JP2014067595A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting fixture having high emission efficiency of light to the whole surface side of a translucent cover to make the surface of the translucent cover uniformly shine.SOLUTION: A lighting fixture 10 is provided with a fixture body 11. A substrate 12 on which a semiconductor light-emitting element is mounted, a light distribution control body 41 and a translucent cover 14 are fitted to the lower surface side of the fixture body 11. A frame body 15 and a circuit case 16 are fitted to the upper surface side of the fixture body 11. An adaptor guide 17 as a fixture attaching part, a lighting circuit 18 and the like are fitted to the circuit case 16. A surface having surface-scattering characteristics and formed on the light distribution control body 41 is shaped so as to obtain scattering characteristics in a range of 60° to 80° .

Description

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

  Conventionally, in a lighting fixture such as a ceiling light, for example, a plurality of LED light emitting 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.

  By the way, the LED light emitting element has strong directivity in the light emitting direction, and the brightness of the translucent cover facing the LED light emitting element is uneven.

  In view of this, it is known to provide a diffusing portion for diffusing light in a portion of the translucent cover facing the LED light emitting element, or to provide a lens for controlling light.

JP 2011-134684 A

  However, if a diffusing portion for diffusing light is provided in the portion of the transparent cover facing the LED light emitting element, there is a problem that the efficiency of light toward the entire surface of the translucent cover is reduced. Further, in the case of a lens, the manufacturing becomes complicated and expensive, and it is difficult to take a position system with the LED light emitting element.

  The problem to be solved by the present invention is to provide a luminaire that has high light emission efficiency toward the entire surface side of the translucent cover and can uniformly illuminate the translucent cover surface.

  A lighting fixture according to an embodiment includes a main body having a mounting portion attached to a wiring fixture installed on a fixture mounting surface; a semiconductor light-emitting element disposed along a circumferential direction on one surface of the fixture main body; and lighting the semiconductor light-emitting element A lighting device to be provided; a light distribution control member that continuously covers a plurality of semiconductor light emitting elements, has a protrusion that faces the semiconductor light emitting element, and has surface scattering characteristics at a part of the protrusion And a translucent cover that covers the semiconductor light-emitting element and is attached to the apparatus body.

  According to the present invention, the entire surface of the translucent cover can emit light uniformly.

It is sectional drawing which shows the lighting fixture from which the protrusion height of the protrusion part from the fixture main body which is 1st embodiment differs. It is a perspective view of the decomposition | disassembly state of a lighting fixture same as the above. Sectional drawing which shows an instrument main body, a light distribution control body, and a translucent control body. The graph which shows the transmission efficiency when light injects into the surface scattering characteristic surface 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, the first 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, and a substrate 12, on which a semiconductor light emitting element is mounted, a light distribution control body 41, and a translucent cover 14 are attached to the lower surface side of the fixture main body 11. The frame 15 and the circuit case 16 are attached to the frame. An adapter guide 17 and a lighting circuit 18 are attached to the circuit case 16 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 in a central region surrounded by the protruding portion 21, a window hole 26 is formed in a side portion of the opening 25, and a peripheral portion is long in the circumferential direction as a mounted portion. A plurality of long hole-like claw insertion holes 27 and one mounting hole 28 for screwing are formed.

  An annular base portion 29 for attaching the circuit case 16 is formed on the board 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 translucent cover mounting brackets 31 are attached to the recess 24 to removably attach the translucent cover 14 by rotating the translucent cover 14 with respect to the instrument body 11. The translucent cover mounting bracket 31 is accommodated in the recess 24 without protruding from the substrate placement portion 22.

  Further, the substrate 12 on which the semiconductor light emitting element is mounted 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 light distribution control body 41 is made of a transparent resin having a light transmitting property and a light guiding property, for example, a transparent synthetic resin having an insulating property such as a polycarbonate or an acrylic resin, and has a reinforced insulating property. An opening 39 is formed in an annular shape at the center. The light distribution control body 41 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 has an annular light distribution control body 41 as a light distribution control member that controls the light distribution of the light emitted from the LED elements 35 so as to face the LED elements 35 arranged in two rows on a concentric circle. Two rows are formed on concentric circles.

  As shown in FIG. 3, the light distribution control body 41 is formed in a mountain shape having a concave portion that accommodates the LED element 35, has an incident surface that faces the concave portion and receives light from the LED element 35, and is formed on the outer surface. An exit surface for emitting the light incident on the light distribution control body 41 is formed.

  The light distribution control body 41 is formed in a cross-sectional shape that is substantially axisymmetric about the reference axis 43 in the outer direction opposite to the central side direction of the instrument body 11, and the reference axis 43 is a light emitting part of the LED element 35. Located in the center 35a.

  In addition, a surface scattering characteristic surface 42 as a surface scattering characteristic region is formed on at least one of the incident surface and the emission surface on the inner peripheral side from the reference axis 43 of the light distribution control body 41 by, for example, an uneven pattern. Further, the diffusion characteristic due to the surface scattering characteristic surface 42 is formed so that the diffusion degree gradually increases toward the central side of the instrument body 11.

  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 light distribution control body 41 on the inner peripheral side and the outer peripheral side. ing. 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 light distribution control body 41. Then, by inserting each nail 44 into each nail insertion hole 27 of the instrument body 11 and rotating the light distribution control body 41 in the mounting rotation direction, the tip of each nail 44 is on the back side of the instrument body 11 The light distribution control body 41 is pulled toward the instrument main body 11 and the claws 44 are caught on the back side of the instrument main body 11 to sandwich the substrate 12 between the instrument main body 11 and the light distribution control body 41. In this state, the instrument body 11 and the light distribution control body 41 are fixed.

  A screw insertion hole 46 is provided at one place on the inner periphery of the light distribution control body 41. By screwing the screw into the mounting hole 28 of the instrument main body 11 through the screw insertion hole 46, the light distribution control body 41 is restricted from rotating in the removal rotation direction opposite to the mounting rotation direction.

  Further, the translucent cover 14 is made of translucent milky white resin, the upper surface side is opened, and an attachment step portion to be attached to each translucent cover mounting bracket 31 is formed on the inner peripheral edge portion on the upper surface side. Yes. The translucent cover 14 attached to the instrument main body 11 covers the lower surface of the instrument main body 11, the substrate 12, the light distribution control body 41, and the like.

  As shown in FIG. 2, the frame 15 is made of a translucent resin 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 circuit 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 body 11. In the circuit case 16, an accommodation space 54 is formed between the upper surface of the instrument body 11 to accommodate and attach the adapter guide 17 and the lighting circuit 18. On the upper surface of the circuit case 16, when the lighting device 10 is installed on the ceiling surface, the lighting device 10 is compressed between the ceiling surface to prevent rattling of the lighting device 10 and to prevent the lighting device 10 from rotating. The 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 has a circuit board 62 arranged around the adapter guide 17 and fixed to the circuit case 16 side, and various electronic components constituting the lighting circuit 18 are mounted on the circuit board 62. ing. 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 circuit 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 light distribution control body 41 are inserted into the claw insertion holes 27 of the instrument body 11 while covering the light distribution control body 41, and the light distribution control body 41 is mounted in the mounting rotation direction. By rotating, the tip of each claw portion 44 rides on the back side of the instrument body 11 and draws the light distribution control body 41 toward the instrument body 11. At this time, the light distribution control body 41 contacts the substrate 12 and presses the substrate 12 against the instrument body 11. When each claw 44 is caught on the back side of the instrument body 11, the instrument body 11 and the light distribution controller 41 are fixed in a state where the substrate 12 is sandwiched between the instrument body 11 and the light distribution controller 41. The

  The screw is screwed into the mounting hole 28 of the instrument body 11 through the screw insertion hole 46 of the light distribution control body 41 and fixed, and the light distribution control body 41 rotates in the removal rotation direction opposite to the mounting rotation direction. To regulate.

  The translucent cover 14 is covered with the translucent cover 14 so as to cover the substrate 12, the light distribution control body 41, and the like, and is rotated in a predetermined mounting rotation direction. Attach to 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 translucent cover 14 removed in advance is attached to the adapter attached to 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. The translucent cover 14 is attached 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 surface scattering characteristic surface 42 formed on the light distribution control body 41 of the light distribution control body 41 and directed toward the central portion 14a of the translucent cover 14. Light enters and passes through the translucent cover 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 circuit case 16 and efficiently radiated from the circuit 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.

  As shown in FIG. 3, the lighting fixture 10 configured in this way has an angle formed by the inner LED element 35 arranged in an annular shape from the center of the translucent cover 14 facing the center of the fixture body 11 at 80 degrees. It is arranged to be at °.

  FIG. 4 shows the transmission efficiency when the inner surface of the light distribution control body 41 is a flat surface and when light is incident on the surface scattering characteristic surface. Here, the transmission efficiency in the present embodiment is defined as the ratio of the amount of light transmitted through the translucent cover 14 without returning to the incident side with respect to the amount of light incident on the flat plate. As can be seen from this analysis, when the inner surface of the light distribution control body 41 is flat and the angle with the inner LED element 35 arranged in an annular shape from the center of the translucent cover 14 facing the instrument center is 80 ° It can be seen that only about 30% of the light incident on the translucent cover 14 is transmitted, and 70% is reflected or absorbed. For this reason, even if light distribution control is performed with the peak angle directed in the direction of 80 °, most of the light distribution is reflected and absorbed by the light distribution control body 41 and the effect is reduced. Therefore, light is efficiently used to improve the luminance uniformity. I can't.

  On the other hand, when the surface scattering characteristic region 42 is formed on the inner inner peripheral surface near the center of the fixture of the light distribution control body 41, if the angle between the LED element 35 and the center of the translucent cover is as large as 80 °, the light distribution The transmission efficiency that passes through the control body 41 is 50% or more, and the central region of the translucent cover 14 can be efficiently irradiated.

  When the inner surface of the light distribution control body 41 is a flat surface, the angle with the inner LED element 35 arranged in an annular shape from the center of the translucent cover 14 facing the center of the instrument body is more than 60 °. As it increases, the transmittance decreases to 60% or less. Therefore, it is effective to form the surface scattering characteristic surface formed on the light distribution control body 41 so that the diffusion characteristic is obtained in the range of 60 ° to 80 °.

  In FIG. 5, 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. 5, it can be seen that the luminous intensity is substantially constant in the direction of the center side of the instrument body 11 and the direction of the outer side. This is a region in which surface scattering characteristics are obtained on the inner peripheral side of the light distribution control body 41 of 60 ° to 80 ° with respect to the light emitting portion of the LED element 35 and the center of the translucent cover 14. This is because light emitted from the inner peripheral side of the body 41 can be efficiently emitted toward the center of the translucent cover 14. Since there is a protruding portion 21 that provides a mounting structure to the hook ceiling or accommodates the lighting circuit 18 in the center of the instrument body 11, the central portion of the translucent cover 14 from the LED element 35 disposed around the protruding portion 21 Although the distance to 14a is increased, by having such a light distribution characteristic, the central portion 14a of the translucent cover 14 can be brightened and the luminance of the entire translucent cover 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 translucent cover 14 can be brightened, and the brightness of the entire translucent cover 14 can be made uniform.

  Further, by forming a surface scattering region on at least one of the entrance surface and the exit surface on the outer peripheral side from the reference axis 43 of the light distribution control body 41, luminance unevenness in the peripheral portion of the translucent cover 14 is reduced, The brightness of the entire translucent cover 14 can be made uniform.

  Further, the surface diffusion characteristics of the light diffusing surface are formed such that the degree of diffusion gradually increases from the central side direction of the instrument body 11 toward the outer side direction. 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 luminance of the entire translucent cover 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 fixtures, 11 .... Main body, 14 .... Translucent cover, 35 ... LED elements as semiconductor light emitting elements, 41 ... Light distribution control elements, 42 ... Surface scattering characteristics region, 43 ... Reference axis,

Claims (3)

A main body having a mounting portion to be attached to a wiring device installed on the device mounting surface;
A semiconductor light emitting device disposed along a circumferential direction on one surface of the instrument body;
A lighting device for lighting the semiconductor light emitting element;
A light distribution control member that continuously covers the plurality of semiconductor light emitting elements and is formed with a protrusion facing the semiconductor light emitting element, and having a surface scattering characteristic at a part of the protrusion;
A translucent cover covering the semiconductor light emitting element and attached to the instrument body;
The lighting fixture characterized by comprising.   2. The luminaire according to claim 1, wherein the luminaire has surface scattering characteristics only in a region excluding a region perpendicular to the light emitting surface of the semiconductor light emitting element.   An angle between a virtual line connecting the center of the light emitting surface of the semiconductor light emitting element and the center of the protrusion of the light distribution control member and a virtual line perpendicular to the light emitting surface of the semiconductor light emitting element is θmax, and the protrusion of the semiconductor light emitting surface center and the light distribution control member 3. A surface scattering characteristic in a range of 60 ° <θ <θmax, wherein an angle formed by an imaginary line connecting arbitrary points of a portion with the vertical imaginary line is θ. The luminaire described.

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