Lighting fixture

Abstract

To provide a lighting fixture capable of further rotating a light source unit in the downward direction.SOLUTION: A lighting fixture A1 includes a light source unit 1, and an arm 2 for supporting the light source unit 1. The arm 2 includes a pair of holding parts 21, a fixing part 22, and a pair of bent parts 23. The pair of holding parts 21 rotatably holds the light source unit 1 with the left-to-right direction of the light source unit 1 being an axis. The fixing part 22 fixes the arm 2. The pair of bent parts 23 is provided in a portion between the pair of holding parts 21 and the fixing part 22, and is a portion where the arm 2 bends in a side surface view of the light source unit 1.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates generally to a lighting fixture, and more particularly to a lighting fixture including a light source unit. [Background technology]

[0002] As a conventional example, the lighting fixture described in Patent Document 1 is exemplified. The lighting fixture described in Patent Document 1 includes a light-projecting unit and an arm that supports the light-projecting unit. The arm includes left and right arm portions that extend vertically on the left and right of the light-projecting unit, and a bottom frame portion that bridges the lower ends of the arm portions. The left and right arm portions are disposed extending obliquely and linearly from the left and right of the bottom frame portion toward the upper front. The left and right arm portions rotatably hold the light-projecting unit. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-27698 A Summary of the Invention [Problem to be solved by the invention]

[0004] In a conventional lighting fixture, for example, when the light-projecting unit is rotated downward, the light-projecting unit may come into contact with the left and right linearly extending arms, making it difficult to rotate the light-projecting unit further downward in the conventional lighting fixture.

[0005] An object of the present disclosure is to provide a lighting fixture in which the light source unit can be further rotated downward. [Means for solving the problem]

[0006] A lighting device according to one aspect of the present disclosure includes a light source unit and an arm supporting the light source unit. The arm has a pair of holding portions, a fixing portion, and a bending portion. The pair of holding portions hold the light source unit rotatably about an axis in the left-right direction of the light source unit. The fixing portion fixes the arm. The bending portion is provided in a portion between the pair of holding portions and the fixing portion, and is a portion where the arm is bent in a side view of the light source unit. Effect of the Invention

[0007] According to the lighting device according to one aspect of the present disclosure, it is possible to further rotate the light source unit downward. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a lighting fixture according to an embodiment. [Diagram 2] FIG. 2 is an exploded perspective view of the above lighting fixture. [Diagram 3] FIG. 3 is a right side view of the above lighting fixture. [Figure 4] FIG. 4 is a rear view of the above lighting fixture. [Diagram 5] FIG. 5 is an exploded perspective view of a light source unit in the lighting fixture. [Figure 6] FIG. 6 is a vertical sectional view of the light source unit of the above embodiment. [Figure 7] FIG. 7 is a development view of an arm in the lighting fixture. [Figure 8] Fig. 8A is an explanatory diagram showing a state before the light source unit is rotated downward, and Fig. 8B is an explanatory diagram showing a state after the light source unit is rotated downward. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] The lighting fixture according to the embodiment will be described below with reference to the drawings. The figures described in the following embodiments are schematic diagrams, and the ratios of the sizes and thicknesses of the components do not necessarily reflect the actual dimensional ratios. Furthermore, the configurations described in the following embodiments are merely examples of the present disclosure. The present disclosure is not limited to the following embodiments, and various modifications are possible depending on the design, etc., as long as the effects of the present disclosure can be achieved.

[0010] (Embodiment) (1) Overview First, an overview of a lighting device A1 according to an embodiment will be described with reference to FIGS. 1 to 8. FIG.

[0011] As shown in Figs. 1 to 8, a lighting device A1 according to the embodiment includes a light source unit 1 and an arm 2. The arm 2 supports the light source unit 1. The arm 2 has a pair of holding portions 21, a fixed portion 22, and a pair of bending portions 23. The pair of holding portions 21 hold the light source unit 1 rotatably about an axis in the left-right direction of the light source unit 1. The fixed portion 22 fixes the arm 2. The pair of bending portions 23 are provided in a portion between the pair of holding portions 21 and the fixed portion 22, and are portions where the arm 2 is bent in a side view of the light source unit 1.

[0012] In the lighting device A1 according to the embodiment, the bent portion 23 is provided on the arm 2, so that when the light source unit 1 is rotated so that the light emission surface 103 of the light source unit 1 faces downward, it is possible to prevent the edge of the light source unit 1 from coming into contact with the arm 2. This makes it possible to further rotate the light source unit 1 downward in the lighting device A1 according to the embodiment.

[0013] (2)Details The lighting fixture A1 according to the embodiment is a floodlight used mainly for illuminating (floodlighting) soccer stadiums, various athletic fields, school playgrounds, etc. In the following description, unless otherwise specified, the first direction D1, second direction D2, and third direction D3 indicated by arrows in FIG. 1 are defined as the front-rear direction, left-right direction, and up-down direction of the lighting fixture A1. However, these directions are not intended to limit the directions of the lighting fixture A1 when it is in use. Also, the arrows indicating "D1", "D2", and "D3" in the drawings are merely indicated for the purpose of explanation, and none of them have any substance.

[0014] 1 to 8, the lighting fixture A1 includes a light source unit 1 and an arm 2 that supports the light source unit 1. The lighting fixture A1 also includes a power supply unit 3 that supplies power for lighting the light source unit 1, a display member 5 having a plurality of first scales 51 and a plurality of second scales 52, and a pair of fixing bases 6 that fix the power supply unit 3 to the light source unit 1.

[0015] (2.1) Light source unit 5, the light source unit 1 has a light-emitting section 102 and a box-shaped housing 4 that houses the light-emitting section 102. In this embodiment, the light-emitting section 102 has a light source module 10 and a cover 11. In addition, in this embodiment, the housing 4 has a heat dissipation block 12, a frame 13, and a sealing member 14. In short, the light source unit 1 has the light source module 10, the cover 11, the heat dissipation block 12, the frame 13, and the sealing member 14.

[0016] (2.1.1) Light source module As shown in Figs. 5 and 6, the light source module 10 is an LED module in which a plurality of light emitting elements 100 are mounted on the front surface of a flat substrate 101. That is, a plurality of light emitting elements 100 are mounted on the substrate 101. The plurality of light emitting elements 100 are mounted on the front surface of the substrate 101 so as to be aligned vertically and horizontally (up and down, left and right) at intervals. Each light emitting element 100 is, for example, a packaged white LED for lighting. Note that the light emitting element 100 is not limited to an LED, and may be an organic electroluminescence element, a semiconductor laser element, or the like. The substrate 101 is, for example, a metal base substrate based on an aluminum plate.

[0017] (2.1.2) Cover 5 and 6, the cover 11 has a cover body 110, a plurality of lens portions 111, and a peripheral portion 112. The cover body 110, the plurality of lens portions 111, and the peripheral portion 112 are integrally formed from a synthetic resin having translucency, such as an acrylic resin or a polycarbonate resin.

[0018] The cover body 110 has a front plate 1100 formed in a rectangular flat plate shape, and a side plate 1101 rising rearward from the periphery of the front plate 1100. A plurality of lens portions 111 are provided on the rear surface of the front plate 1100 (see FIG. 6). A boss 1102 is provided in the center of the front plate 1100 (see FIG. 6). The boss 1102 protrudes rearward from the rear surface of the front plate 1100 and is formed in a truncated cone shape. A screw insertion hole 1103 is formed in the bottom of the boss 1102.

[0019] A peripheral portion 112 is provided at the rear end of the side plate portion 1101. The peripheral portion 112 protrudes outward from the rear end of the side plate portion 1101 around the entire periphery (see FIGS. 5 and 6).

[0020] Each of the lens portions 111 protrudes rearward from the rear surface of the front plate portion 1100 and is formed in a truncated cone shape (see FIG. 6). Each lens portion 111 is disposed at a position corresponding one-to-one to a corresponding one of the light emitting elements 100 in the light source module 10.

[0021] The cover 11 has a plurality of recesses 113 (see FIG. 5). The plurality of recesses 113 are provided at the upper end, lower end, left end, and right end of the cover 11 across the cover body 110 and the peripheral portion 112.

[0022] (2.1.3) Heat dissipation block The heat dissipation block 12 has a base member 120 and a plurality of heat dissipation members 121 (see FIG. 5). The base member 120 is formed, for example, in a rectangular flat plate shape by an aluminum alloy. The base member 120 has a first surface 1201 and a second surface 1202 as shown in FIG. 6. The first surface 1201 is, for example, the front surface of the base member 120. The second surface 1202 is the surface on the opposite side of the first surface 1201. That is, the second surface 1202 is the rear surface of the base member 120.

[0023] The substrate 101 of the light source module 10 is attached to the first surface 1201 of the base member 120 using a plurality of screws 122 (see FIG. 6). Thereby, the substrate 101 of the light source module 10 and the base member 120 are mechanically and thermally connected.

[0024] Further, as shown in FIGS. 4 and 6, a plurality (two in the illustrated example) of convex portions 18 are provided on the second surface 1202 of the base member 120. The plurality of convex portions 18 are arranged at intervals in the third direction (vertical direction) D3. Each convex portion 18 is provided over the entire length of the base member 120 in the second direction (left - right direction) D2. Each convex portion 18 protrudes rearward from the second surface 1202 of the base member 120 along the first direction (front - rear direction) D1 which is the normal direction of the base member 120.

[0025] In addition, at the four corners of the second surface 1202 of the base member 120, prismatic protrusions 1203 are provided (see FIGS. 5 and 6). Two screw holes 1206 are provided on the outer surfaces in the left - right direction of the four protrusions 1203.

[0026] Each of the heat dissipation members 121 is formed of, for example, an aluminum alloy. As shown in FIG. 4, each of the heat dissipation members 121 has a pair of heat dissipation plates 191 and a connecting plate 192 that connects the pair of heat dissipation plates 191. Each of the heat dissipation members 121 is formed in a U-shape in a plan view from the third direction D3 by the pair of heat dissipation plates 191 and the connecting plate 192. Each of the pair of heat dissipation plates 191 is a rectangular plate that is longer in the third direction D3 than in the first direction D1. In addition, each of the heat dissipation plates 191 has two corners located at the rear that are chamfered. In addition, each of the heat dissipation plates 191 has a plurality of grooves 193 (two in the illustrated example) (see FIG. 6). The plurality of grooves 193 penetrate the heat dissipation plate 191 in the thickness direction (left-right direction). In addition, the plurality of grooves 193 are provided at intervals in the third direction D3. More specifically, the multiple grooves 193 are provided at positions that correspond one-to-one to the multiple protrusions 18 of the base member 120. Each groove 193 has a size that allows the corresponding protrusion 18 to be inserted therein.

[0027] As shown in Fig. 4, the connecting plate 192 is a rectangular plate that is longer in the third direction D3 than in the second direction D2. The connecting plate 192 has a plurality of crimping holes 194. The plurality of crimping holes 194 penetrate the connecting plate 192 in the thickness direction (front-rear direction). The plurality of crimping holes 194 are provided at intervals along the third direction D3. More specifically, the plurality of crimping holes 194 are provided at positions that correspond one-to-one to a plurality of protrusions 1208 (see Fig. 4) provided on the second surface (rear surface) 1202 of the base member 120.

[0028] 6, the connecting plate 192 has a plurality of (four in the illustrated example) hook portions 195. The hook portions 195 are arranged in pairs, and the two hook portions 195 in each pair protrude in directions opposite to each other. That is, the heat dissipation member 121 has the hook portions 195 that can be hooked onto the protrusions 18.

[0029] 4, the multiple heat dissipation members 121 are attached to the second surface 1202 of the base member 120 at regular intervals. The heat dissipation block 12 dissipates heat generated by the multiple light emitting elements 100 during lighting, thereby suppressing a temperature rise in the light source module 10 and improving the light emission efficiency.

[0030] (2.1.4) Frame 5, the frame 13 has a peripheral wall 131 formed in a rectangular cylindrical shape, a flange portion 132 protruding inward over the entire circumference from the inner peripheral surface of the peripheral wall 131, a plurality of fixing portions 133 provided on the flange portion 132, and a protruding wall 135 provided on the front surface of the peripheral wall 131. The peripheral wall 131, the flange portion 132, the plurality of fixing portions 133, and the protruding wall 135 are integrally formed by, for example, aluminum die casting. Furthermore, through holes 136 are provided at the four corners of the flange portion 132.

[0031] The fixing portions 133 are provided at positions facing the recesses 113 of the cover 11 in the front-rear direction. Each fixing portion 133 is formed in a trapezoidal shape. Each fixing portion 133 is provided with a through hole 134 penetrating therethrough in the front-rear direction.

[0032] The projecting wall 135 projects forward from the front surface of the peripheral wall 131 excluding the four corners (see FIGS. 5 and 6). The outer peripheral surface of the projecting wall 135 and the outer peripheral surface of the peripheral wall 131 are flush with each other.

[0033] (2.1.5) Sealing material 5, the seal member 14 has a main body 140 formed in a rectangular tubular shape, a plurality of protrusions 142 provided on the outer circumferential surface of the main body 140, and a plurality of fixing pieces 143 provided on the inner circumferential surface of the main body 140. The main body 140, the plurality of protrusions 142, and the plurality of fixing pieces 143 are integrally formed of, for example, silicone rubber. Note that the seal member 14 may be formed of an elastic material other than silicone rubber.

[0034] The four corners of the main body 140 are chamfered. An inwardly opening groove 141 is formed around the entire circumference on the inner peripheral surface of the main body 140 (see Figs. 5 and 6). In addition, ribs are provided around the entire circumference on the front and rear surfaces of the main body 140 and on the inner surfaces in front and rear of the groove 141.

[0035] The fixing pieces 143 are provided at positions facing the recesses 113 of the cover 11 in the front-rear direction. Each fixing piece 143 is formed in a trapezoidal shape. Each fixing piece 143 is provided with a through hole 144 penetrating in the front-rear direction.

[0036] The multiple protrusions 142 are formed in a triangular prism shape.

[0037] (2.1.6) Heat Dissipation Block Assembly Procedure The following describes the procedure for assembling the heat dissipation block 12. Note that the assembly procedure described below is an example, and the order of some steps may be changed.

[0038] First, a worker performing assembly work attaches a plurality of heat dissipation members 121 to the base member 120. Here, in this embodiment, as described above, a pair of hook portions 195 correspond to each of the protrusions 18. Therefore, each heat dissipation member 121 cannot be attached to the base member 120 from the rear, and each heat dissipation member 121 is attached to the base member 120 by sliding each heat dissipation member 121 from the left and right directions relative to the base member 120.

[0039] Next, the worker inserts the corresponding protrusions 1208 of the base member 120 into the corresponding crimping holes 194 of each heat dissipation member 121, and then plastically deforms the protrusions 1208. This causes each heat dissipation member 121 to be crimped and fixed to the base member 120. When each heat dissipation member 121 is crimped and fixed to the base member 120, the protrusion 18 is disposed within the space surrounded by the groove 193 and the two hook portions 195, as shown in Fig. 6. When all the heat dissipation members 121 are attached to the base member 120, the assembly of the heat dissipation block 12 is completed.

[0040] (2.1.7) Light source unit assembly procedure The assembly procedure of the light source unit 1 will be described with reference to Figures 5 and 6. Note that the assembly procedure described below is an example, and the order of some steps may be changed.

[0041] First, an assembly worker attaches the light source module 10 to the first surface 1201 of the base member 120 of the heat dissipation block 12. The light source module 10 is fixed to the base member 120 with a plurality of screws 122 (see FIG. 5 ). That is, the base member 120 supports the light source module 10 including the substrate 101.

[0042] Next, the worker places the seal member 14 on the outside of the cover 11 and inserts the peripheral portion 112 of the cover 11 into the groove 141 of the body 140 of the seal member 14, thereby attaching the seal member 14 to the cover 11 (see FIG. 6). At this time, the multiple recesses 113 of the cover 11 and the multiple fixing pieces 143 of the seal member 14 overlap one-to-one.

[0043] Then, the worker places the frame body 13 over the cover 11 with the sealing member 14 attached from the front, and places the cover 11, the sealing member 14 and the frame body 13 on the first surface 1201 of the base member 120 so that the multiple fixing portions 133 of the frame body 13 overlap the multiple fixing pieces 143 of the sealing member 14 in the front-to-back direction.

[0044] Next, the worker inserts shoulder screw 16 with a washer (see FIG. 5) into screw insertion hole 1103 in the bottom surface of boss 1102 provided in the center of cover body 110. The male thread of shoulder screw 16 passes through a through hole penetrating the center of substrate 101 and is screwed into screw hole 1205 provided in the center of base member 120 (see FIG. 6). An O-ring 17 is disposed between the bottom surface of boss 1102 in cover 11 and the washer of shoulder screw 16 (see FIG. 6).

[0045] Finally, the worker inserts screws 15 (see FIG. 5) from through holes 134 of each fixing portion 133 of frame body 13 into through holes 144 of each fixing piece 143 of seal member 14, and screws 15 one by one into a plurality of screw holes 1204 (see FIG. 5) provided in base member 120. As a result, in lighting device A1, cover 11 and seal member 14 are sandwiched between frame body 13 and base member 120, and thereby cover 11 and seal member 14 are attached to base member 120 (see FIG. 6).

[0046] With the above steps, assembly of the light source unit 1 is completed.

[0047] Incidentally, the optical axis L1 of the light source module 10 is inclined upward from the normal line H1 of the first surface 1201 of the base member 120 of the heat dissipation block 12, as shown in FIG. 8A. More specifically, the lens units 111 are configured so that light from the corresponding light emitting elements 100 is emitted upward from the normal line H1. In other words, the lens units 111 are configured so that light from the corresponding light emitting elements 100 is emitted along the optical axis L1 of the light source module 10. In this embodiment, the angle θ1 between the optical axis L1 of the light source module 10 and the normal line H1 of the first surface 1201 of the base member 120 is 10 degrees, but this angle is not particularly limited. The normal line H1 of the first surface 1201 of the base member 120 of the heat dissipation block 12 coincides with the normal line of the light emission surface 103 of the light source unit 1 described above.

[0048] (2.2) Power supply unit As shown in FIG. 1, the power supply unit 3 includes a power supply device (not shown) and a power supply case 30 that houses the power supply device.

[0049] The power supply device converts AC power supplied from a commercial power source (not shown) into DC power, and operates to make the current value of the DC current supplied to the light source module 10 of the light source unit 1 coincide with a target value (for example, a rated current value of the light source module 10). The power supply device may have a function (dimming function) of adjusting the target value of the DC current supplied to the light source module 10 to a value lower than the rated current value.

[0050] The power supply case 30 has a case body 31 in the shape of a box with one side (the rear side) open, and a case lid 32 that closes the opening surface of the case body 31. Both the case body 31 and the case lid 32 are formed of an aluminum alloy.

[0051] On both the left and right side surfaces of the case body 31, one mounting portion 33 is provided respectively (see FIGS. 2 and 4). Each mounting portion 33 is formed in a columnar shape and is integrally formed with the case body 31 so as to protrude in the left - right direction from approximately the center in the up - down direction on both the left and right side surfaces of the case body 31.

[0052] At the center of the bottom surface of each mounting portion 33, a screw hole 330 is provided (see FIG. 2). Also, on the bottom surface of one (right - hand side) mounting portion 33, around the screw hole 330, three protrusions 331 are provided. The three protrusions 331 are all formed in a columnar shape and are arranged at equal intervals on a concentric circle centered on the screw hole 330. Also, on the bottom surface of the right - hand side mounting portion 33, a female screw portion 334 is provided between two of the protrusions 331.

[0053] On the lower surface of the power supply case 30, two power supply lines P1, P2 are led out (see FIG. 3). The two power supply lines P1, P2 are electrically connected to a power supply device. One power supply line P1 is electrically connected to the light source unit 1 and transmits the direct - current power output from the power supply device to the light source unit 1. The other power supply line P2 is electrically connected to a commercial power supply and transmits the alternating - current power output from the commercial power supply to the power supply device.

[0054] The case lid 32 is formed in a rectangular flat plate shape. The case lid 32 overlaps the rear end surface of the case body 31 to cover the opening surface of the case body 31 and is screwed to the case body 31 with a plurality of screws 321 (see FIG. 4). A sealing member is disposed in the gap between the opening surface of the case body 31 and the case lid 32.

[0055] The power supply unit 3 is fixed to the light source unit 1 by a pair of fixing bases 6 (see FIG. 1). Each fixing base 6 has a fixing plate 60 and a pair of side plates 61. The fixing plate 60 is formed in a substantially rectangular flat plate shape (see FIG. 3). The fixing plate 60 is provided with a plurality of (four in the illustrated example) ventilation holes 600. The fixing plate 60 is mechanically connected to the power supply unit 3 by fastening the rear end of the fixing plate 60 to the case body 31 with a plurality of (four in the illustrated example) screws 601.

[0056] The pair of side plates 61 are formed integrally with the fixed plate 60 so as to protrude in the left-right direction from the upper and lower edges of the fixed plate 60, respectively. As shown in Fig. 3, each side plate 61 is mechanically connected to the light source unit 1 by fastening its front end to the base member 120 of the heat dissipation block 12 with a plurality of screws 602 (three in the illustrated example). In this manner, the power supply unit 3 is fixed to the light source unit 1 (the heat dissipation block 12) by the pair of fixing bases 6.

[0057] (2.3) Display member As shown in Fig. 2, the display member 5 is formed into a disk shape from a metal plate. A cylindrical recess 53 is provided in the center of the display member 5. The recess 53 is recessed from the front surface (display surface 50) of the display member 5 toward the back surface. A circular insertion hole 530 penetrates the center of the bottom surface of the recess 53. Three positioning holes 531 are also formed around the insertion hole 530 in the bottom surface of the recess 53, and are spaced at equal intervals. Furthermore, a circular mounting hole 532 penetrates between the two positioning holes 531 in the bottom surface of the recess 53.

[0058] A plurality of first scales 51 and a plurality of second scales 52 are marked on the display surface 50 of the display member 5. The plurality of first scales 51 and the plurality of second scales 52 are represented by line segments along the radial direction of the display surface 50, and are, for example, engraved on the display surface 50. The display member 5 may print the plurality of first scales 51 and the plurality of second scales 52 on the display surface 50. Alternatively, the display member 5 may be a sticker on which the plurality of first scales 51 and the plurality of second scales 52 are printed, which is attached to the display surface 50.

[0059] In addition, two stoppers 54 are provided at the peripheral portion of the display member 5 (see FIG. 2). Each stopper 54 is cut and raised so as to protrude from the display surface 50 of the display member 5 toward the back surface. When the light source unit 1 rotates upward or downward, each stopper 54 hits the fixing bracket 261 of the lock mechanism 26 described later, thereby restricting the rotation angle of the light source unit 1.

[0060] (2.4) Arm As shown in FIGS. 2 and 7, the arm 2 has a pair of holding portions 21, a fixing portion 22, a pair of arm portions 27, and an indicating portion 25. The arm 2 is integrally formed with a pair of holding portions 21, a fixing portion 22, a pair of arm portions 27, and an indicating portion 25 by processing a metal plate.

[0061] The pair of holding portions 21 are configured to hold the light source unit 1. Each of the pair of holding portions 21 is formed in a substantially rectangular flat plate shape. The tip of each holding portion 21 is semi-circular, and a round hole 210 penetrates therethrough at the center. Each round hole 210 is formed so that a mounting screw 333 inserted through a cylindrical spacer 332 can be inserted therethrough (see FIG. 3). The indicating portion 25 is provided on one (right side) holding portion 21.

[0062] The fixing part 22 is configured to fix the arm 2 to a base Z1 (see FIG. 1), which is a fixed surface. As shown in FIG. 7, the fixing part 22 has a first insertion hole 221, a second insertion hole 222, a plurality of third scales 223, and a plurality of fourth scales 224. The first insertion hole 221 is a circular hole that penetrates the fixing part 22 in the thickness direction (up and down direction) almost at the center of the fixing part 22. The second insertion hole 222 is a semicircular arc-shaped long hole that penetrates the fixing part 22 in the thickness direction with the first insertion hole 221 as the center. The second insertion hole 222 is located behind the first insertion hole 221 except for both ends. The fixing part 22 is fixed to the base Z1 using a bolt inserted into the first insertion hole 221 and a bolt inserted into the second insertion hole 222. Furthermore, the fixing portion 22 is rotatable about the bolts inserted through the first insertion holes 221 as a fulcrum (axis of rotation) when the nuts tightening the bolts are loosened.

[0063] A plurality of third scales 223 and a plurality of fourth scales 224 are marked on a display surface (upper surface in FIG. 7 ) 220 of the fixed part 22. The plurality of third scales 223 and the plurality of fourth scales 224 are represented by line segments along the rotation direction of the fixed part 22 (the circumferential direction of the first insertion hole 221), and are engraved on the display surface 220, for example. The fixed part 22 may print the plurality of third scales 223 and the plurality of fourth scales 224 on the display surface 220. Alternatively, the fixed part 22 may attach a sticker on which the plurality of third scales 223 and the plurality of fourth scales 224 are printed to the display surface 220.

[0064] The pair of arms 27 rise obliquely upward and forward from both the left and right ends of the fixed portion 22 (see FIG. 3). A pair of holding portions 21 are integrally provided at the tips of the pair of arms 27. More specifically, one (right) holding portion 21 is integrally provided at the tip of one (right) arm 27, and the other (left) holding portion 21 is integrally provided at the tip of the other (left) arm 27. Furthermore, the pair of arms 27 have a pair of wide portions 24 and a pair of bent portions 23, as shown in FIG. 3.

[0065] The pair of wide portions 24 rise obliquely upward and forward from both the left and right ends of the fixed portion 22 (see FIG. 3). Each of the pair of wide portions 24 is formed in a flat plate shape. Each of the pair of wide portions 24 is tapered so that both the front and rear ends protrude in a side view of the light source unit 1. More specifically, each of the pair of wide portions 24 is configured so that both the front and rear ends gradually increase in width as they move toward the fixed portion 22 side in a side view of the light source unit 1. In this embodiment, the width of each wide portion 24 is larger than the width of the tip of each holding portion 21. Also, the width of each wide portion 24 is larger than the width of each bending portion 23 described later. In other words, the pair of wide portions 24 is wider than the pair of holding portions 21 and the pair of bending portions 23. Also, the pair of wide portions 24 are configured so that the tips of the pair of wide portions 24 gradually move apart as they move away from the fixed portion 22 (see FIG. 1).

[0066] The pair of bent portions 23 are connected to the pair of wide portions 24. More specifically, the pair of bent portions 23 is such that one (right) bent portion 23 is integrally provided at the tip of one (right) wide portion 24, and the other (left) bent portion 23 is integrally provided at the tip of the other (left) wide portion 24. Each of the pair of bent portions 23 is formed in a flat plate shape. The pair of bent portions 23 is a portion where the arm 2 is bent in a side view of the light source unit 1. More specifically, each of the bent portions 23 is bent so that the length of the front end edge is shorter than the length of the rear end edge in a side view of the light source unit 1. In addition, the pair of bent portions 23 is configured to avoid contact with the edges of the light source unit 1 when the light source unit 1 is rotated so that the light emission surface 103 of the light source unit 1 faces downward (see FIG. 8B). In addition, the pair of bent portions 23 is provided at the portion where the width of the arm 2 is narrowest. In this embodiment, the width dimension of the pair of bent portions 23 is smaller than the width dimension of the tip ends of the pair of holding portions 21.

[0067] The pair of holding portions 21 are connected to the pair of bent portions 23. More specifically, the pair of holding portions 21 is such that one (right) holding portion 21 is integrally provided at the tip of one (right) bent portion 23, and the other (left) holding portion 21 is integrally provided at the tip of the other (left) bent portion 23.

[0068] The indicator 25 is formed in a substantially trapezoidal shape when viewed from above in the left-right direction, and protrudes rearward from the rear edge below the right-side holding portion 21 (see FIG. 3). The upper edge of the indicator 25 overlaps with the display surface 50 of the display member 5 (see FIG. 3). In other words, the indicator 25 can indicate the angle at which the light source unit 1 has rotated relative to the arm 2 by the scales (first scale 51 and second scale 52) of the display member 5 that overlap with the upper edge of the indicator 25. The indicator 25 has a mark 250 printed on its surface to clearly indicate the upper edge that should be aligned with the scales (first scale 51 and second scale 52) of the display member 5 (see FIG. 3).

[0069] Incidentally, the lighting device A1 is provided with a locking mechanism 26 for locking the rotation of the display member 5. As shown in Fig. 4, the locking mechanism 26 has a handle 260 and a fixing bracket 261. The handle 260 is formed by bending a metal rod into an L-shape. A male screw 262 is integrally formed at the tip of the handle 260.

[0070] The fixing bracket 261 is formed in a square gutter shape from a metal plate. The fixing bracket 261 has a through hole at one end in the longitudinal direction of the bottom surface through which the tip of the handle 260 is inserted, and has a protrusion 2611 for preventing rotation at the other end in the longitudinal direction.

[0071] The locking mechanism 26 accommodates a nut (not shown) inside the fixing bracket 261, and after inserting and hooking a protrusion 2611 of the fixing bracket 261 into a hole 251 (see FIG. 7) provided in the indication portion 25, the male screw 262 of the handle 260 is inserted into the through hole of the fixing bracket 261 through the hole 252 provided in the indication portion 25. The locking mechanism 26 is then attached to the indication portion 25 (arm 2) by tightening a nut onto the male screw 262 protruding inwardly of the fixing bracket 261. The nut is prevented from rotating by abutting against the inner surface of the fixing bracket 261. The display member 5 is inserted into the gap between the fixing bracket 261 and the indication portion 25 (see FIG. 4).

[0072] In this way, when the handle 260 rotates clockwise (right), the locking mechanism 26 stops the nut and the fixing bracket 261 from rotating, so that the fixing bracket 261 moves in a direction approaching the indicator 25, and the display member 5 is sandwiched and fixed between the fixing bracket 261 and the indicator 25. This allows the locking mechanism 26 to lock the rotation of the display member 5, i.e., the rotation of the light source unit 1 and the power supply case 30. On the other hand, when the handle 260 rotates counterclockwise (left), the locking mechanism 26 moves the fixing bracket 261 in a direction away from the indicator 25, so that the display member 5 can rotate and the light source unit 1 and the power supply unit 3 can rotate.

[0073] (2.5) Lighting fixture assembly procedure The assembly procedure for the lighting device A1 will be described below. Note that the assembly procedure described below is one example, and the order of some steps may be changed.

[0074] First, an assembly worker attaches the power supply unit 3 to the rear surface (back face) of the light source unit 1 using a pair of fixing bases 6.

[0075] Next, the worker inserts the three protrusions 331 provided on one (right) mounting part 33 one by one into the three positioning holes 531 penetrating the bottom surface of the recess 53 of the display member 5, thereby positioning the display member 5 on the mounting part 33. Next, the worker attaches the display member 5 to the mounting part 33 of the power supply case 30 by screwing the screw 55 (see FIG. 2) inserted through the mounting hole 532 of the display member 5 into the female threaded part 334 of the mounting part 33.

[0076] Then, the worker inserts the mounting screw 333, which has been inserted through a cylindrical spacer 332 (see FIG. 2), into the round hole 210 of one (right) holding part 21 of the arm 2, and screws it into the screw hole 330 provided in the mounting part 33 of the power supply case 30. In this way, the arm 2 can rotatably support the light source unit 1 via the power supply case 30 and the pair of fixed bases 6 by sandwiching the spacer 332 between the head of the mounting screw 333 and the bottom surface of the mounting part 33. In short, the pair of holding parts 21 can hold the light source unit 1 rotatably around the left-right direction of the light source unit 1 as an axis.

[0077] With the above steps, assembly of the lighting fixture A1 is completed.

[0078] (2.6) Installation of lighting fixtures The installation procedure for lighting fixture A1 will be described below. Note that the installation procedure described below is just an example, and the order of some steps may be changed.

[0079] The lighting fixture A1 is attached to a stand Z1 that is installed, for example, at the tip of a concrete pillar. The lighting fixture A1 is fixed to the stand Z1 by fastening the fixing part 22 of the arm 2 to the stand Z1 with a screw (see FIG. 1). Note that in FIG. 1, the screw for fixing the fixing part 22 to the stand Z1 is omitted from the illustration.

[0080] As shown in FIG. 1, the lighting fixture A1 has a wire 70 and a fall prevention metal fitting 71 for preventing the lighting fixture A1 from falling. The fall prevention metal fitting 71 is screwed to the stand Z1. The wire 70 is inserted through a ring 72 (see FIG. 4) of the fall prevention metal fitting 71. Both ends of the wire 70 are inserted through the ventilation holes 600 of each fixing plate 60, and then fixed to wire fixing parts 311 provided on the left and right side walls of the power supply case 30, respectively. Two loops formed on both ends of the wire 70 are fixed to each wire fixing part 311, one each. As a result, for example, when the fixing part 22 of the arm 2 comes off the stand Z1, or when the holding part 21 of the arm 2 comes off the mounting part 33 of the power supply case 30, the wire 70 supports the power supply case 30 to prevent the lighting fixture A1 from falling. Also, for example, when the fixing base 6 comes off the power supply case 30 together with the light source unit 1, the wire 70 supports the fixing base 6 to prevent the light source unit 1 from falling.

[0081] In the lighting fixture A1, the light source unit 1 and the power supply unit 3 can be rotated with respect to the arm 2 with the mounting screw 333 as a fulcrum (rotation axis). That is, in the lighting fixture A1, the light source unit 1 can be rotated with the left-right direction of the light source unit 1 as an axis. The worker performing the installation work rotates the display member 5 so that the first scale 51 or the second scale 52 of the desired angle overlaps with the upper edge of the indicating portion 25 of the display member 5 (see Figs. 8A and 8B). This allows the worker to adjust the vertical angle of the lighting fixture A1, that is, the vertical direction of the light (illumination light) emitted from the light source unit 1. In short, when the worker rotates the display member 5 clockwise with the lock mechanism 26 unlocked as shown in Fig. 8B, it becomes possible to rotate the light source unit 1 so that the light emission surface 103 of the light source unit 1 faces downward. In addition, in this embodiment, since the optical axis L1 of the light source module 10 is inclined upward from the normal line H1 of the first surface 1201 of the base member 120 of the heat dissipation block 12, it is possible to widen the irradiation range of the light source unit 1. In other words, it is possible to increase the irradiation angle of the light source unit 1. In this embodiment, the angle (rotation angle) θ2 when the light source unit 1 is rotated so that the light emission surface 103 of the light source unit 1 faces downward is 60 degrees, but this angle is not particularly limited, and may be, for example, 60 degrees or more. In this embodiment, the irradiation angle of the light source unit 1 is 70 degrees, but this angle is not particularly limited. The irradiation angle is the angle obtained by combining the angle θ1 between the optical axis L1 of the light source module 10 and the normal line H1 of the base member 120 and the rotation angle θ2 (see FIG. 8B).

[0082] (3) Effects As described above, in the lighting fixture A1 according to the embodiment, the arm 2 has a pair of bent portions 23 at which it is bent in a side view of the light source unit 1, so that the light source unit 1 can be rotated further downward compared to the lighting fixture of the conventional example. As a result, in the lighting fixture A1, the light source unit 1 can be rotated further downward, so that it is possible to reduce light leakage (light pollution) into residential houses and farmland around the installation site (for example, a stadium, etc.).

[0083] Furthermore, in the lighting device A1 according to this embodiment, as described above, when the light source unit 1 is rotated so that the light emission surface 103 of the light source unit 1 faces downward, the pair of bent portions 23 prevent the edges of the light source unit 1 from coming into contact with each other, so that the light source unit 1 can be rotated further downward. In other words, the downward rotation range of the light source unit 1 can be increased.

[0084] Furthermore, in the lighting fixture A1 according to this embodiment, as described above, the arm 2 has the pair of wide portions 24 that are wider than the pair of holding portions 21 and the pair of bending portions 23, making it possible to prevent a decrease in strength and rigidity of the arm 2. As a result, for example, when the lighting fixture A1 is installed at a high place, it is possible to prevent the light source unit 1 from shaking due to the influence of wind or the like and causing the arm 2 to deform.

[0085] Furthermore, in the lighting device A1 according to the present embodiment, as described above, the pair of wide portions 24 are connected to the pair of bent portions 23, and therefore it is possible to further suppress a decrease in the strength and rigidity of the arm 2 compared to a case in which the pair of wide portions 24 are not connected to the pair of bent portions 23. A case in which the pair of wide portions 24 are not connected to the pair of bent portions 23 is, for example, a case in which a separate member having the same dimension as the width dimension at the tip of each holding portion 21 is provided between the pair of bent portions 23 and the pair of wide portions 24.

[0086] Furthermore, in the lighting device A1 according to this embodiment, as described above, each of the pair of wide portions 24 is tapered so that both the front and rear ends protrude in a side view of the light source unit 1, which makes it possible to increase the strength with which the arm 2 supports the light source unit 1. Since the lighting device A1 has the pair of bent portions 23, the center of gravity of the light source unit 1 moves forward, but since the pair of wide portions 24 are tapered, it is possible to increase the strength with which the arm 2 supports the light source unit 1, and it is possible to prevent the light source unit 1 from tilting forward.

[0087] Furthermore, in the lighting device A1 of this embodiment, as described above, the pair of bent portions 23 are the narrowest parts of the arm 2, so that when the light source unit 1 is rotated so that the light emission surface 103 of the light source unit 1 faces downward, it is further possible to prevent the edges of the light source unit 1 from coming into contact with the bent portions 23.

[0088] Furthermore, in the lighting device A1 of this embodiment, as described above, the optical axis L1 of the light-emitting unit 102 (light source module 10) is inclined upward from the normal H1 of the front surface of the housing 4 (the first surface 1201 of the base member 120), thereby reducing the glare of the light from the light source unit 1.

[0089] (4) Modifications of the embodiment In the above embodiment, the lighting fixture A1 includes one light source unit 1, but may include two or more light source units. In this case, the lighting fixture A1 includes a connecting member that connects the plurality of light source units 1. In the above embodiment, the lighting fixture A1 includes a plurality of lens units 111 that tilt the optical axis L1 of the light source module 10 upward from the normal line H1 of the first surface 1201 of the base member 120 of the heat dissipation block 12, but is not limited to this configuration. For example, the lighting fixture A1 may include a configuration in which the substrate 101 of the light source module 10 is inclined at a specified angle and attached to the first surface 1201 of the base member 120. In the above embodiment, the width dimension of the pair of bending portions 23 is smaller than the width dimension at the tip of the pair of holding portions 21, but may be the same as the width dimension at the tip of the pair of holding portions 21.

[0090] The lighting device A1 according to the above-described modified example also provides the same effects as the lighting device A1 according to the embodiment.

[0091] In the above-described embodiment, each of the pair of wide portions 24 is configured in a tapered shape such that both the front end and the rear end protrude in a side view of the light source unit 1. However, it may be configured such that at least one of the front end and the rear end protrudes. For example, each of the pair of wide portions 24 may be configured such that only the front end of each wide portion 24 protrudes in a side view of the light source unit 1, or may be configured such that only the rear end of each wide portion 24 protrudes. Even in these cases, it is possible to increase the strength with which the arm 2 supports the light source unit 1.

[0092] The embodiments and modifications described above are only a part of various embodiments and modifications of the present disclosure.

[0093] (Aspect) The following aspects are disclosed in this specification.

[0094] The lighting fixture (A1) according to the first aspect includes a light source unit (1) and an arm (2) that supports the light source unit (1). The arm (2) has a pair of holding portions (21), a fixing portion (22), and a pair of bending portions (23). The pair of holding portions (21) holds the light source unit (1) so as to be rotatable about the left-right direction axis of the light source unit (1). The fixing portion (22) fixes the arm (2). The pair of bending portions (23) are provided in a portion between the pair of holding portions (21) and the fixing portion (22), and are portions where the arm (2) bends in a side view of the light source unit (1).

[0095] According to this aspect, it becomes possible to further rotate the light source unit (1) downward.

[0096] The lighting fixture (A1) according to the second aspect is, in the first aspect, configured such that when the light source unit (1) is rotated so that the light emitting surface (103) of the light source unit (1) faces downward, the pair of bending portions (23) avoid contact of the edge of the light source unit (1).

[0097] According to this embodiment, it is possible to rotate the light source unit (1) further downward. In other words, it is possible to increase the range of rotation of the light source unit (1) in the downward direction.

[0098] The lighting fixture (A1) of the third aspect is the same as that of the second aspect, except that the arm (2) is provided in a portion between the pair of bending portions (23) and the fixed portion (22) and further has a pair of wide portions (24) that are wider than the pair of holding portions (21) and the pair of bending portions (23).

[0099] According to this embodiment, it is possible to prevent the strength and rigidity of the arm (2) from decreasing.

[0100] The lighting fixture (A1) according to the fourth aspect is the lighting fixture of the third aspect, in which the pair of wide portions (24) are connected to the pair of bent portions (23).

[0101] According to this embodiment, it is possible to further prevent the strength and rigidity of the arm (2) from decreasing, compared to a case in which the pair of wide portions (24) are not connected to the pair of bent portions (23).

[0102] The lighting fixture (A1) of the fifth aspect is the third aspect, and each of the pair of wide portions (24) is configured so that at least one of the front end and the rear end protrudes when viewed from the side of the light source unit (1).

[0103] According to this embodiment, it is possible to increase the strength with which the arm (2) supports the light source unit (1).

[0104] The lighting fixture (A1) of the sixth aspect is the third aspect, and each of the pair of wide portions (24) is configured in a tapered shape so that both the front and rear ends protrude when viewed from the side of the light source unit (1).

[0105] According to this embodiment, it is possible to increase the strength with which the arm (2) supports the light source unit (1).

[0106] The lighting fixture (A1) according to the seventh aspect is any one of the first to sixth aspects, in which the pair of bent portions (23) are the narrowest parts of the arm (2) between the pair of holding portions (21) and the fixed portion (22).

[0107] According to this embodiment, when the light source unit (1) is rotated so that the light emission surface (103) of the light source unit (1) faces downward, it is further possible to prevent the edge of the light source unit (1) from contacting the bent portion (23).

[0108] In a lighting fixture (A1) according to an eighth aspect, in the first aspect, a light source unit (1) has a light-emitting unit (102) and a box-shaped housing (4) that houses the light-emitting unit (102). An optical axis (L1) of the light-emitting unit (102) is inclined upward from a normal line (H1) to the front surface of the housing (4).

[0109] According to this embodiment, the glare of the light from the light source unit (1) can be reduced.

[0110] The configurations according to the second to eighth aspects are not essential to the lighting fixture (A1) and may be omitted as appropriate. [Explanation of symbols]

[0111] 1 Light source unit 2 Arm 4. Chassis 21 Holding part 22 Fixed part 23 Bend 24 Wide section 102 Light emitting part 103 Light exit surface A1 Lighting equipment H1 normal L1 optical axis

Claims

1. A light source unit; an arm supporting the light source unit, The arm is a pair of holders that hold the light source unit so as to be rotatable about an axis in the left-right direction of the light source unit; A fixing portion for fixing the arm; a pair of bending portions provided between the pair of holding portions and the fixing portion, the bending portions being portions at which the arms are bent in a side view of the light source unit; Lighting fixtures.

2. The pair of bent portions are configured to prevent edges of the light source unit from coming into contact with each other when the light source unit is rotated so that the light emission surface of the light source unit faces downward.

2. A lighting fixture according to claim 1.

3. The arm is provided in a portion between the pair of bent portions and the fixed portion, and further includes a pair of wide portions that are wider than the pair of holding portions and the pair of bent portions.

3. A lighting device according to claim 2.

4. The pair of wide portions are connected to the pair of bent portions.

4. A lighting device according to claim 3.

5. Each of the pair of wide portions is configured such that at least one of a front end and a rear end protrudes in a side view of the light source unit.

4. A lighting device according to claim 3.

6. Each of the pair of wide portions is tapered so that both ends of a front end and a rear end protrude in a side view of the light source unit.

4. A lighting device according to claim 3.

7. The pair of bent portions are narrowest portions of the arm between the pair of holding portions and the fixed portion. A luminaire according to any one of claims 1 to 6.

8. The light source unit includes: A light emitting portion; A box-shaped housing that houses the light-emitting unit, The optical axis of the light emitting unit is inclined upward from the normal to the front surface of the housing.

2. A lighting fixture according to claim 1.

Images