projector

Abstract

To provide a projector which can be tilted greatly both downward and upward, and whose handling does not become troublesome.SOLUTION: A projector 1 includes: one or a plurality of light source units 2; a wire connection box 4 which has a power source space 53 for storing a power source device 52; an arm 8 for pivotally supporting a side surface 40B of the wire connection box 4 so as to rotate, and fixed to an installation surface E; and a connection tool 6 for connecting the light source unit 2 and the wire connection box 4. The wire connection box 4 is connected to a back surface side of the light source unit 2 having a gap δ, and a pivot support point 8A1 where the arm 8 pivotally supports the wire connection box 4 is positioned below a center O of a dimension in the vertical direction DC of the wire connection box 4.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a floodlight. [Background technology]

[0002] The floodlights that illuminate baseball stadiums are generally mounted on steel towers several tens of meters above ground level, with the direction of illumination tilted downward by up to about 30 degrees from the horizontal. In recent years, there has been an increasing demand for multi-purpose stadiums for various sports other than baseball, such as soccer and track and field. In multi-purpose stadiums, there is a tendency to place floodlights at higher positions in order to place them outside the field of vision of the players, or to dim the cross-shaped shadows cast by the players, etc.

[0003] The higher the floodlight is installed, the more it becomes necessary to tilt the direction of illumination of the floodlight downwards than before in order to illuminate the same location in the stadium. However, if the downward tilt is made too large, there is a problem that part of the illumination light is blocked by structures such as the arm for fixing the floodlight and the installation surface of the floodlight.

[0004] Meanwhile, for such floodlights, a configuration is known in which an arm extends obliquely forward from the installation surface of the device and the floodlight body is supported by the front end of the arm (see, for example, Patent Documents 1 and 2). With this configuration, the illuminating light is less likely to be blocked by the arm when the floodlight body is tilted downward, compared to a configuration in which the arm extends upward from the installation surface. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2020-9760 A [Patent Document 2] JP 2019-21647 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, simply extending the arm diagonally forward as in Patent Documents 1 and 2 poses the problem that the arm becomes longer, becomes weaker against vibration, and lacks mechanical strength. If the plate thickness of the arm is increased to solve this problem, a new problem arises that the weight of the device increases. In addition, methods of ensuring strength without increasing the plate thickness of the arm include welding a reinforcing member to the arm, or processing the arm with reinforcing bends or ribs. However, these methods require welding or processing with a mold, which leads to increased costs.

[0007] Incidentally, floodlights may also be used for lighting purposes, in which case the floodlight is generally tilted upward to provide lighting. For example, in a fixture in which a power supply box is integrally provided behind a light source unit as in Patent Document 1, in such lighting, in addition to the blocking of illumination light by the arm during downward irradiation, it is also necessary to consider that the power supply box does not interfere with the arm when the fixture is tilted upward for upward irradiation, and both issues cannot be resolved at the same time by simply shortening the arm.

[0008] In response to market demand for the illumination direction to be set to more than 30 degrees both below and above the horizontal, most floodlights are unable to simultaneously satisfy both downward and upward illumination conditions, and so currently only one of the illumination ranges is limited.

[0009] For upward illumination, it is possible to adopt a configuration in which the power supply unit is separated from the fixture as a separate unit, as in Patent Document 2, to prevent interference between the power supply unit and the arm. However, if the power supply unit is separated, a new installation location for the power supply unit must be secured, and separate construction work must be performed to install the power supply unit, which causes problems such as the need to handle the power supply unit more complicatedly. This problem becomes more pronounced the more floodlights are installed.

[0010] An object of the present invention is to provide a floodlight that can be tilted significantly both downward and upward and that is not complicated to handle. [Means for solving the problem]

[0011] One aspect of the present invention is a floodlight comprising one or more light source units, a wiring box having a power supply space for accommodating a power supply unit, an arm that rotatably supports the side of the wiring box and is fixed to an installation surface, and a connector that connects the light source units and the wiring box, wherein the wiring box is connected to the rear side of the light source unit with a gap, and the pivot point at which the arm supports the wiring box is located below the center of the vertical dimension of the wiring box.

[0012] Another aspect of the present invention is characterized in that, in the above-mentioned floodlight, the connector is a plate-like member provided with one or a plurality of through holes.

[0013] Another aspect of the present invention is characterized in that, in the above-mentioned floodlight, the light source unit is provided with a heat dissipation fin, and one of the through holes is a first through hole formed in a position facing the heat dissipation fin in a side view.

[0014] Another aspect of the present invention is characterized in that, in the above-mentioned floodlight, one of the through holes is a second through hole formed to face the surface of the wiring box facing the light source unit in a side view.

[0015] Another aspect of the present invention is characterized in that, in the above-described floodlight, the wiring box has a base plate that divides the interior, and a portion of the base plate is shaped to expand the space at the point where external wiring is introduced inside the box.

[0016] Another aspect of the present invention is characterized in that, in the above-mentioned floodlight, the center of gravity excluding the arm is located between the light source unit and the wiring box in a side view. Effect of the Invention

[0017] According to the present invention, the device can be tilted significantly both downward and upward, and handling is not complicated. [Brief description of the drawings]

[0018] [Figure 1] 1 is a perspective view of a floodlight according to an embodiment of the present invention, as viewed from the front side. [Diagram 2] FIG. [Diagram 3] FIG. 2 is a perspective view of the floodlight as viewed from the rear side. [Figure 4] FIG. 2 is a perspective view showing a configuration of a light source unit. [Diagram 5] FIG. [Figure 6] FIG. 4 is a perspective view showing the wiring box with the lid removed. [Figure 7] 4 is a cross-sectional view showing the internal configuration of the wiring box with the lid removed. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a perspective view of a floodlight 1 according to this embodiment as viewed from the front side, and Fig. 2 is a side view of the floodlight 1. Also, Fig. 3 is a perspective view of the floodlight 1 as viewed from the rear side. The floodlight 1 of this embodiment is a device suitable for floodlighting the multi-purpose stadium described above, and as shown in Figures 1 to 3, is equipped with a light source unit 2 that emits illumination light, a wiring box 4 that supplies power to the light source unit 2, a connector 6 that connects the light source unit 2 and the wiring box 4, and an arm 8 that supports the wiring box 4 so that it can rotate freely. 2, hereinafter, the front side of the floodlight 1 will be referred to as the front DA, and the back side of the floodlight 1 will be referred to as the rear DB. Also, the vertical direction will be referred to as the up-down direction.

[0020] As shown in FIG. 2, the floodlight 1 of this embodiment is provided with multiple (three in the illustrated example) light source units 2 arranged side by side in the vertical direction DC to achieve high output, and a wiring box 4 is arranged at a distance LA behind the light source units 2 DB, and the light source units 2 and the wiring box 4 are connected by a connector 6.

[0021] 2, the arm 8 is substantially linear in shape extending obliquely from the front DA to the rear DB in a side view, with a pivot 8A1 provided at its upper end 8A for pivotally supporting the wiring box 4, and a fixed piece 8C provided at its lower end 8B, which is a distance LB away from the pivot 8A1 toward the rear DB. This fixed piece 8C is fixed to a substantially horizontal installation surface E of an arbitrary structure such as a steel tower with a bolt or the like. In this embodiment, the fixed point 8C1 to which the fixed piece 8C is fixed is set at a position that is a distance LC away from the lower end 8B toward the rear DB, and is configured to move the pivot 8A1 away from the fixed point 8C1 toward the front DA.

[0022] According to this configuration, compared to a configuration in which the arm 8 pivotally supports the light source unit 2, the light source unit 2 is disposed farther toward the front DA side from the fixed piece 8C of the lower end portion 8B of the arm 8. As a result, even if the light source unit 2 is tilted significantly downward from the horizontal direction DH (for example, when tilted 60 degrees downward from the horizontal direction DH), the illumination light is less likely to be blocked by the structure to which the arm 8 or the fixed piece 8C is fixed.

[0023] In addition, as in Patent Document 1, in a configuration in which the arm is positioned on the side of the light source unit and the power supply box and the wiring box (hereinafter referred to as the power supply box, etc.) are arranged behind the light source unit, the power supply box, etc. are separated rearward from the pivot point of the arm. Therefore, when the light source unit rotates upward, the power supply box, etc. are likely to interfere with the arm, and the light source unit can only be directed upward within a range where such interference does not occur. Furthermore, when the light source unit is directed upward, the working area of ​​the fixing point (near the fixing point 8C1 in this embodiment) that fixes the arm to the installation surface is likely to be blocked by the light source unit. Therefore, for example, it becomes difficult to perform an operation such as operating the fixing point to adjust the horizontal position, and workability is poor.

[0024] In contrast, in the floodlight 1 of this embodiment, the pivot point 8A1 of the arm 8 is disposed on the wiring box 4, so that when the light source unit 2 is rotated upward, the trajectory of the wiring box 4 does not interfere with the arm 8, and there is no limit to the angle at which it can be directed upward (upward irradiation angle). In addition, the light source unit 2 tilted upward does not block the vicinity of the fixed point 8C1 of the arm 8, and the horizontal direction DH can be adjusted by operating the fixed point 8C1 regardless of the inclination of the light source unit 2. In other words, the horizontal direction DH and the vertical irradiation direction can be adjusted independently without interfering with each other, improving workability.

[0025] In this embodiment, the pivot point 8A1 of the wiring box 4 is provided at a position biased downward (to the bottom surface 40A) from the center O of the dimension (i.e., length) of the wiring box 4 in the up-down direction DC, and the amount of protrusion of the wiring box 4 downward from the pivot point 8A1 is suppressed in side view. This makes it possible to reduce the distance between the pivot point 8A1 and the fixed piece 8C that must be secured for the rotation of the wiring box 4, and to shorten the vertical length of the arm 8. This makes it possible to reduce the weight of the relatively large floodlight 1.

[0026] The pivot point 8A1 may be disposed at or near the center O of the wiring box 4. For example, when the floodlight 1 has a small number of light source units 2 (for example, one), or when the power consumption of each light source unit 2 is small, the power capacity of the power supply device can be reduced, allowing a relatively small power supply device to be used. In this case, the wiring box 4 can also be made smaller, and the dimension in the up-down direction DC can be shortened. Therefore, even when the pivot point 8A1 is disposed approximately at the center O, it is possible to prevent the arm 8 or the like from blocking the illumination light when the light source unit 2 is tilted downward.

[0027] 3, floodlight 1 includes a rotatable handle 9A whose base end passes through arm 8, a clamping member 9B (FIGS. 5 and 6) that is provided on the face of arm 8 opposite to the face on which handle 9A is provided and with which the base end of handle 9A engages, and an angle display plate 9C provided between connection box 4 and arm 8. Angle display plate 9C is a member also called a depression angle plate that displays the inclination angle of light source unit 2, and is clamped between clamping member 9B and arm 8. The clamping member 9B has a mechanism for pressing the angle display plate 9C against the arm 8 in response to the rotational operation of the handle 9A, and the angle display plate 9C is clamped between the arm 8 and the clamping member 9B so as to be immovable by this pressing and fixing. In this state, the base end of the handle 9A is fastened unrotatably with a nut 9D (FIG. 6), whereby the connection box 4 on which the angle display plate 9C is provided and the light source unit 2 connected to the connection box 4 are fixed unrotatably.

[0028] Next, each part of the floodlight 1 will be described in detail.

[0029] FIG. 4 is a perspective view showing the configuration of the light source unit 2. As shown in FIG. The light source unit 2 includes a box-shaped housing 20, and a rectangular emission opening 22 for emitting illumination light is formed on the front surface of the housing 20, and the emission opening 22 is closed by a cover member 24. A large number of heat dissipation fins 26 are provided upright on a rear surface 20A (FIG. 2) of the housing 20. The heat dissipation fins 26 are thin plate members having a substantially rectangular shape in a side view, and are arranged at substantially equal intervals in the width direction DD (a direction perpendicular to the vertical direction DC in a front view) of the light source unit 2, and are cooled by air passing between the heat dissipation fins 26 in the vertical direction DC. The housing 20 includes a built-in light source section 28 for emitting illumination light, and heat generated by the light source section 28 is transmitted to the housing 20 and efficiently dissipated from the heat dissipation fins 26.

[0030] The housing 20 of this embodiment is not an aluminum die-cast product (casting) but a forged product of pure aluminum, which has superior thermal conductivity and corrosion resistance, high heat dissipation performance, and is less susceptible to deterioration due to rainwater compared to aluminum die-cast products. Furthermore, the housing 20, which is a forged product, is also superior in mechanical strength. In order to further improve corrosion resistance, surface treatment such as painting or plating may be applied to the housing 20. In addition, when the shape of the housing 20 is complicated, aluminum die casting may be used to facilitate manufacturing.

[0031] The light source unit 28 may have any configuration, but the light source unit 28 of this embodiment includes a light source and a light control member that controls the light emitted from the light source. The type of light source may be any type, but may be a light-emitting element, and in this embodiment, a number of SMD-type LEDs are used. The light control member is typically a transmissive or reflective optical member. In this embodiment, a lens cover is used as the light control member, and a lens for each LED is integrally formed on the surface of a transparent plate material that covers each LED, making the configuration simpler than when the cover and lens are separate parts.

[0032] In this embodiment, the emission direction DE (optical axis) of the light source unit 2 is approximately perpendicular to the opening surface of the emission opening 22, but may have any inclination with respect to the opening surface.

[0033] 3, the wiring box 4 is a unit for connecting various external wirings 5A extending from the outside and inter-unit wirings 5B for supplying power to each of the light source units 2. The external wirings 5A are, for example, power lines, control lines, and transmission wirings for connecting other floodlights 1. The wiring box 4 of this embodiment comprises a box-shaped case body 40 and a removable lid body 42 that opens the top surface of the case body 40 (the surface on the rear side of the floodlight 1), both of which are formed from an aluminum alloy, and the surfaces are treated with surface treatments such as painting or plating to prevent corrosion.

[0034] FIG. 5 is a plan view of the rear side of floodlight 1. FIG. As shown in the figure, the cover 42 of the wiring box 4 is generally rectangular in plan view and is fastened to the case body 40 by a plurality of screws 43. In this embodiment, the cover 42 is fixed by the screws 43 at four corners and at two centers of the upper side 42A and the lower side 42B. A drainage groove 45 is provided on the surface of the cover 42, extending vertically through the screwed portion at the center of the upper side 42A, and the drainage groove 45 allows water to be drained downward from the screwed portion of the upper side 42A. This prevents water from pooling at the screwed portion of the upper side 42A and suppresses corrosion of the screws 43. Although not shown, the rear surface of the lid 42 in this embodiment is provided with a portion to which an earth wire is attached and a portion to which a fall prevention wire for preventing the lid 42 from falling is attached.

[0035] As shown in Figure 3 above, a plurality of cable glands 44 for introducing and fixing the external wiring 5A and the inter-unit wiring 5B are arranged on the bottom surface 40A of the wiring box 4, and the side surface 40B of the wiring box 4 is supported by the arm 8 so as to be freely rotatable.

[0036] FIG. 6 is a perspective view showing the wiring box 4 with the lid 42 removed, and FIG. 7 is a cross-sectional view showing the internal configuration of the wiring box 4 with the lid 42 removed. As shown in FIG. 6, an opening edge 40C of the case body 40 is provided with a groove 47 for assembling a gasket, and the wiring box 4 is sealed by the lid body 42 being in close contact with the opening edge 40C to which the gasket is attached. Inside the wiring box 4, a metal base plate 46 is disposed facing the lid 42, and the inside is divided into a front DA side and a rear DB side by the base plate 46, as shown in Fig. 7. A terminal block 48 for wiring and various electronic components such as a surge protection circuit 50 are provided on a first surface 46A of the base plate 46 facing the lid 42. Meanwhile, inside the wiring box 4, as shown in Fig. 7, a power supply space for accommodating a power supply device 52 that supplies power to the light source unit 2 is provided on the side opposite to the first surface 46A of the base plate 46 (the side closer to the light source unit 2).

[0037] At least the same number of cable glands 44 as the inter-unit wirings 5B are provided at positions corresponding to the power supply space 53, and the inter-unit wirings 5B extending from the light source units 2 are drawn into the power supply space 53 through those cable glands 44 and connected to the power supply devices 52. Meanwhile, the power supply devices 52 are connected to the terminal block 48 by wiring inside the wiring box 4. The remaining cable glands 44 are used by an installer to draw the external wirings 5A into the wiring box 4 when installing the floodlight 1.

[0038] 7, the base plate 46 has a bent shape in which a bottom surface facing portion 46B facing the bottom surface 40A of the case body 40 is bent in a direction away from the cover body 42 (forward DA). The bottom surface 40A of the case body 40 is a portion where the external wiring 5A is drawn in, and the bottom surface facing portion 46B facing the bottom surface 40A has the bent shape, so that the introduction space for the external wiring 5A inside the wiring box 4 is expanded. This makes it easier to introduce the external wiring 5A drawn in from the cable gland 44 on the bottom surface 40A into the wiring box 4. In addition, in a side view, the position of the cable gland 44 into which the external wiring 5A is introduced can be moved to the side of the power source space 53 (the side away from the cover body 42), so that the thickness of the wiring box 4 in the front-rear direction can be reduced, and the wiring box 4 can be made smaller and lighter.

[0039] It should be noted that, instead of bending the bottom surface facing portion 46B of the base plate 46, a configuration in which a notch is provided in the bottom surface facing portion 46B can also provide the same effect as that achieved by the bent shape of the bottom surface facing portion 46B. However, when a notch is formed in the base plate 46 made of sheet metal, if the cross section of the notch is not deburred sufficiently, the external wiring 5A may be damaged by the burrs. In particular, when the floodlight 1 is installed on a steel tower in a stadium, the floodlight 1 is often exposed to vibration and shaking. Even if the installer pays attention to the burrs on the cross section of the notch during installation and connects the external wiring 5A, the external wiring 5A may be gradually damaged by the burrs due to vibration and shaking after installation. In contrast, in a configuration in which the bottom surface facing portion 46B of the base plate 46 is bent, the external wiring 5A comes into contact with the portion of the base plate 46 bent at an obtuse angle, and the external wiring 5A does not come into contact with the cut surface of the sheet metal, so the external wiring 5A is not damaged by the base plate 46.

[0040] In addition, the bottom facing portion 46B of the base plate 46 may be configured into a shape that is away from the lid body 42 and expands the introduction space for the external wiring 5A, for example by hemming bending or curling processing, in addition to bending or notching, which is not directly affected by burrs on the cut surface of the sheet metal.

[0041] In the floodlight 1 of the present embodiment, the power supply device 52 is built in the power supply space 53 of the wiring box 4, but when a floodlight 1 with a separate power supply specification is required, for example, it is not necessary to store the power supply device 52 in the power supply space 53. In this case, the separately installed power supply device 52 and the light source unit 2 are connected through the terminal block 48 of the wiring box 4.

[0042] The connector 6 is a member provided on both sides of the floodlight 1 in the width direction DD (Figure 4), and as shown in Figure 2, it is a member that connects multiple light source units 2 lined up in the vertical direction DC, and connects the wiring box 4 to these light source units 2 at a position a distance LA away from them at the rear DB.

[0043] The connector 6 of this embodiment is a metal (such as stainless steel) plate, and the surface is subjected to a surface treatment such as painting or plating to enhance corrosion resistance. Such a connector 6 has one end 6A located at the rear DB fixed to the side 40B of the wiring box 4 with multiple screws 60, and the other end 6B located at the front DA fixed to the back surface 20A of each light source unit 2 with screws 62. At the other end 6B of the connector 6, as shown in FIG. 3, a screw fastening piece 6B1 is formed by bending into an L shape, and this screw fastening piece 6B1 is fixed by a screw 62 while in face contact with the rear surface 20A of the light source unit 2. This allows the light source unit 2 to be fixed with sufficient strength even though the connector 6 is plate-shaped, compared to a configuration in which the other end 6B of the connector 6 is screwed to the side of the light source unit 2, just like the one end 6A. Furthermore, when the plate-shaped connector 6 is fixed to each side surface of the light source unit 2 and the wiring box 4, the widths of the light source unit 2 and the wiring box 4 must be the same, which places restrictions on the design of the light source unit 2 and the wiring box 4. In contrast, according to the configuration of this embodiment, such restrictions do not arise.

[0044] 2, the connector 6 of the present embodiment has a first through hole 66A and a second through hole 66B provided in its surface. By providing the first through hole 66A and the second through hole 66B, even in a configuration in which the plate-shaped connector 6 is disposed to the side of the floodlight 1, it is possible to ensure ventilation in the width direction DD and to reduce the weight of the connector 6.

[0045] The first through holes 66A are provided at positions corresponding to the light source units 2, and in this embodiment, one is provided between each of the light source units 2. Each of the first through holes 66A is formed to be large enough to cover the heat dissipation fins 26 of the light source units 2 adjacent to each other in the vertical direction in a side view, and the heat dissipation fins 26 are efficiently cooled by the air taken in through the first through holes 66A. That is, the first through holes 66A and the gaps between the fins of the heat dissipation fins 26 are aligned in a straight line. This allows the heat dissipation fins 26 to be efficiently cooled by the air taken in through the first through holes 66A.

[0046] The second through hole 66B is provided at a position corresponding to the gap δ (FIG. 2) between the light source unit 2 and the wiring box 4. The second through hole 66B is formed at a position facing the surface 4A of the wiring box 4 on the front DA side in a side view. Specifically, as described above, one end 6A of the connector 6 is fixed to the side surface 40B of the wiring box 4, and the second through hole 66B is opened to a size that allows a part of the side surface 40B of the wiring box 4 to be seen from the side. Therefore, the wiring box 4 is efficiently cooled by the air taken into the gap δ. In addition, inside the wiring box 4, the power supply space 53 is located on the front DA side, so that the power supply device 52 accommodated in the power supply space 53 can be efficiently cooled.

[0047] In the floodlight 1, as described above, since the heat dissipation fins 26 of the light source unit 2 extend in the vertical direction DC, air flow in the vertical direction DC is easily generated near the heat dissipation fins 26, and air flow in the width direction DD perpendicular to the vertical direction DC is easily generated in the first through hole 66A and the second through hole 66B. In this way, air flows in both the vertical direction DC and the width direction DD, and the heat dissipation performance is improved compared to the case where air flows in only one direction. In addition, by improving the heat dissipation performance in this way, even if the distance LA between the light source unit 2 and the wiring box 4 is reduced, the light source unit 2 and the wiring box 4 can be sufficiently cooled. Furthermore, by reducing the distance LA, the entire device can be made smaller and lighter. Furthermore, for example, as shown in Patent Document 1, in a configuration in which the arm's pivot point is on the side of the light source unit, the arm is structured to block part of the ventilation in the width direction DD, and further, at a certain tilt angle, the ventilation is largely blocked. In contrast, in the floodlight 1 of this embodiment, the pivot point 8A1 of the arm 8 is located behind the gap δ between the light source unit 2 and the wiring box 4, and the arm 8 is structured not to overlap the gap δ in side view. Therefore, regardless of the tilt angle, the arm 8 does not block the ventilation in the width direction DD, and the ventilation is always ensured, making it advantageous over general floodlights in terms of heat dissipation.

[0048] The first through hole 66A and the second through hole 66B may have any shape, but taking into consideration the rigidity and weight of the connector 6, each of them is generally triangular. When the number of light source units 2 is one, the first through hole 66A may be omitted.

[0049] According to this embodiment, the following effects are obtained.

[0050] Floodlight 1 of this embodiment includes a plurality of light source units 2, a wiring box 4 having a power supply space 53 for accommodating a power supply device 52, an arm 8 that rotatably supports wiring box 4 and is fixed to an installation surface E, and a connector 6 that connects light source unit 2 and wiring box 4. Connection box 4 is connected to the rear DB (rear side) of light source unit 2 with a gap δ therebetween, and pivot point 8A1 at which arm 8 pivotally supports wiring box 4 is located below center O of the dimension in the up-down direction DC of wiring box 4.

[0051] According to this configuration, the distance from the fixing point 8C1 of the arm 8 to the installation surface E of the arm 8 to the light source unit 2 is greater than in a configuration in which the arm 8 supports the light source unit 2. As a result, even if the light source unit 2 is tilted significantly downward from the horizontal direction DH, the irradiated light is less likely to be blocked by the arm 8 or the installation surface E. In addition, the pivot point 8A1 at which the arm 8 pivotally supports the connection box 4 is located below the center O of the dimension in the vertical direction DC of the connection box 4, so that the space between the pivot point 8A1 and the fixed point 8C1 that must be secured in order to enable the light source unit 2 to be tilted significantly both downward and upward can be narrowed. This allows the vertical length of the arm 8 to be shortened, and the floodlight 1 to be made lighter. Furthermore, since the wiring box 4 is connected to the light source unit 2, handling is not complicated compared to a configuration in which the wiring box 4 is a separate body.

[0052] In floodlight 1 of the present embodiment, connector 6 is a plate-like member provided with first through-hole 66A and second through-hole 66B. According to this configuration, even if the space between the light source unit 2 and the wiring box 4 is covered by the connector 6, the ventilation of the space is ensured by the first through hole 66A and the second through hole 66B. As a result, even if the distance LA between the light source unit 2 and the wiring box 4 is shortened, the heat dissipation performance can be improved, and the weight of the connector 6 is also reduced by the first through hole 66A and the second through hole 66B.

[0053] In the floodlight 1 of the present embodiment, the light source unit 2 includes a heat dissipation fin 26, and the first through-hole 66A is formed at a position facing the heat dissipation fin 26 in a side view. This allows the heat dissipation fins 26 to be efficiently cooled by the air taken in through the first through-holes 66A.

[0054] In floodlight 1 of the present embodiment, second through hole 66B is formed so as to face surface 4A of wiring box 4 on the side of light source unit 2 in side view. This allows the wiring box 4 to be efficiently cooled by the air taken into the gap δ between the wiring box 4 and the light source unit 2 .

[0055] In the floodlight 1 of this embodiment, the wiring box 4 has a base plate 46 that divides the interior, and the bottom facing portion 46B of the base plate 46 is shaped to expand the space inside the wiring box 4 at the point where the external wiring 5A is introduced. This makes it easier to introduce external wiring 5A into wiring box 4. In addition, by configuring the shape of the bottom surface opposing portion 46B of the base plate 46 so that the space at the above-mentioned introduction point is expanded in the thickness direction of the wiring box 4 in the front-to-rear direction, the thickness of the wiring box 4 can be made thinner, thereby making it smaller and lighter.

[0056] In the floodlight 1 of this embodiment, the center of gravity excluding the arm 8 is located between the light source unit 2 and the connection box 4 in a side view.

[0057] The above-described embodiment is an example of one mode of the present invention, and any modifications and applications are possible without departing from the spirit and scope of the present invention.

[0058] For example, the floodlight 1 of the present invention is not limited to floodlighting of stadiums, but can be used for any floodlighting.

[0059] In the above-described embodiments, unless otherwise specified, the horizontal, vertical, and other directions, various numerical values, shapes, and materials include a range in which the same action and effect as those directions, numerical values, shapes, and materials are achieved (a so-called equivalent range). [Explanation of symbols]

[0060] 1 Floodlight 2 Light source unit 4 Wiring box 6 Connectors 8 Arm 8A1 Axis fulcrum 8C Fixed piece 8C1 Fixed point 26 Heat dissipation fin 46 Base plate 46B Bottom facing part 52 Power supply 66A First through hole (through hole) 66B Second through hole (through hole) DA forward DB rear (back side) DC vertical direction DD width direction DE emission direction DH Horizontal E Installation surface δ Gap

Claims

1. One or more light source units; a wiring box having a power supply space for accommodating a power supply device; an arm that pivotally supports a side surface of the wiring box and is fixed to an installation surface; A connector that connects the light source unit and the wiring box; Equipped with The wiring box is The light source unit is connected to the rear side of the light source unit with a gap therebetween, The pivot point at which the arm pivotally supports the wiring box is located below the center of the vertical dimension of the wiring box. A floodlight characterized by the above.

2. The connector is a plate-like member having one or more through holes.

2. The floodlight according to claim 1 .

3. The light source unit includes a heat dissipation fin, Any one of the through holes is a first through hole formed at a position facing the heat dissipation fin in a side view.

3. The floodlight according to claim 2.

4. Any one of the through holes is a second through hole formed to face a surface of the wiring box on the side of the light source unit in a side view.

4. The floodlight according to claim 2 or 3.

5. The wiring box includes a base plate that divides the inside of the box, A portion of the base plate is The shape is such that it expands the space inside where external wiring is introduced.

5. A floodlight according to claim 1.

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