JP2015028951A - Luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a luminaire capable of suppressing mutual thermal interference between each of light emitting elements of a light source part and a circuit component of a lighting device.SOLUTION: The luminaire includes: a mounted part 5 to be mounted on a luminaire mounting face C; a light source part 2 which has a plurality of light emitting elements 22 as light sources arranged around the mounted part 5, and to the front face side of which light emitted from the light emitting elements 22 is directed; and a lighting device 3 which controls the light source part 2 to be lit on, has a circuit component 32 arranged around the mounted part 5 inside the light emitting elements 22, and is arranged at a clearance d on the back face side of the light source part 2.

Description

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

  Recently, along with the high output, high efficiency, and widespread use of LEDs, lighting fixtures that can be used indoors or outdoors using LEDs as light sources have been developed.

  For example, in a lighting fixture for a general house, an adapter is electrically and mechanically connected to a hanging sealing body installed on a fixture mounting surface such as a ceiling surface, and the adapter has a light source unit using an LED as a light source. The instrument body can be attached. In such a luminaire, indoor lighting is performed by light emitted from the light source unit.

  On the other hand, light-emitting elements such as LEDs generate heat by lighting, and as the temperature rises, the light output decreases and the service life is shortened. For this reason, for lighting fixtures that use solid light emitting elements such as LEDs and EL elements as light sources, it is possible to suppress the temperature of the light emitting elements from rising in order to extend the service life or improve characteristics such as light emission efficiency. It is necessary.

  Moreover, the lighting fixture is provided with the lighting device connected to a light source part. This lighting device includes a circuit component and has a function of controlling the lighting of the light emitting element by supplying power to the light source unit.

LED ceiling light: Sharp [July 22, 2011 Internet search] (http://www.sharp.co.jp/led_lighting/ceiling/)

  However, in the lighting fixture as described above, the heat generated from the light emitting element in the light source unit and the heat generated from the heat generating parts such as semiconductor parts and resistance elements among the circuit parts in the lighting device interfere with each other to emit light. There is a possibility of excessive temperature rise of elements and circuit components.

  This invention is made | formed in view of the said subject, and it aims at providing the lighting fixture which can suppress the mutual thermal interference with the light emitting element in a light source part, and the circuit components in a lighting device.

  A lighting fixture according to an embodiment of the present invention has a metal main body and a plurality of light emitting elements as light sources arranged so as to surround the center of the main body, and the mounting surface of the light emitting elements faces the front side. A circuit board having a back side attached to the main body, a cover body attached to the back side of the main body, and a plurality of circuit components in the cover at a distance from the back side of the main body. And a lighting device that controls lighting of the plurality of light emitting elements.

  According to the embodiment of the present invention, it is possible to provide a lighting fixture that can suppress mutual thermal interference between the light emitting element in the light source unit and the circuit component in the lighting device.

It is a perspective view which shows the lighting fixture which concerns on embodiment of this invention. It is a disassembled perspective view of the front side which shows the lighting fixture. It is a disassembled perspective view of the back side which shows the lighting fixture. In the same lighting fixture, it is a top view which removes and shows a shade and a light source part cover. It is a perspective view of the back side which shows the lighting fixture. It is a longitudinal cross-sectional view which shows the same lighting fixture. It is a top view which shows the positional relationship of a light source part and a lighting device. It is sectional drawing which shows the state which attached the lighting fixture to the ceiling surface.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 8. 1 to 6 and 8 show a lighting fixture, and FIG. 7 shows a light source unit and a lighting device. In each drawing, the wiring connection relationship using lead wires or the like is 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.

  The lighting fixture includes a fixture main body 1, a light source 2, a lighting device 3, and a center member 4. Furthermore, the lighting fixture includes an attachment portion 5, an optical sensor 6, a shade 7, a cover member 8, an indirect light source portion 9, and an elastic member 10. Moreover, the adapter A electrically and mechanically connected to the hooking sealing body Cb installed in the ceiling surface C as an instrument attachment surface is provided (refer FIG. 8). 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. These components will be described sequentially.

  As shown in FIG. 2 thru | or FIG. 6, the instrument main body 1 is the chassis which has the heat conductivity formed circularly from the flat plate of metal materials, such as a cold-rolled steel plate, The attachment part mentioned later in the approximate center part A circular opening 11 in which 5 is disposed is formed. The opening 11 is formed in a shape that is substantially equal to the outer shape of the mounting portion 5 with a part of a circular shape protruding outward.

  On the outer peripheral side of the opening 11, a projecting portion 12 having a quadrangular shape with a corner portion having an R shape and projecting to the back side is formed. Further, on the outer peripheral side of the protruding portion 12, a circular annular protruding portion 13 protruding to the front surface side is formed. Further, on the outer peripheral side of the projecting portion 13, a circular annular projecting portion 14 is formed so as to project on the back side so as to be continuous with the projecting portion 13 in the radial direction, in other words, a circular annular projecting portion 14 forming a recess on the front side. .

  In the recess formed by the projecting portion 14, a saddle bracket 75 to which the shade 7 is detachably attached is disposed. These protrusions 12, 13, and 14 mainly function as attachment portions for members attached to the chassis, and also have a function for reinforcing the strength of the chassis and a function for increasing the heat radiation area.

  The main body 1 corresponds to a chassis in this embodiment, but may be referred to as a case, a reflector, or a base. In general, it means a member or a part where the light source unit 2 is directly or indirectly arranged, and is not interpreted in a particularly limited manner.

  As shown in FIGS. 2, 4, 6 and 8, the light source unit 2 includes a substrate 21 and a plurality of light emitting elements 22 mounted on the substrate 21. 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. The light emitting element 22 is electrically connected to this wiring pattern. 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 mounted in a plurality of rows along the circumferential direction of the circle-shaped substrate 21, in the present embodiment, in three rows on the circumference of substantially concentric circles having different radii. That is, it is mounted over the inner circumferential row, the outer circumferential row, and an intermediate row between the inner circumferential row and the outer circumferential row.

  The LED package is roughly composed of an LED chip disposed in a cavity 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 packages mounted on the inner and outer rows are used in white light (N) and light bulb color (L), which are on the circumference. Are arranged alternately at substantially equal intervals. The LED chip is an LED chip that emits blue light. In the translucent resin, a phosphor is mixed, and in order to be able to emit white light of daylight white (N) and light bulb color (L), the light is mainly complementary to the blue light. Yellow phosphors that emit some yellow light are used.

  As the LED packages mounted in the middle row, those that emit light in red (R), green (G), and blue (B) are used. Accordingly, the LED chips are LED chips that emit red, green, and blue light, respectively, and these LED chips are sealed with a translucent resin for molding.

  These LED packages that emit red (R), green (G), and blue (B) light are sequentially spaced on the circumference sequentially from red (R), green (G), and blue (B) at substantially equal intervals. It is arranged in the space.

  The arrangement of red (R), green (G), and blue (B) in the LED package is not specified and may be in any order. For example, the arrangement is in the order of green (G), red (R), and blue (B). May be. Further, adjacent LED packages are preferably arranged with different emission colors, but are not particularly limited. As an example, it is possible to continuously arrange two same colors such as red (R), red (R), green (G), green (G), blue (B), and blue (B). is there.

  In this way, a plurality of light emitting elements 22 that emit light in the daylight white color (N) and the light bulb color (L) are arranged in a line on the circumference of substantially concentric circles having different radii. A plurality of light emitting elements emitting light in red (R), green (G), and blue (B) in a row between the light emitting elements 22 that emit light in the daylight white (N) and light bulb color (L). The light emitting element 22 is disposed.

  Accordingly, a plurality of light-emitting elements 22 having different emission colors, that is, light-emitting elements 22 that emit daylight white (N), light bulb color (L) red (R), green (G), and blue (B) are arranged. Therefore, the range of light colors that can be expressed by mixing these light is wide, and the light color can be appropriately adjusted by adjusting the output of the light emitting element 22.

  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 light source unit 2 configured as described above includes a substrate 21 on the front side of the main body 1 and around the opening 11, in other words, a mounting unit 5 described later, as representatively shown in FIGS. 4 and 6. Located on the periphery, the mounting surface of the light emitting element 22 is disposed so as to face the front side, that is, the lower irradiation direction. Moreover, it attaches by fixing means, such as a screw | thread, so that the back surface side of the board | substrate 21 may closely_contact | adhere to the inner surface side of the main body 1. FIG. 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.

  Note that the substrate 21 may be directly attached to the main body 1 and disposed, or may be indirectly attached via another member. The configuration is not particularly limited.

  As shown in FIGS. 2 and 6, a light source unit cover 25 is disposed on the front side of the light source unit 2. The light source cover 25 is made of, for example, a transparent synthetic resin having an insulating property such as polycarbonate or acrylic resin, and is integrally formed in a substantially circle shape along the arrangement of the light emitting elements 22, and includes the light emitting elements 22. Are arranged so as to cover the entire surface of the substrate 21.

  Therefore, the light emitted from the light emitting element 22 passes through the light source unit cover 25. Further, since the entire surface of the substrate 21 is covered, the charging unit is covered with the light source unit cover 25 to ensure insulation. Furthermore, since the light source cover 25 is attached by screwing in contact with the main body 1, heat from the main body 1 is conducted and radiated.

  The lighting device 3 includes a circuit board 31 and a circuit component 32 mounted on the circuit board 31 as representatively shown in FIGS. 3, 6, and 7. The circuit board 31 is formed in a substantially square shape from glass epoxy resin (FR-4) or the like, and a notch 31a is formed in the center. The notch 31a has a circular shape and is continuously cut out so that a part of the notch 31a protrudes outward. The notch 31a is a part through which a mounting part 5 described later is inserted.

  Therefore, the circuit board 31 is formed in a plate shape so as to surround the periphery of the center portion, and the circuit component 32 is mounted on the surface side thereof. Specifically, circuit parts 32 necessary for controlling the lighting of the light emitting element 22 are mounted on the circuit board 31 around the notch 31a. For example, a control IC, a resistance element, a transformer, a switching element A transistor, a constant voltage diode, a full-wave rectifier, a capacitor, and the like are mounted.

  Also, in the vicinity of the notch portion 31a, a heat generating component 32H having a relatively large heat generation amount, such as a control IC, a resistance element, and a transformer, is mainly mounted among the circuit components 32. Circuit components with a small amount of generated heat are mounted.

  The circuit board 32 is electrically connected to the adapter A side, and is connected to a commercial AC power source via the adapter A. Therefore, the lighting device 3 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 lighting of the light emitting element 22.

  Such a lighting device 3 is attached to and covered with the lighting device cover 35 and is arranged on the back side of the main body 1. In this case, the circuit board 31 is attached with the circuit component 32 facing the front side (the lower side in the drawing).

  The lighting device cover 35 is formed in a substantially rectangular short cylinder shape by a metal material such as a cold rolled steel plate, and the side wall 35a is inclined so as to expand toward the front surface side. An opening 35c is formed at the center.

  As shown in FIGS. 3, 5, and 6, the lighting device cover 35 has a front flange mounted on the protruding portion 12 of the chassis that is the main body 1, and is screwed and thermally coupled. Mounted.

  As shown in FIGS. 2, 4 and 6, the center member 4 is made of a synthetic resin material such as PBT resin, is formed in a substantially short cylindrical shape, and is hooked at the center to face the sealing body Cb. An opening 41 is provided. An annular space 42 is formed around the opening 41, and the optical sensor 6 described later is disposed in the space 42. Further, a light receiving window 43 that faces the light receiving portion of the optical sensor 6 is formed on the front wall of the center member 4.

  As shown mainly in FIG. 6, the center member 4 configured in this way is attached to the chassis with a flange on the rear side screwed to the chassis via the light source cover 25. The center member 4 can be directly or indirectly attached to the chassis, and its specific attachment configuration is not limited.

  The attachment portion 5 is an adapter guide, a member through which the adapter A is inserted and engaged, and a member for attaching the lighting fixture to the ceiling surface C. As shown in FIGS. 3 and 6, the adapter guide is formed in a substantially cylindrical shape, and an engagement port 51 through which the adapter A is inserted and engaged is provided at the center. The adapter guide is disposed corresponding to the opening 11 formed in the central portion of the main body 1.

  Note that the attachment portion 5 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.

  As shown in FIG. 6, the optical sensor 6 is an illuminance sensor, and includes a sensor element such as a photodiode, and operates to detect ambient brightness and output a detection signal. Thereby, when the surroundings are bright, the light source unit 2, that is, the light emitting element 22 is controlled to be dimmed (dimmed) and lit.

  The optical sensor 6 is mounted on the substrate and is disposed and attached in the space 42 of the center member 4 so that the light receiving portion thereof faces the light receiving window 43.

  The shade 7 is formed in a substantially circular shape from a material having translucency such as acrylic resin and having a milky white diffusivity, and a circular opening 71 is formed in the central portion. A shade decorative frame 7a is attached to the outer periphery of the shade 7, and the shade decorative frame 7a is formed of a transparent material made of acrylic resin or the like.

  The shade 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 shade 7, the shade mounting bracket 74 provided on the shade 7 is engaged with the shade receiving bracket 75 provided in the recess formed by the protruding portion 14 of the main body 1. It is installed by.

  Further, when removing the shade 7, it can be removed by rotating the shade 7 in the direction opposite to that at the time of attachment and releasing the engagement between the shade attachment fitting 74 and the shade receiving fitting 75.

  The shade 7 is preferably configured to be detachably attached to the outer peripheral edge of the main body 1, but may be configured to be fixed to the main body 1 by a fixing means such as a screw. This is because in a lighting fixture that can be expected to have a long lifetime using the light emitting element 22 as a light source, there is little need to replace the light source for maintenance or to clean the inside.

  The distance between the light source cover 25 and the shade 7 is set to 20 to 60 mm, preferably 30 to 50 mm. Thereby, the uniformity degree of irradiation light becomes favorable, and the heat conducted from the main body 1 to the light source cover 25 is effectively radiated through the shade 7.

  Furthermore, you may make it stick the polyolefin sheet | seat etc. which have heat conductivity to the inner surface side of the shade 7. FIG. In this case, the heat dissipation from the shade 7 can be improved.

  As shown in FIGS. 2 and 6, the cover member 8 is formed in a circular shape from a material such as a transparent acrylic resin. The cover member 8 corresponds to the opening 71 of the shade 7, is attached to the front wall of the center member 4, and is disposed so as to cover and close the opening 41 of the center member 4. Further, the cover member 8 is formed with a circular transmission portion 81 that faces the light receiving window 43 of the optical sensor 6.

  In addition, it is desirable to stick an opaque film material or the like on the front surface side of the cover member 8 leaving at least the transmission part 81.

  The indirect light source unit 9 is disposed on the back side of the main body 1 and mainly has a function of illuminating the ceiling surface brightly. As shown in FIGS. 3, 5, and 6, a plurality of indirect light source portions 9 are disposed around the mounting portion 5, and a substrate 91 and a plurality of indirect light source portions 9 mounted on the substrate 91 are disposed. And a light emitting element 92.

  The substrate 91 is formed in a substantially rectangular flat plate, and the light emitting elements 92 are mounted in a line along the longitudinal direction of the substrate 91.

  Substrates 91 on which the light emitting elements 92 are mounted are attached to four locations on the side wall 35 a of the lighting device cover 35. In this case, the lighting device cover 35 is formed in a substantially square shape, and the substrate 91 is attached to the linear flat surface of the side wall 35a, so that the attachment is stably performed.

  Further, since the side wall 35a that forms the mounting portion of the substrate 91 is formed in an inclined shape that expands toward the front side, the substrate 91 is directed obliquely upward, that is, in the ceiling surface direction, and the light emitting element The light emitted from 92 is effectively irradiated toward the ceiling surface direction.

  Further, each indirect light source unit 9 is covered with a box-like translucent cover 93.

  The light emitting element 92 is an LED, like the light source unit 2, and is a surface mount type LED package. The light emitting element 92 is connected to the lighting device 3 and is controlled to be turned on.

  The elastic member 10 is attached in the vicinity of the attachment position of each of the plurality of indirect light source units 9. The elastic member 10 is a member disposed so as to be interposed between the lighting device and the ceiling surface C in a state in which the lighting device is attached to the ceiling surface C as the device mounting surface (see FIG. 8).

  Specifically, the elastic member 10 is a metal spring member made of a material such as stainless steel, and is attached to the back side of the lighting device cover 35 corresponding to the attachment position of each indirect light source unit 9. . The elastic member 10 is formed by bending a horizontally long rectangular leaf spring, and has a fixing portion 10a at the center, and obliquely upward (back side) from both sides of the fixing portion 10a. An extending part 10b is formed so as to expand, and a rectangular contact part 10c is formed on the tip side.

  Further, a screw through hole is formed in the fixing portion 10 a, and the elastic member 10 is attached to the lighting device cover 35 by an attachment screw that passes through the screw through hole and is screwed into the back side of the lighting device cover 35. Fixed to the back side.

  A plurality of such elastic members 10, that is, all of the four elastic members 10 have the same form and have the same elastic force.

  In the fixed state of the elastic member 10, as shown in FIG. 6, the elastic member 10 disposed on the back side of the lighting device cover 35 has a fixing portion 10a as a fulcrum in the front side direction (arrow direction shown in the drawing). It can be elastically deformed with a spring action.

  As shown in FIG. 8, the adapter A is electrically and mechanically connected to the hooking sealing body Cb installed on the ceiling surface C by the hooking blade provided on the upper surface side, and has a substantially cylindrical shape. A pair of locking portions A1 are provided on both sides of the peripheral wall so as to always protrude 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 (not shown) connected to the lighting device 3 is led out from the adapter A, and is connected to the lighting device 3 via a connector.

  In the lighting fixture thus configured, the positional relationship between the light source unit 2 and the lighting device 3 will be described with reference to FIGS. 4, 6, and 7. FIG. 7 is an explanatory diagram illustrating the positional relationship between the light source unit 2 and the lighting device 3 in a plan view.

  The light source unit 2 is configured by mounting a plurality of light emitting elements 22 on the circumference of a substantially circle-shaped substrate 21. The substrate 21 is attached such that the back side is thermally coupled to the main body 1. Therefore, the plurality of light emitting elements 22 are disposed around the mounting portion 5, and specifically, as shown mainly in FIGS. 4 and 7, so as to surround the mounting portion 5. It is arranged.

  On the other hand, as shown in FIG. 6, the lighting device 3 is disposed on the back side of the main body 1, and is attached to the lighting device cover 35 with a separation distance d in the back direction from the light source unit 2. . Furthermore, the circuit component 32 is disposed so as to surround the periphery of the mounting portion 5 that is inserted through the notch portion 31a of the circuit board 31, and as shown in FIG. 7, a plurality of light emitting elements arranged on the circumference are arranged. It is located inside the element 22.

  Further, in the vicinity of the attachment portion 5, among the circuit components 32, a heat generating component 32 </ b> H having a relatively large heat generation amount is arranged.

  Therefore, the light emitting element 22 in the light source unit 2 and the circuit component 32 in the lighting device 3 are positioned with a separation distance d in the back direction, and the circuit component 32 is positioned inside the light emitting element 22. That is, the light emitting element 22 and the circuit component 32 are arranged so as to be shifted in both the vertical direction (frontal direction) and the horizontal direction (radial direction). Further, among the circuit components 32, the heat generating component 32 </ b> H is disposed away from the light emitting element 22.

  For this reason, the light emitting element 22 and the circuit component 32 are arranged so as to be thermally separated, and mutual thermal interference of heat generated from the light emitting element 22 and the circuit component 32 can be suppressed.

  Further, since the light emitting element 22 and the circuit component 32 are disposed around the mounting portion 5, the light emitting element 22 and the circuit component 32 can be configured compactly. Furthermore, since the lighting device 3 is disposed on the back side of the main body 1, a predetermined light distribution range can be secured without narrowing the range of light emitted from the light source unit 2.

  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. With the cover member 8 of the luminaire removed, the fixture body 1 is held until the engaging portion 51 of the adapter A is securely engaged with the engagement port 51 of the adapter guide while aligning the engagement port 51 of the adapter guide with the adapter A. The mounting operation is performed by manually pushing up from the lower side against the elastic force of the elastic member 10.

  Next, the cover member 8 is attached, and the cover member 8 is closed and covered with the opening 41 in the center portion of the center member 4 facing the hooking sealing body Cb.

  In this state, the elastic member 10 is elastically deformed, and the contact portion 10c is in elastic contact with the ceiling surface C. And the contact part 10c can contact | abut so that it may be parallel to the ceiling surface C substantially planarly, or a front-end | tip part may face a little perpendicular direction.

  Therefore, the elastic member 10 is interposed between the back side of the lighting device cover 35, which is the back side of the fixture body 1, and the ceiling surface C with elastic deformation in the compression direction. By the spring action, the ceiling surface C is securely held and attached.

  More specifically, the distance between the ceiling surface C and each indirect light source unit 9 can be kept constant by the action of the elastic member 10, and the emission angle of light emitted from each indirect light source unit 9 is constant. Can be. As a result, it is possible to stabilize the light distribution characteristics, and it is possible to perform indirect illumination by effectively irradiating the ceiling surface C. Moreover, since the elastic member 10 corresponds to each indirect light source unit 9 and is disposed in the vicinity thereof, the effect of making the spacing between the ceiling surface C and each indirect light source unit 9 more reliable is ensured. Can be expected.

  When removing the luminaire, the cover member 8 is removed, and the lever provided on the adapter A is operated through the opening 41 of the center member 4 to disengage the engaging portion A1 of the adapter A. be able to.

  When power is supplied to the lighting device 3 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 in the light source unit 2, and each light emitting element 22 is turned on. The light emitted from the light emitting element 22 to the front side is transmitted through the light source cover 25, diffused by the shade 7, and transmitted to be emitted outward. Therefore, the lower part is illuminated within a predetermined light distribution range.

  At the same time, when the indirect light source unit 9 is energized, each light emitting element 92 is turned on, and the light emitted obliquely upward from the light emitting element 92 is transmitted through the translucent cover 93, and the adapter guide. The ceiling surface is mainly irradiated so as to radiate from the surroundings of 5. Therefore, the ceiling surface becomes bright and the feeling of brightness in the space can be improved.

  In this case, stabilization of the light distribution characteristic of the light emitted from the indirect light source unit 9 can be realized, and effective indirect illumination can be performed.

  As described above, when the light emitting element 22 is used as the light source in the light source unit 2, the light emitted from the light emitting element 22 has a strong directivity, and thus the light distribution range tends to be narrowed. By providing the indirect light source unit 9 on the back side of 1, the brightness of the space can be improved. Therefore, providing the indirect light source unit 9 is an effective means when the light source of the light source unit 2 is the light emitting element 22.

  Further, the lighting state of the light source unit 2 and the indirect light source unit 9 is controlled by an optical sensor 6 that detects ambient brightness and outputs a detection signal.

  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 thermally coupled to the main body 1. Moreover, since the protrusion parts 12, 13, and 14 are formed in the main body 1, the heat radiation area can be increased, and the heat radiation effect can be further enhanced.

  In addition, since the lighting device cover 35 is placed and attached to the projecting portion 12 of the main body 1, heat is conducted from the main body 1 to the lighting device cover 35 and heat dissipation is promoted.

  On the other hand, the heat generated from the lighting device 3 is dissipated mainly by the convection of the space in the lighting device cover 35.

  In this case, the light emitting element 22 and the circuit component 32 are positioned with a separation distance d in the back direction, and the circuit component 32 is positioned inside the light emitting element 22 and thus is thermally separated. It is arrange | positioned so that mutual thermal interference can be suppressed. Therefore, an excessive temperature rise of the light emitting element 22 and the circuit component 32 can be suppressed.

  Furthermore, since the heat generating component 32H in the circuit component 32 is disposed away from the light emitting element 22, the mutual thermal interference can be more effectively suppressed.

  Further, the heat generated from the light emitting element 92 of the indirect light source unit 9 is conducted from the back side of the substrate 91 to the side wall 35a of the lighting device cover 35, and further transmitted to the elastic member 10 to be radiated.

  As described above, according to the present embodiment, it is possible to provide a lighting fixture that can suppress mutual thermal interference between the light emitting element in the light source unit and the circuit component in the lighting device.

  In addition, this invention is not limited to the structure of the said embodiment, A various deformation | transformation is possible in the range which does not deviate from the summary of invention. Moreover, the said embodiment is shown as an example and is not intending limiting the range of invention.

DESCRIPTION OF SYMBOLS 1 ... Instrument main body (chassis), 2 ... Light source part, 3 ... Lighting apparatus, 4 ... Center member, 5 ... Mounting part (adapter guide), 6 ... Optical sensor, 7 ... Sade, 8 ... Cover member, 9 ... Indirect light source, 10 ... Elastic member, 21 ... Substrate, 22 ... Light emitting element (LED), 25 ... Light source Cover, 31 ... Substrate of lighting device, 32 ... Circuit component, 32H ... Heat generating component, 35 ... Lighting device cover, A ... Adapter, C ... Appliance mounting surface (ceiling surface) , Cb ... Wiring device (hook ceiling body), d ... separation distance

Claims (3)

A metal body;
A substrate having a plurality of light-emitting elements as light sources disposed so as to surround the center of the main body, and a back surface side attached to the main body so that a mounting surface of the light-emitting elements faces the front side;
A cover body attached to the back side of the main body;
A lighting device in which a plurality of circuit components are disposed in the cover with a separation distance from the back side of the main body facing the back side of the main body, and controls the lighting of the plurality of light emitting elements;
The lighting fixture characterized by comprising.   The lighting fixture according to claim 1, wherein an engagement port in which a wiring fixture installed on a main body attachment surface is disposed is provided at a center of the back surface of the cover body.   The light fixture according to claim 1, wherein a light source cover that covers the front surface of the substrate including the light emitting element is disposed on the front surface side of the substrate.

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