CN110612418A

CN110612418A - Lighting device

Info

Publication number: CN110612418A
Application number: CN201880025090.6A
Authority: CN
Inventors: 笹岛润
Original assignee: Iris Ohyama Inc
Current assignee: Iris Ohyama Inc
Priority date: 2017-05-17
Filing date: 2018-05-11
Publication date: 2019-12-24
Also published as: WO2018212103A1; JP2018195459A; JP6450418B2

Abstract

The invention provides a lighting device which supports a light source unit and a circuit unit with a simple structure. The lighting device is provided with: a light source unit (2) having a light source module on the surface of a heat sink (23) having a heat sink (21) on the back surface thereof; a circuit unit (4) which is provided with a lighting circuit for supplying lighting power to the light source module on the back surface of the support plate (43); and a frame (6) having two connecting plates (61) that connect the heat sink (23) and the support plate (43) in an opposing manner.

Description

Lighting device

Technical Field

The present invention relates to a lighting device including a light source unit and a circuit unit.

Background

A lighting device (lighting fixture) in which a light source unit and a circuit unit are supported by a pillar frame has been proposed (for example, patent document 1).

According to patent document 1, "a pillar frame in which a columnar arrangement space having an upper opening and a lower opening is formed includes: two main support columns and two main support columns which are arranged across from the upper opening to the lower opening; and two beams connecting the two main columns and the two main columns, wherein the beams and the main columns are combined by screws. A technique for manufacturing a lighting device by disposing a light source unit in a disposition space of a pillar frame.

Prior art documents

Patent document

Patent document 1: japanese patent laid-open publication No. 2017-41326

The lighting apparatus described above has a problem that the structure of the post frame is complicated.

Disclosure of Invention

An object of the present invention is to provide a lighting device that supports a light source unit and a circuit unit with a simple structure.

The lighting device according to the present invention and the lighting device according to one aspect of the embodiment include: a light source unit having a light source module on the surface of a heat sink having a heat sink on the back surface thereof; a circuit unit having a lighting circuit for supplying lighting power to the light source module on a back surface of the support plate; and a frame body having two connecting plates for connecting the heat dissipation plate and the support plate in an opposing state.

Effects of the invention

According to the above configuration, since the light source unit and the circuit unit are coupled by the two coupling plates, the light source unit and the circuit unit can be supported by a simple structure.

Drawings

Fig. 1 is a perspective view of the illumination device of the embodiment as viewed from the irradiation direction.

Fig. 2 is a perspective view of the illumination device in an exploded state as viewed from the irradiation direction.

Fig. 3 is a view showing one apparatus main body, (a) is a perspective view seen from an irradiation direction, and (b) is a perspective view seen from an installation surface side.

Fig. 4 is a view showing the light source unit, (a) is a perspective view seen from the irradiation direction, and (b) is a perspective view seen from the installation surface side.

Fig. 5 is a perspective view of a state where the light source cover is removed from the light source unit as viewed from the irradiation direction.

Fig. 6 is a perspective view of the light source unit in an exploded state as viewed from the irradiation direction.

Fig. 7 is a perspective view of the light source unit in an exploded state as viewed from the installation surface side.

Fig. 8 is a view of the circuit cover removed from the circuit unit as viewed from the installation surface side.

Fig. 9 is a perspective view of the circuit unit in an exploded state as viewed from the irradiation direction.

Fig. 10 is a perspective view of the circuit unit in an exploded state as viewed from the installation surface side.

Fig. 11(a) is a perspective view of the linking plate viewed from the front side, and (b) is a perspective view of the linking plate viewed from the back side.

Description of the symbols

1 Lighting device

2 light source unit

4 circuit unit

6 frame body

8 device body

61 connecting plate

Detailed Description

< summary >

An illumination device according to an aspect of an embodiment includes: a light source unit having a light source module on the surface of a heat sink having a heat sink on the back surface thereof; a circuit unit having a lighting circuit for supplying lighting power to the light source module on a back surface of the support plate; and a frame body having two connecting plates for connecting the heat dissipation plate and the support plate in an opposing state.

In the lighting device according to another aspect of the embodiment, the heat sink and the support plate have a square shape, a rectangular shape, or a shape close to these, and the two coupling plates couple the two ends of the heat sink and the support plate in the first direction with each other with a gap between the light source unit and the circuit unit. This allows the heat generated from the light source module to be efficiently released by the heat sink.

In an illumination device according to another aspect of the embodiment, the connection plate includes: a pair of main coupling portions coupling the heat dissipation plate and the support plate; and an auxiliary coupling portion coupling the pair of main coupling portions to each other. Thereby, the strength of the web is ensured.

In the lighting device according to another aspect of the embodiment, the heat dissipation plate includes: a flat plate portion in a square shape, a rectangular shape, or a shape similar to these shapes; and an upright portion that is provided upright from a peripheral edge of the flat plate portion toward the circuit unit, an end portion of the main connection portion that is present on the light source unit side including: a fixing part fixed on the vertical part of the heat dissipation plate through a fixing piece; and an engaging portion that engages with the flat plate portion of the heat sink or the upright portion of the heat sink from the front surface side. This can improve the reliability of the connection between the connecting plate and the heat sink.

In an illumination device according to another aspect of the embodiment, the main connecting portion includes: a first abutting portion abutting against an upright portion located at an end portion of the flat plate portion of the heat dissipation plate in the first direction; and a second abutting portion that abuts against an upright portion located at an end portion of the flat plate portion of the heat radiating plate in a second direction orthogonal to the first direction, wherein the fixed portion is provided at least one of the first abutting portion and the second abutting portion, and the engaging portion is provided at least one of the first abutting portion and the second abutting portion. Thus, the heat sink is connected to the connecting plate without play.

In the lighting device according to another aspect of the embodiment, the support plate includes: a flat plate portion in a square shape, a rectangular shape, or a shape similar to these shapes; and an upright portion that is provided upright from a peripheral edge of the flat plate portion toward the light source unit, at least one of the main coupling portion and the auxiliary coupling portion of the coupling plate facing the upright portion of the support plate. Thus, the support plate can be coupled without play in a direction in which the upright portion of the support plate faces at least one of the main coupling portion and the auxiliary coupling portion.

In the lighting device according to another aspect of the embodiment, the standing portion of the support plate includes: a fixing portion fixed to at least one of the main coupling portion and the auxiliary coupling portion of the coupling plate by a fixing member; and an engaging portion that engages with at least one of the main coupling portion and the auxiliary coupling portion. This can improve the reliability of the connection between the support plate and the heat sink.

In an illumination device according to another aspect of the embodiment, the light source unit includes a light source cover that covers the light source module, and the light source cover includes: a fixing part fixed on the heat dissipation plate through a fixing part; and an engaging portion engaged with the heat dissipation plate. This improves the reliability of the attachment of the light source cover and the heat sink.

< embodiment >

1. Summary of the invention

The description will be mainly given with reference to fig. 1 to 3.

The lighting device 1 according to the embodiment includes a device body 8 formed by supporting the light source unit 2 and the circuit unit 4 by a frame 6. The lighting device 1 is mounted on a high ceiling or the like to illuminate a lower side, or mounted on a floor or the like to illuminate an obliquely upper side, for example. Therefore, the lighting device 1 includes an arm 9 for attaching the device body 8 to an attachment surface, an installation surface, or the like.

The lighting device 1 here includes two device bodies 8 arranged in parallel. The two apparatus main bodies 8 have the same structure. The direction of light emitted from the device main body 8 is the front side. When the device main body 8 is viewed from the front side, the device main body 8 has a rectangular shape, and the longitudinal direction thereof is also simply referred to as the longitudinal direction, and the width direction thereof is also simply referred to as the short side direction.

Hereinafter, each part will be explained.

2. Light source unit

The description will be mainly given with reference to fig. 4 to 7.

The light source unit 2 includes a light source module 25 on the surface of a heat sink 23, and the heat sink 23 has a heat sink 21 on the back surface. The light source unit 2 here includes a light source cover 27 covering the light source module 25. The light source unit 2 here includes an optical member 29. The optical member 29 includes a reflection unit that reflects light emitted from the light source module 25. The heat sink is constituted by the heat sink 21 and the heat radiation plate 23.

(1) Heat sink

The heat sink 21 releases heat generated in the light source module 25. Specifically, the heat transferred from the light source module 25 to the heat sink 21 via the heat sink 23 is released to the air convected around the heat sink 21.

The heat sink 23 has a substantially rectangular shape. As shown in fig. 3(a), the heat sink 23 is coupled to the housing 6 so as to create a space between the heat sink 21 and the circuit unit 4. A space is provided between the circuit unit 4 (support plate 43) and the heat sink 21 to efficiently release heat to the circulating air.

The plurality of fins 21 are provided along the longitudinal direction of the heat sink 23 at intervals in the short-side direction of the heat sink 23. The heat sink 21 has a cross section of "コ" by combining the first fin 211 and the second fin 212 (see fig. 4 and 5), for example, and the first fin 211 and the second fin 212 have a cross section of "L" by pressing a thin metal plate. In addition, the first fin 211 and the second fin 212 are referred to as "first" and "second" for convenience, and there is no particular reference to one of them as "first".

The first fin 211 and the second fin 212 are fixed to the heat sink 23 in a state of being overlapped with plate-like portions corresponding to short sides constituting an "L". Here, the first fin 211 and the second fin 212 have substantially the same configuration (shape), but the first fin and the second fin having different configurations may be used depending on the position of fixing to the heat sink 23. The first fin 211 and the second fin 212 are fixed to the heat dissipation plate 23 by, for example, welding, but the first fin 211 and the second fin 212 may be fixed to the heat dissipation plate 23 by other fixing methods or fixing units such as rivets or screws. The heat sink 21 may be formed by integrally press-working the first fin 211 and the second fin 212 to have an コ -shaped cross section.

(2) Heat radiation plate

The heat radiating plate 23 has a module mounting function of mounting the light source module 25 on a surface. The heat dissipation plate 23 has: a heat dissipation function of dissipating a part of heat generated in the light source module 25, and a heat conduction function of conducting a part of heat generated in the light source module 25 to the heat sink 21. The heat sink 23 has a cover attaching function of attaching the light source cover 27. The heat sink 23 has a coupling function of coupling the light source unit 2 to the housing 6.

The heat sink 23 includes a rectangular flat plate portion 231 and standing portions 241 and 242 standing from the peripheral edge of the flat plate portion 231 toward the circuit unit 4. Here, the standing portion standing from the long side edge of the flat plate portion 231 is a long standing portion 241, and the standing portion standing from the short side edge is a short standing portion 242. When it is not necessary to distinguish the long standing part 241 from the short standing part 242, the standing parts 241 and 242 are referred to as "standing parts.

(2-1) Flat plate part

The flat plate portion 231 has a cover attachment unit for attaching the light source cover 27. Here, the light source cover 27 is attached to the heat sink 23 by two kinds of cover attaching means, the first cover attaching means is located at the flat plate portion 231, and the second cover attaching means is located at the standing portions 241, 242.

Here, the light source cover 27 is fixed by a fixing member, and in the case where the screw body 201 is used as the fixing member, for example, the first cover attaching unit is constituted by the screw hole 234. Four screw bodies 201 and four screw holes 234 are provided at four corners of the rectangular flat plate portion 231.

The flat plate portion 231 has a module mounting unit for mounting the light source module 25. Here, the light source module 25 is fixed by a fixing member, and when the screw body 203 is used as the fixing member, for example, the module mounting means is constituted by a screw hole 235 (see fig. 6). Six screw bodies 201 and six screw holes 235 are provided inside an imaginary rectangular shape connecting the four screw holes 234.

The flat plate portion 231 has a cable through hole 236 (see fig. 6) for electrically connecting the circuit unit 4 and the light source unit 2 (light source module 25). Further, a bushing 204 for a cable is fitted into the through hole 236.

The flat plate portion 231 has an optical member positioning unit for the optical member 29. Here, the optical member 29 has a convex portion 296 on the inner surface of the inclined portion 294, and the flat plate portion 231 has a recess or through hole 237 into which the convex portion 296 is fitted. That is, the optical member positioning unit is constituted by the through hole 237. In addition, two convex portions 296 are provided at intervals in the longitudinal direction of the flat plate portion 231, and two through holes 237 are provided.

(2-2) standing part

The standing portions 241 and 242 are obtained by, for example, pressing a plate-like member. The standing portions 241 and 242 are formed over the entire length of each side of the flat plate portion 231.

The standing portions 241 and 242 have second cover attaching means for attaching the light source cover 27. Here, the light source cover 27 has a projecting piece 287 projecting toward the back surface side, and the second cover attachment unit is constituted by a through hole 243 to be engaged with the engagement portion (the projecting portion 289 of the projecting piece 287). In addition, the convex portion 289 of the protruding piece 287 is located between two opening surfaces in the front-back direction constituting the through hole 243. Thus, the light source cover 27 can be prevented from being easily displaced in the front-back direction even without the screw body 201.

The number of the projecting pieces 287 of the light source cover 27 is ten in total at the middle portion between both ends of each side of the rectangular annular plate 271, and the number of the through holes 243 is ten in total at the portions corresponding to the projecting pieces 287.

The standing portions 241 and 242 include light source side coupling means coupled to the coupling plate 61 of the housing 6. Here, the heat sink 23 is connected to the connecting plate 61 by two types of light source side connecting units, the first light source side connecting unit is located at the long standing portion 241, and the second light source side connecting unit is located at the boundary portion between the standing portion 242 and the flat plate portion 231.

A fixing member is used for the first light source side connection. As shown in fig. 3, the first light source side coupling unit is constituted by a screw hole 244 using the screw body 205 as a fixing member. Since the long standing portion 241 is formed of a thin plate-like member, the screw hole 244 is formed by burring. The screw holes 244 are provided at both ends of the long plate portion 231 of the long standing portion 241 in the longitudinal direction.

The second light source side is connected by a clamping structure. The connecting plate 61 has a locking piece 68 (see fig. 11), and the second light source side connecting means is constituted by a through hole 245 to which the locking piece 68 is engaged. The locking piece 68 engages with the front-back side end surface constituting the through hole 245. Thus, when the light source unit 2 is disposed so as to illuminate downward, the light source unit 2 can be made less likely to fall even without the screw body 205.

The through holes 245 are provided on both ends in the short side direction of the rectangular flat plate portion 231 of each short standing portion 242.

(3) Light source module

The light source module 25 is a so-called square light source module having a rectangular shape when viewed from the front surface side. The light source module 25 includes a plurality of LED elements 251 and an LED substrate 253 on which the plurality of LED elements 251 are mounted. The light source module 25 includes a connector 255 for receiving power on the LED substrate 253. The connector 255 is detachably connected to a cable connected to the circuit unit 4.

The plurality of LED elements 251 are arranged in a matrix, and the entire LED element is rectangular and long in the longitudinal direction of the LED substrate 253. The LED element 251 here is a so-called Mid Power chip.

Here, the LED substrate 253 has a rectangular shape that is long in the longitudinal direction of the rectangular heat sink 23. The size of the LED substrate 253 is smaller than the size of the fin region of the heat dissipation plate 23 on which the heat dissipation sheet 21 is mounted. That is, when the light source unit 2 is projected, the LED substrate 253 is smaller than and located within the fin region. This enables efficient heat release from the LED element 251.

The LED substrate 253 has a through hole 257 for the bushing 204 (cable), a through hole 258 for attaching the light source module 25 to the screw body 203 of the heat dissipation plate 23, and a through hole 259 for positioning the convex portion 296 of the optical member 29. The through hole 258 constitutes an example of the module mounting unit.

(4) Light source cover

The light source cover 27 is shaped like a rectangular tray with a concave center portion. The light source cover 27 has an annular plate 271 and a bulging portion 281. The light source cover 27 further includes a cover attaching unit for attaching the light source cover to the heat radiating plate 23. The light source cover 27 has a function of providing the optical member 29 on the heat sink 23.

(4-1) annular plate portion

The annular plate 271 has a rectangular annular shape. The annular plate 271 is long in the longitudinal direction of the light source module 25. The back surface of the annular plate 271 faces the outer periphery of the light source module 25 or the optical member 29 on the flat plate 231 of the heat sink 23. The back surface here abuts on the flat plate portion 231.

The annular plate 271 has a groove 273 (see fig. 7) continuous in the circumferential direction at a portion near the inner circumferential edge on the back surface. The groove 273 is used for omitting an illustrated seal. The sealing material improves the adhesion between the light source cover 27 and the heat sink 23. This can prevent the oil component dispersed in the air from adhering to the LED element 251 and the like.

The annular plate portion 271 has a pair of short side portions 275 and a pair of long side portions 277. The short side portion 275 has a notch 278 at a portion near both the long side portions 277. The notch 278 is used for the locking piece 68 of the connecting plate 61.

At the corner portion of the annular plate portion 271, i.e., the portion where the short side portion 275 intersects with the long side portion 277, there is a through hole 279. The through hole 279 is for the screw body 201. The through hole 279 corresponds to an example of a first cover attachment unit described later. The peripheral portion of the through hole 279 is an example of a fixing portion fixed to the heat sink 23 by the screw 201.

(4-2) bulging portion

The bulging portion 281 bulges from the inner peripheral edge of the annular plate portion 271 toward the front surface side. The light source module 25 and the optical member 29 are accommodated in a space between the bulging portion 281 and the heat dissipation plate 23. The protruding portion 281 has a structure in which the optical member 29 or the light source module in the accommodated state does not shake.

The bulging portion 281 includes an upright portion 283 erected from the inner peripheral edge of the annular plate portion 271 toward the front surface side, and a cover portion 285 closing the front surface side end of the upright portion 283. The inner peripheral surface of the standing portion 283 is close to or in contact with the outer peripheral surface of the optical member 29. The intersection between the standing portion 283 and the lid portion 285 is smooth.

The region of the cover portion 285 facing the opening 298 in the center of the optical member 29 and the inclined portion 294 in the periphery thereof is a light transmitting region through which light emitted from the LED element 251 passes. The portion of the lid portion 285 facing the annular flat plate portion 292 of the optical member 29 and the standing portion 283 are positioning regions for positioning the optical member 29.

The inner surface of the cover portion 285 may also have a function of dispersing light from the light source module 25. The dispersion function may be implemented by, for example, microlenses, textures, and the like.

(4-3) mounting Unit

The light source cover 27 has a cover attachment unit to the heat sink 23. Here, the light source cover 27 is attached by the two cover attaching means, and the first cover attaching means and the second cover attaching means are located on the annular plate portion 271.

In the first cover attachment, the light source cover 27 is attached to the heat sink 23 by a first cover attachment unit on the heat sink 23 side using a fixing member. The fixing member is a screw body 201, and the first cover mounting unit is constituted by a through hole 279. A screw body 201 is inserted into the through hole 279, and the screw body 201 is screwed into the screw hole 234 which is the first cover attachment unit on the heat sink 23 side. In addition, the through-hole 279 is as described above.

In the second cover attachment, the light source cover 27 is attached to the heat sink 23 by the second cover attachment means on the heat sink 23 side by the engagement structure. The second cover attachment unit includes a projecting piece 287 projecting from the annular plate 271 toward the back surface side and a projecting portion 289 (see fig. 7) projecting inward (toward the bulging portion 281) from the back surface side end of the projecting piece 287. The projection 289 engages with the through hole 243 of the heat-releasing plate 23. Here, the convex portion 289 is an example of an engaging portion with the heat-releasing plate 23.

The protruding pieces 287 are formed in two on the short side portions 275 and in three on the long side portions 277. The protruding pieces 287 are provided one or more between both ends of the short side portion 275 and between both ends of the long side portion 277, respectively. This can improve the adhesion of the light source cover 27 to the heat sink 23.

(5) Optical component

The description will be mainly given with reference to fig. 5 to 7.

The optical member 29 has a reflection portion 291 that reflects light from the light source module 25. The reflection portion 291 is formed of an inclined surface which is disposed on the outer periphery of the plurality of LED elements 251 arranged in a rectangular shape as a whole and moves to the front surface side as it is separated from the LED elements 251.

The optical member 29 includes: a rectangular annular flat plate portion 292 which is in contact with the cover portion 285 of the light source cover 27; an upright portion 293 extending from the outer peripheral edge of the annular flat plate portion 292 toward the rear surface side; and an inclined portion 294 inclined inward so as to be narrower from the inner peripheral edge of the annular flat plate portion 292.

The surface of the inclined portion 294 is an inclined surface of the reflection portion 291. The optical member 29 is made of, for example, a white resin material, and has a surface having a reflection function. The reflection function may be performed by plating, for example. In the optical member 29, the LED element 251 is exposed from the opening 298 at the center of the rectangular annular inclined portion 294, and a part of the light emitted from the LED element 251 is reflected by the surface (inclined surface) of the inclined portion 294.

The optical component 29 may have a space formed on the back side of the annular flat plate portion 292, the standing portion 293, and the inclined portion 294 as a housing space, and may be provided with a cable, for example. The LED board 253 is configured such that a connector 255 for connecting to a cable is positioned in the housing space.

The optical member 29 includes a rib 295 (see fig. 7) extending from the annular flat plate portion 292 toward the back surface side and connecting the inclined portion 294 to the standing portion 293. The rib 295 includes a rib parallel to the short side direction of the heat sink 23 and a rib parallel to the long side direction of the heat sink 23.

The optical component 29 has a convex portion 296 (see fig. 7) on the back surface of the inclined portion 294 for positioning with respect to the heat sink 23. The convex portion 296 is inserted into the through hole 259 of the LED substrate 253 of the light source module 25 and enters the through hole 237 of the heat dissipation plate 23 (see fig. 6).

The optical component 29 has positioning means (convex portion 296) for the heat dissipation plate 23, but does not have attachment means to the heat dissipation plate 23. The optical component 29 is disposed on the heat sink 23 by fixing the light source cover 27, which accommodates the optical component 29 in the protruding portion 281, to the heat sink 23.

The outer surface shape of the optical member 29 corresponds to (coincides with) the inner surface shape of the protruding portion 281 of the light source cover 27, and the optical member 29 is arranged at a predetermined portion of the heat sink 23 by attaching the light source cover 27 to the heat sink 23.

The optical member 29 has a convex portion 297 protruding toward the light source cover 27 (front surface side) at the annular flat plate portion 292. Here, the convex portion 297 is formed in a rectangular ring shape extending over the entire circumference at the center of the rectangular ring-shaped flat plate portion 292. The top of the convex portion 297 abuts against the inner surface (back surface) of the light source cover 27. This enables positioning of the optical member 29 in the light source cover 27 and also enables accommodation of thermal expansion of the optical member 29.

3. Circuit unit

The description will be mainly given with reference to fig. 3, 8 to 10.

The circuit unit 4 is supported by the frame 6 with a space from the light source unit 2. The circuit unit 4 includes a lighting circuit 41 for supplying lighting power to the light source module 25 on the back surface side of the support plate 43. The lighting circuit 41 is provided for one light source module 25 (light source unit 2), and if there are two light source units 2, as shown in fig. 1, for example, there are two lighting circuits 41 in total.

The circuit unit 4 includes a circuit cover 45 attached to the support plate 43 so as to cover the lighting circuit 41. The circuit unit 4 includes a terminal block unit 47 for connecting a cable connected to a commercial power supply. The circuit unit 4 includes an insulating case 49 for securing insulation of the lighting circuit 41.

(1) Lighting circuit

The lighting circuit 41 has a circuit for receiving power from a commercial power supply and generating lighting power. The circuit is constituted by a plurality of electronic components 411, and the plurality of electronic components 411 are mounted on a circuit board 413. In the figure, a plurality of electronic components 411 are shown in a block shape.

The circuit board 413 has a rectangular shape elongated in the longitudinal direction of the support plate 43. The circuit board 413 has a through hole 415 at a corner thereof. The through hole 415 corresponds to an example of a circuit fixing means for fixing the circuit board 413 (the lighting circuit 41) to the support plate 43. A screw body 401 as an example of a fastener is inserted into the through hole 415, and the screw body 401 is screwed into a screw hole or a screw hole of a convex portion provided on the back surface of the support plate 43. Here, the boss portion 441 is used as a convex portion, and a screw hole 442 is provided in the boss portion 441. Thus, the circuit board 413 is supported by the upper surface of the boss portion 441 and fixed in a state of being separated from the support plate 43. Further, a bottom plate 491 of the insulating case 49 is disposed between the circuit board 413 and the support plate 43.

(2) Supporting plate

The support plate 43 has a circuit supporting function of placing (supporting) the lighting circuit 41. The support plate 43 has a circuit fixing unit fixing the spot lamp circuit 41. The support plate 43 has a circuit cover mounting function of mounting the circuit cover 45. The support plate 43 has a terminal block fixing function of fixing the terminal block assembly 47. The support plate 43 has a coupling function of coupling the circuit unit 4 and the housing 6.

The support plate 43 has a projection shape substantially the same as the projection shape of the heat dissipation plate 23 of the light source unit 2. Here, the heat dissipation plate 23 has a rectangular projected shape, and the projected shape of the support plate 43 is also rectangular or substantially rectangular.

The support plate 43 has a rectangular or substantially rectangular flat plate portion 431 and upright portions 432, 433 that are erected from the peripheral edge of the flat plate portion 431 toward the light source unit 24 side. Here, the standing portion standing from the long-side edge of the flat plate portion 431 is a long standing portion 432, and the standing portion standing from the short-side edge is a short standing portion 433. In addition, when it is not necessary to distinguish between the long standing portion 432 and the short standing portion 433, the standing portions 432 and 433 are provided.

The center of the short side of the flat plate portion 431 is a notch 434 recessed inward in the longitudinal direction. Short standing portions 433 are provided on both sides in the short side direction of the notch portion 434 with respect to the flat plate portion 431. Two short standing portions 433 are provided on each short side.

(2-1) Flat plate part

The flat plate portion 431 includes, on the back surface thereof, a circuit supporting unit for supporting the circuit board 413 and a circuit fixing unit for fixing the circuit board 413. Here, the circuit supporting unit is constituted by a boss portion 441, and the circuit fixing unit is constituted by a screw hole 442 formed in the boss portion 441.

The flat plate portion 431 has a circuit cover attaching unit to which the circuit cover 45 is attached. Here, the circuit cover 45 is attached to the support plate 43 by two kinds of circuit cover attaching units. The first circuit cover mounting means, which is one of the two circuit cover mounting means, uses a fixing member, and the second circuit cover mounting means, which is the other, uses an engaging structure.

The first circuit cover mounting means is constituted by a screw hole 443 (see fig. 10) to be screwed into the screw body 402 as an example of the fixture. The screw hole 443 is formed by flanging. The second circuit cover attachment means is constituted by a through hole 444 into which the bent portion 456 of the circuit cover 45 is inserted and engaged with the flat plate portion 431. The bent portion 456 of the circuit cover 45 enters the through hole 444 from the back side (outer side), and the entering bent portion 456 engages with the plate portion 431a existing on the entering direction side with respect to the through hole 444 of the flat plate portion 431. The through hole 444 has a rectangular shape elongated in the longitudinal direction of the flat plate portion 431.

The flat plate portion 431 has a terminal block fixing unit that fixes the terminal block assembly 47. A fixing member is used for fixing the terminal block assembly 47. The fixing member here is a screw body 403 (see fig. 9), and the terminal block fixing means is constituted by a screw hole 445 for the screw body 403. Further, the screw hole 445 is formed by burring.

The flat plate portion 431 has a rotation stop unit so that the terminal block assembly 47 fixed by the screw body 403 does not rotate and move. The rotation stopper is constituted by a through hole 446 into which the front end of the bent portion 477 of the terminal block assembly 47 is inserted. The through hole 446 here has a groove shape extending in the short side direction. Further, the front-side end of the bent portion 477 extends further toward the front side than the front-side ends of the inclined portion 475 and the connection portion 476, and the groove 478 at the extended tip of the bent portion 477 engages with the through hole 446 by moving the terminal block assembly 47 in the short-side direction in a state where the front-side end of the bent portion 477 is inserted into the through hole 446.

(2-2) standing part

The standing portions 432 and 433 are configured to face both the main coupling portion 62 and the auxiliary coupling portion 63 of the coupling plate 61 of the housing 6. In the state of being coupled to the coupling plate 61, the standing portions 432 and 433 are positioned outside the main coupling portion 62 and the auxiliary coupling portion 63 of the coupling plate 61. This can restrict the displacement of the support plate 43 (circuit unit 4) relative to the housing 6 in the direction orthogonal to the front-back direction.

One of the upright portions 432, 433 has a circuit-side connecting means connected to the connecting plate 61 of the frame 6. One upstanding portion is a long upstanding portion 432. The connection here uses a fastener. As shown in fig. 3, the circuit-side coupling means is constituted by a screw hole 447 using the screw body 405 as a fixture. That is, the elongated portion 432 is an example of a fixed portion fixed to the main coupling portion 62 of the coupling plate 61 by the screw body 405. One short standing portion 433 of the standing portions 432 and 433 is an example of an engaging portion that engages with the main coupling portion 62 and the auxiliary coupling portion 63.

Since the long standing portion 432 is formed of a thin plate-like member, the screw hole 447 is formed by burring. The screw holes 447 are provided at both ends of the long plate portion 431 of the long standing portion 432 in the longitudinal direction.

(3) Circuit cover

The circuit cover 45 has a box shape with an open front surface. The circuit cover 45 has a rectangular shape elongated in the longitudinal direction of the rectangular support plate 53 when viewed from the back side, and has a rectangular parallelepiped shape (front side opening) with the smallest dimension in the front-back direction.

The circuit cover 45 has a rectangular top plate portion 451, long side plate portions 452 extending from the long sides of the top plate portion 451 to the front side, and short side plate portions 453 extending from the short sides of the top plate portion 451 to the front side.

One long side plate portion 452 has an opening 454 for exposing the terminal block assembly 47 to the outside of the circuit cover 45. There are two openings 454, namely for two-wire terminal block 471 and three-wire terminal block 472.

One long side plate portion 452 has a bent portion 456 bent outward in the short side direction from the front side end. The bent portions 456 are provided at both ends of one long-side plate portion 452 in the longitudinal direction. The bent portion 456 enters the through hole 444 of the support plate 43 and engages with the plate portion 431 a. That is, the bent portion 456 constitutes an example of the first circuit cover mounting unit.

The other long-side plate portion 452 has a bent portion 457 that is bent outward in the short-side direction over the entire length of the front-side end. The bent portion 457 has through holes 458 at both ends in the longitudinal direction of one long side plate portion 452. A screw 402 serving as a fixing member for fixing the circuit cover 45 to the support plate 43 is inserted into the through hole 458. That is, the through hole 458 of the bent portion 457 constitutes one example of the second circuit cover mounting unit.

(4) Terminal block assembly

The terminal block unit 47 is provided to facilitate connection to a cable on the commercial power supply side, not shown. The terminal block module 47 includes a terminal block and a terminal mounting plate 474 for mounting the terminal block.

Here, there are two types of terminal blocks, that is, a two-wire plug-in type two-wire terminal block 471 and a three-wire plug-in type three-wire terminal block 472. When it is not necessary to distinguish the two-wire terminal block 471 from the three-wire terminal block 472, these blocks are simply referred to as terminal blocks 471 and 472.

The terminal mounting plate 474 mounts the terminal blocks 471 and 472 such that the cable insertion ports of the terminal blocks 471 and 472 extend outward from the opening of the circuit cover 45. Here, the cables are inserted into the terminal blocks 471 and 472 so as to be mounted along the long side plate portions 452 of the circuit cover 45. The cables are mounted so that the insertion direction of the cables into the terminal blocks 471 and 472 is inclined with respect to the long side plate portions 452 of the circuit cover 45. The inclination direction is a direction approaching the long side plate portion 452 as approaching the insertion ports of the terminal blocks 471, 472. This facilitates the insertion of the cable, as compared with the case where the insertion direction of the cable into the terminal blocks 471 and 472 (particularly 471) is parallel to the long side plate portion 452.

The terminal mounting plate 474 is fixed to stand on the flat plate portion 431 of the support plate 43. The terminal mounting plate 474 is mounted in a state where the double-wire terminal block 471 and the three-wire terminal block 472 are arranged in parallel in the longitudinal direction of the support plate 43. The terminal blocks 471 and 472 are fixed to the terminal mounting plate 474 by screws.

The terminal mounting plate 474 includes: two inclined portions 475 inclined with respect to the long side plate portions 452 of the circuit cover 45; and a connecting portion 476 connecting the two inclined portions 475. The two inclined portions 475 are disposed substantially in parallel. Terminal blocks 471 and 472 are fixed to the inclined portion 475.

The terminal mounting plate 474 has bent portions 477 bent inward in the short-side direction from both ends in the long-side direction of the two inclined portions 475. The end of the curved portion 477 on the surface side protrudes further toward the surface side than the end of the inclined portion 475 on the surface side, and the groove 478 is provided in the protruding portion. The groove 478 engages with the through hole 446 of the flat plate portion 431 of the support plate 43. That is, the end portion on the front surface side of the bent portion 477 and the through hole 446 on the end portion on the front surface side constitute an example of rotation stopper means for preventing rotation of the terminal block assembly 47.

The terminal mounting plate 474 has a bent piece 480 bent from a surface-side end of the connecting portion 476 in the short-side direction (inward), and the bent piece 480 has a through hole 481. A screw 403 serving as a fixing member for fixing the terminal holding plate 474 to the support plate 43 is inserted into the through hole 481. That is, the through hole 481 of the bent piece 480 constitutes one example of the terminal block fixing means.

(5) Insulating shell

The insulating case 49 is disposed between the lighting circuit 41 and the support plate 43 and between the lighting circuit 41 and the long side plate portion 452 of the circuit cover 45. Since the lighting circuit 41 is separated from the short-side plate portion 453 of the circuit cover 45, the insulating case 49 is not disposed.

The insulating case 49 has a rectangular bottom plate 491 and an upright section 493 erected from the edge of the bottom plate 491 in the short side direction. The bottom plate 491 is positioned between the lighting circuit 41 and the support plate 43, and the standing part 493 is positioned between the lighting circuit 41 and the long side plate 452 of the circuit cover 45.

The bottom plate 491 has a notch 495 or a through hole 497 for the boss 441 of the support plate 43. The bottom plate 491 has a notch 499 for the bushing 407 fitted to the through hole 448 of the support plate 43.

4. Frame body

The description will be mainly given with reference to fig. 11.

The frame 6 includes two connecting plates 61 (fig. 2) that connect the heat sink 23 and the support plate 43 in an opposing state. The two connecting plates 61 connect the heat sink 23 and the two ends of the support plate 43 in the longitudinal direction to each other. The connecting plate 61 is obtained by, for example, press working a single metal plate.

The connecting plate 61 has: a pair of main coupling portions 62 for coupling the heat sink 23 and the support plate 43; and an auxiliary coupling portion 63 coupling the pair of main coupling portions 62 to each other. The connecting plate 61 has a mounting portion 64 for mounting to the arm 9. The attachment portion 64 is provided by the auxiliary connection portion 63.

The connecting plate 61 has: a main coupling portion 62 extending in a direction (front-back direction) facing the heat sink 23 and the main surface of the support plate 43; and an auxiliary coupling portion 63 extending in a direction (short-side direction) orthogonal to the longitudinal direction of the heat sink 23 and the support plate 43. The connecting plate 61 is in a U shape having an auxiliary connecting portion 63 on the side of the support plate 43 out of the pair of main connecting portions 62.

The main coupling portion 62 has contact portions that contact the standing portions 241 and 242 of the heat sink 23 and the standing portions 432 and 433 of the support plate 43.

The contact portion with the outer surface of the end of the long standing portion 241 is defined as a long contact portion 65, and the contact portion with the outer surface of the end of the short standing portion 242 is defined as a short contact portion 66. In other words, the contact portion with the inner surface of the end of the long standing portion 432 is defined as the long contact portion 65, and the contact portion with the inner surface of the end of the short standing portion 433 is defined as the short contact portion 66.

The long contact portion 65 corresponds to an example of the "second contact portion" of the present invention, and the short contact portion 66 corresponds to an example of the "first contact portion" of the present invention. The main coupling portion 62 has a long abutment portion 65 and a short abutment portion 66 in an orthogonal state.

(1) Connection with light source unit

The end of the main coupling portion 62 on the light source unit 2 side includes: fixing portions fixed to the erected portions 241, 242 of the heat dissipation plate 23 by fixing members; and an engaging portion that engages with the flat plate portion 231 or the standing portions 241 and 242 of the heat sink 23 from the front surface side. Here, the fixing portion is located at the long abutment portion 65, and the engaging portion is located at the short abutment portion 66.

An example of a fixing member for fixing the end of the long abutting portion 65 to the heat radiating plate 23 is a screw 205, and the end of the long abutting portion 65 has a through hole 67. That is, as shown in fig. 13, the long contact portion 65 is fixed by inserting the screw body 205 through the through hole 67 and screwing it into the screw hole 244 (see fig. 4) of the long standing portion 241 in a state of being positioned outside the long standing portion 241 of the heat radiating plate 23. That is, the through hole 67 at the end of the long contact portion 65 constitutes an example of the first light source side coupling unit.

The front side end of the short contact portion 66 is a locking piece 68 bent toward the back side of the short contact portion 66, and is engaged with a through hole 245 (see fig. 4) existing at the boundary portion between the short standing portion 242 and the flat plate portion 231 of the heat radiating plate 23. That is, the locking piece 68 at the end of the short contact portion 66 constitutes an example of the second light source side connecting means.

(2) Connection to circuit unit

The end portion of the main connection portion 62 on the circuit unit 4 side is an example of a fixed portion fixed to the standing portions 432 and 433 of the support plate 43 by a fixing member. An example of a fixing member that fixes the end of the long contact portion 65 to the support plate 43 is a screw body 405 (see fig. 3), and the end of the long contact portion 65 has a through hole 69. That is, as shown in fig. 12 and 13, the long contact portion 65 is fixed by inserting the screw body 405 through the through hole 69 and screwing it into the screw hole 447 of the standing portion 432 in a state of being positioned inside the standing portion 432 of the support plate 43. That is, the through hole 69 at the end of the long contact portion 65 constitutes an example of the circuit-side connecting means. In addition, the through hole 69 is burring-worked.

The end portion of the main coupling portion 62 on the circuit unit 4 side is an example of an engaging portion that engages with the standing portions 432, 433 of the support plate 43 from the outside.

The connecting plate 61 has a bent portion 71 bent inward (toward the support plate 43) from the short contact portion 66 of the main connecting portion 62 and the end of the auxiliary connecting portion 63 on the circuit unit 4 side. The bent portion 71 abuts (supports) the flat plate portion 431 of the support plate 43 from the front surface side. The bent portions 71 are provided at both ends of the flat plate portion 431 of the support plate 43 in the short direction with a space.

(3) Mounting to arms

The attachment portion 64 has an extension portion 73 extending in the back direction from the center portion in the short side direction of the support plate 43 in the auxiliary coupling portion 63. The extension portion 73 is disposed between the two bent portions 71.

The bolts 88 (see fig. 1) are used for attachment to the arms 9, and nuts 74 for two bolts 88 are provided on the back surface of the extension portion 73 in the front-back direction. The nut 74 is attached by welding, for example.

The mounting portion 64 includes, for example, as shown in fig. 1, a mounting means for mounting the mounting plate 90 to the arm 9 in a state where the two apparatus main bodies 8 are arranged in parallel. In the attachment, the screw body 89, which is an example of a fixture, is used, and the screw hole 75 for the screw body 89 is provided in the extension portion 73 and the auxiliary coupling portion 63. Four screw holes 75 are provided around the two nuts 74, one screw hole is provided at the end of each short contact portion 66 on the circuit unit 4 side, and six screw holes are provided in total. Four screw holes 75 are provided around the nut 74 at positions corresponding to the corners of the square shape.

5. Arm(s)

The description will be mainly given with reference to fig. 1 and 2.

The arm 9 has a mounting function of mounting the apparatus body 8 on a mounting surface. When the apparatus main body 8 is one, the arm 9 is directly attached to the apparatus main body 8, and when the apparatus main body 8 is two as shown in fig. 1, the arm 9 is attached to the two apparatus main bodies 8 via the attachment plate 90.

The arm 9 has an arm main body 91 in a "U" shape. The arm body 91 has an installation surface side fixing portion 92 fixed to an installation surface and a device side fixing portion 93 fixed to the device body 8 side. The installation surface-side fixing portion 92 extends in the longitudinal direction of the support plate 43 of the circuit unit 4. The installation surface-side fixing portion 92 has a plurality of through holes 94 for fixing. The device-side fixing portion 93 extends in a direction perpendicular to both ends in the longitudinal direction of the installation-side fixing portion 92. The device-side fixing portion 93 has a through hole at the extended front end portion. When the connection plate 61 is attached to the frame 6 of the apparatus main body 8, a bolt screwed with a nut 74 (see fig. 11) of the connection plate 61 is inserted through the through hole. In the case where the apparatus main body 8 is two as shown in fig. 1, the bolt 88 screwed to the nut body 99 attached to the attachment plate 90 is inserted through the through hole.

One of the through holes has an arc shape with the center axis of the bolt 88 inserted through the other through hole as the rotation center. Here a through hole on the surface side. This allows the arm 9 to be fixed in a posture capable of adjusting the apparatus main body 8.

The attachment plate 90 is connected to the arm 9 in a state where the two apparatus main bodies 8 are arranged in parallel. Here, the state of being arranged in parallel refers to a state of being arranged in the short side direction of the rectangular heat dissipation plate 23 or the support plate 43. The attachment plate 90 includes a coupling portion 95 that couples the coupling plates 61 of the two device bodies 8 arranged in parallel and an arm-side fixing portion 96 that is fixed to the device-side fixing portion 93 of the arm 9.

The coupling portion 95 is formed in a plate shape parallel to the auxiliary coupling portion 63 of the two coupling plates 61 arranged in parallel. The coupling portion 95 has a plurality of through holes 97. The through holes 97 are provided corresponding to the screw holes 75 of the coupling plates 61. The through hole 97 is inserted with a screw body 89 screwed into the screw hole 75 of the coupling plate 61.

The coupling portion 95 has a bent piece 98 bent inward (toward the device main body 8) from the front side end. When the coupling portion 95 is fixed to the coupling plate 61 by the screw 89, the bent piece 98 abuts (engages) with the bent portion 77 of the auxiliary coupling portion 63 of the coupling plate 61 at the front surface side end from the front surface side.

The arm-side fixing portion 96 extends from the rear-side end of the attachment plate 90 and from substantially the center in the parallel arrangement direction toward the rear side. The arm-side fixing portion 96 has a through hole and a nut body 99. The nut body 99 is provided integrally with the back surface of the arm-side fixing portion 96, and the screw hole of the nut body 99 is connected to the through hole. The arm main body 91 and the mounting plate 90 are fixed by a bolt 88, and the bolt 88 is inserted through the through hole and then screwed to the nut body 99.

6. Assembly

(1) Since the two connecting plates 61 are used for connecting the light source unit 2 and the circuit unit 4, the two units can be easily connected.

(2) The light source cover 27 is attached to the heat sink 23 by two types, i.e., a first cover attaching unit using the screw body 201 and a second cover attaching unit using an engaging structure. Therefore, the light source cover 27 is less likely to fall off the heat sink 23.

(3) The light source unit 2 is assembled to the housing 6 by two types, i.e., a first light source side coupling unit using the screw body 205 and a second light source side coupling unit using an engagement structure. Therefore, the light source unit 2 is less likely to fall off the housing 6.

(4) The circuit unit 4 is assembled to the housing 6 by the circuit-side coupling unit using the screw body 405, and the standing portions 432 and 433 of the support plate 43 engage with the main coupling portion 62 and the auxiliary coupling portion 63 of the coupling plate 61 from the outside. Therefore, the circuit unit 4 does not slide relative to the housing 6, and the screw body 405 can be made less likely to become loose.

(5) The circuit cover 45 is attached to the support plate 43 by two types, i.e., a first circuit cover attaching unit using the screw body 403 and a second circuit cover attaching unit using an engaging structure. Therefore, the circuit cover 45 is less likely to slide relative to the support plate 43, and the screw body 403 is less likely to be loosened. In addition, the circuit cover 45 is not easily detached from the support plate 43.

(6) The two device main bodies 8 and the arm 9 are attached via the attachment plate 90, and the bent piece 98 is engaged with the bent portion 77 of the coupling plate 61 from the front side by the screw 89. Therefore, the apparatus main body 8 can be made less likely to fall off the arm 9.

The main components of the lighting device shown in these embodiments are connected by a plurality of connecting units, and only one of the connecting units has sufficient mechanical strength necessary for supporting the structural component to be supported, and therefore, even if a failure occurs in one of the connecting units, the other connecting unit supports the component, and thus the possibility of dropping the component or the like is reduced.

The plurality of coupling units are a plurality of types of coupling units having different coupling structures or coupling functions, and for example, two engaging units that are engaged/engaged in a reverse structure are not included in the plurality of coupling units, such as a coupling unit having a screw structure and a coupling unit having an engaging structure. Further, a plurality of (a plurality of) coupling units each having a coupling structure and a coupling function may be provided.

The embodiments have been described above, but the embodiments are not limited to these embodiments, and for example, the following modifications are possible. The embodiment, the modification and the modification may be combined with each other.

In addition, design modifications not described in the embodiment or the modification and not departing from the scope of the invention are also included in the present invention.

< modification example >

(1) In an embodiment, one arm is mounted with respect to both device bodies. However, one apparatus main body may be mounted on one arm.

(2) The support plate and the heat sink in the embodiment have rectangular shapes, but may have other shapes. The connecting plate connects the rectangular support plate and the short-side end portions (both end portions in the longitudinal direction) of the heat sink to each other, but the long-side end portions (both end portions in the short-side direction) may be connected to each other. In addition, if the assembly efficiency of the frame is not considered, three or more connecting plates may be provided.

(3) In the embodiment, the two device bodies are arranged in parallel in the short side direction of the support plate or the heat sink, but may be arranged in parallel in the long side direction, three or more may be arranged in parallel in the short side direction or the long side direction, or a plurality of the device bodies may be arranged in the short side direction and the long side direction.

(4) The main connection portion of the connection plate abuts against the outer surface of the standing portion of the heat dissipation plate, but may abut against the inner surface. The long contact portion may be in contact with an outer surface of the long standing portion, and the short contact portion may be in contact with an inner surface of the short standing portion, or vice versa.

(5) The main coupling portion and the auxiliary coupling portion of the coupling plate are in contact with the inner surface of the upright portion of the support plate, but may be in contact with the outer surface. The long contact portion may contact the outer surface of the long standing portion, and the short contact portion and the auxiliary coupling portion may contact the inner surface of the short standing portion, or vice versa.

(6) In the connection of the connecting plate and the heat dissipating plate, the long abutting portion is fixed by the screw body, and the short abutting portion has the locking piece, but the long abutting portion may have the locking piece and the short abutting portion is fixed by the screw body, at least one of the short abutting portion and the long abutting portion may have the locking piece and fixed by the screw body, or both the short abutting portion and the long abutting portion may have the locking piece and fixed by the screw body.

(7) In the connection of the connecting plate and the support plate, the long contact portion is fixed by the screw body, but the short contact portion may be fixed by the screw body, or both the short contact portion and the long contact portion may be fixed by the screw body.

(8) The fastener according to the embodiment uses a screw body, but may be a pin or a rivet, for example.

(9) The relationship of the engaging structure of the embodiment is an example, and the engaging relationship may be reversed. Specifically, the protruding piece 287 of the light source cover 27 in the embodiment has the protruding portion 289, and the standing portions 241 and 242 of the heat-releasing plate 23 have the through hole 243, but the protruding piece may have a through hole, and the standing portion may have a protruding portion.

(10) The two terminal blocks are arranged in parallel along the longitudinal direction of the circuit cover, but for example, the two terminal blocks may be arranged in parallel in the front-back direction.

(11) In the embodiment, one circuit unit is provided in one light source unit, but one circuit unit may be provided for a plurality of light source units.

Claims

1. An illumination device is characterized by comprising:

a light source unit having a light source module on a surface of a heat sink having a heat sink on a back surface thereof;

a circuit unit including a lighting circuit for supplying lighting power to the light source module on a back surface of a support plate; and

and a frame body having two connecting plates for connecting the heat sink and the support plate in an opposing state.

2. The lighting device of claim 1,

the heat dissipation plate and the support plate are square, rectangular or similar to the square, rectangular or similar shapes,

the two joining plates join the heat dissipation plate and the support plate at both ends in the first direction with each other in a state where a gap exists between the light source unit and the circuit unit.

3. The lighting device of claim 2,

the web has: a pair of main coupling portions coupling the heat dissipation plate and the support plate; and an auxiliary coupling portion coupling the pair of main coupling portions to each other.

4. A lighting device as recited in claim 3,

the heat dissipation plate has: a flat plate portion in a square shape, a rectangular shape, or a shape similar to these shapes; and an upright portion provided upright from the peripheral edge of the flat plate portion toward the circuit unit side,

an end portion of the main coupling portion on the light source unit side includes: a fixing part fixed on the vertical part of the heat dissipation plate through a fixing piece; and an engaging portion that engages with the flat plate portion of the heat sink or the upright portion of the heat sink from the front surface side.

5. The lighting device of claim 4,

the main coupling portion includes: a first abutting portion abutting against an upright portion located at an end portion of the flat plate portion of the heat dissipation plate in the first direction; and a second abutting portion abutting against an erected portion located at an end portion of the flat plate portion of the heat radiating plate in a second direction orthogonal to the first direction,

the fixing portion is provided on at least one of the first abutting portion and the second abutting portion,

the engaging portion is provided on at least one of the first abutting portion and the second abutting portion.

6. A lighting device as recited in any one of claims 3-5,

the support plate has: a flat plate portion in a square shape, a rectangular shape, or a shape similar to these shapes; and an upright portion provided upright from the peripheral edge of the flat plate portion toward the light source unit,

at least one of the main coupling portion and the auxiliary coupling portion of the coupling plate faces the erected portion of the support plate.

7. The lighting device of claim 6,

the upright portion of the support plate has: a fixing portion fixed to at least one of the main coupling portion and the auxiliary coupling portion of the coupling plate by a fixing member; and an engaging portion that engages with at least one of the main coupling portion and the auxiliary coupling portion.

8. A lighting device as recited in any one of claims 1-7,

the light source unit is provided with a light source cover covering the light source module,

the light source cover has: a fixing part fixed on the heat dissipation plate through a fixing part; and an engaging portion engaged with the heat dissipation plate.