Lighting device

Abstract

To provide a lighting device which enables stable improvement of heat radiation performance of a heat radiation block regardless of a position of a light source unit.SOLUTION: A lighting device A1 includes a light source unit 2 and a housing 1. The housing 1 houses the light source unit 2. The light source unit 2 includes an attachment plate 21, a light source 20, a heat radiation block 22, and a blower 24. The attachment plate 21 has a first major surface and a second major surface facing each other. The light source 20 is disposed on the first major surface of the attachment plate 21. The heat radiation block 22 is disposed on the second major surface of the attachment plate 21. The blower 24 is disposed at the opposite side of the attachment plate 21 in the heat radiation block 22. The light source unit 2 may move in a first direction, a direction in which the attachment plate 21, the light source 20, the heat radiation block 22, and the blower 24 are arranged, relative to the housing 1.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present disclosure relates to a lighting device, and more particularly to a lighting device provided with a blower for exhausting hot air from a heat dissipation block.

Background Art

[0002] Conventionally, in stage lighting such as stage lighting and studio lighting in television stations, a lighting device, so-called a spotlight, suspended from a baton (suspension pipe) installed at a high place on the stage and studio has been used (see, for example, Patent Document 1).

[0003] The lighting device described in Patent Document 1 includes a light source unit (light source unit) and a housing that houses the light source unit movably along a sliding axis. The light source unit includes a light source and a heat dissipation block.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the above conventional lighting device, in order to improve the heat dissipation performance of the heat dissipation block, it is desirable to further include a blower for exhausting the hot air of the heat dissipation block. In this case, if the blower is fixed to the housing, the distance between the heat dissipation block and the blower changes as the light source unit (light source unit) moves, so that the heat dissipation performance of the heat dissipation block cannot be stably improved.

[0006] An object of the present disclosure is to provide a lighting device capable of stably improving the heat dissipation performance of a heat dissipation block regardless of the position of a light source unit.

Means for Solving the Problems

[0007] A lighting device according to one aspect of the present disclosure comprises a light source unit and a housing. The housing houses the light source unit. The light source unit comprises a mounting plate, a light source, a heat dissipation block, a blower, Partition members and The mounting plate has a first main surface and a second main surface facing each other. The light source is positioned on the first main surface of the mounting plate. The heat dissipation block is positioned on the second main surface of the mounting plate. The blower is positioned on the surface of the heat dissipation block opposite to the mounting plate. The partition member divides the internal space of the housing into a first space on the side of the light source and a second space on the side of the heat dissipation block. The light source unit is movable relative to the housing in a first direction in which the mounting plate, the light source, the heat dissipation block, and the blower are aligned. The partition member has light-shielding properties. The partition member and the mounting plate each have thermal conductivity. The partition member is in contact with the mounting plate. The housing has thermal conductivity. The partition member is in contact with the housing in a manner that allows it to move relative to the housing. [Effects of the Invention]

[0008] The lighting device disclosed herein has the effect of stably improving the heat dissipation performance of the heat dissipation block regardless of the position of the light source unit. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1 is a perspective view of a lighting device according to an embodiment of this disclosure, viewed from the front. [Figure 2] Figure 2 is a perspective view of the same lighting device as shown above, seen from the rear. [Figure 3] Figure 3 is a cross-sectional view taken along line III-III in Figure 1. [Figure 4] Figure 4 is a perspective view of the light source unit and adjustment unit in the same lighting device, viewed from the front. [Figure 5] Figure 5 is a rear view of the same light source unit and adjustment unit. [Figure 6] Figure 6A is an explanatory diagram illustrating the movable area, the first area, and the second area in the housing of the lighting device described above. Figure 6B is an explanatory diagram illustrating the positional relationship between the light source unit and the first area. Figure 6C is an explanatory diagram illustrating the positional relationship between the light source unit and the second area. [Figure 7] Figure 7 is a cross-sectional view taken along line VII-VII in Figure 4. [Figure 8] Figure 8 is a rear view of the heat dissipation block and blower of the lighting device shown above, viewed from the rear. [Figure 9] Figure 9 is an explanatory diagram illustrating the operation of the lighting device when the light source unit is in the first position. [Figure 10] Figure 10 is an explanatory diagram illustrating the operation of the lighting device when the light source unit is in the second position. [Figure 11] Figure 11 is a cross-sectional view of the light source unit and adjustment unit in a modified example. [Modes for carrying out the invention]

[0010] Hereinafter, a lighting device A1 according to an embodiment of this disclosure will be described in detail with reference to the drawings. However, the figures described in the following embodiments are schematic diagrams, and the ratios of the size and thickness of each component do not necessarily reflect the actual dimensional ratios. Furthermore, the configuration described in the following embodiments is merely one example of this disclosure. This disclosure is not limited to the following embodiments, and various modifications are possible depending on the design, etc., as long as the effects of this disclosure can be achieved.

[0011] (1) Overview As shown in Figure 3, the lighting device A1 according to the embodiment comprises a light source unit 2 and a housing 1. The housing 1 houses the light source unit 2. The light source unit 2 comprises a mounting plate 21, an LED module 20 (light source), a heat dissipation block 22, and a blower 24. The mounting plate 21 has a front surface (first main surface) and a rear surface (second main surface) that face each other. The LED module 20 is positioned on the front surface of the mounting plate 21. The heat dissipation block 22 is positioned on the rear surface of the mounting plate 21. The blower 24 is positioned on the heat dissipation block 22 opposite to the mounting plate 21. The light source unit 2 is movable relative to the housing 1 in the front-to-back direction (first direction), which is the direction in which the mounting plate 21, LED module 20, heat dissipation block 22, and blower 24 are aligned.

[0012] According to this configuration, since the blower 24 and the heat dissipation block 22 move together, the distance between the heat dissipation block 22 and the blower 24 can be kept constant with respect to the movement of the light source unit 2. As a result, the heat dissipation performance of the heat dissipation block 22 can be stably improved by the blower 24 regardless of the position of the light source unit 2.

[0013] (2) Overall configuration The lighting device A1 according to the embodiment is a so-called spotlight suitable for stage lighting, studio lighting of television stations, and other production lighting. However, the lighting device A1 is not limited to a spotlight, and may be, for example, a lighting device other than a spotlight such as a projector.

[0014] As shown in FIGS. 1 and 3, the lighting device A1 includes a housing 1, a light source unit 2, a lens 3, an adjustment unit 4, an arm block 5, a power supply block 6, a circuit block 7, and the like.

[0015] In the following description, the up-down, front-back, and left-right directions indicated by arrows in FIG. 1 and the like are defined as the up-down, front-back, and left-right directions of the lighting device A1. However, the up-down, front-back, and left-right directions of the lighting device A1 are directions defined for convenience of explanation and do not limit the directions when the lighting device A1 is actually used.

[0016] The front-back direction of the lighting device A1 is, as described later, the moving direction of the light source unit 2 (that is, the direction (the first direction) in which the LED module 20 (light source), the mounting plate 21, the heat dissipation block 22, and the blower 24 are arranged). The front side of the lighting device A1 is the side that emits illumination light (light source light) in the lighting device A1. The left-right direction of the lighting device A1 is the horizontal direction (that is, the horizontal direction orthogonal to the front-back direction of the lighting device A1) of the lighting device A1. The up-down direction of the lighting device A1 is the direction orthogonal to both the front-back direction (the first direction) and the left-right direction (the horizontal direction) of the lighting device A1.

[0017] (2-1) Light source unit As shown in Figures 4 and 5, the light source unit 2 is a unit that emits illumination light (light source light) from the lighting device A1. The light source unit 2 includes an LED module 20 (light source, see Figure 3), a mounting plate 21, a heat dissipation block 22, an optical component 23, a blower 24, a partition member 25, and the like. The LED module 20, mounting plate 21, heat dissipation block 22, optical component 23, blower 24, and partition member 25 are fixed together as a single unit.

[0018] The LED module 20 (see Figure 3) is a so-called COB (Chip On Board) type LED module in which multiple LED chips are mounted on one surface of a roughly square substrate, and these multiple LED chips are sealed with a sealing resin. The multiple LED chips may all be the same color (for example, white), or they may include multiple LED chips of two or more colors (for example, warm white and cool white, or the three primary colors of RGB). The LED module 20 may also be composed of multiple package-type LEDs mounted on a substrate.

[0019] The mounting plate 21 is a component to which the LED module 20 and the heat dissipation block 22 are attached. The mounting plate 21 is formed in the shape of a rectangular flat plate, for example, from aluminum or an aluminum alloy. The mounting plate 21 has a front surface (first main surface) and a rear surface (second main surface) that face each other in the thickness direction (front-to-back direction) of the mounting plate 21. The LED module 20 is placed on the front surface of the mounting plate 21, and the heat dissipation block 22 is placed on the rear surface of the mounting plate 21.

[0020] The heat dissipation block 22 is a component for dissipating the heat generated by the LED module 20. The heat dissipation block 22 has multiple (16 in the illustrated example) heat sinks 221 of the same shape and size, and multiple (4 in the illustrated example) heat pipes 222 (see Figure 4). The heat sinks 221 are formed in the shape of thin rectangular plates from aluminum or an aluminum alloy. The multiple heat sinks 221 are arranged with their thickness direction aligned in the left-right direction, spaced apart from each other (i.e., with a gap Q1), and are formed to protrude rearward from the rear surface of the mounting plate 21 (i.e., protrude from the mounting plate 21 side towards the blower 24 side). The multiple heat sinks 221 are parallel to each other.

[0021] Each of the multiple heat pipes 222 is formed in a U-shape. One end of each heat pipe 222 is joined (thermally bonded) to the rear surface of the mounting plate 21 so that it is partially embedded (see Figure 3). The other end of the heat pipe 222 is configured to penetrate and thermally bond with the multiple heat sinks 221 (see Figure 5). In other words, the heat generated by the LED module 20 is dissipated by direct conduction from the mounting plate 21 to the heat sinks 221, and simultaneously by conduction to the heat sinks 221 via the heat pipes 222.

[0022] The optical component 23 is formed, for example, in a cylindrical shape from a transparent material (e.g., glass or resin). The optical component 23 is configured to focus the light emitted from the LED module 20. The optical component 23 is fixed to the front of the LED module 20 (i.e., the light source unit 2) by a support member 231 so that its optical axis (i.e., the column axis) aligns with the optical axis of the LED module 20.

[0023] The blower 24 is positioned on the rear side of the heat dissipation block 22 (i.e., on the rear side of the multiple heat sinks 221) and exhausts the hot air accumulated in the gap Q1 between the multiple heat sinks 221. The rear side of the heat dissipation block 22 is the side opposite to the mounting plate 21 on the heat dissipation block 22. In this embodiment, the blower 24 is fixed to the rear surface 22a of the heat dissipation block 22, for example, by screws. The blower 24 may also be supported using a support member so as to be positioned on the rear surface 22a of the heat dissipation block 22.

[0024] More specifically, the blower 24 is an axial-flow type blower and has two vents (first vent 24a and second vent 24b) on both sides of the axial direction (front-to-back direction) of the blower 24. In this embodiment, the first vent 24a on the front side of the blower 24 (the side facing the heat dissipation block 22) is an intake port, and the second vent 24b on the rear side of the blower 24 (the side opposite to the heat dissipation block 22) is an exhaust port. In other words, in this embodiment, the blower 24 exhausts the hot air from the heat dissipation block 22 by drawing in the hot air from the heat dissipation block 22 through the first vent 24a and exhausting it through the second vent 24b.

[0025] Alternatively, the first vent 24a at the front of the blower 24 may be an exhaust port, and the second vent 24b at the rear of the blower 24 may be an intake port. In this case, the blower 24 exhausts the hot air from the heat dissipation block 22 by blowing the air drawn in from the second vent 24b of the blower 24 onto the heat dissipation block 22.

[0026] In this embodiment, the blower 24 is of the axial flow type, but it may be of a different type (for example, centrifugal flow type).

[0027] In this embodiment, the LED module 20, mounting plate 21, heat dissipation block 22, and blower 24 are arranged in a line in the front-to-back direction (first direction). The LED module 20, mounting plate 21, heat dissipation block 22, and blower 24 are integrally connected (fixed) to each other. The LED module 20, mounting plate 21, heat dissipation block 22, and blower 24 are movable as a single unit in the front-to-back direction.

[0028] The partition member 25 is a member for dividing the internal space of the housing 1 into a first space S1 and a second space S2 (see Figure 3). The first space S1 is the space in the internal space of the housing 1 that is on the LED module 20 side (i.e., the front side) of the mounting plate 21. The second space S2 is the space in the internal space of the housing 1 that is on the heat dissipation block 22 side (i.e., the rear side) of the mounting plate 21. The partition member 25 is formed in a flat plate shape from a material that has light-shielding and heat-conducting properties (for example, a metal such as aluminum). The partition member 25 protrudes from the mounting plate 21 to the outer circumference of the mounting plate 21. The partition member 25 is fixed to the front surface of the mounting plate 21, for example, by screws.

[0029] The partition member 25 reduces the amount of light emitted from the LED module 20 that leaks out of the housing 1 instead of reaching the lens 3. The partition member 25 also prevents foreign matter (dust and debris) and hot air generated by the heat dissipation block 22 from entering the first space S1 from the second space S2 of the housing 1. Furthermore, the partition member 25 prevents external light that enters the second space S2 through the ventilation holes 102 of the housing 1 (described later) from entering the first space S1.

[0030] (2-2) Lens Lens 3 is configured to focus the light emitted from the LED module 20. Lens 3 is, for example, a thin lens (e.g., a Fresnel lens). Lens 3 is fixed to the housing 1 so that its optical axis aligns with the optical axis of the LED module 20. However, lens 3 is not limited to a thin lens and may be, for example, a plano-convex lens, a biconvex lens, a plano-concave lens, or a biconcave lens. Furthermore, the lighting device A1 may have multiple lenses of the same or different types.

[0031] (2-3) Adjustment Unit As shown in Figures 4 and 5, the adjustment unit 4 is a unit for moving the light source unit 2 in the front-rear direction relative to the housing 1. The adjustment unit 4 includes a mounting base 40, a screw shaft 41, a nut member 42, a guide shaft 43, a guide member 44, a handle 45, a base portion 46, and the like.

[0032] The mounting base 40 is a component to which the light source unit 2 is attached. The mounting base 40 has, for example, a flat portion 400 formed in the shape of a rectangular plate, and a rectangular front plate 401 that protrudes upward from the front end of the flat portion 400. The light source unit 2 is positioned on the upper surface of the flat portion 400. The flat portion 400 is provided with, for example, a rectangular opening 400a for ventilation so as to overlap with the heat dissipation block 22 (see Figure 3). The front plate 401 is positioned on the front side of the lower part of the heat dissipation block 22. The center of the front plate 401 is provided with, for example, a rectangular opening 401a for ventilation. The upper edge of the front plate 401 is fixed to the lower edge of the mounting plate 21 of the light source unit 2, for example, by screws.

[0033] A nut member 42 and a guide member 44 are attached to the lower surface of the flat portion 400. More specifically, of the left and right edges of the lower surface of the flat portion 400, the nut member 42 is attached to one edge (for example, the left edge), and the guide member 44 is attached to the other edge (for example, the right edge).

[0034] The nut member 42 is columnar (for example, prismatic) and fixed to the lower surface of the flat portion 400. The nut member 42 has an axial hole 42a that penetrates in the axial direction (front-to-back direction). A screw shaft 41 is inserted into this axial hole 42a. As the screw shaft 41 rotates forward or backward, the nut member 42 moves forward or backward along the screw shaft 41.

[0035] The guide member 44 is a member that guides the guide shaft 43 so that it can move in its axial direction. The guide member 44 has, for example, a trough-shaped guide portion 441 that guides the guide shaft 43, and, for example, a plate-shaped fixing portion 442 that protrudes upward from the upper part of the guide portion 441 and fixes the guide portion 441 to the lower surface of the flat portion 400.

[0036] The base portion 46 is a member that rotatably supports the screw shaft 41 and also supports the guide shaft 43. The base portion 46 has a first support portion 461, a second support portion 462, a connecting portion 463, and so on.

[0037] The first support portion 461 and the second support portion 462 are each long members in the left-right direction (for example, plate-shaped members), and are formed, for example, by bending metal. The first support portion 461 rotatably supports the front end of the screw shaft 41 at one end in its longitudinal direction (left-right direction) (for example, the left end), and supports the front end of the guide shaft 43 at the other end in its longitudinal direction (for example, the right end). Similarly, the second support portion 462 rotatably supports the rear end of the screw shaft 41 at one end in its longitudinal direction (left-right direction) (for example, the left end), and supports the rear end of the guide shaft 43 at the other end in its longitudinal direction (left-right direction) (for example, the right end). The rear end of the screw shaft 41 passes through the second support portion 462 and protrudes to the rear of the second support portion 462 (see Figure 5). A handle 45 is fixed to the rear end of the screw shaft 41. The screw shaft 41 can be rotated by manually rotating the handle 45.

[0038] The connecting portion 463 is a member that connects the first support portion 461 and the second support portion 462. The connecting portion 463 has a pair of left and right first connecting portions 464 and a second connecting portion 465. The pair of left and right first connecting portions 464 are each members that are long in the front-to-back direction and are formed, for example, by bending metal. The left first connecting portion 464 is connected to the left ends of the first support portion 461 and the second support portion 462 at both ends in its longitudinal direction (front-to-back direction). The right first connecting portion 464 is connected to the right ends of the first support portion 461 and the second support portion 462 at both ends in its longitudinal direction (front-to-back direction).

[0039] The second connecting portion 465 is a member that connects the left and right pair of first connecting portions 464. The second connecting portion 465 is a member that is long in the front-to-back direction (for example, a plate-shaped member), and is formed, for example, by bending metal. The left and right edges of the second connecting portion 465 form stepped portions that are stepped downward relative to the central portion of the second connecting portion 465. A screw shaft 41 and a guide shaft 43 are arranged on these left and right stepped portions, respectively. The second connecting portion 465 is positioned between the left and right pair of first connecting portions 464. Both ends of the second connecting portion 465 in the short direction (left-to-right direction) are connected to the inner sides of each of the left and right pair of first connecting portions 464. The second connecting portion 465 is positioned between, for example, the front half of the left and right pair of first connecting portions 464.

[0040] In this adjustment unit 4, the mounting base 40 to which the light source unit 2 is attached can be moved in the forward and backward directions along the screw shaft 41 and the guide shaft 43 by rotating the handle 45 (forward or reverse). In other words, the light source unit 2 can be moved in the forward and backward directions by rotating the handle 45.

[0041] (2-4) Circuit Blocks As shown in Figure 3, the circuit block 7 includes a power supply circuit, a lighting circuit, a control circuit, and one or more printed circuit boards on which these circuits are mounted. The circuit block 7 is located below the base portion 46 of the adjustment unit 4. The power supply circuit is configured to convert AC power supplied from the AC power system via the power supply block 6 into DC power. The lighting circuit is configured to step down the DC voltage output from the power supply circuit and supply a DC current (load current) to the LED module 20 to light up the LED module 20. The control circuit controls the lighting circuit so that the load current output from the lighting circuit to the LED module 20 matches a target value.

[0042] (2-5) Enclosure As shown in Figures 1 to 3, the housing 1 houses the light source unit 2, lens 3, adjustment unit 4, and circuit block 7. The housing 1 is formed in the shape of a box (for example, a rectangular box) with the front-to-back direction as its longitudinal direction. It is desirable that the inside of the housing 1 be colored with a color that has low reflectivity (black or gray) (i.e., has light-shielding properties) so that unwanted reflected light reflected inside the housing 1 is less likely to be emitted outside the housing 1. The housing 1 has a cover 10, a first housing section 11, a second housing section 12, a third housing section 13, a filter holder 14, and the like.

[0043] The first housing section 11 is the part that houses the light source unit 2 and the lens 3. The first housing section 11 is box-shaped (for example, a rectangular box shape) with open top and bottom surfaces, and is located at the top of the housing 1. The lower end of the first housing section 11 is fixed to the upper end of the second housing section 12 or to the base section 46 of the adjustment unit 4. The lens 3 is fixed to the front inside the first housing section 11. The light source unit 2 is positioned behind the lens 3 inside the first housing section 11 so that the LED module 20 faces the lens 3 directly.

[0044] The front of the first housing section 11 (the front surface 1d of the housing 1) is provided with, for example, a circular outlet 110 for emitting illumination light (light source) emitted from the LED module 20 to the outside of the housing 1. Therefore, the illumination light (light source) emitted from the LED module 20 passes through the optical components 23 and the lens 3, and then exits the housing 1 through the outlet 110. The rear surface of the first housing section 11 (i.e., the rear surface 1c of the housing 1) is provided with a plurality of ventilation holes 101. The rear surface 1c of the housing 1 is composed of the entirety of the rear surfaces of the first to third housing sections 11 to 13.

[0045] The cover 10 is a member that closes the upper opening of the first housing section 11. The cover 10 is plate-shaped and conforms to the opening on the upper surface of the first housing section 11. The cover 10 (i.e., the upper surface 1a of the housing 1) is provided with a plurality of ventilation holes 102.

[0046] The second housing section 12 is the part that houses the adjustment unit 4. The second housing section 12 is box-shaped (for example, a rectangular box shape) with open top and bottom surfaces, and is located in the middle section of the housing 1 (i.e., below the first housing section 11). The second housing section 12 is fixed to the outer circumference of the base section 46 of the adjustment unit 4. The handle 45 of the adjustment unit 4 is positioned on the rear surface of the second housing section 12 (i.e., the rear surface 1c of the housing 1).

[0047] The third housing section 13 is the part that houses the circuit block 7. The third housing section 13 is, for example, a rectangular box shape and is located at the bottom of the housing 1 (i.e., below the second housing section 12). The third housing section 13 is fixed to the lower end of the base section 46 of the adjustment unit 4. A power supply block 6 is provided on the rear surface of the third housing section 13. The power supply block 6 has a terminal box 60 fixed to the housing 1, a power cable 61 drawn out from the terminal box 60, and a power plug 62 provided at the end of the power cable 61. Inside the terminal box 60, the power cable 61 is electrically connected to the power circuit of the circuit block 7.

[0048] The filter holder 14 is detachably attached to the front of the first housing section 11. The filter holder 14 is a component for holding color filters. In stage lighting, color filters are used to adjust or change the color of white lighting. The color filter is held in the filter holder 14 and positioned in front of the output port 110.

[0049] The housing 1 is provided with an arm block 5. The arm block 5 is a component that supports the housing 1 so that it can rotate around a horizontal axis and a vertical axis while being supported by a support device (e.g., tripod stands and suspension devices). The arm block 5 includes an arm 50, an arm knob 51, a mounting bracket 52, and the like.

[0050] The arm 50 is formed in an inverted U-shape from a metal rod. Both ends of the arm 50 are rotatably attached, one at the center of the left side and one at the center of the right side of the first housing section 11 of the housing 1. The arm knob 51 is rotatably attached, for example, to the right side of the first housing section 11 of the housing 1. When the arm knob 51 is tightened, the right end of the arm 50 is fixed to the housing 1. On the other hand, when the arm knob 51 is loosened, the housing 1 becomes rotatable around a horizontal axis relative to the arm 50. The horizontal axis is the axis that passes through the aforementioned center positions on the left side and the right side of the first housing section 11.

[0051] The mounting bracket 52 is a component for attaching the arm 50 to the support so that it can rotate around a vertical axis. The mounting bracket 52 is located in the center of the arm 50. The mounting bracket 52 has a mounting member (dowel 520) for attaching to the support. The support (e.g., suspension device) includes a hanger. A hanger is a mounting device used when suspending a lighting fixture from a fixedly attached pipe for suspending lighting fixtures, such as a building structural material or fly duct. A hanger generally consists of a pipe clamp section that can be freely attached to and detached from a pipe for suspending lighting fixtures (also called a baton) and a section (dowel receiver) into which the dowel 520 is inserted and held.

[0052] (3) Details of the arrangement and shape of the ventilation holes in the enclosure As shown in Figure 1, the housing 1 has a plurality of ventilation holes 102 as described above. The plurality of ventilation holes 102 are arranged vertically and horizontally in a predetermined area (for example, the rear half area) of the upper surface 1a of the housing 1. The plurality of ventilation holes 102 include elongated holes that are long in the front-to-back direction of the housing 1 (i.e., in the direction in which the heat sink 211 protrudes). In this embodiment, all of the plurality of ventilation holes 102 are elongated holes that are long in the front-to-back direction of the housing 1.

[0053] In this embodiment, the housing 1 has an upper surface 1a (first wall surface) and a lower surface 1b (second wall surface) that face each other in the vertical direction (a direction perpendicular to both the front-to-back direction and the lateral direction of the housing 1). The multiple ventilation holes 102 are arranged only on the upper surface 1a of the upper surface 1a and lower surface 1b of the housing 1, but they may be arranged on both the upper surface 1a and lower surface 1b, or on the left and right surfaces of the housing 1. The number of ventilation holes 102 on the upper surface 1a (first wall surface) of the housing 1 is assumed to be greater than the number of ventilation holes 102 on the lower surface 1b (second wall surface) of the housing 1. In this case, the ventilation holes 102 are provided only on the upper surface 1a of the upper surface 1a and lower surface 1b of the housing 1. Since the hot air generated in the heat dissipation block 22 flows upward (towards the ceiling), the number of ventilation holes 102 on the upper surface 1a is greater than the number of ventilation holes 102 on the lower surface 1b.

[0054] In this embodiment, the upper surface 1a (first wall surface) of the housing 1 (i.e., the side with the larger number of ventilation holes 102 among the two opposing surfaces of the housing 1 in the vertical direction) is assumed to be the ceiling side (or upper side). The lower surface 1b (second wall surface) of the housing 1 (i.e., the side with the smaller number of ventilation holes 102 among the two opposing surfaces of the housing 1 in the vertical direction) is assumed to be the ground side (lower side).

[0055] More specifically, as shown in Figure 6A, the plurality of ventilation holes 102 include ventilation holes 102 located in the movable region W10 of the upper surface 1a of the housing 1. In this embodiment, most of the plurality of ventilation holes 102 (ventilation holes 102 other than the last row of ventilation holes 102) are located in the movable region W10 of the upper surface 1a of the housing 1. The movable region W10 is the area in which the contour of the light source unit 2 scans the upper surface 1a of the housing 1 when the light source unit 2 moves between a first position and a second position, as viewed from the vertical direction (a direction perpendicular to the first direction). In this embodiment, the light source unit 2 is movable along the front-back direction (first direction) between a first position (position of the light source unit 2 shown in Figure 9) and a second position (position of the light source unit 2 shown in Figure 10) within the housing 1. The first position is the position furthest from the output port 110 of the housing 1. The second position is the position closest to the output port 110 of the housing 1.

[0056] More specifically, the movable region W10 on the upper surface 1a of the housing 1 includes a first region W1 and a second region W2 (see Figure 6A). The first region W1 is the region in the housing 1 that overlaps with the heat dissipation block 22 when the light source unit 2 is in a first position, as viewed from the vertical direction (see Figure 6B). The second region W2 is the region in the housing 1 that overlaps with the heat dissipation block 22 when the light source unit 2 is in a second position, as viewed from the vertical direction (see Figure 6C).

[0057] The multiple ventilation holes 102 include ventilation holes 102 located in the first region W1 and ventilation holes 102 located in the second region W2. In the example shown in Figure 6A, the ventilation holes 102 are located throughout the entire first region W1. In the second region W2, the ventilation holes 102 are located only at the rear end (i.e., the edge on the blower 24 side). The entire set of multiple ventilation holes 102 is located behind the partition member 25 (front end) (towards the heat dissipation block 22) when the light source unit 2 is in the first position (see Figure 6B).

[0058] As shown in Figure 6B, the arrangement of multiple ventilation holes 102 in the housing 1 allows the ventilation holes 102 located in the first region W1 of the housing 1 to overlap with the heat dissipation block 22 of the light source unit 2 when the light source unit 2 is in the first position. This allows for efficient exhaust of hot air from the heat dissipation block 22 to the outside of the housing 1 and efficient intake of outside air into the heat dissipation block 22 when the heat dissipation block 22 is in the first position. As a result, the heat dissipation performance of the heat dissipation block 22 can be ensured. Furthermore, when the light source unit 2 is in the first position, all of the multiple ventilation holes 102 are located behind the partition member 25 (front end). Therefore, the partition member 25 can prevent light from the LED module 20 from leaking out of the housing 1 through the ventilation holes 102.

[0059] Furthermore, when the light source unit 2 is in the second position, as shown in Figure 6C, the ventilation holes 102 located in the second region W2 of the housing 1 overlap with the heat dissipation block 22 of the light source unit 2. This allows for efficient exhaust of hot air from the heat dissipation block 22 to the outside of the housing 1 and efficient intake of outside air into the heat dissipation block 22, even when the heat dissipation block 22 is in the second position. As a result, the heat dissipation performance of the heat dissipation block 22 can be ensured regardless of the position of the light source unit 2.

[0060] (4) Details of partition members As shown in Figures 4 and 5, the partition member 25 is fixed to the peripheral edge of the front surface of the mounting plate 21 and protrudes from the peripheral edge of the mounting plate 21 toward the outer circumference of the mounting plate 21. The partition member 25 comprises a first partition plate 30 and a second partition plate 34 (fourth plate portion).

[0061] The first partition plate 30 is formed in the shape of an inverted, roughly U-shaped plate that surrounds the upper side and both sides of the mounting plate 21. The first partition plate 30 has an upper plate portion 31 (first plate portion), a left plate portion 32 (second plate portion), and a right plate portion 33 (third plate portion). The upper plate portion 31, the left plate portion 32, and the right plate portion 33 are formed integrally.

[0062] The upper plate portion 31 is, for example, a plate whose width in the left-right direction is longer than the width of the mounting plate 21 in the left-right direction. The upper plate portion 31 protrudes upward (towards the first wall surface) from the upper end of the mounting plate 21. The upper plate portion 31 has a lower half portion 31a, an upper half portion 31b, and a tip portion 31c. The lower half portion 31a is, for example, a roughly rectangular flat plate. The lower half portion 31a is parallel to the mounting plate 21 and protrudes upward from the upper end of the mounting plate 21. The upper half portion 31b is, for example, a roughly trapezoidal shape with both the left and right sides curved in an arc shape and protrudes diagonally upward and forward from the upper end of the lower half portion 31a. The tip portion 31c is, for example, a rectangular flat plate and protrudes parallel to the front from the front end of the upper plate portion 31.

[0063] The left side plate portion 32 is, for example, a roughly rectangular flat plate. The left side plate portion 32 protrudes from the left side of the mounting plate 21 (one side in the lateral direction of the housing 1) and is arranged parallel to the mounting plate 21. The upper end of the left side plate portion 32 is connected to the lower left end of the upper side plate portion 31. The left edge of the left side plate portion 32 is bent to the rear and protrudes to the rear. The right edge of the left side plate portion 32 is fixed with screws to the left edge of the front surface of the mounting plate 21.

[0064] The right-side plate portion 33 is, for example, a roughly rectangular flat plate. The right-side plate portion 33 protrudes to the right of the mounting plate 21 (the other side of the housing 1 in the lateral direction) and is arranged parallel to the mounting plate 21. The upper end of the right-side plate portion 33 is connected to the lower right end of the upper plate portion 31. The right edge of the right-side plate portion 33 is bent to the rear and protrudes to the rear. The left edge of the right-side plate portion 33 is fixed with screws to the right edge of the front surface of the mounting plate 21.

[0065] The second partition plate 34 protrudes from the lower side (second wall side) of the mounting plate 21. The second partition plate 34 is a roughly rectangular plate whose width in the left-right direction is longer than the width of the mounting plate 21 in the left-right direction. The second partition plate 34 protrudes downward from the lower edge of the mounting plate 21 and is positioned parallel to the mounting plate 21 on the lower side of the mounting plate 21. The upper edge of the second partition plate 34 is fixed to the lower edge of the mounting plate 21 with screws. The upper left part of the second partition plate 34 is in contact with the lower part of the left side plate portion 32 of the first partition plate 30. The upper right part of the second partition plate 34 is in contact with the lower part of the right side plate portion 33 of the first partition plate 30.

[0066] The LED module 20 is surrounded by the first partition plate 30 and the second partition plate 34.

[0067] The partition members 25 (i.e., the first partition plate 30 and the second partition plate 34) and the mounting plate 21 each have thermal conductivity. The partition members 25 and the mounting plate 21 are in contact with each other. This allows the heat capacity of the mounting plate 21 to be increased by the amount of the heat capacity of the partition members 25. As a result, the heat generated by the LED module 20 can be quickly dissipated from the LED module 20 to the mounting plate 21.

[0068] Furthermore, the housing 1 has thermal conductivity. It is desirable that the partition member 25 and the housing 1 are in contact with each other. In this case, for example, the outer edge of the partition member 25 and the inner surface of the housing 1 may be in contact with each other. By the partition member 25 and the housing 1 being in contact with each other, the heat capacity of the mounting plate 21 can be further increased by the amount of the heat capacity of the housing 1. As a result, the heat generated by the LED module 20 can be dissipated from the LED module 20 to the mounting plate 21 more quickly.

[0069] Furthermore, because the partition member 25 and the housing 1 are in contact with each other, the gap between the partition member 25 and the housing 1 can be reduced. As a result, it is possible to suppress the entry of foreign matter from the second space S2 inside the housing 1 into the first space S1.

[0070] Furthermore, the partition member 25 has light-shielding properties. This prevents the light emitted from the LED module 20 from leaking from the first space S1 inside the housing 1 to the second space S2. As a result, it is possible to prevent the light emitted from the LED module 20 from leaking outside the housing 1 through the ventilation holes 101 and 102 of the housing 1. Moreover, it is possible to prevent external light that enters the second space S2 inside the housing 1 through the ventilation holes 101 and 102 of the housing 1 from entering the first space S1 inside the housing 1.

[0071] In this embodiment, the first partition plate 30 and the second partition plate 34 are separate components, but they may be formed integrally.

[0072] (5) Details of the heat sink shape As shown in Figure 7, the heat sink 221 is, for example, trapezoidal when viewed from the left-right direction. The heat sink 221 has a front side 221a (second side), a rear side 221b (first side), an upper side 221c, and a lower side 221d. The upper side 221c and the lower side 221d extend in the front-rear direction and are parallel to each other. The front side 221a is the side corresponding to the mounting plate 21. The rear side 221b is the side corresponding to the blower 24.

[0073] The front edge 221a is perpendicular to the front-to-back direction. The rear edge 221b is inclined with respect to the front-to-back direction. That is, the rear edge 211d is inclined with respect to the front edge 221a. More specifically, the rear edge 221b is inclined with respect to the front edge 221a such that the width D1 of the heat sink 221 in the front-to-back direction (first direction) increases from the bottom edge 221d side (second wall side of the housing 1) to the top edge 221c side (first wall side of the housing 1).

[0074] As described above, the width D1 of the heat sink 221 in the front-to-back direction increases from the bottom edge 221d to the top edge 221c, so hot air inside the heat sink block 22 tends to accumulate on the top edge 221c side (the side with the wider width D1). As a result, the hot air accumulated on the top edge 221c side of the heat sink block 22 can be efficiently exhausted by the blower 24. This improves the heat dissipation performance of the heat sink block 22. In addition, because the rear edge 221b of the heat sink 221 is inclined with respect to the front-to-back direction, the blower 24 can be positioned in the dead space created at the rear of the heat sink block 22.

[0075] Of the multiple heat sinks 221, at least one of the two heat sinks 221 located at both the left and right ends has an opening 221e. In this embodiment, all of the multiple heat sinks 221 have openings 221e. Multiple openings 221e (three in the illustrated example) are provided on each heat sink 211, spaced apart from each other in the vertical direction of the heat sink 211. The openings 221e allow outside air (relatively cool air) to circulate between the heat sinks 221, improving the heat dissipation performance of the heat sink block 22.

[0076] (6) Arrangement relationship between the blower and the heat dissipation block As shown in Figures 7 and 8, the blower 24 is positioned on the rear surface 22a of the heat dissipation block 22.

[0077] The rear surface 22a of the heat dissipation block 22 is a rectangular region defined by the set of rear ends of each of the multiple heat sinks 221. In other words, the rear surface 22a of the heat dissipation block 22 is a rectangular region enclosed by the rear edge L1 of the left main surface of the leftmost heat sink 221L, the rear edge R1 of the right main surface of the rightmost heat sink 221R, the line segment M1 connecting the upper ends of the two sides R1 and L1, and the line segment N1 connecting the lower ends of the two sides L1 and R1 (see Figure 8).

[0078] The first vent 24a of the blower 24 (the vent on the heat dissipation block 22 side) faces the rear surface 22a of the heat dissipation block 22. That is, the first vent 24a of the blower 24 faces the gap Q1 between the multiple heat dissipation plates 221 (see Figure 8). The second vent 24b of the blower 24 (the vent on the opposite side from the heat dissipation block 22) faces the multiple ventilation holes 101 on the rear surface 1c of the housing 1 via the space behind the heat dissipation block 22 (see Figure 3).

[0079] As described above, since the first vent 24a of the blower 24 faces the gap Q1 between the multiple heat sinks 221, the blower 24 can efficiently exhaust the hot air that accumulates in the gap Q1 between the multiple heat sinks 221.

[0080] As shown in Figure 8, the first vent 24a of the blower 24 is located within the range of the rear surface 22a of the heat dissipation block 22 when viewed from the front-to-back direction. More specifically, in this embodiment, the rear surface 22a of the heat dissipation block 22 is a vertically elongated rectangle when viewed from the front-to-back direction. That is, the vertical length of the rear surface 22a of the heat dissipation block 22 is longer than the horizontal length of the rear surface 22a of the heat dissipation block 22. The first vent 24a of the blower 24 is located inside both ends L1, R1 in the horizontal direction of the rear surface 22a of the heat dissipation block 22. In other words, the first vent 24a of the blower 24 does not protrude beyond the outer circumference of the rear surface 22a of the heat dissipation block 22.

[0081] As described above, the first vent 24a of the blower 24 is located within the range of the rear surface 22a of the heat dissipation block 22 when viewed from the front and rear directions. Therefore, when drawing in hot air from inside the heat dissipation block 22 through the first vent 24a of the blower 24, it is possible to suppress the inflow of air from outside the heat dissipation block 22 into the first vent 24a of the blower 24. Also, when blowing away the hot air inside the heat dissipation block 22 with exhaust from the first vent 24a of the blower 24, it is possible to suppress the outflow of exhaust from the first vent 24a of the blower 24 to the outside of the heat dissipation block 22. As a result, the hot air inside the heat dissipation block 22 can be efficiently exhausted.

[0082] As shown in Figure 8, when viewed from the front and rear, the number of heat sinks 221 that overlap the first vent 24a of the blower 24 is greater than the number of heat sinks 221 that do not overlap the first vent 24a. In the example in Figure 8, the first vent 24a does not overlap with the two heat sinks 221L and 221R at the left and right ends of the multiple (16) heat sinks 221, but overlaps with the other 14 heat sinks 221. This prevents the first vent 24a of the blower 24 from becoming too small compared to the rear surface 22a of the heat dissipation block 22. As a result, the blower 24 can effectively improve the heat dissipation performance of the heat dissipation block 22.

[0083] As shown in Figure 7, the blower 24 is positioned on the rear surface 22a of the heat dissipation block 22 at a position between the upper limit position and the lower limit position. The upper limit position is the position of the blower 24 when, viewed from the front-to-back direction, the upper end T1 of the first vent 24a of the blower 24 is in contact with the upper edge U1 of the rear surface 22a of the heat dissipation block 22. The lower limit position is the position of the blower 24 when, viewed from the front-to-back direction, the lower end T2 of the first vent 24a of the blower 24 is in contact with the lower edge U2 of the rear surface 22a of the heat dissipation block 22.

[0084] More specifically, it is desirable that the blower 24 be positioned on the rear surface 22a of the heat dissipation block 22, when viewed from the front-to-back direction, at an overlapping position where the center Y1 of the first vent 24a of the blower 24 coincides with the center Y2 of the LED module 20, or at an upper limit position above this overlapping position. More preferably, the blower 24 is positioned at the aforementioned upper limit position on the rear surface 22a of the heat dissipation block 22 when viewed from the front-to-back direction. In the example of Figure 7, the blower 24 is positioned at (or near) the aforementioned overlapping position on the rear surface 22a of the heat dissipation block 22 when viewed from the front-to-back direction. The hot air generated by the LED module 20 tends to accumulate above the LED module 20 on the heat dissipation block 22. For this reason, by positioning the blower 24 at the overlapping position on the rear surface 22a of the heat dissipation block 22, or at an upper limit position above this overlapping position, when viewed from the front-to-back direction, the blower 24 can efficiently exhaust the hot air generated by the LED module 20.

[0085] (7) Operation Description As shown in Figure 10, when the light source unit 2 is moved to the second position inside the housing 1, a space Q3 is secured behind the blower 24 inside the housing 1. In this space Q3, the ventilation holes 102 on the top surface 1a and the ventilation holes 101 on the rear surface 1c of the housing 1 face each other. Therefore, when the blower 24 exhausts air from the second ventilation port 24b, the exhaust air from the second ventilation port 24b can be efficiently discharged to the outside of the housing 1 through the ventilation holes 101 and 102 on the top surface 1a and rear surface 1c of the housing 1. Also, when the blower 24 draws in air from the second ventilation port 24b, the air drawn in from the second ventilation port 24b can be efficiently taken into the housing 1 through the ventilation holes 102 on the top surface 1a and the ventilation holes 101 on the rear surface 1c of the housing 1. Therefore, regardless of the orientation of the lighting device A1 (horizontal orientation and vertically downward orientation), the blower 24 can improve the heat dissipation performance of the heat dissipation block 22.

[0086] Furthermore, when the light source unit 2 is moved to the second position within the housing 1, as shown in Figure 6C, the ventilation holes 102 in the second region W2 on the upper surface 1a of the housing 1 overlap with the rear of the heat dissipation block 22. As a result, the ventilation holes 102 in the second region W2 can efficiently exhaust the hot air from the heat dissipation block 22 to the outside of the housing 1, and efficiently draw in outside air into the heat dissipation block 22. This further improves the heat dissipation performance of the heat dissipation block 22.

[0087] Furthermore, when the light source unit 2 is moved to the second position inside the housing 1, all of the ventilation holes 102 on the upper surface 1a of the housing 1 are positioned behind the partition member 25 (front end) (Figure 6C). As a result, the partition member 25 prevents light from the LED module 20 from leaking out of the housing 1 through the ventilation holes 102.

[0088] On the other hand, as shown in Figure 9, when the light source unit 2 is moved to the first position inside the housing 1, the blower 24 approaches the rear surface 1c of the housing 1, so it is not possible to secure space Q3 behind the blower 24, but it approaches the ventilation holes 101 on the rear surface 1c of the housing 1. Therefore, the blower 24 can efficiently exhaust air from the second ventilation port 14b through the ventilation holes 101 on the rear surface 1c, or efficiently draw air from the second ventilation port 24b through the ventilation holes 101 on the rear surface 1c. As a result, the heat dissipation performance of the heat dissipation block 22 can be improved by the blower 24.

[0089] Furthermore, when the light source unit 2 is moved to the first position within the housing 1, as shown in Figure 6B, the ventilation holes 102 in the first region W1 on the upper surface 1a of the housing 1 overlap with the heat dissipation block 22. As a result, the ventilation holes 102 in the first region W1 can efficiently exhaust the hot air from the heat dissipation block 22 to the outside of the housing 1, or efficiently draw in outside air into the heat dissipation block 22. This further improves the heat dissipation performance of the heat dissipation block 22.

[0090] Furthermore, when the light source unit 2 is moved to the first position inside the housing 1, all of the multiple ventilation holes 102 on the upper surface 1a of the housing 1 are positioned behind the partition member 25 (front end) (Figure 6B). As a result, the partition member 25 prevents light from the LED module 20 from leaking out of the housing 1 through the ventilation holes 102.

[0091] In this embodiment, the blower 24 is fixed to the rear surface 22a of the heat dissipation block 22. Therefore, whether the light source unit 2 is moved to a first position within the housing 1 or to a second position within the housing 1, the blower 24 is always positioned on the rear surface 22a of the heat dissipation block 22. As a result, the blower 24 can stably exhaust the hot air from the heat dissipation block 22 regardless of the position of the light source unit 2. Consequently, the blower 24 can stably improve the heat dissipation performance of the heat dissipation block 22.

[0092] (8) Main effects The lighting device A1 according to this embodiment comprises a light source unit 2 and a housing 1. The housing 1 houses the light source unit 2. The light source unit 2 comprises a mounting plate 21, an LED module 20 (light source), a heat dissipation block 22, and a blower 24. The mounting plate 21 has a front surface (first main surface) and a rear surface (second main surface) that face each other. The LED module 20 is positioned on the front surface of the mounting plate 21. The heat dissipation block 22 is positioned on the rear surface of the mounting plate 21. The blower 24 is positioned on the rear surface 22a of the heat dissipation block 22 (the surface opposite to the mounting plate 21). The light source unit 2 is movable relative to the housing 1 in the front-to-back direction (first direction), which is the direction in which the mounting plate 21, LED module 20, heat dissipation block 22, and blower 24 are aligned.

[0093] With this configuration, the blower 24 and the heat dissipation block 22 move together, so the distance between the heat dissipation block 22 and the blower 24 can be kept constant regardless of the movement of the light source unit 2. As a result, the blower 24 can stably improve the heat dissipation performance of the heat dissipation block 22 regardless of the position of the light source unit 2.

[0094] (9) Variant Next, a modified example of the lighting device A1 according to this embodiment will be described.

[0095] (9-1) Variation 1 In the above embodiment, the blower 24 is positioned (fixed) on the rear surface 22a of the heat dissipation block 22 (see Figure 7). In contrast, in Modification 1, as shown in Figure 11, the blower 24 is positioned at a distance from the heat dissipation block 22 on the rear side of the heat dissipation block 22 (opposite side from the mounting plate 21). More specifically, in Modification 1, the blower 24 is positioned at a distance from the heat dissipation block 22 and fixed relative to the heat dissipation block 22. That is, the blower 24 is positioned at a distance from the heat dissipation block 22, but is fixed relative to the heat dissipation block 22. Therefore, the blower 24 can move integrally in the front-rear direction with the LED module 20, the mounting plate 21, and the heat dissipation block 22.

[0096] The lighting device A1 of the modified example 1 is configured in the same way as the embodiment described above, except that the blower 24 is fixed relative to the heat dissipation block 22 at a distance from the heat dissipation block 22 on the rear side of the heat dissipation block 22.

[0097] More specifically, the light source unit 2 of Modification 1 further includes a support member 26 for supporting the blower 24 in the light source unit 2 of the above embodiment. The support member 26 is fixed to the mounting plate 21 of the light source unit 2 and supports the blower 24 so that it is positioned behind the heat dissipation block 22 with a gap between it and the heat dissipation block 22. In this supported state, the first vent (vent on the heat dissipation block side) 24a of the blower 24 faces the gap between the multiple heat dissipation plates 221.

[0098] More specifically, the support member 26 has a flat portion 261, a front plate 262, and a rear plate 263. The flat portion 261 is the part that is placed on the lower surface of the heat dissipation block 22. The flat portion 261 is, for example, a rectangular plate, and a ventilation opening 261a is provided in the part that overlaps with the heat dissipation block 22. The front plate 262 is a rectangular plate that protrudes upward from the front end of the flat portion 261, and its upper edge is fixed to the lower edge of the mounting plate 21 of the light source unit 2 with screws. A ventilation opening 262a, for example, a rectangular opening is provided in the center of the front plate 262. The rear plate 263 is a rectangular plate that protrudes upward from the rear end of the flat portion 261. The rear plate 263 is placed at a distance from the rear side of the heat dissipation block 22. A blower 24 is fixed to the rear surface of the rear plate 263 with screws. The rear plate 263 is provided with an opening 263a in the portion facing the first vent 24a of the blower 24 (vent on the heat dissipation block side) 24a, in order to expose the first vent 24a to the heat dissipation block 22 side.

[0099] The flat portion 261 and front plate 262 of the support member 26 are also used as the mounting base 40 (flat portion 400 and front plate 401) of the adjustment unit 4 in the above embodiment. That is, the support member 26 is constructed by adding a rear plate 263 to the mounting base 40. In this embodiment, the support member 26 is used as the mounting base 40, but it may also be constructed with a different configuration from the mounting base 40.

[0100] In Modification 1, similar to the above embodiment, the LED module 20 (light source), mounting plate 21, heat dissipation block 22, and blower 24 are integrally movable in the front-rear direction. This allows the distance between the blower 24 and the heat dissipation block 22 to be kept constant regardless of the movement position of the heat dissipation block 22. As a result, the heat dissipation performance of the heat dissipation block 22 can be stably improved by the blower 24 regardless of the movement position of the heat dissipation block 22.

[0101] This modified example provides the same effects as the above embodiment, but also improves the degree of freedom in arranging the blower 24.

[0102] (10) aspects Based on the embodiments and modifications described above, the following embodiments are disclosed.

[0103] The first embodiment of the lighting device (A1) comprises a light source unit (2) and a housing (1). The housing (1) houses the light source unit (2). The light source unit (2) comprises a mounting plate (21), a light source (20), a heat dissipation block (22), and a blower (24). The mounting plate (21) has a first main surface (front) and a second main surface (rear) that face each other. The light source (20) is positioned on the first main surface of the mounting plate (21). The heat dissipation block (22) is positioned on the second main surface of the mounting plate (21). The blower (24) is positioned on the heat dissipation block (22) opposite to the mounting plate (21). The light source unit (2) is movable relative to the housing (1) in a first direction (front-to-back direction) in which the mounting plate (21), light source (20), heat dissipation block (22), and blower (24) are aligned.

[0104] With this configuration, the blower (24) is positioned (fixed) on the opposite side of the mounting plate (21) on the heat dissipation block (22), so that the distance between the heat dissipation block (22) and the blower (24) can be kept constant regardless of the movement of the light source unit (2). As a result, the blower (24) can stably improve the heat dissipation performance of the heat dissipation block (22) regardless of the position of the light source unit (2).

[0105] In the lighting device (A1) of the second embodiment, the heat dissipation block (22) has a plurality of heat sinks (221) that protrude from the mounting plate (21) side toward the blower (24) side and are arranged with gaps (Q1) between them. The first vent (24a) on the heat dissipation block (22) side of the blower (24) faces the gaps (Q1) between the plurality of heat sinks (221).

[0106] With this configuration, the blower (24) can efficiently exhaust the hot air that accumulates between the multiple heat sinks (221).

[0107] In the third embodiment of the lighting device (A1), the multiple heat sinks (221) are parallel to each other, as in the first or second embodiment.

[0108] This configuration allows hot air to flow smoothly between multiple heat sinks (221).

[0109] In the fourth embodiment, the lighting device (A1) has, in the second or third embodiment, an opening (221e) among the plurality of heat sinks (221), at least one of the heat sinks (221) arranged at both ends.

[0110] With this configuration, the opening (221e) allows outside air (cold air) to be efficiently ventilated between the multiple heat sinks (221) of the heat dissipation block (22). As a result, the heat dissipation performance of the heat dissipation block (22) can be improved.

[0111] In the fifth embodiment of the lighting device (A1), in any one of the first to fourth embodiments, the housing (1) has a plurality of ventilation holes (102). The light source unit (2) is movable along a first direction (front-back direction) between a first position, which is furthest from the outlet (110) from which the light source is emitted in the housing (1), and a second position, which is closest to the outlet (110). In the housing (1), the area scanned by the heat dissipation block (22) when the light source unit (2) moves between the first and second positions, as viewed from a direction perpendicular to the first direction (up and down direction), is defined as the moving region (W10). The plurality of ventilation holes (102) include ventilation holes (102) located in the moving region (W10) of the housing (1).

[0112] In this configuration, the multiple ventilation holes (102) include ventilation holes (102) located in the moving area (W10) of the housing (1) (i.e., ventilation holes (102) that overlap with the heat dissipation block (22)). Therefore, hot air from the heat dissipation block (22) can be efficiently exhausted to the outside of the housing (1), and outside air can be efficiently drawn into the heat dissipation block (22). As a result, the heat dissipation performance of the heat dissipation block (22) can be improved.

[0113] In the sixth embodiment of the lighting device (A1), in the fifth embodiment, the moving region (W10) includes a first region (W1) and a second region (W2). In the housing (1), when viewed from a certain direction (up and down direction), the first region (W1) is the region that overlaps with the heat dissipation block (22) when the light source unit (2) is in a first position. The second region (W2) is the region that overlaps with the heat dissipation block (22) when the light source unit (2) is in a second position. The plurality of ventilation holes (102) include ventilation holes (102) located in the first region (W1) and ventilation holes (102) located in the second region (W2).

[0114] With this configuration, when the heat dissipation block (22) is in the first and second positions, the hot air from the heat dissipation block (22) can be efficiently exhausted to the outside of the enclosure (1), and outside air can be efficiently drawn into the heat dissipation block (22).

[0115] In the lighting device (A1) of the seventh embodiment, in the fifth or sixth embodiment, the light source unit (2) further comprises a partition member (25). The partition member (25) divides the internal space of the housing (1) into a first space (S1) on the side of the light source (20) and a second space (S2) on the side of the heat dissipation block (22). When the light source unit (2) is in the first position, the plurality of ventilation holes (102) are located on the side of the heat dissipation block (22) rather than the partition member (25).

[0116] With this configuration, when the light source unit (2) is in the first position, it is possible to suppress ambient light from entering the second space (S2) inside the housing (1) and from entering the first space (S1) from the second space (S2). In addition, it is possible to suppress light from the light source (20) from entering the second space (S2) inside the housing (1) and leaking out of the housing (1).

[0117] In the lighting device (A1) of the eighth embodiment, in any one of the fifth to seventh embodiments, the heat dissipation block (22) has a plurality of heat sinks (221) that protrude from the side of the mounting plate (21) toward the side of the blower (24). The plurality of ventilation holes (102) include elongated holes that are long along the protruding direction of the heat sinks (221).

[0118] This configuration prevents the ventilation holes (102) from intersecting the heat sinks (221) in the gaps (Q1) between the multiple heat sinks (221). This prevents the ventilation holes (102) from being partially blocked by the intersection with the heat sinks (221). As a result, a decrease in the heat dissipation performance of the heat sink block (22) can be suppressed.

[0119] In the lighting device (A1) of the ninth embodiment, in the second embodiment, each of the multiple heat sinks (221) has a first side (221b) and a second side (221a). The first side (221b) faces the blower (24). The second side (221a) faces the mounting plate (21). The first side (221b) is inclined with respect to the second side (221a).

[0120] With this configuration, the width (D1) of the heat sink (221) in the first direction (front-to-back direction) can be monotonically increased or decreased in the vertical direction of the heat sink (221). This allows the heat dissipation characteristics of the heat sink block (22) to be adjusted by the blower (24).

[0121] In the lighting device (A1) of the tenth embodiment, as in the ninth embodiment, the housing (1) has a plurality of ventilation holes (102). The housing (1) has a first wall surface (1a) and a second wall surface (1b) that face each other in an orthogonal direction that is perpendicular to both a first direction (front-to-back direction) and the lateral direction (left-to-right direction) of the housing (1) that is perpendicular to the first direction. The number of ventilation holes (102) provided on the first wall surface (1a) is greater than the number of ventilation holes (102) provided on the second wall surface (1b). The width (D1) of the heat sink (221) in the first direction (front-to-back direction) is larger from the side of the second wall surface (1b) to the side of the first wall surface (1a).

[0122] In this configuration, the width (D1) of the heat sink (221) in the first direction (front-to-back direction) is larger from the second wall surface (1b) side (bottom side) to the first wall surface (1a) side (top side). As a result, the hot air generated on the heat sink (221) tends to accumulate on the first wall surface (1a) side (the side with the wider width (D1)) of the heat dissipation block (22). Consequently, the hot air accumulated on the first wall surface (1a) side of the heat dissipation block (22) can be efficiently exhausted by the blower (24).

[0123] In the 11th embodiment of the lighting device (A1), in the 9th or 10th embodiment, the first side (221b) is inclined with respect to the first direction (front-to-back direction).

[0124] With this configuration, the dead space created on the first side (221b) can be used as space for the blower (24).

[0125] In the lighting device (A1) of the twelfth embodiment, in the second embodiment, the first vent (24a) on the side of the heat dissipation block (22) of the blower (24) is located within the range of the heat dissipation block (22) when viewed from the first direction (front-to-back direction).

[0126] This configuration prevents the first vent (24a) of the blower (24) from extending beyond the range of the heat dissipation block (22) when viewed from the first direction (front-to-back direction). This allows for efficient exhaust of hot air from within the heat dissipation block (22).

[0127] In the lighting device (A1) of the 13th embodiment, in the 12th embodiment, when viewed from a first direction (front-to-back direction), the number of heat sinks (221) that overlap the first vent (24a) of the blower (24) is greater than the number of heat sinks (221) that do not overlap the first vent (24a).

[0128] With this configuration, it is possible to prevent the first vent (24a) of the blower (24) from becoming too small compared to the size of the rear surface (22a) of the heat dissipation block (22) when viewed from the first direction. As a result, the blower (24) can effectively improve the heat dissipation performance of the heat dissipation block (22).

[0129] In the lighting device (A1) of the 14th embodiment, as in the 12th or 13th embodiment, the housing (1) has a plurality of ventilation holes (102). The housing (1) has a first wall surface (a) and a second wall surface (1b) that face each other in an orthogonal direction that is perpendicular to both a first direction (front-to-back direction) and the lateral direction (left-to-right direction) of the housing (1) that is perpendicular to the first direction. The number of ventilation holes (102) provided on the first wall surface (1a) is greater than the number of ventilation holes (102) provided on the second wall surface (1b). The blower (24) is positioned on the opposite side from the mounting plate (21) of the heat dissipation block (22), and when viewed from the first direction, the center (Y1) of the first ventilation opening (24a) of the blower (24) is positioned at an overlapping position where it coincides with the center (Y2) of the light source (20), or it is positioned on the side of the first wall surface (1a) that is closer to the overlapping position.

[0130] In this configuration, the hot air generated by the light source (20) tends to accumulate in the heat dissipation block (22) on the side of the first wall (1a) (upper side) rather than on the light source (20). As a result, the blower (24) can efficiently exhaust the hot air generated by the light source (20).

[0131] In the lighting device (A1) of the 15th embodiment, in any one of the first to 14th embodiments, the light source unit (2) further comprises a partition member (25). The partition member (25) divides the internal space of the housing (1) into a first space (S1) on the side of the light source (20) and a second space (S2) on the side of the heat dissipation block (22).

[0132] With this configuration, the partition member (25) prevents foreign matter (dust and debris) and hot air generated by the heat dissipation block (22) from entering the first space (S1) from the second space (S2) of the housing (1).

[0133] In the lighting device (A1) of the 16th embodiment, the partition member (25) has light-shielding properties, as in the 15th embodiment.

[0134] With this configuration, the partition member (25) can prevent external light from entering the second space (S2) inside the housing (1) and from entering the first space (S1) from the second space (S2). In addition, the partition member (25) can prevent light from the light source (20) from entering the second space (S2) inside the housing (1) and leaking out of the housing (1).

[0135] In the lighting device (A1) of the 17th embodiment, the partition member (25) and the mounting plate (21) are each thermally conductive, as in the 15th or 16th embodiment. The partition member (25) is in contact with the mounting plate (21).

[0136] This configuration allows the heat capacity of the mounting plate (21) to be increased by the amount of the heat capacity of the partition member (25). As a result, the heat from the light source (20) can be quickly dissipated to the mounting plate (21).

[0137] In the lighting device (A1) of the 18th embodiment, the housing (1) is thermally conductive, as in the 17th embodiment. The partition member (25) is in contact with the housing (1).

[0138] This configuration allows the heat capacity of the mounting plate (21) to be further increased by the amount of the heat capacity of the housing (1). As a result, the heat from the light source (20) can be dissipated to the mounting plate (21) more quickly. In addition, the contact between the housing (1) and the partition member (25) reduces the gap between the housing (1) and the partition member (25). This prevents foreign matter from entering the first space (S1) from the second space (S2) inside the housing (1). Furthermore, it prevents ambient light from entering the second space (S2) inside the housing (1) and entering the first space (S1) from the second space (S2). Furthermore, it prevents light from the light source (20) from leaking from the first space (S1) inside the housing (1) into the second space (S2).

[0139] In the lighting device (A1) of the 19th embodiment, in any one of the 15th to 18th embodiments, the partition member (25) protrudes from the mounting plate (21) to the outer circumference of the mounting plate (21).

[0140] With this configuration, the partition member (25) can effectively seal the gap between the mounting plate (21) and the housing (1).

[0141] In the lighting device (A1) of the 20th embodiment, in the first embodiment, the blower (24) is an axial-flow type blower (24).

[0142] With this configuration, the blower (24) can efficiently exhaust the hot air from the heat dissipation block (22). [Explanation of Symbols]

[0143] 1 cabinet 2 Light source units 21 Mounting plate 22 Heat dissipation block 22a Rear 24 Blower 24a First vent 25 Partition Members 31 Upper plate section (first plate section) 32 Left side plate (second plate) 33 Right side plate part (3rd plate part) 34. Second partition plate (fourth plate section) 102 Ventilation holes 221 Heat sink 221a Front edge (second edge) 221b Rear edge (first edge) 221e opening A1 Lighting device Q1 Gap S1 1st space S2 2nd space W10 Moving area W1 1st area W2 2nd area Y1 center Y2 center

Claims

1. Light source unit, The system comprises a housing for the aforementioned light source unit, The aforementioned light source unit is A mounting plate having a first main surface and a second main surface facing each other, A light source arranged on the first main surface of the mounting plate, A heat dissipation block is disposed on the second main surface of the mounting plate, A blower positioned on the opposite side of the mounting plate in the heat dissipation block, The enclosure comprises a partition member that divides the internal space of the enclosure into a first space on the side of the light source and a second space on the side of the heat dissipation block, The light source unit is movable relative to the housing in a first direction in which the mounting plate, the light source, the heat dissipation block, and the blower are aligned. The partition member has light-shielding properties, The partition member and the mounting plate each have thermal conductivity, The partition member is in contact with the mounting plate. The housing has thermal conductivity, The partition member is in contact with the housing so as to be movable relative to the housing. Lighting device.

2. The heat dissipation block has a plurality of heat dissipation plates that protrude from the mounting plate side toward the blower side and are arranged with gaps between them. The first vent on the heat dissipation block side of the blower faces the gap between the plurality of heat dissipation plates. The lighting device according to claim 1.

3. The aforementioned plurality of heat sinks are parallel to each other. The lighting device according to claim 2.

4. Of the plurality of heat sinks, at least one of the heat sinks lined up at both ends has an opening. The lighting device according to claim 2 or 3.

5. The housing has a plurality of ventilation holes, The light source unit is movable along the first direction between a first position, which is furthest from the outlet from which the light source is emitted in the housing, and a second position, which is closest to the outlet. In the housing, the region scanned by the heat dissipation block when the light source unit moves between the first position and the second position, as viewed from a direction perpendicular to the first direction, is defined as the moving region. The plurality of ventilation holes include ventilation holes arranged in the movable region of the housing, The lighting device according to claim 1.

6. The aforementioned moving region includes a first region and a second region, In the housing, when viewed from a certain direction, the first region is the region that overlaps with the heat dissipation block when the light source unit is in the first position, and the second region is the region that overlaps with the heat dissipation block when the light source unit is in the second position. The plurality of ventilation holes include ventilation holes located in the first region and ventilation holes located in the second region. The lighting device according to claim 5.

7. When the light source unit is in the first position, the plurality of ventilation holes are located on the side of the heat dissipation block that is closer to the partition member. The lighting device according to claim 5 or 6.

8. The heat dissipation block has a plurality of heat dissipation plates that protrude from the mounting plate side toward the blower side, The plurality of ventilation holes include elongated holes that are long along the protruding direction of the heat sink. The lighting device according to claim 5.

9. Each of the aforementioned heat sinks is The first side facing the blower, It has a second side facing the mounting plate, The aforementioned first side is inclined relative to the aforementioned second side. The lighting device according to claim 2.

10. The housing has a plurality of ventilation holes, The housing has a first wall surface and a second wall surface that face each other in an orthogonal direction that is perpendicular to both the first direction and the lateral direction of the housing which is perpendicular to the first direction. The number of ventilation holes provided on the first wall surface is greater than the number of ventilation holes provided on the second wall surface. The width of the heat sink in the first direction increases from the side of the second wall to the side of the first wall. The lighting device according to claim 9.

11. The first side is inclined with respect to the first direction. The lighting device according to claim 9 or 10.

12. The first vent on the heat dissipation block side of the blower is located within the range of the heat dissipation block when viewed from the first direction. The lighting device according to claim 2.

13. When viewed from the first direction, the number of heat sinks that overlap the first vent of the blower is greater than the number of heat sinks that do not overlap the first vent. The lighting device according to claim 12.

14. The housing has a plurality of ventilation holes, The housing has a first wall surface and a second wall surface that face each other in an orthogonal direction that is perpendicular to both the first direction and the lateral direction of the housing which is perpendicular to the first direction. The number of ventilation holes provided on the first wall surface is greater than the number of ventilation holes provided on the second wall surface. The blower is positioned on the opposite side of the heat dissipation block from the mounting plate, such that, when viewed from the first direction, the center of the first vent of the blower is in a superimposed position that coincides with the center of the light source, or it is positioned closer to the first wall surface than the superimposed position. The lighting device according to claim 12 or 13.

15. The partition member protrudes from the mounting plate to the outside of the mounting plate, A lighting device according to any one of claims 1 to 3.

16. The blower is an axial flow type blower. The lighting device according to claim 1.

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