JP2017107879A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device capable of improving insulation performance between a part having the same electrical potential as the ground potential and a charging part.SOLUTION: A lighting device includes: an attachment member 41 having an attachment portion 41a and insulation properties; a metal case 42 which is formed in a box shape with a bottom wall 42a, both side walls 42b and both end walls 42c, which is disposed at the substantially center of the attachment member 41 and which is attached to the attachment member 41 with a predetermined insulation distance L in the width direction from both the side walls 42b toward the attachment portion 41a in a substantially uniform manner; and a power supply circuit 43 having a printed wiring board 44 accommodated in the case 42, and a circuit component 45 mounted on the printed wiring board 44.SELECTED DRAWING: Figure 4

Description

  Embodiments described herein relate generally to a lighting device that can improve insulation performance.

  2. Description of the Related Art Conventionally, for example, a lighting device used outdoors such as a crime prevention light or a street light sometimes has a main body that is an outer shell made of a metal material from the viewpoint of ensuring durability and strength. In addition, a case that is mounted in the main body and houses a power supply circuit that controls lighting of the light source may be formed of a metal material. When a metal material is used for the main body of these lighting devices, it is necessary to ground from the viewpoint of safety. When the lighting device whose main body is formed of a metal material is grounded, a surge voltage caused by lightning or the like is generated between a portion having the same potential as the ground potential and the charging portion.

  Therefore, it is necessary to ensure insulation performance that can withstand lightning surge between a portion having the same potential as the ground potential and the charged portion. For example, it may be necessary to secure a predetermined distance between the case and the wiring pattern on the printed circuit board that constitutes the power supply circuit in order to ensure insulation performance against high voltage due to lightning surges, etc. There is a problem that the range in which the wiring pattern is formed, that is, the layout of the wiring pattern is limited.

  For this reason, it is known that an insulating sheet is provided on the upper and lower surfaces of the power supply circuit in order to avoid the limitation of the layout of the wiring pattern and to ensure the insulation performance.

JP 2010-108879 A

  However, in the configuration as described above, insulation performance is insufficient with respect to a high voltage due to a lightning surge or the like, and when a high voltage is applied to a charging part, for example, a metal case, the case is a charging part. There is a risk that an overvoltage is applied to the circuit component and the circuit component is destroyed.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an illuminating device that is excellent in heat dissipation even when miniaturized.

  An illumination device according to an embodiment of the present invention includes a metal device main body having an opening; a globe attached to cover the opening of the device main body; a mountain shape having inclined surfaces on both sides; A metal attachment member attached to the opening side; a light source portion disposed on the globe side surface of the attachment member and provided with a plurality of light emitting elements; and disposed in the main body on the back side of the attachment member And a power supply circuit provided.

  According to the embodiment of the present invention, it is possible to provide an illuminating device capable of stably holding a power supply circuit by suppressing deformation of the illuminating device even when used for a long time. Furthermore, while the light emitting element is turned on, heat is generated from the light emitting element. However, it is possible to provide a lighting device that can transmit heat from the light emitting element that is turned on to the fixture side and dissipate heat.

It is a perspective view which shows the illuminating device which concerns on the 1st Embodiment of this invention. It is a disassembled perspective view which removes and shows a glove in the illumination device. It is a perspective view which removes and shows a glove in the illumination device. It is sectional drawing which follows the YY line in FIG. 3 in the same illuminating device. It is a top view which shows a power supply device seeing from the back side. It is a side view which shows the state which attached the lighting device to the utility pole. It is a disassembled perspective view which shows the power supply device which concerns on the 2nd Embodiment of this invention. FIG. 5 is a cross-sectional view corresponding to FIG. 4.

  A first embodiment of the present invention will be described below with reference to FIGS. In the present embodiment, a security light is shown as the lighting device. The security light is used to be installed on a utility pole on a road, a pole in a park, an outer wall of a factory, etc., and mainly ensures the safety of pedestrians.

  FIG. 1 is a perspective view showing a security light, and FIG. 2 is an exploded perspective view showing a glove removed.

FIG. 3 is a perspective view with the globe removed. 4 is a cross-sectional view, and FIG. 5 is a plan view showing the power supply device as viewed from the back side. Moreover, FIG. 6 is a side view which shows the state which attached the security light to the utility pole. In addition, the same code | symbol is attached | subjected to the same part in each figure, and the overlapping description is abbreviate | omitted.

  The security light includes a device main body 1, a globe 2, a light source unit 3, and a power supply device 4. The apparatus main body 1 is made of a metal material, for example, is made of aluminum die casting, is formed in a substantially ship shape having an opening at the bottom, and is provided with a light source unit 3, a power supply device 4, and an automatic flasher described later. ing. Further, four mounting bosses 11 for mounting the power supply device 4 and other mounting bosses are erected integrally on the back side of the inner peripheral surface of the apparatus main body 1.

  As shown in FIGS. 2 to 4, a substantially mountain-shaped metal mounting plate 12 having inclined surfaces on both sides is attached to the opening side of the apparatus body 1 so as to protrude toward the opening side. The light source unit 3 is attached to the inclined surface of the mounting plate 12. The mounting plate 12 may be configured as a reflecting plate.

  The globe 2 is formed in a substantially ship shape with an upper part opened so as to cover the lower opening of the apparatus main body 1. The front end side of the globe 2 is connected to the apparatus main body 1 by a hinge 21 so as to be opened and closed, and the rear end side is screwed.

  As shown in FIGS. 1 and 4, the globe 2 is made of a light-transmitting material such as acrylic resin, and prisms made of a plurality of protrusions are integrally formed on both sides of the inner surface in the longitudinal direction. Has been. The prism is formed so that ridge lines are continuous in the longitudinal direction, and has a function of refracting light emitted from the light source unit 3 and distributing light mainly in the lateral direction (direction perpendicular to the longitudinal direction). Yes.

  The light source unit 3 includes a substrate 31 and a plurality of light emitting elements 32 mounted on the substrate 31. A lens member formed of a transparent material such as an acrylic resin (not shown) having a lens portion formed so as to face each light emitting element 32 is arranged on the front side of the substrate 31. .

  The substrate 31 is formed in a substantially rectangular shape, and is made of a flat plate of a glass epoxy substrate (FR-4) or a glass composite substrate (CEM-3) which is an insulating material, and a wiring formed of copper foil on the surface side. A pattern is formed. In addition, as a material of the substrate 31, a ceramic material or another synthetic resin material can be applied when an insulating material is used. Furthermore, when it is made of metal, a metal base substrate in which an insulating layer is laminated on one surface of a base plate having good thermal conductivity such as aluminum and excellent heat dissipation can be applied.

  Such a substrate 31 is attached to the inclined surfaces on both sides of the mounting plate 12 by fixing means (not shown).

  The light emitting element 32 is an LED, which is a surface mount type LED package. Schematically, it consists of an LED chip placed on the body made of ceramics or heat-resistant synthetic resin, and a translucent resin for molding such as epoxy resin or silicone resin that seals the LED chip Has been.

  The LED chip is a blue LED chip that emits blue light. In the translucent resin, a phosphor is mixed, and in order to be able to emit white light, a yellow phosphor that emits yellow light that is complementary to blue light is used. Yes.

  The LED may be a bullet-type LED, and the mounting method and format are not particularly limited.

  Further, it is preferable to form a white resist layer over the entire surface of the substrate 31. This resist layer acts as a reflection layer, and can reflect light directed toward the surface of the substrate 31 out of light emitted from the light emitting element 32 to the front side, and effectively emit light emitted from the light emitting element 32. Can be used.

  The power supply device 4 is connected to a commercial AC power supply AC by a power supply line, and receives the AC power supply AC to generate a DC output.

  The power supply device 4 is configured, for example, by connecting a smoothing capacitor between output terminals of a full-wave rectifier circuit, and connecting a DC voltage conversion circuit and current detection means to the smoothing capacitor. Therefore, the power supply device 4 is connected to the light source unit 3 by a wiring connection member such as a lead wire, and supplies the direct current output to control the lighting of the light source unit 3. Two power supply devices 4 may be provided corresponding to each substrate 31.

  As shown in FIGS. 2, 4 and 5, such a power supply device 4 is disposed on the back side of the mounting plate 12, and has an insulating mounting member 41 and a metal box-like shape. A case 42 and a power circuit 43 accommodated in the case 42 are provided. The power supply circuit 43 includes a printed wiring board 44 and a circuit component 45 mounted on the printed wiring board 44.

  The attachment member 41 is formed of a plate-shaped synthetic resin material having insulating properties, and has a substantially rectangular shape. The mounting member 41 has predetermined heat resistance and durability. Specifically, a bakelite plate is used.

  The attachment member 41 is formed with four screw holes 41a corresponding to the attachment bosses 11 standing on the back side of the apparatus main body 1 as attachment parts to the apparatus main body 1, and for attaching the case 42. Two screw holes 41b are formed.

  The case 42 is formed in a box shape by bending a metal flat plate. For example, a steel plate material is used, and is formed by being bent into a box shape including a bottom wall 42a, a pair of side walls 42b along the longitudinal direction, and a pair of both end walls 42c. Therefore, an opening 42d is formed on the surface facing the bottom wall 42a.

  Further, on the side of the opening 42d in the both end walls 42c, mounting pieces 42e are formed so as to protrude diagonally in the outer peripheral direction. The case 42 is attached to the attachment member 41 by screwing the attachment piece 42e into the screw hole 41b of the attachment member 41 with an attachment screw (see FIG. 5).

  Further, locking claws 42f for locking the printed wiring board 44 to the case 42 are formed at a plurality of locations near the bottom wall 42a in the side walls 42b.

  The printed wiring board 44 is formed in a substantially rectangular shape, and a wiring pattern made of copper foil is formed on the surface. The printed wiring board 44 is a switching element such as a capacitor, a winding component or a transistor, or an input / output device. Circuit components 45 necessary for configuring the power supply circuit 43 such as a terminal block are mounted.

  Such a power supply circuit 43 is accommodated in the case 42. Specifically, the peripheral edge of the printed wiring board 44 is locked and attached to the locking claw 42 f of the case 42.

  Further, as representatively shown in FIGS. 4 and 5, the case 42 is disposed and attached to a substantially central portion of the attachment member 41. Furthermore, the attachment member 41 is configured such that a screw hole 41a as an attachment portion is attached to correspond to the attachment boss 11.

  In this state, a predetermined insulation distance L in the width direction from the both side walls 42b of the case 42 toward the screw hole 41a as the attachment site is secured. That is, since the attachment member 41 has insulation, it is configured so that an insulation distance L from the metal attachment boss 11 at the ground potential to the both side walls 42b of the metal case 42 is ensured. Yes. Specifically, the insulation distance L is ensured to be 10 mm or more, and the insulation distances L from the mounting bosses 11 to the respective side walls 42b are set substantially equally.

  According to such a configuration, the attachment member 41 has an insulating property, and since a predetermined insulation distance L can be secured between the case 42 and the attachment boss 11, the insulation performance can be improved. It becomes possible. For this reason, the insulation distance between the case 42 and the printed wiring board 44 or the metal part can be relaxed, and, for example, the charging part in the printed wiring board 44, that is, the range in which the wiring pattern is formed is limited. Therefore, it is possible to increase the degree of freedom of layout in forming the wiring pattern.

  In addition, the case 42 is disposed substantially at the center of the mounting member 41, and the insulation distance L from the mounting boss 11 to the side walls 42b is set to be substantially equal. And the weight of the case 42 is applied substantially evenly. Therefore, even when used for a long period of time, it is possible to hold the power supply circuit 43 stably in strength by suppressing the deformation of the mounting member 41.

  Furthermore, since the power supply device 4 is mounted on the back side of the mounting plate 12 formed in a substantially mountain shape, the power supply device 4 can be disposed using a recessed space formed by the substantially mountain shape. It can be expected that the apparatus main body 1 is miniaturized.

  For example, as shown in FIG. 6, the security light configured as described above is fixed by wrapping and fixing the rear wall portion of the apparatus main body 1 around a power pole 6 standing on a road via an attachment band 5. Mounted at a height of about 5m.

  In the security light installed in this way, the switch of the automatic flasher is automatically turned on when the outdoors becomes dark, power is supplied to the light source unit 3 from the power supply side via the power supply device 4, and the light emitting element 32 is turned on. . Further, when the outdoors becomes bright, the switch of the automatic flasher is automatically turned off, and the light emitting element 32 is turned off.

  In the lighting state of the security light, the light emitted from the light emitting element 32 passes through a lens member (not shown), passes through the translucent globe 2 and is emitted outward. More specifically, the light emitted from the light emitting element 32 is refracted to the side by the prisms formed on both side surfaces in the longitudinal direction of the globe 2 and is blown in the traveling direction of the road to irradiate the traveling direction of the road. . Moreover, from the center part in the longitudinal direction of the globe 2, it is blown directly downward and irradiates the downward direction. Therefore, the traveling direction and the direct downward direction of the road are effectively irradiated.

  On the other hand, heat is generated from the light emitting element 32 while the light emitting element 32 is lit. This heat is transmitted to the substrate 31 and is conducted from the back side of the substrate 31 to the mounting plate 12 to be dissipated.

  Further, for example, even if a high voltage due to a lightning surge or the like is applied to the apparatus main body 1, an insulation distance L is secured between the case 42 and the mounting boss 11 by the mounting member 41. It is possible to prevent the circuit component 45 from being applied to 45 and being destroyed.

  As described above, according to the present embodiment, the insulation performance can be improved, the circuit component 45 can be prevented from being destroyed by an overvoltage, and the degree of freedom in layout in forming the wiring pattern on the printed wiring board 44 can be increased. It becomes possible to raise.

  Further, it is possible to hold the power supply circuit 43 stably in strength by suppressing deformation of the mounting member 41 having insulating properties.

  Next, a second embodiment of the present invention will be described with reference to FIGS. FIG. 7 is an exploded perspective view mainly showing the power supply device 4, and FIG. 8 is a cross-sectional view showing a security light. In addition, the same code | symbol is attached | subjected to the part which is the same as that of 1st Embodiment, or an equivalent, and the overlapping description is abbreviate | omitted.

  In the present embodiment, the entire periphery of the power supply circuit 43 is surrounded by a bent insulating sheet 46. The power circuit 43 surrounded by the insulating sheet 46 is accommodated in the case 42. The attachment member 41 is made of a metal material.

  The insulating sheet 46 is formed of an electrical insulating material such as a polyester film, and is formed into a box shape having six surfaces by bending one sheet. The insulating sheet 46 has a bottom surface portion 46a, both side surface portions 46b, both end surface portions 46c, and an upper surface portion 46d. Further, a bent step portion 46e is formed at the connection portion between the bottom surface portion 46a and the both side surface portions 46b, and a flap 46f is connected to the front edge portion of the upper surface portion 46d.

  Thus, the power supply circuit 43 is accommodated in the insulating sheet 46 formed in a box shape. In this case, as shown in FIG. 8, the periphery of the printed wiring board 44 is supported by the bent step portion 46e. Accordingly, the power supply circuit 43 is housed in the case 42 so that the entire periphery is surrounded and covered by the six surfaces of the insulating sheet 46. For this reason, the power supply circuit 43 can ensure insulation performance with a simple configuration.

  Furthermore, it is preferable to fill an insulating resin R such as a silicone resin into a gap formed between the outer peripheral surface of the insulating sheet 46 and the inner peripheral surface of the case 42. This makes it possible to further improve the insulation performance.

  As described above, according to the present embodiment, it is possible to improve the insulation performance and suppress the destruction of the circuit component 45 due to overvoltage.

  In addition, although the attachment member 41 in this embodiment uses the thing formed with the metal material, you may use the thing formed with the synthetic resin material which has insulation similarly to 1st Embodiment. In this case, further improvement in insulation performance can be expected.

  The present invention is not limited to the configuration of the embodiment described above, and various modifications can be made without departing from the spirit of the invention. For example, the light source is not limited to an LED, but may be an HID lamp, a fluorescent lamp, or the like.

  Moreover, as an illuminating device, it is not restricted to what is used outdoors, You may use it indoors. It can be applied to various lighting devices used outdoors or indoors.

DESCRIPTION OF SYMBOLS 1 ... Apparatus main body, 2 ... Globe, 3 ... Light source part, 4 ... Power supply device, 31 ... Board | substrate, 32 ... Light emitting element (LED), 41 ... Mounting member, 41a: Mounting part (screw hole), 42: Case, 42a: Bottom wall, 42b ... Side wall, 42c ... End wall, 43 ... Power supply circuit, 44 ... Printed wiring Substrate, 45 ... circuit components, 46 ... insulating sheet, L ... insulating distance

Claims (1)

A metal device body having an opening;
A glove attached to cover the opening of the device body;
A metal mounting member having a mountain shape with inclined surfaces on both sides and attached to the opening side of the apparatus main body;
A light source portion provided on the globe side surface of the mounting member and provided with a plurality of light emitting elements;
A power supply circuit disposed in the main body on the back side of the mounting member;
An illumination device comprising:

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