JP2015130285A - Led illumination device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent oil from infiltrating through the inside of a power cable in an LED illumination device.SOLUTION: An LED illumination device includes: a device body (10) incorporating a light source and a circuit board (15) for performing lighting drive of the light source, and having an irradiation surface for radiating light of the light source to the outside; mounting means (20A, 20B) for mounting the device body on various devices and a wall surface and a ceiling of a building; and a power cable (30) in which one end is mounted on the device body. At a wall body of the device body, an insertion part in which the power cable is inserted is provided. In the vicinity of the insertion part in the device body, relay means (17) is provided for connecting a core wire of an inner cord (18) for a power source connected to the circuit board and a core wire of the power cable, and an oil absorber (oil absorbing material) having electrical insulation properties and curability is adhered so as to cover an upper part of the relay means.

Description

  The present invention relates to a lighting device, and more particularly to a technique effective when applied to a lighting device using an LED as a light source.

  2. Description of the Related Art In recent years, lighting devices using LEDs as light sources have become widespread, and LED lighting devices are used as lighting devices for facilitating visual recognition of the workpiece machining state even in factories that perform cutting and the like. In factory LED lighting equipment, the air in the factory contains oil mist, dust, etc., so transparent glass or frosted glass covering the case that houses the LED-mounted substrate and the light-irradiating surface is used. By interposing a seal member such as packing between the glass frame to be held, oil or dust in the air is prevented from entering the case.

JP 2013-45582 A

However, even in the LED lighting device in which the seal member is interposed between the storage case and the glass frame, oil enters the case and the silver layer provided on the surface of the LED mounting substrate is corroded, and sulfide is generated. Problems such as being generated may occur.
When the present inventors investigated the cause, in the LED lighting apparatus for factories, the outer end part of the power cable (VCT cable) for supplying power to the lighting apparatus is connected to the power panel provided in the facility. In order to connect to the terminal, the sheath covering the outside is removed at the end of the cable, and the ends of the two cords on the plus side and the minus side are exposed. When the LED is turned on, the air inside the case expands due to heat generation, and when it is turned off, the air contracts and the case has a sealed structure. It was found that the oil moves through the gap and the gap between the cord and the sheath and enters the case of the lighting device.

  Conventionally, as a technique related to the above-mentioned problem, there is an invention provided with a structure for preventing water from entering the inside of the main body from the outside due to a breathing action associated with turning on / off the LED in the LED lighting device (Patent Document). 1). However, the invention described in Patent Document 1 is to prevent water from entering from a connection portion between the internal power supply line and the external power supply line when water is present around the lighting device. Thus, the entry of water is prevented by providing an air reservoir in the connecting portion, and as will be apparent from the following description, the problem and the means for solving it are different from the present invention.

  This invention is made | formed in view of the above situations, and it aims at preventing that oil penetrate | invades through the inside of a power cable in an LED lighting apparatus.

  In order to achieve the above object, the present invention provides a device main body having a light source and a circuit board for driving and driving the light source and having an irradiation surface for irradiating the light of the light source to the outside, and the device main body as various devices and buildings. In the LED lighting device comprising an attachment means for attaching to the wall surface and ceiling of the apparatus and a power cable having one end attached to the apparatus body, an insertion portion through which the power cable is inserted is provided in the wall body of the apparatus body. A relay means for connecting a core wire of the power supply internal cord connected to the circuit board and a core wire of the power supply cable is provided in the vicinity of the insertion portion in the apparatus main body; An oil absorbing material having electrical insulating properties and curability was applied so as to cover the upper portion of the means.

  According to the above-mentioned means, the expansion / contraction (breathing action) of the air inside the apparatus main body accompanying the lighting / extinguishing of the light source enters through the gap between the cord and the cord inside the power cable and the gap between the cord and the sheath. The coming oil can be blocked by an oil absorbing material (oil absorbing material) deposited so as to cover the upper part of the relay means, and the oil can be prevented from reaching the circuit board and corroding the silver layer or the like.

Here, an outflow prevention wall for preventing the oil absorbing material from spreading outside a predetermined range when the oil absorbing material is injected in a liquid state is formed around the arrangement portion of the relay means of the apparatus main body. It is good to configure.
Thereby, the oil absorbing material (oil absorbing material) can be injected evenly between the products, and the occurrence of unevenness in the thickness of the deposited oil absorbing material layer can be avoided. Further, by adjusting the size of the region (concave portion) surrounded by the outflow prevention wall, the amount of the oil absorbing material filled in the concave portion can be set according to the use environment.

Desirably, the outflow prevention wall is formed with engagement portions that can be engaged with the internal cord for power supply at a predetermined interval.
By providing the engaging portion on the outflow prevention wall and engaging the internal cord for power supply, it is possible to prevent the internal cord from becoming messy and improve the assembly workability.

Further, the relay means is a relay board on which a plurality of conductor layers capable of electrically connecting the core wire of the power supply internal cord and the core wire of the power cable are formed at a predetermined interval. You may do it.
As a result, the ends (soldering portions) of the plurality of core wires of the power supply internal cord connected to the relay board and the ends (soldering portions) of the plurality of core wires of the power cable are separated by an arbitrary distance. Can be connected. Further, by using the relay substrate, the connecting portion between the core wire of the power supply internal cord and the core wire of the power cable can be easily covered with the oil absorbent.

Further, the attachment means comprises a pair of attachment fittings that are supported from both side portions of the apparatus main body, the attachment fittings are provided with support portions that rotatably support both side portions of the apparatus main body, It is good to comprise so that it may insert in the said apparatus main body from a support part.
With such a configuration, the direction of the irradiation surface of the apparatus main body can be arbitrarily adjusted, and the direction of the irradiation surface can be adjusted without being obstructed by the power cable.

  According to the present invention, in the LED lighting device, there is an effect that oil can be prevented from entering through the inside of the power cable.

It is a perspective view which shows one Example of the LED lighting apparatus which concerns on this invention. It is a perspective view which shows the structural example of the LED mounting substrate of the LED lighting apparatus which concerns on this invention. It is a cross-sectional perspective view of the LED lighting apparatus cut | disconnected along the AA line of FIG. It is a figure which expands and shows the part enclosed with the dashed-dotted line B in FIG. It is a figure which expands and shows the site | part by which the board | substrate for relay of the concave chamber bottom wall is arrange | positioned. It is a figure which shows the process of coat | covering the upper part of the board | substrate for relay arrange | positioned in the concave chamber with resin.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing an embodiment of an LED lighting device according to the present invention, and shows a light projection surface made of transparent glass or frosted glass on the upper side.
The LED lighting device according to the present embodiment is a pair of box-shaped device main body 10 having one open surface and a device for mounting the device main body 10 on a wall surface or a ceiling surface of the building. L-shaped mounting brackets 20A and 20B, and a power cable 30 having one end attached to the apparatus main body 10.

A front panel 12 that holds a translucent plate 11 such as transparent glass or frosted glass is joined to an opening surface (upper surface in FIG. 1) of the apparatus main body 10 and is fixed by a plurality of screws 13.
Although not shown in FIG. 1, a sealing material 19 (see FIG. 6) such as packing is inserted in a joint portion between the peripheral portion of the translucent plate 11 and the apparatus main body 10. The oil mist and dust in the air around the device are prevented from entering.

The mounting bracket 20A includes a mounting surface 20a that is joined to a wall surface or a ceiling surface, and a holding surface 20b that is perpendicular to the mounting surface 20a and is joined to a side surface of the apparatus body (case) 10. In the center, there is provided a case support portion 20c made of a cylindrical rib formed so as to protrude toward the inside of the case (rightward in FIG. 1). In addition, a pair of guide holes 20d are formed in the holding surface 20b so as to face each other with the case support portion 20c interposed therebetween. The guide hole 20d is formed to have an arc shape along a part of a circle centered on the support portion 20c.
The mounting bracket 20B joined to the opposite side surface (right side surface in FIG. 1) of the apparatus main body 10 has the same structure as the mounting bracket 20A and is formed to have a symmetrical shape. Description is omitted.

  Although not shown, on both side surfaces of the apparatus main body 10, fitting portions are formed to be fitted to the case support portions 20 c of the holding surfaces 20 b of the mounting brackets 20 A and 20 B, respectively. Is rotatably supported. Further, the screw portions of the tightening screw 14 are inserted into the guide holes 20d of the mounting brackets 20A and 20B, respectively, and the screw ends are screwed into screw holes (not shown) formed on both side surfaces of the apparatus main body 10, respectively. Has been. As a result, the tightening screw 14 is loosened, the device body 10 is rotated and tilted about the case support 20c, the angle of the light projecting surface is adjusted, and then the tightening screw 14 is tightened to change the direction of illumination. It is configured so that it can be set arbitrarily.

FIG. 2 shows a configuration example of the LED mounting substrate 15 housed inside the apparatus main body 10.
The LED mounting board 15 of this embodiment is a printed wiring board, and a wiring pattern made of a conductive layer is formed on the back surface of the board, and is fixed in the housing recess of the apparatus main body 10 by four screws. .
Further, in the LED mounting board 15 of the present embodiment, as shown in FIG. 2, six LED lamps 51 are provided in a staggered arrangement, and the supply of power from the power cable 30 is received. An electronic component 52 such as an IC (semiconductor integrated circuit), a resistance element, and a capacitor constituting a circuit for generating a drive current for lighting the LED lamps 51 is mounted. Although not particularly limited, the LED lamp 51 and the electronic component 52 are mounted only on the upper surface side of the substrate in this embodiment.

  FIG. 3 is a cross-sectional view of the LED lighting device of the embodiment cut along the line AA in FIG. As shown in FIG. 3, a housing recess 10a is formed on the opening surface side (upper surface side in FIG. 1) of the apparatus main body 10, and the LED mounting substrate 15 is fixed on the bottom wall of the housing recess 10a. Yes. An opening is formed in the center of the holding surface 20b of the mounting bracket 20B, and a metal support sleeve 21 is fitted into the opening to constitute a case support portion that supports the side portion of the apparatus main body 10.

  In addition, a recessed chamber 10b is provided at the bottom of the housing recess 10a of the apparatus body 10 and below the LED mounting substrate 15, and a relay substrate 17 is disposed on the bottom wall of the recessed chamber 10b. As shown in FIG. 4 in an enlarged manner, the power cable 30 is inserted into the support sleeve 21 fitted to the holding surface 20b of the mounting bracket 20B. An insertion hole 10c is formed so that the end of the power cable 30 inserted through 21 can be inserted into the concave chamber 10b.

  Although not shown, a seal member is interposed between the support sleeve 21 through which the power cable 30 is inserted and the inner peripheral surface of the insertion hole 10c. It is configured to prevent water, oil, dust and the like from entering. Further, a male screw is formed on the outer peripheral surface of the outer end (right side in FIG. 4) of the support sleeve 21, and a fitting for securing a cable (not shown) is screwed to the male screw and tightened. Thus, water, oil, dust or the like can be prevented from entering between the inner peripheral surface of the support sleeve 21 and the outer peripheral surface of the power cable 30.

  Further, a relay for connecting the core wire 30a of the power cable 30 and the core wire 18a of the power supply internal cord 18 connected to the LED mounting board 15 to a portion near the insertion hole 10c of the concave chamber 10b. A substrate 17 is provided. A wiring pattern 17 a for electrically connecting the core wire 30 a of the power cable 30 and the core wire 18 a of the internal cord 18 is formed on the relay substrate 17. The core wire 30a of the power cable 30 is soldered to one end of the wiring pattern 17a, and the core wire 18a of the internal cord 18 is soldered to the other end of the wiring pattern 17a. In addition, although the cord of the power supply cable 30, the internal cord 18, and the wiring pattern 17a are provided two each, FIG. 4 shows the state of connection of one of them.

  Furthermore, as shown in FIG. 5, ribs 10d and 10d are formed so as to sandwich the relay substrate 17 at a portion of the bottom wall of the concave chamber 10b where the relay substrate 17 is disposed. A stepped portion 10e is formed on the bottom wall of the concave chamber 10b from the terminal end (left end in the drawing) of the relay substrate 17 toward the center of the apparatus, and 2 on the upper surface of the stepped portion 10e. Engaging grooves 10f and 10f for guiding the inner cord 18 of the book to a predetermined part of the relay substrate 17 are formed at a predetermined interval. By providing the engaging grooves 10f and 10f on the upper surface of the stepped portion 10e, the internal cord 18 can be prevented from becoming messy.

As shown in FIGS. 6A to 6C, the side surfaces of the ribs 10d and 10d and the stepped portion 10e are electrically insulated and oil-absorbing epoxy resin, silicon resin, and silicon rubber from above the relay substrate 17. When oil-absorbing material (oil-absorbing material) M such as is poured, it functions as an outflow prevention wall (wall body) for preventing the oil-absorbing material M from spreading outside the substrate. The oil absorbing material M used in the present embodiment is a curable material, and after flowing a fluid liquid material so as to cover the upper side of the relay substrate 17, the oil absorbing material M is cured by being left for a predetermined time or more. be able to.
By providing the rib 10d and the step portion 10e functioning as an outflow prevention wall as described above, the oil absorbing material can be injected evenly between the products, and the thickness of the deposited oil absorbing material layer is uneven. Can be avoided. Further, by adjusting the size of the region (concave portion) surrounded by the outflow prevention walls (10d, 10e), the amount of oil absorbing material filled in the concave portion can be set according to the use environment.

In the LED lighting device before the present invention is applied, the end portion of the power cable inserted from the insertion hole in the side wall portion of the device body 10 is directly extended to the LED mounting substrate, and the core wire of the power cable is directly mounted on the LED. It was soldered to a predetermined part of the substrate.
On the other hand, in the LED lighting device of this embodiment, the power cord 30 is connected to one end of the wiring pattern of the relay substrate 17 and the other end of the wiring pattern is connected to the LED mounting board 15. 18 core wires are connected, that is, the end portion of the power cable is once cut and the relay board 17 is interposed, and the power cable 30 is indirectly connected to the LED mounting board 15.
With this configuration, oil that enters through the gap between the plus side cord and the minus side cord of the power cable 30 and the gap between the cord and the sheath covering the cable is covered above the relay substrate 17. It can be absorbed by the oil absorbing material M, thereby preventing the oil from reaching the LED mounting substrate 15 and corroding the silver layer provided on the substrate surface.

  That is, in the LED mounting substrate 15 of this embodiment, the lead terminals of the LED lamp 51 and the electronic component 52 are inserted into through holes formed in the printed wiring board, and the end portions of the lead terminals protruding to the opposite side are subjected to solder flow processing. A single-sided mounting board is mounted by soldering to the board. By setting it as a single-sided mounting board, a cheaper board | substrate can be obtained compared with a double-sided mounting board. The LED lamps 51 mounted on the LED mounting board 15 may be arranged in two rows instead of being arranged in a staggered manner. Further, the number of LED lamps to be mounted is not limited to six, and may be twelve or any other number.

  Although the invention made by the present inventor has been specifically described based on the embodiment, the present invention is not limited to the embodiment. For example, in the above-described embodiment, the configuration in the case of using a two-core power cable is shown. However, three parallel wiring patterns are formed on the relay substrate 17 and a cord is provided on the bottom wall of the concave chamber 10b. Three engaging grooves for guiding may be provided so that a three-core power cable can be used.

  Further, in the above-described embodiment, the step portion 10e extending from the inner end of the portion where the relay substrate 17 is disposed to the opposite side of the apparatus is provided, and the two inner cords 18 are guided on the upper surface thereof. Although the joint grooves 10f and 10f are provided, instead of providing the stepped portion 10e, a rib that continues the ribs 10d and 10d is provided at the end position of the stepped portion 10e, and the inner cords 18 and 18 are provided at the upper ends of the ribs. Notches that can be engaged may be provided at predetermined intervals. By providing a notch at the upper end of such a rib, it is possible to prevent the internal cord 18 from becoming messy and improve the assembly workability.

Further, in the embodiment, the power cable 30 and the internal cord 18 connected to the LED mounting board 15 are connected via the relay board 17 on which the conductive layer pattern is formed. As long as the wire and the core of the internal cord 18 can be connected, the relay means may have any configuration.
Moreover, in the said embodiment, although the oil absorbing material is adhere | attached so that the whole upper part of the soldering part of the board | substrate 17 for relays may be covered, an oil-absorbing material is halfway in the storage recessed part which has arrange | positioned the board | substrate 17 for relays. It is good also as a structure which put in and put the curable resin layer so that the surface may be covered.

Furthermore, in the above-described embodiment, the power cable 30 is inserted from the support portion (sleeve) that rotatably supports the apparatus main body 10. However, the power cable is inserted into the apparatus main body from a portion other than the support shaft. You may comprise as follows.
In the embodiment, the metal support sleeve 21 into which the power cable 30 is inserted is fitted to the side wall portion of the apparatus body 10. However, a grommet is used instead of the sleeve 21. You may do it.
Furthermore, although the said embodiment demonstrated what applied this invention to the illuminating device which used LED as the light source, this invention can be utilized also for the illuminating device etc. which used the incandescent lamp as the light source.

DESCRIPTION OF SYMBOLS 10 Device main body 11 Translucent plate 12 Front panel 15 LED mounting board 18 Internal code 17 Relay board (relay means)
10d, 10d rib (wall)
20A, 20B Mounting bracket 30 Power cable

Claims (5)

An apparatus main body having a light source and a circuit board for driving and driving the light source and having an irradiation surface for irradiating the light of the light source to the outside, and an attachment means for attaching the apparatus main body to the walls and ceiling of various devices and buildings And an LED lighting device including a power cable having one end attached to the device main body,
An insertion portion through which the power cable is inserted is provided on the wall of the apparatus main body, and a core wire of a power supply internal cord connected to the circuit board and the power supply are provided in the vicinity of the insertion section in the apparatus main body. An LED lighting device, characterized in that a relay means for connecting to a cable core is provided, and an oil-absorbing material having electrical insulation and curing properties is attached so as to cover the relay means. .   An outflow prevention wall for preventing the oil absorbing material from spreading outside a predetermined range when an oil absorbing material is injected in a liquid state is formed around the arrangement portion of the relay means of the apparatus main body. The LED lighting device according to claim 1.   The LED lighting device according to claim 2, wherein an engagement portion capable of engaging with the power supply inner cord is formed on the outflow prevention wall at a predetermined interval.   The relay means is a relay board on which a conductor layer capable of electrically connecting the core wire of the power supply internal cord and the core wire of the power supply cable is formed. LED lighting device in any one of.   The mounting means is composed of a pair of mounting brackets that are supported from both sides of the apparatus main body, and the mounting bracket is provided with a support part that rotatably supports both side parts of the apparatus body, and the power cable is connected to the support part. The LED illumination device according to claim 1, wherein the LED illumination device is configured to be inserted into the device main body.

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