Lighting device

Abstract

To solve the problem that the size is likely to be increased in a lighting device 1 in which a light source unit 10 is attached to an arm 20 attached to an attached part.SOLUTION: A lighting device 1 is equipped with: a plate-like arm main part 21; an arm 20 having arm support parts 22 provided so as to protrude in a pair from both end sides of the arm main part 21; a light source unit 10 having a base part 13 provided with a plate-like base main part 131 on one surface of which a light emission part 11 is attached, which is disposed between the arm support parts 22 provided in a pair, and in which the other surface of the base main part 131 is attached to the arm 20 so as to face the arm main part 21; and a power supply device 16 disposed with a space for the other surface without a heat radiation member being provided between the other surface and the power supply device 16, and on the other surface. By this arrangement, an increase in the size of the lighting device 1 can be suppressed, and heat radiation performance can be secured even without providing such a heat radiation fan to be erected in the base part 13.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] 2. Description of the Related Art Conventionally, there has been a lighting device in which a light source unit is attached to an arm attached to a mounting portion such as a ceiling.

[0002] For example, the lighting device has a plate-like horizontal portion to which the arm is attached and a pair of plate-like vertical portions that protrude vertically from both ends of the horizontal portion, and the light source unit is attached so as to be suspended from the pair of vertical portions. This light source unit has a base portion to which a light-emitting board is attached, a power supply device that supplies power to the light-emitting board, and a connecting portion that connects the base portion and the power supply device (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-57466 A [Patent Document 2] JP 2019-106244 A [Patent Document 3] JP 2015-062159 A [Patent Document 4] JP 2019-153530 A [Patent Document 5] JP 2018-133262 A [Patent Document 6] JP 2020-021547 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, this lighting device has connecting parts that stand upright on both sides of the base part, and the power supply device is attached to the connecting parts so as to face the base part, and the box shape is made strong enough to prevent deformation due to external loads such as vibrations. Therefore, there is a risk that the lighting device will become large in size. Furthermore, since heat dissipation fins are provided between the plate and the power supply unit, the lighting device may become large.

[0005] Therefore, the present disclosure has been made to solve the above-mentioned problems, and has an object to provide a lighting device that is prevented from becoming large. Effect of the Invention

[0006] The lighting device of the present disclosure can be prevented from becoming large. In addition, by disposing the power supply device with a gap between it and the base of the light source unit, it is possible to suppress the influence of heat on each other between the power supply device and the base, and the light source unit can ensure heat dissipation without providing heat dissipation fins that stand on the base. . [Brief description of the drawings]

[0007] [Figure 1] 1 is a perspective view of a lighting device according to a first embodiment. [Diagram 2] 1 is an exploded perspective view of a lighting device according to a first embodiment. [Diagram 3] 1 is an exploded perspective view of a lighting device according to a first embodiment. [Figure 4] FIG. 2 is a perspective view of a base portion according to the first embodiment. [Diagram 5] FIG. 2 is a perspective view of a connecting portion in the first embodiment. [Figure 6] FIG. 11 is a reference diagram relating to attachment of a connecting portion in the first embodiment. [Figure 7] 3 is a perspective view of a power supply holding unit according to the first embodiment. [Figure 8] FIG. 2 is a perspective view of a power supply unit according to the first embodiment. [Figure 9] FIG. 2 is a perspective view of an arm according to the first embodiment. [Figure 10] FIG. 2 is a development view of an arm in the first embodiment. [Figure 11] 2 is a cross-sectional view taken along the line AA' of the lighting device 1 in the embodiment 1. FIG. [Figure 12] 3 is an enlarged view of a portion B of the lighting device 1 in the embodiment 1. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Embodiment 1 The present disclosure relates to a lighting fixture that is prevented from becoming large. Hereinafter, as an embodiment of the present disclosure, a lighting device 1 that is attached to a mounting portion such as a ceiling will be described. In the following description, terms indicating directions are used as appropriate, but these terms are for the purpose of explanation and do not limit the lighting fixture. Examples of terms indicating directions include "up," "down," "right," "left," "front," and "rear." In addition, in each of the figures described below, the Z axis indicates the up-down direction, the X axis indicates the left-right direction, i.e., the horizontal direction, and the Y axis indicates the front-rear direction, i.e., the depth direction. The X axis, Y axis, and Z axis are perpendicular to each other, the X axis and the Y axis are horizontal, and the Z axis is vertical. Note that these names are determined for the convenience of explanation and do not limit the arrangement and orientation of the devices and parts, etc.

[0009] The configuration of each part of the lighting device 1 will be described with reference to FIGS. FIG. 1 is a perspective view of the lighting device 1. FIG. 2 is an exploded perspective view of the lighting device 1 shown in FIG. 1, viewed from the downward direction Z2 side. FIG. 3 is an exploded perspective view of the lighting device 1 shown in FIG. 1, viewed from the upward direction Z1 side. FIG. 4 is a perspective view of the base part 13 shown in FIG. 2. FIG. 5 is a perspective view of the connecting part 14 shown in FIG. 2, where (a) of FIG. 5 is a perspective view viewed from the right direction X1 side, and (b) of FIG. 5 is a perspective view viewed from the left direction X2 side. FIG. 6 is a reference view showing a process of attaching the connecting part 14 shown in FIG. 5 to the base part 13, where (a) of FIG. 6 is a reference perspective view showing a state in which the connecting part 14 and the base part 13 are separate, and (b) of FIG. 6 is a reference perspective view showing a state in which the connecting part 14 is attached to the base part 13. FIG. 7 is a perspective view of the power supply holding unit 15 shown in FIG. 2, where (a) of FIG. 7 is a perspective view seen from the upper Z1 side, and (b) of FIG. 7 is a perspective view seen from the lower Z2 side. FIG. 8 is a perspective view seen from the rear Y2 side in a state where the case cover 1632 of the power supply device 16 shown in FIG. 2 is removed. FIG. 9 is a perspective view of the arm 20 shown in FIG. 2. FIG. 10 is an expanded view of the arm 20 shown in FIG. 9, where (a) of FIG. 10 is a plan view seen from the upper Z1 direction, (b) of FIG. 10 is a front view seen from the front Y1 direction, and (c) of FIG. 10 is a side view seen from the right X1 direction. FIG. 11 is a cross-sectional view of the lighting device 1 shown in FIG. 1 cut along a plane passing through AA′ and perpendicular to the X-axis and Z-axis. FIG. 12 is an enlarged view of part B shown in FIG. 11.

[0010] The lighting device 1 includes a light source unit 10, an arm 20 attached to a mounting portion, and a connection member 30 connecting the light source unit 10 and the arm 20. In the lighting device 1, the light source unit 10 is held by the connection member 30 on the arm 200 so as to be rotatable in the depth direction Y.

[0011] The light source unit 10 includes a light emitting portion 11 , a cover portion 12 , a base portion 13 , a connecting portion 14 , a power supply holding portion 15 , and a power supply device 16 .

[0012] The light emitting section 11 includes a plurality of light emitting elements 111 and a substrate 112 on which the plurality of light emitting elements 111 are mounted. The substrate 112 is a flat electronic substrate. A plurality of light emitting elements 11 are mounted on a mounting surface 1121, which is one surface of the mounting substrate 112. The substrate 112 is also provided with wiring conductors (not shown) that electrically connect the electrodes of the plurality of light emitting elements 111. The substrate 112 is also provided with a substrate terminal 113 for power supply at one end thereof. An electric wire 50 is connected to the substrate terminal 113 to receive power supply from the power supply device 16. The substrate terminal 113 is disposed on the rear direction Y2 side of the mounting substrate 112 in FIG. 2.

[0013] The cover portion 12 is formed of a transparent material and serves to protect the light emitting portion 11. The cover portion 12 is attached to the base portion 13 so as to cover the light emitting portion 11. The cover part 12 has a box-shaped cover main part 121 that is open on the upward direction Z1 side, and a cover flange part 122 that protrudes in the horizontal direction XY from the periphery of the opening of the cover main part 121. A cover through hole 123 for fixing the cover part 12 to the base part 13 is formed in the cover flange part 122b. The cover portion 12 may be provided with a lens (not shown) on the surface of the cover main portion 121 facing the light emitting portion 110, for controlling the light from the light emitting element 111 to a predetermined light distribution.

[0014] The light emitting unit 11 is attached to the base unit 13. The base unit 13 transmits heat generated when the light emitting unit 11 emits light and dissipates the transmitted heat. The base unit 13 has a base main portion 131 and a base flange portion 132. The base portion 13 is formed by bending, by press working or the like, a plate material made of aluminum or the like that has good heat dissipation properties and is lighter than iron or the like.

[0015] The light source unit 110 is attached to the base main part 131. The base main part 131 is a rectangular plate-like metal member, and is attached so that the surface opposite to the mounting surface 1121 of the substrate 112 abuts against the base main part 131. The base main part 131 is provided with a base through-hole 1311, a base protrusion 1312, and a base electric wire insertion part 1313. The base through-hole 1311 is an opening that penetrates the base main part 131 in the up-down direction Z, and is provided adjacent to a side edge of the base main part 131. The base through-hole 1311 is provided so as to communicate with the cover through-hole 123 when the cover part 12 is placed on the base part 13. The side edge of the base main part 131 is illustrated by a dotted line A in FIG. The base protrusion 1312 is provided to protrude in the upward Z1 direction on a base upper surface 131a, which is the surface on the upward Z1 side of the base main portion 131. The base protrusion 1312 is disposed along the side edge of the base main portion 131 so as to sandwich the base through-hole 1311 therebetween. The base electric wire insertion portion 1313 is an opening penetrating the base main portion 131 in the up-down direction Z, and the electric wire 50 is inserted through the base electric wire insertion portion 1313. The base electric wire insertion portion 1313 is provided adjacent to an end portion of the light emitting portion 11 on the side where the board terminal 113 is arranged, in a state where the light emitting portion 11 is arranged on the base portion 13. In FIG. 2, the base electric wire insertion portion 1313 is provided on the rear direction Y2 side.

[0016] The base flange 132 is a portion that protrudes downward in the Z2 direction from each side of the base main part 131. The base flange 132 is provided perpendicular to the base main part 131 and reinforces the rigidity of the base main part 131. The base flange portion 132 has a flange main body portion 1321 and a fitting portion 1322. Two flange main bodies 1321 are disposed with a gap therebetween on one side of the base main portion 131. The fitting portion 1322 is a portion between the two flange main bodies 1321, and a part of the connecting portion 14 and the power supply holding portion 15 is fitted into the fitting portion 1322. Furthermore, since the base flange portion 132 protrudes downward in the Z2 direction, accumulation of dust or water on the base 13 can be suppressed compared to when the base flange portion 132 protrudes upward in the Z1 direction.

[0017] The connecting parts 14 are connected to the arms 20 and are arranged in pairs on the base part 130 so as to face each other in the width direction X. The connecting parts 14 have a pillar part 141, a pillar side part 142, a base fixing part 143, and a cover holding part 144. Furthermore, the connecting portion 14 is made of a metal material such as iron or stainless steel that is stronger than the base portion 12 .

[0018] The pillar portion 141 has a rectangular plate shape and is provided so as to protrude upward in the Z1 direction from the base main portion 131. The pillar portion 141 has a pillar connection portion 1411 to which the connection member 30 is connected. The pillar connection portion 1411 is provided so as to protrude from the right direction X1 side, which is the outside of the pillar main portion 141, toward the left direction 2, which is the inside, in Fig. 5, and has an opening that penetrates in the width direction X. A spiral groove is formed on the inner surface of the opening of the pillar connection portion 1411, and the connection member 30 is screwed and attached.

[0019] The pillar side parts 142 are formed on both sides of the pillar main part 141 in the depth direction Y, and protrude from the outer side, which is the right direction X1 side, to the inner side, which is the left direction X2 side in Fig. 5. The pillar side parts 142 have an attachment side part 1421 and a contact side part 1422. The mounting side portion 1421 protrudes from one side of the column main portion 141 in the width direction X, and a fall prevention wire is attached to it. The contact side portion 1422 protrudes from the side edge of the column main portion 141 opposite the mounting side portion 1421 in the width direction X, and is configured to abut against the base main portion 131 when the connecting portion 14 is attached to the base portion 13.

[0020] The base fixing part 143 is formed on a side edge of the column part 141 on the downward direction Y2 side. The base fixing part 143 protrudes from the outside, which is the right direction X1 side, to the inside, which is the left direction X2 in Fig. 5, in the same way as the column side part 142. The base fixing part 143 is provided with a connecting part fixing part 1431 that penetrates in the up-down direction Y. The connecting part fixing part 1431 has an inner surface formed with a spiral groove, and a screw-shaped cover fixing member 40 is inserted and screwed into the cover through-hole 123 and the base through-hole 123 from the downward direction Z1, connecting the cover part 12, the base part 13 and the connecting part 14 to be integrated.

[0021] The cover holding portion 144 is provided from the downward Z2 side edge of the column main portion 141 so as to protrude further in the downward Z2 direction than the base fixing portion 143. The cover holding portion 144 has a holding vertical portion 1441 and a holding horizontal portion 1442. The holding vertical portion 1441 protrudes downward in the Z2 direction beyond the base fixing portion 143 and is fitted into the fitting portion 1322. The holding horizontal portion 1442 protrudes from the end of the holding vertical portion 1441 on the downward direction Z2 side from the outer side, which is the right direction X1 side, to the inner side, which is the left direction X2 in Fig. 5. The holding vertical portion 1442 is disposed on the downward direction Y2 side of the cover flange portion 122 in a state in which the cover portion 12 and the connecting portion 14 are attached to the base portion 13, and prevents the cover portion 12 from falling off.

[0022] A method of attaching the connecting part 14 to the base part 13 will be described with reference to Fig. 6. Fig. 6(a) shows the base part 13 and the connecting part 14 in a separate state. Note that the cover part 12 is in a state in which it is disposed on the base part 13. Fig. 6(b) shows the state in which the connecting part 14 is attached to the base part 13. 6(a), the connecting portion 14 moves from the right direction X1 side, which is the outside, to the left direction X2, which is the inside, in the width direction X, and the base fixing portion 143 is fitted between the pair of base protrusions 1312, and the holding vertical portion 1411 is fitted into the fitting portion 1322. The connecting portion fixing portion 1431 is continuous with the cover through hole 123 and the base through hole 123 in the up-down direction Z. In this state, the cover fixing member 40 is inserted into the cover through hole 123 and the base through hole 123 from the downward direction Y2 side and screwed into the connecting portion fixing portion 1431, and the connecting portion 14 is fixed to the base portion 13 together with the cover portion 12. At this time, the contact side portion 1421 has a downward Y2 side end portion abutting against the base main portion 131. The method of attaching the connecting parts 14 shown in FIG. 6 illustrates one side of the pair of connecting parts 14 disposed on the base part 13, but the other connecting part 14 is attached in the same manner.

[0023] The connecting portion 14 is stably attached to the base portion 13 by fitting the base fixing portion 143 between the pair of base protrusions 1312 and fitting the holding vertical portion 1411 into the fitting portion 1322, thereby suppressing movement in the depth direction Y. In addition, this also serves to position the connecting portion 14 when attaching it to the base portion 13, making assembly easier. Furthermore, the connecting portion 14 has a diagonal brace effect for the pillar portion 141 and the base main portion 131 by the contact side portion 1421 abutting against the base main portion 131, and can suppress deformation of the pillar portion 141 in the width direction X when an external load such as vibration is applied. Therefore, the rigidity of the lighting fixture 1 can be improved.

[0024] The power supply holding portion 15 fixes the power supply unit 16 to the base portion 13 with a gap therebetween, and has a long main holding portion 151 and holding legs 152 protruding from each of the longitudinal ends of the main holding portion 151. The power supply holding part 15 is disposed on the base part 130 so that the longitudinal direction of the main holding part 151 is in the depth direction Y, and fixes the power supply device 16 to the base part 13 so that the pair of connecting parts 14 are perpendicular to the opposing direction. The power supply holding part 15 is formed shorter than the base part 13 in the width direction X, and is formed to have the same length as the base part 13 in the depth direction Y. The power supply holding part 15 fixes the power supply device 16 to the base part 13 so that the surface of the base part 13 on the upward direction Z1 side is exposed.

[0025] The main holder 151 is formed in a long plate shape and has a main opening 1511 and a main cutout 1512. The main portion opening 1511 is formed in a rectangular shape so as to increase the area of ​​the power supply device 16 exposed to the outside air. In addition, the main holding portion 151 can be made lighter by providing the heat dissipation openings 111. The main part cutout 1512 is a portion through which the electric wire 50 for electrically connecting the light emitting part 11 and the power supply device 16 is inserted, and is provided on one end side of the depth direction Y of the main holding part 151. The main part cutout 1512 is provided on the rear direction Y2 side of the main holding part 151 in Fig. 7. The main part cutout 1512 is provided so as to open elongatedly along the width direction X from one side part in the width direction X of the main holding part 151, and the electric wire 50 can be inserted and hooked from one side part in the width direction X.

[0026] The holding legs 152 are provided so as to protrude downward in the Z2 direction from both ends in the depth direction Y, which is the longitudinal direction of the main holding part 151, and have a main leg part 1521, a horizontal leg part 1522, and a leg protrusion part 1523.

[0027] The leg main part 1521 is provided so as to protrude in a plate shape from the holding main part 151 in the downward direction Z2, and is provided with part attachment holes 1524 to which functional parts such as a communication unit and a protective net (not shown) are attached.

[0028] The leg horizontal section 1522 is provided so as to protrude perpendicularly from the side edge on the downward direction Z2 side of the leg main section 1521 toward the inside in the depth direction Y. The leg horizontal section 1522 has a leg fixing section 1525 provided so as to penetrate in the up-down direction Z. The leg fixing section 1525 has an inner surface formed with a spiral groove, and a screw-shaped cover fixing member 40 is inserted and screwed into the cover through-hole 123 and the base through-hole 123 from the downward direction Z1, connecting the cover section 12, the base section 13 and the power supply holding section 15 so as to be integrated.

[0029] The leg protrusion 1523 is provided from the side edge of the leg main part 1521 in the downward direction Z2 so as to protrude further in the downward direction Z2 than the leg horizontal part 1522. The leg protrusion 1523 is fitted into the fitting part 1322 when the power supply holding part 15 is attached to the base part 13, and suppresses movement of the power supply holding part 15 in the width direction X. In addition, it serves as a part that determines the position when the power supply holding part 15 is attached to the base part 13, making the attachment easier.

[0030] The power supply device 16 converts power supplied from an external source to control the lighting of the light-emitting unit 11, and is fixed to the base unit 13 by a power supply holding unit 15. The power supply device 16 is formed to be shorter than the base unit 13 in the width direction X, and is formed to have the same length as the base unit 13 in the depth direction Y. The power supply device 16 has a lighting circuit 161, a terminal block 162, a power supply case 163, and a terminal block case 164.

[0031] The lighting circuit 161 is a circuit for supplying power to the light-emitting unit 11, and has electronic elements such as a capacitor mounted on a long, plate-like power supply board 1611. The lighting circuit 161 has a power conversion circuit that converts power supplied from an external power source such as a commercial power source into a direct current required for lighting the light-emitting unit 11, and a control circuit that controls the power conversion circuit. The power conversion circuit is composed of, for example, a full-wave rectifier, a step-up chopper circuit, and a step-down chopper circuit. The control circuit obtains operation information related to dimming input from an operation terminal that accepts user operations, and dims the light emitted from the light-emitting element 10 by controlling the power conversion circuit in accordance with the obtained operation information. The lighting circuit 161 has an input connector 1612 and an output connector 1613 on a power supply board 1611. The input connector 1612 is arranged on the terminal block 162 side of the power supply board 1611, and is connected to an internal electric wire 1614 connected to the terminal block 162. The input connector 1612 inputs commercial power supplied via the internal electric wire 1614 to the power conversion circuit. The output connector 1613 is disposed at the end of the power supply board 1611 opposite to the input connector 161 in the depth direction Y. The output connector 1613 is connected to an electric wire 50 and outputs power controlled by the power conversion circuit and the control circuit.

[0032] The terminal block 162 is adapted to have a power line (not shown) electrically connected to a commercial power source fixed thereto, and is disposed on one end side of the power supply device 16 in the depth direction Y, on the front direction Y1 side in FIG. The terminal block 162 is provided with a power line socket 1621, and the power line is fixed by inserting an end of the power line into the power line socket 1621. The terminal block 162 and the lighting circuit 161 are electrically connected, and the lighting circuit 161 and an external power source are electrically connected via the terminal block 162 and the power line. The terminal block 162 is disposed so that the power line socket 1621 faces the front direction Y1 side of the depth direction Y in FIG.

[0033] The power supply case 163 is a metal case that covers the lighting circuit 161 , and has a case main part 1631 and a case lid part 1632 . The case main part 1631 is formed in an elongated shape along the depth direction Y, and is provided with a terminal block attachment part 1631a for holding the terminal block 162 on the front direction Y1 side, which is one end side of the depth direction Y, and a case cutout part 1631b through which the power supply 50 is inserted, on the rear direction Y2 side, which is the other end side of the depth direction Y. The case cutout part 1631b is provided so as to open elongatedly along the depth direction Y from an end part of the rear direction Y2 part of the depth direction Y in FIG. 8, and the electric wire 50 can be inserted and hooked from the rear direction Y2. The case lid portion 1632 is provided to cover the lighting circuit portion 161 from the upward Z1 side, and prevents dust or water from accumulating in the lighting circuit 162.

[0034] The terminal block case 164 is a metal case that covers the terminal block 162, and the terminal block 162 is rotatably attached to the case cover 1632 so as to expose the power line insertion port 1621. The terminal block case 164 is formed with a notch so that the power line fixed to the terminal block 162 can be pulled out from the downward Y2 side.

[0035] The power supply holding unit 15 and the power supply device 16 are provided so that the main part cutout portion 1512 and the case cutout portion 1631b are perpendicular to each other. The electric wire 50 is inserted into the case cutout portion 1631b from the rear direction Y2 side, and then inserted into the main part cutout portion 1512 from the left direction X2 side, so that the electric wire 50 is held so as to suppress movement in the horizontal direction XY. By holding the electric wire 50 in this manner, the work can be made easier than inserting the end of the electric wire 50 into a circular through hole of a member, and assembling is improved. In addition, the electric wire 50 is arranged so that the main part cutout portion 1512 and the case cutout portion 1631b are arranged next to the base electric wire through hole 1311 of the base part 13 in the vertical direction Z, and the board terminal 113 of the light-emitting part 11 is arranged adjacent to the base electric wire through hole 1311, so that the electric wire can be arranged in a straight line in the vertical direction Y from the output connector 1613 to the board terminal 113, thereby preventing the electric wire from becoming long.

[0036] Because the power supply holding part 15 and the power supply device 16 are formed shorter than the base part 13 in the width direction X, the power supply device 16 can be attached to the base part 13 without covering the entire surface of the base part 13 on the upward Z1 side, and the base part 13 can efficiently dissipate heat from the light emitting part 11 without being blocked from dissipating the heat. Since the base part 13 has exposed parts that are not covered by the power supply holding part 15 and the power supply device 16 in a plane viewed from the upward Z1 direction, heat can be dissipated by suppressing accumulation of heat between the power supply holding part 15 and the power supply device 16. Furthermore, the power supply device 16 is attached to the base portion 13 by the power supply holding portion 15, and is disposed with a gap between the power supply device 16 and the base portion 16, thereby making it possible to prevent the power supply device 16 and the base portion 13 from being affected by heat from each other. The light source unit 10 can ensure heat dissipation even without providing a heat dissipation fin that stands upright from the base main portion 131 in the upward direction Z1.

[0037] The arm 20 is a member for fixing the lighting device 1 to the mounting portion, and has an arm main part 21 that abuts against the mounting portion, an arm support part 22 that holds the light source unit 10, and an arm flange part 23 that improves the strength of the arm 20. The arm 20 is formed integrally with the arm main part 21 and the arm support part 22 by processing a plate-shaped metal member, and is made of a strong metal member such as iron or stainless steel. The arm 20 has an arm main portion 21 formed to extend in the width direction X, an arm support portion 22 formed to extend from the arm main portion 21 toward the downward direction Z2, and arm flange portions 23 provided on both sides of the arm 10 in the depth direction Y.

[0038] The arm main portion 21 is formed in a rectangular shape that is long in the width direction X, and is provided with a pair of main portion through holes 211 into which hanging bolts, which are fixing fittings, are inserted. The main portion through hole 211 is provided at a position facing the base portion 13 when the arm 20 is attached to the light source unit. The main part through hole 211 has a first main part through hole 2111 and a second main part through hole 2112. The first arm main part through hole 2111 is formed on the rightward direction X1 side of the center in the width direction X of the arm main part 21. The first main part through hole 2111 has a shape combining an elongated hole extending in the width direction X and a circular hole. The second arm main through hole 2112 is formed on the left direction X2 side of the center in the depth direction X of the arm base 21. The second main through hole 2112 is an elongated hole extending in the depth direction Y. The lighting device 1 is fixed to the mounting portion by inserting a hanging bolt into the main part through hole 211 and sandwiching the arm main part 21 between the mounting portion and a nut that screws onto the hanging bolt. Note that, although the first main part through hole 2111 and the second main part through hole 2112 have been described as having different shapes, they may have the same shape.

[0039] The arm support portions 22 are formed in a pair so as to protrude downward in the Z2 from both ends of the arm main portion 21 in the width direction X. The arm support part 22 is provided in a plate shape so as to protrude downward in the Z2 direction from the end part in the width direction X of the arm main part 2. The arm support part 22 has an arm bending part 221, an arm vertical part 222, and an arm connection part 223, which are arranged in this order from the upward direction Z1 side to the downward direction Z2 side.

[0040] The arm bend portion 221 is a portion that protrudes in the width direction X from the end portion of the arm main portion 21 on the width direction X side so as to be away from the arm main portion 210, and as it protrudes in the width direction X, it draws an arc in the downward direction Z2. The arm bent portion 221 extends from the arm main portion 21 in the width direction X, and extends from the arm vertical portion 222 in the up-down direction Z, and the intersection point is formed into an arc shape. The arm bending portion 221 is provided with a rectangular bending portion through hole 2211 at the end portion on the upward Z1 side. The bending portion through hole 2211 is attached to a mounting portion by a fixing metal fitting inserted from the width direction X.

[0041] The arm vertical portion 222 is a portion that protrudes in the downward direction Z2 from the end portion of the arm bending portion 221 on the downward direction Z2 side, and is provided so as to connect the arm bending portion 221 and the arm connecting portion 223.

[0042] The arm connection portion 223 is a portion that protrudes in the downward direction Z2 from the end portion on the downward direction Z2 side of the arm vertical portion 222, and is provided with an arm insertion hole 2231 having a circular hole shape. The arm connection part 223 is a part that is connected to the coupling part 14 of the light source unit 10 by the connection member 30. The arm connection part 223 abuts and connects to the pillar main part 141 of the coupling part 14 by fastening the connection member 30 to the pillar connection part 1411 in a state where the connection member 30 is inserted into the arm insertion hole 2231. The arm connection portion 223 is provided so as to protrude further in the downward direction Z2 than the base main portion 131 and to come into contact with the base flange portion 132 when the arm is attached to the light source unit 10.

[0043] The arm flange portion 23 improves the strength of the arm 20, and is integrally provided so as to protrude inward in the width direction X from the side edges in the depth direction Y of the arm support portion 22, the arm bent portion 221 and the arm vertical portion 222. The arm flange portion 23 suppresses deformation of the arm 20 so as to be twisted in the horizontal direction XY. When the light source unit 20 is attached to the arm 20 and an external load such as vibration causes the light source unit 20 to swing in the width direction X, the arm flange portion 23 can suppress deformation of the arm 20 in the width direction X. In particular, the portion of the arm flange portion 23 protruding from the arm bent portion 221 acts as a brace between the arm support portion 22 and the arm vertical portion 222, and can suppress deformation of the arm 20.

[0044] The arm 20 holds the light source unit 10 by sandwiching it in the width direction X with the pair of arm support parts 22. The arm 20 holds the light source unit 20 so as not to rotate by fastening the connection member 30 to the connection part 1411 so that the arm connection part 223 presses the column main part 1411 of the first coupling part 1401. Then, the arm 20 holds the light source unit 20 so as to be able to rotate in the depth direction Y by loosening the fastening of the connection part 1411 of the connection member 30.

[0045] When the arm 20 is attached to the light source unit 10, the arm connection portion 223 is arranged to protrude downward Z2 further than the base main portion 131 and abut against the base flange portion 132, thereby covering the connection between the base portion 13 and the connecting portion 14 from the width direction X side and clamping the base portion 13. Therefore, the arm 20 can prevent the base portion 13 from moving in the horizontal directions X and Y due to an external load such as vibration. Also, the connection portion between the base portion 13 and the connecting portion 14 can be prevented from being damaged due to a load applied thereto. Since the arm 20 covers the connection between the base portion 13 and the connecting portion 14, the load on the light source unit 10 can be reduced, and the base portion 13 and the connecting portion 14 can be provided separately, and the base portion 13 can be formed from a lightweight material such as aluminum. Since the connecting portion 14 of the lighting device 1 is formed shorter than the base portion 13 in the depth direction Y, less material can be used than if the connecting portion were provided along the entire lateral length of the base portion 13, resulting in a lighter weight.

[0046] When the arm 20 is attached to the light source unit 10, the arm connection portion 223 protrudes downward in the Z2 direction further than the base main portion 131 to clamp the light source unit 10, thereby allowing the base portion 13, connecting portion 14, power supply unit 16, and other components made of aluminum, iron, or stainless steel to be contained within the area surrounded by the arm main portion 21 and the arm support portion 22, and preventing the center of gravity of the light source unit 10 from being located downward in the Z2 direction further than the arm 20.

[0047] The connecting member 30 is in the shape of a bolt and includes a cylindrical threaded portion 310 and a head portion 320 provided on one end side of the threaded portion 310 . The screw portion 310 is cylindrical and has a threaded outer periphery, and is screwed into the connecting portion 1413 . Head 320 has a hexagonal column shape formed with a diameter larger than that of threaded portion 310. When threaded portion 310 is tightened into connecting portion 1413, head 320 presses arm connecting portion 223 against column main portion 1411 with the surface on the threaded portion 320 side. It should be noted that head 320 may be in the shape of a polygonal column instead of a hexagonal shape, and may be provided with a recess into which a tool such as a screwdriver can be inserted. Also, the head portion 320 of the connecting member 30 may be configured to press the column main portion 144 via a washer or the like.

[0048] 11, in a state where the arm 20 is attached to the light source unit 10 so as to sandwich it in the width direction X, the power supply device 16 is attached to the base part 13 along the depth direction Y by the power supply holding part 15, so that the main part through holes 211 of the arm 20 face each other. Therefore, as shown by the dotted line C in FIG. 11, the space on the downward direction Z2 side of the case main part 1631 of the power supply device 16 in the width direction X can also be used as a working space for fixing the arm 20 to the attachment part, and the workability can be improved without making the lighting device 1 larger.

[0049] In the lighting device 1, the holding leg parts 152 are formed shorter than the base part 13 in the width direction X, and the connecting parts 14 and the arm support parts 22 are formed shorter than the base part 13 in the depth direction Y, and the power supply unit 16 is disposed away from the base part 13 in the upward direction Z1, so that air can pass obliquely above the Z1 side of the base part 13 in the width direction X, depth direction Y and horizontal direction XY, and heat can be dissipated efficiently from the base part 13. In the lighting device 1, the four corners of the base part 13 are not covered by other members in the horizontal direction XY, and the power supply unit 16 is disposed away from the base part 13 in the upward direction Z1, so that air can pass obliquely above the Z1 side of the base part 13, and heat can be dissipated efficiently from the base part 13.

[0050] The present disclosure is a lighting device 1 including a light source unit 10 having a plate-shaped base main part 131 with a light-emitting part 11 attached to one surface thereof, and an arm 20 having a plate-shaped arm main part 21 and arm support parts 22 provided so as to protrude in a pair from both ends of the arm main part 21 in the downward direction Z2. The light source unit 10 is sandwiched and held between the arm support parts 22 provided in a pair so that the other surface of the base main part 13 faces the base main part 13, and the arm 20 has the arm support parts 22 protruding in the downward direction Z2 from the base main part 131, so that the base part 13 can be prevented from moving in the horizontal direction XY due to an external load such as vibration. Therefore, deformation of the light source unit 10 can be prevented, and the rigidity of the light source unit 1 can be maintained without using a box-shaped structural member, and the light source unit 10 can be prevented from becoming large.

[0051] In the present disclosure, the base main portion 131 has a base flange portion 132 that protrudes downward from the side edge in the Z2 direction, and the arm support portion 22 is The arm 20 is in surface contact with the flange portion 132, thereby enabling the arm 20 to stably hold the light source unit 10.

[0052] In the present disclosure, the light source unit 10 has a connecting portion 14 to which an arm 20 is attached by a connecting member 30 disposed on the other side of the base main portion 1311, and the arm 20 has an arm connection portion 22 which covers the connection point between the base main portion 132 and the connecting portion 14 from the width direction X side, thereby preventing the connection point between the base portion 132 and the connecting portion 14 from being damaged due to load being applied thereto.

[0053] The present disclosure relates to a lighting device 1 including a light source unit 10 having a base portion 13 on one surface of which a light emitting portion 11 is attached, and an arm 20 having a plate-shaped arm main portion 21 and arm support portions 22 provided to protrude in pairs from both ends of the arm main portion 21 in the downward direction Z2. The light source unit 10 is attached to the arm 20 so as to be disposed between the pair of arm support portions 22, and includes a power supply unit 16 formed shorter than the base portion 13 in the opposing direction of the pair of arm support portions 22, and a power supply holding portion 15 for attaching the power supply unit 16 to the base portion 13 so as to be perpendicular to the opposing direction of the pair of arm support portions 22. This makes it possible to prevent the main portion through hole 211 provided in the arm main portion 21 from facing the power supply unit 16, and makes it possible to make the space between the power supply unit 16 and the arm support portion 22 a working space for attaching the arm 20 to the attachment portion. Therefore, the working space can be increased without increasing the space between the power supply unit 16 and the arm main portion 21, and the lighting device 1 can be prevented from becoming large.

[0054] In the present disclosure, the power supply holding section 15 has holding legs 152 provided to stand upright from the base section 13 in the opposing direction of the paired arm support sections 22, and the power supply unit 16 is disposed on the base section 13 with a gap therebetween in the up-down direction Z. Therefore, in the lighting device 1, the area below the power supply unit 14 in the Z2 direction between the power supply unit 1 and the arm support section 22 can be used as a working space, and the lighting device 1 can be prevented from becoming larger in size.

[0055] In the present disclosure, the cover portion 12 and the base portion 13 of the lighting device 1 are described as being rectangular in plan view from the downward Z2 side, but they may be circular. For example, the cover portion may have a cylindrical cover main portion and a disk-shaped cover flange portion. The base portion may have a disk-shaped base main portion and a disk-shaped base flange portion. The cover main portion may also be semispherical.

[0056] Although a lighting device has been described in the embodiments of the present disclosure, the above embodiments are merely examples of lighting devices for embodying the technical ideas of the present invention, and the present invention is not limited to these. The present invention may be equally applied to other embodiments, such as those in which the respective embodiments and examples are appropriately modified or a combination of these. [Explanation of symbols]

[0057] 1 lighting device, 10 light source unit, 11 light emitting portion, 111 light emitting element, 112 board, 1121 mounting surface, 113 board terminal, 12 cover portion, 121 cover main portion, 122 cover flange portion, 123 cover through hole, 13 base portion, 131 base main portion, 1311 base through hole, 1312 base protrusion portion, 1313 base electric wire insertion portion, 132 base flange portion, 1321 flange main body portion, 1322 fitting portion, 14 connecting portion, 141 column main portion, 1411 column connection portion, 142 column side portion, 1421 mounting side portion, 1422 contact side portion, 143 base fixing portion, 1431 connecting portion fixing portion, 144 cover holding portion, 1441 holding vertical portion, 1442 horizontal holding portion, 15 power supply holding portion, 151 main holding portion, 1511 main portion opening, 1512 main portion cutout portion, 152 holding leg portion, 1521 leg main portion, 1522 leg horizontal portion, 1523 leg protrusion portion, 1524 part mounting hole, 1525 leg fixing portion, 16 power supply unit, 161 lighting circuit, 1611 power supply board, 1612 input connector, 1613 output connector, 162 terminal block, 1621 power supply line socket, 163 power supply case, 1631 case main portion, 1631a terminal block mounting portion, 1631b case cutout portion, 1632 case cover portion, 164 terminal block case, 20 arm, 21 arm main portion, 211 main portion through hole, 2111 first main portion through hole, 2112 Second main portion through hole, 22 arm support portion, 221 arm bending portion, 2211 bending portion through hole, 222 arm vertical portion, 223 arm connection portion, 2231 arm insertion hole, 23 arm flange portion.

Claims

1. an arm having a plate-shaped arm main portion and a pair of arm support portions provided so as to protrude from both ends of the arm main portion; a light source unit having a base portion provided with a plate-shaped base main portion on one surface of which a light emitting portion is attached, the light source unit being disposed between the pair of arm support portions and attached to the arm such that the other surface of the base main portion faces the arm main portion; a power supply device disposed between the other surface and the power supply device and with a gap provided between the other surface and the power supply device without a heat dissipation member being attached to the other surface; A lighting device comprising:

2. A lighting device as described in claim 1, comprising a power supply holding portion which fixes the power supply unit to the base portion with a gap therebetween.

3. An electric wire electrically connecting the power supply device and the light emitting unit, The lighting device according to claim 2 , wherein the power supply holding portion is formed with an insertion portion through which the electric wire is inserted.

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