Luminaire

Abstract

To provide a luminaire which is applicable to roads having different road shoulder widths and traffic lane widths.SOLUTION: A luminaire includes a casing, a window member, an optical unit, and a rotary mechanism. The window member is mounted on the casing. The optical unit has a light source module and a reflection mirror part. The light source module includes a plurality of light emitting elements arrayed along a uniaxial direction inside the casing and has an optical axis in the direction orthogonal to the uniaxial direction. The reflection mirror part reflects the emission light from the plurality of light emitting elements toward the window member. The rotary mechanism is constituted in such a manner that at least one of the light source module and the reflection mirror part is rotatable around the uniaxis.SELECTED DRAWING: Figure 11

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 such as residential areas, installation costs, 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 having 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 this type of lighting device, since the optimum light distribution is different according to the shoulder width (or the roadside strip width) and the lane width, there is a problem that it is necessary to prepare a plurality of types of lighting devices having different light distributions so as to cope with the shoulder width and the like.

[0006] In view of the above circumstances, an object of the present invention is to provide a lighting device applicable to roads with different shoulder widths and lane widths.

Means for Solving the Problems

[0007] The lighting device according to one embodiment of the present invention includes a casing, a window member, an optical unit, and a rotation mechanism. The window member is attached to the casing. The optical unit has a light source module and a reflecting mirror portion. The light source module has a plurality of light emitting elements arranged along a uniaxial direction inside the casing and having an optical axis in a direction orthogonal to the uniaxial direction. The reflecting mirror portion reflects the emitted light from the plurality of light emitting elements toward the window member. The rotation mechanism is configured to be able to rotate at least one of the light source module and the reflecting mirror portion around the uniaxial direction.

[0008] Since the above lighting device includes a rotation mechanism configured to be able to rotate at least one of the light source module and the reflecting member around the uniaxial direction, it is applicable to roads with different shoulder widths and lane widths.

[0009] The rotation mechanism may be configured to integrally rotate the light source module and the reflecting mirror portion around the uniaxial direction.

[0010] The optical unit may further have a support plate portion formed integrally with the reflecting mirror portion and supporting the light source module.

[0011] The casing may have a back wall portion facing the window member. The rotation mechanism may have a fixing plate portion fixed to the back wall portion, a rotation shaft penetrating the fixing plate portion and parallel to the uniaxial direction, a movable plate portion attached to the optical unit and capable of rotating the optical unit around the rotation shaft, and a fastening member attached to the fixing plate portion and capable of fastening the movable plate portion to the fixing plate portion.

[0012] The reflecting mirror part may have a reflecting surface with a curved surface shape having a uniform cross-sectional shape perpendicular to the uniaxial direction.

[0013] The casing may be installed with the uniaxial direction facing a direction parallel to the installation surface.

Effect of the Invention

[0014] According to the present invention, it is possible to provide a lighting device applicable to roads with different shoulder widths and lane widths.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Best Mode for Carrying Out the Invention

[0016] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0017] FIG. 1 is a perspective view of a lighting device 100 according to an embodiment of the present invention, FIG. 2(A) is a front view thereof, FIG. 2(B) is a bottom view thereof, FIG. 2(C) is a side view thereof, and FIG. 3 is an exploded perspective view thereof. 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, the Y-axis corresponds to the front-back direction, and the Z-axis corresponds to the height direction. In FIG. 3, illustration of a rotation mechanism described later is omitted.

[0018] The lighting device 100 of the present embodiment is configured as a low-position lighting lamp installed, for example, on a highway or the like. 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 includes 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, a rotation mechanism 90 that rotatably supports the optical unit 20 about the X-axis, and a window member 120 that covers the inside of the casing 110.

[0019] 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, 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 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 W1 is not particularly limited and is, for example, 1.2 m. The lighting device 100 may be installed not only on the parapet W1 but also on the median strip W2.

[0020] [Overall Configuration of Lighting Device] FIG. 5 is a front view of the lighting device 100 when the window member 120 is removed, and FIG. 6 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 FIGS. 5 and 6 as well.

[0021] (Casing) The casing 110 has a substantially rectangular parallelepiped shape elongated in the 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.

[0022] The main block 111 is made of a metal material such as an aluminum alloy and is formed in a substantially U-shaped cross-section having an upper wall portion S1 and a bottom wall portion S2 each elongated in the X-axis direction and a rear wall portion S3 (see FIG. 6). The main block 111 is composed of a molded body with a uniform cross-section perpendicular to the X-axis direction and is manufactured by an extrusion molding method in this embodiment.

[0023] On the other hand, the window member 120 is made 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 seen 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.

[0024] In this embodiment, the window member 120 is rotatably attached to the casing 110. A plurality of hinge members 71 that support 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, as shown in FIG. 6, since the inside of the device main body 10 can be opened by rotating the window member 120, the maintainability of the built-in components such as the optical unit 20, the terminal block 31, and the power supply unit 32 installed inside the device main body 10 is ensured.

[0025] In addition, 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.

[0026] As shown in FIG. 1, a window portion W for transmitting the light emitted from the optical unit 20 is formed in the window member 120. The window portion W is a rectangle elongated 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 Wb 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 may be omitted as necessary depending on the size of the casing 110 or the optical unit 20.

[0027] 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 (see FIG. 6). Specifically, the guide grooves G1, G2, and G3 are formed on the inner surface side of the rear wall portion S2, 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 portion of the upper wall portion S1, and the guide groove G7 is formed at the front end portion of the bottom wall portion S2.

[0028] 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 fastening member) fitted 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.

[0029] 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 fastening members F1 (see FIG. 6) for fixing the upper end of the rotation mechanism 90 and the upper end of the terminal block 31 are engaged. In the guide groove G2 located at the center, the heads of a plurality of fastening members for fixing the lower end of the rotation mechanism 90 and 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 fastening member for fixing the lower end of the terminal block 31 is engaged. Each of the above-mentioned fastening members fixes the optical unit 20, the terminal block 31, and the power supply unit 32 to the guide grooves G1 to G3, respectively, by screwing a nut member N1 (see FIG. 6) onto their shaft portions.

[0030] Note that 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.

[0031] 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 fastening members F2 (see FIG. 6) for fixing a pair of leg portions 81 and 82 for installing the apparatus main body 10 on the retaining wall W1 are engaged. Each of the fastening members F2 fixes the pair of leg portions 81 and 82 to the guide grooves G4 and G5, respectively, by screwing a nut member N2 (see FIG. 6) onto its shaft portion. Note that the pair of leg portions 81 and 82 are respectively fixed by two fastening members F2 facing each other in the front-rear direction. The lighting device 100 is installed via these pair of leg portions 81 and 82 with the longitudinal direction (X-axis direction) oriented parallel to the installation surface.

[0032] The main block 111 further has four screw receiving portions H1 to H4 extending parallel to the X-axis direction. Specifically, the screw receiving portions 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.

[0033] 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 portion 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 and 132 to both ends in the X-axis direction of the main block 111 are screwed.

[0034] A pair of side blocks 131 and 132 form both side walls of the casing 110 facing each other in the X-axis direction. A pair of side blocks 131 and 132 are attached to both ends in the X-axis direction of the main block 111, and each has an opening 13P having a shape corresponding to the both ends. Each opening 13P of the side blocks 131 and 132 is typically fixed to both ends of the main block 111 via a seal ring. The seal rings may each be composed of a single component, or may be integrally formed with the seal ring 140.

[0035] Guide grooves G8 and 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 and 132 (see FIG. 3). The guide grooves G8 and G9 are continuously connected to the guide grooves G6 and 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.

[0036] A pair of side blocks 131 and 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. A pair of side blocks 131 and 132 are fixed by a plurality of screw members P inserted through the respective screw insertion holes M.

[0037] The apparatus main body 10 further includes a plurality of plug members T (see FIG. 1) 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.

[0038] (Optical unit) Next, the details of the optical unit 20 will be described.

[0039] The optical unit 20 is a light source unit for the illumination light emitted from the illumination device 100. As shown in FIGS. 3 and 6, the optical unit 20 is installed inside the casing 110 and has a base member 21 and a plurality of LED substrates 22.

[0040] The base member 21 supports the LED substrates 22 (light source modules) that support a plurality of light emitting elements, and has a function as a reflector that reflects the light emitted from the LED substrates 22 toward the window member 120. The base member 21 extends in the width direction (X-axis direction) of the casing 110, and 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 this embodiment.

[0041] As shown in FIG. 6, the base member 21 has a support plate portion 211, a mirror portion 212, and a light shielding plate portion 213, which are integrally and continuously formed in the X-axis direction.

[0042] The support plate portion 211 has a support surface 211a on which the LED substrate 22 is mounted. The mirror portion 212 is integrally formed with the support plate portion 211 and reflects the light emitted from the LED substrate 22 toward the window member 120. The light shielding plate portion 213 is integrally formed with the support plate portion 211 and regulates the incidence of the emitted light from a predetermined direction to the window member 120.

[0043] FIG. 7(A) is a plan view of the optical unit 20 as viewed from the Z-axis direction, and FIG. 7(B) is a front view of the optical unit 20 as viewed from the Y-axis direction. FIG. 8(A) is a plan view showing the light-emitting element mounting surface of the LED substrate 22, and FIG. 8(B) is a side view of the LED substrate 22.

[0044] The LED substrate 22 corresponds to the light source module in the present invention, and includes a circuit board 221 having a long side in the X-axis direction and a plurality of light-emitting elements 222 mounted on the circuit board 221. The circuit board 221 has a rectangular shape that is long in the X-axis direction, and a plurality of female screw members 224 that are screwed to a plurality of fasteners V inserted through the support plate portion 211 of the base member 21 are embedded at predetermined intervals in the X-axis direction at the central portion thereof. Further, a connector 223 for connection to a wiring cable (not shown) extending from the power supply unit 32 is mounted at one end in the longitudinal direction of the circuit board 221.

[0045] In the present embodiment, a plurality (two in this example) of LED substrates 22 are mounted on the support surface 211a in alignment in the X-axis direction (see FIG. 3). However, the present invention is not limited to this, and for example, as shown in FIG. 10, the optical unit 20 may include only one LED substrate 22. In this case, the length of the optical unit 20 in the width direction (X-axis direction) may be shorter (about half the length) than the length of the optical unit 20 shown in FIG. 5.

[0046] The plurality of light-emitting elements 222 are typically semiconductor light-emitting elements such as LEDs (Light Emitting Diodes), and the emission color is typically white. The plurality of 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 may be arranged in multiple rows. The plurality of light-emitting elements 222 have optical axes in a direction orthogonal to the X-axis direction. The LED substrate 22 is fixed on the support surface 211a of the support plate portion 211 via a plurality of fasteners with the mounting surface of the light-emitting element 222 facing the mirror portion 212.

[0047] 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 casing 110 and a second long side portion L2 facing the window member 120 on the opposite side (see Fig. 7(A)). The LED substrate 22 has a plurality of light-emitting elements 222 arranged biased toward one long side of the circuit board 221 (see Fig. 8(A)), and is arranged on the support surface 211a of the support plate portion 211 such that one long side thereof faces the first long side L1 side of the support plate portion 211.

[0048] Furthermore, the support plate portion 211 is inclined downward at a predetermined angle from the first long side portion L1 toward the second long side portion L2, and the support surface 211a for supporting the LED substrate 22 is set on the lower surface side of the support plate portion 211. Thereby, direct visual recognition of the light-emitting elements 222 from the front of the lighting device 100 can be blocked, and glare of the light when the vehicle occupant views the lighting device 100 can be suppressed.

[0049] The reflecting mirror portion 212 of the base member 21 reflects the light emitted from the light-emitting elements 222 toward the window member 120 in the Y-axis direction. In the present embodiment, the reflecting mirror 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 Fig. 6). By presenting a curved (curved surface) shape in which the light reflecting surface of the reflecting mirror portion 212 bulges toward the back wall portion S3, the light emitted from the light-emitting elements 222 can be efficiently reflected in the front direction. Since the LED substrate 22 is mounted on the lower surface side of the support plate portion 211, the reflecting mirror portion 212 is arranged below the support plate portion 211.

[0050] Fig. 9 is a ray tracing diagram of the emitted light (lighting light L) in the optical unit 20. As shown in the figure, the light emitted from the light-emitting elements 222 is reflected by the reflecting mirror portion 212 of the base member 21 toward the front direction of the lighting device 100, passes through the window member 120, and is irradiated to the outside. Since the reflecting mirror portion 212 is formed in a curved shape, almost all of the light emitted from the light-emitting elements 222 can be reflected in the front direction, thereby enhancing the light utilization efficiency.

[0051] The curved surface 212a that reflects the outgoing light is subjected to a surface treatment such as mirror finishing or application of a metal foil or white PET (polyethylene terephthalate) to enhance the light reflectance. Note that the other surfaces of the base member 21 other than the curved surface 212a are colored black (for example, anodized) to prevent reflection of stray light within the casing 110.

[0052] The light shielding plate portion 213 of the base member 21 is provided on the second long side portion L2 of the support plate portion 211. As described above, the light shielding plate portion 213 has a function of restricting the incidence of the outgoing light from the light emitting element 222 in a predetermined direction to the window member 120. The predetermined direction refers to a direction in which the incident angle with respect to the window member 120 is a predetermined angle or more.

[0053] (Rotation mechanism) Subsequently, the details of the rotation mechanism 90 will be described. Here, the rotation mechanism 90 applied to the optical unit 20A shown in FIG. 10 will be described as an example. Note that the rotation mechanism 90 described below can be similarly applied to the optical units 20 shown in FIGS. 3 and 5.

[0054] FIG. 10 is a front view of the optical unit 20A and the rotation mechanism 90 viewed from the Y-axis direction, and FIG. 11 is a side view thereof viewed from the X-axis direction.

[0055] The rotation mechanism 90 includes two rotation mechanism portions 90A and 90B that support each end portion in the longitudinal direction of the optical unit 20A. The rotation mechanism portions 90A and 90B have the same configuration, but are configured in shapes that are symmetric with respect to each other with respect to the YZ plane. Hereinafter, the rotation mechanism portion 90B that supports the left end portion of the optical unit 20A when viewed from the front direction (FIG. 10) will be described as a representative example.

[0056] The rotation mechanism portion 90B has a fixed plate portion 91, a movable plate portion 92, a fastening member 93, and a rotation shaft P1. The fixed plate portion 91 is fixed to the back wall portion S2 of the casing 110 using a fastener F1 and a nut member N1. The rotation shaft P1 is a screw member having a shaft portion parallel to the X-axis direction and passing through the fixed plate portion 91. The movable plate portion 92 is attached to the optical unit 20A and is configured to be able to rotate the optical unit 20A (base member 21) around the rotation shaft P1. The fastening member 93 is a screw member attached to the fixed plate portion 91 and capable of fastening the movable plate portion 92 to the fixed plate portion 91.

[0057] 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 hole portions through which the shaft portion of the fastener F1 passes, and is fixed to the back wall portion S3 (guide grooves G1, G2) via two fasteners F1 passing through these hole portions (see FIG. 11). The second plate portion 912 has a hole portion through which the rotation shaft P1 passes, and rotatably supports the movable plate portion 92 via this rotation shaft P1. The second plate portion 912 further has a long hole portion 91a through which the shaft portion of the fastening member 93 passes. The long hole portion 91a is formed in a partial arc shape with the distance between the rotation shaft P1 and the shaft portion of the fastening member 93 as the radius. In the present embodiment, the arc length of the long hole portion 91a is set so that the optical unit 20A can be rotated around the rotation shaft P1 over a predetermined angle range (for example, 20 degrees).

[0058] The movable plate portion 92 has a first arm portion 921 and a second arm portion 922 each parallel to the YZ plane, and a connecting portion 923 connecting the first arm portion 921 and the second arm portion 922. FIG. 12(A) is a side view of the movable plate portion 92, and FIG. 12(B) is a front view of the movable plate portion 92.

[0059] The first arm portion 921 has two hole portions 921a through which the shaft portions of two fasteners P2 pass, and is fixed to the end portion of the optical unit 20 via two fasteners P2 passing through these hole portions 921a. In the present embodiment, it is screwed onto two partial cylindrical screw receiving portions 214 (see FIG. 6) formed parallel to the X-axis direction on the upper surface of the support plate portion 211 of the base member 21.

[0060] The second arm portion 922 has a screw hole portion 922a through which the rotation axis P1 penetrates, and a screw hole portion 922b through which the shaft portion of the fastening member 93 penetrates. The screw hole portions 922A and 922B are hole portions provided with nut portions.

[0061] The connecting portion 923 is, for example, a plate portion parallel to the XY plane, and is opposed in the X-axis direction with a predetermined gap between the first arm portion 921 and the second arm portion 922. As a result, at least a part of the first arm portion 921 and the second arm portion 922 can be overlapped, so that the degree of freedom in the position where the screw hole portion 922a is provided is increased, and the rotation radius of the LED substrate around the rotation axis P1 can be arbitrarily set.

[0062] The fastening member 93 is screwed into the screw hole portion 922b of the movable plate portion 92 through the long hole portion 91a of the fixed plate portion 91. When the fastening member 93 is tightened to the screw hole portion 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, and the rotation of the movable plate portion 92 is blocked. On the other hand, when the tightening action by the fastening member 93 is released, the movable plate portion 92 can be rotated to an arbitrary angular position over the formation range of the long hole portion 91a with respect to the fixed plate portion 91.

[0063] The rotation mechanism portion 90B on the other side is also configured as described above. Thereby, the optical unit 20A is configured to be rotatable around the rotation P1 inside the casing 110. In the present embodiment, since the LED substrate 22 and the mirror portion 212 are commonly provided on the base member 21, the LED substrate 22 and the mirror portion 212 rotate integrally by the rotation mechanism 90.

[0064] As described above, according to the present 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.

[0065] For example, conventionally, in this type of low-position lighting device, since the optimal light distribution varies according to the shoulder width (or roadside strip width) and the lane width, it was necessary to prepare a plurality of types of lighting devices with different light distributions so as to be able to cope with the shoulder width and the like. On the other hand, according to the present embodiment, since the reflecting mirror 213 is configured to be rotatable, the present invention is applicable to a lighting fixture having two functions for a narrow shoulder width and a wide shoulder width with a single lighting device 100.

[0066] Further, by arbitrarily setting the rotation angle range of the optical unit 20A, it can be used as a lighting fixture for illuminating a far region more than 10 meters ahead, or as a lighting fixture for illuminating a nearby region several meters ahead. For example, FIG. 13(A) shows the illuminance distribution of the illumination light when the reflecting mirror portion 213 is rotated to the maximum angle position, and FIG. 13(B) shows the illuminance distribution when the reflecting mirror portion 213 is rotated to the minimum angle position (the position -20 degrees from the above maximum angle position).

[0067] Furthermore, according to the present embodiment, since the support plate portion 211 and the reflecting mirror portion 212 of the base member 21 are integrally formed, respectively, compared with the case where these optical elements are separately fixed to the casing 110, the light emitting element 222 (LED substrate 22) mounted on the support plate portion 211 and the reflecting mirror portion 212 Stable relative positioning between optical elements such as is possible. Thereby, it is possible to suppress the occurrence of variations in the relative positions due to individual differences and assembly tolerances of the respective optical elements, and it is possible to eliminate the need for fine adjustment of the positions between the respective optical elements.

[0068] Also, according to the present embodiment, since the LED substrate 22, the reflecting mirror portion 212, and the light shielding plate portion 213 can be integrated by a single optical unit 20, the installation in the casing 110 can be simplified. As a result, the assembly workability is further improved, and the productivity and the working cost can be improved.

[0069] Furthermore, since a plurality of fasteners F1 for fixing the optical unit 20 engage with the guide groove G1 formed in the rear wall portion S3 of the casing 110, the position of the optical unit 20 with respect to the casing 110 can be arbitrarily adjusted in a uniaxial direction by sliding the fastener F1 with respect to the guide groove G1. Similarly, the terminal block 31 and the power supply unit 32 can be adjusted to arbitrary positions along the guide grooves G1 to G3.

[0070] 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 various modifications can be made, of course.

[0071] For example, in the above embodiments, the lighting device 100 is configured as a low-position lighting device for a lane of a highway or the like. However, the present invention is not limited thereto, and the present invention is also applicable to lighting devices for advertisements, exhibits, and the like.

[0072] Also, in the above embodiments, a configuration example in which the LED substrate 22 (light source module) and the reflecting mirror portion 213 are integrally rotated as the rotation mechanism 90 has been described. However, the present invention is not limited thereto, and only one of the LED substrate 22 (light source module) and the reflecting mirror portion 213 may be configured to be rotatable. By this also, the light distribution of the illumination light reflected by the reflecting mirror portion 213 can be made different.

[0073] Also, the number of the optical units 20 (20A) is not limited to one, and a plurality may be provided. For example, by arranging two optical units 20A having different rotation angles in the longitudinal direction (X-axis direction) or the height direction (Z-axis direction) of the casing 110, combined light of the illumination light of two optical units having different light distribution characteristics can be irradiated.

[0074] Furthermore, in the above embodiments, a plurality of light-emitting elements 222 are mounted as the light source module and an LED substrate is used, but the present invention is not limited thereto. For example, a lens array having a lens portion for distributing the emitted light of each light-emitting element 222 in a predetermined direction may be used. In this case, a lens array that emits the emitted light from each light-emitting element 222 in an oblique direction (the width direction of the casing 110) with a higher light distribution intensity than the optical axis direction can be adopted. Thereby, it is possible to increase the installation interval of the lighting devices installed on the road.

Explanation of Signs

[0075] 10…Device main body 20, 20A…Optical unit 21…Base member 22…LED substrate 90…Rotation mechanism 91…Fixed plate portion 92…Movable plate portion 93…Fastening member 100…Lighting device 110…Casing 120…Window member 211…Support plate portion 211a…Support surface 212…Mirror portion 213…Light shielding plate portion 222…Light-emitting element P1…Rotation axis

Claims

1. A casing, a window member attached to the casing, a light source module having a plurality of light emitting elements arranged along a uniaxial direction inside the casing and having optical axes in a direction orthogonal to the uniaxial direction, and a reflecting mirror portion that reflects the emitted light from the plurality of light emitting elements toward the window member, and an optical unit having the reflecting mirror portion; a rotation mechanism configured to be able to rotate at least one of the light source module and the reflecting mirror portion around the uniaxial direction A lighting device comprising the rotation mechanism.

2. The lighting device according to claim 1, wherein the rotation mechanism is configured to be able to integrally rotate the light source module and the reflecting mirror portion around the uniaxial direction A lighting device.

3. The lighting device according to claim 2, wherein the optical unit further has a support plate portion formed integrally with the reflecting mirror portion and supporting the light source module A lighting device.

4. The lighting device according to claim 3, wherein the casing has a rear wall portion facing the window member, and the rotation mechanism includes a fixing plate portion fixed to the rear wall portion, a rotation shaft passing through the fixing plate portion and parallel to the uniaxial direction, a movable plate portion attached to the optical unit and capable of rotating the optical unit around the rotation shaft, and a fastening member attached to the fixing plate portion and capable of fastening the movable plate portion to the fixing plate portion A lighting device.

5. The lighting device according to claim 1, wherein the reflecting mirror portion has a reflecting surface having a curved surface shape with a uniform cross-sectional shape perpendicular to the uniaxial direction A lighting device.

6. The lighting device according to any one of claims 1 to 5, wherein the casing is installed with the uniaxial direction facing a direction parallel to the installation surface A lighting device.

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