Lighting apparatus

Abstract

To provide a luminaire in which a load is not directly applied to a cover while maintaining adhesion between a light-emitting part and a base.SOLUTION: The lighting fixture includes a base having a base fixing hole, a light-emitting unit attached to one surface of the base and having a board insertion hole at a position facing the base fixing hole, a cover covering the light-emitting unit, attached to the one surface of the base, and having a central fixing portion having a cover through hole at a position facing the board insertion hole, a cylindrical portion, and a screw portion having a diameter smaller than that of the cylindrical portion. And a fastening member that is inserted into the base fixing hole, the board insertion hole, and the cover through-hole and fastens the base, the light emitting unit, and the cover, in which the central fixing portion includes a first protruding portion that protrudes from a peripheral edge of the cover through-hole, is inserted into the board insertion hole, and has a distal end facing the base, and a second protruding portion that protrudes on an outer side of the first protruding portion and has a distal end facing the light emitting unit, and an end surface of the cylindrical portion abuts on the base. The distance between the tip of the first protruding portion and the base and the distance between the tip of the second protruding portion and the light-emitting portion are regulated.SELECTED DRAWING: Figure 17

Description

[Technical Field]

[0001] The present disclosure relates to a lighting fixture including a light-emitting unit that emits light. [Background technology]

[0002] Conventionally, lighting fixtures equipped with a light-emitting unit that emits light have been known. Patent Document 1 discloses a lighting fixture equipped with a heat sink, a light-emitting module, and a cover. The light-emitting module has a substrate and a plurality of light-emitting elements mounted on the substrate, and is placed on the heat sink. The cover has a cover portion that covers the light-emitting module, a plurality of lens portions that are integrally provided on the cover portion so as to face the light-emitting elements, a fixing portion that is provided on the cover portion and screwed to the heat sink and presses the inner portion of the substrate against the heat sink, and a pressing portion that presses the outer periphery of the substrate against the heat sink. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6380759 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the lighting fixture disclosed in Patent Document 1, the entire cover is placed on the light-emitting substrate, making it difficult to position the cover and the light-emitting substrate during assembly, and it is not possible to maintain adhesion between the light-emitting unit and the base to which the light-emitting unit is attached, which could put stress on the cover.

[0005] The present disclosure has been made to solve the above-mentioned problems, and provides a lighting device that does not place a direct load on the cover while maintaining close contact between the light-emitting part and the base. [Means for solving the problem]

[0006] a cover that covers the light-emitting unit and is attached to one side of the base and has a central fixing portion that is attached to the one side of the base and has a cover through hole that is formed in a position facing the board insertion hole; and a fastening member that has a cylindrical portion and a threaded portion having a smaller diameter than the cylindrical portion and is inserted into the base fixing hole, the board insertion hole, and the cover through hole to fasten the base, the light-emitting unit, and the cover, wherein the central fixing portion has a first protrusion that protrudes from the periphery of the cover through hole and is inserted into the board insertion hole and has a tip that faces the base, and a second protrusion that protrudes outside the first protrusion and has a tip that faces the light-emitting unit, and the end face of the cylindrical portion abuts against the base, thereby regulating the distance between the tip of the first protrusion and the base and the distance between the tip of the second protrusion and the light-emitting unit. [Effects of the Invention]

[0007] According to the present disclosure, the base, light-emitting unit, and cover are fastened together by a fastening member, thereby maintaining close contact between the light-emitting unit and the base. Furthermore, the end face of the cylindrical portion abuts against the base, thereby restricting the distance between the tip of the first protrusion and the base, and the distance between the tip of the second protrusion and the light-emitting unit. Therefore, the fastening member does not press against the cover. Therefore, close contact between the light-emitting unit and the base is maintained without directly applying a load to the cover. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is an assembled perspective view showing a lighting fixture according to a first embodiment. [Figure 2] 2 is an assembled perspective view of the lighting fixture according to the first embodiment, seen from a different viewpoint from that of FIG. 1. FIG. [Figure 3] 3 is an assembled perspective view of the lighting fixture according to the first embodiment, seen from a different viewpoint from that of FIGS. 1 and 2. FIG. [Figure 4] 1 is an exploded perspective view showing a lighting fixture according to a first embodiment. [Figure 5] 1 is a front view showing a lighting fixture according to a first embodiment. [Figure 6] 1 is a cross-sectional view showing a lighting fixture according to a first embodiment. [Figure 7] 1 is a top view showing a lighting fixture according to a first embodiment. [Figure 8] 2 is a bottom view showing the lighting fixture according to the first embodiment. FIG. [Figure 9] FIG. 1 is an exploded perspective view showing a heat sink according to a first embodiment. [Figure 10] 2 is a perspective view showing a state in which a top plate is removed from the heat sink according to the first embodiment. FIG. [Figure 11] FIG. 2 is a perspective view showing a top plate and a base according to the first embodiment. [Figure 12] FIG. 2 is a perspective view showing a base according to the first embodiment. [Figure 13] 3 is a cross-sectional view showing the periphery of a wiring insertion hole according to the first embodiment. FIG. [Figure 14] 1 is a side view showing a light source unit according to the first embodiment. [Figure 15] FIG. 2 is a perspective view showing a fin according to the first embodiment. [Figure 16] 3 is a cross-sectional view showing the periphery of a wiring insertion hole according to the first embodiment. FIG. [Figure 17] 3 is a cross-sectional view showing the periphery of a central fixed part according to the first embodiment. FIG. [Figure 18] 1 is a perspective view showing a state in which an arm of the lighting fixture according to Embodiment 1 is rotated. FIG. [Figure 19] 1 is a side view showing a state in which the lighting fixture according to Embodiment 1 is attached to a ceiling. [Figure 20] 1 is a side view showing a state in which the lighting fixture according to Embodiment 1 is attached to a wall. [Figure 21] 1 is a side view showing a state in which the lighting fixture according to the first embodiment is attached at an angle to a wall. [Figure 22] FIG. 10 is an assembled perspective view showing a lighting fixture according to a first modified example of the first embodiment. [Figure 23]23 is an assembled perspective view of the lighting fixture according to the first modified example of the first embodiment, seen from a different viewpoint from that of FIG. 22. FIG. [Figure 24] 24 is an assembled perspective view of the lighting fixture according to the first modified example of the first embodiment, seen from a different viewpoint from that of FIGS. 22 and 23. FIG. [Figure 25] FIG. 10 is an exploded perspective view showing a lighting fixture according to a first modified example of the first embodiment. [Figure 26] 10 is a front view showing a lighting fixture according to a first modified example of the first embodiment. FIG. [Figure 27] 10 is a cross-sectional view showing a lighting fixture according to a first modified example of the first embodiment. FIG. [Figure 28] FIG. 10 is a top view showing a lighting fixture according to a first modified example of the first embodiment. [Figure 29] 10 is a bottom view showing a lighting fixture according to a first modified example of the first embodiment. FIG. [Figure 30] FIG. 10 is an exploded perspective view showing a heat sink according to a first modified example of the first embodiment. [Figure 31] FIG. 10 is a perspective view showing a state in which the top plate is removed from the heat sink according to a first modified example of the first embodiment. [Figure 32] 10 is a schematic diagram showing an engaged state between a top-plate-side engaging portion and a base-side engaging portion according to a first modified example of the first embodiment. FIG. [Figure 33] 10 is a schematic diagram showing an engaged state between a top-plate-side engaging portion and a base-side engaging portion according to a first modified example of the first embodiment. FIG. [Figure 34] FIG. 10 is an exploded perspective view showing a lighting fixture according to a second modified example of the first embodiment. [Figure 35] 10 is a front view showing a lighting fixture according to a second modified example of the first embodiment. FIG. [Figure 36] 10 is a side view showing a lighting fixture according to a second modified example of the first embodiment. FIG. [Figure 37] FIG. 10 is a top view showing a lighting fixture according to a second modified example of the first embodiment. [Figure 38] FIG. 10 is a bottom view showing a lighting fixture according to a second modified example of the first embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] Embodiments of a lighting device according to the present disclosure will be described below with reference to the drawings. The present disclosure is not limited to the embodiments described below. The size relationships between components in the following drawings, including FIG. 1, may differ from those in reality. In the following description, terms indicating directions are used as appropriate for ease of understanding. However, these terms are for explanatory purposes and do not limit the present disclosure. Examples of terms indicating directions include "up," "down," "right," "left," "front," and "rear." The width direction of the lighting device is referred to as the first direction, the depth direction of the lighting device is referred to as the second direction, and the height direction of the lighting device is referred to as the third direction. Specifically, the second direction is a direction perpendicular to the third direction and the first direction, the third direction is a direction perpendicular to the first direction and the second direction, and the first direction is a direction perpendicular to the second direction and the third direction.

[0010] Embodiment 1 FIG. 1 is an assembled perspective view showing a lighting fixture 1 according to the first embodiment. FIG. 2 is an assembled perspective view of the lighting fixture 1 according to the first embodiment, seen from a different perspective than that of FIG. 1. FIG. 3 is an assembled perspective view of the lighting fixture 1 according to the first embodiment, seen from a different perspective than that of FIGS. 1 and 2. FIG. 4 is an exploded perspective view of the lighting fixture 1 according to the first embodiment. FIG. 5 is a front view of the lighting fixture 1 according to the first embodiment. FIG. 6 is a cross-sectional view of the lighting fixture 1 according to the first embodiment, taken along line AA in FIG. 5. FIG. 7 is a top view of the lighting fixture 1 according to the first embodiment. FIG. 8 is a bottom view of the lighting fixture 1 according to the first embodiment. As shown in FIGS. 1 to 8, the lighting fixture 1 is attached to a mounting portion 2 (see FIGS. 19 to 21) such as a ceiling or a wall, and includes an arm 100, a connecting member 170, and a light source unit 180. The lighting fixture 1 is attached to a high ceiling, such as in a gymnasium or a warehouse. The lighting fixture 1 may also be attached to a wall, a pillar, a beam, or the like.

[0011] [Arm 100] The arm 100 is attached to the attachment portion 2 and has an inverted U-shape. A light source unit 180 is attached to the arm 100 so as to be rotatable and slidable. The material of the arm 100 can be changed as appropriate depending on the usage environment, but is preferably iron or stainless steel, for example. Stainless steel is particularly used in salt-resistant and corrosion-resistant environments. The material of the arm 100 may also be a material with high thermal conductivity, such as an aluminum alloy. The arm 100 has an arm horizontal portion 110, an arm vertical portion 130, an arm flange portion 140, and a crimp nut 160.

[0012] (Arm horizontal part 110) The arm horizontal section 110 is a plate-like member that is attached to the attachment portion 2 and extends in the first direction. The arm horizontal section 110 has attachment holes 120 formed on both ends for attachment to the attachment portion 2. The distance between the two attachment holes 120 is smaller than the distance between the arm vertical sections 130, and is 150 mm apart, but may be other distances. Screws or hanging bolts are inserted into the attachment holes 120 to attach the arm 100 to the attachment portion 2. Nuts corresponding to the hanging bolts are, for example, M10.

[0013] (Arm vertical part 130) The arm vertical portions 130 are a pair of plate-like members extending downward from both ends of the arm horizontal portion 110, i.e., toward the light source unit 180. An arm connection portion 150, which is a hole used when connecting the light source unit 180, is formed on the lower end side of the two arm vertical portions 130. The shape of the arm connection portion 150 may be round or polygonal. The length between the pair of arm vertical portions 130 is equal to or less than the length between the pair of top-plate-side side portions 420 of the light source unit 180, and they are attached to the inside of the top plate 390. One of the arm vertical portions 130 has an arm marking 131 extending in the vertical direction.

[0014] (Arm flange part 140) The arm flange portion 140 is a portion bent from both ends of the arm horizontal portion 110 and the arm vertical portion 130 in the second direction in a direction opposite to the attachment portion 2. The arm flange portion 140 is provided continuously from the arm horizontal portion 110 to the arm vertical portion 130, thereby increasing the rigidity of the arm 100 without increasing the plate thickness. The arm flange portion 140 of the arm vertical portion 130 is preferably provided up to the vicinity of the arm connection portion 150 as long as it does not interfere with the light source unit 180 during rotation. If the arm vertical portion 130 is provided outside the base 310 of the light source unit 180, it will interfere during rotation, so the arm flange portion 140 cannot be provided in the interfering portion. In the first embodiment, the arm vertical portion 130 is provided inside the top plate 390, and therefore there are no interfering peripheral components nearby. Therefore, the arm flange portion 140 is provided up to the vicinity of the arm connection portion 150, thereby improving the rigidity of the arm 100.

[0015] (Caulking nut 160) The crimp nut 160 is inserted into the arm connection part 150, and is deformed by the application of an external force using a special tool, thereby being fixed to the arm vertical part 130. The crimp nut 160 has an internal thread, which allows the connection member 170, which is an external thread, to be directly fixed thereto.

[0016] [Connecting member 170] The connecting member 170 is inserted into the top plate-side insertion hole 450 of the top plate 390 and the base-side insertion hole 380 of the base 310, and is screwed into the crimp nut 160 of the arm 100, thereby attaching the top plate 390 and the base 310 to the arm 100. The connecting member 170 is a male screw also called an arm bolt. When the connecting member 170 is loosened, the arm 100 can move horizontally relative to the light source unit 180 and can also rotate around the arm connection part 150 as an axis. The bolt size of the connecting member 170 is, for example, M10, the same as a hanging bolt.

[0017] [Light source unit 180] The light source unit 180 is rotatably and slidably attached to the arm 100 by a connecting member 170, and irradiates light onto an irradiation target. The light source unit 180 is attached to the arm 100 by inserting the connecting member 170 into a top plate-side through-hole 450 of the top plate 390 and a base-side through-hole 380 of the base 310, and screwing it into the crimping nut 160 of the arm 100. The light source unit 180 has a heat sink 260, the top plate 390, a support bracket 460, a power source 500, a light emitter 230, a cover 190, and a fastening member 224.

[0018] (heat sink 260) FIG. 9 is an exploded perspective view showing the heat sink 260 according to the first embodiment. FIG. 10 is a perspective view showing the heat sink 260 according to the first embodiment with the top plate 390 removed. The heat sink 260 is a heat dissipation member on whose surface the light-emitting unit 230 is attached and which dissipates heat generated by the light-emitting unit 230. The heat sink 260 is an aluminum sheet metal with excellent heat dissipation properties. The surface of the heat sink 260 is anodized to ensure corrosion resistance and heat dissipation properties. Note that a low-output lighting fixture 1 does not need to use the heat sink 260 because the temperature rise due to the light emission from the light-emitting element 250 is limited. As shown in FIGS. 9 and 10 , the heat sink 260 has a base 310 and fins 270.

[0019] (Base 310) FIG. 11 is a perspective view showing a top plate 390 and a base 310 according to the first embodiment. FIG. 12 is a perspective view showing the base 310 according to the first embodiment. As shown in FIGS. 11 and 12, the base 310 has a U-shaped cross section and dissipates heat from the light-emitting unit 230. The light-emitting substrate 240 of the light-emitting unit 230, which is a heat source, is mounted on the base 310, and therefore the base 310 is preferably made of aluminum, which has good heat dissipation properties. The thinner the base 310, the more effectively the mass of the lighting fixture 1 can be reduced. However, a certain thickness is required in consideration of rigidity, heat dissipation, and the fixing strength of the fastening components. The thickness of the base 310 depends on the size and mass of the light source unit 180, but is preferably between 1.2 mm for low-power classes and 3.0 mm for high-power classes. The base 310 has a base-side flat surface portion 320 and a base-side side surface portion 350.

[0020] (Base side flat surface portion 320) The base-side flat surface 320 is a rectangular metal plate, and the light-emitting substrate 240 and cover 190 of the light-emitting unit 230 are attached to its lower surface facing each other. The base-side flat surface 320 connects the lower ends of two base-side side surfaces 350 that stand upright from both ends of the base-side flat surface 320 in the first direction. A threaded base fixing hole 321 is formed in the base-side flat surface 320. A protrusion 330 that protrudes upward is provided on the upper surface of the base-side flat surface 320. The protrusion 330 is used to attach the fin 270 to the upper surface of the base-side flat surface 320, and is provided at a position facing the fin insertion hole 300 (see FIG. 15 ) of the fin 270. When an external force is applied after the protrusion 330 is inserted into the fin insertion hole 300 of the fin 270, the tip of the protrusion 330 is deformed. The deformed portions sandwich the fin-side flat surface portions 280 (see FIG. 15 ) of the fins 270, thereby fixing the fins 270 to the base-side flat surface portion 320. For the purpose of ensuring reliable positioning of the fins 270 and securing fixing strength, it is preferable that the protrusions 330 are provided in two or more locations facing the fins 270 for each fin-side flat surface portion 280 of the fins 270.

[0021] FIG. 13 is a cross-sectional view showing the periphery of the wire insertion hole 340 according to the first embodiment. As shown in FIG. 13, the base-side flat surface portion 320 is formed with the wire insertion hole 340, through which a wire (not shown) connecting the power source 500 and the light-emitting substrate 240 is inserted. The light-emitting substrate 240 side of the wire insertion hole 340 is chamfered to prevent cuts from occurring when the wire comes into direct contact with the light-emitting substrate 240. The diameter of the wire insertion hole 340 is set to be larger than the diameter of the wire so as not to impede the operation of the wire when it is inserted into the wire insertion hole 340 and connected to a connector provided on the light-emitting substrate 240. Note that if the diameter of the wire insertion hole 340 is too large, dust and insects can easily enter the cover 190. Therefore, the cover 190 and the support bracket 460, which are fixed after connection, cover a portion of the wire insertion hole 340, thereby minimizing the opening in the finished product.

[0022] A base-side bent portion 360 extending downward is provided in a portion of the base-side flat surface portion 320 that is not connected to the base-side side surface portion 350. That is, the base-side bent portion 360 is provided at both ends of the plane of the base-side flat surface portion 320 that are perpendicular to the both ends where the base-side side surface portion 350 is provided. The base-side bent portion 360 improves rigidity while preventing the mating surface between the base-side flat surface portion 320 and the cover 190 from being exposed, thereby suppressing direct contact with dust and moisture.

[0023] (Base side side portion 350) The base-side side surface portion 350 is a pair of plate-like members extending from both ends of the base-side flat surface portion 320. The base-side flat surface portion 320 and the base-side side surface portion 350 are formed by bending a single sheet of metal. Because the base-side side surface portion 350 is configured continuously with the base-side flat surface portion 320, it is not necessary to configure the base-side side surface portion 350 as a separate part, thereby reducing investment costs and assembly processes. Furthermore, because the base-side side surface portion 350 is not a separate part, it is possible to prevent external forces such as vibrations from concentrating on fastening parts and causing loosening. The height of the base-side side surface portion 350 is highest at the part where the arm 100 is attached, and then slopes downward from that height, becoming lower at other parts. The base-side side surface portion 350 is configured by cutting the metal sheet at locations where the external force from the arm 100 is not directly applied, thereby reducing the mass of the lighting fixture 1.

[0024] Furthermore, the gently sloping upper end of the base-side side surface portion 350 reduces stress compared to a vertically cut base. The angle of inclination of the upper end of the base-side side surface portion 350 is preferably 45°. A base marking 351 is provided at the top center of the base-side side surface portion 350 so that the angle of the arm 100 when attached to the attachment portion 2 can be visually confirmed. By aligning the base marking 351 with the arm marking 131, the angle of the arm 100 can be appropriately adjusted.

[0025] The base-side side surface portion 350 is provided with a base-side fastening portion 370. The base-side fastening portion 370 is formed by cutting and raising a portion of the base-side side surface portion 350 from the base-side flat surface portion 320 toward the erection direction of the fins 270 at a position higher than the height of the fins 270 at which the fins 270 and the top plate 390 do not interfere with each other. The base-side fastening portion 370 is parallel to the base-side flat surface portion 320. The base-side fastening portion 370 is formed with a base-side fastening hole 371 used to fasten the top plate 390. Because the base-side fastening portion 370 is provided parallel to the base-side flat surface portion 320, the fastening directions of all fastening parts are oriented toward the light-emitting unit 230. This eliminates the need to change the orientation of tools when placing and fastening the top plate 390, improving assembly ease.

[0026] (Base side insertion hole 380) FIG. 14 is a side view showing the light source unit 180 according to the first embodiment. As shown in FIG. 14, the base-side insertion holes 380 are openings attached to the arm vertical portion 130 of the arm 100 and extending in the second direction. The pair of base-side insertion holes 380 are formed symmetrically at a position higher than the top-plate-side flat portion 400 when the top plate 390 is disposed. A base-side step portion 380a, which is an arc-shaped recess, is formed at the top of the base-side insertion holes 380. The connecting member 170 fits into the base-side step portion 380a due to the weight of the top plate 390, thereby preventing the connecting member 170 from moving inadvertently. In this way, the base-side step portion 380a is formed to adjust the angle of the light source unit 180 and to fix the connecting member 170. The base-side insertion holes 380 are formed to overlap with the top-plate-side insertion holes 450 of the top plate 390.

[0027] The base-side step portion 380a is made up of a base-side central step portion 381 located in the center of the base-side side surface portion 350, and a base-side end step portion 382 located at the end of the base-side insertion hole 380. The base-side central step portion 381 is a portion that serves as the rotation axis of the light source unit 180 when the mounting portion 2 is a ceiling, and the base-side end step portion 382 is a portion that serves as the rotation axis of the light source unit 180 when the mounting portion 2 is a wall.

[0028] As described above, the base 310 has a base-side side surface portion 350 and a base-side flat surface portion 320. The base-side side surface portions 350 are a pair of members attached to each arm vertical portion 130 of the arm 100, and each have a base-side insertion hole 380 formed therein and extending in a direction perpendicular to one direction. The base-side flat surface portion 320 connects the pair of base-side side surfaces 350, and has the light-emitting unit 230 attached to one surface on the side opposite the arm horizontal portion 110.

[0029] (Fin 270) FIG. 15 is a perspective view showing the fin 270 according to the first embodiment. As shown in FIG. 15, the fin 270 has a U-shaped cross section and is a bent piece of sheet metal. The fin 270 is made of aluminum, which has good heat dissipation properties. The thickness of the fin 270 does not significantly affect heat dissipation, but must be appropriately set taking into account mass and external forces such as contact or wind pressure. From the standpoints of heat dissipation and rigidity, the thickness of the fin 270 is preferably 0.5 mm. The fin 270 is provided on the surface of the base-side flat surface portion 320 opposite the surface on which the light-emitting substrate 240 is attached. The fin 270 promotes heat dissipation by increasing the sheet metal area near the heat-generating portion. The fins 270 are arranged parallel to the base-side side surface portion 350 and spaced apart from each other. The fin 270 includes a fin-side flat surface portion 280 and a fin-side standing portion 290.

[0030] (Fin side flat surface portion 280) The fin-side flat surface 280 is a plate-like member extending in the second direction that is attached to and abuts against the base-side flat surface 320. The base-side flat surface 320 has fin insertion holes 300 formed therein, into which protrusions 330 provided on the base-side flat surface 320 are inserted. After the protrusions 330 are inserted into the fin insertion holes 300 of the fins 270, an external force is applied to crimp the protrusions 330, causing the tips of the protrusions 330 to deform and clamp and fix the fin-side flat surface 280.

[0031] (Fin side standing portion 290) The fin-side upright portions 290 are a pair of plate-like members erected from both ends of the fin-side flat surface portion 280 in the first direction. Heat generated from the light-emitting portion 230 is transferred to the base-side flat surface portion 320 and then reaches the fin-side upright portions 290 via the fin-side flat surface portion 280, where it is efficiently dissipated. The higher the height of the fin-side upright portions 290, the greater the heat dissipation area, improving heat dissipation performance. However, the height is set appropriately to an optimal value for the heat generated by each luminous flux class. This allows the volume and mass of the lighting fixture 1 to be reduced. The higher the luminous flux class, the higher the height of the fin-side upright portions 290. The lower the output class, the lower the height of the fin-side upright portions 290. Note that if the output class is significantly low, the fins 270 themselves are unnecessary. The fin-side upright portions 290 are arranged at optimal equal intervals so as not to hinder each other's heat dissipation. A groove 291 is formed in the center of the fin-side standing portion 290, recessed to a height lower than the fin-side standing portion 290.

[0032] (Tabletop 390) 9 and 11, the top plate 390 has a U-shaped cross section with an opening formed on the upper side, and dissipates heat from the light-emitting unit 230. The power supply 500 is placed on the top plate 390, and is spaced apart from the fins 270 provided on the base 310. This prevents heat dissipated from the fins 270 from being directly transferred to the top plate 390. The top plate 390 is preferably made of an aluminum material, which has good heat dissipation properties. The top plate 390 has a top-plate-side flat portion 400 and a top-plate-side side portion 420.

[0033] (Top plate side flat portion 400) The top-side flat surface 400 is a rectangular metal plate, and the power supply 500 is placed on its upper surface. The underside of the top-side flat surface 400 is spaced apart from the fins 270. In a lighting fixture 2000 (see FIG. 34 ) that does not include the fins 270, a support bracket 460 is provided on the upper surface to prevent the power supply 500 from being subjected to heat from the base-side flat surface 320, and the light-emitting substrate 240 and cover 190 are provided on the lower surface. The top-side flat surface 400 corresponds to a shade in the heat sink 260, and prevents dust from accumulating on the fins 270, which could reduce the heat dissipation performance of the fins 270.

[0034] Heat dissipation holes 410, which are elongated holes extending along the second direction, which is the longitudinal direction of the power source 500, are formed at both ends of the top panel flat surface 400 in the first direction. Note that the heat dissipation holes 410 are not formed in a lighting fixture 2000 (see FIG. 34 ) that does not include the fins 270. The heat dissipation holes 410 allow the hot air dissipated by the fins 270 to pass through and dissipate it to the outside of the light source unit 180. The heat dissipation holes 410 are not limited to a rectangular shape, but may also be circular, and multiple heat dissipation holes 410 may be formed along the first direction and the second direction. The top panel flat surface 400 is formed with top panel-side fastening holes 440 that are holes facing the base-side fastening holes 371 of the base-side fastening portion 370. The top panel 390 and the base 310 are fixed together by inserting screws into the top panel-side fastening holes 440 and the base-side fastening holes 371.

[0035] A top-plate-side bent portion 430 extending downward is provided in a portion of the top-plate-side flat portion 400 that is not connected to the top-plate-side side portion 420. That is, the top-plate-side bent portion 430 is provided at both ends of the top-plate-side flat portion 400 that are at positions perpendicular to both ends where the top-plate-side side portion 420 is provided. The top-plate-side bent portion 430 improves rigidity while preventing the fins 270 from being exposed, thereby preventing other parts from coming into contact with the fins 270.

[0036] (Top plate side portion 420) The top-side side surface portion 420 is a pair of plate-like members extending from both ends of the top-side flat surface portion 400. The top-side flat surface portion 400 and the top-side side surface portion 420 are formed by bending a single sheet of metal. The height of the top-side side surface portion 420 is highest at the portion where the arm 100 is attached, and slopes downward from that highest point, becoming lower at other portions. The top-side side surface portion 420 is formed by cutting the metal sheet at a location where it is not directly subjected to external force from the arm 100, thereby reducing the mass of the lighting fixture 1. Furthermore, the gently sloping upper end of the top-side side surface portion 420 reduces stress compared to a base cut vertically. The inclination angle of the upper end of the top-side side surface portion 420 is preferably 45°.

[0037] The outer dimension, which is the width between the top-plate-side side portions 420, is smaller than the inner dimension, which is the width between the base-side side portions 350 (outer dimension<inner dimension). In other words, the top-plate-side side portion 420 is disposed inside the base-side side portion 350. A top-plate marking 421 is provided on one slope of the top-plate-side side portion 420 so that the angle of the arm 100 when attached to the attachment portion 2 can be visually confirmed when the attachment portion 2 is a wall, pillar, beam, or the like. When the top plate 390 and the base 310 are stacked, only the slope with the top-plate marking 421 is exposed. This allows the same top-plate marking 421 to be used in both the lighting fixture 1 that is provided with the fins 270 and the lighting fixture 2000 that does not include the fins 270 (see FIG. 34).

[0038] (Top plate insertion hole 450) The tabletop-side through-holes 450 are openings attached to the arm vertical portion 130 of the arm 100 and extending in the second direction. The pair of tabletop-side through-holes 450 are formed symmetrically at a position higher than the tabletop-side flat portion 400. As shown in FIG. 14 , a tabletop-side step portion 450a, which is an arc-shaped recess, is formed at the top of the tabletop-side through-hole 450. The connecting member 170 fits into the tabletop-side step portion 450a due to the weight of the tabletop 390, thereby preventing the connecting member 170 from moving inadvertently. In this way, the tabletop-side step portion 450a is formed to adjust the angle of the light source unit 180 and fix the connecting member 170. The tabletop-side through-holes 450 are formed to overlap with the base-side through-hole 380 of the base 310. The top-board-side step portion 450a is made up of a top-board-side central step portion 451 located in the center of the top-board-side side portion 420 and a top-board-side end step portion 452 located at the end of the top-board-side insertion hole 450.

[0039] The top-plate-side central step portion 451 is a portion that serves as the rotation axis of the light source unit 180 when the attachment portion 2 is a ceiling, and the top-plate-side end-side step portion 452 is a portion that serves as the rotation axis of the light source unit 180 when the attachment portion 2 is a wall, a pillar, a beam, or the like. The top-plate-side central step portion 451 extends upward further than the base-side central step portion 381. In other words, the top-plate-side through-hole 450 extends in the same direction as the base-side through-hole 380 and is longer in the height direction than the base-side through-hole 380.

[0040] In this way, the top plate 390 has a pair of top plate side side portions 420 attached to each arm vertical portion 130 of the arm 100 and having top plate side insertion holes 450 extending in a direction perpendicular to one direction, and a top plate side flat portion 400 connecting the pair of top plate side side portions 420.

[0041] (Connection between the top plate 390 and the base 310 and the arm 100) As shown in FIG. 1, the base 310 and the top plate 390 are attached to the arm vertical portion 130 of the arm 100 with the base-side insertion hole 380 and the top plate-side insertion hole 450 overlapping. The arm vertical portion 130 is rotatably attached to the base-side side surface portion 350 of the base 310. The arm vertical portion 130 rotates relative to the base-side side surface portion 350 when it moves from the base-side central step portion 381 at the center to the base-side end step portion 382 at the end in the base-side insertion hole 380 shown in FIG. 14. At the same time, the arm vertical portion 130 rotates relative to the top plate-side side surface portion 420 when it moves from the top plate-side central step portion 451 at the center to the top plate-side end step portion 452 at the end in the top plate-side insertion hole 450 shown in FIG. 14.

[0042] (Support bracket 460) As shown in FIG. 4 , the support bracket 460 is a box-shaped member having a rectangular parallelepiped shape, and is a bracket that secures the base-side flat surface portion 320 and the top-plate-side flat surface portion 400. The support bracket 460 is made of aluminum, which has high heat dissipation properties. The support bracket 460 is formed, for example, by bending a single sheet of metal. The support bracket 460 has a support bottom surface portion 470, a support top surface portion 480, and a support side surface portion 490. The support bottom surface portion 470 is a plate-shaped member that is attached to the base-side flat surface portion 320. The tip of the support bottom surface portion 470 covers a portion of the wiring insertion hole 340 formed in the base-side flat surface portion 320, thereby preventing foreign matter such as dust and insects from entering the wiring insertion hole 340. The tip of the support bottom surface portion 470 is chamfered to prevent cuts if the wiring comes into direct contact with it.

[0043] The support top surface portion 480 is provided opposite the support bottom surface portion 470 and is a plate-like member to which the underside of the top-panel-side flat surface portion 400 is attached. The support side surface portion 490 is a plate-like member that connects the support bottom surface portion 470 and the support top surface portion 480 and is provided vertically. The support side surface portion 490 has multiple support side surface holes that are used to attach optional components such as sensors, cameras, or communication modules. Wiring that electrically connects the light-emitting substrate 240 and the power source 500 is provided near the support side surface portion 490 on the fin 270 side, and the support side surface portion 490 covers the wiring. The support side surface portion 490 prevents lighting failures caused by external forces such as wire contact and wire pulling, and prevents deterioration of the wiring coating due to direct sunlight. The main function of the support bracket 460 is to cover and hide the wiring, and it is not limited to a configuration in which the support upper surface portion 480 is attached to the underside of the top plate side flat surface portion 400, and the support upper surface portion 480 and the top plate side flat surface portion 400 may be spaced apart.

[0044] Fig. 16 is a cross-sectional view showing the periphery of the wire insertion hole 340 according to the first embodiment. As shown in Fig. 16, the end of the support bottom surface portion 470 of the support bracket 460 on the fin 270 side covers a part of the wire insertion hole 340 of the base-side flat surface portion 320. In other words, the distance B between the end of the support bottom surface portion 470 and the edge of the wire insertion hole 340 is smaller than the diameter A of the wire insertion hole 340. As a result, when a wire is inserted into the wire insertion hole 340, the support bottom surface portion 470 makes it difficult for the wire to come out.

[0045] (power supply 500) As shown in FIG. 4 , the power supply 500 is a DC power supply device that converts AC voltage supplied from an external commercial power source into DC voltage and causes the light-emitting unit 230 to emit light. The power supply 500 is placed on the upper surface of the top plate 390, which is located on the upper surface side of the base 310, and extends along the second direction. The power supply 500 includes a power supply board 510, a case bottom 520, a case top 530, a power terminal block 540, a terminal block mounting bracket 550, and a terminal block cover 560. The power supply board 510 converts AC voltage into DC voltage and supplies it to the light-emitting board 240. The power supply board 510 is placed on the upper surface of the case bottom 520. The case bottom 520 forms the lower part of the power supply 500 and is made of aluminum, which has high heat dissipation properties. The bottom surface of the case bottom 520 is placed on the upper surface of the top plate-side flat portion 400 of the lighting fixture 1, which has fins 270. The bottom surface of case bottom 520 is disposed across the upper surfaces of a plurality of support fittings 2460 in lighting fixture 2000 (see FIG. 34) that does not have fins 270.

[0046] The case top 530 is a member provided to cover the power supply board 510 and the case bottom 520, and is made of aluminum or steel plate. The case top 530 is attached to a fixing hole in the top plate 390 of a lighting fixture 1 having fins 270. The case top 530 is attached to a fixing hole on the top surface of the support bracket 2460 of a lighting fixture 2000 (see FIG. 34 ) that does not have fins 270. The width of the case top 530 in the first direction, which is the short side direction, is shorter than the distance between the mounting holes 120 of the arm 100. That is, the width of the power supply 500 in the first direction is within the distance between the mounting holes 120 of the arm 100. The power supply terminal block 540 is electrically connected to the power supply board 510 by wiring. AC voltage is input to the power supply terminal block 540 by connecting wiring from an external commercial power source. The power supply terminal block 540 is provided at the longitudinal end of the power supply 500, making it easy to operate the power tool.

[0047] The terminal block mounting bracket 550 is attached to the power supply board 510 and is a member that secures the power supply terminal block 540. The terminal block mounting bracket 550 is preferably made of steel plate so that it can withstand the load when wiring is inserted into the power supply terminal block 540. The terminal block cover 560 is box-shaped and made of steel plate. The terminal block cover 560 is attached to the case top 530 and is a member that covers the terminal block cover 560. By loosening the screws on the terminal block cover 560, it rotates, exposing the portion of the power supply terminal block 540 where the wiring is connected. After the wiring is connected to the power supply terminal block 540, the screws on the terminal block cover 560 are tightened to prevent dust from accumulating on the portion where the wiring is connected.

[0048] (Light emitting unit 230) 4, the light emitting unit 230 is electrically connected to the power source 500 by wiring, and emits light to an irradiation target. The light emitting unit 230 has a light emitting substrate 240 and a light emitting element 250.

[0049] (light emitting substrate 240) The light emitting substrate 240 is a rectangular plate-like member. The light emitting substrate 240 may be circular or polygonal. A plurality of light emitting elements 250 are mounted on the lower surface of the light emitting substrate 240, and the upper surface of the light emitting substrate 240 is attached to the base-side flat surface portion 320 of the base 310. A substrate insertion hole 241 necessary for positioning the light emitting substrate 240 opposite the central fixing portion 220 of the cover 190 is formed in the center of the light emitting substrate 240.

[0050] (Light emitting element 250) A plurality of light-emitting elements 250 are mounted on the lower surface of the light-emitting substrate 240. The light-emitting elements 250 are mounted so as to avoid the substrate insertion holes 241 of the light-emitting substrate 240. The light-emitting elements 250 are surface-mounted pseudo-white LED elements packaged by disposing a phosphor that converts the wavelength of the blue light to yellow light on an LED chip that emits blue light with a wavelength of 440 to 480 nm. Note that the light-emitting elements 250 may be solid-state lasers, semiconductor lasers, organic electroluminescence (EL), inorganic EL, or the like.

[0051] (Cover 190) As shown in FIG. 4 , the cover 190 covers the entire light-emitting substrate 240 and has a rectangular shape. Polycarbonate, acrylic resin, or the like is used as a material for the cover 190 depending on the usage environment. The height of the cover 190 is minimized to reduce the overall height of the lighting fixture 1. The cover 190 has a lens 200, a peripheral fixing portion 210, and a central fixing portion 220. The lens 200 efficiently extracts light emitted from the light-emitting elements 250 and has a conical shape. The shape of the lens 200 controls the light distribution angle. The number of lenses 200 provided is equal to the maximum number of light-emitting elements 250 mounted on the light-emitting substrate 240. The lenses 200 are provided directly below the light-emitting elements 250 so as to pair with the light-emitting elements 250 mounted on the light-emitting substrate 240. The peripheral fixing portions 210 are provided at four corners of the cover 190 and at four central locations between the corners, and are fixed with a plurality of screws so as to reduce the gap between the cover 190 and the base 310.

[0052] (Central fixed part 220) 17 is a cross-sectional view showing the periphery of the central fixing portion 220 according to the first embodiment. As shown in FIG. 17, the central fixing portion 220 is provided in the center of the cover 190, and is a portion to which the cover 190, the light emitting substrate 240, and the base 310 are fixed. The central fixing portion 220 has a cover through-hole 223 into which a fastening member 224 is inserted. The central fixing portion 220 has a first protrusion 221 and a second protrusion 222. The first protrusion 221 is a cylindrical portion that protrudes from the periphery of the cover through-hole 223, is inserted into the substrate insertion hole 241, and has a tip that faces the base 310. The second protrusion 222 is a cylindrical portion that protrudes outside the first protrusion 221, and has a tip that faces the light emitting portion 230.

[0053] The outer diameter of the first protrusion 221 is smaller than the inner diameter of the board insertion hole 241 of the light emitting board 240. This allows the first protrusion 221 to be inserted into the board insertion hole 241. By minimizing the gap between the diameters, the light emitting board 240 is guided when the first protrusion 221 is inserted, preventing misalignment between the light emitting element 250 and the lens 200. The second protrusion 222 is provided so as to be substantially flush with the light emitting board 240, minimizing the gap between the light emitting board 240 and the base 310 and preventing a decrease in heat dissipation. Note that a small gap is formed between the tip of the second protrusion 222 and the light emitting board 240, thereby reducing the load on the cover 190. Similarly, a small gap is formed between the tip of the first protrusion 221 and the base 310, thereby reducing the load on the cover 190.

[0054] (fastening member 224) As shown in FIG. 17 , the fastening member 224 is a member provided on the central fixing portion 220 and includes a cylindrical portion 225 and a threaded portion 226 having a diameter smaller than that of the cylindrical portion 225. The fastening member 224 is, for example, a shoulder screw. The fastening member 224 is inserted into the cover through-hole 223, the substrate insertion hole 241, and the base fixing hole 321 to fix the cover 190, the light emitting substrate 240, and the base 310. The axial end face of the cylindrical portion 225 of the central fixing portion 220 abuts against the base 310, thereby restricting the distance between the tip of the first protrusion 221 and the base 310 and the distance between the tip of the second protrusion 222 and the light emitting portion 230. Therefore, no direct stress is applied to the cover 190. This prevents damage to the cover 190 due to oil crazing, while enabling the light emitting substrate 240 to be positioned, and preventing the light emitting substrate 240 from floating relative to the base 310.

[0055] According to the first embodiment, the base 310, the light-emitting unit 230, and the cover 190 are fastened together by the fastening member 224, so that the tight contact between the light-emitting unit 230 and the base 310 can be maintained. Furthermore, the axial end face of the cylindrical portion 225 abuts against the base 310, thereby restricting the distance between the tip of the first protruding portion 221 and the base 310, and the distance between the tip of the second protruding portion 222 and the light-emitting unit 230. Therefore, the fastening member 224 does not press the cover 190. Therefore, the tight contact between the light-emitting unit 230 and the base 310 can be maintained without applying a load directly to the cover 190.

[0056] FIG. 18 is a perspective view showing a rotated state of the arm 100 of the lighting device 1 according to the first embodiment. As described above, as shown in FIG. 18, the width B of the power source 500 in one direction (first direction) is within the width A between the mounting holes 120. The arm vertical portion 130 rotates relative to the base-side side surface portion 350 after moving from the base-side central step portion 381 at the center to the base-side end step portion 382 at the end in the base-side insertion hole 380 shown in FIG. 14. At the same time, the arm vertical portion 130 rotates relative to the top-plate-side side surface portion 420 after moving from the top-plate central step portion 451 at the center to the top-plate end step portion 452 at the end in the top-plate-side insertion hole 450 shown in FIG. 14. As a result, the extension direction of the arm vertical portion 130 and the extension direction of the power source 500 become parallel, as shown in FIG. 18. Furthermore, there is a working space of width C between both ends of the power source 500 in the first direction and the top-plate-side side surface portion 420 of the top plate 390.

[0057] According to the first embodiment, the width of the power supply 500 in one direction is contained between the mounting holes 120 of the arm horizontal portion 110 of the arm 100. Therefore, there is a space on the side of the arm 100 opposite the mounting portion 2. Therefore, it is possible to use a long tool such as a power tool, and the mounting tool can be fixed to the mounting portion 2 without changing it.

[0058] FIG. 19 is a side view showing the lighting fixture 1 according to embodiment 1 attached to a ceiling. FIG. 20 is a side view showing the lighting fixture 1 according to embodiment 1 attached to a wall. FIG. 21 is a side view showing the lighting fixture 1 according to embodiment 1 attached to a wall at an angle. As shown in FIG. 19, when the attachment target 2 is a ceiling, the arm vertical portion 130 is attached to the base-side central step portion 381 of the base-side insertion hole 380 and the top-plate-side central step portion 451 of the top-plate-side insertion hole 450. In contrast, as shown in FIGS. 20 and 21, when the attachment target 2 is a wall, the arm vertical portion 130 is attached to the base-side end-side step portion 382 of the base-side insertion hole 380 and the top-plate-side end-side step portion 452 of the top-plate-side insertion hole 450. The attachment target 2 is not limited to a wall, and may be any object that extends in the vertical direction, such as a pillar or a beam.

[0059] According to the first embodiment, the vertical portion of the arm 100 rotates relative to the base-side side surface portion 350 after moving from the center to the end in the base-side insertion hole 380. As a result, the extension direction of the arm vertical portion 130 and the extension direction of the power source 500 become parallel. This makes it possible to reduce the packaging size. Furthermore, since the rotation angle of the arm 100 is highly flexible, it can be mounted on a wall. In other words, it is possible to reduce the packaging size and mount it on a wall while suppressing the number of steps and costs.

[0060] (First Modification) FIG. 22 is an assembled perspective view of lighting fixture 1000 according to a first modified example of embodiment 1. FIG. 23 is an assembled perspective view of lighting fixture 1000 according to the first modified example of embodiment 1, seen from a different perspective than that of FIG. 22. FIG. 24 is an assembled perspective view of lighting fixture 1000 according to the first modified example of embodiment 1, seen from a different perspective than that of FIGS. 22 and 23. FIG. 25 is an exploded perspective view of lighting fixture 1000 according to the first modified example of embodiment 1. FIG. 26 is a front view of lighting fixture 1000 according to the first modified example of embodiment 1. FIG. 27 is a cross-sectional view of lighting fixture 1000 according to the first modified example of embodiment 1, taken along line AA in FIG. 26. FIG. 28 is a top view of lighting fixture 1000 according to the first modified example of embodiment 1. FIG. 29 is a bottom view of lighting fixture 1000 according to the first modified example of embodiment 1. FIG. 30 is an exploded perspective view of heat sink 260 according to the first modified example of embodiment 1. FIG. 31 is a perspective view of heat sink 260 according to the first modified example of embodiment 1 with top plate 390 removed. The first modified example differs from the first embodiment in the method of connecting the base 310 and the top plate 390. As shown in FIGS. 22 to 31, four base-side engaging portions 1370 are formed along the second direction on the base-side side surface portion 350 of the base 310. The base-side engaging portions 1370 are, for example, holes. Note that the base-side fastening portions 370 are not provided on the base-side side surface portion 350.

[0061] Four top-plate-side engaging portions 1440 are provided on the top-plate-side side surface portion 420 of the top plate 390 along the second direction. The top-plate-side engaging portions 1440 are crescent-shaped embossments, and the bottom sides of the four top-plate-side engaging portions 1440 are alternately arranged. This prevents the top plate 390 and the base 310 from moving toward the mounting portion 2 and the light-emitting portion 230 when the top plate 390 and the base 310 are mated. The top-plate-side engaging portions 1440 are not limited to a crescent shape, and may be arch-shaped or circular. In the first modified example, the top-plate-side engaging portions 1440 protrude outward from the light source unit 180, but may also protrude inward from the light source unit 180. However, the top-plate-side engaging portions 1440 need to be appropriately positioned so that they do not enter the movement range of the arm 100 and interfere with its movement. The top-plate-side flat surface portion 400 does not have the top-plate-side fastening holes 440 formed therein.

[0062] FIG. 32 is a schematic diagram showing an engagement state between a top-plate-side engaging portion 1440 and a base-side engaging portion 1370 according to a first modified example of the first embodiment. FIG. 33 is a schematic diagram showing an engagement state between a top-plate-side engaging portion 1440 and a base-side engaging portion 1370 according to a first modified example of the first embodiment. The position of the top plate 390 on the base 310 is restricted by the engagement between the top-plate-side engaging portion 1440 and the base-side engaging portion 1370. As shown in FIG. 32, when the top plate 390 is positioned above the base 310, the top-plate-side engaging portion 1440 slides into the base-side engaging portion 1370. As a result, as shown in FIG. 33, elastic deformation of the base 310 occurs, and the base 310 and the top plate 390 are engaged and fixed together. When the top-plate-side engaging portion 1440 is crescent-shaped, it slides easily against the elastic deformation of the base 310 caused by the sliding during engagement, allowing for engagement without resistance. Alternatively, the top-plate-side engaging portion 1440 may be a hole, and the base-side engaging portion 1370 may be an embossment.

[0063] According to the first modification, the top-plate engaging portion 1440 provided on the top-plate side surface portion 420 engages with the base-side engaging portion 1370 provided on the base-side side surface portion 350, thereby restricting the position of the top plate 390 relative to the base 310. In this manner, the base 310 and the top plate 390 can be fixed together without using screws. Therefore, there is no need to consider the direction or number of screws. This improves assembly efficiency and reduces assembly man-hours. The engagement between the top-plate engaging portion 1440 and the base-side engaging portion 1370 eliminates the risk of loosening due to concentrated loads on the fixed portions caused by external forces such as vibrations due to fastening. However, if the dimensions of the base 310 and the top plate 390 are not accurate, the connecting member 170 may come loose when loosening. Therefore, instead of using only fastening or only engaging fixation, a combination of fastening and engaging fixation may be used, such as by using engaging fixation only in areas subject to large external loads.

[0064] (Second Modification) FIG. 34 is an exploded perspective view showing lighting fixture 2000 according to a second modified example of embodiment 1. FIG. 35 is a front view showing lighting fixture 2000 according to the second modified example of embodiment 1. FIG. 36 is a side view showing lighting fixture 2000 according to the second modified example of embodiment 1. FIG. 37 is a top view showing lighting fixture 2000 according to the second modified example of embodiment 1. FIG. 38 is a bottom view showing lighting fixture 2000 according to the second modified example of embodiment 1. As shown in FIGS. 34 to 38, the second modified example differs from embodiment 1 in that fin 270 is not provided. Light-emitting unit 230, which is attached to base-side flat surface portion 320 of base 310 in embodiment 1, is attached to top-plate-side flat surface portion 400 of top plate 390. In this way, light-emitting unit 230 is detachably attached to top plate 390 and base 310. Furthermore, the second modified example differs from embodiment 1 in the shape of support bracket 2460.

[0065] The support bracket 2460 is a bracket that secures the top-panel-side flat portion 400 and the power supply 500. The support bracket 2460 is made of aluminum, which has high heat dissipation properties. The support bracket 2460 is formed, for example, by bending a single piece of sheet metal. The support bracket 2460 has a support bottom portion 2470, a support top portion 2480, and a support side portion 2490. The support bottom portion 2470 is a plate-shaped member that is attached to the top-panel-side flat portion 400. The tip of the support bottom portion 2470 covers a portion of the wiring insertion hole formed in the top-panel-side flat portion 400, thereby preventing foreign matter such as dust and insects from entering the wiring insertion hole. The tip of the support bottom portion 2470 is chamfered to prevent cuts if the wiring comes into direct contact with it.

[0066] The support top surface portion 2480 is provided opposite the support bottom surface portion 2470 and is a plate-like member to which the underside of the power supply 500 is attached. The support side surface portion 2490 is a plate-like member that connects the support bottom surface portion 2470 and the support top surface portion 2480 and is provided vertically. The support side surface portion 2490 has multiple support side surface holes that are used to attach optional components such as sensors, cameras, or communication modules. Wiring that electrically connects the light-emitting substrate 240 and the power supply 500 is provided near the support side surface portion 2490 on the fin 270 side, and the support side surface portion 2490 covers the wiring. The support side surface portion 2490 prevents light failures caused by external forces such as wire contact and wire pulling, and prevents deterioration of the wiring coating due to direct sunlight.

[0067] The higher the height of the support side portion 2490, the greater the distance between the top-panel-side flat portion 400 and the power supply 500, making the power supply 500 less susceptible to the effects of hot air radiated from the top panel 390. However, if the distance between the top-panel-side flat portion 400 and the power supply 500 becomes excessively large, the gap between the arm horizontal portion 110 of the arm 100 and the power supply 500 becomes narrow, and to avoid interference, the length of the arm vertical portion 130 must be increased. For this reason, the height of the support side portion 2490 is adjusted appropriately based on the amount of heat generated. By setting the height of the support side portion 2490 to, for example, about 20 mm, the effects of heat on the power supply 500 are mitigated.

[0068] According to the second modification, heat from the light-emitting unit 230 is dissipated only by the top plate 390, without using the base 310. Therefore, in the case of low output, over-spec is not required and waste is not generated. Lighting fixtures 2000 are broadly divided into high-output and low-output classes. Since the high-output class generates more heat from the light-emitting unit 230 than the low-output class, improved heat dissipation performance is required. In the high-output class, the top plate 390 is where the power supply 500 is mounted. It overlaps with the base-side side surface portion 350 of the base 310 and is fixed with the connecting member 170, thereby functioning as a component that enhances the rigidity of the lighting fixture 2000. In the low-output class, the top plate 390 functions as a component to which the light-emitting unit 230 is attached. Thus, the low-output class has a simplified structure in which the light-emitting unit 230, cover 190, and arm 100 are directly attached to the top plate 390. That is, the top plate 390 is used as the base 310 and functions as the heat sink 260. This allows the sheet metal molds and processing for the lighting fixtures 2000 to be standardized for both the high-output class and the low-output class, thereby reducing manufacturing costs.

[0069] A certain distance is required between arm horizontal portion 110 and power source 500 to prevent interference when light source unit 180 is used at an angle. However, lighting fixture 2000 of the second modified example, which does not have fin 270, has support bracket 2460 directly below power source 500. Therefore, compared to lighting fixture 2000 of the first embodiment, which has fin 270, the distance between arm horizontal portion 110 and power source 500 is narrower by the height of support bracket 2460. Therefore, the height of top-plate-side central step portion 451 of top panel 390 is higher than the height of base-side central step portion 381 of base 310 by the height of support bracket 2460. Therefore, when base 310 is not used, the position to which arm 100 is fixed is separated by the height of top-plate-side central step portion 451 of top panel 390, so the distance between arm horizontal portion 110 and power source 500 can be made the same regardless of whether base 310 is present or not. Therefore, the arm 100 can be commonly used in both the high-power class and the low-power class. [Explanation of symbols]

[0070] 1 lighting fixture, 2 mounting portion, 100 arm, 110 arm horizontal portion, 120 mounting hole, 130 arm vertical portion, 131 arm marking, 140 arm flange portion, 150 arm connection portion, 160 crimping nut, 170 connection member, 180 light source unit, 190 cover, 200 lens, 210 peripheral fixing portion, 220 central fixing portion, 221 first protrusion, 222 second protrusion, 223 cover through hole, 224 fastening member, 225 cylindrical portion, 226 screw portion, 230 light emitting portion, 240 light emitting substrate, 241 substrate insertion hole, 250 light emitting element, 260 heat sink, 270 fin, 280 fin side flat portion, 290 fin side standing portion, 291 groove portion, 300 fin insertion hole, 310 base, 320 Base side flat portion, 321 base fixing hole, 330 protrusion portion, 340 wiring insertion hole, 350 base side surface portion, 351 base marking, 360 base side bent portion, 370 base side fastening portion, 371 base side fastening hole, 380 base side insertion hole, 380a base side step portion, 381 base side central step portion, 382 base side end step portion, 390 top plate, 400 top plate side flat portion, 410 heat dissipation hole, 420 top plate side portion, 421 top plate marking, 430 top plate side bent portion, 440 top plate side fastening hole, 450 top plate side insertion hole, 450a top plate side step portion, 451 top plate side central step portion, 452 top plate side end step portion, 460 support bracket, 470 Support bottom portion, 480 support top portion, 490 support side portion, 500 power supply, 510 power supply board, 520 case bottom, 530 case top, 540 power supply terminal block, 550 terminal block mounting bracket, 560 terminal block cover, 1000 lighting fixture, 1370 base side engaging portion, 1440 top plate side engaging portion, 2000 lighting fixture, 2460 support bracket, 2470 support bottom portion, 2480 support top portion, 2490 support side portion.

Claims

1. a base having a base fixing hole formed therein; a light-emitting unit attached to one surface of the base and having a board insertion hole formed at a position facing the base fixing hole; a cover that covers the light-emitting unit and is attached to one surface of the base, the cover having a central fixing portion with a cover through-hole formed at a position facing the board insertion hole; a fastening member having a cylindrical portion and a threaded portion having a diameter smaller than that of the cylindrical portion, the fastening member being inserted into the base fixing hole, the board insertion hole, and the cover through-hole to fasten the base, the light emitting portion, and the cover, The central fixing portion is a first protrusion that protrudes from a periphery of the cover through-hole, is inserted into the board insertion hole, and has a tip that faces the base; a second protrusion protruding from the outer side of the first protrusion and having a tip facing the light-emitting portion; The end surface of the cylindrical portion abuts against the base, thereby restricting the distance between the tip of the first protrusion and the base and the distance between the tip of the second protrusion and the light-emitting portion. Lighting fixtures.

2. an arm attached to the attachment portion; The light source unit according to claim 1 attached to the arm; A lighting fixture comprising:

Images