Lighting fixtures

Abstract

To provide a luminaire that can secure heat dissipation performance and insulation performance.SOLUTION: A luminaire comprises a light source board 151, a base part 111 on which the light source board 151 is arranged, and two kinds of sheets 170 arranged between the light source board 151 and the base part 111. The two kinds of sheets 170 are a heat dissipation sheet 171 and an insulation sheet 172 overlapping at least partially. The insulation sheet 172 has a ring shape. At least a portion of the insulation sheet 172 is arranged outside the heat dissipation sheet 171. The insulation sheet 172 comprises a ring-shaped annular part 173, and a folded part 174 folded from an end part of the annular part 173.SELECTED DRAWING: Figure 26

Description

[Technical field]

[0001] The present invention relates to a lighting fixture. [Background technology]

[0002] 2. Description of the Related Art Conventionally, in a lighting fixture having a light emitting module in which a light emitting element is provided on a substrate, the substrate is attached to a heat sink via an insulating heat dissipation sheet. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-120763 A Summary of the Invention [Problem to be solved by the invention]

[0004] Generally, when fixing a substrate using a conductive base material to a conductive heat sink, an insulating material is used between them. This makes it possible to ensure insulation performance and prevent damage caused by external surges, etc. On the other hand, heat dissipation sheets that combine insulation and heat dissipation tend to be expensive because they are made up of a mixture of various materials.

[0005] The present invention provides a configuration that can ensure heat dissipation performance and insulation performance. [Means for solving the problem]

[0006] The lighting fixture of the present invention comprises: A light source substrate; a base portion on which the light source substrate is disposed; Two types of sheets are disposed between the light source substrate and the base portion; Equipped with: Effect of the Invention

[0007] According to the present invention, it is possible to ensure both heat dissipation performance and insulation performance by using two types of sheets with different functions. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a lighting fixture according to a first embodiment. [Diagram 2] FIG. 2 is an exploded perspective view of the lighting fixture according to the first embodiment. [Diagram 3] FIG. 2 is an exploded perspective view of the lighting fixture according to the first embodiment. [Figure 4] FIG. 2 is a perspective view of a heat sink 110 of the lighting fixture according to the first embodiment. [Diagram 5] 3 is a perspective view of a connecting portion 130 of the lighting fixture according to the first embodiment. FIG. [Figure 6] 3 is a perspective view of a reinforcing portion 140 of the lighting fixture according to the first embodiment. FIG. [Figure 7] FIG. 4 is a reference diagram showing how a reinforcing portion 140 is attached to a heat sink 110 of the lighting fixture according to the first embodiment. [Figure 8] FIG. 4 is a reference diagram showing how a connecting portion 130 is attached to a heat sink 110 of the lighting fixture according to the first embodiment. [Figure 9] FIG. 2 is an exploded perspective view of a case 123 of the lighting fixture according to the first embodiment. [Figure 10] 3 is a cross-sectional view of the lighting device according to the first embodiment taken along the line BB in FIG. 2. [Figure 11] FIG. 1 is a perspective view of an appliance mounting bracket 200 according to a first embodiment. [Figure 12] 1 is a diagram showing a state in which a lighting fixture according to a first embodiment is attached to a fixture mounting bracket 200. FIG. [Figure 13] 11 is a diagram showing a modified example of a case body 1231 of a power supply unit 120 for a lighting fixture according to the first embodiment. FIG. [Figure 14] FIG. 2 is a perspective view of a wiring through part 119 of the lighting fixture according to the first embodiment. [Figure 15] 3 is a schematic side view of a sheet 170 of the lighting device according to the first embodiment. FIG. [Figure 16] 3 is a cross-sectional view of a cover 160 of the lighting fixture according to the first embodiment. FIG. [Figure 17]3 is a diagram of a bent portion 1111 of a base portion 111 and a bent portion 1131 of a top plate portion 113 of the lighting fixture according to the first embodiment. FIG. [Figure 18] 3 is a diagram of a bent portion 1131 of a top panel portion 113 of the lighting fixture according to the first embodiment. FIG. [Figure 19] FIG. 3 is a diagram of a bent portion 1111 of a base portion 111 of the lighting fixture according to the first embodiment. [Figure 20] 1 is a perspective view of a connecting portion 130 having enhanced vibration resistance of the lighting fixture according to the first embodiment. FIG. [Figure 21] FIG. 2 is a partial perspective view of a cover 161 and a cover packing 162 of the lighting fixture according to the first embodiment. [Figure 22] FIG. 11 is a perspective view of a lighting fixture according to a second embodiment. [Figure 23] FIG. 11 is a side view of a lighting fixture according to a second embodiment. [Figure 24] FIG. 11 is an exploded perspective view of a lighting fixture according to a second embodiment. [Diagram 25] 11A and 11B are a perspective view and a side view of a heat sink 110 of a lighting fixture according to a second embodiment. [Figure 26] FIG. 11 is a mounting diagram of a base portion 111 of a lighting fixture according to a second embodiment. [Figure 27] 11A and 11B are three-view and a perspective view of an insulating sheet 172 of a lighting fixture according to a second embodiment. [Figure 28] 13 is a diagram showing a modified example of a bent portion 1111 of a base portion 111 according to the second embodiment. FIG. [Figure 29] FIG. 11 is a diagram showing a wiring through part 119 of a lighting fixture according to a second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, the embodiments of the present invention will be described with reference to the drawings. In each drawing, the same or corresponding parts are given the same reference numerals. In the description of the embodiments, the description of the same or corresponding parts will be omitted or simplified as appropriate. In addition, the material, shape, size, etc. of the configuration of the device, instrument, part, etc. can be changed as appropriate within the scope of the present invention.

[0010] Embodiment 1 The configuration of the lighting fixture according to the first embodiment will be described with reference to the drawings. ***Configuration Description*** ●Figure 1 (Lighting fixture 1) FIG. 1 is a perspective view of a lighting fixture 1 that is attached to the ceiling of a facility with a high ceiling, such as a gymnasium. The lighting fixture 1 includes an arm 10 that is attached to a mounting portion, and a light source unit 100 that is held on the arm 10 so as to be rotatable.

[0011] ●Figures 2 to 4 FIG. 2 is an exploded perspective view of the lighting device 1 of FIG. FIG. 3 is an exploded perspective view of the lighting fixture 1 as viewed in the direction of the arrow A in FIG.

[0012] The lighting fixture 1 includes an arm 10 and a light source unit 100. The light source unit 100 includes a heat sink 110, a power supply unit 120, a connecting portion 130, a reinforcing portion 140, a light source portion 150, a cover portion 160, and a sheet 170. .

[0013] (Arm 10) The arm 10 is formed in a substantially U-shape, and has a mounting hole 11 formed therein for fastening to a mounting portion with a fastener (such as a bolt).

[0014] (Heat sink 110) FIG. 4 is a perspective view of the heat sink 110. The heat sink 110 has a plate-shaped base portion 111 to which the light source portion 150 is attached, a plurality of fin portions 112 arranged radially on the base portion 111, and a top plate portion 113 attached so as to cover the fin portions 112. The base portion 111 and the top plate portion 113 are mounting members in the form of square or rectangular plates.

[0015] 4, base portion 111 and top plate portion 113 are squares with a side length of L, and have arcs at the corners with an interior angle of 90 degrees and a radius of R. The length of the straight line portion of each of the four sides of base portion 111 and top plate portion 113 is M, and L = M + 2R.

[0016] The base portion 111 has four screw holes 1119 at the corners and one screw hole 1118 in the center of each side. The screw holes 1118 are located closer to each side than the screw holes 1119 to avoid the fin portions 112.

[0017] The top panel 113 has four screw holes 1139 at the corners and two screw holes 1119 in the center of each side. The base portion 111 and the top plate portion 113 have a plurality of holes on the inside for fixing the fin portion 112 thereto. The base portion 111 and the top plate portion 113 are disposed apart from each other with the fin portion 112 therebetween.

[0018] The lower portion of fin portion 112 is fixed to base portion 111 , and the upper portion of fin portion 112 is fixed to top plate portion 113 . The upper and lower ends of the outer periphery of the fin portion 112 have notches 1121 to prevent interference with other parts and screws. The heat sink 110 may be composed of only the base portion 111 .

[0019] In this embodiment, fin portion 112 is a metal plate bent into a U-shape, but it may be a metal plate bent into an L-shape or an I-shape. Furthermore, fin portion 112 is not limited to being made of sheet metal, and may be manufactured by aluminum extrusion or aluminum die casting. Furthermore, base portion 111 and fin portion 112 may be integrated.

[0020] (Power supply unit 120) The power supply unit 120 receives power from an external source and supplies the power to the light source unit 150 for lighting. The power supply unit 120 includes a lighting circuit section 121 that converts external power into power for lighting the light source section 150, a harness 122 that connects to the lighting circuit section 121 and the light source section 150 and supplies power to the light source section 150, and a case section 123 that is attached to the top panel section 113 so as to cover the lighting circuit section 121. Two wires 1221 are provided at the end of the harness 122. The lighting circuit section 121 has a power supply board 1222 on which the lighting circuit is mounted.

[0021] (Connection part 130) The connecting portions 130 are disposed on both opposing sides of the heat sink 110, and the arms 10 are attached to the connecting portions 130.

[0022] (Reinforcement portion 140) The reinforcing portion 140 has a U-shaped cross section, and is attached so as to cover the side of the base portion of the heat sink 110. The reinforcing portion 140 supplements the strength of the heat sink 110 .

[0023] (Light source section 150) The light source section 150 includes a light source substrate 151 on which a plurality of light emitting elements are mounted as light sources, and a lens section 152 that is attached to cover the light source substrate 151 and controls the light from the light emitting elements to a predetermined light distribution. The light source unit 150 is thermally connected to a base unit 111 that serves as a mounting member. The lens section 152 is provided with a plurality of lenses in accordance with the light emitting elements.

[0024] (Cover part 160) The cover portion 160 transmits light from the light source portion 150 . The cover section 160 includes a cover 161 attached to the base section 111 so as to cover the light source section 150 , and a cover packing 162 sandwiched between the cover 161 and the base section 111 . The cover 161 has a box-shaped main cover 1611 with one side open, and a cover flange 1612 provided so as to protrude from the edge of the opening of the main cover 1611 . The cover packing 162 has an opening in the center and is disposed so as to be pressed between the cover flange portion 1612 and the base portion 111 .

[0025] ●Figures 5 to 8 The connecting portion 130 and the reinforcing portion 140 will be described with reference to FIGS. FIG. 5 is a perspective view of the connecting portion 130. As shown in FIG. FIG. 6 is a perspective view of the reinforcing portion 140. As shown in FIG. FIG. 7 is a reference diagram showing how to attach the reinforcing portion 140 to the heat sink 110. As shown in FIG. FIG. 8 is a reference diagram showing how to attach the connecting portion 130 to the heat sink 110. As shown in FIG.

[0026] (Connection part 130) The connecting portion 130 has a rectangular shape with a width L and a height that is the same as or approximately the same as the height of the heat sink 110. The connecting portion 130 has a rectangular connecting main portion 131 having a connecting opening 1311, a top plate side protruding portion 132 protruding from the upper side of the connecting main portion 131, a base side protruding portion 133 protruding from the lower side of the connecting main portion 131, and a pair of lateral protruding portions 134 protruding from both side sides of the connecting main portion 131.

[0027] The connecting main portion 131 has a window frame shape. The connecting main part 131 is a flat plate and has a connecting opening 1311 , a pillar part 1312 , a central pressing part 1313 which serves as a holding part, frame side parts 1314 , a frame lower part 1315 , and a frame upper part 1316 . The connecting opening 1311 is provided so as not to impede the heat dissipation of the fin portion 112 (so as not to impede the flow of air in and out).

[0028] The pillar portion 1312 is provided with a connection hole 13121 for connecting the arm 10 with a fastener such as a screw.

[0029] The central pressing portion 1313, together with the base side protruding portion 133, is a holding portion that sandwiches and holds the cover flange portion 1612, the cover packing 162, and the base portion 111. The central pressing portion 1313 has a holding hole portion 13131 into which a cover fastener 169 such as a screw is screwed and fixed.

[0030] Top plate side protrusion 132 has a rectangular shape with a width L and a depth R, and abuts against the side of top plate 113 where fin portion 112 is located (the lower surface side) to hold heat sink 110.

[0031] The base side protrusion 133 has a rectangular shape with a width L, a depth R at both ends and a depth at the center that is greater than R, and abuts against a cover flange 1612 of the cover part 160 to hold the cover part 160 .

[0032] The lateral protrusion 134 has a rectangular shape, with a depth at the top that is R and gradually increases in depth toward the bottom, with the depth at the bottom being 2R or more. The lateral protrusion 134 has a lateral pressing portion 1341 that abuts against the reinforcing portion 140 in order to improve the strength of the connecting portion 130 . The side pressing portion 1341 has a pressing cutout portion 13411 that comes into contact with a hole tube portion 141 described later. The pressing cutout portion 13411 is a semicircular or C-shaped cutout having an opening inwardly and perpendicularly intersecting the main connecting portion 131. The lower frame portion 1315 and the upper frame portion 1316 are the same height. The distance between the central pressing portion 1313 and the base side protruding portion 133 is the same as the height of the frame lower portion 1315 , and is also the same as the combined thickness of the cover flange portion 1612 and the base portion 111 .

[0033] (Reinforcement portion 140) The reinforcing portion 140 has a U-shaped cross section and a width M. The reinforcing portion 140 has an upper plate 147 , a back plate 148 , and a lower plate 149 . The reinforcing portion 140 is attached to the base portion 111 so as to sandwich the cover flange portion 1612, the cover packing 162, and the base portion 111 therebetween.

[0034] The distance between the upper plate 147 and the lower plate 149 is equal to the sum of the thickness of the cover flange portion 1612 and the thickness of the base portion 111 .

[0035] The reinforcing portion 140 is provided with a cylindrical hole portion 141 and a reinforcing hole portion 142 so as to be fixed to the base portion 111 together with the cover portion 160 and the like by a cover fixing tool 169 such as a screw. The reinforcing portion 140 has a sloped portion 143 at its tip, making it easier to insert. By attaching the reinforcing portion 140 to the base portion 111, the rigidity of the base portion 111 is improved, and the rigidity of the heat sink 110 is also improved. The reinforcing portion 140 has a function and effect similar to that of a beam, and is provided between the two connecting portions 130 to suppress bending of the heat sink 110.

[0036] ●Figures 9 and 10 The case 123 of the power supply unit 120 will be described with reference to FIGS. FIG. 9 is an exploded perspective view of the case portion 123. As shown in FIG. FIG. 10 is a cross-sectional view of the case portion 123 taken along line BB in FIG.

[0037] The case portion 123 has a case main body 1231 , a case packing 1232 , and a bushing 1233 . The case body 1231 is formed by pressing a plate-shaped metal member from one direction (direction C in FIG. 9 ), and includes a box-shaped main case portion 12311 with one side open, and a case packing 12321. 232 and a case flange 12313 which abuts against the top plate 113 and is fixed by a case fastener 129 such as a screw.

[0038] Case packing 1232 is formed of a resin member having elastic properties such as rubber, and is pressed and housed between step portion 12312 and top plate portion 113. By pressing and housed, case packing 1232 improves the sealing performance inside case main body 1231 and can prevent the intrusion of water, etc.

[0039] The case body 1231 can be made thinner and lighter than a cast case, thereby reducing the weight of the lighting fixture 1. In addition, the stiffness of the thinner case can be compensated for by providing multiple steps (steps formed by the main case part 12311, the step part 12312, and the case flange part 12313).

[0040] Furthermore, when the case body 1231 is formed by bending a cross-shaped metal plate, the ends of the bent plate are not connected to each other. This creates gaps that may allow water or the like to seep in. When a load is applied, there is a risk that the unconnected ends may deform, but by forming them as a single unit, these concerns can be alleviated.

[0041] Furthermore, case flange 12313 is provided around the entire circumference of step 12312 and can press against case packing 1232 all around, thereby ensuring better sealing.

[0042] ●Figures 11 and 12 11 and 12, an appliance mounting bracket 200 for fixing the lighting appliance 1 to a mounting base will be described.

[0043] FIG. 11(a) is a perspective view of the appliance mounting bracket 200. FIG. FIG. 12 is a diagram showing the lighting fixture 1 attached to the fixture mounting bracket 200 of FIG. 11(a). The fixture mounting bracket 200 is used to mount the lighting fixture 1 to a mounting base 900 having a vertical surface such as a wall.

[0044] The fixture mounting bracket 200 in FIG. 11(a) comprises a fixture mounting section 210 to which the lighting fixture 1 is attached, a fixture leg section 220 for fixing the fixture mounting bracket 200 to a mounting target section, a fixture body section 230, and a fixture waist section 240.

[0045] The bracket legs 220 are located on both sides of the fixture mounting bracket 200 and have a wall mounting portion 221 and a side portion 222. The wall mounting portion 221 is a flat plate portion that is fixed to the vertical surface of the mounting portion 900 by metal fixtures 901 such as screws. The side surface portion 222 is a plate portion in the shape of a right triangle perpendicular to the wall surface mounting portion 221, and has a curved portion 223 on the hypotenuse.

[0046] The metal fitting waist portion 240 is a rectangular flat plate portion having a pair of side portions 222 on both ends. The metal fitting waist portion 240 has a wire hole 241 in the center for passing the wire therethrough. The metal fitting body portion 230 is a rectangular flat plate portion that is perpendicular to the metal fitting waist portion 240 . The instrument mounting portion 210 is a rectangular flat plate portion that intersects with the metal fitting body 230 at an obtuse angle.

[0047] 12, the tool attachment portion 210 intersects with the bracket body 230 at an angle of 150 degrees, and the tool attachment portion 210 mounts the arm 10 at an angle of 30 degrees relative to the horizontal plane. The arm 10 can be mounted at an angle of 60 degrees relative to the vertical plane.

[0048] The fixture attachment portion 210 is provided with a fixture fixing hole 211 into which a fastener such as a bolt for fixing the lighting fixture 1 is attached.

[0049] The instrument fixing hole 211 is provided so that two openings of different sizes are continuous, with the larger hole on the upper side and the smaller hole on the lower side. Because the instrument fixing hole 211 has such a shape, the bolt 291 and nut 292, which are the fixing tools, are first temporarily fixed to the mounting hole 11 of the arm 10, and then the head of the bolt can be inserted into the larger diameter hole of the instrument fixing hole 211, and then slid into the smaller diameter hole (lower side).

[0050] In other words, the head of the bolt temporarily fixed to the arm 10 can be hooked into the tool fixing hole 211 and temporarily fixed, and then the bolt and nut 292 can be tightened, making installation easy.

[0051] Furthermore, when viewed from the side, a gap 250 is formed between the instrument mounting part 210 and the metal fitting leg part 220. The presence of this gap 250 makes it possible to insert a tool horizontally from the side into the inside of the instrument mounting metal fitting 200 when fastening a fastener, making the work easier (the worker does not have to reach behind).

[0052] Incidentally, a circular-arc curved portion 223 is formed on the side of the metal fitting leg portion 220 in FIG. 11(a), forming a gap 250 so that a tool can be inserted from the side.

[0053] Furthermore, by having the metal fitting body 230, even if the fastening between the bolt 291 and the nut 292 becomes loose and the lighting fixture 1 attempts to move, the head of the bolt interferes with the metal fitting body 230, thereby preventing the movement. FIG. 11(b) shows a modified example of the appliance mounting bracket 200. The appliance mounting bracket 200 in FIG. 11( b ) includes an appliance mounting portion 210 and a bracket leg portion 220 . The equipment mounting bracket 200 in FIG. 11(b) has a bracket leg 220 in the shape of a right-angled triangle. The side surface portion 222 and the tool attachment portion 210 are connected by being bent at a 90 degree intersection angle at a straight portion 224. A rectangular window 225 is formed in the side surface portion 222, and the window 225 forms a gap 250 so that a tool can be inserted from the side.

[0054] ●Figure 13 FIG. 13 shows a modified example of the case body 1231 of the power supply unit 120, and the case body 1231 may be cylindrical rather than box-shaped.

[0055] ●Figure 14 (Convex portion 114 of base portion 111 of heat sink 110 and packing structure) As shown in FIG. 14, a base portion 111 of a heat sink 110 is plate-shaped. The base portion 111 is made of, for example, an aluminum plate, but may be made of metal other than aluminum, such as stainless steel or iron.

[0056] As shown in FIG. 14( a ), the base portion 111 has a wiring through portion 119 . The wiring through portion 119 has a convex portion 114 and a packing 116 for passing wiring. The convex portion 114 is a wire passing portion. The convex portion 114 is formed in a convex shape facing the opposite direction to the direction in which the light source substrate 151 is installed. The convex portion 114 has a through hole 115 for passing a wiring 1221 for supplying power from the lighting circuit section 121 to the light source. A packing 116 for passing wires is fitted into the through hole 115 of this convex portion 114 .

[0057] The wire packing 116 prevents water and moisture from entering through the through hole 115 through which the wire 1221 passes. The wire-passing packing 116 is made of silicone rubber, fluororubber, etc. By providing the wire-passing packing 116 in this manner on the convex portion 114, water can be stopped. The wire-passing packing 116 has one or more wiring holes 117 for passing the wires 1221 therethrough. The packing 116 for passing wires passes through the wiring hole 117 with a wire 1221 having an outer diameter equal to or larger than the hole diameter of the wiring hole 117 .

[0058] Wire-passing packing 116 has wiring holes 117 in the same number as the number of wires 1221, and each wiring hole 117 passes only one wire. Moreover, the inside of wiring hole 117 is provided with projections and recesses so as to prevent the intrusion of water and moisture. Moreover, by making the outer shape of wire-passing packing 116 substantially the same as the inner shape of convex portion 114 of base portion 111, it is possible to reduce gaps when wire-passing packing 116 is attached to through-hole 115 of base portion 111.

[0059] As shown in FIG. 14( b ), the wire-passing packing 116 of the wire-passing portion 119 has a protruding portion 118 . The protruding portion 118 is a part of the wire-passing packing 116, and is a portion that protrudes from the base portion 111 of the heat sink 110 towards the side where the light source board 151 is located. The protrusion 118 is inserted into a board hole 153 of the light source board 151 . The protruding portion 118 has a protruding shape that corresponds to the board hole 153 of the light source board 151. In this embodiment, the protruding shape of the wire-passing packing 116 is an oval convex shape. As shown in FIG. 14(c), the substrate hole 153 of the light source substrate 151 may be an oval or elliptical hole, or may be a circle, a rectangle, a polygon, or another shape. As shown in (d) and (e) of FIG. 14, instead of the substrate hole 153, the protrusion 118 may be inserted into a substrate cutout portion 154 formed by cutting out an end portion of the light source substrate 151. The substrate cutout portion 154 in FIG. 14(d) is formed by cutting out a semicircular shape at the center of one side of the light source substrate 151. The board cutout portion 154 in FIG. 14(e) is formed by cutting out a protruding corner of the light source board 151 in a straight line.

[0060] By configuring the shape of the wire-passing gasket 116 to be thicker than the thickness of the light source board 151, it is possible to connect the wiring 1221 to the connection portion (connector) of the light source board 151 without the wiring 1221 touching the edge of the board hole 153 of the light source board 151. The light source substrate 151 has an oval substrate hole 153 near the outer circumference of the substrate, allowing the wiring 1221 to pass through.

[0061] This makes it possible to route the wiring 1221 to the outside without increasing the outer diameter of the light source substrate 151, and makes it possible to implement a wiring design without increasing the size of the lighting fixture.

[0062] According to the configuration shown in FIG. 14, even if the light source unit 150 and the heat sink 110 are in close contact with each other, a convex portion 114 having a through hole 115 is provided on the side opposite to the surface of the base portion 111 on which the light source unit 150 is placed, so that a member such as a waterproof member can be provided in the through hole 115 of the convex portion 114.

[0063] The convex portion 114 of the wiring through portion 119 can be formed at any position on the base portion 111, and the shape of the convex portion 114 is also free.

[0064] In this way, the layout of the wiring through-hole 119 can be easily changed, and restrictions on component placement can be eliminated while keeping the light source unit 150 and the heat sink 110 in close contact, making it possible to miniaturize the device. In other words, it is possible to route wiring without increasing the size of the device, and it is possible to provide a waterproof structure.

[0065] In addition, the through hole 115 of the convex portion 114 functions as a space between the light source portion 150 and the base portion 111, and by providing the through hole 115 (space) between the light source portion 150 and the base portion 111 and arranging a wire-passing gasket 116, which serves as a waterproof member, in the space between the light source portion 150 and the base portion 111, it is possible to easily ensure waterproof performance.

[0066] That is, according to the configuration shown in FIG. 14, it is possible to route the wiring without increasing the size of the device, and it is possible to provide a waterproof structure.

[0067] ●Figure 15 (Heat sink 110 and sheet 170 of light source substrate 151) A light source unit 150 is disposed on the opposite side of the base unit 111 of the heat sink 110 to the fin unit 112 .

[0068] The light source section 150 is composed of a light source substrate 151, and a light source and a connection section (connector) disposed on the light source substrate 151. The light source substrate 151 is made of aluminum, composite substrate epoxy resin (CEM3), glass cloth substrate epoxy resin (FR-4), paper phenol, or the like. If heat dissipation performance is required, the light source substrate 151 is preferably made of aluminum.

[0069] On the other hand, when the light source substrate 151 is made of aluminum, it is preferable to provide an insulator between the base portion 111 of the heat sink 110 and the light source substrate 151 in order to ensure insulation performance.

[0070] In this case, it is preferable to provide a heat dissipation sheet having insulating properties.

[0071] When heat dissipation capability is not required, an insulating sheet such as a polyethylene terephthalate (PET) sheet or a polycarbonate (PC) sheet may be provided. Generally, heat dissipation sheets are made by blending various materials, and therefore are more expensive than insulating sheets.

[0072] As shown in FIG. 15, sheet 170 of the present embodiment uses two types of sheets: heat dissipation sheet 171 serving as a heat conductive sheet, and insulating sheet 172. FIG. 15 is a schematic diagram showing the thicknesses of heat dissipation sheet 171 and insulating sheet 172 in an enlarged scale.

[0073] As shown in FIG. 15(a), one sheet of two types of sheets may entirely overlap the other sheet. In order to ensure an insulating distance from the outer periphery of the light source substrate 151 to the heat sink 110, the sheet 170 is provided with a heat dissipation sheet 171 having approximately the same shape as the light source substrate 151, and an insulating sheet 172 that overlaps the heat dissipation sheet 171 when viewed from the light emitting surface of the light source unit.

[0074] As shown in FIG. 15(b), the insulating sheet 172 may be formed in an annular, annular, or ring-like shape, so that one of the two types of sheets entirely overlaps with a part of the other sheet. stomach. Since insulating sheet 172 has a lower thermal conductivity than heat dissipation sheet 171, it is preferable that the portion that overlaps with heat dissipation sheet 171 be as small as possible. Therefore, insulating sheet 172 is preferably in a substantially ring shape with an opening in the center.

[0075] As shown in FIG. 15(c), the insulating sheet 172 may be formed in an annular, loop-like, or ring-like shape, with part of one of the two types of sheets overlapping part of the other sheet. At least a portion of insulating sheet 172 , ie, the inner edge of insulating sheet 172 , overlaps at least a portion of heat dissipation sheet 171 , ie, the outer edge of heat dissipation sheet 171 . At least a portion of insulating sheet 172 , that is, the outer edge portion of insulating sheet 172 , does not overlap heat dissipation sheet 171 and is disposed outside heat dissipation sheet 171 .

[0076] 15(d), the insulating heat dissipation sheet 171 may be made circular and smaller than the light source substrate 151, and the insulating sheet 172 may be made annular, annular, or ring-shaped, and disposed outside the heat dissipation sheet 171 without overlapping the heat dissipation sheet 171. This makes it possible to ensure an insulation distance from the outer periphery of the light source substrate 151 to the heat sink 110.

[0077] Furthermore, if there is a gap at the boundary between heat dissipation sheet 171 and insulating sheet 172, there is a possibility that an electrical path will be formed through that gap. Therefore, it is possible to ensure insulation performance by increasing the thickness of the sheet or by stacking the sheets to ensure a specified distance (required insulation distance).

[0078] Sheet 170 in FIG. 15 uses two types of sheets, thereby achieving both heat dissipation performance and insulating performance without increasing costs. 15, it is possible to ensure the insulation distance from the substrate edge while ensuring heat dissipation performance. Also, by providing insulating sheet 172 while reducing the size of heat dissipation sheet 171 having insulating performance, it is possible to ensure the insulation distance, which is also effective as a surge countermeasure, and it is possible to ensure the predetermined insulation performance with an inexpensive configuration.

[0079] ●Figure 16 (Configuration of cover part 160: film insert) A cover portion 160 for protecting the light source is disposed on the light source side of the base portion 111 of the heat sink 110. The cover portion 160 is made of resin such as PC or polymethylmethacrylate resin (PMMA), or made of a metal member such as aluminum die-cast, and glass. The material of the cover portion 160 can be changed appropriately depending on the usage environment.

[0080] For example, in a high-temperature environment or an environment containing oil, if the cover portion 160 is made of PC or PMMA resin, the heat resistance temperature or the aggressiveness of the oil may cause the resin to melt, deteriorate, or crack, and therefore it is preferable to make the cover portion 160 out of metal members and inorganic materials such as glass.

[0081] On the other hand, if metal and glass are used for the cover portion 160, the specific gravity is higher than that of resin, so the product weight becomes heavy. In addition, it is difficult to form the shape as a single unit like with resin, and there are issues such as poor assembly due to the increased number of parts and increased costs.

[0082] Therefore, in this embodiment, as shown in FIG. 16(a), cover 161 of cover unit 160 is composed of main body 1601 and film 1602. The main body 1601 of the cover 161 of the cover part 160 is made of resin such as PC or PMMA. In this case, a resin film 1602 made of a material other than PC or PMMA is integrally formed on the entire outer surface of the main body 1601 . By molding resin film 1602 integrally onto the entire outer surface of main body 1601, it is possible to complement weak portions of the main resin constituting cover 160.

[0083] For example, by using film 1602 made of a material such as PET or polyethylene naphthalate (PEN), even in environments containing various chemical substances such as oil or chemicals where it is difficult to use PC or PMMA, the barrier properties of film 1602 integrally molded into the outer shell make it possible to use resin cover portion 160 without affecting the main resin. Specifically, since polycarbonate is vulnerable to oil, an oil-resistant film is provided on the outside.

[0084] The cover 161 may be provided with different types of films 1602 depending on the parts of the outer shell. The different types of films include a heat-resistant film, an oil-resistant film, a reinforced film, a polarizing film, a diffusion film, a color film, a reflective film, and the like. As shown in (a), (b), and (c) of FIGS. 16A, 16B, and 16C, the cover 161 has different types of films 1602, 1603, and 1604 arranged on the underside of the main body portion 1601, the sides of the main body portion 1601, and the underside of the cover flange portion 1612. As shown in FIG. 16(d), films 1602 and 1603 may be provided on the lower and upper surfaces of a main body 1601 of a cover 161. As shown in FIG. 16(e), two or more different types of films 1602, 1603 may be disposed on the lower surface of the main body 1601 of the cover 161 in a fully layered or partially layered manner.

[0085] Specifically, the following configurations and combinations thereof are possible: A reinforced film is provided on the inner surface, outer surface, or both surfaces of the cover flange 1612. -Reinforced film is installed on the corners of the main cover. - Reinforced film is installed on the underside of the main cover. -Reinforced film is applied to the sides of the main cover. -Reflective film is provided on the sides of the main cover. -A heat-resistant or oil-resistant film is provided on the outer surface of the main cover. -Polarizing film, diffusion film or color film is arranged on the inside of the main cover. According to the configuration of FIG. 16, different types of films are provided depending on the area of ​​cover 161, so that protection suited to the area of ​​cover 161 can be provided.

[0086] By imparting optical properties to the film 1602, it is possible to give it the function of changing the direction of light and the function of controlling light distribution at the same time. Methods of imparting optical properties to the film 1602 include blending a diffusing material, pigment, or dye into the film 1602, arranging a geometric pattern, controlling light distribution by changing the cross-sectional shape, and the like.

[0087] This makes it possible to easily ensure performance suited to the intended use of the lighting fixture by changing film 1602 without changing the main resin of cover portion 160.

[0088] In addition, in this embodiment, the lens of lens unit 152 is arranged on the light source of light source substrate 151, but the lens may be formed integrally with the inner surface of main body 1601 of cover unit 160.

[0089] According to the configuration of FIG. 16, it is possible to complement the weak physical properties of the basic resin by disposing a film on the outer periphery of the molded product without carrying out coating or two-color (multi-color) molding.

[0090] Figure 2 (Waterproofing by packing of heat sink 110 and cover part 160) As shown in FIG. 2, the cover 161 has a main cover 1611 that covers the light source unit 150, and a cover flange 1612 that is fixed to the base unit.

[0091] The cover gasket 162 is a waterproof member that is fixed in close contact with the cover flange portion 1612 and the base portion 111 . The cover gasket 162 is a water-tight gasket having an annular shape that fits along the cover flange 1612 .

[0092] The base portion 111 and the cover portion 160 of the heat sink 110 are fixed together by a cover fastener 169 , which is a fastening member such as a screw, and the reinforcing portion 140 . In the absence of cover gasket 162 , cover fastener 169 fastens cover 161 to base portion 111 . The base portion 111 and the cover portion 160 are fixed together by a cover fastener 169 , and the reinforcing portion 140 may not be required to fix the base portion 111 and the cover portion 160 together.

[0093] When the cover packing 162 is present, the cover fastener 169 brings the cover packing 162 into close contact between the base portion 111 and the cover 161 , thereby fastening the cover 161 to the base portion 111 .

[0094] Normally, when a lighting fixture is used indoors, there is no problem with a structure that fixes it with fastening members such as screws. However, when the lighting fixture is used under the eaves or on the roof side, water or moisture may get in due to rainfall, and if there are gaps between parts, there is a concern that the water may get in and cause insulation failure or rusting of the parts.

[0095] Therefore, in this embodiment, cover packing 162 having a shape that matches the shape of the portion of cover part 160 that contacts base part 111 of heat sink 110 is disposed between base part 111 (plate-shaped mounting member) of heat sink 110 and cover part 160 to prevent the intrusion of water and moisture. Cover packing 162 is made of silicone rubber or fluororubber.

[0096] A waterproof member is clamped between either the contact surface between the head of the screw and base portion 111 or the contact surface between the head of the screw and cover 161. The base portion 111 of the heat sink 110, the cover packing 162, and the cover portion 160 are fixed with a cover fastener 169 such as a screw. If the screw is used as is, water or moisture may get in through the gap at the tip of the screw or the head of the screw.

[0097] For this reason, it is desirable to provide a waterproof washer (a metal or resin washer with a waterproof material such as rubber integrated on one side) on the screw head side.

[0098] In addition, a waterproofing member is provided at the tip of the screw (screw tip). In addition to the waterproof washer on the screw head side, it is desirable to provide a waterproof washer and a cap nut on the screw tip side as well. Alternatively, a crimp nut or the like may be pressed into the base portion 111 of the heat sink 110 in advance, thereby making it unnecessary to process the screw tip side.

[0099] According to the configuration of Figure 2, cover fixing device 169 and reinforcing portion 140 fix base portion 111 and cover 161 regardless of the presence or absence of cover gasket 162, so it is possible to construct a fixture that requires waterproof performance without changing the structure of the lighting fixture.

[0100] Furthermore, according to the configuration of FIG. 2, even if the number of light source units is increased or decreased, it is possible to configure a lighting fixture that does not require waterproof performance and a fixture that does require waterproof performance by simply adding or removing one cover gasket 162 (one waterproof member) without changing the structure of the lighting fixture.

[0101] Moreover, according to the configuration of FIG. 2, it is possible to provide waterproof performance by sharing parts with non-waterproof general equipment and adding only one cover packing 162.

[0102] ●Figures 6 and 7 (Reinforcing portion 140 suppressing deformation of base portion 111 of heat sink 110) When a waterproof structure is achieved by sandwiching cover gasket 162 between base portion 111 (plate-shaped mounting member) and cover portion 160 of heat sink 110, if base portion 111 of heat sink 110 is made of a plate material such as sheet metal and is fixed in place with a fixing member such as a screw, there is a possibility that base portion 111 of heat sink 110 will be deformed by sandwiching cover gasket 162 (while being crushed).

[0103] Therefore, in this embodiment, as shown in FIG. 6, in addition to the base portion 111, cover gasket 162, and cover portion 160 of the heat sink 110, a reinforcing member is provided as the reinforcing portion 140 to prevent deformation of the base portion 111 of the heat sink 110.

[0104] The reinforcing member is provided to increase the rigidity of the end portion (outer peripheral surface) of the base portion 111 of the heat sink 110. Methods for increasing the rigidity of the base portion 111 include the following configurations. (1) The thickness of the base portion 111 is increased. (2) A U-shaped part is fixed to the end cross section of the base portion 111 to increase the section modulus. (3) An L-shaped part is fixed to the end cross section of the base portion 111 to increase the section modulus.

[0105] In the case of increasing the plate thickness of (1), the following configurations can be mentioned. (1-1) The thickness of the entire base portion 111 is increased. (1-2) A ring plate having the same outer circumferential shape as the outer circumferential shape of the base portion 111 is fixed to the outer edge of the base portion 111.

[0106] When the cross section of (2) is U-shaped, a reinforcing part 140 having a U-shaped cross section is attached. The U-shaped reinforcing part 140 is disposed so as to sandwich the cover part 160, the cover packing 162, and the base part 111.

[0107] The reinforcing portion 140 will be described below with reference to FIG. The reinforcing portion 140 is fixed to the edge of the base portion 111 . The reinforcing portion 140 is an individual component having a substantially U-shaped cross section, and sandwiches the base portion 111 and the cover 161. Alternatively, the reinforcing portion 140 sandwiches the base portion 111, the cover packing 162, and the cover 161.

[0108] The reinforcing portion 140 has an upper plate 147 , a back plate 148 , and a lower plate 149 . The upper plate 147 has three cylindrical holes 141 at both ends and in the center. The cylindrical hole portion 141 protrudes in a cylindrical shape from the upper surface of the upper plate 147, and a thread is formed on the inner wall into which a cover fastener 169 such as a screw is fitted. The lower plate 149 has three reinforcing holes 142 at both ends and in the center. The reinforcing hole 142 is a through hole through which a cover fastener 169 such as a screw passes. The upper plate 147 has an upper recess 1471 whose center is recessed toward the back plate 148 . The upper recess 1471 is recessed in an arc shape so as not to interfere with the circular outer circumference of the fin portion 112. There are. On both sides of the reinforcing hole 142 in the center of the upper recess 1471 , there are cutouts 1472 so as not to interfere with the outer ends of the fins 112 arranged on both sides of the reinforcing hole 142 . The lower plate 149 has a lower recess 1481 in the center that is recessed toward the back plate 148 . The lower recess 1481 is recessed in a trapezoidal shape so as not to interfere with the outer periphery of the base of the main cover 1611 of the cover portion 160 . Since the circular outer periphery of fin portion 112 bulges outward from the outer periphery of the base of main cover 1611 , the amount of depression of upper depression 1471 is greater than the amount of depression of lower depression 1481 .

[0109] The central cylindrical hole portion 141 and the central reinforcing hole portion 142 are formed at positions closer to the back plate 148 than the two cylindrical hole portions 141 and the two reinforcing hole portions 142 on either side. The upper plate 147 has five inclined portions 143 formed parallel to the back plate 148 . The lower plate 149 has four inclined portions 143 formed parallel to the back plate 148 . Except for both ends of the upper plate 147, the inclined portions 143 are arranged on all sides of the upper plate 147 and the lower plate 149 that are parallel to the back plate 148. Since the side holding portions 1341 are placed on both ends of the upper plate 147, the inclined portions 143 are not present on both ends of the upper plate 147. Since both ends of the lower plate 149 do not interfere with the base-side protruding portion 133, the lower plate 149 has inclined portions 143 at both ends.

[0110] (Method of attaching the reinforcing portion 140) As shown in FIG. 7, reinforcing portion 140 is inserted from the side so as to sandwich cover flange portion 1612 , cover packing 162 and base portion 111 , and is fixed to the straight portion of base portion 111 with cover fixing members 169 .

[0111] At this time, the reinforcing portion 140 is inserted so as to press the cover packing 162 . The reinforcing portion 140 has an inclined portion 143, so that it can be easily inserted. Reinforcing portion 140 has a width M, base portion 111 has a length L, and the ends of reinforcing portion 140 are each spaced a distance R from the sides perpendicular to the side to which reinforcing portion 140 is attached.

[0112] (Method of attaching the connecting portion 130) 8, the connecting portion 130 is attached by being inserted from the side of the heat sink 110. The distance between the central pressing portion 1313 and the base side protruding portion 133 is smaller than the distance between the side pressing portion 1341 and the base side protruding portion 133 by the thickness of the upper plate 147 of the reinforcing portion 140.

[0113] The relationship of each part when installed is as follows: The top plate side protrusion 132 abuts against the side (lower surface side) of the top plate portion 113 on which the fin portion 112 is located. The base side protrusion 133 abuts against the cover flange 1612 . Since the base side protrusion 133 has a depth R, the base side protrusion 133 does not collide with the lower plate 149 of the reinforcing part 140 . The center pressing portion 1313, together with the base side protruding portion 133, sandwiches and holds the cover flange portion 1612 and the cover packing 162. At this time, the cover packing 162 is pressed toward the base portion 111. The side pressing portion 1341, together with the base side protruding portion 133, sandwiches and holds the cover flange portion 1612, the cover packing 162, the base portion 111, and the upper plate 147 of the reinforcing portion 140. At this time, the cover packing 162 is pressed toward the base portion 111. The side pressing portion 1341 is in contact with the upper end surface of the upper plate 147 of the reinforcing portion 140 (not shown in FIG. 8). To abut.

[0114] The end of the upper plate 147 of the reinforcing part 140 is separated from the main connecting part 131 of the connecting part 130 by R, but since the depth of the side holding part 1341 is 2R or more, the side holding part 1341 can be placed on the upper surface of the end of the upper plate 147.

[0115] The contact of the side retaining portion 1341 with the reinforcing portion 140 increases resistance to loads such as shaking or twisting, improving the strength of the lighting fixture 1. In addition, by placing the side retaining portion 1341 on the end portion of the upper plate 147 of the reinforcing portion 140 at the corner of the base portion 111, deformation of the base portion 111 in the diagonal direction is suppressed.

[0116] In addition, since the pressing cutout portion 13411 abuts against the cylindrical hole portion 141, it is possible to suppress catching and twisting when a load such as twisting is applied. In addition, the pressing cutout portion 13411 abuts against the outer peripheral wall of the cylindrical hole portion 141, preventing the reinforcing portion 140 from coming off.

[0117] When reinforcing portion 140 is an individual component having an L-shaped cross section, reinforcing portion 140 having an L-shaped cross section is attached. Reinforcing portion 140 having an L-shaped cross section covers the edges and end faces of base portion 111.

[0118] An L-shaped metal fitting is placed on the base portion 111 of the heat sink 110 as a reinforcing member, and the cover portion 160, the cover gasket 162, and the base portion 111 of the heat sink 110 are fastened together, thereby enabling the base portion 111 of the heat sink 110 to be fixed while suppressing deformation of the base portion 111 of the heat sink 110.

[0119] By attaching a reinforcing member such as reinforcing portion 140 shown in FIG. 6 around the periphery of base portion 111, deformation of base portion 111 can be prevented. The reinforcing portion 140 shown in FIG. 6 suppresses deformation of the plate-like base portion 111, and by sandwiching the cover packing 162, it is possible to reduce the weight of the device while ensuring waterproof performance. Furthermore, when the reinforcing portion 140 is made of a metal such as aluminum or iron, and the cover 161 is made of a metal such as aluminum die-cast (aluminum die-cast material), a heat dissipation effect can be expected. That is, the heat of the heat sink 110 can be transferred to the aluminum die-cast cover 161 via the reinforcing portion 140.

[0120] ●Figure 17 (Suppression of deformation of base portion 111 of heat sink 110) The peripheral edge of the base portion 111 is bent by 90 degrees to form an outer periphery of the base portion 111 having an L-shaped cross section. As a method for increasing the rigidity of the base portion 111 of the heat sink 110 without using a reinforcing member, it is possible to consider bending the end portion of the base portion 111 of the heat sink 110 as shown in FIG.

[0121] The base portion 111 has a circular light source fixing portion 1112 to which the light source portion 150 is fixed on the lower surface, and a bent portion 1111 bent downward from the outer end portion of the light source fixing portion 1112. The bent portion 1111 is formed by bending one entire side of the base portion 111 along a straight bending line parallel to the side of the base portion 111 . Top plate portion 113 has a circular fin fixing portion 1132 that fixes fin portion 112 to the lower surface thereof, and a bent portion 1131 that is bent downward from the outer end portion of fin fixing portion 1132 . The bent portion 1131 is formed by bending one entire side of the top plate portion 113 along a straight bending line parallel to the side of the top plate portion 113 .

[0122] 17(a), the bent portion 1111 is bent downward by 90 degrees from the end of the light source fixing portion 1112. Similarly, the bent portion 1131 is bent downward by 90 degrees from the end of the fin fixing portion 1132.

[0123] 17(b), the bent portion 1111 is bent downward at an angle greater than 90 degrees and less than or equal to 180 degrees from the end of the light source fixing portion 1112. Similarly, the bent portion 1131 is bent downward at an angle greater than 90 degrees and less than or equal to 180 degrees from the end of the fin fixing portion 1132.

[0124] A bent portion may be formed in only one of base portion 111 and top plate portion 113. That is, a bent portion may be formed in at least one of base portion 111 and top plate portion 113. Bent portions 1111 and 1131 are formed on a pair of opposing sides to which connecting portion 130 is not fixed. In this embodiment, base portion 111 and top plate portion 113 are rectangular, connecting portion 130 is fixed to two opposing sides of the rectangle, and bent portions are formed on the remaining two opposing sides of the rectangle.

[0125] When a reinforcing member is added, the number of parts must be increased. However, when base portion 111 of heat sink 110 is bent, it is possible to increase rigidity without changing the number of parts.

[0126] In the case of a waterproof device, it is expected that water will directly splash onto the device. If water accumulates inside the device, it may cause rust or water to seep in. Therefore, as shown in Figs. 25 and 28, it is preferable that the bending direction of the bent portion 1111 at the end of the base portion 111 of the heat sink 110 is opposite to the fin portion 112 of the heat sink 110.

[0127] If the base portion 111 of the heat sink 110 is bent in the same direction as the fin portion 112 of the heat sink 110, the base portion 111 of the heat sink 110 will become tray-shaped and water will accumulate therein. By bending the heat sink 110 in the opposite direction to the fin portion 112, even if water is splashed on the heat sink 110, the water flows away without stagnating. Even in a device that does not have a packing, bending the end of the base portion 111 of the heat sink 110 is an effective method for increasing the rigidity of the base portion 111 of the heat sink 110. Increasing the rigidity of the base portion 111 of the heat sink 110 makes it possible to directly fix the ceiling mounting arm 10 to the base portion 111 of the heat sink 110.

[0128] The case of the top plate portion 113 is similar to that of the base portion 111 . According to the configuration of Figure 17, by providing a bent portion on each side of the base portion 111 or the top plate portion 113 of the heat sink 110, deformation can be suppressed, and when a gasket or the like is tightened to the base portion 111 or the top plate portion 113, deformation of the base portion 111 or the top plate portion 113 and the gasket, etc. can be suppressed.

[0129] FIG. 18 is a diagram showing a modified example of the bent portion 1131 of the top plate portion 113. As shown in FIG. 1(a), the bent portion 1131 of the top plate portion 113 is bent downward by 90 degrees to form an L-shaped cross-sectional shape perpendicular to the side of the base portion 111, the top plate side protrusion portion 132 of the connecting portion 130 is placed on top of the top plate portion 113, the bent portion 1131 is placed inside the main connecting portion 131 of the connecting portion 130, and the bent portion 1131 and the main connecting portion 131 are fixed with a top plate fixing device 137 such as a screw.

[0130] 1B, the bent portion 1131 of the top plate portion 113 is bent downward by 90 degrees to make the cross-sectional shape perpendicular to the side of the base portion 111 an L-shape, the top plate side protrusion portion 132 of the connecting portion 130 is placed under the top plate portion 113, and the bent portion 1131 is placed on the outside of the main connecting portion 131 of the connecting portion 130, and the top plate side protrusion portion 132 and The top plate portion 113 is fixed with a top plate fixing device 137 such as a screw.

[0131] (c) shows a structure in which the top plate side protruding portion 132 is removed from the connecting portion 130, the bent portion 1131 of the top plate portion 113 is bent downward by 90 degrees to give an L-shaped cross-sectional shape perpendicular to the side of the base portion 111, the bent portion 1131 is placed inside the main connecting portion 131 of the connecting portion 130, and the bent portion 1131 and the main connecting portion 131 are fixed with a top plate fixing device 137 such as a screw.

[0132] (d) shows that the top plate side protrusion 132 has been removed from the connecting portion 130, and the bent portion 1131 of the top plate portion 113 has been bent downward by 90 degrees to form an L shape, with the bent portion 1131 being on the outside of the main connecting portion 131 of the connecting portion 130, and the bent portion 1131 and the main connecting portion 131 being fixed together with a top plate fixing device 137 such as a screw.

[0133] (e) shows that the bent portion 1131 of the top plate portion 113 is bent 180 degrees to form a U-shaped cross-sectional shape perpendicular to the sides of the base portion 111, and the bent portion 1131 is placed on top of the top plate side protrusion portion 132 of the connecting portion 130, and the top plate portion 113, bent portion 1131, and top plate side protrusion portion 132 are fixed together with a top plate fixing device 137 such as a screw.

[0134] (f) shows that the bent portion 1131 of the top plate portion 113 is bent 180 degrees to form a U-shaped cross-sectional shape perpendicular to the sides of the base portion 111, and the bent portion 1131 is placed below the top plate side protrusion portion 132 of the connecting portion 130, and the top plate portion 113, the bent portion 1131, and the top plate side protrusion portion 132 are fixed together with a top plate fixing device 137 such as a screw.

[0135] In the configurations (c) and (d), there are absolutely no parts protruding from the upper surface of the top plate portion 113. In the configurations of (b) and (e), the only parts protruding from the upper surface of the top plate portion 113 are the screw heads of the top plate fixing fixtures 137.

[0136] FIG. 19 is a diagram showing a modified example of the bent portion 1111 of the base portion 111. In FIG. 1A, the bent portion 1111 of the base portion 111 is bent downward by 90 degrees so that the cross-sectional shape perpendicular to the side of the base portion 111 is L-shaped, the bent portion 1111 is on the outside of the cover flange portion 1612, the base side protrusion portion 133 of the connecting portion 130 is below the lower tip of the bent portion 1111, the bent portion 1111 is on the inside of the main connecting portion 131 of the connecting portion 130, and the central pressing portion 1313 and the base side protrusion portion 133 are fixed by a cover fixing device 169 such as a screw between the cover flange portion 1612 and the base portion 111.

[0137] 1B, the bent portion 1111 of the base portion 111 is bent twice by 90 degrees to form a U-shaped cross-sectional shape perpendicular to the sides of the base portion 111, and the cover flange portion 1612 is placed in close contact with the U-shaped recess of the bent portion 1111. The bent portion 1111 is placed inside the main connecting portion 131 of the connecting portion 130, and the cover flange portion 1612, the base portion 111, and the base portion 111 are sandwiched between the central pressing portion 1313 and the base side protruding portion 133 and fixed with a cover fixing device 169 such as a screw.

[0138] 13C, the bent portion 1111 of the base portion 111 is bent 180 degrees to form a U-shaped cross-sectional shape perpendicular to the sides of the base portion 111, with the bent portion 1111 on the outside of the cover flange portion 1612 and the bent portion 1111 on the inside of the main connecting portion 131 of the connecting portion 130, and the cover flange portion 1612 and the base portion 111 are sandwiched between the central pressing portion 1313 and the base side protruding portion 133 and fixed with a cover fixing device 169 such as a screw. Although not shown, in a portion where there is no central pressing portion 1313, the base portion 111 and the base side protruding portion 133 may be fixed with a cover fastener 169 such as a screw, sandwiching the cover flange portion 1612 therebetween.

[0139] ●Figures 9 and 10 (Power supply case draw structure) The lighting device 1 has a lighting circuit section 121 and a case section 123 that covers the lighting circuit section 121. In this embodiment, lighting circuit section 121 and case section 123 are placed on top of top plate section 113 disposed on top of heat sink 110 .

[0140] The lighting circuit section 121 and the case section 123 may be placed directly on the base section 111 of the heat sink 110 instead of on the top plate section 113, or may be attached to the arm 10 for ceiling mounting. Also, a space may be provided above the fin section 112 of the heat sink 110, and the case section 123 may be attached across the left and right sides of the arm 10. The case 123 has a function of protecting the lighting circuit 121. Specifically, the function is to prevent direct contact with the power supply board 1222, to prevent dust from accumulating, to ensure insulation performance, and the like.

[0141] Generally, when making the box-shaped case 123 from sheet metal, the box shape is formed by bending the unfolded shape of a roughly cross shape. In this case, gaps are created at the ridges (butt joints) of the surfaces that are bent and raised. If there are gaps, there is a risk of dust accumulating as mentioned above, or of the board coming into contact with the board. Therefore, it is possible to solve the above problem by welding the ridges (butt joints), but welding takes time to process and requires confirmation that the welding has been done without any gaps.

[0142] In this embodiment, in order to solve the above problem, a single plate material (sheet metal) is drawn (deep drawn) to form a gap-free box-shaped (cylindrical) case portion 123. The drawing can be performed by pressing or the like. The box-shaped shape is formed by pressing from one direction, and one side is open.

[0143] Case portion 123 is a seamless recess formed from a single metal plate and houses lighting circuit portion 121 in the recess. Case portion 123 has a recessed main case portion 12311 having an opening, a step portion 12312 formed around the opening, and a case flange portion 12313 formed around the step portion 12312. The step portion 12312 is a packing housing portion that houses the case packing 1232. The step portion 12312 is in the form of a staircase. The step portion 12312 has a horizontal ring portion 12314 and a vertical band portion 12315 . The horizontal ring portion 12314 is located between the main case portion 12311 and the vertical band portion 12315 and is a rectangular ring portion parallel to the case flange portion 12313. The vertical band portion 12315 is located between the horizontal ring portion 12314 and the case flange portion 12313 and is a circular band portion parallel to the side surface of the main case portion 12311. The case portion 123 is formed by drawing a single metal plate from one direction, and each corner has no sharp edges and all corners are curved.

[0144] When waterproofing the case part 123, this can be easily achieved by arranging a ring-shaped case packing 1232 on the opening side of the case part 123. The case gasket 1232 is disposed on the step portion 12312 and is sandwiched between the step portion 12312 and the top plate portion 113 . The case packing 1232 has a rectangular annular frame, and the cross section of the frame is rectangular. The outer shape of the case gasket 1232 is the same as the inner shape of the vertical band portion 12315. The height of the case gasket 1232 is higher than the height of the vertical band portion 12315, but is compressed by the horizontal ring portion 12314 and the case flange portion 12313 to make it the same height as the vertical band portion 12315. The case packing 1232 has two annular projections 113 on its lower surface, which is in intimate contact with the upper surface of the top plate 113. Has 2321. The annular protrusion 12321 is deformed by pressure applied by the horizontal ring portion 12314 and the top plate portion 113, thereby improving the water-stopping effect. The case packing 1232 has two annular ridges 12322 on its outer surface which is in intimate contact with the inner surface of the vertical band portion 12315 .

[0145] When the case packing 1232 is pressurized and expands outward, the annular ridge portion 12322 is pressed against the inner wall of the vertical band portion 12315 and deforms, improving the water blocking effect. Case packing 1232 is preferably made of silicone rubber or fluororubber.

[0146] In addition, when fixing the case portion 123 to the top plate portion 113, as with the base portion 111 of the heat sink 110 described above, the rigidity of the top plate portion 113 can be increased by bending the ends of the top plate portion 113, and deformation of the top plate portion 113 can be suppressed.

[0147] Moreover, by bending the case 123 in the opposite direction (downward), it is possible to prevent water from accumulating.

[0148] Case portion 123 shown in Figures 9 and 10 is formed by pressing from one direction and has a (cylindrical) box-shaped power supply storage portion with one open side, and since case portion 123 does not have any abutting portions on the side portions, airtightness can be easily ensured.

[0149] As a result, there are absolutely no gaps at any of the corners of the case portion 123, and airtightness can be easily ensured without post-processing such as welding the ridges (butt joints), making it possible to prevent the intrusion of dust and water.

[0150] Furthermore, since case fixing device 129 fixes top panel portion 113 and case portion 123 together regardless of the presence or absence of case packing 1232, it is possible to configure a fixture that requires waterproof performance without changing the structure of the lighting fixture.

[0151] Furthermore, it is possible to configure an appliance that does not require waterproof performance and an appliance that does require waterproof performance simply by the presence or absence of one case packing 1232 (one waterproof member).

[0152] In addition, it is possible to share parts with non-waterproof general equipment and impart waterproof performance by adding only one case gasket 1232.

[0153] ●Figures 5 and 8 (Fixed portion 139 of connecting portion 130) A cover portion 160 is fixed to a base portion 111 of the heat sink 110 by a cover fastener 169 which is a fastening member such as a screw. Furthermore, a top plate portion 113 is provided on the heat sink 110, and a lighting circuit portion 121 and a case portion 123 are fixed on top of the top plate portion 113. The base portion 111 and the top plate portion 113 of the heat sink 110 are fixed together by a connecting portion 130 .

[0154] The arm 10 for ceiling mounting is also fixed to this connecting portion 130. The connecting portion 130 is a metal fixture that fixes the base portion 111, the top plate portion 113, and the cover portion 160 together. The lateral protrusions 134 are connection parts extending in the vertical direction. The side protrusion 134 has a vertically long shape. The width of the tip portion gradually increases as it approaches the base portion 111.

[0155] The top plate side protrusion 132 is an upper fixing part for mounting the top plate part 113 . The base side protrusion 133 is a lower fixed part that covers and supports the cover part 160 . The side pressing portion 1341 is located between the upper fixing portion and the lower fixing portion, and is an intermediate fixing portion that fixes the screw that penetrates the base portion 111 of the heat sink 110 and receives the base portion 111 of the heat sink 110.

[0156] The connecting portion 130 connects the base portion 111 and the top plate portion 113 and fixes the cover portion 160 and the base portion 111 together. The connecting portion 130 has a flat connecting main portion 131 located between the top plate portion 113 and the base portion 111 . The connecting portion 130 has a fixing portion 139 at the lower portion thereof, which sandwiches and fixes the cover portion 160 and the base portion 111 .

[0157] The fixing portion 139 is made up of the base side protruding portion 133 , side pressing portions 1341 and a central pressing portion 1313 . The base side protruding portion 133 is perpendicular to the connecting main portion 131 at the lower end of the connecting main portion 131 . The base side protrusion 133 covers the lower surface of the edge of the cover portion 160 , that is, the lower surface of the cover flange portion 1612 .

[0158] The base side protrusion 133 is formed by bending the lower end of the main connection portion 131 by 90 degrees. The side pressing portions 1341 and the central pressing portion 1313 are disposed midway along the main connecting portion 131 in parallel with the base side protruding portion 133 .

[0159] The side pressing portion 1341 covers the upper surface of the end portion of the reinforcing portion 140 . The central pressing portion 1313 covers the upper surface of the center of the edge of the base portion 111 . The connecting portion 130 has a lateral protruding portion 134 that is perpendicular to the connecting main portion 131 at a side end of the connecting main portion 131 . The lateral protrusion 134 can be formed by bending the lateral end of the main connecting portion 131 by 90 degrees. The side pressing portion 1341 is perpendicular to the side protruding portion 134 below the side protruding portion 134 . The side pressing portion 1341 can be formed by bending the lower end portion of the side protruding portion 134 inward by 90 degrees.

[0160] The side pressing portion 1341 is a plate that presses the end portion of the base portion 111 . The connecting portion 130 has a pillar portion 1312 at the center of the connecting main portion 131, The central pressing portion 1313 is perpendicular to the column portion 1312 below the column portion 1312 . The central pressing portion 1313 can be formed by cutting out a part of the lower portion of the pillar portion 1312 into a tongue shape and bending it inward by 90 degrees.

[0161] The central pressing portion 1313 is formed in the center of the connecting portion 130 in the left-right direction, and protrudes from the connecting main portion 131 by a length equal to the width of the base side protruding portion 133 . The side pressing portions 1341 are formed on both left and right ends of the connecting portion 130 , and protrude from the main connecting portion 131 longer than the base side protruding portion 133 and the central pressing portion 1313 . The base side protrusion 133 and the central pressing portion 1313 sandwich the base portion 111 and the cover flange portion 1612 . The distance between the base side protrusion 133 and the central pressing portion 1313 is the sum of the thickness of the base portion 111 and the thickness of the cover flange portion 1612 .

[0162] The base side protrusion 133 and the side pressing portion 1341 sandwich the base portion 111 , the cover flange portion 1612 , and the upper plate of the reinforcing portion 140 . The distance between base side protrusion 133 and side pressing portion 1341 is the sum of the thickness of base portion 111 , the thickness of cover flange 1612 , and the thickness of the metal plate of upper plate 147 of reinforcing portion 140 .

[0163] The side pressing parts 1341 are formed to protrude long inward at both the left and right ends of the connecting part 130. The side pressing parts 1341 overlap with the ends of the upper plate 147 of the reinforcing part 140 to pinch the ends of the upper plate 147 of the reinforcing part 140, and have pressing cutout parts 13411 to avoid the cylindrical hole part 141 protruding from the upper plate 147 of the reinforcing part 140.

[0164] In this embodiment, a cover packing 162 is disposed between the base portion 111 of the heat sink 110 and the cover portion 160 to provide waterproof performance. In this embodiment, in order to fix the base portion 111 of the heat sink 110, the cover gasket 162, and the cover portion 160 at once, the connecting portion 130 has multiple functions, making it possible to fix various parts without increasing the number of parts. Specifically, the cover part 160, the base part 111 of the heat sink 110, and the cover packing 162 are fixed by fastening members such as screws in a manner sandwiched between the base side protruding part 133 which is the lower fixing part of the connecting part 130 and the side pressing part 1341 which is the intermediate fixing part, and the top plate part 113 is fixed to the top plate side protruding part 132 which is the upper fixing part with fastening members such as screws. At this time, a hole through which the screw passes is formed in the base side protruding part 133 which is the lower fixing part, and a screw hole through which the screw can be fastened is provided in the side pressing part 1341 which is the intermediate fixing part. Further, the arm 10 for mounting the lighting fixture on the ceiling can be fixed to the pillar portion 1312 which is the connection portion of the coupling portion 130.

[0165] 5 and 8, fixing portion 139 has a function of fixing a plurality of members. Therefore, there is no need to provide a mounting structure for fixing cover portion 160 to light source portion 150, and cover 161 can be reliably fixed without increasing the number of parts and assembly steps.

[0166] According to the configurations of Figures 5 and 8, by providing fixing portion 139 to connecting portion 130 that connects base portion 111 and top plate portion 113 of heat sink 110, it becomes possible to fix cover 161 while controlling the dimensions without providing a separate member, and assembly becomes easier due to the standardization of parts.

[0167] ●Figures 5 and 20 (Connecting portion 130 with enhanced vibration resistance) As described above, the main function of the connecting portion 130 is to fix the base portion 111 and the top plate portion 113 of the heat sink 110 and to fix the arm 10 .

[0168] On the other hand, if the equipment is to be installed in an environment where it is subject to vibrations, such as from a crane, it is necessary to strengthen the vibration resistance. Generally, vibrations must be considered in the horizontal direction (x-direction, y-direction) and the vertical direction (z-direction). When strengthening vibration resistance, it is necessary to consider improving the rigidity in each of the above x, y, and z directions.

[0169] In order to improve the rigidity, it is necessary to improve the rigidity of the connecting portion 130 in the x, y, and z directions, and to increase the number of fixing points between the base portion 111 and the top plate portion 113 of the heat sink 110 and the connecting portion 130.

[0170] The connecting portion 130 of this embodiment has a shape that enhances strength in the x, y, and z directions. Specifically, as shown in FIG. 5, the connecting portion 130 has the following three orthogonal surfaces: xy plane: base side protrusion 133, top plate side protrusion 132, side pressing portion 1341 yz plane: connecting main part 131 xz plane: a pair of lateral protrusions 134

[0171] The base portion 111 and the top plate portion 113 of the heat sink 110 have substantially the same rectangular shape. The main connection portion 131 of the connection portion 130 is a rectangular plate having sides the same length as the sides of the base portion 111 and the top plate portion 113 .

[0172] The connecting portion 130 has a base-side protruding portion 133 , a top-plate-side protruding portion 132 , and a pair of side protruding portions 134 on the four sides of the connecting main portion 131 . The base-side protruding portion 133 and the top-plate-side protruding portion 132 are formed by bending the top and bottom of the main connecting portion 131 in a 90 degree direction. The lateral protrusions 134 are formed by forming first bent portions on the left and right sides of the main connecting portion 131 and bending them in a 90 degree direction. The side pressing portion 1341 is formed by forming a second bent portion below the side protruding portion 134 and bending it in the 90 degree direction. The side pressing portions 1341 are parallel to the base portion 111 of the heat sink 110 .

[0173] The base side protrusion 133, the top plate side protrusion 132, the side pressing portion 1341, the main connecting portion 131, and the side protrusion 134 are perpendicular to each other, which increases the rigidity in all directions.

[0174] Although not shown, the side of the frame side portion 1314 may be bent 90 degrees to form an xz plane parallel to the lateral protrusion portion 134 .

[0175] In addition, the lower side of lower frame portion 1315 and the upper side of upper frame portion 1316 may be bent 90 degrees to form an xy plane parallel to base-side protruding portion 133 and top-plate-side protruding portion 132 .

[0176] In the xy plane formed by bending the lower side of the frame lower part 1315 and the upper side of the frame upper part 1316, a recess is formed similarly to the upper plate of the reinforcing part 140. In the xy plane formed by bending the lower side of the frame lower portion 1315, an inclined portion is formed similarly to the upper plate of the reinforcing portion 140.

[0177] As shown in Fig. 20, in this embodiment, the main connecting portion 131, which is expanded in the width direction of the connecting portion 130, has a plurality of holes 138 in the pillar portion 1312 and the frame side portion 1314 to reduce weight. The diameter of the holes 138 is made smaller as it approaches the base portion 111, thereby ensuring the strength of the base portion 111 side. In addition, by drilling holes, it is possible to form a shape that does not obstruct the flow of air to the fin portion 112 of the heat sink 110 contained therein, and it is possible to increase the rigidity without affecting the heat dissipation performance.

[0178] According to the configuration of FIG. 5, it is possible to configure a lighting fixture that can withstand vibrations (forces) in different directions without providing reinforcing members corresponding to each of the directions.

[0179] According to the configuration of FIG. 5, since the connecting portion 130 has three-dimensional orthogonal surfaces, it is possible to provide a frame structure for a vibration-resistant device.

[0180] According to the configuration of FIG. 5, it is possible to increase the rigidity against horizontal and vertical vibrations without providing a separate member, and it is possible to improve the vibration resistance performance.

[0181] ●Figures 11 and 12 (Fixture mounting bracket) The lighting fixture of this embodiment is fixed to a ceiling surface by an arm 10 fixed to a connecting portion 130. The arm 10 is formed in a U-shape so as to straddle the lighting fixture 1, and is fixed to two connecting portions 130 with two bolts each. Arm 10 is provided with holes corresponding to the two bolts, with upper hole 12 being a substantially circular hole having a substantially perfect circular shape, and lower hole 13 being an arc-shaped hole having a circular arc shape. By changing the position of the arc-shaped hole of the lower hole 13 with the bolt of the upper hole 12 as an axis, the irradiation direction of the device can be changed.

[0182] The range of change in the irradiation direction is determined by the arc-shaped hole shape of the lower hole 13 of the arm 10, but if an angle is added, there is a risk of interference with the case part 123 or the top plate part 113 mounted on the device relative to the arm 10, so it is common to limit the angle to a certain extent (approximately about 30 degrees). If the angle can be adjusted to about 90 degrees, this can be achieved by lengthening the arm 10, but this will cause the device's center of gravity to be farther away from the ceiling mounting surface, which is disadvantageous in terms of strength, so it becomes necessary to relatively increase the strength of the arm 10.

[0183] On the other hand, the lighting fixture 1 is generally installed on the ceiling. However, in cases where the ceiling is high, the fixture may be installed on a wall and the angle of the lighting fixture may be adjusted to illuminate the light.

[0184] In this case, by using an instrument mounting bracket 200 shown in FIG. 11, even a typical arm 10 (with angle adjustment of about ±30 degrees) can be easily attached to the wall. The appliance mounting bracket 200 in this embodiment has a bracket leg portion 220 which serves as a wall fixing portion to be fixed to a wall surface, and an appliance mounting portion 210 which is formed at a predetermined angle to the wall surface, and the appliance mounting portion 210 has an appliance fixing hole 211 formed along the direction of gravity. The instrument fixing hole 211 has a lateral diameter that decreases toward the direction of gravity.

[0185] The worker loosely fastens the bolt 291 and nut 292 in the mounting hole 11 of the arm 10, inserts the bolt 291 from bottom to top into the wide upper part of the instrument fixing hole 211, and then slides the bolt 291 into the narrow lower part of the instrument fixing hole 211. In this state, the bolt 291 is temporarily hooked into the instrument fixing hole 211 by the instrument's own weight, so the worker can install the instrument with both hands and there is no need to install the instrument while holding down the bolt 291 with one hand, improving workability.

[0186] In addition, since the arm 10 of the lighting fixture 1 is used as is without being replaced with a separate part, the lighting direction can be easily adjusted by using a fixture having a function for adjusting the lighting direction. 11(a) has a wall surface mounting portion and a side surface portion 222 perpendicular to the wall surface mounting portion, and the side surface portion 222 is arranged so as not to overlap the appliance fixing hole 211 of the appliance mounting portion 210 in a side view. This makes it possible to install the bolt 291 in the appliance mounting bracket 200 from the side when mounting an appliance.

[0187] 11(a), the edge of the side portion 222 of the appliance mounting bracket 200 on the appliance mounting portion 210 side is a curved portion 223, which provides a working gap 250 with respect to the appliance mounting portion 210 in side view. The curved portion 223 is spaced 10 mm or more from the appliance mounting portion 210 in side view. The side portion 222 of the instrument mounting bracket 200 in FIG. 11(b) is connected to the instrument mounting portion 210 by a straight portion 224. The length of both the left and right sides of the instrument mounting portion 210 is the same as the length of the straight portion 224 of the side portion 222. The side portion 222 has a horizontally long rectangular window 225 along the straight portion 224. The window 225 provides a working gap 250 for the instrument mounting portion 210 in side view. The window 225 provides a gap 250 of 10 mm or more for the instrument mounting portion 210 in side view. is.

[0188] The presence of gap 250 makes it possible to insert a tool from the side portion 222 of the appliance mounting bracket 200 to the back side of the appliance mounting portion 210 (the side opposite the appliance mounting surface) when fixing an appliance to the appliance mounting portion 210 with bolt 291 and nut 292, making installation easy.

[0189] As shown in FIG. 11, the instrument mounting portion 210 is formed with only the instrument fixing hole 211 through which the mounting bolt 291 passes, but a hole for reducing weight may be provided. As shown in FIG. 11, the instrument attachment portion 210 has no welding or fastening points, and can be manufactured as an integrated part by folding a single sheet metal. When the curved portion 223 of the instrument mounting fitting 200 in FIG. 11(a) is set back significantly, the fitting body portion 230 may be omitted, and the instrument mounting portion 210 may be directly connected to the fitting waist portion 240. The instrument mounting bracket 200 in Figure 11(b) does not have a bracket body portion 230 and a bracket waist portion 240, and therefore is lighter than the instrument mounting bracket 200 in Figure 11(a), and further requires fewer bendings and is easier to manufacture. In addition, the fixture mounting bracket 200 in Figure 11 (b) has the left and right sides of the fixture mounting portion 210 connected to the straight portion 224 of the side portion 222 over their entire length, excluding the window 225, so that it has a sturdy structure and there is little possibility that the inclination angle of the fixture mounting portion 210 will change due to the weight of the lighting fixture.

[0190] 12, the arm 10 is fixed to the lower side of the instrument mounting part 210, but the arm 10 may be fixed to the upper side of the instrument mounting part 210. In this case, the arm 10 to which the bolt 291 and nut 292 are not attached is placed on the upper side of the instrument mounting part 210 of the instrument mounting bracket 200 via the gap 250, and then the bolt 291 and nut 292 are passed through the mounting hole 11 and the instrument fixing hole 211 of the arm 10, and the nut 292 is tightened to fix the arm 10 from the lower side. When the arm 10 is fixed to the upper side of the instrument mounting part 210, it becomes possible to hang the instrument on the instrument mounting bracket 200 before inserting the bolt 291 into the mounting hole 11 of the arm 10, which makes the installation even easier.

[0191] As shown in Fig. 12(b), the appliance mounting bracket 200 can be attached to a mounting surface 900 such as a horizontal ceiling surface, rather than to a vertical wall. The appliance mounting bracket 200 shown in Fig. 12(b) has a smaller lateral diameter on the closer side to the bracket body 230 than the appliance fixing hole 211 in Fig. 11, and the appliance fixing hole 211 has a smaller lateral diameter toward the direction of gravity.

[0192] As shown in FIG. 12(c), the appliance mounting bracket 200 can be attached to a mounting portion 900 such as an inclined wall surface, rather than a vertical wall.

[0193] ●Figure 21 (Cover gasket 162) The cover gasket 162 is disposed on the cover flange 1612 and is sandwiched between the cover flange 1612 and the base portion 111 . As shown in FIG. 21, the cover flange portion 1612 has a horizontal flange portion 16121 and a flange band portion 16122.

[0194] The horizontal flange portion 16121 is a rectangular ring portion that is perpendicular to the side surface of the main cover 1611 and parallel to the lower surface of the main cover 1611. The flange portion 16122 is an annular belt portion that is perpendicular to the flange horizontal portion 16121 , is located around the flange horizontal portion 16121 , and is parallel to the side surface of the main cover 1611 . The cover flange portion 1612 has an inner protrusion portion 1613 , a plurality of protrusions 1614 , and a plurality of recesses 1615 on the inside of the flange horizontal portion 16121 and the flange band portion 16122 .

[0195] The inner protrusion 1613 protrudes inward from the inner surface of the side surface of the main cover 1611 . There are eight inner protrusions 1613 in total, two on each side. The inner protrusion 1613 is L-shaped and is an L-shaped protrusion that protrudes from the inner surface of the cover flange 1612 along the inner surface of the side surface of the main cover 1611. The inner protrusion 1613 has a step 1616 at the upper corner of the L shape. The light source units 150 having a circular outer shape are attached to the eight stepped portions 1616 in total, positioned by the orthogonal walls of the stepped portions 1616 .

[0196] The outer shape of the cover gasket 162 is the same as the outer shape of the flange portion 16122 . The outer periphery of the cover packing 162 is pressed by the upper end face of the flange portion 16122 and the base portion 111, and is deformed thin, so that the thickness of the cover packing 162 becomes a predetermined thickness (a predetermined amount of compression). The cover packing 162 has a plurality of recesses 1622, a plurality of protrusions 1623, and one annular protrusion 1624 on the lower surface.

[0197] The annular protrusion 1624 is a rail-shaped protrusion that goes around the lower surface of the cover packing 162 . The annular protrusion 1624 is deformed by pressure applied by the flange horizontal portion 16121 and the base portion 111, thereby improving the water-stopping effect.

[0198] The recess 1622 of the cover packing 162 fits over the protrusion 1614 of the cover flange 1612 for close contact. The protrusion 1623 of the cover packing 162 is fitted into the recess 1615 of the cover flange 1612 and comes into close contact with it. The cover packing 162 has a lid portion 1621 that protrudes inward in a glans shape. The lid portion 1621 of the cover packing 162 comes into close contact with the inner protrusion 1613 of the cover flange portion 1612 so as to cover it.

[0199] The lid portion 1621 has a step portion 1629 having an orthogonal wall corresponding to the step portion 1616 of the inner convex portion 1613 . The step portion 1629 of the lid portion 1621 has a horizontal wall 1627 and an arcuate wall 1628 . The horizontal wall 1627 is a flat surface that abuts against the lower surface of the outer edge of the light source unit 150 . The arc wall 1628 is an arc-shaped surface that comes into contact with the outer circumferential surface of the light source unit 150 . The eight arc walls 1628 are surfaces having the same radius as the outer periphery radius of the light source unit 150 . The lid portion 1621 is disposed between the light source portion 150 and the cover portion 160, and thus can provide a cushioning function and can protect the light source portion 150 from impact.

[0200] The cover packing 162 has two annular protrusions 1625 on the upper surface. The annular protrusion 1625 is a rail-shaped protrusion that goes around the top surface of the cover packing 162 . Both of the two annular protrusions 1625 are formed inside the screw hole 1626 . The annular protrusion 1625 is deformed by pressure applied by the flange horizontal portion 16121 and the base portion 111, improving the water-stopping effect. There may be one or more annular protrusions.

[0201] The outer shape of the cover gasket 162 may be made the same as the inner shape of the flange portion 16122, and the cover gasket 162 may be hidden inside the flange portion 16122. The cover gasket 162 is not pressurized by the flange portion 16122, but is pressurized by the flange horizontal portion 16121 and the base portion 111 and deformed.

[0202] Embodiment 2 The configuration of lighting device 1 according to embodiment 2 will be described with reference to Figs. 22 to 27. The following describes the differences from the first embodiment.

[0203] ●Figures 22, 23 and 24 (Lighting fixture 1 configuration) As shown in FIGS. 22, 23 and 24, a main connection portion 131 of a connection portion 130 is composed of only the pillar portion 1312 of the first embodiment. A top plate side protrusion 132 and a base side protrusion 133 are formed above and below the column portion 1312 . A central pressing portion 1313 is formed at the bottom of the pillar portion 1312 . The configurations of the top plate side protrusion 132, the base side protrusion 133, and the central pressing portion 1313 are the same as those in the first embodiment.

[0204] The base portion 111 has two pins 1115 for positioning the heat dissipation sheet 171 . The top plate portion 113 has a concave portion 1138 facing the top plate side protruding portion 132 . The concave surface portion 1138 is recessed below the upper surface of the top plate portion 113 and is a flat portion having the same shape as the top plate side protruding portion 132 . The concave surface portion 1138 is recessed below the upper surface of the top plate portion 113, thereby improving the resistance of the top plate portion 113 to deformation.

[0205] As shown in FIG. 24, on the base portion 111, an insulating sheet 172, a heat dissipation sheet 171, a light source substrate 151, and a lens portion 152 are arranged in this order. Illumination device 1 does not have reinforcing portion 140, and base portion 111 is reinforced by bent portion 1111 that is bent into an L shape from base portion 111.

[0206] ●Figures 25 and 26 (Bent portion 1111 of base portion 111) As shown in Figures 25 and 26, the base portion 111 has bent portions 1111 on each side. One bent portion 1111 is disposed on each straight portion of a pair of opposing sides of the base portion 111 . Two bent portions 1111 are disposed on the straight portions of each of another pair of opposing sides of the base portion 111. Between the two bent portions 1111, there is an attachment space 1114 for attaching the connecting portion 130.

[0207] The width of the connecting portion 130 and the width of the mounting space 1114 are the same, and the base side protrusion 133 of the connecting portion 130 passes through the mounting space 1114 and is fixed to the lower surface of the base portion 111 . The height of the bent portion 1111 is the same as the thickness of the cover flange portion 1612 or less than the thickness of the cover flange portion 1612 .

[0208] Although not shown, the bent portion 1131 of the top plate portion 113 may also have a similar configuration to the bent portion 1111 of the base portion 111 in FIGS.

[0209] ●Figures 26 and 27 (Heat dissipation sheet 171 and insulation sheet 172) As shown in FIGS. 26 and 27, the light source substrate 151 has an octagonal or approximately octagonal shape. The heat dissipation sheet 171 has an octagonal or approximately octagonal shape that is larger than the light source substrate 151 . The heat dissipation sheet 171 has tongue portions 1711 with through holes on two sides. The heat dissipation sheet 171 is positioned by passing the pins 1115 of the base portion 111 through the through holes of the tongue portion 1711 . The heat dissipation sheet 171 has wire-passing holes 176 (not shown) on the outer periphery. The wire-passing hole 176 has the same shape as the board hole 153, and the wire-passing packing 116 is inserted into the wire-passing hole 176. This is a hole through which the wire 1221 passes.

[0210] The insulating sheet 172 is ring-shaped. The insulating sheet 172 has a ring-shaped portion 173 and a return portion 174 .

[0211] The annular portion 173 is a ring-shaped flat sheet, and the inner shape of the annular portion 173 shown by the dashed line is an octagon or approximately octagonal shape smaller than the heat dissipation sheet 171, and the outer shape of the annular portion 173 is an octagon or approximately octagonal shape larger than the heat dissipation sheet 171. The annular portion 173 has two pin holes 177 through which the pins 1115 of the base portion 111 pass.

[0212] The return portions 174 are disposed on every other one of the eight sides. The return portion 174 is folded back 180 degrees from the end of the annular portion 173 of the insulating sheet 172 in a U-shape. The return portion 174 folds over the outer edge of the light source substrate 151 while sandwiching the heat dissipation sheet 171 , and covers the side end faces of the heat dissipation sheet 171 and the outer peripheral edge of the light source substrate 151 .

[0213] The return portions 174 are provided at four locations in the cross direction. Since the insulating sheet 172 is flexible, the return portions 174 can be attached so as to fold over the outer edge of the light source substrate 151 while bending the annular portion 173 .

[0214] The insulating sheet 172 has a wiring portion 175 on its inner periphery. The wire portion 175 is a trapezoidal piece formed from the center of the inner side of the annular portion 173 toward the center. The wire-passing portion 175 has a wire-passing hole 176 in the center, which has the same shape as the board hole 153 . The wire-passing hole 176 is a hole into which the wire-passing packing 116 is fitted and through which the wire 1221 passes. As shown in FIG. 27(e), the relationship of the diameters is as follows: Inner diameter of insulating sheet 172<outer diameter of light source substrate 151<outer diameter of heat dissipation sheet 171<outer diameter of insulating sheet 172<outer diameter of base portion 111

[0215] In this embodiment, the insulation properties are improved without increasing the amount of insulating sheet 172 used. Furthermore, by covering with the return portion 174, the insulation distance increases, and the insulation properties improve. The return portion 174 may be provided on one or more sides, or may be provided on all eight sides.

[0216] ●Figure 28 (Modifications of bent portion 1111 of base portion 111) As shown in FIG. 28, a bent portion 1113 may be formed in a mounting space 1114 between two bent portions 1111 . The bent portion 1113 is formed by bending an end of the base portion 111 into a 180 degree U-shape. The bent portion 1113 has a screw hole 1118 in the center, similar to that of the base portion 111, for fixing the base side protrusion portion 133 thereto. Although not shown, some or all of the bent portions 1111 may be bent into a 180 degree U-shape in the same manner as the bent portion 1113 . Although not shown, the top plate portion 113 may also be provided with a bent portion similar to the bent portion 1113 of the base portion 111 in FIG. ●Figure 29 (Wiring through part 119) FIG. 29 shows the wiring through portion 119. The wiring through portion 119 has a convex portion 114 and a packing 116 for passing wiring. The convex portion 114 is raised in a direction opposite to the direction in which the light source substrate 151 is installed from the base portion 111. It has a curved box shape. The convex portion 114 provides a space 1141 between the rear surface of the base portion 111 and the light source substrate 151 . The convex portion 114 has a circular through hole 115 in the center of the rectangular upper surface. The through hole 115 is a hole into which a wire-passing packing 116 is fitted. The wire-passing packing 116 has annular grooves 1161 on the outer periphery at the top and bottom centers. The annular groove 1161 is an annular recess that fits into the through hole 115 . An upper portion of the wire-passing packing 116 above the annular groove 1161 is exposed on the convex portion 114 . The lower part of the wire-passing packing 116 below the annular groove 1161 is housed in the space 1141 .

[0217] Wire-passing packing 116 has wiring holes 117 in the same number as the number of wires 1221, and each wiring hole 117 passes only one wire. Moreover, the inside of the wiring hole 117 is provided with projections and recesses to prevent the infiltration of water and moisture.

[0218] The wire-passing packing 116 has a protrusion 118 . The protruding portion 118 is a portion that protrudes beyond the base portion 111 toward the side where the light source substrate 151 is located. The horizontal cross-sectional shape of the protrusion 118 is the same as or smaller than the substrate hole 153 . The protrusion 118 is inserted into the wire passage hole 176 of the sheet 170 (the heat dissipation sheet 171 and the insulating sheet 172 ) and the board hole 153 of the light source board 151 .

[0219] By configuring the protruding portion 118 to be thicker than the thickness of the light source substrate 151 , the wiring 1221 does not come into contact with the edge of the substrate hole 153 of the light source substrate 151 .

[0220] In this way, by providing a convex portion 114 on the base portion 111 and forming a space 1141 on the back side of the convex portion 114, a gasket 116 for passing wires can be placed on the base portion 111, and the wiring 1221 can be passed through without increasing the outer diameter of the light source substrate 151.

[0221] Although the embodiments of the present invention have been described above, two or more of these embodiments may be combined and implemented. Alternatively, one of these embodiments may be partially implemented. Alternatively, two or more of these embodiments may be partially combined and implemented. Note that the present invention is not limited to these embodiments, and various modifications are possible as necessary. [Explanation of symbols]

[0222] 1 lighting fixture, 10 arm, 11 mounting hole, 12 upper hole, 13 lower hole, 100 light source unit, 110 heat sink, 111 base portion, 1111 bent portion, 1112 light source fixing portion, 1113 bending portion, 1114 mounting space, 1115 pin, 1118, 1119 screw hole, 112 fin portion, 1121 notch, 113 top plate portion, 1131 bending portion, 1132 fin fixing portion, 1138 concave portion, 1139 screw hole, 114 convex portion, 1141 space, 115 through hole, 116 wire passing packing, 1161 annular groove, 117 wiring hole, 118 protrusion, 119 wiring penetration portion, 120 power supply unit, 121 lighting circuit portion, 122 harness, 1221 wiring, 1222 power supply board, 123 case portion, 1231 case body, 12311 main case portion, 12312 step portion, 12313 Case flange, 12314 horizontal ring, 12315 vertical band, 1232 case packing, 12321 annular convex, 12322 annular mountain, 1233 bush, 129 case fixing device, 130 connection part, 131 main connection part, 1311 connection opening, 1312 pillar, 13121 connection hole, 1313 center pressing part, 1314 frame side, 1315 frame bottom, 1 316 upper frame portion, 13131 holding hole portion, 132 top plate side protrusion portion, 133 base side protrusion portion, 134 side protrusion portion, 1341 side holding portion, 13411 holding notch portion, 137 top plate fixing device, 138 hole portion, 139 fixing portion, 140 reinforcing portion, 141 hole tube portion, 142 reinforcing hole portion, 143 inclined portion, 147 upper plate, 1471 upper recess portion, 1472 notch portion, 148 back plate, 149 lower plate, 1481 lower recess portion, 150 light source portion, 151 light source board, 152 lens portion, 153 board hole, 154 board notch portion, 160 cover portion, 1601 main body portion, 1602, 1603 film, 161 cover, 1611 main cover, 1612 cover flange portion, 1613 inner convex portion, 1614 convex portion, 1615 concave portion, 1616 step portion, 16121 flange horizontal portion, 16122 flange band portion, 162 cover packing, 1621 lid portion, 1622 concave portion, 1623 convex portion, 1624 Annular protrusion, 1625 Annular convex portion, 1626 screw hole, 1627 horizontal wall, 1628 arc wall, 1629 step portion, 169 cover fixing device, 170 sheet, 171 heat dissipation sheet, 1711 tongue portion, 172 insulating sheet, 173 annular portion, 174 return portion, 175 wire passing portion, 176 wire passing hole, 177 pin hole, 200 fixture mounting bracket, 210 fixture mounting portion, 211 fixture fixing hole, 220 fixture leg portion, 221 wall mounting portion, 222 side portion, 223 curved portion, 224 straight portion, 225 window, 230 fixture waist portion, 240 fixture waist portion, 241 electric wire hole, 250 gap, 291 bolt, 292 nut, 900 mounting portion, 901 fixture fixing device.

Claims

1. A light source substrate; a base portion on which the light source substrate is disposed; a heat dissipation sheet and an insulating sheet disposed between the light source substrate and the base portion; Equipped with the insulating sheet has a ring-shaped annular portion and a folded portion that is folded back in a U-shape and that is disposed between the heat dissipation sheet and the light source board, The return portion covers a side end surface of the heat dissipation sheet and an outer peripheral end portion of the light source substrate.

2. A light source substrate; a base portion on which the light source substrate is disposed; a heat dissipation sheet and an insulating sheet disposed between the light source substrate and the base portion; Equipped with The insulating sheet has a ring-shaped annular portion and a folded portion folded back from an end portion, The return portion covers a side end surface of the heat dissipation sheet and an outer peripheral end portion of the light source substrate.

3. A light source substrate; a base portion on which the light source substrate is disposed; a heat dissipation sheet and an insulating sheet disposed between the light source substrate and the base portion; Equipped with The insulating sheet has a ring-shaped portion and a folded portion, the annular portion is a ring-shaped flat sheet disposed between the base portion and the heat dissipation sheet, The bent portion is bent from an end of the annular portion on the outer side of the heat dissipation sheet, The bent portion covers a side end surface of the heat dissipation sheet and an outer peripheral end portion of the light source substrate.

4. A light source substrate; a base portion on which the light source substrate is disposed; a heat dissipation sheet and an insulating sheet disposed between the light source substrate and the base portion; Equipped with the insulating sheet has a ring-shaped annular portion and a folded portion folded back from an end of the annular portion in a direction from the base portion to the light source substrate, The return portion covers a side end surface of the heat dissipation sheet and an outer peripheral end portion of the light source substrate.

5. The diameters of the light source substrate, the heat dissipation sheet, and the insulation sheet are Inner diameter of insulation sheet < outer diameter of light source board < outer diameter of heat dissipation sheet < outer diameter of insulation sheet The lighting fixture according to claim 1 , wherein the following relationship is satisfied:

Images