Luminaire

Abstract

To improve heat dissipation performance while restraining an increase in size.SOLUTION: A luminaire 1 comprises a light source part 120 for applying light frontward, and a case 110 holding the light source part 120. The light source part 120 comprises a plurality of light emitting elements 121, and a mounting board 122 on which the plurality of light emitting elements 121 are mounted. The case 110 comprises a case body 111, an extended part 112 extended outward from a peripheral edge of the case body 111, and a protruding piece 112a protruding from a tip of the extended part 112. The case 110 is thermally connected to the light source part 120.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present disclosure relates to a lighting fixture, and particularly to a lighting fixture used for floodlighting.

Background Art

[0002] Conventionally, lighting fixtures used for floodlighting are known. For example, Patent Document 1 discloses a lighting fixture (hereinafter referred to as a conventional example) including a housing formed in a box shape, an LED block housed in the housing, and a cover block covering an opening on the front surface of the housing.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the conventional example, heat generated from an LED block or the like is dissipated by the housing and a heat dissipation member provided on the back surface of the housing.

[0005] However, in order to improve the heat dissipation performance in the conventional example, for example, increasing the size of the heat dissipation member may lead to an increase in the overall size of the lighting fixture.

[0006] An object of the present disclosure is to provide a lighting fixture capable of improving heat dissipation performance while suppressing an increase in size.

Means for Solving the Problems

[0007] A lighting fixture according to one aspect of the present disclosure includes a light source unit that irradiates light forward, and a housing that holds the light source unit. The light source unit has a plurality of light emitting elements and a mounting substrate on which the plurality of light emitting elements are mounted. The housing has a housing main body, an extending portion that extends outward from the periphery of the housing main body, and a protruding piece that protrudes from the tip of the extending portion. The housing is thermally connected to the light source unit.

Effects of the Invention

[0008] According to the lighting fixture according to the above aspect, it is possible to provide a lighting fixture that can improve heat dissipation while suppressing an increase in size.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Embodiments for Carrying Out the Invention

[0010] Hereinafter, a lighting fixture according to an embodiment of the present disclosure will be described with reference to the drawings. Note that each of the embodiments described below shows a preferred specific example of the present disclosure. Therefore, the numerical values, materials, components, arrangements of components, connection forms, processes, order of processes, etc. shown in the following embodiments are merely examples and are not intended to limit the present disclosure. Thus, among the following embodiments, components not described in the independent claims indicating the highest-level concept of the present disclosure are described as optional components. Note that each of the drawings referred to in the following embodiments is a schematic diagram and is not necessarily strictly illustrated. That is, the respective ratios of the sizes and thicknesses of the components in the drawings do not necessarily reflect the actual dimensional ratios.

[0011] (1) Description of Embodiment FIG. 1 is a side view of a lighting fixture 1 (hereinafter abbreviated as lighting fixture 1) according to the embodiment. FIG. 2 is a front view of the lighting fixture 1. FIG. 3 is an exploded perspective view of the lighting fixture 1. The lighting fixture 1 is a projector mainly used for lighting (projective lighting) in soccer stadiums, various arenas, school playgrounds, etc. However, the present disclosure is also applicable to lighting fixtures other than projectors, for example, so-called high-ceiling lighting fixtures installed on the ceilings of gymnasiums.

[0012] As shown in FIGS. 1 to 3, the lighting fixture 1 includes a main body portion 100, a frame portion 300, a sealing member 600 that seals the gap between the main body portion 100 and the frame portion 300, and an arm portion 200 that rotatably supports the main body portion 100. The lighting fixture 1 further includes an angle fixing portion 500 that fixes the main body portion 100 and the arm portion 200 at a desired rotation angle, and a screw portion 400 for rotatably supporting the main body portion 100 and the arm portion 200. The irradiation angle of the light source portion 120 provided in the main body portion 100 can be adjusted by the arm portion 200. Hereinafter, each component of the lighting fixture 1 will be described in detail. In the following description, the light irradiation direction of the lighting fixture 1 is defined as the Z-axis direction, the axial direction of the rotation axis of the main body portion 100 with respect to the arm portion 200 is defined as the X-axis direction, and the direction orthogonal to the Z-axis direction and the X-axis direction is defined as the Y-axis direction. Also, the directions of the arrows in FIGS. 1 to 6 indicate the positive directions of the X-axis, Y-axis, and Z-axis, respectively.

[0013] (1-1) Main body portion FIG. 5 is a cross-sectional view of the lighting fixture 1 in the XZ plane. As shown in FIGS. 3 and 5, the main body portion 100 includes a light source portion 120 that irradiates light forward (in the positive direction of the Z-axis), a housing 110 that holds the light source portion 120, a power supply portion 130 that lights the light source portion 120, and a lens portion 140 disposed in front of the light source portion 120.

[0014] (1-1-1) Light source portion As shown in FIG. 3, the light source portion 120 includes two LED modules, a heat sink 123 to which the two LED modules are attached, and an insulating sheet 124 disposed between the two LED modules and the heat sink 123.

[0015] The two LED modules each have a plurality of light emitting elements 121 and a rectangular flat mounting substrate 122. The plurality of light emitting elements 121 are, for example, package-type white light emitting diodes that emit white light. However, the plurality of light emitting elements 121 may be COB (chip-on-board) type light emitting diodes. Also, the plurality of light emitting elements 121 may include light emitting diodes of a plurality of emission colors other than white.

[0016] The mounting substrate 122 is composed of, for example, an aluminum substrate in which a conductor (copper foil) is formed on the surface of a substrate made of aluminum or an aluminum alloy via an insulating film. However, the mounting substrate 122 is not limited to an aluminum substrate, and a synthetic resin substrate or a ceramic substrate may also be used.

[0017] The insulating sheet 124 is formed in a quadrilateral shape from a synthetic resin material having electrical insulation properties.

[0018] The heat sink 123 is formed in a flat plate shape with four sides by a metal plate that is a good conductor of heat, for example, a plate made of aluminum or an aluminum alloy. The insulating sheet 124 is disposed on the front surface of the heat sink 123, and two LED modules are disposed on the front surface of the insulating sheet 124. The two LED modules are arranged side by side in the Y-axis direction so that the longitudinal direction of the mounting substrate 122 coincides with the X-axis direction. Further, the two LED modules are screwed and fixed to the heat sink 123 by a plurality of pressing members 125 having electrical insulation properties and a plurality of fixing screws 126. That is, the plurality of light-emitting elements 121 are thermally connected to the heat sink 123 via the mounting substrate 122 and the insulating sheet 124. Therefore, a part of the heat generated by the plurality of light-emitting elements 121 is conducted to the heat sink 123 and dissipated. In this embodiment, "thermally connected" means a state in which heat conduction is possible between two or more objects, and is not limited to a state in which two or more objects are in direct contact, but also includes a state in which heat conduction is possible through an object having a high thermal conductivity, for example, metal or synthetic resin.

[0019] (1-1-2) Power supply unit As shown in FIG. 3, the power supply unit 130 includes a circuit board 131, a plurality of circuit elements 132 mounted on the circuit board 131, and a mounting base 133. The plurality of circuit elements 132 are circuit elements that constitute a power supply circuit described later, and include resistors, inductors, capacitors, integrated circuits, and the like.

[0020] The power supply unit 130 includes an AC / DC converter and a switching power supply circuit. The AC / DC converter includes a rectifier, a smoothing capacitor, and a filter. The rectifier is composed of a diode bridge and converts an alternating current into a pulsating direct current. The smoothing capacitor is composed of an electrolytic capacitor and smooths the pulsating direct current to convert it into a direct current. Further, the filter is composed of a choke coil and removes high-frequency noise and the like. The power supply unit 130 converts an alternating voltage (for example, an alternating voltage with an effective value of 100V or 200V) supplied from a commercial alternating current power supply into a direct current voltage by the AC / DC converter. Further, the power supply unit 130 converts the direct current input from the AC / DC converter into a predetermined direct current by the switching power supply circuit and outputs it to the two LED modules of the light source unit 120. As a result, a constant current flows through the plurality of light-emitting elements 121, and the light source unit 120 can emit predetermined light. That is, the power supply unit 130 has a function of converting an alternating current supplied from the outside into a direct current suitable for the light emission of the light source unit 120 and a function of supplying the converted direct current to the light source unit 120. However, the power supply unit 130 may have a function of receiving a control signal transmitted from an external controller and dimming the light source unit 120 by increasing or decreasing the output current of the switching power supply circuit according to the received control signal.

[0021] The circuit board 131 is attached to a mounting base 133 formed of a material having electrical insulation properties such as synthetic resin (see FIGS. 3 and 4). Then, the mounting base 133 to which the circuit board 131 is attached is screwed and fixed to the front surface of the bottom surface portion 111c of the housing main body 111 as will be described later (see FIG. 4). That is, the power supply unit 130 is housed in the housing 110.

[0022] (1-1-3) Lens unit As shown in FIGS. 3 and 5, the lens unit 140 includes a main body 141, a plurality of lenses 142, and an edge portion 143 provided on the outer periphery of the main body 141. In the present embodiment, the lens unit 140 corresponds to a light-transmitting member.

[0023] The lens unit 140 is formed of a synthetic resin material having translucency such as acrylic resin or polycarbonate resin. The main body 141 is formed in a flat plate shape of a quadrilateral (for example, a square). The vertical and horizontal dimensions of the main body 141 are larger than the vertical and horizontal dimensions of the light source unit 120. The plurality of lenses 142 are integrally formed side by side in the vertical direction (Y-axis direction) and the horizontal direction (X-axis direction) on the rear surface of the main body 141 (the surface facing the negative direction of the Z-axis). However, these plurality of lenses 142 are arranged at positions one-to-one opposed to the plurality of light emitting elements 121 of the LED module on the rear surface of the main body 141. Each of the plurality of lenses 142 is provided so as to protrude rearward (in the negative direction of the Z-axis) from the rear surface of the main body 141. Each lens 142 is configured to condense the light emitted from the light emitting element 121. The edge portion 143 is integrally formed with the main body 141 so as to protrude outward from the rear ends of the four sides of the main body 141.

[0024] (1-1-4) Housing FIG. 4 is a perspective view of the housing 110 of the lighting fixture 1. As shown in FIGS. 3 to 5, the housing 110 includes a housing main body 111, an extension portion 112, and a plurality of heat dissipation portions 113.

[0025] The housing main body 111 is formed in a box shape having a bottom surface portion 111c in a quadrilateral plate shape and four side surface portions 111b in a quadrilateral plate shape protruding forward (in the positive direction of the Z-axis) from each side of the bottom surface portion 111c. The housing main body 111 has an opening 111a surrounded by the front ends of the four side surface portions 111b.

[0026] As shown in FIG. 3, the extension portion 112 extends outward from the front ends of the four side surface portions 111b. That is, the extension portion 112 extends in a direction (X-axis direction and Y-axis direction) orthogonal to the optical axis (Z-axis) of the light source unit 120.

[0027] The bottom surface portion 111c, the four side surface portions 111b, and the extension portion 112 of the housing body 111 are preferably integrally formed by drawing a metal plate (for example, a plate made of aluminum or an aluminum alloy) that is a good conductor of heat. However, the extending direction of the extension portion 112 does not necessarily have to coincide with the X-axis direction and the Y-axis direction, and it may be slightly inclined (for example, by an angle of the draft of the mold in the drawing process) with respect to at least one of the X-axis and the Y-axis.

[0028] The shape of the outer edge of the extension portion 112 is rectangular, for example, square. Further, the extension portion 112 is formed in a rectangular frame shape so as to surround the entire circumference of the opening portion 111a of the housing body 111. Note that the thickness (plate thickness) of the extension portion 112 may be equal to the thickness of the housing body 111 (the plate thickness of the bottom surface portion 111c and the side surface portions 111b), or may be thicker than the thickness of the housing body 111.

[0029] Further, the housing 110 has a pair of projecting pieces 112a and a pair of bent portions 112b (see FIGS. 3 and 4). The pair of projecting pieces 112a are formed in a rectangular plate shape having a depression in the center in the longitudinal direction. The pair of projecting pieces 112a project rearward (in the negative direction of the Z-axis) from both ends in the X-axis direction in the extension portion 112 (see FIGS. 3 and 4).

[0030] The pair of bent portions 112b are formed in the shape of a rectangular plate with a width narrower than that of the protruding pieces 112a. The pair of bent portions 112b protrude rearward from both ends of the extending portion 112 in the Y-axis direction. Here, both the pair of protruding pieces 112a and the pair of bent portions 112b are integrally formed with the housing 110 by bending a metal plate of the material when the housing 110 is formed. The housing 110 aims to improve mechanical strength by the pair of protruding pieces 112a and the pair of bent portions 112b. Also, the housing 110 aims to improve heat dissipation by increasing the surface area mainly by the pair of protruding pieces 112a. Further, since the pair of protruding pieces 112a and the pair of bent portions 112b protrude rearward from both ends of the extending portion 112, there is no possibility of blocking the irradiation light of the light source unit 120 attached to the extending portion 112 as described later. Note that the protruding dimension (width dimension in the Z-axis direction) of the pair of protruding pieces 112a may be larger than the width dimension of the side surface portion 111b of the housing main body 111. Also, the protruding dimension of the pair of bent portions 112b may be equal to or greater than the width dimension of the pair of protruding pieces 112a. Furthermore, the thickness of each of the pair of protruding pieces 112a and the pair of bent portions 112b may be equal to the thickness of the extending portion 112, or may be thicker than the thickness of the extending portion 112.

[0031] Thus, the lighting fixture 1 can increase the surface area of the housing 110 and improve heat dissipation by providing the extending portion 112 and the pair of protruding pieces 112a on the housing main body 111. Also, the lighting fixture 1 may further improve heat dissipation by increasing the surface area of the protruding pieces 112a by providing one or more holes in the pair of protruding pieces 112a.

[0032] As shown in FIGS. 3 to 5, the plurality of heat radiating portions 113 are provided so as to project in the negative Z-axis direction from the rear surface of the bottom surface portion 111c of the housing body 111. These heat radiating portions 113 are formed, for example, in a quadrilateral flat plate shape by an aluminum alloy. The plurality of heat radiating portions 113 are attached to the bottom surface portion 111c so as to be parallel to the YZ plane. Thereby, the contact surface with the outside air of the housing 110 increases, and heat can be radiated efficiently. Further, the plurality of heat radiating portions 113 are provided so as to be parallel to the Y-axis direction (vertical direction), so that outside air can convect through between the plurality of heat radiating portions 113 to further enhance the heat radiation effect.

[0033] Here, the power supply unit 130 is attached to the front surface of the bottom surface portion 111c. That is, the housing body 111 houses the power supply unit 130 therein.

[0034] (1-2) Frame portion FIG. 6 is a cross-sectional view of a main part (a coupling portion between the frame portion 300 and the arm portion 200) of the lighting fixture 1. As shown in FIGS. 3, 4, and 6, the frame portion 300 has a frame body 310 and a pair of arm receiving portions 320. The frame portion 300 holds the lens portion 140 and is attached to the main body portion 100.

[0035] As shown in FIG. 3, the frame body 310 has a front wall 310a formed in a quadrilateral frame shape and a side wall 310b that projects rearward over the entire outer peripheral edge of the front wall 310a. Further, arm receiving portions 320 are provided one by one at the lower portions (ends in the negative Y-axis direction) at both ends in the X-axis direction of the side wall 310b (see FIGS. 3 and 4).

[0036] As shown in FIGS. 3 to 5, each arm receiving portion 320 has a cylindrical attachment portion 321, a screw hole 322 provided at the center of the attachment portion 321, and a support piece 323 that reinforces the attachment portion 321. The pair of arm receiving portions 320 are integrally formed with the front wall 310a and the side wall 310b by, for example, aluminum alloy die casting.

[0037] As shown in FIG. 3, a semi-circular scale plate 330 is attached to the arm receiving portion 320 on the negative X-axis side among the pair of arm receiving portions 320. A circular second through hole 331 is provided at the center position of the arc of the scale plate 330. The scale plate 330 has a semi-circular arc-shaped first long hole 332 centered on the second through hole 331. Further, the scale plate 330 has three positioning holes 333 arranged at equal intervals on the circumference centered on the second through hole 331. On the other hand, the arm receiving portion 320 to which the scale plate 330 is attached has three ribs 324 that are inserted one by one into the three positioning holes 333 of the scale plate 330 (see FIG. 3). These three ribs 324 project in the negative X-axis direction and are arranged at equal intervals on the circumference centered on the screw hole 322. That is, the scale plate 330 is positioned with respect to the arm receiving portion 320 by inserting the ribs 324 one by one into the three positioning holes 333. Note that an angle scale centered on the second through hole 331 is engraved on the scale plate 330, and it is configured to be able to read the angle (rotation angle) of the main body portion 100 with respect to the arm piece 220.

[0038] (1-3) Sealing member The sealing member 600 is formed of silicone rubber into a quadrilateral frame shape when viewed from the Z direction. However, the sealing member 600 may be formed of an elastic material other than silicone rubber.

[0039] A groove 601 is formed on the entire inner peripheral surface of the sealing member 600 (see FIG. 5). Further, ribs 602 are formed on the entire front surface, rear surface, and inner wall surface of the groove 601 of the sealing member 600.

[0040] The sealing member 600 is attached to the lens portion 140 so as to surround the four circumferences of the lens portion 140 with the edge portion 143 inserted into the groove 601 (see FIGS. 4 and 5).

[0041] (1-4) Arm portion As shown in FIGS. 3 and 4, the arm portion 200 includes a fixed plate 210, a pair of arm pieces 220 that rise upward (in the positive direction of the Y-axis) from both left and right ends (both ends in the X-axis direction) of the fixed plate 210, a mounting portion 230 provided at the tip of each of the pair of arm pieces 220, and an indicating portion 240 provided on one of the arm pieces 220. The fixed plate 210, the arm pieces 220, the mounting portion 230, and the indicating portion 240 are integrally formed of a metal plate.

[0042] As shown in FIG. 3, the fixed plate 210 has a fixing hole 211 and a second long hole 212. The fixing hole 211 is a circular hole that penetrates the approximate center of the fixed plate 210. The second long hole 212 is a long hole that penetrates in a semi-circular arc shape centered on the fixing hole 211 in the negative direction of the Z-axis on the fixed plate 210. The fixed plate 210 is fixed to a lighting stand or the like using a bolt inserted through the fixing hole 211 and a bolt inserted through the second long hole 212. Also, the fixed plate 210 is rotatable about the bolt inserted through the fixing hole 211 with the nuts tightened on each bolt loosened. That is, by rotating the fixed plate 210, the direction of the light irradiated from the light source unit 120 can be changed in the horizontal direction (around the Y-axis).

[0043] As shown in FIG. 3, the mounting portion 230 is formed in a semi-circular shape and is provided one by one at the tips of the pair of arm pieces 220. Circular third through-holes 231 are respectively provided at the tip portions of each mounting portion 230.

[0044] The indicating portion 240 is formed in a substantially trapezoidal shape when viewed from the X-axis direction. The indicating portion 240 protrudes rearward from the rear edge at the tip of one of the arm pieces 220. The upper edge of the indicating portion 240 overlaps the surface (the surface with graduations marked) of the scale plate 330 in a plan view from the X-axis direction. That is, the indicating portion 240 can indicate the angle by which the main body portion 100 is rotated with respect to the arm portion 200 by the graduations of the scale plate 330 that overlap the upper edge of the indicating portion 240.

[0045] The arm unit 200 is rotatably attached to the frame unit 300 by screwing the screw unit 400, which is inserted through the third through-hole 231 via a spacer, into the screw hole 322 of each mounting unit 321. Here, the arm unit 200 is thermally connected to the frame unit 300 via the screw unit 400. As a result, heat generated by the light source unit 120 is also conducted from the frame unit 300 to the arm unit 200, thereby improving heat dissipation.

[0046] (1-5) Angle fixing part 3, angle fixing part 500 has handle 510 and fixing bracket 511, and is configured to fix (lock) the rotation of main body part 100 relative to arm part 200. Handle 510 is formed by bending a metal rod into an L-shape. A male screw is integrally formed at the tip of handle 510.

[0047] The fixing metal fitting 511 is formed in a square gutter shape from a metal plate. The fixing metal fitting 511 has a through hole at one end in the longitudinal direction of the bottom surface, and has a protrusion 511a for preventing rotation at the other end in the longitudinal direction (see FIG. 4).

[0048] The angle fixing part 500 accommodates the nut 512 inside the fixing bracket 511 (see FIG. 4), and after the protrusion 511a is inserted and hooked into the hole 241 provided in the indication part 240, the male screw of the handle 510 is inserted into the through hole of the fixing bracket 511 through the hole 242 provided in the indication part 240. The angle fixing part 500 is then attached to the indication part 240 (arm part 200) by tightening the nut 512 onto the male screw protruding to the inside of the fixing bracket 511 (see FIG. 4). The nut 512 is prevented from rotating by abutting against the inner surface of the fixing bracket 511. The scale plate 330 is inserted into the gap between the fixing bracket 511 and the indication part 240 (see FIG. 4).

[0049] Thus, when the handle 510 rotates clockwise as viewed from the positive direction of the X-axis, the angle fixing portion 500 prevents the nut 512 and the fixing fitting 511 from rotating, causing the fixing fitting 511 to move in a direction approaching the indicating portion 240. The scale plate 330 is clamped and fixed between the fixing fitting 511 and the indicating portion 240. Here, the scale plate 330 is fixed to the mounting portion 321 of the frame portion 300. As a result, the angle fixing portion 500 can fix the main body portion 100 to the arm portion 200 via the scale plate 330. When the handle 510 rotates counterclockwise, the angle fixing portion 500 causes the fixing fitting 511 to move away from the indicating portion 240, allowing the scale plate 330 (main body portion 100) to rotate relative to the arm portion 200.

[0050] (1-6) Connection relationship between the light source unit and the main body unit As shown in FIGS. 4 and 5, the light source unit 120 is attached to the main body unit 100 by screwing a heat sink plate 123 to the extension portion 112 of the main body unit 100. That is, a plurality of screw insertion holes 123a are provided at the peripheral portion of the heat sink plate 123, and a plurality of fixing screws 123b, each inserted into one of the plurality of screw insertion holes 123a, are screwed into a plurality of female screw portions 112c provided in the extension portion 112 (see FIG. 3). Thereby, the light source unit 120 is fixed to the extension portion 112 by a plurality of fixing screws 123b. Thus, the light source unit 120 is mechanically and thermally connected to the extension portion 112. Moreover, since the heat sink plate 123 of the light source unit 120 is in surface contact with the extension portion 112, the heat generated by the light source unit 120 is efficiently conducted to the housing main body 111 via the extension portion 112. As a result, the lighting fixture 1 can improve its heat dissipation performance.

[0051] As shown in FIG. 7, in a plan view from the Z-axis direction (the thickness direction of the mounting substrate 122), at least one of the plurality of light-emitting elements 121 (the light-emitting element 121 mounted on the peripheral portion of the mounting substrate 122) overlaps with the extending portion 112 of the housing 110. That is, the distance between one or more light-emitting elements 121 mounted on the peripheral portion of the mounting substrate 122 and the extending portion 112 is shorter than that of the other light-emitting elements 121. Therefore, the heat generated by one or more light-emitting elements 121 overlapping with the extending portion 112 can be efficiently conducted to the extending portion 112, and further improvement in heat dissipation can be achieved.

[0052] (1-7) Connection relationship between the lens portion 140, the sealing member, and the main body portion 100) As shown in FIG. 5, when the edge portion 143 is inserted into the groove 601, the sealing member 600 is mounted on the lens portion 140 so as to surround the periphery. At this time, the rib 602 formed on the inner wall surface of the groove 601 is pressed against the edge portion 143 and deformed, so that the gap between the inner wall surface of the groove 601 of the sealing member 600 and the edge portion 143 is sealed (see FIG. 5).

[0053] The lens portion 140 with the sealing member 600 mounted thereon is disposed on the front surface of the extending portion 112 so as to cover the front surface of the light source portion 120. Then, the frame portion 300 is covered on the lens portion 140 so as to accommodate the sealing member 600 in the space surrounded by its front wall 310a and side walls 310b (see FIGS. 4 and 5). Here, a plurality of screw holes are provided on the rear surface of the side wall 310b of the frame portion 300. On the other hand, a plurality of screw insertion holes 112d are provided on the peripheral portion of the extending portion 112 of the housing 110 (see FIG. 3). Then, from the rear of the extending portion 112, mounting screws 114 are inserted one by one into the plurality of screw insertion holes 112d, and the plurality of mounting screws 114 are screwed into the plurality of screw holes of the frame portion 300 one by one, whereby the frame portion 300 is attached to the extending portion 112 (see FIGS. 3, 5, and 6).

[0054] Here, in a state where the frame portion 300 is attached to the extension portion 112, the ribs 602 provided on the front and rear surfaces of the sealing member 600 are pressed against the front wall 310a and the extension portion 112 respectively and deformed, so that the gap between the lens portion 140 and the extension portion 112 and the frame portion 300 is sealed by the sealing member 600. That is, in the present embodiment, the plurality of mounting screws 114 correspond to the pressing member and the fastening member.

[0055] Thus, since the lighting fixture 1 seals the gap between the lens portion 140 and the extension portion 112 with the sealing member 600, the possibility that the two LED modules of the light source portion 120 which is the charging portion and the power supply portion 130 come into contact with rainwater can be reduced.

[0056] (1-8) Process of heat conduction in the embodiment (1-8-1) Heat conduction from the light source portion to the extension portion and the housing When the light source portion 120 is lit by the direct current supplied from the power supply portion 130, heat is generated in the light source portion 120. The heat generated in the light source portion 120 is conducted to the extension portion 112 through the heat dissipation plate 123. By providing the extension portion 112 which is thermally connected to the light source portion 120 on the main body portion 100, the lighting fixture 1 can conduct the heat generated by the light source portion 120 to the extension portion 112 for heat dissipation. Also, since some of the light emitting elements 121 overlap the extension portion 112 when viewed from the front, the distance of heat conduction from the light emitting elements 121 to the extension portion 112 is shortened. As a result, the heat generated by the light emitting elements 121 can be efficiently conducted to the extension portion 112. Further, a part of the heat conducted to the extension portion 112 is dissipated into the air, and the rest is conducted to the housing main body 111 and the heat dissipation portion 113. That is, by providing the extension portion 112 on the housing main body 111, the surface area of the housing 110 increases, so that the heat dissipation performance can be improved.

[0057] (1-8-2) Heat conduction from the extension portion to the frame portion The heat conducted to the extension part 112 is conducted to the frame part 300 that is thermally connected to the extension part 112. Then, part of the heat conducted to the frame part 300 is radiated from the frame part 300 into the air. Also, part of the heat conducted to the frame part 300 is conducted to the arm part 200 that is thermally connected to the frame part 300. Then, the heat conducted to the arm part 200 is radiated into the air. That is, since the heat conducted from the light source part 120 to the extension part 112 is thermally conducted to the arm part 200 and the frame part 300, and is further radiated from the arm part 200 and the frame part 300 into the air, the heat dissipation performance of the lighting fixture 1 can be improved. Of course, a path in which heat is conducted from the light source part 120 to the frame part 300 via the lens part 140 is also conceivable, but the path in which heat is conducted to the frame part 300 via the extension part 112 is dominant.

[0058] (1-8-3) Heat conduction from the extension part to the protruding piece The heat conducted to the extension part 112 is conducted to a pair of protruding pieces 112a that are integrally formed with the extension part 112. Then, part of the heat conducted to the pair of protruding pieces 112a is radiated into the air. That is, by providing the pair of protruding pieces 112a on the housing main body 111, the lighting fixture 1 can increase the surface area of the housing 110 and improve the heat dissipation performance. Note that the lighting fixture 1 dissipates heat not only from the pair of protruding pieces 112a but also from the pair of bending parts 112b, so that the heat dissipation performance can be further improved.

[0059] (2) Operational effects of the embodiment Next, the operational effects of the lighting fixture 1 configured as described above will be described.

[0060] As described above, the lighting fixture 1 includes a light source part 120 that irradiates light forward and a housing 110 that holds the light source part 120. The light source part 120 has a plurality of light emitting elements 121 and a mounting substrate 122 on which the plurality of light emitting elements 121 are mounted. The housing 110 has a housing main body 111, an extension part 112 that extends outward from the periphery of the housing main body 111, and a protruding piece 112a that protrudes from the tip of the extension part 112. And the housing 110 is thermally connected to the light source part 120.

[0061] According to this, the lighting fixture 1 can improve heat dissipation by increasing the surface area of the housing 110 by providing the protruding piece 112a protruding from the extending portion 112. Moreover, compared with the case where the heat dissipation portion 113 is enlarged, the enlargement of the housing 110 can be suppressed.

[0062] Also, the lighting fixture 1 integrally forms the protruding piece 112a with the extending portion 112.

[0063] According to this, the lighting fixture 1 can improve heat dissipation while suppressing an increase in the number of parts.

[0064] Also, the lighting fixture 1 protrudes the protruding piece 112a backward from the tip of the extending portion 112.

[0065] According to this, since the lighting fixture 1 protrudes the protruding piece 112a in a direction different from the direction (forward) in which the light source unit 120 emits light, there is no possibility that the light of the light source unit 120 is blocked by the protruding piece 112a.

[0066] Also, the lighting fixture 1 forms the protruding piece 112a in a long plate shape. Here, when the optical axis (Z-axis) of the light emitted from the light source unit 120 is parallel to the horizontal direction, the longitudinal direction of the protruding piece 112a is parallel to the vertical direction.

[0067] According to this, when the lighting fixture 1 dissipates heat, the outside air in contact with the protruding piece 112a rises in the vertical direction, so that the heated air can be circulated easily and heat can be dissipated efficiently.

[0068] Also, the lighting fixture 1 further includes a translucent member (lens unit 140) having translucency and disposed in front of the light source unit 120, and a frame unit 300 that holds the lens unit 140 and is attached to the extending portion 112. Further, the lighting fixture 1 thermally connects the extending portion 112 and the frame unit 300.

[0069] According to this, since the lighting fixture 1 thermally connects the extending portion 112 and the frame portion 300, by conducting the heat generated by the light source portion 120 not only to the main body portion 100 but also to the frame portion 300, further improvement in heat dissipation can be achieved.

[0070] Moreover, since the lighting fixture 1 directly contacts at least a part (side wall 310b) of the frame portion 300 and the extending portion 112, the heat generated in the light source portion 120 can be efficiently conducted to the frame portion 300, and further improvement in heat dissipation can be achieved.

[0071] In addition, since the lighting fixture 1 presses a part of the frame portion 300 in the direction approaching the extending portion 112 with a pressing member (mounting screw 114) provided in the main body portion 100, by increasing the degree of thermal connection between the frame portion 300 and the extending portion 112, further improvement in heat dissipation can be achieved.

[0072] Also, the lighting fixture 1 uses a fastening member (mounting screw 114) that fastens the frame portion 300 and the extending portion 112 as a pressing member. Therefore, the lighting fixture 1 can thermally connect and mechanically connect the frame portion 300 and the extending portion 112 by fastening them with the mounting screw 114. Since the lighting fixture 1 mounts the light source portion 120 on the front surface of the extending portion 112, it does not interfere with the emitted light from the light source portion 120 by the extending portion 112, and the light source portion 120 can be easily mounted.

[0073] Furthermore, the lighting fixture 1 mounts at least one of the plurality of light emitting elements 121 on the peripheral portion of the mounting substrate 122, and overlaps the peripheral portion with the extending portion 112 when viewed from the thickness direction of the mounting substrate 122. For this reason, the lighting fixture 1 can efficiently conduct the heat generated by the light emitting element 121 to the extending portion 112 by reducing the distance between the light emitting element 121 mounted on the peripheral portion and the extending portion 112, and further improvement in heat dissipation can be achieved.

[0074] In addition, the lighting fixture 1 further includes a heat sink 123 that is thermally connected to the mounting substrate 122 in the light source unit 120. Furthermore, the lighting fixture 1 thermally connects the heat sink 123 and the extending portion 112. Therefore, the lighting fixture 1 can efficiently conduct the heat from the light source unit 120 to the extending portion 112.

[0075] Note that even when the lighting fixture 1 does not include the lens unit 140, the provision of the protruding piece 112a can improve the heat dissipation. Therefore, the lighting fixture 1 may not include the lens unit 140.

[0076] In addition, even when the lighting fixture 1 does not include the arm unit 200, the provision of the protruding piece 112a can improve the heat dissipation. Therefore, the lighting fixture 1 may not include the arm unit 200.

[0077] Furthermore, even when the lighting fixture 1 does not include the frame unit 300, the provision of the protruding piece 112a can improve the heat dissipation. Therefore, the lighting fixture 1 may not include the frame unit 300.

[0078] (3) Modifications of the lighting fixture according to the embodiment As described above, the configuration of the present disclosure has been described based on the embodiment. However, the present disclosure is not limited to the above embodiment. Also, the materials, numerical values, etc. described in the above embodiment are examples of suitable ones and are not limited thereto. Hereinafter, modifications of the lighting fixture 1 according to the embodiment will be described. However, the basic configuration of the lighting fixture 1 in the modification described below is common to the basic configuration of the lighting fixture 1 according to the embodiment. Therefore, for the configurations that are common to the basic configuration of the lighting fixture 1 according to the embodiment and the configurations that are substantially common, the same reference numerals are given and the illustration and description are appropriately omitted. Note that in the following description, the "substantially common configuration" means a configuration in which the shape, size, etc. are somewhat different but the functions are common.

[0079] As shown in FIG. 8, the lighting fixture 1 of the modified example does not have a heat dissipation part provided in the housing body 111. That is, since the amount of heat (heat generation amount) generated by the light source part 120 is small in the lighting fixture 1 of the modified example compared to the lighting fixture 1 according to the embodiment, by thermally connecting the extending part 112 of the main body part 100 and the frame part 300, even if the heat dissipation part is omitted, sufficient heat dissipation performance can be ensured. Note that the lighting fixture 1 of the modified example does not have a scale plate for indicating the rotation angle of the main body part 100 with respect to the arm part 200, but it may have a scale plate.

[0080] Also, in any of the lighting fixtures 1 of the embodiment and the modified example, the extending part 112 does not have to be formed so as to surround the entire circumference of the opening 111a of the housing body 111. Further, in the lighting fixture 1 of the embodiment, a heat dissipation part 113 may be provided on the extending part 112.

[0081] (4) Aspect The lighting fixture (1) according to the first aspect includes a light source part (120) that irradiates light forward and a housing (110) that holds the light source part (120). The light source part (120) has a plurality of light emitting elements (121) and a mounting substrate (122) on which the plurality of light emitting elements (121) are mounted. The housing (110) has a housing body (111), an extending part (112) that extends outward from the periphery of the housing body (111), and a protruding piece (112a) that protrudes from the tip of the extending part (112). The housing (110) is thermally connected to the light source part (120).

[0082] According to the lighting fixture (1) according to the above aspect, by providing the protruding piece (112a) on the housing (110) that is thermally connected to the light source part (120), it is possible to increase the surface area of the housing (110) while suppressing the increase in size and improve the heat dissipation performance.

[0083] In the lighting fixture (1) according to the second aspect, in the first aspect, it is preferable that the protruding piece (112a) is integrally formed with the extending part (112).

[0084] According to the lighting fixture (1) according to the above aspect, it is possible to improve the heat dissipation while suppressing an increase in the number of parts.

[0085] In the lighting fixture (1) according to the third aspect, in the first or second aspect, it is preferable that the protruding piece (112a) protrudes rearward from the tip of the extending portion (112).

[0086] According to the lighting fixture (1) according to the above aspect, since the protruding piece (112a) protrudes in a direction different from the direction (forward) in which the light source unit (120) emits light, there is no possibility that the light from the light source unit (120) is blocked by the protruding piece (112a).

[0087] In the lighting fixture (1) according to the fourth aspect, in the first or second aspect, it is preferable that the protruding piece (112a) is formed in a long plate shape. When the optical axis of the light irradiated from the light source unit (120) is parallel to the horizontal direction, the longitudinal direction of the protruding piece (112a) is preferably parallel to the vertical direction.

[0088] According to the lighting fixture (1) according to the above aspect, during heat dissipation, the outside air that contacts the protruding piece (112a) rises in the vertical direction, making it easier for the warmed air to circulate and enabling efficient heat dissipation.

[0089] The lighting fixture (1) according to the fifth aspect preferably further includes a translucent member (lens unit 140) that has translucency and is disposed in front of the light source unit (120), and a frame unit (300) that holds the translucent member and is attached to the extending portion (112). The extending portion (112) is preferably thermally connected to the frame unit (300).

[0090] According to the lighting fixture (1) according to the above aspect, since the extending portion (112) and the frame unit (300) are thermally connected, the heat generated by the light source unit (120) can be conducted not only to the main body unit (100) but also to the frame unit (300), thereby further improving the heat dissipation.

[0091] In the lighting fixture (1) according to the sixth aspect, in the fifth aspect, it is preferable that the extending portion (112) is in direct contact with at least a part (side surface portion 111b) of the frame portion (300).

[0092] According to the lighting fixture (1) according to the above aspect, the heat generated by the light source portion (120) can be efficiently conducted to the frame portion (300), and further improvement in heat dissipation can be achieved.

[0093] In the lighting fixture (1) according to the seventh aspect, in the sixth aspect, it is preferable to further include a pressing member (mounting screw 114) that presses a part of the frame portion (300) in a direction approaching the extending portion (112).

[0094] According to the lighting fixture (1) according to the above aspect, by increasing the degree of thermal connection between the frame portion (300) and the extending portion (112), further improvement in heat dissipation can be achieved.

[0095] In the lighting fixture (1) according to the eighth aspect, in the seventh aspect, it is preferable that the pressing member has a fastening member (mounting screw 114) that fastens the frame portion (300) and the extending portion (112).

[0096] According to the lighting fixture (1) according to the above aspect, the frame portion (300) and the extending portion (112) can be thermally connected and mechanically connected at the same time.

[0097] In the lighting fixture (1) according to the ninth aspect, in any of the first to eighth aspects, at least one of the plurality of light-emitting elements (121) is preferably mounted on the peripheral portion of the mounting substrate (122). The peripheral portion preferably overlaps the extending portion (112) when viewed from the thickness direction of the mounting substrate (122).

[0098] According to the lighting fixture (1) according to the above aspect, by reducing the distance between the light-emitting element (121) mounted on the peripheral portion and the extending portion (112), the heat generated by the light-emitting element (121) can be efficiently conducted to the extending portion (112), and further improvement in heat dissipation can be achieved.

[0099] In the lighting fixture (1) according to the tenth aspect, in any of the first to ninth aspects, it is preferable that the light source unit (120) further includes a heat sink (123) that is thermally connected to the mounting substrate (122). It is preferable that the heat sink (123) and the extension portion (112) are thermally connected.

[0100] According to the lighting fixture (1) according to the above aspect, the heat from the light source unit (120) can be efficiently conducted to the extension portion (112).

Explanation of Reference Numerals

[0101] 1 Lighting fixture 100 Main body portion 110 Housing 111 Housing main body 111b Side surface portion 112 Extension portion 112a Projection 113 Heat dissipation portion 114 Mounting screw (pressing member; fastening member) 120 Light source unit 121 Light emitting element 122 Mounting substrate 123 Heat sink 140 Lens portion (light transmitting member)

Claims

1. A light source unit that irradiates light forward, A housing that holds the light source unit, Comprising, The light source unit, A plurality of light emitting elements, A mounting substrate on which the plurality of light emitting elements are mounted, Having, The housing, A housing body, An extending portion extending outward from the periphery of the housing body, A protruding piece protruding from the tip of the extending portion, Having, The housing is thermally connected to the light source unit, A lighting fixture.

2. The protruding piece is integrally formed with the extending portion, The lighting fixture according to Claim 1.

3. The protruding piece protrudes rearward from the tip of the extending portion, The lighting fixture according to Claim 1 or 2.

4. The protruding piece is formed in a long plate shape, The longitudinal direction of the protruding piece is parallel to the vertical direction when the optical axis of the light irradiated from the light source unit is parallel to the horizontal direction, The lighting fixture according to Claim 1 or 2.

5. A light transmissive member having light transmissivity and disposed in front of the light source unit, A frame portion that holds the light transmissive member and is attached to the extending portion, Further comprising, The extending portion and the frame portion are thermally connected, The lighting fixture according to Claim 1 or 2.

6. The extending portion is in direct contact with at least a part of the frame portion, The lighting fixture according to Claim 5.

7. Further comprising a pressing member that presses a part of the frame portion in a direction approaching the extending portion, The lighting fixture according to Claim 6.

8. The pressing member has a fastening member that fastens the frame portion and the extending portion, The lighting fixture according to Claim 7.

9. At least one of the plurality of light emitting elements is mounted on the peripheral portion of the mounting substrate, The peripheral portion overlaps the extending portion when viewed from the thickness direction of the mounting substrate, The lighting fixture according to Claim 1 or 2.

10. The light source unit further has a heat sink that is thermally connected to the mounting substrate, The heat sink and the extending portion are thermally connected, The lighting fixture according to Claim 1 or 2.

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