JP2018041747A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting fixture capable of improving the uniformity of irradiation light.SOLUTION: The present invention relates to the lighting fixture comprising: an annular substrate 21 on which light emitting elements 22 as a plurality of main light sources and a light emitting element 22a for all-night light are mounted; a lighting device 4 for controlling lighting of the light emitting elements 22; and a diffusion member 3 integrally forming a diffusion part disposed to face the light emitting elements 22 as the main light sources, a flat part 33 formed in the width direction of the diffusion portion, a convex part formed continuously from the flat part 33 and disposed to face the electrical connection portion between the substrate 21 and the lighting device 4, and a convex part disposed to face the light emitting element 22a for all-night light, and covering the entire surface of the substrate 21 from the front surface side.SELECTED DRAWING: Figure 3

Description

  Embodiments described herein relate generally to a lighting fixture using a light emitting element such as an LED as a light source.

  In general residential lighting fixtures, an annular fluorescent lamp is used as a main light source, and a cover member (sade) is provided so as to cover the lower side of the annular fluorescent lamp, and the external shape is configured in a round shape. It is popular.

  On the other hand, recently, with the increase in output, efficiency, and widespread use of light emitting elements such as LEDs, lighting fixtures that can be expected to have a long lifetime using light emitting elements as light sources have been developed. To configure a lighting fixture in the same manner as a conventional lighting fixture using an annular fluorescent lamp using a light emitting element as a light source, for example, a mounting portion to a hanging ceiling body installed on a ceiling surface It is necessary to arrange a plurality of light emitting elements around the light source and to irradiate light emitted from these light emitting elements in a predetermined range in the direct downward direction.

  When a plurality of light emitting elements are arranged around the mounting portion as a light source in this way, it can be configured in a manner similar to the case where a conventional annular fluorescent lamp is used, and a long life and thinning can be expected. A lighting fixture can be realized.

Sharp / LED Ceiling Light [Search January 6, 2011] (http://www.sharp.co.jp/corporate/news/100819-a-2.html)

  However, when a light emitting element such as an LED is used as the light source, the light emitting element has high directivity of emitted light and high luminance, so that the graininess is noticeable, the luminance is difficult to be uniformed, and the uniformity of the irradiated light is reduced. Problems arise.

  This invention is made | formed in view of the said subject, and it aims at providing the lighting fixture which can aim at the improvement of the uniformity of irradiated light.

  A lighting fixture according to an embodiment of the present invention includes an annular substrate on which a light emitting element as a plurality of main light sources and a light emitting element for a nightlight are mounted; a lighting device that controls lighting of the light emitting elements; and light emission as the main light source A diffusion portion disposed opposite to the element, a flat portion formed in the width direction of the diffusion portion, and formed continuously from the flat portion, and opposed to an electrical connection portion between the substrate and the lighting device And a diffusing member that integrally forms a convex portion disposed opposite to the light emitting element for nightlight and covers the entire surface of the substrate from the front side. ing.

  According to the embodiment of the present invention, it is possible to provide a lighting apparatus capable of improving the uniformity of irradiation light.

It is a perspective view which shows the lighting fixture which concerns on embodiment of this invention. It is a disassembled perspective view which shows the same lighting fixture. FIG. 3 is a schematic plan view showing the lighting apparatus viewed from below with the cover member and the lighting device cover removed. It is sectional drawing which shows the same lighting fixture. It is an enlarged view which shows the A section in FIG. It is a top view which takes out and shows one board | substrate in the lighting fixture. FIG. 3 is a cross-sectional view showing a partially enlarged view in a state where a light source unit and a diffusing member are combined in the lighting fixture.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 7. In each drawing, the wiring connection relationship using lead wires or the like may be omitted. In addition, the same code | symbol is attached | subjected to the same part and the overlapping description is abbreviate | omitted.

  The lighting apparatus of the present embodiment is for a general house that is used by being attached to a hanging sealing body as a wiring apparatus installed on the apparatus mounting surface, and has a plurality of light emitting elements mounted on a substrate. The room is illuminated by light emitted from the section.

  1 to 4, the lighting fixture includes a main body 1, a light source 2, a diffusion member 3, a lighting device 4, a lighting device cover 5, a mounting portion 6, and a cover member 7. Moreover, the adapter A electrically and mechanically connected to the hooking sealing body Cb installed in the ceiling surface C as an instrument mounting surface is provided. Such a lighting fixture is formed in a round and circular appearance, and the front side is a light irradiation surface and the back side is a mounting surface to the ceiling surface C.

  As shown in FIGS. 2 to 5, the main body 1 is a chassis formed in a circular shape from a flat plate of a metal material such as a cold-rolled steel plate, and is provided with a mounting portion 6 to be described later at a substantially central portion. The circular opening 11 is formed. Further, on the outer peripheral side of the flat portion 12 on the inner surface side to which the light source unit 2 is attached, a stepped portion 13 is formed toward the back side, and a bowl-shaped concave portion 14 is formed. Further, an elastic member 15 is provided on the back side of the main body 1.

  The light source unit 2 includes a substrate 21 and a plurality of light emitting elements 22 mounted on the substrate 21 as described with reference to FIG. 6 (illustration of the light emitting elements 22 is omitted in FIG. 2). doing). The substrate 21 is disposed so that four arc-shaped substrates 21 having a predetermined width dimension are connected to each other, and is formed in a substantially circle shape as a whole. That is, the substrate 21 formed in a substantially circle shape as a whole is composed of four divided substrates 21.

  By using the substrate 21 thus divided, it is possible to suppress the deformation of the substrate 21 by absorbing thermal contraction at the divided portion of the substrate 21. In addition, although it is preferable to use the board | substrate 21 divided | segmented into plurality, you may make it use the board | substrate of 1 sheet integrally formed in the substantially circle shape.

  The board | substrate 21 consists of a flat plate of the glass epoxy resin (FR-4) which is an insulating material, and the wiring pattern is formed with the copper foil on the surface side. Further, a white resist layer acting as a reflective layer is applied on the wiring pattern, that is, on the surface of the substrate 21. The material of the substrate 21 can be a ceramic material or a synthetic resin material when an insulating material is used. Furthermore, when it is made of metal, a metal base substrate in which an insulating layer is laminated on one surface of a base plate having good thermal conductivity such as aluminum and excellent heat dissipation can be applied.

  The light emitting element 22 is an LED, which is a surface mount type LED package. A plurality of LED packages are arranged along the circumferential direction of a plurality of circle-shaped substrates 21, that is, in a plurality of rows on a substantially circumference centered on the mounting portion 6, and in this embodiment, two rows on the inner and outer peripheral sides Has been implemented. In addition, the LED package uses a light white color and a light bulb color, which are alternately arranged, and the adjacent light emitting elements 22 in each row are spaced at substantially equal intervals. It is arranged. Color adjustment is possible by adjusting the current flowing through the LED package of daylight white color and bulb color.

  In addition, the light emitting element 22a for nightlights is mounted on the specific board | substrate 21 (right side in FIG. 3). For this light emitting element 22a, the same LED package as that of the light bulb color in the main light source mounted in a circle shape is used. Thereby, the common use of the member is achieved.

  The light emitting elements 22 are not necessarily mounted in a plurality of rows. For example, you may make it mount in 1 row along the circumferential direction. The number of columns and the number of the light emitting elements 22 can be appropriately set according to a desired output.

  The LED package is roughly composed of an LED chip disposed in a main body formed of ceramics or synthetic resin, and a translucent resin for molding such as epoxy resin or silicone resin that seals the LED chip. It is configured. The LED chip is a blue LED chip that emits blue light. The translucent resin is mixed with a phosphor so that daylight white or light bulb color light can be emitted.

  In addition, LED may be made to mount an LED chip directly on the board | substrate 21, and you may make it mount a bullet-type LED, and a mounting system and a format are not exceptionally limited.

  The diffusing member 3 is a lens member, and is made of, for example, a transparent synthetic resin having an insulating property such as polycarbonate or acrylic resin as described with reference to FIG. 7, and has reinforced insulating performance. The light emitting elements 22 are integrally formed in a substantially circular shape along the arrangement of the light emitting elements 22, and are disposed so as to cover the entire surface of the substrate 21 including the light emitting elements 22.

Further, as representatively shown in FIGS. 5 and 7, the lens member has two chevron shapes in the circumferential direction facing the light emitting element 22 on the inner and outer portions of a substantially circle shape. Thus, the protrusion 31 having a constant cross-sectional shape is continuously formed. A U-shaped groove 32 is continuously formed along the circumferential direction inside the protruding portion 31. Therefore, the U-shaped groove 32 is arranged to face the plurality of light-emitting elements 22, and the plurality of light-emitting elements 22 are accommodated and covered in the U-shaped groove 32. It is in a state.

  Further, a flat portion 33 extending in the width direction is formed from the protruding portions 31 so that the entire surface of the substrate 21 is covered.

  According to the lens member configured in this way, as shown in FIG. 5, the light emitted from the plurality of light emitting elements 22 is diffused mainly by the protrusions 31 in the inner circumferential direction and the outer circumferential direction on the circumference. Is emitted. That is, the light emitted from the light emitting element 22 is mainly diffused and emitted in the radial direction with the circle-shaped center where the light emitting element 22 is disposed as the origin.

  Therefore, it is possible to improve the uniformity of the irradiation light by the light emitted from the plurality of light emitting elements 22 by the lens member. Further, the graininess due to the luminance of each light emitting element 22 can be suppressed. In this case, it is desirable to set the light distribution angle by diffusion to about 120 to 160 degrees.

  Moreover, since the flat part 33 is formed in the diffusing member 3 so as to cover the entire surface of the substrate 21, the charging part is covered and protected by the diffusing member 3 having reinforced insulation performance.

  Note that the diffusing member 3 may not be integrally formed in a substantially circle shape. For example, corresponding to the divided substrates 21, the substrates 21 may be divided and formed. In this case, the plurality of light emitting elements 22 mounted on one substrate 21 are continuously covered with the diffusing member 3.

  Further, the diffusion member 3 is not limited to a lens member, and a diffusion sheet or the like may be applied.

  In the light source unit 2 configured as described above, as representatively shown in FIGS. 4 and 5, the substrate 21 is positioned around the mounting unit 6, and the mounting surface of the light emitting element 22 is the front side, that is, It is arranged so as to face the lower irradiation direction. Further, the substrate 21 is attached in surface contact so that the back surface side of the substrate 21 is in close contact with the flat portion 12 on the inner surface side of the main body 1. Specifically, the diffusing member 3 is overlapped from the front side of the substrate 21, and the diffusing member 3 is attached to the main body 1 by a fixing means such as a screw S, so that the substrate 21 is connected to the main body 1 and the diffusing member 3. It is sandwiched between and pressed and fixed. That is, the substrate 21 and the diffusing member 3 are fastened together by one screw S.

Accordingly, the substrate 21 is thermally coupled to the main body 1 so that heat from the substrate 21 is conducted from the back surface side to the main body 1 and radiated. The surface contact between the substrate 21 and the main body 1 is not limited to the case where the entire surface of the substrate 21 is in contact with the main body 1. It may be a partial surface contact.

  In addition, since the flat portion 33 of the diffusion member 3 is in surface contact with the mounting surface side of the substrate 21, heat is transmitted from the mounting surface side of the substrate 21 to the diffusion member 3 and passes through the diffusion member 3. Heat can be dissipated. That is, heat can be radiated from the front side of the substrate 21.

  As shown in FIGS. 2 to 4, the lighting device 4 includes a circuit board 41 and circuit components 42 such as a control IC, a transformer, and a capacitor mounted on the circuit board 41. The circuit board 41 is formed in a substantially arc shape so as to surround the periphery of the mounting portion 6, and is electrically connected to the adapter A side and connected to a commercial AC power source via the adapter A. Accordingly, the lighting device 4 receives this AC power supply, generates a DC output, supplies the DC output to the light emitting element 22 via the lead wire, and controls the light emitting element 22 to be turned on.

  Such a lighting device 4 is disposed between the attachment portion 6 and the light source portion 2, that is, the substrate 21.

  As shown in FIGS. 2 and 4, the lighting device cover 5 is formed in a substantially short cylindrical shape by a metal material such as a cold-rolled steel plate and is attached to the main body 1 so as to cover the lighting device 4. The side wall 51 is inclined so as to expand toward the back side, and an opening 53 is formed in the front wall 52 so as to correspond to the attachment portion 6. Therefore, a part of the light emitted from the light emitting element 22 is reflected to the front side by the side wall 51 and effectively used. In addition, an arcuate guide recess 54 that is recessed toward the back surface is formed at the periphery of the opening 53.

  The attachment portion 6 is an adapter guide formed in a substantially cylindrical shape, and an engagement port 61 through which the adapter A is inserted and engaged is provided at the center portion of the adapter guide. The adapter guide is disposed corresponding to the opening 11 formed in the central portion of the main body 1. A base is formed on the outer periphery of the adapter guide so as to protrude from the outer periphery, and an electrical auxiliary component 62 such as an infrared remote control signal receiver or an illuminance sensor is disposed on the base. .

  Note that the attachment portion 6 is not necessarily a member referred to as an adapter guide or the like. For example, it may be an opening formed in the main body 1 or the like, and in essence, it means a member or a part that is opposed to the hooking sealing body Cb as a wiring device and to which the adapter A is engaged.

  The cover member 7 is formed in a substantially circular shape from a translucent material such as an acrylic resin, and has a milky white diffusibility, and has a non-translucent circular decorative cover 71 in the center. Is installed. The decorative cover 71 is formed with a light receiving window 72 having a substantially triangular translucency so as to face the electrical auxiliary component 62. Further, a projecting pin 73 projecting in the inner surface direction is formed near the center of the cover member 7 on the inner surface side.

  The cover member 7 is detachably attached to the outer peripheral edge of the main body 1 so as to cover the front side of the main body 1 including the light source section 2. Specifically, by rotating the cover member 7, a cover mounting bracket (not shown) provided on the cover member 7 is engaged with a cover receiving bracket 75 disposed in the recess 14 on the outer peripheral edge of the main body 1. Can be installed.

  Thus, in a state where the cover member 7 is attached to the main body 1, as shown mainly in FIG. 4, the inner surface side of the cover member 7 comes into surface contact with the front wall 52 of the lighting device cover 5. Therefore, heat generated from the lighting device 4 or the like can be conducted to the lighting device cover 5 and further conducted to the cover member 7 to promote heat dissipation.

  The distance between the diffusion member 3 and the cover member 7 is set to 20 to 60 mm, preferably 30 to 50 mm. Thereby, the uniformity of the irradiated light becomes good, and the heat conducted from the mounting surface side of the substrate 21 to the diffusion member 3 is effectively radiated through the cover member 7.

  Here, the cover member 7 is rotated and attached to the main body 1. However, it is necessary to align the position of the light receiving window 72 so as to face the electrical auxiliary component 62. For this reason, in this embodiment, although detailed description is abbreviate | omitted, the position control means is comprised by the protrusion pin 73 formed in the cover member 7 side, and the guide recessed part 54 formed in the lighting device cover 5. FIG. . By this position restricting means, the light receiving window 72 is positioned to face the electrical auxiliary component 62, and for example, the infrared remote control signal receiving unit can receive a control signal from the infrared remote control transmitter.

  The adapter A is electrically and mechanically connected to a hooking sealing body Cb installed on the ceiling surface C by a hooking blade provided on the upper surface side, and has a substantially cylindrical shape. Is provided so that it always protrudes to the outer peripheral side by a built-in spring. The locking portion A1 is immersed by operating a lever provided on the lower surface side.

  Further, a power cord for connecting to the lighting device 4 is led out from the adapter A, and is connected to the lighting device 4 via a connector (see FIG. 3).

  Next, the attachment state to the ceiling surface C of a lighting fixture is demonstrated with reference to FIG. First, the adapter A is electrically and mechanically connected to the hanging sealing body Cb installed on the ceiling surface C in advance. From this state, the fitting body 6 is pushed up by hand from below until the engaging portion 61 of the adapter A is securely engaged with the engaging port 61 of the adapter guide while the engaging portion 61 of the adapter guide as the mounting portion 6 is aligned with the adapter A. To install. Then, the cover member 7 is attached to the main body 1. This attachment completion state is the state shown in FIG. 4, and at this time, the elastic member 15 is interposed in close contact between the ceiling surface C and the back side of the main body 1, and the lighting fixture is fixed to the ceiling surface C. Become.

  Further, when removing the luminaire, it can be removed by removing the cover member 7 and operating the lever provided on the adapter A to disengage the engaging portion A1 of the adapter A.

  When power is supplied to the lighting device 4 in a state where the lighting fixture is attached to the ceiling surface C, the light emitting elements 22 are energized through the substrate 21 and the light emitting elements 22 are turned on. The light emitted from the light emitting element 22 is diffused in the radial direction by the diffusion member 3 that continuously covers the plurality of light emitting elements 22 and is emitted to the front side. The light radiated to the front side is transmitted through the cover member 7 and irradiated outward. Therefore, it is possible to improve the uniformity of the irradiated light and to suppress the graininess due to the brightness of each light emitting element 22.

  Further, a part of the light traveling toward the inner peripheral side in the radial direction is reflected to the front side by the inclined side wall 51 in the lighting device cover 5 and is effectively used.

  On the other hand, the heat generated from the light emitting element 22 is effectively conducted to the main body 1 and is dissipated over a wide area because the back side of the substrate 21 is in surface contact with the main body 1. Further, since the step portion 13 is formed in the vicinity of the outer peripheral side of the substrate 21 along the outer periphery of the substrate 21, the heat radiation area can be increased by the step portion 13, and the heat dissipation effect at the outer peripheral portion of the main body 1. Can be increased. In addition, the step portion 13 can provide a reinforcing effect of the main body 1.

  In addition, since the lighting device 4 is disposed between the mounting portion 6 and the substrate 21, the lighting device 4 is reduced from being thermally affected by the substrate 21. This is because the heat of the substrate 21 is conducted toward the outer peripheral direction of the main body 1 and tends to be radiated.

  Further, since the cover member 7 comes into surface contact with the lighting device cover 5, heat generated from the lighting device 4 is conducted to the lighting device cover 5 and further conducted to the cover member 7 for heat dissipation. Can do.

  In addition, since the flat portion 33 of the diffusing member 3 is in surface contact with the mounting surface side of the substrate 21, heat can be radiated from the mounting surface side of the substrate 21 through the diffusing member 3 and also from the front surface side. Become. Further, in this case, since the diffusing member 3 covers the entire surface of the substrate 21, the charging unit is protected.

  As described above, according to the present embodiment, it is possible to provide a lighting fixture capable of improving the uniformity of irradiated light.

  The present invention is not limited to the configuration of each of the embodiments described above, and various modifications can be made without departing from the spirit of the invention. For example, a solid light emitting element such as an LED or an organic EL can be applied as the light emitting element. In this case, the number of light emitting elements is not particularly limited.

DESCRIPTION OF SYMBOLS 1 ... Main body, 2 ... Light source part, 3 ... Diffusing member (lens member), 4 ... Lighting apparatus, 5 ... Lighting apparatus cover, 6 ... Mounting part (adapter guide), DESCRIPTION OF SYMBOLS 7 ... Cover member, 13 ... Step part, 21 ... Board | substrate, 22 ... Light emitting element (LED), 31 ... Projection part, 33 ... Flat part, A ... Adapter , C ... fixture mounting surface (ceiling surface), Cb ... wiring fixture (hanging ceiling body)

Claims (1)

An annular substrate on which a light emitting element as a plurality of main light sources and a light emitting element for night light are mounted; a lighting device for controlling lighting of the light emitting element;
A diffusion portion disposed to face the light emitting element as the main light source, a flat portion formed in the width direction of the diffusion portion, and formed continuously from the flat portion, and the substrate and the lighting device Diffusion that covers the entire surface of the substrate from the front side by integrally forming a convex portion disposed opposite to the electrical connection portion and a convex portion disposed opposite to the light emitting element for the night light With members;
The lighting fixture characterized by comprising.

Images