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 light tilted downward by up to approximately 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 to place them outside the field of view of the players or to dim the cross-shaped shadows cast by the players.

[0003] The higher the installation height of the floodlights, the more they need to tilt the direction of illumination downward than before in order to illuminate the same area within the stadium. However, if the downward tilt is too great, there is a problem in that part of the illumination light is blocked by structures such as the arms that secure the floodlights and the installation surface of the floodlights.

[0004] Meanwhile, in such floodlights, a configuration is known in which an arm extends obliquely forward from the installation surface of the fixture 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] Japanese Patent Application Publication No. 2020-9760 [Patent Document 2] Japanese Patent Application Publication No. 2019-21647 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, results in a problem in that the arm becomes longer, making it more susceptible to vibration and lacking mechanical strength. Increasing the arm's plate thickness, for example, to solve this problem, creates a new problem in that the weight of the device increases. Possible methods for ensuring strength without increasing the arm's plate thickness include welding a reinforcing member to the arm or processing the arm with reinforcing bends or ribs. However, these methods require welding or processing using a mold, which increases costs.

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

[0008] In response to market demands for the illumination direction to be set to 30 degrees or more both below and above the horizontal, many floodlights are currently unable to simultaneously satisfy both downward and upward illumination conditions, and are therefore limited to one of the illumination ranges.

[0009] Regarding upward illumination, it is conceivable 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, separating the power supply unit creates problems such as the need to secure a new installation location for the power supply unit and the need for additional installation work, making handling of the power supply unit more complicated. 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 greatly 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 arranged on the rear of the light source unit, an arm that rotatably supports the wiring box and is fixed to an installation surface, and a connector that connects the light source unit and the wiring box with a gap, wherein the arm is connected to the side of the wiring box at the pivotal support point, and the connector is connected to the wiring box at a point different from the point at which the wiring box is pivotally supported by the arm when viewed from the side of the wiring box.

[0012] Another aspect of the present invention is characterized in that, in the above-described floodlight, the connector is a plate-like member provided with one or more 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 so as to face the surface of the wiring box facing the light source unit when viewed from the side.

[0015] Another aspect of the present invention is characterized in that, in the above-mentioned 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. [Effects of the Invention]

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

[0018] [Figure 1] 1 is a perspective view of a floodlight according to an embodiment of the present invention, viewed from the front side; [Figure 2] FIG. [Figure 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 the configuration of a light source unit. [Figure 5] FIG. 2 is a plan view of the rear side of the floodlight. [Figure 6] FIG. 2 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 INVENTION

[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 seen 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 seen from the rear side. The floodlight 1 of this embodiment is a device suitable for floodlighting the above-mentioned multipurpose stadium, and as shown in Figures 1 to 3, it comprises 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 projector 1 will be referred to as the front DA, and the rear side of the projector 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 Figure 2, the floodlight 1 of this embodiment has multiple (three in the illustrated example) light source units 2 arranged side by side in the vertical direction DC, thereby achieving high output.A wiring box 4 is arranged behind these light source units 2 DB at a distance LA, and these light source units 2 and wiring box 4 are connected by a connector 6.

[0021] 2, the arm 8 has a generally linear shape extending obliquely from the front DA to the rear DB in a side view, with a pivot point 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 point 8A1 toward the rear DB. This fixed piece 8C is then fixed with a bolt or the like to a generally horizontal installation surface E of any structure, such as a steel tower. In this embodiment, the fixed point 8C1 to which the fixed piece 8C is fixed is set at a position a distance LC away from the lower end 8B toward the rear DB, so that the pivot point 8A1 is configured to be farther 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 positioned farther forward DA from the fixed piece 8C at the lower end 8B of the arm 8. As a result, even when 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 fixed piece 8C is fixed.

[0023] Furthermore, in a configuration such as that described in Patent Document 1, in which the arm is positioned next to the light source unit and the power supply box and wiring box (hereinafter referred to as the power supply box, etc.) are arranged behind the light source unit, the power supply box, etc. are spaced rearward from the pivot point of the arm. Therefore, when the light source unit rotates upward, the power supply box, etc. is likely to interfere with the arm, and the light source unit can only be turned upward within a range where this interference does not occur. Furthermore, when the light source unit is turned upward, the light source unit is likely to block the working area of ​​the fixing point (near fixing point 8C1 in this embodiment) that fixes the arm to the installation surface. This makes it difficult to perform tasks such as manipulating the fixing point to adjust the horizontal position, resulting in poor workability.

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

[0025] Furthermore, in this embodiment, the pivot point 8A1 of the wiring box 4 is located at a position (bottom surface 40A) that is biased downward 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 reduced in side view. This reduces the distance between the pivot point 8A1 and the fixed piece 8C that must be ensured for rotation of the wiring box 4, and shortens the length of the arm 8 in the up-down direction. This allows the weight of the relatively large floodlight 1 to be reduced.

[0026] The pivot point 8A1 may be located at or near the center O of the wiring box 4. For example, if the floodlight 1 is equipped with a small number of light source units 2 (for example, one), or if the power consumption of each light source unit 2 is small, the power capacity of the power supply device can be reduced, allowing for the use of a relatively small power supply device. In this case, the wiring box 4 can also be made smaller, and the dimension in the vertical direction DC can be shortened. Therefore, even if the pivot point 8A1 is located approximately at the center O, it is possible to prevent the arm 8 and 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 surface of arm 8 opposite to the surface on which handle 9A is provided and with which the base end of handle 9A engages, and an angle indicator plate 9C that is provided between wiring box 4 and arm 8. Angle indicator plate 9C is a member also called a depression angle plate that displays the tilt 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 indicator plate 9C against the arm 8 when the handle 9A is rotated, and this pressing and fixing causes the angle indicator plate 9C to be clamped between the arm 8 and the clamping member 9B so as not to move. Then, by fastening the base end of the handle 9A with a nut 9D (Fig. 6) in this state so as not to rotate, the connection box 4 on which the angle indicator plate 9C is provided and the light source unit 2 connected to the connection box 4 are fixed so as not to rotate.

[0028] Next, each part of the projector 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. An emission opening 22, which is rectangular in front view and through which illumination light is emitted, is formed on the front surface of the housing 20. 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 plates that are generally rectangular in side view and are arranged at approximately equal intervals in the width direction DD of the light source unit 2 (a direction perpendicular to the up-down direction DC in front view). The heat dissipation fins 26 are cooled by air passing between the heat dissipation fins 26 in the up-down direction DC. The housing 20 incorporates a light source unit 28 that emits illumination light. Heat generated by the light source unit 28 is transferred 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 (cast product), but a pure aluminum forged product, which has superior thermal conductivity and corrosion resistance, high heat dissipation performance, and reduced deterioration due to rainwater compared to aluminum die-cast products. Furthermore, the housing 20, which is a forged product, also has excellent mechanical strength. In addition, the housing 20 may be subjected to a surface treatment such as painting or plating to further improve corrosion resistance. Furthermore, if the shape of the housing 20 is complex, 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, but is, for example, 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, the light control member is a lens cover in which a lens for each LED is integrally formed on the surface of a transparent plate that covers each LED, making the configuration simpler than when the cover and lens are separate components.

[0032] In this embodiment, the emission direction DE (optical axis) of the light source unit 2 is substantially perpendicular to the opening surface of the emission opening 22, but may have any inclination relative 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 feeder 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 made of an aluminum alloy, and the surface is treated with a coating 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 lid 42 of the wiring box 4 has a generally rectangular shape in a plan view and is fastened to the case body 40 with a plurality of screws 43. In this embodiment, the lid 42 is fixed with screws 43 at four locations at the four corners and two locations at the centers of the top side 42A and bottom side 42B. A drainage groove 45 extending vertically through the screwed portion at the center of the top side 42A is provided on the surface of the lid 42, and this drainage groove 45 allows water to drain downward from the screwed portion of the top side 42A. This prevents water from pooling at the screwed portion of the top 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 that prevents 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 rotatably supported by the arm 8.

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

[0037] At least as many cable glands 44 as the number of 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 these 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-facing portion 46B facing the bottom surface 40A of the case body 40 is bent in a direction (forward DA) away from the lid 42. The bottom surface 40A of the case body 40 is where the external wiring 5A is drawn in, and the bent shape of the bottom-facing portion 46B facing the bottom surface 40A expands the introduction space for the external wiring 5A inside the wiring box 4. 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, because the position of the cable gland 44 through which the external wiring 5A is drawn can be moved toward the power supply space 53 (the side away from the lid 42) in a side view, the thickness of the wiring box 4 in the front-to-rear direction can be reduced, resulting in a smaller size and lighter weight.

[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 the bent shape of the bottom surface facing portion 46B. However, when a notch is formed in base plate 46 made of sheet metal, if the cross section of the notch is not sufficiently deburred, the burrs may damage external wiring 5A. In particular, when floodlight 1 is installed on a steel tower at a stadium, floodlight 1 is often exposed to vibration and shaking. Even if an installer pays attention to burrs on the cross section of the notch when connecting external wiring 5A during installation, there is a risk that external wiring 5A may be gradually damaged by the burrs due to vibration and shaking after installation. In contrast, in a configuration in which bottom-facing portion 46B of base plate 46 is bent, external wiring 5A comes into contact with the obtuse-angled bent portion of base plate 46, and external wiring 5A does not come into contact with the cut surface of the sheet metal, so external wiring 5A is not damaged by base plate 46.

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

[0041] In the floodlight 1 of this embodiment, the power supply device 52 is built into the power supply space 53 of the wiring box 4, but if, for example, a floodlight 1 with a separate power supply specification is required, 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 via the terminal block 48 of the wiring box 4.

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

[0043] The connector 6 of this embodiment is a metal (for example, 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 surface 40B of the wiring box 4 with a plurality of 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. As shown in Figure 3, the other end 6B of the connector 6 has a screw-fastening piece 6B1 formed by L-shaped bending processing, and this screw-fastening piece 6B1 is fixed by a screw 62 while in face contact with the back 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 fixing the plate-shaped connector 6 to the respective side surfaces 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 constraints on the design of the light source unit 2 and the wiring box 4. In contrast, the configuration of this embodiment does not impose such constraints.

[0044] 2, connector 6 of this embodiment has a first through hole 66A and a second through hole 66B formed in its surface. By providing first through hole 66A and second through hole 66B, even in a configuration in which plate-shaped connector 6 is disposed to the side of floodlight 1, breathability in the width direction DD can be ensured and the weight of connector 6 can be reduced.

[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 light source unit 2. Each first through-hole 66A is formed to be large enough to cover the heat dissipation fins 26 of the vertically adjacent light source units 2 in a side view, and the heat dissipation fins 26 are efficiently cooled by the air taken in through the first through-holes 66A. In other words, 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 opens to a size that allows a portion 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 in the gap δ. Furthermore, because the power supply space 53 is located on the front DA side inside the wiring box 4, the power supply device 52 housed in the power supply space 53 can be efficiently cooled.

[0047] In the floodlight 1, as described above, the heat dissipation fins 26 of the light source unit 2 extend in the vertical direction DC, which facilitates airflow in the vertical direction DC near the heat dissipation fins 26. Furthermore, the first through-holes 66A and the second through-holes 66B facilitate airflow in the width direction DD, which is perpendicular to the vertical direction DC. Air flows in both the vertical direction DC and the width direction DD, improving heat dissipation performance compared to air flowing in only one direction. Furthermore, this improved heat dissipation performance allows the light source unit 2 and the wiring box 4 to be sufficiently cooled even if the distance LA between them is reduced. Furthermore, reducing the distance LA also contributes to reducing the overall size and weight of the fixture. Furthermore, as shown in Patent Document 1, for example, in a configuration in which the arm pivot point is located 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 so that it does not overlap the gap δ when viewed from the side. 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, they are both generally triangular. If there is one light source unit 2, the first through-hole 66A may be omitted.

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

[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 pivotally supports wiring box 4 and is fixed to installation surface E, and a connector 6 that connects light source unit 2 and wiring box 4. Wiring box 4 is connected to the rear DB (back 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 of wiring box 4 in the up-down direction DC.

[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. This makes it possible to reduce the likelihood of the irradiated light being blocked by the arm 8 or the installation surface E even when the light source unit 2 is tilted significantly downward from the horizontal direction DH. In addition, the pivot point 8A1 at which the arm 8 pivotally supports the wiring box 4 is located below the center O of the dimension in the vertical direction DC of the wiring box 4, so it is possible to narrow the space between the pivot point 8A1 and the fixed point 8C1 that must be secured to enable the light source unit 2 to be tilted significantly both downward and upward. This allows the vertical length of the arm 8 to be shortened, and the weight of the floodlight 1 to be reduced. Furthermore, since the wiring box 4 is connected to the light source unit 2, handling is not as complicated as when the wiring box 4 is configured as a separate unit.

[0052] In the floodlight 1 of this embodiment, the connector 6 is a plate-like member provided with a first through-hole 66A and a 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 first through hole 66A and the second through hole 66B ensure that the space remains breathable. As a result, even if the distance LA between the light source unit 2 and the wiring box 4 is reduced, 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 this embodiment, the light source unit 2 includes heat dissipation fins 26, and the first through-holes 66A are formed at positions facing the heat dissipation fins 26 in a side view. This allows the heat dissipation fins 26 to be cooled efficiently by the air taken in through the first through-holes 66A.

[0054] In the floodlight 1 of this embodiment, the second through-hole 66B is formed so as to face the surface 4A of the wiring box 4 on the side of the light source unit 2 in a 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 at the point where the external wiring 5A is introduced inside the wiring box 4. This makes it easier to introduce the external wiring 5A into the wiring box 4. Furthermore, 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-back direction, the thickness of the wiring box 4 can be reduced, 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 wiring 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 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] Unless otherwise specified, the horizontal, vertical, and other directions, various numerical values, shapes, and materials in the above-described embodiments include a range (so-called equivalent range) that has the same effect as those directions, numerical values, shapes, and materials. [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 disposed on the rear surface of the light source unit; an arm that pivotally supports the wiring box and is fixed to an installation surface; a connector that connects the light source unit and the wiring box with a gap therebetween; Equipped with The arm The wiring box is connected to a side surface of the wiring box at the pivotal support point, The connector is When viewed from the side of the wiring box, the arm is coupled to the wiring box at a location different from the location at which the wiring box is pivotally supported by the arm. A floodlight characterized by:

2. The portion where the connector is coupled to the wiring box is located closer to the front than the portion where the arm is pivotally supported.

2. The floodlight according to claim 1.

3. The light source unit is connected to the wiring box by the connector, and the wiring box rotates around a pivot point where the wiring box is pivotally supported by the arm.

2. The floodlight according to claim 1.

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

2. The floodlight according to claim 1.

5. A plurality of heat dissipation fins extending in the vertical direction are provided on the rear surface of the light source unit, The connecting tools are provided on both sides of the wiring box in a width direction, and the through holes provided in the connecting tools are at least provided at positions facing each other, The direction in which the through holes face each other is perpendicular to the vertical direction in which the heat dissipation fins extend.

5. The floodlight according to claim 4.

6. The connector is disposed between the arm and the wiring box in the width direction of the wiring box.

2. The floodlight according to claim 1.

7. The connector has a first surface and a second surface different from the first surface, the first surface is overlapped and coupled to a surface of the wiring box; The second surface is superimposed on and coupled to the surface of the light source unit.

2. The floodlight according to claim 1.

8. the connector is a plate-like member, A bent portion is included between the first surface and the second surface.

8. The floodlight according to claim 7.

9. The first surface and the second surface intersect.

9. The floodlight according to claim 8.

10. The wiring box has a lid on the rear side.

2. The floodlight according to claim 1.

Images