JP2014017194A - Lighting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting apparatus capable of preventing a shadow of a projection part from being cast on a shade.SOLUTION: A lighting apparatus 10 includes an apparatus body 11, an LED element 35, and a shade 14. The apparatus body 11 has a projection part 21 which protrudes from the center of one surface of the apparatus body 11. The LED element 35 is arranged on the one surface of the apparatus body 11 at a periphery of the projection part 21 in the circumferential direction. The shade 14 covers one surface side of the apparatus body 11. A center part 14a of the shade 14 opposed to the center of the apparatus body 11 is arranged at a position more apart from the side of the apparatus body 11 than the position of an intersection P of virtual lines 48 extending from the LED elements 35 on the circumference and coming into contact with a peripheral part of the projection part 21.

Description

  Embodiments described herein relate generally to a lighting fixture using a semiconductor light emitting element.

  For example, in a lighting fixture such as a ceiling light, a plurality of LED elements are arranged on the lower surface of the fixture body, and the lower surface side of the fixture body is covered with a shade.

  In general, a protrusion projecting from the lower surface of the instrument body is provided at the center of the instrument body by the instrument body itself or another cover. The projecting portion is provided with an attachment structure for attaching to the hook ceiling, or a lighting circuit for supplying lighting power to the LED element. Therefore, the some LED element is arrange | positioned along the circumferential direction on the lower surface of the instrument main body around the protrusion.

JP 2011-134684 A

  However, since the protruding portion protrudes from the center of the lower surface of the instrument body, and the LED elements are arranged along the circumferential direction on the lower surface of the instrument body around the protruding portion, the LED element moves toward the center of the instrument body. There is a problem that the light that heads out is blocked by the protrusion, and the shadow of the protrusion blocking the light is easily reflected in the central part of the shade.

  The problem to be solved by the present invention is to provide a luminaire that can prevent the shadow of the protrusion from appearing on the shade.

  The lighting fixture of embodiment has a fixture main body, a semiconductor light-emitting device, and a shade. The instrument body has a protrusion that projects from the center of one surface of the instrument body. The semiconductor light emitting element is disposed along the circumferential direction on one surface of the instrument body around the protrusion. The shade covers one side of the instrument body. The central part of the shade that faces the center of the instrument body is located farther from the instrument body side than the intersection point where the imaginary line that contacts the periphery of the protrusion from the semiconductor light emitting element on the circumference intersects the center side of the instrument body. Is arranged.

  According to the present invention, the central portion of the shade facing the center of the instrument main body is arranged from the position of the intersection where the virtual line contacting the periphery of the protrusion from the semiconductor light emitting element on the circumference intersects the central side of the instrument main body. By arranging at a position away from the main body side, it is possible to prevent the shadow of the protruding portion from appearing on the shade.

It is sectional drawing which shows one Embodiment and shows the lighting fixture from which the protrusion height of the protrusion part from an instrument main body differs in (a) and (b). It is a perspective view of the decomposition | disassembly state of a lighting fixture same as the above. It is sectional drawing of the light distribution control body of a lighting fixture same as the above. It is a light distribution diagram by a light distribution control body same as the above.

  Hereinafter, an embodiment will be described with reference to FIGS. 1 to 4.

  As shown in FIGS. 1 and 2, the luminaire 10 is a circular ceiling light that is attached to a hook ceiling installed on a ceiling surface via an adapter. The direction in which light is emitted from the lighting fixture 10 is referred to as the front side, and the opposite side to the front side is referred to as the back side. The front side and the back side correspond to the lower side and the upper side of the installed lighting fixture 10. .

  The lighting fixture 10 includes a fixture main body 11, a light emitting module substrate 12, a translucent cover 13 and a shade 14 are attached to the lower surface side of the fixture main body 11, and a frame 15 and a case 16 are attached to the upper surface side of the fixture main body 11. It is attached. The case 16 is provided with an adapter guide 17 and a lighting circuit 18 as instrument mounting portions.

  The instrument body 11 is made of metal and has a disk shape. On the lower surface, which is one surface of the instrument body 11, a circular projecting portion 21 is integrally projected in the central region, and a substrate placement portion 22 is formed around the projection portion 21 as an annular semiconductor light emitting element placement portion. An annular recess 24 is formed between the portion 22 and the peripheral flange portion 23.

  An opening 25 into which the adapter guide 17 is fitted is formed at the center of the projecting portion 21, a window hole 26 is formed at a side portion of the opening 25, and a long hole shape that is long in the circumferential direction as a mounted portion is formed at the peripheral portion. A plurality of claw insertion holes 27 and one mounting hole 28 for screwing are formed.

  An annular base portion 29 for attaching the case 16 is formed on the substrate placement portion 22 so as to protrude from the upper surface side of the instrument body 11. A plurality of hemispherical convex portions 30 project from the peripheral portion of the substrate placement portion 22, and a plurality of long hole-like claw insertion holes 27 are formed in the circumferential direction.

  A plurality of shade attachment brackets 31 for attaching the shade 14 in a detachable manner by rotating the shade 14 with respect to the instrument body 11 are attached to the recess 24. The seed mounting bracket 31 is accommodated in the recess 24 without protruding from the board placement portion 22.

  The substrate 12 of the light emitting module is formed in a semi-annular shape, and the pair of substrates 12 are annularly combined by arranging the pair of substrates 12 on the substrate arrangement portion 22 of the instrument body 11. The substrate 12 is made of a material such as metal, ceramics, and resin. A plurality of fitting holes 34 are formed in the peripheral portion of the substrate 12 so as to be concavo-convexly fitted to the respective convex portions 30.

  A wiring pattern is formed on the front surface of the substrate 12, and a plurality of semiconductor light emitting elements including LED elements, organic ELs, and the like are mounted on the concentric circles, connected to the wiring pattern. In the embodiment, a surface-mount type SMD package type LED element 35 is used as the semiconductor light emitting element, and the plurality of LED elements 35 are arranged on the substrate 12 at equal intervals along the circumferential direction and are concentrically arranged. Are arranged in two rows. The light emitting part of the LED element 35 is directed in the opposite direction with respect to the substrate 12 and in the downward direction when the lighting fixture 10 is installed. Further, on the front surface of the substrate 12, a reflection surface 36 having a high reflectance characteristic is formed so as to cover the wiring pattern.

  The translucent cover 13 is made of a transparent resin having light transmissivity and light guide properties, and is formed in an annular shape with an opening 39 in the center. The translucent cover 13 has an annular, flat plate-like cover portion 40 that is formed in such a size that the substrate 12 can be covered with the instrument body 11.

  The cover portion 40 is formed with two rows of concentric circular light distribution control bodies 41 for controlling the light distribution of the light emitted from the LED elements 35 facing the LED elements 35 arranged in two rows on the concentric circles. Has been. As shown in FIG. 3, the light distribution control body 41 is formed in a mountain shape having a concave portion 42 that accommodates the LED element 35, and an incident surface 41 a that faces the concave portion 42 and on which light from the LED element 35 is incident is formed. On the outer surface, an emission surface 41b for emitting the light incident on the light distribution control body 41 is formed.

  The light distribution control body 41 is formed in an axially symmetric cross-sectional shape around the reference axis 43 and in the outer direction opposite to the central side direction of the instrument body 11, and the reference axis 43 is the light emitting portion of the LED element 35. It is located on the outer side of the instrument body 11 from the center 35a. In other words, the center 35a of the light emitting part of the LED element 35 is located in the center side direction of the instrument body 11 from the reference axis 43 of the light distribution control body 41.

  On at least one of the entrance surface 41a and the exit surface 41b on the outer peripheral side of the reference axis 43 of the light distribution control body 41, for example, a light diffusing surface is formed by a concave / convex pattern. Further, the diffusion characteristics of the light diffusing surface are formed so that the diffusivity gradually increases from the central direction of the instrument body 11 toward the outer side. In addition, among the light distribution control bodies 41 in a plurality of concentric circles, the light distribution control body 41 on the outer peripheral side is formed so that the diffusion degree of the light diffusion surface is larger than the light distribution control body 41 on the inner peripheral side. Has been.

  As shown in FIG. 2, a plurality of claw portions 44 that can be inserted into the claw insertion holes 27 of the instrument main body 11 are integrally formed on the back side of the translucent cover 13 on the inner peripheral side and the outer peripheral side. Yes. The plurality of claw portions 44 are formed in a substantially L shape toward the mounting rotation direction which is one of the circumferential directions of the translucent cover 13. Then, by inserting each nail 44 into each nail insertion hole 27 of the instrument body 11 and rotating the translucent cover 13 in the mounting rotation direction, the tip of each nail 44 is brought to the back side of the instrument body 11. Ride and pull the translucent cover 13 toward the instrument main body 11, and the nail 44 is caught on the back side of the instrument main body 11 so that the substrate 12 is sandwiched between the instrument main body 11 and the translucent cover 13. The main body 11 and the translucent cover 13 are fixed.

  A screw insertion hole 46 is provided at one location on the inner peripheral portion of the translucent cover 13. By screwing the screw into the mounting hole 28 of the instrument body 11 through the screw insertion hole 46, the translucent cover 13 is restricted from rotating in the detaching rotation direction opposite to the mounting rotation direction.

  The shade 14 is made of a translucent milky white resin, the upper surface side is opened, and an attachment step portion to be attached to each of the shade attachment brackets 31 is formed on the inner peripheral edge portion on the upper surface side. The shade 14 attached to the instrument body 11 covers the lower surface of the instrument body 11, the substrate 12, the translucent cover 13, and the like.

  As shown in FIG. 1 (a), the central portion 14a of the shade 14 that faces the center of the instrument body 11 is an imaginary line that is a tangent line that extends from each LED element 35 on the circumference in contact with the peripheral portion of the protruding portion 21. 48 is arrange | positioned in the position away from the instrument main body 11 side from the position of the intersection P which cross | intersects in the center side of the instrument main body 11. FIG.

  As shown in FIG. 2, the frame 15 is made of a resin having translucency and is formed in an annular shape, and the inner peripheral edge is attached to the upper peripheral edge of the instrument body 11. A pair of sensor window holes 50 are formed at one location on the lower surface of the frame 15.

  Further, the case 16 is made of metal, and a side wall portion 53 protruding to the lower surface side is formed in the peripheral portion, and the side wall portion 53 is attached on the base portion 29 of the instrument main body 11. A housing space 54 for housing and attaching the adapter guide 17 and the lighting circuit 18 is formed in the case 16 between the upper surface of the appliance body 11. The upper surface of the case 16 is compressed with the ceiling surface when the lighting device 10 is installed on the ceiling surface to prevent rattling of the lighting device 10 and to prevent the lighting device 10 from rotating. A cushion material 55 is attached.

  The adapter guide 17 is formed in a cylindrical shape and is detachably attached to the adapter by being fitted into an adapter mounted on a hook ceiling installed on the ceiling surface. The adapter guide 17 is provided with a night light 58 facing the lower surface from the window hole 26 of the instrument body 11, a remote control number changeover switch 59, and the like. The night light 58, the remote control number changeover switch 59, and the like may be arranged on the substrate of the lighting circuit 18.

  The lighting circuit 18 includes a circuit board 62 disposed around the adapter guide 17 and fixed to the case 16 side. Various electronic components constituting the lighting circuit 18 are mounted on the circuit board 62. Yes. Commercial AC power is input to the power input side of the lighting circuit 18 through an adapter and hook ceiling, and the power output side of the lighting circuit 18 is connected to the plurality of LED elements 35 through the wiring pattern of the substrate 12. Then, the lighting circuit 18 rectifies and smoothes the AC power, converts it to a predetermined DC power, and supplies it to the LED element 35.

  Further, the lighting circuit 18 has a function of automatically adjusting the output of the LED element 35 by detecting the brightness of the illumination space in which the luminaire 10 is installed by the illuminance sensor 63.

  The illuminance sensor 63 is housed in a sensor case 65 attached to the upper surfaces of the instrument body 11 and the frame body 15 and is disposed to face the sensor window hole 50 of the frame body 15.

  Next, in order to assemble the lighting fixture 10, the case 16 to which the adapter guide 17 and the lighting circuit 18 are attached is attached to the upper surface of the fixture body 11. Further, the frame 15 is attached to the upper surface of the instrument body 11, the illuminance sensor 63 is electrically connected to the lighting circuit 18, and the sensor case 65 holding the illuminance sensor 63 is connected to the upper surfaces of the instrument body 11 and the frame 15. Attach to.

  Each substrate 12 is placed on the substrate placement portion 22 in a state where the substrate placement portion 22 of the instrument body 11 is turned upside down, and each fitting hole 34 of the substrate 12 is placed on the substrate placement portion 22. Concave and convex portions are fitted to the respective convex portions 30. Thereby, the position of the substrate 12 in the direction (horizontal direction) along the surface of the substrate placement portion 22 of the instrument body 11 is positioned and held. Further, wiring is performed between both the substrates 12 and between the substrate 12 and the lighting circuit 18.

  While covering the substrate 12, the claw portions 44 of the translucent cover 13 are inserted into the nail insertion holes 27 of the instrument body 11 while the translucent cover 13 is covered, and the translucent cover 13 is rotated in the mounting rotation direction. As a result, the tip of each claw portion 44 rides on the back side of the instrument body 11 and draws the translucent cover 13 toward the instrument body 11. At this time, the translucent cover 13 contacts the substrate 12 and presses the substrate 12 against the instrument body 11. When each claw portion 44 is caught on the back side of the instrument body 11, the instrument body 11 and the translucent cover 13 are fixed in a state where the substrate 12 is sandwiched between the instrument body 11 and the translucent cover 13.

  Screws are fixed by screwing into the mounting holes 28 of the instrument body 11 through the screw insertion holes 46 of the translucent cover 13, and the translucent cover 13 is restricted from rotating in the direction of removal and rotation opposite to the mounting rotation direction. To do.

  The shade 14 is placed on the instrument body 11 so as to cover the substrate 12, the translucent cover 13 and the like, and is rotated in a predetermined mounting rotation direction, so that the shade 14 is attached to the shade mounting bracket 31.

  Note that the assembly order of the lighting fixtures 10 is not limited to such an order.

  In order to install the luminaire 10, the adapter guide 17 of the luminaire 10 with the shade 14 removed in advance is attached to the adapter mounted on the ceiling ceiling ceiling. The wiring led out from the adapter is connected to the lighting circuit 18 side, and the hooking ceiling and the lighting circuit 18 are electrically connected. Attach the shade 14 to the instrument body 11.

  Then, when the commercial AC power is supplied to the lighting circuit 18, the lighting power is supplied from the lighting circuit 18 to the plurality of LED elements 35, and the plurality of LED elements 35 are lit.

  Light generated by the plurality of LED elements 35 is controlled in light distribution by the light distribution control body 41 of the translucent cover 13 and enters the shade 14, passes through the shade 14, and is irradiated to the illumination space.

  Further, the brightness sensor 63 detects the brightness of the illumination space in which the luminaire 10 is installed, and the lighting circuit 18 automatically adjusts the output of the LED element 35.

  Further, the heat generated by the LED element 35 is conducted from the substrate 12 to the instrument body 11, and is efficiently radiated from the instrument body 11. On the other hand, the heat generated by the lighting circuit 18 is transmitted to the case 16 and efficiently radiated from the case 16. Therefore, the heat generated by the LED element 35 and the heat generated by the lighting circuit 18 are unlikely to interfere with each other, and the heat generated by each can be efficiently radiated.

  In the lighting fixture 10 configured as described above, as shown in FIG. 1 (a), the central portion 14a of the shade 14 facing the center of the fixture main body 11 is formed from the LED elements 35 on the circumference of the protrusions 21. An imaginary line 48, which is a tangent line extending in contact with the peripheral portion, is disposed at a position farther from the instrument body 11 side than the position of the intersection P at the center side of the instrument body 11.

  If the central portion 14a of the shade 14 is closer to the instrument body 11 than the position of the intersection point P, the shadow from which the light from the LED element 35 is blocked by the protruding portion 21 appears on the central portion 14a of the shade 14. The central portion 14a of the shade 14 becomes dark.

  Since the central portion 14a of the shade 14 is arranged at a position away from the instrument main body 11 side from the position of the intersection P, it is possible to prevent a shadow from appearing on the shade 14, and the brightness of the entire shade 14 can be made uniform.

  FIG. 1 (a) shows the lighting fixture 10 in which the distance between the ceiling surface and the LED element 35 is large and the protruding amount of the protruding portion 21 from the lower surface of the fixture body 11 is small. In b), the lighting fixture 10 in which the distance between the ceiling surface and the LED element 35 is narrow and the protruding amount of the protruding portion 21 from the lower surface of the fixture body 11 is large is shown. Also in the case of the lighting fixture 10 shown in FIG. 1B, the shadow 14 is reflected on the shade 14 because the central portion 14a of the shade 14 is arranged at a position away from the appliance main body 11 side from the position of the intersection P. The brightness of the entire shade 14 can be made uniform.

  Further, when the LED elements 35 are arranged in a plurality of concentric circles, a shade can be obtained by using the intersection point P of the virtual line 48 in contact with the peripheral portion of the protruding portion 21 from the LED element 35 in the innermost circumferential row as a reference. It is possible to prevent shadows from appearing on the 14, and the brightness of the entire shade 14 can be made uniform.

  The light distribution control body 41 is formed in an axially symmetric cross-sectional shape with the reference axis 43 as the center and the outer side direction opposite to the central side direction of the instrument body 11, and the reference axis 43 emits light from the LED element 35. It is located on the outer side of the instrument body 11 from the center 35a of the part. A light distribution diagram by the light distribution control body 41 is shown in FIG. In FIG. 4, 0 ° is the downward direction, the plus angle side is the central side direction of the instrument body 11, and the minus angle side is the outside direction of the instrument body 11.

  As can be seen from FIG. 4, the luminous intensity is greater in the central direction of the instrument body 11 than in the outer direction. This is because the light emitting part of the LED element 35 is close to the inner peripheral side of the light distribution control body 41, so that the light emitted from the inner peripheral side of the light distribution control body 41 is larger than the light emitted from the outer peripheral side. . Since there is a projecting portion 21 that is provided with a mounting structure to the hook ceiling and accommodates the lighting circuit 18 in the center of the instrument body 11, the LED element 35 disposed around the projecting portion 21 and the central portion 14a of the shade 14 However, by having such a light distribution characteristic, the central portion 14a of the shade 14 can be brightened, and the brightness of the entire shade 14 can be made uniform.

  In addition, the peak of the light distribution by the light distribution control body 41 toward the central side of the instrument main body 11 coincides with the intersection point P described above. Therefore, the central portion 14a of the shade 14 can be brightened, and the brightness of the entire shade 14 can be made uniform.

  In addition, since a light diffusion surface is formed on at least one of the entrance surface 41a and the exit surface 41b on the outer peripheral side of the reference axis 43 of the light distribution control body 41, luminance unevenness around the shade 14 is reduced. The brightness of the entire shade 14 can be made uniform.

  Further, the diffusion characteristics of the light diffusing surface are formed so that the diffusivity gradually increases from the central direction of the instrument body 11 toward the outer side. In addition, among the light distribution control bodies 41 in a plurality of concentric circles, the light distribution control body 41 on the outer peripheral side is formed so that the diffusion degree of the light diffusion surface is larger than the light distribution control body 41 on the inner peripheral side. Has been. Thereby, the presence / absence boundary of the diffusion characteristic is not conspicuous, and the brightness of the entire shade 14 can be made uniform.

  In addition, a lighting fixture is applicable not only to a circular ceiling light but to a square or polygonal lighting fixture.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

10 Lighting equipment
11 Instrument body
14 Sade
14a Center part
21 Protrusion
35 LED elements as semiconductor light-emitting elements
35a center
41 Light distribution controller
43 Reference axis
48 Virtual line P Intersection

Claims (3)

An instrument body having a protrusion protruding from the center of one surface;
A semiconductor light emitting element disposed along a circumferential direction on one surface of the instrument body around the protrusion;
The central part that covers one side of the instrument body and that faces the center of the instrument body is located at the intersection point where the virtual line that contacts the periphery of the protrusion from the semiconductor light emitting element on the circumference intersects the center side of the instrument body. A shade placed at a position away from the main body side;
The lighting fixture characterized by comprising. The semiconductor light emitting elements are arranged in multiple rows concentrically on one surface of the instrument body around the protrusion,
The illuminating device according to claim 1, wherein the imaginary line is an imaginary line in contact with a peripheral portion of the protruding portion from the innermost semiconductor light emitting element. The light emitting unit has a light distribution control body that controls the light distribution facing the semiconductor light emitting element,
The light distribution control body is formed symmetrically about the reference axis in the outer direction opposite to the center side direction of the instrument body, and the reference axis is positioned outward from the center of the semiconductor light emitting element. The lighting fixture according to claim 1 or 2, characterized by the above.

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