JP5691664B2 - lighting equipment - Google Patents

Description

  The present invention relates to a lighting fixture attached to a ceiling surface.

  2. Description of the Related Art In recent years, with the practical use of LEDs, lighting fixtures that are attached to a ceiling surface are known that employ LEDs as light sources. Further, in this type of lighting fixture, a technique for reducing the height of the lighting fixture by arranging a lighting circuit board for lighting the LED so as to be substantially parallel to the ceiling surface has been proposed (for example, Patent Document 1).

JP 2008-262714 A

However, in a luminaire that incorporates a power supply board that turns commercial LEDs into direct current power to turn on the LEDs, the power supply board generates heat, and it is difficult to simply reduce the thickness of the luminaire. In particular, as the number of LEDs constituting the light source increases and the luminous flux of the LEDs increases, the current flowing through the power supply substrate increases, so the problem of heat generation becomes more prominent.
This invention is made | formed in view of the situation mentioned above, and it aims at providing the lighting fixture which ensures the heat dissipation of a power supply board and enables thickness reduction.

In order to achieve the above object, according to the present invention, in a lighting fixture attached to a ceiling surface, the fixture main body is partitioned into a ceiling side and a floor side by a partition wall, and an LED substrate is attached to the partition wall and stored in a room on the floor side. The LED power supply board is housed in the ceiling-side room, the outer wall of the ceiling-side room is provided with fins, and the outer wall of the floor-side room has a flange shape surrounding the floor-side room A rotating shaft that engages with a bearing of a mounting bracket provided on the ceiling side at one end of the instrument body, and a hooking portion that engages with the mounting bracket at the other end. The terminal box provided on the side is provided with the mounting bracket, the mounting bracket is provided with an opening through which wiring is passed between the terminal box and the instrument body, and a seal member is provided between the terminal box and the mounting bracket. The seal member is provided with the mounting bracket. A seal portion that is inserted into the opening to seal between said terminal box and the instrument body, characterized in that it comprises integrated.

  According to the present invention, in the lighting device, the room on the ceiling side is sized to accommodate the power supply board in parallel to the partition wall and to have an inner wall close to the power supply board.

  According to the present invention, the appliance main body is divided into the ceiling side and the floor side by the partition wall, the LED substrate is attached to the partition wall and stored in the floor side chamber, and the LED power supply board is stored in the ceiling side chamber. A power supply board and LED will be arrange | positioned up and down with respect to a ceiling surface, and an instrument main body will be thinned. Furthermore, since the fins are provided on the outer wall of the ceiling-side room, the heat generated by the power supply substrate stored in the ceiling-side room can be efficiently radiated from the fins on the outer wall to the surroundings. In addition to this, since the LED substrate is attached to the partition wall, the heat generated by the LED can be transmitted to the fixture body through the partition wall to dissipate to the surroundings, and a thin lighting fixture with good heat dissipation can be obtained.

It is the perspective view which looked at the lighting fixture which concerns on embodiment of this invention from the lower side. It is a figure which shows the structure of a lighting fixture, (A) is a front view, (B) is a right view, (C) is a left view, (D) is a top view, (E) is a bottom view. It is AA sectional drawing of FIG.2 (C). It is an exploded view of a lighting fixture. It is a perspective view of an instrument main body. It is a perspective view of a mounting bracket. It is the perspective view which looked at the lighting fixture which concerns on the modification of this invention from the lower side.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, an example of a lighting fixture installed on the ceiling surface of a warehouse for refrigeration and cold storage, which is a warehouse of a scale in which a work vehicle for carrying goods such as a forklift, etc. comes and goes.

FIG. 1 is a perspective view of the installation state of the lighting fixture 1 according to the present embodiment as viewed from below. 2A and 2B are diagrams illustrating a configuration of the lighting fixture 1. FIG. 2A is a front view, FIG. 2B is a right side view, FIG. 2C is a left side view, and FIG. FIG. 2 and FIG. 2E are bottom views. FIG. 3 is a cross-sectional view taken along the line AA in FIG. FIG. 4 is an exploded view of the luminaire 1.
As shown in FIG. 1, the lighting fixture 1 is installed by being attached to an existing terminal box 2 on the ceiling surface. The terminal box 2 serves as a mounting base for the lighting fixture 1 and supplies commercial power to the lighting fixture 1. The terminal box 2 includes a thin cylindrical box main body 3. The fixed leg 4 is provided, and the fixed leg 4 is firmly fixed to the ceiling surface with a bolt or the like so as to withstand the load of the lighting fixture 1.

As shown in FIG. 3, an opening 5 for drawing a commercial power line is provided on the outer peripheral surface of the box body 3, and a lighting fixture is provided at the approximate center of the bottom surface (floor side surface) of the box body 3. An opening 7 for drawing one power line into the box body 3 is provided. The power lines drawn from the openings 5 and 7 are connected in the box body 3, and commercial power is supplied to the lighting fixture 1.
In addition, the outer peripheral surface of the box body 3 is provided with openings 5 in four directions, and is configured so that a power line can be drawn from an appropriate opening 5 and a feed wiring to another lighting fixture 1 can be drawn. The unused opening 5 is closed with, for example, a rubber material.

  As shown in FIGS. 1 to 4, the lighting fixture 1 includes a box-like fixture body 10 that is thin in the height direction from the ceiling surface, and the ceiling surface side is attached to the terminal box 2 and faces the floor side. On the bottom surface, a globe 12 having a rectangular shape as a transparent plate is fitted and fixed to the instrument body 10. A waterproof packing 14 (FIGS. 3 and 4) is sandwiched between the globe 12 and the instrument body 10 so as to be airtight.

FIG. 5 is a perspective view of the instrument body 10.
The instrument body 10 is formed into a thin box shape having a rectangular shape in plan view by aluminum die casting using an aluminum alloy which is an example of a metal material having high thermal conductivity, and the outer wall 10A on each side has a height direction (ceiling surface side). A large number of fins 16 extending in the direction from the floor to the floor are integrally formed.
Further, as shown in FIG. 3, the interior of the appliance body 10 is partitioned into a power board storage chamber 20 on the ceiling surface side and an LED storage chamber 22 on the floor side by a partition wall 18 parallel to the ceiling surface. A power supply unit 30 including a power supply substrate 24 is accommodated in the power supply substrate storage chamber 20, and an LED substrate 28 on which a large number of LEDs 26 are mounted is accommodated in the LED storage chamber 22.

  As shown in FIG. 3, the power supply board 24 included in the power supply unit 30 is mounted with a power supply circuit that supplies lighting power to each of the LEDs 26, and is formed in a substantially rectangular shape in plan view. The partition wall 18 is accommodated substantially in parallel. Electrical circuit components are provided on both sides of the power supply board 24. A relatively tall electrical circuit component is provided on the surface 24A facing the ceiling side, and a short electrical circuit component is provided on the floor side surface 24B. It has been.

  The power supply substrate storage chamber 20 is formed by a recess having a substantially rectangular shape in plan view and a rectangular cross section provided in the instrument body 10, and the bottom surface of the recess serves as the partition wall 18. Bases 32 are provided at the four corners of the partition wall 18 in plan view, and the power supply substrate 24 is placed on each base 32 and fixed with screws. The height of the pedestal 32 is formed as low as possible so that the electric circuit components provided on the floor-side surface 24B of the power supply substrate 24 do not contact the partition wall 18, and the power supply substrate storage chamber 20 The height (depth) H1 is as small as possible so that the electric circuit component provided on the ceiling-side surface 24A of the power supply board 24 does not contact the flat lid 34 that closes the power supply board storage chamber 20. Is formed. The power supply unit 30 including the power supply board 24 includes an insulating sheet 35 between each electric circuit component on both sides of the power supply board 24, the partition wall 18, and the lid body 34. While ensuring insulation, the distance between each electric circuit component and the partition wall 18 and the lid 34 can be shortened. Thereby, the instrument main body 10 can be made compact by minimizing the height of the power supply substrate storage chamber 20.

  The lid 34 closes the power supply substrate storage chamber 20 of the instrument body 10 with a waterproof packing 36 interposed therebetween, and an opening 37 for drawing out the power line is provided at the approximate center of the lid 34. A resin-made bush 38 is fitted in. The packing 36 and the bush 38 ensure the airtightness of the power supply substrate storage chamber 20.

  The power supply substrate storage chamber 20 is sized so that the inner wall 20A is close to the power supply substrate 24 so that there is a slight gap δ when the power supply substrate 24 is arranged substantially parallel to the partition wall 18. Thus, the instrument main body 10 can be made compact without causing an extra space even in the horizontal direction. However, the width dimension W of the power supply substrate 24 is set to a minimum size that can ensure the electrical insulation distance α between the electric circuit component and the inner wall 20A.

  As described above, a large number of fins 16 are provided on the outer wall 10 </ b> A of the instrument main body 10, and these fins 16 are provided on the outer wall 10 </ b> A located outside the power supply substrate storage chamber 20. Since the power supply substrate 24 is fully accommodated in the power supply substrate storage chamber 20, the heat generated by the power supply substrate 24 is efficiently transmitted to the fins 16 through the inner wall 20 </ b> A of the power supply substrate storage chamber 20. Sex is obtained.

  Similar to the power supply substrate storage chamber 20, the LED storage chamber 22 is formed by a recess having a substantially rectangular shape in plan view and a rectangular cross section, and the bottom surface of the recess serves as the partition wall 18. A communication hole 18A for connection between the power supply substrate 24 of the power supply substrate storage chamber 20 and the LED substrate 28 is provided substantially at the center of the partition wall 18, and a large number of LEDs 26 are arranged on the partition wall 18 in, for example, a lattice shape. The LED board 28 is directly mounted and fixed with screws, and is connected to the power supply board 24 through the communication hole 18A. As described above, since the LED board 28 is directly attached to the partition wall 18, the heat generated by the LED 26 is efficiently transmitted to the instrument body 10 through the partition wall 18, and the heat dissipation performance is improved.

The height (depth) of the LED storage chamber 22 is set to the minimum height H2 at which the globe 12 that closes the LED storage chamber 22 does not interfere with the mounted components of the LED substrate 28.
Thus, in the appliance main body 10, since the heights H1 and H2 of the power supply substrate storage chamber 20 and the LED storage chamber 22 are minimized, the thickness of the appliance main body 10 can be reduced. The width from the surface can be suppressed. In particular, the lighting fixture 1 is used for lighting of warehouses where work vehicles such as forklifts come and go, so that the width of the projecting from the ceiling surface can be suppressed. Can be prevented.

  Further, in the instrument main body 10, as shown in FIG. 3, the fins 16 on the outer wall 10 </ b> A are limited to the range of the height H <b> 1 of the power supply substrate storage chamber 20, and on the LED storage chamber 22 side, the LED storage chamber 22. Meat remains in a flange shape that surrounds the flange portion 39, and this flange-shaped portion 39 functions as a heat mass that receives the heat generated by the LED 26, thereby further improving heat dissipation.

  Here, the LED storage chamber 22 is closed by the globe 12, but in order to prevent the inside of the globe 12 from being fogged due to moisture or the like, the instrument body 10 has an LED as shown in FIG. A vent passage 40 for connecting the storage chamber 22 to the outside is provided, and a cap 41 with a filter that prevents moisture from entering and has air permeability is attached to the outer end 40A of the vent passage 40.

Next, the mounting structure to the terminal box 2 will be described.
As shown in FIG. 3, a mounting bracket 50 is screwed to the bottom surface of the box body 3 of the terminal box 2. As shown in FIG. 6, the mounting bracket 50 is provided with an opening 51 (FIG. 3) on the bottom surface of the box body 3 and an opening 51 through which the wiring between the terminal box 2 and the instrument body 10 passes. It is a substantially horizontally long plate material, and a U-shaped bearing 52 is formed at one end in the longitudinal direction, and a latch receiver 53 is formed at the other end.
As shown in FIGS. 3 and 4, a sealing member 61 is sandwiched between the mounting bracket 50 and the box body 3 of the terminal box 2 for sealing. The seal member 61 is integrally formed with a cylindrical packing 60 as a seal portion that is fitted and inserted into the opening 51 of the mounting bracket 50 and seals a wiring portion between the terminal box 2 and the instrument body 10.
Thereby, only by attaching the instrument main body 10 to the mounting bracket 50, the cylindrical packing 60 automatically seals the space between the terminal box 2 and the instrument main body 10, and the installation work is facilitated.

  On the other hand, in the lighting fixture 1, as shown in FIG. 5, a pair of support pieces 70 are provided on one surface of the outer wall 10 </ b> A of the fixture body 10, and the support pieces 70 make a rod-like rotation shaft 71 ( 3 and 4) are supported. In addition, a latch mechanism 75 is provided on the surface of the outer wall 10 </ b> A of the instrument main body 10 that is engaged with the latch receiver 53 of the mounting bracket 50 on the surface facing the support piece 70.

Under such a configuration, when the lighting fixture 1 is attached to the mounting bracket 50, the pivot shaft 71 of the lighting fixture 1 is hooked on the U-shaped bearing 52 of the mounting bracket 50, and then the pivot shaft 71 is centered. The instrument body 10 is rotated to attach the latch mechanism 75 to the latch receiver 53 of the mounting bracket 50.
Thereby, for example, the lighting fixture 1 can be easily attached to the existing terminal box 2 only by fixing the mounting bracket 50.

As described above, according to the present embodiment, in the luminaire 1 attached to the ceiling surface, the fixture body 10 is partitioned into the power board storage chamber 20 on the ceiling side and the LED storage chamber 22 on the floor side by the partition wall 18. The LED board 28 is attached to the partition wall 18 and stored in the LED storage chamber 22 on the floor side, and the power supply board 24 of the LED 26 is stored in the power supply board storage chamber 20 on the ceiling side.
Thereby, the power supply board 24 and LED26 will be arrange | positioned up and down (height direction) with respect to a ceiling surface, and the instrument main body 10 can be reduced in thickness. Furthermore, since the fins 16 are provided on the outer wall 10A of the power supply board storage chamber 20 on the ceiling side, heat generated by the power supply board 24 housed in the power supply board storage chamber 20 on the ceiling side can be efficiently transmitted from the fins 16 on the outer wall 10A to the periphery. It can dissipate heat. In addition to this, since the LED board 28 is attached to the partition wall 18, the heat generated by the LED 26 can be transmitted to the fixture body 10 through the partition wall 18 and can be dissipated to the surroundings. can get.

Further, according to the present embodiment, the power supply substrate storage chamber 20 on the ceiling side is sized such that the power supply substrate 24 is stored parallel to the partition wall 18 and the inner wall 20 </ b> A is close to the power supply substrate 24.
As a result, the power supply substrate 24 is fully accommodated in the power supply substrate storage chamber 20, and the heat generated by the power supply substrate 24 is efficiently transmitted to the fins 16 through the inner side wall 20 </ b> A of the power supply substrate storage chamber 20. Thus, the instrument body 10 can be made compact.

Moreover, according to this embodiment, the rotation shaft 71 that engages with the bearing 52 of the mounting bracket 50 provided on the ceiling side is provided at one end of the instrument body 10, and the other end serves as a hooking portion that engages with the mounting bracket 50. The latch mechanism 75 is provided.
Thereby, attachment of the lighting fixture 1 to the attachment metal fitting 50 becomes easy. Furthermore, the lighting fixture 1 can be easily attached to the existing terminal box 2 by fixing the mounting bracket 50 to the existing terminal box 2.

Further, according to the present embodiment, the mounting bracket 50 is provided in the terminal box 2, and the opening 51 through which wiring is passed between the terminal box 2 and the instrument body 10 is provided in the mounting bracket 50. 50, a seal member 61 is provided, and the seal member 61 is inserted into the opening 51 of the mounting bracket 50, and a cylindrical packing 60 as a seal portion that seals between the terminal box 2 and the instrument body 10 is integrated. To prepare for.
Thereby, only by attaching the instrument main body 10 to the mounting bracket 50, the cylindrical packing 60 automatically seals the space between the terminal box 2 and the instrument main body 10, and the installation work is facilitated.

The above-described embodiment is merely an aspect of the present invention, and can be arbitrarily modified and applied without departing from the spirit of the present invention.
For example, in the above-described embodiment, the globe 12 of the lighting fixture 1 has a flat plate shape. However, the present invention is not limited thereto, and may be a dome-shaped globe 112 as shown in FIG.
In addition, for example, in order to efficiently transmit heat of the power supply substrate 24 and the electric circuit components to the fins 16, an insulating sheet between the substrate and the partition wall 18 may be configured by a heat conductive member.
Further, for example, the entire power supply substrate storage chamber 20 may be filled with a heat conductive insulating material to further improve heat dissipation.
Further, for example, in the above-described embodiment, the luminaire 1 may be used by being attached to an indoor wall surface instead of the ceiling surface.

DESCRIPTION OF SYMBOLS 1 Lighting fixture 2 Terminal box 10 Appliance main body 10A Outer side wall 12, 112 Globe 16 Fin 18 Partition wall 20 Power supply board storage room 20A Inner side wall 22 LED storage room 24 Power supply board 26 LED
28 LED board 30 Power supply unit 34 Cover 35 Insulating sheet 39 Flange-shaped part 50 Mounting bracket 60 Cylindrical packing 61 Seal member 70 Support piece 71 Rotating shaft 75 Latch mechanism (engagement part)

Claims (2)

In the lighting fixture attached to the ceiling surface,
The main body of the appliance is divided into a ceiling side and a floor side by a partition wall, the LED board is attached to the partition wall and stored in the floor side room, the LED power supply board is stored in the ceiling side room, and the ceiling side room Fins are provided on the outer side wall, and the outer wall of the floor-side chamber is integrally provided with a flange-like portion surrounding the floor-side chamber ,
One end of the instrument body is provided with a rotation shaft that engages a bearing of a mounting bracket provided on the ceiling side, and the other end is provided with a hooking portion that is hooked with the mounting bracket.
The mounting bracket is provided in the terminal box provided on the ceiling side, the mounting bracket is provided with an opening through which wiring is passed between the terminal box and the instrument body,
A seal member is provided between the terminal box and the mounting bracket, and the seal member is integrally provided with a seal portion that is inserted into the opening of the mounting bracket and seals between the terminal box and the instrument body. Characteristic lighting equipment.   The lighting apparatus according to claim 1, wherein the ceiling-side chamber is sized to accommodate the power supply board in parallel with the partition wall and an inner wall is close to the power supply board.

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