Lighting device

Abstract

To provide a lighting device with improved installation flexibility. [Solution] The lighting device 10 comprises a housing 13 and an arm 12. The housing 13 has a front portion 16 having an opening 23 from which light is emitted, two opposing side portions 18 connected to the front portion 16, an upper portion 19 connected to the front portion 16, a lower portion 20 opposite to the upper portion 19, and a power supply housing portion 22 positioned on the front portion 16 side of the upper portion 19 so as to protrude in the direction opposite to the direction from the upper portion 19 to the lower portion 20. The amount of protrusion in the circumferential direction of the housing 13, including the two side portions 18, the upper portion 19 and the lower portion 20, is greatest in the direction of the upper portion 19. The arm 12 is angle-adjustable and mounted to connect the two side portions 18 of the housing 13.

Description

Technical Field

[0001] Embodiments of the present invention relate to lighting devices.

Background Art

[0002] Conventionally, in lighting devices such as spotlights used in studios, stages, etc., a light source may be arranged inside a housing, and a power supply unit for supplying lighting power to the light source may be disposed outside the housing.

[0003] In stages, studios, etc., multiple lighting devices may be installed adjacent to each other. However, since the power supply unit is disposed outside the lighting device, interference with adjacent lighting devices, etc. is likely to occur, and there may be a need for a lighting device with a high degree of installation freedom.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The problem to be solved by the present invention is to provide a lighting device with improved installation freedom. <�

Means for Solving the Problems

[0006] The lighting device of the embodiment comprises a housing and an arm. The housing has a front section having an opening from which light is emitted, two opposing side sections connected to the front section, a top section connected to the front section, a bottom section opposite to the top section, and a power supply housing section positioned on the front side of the top section so as to project in the opposite direction to the direction from the top section to the bottom section. The housing has the greatest projection in the circumferential direction, including the two side sections, the top section, and the bottom section, with the top section being the largest. The arm is angle-adjustable and mounted to connect the two side sections of the housing. [Effects of the Invention]

[0007] According to the lighting device of this embodiment, an improvement in installation flexibility can be expected. [Brief explanation of the drawing]

[0008] [Figure 1] This is a perspective view of a lighting device showing one embodiment. [Figure 2] This is a perspective view of the same lighting device. [Figure 3] This is a cross-sectional view of the same lighting device. [Figure 4] This is a cross-sectional view of the same lighting device. [Figure 5] This is a cross-sectional view showing the first power supply unit as seen from the front of the same lighting device. [Figure 6] This is a cross-sectional view showing the second power supply unit as seen from the rear of the same lighting device. [Figure 7] This is a cross-sectional view showing the attachment and detachment operation of the light distribution control member as seen from the front of the same lighting device. [Figure 8] This is a schematic side view showing multiple lighting devices installed adjacent to each other in the vertical direction. [Figure 9] This is a schematic plan view of a case where multiple of the above-mentioned lighting devices are installed adjacent to each other in the left-right direction. [Modes for carrying out the invention]

[0009] One embodiment will be described below with reference to the drawings.

[0010] Figures 1 and 2 show the lighting device 10. The lighting device 10 is a spotlight used in studios, stages, etc., that directs light towards the object to be illuminated. The spotlight may be a full-color spotlight capable of reproducing and projecting a wide range of colors on the chromaticity coordinate system, or it may be a spotlight that emits light of a single color. In the lighting device 10, the direction along the direction of light emission is defined as the front-to-back direction, and the up-down and left-to-right directions are defined as viewed from the front side of the light emission direction.

[0011] The lighting device 10 comprises a main body 11 and an arm 12 for suspending the main body 11 from a batten installed on the ceiling side of a studio or stage.

[0012] The main unit 11 includes a housing 13, and various components such as a light source, optical system, power supply, and mechanism are arranged inside this housing 13.

[0013] The arm 12 is arranged in a roughly U-shape, and both ends are attached to the left and right sides of the housing 13 so that their position in the front-to-back direction and angle in the up-to-down direction can be adjusted. The arm 12 is attached to the baton by a hanger, which is a suspension device connected to the middle of the arm 12, and suspends and supports the main body 11.

[0014] Figures 1 to 7 show the housing 13. The housing 13 comprises a main housing portion 21 having a front portion 16 facing the direction of light irradiation, a rear portion 17 opposite to the direction of light irradiation and facing the front portion 16, two opposing side portions 18 connected between the front portion 16 and the rear portion 17, an upper portion 19 connected between the front portion 16 and the rear portion 17, and a lower portion 20 connected between the front portion 16 and the rear portion 17 and facing the upper portion 19, and is formed in a rectangular parallelepiped shape that is elongated in the front-to-back direction corresponding to the direction of light irradiation. Furthermore, the housing 13 includes a power supply housing portion 22 positioned on the front side of the upper portion 19 so as to protrude in the direction opposite to the direction from the upper portion 19 to the lower portion 20. As a result, the amount of protrusion in the circumferential direction that intersects the front-to-back direction of the housing 13, including the two side portions 18, the upper portion 19 and the lower portion 20, is greatest in the direction of the upper portion 19.

[0015] On the front surface portion 16 of the housing 13, a circular opening 23 is provided through which light is emitted forward from the inside of the housing 13. On the front surface portion 16 of the housing 13, a mounting unit 24 for attaching optical components such as an optical filter like a color filter and a band aperture for limiting the light irradiation range is disposed.

[0016] On the side surface portion 18, a pair of upper and lower mounting rails 25 for movably attaching the arm 12 along the front - rear direction are disposed. The mounting rail 25 has a rail portion 26 (refer to FIG. 5 etc.) in a substantially L - shaped cross - section that rises substantially vertically from the side surface portion 18 and is bent in a direction in which the pair of mounting rails 25 face each other.

[0017] On the upper surface portion 19 and the lower surface portion 20, heat - radiation ventilation holes 27 and 28 are provided in regions facing the second power supply unit 54 and the radiator 57 of the light source unit 50, which will be described later, respectively.

[0018] As shown in FIG. 2, on the rear surface portion 17 of the housing 13, a handle portion 31 for transportation, installation, and angle adjustment operations is attached along the width direction of the rear surface portion 17. Further, on the rear surface portion 17, a heat - radiation ventilation hole 32 is provided on the upper side, a power input portion 33 to which a power cable for supplying alternating current is connected on the lower side, a power output portion 34 for sending out the alternating current input to this power input portion 33 to the outside, a signal input portion 35 to which a signal cable for transmitting a dimming or control signal such as a DMX signal is connected, a signal output portion 36 for sending out the signal input to this signal input portion 35 to the outside, an adjustment portion 37 for adjusting the light irradiated to the light irradiation target (for example, the size of the irradiation range of the light), and a display operation portion 38 having an operation portion for performing various settings of the lighting device 10 and a display portion for displaying the setting status and state of the lighting device 10 are provided. The display operation portion 38 is covered with an openable and closable lid body 39.

[0019] The power supply housing portion 22 is disposed on the front side of the ventilation holes 27 and 28 of the upper surface portion 19. The power supply housing portion 22 includes an upper surface covering portion 40 facing the upper surface portion 19, side surface covering portions 41 bent from both left and right sides of the upper surface covering portion 40 and attached to the side surface portion 18, a front surface covering portion 42 formed by extending the front surface portion 16 upward, and a rear surface covering portion 43 covering the rear surface between the upper surface covering portion 40, the side surface covering portions 41, and the upper surface portion 19, and forms a housing space 44 for housing a power supply (first power supply portion 53) between it and the upper surface portion 19. A groove portion 45 is formed in the central portion in the left-right direction of the upper surface covering portion 40 along the front-rear direction. A partition portion 46 for partitioning the housing space 44 in the left-right direction is disposed between the upper surface covering portion 40 and the upper surface portion 19. The partition portion 46 is formed in a substantially U-shaped cross-section in the left-right direction, both end portions are fixed to the upper surface portion 19 on both sides of the groove portion 45, and the inner space between both end portions communicates with the groove portion 45 of the upper surface portion 19.

[0020] In addition, ventilation holes for heat dissipation may be provided on each surface of the power supply housing portion 22. Also, it is preferable that the front surface covering portion 42 of the power supply housing portion 22 is arranged flush with the front surface portion 16 of the housing 13, but it is not limited to this form. For example, the front surface covering portion 42 of the power supply housing portion 22 may be arranged to be located in front of or behind the front surface portion 16 of the housing 13.

[0021] Also, as shown in FIGS. 3 and 4, in the housing 13, a light source portion 50, an optical system 51 arranged along the forward light irradiation direction from this light source portion 50, a sliding mechanism 52 for sliding a part of this optical system 51 in the forward direction which is the light irradiation direction or the backward direction opposite to the forward direction, and a first power supply portion 53 and a second power supply portion 54 which are power supplies for driving the light source portion 50 to light are arranged.

[0022] The light source portion 50 is fixedly arranged on the rear side of the central portion in the front-rear direction within the housing 13. The light source portion 50 includes a light source 56 and a radiator 57 disposed on the front side of this light source 56.

[0023] The light source 56 is composed of a light source module comprising a light source substrate 58 and multiple types of light-emitting elements 59, such as LEDs, mounted on the light source substrate 58.

[0024] The light source substrate 58 is divided into multiple sections and combined into a single light source substrate 58, for example, in a polygonal shape such as a hexagon or in a circular shape. The light source substrate 58 is a single-layer substrate or a single-sided substrate and comprises a base plate made of a metal material such as aluminum, a resin material such as glass epoxy, or an inorganic material such as aluminum oxide or aluminum nitride, and a plurality of wiring patterns on the front side of the base plate, configured so that a plurality of light-emitting elements can be lit in different systems for each type. Each wiring pattern includes a plurality of mounting pads for mounting each light-emitting element, and a wiring pattern section that connects the mounting pads for each type of light-emitting element in series or in series-parallel and is connected to a connection connector, which is a connection terminal section provided in the peripheral area on the front side of the light source substrate 58. The wiring pattern sections are routed between the plurality of mounting pads or along the peripheral area of ​​the light source substrate 58, but if there are intersections where some wiring pattern sections cross, an upper wiring pattern section is provided that crosses the jumper insulating layer provided on the lower wiring pattern section at the intersection, thereby insulating the wiring pattern sections from each other.

[0025] In this embodiment, the light source substrate 58 is provided with, for example, four systems (four parallel circuit patterns), and the light source substrate 58 is provided with four pairs of wiring patterns (one pair of wiring patterns consists of an anode wiring pattern and a cathode wiring pattern, and there are four such pairs of wiring patterns) and four connection connectors. Each connection connector has an input port to the system connected to the connector and an output port from the system connected to the connector. The input port is electrically connected to the anode wiring pattern of the system, and the output port is electrically connected to the cathode wiring pattern of the system. Note that the number of systems is not limited to four, but may be four or more systems for each different color (for example, eight systems), or there may be two or more systems of the same color, for example, red. Also, the input port and output port of the connection connector may be configured as separate components.

[0026] The light-emitting element 59 is mounted within a circular mounting area of ​​a predetermined radius from the center of the light source substrate 58. The light-emitting element 59 is, for example, an SMD (Surface Mount Device) package type or a CSP (Chip Scale Package) type light-emitting element, and is connected to the mounting pads of the wiring pattern on the light source substrate 58 by soldering, and emits light when lighting power is supplied from the second power supply unit 54 through the wiring pattern. The light-emitting element 59 may have a lens portion disposed on the light-emitting surface. In this case, the resin material that is the sealing member of the light-emitting element 59 may be made convex in the direction of light irradiation to form a lens portion, thereby functioning as a lens portion.

[0027] The light-emitting elements 59 can be white, red, green, blue, cyan, or other light-emitting elements. Furthermore, light-emitting elements 59 containing phosphors that emit bright green, yellow, or bluish-green (mint color) light, or amber-colored light, may also be used. The light-emitting elements 59 of each color are arranged on the light source substrate 58 with consideration for color mixing. Note that multiple light-emitting elements 59 may be used, each emitting a single color of light, or multi-color light-emitting elements capable of individually emitting multiple colors may be used. The second power supply unit 54 supplies lighting power to the light-emitting elements 59 of each color system according to the color of the irradiated light, and the light-emitting elements 59 of each color system are lit.

[0028] The heat sink 57 is made of a metal such as aluminum, and has multiple fins 60 protruding from its rear side in the vertical direction. The upper and lower sides of the heat sink 57 face the ventilation holes 28 of the upper and lower portions 19 and 20 of the housing 13, as well as the ventilation holes 32 of the rear portion 17. The heat sink 57 has a light source 56 and part of the optical system 51 attached to its front side. The light source 56 is mounted such that the back side of the light source substrate 58 is in direct or indirect surface contact with the front side of the heat sink 57 for thermal connection. Indirect connection here means that a heat dissipation sheet or thermal grease is interposed between the light source 56 and the heat sink 57.

[0029] Furthermore, the optical system 51 refracts each of the lights from the light-emitting elements 59 and includes a first lens 63 having multiple collimator lenses, for example, which refract each of the lights from the light-emitting elements 59 into parallel light parallel to the optical axis in the forward direction; a second lens 64, which is a condensing lens such as a Fresnel lens, that receives the light refracted by the first lens 63 and focuses it at a predetermined condensing position; an aperture frame 66 having a predetermined circular aperture 65 through which light passes; a diffuser plate 67, which is an optical element attached to the aperture frame 66 near the condensing position of the second lens 64, that receives the light focused by the second lens 64, diffuses it, and mixes the colors; a light distribution control member 69 having a light distribution control hole 68 positioned on the front side, which is the output side through which light passes through the aperture 65; and a projection lens 70 that receives the light that has been diffused by the diffuser plate 67 and passed through the aperture 65 and the light distribution control hole 68, and irradiates it in the direction of light irradiation. The direction of the optical axis is approximately the same as the direction in which light is emitted from the light-emitting element 59 with the highest intensity.

[0030] Furthermore, the optical system 51 includes a light-shielding plate 71 mounted in an intermediate position between the front section 16 and the light source section 50 within the housing 13, with an aperture frame 66 attached to its rear side; a light-shielding frame member 72 that covers the periphery of the light source 56, the first lens 63 and the second lens 64 and is mounted on the front side of the heat sink 57; and a cylindrical member 73 positioned between the light-shielding frame member 72 and the aperture frame 66, which guides the light from the second lens 64 to the diffuser plate 67.

[0031] In the optical system 51, the first lens 63, second lens 64, cylindrical member 73, aperture 65, diffuser plate 67, light distribution control member 69, and projection lens 70 are arranged in order from the light source 56 side toward the direction of light irradiation, with the optical axis as the center. The first lens 63, second lens 64, aperture 65, diffuser plate 67, light distribution control member 69, and cylindrical member 73 are fixedly arranged within the housing 13, while the projection lens 70 is slidably arranged in the front-rear direction within the housing 13. Note that the optical system 51 described above is just one example and is not limited to the above-described configuration.

[0032] As shown in Figures 3, 4, and 7, the light distribution control member 69 is provided as a vertically elongated flat plate with a light distribution control hole 68 opening in the center, and a hook portion 74 is bent at the upper end. Multiple types of light distribution control members 69 with different hole diameters for the light distribution control hole 68 are available to correspond to the type of light distribution, and are used selectively according to the lighting conditions. The light distribution control member 69 can be attached to and detached from the front side of the light shield plate 71 through a slit-shaped attachment / detachment opening 75 provided on the upper surface 19 of the housing 13. A pair of guide members 78 are attached to the front side of the light shield plate 71 to guide both the left and right sides of the light distribution control member 69 so that it can move vertically, and to position the light distribution control member 69 vertically by contacting the lower part of the light distribution control member 69. Furthermore, a cover member 79 is attached to the front side of the light shield plate 71, covering the area around the lower side of the attachment / detachment opening 75 between the light shield plate 71 and the cover member 79.

[0033] A cover 80 is positioned on the upper surface of the upper portion 19 to close the attachment / detachment opening 75 and to press down on the upper side of the light distribution control member 69 inserted into the attachment / detachment opening 75. The cover 80 can be opened and closed by a hinge 81 and is biased in the closing direction by gravity or a spring incorporated into the hinge.

[0034] As shown in Figures 3 and 4, the projection lens 70 is mounted on a lens retaining frame 82 and positioned within the housing 13 by the lens retaining frame 82. A sliding portion 83 is provided at the lower part of the lens retaining frame 82, and the sliding portion 83 is positioned to be movable in the front-rear direction on a sliding guide member 84 disposed on the lower surface 20 of the housing 13. On both the left and right sides of the sliding guide member 84, there are sliding guide portions 85 bent into a roughly U-shape, on which the left and right sides of the sliding portion 83 are positioned. The lens retaining frame 82 is positioned to be slidable parallel to the front-rear direction along the sliding guide member 84.

[0035] The cylindrical member 73 is a light-shielding member that guides light from the second lens 64 to the diffuser plate 67 and prevents light from leaking to the outside through the ventilation holes 27 and 28 of the housing 13. The cylindrical member 73 is formed in a truncated cone shape such that its width (diameter) decreases towards the front side of the housing 13. The cylindrical member 73 is preferably made of a metal such as aluminum and is not painted or otherwise treated to suppress heat absorption. Between the cylindrical member 73 and the top surface 19, side surface 18, and bottom surface 20 of the housing 13, there are respective housing spaces 86 for housing the second power supply unit 54. These housing spaces 86 are formed such that the space between the cylindrical member 73 and the inner surface of the housing 13 widens from the rear side to the front side, corresponding to the inclination of the cylindrical member 73 in the front-rear direction.

[0036] Furthermore, the sliding mechanism 52 includes a sliding feed shaft 89 located on one side of the bottom of the housing 13 (the left side when viewed from the front portion 16 of the housing 13), with its axial direction aligned with the front-rear direction of the housing 13, and a sliding feed member 90 that is slidably engaged with the sliding feed shaft 89 along the axial direction.

[0037] The sliding feed shaft 89 is cylindrical in shape, with a helical feed groove formed on its circumferential surface. The front end of the sliding feed shaft 89 is rotatably supported by a bearing member (not shown) located on the front side of the housing 13, and the rear end is rotatably supported by the rear surface portion 17. The rear end of the sliding feed shaft 89 protrudes rearward from the rear surface portion 17, and an adjustment part 37, such as a handle for rotating the sliding feed shaft 89, is attached to it.

[0038] The sliding feed member 90 is inserted so as to be rotatable and axially slidable on the sliding feed shaft 89 and is engaged with the feed groove of the sliding feed shaft 89. The sliding feed member 90 is connected to the lens holding frame 82 and slides forward or backward together with the lens holding frame 82 as the sliding feed shaft 89 rotates.

[0039] Furthermore, as shown in Figures 3, 4, and 5, two first power supply units 53 are used and are arranged side by side in the left-right direction within the power supply housing 22. The first power supply unit 53 consists of an AC-DC converter that converts AC power supplied to the lighting device 10 from an external source into predetermined DC power and supplies it to the second power supply unit 54. The first power supply unit 53 is configured by mounting multiple power supply components 94 on a power supply board 93. The first power supply unit 53 is housed in each housing space 44 partitioned by a partition wall 46 within the power supply housing 22, with the surface of the power supply board 93 on which the large power supply components 94 are arranged facing the top cover portion 40 of the power supply housing 22, and is attached to the top surface portion 19 of the housing 13.

[0040] As shown in Figures 3, 4, and 6, four second power supply units 54 are used, one for each of the four systems of the light source 56, and are arranged in the space between the two side portions 18, the top portion 19, and the bottom portion 20 of the housing 13. The second power supply unit 54 consists of a DC-DC converter that converts the DC power supplied from the first power supply unit 53 into a predetermined DC power, which is lighting power, and supplies it to the light source 56. The second power supply unit 54 is configured by mounting multiple power supply components 96 on a power supply board 95 and is housed in a power supply case 97. The second power supply unit 54 is arranged in the housing space 86 between each side portion 18 of the housing 13 and the cylindrical member 73, between the top portion 19 and the cylindrical member 73, between the bottom portion 20 and the cylindrical member 73, and between the light source 56 and the optical component, which is the diffuser plate 67. The second power supply unit 54 is mounted with the power supply board 95, on which the large power supply components 96 are placed, facing the cylindrical member 73 at the center of the housing 13, and the power supply case 97 is attached to the rear side of the light shielding plate 71. The second power supply unit 54, mounted to the rear side of the light shielding plate 71, is positioned away from the two side portions 18, the top portion 19, and the bottom portion 20 of the housing 13, as well as the cylindrical member 73, without making contact.

[0041] One of the two first power supply units 53 is electrically connected to two of the four second power supply units 54 by wires routed within the housing 13, and the DC power converted by the first power supply unit 53 is supplied to the second power supply unit 54. The other of the two first power supply units 53 is electrically connected to the remaining two second power supply units 54 by wires routed within the housing 13, and the DC power converted by the first power supply unit 53 is supplied to the second power supply unit 54. The wires connecting the first power supply unit 53 and the second power supply unit 54 are routed in a position that does not interfere with the lens holding frame 82 which moves in the front-rear direction within the housing 13. In addition, each second power supply unit 54 for each system is connected to the light source 56 for each system by wires routed within the housing 13, and the lighting power from each second power supply unit 54 for each system is supplied to the light-emitting element 59 of the light source 56 for each system.

[0042] Furthermore, a noise filter 99 is positioned between the rear surface 17 of the housing 13 and the heat sink 57. The power input unit 33 is electrically connected to the input side of the noise filter 99, and the output side of the noise filter 99 is electrically connected to the first power supply unit 53 by wires routed inside the housing 13. The noise filter 99 reduces noise that is input to or output from the AC power supplied by the power cable connected to the power input unit 33.

[0043] Furthermore, the signal input unit 35 located on the rear surface 17 of the housing 13 and the control unit of the display operation unit 38 are electrically connected. The control unit of the display operation unit 38 and the second power supply unit 54 are electrically connected by a signal line such as a coaxial cable, and signals such as dimming signals input to the signal input unit 35 are transmitted to the second power supply unit 54.

[0044] Furthermore, as shown in Figures 5 to 7, both ends of the arm 12 are attached to the sides 18 of the housing 13 by a connecting mechanism 101 so that their position in the front-rear direction and angle in the up-down direction can be adjusted, respectively. The connecting mechanism 101 has a retaining member 102 which is positioned between the rail portions 26 of a pair of upper and lower mounting rails 25 attached to the sides 18 of the housing 13 and is movable in the front-rear direction, a connecting member 103 which is positioned on the outer side of the pair of upper and lower mounting rails 25 and whose upper and lower parts are positioned above and below the upper and lower rail portions 26 so that it is movable in the front-rear direction, and screws 104 and 105 which are screwed into the retaining member through the connecting member 103, and is moved in the front-rear direction along the mounting rails 25 with the screw 105 loosened, and is fixed by tightening the screw 105. One end of the arm 12 is rotatably attached to the connecting member 103 by a support 106, and the other end of the arm 12 is attached to the connecting member 103 by a screw with a handle 107. With the handle-equipped screw 107 loosened, the angle of the main body 11 can be adjusted relative to the arm 12, and the main body 11 is fixed to the arm 12 by tightening the handle-equipped screw 107.

[0045] In the lighting device 10, according to the color of the light being irradiated, the second power supply unit 54 for each color system supplies lighting power to the light-emitting elements 59 of the light source 56, and the light-emitting elements 59 of each color system are lit. The light from the lit light-emitting elements 59 is emitted as parallel light mainly parallel to the optical axis by the first lens 63, which is a collimator lens, and is focused by the second lens 64 toward the effective area of ​​the diffuser plate 71 facing the aperture 65. The light of each color is mixed by the diffuser plate 71 to generate a pseudo-light source, and the light from this pseudo-light source generated by the diffuser plate 71 is irradiated onto the object to be illuminated by the projection lens 70 through the aperture 65 and the light distribution control hole 68.

[0046] Between the heat sink 57 fixed inside the housing 13 and the light shield plate 71, the light source 56, the first lens 63, the second lens 64, and the diffuser plate 67 are covered by the light shield frame member 72 and the cylindrical member 73, thereby suppressing the leakage of light emitted by the light-emitting element 59 of the light source 56 to the outside through the ventilation holes 27, 28 provided on the upper and lower surfaces of the housing 13 and the ventilation hole 32 on the rear surface.

[0047] Furthermore, by rotating the handle, which is the adjustment unit 37, the projection lens 70 slides forward or backward by the sliding mechanism 52, changing the distance between the diffuser plate 67 that generates the pseudo-light source and the projection lens 70, thereby adjusting the range of the illuminated light.

[0048] The light distribution emitted from the lighting device 10 corresponds to the dimensions of the pseudo-light source generated on the diffuser plate 71 by the aperture 65. However, when changing or adjusting the light distribution, a light distribution control member 69 having a light distribution control hole 68 with a smaller diameter than the aperture 65 is used to adjust the dimensions of the pseudo-light source generated on the diffuser plate 71. The light distribution control member 69 can be attached or replaced through an attachment / detachment opening 75 provided on the upper surface 19 of the housing 13, allowing for easy adjustment of the light distribution.

[0049] Furthermore, the heat generated when the light source 56 is lit is transferred to the heat sink 57 and dissipated into the air from the heat sink 57. Since the ventilation holes 28 of the housing 13 are located opposite each other in the vertical direction of the heat sink 57, the airflow due to convection caused by the temperature rise of the heat sink 57 is smooth, the heat dissipation effect from the heat sink 57 is high, and the temperature rise of the light source 56 is suppressed.

[0050] Since the two first power supply units 53 are separated by a partition wall 46 and housed in the power supply housing 22, the interaction of heat generated by the two first power supply units 53 during operation is suppressed. Furthermore, the partition wall 46 has a roughly U-shaped cross-section, and the space between both ends of the partition wall 46 communicates with a groove 45 opened in the upper cover portion 40 of the power supply housing 22. As a result, the heat dissipation effect from the first power supply units 53 that is transmitted to the partition wall 46 is high, and the temperature rise of the first power supply units 53 is suppressed.

[0051] Since ventilation holes 27 are provided above and below the housing space 86 in the enclosure 13 where the second power supply unit 54 is located, facing the second power supply unit 54 which is positioned vertically, the airflow due to convection caused by the temperature rise when the second power supply unit 54 is operating is smooth, the heat dissipation effect from the second power supply unit 54 is high, and the temperature rise of the second power supply unit 54 is suppressed.

[0052] Furthermore, lighting equipment 10 is often installed at a high position in studios or stages, and is frequently installed adjacent to other lighting equipment both vertically and horizontally.

[0053] For example, as shown in Figure 8, a schematic side view of a case where multiple lighting devices 10 are installed adjacent to each other in the vertical direction, the orientation of the lighting devices 10 is often adjusted in the vertical direction so that the light irradiation direction facing the front portion 16 is tilted downwards. There is a concern that the lower portion 20 of the housing 13 may interfere with the hanger 112 of the suspension device that suspends the lower lighting device 10 from the lower batten 111. However, since the amount of protrusion of the lower portion 20 of the housing 13 is smaller than the amount of protrusion of the upper portion 19 from which the power supply housing portion 22 protrudes, vertical interference is suppressed, resulting in a wider range of motion in the vertical direction and greater freedom of installation. Furthermore, when adjusting the orientation of the lighting devices 10 in the horizontal direction, the amount of protrusion of the side portion 18 of the housing 13 is smaller than the amount of protrusion of the upper portion 19 from which the power supply housing portion 22 protrudes, thus suppressing interference of the lighting devices 10 in the horizontal direction, resulting in a wider range of motion in the horizontal direction and greater freedom of installation.

[0054] Since the arm 12 is provided so as to be slidable in the front-rear direction along the side portion 18 of the main body 11, the degree of freedom in installation is increased by adjusting the front-rear positional relationship between the arm 12 and the main body 11. For example, as shown in the schematic plan view of a case where multiple lighting devices 10 are installed adjacent to each other in the left-right direction in Figure 9 (the dashed line in Figure 9 indicates the central axis of the batten 111), if the front-rear positional relationship between the arm 12 and the main body 11 is fixed, attempting to adjust the left-right orientation of the lighting devices 10 will result in interference between adjacent lighting devices 10, narrowing the range of motion in the left-right direction. However, by adjusting the position of the main body 11 in the rearward direction relative to the arm 12, the range of motion of the main body 11 in the left-right direction is widened, increasing the degree of freedom in installation.

[0055] Furthermore, in the lighting device 10 of this embodiment, since the power supply housing 22 is located only on the upper side of the housing 13, interference with other fixtures adjacent to the left and right can be suppressed, as can interference with hangers that suspend other fixtures installed below. This expands the range of motion of the lighting device 10 even when different fixtures and hangers are adjacent in the left-right and up-down directions, thereby improving the flexibility of the installation of the lighting device 10.

[0056] The first power supply unit 53 is located in the power supply housing section 22 of the housing 13, and the second power supply unit 54 is located in the space between the upper surface 19 and the lower surface 20 of the housing 13. Because the first power supply unit 53 and the second power supply unit 54 are distributed, the power supply housing section 22 can be made smaller, the amount of protrusion from the upper surface 19 can be reduced, and furthermore, the heat can be dispersed, suppressing the occurrence of temperature concentration.

[0057] The second power supply unit 54 is positioned within the housing 13 between the light source 56 and the diffuser plate 67, which is an optical component, and also between the cylindrical member 73, which is positioned between the light source 56 and the diffuser plate 67, and the housing 13. Therefore, it can be positioned in a way that makes effective use of the limited space within the housing 13, and the housing 13 does not become larger.

[0058] Since the cylindrical member 73 has a shape in which its width decreases towards the front of the housing 13, the space between the cylindrical member 73 and the housing 13 increases towards the front, making it possible to secure space for arranging the second power supply unit 54.

[0059] Since the arm 12 is provided so as to be slidable in the front-rear direction along the side portion 18, the degree of freedom in installing the lighting device 10 can be improved.

[0060] The first power supply unit 53 may be placed in the storage space 86 sandwiched between the upper and lower surfaces 19 and 20 of the housing 13, and the second power supply unit 54 may be placed in the power supply housing 22. Alternatively, if the number of color circuits of the light source 56 is small, both the first power supply unit 53 and the second power supply unit 54 may be placed in the power supply housing 22.

[0061] Alternatively, the position of the projection lens 70 may be fixed, while the light source unit 50 can be moved in the front-to-back direction. In this case, when the projection lens 70 and the light source unit 50 are brought close together to achieve a wide-angle light distribution, the light projected by the projection lens 70 will not be obstructed by the housing 13, thereby improving the light emission efficiency.

[0062] While several embodiments of the present invention have been described, these embodiments are presented as examples only and are not intended to limit the scope of the invention. These novel embodiments can be carried out in a variety of other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims of the invention and its equivalents. [Explanation of Symbols]

[0063] 10 Lighting devices 12 arms 13 cabinets 16 Front part 18 Side part 19 Top part 20 Bottom part 22 Power supply enclosure 23 Aperture 53 1st power supply section 54 2nd power supply section 56 Light source 67 Diffuser plate, an optical component 73. Cylindrical member

Claims

1. A front section having an opening from which light is emitted, Two opposing side portions connected to the aforementioned front portion, The upper part connected to the front part, The lower portion facing the upper portion, It has a power supply housing portion that is positioned on the front side of the upper portion so as to protrude in a direction opposite to the direction from the upper portion toward the lower portion, The amount of protrusion in the circumferential direction, including the two side portions, the top portion, and the bottom portion, is greatest in the direction of the top portion of the housing; An arm that is angle-adjustable and mounted to connect the two side portions of the housing; A lighting device characterized by having the following features.

2. The first power supply unit is located in the aforementioned power supply housing; The housing comprises: a second power supply unit disposed in the space between the upper and lower portions of the housing; The lighting device according to feature 1.

3. A light source arranged within the aforementioned housing; The optical member is positioned opposite the opening; The second power supply unit is positioned between the light source and the optical element. The lighting device according to feature 2.

4. The light source and the optical member are positioned between them and a cylindrical member that guides the light from the light source to the optical member, The second power supply unit is positioned between the housing and the cylindrical member. The lighting device according to feature 3.

5. The cylindrical member has a shape in which its width decreases towards the front of the housing. The lighting device according to feature 4.

6. The arm is provided so as to be slidable in the front-rear direction along the side portion. A lighting device according to any one of claims 1 to 5.

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