Lighting fixtures

Abstract

To propose a luminaire that is fitted to a fitting object part such as an exposed box, and makes wiring work for connecting lead wires and power wires easier than that of a conventional one.SOLUTION: A luminaire comprises an arm to be fitted to a fitting object part, and a light source holding part fitted to the arm, and for holding a light source. The arm comprises a base part to be fitted to the fitting object part, a fitting part extending in a first direction from the base part, and to which the light source holding part is fitted, and a connection part for connecting the base part and the fitting part. A circular hole, and an elongate hole of which one end part communicates with the circular hole, having a width smaller than the diameter of the circular hole, and extending from the circular hole toward the fitting part are formed in the arm. At least a portion of the elongate hole is arranged in the connection part.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a lighting fixture that is placed on a ceiling or the like. [Background technology]

[0002] Conventionally, lighting fixtures that are placed at high places such as ceilings are known (see, for example, Patent Document 1). Such lighting fixtures are attached to a mounting portion such as an exposure box. Moreover, such lighting fixtures include a mounting member that is attached to the mounting portion, and a light source holding portion that is attached to the mounting member and holds a light source. Moreover, such lighting fixtures have a mounting hole that is a through hole formed in the mounting member that is attached to the mounting portion. Then, the lighting fixture is attached to the mounting portion by screwing a bolt inserted into the mounting hole into a female thread formed in the mounting portion. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Utility Model Registration No. 2573820 Summary of the Invention [Problem to be solved by the invention]

[0004] A power line is laid from a power supply source to a mounting portion such as an exposed box on which a lighting fixture is mounted. Then, by connecting the lead wire of the lighting fixture to the power line, power is supplied from the power supply source to the lighting fixture. For this reason, when mounting a lighting fixture to a mounting portion, it is necessary to first connect the lead wire of the lighting fixture to the power line before mounting the lighting fixture to the mounting portion. During this wiring work to connect the lead wire of the lighting fixture to the power line, in a conventional lighting fixture mounted to a mounting portion such as an exposed box, one worker had to hold the lighting fixture and another worker had to perform the wiring work. That is, in a conventional lighting fixture mounted to a mounting portion such as an exposed box, the wiring work to connect the lead wire and the power line had to be performed by multiple workers. For this reason, a problem with conventional lighting fixtures mounted to a mounting portion such as an exposed box is that the wiring work to connect the lead wire and the power line is complicated.

[0005] The present disclosure has been made to solve the above-mentioned problems, and aims to propose a lighting fixture that is attached to a mounting portion such as an exposed box, and that makes the wiring work of connecting the outlet wire and the power line easier than ever before. [Means for solving the problem]

[0006] The lighting device according to the present disclosure includes an arm attached to a mounting portion, and a light source holder attached to the arm and holding a light source, the arm extending in a first direction from the base and having the light source holder attached thereto. A pair The mounting portion, the base portion and the A pair Connect to the mounting part A pair The arm has a circular hole and a connecting portion, one end of which is connected to the circular hole and has a width smaller than the diameter of the circular hole. have A long hole is formed, the long hole extends from the round hole toward only one of the pair of mounting portions, At least a portion of the slot is The connecting portion is connected to one of the pair of connecting portions. is placed at the connection part. Effect of the Invention

[0007] The arm of the lighting fixture according to the present disclosure is formed with a so-called "bell-shaped hole" composed of a round hole and an elongated hole communicating with the round hole. At least a part of the elongated hole of the bell-shaped hole is disposed at the connection part of the arm. Therefore, in the lighting fixture according to the present disclosure, a bolt used for mounting the lighting fixture is mounted on the mounting part, the bolt is passed through the round hole of the bell-shaped hole, and the bolt is inserted into the elongated hole of the bell-shaped hole, so that the head of the bolt is caught around the elongated hole. As a result, the lighting fixture according to the present disclosure is held by the bolt mounted on the mounting part with a space secured between the mounting part and the arm for wiring work to connect the lead wire and the power line. Therefore, in the case of the lighting fixture according to the present disclosure, the wiring work to connect the lead wire and the power line can be performed by one worker. Therefore, the lighting fixture according to the present disclosure makes the wiring work to connect the lead wire and the power line easier than ever before. [Brief description of the drawings]

[0008] [Figure 1] 1 is a perspective view of a lighting fixture according to an embodiment of the present invention; [Diagram 2] FIG. 1 is a side view of a lighting fixture according to an embodiment of the present invention. [Diagram 3] FIG. 2 is an exploded perspective view of the lighting fixture according to the present embodiment. [Figure 4] FIG. 2 is a perspective view showing an arm of the lighting fixture according to the present embodiment. [Diagram 5] FIG. 2 is a plan view showing an arm of the lighting fixture according to the present embodiment. [Figure 6] 1 is a side view of an arm of a lighting fixture according to the present embodiment, observed in a lateral direction X. FIG. [Figure 7] 2 is a side view of the arm of the lighting fixture according to the present embodiment, observed in the lateral direction Y. FIG. [Figure 8] FIG. 7 is a view taken along the arrow A in FIG. 6. [Figure 9] 1 is a bottom view showing an exposure box to which a lighting fixture according to the present embodiment is attached. FIG. [Figure 10]1 is a perspective view showing an exposure box to which a lighting fixture according to an embodiment of the present invention is attached; [Figure 11] 1 is a perspective view for explaining a method of mounting a lighting fixture according to the present embodiment to an exposure box. FIG. [Figure 12] 1 is a perspective view for explaining a method of mounting a lighting fixture according to the present embodiment to an exposure box. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] In the following embodiment, an example of a lighting device according to the present disclosure will be described. Note that in the following embodiment, an example of a lighting device according to the present disclosure will be described while observing the example of a lighting device according to the present disclosure in a position when it is attached to the underside of an attachment portion such as an exposure box. In the following embodiment, the up-down direction is defined as the up-down direction Z. Also, the horizontal direction perpendicular to the up-down direction Z is defined as the horizontal direction X. Also, the horizontal direction perpendicular to the up-down direction Z and the horizontal direction X is defined as the horizontal direction Y. Note that these directions do not limit the lighting device according to the present disclosure.

[0010] Embodiment FIG. 1 is a perspective view of a lighting fixture according to the present embodiment. FIG. 2 is a side view of the lighting fixture according to the present embodiment. FIG. 3 is an exploded perspective view of the lighting fixture according to the present embodiment. FIG. 4 is a perspective view showing an arm of the lighting fixture according to the present embodiment. FIG. 5 is a plan view showing the arm of the lighting fixture according to the present embodiment. FIG. 6 is a side view of the arm of the lighting fixture according to the present embodiment observed in the lateral direction X. FIG. 7 is a side view of the arm of the lighting fixture according to the present embodiment observed in the lateral direction Y. FIG. 8 is a view seen from the arrow A in FIG. 6.

[0011] The lighting fixture 1 includes an arm 100 that is attached to a mounting portion such as an exposure box, and a light source holding portion 210 that is attached to the arm 100. The arm 100 is formed with a mounting hole 111 that is a through hole, and the arm 100 is attached to the mounting portion using the mounting hole 111. The light source holding portion 210 holds the light source 230. The light source 230 does not have to be a component of the lighting fixture 1, but in this embodiment, the light source 230 is a component of the lighting fixture 1 and configures the light source unit 200 together with the light source holding portion 210 as described later. The lighting fixture 1 also includes a bolt 10 that fixes the light source holding portion 210 to the arm 100. That is, the light source holding portion 210 is attached to the arm 100 by the bolt 10.

[0012] The arm 100 includes a base 110 and an attachment portion 120. The base 110 is attached to the attachment portion, and is formed of, for example, a plate-like member. The normal line of the flat surface of the base 110 faces the vertical direction Z. The attachment portion 120 is attached to the light source holding portion 210, and is formed of, for example, a plate-like member. The attachment portion 120 extends in a first direction from the base 110. In this embodiment, the vertical direction Z is the first direction. More specifically, the attachment portion 120 extends downward from an end of the base 110 in the horizontal direction Y. In this embodiment, the arm 100 includes a pair of attachment portions 120. That is, the pair of attachment portions 120 face each other in the horizontal direction Y. The arm 100 is substantially U-shaped.

[0013] Moreover, the arm 100 according to this embodiment includes a connection part 130 that connects the base part 110 and the attachment part 120. In this embodiment, the connection part 130 has a curved surface. This makes it possible to reduce the concentration of stress that occurs in the connection part 130 when the arm 100 vibrates, for example.

[0014] The base 110 of the arm 100 is formed with a mounting hole 111, which is a through hole. A bolt for mounting the base 110 to the mounting part is inserted into the mounting hole 111. Specifically, the base 110 is mounted to the mounting part by screwing the bolt inserted into the mounting hole 111 into the female thread of the mounting part. In this embodiment, the base 110 is formed with four mounting holes 111. Moreover, each mounting hole 111 has an elongated hole shape. Moreover, the elongated hole portion of the potbelly hole 112 is connected to two of the four mounting holes 111. Thereby, when the lighting device 1 is mounted to the mounting part, the head of the bolt screwed into the female thread of the mounting part is passed through the round hole portion of the potbelly hole 112, and the bolt is inserted into the elongated hole portion of the potbelly hole 112, so that the lighting device 1 can be temporarily fixed to the mounting part.

[0015] In addition, the base 110 of the arm 100 according to this embodiment is also formed with a mounting hole 113 into which a hanging bolt is inserted so that the lighting fixture 1 can be attached to a hanging bolt provided on a ceiling or the like. In this embodiment, the base 110 is formed with two mounting holes 113. In addition, the base 110 is formed with a wiring hole 114. The lead wire 214 of the light source holding part 210 is inserted into the wiring hole 114. By connecting the power line connected to the power supply source and the lead wire 214, power is supplied from the power supply source to the light source holding part 210 of the lighting fixture 1. In this embodiment, the wiring hole 114 is circular. Therefore, by inserting the lead wire 214 having a circular cross section into the wiring hole 114, the wiring hole 114 can be blocked by the lead wire 214. As a result, for example, when the mounting part is an exposed box, it is possible to prevent the power line and the like arranged in the exposed box from being exposed to the outside of the exposed box through the wiring hole 114.

[0016] The light source holding part 210 is attached to the lower part of the mounting part 120 of the arm 100. The lower part of the mounting part 120 is formed with a long hole 122 extending in a second direction inclined with respect to the first direction. The second direction inclined with respect to the first direction includes a direction perpendicular to the first direction. In this embodiment, the horizontal direction X perpendicular to the vertical direction Z, which is the first direction, is the second direction. In addition, in this embodiment, in order to form the long hole 122 long, the arm 100 is provided with a convex part 121 protruding in the horizontal direction X at the lower part. The long hole 122 is a portion into which the bolt 10 for mounting the light source holding part 210 to the mounting part 120 is inserted. That is, the bolt 10 inserted into the mounting part 120 is movable between the first end 122a, which is one end of the long hole 122, and the second end 122b, which is the other end of the long hole 122.

[0017] Further, the mounting portion 120 of the arm 100 is formed with a recess 123 recessed from the edge of the elongated hole 122 in a direction away from the base portion 110. This recess 123 is a portion into which the bolt 10 is inserted when the light source holding portion 210 is fixed to the arm 100. In this embodiment, the recess 123 is formed at the second end 122b of the elongated hole 122. Specifically, the bolt 10 inserted into the elongated hole 122 is screwed into a female screw 222 (described later) of the light source holding portion 210. When the arm 100 is mounted to the mounting portion, the bolt 10 is loosened and moved to the first end 122a of the elongated hole 122, and the light source holding portion 210 is retracted. After the arm 100 is mounted to the mounting portion, the bolt 10 is moved to the second end 122b of the elongated hole 122 and inserted into the recess 123. Then, by tightening the bolt 10, the mounting part 120 is sandwiched between the head of the bolt 10 and the light source holding part 210, and the light source holding part 210 is fixed to the arm 100 in a position for use. In this embodiment, the recess 123 is formed inclined with respect to a direction perpendicular to the extension direction of the long hole 122 so that the bolt 10 can be easily inserted from the long hole 122 into the recess 123.

[0018] Further, the mounting portion 120 of the arm 100 is formed with a plurality of markings 124 extending radially from the recess 123. When the bolt 10 is inserted into the recess 123, the light source holding portion 210 is rotatable around the bolt 10 as a rotation center before the bolt 10 is tightened. Therefore, the bolt 10 is tightened after adjusting the angle of the light source holding portion 210 with respect to the arm 100 to an angle when the lighting fixture 1 is used. At this time, by aligning the markings 223 and 124, which will be described later, formed on the light source holding portion 210, the angle of the light source holding portion 210 with respect to the arm 100 can be visually confirmed, and the angle of the light source holding portion 210 with respect to the arm 100 can be easily adjusted.

[0019] The arm 100 is formed with a pot hole 131. The pot hole 131 is composed of a round hole 132 and an elongated hole 133. The round hole 132 is formed in the connection portion 130. The round hole 132 may be formed in the base portion 110. The width W of the elongated hole 133 is smaller than the diameter D of the round hole 132. The elongated hole 133 has a first end 133a, which is one end, communicating with the round hole 132. The elongated hole 133 extends from the round hole 132 toward the attachment portion 120. At least a part of the elongated hole 133 is disposed in the connection portion 130. In the elongated hole 133 according to this embodiment, a second end 133b, which is the end opposite to the first end 133a, which is the end on the round hole 132 side, is disposed in the connection portion 130.

[0020] When attaching the lighting fixture 1 to the mounting portion, it is first necessary to connect the lead wire 214 and the power line before attaching the lighting fixture 1 to the mounting portion. At this time, a bolt used for attaching the lighting fixture 1 is attached to the mounting portion, the bolt is passed through the round hole 132 of the potbelly hole 131, and the bolt is inserted into the elongated hole 133 of the potbelly hole 131, so that the head of the bolt gets caught around the elongated hole 133. As a result, the lighting fixture 1 is held by the bolt attached to the mounting portion, with a space secured between the mounting portion and the arm 100 for wiring work to connect the lead wire 214 and the power line.

[0021] Here, the bolt used to attach the lighting fixture to the exposure box, which is one of the attachment parts, is specified as an M4 bolt in JIS C 8340. An M4 bolt is a bolt with a male thread having a diameter of 4 mm. For this reason, the bolt inserted into the round hole 131 is often an M4 bolt. For this reason, it is preferable that the round hole 131 is a size corresponding to an M4 bolt. When the round hole 131 is a size corresponding to an M4 bolt, the width W of the long hole 133 of the round hole 131 is larger than 4 mm. Furthermore, the width W of the long hole 133 of the round hole 131 is smaller than the diameter of the head of the M4 bolt. In this embodiment, the width W of the long hole 133 of the round hole 131 is 4.5 mm. Furthermore, when the round hole 131 is a size corresponding to an M4 bolt, the diameter D of the round hole 132 of the round hole 131 is larger than the diameter of the head of the M4 bolt. Note that M4 bolts have heads of various shapes. Therefore, the diameter of the head of an M4 bolt is not uniquely determined. In this embodiment, the diameter D of the round hole 132 is set to 10 mm to prevent the strength of the connection part 130 from decreasing due to the round hole 132 becoming too large.

[0022] In this embodiment, the pot hole 131 is formed in only one of the two connection parts 130. However, the present invention is not limited to this, and pot holes 131 may be formed in both of the two connection parts 130. In this case, the pot holes 131 may be sized to correspond to bolts of different sizes.

[0023] The arm 100 also includes a flange 101 connected to the base 110, the connection portion 130, and the attachment portion 120. In this embodiment, the arm 100 includes the flange 101 on both sides of the end portion on the lateral direction X side. By providing the flange 101, the rigidity of the arm 100 is improved. In particular, when the pot hole 131 is formed, the rigidity of the connection portion 130 decreases. For this reason, when the pot hole 131 is formed, it is particularly useful to provide the flange 101. Furthermore, by providing the flange 101, it is possible to suppress twisting of the arm 100 when a torsional load acts on the arm 100. It is sufficient that the flange 101 is connected to a part of the attachment portion 120.

[0024] The light source unit 200 includes a light source 230 , a cover 201 that covers the light source 230 , and a light source holder 210 that holds the light source 230 .

[0025] The light source 230 according to this embodiment uses a light emitting element. The light source 230 includes a substrate 231 and a plurality of light emitting elements 232 mounted on the substrate 231. The cover 201 includes a main portion 202 and a flange portion 203. The main portion 202 covers the light source 230 from below, and is formed of, for example, a material having diffusivity. The flange portion 203 protrudes laterally from the outer periphery of the main portion 202 toward the outside of the main portion 202. The flange portion 203 is fixed to, for example, a base 212 of a heat sink 211 described later.

[0026] The light source holding portion 210 includes a heat sink 211 , a top plate 215 , a column portion 220 , and an output wire 214 .

[0027] The heat sink 211 dissipates heat generated from the light source 230, and includes a base 212 and a plurality of fins 213. The base 212 is a plate-like member, and a substrate 231 of the light source 230 is provided on the lower surface of the base 212. The plurality of fins 213 are provided on the upper surface of the base 212. In this embodiment, the base 212 and the fins 213 are integrally formed by pressing an aluminum plate. Note that if the heat generated from the light source 230 can be sufficiently dissipated by the base 212 alone, the fins 213 do not need to be provided.

[0028] The top plate 215 is a plate-like member and is disposed above the heat sink 211. The top plate 215 prevents the fins 213 of the heat sink 211 from coming into contact with objects around the lighting device 1. The top plate 215 also prevents dust from adhering to the heat sink 211 and the light source 230. The top plate 215 is connected to a plurality of pillars 220, which are components that ensure the rigidity of the light source holding unit 210. That is, the top plate 215 is a component that connects the plurality of pillars 220, which are components that ensure the rigidity of the light source holding unit 210. For this reason, the top plate 215 also contributes to ensuring the rigidity of the light source holding unit 210. Note that some conventional lighting devices have a power source provided between the top plate 215 and the arm 100. In the lighting device 1 according to the present embodiment, a power source may also be provided between the top plate 215 and the arm 100.

[0029] As described above, the pillar portion 220 is a component that ensures the rigidity of the light source holding portion 210. The pillar portion 220 is formed of a highly rigid material such as iron or stainless steel. The pillar portion 220 includes a main portion 221, a pair of side portions 224, an upper surface portion 225, a lower surface portion 226, and a holding portion 227.

[0030] The main part 221 has a rectangular shape, and is disposed at a position facing the lower part of the mounting part 120 of the arm 100. The main part 221 is formed with a female screw 222 into which the bolt 10 is screwed. In this embodiment, a through hole is formed in a plate-like part constituting the main part 221, and a nut disposed at a position facing the through hole is attached to the plate-like part, thereby forming the female screw 222 in the main part 221. In addition, the main part 221 is also formed with an engraving 223 used when adjusting the angle of the light source holding part 210 with respect to the arm 100.

[0031] The pair of side portions 224 protrude from the lateral ends of the main portion 221 toward the inside of the light source holding portion 210. The pair of side portions 224 function to suppress twisting of the column portion 220. The pair of side portions 224 are also provided around the outer periphery of the base 212 of the heat sink 211. Therefore, when the main portion 221 attempts to move due to shaking of the lighting fixture 1, the pair of side portions 224 come into contact with the base 212 of the heat sink 211, suppressing the movement of the main portion 221.

[0032] The upper surface portion 225 protrudes from an upper end portion of the main portion 221 toward the inside of the light source holding portion 210. The top plate 215 is fixed to the upper surface portion 225 by a fixing means such as a screw. The lower surface portion 226 protrudes from a lower end portion of the main portion 221 toward the inside of the light source holding portion 210. The base 212 of the heat sink 211 is fixed to the lower surface portion 226 by a fixing means such as a screw. The holding portion 227 is formed in a substantially L-shape, and protrudes from the lower end portion of the main portion 221 to below the lower surface portion 226. A lower portion of the holding portion 227 is disposed below the flange portion 203 of the cover 201, and prevents the cover 201 from falling off.

[0033] The lead wire 214 is an electric wire that supplies power from a power supply source to the light source 230. One end of the lead wire 214 is connected to the light source 230. The other end of the lead wire 214 is connected to a power line that is routed from the power supply source to the attachment portion.

[0034] In the lighting fixture 1 configured in this manner, by tightening the bolt 10 screwed into the female screw 222 of the column part 220 of the light source holding part 210, the mounting part 120 of the arm 100 is sandwiched between the main part 221 of the column part 220 and the head part of the bolt 10, and the light source holding part 210 is fixed to the arm 100. In addition, by loosening the bolt 10 screwed into the female screw 222 of the column part 220 of the light source holding part 210, the bolt 10 becomes movable in the long hole 122 of the mounting part 120 of the arm 100. As a result, the light source holding part 210 becomes movable in the second direction, which is the direction in which the long hole 122 extends. Specifically, in this embodiment, the light source holding part 210 becomes movable in the lateral direction X. In addition, by loosening the bolt 10 screwed into the female screw 222 of the column part 220 of the light source holding part 210, the light source holding part 210 becomes rotatable around the bolt 10 as the center of rotation.

[0035] Therefore, when the arm 100 is fixed to the mounting portion with a bolt, the light source holding portion 210 is moved toward the first end portion 122a of the long hole 122 and rotated at that position, so that the light source holding portion 210 is retracted from below the mounting hole 111 of the arm 100. Therefore, the lighting device 1 according to the present embodiment can prevent a tool such as an electric drill from interfering with the light source holding portion 210 when the arm 100 is fixed to the mounting portion with a bolt. Here, in the conventional lighting device, in order to prevent a tool such as an electric drill from interfering with the light source holding portion, it is necessary to increase the interval between the mounting member such as an arm attached to the mounting portion and the light source holding portion, and the lighting device is enlarged. On the other hand, the lighting device 1 according to the present embodiment can prevent a tool such as an electric drill from interfering with the light source holding portion 210 while preventing the lighting device 1 from becoming larger in size by retracting the light source holding portion 210 as described above.

[0036] Next, a method for attaching lighting fixture 1 to exposure box 1000, which is one of the attachment targets, will be described. Note that, in the following, first, the configuration of exposure box 1000 will be described. Then, after that, a method for attaching lighting fixture 1 to exposure box 1000 will be described.

[0037] Fig. 9 is a bottom view showing an exposure box to which a lighting fixture according to the present embodiment is attached, and Fig. 10 is a perspective view showing an exposure box to which a lighting fixture according to the present embodiment is attached. The exposure box 1000 is attached to a ceiling or the like. A plurality of M4 female threads 1001 are formed on the bottom surface of the exposure box 1000. M4 bolts 1020 are screwed into the female threads 1001. That is, the male thread portion 1021 of the bolt 1020 is an M4 male thread. The exposure box 1000 is also formed with a storage portion 1002 that opens downward. The storage portion 1002 stores a connection portion between the power line 1011 and the output wire 214 of the lighting fixture 1.

[0038] A wiring conduit 1010 is connected to the exposed box 1000. The wiring conduit 1010 houses a power line 1011 that is routed from a power supply source (not shown) to the exposed box 1000. An end of the power line 1011 housed in the wiring conduit 1010 is exposed from the exposed box 1000.

[0039] The lighting fixture 1 is attached to the exposure box 1000 configured in this manner as follows.

[0040] 11 and 12 are perspective views for explaining a method of mounting the lighting fixture according to the present embodiment to an exposure box. When attaching the lighting fixture 1 to the exposure box 1000, first, a wiring operation is performed to connect the power line 1011 and the output wire 214 of the lighting fixture 1. This wiring operation is performed as shown in Fig. 11. Specifically, first, a bolt 1020 is screwed into one of the female threads 1001 of the exposure box 1000. Then, a head 1022 of this bolt 1020 is passed through a round hole 132 of a potbelly hole 131 formed in the arm 100. Then, the arm 100 is moved, and the bolt 1020 is inserted into an elongated hole 133 of the potbelly hole 131.

[0041] As a result, as shown in FIG. 11, head 1022 of bolt 1020 is caught around elongated hole 133 of pot hole 131. Then, lighting fixture 1 tilts due to its own weight. As a result, lighting fixture 1 is held by bolt 1020 in a state where a space is secured between exposure box 1000 and arm 100 for wiring work to connect lead wire 214 and power line 1011. Therefore, in lighting fixture 1 according to the present embodiment, wiring work to connect lead wire 214 and power line 1011 can be performed by one worker. Therefore, in lighting fixture 1 according to the present embodiment, wiring work to connect lead wire 214 and power line 1011 is easier than in the past. In this embodiment, M4 bolt 1020 is caught around elongated hole 133 of pot hole 131, and wiring work to connect lead wire 214 and power line 1011 is performed. However, M4 bolt 1020 is one example of a bolt that can be hooked around elongated hole 133 of pot hole 131. When a bolt other than M4 is screwed into a mounting portion such as exposed box 1000, the bolt other than M4 may be hooked around elongated hole 133 of pot hole 131 to connect lead wire 214 and power wire 1011.

[0042] Here, as described above, in the oblong hole 133 according to the present embodiment, the second end 133b, which is the end opposite to the first end 133a, which is the end on the round hole 132 side, is disposed in the connection portion 130. When the oblong hole 133 extends to the mounting portion 120 and the second end 133b is disposed in the mounting portion 120, the head 1022 of the bolt 1020 may get caught around the portion of the oblong hole 133 formed in the mounting portion 120. In this case, the inclination of the lighting fixture 1 becomes larger than the state shown in FIG. 11. Therefore, when the length of the power line 1011 that can be drawn out from the exposure box 1000 is short, it becomes slightly difficult to connect the lead wire 214 and the power line 1011. On the other hand, when the second end 133b of the oblong hole 133 is disposed in the connection portion 130, when the head 1022 of the bolt 1020 gets caught around the oblong hole 133, the inclination of the lighting fixture 1 does not become too large. Therefore, when the second end 133b of the elongated hole 133 is disposed at the connection portion 130, the wiring work for connecting the output wire 214 and the power wire 1011 becomes easier.

[0043] After connecting lead wire 214 and power line 1011, the connection portion between lead wire 214 and power line 1011 is stored in storage portion 1002 of exposure box 1000. Then, as shown in Fig. 12, bolts 1020 inserted into each mounting hole 111 of arm 100 are screwed into female threads 1001 of exposure box 1000, thereby fixing arm 1000 to exposure box 1000. Thus, lighting fixture 1 is attached to exposure box 1000.

[0044] As described above, the lighting device 1 according to the present embodiment includes the arm 100 attached to the attachment portion, and the light source holding portion 210 attached to the arm 100 and holding the light source 230. The arm 100 includes the base 110 attached to the attachment portion, the attachment portion 120 extending in a first direction from the base 110 and to which the light source holding portion 210 is attached, and the connection portion 130 connecting the base 110 and the attachment portion 120. The arm 100 is formed with a round hole 132 and an elongated hole 133 having a first end 133a, which is one end, communicating with the round hole 132 and having a width W smaller than a diameter D of the round hole 132 and extending from the round hole 132 toward the attachment portion 120. At least a part of the elongated hole 133 is disposed in the connection portion 130.

[0045] In the lighting fixture 1 configured in this manner, a bolt used for mounting the lighting fixture 1 is mounted on the mounting portion, the bolt is passed through the round hole 132, and the bolt is inserted into the elongated hole 133, so that the head of the bolt is caught around the elongated hole 133. As a result, the lighting fixture 1 according to the present embodiment is held by the bolt mounted on the mounting portion, with a space secured between the mounting portion and the arm 100 for wiring work to connect the lead wire 214 and the power line. Therefore, in the lighting fixture 1 according to the present embodiment, the wiring work to connect the lead wire 214 and the power line can be performed by one worker. Therefore, in the lighting fixture 1 according to the present embodiment, the wiring work to connect the lead wire 214 and the power line is easier than in the past. [Explanation of symbols]

[0046] 1 lighting fixture, 10 bolt, 100 arm, 101 flange, 110 base, 111 mounting hole, 112 grommet hole, 113 mounting hole, 114 wiring hole, 120 mounting portion, 121 convex portion, 122 long hole, 122a first end, 122b second end, 123 recess, 124 engraving, 130 connection portion, 131 grommet hole, 132 round hole, 133 long hole, 133a first end, 133b second end, 200 light source unit, 201 cover, 202 main portion, 203 flange portion, 210 light source holding portion, 211 heat sink, 212 base, 213 fin, 214 lead wire, 215 top plate, 220 column portion, 221 main portion, 222 Female screw, 223 engraving, 224 side portion, 225 upper surface portion, 226 lower surface portion, 227 holding portion, 230 light source, 231 board, 232 light-emitting element, 1000 exposure box, 1001 female screw, 1002 storage portion, 1010 wiring tube, 1011 power line, 1020 bolt, 1021 male screw portion, 1022 head.

Claims

1. An arm attached to the attachment portion; a light source holder attached to the arm and holding a light source; Equipped with The arm is A base portion attached to the mounting portion; a pair of mounting portions extending in a first direction from the base portion and to which the light source holding portion is attached; A pair of connection portions that connect the base portion and the pair of mounting portions; Equipped with The arm is formed with a circular hole and an elongated hole having one end communicating with the circular hole and a width smaller than a diameter of the circular hole, the long hole extends from the round hole toward only one of the pair of mounting portions, A lighting fixture in which at least a portion of the long hole is disposed in a connection portion that is connected to the mounting portion of one of the pair of connection portions.

2. The lighting device according to claim 1 , wherein an end portion of the oblong hole opposite to the end portion on the round hole side is disposed at the connection portion.

3. The lighting fixture according to claim 1 or 2, wherein the connection portion has a curved surface.

4. The lighting fixture according to any one of claims 1 to 3, wherein the arm includes a flange connected to the base portion, the connection portion, and the mounting portion.

5. The width of the oblong hole is greater than 4 mm and smaller than the diameter of the head of a bolt having a male thread of 4 mm in diameter, The lighting device according to any one of claims 1 to 4, wherein the diameter of the circular hole is larger than the diameter of the head.

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