Lighting device

Abstract

To provide a lighting device that can improve maintainability. [Solution] A lighting device according to one embodiment of the present invention comprises a first lighting fixture having a first light source module that emits first light toward the road surface and a first casing that houses the first light source module, and a second lighting fixture that is capable of emitting light and can be attached to the first casing in any orientation.

Description

Technical Field

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[0001] The present invention relates to a lighting device used, for example, for lighting highways.

Background Art

[0002] [ As a lighting lamp installed on a highway or the like, a low-position lighting method in which a lighting fixture is installed at a low position about 1 m from the road surface is used.

[0003] As this type of low-position lighting device, for example, in Patent Document 1, a linear light that illuminates a low position and a planar light that illuminates above the low position illuminated by the linear light are emitted, and when the emission direction of the linear light is horizontal, a lighting device is disclosed in which the optical axis of the planar light is inclined with respect to the vertical direction orthogonal to the horizontal direction.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In a conventional low-position lighting device, when units with different light distribution controls are integrated, if the optical axis of one is adjusted, the optical axis of the other will shift, resulting in a problem that it takes a lot of labor to adjust. Also, when one unit fails, it is necessary to repair and replace them integrally. < / /

[0006] In view of the above circumstances, an object of the present invention is to provide a lighting device capable of improving maintainability.

Means for Solving the Problems

[0007] A lighting device according to one embodiment of the present invention comprises a first lighting fixture and a second lighting fixture. The first lighting fixture described above comprises a first light source module that emits first light toward the road surface, and a first casing that houses the first light source module. The second lighting fixture described above is capable of emitting light and can be mounted in any orientation relative to the first casing described above.

[0008] The above-described lighting device is configured such that a second lighting fixture having a different light source is attached to a first casing that houses a first light source module that emits a first light. This allows for maintenance and replacement of each unit even if one unit (lighting fixture) malfunctions, thereby improving maintainability.

[0009] The second lighting fixture described above may include a second light source module that emits a second light having a different emission range from the first light described above, and a second casing that can be attached to the first casing in any orientation and houses the second light source module.

[0010] The light emitted from the second lighting fixture described above may be emitted in a direction aligned with the direction of travel on the road.

[0011] The light emitted from the second lighting fixture described above may be emitted in the direction ahead of the road in the direction of travel described above.

[0012] The first light source module described above may include one or more light-emitting elements disposed inside the first casing and having an optical axis perpendicular to the direction of travel of the road, and one or more lens portions covering the light-emitting elements and including a lens surface that distributes light in the direction of the optical axis and in an oblique direction inclined at a predetermined angle from the direction of the optical axis to both sides of the direction of travel.

[0013] The second lighting fixture may be installed in the first casing in the direction of travel on the road.

[0014] The second light source module may emit a plurality of second lights with different emission ranges from each other.

[0015] The plurality of second lights emitted from the second light source module may be respectively emitted in a direction along the traveling direction of the road.

[0016] Some of the plurality of second lights may be emitted toward the road surface in front of the traveling direction of the road.

[0017] Some other of the plurality of second lights may be emitted upward from the road surface in front of the traveling direction of the road.

[0018] The second lighting fixture further has a support frame for attaching the second casing to the first casing. The support frame may be capable of adjusting the angle of the second casing with respect to the road surface.

Advantages of the Invention

[0019] According to the present invention, maintainability can be improved.

Brief Description of the Drawings

[0020] [Figure 1] It is an overall view of a lighting device according to a first embodiment of the present invention. [Figure 2] It is a top view of a lighting device according to a first embodiment of the present invention. [Figure 3] It is a perspective view of a first lighting fixture according to a first embodiment of the present invention. [Figure 4] It is a front view (A), a bottom view (B), and a side view (C) of the first lighting fixture. [Figure 5] It is an exploded perspective view of the first lighting fixture. [Figure 6] It is a schematic plan view showing an installation example of the lighting device on a road. [Figure 7] It is a cross-sectional view taken along line A-A in FIG. 4(A). [Figure 8] It is a (A) plan view and (B) side view of the light source module in the above first lighting fixture. [Figure 9] It is an enlarged side view of a main part showing the light distribution characteristic along the X-axis direction of the emitted light transmitted through the lens part in the above first light source module. [Figure 10] It is a ray tracing diagram of the illumination light in the above first lighting fixture. [Figure 11] It is an illuminance distribution diagram in the left-right direction of the first lighting fixture, where (A) shows the case with a lens array and (B) shows the case without a lens array. [Figure 12] It is an exploded perspective view of the above second lighting fixture. [Figure 13] It is an exploded perspective view of the second light source unit of the above second lighting fixture. [Figure 14] It is an exploded perspective view of the lighting device according to the second embodiment of the present invention. [Figure 15] It is a perspective view of the optical unit in the above first lighting fixture as viewed from the front direction. [Figure 16] It is a side view of the above first optical unit. [Figure 17] It is a light distribution characteristic diagram of the above first optical unit, where (A) shows the illuminance distribution of the light reflected by the first reflecting part and (B) shows the illuminance distribution of the light reflected by the second reflecting part. [Figure 18] It is an illuminance distribution diagram of the combined light of the reflected light by the above first reflecting part and the second reflecting part. [Figure 19] It is a lighting device according to the third embodiment of the present invention, and it is a front view of the first lighting fixture when the window member is removed. [Figure 20] It is a cross-sectional view of the above first lighting fixture. [Figure 21] It is a (A) plan view and (B) front view of the optical unit in the above first lighting fixture. [Figure 22] °It is a (A) plan view and (B) side view of the LED substrate constituting the above optical unit. [Figure 23]This is a front view of the optical unit and rotation mechanism described above. [Figure 24] This is a side view of the optical unit and rotation mechanism described above. [Figure 25] (A) is a side view and (B) is a front view of the movable plate portion that constitutes the above-mentioned rotation mechanism. [Figure 26] This is an illuminance distribution diagram showing one of the effects of the first lighting fixture described above. [Figure 27] (A) an oblique view, (A) a side view, and (B) a front view of the first light source module in Modification 1 of the present invention. [Figure 28] This is an enlarged side view of the main part showing the light distribution characteristics of the light emitted through the lens portion of the light source module of the above modified example 1, along the X-axis direction. [Modes for carrying out the invention]

[0021] Embodiments of the present invention will be described below with reference to the drawings.

[0022] <First Embodiment> Figure 1 is an overall view of a lighting device 1 according to one embodiment of the present invention, and Figure 2 is a top view of the lighting device 1. In this embodiment, the X, Y, and Z axes represent three mutually orthogonal axial directions, with the X axis corresponding to the left-right direction (width direction, direction of travel), the Y axis to the front-back direction, and the Z axis to the height direction.

[0023] The lighting device 1 of this embodiment is configured as a low-position lighting fixture installed, for example, on a highway. The lighting device 1 comprises a first lighting fixture 100 and a second lighting fixture 1000. The first lighting fixture 100 and the second lighting fixture 1000 will be described below.

[0024] [First lighting fixture] Figure 3 is a perspective view of the first lighting fixture 100 according to one embodiment of the present invention, Figure 4(A) is a front view thereof, Figure 4(B) is a bottom view thereof, Figure 4(C) is a side view thereof, and Figure 5 is an exploded perspective view thereof. The first lighting fixture 100 comprises a device body 10 and a pair of legs 81, 82 that support the device body 10. The first lighting fixture body 10 has a first casing 110, internal components such as a first optical unit 20, a terminal block 31, and a power supply unit 32, which will be described later, installed inside the first casing 110, and a first window member 120 that covers the inside of the first casing 110.

[0025] Figure 6 is a schematic plan view showing an example of the installation of the lighting device 1 on a road R (road surface R'). In the figure, W1 is a retaining wall, W2 is a median strip, Tz1 is the first lane, and Tz2 is the second lane. As shown in the figure, multiple first lighting fixtures 100 are installed on the retaining wall W1 at predetermined intervals in the direction of vehicle travel, with the first window members 120 facing the median strip W2. The first lighting fixtures 100 emit first light L1 (first light) from the first light source unit 20 through the window members 120 towards the median strip W2 (road surface R') in a direction perpendicular to the lanes Tz1 and Tz2 (Z1 is the emission range of the first light L1). The installation height of the lighting device 1 on the retaining wall W1 is not particularly limited and is, for example, 1.2m. The lighting device 1 may be installed not only on the retaining wall W1 but also on the median strip W2.

[0026] Figure 7 is a cross-sectional view along line AA in Figure 4(A). The overall configuration of the first lighting fixture 100 will be described below with reference to Figure 7.

[0027] (First casing) The first casing 110 has a roughly rectangular parallelepiped shape with a longitudinal direction in one axis (X-axis direction). The first casing 110 has a three-part structure consisting of a main block 111 extending in the X-axis direction and a pair of side blocks 131, 132 attached to both ends of the main block 111 in the X-axis direction. The main block 111 and the pair of side blocks 131, 132 are made of a metallic material such as an aluminum alloy.

[0028] The main block 111 is formed in a roughly U-shaped cross-section, having a longitudinal upper wall portion S1 and a bottom wall portion S2, and a rear wall portion S3, respectively, in the X-axis direction (see Figure 7). The main block 111 is made of a molded body with a uniform cross-section perpendicular to the X-axis direction, and in this embodiment, it is manufactured by an extrusion molding method.

[0029] On the other hand, the first window member (first translucent portion) 120 is made of a light-transmitting material such as tempered glass or reinforced plastic, having a longer side in the X-axis direction. The first window member 120 is formed in a shape similar to the front shape (shape viewed from the X-axis direction) of the first casing 110. The first window member 120 is attached to the front side of the first casing 110 so as to face the rear wall portion S3 in the X-axis direction.

[0030] In this embodiment, the first window member 120 is rotatably attached to the first casing 110. Multiple hinge members 71 supporting the upper long side of the first window member 120 are attached to the upper wall portion S1 of the first casing 110 (main block 111). This allows the interior of the device body 10 to be opened by rotating the first window member 120, thereby ensuring ease of maintenance of internal components such as the first optical unit 20, terminal block 31, and power supply unit 32 installed inside the device body 10.

[0031] Furthermore, a plurality of fasteners 72 are attached to the bottom wall S3 of the first casing 110 (main block 111), which can engage the lower long side of the first window member 120. Each fastener 72 consists of a ring portion attached to the first casing 110 and a hook portion attached to the first window member 120, and the ring portion and the hook portion engage with each other when the first window member 120 closes the first casing 110. This prevents the first window member 120 from rotating unintentionally.

[0032] As shown in Figure 3, the first window member 120 has a window portion W that transmits light (first light) emitted from the first optical unit 20. The window portion W is a rectangle with its length in the X-axis direction and is partially formed in the region facing the first optical unit 20 in the Y-axis direction. The region of the first window member 120 other than the window portion W is covered with a black light-shielding layer Wb formed on the inner surface of the first window member 120. The light-shielding layer Wb is intended to prevent the region of the first casing 110 other than the region corresponding to the first optical unit 20 from being visible from the outside, and can be omitted as needed depending on the size of the first casing 110 or the first optical unit 20.

[0033] As described above, the main block 111 of the first casing 110 is composed of a molded body with a uniform cross-sectional shape in the X-axis direction. The main block 111 has seven guide grooves G1 to G7 that extend parallel to the X-axis direction. Specifically, guide grooves G1, G2 and G3 are formed on the inner surface side of the back wall portion S3, and guide grooves G4 and G5 are formed on the outer surface side of the bottom wall portion S2. Guide groove G6 is formed at the front end of the upper wall portion S1, and guide groove G7 is formed at the front end of the bottom wall portion S2.

[0034] Each guide groove G1 to G7 is formed over the entire width (X-axis direction) of the main block 111. Of these, guide grooves G1 to G5 have a return portion that forms an opening width greater than the groove width, and are formed to engage with the head of a screw member or bolt member (hereinafter also referred to as a fastener) that fits into each guide groove. Guide grooves G6 and G7 form a housing portion for a seal ring 140 interposed between the main block 111 and the first window member 120.

[0035] Guide grooves G1 to G3 are provided at intervals in the height direction (Z-axis direction) of the rear wall S3 of the main block 111. The heads of multiple fasteners F1 (see Figure 5) that fix the upper ends of the first optical unit 20 and the terminal block 31, respectively, engage with the uppermost guide groove G1. The heads of multiple fasteners that fix the power supply unit 32 that supplies power to the first optical unit 20 engage with the central guide groove G2. The head of a fastener that fixes the lower end of the terminal block 31 engages with the lowermost guide groove G3. Nut members N1 (see Figure 7) are screwed onto the shafts of each of the fasteners, thereby fixing the first optical unit 20, the terminal block 31, and the power supply unit 32 to the guide grooves G1 to G3, respectively.

[0036] The power supply unit 32 is positioned between the first optical unit 20 and the terminal block 31. The terminal block 31 electrically connects the power cable, which is inserted into the first casing 110, to the power supply unit 32 via a bush B attached to one of the side blocks 131.

[0037] Guide grooves G4 and G5 are provided at intervals in the front-rear direction (Y-axis direction) of the bottom wall portion S2 of the main block 111. The heads of fasteners F2 (see Figure 5) that fix a pair of legs 81 and 82 for installing the device body 10 on the retaining wall W1 engage with each guide groove G4 and G5. Each fastener F2 fixes the pair of legs 81 and 82 to the guide grooves G4 and G5 by screwing a nut member N2 (see Figure 5) onto its shaft. The pair of legs 81 and 82 are each fixed by two fasteners F2 that are opposite each other in the front-rear direction. The first lighting fixture 100 is installed with its longitudinal direction (X-axis direction) parallel to the installation surface via this pair of legs 81 and 82.

[0038] The main block 111 further has four screw receiving portions H1 to H4 that extend parallel to the X-axis direction. Specifically, the screw receiving portions H1 to H4 have a partially cylindrical shape with their axis in the X-axis direction. A partially cylindrical shape refers to a cylindrical shape in which a part of the circumference is missing.

[0039] The screw receiving portion H1 is formed directly above the guide groove G1 in the rear wall portion S3. The screw receiving portion H2 is formed on the front side of the upper wall portion S1. The screw receiving portion H3 is formed at the boundary between the bottom wall portion S2 and the rear wall portion S3. The screw receiving portion H4 is formed on the front side of the bottom wall portion S2. These screw receiving portions H1 to H4 are formed over the entire width direction (X-axis direction) of the main block 111 and function as screw holes into which multiple screw members P that fix a pair of side blocks 131 and 132 to both ends of the main block 111 in the X-axis direction are screwed.

[0040] A pair of side blocks 131 and 132 form the side walls of the casing 110, facing each other in the X-axis direction. The pair of side blocks 131 and 132 are attached to both ends of the main block 111 in the X-axis direction and each has an opening 13P of a shape corresponding to the end. Each opening 13P of the side blocks 131 and 132 is typically secured to both ends of the main block 111 via a seal ring. The seal rings may each consist of a separate part or may be formed integrally with the seal ring 140.

[0041] Guide grooves G8 and G9 are provided at the front ends of the pair of side blocks 131 and 132, respectively, to accommodate the folded portions at both ends of the seal ring 140 in the X-axis direction (see Figure 3). Guide grooves G8 and G9 are continuously connected to guide grooves G6 and G7 provided on the main block 111. This allows the seal ring 140 to be stably held between the casing 110 and the window member 120.

[0042] The pair of side blocks 131 and 132 have multiple screw insertion holes M (see Figure 3) formed at positions corresponding to the screw receiving portions H1 to H4 of the main block 111. The pair of side blocks 131 and 132 are fixed together by multiple screw members P inserted through each screw insertion hole M.

[0043] The first lighting fixture body 10 further comprises a plurality of plug members T embedded in the screw insertion holes M of the side blocks 131 and 132. The plug members T function as sealing members to prevent moisture such as raindrops from entering the first lighting fixture body 10 through the screw insertion holes M.

[0044] (First optical unit) Next, we will describe the details of the first optical unit 20.

[0045] The first optical unit 20 is an illumination light source emitted from the first illuminator 100. As shown in Figures 5 and 7, the first optical unit 20 has a first light source module 21 and a first reflective member 22, which are installed inside the first casing 110, respectively.

[0046] The first light source module 21 includes a first LED substrate 211 on which a plurality of first light-emitting elements 210 are mounted, a lens array 212 (first lens array) that distributes the light emitted from each of the first light-emitting elements 210, and a first support plate portion 215 that supports the first LED substrate 211 and the lens array 212. Figure 8(A) is a plan view of the first light source module 21 as seen from the light-emitting surface, and Figure 8(B) is a side view thereof.

[0047] The multiple first light-emitting elements 210 are typically semiconductor light-emitting elements such as LEDs (Light Emitting Diodes), and their emitted light color is typically white. In this embodiment, an LED component is used that forms white light by combining a blue LED with its complementary color, a yellow phosphor, but it is not limited to this.

[0048] The first LED substrate 211 is a rectangular circuit board having its longer side in the longitudinal direction (X-axis direction) of the first casing 110, and a plurality of first light-emitting elements 210 are mounted on its surface. In the center of the width direction of the first LED substrate 211, a plurality of female screw members 214 are embedded at predetermined intervals in the longitudinal direction, which are screwed into a plurality of fasteners F3 inserted through the first support plate portion 215. In addition, a connector 213 for connecting to a wiring cable (not shown) extending from the power supply unit 32 is mounted on one end of the first LED substrate 211 in the longitudinal direction.

[0049] In this embodiment, multiple (two in this example) first LED substrates 211 are aligned in the X-axis direction and mounted on the first support plate portion 215, but the embodiment is not limited to this, and the number of first LED substrates 211 may be one. In this case, the longitudinal size of the first light source unit 20 may be approximately the length of the long side of the first LED substrate 211.

[0050] Each first light-emitting element 210 is arranged in a single row on the first LED substrate 211 at predetermined intervals along the long side direction (X-axis direction), but may be arranged in multiple rows. Each first light-emitting element 210 has an optical axis in a direction perpendicular to the normal direction of the first LED substrate 211, that is, perpendicular to the longitudinal direction (X-axis direction) of the first casing 110. The first LED substrate 211 is fixed to the first support plate portion 215 using a plurality of fasteners F3, with the mounting surface of the first light-emitting elements 210 facing downward, that is, toward the first reflective surface 221 of the first reflective member 22.

[0051] The lens array 212 has multiple lens portions 212a that individually cover multiple first light-emitting elements 210. The lens array 212 is fixed onto the first LED substrate 211 using multiple fasteners or adhesives.

[0052] Figure 9 is an enlarged side view of the main part showing the light distribution characteristics of the emitted light passing through the lens portion 212a along the X-axis direction.

[0053] Each lens section 212a includes an incident lens surface 212a1 that houses the first light-emitting element 210, and an exit lens surface 212a2 that increases the light distribution intensity in the oblique direction, which is inclined at a predetermined angle on both sides in the left-right direction (X-axis direction) from the optical axis direction, compared to the light distribution intensity in the optical axis direction of the first light-emitting element 210. In this embodiment, the incident lens surface 212a1 has a concave shape with a substantially semicircular cross-section, and the exit lens surface 212a2 has a convex shape provided on both sides in the left-right direction, straddling the optical axis direction. The shapes of the incident lens surface 212a1 and the exit lens surface 212a2 are not particularly limited and can be arbitrarily designed as long as the above-described light distribution characteristics can be obtained.

[0054] The first support plate portion 215 is made of a molded body of a metal material such as an aluminum alloy having a uniform cross-sectional shape in the X-axis direction, and as shown in Figure 7, it has an inclined surface portion 215a that supports the first LED substrate 211 and a vertical surface portion 215b that is fixed to the rear wall portion S3 of the first casing 110. The inclined surface portion 215a extends from the rear wall portion S3 side toward the first window member 120 at a predetermined angle downward, and the first LED substrate 211 is attached to its lower surface. This prevents the first light source module 21 from being directly visible from the front of the first lighting fixture 100, and reduces glare when a vehicle occupant looks at the first lighting fixture 100.

[0055] The first reflective member 22 supports the first light source module 21 and functions as a reflector equipped with a first reflective surface 221 that reflects light emitted from the first light source module 21 toward the first window member 120. The first reflective member 22 extends in the width direction (X-axis direction) of the first casing 110 and is made of a molded body of a metal material such as an aluminum alloy with a uniform cross-sectional shape in the X-axis direction, and in this embodiment is manufactured by an extrusion molding method.

[0056] The first reflective member 22 has a first reflective surface 221 that reflects light emitted from the first light source module 21 toward the first window member 120 (window portion W). The first reflective surface 221 is formed as a curved surface with a uniform cross-sectional shape perpendicular to the longitudinal direction (X-axis direction) of the casing 110, and is convex toward the rear wall portion S3.

[0057] The first reflective surface 221 is subjected to surface treatments that enhance light reflectivity, such as deposition of a metal film, mirror finishing, or adhesion of metal foil or white PET (polyethylene terephthalate). The other surfaces of the first reflective member 22, other than the first reflective surface 221, are colored black (for example, by anodizing) to prevent the reflection of stray light inside the first casing 110.

[0058] The first reflective member 22 further includes a fixing plate portion 222, a reference surface portion 223, and a leg plate portion 224.

[0059] The fixing plate portion 222 is fixed to the rear wall portion S3 of the first casing 110 together with the first support plate portion 215 of the first light source module 21. The fixing plate portion 222 is fixed together with the first support plate portion 215 by fasteners F1, sandwiched between the vertical surface portion 215b of the first support plate portion 215 and the guide groove G1 of the rear wall portion S3.

[0060] The reference surface portion 223 positions the first light source module 21 by contacting the first support plate portion 215 of the first light source module 21, thereby ensuring the desired inclination of the first LED substrate 211 and its relative distance from the first reflective surface portion 221.

[0061] The leg plate portion 224 is a flat plate portion provided so as to protrude from the rear side of the first reflective member 22 toward the rear wall portion S3 of the first casing 110. The tip of the leg plate portion 224 abuts against the inner surface of the rear wall portion S3 (see Figure 7), thereby maintaining the fixed position of the first reflective member 22 (first optical unit 20) within the first casing 110.

[0062] Figure 10 is a ray trace diagram of the emitted light (illumination light (first light) L1) in the first optical unit 20. As shown in the figure, the emitted light (first light L1) from the first light source module 21 is reflected by the first reflecting member 22 toward the front of the first lighting fixture 100, and is transmitted through the first window member 120 to the outside.

[0063] In this embodiment, since the first reflective surface 221 of the first reflective member 22 is formed in a curved shape, almost all of the light emitted from the first light source module 21 can be reflected in the forward direction, thereby increasing the efficiency of light utilization. Furthermore, because the first reflective surface 221 is formed in a curved shape, the light emitted from the first light source module 21 (first light) can be irradiated onto a predetermined illumination range over a predetermined angular range in the vertical direction (height direction) of the first lighting fixture 100.

[0064] Furthermore, in this embodiment, the first light source module 21 is equipped with a lens array 212 that emits light from each first light-emitting element 210 obliquely in a light distribution intensity higher than that in the optical axis direction. As a result, the illuminance of the first lighting fixture 100 in the left-right direction (width direction) along the longitudinal direction of the first casing 110 is increased. This makes it possible to increase the installation spacing of the first lighting fixtures 100.

[0065] Figure 11(A) is an illuminance distribution diagram in the left-right direction of the first lighting fixture 100. For comparison, Figure 11(B) shows the illuminance distribution diagram when the lens array 212 is omitted from the first lighting fixture 100. As shown in Figure 11(A), it can be seen that according to this embodiment, the light illumination range in the left-right direction can be greatly expanded compared to the case without the lens array (Figure 11(B)). This makes it possible to increase the spacing D (see Figure 6) of the first lighting fixtures 100 installed on the road along the direction of vehicle travel, and to reduce the number of lighting fixtures that need to be installed.

[0066] Furthermore, the installation of the lens array 212 can cause the light emitted from both ends of the first lighting fixture 100 in the width direction to become yellowish due to the color separation effect of the lens array 212, which can cause unevenness in the color of the illumination on the road surface (especially the road surface near the first lighting fixture 100). To solve this, in this embodiment, as shown in Figure 7, a recessed portion 221a is locally provided in a part of the area of ​​the first reflective surface 221 on the fixing plate portion 222 side. The recessed portion 221a is formed by a partially spherical convex surface extending in the left-right direction (X-axis direction) of the first casing 110.

[0067] The uneven surface 221a is positioned where light emitted from both ends of the first light source module 21 reaches, and as shown in Figure 10, it reflects the light incident on the uneven surface 221a upwards in the forward direction. As a result, the emitted light (yellowish light) that has been color-separated at both ends of the lens array 212 is reflected forward (in the forward direction), thereby suppressing the occurrence of color unevenness on the road surface near the first lighting fixture 100.

[0068] [Second lighting fixture] Figure 12 is an exploded perspective view of the second lighting fixture 1000, and Figure 13 is an exploded perspective view of the second light source unit 2000 of the second lighting fixture 1000. The second lighting fixture 1000 includes a second casing 1100 which is attached to the first casing 110 in any orientation via a support frame 1500, a second optical unit 2000 which will be described later and installed inside the second casing 1100, a second window member 1200 which covers the inside of the second casing 1100, a frame portion 1300 which attaches the second window member 1200 to the second casing 1100, and a support frame 1500 which connects the first casing 110 and the second casing 1100.

[0069] (Second casing) The second casing 1100 has an opening and is attached to the first casing 110 via a support frame 1500, and has a roughly rectangular parallelepiped shape with its length in the Z-axis direction. The second casing 1100 is made of a metallic material such as an aluminum alloy. The second casing 1100 has an outer peripheral edge portion 1100A that forms the opening and a bottom wall portion S' at a position opposite the opening, and is formed in a roughly U-shape, with the light source unit 2000, which will be described later, housed in its internal space. In this embodiment, the second casing 1100 is manufactured by a casting method (aluminum casting alloy or aluminum die-cast alloy).

[0070] Furthermore, a screw receiving portion (not shown) for attaching the light source unit 2000, which will be described later, is formed in the bottom wall portion S' of the second casing 1100. This allows the light source unit 2000 to be attached to the second casing 1100.

[0071] The second window member (second transparent section) 1200 is made of a light-transmitting material such as tempered glass or reinforced plastic, having a longer side in the Z-axis direction. The second window member 1200 is formed in a shape similar to the front shape (shape viewed from the opening side) of the second casing 1100. The second window member 1200 is attached to the outer peripheral edge 1100A of the second casing 1100 so as to face the outer peripheral edge 1100A.

[0072] In this embodiment, the second window member 1200 is attached to the second casing 1100 by screws N1'. Four receiving portions P3' for fasteners N1' attached to the four corners of the first window member 1200 are formed on the outer peripheral edge 1100A of the second casing 1100. The second window member 1200 also has holes P2' formed at its four corners through which the fasteners N1' are inserted.

[0073] The second window member 1200 transmits the light (second light) L2 emitted from the second optical unit 2000.

[0074] The second casing 1100 has a rectangular guide groove G1' formed along its outer peripheral edge 1100A on the inner side of the outer peripheral edge 1100A. A packing 1400, which has the same shape as the guide groove G1', is fitted into this guide groove G1'. The packing 1400 is fixed to the first casing 1100 by the second window member 1200 described above so as not to come off. This prevents dust and water droplets from entering from the outside.

[0075] Furthermore, as shown in Figure 12, the frame portion 1300 is formed in a rectangular shape (frame shape) along the outer peripheral edge 1100A of the first casing 1100. The frame portion 1300 is formed so as to face the outer peripheral edge of the second window member 1200, as shown in Figure 12. The frame portion 1300 has holes P1' for attaching fasteners N1', and the holes P1', P2', and P3' are formed to be in a straight line. The frame portion 1300 has the function of fixing to the second casing 1100 by covering the outer peripheral edge of the second window member 1200.

[0076] (Second optical unit) Next, we will explain the details of the second optical unit 2000.

[0077] The second optical unit 2000 is an illumination light source emitted from the second illuminator 1000. The second optical unit 2000 has a second light source module 2100 and a second reflective member 2200, which are installed inside the second casing 1100, as shown in Figures 12 and 13.

[0078] The second light source module 2100 includes a second LED substrate 2100A on which a plurality of second light-emitting elements 2101A are mounted, a reflector array 2102A (second lens array) that distributes the light emitted from each second light-emitting element 2101A, and a second support plate portion 2100B that supports the second LED substrate 2100A and the second reflector array 2102A.

[0079] The multiple second light-emitting elements 2101A are typically semiconductor light-emitting elements such as LEDs (Light Emitting Diodes), and their emitted light color is typically white. In this embodiment, an LED component is used that forms white light by combining a blue LED with its complementary color, a yellow phosphor, but of course, it is not limited to this.

[0080] The second LED board 2100A is a rectangular circuit board having its longer side in the direction of the shorter side of the second casing 1100, and a plurality of second light-emitting elements 2101A are mounted on its surface. In the center of the width direction of the second LED board 2100A, holes P5' through which a plurality of fasteners N2' are inserted are formed at both ends in the direction of the longer side. The second LED board 2100A is also equipped with a connector (not shown) for connecting to a wiring cable (not shown) extending from a power supply unit 32 located inside the first lighting fixture 100.

[0081] In this embodiment, multiple (three in this example) second LED substrates 2100A are aligned in the Z-axis direction and each is mounted on the second support plate portion 2100B. However, the embodiment is not limited to this, and the number of second LED substrates 2100A may be one, two, or four or more.

[0082] Each second light-emitting element 2101A is arranged in a single row on the second LED substrate 2100A at predetermined intervals along the longer side, but may be arranged in multiple rows.

[0083] The second reflector array 2102A covers each of the multiple second light-emitting elements 2101A individually. The second reflector array 2102A is fixed onto the second LED substrate 2100A using multiple fasteners or adhesives.

[0084] The second support plate portion 2100B is made of a molded body of a metal material such as an aluminum alloy, which has a uniform cross-sectional shape in the X-axis direction.

[0085] The second reflective member 2200 functions as a reflector equipped with a second reflective surface 2200A that reflects the light (second light) L2 emitted from the second light source module 2100A toward the second window member 1200. The second reflective member 2200A extends in the width direction of the second casing 1100 and is composed of a molded body of a resin material with a uniform cross-sectional shape, and in this embodiment is manufactured by injection molding. Of course, it is not limited to resin material and may be an aluminum alloy, in which case it is manufactured by casting (aluminum die casting).

[0086] The second reflective member 2200 has a second reflective surface 2200A that reflects the light L2 emitted from the second light source module 2100 toward the second window member 1200. The second reflective surface 2200A is formed as a curved surface with a concave shape in a direction perpendicular to the second LED substrate 2100A.

[0087] The second reflective surface 2200A is subjected to surface treatments that enhance light reflectivity, such as deposition of a metal film, mirror finishing, or adhesion of metal foil or white PET (polyethylene terephthalate).

[0088] In this embodiment, since the second reflective surface 2200A of the second reflective member 2200 is formed in a curved shape, almost all of the light emitted from the second light source module 2100 can be reflected in the forward direction, thereby increasing the efficiency of light utilization. Furthermore, because the second reflective surface 2200A is formed in a curved shape, the light emitted from the second light source module 2100 can be irradiated onto a predetermined illumination range over a predetermined angular range in the vertical direction (height direction) of the second lighting fixture 1000.

[0089] (Support frame) The support frame 1500 is attached to the second casing 1100 and the first casing 110, and is configured to allow the second casing 1100 to be attached to the first casing 110 in any orientation.

[0090] The support frame 1500 comprises a first support frame 1500A and a second support frame 1500B. The first support frame 1500A is a frame attached to the back wall portion S3 of the first casing 110 by fasteners or the like. In this embodiment, the first support frame 1500A is formed to extend in the X-axis direction (forward in the direction of road travel). The first support frame 1500A has a first mounting portion 1501A on one end in the X-axis direction to which the second support frame 1500B is attached. In this embodiment, the first mounting portion 1501A has a screw hole and is fastened to the second support frame 1501B by screws, but is not limited to this and may be welded.

[0091] Furthermore, the support frame 1500 (the first support frame 1500A) is configured to be attachable (movable) to any location on the first casing 110. In other words, in this embodiment, the support frame 1500 is attached to the rear wall S3 of the first casing 110, but it may be removed and attached to the upper wall S1 or the like.

[0092] The second support frame 1500B is attached to the first support frame 1500A and supports the second casing 1100. The second support frame 1500B is formed in a substantially U-shape. The second support frame 1500B has a second mounting portion 1501B that faces the first mounting portion 1501A described above and is attached to the first mounting portion 1501A, and a plurality of support portions 1502B that extend forward in the direction of travel of the road from both ends of the second mounting portion 1501B and support the second casing 1100.

[0093] In other words, the second support frame 1500B is formed such that the second casing 1100 (second window member 1200) faces forward in the direction of travel of the road R.

[0094] The second support frame 1500B is fastened to both sides of the second casing 1100 by a plurality of fasteners 1503B. Furthermore, the second support frame 1500B adjusts its elevation and depression angle relative to the road surface R' by a plurality of angle adjustment parts (materials) 1504. The adjustment method is as follows: First, loosen the bolts on both sides of the fasteners 1503B and the bolts of the angle adjustment parts 1504. Next, since the holes into which the angle adjustment parts 1504 are inserted are elongated holes, adjust them to any position within the range of the elongated holes (for example, 0 to -15° (downward (towards the road surface R'))) and then tighten the respective bolts to adjust the angle. In this embodiment, the elongated holes are downward, but of course, they are not limited to this, and they may be adjustable in the vertical direction, and the angle range is not limited to 15°.

[0095] In this embodiment, the orientation of the second lighting fixture 1000 (second casing 1100) around the Z-axis (horizontal to the road) is predetermined, but of course, it is not limited to this, and the orientation of the second lighting fixture 1000 in the horizontal direction may be adjustable.

[0096] In this embodiment, the second lighting fixture 1000 is attached to the first lighting fixture 100 via a support frame 1500. This means that adjustments such as optical axis alignment can be performed independently on each fixture, reducing the man-hours required for adjustment. Furthermore, by separating the first lighting fixture 100 and the second lighting fixture 1000, maintenance and replacement can be performed on each fixture, improving maintainability.

[0097] As shown in Figure 6, the second lighting fixture 1000 is installed with the second window member 1200 facing forward in the direction of travel on the road. The second lighting fixture 1000 emits the second emitted light L2 from the second light source unit 2000 through the second window member 1200 in the direction of travel on the road. As shown in Figure 6, the second emission range Z2 by the second lighting fixture 1000 may be different from the first emission range Z1 by the first lighting fixture 100. This makes it possible to emit light over a wide area (ensuring brightness on the road), so the installation interval of the lighting devices 1 can be widened and the number of installed devices can be reduced (cost reduction). In this embodiment, the first emission range Z1 and the second emission range Z2 illuminate areas that do not overlap, but of course, this is not limited to this, and they may overlap in some areas, or the second illumination range Z2 may be included within the first emission range Z1. In other words, by overlapping part or all of the emission ranges of each device, the area can be made brighter.

[0098] Furthermore, since the second lighting fixture 1000 can be adjusted in angle to the road surface, it can illuminate not only the road surface but also the space above the road and the walls. This makes it possible to brighten the walls and information spaces inside the tunnel, thereby providing a sense of security to vehicle occupants.

[0099] Furthermore, in this embodiment, the second lighting fixture 1000 emitted the second light L2 toward the front in the direction of travel on the road, but of course, it is not limited to this, and the second lighting fixture 1000 may be attached to the first lighting fixture 100 so as to emit light toward the rear in the direction of travel on the road (counterbeam). In this case, by making the second light L2 red, it is possible to draw the attention of vehicle occupants.

[0100] Furthermore, in this embodiment, the second light source units 2000 of the second lighting fixture 1000 all emitted light in the same direction, but of course, this is not limited to this. For example, the second light source units 2000 may emit multiple second lights with different emission ranges from each other. That is, some of the second lights emitted from the multiple second light source modules 2100 are emitted toward the road surface ahead in the direction of travel, and other parts of the second lights emitted from the multiple second light source modules 2100 are emitted upward above the road surface ahead in the direction of travel.

[0101] For example, as shown in Figure 13, the upper two rows of the second light source modules 2100 may be directed upwards above the road surface in the direction of travel, while the lower row of the second light source modules 2100 may be directed toward the road surface in the direction of travel. By changing the mounting direction of the second light source modules 2100 in this way, it is possible to illuminate not only the road surface but also the surrounding space and walls without adding any new optical systems. Furthermore, if there is a puddle on the road surface and illuminating the road surface would cause glare and make it difficult to see, the system may be controlled not to illuminate the road surface. This allows for illumination of the space and walls above the road surface while avoiding illumination of the glare-prone road surface, thereby providing a sense of security to vehicle occupants.

[0102] As mentioned above, the second light source module 2100 may be divided according to its emission range, but it is not limited to this. For example, the second light emitted from one second light source module 2100 may have some light directed toward the road surface and other light directed toward the space above or the wall surface.

[0103] In other words, the light may be separated by the second reflective surface 2200A into light directed toward the road surface and light directed toward the space above or the wall surface.

[0104] Alternatively, letters may be formed on the road surface or wall surface by a second light source L2 emitted from the second light source module. This can be used to give warnings or other information to vehicle occupants.

[0105] Furthermore, in this embodiment, the second lighting fixture 1000 is attached to the side of the first lighting fixture 100 (the side facing the direction of travel on the road). This makes it possible to reduce the overall height of the lighting device 1 in the Z-axis direction (suppressing the size of the device) and allows it to be installed in various locations.

[0106] <Second Embodiment> In this type of low-position lighting device, the optimal light distribution differs depending on the shoulder width (or roadside width) and lane width. Therefore, there is a problem in that it is necessary to prepare multiple types of lighting devices with different light distributions to accommodate the shoulder width, etc. In this embodiment, a lighting device that can be applied to roads with different shoulder widths and lane widths will be described.

[0107] Figure 14 is an exploded perspective view of the first lighting fixture 200 according to another embodiment of the present invention. Hereinafter, the description of parts that are similar to the configuration and operation of the first embodiment will be omitted or simplified, and the description will focus on the parts that differ from the first embodiment.

[0108] The lighting device 200 of this embodiment differs from the first embodiment in the configuration of the optical unit. The optical unit 220 of this embodiment has a first reflective member 22 which includes a first reflective portion 22A and a second reflective portion 22B.

[0109] Figure 15 is a perspective view of the optical unit 220 as seen from the front, and Figure 16 is a side view of the optical unit 220 as seen from the X-axis direction.

[0110] The first reflective section 22A and the second reflective section 22B are arranged adjacent to each other in the longitudinal direction (X-axis direction) of the first casing 110. Although the first reflective section 22A and the second reflective section 22B have similar configurations, the light reflection characteristics (light distribution characteristics) of the reflective surfaces 221A and 221B are different from each other.

[0111] In this embodiment, the first reflective portion 22A is configured as a reflective member for narrow shoulders (or road shoulder strips; the same applies hereinafter) where the width of the shoulder is relatively narrow (for example, 0.5 m). On the other hand, the second reflective portion 22B is configured as a reflective member for wide shoulders (for example, 2 m) where the width of the shoulder is relatively wide.

[0112] More specifically, in this embodiment, as shown in Figure 16, the curvature of both reflective surfaces 221A and 221B is designed such that the angle of incidence of the light emitted from the light source module 21 (angle of incidence with reference to the normal direction of the reflective surfaces 221A and 221B) is larger than that of the reflective surface 221B of the second reflective member 22B.

[0113] As a result, the first reflector 22A reflects the light emitted from the first light source module 21 toward the first window member 120 at a larger reflection angle than the second reflector 22B, while the second reflector 22B reflects the light emitted from the first light source module 21 toward the first window member 120 at a smaller reflection angle than the first reflector 22A. Consequently, the light reflected by the second reflector 22B illuminates a more distant area than the light reflected by the first reflector 22A. Thus, the first lighting fixture 200 of this embodiment is configured to emit composite light from the light reflected by the first reflector 22A and the second reflector, which have different reflection characteristics.

[0114] The first light source module 21 is divided into one light source module 21A and the other light source module 22B, corresponding to the first reflector 22A and the second reflector 22B. Each light source module 21A and 21B has a similar configuration and is positioned adjacent to each other in the width direction (X-axis direction) of the casing 110 via the reference surface portion 223 of each reflector 22A and 22B (see Figure 16). Each reference surface portion 223 is formed to lie on the same plane, and therefore each light source module 21A and 21B is also arranged on the same plane.

[0115] In this embodiment as well, each light source module 21A, 21B is equipped with a lens array 212, so, similar to the first embodiment, the illuminance of the first lighting fixture 200 in the left-right direction (width direction) along the longitudinal direction of the first casing 110 is increased.

[0116] Figure 17(A) shows an example of the illuminance distribution of light reflected by the first reflector 22A, and Figure 17(B) shows an example of the illuminance distribution of light reflected by the second reflector 22B. Figure 18 is an illuminance distribution diagram of the combined light of the reflected light from the first reflector 22A and the second reflector 22B.

[0117] As described above, according to this embodiment, a single lighting device 200 can be applied to different uses for narrow and wide road shoulders. Furthermore, by equipping it with reflectors 22A and 22B with different light distributions, it has the advantage of making the illumination of the first lane Tz1 and the second lane Tz2 uniform. Moreover, according to this embodiment, by applying it to the illumination of curved areas of a road, it has the advantage of being able to emit illumination light over a wider area, for example, on the exit side of the curve.

[0118] <Third Embodiment> In the embodiments described above, the optical unit is not configured to be rotatable, but of course, it is not limited to this, and the optical unit may be configured to be rotatable. Figure 19 is a front view of the first lighting fixture 300 according to the third embodiment of the present invention, with the first window member 120 removed, and Figure 20 is a cross-sectional view of the first lighting fixture 300. Figure 21 is a (A) plan view and (B) front view of the first optical unit 20A in the first lighting fixture 300, and Figure 22 is a (A) plan view and (B) side view of the LED substrate constituting the first optical unit 20A.Hereafter, the description of parts that are similar to the configuration and operation of the second embodiment will be omitted or simplified, and the description will focus on parts that differ from the second embodiment.

[0119] The first lighting fixture 300 of this embodiment further has a rotating mechanism 90 that supports the first optical unit 20A so that it can rotate around the X axis.

[0120] Furthermore, the guide grooves G1 to G3 provided in the first casing 110 are spaced apart in the height direction (Z-axis direction) of the rear wall portion S3 of the main block 111. The heads of multiple fasteners F1 (see Figure 20) that fix the upper end of the rotating mechanism 90 and the upper end of the terminal block 31 engage with the uppermost guide groove G1. The heads of multiple fasteners that fix the lower end of the rotating mechanism 90 and the power supply unit 32 that supplies power to the first optical unit 20 engage with the central guide groove G2.

[0121] The first optical unit 20A is a light source unit for illumination light emitted from the first illuminator 300. As shown in Figure 20, the first optical unit 20A is installed inside the first casing 110 and has a base member 21' (reflective member) and a plurality of LED substrates 22'.

[0122] The base member 21' supports an LED substrate 22' (light source module) that supports multiple light-emitting elements, and also functions as a reflector that reflects the light emitted from the LED substrate 22' toward the first window member 120. The base member 21' extends in the width direction (X-axis direction) of the casing 110 and is made of a molded body of a metal material such as an aluminum alloy with a uniform cross-sectional shape in the X-axis direction, and in this embodiment is manufactured by an extrusion molding method.

[0123] As shown in Figure 20, the base member 21' has a support plate portion 211' and a reflector portion 212', which are formed integrally and continuously in the X-axis direction.

[0124] The support plate portion 211' has a support surface 211a' on which the LED substrate 22' is mounted. The reflector portion 212' (reflective member) is integrally formed with the support plate portion 211' and reflects the light emitted from the LED substrate 22' toward the first window member 120.

[0125] Figure 21(A) is a plan view of the first optical unit 20A as seen from the Z-axis direction, and Figure 21(B) is a front view of the first optical unit 20A as seen from the Y-axis direction. Figure 22(A) is a plan view showing the light-emitting element mounting surface of the LED substrate 22', and Figure 22(B) is a side view of the LED substrate 22'.

[0126] The LED substrate 22' corresponds to the first light source module in the present invention and has a circuit board 221' having a longer side in the X-axis direction and a plurality of light-emitting elements 222' mounted on the circuit board 221'. The circuit board 221' is rectangular in shape with its longer side in the X-axis direction, and a plurality of female screw members 224' are embedded in its central part at predetermined intervals in the X-axis direction, to be screwed into a plurality of fasteners V inserted through the support plate portion 211' of the base member 21'. In addition, a connector 223' for connecting to a wiring cable (not shown) extending from a power supply unit 32' is mounted on one end of the circuit board 221' in the longitudinal direction.

[0127] In this embodiment, one LED substrate 22' is mounted on the support surface 211a' aligned in the X-axis direction (see Figure 20). However, the first optical unit 20A may comprise multiple LED substrates 22'. In this case, the length of the first optical unit 20A in the width direction (X-axis direction) may be longer than the length of the first optical unit 20A shown in Figure 19 (approximately twice the length).

[0128] The multiple light-emitting elements 222' are typically semiconductor light-emitting elements such as LEDs (Light Emitting Diodes), and their emitted light color is typically white. The multiple light-emitting elements 222' are arranged in a single row at predetermined intervals along the long side direction (X-axis direction) on the circuit board 221', but they may be arranged in multiple rows. The multiple light-emitting elements 222' have optical axes in a direction perpendicular to the X-axis direction. The LED substrate 22' is fixed to the support surface 211a' of the support plate portion 211' via multiple fasteners, with the mounting surface of the light-emitting elements 222' facing the reflector portion 212'.

[0129] The support plate portion 211' of the base member 21' has a first long side portion L1 facing the back wall portion S3 of the first casing 110 and a second long side portion L2 facing the first window member 120 on the opposite side (see Figure 21(A)). The LED substrate 22' has a plurality of light-emitting elements 222' arranged biasedly along one long side of the circuit board 221' (see Figure 22(A)), and is placed on the support surface 211a' of the support plate portion 211' such that the long side on one side faces the first long side L1 of the support plate portion 211'.

[0130] Furthermore, the support plate portion 211' is inclined downward at a predetermined angle from the first long side portion L1 to the second long side portion L2, and the support surface 211a' that supports the LED substrate 22' is set on the lower side of the support plate portion 211'. This prevents the light-emitting element 222' from being directly visible from the front of the first lighting fixture 300, and reduces glare when a vehicle occupant looks at the first lighting fixture 300.

[0131] The reflector portion 212' of the base member 21' reflects the light emitted from the light-emitting element 222' toward the first window member 120 in the Y-axis direction. In this embodiment, the reflector portion 212' is connected to the first long side portion L1 of the support plate portion 211' and has a curved surface 212a facing the support surface 211a' (see Figure 20). By having the light-reflecting surface of the reflector portion 212' exhibit a curved (curved) shape that is convex toward the back wall portion S3, the light emitted from the light-emitting element 222' can be efficiently reflected toward the front. Since the LED substrate 22' is mounted on the lower side of the support plate portion 211', the reflector portion 212' is positioned below the support plate portion 211'.

[0132] (Rotation mechanism) Next, the details of the rotation mechanism 90 will be explained. Here, the rotation mechanism 90 applied to the optical unit 20A shown in Figure 19 will be used as an example. The rotation mechanism 90 described below can also be applied to the optical unit 20 shown in the first embodiment.

[0133] Figure 23 is a front view of the optical unit 20A and the rotation mechanism 90 as seen from the Y-axis direction, and Figure 24 is a side view of the same as seen from the X-axis direction.

[0134] The rotation mechanism 90 includes two rotation mechanism sections 90A and 90B that support each longitudinal end of the optical unit 20A. The rotation mechanism sections 90A and 90B have similar configurations but are configured to be symmetrical with respect to the YZ plane. Hereinafter, the rotation mechanism section 90B that supports the left end of the optical unit 20A when viewed from the front (Figure 19) will be used as a representative example for explanation.

[0135] The rotating mechanism 90B includes a fixed plate portion 91, a movable plate portion 92, a fastening member 93, and a pivot shaft P1. The fixed plate portion 91 is fixed to the back wall portion S2 of the first casing 110 using a fastener F1 and a nut member N1. The pivot shaft P1 is a screw member that penetrates the fixed plate portion 91 and has a shaft portion parallel to the X-axis direction. The movable plate portion 92 is attached to the first optical unit 20A and is configured to allow the first optical unit 20A (base member 21') to rotate around the pivot shaft P1. The fastening member 93 is attached to the fixed plate portion 91 and is a screw member that can fasten the movable plate portion 92 to the fixed plate portion 91.

[0136] The fixed plate portion 91 has a first plate portion 911 parallel to the XZ plane and a second plate portion 912 parallel to the YZ plane. The first plate portion 911 has two holes through which the shaft portion of the fastener F1 passes, and is fixed to the back wall portion S3 (guide grooves G1, G2) via the two fasteners F1 passing through these holes (see Figure 24). The second plate portion 912 has a hole through which the pivot shaft P1 passes, and rotatably supports the movable plate portion 92 via this pivot shaft P1. The second plate portion 912 further has an elongated hole portion 91a through which the shaft portion of the fastening member 93 passes. The elongated hole portion 91a is formed in a partial arc shape with a radius equal to the distance between the pivot shaft P1 and the shaft portion of the fastening member 93. In this embodiment, the arc length of the elongated hole 91a is set so that the first optical unit 20A can be rotated around the pivot axis P1 over a predetermined angular range (for example, 20 degrees).

[0137] The movable plate portion 92 has a first arm portion 921 and a second arm portion 922 that are parallel to the YZ plane, and a connecting portion 923 that connects the first arm portion 921 and the second arm portion 922. Figure 25(A) is a side view of the movable plate portion 92, and Figure 25(B) is a front view of the movable plate portion 92.

[0138] The first arm portion 921 has two holes 921a through which the shafts of two fasteners P2 each pass, and is fixed to the end of the optical unit 20 via the two fasteners P2 passing through these holes 921a. In this embodiment, it is screwed into two partially cylindrical screw receiving portions 214' (see Figure 20) formed parallel to the X-axis direction on the upper surface of the support plate portion 211' of the base member 21.

[0139] The second arm portion 922 has a screw hole portion 922a through which the pivot axis P1 passes, and a screw hole portion 922b through which the shaft portion of the fastening member 93 passes. The screw holes 922A and 922B are holes equipped with nuts.

[0140] The connecting portion 923 is, for example, a plate portion parallel to the XY plane, and is positioned opposite the first arm portion 921 and the second arm portion 922 in the X-axis direction with a predetermined gap between them. This makes it possible to overlap at least a portion of the first arm portion 921 and the second arm portion 922, thereby increasing the degree of freedom in the position where the screw hole portion 922a is provided, and allowing the rotation radius of the LED substrate around the rotation axis P1 to be set arbitrarily.

[0141] The fastening member 93 is screwed into the screw hole 922b of the movable plate portion 92 via the elongated hole 91a of the fixed plate portion 91. When the fastening member 93 is tightened into the screw hole 922b, the second plate portion 922 of the fixed plate portion 91 is clamped between the head of the fastening member 93 and the second arm portion 922 of the movable plate portion 92, preventing the rotation of the movable plate portion 92. On the other hand, when the fastening action of the fastening member 93 is released, the movable plate portion 92 becomes rotatable to any angular position within the range formed by the elongated hole 91a relative to the fixed plate portion 91.

[0142] The other side of the rotating mechanism 90B is also configured as described above. This allows the optical unit 20A to rotate around rotation P1 inside the casing 110. In this embodiment, since the LED substrate 22' and the reflector part 212' are commonly provided on the base member 21', the rotating mechanism 90 causes the LED substrate 22' and the reflector part 212' to rotate integrally.

[0143] As described above, according to this embodiment, since the optical unit 20A is configured to be rotatable, the irradiation range of the illumination light L can be arbitrarily adjusted by changing the rotation angle of the optical unit 20A.

[0144] For example, conventionally, in this type of low-position lighting device, the optimal light distribution differs depending on the shoulder width (or roadside width) and lane width, so it was necessary to prepare multiple types of lighting devices with different light distributions to accommodate the shoulder width, etc. In contrast, according to this embodiment, since the reflector 212' is configured to be rotatable, the present invention can be applied to a lighting device 300 that combines two functions: one for narrow road shoulders and one for wide road shoulders.

[0145] Furthermore, for the second light L' that is projected along the direction of travel of the road R (X-axis direction), it was necessary to prepare multiple types of lighting devices with different projection angles for the second light L' depending on the surrounding environment of the road R (such as whether it is inside a tunnel). In contrast, according to this embodiment, since the reflector 212' is configured to be rotatable, a single lighting device 300 can be adapted to various installation environments.

[0146] Furthermore, by arbitrarily setting the rotation angle range of the optical unit 20A, it can be used as a light fixture to illuminate a distant area more than 10 meters away, or as a light fixture to illuminate a nearby area a few meters away. For example, Figure 26(A) shows the illuminance distribution of the illumination light when the reflector 213' is rotated to the maximum angular position, and Figure 26(B) shows the illuminance distribution when the reflector 213' is rotated to the minimum angular position (a position of -20 degrees from the maximum angular position).

[0147] Furthermore, according to this embodiment, since the support plate portion 211' and the reflector portion 212' of the base member 21' are integrally formed, stable relative positioning between optical elements such as the light-emitting element 222' (LED substrate 22') and the reflector portion 212' mounted on the support plate portion 211' becomes possible compared to the case where these optical elements are fixed separately to the casing 110. This suppresses the occurrence of variations in relative position due to individual differences in each optical element and assembly tolerances, and eliminates the need for fine adjustment of the position between each optical element.

[0148] Furthermore, according to this embodiment, the LED substrate 22' and the reflector section 212' can be integrated into a single optical unit 20A, thus simplifying installation into the casing 110. This further improves assembly efficiency, leading to improvements in productivity and operating costs.

[0149] Furthermore, since multiple fasteners F1 that secure the optical unit 20A are engaged with guide grooves G1 formed in the rear wall S3 of the casing 110, the position of the optical unit 20A relative to the casing 110 can be arbitrarily adjusted in the uniaxial direction by sliding the fasteners F1 along the guide grooves G1. Similarly, the terminal block 31 and the power supply unit 32 can also be adjusted to any position along the guide grooves G1 to G3.

[0150] Although embodiments of the present invention have been described above, it goes without saying that the present invention is not limited to the embodiments described above and can be modified in various ways.

[0151] For example, in the above embodiment, the lighting device 300 was configured as a low-position lighting device for roadways such as expressways, but the present invention is not limited to this and can also be applied as a lighting device for advertisements, exhibits, etc.

[0152] Furthermore, in the above embodiments, an example configuration was described in which the LED substrate 22' (light source module) and the reflector part 213' are rotated integrally as the rotation mechanism 90. However, the invention is not limited to this, and either the LED substrate 22' (light source module) or the reflector part 213' may be configured to be rotatable. This also makes it possible to make the light distribution of the illumination light reflected by the reflector part 213' different.

[0153] Furthermore, the number of first optical units 20 (20A) is not limited to one, but may be multiple. For example, by arranging two first optical units 20A with different rotation angles in the longitudinal direction (X-axis direction) or height direction (Z-axis direction) of the first casing 110, it is possible to irradiate with composite light from the illumination light of two optical units with different light distribution characteristics.

[0154] Furthermore, in the above embodiments, an LED substrate was used as the light source module, equipped with multiple light-emitting elements 222'. However, the invention is not limited to this, and for example, a lens array having a lens portion that distributes the light emitted from each light-emitting element 222' in a predetermined direction may be used. In this case, a lens array can be adopted that emits the light from each light-emitting element 222 in an oblique direction (the width direction of the casing 110) with a light distribution intensity higher than that of the optical axis direction. This makes it possible to increase the installation spacing of lighting devices installed on roads.

[0155] <Example 1> Next, a modification 1 of the present invention will be described. In this embodiment, the lens portion was provided approximately symmetrically, but of course, it is not limited to this, and the light distribution method may be a pro-beam light distribution in which light is emitted in the direction of propagation (positive direction side of the X axis). Figure 27 is an (A) perspective view, (A) side view, and (B) front view of the light source module 21C in modification 1 of the present invention, and Figure 28 is an enlarged side view of the main part showing the light distribution characteristics along the X axis direction of the emitted light transmitted through the lens portion 212a' in the first light source module 21C of modification 1 described above.

[0156] The first light source module 21C has an LED substrate 211 on which a plurality of light-emitting elements 210 are mounted, and a lens portion 212a' that distributes the light emitted from each light-emitting element 210.

[0157] Each lens section 212a' includes an incident lens surface 212a'1 that houses the light-emitting element 210, and an exit lens surface 212a'2 that increases the light distribution intensity in an oblique direction, which is tilted at a predetermined angle from the optical axis direction (positive X-axis direction) compared to the light distribution intensity in the optical axis direction of the light-emitting element 210. In this embodiment, the incident lens surface 212a'1 has a concave shape with a substantially semicircular cross-section, and the exit lens surface 212a'2 has a convex shape provided on the side of the optical axis direction mentioned above. The shapes of the incident lens surface 212a'1 and the exit lens surface 212a'2 are not particularly limited and can be arbitrarily designed as long as the above-described ProBeam light distribution characteristics can be obtained.

[0158] As shown in Figures 27 and 28, the exit-side lens surface 212a'2 has an asymmetrically protruding shape, and as shown in Figure 28, it protrudes toward the direction of travel (positive direction of the X-axis). Furthermore, the incident-side lens surface 212a'1 is provided asymmetrically with respect to the position where the light-emitting element 210 is positioned. In other words, as shown in Figure 28, the light-emitting element 210 is not positioned on the central axis of the incident-side lens surface 212a'1 when viewed from the Y-axis direction. In this embodiment, it is located toward the positive direction of the X-axis from the central axis of the incident-side lens surface 212a'1 when viewed from the Y-axis direction.

[0159] Furthermore, as shown in Figure 28, the central axes of the light-emitting element 210 and the incident lens surface 212a'1 are not located at the same central axis as the exit lens surface 212a'2 when viewed from the Y-axis direction. In this embodiment, the central axes of the light-emitting element 210 and the incident lens surface 212a'1 are located in the negative direction of the X-axis from the central axis of the exit lens surface 212a'2 when viewed from the Y-axis direction.

[0160] As shown in Figure 28, a pro-beam light distribution method that distributes light in the direction of travel may be adopted with the above-described configuration. This makes it possible to suppress glare from the light when passengers look at the lighting device 400.

[0161] In this embodiment, a pro-beam light distribution was achieved by making the lens shape asymmetrical, but of course, this is not the only way to achieve it. A pro-beam light distribution may also be achieved by arranging the light source module 21C in the direction of travel.

[0162] <Other variations> Next, other modifications of the present invention will be described. In this embodiment, the light emitted from the first light source module 21 was emitted through the first window member 120, but of course, it is not limited to this, and the upper wall portion S1 may also be made of a light-transmitting material such as tempered glass or reinforced plastic, similar to the window member 120. This makes it possible for the light reflected (emitted) to the upper wall portion S1 to also be emitted to the outside, thus making the surroundings brighter.

[0163] Furthermore, the light emitted from the second light source module 2100 was emitted through the second window member 1200, but of course, it is not limited to this, and the upper wall (positive Z-axis side) of the first casing 1100 may also be made of a light-transmitting material such as tempered glass or reinforced plastic, similar to the window member 120. This makes it possible for the light reflected (emitted) to the upper wall side to also be emitted to the outside, thus making the surroundings brighter.

[0164] In this embodiment, the length of the first reflective member 22 in the X-axis direction is approximately the same as the length of the LED substrate 211 in the X-axis direction, but this is not limited to this, and the length of the reflective member 22 in the X-axis direction may be longer. In other words, the reflective members 22 are provided so that they extend from both ends of the LED substrate 211 in the X-axis direction when viewed from the Z-axis direction. As a result, even light emitted from both ends of the LED substrate 211 in the X-axis direction is reflected by the first window member 120, and then reflected again by the first reflective member 22, allowing the light to be emitted in a direction along the direction of travel of the road R, for example, to illuminate the walls inside a tunnel more brightly.

[0165] Although embodiments of the present invention have been described above, it goes without saying that the present invention is not limited to the embodiments described above and can be modified in various ways.

[0166] For example, in the above embodiment, the lighting device 1 was configured as a low-position lighting device for a roadway such as a highway, but the present invention is not limited to this, and can also be applied to lighting devices for advertisements, exhibits, etc. Furthermore, in this embodiment, the light-emitting element was described as being multiple, but of course, it is not limited to this, and may be single, and is not limited to LEDs, but may be fluorescent lamps, for example. Also, in this embodiment, one second lighting device was attached to the first lighting device, but of course, the present invention is not limited to this, and two or more second lighting devices may be attached. [Explanation of symbols]

[0167] 10...Main unit of the device 20,220… Optical Unit 21, 21A, 21B… Light source modules 22, 22A, 22B… Reflective material 81,82...legs 100,200... Lighting devices 110...Casing 120... Window components 210…Light-emitting element 211…LED board 212... Lens array 215...Support plate part 221,221A,221B…Reflective surface 222…Fixing plate part S3...Back wall

Claims

1. A first lighting fixture having a first light source module that emits first light toward the road surface, and a first casing that houses the first light source module, A second illuminator capable of emitting light and mounted in any orientation relative to the first casing, A lighting device equipped with the following features.

2. A lighting device according to claim 1, The second luminaire comprises a second light source module that emits a second light having a different emission range from the first light, and a second casing that can be mounted in any orientation relative to the first casing and houses the second light source module. Lighting device.

3. A lighting device according to claim 1, The light emitted from the second lighting fixture is directed in a direction aligned with the direction of travel along the road. Lighting device.

4. The lighting device according to claim 2, The light emitted from the second lighting fixture is emitted in the direction forward of the road's direction of travel. Lighting device.

5. A lighting device according to claim 1, The first light source module includes one or more light-emitting elements disposed inside the first casing and having an optical axis perpendicular to the direction of travel of the road, and one or more lens portions covering the light-emitting elements and including a lens surface that distributes light in the direction of the optical axis and in an oblique direction inclined at a predetermined angle from the direction of the optical axis to both sides of the direction of travel. Lighting device.

6. A lighting device according to claim 1, The second lighting fixture is installed in the first casing, in the direction of travel of the road. Lighting device.

7. The lighting device according to claim 2, The second light source module emits a plurality of second lights with different emission ranges from each other. Lighting device.

8. A lighting device according to claim 7, The plurality of second lights emitted from the second light source module are each emitted in a direction along the direction of travel on the road. Lighting device.

9. A lighting device according to claim 8, Some of the aforementioned plurality of second lights are emitted toward the road surface ahead in the direction of travel of the road. Lighting device.

10. A lighting device according to claim 9, Some of the aforementioned second beams of light are emitted upwards above the road surface ahead in the direction of travel of the road. Lighting device.

11. A lighting device according to claim 1, The second lighting fixture further comprises a support frame for attaching the second casing to the first casing, The support frame allows for adjustment of the angle of the second casing relative to the road surface. Lighting device.

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