Lighting tool

Abstract

To provide a lighting tool which can suppress an excessive projection of the lighting tool from a surface on which a rail part is attached.SOLUTION: A lighting tool 1 includes a base member 13, a light source 7, a power source 15, a plug part 100, and a storage part 21. The base member 13 includes a first main face B1 and a second main face B2 opposite to the first main face B1. The light source 7 is provided on the first main face B1 and emits light. The power source 15 supplies power to the light source 7 based on an external power of an external power source. The plug part 100 supplies the external power to the power source 15 by being connected to a rail part R. The storage part 21 stores the power source 15 and a specification part SP of the plug part 100. The power source 15 faces the second main face B2. The specification part SP faces the second main face B2 at a position different from a position of the second main face B2 at which the power source 15 faces, and overlaps with the first main face B1 in a direction crossing with the base member 13 at a position of the first main face B1 at which the light source 7 is arranged.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a lighting fixture. [Background technology]

[0002] The lighting device described in Patent Document 1 includes an illumination section, a lighting unit section, a housing, and a power plug. The illumination section includes LED elements arranged along a first direction. The lighting unit includes a power circuit for lighting the LED elements. The housing accommodates the LED elements and the power circuit. The illumination section and the lighting unit section are arranged along the first direction. The power plug is detachably attached to the duct rail and receives power from the duct rail. The power plug is located on the back side of the power circuit. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-73555 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the lighting device described in Patent Document 1, the power plug and the power circuit overlap, so when the lighting device is attached to a rail section such as a duct rail, the lighting device protrudes excessively from the surface on which the rail section is attached.

[0005] The present invention has been made in consideration of the above problems, and has an object to provide a lighting fixture that can prevent the lighting fixture from protruding excessively from the surface to which the rail portion is attached. [Means for solving the problem]

[0006] The lighting device according to the present invention has a first main surface and a second main surface opposite to the first main surface, and includes an elongated base member extending in a first direction, a light source unit arranged on the first main surface and emitting light, a power supply unit supplying power to the light source unit based on external power from an external power supply, a plug unit supplying the external power to the power supply unit by being connected to a rail unit, and a housing unit extending in the first direction and housing the power supply unit and a specific portion of the plug unit, the power supply unit facing the second main surface, and the specific portion being disposed at a position of the second main surface different from the position to which the power supply unit faces. the accommodating portion faces the second main surface at a position where the light source portion is disposed and overlaps the first main surface in a direction intersecting the base member at a position on the first main surface where the light source portion is disposed, the accommodating portion has a first wall facing the rail portion, a second wall extending from the first wall in a direction toward the base member, and a through portion in which a through hole penetrating the inside of the accommodating portion and the outside of the accommodating portion is provided from a part of the first wall to a part of the second wall, the through portion being provided at a position spaced from an end of the accommodating portion in the first direction, and the plug portion is disposed in the through portion. Effect of the Invention

[0007] According to the lighting fixture of the present invention, it is possible to prevent the lighting fixture from protruding excessively from the surface to which the rail portion is attached. [Brief description of the drawings]

[0008] [Figure 1] 1 is a perspective view showing a lighting fixture according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is a diagram showing a first unit and a second unit of the lighting device according to the first embodiment. [Diagram 3] A view of the second unit from the ceiling side. [Figure 4] 4 is a cross-sectional view showing the IV-IV section of the lighting fixture 1 shown in FIG. 3. [Diagram 5] 5 is an enlarged view of a portion of the lighting device 1 shown in FIG. 4. FIG. [Figure 6] 1 is a schematic cross-sectional view of a lighting device according to a first embodiment. [Figure 7]FIG. 2 is an enlarged view of a plug portion of the lighting fixture according to the first embodiment. [Figure 8] 4 is another enlarged view of the plug portion of the lighting fixture according to the first embodiment. FIG. [Figure 9] FIG. 4 is a view of the plug portion as viewed from the second main surface side. [Figure 10] FIG. 2 is an exploded perspective view of a plug portion according to the first embodiment. [Figure 11] FIG. 11 is a perspective view showing a lighting fixture according to a second embodiment of the present invention. [Figure 12] FIG. 11 is a view of the lighting fixture of the second embodiment as seen from the rail side. [Figure 13] 13 is a cross-sectional view taken along the line XII-XII of the lighting fixture 1 shown in FIG. [Figure 14] FIG. 11 is a diagram showing the plug portion in the first state of the second embodiment. [Figure 15] FIG. 11 is a perspective view showing a lighting fixture according to a third embodiment. [Figure 16] FIG. 11 is an exploded perspective view of a lighting fixture according to a third embodiment. [Figure 17] FIG. 11 is a schematic cross-sectional view of a lighting device according to a third embodiment. [Figure 18] 11 is an enlarged view showing a part of a second unit of a lighting fixture according to a third embodiment. FIG. [Figure 19] 19 is a view of the second unit of the third embodiment shown in FIG. 18 as viewed from the ceiling surface side. [Figure 20] 19 is a diagram showing a cross section taken along the line XX-XX of the lighting fixture of the third embodiment shown in FIG. 18. [Figure 21] 13 is a diagram showing a plug portion, a first light-shielding portion, and a second light-shielding portion of a third embodiment. FIG. [Figure 22] FIG. 11 is an exploded perspective view showing a plug portion, a first light-shielding portion, and a second light-shielding portion of a third embodiment. [Figure 23] 1A is an enlarged view of a first light-shielding portion, and FIG. 1B is an enlarged view of a second light-shielding portion. [Figure 24] 20 is a cross-sectional view taken along the line XXIV-XXIV of the lighting fixture shown in FIG. 19. [Diagram 25]FIG. 2 shows a rail portion having a finisher. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference characters and the description will not be repeated. In the embodiment of the present invention, the X-axis, the Y-axis, and the Z-axis are mutually perpendicular, the X-axis and the Y-axis are parallel to the horizontal plane, and the Z-axis is parallel to the vertical line.

[0010] [Embodiment 1] A lighting fixture 1 according to an embodiment of the present invention will be described with reference to Fig. 1. Fig. 1 is a perspective view showing the lighting fixture 1 according to the first embodiment of the present invention. As shown in Fig. 1, the lighting fixture 1 is attached to a rail portion R. The lighting fixture 1 emits light. The lighting fixture 1 extends along a first direction PD1. The first direction PD1 is the direction in which the rail portion R extends. The lighting fixture 1 includes a first unit U1 and a second unit U2.

[0011] The first unit U1 emits light and functions as a light source unit. The first unit U1 is attached to the second unit U2. The first unit U1 extends along a first direction PD1. The first unit U1 has a rectangular shape.

[0012] The second unit U2 extends along the first direction PD1. The second unit U2 is attached to the rail portion R. The second unit U2 has a rectangular shape.

[0013] The rail portion R transmits external power from an external power source to the lighting fixture 1. The rail portion R is long and includes a pair of transmission portions R1 (see FIG. 24), a pair of recesses R2 (see FIG. 24), and an opening R3. The pair of transmission portions R1 (see FIG. 24), the pair of recesses R2 (see FIG. 24), and the opening R3 each extend along the longitudinal direction of the rail portion R. A power supply voltage for supplying power to the first unit U1 and the second unit U2 is applied to the pair of transmission portions R1 (see FIG. 24). The rail portion R is attached to an attachment portion in a structure such as a building. The attachment portion is, for example, a ceiling surface (ceiling surface) of a room in the building. The rail portion R may be embedded in the ceiling, not limited to being attached to the ceiling surface. Specifically, the rail portion R is embedded in the ceiling by attaching the rail portion R to a recess formed in the ceiling.

[0014] Next, the first unit U1 and the second unit U2 will be described in detail with reference to Figures 1 to 3. Figure 2 is a diagram showing the first unit U1 and the second unit U2. Figure 3 is a diagram showing the first unit U1 as viewed from the ceiling surface side.

[0015] As shown in FIG. 1, the first unit U1 has a cover member 3 and a pair of first closing members 5.

[0016] The cover member 3 extends along the first direction PD1. The inside of the cover member 3 is hollow. The cover member 3 is made of, for example, a synthetic resin. The cover member 3 diffuses light. The cover member 3 is, for example, white and semi-transparent. The cover member 3 may be formed, for example, by molding a resin containing a light diffusion material, or may be formed by molding a transparent material and then performing a light diffusion treatment on the surface.

[0017] The pair of first closing members 5 are fixed to a pair of longitudinal end portions of the cover member 3, respectively. For example, the first closing members 5 are joined to the longitudinal end portions of the cover member 3 by an adhesive. The pair of first closing members 5 then close a pair of longitudinal open ends 4 of the cover member 3, respectively. The pair of first closing members 5 may be integrally molded with the cover member 3.

[0018] As shown in FIG. 1, the second unit U2 includes a storage portion 21 and a pair of second closing members 23.

[0019] The housing portion 21 extends along the first direction PD1. The housing portion 21 is made of, for example, metal. The inside of the housing portion 21 is hollow. The housing portion 21 houses each component of the lighting device 1. The housing portion 21 has a through portion 203.

[0020] As shown in FIGS. 2 and 3, the through portion 203 passes through the inside of the housing portion 21 and the outside of the housing portion 21.

[0021] The pair of second closing members 23 are respectively fixed to a pair of longitudinal end portions of the storage portion 21. The pair of second closing members 23 respectively close a pair of longitudinal open ends 24 of the storage portion 21. The pair of second closing members 23 may be integrally molded with the storage portion 21.

[0022] In this embodiment, the shape of the second unit U2, the shape of the first unit U1, and the shape of the rail portion R are substantially the same. For example, when the shape of the first unit U1 is rectangular, the shape of the second unit U2 is rectangular. The rail portion R is also rectangular. The first unit U1 and the second unit U2 extend along the first direction PD1, and the rail portion R also extends along the first direction PD1. Furthermore, the length of the first unit U1 in the second direction PD2, the length of the second unit U2 in the second direction PD2, and the length of the rail portion R in the second direction PD2 are substantially the same. The second direction PD2 is a direction perpendicular to the first direction PD1. Therefore, the shapes of the first unit U1, the second unit U2, and the rail portion R are unified. Furthermore, the extension direction of the first unit U1, the extension direction of the second unit U2, and the extension direction of the rail portion R are unified. Furthermore, the length of the first unit U1, the length of the second unit U2, and the length of the rail portion R in the second direction PD2 are unified. That is, when the lighting device 1 is attached to the rail portion R, the lighting device 1 and the rail portion R are more integrated with each other. As a result, the sense of incongruity felt by the user when the lighting device 1 is attached to the rail portion R can be reduced.

[0023] Next, the first unit U1 and the second unit U2 will be described in more detail with reference to FIGS.

[0024] Fig. 4 is a cross-sectional view showing a cross section of the lighting device 1 shown in Fig. 3 taken along line IV-IV. Fig. 5 is an enlarged view of a portion of the lighting device 1 shown in Fig. 4. Fig. 6 is a schematic cross-sectional view of the lighting device 1. As shown in Figs. 4 and 6, the first unit U1 includes a light source unit 7, a base member 13, a power supply unit 15, and an attachment member 19.

[0025] 4, the mounting member 19 mounts the first unit U1 to the second unit U2. Specifically, the mounting member 19 mounts the first unit U1 to the first wall 201 of the storage section 21. For example, the mounting member 19 is made of metal (for example, stainless steel). The first unit U1 may have a plurality of mounting members 19. The plurality of mounting members 19 are attached to the first wall 201 of the second unit U2 at intervals from each other.

[0026] The light source unit 7 extends along the first direction PD1 and emits light. The light source unit 7 is, for example, an LED (Light Emitting Diode) module. Specifically, the light source unit 7 includes a substrate 9 and a plurality of light emitting elements 11. The light source unit 7 is covered by a cover member 3. That is, the light emitted by the light source unit 7 is diffused by the cover member 3.

[0027] As shown in FIG. 5, the substrate 9 has a mounting surface A1 and an opposing surface A2 opposing the mounting surface A1, and extends along a first direction PD1. A plurality of light-emitting elements 11 are mounted on the mounting surface A1 of the substrate 9. The plurality of light-emitting elements 11 are arranged, for example, in a straight line. Each of the light-emitting elements 11 emits light and is, for example, an LED. The plurality of light-emitting elements 11 face the inner surface of the cover member 3 and emit light toward the inner surface of the cover member 3. As a result, the light is emitted to the outside of the lighting device 1 through the cover member 3. Note that a single light-emitting element 11 may be provided.

[0028] The base member 13 dissipates heat generated by the light emission of the light source unit 7. The base member 13 is, for example, a heat sink. The base member 13 is substantially elongated and extends along the first direction PD1. The base member 13 is, for example, made of metal (for example, aluminum). The light source unit 7 is attached to the base member 13. The cover member 3 is fixed to the base member 13.

[0029] 5, the base member 13 has a first main surface B1 and a second main surface B2 that face each other. In other words, the base member 13 has a substantially flat first main surface B1 and a second main surface B2 that faces the first main surface B1. The light source unit 7 is attached to the base member 13 so that the first main surface B1 faces the facing surface A2 of the substrate 9.

[0030] As shown in Fig. 4 and Fig. 6, the power supply unit 15 supplies power to the light source unit 7 via a power line (not shown). Specifically, the power supply unit 15 supplies power to the light source unit 7 based on external power from an external power supply. The power supply unit 15 faces the second main surface B2. As shown in Fig. 6, the power supply unit 15 is disposed between the plug units 100.

[0031] As shown in FIGS. 2 to 4, the accommodation section 21 of the second unit U2 extends along a first direction PD1 in which the base member 13 extends. The accommodation section 21 of the second unit U2 further includes a first wall 201 and a second wall 202. The first wall 201 faces the rail portion R. The second wall 202 extends in a direction from the first wall 201 toward the first unit U1. Specifically, the second wall 202 extends in a direction from the first wall 201 toward the base member 13.

[0032] The second unit U2 further includes a plug section 100 and a light-shielding cover 204.

[0033] 6 is connected to the rail portion R to supply external power to the power supply unit 15. The plug portion 100 that supplies external power to the power supply unit 15 has a connecting portion 120 and a conductive portion 160.

[0034] The connecting portion 120 is connected to the rail portion R. Specifically, the second unit U2 is attached to the rail portion R by connecting the connecting portion 120 to the rail portion R. More specifically, the lighting device 1 is attached to the rail portion R by connecting the connecting portion 120 to the rail portion R. In addition, the connecting portion 120 of the plug portion 100 that supplies external power to the power supply unit 15 can relay the external power to the conductive portion 160 by connecting to the rail portion R.

[0035] The conductive portion 160 transmits external power to the power supply portion 15. Specifically, the conductive portion 160 transmits the external power relayed by the coupling portion 120 to the power supply portion 15. The conductive portion 160 corresponds to an example of a “specific portion” of the plug portion 100.

[0036] The light-shielding cover 204 prevents light from leaking out of the housing section 21 from the through-hole 203. The light-shielding cover 204 is disposed at a position corresponding to the through-hole 203. The size of the light-shielding cover 204 is larger than the through-hole 203, and the light-shielding cover 204 is disposed so as to cover the through-hole 203.

[0037] 6 does not supply external power to the power supply unit 15 even when connected to the rail portion R. Therefore, the other plug portion 100 connects the second unit U2 to the rail portion R. The number of plug portions 100 is not limited to two. That is, the lighting device 1 may have two or more plug portions 100. For example, the lighting device 1 may have three plug portions 100.

[0038] The accommodation portion 21 of the second unit U2 accommodates the base member 13, the power supply unit 15, the mounting member 19, and the conductive portion 160 of the first unit U1. The accommodation portion 21 may further accommodate the light source unit 7.

[0039] Next, the plug portion 100 will be described in detail with reference to Fig. 1 to Fig. 6. As shown in Fig. 4 and Fig. 5, a part of the plug portion 100 is exposed, and the specific portion SP of the plug portion 100 is accommodated in the accommodation portion 21. The conductive portion 160 faces the second main surface B2 at a position different from the position of the second main surface B2 where the power supply unit 15 faces. Furthermore, the specific portion SP is separated from the first main surface B1, and overlaps with the first main surface B1 in a third direction PD3 that intersects with the base member 13 at a position of the first main surface B1 where the light source unit 7 is arranged.

[0040] Therefore, the plug portion 100 and the power supply portion 15 can be disposed at different positions on the second main surface B2. In other words, the plug portion 100 and the power supply portion 15 do not overlap in the third direction PD3. Therefore, the plug portion 100 and the power supply portion 15 do not overlap, and the vertical thickness of the lighting device 1 does not increase. As a result, when the lighting device 1 is attached to the rail portion R, it is possible to prevent the lighting device 1 from excessively protruding from the surface to which the rail portion R is attached.

[0041] 1, 4 to 6, and 24, of the connecting portion 120 and the conductive portion 160, the accommodating portion 21 accommodates the conductive portion 160. Therefore, the connecting portion 120 can be exposed to the outside of the accommodating portion 21. As a result, when the lighting device 1 is connected to the rail portion R, almost the entirety of the connecting portion 120 is accommodated inside the rail portion R, and the lighting device 1 can be disposed in a position close to the rail portion R.

[0042] In addition, since the conductive portion 160 of the plug portion 100 is accommodated in the accommodation portion 21, the entire plug portion 100 does not protrude from the second unit U2. Therefore, the gap between the lighting fixture 1 and the rail portion R when the lighting fixture 1 is attached to the rail portion R can be reduced. As a result, the gap between the lighting fixture 1 and the rail portion R is reduced, and the deterioration of the aesthetic appearance due to the gap can be suppressed. Furthermore, as shown in FIG. 1, the reduction in the gap between the lighting fixture 1 and the rail portion R can enhance the unity of the lighting fixture 1 and the rail portion R in appearance. Specifically, the reduction in the gap between the lighting fixture 1 and the rail portion R makes the second wall 202 and the side surface R4 of the rail portion R shown in FIG. 1 appear to be composed of a continuous surface, and therefore the unity of the lighting fixture 1 and the rail portion R in appearance can be enhanced.

[0043] Furthermore, by reducing the gap between the lighting fixture 1 and the rail portion R, it is possible to suppress accumulation of dust on the first wall 201 of the lighting fixture 1. As a result, the effort required for cleaning the lighting fixture 1 can be reduced.

[0044] Furthermore, by reducing the gap between the lighting fixture 1 and the rail portion R, the lighting fixture 1 does not swing significantly relative to the rail portion R. Therefore, the load on the plug portion 100 can be reduced by the lighting fixture 1 swinging relative to the rail portion R. As a result, damage to the plug portion 100 can be suppressed. For example, when a building shakes due to an earthquake, the ceiling surface also shakes. Then, the rail portion R attached to the ceiling surface shakes. In other words, the vibration is transmitted to the lighting fixture. However, in the plug portion 100 of this embodiment, the lighting fixture 1 does not swing significantly relative to the rail portion R, so the load on the plug portion 100 is small. Therefore, damage to the plug portion 100 can be suppressed.

[0045] Furthermore, the plug unit 100 and the power supply unit 15 are disposed between the first wall 201 and the second main surface B2. In other words, since the plug unit 100, the power supply unit 15, and the first wall 201 are disposed on the second main surface B2 side, the plug unit 100 and the power supply unit 15 do not protrude toward the light emitting surface side of the light source unit 7. Therefore, the plug unit 100 and the power supply unit 15 do not protrude toward the cover member 3 side. Therefore, it is possible to prevent the space for arranging the light source unit 7 from becoming small due to the plug unit 100 and the power supply unit 15. As a result, the degree of freedom in arranging the light source unit 7 on the first main surface B1 side is improved.

[0046] Furthermore, since the plug unit 100 and the power supply unit 15 are disposed on the second main surface B2 side, the light emitted by the light source unit 7 is not blocked by the plug unit 100 and the power supply unit 15. As a result, the light emission efficiency of the light source unit 7 can be improved.

[0047] Next, the plug portion 100 will be described in more detail with reference to Figures 7 and 8. Figure 7 is an enlarged view of the plug portion 100. Figure 8 is another enlarged view of the plug portion 100.

[0048] As shown in Figures 7 and 8, the plug portion 100 further includes a switching portion 130. The switching portion 130 switches the connection state of the coupling portion 120 with respect to the rail portion R. The connection state includes a first state and a second state. The first state indicates a state in which the rail portion R and the coupling portion 120 are not connected. The second state indicates a state in which the rail portion R and the coupling portion 120 are connected.

[0049] Moreover, the plug unit 100 is disposed in the through-hole 203. The through-hole 203 in which the plug unit 100 is disposed penetrates the inside of the storage unit 21 and the outside of the storage unit 21 from a part of the first wall 201 to a part of the second wall 202. Specifically, the connecting unit 120 is disposed in the through-hole 203 and is located on the side of the first wall 201. And the switching unit 130 is disposed in the through-hole 203 and is located on the side of the second wall 202. That is, the connecting unit 120 is disposed on the first wall 201 facing the rail unit R, and the switching unit 130 is disposed on the side of the second wall 202 not facing the rail unit R. Therefore, the switching unit 130 can be operated even in a state where the lighting device 1 is attached to the rail unit R. As a result, the convenience of operating the switching unit 130 is improved.

[0050] Moreover, the switching unit 130 is rotatable about the rotation axis AX. Specifically, the switching unit 130 rotates in a first rotation direction RA about the rotation axis AX. The first rotation direction RA indicates the rotation direction when the connecting unit 120 changes from the second state to the first state. Moreover, the switching unit 130 rotates in a second rotation direction RB about the rotation axis AX. The second rotation direction RB indicates the rotation direction when the connecting unit 120 changes from the first state to the second state.

[0051] When the connection state of the rail portion R is switched from the second state to the first state, the switching unit 130 protrudes from the through-hole 203 as shown in FIG. 7. When the connection state of the rail portion R is switched from the first state to the second state, the switching unit 130 is accommodated in the through-hole 203 as shown in FIG. 8. Therefore, when the switching unit 130 is accommodated in the through-hole 203, the user can know that the rail portion R and the lighting fixture 1 are connected. On the other hand, when the switching unit 130 is not accommodated in the through-hole 203, the user can know that the rail portion R and the lighting fixture 1 are not connected. That is, the user can determine whether the lighting fixture 1 is attached to the rail portion R by visually checking the state of the switching unit 130. As a result, the user can easily determine the attachment state of the lighting fixture 1 and the rail portion R. In addition, for example, it is no longer necessary to attach a sign indicating that the switching unit 130 is in the first state to the lighting fixture 1. In addition, it is no longer necessary to attach a sign indicating that the switching unit 130 is in the second state to the lighting fixture 1.

[0052] Furthermore, since the switching unit 130 is housed in the through-hole 203 when the lighting fixture 1 is attached to the rail portion R, the switching unit 130 is difficult for a user to see when the user looks at the lighting fixture 1 from the cover member 3 side. This reduces the number of members protruding from the lighting fixture 1, simplifying the appearance of the lighting fixture 1. As a result, the aesthetics of the lighting fixture 1 are improved.

[0053] Further, a plurality of the through-holes 203 may be arranged in the storage section 21. When a plurality of the through-holes 203 are arranged in the storage section 21, the plurality of the through-holes 203 penetrate one of the pair of the second walls 202. That is, each of the plurality of the through-holes 203 penetrates from a part of the first wall 201 to a part of one of the second walls 202. Therefore, when the plug section 100 is arranged in each of the plurality of the through-holes 203, the switching section 130 of the plug section 100 is arranged on the side of one of the second walls 202. That is, the switching section 130 is not arranged on the side of the other of the second walls 202. Therefore, it is not necessary to operate the switching section 130 from a plurality of directions with respect to the lighting device 1, and it is possible to operate the plurality of the switching sections 130 from one direction. As a result, the work efficiency is improved when the lighting device 1 is attached to the rail section R or when the lighting device 1 is removed from the rail section R.

[0054] Furthermore, a plurality of lighting fixtures 1 may be connected to the rail portion R. In this embodiment, since the switching unit 130 is disposed on one side of the second wall 202, the lighting fixtures 1 can be arranged with a small distance between them. In other words, a plurality of lighting fixtures 1 can be attached to the rail portion R in a continuous manner, and can emit a continuous linear light when the lighting fixtures 1 are turned on. Furthermore, even if the lighting fixtures 1 are arranged with a small distance between them, the switching units 130 of adjacent lighting fixtures 1 are spaced apart, so that the operation of each switching unit 130 is not hindered when the switching units 130 are operated.

[0055] Furthermore, when multiple lighting fixtures 1 are arranged on the rail section R, the switching units 130 of the multiple lighting fixtures 1 are located on one side of the second wall 202. Therefore, the multiple lighting fixtures 1 can be attached to the rail section R from one direction. Also, the multiple lighting fixtures 1 can be removed from the rail section R from one direction. As a result, the work efficiency when attaching the multiple lighting fixtures 1 to the rail section R or when removing the multiple lighting fixtures 1 from the rail section R is improved.

[0056] 7 and 8, the plug portion 100 will be described in detail. The plug portion 100 has a plug base portion 140. The connecting portion 120, the switching portion 130, and the conductive portion 160 are attached to the plug base portion 140. The plug base portion 140 has a main body portion 141. The main body portion 141 has a first support plate 142, a second support plate 144, a first rising wall 145, and a second rising wall 147.

[0057] The first support plate 142 faces the rail portion R. The first support plate 142 faces the rail portion R at a position closer than the second support plate 144. The first support plate 142 supports the switching portion 130. The first support plate 142 is approximately parallel to the first wall 201. The first support plate 142 disposed in the through portion 203 blocks a portion of the through portion 203.

[0058] The second support plate 144 faces the rail portion R. The second support plate 144 faces the rail portion R at a position farther away than the first support plate 142. The second support plate 144 is approximately parallel to the first wall 201. The second support plate 144 blocks a portion of the through portion 203 that is different from the portion blocked by the first support plate 142.

[0059] The first rising wall 145 extends from the second support plate 144 toward the first support plate 142. The first rising wall 145 is approximately parallel to the second wall 202. The first rising wall 145 closes a portion of the through portion 203 different from the portion closed by the first support plate 142 and the portion closed by the second support plate 144. A part of the first rising wall 145 faces the second rising wall 147.

[0060] The second rising wall 147 extends from the second support plate 144 toward the first support plate 142. The second rising wall 147 extends in a direction intersecting with the second wall 202. Specifically, the second rising wall 147 extends in a direction substantially perpendicular to the second wall 202. The second rising wall 147 blocks a portion of the through portion 203 that is different from the portion blocked by the first support plate 142, the portion blocked by the second support plate 144, and the portion blocked by the first rising wall 145. The second rising wall 147 faces a portion of the first rising wall 145.

[0061] The second rising wall 147 has a first restricting portion 148. The first restricting portion 148 restricts the rotation of the switching portion 130. Specifically, the first restricting portion 148 restricts the rotation of the switching portion 130, which rotates in the first rotation direction RA at a position where the connecting portion 120 is in the first state. Therefore, the switching portion 130 does not rotate beyond the first restricting portion 148. In other words, the rotation of the switching portion 130 can be restricted at a position where the connecting portion 120 is in the first state. As a result, even though the connecting portion 120 is in the first state, it is possible to suppress the connecting portion 120 from further rotating to be in the second state.

[0062] Next, the plug portion 100 will be described in more detail with reference to Fig. 7 to Fig. 10. Fig. 9 is a view of the plug portion 100 seen from the second main surface B2 side. Fig. 10 is an exploded perspective view of the plug portion 100. As shown in Figs. 9 and 10, the plug portion 100 further has a bolt holding portion 110, a terminal support portion 150, and a nut holding portion 170.

[0063] The bolt holding part 110 holds a bolt (not shown). As shown in FIG. 9 and FIG. 10, the bolt holding part 110 can be combined with the connecting part 120, the switching part 130, the terminal support part 150, and the nut holding part 170. Specifically, the bolt holding part 110 is combined with the connecting part 120. Moreover, the bolt holding part 110 connected with the connecting part 120 is combined with the switching part 130. Moreover, the bolt holding part 110 connected with the connecting part 120 and the switching part 130 is combined with the terminal support part 150. Moreover, the bolt holding part 110 connected with the connecting part 120, the switching part 130, and the terminal support part 150 is combined with the nut holding part 170. The connecting part 120, the switching part 130, the terminal support part 150, and the nut holding part 170 combined with the nut holding part 170 rotate around the rotation axis AX shown in FIG. 8.

[0064] The bolt holding portion 110 has a head portion 101 , a shaft portion 102 , and a through hole 103 .

[0065] The through hole 103 passes through from the head portion 101 to the shaft portion 102. The through hole 103 receives a screw.

[0066] The head portion 101 is exposed to the outside of the storage portion 21. The head portion 101 is inserted into the opening portion R3 of the rail portion R.

[0067] The head 101 has a pair of first grooves 104. Each of the pair of first grooves 104 holds a relay terminal 181. The pair of first grooves 104 is located on the side of the connecting portion 120. The width of the first grooves 104 is larger than the width of the first contact piece 181A. Therefore, the first contact piece 181A can be disposed in each of the pair of first grooves 104. The first grooves 104 prevent the first contact piece 181A from falling off the first grooves 104.

[0068] The shaft portion 102 extends in the Z-axis direction. Specifically, the shaft portion 102 extends from the head portion 101 toward the nut holding portion 170. The outer diameter of the shaft portion 102 is smaller than the outer diameter of the head portion 101. The shaft portion 102 has a rectangular tube portion 105 and a cylindrical portion 106.

[0069] The angular tube portion 105 protrudes outward from the center of the shaft portion 102. The angular tube portion 105 has a substantially rectangular outer shape. The angular tube portion 105 may have a cross shape. The outer diameter of the angular tube portion 105 is larger than the outer shape of the cylindrical portion 106. The angular tube portion 105 abuts against the connecting portion 120.

[0070] The rectangular tube portion 105 has a pair of support bases 105A. Each of the pair of support bases 105A supports a relay terminal portion 181, which will be described later. Each of the pair of support bases 105A presses the relay terminal portion 181 from the center of the shaft portion 102 outward.

[0071] The cylindrical portion 106 abuts against the terminal support portion 150 .

[0072] The connecting portion 120 is located between the bolt holding portion 110 and the switching portion 130. The connecting portion 120 has a pair of relay terminal portions 181, a first cylindrical portion 121, a second cylindrical portion 122, a pair of connecting pieces 126, and a first hole portion 123.

[0073] Each of the pair of relay terminal units 181 contacts the pair of transmission units R1 (see FIG. 24) and relays the external power to the conductive unit 160. The relay terminal unit 181 does not relay the external power to the conductive unit 160 in the first state. The relay terminal unit 181 relays the external power to the conductive unit 160 in the second state. That is, when relaying the external power to the conductive unit 160, the external power is supplied to the power supply unit 15. Also, when not relaying the external power to the conductive unit 160, the external power is not supplied to the power supply unit 15. Therefore, with a single operation of the switching unit 130, it is possible to supply power to the power supply unit 15 and attach the lighting device 1 to the rail unit R. Furthermore, with a single operation of the switching unit 130, it is possible to cut off the power supplied to the power supply unit 15 and remove the lighting device 1 from the rail unit R. As a result, it is possible to reduce the effort required to attach the lighting device 1 to the rail unit R and to remove the lighting device 1 from the rail unit R.

[0074] The pair of relay terminal portions 181 are held by the connecting portion 120. Each of the pair of relay terminal portions 181 is L-shaped. Each of the pair of relay terminal portions 181 has a first contact piece 181A, a middle piece 181B, and a second contact piece 181C.

[0075] The first contact piece 181A is capable of contacting the transmission portion R1 (see FIG. 24) of the rail portion R. The first contact piece 181A is exposed from the accommodation portion 21 of the second unit U2. The intermediate piece 181B is located between the first contact piece 181A and the second contact piece 181C. The second contact piece 181C is capable of contacting the conductive terminal 182, which will be described later. The second contact piece 181C is accommodated in the accommodation portion 21 of the second unit U2.

[0076] The first cylindrical portion 121 abuts against the head 101 of the bolt holding portion 110. The first cylindrical portion 121 extends from the connecting piece 126 toward the head 101. The first contact piece 181A of the intermediate terminal portion 181 is disposed between the first cylindrical portion 121 and the head 101. That is, the first cylindrical portion 121 keeps the first contact piece 181A and the connecting piece 126 apart from each other. As a result, even if there is an obstacle between the first contact piece 181A and the connecting piece 126, the first contact piece 181A and the connecting piece 126 can be rotated. The distance between the first contact piece 181A and the connecting piece 126 corresponds to, for example, the distance from the recess R2 (see FIG. 24) of the rail portion R to the transmission portion R1 (see FIG. 24).

[0077] The first cylindrical portion 121 has a pair of second groove portions 125. Each of the pair of second groove portions 125 holds a first contact piece 181A of the relay terminal portion 181. When the first cylindrical portion 121 abuts against the head portion 101, the pair of first groove portions 104 and the pair of second groove portions 125 face each other. Therefore, the first contact piece 181A is held between the pair of first groove portions 104 and the pair of second groove portions 125. As a result, it is possible to prevent the first contact piece 181A from falling out from between the pair of first groove portions 104 and the pair of second groove portions 125.

[0078] The pair of connecting pieces 126 can be connected to the recessed portion R2 (see FIG. 24) of the rail portion R. Each of the pair of connecting pieces 126 protrudes outward from the center of the first hole portion 123. Specifically, the connecting piece 126 protrudes along the extending direction of the first contact piece 181A. The connecting piece 126 is, for example, rectangular in shape.

[0079] The second cylindrical portion 122 abuts against the switching portion 130. The second cylindrical portion 122 extends from the connecting piece 126 toward the switching portion 130. In other words, the second cylindrical portion 122 keeps the switching portion 130 and the connecting piece 126 apart. As a result, even if there is an obstacle between the switching portion 130 and the connecting piece 126, the connecting piece 126 can be rotated.

[0080] The second cylindrical portion 122 has a locking protrusion 124. The locking protrusion 124 extends toward the switching portion 130.

[0081] The first hole 123 penetrates from the first cylindrical portion 121 to the second cylindrical portion 122. Specifically, the first hole 123 penetrates the first cylindrical portion 121, the connecting piece 126, and the second cylindrical portion 122. The shape of the first hole 123 is, for example, substantially rectangular. Specifically, the shape of the first hole 123 is, for example, a cross shape. The bolt holding portion 110 is inserted into the first hole 123. Specifically, the square tube portion 105 is inserted into the first hole 123. Since the square tube portion 105 having a substantially rectangular shape is inserted into the first hole 123 having a substantially rectangular shape, the bolt holding portion 110 does not rotate inside the first hole 123. Then, the connecting portion 120 and the bolt holding portion 110 are combined.

[0082] The first hole portion 123 has a pair of third groove portions 127. The pair of third groove portions 127 are arranged from the first cylindrical portion 121 to the second cylindrical portion 122. The third groove portion 127 is continuous with the second groove portion 125. When the rectangular tube portion 105 is inserted into the first hole portion 123, the support base 105A and the pair of third groove portions 127 face each other. Therefore, the intermediate piece 181B is held between the support base 105A and the third groove portion 127. As a result, it is possible to prevent the relay terminal portion 181 from falling off the connecting portion 120.

[0083] The switching portion 130 has a third cylindrical portion 131, a lever portion 132, and a second hole portion 133. The third cylindrical portion 131 abuts against the second cylindrical portion 122. The outer shape of the third cylindrical portion 131 is larger than the outer shape of the first cylindrical portion 121 and larger than the outer shape of the second cylindrical portion 122. The third cylindrical portion 131 extends from the lever portion 132 toward the second cylindrical portion 122.

[0084] By having the third cylindrical portion 131, the connecting portion 120 can be disposed at a position beyond an obstacle protruding from the rail portion R toward the second unit U2 side. The obstacle is, for example, a polarity rib. The polarity rib is a mark for preventing the lighting device 1 from being attached to the rail portion R with the wrong polarity. Without the third cylindrical portion 131, the connecting portion may collide with the polarity rib and not rotate. In other words, the polarity rib may prevent the connecting portion from being connected to the rail portion R. In addition, the polarity rib may cause the lighting device 1 to be inclined with respect to the rail portion R. However, by having the third cylindrical portion 131, the connecting portion 120 can be disposed at a position beyond the polarity rib. As a result, the polarity rib can reduce the obstruction of the rotation of the connecting portion 120. Furthermore, the lighting device 1 can be prevented from being disposed in an inclined position with respect to the rail portion R. Note that the height of the extended third cylindrical portion 131 is preferably higher than the height of the polarity rib.

[0085] Furthermore, when the lighting fixture 1 is disposed at the end of the rail section R, a blocking member that blocks the end of the rail section R (a terminal part called a finisher RF, or a connecting part called a joiner) may interfere with the connecting section. In other words, the blocking member of the rail section R may collide with the connecting section, preventing the connecting section from rotating. However, by providing the third cylindrical section 131, the connecting section 120 can be disposed at a position that exceeds the interfering part of the blocking member of the rail section R. As a result, it is possible to reduce the obstruction of the rotation of the connecting section 120 caused by the blocking member of the rail section R. Furthermore, the lighting fixture 1 can be attached to the end of the rail section R.

[0086] The third cylindrical portion 131 has locking recesses 137. The locking recesses 137 are formed in the third cylindrical portion 131 at predetermined angles. The predetermined angle is, for example, "90 degrees." The locking recesses 137 are locked to the locking protrusions 124 of the second cylindrical portion 122. Therefore, the locking recesses 137 determine the positions at which the coupling portion 120 is attached to the switching portion 130. As a result, when attaching the coupling portion 120 to the switching portion 130, it is possible to prevent the coupling portion 120 from being attached to an incorrect position.

[0087] The lever portion 132 has a fourth cylindrical portion 136 and an operating portion 138. The fourth cylindrical portion 136 extends from the third cylindrical portion 131 toward the plug base portion 140.

[0088] The operating portion 138 extends from the fourth cylindrical portion 136. The operating portion 138 is in the form of a rectangular plate. The operating portion 138 has a first surface 138A, a second surface 138B, a third surface 138C, a fourth surface 138D, and a fifth surface 138E.

[0089] The first surface 138A faces the rail portion R.

[0090] The second surface 138B is the surface opposite to the first surface 138A. The second surface 138B faces the plug base portion 140. The second surface 138B has a second engagement portion 138F. The second engagement portion 138F is an engagement recess. The second engagement portion 138F will be described later.

[0091] The third surface 138C is a surface located between the first surface 138A and the second surface 138B. The third surface 138C is located closer to the rotation axis AX than the fourth surface 138D.

[0092] Fourth surface 138D is a surface opposite to third surface 138C, and is a surface located between first surface 138A and second surface 138B.

[0093] The fifth surface 138E is located between the first surface 138A and the second surface 138B, and between the third surface 138C and the fourth surface 138D. The fifth surface 138E is inclined in a direction from the fourth surface 138D toward the rotation axis AX. Therefore, a finger can be placed on the inclined fifth surface 138E. As a result, a finger placed on the fifth surface 138E can be prevented from slipping off the fifth surface 138E when the operating unit 138 is rotated.

[0094] Furthermore, fifth surface 138E has groove 139 in a direction from first surface 138A to second surface 138B. Therefore, it is possible to hook a fingernail into groove 139 of inclined fifth surface 138E. As a result, a finger hooked on operating unit 138 is less likely to slip, and operating unit 138 can be rotated easily.

[0095] The second hole portion 133 penetrates from the third cylindrical portion 131 to the fourth cylindrical portion 136. The shape of the second hole portion 133 is, for example, substantially rectangular. Specifically, the shape of the second hole portion 133 is, for example, a cross shape. The square tube portion 105 is inserted into the second hole portion 133. Since the substantially rectangular square tube portion 105 is inserted into the substantially rectangular second hole portion 133, the bolt holding portion 110 does not rotate inside the second hole portion 133. Then, the connecting portion 120, the bolt holding portion 110, and the switching portion 130 are combined.

[0096] The second hole portion 133 has a pair of fourth groove portions 135. The pair of fourth groove portions 135 are arranged from the third cylindrical portion 131 to the fourth cylindrical portion 136. The fourth groove portion 135 is continuous with the third groove portion 127. That is, the fourth groove portion 135 is continuous with the second groove portion 125 and the third groove portion 127. When the square tube portion 105 is inserted into the second hole portion 133, the support base 105A and the pair of fourth groove portions 135 face each other. Therefore, the intermediate piece 181B is held between the support base 105A and the pair of fourth groove portions 135. As a result, it is possible to prevent the relay terminal portion 181 from falling off the switching portion 130.

[0097] The main body portion 141 of the plug base portion 140 further includes a third support plate 143 , a third rising wall 147 and a pair of mounting portions 149 .

[0098] The third support plate 143 faces the rail portion R. The third support plate 143 faces the rail portion R at a position farther away than the first support plate 142. The third support plate 143 faces the rail portion R at a position closer than the second support plate 144. In addition, the third support plate 143 faces the third cylindrical portion 131. The third support plate 143 abuts against the fourth cylindrical portion 136.

[0099] The third support plate 143 has a through hole 143A. The through hole 143A communicates between the outside of the plug base portion 140 and the inside of the plug base portion 140. In other words, the through hole 143A communicates between the outside of the accommodating portion 21 and the inside of the accommodating portion 21. The relay terminal portion 181 is inserted into the through hole 143A. Specifically, the second contact piece 181C of the relay terminal portion 181 is inserted into the through hole 143A. In other words, the second contact piece 181C inserted into the through hole 143A is located inside the accommodating portion 21.

[0100] The third rising wall 147 extends from the third support plate 143 toward the first support plate 142 .

[0101] The pair of mounting portions 149 mount the plug portion 100 to the second unit U2. Specifically, the pair of mounting portions 149 fix the plug portion 100 to the through portion 203. The pair of mounting portions 149 are connected to the first support plate 142.

[0102] Also, the first rising wall 145 can face the third surface 138C of the operating unit 138. That is, the first rising wall 145 restricts the rotation of the switching unit 130. The first rising wall 145 corresponds to an example of a "second restricting unit". Specifically, the first rising wall 145 restricts the rotation of the switching unit 130, which rotates in the second rotation direction RB at the position P2 where the connecting unit 120 is in the second state. The second rotation direction RB indicates the direction when the switching unit 130 rotates around the rotation axis AX and the connecting unit 120 changes from the first state to the second state. Therefore, the switching unit 130 does not rotate beyond the first rising wall 145. That is, the rotation of the switching unit 130 can be restricted at the position where the connecting unit 120 is in the second state. As a result, even though the coupling portion 120 has been set to the second state, it is possible to prevent the coupling portion 120 from being further rotated and set to the first state.

[0103] Further, the second support plate 144 has a first engagement portion 144A. The first engagement portion 144A is disposed at a position where the connecting portion 120 is in the first state, or at a position where the connecting portion 120 is in the second state. The first engagement portion 144A engages with the second engagement portion 138F. As a result, it is possible to inform the user that the connected state will be changed at the position where the first engagement portion 144A and the second engagement portion 138F engage with each other.

[0104] The first engaging portion 144A is an engaging protrusion. The size of the engaging protrusion of the first engaging portion 144A is smaller than the size of the engaging recess of the second engaging portion 138F. That is, the size of the engaging recess of the second engaging portion 138F is larger than the size of the engaging protrusion of the first engaging portion 144A. Therefore, a gap is formed between the engaging recess of the second engaging portion 138F and the engaging protrusion of the first engaging portion 144A. In other words, there is a play between the engaging recess of the second engaging portion 138F and the engaging protrusion of the first engaging portion 144A. That is, when the switching portion 130 is operated, the switching portion 130 moves easily until the engaging recess of the second engaging portion 138F abuts against the engaging protrusion of the first engaging portion 144A. Therefore, the switching portion 130 can be moved within the range of the gap, and the user's finger can be hooked on the switching portion 130. Therefore, the switching portion 130 can be changed to a posture that is easy to rotate. As a result, the switching portion 130 is easily operated. Furthermore, since the range over which the user can place his / her finger on switching unit 130 is increased compared to when the user places his / her finger on switching unit 130 without moving switching unit 130, switching unit 130 can be rotated with a lighter force.

[0105] The first engaging portion 144A includes a first engaging protrusion 144B and a second engaging protrusion 144C. The first engaging protrusion 144B engages with the engaging recess of the second engaging portion 138F. Specifically, when the rotation of the switching portion 130 is restricted by the first restricting portion 148, the first engaging protrusion 144B engages with the engaging recess of the second engaging portion 138F. The second engaging protrusion 144C is disposed at a position on the second support plate 144 different from the position where the first engaging protrusion 144B is disposed. The second engaging protrusion 144C engages with the engaging recess of the second engaging portion 138F. Specifically, when the rotation of the switching portion 130 is restricted by the first rising wall 145, the second engaging protrusion 144C engages with the engaging recess of the second engaging portion 138F. Therefore, when the first engagement protrusion 144B engages with the engagement recess of the second engagement portion 138F, the user is made to recognize that the coupling portion 120 is in the first state. Also, when the second engagement protrusion 144C engages with the engagement recess of the second engagement portion 138F, the user is made to recognize that the coupling portion 120 is in the second state. As a result, the user can easily recognize to what position the switching portion 130 needs to be moved to change the coupling state.

[0106] As shown in Fig. 10, the first engagement protrusion 144B is disposed between the first rising wall 145 and the second rising wall 147. Also, as shown in Fig. 7 and Fig. 10, the second engagement protrusion 144C is disposed at a position where the first rising wall 145 and the second rising wall 147 do not face each other.

[0107] The terminal support part 150 has a main body part 151 and a through hole 152. The main body part 151 has a protruding part 151A and a pair of fifth groove parts 153. The protruding part 151A protrudes toward the switching part 130. The shape of the protruding part 151A is, for example, substantially rectangular. Specifically, for example, the shape of the protruding part 151A is a cross shape. The protruding part 151A is inserted into the second hole part 133. Since the substantially rectangular protruding part 151A is inserted into the substantially rectangular second hole part 133, the switching part 130 and the terminal support part 150 are combined. That is, the connecting part 120, the bolt holding part 110, the switching part 130, and the terminal support part 150 are combined.

[0108] The pair of fifth grooves 153 are disposed in the extending direction of the through hole 152. The fifth grooves 153 hold the second contact pieces 181C of the relay terminal portion 181. As a result, the relay terminal portion 181 can be prevented from falling off the terminal support portion 150.

[0109] The through hole 152 passes through the main body portion 151. The cylindrical portion 106 of the bolt holding portion 110 is inserted through the through hole 152.

[0110] 8 and 9, the direction in which the conductive portion 160 is arranged when the plug portion 100 is attached to the plug base portion 140 can be set in advance. In this embodiment, the conductive portion 160 is arranged facing the same direction as the first direction PD1 in which the accommodating portion 21 extends. Therefore, the conductive portion 160 can be arranged facing the direction in which the internal space of the accommodating portion 21 becomes wider. As a result, even if the length of the accommodating portion 21 on the second direction PD2 side is shorter than the length of the accommodating portion 21 on the first direction PD1 side, the plug portion 100 can be attached to the second unit U2.

[0111] For example, in the case where the length of the second unit U2 in the second direction PD2 coincides with the length of the rail portion R in the second direction PD2 as in this embodiment, if the conductive portion 160 is arranged along the second direction PD2, the plug portion 100 cannot be attached to the second unit U2. However, since the conductive portion 160 is arranged in the same direction as the first direction PD1 in which the accommodating portion 21 extends, the plug portion 100 can be attached to the accommodating portion 21 as in this embodiment.

[0112] The conductive portion 160 has a main body portion 161 , a through hole 163 , and a pair of conductive terminals 182 .

[0113] The pair of conductive terminals 182 are held by the main body 161. Each of the pair of conductive terminals 182 has a first contact portion 182A and a second contact portion 182B. The first contact portion 182A is located inside the main body 161. The first contact portion 182A can come into contact with the second contact piece 181C. Specifically, as shown in FIG. 8, when the rail portion R and the connecting portion 120 are connected to each other in the second state, the first contact portion 182A comes into contact with the second contact piece 181C. That is, the external power relayed by the relay terminal portion 181 is transmitted to the conductive terminal 182. Therefore, the external power of the external power source can be supplied to the power source unit 15.

[0114] The second contact portion 182B is connected to a power line (not shown) of the power supply unit 15. The second contact portion 182B is located outside the main body portion 161.

[0115] The main body 161 holds a pair of conductive terminals 182. The main body 161 is box-shaped. The main body 161 has a bottom wall 161A and a side wall 161B. A through hole 163 is arranged in the bottom wall 161A. The side wall 161B extends from the bottom wall 161A toward the plug base portion 140.

[0116] The side wall 161B has a pair of terminal holding portions 162. Each of the pair of terminal holding portions 162 holds a conductive terminal 182. Each of the pair of terminal holding portions 162 has a first slit 162A and a second slit 162B. A second contact portion 182B of the conductive terminal 182 is inserted into the first slit 162A. A first contact portion 182A of the conductive terminal 182 is inserted into the second slit 162B.

[0117] The nut holding portion 170 has a main body portion 171 and a through hole 174. The main body portion 171 holds a nut (not shown). The nut is fastened to a bolt inserted through the through hole 103 of the bolt holding portion 110. The through hole 174 passes through the main body portion 171.

[0118] The other plug section 100 that does not supply external power to the power supply section 15 does not have, for example, the relay terminal section 181. Therefore, the one plug section 100 that has the relay terminal section 181 and the other plug section 100 that does not have the relay terminal section 181 share the same members except for the relay terminal section 181. As a result, the manufacturing cost of the plug section 100 can be reduced. Although the other plug section 100 has been described as not having the relay terminal section 181, this is not limited thereto. For example, the other plug section 100 may not have the conductive terminal 182. In other words, it is sufficient that the other plug section 100 is not in a state of supplying power to the power supply section 15.

[0119] [Embodiment 2] Next, lighting fixture 1 of embodiment 2 will be described with reference to Fig. 10 to Fig. 14. Lighting fixture 1 of embodiment 2 has a different shape from lighting fixture 1 of embodiment 1. Below, differences between embodiment 2 and embodiment 1 will be described, and descriptions of parts that overlap with embodiment 1 will be omitted.

[0120] A lighting fixture 1 according to a second embodiment will be described with reference to Figs. 11, 12, and 13. Fig. 11 is a perspective view showing a lighting fixture 1 according to a second embodiment of the present invention. Fig. 12 is a view of the lighting fixture 1 according to the second embodiment as viewed from the rail portion R side. Fig. 12 shows a second state in which the rail portion R and the lighting fixture 1 are connected. In Fig. 12, the rail portion R is omitted for the sake of understanding the invention. Fig. 13 is a view showing a cross section taken along line XII-XII of the lighting fixture 1 shown in Fig. 12.

[0121] The lighting fixture 1 extends along a first direction PD1 and a second direction PD2. The lighting fixture 1 includes a first unit U1 and a second unit U2. The lighting fixture 1 of the second embodiment is connected to a rail portion R by a plug portion 100.

[0122] In this embodiment, the shape of the first unit U1 and the shape of the second unit U2 are substantially the same. For example, if the shape of the first unit U1 is rectangular, the shape of the second unit U2 is rectangular. The first unit U1 and the second unit U2 extend along the first direction PD1. Furthermore, the first unit U1 and the second unit U2 extend along the second direction PD2. Therefore, the first unit U1 and the second unit U2 are unified. Furthermore, the extension direction of the first unit U1 and the extension direction of the second unit U2 are unified. As a result, the sense of unity of the lighting device 1 is improved.

[0123] As shown in FIGS. 11 to 13, the first unit U1 includes a cover member 3, a light source section 7, a base member 13, a power supply section 15, and an attachment member 19. As shown in FIG.

[0124] The second unit U2 includes a housing portion 21 and a pair of plug portions 100. The housing portion 21 has a box shape with one side open. The housing portion 21 includes a first wall 201, a second wall 202, a pair of through-holes 203, and an adjustment plate 206.

[0125] Each of the pair of through-holes 203 in the second embodiment penetrates from the inside of the storage section 21 to the outside of the storage section 21 through a part of the second wall 202 and a part of the first wall 201 that extend along the second direction PD2.

[0126] The pair of plug portions 100 are disposed in a pair of through portions 203. That is, the positions of the plug portions 100 in the second embodiment are different from the positions of the plug portions 100 in the first embodiment by 90 degrees.

[0127] The plug portion 100 has a bolt holding portion 110 , a connecting portion 120 , a switching portion 130 , a plug base portion 140 , a terminal support portion 150 , a conductive portion 160 , and a nut holding portion 170 .

[0128] 13, the coupling portion 120 of the plug portion 100 is exposed, and the conductive portion 160 of the plug portion 100 is housed in the housing portion 21. The conductive portion 160 faces the second main surface B2 at a position different from the position of the second main surface B2 that faces the power supply unit 15. Furthermore, the conductive portion 160 overlaps with the first main surface B1 in a direction intersecting with the base member 13 at a position of the first main surface B1 where the light source unit 7 is disposed.

[0129] Therefore, even in the lighting fixture 1 according to the second embodiment, the plug unit 100 and the power supply unit 15 can be disposed at different positions on the second main surface B2. That is, the plug unit 100 and the power supply unit 15 do not overlap. Therefore, the plug unit 100 and the power supply unit 15 do not overlap, and the vertical thickness of the lighting fixture 1 does not increase. As a result, when the lighting fixture 1 is attached to the rail portion R, it is possible to prevent the lighting fixture 1 from excessively protruding from the surface to which the rail portion R is attached.

[0130] The adjustment plate 206 adjusts the imbalance of the lighting fixture 1. The adjustment plate 206 is attached to the first wall 201. For example, when the components constituting the lighting fixture 1 are arranged in an imbalanced manner inside the lighting fixture 1, the lighting fixture 1 attached to the rail portion R may be tilted according to the imbalance of the components. That is, the lighting fixture 1 may be inclined with respect to the rail portion R. That is, the adjustment plate 206 is attached to the first wall 201 when the lighting fixture 1 is biased in terms of the components. For example, the adjustment plate 206 is disposed at a position opposite to the power supply unit 15. For example, the power supply unit 15 is disposed on the first installation direction D1 side with respect to the center line A passing through the center of the pair of plug units 100. On the other hand, the adjustment plate 206 is disposed on the second installation direction D2 side with respect to the center line A. The first installation direction D1 indicates the direction from the adjustment plate 206 to the power supply unit 15. The second installation direction D2 indicates the direction toward the opposite side of the first installation direction D1. As a result, when the lighting fixture 1 is attached to the rail portion R, the adjustment plate 206 can prevent the lighting fixture 1 from tilting with respect to the rail portion R.

[0131] Adjustment plate 206 also has a plurality of holes 205. Screws B are disposed in the plurality of holes 205. Screws B are located between adjustment plate 206 and rail portion R. This reduces the range in which lighting device 1 tilts relative to rail portion R. As a result, lighting device 1 can be prevented from tilting relative to rail portion R.

[0132] Next, the plug section 100 of the second embodiment will be described in detail with reference to Figures 9, 10 and 14. Figure 14 shows the plug section 100 in the first state.

[0133] The angle of the coupling portion 120 of the plug portion 100 of the second embodiment shown in FIG. 14 is different from the angle of the coupling portion 120 of the plug portion 100 of the first embodiment shown in FIG. 9. Specifically, the angle of the coupling portion 120 of the second embodiment is different from the angle of the coupling portion 120 of the first embodiment by 90 degrees. That is, in the second embodiment, the coupling portion 120 is aligned along the first direction PD1 when in the first state. Furthermore, the coupling portion 120 is aligned along the second direction PD2 when in the second state. Therefore, even if the mounting position of the plug portion 100 is changed according to the shape of the lighting fixture 1, the lighting fixture 1 can be connected to the rail portion R by changing the angle of the coupling portion 120. As a result, the degree of freedom when mounting the plug portion 100 to the lighting fixture 1 is improved.

[0134] For example, when changing the angle of the coupling part 120, the coupling part 120 shown in Fig. 10 is rotated by 90 degrees to cause the locking protrusion 124 of the coupling part 120 to lock with the locking recess 137 of the switching part 130. Thus, when the switching part 130 rotates in the first rotation direction RA, the coupling part 120 is aligned along the second direction PD2. On the other hand, when the switching part 130 rotates in the second rotation direction RB, the coupling part 120 is aligned along the first direction PD1. As a result, even if the mounting position of the plug part 100 is changed, the lighting device 1 can be attached to the rail part R.

[0135] 14, the angle of the conductive portion 160 of the plug portion 100 of the second embodiment is different from the angle of the conductive portion 160 of the plug portion 100 of the first embodiment shown in FIG. 9. Specifically, the angle of the conductive portion 160 of the second embodiment is different from the angle of the conductive portion 160 of the first embodiment by 90 degrees. That is, in the second embodiment, the conductive terminal 182 protrudes from the plug base portion 140. Therefore, the position of the conductive portion 160 relative to the plug base portion 140 can be changed in accordance with the position of the power supply portion 15. As a result, the degree of freedom in arranging the power supply portion 15 is improved.

[0136] For example, when changing the angle of the conductive part 160, the conductive part 160 shown in FIG. 10 is rotated by 90 degrees and fixed to the plug base part 140. Therefore, the position of the conductive part 160 can be changed according to the direction in which the power supply part 15 is arranged. As a result, it becomes easy to connect the power supply part 15 and the conductive part 160 inside the lighting fixture 1.

[0137] Furthermore, in the lighting fixture 1 of the present embodiment, when the lighting fixture 1 is attached to the rail portion R, the switching unit 130 is housed in the through-hole 203. In other words, when multiple lighting fixtures 1 are attached to the rail portion R, the lighting fixtures 1 can be arranged with a small distance between each other. In other words, multiple lighting fixtures 1 can be attached to the rail portion R in a continuous line. As a result, the aesthetic appearance when multiple lighting fixtures 1 are arranged side by side is improved.

[0138] [Embodiment 3] Next, lighting fixture 1 of embodiment 3 will be described with reference to Figs. 15 to 25. Lighting fixture 1 of embodiment 3 has a different shape from lighting fixture 1 of embodiment 1. Below, differences between embodiment 3 and embodiment 1 will be described, and descriptions of parts that overlap with embodiment 1 will be omitted.

[0139] A lighting fixture 1 according to a third embodiment will be described with reference to Figs. 15 to 17. Fig. 15 is a perspective view showing a lighting fixture 1 according to a third embodiment of the present invention. Fig. 16 is an exploded perspective view of the lighting fixture 1 according to the third embodiment. Fig. 17 is a schematic view showing a cross section of the lighting fixture 1 according to the third embodiment. In the lighting fixture 1 according to the third embodiment, the first unit U1 is accommodated inside the second unit U2 so as to expose the lower surface 31 of the cover member 3 of the first unit U1. Note that "exposing the lower surface 31" in this embodiment refers to a state in which the lower surface 31 of the cover member 3 is located inside or outside the second unit U2 and the lower surface 31 is visible from the outside of the second unit U2. Therefore, the first unit U1 in this embodiment can be in any of the following states: a state in which the entire unit is accommodated inside the second unit U2; a state in which the lower surface 31 is located on the same plane as the lower surface of the second unit U2; and a state in which the first unit U1 partially or entirely protrudes from the second unit U2.

[0140] As shown in FIG. 15, the lighting fixture 1 is attached to the rail portion R. The lighting fixture 1 emits light. The lighting fixture 1 extends along a first direction PD1. The lighting fixture 1 includes a first unit U1 and a second unit U2. The lighting fixture 1 of the third embodiment is connected to the rail portion R by a plug portion 100.

[0141] The first unit U1 emits light and functions as a light source unit. As shown in Fig. 15 to Fig. 17, the first unit U1 is housed inside the second unit U2. The first unit U1 includes a cover member 3, a light source unit 7, a base member 13, a power supply unit 15, and an attachment member 19.

[0142] The cover member 3 diffuses the light emitted by the light source unit 7. In the lighting device 1 of the third embodiment, since the first unit U1 is housed inside the second unit U2, the light is emitted from the lower surface 31 of the cover member 3 of the first unit U1. In other words, the lower surface 31 of the cover member 3 is an emission surface.

[0143] The light source unit 7 emits light. As shown in Fig. 17, the light source unit 7 includes a substrate 9 and a plurality of light-emitting elements 11. The light source unit 7 is covered with a cover member 3. That is, the light emitted by the light source unit 7 is diffused by the cover member 3.

[0144] The base member 13 is a heat sink, and dissipates heat generated when the light source unit 7 emits light. The light source unit 7 is attached to the base member 13. The cover member 3 is fixed to the base member 13.

[0145] As shown in FIG. 16 and FIG. 17, the mounting members 19 mount the first unit U1 to the first wall 201 of the accommodation section 21 of the second unit U2. The first unit U1 has a pair of mounting members 19. The pair of mounting members 19 are mounted to the first wall 201 of the second unit U2 with a gap between them. The pair of mounting members 19 face each other via the power supply unit 15. The pair of mounting members 19 are respectively disposed on a pair of end sides of the first unit U1 in the first direction PD1. Specifically, one of the pair of mounting members 19 is disposed at one end of the first unit U1 in the first direction PD1. One of the pair of mounting members 19 is disposed at the other end of the first unit U1 in the first direction PD1.

[0146] As shown in FIG. 16 and FIG. 17, the power supply unit 15 supplies power to the light source unit 7 via a power line (not shown). Specifically, the power supply unit 15 supplies power to the light source unit 7 based on external power from an external power source. As shown in FIG. 16 and FIG. 17, the power supply unit 15 is disposed between the plug units 100. Therefore, the plug units 100 and the power supply unit 15 can be disposed at different positions on the second main surface B2. That is, the plug units 100 and the power supply unit 15 do not overlap in the third direction PD3. Therefore, the plug units 100 and the power supply unit 15 do not overlap, and the thickness of the lighting device 1 in the vertical direction does not increase. As a result, when the lighting device 1 is attached to the rail unit R, it is possible to suppress the lighting device 1 from excessively protruding from the surface to which the rail unit R is attached.

[0147] Furthermore, the power supply unit 15 is disposed closer to one of the pair of mounting members 19. Therefore, the power supply unit 15 is not disposed in the center portion of the first unit U1. This makes it possible to prevent weight from being applied to the center portion of the first unit U1. As a result, it is possible to prevent the center portion of the first unit U1 from sagging in the third direction PD3.

[0148] The second unit U2 includes a housing portion 21, a pair of second closing members 23, and a pair of plug portions 100.

[0149] As shown in Fig. 17, the storage section 21 of the third embodiment stores the first unit U1. The storage section 21 has a box shape with one side open. Specifically, the bottom side of the storage section 21 is open. The storage section 21 has an opening extending along the first direction PD1.

[0150] The accommodation portion 21 of the second unit U2 further includes a first wall 201, a pair of second walls 202, and a pair of through-holes 203.

[0151] The first wall 201 faces the rail portion R. The pair of second walls 202 are disposed between the pair of second closing members 23. The pair of second walls 202 includes one second wall 202A and the other second wall 202B. The second wall 202A and the second wall 202B extend from the first wall 201 in the third direction PD3. Specifically, the second wall 202A and the second wall 202B extend from the first wall 201 in a direction toward the lower surface 31 of the cover member 3 of the first unit U1.

[0152] The pair of second closing members 23 respectively close a pair of open ends 24 in the longitudinal direction of the storage section 21. The pair of second closing members 23 are fixed to a pair of end portions in the longitudinal direction of the storage section 21, respectively.

[0153] 18, the pair of through-holes 203 penetrate from a part of the first wall 201 to a part of one of the second walls 202A, between the inside and the outside of the accommodation unit 21. A plug unit 100 is disposed in each of the pair of through-holes 203. The pair of plug units 100 attach the second unit U2, which accommodates the first unit U1, to the rail unit R. One of the pair of plug units 100 supplies external power to the lighting fixture 1 by being connected to the rail unit R.

[0154] As in embodiment 1, the plug portion 100 has a bolt holding portion 110 (see Figure 10), a connecting portion 120, a switching portion 130 (see Figure 10), a plug base portion 140 (see Figure 10), a terminal support portion 150 (see Figure 10), a conductive portion 160 (see Figure 10), and a nut holding portion 170 (see Figure 10).

[0155] Next, the second unit U2 of the lighting fixture 1 of embodiment 3 will be described in detail with reference to Fig. 15 to Fig. 19. Fig. 18 is an enlarged view of a portion of the second unit U2 of the lighting fixture 1 of embodiment 3. Fig. 19 is a view of the second unit U2 shown in Fig. 18 as viewed from the ceiling surface side.

[0156] As shown in FIGS. 18 and 19, the through portion 203 has a first through hole 203A, a second through hole 203B, and a third through hole 203C.

[0157] The first through hole 203A is a through hole located in the first wall 201. The first through hole 203A extends in a first direction PD1. The first through hole 203A is adjacent to the second through hole 203B in the second direction PD2.

[0158] 18 and 19, the plug base portion 140 of the plug portion 100 is located in the first through hole 203A. The size of the first through hole 203A corresponds to the size of the plug base portion 140. The length of the first through hole 203A in the first direction PD1 is length L1. The length of the first through hole 203A in the second direction PD2 is length L2.

[0159] The second through hole 203B is a through hole located in the first wall 201. The second through hole 203B extends in the first direction PD1. The second through hole 203B is adjacent to the first through hole 203A in the second direction PD2.

[0160] 18 and 19, the plug portion 100 and a first light-shielding portion 301 (described later) are located in the second through hole 203B. The size of the second through hole 203B corresponds to the size of the first light-shielding portion 301. The length L3 of the second through hole 203B in the first direction PD1 is longer than the length L1. The length L4 of the second through hole 203B in the second direction PD2 is shorter than the length L2.

[0161] The third through hole 203C is a through hole located in the second wall 202A. The third through hole 203C extends in the first direction PD1. The third through hole 203C is adjacent to the second through hole 203B.

[0162] 18 and 19, a first light-shielding portion 301, which will be described later, is located in the third through hole 203C. The size of the third through hole 203C corresponds to the size of the first light-shielding portion 301. The length of the third through hole 203C in the first direction PD1 is length L4. The length L5 of the third through hole 203C in the third direction PD3 is approximately the same as the length of the plug base portion 140 in the third direction PD3.

[0163] Therefore, the plug section 100 can be positioned in the through-hole 203 from the side of the third through-hole 203C. Therefore, it is possible to attach the plug section 100 in a state where the first unit U1 is accommodated in the accommodation section 21. Also, it is possible to remove the plug section 100 from the accommodation section 21 in a state where the first unit U1 is accommodated in the accommodation section 21. That is, when attaching and removing the plug section 100, it is not necessary to separate the first unit U1 and the second unit U2. Therefore, it is possible to easily attach the plug section 100 to the through-hole 203 of the accommodation section 21. It is possible to easily remove the plug section 100 from the through-hole 203 of the accommodation section 21. As a result, the work efficiency of attaching and removing the plug section 100 is improved.

[0164] Next, the second unit U2 will be described in more detail with reference to Figures 18 to 24. Figure 20 is a cross-sectional view taken along line XX-XX of the lighting fixture 1 shown in Figure 18.

[0165] As shown in FIG. 20, the accommodation portion 21 of the second unit U2 of the third embodiment has therein a first locking piece 221A and a second locking piece 221B.

[0166] The first locking piece 221A is disposed on the second wall 202A of the accommodation portion 21. The first locking piece 221A protrudes from the second wall 202A toward the second wall 202B. The first locking piece 221A extends along the first direction PD1.

[0167] The second locking piece 221B is disposed on the second wall 202B of the accommodation portion 21. The second locking piece 221B protrudes from the second wall 202B toward the second wall 202A. The second locking piece 221B extends along the first direction PD1.

[0168] As shown in FIG. 20, the second unit U2 of the third embodiment further includes a first light shielding portion 301 and a second light shielding portion 351.

[0169] The first light-shielding portion 301 restricts light from leaking out of the accommodation portion 21 from the through-hole 203. Specifically, the first light-shielding portion 301 restricts light from leaking out from the second through-hole 203B and the third through-hole 203C.

[0170] Furthermore, for example, first light-shielding portion 301 can prevent dust and the like from the outside of lighting fixture 1 from entering the inside of lighting fixture 1 through penetration portion 203.

[0171] The first light shielding part 301 is made of a hard material. The hard material is made of, for example, synthetic resin or metal. The synthetic resin is, for example, ABS resin. By making the first light shielding part 301 of a hard material, it becomes easier to assemble the first light shielding part 301 to the second unit U2 compared to a flexible material.

[0172] The plug base portion 140 of the plug portion 100 prevents light from leaking from the first through hole 203A. The plug portion 100 is formed of a light-shielding member. Therefore, it is possible to prevent light from leaking from the first through hole 203A, the second through hole 203B, and the third through hole 203C. As a result, it is possible to suppress deterioration in aesthetics caused by the through portion 203 becoming conspicuous due to light leaking from the through portion 203.

[0173] For example, when light leaks from each through-hole of a plurality of lighting fixtures, the light leaking from each through-hole of the plurality of lighting fixtures is more noticeable than the light on a single line, giving a sense of incongruity to the user. This may reduce the aesthetics of the lighting fixture. On the other hand, in this embodiment, the first light-shielding part 301 and the plug part 100 can restrict light from leaking from the first through-hole 203A, the second through-hole 203B, and the third through-hole 203C. That is, light is emitted only from the lower surface 31 of the lighting fixture 1, and light does not leak from the through-hole 203, which can suppress the sense of incongruity to the user. Therefore, when a plurality of lighting fixtures 1 are attached to a single rail part R, light is emitted from each lower surface 31 of the plurality of lighting fixtures 1. As a result, it is possible to emit light in a single line, improving the aesthetics of the lighting fixture 1.

[0174] The second light-shielding portion 351 restricts light from leaking out of the storage portion 21 from the through-hole 203. Specifically, the second light-shielding portion 351 restricts light emitted from the side surface of the cover member 3 from being reflected inside the storage portion 21 and heading toward the through-hole 203. This makes it possible to reduce the amount of light heading toward the through-hole 203. As a result, it is possible to further restrict light from leaking out of the through-hole 203.

[0175] The second light shielding part 351 is made of a hard material. The hard material is made of, for example, synthetic resin or metal. The synthetic resin is, for example, ABS resin. By making the second light shielding part 351 of a hard material, it becomes easier to assemble the second light shielding part 351 to the second unit U2 compared to a flexible material.

[0176] Next, the first light-shielding part 301 and the second light-shielding part 351 will be described in more detail with reference to Figs. 18 to 24. Fig. 21 is a diagram showing the plug part 100, the first light-shielding part 301, and the second light-shielding part 351 of the third embodiment. Fig. 22 is an exploded perspective view showing the plug part 100, the first light-shielding part 301, and the second light-shielding part 351 of the third embodiment. Fig. 23(a) is an enlarged view of the first light-shielding part 301. Fig. 23(b) is an enlarged view of the second light-shielding part 351. Fig. 24 is a diagram showing a XXIV-XXIV cross section of the lighting device 1 shown in Fig. 19.

[0177] As shown in Fig. 21, the first light-shielding portion 301 has a U-shape. As shown in Fig. 22 and Fig. 23, the first light-shielding portion 301 has a first surface 301A and a second surface 301B. The first surface 301A is a surface in the opposite direction to the third direction PD3. The second surface 301B is a surface in the third direction PD3.

[0178] 22 and 23, a first opening 310 and a second opening 320 are located on the first surface 301A side of the first light-shielding part 301. The first opening 310 is located on the second wall 202A side. The first opening 310 is larger than the second opening 320. In the first light-shielding part 301, the opening becomes larger from the second opening 320 toward the first opening 310. The first opening 310 and the second opening 320 are openings for a user to access the lever part 132 of the plug part 100.

[0179] 20, the second opening 320 is located closer to the second wall 202B than the first opening 310. The plug portion 100 is inserted into the second opening 320. Specifically, the plug base portion 140 of the plug portion 100 is inserted into the second opening 320. When the plug base portion 140 is inserted into the second opening 320, the plug base portion 140 and the first surface 301A of the first light-shielding portion 301 abut against each other. Therefore, it is possible to suppress light from leaking out from between the plug base portion 140 and the first light-shielding portion 301.

[0180] 20, the second surface 301B of the first light-shielding portion 301 abuts against the edge of the through-hole portion 203 of the housing portion 21. Therefore, leakage of light from between the first light-shielding portion 301 and the housing portion 21 can be suppressed.

[0181] 20, the second surface 301B of the first light shielding portion 301 abuts against the second light shielding portion 351. Therefore, leakage of light from between the first light shielding portion 301 and the second light shielding portion 351 can be suppressed.

[0182] As shown in FIG. 20, the first light blocking portion 301 has a restricting portion 302, a contact portion 303, and a groove portion 304.

[0183] The abutment portion 303 abuts against the plug base portion 140. The abutment between the abutment portion 303 and the plug base portion 140 can suppress leakage of light from between the abutment portion 303 and the plug base portion 140. The abutment portion 303 is disposed on the first surface 301A of the first light shielding portion 301.

[0184] The restricting portion 302 restricts the movement of the plug portion 100. The restricting portion 302 is disposed on the first surface 301A of the first light-shielding portion 301. The restricting portion 302 protrudes beyond the abutting portion 303. Therefore, when the plug base portion 140 of the plug portion 100 abuts against the abutting portion 303, the restricting portion 302 can restrict the movement of the plug portion 100 in the direction from the second wall 202B toward the second wall 202A.

[0185] The restricting portion 302 also has an inclined surface. The inclined surface is inclined in a direction from the plug base portion 140 toward the edge of the third through hole 203C. The inclined surface is also inclined so that the opening becomes larger from the second opening 320 toward the first opening 310. This makes it easier to access the lever portion 132 of the plug portion 100. As a result, the lever portion 132 of the plug portion 100 can be easily operated.

[0186] As shown in FIG. 20, the lever portion 132 of the plug portion 100 of the third embodiment is located closer to the second wall 202B than to the second wall 202A. For example, if the restricting portion does not have an inclined surface, the finger touches the wall between the second opening and the first opening, making it difficult to operate the lever portion. In other words, the action of raising the lever portion by placing a finger on the lever portion is hindered by the wall between the second opening and the first opening. On the other hand, since the restricting portion 302 of the third embodiment has an inclined surface, it is possible to reduce the inhibition of the action of raising the lever portion 132 by the wall between the second opening and the first opening. As a result, the lever portion 132 of the plug portion 100 can be easily operated.

[0187] Groove 304 is disposed on second surface 301B. It is a hole in the direction from second surface 301B to first surface 301A. A first support piece 374A, a second support piece 374B, and a third support piece 374C of second light blocking portion 351, which will be described later, are inserted into groove 304.

[0188] Specifically, as shown in FIGS. 21 to 23, first light-shielding section 301 includes a first light-shielding portion 331, a second light-shielding portion 332, and a third light-shielding portion 333.

[0189] 23, the first light shielding portion 331 is located between the second light shielding portion 332 and the third light shielding portion 333. The first light shielding portion 331 extends in a direction along the first direction PD1. As shown in Fig. 22 and Fig. 23, the first light shielding portion 331 has a restricting portion 302A, a contact portion 303A, and a groove portion 304A.

[0190] When the second support plate 144 of the plug base portion 140 abuts against the abutting portion 303A, the restricting portion 302A restricts the movement of the plug portion 100 in the direction from the second wall 202B toward the second wall 202A. The restricting portion 302A protrudes beyond the abutting portion 303A.

[0191] The restricting portion 302A has an inclined surface that is inclined in a direction from the second support plate 144 of the plug base portion 140 toward the edge of the third through-hole 203C.

[0192] The contact portion 303A comes into contact with the plug base portion 140. By the contact portion 303A and the plug base portion 140 coming into contact with each other, leakage of light from between the contact portion 303A and the plug base portion 140 can be suppressed.

[0193] 22, the groove 304A is a hole in the direction from the second surface 301B toward the first surface 301A. The groove 304A extends along the first direction PD1. A first support piece 374A, which will be described later, is inserted into the groove 304A.

[0194] 21 to 23, the second light shielding portion 332 stands upright from the first light shielding portion 331 and faces the third light shielding portion 333. The second light shielding portion 332 extends in the third direction PD3. The second light shielding portion 332 has a restricting portion 302B, a contact portion 303B, and a groove portion 304B.

[0195] When the plug base portion 140 abuts against the abutting portion 303B, the restricting portion 302B restricts the movement of the plug portion 100 in the direction from the second wall 202B toward the second wall 202A. The restricting portion 302B protrudes from the abutting portion 303B in the direction from the second light-shielding portion 332 toward the third light-shielding portion 333.

[0196] The restricting portion 302B has an inclined surface that is inclined in a direction from the first restricting portion 148 of the plug base portion 140 toward the edge of the third through-hole 203C.

[0197] The contact portion 303B comes into contact with the plug base portion 140. By the contact portion 303B and the plug base portion 140 coming into contact with each other, leakage of light from between the contact portion 303B and the plug base portion 140 can be suppressed.

[0198] The groove 304B is a hole in a direction from the second surface 301B toward the first surface 301A. The groove 304B extends along the third direction PD3. An end of the groove 304B on the third direction PD3 side is open. An end of the groove 304B on the opposite side of the third direction PD3 is closed. The groove width of the groove 304B increases toward the first light-shielding portion 331. In other words, the groove width of the end of the groove 304B on the third direction PD3 side is increased. Therefore, the second support piece 374B of the second light-shielding portion 351 described later can be guided to the groove 304B. As a result, it becomes easy to insert the second support piece 374B of the second light-shielding portion 351 into the groove 304B.

[0199] 21 to 23, the third light shielding portion 333 stands upright from the first light shielding portion 331 and faces the second light shielding portion 332. The third light shielding portion 333 extends in the third direction PD3. The third light shielding portion 333 has a restricting portion 302C, a contact portion 303C, and a groove portion 304C.

[0200] When the plug base portion 140 abuts against the abutting portion 303C, the restricting portion 302C restricts the movement of the plug portion 100 in the direction from the second wall 202B toward the second wall 202A. The restricting portion 302C protrudes from the abutting portion 303C in the direction from the third light-shielding portion 333 toward the second light-shielding portion 332.

[0201] The restricting portion 302C has an inclined surface that is inclined in a direction from the first restricting portion 148 of the plug base portion 140 toward the edge of the third through-hole 203C.

[0202] The contact portion 303C comes into contact with the plug base portion 140. By the contact portion 303C and the plug base portion 140 coming into contact with each other, leakage of light from between the contact portion 303C and the plug base portion 140 can be suppressed.

[0203] The groove 304C is a hole in a direction from the second surface 301B toward the first surface 301A. The groove 304C extends along the third direction PD3. An end of the groove 304C on the third direction PD3 side is open. An end of the groove 304C on the opposite side of the third direction PD3 is closed. The groove 304C has a larger width toward the first light-shielding portion 331. In other words, the groove width of the end of the groove 304C on the third direction PD3 side is larger. Therefore, the third support piece 374C of the second light-shielding portion 351 described later can be guided to the groove 304C. As a result, it becomes easier to insert the third support piece 374C of the second light-shielding portion 351 into the groove 304C.

[0204] As shown in FIGS. 20 to 24, the second light-shielding section 351 has a first light-shielding plate 360, a second light-shielding plate 370, and a pair of third light-shielding plates 380. As shown in FIG.

[0205] As shown in Fig. 20, the first light-shielding plate 360 ​​is located between the light source unit 7 and the plug unit 100. As shown in Fig. 24, the plug unit 100 is located above the first light-shielding plate 360, and the light source unit 7 is located below the first light-shielding plate 360. In other words, the first light-shielding plate 360 ​​is located between the light source unit 7 and the plug unit 100, and regulates the light reflected inside the housing unit 21 from proceeding toward the through-hole portion 203. The first light-shielding plate 360 ​​extends along a first direction PD1.

[0206] As shown in FIG. 24, the first light shielding plate 360 ​​has a first locking piece 361 and a second locking piece 362.

[0207] 24, the first locking piece 361 protrudes from the first light shielding plate 360 ​​toward the second wall 202A. The first locking piece 361 faces the first locking piece 221A of the second wall 202B of the housing section 21. Specifically, the surface of the first locking piece 221A facing the light source unit 7 faces the first locking piece 361. The first locking piece 221A extends along the first direction PD1.

[0208] 24, the second locking piece 362 protrudes from the first light shielding plate 360 ​​toward the second wall 202B. The second locking piece 362 faces the second locking piece 221B of the second wall 202B of the housing section 21. Specifically, the surface of the second locking piece 221B facing the light source unit 7 faces the second locking piece 362. The second locking piece 221B extends along the first direction PD1.

[0209] Therefore, when the first light-shielding plate 360 ​​moves toward the plug portion 100, the first locking piece 221A of the second wall 202A comes into contact with the first locking piece 361. Furthermore, when the first light-shielding plate 360 ​​moves toward the plug portion 100, the second locking piece 221B of the second wall 202B comes into contact with the second locking piece 362. As a result, the first light-shielding plate 360 ​​is prevented from moving toward the plug portion 100 beyond the first locking piece 221A and the second locking piece 221B.

[0210] One of the pair of third light shielding plates 380 is disposed at one end of both ends of the first light shielding plate 360 ​​in the first direction PD1. The other of the pair of third light shielding plates 380 is disposed at the other end of both ends of the first light shielding plate 360 ​​in the first direction PD1. A first locking piece 361 is disposed at one end of the first light shielding plate 360 ​​in the second direction PD2. A second locking piece 362 is disposed at the other end of the first light shielding plate 360 ​​in the second direction PD2. A second light shielding plate 370 is disposed between the first locking piece 361 and the second locking piece 362.

[0211] Moreover, the first light-shielding plate 360 ​​has a plurality of positioning portions 363. The plurality of positioning portions 363 protrude from the first light-shielding plate 360 ​​in the third direction PD3. The positioning portions 363 are used for positioning when the first unit U1 is accommodated in the accommodation portion 21 of the second unit U2. Therefore, it is possible to prevent the cover member 3 of the first unit U1 from being excessively accommodated in the accommodation portion 21 of the second unit U2. It is also possible to prevent the cover member 3 of the first unit U1 from excessively protruding from the accommodation portion 21 of the second unit U2. As a result, it is possible to arrange the first unit U1 at an appropriate position inside the accommodation portion 21 of the second unit U2.

[0212] Therefore, the opening of the accommodation portion 21 of the second unit U2 and the lower surface 31 of the cover member 3 of the first unit U1 are flush with each other. This improves the aesthetic appearance when the first unit U1 is accommodated in the accommodation portion 21 of the second unit U2. In addition, since the position of the first unit U1 is determined by the positioning portion 363, the work efficiency when attaching the first unit U1 to the second unit U2 is improved.

[0213] As shown in Fig. 24, the second light-shielding plate 370 is located between the plug part 100 and the second wall 202A. Specifically, the second light-shielding plate 370 is located between the plug part 100 and the second wall 202A, and restricts the light reflected inside the housing part 21 from proceeding toward the through part 203. The second light-shielding plate 370 extends from the first light-shielding plate 360 ​​in the opposite direction to the third direction PD3. The second light-shielding plate 370 extends along the first direction PD1. The second light-shielding plate 370 also extends along the third direction PD3.

[0214] The second light blocking plate 370 has a pair of third locking pieces 371, a first support piece 374A, a second support piece 374B, a third support piece 374C, and an opening 370H.

[0215] One of the pair of third locking pieces 371 is disposed at one end of both ends of the second light-shielding plate 370 in the first direction PD1. In addition, a slit 365 is located between one end of the second light-shielding plate 370 and one end of the first light-shielding plate 360. That is, one end of the second light-shielding plate 370 and one end of the first light-shielding plate 360 ​​are spaced apart from each other. Therefore, one end of the second light-shielding plate 370 swings in a direction toward the first light-shielding plate 360 ​​or in a direction toward the second wall 202A.

[0216] The other of the pair of third locking pieces 371 is disposed at the other end of both ends of the second light-shielding plate 370 in the first direction PD1. In addition, a slit 365 is located between the other end of the second light-shielding plate 370 and the other end of the first light-shielding plate 360. That is, the other end of the second light-shielding plate 370 and the other end of the first light-shielding plate 360 ​​are spaced apart from each other. Therefore, the other end of the second light-shielding plate 370 swings in a direction toward the first light-shielding plate 360 ​​or in a direction toward the second wall 202A.

[0217] As shown in FIG. 24, each of the pair of third locking pieces 371 protrudes from the second light shielding plate 370 toward the second wall 202A. Also, as shown in FIG. 24, each of the pair of third locking pieces 371 protrudes from the second light shielding plate 370 toward the second wall 202B. Therefore, the strength of each of the pair of third locking pieces 371 is improved. Also, the pair of third locking pieces 371 extend along the second direction PD2. Therefore, the worker can remove the second light shielding unit 351 from the storage unit 21 by using the portion of the pair of third locking pieces 371 extending along the second direction PD2. For example, the worker grasps the portion of the pair of third locking pieces 371 extending along the second direction PD2 with his / her fingers and moves the pair of third locking pieces 371 in a direction toward the first light shielding plate 360. The second light-shielding part 351 can be removed from the accommodation part 21 by moving the pair of third locking pieces 371 in a direction toward the first light-shielding plate 360. In addition, since an operator can grasp the portions of the pair of third locking pieces 371 extending along the second direction PD2 with his / her fingers, the efficiency of the installation and removal work of the second light-shielding part 351 is improved.

[0218] Each of the pair of third locking pieces 371 has an opposing surface 373 and an inclined surface 376. The opposing surface 373 faces the surface of the first locking piece 221A on the first wall 201 side. Therefore, when the second light-shielding plate 370 moves toward the light source unit 7, the opposing surface 373 of the third locking piece 371 comes into contact with the first locking piece 221A. As a result, the second light-shielding plate 370 is prevented from moving beyond the first locking piece 221A toward the light source unit 7.

[0219] The inclined surface 376 is inclined from the opposing surface 373 toward the plug portion 100. When the second light blocking portion 351 is attached to the accommodating portion 21, the second light blocking portion 351 is inserted into the accommodating portion 21 from the side of the third direction PD3. At this time, the inclined surface 376 abuts against the first locking piece 221A. As the inclined surface 376 abuts against the first locking piece 221A, the inclined surface 376 is pressed by the first locking piece 221A. Therefore, both ends of the second light blocking plate 370 are moved toward the first light blocking plate 360.

[0220] Furthermore, by further inserting the second light shielding plate 370 toward the first wall 201, the surface of the first locking piece 221A on the first wall 201 side faces the opposing surface 373 of the pair of third locking pieces 371. Furthermore, the surface of the first locking piece 221A on the light source unit 7 side faces the first locking piece 361, and the surface of the second locking piece 221B on the light source unit 7 side faces the second locking piece 362. Therefore, the movement of the second light shielding part 351 in the direction toward the light source unit 7 side and the movement in the direction toward the first wall 201 side are suppressed. As a result, the position of the second light shielding part 351 is fixed by the pair of third locking pieces 371, the first locking piece 361, and the second locking piece 362.

[0221] At least one of the pair of third locking pieces 371 may have a notch. As shown in Fig. 24, the notch is formed between the third locking piece 371 and the third light blocking plate 380. A power line (not shown) connected to the plug unit 100 is disposed in the notch. The position of the power line can be determined by the notch.

[0222] The opening 370H is located between the pair of third locking pieces 371. As shown in Fig. 21, the first light blocking portion 301 is located in the opening 370H. The opening 370H is surrounded by the first support piece 374A, the second support piece 374B, and the third support piece 374C.

[0223] The first support piece 374A supports the first light shielding portion 331 of the first light shielding unit 301. Specifically, as shown in Fig. 20, the first support piece 374A is inserted into the groove portion 304A of the first light shielding portion 331, whereby the first support piece 374A supports the first light shielding portion 331. Furthermore, the first support piece 374A is inserted into the groove portion 304A of the first light shielding portion 331, whereby leakage of light from between the first light shielding portion 331 and the first support piece 374A can be suppressed.

[0224] The second support piece 374B supports the second light shielding portion 332 of the first light shielding section 301. Specifically, the second support piece 374B is inserted into the groove portion 304B of the second light shielding portion 332, so that the second support piece 374B supports the second light shielding portion 332. Furthermore, the second support piece 374B is inserted into the groove portion 304B of the second light shielding portion 332, so that leakage of light from between the second light shielding portion 332 and the second support piece 374B can be suppressed.

[0225] The third support piece 374C supports the third light shielding portion 333 of the first light shielding portion 301. Specifically, the third support piece 374C is inserted into the groove portion 304C of the third light shielding portion 333, thereby the third support piece 374C supports the third light shielding portion 333. Furthermore, the third support piece 374C is inserted into the groove portion 304C of the third light shielding portion 333, thereby making it possible to suppress leakage of light from between the third light shielding portion 333 and the third support piece 374C.

[0226] The pair of third light-shielding plates 380 restrict light reflected inside the housing portion 21 from proceeding from the first direction PD1 toward the through-hole portion 203. The third light-shielding plate 380 stands upright in the opposite direction to the third direction PD3 from the first light-shielding plate 360. The third light-shielding plate 380 extends along the third direction PD3.

[0227] As shown in FIG. 24, the shape of the lighting fixture 1 of the third embodiment and the shape of the rail portion R are substantially the same. For example, the cross-sectional shape of the second unit U2 that houses the first unit U1 is rectangular. Specifically, the shape of the second unit U2 that houses the first unit U1 is a rectangular parallelepiped. The cross-sectional shape of the rail portion R is also rectangular. Specifically, the shape of the rail portion R is a rectangular parallelepiped. The first unit U1 is housed in the second unit U2. The lighting fixture 1 in which the second unit U2 is housed in the first unit U1 extends along the first direction PD1, and the rail portion R also extends along the first direction PD1. Furthermore, the length of the lighting fixture 1 in the second direction PD2 and the length of the rail portion R in the second direction PD2 are substantially the same. Therefore, when the lighting fixture 1 is connected to the rail portion R, almost the entirety of the connection portion 120 of the plug portion 100 is housed inside the rail portion R, and the lighting fixture 1 can be disposed in a position close to the rail portion R. Therefore, it is possible to reduce the gap that occurs between the lighting fixture 1 and the rail portion R when the lighting fixture 1 is attached to the rail portion R. As a result, the gap between the lighting fixture 1 and the rail portion R is reduced, and it is possible to suppress a loss of aesthetics due to the occurrence of the gap. In addition, by reducing the gap between the lighting fixture 1 and the rail portion R, the second wall 202 and the side surface R4 of the rail portion R appear to be formed by a continuous surface, so that it is possible to enhance the sense of unity in appearance between the lighting fixture 1 and the rail portion R.

[0228] Furthermore, since the lighting fixture 1 and the rail portion R are rectangular parallelepipeds, the shapes of the lighting fixture 1 and the rail portion R are unified. Furthermore, the extending direction of the lighting fixture 1 and the extending direction of the rail portion R are unified. Furthermore, the length of the lighting fixture 1 in the second direction PD2 and the length of the rail portion R are unified. In other words, when the lighting fixture 1 is attached to the rail portion R, the sense of unity between the lighting fixture 1 and the rail portion R is improved. As a result, the sense of discomfort felt by the user when the lighting fixture 1 is attached to the rail portion R can be reduced.

[0229] Next, the lighting fixture 1 of the third embodiment will be described in more detail with reference to Fig. 25. Fig. 25 is a diagram showing a rail portion R having a finisher RF. As shown in Fig. 25, the rail portion R may include a finisher RF. The finisher RF closes the end of the rail portion R in the first direction PD1.

[0230] The plug portion 100 of the lighting fixture 1 of the third embodiment is disposed at a predetermined distance from the second blocking member 23 in the first direction PD1. The predetermined distance is longer than the length of the finisher RF in the first direction PD1. Specifically, the predetermined distance is the sum of the length of the finisher RF in the first direction PD1 and the length of a part of the rail portion R in the first direction PD1. That is, as shown in FIG. 25, the lighting fixture 1 can be attached to the rail portion R so that the end of the lighting fixture 1 and the end of the finisher RF are flush with each other. Therefore, the sum of the length of the rail portion R and the length of the finisher RF is approximately equal to the length of the lighting fixture 1. As a result, the sense of unity between the rail portion R, the finisher RF, and the lighting fixture 1 can be improved. Therefore, the sense of discomfort felt by the user can be reduced.

[0231] The embodiments of the present invention have been described above with reference to the drawings. However, the present invention is not limited to the above embodiments, and can be implemented in various aspects without departing from the gist of the present invention. In addition, various inventions can be formed by appropriately combining multiple components disclosed in each of the above embodiments. For example, some components may be deleted from all components shown in the embodiments. Furthermore, components across different embodiments may be appropriately combined. The drawings are mainly shown schematically for ease of understanding, and the thickness, length, number, spacing, etc. of each component shown in the drawings are different from the actual ones due to the convenience of drawing. In addition, the speed, material, shape, dimensions, etc. of each component shown in the above embodiments are examples and are not particularly limited, and various changes are possible within a range that does not substantially deviate from the configuration of the present invention.

[0232] (1) In the first embodiment, one of the pair of plug parts 100 has the relay terminal part 181, but this is not limited to the above. Each of the pair of plug parts 100 may have the relay terminal part 181. When each of the pair of plug parts 100 has the relay terminal part 181, the lighting device 1 includes the pair of plug parts 100, a plurality of power supply parts 15 corresponding to each of the pair of plug parts 100, and a plurality of light source parts 7 corresponding to each of the plurality of power supply parts 15.

[0233] For example, in the case of a lighting device 1 capable of color adjustment control, one of the pair of plug units 100 supplies power to a first power supply unit. The first power supply unit supplies power to a first light source unit that emits light of a first light color. The other of the pair of plug units 100 supplies power to a second power supply unit. The second power supply unit supplies power to a second light source unit that emits light of a second light color different from the first light color.

[0234] Also, for example, in the case of a lighting device 1 in which the control contents executed by each of the multiple power supply units 15 are different, one plug unit 100 of the pair of plug units 100 supplies power to a first power supply unit. The first power supply unit corresponds to, for example, PWM (Pulse Width Modulation) control. Also, the other plug unit 100 of the pair of plug units 100 supplies power to a second power supply unit. The second power supply unit corresponds to, for example, DALI (Digital Addressable Lighting Interface) control. DALI (registered trademark) control is a control standard for lighting devices.

[0235] Furthermore, the number of plug units 100 having relay terminal units 181 is not limited to two, and lighting device 1 may have three or more plug units 100. In other words, lighting device 1 may have a plurality of plug units 100, a plurality of power supply units 15 corresponding to the number of plug units 100, and a plurality of light source units 7 corresponding to the number of power supply units 15.

[0236] The lighting fixture 1 described in the first to third embodiments may have a pattern similar to that of the rail portion R. Furthermore, the lighting fixture 1 and the rail portion R may have the same color. By making the lighting fixture 1 and the rail portion R have the same pattern and color, the sense of unity between the lighting fixture 1 and the rail portion R is further improved.

[0237] In the lighting fixture 1 described in the first to third embodiments, the first unit U1 is attached to the second unit U2 by the attachment member 19 with a screw, but this is not limited thereto. For example, the attachment member 19 may have an elastic portion such as a leaf spring. The elastic portion has a pair of attachment portions. The pair of attachment portions face each other. One of the pair of attachment portions is biased, for example, toward the second wall 202A. The other of the pair of attachment portions is biased, for example, toward the second wall 202B. Therefore, when the first unit U1 is accommodated in the accommodation portion 21 of the second unit U2, the attachment member 19 abuts against the second wall 202A and the second wall 202B. This allows the first unit U1 to be attached to the second unit U2.

[0238] [Appendix 1] The lighting device according to the present invention includes a base member, a light source unit, a power supply unit, a plug unit, and a storage unit. The base member preferably has a first main surface and a second main surface that face each other. The light source unit is preferably disposed on the first main surface and emits light. The power supply unit preferably supplies power to the light source unit based on external power from an external power supply. The plug unit is preferably connected to a rail unit to supply the external power to the power supply unit. The storage unit preferably stores the base member, the power supply unit, and a specific portion of the plug unit. The power supply unit preferably faces the second main surface. The specific portion preferably faces the second main surface at a position different from the position of the second main surface where the power supply unit faces, and preferably overlaps with the first main surface in a direction intersecting the base member at a position of the first main surface where the light source unit is disposed.

[0239] The plug portion according to the present invention further includes a connecting portion and a switching portion. The connecting portion is preferably connected to the rail portion. The switching portion preferably switches the connection state of the connecting portion with respect to the rail portion. The accommodating portion preferably further includes a first wall, a second wall, and a through portion. The first wall is preferably opposed to the rail portion. The second wall is preferably extended in a direction from the first wall toward the base member. The through portion preferably penetrates from a part of the first wall to a part of the second wall between the inside of the accommodating portion and the outside of the accommodating portion.

[0240] The switching portion according to the present invention switches between a first state and a second state. In the first state, it is preferable that the rail portion and the connecting portion are not connected. In the second state, it is preferable that the rail portion and the connecting portion are connected. When switching to the first state, it is preferable that the switching portion protrudes from the through-hole. When switching to the second state, it is preferable that the switching portion is housed in the through-hole.

[0241] The plug unit according to the present invention further includes a relay terminal unit. The relay terminal unit preferably relays the external power to the power supply unit. The relay terminal unit preferably does not relay the external power to the power supply unit in the first state, and preferably relays the external power to the power supply unit in the second state.

[0242] The plug portion according to the present invention further includes a first restricting portion. The first restricting portion preferably restricts rotation of the switching portion that rotates in a first rotation direction. The first rotation direction preferably indicates a direction in which the switching portion rotates about a rotation axis and the coupling portion changes from the second state to the first state.

[0243] The plug portion according to the present invention further includes a second restricting portion. The second restricting portion preferably restricts rotation of the switching portion in a second rotation direction. The second rotation direction preferably indicates a direction in which the switching portion rotates about the rotation axis and the connecting portion changes from the first state to the second state.

[0244] The plug portion according to the present invention further includes a first engagement portion. It is preferable that the switching portion includes the second engagement portion that engages with the first engagement portion. It is preferable that the first engagement portion is disposed at a position where the rail portion and the connecting portion are in the first state, or at a position where the rail portion and the connecting portion are in the second state.

[0245] The first engaging portion according to the present invention is preferably an engaging protrusion, the second engaging portion is preferably an engaging recess, and the size of the engaging recess is preferably larger than the size of the engaging protrusion.

[0246] The first engagement portion according to the present invention includes a first engagement protrusion and a second engagement protrusion. The second engagement protrusion is preferably disposed at a position different from that of the first engagement protrusion. The first engagement protrusion is preferably engaged with the engagement recess when the rotation of the switching portion is restricted by the first restriction portion. The second engagement protrusion is preferably engaged with the engagement recess when the rotation of the switching portion is restricted by the second restriction portion.

[0247] The plug portion according to the present invention further includes a conductive portion. The conductive portion relays the external power to the relay terminal portion and transmits the external power to the power supply portion. The housing portion extends along a direction in which the base member extends. It is preferable that the conductive portion is disposed in the same direction as the housing portion extends.

[0248] [Appendix 2] A first aspect of the present disclosure includes an elongated base member having a first main surface and a second main surface facing each other and extending in a first direction, a light source unit disposed on the first main surface and emitting light, a power supply unit supplying power to the light source unit based on external power from an external power supply, a plug unit supplying the external power to the power supply unit by being connected to a rail unit, and an accommodating unit extending in the first direction and accommodating the base member, the power supply unit, and a specific portion of the plug unit, wherein the power supply unit faces the second main surface, and the specific portion is a position of the second main surface different from the position to which the power supply unit faces. the accommodating section faces the second main surface at a position where the light source section is disposed and overlaps the first main surface in a direction intersecting the base member at a position on the first main surface where the light source section is disposed, the accommodating section has a first wall facing the rail section, a second wall extending from the first wall in a direction toward the base member, and a penetration section having a through hole penetrating the inside of the accommodating section and the outside of the accommodating section from a part of the first wall to a part of the second wall, and the plug section is disposed in the penetration section at a position away from the end of the accommodating section in the first direction.

[0249] A second aspect of the present disclosure is a lighting fixture in the first aspect, wherein the plug portion further includes a connecting portion connected to the rail portion and a switching portion for switching the connection state of the connecting portion relative to the rail portion, the connecting portion being located on the side of the first wall and the switching portion being located on the side of the second wall.

[0250] Aspect 3 of the present disclosure is a lighting fixture in aspect 2, wherein the switching portion switches between a first state in which the rail portion and the connecting portion are not connected and a second state in which the rail portion and the connecting portion are connected, and when switching to the first state, the switching portion protrudes from the through-portion, and when switching to the second state, the switching portion is housed in the through-portion.

[0251] A fourth aspect of the present disclosure is a lighting device in the third aspect, wherein the plug portion further includes a first regulating portion that regulates rotation of the switching portion which rotates in a first rotation direction, the first rotation direction indicating the direction in which the switching portion rotates around a rotation axis to change from the second state to the first state.

[0252] A fifth aspect of the present disclosure is a lighting device in the fourth aspect, wherein the plug portion further includes a second regulating portion that regulates rotation of the switching portion which rotates in a second rotation direction, the second rotation direction indicating the direction in which the switching portion rotates around a rotation axis to change from the first state to the second state.

[0253] A sixth aspect of the present disclosure includes a base member having a first main surface and a second main surface facing each other, a light source unit disposed on the first main surface and emitting light, a power supply unit supplying power to the light source unit based on external power from an external power supply, a plug unit supplying the external power to the power supply unit by being connected to a rail unit, and a housing unit housing the base member, the power supply unit, and a specific portion of the plug unit, wherein the power supply unit faces the second main surface at a position on the second main surface different from the position at which the power supply unit faces, and a front the plug portion overlaps with the first main surface in a direction intersecting with the base member at a position of the first main surface where the light source portion is arranged, and the plug portion further includes a connecting portion connected to the rail portion and a switching portion that switches a connecting state of the connecting portion to the rail portion, and the accommodating portion further includes a first wall facing the rail portion, a second wall extending from the first wall in a direction toward the base member, and a through portion that penetrates the inside of the accommodating portion and the outside of the accommodating portion from a part of the first wall to a part of the second wall, and the connecting portion is connected to the through portion. and the switching portion is disposed in the through portion and located on the side of the first wall, and the switching portion is disposed in the through portion and located on the side of the second wall, and switches between a first state in which the rail portion and the connecting portion are not connected and a second state in which the rail portion and the connecting portion are connected, and when switching to the first state, the switching portion protrudes from the through portion, and when switching to the second state, the switching portion is housed in the through portion, and the plug portion has a first restricting portion that restricts rotation of the switching portion that rotates in a first rotation direction and a second restricting portion that restricts rotation of the switching portion that rotates in a second rotation direction. the first rotation direction indicates the direction in which the switching part rotates about a rotation axis to change from the second state to the first state, and the second rotation direction indicates the direction in which the switching part rotates about a rotation axis to change from the first state to the second state, and the switching part has a second engagement part that engages with the first engagement part, and the first engagement part is positioned at a position where the rail part and the connecting part are in the first state or a position where the rail part and the connecting part are in the second state.

[0254] A seventh aspect of the present disclosure is the lighting device of the sixth aspect, wherein the first engagement portion is an engagement protrusion, the second engagement portion is an engagement recess, and the size of the engagement recess is larger than the size of the engagement protrusion.

[0255] An eighth aspect of the present disclosure is a lighting device in accordance with the seventh aspect, wherein the first engagement portion includes a first engagement protrusion and a second engagement protrusion arranged at a position different from the first engagement protrusion, and the first engagement protrusion engages with the engagement recess when the rotation of the switching portion is restricted by the first regulating portion, and the second engagement protrusion engages with the engagement recess when the rotation of the switching portion is restricted by the second regulating portion.

[0256] A ninth aspect of the present disclosure is a lighting device in any of aspects 3 to 8, wherein the plug portion further has a relay terminal portion that relays the external power to the power supply portion, and the relay terminal portion does not relay the external power to the power supply portion in the first state, and relays the external power to the power supply portion in the second state.

[0257] A tenth aspect of the present disclosure is a lighting device in the ninth aspect, wherein the plug portion further has a conductive portion that relays the external power to the relay terminal portion and transmits the external power to the power supply portion, the accommodating portion extends along the extension direction of the base member, and the conductive portion is arranged facing in the same direction as the extension direction of the accommodating portion. [Industrial Applicability]

[0258] The present invention provides a lighting fixture and has industrial applicability. [Explanation of symbols]

[0259] 1: Lighting equipment 7:Light source part 13: Base material 15: Power supply section 21: Storage unit 100: Plug section 120:Connection part 130: Switching section 138F: Second engagement portion (engagement recess) 144A: First engaging part (engaging convex part) 144B: First engagement protrusion (engagement protrusion) 144C: ​​Second engagement protrusion (engagement protrusion) 148: First Regulatory Department 160: Conductive part 181: Relay terminal section 201: 1st wall 202:Second wall 203: Penetration AX: Rotation axis B1: First main surface B2: Second main surface R: Rail section RA: First rotation direction RB: Second rotation direction SP: Specific part

Claims

1. an elongated base member having a first main surface and a second main surface opposite to the first main surface and extending in a first direction; A light source unit disposed on the first main surface and emitting light; a power supply unit that supplies power to the light source unit based on external power from an external power supply; a plug portion that is connected to the rail portion to supply the external power to the power supply portion; a housing portion extending in the first direction and housing the power supply portion and a specific portion of the plug portion; Equipped with the power supply unit faces the second main surface, the specific portion faces the second main surface at a position different from a position of the second main surface where the power supply portion faces, and overlaps the first main surface in a direction intersecting with the base member at a position of the first main surface where the light source portion is disposed, The storage section includes: A first wall facing the rail portion; A second wall extending from the first wall toward the base member; a through-hole provided between an inside of the storage portion and an outside of the storage portion from a part of the first wall to a part of the second wall; The through-hole is provided at a position spaced apart from an end of the accommodation portion in the first direction, The plug portion is disposed in the through-hole, forming a lighting fixture.

2. The plug portion is A connecting portion connected to the rail portion; A switching unit that switches a connection state of the connection portion with respect to the rail portion; Further comprising: The connecting portion is located on the first wall side, The lighting device according to claim 1 , wherein the switching portion is located on a side of the second wall.

3. The switching unit switches between a first state in which the rail portion and the connecting portion are not connected and a second state in which the rail portion and the connecting portion are connected, When switching to the first state, the switching portion protrudes from the through portion, The lighting fixture according to claim 2 , wherein when the switching portion is switched to the second state, the switching portion is housed in the through-hole.

4. The plug portion further includes a first restricting portion that restricts rotation of the switching portion that rotates in a first rotation direction, The lighting device according to claim 3 , wherein the first rotation direction indicates a direction in which the switching portion rotates about a rotation axis to change from the second state to the first state.

5. The plug portion further includes a second restricting portion that restricts rotation of the switching portion that rotates in a second rotation direction, The lighting device according to claim 4 , wherein the second rotation direction indicates a direction in which the switching portion rotates about a rotation axis to change from the first state to the second state.

Images