JP2012216477A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device equipped with an optical sensor having excellent light receiving to enable appropriate detection.SOLUTION: The lighting device is provided with a light source part 2 including a substrate 21 and a light emitting element 22 mounted on the substrate 21; a fixing member 3 of which on the front face side this light source part 2 is arranged; a lighting device 4 including a circuit board 41 arranged on the rear face side of the fixing member 3, a circuit component 42 which is mounted on the front face side of the circuit board 41 and opposes the rear face side of the fixing member 3, and an optical sensor 43 which is mounted on the rear face side of the circuit board 41 and detects luminance of the environment and controls the light source part 2; and a translucent cover member 1 for covering the light source part 2 and the lighting device 4.

Description

  Embodiments described herein relate generally to an illumination device including an optical sensor that senses ambient brightness and controls a light source unit.

  In this kind of lighting device, there is known a lighting device that includes an optical sensor that senses ambient brightness and that has a light source unit having an automatic blinking function. For example, in a security light as a lighting device, control is performed such that the light source unit automatically turns on when the surroundings become dark and automatically turns off when the surroundings become bright.

  Conventionally, an optical sensor has been arranged on the back side of a light source section that uses a light emitting element such as an LED as a light source, so that the optical sensor is not affected by light from the light emitting element, thereby preventing malfunction of the optical sensor. A device has been proposed.

JP 2011-18469 A JP 2011-34856 A

  However, the illuminating device is not particularly considered for the arrangement so that the light sensor can receive light well.

  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 including an optical sensor capable of receiving light with good light reception in consideration of an arrangement position of the optical sensor.

  The illuminating device by embodiment of this invention is equipped with the light source part provided with the board | substrate, the light emitting element mounted in this board | substrate, and the attachment member by which this light source part was arrange | positioned at the front side.

  A lighting device is disposed on the back side of the mounting member. The lighting device includes a circuit board and a circuit component mounted on the front side of the circuit board and facing the back side of the mounting member. And an optical sensor that is mounted on the back side of the circuit board and senses ambient brightness to control the light source unit. Furthermore, the cover member which has the translucency which covers the said light source part and a lighting device is provided.

  According to the embodiment of the present invention, it is possible to provide an illumination device that can control the light source unit by appropriate detection of the optical sensor. Further, since the optical sensor is mounted by effectively using the circuit board of the lighting device, the configuration can be simplified.

It is a perspective view which shows the illuminating device which concerns on embodiment of this invention. It is a side view which shows the same illuminating device. It is side sectional drawing which shows the same illuminating device. It is a perspective view which decomposes | disassembles and shows the same illuminating device.

  Embodiments 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, FIG. 2 is a side view, and FIG. 3 is a side sectional view. FIG. 4 is an exploded perspective view. 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 translucent cover member 1, a light source unit 2, a mounting member 3 to which the light source unit 2 is attached, a lighting device 4 that controls lighting of the light source unit 2, a base unit 5, and a base unit 5. And an arm 6 attached to the head.

  The cover member 1 has a distal end portion 11 closed, an opening 13 formed on the proximal end portion 12 side, and is formed in a cylindrical shape. The cover member 1 is integrally formed of a translucent resin such as acrylic or polycarbonate and has translucency as a whole. In addition, a white pigment or a light diffusing material is added to the translucent resin for forming the cover member 1, and as a whole, a milky white appearance is exhibited. Note that the cover member 1 may be entirely transparent or partially transparent.

  The cover member 1 includes a cylindrical body 1a on the distal end portion 11 side and a flange portion 1b on the proximal end portion 12 side. The flange portion 1b of the base end portion 12 has a cylindrical outer periphery, and the inner opening 13 has a circular outline. The cylinder body 1a is integrally formed with a cylindrical shape slightly smaller than the outer diameter of the flange portion 1b from the flange portion 1b toward the distal end portion 11 side.

  A light projecting portion 14 and a shade portion 15 are formed on the tube main body 1 a of the cover member 1. The cylinder body 1a functions as a light projecting unit 14 whose front side (light irradiation direction side, lower side in the drawing) transmits light irradiated to the road surface, and the rear side (upper side in the drawing) functions as a cap portion 15. To do. A substantially U-shaped wall portion 15a is formed on the back side of the cap portion 15 on the flange portion 1b side, and the wall portion 15a is formed at a height such that the tips thereof are aligned and flat. Has been. A housing space 16 that communicates with the opening 13 is formed inside the cover member 1, and the housing space 16 is a substantially closed space that does not communicate with anything other than the opening 13.

A female threaded portion 17a is formed in the inner circumferential direction on the inner side surface 17 of the flange portion 1b, and a flat surface 17b is formed continuously in the inner circumferential direction on the distal end portion 11 side from the female threaded portion 17a. ing. The cylinder main body 1a is a tapered cylindrical body having an inclined surface S that is slightly curved as the outer diameter decreases toward the distal end portion 11. In particular, the outer diameter dimension in the vertical direction of the cylinder main body 1a is larger at the rate of decreasing toward the distal end portion 11 than the outer diameter dimension in the width direction, and the cross-sectional shape of the cylindrical main body 1a near the distal end portion 11 is longer in the width direction. It becomes a flat, substantially elliptical shape.

  Around the width direction of the tube body 1 a of the cover member 1, a step portion 18 that protrudes slightly outward from the outer peripheral surfaces of the light projecting portion 14 and the shade portion 15 is continuously formed in a band shape. By projecting the step portion 18 to the outside, the step portion 18 functions as a ridge of the light projecting portion 14, and it becomes difficult for water droplets during rainfall to flow down to the light projecting portion 14. Dirt becomes difficult to adhere to.

  A groove portion 19 that opens into the accommodation space 16 is formed inside the step portion 18. That is, the groove portions 19 are provided in the width direction at least along the longitudinal direction of the cover member 1, and a pair of groove portions 19 are formed as viewed from the opening portion 13.

  The wall thickness of the cover member 1 is about 2.5 mm as a whole including the cylinder main body 1a and the flange portion 1b, and predetermined characteristics such as mechanical strength, diffusion transmittance, heat radiation action and weather resistance are secured. ing.

  The light source unit 2 includes a substrate 21 and a plurality of light emitting elements 22 mounted on the substrate 21. The substrate 21 is a printed board made of paper phenol formed in a substantially rectangular shape, and a wiring pattern (not shown) and a land for connecting terminals of the light emitting element 22 are formed on the surface side of the substrate 21 with a copper foil. Yes. In addition, as a material of the board | substrate 21, when using it as an insulating material, a ceramic material, a glass epoxy material, and another synthetic resin material are applicable. 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.

  Seven light emitting elements 22 that emit white light are linearly mounted on the surface side of the substrate 21 at a predetermined interval. The light emitting element 22 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. In this translucent resin, a phosphor is mixed in order to emit white light.

  A lens member 23 formed of a transparent material such as an acrylic resin having a lens portion formed so as to face each light emitting element 22 is disposed on the front side of the substrate 21.

  The light source unit 2 is attached to the attachment member 3. The mounting member 3 is made of a metal material having good thermal conductivity such as aluminum, and the tip side is formed in an arc shape and has a flat plate shape.

  The light source unit 2 is disposed on the front side of the mounting member 3 and is attached by a fixing means so that the back side (back side) of the substrate 21 is in close contact with the front side of the mounting member 3. Specifically, as representatively shown in FIG. 4, the screw penetrates the screw through hole formed in the substrate 21 and the screw through hole formed in the attachment member 3, and further in the case 44 of the lighting device 4 described later. The board 21 and the case 44 are simultaneously fastened and attached to the mounting member 3 by mounting bolts B that are tightened by nuts through the screw through holes formed in the mounting tongue 44b.

  A lighting device 4 is disposed on the back side of the mounting member 3. As representatively shown in FIGS. 3 and 4, the lighting device 4 includes a circuit board 41, a circuit component 42 mounted on the front side (front side) of the circuit board 41, and a rear side ( And an optical sensor 43 mounted on the back surface side.

  The circuit board 41 is made of an insulating material such as glass epoxy resin, and is formed in a substantially rectangular plate shape. On the surface side, the control IC, capacitor, winding component, resistance element, etc. are mainly large in height. A circuit component 42 is mounted. In addition, a circuit component 42a having a relatively small height such as a switching element or a surface-mounted component is mounted on the back side of the circuit board 41, and an optical sensor 43 is mounted on the tip side.

  The optical sensor 43 is composed of a photoelectric conversion element such as a photodiode that operates by sensing ambient brightness, and the blinking operation of the light source unit 2 is controlled by the detection output of the optical sensor 43.

  Such a lighting device 4 is mounted and accommodated in a case 44 made of a metal such as aluminum having thermal conductivity so that the circuit component 42 mounted on the circuit board 41 faces the back side of the mounting member 3. ing. The case 44 is formed in a substantially rectangular parallelepiped box shape, and a substantially circular light receiving hole 44 a is formed on the back wall so as to face the optical sensor 43. Moreover, the attachment tongue piece 44b is extended and formed in the short side which the front side opposes.

  Therefore, as described above, the lighting device 4 is mounted together with the board 21 by the mounting bolt B inserted from the front side of the board 21 on the back side of the mounting member 3 with the mounting tongue piece 44b of the case 44 attached. Arranged.

  The attachment member 3 having the light source part 2 attached to the front side and the lighting device 4 attached to the back side is inserted into the pair of groove parts 19 opened in the accommodation space 16 of the cover member 1 to the cover member 1. Supported. Further, the distal end side of the attachment member 3 is also engaged with a groove portion 19 that is continuous with the distal end portion 11. Thus, the housing space 16 of the cover member 1 is substantially divided by the mounting member 3 into the light projecting portion 14 side and the shade portion 15 side.

  In addition, since the light source unit 2 is supported by the groove portion 19 of the cover member 1, the shade unit 15 on the other surface side of the light source unit 2 is not easily irradiated with the emitted light of the light emitting element 2, and has a desired light distribution characteristic. It is possible to take measures against light pollution while obtaining it. In particular, the dimension in the width direction of the groove portion 19 is larger than the thickness of the cylinder body 1a of the cover member 1, and the peripheral edge of the mounting member 3 is also projected outward from the outer surface of the cylinder body 1a. Since it is inserted in the groove portion 19, the radiated light of the light emitting element 22 is not easily irradiated to the shade portion 15, and the stray light phenomenon in which light is undesirably leaked by guiding the thickness of the cover member 1 can be suppressed as much as possible. . Therefore, malfunction of the optical sensor 43 due to the influence from the light emitting element 22 can be suppressed.

  In the arrangement state of the lighting device 4, since the optical sensor 43 is mounted on the back side of the circuit board 41, the light sensor 43 is disposed so as to approach the cover member 1 and to be separated from the cover member 1. In addition, since the optical sensor 43 is opposed to the inclined surface S of the cylindrical main body 1a of the cover member 1, the distance from the cover member 1 is further shortened. Therefore, it is easy for outside light to reach the optical sensor 43 and the light receiving environment is good, and the light source unit 2 can be controlled by appropriate detection.

  The lighting device 4 as described above is connected to a commercial AC power source. Accordingly, the lighting device 4 receives this AC power supply, generates a DC output, supplies the DC output to the light emitting element 22 via the lead wire, and controls the light emitting element 22 to be turned on.

  The base 5 has a closing part 51 that closes the opening 13 of the cover member 1. The base portion 5 is integrally formed with a closing portion 51 of a resin having excellent weather resistance and flame retardancy such as ASA resin, and is formed in a bottomed cylindrical shape whose base end side is opened outward. .

  The closing part 51 has a cylindrical shape, and a male screw part 51c is formed at a position where it is screwed to the female screw part 17a on the inner surface side of the flange part 1b. Further, an annular groove 51b is formed continuously in the circumferential direction at a portion facing the flat surface 17b on the inner surface side of the flange portion 1b, and the O-ring that contacts the flat surface 17b is formed in the groove 51b. 52 is inserted.

  That is, the male screw part 51c of the closing part 51 is screwed into the female screw part 17a on the inner surface side of the flange part 1b, and the both are fitted, whereby the closing part 51 of the base part 5 enters the housing space 16 side from the opening part 13. The O-ring 52 comes into contact with the flat surface 17b of the inner surface 17 of the flange portion 1b. The O-ring 52 is pressed between the flat surface 17b and the concave groove 51b of the closing portion 51 to be elastically deformed, so that the inside of the opening portion 13 has a watertight structure, and waterproofness is ensured.

  A closing plate 51 a that closes the opening 13 is provided at the distal end side of the closing portion 51, and the mounting plate 3 a is in contact with the proximal end side of the mounting member 3 to fix the mounting member 3. A wiring portion 54 through which a lead wire 53 for supplying power to the lighting device 4 is inserted is provided at a substantially central portion of the closing plate 51a. The wiring portion 54 is formed with a cylindrical portion 54a having a through hole formed therein, and the waterproof property of the wiring portion 54 is secured by inserting the lead wire 53 into the through hole.

  A cylindrical step portion 55 having substantially the same diameter as the flange portion 1 b is formed integrally with the closing portion 51 on the base end side of the base portion 5. A slit portion 56 that opens toward the outside is provided in an upper portion of the cylindrical step portion 55, and a metal mounting plate 57 in which two screw holes are formed is fitted in the slit portion 56. ing. A screw insertion hole is formed at a position corresponding to the screw hole of the mounting plate 57 of the cylindrical step portion 55.

  The crime prevention light of the present embodiment is attached to a pole such as a utility pole installed on the road surface by the arm 6. The arm 6 has a curved portion 61 in which an intermediate portion of a U-shaped metal piece is bent in a substantially L shape, and a through hole 62 and a mounting screw of a mounting band wound around a power pole at a base end portion. A locking hole 63 is formed.

  A screw attachment portion 64 is formed on the tip side of the curved portion 61 of the arm 6, and two screws inserted into the screw attachment portion 64 are inserted into the slit portion 56 of the base portion 5. The base 5 is attached to the arm 6 by being screwed into the screw hole of the attachment plate 57, and the security light is supported by the arm 6. At this time, the major axis direction of the cover member 1 is installed at an angle of about 20 ° to 30 ° with respect to the horizontal plane so that the distal end portion 11 side is directed upward by the curved portion 61 of the arm 6.

Therefore, the opening 13 of the cover member 1 is always directed downward in the installed state, so that water droplets due to rainfall are less likely to enter the opening 13 and the waterproof performance is improved. Furthermore, since the efficiency of the convection and heat exchange in the shade portion 15 is improved by directing the front end portion 11 side of the cover member 1 having a relatively large surface area upward, the heat dissipation characteristics can also be improved.
In the crime prevention light configured in this way, when the outdoors becomes dark, power is supplied to the light source unit 2 from the power source side via the lighting device 4 by the detection output of the optical sensor 43, and the light emitting element 22 is turned on. Further, when the outdoors becomes bright, the power is cut off by the detection output of the optical sensor 43 and the light emitting element 22 is turned off.

  In this case, the optical sensor 43 is mounted on the back side of the circuit board 41, and is further disposed so as to face the inclined surface S of the cover member 1, so that external light is detected through the light receiving hole 44a. The light source unit 2 is appropriately controlled by detecting the appropriate brightness of the light sensor 43.

  In the lighting state of the security light, the light emitted from the light emitting element 22 passes through the lens member 23, passes through the translucent cover member 1, and is emitted outward in a desired light distribution state.

  On the other hand, heat is generated from the light emitting element 22 while the light emitting element 22 is turned on. This heat is conducted from the substrate 21 to the mounting member 3 and dissipated. Furthermore, heat conduction is promoted from the mounting member 3 to the case 44 in which the lighting device 4 is accommodated. At the same time, the heat generated from the lighting device 4 is mainly conducted to the case 44 and radiated.

  As described above, according to the present embodiment, since the optical sensor 43 is mounted on the back side of the circuit board 41, external light easily reaches the optical sensor 43, and the light source unit 2 is detected by appropriate detection of the optical sensor 43. Can be controlled. Moreover, since the optical sensor 43 is mounted by effectively using the circuit board 41 of the lighting device 4 without being mounted on a special board or the like, the configuration can be simplified.

Furthermore, since the optical sensor 43 is mounted on the back side of the circuit board 41 on which the circuit component 42a having a small height is mounted, it can be arranged to easily receive external light. In addition, the optical sensor 43 can receive light through a light receiving hole 44a formed in the case 44 in which the lighting device 4 is accommodated.
Further, since the optical sensor 43 faces the inclined surface S of the cover member 1, it is easier for external light to reach, and the optical sensor 43 can be appropriately detected.

In addition, this invention is not limited to the structure of the said embodiment, A various deformation | transformation is possible in the range which does not deviate from the summary of invention. For example, the light emitting element can be a solid light emitting element that can be mounted on a substrate such as an LED or an organic EL. Further, the number of mounted devices is not particularly limited.
Further, the lighting device is not limited to a crime prevention light, and can be applied to various lighting devices.

1 ... cover member, 2 ... light source part,
3 ... mounting member, 4 ... lighting device,
5 ... Base part, 6 ... Arm,
21 ... substrate, 22 ... light emitting element (LED),
41 ... circuit board, 42 ... circuit components,
43 ... optical sensor, 44 ... case,
44a: light receiving hole, S: inclined surface

Claims (4)

A light source unit comprising a substrate and a light emitting element mounted on the substrate;
An attachment member in which the light source is disposed on the front side;
A circuit board disposed on the back side of the mounting member, a circuit component mounted on the front side of the circuit board and facing the back side of the mounting member, and a peripheral brightness mounted on the back side of the circuit board A lighting device provided with a light sensor that senses the light and controls the light source unit;
A cover member having translucency covering the light source unit and the lighting device;
An illumination device comprising:   The circuit component having a large height is mainly mounted on the front side of the circuit board, and the circuit component having a small height is mounted on the back side of the circuit board. The lighting device according to 1.   A box-shaped case having a light receiving hole is attached to the back side of the mounting member, and the lighting device is disposed in the case so that the light sensor is disposed to face the light receiving hole. The illumination device according to claim 1 or 2, wherein   The said cover member is formed in the taper shape which makes an inclined surface toward a front-end | tip part, The said optical sensor is arrange | positioned corresponding to the said inclined surface, The Claim 1 thru | or 3 characterized by the above-mentioned. The lighting device according to any one of the above.

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