JP2011258516A - Streetlight - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a streetlight which does not spoil designability while having an LED light source as a light source.SOLUTION: In the streetlight 1 having a lighting fixture body 5, cover glasses 15 as respective plane light-diffusing covers are arranged on light emitting surfaces at side faces of the lighting fixture body 5, and a plurality of LED light source modules 36 emitting plane irradiation light are arranged so as to be incident on each of the cover glasses 15 by making respective irradiation lights cross in the lighting fixture body 5.

Description

  The present invention relates to a street light provided with an LED light source.

  With the recent increase in output and life of LED light sources, lighting fixtures employing LED light sources as light sources are becoming widespread. There is no exception in the street light that illuminates the ground by supporting the lamp body containing the light source on an outdoor pole, and various LED street lights that employ an LED light source as the light source have been proposed (for example, Patent Documents). 1).

JP 2008-218182 A

Some street lamps using an HID lamp as a light source employ a frosted glass as a material of the globe, and improve the design by making the entire surface of the globe emit light with uniform brightness. However, when an LED is used as the light source, there is a problem that the luminance near the LED light source is increased and the luminance distribution on the surface of the globe is collapsed, so that the design is impaired.
This invention is made | formed in view of the situation mentioned above, and it aims at providing the street light which does not impair the designability, providing an LED light source in a light source.

  In order to achieve the above object, the present invention is a street lamp having a lamp body, and a light emitting surface on the side surface of the lamp body is provided with a planar light diffusive cover, respectively, and planar illumination is provided. A plurality of LED light source modules that emit light are provided so that irradiated light intersects each other in the lamp body and enters each of the light diffusing covers.

  According to the present invention, in the street light described above, the LED light source module includes a surface-mounted LED that emits irradiation light from a flat light emitting surface, and surrounds the LED, and the emission range of the irradiation light from the light emitting surface of the LED. And a reflecting mirror that expands and emits light in a large range.

  In the street light, the present invention is characterized in that each of the LED light source modules makes irradiation light incident on substantially the entire range of the light diffusing cover and uniformly emits the light emitting surface of the light diffusing cover. And

According to the present invention, since the light diffusing cover is provided on each of the light emitting surfaces of the side surfaces of the lamp body, the light diffusing cover can be used even when an LED having a very small luminescent spot is used as a light source. The light can be diffused and illuminated.
In addition to this, the light diffusing cover has a flat shape, and the LED light source module that emits flat irradiation light is used as a light source. Unevenness can be suppressed. At this time, since each LED light source module is provided so that the irradiation light of the LED light source module intersects in the lamp body and enters each of the light diffusing covers, the LED light source module directly covers the nearest light diffusing cover. Compared with the structure to irradiate, the distance from an LED light source module to a light diffusable cover can be taken large. Thereby, since the irradiation light of a LED light source module is fully expanded and uniformly irradiates the wide range of a light diffusable cover, the brightness nonuniformity of a light diffusable cover becomes less conspicuous and the designability can be improved.

It is a figure which shows the whole structure of the street light which concerns on this embodiment. It is a figure which shows the structure of a lamp main body. FIG. 3 is an exploded view of the lamp body. It is a figure which shows the structure of the light source unit for replacement | exchange, (A)-(C) is a top view, a front view, and a bottom view, respectively. It is a figure which shows the structure of a LED light source unit, (A)-(C) are respectively a front view, a side view, and a plan view. It is a figure which shows the structure of the light emission part of a LED light source module. It is explanatory drawing of the illumination of the street lamp which replaced the light source with the LED light source module.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing an overall configuration of a street lamp 1 that is a light source replacement target.
The street light 1 includes a pole 3 that is a pillar standing on an outdoor ground G, and a lamp body 5 that is fixed to the upper end portion 3A of the pole 3 coaxially with the pole 3. The pole 3 is provided with a storage part 4 for storing a ballast for supplying lamp lighting power to the lamp body 5 at a predetermined height from the ground G.

FIG. 2 is a diagram showing a configuration of the lamp body 5, and FIG. 3 is an exploded view of the lamp body 5. FIG. 2 shows the lamp body 5 after the light source is replaced with the LED light source, and the state before the replacement is appropriately indicated by virtual lines.
The lamp body 5 includes a cylindrical glove 7 having a polyhedron cross section (in this embodiment, a hexahedron) and an upper opening, and a shade 9 as a detachable lid that covers the top of the glove 7. . The globe 7 is a hexagonal cylindrical body whose lower part is slightly smaller in diameter than the upper part, and each side surface constitutes a light emitting surface. A glove frame 13 provided with a glass fitting opening 11 on each side surface and a cover glass 15 fitted into each glass fitting opening 11 illuminates the ground G by emitting light from the cover glass 15. To do. The cover glass 15 is made of frosted glass, which is an example of a light diffusing cover. During illumination, the entire surface of the cover glass 15 is brightened substantially uniformly so as to improve the design.

  A cylindrical mounting bracket 19 for inserting and fixing the upper end 3A of the pole 3 is provided at the bottom 17 of the globe frame 13, and a socket base mounting hole 21 is provided coaxially with the mounting bracket 19. Yes. Before the replacement to the LED light source, a socket base 23 is attached to the socket base mounting hole 21, and electrical wiring (not shown) is drawn from the ballast stored in the storage portion 4 through the inside of the pole 3. The HID lamp 25 as a lamp light source is attached to the socket base 23 for use. The HID lamp 25 is attached by removing the shade 9 from the globe 7 and inserting the HID lamp 25 into the globe 7 through the opening 14 at the top of the globe 7 and attaching it to the socket base 23. Thereafter, the cap 9 is attached to the globe 7 to close the opening 14. The shade 9 is formed in a hollow conical shape and forms an internal space S above the opening 14 of the globe 7.

  Moreover, when replacing the light source of the street lamp 1 with an LED light source, the HID lamp 25 and the socket base 23 are removed from the lamp body 5. Further, the ballast of the storage unit 4 is replaced with a lighting device for the LED light source, and the wiring 27 is drawn from the lighting device through the pole 3 to the opening 14 at the upper part of the globe 7 from the upper end 3A. Then, the replacement light source unit 10 for light source replacement is connected to the wiring 27 in the opening 14 of the globe 7, and then the shade 9 is attached to the globe 7, thereby completing the replacement with the LED light source. The wiring 27 is attached along the frame portion 28 extending vertically between the glass fitting openings 11 of the globe frame 13 so that the wiring 27 is not visible from the outside, and the wiring 27 is shaded when lighting. It will never be.

FIG. 4 is a diagram illustrating the configuration of the replacement light source unit 10, and FIGS. 4A to 4C are a top view, a front view, and a bottom view, respectively.
The replacement light source unit 10 is engaged with the upper edge portion 14A (FIG. 3) of the opening 14 of the globe 7 on the circumference of the annular ring frame 30 that enters the inside of the opening 14 of the globe 7. An engagement frame body (engagement member) 34 in which pieces 32 are provided at substantially equal intervals is provided, and an LED light source unit 38 including a plurality of LED light source modules 36 is supported on the engagement frame body 34. .
The annular frame 30 is formed in the same hexagonal shape as viewed from above the upper edge portion 14A of the opening 14 of the globe 7, and when the engagement frame body 34 is attached to the opening 14, the corner portions of the annular frame 30 and the opening 14 are formed. Alternatively, the replacement light source unit 10 is positioned with respect to the globe 7 by engaging the straight portions. Further, the annular frame 30 is provided with a drop-preventing wire attachment piece 42, and as shown in FIG. 2, one end of the drop-prevention wire 44 is fixed to the drop-prevention wire attachment piece 42. Is fixed to, for example, the zenith portion 9 </ b> A of the shade 9. Accordingly, even when the engagement frame body 34 and the opening 14 of the globe 7 are disengaged, the replacement light source unit 10 is prevented from falling.

The LED light source unit 38 is configured by providing a plurality of LED light source modules 36 around the center K on a base plate 40 supported at substantially the center of the engaging frame body 34, that is, at substantially the same position as the center K of the globe 7. ing.
FIG. 5 is a diagram illustrating the configuration of the LED light source module 36, and FIGS. 5A to 5C are a front view, a side view, and a plan view, respectively. FIG. 6 is a diagram schematically illustrating the main configuration of the light emitting unit 52, and FIGS. 6A to 6C are schematic diagrams viewed from the front, side, and plane, respectively.
The LED light source module 36 includes a substantially box-shaped case body 50 made of a high heat conductive material, and a light emitting unit 52 is provided on the front surface thereof. As shown in FIG. 6, the light emitting unit 52 is configured by providing one set of LED chips 56 and reflecting mirrors 54 side by side.
The LED chip 56 is configured as a so-called planar mounting type LED having a rectangular shape in a plan view mounted on a mounting substrate 57, and the entire upper surface thereof is formed as a light emitting surface 56A, and planar irradiation light is formed. Is emitted. In this embodiment, the LED chip 56 is mounted with a blue LED element on a mounting surface of a rectangular flat ceramic package and sealed with a phosphor resin in which a yellow phosphor is dispersed, and the blue LED light source emits blue light. A white LED that emits white light in a planar shape by using a mixed color of the color and the fluorescent color of the yellow phosphor is used.

The reflecting mirror 54 is a cylindrical body having a rectangular cross section, the LED chip 56 is disposed on the lower end portion 54A side, and the upper end portion 54B functions as an emission port. In the reflecting mirror 54, the opening of the lower end portion 54A is formed to have substantially the same size as the light emitting surface 56A of the LED chip 56, and widens from the lower end portion 54A side to the upper end portion 54B. It is larger than the light emitting surface 56 </ b> A of the LED chip 56. Then, as shown in FIG. 6C, the irradiation light emitted from the light emitting surface 56A of the LED chip 56 is incident on the inner surface of the reflecting mirror 54, reflected, and emitted from the emission port of the upper end portion 54B. . Thereby, the emission range of the irradiation light emitted from the light emitting surface 56A of the LED chip 56 is expanded to the opening area of the upper end portion 54B of the reflecting mirror 54 (the enlarged range is indicated by a hatched portion in FIG. 6A). . As a result, in the light emitting unit 52, the high luminance range of the light emitting surface 56A of the LED chip 56 is expanded to the opening area of the upper end portion 54B of the reflecting mirror 54, so that the light emission projection area is increased. The luminance unevenness when 52 is viewed in plan is reduced.
In the light emitting section 52, a set of the LED chip 56 and the reflecting mirror 54 is arranged in a predetermined arrangement direction L at a substantially constant interval, and light is emitted by planar white light from the LED chip 56 and the reflecting mirror 54. The entire surface of the section 52 is formed so as to emit light of flat light extending substantially in the arrangement direction L and to emit one pseudo light source that emits light substantially uniformly. Thereby, irradiation light can be uniformly incident on a wide range of the globe 7 and luminance unevenness in the globe 7 can be reduced.

  Each of the LED light source modules 36 is aligned with the longitudinal direction of the side surface of the globe 7 so that the LED chip 56 and the reflecting mirror 54 are aligned in the alignment direction L. It is attached to the base plate 40 in a posture so as to be arranged radially with respect to the center K of the engagement frame body 34, more specifically, at the opposing positions on the side surface of the globe 7. This mounting structure will be described in detail. The base plate 40 is provided with an angle adjusting plate 58 at each mounting position of the LED light source module 36, and the side surface of the case body 50 of the LED light source module 36 is provided on the angle adjusting plate 58. 50A (FIG. 5) is a bolt, and is fixed so that the tilt angle can be adjusted so that the direction of the emitted light can be changed in the vertical direction. Specifically, bolts 59 and 61 are provided at a predetermined interval on the side surface 50A of the case body 50, and the other bolt 61 is angle-adjusted while being fixed to the angle adjustment plate 58 by one bolt 59. The LED light source module 36 can be tilted up and down by being inserted into an arc-shaped cutout groove 60 (FIG. 4B) provided on the plate 58 and loosening the bolt 59. Yes.

  As shown in FIG. 2, the LED light source unit 38 is configured such that each LED light source module 36 transmits light at the upper end position Pu of the glass fitting opening 11 of the globe 7, that is, the side surface of the globe 7 after the replacement light source unit 10 is attached. It is supported by the engaging frame body 34 so as to be positioned above the upper end position Pu of the region. Thereby, the LED light source module 36 becomes difficult to be seen from the outside of the globe 7, and the design property can be improved because the LED light source module 36 is not reflected as a shadow on the cover glass 15 which is a frost glass.

Moreover, each LED light source module 36 is attached by adjusting the tilt angle so as to irradiate light to the cover glass 15 on the side surface of the globe 7 located obliquely downward from the attachment position above the upper end position Pu. That is, since each LED light source module 36 is mounted such that the emitted light is directed obliquely downward, the ground G can be efficiently irradiated. Thereby, even when the light source is replaced with the LED light source module 36 having a smaller amount of luminous flux than that of the HID lamp, it is possible to suppress a decrease in illuminance on the ground G.
In particular, in the lamp body 5 of the present embodiment, the shade 9 as a lid has an internal space S in which the LED light source unit 38 can be accommodated on the inner side, so that the LED light source unit 38 is located above the upper end position Pu. Further, it can be arranged on the upper side. As a result, the vertical angle α (see FIG. 7) when the direction of the emitted light of each LED light source module 36 is tilted vertically downward to the extent that the lower end 11a of the glass fitting opening 11 of the globe 7 is not shielded. ) Can be made small, so that the vicinity of the lamp body 5 can be illuminated even with an LED light source having directivity compared to the discharge lamp.

  When the light source is replaced by the replacement light source unit 10, an auxiliary reflector 66 that covers the bottom 17 is provided in the globe 7 as shown in FIG. 2, and the light component incident on the bottom 17 is reduced. It can be reflected and taken out. The auxiliary reflector 66 is disposed below the lower end 11a of the glass fitting opening 11 of the globe 7 so that it is not reflected as a shadow on the cover glass 15 that is frosted glass during illumination.

  Here, in the replacement light source unit 10, the plurality of LED light source modules 36 face each cover glass 15 around the center K of the globe 7 (that is, along the opening 14 at the top of the globe 7). It is set as the structure arrange | positioned in a position. In this configuration, if each LED light source module 36 emits light to the nearest cover glass 15, the brightness is high only at a location near the light emitting portion 52 of the LED light source module 36 in the surface of the cover glass 15 that is frosted glass. As a result, the entire surface cannot be maintained at a substantially uniform brightness, and the design is reduced.

Therefore, in the present embodiment, as shown in FIG. 7, the light emission direction is such that the plurality of LED light source modules 36 are incident on the cover glass 15 on the side facing each other across the center K of the globe 7. A light source is configured by arranging M in a posture toward the center K (that is, a posture in which irradiation light of each LED light source module 36 intersects in the lamp body 5). In other words, for each cover glass 15 (planar side surface) of the globe 7, the LED light source module 36 that emits light from the cover glass 15 to the outside is arranged at a position sandwiching the center K of the globe 7.
As a result, the distance between the cover glass 15 and the LED light source module 36 that enters the cover glass 15 is increased, and the spread radiation can be incident on the cover glass 15. Leveling can be achieved.
At this time, the angle of expansion β in the vertical direction (arrangement direction L) of the radiated light of each LED light source module 36 is set to an angle at which the light is incident over the entire length of the cover glass 15 in the vertical direction, or more. By forming the reflecting mirror 54 of the LED light source module 36 so that the horizontal parallel widening angle (not shown) is also an angle at which the light is incident over the entire length of the cover glass 15 in the width direction or more. The brightness within the surface of the cover glass 15 can be made uniform. In particular, in the present embodiment, since the light emitting section 52 of the LED light source module 36 emits light with substantially uniform luminance as a whole, the luminance distribution in the surface of the cover glass 15 can be made more uniform.

However, when the angle of expansion β in the vertical direction (arrangement direction L) of the radiated light of each LED light source module 36 is set to an angle at which light is incident over the entire length of the cover glass 15 in the vertical direction or more, the LED light source As the mounting height of the module 36 becomes lower, the other LED light source modules 36 enter and fall within the range of the emitted light of the LED light source module 36. Accordingly, each LED light source module 36 is configured to be disposed above the upper end position Pu and at a height at which the lower end portion 36A does not enter the light emission range of the other LED light source modules 36. Thus, the design property is not impaired without a shadow on the cover glass 15.

As described above, according to the present embodiment, the replacement light source unit 10 is configured by including the engagement frame body 34 that is detachably engaged with the opening 14 in the upper part of the globe 7 included in the lamp body 5. The light source of the street lamp 1 can be easily replaced with the LED light source simply by engaging the light source unit 10 with the opening 14 of the globe 7 and covering the shade 9 as a lid.
The engagement frame body 34 is provided with the LED light source module 36 so as to irradiate light downward from the top of the globe 7 and illuminate the ground G. Therefore, a reflector or the like is separately provided on the lamp body 5. Therefore, the LED light source modules 36 after the light source replacement can efficiently illuminate the ground G, and the illuminance reduction of the ground G can be prevented.

Further, according to the present embodiment, each of the LED light source modules 36 is provided in the engagement frame body 34 so as to be positioned above the upper end position Pu of the light transmission region on the side surface of the globe 7. Since the LED light source module 36 is difficult to see from the outside of the globe 7 and is not reflected as a shadow on the cover glass 15 which is frosted glass, the design can be improved.
In addition, by arranging each of the LED light source modules 36 above the upper end position Pu of the light transmission region on the side surface of the globe 7, the direction of the emitted light of each LED light source module 36 is tilted vertically downward. Since the vertical angle α can be reduced, the LED light source having directivity compared to the discharge lamp can illuminate the vicinity immediately below the lamp body 5.

  Further, according to the present embodiment, each of the LED light source modules 36 is provided so that the light emission direction M can be tilted variably in the vertical direction, so that the depth (side height) from the opening 14 to the bottom 17 of the globe 7. Accordingly, the inclination of each LED light source module 36 can be adjusted so that the emitted light is incident on the side surface of the globe 7. Thereby, the light source unit 10 for replacement | exchange can be used in common with each street lamp 1 provided with the globe 7 from which depth differs.

  In addition, according to the present embodiment, since the auxiliary reflector 66 that covers the bottom portion 17 is provided in the globe 7, the light component incident on the bottom portion 17 can be reflected and extracted to the outside, and the illuminance due to the light source replacement We can make up for the shortage.

  According to the present embodiment, since the cover glass 15 made of a light diffusing cover is provided on the side surface of the globe 7 of the lamp body 5, the LED chip 56 having a very small luminescent spot is used as the light source. Even so, it is possible to illuminate the cover glass 15 by diffusing light, and uneven brightness can be suppressed. In addition to this, since the cover glass 15 has a planar shape and the LED light source module 36 that emits planar illumination light is used as a light source, the cover glass 15 can be illuminated uniformly, and uneven brightness of the cover glass 15 is reduced. Can be suppressed. At this time, since each LED light source module 36 is provided so that the irradiation light of the LED light source module 36 intersects in the lamp body 5 and enters each of the cover glasses 15, the LED light source module 36 has the nearest cover glass 15. The distance from the LED light source module 36 to the cover glass 15 can be made larger than the configuration in which the light is directly irradiated. Thereby, since the irradiation light of the LED light source module 36 is fully expanded and uniformly irradiates the wide range of the cover glass 15, the brightness nonuniformity of the cover glass 15 becomes less conspicuous, and the design property can be improved.

  In addition, according to the present embodiment, each of the LED light source modules 36 includes a surface-mounted LED chip 56 that emits irradiation light from a flat light emitting surface 56A, and surrounds the LED chip 56, and the emission range of the irradiation light is LED. A reflection mirror 54 that expands and emits light in a larger range than the light emitting surface 56A of the chip 56 is provided. With this configuration, the high luminance range of the light emitting surface 56A of the LED chip 56 is expanded by the reflecting mirror 54, so that the light emission projection area is increased, and luminance unevenness when the LED chip 56 is viewed in plan can be reduced. .

  In addition, according to the present embodiment, the LED light source module 36 has a configuration in which the irradiation light is incident on substantially the entire range of the cover glass 15 and the entire cover glass 15 emits light uniformly. However, it is possible to improve the design without causing shadows or uneven brightness in the cover glass 15.

In addition, embodiment mentioned above shows the one aspect | mode of this invention to the last, A deformation | transformation and application are possible arbitrarily.
In the above-described embodiment, the street lamp 1 in which the lamp body 5 is fixed to the upper end portion 3A of the pole 3 is illustrated. However, the present invention is not limited to this, and an arm extending in the horizontal direction is provided on the upper portion of the pole 3, The present invention can also be applied to a so-called hanging type street lamp 1 that supports 5.

DESCRIPTION OF SYMBOLS 1 Street light 3 Pole 5 Lamp body 7 Globe 11 Glass insertion opening 11a Lower end 13 Globe frame 15 Cover glass (light diffusion cover)
36 LED light source module 38 LED light source unit 52 Light emitting part 54 Reflector 56 LED chip 56A Light emitting surface G Ground K Center L Arrangement direction M Light emission direction Pu Upper end position

Claims (3)

A street light having a lamp body,
The light emitting surface of the side surface of the lamp body is provided with a planar light diffusing cover on each side,
A street lamp characterized in that a plurality of LED light source modules for emitting planar irradiation light are provided such that each irradiation light intersects within the lamp body and enters each of the light diffusing covers. The LED light source module is
A surface-mounted LED that emits irradiation light from a planar light emitting surface, and a reflecting mirror that surrounds the LED and expands the emission light emission range to a range larger than the light emitting surface of the LED. The street light according to claim 1, wherein 3. The LED light source module according to claim 1, wherein each of the LED light source modules makes irradiation light incident on substantially the entire range of the light diffusing cover and uniformly emits the light emitting surface of the light diffusing cover. Street light.

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