JP2013093270A - Lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting system of superb workability enabling construction whether a height of a space above a ceiling is low while a space in a lateral direction is enough or a height of a space above a ceiling is high while a space in a lateral direction is scarce.SOLUTION: The lighting system is provided with a substrate having light-emitting elements on the surface, a heat sink 5, for radiating heat generated and transferred from the light-emitting elements into the air, equipped with a plurality of fins of which outermost fins 5b each have a slit, and a power supply unit 2 with leg parts 16 which can be inserted into the slits for feeding electric current to the light-emitting elements.

Description

  The present invention relates to an illumination device such as a downlight embedded in a ceiling, and an illumination device.

Among lighting devices that use LED (Light Emitting Diode) as a light source, a device having a structure in which a control power supply is housed in a main body of an appliance is known as a related art.
For example, in a lighting device such as a downlight embedded in a ceiling, a power circuit board is housed inside a cylindrical main body that functions as a heat sink attached to a board on which LEDs are mounted. The cylindrical main body is embedded in the ceiling, and the LED element emits light from the position of the ceiling surface to illuminate the room (for example, see Patent Document 1).

  In addition, there is a configuration in which a downlight main body having an LED element and a power supply unit are configured separately and connected by lead wires on the back of the ceiling (for example, Patent Document 2).

JP 2009-301810 A (paragraphs 0015, 0016, 0020, FIG. 2) JP 2010-257590 A (0021-0023, FIG. 2)

However, in the conventional lighting device of Patent Document 1, since the appliance and the control power supply unit are integrated, there is an advantage that the appliance is easy to handle and has excellent workability. In the case of a lighting device having a function such as adapting to the above, there is a tendency that the control power supply substrate tends to be large, and as a result, there is a problem that the height of the fixture embedded in the ceiling becomes large.
Moreover, in the lighting device of the conventional patent document 2, there is a fixture structure in which a lamp part and a control power source part are made independent and an electrical wire is connected between both objects as an instrument corresponding to an environment where the space behind the ceiling is low. However, there is a problem that the structure of the separated instrument is difficult to handle at the time of construction, and the workability is poor, and it tends to be used only in a specific place where the height of the ceiling is limited.
For the reasons described above, there is a problem that the manufacturer needs to manufacture two types of models, that is, a device with a low embedding depth and an integrated type with good workability according to the environment in which the work is performed.

  The present invention provides a lighting device with good workability that can be constructed in any case where the height of the ceiling is low but there is a space in the horizontal direction, or when the height of the ceiling is high but there is no space in the horizontal direction. The purpose is to provide.

  In order to solve the above problems, an illumination device according to the present invention is attached to a substrate having a light emitting element on a front surface and a back surface of the substrate, and heat generated from the light emitting element is transmitted to dissipate heat in the air. A heat sink comprising a plurality of fins, a heat sink in which a slit is formed in an outermost fin of the plurality of fins, and a leg portion that can be inserted into the slit, and the light emitting element And a power supply unit for supplying current to the.

The present invention can attach or remove the leg portion of the power supply unit to the slit of the radiating fin, or construct the lighting device according to the situation of the construction site.

FIG. 3 is a perspective view of lighting device 100 in a state where power supply unit 2 is removed from lighting unit 1 according to the first embodiment. The side view of the illuminating device 100 of FIG. FIG. 3 is a perspective view of lighting device 100 in a state where power supply unit 2 is attached to lighting unit 1 according to the first embodiment. The side view of the illuminating device 100 of FIG. FIG. 2 is a bottom view of lighting device 100 according to the first embodiment. FIG. 3 is an exploded view of the lighting apparatus 100 according to the first embodiment. FIG. 3 is an enlarged view of a leaf spring 9 of the illumination device 100 according to the first embodiment. AA sectional drawing of the illuminating device 100 of FIG. FIG. 9 is a cross-sectional view showing a state where the power supply unit 2 is attached to the illumination unit 1 of the illumination device 100 of FIG. 8. The perspective view of the illuminating device 200 of the state which removed the power supply unit 42 from the illumination unit 41 of Embodiment 2. FIG. The perspective view of the illuminating device 200 of the state which attached the power supply unit 42 from the illumination unit 41 of Embodiment 2. FIG. BB sectional drawing of FIG.

Embodiment 1 FIG.
The lighting device 100 according to the first embodiment will be described with reference to FIGS.

  First, the structure of the illuminating device 100 is demonstrated using FIG.1 and FIG.2. 1 and 2 illustrate a state in which the power supply unit 2 is removed from the lighting unit 1.

  The lighting device 100 includes a lighting unit 1 and a power supply unit 2. The lighting unit 1 and the power supply unit 2 are electrically connected by a flexible wiring 3 that is a lead wire. The wiring 3 can be bent or twisted.

  The illumination unit 1 includes a substrate storage unit 4 and a heat sink 5. The substrate storage unit 4 stores a substrate on which a light emitting LED element is provided. The detailed configuration of the substrate storage unit 4 will be described later with reference to FIG. The heat sink 5 is attached to the bottom of the substrate storage unit 4. Heat generated from the LED elements provided in the substrate storage portion 4 is transmitted to the heat sink 5. Heat generated in the LED element is dissipated from the heat sink 5 into the air, and the substrate and the LED element stored in the substrate storage unit 4 are cooled. The substrate housing 4 is open at the bottom, and a heat sink 5 is attached to the upper end surface on the opposite side.

The configuration of the heat sink 5 will be described. The heat sink 5 is made of a metal having good thermal conductivity such as aluminum die casting. The heat sink 5 includes a plurality of inner radiating fins 5a and a pair of outer radiating fins 5b arranged outside the inner radiating fins 5a. The inner radiating fin 5a is composed of a plurality of substantially plate-like fins arranged in parallel with a gap. The outer radiating fins 5b are provided on both outer sides of the inner radiating fins 5a substantially in parallel with the inner radiating fins 5a. The outer radiating fin 5b is thicker than the inner radiating fin 5a in a direction substantially orthogonal to the longitudinal direction of the inner radiating fin 5a.
The heat sink 5 is provided on the upper end surface of the substrate storage portion 4, and the substrate on which the LED elements are provided is directly attached to the heat sink 5 by screws or the like. The LED element irradiates downward from an opening formed on the side opposite to the heat sink 5 in the substrate housing 4.
In the first embodiment, the inner radiating fin 5a is constituted by eight radiating fins, and the outer radiating fin 5b is shown by a heat sink 5 constituted by two radiating fins.

  The outer radiating fin 5b is formed with a horizontal slit 6 from the side edge to a certain distance in the middle in the height direction. The slit 6 is formed up to the vicinity of the middle of the outer radiation fin 5b in the horizontal direction. The slit 6 may be parallel to the substrate on which the LED elements are mounted, or not parallel to an attachment frame 23 (to be described later) of the substrate storage unit 4, even if it is not horizontal.

In the upper part of the slit 6, a recess 7 is formed in the outer radiation fin 5 b.
The concave portion 7 has a bottom portion formed from the opening toward the substrate housing portion 4 on the opposite side from the upper end surface of the outer radiation fin 5b.

The lighting device 100 is embedded in an opening formed in the ceiling, and the opening on the lower surface of the substrate housing portion 4 on which the LED element is provided is exposed from the opening in the ceiling, and the LED element irradiates downward.
Three leaf springs 8 for attachment are provided on the outer periphery of the substrate storage portion 4. When the lighting device 100 is embedded in the opening formed in the ceiling surface, the mounting leaf spring 8 applies a biasing force toward the outside of the opening in the ceiling surface direction. Due to the urging force of the mounting plate spring 8, the lighting device 100 is caught by the opening of the ceiling and is prevented from falling off.

The power supply unit 2 includes a control power supply board inside a substantially rectangular parallelepiped case 15, and converts an alternating current supplied from an external commercial power source into a direct current having an arbitrary voltage or an alternating current having an arbitrary frequency. Then, power is supplied to the LED elements of the illumination unit 1. The control power supply board in the power supply unit 2 is also provided with a lighting circuit and the like, and can control the lighting of the LED elements.
Plate-shaped leg portions 16 are provided at the lower four corners of the case 15. The side surface of the case 15 where the leg portion 16 is provided extends downward from the lower surface of the case 15, and the end portion thereof is bent at a substantially right angle to form the leg portion 16. The leg portion 16 is positioned below the lower surface of the case 15, and the leg portion 16 is orthogonal to the side surface of the case 15.
A fixing hole 17 is formed on the upper surface of the leg 16. In addition, the fixing hole 17 should just fit the embossing part 28 mentioned later of the leaf | plate spring 9, and may be a hollow even if it is a through-hole.
In addition, the leg part 16 being provided orthogonally to the side surface of the case 15 means that the leg part 16 is disposed in the horizontal direction in a state where the power supply unit 2 is placed on a horizontal base.

  The power supply unit 2 is provided with a power supply connector 18, and the power supply connector 18 is connected to an external commercial power source serving as a power source. This commercial power supply supplies power to the control power supply board through the power supply connector 18.

Next, the lighting device 100 in a state where the power supply unit 2 is attached to the lighting unit 1 will be described with reference to FIGS. 3 and 4.
The legs 16 of the power supply unit 2 are inserted from the horizontal direction into the slits 6 formed in the outer heat radiation fins 5 b of the heat sink 5. The end of the slit 6 on the opening side is tapered so that the leg 16 can be easily inserted into the slit 6.
When the leg portion 16 is inserted into the slit 6, the power supply unit 2 is placed on a part of the upper surface of the heat sink 5. The upper surface of the heat sink 5 is an end surface on the opposite side to the substrate storage portion 4.
Moreover, the wiring 3 is bent at the gap between the fins of the inner heat radiation fin 5a.

  The manufacturer of the lighting device 100 needs to pack the lighting unit 1 and the power supply unit 2 separately when shipping the lighting device 100 from the factory in the state of FIGS. Further, if the lighting unit 1 and the power supply unit 2 are separately packed, the wiring 3 at the time of delivery may be disconnected. However, when the lighting device 100 is shipped in the state of FIGS. 3 and 4, the lighting unit 1 and the power supply unit 2 can be packed together, and the amount of packing members used can be reduced. Moreover, since the power supply unit 2 is attached to the illumination unit 1, it is possible to prevent the wiring 3 from being disconnected.

  Further, since the plate-like leg portion 16 inserted into the slit 6 is in surface contact with the outer radiating fin 5 b on the inner peripheral surface of the slit 6, the heat of the heat sink 5 is passed through the outer radiating fin 5 b and the leg portion 16. Is conducted to the case 15. Since the heat transmitted to the case 15 is radiated from the surface of the case 15, the case 15 can be used as a heat radiating member.

Here, the structure of the board | substrate storage part 4 is demonstrated using FIG.
FIG. 5 is a bottom view of the lighting unit 1 of FIGS. 1 to 4. A plurality of LED elements 20 are provided at the center of the lower surface of the substrate housing 4. A reflector 21 is provided so as to surround these LED elements 20. A reflection surface 22 is formed around the reflection plate 21, and the light generated from the LED element 20 is reflected by the reflection surface 21 and the reflection surface 22 which is the inner peripheral surface of the substrate storage unit 4 to provide a ceiling. The lower part of the illumination device 100 is irradiated.
A mounting frame 23 is provided around the reflecting surface 22. When the lighting device 100 is installed on the ceiling, the mounting frame 23 comes into contact with the end of the ceiling opening.

  FIG. 6 is a partially exploded view of the lighting device 100. A leaf spring 9 and a screw 10 are attached to the recess 7 formed on the upper surface of the outer radiation fin 5b. Detailed configurations of the recess 7 and the leaf spring 9 will be described below.

FIG. 7 is a perspective view of the leaf spring 9. The leaf spring 9 has a recess in the center. Flat portions 25a and 25c are provided on both sides of the central recess of the leaf spring 9, and the bottom of the central recess is the flat portion 25b. A hole 27 is formed in the flat portion 25a, and an embossed portion 28 is formed in the flat portion 25b. The embossed portion 28 is a hemispherical convex portion protruding to the opposite side to the flat portions 25a and 25b.
The flat portion 25b and the flat portion 25a are connected by an inclined portion 26a, and the flat portion 25b and the flat portion 25c are connected by an inclined portion 26b.

FIG. 8 shows a cross-sectional view taken along line AA of the illumination device 100 in FIG. FIG. 8 particularly shows a cross section of the outer radiation fin 5b.
The shape of the recessed part 7 of the outer side radiation fin 5b is demonstrated using FIG. First, the concave portion 7 has a two-step bottom, and a screw hole 30 is formed in the first bottom surface 31 that is the bottom of the first step, and the second bottom surface 32 that is the bottom of the second step is described above. A slit 6 is arranged. That is, the inner peripheral surface of the slit 6 on the substrate storage portion 4 side is the second bottom surface 32.

FIG. 9 shows a state where the power supply unit 2 is attached to the illumination unit 1 in the cross-sectional view of FIG. The legs 16 of the power supply unit 2 are inserted into the slits 6 arranged on the second bottom surface 32.
Further, a leaf spring 9 is attached to the recess 7 of the outer radiation fin 5b, and the leaf spring 9 is fixed to the outer radiation fin 5b by a screw 10 as a fixing member.
The arrangement of the recess 7, the leaf spring 9 and the screw 10 will be described. The flat portion 25 a and the flat portion 25 c of the leaf spring 9 are disposed on the first bottom surface 31 of the recess 7, and the flat portion 25 b of the leaf spring 9 is disposed on the second bottom surface 32 of the recess 7.
The positions of the holes 27 formed in the flat portion 25a and the screw holes 30 formed in the first bottom surface 31 are substantially the same. By inserting the screw 10 into the holes 27 and the screw holes 30, the leaf spring 9 is It is fixed to the outer heat radiation fin 5b.
The embossed portion 28 of the flat portion 25 b of the leaf spring 9 is fitted in the fixing hole 17 of the leg portion 16 of the power supply unit 2 at the second bottom surface 32.
The flat portion 25 c of the leaf spring 9 is pressed against the first bottom surface 31 by the urging force of the leaf spring 9.

  Thus, since the plate spring 9 is fixed with the screw 10, when the leg portion 16 is pulled out from the slit 6, the plate spring 9 is lifted along the inclination of the embossed portion 28, and the leg portion 16 is fixed to the fixing hole. 17 is configured to be hooked on the embossed portion 28 of the leaf spring 9 fitted to the member 17. Thus, since the leg portion 16 is fixed to some extent by the embossed portion 28 of the leaf spring 9, the power supply unit 2 cannot be easily detached from the illumination unit 1, but the power supply unit 2 is separated from the illumination unit 1 in parallel with the slit 6. When the pulling force is applied more strongly, the embossed portion 28 is detached from the fixing hole 17 of the leg portion 16. Therefore, the user can remove the power supply unit 2 from the lighting unit 1 only by applying a force for pulling out the power supply unit 2 without removing the screw 10 and removing the leaf spring 9 from the recess 7. When the portion 16 is inserted into the slit 6, the embossed portion 28 fits into the fixing hole 17 of the leg portion 16 by applying a force enough to lift the leaf spring 9. Therefore, the leg portion 16 can be easily inserted into the slit 6. Therefore, the power supply unit 2 can be easily attached to the lighting unit 1.

  As described above, since the power supply unit 2 can be easily attached to or detached from the lighting unit 1, the lighting device 100 has good workability according to the size of the space behind the ceiling of the enforcement place. be able to. Also, by providing such a lighting device 100, the installer does not need to select and purchase a lighting device suitable for the installation environment.

Embodiment 2. FIG.
In the second embodiment, the lighting device 200 will be described. In the following description of the lighting apparatus 200, the same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
In the first embodiment, the lighting device 100 in which the leg portion 16 of the power supply unit 2 and the slit 6 of the lighting unit 1 are horizontally oriented when mounted on the ceiling has been described. However, in the second embodiment, the power supply unit 42 is provided. The illumination device 200 having a configuration in which the leg portion 56 and the slit 46 of the illumination unit 41 are oriented in the vertical direction will be described.

  10 and 11 are perspective views of the illumination device 200 according to the second embodiment. 10 shows a state before the power supply unit 42 is attached to the lighting unit 41, and FIG. 11 shows a state after the power supply unit 42 is attached to the lighting unit 41.

  The power supply unit 42 of the lighting device 200 according to the second embodiment has a substantially rectangular parallelepiped shape similarly to the power supply unit 2 of the lighting device 100 according to the first embodiment, and the side surfaces of the power supply unit 42 are extended at the four corners. Four leg portions 56 formed in this manner are provided. A fixing hole 57 is formed in each leg portion 56. The leg portion 56 is arranged to extend downward from the lower surface of the case 15 like the leg portion 16 of the first embodiment.

  The configuration of the heat sink 45 of the lighting unit 41 of the lighting device 200 will be described. As in the first embodiment, the heat sink 45 is attached to the substrate storage unit 4. The heat sink 45 includes a plurality of inner radiating fins 45a and outer radiating fins 45b arranged outside the inner radiating fins 45a. The inner radiating fin 45a is composed of a plurality of substantially plate-like fins arranged in parallel with a gap therebetween. The outer radiating fins 45b are provided on both outer sides of the inner radiating fins 45a substantially in parallel with the inner radiating fins 45a. The outer radiating fin 45b is thicker than the inner radiating fin 45a in a direction substantially perpendicular to the longitudinal direction of the inner radiating fin 45a.

The outer radiating fin 45b has a slit 46 formed in parallel with the longitudinal direction of the inner radiating fin 45a.
A plate-like leg portion 56 of the power supply unit 42 is inserted into the slit 46.
A concave portion 47 is formed on the outer peripheral side surface of the outer radiation fin 5b. A plate spring 9 is provided in the concave portion 47 as in the first embodiment, and the plate spring 9 is fixed to the outer heat radiation fin 45 b by a screw 10. The arrangement of the leaf spring 9 and the screw 10 in the recess 47 will be described later with reference to FIG.

FIG. 12 is a cross-sectional view taken along the line B-B in FIG. 11, and illustrates a state where the leg portion 56 is inserted into the slit 46.
The concave portion 47 of the lighting device 200 has a two-step bottom like the concave portion 7 of the first embodiment, and a screw hole 60 is formed in the first bottom surface 61 that is the bottom of the first step. The above-described slit 46 is arranged on the second bottom surface 62 which is the bottom of the above. That is, the inner peripheral surface of the slit 46 on the inner radiation fin 45 a side becomes the second bottom surface 62. The leg portion 56 of the power supply unit 42 is inserted into the slit 46 disposed on the second bottom surface 62.
A leaf spring 9 is attached to the recess 47 of the outer radiation fin 45b, and the leaf spring 9 is fixed to the outer radiation fin 45b by a screw 10.
The recess 47 has a bottom portion formed from an opening from the outer peripheral surface of the outer radiating fin 45b toward the inner radiating fin 45a.

The arrangement of the recess 47, the leaf spring 9, and the screw 10 will be described. The flat portion 25 a and the flat portion 25 c of the leaf spring 9 are disposed on the first bottom surface 61 of the recess 47, and the flat portion 25 b of the leaf spring 9 is disposed on the second bottom surface 62 of the recess 47.
The positions of the hole 27 formed in the flat portion 25a and the screw hole 60 formed in the first bottom surface 61 are substantially the same, and the screw 10 is inserted into the hole 27 and the screw hole 60, whereby the leaf spring 9 is It is fixed to the outer radiating fin 45b.
The embossed portion 28 of the flat portion 25 b of the leaf spring 9 is fitted in the fixing hole 17 of the leg portion 56 of the power supply unit 2 at the second bottom surface 62.
The flat portion 25 c of the leaf spring 9 is pressed against the first bottom surface 61 by the urging force of the leaf spring 9.

  Thus, since the leaf spring 9 is fixed with the screw 10 in the recess 47, when the leg portion 56 is pulled out from the slit 46, the leaf spring 9 floats along the inclination of the embossed portion 28, and the leg portion 56. Is configured to be hooked on the embossed portion 28 of the leaf spring 9 fitted in the fixing hole 57. Since the leg portion 56 is fixed to some extent by the embossed portion 28 of the leaf spring 9, the power supply unit 42 cannot be easily detached from the illumination unit 41, but has a force to pull the power supply unit 42 out of the illumination unit 41 in parallel with the slit 46. When added, the embossed portion 28 is detached from the fixing hole 57 of the leg portion 56. Therefore, the user can remove the power supply unit 42 from the lighting unit 41 only by applying a force for pulling out the power supply unit 2 without removing the leaf spring 9 from the concave portion 47, and conversely, the leg portion 56 is made into the slit 46. When inserting, the embossed portion 28 fits into the fixing hole 57 of the leg portion 56 by applying a force enough to lift the leaf spring 9, so that the leg portion 56 can be easily inserted into the slit 46. It can be easily attached to the lighting unit 41.

  As described above, since the power supply unit 42 can be easily attached to or detached from the illumination unit 41 in the same manner as the illumination device 100 of the first embodiment, the size of the space behind the ceiling of the enforcement place It can be set as the illuminating device 200 with good workability according to.

  The present invention can be used for a lighting device having a heat radiation fin and a power supply unit.

1, 41 lighting unit,
2, 42 Power supply unit,
3 Wiring,
4 Substrate storage part
5, 45 Heat sink,
5a, 45a Inside radiating fins,
5b, 45b outer radiating fins,
6, 46 slits,
7, 47 recess,
8 Leaf spring for mounting,
9 Leaf spring,
10 screws,
15 cases,
16, 56 legs,
17, 57 fixing holes,
18 Power connector,
20 LED elements,
21 reflector,
22 reflective surface,
23 Mounting frame,
25a, 25b, 25c plane part,
26a, 26b inclined part,
27 holes,
28 Embossing part,
30, 60 screw holes,
31, 61 first bottom surface,
32, 62 second bottom surface,
100, 200 Lighting device.

Claims (4)

A substrate provided with a light emitting element on the surface;
A heat sink that is attached to the back surface of the substrate and transfers heat generated from the light emitting element to dissipate heat into the air. The heat sink has a plurality of fins and is disposed on the outermost side among the plurality of fins. A heat sink with slits formed in it,
A power supply unit having a leg portion that can be inserted into the slit and supplying a current to the light emitting element;
A lighting device comprising: The lighting device according to claim 1, wherein the slit is formed in parallel with the substrate. The lighting device according to claim 1, wherein the slit is formed in parallel with the fin. A hole is formed in the leg,
A leaf spring having a protrusion that fits into the hole;
A fixing member for fixing the leaf spring to the heat sink with the legs inserted in the slit;
An illumination device according to any one of claims 1 to 3.

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