JP2020004628A - Signboard lighting device - Google Patents

Abstract

To provide a signboard lighting device which can enhance the homogeneity of signboard illumination.SOLUTION: A signboard lighting device 10 comprises: a baseboard 16 having a flat face 38; a plurality of light emitting diodes 18 arranged at the flat face 38 so that light emitting faces 44 are directed in a direction orthogonal to the flat face 38; and a cover 22 for covering the plurality of light emitting diodes 18 and a light distribution part 20 with a main body part 58 having light permeability. Lens bodies 46 for refracting a part of light emitted from the light emitting faces 44 in a direction parallel with the flat face 38 of the baseboard 16 are arranged at the respective light emitting faces 44 of the plurality of light emitting diodes 18. The cover 22 is constituted so as to oppose the lens bodies 46 from a direction in which the main body part 58 is parallel with the flat face 38 of the baseboard 16. Accordingly, light proceeding right beside from the lens bodies 46 passes through the main body part 58 of the cover 22 and goes outside the cover 22.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a signboard lighting device configured to illuminate a signboard installed outdoors.

  Conventionally, there are various kinds of outdoor lighting fixtures. An LED lighting device described in Patent Literature 1 below is an outdoor lighting device used as a street light or a security light, and includes a housing body, an LED light source, and gloves. The LED light source is mounted inside the housing body, and light generated by the LED light source is applied to a road surface or the like through a light diffusion unit formed on the glove. According to this LED lighting apparatus, since the LED light source is used, the power consumption can be reduced as compared with a mercury lamp or the like.

JP-A-2005-232959

  However, in the LED lighting apparatus described in Patent Literature 1, since a part of the housing body is arranged to face the LED light source in a direction orthogonal to the optical axis of the LED light source, the light is emitted from the LED light source. The emitted light could not be emitted to the outside of the LED lighting apparatus from the lateral direction, and the luminous intensity in the lateral direction of the LED light source was extremely low. Therefore, when this LED lighting fixture is used as a signboard lighting fixture, there is a problem that the outer periphery of the area of the signboard where light is irradiated becomes extremely dark, and the display content of the signboard becomes difficult to see.

  The present invention has been made to address the above-described problem, and has as its object to provide a signboard lighting device capable of improving the uniformity of signboard illuminance.

  In order to achieve the above object, a feature of a signboard lighting device according to the present invention is a signboard lighting device configured to illuminate a signboard, wherein a substrate having a flat surface and a light emitting surface are orthogonal to the flat surface. A plurality of light-emitting diodes provided on the flat surface so as to face in a direction in which the light-emitting diodes are provided, and a cover configured to cover the plurality of light-emitting diodes with the main body having a light-transmitting main body. A lens body for refracting a part of light emitted from the light emitting surface in a direction parallel to the flat surface, on each of the light emitting surfaces of the plurality of light emitting diodes, Is that the main body is configured to face the lens body from a direction parallel to the flat surface.

  In this configuration, after a part of the light emitted from the light emitting surface of the light emitting diode is refracted by the lens body in a direction parallel to the flat surface of the substrate, the light is transmitted from the light transmitting body of the cover to the cover. Can be put out. Therefore, the luminous intensity in the lateral direction of the lens body can be prevented from being extremely low, and the uniformity of the illuminance of the signboard can be improved. Thereby, the display content of the signboard can be easily seen.

  Another feature of the signboard lighting device according to the present invention has a light distribution unit that has light transmissivity and distributes light emitted from the light emitting surface of each of the plurality of light emitting diodes through the lens body. Each of the plurality of light emitting diodes is arranged side by side so as to form at least three rows parallel to each other, a direction in which the rows extend is defined as a vertical direction, and a direction orthogonal to the vertical direction is defined as a horizontal direction. Then, the light distribution unit is configured to spread light emitted from the outermost row in the horizontal direction in the horizontal direction more than light emitted from the row in the center in the horizontal direction. is there.

  In this configuration, light emitted from the outermost row in the horizontal direction can be wider in the horizontal direction than light emitted from the central row in the horizontal direction by the light distribution unit. It is possible to prevent the signboard from becoming extremely low, and to improve the uniformity of the illuminance of the signboard. In addition, when a plurality of signboard lighting fixtures are installed at intervals in the horizontal direction, the interval between two adjacent signboard lighting fixtures can be lengthened, so that a signboard lighting fixture used for one signboard can be used. The total number can be reduced.

  Another feature of the signboard lighting device according to the present invention is that, when attention is paid to two rows adjacent to each other in the horizontal direction, a plurality of the light emitting diodes constituting one of the rows are a plurality of light emitting diodes constituting the other of the rows. The light emitting diode is disposed at a position deviated in the vertical direction from the light emitting diode.

  In this configuration, since the plurality of light emitting diodes forming one row and the plurality of light emitting diodes forming the other row are arranged at positions shifted in the vertical direction, they are arranged at positions aligned in the vertical direction. In this case, the uniformity of the illuminance of the signboard can be increased as compared with the case where the signboard is used.

  Another feature of the signboard lighting device according to the present invention is that a light-emitting area of light radially emitted through the light distribution unit, a first central area in a horizontal direction, and a second outermost area in a horizontal direction, When divided into a third region between the first region and the second region, the light distribution unit has a luminous intensity of the third region higher than that of each of the first region and the second region. It is configured as follows.

  In this configuration, the distance of the optical path from the signboard luminaire to the signboard is the shortest in the first area where the light travels straight, so that even if the luminous intensity of the first area is low, the signboard illuminated with the light of the first area The illuminance is unlikely to be low. Further, the distance of the optical path from the signboard lighting device to the signboard is the longest in the second region where light travels obliquely. However, in a usage mode in which a plurality of signboard lighting devices are arranged in a horizontal direction (normal usage mode), Since the second areas of the two signboard luminaires adjacent to each other overlap, the illuminance of the signboard illuminated by the light of the second area is unlikely to be low. In the above configuration, since the luminous intensity of the third region is higher than the luminous intensity of each of the first region and the second region, the illuminance of the signboard is hardly reduced as a whole, and the uniformity of the illuminance of the signboard can be improved.

  Another feature of the signboard lighting device according to the present invention includes a heat sink having a support surface for supporting the substrate and the cover, and a mounting portion for mounting the heat sink to a support, wherein the mounting portion includes the signboard. And an angle adjusting mechanism for adjusting an inclination angle of the row with respect to the surface of the first row.

  With this configuration, heat generated in each of the plurality of light emitting diodes can be transmitted from the substrate to the heat sink and dissipated into the atmosphere. In addition, since the mounting portion has the angle adjusting mechanism, the inclination angle of the row of light emitting diodes with respect to the surface of the signboard can be appropriately adjusted according to the situation at the site.

It is a perspective view showing the composition of the signboard lighting fixture concerning an embodiment. It is a transverse cross section showing the composition of the signboard lighting fixture concerning an embodiment. It is an exploded perspective view showing the composition of the signboard lighting fixture concerning an embodiment. It is an exploded perspective view showing a part of composition of a signboard lighting fixture concerning an embodiment. It is a figure which shows the aspect of a light emitting diode and a lens body, (A) is a perspective view which shows these structures, (B) is sectional drawing which shows the positional relationship of these and a cover. (A) is a figure which shows the illuminance distribution of the signboard when the signboard lighting fixture which concerns on embodiment is used, (B) is a figure which shows the illuminance distribution of the signboard when using a general LED lighting fixture.

  Hereinafter, an embodiment of a signboard lighting device according to the present invention will be described with reference to the drawings.

(Configuration of signboard lighting fixture 10)
FIG. 1 is a perspective view illustrating a configuration of a signboard lighting device 10 according to the embodiment. FIG. 2 is a cross-sectional view showing the configuration of the signboard lighting device 10. FIG. 3 is an exploded perspective view showing the configuration of the signboard lighting device 10. FIG. 4 is an exploded perspective view showing a partial configuration of the signboard lighting device 10. Each of these drawings is schematically illustrated, for example, in order to facilitate understanding of the present invention. Therefore, dimensions, ratios, and the like between the components may be different from the actual components. The “horizontal direction” and “vertical direction” used in the following description correspond to the “horizontal” and “vertical” directions indicated by arrows in the figure.

  The signboard lighting device 10 illustrated in FIG. 1 is an outdoor lighting device configured to illuminate the signboard K illustrated in FIG. 6A, and is attached to a support 12 provided obliquely above and in front of the signboard K. used.

  As shown in FIG. 2, the signboard lighting device 10 includes a heat sink 14, a substrate 16, a plurality of light emitting diodes (LEDs) 18, a light distribution unit 20, and a cover 22. As shown in FIG. 1, the signboard lighting device 10 includes a power supply unit 24 and a mounting unit 26. In FIG. 2, components other than the substrate 16 and the light distribution unit 20 are shown in cross section.

  As shown in FIG. 3, the heat sink 14 is a block-shaped component having a support surface 28a for supporting the substrate 16 and the cover 22 on the surface, and is formed of a metal material having a high thermal conductivity such as aluminum. The heat sink 14 of the present embodiment is formed in a rectangular parallelepiped shape having a rectangular support surface 28a, and a plurality of fins 30 extend in the length direction on a surface 28b of the heat sink 14 opposite to the support surface 28a. They are formed parallel to each other.

  Further, a plurality of (twelve in the present embodiment) screw holes (not shown) into which fixing screws 32 for fixing the substrate 16 and the light distribution unit 20 are screwed to the support surface 28a, and the cover 22 is fixed. (In this embodiment, 18) screw holes 36 into which fixing screws 34 are screwed. In the present embodiment, the length direction of the heat sink 14 matches the “longitudinal direction”, and the width direction of the heat sink 14 matches the “horizontal direction”.

  As shown in FIG. 4, the substrate 16 is a rectangular plate-shaped component having a flat surface 38, and the substrate 16 supplies power to each of a plurality of (60 in the present embodiment) light emitting diodes 18. (Not shown) and a socket 40 electrically connected to the electric wiring. The substrate 16 is formed with a plurality of (11 in this embodiment) through holes 42a through which the fixing screws 32 are inserted and one slit 42b through which the fixing screws 32 are inserted.

  FIGS. 5A and 5B are diagrams showing aspects of the light emitting diode 18 and the lens body 46, wherein FIG. 5A is a perspective view showing these configurations, and FIG. 5B is a cross-sectional view showing the positional relationship between these and the cover 22. As shown in FIG. 5A, each of the plurality of light emitting diodes 18 is a light emitting element having a light emitting surface 44 for emitting light. The light emitting surface 44 of each light emitting diode 18 is provided with a lens body 46 that refracts a part of the light emitted from the light emitting surface 44 in a direction parallel to the flat surface 38 of the substrate 16. The lens body 46 of the present embodiment is formed in a hemispherical shape with a synthetic resin, and is configured so that light incident from a circular bottom surface (not shown) can be emitted from the entire hemispherical surface 46a. . Therefore, as shown by a broken line in FIG. 5B, light emitted from a portion of the hemispherical surface 46a close to the light emitting surface 44 passes through the inside of the light transmitting portion 20 having light transmittance to the flat surface of the substrate 16. After proceeding in a direction parallel to the surface 38, the light passes through the light-transmitting main body 58 of the cover 22 and exits the cover 22.

  As shown in FIG. 5A, each of the plurality of light emitting diodes 18 is provided on the flat surface 38 such that the light emitting surface 44 thereof is directed in a direction orthogonal to the flat surface 38 of the substrate 16. As shown in FIG. 4, each of the plurality of light emitting diodes 18 is arranged side by side so as to form five parallel rows 48a to 48e. Each of the rows 48a to 48e extends linearly in the vertical direction and is arranged at a certain interval in the horizontal direction. That is, in the present embodiment, the direction in which the rows 48a to 48e extend matches the "vertical direction", and the direction in which the rows 48a to 48e separate from each other matches the "horizontal direction".

  As shown in FIG. 4, when attention is paid to two columns (for example, columns 48a and 48b) adjacent to each other in the horizontal direction, the plurality of light emitting diodes 18 forming one column (for example, column 48a) The plurality of light emitting diodes 18 forming a row (for example, the row 48b) are arranged at positions shifted in the vertical direction.

  The light distribution unit 20 shown in FIG. 4 is a component that distributes light emitted from the light emitting surfaces 44 (FIG. 5A) of the plurality of light emitting diodes 18 through the lens body 46, and has light transmittance. It is formed in a plate shape by a synthetic resin. The light distribution unit 20 includes a plurality of first lens units 50 corresponding to a part of the plurality of light emitting diodes 18 constituting the outermost (left and right) rows 48a and 48e in the horizontal direction among the five rows 48a to 48e. And a plurality of through holes 52 exposing other portions of the plurality of light emitting diodes 18. In addition, the light distribution unit 20 includes a plurality of light emitting diodes 18 corresponding to the plurality of light emitting diodes 18 forming the rows 48b, 48c, and 48d on the center side of the rows 48a and 48e on both sides in the horizontal direction among the five rows 48a to 48e. It has two lens portions 54.

  Each of the plurality of first lens portions 50 spreads the light emitted from the light emitting surface 44 (FIG. 5A) of the light emitting diode 18 through the lens body 46 in the horizontal direction rather than the vertical direction (ie, in the horizontal direction). Distribution). On the other hand, each of the plurality of second lens portions 54 spreads the light emitted from the light emitting surface 44 (FIG. 5A) of the light emitting diode 18 through the lens body 46 in the vertical direction rather than the horizontal direction (that is, in the vertical direction). Directional distribution). In other words, the light distribution unit 20 spreads the light emitted from the outermost rows 48a, 48e in the horizontal direction more laterally than the lights emitted from the central rows 48b, 48c, 48d in the horizontal direction. (I.e., to distribute horizontally).

  As shown in FIG. 2, the light emitting area S of the light radially emitted through the light distribution unit 20 is divided into a first central area S1 in the horizontal direction, a second outermost area S2 in the horizontal direction, When divided into the third region S3 between the first region S1 and the second region S2, the light distribution unit 20 determines that the luminous intensity of the third region S3 is higher than the luminous intensity of each of the first region S1 and the second region S2. It is configured to be high.

  As shown in FIG. 4, the light distribution unit 20 includes a plurality of (11 in this embodiment) through holes 56 a through which the fixing screw 32 is inserted, and one slit 56 b through which the fixing screw 32 is inserted. Is formed.

  As shown in FIG. 2, the cover 22 is a component provided on the support surface 28 a of the heat sink 14 so as to cover the plurality of light emitting diodes 18 and the light distribution unit 20. And a sheet-like cushion material 60 interposed between the main body 58 and the support surface 28a. The main body 58 includes a facing portion 62 facing each of the plurality of light emitting diodes 18 via the light distribution portion 20, a side wall 64 formed on an outer peripheral edge of the facing portion 62, and a heat sink at the side wall 64. And a flange 66 formed at the end on the 14th side. That is, the main body 58 is configured to cover the plurality of light emitting diodes 18 and the light distribution unit 20.

  The opposing portion 62 is formed in a curved plate shape that is gently curved in the lateral direction, and fine inner surfaces 62a of the opposing portion 62 are formed with fine irregularities for diffusing light. Therefore, the facing portion 62 is not completely transparent but translucent. The flange portion 66 is formed in a flat plate shape that is parallel to the support surface 28a of the heat sink 14, and a cushion material 60 is attached to the facing surface 66a of the flange portion 66 that faces the support surface 28a. .

  As shown in FIG. 3, a plurality of reinforcing ribs 68 are formed on a surface 66 b of the flange 66 opposite to the facing surface 66 a so as to extend in the vertical direction. A plurality of (18 in this embodiment) through-holes 70 through which the fixing screws 34 are inserted are formed in the portions separated from the reinforcing ribs 68. Further, a power supply unit 24 having a plug (not shown) connected to the socket 40 is provided on an outer surface of a portion corresponding to one longitudinal end of the heat sink 14 in the side wall portion 64. A power line 72 is electrically connected to the plug.

  As shown in FIG. 5B, the thickness of the cushion material 60 is sufficiently smaller than the thickness of the portion where the substrate 16 and the light emitting diode 18 are combined. Therefore, the main body 58 of the cover 22 is disposed right beside the lens body 46 provided on the light emitting surface 44 of the light emitting diode 18. That is, the cover 22 is configured such that the light-transmitting main body 58 faces the lens body 46 in a direction parallel to the flat surface 38 of the substrate 16.

  The mounting portion 26 shown in FIG. 3 is a component for mounting the heat sink 14 to the support 12 (FIG. 6A), and is formed by bending a plate made of metal such as stainless steel into a substantially U-shape. . The mounting portion 26 has a fixing portion 74 fixed to the support 12 with bolts and nuts, and a pair of supporting portions 76a and 76b formed by bending both ends of the fixing portion 74 in the lateral direction. .

  A plurality of (four in the present embodiment) through-holes 78 serving as rotation centers of the heat sink 14 and a plurality of (the present embodiment) for fixing the heat sink 14 in an angle-adjustable manner are provided at the distal ends of the support portions 76a and 76b. 7) are formed. A bolt 82 is inserted into one of a plurality of (four in this embodiment) through holes 78, and the bolt 82 is screwed into a screw hole (not shown) formed on the side surface of the heat sink 14. Have been. A bolt 84 is inserted into one of the plurality (seven in the present embodiment) of through holes 80, and the bolt 84 is screwed into a screw hole (not shown) formed on the side surface of the heat sink 14. Have been. Therefore, by changing the through hole 80 through which the bolt 84 is inserted, the inclination angle of each row 48a to 48e (FIG. 4) of the light emitting diodes 18 with respect to the surface of the signboard K (FIG. 6A) can be changed. it can. That is, in the present embodiment, the inclination angles of the rows 48a to 48e (FIG. 4) of the light emitting diodes 18 with respect to the surface of the signboard K (FIG. 6A) are adjusted by the through holes 78 and 80 and the bolts 82 and 84. An angle adjusting mechanism 86 is configured.

(How to use the signboard lighting device 10)
FIG. 6A is a diagram illustrating an illuminance distribution of the sign K when the sign lighting device 10 is used, and FIG. 6B is an illuminance of the sign K when the general LED lighting device W is used. It is a figure showing distribution. When the signboard lighting device 10 is used, a plurality of arm-shaped supports 12 are arranged at regular intervals above and in front of the signboard K shown in FIG. Then, the signboard lighting device 10 is attached to each of the plurality of supports 12. When attaching the signboard lighting device 10 to the support 12, the fixing portion 74 shown in FIG. 3 is fixed to the support 12 using bolts and nuts (not shown).

  The total number of the signboard lighting fixtures 10, the position of the signboard lighting fixtures 10, the distance between two adjacent signboard lighting fixtures 10, and the like, the size of the signboard K, the distance of the optical path from the signboard lighting fixtures 10 to the signboard K, the signboard lighting fixtures 10 The signboard K is designed in such a manner that unevenness is hardly generated in the illuminance of the signboard K in consideration of the output of the signboard and the width of the light emitting area S (FIG. 2). In the example of use shown in FIG. 6A, the length of the signboard K in the horizontal direction is 10,000 mm (10 m), and the length of the signboard K in the vertical direction is 3500 mm (3.5 m). Therefore, using the four arm-shaped supports 12, each of the four signboard lighting devices 10 is arranged 1000 mm (1 m) forward from the upper end of the signboard K, and two adjacent signboard lighting devices 10 are 2700 mm apart. (2.7 m).

  The inclination angle of each of the rows 48a to 48e (FIG. 4) of the light emitting diodes 18 with respect to the surface of the sign K is determined by the position of the sign lighting device 10 with respect to the sign K, the vertical length of the sign K, and the light distribution unit 20 (FIG. In consideration of the light distribution characteristics of (1), the illuminance of the signboard K is adjusted so as not to cause unevenness. In the example of use shown in FIG. 6A, the inclination angle of each row 48a to 48e (FIG. 4) with respect to the surface of the signboard K is adjusted to 60 degrees.

  When the plurality of signboard lighting devices 10 attached to the support 12 are turned on, power is supplied from the power line 72 to each light emitting diode 18 of each signboard lighting device 10. Then, as shown in FIG. 5B, light is emitted from the light emitting surface 44 of each light emitting diode 18 through the lens body 46, and this light is refracted through the light distribution unit 20 and diffused through the cover 22. It is irradiated on the surface of the signboard K.

(Effects of the embodiment)
According to the present embodiment, the following effects can be obtained by the above configuration. That is, as shown in FIG. 5B, after a part of the light emitted from the light emitting surface 44 of the light emitting diode 18 is refracted by the lens body 46 in a direction parallel to the flat surface 38 of the substrate 16. , Can be taken out of the cover 22 from the main body 58 of the cover 22 having light transmittance. Therefore, the luminous intensity in the lateral direction of the lens body 46 can be prevented from being extremely low, and the uniformity of the illuminance of the signboard K can be improved. Thereby, the display content of the signboard K can be easily seen.

  Further, the light emitted from the outermost rows 48a, 48e in the horizontal direction by the light distribution unit 20 shown in FIG. 4 is made more horizontal than the lights emitted from the central rows 48b, 48c, 48d in the horizontal direction. Since it can be widened, it is possible to suppress the luminous intensity from being significantly reduced at the lateral end of the light emitting region S (FIG. 2), and to improve the uniformity of the illuminance of the signboard K. Further, since such an effect can be obtained, when a plurality of signboard lighting fixtures 10 are installed at intervals in the horizontal direction, the interval between two adjacent signboard lighting fixtures 10 can be lengthened, and 1 The total number of signboard lighting fixtures 10 used for one signboard K can be reduced.

  As shown in FIG. 4, when attention is paid to two columns (for example, columns 48a and 48b) adjacent to each other in the horizontal direction, the plurality of light emitting diodes 18 forming one column (for example, column 48a) Since the plurality of light-emitting diodes 18 forming a row (for example, the row 48b) are arranged at positions shifted in the vertical direction, the signboard K is compared with the case where the light-emitting diodes 18 are arranged at positions aligned in the vertical direction. Illumination uniformity can be improved.

  As shown in FIG. 2, since the distance of the optical path from the signboard lighting device 10 to the signboard K is the shortest in the first region S1 where light travels straight, even if the luminous intensity of the first region S1 is low, the first region The illuminance of the sign K illuminated by the light of S1 is unlikely to be low. In addition, the distance of the optical path from the signboard lighting device 10 to the signboard K is longest in the second region S2 because the light advances obliquely, but the second region S2 of the two signboard lighting devices 10 adjacent in the lateral direction overlaps. The illuminance of the signboard K illuminated by the light of the second area S2 is unlikely to decrease. Further, since the light distribution unit 20 is configured so that the luminous intensity of the third region S3 is higher than the luminous intensity of each of the first region S1 and the second region S2, the light distribution unit 20 is illuminated with the light of the third region S3. The illuminance of the sign K is unlikely to decrease. Therefore, the uniformity of the illuminance of the signboard K can be improved as a whole.

  6A and 6B, a region indicated by reference numeral D is a region where the illuminance is approximately 100 lx (lux), a region indicated by reference numeral E is a region where the illuminance is approximately 200 lx, and The region indicated by is a region where the illuminance is about 300 lx. The area indicated by reference G is an area where the illuminance is about 500 lx, and the area indicated by reference H is an area where the illuminance is about 700 lx (lux). In the illumination of the signboard K, it is desirable that the region G with the illuminance of about 500 lx be widely distributed. If the area of the area G is the same, it is economically desirable that the total number of the signboard lighting fixtures 10 is small. 6A and 6B, when the signboard lighting device 10 of the present embodiment is used (FIG. 6A), when the general LED lighting device W is used (FIG. It can be seen that the area of the same region G can be secured with a smaller number of lighting fixtures than in B)).

  As shown in FIG. 3, in the above-described embodiment, since the signboard lighting device 10 includes the heat sink 14, heat generated in each of the plurality of light emitting diodes 18 is transmitted from the substrate 16 to the heat sink 14 and dissipated into the atmosphere. be able to. Further, since the mounting portion 26 has the angle adjusting mechanism 86, the inclination angle of each of the rows 48a to 48e (FIG. 4) of the light emitting diodes 18 with respect to the surface of the signboard K can be appropriately adjusted according to the situation at the site. it can.

(Modification)
The present invention is not limited to the above embodiment, and various modifications can be made without departing from the purpose of the present invention. For example, in the above embodiment, the number of the rows 48a to 48e of the light emitting diodes 18 is five, but the number of the rows may be at least three, and may be three or four. , Six or more.

  As shown in FIG. 4, in the above-described embodiment, the plate-shaped light distribution unit 20 is provided so as to cover each of the plurality of light-emitting diodes 18. It may be formed integrally.

  As shown in FIG. 5B, the cover 22 of the embodiment is configured such that the flange 66 of the main body 58 faces the lens body 46 in a direction parallel to the flat surface 38 of the substrate 16. However, the cover 22 may be configured such that the side wall 64 of the main body 58 faces the lens body 46 in a direction parallel to the flat surface 38 of the substrate 16.

  As shown in FIG. 6A, in the above embodiment, the support 12 to which the signboard lighting device 10 is attached is provided obliquely above and in front of the signboard K. It may be provided below.

S: light-emitting area, 10: sign lighting, 12: support, 14: heat sink, 16: substrate,
18 light emitting diode, 20 light distribution part, 22 cover, 38 flat surface, 44 light emitting surface,
46: lens body, 58: body part.

Claims (5)

A signboard lighting device configured to illuminate a signboard,
A substrate having a flat surface;
A plurality of light emitting diodes provided on the flat surface so that the light emitting surface faces in a direction orthogonal to the flat surface,
A cover having a light-transmitting main body, and a cover configured to cover the plurality of light emitting diodes with the main body,
Each of the light emitting surfaces of the plurality of light emitting diodes is provided with a lens body that refracts a part of light emitted from the light emitting surface in a direction parallel to the flat surface,
The signboard lighting device, wherein the cover is configured to face the lens body from a direction in which the main body is parallel to the flat surface. It has light transmissivity, and includes a light distribution unit that distributes light emitted through the lens body from the light emitting surface of each of the plurality of light emitting diodes,
Each of the plurality of light emitting diodes is arranged side by side so as to form at least three rows parallel to each other,
When the direction in which the rows extend is the vertical direction, and the direction perpendicular to the vertical direction is the horizontal direction, the light distribution unit focuses light emitted from the outermost row in the horizontal direction at the center in the horizontal direction. The signboard lighting device according to claim 1, wherein the signboard lighting device is configured to spread laterally more than light emitted from the row.   When attention is paid to two rows adjacent to each other in the horizontal direction, the plurality of light emitting diodes forming one row are shifted in the vertical direction with respect to the plurality of light emitting diodes forming the other row. The signboard lighting device according to claim 2, wherein the signboard lighting device is arranged at a position.   A light-emitting area of light radially emitted through the light distribution unit includes a first central area in a horizontal direction, a second outermost area in a horizontal direction, and a third area between the first area and the second area. 4. The light distribution unit according to claim 2, wherein when divided into regions, the light distribution unit is configured such that the luminous intensity of the third region is higher than the luminous intensity of each of the first region and the second region. 5. Signboard lighting equipment as described. A heat sink having a support surface for supporting the substrate and the cover,
A mounting portion for mounting the heat sink to a support,
The signboard lighting device according to any one of claims 2 to 4, wherein the attachment portion has an angle adjustment mechanism that adjusts an inclination angle of the row with respect to a surface of the signboard.

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