JP2017174675A - Illumination tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an illumination tool in which heat releasing property of a power supplying part may be improved.SOLUTION: An illumination tool 10 comprises an emission module 11, a heat releaser 16, a main body chassis 17, a power supplying part 13 and an arm 14. The emission module 11 comprises light emission element 21. The heat releaser 16 comprises a light source attachment part 26 on whose lower surface, the emission module 11 is arranged, and a plurality of heat releasing fins 27 aligned in predetermined fin arranging direction f and projecting from upper surface of the light source attachment part 26. The main body chassis 17 comprises a power supply attachment part 36 arranged above the heat releaser 16 with an interposed space, a supporting part 37 supporting the heat releaser 16 and notched parts 39 arranged on both edges in a corresponding direction to the fin alignment direction f of the power supply attachment part 36. The power supplying part 13 is arranged on the power supply attachment part 36. The arm 14 comprises an establishment part 49 arranged above the power supplying part 13 with an interposed space and a pair of side part 50 which are arranged on both ends of the establishment part 49 and connected to the main body chassis 17 on upper side of the notched part 39.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to a lighting fixture using a light emitting module.

  2. Description of the Related Art Conventionally, for example, there is a lighting device for a high ceiling used for illumination of a space with a high ceiling such as a facility. In this lighting fixture, a light emitting module having a light emitting element is used, and the light emitting module is attached to the lower surface of the radiator. A plurality of radiating fins for radiating the heat generated by the light emitting elements are projected on the upper surface of the radiator. The radiator is supported by a main body chassis disposed above the heat radiator, and a power supply unit is disposed on the main body chassis. An arm for installation on the ceiling or the like is connected to the main chassis.

  When lighting fixtures are lit, the heat generated by the light-emitting element is effectively dissipated by a radiator having a plurality of heat-dissipating fins to suppress the temperature rise of the light-emitting element, but the power supply that supplies power to the light-emitting module Since the part also generates heat, it is preferable to effectively dissipate the heat of the power supply part and suppress the temperature rise of the power supply part.

JP 2013-201080 A

  The problem to be solved by the present invention is to provide a lighting fixture capable of improving the heat dissipation of the power supply unit.

  The lighting fixture of the embodiment includes a light emitting module, a radiator, a main body chassis, a power supply unit, and an arm. The light emitting module has a light emitting element. The radiator includes a light source mounting portion on which a light emitting module is disposed on a lower surface, and a plurality of heat radiation fins that protrude in a predetermined fin juxtaposition direction from the upper surface of the light source mounting portion. The main chassis is provided with a power supply mounting part disposed above the heatsink, a support part for supporting the heatsink, and notches provided on both side edges in the direction corresponding to the fin juxtaposition direction of the power supply part. Part. The power supply unit is disposed above the power supply mounting unit. The arm has an installation part disposed with a space above the power supply part, and a pair of side parts provided at both ends of the installation part and connected to the main body chassis above the notch part.

  According to the present invention, it can be expected that the heat dissipation of the power supply unit is improved.

It is a disassembled perspective view seen from the lower side of the lighting fixture which shows one Embodiment. It is a perspective view seen from the lower side of a lighting fixture same as the above. It is a perspective view seen from the upper side of a lighting fixture same as the above. It is sectional drawing of a lighting fixture same as the above. It is a top view of a lighting fixture same as the above.

  Hereinafter, an embodiment will be described with reference to FIGS. 1 to 5.

  The lighting fixture 10 is, for example, a high ceiling lighting fixture used for lighting in a space with a high ceiling such as a facility.

  The luminaire 10 includes a light emitting module 11, an instrument main body 12 on which the light emitting module 11 is disposed, a power supply unit 13 disposed on the instrument main body 12, an arm 14 for supporting the instrument main body 12, and a lower surface of the instrument main body 12. And a cover body 15 covering the peripheral surface. The appliance main body 12 includes a radiator 16 in which the light emitting module 11 is disposed, and a main chassis 17 that supports the radiator 16.

  The light emitting module 11 includes a substrate 20 and a plurality of light emitting elements 21 mounted on one surface of the substrate 20 (a part of the light emitting elements 21 is shown in the figure, and the others are not shown) doing.). The substrate 20 is formed, for example, in a circular shape, and a pattern for mounting the light emitting element 21 is provided on one surface. The substrate 20 is attached to the lower surface of the radiator 16 by a plurality of screws 23 so that the other surface of the substrate 20 is in close contact with the lower surface of the radiator 16 via an insulating heat dissipation sheet 22. For example, a surface-mounted LED is used as the light-emitting element 21 and is mounted in a predetermined arrangement on a pattern on one surface of the substrate 20. The light emitting element 21 is not limited to the LED, and other light emitting elements such as an organic EL may be used. A wiring hole 24 is formed in the center of the substrate 20.

  In addition, the instrument main body 12 has a quadrangular shape in plan view (bottom view), and the instrument appearance is formed in a square shape. That is, the radiator 16 and the main body chassis 17 of the instrument main body 12 have a quadrangular shape in plan view (bottom view) and a quadrangular appearance. In the present embodiment, the shape in plan view (bottom view) is rectangular, the dimension W1 in the longitudinal direction F1 of the instrument body 12 is longer than the dimension W2 in the lateral direction F2, and the instrument appearance is formed in a rectangular parallelepiped shape. ing. That is, the radiator 16 and the body chassis 17 of the instrument body 12 are each rectangular in a plan view (bottom view), and the dimension W1 in the longitudinal direction F1 is longer than the dimension W2 in the lateral direction F2, Each appearance is formed in a rectangular parallelepiped shape.

  The radiator 16 of the appliance main body 12 includes a rectangular and flat light source mounting part 26 and a plurality of heat radiation fins 27 protruding from the upper surface of the light source mounting part 26. The radiator 16 is made of a metal material such as aluminum. The light source mounting portion 26 and the heat radiating fins 27 may be separated from each other, and the heat radiating fins 27 may be inserted into and fixed to a plurality of slits provided on the upper surface of the light source mounting portion 26. 27 may be integrally formed, for example, by extrusion.

  The radiating fins 27 are provided in parallel to each other along a predetermined fin juxtaposition direction f along the short side direction F2 of the rectangular light source mounting portion 26. The distance S1 between the heat radiation fins 27 adjacent to each other in the vicinity of the center portion of the light source mounting portion 26 is the distance between the heat radiation fins 27 adjacent to each other in the vicinity of both end portions around the center portion of the light source mounting portion 26. It is wider than S2. That is, between the radiating fins 27 adjacent to each other in the vicinity of the central portion of the light source mounting portion 26, an enlarged gap portion having an interval S1 wider than the interval S2 between the radiating fins 27 adjacent to each other in the vicinity of the end portion of the light source mounting portion 26. 28 is provided.

  Corresponding to the position of the enlarged gap portion 28, the light source attachment portion 26 is provided with a wiring hole 29 that connects the lower surface side of the light source attachment portion 26 and the enlarged gap portion 28 on the upper surface side. A power feeding cable 30 that is a wiring for electrically connecting the light emitting module 11 and the power supply unit 13 is inserted through the wiring hole 29.

  Corresponding to the position of the enlarged gap portion 28, the protruding fin 31 protrudes from the upper surface of the light source mounting portion 26. The protruding fins 31 are separate from the light source mounting part 26 and are fixed to the upper surface of the light source mounting part 26, for example. The projecting fins 31 may be fixed by screws or by inserting the projecting fins 31 into the slits provided on the upper surface of the light source mounting portion 26 in the same manner as the heat radiation fins 27. The projecting fins 31 may be integrally formed with the light source mounting portion 26 and the heat radiating fins 27 by, for example, extrusion molding.

  The projecting fins 31 are arranged in parallel with the heat radiating fins 27 and have a width corresponding to the longitudinal direction F1 of the heat radiator 16 that is the same width as that of the heat radiating fins 27 and protrudes greatly above the heat radiating fins 27. On the upper end side of the protruding fin 31 protruding above the heat radiating fin 27, a wiring holding portion 32 for holding the power feeding cable 30 is provided. The wiring holding part 32 is a hole, for example, and holds the power supply cable 30 with a fastener passed through the hole.

  Further, the body chassis 17 of the instrument body 12 is bent downward from both sides of the power supply mounting portion 36 and the power supply mounting portion 36 disposed so as to face each other with a space 35 above the radiator 16. A pair of support portions 37 connected to the radiator 16 is provided. The main body chassis 17 is integrally formed of, for example, a metal plate.

  The power supply attachment part 36 is formed in a rectangular shape substantially the same shape as the light source attachment part 26 of the radiator 16. An edge portion 38 that is bent downward is formed in the periphery of the power supply attachment portion 36. A notch 39 is formed at the center of both side edges of the power supply mounting portion 36 in the direction corresponding to the short direction F2 of the main body chassis 17 (the fin juxtaposition direction f of the radiator 16). The cutout portion 39 is parallel to the side edge of the power supply attachment portion 36 and is cut out from the edge portion 38 to a position entering the center side of the power supply attachment portion 36 from the side edge of the power supply attachment portion 36.

  The support portion 37 is bent downward from both sides in the short side direction F2 of the power supply mounting portion 36 (the fin juxtaposition direction f of the radiator 16), and is formed in a frame shape in which a ventilation opening 40 is formed inside. ing. The ventilation opening 40 of the support portion 37 is communicated with the cutout portion 39 of the power supply attachment portion 36. The lower end side of the support portion 37 is connected and fixed to both sides of the radiator 16 in the short direction F2 (the fin juxtaposition direction f of the radiator 16) by screwing.

  The power supply unit 13 is attached to the upper side of the power supply attachment unit 36 of the main body chassis 17. The power supply unit 13 includes a power supply box 43 attached to the upper side of the power supply attachment part 36, and a power supply circuit 44 accommodated in the power supply box 43. The power supply unit 13 (power supply box 43) has a rectangular shape in plan view (bottom view) in accordance with the shape of the instrument body 12, and has an outer shape formed in a rectangular parallelepiped shape in accordance with the instrument appearance of the instrument body 12. Yes.

  The power supply box 43 is formed in a rectangular box shape whose upper surface and peripheral surface are closed and whose lower surface is opened. The power supply box 43 is formed of, for example, a metal plate. Further, the power supply box 43 includes a terminal block box 45 provided on the upper side of the power supply box 43. In the terminal block box 45, terminal blocks (not shown) for AC power input and dimming signal input are respectively arranged.

  The power supply circuit 44 includes a power supply board 46 and electronic components (not shown) mounted on the power supply board 46. The power supply unit 13 includes two power supply boards 46, and these power supply boards 46 are arranged in a direction corresponding to the short direction F2 of the instrument main body 12 in the power supply box 43 (the fin juxtaposition direction f of the radiator 16). They are arranged at both side positions. Further, these power supply boards 46 face the main board surface 46a in parallel with the side surfaces of the power supply box 43 in the direction corresponding to the short direction F2 of the instrument body 12 (the fin juxtaposition direction f of the radiator 16). The power supply box 43 is disposed in the vertical direction and in the vicinity of the side surface thereof.

  The power supply unit 13 (power supply circuit 44) receives AC power, converts the AC power into a predetermined DC power, supplies the power to the light emitting element 21 of the light emitting module 11, and turns on the light emitting element 21. Further, the power supply unit 13 (power supply circuit 44) inputs a dimming signal and performs dimming control of the light emitting element 21 in accordance with the dimming signal.

  In addition, the arm 14 includes an installation portion 49 disposed so as to face the power supply portion 13 with a predetermined space 48 therebetween, and a pair of side portions 50 bent downward from both ends of the installation portion 49. It has. The pair of side portions 50 are connected to both sides of the main body chassis 17 of the instrument main body 12 in the short direction F2 (fin arrangement direction f of the radiator 16). The arm 14 is integrally formed of, for example, a metal plate.

  The front ends of the side portions 50 are connected to the main body chassis 17 via the connection fittings 51. The connection fitting 51 includes a fixing portion 52 that is fixed to the lower surface of the power supply attachment portion 36 of the main body chassis 17 by, for example, screwing, and a connection portion 53 that is bent upward from the fixing portion 52. The width of the connecting portion 53 is smaller than the width of the notched portion 39 of the power supply attaching portion 36, and the connecting portion 53 is fitted into the notched portion 39. The width of the fixing portion 52 is wider than the width of the notch portion 39 of the power supply mounting portion 36, and both sides in the width direction of the fixing portion 52 are configured to be caught by the edge portion 38 of the power supply mounting portion 36. The outer surface side of the connecting portion 53 is located in the region of the cutout portion 39 of the power supply mounting portion 36, that is, disposed at a position that enters the center side of the power supply mounting portion 36 from the side edge of the power supply mounting portion 36. Has been.

  The side portion 50 of the arm 14 is disposed on the outer surface side of the connecting portion 53 of the connecting metal 51, and the connecting portion 53 and the side portion 50 are rotatably connected by the connecting tool 54. The side portion 50 is formed with an arc-shaped angle adjusting groove 55 centered on the connecting tool 54, and the angle adjusting groove 55 is inserted with a fastening tool 56 for tightening and holding the connecting portion 53 and the side portion 50. ing. The angle of the light irradiation direction of the lighting fixture 10 can be adjusted with respect to the arm 14 installed on the ceiling or the like so as to be a predetermined direction such as a direct downward direction.

  In the state where the arm 14 is connected to the instrument body 12, the power supply board 46 in the power supply box 43 has a board surface 46a parallel to the side part 50 of the arm 14 and in the vicinity of the side part 50 of the arm 14. It is arranged.

  The cover body 15 includes a front cover portion 59 that covers the front side of the instrument main body 12 and a cylindrical peripheral surface cover portion 60 that covers the periphery of the instrument main body 12.

  The front cover portion 59 is formed in an annular shape with a circular opening 61 formed in the center. The opening 61 is opposed to the region of the substrate 20 on which the light emitting element 21 of the light emitting module 11 is mounted. The front cover portion 59 is formed with a reflection surface 62 that is inclined to expand downward from the central opening 61 to the periphery. An attachment portion 64 that is attached to the peripheral surface cover portion 60 with a plurality of screws 63 is formed on the periphery of the front cover portion 59. The front cover portion 59 has a function of a reflecting plate that reflects light from the light emitting module 11 in a predetermined light irradiation direction by the reflecting surface 62.

  The peripheral surface cover portion 60 is formed in a cylindrical shape that opens in the vertical direction, and a lower mounting edge (not shown) for fixing the front cover portion 59 with a screw 63 is provided on the lower side, and on the upper side. Is provided with an upper mounting edge 65 attached to the instrument body 12 by, for example, screwing.

  A ventilation path 66 is formed between the inner surface of the peripheral surface cover portion 60 and the side surface around the instrument body 12. A lower air vent 67 communicates with the lower side of the air passage 66, and an upper air vent 68 communicates with the upper side.

  The lower vent 67 is constituted by a plurality of vents 69 provided in the front cover part 59. The plurality of air holes 69 are each provided in a slit shape along the circumferential direction of the front cover portion 59 (reflection surface 62). The lower vent 67 is preferably opposed to the lower side of the radiator 16. The lower vent 67 is not limited to the plurality of vents 69 provided in a slit shape along the circumferential direction of the front cover part 59 (reflecting surface 62), and for example, the inner diameter of the opening 61 is increased. It may be provided between the transparent cover 70 described later.

  The upper vent 68 is configured by an opening between the upper end side (upper attachment edge 65) of the peripheral cover portion 60 and the side surface of the instrument main body 12. The opening area of the lower vent 67 (total opening area) and the opening area of the upper vent 68 (total opening area) are such that the opening area of the lower vent 67 is smaller than the opening area of the upper vent 68. There is a relationship.

  Furthermore, since the periphery of the rectangular instrument body 12 is covered with the cylindrical peripheral surface cover part 60, the ventilation path 66 between the instrument main body 12 and the peripheral surface cover part 60 in the longitudinal direction F1 of the instrument main body 12 is provided. The opening area of the air passage 66 between the instrument main body 12 and the peripheral surface cover portion 60 in the short direction F2 of the instrument main body 12 is larger than the opening area.

  In addition, a translucent cover 70 that covers the light emitting module 11 is disposed in the opening 61 of the front cover portion 59. The translucent cover 70 includes a disk-shaped lower surface portion 71, a peripheral surface portion 72 rising from the periphery of the lower surface portion 71, and a flange portion 73 protruding from the upper end of the peripheral surface portion 72 in the outer diameter direction. The flange portion 73 is brought into contact with the substrate 20 of the light emitting module 11 and is fastened and fixed to the radiator 16 by a plurality of screws. The lower surface of the translucent cover 70 in the assembled state of the lighting fixture 10 is set at the same position as the lower surface of the cover body 15. The translucent cover 70 may be a clear cover with good light transmissivity or a diffusion cover that diffuses light. The translucent cover 70 closes the one surface side where the light emitting element 21 of the light emitting module 11 is mounted, and prevents insects and dust from entering.

  And the lighting fixture 10 comprised in this way installs the installation part 49 of the arm 14 on a ceiling etc., and installs it. When the ceiling is tilted, the arm 14 is also tilted, but by adjusting the angle of the fixture body 12 with respect to this arm 14, the light irradiation direction from the lighting fixture 10 is set, for example, directly below can do.

  The power source unit 13 converts AC power into predetermined DC power and supplies it to the light emitting element 21 of the light emitting module 11 so that the light emitting element 21 of the light emitting module 11 is turned on.

  Light from the light-emitting element 21 that is lit passes through the light-transmitting cover 70 and is irradiated onto the illumination space. A part of the light transmitted through the translucent cover 70 is reflected by the reflecting surface 62 and irradiated to the illumination space.

  Further, the heat generated by the light emitting element 21 at the time of lighting is mainly transmitted from the substrate 20 to the radiator 16 and radiated from the plurality of radiation fins 27 of the radiator 16 into the air.

  When the temperature of the radiator 16 rises, natural convection occurs around the radiator 16. Due to this natural convection, air of relatively low temperature around the lighting fixture 10 flows from the lower vent 67 into the air passage 66 inside the cover body 15, and the inflowed air is dissipated from the radiator 16. Warmed and warmed air is exhausted from the upper vent 68 above the cover body 15.

  At this time, if the opening area of the lower vent 67 and the opening area of the upper vent 68 are the same, or if the opening area of the upper vent 68 is smaller than the opening area of the lower vent 67, the cover Heat tends to accumulate inside the body 15 and the heat dissipation effect tends to be low. On the other hand, in the present embodiment, the opening area of the lower vent 67 is smaller than the opening area of the upper vent 68, so the flow rate of air flowing from the lower vent 67 into the vent path 66 is high. Thus, air with a high flow velocity acts on the radiator 16 and the heat dissipation effect by the radiator 16 is enhanced. This is because the volume of air flowing in from the upper vent 68 and the volume of air discharged from the upper vent 68 are the same, so the opening area of the lower vent 67 is larger than the opening area of the upper vent 68. If it is smaller, it is because the flow velocity of the air flowing from the lower vent 67 into the vent 66 becomes faster.

  Furthermore, since the periphery of the rectangular instrument body 12 is covered with the cylindrical peripheral surface cover part 60, the ventilation path 66 between the instrument main body 12 and the peripheral surface cover part 60 in the longitudinal direction F1 of the instrument main body 12 is provided. The opening area of the air passage 66 between the instrument body 12 and the peripheral surface cover portion 60 in the short direction F2 of the instrument body 12 is larger than the opening area.

  Therefore, since the opening area is small in the ventilation path 66 between the instrument body 12 and the peripheral surface cover portion 60 in the longitudinal direction F1 of the instrument body 12, the flow velocity of the air flowing through the ventilation path 66 is relatively fast, and the radiator 16 is effectively cooled, and a plurality of heat radiation fins 27 are provided along the longitudinal direction F1 of the instrument body 12. The heat dissipation effect is further improved.

  In the ventilation path 66 between the instrument main body 12 and the peripheral surface cover portion 60 in the short direction F2 of the instrument main body 12, since the opening area is large, both sides of the air flowing through the ventilation path 66 are relatively slow. The capacity is large, and the side portion 50 of the arm 14 is reliably cooled. The power source unit 13 is disposed inside the side portion 50 of the arm 14 and the power source unit 13 also generates heat during operation. Therefore, heat from the power source unit 13 is easily transmitted to the side unit 50 of the arm 14. Therefore, when the side portion 50 of the arm 14 is reliably cooled, the heat of the power supply unit 13 is easily transmitted to the side portion 50 of the arm 14, and the heat of the power supply unit 13 is efficiently radiated.

  Further, due to the temperature rise of the radiator 16, natural convection occurs from the lower side to the upper side of the instrument body 12. Due to this natural convection, convection air flows between the radiator 16 and the main body chassis 17 from a direction parallel to the radiating fin 27 (a direction perpendicular to the fin juxtaposition direction f). The ventilation opening 40 of the main body chassis 17 in the direction perpendicular to the heat radiating fins 27 (fin juxtaposition direction f) rises to the lower surface side of the power supply mounting portion 36 of the main body chassis 17 located above the radiator 16. Easy to flow upward from

  At this time, since the notch portions 39 are provided on both side edges of the power supply mounting portion 36 in the direction corresponding to the fin juxtaposition direction f of the radiator 16, the power supply mounting portion 36 of the main body chassis 17 is raised to the lower surface side. Air concentrates from the notch 39 and tends to flow upward. Since the side portion 50 of the arm 14 connected to the instrument main body 12 (main body chassis 17) is located above the cutout portion 39, the air flowing upward from the cutout portion 39 flows into the side portion 50 of the arm 14. It becomes easy to flow along the outer surface. The power source unit 13 is disposed inside the side portion 50 of the arm 14 and the power source unit 13 also generates heat during operation. Therefore, heat from the power source unit 13 is easily transmitted to the side unit 50 of the arm 14. Therefore, since the side part 50 of the arm 14 is cooled by the air flowing along the outer side surface of the side part 50 of the arm 14 from the notch part 39, the heat of the power supply part 13 is easily transmitted to the side part 50 of the arm 14, The heat of the power supply unit 13 is efficiently radiated.

  And according to the lighting fixture 10 of the present embodiment, since the fixture exterior of the fixture body 12 covers the periphery of the square shape with the cylindrical cover body 15, even if the fixture exterior of the fixture body 12 is rectangular, The directionality at the time of installation can be eliminated and the installation can be improved.

  That is, when a plurality of lighting fixtures 10 are installed side by side on the ceiling, the orientation of the appliance main body 12 having a rectangular appearance is not visible because the cylindrical cover body 15 does not show the orientation of the instrument main body 12 having a square appearance. Even if it is disjoint, the plurality of lighting fixtures 10 do not cause a sense of incongruity. Further, when the lighting fixture 10 is installed in the vicinity of the wall surface, since the orientation of the fixture main body 12 having a rectangular appearance cannot be seen by the cylindrical cover body 15, one side of the rectangular shape of the lighting fixture 10 with respect to the wall surface There is no sense of incongruity even if it is not parallel but oblique. Furthermore, since the opening 61 of the cover body 15 is circular, the light and shadow projected on the wall surface are not projected obliquely, and there is no sense of incongruity.

  In addition, since the opening area of the lower vent 67 is smaller than the opening area of the upper vent 68, the flow rate of air flowing from the lower vent 67 into the ventilation path 66 is increased, and the air having a higher flow velocity is the heat sink 16. The heat radiation effect by the heat radiator 16 can be enhanced.

  In this case, if the lower vent 67 is opposed to the lower side of the radiator 16, air having a high flow rate can easily act on the radiator 16, and the heat dissipation effect can be further enhanced.

  Further, since the periphery of the rectangular instrument body 12 is covered with the cylindrical peripheral surface cover portion 60, the ventilation path 66 between the instrument main body 12 and the peripheral surface cover portion 60 in the longitudinal direction F1 of the instrument main body 12 is used. The opening area is reduced, the flow rate of the air flowing through the ventilation path 66 is relatively fast, and the radiator 16 can be effectively cooled. In addition, since a plurality of heat radiation fins 27 are provided along the longitudinal direction F1 of the instrument body 12, air having a relatively high flow velocity flowing through the air passage 66 flows between the heat radiation fins 27, thereby further improving the heat radiation effect. it can.

  In the ventilation path 66 between the instrument main body 12 and the peripheral surface cover part 60 in the short direction F2 of the instrument main body 12, the opening area is large, and the volume of the air flowing through this ventilation path 66 is large, and the side portion of the arm 14 50 can be reliably cooled, and the heat dissipation of the power supply unit 13 can be improved through the side portion 50 of the arm 14.

  Further, the front cover part 59 of the cover body 15 is provided with a reflective surface 62 that expands and inclines downward from the central opening 61 to the peripheral part, and the translucent cover 70 is arranged inside the reflective surface 62. In other words, since the front cover 59 is recessed and the translucent cover 70 is disposed there, the translucent cover 70 is prevented from protruding from the lower surface of the luminaire 10, and the luminaire 10 appearance can be improved. In addition, by providing the inclined reflecting surface 62, the illuminance in the direct downward direction can be increased.

  Further, the distance S1 between the heat radiation fins 27 adjacent to each other in the vicinity of the central portion of the light source mounting portion 26 of the radiator 16 is adjacent to each other in the vicinity of both end portions around the central portion of the light source mounting portion 26. It is formed wider than the interval S2 between the heat radiation fins 27. That is, between the radiating fins 27 adjacent to each other in the vicinity of the central portion of the light source mounting portion 26, an enlarged gap portion having an interval S1 wider than the interval S2 between the radiating fins 27 adjacent to each other in the vicinity of the end portion of the light source mounting portion 26. 28 is provided. By providing the enlarged gap portion 28, the radiator 16 can be effectively used.

  For example, corresponding to the position of the enlarged gap portion 28, the light source module 26 and the power source 11 can be connected to the light source module 26 by providing the light source attachment portion 26 with the wiring hole 29 that connects the lower surface side of the light source attachment portion 26 and the enlarged gap portion 28 on the upper surface side. The feeding cable 30 that electrically connects the section 13 can be easily inserted.

  Furthermore, by providing a protruding fin 31 that protrudes larger than the heat radiating fin 27 from the upper surface of the light source mounting portion 26 in correspondence with the position of the enlarged gap portion 28, the middle of the feeding cable 30 is connected to the upper end side of the protruding fin 31. It is possible to prevent the tension from being applied to the electrical connection portion of the power feeding cable 30 and to dissipate heat from the projecting fins 31. Therefore, the protruding fin 31 has both a heat dissipation function and a cable holding function, and can simplify the configuration.

  Further, the main body chassis 17 is provided with notches 39 on both side edges in the direction corresponding to the fin juxtaposition direction f of the power supply mounting portion 36, and the side portion 50 of the arm 14 is disposed above the notch 39. As a result, air rising to the lower surface side of the power supply mounting portion 36 of the main body chassis 17 concentrates from the cutout portion 39 and flows upward, and the side portion 50 of the arm 14 above the cutout portion 39 can be cooled. The heat is transferred to the side portion 50 of the arm 14, and the heat of the power source portion 13 can be efficiently dissipated.

  Further, in the power supply box 43 of the power supply unit 13, the substrate surface 46 a is parallel to the side part 50 of the arm 14 and the power supply board 46 is disposed in the vicinity of the side part 50 of the arm 14. The heat generated by the power supply component mounted on 46 is efficiently transmitted to the side portion 50 of the arm 14, and the temperature rise of the power supply component can be suppressed.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

10 Lighting equipment
11 Light emitting module
13 Power supply
14 arm
16 radiator
17 Chassis
21 Light emitting element
26 Light source mounting part
27 Radiation fin
36 Power supply mounting section
37 Support section
39 Notch
43 Power box
46 Power supply board
46a Board side
49 Installation section
50 Side f Fin parallel direction

Claims (2)

A light emitting module having a light emitting element;
A light source mounting portion for disposing the light emitting module on the lower surface, and a radiator having a plurality of heat radiating fins juxtaposed in a predetermined fin juxtaposition direction from the upper surface of the light source mounting portion;
A power supply mounting part disposed with a space above the radiator, a support part for supporting the heatsink, and notches provided on both side edges of the power supply mounting part in a direction corresponding to the fin juxtaposition direction A body chassis having a portion;
A power supply unit disposed above the power supply mounting unit;
An installation unit disposed with a space above the power supply unit, and an arm having a pair of side units provided at both ends of the installation unit and connected to the main body chassis above the notch unit;
The lighting fixture characterized by comprising. The power supply unit has a power supply box and a power supply board accommodated in the power supply box,
The lighting apparatus according to claim 1, wherein the power supply substrate in the power supply box has a substrate surface parallel to the side portion of the arm and in the vicinity of the side portion of the arm. .

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