JP6089336B2 - Lighting device - Google Patents

Description

  The present invention relates to a lighting device, and more particularly to heat dissipation of a power supply unit for supplying power to a light source.

  2. Description of the Related Art Conventionally, there is provided a ceiling-mounted illumination device that is attached to a ceiling using a semiconductor light emitting element such as an LED (Light Emitting Diode) as a light source. Such an illumination device includes a power supply unit that converts commercial AC power into DC power for lighting the LED. When the output and function (for example, dimming function) of the light source are different, the performance required for the power supply unit is also different. Therefore, when the light source is replaced with a new one, it is preferable to replace the power source unit with one suitable for it. For this reason, a lighting device has been devised in which the light source and the power supply unit are integrated as a light emitting unit, and the light emitting unit is detachable from the lighting fixture (for example, Patent Document 1).

JP 2011-142063 A

In the illuminating device disclosed in Patent Document 1, a locking piece of a leaf spring-shaped holder provided on the main body 10 (lighting fixture) is engaged with a locking groove provided on a side surface of the LED unit 2 (light emitting unit). Thus, the light emitting unit is attached to the lighting fixture. In other words, the light emitting unit is attached while being hooked on the locking piece.
Since the luminous efficiency of the LED decreases as the temperature rises, in a lighting device using the LED as a light source, the heat dissipation of the light emitting unit is important. In the configuration of Patent Document 1, the light emitting unit is attached in a state of being hooked on the locking piece of the holder. For this reason, the contact area between the holder and the light emitting unit is small, and there are many gaps between the light emitting unit and the inner surface of the housing recess, so that heat is not easily transmitted from the light emitting unit to the lighting fixture side. In particular, since the power supply unit is housed in the recess of the lighting fixture, heat tends to be trapped. When the temperature of the power supply unit increases, the heat is transmitted to the LED, which causes a reduction in the light emission efficiency of the LED.

  An object of this invention is to provide the illuminating device with which the heat dissipation of the power supply part was improved in view of the said problem.

  In order to achieve the above object, a lighting device according to one embodiment of the present invention includes a light-emitting unit including a semiconductor light-emitting element and a power supply unit that supplies power for lighting the semiconductor light-emitting element to the semiconductor light-emitting element; And a lighting device holding the light emitting unit. When the main emission direction of the light from the semiconductor light emitting element is set to the lower side, the lighting fixture has an accommodation recess opened downward and thermal conductivity, and is fixed to the inner surface of the accommodation recess in a thermally connected state. And a cover member. The light emitting unit further includes a plate-like attachment member that is attached to the lower side of the lighting fixture and closes the opening of the housing recess. The power supply unit includes a power supply substrate that converts commercial power into power for lighting the semiconductor light emitting element, and a power supply case that constitutes an outline of the power supply unit and accommodates the power supply substrate therein. The semiconductor light emitting element is fixed to the lower surface of the mounting member, and the power supply case is fixed to the upper surface of the mounting member. In a state where the light emitting unit is held by the lighting fixture, at least a part of the power supply case is located in the housing recess, and the cover member is in surface contact with the power supply case in the housing recess. .

In another aspect, the power supply case may have an upper surface and a side surface, and the cover member may be in surface contact with the side surface of the power supply case and separated from the upper surface of the power supply case.
In another aspect, the power supply case may have a rectangular tube shape, and may include four flat power supply case side plate portions that constitute a cylindrical wall of the square tube. And the side surface of the said power supply case consists of the outer surface of the said four power supply case side plate parts, and the said cover member may be in surface contact with at least one of the outer surface of the said four power supply case side plate parts. .

  Moreover, in another aspect, the said cover member is a square cylinder shape, Comprising: You may have four flat cover member side-plate parts which comprise the cylinder wall of the said square cylinder. In the state where the light emitting unit is attached to the lighting fixture, the power supply case is located in the rectangular tube of the cover member, and the inner surface of the four cover member side plate portions is the four power supply case side plate portions. The outer surface may be in surface contact with each other.

In another aspect, the cover member may have three flat cover member side plate portions. In the state in which the light emitting unit is attached to the lighting fixture, the three cover member side plate portions may be in surface contact with any one of the three outer surfaces of the four power supply case side plate portions. Good.
In another aspect, the cover member may have a pair of flat cover member side plate portions. In the state in which the light emitting unit is attached to the lighting fixture, the pair of cover member side plate portions may be in surface contact with any one of the two outer surfaces of the four power supply case side plate portions. Good.

  In another aspect, the pair of cover member side plate portions of the cover member are arranged to face each other, and the power supply case is connected to the pair of cover member side plates in a state where the light emitting unit is attached to the lighting fixture. It may be located between the parts. The pair of cover member side plate portions may be in surface contact with any two of the opposing outer surfaces of the four power supply case side plate portions.

In another aspect, the cover member may have one flat cover member side plate portion. In the state where the light emitting unit is attached to the lighting fixture, the cover member side plate portion may be in surface contact with any one of the outer surfaces of the four power supply case side plate portions.
In another aspect, the power supply case may have a cylindrical shape, and the cover member may have an inner surface having a curved shape corresponding to a side surface of the power supply case. In the state where the light emitting unit is attached to the lighting fixture, the inner side surface of the cover member may be in surface contact with the side surface of the power supply case.

In another aspect, the inner surface of the receiving recess has an upper inner surface and a side inner surface, and the cover member may be fixed to the upper inner surface of the receiving recess.
In another aspect, the accommodation recess has an upper inner surface and a side inner surface, and the cover member may be fixed to the side inner surface of the accommodation recess.
In another aspect, the lower end of the cover member and the upper surface of the mounting member may be separated from each other.

  In another aspect, the light emitting unit and the lighting fixture may have a long shape, and the semiconductor light emitting elements may be arranged along the longitudinal direction.

  According to the configuration of the lighting device according to one embodiment of the present invention, since the power supply unit and the cover member are in surface contact, heat is easily transmitted from the power supply unit to the cover member. Further, since the cover member has thermal conductivity and is fixed in thermal connection with the inner surface of the housing recess of the lighting fixture, the heat transferred from the power source to the cover member is further transferred to the other portions of the lighting fixture. It is transmitted and is dissipated from there to the ceiling. Thereby, the heat dissipation of a power supply part can be improved and the excessive temperature rise of a power supply part can be suppressed.

(A) is the external appearance perspective view seen from diagonally downward of the illuminating device 10 which concerns on Embodiment 1. FIG. (B) is a perspective view which shows the illuminating device 10 of the state from which the lighting fixture and the light emission unit were isolate | separated. (C) is the perspective view seen from diagonally upward of the light emitting unit which concerns on Embodiment 1. FIG. FIG. 3 is an exploded perspective view of the lighting device 10. 2 is a cross-sectional view of the lighting device 10. FIG. In the illuminating device 1000 which concerns on Embodiment 2, a lighting fixture and the light emission unit are isolate | separated, Furthermore, the fixture main body and cover member of a lighting fixture are further shown, and it is a perspective view which shows the state. FIG. 11 is a cross-sectional view showing a state where a light emitting unit is attached to a lighting fixture in lighting device 1000. (A) is sectional drawing which shows the state by which the engaging claw of the light emission unit was inserted in the engaging hole of the lighting fixture. (B) is sectional drawing which shows the state in which a part of power supply part was accommodated in the accommodation recessed part of a lighting fixture. (C) is sectional drawing which shows the state which the attachment to the lighting fixture of the light emission unit was completed. (A) is a perspective view which shows the illuminating device 2000 which concerns on the modification 1 of the state from which the lighting fixture and the light emission unit were isolate | separated, and also the fixture main body and the cover member were isolate | separated. (B) is a perspective view which shows the illuminating device 3000 which concerns on the modification 2 of the state from which the lighting fixture and the light emission unit were isolate | separated, and also the fixture main body and the cover member were isolate | separated. (A) is a perspective view which shows the illuminating device 4000 which concerns on the modification 3 of the state from which the lighting fixture and the light emission unit were isolate | separated, and also the fixture main body and the cover member were isolate | separated. (B) is a perspective view which shows the illuminating device 5000 which concerns on the modification 4 of the state from which the lighting fixture and the light emission unit were isolate | separated, and also the fixture main body and the cover member were isolate | separated. In the illuminating device 6000 which concerns on the modification 5, it is sectional drawing which shows a mode that a light emission unit is attached to a lighting fixture. (A) is sectional drawing which shows the state before a light emission unit is attached to a lighting fixture. (B) is sectional drawing which shows the state in the middle of attaching the light emission unit to a lighting fixture. (C) is sectional drawing which shows the state which the attachment of the light emission unit to the lighting fixture was completed. (A) is a perspective view which shows the illuminating device 7000 which concerns on the modified example 6 of the state from which the lighting fixture and the light emission unit were isolate | separated, and also the fixture main body and the cover member were isolate | separated. FIG. 6B is a cross-sectional view of the lighting device 7000. (A) is a perspective view which shows the illuminating device 8000 which concerns on the modification 7 of the state from which the lighting fixture and the light emission unit were isolate | separated, and also the fixture main body and the cover member were isolate | separated. (B) is a cross-sectional view of the lighting device 8000. (A) is a perspective view which shows the illuminating device 9000 which concerns on the modified example 8 of the state from which the lighting fixture and the light emission unit were isolate | separated, and also the fixture main body and the cover member were isolate | separated. (B) is sectional drawing of the illuminating device 9000. FIG. (A) is a perspective view which shows the illuminating device 10000 which concerns on the modification 9 of the state from which the lighting fixture and the light emission unit were isolate | separated, and also the fixture main body and the cover member were isolate | separated. (B) is the perspective view which looked at the light emission unit and cover member which concern on the modification 9 from diagonally upward. (C) is sectional drawing of the illuminating device 10000. FIG. (A) is a perspective view which shows the illuminating device 11000 which concerns on the modification 10 of the state from which the lighting fixture and the light emission unit were isolate | separated, and also the fixture main body and the cover member were isolate | separated. (B) is the perspective view which looked at the light emitting unit and cover member which concern on the modification 10 from diagonally upward. (C) is sectional drawing of the illuminating device 11000. FIG.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. Each drawing is a schematic diagram, and the shapes, dimensions, ratios, and the like of components such as parts shown in the drawings are not necessarily illustrated strictly.
Embodiment 1
[1. overall structure]
Fig.1 (a) is the perspective view which looked at the illuminating device 10 which concerns on Embodiment 1 from diagonally downward. FIG. 1B is a perspective view of the state where the light emitting unit 200 is removed from the lighting fixture 100 of the lighting device 10 as viewed obliquely from below. FIG.1 (c) is the perspective view which looked at the light emission unit 200 from diagonally upward. FIG. 2 is an exploded perspective view of the lighting device 10. In FIGS. 1A, 1B, 1C, and 2, the Z direction is the top, and the direction opposite to the Z direction (hereinafter referred to as the “−Z direction”) is the bottom. In the illumination device 10, the main emission direction of light is downward (−Z direction).

The illumination device 10 is a so-called downlight that is attached to, for example, a general house or a ceiling of a building. The illuminating device 10 has a long shape and is used for an alternative application of a so-called straight tube fluorescent lamp.
As shown in FIGS. 1A and 1B, the lighting device 10 includes a lighting fixture 100 and a light emitting unit 200. The light emitting unit 200 includes an LED 212b (see FIG. 2) as a light source, and is attached to a lower portion of the lighting fixture 100. The lighting fixture 100 is attached to a ceiling or the like, and holds the light emitting unit 200 in a detachable manner. The luminaire 100 includes a luminaire main body 110, a cover member 120, and the like as main components. As shown in FIGS. 1B and 1C, the light emitting unit 200 includes a light source unit 210, a power source unit 220, a terminal block block 230, and the like as main components.

As shown in FIG. 2, the light source unit 210 includes a mounting member 211, an LED board 212, a front cover 213, and the like as main components.
[2. Configuration of each part]
(1) Light source unit The LED board 212 includes a printed board 212a, an LED 212b, a connector 212c, a connector 212d, and the like as main components. The printed board 212a is a long plate-like member having a rectangular shape in plan view made of an insulating material such as polyimide, and a plurality of LEDs 212b are arranged along the longitudinal direction on the lower surface thereof. At both ends in the longitudinal direction of the printed circuit board 212a, a connector 212c and a connector 212d for electrically connecting the LED 212b and the power supply unit 220 are respectively arranged. Although not shown in FIG. 2, printed wiring for electrically connecting the LEDs 212b is formed on the printed board 212a.

  The attachment member 211 is a long member having a U-shaped cross section formed by bending a sheet metal. In the portion corresponding to the bottom of the U shape, the center portion is recessed upward to form a flat bottom surface portion (lower surface) 211a. Portions corresponding to both sides of the U-shape are side portions 211b. The bottom surface portion 211a is a rectangular plane that is long in the longitudinal direction and is an area to which the LED substrate 212 is attached. At both ends in the longitudinal direction of the bottom surface portion 211a, one wiring hole 211c, which is a through hole for passing the wiring, is formed. In the present embodiment, two LED boards 212 are attached in series to the bottom surface portion 211a, and the two LED boards 212 are electrically connected to each other by electrically connecting the connectors 212d with wiring. Connected. At the center in the longitudinal direction of the bottom surface portion 211a, there is provided a concave portion 211d having a rectangular shape in plan view formed by recessing a part of the bottom surface portion 211a upward. The recess 211 d is for securing an insulation distance between the connector 212 d and the bottom surface portion 211 a of the attachment member 211 in a state where both the LED boards 212 are attached to the attachment member 211.

  The front cover 213 has a shape like one of a cylinder whose ends are closed and cut into two along the cylinder axis, and covers the lower side of the mounting member 211 to which the LED board 212 is mounted. The front cover body 213a, which is a portion corresponding to a cylindrical tube wall (having been cut in half), is made of a light-transmitting material and is subjected to a light diffusion process. As the light-transmitting material, a resin such as an acrylic resin, glass, or the like is used. Examples of the light diffusing treatment include a method of performing frost processing for forming innumerable fine irregularities on the surface, a method of mixing fine particles for diffusing light such as silica into a resin or glass, and the like. An end 213b, which is a portion corresponding to a cylindrical bottom of the cylinder (having been cut in half), is a semi-disc-shaped member, and is formed integrally with the front cover main body 213a from a translucent material. ing. Note that the end portion 213b is not necessarily formed from a light-transmitting material. When the end portion 213b is formed from a material that does not transmit light, the end portion 213b may be formed as a separate member from the front cover body 213a and then attached to both ends in the longitudinal direction of the front cover body 213a.

(2) Power supply unit The power supply unit 220 converts the commercial AC power received from the outside to generate DC power for lighting the LED 212b and supplies it to the LED 212b, and is fixed on the upper surface 211e of the mounting member 211. Has been. The power supply unit 220 includes, as main components, a power supply board 221, a power supply case 222 that houses the power supply board 221, and an insulating sheet for ensuring electrical insulation between the power supply board 221 and the power supply case 222. 223.

The power supply board 221 includes, as main components, a printed board 221a that is a plate member having a rectangular shape in plan view, and various electronic components 221b mounted on the printed board 221a.
The electronic component 221b includes components (for example, a transformer, a diode, a capacitor, etc.) necessary for generating DC power for lighting the LED 212b. In FIG. 2, only a part of the electronic component 221b is denoted by a reference numeral. Although not shown in FIG. 2, printed wiring for electrically connecting and operating each electronic component 221b and terminals to which the wiring 2 is connected are formed on the printed circuit board 221a. Yes.

  The power supply case 222 is formed of a material having good thermal conductivity, and is a member having a square cylindrical shape having a lower end opened and an upper end closed as an overall shape. The power supply case 222 includes a power supply case upper plate portion 222a corresponding to the upper bottom of the square tube, a pair of power supply case side plate portions 222b corresponding to the short cylindrical wall, and a pair of power supply cases corresponding to the long cylindrical wall. A side plate portion 222c is provided. The pair of power supply case side plate portions 222c are formed with wiring cutouts 222c2 through which the wiring 2 passes. As a material having good thermal conductivity for forming the power supply case 222, for example, a metal such as aluminum or stainless steel, a thermal conductive resin, or the like can be used.

  The insulating sheet 223 is a sheet-like member made of an electrically insulating material such as resin, and is disposed between the power supply board 221 and the power supply case 222 to ensure electrical insulation between the two. Adhesive or adhesive is applied to both surfaces of the insulating sheet 223, and the printed circuit board 221 a of the power supply substrate 221 is fixed to the inner upper surface 222 a 2 of the power supply case 222 by the insulating sheet 223. Note that when the power supply case 222 is formed of an electrically insulating material such as resin, the insulating sheet 223 may not be provided. In that case, the power supply board 221 may be fixed inside the power supply case 222 by an engagement structure or screwing.

With the power supply board 221 fixed inside, the power supply case 222 is fixed to the upper surface 211e of the mounting member 211 using screws, an adhesive, or the like.
(3) Terminal Block Block The terminal block 230 is disposed on the upper surface 211e of the mounting member 211, and includes a terminal block 231 and a mounting bracket 232 as main components. The terminal block 231 is connected to wiring (not shown) led out from the back of the ceiling to the indoor side (lower side) through the ceiling material 1 (see FIG. 3). In addition, the wiring 2 led out from the power supply unit 220 is connected. Thereby, the LED 212b is electrically connected to the wiring behind the ceiling via the power supply unit 220 and the terminal block 230. The terminal block 231 is fixed to the upper surface 211 e of the mounting member 211 by the mounting bracket 232. The terminal block 231 and the mounting bracket 232 are fixed to the upper surface 211e of the mounting member 211 using an engagement structure, screwing, an adhesive, or the like. The mounting bracket 232 to which the terminal block 231 is mounted may be fixed to the mounting member 211. Further, the terminal block 231 may be fixed to the mounting member 211 by mounting the mounting bracket 232 to the mounting member 211 so as to press down a part of the terminal block 231.

(4) Appliance main body The appliance main body 110 is formed by bending a sheet metal, and has a long shape similar to a lighting fixture to which a so-called straight tube fluorescent lamp is attached. The light emitting unit 200 is attached to the lower part of the instrument main body 110 (the side opposite to the side attached to the ceiling material). That is, the light emitting unit 200 is held on the lower side by the instrument main body 110.

  The lower part of the instrument main body 110 is opened downward (dented upward) over substantially the entire width in the longitudinal direction (X-axis direction in FIGS. 1A, 1B, and 2). An accommodation recess 111 which is a long recess is formed. In a state where the light emitting unit 200 is attached to the lighting apparatus 100, at least a part of the power supply case 222 is located in the accommodation recess 111, and the opening of the accommodation recess 111 is closed by the attachment member 211. On both sides of the housing recess 111 in the short direction (the Y-axis direction in FIGS. 1 (a), 1 (b), and 2), there are inclined surfaces 112 that incline in a direction approaching upward as they move away from the housing recess 111. Is formed. End caps 113 are respectively attached to both ends of the instrument body 110 in the longitudinal direction, so that the shape of the instrument body 110 is maintained.

  An inner surface 111a that is a recessed surface of the housing recess 111 has an upper inner surface 111a1 that is flat in the horizontal direction (the direction perpendicular to the vertical direction and along the XY plane in FIGS. 1 and 2), and the vertical direction. And a flat side inner surface 111a2. The upper inner surface 111a1 is formed with a plurality of wiring holes 114 (three in the first embodiment) which are through holes for passing wiring from the back of the ceiling. In addition, the upper inner surface 111a1 has a plurality of fixing holes 115 (through holes in the first embodiment) that are through holes for passing a fixing tool (for example, a suspension bolt) for fixing the lighting device 10 to a ceiling material or the like. 2).

(5) Cover member The cover member 120 has a bottomed rectangular tube shape with the lower end opened and the upper end closed, and is formed of a material having good thermal conductivity. Examples of the thermally conductive material from which the cover member 120 is formed include metals and thermally conductive resins. As the metal, for example, aluminum or stainless steel can be used. The cover member 120 includes a cover member upper plate portion 121 corresponding to the upper bottom of the square tube, a pair of cover member side plate portions 122 corresponding to the short cylindrical wall, and a pair of cover members corresponding to the long cylindrical wall. A side plate portion 123 is provided.

  The cover member 120 is fixed to the upper inner surface 111 a 1 of the housing recess 111 in a state where the cover member 120 is entirely housed in the housing recess 111. More specifically, the outer upper surface 121b of the cover member upper plate portion 121 of the cover member 120 is fixed by screwing or the like while being in contact with the upper inner surface 111a1 of the housing recess 111. Note that the cover member 120 may be fixed to the upper inner surface 111a1 using a heat conductive adhesive. In other words, the cover member 120 only needs to be fixed in a state where it is thermally connected to the upper inner surface 111a1 of the housing recess 111. Hereinafter, the fixing of the cover member to the inner surface of the housing recess is the same in the second embodiment and the modifications.

  The cover member side plate portions 122 and 123 of the cover member 120 and the power supply case side plate portions 222b and 222c of the power supply case 222 are respectively disposed along the vertical direction. The size of the inside of the square cylinder of the cover member 120 corresponds to the size of the power supply case 222. That is, the lengths of the cover member side plate portion 122 and the cover member side plate portion 123 in the longitudinal direction and the short direction are defined so that the power supply case 222 is just inside the rectangular tube of the cover member 120. Further, the cover member 120 and the power supply unit 220 are arranged at positions corresponding to each other. That is, in a state in which the light emitting unit 200 is attached to the lighting fixture 100, the power supply unit 220 is in a state of being fitted into the cylinder of the cover member 120 (see FIG. 3).

Note that a wiring notch 123 b is formed in the cover member side plate portion 123 of the cover member 120 at a position corresponding to the wiring notch 222 c 2 of the power supply case 222. Thereby, even when the power supply unit 220 is fitted to the cover member 120, the wiring 2 can be led out through the wiring cutout 222c2 and the wiring cutout 123b.
[3. Heat dissipation from power supply]
3 is a cross-sectional view of the illumination device 10 taken along the line AA in FIG. As shown in FIG. 3, in a state where the light emitting unit 200 is attached to the lighting fixture 100, the outer side surface 222 b 1 of the power supply case side plate portion 222 b of the power supply case 222 is connected to the inner side surface 122 a of the cover member side plate portion 122 of the cover member 120. Surface contact. Although not shown in the cross-sectional view of FIG. 3, the power supply unit 220 is fitted in the cylinder of the cover member 120, and the outer surface 222 c 1 of the power supply case side plate portion 222 c of the power supply case 222 is covered with the cover of the cover member 120. The inner side surface 123a of the member side plate portion 123 is in surface contact. In other words, in the lighting device 10 according to the first embodiment, the four inner surfaces of the cover member 120 (each of the pair of inner surfaces 122a and 123a) are the four outer surfaces of the power supply case 222 of the power supply unit 220 (each of the pair of outer surfaces). The side surfaces 222b1 and 222c1) are in surface contact with each other. As a result, heat generated in the power supply unit 220 (more precisely, the electronic component 221b) is easily transferred from the power supply case 222 to the cover member 120, so that the heat dissipation of the power supply unit 220 is improved and the power supply unit 220 is excessively heated. Temperature rise can be suppressed.

  Also, as shown in FIG. 3, a space is provided between the outer upper surface 222a1 of the power supply case upper plate portion 222a of the power supply case 222 and the inner upper surface 121a of the cover member upper plate portion 121 of the cover member 120. The outer upper surface 222a1 and the inner upper surface 121a are not in contact with each other. Thereby, for example, the following effects can be obtained when the lighting device 10 is used in a building that is routinely affected by ground vibration, such as a house along a route. That is, when the building vibrates with the vibration of the ground when passing by the train and the lighting device 10 vibrates, the outer upper surface 222a1 of the power supply case 222 and the inner upper surface 121a of the cover member 120 collide with each other. Generation of collision sound can be prevented.

  Further, the lower ends of the cover member side plate portions 122 and 123 of the cover member 120 (only the lower end 122c of the cover member side plate portion 122 is shown in FIG. 3) are in contact with the upper surface 211e of the mounting member 211. Both are separated. Also by this, similarly to the above, it is possible to prevent unpleasant collision noise caused by collision between the lower ends of the cover member side plate portions 122 and 123 and the upper surface 211e of the mounting member 211 due to vibration.

The attachment of the light emitting unit 200 to the lighting fixture 100 is not particularly limited, and is performed using, for example, screwing, an engagement structure, an adhesive, or the like. When the light emitting unit 200 is attached to the lighting fixture 100, the opening of the housing recess 111 is closed by the attachment member 211.
[4. Summary of Embodiment 1]
As described above, the lighting device 10 according to the first embodiment which is an aspect of the present invention can be summarized as follows. That is, the illuminating device 10 according to Embodiment 1 which is one embodiment of the present invention is the illuminating device 10 including the light emitting unit 200 and the luminaire 100 that holds the light emitting unit 200. The light emitting unit 200 includes a semiconductor light emitting element (LED) 212b and a power supply unit 220 that supplies power for lighting the semiconductor light emitting element 212b to the semiconductor light emitting element 212b. When the main emission direction of light from the semiconductor light emitting element 212b is downward, the luminaire 100 has a housing recess 111 that opens downward and thermal conductivity, and is in thermal connection with the inner surface 111a of the housing recess 111. A fixed cover member 120. The light emitting unit 200 further includes a plate-like attachment member 211 that is attached to the lower side of the lighting fixture 100 and closes the opening of the housing recess 111. The power supply unit 220 includes a power supply substrate 221 that converts commercial power into power for lighting the semiconductor light emitting element 212b, and a power supply case 222 that constitutes an outline of the power supply unit 220 and accommodates the power supply substrate 221 therein. The semiconductor light emitting element 212 b is fixed to the lower surface (bottom surface) 211 a of the mounting member 211, and the power supply case 222 is fixed to the upper surface 211 e of the mounting member 211. In a state where the light emitting unit 200 is held by the lighting fixture 100, at least a part of the power supply case 222 is located in the housing recess 111, and the cover member 120 is in surface contact with the power supply case 222 in the housing recess 111. .

  Since the power supply case 222 and the cover member 120 are in surface contact, the heat generated on the power supply board 221 of the power supply unit 220 is easily transferred from the power supply case 222 to the cover member 120. Since the cover member 120 has thermal conductivity and is fixed in a thermally connected state on the inner surface 111a of the housing recess 111, the heat transmitted from the power supply case 222 to the cover member 120 is further transferred to the instrument body 110. Radiated from there to the ceiling material 1 and the like. Thereby, the heat dissipation of the power supply part 220 can be improved and the excessive temperature rise of the power supply part 220 can be suppressed. And the influence which the heat which generate | occur | produced in the power supply part 220 has on LED212b can be reduced.

  In addition, in the illuminating device 10 which concerns on this embodiment, it is not necessarily restricted to the case where the whole side surface (the whole outer surface of the power supply case side plate part) of the power supply case 222 of the power supply part 220 is in surface contact with the cover member 120. For example, as shown in FIG. 3, in the lighting device 10, the space between the outer upper surface 222 a 1 of the power supply case 222 and the inner upper surface 121 a of the cover member 120, the lower end of the side plate portion of the cover member 120, and the upper surface 211 e of the mounting member 211. There is a gap between the two. (In FIG. 3, only the lower end 122c of the cover member side plate portion 122 is shown.) For this reason, the portion provided with the gap is not in surface contact. On the other hand, as the gap is increased, the area of surface contact becomes very small and becomes close to line contact. Therefore, here, it is considered that sufficient thermal conductivity can be ensured if surface contact is achieved in an area of 30% or more of the maximum surface contact, and it is treated as surface contact. Hereinafter, the same applies to Embodiment 2 and each modification.

<< Embodiment 2 >>
In the first embodiment, the configuration in which the four side surfaces of the power supply case 222 are in surface contact with the cover member 120 has been described. However, it is not limited to this.
For example, depending on the method of attaching the light emitting unit to the lighting fixture, it may be difficult for all four side surfaces of the power supply cover to be in surface contact with the cover member.

  FIG. 4 is a perspective view illustrating a state where the lighting apparatus 1100 and the light emitting unit 1200 are separated from each other and the cover member 1120 is removed from the apparatus main body 1110 in the lighting apparatus 1000 according to the second embodiment. As shown in the figure, the light emitting unit 1200 has a plurality of engaging claws 1240 (three in the second embodiment) on one side edge portion 1211d along the longitudinal direction of the mounting member 1211. . And the instrument main body 1110 has the engagement hole 1116 which is a through-hole in the position corresponding to each of the some engaging claw 1240 in the side inner surface 1111a2 of the inner surface 1111a of the accommodating recessed part 1111. FIG.

  When the outer upper surface 1121 b is fixed to the upper inner surface 1111 a 1 of the housing recess 1111, the cover member 1120 has only a cover member side plate portion 1122 on the same side as the engagement hole 1116, and a cover on the opposite side to the engagement hole 1116. The member side plate portion is not provided. Except for the difference from the cover member 120 according to the first embodiment, the cover member 1120 has the same basic configuration as the cover member 120 except for the cover member upper plate portion 1121 and the pair of the cover member 1120. The cover member side plate portion 1123 is provided. The cover member side plate portion 1123 has a wiring cutout 1123b. The cover member 1120 is made of a material having good heat conductivity such as a metal such as aluminum or stainless steel or a heat conductive resin, and is thermally connected to the upper inner surface 1111a1 of the housing recess 1111 of the instrument main body 1110. It is fixed with.

The instrument main body 1110 is the same as the instrument main body 110 except that the instrument main body 1110 is different from the instrument main body 110 according to the first embodiment in that it has an engagement hole 1116.
The lighting fixture 1100 includes a fixture body 1110 and a cover member 1120 as main components.
The attachment member 1211 has the same basic configuration as the attachment member 211 according to the first embodiment, except that the side edge portion 1211d has an engaging claw 1240. The light source unit 1210 includes a mounting member 1211, an LED substrate 212, a front cover 213, and the like as main components. The light emitting unit 1200 includes a light source unit 1210, a power source unit 220, and a terminal block block 230 as main components. 4 and 5A, 5B, and 5C, the upper side of the attachment member 1211 and the front cover 213 is represented as a flat surface for the sake of simplicity.

  FIGS. 5A, 5 </ b> B, and 5 </ b> C are cross-sectional views illustrating how the light emitting unit 1200 is attached to the lighting fixture 1100. FIG. 5A is a cross-sectional view showing a state in which the engaging claw 1240 is inserted into the engaging hole 1116 of the lighting apparatus 1100. FIG. 5B is a cross-sectional view illustrating a state in which a part of the power supply unit 220 is housed in the housing recess 1111 of the lighting fixture 1100. FIG. 5C is a cross-sectional view illustrating a state in which the light emitting unit 1200 is completely attached to the lighting fixture 1100. 5A, 5B, and 5C, the power source unit 220 is shown as a single member, the cross section is shown, and the specific internal configuration is omitted. Therefore, the power supply case 222 is not illustrated, but the upper surface and the side surface of the power supply unit as a lump are denoted as the outer upper surface and the outer surface of the power supply case, respectively. Hereinafter, also in each modification, it is the same about illustration of the section of a power supply part, and the code notation of the side of a power supply part.

  As shown in FIGS. 5A, 5 </ b> B, and 5 </ b> C, in the lighting device according to the present embodiment, the light emitting unit 1200 is rotated by rotating the light emitting unit 1200 around the engaging claw 1240 and the engaging hole 1116. Is attached to the luminaire 1100. At this time, since the cover member 1120 does not have a side plate portion on the side opposite to the engagement hole 1116 (the side far from the engagement hole 1116), the power supply unit 220 causes the cover member 1120 to rotate when the light emitting unit 1200 is rotated. Don't hit. When the attachment of the light emitting unit 1200 to the luminaire 1100 is completed, the power supply unit 220 (more precisely, the power supply case 222 of the power supply unit 220) is attached to the cover member 1120 as shown in FIG. The inner side surface 1122a of the member side plate portion 1122 and the inner side surface 1123a of the pair of cover member side plate portions 1123 are in surface contact. That is, the three side surfaces of the power supply unit 220 and the cover member 1120 are in surface contact. That is, in the illumination device 1000 according to the second embodiment, the three inner side surfaces (the inner side surface 1122a and the pair of inner side surfaces 1123a) of the cover member 1120 are in surface contact with the power supply case 222 of the power supply unit 220.

  Even with the configuration of the lighting apparatus 1000 according to the second embodiment, the power supply unit 220 and the cover member 1120 are in surface contact, and thus heat generated in the power supply unit 220 is easily transmitted to the cover member 1120. Since the cover member 1120 has thermal conductivity and is fixed in a thermally connected state on the inner surface 1111a of the housing recess 1111, the heat transmitted from the power supply unit 220 to the cover member 1120 is further transferred to the instrument body 1110. The heat is transmitted to the ceiling material 1 and the like. Thereby, the heat dissipation of the power supply part 220 can be improved and the excessive temperature rise of the power supply part 220 can be suppressed. And the influence which the heat which generate | occur | produced in the power supply part 220 has on LED212b can be reduced.

In the light emitting unit 1200, fixing to the lighting fixture 1100 opposite to the engaging claw 1240 is not particularly limited, but screwing, an engaging structure, an adhesive, or the like can be used.
Also in the illumination device 1000 according to the present embodiment, the outer upper surface 222a1 of the power supply unit 220 and the inner upper surface 1121a of the cover member 1120 are not in contact with each other, and there is a gap between the two. The lower end 1122c of the cover member side plate portion 1122 and the lower end 1123c of the cover member side plate portion 1123 of the cover member 1120 are not in contact with the upper surface 1211e of the mounting member 1211, and both are separated from each other. Thus, as in the case of the first embodiment, also in the configuration of the lighting apparatus 1000 according to the second embodiment, the collision sound between the outer upper surface 222a1 and the inner upper surface 1121a due to vibration and the collision between the lower ends 1122c, 1123c and the upper surface 1211e. Generation of sound can be prevented.

In the present embodiment, the engagement hole 1116 is a through hole, but is not limited thereto, and may be, for example, a recess. Moreover, it is not restricted to the engaging structure by an engaging claw and an engaging hole (or engaging recessed part), The structure provided with the axis | shaft and the bearing may be sufficient. In short, the form of the engagement structure is not particularly limited as long as the hinge function can be achieved.
≪Modification≫
As mentioned above, although the structure of this invention was demonstrated based on Embodiment 1 and 2, this invention is not limited to said each embodiment. For example, the following modifications can be implemented.

(Modification 1)
In the first embodiment, the configuration in which the four outer surfaces of the power supply case 222 are in surface contact with the cover member 120 has been described. In the second embodiment, the configuration in which the three side surfaces of the power supply case 222 are in surface contact with the cover member 1120 has been described. However, it is not limited to these. There may be two side surfaces of the power supply case 222 in surface contact with the cover member.

  FIG. 6A is a perspective view showing a state in which the lighting apparatus 2100 and the light emitting unit 200 are separated and the cover member 2120 is removed from the apparatus main body 110 in the lighting apparatus 2000 according to the first modification. As shown in the figure, the cover member 2120 according to Modification 1 includes only a cover member upper plate portion 2121 and a pair of cover member side plate portions 2122. That is, the cover member 2120 has a configuration in which both cover member side plate portions 123 are omitted from the cover member 120 according to the first embodiment. Similarly to the cover members 120 and 1120, the cover member 2120 is formed of a material having good thermal conductivity such as a metal such as aluminum or stainless steel or a heat conductive resin. And the cover member 2120 is being fixed in the state thermally connected to the upper inner surface 111a1 of the accommodation recessed part 111 of the instrument main body 110. FIG. The lighting fixture 2100 includes a fixture main body 110 and a cover member 2120 as main components.

  In a state where the light emitting unit 200 is attached to the lighting fixture 2100, two side surfaces along the longitudinal direction of the power supply unit 220 (more precisely, two outer side surfaces 222b1 along the longitudinal direction of the power supply case 222) are cover members. The two side surfaces 2122a of the pair of cover member side plates 2122 of the 2120 are in surface contact with each other. Therefore, the heat generated in the power supply unit 220 is easily transmitted to the cover member 2120 even in the configuration of the lighting device 2000 according to the first modification. Since the cover member 2120 has thermal conductivity and is fixed in a thermally connected state on the inner surface 111 a of the housing recess 111, the heat transmitted from the power supply unit 220 to the cover member 2120 is further transferred to the instrument body 110. The heat is transmitted to the ceiling material 1 and the like. Thereby, the heat dissipation of the power supply part 220 can be improved and the excessive temperature rise of the power supply part 220 can be suppressed. And the influence which the heat which generate | occur | produced in the power supply part 220 has on LED212b can be reduced.

(Modification 2)
In the modification 1, although the cover member 2120 demonstrated the structure which has a pair of cover member side-plate part 2122 along a longitudinal direction, it is not restricted to this.
FIG. 6B is a perspective view showing a state in which the lighting apparatus 3100 and the light emitting unit 200 are separated from each other and the cover member 3120 is removed from the apparatus main body 110 in the lighting apparatus 3000 according to the second modification. As shown in the figure, the cover member 3120 according to the modified example 2 includes only a cover member upper plate portion 3121 and a pair of cover member side plate portions 3123. That is, the cover member 3120 has a configuration in which the cover member side plate portions 122 are omitted from the cover member 120 according to the first embodiment. Similarly to the cover members 120, 1120, and 2120, the cover member 3120 is also formed of a material having good thermal conductivity such as a metal such as aluminum or stainless steel or a heat conductive resin. The cover member side plate portion 3123 has a wiring cutout 3123b. And the cover member 3120 is being fixed in the state thermally connected to the upper inner surface 111a1 of the accommodation recessed part 111 of the instrument main body 110. FIG. The lighting fixture 3100 includes a fixture main body 110 and a cover member 3120 as main components.

  In a state where the light emitting unit 200 is attached to the lighting fixture 3100, two side surfaces (the outer surface 222 c 1 of the power supply case 222) along the short direction of the power supply unit 220 are in surface contact with the cover member side plate portion 3123 of the cover member 3120. ing. Therefore, the heat generated in the power supply unit 220 is easily transmitted to the cover member 3120 even with the configuration of the illumination device 3000 according to the second modification. Since the cover member 3120 has thermal conductivity and is fixed in a thermally connected state on the inner surface 111 a of the housing recess 111, the heat transmitted from the power supply unit 220 to the cover member 3120 is further transferred to the instrument body 110. The heat is transmitted to the ceiling material 1 and the like. Thereby, the heat dissipation of the power supply part 220 can be improved and the excessive temperature rise of the power supply part 220 can be suppressed. And the influence which the heat which generate | occur | produced in the power supply part 220 has on LED212b can be reduced.

(Modification 3)
In the first and second modifications, the two opposing side surfaces of the power supply case 222 (power supply unit 220) are in surface contact with the cover member. However, it is not limited to this.
FIG. 7A is a perspective view showing a state where the lighting apparatus 4100 and the light emitting unit 200 are separated from each other and the cover member 4120 is removed from the apparatus main body 110 in the lighting apparatus 4000 according to the third modification. As shown in the figure, the cover member 4120 according to the modified example 3 includes a cover member upper plate portion 4121 and cover member side plate portions 4122 and 4123, respectively. That is, the cover member 4120 has a configuration in which the cover member side plate portions 122 and 123 are omitted from the cover member 120 according to the first embodiment. Similarly to the cover members 120, 1120, 2120, and 3120, the cover member 4120 is formed of a material having good thermal conductivity such as a metal such as aluminum or stainless steel or a heat conductive resin. The cover member side plate portion 4123 has a wiring cutout 4123b. And the cover member 4120 is being fixed in the state thermally connected to the upper inner surface 111a1 of the accommodation recessed part 111 of the instrument main body 110. FIG. The lighting fixture 4100 includes a fixture body 110 and a cover member 4120 as main components.

  In a state where the light emitting unit 200 is attached to the luminaire 4100, one of the side surfaces (the outer surface 222c1 of the power supply case 222) along the short direction of the power supply unit 220 and the side surface (the outside of the power supply case 222) along the longitudinal direction. One of the side surfaces 222b1) is in surface contact with the cover member side plate portions 4123 and 4122 of the cover member 4120, respectively. Therefore, the heat generated in the power supply unit 220 is easily transmitted to the cover member 4120 even with the configuration of the lighting device 4000 according to the third modification. Since the cover member 4120 has thermal conductivity and is fixed in a thermally connected state on the inner surface 111a of the housing recess 111, the heat transmitted from the power supply unit 220 to the cover member 4120 is further transferred to the instrument body 110. The heat is transmitted to the ceiling material 1 and the like. Thereby, the heat dissipation of the power supply part 220 can be improved and the excessive temperature rise of the power supply part 220 can be suppressed. And the influence which the heat which generate | occur | produced in the power supply part 220 has on LED212b can be reduced.

Further, the cover member side plate portions 4122 and 4123 included in the cover member 4120 do not necessarily have to be the side shown in FIG. Only the cover member side plate portions 4122 and 4123 opposite to the side shown in FIG. 7A may be provided.
(Modification 4)
Furthermore, the side surface of the power supply case that is in surface contact with the cover member is not limited to a plurality, and only one side surface may be in surface contact with the cover member.

  FIG. 7B is a perspective view showing a state in which the lighting apparatus 5100 and the light emitting unit 200 are separated from each other and the cover member 5120 is removed from the apparatus main body 110 in the lighting apparatus 5000 according to the fourth modification. As shown in the figure, the cover member 5120 according to the modified example 3 has only one cover member upper plate portion 5121 and one cover member side plate portion 5122. That is, the cover member 5120 has a configuration in which one of the cover member side plate portions 122 and both the cover member side plate portions 123 are omitted from the cover member 120 according to the first embodiment. The cover member 5120 is also made of a material having good thermal conductivity such as a metal such as aluminum or stainless steel or a heat conductive resin, like the cover members 120, 1120, 2120, 3120, 4120. And the cover member 5120 is being fixed in the state thermally connected to the upper inner surface 111a1 of the accommodation recessed part 111 of the instrument main body 110. FIG. The lighting fixture 5100 has the fixture main body 110 and the cover member 5120 as main components.

  In a state where the light emitting unit 200 is attached to the lighting fixture 5100, one of the side surfaces (the outer surface 222 b 1 of the power supply case 222) along the longitudinal direction of the power supply unit 220 is in surface contact with the cover member side plate portion 5122 of the cover member 5120. ing. Therefore, the heat generated in the power supply unit 220 is easily transmitted to the cover member 5120 even with the configuration of the illumination device 5000 according to the fourth modification. Since the cover member 5120 has thermal conductivity and is fixed in a thermally connected state on the inner surface 111 a of the housing recess 111, the heat transmitted from the power supply unit 220 to the cover member 5120 is further transferred to the instrument body 110. The heat is transmitted to the ceiling material 1 and the like. Thereby, the heat dissipation of the power supply part 220 can be improved and the excessive temperature rise of the power supply part 220 can be suppressed. And the influence which the heat which generate | occur | produced in the power supply part 220 has on LED212b can be reduced.

Further, the side plate portion of the cover member 5120 is not limited to that shown in FIG. 7B may be the cover member side plate portion 5122 on the side opposite to the side shown in FIG. 7B (the front side in FIG. 7B), or the side plate portion along the short direction (the cover according to the first embodiment). Any one of the cover member side plate portions 123 of the member 120).
(Modification 5)
For example, in the case of the cover member 2120 according to Modification 1 shown in FIG. 6, when the light emitting unit 200 is attached to the lighting fixture 2100 and the power supply unit 220 is sandwiched between both cover member side plate portions 2122, If there is a gap between the cover member side plate portion 2122 and the power supply unit 220, sufficient surface contact cannot be achieved. Therefore, in order to achieve firm surface contact, it is preferable that both cover member side plate portions 2122 are slightly urged in the direction (inner side) sandwiching the power supply unit 220. Therefore, the following modifications can be considered.

  FIGS. 8A, 8 </ b> B, and 8 </ b> C are cross-sectional views illustrating a state in which the light emitting unit 200 is attached to the lighting fixture 6100 in the lighting device 6000 according to the fifth modification. FIG. 8A is a cross-sectional view showing a state before the light emitting unit 200 is attached to the lighting fixture 6100. FIG. 8B is a cross-sectional view showing a state where the light emitting unit 200 is being attached to the lighting fixture 6100. FIG. 8C is a cross-sectional view showing a state where the attachment of the light emitting unit 200 to the lighting fixture 6100 is completed. The luminaire 6100 includes a luminaire 110 and a cover member 6120 as main components. The cover member 6120 has a cover member upper plate portion 6121 and a pair of cover member side plate portions 6122, and is fixed in a state where the outer upper surface 6121b of the cover member upper plate portion 6121 is in contact with the upper inner surface 111a1 of the housing recess 111. .

  As shown in FIG. 8A, in a state where the light emitting unit 200 is not attached to the lighting fixture 110, the interval between the cover member side plate portions 6122 of the cover member 6120 is slightly narrower than the width W of the power supply unit 220. It has become. Therefore, when the light emitting unit 200 is attached to the lighting fixture 110, the power supply unit 220 is inserted between the cover member side plate portions 6122 so as to spread the cover member side plate portions 6122. At this time, if the interval between the lower end regions 6122b of the cover member side plate portion 6122 is smaller than W, the outer upper surface 222a1 of the power source portion 220 collides with the lower end region 6122b, and the power source portion 220 is inserted between the cover member side plate portions 6122. Can not do it. Therefore, in the cover member 6120 according to this modification, the lower end region 6122b is curved outward, and the interval between the lower end regions 6122b is slightly wider than W. Thereby, as shown in FIG.8 (b), the power supply part 220 can be smoothly inserted between the both cover member side-plate parts 6122 from the downward direction. Then, as shown in FIG. 8C, when the light emitting unit 200 is attached to the luminaire 110, the cover member side plate portion 6122 is attached to the cover member side plate portion 6122 to return to the inner side by the extent of being spread outward. The force acts so that the inner side surface 6122a of the cover member side plate portion 6122 can come into close contact with the outer side surface 222b1 of the power supply unit 220.

  However, at this time, since the lower end region 6122b is curved outward, a part of the lower end side of the cover member side plate portion 6122 including the lower end region 6122b is not in contact with the outer side surface 222b1 of the power supply unit 220. Here, the length in the vertical direction of the outer surface 222b1 of the power supply unit 220 (the power supply case 222) is L1, and the length in the vertical direction of the portion in surface contact with the inner surface 6122a of the outer surface 222b1 is L2. If L2 is at least 30% or more of L1, it can be considered that the surface is in contact, and the heat from the power supply unit 220 can be sufficiently transferred to the cover member 6120.

  In the illumination device 6000 according to the present modification, there is a gap between the outer upper surface 222a1 of the power supply unit 220 and the inner upper surface 6121a of the cover member 6120, and both are not in contact with each other. Further, the lower end region 6122b of the cover member 6120 is not in contact with the upper surface 211e of the attachment member 211 (see FIG. 1C). Thereby, it is possible to prevent a collision sound generated by the collision between the outer upper surface 222a1 and the inner upper surface 6121a due to vibration and the collision sound generated by the collision between the lower end region 6122b and the upper surface 211e.

(Modification 6)
In each said embodiment and each modification, although the cover member was being fixed in the state thermally connected to the upper inner surface of the accommodation recessed part, it is not restricted to this.
FIG. 9A is a perspective view showing a state in which the lighting fixture 7100 and the light emitting unit 7200 are separated from each other and the cover member 120 is removed from the fixture main body 110 in the lighting device 7000 according to the modified example 6. FIG. 9B is a cross-sectional view of the lighting device 7000 along the short direction.

As shown in FIG. 7B, the cover member 120 has one outer surface 122b accommodated in addition to the outer upper surface 121b being in contact (thermally connected) with the upper inner surface 111a1 of the accommodating recess 111. The concave portion 111 is fixed in contact with (thermally connected to) one inner surface 111a2.
According to the configuration of the lighting device 7000 according to this modification, the contact area between the cover member 120 and the instrument main body 110 can be further increased. Therefore, the heat transferred from the power supply unit 220 to the cover member 120 is more easily transferred to the instrument body 110 having a larger heat capacity, and the heat dissipation of the power supply unit 220 can be further improved.

  Note that the cover member 120 in this modification has the shape, material, and the like, except that the cover member 120 is disposed at a position close to the side inner surface 111a2 so that the outer surface 122b contacts the side inner surface 111a2. 1 is the same as the cover member 120 according to FIG. The lighting fixture 7100 has the same basic configuration as the lighting fixture 100 according to the first embodiment except that the position where the cover member 120 is arranged is different as described above. The light emitting unit 7200 has a basic configuration according to the first embodiment except that the power supply unit 220 is disposed at a position corresponding to the cover member 120 disposed at a position close to the side inner surface 111a2. This is the same as the light emitting unit 200.

  Also in the illumination device 7000 in the present modification, the outer upper surface 222a1 of the power supply unit 220 and the inner upper surface 121a of the cover member 120 are not in contact with each other, and a gap exists between the two. The lower end 122c of the cover member side plate portion 122 and the lower end 123c of the cover member side plate portion 123 of the cover member 120 are not in contact with the upper surface 211e of the mounting member 211, and are separated from each other. Thereby, similarly to the case of the first embodiment, also in the configuration of the lighting device 7000 according to the modified example 6, the collision sound between the outer upper surface 222a1 and the inner upper surface 1121a due to vibration and the collision between the lower ends 122c, 123c and the upper surface 211e. Generation of sound can be prevented.

(Modification 7)
In the sixth modification, the cover member 120 fixed in contact with the side inner surface 111a2 of the housing recess 111 is in surface contact with the four side surfaces of the power supply unit 220, but is not limited thereto. In Modification 7, a configuration in which the cover member fixed in contact with the side inner surface 111a2 of the housing recess 111 is in surface contact with the three side surfaces of the power supply unit will be described below.

  FIG. 10A is a perspective view showing a state in which the lighting fixture 8100 and the light emitting unit 7200 are separated from each other and the cover member 8120 is removed from the fixture main body 110 in the lighting device 8000 according to the modified example 7. FIG. 9B is a cross-sectional view of the lighting device 8000 along the short direction. As shown in FIG. 10A, the cover member 8120 has a cover member upper plate portion 8121, one cover member side plate portion 8122, and a pair of cover member side plate portions 8123.

As shown in FIG. 10B, the cover member 8120 has the outer upper surface 8121b in contact (thermally connected) with the upper inner surface 111a1 of the housing recess 111, and the outer surface 8122b has the housing recess 111. The side inner surface 111a2 is fixed in contact (thermally connected).
Also with the configuration of the illumination device 8000 according to the present modification, the contact area between the cover member 8120 and the instrument main body 110 can be further increased as in the case of the illumination device 7000 according to the modification 6. Therefore, the heat transferred from the power supply unit 220 to the cover member 8120 is more easily transferred to the instrument body 110 having a larger heat capacity, and the heat dissipation of the power supply unit 220 can be further improved.

  Note that the cover member 8120 in this modification has only one cover member side plate portion 8122, and the portion where the cover member side plate portion 8122 does not exist is open, and the wiring 2 can be led out from the opening. it can. For this reason, the cover member side plate portion 8123 is not provided with a wiring cutout. The cover member 8120 is formed except that the notch for wiring is not provided and the cover member 8120 is disposed at a position close to the side inner surface 111a2 so that the outer surface 8122b contacts the side inner surface 111a2. The material and the basic configuration are the same as those of the cover member 1120 according to the second embodiment.

  Also in the lighting device 8000 in this modification, the outer upper surface 222a1 of the power supply unit 220 and the inner upper surface 8121a of the cover member 8120 are not in contact with each other, and there is a gap between them. The lower end 8122c of the cover member side plate portion 8122 and the lower end 8123c of the cover member side plate portion 8123 of the cover member 8120 are not in contact with the upper surface 211e of the mounting member 211, and are separated from each other. Thereby, similarly to the case of the first embodiment, also in the configuration of the lighting device 8000 according to the modified example 7, the collision sound between the outer upper surface 222a1 and the inner upper surface 8121a due to vibration and the collision between the lower ends 8122c and 8123c and the upper surface 211e. Generation of sound can be prevented.

(Modification 8)
In the sixth modification, the cover member 120 fixed in contact with the side inner surface 111 a 2 of the housing recess 111 is in surface contact with the four side surfaces of the power supply unit 220. In the modified example 7, the cover member 8120 that is fixed in contact with the side inner surface 111a2 of the housing recess 111 is in surface contact with the three side surfaces of the power supply unit 220. However, it is not limited to these.

In the modification 8, the structure which the cover member fixed in the state which contacted the side inner surface 111a2 of the accommodation recessed part 111 surface-contacts with the two side surfaces of a power supply part is demonstrated below.
FIG. 11A is a perspective view showing a state in which the lighting apparatus 9100 and the light emitting unit 7200 are separated from each other and the cover member 9120 is removed from the apparatus main body 110 in the lighting apparatus 9000 according to the modified example 8. FIG. 11B is a cross-sectional view of the lighting device 9000 along the short direction.

As shown in FIG. 11A, the cover member 9120 has one cover member side plate portion 9122 and a pair of cover member side plate portions 9123. As shown in FIG. 11B, the cover member 9120 is fixed with the outer side surface 9122b coming into contact (thermally connected) with the side inner surface 111a2 of the housing recess 111.
In the configuration of the illumination device 9000 according to the present modification, the inner side surface 9122a of the cover member 9120 is in contact with the outer side surface 222b1 of the power supply unit 220 (power supply case 222). Both inner side surfaces 9123a of the cover member 9120 are in contact with both outer side surfaces 222c1 (see FIG. 2) of the power supply unit 220 (power supply case 222). That is, the cover member 9120 is in surface contact with the three side surfaces of the power supply unit 220. Therefore, the heat generated in the power supply unit 220 is easily transmitted to the cover member 9120. Then, the heat transmitted from the power supply unit 220 to the cover member 9120 is further transmitted to the appliance main body 110, and is radiated from there to the ceiling material 1 and the like. Thereby, the heat dissipation of the power supply part 220 can be improved and the excessive temperature rise of the power supply part 220 can be suppressed.

  Further, in the lighting device 9000 in the present modification, the outer upper surface 222a1 of the power supply unit 220, the upper end 9122d of the cover member side plate portion 9122, the upper end 9123d of the cover member side plate portion 9123, and the upper inner surface 111a1 of the housing recess 111 are in contact. There is no gap between them and the upper inner surface 111a1. The lower end 9122c of the cover member side plate portion 9122 and the lower end 9123c of the cover member side plate portion 9123 are not in contact with the upper surface 211e of the attachment member 211, and both are separated. Thereby, also in the configuration of the lighting device 9000 according to the present modification, the generation of the collision sound between the upper inner surface 111a1 and the outer upper surface 222a1, the upper end 9122d, and the upper end 9123d and the collision sound between the upper surface 211e and the lower ends 9122c and 9123c due to vibration. Can be prevented.

(Modification 9)
In each of the above embodiments and Modifications 1 to 8, the power supply case of the power supply unit has a bottomed rectangular tube shape, and the appearance of the power supply unit has a rectangular parallelepiped shape. However, it is not limited to this.
FIG. 12A is a perspective view of the lighting device 10000 according to the modified example 9 in which the lighting fixture 10100 and the light emitting unit 10200 are separated and the cover member 10120 is removed from the fixture main body 110 as viewed obliquely from below. is there. FIG. 12B is a perspective view of the light emitting unit 10200 as viewed obliquely from above. FIG. 12C is a cross-sectional view of the lighting device 10000 along the short direction.

  As shown in FIGS. 12A and 12B, the power supply unit 10220 has a cylindrical appearance. In other words, the power supply unit 10220 has a cylindrical power supply case 10222. The power supply case 10222 is fixed to the upper surface 211e of the mounting member 211 of the light emitting unit 10200 with a power supply board (not shown) accommodated therein. The power supply case 10222 is provided with two wiring cutouts 10222b2, and the wiring 2 is led out through the wiring cutouts 10222b2. The light emitting unit 10200 includes a light source unit 210, a power source unit 10220, and a terminal block 230 as main components.

  The cover member 10120 has a bottomed cylindrical shape corresponding to the shape of the power supply case 10222 of the power supply unit 10220. The outer upper surface 10121b of the cover member upper plate portion 10121 of the cover member 10120 is fixed in contact (thermally connected) with the upper inner surface 111a1 of the housing recess 111 of the instrument main body 110. The cover member 10120 is also provided with a wiring cutout 10122c at a location corresponding to the wiring cutout 10222b2 of the power supply case 10222. The lighting fixture 10100 has a fixture body 110 and a cover member 10120 as main components.

  As shown in FIG. 12C, in the state where the light emitting unit 10200 is attached to the lighting fixture 10100, the outer surface 10222b1 of the power supply unit 10220 (more precisely, the outer surface 10222b1 of the power supply case 10222) is the cover member 10120. The cover member side plate portion 10122 is in surface contact with the inner side surface 10122a. In the present modification, the power supply unit 10220 and the cover member 10120 are in surface contact over substantially the entire circumference except for the portion where the wiring cutout is provided. Accordingly, heat generated in the power supply unit 10220 is easily transmitted to the cover member 10120. Then, the heat transmitted to the cover member 10120 is further transmitted to the instrument main body 110 and is further radiated from there to the ceiling material 1 and the like. Thereby, the heat dissipation of the power supply part 10220 can be improved and the excessive temperature rise of the power supply part 10220 can be suppressed.

  Also, as shown in FIG. 12C, in the lighting device 10000 according to this modification, the outer upper surface 10222a1 of the power supply unit 10220 (more precisely, the outer upper surface 10222a1 of the power supply case 10222) and the cover member 10120 There is no contact with the upper surface 10121a, and there is a gap between them. The lower end 10122 d of the cover member side plate portion 10122 of the cover member 10120 is not in contact with the upper surface 211 e of the attachment member 211. Thereby, also in the structure of the illuminating device 10000 which concerns on this modification, generation | occurrence | production of the collision sound with the upper inner surface 111a1 and the outer upper surface 10222a1 by the vibration and the collision sound with the upper surface 211e and the lower end 10122d can be prevented.

(Modification 10)
In the modification 9, the cover member 10120 is in surface contact over substantially the entire circumference of the outer surface 10222b1 of the power supply unit 10220, but is not limited thereto.
FIG. 13A is a perspective view of the lighting device 11000 according to the modified example 10, in which the lighting fixture 11100 and the light emitting unit 11200 are separated and the cover member 11120 is removed from the fixture main body 110 as viewed obliquely from below. is there. FIG. 13B is a perspective view of the light emitting unit 11200 as viewed obliquely from above. FIG. 13C is a cross-sectional view of the lighting device 11000 along the short direction.

  As shown in FIGS. 13A and 13B, the power supply unit 11220 has a cylindrical shape. More precisely, the power supply unit 11220 has a cylindrical power supply case 11222. The power supply case 11222 is fixed to the upper surface 211e of the mounting member 211 of the light emitting unit 11200 with a power supply board (not shown) accommodated therein. The power supply case 11222 is provided with two wiring cutouts 11222b2, and the wiring 2 is led out through the wiring cutouts 11222b2. When the power source 11220 is divided into two along the longitudinal direction at the center, the basic configuration is the same as that of the modification 9 except that both of the wiring notches 11222b2 are formed at positions close to one side. This is the same as the power supply unit 10220 according to FIG. The light emitting unit 11200 includes a light source unit 210, a power supply unit 11220, and a terminal block 230 as main components.

  One side surface of the cover member 11120 along the longitudinal direction is an outer surface 11120b that is a flat surface along the longitudinal direction. The other side surface along the longitudinal direction of the cover member 11120 is an inner surface 11120a which is a concave surface corresponding to the shape of the outer surface 11222b1 of the power supply unit 11220. The outer surface 11120b of the cover member 11120 is fixed in contact with (thermally connected to) the side inner surface 111a2 of the housing recess 111 of the instrument main body 110. The lighting fixture 11100 includes a fixture main body 110 and a cover member 11120 as main components.

  As shown in FIG. 13C, in the state where the light emitting unit 11200 is attached to the lighting fixture 11100, the outer side surface 11222b1 (more precisely, the outer side surface 11222b1 of the power source case 11222) is the cover member 11120. Is in surface contact with the inner side surface 11120a. An upper end 11120 c of the cover member 11120 is separated from the upper inner surface 111 a 1 of the housing recess 111. A lower end 11120 d of the cover member 11120 is separated from the upper surface 211 e of the attachment member 211. In the present modification, when the power supply unit 11220 is divided into two equal parts in the center along the longitudinal direction, the half outer surface and the inner surface 11120a of the cover member 11120 are in surface contact. Therefore, the heat generated in the power supply unit 11220 is easily transmitted to the cover member 11120. Then, the heat transmitted to the cover member 11120 is further transmitted from the side inner surface 111a2 to the instrument main body 110, and is further radiated from there to the ceiling material 1 and the like. Thereby, the heat dissipation of the power supply part 11220 can be improved and the excessive temperature rise of the power supply part 11220 can be suppressed.

Two wiring cutouts 11222b2 are provided on the side of the power supply case 11222 that is not in surface contact with the inner surface 11120a of the cover member 11120.
As shown in FIG. 13C, in the lighting device 11000 according to this modification, the outer upper surface 11222a1 of the power supply unit 11220 (more precisely, the outer upper surface 11222a1 of the power supply case 11222) and the upper part of the housing recess 111 are provided. There is no contact with the inner surface 111a1, and there is a gap between them. The lower end 11120d of the cover member 11120 and the upper surface 211e of the attachment member 211 are not in contact with each other. Thereby, also in the structure of the illuminating device 11000 which concerns on this modification, generation | occurrence | production of the collision sound with the upper inner surface 111a1 and the outer upper surface 11222a1 by a vibration and the collision sound with the upper surface 211e and the lower end 11120d can be prevented.

(Modification 11)
In the modification 6 and the modification 7, the cover member is fixed in a state of being in contact with both the upper inner surface and the side inner surface of the housing recess, but is not limited thereto. The cover member may be fixed in contact with only the inner side surface, and may be separated from the upper inner surface.
(Modification 12)
In Modification 8 and Modification 10, the cover member is separated from the upper and inner surfaces of the housing recess, but the present invention is not limited to this. The cover member may be fixed while being in contact with both the upper inner surface and the side inner surface of the housing recess.

<Supplement>
Each of the embodiments and the modifications described above shows a preferred specific example of the present invention. The numerical values, shapes, materials, constituent elements, arrangement positions and connecting forms of the constituent elements, steps, order of steps, and the like shown in the embodiments are merely examples, and are not intended to limit the present invention. In addition, among the constituent elements in the embodiment, constituent elements that are not described in the independent claims indicating the highest concept of the present invention are described as arbitrary constituent elements that constitute a more preferable form.

In addition, in order to easily understand the invention, the scales of the constituent elements in the drawings described in the above embodiments may be different from actual ones. Each figure shown above is a schematic diagram, and is not necessarily illustrated strictly.
The present invention is not limited by the description of each of the above embodiments, and can be appropriately changed without departing from the gist of the present invention. For example, the lighting apparatus which combines suitably the partial structure of the illuminating device which concerns on Embodiment 1 and 2 and the structure which concerns on each said modification may be sufficient.

10, 1000, 2000, 3000, 4000, 5000, 6000, 7000, 8000, 9000, 10000, 11000 Lighting device 100, 1100, 2100, 3100, 4100, 5100, 6100, 7100, 8100, 9100, 10100, 11100 110 instrument body 111 housing recess 111a inner surface 111a1 upper inner surface 111a2 side inner surface 120, 1120, 2120, 3120, 4120, 5120, 6120, 8120, 9120, 10120, 11120 cover members 122, 123, 1122, 1123, 2122, 3123, 4122 , 4123, 5122 Cover member side plate portion 122a, 123a, 1122a, 1123a, 2122a, 3123a, 4122a, 4123a, 5122a, 6 22a, 8122a, 8123a, 9122a, 9123a, 10122a, 11122a inner surface 200,1200,7200,1020011200 emitting unit 211,1211 mounting member 211a bottom portion (lower surface)
211c upper surface 212b LED (semiconductor light emitting element)
220, 10220, 11220 Power supply part 221 Power supply board 222, 10222, 11222 Power supply case 222a1, 10222a1, 11222a1 Outer upper surface 222b, 222c Power supply case side plate part 222b1, 222c1, 10222b1, 11222b1 Outer surface

Claims (13)

A lighting device comprising: a light emitting unit having a semiconductor light emitting element and a power supply unit that supplies power for lighting the semiconductor light emitting element to the semiconductor light emitting element; and a lighting fixture that holds the light emitting unit,
When the main emission direction of the light from the semiconductor light emitting element is set downward,
The lighting fixture has a housing recess that opens downward, and a cover member that has thermal conductivity and is fixed to the inner surface of the housing recess in a thermally connected state.
The light emitting unit further includes a plate-like attachment member attached to the lower side of the lighting fixture and closing the opening of the housing recess,
The power supply unit includes a power supply board that converts commercial power into power for lighting the semiconductor light emitting element, and a power supply case that constitutes an outline of the power supply part and accommodates the power supply board therein,
The semiconductor light emitting element is fixed to the lower surface of the mounting member,
The power supply case is fixed to the upper surface of the mounting member,
In a state where the light emitting unit is held by the lighting fixture, at least a part of the power supply case is located in the housing recess, and the cover member is in surface contact with the power supply case in the housing recess. Lighting device. The power supply case has an upper surface and side surfaces,
The lighting device according to claim 1, wherein the cover member is in surface contact with a side surface of the power supply case and is separated from an upper surface of the power supply case. The power supply case has a rectangular cylindrical shape, and includes four flat power supply case side plate portions constituting the cylindrical wall of the rectangular cylinder,
The side surface of the power supply case is composed of an outer surface of the four power supply case side plate portions,
The lighting device according to claim 2, wherein the cover member is in surface contact with at least one of the outer surfaces of the four power supply case side plate portions. The cover member has a rectangular tube shape, and has four flat cover member side plate portions constituting the tube wall of the square tube,
In the state where the light emitting unit is attached to the lighting fixture, the power supply case is located in a rectangular tube of the cover member,
The lighting device according to claim 3, wherein inner surfaces of the four cover member side plate portions are in surface contact with outer surfaces of the four power supply case side plate portions, respectively. The cover member has three flat cover member side plate portions,
4. In a state where the light emitting unit is attached to the lighting fixture, the three cover member side plate portions are in surface contact with any one of the three outer surfaces of the four power supply case side plate portions. The lighting device described in 1. The cover member has a pair of flat cover member side plate portions,
The pair of cover member side plate portions are in surface contact with any one of two outer surfaces of the four power supply case side plate portions in a state where the light emitting unit is attached to the lighting fixture. The lighting device described in 1. The pair of cover member side plate portions of the cover member are arranged to face each other,
In a state where the light emitting unit is attached to the lighting fixture, the power supply case is located between the pair of cover member side plate portions,
The lighting device according to claim 6, wherein the pair of cover member side plate portions are in surface contact with any two of the opposing outer surfaces of the four power supply case side plate portions. The cover member has one flat cover member side plate portion,
The illumination according to claim 3, wherein the cover member side plate portion is in surface contact with any one of the outer surfaces of the four power supply case side plate portions in a state where the light emitting unit is attached to the lighting fixture. apparatus. The power supply case is cylindrical,
The cover member has an inner surface having a curved shape corresponding to a side surface of the power supply case,
The lighting device according to claim 2, wherein the inner side surface of the cover member is in surface contact with the side surface of the power supply case in a state where the light emitting unit is attached to the lighting fixture. The inner surface of the receiving recess has an upper inner surface and a side inner surface,
The lighting device according to any one of claims 1 to 9, wherein the cover member is fixed to the upper inner surface of the housing recess. The receiving recess has an upper inner surface and a side inner surface,
The lighting device according to any one of claims 1 to 10, wherein the cover member is fixed to the inner side surface of the housing recess. The lighting device according to any one of claims 1 to 11, wherein a lower end of the cover member and an upper surface of the mounting member are separated from each other. The light emitting unit and the lighting fixture have a long shape,
The illumination device according to any one of claims 1 to 12, wherein the semiconductor light emitting elements are arranged along a longitudinal direction.

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