Luminaire

Abstract

To provide a luminaire that can improve safety without increasing the number of components.SOLUTION: A luminaire 1 comprises: a main body part 100 comprising a light source part 120, and a case 110 in which the light source part 120 is housed; an arm part 200 rotatably supporting the main body part 100; a frame part 300 provided separately from the main body part 100 and the arm part 200, and fitting the arm part 200 to the main body part 100; and a screw part 400 rotatably supporting the frame part 300 and the arm part 200. The main body part 100 comprises a fall prevention hole 115 having a larger bore than the outside diameter of the screw part 400 at a position corresponding to the screw part 400. The screw part 400 is inserted into the fall prevention hole 115.SELECTED DRAWING: Figure 5

Description

Technical Field

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

Background Art

[0002] Conventionally, lighting fixtures with adjustable irradiation directions are known. For example, Patent Document 1 discloses a lighting fixture including a plurality of light source units, a protective cover housing the plurality of light source units, a support member for adjusting the irradiation direction of the light source units, and an appliance body.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the lighting fixture disclosed in Patent Document 1, although the protective cover is screwed to the appliance body, in order to make it difficult for the protective cover to fall off from the appliance body and further improve safety, the protective cover and the appliance body are fixed with separate parts (such as wires). For this reason, the number of parts has increased.

[0005] The present disclosure has been made to solve such problems, and an object thereof is to provide a lighting fixture capable of improving safety without increasing the number of parts.

Means for Solving the Problems

[0006] A lighting fixture according to one aspect of the present disclosure includes a main body portion, an arm portion, a frame portion, and a screw portion. The main body portion has a light source portion and a housing in which the light source portion is housed. The arm portion rotatably supports the main body portion. The frame portion is provided separately from the main body portion and the arm portion, and attaches the arm portion to the main body portion. The screw portion rotatably supports the frame portion and the arm portion. The main body portion has a drop prevention hole having a diameter larger than the outer diameter of the screw portion at a position corresponding to the screw portion. The screw portion is inserted into the drop prevention hole.

Effects of the Invention

[0007] According to the lighting fixture according to the above aspect, the safety can be improved without increasing the number of parts.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Modes for Carrying Out the Invention

[0009] 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 uppermost concept of the present disclosure are described as arbitrary components. Note that each of the drawings referred to in the following embodiments is a schematic diagram and not necessarily a precise illustration. That is, the respective ratios of the sizes and thicknesses of the components in the drawings do not necessarily reflect the actual dimensional ratios.

[0010] (1) Description of the embodiment FIG. 1 is a side view of a lighting fixture 1 (hereinafter abbreviated as lighting fixture 1) according to an 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 (projected lighting) in soccer stadiums, various stadiums, 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.

[0011] As shown in FIGS. 1 to 3, the lighting fixture 1 includes a main body portion 100, a frame portion 300, and a sealing member 600 that seals the gap between the main body portion 100 and the frame portion 300. The lighting fixture 1 further includes an arm portion 200 that rotatably supports the main body portion 100, 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 lighting fixture 1 can adjust the irradiation angle of the light source portion 120 provided in the main body portion 100 by the arm portion 200. Hereinafter, each configuration of the lighting fixture 1 will be described in detail. In addition, 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 the X-axis direction, and the direction orthogonal to the Z-axis direction and the X-axis direction is the Y-axis direction. Also, the directions of the arrows in FIGS. 1 to 5 indicate the positive directions of the X-axis, Y-axis, and Z-axis, respectively.

[0012] (1-1) Main body portion FIG. 4 is a cross-sectional view of the lighting fixture 1 in the XZ plane. As shown in FIGS. 3 and 4, the main body portion 100 includes a light source portion 120 that irradiates light forward (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.

[0013] (1-1-1) Housing As shown in FIGS. 3 and 4, the housing 110 includes a housing main body 111, an extension portion 112, and a plurality of heat dissipation portions 113.

[0014] The housing main body 111 is formed in a box shape having a quadrilateral plate-shaped bottom surface portion 111c and four quadrilateral plate-shaped side surface portions 111b that project forward (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. 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 the direction (X-axis direction) orthogonal to the optical axis (Z-axis) of the light source portion 120.

[0015] The bottom surface portion 111c, the four side surface portions 111b of the housing body 111, and the extension portion 112 are preferably integrally formed by drawing a metal plate (for example, a plate made of aluminum or an aluminum alloy) which 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 die in the drawing process) with respect to at least one of the X-axis and the Y-axis.

[0016] The shape of the outer edge of the extension portion 112 is rectangular, for example, square. Also, 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.

[0017] Also, the housing 110 has a pair of protruding pieces 112a and a pair of bent portions 112b (see FIG. 3). The pair of protruding pieces 112a are formed in a rectangular plate shape having a depression in the center in the longitudinal direction. The pair of protruding pieces 112a protrude rearward (in the negative direction of the Z-axis) from both ends in the X-axis direction of the extension portion 112 (see FIGS. 3 and 4).

[0018] The pair of bent portions 112b are formed in a rectangular plate shape that is narrower in width than the protruding pieces 112a. The pair of bent portions 112b protrude rearward from both ends in the Y-axis direction of the extension portion 112. Here, both the pair of protruding pieces 112a and the pair of bent portions 112b are integrally formed with the housing 110 by bending the metal plate of the material when the housing 110 is formed. The housing 110 aims to improve the mechanical strength by the pair of protruding pieces 112a and the pair of bent portions 112b. Also, the housing 110 aims to improve the heat dissipation by increasing the surface area mainly by the pair of protruding pieces 112a.

[0019] The pair of protruding pieces 112a are provided to be parallel to the YZ plane. That is, the protruding pieces 112a extend from both ends of the extension part 112 in the X-axis direction so as to be orthogonal to the axial direction (X-axis direction) of the screw part 400 (see FIG. 4). Each protruding piece 112a has a dropout prevention hole 115.

[0020] The dropout prevention hole 115 is formed in the protruding piece 112a at a position corresponding to the screw part 400 (a position facing in the X-axis direction). The diameter of the dropout prevention hole 115 is formed larger than the outer diameter of the screw part 400. The dropout prevention hole 115 is formed in the range from the position corresponding to the screw part 400 of the protruding piece 112a to the end of the extension part 112 in the X-axis direction. The tip of the screw part 400 is inserted into the dropout prevention hole 115 (see FIG. 4). The dropout prevention hole 115 is a stopper that suppresses the dropout of the main body part 100 from the frame part 300.

[0021] As shown in FIGS. 3 and 4, the plurality of heat dissipation parts 113 are provided to protrude in the negative Z-axis direction from the rear surface of the bottom surface part 111c of the housing 110 main body. These heat dissipation parts 113 are formed, for example, in a quadrilateral flat plate shape by an aluminum alloy. The plurality of heat dissipation parts 113 are attached to the bottom surface part 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 dissipated efficiently. Further, the plurality of heat dissipation parts 113 are provided to be parallel to the Y-axis direction (vertical direction), so that outside air can convect through between the plurality of heat dissipation parts 113 and the heat dissipation effect can be further enhanced.

[0022] Here, the power supply part 130 is attached to the front surface of the bottom surface part 111c. That is, the housing main body 111 houses the power supply part 130 inside thereof.

[0023] (1-1-2) Light source part As shown in FIG. 3, the light source part 120 includes two LED modules, a heat dissipation plate 123 to which the two LED modules are attached, and an insulating sheet 124 disposed between the two LED modules and the heat dissipation plate 123.

[0024] 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.

[0025] 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 may also be a synthetic resin substrate or a ceramic substrate.

[0026] The insulating sheet 124 is formed in a quadrilateral shape from a synthetic resin material having electrical insulation properties.

[0027] The heat sink 123 is formed in a flat quadrilateral shape 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 the 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 via an object having a high thermal conductivity, for example, metal or synthetic resin.

[0028] (1-1-3) 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.

[0029] 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 constituted by a diode bridge and converts an alternating current into a pulsating direct current. The smoothing capacitor is constituted by an electrolytic capacitor and smooths the pulsating direct current to convert it into a direct current. Further, the filter is constituted by 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 100 V or 200 V) supplied from a commercial AC power supply into a direct voltage by the AC / DC converter. Furthermore, 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.

[0030] 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 described later (see FIG. 4). That is, the power supply unit 130 is housed in the housing 110.

[0031] (1-1-4) Lens unit As shown in FIGS. 3 and 4, 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 this embodiment, the lens unit 140 corresponds to a light-transmitting member.

[0032] The lens unit 140 is formed of a synthetic resin material having light-transmitting properties 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 collect 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.

[0033] (1-2) Frame portion FIG. 5 is a cross-sectional view of a main part (a connecting portion between the frame portion 300 and the arm portion 200) of the lighting fixture 1. As shown in FIGS. 3 to 5, the frame portion 300 has a frame main body 310 and a pair of arm receiving portions 320. The frame portion 300 holds the lens unit 140 and is attached to the main body portion 100.

[0034] As shown in FIG. 3, the frame main body 310 has a front wall 310a formed in a quadrilateral frame shape, and a side wall 310b protruding rearward over the entire circumference from the outer peripheral edge of the front wall 310a. In addition, arm receiving portions 320 are provided one by one at the lower portions (the ends in the negative direction of the Y-axis) of both ends of the side wall 310b in the X-axis direction (see FIGS. 3 and 4).

[0035] As shown in FIGS. 3 to 5, each arm receiving portion 320 has a cylindrical mounting portion 321, a screw hole 322 provided at the center of the mounting portion 321, and a support piece 323 for reinforcing the mounting 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. As shown in FIG. 4, the arm receiving portion 320 is provided along the outer surface of the protruding piece 112a of the housing 110.

[0036] 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 a scale of the angle (rotation angle) 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 of the main body portion 100 with respect to the arm piece 220.

[0037] (1 - 3) Arm portion As shown in FIGS. 3 and 4, the arm portion 200 has a fixing plate 210, a pair of arm pieces 220 that rise upward (in the positive Y-axis direction) from both the left and right ends (both ends in the X-axis direction) of the fixing plate 210, mounting portions 230 provided at the respective tips of the pair of arm pieces 220, and an indicating portion 240 provided on one of the arm pieces 220. The fixing plate 210, the arm pieces 220, the mounting portions 230, and the indicating portion 240 are integrally formed of a metal plate.

[0038] As shown in FIG. 3, the fixing plate 210 has a fixing hole 211 and a second long hole 212. The fixing hole 211 is a circular hole penetrating through the approximate center of the fixing plate 210. The second long hole 212 is a long hole penetrating in a semi-circular arc shape centered on the fixing hole 211 in the negative Z-axis direction with respect to the fixing hole 211 in the fixing plate 210. The fixing plate 210 is fixed to an illumination stand or the like using bolts inserted through the fixing hole 211 and bolts inserted through the second long hole 212. Further, the fixing plate 210 is rotatable about the bolt inserted through the fixing hole 211 with the nuts tightened to each bolt loosened. That is, by rotating the fixing plate 210, the direction of the light emitted from the light source unit 120 can be changed in the horizontal direction (around the Y-axis).

[0039] As shown in FIG. 3, the attachment portions 230 are each formed in a semi-circular shape and are 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 the attachment portions 230.

[0040] 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 with the surface (the surface marked with graduations) 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 with the upper edge of the indicating portion 240.

[0041] The arm portion 200 is rotatably attached to the frame portion 300 by screwing a screw portion 400 inserted through the third through hole 231 via a spacer into the screw holes 322 of the attachment portions 321. Here, the arm portion 200 is thermally connected to the frame portion 300 via the screw portion 400. Thereby, since the heat generated by the light source unit 120 is also conducted from the frame portion 300 to the arm portion 200, the heat dissipation can be improved.

[0042] The screw portion 400 is inserted into the third through hole 231 and then inserted into the second through hole 331 of the arm receiving portion 320. The main body portion 100 is supported rotatably about the screw portion 400 screwed into the third through hole 231 as a rotation axis.

[0043] (1-4) 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.

[0044] 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).

[0045] 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).

[0046] 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, so that the fixing fitting 511 moves in a direction approaching the indicating portion 240, and the scale plate 330 is sandwiched 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. Note that when the handle 510 rotates counterclockwise, the angle fixing portion 500 moves in a direction away from the indicating portion 240, so that the scale plate 330 (main body portion 100) can rotate with respect to the arm portion 200.

[0047] (1-5) Sealing member The sealing member 600 is formed of silicone rubber in a quadrilateral frame shape as viewed from the Z direction. However, the sealing member 600 may be formed of an elastic material other than silicone rubber.

[0048] 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.

[0049] The sealing member 600 is attached to the lens portion 140 so as to surround the periphery of the lens portion 140 with the edge portion 143 inserted into the groove 601 (see FIG. 5).

[0050] (1-6) Connection relationship among the lens portion, the sealing member, and the main body portion As shown in FIG. 5, when the edge portion 143 is inserted into the groove 601, the sealing member 600 is attached to 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).

[0051] The lens unit 140 with the sealing member 600 attached is disposed on the front surface of the extension portion 112 so as to cover the front surface of the light source unit 120. Then, the frame portion 300 covers the lens unit 140 by accommodating 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 at the peripheral portion of the extension portion 112 of the housing 110 (see FIG. 3). Then, from the rear of the extension 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 extension portion 112 (see FIGS. 4 and 5).

[0052] 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 unit 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.

[0053] Thus, since the lighting fixture 1 seals the gap between the lens unit 140 and the extension portion 112 with the sealing member 600, the possibility that the two LED modules of the light source unit 120, which is the charging unit, and the power supply unit 130 come into contact with rainwater can be reduced.

[0054] (1-7) Connection relationship between the frame portion 300 and the arm portion 200 As shown in FIGS. 3 to 5, the frame portion 300 and the arm portion 200 are provided in order from the outside with the arm piece 220 of the arm portion 200, the scale plate 330 (only one side) of the arm portion 200, and the arm receiving portion 320 of the frame portion 300. That is, the third through hole 221 of the arm piece 220, the second through hole 331 of the scale plate 330, and the screw hole 322 of the arm receiving portion 320 are provided so as to be connected in the X-axis direction. And the screw portion 400 is inserted into each hole (the third through hole 221, the second through hole 331, and the screw hole 322). Thereby, the screw portion 400 can rotatably support the frame portion 300 and the arm portion 200. Furthermore, the tip of the screw portion 400 is inserted into the drop prevention hole 115 of the protruding piece 112a. Thereby, even if a separate fall prevention mechanism (for example, a wire or the like) of the main body portion 100 is not provided, the fall of the main body portion 100 can be suppressed, leading to a reduction in the number of parts.

[0055] (1-8) Connection relationship between the light source unit and the main body unit As shown in FIG. 5, the light source unit 120 is attached to the main body unit 100 by screwing a heat dissipation plate 123 to the extension portion 112 of the main body unit 100. That is, a plurality of screw insertion holes 123a are provided in the peripheral portion of the heat dissipation plate 123, and a plurality of fixing screws 123b, each inserted into one of these plurality of screw insertion holes 123a, are screwed into a plurality of screw holes 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 dissipation 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 through the extension portion 112. As a result, the lighting fixture 1 can improve heat dissipation.

[0056] 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.

[0057] (2) Effects of the Embodiment Next, the effects of the lighting fixture 1 configured as described above will be described.

[0058] As described above, the lighting fixture 1 includes a main body portion 100, an arm portion 200, a frame portion 300, and a screw portion 400. The main body portion 100 has a light source portion 120 and a housing 110 that houses the light source portion 120. The arm portion 200 rotatably supports the main body portion 100. The frame portion 300 is provided separately from the main body portion 100 and the arm portion 200, and attaches the arm portion 200 to the main body portion 100. The screw portion 400 rotatably supports the frame portion 300 and the arm portion 200. The main body portion 100 has a drop prevention hole 115 having a diameter larger than that of the screw portion 400 at a position corresponding to the screw portion 400. The screw portion 400 is inserted into the drop prevention hole 115.

[0059] According to this, the screw part 400 provided to rotatably support the frame part 300 and the arm part 200 is connected to the frame part 300 and the arm part 200 through the screw part 400 and the anti - dropping hole 115 by inserting the anti - dropping hole 115 of the main body part 100. When the screw 114 connecting the main body part 100 and the frame part 300 comes off and the main body part 100 tries to drop off from the frame part 300, the edge part of the anti - dropping hole 115 is caught by the screw part 400, serving as a stopper against the dropping of the main body part 100, thus suppressing the dropping of the main body part 100 from the frame part 300. Therefore, the lighting fixture 1 does not need to separately provide an anti - dropping mechanism for the main body part 100, and can improve safety without increasing the number of parts.

[0060] Also, in the lighting fixture 1, the housing 110 has a protruding piece provided at a position corresponding to the screw part 400. The anti - dropping hole 115 is provided in the protruding piece 112a.

[0061] According to this, by providing the anti - dropping hole 115 in the protruding piece 112a, compared with the case of providing the anti - dropping hole 115 in the housing 110, the sealed state of the housing 110 can be maintained, so the waterproof effect can be enhanced.

[0062] Also, in the lighting fixture 1, the housing 110 has an extension part 112. The protruding piece 112a extends from the extension part 112 so as to be orthogonal to the screw part 400.

[0063] According to this, by providing the anti - dropping hole 115 in the protruding piece 112a, the screw part 400 inserted into the anti - dropping hole 115 can be kept horizontal, so it is not easy to drop and the safety is enhanced.

[0064] Also, the lighting fixture 1 further includes an angle fixing part 500. The angle fixing part 500 fixes the frame part 300 and the arm part 200 at a desired rotation angle.

[0065] According to this, by providing the angle fixing part 500, the frame part 300 and the arm part 200 can be fixed at a desired angle.

[0066] In addition, in the lighting fixture 1, the frame portion 300 holds a lens portion 140 that condenses the light emitted from the light source portion 120.

[0067] According to this, the lens portion 140 can condense the light emitted from the light source portion 120, and is suitably used, for example, as floodlighting.

[0068] Note that even when the lighting fixture 1 does not have the extension portion 112, the main body portion 100 can be prevented from falling off by providing the anti-falling hole 115 in the main body portion 100. Therefore, the lighting fixture 1 may not be provided with the extension portion 112.

[0069] Also, even when the lighting fixture 1 does not have the lens portion 140, the main body portion 100 can be prevented from falling off by providing the anti-falling hole 115 in the main body portion 100. Therefore, the lighting fixture 1 may not be provided with the lens portion 140.

[0070] (3) Modification example of the lighting fixture according to the embodiment As described above, the configuration of the present disclosure has been described based on the embodiment, but 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. Modification examples of the lighting fixture according to the embodiment will be described below. However, the basic configuration of the lighting fixture 1 in the modification example 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. exist.

[0071] As shown in FIG. 6, the lighting fixture 1 of the modified example does not have a heat radiating portion provided in the housing main body 111. That is, since the magnitude (heat generation amount) of the heat generated by the light source unit 120 of the lighting fixture 1 of the modified example is smaller than that of the lighting fixture 1 according to the embodiment, by thermally connecting the extending portion 112 of the main body portion 100 and the frame portion 300, sufficient heat dissipation can be ensured even if the heat radiating portion is omitted. 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 portion 100 with respect to the arm portion 200, but it may have a scale plate.

[0072] Also, in any of the lighting fixtures 1 of the embodiment and the modified example, the extending portion 112 does not have to be formed so as to surround the entire circumference of the opening 111a of the housing main body 111. Further, in the lighting fixture 1 of the embodiment, a heat radiating portion 113 may be provided on the extending portion 112.

[0073] Also, in the embodiment, the protruding piece 112a extends in the negative direction of the Z axis, but it may extend in the positive direction of the Z axis.

[0074] (Aspect) The lighting fixture (1) according to the first aspect includes a main body portion (100), an arm portion (200), a frame portion (300), and a screw portion (400). The main body portion (100) has a light source unit (120) and a housing (110) in which the light source unit (120) is housed. The arm portion (200) rotatably supports the main body portion (100). The frame portion (300) is provided separately from the main body portion (100) and the arm portion (200), and attaches the arm portion (200) to the main body portion (100). The screw portion (400) rotatably supports the frame portion (300) and the arm portion (200). The main body portion (100) has a drop prevention hole (115) having a diameter larger than that of the screw portion (400) at a position corresponding to the screw portion (400). The screw portion (400) is inserted into the drop prevention hole (115).

[0075] According to the lighting fixture (1) according to the above aspect, since the anti-drop hole (115) of the main body portion (100) is inserted into the screw portion (400) provided for rotatably supporting the frame portion (300) and the arm portion (200), the main body portion (100) is prevented from dropping. Therefore, it is not necessary to separately provide an anti-drop mechanism, and the safety can be improved without increasing the number of parts.

[0076] In the lighting fixture (1) according to the second aspect, in the first aspect, the housing (110) has a protruding piece provided at a position corresponding to the screw portion (400). The anti-drop hole (115) is provided in the protruding piece (112a).

[0077] According to the lighting fixture (1) according to the above aspect, by providing the anti-drop hole (115) in the extending portion (112), the sealed state of the housing (110) can be maintained, so that the waterproof effect can be enhanced.

[0078] In the lighting fixture (1) according to the third aspect, in the second aspect, the housing (110) has an extending portion (112). The protruding piece (112a) extends from the extending portion (112) so as to be orthogonal to the screw portion (400).

[0079] According to the lighting fixture (1) according to the above aspect, by providing the anti-drop hole (115) in the protruding piece (112a), the screw portion (400) inserted into the anti-drop hole (115) is kept horizontal, so that it is difficult to drop and the safety is enhanced.

[0080] The lighting fixture (1) according to the fourth aspect further includes an angle fixing portion (500) in the first aspect or the second aspect. The angle fixing portion (500) fixes the frame portion (300) and the arm portion (200) at a desired rotation angle.

[0081] According to the lighting fixture (1) according to the above aspect, by providing the angle fixing portion (500), the frame portion (300) and the arm portion (200) can be fixed at a desired angle.

[0082] The lighting fixture (1) according to the fifth aspect, in the first aspect or the second aspect, the frame part (300) holds a lens part (140) that condenses the light emitted from the light source part (120).

[0083] According to the lighting fixture (1) according to the above aspect, the lens part (140) can condense the light emitted from the light source part (120), and is suitably used, for example, as floodlighting.

Explanation of Signs

[0084] 1 Lighting fixture 100 Main body part 110 Housing 112 Extension part 112a Projection 115 Anti-drop hole 120 Light source part 140 Lens part 200 Arm part 300 Frame part 400 Screw part 500 Angle fixing part

Claims

1. A main body portion having a light source portion and a housing that houses the light source portion; An arm portion that rotatably supports the main body portion; A frame portion provided separately from the main body portion and the arm portion, and attaching the arm portion to the main body portion; A screw portion that rotatably supports the frame portion and the arm portion, and comprising; The main body portion has a drop prevention hole having a diameter larger than the outer diameter of the screw portion at a position corresponding to the screw portion; The screw portion is inserted into the drop prevention hole; A lighting fixture.

2. The housing has a protruding piece provided at a position corresponding to the screw portion; The drop prevention hole is provided in the protruding piece; The lighting fixture according to Claim 1.

3. The housing has an extension portion; The protruding piece extends from the extension portion so as to be orthogonal to the axial direction of the screw portion; The lighting fixture according to Claim 2.

4. Further comprising an angle fixing portion; The angle fixing portion fixes the frame portion and the arm portion at a desired rotation angle; The lighting fixture according to Claim 1 or 2.

5. The frame portion holds a lens portion that condenses light emitted from the light source portion; The lighting fixture according to Claim 1 or 2.

Images