Luminaire

Abstract

To reduce size and improve design.SOLUTION: A luminaire A1 comprises an appliance body 1, an LED 20, a power supply device 4, and an arm 5. The appliance body 1 has a cylindrical shape of which at least a front end is opened. The LED 20 is housed in the appliance body 1, and emits light from the front end. The power supply device 4 lights the LED 20. The arm 5 rotatably supports the appliance body 1. The arm 5 protrudes to the outside of the appliance body 1 from the inside of the appliance body 1. The power supply device 4 is arranged on the outside of a space (first concave part 611) in which the arm 5 can rotate, on the inside of the appliance body 1.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to lighting fixtures, and more particularly to lighting fixtures that are capable of changing the direction of illumination. [Background technology]

[0002] The lighting fixture described in Patent Document 1 is taken as an example of a conventional lighting fixture. The lighting fixture described in Patent Document 1 (hereinafter referred to as the conventional example) comprises a lamp, an arm rotatably attached to the lamp, and a plug rotatably attached to the arm. The lamp comprises a lamp body formed in a cylindrical shape with a bottom, a light source module attached to the lamp body, a power supply unit attached to the lamp body and supplying power to the light source module, and a lamp cover attached to the lamp body so as to cover the power supply unit. The lamp body also has an arm attachment portion to which the arm is rotatably attached. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-055855 Summary of the Invention [Problem to be solved by the invention]

[0004] If the arm attachment portion is exposed to the exterior of the lamp body as in the above-mentioned conventional example, there is a concern that the design may be impaired.

[0005] An object of the present disclosure is to provide a lighting fixture that can be made smaller and has improved design. [Means for solving the problem]

[0006] A lighting fixture according to one aspect of the present disclosure includes a cylindrical fixture body having at least an open front end, a light source housed in the fixture body and emitting light from the front end, a power supply device for turning on the light source, and an arm rotatably supporting the fixture body. The arm protrudes from inside the fixture body to outside the fixture body. The power supply device is disposed inside the fixture body outside the rotatable space of the arm. [Effects of the Invention]

[0007] The lighting fixture of the present disclosure has the effect of being miniaturized and improving the design. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a lighting fixture according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is a perspective view of the lighting fixture. [Figure 3] FIG. 3 is a cross-sectional view of the lighting fixture. [Figure 4] FIG. 4 is an exploded perspective view of an end cover and an arm in the lighting fixture. [Figure 5] FIG. 5 is an exploded perspective view of the AC / DC conversion block in the lighting fixture. [Figure 6] FIG. 6 is an exploded perspective view of a DC conversion block in the lighting fixture. [Figure 7] FIG. 7 is a perspective view of an end cover and an arm in the lighting fixture. [Figure 8] FIG. 8 is a perspective view of a part of the lighting fixture, with the second main body portion cut away. [Figure 9] FIG. 9 is a side view of the lighting fixture. [Figure 10] FIG. 10 is a side view of a main part of a power supply device in a lighting fixture according to the first modification. [Figure 11] FIG. 11 is a perspective view of a lighting fixture according to the second modification. [Figure 12]FIG. 12 is a cross-sectional view of the lighting fixture of the second modification, with some parts omitted. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, lighting devices according to embodiments of the present disclosure will be described in detail with reference to the drawings. However, the drawings described in the following embodiments are schematic diagrams, and the ratios of the sizes and thicknesses of the components do not necessarily reflect the actual dimensional ratios. Note that the configurations described in the following embodiments are merely examples of the present disclosure. The present disclosure is not limited to the following embodiments, and various modifications are possible depending on the design, etc., as long as the effects of the present disclosure can be achieved.

[0010] (1) Overview The lighting fixture A1 according to this embodiment includes a fixture body 1, a light source (LED 20), a power supply unit 4, and an arm 5 (see FIGS. 1 to 3). The fixture body 1 is formed in a cylindrical shape with at least the front end open. The light source (LED 20) is housed in the fixture body 1 and emits light from the front end. The power supply unit 4 turns on the light source (LED 20). The arm 5 supports the fixture body 1 so that it can rotate.

[0011] Furthermore, the arm 5 protrudes from inside the instrument body 1 to the outside of the instrument body 1 (see FIG. 1). The power supply device 4 is disposed inside the instrument body 1 outside the rotatable space of the arm 5 (first recess 611) (see FIG. 3).

[0012] Therefore, in the lighting fixture A1 according to the embodiment, the end of the arm 5 supporting the fixture body 1 is housed inside the fixture body 1, and therefore, unlike the conventional example, the arm attachment portion is not exposed to the outside of the lighting fixture body. As a result, the lighting fixture A1 according to the embodiment can be made smaller by disposing the power supply unit 4 inside the fixture body 1, while also achieving improved design compared to the conventional example.

[0013] (2) Details A lighting fixture A1 according to an embodiment (hereinafter simply referred to as lighting fixture A1) is a so-called spotlight that is detachably attached to a lighting wiring duct (also referred to as a lighting duct) (see FIG. 1 ). However, lighting fixture A1 is not limited to a spotlight that is detachably attached to a lighting wiring duct. In the following description, the front-rear, left-right, and up-down directions of lighting fixture A1 are defined in a state in which the axial direction (longitudinal direction) of fixture body 1 and the longitudinal direction of arm 5 are perpendicular to each other, as shown in FIG. 1 . That is, the longitudinal direction of arm 5 is defined as the up-down direction, the axial direction of fixture body 1 (the direction perpendicular to the longitudinal direction of arm 5) is defined as the front-rear direction, and the direction perpendicular to the up-down direction and the front-rear direction is defined as the left-right direction (see arrows in FIG. 1 ).

[0014] The lighting fixture A1 includes a lighting fixture B1, an arm 5, and a plug unit 8 (see FIG. 1). The plug unit 8 is mechanically, electrically, and detachably attached to a lighting wiring duct installed on a ceiling or the like. The arm 5 is rotatably attached to the bottom of the plug unit 8. The rotation axis of the arm 5 is parallel to the vertical direction. The lighting fixture B1 is supported by the arm 5 so that it can rotate within a plane including the vertical and front-to-rear directions. However, the range in which the lighting fixture B1 can rotate is approximately 90 degrees from a position where the axial direction of the fixture body 1 is perpendicular to the longitudinal direction (vertical direction) of the arm 5 (see FIGS. 1 and 3) to a position where the axial direction of the fixture body 1 is parallel to the longitudinal direction (vertical direction) of the arm 5 (see FIG. 8). The lighting fixture B1, the arm 5, and the plug unit 8 will be described in detail below.

[0015] (2-1) Plug unit The plug unit 8 includes a box 80 and a power receiving block 81 (see FIGS. 1 to 3).

[0016] The box 80 is a box-shaped synthetic resin molded body. A circular mounting hole penetrates the bottom wall of the box 80. As will be described later, the first shaft 51 of the arm 5 is inserted into the mounting hole. Then, the first shaft 51 enters the box 80 through the mounting hole and is attached to the box 80 by a bearing so as to be rotatable about the first shaft 51.

[0017] The power receiving block 81 includes a pair of terminal plates 810, a pair of locking pieces 811, a lever 812, and the like (see FIG. 1).

[0018] Lever 812 is attached to box 80 so as to be rotatable relative to the upper surface of box 80. A pair of terminal plates 810 protrude in opposite directions across the rotation axis of lever 812 (see FIG. 1). In addition, a pair of locking pieces 811 protrude below and parallel to the pair of terminal plates 810. The pair of terminal plates 810 and the pair of locking pieces 811 can each rotate integrally with lever 812.

[0019] Furthermore, the pair of terminal boards 810 are electrically connected one-to-one to two electric wires, which are drawn into the fixture body 1 through the internal space 53 of the arm 5 as will be described later.

[0020] Thus, the plug unit 8 electrically connects the pair of terminal plates 810 one-to-one to the pair of power supply electrodes of the lighting wiring duct by rotating the pair of terminal plates 810 and the pair of locking pieces 811 inserted from the opening of the lighting wiring duct by operating the lever 812. Also, the plug unit 8 is mechanically connected to the lighting wiring duct by locking the pair of locking pieces 811 with locked portions inside the lighting wiring duct.

[0021] (2-2) Arm The arm 5 has an arm main body 50, a first shaft portion 51, a pair of second shaft portions 52, and a flange 54 (see FIGS. 3 and 4). The arm main body 50, the first shaft portion 51, the pair of second shaft portions 52, and the flange 54 are integrally formed by, for example, aluminum alloy die-casting. However, the arm 5 is not limited to being made of aluminum alloy die-casting, and may be made of other metals, synthetic resins, or the like.

[0022] The arm body 50 is formed in the shape of a rectangular tube having an internal cavity (internal space 53) (see FIG. 3). The arm body 50 has a rectangular front wall 500 and a rear wall 501, and a pair of side walls 502. The lower end of the rear wall 501 is located higher than the lower end of the front wall 500. The lower ends of the pair of side walls 502 are inclined from the lower end of the front wall 500 toward the lower end of the rear wall 501. The lower end of the arm body 50 is open.

[0023] A disk-shaped flange 54 is integrally formed on the upper end of the arm main body 50. A first shaft portion 51 protrudes upward from the center of the upper surface of the flange 54. An internal space 53 of the arm main body 50 is open to the upper surface of the first shaft portion 51 through the inside of the flange 54 and the first shaft portion 51 (see FIGS. 3 and 4).

[0024] The first shaft portion 51 is formed in a cylindrical shape. As described above, the first shaft portion 51 is rotatably attached to the box 80 of the plug unit 8.

[0025] The pair of second shaft portions 52 are each formed in a cylindrical shape and protrude outward (to the left and right) from the lower portions of the pair of side walls 502, one each (see FIG. 4).

[0026] (2-3) Lighting equipment The lighting fixture B1 includes a fixture body 1, a light source unit 2, a lens unit 3, a power supply unit 4, an end cover 6, and the like (see FIGS. 1 to 3).

[0027] (2-3-1) Device body The appliance body 1 has a first body portion 11 and a second body portion 12. The first body portion 11 and the second body portion 12 are each formed by aluminum alloy die-casting into a cylindrical shape with both ends open. The first body portion 11 and the second body portion 12 have the same diameter but different axial lengths. The second body portion 12 is formed to have a longer axial length than the first body portion 11. However, the first body portion 11 and the second body portion 12 are not limited to being aluminum alloy die-casting, and may be formed from other metals, synthetic resins, or the like.

[0028] An annular rib 110 is formed at the rear end of the inner circumferential surface of the first main body portion 11 (see FIG. 3). The rib 110 has one screw insertion hole at each of the left and right ends.

[0029] A rectangular slit 120 is formed in the second main body portion 12 from the rear end to the center in the axial direction. The width (left-right distance) of the slit 120 is wider than the width (distance between the pair of side walls 502) of the arm main body 50 (see FIG. 1).

[0030] (2-3-2) Light source unit The light source unit 2 includes an LED 20 as a light source, a holder 21, a pair of connectors 22, a heat conduction sheet 23, and a unit body 24 (see FIGS. 2 and 3).

[0031] The LED 20 is a COB (Chip on Board) type white LED for illumination. However, the light source is not limited to an LED, and may be an organic electroluminescence element, a semiconductor laser element, or the like.

[0032] The unit body 24 is formed into a disk shape by die-casting an aluminum alloy, but the material of the unit body 24 is not limited to die-casting an aluminum alloy, and it may be formed from other metals or synthetic resins.

[0033] A rectangular recess 240 is provided in the center of the front surface of the unit body 24 (see FIG. 3). A rectangular heat conduction sheet 23 is housed in this recess 240. In addition, a screw insertion hole 241 and a screw hole 242 are provided on each of the left and right ends of the unit body 24 (see FIG. 2).

[0034] A holder 21 for holding the LED 20 is attached to the front of the unit body 24. The holder 21 is made of synthetic resin and is formed in the shape of a frame with a square window in the center. The holder 21 holds the LED 20 by fitting it into the window. However, the holder 21 may be made of a material other than synthetic resin, such as metal or ceramic. The LED 20 held by the holder 21 and attached to the unit body 24 is thermally connected to the unit body 24 via the thermal conduction sheet 23 by being in close contact with the thermal conduction sheet 23 (see FIG. 3).

[0035] (2-3-3) Lens unit The lens unit 3 includes a lens 30, a lens holder 31, a cover 32, a rotor 33, a first spring member 34, a second spring member 35, and the like (see FIG. 3).

[0036] The lens 30 is a Fresnel lens made of a light-transmitting synthetic resin such as silicone resin, acrylic resin, polycarbonate resin, etc. However, the lens 30 may be made of a material other than synthetic resin, such as inorganic glass.

[0037] The lens holder 31 is made of synthetic resin and has a circular ring shape. The lens holder 31 surrounds the periphery of the lens 30 to hold the lens 30 (see FIG. 3). The lens holder 31 also has a pair of protrusions 310 that protrude radially from the circumferential surface, and three legs 311 that protrude rearward so that their longitudinal direction coincides with the front-rear direction.

[0038] The cover 32 is formed in a disk shape from a translucent synthetic resin such as an acrylic resin. The cover 32 is attached to the cylindrical portion 330 of the rotor 33 using a second spring member 35, as will be described later. The cover 32 covers the front surface of the rotor 33 to prevent insects from entering the rotor 33 (see FIG. 1).

[0039] The rotor 33 has a cylindrical portion 330 and an annular operating portion 331 provided at the front end of the cylindrical portion 330 (see FIGS. 1 to 3). The cylindrical portion 330 has two inclined grooves 332, a plurality of first through holes, and a plurality of second through holes (see FIG. 3). The two inclined grooves 332 penetrate the cylindrical portion 330 so as to be inclined along the circumferential surface of the cylindrical portion 330 from the front end to the rear end of the cylindrical portion 330. The two inclined grooves 332 are formed in positions and shapes that are rotationally symmetrical by 180 degrees.

[0040] The lens 30 and the lens holder 31 are housed inside the cylindrical portion 330. The lens holder 31 is rotatably housed inside the cylindrical portion 330 such that the pair of protrusions 310 are inserted into the two inclined grooves 332 of the cylindrical portion 330.

[0041] The plurality of first through holes and the plurality of second through holes are both provided at positions closer to the front end of the cylindrical portion 330. However, the plurality of second through holes are provided at positions closer to the front end of the cylindrical portion 330 than the plurality of first through holes.

[0042] The first spring member 34 and the second spring member 35 are both formed by bending spring wire into a C-shape. Furthermore, the first spring member 34 and the second spring member 35 each have a plurality of protrusions.

[0043] The first spring member 34 is disposed in the cylindrical portion 330 in a reduced diameter state, and the plurality of protruding pieces protrude out of the cylindrical portion 330 one by one through a plurality of first through holes provided in the cylindrical portion 330.

[0044] The second spring member 35 is arranged in a reduced diameter state in front of the cover 32 inside the cylindrical portion 330. Here, the multiple protrusions of the second spring member 35 are engaged with the multiple second through-holes provided in the cylindrical portion 330. Therefore, the cover 32 is attached to the cylindrical portion 330 such that the peripheral edge portion is sandwiched between the second spring member 35 and a flange 333 protruding from the inner peripheral surface of the cylindrical portion 330 (see FIG. 3).

[0045] The lens unit 3 is housed in the first body portion 11 of the instrument body 1 as described below (see FIG. 3). Here, the rotation of the three legs 311 of the lens holder 31 around the central axis of the first body portion 11 is restricted by three stoppers provided in the first body portion 11. However, the lens holder 31 can move in the front-to-rear direction (the axial direction of the first body portion 11) with the rotation of the three legs 311 restricted by the three stoppers.

[0046] Thus, when the operating portion 331 is operated to rotate the rotor 33, the pair of protrusions 310 move relatively within the two inclined grooves 332 of the cylindrical portion 330. However, because the rotation of the lens holder 31 is restricted, the lens 30 and lens holder 31 move back and forth without rotating. In other words, by operating the operating portion 331, the lens unit 3 can adjust the irradiation range of the light emitted from the LED 20 and focused by the lens 30 by changing the relative distance between the LED 20 and the lens 30.

[0047] (2-3-4) Power supply device The power supply device 4 has an AC / DC conversion block 4A and a DC conversion block 4B (see FIGS. 2 and 3).

[0048] The AC / DC conversion block 4A has an AC / DC conversion circuit that converts AC voltage (AC power) supplied from the power system via the lighting wiring duct and plug unit 8 into DC voltage (DC power). The AC / DC conversion circuit is composed of a first printed circuit board 41, which is a double-sided printed wiring board on which multiple circuit components are mounted. The AC / DC conversion block 4A also has a first heat sink 43 to which the first printed circuit board 41 is attached, and a first heat conduction member 45 interposed between the first printed circuit board 41 and the first heat sink 43 (see FIGS. 3 and 5).

[0049] The first heat dissipation plate 43 is formed into a flat plate shape using a metal plate (e.g., an aluminum plate) that is a good conductor of heat. The first heat conduction member 45 is formed, for example, from a silicone rubber sheet material that has excellent thermal conductivity and electrical insulation properties. Three female thread portions 430 are provided on the first heat dissipation plate 43 (see FIG. 5). The AC / DC conversion block 4A is assembled by placing the first heat conduction member 45 on the surface of the first heat dissipation plate 43, and then placing the first printed circuit board 41 on the surface of the first heat conduction member 45, and screwing three mounting screws 47 into the three female thread portions 430 one by one.

[0050] The DC conversion block 4B has a DC conversion circuit that converts (steps down) the DC voltage output from the AC / DC conversion block 4A into a DC voltage suitable for the LEDs 20. The DC conversion circuit is composed of a second printed circuit board 42, which is a double-sided printed wiring board on which multiple circuit components are mounted. However, the DC conversion circuit may also be configured to boost the input voltage. The DC conversion block 4B also has a second heat sink 44 to which the second printed circuit board 42 is attached, and a second heat conduction member 46 interposed between the second printed circuit board 42 and the second heat sink 44 (see FIGS. 3 and 6).

[0051] The second heat dissipation plate 44 is formed into a rectangular shape from a metal plate (for example, an aluminum plate) that is a good conductor of heat. A pair of cut-and-raised portions 440 is provided at one longitudinal end of the second heat dissipation plate 44 (see FIG. 6). A protruding piece 441 is provided between the pair of cut-and-raised portions 440. A female screw portion 442 is provided at each of the corners of the second heat dissipation plate 44 and the protruding piece 441.

[0052] The second heat conduction member 46 is formed of, for example, a silicone rubber sheet material that has excellent thermal conductivity and electrical insulation. The DC conversion block 4B is assembled by placing the second heat conduction member 46 on the surface of the second heat sink 44, and then placing the second printed circuit board 42 on the surface of the second heat conduction member 46, and screwing two mounting screws 48 into the two female threads 442, one for each.

[0053] (2-3-5) End cover The end cover 6 has a cover plate 60, an attachment portion 61, an attachment spring 62, a plurality of attachment screws 63, a first boss portion 64, and a second boss portion 65 (see FIGS. 2 to 4 and 7). The cover plate 60, attachment portion 61, first boss portion 64, and second boss portion 65 are integrally formed by aluminum alloy die-casting. However, the cover plate 60, attachment portion 61, first boss portion 64, and second boss portion 65 may be formed from a metal other than aluminum alloy die-casting or from a synthetic resin.

[0054] The cover plate 60 is formed in a disk shape, but the cover plate 60 has a U-shaped groove 600 formed in it that extends radially from the center.

[0055] The mounting portion 61 is formed integrally with the cover plate 60 so as to protrude forward from the front surface of the cover plate 60. The mounting portion 61 has a roughly semi-cylindrical base portion 610. A first recess 611 with an open top surface is formed in the base portion 610 (see FIGS. 3 and 4). Two screw holes 6100 are provided on the front surface of the base portion 610, spaced apart in the left-right direction (see FIG. 7). Furthermore, recesses 6101 are provided at both ends of the base portion 610 in the left-right direction. A screw hole 6102 is provided in the bottom surface of each recess 6101 (see FIG. 7).

[0056] The bottom surface of the first recess 611 is inclined upward from the cover plate 60 toward the front. A pair of bearing portions 613 is provided on the bottom surface of the first recess 611. Each of the pair of bearing portions 613 is formed in an L-shape and is arranged apart in the left-right direction. A second recess 612 is provided between the pair of bearing portions 613 (see FIGS. 3 and 4). A stopper 614 and an electric wire insertion hole 615 are provided on the bottom surface of the second recess 612.

[0057] A screw hole 616 is provided in the bottom surface of the first recess 611 above each of the pair of bearing portions 613 (see FIG. 4). Also, a screw hole 617 is provided in the bottom surface of the first recess 611 below the second recess 612 (see FIGS. 3 and 4).

[0058] The first boss portion 64 is formed in a substantially pyramidal shape. The first boss portion 64 is formed integrally with the cover plate 60 so as to protrude forward from the lower end of the front surface of the cover plate 60 (see FIG. 7). A screw hole 640 is formed in the tip surface (front surface) of the first boss portion 64. The second boss portion 65 is formed in a substantially prismatic shape. The second boss portion 65 is formed integrally with the cover plate 60 so as to protrude forward from both sides of the first boss portion 64 at the lower end of the front surface of the cover plate 60. Two screw holes 650 are formed in the tip surface (front surface) of the second boss portion 65. These two screw holes 650 are provided one on each side of the first boss portion 64 when viewed from the front (see FIG. 7).

[0059] The mounting spring 62 has a pair of pressing pieces 620 and a connecting piece 621 that connects the pair of pressing pieces 620, and is formed in a U-shape from a metal plate (see FIG. 4). A curved portion 622 is provided midway between each of the pair of pressing pieces 620. Each curved portion 622 is formed integrally with the pressing piece 620 by bending the pressing piece 620 into a semicircular arc. A screw insertion hole 623 is provided at the tip of each pressing piece 620. Also, a screw insertion hole 624 is provided at the center of the connecting piece 621.

[0060] (2-3-6) Assembly procedure for the lamp Next, the assembly procedure for the lamp B1 will be described. However, the assembly procedure described below is only an example, and it is possible to rearrange some steps or add other steps.

[0061] First, the worker performing the assembly work attaches the arm 5 to the attachment portion 61 of the end cover 6. The worker screws the attachment screws 63, which have been inserted into the screw insertion holes 624 of the connecting pieces 621 of the attachment spring 62, into the screw holes 617 of the attachment portion 61 (see FIG. 3). Next, the worker places the pair of second shaft portions 52 of the arm 5 one by one on the pair of bearing portions 613 of the attachment portion 61, and then screws the two attachment screws 63, which have been inserted into the respective screw insertion holes 623 of the pair of pressing pieces 620 of the attachment spring 62, into the two screw holes 616 of the attachment portion 61, one by one.

[0062] Therefore, by attaching the mounting spring 62 to the mounting portion 61 with three mounting screws 63, the pair of second shaft portions 52 of the arm main body 50 are rotatably supported by the pair of curved portions 622 and the pair of bearing portions 613 (see Figures 3, 4 and 7).

[0063] Next, the worker attaches the DC conversion block 4B of the power supply unit 4 to the end cover 6. The worker inserts one screw 66 into each of the screw insertion holes provided in the pair of cut-and-raised portions 440 of the second heat sink 44, and then screws the two screws 66 into each of the two screw holes 650 provided in the second boss portion 65 of the end cover 6 (see FIGS. 3, 7, and 8).

[0064] Thus, the DC conversion block 4B is positioned outside the space between the mounting portion 61 and the first boss portion 64 and the second boss portion 65, i.e., the space in which the arm 5 can rotate (the first recess 611 of the mounting portion 61) (see Figures 3 and 8).

[0065] Next, the worker attaches the end cover 6 to the second main body portion 12. The worker inserts the DC conversion block 4B and the attachment portion 61 of the end cover 6 from the opening at the rear end of the second main body portion 12. At this time, the worker inserts the arm 5 attached to the end cover 6 into the slit 120 of the second main body portion 12.

[0066] Here, the second main body portion 12 has three fixing pieces 121 that protrude radially from the inner circumferential surface at approximately the center in the axial direction (front-rear direction). Each of these three fixing pieces 121 is provided with a screw insertion hole 122 (see FIG. 3).

[0067] The worker inserts one screw into each of the screw insertion holes 122 of the three fixing pieces 121 of the second main body portion 12. Then, the worker screws these three screws into the screw holes 640 of the first boss portion 64 and the screw holes 6102 of the pair of recesses 6101 of the mounting portion 61, one by one.

[0068] The end cover 6 is then attached to the second main body portion 12 by screwing it to the three fixing pieces 121 of the second main body portion 12 (see FIG. 8).

[0069] Next, the worker attaches the AC / DC conversion block 4A of the power supply device 4 to the end cover 6. The worker electrically connects the electric wires inserted into the internal space 53 of the arm 5 to the first printed circuit board 41 of the AC / DC conversion block 4A. Furthermore, the worker electrically connects the output terminals of the first printed circuit board 41 and the input terminals of the second printed circuit board 42 via electric wires.

[0070] Then, the worker inserts the AC / DC conversion block 4A into the second main body 12 through the opening at the front end of the second main body 12. The worker inserts the screws 67 one by one into the two screw insertion grooves 431 provided at the end of the first heat sink 43. The worker then screws these two screws 67 one by one into the two screw holes 6100 provided at the front surface of the mounting portion 61 of the end cover 6 (see FIGS. 2, 3, 7, and 8).

[0071] Thus, the first heat sink 43 is screwed to the end cover 6, whereby the AC / DC conversion block 4A is attached to the end cover 6. In other words, the AC / DC conversion block 4A is disposed inside the second main body 12, outside the space in which the arm 5 can rotate (the first recess 611 of the attachment portion 61) (see FIGS. 3 and 8).

[0072] Next, the worker attaches the light source unit 2 to the second body 12. However, before attaching the light source unit 2 to the second body 12, it is desirable that the worker electrically connect the output terminal of the second printed circuit board 42 to the connector 22 of the light source unit 2 via an electric wire. The electric wire connecting the output terminal of the second printed circuit board 42 to the connector 22 of the light source unit 2 is drawn to the front of the light source unit 2 through the space between the second printed circuit board 42 and the second body 12 and through a through-hole 243 (see FIGS. 2 and 3) provided in the unit body 24, and connected to the connector 22. Here, two bosses 123 are provided on the inner circumferential surface of the second body 12. Furthermore, screw holes 1230 are provided at the tip portions of these two bosses 123, respectively (see FIGS. 2, 3, and 8).

[0073] The worker inserts one fixing screw 25 into each of the two screw insertion holes 241 provided in the unit body 24 of the light source unit 2. Then, with the light source unit 2 inserted through the opening at the front end of the second body portion 12, the worker screws one fixing screw 25 into each of the screw holes 1230 in the two boss portions 123 of the second body portion 12 (see FIG. 2).

[0074] The unit body 24 is then screwed onto the two bosses 123 of the second body 12, thereby attaching the light source unit 2 to the second body 12 (see FIG. 3).

[0075] Next, the worker joins the second body portion 12 and the first body portion 11 to assemble the fixture body 1. The worker places the first body portion 11 over the front end of the second body portion 12 and inserts one screw each into two screw insertion holes provided in the rib 110 of the first body portion 11 from the opening at the front end of the first body portion 11. The worker then screws these two screws one by one into two screw holes 242 provided in the unit body 24 of the light source unit 2.

[0076] Thus, the rib 110 of the first body portion 11 is screwed to the unit body 24, so that the first body portion 11 and the second body portion 12 are indirectly joined via the unit body 24 (see FIG. 3).

[0077] Finally, the worker attaches the lens unit 3 to the first main body portion 11.

[0078] First, the worker inserts the rotor 33, to which the lens 30, lens holder 31, cover 32, first spring member 34, and second spring member 35 are attached, into the first body 11 through the opening at the front end of the first body 11. At this time, the multiple protrusions protruding from the multiple first through holes to the outside of the cylindrical portion 330 are pressed against the inner circumferential surface of the first body 11, causing the diameter of the first spring member 34 to decrease. As a result, the multiple protrusions retract into the cylindrical portion 330, allowing the worker to insert the rotor 33 into the first body 11. Then, when the rotor 33 is inserted to a predetermined position, the multiple protrusions protruding from the multiple first through holes of the cylindrical portion 330 engage with engagement grooves 111 (see FIG. 3 ) provided circumferentially on the inner circumferential surface of the first body 11.

[0079] Thus, the lens unit 3 is attached to the first main body portion 11 by engaging the plurality of protrusions with the engaging grooves 111.

[0080] The assembly of the lighting fixture B1 is completed by the above-described procedure. Furthermore, the plug unit 8 is attached to the first shaft portion 51 of the arm 5, thereby completing the assembly of the lighting fixture A1.

[0081] (2-4) How to use lighting equipment Next, a brief description will be given of how to use the lighting fixture A1.

[0082] First, the lighting fixture A1 is attached to the lighting wiring duct. Specifically, the plug unit 8 attached to the tip of the arm 5 is attached to the lighting wiring duct, thereby mechanically and electrically connecting the lighting fixture A1 to the lighting wiring duct.

[0083] Next, the illumination direction of the lighting fixture B1 is adjusted. The arm 5 of the lighting fixture B1 can rotate approximately 360 degrees relative to the plug unit 8 in a plane parallel to the ceiling surface on which the lighting wiring duct is installed. In other words, the illumination direction of the lighting fixture B1 can be adjusted horizontally by rotating together with the arm 5. The illumination direction of the lighting fixture B1 can also be adjusted vertically within a range (approximately 90 degrees) from a position where the axial direction of the fixture body 1 and the longitudinal direction of the arm 5 are approximately perpendicular (see FIG. 1) to a position where the axial direction of the fixture body 1 and the longitudinal direction of the arm 5 are approximately aligned (see FIG. 9). Note that the rotation range of the lighting fixture B1 is limited by the lower end of the arm body 50 hitting a stopper 614 provided on the mounting portion 61 (see FIG. 3). If the vertical angle of the lighting fixture B1 cannot be maintained, the mounting screw 63 can be tightened with a tool (such as a Phillips head screwdriver) through the slit 120 of the second body portion 12 and the groove 600 of the cover plate 60. By tightening the mounting screw 63, the holding force of the mounting spring 62 on the second shaft portion 52 increases, and the vertical angle of the lamp B1 is maintained.

[0084] Finally, the operating portion 331 is operated to rotate the rotor 33, thereby adjusting the light distribution (illumination range) of the lighting fixture B1.

[0085] (3) Advantages of the embodiment As described above, in lighting fixture A1, the end of arm 5 supporting fixture body 1 is housed inside fixture body 1, and power supply unit 4 is disposed outside the space (first recess 611) inside fixture body 1 where arm 5 can rotate. In other words, in lighting fixture A1, mounting portion 61 that attaches arm 5 to fixture body 1 is not exposed to the outside of fixture body 1 (see FIG. 1). Therefore, by disposing power supply unit 4 inside fixture body 1, lighting fixture A1 can be made smaller while also achieving improved design compared to conventional examples.

[0086] Furthermore, lighting fixture A1 has arms 5 protruding from the side surface of fixture body 1 along the axial direction (cylindrical surface of cylindrical fixture body 1) to the outside of fixture body 1 (see FIG. 1). Therefore, lighting fixture A1 can be made smaller in size along the axial direction of fixture body 1 than, for example, a case in which arms 5 protrude from the end surface (bottom surface) of fixture body 1 in the axial direction to the outside of fixture body 1.

[0087] Furthermore, lighting fixture A1 is provided with a mounting portion 61 to which arm 5 is rotatably attached inside fixture body 1. By providing mounting portion 61, lighting fixture A1 can easily support fixture body 1 on arm 5.

[0088] Here, the lighting fixture A1 has a wall disposed inside the fixture body 1 between at least a part of the power supply device 4 (first printed circuit board 41) and the space (first recess 611) (see FIG. 3). In the lighting fixture A1 of the embodiment, the front end portion of the mounting portion 61 provided on the end cover 6 and the first heat sink 43 of the AC / DC conversion block 4A correspond to the wall.

[0089] Therefore, since the lighting fixture A1 has a wall (mounting portion 61; first heat sink 43) positioned between the first printed circuit board 41 and the first recess 611, contact between the arm 5 and the power supply unit 4 (first printed circuit board 41) can be reliably prevented.

[0090] Furthermore, in lighting fixture A1, the first printed circuit board 41 and the second printed circuit board 42 that constitute the power supply device 4 are arranged inside the fixture body 1 so as to surround the first recess 611 (see FIG. 3). In other words, in lighting fixture A1, the power supply device 4 (the first printed circuit board 41 and the second printed circuit board 42) are arranged in dead space inside the fixture body 1, so that the dead space inside the fixture body 1 can be effectively utilized to achieve a compact size.

[0091] Furthermore, in lighting fixture A1, power supply device 4 further includes a first heat sink 43 thermally coupled to first printed circuit board 41 and a second heat sink 44 thermally coupled to second printed circuit board 42, and first heat sink 43 is disposed between first printed circuit board 41 and first recess 611 (see FIG. 3 ). In other words, lighting fixture A1 thermally conducts heat generated on first printed circuit board 41 to first heat sink 43 and dissipates the heat from first heat sink 43, thereby suppressing a temperature rise in power supply device 4.

[0092] Here, lighting fixture A1 includes a first heat conductive member 45 interposed between first printed circuit board 41 and first heat sink 43, and a second heat conductive member 46 interposed between second printed circuit board 42 and second heat sink 44, in power supply device 4. Therefore, lighting fixture A1 can efficiently conduct heat generated on first printed circuit board 41 and second printed circuit board 42 to first heat sink 43 and second heat sink 44 through first heat conductive member 45 and second heat conductive member 46. As a result, lighting fixture A1 can further suppress temperature rise in power supply device 4.

[0093] Furthermore, in the lighting fixture A1, the first printed circuit board 41 faces the first recess 611 along the axial direction (front-rear direction) of the fixture body 1. Furthermore, in the lighting fixture A1, the second printed circuit board 42 faces the first recess 611 along a direction (up-down direction) intersecting the axial direction of the fixture body 1 (see FIG. 3 ). However, in the lighting fixture A1, the second printed circuit board 42 may face the first recess 611 along the axial direction of the fixture body 1, and the first printed circuit board 41 may face the first recess 611 along the up-down direction of the fixture body 1.

[0094] Thus, in the lighting fixture A1, the first printed circuit board 41 and the second printed circuit board 42 face the first recess 611 from different directions. Therefore, the lighting fixture A1 has the advantage that it is easier to reduce the size of the fixture body 1 compared to when the first printed circuit board 41 and the second printed circuit board 42 face the first recess 611 from the same direction.

[0095] Incidentally, lighting fixture A1 has the first printed circuit board 41 and the second printed circuit board 42 that make up the power supply device 4 arranged inside fixture body 1 without being housed in a case. Therefore, lighting fixture A1 has the advantage of being able to provide greater freedom in selecting the placement location inside fixture body 1 and of being able to save space for placement location compared to when the first printed circuit board 41 and the second printed circuit board 42 are housed in a case.

[0096] (4) Variations Next, several modified examples of the lighting device A1 according to the embodiment will be described. However, the basic configuration of the lighting device A1 in each of the modified examples described below is the same as the basic configuration of the lighting device A1 according to the embodiment. Therefore, the same reference numerals will be used to designate components that are common to the basic configuration of the lighting device A1 according to the embodiment, and illustrations and descriptions thereof will be omitted as appropriate. In the following description, "substantially common configuration" means a configuration that is slightly different in shape, size, etc., but has the same function.

[0097] (4-1) Variation 1 Illumination device A1 of modification 1 is characterized in that first printed circuit board 41 and second printed circuit board 42 are formed on a single substrate (printed wiring board) (see FIG. 10).

[0098] For example, first printed circuit board 41 and second printed circuit board 42 in Modification 1 may be formed of flexible printed wiring boards using flexible insulating substrates. Alternatively, first printed circuit board 41 and second printed circuit board 42 in Modification 1 may be formed of flex-rigid printed wiring boards consisting of flexible portions and rigid portions. In either case, first printed circuit board 41 and second printed circuit board 42 are preferably formed in an L-shape when viewed from the side (see FIG. 10).

[0099] Therefore, in the lighting fixture A1 of variant 1, the first printed circuit board 41 and the second printed circuit board 42 are formed on a single substrate (printed wiring board), which improves the workability of the installation work of attaching the power supply unit 4 to the fixture body 1 compared to the lighting fixture A1 of the embodiment.

[0100] (4-2) Variation 2 The lighting fixture A1 of the second modification is characterized by the mounting structure for mounting the arm 5 to the fixture body 1 and the configuration of the power supply device 4 (see FIGS. 11 and 12).

[0101] The arm 5 in the second modification has a cylindrical arm body 50 and a columnar second shaft portion 52 that protrudes forward and to both the left and right from the axial end (lower end) of the arm body 50. The arm 5 is rotatably attached to an attachment portion 61 with the arm body 50 protruding outward from a groove 600 provided in a cover plate 60 of the end cover 6.

[0102] Mounting portion 61 in Modification 2 includes bearing spring 68 attached to cover plate 60 (see FIG. 12). Mounting portion 61 in Modification 2 rotatably supports second shaft portion 52 with bearing spring 68 and mounting spring 62 screwed to cover plate 60. Therefore, in lighting fixture A1 of Modification 2, the rotatable space of arm 5 ranges from the front surface of cover plate 60 to the front end of mounting spring 62.

[0103] The power supply device 4 in the second modification has a first printed circuit board 41, a second printed circuit board 42, a first heat conducting member 45, a second heat conducting member 46, and a heat sink 49 (see FIG. 12).

[0104] The heat sink 49 is formed in a U-shape from a metal plate (e.g., an aluminum plate) that is a good thermal conductor. The heat sink 49 has a rectangular bottom plate 490, a rectangular upper plate 491 that stands up from one end (upper end) of the bottom plate 490, and a rectangular lower plate 492 that stands up from the other end (lower end) of the bottom plate 490. The heat sink 49 is attached to the end cover 6 by screwing the bottom plate 490 to a plurality of bosses 601 that protrude forward from the front surface of the cover plate 60. Here, the bottom plate 490 of the heat sink 49 attached to the end cover 6 is located forward of the front end of the mounting spring 62 in the axial direction of the appliance body 1 (see FIG. 12).

[0105] The first printed circuit board 41 is screwed to the upper surface of the lower plate 492 of the heat sink 49 via the first heat conductive member 45. The second printed circuit board 42 is screwed to the upper surface of the upper plate 491 of the heat sink 49 via the second heat conductive member 46. Therefore, by being attached to the heat sink 49 with screws, the first printed circuit board 41 and the second printed circuit board 42 are positioned inside the fixture body 1 and outside the space in which the arm 5 can rotate (see FIG. 12).

[0106] Thus, in lighting fixture A1 of Modification 2, the end of arm 5 supporting fixture body 1 is housed inside fixture body 1, and power supply unit 4 is disposed outside the space inside fixture body 1 where arm 5 can rotate. In other words, in lighting fixture A1 of Modification 2, mounting portion 61 that mounts arm 5 to fixture body 1 is not exposed to the outside of fixture body 1 (see FIG. 11 ). Therefore, like lighting fixture A1 according to the embodiment, lighting fixture A1 of Modification 2 can be made smaller by disposing power supply unit 4 inside fixture body 1, while also achieving improved design compared to conventional examples.

[0107] Here, lighting fixture A1 of modified example 2 is provided with a bottom plate 490 of heat sink 49 as a wall disposed between power supply unit 4 and the space inside fixture body 1. Since lighting fixture A1 of modified example 2 has a wall (bottom plate 490) disposed between power supply unit 4 and the space, it is possible to reliably prevent contact between arm 5 and power supply unit 4.

[0108] (5) Summary The lighting fixture (A1) according to the first aspect of the present disclosure includes a fixture body (1), a light source (LED 20), a power supply device (4), and an arm (5). The fixture body (1) is cylindrical with at least the front end open. The light source is housed in the fixture body (1) and emits light from the front end. The power supply device (4) turns on the light source. The arm (5) rotatably supports the fixture body (1). The arm (5) protrudes from inside the fixture body (1) to the outside of the fixture body (1). The power supply device (4) is disposed inside the fixture body (1) outside the rotatable space (first recess 611) of the arm (5).

[0109] In the lighting fixture (A1) according to the first aspect, the end of the arm (5) supporting the fixture body (1) is housed inside the fixture body (1), and therefore, unlike conventional examples, the arm attachment portion is not exposed to the outside of the lighting fixture body. As a result, the lighting fixture (A1) according to the first aspect can be made smaller by arranging the power supply device (4) inside the fixture body (1), while achieving improved design compared to conventional examples.

[0110] A lighting fixture (A1) according to a second aspect of the present disclosure can be realized in combination with the first aspect. Preferably, the lighting fixture (A1) according to the second aspect further includes a mounting portion (61) to which the arm (5) is rotatably mounted inside the fixture body (1).

[0111] The lighting fixture (A1) according to the second aspect includes the mounting portion (61), which allows the fixture body (1) to be easily supported on the arm (5).

[0112] A lighting fixture (A1) according to a third aspect of the present disclosure can be realized by combining it with the first or second aspect. The lighting fixture (A1) according to the third aspect preferably further includes a wall (mounting portion 61; bottom plate 490). The wall is preferably disposed between at least a portion of the power supply device (4) and the space inside the fixture body (1).

[0113] The lighting fixture (A1) according to the third aspect can reliably prevent contact between the arm (5) and the power supply device (4).

[0114] A lighting fixture (A1) according to a fourth aspect of the present disclosure can be realized by combining it with any of the first to third aspects. In the lighting fixture (A1) according to the fourth aspect, the power supply device (4) preferably has one or more printed circuit boards (a first printed circuit board 41, a second printed circuit board 42). The printed circuit boards are preferably arranged so as to surround a space inside the fixture body (1).

[0115] In the lighting fixture (A1) according to the fourth aspect, the power supply device (4) is disposed in the dead space inside the fixture body (1), and therefore the dead space inside the fixture body (1) can be effectively utilized to achieve miniaturization.

[0116] A lighting fixture (A1) according to a fifth aspect of the present disclosure can be realized by combining it with the fourth aspect. In the lighting fixture (A1) according to the fifth aspect, it is preferable that the power supply device (4) further includes a first printed circuit board (41) constituting an AC-DC conversion circuit that converts AC voltage to DC voltage, and a second printed circuit board (42) constituting a DC conversion circuit that steps down or steps up the DC voltage. It is preferable that the first printed circuit board (41) and the second printed circuit board (42) are arranged so as to surround a space inside the fixture body (1).

[0117] The lighting fixture (A1) according to the fifth aspect has the first printed circuit board (41) and the second printed circuit board (42) arranged in the dead space inside the fixture body (1), thereby making effective use of the dead space inside the fixture body (1) and achieving miniaturization.

[0118] A lighting fixture (A1) according to a sixth aspect of the present disclosure can be realized by combining it with the fifth aspect. In the lighting fixture (A1) according to the sixth aspect, it is preferable that the power supply device (4) further includes a first heat sink (43) thermally coupled to the first printed circuit board (41) and a second heat sink (44) thermally coupled to the second printed circuit board (42). It is preferable that at least one of the first heat sink (43) and the second heat sink (44) is disposed between the first printed circuit board (41) and the second printed circuit board (42) and a space.

[0119] The lighting fixture (A1) according to the sixth aspect thermally conducts heat generated in the first printed circuit board (41) and the second printed circuit board (42) to the first heat sink (43) and the second heat sink (44), and dissipates the heat from the first heat sink (43) and the second heat sink (44), thereby suppressing a temperature rise in the power supply device (4).

[0120] A lighting fixture (A1) according to a seventh aspect of the present disclosure can be realized by combining it with the sixth aspect. In the lighting fixture (A1) according to the seventh aspect, it is preferable that the power supply device (4) further includes a first heat conduction member (45) interposed between the first printed circuit board (41) and the first heat sink (43), and a second heat conduction member (46) interposed between the second printed circuit board (42) and the second heat sink (44).

[0121] The lighting fixture (A1) according to the seventh aspect can efficiently conduct heat generated in the first printed circuit board (41) and the second printed circuit board (42) to the first heat sink (43) and the second heat sink (44) through the first heat conduction member (45) and the second heat conduction member (46). As a result, the lighting fixture (A1) according to the seventh aspect can further suppress the temperature rise of the power supply device (4).

[0122] An illumination device (A1) according to an eighth aspect of the present disclosure can be realized by combining it with any one of the fifth to seventh aspects. In the illumination device (A1) according to the eighth aspect, it is preferable that one of the first printed circuit board (41) and the second printed circuit board (42) faces the space along the axial direction of the fixture body (1). It is preferable that the other of the first printed circuit board (41) and the second printed circuit board (42) faces the space along a direction intersecting the axial direction of the fixture body (1).

[0123] The lighting fixture (A1) according to the eighth aspect has the advantage that it is easier to reduce the size of the fixture body (1) compared to when the first printed circuit board (41) and the second printed circuit board (42) are arranged to face the space from the same direction.

[0124] A lighting fixture (A1) according to a ninth aspect of the present disclosure can be realized by combining it with any of the first to eighth aspects. In the lighting fixture (A1) according to the ninth aspect, it is preferable that the arm (5) protrudes outside the fixture body (1) from a side surface along the axial direction of the fixture body (1).

[0125] The lighting fixture (A1) according to the ninth aspect can be made smaller in size along the axial direction of the fixture body (1) than, for example, when the arm (5) protrudes from the axial end face of the fixture body (1) to the outside of the fixture body (1).

[0126] A lighting fixture (A1) according to a tenth aspect of the present disclosure can be realized by combining it with any of the first to eighth aspects. In the lighting fixture (A1) according to the tenth aspect, it is preferable that the arm (5) protrudes from the rear end of the fixture body (1) to the outside of the fixture body (1).

[0127] The lighting fixture (A1) according to the tenth aspect can be made smaller in the radial direction of the fixture body (1) than, for example, when the arm (5) protrudes outside the fixture body (1) from a side surface along the axial direction of the fixture body (1). [Explanation of symbols]

[0128] A1 Lighting fixture 1. Instrument body 4 Power supply 5 Arm 20 LEDs (light source) 41 First printed circuit board (printed circuit board) 42 Second printed circuit board (printed circuit board) 43 First heat sink 44 Second heat sink 45 First heat conducting member 46 Second heat conducting member 61 Mounting part (wall) 490 Bottom plate (wall) 611 First recess (space)

Claims

1. a cylindrical instrument body having at least an open front end; a light source housed in the fixture body and emitting light from the front end; a power supply device that turns on the light source; an arm that rotatably supports the tool body; Equipped with the arm protrudes from inside the tool body to outside the tool body, The power supply device is disposed inside the tool body and outside the rotatable space of the arm. Lighting fixtures.

2. The arm further includes a mounting portion to which the arm is rotatably mounted within the interior of the tool body.

2. The lighting fixture of claim 1.

3. a wall disposed inside the fixture body between at least a portion of the power supply device and the space; 3. The lighting fixture according to claim 1 or 2.

4. the power supply comprises one or more printed circuit boards; The printed circuit board is disposed within the interior of the appliance body so as to surround the space.

3. The lighting fixture according to claim 1 or 2.

5. the power supply device further includes a first printed circuit board constituting an AC / DC conversion circuit that converts AC voltage into DC voltage, and a second printed circuit board constituting a DC conversion circuit that steps down or steps up the DC voltage; the first printed circuit board and the second printed circuit board are arranged in the interior of the appliance body so as to surround the space; 5. The lighting fixture of claim 4.

6. the power supply device further includes a first heat sink thermally coupled to the first printed circuit board and a second heat sink thermally coupled to the second printed circuit board; at least one of the first heat sink and the second heat sink is disposed between the first printed circuit board and the space; and 6. The lighting fixture according to claim 5.

7. the power supply device further includes a first thermally conductive member interposed between the first printed circuit board and the first heat sink, and a second thermally conductive member interposed between the second printed circuit board and the second heat sink.

7. The lighting fixture of claim 6.

8. one of the first printed circuit board and the second printed circuit board faces the space along an axial direction of the appliance body; the other of the first printed circuit board and the second printed circuit board faces the space along a direction intersecting the axial direction of the appliance body; 6. The lighting fixture according to claim 5.

9. The arm protrudes from a side surface of the instrument body along the axial direction thereof to the outside of the instrument body.

3. The lighting fixture according to claim 1 or 2.

10. The arm protrudes from the rear end of the tool body to the outside of the tool body.

3. The lighting fixture according to claim 1 or 2.

Images