Lighting fixture

Abstract

The present application aims to provide a lighting appliance whose light guide plate has excellent function and rationalized structure. The lighting appliance (1) of the present application has a main body (10), a light diffusion cover (30), a light source (50), a light guide plate (80), the light diffusion cover (30), and a mounting member (90), the light emitting elements (52) constituting the light source (50) are surface-mounted on the substrate (51) in a column, the frame (70) is provided with an LED module (73) which emits toward the side of the light guide plate (80). The light guide plate (80) extends in a substantially horizontal direction and has a decorative portion (82) which takes out the light emitted from the LED module (73) and passing through the light guide plate (80) to the outside of the light guide plate (80), the light diffusion cover (30) is milky white and is arranged on the light emitting surface side of the light guide plate (80).

Description

TECHNICAL FIELD

[0001] The present application relates to a lighting appliance provided with a light guide plate. BACKGROUND

[0002] In view of the low power consumption and long life of LEDs, a plurality of lighting appliances using LEDs have been proposed. For example, a lighting appliance provided with a light distribution control member and a light guide body is disclosed in Patent Literature 1.

[0003] PRIOR ART DOCUMENTS

[0004] PATENT LITERATURE

[0005] Patent Literature 1: Japanese Patent Application Laid-Open No. 2020-123561 SUMMARY

[0006] PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] The lighting appliance of Patent Literature 1 is intended for thinning of an appliance main body, and is provided with a light source module having one or more solid light emitting elements and a substrate that mounts the solid light emitting elements to a mounting surface, and is provided with a light guide body that guides light emitted from a light emitting surface of the solid light emitting elements to illuminate an illumination space, and a main body that supports the light source module and the light guide body. However, in the lighting appliance of Patent Literature 1, since a vertical LED light emitting element for illuminating an illumination space (living room) and a vertical LED for the light guide body are provided on the same substrate, there is a disadvantage that the structure of the lighting appliance becomes complicated, and the function of the light guide plate is insufficient.

[0008] Therefore, an object of the present application is to provide a lighting appliance in which the function of a light guide plate is excellent and the structure is rationalized.

[0009] TECHNICAL SOLUTION FOR SOLVING THE PROBLEMS

[0010] In order to achieve the object, the lighting appliance of the present application is provided with:

[0011] a main body having an opening in the center;

[0012] an adapter provided in the opening, mechanically and electrically connected to a wiring appliance;

[0013] a housing detachably coupled to a mounting member provided at a rim portion of the main body;

[0014] a light source provided in the housing and having a plurality of light emitting elements mounted to a substrate;

[0015] a flat plate-shaped light guide plate having an opening portion substantially the same shape as the light source;

[0016] a light diffusion cover covering a light exit surface side of the light source; and

[0017] a frame disposed between the light guide plate and the light diffusion cover, and disposed at the opening portion of the light guide plate,

[0018] the light emitting elements are surface-mounted on the substrate in a columnar shape,

[0019] the frame has an LED module that emits toward a side surface of the light guide plate,

[0020] the light diffusion cover is disposed on a front surface side of the frame.

[0021] Further, the light guide plate of the present application extends in a substantially horizontal direction, and has a decorative portion that takes out light emitted from the LED module and passing through the light guide plate to the outside of the light guide plate.

[0022] Effects of Invention

[0023] According to the present application, in a lighting appliance having a light emitting element such as an LED, by using a light guide plate having a decorative portion, a lighting appliance that is thin and has excellent light diffusion and visual effects and a simple structure can be obtained. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is an exploded perspective view of the lighting appliance of the embodiment.

[0025] Figure 2 (A) of FIG. 1 is a schematic side view of the lighting appliance of the embodiment, Figure 2 (B) of FIG. 1 is a schematic sectional view of the lighting appliance.

[0026] Figure 3 is a sectional view of a main portion of the vicinity of the light guide plate of the lighting appliance of the embodiment.

[0027] Figure 4A is an appearance perspective view as viewed from a floor side of the lighting appliance of the embodiment.

[0028] Figure 4B is a plan view as viewed from the floor side of the lighting appliance.

[0029] Figure 4C is a plan view showing the light guide plate, the housing, and the main body as viewed from a ceiling surface side of the lighting appliance.

[0030] Figure 5 is a plan view showing a disposition state of a mounting member in the main body of the lighting appliance of the embodiment.

[0031] Figure 6 (A) of FIG. 6 is a plan view showing a modification example of the housing of the lighting appliance of the embodiment, Figure 6(B) is a side view thereof.

[0032] REFERENCE NUMERALS

[0033] 1 lighting fixture

[0034] 2 ceiling surface

[0035] 3 wiring fixture

[0036] 10 main body

[0037] 11 flat plate portion

[0038] 13 opening

[0039] 14 convex portion

[0040] 15 wall portion

[0041] 20 power supply device

[0042] 30 light diffusion cover

[0043] 35 mounting member

[0044] 50 light source

[0045] 51 substrate

[0046] 52 light emitting element

[0047] 60 housing

[0048] 61 inner convex portion

[0049] 62 top portion

[0050] 63 bottom portion

[0051] 64 slit

[0052] 70 frame

[0053] 71 frame member

[0054] 72 bottom portion

[0055] 73 LED module

[0056] 74 opening portion

[0057] 80 light guide plate

[0058] 81 opening portion

[0059] 82 decorative portion

[0060] 83 rod

[0061] 90 mounting member

[0062] 100 adapter

[0063] 101 hooking blade

[0064] 102 claw portion

[0065] 104 hooking blade engagement hole

[0066] 110 remote controller

[0067] 111 display panel

[0068] 112 operation button DETAILED DESCRIPTION

[0069] Embodiments of the present application will be described. Furthermore, the present application is not limited to the following embodiments. In addition, in each of the following drawings, the same reference numerals are applied to the same parts. The lighting appliance and the light diffusing cover of the present application can be applied to various lighting appliances of a type of a ceiling-mounted light that is installed in a wiring appliance such as a ceiling junction box configured on a ceiling surface or a type of a pendant light that is suspended from a ceiling surface.

[0070] In a general household residence, a wiring appliance 3 called a ceiling junction box, a ceiling lamp base body, a ceiling lamp stand, a ceiling line box, or the like for installing a ceiling-mounted light or the like is installed on a ceiling surface. The lighting appliance 1 is installed on the wiring appliance 3 provided on the ceiling surface 2 of the residence via an adapter 100.

[0071] In addition, AC power is supplied from a commercial power source to the general household residence. By installing the adapter 100 for the lighting appliance 1 on the wiring appliance 3 provided on the ceiling surface 2, the wiring appliance 3 and the adapter 100 are mechanically and electrically connected, and AC power is supplied from the wiring appliance 3 to the lighting appliance 1 from the adapter 100 via a power line in the residence.

[0072] Here, the lighting appliance related to the embodiments of the present application will be described with reference to the drawings. Furthermore, the embodiments described below represent one specific example of the present application, and thus the arrangement, function, numerical value, and the like of the constituent components described in the embodiments are only one example, and the scope of the present application is not limited to the interpretation defined by them.

[0073] (Embodiments)

[0074] Hereinafter, the lighting appliance 1 related to the embodiments will be described.

[0075] Figure 1is an exploded perspective view of the lighting fixture 1 of the embodiment of the present application. As shown in the figure, the lighting fixture 1 of the embodiment is composed of a main body 10, a power supply device 20, a housing 60, a light guide plate 80, a frame 70, a light diffusion cover 30, and a light source 50. The main body 10 is a member called "chassis" and is formed in a circular shape from a flat plate of a metal material such as a cold-rolled steel sheet, with a circular opening 13 formed in the center.

[0076] An adapter 100 for mounting the lighting fixture 1 to a wiring fixture 3 disposed on a ceiling surface 2 is mounted to the opening 13 of the main body 10. In order to detachably fix the adapter 100, a circular ring-shaped mounting member 35 for fixing the adapter 100 is provided to the opening 13 of the main body 10. In addition, three mounting pieces 90 for engaging with the housing 60 are provided at regular intervals in a concentric circular shape near the wall portion 15 of the flat plate portion 11 on the main body 10. Further, the mounting pieces 90 are not limited to three, but can be four or the like, and are appropriately changed depending on the structure of the main body 10 and the housing 60.

[0077] The housing 60 is in a substantially quadrangular truncated pyramid shape, with a top portion 62 in a circular cross section and a bottom portion 63 in a substantially square cross section. Three inside protrusions 61 for detachably coupling the housing 60 and the main body 10 by fitting with the mounting pieces 90 of the main body 10 are provided at regular intervals on the inner side of the rim portion of the top portion 62 corresponding to the mounting pieces 90. The power supply device 20 is disposed between the top portion 62 of the housing 60 and the light source 50. The power supply device 20 and the light source 50 in a substantially rectangular parallelepiped shape are provided in this order from the top portion 62 side of the housing 60. On the bottom portion 63 side of the housing 60, the light guide plate 80, the frame 70, and the light diffusion cover 30 are disposed in this order. The housing 60 is fixed to the main body 10 by fitting between the mounting pieces 90 provided near the wall portion 15 of the main body 10 and the inside protrusions 61 provided on the inner side of the rim portion of the housing 60. Thus, the light source 50, the light guide plate 80, the frame 70, and the light diffusion cover 30 integrally fixed to the housing 60 are disposed on the ceiling surface 2.

[0078] In the present embodiment, the housing 60 is in a substantially quadrangular truncated pyramid shape, but the shape of the housing 60 is not limited to the substantially quadrangular truncated pyramid shape of the embodiment, and can be a circular cylinder shape, a circular truncated cone shape, a cubic shape, a rectangular parallelepiped shape, or the like. Further, in the drawings, structural elements such as wiring, screws, connectors, and the like are omitted (hereinafter, the same).

[0079] The light source 50 has a plurality of light emitting elements 52 such as LEDs mounted on a substantially quadrangular substrate 51. The substrate 51 is not limited to one flat plate, and can be a substantially quadrangular whole by joining a plurality of substrates. Also, the light source 50 is not limited to the substantially quadrangular substrate 51, and a plurality of light emitting elements can be mounted in a column or a ring on a circular substrate. The light source 50 performs surface emission as a main illuminating portion and irradiates the front surface (ground) side.

[0080] The light emitting elements 52 are surface-mounted LED packages, and a plurality of light emitting elements 52 are mounted on the substrate 51 at a prescribed interval. In the embodiment, the light emitting elements 52 are arranged in a matrix at a prescribed interval. Also, the light emitting elements 52 can use light emitting elements of a day white color and light emitting elements of a bulb color, and the light emitting elements 52 are arranged alternately in columns with the light emitting elements 52 adjacent to each other in each column arranged at a prescribed interval. By adjusting the current flowing through the light emitting elements 52 of the day white color and the bulb color, color adjustment can be performed. Also, the light emitting elements 52 can use light emitting elements 52 of a light emitting color other than the day white color and the bulb color. The number of light emitting elements 52 and the arrangement thereof can be appropriately set to be arranged in a circular ring or the like in addition to the column, depending on the desired output or the like. Also, an organic EL element can be used instead of an LED.

[0081] The light emitting elements 52 can function as a night light by dimming the light emitting elements 52 as a whole mounted on the substrate 51, but by adjusting the brightness of one or a plurality of light emitting elements 52 of the light emitting elements 52 as light emitting elements for a night light, an environment in which a person can sleep safely at night can be formed in a general household. In this case, the light emitting elements 52 are preferably of a bulb color.

[0082] The substrate 51 is a substantially quadrangular flat plate. On the surface of the substrate 51, the plurality of light emitting elements 52 mounted thereon and a power supply terminal (not shown) that receives a supply of direct current power from the power supply device 20 are arranged.

[0083] The substrate 51 is a flat plate of a glass epoxy resin (FR-4) as an insulating material, and a substrate in which a wiring pattern is formed by a silver foil on the surface side on which the light emitting elements 52 are mounted is used. In addition, the wiring pattern is not limited thereto, and can be formed on the back surface or the inside of the substrate 51. Also, on the upper portion of the wiring pattern, that is, the surface of the substrate 51, a white resist layer that functions as a reflection layer is applied. As the material of the substrate 51, in the case of using an insulating material, in addition to the glass epoxy resin (FR-4), a ceramic material, a synthetic resin material, or the like can be applied. Also, in the case where the substrate 51 is made of metal, a base substrate in which an insulating layer is laminated on one surface of a substrate having good thermal conductivity and excellent heat dissipation such as aluminum or the like can be applied.

[0084] The light diffuser 30 is configured to completely cover the light-illuminating surface of the light source 50, diffusing the linear emitted light from the light-emitting element 52 to illuminate the front surface (ground). The light diffuser 30 is made of a milky white material, and anti-glare and light-diffusing effects can also be imparted to the surface of the light diffuser 30 by providing a lens portion (not shown) opposite to the light-emitting element 52 mounted on the substrate 51. In addition, anti-glare and light-diffusing properties can also be imparted by processing the surface of the light diffuser 30 into a frosted glass-like or slit-like pattern.

[0085] The light diffuser 30 is formed of a transparent resin with light-diffusing properties, such as polycarbonate (PC), PMMA (polymethyl methacrylate), acrylic, PS (polystyrene), etc.

[0086] Alternatively, a cover member, also known as a "lampshade" (illustration omitted), can be provided to cover the surface of the light diffuser 30. The cover member can be of any shape, as long as it covers the surface of the light diffuser 30, but it must be made of a light-transmitting material. A milky-white material can also be used to impart light diffusion and anti-glare properties. Furthermore, the cover member can be made of acrylic resins such as PMMA (polymethyl methacrylate), but is not limited to these; it can also be made of synthetic resins such as polycarbonate or polystyrene. Additionally, light diffusion and anti-glare properties can be imparted by processing the surface of the cover member into a frosted glass-like or slit-like pattern.

[0087] Figure 2 (A) is a schematic side view showing the state of the lighting fixture 1 installed on the ceiling surface 2 according to the embodiment. The ceiling surface 2 and wiring fixture 3 are omitted here. The housing 60 is generally shaped like a frustum of a square pyramid, with a circular cross-section at the top 62 and a generally square cross-section at the bottom 63. The area near the bottom 63 is formed by four rectangular vertical surfaces that rise perpendicularly from the sides of the square cross-section, giving the area near the bottom 63 an overall cuboid shape. The main body 10 is detachably mounted on the top 62 of the housing 60.

[0088] In addition, Figure 2 An adapter 80 is mounted on the upper surface of the main body 10 of (A), and a pair of inverted L-shaped hook blades 101 protrude from the upper surface of the main body 80. The hook blades 101 engage with a pair of hook blade engagement holes 104 of the wiring fixture 3 disposed on the ceiling surface 2 to detachably fix the lighting fixture 1 to the wiring fixture 3. A light guide plate 80, a frame 70, and a light diffuser 30 are arranged sequentially on the bottom 63 side of the housing 60. Multiple LED modules 73 that emit illumination light toward the side of the flat light guide plate 80 are arranged in a row along the side of the frame 70. In addition, structural elements such as wiring, screws, and connectors are omitted in the drawings (hereinafter the same).

[0089] Figure 2 (B) is Figure 2 A schematic cross-sectional view of (A). The adapter 100 has a pair of claws 102 on its side. The claws 102 engage with an annular mounting member 35 disposed around the opening 13 of the body 10 and are held in place by the mounting member 35. The body 10 is thus mounted to the wiring device 3 by being held in the adapter 100.

[0090] Inside the housing 60, a box-shaped power supply unit 20, a light source 50, a light guide plate 80, a generally quadrilateral frame 70 formed by L-shaped frame members 71 supporting the light guide plate 80, and a light diffuser 30 are arranged sequentially. The light guide plate 80 has an opening 81 with a shape approximately the same as that of the light source 50. In addition, the light diffuser 30 is disposed on the light emitting surface side of the light guide 80.

[0091] Figure 3 This is a cross-sectional view of the main portion near the light guide plate 80 of the lighting fixture 1 in this embodiment. The light diffuser 30 receives emitted light from a plurality of light-emitting elements 52 mounted on a substrate 51 of a light source 50 disposed within the housing 60, illuminating the front surface (ground), and diffuses the light into the room, providing uniform surface emission with equal brightness. Furthermore, Figure 3 The arrow in the image indicates the direction of light emission.

[0092] The frame 70 is generally square in shape, with an L-shaped frame member 71 surrounding the four sides, forming an opening 74. At the bottom (the bottom part of the L-shape) 72 of the frame member 71, multiple LED modules 73 are arranged in a row along the roughly square frame member 71. Illumination light is emitted from the LED modules 73 in a generally horizontal outward direction. The row of LED modules 73 can be arranged in one row, but multiple rows are also possible. Additionally, LED modules 73 with different light colors can be arranged appropriately.

[0093] The quadrilateral opening 81 inside the light guide plate 80 is mounted on the bottom 72 of the L-shaped frame member 71 of the frame 70, which protrudes outward in a generally horizontal direction. Inside the housing 60, the light source 50, the light guide plate 80, the frame 70, and the light diffuser 30 are arranged sequentially from the two sides of the ceiling surface.

[0094] The light guide plate 80 is arranged substantially in parallel with the ceiling surface 2. The LED module 73 emits the irradiation light toward the side surface of the light guide plate 80 from the side surface of the light guide plate 80. The irradiation light incident on the light guide plate 80 passes through the inside of the light guide plate 80, reaches the decorative portion 82, and is extracted from the decorative portion 82 toward the outside of the light guide plate 80 by the light inside the light guide plate 80, whereby the irradiation light is emitted toward the outside of the decorative portion 82. As a result, the decorative portion 82 emits light brightly, and the pattern and the like of the decorative portion 82 drawn on the light guide plate 80 are presented. A part of the irradiation light inside the light guide plate 80 directly passes through the inside of the light guide plate 80 and is emitted toward the outside from the end portion of the light guide plate 80. The decorative portion 82 is constituted by, for example, a recess formed on the surface of the light guide plate 80, is a portion that changes the travel route of the irradiation light passing through the inside of the light guide plate 80 by the recess formed, and guides in a manner of being extracted toward the outside of the light guide plate 80, specifically, a character, a figure, a symbol, a drawing, a pattern in which these are combined, and the like for changing the travel route of the irradiation light.

[0095] The light guide plate 80 provided with the decorative portion 82 realizes a design effect by emitting light from the decorative portion 82, and has an effect of giving a person a sense of satisfaction, a sense of fulfillment, and the like by a visual effect. In the light source 50, the light emitting element 52 is controlled by receiving the control signal of the power supply device 20, whereby in addition to the lighting / turning-off of the extracted light irradiated from the light diffusing cover 30, dimming (changing the brightness) and color adjustment (changing the color tone) are also possible. Similarly, in the LED module 73 that emits toward the side surface of the light guide plate 80, by the control of the power supply device 20, the lighting / turning-off, dimming, and color adjustment of the light irradiated from the decorative portion 82 of the light guide plate 80 are also possible.

[0096] Further, in the embodiment, the light guide plate 80 extends in a substantially horizontal direction (a direction substantially in parallel with the floor), but can form a certain angle (horizontal angle α) with the horizontal direction. In the embodiment, the horizontal angle α of the light guide plate 80 is substantially 0°, but for example, the horizontal angle α of the light guide plate 80 can be set in a range of 0° to ±60° in a manner of being inclined to the floor side at an angle of 15°, 30°, or 45° (α = -15°, -30°, -45°) or to the ceiling surface side at an angle of 15°, 30°, or 45° (α = 15°, 30°, 45°) with respect to the horizontal plane (a plane in parallel with the floor).

[0097] Moreover, in order to improve the color rendering property of the lighting device 1, it is also possible to adopt fluctuation lighting as the lighting method of the light guide plate. The fluctuation lighting causes the luminance of the light guide plate 80 provided with the decorative portion 82 to regularly or irregularly continuously change over time between 0 and 90%, and performs dimming control of the luminance of the decorative portion 82 of the light guide plate 80. By performing such fluctuation lighting, it is possible to form a mode that improves the color rendering effect while taking the room as a relaxation space. Moreover, by performing dimming control of the mode of the fluctuation lighting in a mode of so-called 1 / f fluctuation (fluctuation in which the frequency spectrum density is inversely proportional to the frequency f, where f > 0), it is possible to improve the color rendering effect as a relaxation space. As the dimming range of the luminance of the light guide plate 80, 0 to 90% is a reference, but dimming ranges of 0 to 80%, 5 to 75%, and the like can be appropriately set by the needs of the user.

[0098] In addition, the period of the fluctuation lighting is, for example, 8 seconds as one time as a reference, but can be set in a range from 1 second to 60 seconds at 5 seconds one time, 15 seconds one time, and the like. This setting can be changed by the operation of the user, and thus it is possible to make a setting that meets the needs of the user.

[0099] In addition, for example, by attaching a color adjustment control function that causes the light color of the LED module 73 to regularly or irregularly continuously change to the power supply device 20, it is possible to perform fluctuation lighting that causes the light color of the decorative portion 82 of the light guide plate 80 to regularly or irregularly continuously change. Moreover, in the power supply device 20, in addition to the control of the fluctuation lighting related to the dimming or color adjustment of the LED module 73 described above, a control function of the fluctuation lighting related to dimming or color adjustment is attached to the light source 50, and thus it is possible to control the fluctuation lighting of the light source 50 in addition to the dimming or color adjustment control of the LED module 73. In any case, the fluctuation lighting is preferably based on 1 / f fluctuation.

[0100] In this way, by performing control of the fluctuation lighting of the LED module 73 or the light source 50, it is possible to expect an improvement in the relaxation, pacification effect of the user.

[0101] Moreover, for example, in the lighting device 1 of the embodiment, an audio device including a speaker is mounted, and by combining an auditory effect produced by an effect sound brought about by a sound of waves, a sound of river water, a sound of swaying of a branch, a call of a bird, or a specific frequency, and the control of the fluctuation lighting of the LED module 73 or the light source 50, it is possible to further improve the effect of relaxation, pacification, and the like.

[0102] In addition, around the power supply device 20 between the main body 10 and the light source 50 arranged in the housing 60, in addition to the audio device including a speaker, it is also possible to arrange a germ and odor removing machine using a photocatalyst, an earthquake alarm device provided with a sensor that detects an earthquake, a wireless LAN repeater for Internet connection of a portable telephone, a computer, and the like.

[0103] By controlling both of the light generating sources of the light source 50 and the LED module 73, it is possible to perform (1) only the decorative portion 82 of the light guide plate 80 is lit by lighting the LED module 73 in a state where the light source 50 is turned off, (2) only the light source 50 is lit, (3) both of the light source 50 and the decorative portion 82 are lit at the same time, and the like. Furthermore, by dimming and color adjusting the two light generating sources of the light source 50 and the LED module 73 respectively, it is possible to perform various combinations of light, and it is possible to set the lighting to the favorite of each person.

[0104] Furthermore, by lighting / turning off the plurality of LED modules 73 arranged in a column along the frame member 71 assembled in a substantially square shape in order, it is possible to light in a manner that the light emitted from the LED module 73 flows, and it is possible to expect an improvement in color rendering effect and the like. In addition, it is also possible to increase variations in lighting by lighting / turning off, dimming, and color adjusting the LED modules 73 arranged along each side of the frame member 71 for each side of the substantially quadrangular shape, respectively.

[0105] Figure 4A is an appearance perspective view of the lighting appliance 1 of the embodiment as viewed from the floor side. In the lighting appliance 1 provided to the ceiling surface 2, the decorative portion 82 composed of the line, circle, quadrangle, diamond, and the like drawn on the light guide plate 80 is brightly lit when the LED module 73 is lit. The lighting state of this lighting appliance 1 is used as, for example, the lighting in a relaxed state. In a state where the light diffusing cover 30 does not emit light, that is, the light source 50 is not lit and only the LED module 73 of the light guide plate 80 is lit, it is also possible to use the light guide plate 80 as a night light by dimming the brightness by reducing the number of the LED modules 73 to be lit or color adjusting the bulb color.

[0106] Figure 4B is a plan view showing the state of the lighting appliance 1 of the embodiment as viewed from the floor side. In Figure 4B , a state where the light guide plate 80 of a similar shape of a rectangle is arranged in a manner of surrounding the light diffusing cover 30 of a rectangular shape is shown. In addition, Figure 4C is a plan view showing the structural relationship of the light guide plate 80, the housing 60, the main body 10 having the opening 13, and the adapter 100 fitted in the opening 13 of the lighting appliance 1 of the embodiment as viewed from the ceiling surface 2 side.

[0107] Figure 5This is a top view showing the configuration of the mounting member 90 in the main body 10 of the lighting fixture 1 according to the embodiment. The main body 10 has a central opening 13 and an annular protrusion 14 protruding towards the ceiling surface 2 formed around it, a flat plate 11, and a wall portion 15 that rises substantially vertically from the flat plate 11 towards the front surface (ground) on the outside of the flat plate 11. When the housing 60 is mounted on the main body 10, it can be used as an auxiliary member for positioning the main body 10 when lifting the housing 60 along the wall portion 15.

[0108] The inner protrusion 61 of the edge of the housing 60 engages with the mounting member 90 disposed on the flat plate portion 11 of the main body 10 to fix the housing 60 to the main body 10.

[0109] Additionally, the annular mounting member 35 is arranged to surround the opening 13 within the protrusion 14 of the main body 10. The mounting member 35 is a member with a cross-sectional shape having a groove on its inner circumferential side, and the main body 10 is held by the adapter 100 by inserting a pair of claws 102 of the adapter 100 into the groove.

[0110] The mounting component 90 can be made of either metal or resin. Examples of metal materials include colored steel sheets, galvanized steel sheets, and stainless steel sheets for springs, while examples of resin materials include PP (polypropylene) and PBT (polybutylene terephthalate).

[0111] Adapter 100 can utilize conventionally known adapters. As a representative example of such an adapter 100, an adapter that forms... Figure 1 , Figure 2 The adapter (B) is a flat cylindrical shape with a hook blade 101 on its upper surface for engaging with a hook blade engagement hole 104 of a wiring fixture 3 disposed on the ceiling surface 2. The adapter 100 has wiring (not shown) for connecting to a power supply unit 20 within the lighting fixture 1. The wiring fixture 3 and the adapter 100 are mechanically and electrically connected by engaging the hook blade engagement hole 104 with the hook blade 101.

[0112] The method for installing the lighting fixture 1 on the ceiling surface 2 is as follows. First, engage the hook blade 101 of the adapter 100 with the hook blade engagement hole 104 of the wiring fixture 3 to secure the adapter 100 to the wiring fixture 3. Next, lift the main body 10 so that the adapter 100 passes through the central opening 13 of the main body 10 and is pushed upwards until the pair of claws 102 of the adapter 100 pass over the opening 13 of the main body 10.

[0113] The pair of claw portions 102 of the adapter 100 are biased in two directions outward by springs, so when the main body 10 is lifted in a manner that passes over the claw portions 102, the claw portions 102 engage with the mounting members 35 provided to the opening 13 of the main body 10, and the main body 10 is fixed to the adapter 100. Then, by lifting the housing 60 in a manner that is aligned with the main body 10 and horizontally rotating it, the mounting members 90 of the main body 10 engage with the inner protrusions 61 provided to the edge portions of the housing 60, and the housing 60 is fixed to the ceiling surface 2 together with the main body 10.

[0114] In addition, in order to detach the lighting fixture 1 from the adapter 100 from the ceiling surface 2, after rotating and detaching the housing 60, by pulling the pair of levers 83 located on the lower surface of the adapter 100 inward, the claw portions 102 are pulled inward of the adapter 100, the engagement between the claw portions 102 and the mounting members 35 is released, and the main body 10 can be detached.

[0115] The power supply device 20 is provided with: the adapter 100; a rectifier circuit that is connected to an external power supply by the wiring fixture 3, rectifies the current supplied from the external power supply of 100 V or the like, and the like; a transformer that converts the voltage after rectification to a prescribed voltage; a constant current supply circuit that supplies a constant current to the light source 50; and a control circuit that receives a reception sound generated by a transmission signal transmitted from a remote controller 110 located outside the lighting fixture 1, and performs power control and the like. The reception sound uses a buzzer sound, but a melody sound, a sound based on sound data, and the like can also be used. In addition, the power supply device 20 is electrically connected to the light source 50 and the LED module 73, and controls the lighting / turning off, dimming, color adjustment, and the like of the light source 50 and the LED module 73. In addition, when an audio device such as a speaker, an accessory device such as a photocatalyst type germ and odor removing machine, and the like are connected, these devices can be controlled by adding a control circuit that controls the power supply circuit 20.

[0116] Further, the remote controller 110 is provided with a display panel 111 and operation buttons 112 for instructing lighting / turning off, dimming, color adjustment, flickering lighting, and the like of the lighting appliance 1. The display panel 111 is arranged on the upper surface of the remote controller 110 and displays the state of lighting / turning off, dimming / color adjustment, flickering lighting, and the like of the lighting appliance 1. The remote controller 110 transmits an infrared signal as an instruction signal to the receiving device of the lighting appliance 1 by the pressing operation of the operation buttons 112 by the operator, and the signal receiving portion provided in the housing 60 receives the infrared signal transmitted from the remote controller 110 and transmits the received signal to the power supply device 20. The power supply device 20 controls the lighting / turning off and the like of the light source 50 and the LED module 73 in accordance with the instruction signal of the remote controller 110. Further, when the lighting appliance 1 is connected to an audio device such as a speaker, an accessory device such as a photocatalyst type germ and odor removing machine, and the like, these accessory devices can be controlled by operating the remote controller 110. The operation buttons 112 of the remote controller 110 for operating the lighting appliance 1 can be configured as a plurality of buttons each transmitting an independent instruction signal.

[0117] Figure 6 (A) is a plan view showing a modification of the housing 60 of the lighting appliance 1 according to the embodiment, Figure 6 (B) is a side view showing a modification of the housing 60 of the lighting appliance 1 according to the embodiment. The planar shape of the top portion 62 and the bottom portion 63 of the housing 60 of this modification is a square, and the top portion 62 is in the shape of a square pyramid having a smaller size than the bottom portion 63. Longitudinal slits 64 are provided at a plurality of positions on the side surface of the housing 60. The slits 64 are not limited to the modification and are also employed in the housing according to the embodiment to dissipate heat generated from heat sources such as the light source 50, the LED module 73, and the power supply device 20. The dissipation of heat from these heat sources can be efficiently performed not only from the slits 64 but also from the housing 60, the main body 10, the light guide plate 80, and the light diffusion cover 30, and heating in the housing 60 can be prevented. Further, the dissipation of heat can be efficiently performed from the opening of the top portion 62 of the housing 60. Furthermore, the slits 64 have the effect of improving the volume of the reception sound transmitted when receiving the operation signal transmitted from the remote controller 110.

[0118] The present application has been described above with reference to the embodiments, but the present application is not limited to the above-described embodiments. The structure and details of the present application can be variously changed within the scope of the present application by those skilled in the art.

[0119] According to the present application, in the lighting appliance, the light diffusion and anti-glare properties can be improved and the structure can be simplified, and therefore, the present application can be applied not only to a ceiling-mounted lamp of the type of a wiring appliance mounted in a ceiling wiring box arranged on a ceiling surface and the like, and a ceiling lamp of the type of a pendant lamp hung from a ceiling surface, but also to a guide lamp, a disaster prevention lamp, a street lamp, and various lighting appliances.

Claims

1. A lighting fixture, characterized in that, have: The main body has an opening in the center; An adapter, disposed in the opening, is mechanically and electrically connected to the wiring fixture; The housing is detachably connected to the mounting piece disposed at the edge of the main body; A roughly quadrilateral light source is disposed within the housing and has multiple light-emitting elements mounted on a substrate; A flat, rectangular light guide plate with an opening that is approximately the same shape as the light source; A rectangular light diffuser covers the light emitting surface of the light source; and A frame is disposed between the light guide plate and the light diffuser, and is disposed at the opening of the light guide plate. The light-emitting elements are mounted in rows on the substrate. The frame has LED modules that emit light towards the side of the light guide plate. The light diffuser is disposed on the front surface side of the frame in such a manner that it is surrounded by the light guide plate. Inside the housing, the light source, the light guide plate, the frame, and the light diffuser are arranged sequentially from the ceiling side. The frame is generally square in shape, with L-shaped frame components surrounding the four sides and having openings. At the bottom of these frame components, multiple LED modules are arranged in a row along the generally square frame components. The opening inside the light guide plate is placed on the bottom of the frame member, which protrudes outward in a generally horizontal direction.

2. The lighting fixture according to claim 1, characterized in that, The light guide plate extends in a generally horizontal direction and has a decorative section that allows light emitted from the LED module and passed through the light guide plate to be taken out of the light guide plate.

3. The lighting fixture according to claim 2, characterized in that, The lighting fixture includes a power supply device disposed between the housing and the main body. The power supply device receives power from the adapter, supplies power to the light source and the LED module, and controls the lighting and extinguishing, dimming and color adjustment of the light source and the LED module.

4. The lighting fixture according to claim 3, characterized in that, A signal receiving unit is provided, which receives an indication signal sent from a remote control located outside the lighting fixture and sends the indication signal to the power supply device.

5. The lighting fixture according to claim 1 or 2, characterized in that, The housing is held in place by an engagement between a mounting member disposed on the body and an inner protrusion provided on the housing.

6. The lighting fixture according to claim 3, characterized in that, The power supply device causes the brightness of the LED module to change regularly or irregularly over time between 0% and 90%, thereby controlling the brightness of the decorative part of the light guide plate.

7. The lighting fixture according to claim 3, characterized in that, The power supply device causes the light color of the LED module to change continuously, either regularly or irregularly, thereby controlling the color of the decorative part of the light guide plate.

8. The lighting fixture according to claim 6, characterized in that, The power supply device controls the dimming of the LED module based on a 1 / f fluctuation.

9. The lighting fixture according to claim 7, characterized in that, The power supply device controls the color adjustment of the LED module based on a 1 / f fluctuation.

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