JP2011018469A - Lighting system - Google Patents

Abstract

Provided is a lighting device that houses a light source using a light emitting element with a simple structure.
A lighting device includes a light-transmitting cylindrical cover having a top portion that is closed and having an opening on a base end side, and a light-emitting substrate having a light-emitting element disposed on a main surface side. The light emitting unit is inserted from the opening 13 of the cylindrical cover and disposed along the longitudinal direction of the cylindrical cover, and the opening 13 of the cylindrical cover is closed and power is supplied to the light emitting unit. Since the base portion 30 provided with the wiring portion 33 is provided, it is possible to provide a structure in which the light emitting unit is covered with a cover while obtaining a desired light distribution characteristic with a simple configuration.
[Selection] Figure 5

Description

  The present invention relates to an illumination device using a light emitting element such as a light emitting diode.

  As a conventional lighting fixture of this kind, a large number of white light emitting diodes provided on a single substrate are used, and the angle of the multiple substrates is changed to form a polygonal surface. The thing which employ | adopted the structure light-emitted in the direction is known (refer patent document 1).

JP 2004-200102 A

  However, this lighting fixture has a structure in which a plurality of substrates are attached to the fixture body and a substantially hemispherical light-transmitting cover that covers the substrates is attached to the opening of the fixture body. Since the number of parts is increased and the number of assembling steps is increased, there is a problem that the product cost is increased.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an illumination device in which a light source using a light emitting element is accommodated in a cover with a simple structure.

  According to another aspect of the present invention, there is provided a lighting device including: a translucent cylindrical cover having a top portion closed and having an opening portion on a proximal end side; and a light emitting substrate on which a light emitting element is disposed on a main surface side. A light emitting unit inserted from the opening of the cylindrical cover and disposed along the longitudinal direction of the cylindrical cover; a base provided with a wiring portion that closes the opening of the cylindrical cover and supplies power to the light emitting unit And a portion.

  The cylindrical cover has a cylindrical structure in which at least the light projecting portion has translucency and an accommodation space is formed inside, and the accommodation space does not communicate with the outside except for the opening. Yes. The cylindrical cover has a shape with a long dimension in the direction from the opening toward the tip side, but other shapes may have an optical characteristic in which the emitted light of the light emitting unit is irradiated in a desired direction. There is no particular limitation.

  As the light emitting element, a solid light emitting element that can be disposed on a light emitting substrate such as a light emitting diode or an organic EL is applied.

  The light emitting unit has at least a light emitting substrate and has a structure that can be disposed in a cylindrical cover. Note that the light emitting substrate itself may form a light emitting unit.

  The base portion has a structure that closes the opening of the cylindrical cover, and a wiring portion for wiring such as a lead wire and a wiring board for supplying power to the light emitting unit is provided inside the opening portion. .

  According to a second aspect of the present invention, in the illumination device according to the first aspect, the opening of the cylindrical cover is circular, and an O-ring is disposed between the opening and the base portion. .

  The O-ring is a component that ensures the waterproof performance inside the cylindrical cover, and is disposed in either the opening or the base portion of the cylindrical cover.

  The lighting device according to claim 1 or 2, wherein the light emitting unit includes a heat radiating plate having a light emitting substrate attached on one side thereof and a lighting device for lighting light emitting elements provided on the other side of the heat radiating plate. It is characterized by having.

  According to a fourth aspect of the present invention, in the lighting device according to any one of the first to third aspects, the cylindrical cover is integrally formed of a translucent resin, and a pair of grooves are formed along the longitudinal direction on the inner side. The light emitting unit is supported by inserting the peripheral edge of the light emitting unit into the groove.

  Since the cylindrical cover is integrally formed of translucent resin such as acrylic and polycarbonate, it has translucency as a whole, but because the light emitting unit is supported by a pair of grooves inside the cylindrical cover, The other surface side of the light emitting unit is not easily irradiated with the emitted light of the light emitting element, and desired light distribution characteristics can be obtained.

  The entire peripheral edge portion of the light emitting unit may not be inserted into the pair of grooves, or a part thereof may be inserted.

  According to the first aspect of the present invention, the cylindrical cover is provided by the base portion in which the light emitting unit is disposed along the longitudinal direction of the cylindrical cover in the translucent cylindrical cover and the wiring portion for supplying power is provided. Therefore, it is possible to provide an illumination device in which the light emitting unit is covered with a cover while obtaining a desired light distribution characteristic with a simple configuration.

  According to invention of Claim 2, since the opening part of a cylindrical cover is circular shape, waterproofness can be easily ensured with an O-ring.

  According to the invention of claim 3, since the light emitting unit has the heat radiating plate on which the light emitting substrate is mounted on one side and the lighting device is mounted on the other side, the light emitting element is efficiently radiated within the cylindrical cover. It becomes possible to do.

  According to the invention of claim 4, since the light emitting unit is supported by the pair of grooves inside the cylindrical cover, the other surface side of the light emitting unit is not easily irradiated with the emitted light of the light emitting element, and desired light distribution characteristics. Can be obtained.

FIG. 1 is a perspective view showing a security light which is an embodiment of the illumination device of the present invention. FIG. 2 is a side view of the security light of FIG. FIG. 3 is a bottom view of the security light of FIG. FIG. 4 is a front view of the security light of FIG. FIG. 5 is a side sectional view of the security light of FIG.

  A lighting device according to an embodiment of the present invention will be described with reference to the drawings.

  1 is a perspective view showing a security light according to an embodiment of the present invention, FIG. 2 is a side view of the security light of FIG. 1, FIG. 3 is a bottom view, FIG. 4 is a front view, and FIG. FIG.

  A security light 1 as an illuminating device includes a translucent cylindrical cover 10, a light emitting unit 20 accommodated in the cylindrical cover 10, and a base portion 30 attached to the proximal end side of the cylindrical cover 10. Yes.

  The cylindrical cover 10 has a top portion 11 closed and an opening 13 formed on the base end portion 12 side, forming a tubular shape as a whole. The cylindrical cover 10 is integrally formed of a translucent resin such as acrylic or polycarbonate, and has a translucency as a whole. Further, a white pigment and a light diffusing material are added to the translucent resin for forming the cylindrical cover 10, and the whole has a milky white appearance. Note that the entire cylindrical cover 10 may be transparent, or a part of the cylindrical cover 10 may be translucent.

  The cylindrical cover 10 of the present embodiment is configured by a cylinder body 10a on the top 11 side and a flange 10b on the base end 12 side. The outer peripheral portion of the flange portion 10b of the base end portion 12 has a cylindrical shape, and the contour of the opening 13 inside thereof is also circular. The cylinder body 10a is integrally provided in a cylindrical shape slightly smaller than the outer diameter of the flange portion 10b on the top 11 side of the flange portion 10b.

  A light projecting portion 14 and a shade portion 15 are formed on the tubular body 10a of the tubular cover 10. The cylinder body 10a functions as a light projecting portion 14 that transmits light irradiated to the road surface on the lower side, and as a shade portion 15 on the upper side. A U-shaped wall portion 15a is formed to protrude above the flange portion 10b side of the cap portion 15, and the wall portion 15a is formed at such a height that the tips thereof are aligned and flat. An accommodation space 16 that communicates with the opening 13 is formed inside the cylindrical cover 10, and the accommodation space 16 is a substantially closed space that does not communicate with anything other than the opening 13.

  The cylindrical cover 10 has a shape that is long in the direction from the opening toward the tip, but the other shapes are configured to obtain optical characteristics in which the emitted light of the light emitting unit is irradiated in a desired direction. If there is no particular limitation. On the inner side surface 17 of the flange portion 10b, a screw portion 17a is formed over the inner circumferential direction, and a flat surface 17b is continuously formed in the inner circumferential direction on the top portion 11 side from the screw portion 17a. Yes. The cylinder main body 10a is a tapered cylinder whose outer diameter decreases toward the top 11. In particular, the outer diameter dimension of the cylinder body 10a in the vertical direction has a larger ratio of decreasing toward the top portion 11 than the outer diameter dimension in the width direction, and the cross-sectional shape of the cylinder body 10a near the top portion 11 has the major axis in the width direction. It has a flat and substantially elliptical shape.

  Around the width direction of the cylindrical body 10a of the cylindrical cover 10, a stepped 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 is difficult to adhere to. Further, the stepped portion 18 is continuously formed around the longitudinal direction of the tube body 10a, so that the mechanical strength of the tube body 10a is also improved.

  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 cylindrical cover 10, and a pair of groove portions 19 are formed as viewed from the opening portion 13.

  The wall thickness of the cylindrical cover 10 is about 2.5 mm as a whole, including the cylinder body 10a and the flange portion 10b, ensuring predetermined characteristics such as mechanical strength, diffuse transmittance, heat dissipation and weather resistance. ing.

  The light emitting unit 20 has a light emitting substrate 21, and a light emitting diode element 22 as a light emitting element is mounted on the main surface side of the light emitting substrate 21. The light emitting board 21 is a printed board made of paper phenol, and a wiring pattern (not shown) and lands for connecting terminals of the light emitting diode elements are formed of copper foil on the main surface side of the light emitting board 21. Eight light emitting diode elements 22 that emit white light are mounted on the main surface side of the light emitting substrate 21 at a predetermined interval.

  The light emitting unit 20 includes a heat sink 23 made of aluminum, and the light emitting substrate 21 is attached to one surface side of the heat sink 23 by screws or the like (not shown) so as to be able to conduct heat. On the other surface side of the heat radiating plate 21, a lighting device 24 for lighting the light emitting diode element 22 is provided. The lighting device 24 includes a metal case 25 that houses a circuit board (not shown) that constitutes a constant current circuit and the like, and the case 25 is attached to the other side of the heat sink 21. An output line (not shown) of the lighting device 24 is connected to the light emitting substrate 21 through an insertion hole (not shown) formed in the heat sink 23.

  The light emitting unit 20 is supported by the cylindrical cover 10 by inserting the peripheral edge portion of the heat radiating plate 23 into a pair of groove portions 19 opened in the accommodation space 16 of the cylindrical cover 10. Further, the front end portion of the heat radiating plate 23 is also engaged with the groove portion 19 continuing to the top portion 11 side. Thus, the housing space 16 of the cylindrical cover 10 is substantially divided into the light projecting portion 14 side and the shade portion 15 side by the heat radiating plate 23.

  The internal volume of the storage space 16 on the side of the cap portion 15 is divided so as to be 2 to 3 times larger than the internal volume of the storage space 16 on the side of the light projecting portion 14. As a result, the accommodation space 16 on the side of the shade portion 15 is large in terms of heat capacity, and sufficient convection is performed, so that the heat exchange action utilizing the outer surface of the shade portion 15 is also performed well.

  The thickness of the heat sink 23 is about 2 mm, which is smaller than the height of the groove 19. However, on the top part 11 side of the groove part 19, an engagement clip part 19a that forms a gap substantially equal to the thickness of the heat sink 23 is formed. The engagement clip portion 19a is obtained by partially reducing the height dimension of the groove portion 19 on the top portion 11 side by increasing the thickness on the upper side of the groove portion 19 on the top portion 11 side. The peripheral edge portion on the front end side of the heat radiating plate 23 is inserted into and engaged with the engagement clip portion 19a. As a result, the peripheral edge portion on the one surface side of the heat radiating plate 23 is supported in a state of being placed on the lower step portion of the groove portion 19. In addition to providing the engagement clip portion 19a, an engagement piece that engages with the groove portion 19 may be provided on the other surface side peripheral portion of the heat radiating plate 23.

  By supporting the peripheral edge of the one surface side of the heat radiating plate 23 on the lower step of the groove portion 19, the heat radiating plate 23 and the light emitting substrate 21 are disposed slightly below the central axis of the cylindrical cover 10. At this time, since the distance from the light emitting diode element 22 to the inner surface of the light projecting unit 14 is secured 15 to 40 mm, the heat generation of the light emitting diode element 22 does not affect the light projecting unit 14 and is thermally deformed. And deterioration such as discoloration can be suppressed.

  By the way, the dimension of the groove portion 19 in the width direction is about 8 mm, and protrudes to the outside larger than the thickness dimension of the cylindrical body 10a of the cylindrical cover 10. Further, the peripheral edge portion of the heat radiating plate 23 is also inserted into the groove portion 19 so as to protrude outward from the outer surface of the tube main body 10a.

  The base portion 30 has a closing portion 31 that closes the opening 12 of the cylindrical cover 10. The base portion 30 is integrally formed with the closing portion 31 by a resin having excellent weather resistance and flame retardancy, such as ASA (Acrylonitrile-Styrene-Acrylate) resin, and its base end side is outward. It is formed in an open bottomed cylindrical shape.

  The closing portion 31 has a cylindrical shape, and a screw projection 31c is formed at a position where the closing portion 31 is screwed with the screw portion 17a on the inner surface side of the flange portion 10b. Further, an annular groove 31b is formed continuously in the circumferential direction at a portion facing the flat surface 17b on the inner surface side of the flange portion 10b, and an O-ring that contacts the flat surface 17b is formed in the groove 31b. 32 is inserted. That is, the screw projection 31c of the closing portion 31 is screwed into the screw portion 17a on the inner surface side of the flange portion 10b and the both are fitted to each other, whereby the closing portion 31 of the base portion 30 enters the housing space 16 side from the opening portion 13. The O-ring 32 comes into contact with the flat surface 17b of the inner side surface 17 of the flange portion 10b. The O-ring 32 is pressed between the flat surface 17b and the recessed groove 31b of the closing portion 31 to be elastically deformed, and the inside of the opening portion 13 has a water-tight structure to ensure waterproofness.

  A closing plate 31a for closing the opening 13 is provided on the distal end side of the closing portion 31, and the light emitting unit 20 is fixed by contacting the closing plate 31a and the base end side of the heat radiating plate 23. A wiring portion 33 through which a lead wire 32 for supplying power to the light emitting unit 20 is inserted is provided at a substantially central portion of the closing plate 31a. The wiring portion 33 is provided with a waterproof bushing 34 that is press-fitted and fixed to the cylindrical portion 33a and a cylindrical portion 33a having a through-hole formed therein, and the lead wire 32 is inserted into the waterproof bushing 34. Thus, the waterproofness of the wiring portion 33 is ensured.

  A cylindrical step portion 35 having substantially the same diameter as the flange portion 10 b is formed integrally with the closing portion 31 on the base end side of the base portion 30. In the upper part of the cylindrical step portion 35, there is provided a slit portion 36 that opens toward the outside, and a metal mounting plate 37 in which two screw holes are formed is fitted into the slit portion 36. ing. A screw insertion hole is formed at a position corresponding to the screw hole of the mounting plate 37 of the cylindrical step portion 35.

  The crime prevention light 1 of this embodiment is attached to a pole such as a utility pole installed on the road surface by an arm 40. The arm 40 has a curved portion 41 in which an intermediate portion of a U-shaped metal piece is bent in a substantially L shape, and a through-hole 42 of a mounting band wound around a utility pole and a mounting screw are wound around a base end portion. A locking hole 43 is formed.

  A screw mounting portion 44 is formed on the distal end side of the curved portion 41 of the arm 40, and two screws inserted into the screw mounting portion 44 are inserted into the slit portion 36 of the base body portion 30. The base portion 30 is attached to the arm 40 by being screwed into the screw hole of the attachment plate 37, and the security light 1 is supported by the arm 40. At this time, the long axis direction of the cylindrical cover 10 is installed at an angle of about 20 to 30 ° with respect to the horizontal plane so that the top portion 11 side is directed upward by the curved portion 41 of the arm 40. Therefore, the opening 13 of the cylindrical cover 10 is always directed downward in the installed state, so that water droplets due to rainfall are unlikely 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 top portion 11 side of the cylindrical cover 10 having a relatively large surface area upward, the heat dissipation characteristics can also be improved.

  The tip portion 45 of the arm 40 is disposed so as to form a slight gap with the tip of the wall portion 15a of the cap portion 15. The tip 45 functions to maintain a sufficient strength even with a load when used as a scaffold for the worker on the pole.

  Next, the effect of this embodiment is demonstrated. In the crime prevention light 1, a light emitting unit 20 is disposed in the cylindrical cover 10 along the longitudinal direction of the cylindrical cover 10, and the base portion 30 supplies power to the light emitting unit 20 through the wiring portion 33 while being supplied with power. The structure that closes the opening 13 of the cover 10 ensures the desired waterproof performance and light distribution characteristics with a simple configuration without using a complicated lamp structure like a conventional security light. can do.

  In particular, since the cylindrical cover 10 is formed of a light diffusing resin, the lighting image of the light emitting diode element 22 can be relaxed, and even if it is lit at night, it may make it difficult for pedestrians to feel glare. it can. Furthermore, since the cylindrical cover 10 is integrally formed of a translucent resin, external light will reach the storage space on the shade 15 side, so a photo switch and daylight sensor are placed in this space. Thus, the lighting device 24 may be provided with an automatic flashing function. Alternatively, the lighting device 24 may perform dimming control of the light emitting substrate 21 by detecting the external light level, and may perform control such that appropriate illuminance is ensured according to ambient brightness.

  Moreover, since the opening 13 of the cylindrical cover 10 has a circular shape, it is not necessary to prepare a waterproof packing that matches the shape of the cover, and it is easy to ensure waterproof performance by using an O-ring 32 of a predetermined diameter. Can do.

  The cylindrical cover 10 has a simple structure including a cylindrical main body 10a and a flange portion 10b. The light emitting unit 20 is also a support structure that is inserted along the longitudinal direction by a pair of grooves 19 provided in the cylindrical cover 10a. For this reason, the direction in which the resin mold is removed is reduced, and the molding process can be simplified. Further, since the security light is an illumination device that lights at night, the temperature of the cylindrical cover 10a does not increase excessively while the light emitting diode element 22 is lit, and there is no problem even if the cylindrical cover 10a is molded from resin. .

  Furthermore, since the light emitting unit 20 is provided with a heat sink 23 having a light emitting substrate 21 on one side and a lighting device 24 on the other side, the light emitting diode element 22 is efficiently radiated within the cylindrical cover 10. It becomes possible to do. In particular, since the housing space 16 of the cylindrical cover 10 is substantially divided between the light projecting portion 14 side and the shade portion 15 side by the heat radiating plate 23, the heat of the light emitting substrate 21 that is relatively high in temperature is located on the shade portion 15 side space. The thermal influence on the circuit components can be suppressed.

  Since the heat radiating plate 23 is disposed in the cylindrical cover 10, it is not exposed to the outside air, but since the accommodation space 16 has a sufficient volume for convection necessary for heat radiation, The heat radiation from the heat sink 23 can be satisfactorily performed in the cylindrical cover 10. In addition, since the cylindrical cover 10 has a relatively large surface area and a thin wall thickness of about 2.5 mm, the thermal conductivity of the cylindrical cover 10 itself is ensured, and heat exchange with the outside air can be performed satisfactorily. The temperature of the light emitting substrate 21 does not rise excessively.

  Furthermore, since the light emitting unit 20 is supported by the pair of grooves 19 inside the cylindrical cover 10, the emitted light of the light emitting diode element 22 is difficult to be irradiated on the upper side, which is the other surface side of the light emitting unit 20. It is possible to take countermeasures against light pollution while obtaining the light distribution characteristics. Particularly, the dimension of the groove portion 19 in the width direction protrudes to the outside larger than the wall thickness dimension of the cylinder body 10a of the cylindrical cover 10, and the peripheral portion of the heat radiating plate 23 also protrudes outward from the outer surface of the cylinder body 10a. In this way, the radiated light from the light emitting diode element 22 is not easily irradiated on the side of the shade 15 and the stray light phenomenon in which light is undesirably leaked by guiding the wall thickness of the cylindrical cover 10 as much as possible. Can be suppressed.

  DESCRIPTION OF SYMBOLS 1 ... Security light as a lighting device, 11 ... Top part, 12 ... Base end, 13 ... Opening part, 10 ... Translucent cylindrical cover, 20 ... Light emitting unit, 21 ... Light emitting substrate, 22 ... Light emitting element, 23 ... Heat sink, 24 ... lighting device, 30 ... base portion 33 ... wiring portion, 32 ... O-ring.

Claims (4)

A cylindrical cover having a closed top and an opening on the proximal side;
A light emitting unit in which the light emitting element has a light emitting substrate disposed on the main surface side, and the substrate is inserted from the opening of the cylindrical cover and disposed along the longitudinal direction of the cylindrical cover;
A base portion provided with a wiring portion for closing the opening of the cylindrical cover and supplying power to the light emitting unit;
An illumination device comprising:   The lighting device according to claim 1, wherein the opening of the cylindrical cover has a circular shape, and an O-ring is disposed between the opening and the base portion.   The light-emitting unit includes a heat radiating plate having a light-emitting substrate attached on one side thereof, and a lighting device for lighting light-emitting elements provided on the other side of the heat radiating plate. The lighting device described.   The cylindrical cover is integrally formed of a translucent resin, and a pair of grooves are formed along the longitudinal direction on the inner side thereof, and the periphery of the light emitting unit is inserted into this groove to support the light emitting unit. The lighting device according to claim 1, wherein the lighting device is a light source.

Images