Lighting fixtures

Abstract

To provide a lighting fixture that is aesthetically pleasing and suppresses obstruction of light emitted from the light-emitting part. [Solution] The lighting fixture comprises an arm having a horizontal arm portion attached to a mounting part and extending in one direction, and vertical arm portions extending downward from both ends of the horizontal arm portion; a base having a pair of base-side side portions attached to each of the vertical arm portions of the arm, and a base-side planar portion connecting the pair of base-side side portions and on one side opposite to the horizontal arm portion to which a light-emitting part is attached; a power supply placed on the other side of the base opposite to the one side; and a wireless unit positioned in the area between the power supply and the base-side planar portion and connected to the power supply.

Description

Technical Field

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

Background Art

[0002] Conventionally, a lighting fixture including a light-emitting unit that irradiates light has been known. Patent Document 1 discloses a lighting fixture including a functional unit that functions as a wireless module. Patent Document 1 is a lighting fixture that performs dimming via a functional unit that is a wireless module, and is mainly provided in a high ceiling.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, depending on the mounting position of the lighting fixture, the size of the wireless unit, and the thickness of the cover covering the light-emitting unit, the wireless unit may protrude from the cover in the lighting fixture disclosed in Patent Document 1. As a result, the appearance of the lighting fixture deteriorates, and there is a risk that the wireless unit blocks the light irradiated from the light-emitting unit.

[0005] The present disclosure has been made to solve the above problems, and provides a lighting fixture that improves the appearance and suppresses blocking of the light irradiated from the light-emitting unit.

Means for Solving the Problems

[0006] The lighting fixture according to this disclosure comprises an arm having a horizontal arm portion attached to a mounting portion and extending in one direction, and vertical arm portions extending downward from both ends of the horizontal arm portion; a base having a pair of base-side side portions attached to each of the vertical arm portions of the arm, and a base-side planar portion connecting the pair of base-side side portions and on which a light-emitting portion is attached to one side opposite to the horizontal arm portion; a power supply placed on the other side of the base opposite to the one side; and a wireless unit arranged in the area between the power supply and the base-side planar portion and connected to the power supply. [Effects of the Invention]

[0007] According to this disclosure, the wireless unit is positioned in the area between the power supply and the base-side planar portion. Therefore, even if, for example, the light-emitting portion attached to the base-side planar portion is covered by a cover, the wireless unit does not cover the cover. Thus, it is possible to maintain a good appearance while suppressing the obstruction of light emitted from the light-emitting portion. [Brief explanation of the drawing]

[0008] [Figure 1] This is an assembled perspective view showing a lighting fixture according to Embodiment 1. [Figure 2] This is an exploded perspective view showing a lighting fixture according to Embodiment 1. [Figure 3] This is a front view showing a lighting fixture according to Embodiment 1. [Figure 4] This is an exploded perspective view showing the heat sink according to Embodiment 1. [Figure 5] This is a perspective view showing the base according to Embodiment 1. [Figure 6] This is a side view showing a light source unit according to Embodiment 1. [Figure 7] This is a perspective view showing the fins according to Embodiment 1. [Figure 8] This is a cross-sectional view showing the area around the wiring insertion hole according to Embodiment 1. [Figure 9] This is an assembled perspective view showing the wireless unit according to Embodiment 1. [Figure 10] It is an exploded perspective view showing a wireless unit according to Embodiment 1. [Figure 11] It is a cross-sectional view showing the periphery of a central fixing part according to Embodiment 1. [Figure 12] It is a perspective view showing a state where the arm of a lighting fixture according to Embodiment 1 is rotated. [Figure 13] It is a side view showing a state where a lighting fixture according to Embodiment 1 is attached to a ceiling. [Figure 14] It is a side view showing a state where a lighting fixture according to Embodiment 1 is attached to a wall. [Figure 15] It is a side view showing a state where a lighting fixture according to Embodiment 1 is attached to a wall at an inclination. [Figure 16] It is an assembled perspective view showing a lighting fixture according to Embodiment 2. [Figure 17] It is an exploded perspective view showing a lighting fixture according to Embodiment 2. [Figure 18] It is a front view showing a lighting fixture according to Embodiment 2. [Figure 19] It is a perspective view showing a heat sink according to Embodiment 2. [Figure 20] It is an assembled perspective view showing a wireless unit according to Embodiment 2. [Figure 21] It is an exploded perspective view showing a wireless unit according to Embodiment 2. [Figure 22] It is an assembled perspective view showing a lighting fixture according to a modification of Embodiment 2. [Figure 23] It is a front view showing a lighting fixture according to a modification of Embodiment 2. [Figure 24] It is a perspective view showing a heat sink according to a modification of Embodiment 2.

Embodiments for Carrying Out the Invention

[0009] Hereinafter, embodiments of the lighting fixture according to the present disclosure will be described with reference to the drawings. Note that the present disclosure is not limited by the embodiments described below. Also, in the following drawings including FIG. 1, the size relationships of the respective constituent members may be different from the actual ones. In the following description, terms indicating directions are appropriately used for ease of understanding, but this is for the purpose of explanation and these terms do not limit the present disclosure. Examples of terms indicating directions include "up", "down", "right", "left", "front", or "rear", etc. The width direction of the lighting fixture is referred to as the first direction, the depth direction of the lighting fixture is referred to as the second direction, and the height direction of the lighting fixture is referred to as the third direction. That is, the second direction intersects perpendicularly to the third direction and the first direction, the third direction intersects perpendicularly to the first direction and the second direction, and the first direction intersects perpendicularly 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 Embodiment 1. FIG. 2 is an exploded perspective view showing the lighting fixture 1 according to Embodiment 1. FIG. 3 is a front view showing the lighting fixture 1 according to Embodiment 1. As shown in FIGS. 1 to 3, the lighting fixture 1 is attached to an attachment portion 2 (see FIGS. 13 to 15) such as a ceiling or a wall, and includes an arm 100, a connection member 170, and a light source unit 180. The lighting fixture 1 is attached to a high ceiling such as a gymnasium or a warehouse. Note that the lighting fixture 1 may be attached to a wall, a pillar, a beam, or the like.

[0011] [Arm 100] The arm 100 is attached to the mounting part 2 and has an inverted U-shape. The light source unit 180 is rotatably and slidably mounted on the arm 100. The material of the arm 100 can be changed as appropriate depending on the usage environment, but is preferably iron or stainless steel. Stainless steel is particularly used in salt-resistant and corrosion-resistant environments. Alternatively, the material of the arm 100 may be a material with high thermal conductivity, such as an aluminum alloy. The arm 100 has a horizontal arm section 110, a vertical arm section 130, an arm flange section 140, and a crimping nut 160.

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

[0013] (Arm vertical section 130) The vertical arm sections 130 are a pair of plate-shaped members that extend downward from both ends of the horizontal arm section 110, i.e., toward the light source unit 180. At the lower ends of the two vertical arm sections 130, there are arm connection sections 150, which are holes used when the light source unit 180 is connected. The shape of the arm connection sections 150 may be round or polygonal. The length of the pair of vertical arm sections 130 is less than or equal to the length of the pair of top plate side sections 420 of the light source unit 180, and they are mounted on the inside of the top plate 390. One of the vertical arm sections 130 has an arm marking 131 that extends in the vertical direction.

[0014] (Arm flange portion 140) The arm flange portion 140 is the portion bent from both ends in the second direction of the arm horizontal portion 110 and the arm vertical portion 130 in the direction opposite to the mounting portion 2. Since the arm flange portion 140 is provided continuously from the arm horizontal portion 110 to the arm vertical portion 130, the rigidity of the arm 100 can be increased 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 due to rotational movement. If the arm vertical portion 130 is provided on the outside of the base 310 of the light source unit 180, it will interfere due to rotational movement, so the arm flange portion 140 cannot be provided in the interfering part. In this embodiment 1, since the arm vertical portion 130 is provided on the inside of the top plate 390, there are no interfering peripheral members nearby. Therefore, since the arm flange portion 140 is provided up to the vicinity of the arm connection portion 150, the rigidity of the arm 100 is improved.

[0015] (crimping nut 160) The crimping nut 160 is inserted into the arm connection portion 150 and fixed to the vertical portion 130 of the arm by deforming when external force is applied with a special tool. The crimping nut 160 has an internal thread, which allows it to directly fix the connecting member 170, which has an external thread.

[0016] [Connecting member 170 and washer 171] The connecting member 170 is an arm bolt that 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 screwed onto the crimping nut 160 of the arm 100 to attach 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 suspension bolt. The washer 171 increases the contact area with respect to the base side surface 350 and improves the efficiency of the axial force of the connecting member 170. The base side insertion hole 380 of the base side surface 350 is an elongated hole, and the contact area is reduced compared to a round hole, so the outer diameter of the washer 171 is preferably relatively long, for example, φ30.

[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 illuminates the target object with light. The light source unit 180 is attached to the arm 100 by inserting the connecting member 170 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 screwing it onto the crimping nut 160 of the arm 100. The light source unit 180 includes a heat sink 260, a top plate 390, a support bracket 460, a power supply 500, a light-emitting part 230, a cover 190, and a fastening member 224. As shown in Figure 3, the space between the arm 100 and the light source unit 180 is a workspace 10 during installation.

[0018] (Heat sink 260) Figure 4 is an exploded perspective view showing the heat sink 260 according to Embodiment 1. The heat sink 260 is a heat dissipation member on which the light-emitting part 230 is attached and which dissipates the heat generated from the light-emitting part 230. The heat sink 260 is made of aluminum sheet metal, which has good heat dissipation properties. The surface of the heat sink 260 is anodized to ensure corrosion resistance and heat dissipation. Note that for low-power class lighting fixtures 1, the temperature rise due to the light emission of the light-emitting element 250 is limited, so the heat sink 260 may not be used. As shown in Figure 4, the heat sink 260 has a base 310 and fins 270.

[0019] (Base 310) Figure 5 is a perspective view showing the base 310 according to Embodiment 1. As shown in Figure 5, the base 310 has a U-shaped cross-section and dissipates heat from the light-emitting section 230. Since the light-emitting substrate 240 of the light-emitting section 230, which is a heat source, is placed on the base 310, it is preferable that the base 310 be made of aluminum, which has good heat dissipation properties. The thinner the base 310, the more the mass of the lighting fixture 1 can be reduced, but a certain thickness is necessary considering rigidity, heat dissipation effect, and fixing force of fastening parts. The thickness of the base 310 also depends on the size and mass of the light source unit 180, but it is preferable that it is between 1.2 mm for low-power classes and 3.0 mm for high-power classes. The base 310 has a base-side flat portion 320 and a base-side side portion 350.

[0020] (Base side flat portion 320) The base-side flat portion 320 is a rectangular sheet metal, and the light-emitting substrate 240 and cover 190 of the light-emitting portion 230 are mounted facing each other on its lower surface. The base-side flat portion 320 connects the lower ends of two base-side side portions 350 that are erected from both ends of the base-side flat portion 320 in the first direction. The base-side flat portion 320 has threaded base fixing holes 321 formed therein. The upper surface of the base-side flat portion 320 is provided with an upwardly projecting projection 330. The projection 330 is used to attach the fin 270 to the upper surface of the base-side flat portion 320 and is positioned opposite the fin insertion hole 300 (see Figure 7) of the fin 270. When an external force is applied after the projection 330 is inserted into the fin insertion hole 300 of the fin 270, the tip of the projection 330 deforms. The deformed portion grips the fin-side flat portion 280 (see Figure 7) of the fin 270, thereby fixing the fin 270 to the base-side flat portion 320. To ensure reliable positioning and fixing strength of the fin 270, it is preferable that two or more projections 330 are provided on each fin-side flat portion 280 of the fin 270, at positions facing the fin 270.

[0021] A wiring insertion hole 340 is formed in the base-side flat portion 320 into which wiring (not shown) connecting the power supply 500 and the light-emitting substrate 240 is inserted. The light-emitting substrate 240 side of the wiring insertion hole 340 is chamfered to prevent cuts if the wiring comes into direct contact with it. The diameter of the wiring insertion hole 340 is set to be larger than the diameter of the wiring so as not to hinder the operation of the wiring when it is connected to the connector provided on the light-emitting substrate 240 after it has been inserted into the wiring insertion hole 340. If the diameter of the wiring insertion hole 340 is too large, dust and insects will easily enter the cover 190, so a part of the wiring insertion hole 340 is covered by the cover 190 and support bracket 460 which are fixed after connection, and the opening in the product state is kept as small as possible.

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

[0023] (Base side portion 350) The base-side portion 350 is a pair of plate-shaped members erected from both ends of the base-side flat portion 320. The base-side flat portion 320 and the base-side portion 350 are formed by bending a single sheet of metal. Since the base-side portion 350 is constructed continuously with the base-side flat portion 320, there is no need to construct the base-side portion 350 as a separate part, which reduces investment costs and assembly processes. Also, because the base-side portion 350 is not a separate part, it is possible to suppress loosening of fastening parts due to external forces such as vibrations concentrating on them. The height of the base-side portion 350 is highest where the arm 100 is attached, and then slopes downward from the highest point, becoming lower in other parts. The mass of the lighting fixture 1 can be reduced by cutting the sheet metal in the areas of the base-side portion 350 where external forces from the arm 100 do not directly load it.

[0024] Furthermore, the upper end of the base-side portion 350 slopes downwards gradually, which helps to relieve stress compared to the base when it is cut vertically. The slope angle of the upper end of the base-side portion 350 is preferably 45°. A base marking 351 is provided on the upper center of the base-side portion 350 so that the angle of the arm 100 when it is attached to the mounting portion 2 can be visually confirmed. By aligning the base marking 351 and the arm marking 131, the angle of the arm 100 can be appropriately adjusted.

[0025] A base-side fastening portion 370 is provided on the base-side side portion 350. The base-side fastening portion 370 is formed by cutting and raising a portion of the base-side side portion 350 at a position higher than the height of the fins 270 so that the fins 270 and the top plate 390 do not interfere with each other, from the base-side flat portion 320 toward the direction in which the fins 270 are erected. The base-side fastening portion 370 is parallel to the base-side flat portion 320. A base-side fastening hole 371 is formed in the base-side fastening portion 370, which is used when fixing the top plate 390. Because the base-side fastening portion 370 is provided parallel to the base-side flat portion 320, the fixing direction of all fastening components faces toward the light-emitting portion 230. As a result, when placing and fixing the top plate 390, there is no need to change the direction of the tool, thus improving ease of assembly.

[0026] (Base side insertion hole 380) Figure 6 is a side view showing the light source unit 180 according to Embodiment 1. As shown in Figure 6, the base-side insertion hole 380 is an opening attached to the vertical arm portion 130 of the arm 100 and extending in a second direction. The pair of base-side insertion holes 380 are formed symmetrically at a position higher than the top plate side planar portion 400 when the top plate 390 is positioned. An arc-shaped recess, the base-side stepped portion 380a, is formed above the base-side insertion hole 380. The weight of the top plate 390 causes the connecting member 170 to fit into the base-side stepped portion 380a, thereby preventing the connecting member 170 from moving unintentionally. Thus, the base-side stepped portion 380a is formed for angle adjustment of the light source unit 180 and fixing of the connecting member 170. The base-side insertion hole 380 is formed to overlap the top plate-side insertion hole 450 of the top plate 390.

[0027] The base-side stepped portion 380a consists of a base-side central stepped portion 381 located in the center of the base-side side portion 350 and a base-side end-side stepped portion 382 located at the end of the base-side insertion hole 380. The base-side central stepped portion 381 is the part that becomes the rotation axis of the light source unit 180 when the mounting portion 2 is a ceiling, and the base-side end-side stepped portion 382 is the part that becomes the rotation axis of the light source unit 180 when the mounting portion 2 is a wall.

[0028] Thus, the base 310 has a base-side side portion 350 and a base-side flat portion 320. The base-side side portions 350 are a pair of members attached to each of the vertical arm portions 130 of the arm 100, and each has a base-side insertion hole 380 formed therein that extends in a direction perpendicular to one direction. The base-side flat portion 320 connects the pair of base-side side portions 350, and the light-emitting portion 230 is attached to one side opposite to the horizontal arm portion 110.

[0029] (Finn 270) Figure 7 is a perspective view showing the fin 270 according to Embodiment 1. As shown in Figure 7, the fin 270 has a U-shaped cross-section and is a member made by bending sheet metal. The fin 270 is made of aluminum, which has good heat dissipation properties. The thickness of the fin 270 does not depend much on the heat dissipation properties, but it is necessary to set an appropriate thickness considering the viewpoint of mass and external forces such as contact or wind pressure. From the viewpoint of heat dissipation and rigidity, the thickness of the fin 270 is preferably 0.5 mm. The fin 270 is provided on the side of the base-side flat portion 320 opposite to the side to 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 fin 270 is arranged parallel to the base-side side portion 350 and spaced apart from each other. The fin 270 has a fin-side flat portion 280 and a fin-side upright portion 290.

[0030] (Fin-side flat portion 280) The fin-side flat portion 280 is a plate-shaped member extending in a second direction that is attached in contact with the base-side flat portion 320. The base-side flat portion 320 has a fin insertion hole 300 into which a projection 330 provided on the base-side flat portion 320 is inserted. After the projection 330 is inserted into the fin insertion hole 300 of the fin 270, an external force is applied and it is crimped, causing the tip of the projection 330 to deform and clamp onto the fin-side flat portion 280, thereby fixing it in place.

[0031] (Fin-side erection section 290) The fin-side upright sections 290 are a pair of plate-shaped members erected from both ends of the fin-side flat section 280 in the first direction. Heat generated from the light-emitting section 230 is transferred to the base-side flat section 320, and then reaches the fin-side upright sections 290 via the fin-side flat section 280, where it is efficiently dissipated. The higher the height of the fin-side upright sections 290, the greater the heat dissipation area and thus the better the heat dissipation performance. However, the height is set to an optimal level appropriate for the heat generated by the luminous flux class. This reduces the volume and mass of the lighting fixture 1. The higher the luminous flux class, the higher the height of the fin-side upright sections 290, and the lower the output class, the lower the height of the fin-side upright sections 290. Note that if the output class is very low, the fins 270 themselves are unnecessary. The fin-side upright sections 290 are arranged at optimal equal intervals so as not to obstruct each other's heat dissipation. A groove 291 is formed in the center of the fin-side upright portion 290, and is recessed lower than the height of the fin-side upright portion 290. The formation of the groove 291 secures space in the width direction of the central part, promoting air circulation. This improves the heat dissipation performance of the fin 270.

[0032] (Tabletop 390) As shown in Figure 4, the top plate 390 has a U-shaped cross-section with an opening formed on the upper side, which dissipates heat from the light-emitting section 230. The top plate 390 is on which the power supply 500 is placed and is spaced apart from the fins 270 provided on the base 310. This prevents the heat dissipated from the fins 270 from being directly transferred to the top plate 390. The top plate 390 is preferably made of aluminum, which has good heat dissipation properties. The top plate 390 has a top plate side flat portion 400 and a top plate side lateral portion 420.

[0033] (Flat surface on top panel side 400) The top-side flat section 400 is a rectangular sheet metal, on which the power supply 500 is mounted. The underside of the top-side flat section 400 is spaced apart from the fins 270. In the lighting fixture 2000 (see Figure 16) in which the fins 270 are omitted, a support bracket 460 is provided on the top surface to prevent heat from the base-side flat section 320, on which the power supply 500 is mounted, and the light-emitting substrate 240 and cover 190 are provided on the underside. The top-side flat section 400 corresponds to the shade of the heat sink 260, and prevents dust from accumulating on the fins 270, which can reduce the heat dissipation performance of the fins 270.

[0034] At both ends of the top plate-side flat portion 400 in the first direction, there are elongated heat dissipation holes 410 that extend along the second direction, which is the longitudinal direction of the power supply 500. Note that in lighting fixtures 2000 (see Figure 16) that omit the fins 270, the heat dissipation holes 410 are not formed. The heat dissipation holes 410 facilitate the passage of the hot air dissipated by the fins 270 and its dissipation to the outside of the light source unit 180. The heat dissipation holes 410 are not limited to a rectangular shape; they may also be circular, and multiple holes may be formed along the first and second directions. The top plate-side flat portion 400 has top plate-side fastening holes 440 that are opposite to the base-side fastening holes 371 of the base-side fastening portion 370. The top plate 390 and the base 310 are fixed by inserting screws into the top plate-side fastening holes 440 and the base-side fastening holes 371.

[0035] In the portion of the top plate side flat portion 400 that is not connected to the top plate side lateral portion 420, a top plate side bent portion 430 extending downward is provided. That is, the top plate side bent portion 430 is provided at both ends of the top plate side flat portion 400 that are perpendicular to the ends where the top plate side lateral portions 420 are provided. The top plate side bent portion 430 improves rigidity while preventing the fins 270 from being exposed, thereby suppressing contact between other parts and the fins 270.

[0036] The top panel side bent portion 430 is provided with a top panel side bent extension portion 432 that extends further downward from a part of the top panel side bent portion 430. The top panel side bent extension portion 432 has, for example, two bent mounting holes 431 formed therein. The bent mounting holes 431 are used to attach the outer casing 620 of the wireless unit 600 to the top panel 390 using wireless unit screws 640.

[0037] (Top panel side section 420) The top plate side sections 420 are a pair of plate-shaped members erected from both ends of the top plate side flat section 400. The top plate side flat section 400 and the top plate side sections 420 are formed by bending a single sheet of metal. The height of the top plate side sections 420 is highest where the arm 100 is attached, and then slopes downward from the highest point, becoming lower in other parts. The mass of the lighting fixture 1 can be reduced by cutting the sheet metal in the areas of the top plate side sections 420 where external forces from the arm 100 do not directly load. In addition, the gradual sloping of the upper end of the top plate side sections 420 reduces stress compared to the base when it is cut vertically. The sloping angle of the upper end of the top plate side sections 420 is preferably 45°.

[0038] The external dimension, which is the width between the top plate side sections 420, is smaller than the internal dimension, which is the width between the base side sections 350 (external dimension < internal dimension). In other words, the top plate side sections 420 are positioned inside the base side sections 350. A top plate marking 421 is made on the sloped surface of one side of the top plate side section 420 so that the angle of the arm 100 when attached to the mounting section 2 can be visually confirmed when the mounting section 2 is a wall, column, beam, etc. When the top plate 390 and the base 310 are stacked, only the sloped surface with the top plate marking 421 is exposed. This allows the same top plate marking 421 to be used in lighting fixture 1 which has fins 270 and lighting fixture 2000 which omits fins 270 (see Figure 18).

[0039] (Through hole on top panel side 450) The top plate side insertion hole 450 is an opening attached to the vertical arm portion 130 of the arm 100 and extending in a second direction. The pair of top plate side insertion holes 450 are formed symmetrically at a position higher than the top plate side planar portion 400. As shown in Figure 6, a top plate side step portion 450a, which is an arc-shaped recess, is formed above the top plate side insertion hole 450. The weight of the top plate 390 causes the connecting member 170 to fit into the top plate side step portion 450a, thereby preventing the connecting member 170 from moving unintentionally. Thus, the top plate side step portion 450a is formed for angle adjustment of the light source unit 180 and fixing of the connecting member 170. The top plate side insertion hole 450 is formed to overlap the base side insertion hole 380 of the base 310. The top plate side step portion 450a consists of a top plate side central step portion 451 located in the center of the top plate side surface portion 420 and a top plate side end step portion 452 located at the end of the top plate side insertion hole 450.

[0040] The central stepped portion 451 on the top plate side is the rotation axis of the light source unit 180 when the mounting part 2 is a ceiling, and the end stepped portion 452 on the top plate side is the rotation axis of the light source unit 180 when the mounting part 2 is a wall, column, beam, etc. The central stepped portion 451 on the top plate side extends upward from the central stepped portion 381 on the base side. That is, the through hole 450 on the top plate side extends in the same direction as the through hole 380 on the base side and is longer than the through hole 380 on the base side in the height direction.

[0041] Thus, the top plate 390 has a pair of top plate side surfaces 420 that are attached to the vertical arm portions 130 of the arm 100 and have top plate side insertion holes 450 formed in a direction perpendicular to one direction, and a top plate side flat portion 400 that connects the pair of top plate side surfaces 420.

[0042] (Connection between the top plate 390 and base 310 and the arm 100) As shown in Figure 1, the base 310 and the top plate 390 are attached to the vertical arm portion 130 of the arm 100 with the base-side insertion hole 380 and the top plate-side insertion hole 450 overlapping. The vertical arm portion 130 is rotatably attached to the base-side side portion 350 of the base 310. The vertical arm portion 130 rotates relative to the base-side side portion 350 while moving from the central base-side central step portion 381 to the base-side end-side step portion 382 at the base-side insertion hole 380 shown in Figure 6. At the same time, the vertical arm portion 130 rotates relative to the top plate-side side portion 420 while moving from the central top plate-side central step portion 451 to the top plate-side end-side step portion 452 at the top plate-side insertion hole 450 shown in Figure 6.

[0043] (Support bracket 460) As shown in Figure 2, the support bracket 460 is a box-shaped member with a rectangular parallelepiped shape, and is a fitting that fixes the base-side flat portion 320 and the top plate-side flat 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 portion 470, a support top portion 480, and a support side portion 490. The support bottom portion 470 is a plate-shaped member that is attached to the base-side flat portion 320. The tip of the support bottom portion 470 covers a part of the wiring insertion hole 340 formed in the base-side flat portion 320, thereby preventing foreign matter such as dust and insects from entering the wiring insertion hole 340. The tip of the support bottom portion 470 is chamfered to prevent cuts if the wiring comes into direct contact with it.

[0044] The upper support portion 480 is positioned opposite the lower support portion 470 and is a plate-shaped member to which the lower surface of the top plate side flat portion 400 is attached. The side support portion 490 is a plate-shaped member that connects the lower support portion 470 and the upper support portion 480 and is erected vertically. Multiple side support holes are formed in the side support portion 490, which are used when attaching 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 side support portion 490 on the fin 270 side, and the side support portion 490 covers the wiring. The side support portion 490 suppresses non-illumination caused by external forces such as contact and pulling of the wiring and suppresses deterioration of the wiring insulation due to direct sunlight. Furthermore, the support bracket 460 primarily serves to cover and conceal the wiring, and is not limited to a configuration in which the support upper surface 480 is attached to the underside of the top plate side flat surface 400; the support upper surface 480 and the top plate side flat surface 400 may be spaced apart.

[0045] Figure 8 is a cross-sectional view showing the area around the wiring insertion hole 340 according to Embodiment 1. As shown in Figure 8, the end of the support bottom portion 470 of the support bracket 460 on the fin 270 side covers a part of the wiring insertion hole 340 of the base-side flat portion 320. That is, the distance B between the end of the support bottom portion 470 and the edge of the wiring insertion hole 340 is smaller than the diameter A of the wiring insertion hole 340. As a result, when a wire is inserted into the wiring insertion hole 340, it is difficult for it to come out due to the support bottom portion 470.

[0046] (power supply 500) As shown in Figure 2, the power supply 500 is a DC power supply device that converts the AC voltage supplied from an external commercial power source into a DC voltage to cause the light-emitting section 230 to emit light. The power supply 500 is mounted on the top surface of the top plate 390 located on the upper 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, a terminal block cover 560, and a wireless unit connector 570. The power supply board 510 converts the AC voltage into a DC voltage and supplies it to the light-emitting board 240. The power supply board 510 is mounted on the top surface of the case bottom 520. The case bottom 520 constitutes 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 mounted on the top surface of the top plate side flat section 400 in the lighting fixture 1 which has fins 270. The bottom surface of the case bottom 520 is positioned between the upper surfaces of multiple support brackets 2460 in a lighting fixture 2000 (see Figure 16) that does not have fins 270.

[0047] The case top 530 is a component that covers 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 the fixing holes in the top plate 390 in the lighting fixture 1 which has fins 270. The case top 530 is attached to the fixing holes on the upper surface of the support bracket 2460 in the lighting fixture 2000 which does not have fins 270 (see Figure 16). The width of the case top 530 in the first direction, which is the shorter side, 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 terminal block 540 is electrically connected to the power supply board 510 by wiring. The power terminal block 540 receives AC voltage input when wiring from an external commercial power supply is connected to it. The power terminal block 540 is located at the longitudinal end of the power supply 500, making it easy to work with power tools.

[0048] The terminal block mounting bracket 550 is attached to the power supply board 510 and is a component 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 the 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 component that covers the terminal block cover 560. By loosening the screws on the terminal block cover 560, it can be rotated to expose the part of the power supply terminal block 540 to which the wiring is connected. After the wiring is connected to the power supply terminal block 540, tightening the screws on the terminal block cover 560 can prevent dust from accumulating in the part where the wiring is connected. The wireless unit connector 570 is a connector for connecting the harness 650 of the wireless unit 600.

[0049] (Light-emitting part 230) As shown in Figure 2, the light-emitting unit 230 is electrically connected to the power supply 500 by wiring and emits light onto the object to be illuminated. The light-emitting unit 230 has a light-emitting substrate 240 and a light-emitting element 250.

[0050] (Light-emitting substrate 240) The light-emitting substrate 240 is a rectangular plate-shaped member. The light-emitting substrate 240 may also be circular or polygonal in shape. Multiple 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 portion 320 of the base 310. A substrate insertion hole 241 is formed in the center of the light-emitting substrate 240, which is necessary for positioning it opposite the central fixing portion 220 of the cover 190.

[0051] (Light-emitting element 250) Multiple light-emitting elements 250 are mounted on the underside of the light-emitting substrate 240. The light-emitting elements 250 are mounted while avoiding the substrate insertion holes 241 of the light-emitting substrate 240. The light-emitting elements 250 are surface-mount type pseudo-white LED elements packaged by arranging a phosphor that converts blue light to yellow light on an LED chip that emits blue light with a wavelength of 440-480 nm. The light-emitting elements 250 may be solid-state lasers, semiconductor lasers, organic electroluminescent (EL) or inorganic EL, etc.

[0052] (Cover 190) As shown in Figure 2, the cover 190 covers the entire light-emitting substrate 240 and has a rectangular shape. Depending on the environment of use, the material used for the cover 190 may be polycarbonate or acrylic resin. In order to reduce the overall height of the lighting fixture 1, the height of the cover 190 is kept as low as possible. The cover 190 has peripheral fixing parts 210 and central fixing parts 220. The peripheral fixing parts 210 are provided at four corners of the cover 190 and at four central points between each corner, and are fixed with multiple screws so as to minimize the gap between the cover 190 and the base 310.

[0053] (Wireless unit 600) Figure 9 is an assembled perspective view showing the wireless unit 600 according to Embodiment 1, and Figure 10 is an exploded perspective view showing the wireless unit 600 according to Embodiment 1. The wireless unit 600 is connected to the wireless unit connector 570 of the power supply 500 and is used fixed to the light source unit 180. The wireless unit 600 can be retrofitted to the light source unit 180, and by setting the specifications of the wireless unit 600, it is possible to provide the function of sending various instructions to the light source unit 180. As shown in Figures 9 and 10, the wireless unit 600 has an outer casing 620, a circuit board 630, wireless unit screws 640, and a harness 650.

[0054] The outer casing 620 is a box-shaped component divided into upper and lower halves that covers the substrate 630, and is made of molded resin. This provides insulation to the outer casing 620, preventing interference with the reception performance of the antenna 632 mounted on the substrate 630. The upper and lower halves are fixed together by snap-fit ​​without the use of fixing parts. The outer casing 620 has two outer casing mounting holes 623. The outer casing mounting holes 623, along with the bent mounting holes 431 of the bent extension portion 432 on the top plate 390, are used to attach the wireless unit 600 to the top plate 390. Although the example shows two outer casing mounting holes 623 formed at the longitudinal end, they may also be formed at the short end. Furthermore, forming two or more outer casing mounting holes 623 can improve the fixing force of the wireless unit 600.

[0055] The circuit board 630 is a component housed within the outer casing 620 and is equipped with a connector 631 that connects the wireless unit 600 to the power supply board 510, and an antenna 632 that receives external radio waves. The harness 650 is connected to the wireless unit connector 570 mounted on the power supply 500. This electrically connects the wireless unit 600 and the power supply 500.

[0056] Next, the mounting position of the wireless unit 600 will be described. As shown in Figure 3, the wireless unit 600 is positioned in the area between the power supply 500 and the base-side flat surface 320. Therefore, the wireless unit 600 does not protrude from the cover 190. Thus, the appearance of the lighting fixture 1 is good. Furthermore, the wireless unit 600 is fixed using the bent mounting hole 431 formed in the bent extension portion 432 of the bent portion 430 on the top plate 390, which is necessary for mounting the power supply 500. Thus, even in lighting fixtures 1 that do not require support brackets, the wireless unit 600 can be attached without increasing the number of components. Moreover, since the wireless unit 600 is fixed outside the work space 10, interference with power tools and the like can be suppressed. Furthermore, since the wireless unit 600 is attached to the light-emitting portion 230 side of the base 310, the amount of protrusion of the wireless unit 600 after installation can be suppressed. Thus, the appearance of the lighting fixture 1 is good. In the first embodiment, the wireless unit 600 is directly fixed to the top plate bend portion 430 of the top plate 390. However, it is not limited to this, and may also be fixed to the top plate bend portion 430 of the top plate 390 via a wireless mounting bracket 610, which will be described later.

[0057] According to this embodiment 1, the wireless unit 600 is positioned in the area between the power supply 500 and the base-side flat surface 320. Therefore, even if, for example, the light-emitting unit 230 attached to the base-side flat surface 320 is covered by the cover 190, the wireless unit 600 does not cover the cover 190. Thus, it is possible to maintain a good appearance while suppressing the blocking of light emitted from the light-emitting unit 230.

[0058] (Central fixed part 220) Figure 11 is a cross-sectional view showing the periphery of the central fixing portion 220 according to Embodiment 1. As shown in Figure 11, the central fixing portion 220 is provided in the center of the cover 190 and is the 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 its tip facing the base 310. The second protrusion 222 is a cylindrical portion that protrudes outside the first protrusion 221 and has its tip facing the light-emitting portion 230.

[0059] The outer diameter of the first protrusion 221 is smaller than the inner diameter of the substrate insertion hole 241 of the light-emitting substrate 240. This allows the first protrusion 221 to be inserted into the substrate insertion hole 241. By minimizing the gap between the diameters, the light-emitting substrate 240 is guided when the first protrusion 221 is inserted. The second protrusion 222 is provided so as to be almost flush with the light-emitting substrate 240, minimizing the gap between the light-emitting substrate 240 and the base 310 and suppressing a decrease in heat dissipation. Furthermore, the small gap formed between the tip of the second protrusion 222 and the light-emitting substrate 240 reduces the load on the cover 190. Similarly, the small gap formed between the tip of the first protrusion 221 and the base 310 reduces the load on the cover 190.

[0060] (Fastening member 224) As shown in Figure 11, the fastening member 224 is a member provided in the central fixing part 220 and has a cylindrical part 225 and a threaded part 226 with a smaller diameter than the cylindrical part 225. The fastening member 224 is, for example, a stepped screw. The cover 190, the light-emitting substrate 240, and the base 310 are fixed by inserting the fastening member 224 into the cover through hole 223, the substrate insertion hole 241, and the base fixing hole 321. In the central fixing part 220, the axial end face of the cylindrical part 225 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 part 230. Therefore, no direct stress is applied to the cover 190. Thus, it is possible to position the light-emitting substrate 240 while suppressing damage to the cover 190 due to oil crazing, and it is possible to suppress floating of the light-emitting substrate 240 with the base 310.

[0061] According to this embodiment 1, the base 310, the light-emitting part 230, and the cover 190 are fastened together by the fastening member 224, thus maintaining close contact between the light-emitting part 230 and the base 310. Furthermore, the axial end face of the cylindrical part 225 abuts against the base 310, thereby restricting the distance between the tip of the first projection 221 and the base 310, and the distance between the tip of the second projection 222 and the light-emitting part 230. As a result, the fastening member 224 does not press against the cover 190. Therefore, close contact between the light-emitting part 230 and the base 310 can be maintained without directly loading the cover 190.

[0062] Figure 12 is a perspective view showing the arm 100 of the lighting fixture 1 according to Embodiment 1 in a rotated state. As described above, as shown in Figure 12, the width B of the power supply 500 in one direction (first direction) is contained within the width A between the mounting holes 120. The vertical arm portion 130 rotates relative to the base side portion 350 while moving from the central base-side central step portion 381 to the base-side end-side step portion 382 at the base-side insertion hole 380 shown in Figure 6. At the same time, the vertical arm portion 130 rotates relative to the top plate side portion 420 while moving from the central top plate-side central step portion 451 to the top plate-side end-side step portion 452 at the top plate-side insertion hole 450 shown in Figure 6. As a result, as shown in Figure 12, the direction in which the vertical arm portion 130 extends and the direction in which the power supply 500 extends are parallel. Furthermore, a workspace exists with a width C between the first ends of the power supply 500 and the side surface 420 of the top plate 390.

[0063] According to this embodiment 1, the width of the power supply 500 in one direction is contained between the mounting holes 120 of the horizontal arm portion 110 of the arm 100. Therefore, there is space on the side of the arm 100 opposite to the mounting portion 2. Consequently, long tools such as power tools can be used, and they can be fixed to the mounting portion 2 without changing the mounting tool.

[0064] Figure 13 is a side view showing the lighting fixture 1 according to Embodiment 1 mounted on the ceiling. Figure 14 is a side view showing the lighting fixture 1 according to Embodiment 1 mounted on a wall. Figure 15 is a side view showing the lighting fixture 1 according to Embodiment 1 mounted at an angle to the wall. As shown in Figure 13, when the mounting part 2 is a ceiling, the vertical arm 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 Figures 14 and 15, when the mounting part 2 is a wall, the vertical arm 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. Note that the mounting part 2 is not limited to a wall, but can be anything that extends vertically, such as a column or beam.

[0065] According to this embodiment 1, the vertical portion of the arm 100 rotates relative to the base-side side portion 350 while moving from the center to the end within the base-side insertion hole 380. As a result, the direction in which the vertical portion 130 of the arm extends and the direction in which the power supply 500 extends become parallel. Therefore, the packaging size can be reduced. In addition, because the rotation angle of the arm 100 is highly flexible, it can be mounted on a wall. That is, it is possible to reduce the packaging size and mount it on a wall while keeping labor and costs down.

[0066] Embodiment 2. Figure 16 is an assembled perspective view showing the lighting fixture 2000 according to Embodiment 2. Figure 17 is an exploded perspective view showing the lighting fixture 2000 according to Embodiment 2. Figure 18 is a front view showing the lighting fixture 2000 according to Embodiment 2. As shown in Figures 16 to 18, Embodiment 2 differs from Embodiment 1 in that the fins 270 are not provided.

[0067] The lighting fixture 2000 comprises a top plate 390, a light-emitting unit 230, a cover 190, a support bracket 2460 on which the power supply 500 is located, and the power supply 500. The light source unit 180 is attached to the arm 100 by inserting a connecting member 170 through a top plate side insertion hole 450 formed in the top plate 390 and fixing it with a crimping nut 160. That is, in Embodiment 1, the light-emitting unit 230, which is attached to the base side flat portion 320 of the base 310, is attached to the top plate side flat portion 400 of the top plate 390. In this way, the light-emitting unit 230 can be detachably attached to the top plate 390 and the base 310. Furthermore, the shape of the support bracket 2460 in Embodiment 2 differs from that of Embodiment 1.

[0068] The support bracket 2460 is a bracket that fixes the top plate side flat surface 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 sheet of metal. The support bracket 2460 has a support bottom surface 2470, a support top surface 2480, and a support side surface 2490. The support bottom surface 2470 is a plate-shaped member that is attached to the top plate side flat surface 400. The tip of the support bottom surface 2470 covers a part of the wiring insertion hole formed in the top plate side flat surface 400, thereby preventing foreign matter such as dust and insects from entering the wiring insertion hole. The tip of the support bottom surface 2470 is chamfered to prevent cuts if the wiring comes into direct contact with it.

[0069] The upper support portion 2480 is positioned opposite the lower support portion 2470 and is a plate-shaped member to which the lower surface of the power supply 500 is attached. The side support portion 2490 is a plate-shaped member that connects the lower support portion 2470 and the upper support portion 2480 and is erected vertically. Multiple side support holes are formed in the side support portion 2490, which are used when attaching 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 side support portion 2490 on the fin 270 side, and the side support portion 2490 covers the wiring. The side support portion 2490 suppresses non-illumination caused by external forces such as contact and pulling of the wiring and suppresses deterioration of the wiring insulation due to direct sunlight.

[0070] The higher the height of the support side portion 2490, the greater the distance between the top plate side flat portion 400 and the power supply 500, making the power supply 500 less susceptible to the effects of heat radiated from the top plate 390. However, if the distance between the top plate side flat portion 400 and the power supply 500 becomes excessively large, the gap between the horizontal portion 110 of the arm 100 and the power supply 500 becomes narrower, and in order to avoid interference, the length of the vertical portion 130 of the arm needs to 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 thermal effects on the power supply 500 are mitigated.

[0071] Figure 19 is a perspective view showing the heat sink 260 according to Embodiment 2. As shown in Figure 19, in Embodiment 2, the heat sink 260 consists only of the top plate 390, and the top plate 390 performs the function of the base 310 in Embodiment 1. The top plate side flat portion 400 is provided with a power supply 500 on a support bracket 2460 so that it does not directly receive heat from the top plate side flat portion 400 on its upper surface. The light-emitting portion 230 and the cover 190 are attached to the side of the top plate side flat portion 400 opposite to the power supply 500. Two top plate side mounting holes 424 are formed in the top plate side portion 420. The top plate side mounting holes 424 are used to attach the wireless unit 600 to the top plate 390.

[0072] Figure 20 is an assembled perspective view showing the wireless unit 600 according to Embodiment 2, and Figure 21 is an exploded perspective view showing the wireless unit 600 according to Embodiment 2. As shown in Figures 20 and 21, a wireless mounting bracket 610 is attached to the wireless unit 600 according to Embodiment 2. The wireless mounting bracket 610 is an L-shaped member used to attach the wireless unit 600 to the top plate 390, and the wireless unit 600 is fixed to it. The wireless mounting bracket 610 has a horizontal part 600a on which the wireless unit 600 is placed, and a vertical part 600b that extends vertically from one end of the horizontal part 600a.

[0073] The horizontal portion 600a of the wireless mounting bracket 610 has an antenna opening formed at a position corresponding to the antenna 632, thereby preventing the radio waves reaching the antenna 632 from being blocked by the metal wireless mounting bracket 610.

[0074] The vertical portion 600b of the wireless mounting bracket 610 has two vertical wireless mounting holes 612, which are used to attach the wireless unit 600 to the top plate side portion 420 of the top plate 390, along with the top plate side mounting hole 424. If the wireless unit 600 is attached to the top plate side portion 420 without using the wireless mounting bracket 610, the distance to the wireless unit connector 570 will be long, and the length of the harness 650 may become unnecessarily long. In this embodiment 2, since the wireless unit 600 is attached to the top plate side portion 420 using the wireless mounting bracket 610, the distance to the wireless unit connector 570 is short. Therefore, the length of the harness 650 can be shortened.

[0075] The horizontal portion 600a of the wireless mounting bracket 610 has two wireless horizontal mounting holes 611, which are used to attach the wireless unit 600 to the wireless mounting bracket 610, along with the outer mounting hole 623.

[0076] Next, the mounting position of the wireless unit 600 will be described. As shown in Figure 18, the wireless unit 600 is fixed to the top plate 390 (which performs the function of the base 310), which is necessary for mounting the light-emitting substrate 240 of the light-emitting section 230. For this reason, even in lighting fixtures 1 that do not require support brackets, the wireless unit 600 can be installed without increasing the number of components. In addition, the wireless unit 600 does not protrude from the cover 190. Therefore, the appearance of the lighting fixture 1 is good. Furthermore, since the wireless unit 600 is positioned lower than the upper end of the support bracket 2460, interference with power tools and the like can be suppressed.

[0077] According to Embodiment 2, heat from the light-emitting section 230 is dissipated solely by the top plate 390 without using the base 310. Therefore, in the case of low output, it does not become over-specified and no waste occurs. The lighting fixture 2000 can be broadly divided into high-output class and low-output class. The high-output class generates more heat from the light-emitting section 230 than the low-output class, so it is necessary to improve the heat dissipation performance. In the high-output class, the top plate 390 is on which the power supply 500 is placed and is fixed by the connecting member 170 by overlapping with the base-side portion 350 of the base 310, thereby functioning as a component that increases 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 section 230 is attached. Thus, in the low-output class, a simplified structure is adopted in which the light-emitting section 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 a heat sink 260. This allows for the standardization of sheet metal molds and processing for the lighting fixtures 2000 in both high-power and low-power classes, thereby reducing manufacturing costs. Thus, Embodiment 2 reduces mass and cost by using a modified version of the top plate 390 from Embodiment 1 as the base 310.

[0078] A certain distance is required between the horizontal arm portion 110 and the power supply 500 to prevent interference when the light source unit 180 is used at an angle. However, in the lighting fixture 2000 of Embodiment 2, which does not have fins 270, a support bracket 2460 is provided directly below the power supply 500. Therefore, compared to the lighting fixture 2000 of Embodiment 1, which has fins 270, the distance between the horizontal arm portion 110 and the power supply 500 is reduced by the height of the support bracket 2460. Consequently, the height of the central step portion 451 on the top plate 390 is higher than the height of the central step portion 381 on the base side of the base 310 by the height of the support bracket 2460. Therefore, when the base 310 is not used, the position where the arm 100 is fixed is moved away by the height of the central step portion 451 on the top plate 390, so the distance between the horizontal arm portion 110 and the power supply 500 can be the same regardless of whether the base 310 is used or not. Therefore, the arm 100 can be used interchangeably in both the high-power and low-power classes.

[0079] When the wireless unit 600 is attached to the top-side flat portion 400, it is possible to fix it without using the wireless mounting bracket 610, but holes need to be drilled in the areas around the cover 190 and the light-emitting substrate 240 where airtightness is required. By using the wireless mounting bracket 610, the ingress of foreign matter can be suppressed. It is also possible to attach the wireless unit 600 to the top-side bent portion 430, but since the cover 190 and the wireless mounting bracket 610 may interfere with each other, the length of the top-side bent portion 430 needs to be increased. In this case, the height of the wireless unit 600 will be higher than the height of the cover 190, which may block the light from the light-emitting portion 230. In this embodiment 2, since the wireless unit 600 is attached to the top-side side portion 420, light blocking can be avoided.

[0080] (modified version) Figure 22 is an assembled perspective view showing a modified lighting fixture 2000 according to Embodiment 2, and Figure 23 is a front view showing a modified lighting fixture 2000 according to Embodiment 2. Figure 24 is a perspective view showing a modified heat sink 260 according to Embodiment 2. As shown in Figures 22 to 24, in the modified version, a mounting hole 402 is formed on the top plate side flat portion 400, but a mounting hole 424 on the top plate side is not formed. A cylindrical wireless mounting member 610a for attaching a wireless unit 600 is crimped and fixed to the top plate side flat mounting hole 402. The wireless mounting member 610a protrudes from the top plate side flat portion 400, and its tip has a female thread that does not go all the way through. By using the wireless mounting member 610a, the wireless unit 600 can be attached to the top plate 390 without using a wireless mounting bracket 610. Furthermore, since the mounting holes 402 on the top panel side are sealed after installation, it is possible to prevent foreign matter such as dust from entering the cover 190. [Explanation of symbols]

[0081] 1 Lighting fixture, 2 Mounting part, 10 Working space, 100 Arm, 110 Horizontal part of arm, 120 Mounting hole, 130 Vertical part of arm, 131 Arm marking, 140 Arm flange part, 150 Arm connection part, 160 Crimping nut, 170 Connecting member, 171 Washer, 180 Light source unit, 190 Cover, 210 Peripheral fixing part, 220 Central fixing part, 221 First protrusion, 222 Second protrusion, 223 Cover through hole, 224 Fastening member, 225 Cylindrical part, 226 Threaded part, 230 Light-emitting part, 240 Light-emitting substrate, 241 Substrate insertion hole, 250 Light-emitting element, 260 Heat sink, 270 Fin, 280 Fin-side flat part, 290 Fin-side vertical part, 291 Groove part, 300 Fin insertion hole, 310 Base, 320 Base side flat surface, 321 Base fixing hole, 330 Projection, 340 Wiring insertion hole, 350 Base side surface, 351 Base marking, 360 Base side bend, 370 Base fastening part, 371 Base fastening hole, 380 Base insertion hole, 380a Base side step, 381 Base side center step, 382 Base side end step, 390 Top plate, 400 Top plate side flat surface, 402 Top plate side flat mounting hole, 410 Heat dissipation hole, 420 Top plate side surface, 421 Top plate marking, 424 Top plate side mounting hole, 430 Top plate side bend, 431 Bending mounting hole, 432 Top plate side bend extension, 440 Top plate side fastening hole, 450 Top panel insertion hole, 450a Top panel step, 451 Top panel center step, 452 Top panel end step, 460 Support bracket, 470 Support bottom, 480 Support top, 490 Support side, 500 Power supply, 510 Power supply board, 520 Case bottom, 530 Case top, 540 Power terminal block, 550 Terminal block mounting bracket, 560 Terminal block cover, 570 Wireless unit connector, 600 Wireless unit, 600a Horizontal part, 600b Vertical part, 610 Wireless mounting bracket, 610a Wireless mounting component, 611 Wireless horizontal mounting hole, 612 Wireless vertical mounting hole, 620 Outer casing, 623 Outer casing mounting hole, 630 Circuit board, 631 Connector, 632 Antenna, 640 Screws for wireless unit, 650 Harness, 2000 lighting fixture, 2460 support bracket, 2470 support base, 2480 support top, 2490 support side.

Claims

1. An arm having a horizontal arm portion that extends in one direction and is attached to the mounting part, and vertical arm portions that extend downward from both ends of the horizontal arm portion, A base having a pair of base-side side portions attached to the vertical portion of each of the arms, and a base-side planar portion connecting the pair of base-side side portions and on one side opposite to the horizontal portion of the arm to which a light-emitting portion is attached, A power supply is placed on the other side of the base opposite to one side of the base, A wireless unit is arranged in the area between the power supply and the base-side planar portion and connected to the power supply, A lighting fixture equipped with [the following features].

2. The arm further comprises a top plate having a pair of top plate side surfaces attached to the vertical portion of each arm, each having a top plate side insertion hole formed in a direction perpendicular to the aforementioned direction, and a top plate side surface connecting the pair of top plate side surfaces, The aforementioned wireless unit is Attached to the flat surface on the top plate side The lighting fixture according to claim 1.

3. The aforementioned top plate is It further has a top-side bent extension portion that extends downward from the top-side flat portion, The aforementioned wireless unit is Attached to the bent extension portion on the side of the top plate The lighting fixture according to claim 2.

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