JP5967346B2 - Lighting device - Google Patents

Description

  Embodiments described herein relate generally to an illumination device including an illuminance sensor.

  2. Description of the Related Art Conventionally, an illumination device such as a crime prevention light or a street light using a light source such as an LED element has a structure in which an illuminance sensor and a lighting circuit are housed in a resin-made translucent cover together with the light source. In this illumination device, the ambient brightness is detected by an illuminance sensor through a translucent cover, and the light source is automatically turned on and off according to the detected brightness.

JP 2011-34856 A

  However, the conventional lighting device has a structure that covers the illuminance sensor and the lighting circuit together with the light source with a resin-made translucent cover so that the ambient brightness can be detected by the illuminance sensor. There is a problem that cannot be taken.

  The problem to be solved by the present invention is to provide an illuminating device having a fire spread prevention structure capable of lighting control according to ambient brightness.

The illumination device according to the embodiment includes a metal housing having a daylighting hole and having a lower side opened. The lighting hole of the housing is closed with a translucent member. A metal mounting plate is disposed in an opening on the lower side of the housing, and an accommodation space is formed between the housing and the mounting plate. A light source is disposed below the mounting plate. In the accommodation space, an illuminance sensor that detects external light that enters through the light-transmitting member from the daylighting hole is disposed, and a lighting circuit that lights the light source based on the detection by the illuminance sensor is disposed. The lighting circuit includes a substrate having an upper surface as a mounting surface and a lower surface as a wiring pattern surface , and a plurality of electric components mounted on the substrate , and an electric component having a lead wire is mounted on the mounting surface of the substrate. At the same time, an illuminance sensor is mounted in the vicinity of the outer edge of the mounting surface of the substrate , and the substrate , the electrical component, and the illuminance sensor are accommodated in the accommodating space with a predetermined insulation distance from the housing and the mounting plate.

  According to the present invention, since the illuminance sensor and the lighting circuit are housed in the housing space formed between the metal housing provided with the daylighting hole and the metal mounting plate, the lighting control according to the ambient brightness. It can be expected to provide a lighting device having a fire spread prevention structure.

It is sectional drawing of the illuminating device which shows 1st Embodiment. It is sectional drawing of an illuminating device same as the above. It is a perspective view of the decomposition | disassembly state of an illuminating device same as the above. The shape of the lighting hole of the housing | casing of the illuminating device which shows 2nd Embodiment is shown, (a) is sectional drawing of the lighting hole of 2nd Embodiment, (b) (c) shows the comparative example of a lighting hole. It is sectional drawing.

  Hereinafter, a first embodiment will be described with reference to FIGS. 1 to 3.

  In the figure, the illumination device 10 is a security light, a street light, or the like attached to a utility pole or pole. The illuminating device 10 includes a lamp body 11 and a mounting portion 12 for attaching the lamp body 11 to a utility pole, a pole, or the like.

  The lamp body 11 includes a housing 15, a mounting plate 17 that covers the lower surface of the housing 15 and forms an accommodation space 16 with the housing 15, a light source unit 18 disposed on the lower surface side of the mounting plate 17, A translucent cover 19 covering the light source unit 18 and a lighting unit 20 accommodated in the accommodating space 16 are provided.

  The casing 15 is made of a metal such as aluminum, for example, and the lower surface side is opened, and the attachment portion 12 is integrally formed on the base end side. The casing length from the base end side to the opposite front end side is The length in the direction is long, and the length in the case width direction orthogonal to the case longitudinal direction is short. An annular mounting portion 27 is formed on the inner side of the lower surface periphery of the housing 15 so that the peripheral portion of the mounting plate 17 contacts and is mounted, and an annular concave groove 28 is formed around the mounting portion 27. Has been. An annular packing 29 interposed between the concave cover 28 and the translucent cover 19 is disposed. Further, bosses 30 for screwing the translucent cover 19 are formed at the four corners of the lower surface periphery of the housing 15.

  In the central region of the upper surface of the housing 15, a flat surface portion 31 that is parallel to the lower surface peripheral portion of the housing 15 and the attachment portion 27 is formed. A curved shape is formed from the periphery of the flat portion 31 to the peripheral portion of the lower surface of the housing 15.

  A circular daylighting hole 32 centering on an axis perpendicular to the plane portion 31 is formed in the plane portion 31 at a position close to the front end side of the housing 15. The inner peripheral surface of the daylighting hole 32 is formed into a surface that is perpendicular to the plane portion 31. On the inner surface of the flat portion 31, a pair of protrusions 33 project from both sides of the housing width direction with respect to the daylighting hole 32, and a pair of bosses 34 on both sides of the casing longitudinal direction with respect to the daylighting hole 32. Is protruding.

  A light transmissive member 36 is fitted into the daylighting hole 32 from the inside of the daylighting hole 32 via an annular packing 35 to close the daylighting hole 32. The packing 35 has a pair of insertion holes 35a through which the protrusions 33 are inserted, and is positioned and held with respect to the housing 15 in a state where the protrusions 33 are inserted into the insertion holes 35a. The translucent member 36 is formed of translucent synthetic resin or glass, and is screwed to the cup-shaped translucent portion 37 fitted into the daylighting hole 32 through the packing 35 and the boss 34 of the housing 15. A pair of mounting legs 38 is provided. The attachment leg portion 38 is formed in a bifurcated shape so that the boss 34 can be inserted therethrough.

  A plurality of bosses 39 for screwing the mounting plate 17 are integrally formed on the peripheral wall surface inside the housing 15. Further, a plurality of bosses 40 for screwing the lighting unit 20 are integrally formed from the upper wall surface inside the housing 15.

  A wiring hole 22 through which a cable 21 for supplying power to the lighting unit 20 is inserted is formed on the base end side of the housing 15. A cable 21 is inserted into the wiring hole 22 and a bushing 23 for closing the wiring hole 22 is fitted therein. The bushing 23 is screwed to the housing 15 by a mounting bracket 24.

  The mounting plate 17 is made of a metal such as aluminum, for example, and is formed in a rectangular plate shape that closes the lower surface opening of the housing 15 and can contact the mounting portion 27 of the housing 15. The mounting plate 17 is screwed to the plurality of bosses 39 in a state where the peripheral portion of the mounting plate 17 is in contact with the mounting portion 27 of the housing 15 and is pressed against the mounting portion 27 of the housing 15. A closed storage space 16 is formed between the inside of the housing 15 and the mounting plate 17. A cutout portion 17a for wiring is formed in a part of the mounting plate 17.

  The light source unit 18 includes a light emitting module 42 and a lens module 43.

  In the light emitting module 42, for example, a wiring pattern is formed on a metal substrate 44 via an insulating layer, and an LED element 45 and a connector 46, which are a plurality of semiconductor light emitting elements, are mounted on the wiring pattern. . The mounting method of the LED element 45 may be either an SMD (Surface Mount Device) method or a COB (Chip On Board) method. Note that an EL (Electro Luminescence) element or the like may be used as the semiconductor light emitting element.

  The lens module 43 is formed of, for example, a light-transmitting synthetic resin or glass, and includes a flat plate portion 47 and a plurality of lens portions 48 formed corresponding to the positions of the LED elements 45. . The lens unit 48 irradiates light generated by the LED elements 45 in a predetermined light distribution direction.

  The lens module 43 and the light emitting module 42 are screwed to the mounting plate 17 with the light emitting module 42 sandwiched between the mounting plate 17 and the lens module 43, and the substrate 44 of the light emitting module 42 is placed on the lower surface of the mounting plate 17. It is in pressure contact.

  The translucent cover 19 is formed of, for example, a translucent synthetic resin or glass, and has an annular contact portion 51 that enters the concave groove 28 of the housing 15 and contacts the packing 29 at the periphery. doing. The four corners of the translucent cover 19 are screwed to the boss 30 of the housing 15, and the contact portion 51 is pressed against the packing 29 between the concave groove 28 of the housing 15.

  The lighting unit 20 includes an insulating support plate 54 screwed to the boss 40 of the housing 15 and a lighting circuit 56 supported by the support plate 54 via a plurality of insulating spacers 55. Have.

  The lighting circuit 56 includes a substrate 57 and a plurality of electrical components 58 mounted on the substrate 57. The substrate 57 is a printed wiring board, and an upper surface is formed on a mounting surface on which an electric component 58 having lead wires is mounted, and a lower surface is formed on a wiring pattern surface on which the electric component 58 is electrically connected by soldering. The substrate 57 is held on the support plate 54 via the spacer 55, and is supported in an insulated state by the insulating support plate 54 and the spacer 55 with respect to the metal casing 15.

  Accordingly, the lighting circuit 56 is housed in the housing space 16 in a state where the substrate 57 and the electrical component 58 are exposed, and is housed in a state where a predetermined insulating distance is provided between the housing 15 and the mounting plate 17. ing.

  An illuminance sensor 60 is mounted on the substrate 57 at a position facing the daylighting hole 32 of the housing 15. The illuminance sensor 60 is opposed to the daylighting hole 32 so that the center of the illuminance detection surface of the illuminance sensor 60 coincides with the center of the daylighting hole 32 and is electrically connected to the circuit pattern of the substrate 57, that is, lit. Connected to circuit 56.

  The cable 21 is connected to the power input side of the lighting circuit 56, and a wiring with a connector (not shown) connected to the output side of the lighting circuit 56 is connected to the connector 46 of the light emitting module 42 through the notch 17a of the mounting plate 17.

  The illuminating device 10 configured as described above is attached to, for example, a power pole or a pole installed on the side of the road by the mounting portion 12 and a separately used mounting bracket. In the mounted state of the lighting device 10, the front end side of the lamp body 11 is inclined obliquely upward, and the light source unit 18 and the translucent cover 19 are opposed to the center side of the road.

  In the illuminating device 10, external light enters the housing 15 through the lighting hole 32 provided on the upper surface of the housing 15 and the translucent member 36 that closes the lighting hole 32, and the illuminance sensor 60 controls the brightness. To detect.

  The lighting circuit 56 lights the LED element 45 when the brightness detected by the illuminance sensor 60 is lower than the reference value, while the LED circuit 45 is turned on when the brightness detected by the illuminance sensor 60 is higher than the reference value. Turn off the light.

  Heat generated when the LED element 45 is turned on is thermally conducted from the substrate 44 to the mounting plate 17 and is also conducted from the mounting plate 17 to the housing 15 and efficiently radiated from the housing 15 to the atmosphere.

  Further, since the lighting device 10 houses the lighting circuit 56 in the housing space 16 formed between the metal casing 15 and the metal mounting plate 17, the lighting device 10 can be configured as a fire spread prevention structure.

  Even if a metal casing 15 is used for preventing the spread of fire, a lighting hole 32 is provided on the upper surface of the casing 15, and the lighting hole 32 is closed by the translucent member 36. Ambient brightness is detected by the illuminance sensor 60, and lighting control according to the ambient brightness can be performed.

The size of the daylighting hole 32 is not less than a size that allows the outside light incident from the daylighting hole 32 to be accurately detected by the illuminance sensor 60 and not more than a size necessary to maintain the fire spread prevention structure, for example, 100 mm ^{About 2} is preferable.

  Further, when the lighting circuit 56 is arranged in the housing 15, the lighting circuit 56 is generally stored in a metal case. However, in this embodiment, the lighting circuit 56 is not used in the housing space 16 and is used. The board 57 and the electrical component 58 of 56 are accommodated in an exposed state, and the board 57 and the electrical component 58 of the lighting circuit 56 are spaced apart from the housing 15 and the mounting plate 17 by a predetermined insulation distance. Stored. Thus, by not using a metal case for the lighting circuit 56, it is possible to reduce the size of the lighting device 10 including the casing 15, and further, the substrate 57 and the electrical components 58 of the lighting circuit 56, the casing 15, and the mounting plate The lighting circuit 56 can be protected against lightning surge by securing a predetermined insulation distance between the light source 17 and the light source 17.

  As described above, the illuminating device 10 of this embodiment includes the illuminance sensor 60 and the lighting circuit in the housing space 16 formed between the metal casing 15 provided with the daylighting holes 32 and the metal mounting plate 17. Since 56 is accommodated, it is possible to provide the lighting device 10 having a fire spread prevention structure that can perform lighting control according to ambient brightness.

  In addition, since the daylighting hole 32 is provided in the flat portion 31 of the housing 15, for example, the daylighting hole 32 can be made smaller while ensuring the desired daylighting performance compared to the case where it is provided in the curved portion of the housing 15. The fire spread prevention structure can be maintained.

  Further, since the illuminance sensor 60 is mounted on the substrate 57 of the lighting circuit 56 at a position facing the daylighting hole 32, the illuminance sensor 60 can be easily incorporated into the lighting device 10, and the illuminance sensor 60 can be incorporated through the daylighting window 32. Brightness can be detected accurately.

  Next, a second embodiment will be described with reference to FIG.

  As shown in FIG. 4A, the daylighting holes 32 provided in the housing 15 are formed so that the area on the outer surface side of the housing 15 is large and the area on the inner surface side is small. That is, the inner peripheral surface of the daylighting hole 32 is formed as a conical slope having the detection surface of the illuminance sensor 60 or the vicinity thereof as a vertex.

  4 (b) and 4 (c) show a comparative example, and FIG. 4 (b) shows a case where the inner peripheral surface of the daylighting hole 32 is vertical, and external light is easily irradiated around the illuminance sensor 60. 4C shows a case where the inner peripheral surface of the daylighting hole 32 has an inclination opposite to that shown in FIG. 4A, and external light is likely to be applied to a wide area around the illuminance sensor 60. FIG. Therefore, the ultraviolet rays contained in the external light are irradiated to the substrate 57 and other electrical components 58 of the lighting circuit 56, and the influence of deterioration or the like is likely to occur.

  As shown in FIG. 4A, the inner peripheral surface of the daylighting hole 32 is formed on a conical slope having the detection surface of the illuminance sensor 60 or the vicinity thereof as the apex, so that external light is transmitted to the illuminance sensor 60. It is difficult to irradiate around the illuminance sensor 60. Therefore, it is difficult for ultraviolet rays contained in external light to irradiate the substrate 57 and the electrical component 58 of the lighting circuit 56, and deterioration of them can be prevented.

  In the case of the shape of the daylighting hole 32 of the present embodiment, the packing 35 and the translucent member 36 may be fitted on the outer surface side of the housing 15 to close the daylighting hole 32.

  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
15 housing
16 containment space
17 Mounting plate
31 Flat part
32 Daylight hole
36 Translucent member
45 LED element as light source
56 Lighting circuit
57 PCB
58 Electrical components
60 Illuminance sensor

Claims (1)

A metal housing having a daylighting hole and having an open bottom;
A translucent member that closes the daylighting hole of the housing;
A metal mounting plate disposed in an opening on the lower side of the housing and forming a housing space with the housing;
A light source attached to the underside of the mounting plate;
An illuminance sensor that is housed in the housing space and detects external light incident through the light-transmitting member from the daylighting hole;
A board having an upper surface as a mounting surface and a lower surface as a wiring pattern surface , and a plurality of electric components mounted on the board , and the electric components having lead wires are mounted on the mounting surface of the board The illuminance sensor is mounted in the vicinity of the outer edge of the mounting surface of the substrate , and the substrate , the electrical component, and the illuminance sensor are placed in the housing space with a predetermined insulation distance from the housing and the mounting plate. A lighting circuit that is housed and turns on the light source based on detection by the illuminance sensor;
Lighting apparatus characterized in that it comprises a.

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