Connecting member, fitting member, and illuminating system

Abstract

To provide a connecting member, a fitting member, and an illuminating system that can be commonly used for a light source unit having a different structure.SOLUTION: A connecting member 300 connects a first light source unit 120 comprising a first engaged part 711 and extending in a longitudinal direction PD, and a second light source unit 220 comprising a second engaged part 721 and extending in the longitudinal direction PD. The connecting member 300 comprises a first engaging part 311 engaging with the first engaged part 711, and a second engaging part 312 engaging with the second engaged part 721. The connecting member 300 also comprises a third engaging part 331 and a fourth engaging part 332. The third engaging part 331 engages with a third engaged part 1711 of a third light source unit 1120. The fourth engaging part 332 engages with a fourth engaged part 1721 of a fourth light source unit 1220.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a connecting member, a mounting member and a lighting system. [Background technology]

[0002] The lighting device described in Patent Document 1 is long and includes a main body and an LED module (light source unit) attached to the main body. The LED module is composed of two individual LED modules. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2015-53212 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the lighting device described in Patent Document 1, for example, it is considered that the gap between the two LED module units may become larger or smaller due to thermal expansion and thermal contraction. In order to improve this, it is considered to provide a connecting member that connects the two LED module units in the longitudinal direction. However, in order to connect two other LED module units, it is necessary to use a connecting member. In other words, the same number of types of connecting members as the number of types of LED module units are required.

[0005] The same applies to cases where mounting members are attached to individual LED modules, not limited to connection members. In other words, the same number of types of mounting members as the number of types of individual LED modules are required.

[0006] The present invention has been made in consideration of the above problems, and has an object to provide a connecting member, an attachment member, and an illumination system that can be used commonly for light source units having different structures. [Means for solving the problem]

[0007] The connecting member disclosed in the present application connects a first light source unit having a first engaged portion and extending in a first direction, and a second light source unit arranged adjacent to the first light source unit in the first direction and having a second engaged portion and extending in the first direction. The connecting member includes a first engaging portion that engages with the first engaged portion, and a second engaging portion that engages with the second engaged portion. The connecting member further includes a third engaging portion and a fourth engaging portion. The third engaging portion engages with a third engaged portion of the third light source unit having a different shape from the first engaged portion. The fourth engaging portion engages with a fourth engaged portion of the fourth light source unit having a different shape from the third engaged portion. The position of the first engaging portion and the position of the third engaging portion differ in a direction intersecting with the first direction. The position of the second engaging portion and the position of the fourth engaging portion differ in a direction intersecting with the first direction.

[0008] In the connecting member disclosed in the present application, the first light source unit may be detachably attached to a first base member in a second direction intersecting the first direction, and the second light source unit may be detachably attached to a second base member in the second direction. In a state in which the connecting member connects the first light source unit and the second light source unit, a position of the first engagement portion and a position of the third engagement portion may differ in a third direction intersecting the first direction and the second direction, and a position of the second engagement portion and a position of the fourth engagement portion may differ in the third direction.

[0009] In the connecting member disclosed in the present application, the first light source unit may be detachably attached to a first base member in a second direction intersecting the first direction, and the second light source unit may be detachably attached to a second base member in the second direction. In a state in which the connecting member connects the first light source unit and the second light source unit, a position of the first engagement portion and a position of the third engagement portion may differ in the second direction, and a position of the second engagement portion and a position of the fourth engagement portion may differ in the second direction.

[0010] The coupling member disclosed in the present application may include a pair of wall portions and a connection portion. The pair of wall portions may be arranged at a predetermined interval from each other in a direction intersecting the first direction. The connection portion connects the pair of wall portions. The first engagement portion, the second engagement portion, the third engagement portion, and the fourth engagement portion may be formed on each of the wall portions.

[0011] The present application discloses an illumination system including the above-mentioned connecting member, the first light source unit, and the second light source unit, the first light source unit and the second light source unit being connected by the connecting member.

[0012] The lighting system disclosed in the present application may further include a first base member, a second base member, and a cover. The first light source unit may be detachably attached to the first base member in a second direction intersecting the first direction. The second light source unit may be detachably attached to the second base member in the second direction. The cover may be disposed inside the first base member and the second base member, and may cover the connecting member. The connecting member may be movable in the first direction relative to the cover.

[0013] The mounting member disclosed in the present application is attached to an end portion in a first direction of a light source unit having an engaged portion and extending in a first direction. The mounting member includes a first engaging portion and an other engaging portion. The first engaging portion engages with the engaged portion. The other engaging portion engages with another engaged portion of a light source unit different from the light source unit and having a different shape from the engaged portion. The position of the first engaging portion and the position of the other engaging portion differ in a direction intersecting the first direction.

[0014] In the mounting member disclosed in the present application, the light source unit may be detachably mounted to a base member in a second direction intersecting the first direction. When the mounting member is attached to the light source unit, a position of the one engagement portion and a position of the other engagement portion may differ in a third direction intersecting the first direction and the second direction.

[0015] In the mounting member disclosed in the present application, the light source unit may be detachably mounted to a base member in a second direction intersecting the first direction. When the mounting member is attached to the light source unit, a position of the one engagement portion and a position of the other engagement portion may differ in the second direction.

[0016] The mounting member disclosed in the present application may include a pair of wall portions and a connecting portion. The pair of wall portions may be arranged at a predetermined interval from each other in a direction intersecting the first direction. The connecting portion may connect the pair of wall portions. The one engaging portion and the other engaging portion may be formed on each of the wall portions.

[0017] In the mounting member disclosed in the present application, the light source unit may be detachably mounted to a base member in a second direction intersecting the first direction. The mounting member may include end wall portions disposed at ends of the pair of walls and the connection portion in the first direction. The mounting member may close the end of the base member in the first direction.

[0018] The present application discloses a lighting system including the mounting member and the light source unit. The mounting member is attached to the light source unit. Effect of the Invention

[0019] According to the present invention, it is possible to provide a connecting member, an attachment member, and an illumination system that can be used commonly for light source units having different structures. [Brief description of the drawings]

[0020] [Figure 1] 1 is a perspective view showing a schematic structure of a lighting system according to an embodiment of the present invention; [Diagram 2] FIG. 2 is an exploded perspective view showing the first lighting fixture. [Diagram 3] FIG. 4 is an exploded perspective view showing a structure around a connecting member. [Figure 4] 1 is a perspective view showing a connecting member, two engaged members, and a base member in a state in which the connecting member is engaged with the two engaged members. FIG. [Diagram 5] FIG. 4 is a perspective view showing the structure of the connecting member from below. [Figure 6] FIG. 4 is a cross-sectional view showing the structure of a connecting member. [Figure 7] FIG. 7 is a cross-sectional perspective view taken along line VII-VII in FIG. [Figure 8] FIG. 13 is a perspective view showing the structure of a base unit closing member. [Figure 9] 13 is a perspective view showing the structure of the base unit closing member from below. FIG. [Figure 10] 11 is a cross-sectional perspective view showing the structure around the base unit closing member. FIG. [Figure 11] 1 is a perspective view showing a schematic structure of a lighting system according to an embodiment of the present invention; [Figure 12] FIG. 11 is an exploded perspective view showing a third lighting fixture. [Figure 13] FIG. 4 is an exploded perspective view showing a structure around a connecting member. [Figure 14] 1 is a perspective view showing a structure around a connecting member in a state in which the connecting member is engaged with two engaged members. FIG. [Figure 15] FIG. 15 is a cross-sectional perspective view taken along line XV-XV in FIG. [Figure 16] 11 is a cross-sectional perspective view showing the structure around the base unit closing member. FIG. [Figure 17] FIG. 1 is a cross-sectional view showing a structure of a lighting system. [Figure 18] 13 is a diagram showing the light-emitting portion and the base member from below. FIG. [Figure 19] FIG. 1 is a cross-sectional view showing a structure of a lighting system. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. In addition, in the drawings, the same or corresponding parts are given the same reference symbols and the description will not be repeated. In addition, in the drawings, the X-axis, Y-axis, and Z-axis of a three-dimensional orthogonal coordinate system are appropriately described in order to facilitate understanding. The X-axis and Y-axis are parallel to the horizontal direction, and the Z-axis is parallel to the vertical direction. The positive direction of the Z-axis indicates the vertically upward direction, and the negative direction of the Z-axis indicates the vertically downward direction. However, the vertically upward direction and the vertically downward direction are defined for the convenience of explanation, and do not need to coincide with the vertical direction. In addition, the horizontal direction, the vertically upward direction, and the vertically downward direction are merely defined for the convenience of explanation, and do not limit the orientation of the lighting system, the connecting member, and the mounting member according to the present invention when used.

[0022] The connecting member 300 of this embodiment can connect the first light source unit 120 and the second light source unit 220, as described later. Also, the connecting member 300 can connect the third light source unit 1120 and the fourth light source unit 1220, as described later. Furthermore, the base unit closing member 500 of this embodiment can be attached to the first light source unit 120 and can also be attached to the third light source unit 1120, as described later. Also, the base unit closing member 600 of this embodiment can be attached to the second light source unit 220 and can also be attached to the fourth light source unit 1220, as described later. The first light source unit 120 is an example of the "first light source unit" and "light source unit" of the present invention. The second light source unit 220 is an example of the "second light source unit" and "light source unit" of the present invention. The third light source unit 1120 is an example of the "third light source unit" and "other light source unit" of the present invention. The fourth light source unit 1220 is an example of the "fourth light source unit" and "another light source unit" of the present invention. The base unit closing member 500 is an example of the "mounting member" of the present invention. Moreover, the base unit closing member 600 is an example of the "mounting member" of the present invention.

[0023] 1 to 10, a lighting system 1000 including a first light source unit 120, a second light source unit 220, a connecting member 300, a base unit closing member 500, and a base unit closing member 600 will be described. Fig. 1 is a perspective view showing a schematic structure of a lighting system 1000 according to an embodiment of the present invention.

[0024] 1, the lighting system 1000 includes a first lighting fixture 100, a second lighting fixture 200, a light source unit closing member 130, a light source unit closing member 230, a base unit closing member 500, a base unit closing member 600, and a connecting member 300. In this embodiment, the first lighting fixture 100 and the second lighting fixture 200 are indoor lighting fixtures.

[0025] As shown in FIG. 1, the first lighting device 100 emits light. The first lighting device 100 has, for example, a substantially rectangular parallelepiped shape, although it is not particularly limited thereto. The first lighting device 100 extends along a longitudinal direction PD. In this embodiment, the longitudinal direction PD is substantially parallel to the Y axis and indicates the longitudinal direction of the first lighting device 100. The first lighting device 100 has a first base unit 110 and a first light source unit 120. The longitudinal direction PD is an example of the "first direction" in the present invention.

[0026] The first base unit 110 extends along the longitudinal direction PD. The first base unit 110 is directly or indirectly attached to an attachment object. The attachment object is, for example, a mounting portion of a structure such as a building. The mounting portion is, for example, a ceiling surface. The first base unit 110 has a housing 152. The housing 152 is an example of the "first base member" and "base member" of the present invention.

[0027] The first light source unit 120 is detachably attached to the first base unit 110 in a vertical direction (Z direction) intersecting with the longitudinal direction PD (Y direction). The first light source unit 120 extends along the longitudinal direction PD. In this embodiment, the first light source unit 120 emits light. The first light source unit 120 has a cover member 154. The Y direction is an example of a "first direction" in the present invention. The Z direction is an example of a "second direction" in the present invention.

[0028] The second lighting device 200 emits light. The second lighting device 200 has, for example, a substantially rectangular parallelepiped shape, although it is not particularly limited thereto. The second lighting device 200 extends along a longitudinal direction PD. In this embodiment, the longitudinal direction PD indicates the longitudinal direction of the second lighting device 200. The second lighting device 200 is disposed adjacent to the first lighting device 100 in the longitudinal direction PD. The second lighting device 200 has a second base unit 210 and a second light source unit 220.

[0029] The second base unit 210 extends along the longitudinal direction PD. The second base unit 210 is disposed adjacent to the first base unit 110 in the longitudinal direction PD. The second base unit 210 is directly or indirectly attached to an attachment object. The attachment object is, for example, a mounting portion of a structure such as a building. The mounting portion is, for example, a ceiling surface. The second base unit 210 has a housing 252. The housing 252 is an example of the "second base member" and "base member" of the present invention.

[0030] The second light source unit 220 is detachably attached to the second base unit 210 in a vertical direction (Z direction) intersecting with the longitudinal direction PD (Y direction). The second light source unit 220 extends along the longitudinal direction PD. The second light source unit 220 is disposed adjacent to the first light source unit 120 in the longitudinal direction PD. In this embodiment, the second light source unit 220 emits light. The second light source unit 220 has a cover member 254.

[0031] The connecting member 300 connects the adjacent first light source unit 120 and second light source unit 220. Hereinafter, the state in which the connecting member 300 connects the first light source unit 120 and the second light source unit 220 may be referred to as a "connected state." The connecting member 300 will be described later with reference to FIGS. 3 to 7.

[0032] The first lighting fixture 100 will be further described with reference to Fig. 2. Fig. 2 is an exploded perspective view showing the first lighting fixture 100.

[0033] 2, the first light source unit 120 further includes a light emitting section 160, a power supply section 170, a plurality of mounting springs 180, and a board holding member 190, in addition to the cover member 154. The first light source unit 120 further includes a plurality of engaged members 7.

[0034] The cover member 154 extends along the longitudinal direction PD and covers the light-emitting section 160. The inside of the cover member 154 is hollow. The cover member 154 houses the light-emitting section 160 and the substrate holding member 190 therein.

[0035] The cover member 154 is made of a light-transmitting material. For example, synthetic resin or glass can be used as the light-transmitting material. The light-transmitting material may contain a light-diffusing material. Furthermore, the cover member 154 may be subjected to, for example, a minute unevenness forming process for light diffusion. Furthermore, in this embodiment, the cover member 154 is white and semi-transparent. The cover member 154 has, for example, a substantially U-shaped cross section.

[0036] The light emitting unit 160 extends along the longitudinal direction PD and emits light. The light emitting unit 160 is, for example, an LED (Light Emitting Diode) module. Specifically, the light emitting unit 160 includes three boards 164 and a plurality of light emitting elements 166. The three boards 164 are arranged along the longitudinal direction PD. The boards 164 extend along the longitudinal direction PD. The number of boards 164 included in one light source unit may be one, two, or four or more. The boards 164 extend along the longitudinal direction PD. The plurality of light emitting elements 166 are mounted on the mounting surface A1 of the board 164. The plurality of light emitting elements 166 are, for example, arranged in a straight line. Each of the light emitting elements 166 emits light and is, for example, an LED. The plurality of light emitting elements 166 face the inner surface of the cover member 154 and emit light toward the inner surface of the cover member 154. As a result, the light is emitted to the outside of the first lighting device 100 through the cover member 154. It is noted that a single light emitting element 166 may be provided.

[0037] The substrate holding member 190 is substantially elongated and extends along the longitudinal direction PD. The substrate holding member 190 is made of, for example, metal (for example, aluminum). The substrate holding member 190 is formed, for example, by extrusion molding, and the cross-sectional shape of the substrate holding member 190 is constant from one end to the other end in the longitudinal direction PD. The light emitting unit 160 is attached to the substrate holding member 190. Specifically, the substrate holding member 190 has a substantially flat first surface B1 and a second surface B2 facing the first surface B1. The light emitting unit 160 is attached to the substrate holding member 190 so that the first surface B1 faces the facing surface A2 of the substrate 164.

[0038] The multiple mounting springs 180 are attached to the board holding member 190 at intervals. Specifically, the mounting springs 180 are attached to the second surface B2 of the board holding member 190. The first light source unit 120 is attached to the first base unit 110 by the multiple mounting springs 180. For example, each of the mounting springs 180 has elasticity and is made of sheet metal (for example, stainless steel sheet metal). When the multiple mounting springs 180 are fitted into the housing 152, the first light source unit 120 is attached to the first base unit 110 by the elasticity of the multiple mounting springs 180. Note that the dimension of the mounting springs 180 in the X-axis direction may be a dimension that allows the mounting springs 180 to pass through an opening of the first base unit 110 when the first light source unit 120 is attached to the first base unit 110.

[0039] The power supply unit 170 has a terminal block 171 and a power supply 172. The terminal block 171 and the power supply 172 are attached to the second surface B2 of the substrate holding member 190. The power supply 172 is electrically connected to the terminal block 171 via an internal power line (not shown). An AC voltage transmitted through an external power line (not shown) is passed through the internal power line via the terminal block 171. The internal power line transmits the AC voltage to the power supply 172. The power supply 172 generates, from the AC voltage, power that causes the light-emitting element 166 to emit light. The power supply 172 of this embodiment generates, from the AC voltage, a DC voltage that causes the light-emitting element 166 to emit light.

[0040] The light source unit closing member 130 is, for example, an end cap. The pair of light source unit closing members 130 are attached to a pair of ends in the longitudinal direction PD of the first light source unit 120, respectively. More specifically, the pair of light source unit closing members 130 are attached to a pair of ends in the longitudinal direction PD of the cover member 154, respectively. For example, the light source unit closing member 130 is attached to the end in the longitudinal direction PD of the first light source unit 120 by a fixing member. The fixing member is, for example, a screw. The pair of light source unit closing members 130 each close a pair of open ends 4 in the longitudinal direction PD of the first light source unit 120, respectively. More specifically, the pair of light source unit closing members 130 each close a pair of open ends 4 in the longitudinal direction PD of the cover member 154, respectively. The longitudinal direction PD of the cover member 154 is approximately parallel to the Y axis.

[0041] The first base unit 110 has a housing 152. The housing 152 extends along the longitudinal direction PD and has a generally U-shaped cross section. The housing 152 is made of, for example, metal. The first base unit 110 is molded, for example, by extrusion molding, and the cross-sectional shape of the first base unit 110 is constant from one end to the other end in the longitudinal direction PD.

[0042] The base unit closing member 500 is, for example, an end cap. The base unit closing member 500 is fitted to the end of the housing 152 in the -Y direction of the longitudinal direction PD. The base unit closing member 500 closes the open end 5 in the -Y direction of the longitudinal direction PD of the housing 152. The base unit closing member 500 has, for example, a substantially rectangular shape in a plan view. The longitudinal direction PD of the housing 152 is substantially parallel to the Y axis. The open end 5 is an example of the "end of the base member in the first direction" of the present invention.

[0043] In the longitudinal direction PD, the length of the first base unit 110 is shorter than the length of the first light source unit 120. In addition, in the longitudinal direction PD, the length of the second base unit 210 is shorter than the length of the second light source unit 220.

[0044] The engaged member 7 faces the base unit closing member 500 and the connecting member 300. The engaged members 7 are attached to both ends of the substrate holding member 190 in the longitudinal direction PD.

[0045] 1, the light source unit closing member 230 has a similar structure to the light source unit closing member 130. The pair of light source unit closing members 230 are attached to a pair of ends in the longitudinal direction PD of the second light source unit 220, respectively. The base unit closing member 600 has a structure symmetrical to the base unit closing member 500 in the longitudinal direction PD, so a description of the structure of the base unit closing member 600 will be omitted. In addition, the other structures of the second lighting device 200 are similar to those of the first lighting device 100, so a description thereof will be omitted.

[0046] Next, the structure around the connecting member 300 will be further described with reference to Figures 3 and 4. Figure 3 is an exploded perspective view showing the structure around the connecting member 300.

[0047] 3, each of the engaged members 7 has at least one engaged portion 7a. In this embodiment, the engaged member 7 has a pair of engaged portions 7a and a base portion 7b.

[0048] Specifically, the pair of engaged parts 7a are arranged substantially parallel to each other at a predetermined interval in the X direction. The pair of engaged parts 7a are formed on a pair of ends of the base part 7b in the X direction, respectively. In this embodiment, the pair of engaged parts 7a and the base part 7b are formed from a single member. The engaged part 7 is made of, for example, resin. The X direction is an example of the "third direction" in the present invention.

[0049] The base portion 7b has a plate shape. The base portion 7b may be adhered to the substrate holding member 190 by, for example, an adhesive, or may be fixed to the substrate holding member 190 by a fastening member such as a screw. In this embodiment, the base portion 7b is fixed to the substrate holding member 190 by a screw 61. Specifically, a groove 190a extending in the longitudinal direction PD is formed in the second surface portion B2 of the substrate holding member 190, and the base portion 7b is fastened to the groove 190a by the screw 61. The center of the base portion 7b in the X direction substantially coincides with the center of the substrate holding member 190 in the X direction.

[0050] The engaged portion 7a has a predetermined thickness and is shaped like a plate. The engaged portion 7a protrudes from the base portion 7b in the +Z direction.

[0051] In the following description, the engaged member 7 arranged at the end of the first light source unit 120 on the second light source unit 220 side (+Y direction) may be referred to as a first engaged member 71. The engaged portion 7a of the first engaged member 71 may be referred to as a first engaged portion 711. Furthermore, the engaged member 7 arranged at the end of the second light source unit 220 on the first light source unit 120 side (-Y direction) may be referred to as a second engaged member 72. The engaged portion 7a of the second engaged member 72 may be referred to as a second engaged portion 721.

[0052] The connecting member 300 has at least one wall portion 310 extending in the longitudinal direction PD. In this embodiment, the connecting member 300 has a pair of wall portions 310 and a connecting portion 320 that connects the pair of wall portions 310. The connecting member 300 has, for example, a generally U-shaped cross section.

[0053] Specifically, the pair of wall portions 310 are disposed substantially parallel to each other at a predetermined interval in the X direction. The pair of wall portions 310 are connected to a pair of ends of the connection portion 320 in the X direction, respectively. In this embodiment, the pair of wall portions 310 and the connection portion 320 are formed of a single member. The coupling member 300 is made of, for example, resin.

[0054] The connecting portion 320 has a plate shape. The wall portion 310 has a predetermined thickness and has a plate shape. The wall portion 310 protrudes from the connecting portion 320 in the -Z direction.

[0055] Each wall portion 310 has a first engaging portion 311 that engages with a first engaged portion 711 of the first engaged member 71 and a second engaging portion 312 that engages with a second engaged portion 721 of the second engaged member 72 .

[0056] The first engagement portion 311 is formed on a portion of the wall portion 310 on the first light source unit 120 side (-Y direction). The first engagement portion 311 is, for example, a notch formed on an end portion of the wall portion 310 in the -Z direction. The second engagement portion 312 is formed on a portion of the wall portion 310 on the second light source unit 220 side (+Y direction). The second engagement portion 312 is, for example, a notch formed on an end portion of the wall portion 310 in the -Z direction.

[0057] Fig. 4 is a perspective view showing the connecting member 300, the engaged members 7, and the substrate holding member 190 in a state in which the connecting member 300 is engaged with the two engaged members 7. As shown in Fig. 4, the first engaging portion 311 of the connecting member 300 engages with the first engaged portion 711 of the first engaged member 71, and the second engaging portion 312 of the connecting member 300 engages with the second engaged portion 721 of the second engaged member 72, thereby connecting the first light source unit 120 and the second light source unit 220.

[0058] As shown in FIG. 3, the lighting system 1000 further includes a cover 400. The cover 400 is disposed at a boundary between the first base unit 110 and the second base unit 210 adjacent to each other. The cover 400 is disposed so as to cover the connecting member 300. A -Y side portion of the cover 400 is attached to an open end 5 in the +Y direction of the first base unit 110. A +Y side portion of the cover 400 is attached to an open end 5 in the -Y direction of the second base unit 210. A notch 51 is formed in both ends of the first base unit 110 in the Y direction, the notch 51 being cut in the Z axis direction. Also, a notch 51 is formed in both ends of the second base unit 210 in the Y direction, the notch 51 being cut in the Z axis direction.

[0059] The cover 400 is accommodated in the first base unit 110 and the second base unit 210. Specifically, the -Y end of the cover 400 is accommodated in the +Y open end 5 of the first base unit 110. In addition, the +Y end of the cover 400 is accommodated in the -Y open end 5 of the second base unit 210.

[0060] The cover 400 has, for example, a substantially U-shaped cross section, and covers the outside in the X direction and the +Z direction of the connecting member 300. Specifically, the cover 400 has a pair of cover wall portions 410 and a cover connection portion 420 that connects the pair of cover wall portions 410. The pair of cover wall portions 410 and the cover connection portion 420 extend in the longitudinal direction PD. The pair of cover wall portions 410 are disposed substantially parallel to each other at a predetermined interval in the X direction. The pair of cover wall portions 410 are respectively connected to a pair of ends in the X direction of the cover connection portion 420. In this embodiment, the pair of cover wall portions 410 and the cover connection portion 420 are formed of a single member. The cover 400 is made of, for example, resin.

[0061] The cover connecting portion 420 has a plate shape. The cover wall portion 410 has a predetermined thickness and has a plate shape. The cover wall portion 410 protrudes from the cover connecting portion 420 in the -Z direction.

[0062] The pair of cover wall portions 410 cover the outer sides in the X direction of the pair of wall portions 310 of the coupling member 300. The cover connection portion 420 covers the +Z direction of the connection portion 320 of the coupling member 300.

[0063] A linear rib 430 protruding in a direction intersecting the longitudinal direction PD is formed on the pair of cover wall portions 410 and the cover connection portion 420. The rib 430 is sandwiched in the Y direction between the housing 152 of the first base unit 110 and the housing 252 of the second base unit 210. The rib 430 prevents the distance between the housing 152 and the housing 252 from becoming small.

[0064] The pair of cover wall portions 410 have rail grooves 411 extending in the longitudinal direction PD. The rail grooves 411 are slidable along rails (here, first convex portion 152d and second convex portion 152e described later) formed on the inner surface of the housing 152 and the inner surface of the housing 252.

[0065] The cover connection part 420 has a punched part 421 that can be punched. In addition, the cover connection part 420 has a ring-shaped punched groove 422 that surrounds the periphery of the punched part 421. The punched part 421 has, for example, a circular, elliptical or rectangular shape. The punched groove 422 has a smaller thickness than other parts of the cover connection part 420. By removing (punching out) the punched part 421 of the cover connection part 420 along the punched groove 422, a through hole can be provided in the cover connection part 420. Therefore, an external power line (not shown) can be inserted into the first lighting device 100 and the second lighting device 200 through the through hole. As a result, the degree of freedom of the wiring layout can be improved.

[0066] In addition, in a state where the first light source unit 120 and the second light source unit 220 are connected by the connecting member 300, a gap is formed between the light source unit closing member 130 attached to the end of the first light source unit 120 in the +Y direction and the light source unit closing member 230 attached to the end of the second light source unit 220 in the -Y direction. The size of this gap is, for example, 1 mm. By providing a gap between the light source unit closing member 130 and the light source unit closing member 230 by the connecting member 300, even when the first light source unit 120 and the second light source unit 220 thermally expand and / or thermally contract, it is possible to suppress contact between the light source unit closing member 130 and the light source unit closing member 230. Therefore, it is possible to suppress the generation of abnormal noise caused by contact between the light source unit closing member 130 and the light source unit closing member 230.

[0067] Next, the connecting member 300 will be further described with reference to Fig. 3 to Fig. 7. Fig. 5 is a perspective view showing the structure of the connecting member 300 from below. Fig. 6 is a cross-sectional view showing the structure of the connecting member 300. Fig. 7 is a cross-sectional perspective view taken along line VII-VII in Fig. 4.

[0068] 5 and 6, first engaging portion 311 has opposing surface 311a, opposing surface 311b, inclined surface 311c, and inclined surface 311d. Opposing surface 311a, opposing surface 311b, inclined surface 311c, and inclined surface 311d are formed to correspond to the surface shape of first engaged portion 711.

[0069] Specifically, the facing surface 311a is disposed closer to the second light source unit 220 (in the +Y direction) than the facing surface 311b. The facing surfaces 311a and 311b face each other in the longitudinal direction PD. The facing surfaces 311a and 311b are formed substantially perpendicular to the longitudinal direction PD. The inclined surface 311c is connected to an end of the facing surface 311a in the +Z direction. The inclined surface 311d is connected to an end of the facing surface 311b in the +Z direction. The inclined surfaces 311c and 311d are inclined so that the distance between them decreases toward the +Z direction. The end of the inclined surface 311c in the +Z direction is connected to the end of the inclined surface 311d in the +Z direction. The inclined surface 311d has a larger inclination angle with respect to the longitudinal direction PD than the inclined surface 311c.

[0070] Similar to the first engagement portion 311, the second engagement portion 312 has opposing surfaces 311a, 311b, inclined surfaces 311c, and inclined surfaces 311d. Note that the second engagement portion 312 has a structure symmetrical to that of the first engagement portion 311 in the longitudinal direction PD, and therefore a description of the structure of the second engagement portion 312 will be omitted.

[0071] As shown in FIG. 4 and FIG. 7, the first engaged portion 711 has an opposing surface 71a, an opposing surface 71b, an inclined surface 71c, and an inclined surface 71d. The opposing surface 71a is disposed closer to the second light source unit 220 (in the +Y direction) than the opposing surface 71b. The opposing surface 71a faces the opposing surface 311a of the first engaging portion 311. The opposing surface 71b faces the opposing surface 311b of the first engaging portion 311. The opposing surfaces 71a and 71b are formed substantially perpendicular to the longitudinal direction PD. The inclined surface 71c is connected to an end of the opposing surface 71a in the +Z direction. The inclined surface 71d is connected to an end of the opposing surface 71b in the +Z direction. The inclined surfaces 71c and 71c are inclined so that the distance between them becomes smaller toward the +Z direction. The end of the inclined surface 71c in the +Z direction is connected to the end of the inclined surface 71d in the +Z direction. Moreover, the inclined surface 71d has a larger inclination angle with respect to the longitudinal direction PD than the inclined surface 71c.

[0072] The second engaged portion 721 has an opposing surface 71a, an opposing surface 71b, an inclined surface 71c, and an inclined surface 71d, similar to the first engaged portion 711. Note that the second engaged portion 721 has a structure symmetrical to that of the first engaged portion 711 in the longitudinal direction PD, and therefore a description of the structure of the second engaged portion 721 will be omitted.

[0073] The first engaged portion 711 is fitted into the first engaging portion 311 from below (-Z direction) toward above (+Z direction). The first engaged portion 711 tapers toward the top (+Z direction). On the other hand, the first engaging portion 311 widens toward the bottom (-Z direction). Therefore, when the first engaged portion 711 is inserted into the first engaging portion 311, the first engaged portion 711 can be prevented from being caught on the inner surface of the first engaging portion 311. As described above, the second engaged portion 721 is configured similarly to the first engaged portion 711, and the second engaging portion 312 is configured similarly to the first engaging portion 311. Therefore, when the second engaged portion 721 is inserted into the second engaging portion 312, the outer surface of the second engaged portion 721 can be prevented from being caught on the inner surface of the second engaging portion 312.

[0074] 5 to 7, in this embodiment, the connecting member 300 further includes a third engaging portion 331 that engages with a third engaged portion 1711 of the third light source unit 1120 described later, and a fourth engaging portion 332 that engages with a fourth engaged portion 1721 of the fourth light source unit 1220 described later. The third engaging portion 331 and the fourth engaging portion 332 will be described later.

[0075] Next, the connecting member 300 will be described in more detail. In this embodiment, as shown in FIG. 4 and FIG. 6, the opposing surfaces 71a and 71b of the first engaged portion 711 are formed in parallel. On the other hand, the opposing surfaces 311a and 311b of the first engaging portion 311 are formed to approach each other slightly toward the -Z direction. Specifically, the opposing surface 311a of the first engaging portion 311 is inclined at about 1 degree with respect to the Z direction so as to approach the opposing surface 311b toward the -Z direction. Also, the opposing surface 311b of the first engaging portion 311 is inclined at about 1 degree with respect to the Z direction so as to approach the opposing surface 311a toward the -Z direction. Therefore, the lower end of the opposing surface 311a of the first engaging portion 311 and the lower end of the opposing surface 311b of the first engaging portion 311 sandwich the first engaged portion 711 in the longitudinal direction PD. As described above, the second engaged portion 721 is configured similarly to the first engaged portion 711, and the second engaging portion 312 is configured similarly to the first engaging portion 311. Therefore, the lower end of the second engaging portion 312 clamps the second engaged portion 721 in the longitudinal direction PD. Therefore, for example, when the first light source unit 120 and the second light source unit 220 are attached to the first base unit 110 and the second base unit 210, respectively, the connecting member 300 can be prevented from coming off the first light source unit 120 and the second light source unit 220. Therefore, the workability of attaching the first lighting device 100 and the second lighting device 200 can be improved.

[0076] In this embodiment, the connecting member 300 has a recess 301 and a hole 302 formed across the wall portion 310 and the connecting portion 320. Specifically, as shown in FIG. 4 and FIG. 5, the wall portion 310 has an outer surface 310a and an inner surface 310b. The connecting portion 320 has an upper surface 320a which is an outer surface and a lower surface 320b which is an inner surface. The recess 301 and the hole 302 are formed across the outer surface 310a of the wall portion 310 and the upper surface 320a of the connecting portion 320. The recess 301 is formed in a portion of the wall portion 310 on the -Y direction side and a portion of the wall portion 310 on the +Y direction side. The hole 302 penetrates the wall portion 310 and the connecting portion 320 in the thickness direction. In addition, the hole 302 is formed in the center of the longitudinal direction PD of the connecting member 300. That is, the hole 302 is formed between two recesses 301 in the longitudinal direction PD.

[0077] In this embodiment, the connecting member 300 has a rib 303 protruding upward from the upper surface 320a. In this embodiment, the rib 303 extends in the longitudinal direction PD. The rib 303 is formed along the recess 301 and the hole 302. The rib 303 is formed on a portion of the upper surface 320a of the connecting portion 320 on the +X direction side and on the -X direction side. By providing the rib 303 on the connecting member 300, it is possible to prevent the edge of the recess 301 or the hole 302 from coming into contact with and getting caught on the cover 400 when the connecting member 300 moves (slides) in the longitudinal direction PD relative to the cover 400. Therefore, it is possible to prevent the connecting member 300 from becoming difficult to move (slide) in the longitudinal direction PD relative to the cover 400. The connecting member 300 is movable in the longitudinal direction PD relative to the cover 400. This can prevent the connecting member 300 from getting caught on the cover 400 when the first light source unit 120 and the second light source unit 220 thermally expand and / or contract.

[0078] The connection part 320 has a through hole 321 formed therein, which penetrates the connection part 320 in the thickness direction (Z direction). The through hole 321 has, for example, a circular, oval or rectangular shape. The through hole 321 is disposed at a position below (in the -Z direction) the punched part 421 (see FIG. 3) of the cover 400. By providing the through hole 321 in the connection part 320, an external power line (not shown) can be easily inserted into the first lighting device 100 and the second lighting device 200 through the through hole 321. As a result, the degree of freedom of the layout of the wiring can be easily improved. Note that the connection part 320 may have a punched part that can be punched and a punched groove surrounding the periphery of the punched part, similar to the cover connection part 420 of the cover 400. Then, the through hole may be provided in the connection part 320 by removing (punching) the punched part of the connection part 320 along the punched groove, as necessary.

[0079] As shown in FIG. 5 and FIG. 7, a protrusion 310c protruding inward in the X direction is formed on the lower part of the inner surface 310b of the wall part 310. The protrusion 310c protrudes from the inner surface 310b of the wall part 310 toward the opposing wall part 310. The protrusion 310c is formed on each wall part 310. The distance between the protrusions 310c in the X direction is shorter than the distance between other parts of the lower part of the inner surface 310b of the wall part 310 in the X direction. The pair of protrusions 310c sandwich at least one of the first engaged member 71 and the second engaged member 72 and the light source unit blocking members 130, 230 in the X direction. Therefore, it is possible to suppress the position of the first light source unit 120 in the X direction relative to the connecting member 300 and the position of the second light source unit 220 in the X direction relative to the connecting member 300 from being misaligned. In other words, it is possible to suppress misalignment in the X direction between the first light source unit 120 and the second light source unit 220. In this embodiment, the pair of protrusions 310c sandwich the light source unit closing member 130 and the light source unit closing member 230 in the X direction.

[0080] Next, the structure around the base unit closing member 500 will be further described with reference to Fig. 8 to Fig. 10. Fig. 8 is a perspective view showing the structure of the base unit closing member 500. Fig. 9 is a perspective view showing the structure of the base unit closing member 500 from below. Fig. 10 is a cross-sectional perspective view showing the structure around the base unit closing member 500.

[0081] 8 and 9, the base unit blocking member 500 has at least one wall portion 510 extending in the longitudinal direction PD. In this embodiment, the base unit blocking member 500 has a pair of walls 510, a connection portion 520 connecting the pair of walls 510, and a lid portion 530. The base unit blocking member 500 has, for example, a generally U-shaped cross section. The lid portion 530 is an example of the "end wall portion" of the present invention.

[0082] Specifically, the pair of walls 510 are disposed substantially parallel to each other at a predetermined interval in the X direction. The pair of walls 510 are connected to a pair of ends of the connection portion 520 in the X direction, respectively. The lid portion 530 connects the ends of the pair of walls 510 in the -Y direction and the end of the connection portion 520 in the -Y direction. In this embodiment, the pair of walls 510, the connection portion 520, and the lid portion 530 are formed of a single member. The base unit closing member 500 is made of, for example, resin.

[0083] The connection portion 520 has a plate shape. The wall portion 510 has a predetermined thickness and has a plate shape. The wall portion 510 protrudes in the -Z direction from the connection portion 520. The lid portion 530 has a predetermined thickness and has a plate shape.

[0084] Each wall portion 510 engages with an engaged portion 7a (see FIG. 10) of an engaged member 7 arranged at the end of the first light source unit 120 on the opposite side (-Y direction) from the second light source unit 220. Hereinafter, the engaged member 7 arranged at the end of the first light source unit 120 on the opposite side (-Y direction) from the second light source unit 220 may be referred to as an engaged member 73. Each wall portion 510 has an engaging portion 511 that engages with the engaged portion 7a of the engaged member 73. The engaging portion 511 is an example of the "one-side engaging portion" in the present invention.

[0085] The engagement portion 511 is formed on a portion of the wall portion 510 on the opposite side (−Y direction) to the second light source unit 220. The engagement portion 511 is a recess formed on the inner surface of the wall portion 510, for example.

[0086] The engaging portion 511 of the base unit closing member 500 engages with the engaged portion 7a of the engaged member 73, so that the base unit closing member 500 can move in the Y direction together with the first light source unit 120 relative to the first base unit 110. The wall portion 510 has a rail groove 510a extending in the longitudinal direction PD. The rail groove 510a is slidable along a rail (here, a first protrusion 152d described later) formed on the inner surface of the housing 152.

[0087] 2, the base unit closing member 500 is attached to the -Y direction open end 5 of the first base unit 110. The base unit closing member 500 is housed in the first base unit 110. Specifically, the +Y direction end of the base unit closing member 500 is housed in the -Y direction open end 5 of the first base unit 110.

[0088] 9, the engaging portion 511 has an opposing surface 511a, an opposing surface 511b, an inclined surface 511c, an inclined surface 511d, and a connecting surface 511e. The opposing surface 511a, the opposing surface 511b, the inclined surface 511c, and the inclined surface 511d are formed to correspond to the surface shape of the engaged portion 7a.

[0089] Specifically, the facing surface 511a is disposed on the opposite side (-Y direction) to the second light source unit 220 compared to the facing surface 511b. The facing surfaces 511a and 511b face each other in the longitudinal direction PD. The facing surfaces 511a and 511b are formed substantially perpendicular to the longitudinal direction PD. The inclined surface 511c is connected to an end of the facing surface 511a in the +Z direction. The inclined surface 511d is connected to an end of the facing surface 511b in the +Z direction. The inclined surfaces 511c and 511d are inclined so that the distance between them decreases toward the +Z direction. The end of the inclined surface 511c in the +Z direction is connected to the end of the inclined surface 511d in the +Z direction. Moreover, the inclined surface 511d has a larger inclination angle with respect to the longitudinal direction PD compared to the inclined surface 511c. The connection surface 511e connects the outer ends in the X direction of the opposing surface 511a, the opposing surface 511b, the inclined surface 511c, and the inclined surface 511d.

[0090] As shown in FIG. 10, like the first engaged portion 711 and the second engaged portion 721, the engaged portion 7a has an opposing surface 71a, an opposing surface 71b, an inclined surface 71c and an inclined surface 71d.

[0091] The engaged portion 7a of the engaged member 73 is fitted into the engaging portion 511 from below (-Z direction) toward above (+Z direction). The engaged portion 7a tapers toward the top (+Z direction). Meanwhile, the engaging portion 511 widens toward the bottom (-Z direction). This makes it possible to prevent the engaged portion 7a from getting caught on the inner surface of the engaging portion 511 when it is inserted into the engaging portion 511.

[0092] Furthermore, the connection surface 511e of the engaging portion 511 restricts the outward movement of the engaged portion 7a in the X direction.

[0093] In this embodiment, as shown in Fig. 9, the base unit closing member 500 further has an engaging portion 531 that engages with an engaged portion 1007a of an engaged member 1007 of a third light source unit 1120 described later. The engaged portion 1007a is an example of the "other engaged portion" of the present invention. The engaging portion 531 is an example of the "other engaging portion" of the present invention. The engaging portion 531 will be described later.

[0094] In this embodiment, the opposing surfaces 71a and 71b of the engaged portion 7a are formed in parallel. On the other hand, the opposing surfaces 511a and 511b of the engaging portion 511 are formed to approach each other slightly toward the -Z direction. Specifically, the opposing surface 511a of the engaging portion 511 is inclined at about 1 degree with respect to the Z direction so as to approach the opposing surface 511b toward the -Z direction. Also, the opposing surface 511b of the engaging portion 511 is inclined at about 1 degree with respect to the Z direction so as to approach the opposing surface 511a toward the -Z direction. Therefore, the lower end of the opposing surface 511a of the engaging portion 511 and the lower end of the opposing surface 311b sandwich the engaged portion 7a in the longitudinal direction PD. Therefore, for example, when the first light source unit 120 and the second light source unit 220 are attached to the first base unit 110 and the second base unit 210, respectively, it is possible to prevent the base unit closing member 500 from coming off the first light source unit 120. This makes it possible to improve the ease of attachment of the first lighting device 100 and the second lighting device 200.

[0095] As shown in FIG. 8, the connection portion 520 is formed with a through hole 521 and a notch 522 penetrating the connection portion 520 in the thickness direction (Z direction). The through hole 521 and the notch 522 have, for example, a circular shape, an elliptical shape, a rectangular shape, or a shape obtained by dividing an ellipse into half. The through hole 521 is disposed below (in the -Z direction) the notch 51 of the first base unit 110. By providing the through hole 521 and / or the notch 522 in the connection portion 520, an external power line (not shown) can be easily inserted into the inside of the first lighting device 100 through the through hole 521 and / or the notch 522. As a result, the degree of freedom in the layout of the wiring can be improved more easily. Note that the connection portion 520 may be formed with a punched portion that can be punched and a punched groove that surrounds the periphery of the punched portion, similar to the cover connection portion 420 of the cover 400. Then, as necessary, the punched portion of the connection portion 520 may be removed (punched out) along the punched groove to provide a through hole and / or a notch in the connection portion 520.

[0096] The engaged member 7 disposed at the end of the second light source unit 220 on the opposite side (+Y direction) from the first light source unit 120 has a structure symmetrical to the engaged member 73 in the longitudinal direction PD. The base unit closing member 600 has a structure symmetrical to the base unit closing member 500 in the longitudinal direction PD. Therefore, the base unit closing member 600 has the same function as the base unit closing member 500.

[0097] 11 to 16, a lighting system 2000 including a third light source unit 1120, a fourth light source unit 1220, a connecting member 300, a base unit closing member 500, and a base unit closing member 600 will be described. Fig. 11 is a perspective view showing a schematic structure of a lighting system 2000 according to an embodiment of the present invention.

[0098] 11, the lighting system 2000 includes a third lighting fixture 1100, a fourth lighting fixture 1200, a light source unit closing member 1130, a light source unit closing member 1230, a base unit closing member 500, a base unit closing member 600, and a connecting member 300. In this embodiment, the third lighting fixture 1100 and the fourth lighting fixture 1200 are lighting fixtures for outdoor use.

[0099] As shown in Fig. 11, the third lighting device 1100 emits light. The third lighting device 1100 has, for example, a substantially rectangular parallelepiped shape, although it is not particularly limited thereto. The third lighting device 1100 extends along a longitudinal direction PD. In this embodiment, the longitudinal direction PD is substantially parallel to the Y axis and indicates the longitudinal direction of the third lighting device 1100. The third lighting device 1100 has a third base unit 1110 and a third light source unit 1120.

[0100] The third base unit 1110 extends along the longitudinal direction PD. The third base unit 1110 is directly or indirectly attached to an attachment object. The attachment object is, for example, a mounting portion of a structure such as a building. The mounting portion is, for example, a ceiling surface. The third base unit 1110 has a housing 1152. The housing 1152 is an example of the "base member" of the present invention. The housing 1152 may have the same structure as the housing 152 of the lighting system 1000.

[0101] The third light source unit 1120 is detachably attached to the third base unit 1110 in a vertical direction (Z direction) intersecting with the longitudinal direction PD (Y direction). The third light source unit 1120 extends along the longitudinal direction PD. In this embodiment, the third light source unit 1120 emits light. The third light source unit 1120 has a cover member 1154.

[0102] The fourth lighting device 1200 emits light. The fourth lighting device 1200 has, for example, a substantially rectangular parallelepiped shape, although it is not particularly limited thereto. The fourth lighting device 1200 extends along a longitudinal direction PD. In this embodiment, the longitudinal direction PD indicates the longitudinal direction of the fourth lighting device 1200. The fourth lighting device 1200 is disposed adjacent to the third lighting device 1100 in the longitudinal direction PD. The fourth lighting device 1200 has a fourth base unit 1210 and a fourth light source unit 1220.

[0103] The fourth base unit 1210 extends along the longitudinal direction PD. The fourth base unit 1210 is disposed adjacent to the third base unit 1110 in the longitudinal direction PD. The fourth base unit 1210 is directly or indirectly attached to an attachment object. The attachment object is, for example, a mounting portion of a structure such as a building. The mounting portion is, for example, a ceiling surface. The fourth base unit 1210 has a housing 1252. The housing 1252 is an example of the "base member" of the present invention. The housing 1252 may have the same structure as the housing 252 of the lighting system 1000.

[0104] The fourth light source unit 1220 is detachably attached to the fourth base unit 1210 in a vertical direction (Z direction) intersecting with the longitudinal direction PD (Y direction). The fourth light source unit 1220 extends along the longitudinal direction PD. The fourth light source unit 1220 is disposed adjacent to the third light source unit 1120 in the longitudinal direction PD. In this embodiment, the fourth light source unit 1220 emits light. The fourth light source unit 1220 has a cover member 1254.

[0105] The connecting member 300 connects the adjacent third light source unit 1120 and fourth light source unit 1220. Hereinafter, the state in which the connecting member 300 connects the third light source unit 1120 and the fourth light source unit 1220 may be referred to as a "connected state."

[0106] The third lighting fixture 1100 will be further described with reference to Figure 12. Figure 12 is an exploded perspective view showing the third lighting fixture 1100.

[0107] 12, the third light source unit 1120 further includes a light emitting unit 160, a power supply unit 1170, a plurality of mounting springs 1180, and a board holding member 1190 in addition to the cover member 1154. The third light source unit 1120 further includes a plurality of engaged members 1007.

[0108] The cover member 1154 extends along the longitudinal direction PD and covers the light-emitting unit 160. The inside of the cover member 1154 is hollow. The cover member 1154 houses the light-emitting unit 160, the substrate holding member 1190, and the power supply unit 1170. Thus, unlike the cover member 154 of the lighting system 1000, the cover member 1154 houses the power supply unit 1170.

[0109] The cover member 1154 is made of a light-transmitting material. For example, synthetic resin or glass can be used as the light-transmitting material. The light-transmitting material may contain a light-diffusing material. Furthermore, the cover member 1154 may be subjected to, for example, a minute unevenness forming process for light diffusion. Furthermore, in this embodiment, the cover member 1154 is white and semi-transparent. The cover member 1154 has, for example, a ring shape in cross section.

[0110] Light-emitting unit 160 has the same configuration as light-emitting unit 160 of lighting system 1000, and therefore a description thereof will be omitted. A plurality of light-emitting elements 166 of light-emitting unit 160 face the inner surface of cover member 1154 and emit light toward the inner surface of cover member 1154. As a result, the light is emitted to the outside of third lighting device 1100 through cover member 1154.

[0111] The substrate holding member 1190 is substantially elongated and extends along the longitudinal direction PD. The substrate holding member 1190 is made of, for example, metal (for example, aluminum). The substrate holding member 1190 is formed, for example, by extrusion molding, and the cross-sectional shape of the substrate holding member 1190 is constant from one end to the other end in the longitudinal direction PD. The light emitting unit 160 is attached to the substrate holding member 1190. Specifically, the substrate holding member 1190 has a substantially flat first surface portion B11 and a second surface portion B12 facing the first surface portion B11. The light emitting unit 160 is attached to the substrate holding member 1190 so that the first surface portion B11 faces the facing surface A2 of the substrate 164.

[0112] The multiple mounting springs 1180 are attached to the board holding member 1190 at intervals. Specifically, the mounting springs 1180 are attached to the second surface B12 of the board holding member 1190. The third light source unit 1120 is attached to the third base unit 1110 by the multiple mounting springs 1180. For example, each of the mounting springs 1180 has elasticity and is made of sheet metal (for example, stainless steel sheet metal). When the multiple mounting springs 1180 are fitted into the housing 1152, the third light source unit 1120 is attached to the third base unit 1110 by the elasticity of the multiple mounting springs 1180. Note that the dimension of the mounting springs 1180 in the X-axis direction may be a dimension that allows the mounting springs 1180 to pass through an opening of the third base unit 1110 when the third light source unit 1120 is attached to the third base unit 1110.

[0113] The power supply unit 1170 has a connector 1171 and a power supply 1172. The connector 1171 is attached to the upper part (the part in the +Z direction) of the cover member 1154. The power supply 1172 is attached to the second surface part B12 of the substrate holding member 1190. The power supply 1172 is electrically connected to the connector 1171 via an internal power line (not shown). An AC voltage transmitted through an external power line (not shown) is applied to the internal power line via the connector 1171. The internal power line transmits the AC voltage to the power supply 1172. The power supply 1172 generates power from the AC voltage to cause the light emitting element 166 to emit light. The power supply 1172 of this embodiment generates a DC voltage from the AC voltage to cause the light emitting element 166 to emit light.

[0114] The light source unit closing member 1130 is, for example, an end cap. The pair of light source unit closing members 1130 each have, for example, a substantially flat plate shape. The pair of light source unit closing members 1130 are attached to a pair of ends in the longitudinal direction PD of the third light source unit 1120, respectively. More specifically, the pair of light source unit closing members 1130 are attached to a pair of ends in the longitudinal direction PD of the cover member 1154, respectively. For example, the light source unit closing member 1130 is attached to the end in the longitudinal direction PD of the third light source unit 1120 by a fixing member. The fixing member is, for example, a screw or an adhesive. The pair of light source unit closing members 1130 each close a pair of open ends 1004 in the longitudinal direction PD of the third light source unit 1120, respectively. More specifically, the pair of light source unit closing members 1130 each close a pair of open ends 1004 in the longitudinal direction PD of the cover member 1154, respectively. The longitudinal direction PD of the cover member 1154 is approximately parallel to the Y axis.

[0115] The third base unit 1110 has a housing 1152. The housing 1152 extends along the longitudinal direction PD and has a generally U-shaped cross section. The housing 1152 is made of, for example, metal. The third base unit 1110 is molded, for example, by extrusion molding, and the cross-sectional shape of the third base unit 1110 is constant from one end to the other end in the longitudinal direction PD.

[0116] The base unit closing member 500 is, for example, an end cap. The base unit closing member 500 is fitted to an end portion in the -Y direction of the longitudinal direction PD of the housing 1152. The base unit closing member 500 closes an open end 1005 in the -Y direction of the longitudinal direction PD of the housing 1152. The base unit closing member 500 has, for example, a substantially rectangular shape in a plan view. The longitudinal direction PD of the housing 1152 is substantially parallel to the Y axis.

[0117] In the longitudinal direction PD, the length of the third base unit 1110 is shorter than the length of the third light source unit 1120. In addition, in the longitudinal direction PD, the length of the fourth base unit 1210 is shorter than the length of the fourth light source unit 1220.

[0118] The engaged member 1007 faces the base unit closing member 500 and the connecting member 300. The engaged members 1007 are attached to both ends of the substrate holding member 1190 in the longitudinal direction PD.

[0119] The light source unit closing member 1230 has a similar structure to the light source unit closing member 1130. The pair of light source unit closing members 1230 are respectively attached to a pair of ends in the longitudinal direction PD of the fourth light source unit 1220. The fourth lighting device 1200 has a similar configuration to the third lighting device 1100, and therefore a description thereof will be omitted.

[0120] Next, the structure around the connecting member 300 will be further described with reference to Figures 13 and 14. Figure 13 is an exploded perspective view showing the structure around the connecting member 300.

[0121] 13, each of the engaged members 1007 has at least one engaged portion 1007a. In this embodiment, the engaged member 1007 has a pair of engaged portions 1007a and a base portion 1007b.

[0122] Specifically, the pair of engaged portions 1007a are disposed substantially parallel to each other at a predetermined interval in the X direction. The pair of engaged portions 1007a are formed at a pair of ends of the base portion 1007b in the X direction, respectively. In this embodiment, the pair of engaged portions 1007a and the base portion 1007b are formed from a single member. The engaged member 1007 is made of, for example, metal. In this embodiment, the engaged member 1007 is made of sheet metal (for example, stainless steel sheet metal).

[0123] The base portion 1007b has a plate shape. The base portion 1007b has a shape different from that of the base portion 7b of the engaged member 7 of the lighting system 1000. The base portion 1007b may be adhered to the substrate holding member 1190 by, for example, an adhesive, or may be fixed to the substrate holding member 1190 by a fastening member such as a screw. In this embodiment, the base portion 1007b is fixed to the substrate holding member 1190 by a screw 1061.

[0124] 12, the third light source unit 1120 further includes a water-stopping member 1021 and a fixing member 1022. The fixing member 1022, the cover member 1154, the water-stopping member 1021, and the engaged member 1007 are stacked in this order. The fixing member 1022 is disposed inside the cover member 1154, and the water-stopping member 1021 and the engaged member 1007 are disposed on the upper side (+Z direction) of the cover member 1154.

[0125] The fixing member 1022 is a member for fixing the engaged member 1007 and the water blocking member 1021 to the upper surface of the cover member 1154. The fixing member 1022 is made of, for example, sheet metal (for example, stainless steel sheet metal).

[0126] The water-stopping member 1021 is disposed in a through-hole on the upper surface of the cover member 1154. For example, the water-stopping member 1021 is a rubber packing, gasket, or the like. The water-stopping member 1021 has a through-hole. An external power line (not shown) connected to an external AC power source is inserted into the through-hole of the water-stopping member 1021.

[0127] The base portion 1007b is formed with a through hole 1017. A part of a water blocking member 1021 is inserted into the through hole 1017.

[0128] The engaged member 1007 and the waterproofing member 1021 are fixed to the cover member 1154 by using a screw 1061 (see FIG. 13) and a fixing member 1022.

[0129] 13, the engaged portion 1007a has a predetermined thickness and a plate shape. The engaged portion 1007a has a shape different from that of the engaged portion 7a of the engaged member 7 of the lighting system 1000. The engaged portion 1007a protrudes in the +Z direction from the base portion 1007b.

[0130] In the following description, the engaged member 1007 disposed at the end of the third light source unit 1120 on the fourth light source unit 1220 side (+Y direction) may be referred to as a third engaged member 1071. The engaged portion 1007a of the third engaged member 1071 may be referred to as a third engaged portion 1711. In addition, the engaged member 1007 disposed at the end of the fourth light source unit 1220 on the third light source unit 1120 side (-Y direction) may be referred to as a fourth engaged member 1072. The engaged portion 1007a of the fourth engaged member 1072 may be referred to as a fourth engaged portion 1721.

[0131] 5 and 6, each wall portion 310 of the connecting member 300 has a third engaging portion 331 that engages with a third engaged portion 1711 (see FIG. 13) of the third engaged member 1071, and a fourth engaging portion 332 that engages with a fourth engaged portion 1721 (see FIG. 13) of the fourth engaged member 1072. The third engaging portion 331 engages with the third engaged portion 1711 having a different shape from the first engaged portion 711 of the lighting system 1000. The fourth engaging portion 332 engages with the fourth engaged portion 1721 having a different shape from the second engaged portion 721 of the lighting system 1000.

[0132] The third engagement portion 331 is formed on a portion of the wall portion 310 on the third light source unit 1120 side (-Y direction). The third engagement portion 331 has a shape different from that of the first engagement portion 311 of the lighting system 1000. In this embodiment, the third engagement portion 331 is a recess formed on the inner surface of the wall portion 310. The fourth engagement portion 332 is formed on a portion of the wall portion 310 on the fourth light source unit 1220 side (+Y direction). The fourth engagement portion 332 has a shape different from that of the second engagement portion 312 of the lighting system 1000. In this embodiment, the fourth engagement portion 332 is a recess formed on the inner surface of the wall portion 310.

[0133] Fig. 14 is a perspective view showing the structure around the connecting member 300 in a state in which the connecting member 300 is engaged with two engaged members 1007. Fig. 15 is a perspective view of a cross section taken along line XV-XV in Fig. 14. As shown in Figs. 14 and 15, the third engaging portion 331 of the connecting member 300 engages with the third engaged portion 1711 of the third engaged member 1071, and the fourth engaging portion 332 of the connecting member 300 engages with the fourth engaged portion 1721 of the fourth engaged member 1072, thereby connecting the third light source unit 1120 and the fourth light source unit 1220.

[0134] 13, the lighting system 2000 includes a cover 400, similar to the lighting system 1000. The cover 400 of the lighting system 2000 has the same configuration as the cover 400 of the lighting system 1000, and therefore a description thereof will be omitted.

[0135] 14, in a state in which the third light source unit 1120 and the fourth light source unit 1220 are connected by the connecting member 300, a gap is formed between the light source unit closing member 1130 attached to the end of the third light source unit 1120 in the +Y direction and the light source unit closing member 1230 attached to the end of the fourth light source unit 1220 in the -Y direction. The size of this gap is, for example, 1 mm. By providing a gap between the light source unit closing member 1130 and the light source unit closing member 1230 by the connecting member 300, it is possible to prevent the light source unit closing member 1130 and the light source unit closing member 1230 from contacting each other even when the third light source unit 1120 and the fourth light source unit 1220 thermally expand and / or thermally contract. Therefore, it is possible to prevent abnormal noise caused by contact between the light source unit closing member 1130 and the light source unit closing member 1230.

[0136] Next, the coupling member 300 will be further described with reference to FIGS.

[0137] 5 and 6, the position of the first engagement portion 311 on the wall portion 310 and the position of the third engagement portion 331 on the wall portion 310 differ in a direction intersecting with the longitudinal direction PD. In this embodiment, the position of the first engagement portion 311 on the wall portion 310 and the position of the third engagement portion 331 on the wall portion 310 differ in an X direction intersecting with the longitudinal direction PD (Y direction) and the Z direction. In addition, the position of the first engagement portion 311 on the wall portion 310 and the position of the third engagement portion 331 on the wall portion 310 differ in the Z direction.

[0138] Specifically, in this embodiment, in the wall portion 310, the first engagement portion 311 is disposed on the outer side in the X direction with respect to the third engagement portion 331. Also, in the wall portion 310, the first engagement portion 311 is disposed on the -Z direction with respect to the third engagement portion 331.

[0139] Similarly, the position of the second engagement portion 312 on the wall portion 310 and the position of the fourth engagement portion 332 on the wall portion 310 differ in a direction intersecting the longitudinal direction PD. In this embodiment, the position of the second engagement portion 312 on the wall portion 310 and the position of the fourth engagement portion 332 on the wall portion 310 differ in an X direction intersecting the longitudinal direction PD (Y direction) and the Z direction. Also, the position of the second engagement portion 312 on the wall portion 310 and the position of the fourth engagement portion 332 on the wall portion 310 differ in the Z direction.

[0140] Specifically, in this embodiment, in the wall portion 310, the second engagement portion 312 is disposed outward in the X direction with respect to the fourth engagement portion 332. Also, in the wall portion 310, the second engagement portion 312 is disposed in the -Z direction with respect to the fourth engagement portion 332.

[0141] On the other hand, the position of the first engagement portion 311 on the wall portion 310 and the position of the third engagement portion 331 on the wall portion 310 overlap in the longitudinal direction PD. In this embodiment, the position of the first engagement portion 311 on the wall portion 310 and the position of the third engagement portion 331 on the wall portion 310 are substantially the same position in the longitudinal direction PD. In this manner, since the position of the first engagement portion 311 on the wall portion 310 and the position of the third engagement portion 331 on the wall portion 310 overlap in the longitudinal direction PD, it is possible to prevent the length of the connecting member 300 from becoming longer in the longitudinal direction PD.

[0142] 6, the third engaging portion 331 has an opposing surface 331a, an opposing surface 331b, and a connecting surface 331c. The opposing surface 331a and the opposing surface 331b are formed to correspond to the surface shape of the third engaged portion 1711.

[0143] Specifically, the facing surface 331a is disposed closer to the fourth light source unit 1220 (+Y direction) than the facing surface 331b. The facing surfaces 331a and 331b face each other in the longitudinal direction PD. The facing surfaces 331a and 331b are formed substantially perpendicular to the longitudinal direction PD. The connection surface 331c connects the outer ends of the facing surfaces 331a and 331b in the X direction to each other.

[0144] The fourth engagement portion 332 has an opposing surface 331a, an opposing surface 331b, and a connection surface 331c, similar to the third engagement portion 331. Note that the fourth engagement portion 332 has a structure symmetrical to the third engagement portion 331 in the longitudinal direction PD, and therefore a description of the structure of the fourth engagement portion 332 will be omitted.

[0145] As shown in FIG. 15, the third engaged portion 1711 has an opposing surface 1071a, an opposing surface 1071b, and a connection surface 1071c (see FIG. 13). The opposing surface 1071a is disposed closer to the fourth light source unit 1220 (+Y direction) than the opposing surface 1071b. The opposing surface 1071a faces the opposing surface 331a (see FIG. 6) of the third engaging portion 331. The opposing surface 1071b faces the opposing surface 331b (see FIG. 6) of the third engaging portion 331. The opposing surface 1071a and the opposing surface 1071b are formed substantially perpendicular to the longitudinal direction PD. In this embodiment, the connection surface 1071c (see FIG. 13) is the upper surface of the third engaged portion 1711. The connection surface 1071c connects the ends of the opposing surface 1071a and the opposing surface 1071b in the +Z direction to each other.

[0146] The fourth engaged portion 1721 has an opposing surface 1071a, an opposing surface 1071b, and a connecting surface 1071c, similar to the third engaged portion 1711. Note that the fourth engaged portion 1721 has a structure symmetrical to the third engaged portion 1711 in the longitudinal direction PD, and therefore a description of the structure of the fourth engaged portion 1721 will be omitted.

[0147] In this embodiment, the opposing surfaces 1071a and 1071b of the third engaged portion 1711 are formed to approach each other slightly toward the +Z direction. Specifically, the opposing surface 1071a of the third engaged portion 1711 is inclined by several degrees with respect to the Z direction so as to approach the opposing surface 1071b toward the +Z direction. Also, the opposing surface 1071b of the third engaged portion 1711 is inclined by several degrees with respect to the Z direction so as to approach the opposing surface 1071a toward the +Z direction. Therefore, when the third engaged portion 1711 is inserted into the third engaging portion 331, the outer surface of the third engaged portion 1711 can be prevented from getting caught on the inner surface of the third engaging portion 331.

[0148] 6, the opposing surfaces 331a and 331b of the third engaging portion 331 are formed to approach each other slightly toward the +Z direction. Specifically, the opposing surface 331a of the third engaging portion 331 is inclined by several degrees with respect to the Z direction so as to approach the opposing surface 331b toward the +Z direction. Also, the opposing surface 331b of the third engaging portion 331 is inclined by several degrees with respect to the Z direction so as to approach the opposing surface 331a toward the +Z direction. Specifically, the opposing surface 331a is approximately parallel to the opposing surface 1071a, and the opposing surface 331b is approximately parallel to the opposing surface 1071b. Therefore, when the third engaged portion 1711 is inserted into the third engaging portion 331, rattling between the third engaged portion 1711 and the third engaging portion 331 can be suppressed.

[0149] As described above, the fourth engaged portion 1721 is configured similarly to the third engaged portion 1711, and the fourth engaging portion 332 is configured similarly to the third engaging portion 331. For this reason, when the fourth engaged portion 1721 is inserted into the fourth engaging portion 332, the outer surface of the fourth engaged portion 1721 can be prevented from getting caught on the inner surface of the fourth engaging portion 332. In addition, when the fourth engaged portion 1721 is inserted into the fourth engaging portion 332, rattling between the fourth engaged portion 1721 and the fourth engaging portion 332 can be prevented.

[0150] Furthermore, the connection surface 331c of the third engaging portion 331 restricts the outward movement of the third engaged portion 1711 in the X direction. The connection surface 331c of the fourth engaging portion 332 restricts the outward movement of the fourth engaged portion 1721 in the X direction.

[0151] In this embodiment, as shown in FIG. 15, the coupling member 300 has a through hole 304 formed in the connection portion 320. The through hole 304 penetrates the connection portion 320 in the thickness direction. The through hole 304 is formed in the connection portion 320 at a position in the +Z direction of the third engaged portion 1711 and the fourth engaged portion 1721. This makes it possible to prevent the third engaged portion 1711 and the fourth engaged portion 1721 from contacting the connection portion 320 in a state in which the third engaged portion 1711 and the fourth engaged portion 1721 are inserted (engaged) into the third engaging portion 331 and the fourth engaging portion 332, respectively. This makes it possible to prevent the third engaged portion 1711 and the fourth engaged portion 1721 from being completely (to the back) inserted into the third engaging portion 331 and the fourth engaging portion 332. This makes it possible to prevent a gap from being generated between the opposing surface 1071a and the opposing surface 331a, and a gap from being generated between the opposing surface 1071b and the opposing surface 331b.

[0152] As shown in FIG. 6, the connecting member 300 has an inclined surface 313a and an inclined surface 313b formed on the wall portion 310. The inclined surface 313a is connected to an end of the opposing surface 331a in the -Z direction. The inclined surface 313b is connected to an end of the opposing surface 331b in the -Z direction. The inclined surface 313a and the inclined surface 313b are inclined so that the distance between them increases toward the -Z direction. The inclined surface 313a and the inclined surface 313b are inclined, for example, from 30 degrees to 60 degrees with respect to the Z direction. By providing the inclined surface 313a and the inclined surface 313b, when the third engaged portion 1711 is inserted into the third engaging portion 331, it is possible to prevent the third engaged portion 1711 from getting caught on the lower periphery of the opposing surface 331a and the opposing surface 331b of the wall portion 310. Similarly, when the fourth engaged portion 1721 is inserted into the fourth engaging portion 332, the fourth engaged portion 1721 can be prevented from getting caught on the opposing surface 331a of the wall portion 310 and the lower periphery of the opposing surface 331b.

[0153] Next, the structure around the base unit closing member 500 will be further described with reference to Figures 9, 12 and 16. Figure 16 is a cross-sectional perspective view showing the structure around the base unit closing member 500.

[0154] 16, each wall 510 of the base unit closing member 500 engages with an engaged portion 1007a of an engaged member 1007 arranged at an end of the third light source unit 1120 on the opposite side (-Y direction) from the fourth light source unit 1220. Hereinafter, the engaged member 1007 arranged at the end of the third light source unit 1120 on the opposite side (-Y direction) from the fourth light source unit 1220 may be referred to as an engaged member 1073. Each wall 510 has an engaging portion 531 that engages with the engaged portion 1007a of the engaged member 1073. The engaging portion 531 engages with the engaged portion 1007a having a shape different from that of the engaged portion 7a of the lighting system 1000.

[0155] The engagement portion 531 is formed on a portion of the wall portion 510 opposite to the fourth light source unit 1220 (in the -Y direction). The engagement portion 531 is a recess formed on the inner surface of the wall portion 510, for example.

[0156] When the engaging portion 531 of the base unit closing member 500 engages with the engaged portion 1007a of the engaged member 1073, the base unit closing member 500 becomes movable together with the third light source unit 1120 relative to the third base unit 1110 in the Y direction.

[0157] 12, the base unit closing member 500 is attached to the -Y direction open end 1005 of the third base unit 1110. The base unit closing member 500 is housed in the third base unit 1110. Specifically, the +Y direction end of the base unit closing member 500 is housed in the -Y direction open end 1005 of the third base unit 1110.

[0158] The base unit blocking member 500 will now be further described with reference to FIG.

[0159] 9, the position of the engaging portion 511 on the wall portion 510 and the position of the engaging portion 531 on the wall portion 510 differ in a direction intersecting with the longitudinal direction PD. In this embodiment, the position of the engaging portion 511 on the wall portion 510 and the position of the engaging portion 531 on the wall portion 510 differ in an X direction intersecting with the longitudinal direction PD (Y direction) and the Z direction. In addition, the position of the engaging portion 511 on the wall portion 510 and the position of the engaging portion 531 on the wall portion 510 differ in the Z direction.

[0160] Specifically, in this embodiment, in the wall portion 510, the engagement portion 511 is disposed on the outer side in the X direction with respect to the engagement portion 531. Also, in the wall portion 510, the engagement portion 511 is disposed on the -Z direction with respect to the engagement portion 531.

[0161] On the other hand, the position of the engaging portion 511 on the wall portion 510 and the position of the engaging portion 531 on the wall portion 510 overlap in the longitudinal direction PD. In this embodiment, the position of the engaging portion 511 on the wall portion 510 and the position of the engaging portion 531 on the wall portion 510 are substantially the same position in the longitudinal direction PD. In this manner, since the position of the engaging portion 511 on the wall portion 510 and the position of the engaging portion 531 on the wall portion 510 overlap in the longitudinal direction PD, it is possible to prevent the length of the base unit blocking member 500 from becoming longer in the longitudinal direction PD.

[0162] 9 and 16, the engaging portion 531 has an opposing surface 531a, an opposing surface 531b, and a connecting surface 531c. The opposing surfaces 531a and 531b are formed to correspond to the surface shape of the engaged portion 1007a.

[0163] Specifically, the facing surface 531a is disposed on the opposite side (-Y direction) to the fourth light source unit 1220 compared to the facing surface 531b. The facing surfaces 531a and 531b face each other in the longitudinal direction PD. The facing surfaces 531a and 531b are formed approximately perpendicular to the longitudinal direction PD. The connection surface 531c connects the X-direction ends of the facing surfaces 531a and 531b to each other.

[0164] Similarly to the third engaged portion 1711 and the fourth engaged portion 1721, the engaged portion 1007a of the engaged member 1073 has an opposing surface 1071a, an opposing surface 1071b, and a connection surface 1071c.

[0165] In this embodiment, as described above, the opposing surfaces 1071a and 1071b of the engaged portion 1007a are formed to approach each other slightly toward the +Z direction. Specifically, the opposing surface 1071a of the engaged portion 1007a is inclined by several degrees with respect to the Z direction so as to approach the opposing surface 1071b toward the +Z direction. Also, the opposing surface 1071b of the engaged portion 1007a is inclined by several degrees with respect to the Z direction so as to approach the opposing surface 1071a toward the +Z direction. Therefore, when the engaged portion 1007a is inserted into the engaging portion 531, the outer surface of the engaged portion 1007a can be prevented from getting caught on the inner surface of the engaging portion 531.

[0166] In addition, the opposing surfaces 531a and 531b of the engaging portion 531 are formed to approach each other slightly toward the +Z direction. Specifically, the opposing surface 531a of the engaging portion 531 is inclined by several degrees with respect to the Z direction so as to approach the opposing surface 531b toward the +Z direction. In addition, the opposing surface 531b of the engaging portion 531 is inclined by several degrees with respect to the Z direction so as to approach the opposing surface 531a toward the +Z direction. Specifically, the opposing surface 531a is approximately parallel to the opposing surface 1071a, and the opposing surface 531b is approximately parallel to the opposing surface 1071b. Therefore, when the engaged portion 1007a is inserted into the engaging portion 531, rattling between the engaged portion 1007a and the engaging portion 531 can be suppressed.

[0167] Furthermore, the connection surface 531c of the engaging portion 531 restricts the movement of the engaged portion 1007a of the engaged member 1073 outward in the X direction.

[0168] As shown in FIG. 9, the base unit blocking member 500 has an inclined surface 513a and an inclined surface 513b formed on the wall portion 510. The inclined surface 513a is connected to the end of the opposing surface 531a in the -Z direction. The inclined surface 513b is connected to the end of the opposing surface 531b in the -Z direction. The inclined surface 513a and the inclined surface 513b are inclined so that the distance between them increases toward the -Z direction. The inclined surface 513a and the inclined surface 513b are inclined, for example, at an angle of 30 degrees or more and 60 degrees or less with respect to the Z direction. By providing the inclined surface 513a and the inclined surface 513b, when the engaged portion 1007a is inserted into the engaging portion 531, it is possible to prevent the engaged portion 1007a from getting caught on the lower periphery of the opposing surface 531a and the opposing surface 531b of the wall portion 510.

[0169] The engaged member 1007 disposed at the end of the fourth light source unit 1220 on the opposite side (+Y direction) from the third light source unit 1120 has a structure symmetrical to the engaged member 1073 in the longitudinal direction PD. The base unit closing member 600 has a structure symmetrical to the base unit closing member 500 in the longitudinal direction PD. Therefore, the base unit closing member 600 has the same function as the base unit closing member 500.

[0170] In this embodiment, as described above, the connecting member 300 has the first engaging portion 311 that engages with the first engaged portion 711, the second engaging portion 312 that engages with the second engaged portion 721, the third engaging portion 331 that engages with the third engaged portion 1711, and the fourth engaging portion 332 that engages with the fourth engaged portion 1721. Therefore, the connecting member 300 can be shared by the light source units 120, 220, 1120, and 1220 having different structures.

[0171] Furthermore, the positions of the first engagement portion 311 and the third engagement portion 331 differ in a direction intersecting the longitudinal direction PD, and the positions of the second engagement portion 312 and the fourth engagement portion 332 differ in a direction intersecting the longitudinal direction PD. Therefore, the connecting member 300 can be easily shared by the light source units 120, 220, 1120, and 1220 having different structures.

[0172] As described above, the positions of the first engagement portion 311 and the third engagement portion 331 differ in the X direction, and the positions of the second engagement portion 312 and the fourth engagement portion 332 differ in the X direction. Therefore, the first engagement portion 311 and the third engagement portion 331 can be easily provided on one connecting member 300, and the second engagement portion 312 and the fourth engagement portion 332 can be easily provided on one connecting member 300.

[0173] As described above, the position of the first engagement portion 311 and the position of the third engagement portion 331 differ in the Z direction, and the position of the second engagement portion 312 and the position of the fourth engagement portion 332 differ in the Z direction. Therefore, the first engagement portion 311 and the third engagement portion 331 can be easily provided on one connecting member 300, and the second engagement portion 312 and the fourth engagement portion 332 can be easily provided on one connecting member 300.

[0174] As described above, the connecting member 300 has a pair of walls 310 and a connecting portion 320, and the first engaging portion 311, the second engaging portion 312, the third engaging portion 331, and the fourth engaging portion 332 are formed on each of the walls 310. Therefore, the first light source unit 120 and the second light source unit 220 can be connected on both sides in the X direction, and the third light source unit 1120 and the fourth light source unit 1220 can be connected on both sides in the X direction. This makes it possible to prevent a force from acting on only one side or the other side in the X direction on the light source units 120, 220, 1120, and 1220. Therefore, for example, it is possible to prevent the first light source unit 120 and the second light source unit 220 from being misaligned in the X direction, and the third light source unit 1120 and the fourth light source unit 1220 from being misaligned in the X direction.

[0175] As described above, the connecting member 300 is movable in the longitudinal direction PD relative to the cover 400. This makes it possible to prevent the connecting member 300 from getting caught on the cover 400 when the first light source unit 120 and the second light source unit 220 thermally expand and / or contract, for example.

[0176] As described above, the base unit closing member 500 has the engaging portion 511 that engages with the engaged portion 7a and the engaging portion 531 that engages with the engaged portion 1007a. Therefore, the base unit closing member 500 can be used in common with the light source units 120 and 1120 having different structures. The effects of the base unit closing member 500 are the same as those of the base unit closing member 600. This also applies to the following description.

[0177] Furthermore, the position of engaging portion 511 and the position of engaging portion 531 differ in the direction intersecting with the longitudinal direction PD. Therefore, base unit closing member 500 can be easily shared between light source units 120 and 1120 having different structures.

[0178] Furthermore, as described above, the position of the engaging portion 511 and the position of the engaging portion 531 are different in the X direction. Therefore, the engaging portion 511 and the engaging portion 531 can be easily provided on one base unit closing member 500.

[0179] As described above, the position of the engaging portion 511 and the position of the engaging portion 531 are different in the Z direction. Therefore, the engaging portion 511 and the engaging portion 531 can be easily provided on one base unit closing member 500.

[0180] As described above, the base unit closing member 500 has a pair of walls 510 and a connection portion 520, and the wall portions 510 are each formed with an engagement portion 511 and an engagement portion 531. Therefore, the base unit closing member 500 can be engaged with both sides of the first light source unit 120 in the X direction, and the base unit closing member 500 can be engaged with both sides of the third light source unit 1120 in the X direction. This makes it possible to prevent a force from acting on only one side or the other side of the X direction with respect to the light source units 120 and 1120. Therefore, for example, it is possible to prevent the base unit closing member 500 from being displaced in the X direction relative to the first light source unit 120, or the base unit closing member 500 from being displaced in the X direction relative to the third light source unit 1120.

[0181] As described above, the base unit closing member 500 has the lid portion 530, and the base unit closing member 500 closes the end (open end 5) of the housing 152. Therefore, it is possible to prevent dust, insects, and the like from entering the inside of the housing 152.

[0182] Next, with reference to Fig. 17, the cross-sectional structure of the lighting system 1000 described with reference to Figs. 1 to 10 will be described. Fig. 17 is a cross-sectional view showing the structure of the lighting system 1000. Here, the cross-sectional structure of the first lighting device 100 will be described. Note that the cross-sectional structure of the second lighting device 200 is similar to the cross-sectional structure of the first lighting device 100, so a description thereof will be omitted.

[0183] As shown in FIG. 17, the housing 152 has a generally U-shaped cross section as described above. The housing 152 has a first housing part 152a, a second housing part 152b, and a third housing part 152c. Each of the first housing part 152a, the second housing part 152b, and the third housing part 152c has, for example, a generally flat plate shape. The first housing part 152a is disposed generally parallel to the Y direction and the Z direction. The second housing part 152b is disposed generally parallel to the Y direction and the Z direction. The third housing part 152c is disposed generally parallel to the X direction and the Y direction.

[0184] The first housing part 152a and the second housing part 152b face each other with a gap in the X direction. The third housing part 152c is interposed between the first housing part 152a and the second housing part 152b. Specifically, the third housing part 152c connects the end part of the first housing part 152a in the +Z direction and the end part of the second housing part 152b in the +Z direction.

[0185] A first protrusion 152d and a second protrusion 152e are formed on the first housing part 152a and the second housing part 152b, respectively. The first protrusion 152d is formed on the inner surface of the first housing part 152a and protrudes inward in the X direction (towards the second housing part 152b). The second protrusion 152e is formed on the inner surface of the second housing part 152b and protrudes inward in the X direction (towards the first housing part 152a). The first protrusion 152d and the second protrusion 152e extend in the Y direction and are formed from the end of the housing 152 in the +Y direction to the end in the -Y direction.

[0186] The housing 252 has a structure symmetrical to the housing 152 in the longitudinal direction PD. Therefore, the housing 252 has a first housing part 152a, a second housing part 152b, and a third housing part 152c. The outer surface of the first housing part 152a of the housing 252 is disposed substantially flush with the outer surface of the first housing part 152a of the housing 152. The outer surface of the second housing part 152b of the housing 252 is disposed substantially flush with the outer surface of the second housing part 152b of the housing 152. The outer surface of the third housing part 152c of the housing 252 is disposed substantially flush with the outer surface of the third housing part 152c of the housing 152. This can improve the aesthetic appearance of the lighting system 1000.

[0187] The mounting spring 180 is fixed to the center of the second surface B2 of the board holding member 190 in the X direction by using a fixing member such as a screw. The mounting spring 180 has a fixed portion 181 fixed to the board holding member 190, and a first engagement piece 182a and a second engagement piece 182b extending from the end of the fixed portion 181 in the X direction toward the +Z direction. The first engagement piece 182a has a convex portion 182c that protrudes toward the first housing part 152a. The convex portion 182c is engaged with the first convex portion 152d of the first housing part 152a. The second engagement piece 182b has a convex portion 182d that protrudes toward the second housing part 152b. The convex portion 182d is engaged with the second convex portion 152e of the second housing part 152b.

[0188] The substrate holding member 190 holds the light-emitting unit 160. Specifically, as described above, the substrate holding member 190 has a first surface portion B1 that faces the facing surface A2 of the substrate 164 of the light-emitting unit 160. The substrate holding member 190 has substrate support portions 193 and 194 that are disposed on both sides of the first surface portion B1 in the X direction. The substrate support portion 193 supports the end portion of the substrate 164 in the -X direction from the -Z direction. The substrate support portion 194 supports the end portion of the substrate 164 in the +X direction from the -Z direction.

[0189] Specifically, board support portion 193 has side support portion 193a facing the side surface of board 164 in the X direction, and mounting surface support portion 193b facing mounting surface A1 of board 164. Board support portion 194 has side support portion 194a facing the side surface of board 164 in the X direction, and mounting surface support portion 194b facing mounting surface A1 of board 164.

[0190] Here, in this embodiment, the board support portion 193 has a protruding portion 193c. The protruding portion 193c protrudes from the mounting surface support portion 193b toward the center of the short side direction (X direction) of the board 164. The protruding portion 193c is disposed at a predetermined interval from the mounting surface A1 of the board 164. Therefore, a gap S1 is formed between the protruding portion 193c and the board 164. The board support portion 194 has a protruding portion 194c. The protruding portion 194c protrudes from the mounting surface support portion 194b toward the center of the short side direction (X direction) of the board 164. The protruding portion 194c is disposed at a predetermined interval from the mounting surface A1 of the board 164. Therefore, a gap S1 is formed between the protruding portion 194c and the board 164.

[0191] Furthermore, the substrate holding member 190 has a pair of cover support portions 195. The pair of cover support portions 195 support the cover member 154. Specifically, the cover support portions 195 are formed outward in the X direction from the substrate support portions 193 and 194 of the substrate holding member 190. The cover support portions 195 have a generally U-shape in cross section.

[0192] As described above, the cover member 154 has a generally U-shaped cross section. The cover member 154 has a first cover portion 154a, a second cover portion 154b, and a third cover portion 154c. Each of the first cover portion 154a, the second cover portion 154b, and the third cover portion 154c has, for example, a generally flat plate shape. The first cover portion 154a is disposed generally parallel to the Y direction and the Z direction. The second cover portion 154b is disposed generally parallel to the Y direction and the Z direction. The third cover portion 154c is disposed generally parallel to the X direction and the Y direction.

[0193] The first cover portion 154a and the second cover portion 154b face each other with a gap in the X direction. The third cover portion 154c is interposed between the first cover portion 154a and the second cover portion 154b. Specifically, the third cover portion 154c connects the end portion of the first cover portion 154a in the -Z direction and the end portion of the second cover portion 154b in the -Z direction.

[0194] In this embodiment, the outer surface of the first cover portion 154a is disposed substantially flush with the outer surface of the first housing portion 152a. The outer surface of the second cover portion 154b is disposed substantially flush with the outer surface of the second housing portion 152b. The first cover portion 154a and the first housing portion 152a are disposed substantially in a straight line. The second cover portion 154b and the second housing portion 152b are disposed substantially in a straight line. Therefore, when the cover member 154 and the housing 152 are combined, the cover member 154 and the housing 152 have a substantially rectangular shape when viewed from the outside. In this way, the outer surface of the first cover portion 154a is disposed substantially flush with the outer surface of the first housing portion 152a, and the outer surface of the second cover portion 154b is disposed substantially flush with the outer surface of the second housing portion 152b, thereby improving the aesthetic appearance.

[0195] The cover member 154 also has a pair of supported parts 156. The pair of supported parts 156 are supported by the pair of cover support parts 195, respectively. The pair of supported parts 156 are connected to the end of the first cover part 154a in the +Z direction and the end of the second cover part 154b in the +Z direction, respectively. The pair of supported parts 156 extend inward in the X direction from the first cover part 154a and the second cover part 154b in the +Z direction. The supported part 156 connected to the first cover part 154a has a portion extending in the +X direction and a portion extending in the +Z direction formed alternately. That is, the supported part 156 connected to the first cover part 154a is formed in a substantially stepped shape. The supported part 156 connected to the second cover part 154b has a portion extending in the -X direction and a portion extending in the +Z direction formed alternately. In other words, the supported portion 156 connected to the second cover portion 154b is formed in a substantially stepped shape.

[0196] The tip portions (end portions in the +Z direction) of the pair of supported portions 156 are supported by a pair of cover supporting portions 195.

[0197] The cover member 254 has a structure symmetrical to the cover member 154 in the longitudinal direction PD. Thus, the cover member 254 has a first cover portion 154a, a second cover portion 154b, and a third cover portion 154c. The outer surface of the first cover portion 154a of the cover member 254 is disposed substantially flush with the outer surface of the first cover portion 154a of the cover member 154. The outer surface of the second cover portion 154b of the cover member 254 is disposed substantially flush with the outer surface of the second cover portion 154b of the cover member 154. The outer surface of the third cover portion 154c of the cover member 254 is disposed substantially flush with the outer surface of the third cover portion 154c of the cover member 154. This can further improve the aesthetic appearance of the lighting system 1000. In addition, the aesthetic appearance of the lighting system 1000 can be improved when the first light source unit 120 and the second light source unit 220 are turned on. Specifically, since the outer surface of cover member 154 and the outer surface of cover member 254 are substantially flush with each other without any steps, the light emitted from the outer surface of cover member 154 and the outer surface of cover member 254 is substantially uninterrupted, substantially free of unevenness in brightness, and linear when first light source unit 120 and second light source unit 220 are turned on. In other words, when first light source unit 120 and second light source unit 220 are turned on, the outer surface of cover member 154 and the outer surface of cover member 254 appear to be shining substantially uninterrupted, substantially free of unevenness in brightness, and linearly.

[0198] Next, protrusions 193c and 194c of substrate holding member 190 will be further described with reference to Figures 17 and 18. Figure 18 is a view showing light-emitting section 160 and substrate holding member 190 from below.

[0199] 17, the protrusions 193c and 194c support the connection wiring 168 provided on the light-emitting unit 160. This makes it possible to prevent the connection wiring 168 from drooping downward (in the -Z direction). This makes it possible to prevent the light emitted from the light-emitting element 166 from being blocked by the connection wiring 168.

[0200] 18, the light-emitting unit 160 has a plurality of first connectors 167a and a plurality of second connectors 167b. Two first connectors 167a are provided for one board 164. Two second connectors 167b are provided for one board 164. One first connector 167a is provided at each end of the longitudinal direction PD of the board 164. One second connector 167b is provided at each end of the longitudinal direction PD of the board 164. The first connectors 167a are disposed outside the longitudinal direction PD of the board 164 with respect to the second connectors 167b.

[0201] Furthermore, the light-emitting unit 160 has a plurality of connection wirings 168. The connection wirings 168 electrically connect adjacent substrates 164 to each other. The connection wirings 168 include a connection wiring 168a having a predetermined length and a connection wiring 168b longer than the connection wiring 168a. The connection wiring 168a electrically connects the first connectors 167a of adjacent substrates 164 to each other. The connection wiring 168b electrically connects the second connectors 167b of adjacent substrates 164 to each other.

[0202] Here, connection wiring 168a has a length longer than the distance between first connectors 167a. Also, connection wiring 168b has a length longer than the distance between second connectors 167b. This, for example, can prevent a decrease in the ease of assembly when assembling first lighting device 100. Also, for example, unlike a case in which the length of connection wiring 168a is the same as the distance between first connectors 167a, it can prevent a load from being applied to the connection portion between first connectors 167a and connection wiring 168a.

[0203] In this embodiment, the center portion of connection wiring 168a in the Y direction is accommodated in gap S1 between protrusion 193c of substrate support portion 193 and substrate 164. Also, the center portion of connection wiring 168b is accommodated in gap S1 between protrusion 194c of substrate support portion 193 and substrate 164.

[0204] Next, with reference to Fig. 19, the cross-sectional structure of lighting system 2000 described with reference to Figs. 11 to 16 will be described. Fig. 19 is a cross-sectional view showing the structure of lighting system 2000. Here, the cross-sectional structure of third lighting device 1100 will be described. Note that the cross-sectional structure of fourth lighting device 1200 is similar to the cross-sectional structure of third lighting device 1100, so description thereof will be omitted.

[0205] As shown in FIG. 19, the housing 1152 has a generally U-shaped cross section as described above. The housing 1152 has a first housing part 1152a, a second housing part 1152b, and a third housing part 1152c. Each of the first housing part 1152a, the second housing part 1152b, and the third housing part 1152c has, for example, a generally flat plate shape. The first housing part 1152a is disposed generally parallel to the Y direction and the Z direction. The second housing part 1152b is disposed generally parallel to the Y direction and the Z direction. The third housing part 1152c is disposed generally parallel to the X direction and the Y direction.

[0206] The first housing part 1152a and the second housing part 1152b face each other with a gap in the X direction. The third housing part 1152c is interposed between the first housing part 1152a and the second housing part 1152b. Specifically, the third housing part 1152c connects the end part of the first housing part 1152a in the +Z direction and the end part of the second housing part 1152b in the +Z direction.

[0207] The first housing part 1152a and the second housing part 1152b are formed with a first convex part 152d and a second convex part 152e, respectively, similar to the first housing part 152a and the second housing part 152b. The first convex part 152d is formed on the inner surface of the first housing part 1152a and protrudes inward in the X direction (towards the second housing part 1152b). The second convex part 152e is formed on the inner surface of the second housing part 1152b and protrudes inward in the X direction (towards the first housing part 1152a). The first convex part 152d and the second convex part 152e extend in the Y direction and are formed from the end of the housing 1152 in the +Y direction to the end in the -Y direction.

[0208] An attachment spring 1180 is fixed to the upper part of the cover member 1154 (a fourth cover part 1154d described later). The attachment spring 1180 has a pair of fixed parts 1181 and a connecting part 1182. The connecting part 1182 connects the pair of fixed parts 1181 to each other. In this embodiment, the connecting part 1182 has a flat plate shape. The pair of fixed parts 1181 are arranged to sandwich the cover member 1154 in the X direction. The pair of fixed parts 1181 each have a protruding piece 1181a and a protruding piece 1181b that protrude inward in the X direction. A recess 1154e and a recess 1154f that are recessed inward in the X direction are formed in the upper part of the cover member 1154. The protruding piece 1181a engages with the recess 1154e, and the protruding piece 1181b engages with the recess 1154f. This causes the mounting spring 1180 to be fixed to the upper part of the cover member 1154 .

[0209] The fixed portion 1181 has an inner portion 1183 extending from the connecting portion 1182 in the -Z direction, and an outer portion 1184 extending from the end of the inner portion 1183 in the -Z direction in the +Z direction. The outer portion 1184 is disposed on the outer side in the X direction with respect to the inner portion 1183. The outer portion 1184 facing the first housing portion 1152a has a protruding portion 1184a protruding toward the first housing portion 1152a side. The protruding portion 1184a engages with the first convex portion 152d of the first housing portion 1152a. The outer portion 1184 facing the second housing portion 1152b has a protruding portion 1184b protruding toward the second housing portion 1152b side. The protruding portion 1184b engages with the second convex portion 152e of the second housing portion 1152b.

[0210] As described above, the cover member 1154 has a ring shape in cross section. The cover member 1154 has a first cover portion 1154a, a second cover portion 1154b, a third cover portion 1154c, and a fourth cover portion 1154d. Each of the first cover portion 1154a, the second cover portion 1154b, and the third cover portion 1154c has, for example, a substantially flat plate shape. The first cover portion 1154a is disposed substantially parallel to the Y direction and the Z direction. The second cover portion 1154b is disposed substantially parallel to the Y direction and the Z direction. The third cover portion 1154c is disposed substantially parallel to the X direction and the Y direction.

[0211] The first cover portion 1154a and the second cover portion 1154b face each other with a gap in the X direction. The third cover portion 1154c is interposed between the first cover portion 1154a and the second cover portion 1154b. Specifically, the third cover portion 1154c connects the end portion of the first cover portion 1154a in the -Z direction and the end portion of the second cover portion 1154b in the -Z direction.

[0212] In this embodiment, the outer surface of the first cover portion 1154a is disposed substantially flush with the outer surface of the first housing portion 1152a. The outer surface of the second cover portion 1154b is disposed substantially flush with the outer surface of the second housing portion 1152b. The first cover portion 1154a and the first housing portion 1152a are disposed substantially in a straight line. The second cover portion 1154b and the second housing portion 1152b are disposed substantially in a straight line. Therefore, when the cover member 1154 and the housing 1152 are combined, the cover member 1154 and the housing 1152 have a substantially rectangular shape when viewed from the outside. In this way, the outer surface of the first cover portion 1154a is disposed substantially flush with the outer surface of the first housing portion 1152a, and the outer surface of the second cover portion 1154b is disposed substantially flush with the outer surface of the second housing portion 152b, thereby improving the aesthetic appearance.

[0213] The fourth cover portion 1154d connects the end of the first cover portion 1154a in the +Z direction to the end of the second cover portion 1154b in the +Z direction. The fourth cover portion 1154d functions as a lid that closes the upper part of the cover member 1154.

[0214] The fourth cover portion 1154d extends inward in the X direction and in the +Z direction from the +Z end of the first cover portion 1154a and the +Z end of the second cover portion 1154b. The above-mentioned recesses 1154e and recesses 1154f are formed in the portions of the fourth cover portion 1154d facing the first housing portion 1152a and the second housing portion 1152b, respectively.

[0215] The cover member 1154 also has a pair of support portions 1156. The pair of support portions 1156 support the substrate holding member 1190. The pair of support portions 1156 are formed on the fourth cover portion 1154d near the connection portion between the first cover portion 1154a and the second cover portion 1154b. The pair of support portions 1156 protrude inward in the X direction from the inner surface of the fourth cover portion 1154d.

[0216] The substrate holding member 1190 holds the light-emitting unit 160. Specifically, as described above, the substrate holding member 1190 has a first surface portion B11 that faces the facing surface A2 of the substrate 164 of the light-emitting unit 160. The substrate holding member 1190 has a substrate support portion 1193 and a substrate support portion 1194 that are disposed on both sides in the X direction of the first surface portion B11. The substrate support portion 1193 supports the end portion of the substrate 164 in the +X direction from the -Z direction. The substrate support portion 1194 supports the end portion of the substrate 164 in the -X direction from the -Z direction.

[0217] Specifically, board support portion 1193 has side support portion 1193a facing the side surface of board 164 in the X direction, and mounting surface support portion 1193b facing mounting surface A1 of board 164. Board support portion 1194 has side support portion 1194a facing the side surface of board 164 in the X direction, and mounting surface support portion 1194b facing mounting surface A1 of board 164.

[0218] Here, in this embodiment, the board support portion 1193 has a protruding portion 1193c. The protruding portion 1193c protrudes from the mounting surface support portion 1193b toward the center of the short side direction (X direction) of the board 164. The protruding portion 1193c is disposed at a predetermined interval from the mounting surface A1 of the board 164. Therefore, a gap S11 is formed between the protruding portion 1193c and the board 164. The board support portion 1194 has a protruding portion 1194c. The protruding portion 1194c protrudes from the mounting surface support portion 1194b toward the center of the short side direction (X direction) of the board 164. The protruding portion 1194c is disposed at a predetermined interval from the mounting surface A1 of the board 164. Therefore, a gap S11 is formed between the protruding portion 1194c and the board 164.

[0219] Furthermore, the substrate holding member 1190 has a pair of cover engagement portions 1195. The pair of cover engagement portions 1195 engage with support portions 1156 of the cover member 1154 and are supported by the cover member 1154. Specifically, the cover engagement portions 1195 are formed outward in the X direction from the substrate support portions 1193 and 1194 of the substrate holding member 1190. The cover engagement portions 1195 have a generally U-shape in cross section.

[0220] Continuing to refer to FIG. 19, protrusions 1193c and 1194c of substrate holding member 1190 will now be further described.

[0221] 19, the protrusions 1193c and 1194c support the connection wiring 168 provided on the substrate 164. This makes it possible to prevent the connection wiring 168 from drooping downward (in the -Z direction). This makes it possible to prevent the light emitted from the light emitting element 166 from being blocked by the connection wiring 168.

[0222] In this embodiment, the center portion of the connection wiring 168a in the Y direction is accommodated in the gap S11 between the protrusion 1193c of the substrate support portion 1193 and the substrate 164. In addition, the center portion of the connection wiring 168b is accommodated in the gap S11 between the protrusion 1194c of the substrate support portion 1193 and the substrate 164.

[0223] The embodiments of the present invention have been described above with reference to the drawings. However, the present invention is not limited to the above-mentioned embodiments, and can be embodied in various forms without departing from the spirit of the present invention. Furthermore, the components disclosed in the above-mentioned embodiments can be modified as appropriate.

[0224] In addition, the drawings are mainly schematic illustrations of each component to facilitate understanding of the invention, and the thickness, length, number, spacing, etc. of each component shown in the drawings may differ from the actual ones due to the convenience of creating the drawings. In addition, the configurations of each component shown in the above embodiment are merely examples and are not particularly limited, and it goes without saying that various modifications are possible within a range that does not substantially deviate from the effects of the present invention.

[0225] For example, in the above embodiment, an example has been described in which the lighting system 1000 includes one connecting member 300, one first light source unit 120, and one second light source unit 220, but the present invention is not limited to this. The lighting system 1000 may include three or more light source units. In this case, the lighting system 1000 includes one less connecting member 300 than the number of light source units. That is, in this case, the lighting system 1000 includes one less connecting member 300 than the number of lighting fixtures.

[0226] In the above embodiment, an example has been described in which the positions of the first engagement portion 311 and the third engagement portion 331 are different in the X direction and the Z direction, but the present invention is not limited to this. For example, the positions of the first engagement portion 311 and the third engagement portion 331 may be the same in the X direction or the Z direction. Furthermore, the positions of the first engagement portion 311 and the third engagement portion 331 may be different in the Y direction. The same applies to the relationship between the positions of the second engagement portion 312 and the fourth engagement portion 332.

[0227] In the above embodiment, an example has been described in which the position of the engagement portion 511 (one engagement portion) and the position of the engagement portion 531 (the other engagement portion) are different in the X direction and the Z direction, but the present invention is not limited to this. For example, the position of the engagement portion 511 and the position of the engagement portion 531 may be the same in the X direction or the Z direction. Also, the position of the engagement portion 511 and the position of the engagement portion 531 may be different in the Y direction.

[0228] In the above embodiment, an example has been described in which each of the pair of wall portions 310 has the first engagement portion 311, the second engagement portion 312, the third engagement portion 331, and the fourth engagement portion 332, but the present invention is not limited to this. For example, one wall portion 310 may have at least one engagement portion among the first engagement portion 311, the second engagement portion 312, the third engagement portion 331, and the fourth engagement portion 332, and the other wall portion 310 may have the remaining engagement portion among the first engagement portion 311, the second engagement portion 312, the third engagement portion 331, and the fourth engagement portion 332.

[0229] In the above embodiment, an example has been described in which each of the pair of wall portions 510 has the engaging portion 511 and the engaging portion 531, but the present invention is not limited to this. For example, one wall portion 510 may have one of the engaging portion 511 and the engaging portion 531, and the other wall portion 510 may have the other of the engaging portion 511 and the engaging portion 531.

[0230] In the above embodiment, the connecting member 300 has a pair of wall portions 310 and the connecting portion 320 that connects the pair of wall portions 310. However, the present invention is not limited to this. For example, the connecting member 300 may have only one wall portion 310.

[0231] In the above embodiment, the base unit closing member (mounting member) 500 has a pair of walls 510 and a connecting portion 520 that connects the pair of walls 510, but the present invention is not limited to this. For example, the base unit closing member 500 may have only one wall 510. The same applies to the base unit closing member (mounting member) 600.

[0232] In the above embodiment, the first engagement portion 311 is a notch and the third engagement portion 331 is a recess, but the present invention is not limited to this. For example, the first engagement portion 311 may be a recess and the third engagement portion 331 may be a notch. In addition, both the first engagement portion 311 and the third engagement portion 331 may be a notch or a recess. In addition, the first engagement portion 311 and / or the third engagement portion 331 may have a shape other than a notch or a recess. The same applies to the second engagement portion 312 and the fourth engagement portion 332.

[0233] In the above embodiment, an example has been described in which the engaging portion 511 (one engaging portion) is a notch and the engaging portion 531 (the other engaging portion) is a recess, but the present invention is not limited to this. For example, the engaging portion 511 may be a recess and the engaging portion 531 may be a notch. Furthermore, both the engaging portion 511 and the engaging portion 531 may be a notch or a recess. Furthermore, the engaging portion 511 and / or the engaging portion 531 may have a shape other than a notch or a recess.

[0234] In the above embodiment, the connecting member 300 connects the first lighting fixture 100 and the second lighting fixture 200, which are indoor lighting fixtures, and connects the third lighting fixture 1100 and the fourth lighting fixture 1200, which are outdoor lighting fixtures, but the present invention is not limited to this. The connecting member 300 may connect an indoor lighting fixture and an outdoor lighting fixture. [Industrial Applicability]

[0235] INDUSTRIAL APPLICABILITY The present invention provides a connecting member, a mounting member, and a lighting system, and has industrial applicability. [Explanation of symbols]

[0236] 4: Open end (end of the base member in the first direction) 5: Open end (end of the base member in the first direction) 7a: Engaged part 120: First light source unit (light source unit) 152: Housing (first base member, base member) 220: Second light source unit (light source unit) 252: Housing (second base member, base member) 300: Connecting member 310: Wall 311: First engagement portion 312: Second engagement portion 320: Connection 331: Third engagement part 332: Fourth engagement part 400: Cover 500: Base unit closure member (mounting member) 510: Wall 511: Engagement portion (one engagement portion) 520: Connection 530: Lid (end wall) 531: Engaging part (other engaging part) 600: Base unit closure member (mounting member) 711: First engaged part 721: Second engaged part 1000: Lighting system 1007a: Engaged part (another engaged part) 1120: Third light source unit (other light source unit) 1152: Housing (base material) 1220: 4th light source unit (other light source unit) 1252: Housing (base material) 1711: Third engaged part 1721: 4th engaged part

Claims

1. a connecting member connecting a first light source unit having a first engaged portion and extending in a first direction to a second light source unit arranged adjacent to the first light source unit in the first direction, the second light source unit having a second engaged portion and extending in the first direction, a first engaging portion that engages with the first engaged portion; a second engaging portion that engages with the second engaged portion; Equipped with The connecting member is a third engaging portion that engages with a third engaged portion of a third light source unit having a shape different from that of the first engaged portion; a fourth engaging portion that engages with a fourth engaged portion of the fourth light source unit having a shape different from that of the third engaged portion; Further equipped with a position of the first engagement portion and a position of the third engagement portion are different in a direction intersecting the first direction, A connecting member, wherein a position of the second engagement portion and a position of the fourth engagement portion differ in a direction intersecting the first direction.

2. the first light source unit is detachably attached to a first base member in a second direction intersecting the first direction, the second light source unit is detachably attached to a second base member in the second direction; In a state in which the connecting member connects the first light source unit and the second light source unit, a position of the first engagement portion and a position of the third engagement portion differ in a third direction intersecting the first direction and the second direction, The connecting member according to claim 1 , wherein a position of the second engagement portion and a position of the fourth engagement portion differ from each other in the third direction.

3. the first light source unit is detachably attached to a first base member in a second direction intersecting the first direction, the second light source unit is detachably attached to a second base member in the second direction; In a state in which the connecting member connects the first light source unit and the second light source unit, a position of the first engagement portion and a position of the third engagement portion are different in the second direction, The connecting member according to claim 1 , wherein a position of the second engagement portion and a position of the fourth engagement portion differ from each other in the second direction.

4. A pair of wall portions arranged at a predetermined interval from each other in a direction intersecting the first direction; a connection portion that connects the pair of wall portions; Equipped with The connecting member according to claim 1 , wherein each of the walls is formed with the first engaging portion, the second engaging portion, the third engaging portion, and the fourth engaging portion.

5. A connecting member according to claim 1 ; the first light source unit and the second light source unit connected by the connecting member; A lighting system comprising:

6. a first base member to which the first light source unit is detachably attached in a second direction intersecting the first direction; a second base member to which the second light source unit is detachably attached in the second direction; a cover disposed inside the first base member and the second base member and covering the connecting member; Further equipped with The lighting system according to claim 5 , wherein the connecting member is movable in the first direction relative to the cover.

7. A mounting member that has an engaged portion and is attached to an end portion in a first direction of a light source unit that extends in a first direction, one engaging portion that engages with the engaged portion; a second engaging portion that engages with a second engaged portion of a light source unit different from the light source unit and having a shape different from the engaged portion; Equipped with A mounting member, wherein a position of the one engagement portion and a position of the other engagement portion differ in a direction intersecting the first direction.

8. the light source unit is detachably attached to a base member in a second direction intersecting the first direction, The mounting member according to claim 7 , wherein when the mounting member is attached to the light source unit, the position of the one engagement portion and the position of the other engagement portion differ in a third direction intersecting the first direction and the second direction.

9. the light source unit is detachably attached to a base member in a second direction intersecting the first direction, The mounting member according to claim 7 , wherein a position of the one engagement portion and a position of the other engagement portion differ in the second direction when the mounting member is attached to the light source unit.

10. A pair of wall portions arranged at a predetermined interval from each other in a direction intersecting the first direction; a connection portion that connects the pair of wall portions; Equipped with The mounting member according to claim 7 , wherein the one engaging portion and the other engaging portion are formed on each of the walls.

11. the light source unit is detachably attached to a base member in a second direction intersecting the first direction, the mounting member includes end wall portions disposed at ends of the pair of wall portions and the connection portion in the first direction, The mounting member according to claim 10 , wherein the mounting member closes an end of the base member in the first direction.

12. The mounting member according to claim 7 ; the light source unit to which the mounting member is attached; A lighting system comprising:

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