JP2013033689A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting fixture than can surely secure electric insulation while attaining miniaturization and simply assembling an electric circuit board at low cost.SOLUTION: The lighting fixture 1 includes a fixture body 10 having a power source storage part 24 for closing an opening 31 with a cover 32, wherein the power source circuit board 41 related to lighting-up of a light source is stored in the power source storage part 24, and a board support 42 formed with an insulative sheet S having electric insulation and flexibility and retained between the cover 32 and a board support setting surface 57 of the power source storage part 24 by being pressed by closing of the cover 32. The board support 42 supports both side edges 41A of the power source circuit board 41, and retains the power source circuit board 41 at a position separated from the cover 32 and the board support setting surface 57.

Description

  The present invention relates to a lighting fixture incorporating an electric circuit board.

  In recent years, with the practical application of LEDs, lighting fixtures that employ LEDs as light sources are known. This type of lighting fixture normally includes an electric circuit board on which various electric circuits such as an LED power supply circuit and a lighting circuit are mounted. In general, the electric circuit board is built in the lighting fixture by placing the electric circuit board in a case body made by processing a sheet metal and fixing the case body in the lighting fixture. However, when a sheet metal case body is used, it is necessary to provide a large electrical insulation distance between the electric circuit board and the case body, and at the same time the case body becomes large, the instrument main body to be built in also becomes large. Therefore, in order to keep the insulation distance to the minimum required size, a method of attaching an insulating sheet between a substrate and a case made of sheet metal is generally implemented. Further, instead of using a sheet metal case body, there is known a lighting fixture in which an electric circuit board is attached to the installation surface of the lighting fixture with a resin unit case lid with an insulating sheet interposed therebetween (for example, Patent Document 1).

JP 2008-262714 A

  However, when an electrical circuit board is attached to the installation surface of a lighting fixture using a sheet metal case body, electrical components cannot be mounted on the installation surface side of the electrical circuit board, so single-sided mounting is required, and the electrical circuit board is enlarged. Therefore, there is a problem that the built-in instrument body is also enlarged. In addition, in order to reduce the size of an electric circuit board, it is possible to integrate IC chips, capacitors, resistors, and other components on a single board to make a hybrid. There was a problem that it was not suitable.

  The present invention has been made in view of the above-described circumstances, and provides a lighting apparatus that can ensure electrical insulation while realizing downsizing and can incorporate an electric circuit board easily and at low cost. The purpose is to provide.

  In order to achieve the above-mentioned object, the present invention has a substrate storage portion that closes an opening with a lid, an instrument body that houses an electric circuit board related to light source lighting in the substrate storage portion, electrical insulation, And a substrate support that is formed from a flexible insulating sheet and is held in a bent state between the lid and the substrate support mounting surface of the substrate storage unit by being pressed by the lid of the lid And the board support supports both side edges of the electric circuit board, and the electric circuit board is held at a position separated from the lid and the board support installation surface. A lighting apparatus is provided.

  According to the present invention, in the above-described lighting fixture, the side edge of the electric circuit board is inserted and supported on a side surface of a cylindrical body portion formed by winding or bending the insulating sheet around the electric circuit board. The substrate support is configured by providing a slit.

  Moreover, the present invention is characterized in that in the above-mentioned lighting fixture, a fixing piece is provided for extending one end portion of the insulating sheet from the cylindrical body portion and fixing the cylindrical body portion to the substrate support body installation surface. To do.

According to the present invention, it is formed of an insulating sheet having electrical insulation and flexibility, and is pressed by the lid of the lid to bend between the lid and the substrate support mounting surface of the substrate storage unit. A substrate support that is held in an open state, the substrate support supports both side edges of the electric circuit board, and the electric circuit board is positioned away from each of the lid and the substrate support mounting surface. It was set as the structure hold | maintained.
According to this configuration, since the electric circuit board is held at a position separated from each of the lid and the board support surface, the circuit components can be mounted on both surfaces of the electric circuit board. Increase in size can be prevented.
In addition, since the insulating sheet constituting the substrate support is interposed between the board storage portions at both ends of the electric circuit board, the distance between both ends of the electric circuit board and the board storage portion can be reduced. The lighting fixture can be miniaturized.
Furthermore, since the substrate support is held and fixed in the substrate housing portion by closing the lid, it is easy to incorporate the electric circuit board into the lighting fixture.
Since this board | substrate support body is formed from the insulating sheet, compared with the structure which uses sheet metal, a board | substrate support body can be comprised simply and at low cost.

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 top view, (B) is a front view, (C) is a bottom view. It is sectional drawing of a lighting fixture. It is a bottom view of the state which removed the cover from the instrument main body. It is a figure which shows the structure of a board | substrate support body typically, (A) is a perspective view which shows a board | substrate support body typically, (B) is an expanded view of a board | substrate support body. It is the schematic which shows the state which accommodated the board | substrate support body in the power supply accommodating part of the instrument main body. It is a figure which shows the modification of a board | substrate support body, (A) shows the case where a cylinder part is a triangular prism shape, (B) shows the case where a cylinder part is a hexagonal column shape, (C) shows a cylinder part. The case of a cylindrical shape is shown. It is a figure which shows the other modification of a board | substrate support body, (A) shows the structure by which a board | substrate support body is provided with a pair of support piece, (B) is the structure which connected the pair of support piece of the board | substrate support body by the upper surface. Indicates.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, a lighting device installed on the ceiling surface of a warehouse or factory is illustrated, but the present invention is not limited to this type of lighting device.

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 the configuration of the lighting fixture 1, in which FIG. 2A is a plan view, FIG. 2B is a front view, and FIG. 2C is a bottom view. FIG. 3 is a cross-sectional view of the lighting fixture 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.

An opening 5 for drawing a commercial power line is provided on the outer peripheral surface of the box body 3, and the power line of the luminaire 1 is connected to the box body 3 at a substantially center of the bottom surface (floor side surface) of the box body 3. An opening (not shown in the figure) is provided to be pulled in. A power line drawn from the opening 5 on the outer peripheral surface of the box body 3 and the opening on the bottom surface is connected in the box body 3, and commercial power is supplied to the lighting device 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 FIG. 1 and FIG. 2, the lighting fixture 1 includes a thin cylindrical fixture body 10 in a height direction from the ceiling surface, the ceiling surface side is attached to the terminal box 2, and the surface is facing 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 (FIG. 3) is sandwiched between the globe 12 and the instrument body 10 so as to be airtight and moisture-proof.

  As shown in FIG. 3, the instrument body 10 is provided with a hook shaft 70 for attaching to the terminal box 2 and a latch mechanism 75. That is, as shown in FIGS. 1 and 2, a mounting bracket 50 having a bearing 52 that receives the hook shaft 70 and a latch receiver 53 that engages the latch mechanism 75 on the bottom surface of the box body 3 of the terminal box 2. The instrument main body 10 is attached to the terminal box 2 by hooking the hook shaft 70 and engaging the latch mechanism 75 with the mounting bracket 50.

  The instrument body 10 is formed in a circular shape in plan view by aluminum die casting using an aluminum alloy which is an example of a metal material having high thermal conductivity. That is, the instrument body 10 includes an annular frame portion 21 that forms an irradiation opening 20 as shown in FIGS. 1 and 2C. As shown in FIG. 3, a body portion 23 having a substantially box-shaped power storage portion 24 formed at the center is provided on the back side of the annular frame portion 21. A large number of fins 16 extending in the height direction (from the ceiling surface side to the floor side direction) are integrally formed on the outer surface 23 </ b> A of the body portion 23 over the entire circumference.

As shown in FIG. 3, the body portion 23 is integrally provided with a flat plate portion 30 so as to close the irradiation opening 20 side of the power storage portion 24. As shown in FIG. 1, the surface on the irradiation opening 20 side of the flat plate portion 30 is used as an LED substrate mounting surface 56, and the LED substrate 28 on which a large number of LEDs 26 as light sources are mounted on the LED substrate mounting surface 56. Is fixed with screws.
The power storage unit 24 has an opening 31 formed on the bottom surface side of the body part 23, and a plate-like lid 32 that closes the opening 31 of the power storage part 24 is fixed to the bottom surface of the body part 23 with screws. ing.

FIG. 4 is a bottom view of the instrument body 10 with the lid 32 removed.
A power supply circuit board 41 on which a power supply circuit 40 (FIG. 3) that supplies power to the LED board 28 and is lit is mounted in the power supply storage section 24 and is wrapped in a board support body 42 so that the board support body of the flat plate section 30 is installed. It is fixed to the surface 57.
As shown in FIG. 3, a wiring lead hole 30A is provided in the plane of the flat plate part 30 facing the power storage part 24, and the wiring extending from the power circuit board 41 is supplied through the wiring lead hole 30A. It is pulled out from the part 24 and connected to the LED substrate 28.
As shown in FIG. 3, the lid 32 closes the opening 31 of the power storage unit 24 with a waterproof packing 36 interposed therebetween, and a power line opening 37 is provided at the approximate center of the lid 32. A resin bush 38 is fitted into the power line opening 37. The packing 36 and the bush 38 ensure the airtightness of the power storage unit 24.
From the power line opening 37, a power line extending from the terminal box 2 is drawn into the power supply housing 24 and connected to the power circuit board 41.
The power supply circuit board 41 is formed in a substantially rectangular shape in plan view, is separated from each of the flat plate portion 30 and the lid body 32, and is a substrate support 42 configured in a case shape in a state of being substantially parallel to each. Is held in the power storage unit 24.

The substrate support 42 will be described in detail below.
FIG. 5 is a diagram schematically showing the structure of the substrate support 42, FIG. 5A is a perspective view schematically showing the substrate support 42, and FIG. 5B is a development view of the substrate support 42. is there.
As shown in FIG. 5 (B), the substrate support 42 is formed from a strip-shaped insulating sheet S made of a resin having electrical insulation and flexibility, and as shown in FIG. 5 (A). In addition, a substantially quadrangular columnar cylinder portion 43 formed by bending the insulating sheet S is provided, and the power circuit board 41 is supported inside the cylinder portion 43.
The support structure of the power supply circuit board 41 will be described in detail. Slits 55 are respectively formed on the left and right side surfaces 44 of the cylindrical body 43, and the left and right side edges 41A of the power supply circuit board 41 are formed in the respective slits 55. Is inserted, the power supply circuit board 41 is supported in the cylindrical portion 43. At this time, the power supply circuit board 41 has gaps δ1 and δ2 between the upper surface 45 and the lower surface 46 of the cylindrical portion 43 so that the power supply circuit 40 (not shown in FIG. 5) can be interposed therebetween. The slit 55 is provided at a position to be supported at the opened position. Thereby, the power supply circuit 40 and circuit components of other circuits can be arranged by effectively using both sides of the power supply circuit board 41.

  Since the insulating sheet S supports the power circuit board 41 on the left and right side surfaces 44, a sheet having sufficient rigidity to support the power circuit board 41 is used. However, the insulating sheet S is not limited to a single sheet, and the substrate support 42 may be configured by bending a plurality of stacked insulating sheets S.

FIG. 6 is a schematic view showing a state in which the substrate support 42 is housed in the power supply housing portion 24 of the instrument body 10.
As shown in the figure, the height La of the cylindrical portion 43 of the substrate support 42 is equal to the height Lb of the power storage portion 24 (ie, from the substrate support mounting surface 57 of the power storage portion 24 to the lid 32). Distance). Therefore, when the substrate support 42 is placed on the substrate support mounting surface 57 of the power storage unit 24 and the opening 31 of the power storage unit 24 is closed with the lid 32, the substrate support 42 is used by the lid 32. Is pressed in the height direction. Thereby, the side surfaces 44 on both the left and right sides of the cylindrical body portion 43 are crushed and bent, and the cylindrical body portion 43 is held and fixed in the power storage unit 24 by the stretching of the side surface 44 caused by this bending.

Therefore, the substrate support 42 can be fixed in the power supply housing 24 simply by placing the substrate support 42 supporting the power circuit board 41 in the power storage 24 and closing the lid 32. At this time, since the power supply circuit board 41 is supported in the cylindrical body portion 43, the flat plate portion 30, the lid body 32, the left and right side surfaces of the power supply storage portion 24, and the power supply circuit board 41 are interposed between them. As a result, the insulation sheet S is interposed, and electrical insulation between the power circuit board 41 and the power storage unit 24 is ensured. In other words, since electrical insulation can be obtained by the insulating sheet S, the distance between the power circuit board 41 and the power storage unit 24 can be shortened, the height Lb of the power storage unit 24 is suppressed, and the thickness is reduced. A small instrument body 10 can be configured.
In particular, by reducing the thickness of the instrument body 10, it is possible to suppress the width of the instrument body 10 from the ceiling surface. Therefore, work vehicles such as forklifts come and go, and the load lifted by the forklift is the instrument on the ceiling surface. The lighting fixture 1 can also be suitably used for lighting in a warehouse that is easily touched.

  Further, the height H (FIG. 3) from the substrate support installation surface 57 to the power circuit board 41 can be arbitrarily changed by changing the processing position of the slit 55 of the insulating sheet S (ratio of δ1 and δ2 with respect to La). For example, it is possible to increase the distance H from the substrate support installation surface 57 which is the back surface of the LED substrate mounting surface 56 to the power supply circuit substrate 41, thereby reducing the influence of heat between them. In addition to this, when the power storage unit 24 of the instrument main body 10 has a margin in the width direction (horizontal direction), it is possible to use a single-sided mounting board for the power supply circuit board 41 to further reduce the height. .

Here, when a shake or vibration in the left-right direction (horizontal direction) is applied to the instrument main body 10, the cylindrical body portion 43 may slide in the power storage portion 24. When such a slide movement occurs, the cylinder body 43 is unfolded due to friction between the substrate support 42 and the power storage unit 24 during the slide movement, pulling of the wiring extending from the power circuit board 41, or the like. There is a possibility that the insulating sheet S spreads in a band shape and the electrical insulation between the power circuit board 41 and the power storage unit 24 is not maintained.
Therefore, in the present embodiment, as shown in FIGS. 5 and 6, the fixing piece 47 for fixing the cylindrical portion 43 of the substrate support 42 to the substrate support mounting surface 57 of the power storage portion 24 with a screw is provided as a cylinder. By providing the body portion 43, the substrate support 42 is prevented from moving in the power storage portion 24 even when an impact is applied to the instrument body 10.

The fixing piece 47 is provided integrally with the cylindrical portion 43 as follows. That is, as described above, the cylindrical portion 43 is configured by bending the strip-shaped insulating sheet S into a cylindrical shape, and at one end portion of the insulating sheet S, as shown in FIG. 47 is formed in advance, and an insertion slit 48 into which the fixing piece 47 can be inserted is formed in advance at a portion constituting one side surface 44 of the cylindrical portion 43 of the insulating sheet S. And when this insulating sheet S is bent and the cylinder part 43 is comprised, the fixing piece 47 of an end part is inserted in the insertion slit 48, and is extended outside from the cylinder part 43, and the fixing piece 47 becomes a cylinder. It is configured integrally with the portion 43.
In such a configuration, since the fixing piece 47 formed by extending the end portion of the insulating sheet S wound in a cylindrical shape is screwed to the substrate support installation surface 57 of the power storage unit 24, an impact is applied to the instrument body 10. Even if it is pulled by the fixing piece 47 and the cylindrical cylindrical portion 43 is squeezed, or the side surface 44 of the cylindrical portion 43 moves to the fixing piece 47 side and is locked by the fixing piece 47 Therefore, the cylindrical body portion 43 is not unwound and does not expand (expand) into a belt shape, and the power supply circuit board 41 can be reliably stored in the cylindrical body portion 43.

  The substrate support 42 of the present embodiment is omitted in FIGS. 5 and 6, but as shown in FIG. Covering pieces 49A and 49B that cover the openings at both ends are provided integrally with the cylindrical body portion 43, thereby forming a box-shaped case for housing the power supply circuit board 41. Therefore, in the axial direction of the cylindrical body portion 43, since these cover pieces 49A and 49B provide electrical insulation between the power supply circuit board 41 and the power supply storage section 24, the power supply circuit board 41 and The distance between the power storage unit 24 and the instrument body 10 can be reduced by shortening the distance.

As described above, according to the present embodiment, the cover body 32 is pressed by the closure of the lid body 32 and is held in a bent state between the lid body 32 and the substrate support body installation surface 57 of the power storage unit 24. The substrate support 42 is formed from an insulating sheet S having electrical insulation and flexibility. The substrate support 42 supports both side edges 41A of the power circuit board 41, and the power circuit board 41 is covered with the lid 32. , And a position separated from the substrate support mounting surface 57.
With this configuration, the power supply circuit board 41 is held at a position separated from each of the lid 32 and the board supporter installation surface 57, so that circuit components can be mounted using both sides of the power supply circuit board 41 effectively. Therefore, the power circuit board 41 can be prevented from being enlarged.
In addition, the side edges 41A on both sides of the power circuit board 41 are provided with the insulating sheets S constituting the board support 42 between the power storage portions 24. Therefore, the side edges 41A on both sides of the power circuit board 41 are disposed. The distance between the power storage unit 24 and the instrument main body 10 can be reduced.
Furthermore, since the substrate support 42 is held and fixed to the power storage unit 24 by closing the lid 32, the work of assembling the power circuit board 41 into the instrument body 10 is facilitated.
Further, since the substrate support 42 is formed from the insulating sheet S, the substrate support 42 can be configured easily and at a lower cost than the configuration using sheet metal.

In addition, according to the present embodiment, the slit 55 that the side edge 41A of the power supply circuit board 41 is inserted and supported on the side surface 44 of the cylindrical body portion 43 formed by bending the insulating sheet S into a quadrangular column shape that wraps the power supply circuit board 41. A substrate support 42 was provided.
Thereby, the board | substrate support body 42 can be easily produced only by bending the insulating sheet S which laminated | stacked 1 or several sheets.
In addition to this, since the height H from the substrate support installation surface 57 to the power circuit board 41 can be arbitrarily set by changing the processing position of the slit 55 of the insulating sheet S, for example, the back surface of the LED substrate mounting surface 56 and It is also possible to increase the distance H from the substrate support mounting surface 57 to the power supply circuit board 41 to reduce the influence of heat between them.

Moreover, according to this embodiment, it was set as the structure which extends the one end part of the insulating sheet S from the cylinder part 43, and provides the fixing piece 47 which fixes the cylinder part 43 to the flat plate part 30. FIG.
With this configuration, even when an impact is applied to the instrument main body 10, the movement of the substrate support 42 within the power storage unit 24 can be prevented. Further, even if an impact is applied to the instrument body 10, the tubular body 43 is pulled by being pulled by the fixed piece 47, or the side surface 44 of the tubular body 43 is moved to the fixed piece 47 side. Since it is either locked by the fixing piece 47, the cylindrical portion 43 is not unwound and does not spread (expand) into a belt shape, and the power supply circuit board 41 is securely inserted into the cylindrical portion 43. Can be stored.

  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 case where the shape of the cylindrical portion 43 of the substrate support 42 is a quadrangular prism shape has been described, but the cross-sectional shape of the cylindrical portion 43 is not limited to a quadrangle. That is, as shown in FIG. 7A, the substrate support 142 may be provided with a triangular column-shaped cylindrical portion 143, and as shown in FIG. 7B, a hexagonal column-shaped cylindrical portion 243 is provided. Alternatively, the substrate support 242 may be used. That is, an arbitrary polygonal column shape can be used as the cylindrical body portion 43.
Furthermore, not only the polygonal column but also a substrate support 342 including a cylindrical cylindrical body 343 may be used as shown in FIG. Since the cylindrical cylindrical body portion 343 can be configured by only winding the periphery of the power supply circuit board 41 with the insulating sheet S, the substrate support 342 can be configured more easily.

In the above-described embodiment, the configuration including the cylindrical body portion 43 surrounding the power circuit board 41 as the substrate support 42 is illustrated, but the configuration is not limited thereto.
For example, as shown in FIG. 8A, slits 55 into which both side edges 41A of the power circuit board 41 are inserted are formed and pressed by the lid of the lid 32 to cover the lid 32 and the power storage unit 24. The substrate support 442 may be configured by including a pair of support pieces 444 that are held in a bent state between the substrate support installation surface 57 and the substrate support installation surface 57. In this configuration, each of the upper and lower end portions of the support piece 444 is bent outward to provide a contact piece 444A that contacts the lid 32 and the flat plate portion 30 and receives a pressing force. The substrate support 442 is held and fixed in the power storage unit 24 by the contact piece 444A being in close contact with the lid 32 and the flat plate part 30. Further, as shown in FIG. 8B, a pair of support pieces 544 may be connected by a rectangular upper surface 545 so that the upper surface 545 is pressed when the lid 32 is closed.

  In the above-described embodiment, the case where the substrate support 42 supports the power supply circuit board 41 is exemplified. However, not only the power supply circuit but also a lighting circuit, a control circuit, or various electric circuits in which these circuits are mixed are mounted. It can be used for supporting an electric circuit board.

DESCRIPTION OF SYMBOLS 1 Lighting fixture 10 Appliance main body 24 Power supply storage part 26 LED (light source)
28 LED board 30 Flat plate part 31 Opening 32 Cover body 40 Power supply circuit (electric circuit)
41 Power circuit board (electric circuit board)
41A Side edge 42, 142, 242, 342, 442, 542 Substrate support 43, 143, 243, 343 Cylindrical portion 44 Side surface 47 Fixed piece 48 Insertion slit 49A, 49B Cover piece 55 Slit 57 Substrate support installation surface 444 544 Support piece 444A Contact piece 544 Support piece La, Lb Height S Insulation sheet δ1, δ2 Gap

Claims (3)

An instrument body that has a substrate storage portion that closes the opening with a lid, and stores an electric circuit board related to light source lighting in the substrate storage portion,
It is formed from an insulating sheet having electrical insulation and flexibility, and is pressed between the lid and the substrate support section of the substrate storage unit in a state where it is bent by the lid of the lid. A substrate support to be held,
The said board | substrate support body supports the both-sides edge of the said electric circuit board, The said electric circuit board is hold | maintained in the position spaced apart from the said cover body and the said board | substrate support body installation surface.   The board support body is configured by providing a side wall of the cylindrical body portion formed by winding or bending the insulating sheet around the electric circuit board so as to insert and support side edges of the electric circuit board. The lighting fixture according to claim 1, wherein:   The lighting apparatus according to claim 2, wherein a fixing piece is provided to extend one end portion of the insulating sheet from the cylindrical body portion and fix the cylindrical body portion to the substrate support body installation surface.

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