JP5580707B2 - Lighting device - Google Patents

Description

  The present invention relates to a lighting device that forms a linear irradiation range having a constant width.

  When illuminating a production line extending linearly in a factory, lighting devices that form a long irradiation range along the extending direction of the production line are installed at regular intervals. Patent Document 1 describes an illumination device that forms a rectangular irradiation range.

  In this document, the illuminating device includes a plurality of light source modules having a rectangular irradiation range, and a rectangular irradiation range of a desired size is obtained by arranging these light source modules in a matrix in a state of being directed in the same direction. Is forming. Each light source module distributes the divergent light from the light emitting diode by a mirror on the inner peripheral surface of the cylindrical light distribution cup extending from the periphery of the light emitting surface of the light emitting diode toward the front of the light emitting surface. A rectangular irradiation range is formed.

JP 2009-99526 A

  In patent document 1, the rectangular irradiation range by an illuminating device is formed in parallel with the light emission surface of a light emitting diode. For this reason, in order to form a longer linear irradiation range by the lighting device, a light source module must be additionally arranged along the longitudinal direction of the irradiation range.

  The subject of this invention is providing the illuminating device which can form a linear irradiation range with a small number of light source modules in view of such a point.

In order to solve the above-described problems, the lighting device of the present invention includes:
A light source unit comprising two light source modules;
The light source module is
A substrate,
A light emitting element mounted on the surface of the substrate;
A light source lens mounted on the surface of the substrate in a state of covering the light emitting surface of the light emitting element;
A first reflecting plate extending at a predetermined angle from the position adjacent to the light source lens on the substrate toward the front of the light emitting surface;
The first reflection plate is disposed on both sides of the light source lens in a direction orthogonal to the direction adjacent to the light source lens, and obliquely extends from the substrate toward the front of the light emitting surface in a direction away from each other. A pair of second reflectors intersecting the plate,
The divergent light emitted from the light emitting element is reflected by the first reflecting light emitted in front of the substrate through the light source lens and the second reflecting plate after being refracted through the light source lens. Is distributed to the second outgoing light emitted in front of the substrate, and the first outgoing light and the second outgoing light form illumination light having a constant width that spreads at an angle formed by the substrate and the first reflector. Is supposed to
The light source units are arranged back to back with the substrates of the two light source modules in parallel or at an acute angle, and spread at an angle between the substrate of one of the light source modules and the substrate of the other light source module. A linear illumination light having a certain width is formed.

  According to the present invention, each light source module constituting the light source unit distributes the divergent light from the light emitting element using the light source lens and the reflecting plate, and the light emitting element is mounted from the light source module. Illumination light having a certain width that spreads at an angle formed by the substrate and the first reflecting plate is emitted. Therefore, compared with the case where the light source module distributes the divergent light from the light emitting element by the cylindrical mirror surrounding the light emitting element, the angular range of the illumination light emitted from the light source module can be widened. In the light source unit, the substrates of the two light source modules on which the light emitting elements are mounted are arranged back to back in a state of being parallel or forming an acute angle. In other words, in the light source unit, the light emitting elements mounted on each of the two light source modules are arranged so as to face each other with the substrate sandwiched therebetween, whereby the light source unit is separated from the substrate of one light source module to the other. The linear illumination light having a constant width that spreads at an angle between the light source module and the substrate is formed. Accordingly, the illumination light can be lengthened as compared with the case where the light emitting elements of the two light source modules are arranged to face in the same direction. Therefore, a linear irradiation range can be formed by a small number of light source modules. Further, since the divergent light from the light emitting element is distributed using the light source lens and the first and second reflectors, the light source module is formed as compared with the case where the light is distributed using only the reflector. It becomes easy to make illumination light into a line having a certain width.

In the light source module, the light source module may have an emission center point of a light emitting surface of the light emitting element on the substrate as an origin, and two axes extending perpendicular to the origin and coplanar with the light emitting surface as an X axis and Assuming that the Y-axis and the axis extending perpendicularly from the origin to the front of the light emitting surface are the Z-axis, the light source lens includes a central lens portion positioned forward in the Z-axis direction and both ends of the central lens portion in the Y-axis direction. And the central lens portion is configured to allow the diverging light to pass through in a divergent state when the central lens portion is cut along a plane including the X axis. The cross-sectional shape when cut along a plane including a positive power that refracts the diverging light in the direction of the XZ plane is cut along the plane including the X axis. If The surface shape has a positive power to refract the diverging light in the direction of the YZ plane, and the cross-sectional shape when cut along the plane including the Y axis refracts the diverging light in the direction of the XY plane. Light having a positive power is transmitted through the central lens portion is the first emitted light, and is light reflected by the pair of second reflecting plates after passing through the side lens portion. Is the second outgoing light.

According to the present invention, in the light source module, the transmitted light that has passed through the central lens portion of the light source lens among the divergent light from the light emitting element is linear with the width in the Y-axis direction narrowed along the XZ plane. . On the other hand, the light transmitted through each side lens portion of the light source lens among the divergent light from the light source is refracted in the direction of the XY plane and the direction of the YZ plane, and therefore does not overlap with the transmitted light of the central lens portion. The transmitted light is reflected in the direction of the XY plane by the second reflecting surface, so that it can be superimposed on the transmitted light of the central lens portion, or can be made to follow the transmitted light of the central lens portion. Therefore, the illumination light from the light source module can be linear with a constant width. In addition, light transmitted through the light source lens that has the X axis in the negative direction can be reflected to the YZ plane by the first reflecting plate, so that the luminous intensity of the illumination light can be increased. Here, when the cross-sectional shape when cut along the plane including the X axis is such that the diverging light is allowed to pass through in a diverging state, the cross-sectional shape is that which allows the diverging light to pass through without being refracted, or the diverging light. Is allowed to pass through without focusing.

In the present invention, in order to obtain a longer linear illumination light, the light source unit includes first and second light source units, and the first and second light source units are provided for each of the linear illumination lights. It is desirable that they are arranged so that a part in the longitudinal direction overlaps.

In the present invention, in order to increase the width of the linear illumination light, the light source unit includes first and second light source units, and the first and second light source units are the first light source unit. It is desirable that the linear illumination light and the linear illumination light of the second light source unit are arranged so as to be continuous in the width direction thereof.

  In this case, the light source lens is formed continuously on the end surface on the YZ plane of each of the side lens portions and the second center lens portion formed continuously on the end surface of the center lens portion on the YZ plane. Each of the central lens portion and the side lens portion is a rotating body obtained by rotating the same cross-sectional shape around the Y axis, and is from the XY plane. The second central lens portion has a predetermined length in the negative direction of the X axis with respect to the end surface on the YZ plane of the central lens portion. The second lateral lens portion is located on the YZ plane of the lateral lens portion in the negative direction of the X axis. A parallel moving body obtained by translating by a length, light transmitted through the central lens portion and light transmitted through the second central lens portion are the first emitted light, and the side lens portion is It is preferable that the light reflected by the pair of second reflecting plates after being transmitted and the light reflected by the pair of second reflecting plates after being transmitted through the second side lens portion are second emitted light.

  If the central lens part and the side lens part are formed from such a rotating body, the cross-sectional shape when cut along the plane including the X axis of the central lens part shall pass the divergent light in a divergent state. It becomes easy to make the cross-sectional shape of the side lens section cut along the plane including the X axis with a positive power that refracts the divergent light in the direction of the YZ plane. The second central lens portion has a cross-sectional shape when cut along a plane including the X axis that allows diverging light to pass through in a divergent state, and a cross-sectional shape when cut along a plane including the Y axis exhibits divergent light. A positive power for refracting in the direction of the XZ plane is provided. Further, each of the second side lens portions has a cross-sectional shape when cut along a plane including the X axis and allows diverging light to pass through in a divergent state, and a cross-sectional shape when cut along a plane including the Y axis is It has a positive power that refracts the diverging light in the direction of the XY plane. Accordingly, of the divergent light from the light source, the transmitted light of the second central lens portion is linear with the width in the Y-axis direction narrowed along the XZ plane, and is continuous with the transmitted light of the central lens portion. Further, the light passing through the second side lens portion of the divergent light from the light source is radiated in the negative direction of the X axis from the YZ plane, and is refracted in the direction of the XY plane. Therefore, the transmitted light of the second side lens part is emitted in a direction not overlapping with the transmitted light of the central lens part and the second central lens part, but this transmitted light is reflected in the direction of the XY plane by the second reflecting surface. And superimposed on the transmitted light of the central lens portion or along the transmitted light of the central lens portion. Therefore, the illumination light from the light source module can be linear with a constant width. In addition, light transmitted through the light source lens that has the X axis in the negative direction can be reflected to the YZ plane by the first reflecting plate, so that the luminous intensity of the illumination light can be increased.

  According to the present invention, each light source module constituting the light source unit distributes the divergent light from the light emitting element using the light source lens and the reflecting plate, and the light emitting element is mounted from the light source module. Illumination light having a certain width that spreads at an angle formed by the substrate and the first reflecting plate is emitted. Therefore, compared with the case where the light source module distributes the divergent light from the light emitting element by the cylindrical mirror surrounding the light emitting element, the angular range of the illumination light emitted from the light source module can be widened. In the light source unit, the substrates of the two light source modules on which the light emitting elements are mounted are arranged back to back in a state of being parallel or forming an acute angle. That is, in the light source unit, the light emitting elements mounted on each of the two light source modules are arranged so as to face each other with the substrate sandwiched therebetween, whereby the light source unit is separated from the substrate of one light source module to the other. Linear illumination light having a constant width that spreads at an angle to the substrate of the light source module is formed. Accordingly, the illumination light can be lengthened as compared with the case where the light emitting elements of the two light source modules are arranged to face in the same direction. As a result, a linear irradiation range can be formed by a small number of light source modules. Further, since the divergent light from the light emitting element is distributed using the light source lens and the first and second reflectors, the light source module is formed as compared with the case where the light is distributed using only the reflector. It becomes easy to make illumination light into a line having a certain width.

It is a general | schematic perspective view of the illuminating device to which this invention is applied. It is the perspective view and sectional drawing for demonstrating an illuminating device main body. It is the perspective view and sectional drawing for demonstrating a light source unit. It is a perspective view of a light source module. It is the top view and sectional drawing for demonstrating a light source module. It is the fan graph and contour line graph which show the light distribution characteristic of a light emitting element. It is sectional drawing for demonstrating a light source lens. It is the fan graph and contour line graph which show the light distribution characteristic of a light source module. It is explanatory drawing which shows the state which installed multiple illuminating devices of this example. It is an illuminance distribution figure of the irradiation plane at the time of installing a plurality of lighting devices at intervals of 40 m. It is an illuminance distribution figure of the irradiation plane at the time of installing two or more illuminating devices at an interval of 26m. It is the top view and sectional drawing of the light source module of the reference example used for an illuminating device. 13 is a fan graph and a contour line graph showing the light distribution characteristics of the light emitting element of FIG. 12. 13 is a fan graph and a contour line graph showing the light distribution characteristics of the light source module of FIG. 12.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

(overall structure)
FIG. 1 is a schematic perspective view of a lighting device to which the present invention is applied. The lighting device 1 of the present invention is attached to a support column 100 standing upright from the ground, and is used, for example, to illuminate a production line extending linearly in a factory. The lighting device 1 includes a box-shaped upper case 2a attached to the support column 100 with the opening facing downward, and a transparent resin made to close the opening from the lower side of the upper case 2a. A lower case 2b, and a lighting device body 3 housed inside the upper case 2a and the lower case 2b. The illuminating device 1 has a front end portion located above the rear end portion attached to the support column 100, and the illuminating device body 3 is also inclined at the same angle as the illuminating device 1. The illuminating device 1 illuminates the planar area 200 from obliquely above the planar area 200 to be irradiated. The illumination device 1 emits linear illumination light that is long in the device width direction and has a constant width in the device front-rear direction. A linear illumination range is formed in the planar area 200 to be irradiated.

  2A is a perspective view of the illuminating device main body 3 mounted on the illuminating device as viewed from below, and FIG. 2B is a cross-sectional view taken along line AA in FIG. 2 (c) is a cross-sectional view taken along line BB in FIG. 2 (a). FIG. 3A is a perspective view of the light source unit 4, and FIG. 3B is a cross-sectional view taken along the line CC in FIG. FIG.3 (c) is sectional drawing in the DD line | wire of Fig.3 (a). 2B and 2C show the linear illumination light from the illuminating device body 3, and the two-dot chain line in FIGS. 3B and 3C shows the illumination light from the light source unit. Show. As shown in FIG. 2, the illuminating device body 3 includes light source units 4 arranged in two rows in the device width direction and four in each row extending in the front-rear direction. Each light source unit 4 is composed of a pair of light source modules 5 arranged adjacent to each other in the device width direction of the illumination device 1.

  As shown in FIG. 3, each light source module 5 includes a rectangular substrate 6 and a light emitting element 7 connected to a wiring pattern formed on the substrate 6. A light source lens 8 is fixed on the surface of the substrate 6 so as to cover the light emitting surface 7 a of the light emitting element 7, and the light emitting element 7 is housed inside the light source lens 8. Each light source module 5 includes a first reflector 9 that extends vertically from a position adjacent to the light source lens 8 to the front of the light emitting surface 7 a, and a direction in which the first reflector 9 is adjacent to the light source lens 8. Are disposed on both sides in a direction orthogonal to each other, and include a pair of second reflectors 10 extending obliquely in a direction away from each other toward the front of the light emitting surface 7a from the substrate 6 and intersecting the first reflector 9. Yes. As shown in FIG. 3C, each light source module 5 includes a first emitted light L1 emitted from the light emitting element 7 to the front of the substrate 6 via the light source lens 8, and a light source. After being refracted through the lens 8, the light is distributed to the second outgoing light L <b> 2 that is reflected by the second reflecting plate 10 and emitted to the front of the substrate 6. The first outgoing light L1 and the second outgoing light L2 form illumination light having a constant width that spreads at an angle formed by the substrate 6 and the first reflector 9.

  Here, the light source units 4 are arranged back to back with the substrates 6 of the two light source modules 5 forming an acute angle. That is, the light emitting surfaces 7 a of the light source elements mounted on the two light source modules 5 are arranged so as to face opposite sides of the substrate 6. As a result, as shown in FIGS. 3B and 3C, the light source unit 4 is a line having a constant width that spreads at an angle between the substrate 6 of one light source module 5 and the substrate 6 of the other light source module 5. Is formed. Therefore, as shown in FIGS. 2B and 2C, the illumination device main body 3 is connected to the other light source module of the other light source unit 4 from the substrate 6 of one of the light source units 4 in the device width direction. The linear illumination light having a constant width that spreads at an angle between 5 and the substrate 6 is formed.

  In this example, as shown in FIG. 3B, the crossing angle θ formed by the substrates 6 of the two light source modules 5 constituting one light source unit 4 is 30 °. By adjusting the intersection angle θ, the irradiation range in the longitudinal direction of the linear irradiation light emitted from the light source unit 4 can be set. In addition, the board | substrate 6 of the two light source modules 5 can also be arrange | positioned in parallel.

  In addition, as shown in FIG. 1, the illumination device 1 is attached to the support column 100 in an inclined state, so that the illumination device main body 3 is inclined in the front-rear direction of the device. Compared to the case where 3 is parallel to the planar area 200 to be irradiated, the width in the short direction is wider. In addition, the width | variety of the transversal direction of the irradiation range by the illuminating device 1 can be set by adjusting the angle of the front-back direction of the illuminating device 1 with respect to the planar area 200 of irradiation object, ie, the angle which attaches the illuminating device 1 to the support | pillar 100. .

(Light source module)
FIG. 4 is a schematic perspective view of the light source module 5 of this example. 5A is a plan view of the light source module 5, FIG. 5B is a cross-sectional view of the light source module 5 cut along the XZ plane, and FIG. 5C is a cross section of the light source module 5 cut along the YZ plane. It is sectional drawing. In the following description, in the light source module 5, the light emission center point P of the light emitting surface 7a of the light emitting element 7 is defined as the origin O, and the two axes orthogonal to the origin O and extending on the same plane as the light emitting surface 7a are the X axis and the Y axis. The axis extending perpendicularly from the origin O to the front of the light emitting surface 7a will be described as the Z axis. Further, the description will be made assuming that one of the X-axis directions is a plus direction and the other is a minus direction.

  The light source module 5 includes a substrate 6, a light emitting element 7 fixed on the surface of the substrate 6, and a light source lens 8 fixed on the surface of the substrate 6 so as to cover the light emitting surface 7 a of the light emitting element 7. The side of the light source lens 8 in the Z-axis direction and the positive side of the X-axis are in an open state, and the first reflector 9 is disposed adjacent to the negative direction of the X-axis of the light source lens 8. A pair of second reflectors 10 are adjacently disposed on both sides of the light source lens 8 in the Y-axis direction.

(Light emitting element)
6A is a fan graph showing the light distribution characteristics of the light-emitting element 7 in terms of zenith angle and relative azimuth angle, and FIG. 6B shows the light distribution characteristics of the light-emitting element 7 in terms of azimuth angle and zenith angle relative value. It is a contour-line graph to show. In this example, the light emitting element 7 used as the light source is a light emitting diode that emits divergent light, and as shown in FIG. 6, the light distribution shows a Lambertian distribution.

(Light source lens)
7A is a side view of the light source lens 8 viewed from the Y-axis direction, and FIG. 7B is a cross-sectional view of the light source lens 8 cut along the YZ plane. The light source lens 8 is formed by injection molding a light transmissive resin such as an epoxy resin or a polycarbonate resin. As shown in FIG. 4 and FIG. 5A, the light source lens 8 includes a first portion 11 located on the plus side of the X axis with respect to the YZ plane and a second portion located on the minus side of the X axis with respect to the YZ plane. A region 12 is provided. The first part 11 controls the light distribution of the divergent light from the light emitting element 7 that passes through the positive side of the X axis from the YZ plane, and the second part 12 of the divergent light from the light emitting element 7 from the YZ plane. Also controls the light distribution of light passing through the negative side of the X axis.

  The first portion 11 is a pair of first central lens portions (central lens portions) 13 located in front of the light emitting surface 7a in the Z-axis direction and a pair of ends formed on the both ends of the first central lens portion 13 in the Y-axis direction. A first side lens portion (side lens portion) 14 is provided. The second portion 12 is formed at the end of the first central lens portion 13 in the minus direction of the X axis and the end of the first side lens portion 14 in the minus direction of the X axis. A pair of second side lens portions 16 are formed.

  The first central lens portion 13 has a cross-sectional shape when cut along a plane including the X-axis, as shown in FIG. 5B, allows the diverging light from the light emitting element 7 to pass through without being refracted. ing. Further, the cross-sectional shape when cut along the plane including the Y-axis has a positive power for refracting the diverging light from the light emitting element 7 in the direction of the XZ plane, as shown in FIG. 5C. ing. In other words, the first central lens portion 13 acts so that only the y component approaches 0 when the light passing through the portion is represented by an (x, y, z) component.

  Each of the first lateral lens portions 14 has a positive power for refracting diverging light from the light emitting element 7 in the direction of the YZ plane when cut along a plane including the X axis. Yes. Further, the cross-sectional shape when cut along the plane including the Y-axis has a positive power for refracting the diverging light from the light emitting element 7 in the direction of the XY plane, as shown in FIG. 5C. ing. In other words, the first side lens portion 14 acts to bring the z component and the x component closer to 0 when the light passing through the portion is represented by an (x, y, z) component.

  The first central lens portion 13 and the pair of first side lens portions 14 are rotating bodies 20 obtained by rotating the same sectional shape 20a shown in FIG. 7B around the Y axis. As shown by the arrow in (a), it is formed over an angle range of 90 ° from the XY plane toward the minus direction of the X axis.

  Here, on the YZ plane shown in FIG. 7B, the same cross-sectional shape 20a is symmetric with respect to the Z axis, and intersects with the Z axis and protrudes forward of the Z axis. A pair of second arc portions 22 each projecting in the Y-axis direction from both ends of the first arc portion 21 are provided. The center 21a of the circle that defines the first arc portion 21 is located forward from the light emitting surface 7a on the Z axis. Further, the circle centers 22a defining the pair of second arc portions 22 are located on the Y axis away from the light emitting surface 7a. As shown in FIG. 5 (a), the shape of the outer surface 13 a of the first central lens portion 13 is defined by the first arc portion 21, and the pair of first side lens portions is defined by the pair of second arc portions 22. The shape of the outer surface 14a of 14 is prescribed | regulated.

  Between the rear ends of the pair of second arc portions 22 in the Z-axis direction, as shown in FIG. 7B, a first linear portion 23 extending on the Y axis from the rear end of one second arc portion 22 and The second linear portion 24 extending forward in the Z-axis direction from the end of the first linear portion 23, the third linear portion 25 extending in the Y-axis direction from the end of the second linear portion 24, and the end of the third linear portion 25 And a fourth straight line portion 26 extending rearward in the Z-axis direction and a fifth straight line portion 27 extending on the Y-axis from the end of the fourth straight line portion 26 to the rear end of the other second arc portion 22. . The dimension of the third linear portion 25 is the same as the dimension of the first arc portion 21 in the Y-axis direction. A first recess 28 formed inside the first central lens portion 13 and the first side lens portion 14 by the second straight portion 24, the third straight portion 25, and the fourth straight portion 26 (FIG. 7A). Shape) is defined.

  Next, the second central lens portion 15 and the pair of second side lens portions 16 are arranged on the end surfaces of the first central lens portion 13 and the first side lens portion 14 on the YZ plane, that is, in FIG. This is a translational body obtained by translating an end face having the same cross-sectional shape 20a shown in the minus direction of the X axis by a predetermined length. More specifically, the shape of the outer surface 15a of the second central lens portion 15 is defined by the first arc portion 21 having the same cross-sectional shape 20a, and the outer surface of the second side lens portion 16 is defined by the second arc portion 22. The shape of 16a is defined. Further, the shape of the second concave portion 29 formed inside the second central lens portion 15 and the second side lens portion 16 is defined by the second straight portion 24, the third straight portion 25 and the fourth straight portion 26. Has been.

  Thereby, the second central lens portion 15 has a cross-sectional shape when cut along a plane including the X axis, and allows the diverging light from the light emitting element 7 to pass through in a diverging state as shown in FIG. 5B. The cross-sectional shape when cut along a plane including the Y axis has a positive power that refracts the diverging light from the light emitting element 7 in the direction of the XZ plane. In other words, the second central lens portion 15 acts so that only the y component approaches 0 when the light passing through the portion is represented by the (x, y, z) component.

  Further, the pair of second side lens portions 16 has a cross-sectional shape when cut along a plane including the X axis, and allows diverging light from the light emitting element 7 to pass through in a divergent state, and the Y axis is The cross-sectional shape in the case of cutting along the plane including the surface has a positive power that refracts the diverging light from the light emitting element 7 in the direction of the XY plane, like the first side lens portion 14 shown in FIG. It has become a thing. In other words, the second side lens portion 16 acts so that only the z component approaches 0 when the light passing through the portion is represented by the (x, y, z) component.

  The light emitting element 7 is housed in a space formed on the substrate 6 by the first concave portion 28 and the second concave portion 29, and the light source lens 8 has the light emitting surface 7a of the light emitting element 7 viewed from the front in the Z-axis direction. Covering. More specifically, the first portion 11 covers the plus side of the X axis of the light emitting surface 7a from the front in the Z axis direction, and the second portion 12 covers the minus side of the X axis of the light emitting surface 7a in the front of the Z axis direction. Covering from.

  In this example, of the diverging light emitted from the light emitting element 7 and passing through the positive side of the X axis from the YZ plane, the light emitted in the direction of about 0 ° to 45 ° with respect to the XZ plane is the first central lens. The portion 13 is transmitted. As shown in FIG. 5C, the light passing through the first central lens portion 13 is refracted in the direction of the XZ plane, and the transmitted light is emitted in a direction parallel to the XZ plane.

  Of the diverging light emitted from the light emitting element 7 and passing through the positive side of the X axis from the YZ plane, the light emitted in the direction of about 45 ° to 90 ° with respect to the XZ plane is the first side lens portion. 14 is passed. The light passing through the first side lens portion 14 is refracted in the direction of the YZ plane and the direction of the XY plane, and the transmitted light is emitted in a direction parallel to the YZ plane and the XY plane.

  Further, the light emitted from the light emitting element 7 and passing through the negative side of the X axis from the YZ plane is emitted in the direction of about 0 ° to 45 ° with respect to the Z axis except for a part thereof. Directly through the second central lens portion 15. The light passing through the second central lens portion 15 is refracted in the direction of the XZ plane, and the transmitted light is emitted in a direction parallel to the XZ plane.

  Of the diverging light emitted from the light emitting element 7 and directed to the negative side of the X axis from the YZ plane, the light emitted in the direction of about 45 ° to 90 ° with respect to the Z axis is excluded except for a part. Directly through the second lateral lens portion 16. The light passing through the second side lens portion 16 is directed in the negative direction of the X axis and refracted in the direction of the XY plane, and the transmitted light is emitted in a direction parallel to the XY plane.

  Of the diverging light radiated from the light emitting element 7 and directed to the negative side of the X axis from the YZ plane, a part of the light that does not reach the second central lens portion 15 or the second side lens portion 16 directly. The light is reflected by the first reflecting plate 9 toward the YZ plane and then passes through the light source lens 8.

(First reflector)
The first reflecting plate 9 includes a first reflecting surface 9a that is parallel to the YZ plane and faces the light source lens 8 side. As shown in FIG. 5B, the first reflecting surface 9a reflects the transmitted light of the second central lens portion 15 directed in the negative direction of the X axis in the direction of the YZ plane. In this example, the dimension of the first reflecting plate 9 in the Z-axis direction is at least twice the height dimension of the light source lens 8 in the Z-axis direction.

(Second reflector)
As shown in FIG. 5C, each of the pair of second reflecting plates 10 faces the light source lens 8 side and is inclined in a direction away from the XZ plane toward the front of the Z axis. 10a. In the present example, the second reflecting surface 10 a is inclined by 45 ° with respect to the light emitting surface 7 a of the light emitting element 7. The second reflecting surface 10a reflects the transmitted light from the first side lens portion 14 and the transmitted light from the second side lens portion 16 in the direction of the XZ plane.

  Here, the light passing through the first side lens portion 14 is refracted in the direction of the XY plane and the direction of the YZ plane. The light passing through the second side lens portion 16 is radiated in the minus direction of the X axis from the YZ plane, and is refracted in the direction of the XY plane. Therefore, compared with the case where the light passing through the first side lens portion 14 and the light passing through the second side lens portion 16 are not refracted, these transmitted lights are transmitted in the X-axis direction and the Z-axis direction. It can be reflected by a small reflector in the axial direction. In this example, the front ends of the pair of second reflecting plates 10 in the Z-axis direction are positioned slightly above the front ends of the light source lens 8 in the Z-axis direction.

(Light distribution characteristics of light source module)
FIG. 8A is a fan graph showing the light distribution characteristics of the light source module 5 in terms of zenith angle and azimuth angle relative value, and FIG. 8B shows the light distribution characteristics of the light source module 5 in terms of azimuth angle and zenith angle relative value. It is a contour-line graph to show. According to this example, the transmitted light that has passed through the first central lens portion 13 and the second central lens portion 15 out of the divergent light from the light emitting element 7 has a reduced width in the Y-axis direction along the XZ plane. It becomes the linear 1st emitted light L1 (refer FIG.3 (c)).

  Further, according to the present example, of the diverging light from the light emitting element 7, the light transmitted through the first side lens portion 14 is refracted in the direction parallel to the XY plane and the YZ plane, and the second side The light passing through the rectangular lens portion 16 is emitted toward the negative direction of the X axis from the YZ plane and is refracted in the direction of the XY plane. As a result, the transmitted light from the first side lens portion 14 and the transmitted light from the second side lens portion 16 are emitted in a direction that does not overlap with the transmitted light from the first central lens portion 13 and the second central lens portion 15. However, the transmitted light is reflected by the second reflecting plate 10 in a direction parallel to the XZ plane including the Z axis, and becomes the second emitted light L2 (see FIG. 3C).

  As a result of the light distribution control as described above, according to the first emitted light L1 and the second emitted light L2 emitted from the light source module 5, as shown in FIG. Can be obtained.

  In this example, since the light source lens 8 includes the second central lens portion 15 that continues in the negative direction of the X axis of the first central lens portion 13, the linear irradiation range by the light source module 5 becomes long.

  Further, in this example, the first reflecting plate 9 disposed in the negative X-axis direction of the light source lens 8 reflects the transmitted light of the second central lens portion 15 directed in the negative X-axis direction to the YZ plane side. , The luminous intensity of the irradiation range is increased.

(Light distribution characteristics of lighting equipment)
FIG. 9 is an explanatory view showing a state in which a plurality of lighting devices 1 of this example are installed. FIG. 9A shows an irradiation plane located between the two lighting devices 1, and FIG. The position of the illuminating device 1 with respect to the planar area 200 to be irradiated is shown. FIG. 10 is an illuminance distribution diagram simulating the illuminance on the irradiation plane between the illuminating device 1 and the illuminating device 1 when a plurality of illuminating devices 1 are installed at intervals of 40 m, and FIG. It is the illumination intensity distribution figure which simulated the illumination intensity in the irradiation plane between the illuminating device 1 and the illuminating device 1 in the case where it did. In either case, the simulation was performed with the lower case 2b not attached.

  In the illuminating device 1, each of the light emitting elements 7 serving as light sources has an emitted light beam of 85 cd. Moreover, the reflectance of the 1st reflective plate 9 and the 2nd reflective plate 10 is 86%, and the omnidirectional emitted light efficiency of the illuminating device 1 is 77.6%.

  As shown to Fig.9 (a), the illuminating device 1 is arrange | positioned with the fixed installation space | interval M so that the linear illumination light of the adjacent illuminating device 1 may overlap in the longitudinal direction along the plane area | region 200 of irradiation object. It is. Moreover, as shown in FIG.9 (b), the illuminating device 1 inclines at an angle of 24 degrees with respect to the plane area 200 of irradiation object in the height position of 4.5 m from the plane area 200 of irradiation object. Is attached. Accordingly, each light source unit 4 mounted on the illuminating device body 3 is also inclined at an angle of 24 ° with respect to the planar area 200 to be irradiated.

  When a plurality of illumination devices 1 are installed at an installation interval M of 40 m, the irradiation plane 200A between the illumination devices 1 and 1 has a length of 40 m and a width of 5 meters. The incident light flux on the irradiation plane 200A is 988.84 cd, and as shown in FIG. 10, the average horizontal illuminance on the irradiation plane 200A, that is, the average illuminance on the irradiation plane 200A is 4.9 cd. Also, the vertical plane illuminance, that is, the average illuminance of the vertical plane at a position 1.5 m from the irradiation plane 200A in the center line shape in the width direction of the irradiation plane 200A is 1.02 cd.

  When a plurality of illumination devices 1 are installed at an installation interval M of 26 m, the irradiation plane 200A between the illumination devices 1 and the illumination device 1 has a length of 26 m and a width of 5 meters. The incident light flux on the irradiation plane 200A is 966.96 cd, and as shown in FIG. 11, the average horizontal illuminance on the irradiation plane 200A is 7.4 cd. Moreover, the vertical surface illuminance in the irradiation plane 200A is 2.93 cd.

(Function and effect)
According to the present invention, each light source module 5 constituting the light source unit 4 distributes the diverging light from the light emitting element 7 using the light source lens 8, the first reflecting plate 9, and the second reflecting plate 10. The light source module 5 emits illumination light having a constant width that spreads at an angle formed by the substrate 6 on which the light emitting element 7 is mounted and the first reflector 9. Therefore, compared with the case where the light source module 5 distributes the divergent light from the light emitting element 7 by the cylindrical mirror surrounding the light emitting element 7, the angle range of the illumination light emitted from the light source module 5 is widened. be able to. In the light source unit 4, the substrates 6 of the two light source modules 5 on which the light emitting elements 7 are mounted are arranged back to back in a parallel or acute angle state. That is, in the light source unit 4, the light emitting elements 7 mounted on each of the two light source modules 5 are arranged so as to face each other with the substrate 6 interposed therebetween. Linear illumination light having a constant width that spreads at an angle between the substrate 6 of the module 5 and the substrate 6 of the other light source module 5 is formed. Therefore, compared with the case where the light emitting elements 7 of the two light source modules 5 are arranged so as to face in the same direction, the illumination light can be lengthened. Therefore, a linear irradiation range can be formed by a small number of light source modules 5. In addition, since divergent light from the light emitting element 7 is distributed using the light source lens 8, the first reflecting plate 9, and the second reflecting plate 10, compared to the case where light is distributed using only the reflecting plate, It becomes easy to make the illumination light formed by the light source module 5 into a line having a certain width.

  Here, the first central lens portion 13 may have a shape that mainly brings the y component close to 0 when the light passing through the portion is represented by the (x, y, z) component. It is not necessary to maintain the z component as it is.

  The first side lens portion 14 may have a shape that mainly brings the z component and the x component close to 0 when the light passing through the portion is represented by an (x, y, z) component. It is not necessary to maintain the y component as it is.

  The second central lens portion 15 may be shaped so that only the y component approaches 0 when the light passing through the portion is represented by the (x, y, z) component. It does not have to be maintained as it is.

  The second side lens portion 16 only needs to have a shape that allows only the z component to approach 0 when the light passing through the portion is represented by an (x, y, z) component. Need not be maintained.

  In addition, it is possible to arrange the shape in this way also in a light source lens of another light source module described later.

(Light source module of reference example that can be used for lighting device)
Next, a light source module of a reference example that can be used for the lighting device 1 will be described. 12A is a plan view of the light source module of this example, FIG. 12B is a cross-sectional view of the light source module of this example cut along the XZ plane, and FIG. 12C is the light source module of this example. It is sectional drawing which cut | disconnected YZ plane. In the description of the present example, in the light source module 5A, a position that is on the same plane as the light emitting surface 7a of the light emitting element 7 ′ on the substrate 6 and deviates from the light emission center point P of the light emitting surface 7a ′ is defined as an origin O. The axis extending through O and the light emission center point P is the X axis, the origin O is orthogonal to the X axis and the same plane as the light emitting surface 7a 'is the Y axis, and the origin O is orthogonal to the X axis and the Y axis. The light source module 5A will be described with the axis extending in front of the light emitting surface 7a 'as the Z axis. As shown in FIGS. 12A and 12B, the origin O is a position deviated from the light emitting surface 7a ′ of the second light emitting element 7 ′ and in the vicinity of the outer peripheral edge of the light emitting surface 7a ′.

  Since the light source module 5A has the same configuration as the light source module 5 described above, the corresponding parts are denoted by the same reference numerals and description thereof is omitted. Further, when the light source module 5A of this example is mounted on the lighting device 1, the two light source modules 5A are arranged adjacent to each other so that the substrates 6 are back-to-back, similarly to the case where the light source module 5 is mounted on the lighting device 1. Thus, the light source unit 4 is configured, and the eight light source units 4 are arranged in two rows of four, thereby configuring the lighting device body 3.

(Light emitting element)
The light distribution characteristics of the second light emitting element 7 ′ are shown in FIG. FIG. 13A is a fan graph showing the light distribution characteristics of the second light emitting element 7 ′ in terms of zenith angle and relative azimuth angle, and FIG. 13B shows the light distribution characteristics of the second light emitting element 7 ′. It is a contour line graph shown by an azimuth angle and a zenith angle relative value. The second light emitting element 7 'is a so-called high brightness type light emitting diode.

(Light source lens)
The light source lens 8 ′ includes a central lens portion 33 positioned in front of the light emitting surface 7a ′ of the light emitting element 7 ′ in the Z-axis direction and a pair of side lenses formed at both ends of the central lens portion 33 in the Y-axis direction. A portion 34 is provided. When the light source lens 8 ′ is viewed from the plus side in the X-axis direction, the central lens portion 33 has a right lens portion 331 located on the right side in the Y-axis direction across the XZ plane and a left lens portion 332 located on the left side. It has. The right lens portion 331 and the left lens portion 332 are plane symmetric with respect to the XZ plane.

  The central lens portion 33 has a cross-sectional shape when cut along a plane including the X axis, as shown in FIG. 12B, and allows the diverging light from the second light emitting element 7 ′ to pass through in the divergent state. Has been. Further, the cross-sectional shape of the central lens portion 33 when cut along the plane including the Y axis is such that the diverging light from the second light emitting element 7 'is refracted in the direction of the XZ plane as shown in FIG. It is said to have positive power to make.

  Each of the side lens portions 34 has a positive power that refracts the diverging light from the second light emitting element 7 ′ in the direction of the YZ plane when cut along a plane including the X axis. As shown in FIG. 12C, the cross-sectional shape when cut along the plane including the Y axis has a positive power that refracts the diverging light from the second light emitting element 7 ′ in the direction of the XY plane. It is supposed to have.

  Here, the central lens portion 33 and the pair of side lens portions 34 are rotating bodies 40 obtained by rotating the same cross-sectional shape 40a shown in FIG. 12B around the Y axis, as shown in FIG. As shown by the arrow in b), it is formed over an angle range of 90 ° from the XY plane toward the minus direction of the X axis.

  The same sectional shape 40a is symmetrical with respect to the Z axis on the YZ plane shown in FIG. 12C, and the convex curve portion 41 protruding forward in the Z axis direction and the light source lens 8 ′ are arranged in the X axis direction. When viewed from the plus side, a pair of arc portions 42 are provided that protrude in the Y direction from the left and right ends of the convex curve portion 41, respectively.

  The convex curve portion 41 includes a right convex curve portion 411 located on the right side with respect to the Z axis and a left convex curve portion 412 located on the left side, and the right convex curve portion 411 defines the outer surface 331a of the right lens portion 331. The shape is defined, and the shape of the outer surface 332 a of the left lens portion 332 is defined by the left convex curve portion 412. Therefore, the shape of the outer surface 33 a of the central lens portion 33 is defined by the right convex curve portion 411 and the left convex curve portion 412.

  The pair of arc portions 42 includes a right arc portion 421 positioned on the right side with the Z-axis interposed therebetween, and a left arc portion 422 on the left side. The center 42a of the circle defining the right arc portion 421 and the left arc portion 422 on the left side is at a position away from the light emitting surface 7a ′ on the Y axis. The shape of the outer surface 34 a of the pair of side lens portions 34 is defined by the pair of arc portions 42.

  Here, the right-side convex curve portion 411 and the right-side arc portion 421 located on the right side of the Z-axis of the pair of arc portions 42 are inclined at an angle of 45 ° to the right side with respect to the Z-axis. The left convex curve portion 412 and the left circular arc portion 422 located on the left side of the Z axis are inclined at a 45 ° angle to the left side with respect to the Z axis. It is line-symmetric with respect to the symmetry axis N2.

  Between the rear ends of the pair of arc portions 42, a first linear portion 43 extending on the Y axis from the rear end of the right arc portion 421 toward the right side, and the Z-axis direction forward from the end of the first linear portion 43. A second linear portion 44 extending, a third linear portion 45 extending from the end of the second linear portion 44 in the Y-axis direction so as to incline forward in the Z-axis direction, and a Y-axis direction from the end of the third linear portion 45 From the end of the fourth linear portion 46, the fourth linear portion 46 extending obliquely rearward in the Z-axis direction, the fifth linear portion 47 extending rearward from the end of the fourth linear portion 46, and the end of the fifth linear portion 47 It is made to continue by the 6th linear part 48 extended on a Y-axis to the rear end of the left circular arc part 422. The dimension in the Y-axis direction of the third linear portion 45 is the same as the dimension in the Y-axis direction of the right convex curve portion 411, and the dimension in the Y-axis direction of the fourth linear portion 46 is the same as that of the left convex curve portion 412. It is the same as the dimension in the Y-axis direction. Further, the shape of the recess 49 formed inside the central lens portion 33 and the side lens portion 34 is defined by the second straight portion 44, the third straight portion 45, the fourth straight portion 46, and the fifth straight portion 47. Has been.

  Here, the second light emitting element 7 ′ is accommodated in a space formed on the substrate 6 by the recess 49. The light source lens 8 ′ covers the light emitting surface 7a ′ of the second light emitting element 7 ′ from the front in the Z-axis direction.

  In this example, of the diverging light from the second light emitting element 7 ′, the light emitted in the direction of about 0 ° to 45 ° with respect to the XZ plane is directly excluded from the central lens portion 33 except for a part thereof. Transparent. The light transmitted through the central lens portion 33 is refracted in the direction of the XZ plane, and the transmitted light is emitted in a direction parallel to the XZ plane. Of the light transmitted through the central lens portion 33, light whose X direction is in the negative direction of the X axis is reflected by the first reflecting plate 9 in the YZ plane direction. These become the first outgoing light L1 (see FIG. 3C).

  Of the divergent light from the second light emitting element 7 ′, light emitted in a direction of approximately 45 ° to 90 ° with respect to the XZ plane is directly applied to the side lens portion 34 except for a part thereof. pass. The light passing through the side lens portion 34 is refracted in the direction of the YZ plane and the direction of the XY plane, and the transmitted light is emitted in a direction parallel to the YZ plane and the XY plane. Thereafter, the transmitted light from the side lens portion 34 is reflected by the second reflecting plate 10 in the direction of the XZ plane. These become the 2nd emitted light L2 (refer FIG.3 (c)).

  Of the light emitted from the second light emitting element 7 ′ in the direction of about 0 ° to 45 ° with respect to the XZ plane, a part of the light not directly reaching the central lens portion 33 and the XZ plane Of the light emitted in the direction of approximately 45 ° to 90 °, a part of the light that does not directly reach the side lens portion 34 is reflected in the direction of the YZ plane by the first reflecting plate 9, and passes through the light source lens 8 ′. To Penetrate.

(Light distribution characteristics)
FIG. 14A is a fan graph showing the light distribution characteristics of the light source module 5A in terms of zenith angle and azimuth angle relative values, and FIG. 14B shows the light distribution characteristics of the light source module 5A in terms of azimuth angles and zenith angle relative values. It is a contour-line graph to show. As shown in FIG. 14, according to the light source module 5A of the present example, the emission angle in the Y-axis direction is narrowed, and a linear irradiation range is formed on the side of the azimuth angle 240 °. Further, according to the light source module 5A, the central lens portion 33 is composed of the right lens portion 331 and the left lens portion 332, so that the light beams having the zenith angle of 90 ° and the azimuth angle of 240 ° are dispersed. Illumination light thicker than the module 5 can be obtained. If such a light source module 5 </ b> A is mounted on the illumination device 1, a linear irradiation range can be formed by the illumination device 1.

Note that a light source module using a light source lens 8 ″ having the same shape as the first portion 11 of the light source lens 8 may be configured instead of the light source lens 8 ′ of the reference example . Since the linear illumination light can be obtained also by such a light source module 5, the linear illumination range can be formed by mounting the illumination device 1 on the illumination device 1.
(Other embodiments)
Note that the number and arrangement of the light source units 4 used in the lighting device 1 are not limited to the above example, and the number of rows and the number can be increased or decreased so as to match the shape of the planar region 200 to be irradiated. . Moreover, the illuminating device 1 of this example can also be installed along a road as a crime prevention light.

1. Lighting device, 2a, upper case, 2b, lower case, 3. Lighting device body, 4. Light source unit, 5. 5A, Light source module, 6. Substrate, 7.7 ', Light emitting element, 7.a, 7a'. Light emitting surface, 8 · 8 ′ · Light source lens, 9 · Reflecting plate, 9a · Reflecting surface, 10 · Reflecting plate, 10a · Reflecting surface, 11 · First part, 12 · Second part, 13 · First central lens part 13a · outer surface, 14 · first lateral lens portion, 14a · outer surface, 15 · second central lens portion, 15a · outer surface, 16 · second lateral lens portion, 16a · outer surface, 20 · rotation Body, 20a / same cross-sectional shape, 21 / first arc portion, 21a / center, 22 / second arc portion, 22a / center, 23 / first straight portion, 24 / second straight portion, 25 / third straight portion , 26 · fourth straight portion, 27 · fifth straight portion, 28 · first recess, 29 · second Part, 33 / central lens part, 33a / outer surface, 34 / side lens part, 34a / outer surface, 40 / rotary body, 40a / same sectional shape, 41 / convex curve part, 42 / arc part, 42a / center , 43 · 1st straight portion, 44 · 2nd straight portion, 45 · 3rd straight portion, 46 · 4th straight portion, 47 · 5th straight portion, 48 · 6th straight portion, 49 · recess, 100 · prop , 200 · Planar area, 200A · Irradiation plane, 331 · Right lens portion, 331a · Outer surface, 332 · Left lens portion, 332a · Outer surface, 411 · Right convex curve portion, 412 · Left convex curve portion, 421 · Right side Arc part, 422, left arc part, L1, first outgoing light, L2, second outgoing light, M, spacing, N1, symmetry axis, N2, symmetry axis, O, origin, P, emission center point

Claims (4)

A light source unit comprising two light source modules;
The light source module is
A substrate,
A light emitting element mounted on the surface of the substrate;
A light source lens mounted on the surface of the substrate in a state of covering the light emitting surface of the light emitting element;
A first reflecting plate extending at a predetermined angle from the position adjacent to the light source lens on the substrate toward the front of the light emitting surface;
The first reflection plate is disposed on both sides of the light source lens in a direction orthogonal to the direction adjacent to the light source lens, and obliquely extends from the substrate toward the front of the light emitting surface in a direction away from each other. A pair of second reflectors intersecting the plate,
The divergent light emitted from the light emitting element is reflected by the first reflecting light emitted in front of the substrate through the light source lens and the second reflecting plate after being refracted through the light source lens. Is distributed to the second outgoing light emitted in front of the substrate, and the first outgoing light and the second outgoing light form illumination light having a constant width that spreads at an angle formed by the substrate and the first reflector. Is supposed to
The light source units are arranged back to back with the substrates of the two light source modules in parallel or at an acute angle, and spread at an angle between the substrate of one of the light source modules and the substrate of the other light source module. It is designed to form linear illumination light with a certain width ,
In the light source module, the light emission center point of the light emitting surface of the light emitting element on the substrate is an origin, and two axes that are orthogonal to the origin and extend on the same plane as the light emitting surface are an X axis, a Y axis, and the origin. When the axis extending perpendicularly to the front of the light emitting surface is the Z axis,
The light source lens includes a central lens portion positioned in front of the Z-axis direction, and side lens portions respectively formed at both ends of the central lens portion in the Y-axis direction,
The central lens portion has a cross-sectional shape when cut along a plane including the X axis and allows the diverging light to pass through in a divergent state, and a cross-sectional shape when cut along a plane including the Y axis is the divergence. It is assumed to have a positive power to refract light in the direction of the XZ plane,
Each of the side lens portions has a cross-sectional shape when cut along a plane including the X-axis, and has a positive power that refracts the diverging light in the direction of the YZ plane, and includes a plane including the Y-axis. The cross-sectional shape when it is cut with a positive power to refract the diverging light in the direction of the XY plane.
It is said that
The light transmitted through the central lens portion is the first outgoing light, and the light reflected by the pair of second reflectors after passing through the side lens portion is the second outgoing light. Lighting device. In claim 1,
As the light source unit, it has first and second light source units,
The first and second light source units are arranged so that a part of the linear illumination light in the longitudinal direction overlaps each other. In claim 1,
As the light source unit, it has first and second light source units,
The first and second light source units are arranged so that the linear illumination light of the first light source unit and the linear illumination light of the second light source unit are continuous in their width direction. A lighting device. In any one of claims 1 to 3,
The light source lens includes a second central lens portion formed continuously on an end surface on the YZ plane in the central lens portion, and a second side formed continuously on an end surface on the YZ plane in each of the side lens portions. With a lens part,
Each of the central lens portion and the side lens portion is a rotating body obtained by rotating the same cross-sectional shape around the Y axis, and an angular range of 90 ° from the XY plane toward the negative direction of the X axis. Formed over the
The second central lens part is a translation body obtained by translating the end face on the YZ plane of the central lens part by a predetermined length in the negative direction of the X axis,
The second side lens part is a translation body obtained by translating the end face on the YZ plane of the side lens part by a predetermined length in the negative direction of the X axis,
The light transmitted through the central lens portion and the light transmitted through the second central lens portion are the first emitted light, and the light reflected by the pair of second reflectors after passing through the side lens portion, and The illuminating device characterized in that the light reflected by the pair of second reflecting plates after passing through the second side lens portion is the second emitted light.