Luminaire

Abstract

To provide a luminaire which can achieve expansion of an installation interval.SOLUTION: A luminaire includes: a casing which is long in an uniaxial direction; a window member; a light source module; and a reflection member. The window member is mounted on the casing. The light source module includes a plurality of light emitting elements and a lens array. The plurality of light emitting elements is arrayed inside the casing along the uniaxial direction, and has an optical axis in the direction orthogonal to the uniaxial direction. The lens array includes a plurality of lens parts each of which has a lens surface that covers the plurality of light emitting elements individually and that further enhances the light distribution intensity in an oblique direction inclined by a predetermined angle to both sides in the uniaxial direction from an optical direction than the light distribution intensity in the optical axis direction. The reflection member is arranged inside the casing, and includes a reflection surface reflecting emission light from the light source module toward the window member.SELECTED DRAWING: Figure 5

Description

Technical Field

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

Background Art

[0002] As a lighting lamp installed on a highway or the like, generally, a method of illuminating the road from a high position using a pole is used, but there are problems such as light leakage to the outside of the road in a residential area, installation cost, and high-altitude work. Therefore, in recent years, the development of a low-position lighting method in which a lighting fixture is installed at a low position about 1 m from the road surface has been promoted.

[0003] As this type of low-position lighting device, for example, Patent Document 1 discloses a lighting device including a casing, a window member attached to the casing, and a base member installed inside the casing. The base member has a support plate portion having a support surface on which a plurality of light-emitting elements are mounted, a reflecting mirror portion integrally formed with the support plate portion and reflecting the emitted light from the plurality of light-emitting elements toward the window member, and a light-shielding plate portion integrally formed with the support plate portion and restricting the incidence of the emitted light from a predetermined direction to the window member.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the lighting device described in Patent Document 1, only the light distribution control in the vertical direction (height direction) by the reflecting mirror portion is possible, so the installation interval of the lighting fixtures cannot be widened. Therefore, there is a problem that it is necessary to install a large number of such lighting devices to illuminate the road with the target illuminance.

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

Means for Solving the Problems

[0007] A lighting device according to one embodiment of the present invention includes a casing elongated in a uniaxial direction, a window member, a light source module, and a reflecting member. The window member is attached to the casing. The light source module has a plurality of light emitting elements and a lens array. The plurality of light emitting elements are arranged along the uniaxial direction inside the casing and have optical axes in a direction orthogonal to the uniaxial direction. The lens array includes a plurality of lens portions each having a lens surface that individually covers the plurality of light emitting elements and increases the light distribution intensity in an oblique direction inclined by a predetermined angle from the optical axis direction to both sides in the uniaxial direction rather than the light distribution intensity in the optical axis direction. The reflecting member is disposed inside the casing and has a reflecting surface that reflects the light emitted from the light source module toward the window member.

[0008] Since the above lighting device includes a lens array that emits the light emitted from each light emitting element in an oblique direction with a higher light distribution intensity than the optical axis direction, the illuminance in the width direction of the lighting device along the longitudinal direction of the casing increases, and thereby the installation interval of the lighting device can be increased.

[0009] The light source module may further have a support plate portion that supports the plurality of light emitting elements and the lens array and is attached to the reflecting member.

[0010] The casing may have a rear wall portion facing the window member, and the reflecting member may further have a fixing plate portion fixed to the rear wall portion together with the support plate portion.

[0011] The reflecting surface may have a curved surface shape with a uniform cross-sectional shape in the uniaxial direction.

[0012] The reflecting surface may have uneven portions locally provided in a partial region on the fixed plate portion side.

[0013] The reflecting member may include a first reflecting member and a second reflecting member. The first reflecting member reflects a part of the light emitted from the light source module toward the window member with a first light distribution characteristic. The second reflecting member reflects another part of the light emitted from the light source module toward the window member with a second light distribution characteristic different from the first light distribution characteristic.

[0014] The first reflecting member may be arranged adjacent to the second reflecting member in the uniaxial direction.

[0015] Typically, the casing is installed with the uniaxial direction facing a direction parallel to the installation surface.

Advantages of the Invention

[0016] According to the present invention, it is possible to increase the illuminance in the width direction of the lighting device along the longitudinal direction of the casing and to expand the installation interval of the lighting device.

Brief Description of the Drawings

[0017]

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Mode for Carrying Out the Invention

[0018] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0019] <First Embodiment> FIG. 1 is a perspective view of a lighting device 100 according to an embodiment of the present invention, FIG. 2(A) is its front view, FIG. 2(B) is its bottom view, FIG. 2(C) is its side view, and FIG. 3 is its exploded perspective view. In FIGS. 1 and 3, the X-axis, Y-axis, and Z-axis indicate three mutually orthogonal axial directions, where the X-axis corresponds to the left-right direction (width direction), the Y-axis corresponds to the front-rear direction, and the Z-axis corresponds to the height direction, respectively.

[0020] The lighting device 100 of the present embodiment is configured as a low-position lighting lamp installed on, for example, an expressway. The lighting device 100 includes a device main body 10 and a pair of legs 81 and 82 that support the device main body 10. The device main body 10 has a casing 110, built-in components such as an optical unit 20, a terminal block 31, and a power supply unit 32, which will be described later, installed inside the casing 110, and a window member 120 that covers the inside of the casing 110.

[0021] FIG. 4 is a schematic plan view showing an installation example of the lighting device 100 on a road. In the figure, W1 is a parapet wall, W2 is a median strip, Tz1 is a first traffic lane, Tz2 is a second traffic lane, and Rs is a roadside strip. As shown in the figure, a plurality of lighting devices 100 are installed on the parapet wall W1 at a predetermined interval in the vehicle traveling direction with the window member 120 facing the median strip W2 side. The lighting device 100 irradiates the emitted light L from the light source unit 20 through the window member 120 in a direction orthogonal to the traffic lanes Tz1 and Tz2 toward the median strip W2. The installation height of the lighting device 100 with respect to the parapet wall W1 is not particularly limited and is, for example, 1.2 m. The lighting device 100 may be installed not only on the parapet wall W1 but also on the median strip W2.

[0022] [Overall Configuration of Lighting Device] FIG. 5 is a cross-sectional view taken along line A-A in FIG. 2(A). Hereinafter, the overall configuration of the lighting device 100 will be described with reference to FIG. 5 as well.

[0023] (Casing) The casing 110 has a substantially rectangular parallelepiped shape that is elongated in a uniaxial direction (X-axis direction). The casing 110 has a three-part structure including a main block 111 extending in the X-axis direction and a pair of side blocks 131 and 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 and 132 are made of a metal material such as an aluminum alloy, for example.

[0024] The main block 111 is formed in a substantially U-shaped cross-section having an upper wall portion S1 and a bottom wall portion S2 each longitudinally extending in the X-axis direction, and a rear wall portion S3 (see FIG. 5). The main block 111 is composed of a molded body having a uniform cross-section perpendicular to the X-axis direction, and is manufactured by an extrusion molding method in the present embodiment.

[0025] On the other hand, the window member 120 is composed of a translucent material such as tempered glass or reinforced plastic having a long side in the X-axis direction. The window member 120 is formed in a shape similar to the front shape (the shape viewed from the X-axis direction) of the casing 110. The window member 120 is attached to the front side of the casing 110 so as to face the rear wall portion S3 in the X-axis direction.

[0026] In the present embodiment, the window member 120 is rotatably attached to the casing 110. A plurality of hinge members 71 for supporting the upper long side portion of the window member 120 are attached to the upper wall portion S1 of the casing 110 (main block 111). Thereby, since the inside of the apparatus main body 10 can be opened by rotating the window member 120, the maintainability of built-in components such as the optical unit 20, the terminal block 31, and the power supply unit 32 installed inside the apparatus main body 10 is ensured.

[0027] Further, a plurality of stoppers 72 capable of latching the lower long side portion of the window member 120 are attached to the bottom wall portion S3 of the casing 110 (main block 111). The stopper 72 is composed of a ring portion attached to the casing 110 side and a hook portion attached to the window member 120 side, and the ring portion and the hook portion are engaged with each other at the position where the window member 120 closes the casing 110. Thereby, the inadvertent rotation of the window member 120 is prevented.

[0028] As shown in FIG. 1, the window member 120 is formed with a window portion W that transmits the light emitted from the optical unit 20. The window portion W is rectangular and longitudinally extends in the X-axis direction, and is partially formed in a region facing the optical unit 20 in the Y-axis direction. The region other than the window portion W of the window member 120 is covered with a black light-shielding layer Wb formed on the inner surface side of the window member 120. The light-shielding layer Wb is for preventing the region other than the region corresponding to the optical unit 20 in the casing 110 from being visually recognized from the outside, and can be omitted as necessary depending on the size of the casing 110 or the optical unit 20.

[0029] As described above, the main block 111 of the casing 110 is formed of a molded body having a uniform cross-sectional shape in the X-axis direction. The main block 111 has seven guide grooves G1 to G7 extending parallel to the X-axis direction. Specifically, the guide grooves G1, G2, and G3 are formed on the inner surface side of the rear wall portion S3, and the guide grooves G4 and G5 are formed on the outer surface side of the bottom wall portion S2. The guide groove G6 is formed at the front end of the upper wall portion S1, and the guide groove G7 is formed at the front end of the bottom wall portion S2.

[0030] Each of the guide grooves G1 to G7 is formed over the entire width direction (X-axis direction) of the main block 111. Among these, the guide grooves G1 to G5 have a return portion that forms an opening width larger than the groove width, and are formed so as to be engageable with the head of a screw member or a bolt member (hereinafter also referred to as a fastener) that fits into each guide groove. The guide grooves G6 and G7 form a housing portion for the seal ring 140 interposed between the main block 111 and the window member 120.

[0031] The guide grooves G1 to G3 are provided at intervals in the height direction (Z-axis direction) of the rear wall portion S3 of the main block 111. In the guide groove G1 located at the uppermost stage, the heads of a plurality of fasteners F1 (see FIG. 5) for fixing the upper ends of the optical unit 20 and the terminal block 31 are engaged. In the guide groove G2 located at the center, the heads of a plurality of fasteners for fixing the power supply unit 32 that supplies power to the optical unit 20 are engaged. In the guide groove G3 located at the lowermost stage, the head of the fastener for fixing the lower end of the terminal block 31 is engaged. Each of the above fasteners fixes the optical unit 20, the terminal block 31, and the power supply unit 32 to the guide grooves G1 to G3 by screwing a nut member N1 (see FIG. 5) onto their shaft portions.

[0032] Incidentally, the power supply unit 32 is disposed between the optical unit 20 and the terminal block 31. The terminal block 31 electrically connects between the power cable inserted into the casing 110 through the bush B attached to one side block 131 and the power supply unit 32.

[0033] The 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. In each of the guide grooves G4 and G5, the heads of the fasteners F2 (see FIG. 5) for fixing the pair of legs 81 and 82 for installing the apparatus main body 10 on the retaining wall W1 are engaged. 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 FIG. 5) onto its shaft portion. Incidentally, the pair of legs 81 and 82 are respectively fixed by two fasteners F2 facing each other in the front-rear direction. The lighting device 100 is installed via these pair of legs 81 and 82 with its longitudinal direction (X-axis direction) parallel to the installation surface.

[0034] The main block 111 further has four screw receivers H1 to H4 extending parallel to the X-axis direction. Specifically, the screw receivers H1 to H4 have a partial cylindrical shape having an axis in the X-axis direction. The partial cylindrical shape means a cylindrical shape with a part of the circumference missing.

[0035] 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 a plurality of screw members P for fixing a pair of side blocks 131, 132 to both ends in the X-axis direction of the main block 111 are screwed.

[0036] A pair of side blocks 131, 132 form both side walls of the casing 110 facing each other in the X-axis direction. The pair of side blocks 131, 132 are attached to both ends in the X-axis direction of the main block 111 and each have an opening 13P with a shape corresponding to the both ends. Each opening 13P of the side blocks 131, 132 is typically fixed to both ends of the main block 111 via a seal ring. The seal rings may each be composed of separate parts or may be integrally formed with the seal ring 140.

[0037] Guide grooves G8, G9 for accommodating the folded-back portions at both ends in the X-axis direction of the seal ring 140 are respectively provided at the front-side ends of the pair of side blocks 131, 132 (see FIG. 3). The guide grooves G8, G9 are continuously connected to the guide grooves G6, G7 provided in the main block 111. Thereby, the seal ring 140 can be stably held between the casing 110 and the window member 120.

[0038] The pair of side blocks 131, 132 have a plurality of screw insertion holes M (see FIG. 3) formed at positions corresponding to the screw receiving portions H1 to H4 of the main block 111. The pair of side blocks 131, 132 are fixed by a plurality of screw members P inserted through the respective screw insertion holes M.

[0039] The apparatus main body 10 further includes a plurality of plug members T embedded in the screw insertion holes M of the side blocks 131 and 132. The plug member T functions as a sealing member for preventing moisture such as raindrops from entering the apparatus main body 10 through the screw insertion hole M.

[0040] (Optical unit) Next, the details of the optical unit 20 will be described.

[0041] The optical unit 20 is an illumination light source emitted from the illumination device 100. The optical unit 20 has a light source module 21 and a reflecting member 22 respectively installed inside the casing 110 as shown in FIGS. 3 and 5.

[0042] The light source module 21 includes an LED substrate 211 on which a plurality of light emitting elements 210 are mounted, a lens array 212 for distributing the emitted light from each light emitting element 210, and a support plate portion 215 for supporting the LED substrate 211 and the lens array 212. FIG. 6(A) is a plan view seen from the light emitting surface of the light source module 21, and FIG. 6(B) is a side view thereof.

[0043] The plurality of light emitting elements 210 are typically semiconductor light emitting elements such as LEDs (Light Emitting Diodes), and the emission color is typically white. In the present embodiment, an LED component that forms white light by combining a blue LED and a yellow phosphor that is its complementary color is adopted, but of course, it is not limited to this.

[0044] The LED substrate 211 is a rectangular circuit board having a long side in the longitudinal direction (X-axis direction) of the casing 110, and a plurality of light emitting elements 210 are mounted on its surface. In the central portion in the width direction of the LED substrate 211, a plurality of female screw members 214 screwed to a plurality of fasteners F3 inserted through the support plate portion 215 are embedded at predetermined intervals in the long side direction. Also, at one end in the long side direction of the LED substrate 211, a connector 213 for connection with a wiring cable (not shown) extending from the power supply unit 32 is mounted.

[0045] In this embodiment, a plurality (two in this example) of LED substrates 211 are aligned in the X-axis direction and mounted on the support plate portion 215. However, the present invention is not limited thereto, and the number of LED substrates 211 may be one. In this case, the longitudinal dimension of the light source unit 20 may be approximately the length of the long side of the LED substrate 211.

[0046] Each light-emitting element 210 is arranged in a single row at a predetermined interval along the long side direction (X-axis direction) on the LED substrate 211, but may be arranged in multiple rows. Each light-emitting element 210 has an optical axis in a direction perpendicular to the normal direction of the LED substrate 211, that is, the longitudinal direction (X-axis direction) of the casing 110. The LED substrate 211 is fixed to the support plate portion 215 using a plurality of fasteners F3 with the mounting surface of the light-emitting element 210 facing downward, that is, toward the reflecting surface 221 of the reflecting member 22.

[0047] The lens array 212 has a plurality of lens portions 212a that individually cover the plurality of light-emitting elements 210. The lens array 212 is fixed on the LED substrate 211 using a plurality of fasteners, adhesives, or the like.

[0048] FIG. 7 is an enlarged side view of a main part showing the light distribution characteristics along the X-axis direction of the emitted light passing through the lens portion 212a.

[0049] Each lens portion 212a includes an incident-side lens surface 212a1 that houses the light-emitting element 210, and an exit-side lens surface 212a2 that enhances the light distribution intensity in an oblique direction inclined by a predetermined angle from the optical axis direction to both sides in the left and right directions (X-axis direction) rather than the light distribution intensity in the optical axis direction of the light-emitting element 210. In this embodiment, the incident-side lens surface 212a1 has a concave shape with a substantially semi-circular cross-section, and the exit-side lens surface 212a2 has a convex shape provided on both sides in the left and right directions with the optical axis direction interposed therebetween. Note that the shapes of the incident-side lens surface 212a1 and the exit-side lens surface 212a2 are not particularly limited, and can be arbitrarily designed as long as the above-described light distribution characteristics can be obtained.

[0050] The support plate portion 215 is formed of a molded body of a metal material such as an aluminum alloy having a uniform cross-sectional shape in the X-axis direction. As shown in FIG. 5, it has an inclined surface portion 215a that supports the LED substrate 211 and a vertical surface portion 215b that is fixed to the rear wall portion S3 of the casing 110. The inclined surface portion 215a extends so as to incline downward at a predetermined angle from the rear wall portion S3 side toward the window member 120, and the LED substrate 211 is attached to the lower surface side thereof. Thereby, it is possible to prevent the light source module 21 from being directly visible from the front of the lighting device 100, and it is possible to suppress the glare of light when the vehicle occupant views the lighting device 100.

[0051] The reflecting member 22 functions as a reflector that supports the light source module 21 and has a reflecting surface 221 that reflects the light emitted from the light source module 21 toward the window member 120. The reflecting member 22 extends in the width direction (X-axis direction) of the casing 110, is formed 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 is manufactured by an extrusion molding method in the present embodiment.

[0052] The reflecting member 22 has a reflecting surface 221 that reflects the light emitted from the light source module 21 toward the window member 120 (window portion W). The reflecting surface 221 is formed as a curved surface that bulges toward the rear wall portion S3 having a uniform cross-sectional shape perpendicular to the longitudinal direction (X-axis direction) of the casing 110.

[0053] The reflecting surface 221 is subjected to a surface treatment such as vapor deposition of a metal film, mirror finishing, or attachment of a metal foil or white PET (polyethylene terephthalate) to enhance the light reflectivity. Note that the other surfaces of the reflecting member 22 other than the reflecting surface 221 are colored black (for example, anodized treatment) to prevent the reflection of stray light in the casing 110.

[0054] The reflecting member 22 further has a fixing plate portion 222, a reference surface portion 223, and a leg plate portion 224.

[0055] The fixed plate portion 222 is fixed to the back wall portion S3 of the casing 110 together with the support plate portion 215 of the light source module 21. The fixed plate portion 222 is fixed together with the support plate portion 215 by a fastener F1 so as to be sandwiched between the vertical surface portion 215b of the support plate portion 215 and the guide groove G1 of the back wall portion S3.

[0056] The reference surface portion 223 positions the light source module 21 by contacting the support plate portion 215 of the light source module 21, and ensures the target inclination of the LED substrate 211 and the relative distance to the reflecting surface portion 221.

[0057] The foot plate portion 224 is a flat plate portion provided so as to protrude from the back side of the reflecting member 22 toward the back wall portion S3 of the casing 110. The tip of the foot plate portion 224 is in contact with the inner surface of the back wall portion S3 (see FIG. 5), whereby the fixed posture of the reflecting member 22 (optical unit 20) in the casing 110 is maintained.

[0058] FIG. 8 is a ray tracing diagram of the emitted light (illumination light L) in the optical unit 20. As shown in the figure, the emitted light from the light source module 21 is reflected by the reflecting member 22 toward the front direction of the illumination device 100, passes through the window member 120, and is irradiated to the outside.

[0059] In this embodiment, since the reflecting surface 221 of the reflecting member 22 is formed in a curved shape, almost all of the emitted light from the light source module 21 can be reflected in the front direction, thereby improving the light utilization efficiency. Further, since the reflecting surface 221 is formed in a curved shape, the emitted light from the light source module 21 can be irradiated to a predetermined irradiation range over a predetermined angle range in the vertical direction (height direction) of the illumination device 100.

[0060] Also, in this embodiment, since the light source module 21 includes a lens array 212 that emits the emitted light from each light emitting element 210 obliquely in a direction with a higher light distribution intensity than the optical axis direction, the illuminance in the left-right direction (width direction) of the illumination device 100 along the longitudinal direction of the casing 110 increases. Thereby, the installation interval of the illumination device 100 can be increased.

[0061] FIG. 9(A) is an illuminance distribution diagram in the left - right direction of the lighting device 100. For comparison, FIG. 9(B) shows an illuminance distribution diagram when the lens array 212 is omitted from this lighting device 100. As shown in FIG. 9(A), according to this embodiment, it can be seen that the irradiation range of light in the left - right direction is significantly widened compared to the case without the lens array (FIG. 9(B)). Thereby, the interval D (see FIG. 4) between the lighting devices 100 installed on the road along the vehicle traveling direction can be enlarged, and the number of installed lamps can be reduced.

[0062] In addition, due to the installation of the lens array 212, light emitted from both ends in the width direction of the lighting device 100 is irradiated onto the road surface (especially the road surface near the lighting device 100) as yellowish light due to the color separation effect of the lens array 212, which may cause color unevenness of the illumination light on the road surface. To solve this problem, in this embodiment, as shown in FIG. 5, uneven portions 221a are locally provided in a part of the region on the fixing plate portion 222 side of the reflecting surface 221. The uneven portions 221a are formed by convex surfaces having a partial spherical shape extending in the left - right direction (X - axis direction) of the casing 110.

[0063] The uneven portions 221a are provided at positions where light emitted from both ends of the light source module 21 reaches, and as shown in FIG. 8, the light incident on the uneven surface 221a is lifted and reflected in the front direction. Thereby, the emitted light (yellowish light) separated by color at both ends of the lens array 212 is reflected forward (in the front direction), so that the occurrence of color unevenness on the road surface near the lighting device 100 is suppressed.

[0064] <Second Embodiment> In this type of low - position lighting device, since the optimal light distribution is different according to the shoulder width (or roadside strip width) and the lane width, there is a problem that it is necessary to prepare a plurality of types of lighting devices with different light distributions so as to cope with the shoulder width and the like. Therefore, in this embodiment, a lighting device applicable to roads with different shoulder widths and lane widths will be described.

[0065] FIG. 10 is an exploded perspective view of a lighting device 200 according to another embodiment of the present invention. Hereinafter, parts similar to those in the first embodiment in terms of configuration and operation will be omitted or simplified in description, and the description will focus on parts different from the first embodiment.

[0066] In the lighting device 200 of this embodiment, the configuration of the optical unit is different from that of the first embodiment. The optical unit 220 of this embodiment has a reflecting member 22 including a first reflecting member 22A and a second reflecting member 22B.

[0067] FIG. 11 is a perspective view of the optical unit 220 as seen from the front direction, and FIG. 12 is a side view of the optical unit 220 as seen from the X-axis direction.

[0068] The first reflecting member 22A and the second reflecting member 22B are arranged adjacent to each other in the longitudinal direction (X-axis direction) of the casing 110. Both the first reflecting member 22A and the second reflecting member 22B have the same configuration, but the reflection surfaces 221A and 221B have different light reflection characteristics (light distribution characteristics).

[0069] In this embodiment, the first reflecting member 22A is configured as a reflecting member for a narrow road shoulder with a relatively narrow road shoulder width (for example, 0.5 m) (or a roadside strip; the same applies hereinafter). On the other hand, the second reflecting member 22B is configured as a reflecting member for a wide road shoulder with a relatively wide road shoulder width (for example, 2 m).

[0070] More specifically, in this embodiment, as shown in FIG. 12, the reflection surface 221A of the first reflecting member 22A is designed such that the incident angle of the light emitted from the light source module 21 with respect to the reflection surface 221A (the incident angle based on the normal direction of the reflection surfaces 221A and 221B) is larger than that of the second reflecting member 22B, and the curvatures of both reflection surfaces 221A and 221B are designed accordingly.

[0071] As a result, the first reflecting member 22A reflects the light emitted from the light source module 21 toward the window member 120 at a reflection angle larger than that of the second reflecting member 22B, and the second reflecting member 22B reflects the light emitted from the light source module 21 toward the window member 120 at a reflection angle smaller than that of the first reflecting member 22A. As a result, the light reflected by the second reflecting member 22B is irradiated onto a region farther than the light reflected by the first reflecting member 22A. Thus, the lighting device 200 of the present embodiment is configured to irradiate combined light of reflected light by the first reflecting member 22A and the second reflecting member having different reflection characteristics from each other.

[0072] The light source module 21 is divided into a first light source module 21A and a second light source module 22B so as to correspond to the first reflecting member 22A and the second reflecting member 22B. Each of the light source modules 21A and 21B has the same configuration and is positioned via the reference surface portion 223 of each of the reflecting members 22A and 22B adjacent to each other in the width direction (X-axis direction) of the casing 110 (see FIG. 12). Each of the reference surface portions 223 is formed so as to belong to the same plane, and thus each of the light source modules 21A and 21B is also arranged on the same plane.

[0073] Also in the present embodiment, since each of the light source modules 21A and 21B includes the lens array 212, the illuminance in the left-right direction (width direction) of the lighting device 200 along the longitudinal direction of the casing 110 increases as in the first embodiment.

[0074] FIG. 13(A) shows an example of the illuminance distribution of the light reflected by the first reflecting member 22A, and FIG. 13(B) shows an example of the illuminance distribution of the light reflected by the second reflecting member 22B. Further, FIG. 14 is an illuminance distribution diagram of the combined light of the reflected light by the first reflecting member 22A and the reflected light by the second reflecting member 22B.

[0075] As described above, according to the present embodiment, a single lighting device 200 can be applied to different uses for narrow road shoulders and wide road shoulders. Further, by mounting the reflecting members 22A and 22B having different light distribution characteristics, there is an advantage that the illuminance of the first traffic lane Tz1 and the second traffic lane Tz2 can be made uniform. Furthermore, according to the present embodiment, by applying it to the lighting of the curved area of the road, for example, there is an advantage that the illumination light can be emitted over a wider range on the exit side of the curve.

[0076] As described above, the embodiments of the present invention have been described. However, the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made.

[0077] For example, in the above embodiment, the lighting devices 100 and 200 are configured as low-position lighting devices for lanes such as highways. However, the present invention is not limited thereto, and the present invention is also applicable to lighting devices for advertisements, exhibits, and the like.

Explanation of Reference Numerals

[0078] 10... Device main body 20, 220... Optical unit 21, 21A, 21B... Light source module 22, 22A, 22B... Reflecting member 81, 82... Leg portion 100, 200... Lighting device 110... Casing 120... Window member 210... Light-emitting element 211... LED substrate 212... Lens array 215... Support plate portion 221, 221A, 221B... Reflecting surface 222... Fixed plate portion S3... Rear wall portion

Claims

1. A casing that is long in one axial direction, a window member attached to the casing, a plurality of light-emitting elements arranged along the one axial direction inside the casing and having optical axes in a direction orthogonal to the one axial direction, and a lens array having a plurality of lens portions including lens surfaces that individually cover the plurality of light-emitting elements and enhance the light distribution intensity in an oblique direction inclined by a predetermined angle from the optical axis direction to both sides in the one axial direction with respect to the light distribution intensity in the optical axis direction, and a light source module having: a reflecting member disposed inside the casing and having a reflecting surface that reflects the emitted light from the light source module toward the window member A lighting device comprising.

2. The lighting device according to claim 1, wherein the light source module further has a support plate portion that supports the plurality of light-emitting elements and the lens array and is attached to the reflecting member A lighting device.

3. The lighting device according to claim 2, wherein the casing has a back wall portion facing the window member, wherein the reflecting member further has a fixing plate portion that is fixed to the back wall portion together with the support plate portion A lighting device.

4. The lighting device according to claim 3, wherein the reflecting surface has a curved surface shape with a uniform cross-sectional shape perpendicular to the one axial direction A lighting device.

5. The lighting device according to claim 3, wherein the reflecting surface has uneven portions locally provided in a partial region on the fixing plate portion side A lighting device.

6. The lighting device according to claim 1, wherein the reflecting member a first reflecting member that reflects a part of the emitted light from the light source module toward the window member with a first light distribution characteristic, a second reflecting member that reflects the other part of the emitted light from the light source module toward the window member with a second light distribution characteristic different from the first light distribution characteristic, and having A lighting device.

7. The lighting device according to claim 6, wherein the first reflecting member is disposed adjacent to the second reflecting member in the one axial direction A lighting device.

8. The lighting device according to any one of claims 1 to 7, wherein the casing is installed with the one axial direction oriented parallel to the installation surface A lighting device.

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