JP2018163889A - Illuminating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an illuminating device that can secure heat dissipation performance while reducing the height of a heat dissipating body.SOLUTION: An illuminating device 10 comprises a light emitting part 33, a heat dissipating body 22, and a power supply unit 26. The heat dissipating body 22 comprises an installation part 37 including a lower part on which the light emitting part 33 is installed, a plurality of first heat dissipating fins 38 protruding upward from the installation part 37, and a plurality of second heat dissipating fins 39 protruding laterally from upper parts of the plurality of first heat dissipating fins 38. The plurality of second heat dissipating fins 39 are provided linearly and continuously from the plurality of first heat dissipating fins 38. The power supply unit 26 supplies electric power to the light emitting part 33.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to a lighting device including a heat radiator that dissipates heat generated by a light emitting unit.

  2. Description of the Related Art Conventionally, an illuminating device including a light emitting unit that uses a light emitting element such as an LED includes a heat radiator in order to efficiently dissipate heat generated by the light emitting unit.

  In such an illuminating device, there is a tendency to increase the size of the heat radiating body in order to improve the heat radiating performance by the heat radiating body in response to the increase in the output of the light emitting unit.

  When the lighting device is a downlight embedded in the ceiling, the size of the radiator in the radial direction is limited by the opening embedded in the ceiling material, and thus the size must be increased in the height direction of the radiator.

  However, if the radiator is increased in size in the height direction, depending on the ceiling structure, the upper part of the radiator may interfere with other structures and the like, which may hinder the installation of the lighting device.

JP 2013-182734 A

  The problem to be solved by the present invention is to provide an illuminating device that can ensure heat dissipation while suppressing the height of the radiator.

  The lighting device of the embodiment includes a light emitting unit, a heat radiator, and a power supply unit. The radiator includes an installation portion in which the light emitting unit is installed at a lower portion, a plurality of first radiation fin portions protruding upward from the installation portion, and a plurality of projections laterally from the upper portions of the plurality of first radiation fin portions. It has a 2nd radiation fin part. The plurality of second radiating fin portions are continuously provided linearly from the plurality of first radiating fin portions. The power supply unit supplies power to the light emitting unit.

  According to the present invention, it can be expected to ensure the heat dissipation of the radiator while suppressing the height of the radiator.

It is sectional drawing of the illuminating device which shows 1st Embodiment. It is the perspective view seen from the illumination device same as the above. It is the perspective view seen from under the illuminating device same as the above. It is a side view of an illuminating device same as the above. It is a side view of the illuminating device which shows 2nd Embodiment.

  Hereinafter, a first embodiment will be described with reference to FIGS. 1 to 4.

  The lighting device 10 is an embedded lighting device. The embedded lighting device is a downlight. The illumination device 10 is embedded and installed in a circular opening 12 opened in the ceiling member 11. The thickness of the ceiling member 11 is about 5 to 25 mm.

  The lighting device 10 includes a lamp device 20 and an instrument 21 on which the lamp device 20 is disposed. Furthermore, the lighting device 10 includes a radiator 22 and a decorative frame 23 that constitute the appliance 21, and includes a socket 24, a reflector 25, and a power supply unit 26 that are disposed on the radiator 22.

  The lamp device 20 covers the housing 28, a metal heat dissipating member 29 attached to the top of the housing 28, the light emitting module 30 attached to the lower surface of the heat dissipating member 29, and the light emitting module 30. A translucent cover 31 attached to the lower surface of the housing 28 is provided. The upper side of the housing 28 is configured as a base that is detachably attached to the socket 24.

  The light emitting module 30 includes a substrate 32 and a light emitting unit 33 formed on the substrate 32. The light emitting unit 33 includes a plurality of light emitting elements mounted on the substrate 32. The light emitting unit 33 may use a COB (Chip On Board) module and SMD (Surface Mount Device) package using LEDs as light emitting elements, or may use other light emitting elements such as EL elements.

  In addition, the appliance 21 includes a radiator 22 as an appliance body, and a decorative frame 23 attached to the lower portion of the radiator 22.

  The radiator 22 is made of a metal material. For example, aluminum die casting is used as the metal material.

  The radiator 22 has a disk-like base portion 36. The diameter of the base portion 36 is smaller than the inner diameter of the opening 12 of the ceiling member 11. On the lower surface of the base portion 36, a planar installation portion 37 for installing the lamp device 20 is formed. Since the lamp device 20 installed in the installation unit 37 includes the light emitting unit 33, the light emitting unit 33 is installed in the installation unit 37.

  The heat radiating body 22 includes a plurality of first heat radiating fin portions 38 protruding upward from the upper surface of the base portion 36, and a plurality of second heat radiating portions protruding laterally from the upper portion of the side surface 38 a of the first heat radiating fin portion 38. A fin portion 39 is provided. The first radiating fin portion 38 and the second radiating fin portion 39 are integrally formed, but may be separated as long as they are thermally connected.

  The first radiating fin portions 38 are formed in parallel with a gap 40 therebetween in the width direction (parallel direction). A connecting portion 41 that protrudes from the base portion 36 and integrally connects the plurality of first radiating fin portions 38 is formed at the central portion of the first radiating fin portion 38. The periphery of the first radiating fin portion 38 is located in the upper region of the base portion 36 and is formed smaller than the inner diameter of the opening 12 of the ceiling member 11. The upper surface of the first radiating fin portion 38 is formed horizontally. A relief portion 42 having a shape in which a corner portion opposite to the protruding direction of the second radiation fin portion 39 is obliquely removed is formed on the upper portion of the first radiation fin portion 38. The escape portion 42 may have a linear shape or a curved shape.

  The second radiating fin portions 39 are formed in parallel with a gap 43 therebetween in the width direction (parallel direction). The second radiating fin portion 39 is continuous from the first radiating fin portion 38 and is provided in a straight line and in parallel with the first radiating fin portion 38. The upper surface of the second radiating fin portion 39 is formed horizontally and continuously with the upper surface of the first radiating fin portion 38. The lower surface 39a of the second radiating fin portion 39 is inclined such that the tips of the second radiating fin portions 39 on both sides are inclined upward with respect to the second radiating fin portion 39 on the center side. The lower surface 39a of the second radiating fin portion 39 is set to a position that does not interfere with the mounting spring 48 when the mounting spring 48 described later is placed along the decorative frame 23 when the lighting device 10 is installed. The dimensions of the second radiating fin portion 39 in the vertical direction and the width direction are smaller than the inner diameter of the opening 12 of the ceiling member 11.

  The decorative frame 23 has a decorative frame main body 46 formed in a cylindrical shape. The outer diameter of the decorative frame body 46 is smaller than the inner diameter of the opening 12 of the ceiling member 11. A flange 47 is formed at the lower part of the decorative frame 23 so as to contact the lower surface of the ceiling member 11 and cover the opening 12 when the lighting device 10 is installed. Around the decorative frame 23, a plurality of attachment springs 48 for attaching the ceiling are attached. In the present embodiment, three attachment springs 48 are used, and one of the attachment springs 48 is disposed below the second radiating fin portion 39.

  In addition, the socket 24 is attached to the installation part 37 of the radiator 22. The base of the lamp device 20 is detachably attached to the socket 24. An insertion hole 51 through which the heat dissipation member 29 of the lamp device 20 is inserted is formed in the center of the socket 24. When the lamp device 20 is attached to the socket 24, the heat radiating member 29 inserted through the insertion hole 51 comes into contact with the installation portion 37 of the heat radiating body 22, and the heat radiating member 29 and the heat radiating body 22 are thermally connected. Further, when the lamp device 20 is attached to the socket 24, the socket 24 and the lamp device 20 are electrically connected, and the DC power output from the power supply unit 26 can be supplied to the light emitting module 30 of the lamp device 20.

  The reflector 25 is detachably mounted in the decorative frame 23 by a mounting bracket provided on the radiator 22. The reflector 25 is formed in a cylindrical shape that expands downward.

  The power supply unit 26 includes a long case 54 and a power circuit 55 accommodated in the case 54. The case 54 includes a top plate 56 and a case main body 57 attached to the lower surface of the top plate 56. Note that the periphery intersecting the longitudinal direction of the power supply unit 26 is formed smaller than the inner diameter of the opening 12 of the ceiling member 11.

  Side plates 58 bent downward are formed on both sides of the top plate 56, and one end of the side plate 58 is attached to the upper portion of the radiator 22 by an attachment member 59. The attachment member 59 is attached to the upper end of the second radiating fin portion 39 on the front end side. Both side plates 58 of the top plate 56 are connected to both sides of the mounting member 59 by a shaft 60 so as to be rotatable. Therefore, the power supply unit 26 is attached to the distal end side of the second radiating fin portion 39 of the radiator 22. Further, the power supply unit 26 is attached to the front end side of the second radiating fin portion 39 of the heat radiating body 22 so as to be swingable in the vertical direction around the shaft 60.

  At the other end of the top plate 56, a leg portion 61 that is placed on the upper surface of the ceiling member 11 is formed. The leg portion 61 projects downward from the side plate 58, and an inclined portion 62 is formed between the leg portion 61 and the side plate 58.

  The power supply circuit 55 is configured to input AC power, convert the AC power into predetermined DC power, and supply the AC power to the light emitting module 30 of the lamp device 20 through the socket 24.

  A terminal block 63 is attached to the distal end side of the top plate 56, and the terminal block 63 and the power supply circuit 55 are connected by electric wires.

  Next, the operation of this embodiment will be described.

  When installing the lighting device 10, a power line or a signal line wired above the ceiling member 11 is drawn from the opening 12 below the ceiling member 11 and connected to the terminal block 63 of the power unit 26. To do.

  With the front end side of the power supply unit 26 facing upward, the front end side of the power supply unit 26 is inserted into the opening 12, and the power supply unit 26 inserted into the opening 12 is tilted to the upper region of the ceiling member 11.

  With the tip side from which the second radiating fin portion 39 protrudes facing upward, the tip side of the second radiating fin portion 39 is inserted into the opening 12 following the power supply unit 26. Thereafter, the upper portion of the first radiating fin portion 38 is inserted into the opening portion 12 while rotating the radiator 22 (apparatus 21) so that the upper portion of the first radiating fin portion 38 is inserted into the opening portion 12. .

  At this time, as shown in FIG. 4, the lower surface 39a of the second radiating fin portion 39 or the side surface 38a of the first radiating fin portion 38 facing the lower surface 39a of the second radiating fin portion 39 is opened to the opening portion 12. The heat radiating body 22 can be smoothly rotated by rotating the heat radiating body 22 with the abutting portion as a fulcrum P, and the upper portion of the first heat radiating fin portion 38 is connected to the opening 12. Can be inserted easily.

  Note that if the radiator 22 that rotates around the fulcrum P of the opening 12 is within the imaginary line A drawn with the diameter of the opening 12 around the fulcrum P, the radiator 22 is opened. Can be inserted into part 12. The shape of the radiator 22 that can be inserted into the opening 12 can be set by the position of the lower surface 39a of the second radiating fin portion 39, the shape of the escape portion 42 of the first radiating fin portion 38, and the like.

  Subsequently, in a state where the plurality of mounting springs 48 are elastically deformed and held along the side surface of the heat radiating body 22, the lower portion of the heat radiating body 22 and the front ends of the plurality of mounting springs 48 are inserted into the opening portion 12. If the distal ends of the plurality of attachment springs 48 are inserted into the opening 12, the holding of the plurality of attachment springs 48 may be released. The plurality of attachment springs 48 released from holding are expanded outward by elasticity, and come into contact with the upper edge of the opening 12 of the ceiling member 11.

  Further, the lower part of the radiator 22, the plurality of attachment springs 48, and the decorative frame 23 are inserted into the opening 12. When inserted into the opening 12, the plurality of mounting springs 48 act to raise the appliance 21 above the ceiling member 11 by elasticity. As a result, the flange 47 of the decorative frame 23 contacts the lower surface of the ceiling member 11, and the ceiling member 11 is sandwiched and held between the flange 47 and the plurality of attachment springs 48.

  The power supply unit 26 is rotated according to the thickness of the ceiling member 11, the leg portion 61 on the distal end side of the power supply unit 26 is placed on the upper surface of the ceiling member 11, and the distal end side of the power supply unit 26 is supported by the ceiling member 11. .

  Then, after the lighting device 10 is installed, by supplying DC power from the power supply unit 26 to the light emitting module 30 of the lamp device 20, the light emitting unit 33 of the light emitting module 30 emits light, and the light from the light emitting unit 33 is reflected by the reflector 25. It passes through the interior and is emitted to the lower illumination space.

  Heat generated when the light emitting unit 33 emits light is transmitted from the substrate 32 to the heat radiating member 29, transmitted from the heat radiating member 29 to the heat radiating member 22, and radiated from the heat radiating member 22 into the air.

  The heat of the light emitting section 33 transmitted to the heat radiating body 22 is transmitted to the whole including the first heat radiating fin section 38 and the second heat radiating fin section 39 of the heat radiating body 22.

  As shown in FIG. 1, when heat is transmitted to the first radiating fin portion 38, the air heated by the first radiating fin portion 38 rises from the upper side of the first radiating fin portion 38, and is heated. Air having an ambient temperature flows into the gap 40 of the first radiating fin portion 38 from the lower side of the first radiating fin portion 38, and the air flow F1 flows from below to above through the gap 40 of the first radiating fin portion 38. Arise. Heat can be efficiently radiated from the first radiating fin portion 38 by the air flow F1.

  Furthermore, when heat is transmitted to the second radiating fin portion 39, the air heated by the second radiating fin portion 39 rises from the upper side of the second radiating fin portion 39, and the air at the ambient temperature before the warming is heated. From the lower side of the second radiating fin portion 39, the air flows into the gap 43 of the second radiating fin portion 39, and an air flow F2 is generated from below to above through the gap 43 of the second radiating fin portion 39. The air flow F2 can efficiently radiate heat from the second radiating fin portion 39. Since the second radiating fin portion 39 protrudes to the side of the first radiating fin portion 38 and has the lower surface 39a, an air flow F2 passing from the lower surface 39a to the upper surface is generated, and a high heat radiating effect is obtained. be able to.

  And since the illuminating device 10 of this embodiment is equipped with the heat radiator 22 which protruded the 2nd heat sink fin part 39 to the side from the upper part of the 1st heat sink fin part 38, the height of the heat sink 22 is suppressed. However, it is possible to ensure the heat dissipation of the heat radiating body 22 that can cope with the high output of the lamp device 20.

  In addition, since the first and second heat dissipating fin portions 38 and 39 are provided in a straight line and in parallel, the flow of air generated by heat dissipation is smooth and heat dissipating, and the manufacturability of the heat dissipating member 22 is improved. Good.

  Further, since the power supply unit 26 is attached to the distal end side of the second heat dissipating fin portion 39 of the heat radiating body 22, the power supply unit 26 and the heat radiating body 22 can be inserted into the opening 12 of the ceiling member 11.

  When removing the lighting device 10 from the ceiling member 11, the decorative frame 23 is pulled downward against the bias of the plurality of mounting springs 48, the plurality of mounting springs 48 are removed downward from the opening 12, and the second The radiator 22 is removed downward from the opening 12 while rotating the radiator 22 so that the heat radiating fins 39 face upward, and the power supply unit 26 is removed downward from the opening 12. At this time, the leg portion 61 protrudes downward from the front end side of the power supply unit 26, but since the leg portion 61 and the side plate 58 are connected by the inclined portion 62, the leg portion 61 is located above the ceiling member 11. The power supply unit 26 can be easily removed from the opening 12 without the leg 61 being caught by the arranged wiring or structure.

  The position of the lower surface 39a of the second radiating fin portion 39 may be equal to or greater than the thickness of the ceiling member 11 from the upper surface of the flange 47 of the decorative frame 23. In this embodiment, since the mounting spring 48 is used for installing the lighting device 10, the lower surface 39 a of the second radiating fin portion 39 interferes with the mounting spring 48 when the mounting spring 48 is placed along the decorative frame 23. Any position that does not need to be used. In addition, the dimensions of the second radiating fin portion 39 in the vertical direction and the width direction may be smaller than the inner diameter of the opening portion 12 so that the second radiating fin portion 39 can be inserted into the opening portion 12 of the ceiling member 11.

  Next, FIG. 5 shows a second embodiment. In addition, the same code | symbol is used about the same structure as 1st Embodiment, and the description of the structure and effect is abbreviate | omitted.

  FIG. 5 shows a lighting device 10 for an inclined ceiling in which the ceiling member 11 is inclined. The inclination angle of the ceiling member 11 is, for example, 20 ° with respect to the horizontal plane.

  The decorative frame 23 includes an upper plate 70 attached to the lower portion of the radiator 22, a frame portion 71 that fits into the opening 12 of the ceiling member 11, and a support portion 72 that connects the upper plate 70 and the frame portion 71. . The support part 72 is provided perpendicular to the frame part 71.

  A guide groove 73 is formed in the support portion 72 along the longitudinal direction (vertical direction) of the support portion 72. An attachment fitting 74 is slidably attached to the guide groove 73 of the support portion 72 along the guide groove 73. The upper portion of the mounting bracket 74 is slidably connected to the guide groove 73, and the lower portion of the mounting bracket 74 can project laterally from the support portion 72 with the upper portion as a fulcrum. Then, after the decorative frame 23 is inserted into the opening 12 of the ceiling member 11 together with the power supply unit 26 and the heat radiating body 22, the mounting bracket 74 positioned above the upper surface of the ceiling member 11 is slid downward, thereby mounting bracket The lower part of 74 protrudes sideways and is caught on the ceiling member 11, and the upper part of the mounting bracket 74 is fixed in pressure contact with the support part 72. Thus, the ceiling member 11 is sandwiched and held between the frame portion 71 and the mounting bracket 74.

  The lower portion of the reflector 25 is formed in an inclined shape in accordance with the inclination of the ceiling member 11 so as to be parallel to the frame portion 71.

  And in the illuminating device 10 of the ceiling mounting structure using the mounting bracket 74, the lower surface 39a of the 2nd radiation fin part 39 may be restrict | limited to the position which does not interfere with the mounting spring 48 like 1st Embodiment. Instead, the lower surface 39a of the second radiating fin portion 39 is positioned on the lower side of the first radiating fin portion 38, so that the second radiating fin portion 39 can be increased in size and the heat radiating effect can be improved. In this case as well, the dimensions of the second radiating fin portion 39 in the vertical direction and the width direction may be smaller than the inner diameter of the opening 12 so that the second radiating fin portion 39 can be inserted into the opening 12 of the ceiling member 11.

  In the lighting device 10, the second radiating fin portion 39 and the power supply unit 26 are arranged toward the rising side in the tilt direction of the ceiling member 11.

  If the second radiating fin portion 39 and the power supply unit 26 are arranged facing the descending side in the inclined direction of the ceiling member 11, the power supply unit 26 is placed with the distal end side of the power supply unit 26 placed on the ceiling member 11. And the temperature of the upper side of the inclined power supply unit 26 is likely to rise, and the life of the power supply unit 26 is likely to be affected. In order to prevent this, the power supply unit 26 must be lengthened, and the power supply unit 26 is increased in size.

  By disposing the second radiating fin portion 39 and the power supply unit 26 toward the rising side in the inclination direction of the ceiling member 11, the inclination of the power supply unit 26 with the front end side of the power supply unit 26 resting on the ceiling member 11 can be reduced. As a result, the bias of the temperature distribution of the power supply unit 26 can be reduced, and the life of the power supply unit 26 can be extended. Furthermore, it is not necessary to lengthen the power supply unit 26, and the power supply unit 26 can be downsized.

  In the lighting device 10, the light emitting part may be attached to the installation part 37 of the radiator 22 without using the lamp device 20, the socket 24, or the like.

  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 Ceiling members
12 opening
22 radiator
26 Power supply unit
33 Light emitter
37 Installation section
38 First radiating fin
39 2nd radiation fin part A Virtual line P Support point

Claims (3)

A light emitting part;
An installation part in which the light emitting part is installed in the lower part, a plurality of first radiation fin parts protruding upward from the installation part, and a plurality of first projections projecting laterally from the upper part of the plurality of first radiation fin parts A heat dissipating body having two heat dissipating fin portions, wherein the plurality of second heat dissipating fin portions are continuously provided linearly from the plurality of first heat dissipating fin portions;
A power supply unit for supplying power to the light emitting unit;
An illumination device comprising: The heat radiator can be inserted into the opening by being pivoted about the edge of the opening of the ceiling member, and is hypothetical drawn with the diameter of the opening around the fulcrum of the edge of the opening. The illumination device according to claim 1, wherein the illumination device is provided in a shape that fits within a line. The lower surfaces of the plurality of second radiating fin portions are inclined such that the tip ends of the second radiating fin portions located on both sides with respect to the second radiating fin portion located on the center side are inclined upward. The lighting device according to claim 1 or 2, characterized in that:

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