 100 are mounted in a ring shape on the top surface of the substrate 101 (see Figure 6). However, some of the LEDs in the LED module 10 may emit single-color (e.g., white) light.

[0038] (2-5-2) Lens Block The lens block 11 has the same number of lenses 110 as the LEDs 100 (5), a connecting section 111 that connects these 5 lenses 110, and a plurality of positioning sections 112 (4 in the illustrated example) (see Figure 5). Each lens 110 is a collimating lens. Therefore, the illumination light emitted from each LED 100 is converted into parallel light (light parallel to the optical axis L1 of the LED 100) by each lens 110 and emitted from the lens block 11 (see Figure 7).

[0039] The connecting portion 111 has a bottomed cylindrical portion 1110 and an annular outer flange portion 1111 provided at the open end of the cylindrical portion 1110 (see Figure 5). The connecting portion 111 connects to the cylindrical portion 1110 by arranging five lenses 110 in an annular pattern on the inner bottom surface (see Figures 5 and 6).

[0040] Each positioning portion 112 is formed in a truncated cone shape with a tapered tip. Each positioning portion 112 positions the lens block 11 relative to the LED module 10 by inserting its tip into one of four grooves 102 provided on the periphery of the substrate 101 of the LED module 10 (see Figure 6). When positioned by the multiple positioning portions 112, the optical axis L1 of each paired LED 10 and the optical axis of the lens 110 substantially coincide. The five lenses 110, the connecting portion 111, and the four positioning portions 112 are integrally formed from a light-transmitting synthetic resin (for example, acrylic resin or polycarbonate resin).

[0041] (2-5-3) Unit body The unit body 12 is formed from aluminum die-cast into a cylindrical shape with openings at both the top and bottom ends and a partition wall 120 inside (see Figure 3). However, the material forming the body 21 may be a metal other than aluminum, such as stainless steel.

[0042] The partition wall 120 is formed on a plane parallel to the upper and lower end surfaces of the unit body 12. In the following description, the space above the partition wall 120 within the internal space of the unit body 12 will be referred to as the first accommodation space 121, and the space below the partition wall 120 will be referred to as the second accommodation space 122 (see Figure 3).

[0043] The LED module 10 and lens block 11 are housed in the first housing space 121. The LED module 10 is screwed to the partition wall 120 with a thermal conductive sheet 123 sandwiched between it and the upper surface of the partition wall 120 (see Figure 3).

[0044] Furthermore, a step 124 is formed on the inner circumferential surface of the first housing space 121. The outer flange portion 1111 of the connecting portion 111 of the lens block 11 is placed on the step 124. However, a sealing member 113 is attached to the outer flange portion 1111 (see Figure 3). The sealing member 113 is made of a rubber material such as silicone rubber and has a C-shaped annular cross-section.

[0045] A mounting plate 17 is attached to the upper end surface of the unit body 12 (see Figures 2 and 3). The mounting plate 17 is formed in an annular shape from a metal plate such as a stainless steel plate. The mounting plate 17 is screwed to the upper end surface of the unit body 12 such that a sealing member 113 is sandwiched between the mounting plate 17 and the step 124 of the unit body 12. In other words, the inner circumferential surface of the first housing space 121 and the gap between the upper surface of the step 124 and the outer flange portion 1111 are sealed by the sealing member 113. As a result, rainwater and other substances are prevented from entering the first housing space 121.

[0046] The second housing space 122 houses the power supply unit 5 (see Figure 3). The power supply unit 5 includes, for example, a power conversion circuit that converts AC power supplied from the commercial power grid into DC power, and four constant current circuits corresponding to the four color chips of each LED 100.

[0047] The power conversion circuit includes, for example, a full-wave rectifier circuit such as a diode bridge, a boost chopper circuit, and a smoothing capacitor. The power conversion circuit converts the AC voltage input from the power system (for example, an AC voltage with a power supply frequency of 60 Hz and an effective value of 100 V) into a DC voltage that is higher than the peak voltage of the AC voltage.

[0048] All four constant current circuits have the same circuit configuration. Preferably, each constant current circuit has a buck converter, such as a step-down chopper circuit. The constant current circuit has a buck converter that steps down the DC voltage output from the power conversion circuit and operates to match the output current supplied to each color chip of the LED module 10 to its respective target current value. Each constant current circuit is controlled by a control circuit. The control circuit receives a digital signal (DMX signal) compliant with the DMX (Digital Multiplex) 512 communication protocol from an external source via a signal line, and adjusts the target current value of the buck converter according to the digital signal to dim and color-tune the LED module 10. The power conversion circuit, the four constant current circuits, and the control circuit are all printed circuits (see Figure 3) in which various circuit components 51 constituting these circuits are mounted on a printed circuit board 50.

[0049] The power supply unit 5 is housed in the second housing space 122 by screwing the printed circuit board 50 to the lower surface of the partition wall 120. However, a thermal conductive sheet 125 is placed between the printed circuit board 50 and the lower surface of the partition wall 120 (see Figure 3). The power supply unit 5 is electrically connected to the LED module 10 via wires that are routed through a wiring hole 1200 that penetrates the partition wall 120 vertically (see Figure 3).

[0050] The power supply unit 5 is supplied with AC power from the power grid through the lead wires 14 and the power cable. The lead wires 14 are drawn into the second housing space 122 through a wiring hole 126 that penetrates the side wall of the unit body 12. However, the lead wires 14 are fixed to the outer surface of the unit body 12 by a cable gland 127 (see Figure 3). The cable gland 127 fixes the lead wires 14 to the unit body 12 and seals the gap between the lead wires 14 and the wiring hole 126 of the unit body 12. The lead wires 14 consist of three wires for AC power, including a ground wire, and four signal wires for DMX signals, all covered with a sheath (see Figure 3).

[0051] The opening on the lower surface of the unit body 12 is closed by a lid 15 and a sealing member 16. The lid 15 is formed in the shape of a disc from a metal plate such as a stainless steel plate. The sealing member 16 is formed in the shape of an annular ring from a rubber material such as silicone rubber. The sealing member 16 is fitted into a groove 128 provided on the lower end surface of the unit body 12 (see Figure 3). The lid 15 is screwed to the lower end surface of the unit body 12. By sealing the gap between the unit body 12 and the lid 15 with the sealing member 16, the intrusion of rainwater and other liquids into the second storage space 122 is prevented.

[0052] (2-5-4) Fixing bracket The fixing bracket 13 is formed in a U-shape and has a pair of side pieces 130 and a connecting piece 131 that connects one end (lower end) of the pair of side pieces 130 in the longitudinal direction (see Figures 2 and 3). The pair of side pieces 130 and the connecting piece 131 are integrally formed from a metal plate such as a stainless steel plate. The fixing bracket 13 is attached to the unit body 12 by screwing the pair of side pieces 130 to the unit body 12 with the unit body 12 placed between the pair of side pieces 130 and the connecting piece 131 placed below the unit body 12 (see Figure 2).

[0053] A pair of side pieces 130 are each provided with an ear piece 132 at their upper end (see Figure 2). These ear pieces 132 are formed integrally with the side pieces 130 by bending the upper end portions of each side piece 130 outward. A screw insertion hole 1320 passes through each ear piece 132. Each ear piece 132 is screwed to the third mounting bracket 46 with two screws inserted through its respective screw insertion hole 1320. The third mounting bracket 46 is formed in the same shape as the second mounting bracket 45 (see Figure 2). The third mounting bracket 46 is attached to the lower surface of the upper end portion 210 of the body 21 by three screws 453, overlapping the second mounting bracket 45 from below.

[0054] However, the light source unit 1 (unit body 12) is attached to the body 21 by the fixing bracket 13 and the third mounting bracket 46 (see Figure 2).

[0055] (2-6) Installation procedure for lighting fixtures Lighting fixture A1 is installed using the following procedure.

[0056] First, the worker performing the installation work buries the embedded box B1 in the ground so that the tip of the main body B120 of the mounting base B12 is above the ground surface. At this time, the worker connects the conduit to the necessary punched holes B100 in the lower main body B10 and pulls the power cable and signal cable into the embedded box B1 through the conduit.

[0057] Next, the worker connects the power cable and signal cable wires that were brought into the embedded box B1 to the wires and signal wires of the lead wire 14 of the lighting fixture A1. Details of the connection work are omitted.

[0058] Next, the worker inserts the main body B120 of the mounting base B12, which is exposed above ground level, into the body 21 through the opening on the underside of the body 21. Then, the worker inserts one fixing screw 23 into each of the two screw insertion holes 213 provided on the lower part of the body 21. Furthermore, the worker screws each fixing screw 23 into the screw holes provided in the main body B120 of the mounting base B12, thereby fixing the device body 2 to the mounting base B12 (see Figure 1).

[0059] The installation of lighting fixture A1 is completed using the above procedure. However, lighting fixture A1 is installed with the fixture body 2 protruding from the ground surface (see Figure 8).

[0060] (3) Advantages of the lighting fixture according to the embodiment In lighting fixture A1, the illumination light emitted from each of the five LEDs 100 is individually focused by the five lenses 110 to become approximately parallel light, which is emitted from the light source unit 1 towards the reflector 3 (see Figure 7). The illumination light emitted from the light source unit 1 is reflected by the reflective surfaces of the reflector 3 (first reflective surface 310, second reflective surface 320, third reflective surface 330) and illuminates the area around lighting fixture A1 through the emission window 20 of the fixture body 2 (see Figure 8).

[0061] Here, the reflective surfaces of the reflective member 3 (first reflective surface 310, second reflective surface 320, third reflective surface 330) are inclined to approach the emission window 20 as they move away from the multiple lenses 110 (from bottom to top) (see Figure 7). As a result, the lighting fixture A1 can illuminate almost all of the illumination light emitted from the LED module 10 (five LEDs 100) through the emission window 20 of the fixture body 2 to the area around the fixture body 2. Consequently, the lighting fixture A1 can expand the illumination range of the illumination light emitted from the emission window 20.

[0062] In addition, in lighting fixture A1, the fixture body 2 is formed in a cylindrical shape, and the emission window 20 is formed in an annular shape on the circumferential surface of the fixture body 2. Therefore, lighting fixture A1 can irradiate illumination light all around the cylindrical fixture body 2.

[0063] Furthermore, in the lighting fixture A1, the first reflective surface 310, which is part of the reflective surface and faces the multiple lenses 110 along the optical axis L1 of the multiple lenses 110, is inclined at a certain angle (for example, 45 degrees) with respect to the optical axis L1 (see Figures 3 and 7). Therefore, the illumination light traveling from the light source unit 1 toward the reflective member 3 approximately parallel to the optical axis L1 is reflected at approximately a right angle by the first reflective surface 310 (see Figure 7). Thus, the lighting fixture A1 can emit almost all of the illumination light reflected by the first reflective surface 310 through the emission window 20 of the fixture body 2. As a result, the lighting fixture A1 can improve the total luminous flux of the illumination light emitted from the emission window 20.

[0064] Furthermore, in the lighting fixture A1, a second reflective surface 320, which is part of the reflective surface and closer to the emission window 20 than the first reflective surface 310, is formed in a concave curved shape (see Figure 7). That is, the lighting fixture A1 can direct the illumination light incident outside the first reflective surface 310 on the reflective surface of the reflective member 3 towards the emission window 20 by reflecting it off the concave curved second reflective surface 320. As a result, the lighting fixture A1 can further improve the total luminous flux of the illumination light emitted from the emission window 20.

[0065] Furthermore, in the lighting fixture A1, the third reflective surface 330, which is part of the reflective surface and closer to the emission window 20 than the second reflective surface 320, is formed as a convex curved surface with a greater curvature than the second reflective surface 320 (see Figure 7). In other words, the lighting fixture A1 can direct the illumination light incident outside the second reflective surface 320 on the reflective surface of the reflective member 3 towards the emission window 20 by reflecting it off the convex curved third reflective surface 330. As a result, the lighting fixture A1 can further improve the total luminous flux of the illumination light emitted from the emission window 20.

[0066] In addition, in lighting fixture A1, the reflective member 3 has a flat outer periphery (flange portion 34) closest to the light outlet window 20. Therefore, lighting fixture A1 allows the reflective member 3 to be attached to the fixture body 2 (cover 22) using the flat outer periphery (flange portion 34). As a result, lighting fixture A1 improves the workability of attaching the reflective member 3 to the fixture body 2.

[0067] Incidentally, lighting fixture A1 further includes a globe 4 that is transparent to illumination light and is housed in the fixture body 2 so as to block the light outlet window 20. In other words, lighting fixture A1 can block the light outlet window 20 with a light-transmitting globe 4, thereby minimizing the impact on the illumination light emitted from the light outlet window 20 while preventing foreign matter and rainwater from entering the fixture body 2 through the light outlet window 20.

[0068] Furthermore, the globe 4 is capable of diffusing illumination light. Specifically, multiple prisms 400 are provided on the outer surface of the globe body 40 of the globe 4, and these prisms 400 diffuse the illumination light emitted from the globe 40 of the globe 4. Thus, because the globe 4 is capable of diffusing illumination light, the lighting fixture A1 can suppress glare from the illumination light emitted from the emission window 20.

[0069] Incidentally, in lighting fixture A1, the upper end portion 210 of the body 21 surrounding the light-emitting window 20 is formed to widen in diameter toward the outside of the fixture body 2 (see Figure 7). In other words, the first inclined surface 211 of the upper end portion 210 is inclined downward toward the outside of the body 21. As a result, lighting fixture A1 reflects the light emitted from the globe 4 through the light-emitting window 20 off the first inclined surface 211, allowing the illumination light emitted from the light-emitting window 20 to illuminate a wider area.

[0070] Furthermore, in the lighting fixture A1, the lens block 11 has a plurality of lenses 110 and a connecting portion 111 that connects the plurality of lenses 110. In other words, the lighting fixture A1 can improve the workability of assembly work by constructing the lens block 11 by connecting a plurality (five in this embodiment) of lenses 110 with the connecting portion 111.

[0071] Here, we will briefly explain the light distribution characteristics of lighting fixture A1.

[0072] Figure 9 shows the light distribution characteristics on a plane (vertical plane) perpendicular to the ground surface passing through the axis of lighting fixture A1. The first light distribution characteristic α1, shown by a solid line in Figure 9, is the light distribution characteristic of the first vertical plane V1 in Figure 8. The second light distribution characteristic α2, shown by a dashed line in Figure 9, is the light distribution characteristic of the second vertical plane V2 in Figure 8. Note that both the first vertical plane V1 and the second vertical plane V2 are virtual planes that are orthogonal to each other.

[0073] As is clear from the first light distribution characteristic α1 and the second light distribution characteristic α2, the lighting fixture A1 can emit illumination light in a direction approximately horizontal to the ground surface, covering the entire circumference (360 degrees).

[0074] Furthermore, Figure 10 shows the distribution of direct horizontal illuminance from lighting fixture A1. In Figure 10, the horizontal axis represents the horizontal distance with the position of lighting fixture A1 as the origin, and the vertical axis represents illuminance. However, the illuminance on the vertical axis is shown on a logarithmic scale.

[0075] In Figure 10, the multiple solid lines each represent the illuminance distribution in multiple horizontal planes that are parallel to the ground surface and at different heights from the ground surface. For example, solid line β1 represents the illuminance distribution on a horizontal plane whose height from the ground surface is equal to the height from the top to the center of the light outlet window 20 in the fixture body 2. Solid line β0 represents the illuminance distribution on a horizontal plane at the same height as the ground surface.

[0076] However, as is clear from the distribution of direct horizontal illuminance shown in Figure 10, lighting fixture A1 can illuminate a wide area all around it.

[0077] (4) Summary A lighting fixture (A1) according to a first aspect of this disclosure comprises a plurality of LEDs (100), a plurality of lenses (110), a reflector (3), and a fixture body (2). The plurality of LEDs (100) are arranged in a ring shape. The plurality of lenses (110) individually concentrate the illumination light emitted from each of the plurality of LEDs (100). The reflector (3) reflects the illumination light concentrated by the plurality of lenses (110) with reflective surfaces (first reflective surface 310; second reflective surface 320; third reflective surface 330). The fixture body (2) houses the plurality of LEDs (100), the plurality of lenses (110), and the reflector (3). The fixture body (2) has an emission window (20) for emitting the illumination light reflected by the reflective surfaces. The reflective surfaces are inclined so that they move closer to the emission window (20) as they move away from the plurality of lenses (110).

[0078] In the first embodiment of the lighting fixture (A1), the reflective surface is tilted so that it approaches the emission window (20) as it moves away from the multiple lenses (110), thereby expanding the illumination range of the illumination light emitted from the emission window (20).

[0079] A lighting fixture (A1) according to a second aspect of this disclosure can be realized by combining it with the first aspect. In the lighting fixture (A1) according to the second aspect, it is preferable that a first reflective surface (310), which is part of the reflective surface and faces the plurality of lenses (110) along the optical axis (L1) of the plurality of lenses (110), is inclined at a certain angle with respect to the optical axis (L1).

[0080] In the second embodiment of the lighting fixture (A1), almost all of the illumination light reflected by the first reflective surface (310) can be emitted through the emission window (20) of the fixture body (2), thereby improving the total luminous flux of the illumination light emitted from the emission window (20).

[0081] A lighting fixture (A1) according to a third aspect of this disclosure can be realized by combining it with the second aspect. In the lighting fixture (A1) according to the third aspect, it is preferable that the second reflective surface (320), which is part of the reflective surface and is closer to the emission window (20) than the first reflective surface (310), is formed in a concave curved shape.

[0082] The lighting fixture (A1) according to the third embodiment can direct illumination light incident outside the first reflective surface (310) on the reflective surface of the reflective member (3) toward the emission window (20) by reflecting it off the concave curved second reflective surface (320). As a result, the lighting fixture (A1) according to the third embodiment can further improve the total luminous flux of the illumination light emitted from the emission window (20).

[0083] A lighting fixture (A1) according to a fourth aspect of this disclosure can be realized by combining it with a third aspect. In the lighting fixture (A1) according to the fourth aspect, it is preferable that the third reflective surface (330), which is part of the reflective surface and is closer to the emission window (20) than the second reflective surface (320), is formed in a convex curved shape with a greater curvature than the second reflective surface (320).

[0084] The lighting fixture (A1) according to the fourth embodiment can direct illumination light incident outside the second reflective surface (320) on the reflective surface of the reflective member (3) toward the emission window (20) by reflecting it off the convex curved third reflective surface (330). As a result, the lighting fixture (A1) according to the fourth embodiment can further improve the total luminous flux of the illumination light emitted from the emission window (20).

[0085] A lighting fixture (A1) according to a fifth aspect of this disclosure can be realized by combining it with any of the first to fourth aspects. In the lighting fixture (A1) according to the fifth aspect, it is preferable that the outer peripheral portion (flange portion 34) of the reflecting member (3) closest to the emission window (20) is formed to be flat.

[0086] In the fifth embodiment of the lighting fixture (A1), the reflective member (3) can be attached to the fixture body (2) on its flat outer circumference, thereby improving the workability of attaching the reflective member (3) to the fixture body (2).

[0087] A luminaire (A1) according to the sixth aspect of this disclosure can be realized in combination with any of the first to fifth aspects. Preferably, the luminaire (A1) according to the sixth aspect further comprises a globe (4) that is capable of transmitting illumination light and is housed in the fixture body (2) so as to close the emission window (20).

[0088] The lighting fixture (A1) according to the sixth embodiment can prevent foreign matter and rainwater from entering the fixture body (2) from the exit window (20) while suppressing the influence on the lighting light emitted from the exit window (20) by covering the exit window (20) with a globe (4) that can transmit lighting light.

[0089] A lighting fixture (A1) according to the seventh aspect of this disclosure can be realized by combining it with the sixth aspect. In the lighting fixture (A1) according to the seventh aspect, it is preferable that the globe (4) is capable of diffusing the illumination light.

[0090] In the seventh embodiment of the lighting fixture (A1), the globe (4) is capable of diffusing the illumination light, thus suppressing glare from the illumination light emitted from the emission window (20).

[0091] A lighting fixture (A1) according to the eighth aspect of this disclosure can be realized by combining it with any of the first to seventh aspects. In the lighting fixture (A1) according to the eighth aspect, it is preferable that a part of the lighting fixture (A1) surrounding the light outlet window (20) (the first inclined surface 211 of the upper end portion 210) is formed to expand in diameter toward the outside of the fixture body (2).

[0092] The illuminating fixture (A1) according to the eighth embodiment reflects the light emitted from the globe (4) through the emission window (20) onto the first inclined surface (211), allowing the illumination light emitted from the emission window (20) to irradiate a wider area.

[0093] A lighting fixture (A1) according to the ninth aspect of this disclosure can be realized in combination with any of the first to eighth aspects. The lighting fixture (A1) according to the ninth aspect preferably further comprises a lens block (11). The lens block (11) preferably has a plurality of lenses (110) and a connecting portion (111) that connects the plurality of lenses (110).

[0094] The lighting fixture (A1) according to the ninth embodiment improves the workability of assembly work by connecting a plurality of lenses (110) with a connecting part (111) to form a lens block (11).

[0095] A lighting fixture (A1) according to the tenth aspect of this disclosure can be realized in combination with any of the first to ninth aspects. In the lighting fixture (A1) according to the tenth aspect, the fixture body (2) is preferably formed in a cylindrical shape. The emission window (20) is preferably formed in an annular shape on the circumferential surface of the fixture body (2).

[0096] The lighting fixture (A1) according to the tenth embodiment can irradiate illumination light all around the cylindrical fixture body (2). [Explanation of symbols]

[0097] A1 Lighting fixtures L1 optical axis 2. Main body of the device 3 Reflective material 4 Gloves 11 Lens Block 20 Ejection window 34 Flange section 100 LED 110 Lens 111 Connection section 210 Upper end 211 1st slope 310 1st reflective surface 320 Second reflective surface 330 Third reflective surface

Claims

1. Multiple LEDs arranged in a ring, Multiple lenses for individually focusing the illumination light emitted from each of the multiple LEDs, A reflective member that reflects the illumination light focused by the plurality of lenses onto a reflective surface, A fixture body housing the plurality of LEDs, the plurality of lenses, and the reflective member, Equipped with, The fixture body has an emission window for emitting the illumination light reflected from the reflective surface, The reflective surface is inclined to move closer to the emission window as it moves away from the plurality of lenses. A portion of the fixture body surrounding the ejection window is formed to expand in diameter toward the outside of the fixture body. Lighting fixtures.

2. A plurality of LEDs arranged in a ring, Multiple lenses for individually focusing the illumination light emitted from each of the multiple LEDs, A reflective member that reflects the illumination light focused by the plurality of lenses onto a reflective surface, A fixture body housing the plurality of LEDs, the plurality of lenses, and the reflective member, Equipped with, The fixture body has an emission window for emitting the illumination light reflected from the reflective surface, The reflective surface is inclined to move closer to the emission window as it moves away from the plurality of lenses. A part of the reflective surface, the first reflective surface facing the plurality of lenses along the optical axis of the plurality of lenses, is inclined at a certain angle with respect to the optical axis. A second reflective surface, which is part of the reflective surface and closer to the exit window than the first reflective surface, is formed in a concave curved shape. A third reflective surface, which is part of the reflective surface and closer to the exit window than the second reflective surface, is formed in the shape of a convex curved surface with a greater curvature than the second reflective surface. Lighting fixtures.

3. A first reflective surface which is part of the reflective surface and faces the plurality of lenses along the optical axis of the plurality of lenses is inclined at a certain angle with respect to the optical axis, The lighting fixture according to claim 1.

4. The second reflective surface, which is part of the reflective surface and is closer to the exit window than the first reflective surface, is formed in a concave curved shape. The lighting fixture according to claim 3.

5. The third reflective surface, which is part of the reflective surface and is closer to the exit window than the second reflective surface, is formed in the shape of a convex curved surface with a greater curvature than the second reflective surface. The lighting fixture according to claim 4.

6. The reflective member has a flat outer peripheral portion that is closest to the emission window. The lighting fixture according to claim 2.

7. The device further comprises a globe that is transparent to the illumination light and is housed in the main body of the device so as to block the emission window, The lighting fixture according to claim 2.

8. The globe is capable of diffusing the illumination light, The lighting fixture according to claim 7.

9. A part of the apparatus body surrounding the ejection window is formed to expand in diameter toward the outside of the apparatus body, The lighting fixture according to claim 2.

10. Further comprising a lens block, The lens block comprises the plurality of lenses and a connecting portion that connects the plurality of lenses. The lighting fixture according to claim 2.

11. The main body of the device is formed in a cylindrical shape, The ejection window is formed in an annular shape on the circumferential surface of the device body. The lighting fixture according to claim 2.

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