Lighting fixtures

Abstract

The present invention provides a lighting fixture that can prevent the lighting fixture from protruding excessively from the surface to which the rail portion is attached. [Solution] The lighting fixture 1 comprises a base member 13, a light source unit 7, a power supply unit 15, a plug unit 100, and a housing unit 21. The base member 13 has a first main surface B1 and a second main surface B2 opposite to the first main surface B1. The light source unit 7 is positioned on the first main surface B1 and emits light. The power supply unit 15 supplies power to the light source unit 7 based on external power from an external power source. The plug unit 100 supplies external power to the power supply unit 15 by being connected to a rail unit R. The housing unit 21 houses the power supply unit 15 and a specific part SP of the plug unit 100. The power supply unit 15 faces the second main surface B2. The specific part SP faces the second main surface B2 at a position different from the position where the power supply unit 15 faces the second main surface B2, and overlaps with the first main surface B1 in a direction that intersects with the base member 13 at the position where the light source unit 7 is positioned on the first main surface B1.

Description

Technical Field

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

Background Art

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

Prior Art Literature

Patent Literature

[0003]

Patent Document 1

Summary of the Invention

Problem to be Solved by the Invention

[0004] However, in the lighting device described in Patent Document 1, since the power plug overlaps with the power supply circuit, when the lighting device is attached to a rail section such as a duct rail, the lighting device excessively protrudes relative to the surface on which the rail section is mounted.

[0005] The present invention has been made in view of the above problem, and an object of the present invention is to provide a lighting fixture that can suppress excessive protrusion of the lighting fixture relative to the surface on which the rail section is mounted.

Means for Solving the Problem

[0006] The lighting fixture according to the present invention has a first main surface and a second main surface opposite to the first main surface, and comprises a long base member 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 source, a plug unit connected to a rail unit to supply the external power to the power supply unit, and a housing unit extending in the first direction and housing the power supply unit and a specific part of the plug unit, wherein the power supply unit faces the second main surface, and the specific part is located at a position on the second main surface different from the position on which the power supply unit faces the second main surface. The housing portion is located opposite the main surface and overlaps with the first main surface in a direction that intersects with the base member at the position where the light source portion of the first main surface is arranged. The housing portion has a first wall opposite the rail portion, a second wall extending from the first wall toward the base member, and a through portion having a through hole that penetrates the inside of the housing portion and the outside of the housing portion, extending from a part of the first wall toward a part of the second wall. The plug portion is located in the through portion, and a first light-shielding portion is further located in the through portion to restrict light leakage from the through hole to the outside of the housing portion. [Effects of the Invention]

[0007] According to the lighting fixture of the present invention, it is possible to suppress excessive protrusion of the lighting fixture relative to the surface to which the rail portion is attached. [Brief explanation of the drawing]

[0008] [Figure 1] This is a perspective view showing a lighting fixture according to Embodiment 1 of the present invention. [Figure 2] This figure shows the first and second units of the lighting fixture according to Embodiment 1. [Figure 3] This is a view of the second unit from the ceiling side. [Figure 4] Figure 3 is a cross-sectional view showing the IV-IV section of the lighting fixture 1 shown in Figure 3. [Figure 5] This is a magnified view of a portion of the lighting fixture 1 shown in Figure 4. [Figure 6] This figure schematically shows a cross-section of a lighting fixture according to Embodiment 1. [Figure 7] It is an enlarged view showing the plug part of the lighting fixture according to Embodiment 1. [Figure 8] It is another enlarged view showing the plug part of the lighting fixture according to Embodiment 1. [Figure 9] It is a view of the plug part seen from the second main surface side. [Figure 10] It is an exploded perspective view of the plug part according to Embodiment 1. [Figure 11] It is a perspective view showing a lighting fixture according to Embodiment 2 of the present invention. [Figure 12] It is a view of the lighting fixture of Embodiment 2 seen from the rail part side. [Figure 13] It is a view showing the XII-XII cross-section of the lighting fixture 1 shown in Fig. 12. [Figure 14] It is a view showing the plug part when in the first state of Embodiment 2. [Figure 15] It is a perspective view showing a lighting fixture according to Embodiment 3. [Figure 16] It is an exploded perspective view of the lighting fixture according to Embodiment 3. [Figure 17] It is a view schematically showing a cross-section of the lighting fixture according to Embodiment 3. [Figure 18] It is an enlarged view showing a part of the second unit of the lighting fixture of Embodiment 3. [Figure 19] It is a view of the second unit of Embodiment 3 shown in Fig. 18 seen from the ceiling surface side. [Figure 20] It is a view showing the XX-XX cross-section of the lighting fixture of Embodiment 3 shown in Fig. 18. [Figure 21] It is a view showing the plug part, the first light shielding part and the second light shielding part of Embodiment 3. [Figure 22] It is an exploded perspective view showing the plug part, the first light shielding part and the second light shielding part of Embodiment 3. [Figure 23] (a) is an enlarged view showing the first light shielding part. (b) is an enlarged view showing the second light shielding part. [Figure 24] It is a view showing the XXIV-XXIV cross-section of the lighting fixture shown in Fig. 19. [Figure 25] It is a diagram showing a rail portion having a finisher. MODE FOR CARRYING OUT THE INVENTION

[0009] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals, and repeated description thereof will be omitted. In the embodiment of the present invention, the X axis, Y axis, and Z axis are orthogonal to each other, the X axis and Y axis are parallel to a horizontal plane, and the Z axis is parallel to a vertical line.

[0010] [Embodiment 1] Referring to Fig. 1, a lighting fixture 1 according to an embodiment of the present invention will be described. Fig. 1 is a perspective view showing the lighting fixture 1 according to Embodiment 1 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 the 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 section R transmits external power from an external power source to the lighting fixture 1. The rail section R is elongated and includes a pair of transmission sections R1 (see Figure 24), a pair of recesses R2 (see Figure 24), and an opening R3. The pair of transmission sections R1 (see Figure 24), the pair of recesses R2 (see Figure 24), and the opening R3 each extend along the longitudinal direction of the rail section 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 sections R1 (see Figure 24). The rail section R is attached to a mounting section in a structure such as a building. The mounting section is, for example, the ceiling surface of a room in a building. Note that the rail section R is not limited to the ceiling surface and may be embedded in the ceiling. Specifically, the rail section R is embedded in the ceiling by attaching it 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 shows the first unit U1 and the second unit U2. Figure 3 is a view of the first unit U1 from the ceiling side.

[0015] As shown in Figure 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 interior of the cover member 3 is hollow. The cover member 3 is made of, for example, synthetic resin. The cover member 3 diffuses light. The cover member 3 is, for example, white and translucent. The cover member 3 may be formed, for example, by molding a resin containing a light-diffusing material, or by molding a transparent material and then applying a light-diffusing treatment to the surface.

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

[0018] As shown in Figure 1, the second unit U2 includes a housing section 21 and a pair of second closing members 23.

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

[0020] As shown in Figures 2 and 3, the penetration portion 203 penetrates both the inside and outside of the housing portion 21.

[0021] The pair of second closing members 23 are each fixed to a pair of longitudinal ends of the housing section 21. The pair of second closing members 23 then close a pair of longitudinal open ends 24 of the housing section 21. The pair of second closing members 23 may be integrally molded with the housing section 21.

[0022] Furthermore, in this embodiment, the shapes of the second unit U2, the first unit U1, and the rail section R are approximately identical. For example, if the shape of the first unit U1 is rectangular, the shape of the second unit U2 is also rectangular. The rail section R is also rectangular. The first unit U1 and the second unit U2 extend along the first direction PD1, and the rail section R also extends along the first direction PD1. Moreover, 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 section R in the second direction PD2 are approximately identical. The second direction PD2 is perpendicular to the first direction PD1. Therefore, the shapes of the first unit U1, the second unit U2, and the rail section R are unified. Furthermore, the direction in which the first unit U1 extends, the direction in which the second unit U2 extends, and the direction in which the rail section R extends are unified. Furthermore, the lengths of the first unit U1, the second unit U2, and the rail section R in the second direction PD2 are unified. In other words, when the lighting fixture 1 is attached to the rail section R, the sense of unity between the lighting fixture 1 and the rail section R is improved. As a result, the user can feel less discomfort when the lighting fixture 1 is attached to the rail section R.

[0023] Next, the first unit U1 and the second unit U2 will be explained in more detail with reference to Figures 1 to 6.

[0024] Figure 4 is a cross-sectional view showing the IV-IV section of the lighting fixture 1 shown in Figure 3. Figure 5 is an enlarged view of a part of the lighting fixture 1 shown in Figure 4. Figure 6 is a schematic view of the cross-section of the lighting fixture 1. As shown in Figures 4 and 6, the first unit U1 includes a light source unit 7, a base member 13, a power supply unit 15, and a mounting member 19.

[0025] As shown in Figure 4, the mounting member 19 attaches the first unit U1 to the second unit U2. Specifically, the mounting member 19 attaches the first unit U1 to the first wall 201 of the housing 21. For example, the mounting member 19 is made of metal (e.g., stainless steel). The first unit U1 may have multiple mounting members 19. The multiple 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. In other words, the light emitted by the light source unit 7 is diffused by the cover member 3.

[0027] As shown in Figure 5, the substrate 9 has a mounting surface A1 and a facing surface A2 opposite to the mounting surface A1, and extends along the first direction PD1. Multiple light-emitting elements 11 are mounted on the mounting surface A1 of the substrate 9. The multiple 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 multiple 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 through the cover member 3 to the outside of the lighting fixture 1. Note that a single light-emitting element 11 may also be provided.

[0028] The base member 13 dissipates the heat generated by the light source 7 emitting light. 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 7 is attached to the base member 13. The cover member 3 is fixed to the base member 13.

[0029] Specifically, as shown in Figure 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 such that the first main surface B1 and the opposing surface A2 of the substrate 9 face each other.

[0030] As shown in Figures 4 and 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 the external power of an external power supply. The power supply unit 15 faces the second main surface B2. As shown in Figure 6, the power supply unit 15 is positioned between the plug units 100.

[0031] As shown in Figures 2 to 4, the housing section 21 of the second unit U2 extends along the first direction PD1 to which the base member 13 extends. The housing 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 section R. The second wall 202 extends in the direction toward the first unit U1 from the first wall 201. Specifically, the second wall 202 extends in the direction toward the base member 13 from the first wall 201.

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

[0033] One of the two plug sections 100 shown in Figure 6 is connected to the rail section R to supply external power to the power supply unit 15. The plug section 100 that supplies external power to the power supply unit 15 has a connecting section 120 and a conductive section 160.

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

[0035] The conductive part 160 transmits external power to the power supply unit 15. Specifically, the conductive part 160 transmits the external power relayed by the connecting part 120 to the power supply unit 15. The conductive part 160 corresponds to an example of a "specific part" of the plug part 100.

[0036] The light-shielding cover 204 restricts light from leaking out of the housing 21 through the penetration 203. The light-shielding cover 204 is positioned to correspond to the penetration 203. The size of the light-shielding cover 204 is larger than the penetration 203 and it is positioned to cover the penetration 203.

[0037] Note that the other plug section 100 of the two plug sections 100 shown in Figure 6 does not supply external power to the power supply unit 15 even when connected to the rail section R. Therefore, the other plug section 100 connects the second unit U2 to the rail section R. Note that the number of plug sections 100 is not limited to two. In other words, the lighting fixture 1 may have two or more plug sections 100. For example, the lighting fixture 1 may have three plug sections 100.

[0038] Furthermore, the housing section 21 of the second unit U2 houses the base member 13, the power supply unit 15, the mounting member 19, and the conductive part 160 of the first unit U1. In addition, the housing section 21 may also house the light source unit 7.

[0039] Next, the plug portion 100 will be described in detail with reference to Figures 1 to 6. As shown in Figures 4 and 5, a portion of the plug portion 100 is exposed, and a specific portion SP 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 where the power supply portion 15 faces the second main surface B2. Furthermore, the specific portion SP is spaced apart 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 the position where the light source portion 7 of the first main surface B1 is located.

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

[0041] Furthermore, as shown in Figures 1, 4-6, and 24, the housing section 21 houses the conductive section 160 of the connecting section 120. Therefore, the connecting section 120 can be exposed to the outside of the housing section 21. As a result, when the lighting fixture 1 is connected to the rail section R, almost the entire connecting section 120 is housed inside the rail section R, and the lighting fixture 1 can be positioned close to the rail section R.

[0042] Furthermore, since the conductive part 160 of the plug part 100 is housed in the housing part 21, the entire plug part 100 does not protrude from the second unit U2. Therefore, the gap between the lighting fixture 1 and the rail part R when the lighting fixture 1 is attached to the rail part R can be reduced. As a result, the gap between the lighting fixture 1 and the rail part R becomes smaller, and the reduction in aesthetics caused by the gap can be suppressed. Moreover, as shown in Figure 1, the smaller gap between the lighting fixture 1 and the rail part R enhances the sense of unity in appearance between the lighting fixture 1 and the rail part R. Specifically, because the gap between the lighting fixture 1 and the rail part R becomes smaller, the second wall 202 and the side surface R4 of the rail part R shown in Figure 1 appear to be composed of a continuous surface, thus enhancing the sense of unity in appearance between the lighting fixture 1 and the rail part R.

[0043] Furthermore, by reducing the gap between the lighting fixture 1 and the rail section R, dust accumulation on the first wall 201 of the lighting fixture 1 can be suppressed. As a result, the effort required to clean the lighting fixture 1 can be reduced.

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

[0045] Furthermore, the plug section 100 and the power supply section 15 are positioned between the first wall 201 and the second main surface B2. In other words, since the plug section 100, the power supply section 15 and the first wall 201 are positioned on the second main surface B2 side, the plug section 100 and the power supply section 15 do not protrude towards the light-emitting surface side of the light source section 7. Therefore, the plug section 100 and the power supply section 15 do not protrude towards the cover member 3 side. Consequently, the reduction in the space available for positioning the light source section 7 due to the plug section 100 and the power supply section 15 can be suppressed. As a result, the degree of freedom in positioning the light source section 7 on the first main surface B1 side is improved.

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

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

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

[0049] Furthermore, the plug portion 100 is located in the through portion 203. The through portion 203, where the plug portion 100 is located, penetrates from a part of the first wall 201 to a part of the second wall 202, passing through the inside and outside of the housing portion 21. Specifically, the connecting portion 120 is located in the through portion 203 and is situated on the side of the first wall 201. The switching portion 130 is located in the through portion 203 and is situated on the side of the second wall 202. In other words, the connecting portion 120 is located on the first wall 201, which faces the rail portion R, and the switching portion 130 is located on the side of the second wall 202, which does not face the rail portion R. Therefore, the switching portion 130 can be operated even when the lighting fixture 1 is attached to the rail portion R. As a result, the convenience of operating the switching portion 130 is improved.

[0050] Furthermore, the switching unit 130 is rotatable around the pivot axis AX. Specifically, the switching unit 130 rotates in a first rotation direction RA around the pivot 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. The switching unit 130 also rotates in a second rotation direction RB around the pivot 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 switching the connection state of the rail section R from the second state to the first state, the switching section 130 protrudes from the through section 203, as shown in Figure 7. When switching the connection state of the rail section R from the first state to the second state, the switching section 130 is housed in the through section 203, as shown in Figure 8. Therefore, when the switching section 130 is housed in the through section 203, the user can know that the rail section R and the lighting fixture 1 are connected. On the other hand, when the switching section 130 is not housed in the through section 203, the user can know that the rail section R and the lighting fixture 1 are not connected. In other words, the user can determine whether or not the lighting fixture 1 is attached to the rail section R by visually checking the state of the switching section 130. As a result, the user can easily determine the attachment state of the lighting fixture 1 and the rail section R. Furthermore, for example, it becomes unnecessary to attach a sign to the lighting fixture 1 indicating that the switching section 130 is in the first state. Also, it becomes unnecessary to attach a sign to the lighting fixture 1 indicating that the switching section 130 is in the second state.

[0052] Furthermore, when the lighting fixture 1 is attached to the rail section R, the switching section 130 is housed in the through section 203. Therefore, when a user views the lighting fixture 1 from the cover member 3 side, the switching section 130 is not easily visible to the user. Consequently, the number of protruding parts from the lighting fixture 1 is reduced, resulting in a simpler appearance for the lighting fixture 1. As a result, the aesthetic appeal of the lighting fixture 1 is improved.

[0053] Furthermore, multiple through-holes 203 may be arranged in the housing section 21. When multiple through-holes 203 are arranged in the housing section 21, each of the multiple through-holes 203 penetrates one of the pair of second walls 202. In other words, each of the multiple through-holes 203 penetrates from a part of the first wall 201 to a part of one of the second walls 202. Therefore, when a plug section 100 is placed in each of the multiple through-holes 203, the switching section 130 of the plug section 100 is located on the side of one of the second walls 202. In other words, the switching section 130 is not located on the side of the other second wall 202. Thus, it is no longer necessary to operate the switching section 130 from multiple directions relative to the lighting fixture 1, and multiple switching sections 130 can be operated from one direction. As a result, the work efficiency is improved when attaching the lighting fixture 1 to the rail section R or when removing the lighting fixture 1 from the rail section R.

[0054] Furthermore, multiple lighting fixtures 1 may be connected to the rail section R. In this embodiment, since the switching section 130 is located on one of the second walls 202, the distance between lighting fixtures 1 can be reduced. In other words, multiple lighting fixtures 1 can be attached to the rail section R in a continuous manner, and a continuous linear light can be emitted when lit. Also, even if the distance between lighting fixtures 1 is reduced, the switching sections 130 of adjacent lighting fixtures 1 are spaced apart, so when operating each switching section 130, it does not interfere with the operation of the switching section 130.

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

[0056] Next, the plug section 100 will be described in detail with reference to Figures 7 and 8. The plug section 100 has a plug base section 140. The plug base section 140 has a connecting section 120, a switching section 130, and a conductive section 160 attached to it. The plug base section 140 has a main body section 141. The main body section 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 section R. The first support plate 142 faces the rail section R at a closer position than the second support plate 144. The first support plate 142 supports the switching section 130. The first support plate 142 is approximately parallel to the first wall 201. The first support plate 142 positioned in the penetration section 203 blocks a portion of the penetration section 203.

[0058] The second support plate 144 faces the rail section R. The second support plate 144 faces the rail section R at a position further away from 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 penetration section 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 covers the portion of the penetration 203 that is different from the portion covered by the first support plate 142 and the portion covered by the second support plate 144. A portion 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 that intersects with the second wall 202. Specifically, the second rising wall 147 extends in a direction that is approximately perpendicular to the second wall 202. The second rising wall 147 blocks the portion of the penetration 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 section 148. The first restricting section 148 restricts the rotation of the switching section 130. Specifically, the first restricting section 148 restricts the rotation of the switching section 130, which rotates in the first rotation direction RA when the connecting section 120 is in the first state. Therefore, the switching section 130 does not rotate beyond the first restricting section 148. In other words, the rotation of the switching section 130 can be restricted when the connecting section 120 is in the first state. As a result, even though the connecting section 120 is in the first state, it is possible to prevent the connecting section 120 from rotating further and entering the second state.

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

[0063] The bolt holder 110 holds a bolt (not shown). As shown in Figures 9 and 10, the bolt holder 110 can be combined with the connecting part 120, the switching part 130, the terminal support part 150, and the nut holder 170. Specifically, the bolt holder 110 can be combined with the connecting part 120. The bolt holder 110 connected to the connecting part 120 can be combined with the switching part 130. The bolt holder 110 connected to the connecting part 120 and the switching part 130 can be combined with the terminal support part 150. The bolt holder 110 connected to the connecting part 120, the switching part 130, and the terminal support part 150 can be combined with the nut holder 170. The connecting part 120, the switching part 130, the terminal support part 150, and the nut holder 170, when combined with the nut holder 170, rotate around the pivot axis AX shown in Figure 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 extends from the head 101 to the shaft 102. A screw is inserted through the through hole 103.

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

[0067] The head portion 101 has a pair of first grooves 104. Each of the pair of first grooves 104 holds the relay terminal portion 181. The pair of first grooves 104 are located on the side of the connecting portion 120. The width of the first grooves 104 is greater than the width of the first contact piece 181A. Therefore, the first contact piece 181A can be placed in each of the pair of first grooves 104. The first grooves 104 prevent the first contact piece 181A from falling out of 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 rectangular tube portion 105 protrudes outward from the center of the shaft portion 102. The outer shape of the rectangular tube portion 105 is approximately rectangular. The outer shape of the rectangular tube portion 105 may also be cross-shaped. The outer diameter of the rectangular tube portion 105 is larger than the outer diameter of the cylindrical portion 106. The rectangular 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 the relay terminal portion 181, which will be described later. Each of the pair of support bases 105A also presses the relay terminal portion 181 outward from the center of the shaft portion 102.

[0071] The cylindrical portion 106 is in contact with 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 intermediate 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 terminals 181 contacts a pair of transmission units R1 (see Figure 24) and relays external power to the conductive unit 160. In the first state, the relay terminals 181 do not relay external power to the conductive unit 160. In the second state, the relay terminals 181 relay external power to the conductive unit 160. In other words, when relaying external power to the conductive unit 160, external power is supplied to the power supply unit 15. Also, when not relaying external power to the conductive unit 160, external power is not supplied to the power supply unit 15. Therefore, with a single operation of the switching unit 130, power can be supplied to the power supply unit 15 and the lighting fixture 1 can be attached to the rail unit R. Furthermore, with a single operation of the switching unit 130, the power supplied to the power supply unit 15 can be cut off and the lighting fixture 1 can be removed from the rail unit R. As a result, the effort required when attaching the lighting fixture 1 to the rail unit R and when removing the lighting fixture 1 from the rail unit R can be reduced.

[0074] A pair of relay terminal sections 181 are held by the connecting section 120. Each of the pair of relay terminal sections 181 is L-shaped. Each of the pair of relay terminal sections 181 has a first contact piece 181A, an intermediate piece 181B, and a second contact piece 181C.

[0075] The first contact piece 181A is capable of contacting the transmission portion R1 of the rail portion R (see Figure 24). The first contact piece 181A is exposed from the housing 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 housed in the housing 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 relay terminal portion 181 is positioned between the first cylindrical portion 121 and the head 101. In other words, the first cylindrical portion 121 is positioned so that the first contact piece 181A and the connecting piece 126 are separated. 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, for example, to the distance from the recess R2 (see Figure 24) of the rail portion R to the transmission portion R1 (see Figure 24).

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

[0078] The pair of connecting pieces 126 can be connected to the recess R2 of the rail section R (see Figure 24). Each of the pair of connecting pieces 126 protrudes outward from the center of the first hole 123. Specifically, the connecting pieces 126 protrude in the direction in which the first contact piece 181A extends. The connecting pieces 126 are, for example, rectangular in shape.

[0079] The second cylindrical portion 122 is in contact with 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 separates the switching portion 130 from the connecting piece 126. As a result, the connecting piece 126 can be rotated even if there is an obstacle between the switching portion 130 and the connecting piece 126.

[0080] The second cylindrical portion 122 has a locking projection 124. The locking projection 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, roughly rectangular. Specifically, for example, the shape of the first hole 123 is cross-shaped. The bolt holding portion 110 is inserted through the first hole 123. Specifically, the rectangular tube portion 105 is inserted through the first hole 123. Because the roughly rectangular rectangular tube portion 105 is inserted through the roughly rectangular first hole 123, the bolt holding portion 110 does not rotate inside the first hole 123. The connecting portion 120 and the bolt holding portion 110 are then combined.

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

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

[0084] The presence of the third cylindrical portion 131 allows the connecting portion 120 to be positioned beyond any obstacles protruding from the rail portion R toward the second unit U2. These obstacles are, for example, polarity ribs. Polarity ribs serve as markers to prevent incorrect polarity installation when attaching the lighting fixture 1 to the rail portion R. Without the third cylindrical portion 131, the connecting portion may collide with the polarity ribs, preventing rotation. In other words, the polarity ribs may hinder the connection between the connecting portion and the rail portion R. Furthermore, the polarity ribs may cause the lighting fixture 1 to be tilted relative to the rail portion R. However, the presence of the third cylindrical portion 131 allows the connecting portion 120 to be positioned beyond the polarity ribs. As a result, the obstruction of rotation of the connecting portion 120 by the polarity ribs is reduced. Moreover, it is possible to prevent the lighting fixture 1 from being positioned in a tilted position relative to the rail portion R. It is preferable that the height of the extended third cylindrical portion 131 is greater than the height of the polarity ribs.

[0085] Furthermore, when the lighting fixture 1 is placed at the end of the rail section R, the closing member that closes 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 part. In other words, the closing member of the rail section R and the connecting part may collide, preventing the connecting part from rotating. However, by having the third cylindrical part 131, the connecting part 120 can be positioned beyond the interfering portion of the closing member of the rail section R. As a result, the obstruction of the rotation of the connecting part 120 by the closing member of the rail section R can be reduced. In addition, 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 on the third cylindrical portion 131 at predetermined angle intervals. The predetermined angle is, for example, 90 degrees. The locking recesses 137 are locked onto the locking projections 124 of the second cylindrical portion 122. Therefore, the locking recesses 137 define the position for attaching the connecting portion 120 to the switching portion 130. As a result, it is possible to prevent attaching the connecting portion 120 to the switching portion 130 in the wrong 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 section 138 extends from the fourth cylindrical section 136. The operating section 138 is a rectangular plate shape. The operating section 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 section 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 engaging portion 138F. The second engaging portion 138F is an engaging recess. The second engaging portion 138F will be described later.

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

[0092] The fourth face 138D is the face opposite the third face 138C and is located between the first face 138A and the second face 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 the direction toward the pivot axis AX from the fourth surface 138D. Therefore, a finger can be placed on the inclined fifth surface 138E. As a result, it is possible to prevent a finger placed on the fifth surface 138E from slipping off the fifth surface 138E when rotating the operating part 138.

[0094] Furthermore, the fifth surface 138E has a groove 139 that extends from the first surface 138A towards the second surface 138B. Therefore, a fingernail can be gripped into the groove 139 of the inclined fifth surface 138E. As a result, the finger placed on the operating part 138 is less likely to slip, and the operating part 138 can be easily rotated.

[0095] The second hole 133 penetrates from the third cylindrical portion 131 to the fourth cylindrical portion 136. The shape of the second hole 133 is, for example, roughly rectangular. Specifically, for example, the shape of the second hole 133 is cross-shaped. The rectangular tube portion 105 is inserted through the second hole 133. Because the roughly rectangular rectangular tube portion 105 is inserted through the roughly rectangular second hole 133, the bolt holding portion 110 does not rotate inside the second hole 133. The connecting portion 120, the bolt holding portion 110, and the switching portion 130 are then combined.

[0096] The second hole 133 has a pair of fourth grooves 135. The pair of fourth grooves 135 are arranged from the third cylindrical portion 131 to the fourth cylindrical portion 136. The fourth grooves 135 are continuous with the third groove 127. In other words, the fourth grooves 135 are continuous with the second groove 125 and the third groove 127. When the rectangular tube portion 105 is inserted through the second hole 133, the support base 105A and the pair of fourth grooves 135 face each other. Therefore, the intermediate piece 181B is held between the support base 105A and the pair of fourth grooves 135. As a result, the relay terminal portion 181 can be prevented from falling out of the switching portion 130.

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

[0098] The third support plate 143 faces the rail section R. The third support plate 143 faces the rail section R at a position further away than the first support plate 142. The third support plate 143 faces the rail section R at a position closer than the second support plate 144. Also, the third support plate 143 faces the third cylindrical section 131. The third support plate 143 is in contact with the fourth cylindrical section 136.

[0099] The third support plate 143 has a through hole 143A. The through hole 143A connects the outside of the plug base portion 140 to the inside of the plug base portion 140. In other words, the through hole 143A connects the outside of the housing portion 21 to the inside of the housing portion 21. The relay terminal portion 181 is inserted through the through hole 143A. Specifically, the second contact piece 181C of the relay terminal portion 181 is inserted through the through hole 143A. That is, the second contact piece 181C inserted through the through hole 143A is located inside the housing 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 parts 149 attach the plug part 100 to the second unit U2. Specifically, the pair of mounting parts 149 fix the plug part 100 to the through part 203. The pair of mounting parts 149 are connected to the first support plate 142.

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

[0103] Furthermore, the second support plate 144 has a first engaging portion 144A. The first engaging portion 144A is positioned at the location where the connecting portion 120 is in a first state, or at the location where the connecting portion 120 is in a second state. The first engaging portion 144A engages with the second engaging portion 138F. As a result, it is possible to inform the user that the connection state changes at the position where the first engaging portion 144A and the second engaging portion 138F engage.

[0104] The first engaging portion 144A is an engaging projection. The size of the engaging projection of the first engaging portion 144A is smaller than the size of the engaging recess of the second engaging portion 138F. In other words, the size of the engaging recess of the second engaging portion 138F is larger than the size of the engaging projection of the first engaging portion 144A. Therefore, a gap is created between the engaging recess of the second engaging portion 138F and the engaging projection of the first engaging portion 144A. In other words, there is play between the engaging recess of the second engaging portion 138F and the engaging projection of the first engaging portion 144A. This means that when operating the switching portion 130, the switching portion 130 can easily move until the engaging recess of the second engaging portion 138F contacts the engaging projection of the first engaging portion 144A. Therefore, the switching portion 130 can be moved within the range of the gap, allowing the user's fingers to grip the switching portion 130. Consequently, the switching portion 130 can be changed to a position that makes it easy to rotate. As a result, the operation of the switching portion 130 becomes easier. Furthermore, compared to the case where the user places their fingers on the switching part 130 without moving the switching part 130, the range over which the user can place their fingers on the switching part 130 increases, allowing the switching part 130 to be rotated with less force.

[0105] The first engaging portion 144A includes a first engaging projection 144B and a second engaging projection 144C. The first engaging projection 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 projection 144B engages with the engaging recess of the second engaging portion 138F. The second engaging projection 144C is positioned on the second support plate 144 at a different position from where the first engaging projection 144B is positioned. The second engaging projection 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 projection 144C engages with the engaging recess of the second engaging portion 138F. Therefore, when the first engaging projection 144B engages with the engaging recess of the second engaging portion 138F, the user is made aware that the connecting portion 120 has entered the first state. Similarly, when the second engaging projection 144C engages with the engaging recess of the second engaging portion 138F, the user is made aware that the connecting portion 120 has entered the second state. As a result, the user can easily recognize how far the switching portion 130 needs to be moved to change the connection state.

[0106] As shown in Figure 10, the first engaging projection 144B is positioned between the first rising wall 145 and the second rising wall 147. Also, as shown in Figures 7 and 10, the second engaging projection 144C is positioned where the first rising wall 145 and the second rising wall 147 do not face each other.

[0107] The terminal support portion 150 has a main body portion 151 and a through hole 152. The main body portion 151 has a protruding portion 151A and a pair of fifth groove portions 153. The protruding portion 151A protrudes toward the switching portion 130. The shape of the protruding portion 151A is, for example, roughly rectangular. Specifically, for example, the shape of the protruding portion 151A is cross-shaped. The protruding portion 151A is inserted through the second hole portion 133. Because the roughly rectangular protruding portion 151A is inserted through the roughly rectangular second hole portion 133, the switching portion 130 and the terminal support portion 150 are combined. In other words, the connecting portion 120, the bolt holding portion 110, the switching portion 130 and the terminal support portion 150 are combined.

[0108] The pair of fifth grooves 153 are arranged in the direction in which the through hole 152 extends. The fifth grooves 153 hold the second contact piece 181C of the intermediate terminal portion 181. As a result, it is possible to prevent the intermediate terminal portion 181 from falling off the terminal support portion 150.

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

[0110] As shown in Figures 8 and 9, the direction in which the conductive part 160 is positioned can be predetermined when attaching it to the plug base part 140. In this embodiment, the conductive part 160 is positioned in the same direction as the first direction PD1 in which the housing part 21 extends. Therefore, the conductive part 160 can be positioned in the direction that widens the internal space of the housing part 21. As a result, the plug part 100 can be attached to the second unit U2 even if the length of the housing part 21 on the second direction PD2 side is shorter than the length of the housing part 21 on the first direction PD1 side.

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

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

[0113] A pair of conductive terminals 182 are held in 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 contact the second contact piece 181C. Specifically, as shown in Figure 8, when the rail portion R and the connecting portion 120 are connected in a second state, the first contact portion 182A contacts the second contact piece 181C. In other words, the external power relayed by the relay terminal portion 181 is transmitted to the conductive terminals 182. Therefore, the external power from the external power supply can be supplied to the power supply unit 15.

[0114] The second contact portion 182B is connected to the power line (not shown) of the power supply unit 15. The second contact portion 182B is located outside the main body 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 side walls 161B. A through hole 163 is provided in the bottom wall 161A. The side walls 161B extend from the bottom wall 161A toward the plug base 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. The second contact portion 182B of the conductive terminal 182 is inserted through the first slit 162A. The first contact portion 182A of the conductive terminal 182 is inserted through 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 with 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] Furthermore, the other plug section 100, which does not supply external power to the power supply unit 15, does not have, for example, an intermediate terminal section 181. Therefore, the plug section 100 with the intermediate terminal section 181 and the other plug section 100 without the intermediate terminal section 181 share the same components, excluding the intermediate terminal section 181. As a result, the manufacturing cost when producing the plug section 100 can be reduced. It should be noted that the other plug section 100 does not have an intermediate terminal section 181, but this is not limited to that. For example, the other plug section 100 does not need to have a conductive terminal 182. In other words, the other plug section 100 only needs to be in a state where it does not supply power to the power supply unit 15.

[0119] [Embodiment 2] Next, the lighting fixture 1 of Embodiment 2 will be described with reference to Figures 10 to 14. The lighting fixture 1 of Embodiment 2 differs in shape from the lighting fixture 1 of Embodiment 1. Below, the differences between Embodiment 2 and Embodiment 1 will be described, and the explanation of parts that overlap with Embodiment 1 will be omitted.

[0120] The lighting fixture 1 of Embodiment 2 will be described with reference to Figures 11, 12, and 13. Figure 11 is a perspective view showing the lighting fixture 1 according to Embodiment 2 of the present invention. Figure 12 is a view of the lighting fixture 1 of Embodiment 2 from the rail section R side. In Figure 12, the rail section R and the lighting fixture 1 are connected in a second state. In Figure 12, the rail section R is omitted for the sake of understanding the invention. Figure 13 is a view of the XII-XII cross section of the lighting fixture 1 shown in Figure 12.

[0121] The lighting fixture 1 extends along the first direction PD1 and the second direction PD2. The lighting fixture 1 comprises a first unit U1 and a second unit U2. In addition, the lighting fixture 1 of Embodiment 2 is connected to the rail section R by a plug section 100.

[0122] Furthermore, 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 also rectangular. In addition, 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. Moreover, the direction in which the first unit U1 extends and the direction in which the second unit U2 extends are unified. As a result, the sense of unity of the lighting fixture 1 is improved.

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

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

[0125] Each of the pair of through-holes 203 in Embodiment 2 penetrates the inside and outside of the housing 21, extending along the second direction PD2, through a portion of the second wall 202 and a portion of the first wall 201.

[0126] Each of the pair of plug portions 100 is positioned within the pair of through portions 203. In other words, the position of the plug portion 100 in Embodiment 2 differs by 90 degrees from the position of the plug portion 100 in Embodiment 1.

[0127] The plug portion 100 includes 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] As shown in Figure 13, the connecting 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 where the power supply portion 15 faces the second main surface B2. Furthermore, the conductive portion 160 overlaps the first main surface B1 in a direction that intersects with the base member 13 at the position where the light source portion 7 is located on the first main surface B1.

[0129] Therefore, in the lighting fixture 1 according to Embodiment 2, the plug portion 100 and the power supply portion 15 can be positioned at different locations on the second main surface B2. In other words, the plug portion 100 and the power supply portion 15 do not overlap. Thus, the vertical thickness of the lighting fixture 1 does not increase due to overlapping of the plug portion 100 and the power supply portion 15. As a result, when the lighting fixture 1 is attached to the rail portion R, it is possible to suppress the lighting fixture 1 from protruding excessively from the surface to which the rail portion R is attached.

[0130] The adjustment plate 206 adjusts the bias of the lighting fixture 1. The adjustment plate 206 is attached to the first wall 201. For example, if the components constituting the lighting fixture 1 are unevenly arranged inside the lighting fixture 1, the lighting fixture 1 attached to the rail section R may tilt in accordance with the bias of the components. In other words, the lighting fixture 1 may be tilted relative to the rail section R. In short, the adjustment plate 206 is attached to the first wall 201 when there is a bias in the components of the lighting fixture 1. For example, the adjustment plate 206 is positioned on the opposite side from the power supply unit 15. For example, the power supply unit 15 is positioned on the side of the first installation direction D1 with respect to the center line A passing through the center of the pair of plug sections 100. On the other hand, the adjustment plate 206 is positioned on the side of the second installation direction D2 with respect to the center line A. The first installation direction D1 indicates the direction from the adjustment plate 206 toward 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, the adjustment plate 206 can prevent the lighting fixture 1 from tilting relative to the rail section R when it is attached to the rail section R.

[0131] Furthermore, the adjustment plate 206 has multiple holes 205. Screws B are placed in the multiple holes 205. The screws B are located between the adjustment plate 206 and the rail section R. Therefore, the range in which the lighting fixture 1 is tilted relative to the rail section R can be reduced. As a result, tilting of the lighting fixture 1 relative to the rail section R can be suppressed.

[0132] Next, the plug portion 100 of Embodiment 2 will be described in detail with reference to Figures 9, 10, and 14. Figure 14 shows the plug portion 100 in the first state.

[0133] The angle of the connecting portion 120 of the plug portion 100 in Embodiment 2 shown in Figure 14 is different from the angle of the connecting portion 120 of the plug portion 100 in Embodiment 1 shown in Figure 9. Specifically, the angle of the connecting portion 120 in Embodiment 2 is 90 degrees different from the angle of the connecting portion 120 in Embodiment 1. In other words, in Embodiment 2, when in the first state, the connecting portion 120 is aligned with the first direction PD1. Furthermore, when in the second state, the connecting portion 120 is aligned with the second direction PD2. Therefore, even if the mounting position of the plug portion 100 is changed to match 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 connecting portion 120. As a result, the degree of freedom when attaching the plug portion 100 to the lighting fixture 1 is improved.

[0134] For example, to change the angle of the connecting part 120, the connecting part 120 shown in Figure 10 is rotated by 90 degrees, and the locking projection 124 of the connecting part 120 is locked into the locking recess 137 of the switching part 130. Therefore, when the switching part 130 rotates in the first rotational direction RA, the connecting part 120 aligns with the second direction PD2. Also, when the switching part 130 rotates in the second rotational direction RB, the connecting part 120 aligns with the first direction PD1. As a result, even if the mounting position of the plug part 100 is changed, the lighting fixture 1 can be attached to the rail part R.

[0135] Furthermore, the angle of the conductive part 160 of the plug part 100 in Embodiment 2 shown in Figure 14 is different from the angle of the conductive part 160 of the plug part 100 in Embodiment 1 shown in Figure 9. Specifically, the angle of the conductive part 160 in Embodiment 2 is 90 degrees different from the angle of the conductive part 160 in Embodiment 1. In other words, in Embodiment 2, the conductive terminal 182 protrudes from the plug base part 140. Therefore, the position of the conductive part 160 relative to the plug base part 140 can be changed to match the position of the power supply unit 15. As a result, the degree of freedom in the placement of the power supply unit 15 is improved.

[0136] For example, to change the angle of the conductive part 160, the conductive part 160 shown in Figure 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 to match the direction in which the power supply unit 15 is arranged. As a result, it becomes easy to connect the power supply unit 15 and the conductive part 160 within the lighting fixture 1.

[0137] Furthermore, in this embodiment, when the lighting fixture 1 is attached to the rail section R, the switching section 130 is housed in the through section 203. In other words, when attaching multiple lighting fixtures 1 to the rail section R, the distance between each lighting fixture 1 can be reduced. This means that multiple lighting fixtures 1 can be attached to the rail section 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, the lighting fixture 1 of Embodiment 3 will be described with reference to Figures 15 to 25. The lighting fixture 1 of Embodiment 3 differs in shape from the lighting fixture 1 of Embodiment 1. Below, the differences between Embodiment 3 and Embodiment 1 will be described, and the explanation of parts that overlap with Embodiment 1 will be omitted.

[0139] The lighting fixture 1 according to Embodiment 3 will be described with reference to Figures 15 to 17. Figure 15 is a perspective view showing the lighting fixture 1 according to Embodiment 3 of the present invention. Figure 16 is an exploded perspective view of the lighting fixture 1 according to Embodiment 3. Figure 17 is a schematic diagram showing a cross-section of the lighting fixture 1 according to Embodiment 3. In the lighting fixture 1 according to Embodiment 3, the first unit U1 is housed inside the second unit U2 such that the lower surface 31 of the cover member 3 of the first unit U1 is exposed. In this embodiment, "exposing the lower surface 31" means that 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 outside the second unit U2. Therefore, the first unit U1 in this embodiment can be in one of the following states: the entire unit is housed inside the second unit U2, the lower surface 31 is located on the same plane as the lower surface of the second unit U2, or part or all of the first unit U1 protrudes from the second unit U2.

[0140] As shown in Figure 15, the lighting fixture 1 is attached to the rail section R. The lighting fixture 1 emits light. The lighting fixture 1 extends along the first direction PD1. The lighting fixture 1 comprises a first unit U1 and a second unit U2. In addition, the lighting fixture 1 of Embodiment 3 is connected to the rail section R by a plug section 100.

[0141] The first unit U1 emits light and functions as a light source unit. As shown in Figures 15 to 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 a mounting member 19.

[0142] The cover member 3 diffuses the light emitted from the light source unit 7. In the lighting fixture 1 of Embodiment 3, the first unit U1 is housed inside the second unit U2, so 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 the emission surface.

[0143] The light source unit 7 emits light. As shown in Figure 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 by a cover member 3. In other words, 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 that dissipates the heat generated when the light source 7 emits light. The light source 7 is attached to the base member 13. The cover member 3 is fixed to the base member 13.

[0145] As shown in Figures 16 and 17, the mounting member 19 attaches the first unit U1 to the first wall 201 of the housing 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 attached 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 positioned on the ends of the first direction PD1 of the first unit U1. Specifically, one of the pair of mounting members 19 is positioned at one end of the first direction PD1 of the first unit U1. The other of the pair of mounting members 19 is positioned at the other end of the first direction PD1 of the first unit U1.

[0146] As shown in Figures 16 and 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 the external power of an external power source. As shown in Figures 16 and 17, the power supply unit 15 is positioned between the plug units 100. Therefore, the plug units 100 and the power supply unit 15 can be positioned at different locations on the second main surface B2. In other words, the plug units 100 and the power supply unit 15 do not overlap in the third direction PD3. Therefore, the vertical thickness of the lighting fixture 1 does not increase due to overlapping of the plug units 100 and the power supply unit 15. As a result, when the lighting fixture 1 is attached to the rail unit R, it is possible to suppress the lighting fixture 1 from protruding excessively from the surface to which the rail unit R is attached.

[0147] Furthermore, the power supply unit 15 is positioned closer to one of the pair of mounting members 19. Therefore, the power supply unit 15 is not located in the central part of the first unit U1. Consequently, weight is not placed on the central part of the first unit U1. As a result, sagging of the central part of the first unit U1 towards the third direction PD3 is suppressed.

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

[0149] As shown in Figure 17, the housing section 21 of Embodiment 3 houses the first unit U1. The housing section 21 has a box shape with one side open. Specifically, the bottom of the housing section 21 is open. The housing section 21 has an opening that extends along the first direction PD1.

[0150] The housing section 21 of the second unit U2 further includes a first wall 201, a pair of second walls 202, and a pair of penetration sections 203.

[0151] The first wall 201 faces the rail section R. A pair of second walls 202 are positioned between a 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 walls 202A and 202B extend from the first wall 201 toward the third direction PD3. Specifically, the second walls 202A and 202B extend from the first wall 201 toward the lower surface 31 of the cover member 3 of the first unit U1.

[0152] Each of the pair of second closing members 23 closes a pair of open ends 24 in the longitudinal direction of the housing section 21. Each of the pair of second closing members 23 is fixed to a pair of ends in the longitudinal direction of the housing section 21.

[0153] As shown in Figure 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, passing through the inside and outside of the housing 21. A plug section 100 is positioned in each of the pair of through-holes 203. The pair of plug sections 100 attach the second unit U2, which houses the first unit U1, to the rail section R. One of the plug sections 100 supplies external power to the lighting fixture 1 by being connected to the rail section R.

[0154] Similar to Embodiment 1, the plug portion 100 includes 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 Figures 15 to 19. Figure 18 is an enlarged view of a part of the second unit U2 of the lighting fixture 1 of Embodiment 3. Figure 19 is a view of the second unit U2 shown in Figure 18 from the ceiling side.

[0156] As shown in Figures 18 and 19, the through-hole 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 the first direction PD1. The first through-hole 203A is adjacent to the second through-hole 203B in the second direction PD2.

[0158] As shown in Figures 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] As shown in Figures 18 and 19, the second through-hole 203B is located where the plug portion 100 and the first light-shielding portion 301 (described later) are located. 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] As shown in Figures 18 and 19, the third through-hole 203C is located where the first light-shielding portion 301, which will be described later, is located. The size of the third through-hole 203C corresponds to the size of the first light-shielding portion 301. The length of the first direction PD1 of the third through-hole 203C is length L4. The length L5 of the third direction PD3 of the third through-hole 203C is approximately the same as the length of the third direction PD3 of the plug base portion 140.

[0163] Therefore, the plug portion 100 can be positioned in the through portion 203 from the side of the third through hole 203C. Thus, it is possible to attach the plug portion 100 while the first unit U1 is housed in the housing portion 21. Furthermore, it is possible to remove the plug portion 100 from the housing portion 21 while the first unit U1 is housed in the housing portion 21. In other words, it is no longer necessary to separate the first unit U1 and the second unit U2 when attaching or removing the plug portion 100. Therefore, it is possible to easily attach the plug portion 100 to the through portion 203 of the housing portion 21. It is also possible to easily remove the plug portion 100 from the through portion 203 of the housing portion 21. As a result, the work efficiency of attaching and removing the plug portion 100 is improved.

[0164] Next, the second unit U2 will be described in more detail with reference to Figures 18 to 24. Figure 20 shows the XX-XX cross-section of the lighting fixture 1 shown in Figure 18.

[0165] As shown in Figure 20, the housing section 21 of the second unit U2 in Embodiment 3 has a first locking piece 221A and a second locking piece 221B inside.

[0166] The first locking piece 221A is positioned on the second wall 202A of the housing section 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 positioned on the second wall 202B of the housing 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 Figure 20, the second unit U2 of Embodiment 3 further includes a first light-shielding portion 301 and a second light-shielding portion 351.

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

[0170] Furthermore, the first light-shielding section 301 can prevent dust and other debris from the outside of the lighting fixture 1 from entering the inside of the lighting fixture 1 through the penetration section 203.

[0171] The first light-shielding portion 301 is formed of a rigid material. The rigid material is, for example, made of synthetic resin or metal. The synthetic resin is, for example, ABS resin. By forming the first light-shielding portion 301 of a rigid material, it becomes easier to assemble the first light-shielding portion 301 to the second unit U2 compared to using a flexible material.

[0172] Furthermore, the plug base portion 140 of the plug portion 100 restricts light leakage from the first through-hole 203A. The plug portion 100 is formed of a light-shielding material. Therefore, it is possible to restrict light leakage from the first through-hole 203A, the second through-hole 203B, and the third through-hole 203C. As a result, the deterioration of aesthetics caused by the visibility of the through-hole 203 due to light leakage from the through-hole 203 can be suppressed.

[0173] For example, if light leaks from each of the through-holes of multiple lighting fixtures, the light leaking from each through-hole of multiple lighting fixtures will be more noticeable than the light in a single line, causing discomfort to the user. This may also reduce the aesthetic appeal of the lighting fixtures. On the other hand, in this embodiment, the first light-shielding part 301 and the plug part 100 can restrict the leakage of light from the first through-hole 203A, the second through-hole 203B, and the third through-hole 203C. In other words, light is emitted only from the bottom surface 31 of the lighting fixture 1, and light does not leak from the through-hole 203, thus suppressing the discomfort caused to the user. Therefore, when multiple lighting fixtures 1 are mounted side by side on a single rail part R, light is emitted from the bottom surface 31 of each of the multiple lighting fixtures 1. As a result, it becomes possible to emit light in a single line, improving the aesthetic appeal of the lighting fixtures 1.

[0174] The second light-shielding portion 351 restricts light from leaking out of the housing portion 21 from the penetration portion 203. Specifically, the second light-shielding portion 351 restricts light emitted from the side of the cover member 3 from being reflected inside the housing portion 21 and directed toward the penetration portion 203. Therefore, the amount of light directed toward the penetration portion 203 can be reduced. As a result, leakage of light to the outside of the penetration portion 203 can be further suppressed.

[0175] The second light-shielding portion 351 is formed of a rigid material. The rigid material is, for example, made of synthetic resin or metal. The synthetic resin is, for example, ABS resin. By forming the second light-shielding portion 351 of a rigid material, it becomes easier to assemble the second light-shielding portion 351 to the second unit U2 compared to using a flexible material.

[0176] Next, the first light-shielding portion 301 and the second light-shielding portion 351 will be described in more detail with reference to Figures 18 to 24. Figure 21 is a diagram showing the plug portion 100, the first light-shielding portion 301, and the second light-shielding portion 351 of Embodiment 3. Figure 22 is an exploded perspective view showing the plug portion 100, the first light-shielding portion 301, and the second light-shielding portion 351 of Embodiment 3. Figure 23(a) is a diagram showing an enlarged view of the first light-shielding portion 301. Figure 23(b) is a diagram showing an enlarged view of the second light-shielding portion 351. Figure 24 is a diagram showing the XXIV-XXIV cross-section of the lighting fixture 1 shown in Figure 19.

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

[0178] As shown in Figures 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 section 301. The first opening 310 is located on the side of the second wall 202A. The first opening 310 is larger than the second opening 320. In the first light-shielding section 301, the openings increase in size from the second opening 320 toward the first opening 310. The first opening 310 and the second opening 320 are openings for the user to access the lever portion 132 of the plug portion 100.

[0179] As shown in Figure 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 come into contact. Therefore, light leakage from between the plug base portion 140 and the first light-shielding portion 301 can be suppressed.

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

[0181] Furthermore, as shown in Figure 20, the second surface 301B of the first light-shielding portion 301 is in contact with the second light-shielding portion 351. Therefore, it is possible to suppress light leakage from between the first light-shielding portion 301 and the second light-shielding portion 351.

[0182] Furthermore, as shown in Figure 20, the first light-shielding portion 301 has a restricting portion 302, a contact portion 303, and a groove portion 304.

[0183] The contact portion 303 contacts the plug base portion 140. By the contact portion 303 and the plug base portion 140, light leakage from between the contact portion 303 and the plug base portion 140 can be suppressed. The contact portion 303 is positioned 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 positioned on the first surface 301A of the first light-shielding portion 301. The restricting portion 302 protrudes beyond the contact portion 303. Therefore, when the plug base portion 140 of the plug portion 100 contacts the contact 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] Furthermore, the regulating portion 302 has an inclined surface. The inclined surface is inclined in the 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 openings increase from the second opening 320 toward the first opening 310. Therefore, access to the lever portion 132 of the plug portion 100 is made easier. As a result, operation of the lever portion 132 of the plug portion 100 is made easier.

[0186] As shown in Figure 20, the lever portion 132 of the plug portion 100 in Embodiment 3 is located closer to the second wall 202B than to the second wall 202A. For example, if the regulating portion does not have an inclined surface, a finger may touch the wall between the second opening and the first opening, making it difficult to operate the lever portion. In other words, the action of placing a finger on the lever portion and raising it is hindered by the wall between the second opening and the first opening. On the other hand, since the regulating portion 302 of Embodiment 3 has an inclined surface, the obstruction of the action of raising the lever portion 132 by the wall between the second opening and the first opening can be reduced. As a result, the operation of the lever portion 132 of the plug portion 100 becomes easier.

[0187] The groove 304 is located on the second surface 301B. It is a hole that extends from the second surface 301B toward the first surface 301A. The first support piece 374A, the second support piece 374B, and the third support piece 374C of the second light-shielding portion 351, which will be described later, are inserted into the groove 304.

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

[0189] As shown in Figure 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 Figures 22 and 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 comes into contact with the contact 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 more than the contact portion 303A.

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

[0192] The contact portion 303A contacts the plug base portion 140. By the contact between the contact portion 303A and the plug base portion 140, light leakage from between the contact portion 303A and the plug base portion 140 can be suppressed.

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

[0194] As shown in Figures 21 to 23, the second light-shielding portion 332 is erected from the first light-shielding portion 331 and faces the third light-shielding portion 333. The second light-shielding portion 332 extends in a direction along 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 contacts the contact 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 contact portion 303B in the direction from the second light-shielding portion 332 toward the third light-shielding portion 333.

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

[0197] The contact portion 303B contacts the plug base portion 140. By the contact between the contact portion 303B and the plug base portion 140, light leakage from between the contact portion 303B and the plug base portion 140 can be suppressed.

[0198] The groove 304B is a hole extending from the second surface 301B toward the first surface 301A. The groove 304B extends along the third direction PD3. The end of the groove 304B on the side of the third direction PD3 is open. The end of the groove 304B on the opposite side of the third direction PD3 is closed. The width of the groove 304B increases as it approaches the first light-shielding portion 331. In other words, the width of the groove at the end of the groove 304B on the side of the third direction PD3 is larger. Therefore, the second support piece 374B of the second light-shielding portion 351, which will be described later, can be guided into 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] As shown in Figures 21 to 23, the third light-shielding portion 333 is erected from the first light-shielding portion 331 and faces the second light-shielding portion 332. The third light-shielding portion 333 extends in a direction along 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 contacts the contact 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 contact portion 303C in the direction from the third light-shielding portion 333 toward the second light-shielding portion 332.

[0201] Furthermore, the regulating portion 302C has an inclined surface. The inclined surface is inclined in a direction from the first regulating 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. This contact between the contact portion 303C and the plug base portion 140 prevents light leakage from between the contact portion 303C and the plug base portion 140.

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

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

[0205] As shown in Figure 20, the first light-shielding plate 360 ​​is located between the light source unit 7 and the plug unit 100. As shown in Figure 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 restricts the light reflected inside the housing unit 21 from going towards the penetration unit 203. The first light-shielding plate 360 ​​extends along the first direction PD1.

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

[0207] As shown in Figure 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 21. Specifically, the first locking piece 361 faces the side of the first locking piece 221A that faces the light source unit 7. The first locking piece 221A extends along the first direction PD1.

[0208] As shown in Figure 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 21. Specifically, the second locking piece 362 faces the side of the second locking piece 221B that faces the light source unit 7. 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 and the first locking piece 361 of the second wall 202A come into contact. Furthermore, when the first light-shielding plate 360 ​​moves toward the plug portion 100, the second locking piece 221B and the second locking piece 362 of the second wall 202B come into contact. 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 two ends of the first light-shielding plate 360 ​​in the first direction PD1 is fitted with one of the pair of third light-shielding plates 380. The other of the two ends of the first light-shielding plate 360 ​​in the first direction PD1 is fitted with the other of the pair of third light-shielding plates 380. One of the two ends of the first light-shielding plate 360 ​​in the second direction PD2 is fitted with a first locking piece 361. The other end of the first light-shielding plate 360 ​​in the second direction PD2 is fitted with a second locking piece 362. A second light-shielding plate 370 is fitted between the first locking piece 361 and the second locking piece 362.

[0211] Furthermore, 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 housed in the housing 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 housed in the housing portion 21 of the second unit U2. It is also possible to prevent the cover member 3 of the first unit U1 from protruding excessively from the housing portion 21 of the second unit U2. As a result, the first unit U1 can be positioned in the correct location inside the housing portion 21 of the second unit U2.

[0212] Therefore, the opening of the housing section 21 of the second unit U2 and the lower surface 31 of the cover member 3 of the first unit U1 are flush. Thus, the aesthetic appearance when the first unit U1 is housed in the housing section 21 of the second unit U2 can be improved. In addition, since the positioning section 363 determines the position of the first unit U1, the work efficiency when attaching the first unit U1 to the second unit U2 is improved.

[0213] As shown in Figure 24, the second light-shielding plate 370 is located between the plug portion 100 and the second wall 202A. Specifically, the second light-shielding plate 370 is located between the plug portion 100 and the second wall 202A and restricts the light reflected inside the housing portion 21 from going toward the penetration portion 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. Also, the second light-shielding plate 370 extends along the third direction PD3.

[0214] The second light-shielding 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 positioned at one end of the second light-shielding plate 370 in the first direction PD1. 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. In other words, one end of the second light-shielding plate 370 and one end of the first light-shielding plate 360 ​​are separated. Therefore, one end of the second light-shielding plate 370 swings in the direction toward the first light-shielding plate 360 ​​or toward the second wall 202A.

[0216] At the other end of the second light-shielding plate 370 in the first direction PD1, the other third locking piece 371 of the pair is positioned. 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. In other words, the other end of the second light-shielding plate 370 and the other end of the first light-shielding plate 360 ​​are separated. Therefore, the other end of the second light-shielding plate 370 swings in the direction toward the first light-shielding plate 360 ​​or toward the second wall 202A.

[0217] As shown in Figure 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 Figure 24, each of the pair of third locking pieces 371 protrudes from the second light-shielding plate 370 toward the second wall 202B. Thus, the strength of each of the pair of third locking pieces 371 is improved. Furthermore, the pair of third locking pieces 371 extend along the second direction PD2. Thus, the worker can remove the second light-shielding section 351 from the housing section 21 by using the portion of the pair of third locking pieces 371 that extends along the second direction PD2. For example, the worker can grasp the portion of the pair of third locking pieces 371 that extends along the second direction PD2 with their fingers and move the pair of third locking pieces 371 toward the first light-shielding plate 360. The second light-shielding section 351 can be removed from the housing section 21 by moving the pair of third locking pieces 371 toward the first light-shielding plate 360. Furthermore, since the portion of the pair of third locking pieces 371 extending along the second direction PD2 can be grasped by the worker with their fingers, the efficiency of the installation and removal of the second light-shielding section 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 side of the first wall 201. 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 and the first locking piece 221A come into contact. 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 attaching the second light-shielding portion 351 to the housing portion 21, the second light-shielding portion 351 is inserted into the housing portion 21 from the third direction PD3 side. At this time, the inclined surface 376 comes into contact with the first locking piece 221A. When the inclined surface 376 comes into contact with the first locking piece 221A, the inclined surface 376 is pushed by the first locking piece 221A. As a result, both ends of the second light-shielding plate 370 are moved toward the first light-shielding plate 360.

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

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

[0222] The opening 370H is located between a pair of third locking pieces 371. As shown in Figure 21, the first light-shielding 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 portion 301. Specifically, as shown in Figure 20, the first support piece 374A supports the first light-shielding portion 331 by being inserted into the groove 304A of the first light-shielding portion 331. Furthermore, by inserting the first support piece 374A into the groove 304A of the first light-shielding portion 331, 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 portion 301. Specifically, the second support piece 374B supports the second light-shielding portion 332 by being inserted into the groove 304B of the second light-shielding portion 332. Furthermore, by inserting the second support piece 374B into the groove 304B of the second light-shielding portion 332, 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 supports the third light-shielding portion 333 by being inserted into the groove 304C of the third light-shielding portion 333. Furthermore, by inserting the third support piece 374C into the groove 304C of the third light-shielding portion 333, leakage of light from between the third light-shielding portion 333 and the third support piece 374C can be suppressed.

[0226] The pair of third light-shielding plates 380 restrict the light reflected inside the housing 21 from moving from the first direction PD1 towards the penetration 203. The third light-shielding plates 380 are erected in the opposite direction from the first light-shielding plates 360 to the third direction PD3. The third light-shielding plates 380 extend along the third direction PD3.

[0227] As shown in Figure 24, the shape of the lighting fixture 1 in Embodiment 3 and the shape of the rail section R are approximately the same. For example, the cross-sectional shape of the second unit U2 housing the first unit U1 is rectangular. Specifically, the shape of the second unit U2 housing the first unit U1 is a rectangular parallelepiped. The cross-sectional shape of the rail section R is also rectangular. Specifically, the shape of the rail section R is a rectangular parallelepiped. The first unit U1 is housed in the second unit U2. The lighting fixture 1 with the second unit U2 housed in the first unit U1 extends along the first direction PD1, and the rail section 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 section R in the second direction PD2 are approximately the same. Therefore, when the lighting fixture 1 is connected to the rail section R, almost the entire connecting portion 120 of the plug portion 100 is housed inside the rail section R, and the lighting fixture 1 can be positioned close to the rail section R. Therefore, the gap between the lighting fixture 1 and the rail section R when the lighting fixture 1 is attached to the rail section R can be reduced. As a result, the gap between the lighting fixture 1 and the rail section R becomes smaller, and the reduction in aesthetic appeal caused by the gap can be suppressed. In addition, because the gap between the lighting fixture 1 and the rail section R becomes smaller, the second wall 202 and the side surface R4 of the rail section R appear to be composed of a continuous surface, thereby enhancing the sense of unity in appearance between the lighting fixture 1 and the rail section R.

[0228] Furthermore, since the lighting fixture 1 and the rail section R are rectangular prisms, their shapes are unified. Moreover, the direction in which the lighting fixture 1 extends and the direction in which the rail section R extends are unified. Furthermore, the length of the lighting fixture 1 and the length of the rail section R in the second direction PD2 are unified. In other words, when the lighting fixture 1 is attached to the rail section R, the sense of unity between the lighting fixture 1 and the rail section R is improved. As a result, the user's sense of incongruity when attaching the lighting fixture 1 to the rail section R can be reduced.

[0229] Next, the lighting fixture 1 of Embodiment 3 will be described in more detail with reference to Figure 25. Figure 25 is a diagram showing a rail section R having a finisher RF. As shown in Figure 25, the rail section R may be equipped with a finisher RF. The finisher RF closes the end of the rail section R in the first direction PD1.

[0230] In Embodiment 3, the plug portion 100 of the lighting fixture 1 is positioned a predetermined distance away from the second blocking member 23 in the first direction PD1. This 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 portion of the rail portion R in the first direction PD1. In other words, as shown in Figure 25, the lighting fixture 1 can be attached to the rail portion R such that the end of the lighting fixture 1 and the end of the finisher RF are flush. 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. Thus, any discomfort felt by the user can be reduced.

[0231] 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 forms without departing from its essence. Furthermore, various inventions can be formed by appropriately combining the multiple components disclosed in each of the above embodiments. For example, some components may be deleted from all the components shown in the embodiments. Furthermore, components from different embodiments may be appropriately combined. The drawings schematically show each component for ease of understanding, and the thickness, length, number, spacing, etc. of each component shown may differ from the actual dimensions due to the convenience of drawing creation. Also, the speed, material, shape, dimensions, etc. of each component shown in the above embodiments are examples and are not particularly limited, and various modifications are possible without substantially departing from the configuration of the present invention.

[0232] (1) In Embodiment 1, one of the pair of plug sections 100 had a relay terminal section 181, but is not limited to this. The relay terminal section 181 may be provided by each of the pair of plug sections 100. When each of the pair of plug sections 100 has a relay terminal section 181, the lighting fixture 1 comprises a pair of plug sections 100, a plurality of power supply units 15 corresponding to each of the pair of plug sections 100, and a plurality of light source units 7 corresponding to each of the plurality of power supply units 15.

[0233] For example, in the case of a lighting fixture 1 capable of color temperature 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 color. The other plug unit 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 color different from the first color.

[0234] Furthermore, for example, in the case of a lighting fixture 1 in which the control content performed on each of the multiple power supply units 15 is different, one of the pair of plug units 100 supplies power to the first power supply unit. The first power supply unit supports, for example, PWM (Pulse Width Modulation) control. The other plug unit 100 of the pair of plug units 100 supplies power to the second power supply unit. The second power supply unit supports, for example, DALI (Digital Addressable Lighting Interface) control. DALI® control is a control standard for lighting fixtures.

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

[0236] The lighting fixture 1 described in Embodiments 1 to 3 may have a pattern similar to that of the rail section R. Furthermore, the lighting fixture 1 and the rail section R may have the same color. By making the patterns and colors of the lighting fixture 1 and the rail section R the same, the sense of unity between the lighting fixture 1 and the rail section R is further enhanced.

[0237] In the lighting fixture 1 described in Embodiments 1 to 3, the first unit U1 was attached to the second unit U2 by a mounting member 19 with screws, but the invention is not limited to this. For example, the mounting member 19 may have an elastic part such as a leaf spring. The elastic part has a pair of mounting parts. The pair of mounting parts face each other. One of the pair of mounting parts is biased toward the second wall 202A, for example. The other of the pair of mounting parts is biased toward the second wall 202B, for example. Therefore, when the first unit U1 is housed in the housing part 21 of the second unit U2, the mounting member 19 comes into contact with the second wall 202A and the second wall 202B. In this way, the first unit U1 is attached to the second unit U2.

[0238] [Note 1] The lighting fixture according to the present invention comprises a base member, a light source unit, a power supply unit, a plug unit, and a housing unit. Preferably, the base member has a first main surface and a second main surface that face each other. Preferably, the light source unit is arranged on the first main surface and emits light. Preferably, the power supply unit supplies power to the light source unit based on external power from an external power source. Preferably, the plug unit supplies the external power to the power supply unit by being connected to a rail unit. Preferably, the housing unit houses the base member, the power supply unit, and a specific part of the plug unit. Preferably, the power supply unit faces the second main surface. Preferably, the specific part faces the second main surface at a position different from the position on the second main surface where the power supply unit faces, and overlaps with the first main surface in a direction intersecting the base member at the position on the first main surface where the light source unit is arranged.

[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 is preferably used to switch the connection state of the connecting portion to the rail portion. The housing portion is preferably further having a first wall, a second wall, and a through portion. The first wall is preferably facing the rail portion. The second wall is preferably extended in a direction toward the base member from the first wall. The through portion is preferably used to penetrate the inside of the housing portion and the outside of the housing portion from a part of the first wall to a part of the second wall.

[0240] The switching unit 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 unit protrudes from the through portion. When switching to the second state, it is preferable that the switching unit is housed in the through portion.

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

[0242] The plug portion according to the present invention further comprises a first restricting portion. Preferably, the first restricting portion restricts the rotation of the switching portion which rotates in a first rotation direction. Preferably, the first rotation direction indicates the direction in which the switching portion rotates around its rotation axis and the connecting portion moves from the second state to the first state.

[0243] The plug portion according to the present invention further comprises a second restricting portion. Preferably, the second restricting portion restricts the rotation of the switching portion which rotates in a second rotation direction. Preferably, the second rotation direction indicates the direction in which the switching portion rotates around the rotation axis and the connecting portion moves from the first state to the second state.

[0244] The plug portion according to the present invention further comprises a first engaging portion. The switching portion preferably comprises a second engaging portion that engages with the first engaging portion. The first engaging portion is preferably positioned at a location where the rail portion and the connecting portion are in the first state, or at a location 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 projection. The second engaging portion is preferably an engaging recess. The size of the engaging recess is preferably larger than the size of the engaging projection.

[0246] The first engaging portion according to the present invention includes a first engaging projection and a second engaging projection. The second engaging projection is preferably positioned differently from the first engaging projection. The first engaging projection is preferably engaged with the engaging recess when the rotation of the switching portion is restricted by the first restricting portion. The second engaging projection is preferably engaged with the engaging recess when the rotation of the switching portion is restricted by the second restricting portion.

[0247] The plug portion according to the present invention further comprises a conductive portion. The conductive portion receives the external power from the relay terminal portion and transmits the external power to the power supply portion. The housing portion extends along the direction in which the base member extends. Preferably, the conductive portion is arranged in the same direction as the housing portion extends.

[0248] [Note 2] Aspect 1 of the present disclosure comprises a long 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 that supplies power to the light source unit based on external power from an external power source; a plug unit connected to a rail unit to supply the external power to the power supply unit; and a housing unit extending in the first direction and housing the base member, the power supply unit and a specific part of the plug unit, wherein the power supply unit faces the second main surface, and the specific part is located at a position on the second main surface different from the position on which the power supply unit faces. The accommodating portion has a first wall facing the rail portion, a second wall extending from the first wall toward the base member, and a through portion extending from a part of the first wall toward a part of the second wall through which a through hole is provided that penetrates the inside of the accommodating portion and the outside of the accommodating portion, and the plug portion is positioned in the through portion at a position spaced apart from the end of the accommodating portion in the first direction.

[0249] Aspect 2 of the present disclosure is a lighting fixture in Aspect 1, 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 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 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, and when switching to the first state, the switching unit protrudes from the through portion, and when switching to the second state, the switching unit is housed in the through portion.

[0251] Aspect 4 of the present disclosure is a lighting fixture in aspect 3, wherein the plug portion further comprises a first restricting portion that restricts the rotation of the switching portion which rotates in a first rotation direction, and the first rotation direction indicates the direction in which the switching portion rotates around a rotation axis and moves from the second state to the first state.

[0252] Aspect 5 of the present disclosure is a lighting fixture in Aspect 4, wherein the plug portion further comprises a second restricting portion that restricts the rotation of the switching portion which rotates in a second rotational direction, and the second rotational direction indicates the direction in which the switching portion rotates around its rotational axis and moves from the first state to the second state.

[0253] Aspect 6 of the present disclosure comprises 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 that supplies power to the light source unit based on external power from an external power source, a plug unit connected to a rail unit to supply the external power to the power supply unit, and a housing unit that houses the base member, the power supply unit and a specific part of the plug unit, wherein the power supply unit faces the second main surface, and the specific part faces the second main surface at a position on the second main surface different from the position on which the power supply unit faces, and The plug portion overlaps the first main surface in a direction intersecting the base member at the position where the light source portion is arranged on the first main surface, and further includes a connecting portion connected to the rail portion and a switching portion for switching the connection state of the connecting portion to the rail portion, and the housing portion further has a first wall facing the rail portion, a second wall extending from the first wall toward the base member, and a through portion that penetrates the inside of the housing portion and the outside of the housing portion from a part of the first wall toward a part of the second wall, and the connecting portion is connected to the through portion The switching section is positioned on the side of the first wall and located in the through section and on the side of the second wall, and switches between a first state in which the rail section and the connecting section are not connected and a second state in which the rail section and the connecting section are connected. When switching to the first state, the switching section protrudes from the through section, and when switching to the second state, the switching section is housed in the through section. The plug section has a first restricting section that restricts the rotation of the switching section that rotates in the first rotation direction and a second restricting section that restricts the rotation of the switching section that rotates in the second rotation direction. The lighting fixture further comprises a section and a first engaging section, wherein the first rotation direction indicates the direction in which the switching section rotates around a rotation axis to go from the second state to the first state, and the second rotation direction indicates the direction in which the switching section rotates around a rotation axis to go from the first state to the second state, and further, the switching section has a second engaging section that engages with the first engaging section, and the first engaging section is positioned in a position where the rail section and the connecting section are in the first state, or in a position where the rail section and the connecting section are in the second state.

[0254] Aspect 7 of the present disclosure is a lighting fixture according to aspect 6, wherein the first engaging portion is an engaging projection, the second engaging portion is an engaging recess, and the size of the engaging recess is larger than the size of the engaging projection.

[0255] Aspect 8 of the present disclosure is a lighting fixture according to aspect 7, wherein the first engaging portion includes a first engaging projection and a second engaging projection positioned differently from the first engaging projection, the first engaging projection engages with the engaging recess when the rotation of the switching portion is restricted by the first restricting portion, and the second engaging projection engages with the engaging recess when the rotation of the switching portion is restricted by the second restricting portion.

[0256] Aspect 9 of the present disclosure is a lighting fixture according to any of aspects 3 to 8, wherein the plug portion further comprises a relay terminal portion for relaying the external power to the power supply unit, the relay terminal portion not relaying the external power to the power supply unit in the first state, and relaying the external power to the power supply unit in the second state.

[0257] Aspect 10 of the present disclosure is a lighting fixture according to aspect 9, 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 housing portion extends along the direction in which the base member extends, and the conductive portion is arranged in the same direction as the direction in which the housing portion extends.

[0258] [Note 3] A third aspect of the present disclosure, aspect 1, comprises a long base member having a first main surface and a second main surface opposite to the first main surface, 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 source; a plug unit connected to a rail unit to supply the external power to the power supply unit; and a housing unit extending in the first direction and housing the power supply unit and a specific part of the plug unit, wherein the power supply unit faces the second main surface, and the specific part is at a position on the second main surface different from the position on which the power supply unit faces. The lighting fixture is configured such that the housing portion faces the second main surface and overlaps with the first main surface in a direction intersecting the base member at the position where the light source portion of the first main surface is arranged, and the housing portion has a first wall facing the rail portion, a second wall extending from the first wall toward the base member, and a through portion having a through hole that penetrates the inside of the housing portion and the outside of the housing portion from a part of the first wall to a part of the second wall, the through portion is provided at a position spaced apart from the end of the housing portion in the first direction, and the plug portion is arranged in the through portion.

[0259] A third aspect of the present disclosure, aspect 2, is a lighting fixture of aspect 1, 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 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.

[0260] A third aspect of the present disclosure, aspect 3, comprises a long base member having a first main surface and a second main surface opposite to the first main surface, 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 source, a plug unit connected to a rail unit to supply the external power to the power supply unit, and a housing unit extending in the first direction and housing the power supply unit and a specific part of the plug unit, wherein the power supply unit faces the second main surface, the specific part faces the second main surface at a position different from the position on the second main surface where the power supply unit faces, and overlaps with the first main surface in a direction intersecting the base member at the position on the first main surface where the light source unit is disposed, and the housing unit has a first wall facing the rail unit, a second wall extending from the first wall toward the base member, and the inside of the housing unit and the outside of the housing unit from a part of the first wall toward a part of the second wall The lighting fixture has a through portion having a through hole through which it passes through, the through portion being located spaced apart from the first end of the housing portion, the plug portion including a connecting portion positioned in the through portion and connected to the rail portion, and a switching portion for switching the connection state of the connecting portion to the rail portion, the connecting portion being located on the side of the first wall, the switching portion being located on the side of the second wall, and switching 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, the switching portion protruding from the through portion when switching to the first state, and the switching portion being housed in the through portion.

[0261] A third aspect of the present disclosure, aspect 4, is a lighting fixture of aspect 3, wherein the plug portion further comprises a first restricting portion that restricts the rotation of the switching portion which rotates in a first rotation direction, and the first rotation direction indicates the direction in which the switching portion rotates about a rotation axis and moves from the second state to the first state.

[0262] A third aspect of the present disclosure, aspect 5, is a lighting fixture of aspect 4, wherein the plug portion further comprises a second restricting portion that restricts the rotation of the switching portion which rotates in a second rotation direction, the second rotation direction being the direction in which the switching portion rotates about a rotation axis and moves from the first state to the second state. [Industrial applicability]

[0263] This invention provides a lighting fixture and has industrial applicability. [Explanation of Symbols]

[0264] 1: Lighting fixtures 7:Light source section 13: Base component 15: Power supply section 21: Containment Unit 100: Plug part 120:Connection part 130: Switching section 138F: Second engaging portion (engaging 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 section 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. A long base member having a first main surface and a second main surface opposite to the first main surface, extending in a first direction, A light source unit is arranged on the first main surface and emits light, A power supply unit that supplies power to the light source unit based on the external power of an external power source, A plug section which is connected to the rail section to supply the external power to the power supply section, A housing portion extending in the first direction and housing the power supply unit and the specific part of the plug unit Equipped with, The power supply unit faces the second main surface, The specified portion faces the second main surface at a position different from the position on the second main surface where the power supply unit faces, and overlaps with the first main surface in a direction that intersects with the base member at the position on the first main surface where the light source unit is arranged. The aforementioned housing section is A first wall facing the rail portion, A second wall extending in the direction toward the base member from the first wall, It has a through portion provided with a through hole that penetrates from a part of the first wall to a part of the second wall, passing through the inside of the housing and the outside of the housing, A lighting fixture in which the plug portion is positioned in the through-hole, and a first light-shielding portion that restricts the leakage of light from the through-hole to the outside of the housing portion is further positioned in the through-hole.

2. The first light-shielding portion is, The lighting fixture according to claim 1, which is arranged from the portion of the through-hole that penetrates the first wall to the portion that penetrates the second wall.

3. The lighting fixture according to claim 1, wherein the pivot axis of the plug portion is located at the center in the width direction of the housing portion.

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