JP2016178013A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device which can secure the insulation distance between a substrate and a housing, and with which improvement in heat radiation can be expected.SOLUTION: A lighting device 10 includes a housing 11 and a light source unit 12. The housing 11 includes an opening 35 at its bottom surface, and is provided with a substrate mounting part 46 at the inside of the opening part 35. The light source unit 12 includes: a substrate 20 formed into an outer shape smaller than the opening part 35; a light-emitting element 21 mounted on the substrate 20; and a power supply circuit 22 mounted on the substrate 20. The substrate 20 is mounted on the substrate mounting part 46 so as to cover the opening part 35 of the housing 11, and a clearance 51 is formed between an outside edge part of the substrate 20 and an inside edge part of the opening part 35 of the housing 11.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to a lighting device using a light emitting element.

  2. Description of the Related Art Conventionally, for example, in a lighting device such as a crime prevention light or a road light, a substrate on which a light emitting element is mounted is disposed on the lower surface of a housing, and a power circuit is often disposed in a space in the housing. Furthermore, the power supply circuit is often attached to the casing via an insulating member in addition to taking a certain insulation distance from the casing.

  In some cases, the light emitting element and the power supply circuit are mounted on one substrate in order to reduce the number of components.

  Lighting devices such as crime prevention lights and road lights used outdoors are subject to shrinkage or expansion due to the effects of cold and warm, so depending on the usage environment, the board and housing on which the power circuit is mounted There is a risk that the insulation distance will be insufficient.

  In addition, when the lower surface of the housing is blocked with a substrate, the air flow in the housing becomes difficult, which may affect the heat dissipation.

JP 2014-72106 A

  The problem to be solved by the present invention is to provide an illuminating device that can secure an insulation distance between a substrate and a housing and can be expected to improve heat dissipation.

  The lighting device of the embodiment includes a housing and a light source unit. The housing has an opening on the lower surface, and a substrate mounting portion is provided inside the opening. The light source unit includes a substrate provided in an outer shape smaller than the opening, a light emitting element mounted on the substrate, and a power supply circuit mounted on the substrate. The substrate is attached to the substrate attachment portion so as to cover the opening of the housing, and a gap is provided between the outer edge of the substrate and the inner edge of the opening of the housing.

  According to the present invention, the insulation distance between the substrate and the housing can be secured, the insulation distance can be maintained even if the substrate or the housing shrinks or expands due to cold and warm, and the air can flow through the gap. The improvement of sex can be expected.

It is sectional drawing of the illuminating device which shows one Embodiment. It is sectional drawing of an illuminating device same as the above. It is a perspective view of the decomposition | disassembly state seen from the downward direction of the illuminating device same as the above. It is the perspective view seen from the downward direction of the illuminating device same as the above. It is the perspective view seen from the upper direction of an illuminating device same as the above. It is the bottom view which removed the translucent cover of the illuminating device same as the above. It is a perspective view of the translucent cover of an illuminating device same as the above. It is a perspective view of the bushing of an illuminating device same as the above.

  Hereinafter, an embodiment will be described with reference to FIGS. 1 to 8.

  As shown in FIGS. 1 to 5, the lighting device 10 is a crime prevention light or a street light installed on, for example, a utility pole or a pole.

  The illuminating device 10 includes a housing 11, a light source unit 12, a lighting unit 13 and a bushing 14 incorporated in the housing 11, a translucent cover 15 attached to the lower surface of the housing 11, and the light source unit 12 and the translucent cover 15. A fire spread prevention sheet 16 or the like disposed therebetween is provided.

  First, the light source unit 12 will be described with reference to FIGS. 1 to 3 and FIG. The light source unit 12 includes a substrate 20, a plurality of light emitting elements 21 and a power supply circuit 22 mounted on the substrate 20, respectively.

  The substrate 20 is made of metal or made of an insulating material, and a wiring pattern is formed on the lower surface of the substrate 20. The substrate 20 is formed in a substantially rectangular shape, a light emitting element mounting region 23a is formed on one end side in the longitudinal direction, and a power circuit mounting region 23b is formed on the other end side. The dimensional relationship between the light emitting element mounting region 23a and the power circuit mounting region 23b in the longitudinal direction of the substrate 20 is such that the light emitting element mounting region 23a is smaller than the power circuit mounting region 23b, for example, 1: 2.

  A mounting hole 26 for fastening the substrate 20 to the housing 11 with a screw 25 is formed at one location in the approximate center of the light emitting element mounting region 23a and one location on the side in the width direction of the power circuit mounting region 23b. ing. A positioning hole 27 is formed at one place on the other side in the width direction of the power circuit mounting region 23b. An insertion hole 28 is formed at one end side of the mounting hole 26 at the center in the width direction of the light emitting element mounting region 23a.

  As the light emitting element 21, for example, an LED of an SMD (Surface Mount Device) package is used. The plurality of light emitting elements 21 are mounted on the light emitting element mounting region 23a on the lower surface of the substrate 20 and connected to the wiring pattern on the lower surface of the substrate 20. In the present embodiment, the plurality of light emitting elements 21 are arranged in two rows in the width direction of the substrate 20 and at predetermined intervals along the longitudinal direction of the substrate 20. In the case of an LED, the light emitting element 21 may be a COB (Chip On Board) module, or an EL (Electro Luminescence) element or the like.

  The power circuit 22 is mounted on the power circuit mounting region 23b of the substrate 20. The power supply circuit 22 has a plurality of electronic components 29. Among these electronic components 29, the lead component having the lead wire is arranged on the upper surface of the substrate 20, and the lead wire is inserted into the lower surface of the substrate 20 and connected to the wiring pattern, and the chip component is arranged on the lower surface of the substrate 20. Connected to the wiring pattern. The electronic component 29 includes an illuminance sensor 30 that is mounted on the upper surface of the substrate 20 and detects the brightness around the lighting device 10. The power supply circuit 22 converts AC power supplied from the outside into predetermined DC power, supplies the DC power to the light emitting element 21, and causes the light emitting element 21 to emit light. The light emitting element 21 is automatically controlled to be turned on and off so that the light emitting element 21 is turned on when the detected brightness is lower than the predetermined threshold and the light emitting element 21 is turned off when the detected brightness is higher than the predetermined threshold. .

  1 to 6 show the housing 11. The casing 11 is made of a metal such as aluminum, and has an upper surface portion 32 and a surrounding side surface portion 33. A space portion 34 is formed inside, and an opening portion 35 is formed on the lower surface on one side. Yes. An attachment portion 36 attached to, for example, a utility pole or a pole is integrally formed on the base end side of the housing 11. The casing 11 is formed in a shape that is long in the longitudinal direction from the proximal end side to the opposite distal end side.

  An annular groove 37 is formed around the lower surface of the housing 11, and an annular packing 38 is provided in the groove 37 to ensure waterproofness between the housing 11 and the translucent cover 15. Yes. Further, bosses 39a and 39b having screw holes for fastening and fixing the substrate 20 with screws 25 at one position in the center in the width direction on the front end side of the housing 11 and one position in the width direction on the base end side are respectively provided. A boss 40 that protrudes and has a positioning protrusion 40a into which the positioning hole 27 of the substrate 20 is fitted is protruded at one place on the other side in the width direction on the base end side. Furthermore, bosses 42a and 42b having screw holes for fastening the translucent cover 15 with screws 41 at one position in the center in the width direction on the front end side of the housing 11 and two positions on both sides in the width direction on the base end side. Are formed respectively. The boss 42a is inserted through the insertion hole 28 of the substrate 20.

  Inside the housing 11, there is a space at an intermediate position between the front end side and the base end side of the housing 11 and corresponding to a position between the light emitting element mounting area 23a and the power circuit mounting area 23b of the substrate 20. A partition portion 43 that protrudes into the portion 34 is formed. The partition portion 43 is formed in a wall shape along the width direction in the housing 11, and the space portion 34 in the housing 11 is divided into a light emitting element side space portion 34a on the front end side and a power circuit side space on the base end side. It is partitioned into part 34b.

  Inside the housing 11, a plurality of wall portions 44 and 45 projecting into the light emitting element side space 34 a along the longitudinal direction of the housing 11 are formed. In the present embodiment, a wall portion 44 on both sides in the width direction and a central wall portion 45 are provided. The wall portions 44 on both sides are formed along positions corresponding to the light emitting elements 21 mounted in two rows on the substrate 20, and the central wall portion 45 corresponds to the mounting hole 26 of the substrate 20. It is formed at a position corresponding to the boss 39a, 42a. A plurality of contact portions 44 a that come into contact with the substrate 20 are formed on the wall portions 44 on both sides corresponding to the positions of the light emitting elements 21 mounted on the substrate 20. The contact portion 44a is formed in a cylindrical shape having a diameter larger than the thickness of the wall portion 44. Boss 39a and 42a are integrally formed in the central wall 45, respectively.

  Inside the housing 11, a partition portion 43 and wall portions 44 and 45 are integrally formed. The bottom surfaces of the bosses 39a, 39b, 40, the partition portion 43, the wall portions 44, 45, and the like located inside the opening 35 of the housing 11 are formed in the same plane, and the substrate 20 is attached by contacting the top surface of the substrate 20 The mounting portion 46 is configured.

  A wiring hole 47 and a vent hole 48 are formed in the side surface portion 33 on the base end side of the housing 11. A protrusion 47 a is formed on the outer surface side of the wiring hole 47 so as to surround the periphery of the wiring hole 47. The vent hole 48 is closed by an internal pressure adjusting filter 48a that allows gas to pass and prevents liquid from passing.

  Although the upper surface portion 32 of the housing 11 is generally formed of a curved surface, a flat surface portion 49 is formed on the top of the upper surface portion 32, and a light extraction hole 50 communicating with the power circuit side space portion 34b is formed in the flat surface portion 49. Is formed.

  The maximum height of the light emitting element side space 34a from the inner surface of the housing 11 to the light emitting element mounting region 23a of the substrate 20 is the power circuit side space 34b from the inner surface of the housing 11 to the power circuit mounting region 23b of the substrate 20 The maximum height of is also low.

  The outer shape of the substrate 20 is smaller than the opening 35 of the housing 11, and in a state where the substrate 20 is fixed to the housing 11, the inner edge of the opening 35 (space 34) of the housing 11 A gap 51 is provided between the outer edge of the substrate 20. The gap 51 is about 0.5 mm, for example.

  1 and 3 show the daylighting unit 13. The daylighting unit 13 includes a light-transmitting daylighting window 54 fitted into the daylighting hole 50 via the packing 53, and guides the external light collected from the daylighting window 54 to the illuminance sensor 30 and the external light is supplied to the power circuit side space. A light-shielding cylinder 55 is provided to prevent discharge into the 34b.

Also, the bushing 14 is shown in FIGS. The bushing 14 is formed of an insulating and elastic material such as rubber. The bushing 14 is formed with a pair of wire insertion holes 59 through which a pair of wires 58 for supplying AC power from the outside to the power supply circuit 22 are inserted.
A cylindrical portion 60 is formed on the outer surface side of the bushing 14, and a groove portion 61 into which the peripheral edge portion of the wiring hole 47 is fitted is formed on the outer periphery of the cylindrical portion 60. On the outer peripheral portion of the inner surface of the groove portion 61 facing the outer surface of the housing 11, a flange portion 62 protruding into the groove portion 61 is formed. As shown in FIG. 1, when the bushing 14 is attached to the housing 11, the flange portion 62 is configured to contact the outer surface of the housing 11.

  Moreover, the translucent cover 15 is shown in FIG. 1 thru | or FIG. 4, and FIG. The translucent cover 15 is made of, for example, synthetic resin or glass having translucency. An annular contact portion 65 that protrudes into the recessed groove 37 of the housing 11 and contacts the packing 38 is provided on the periphery of the translucent cover 15. Mounting holes 66a through which screws 41 for fixing the translucent cover 15 to the housing 11 are inserted into one place in the center in the width direction on the front end side of the translucent cover 15 and two places on both sides in the width direction on the base end side. 66b is formed.

  The translucent cover 15 is formed with a light emitting element side cover portion 67a that covers the light emitting element mounting region 23a of the substrate 20 and a power circuit side cover portion 67b that covers the power circuit mounting region 23b.

  The light emitting element side cover portion 67a is formed in a flat plate shape and is in contact with the lower surface of the substrate 20. The light emitting element side cover portion 67a is formed with a lens portion 68 corresponding to the position of each light emitting element 21 of the substrate 20, and corresponding to the position of the screw 25 fixing the substrate 20 to the housing 11. A protrusion 69 is formed. The lens unit 68 has an upper surface formed as a concave surface on which the light emitting element 21 is disposed, and a lower surface formed as a convex surface protruding from the light emitting element side cover 67a, and controls the light from the light emitting element 21 to a predetermined light distribution. . The protruding portion 69 is located between the insides of the plurality of lens portions 68, and is projected in a hemispherical shape below the light emitting element side cover portion 67a so as to prevent interference with the screw 25. In the lens portion 68 and the protruding portion 69, the protruding portion 69 protrudes downward from the light emitting element side cover portion 67a rather than the lens portion 68 (see the two-dot chain line in FIG. 1).

  A predetermined gap is formed between the power supply circuit side cover 67b and the substrate 20 in order to prevent interference with the power supply circuit 22 of the substrate 20 and the screw 25 that fixes the substrate 20 to the housing 11. As shown, a projecting portion 70 projecting downward is formed. The projecting portion 70 is formed over substantially the entire area of the power circuit side cover portion 67b, and has a flat portion 71 parallel to the lower surface of the housing 11 and the substrate 20. The protruding portion 70 protrudes below the lens portion 68 with respect to the lower surface of the housing 11, and the protruding amount is the same as the protruding amount of the protruding portion 69 (see the two-dot chain line in FIG. 1). ). Further, a plurality of pressing portions 72 that press the substrate 20 against the housing 11 are formed on both sides of the protruding portion 70 in the width direction.

  The fire spread prevention sheet 16 is disposed along the inner surface of the power circuit side cover portion 67b of the translucent cover 15, and the power circuit 22 mounted on the power circuit mounting area 23b of the substrate 20 and the power circuit of the translucent cover 15. Isolate from the side cover 67b. As the fire spread prevention sheet 16, for example, Nomex (trade name) paper type 410 is used.

  The illuminating device 10 configured as described above is installed, for example, on a utility pole or pole installed on the side of a road by the mounting portion 36 and a separately used mounting bracket. At that time, the power supply circuit 22 is connected to an AC power supply by an electric wire 58, and the casing 11 is grounded. In the installed state of the lighting device 10, the front end side of the housing 11 is inclined obliquely upward, and the light source unit 12, the translucent cover 15 and the like are opposed to the center side of the road.

  In the illuminating device 10, the outside light collected from the lighting window 54 on the upper surface of the housing 11 enters the illuminance sensor 30 through the light shielding cylinder 55, and the illuminance sensor 30 detects the brightness.

  The power supply circuit 22 converts the alternating current power into predetermined direct current power and supplies it to the light emitting element 21 when the brightness detected by the illuminance sensor 30 is lower than a predetermined threshold when the light emitting element 21 is turned off. The light emitting element 21 is turned on. In addition, the power supply circuit 22 stops the supply of DC power to the light emitting element 21 when the brightness detected by the illuminance sensor 30 is higher than a predetermined threshold in the lighting state of the light emitting element 21, and the light emitting element 21 Turn off the light.

  Further, when the light emitting element 21 is turned on, heat generated by the light emitting element 21 is transmitted to the substrate 20, is thermally conducted from the substrate 20 to the casing 11, and is radiated from the outer surface of the casing 11 to the atmosphere. Part of the heat transmitted to 20 is transmitted to the translucent cover 15 and is radiated from the outer surface of the translucent cover 15 to the atmosphere.

  The heat generated by the electronic components 29 of the power supply circuit 22 is radiated into the air in the power supply circuit side space 34a where the power supply circuit 22 is disposed, and the heat is generated by convection of the air in the power supply circuit side space 34a. It is transmitted to the body 11 and radiated from the outer surface of the housing 11 to the atmosphere.

  The lighting device 10 according to the present embodiment includes a partition 43 in the housing 11, and the partition 43 provides a space in the housing 11 corresponding to the light emitting element 21 side and the power circuit 22 side of the substrate 20. Since the part 34 is partitioned and thermally isolated, the heat from the light emitting element 21 mounted on one substrate 20 and the heat from the power supply circuit 22 can be prevented from affecting each other through the space part 34.

  Since the contact part 44a that contacts the substrate 20 is provided corresponding to the position of the light-emitting element 21 mounted on the substrate 20, the heat of the light-emitting element 21 can be efficiently transmitted to the housing 11, improving the heat dissipation effect it can.

  In the housing 11, wall portions 44 and 45 are provided in the space portion 34 (light emitting device side space portion 34 a) corresponding to the light emitting element 21 side of the substrate 20, so that the contact area between the housing 11 and the substrate 20 is provided. The heat dissipation effect can be improved.

  The wall portion 44 is integrally provided with a contact portion 44a, and the wall portion 45 is integrally provided with a boss 39a for fixing the substrate 20 and a boss 42a for fixing the translucent cover 15, thereby simplifying the structure of the housing 11. Can be

  By providing the partition portion 43 and the wall portions 44 and 45 in the housing 11, the strength of the housing 11 can be improved.

  The maximum height of the light emitting element side space 34a from the inner surface of the housing 11 to the light emitting element mounting region 23a of the substrate 20 is the power circuit side space 34b from the inner surface of the housing 11 to the power circuit mounting region 23b of the substrate 20 Because the maximum height of the board is also low, the light emitting element mounting area 23a of the board 20 is brought closer to the housing 11, the heat of the light emitting element 21 is easily transferred to the housing 11, improving the heat dissipation effect, and the power circuit mounting of the board 20 The region 23b can be separated from the housing 11, and an insulation distance necessary for lightning-proof surge can be ensured between the electronic component 29 of the power supply circuit 22 and the housing 11.

  In addition, since the upper surface portion 32 of the housing 11 is entirely formed of a curved surface, it is less likely to accumulate snow than when it is configured as a flat surface, and serves as a scaffold for workers who work on climbing poles and poles. Can be prevented.

  Although the upper surface portion 32 of the housing 11 is generally formed of a curved surface, a flat surface portion 49 is formed on the top portion of the upper surface portion 32, a daylighting hole 50 is provided in the flat surface portion 49, and packing 53 is provided in the daylighting hole 50. Since the daylighting window 54 is arranged via the packing 53, the packing 53 functions reliably and can prevent water from entering, and it is assumed that the daylighting hole 50 is provided in the curved surface portion and the daylighting hole 50 is provided with the daylighting through the packing 53. When the window 54 is disposed, a gap may be generated between the curved surface portion and the packing 53, and there is a risk of flooding.

  Further, since the protrusion 47a is provided on the outer surface side of the wiring hole 47 of the housing 11 so as to surround the wiring hole 47, rainwater flowing along the outer surface of the housing 11 does not flow into the wiring hole 47. It can be blocked by the protrusion 47a, and the waterproofness can be improved.

  The bushing 14 that closes the wiring hole 47 of the housing 11 is provided with a flange 62 that contacts the outer surface of the housing 11, so that rainwater that flows along the outer surface of the housing 11 does not flow into the wiring hole 47. It can be blocked by the flange 62, and the waterproofness can be improved.

  Further, since the translucent cover 15 is provided with the protruding portion 70 that protrudes downward from the lens portion 68 with respect to the lower surface of the housing 11, the lens portion 68 can be prevented from being damaged. For example, when the lighting device 10 is installed, when the lighting device 10 is placed on a mounting surface such as the ground with the translucent cover 15 facing downward, the projecting portion 70 is mounted on the mounting surface, so that the lens unit 68 hardly hits the mounting surface, and the lens portion 68 can be prevented from being damaged.

  Between the inner sides of the plurality of lens portions 68 of the translucent cover 15, the projection portion 69 that projects downward from the lens portion 68 is provided on the lower surface of the housing 11. 68 scratches can be prevented.

  The protrusion 70 of the translucent cover 15 has a flat surface 71 parallel to the lower surface of the housing 11 and the substrate 20, so that the posture of the lighting device 10 is stable when the protrusion 70 is mounted on the mounting surface. In addition, the lens unit 68 can be prevented from hitting the mounting surface.

  Since the fire spread prevention sheet 16 is interposed between the protruding portion 70 of the translucent cover 15 and the power circuit 22 of the substrate 20, it is possible to prevent the translucent cover 15 from spreading even when the power circuit 22 is ignited.

  Since the pressing portion 72 that presses the substrate 20 against the housing 11 is provided on the projecting portion 70 of the translucent cover 15, the substrate 20 is held between the housing 11 and the pressing portion 72, and the substrate 20 is attached to the housing 11 It is possible to improve the heat dissipation effect.

  The peripheral portion of the lens portion 68 of the translucent cover 15, that is, the light emitting element side cover portion 67a holds the substrate 20 between the case 11 and the substrate 20 can be brought into close contact with the case 11 to improve the heat dissipation effect. .

  Further, since the gap 51 is provided between the outer edge of the substrate 20 and the inner edge of the opening 35 (space 34) of the housing 11, the wiring pattern of the substrate 20 and the mounted components and the housing Insulation space is formed between the body 11 and the insulation distance between the substrate 20 and the housing 11 can be secured, and the insulation distance can be maintained even if the substrate 20 or the housing 11 contracts or expands due to cold or warm. In addition, air can flow through the gap 51, and improvement in heat dissipation can be expected.

  Since the board mounting portion 46 for attaching the substrate 20 is provided inside the opening 35 of the housing 11, the outer edge of the substrate 20 and the inner edge of the opening 35 (space 34) of the housing 11 are provided. A gap 51 can be provided between them.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

10 Lighting equipment
11 Enclosure
12 Light source unit
20 substrates
21 Light emitting element
22 Power supply circuit
35 opening
46 Board mounting part
51 Clearance

Claims (1)

A housing having an opening on the lower surface, and a substrate mounting portion provided inside the opening;
A substrate provided in an outer shape smaller than the opening, a light-emitting element mounted on the substrate, and a power circuit mounted on the substrate, the substrate covering the opening of the housing A light source unit that is attached to the substrate attachment portion and has a gap provided between an outer edge of the substrate and an inner edge of the opening of the housing;
An illumination device comprising:

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