JP2015170442A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device which secures the ability of radiating heat generated by a light emitting module and a power supply circuit and enables downsizing.SOLUTION: A lighting device 10 includes: a light emitting module 42; a power supply circuit 51; and a housing 12. The power supply circuit 51 provides power supply to the light emitting module 42. The housing 12 includes: a body part 26 in which the light emitting module 42 is disposed on a lower surface, the body part 26 storing the power supply circuit 51 therein; and multiple heat radiation fins 27 integrally protruding from an outer peripheral surface of the body part 26.

Description

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

  Conventionally, for example, in stores and the like, pendant-type lighting fixtures that are suspended from the ceiling are used. Also in such a lighting fixture, the light emitting module which has LED as a light source has been used.

  Such a lighting fixture has a structure in which a cylindrical power supply case suspended from the ceiling and a cylindrical light source case are connected to the lower side of the power supply case, and the light source case includes a light emitting module. Is arranged, and a power supply circuit for supplying power to the light emitting module is arranged in the power supply casing.

JP 7-249309 A

  If an attempt is made to simply reduce the size of a lighting fixture having a conventional structure, there is a risk that the heat dissipation of the heat generated by the light emitting module and the power supply circuit cannot be secured.

  The problem to be solved by the present invention is to provide a luminaire that can ensure heat dissipation of heat generated by the light emitting module and the power supply circuit and can be miniaturized.

  The lighting fixture of embodiment has a light emitting module, a power supply circuit, and a housing | casing. The power supply circuit supplies power to the light emitting module. The housing has a light emitting module disposed on the lower surface and a main body that houses the power supply circuit therein, and a plurality of heat radiation fins that integrally protrude from the outer peripheral surface of the main body.

  According to the present invention, since a case in which a plurality of heat radiation fins are integrally provided is used and the light emitting module and the power supply circuit are arranged in this case, heat dissipation of heat generated by the light emitting module and the power supply circuit is ensured. At the same time, it can be expected to become smaller.

It is sectional drawing of the lighting fixture which shows one Embodiment. It is a perspective view of a lighting fixture same as the above. It is a perspective view of the housing | casing of a lighting fixture same as the above. It is a perspective view of the housing | casing of a lighting fixture same as the above. It is a perspective view of the heat-shielding board and power supply circuit of a lighting fixture same as the above. It is sectional drawing which directly attached the lighting fixture same as the above to the ceiling.

  Hereinafter, an embodiment will be described with reference to FIGS. 1 to 6.

  FIG. 1 and FIG. 2 show a so-called pendant lighting fixture 10 that is suspended from the ceiling. The lighting fixture 10 includes a top plate 11, a housing 12, a light source unit 13, a power supply unit 14, a reflecting mirror 15, and the like.

  The top plate 11 is made of metal and has a disk shape. A connecting hole 21 to which a chain 20 suspended from the ceiling is connected is formed at the center of the top plate 11. Further, the top plate 11 is formed with a drawing hole 22 for drawing a power cable wired from the ceiling into the housing 12, and a mounting hole 23 used for other attachments.

  The housing 12 is integrally formed of a metal such as aluminum die casting. The housing 12 includes a main body part 26, a plurality of heat radiation fins 27, an outer cylinder part 28, and the like.

  The main body portion 26 has a cylindrical inner cylinder portion 29 and a bottom plate portion 30 that is disposed at a position closer to the lower portion in the middle of the inner cylinder portion 29 in the vertical direction. A storage space 31 that opens upward and stores the power supply unit 14 is formed on the upper side in the main body portion 26. A cylindrical tube portion 32 projects from the bottom surface of the bottom plate portion 30 toward the center side of the inner tube portion 29. The lower end of the cylindrical portion 32 protrudes below the inner cylindrical portion 29. A light source unit 13 is disposed in the cylindrical portion 32. A wiring hole is formed in the bottom plate portion 30 inside the cylindrical portion 32. Then, the upper part of the main body 26 is combined with the top plate 11 and fixed.

  The heat radiating fins 27 protrude radially from the outer peripheral surface of the housing 12, that is, the outer peripheral surface of the inner cylindrical portion 29. The upper end of the radiating fin 27 is positioned below the main body portion 26, and the lower end of the radiating fin 27 is set at the same position as the main body portion 26. On the lower surface of the bottom plate portion 30, the radiation fins 27 are also formed radially between the inner cylinder portion 29 and the cylinder portion 32 so as to be continuous with the radiation fins 27 protruding from the outer peripheral surface of the inner cylinder portion 29.

  The outer cylinder portion 28 is cylindrical, and is disposed around the main body portion 26 with a space between the outer peripheral surface of the main body portion 26 and integrally formed at the outer diameter side tips of the plurality of radiating fins 27. Yes. The upper end of the outer cylinder part 28 is located below the main body part 26 and above the heat dissipating fins 27, and the lower end of the outer cylinder part 28 is located above the main body part 26 and the heat dissipating fins 27.

  A ventilation path 33 communicating in the vertical direction is formed between the inner cylinder part 29, the outer cylinder part 28 and the plurality of heat radiation fins 27 of the main body part 26.

  As shown in FIGS. 3 and 4, the housing 12 includes a fall prevention structure in which a fall prevention fitting 34 is used for the top plate 11. A protrusion 35 and a mounting hole 36 are formed in the lower part of the outer surface of the main body portion 26 between the adjacent radiating fins 27. The protrusion 35 has, for example, a quadrangular prism shape, but may have a cylindrical shape.

  The fall prevention metal fitting 34 is formed of a metal plate that is long and narrow in the vertical direction so that it can be inserted between adjacent heat radiation fins 27. A fixing hole 37 that is screwed to the top plate 11 is formed in the upper part of the fall prevention fitting 34. A hook hole 38 through which the protrusion 35 is inserted and an insertion hole 40 through which the screw 39 is inserted are formed in the lower part of the fall prevention metal fitting 34. Note that the catch hole 38 may be provided in the main body portion 26, and the protrusion may be provided in the fall preventing metal fitting 34.

  As shown in FIG. 1, the light source unit 13 includes a light emitting module 42, a reflector 43, a light transmitting plate 44, a packing 45, a lens retainer 46, and the like.

  In the light emitting module 42, LEDs 48 as a plurality of light emitting elements are mounted on the front surface of the substrate 47, and the plurality of LEDs 48 are sealed with a sealing resin containing a phosphor. That is, the light emitting module 42 is configured by a COB (Chip On Board) module. The back surface of the substrate 47 is attached in a state where it is in thermal contact with the lower surface of the bottom plate portion 30 of the housing 12.

  The reflector 43 is formed in a cylindrical shape that opens up and down, and the inner surface is configured as a reflecting surface. The upper end opening of the reflector 43 is opposed to the light emitting part of the light emitting module 42.

  The translucent plate 44 is made of, for example, glass or resin having translucency, and is formed in a disc shape.

  The packing 45 holds the lower peripheral portion of the reflector 43 and the peripheral portion of the translucent plate 44, and is fitted inside the cylindrical portion 32.

  The lens retainer 46 is attached to the lower surface of the cylindrical portion 32, and holds the reflector 43 and the translucent plate 44 in the cylindrical portion 32 via the packing 45.

  As shown in FIGS. 1 and 5, the power supply unit 14 includes a power supply circuit 51 and a heat shield plate 52 that is also used as a mounting plate for attaching the power supply circuit 51 to the housing 12.

  The power supply circuit 51 converts AC power into predetermined DC power and supplies it to the light emitting module 42. The power supply circuit 51 is housed in the case 53 and disposed at a position separated upward from the bottom plate portion 30 by the heat shield plate 52. A power cable drawn from the drawing hole 22 of the top plate 11 is electrically connected to the power input side of the power circuit 51, and the light emitting module 42 is electrically connected to the output side of the power circuit 51. The power supply circuit 51 and the light emitting module 42 are electrically connected by electric wires that pass through the wiring holes of the bottom plate portion 30.

  The heat shield plate 52 includes a mounting portion 54 that is mounted on the bottom plate portion 30 inside the main body portion 26, a pair of rising portions 55 that rise from the mounting portion 54 so that the upper end side is expanded outward, and Each of the rising portions 55 has a support portion 56 extending outward from the upper end. The attachment portion 54 is attached to the bottom plate portion 30 by screwing or the like. A power supply circuit 51 is mounted on the support portion 56 by screwing or the like.

  The reflecting mirror 15 is formed in a cylindrical shape that opens up and down and expands toward the lower side. The inner surface of the reflecting mirror 15 is formed on the reflecting surface. The reflecting mirror 15 is attached to the housing 12 by a mounting bracket 59. The mounting bracket 59 is formed in a cylindrical shape with an opening at the center, the upper side is attached to the lower part of the cylindrical part 32, and the upper end of the reflecting mirror 15 is locked to the lower side to support the reflecting mirror 15. .

  And the lighting fixture 10 of this embodiment comprised in this way generate | occur | produces the luminous flux of 7200lm with the power consumption of 94W, for example.

  As shown in FIGS. 1 and 2, the luminaire 10 is suspended and installed by a chain 20 fixed to the ceiling, and power is supplied through a power cable from the ceiling side.

  When power is supplied to the power supply circuit 51 through the power cable, lighting power from the power supply circuit 51 is supplied to the light emitting module 42, and the light emitting module 42 emits light.

  Light generated by the light emitting module 42 is irradiated downward from the lower opening of the reflecting mirror 15 through the reflector 43, the light transmitting plate 44 and the reflecting mirror 15.

  In addition, the heat generated by the light emitting module 42 during light emission is mainly conducted to the bottom plate 30 of the main body 26, and from the bottom plate 30 to the inner cylinder 29, the plurality of radiating fins 27, the outer cylinder 28, and the like. The heat is conducted and radiated from the inner cylindrical portion 29, the plurality of heat radiating fins 27, the outer cylindrical portion 28, and the like to the outside air.

  A ventilation path 33 communicating with the vertical direction is formed between the inner cylinder part 29 and the outer cylinder part 28 of the main body part 26 and the plurality of heat radiating fins 27. Therefore, the ventilation path 33 is formed by the chimney effect of the ventilation path 33. An airflow flowing from the bottom to the top is generated, and the heat dissipation effect can be improved.

  Part of the heat transmitted from the light emitting module 42 to the bottom plate portion 30 is radiated from the upper surface of the bottom plate portion 30 into the air in the storage space 31. The hot air rising from the bottom plate portion 30 flows outward along the pair of rising portions 55 and the support portion 56 of the heat shield plate 52 as shown by arrows in FIG. 1, that is, the inner cylinder portion of the main body portion 26. Flows toward the air 29 and is absorbed by the inner tube portion 29 to be radiated into the outside air from the inner tube portion 29, the plurality of heat radiation fins 27, the outer tube portion 28, and the like. This flow of hot air can reduce the influence of heat from the light emitting module 42 on the power supply circuit 51.

  Furthermore, heat generated during operation of the power supply circuit 51 is dissipated into the air in the storage space 31 and is transmitted from the air in the storage space 31 to the top plate 11 and the main body 26, and from the top plate 11 and the main body 26 to the outside air. Heat is dissipated.

  As described above, in the lighting fixture 10 of the present embodiment, the housing 12 integrally provided with the plurality of heat radiation fins 27 is used, and the light emitting module 42 and the power supply circuit 51 are arranged in the housing 12, so that the light emitting module 42 and While ensuring the heat dissipation of the heat generated by each power supply circuit 51, it is possible to reduce the size.

  In addition, since the casing 12 includes the outer cylinder portion 28, the heat radiation area can be increased to improve the heat radiation effect, and the heat radiation fin 27 can be concealed to improve the design.

  Further, the heat shield plate 52 can reduce the influence of the heat from the light emitting module 42 on the power supply circuit 51.

  Further, the casing 12 is prevented from dropping with respect to the top plate 11. In order to prevent the fall, as shown in FIGS. 3 and 4, the upper end of the fall prevention bracket 34 is screwed and fixed to the top plate 11, and the lower end of the fall prevention bracket 34 is passed through the adjacent radiating fins 27 through the main body. Arranged along the outer surface of the portion 26, the catching hole 38 of the fall prevention metal fitting 34 is fitted into the protrusion 35 of the main body portion 26. The housing 12 can be temporarily fixed to the fall prevention fitting 34 by fitting the catch hole 38 of the fall prevention fitting 34 to the protrusion 35 of the main body portion 26. Then, the screw 39 is screwed into the mounting hole 36 of the main body portion 26 from the insertion hole 40 of the fall prevention metal fitting 34 to fix the drop prevention metal fitting 34 to the main body portion 26. Thereby, a strong fall prevention structure using the fall prevention fitting 34 is obtained. Further, since the catching hole 38 of the fall prevention metal fitting 34 is fitted into the projection 35 of the main body 26, even if the screw 39 is loosened and removed due to vibration or the like, the fall prevention effect can be maintained.

  Note that the radiation fins 27 are preferably provided up to above the power supply circuit 51. Thus, heat can be efficiently radiated from the power supply circuit 51.

  Further, if the luminaire 10 is dedicated to the hanging type, the heat radiating fins 27 and the outer cylinder portion 28 may be provided up to the upper end portion of the main body portion 26.

  FIG. 6 shows an example in which the lighting fixture 10 is used as a ceiling-mounted ceiling fixture.

  In this case, instead of suspending the top plate 11 of the lighting fixture 10 with the chain 20 as shown in FIG. 1, the top plate 11 is fixed to the ceiling 62. The casing 12 is attached to the ceiling 62. The reflecting mirror 15 may or may not be used.

  When the luminaire 10 is used as a ceiling-mounted type, the outer cylinder part 28 is located below the main body part 26, so that hot air rising from the air passage 33 is released into the outside air without being blocked by the ceiling 62. Can maintain high heat dissipation.

  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 Top plate
12 Enclosure
26 Main unit
27 Radiation fin
28 Outer tube
34 Fall prevention bracket
35 protrusion
38 Catch hole
42 Light emitting module
51 Power supply circuit
52 Heat shield
54 Mounting part
55 Startup
56 Support

Claims (4)

A light emitting module;
A power supply circuit for supplying power to the light emitting module;
A housing having a light emitting module disposed on the lower surface and housing a power supply circuit therein, and a plurality of heat dissipating fins integrally projecting from an outer peripheral surface of the body;
The lighting fixture characterized by comprising. The housing includes an outer cylinder portion that is disposed around the main body portion with a space between the outer peripheral surface of the main body portion and integrally formed at the tips of the plurality of heat radiating fins. The lighting fixture according to claim 1. A mounting portion that is attached to the bottom surface inside the main body, a rising portion that is inclined so as to expand the upper end side from the mounting portion, and a support portion that is provided at the upper end of the rising portion and supports the power supply circuit The lighting apparatus according to claim 1, further comprising a heat shield plate having the heat shielding plate. A top plate that supports the housing and is attached to the ceiling;
A fall-preventing bracket having an upper end attached to the top plate, a lower end being screwed and fixed to the outer peripheral surface of the main body through the plurality of heat dissipating fins, and a hook hole or a protrusion provided on the lower end. ;
Comprising
The lighting device according to any one of claims 1 to 3, wherein the main body portion is provided with one of the hooking hole and the protrusion.

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