Connecting parts

Abstract

To provide a connecting member capable of restraining leakage of light from between connected luminaires.SOLUTION: A connecting member 10 connects a first casing 110 included in a first luminaire 100 and having a first casing base 111 and a first casing wall 112, and a second casing body 210 included in a second luminaire 200 and having a second casing base 211 and a second casing wall 212. The connecting member 10 includes a base 20, and at least one wall 30. The base 20 faces the first casing base 111 and the second casing base 211 in a connecting state in which the connecting member 10 connects the first casing 110 and the second casing 210. The at least one wall 30 extends from the base 20 to a second direction D2 crossing a first direction D1 to which the base 20 extends, and faces the first casing wall 112 and the second casing wall 212 in the connecting state. Each of the base 20 and the wall 30 extends over the first casing 110 and the second casing 210.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a connecting member and a lighting system.

Background Art

[0002] The lighting device (lighting fixture) described in Patent Document 1 includes a pair of socket parts, a base part, and a lighting lamp. The pair of socket parts attach the lighting lamp to the lighting device and hold the lighting lamp. The pair of socket parts are provided at both ends in the longitudinal direction of the base part, respectively.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the socket part described in Patent Document 1 is rotatable. That is, when a plurality of lighting devices are arranged (connected) in series, it is necessary to provide a space for rotating the socket part between adjacent lighting devices. Therefore, there is a high possibility that light leaks from between adjacent lighting fixtures.

[0005] The present invention has been made in view of the above problems, and an object thereof is to provide a connecting member and a lighting system capable of suppressing light leakage from between connected lighting fixtures.

Means for Solving the Problems

[0006] The connecting member disclosed in the present application connects a first housing having a first housing base portion and a first housing wall portion included in a first lighting fixture and a second housing having a second housing base portion and a second housing wall portion included in a second lighting fixture. The connecting member includes a base portion and at least one wall portion. The base portion faces the first housing base portion and the second housing base portion in a connected state where the connecting member connects the first housing and the second housing. The at least one wall portion extends from the base portion in a second direction intersecting a first direction in which the base portion extends, and faces the first housing wall portion and the second housing wall portion in the connected state. Each of the base portion and the wall portion straddles the first housing and the second housing.

[0007] The connecting member disclosed in the present application preferably includes two of the wall portions. The two wall portions preferably face each other in a third direction intersecting the first direction and the second direction. In a non-connected state where the connecting member does not connect the first housing and the second housing, it is preferable that the distance between the proximal ends of the two wall portions is shorter than the distance between the distal ends of the two wall portions.

[0008] In the connecting member disclosed in the present application, the wall portion preferably has an engaging portion extending along the first direction. The engaging portion preferably engages with a first engaging portion provided on the inner surface of the first housing wall portion and extending along the first direction and a second engaging portion provided on the inner surface of the second housing wall portion and extending along the first direction.

[0009] The connecting member disclosed in the present application preferably further includes a protruding portion protruding in the first direction from an end portion of the base portion in the first direction. In the connected state, the tip of the protruding portion is preferably inclined with respect to the first direction.

[0010] In the connecting member disclosed in the present application, the protruding portion preferably includes a fitting portion protruding in a direction opposite to the second direction. The fitting portion preferably fits into a first housing fitting portion formed in the first housing base portion in the connected state.

[0011] In the connecting member disclosed in the present application, each of the base portion and the wall portion preferably has light-shielding properties.

[0012] The lighting system disclosed in the present application includes the connecting member described above, the first lighting fixture, and the second lighting fixture.

Effects of the Invention

[0013] According to the present invention, it is possible to suppress light from being emitted between the connected lighting fixtures.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Modes for Carrying Out the Invention

[0015] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and the description will not be repeated.

[0016] First, referring to FIG. 1, the lighting system 1 of the present embodiment will be described. FIG. 1 is a perspective view showing the lighting system 1 according to the present embodiment. The lighting system 1 of the present embodiment is used, for example, as a base light or indirect lighting. Also, in the present embodiment, the lighting system 1 is used by being suspended from the ceiling surface. Alternatively, the lighting system 1 of the present embodiment is installed, for example, on the ceiling surface, wall surface, or floor surface. The ceiling surface may be an inclined ceiling surface.

[0017] As shown in FIG. 1, the lighting system 1 includes a connecting member 10, a first lighting fixture 100, and a second lighting fixture 200. The connecting member 10 connects the first housing 110 included in the first lighting fixture 100 and the second housing 210 included in the second lighting fixture 200. The lighting system 1 shown in FIG. 1 is in a connected state where the connecting member 10 connects the first housing 110 and the second housing 210. In the present embodiment, in the connected state, the first housing 110 and the second housing 210 are connected so as to be in contact with each other, for example. That is, in the present embodiment, the first lighting fixture 100 and the second lighting fixture 200 are in contact with each other, for example, in the connected state. Note that the first housing 110 and the second housing 210 may not be in contact with each other in the connected state. That is, the first lighting fixture 100 and the second lighting fixture 200 may not be in contact with each other in the connected state.

[0018] In the present embodiment, the first lighting fixture 100 has, for example, a substantially rectangular parallelepiped shape. The first lighting fixture 100 includes a first housing 110, a first light source unit 120, and a first housing closing portion 130.

[0019] The first light source unit 120 emits light. The first light source unit 120 includes a first light source cover 121.

[0020] The first housing 110 has a first housing base portion 111 and a first housing wall portion 112. Specifically, the first housing 110 has a first housing base portion 111 and two first housing wall portions 112. The first housing 110 houses the first light source unit 120. In the present embodiment, when the first housing 110 houses the first light source unit 120, the side surface of the first light source unit 120 faces the inner surface of the first housing wall portion 112.

[0021] The surface of the first housing 110 facing the first housing base portion 111 is open. That is, the first housing 110 is open in the second direction D2 in the connected state. The second direction D2 will be described later. That is, the first housing 110 has an opening 110c facing the first housing base portion 111. The light emitted from the first light source unit 120 is emitted from the opening 110c of the first housing 110.

[0022] Of the longitudinal ends of the first housing 110, the first end 110a is adjacent to the second lighting fixture 200 in the connected state. On the other hand, of the longitudinal ends of the first housing 110, the second end 110b is an end on the side farther from the second lighting fixture 200 than the first end 110a in the connected state. The first end 210a and the second end 210b are open (see FIG. 2).

[0023] The first housing closing portion 130 is, for example, an end cap. The first housing closing portion 130 is attached to the second end 110b and closes the open second end 110b (see FIG. 2). The first housing closing portion 130 preferably has light-shielding properties.

[0024] In the present embodiment, the second housing 210 has, for example, a substantially rectangular parallelepiped shape. The second lighting fixture 200 includes a second housing 210, a second light source unit 220, and a second housing closing portion 230.

[0025] The second light source unit 220 emits light. The second light source unit 220 includes a second light source cover 221. In the present embodiment, a gap is formed between the second light source cover 221 and the first light source cover 121.

[0026] The second housing 210 has a second housing base portion 211 and a second housing wall portion 212. Specifically, the second housing 210 has a second housing base portion 211 and two second housing wall portions 212. The second housing 210 houses the second light source unit 220. In the present embodiment, when the second housing 210 houses the second light source unit 220, the side surface of the second light source unit 220 faces the inner surface of the second housing wall portion 212.

[0027] The surface of the second housing 210 facing the second housing base portion 211 is open. That is, the second housing 210 is open in the second direction D2 in the connected state. The second direction D2 will be described later. That is, the second housing 210 has an opening portion 210c facing the second housing base portion 211. The light emitted by the second light source unit 220 is emitted from the opening portion 210c of the second housing 210.

[0028] Of the longitudinal ends of the second housing 210, the second end 210b is adjacent to the first lighting fixture 100 in the connected state. That is, in the connected state, the second end 210b and the first end 110a of the first housing 110 are adjacent to each other. On the other hand, of the longitudinal ends of the second housing 210, the first end 210a is an end farther from the first lighting fixture 100 than the second end 210b in the connected state. Similar to the first housing 110, the first end 210a and the second end 210b of the second housing 210 are open.

[0029] The second housing closing portion 230 is, for example, an end cap. The second housing closing portion 230 is attached to the first end 210a and closes the open first end 210a, similarly to the first housing closing portion 130. The second housing closing portion 230 preferably has light-shielding properties.

[0030] The connecting member 10 includes a base portion 20 and at least one wall portion 30.

[0031] The base portion 20 extends in the first direction D1. In the connected state, the base portion 20 faces the first housing base portion 111 and the second housing base portion 211. Specifically, in the connected state, the base portion 20 faces the inner surfaces of the first housing base portion 111 and the second housing base portion 211. That is, in the connected state, the first housing base portion 111 and the second housing base portion 211 extend in the first direction D1 in the same manner as the base portion 20. Further, in the present embodiment, the first lighting fixture 100 and the second lighting fixture 200 are adjacent to each other in the first direction D1 in the connected state.

[0032] At least one wall portion 30 extends from the base portion 20 in the second direction D2. The second direction D2 intersects the first direction D1. In the present embodiment, the second direction D2 is orthogonal to the first direction D1. The wall portion 30 faces the first housing wall portion 112 and the second housing wall portion 212 in the connected state. Specifically, the wall portion 30 faces the inner surfaces of the first housing wall portion 112 and the second housing wall portion 212 in the connected state. That is, in the connected state, the first housing wall portion 112 and the second housing wall portion 212 extend in the second direction D2 in the same manner as the wall portion 30. Specifically, in the connected state, each of the two first housing wall portions 112 extends from the first housing base portion 111 in the second direction D2. Further, in the connected state, each of the two second housing wall portions 212 extends from the second housing base portion 211 in the second direction D2.

[0033] Here, in the connected state, the two first housing wall portions 112 face each other in a third direction D3 that intersects the first direction D1 and the second direction D2. Further, the two second housing wall portions 212 face each other in the third direction D3. In the present embodiment, the third direction D3 is orthogonal to the first direction D1 and the second direction D2.

[0034] Each of the base portion 20 and the wall portion 30 of the connecting member 10 straddles the first housing 110 and the second housing 210. Therefore, even if a gap is formed between the connected first housing 110 and second housing 210, it is possible to suppress light emitted from at least one of the first light source unit 120 accommodated in the first housing 110 and the second light source unit 220 accommodated in the second housing 210 from leaking through the gap. As a result, it is possible to suppress light from leaking between the connected first lighting fixture 100 and second lighting fixture 200.

[0035] Further, the connecting member 10 connects the first housing 110 and the second housing 210 across them. Therefore, the position of the second housing 210 with respect to the first housing 110 is fixed as compared with the case where the connecting member 10 does not connect the first housing 110 and the second housing 210. That is, in the lighting system 1, the position of the second housing 210 with respect to the first housing 110 is fixed as compared with the case where the first housing 110 and the second housing 210 are connected without providing a connecting member. As a result, it is possible to suppress the position of the second lighting fixture 200 from shifting in the second direction D2 or the third direction D3 with respect to the position of the first lighting fixture 100.

[0036] In addition, as compared with the case where the connecting member 10 does not connect the first housing 110 and the second housing 210, it is possible to suppress the extending direction of the second lighting fixture 200 from tilting with respect to the extending direction of the first lighting fixture 100. Specifically, starting from the boundary portion between the first end portion 110a of the first housing 110 and the second end portion 210b of the second housing 210, it is possible to suppress the second lighting fixture 200 from tilting to the right side in the figure, tilting to the left side in the figure, tilting upward in the figure, or tilting downward in the figure. Also, it is possible to suppress at least one of the extending direction of the first lighting fixture 100 and the extending direction of the second lighting fixture 200 from tilting with respect to the first direction D1.

[0037] In the connected state, the connecting member 10 covers a part of the first light source unit 120 and a part of the second light source unit 220. Specifically, in the connected state, the connecting member 10 covers a part of the first light source unit 120 adjacent to the second light source unit 220 and a part of the second light source unit 220 adjacent to the first light source unit 120. Therefore, even when the position of the second housing 210 is displaced in the first direction D1 with respect to the position of the first housing 110 and a gap is formed between the first housing 110 and the second housing 210, it is possible to suppress light emitted from at least one of the first light source unit 120 and the second light source unit 220 from leaking from between the first housing 110 and the second housing 210. As a result, it is possible to further suppress light from leaking between the first lighting fixture 100 and the second lighting fixture 200.

[0038] In the present embodiment, each of the base portion 20 and the wall portion 30 has light-shielding properties. Therefore, it is possible to prevent light emitted from at least one of the first light source unit 120 and the second light source unit 220 from leaking through the base portion 20 and the wall portion 30. As a result, even if a gap is formed between the first housing 110 and the second housing 210, it is possible to more reliably prevent light emitted from at least one of the first light source unit 120 accommodated in the first housing 110 and the second light source unit 220 accommodated in the second housing 210 from leaking through the gap.

[0039] Here, in the present embodiment, it is preferable that each of the inner surface of the base portion 20 and the inner surface of the wall portion 30 is configured to reflect light emitted by at least one of the first light source unit 120 and the second light source unit 220. The configuration for reflecting light is, for example, a configuration having a color that easily reflects light. Specifically, the configuration for reflecting light is, for example, a configuration formed of a white material, a configuration with white painting, or a configuration that is a mirror surface. The white material is, for example, resin. Therefore, the light efficiency of the lighting system 1 can be improved as compared with the case where each of the inner surface of the base portion and the inner surface of the wall portion is a configuration that hardly reflects light. The configuration that hardly reflects light is, for example, a configuration having a color that easily absorbs light. Specifically, the configuration that hardly reflects light is, for example, a configuration formed of a black material or a configuration with black painting.

[0040] Also, in the present embodiment, each of the first housing 110 and the second housing 210 has light-shielding properties. Therefore, it is possible to prevent light emitted by at least one of the first light source unit 120 and the second light source unit 220 from leaking through the first housing wall portion 112 and the second housing wall portion 212. As a result, the light emitted from the opening portion 110c can be made prominent.

[0041] Here, in the present embodiment, it is preferable that each of the inner surface of the first housing 110 and the inner surface of the second housing 210 is configured to reflect light emitted by at least one of the first light source unit 120 and the second light source unit 220. The configuration for reflecting light is, for example, a configuration having a color that easily reflects light. Specifically, the configuration for reflecting light is, for example, a configuration formed of a white material, a configuration with white painting, or a configuration that is a mirror surface. The white material is, for example, resin. Therefore, the light efficiency of the lighting system 1 can be improved as compared with the case where each of the inner surface of the first housing and the inner surface of the second housing is a configuration that hardly reflects light. The configuration that hardly reflects light is, for example, a configuration having a color that easily absorbs light. Specifically, the configuration that hardly reflects light is, for example, a configuration formed of a black material or a configuration with black painting.

[0042] Hereinafter, in this embodiment, for the sake of facilitating the understanding of the invention, in the connected state, the side where the first housing 110 is arranged is defined as the "left side", and the side where the second housing 210 is arranged is defined as the "right side", thereby defining the left - right direction. That is, in this embodiment, the left - right direction corresponds to the first direction D1. Also, in the second direction D2 in which the wall portion 30 of the connecting member 10 extends, the side where the proximal end side of the wall portion 30 is arranged is defined as the "upper side", and the side where the distal end of the wall portion 30 is arranged is defined as the "lower side", thereby defining the up - down direction. That is, in this embodiment, the direction from the upper side to the lower side corresponds to the second direction D2. Further, looking at the lighting system 1 with the first housing 110 arranged on the left side and the second housing 210 arranged on the right side, the front side is defined as the "front side", and the opposite side is defined as the "rear side", thereby defining the front - rear direction. That is, in this embodiment, the front - rear direction corresponds to the third direction D3. That is, FIG. 1 shows the lighting system 1 viewed from the lower left - front. However, these orientations do not limit the orientations during the manufacturing, construction, and use of the lighting system 1 of the present invention.

[0043] Subsequently, referring to FIG. 2, the first lighting fixture 100 of this embodiment will be described. FIG. 2 is an exploded perspective view of the first lighting fixture 100 according to this embodiment. Specifically, FIG. 2 shows the first lighting fixture 100 viewed from the lower left - front. Since the configuration of the first lighting fixture 100 is the same as that of the second lighting fixture 200, the description of the second lighting fixture 200 will be omitted.

[0044] As shown in FIG. 2, the first housing 110 has a substantially U - shaped configuration in side view. Specifically, the first housing 110 has a substantially U - shaped configuration with sharp corners in side view.

[0045] The connecting member 10 is inserted into the interior of the first housing 110 and attached to the first housing 110. Specifically, for example, the connecting member 10 is inserted into the interior of the first housing 110 from the first end portion 110a of the first housing 110 in the direction D4. Also, for example, the connecting member 10 is inserted into the interior of the first housing 110 from the opening portion 110c of the first housing 110 in the direction D5. And, for example, after the connecting member 10 is attached to the first housing 110, the second housing 210 (see FIG. 1) is moved in the direction D6 so that the connecting member 10 is positioned inside the second housing 210, thereby connecting the first housing 110 and the second housing 210. Note that, for example, after the first housing 110 and the second housing 210 are arranged side by side, the connecting member 10 may be inserted into the interiors of the first housing 110 and the second housing 210 from the opening portion 110c and the opening portion 210c in the direction D5.

[0046] The first light source unit 120 includes a light emitting portion 122, a frame member 170, a power supply device 140, two mounting brackets 150, a first terminal block 160a, a second terminal block 160b, a first cover closing member 180a, and a second cover closing member 180b.

[0047] The light emitting portion 122 has a wiring board 122a and a plurality of light sources 122b.

[0048] In the connected state, the wiring board 122a has a substantially rectangular shape that is long in the first direction D1. Also, in the present embodiment, the wiring board 122a has a substantially flat plate shape.

[0049] The light source 122b emits light. The light source 122b of the present embodiment has an LED (Light Emitting Diode) element as a light emitting element. More specifically, the light source 122b is, for example, an SMD (surface mount device), or a COB (chip on board).

[0050] The light source 122b is mounted on the wiring board 122a. Specifically, the light source 122b is mounted on the wiring board 122a such that the light emitting surface of the light emitting element faces the inner surface of the first light source cover 121. Wiring for supplying power to the light source 122b is formed on the wiring board 122a.

[0051] In the present embodiment, the plurality of light sources 122b are arranged in a row along the first direction D1 in the connected state. However, the arrangement of the plurality of light sources 122b is not limited to a single row. The plurality of light sources 122b may be arranged in two or more rows along the first direction D1, or may be arranged in a staggered pattern.

[0052] The frame member 170 is a plate-like member and has a rectangular shape that is long in the first direction D1 in the connected state. The light emitting unit 122 is attached to the frame member 170. Specifically, the light emitting unit 122 is attached to the lower surface of the frame member 170. More specifically, the light emitting unit 122 is attached to the frame member 170 such that the light source 122b faces the inner surface of the first light source cover 121. The light emitting unit 122 may be adhered to the frame member 170 with an adhesive, for example, or may be fixed to the frame member 170 with a fastening member such as a screw.

[0053] The frame member 170 can be a member made of metal such as aluminum, for example. In the present embodiment, the frame member 170 is made of metal and functions as a heat sink for the light emitting unit 122. The frame member 170 is formed by, for example, an extrusion molding method. By forming the frame member 170 by the extrusion molding method, the cross-sectional shape of the frame member 170 becomes constant from one end to the other end in the longitudinal direction of the frame member 170.

[0054] The first light source cover 121 covers the light emitting part 122. More specifically, the first light source cover 121 is attached to the frame member 170 and covers the light emitting part 122 from below. The first light source cover 121 is, for example, a shade or a diffusion cover. The first light source cover 121 is transparent or translucent and transmits the light emitted from the light emitting part 122. The first light source cover 121 is made of, for example, an opalescent translucent material.

[0055] Specifically, the first light source cover 121 is a rectangular parallelepiped-shaped cylinder that is long in the first direction D1 in the connected state. The first light source cover 121 also has a first cover opening end 121a located on the first end 110a side of the first housing 110 and a second cover opening end 121b located on the second end 110b side of the first housing 110. The first cover opening end 121a and the second cover opening end 121b are open.

[0056] The first light source cover 121 is made of, for example, resin. When the first light source cover 121 is a diffusion cover, the first light source cover 121 may be formed, for example, by molding a resin containing a light diffusion material. Alternatively, the first light source cover 121 may be formed by performing a light diffusion treatment on the surface of a resin molded product molded from a transparent resin. Here, the light diffusion treatment includes, for example, a micro-roughness forming treatment and a light-transmitting white painting treatment. The micro-roughness forming treatment is a treatment for forming minute irregularities on the surface of the resin molded product. The light-transmitting white painting treatment is a treatment for painting the surface of the resin molded product with a light-transmitting opalescent paint.

[0057] The first cover closing member 180a closes the first cover opening end 121a. The first cover closing member 180a is made of, for example, synthetic resin. The second cover closing member 180b closes the second cover opening end 121b. The second cover closing member 180b is made of, for example, synthetic resin.

[0058] The power supply device 140, the first terminal block 160a, and the second terminal block 160b are fixed to the frame member 170. More specifically, the power supply device 140, the first terminal block 160a, and the second terminal block 160b are fixed to the upper surface of the frame member 170. When the first light source unit 120 is housed in the first housing 110, the first terminal block 160a is closer to the first end portion 110a of the first housing 110 than the second terminal block 160b. Further, when the first light source unit 120 is housed in the first housing 110, the second terminal block 160b is closer to the second end portion 110b of the first housing 110 than the first terminal block 160a.

[0059] In the present embodiment, one end of an external power line (not shown) drawn from the outside of the lighting system 1 into the first lighting fixture 100 is connected to one side of the second terminal block 160b. Also, one end of an internal power line (not shown) connecting the second terminal block 160b and the power supply device 140 and one end of an internal power line (not shown) connecting the second terminal block 160b and the first terminal block 160a are connected to the other side of the second terminal block 160b.

[0060] The internal power line connecting the second terminal block 160b and the power supply device 140 transmits the AC voltage transmitted by the external power line to the power supply device 140. The power supply device 140 generates power for causing the light source 122b to emit light from the AC voltage. The power supply device 140 of the present embodiment generates, for example, a DC voltage for causing an LED element to emit light from the AC voltage.

[0061] The internal power line connecting the second terminal block 160b and the first terminal block 160a is drawn into one side of the first terminal block 160a and transmits the AC voltage transmitted by the external power line to the first terminal block 160a.

[0062] An internal power line (not shown) connecting the other side of the first terminal block 160a and a terminal block (not shown) of the second lighting fixture 200 is connected to the other side of the first terminal block 160a. The internal power line connecting the first terminal block 160a and the terminal block of the second lighting fixture 200 transmits the AC voltage transmitted by the external power line to the second lighting fixture 200.

[0063] The two mounting brackets 150 are fixed to the frame member 170. More specifically, the two mounting brackets 150 are fixed to the upper surface of the frame member 170. The two mounting brackets 150 are members for attaching the first light source unit 120 to the first housing 110. The mounting bracket 150 has elasticity, for example. In the present embodiment, one of the two mounting brackets 150 is disposed on the left side of the power supply device 140, and the other of the two mounting brackets 150 is disposed on the right side of the power supply device 140.

[0064] According to the present embodiment, due to the elastic force of the two mounting brackets 150, the first light source unit 120 is attached to the first housing 110. Therefore, the first light source unit 120 is detachable from the first housing 110.

[0065] Next, with reference to FIGS. 3 and 4, the connecting member 10 will be described in detail. FIG. 3 is a perspective view of the connecting member 10 according to the present embodiment. Specifically, FIG. 3 shows the connecting member 10 as viewed from the upper left front. FIG. 4 is a side view of the connecting member 10 according to the present embodiment. Note that FIGS. 3 and 4 show the connecting member 10 in a non-connected state in which the connecting member 10 does not connect the first housing 110 and the second housing 210. In the present embodiment, the connecting member 10 has elasticity.

[0066] As shown in FIGS. 3 and 4, in the present embodiment, the connecting member 10 includes two wall portions 30. Hereinafter, among the two wall portions 30, the wall portion 30 located on the front side may be referred to as the wall portion 30a. Also, among the two wall portions 30, the wall portion 30 located on the rear side may be referred to as the wall portion 30b. Since the configuration of the wall portion 30a is the same as that of the wall portion 30b, the description of the wall portion 30b will be omitted as appropriate.

[0067] The two wall portions 30 face each other in the third direction D3. That is, the wall portion 30a and the wall portion 30b face each other in the third direction D3. Therefore, in the connected state (see FIG. 1), on both the one side (front side) and the other side (rear side) of the lighting system 1, it is possible to suppress light emitted from at least one of the first light source unit 120 and the second light source unit 220 from leaking between the first housing 110 and the second housing 210. As a result, it is possible to more reliably prevent light from leaking between the first lighting fixture 100 and the second lighting fixture 200 in the connected state.

[0068] Further, each of the two wall portions 30 has an inclination with respect to the second direction D2 in the unconnected state. That is, each of the wall portion 30a and the wall portion 30b has an inclination with respect to the second direction D2. Also, the wall portion 30a and the wall portion 30b are not parallel to each other. Specifically, in a side view, the tip 33a of the wall portion 30a is located outside in the third direction D3 compared to the base end 32a of the wall portion 30a. Also, in a side view, the tip 33b of the wall portion 30b is located outside in the third direction D3 compared to the base end 32b of the wall portion 30b.

[0069] More specifically, in the unconnected state, the distance L1 between the base ends 32 of the two wall portions 30 is shorter than the distance L2 between the tips 33 of the two wall portions 30. Specifically, in the unconnected state, the distance L1 between the base end 32a of the wall portion 30a and the base end 32b of the wall portion 30b is shorter than the distance L2 between the tip 33a of the wall portion 30a and the tip 33b of the wall portion 30b. Therefore, when the connecting member 10 is inserted into the interior of the first housing 110 from the opening portion 110c in the direction D5, the connecting member 10 is easy to insert. As a result, the burden on the operator for inserting the connecting member 10 into the interior of the first housing 110 can be reduced.

[0070] The wall portion 30 has an engaging portion 31, a protruding portion 34, and a contact surface 35. Each of the engaging portion 31, the protruding portion 34, and the contact surface 35 extends along the first direction D1. In the present embodiment, the protruding portion 34 is closer to the proximal end 32 of the wall portion 30 than the engaging portion 31 and the contact surface 35 in the second direction D2. The contact surface 35 is closer to the distal end 33 of the wall portion 30 than the engaging portion 31 and the protruding portion 34 in the second direction D2. The engaging portion 31 is located between the protruding portion 34 and the contact surface 35. Hereinafter, the engaging portion 31 of the wall portion 30a may be described as the engaging portion 31a, the protruding portion 34 of the wall portion 30a may be described as the protruding portion 34a, and the contact surface 35 of the wall portion 30a may be described as the contact surface 35a. Also, the engaging portion 31 of the wall portion 30b may be described as the engaging portion 31b, the protruding portion 34 of the wall portion 30b may be described as the protruding portion 34b, and the contact surface 35 of the wall portion 30b may be described as the contact surface 35b.

[0071] The protruding portion 34 has a substantially semi-circular shape in a side view. In the present embodiment, the protruding portion 34 protrudes from the outer surface of the wall portion 30 in the third direction D3. The contact surface 35 is substantially parallel to the base portion 20 in the present embodiment. Specifically, the contact surface 35 is a flat surface extending in the first direction D1 and the third direction D3. The engaging portion 31 is formed by the protruding portion 34 and the contact surface 35. In the present embodiment, the engaging portion 31 has a concave shape. The engaging portion 31 is, for example, a groove portion.

[0072] The connecting member 10 further includes a protruding portion 40 and a first fitting portion 43. In the present embodiment, the connecting member 10 further includes two protruding portions 40 and one first fitting portion 43.

[0073] The protruding portion 40 protrudes from the end portion of the base portion 20 in the first direction D1. Hereinafter, the protruding portion 40 protruding from one end portion 20a on the right side of the base portion 20 in the first direction D1 may be described as the protruding portion 40a, and the protruding portion 40 protruding from the other end portion 20b on the left side of the base portion 20 in the first direction D1 may be described as the protruding portion 40b.

[0074] The protruding portion 40 includes a protruding main body portion 41 and a second fitting portion 42. Specifically, the protruding portion 40a includes a protruding main body portion 41a and a second fitting portion 42a. Further, the protruding portion 40b includes a protruding main body portion 41b and a second fitting portion 42b.

[0075] In the present embodiment, the protruding main body portion 41 protrudes from an end portion of the base portion 20 in the first direction D1. Specifically, the protruding main body portion 41a protrudes from one end portion 20a of the base portion 20. Further, the protruding main body portion 41b protrudes from the other end portion 20b of the base portion 20.

[0076] Also, in the present embodiment, the second fitting portion 42 has a substantially circular shape in a plan view. The second fitting portion 42 protrudes from the protruding main body portion 41 in a direction opposite to the second direction D2. The second fitting portion 42 is an example of a "fitting portion".

[0077] The first fitting portion 43 has a substantially elliptical shape in a plan view. The first fitting portion 43 protrudes from the outer surface 20c of the base portion 20 in a direction opposite to the second direction D2.

[0078] Next, with reference to FIG. 5, the lighting system 1 in a connected state will be described. FIG. 5 is a plan view when the lighting system 1 in the connected state is viewed from the second direction D2.

[0079] As shown in FIG. 5, the first housing base portion 111 of the first housing 110 has a fitting portion 111a, a notch portion 111b, and an opening 111c. In other words, a fitting portion 111a, a notch portion 111b, and an opening 111c are formed in the first housing base portion 111. In the present embodiment, the first housing base portion 111 has two fitting portions 111a, two notch portions 111b, and two openings 111c. In FIG. 5, the fitting portion 111a, the notch portion 111b, and the opening 111c on the first end portion 110a side are shown. In the present embodiment, the first housing base portion 111 also has a fitting portion 111a, a notch portion 111b, and an opening 111c on the second end portion 110b side in the same manner.

[0080] The notch portion 111b is located at the first end portion 110a of the first housing 110. The opening 111c is farther from the first end portion 110a than the fitting portion 111a and the notch portion 111b in the first direction D1. The fitting portion 111a is located between the notch portion 111b and the opening 111c in the first direction D1. The fitting portion 111a is an example of a "first housing fitting portion".

[0081] Further, the second housing base portion 211 of the second housing 210 has a fitting portion 211a, a notch portion 211b, and an opening 211c. In other words, the fitting portion 211a, the notch portion 211b, and the opening 211c are formed in the second housing base portion 211. In the present embodiment, the second housing base portion 211 has two fitting portions 211a, two notch portions 211b, and two openings 211c. FIG. 5 shows the fitting portion 211a, the notch portion 211b, and the opening 211c on the second end portion 210b side. In the present embodiment, the second housing base portion 211 similarly has a fitting portion 211a, a notch portion 211b, and an opening 211c also on the first end portion 210a side.

[0082] The notch portion 211b is located at the second end portion 210b of the second housing 210. The opening 211c is farther from the second end portion 210b than the fitting portion 211a and the notch portion 211b in the first direction D1. The fitting portion 211a is located between the notch portion 211b and the opening 211c in the first direction D1.

[0083] The second fitting portion 42a and the second fitting portion 42b of the connecting member 10 are respectively fitted to the fitting portion 111a of the first housing 110 and the fitting portion 211a of the second housing 210 in the connected state. Specifically, the second fitting portion 42b is fitted to the fitting portion 111a of the first housing 110 in the connected state. Therefore, the connecting member 10 can be attached to the first housing 110 and the second housing 210 without using a coupling tool such as a screw. As a result, when removing the connecting member 10 from at least one of the first housing 110 and the second housing 210 without performing the operation of removing the coupling tool, the lighting fixture can be removed from the ceiling surface, and the work becomes easy.

[0084] Furthermore, in the connected state, the attachability of the connecting member 10 to the first housing 110 is stabilized. Also, the second fitting portion 42a fits into the fitting portion 211a of the second housing 210 in the connected state. Therefore, in the connected state, the attachability of the connecting member 10 to the second housing 210 is further stabilized. As a result, the stability of the connected state of the lighting system 1 can be improved.

[0085] The notch portion 111b has a substantially U-shaped in plan view. Also, the notch portion 211b has a substantially U-shaped in plan view. In the connected state, the notch portion 111b of the first housing 110 and the notch portion 211b of the second housing 210 constitute the opening 1h. That is, in the connected state, the lighting system 1 has the opening 1h. Also, in the connected state, the first fitting portion 43 of the connecting member 10 fits into the opening 1h. Therefore, it is possible to suppress the displacement of the position of the second housing 210 relative to the position of the first housing 110 in the first direction D1 or in the third direction D3. As a result, the displacement of the position of the second housing 210 relative to the first housing 110 can be suppressed.

[0086] For example, a cord Cd (see FIG. 9) for suspending the lighting system 1 from the ceiling is inserted into the opening 111c of the first housing 110 and the opening 211c of the second housing 210.

[0087] Next, with reference to FIGS. 6 and 7, the engagement between the connecting member 10, the first housing 110, and the second housing 210 will be described. FIG. 6 is a cross-sectional view of the lighting system 1 taken along line VI-VI of FIG. 1. FIG. 7 is a cross-sectional view of the lighting system 1 taken along line VII-VII of FIG. 5. Since the configurations of the first housing 110 and the second housing 210 are the same, the description of the engagement between the connecting member 10 and the second housing 210 will be omitted as appropriate. Also, for simplification of the drawing, in FIG. 7, the description of the first light source unit 120 and the second light source unit 220 is omitted.

[0088] As shown in FIG. 6, each of the two first housing wall portions 112 extends from the first housing base portion 111 along the second direction D2. That is, the two first housing wall portions 112 are parallel to each other. Hereinafter, among the two first housing wall portions 112, the first housing wall portion 112 located on the front side may be referred to as the first housing wall portion 112a. Also, among the two first housing wall portions 112, the first housing wall portion 112 located on the rear side may be referred to as the first housing wall portion 112b.

[0089] The distance L3 between the two first housing wall portions 112 is longer than the distance L1 between the tips 33 of the two wall portions 30. Therefore, it is easy to insert the connecting member 10 into the interior of the first housing 110 from the opening portion 110c of the first housing 110. As a result, the burden on the operator for attaching the connecting member 10 to the first housing 110 can be reduced.

[0090] Also, in the present embodiment, the distance L3 between the two first housing wall portions 112 is shorter than the distance L2 between the tips 33 of the two wall portions 30 in the unconnected state (see FIG. 4). Therefore, in the connected state, the tips 33 of the two wall portions 30 have a biasing force toward the inner surface 119 of the first housing wall portion 112 and the inner surface 219 of the second housing wall portion 212 (see FIG. 7). As a result, the connecting member 10 is more stably attached to the first housing 110 and the second housing 210 than when the two wall portions 30 do not have a biasing force toward the inner surface 119 of the first housing wall portion 112 and the inner surface 219 of the second housing wall portion 212. As a result, the stability of the connected state can be improved.

[0091] As shown in FIGS. 6 and 7, in the present embodiment, the first housing 110 further includes at least one first engaging portion 114. The first engaging portion 114 is provided on the inner surface 119 of the first housing wall portion 112 and extends along the first direction D1. In the present embodiment, the first engaging portion 114 protrudes from the inner surface 119 of the first housing wall portion 112 in the third direction D3. Specifically, the first engaging portion 114 protrudes from the inner surface 119 of the first housing wall portion 112 toward the interior of the first housing 110. That is, in the present embodiment, the first engaging portion 114 has, for example, a convex shape.

[0092] In this embodiment, the first housing 110 includes two first engaging portions 114. Hereinafter, among the two first engaging portions 114, the first engaging portion 114 provided on the inner surface 119a of the first housing wall portion 112a may be referred to as the first engaging portion 114a. Also, among the two first engaging portions 114, the first engaging portion 114 provided on the inner surface 119b of the first housing wall portion 112b may be referred to as the first engaging portion 114b.

[0093] Further, in this embodiment, the second housing 210 further includes at least one second engaging portion 214, similar to the first housing 110. Specifically, the second housing 210 further includes two second engaging portions 214. The second engaging portion 214 is provided on the inner surface 219 of the second housing wall portion 212 and extends along the first direction D1. Also, the second engaging portion 214 protrudes in the third direction D3 from the inner surface 219 of the second housing wall portion 212. Specifically, the second engaging portion 214 protrudes from the inner surface 219 of the second housing wall portion 212 toward the inside of the second housing 210. That is, in this embodiment, the second engaging portion 214 has, for example, a convex shape. In FIG. 7, only the rear second housing wall portion 212b among the two second housing wall portions 212 is illustrated. That is, in FIG. 7, only one of the two second engaging portions 214, i.e., the second engaging portion 214b, is illustrated.

[0094] The engaging portion 31 of the connecting member 10 engages with the first engaging portion 114 of the first housing 110 and the second engaging portion 214 of the second housing 210. Therefore, with respect to the connecting member 10, at least one of the first housing 110 and the second housing 210 can be suppressed from shifting in the second direction D2. As a result, the displacement between the first lighting fixture 100 and the second lighting fixture 200 can be suppressed more accurately.

[0095] In this embodiment, the engaging portion 31a engages with the first engaging portion 114a and the second engaging portion 214a, and the engaging portion 31b engages with the first engaging portion 114b and the second engaging portion 214b. Therefore, with respect to the connecting member 10, at least one of the first housing 110 and the second housing 210 can be more reliably suppressed from shifting in the second direction D2. As a result, the displacement between the first lighting fixture 100 and the second lighting fixture 200 can be suppressed more accurately.

[0096] In this embodiment, the first engaging portion 114 has an inclined surface 115a and an opposing surface 115b.

[0097] The opposing surface 115b faces the first housing base portion 111 in the unconnected state. In this embodiment, the opposing surface 115b is a surface extending in the first direction D1 and the third direction D3. The inclined surface 115a is inclined with respect to the opposing surface 115b. Specifically, the inclined surface 115a is inclined with respect to the opposing surface 115b so as to approach the inner surface 119 of the first housing wall portion 112 as it approaches the tip 113 of the first housing wall portion 112. Therefore, when the connecting member 10 is pushed into the first housing 110 in a direction opposite to the second direction D2 inside the first housing 110, the proximal end 32 side of the wall portion 30 of the connecting member 10 is guided by the inclined surface 115a. As a result, the connecting member 10 can be easily attached to the first housing 110.

[0098] Further, in this embodiment, the first housing 110 further includes at least one claw portion 116. The claw portion 116 is located at the tip 113 of the first housing wall portion 112 and protrudes toward the inside of the first housing 110. Specifically, the claw portion 116 protrudes from the inner surface 119 of the first housing wall portion 112 of the first housing 110 in the third direction D3. Further, the claw portion 116 extends along the first direction D1.

[0099] In this embodiment, the first housing 110 includes two claw portions 116. Hereinafter, among the two claw portions 116, the claw portion 116 located at the tip 113a of the first housing wall portion 112a may be referred to as the claw portion 116a. Also, among the two claw portions 116, the claw portion 116 located at the tip 113b of the first housing wall portion 112b may be referred to as the claw portion 116a.

[0100] The second housing 210, similar to the first housing 110, further includes at least one claw portion 216. In this embodiment, the second housing 210 further includes two claw portions 216. Note that in FIG. 7, only one of the two claw portions 216, the claw portion 216b, is illustrated.

[0101] In the connected state, the claw portion 116 of the first housing 110 is farther from the first housing base portion 111 than the tip 33 of the wall portion 30 of the connecting member 10. Specifically, in the connected state, the claw portion 116a is farther from the first housing base portion 111 than the tip 33a of the wall portion 30a. Also, in the connected state, the claw portion 116b is farther from the first housing base portion 111 than the tip 33b of the wall portion 30b. Therefore, when viewing the illumination system 1 from the tip 33 side of the wall portion 30, the connecting member 10 is hidden by the claw portion 116. As a result, the aesthetic appearance of the illumination system 1 in the connected state is improved.

[0102] Also, the claw portion 116 has an opposing surface 118 and an inclined surface 117.

[0103] The opposing surface 118 faces the wall portion 30 of the connecting member 10 in the connected state. In the present embodiment, the opposing surface 118 extends in the first direction D1 and the second direction D2. Note that in FIG. 6, a gap is formed between the tip 33 of the wall portion 30 and the opposing surface 118, but the tip 33 of the wall portion 30 and the opposing surface 118 may be in contact with each other.

[0104] The inclined surface 117 is inclined with respect to the opposing surface 118. Specifically, the inclined surface 117 is inclined with respect to the opposing surface 118 so as to approach the inner surface 119 of the first housing wall portion 112 as it approaches the tip 113 of the first housing wall portion 112. Therefore, when inserting the connecting member 10 into the interior of the first housing 110 from the open portion 110c of the first housing 110 in a direction opposite to the second direction D2, the base end 32 side of the wall portion 30 of the connecting member 10 is guided by the inclined surface 117, and the connecting member 10 can be inserted in the second direction D2. As a result, the burden on the operator when attaching the connecting member 10 to the first housing 110 can be further reduced.

[0105] Furthermore, in the present embodiment, the connecting member 10 further has, for example, at least one restricting portion 37. The restricting portion 37 protrudes from the inner surface of the wall portion 30 in the third direction D3 and is a surface extending in the first direction D1 and the third direction D3. In the present embodiment, the connecting member 10 has two restricting portions 37. Hereinafter, among the two restricting portions 37, the restricting portion 37 extending in the third direction D3 from the inner surface of the wall portion 30a may be described as the restricting portion 37a. Also, among the two restricting portions 37, the restricting portion 37 extending in the third direction D3 from the inner surface of the wall portion 30b may be described as the restricting portion 37b.

[0106] The first light source cover 121 has an opposing surface 121e. The opposing surface 121e faces the light emitting portion 122. The opposing surface 121e is a surface extending in the first direction D1 and the third direction D3. Also, when the first light source unit 120 is housed in the first housing 110, the opposing surface 121e of the first light source cover 121 faces the opening portion 110c of the first housing 110.

[0107] In the present embodiment, when the first light source unit 120 is housed in the first housing 110, the first end portion 121c in the direction opposite to the second direction D2 of the first light source cover 121 is located on the side of the wall portion 30a, and the second end portion 121d is located on the side of the wall portion 30b. The first end portion 121c and the second end portion 121d extend in the first direction D1. Also, the first end portion 121c and the second end portion 121d face the opposing surface 121e.

[0108] When attaching the first light source unit 120 to the first housing 110 in the connected state, each of the first end portion 121c and the second end portion 121d of the first light source cover 121 faces the restricting portion 37. Specifically, the first end portion 121c faces the restricting portion 37a. Also, the second end portion 121d faces the restricting portion 37b. Therefore, when attaching the first light source unit 120 to the first housing 110 in the connected state, the movement of the first light source unit 120 in the direction opposite to the second direction D2 can be restricted. As a result, it is possible to prevent the opposing surface 121e of the first light source cover 121 from separating from the opening portion 110c of the first housing 110 in the direction opposite to the second direction D2.

[0109] As shown in FIG. 7, in the connected state, the tip of the protruding portion 40 is inclined with respect to the first direction D1. Specifically, in the connected state, the protruding main body portion 41 is inclined with respect to the first direction D1. When the connecting member 10 connects the first housing 110 and the second housing 210, the connecting member 10 can be easily removed from the first housing 110 and the second housing 210.

[0110] More specifically, a gap is formed between the tip of the protruding main body portion 41a and the second housing base portion 211. Therefore, when the connecting member 10 is attached to the second housing 210, the connecting member 10 can be easily removed from the second housing 210. Also, a gap is formed between the tip of the protruding main body portion 41b and the first housing base portion 111. Therefore, when the connecting member 10 is attached to the first housing 110, the connecting member 10 can be easily removed from the first housing 110.

[0111] Next, with reference to FIG. 6, the engagement between the first light source cover 121 and the frame member 170 will be described.

[0112] In the present embodiment, the frame member 170 includes two edge portions 171 and a main body portion 172. The light emitting portion 122 is attached to the main body portion 172. Each of the two edge portions 171 protrudes from the main body portion 172 in the third direction D3 and further extends along the second direction D2.

[0113] Also, in the present embodiment, the first light source cover 121 includes two engagement portions 121f. The two engagement portions 121f each extend from the first end portion 121c or the second end portion 121d in a direction opposite to the second direction D2, further extend in the third direction D3 so as to be away from the inner surface of the wall portion 30, and further extend in the second direction D2. By the two engagement portions 121f engaging with the two edge portions 171 respectively, the first light source cover 121 is attached to the frame member 170.

[0114] Next, with reference to FIGS. 8 and 9, the protection member 300 will be described. FIG. 8 is a perspective view showing the protection member 300. Specifically, FIG. 8 shows the protection member 300 as viewed from above and obliquely in front on the right side. FIG. 9 is a cross-sectional view of the illumination system 1 taken along line IX-IX in FIG. 8. Note that FIG. 8 shows a state where the protection member 300 is not attached to the opening 111c, while FIG. 9 shows a state where the protection member 300 is attached to the opening 111c.

[0115] The protection member 300 is attached to the opening 111c. The protection member 300 has elasticity, for example. In the present embodiment, the protection member 300 is made of resin (for example, rubber or silicone), for example. The protection member 300 includes a base portion 310 and a cylindrical portion 320. In the attached state where the protection member 300 is attached to the opening 111c (FIG. 9), the base portion 310 faces the inner surface of the first housing base portion 111 of the first housing 110. Also, in the attached state, the cylindrical portion 320 protrudes from the base portion 310 in a direction opposite to the second direction D2. That is, in the attached state, the cylindrical portion 320 protrudes from the base portion 310 in a direction opposite to the second direction D2 toward the outside of the first housing 110. In the attached state, the cylindrical portion 320 is located inside the opening 111c. In the present embodiment, the cylindrical portion 320 has a substantially cylindrical shape. However, the shape of the cylindrical portion 320 is not particularly limited, and for example, it may have a substantially rectangular cylindrical shape. Also, the shape of the cylindrical portion 320 and the shape of the opening 111c may be different.

[0116] The base portion 310 includes a base portion main body 311 and a stepped portion 312. In the present embodiment, the base portion main body 311 has a substantially rectangular shape. Specifically, the base portion main body 311 has a substantially rectangular shape. However, the shape of the base portion main body 311 is not particularly limited, and for example, it may have a substantially polygonal shape or a substantially circular shape. The stepped portion 312 protrudes from the main surface on the side where the cylindrical portion 320 is located among the pair of main surfaces of the base portion main body 311. In the present embodiment, the stepped portion 312 surrounds the base end of the cylindrical portion 320. That is, in the present embodiment, the stepped portion 312 has a substantially annular shape. Note that the shape of the stepped portion 312 is determined according to the shape of the cylindrical portion 320. In the present embodiment, the protective member 300 is integrally formed, for example. However, the base portion 310 and the cylindrical portion 320 may be separate members. More specifically, at least a part of the base portion main body 311, the stepped portion 312, and the cylindrical portion 320 may be integrally formed or may be separate members.

[0117] In the present embodiment, the first housing 110 further includes a protruding portion 1121a, a protruding portion 1121b, a groove portion 1122a, and a groove portion 1122b.

[0118] The protruding portion 1121a is provided on the inner surface 119a of the first housing wall portion 112a and extends along the first direction D1. In the present embodiment, the protruding portion 1121a protrudes from the inner surface 119a in the third direction D3. Specifically, the protruding portion 1121a protrudes from the inner surface 119a toward the inside of the first housing 110. That is, in the present embodiment, the protruding portion 1121a has a convex shape, for example. The protruding portion 1121b is provided on the inner surface 119b of the first housing wall portion 112b and extends along the first direction D1. In the present embodiment, the protruding portion 1121b protrudes from the inner surface 119b in the third direction D3. Specifically, the protruding portion 1121b protrudes from the inner surface 119b toward the inside of the first housing 110. That is, in the present embodiment, the protruding portion 1121b has a convex shape, for example.

[0119] The groove portion 1122a is formed by the first housing base portion 111 and the protruding portion 1121a. In the present embodiment, the groove portion 1122a has a concave shape. The groove portion 1122a extends along the first direction D1. On the other hand, the groove portion 1122b is formed by the first housing base portion 111 and the protruding portion 1121b. In the present embodiment, the groove portion 1122b has a concave shape. The groove portion 1122b extends along the first direction D1.

[0120] The protection member 300 is inserted into the first housing 110 and attached to the opening 111c. Specifically, for example, the protection member 300 is inserted into the groove portion 1122a and the groove portion 1122b, and is slid in the direction D7 with respect to the groove portion 1122a and the groove portion 1122b. At this time, the cylindrical portion 320 is compressed and deformed, for example. When the protection member 300 is slid until the cylindrical portion 320 reaches a position facing the opening 111c in the second direction D2, the cylindrical portion 320 returns to its original shape, and the protection member 300 is attached to the opening 111c.

[0121] Here, among the sides constituting the base portion main body 311 of the protection member 300, the length L4 of one side 311a is different from the length L5 of the other side 311b adjacent to the side 311a. Therefore, by changing the orientation of the protection member 300 according to the length of the first housing 110 along the third direction D3, the protection member 300 can be attached to the opening 111c of the first housing 110 having different sizes. Note that, for example, the side 311a and the side 311b are substantially orthogonal.

[0122] In a state where the protection member 300 is attached to the opening 111c, a cord Cd for suspending the illumination system 1 from the ceiling is inserted through the cylindrical portion 320. Therefore, even if the surface of the opening 111c is rough, at least a part of the opening 111c is covered by the protection member 300, so that it is possible to prevent the cord Cd from being damaged by contacting the opening 111c. Further, even when processing such that the cord Cd is not damaged with respect to the opening 111c cannot be performed due to the small wall thickness of the first housing base portion 111, at least a part of the opening 111c is covered by the protection member 300, so that it is possible to prevent the cord Cd from being damaged by the opening 111c. Processing such that the cord Cd is not damaged with respect to the opening 111c is, for example, processing for smoothing the surface of the opening 111c or rounding the corners of the opening 111c. Furthermore, in the present embodiment, in order to perform processing such that the cord Cd is not damaged with respect to the opening 111c, it is possible to prevent the cord Cd from being damaged by the opening 111c without increasing the wall thickness of the first housing base portion 111. As a result, it is possible to reduce the cost required to increase the wall thickness of the first housing base portion 111.

[0123] In the present embodiment, in a state where the protection member 300 is attached to the opening 111c, the tip of the cylindrical portion 320 is located inside the first housing 110 rather than the outer surface of the first housing base portion 111. However, the tip of the cylindrical portion 320 and the outer surface of the first housing base portion 111 may be substantially flush. Therefore, since the protection member 300 is not located outside the first housing 110, the appearance of the illumination system 1 is improved. Further, when the illumination system 1 is directly attached to, for example, a ceiling surface, a wall surface, or a floor surface, it is possible to prevent a gap from being formed between the first housing 110 and the ceiling surface, the wall surface, or the floor surface due to the tip of the cylindrical portion 320 being located outside the outer surface of the first housing base portion 111. As a result, for example, it is possible to prevent the illumination system 1 from tilting with respect to the ceiling surface, the wall surface, or the floor surface.

[0124] Also, in the present embodiment, in a state where the protection member 300 is attached to the opening 111c, the step portion 312 is located in a gap between the base portion main body 311 and the inner surface of the first housing base portion 111. Therefore, in a state where the protection member 300 is attached to the opening 111c, it is possible to suppress the position of the protection member 300 with respect to the position of the opening 111c from shifting in the second direction D2 or in the direction opposite to the second direction D2. For example, it is possible to suppress rattling of 300 in the groove. Further, without increasing the thickness of the base portion main body 311, it is possible to suppress displacement of the protection member 300. Since the thickness of the base portion main body 311 can be reduced, it is easy to insert the base portion main body 311 into the groove portion 1122a and the groove portion 1122b. However, the base portion 310 may not include the step portion 312. In this case, by increasing the thickness of the base portion main body 311 so that the base portion main body 311 fits into the groove portion 1122a and the groove portion 1122b, it is possible to suppress the position of the protection member 300 from shifting in the second direction D2 or in the direction opposite to the second direction D2.

[0125] As described above, with reference to FIGS. 8 and 9, the protection member 300 attached to the opening 111c located on the first end portion 110a side of the first housing 110 has been described (see FIG. 5). When the first housing base portion 111 has two openings 111c, the protection member 300 is similarly attached to the opening 111c on the second end portion 110b side of the first housing 110. Further, the protection member 300 is similarly attached to the opening 211c located on the second end portion 210b side of the second housing 210. Furthermore, when the second housing base portion 211 has two openings 211c, the protection member 300 is similarly attached to the opening 211c on the first end portion 210a side of the second housing 210.

[0126] As described above, the embodiments of the present invention have been described with reference to the drawings. However, the present invention is not limited to the above-described embodiments, and can be implemented in various aspects without departing from the gist thereof. Further, a plurality of components disclosed in the above embodiments can be modified as appropriate.

[0127] In addition, for the purpose of facilitating the understanding of the invention, the drawings schematically show each component mainly. The thickness, length, number, interval, etc. of each illustrated component may be different from the actual ones for the convenience of drawing preparation. Also, it goes without saying that the configuration of each component shown in the above embodiment is an example and is not particularly limited, and various changes can be made without substantially departing from the effects of the present invention.

[0128] In this embodiment, the lighting system 1 includes a first lighting fixture 100 and a second lighting fixture 200. However, the lighting system 1 may include three or more lighting fixtures. In this case, the lighting system 1 includes a number of connecting members 10 that is one less than the number of lighting fixtures.

[0129] Also, in this embodiment, the engaging portion 31 of the connecting member 10 has a concave shape, and the first engaging portion 114 of the first housing 110 and the second engaging portion 214 of the second housing 210 have a convex shape. However, as long as the engaging portion 31 engages with the first engaging portion 114 and the second engaging portion 214, the engaging portion 31 of the connecting member 10 may have a convex shape, and the first engaging portion 114 of the first housing 110 and the second engaging portion 214 of the second housing 210 may have a concave shape. Also, among the two engaging portions 31, either one of the engaging portions 31 may have a convex shape and the other engaging portion 31 may have a concave shape. In this case, the first engaging portion 114 and the second engaging portion 214 facing the engaging portion 31 having a convex shape have a concave shape, and the first engaging portion 114 and the second engaging portion 214 facing the engaging portion 31 having a concave shape have a convex shape.

[0130] Furthermore, in this embodiment, the first housing 110 includes two first engaging portions 114. However, the first housing 110 may include one first engaging portion 114. For example, when the connecting member 10 includes one wall portion 30, one first engaging portion 114 is located on the inner surface 119 of the first housing wall portion 112 on the side of the first housing 110 facing the wall portion 30 of the connecting member 10.

[0131] Furthermore, in the present embodiment, the first lighting fixture 100 and the second lighting fixture 200 have a substantially rectangular parallelepiped shape. However, as long as the first housing 110 and the second housing 210 are connected by the connecting member 10, at least one of the first lighting fixture 100 and the second lighting fixture 200 may have a shape different from the rectangular parallelepiped shape. For example, at least one of the first lighting fixture 100 and the second lighting fixture 200 may have a substantially cubic shape, a substantially cylindrical shape, or a substantially polygonal cylindrical shape.

[0132] Furthermore, in the present embodiment, for example, a cord Cd for suspending the lighting system 1 from the ceiling is inserted through the opening 111c of the first housing 110 and the opening 211c of the second housing 210. However, an external power line (not shown) drawn from the outside of the lighting system 1 into the first lighting fixture 100 may be inserted through the opening 111c of the first housing 110. Also, an external power line (not shown) drawn from the outside of the lighting system 1 into the second lighting fixture 200 may be inserted through the opening 211c of the second housing 210.

[0133] This application further discloses the following supplementary notes. Note that the following supplementary notes do not limit the present invention.

[0134] [Supplementary Note 1] A connecting member that connects a first housing included in the first lighting fixture and having a first housing base portion and a first housing wall portion, and a second housing included in the second lighting fixture and having a second housing base portion and a second housing wall portion, In a connected state where the connecting member connects the first housing and the second housing, a base portion facing the first housing base portion and the second housing base portion, Extending from the base portion in a second direction intersecting a first direction in which the base portion extends, and at least one wall portion facing the first housing wall portion and the second housing wall portion in the connected state Comprising, Each of the base portion and the wall portion is a connecting member straddling the first housing and the second housing.

[0135] [Appendix 2] Comprising the two wall portions, The two wall portions face each other in a third direction intersecting the first direction and the second direction, and the connecting member according to Appendix 1.

[0136] [Appendix 3] In a non-connected state where the connecting member does not connect the first housing and the second housing, the distance between the proximal ends of the two wall portions is shorter than the distance between the distal ends of the two wall portions, and the connecting member according to Appendix 2.

[0137] [Appendix 4] The wall portion has an engaging portion extending along the first direction, The engaging portion engages with a first engaging portion provided on the inner surface of the first housing wall portion and extending along the first direction and a second engaging portion provided on the inner surface of the second housing wall portion and extending along the first direction, and the connecting member according to any one of Appendices 1 to 3.

[0138] [Appendix 5] Further comprising a protruding portion protruding in the first direction from an end portion of the base portion in the first direction, In the connected state, the tip of the protruding portion is inclined with respect to the first direction, and the connecting member according to any one of Appendices 1 to 4.

[0139] [Appendix 6] The protruding portion includes a fitting portion protruding in a direction opposite to the second direction, In the connected state, the fitting portion fits into a first housing fitting portion formed on the first housing base portion, and the connecting member according to Appendix 5.

[0140] [Appendix 7] Each of the base portion and the wall portion has light-shielding properties, and the connecting member according to any one of Appendices 1 to 6.

[0141] [Appendix 8] The connecting member according to any one of Appendices 1 to 7, The first lighting fixture, The second lighting fixture and A lighting system comprising the same.

[0142] [Appendix 9] The first housing includes Two of the first housing wall portions, and Two claw portions respectively located at the tips of the two first housing wall portions And includes Each of the two claw portions protrudes toward the inside of the first housing, In the connected state, the claw portion is farther from the first housing base portion than the tip of the wall portion of the connecting member, and the lighting system according to Appendix 8.

[0143] [Appendix 10] The claw portion has a facing surface facing the wall portion of the connecting member in the connected state and an inclined surface inclined with respect to the facing surface, and the lighting system according to Appendix 9.

[0144] [Appendix 11] The first housing wall portion has a first engaging portion provided on the inner surface of the first housing wall portion and extending along the first direction, The first engaging portion has a facing surface facing the first housing base portion in a non-connected state where the connecting member does not connect the first housing and the second housing, and an inclined surface inclined with respect to the facing surface, and the lighting system according to any one of Appendices 8 to 10.

[0145] [Appendix 12] Each of the first housing and the second housing has light-shielding properties, and the lighting system according to any one of Appendices 8 to 11.

[0146] [Appendix 13] A protective member to be attached to an opening of a housing of a lighting fixture, In a state where the protective member is attached to the opening, a base portion facing the inner surface of the surface on which the opening of the housing is formed, and A cylindrical portion protruding from the base portion and located inside the opening in the attached state A protective member comprising the same.

Industrial Applicability

[0147] The present invention provides a connecting member and a lighting system, and has industrial applicability.

Explanation of Signs

[0148] 1 Lighting system 10 Connecting member 20 Base part 20a One end part (end part) 30 Wall part 31 Engaging part 32 Base end 33 Tip end 40 Protrusion 42 Second fitting part (fitting part) 100 First lighting fixture 110 First housing 111 First housing base part 111a Fitting part (first housing fitting part) 112 First housing wall part 114 First engaging part 115a Inclined surface 115b Opposing surface 116 Claw part 117 Inclined surface 118 Opposing surface 200 Second lighting fixture 210 Second housing 211 Second housing base part 212 Second housing wall part 214 Second engaging part D1 First direction D2 Second direction D3 Third direction

Claims

1. a connecting member that is inserted into an interior of a first housing and a second housing and connects a first housing included in a first lighting device and having a first housing base portion and a first housing wall portion, and a second housing included in a second lighting device and having a second housing base portion and a second housing wall portion, a base portion facing the first housing base portion and the second housing base portion in a connected state in which the connecting member connects the first housing and the second housing; at least one wall portion extending from the base portion in a second direction intersecting a first direction in which the base portion extends and facing the first housing wall portion and the second housing wall portion in the connected state; Equipped with each of the base portion and the wall portion extends across the first housing and the second housing; A connecting member, wherein a pair of cutout portions extending along the first direction are provided at an end of the base portion in the first direction and cut out from the end in the first direction, and each of the cutout portions is spaced apart from each other in a third direction intersecting the first direction and the second direction, and a portion sandwiched between the pair of cutout portions forms a support piece that supports a fitting portion that fits into a first housing fitting portion formed in the first housing base portion of the first lighting device.

2. A connecting member as described in claim 1, wherein the mating portion protrudes in a direction opposite to the second direction and matings with the first housing mating portion.

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