Lighting fixtures

Abstract

To provide lighting fixtures with improved heat dissipation performance. [Solution] The lighting fixture 200 comprises a light source unit 70 having a light source section 72 with a light-emitting element 721 that emits light, and a housing 30 that supports the light source unit 70. The housing 30 is a long member that is long in the X direction and has a first wall on the +Z side, a second wall protruding from the +Y end of the first wall to the -Z side, and a third wall protruding from the -Y end of the first wall to the -Z side. The second wall and the third wall face each other in the Y direction, and the light source unit 70 is supported by the housing 30.

Description

Technical Field

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

Background Art

[0002] A structure for attaching a large lighting fixture using a straight tube lamp to the ceiling is disclosed in Patent Document 1. The attachment device of the ceiling-embedded lighting fixture disclosed in Patent Document 1 includes a support that engages with a structure inside the ceiling. The support faces the frame portion at the lower end periphery of the fixture body in the vertical direction. By sandwiching the structure inside the ceiling together with the frame portion, the ceiling-embedded lighting fixture is attached to the ceiling.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] It is an object to enable changing the structure for cutting glare.

Means for Solving the Problems

[0005] The lighting fixture disclosed herein comprises a light source unit having a light-emitting element and emitting light, a housing, an adjustment member supported by the housing, and a light source mounting member fixed to the light source unit, wherein the housing is a long member that is longer in the X direction, with the X, Y, and Z directions being mutually orthogonal, and has a first housing wall on the +Z side, a second housing wall protruding from the +Y end of the first housing wall to the -Z side, and a third housing wall protruding from the -Y end of the first housing wall to the -Z side, the second housing wall and the third housing wall facing each other in the Y direction, the adjustment member being positioned between the second housing wall and the third housing wall, the light source unit being supported by the housing via the adjustment member when the light source mounting member is coupled to the adjustment member, and the light source unit being supported by the housing without the adjustment member when the adjustment member is removed from the housing by the light source mounting member being coupled to the housing. [Effects of the Invention]

[0006] According to this disclosure, it is possible to realize a lighting fixture in which the structure for cutting glare can be changed. [Brief explanation of the drawing]

[0007] [Figure 1] This is a side view showing a lighting system according to an embodiment of the present invention. [Figure 2] Figure 1 shows a cross-sectional view of the first lighting fixture along line AA (first specification). [Figure 3] This is an exploded perspective view of a lighting fixture according to an embodiment of the present invention. [Figure 4] This is a perspective view showing a part of a lighting system according to an embodiment of the present invention. [Figure 5] This is a perspective view of the connecting member. [Figure 6] This is a perspective view showing a part of a lighting system according to an embodiment of the present invention. [Figure 7] Another perspective view showing a part of the lighting system according to an embodiment of the present invention. [Figure 8]This is a perspective view showing a part of a lighting system according to an embodiment of the present invention. [Figure 9] Another perspective view showing a part of the lighting system according to an embodiment of the present invention. [Figure 10] This is a perspective view showing a part of a lighting system according to an embodiment of the present invention. [Figure 11] Another perspective view showing a part of the lighting system according to an embodiment of the present invention. [Figure 12] A side view showing a part of a lighting system according to an embodiment of the present invention. [Figure 13] Another side view showing a part of a lighting system according to an embodiment of the present invention. [Figure 14] This is a side view showing the lighting system of specification 2. [Figure 15] This is a cross-sectional view of the first lighting fixture along line BB in Figure 14. [Figure 16] This is a cross-sectional view of a lighting fixture conforming to specification 3. [Figure 17] This flowchart shows an example of a method for installing a lighting system according to an embodiment of the present invention. [Modes for carrying out the invention]

[0008] Embodiments of the lighting system and lighting fixture of the present invention will be described below with reference to the drawings (Figures 1 to 17). However, the present invention is not limited to the following embodiments and can be implemented in various forms without departing from its essence. In addition, explanations may be omitted where necessary to avoid repetition. Furthermore, in the figures, the same or corresponding parts are denoted by the same reference numerals and their descriptions are not repeated.

[0009] In this specification, for the sake of facilitating understanding of the invention, the X, Y, and Z directions, which are orthogonal to each other, may be used as references. For example, the X and Y directions are parallel to the horizontal direction, and the Z direction is parallel to the vertical direction. However, the X and Y directions may be parallel to directions other than the horizontal direction, and the Z direction may be parallel to directions other than the vertical direction.

[0010] First, referring to FIGS. 1 to 13, the lighting system 100 of the first specification will be described. In the present embodiment, the lighting system 100 can change the specification among the first specification to the third specification.

[0011] The lighting system 100 is used in a building that requires airtightness, such as a single-family house or an apartment house. The object (attachment object) to which the lighting system 100 is attached is a structure such as a ceiling, a wall (side wall), or a floor. Specifically, the lighting system 100 is embedded in a structure such as a ceiling, a wall (side wall), or a floor. In the present embodiment, the lighting system 100 embedded in the ceiling C (see FIG. 2) parallel to the horizontal direction will be described. When the lighting system 100 is embedded in the ceiling C (see FIG. 2), the +Z side is the upper side and the -Z side is the lower side. In the present embodiment, although the ceiling C is parallel to the horizontal direction, the ceiling to which the lighting system 100 is attached may be an inclined ceiling.

[0012] Hereinafter, the lighting system 100 of the present embodiment will be described with reference to FIG. 1. FIG. 1 is a side view showing the lighting system 100 of the present embodiment. Specifically, FIG. 1 shows the lighting system 100 of the first specification. As shown in FIG. 1, the lighting system 100 includes a first lighting fixture 200A, a second lighting fixture 200B, and a connecting member 10.

[0013] The first lighting fixture 200A and the second lighting fixture 200B emit light. The connecting member 10 connects the first lighting fixture 200A and the second lighting fixture 200B. Hereinafter, when it is not necessary to distinguish between the first lighting fixture 200A and the second lighting fixture 200B, the first lighting fixture 200A and the second lighting fixture 200B may be described as "lighting fixture 200".

[0014] As shown in Figure 1, the lighting fixture 200 comprises a housing 30, a blocking member 40, a power supply unit 50, two terminal blocks 51, a plurality of main body mounting members 60, and a light source unit 70. Hereafter, when it is necessary to distinguish between the housing 30 of the first lighting fixture 200A and the housing 30 of the second lighting fixture 200B, the housing 30 of the first lighting fixture 200A may be referred to as "first housing 30A," and the housing 30 of the second lighting fixture 200B may be referred to as "second housing 30B."

[0015] As shown in Figure 1, the connecting member 10 connects adjacent housings 30. In this embodiment, the connecting member 10 connects the first housing 30A and the second housing 30B. Specifically, the housing 30 is a long member that is elongated in the X direction. The first housing 30A and the second housing 30B (adjacent housings 30) are connected along the X direction.

[0016] Specifically, the housing 30 has a +X end and a -X end. The connecting member 10 connects the -X end of the first housing 30A (one of the two adjacent housings 30) and the +X end of the second housing 30B (the other of the two adjacent housings 30).

[0017] More specifically, the housing 30 has a first end 30a and a second end 30b. The first end 30a is one end of the housing 30 in the longitudinal direction. The second end 30b is the other end of the housing 30 in the longitudinal direction. In the example shown in Figure 1, the connecting member 10 connects the second end 30b of the first housing 30A and the first end 30a of the second housing 30B.

[0018] The housing 30 is attached to the mounting target of the lighting system 100. More specifically, the housing 30 is embedded in the mounting target. In this embodiment, the housing 30 is embedded in the ceiling C (see Figure 2).

[0019] The housing 30 supports the closure member 40, the power supply unit 50, two terminal blocks 51, multiple main body mounting members 60, and the light source unit 70. In other words, the closure member 40, the power supply unit 50, the two terminal blocks 51, multiple main body mounting members 60, and the light source unit 70 are mounted on the housing 30. The housing 30 is, for example, a single molded product. The material of the housing 30 is, for example, a metal such as aluminum. The fact that the housing 30 is made of metal improves the heat dissipation of the lighting fixture 200.

[0020] The housing 30 is open at both ends in the X direction. The closing member 40 of the first lighting fixture 200A is attached to the +X end of the first housing 30A to close the open +X end of the first housing 30A. The closing member 40 of the second lighting fixture 200B is attached to the -X end of the second housing 30B to close the open -X end of the second housing 30B. The material of the closing member 40 is the same as that of the housing 30. However, the material of the closing member 40 may be different from that of the housing 30.

[0021] The first housing 30A and the second housing 30B are connected by the -X side open end of the first housing 30A and the +X side open end of the second housing 30B. The closing member 40 of the first lighting fixture 200A is attached to the end of the first housing 30A that is not connected to the second housing 30B. The closing member 40 of the second lighting fixture 200B is attached to the end of the second housing 30B that is not connected to the first housing 30A.

[0022] The housing 30 has, for example, a roughly rectangular parallelepiped shape extending along the X direction. The power supply 50 and the two terminal blocks 51 are mounted on the wall of the housing 30 on the +Z side (one side perpendicular to the longitudinal direction of the housing 30). The power supply 50 generates power to produce light from the light-emitting element 721 (see Figure 2) based on the AC power supplied to one of the two terminal blocks 51. For example, the power supply 50 generates a DC current to produce light from the light-emitting element 721 (see Figure 2).

[0023] One of the two terminal blocks 51 is located at the first end 30a of the housing 30, and the other terminal block 51 is located at the second end 30b of the housing 30. In other words, one of the two terminal blocks 51 is located at the +X end of the housing 30, and the other terminal block 51 is located at the -X end of the housing 30.

[0024] The light source unit 70 emits light. The light source unit 70 has a cover 71. The cover 71 is, for example, a shade or a diffuser cover. The housing 30 has an open -Z side (the other side in the direction perpendicular to the longitudinal direction of the housing 30). In the first specification, the cover 71 protrudes from the open -Z side of the housing 30.

[0025] The multiple main unit mounting members 60 attach the lighting fixture 200 to the ceiling C, as will be explained with reference to Figure 2. Specifically, the multiple main unit mounting members 60 attach the housing 30 to the ceiling C. The main unit mounting members 60 are, for example, mounting brackets. The main unit mounting members 60 may also be, for example, mounting springs.

[0026] Next, the lighting fixture 200 of this embodiment will be described with reference to Figure 2. Figure 2 is a cross-sectional view of the first lighting fixture 200A along line AA in Figure 1. More specifically, Figure 2 shows a cross-section of the first lighting fixture 200A embedded in the recessed hole CH of the ceiling C. In the following, the configuration of the lighting fixture 200 will be described using the first lighting fixture 200A as an example.

[0027] As shown in Figure 2, the housing 30 has a roughly U-shape in a cross-sectional or side view. More specifically, the housing 30 has an angular, roughly U-shape in a cross-sectional or side view.

[0028] Specifically, the housing 30 has a first wall portion 31, a second wall portion 32, and a third wall portion 33. The first wall portion 31 is the wall portion on the +Z side. The second wall portion 32 is the wall portion on the +Y side. The third wall portion 33 is the wall portion on the -Y side. The second wall portion 32 protrudes in the -Z direction from the +Y end of the first wall portion 31. The third wall portion 33 protrudes in the -Z direction from the -Y end of the first wall portion 31. The second wall portion 32 and the third wall portion 33 face each other in the Y direction.

[0029] The housing 30 further has a first flange portion 34a and a second flange portion 34b. The first flange portion 34a and the second flange portion 34b protrude outward from the -Z side end of the housing 30. Specifically, the first flange portion 34a protrudes outward (to the +Y side) from the -Z side end of the second wall portion 32. The second flange portion 34b protrudes outward (to the -Y side) from the -Z side end of the third wall portion 33.

[0030] As shown in Figure 2, when the lighting fixture 200 is embedded in the recessed hole CH of the ceiling C, the first flange portion 34a and the second flange portion 34b are located on the -Z side (lower side) of the ceiling C, and the outer edge (+Y side) of the first flange portion 34a and the outer edge (-Y side) of the second flange portion 34b abut against the -Z side surface (lower surface) of the ceiling C.

[0031] As shown in Figure 2, the power supply unit 50 is attached to the first wall portion 31. More specifically, the power supply unit 50 is attached to the outer surface (+Z side) of the first wall portion 31. Therefore, the power supply unit 50 is located on the outside of the housing 30. The power supply unit 50 is fixed to the housing 30 by fasteners such as screws. The two terminal blocks 51 shown in Figure 1 are also attached to the outer surface of the first wall portion 31 in the same way as the power supply unit 50. The two terminal blocks 51 are each fixed to the housing 30 by fasteners such as screws.

[0032] As shown in Figure 2, the multiple main body mounting members 60 include a first main body mounting member 60a and a second main body mounting member 60b. The first main body mounting member 60a is attached to the outer surface (+Y side) of the second wall portion 32. The second main body mounting member 60b is attached to the outer surface (-Y side) of the third wall portion 33. The multiple main body mounting members 60 are each fixed to the housing 30 by fastening members such as screws.

[0033] In this embodiment, each of the multiple main body mounting members 60 has elastic force. Due to the elastic force of the first main body mounting member 60a and the second main body mounting member 60b, the first main body mounting member 60a and the second main body mounting member 60b, together with the first flange portion 34a and the second flange portion 34b, respectively, clamp the ceiling C. As a result, the lighting fixture 200 (housing 30) is attached to the ceiling C.

[0034] As shown in Figure 2, the lighting system 100 further comprises a sealing member 20. In this embodiment, the sealing member 20 includes a first sealing member 21. The first sealing member 21 is positioned on the +Z side surfaces of the first flange 34a and the second flange 34b to seal the gap between the first flange 34a and the second flange 34b and the ceiling C. Therefore, the first sealing member 21 improves the airtightness of the space illuminated by the lighting system 100. As a result, the airtightness and thermal insulation performance of the building in which the lighting system 100 is installed can be improved.

[0035] The first sealing member 21 may, for example, be flexible or elastic. The flexibility or elasticity of the first sealing member 21 makes it easier for the first sealing member 21 to adhere closely to the first flange 34a, the second flange 34b, and the ceiling C. As a result, the gap between the first flange 34a and the second flange 34b and the ceiling C can be sealed more easily. The first sealing member 21 is, for example, a gasket. The first sealing member 21 may also be, for example, a molded product of silicone rubber.

[0036] Next, the light source unit 70 will be described with reference to Figure 2. As shown in Figure 2, the light source unit 70 further comprises a light source section 72 and a support member 73. The light source section 72 emits light. More specifically, the light source section 72 comprises a light-emitting element 721 and a substrate 722.

[0037] The light-emitting element 721 emits light (emits light). The light-emitting element 721 is, for example, a light-emitting diode (LED). Alternatively, the light-emitting element 721 may be an organic EL (Electro-Luminescence) element or a laser diode. The light-emitting element 721 is placed on the substrate 722. Specifically, the light-emitting element 721 is attached to the mounting surface of the substrate 722. That is, the light-emitting element 721 is mounted on the substrate 722.

[0038] The light source unit 72 may be, for example, a COB (Chip on Board) structure in which a plurality of light-emitting elements 721 are mounted on the mounting surface of the substrate 722 and sealed with a phosphor. Alternatively, the light source unit 72 may be an SMD (Surface Mount Device) structure in which a unit integrating the light-emitting elements 721 and the phosphor is mounted on the mounting surface of the substrate 722 and electrically connected to the conductor of the substrate 722.

[0039] The support member 73 supports the light source unit 72. Specifically, the substrate 722 is attached to the support member 73. For example, the substrate 722 may be bonded to the support member 73 with an adhesive, or it may be fixed to the support member 73 with fasteners such as screws. The support member 73 is a metal member, such as aluminum. If the support member 73 is made of metal, it functions as a heat sink for the light source unit 72.

[0040] The support member 73 supports the cover 71 such that the cover 71 covers the light source unit 72 from the -Z side. Specifically, the inside of the cover 71 is hollow. The support member 73 supports the cover 71 such that the inner surface of the cover 71 faces the light-emitting surface of the light-emitting element 721.

[0041] The cover 71 is transparent or translucent and allows light emitted from the light-emitting element 721 (light emitted from the light-emitting element 721) to pass through. The cover 71 may, for example, diffuse the light or transmit the light without diffusion. In order to reduce the glare felt by the user from the light that has passed through the cover 71, it is preferable that the cover 71 be, for example, milky white or translucent and diffuse the light that passes through the cover 71. Furthermore, in a specification (first specification) in which the cover 71 protrudes from a structure (mounting target) such as a ceiling C, the light diffused by the cover 71 can illuminate the mounting surface of the mounting target (for example, the ceiling surface of the ceiling C) with light emitted from the side of the cover 71.

[0042] The shape of the cover 71 is approximately a rectangular prism. More specifically, the front, rear, both sides, and bottom surfaces of the cover 71 are flat. In this embodiment, the width of the bottom surface of the cover 71 is approximately equal to the height of the sides. However, the shape and dimensions of the cover 71 are not particularly limited.

[0043] In a specification (first specification) where the cover 71 protrudes from a structure (the object to be mounted) such as the ceiling C, making the cover 71 roughly rectangular prism-shaped, as in this embodiment, can create a sense of unity between the structure (e.g., the ceiling C) and the cover 71. Therefore, the lighting fixture 200 can be designed to appear as if it were part of the structure. In particular, it can prevent the lighting fixture 200 from being unnecessarily conspicuous when it is turned off.

[0044] Next, with reference to Figure 2, the structure supporting the light source unit 70 will be described. As shown in Figure 2, the lighting fixture 200 further comprises a light source mounting member 80. In addition, in the first specification lighting system 100, the lighting fixture 200 further comprises a first adjustment member 85a.

[0045] The light source mounting member 80 is fixed to the light source unit 70. In this embodiment, the light source mounting member 80 is fixed to the support member 73 by fastening members B1 such as screws. The light source mounting member 80 protrudes from the support member 73 in the +Z direction.

[0046] The inside of the housing 30 is hollow. The first adjustment member 85a is positioned inside the housing 30. Specifically, the first adjustment member 85a is fixed to the housing 30 by fastening members such as screws.

[0047] The first adjustment member 85a extends in the -Z direction from the first wall portion 31 of the housing 30. The first adjustment member 85a is detachably attached to the housing 30. The first adjustment member 85a is, for example, a metal component. The first adjustment member 85a is, for example, a integrally molded product. Specifically, the first adjustment member 85a may be made by bending sheet metal.

[0048] The light source mounting member 80 has elastic force. Due to the elastic force of the light source mounting member 80, the light source mounting member 80 engages with the first adjustment member 85a. As a result, the light source mounting member 80 is supported by the first adjustment member 85a. The light source mounting member 80 is, for example, a mounting bracket. The light source mounting member 80 may also be, for example, a mounting spring. The light source mounting member 80 is detachably attached to the first adjustment member 85a. Therefore, the light source unit 70 is detachably attached to the housing 30.

[0049] More specifically, the first adjustment member 85a has a first wall portion 86a and a second wall portion 86b. The first wall portion 86a and the second wall portion 86b extend in the -Z direction. The first wall portion 86a is located on the side of the housing 30 to the second wall portion 32 (+Y side) and faces the second wall portion 32. The second wall portion 86b is located on the side of the housing 30 to the third wall portion 33 (-Y side) and faces the third wall portion 33.

[0050] The light source mounting member 80 has a first arm portion 81a and a second arm portion 81b. The first arm portion 81a and the second arm portion 81b extend in the +Z direction. The first arm portion 81a is positioned on the second wall portion 32 side (+Y side) of the housing 30 and faces the first wall portion 86a of the first adjustment member 85a. The second arm portion 81b is positioned on the third wall portion 33 side (-Y side) of the housing 30 and faces the second wall portion 86b of the first adjustment member 85a.

[0051] The first wall portion 86a of the first adjustment member 85a has a first engagement hole 87a. The second wall portion 86b of the first adjustment member 85a has a second engagement hole 87b. The first arm portion 81a has a first curved portion 82a. The first curved portion 82a is curved so as to protrude outward (to the +Y side). The second arm portion 81b has a second curved portion 82b. The second curved portion 82b is curved so as to protrude outward (to the -Y side).

[0052] Due to the elastic force of the light source mounting member 80, the first curved portion 82a of the light source mounting member 80 engages with the first engagement hole 87a of the first adjustment member 85a, and the second curved portion 82b of the light source mounting member 80 engages with the second engagement hole 87b of the first adjustment member 85a. As a result, the light source mounting member 80 is supported by the first adjustment member 85a, and the light source unit 70 is supported by the housing 30 via the light source mounting member 80 and the first adjustment member 85a.

[0053] The first adjustment member 85a adjusts the position of the light source unit 70 in the Z direction. Specifically, the first adjustment member 85a supports the light source unit 70 (light source mounting member 80) such that the cover 71 protrudes from the -Z side surface (bottom surface) of the housing 30 and the light source section 72 is positioned inside the housing 30. Specifically, the first engagement hole 87a and the second engagement hole 87b are formed in the first wall portion 86a and the second wall portion 86b of the first adjustment member 85a, respectively, so that the light source unit 70 is held in a position where the cover 71 protrudes from the -Z side surface (bottom surface) of the housing 30 and the light source section 72 is positioned inside the housing 30.

[0054] In this embodiment, the upper end 74 of the support member 73 abuts against the lower end 88 of the first adjustment member 85a. Therefore, the position of the light source unit 70 in the Z direction is restricted by the lower end 88 of the first adjustment member 85a. In other words, when attaching the light source unit 70 to the housing 30 (first adjustment member 85a), the movement of the light source unit 70 in the +Z direction is restricted by the lower end 88 of the first adjustment member 85a.

[0055] In this embodiment, the housing 30 supports the power supply unit 50 at a position away from the light-emitting element 721. Specifically, the power supply unit 50 is positioned on the outer surface of the first wall portion 31 of the housing 30. The light source unit 72 is positioned inside the housing 30 at a position away from the first wall portion 31 of the housing 30. Therefore, according to this embodiment, the heat generated from the power supply unit 50 and the heat generated from the light source unit 72 are less likely to interfere with each other. In addition, the heat dissipation performance of the lighting fixture 200 is improved.

[0056] Furthermore, according to this embodiment, the space in which the power supply unit 50 is located and the space in which the light source unit 72 is located are separated by the housing 30. Therefore, the heat generated from the power supply unit 50 and the heat generated from the light source unit 72 are less likely to interfere with each other. In addition, the heat dissipation performance of the lighting fixture 200 is further improved.

[0057] Furthermore, according to this embodiment, the power supply unit 50 is located on the outside of the housing 30. Therefore, compared to a configuration in which the power supply unit 50 is located inside the housing 30, the height of the housing 30 can be reduced. Thus, the amount of material used for the housing 30 can be reduced.

[0058] Next, the lighting fixture 200 of this embodiment will be described with reference to Figure 3. Figure 3 is an exploded perspective view of the lighting fixture 200 of this embodiment. More specifically, Figure 3 is an exploded perspective view of the first lighting fixture 200A. In the following, the lighting fixture 200 will be described using the first lighting fixture 200A as an example.

[0059] As shown in Figure 3, the housing 30 has a first open surface 14, a second open surface 15, and a third open surface 16. The first open surface 14 is the -Z side surface of the housing 30. The first open surface 14 faces the first wall portion 31 described with reference to Figure 2. The -Z side surface of the housing 30 is open. The second open surface 15 is the end surface of the housing 30 on the first end 30a side. The third open surface 16 is the end surface of the housing 30 on the second end 30b side. Both ends of the housing 30 in the longitudinal direction are open.

[0060] As shown in Figure 3, the lighting fixture 200 of this embodiment includes four main body mounting members 60. More specifically, the lighting fixture 200 includes two first main body mounting members 60a and two second main body mounting members 60b.

[0061] One of the two first main body mounting members 60a is attached to the first end 30a side of the housing 30. The other of the two first main body mounting members 60a is attached to the second end 30b side of the housing 30. Similarly, one of the two second main body mounting members 60b is attached to the first end 30a side of the housing 30. The other of the two second main body mounting members 60b is attached to the second end 30b side of the housing 30.

[0062] As shown in Figure 3, the cover 71, substrate 722, and support member 73 extend in the X direction. The light source unit 72 has a plurality of light-emitting elements 721. Wiring for supplying power to the plurality of light-emitting elements 721 is provided on the substrate 722. The plurality of light-emitting elements 721 are arranged in a single row along the X direction. However, the arrangement of the plurality of light-emitting elements 721 is not limited to a single row. The plurality of light-emitting elements 721 may be arranged in two or more rows along the X direction, or they may be arranged in a staggered pattern.

[0063] As shown in Figure 3, the lighting fixture 200 of this embodiment comprises three first adjustment members 85a and three light source mounting members 80. The three first adjustment members 85a and the three light source mounting members 80 are arranged along the X direction.

[0064] Specifically, one of the three first adjustment members 85a is attached to the first end 30a side of the housing 30. Another of the three first adjustment members 85a is attached to the second end 30b side of the housing 30. The remaining one of the three first adjustment members 85a is attached to the center of the housing 30 in the X direction. The three light source mounting members 80 are positioned so that they can engage with each of the three first adjustment members 85a.

[0065] Next, the lighting system 100 of this embodiment will be described with reference to Figures 4 to 7. Figure 4 is a perspective view showing a part of the lighting system 100 of this embodiment. However, for the sake of explanation, the connecting member 10 is omitted in Figure 4. As shown in Figure 4, a gap G may occur between the first housing 30A and the second housing 30B. The gap G may reduce the airtightness of the space illuminated by the lighting system 100.

[0066] Figure 5 is a perspective view of the connecting member 10. As shown in Figure 5, the connecting member 10 has a first wall portion 11, a second wall portion 12, and a third wall portion 13. The first wall portion 11 is the wall portion on the +Z side. The second wall portion 12 is the wall portion on the +Y side. The third wall portion 13 is the wall portion on the -Y side. The second wall portion 12 extends in the -Z direction from the +Y end of the first wall portion 11. The third wall portion 13 extends in the -Z direction from the -Y end of the first wall portion 11. The second wall portion 12 and the third wall portion 13 face each other in the Y direction. The connecting member 10 is, for example, a metal member. The connecting member 10 is, for example, a one-piece molded product. Specifically, the connecting member 10 may be made by bending sheet metal.

[0067] As shown in Figure 5, the sealing member 20 includes a second sealing member 22. In other words, the lighting system 100 further comprises a second sealing member 22. The second sealing member 22 is located inside the connecting member 10. Specifically, the second sealing member 22 is provided on the inner surface of the first wall portion 11, the inner surface of the second wall portion 12, and the inner surface of the third wall portion 13. More specifically, the second sealing member 22 is provided continuously from the -Z end of the second wall portion 12 to the +Z end of the third wall portion 13. The second sealing member 22 may be attached to the inner surface of the connecting member 10, for example, by double-sided tape or adhesive.

[0068] Figure 6 is a perspective view showing a part of the lighting system 100 of this embodiment. Figure 7 is another perspective view showing a part of the lighting system 100 of this embodiment. As shown in Figures 4, 6, and 7, the connecting member 10 is positioned on the outside of the first housing 30A and the second housing 30B so as to face the gap G. The connecting member 10 is fixed to the first housing 30A and the second housing 30B by fastening members B2, such as screws.

[0069] As shown in Figure 6, the first wall portion 11 of the connecting member 10 faces the first wall portion 31 of the first housing 30A and the second housing 30B, and the second wall portion 12 of the connecting member 10 faces the second wall portion 32 of the first housing 30A and the second housing 30B. As shown in Figure 7, the third wall portion 13 of the connecting member 10 faces the third wall portion 33 of the first housing 30A and the second housing 30B. The second sealing member 22, which was described with reference to Figure 5, faces the gap G shown in Figure 4 and seals the gap G.

[0070] More specifically, the second sealing member 22 provided on the inner surface of the first wall portion 11 of the connecting member 10 faces the first wall portion 31 of the first housing 30A, the first wall portion 31 of the second housing 30B, and the gap G between the first wall portion 31 of the first housing 30A and the first wall portion 31 of the second housing 30B. In addition, the second sealing member 22 provided on the inner surface of the second wall portion 12 of the connecting member 10 faces the second wall portion 32 of the first housing 30A, the second wall portion 32 of the second housing 30B, and a portion of the gap G on the +Z side between the second wall portion 32 of the first housing 30A and the second wall portion 32 of the second housing 30B. The second sealing member 22, provided on the inner surface of the third wall portion 13 of the connecting member 10, faces the third wall portion 33 of the first housing 30A, the third wall portion 33 of the second housing 30B, and a portion of the gap G between the third wall portion 33 of the first housing 30A and the third wall portion 33 of the second housing 30B, specifically the portion on the +Z side.

[0071] According to this embodiment, the second sealing member 22 seals the gap G from the outside of the first housing 30A and the second housing 30B. Therefore, the second sealing member 22 improves the airtightness of the space illuminated by the lighting system 100. As a result, the thermal insulation performance of the building in which the lighting system 100 is installed can be improved.

[0072] The second sealing member 22 may also be flexible or elastic, similar to the first sealing member 21. The flexibility or elasticity of the second sealing member 22 makes it easier for it to adhere tightly to the housing 30. As a result, the gap G can be sealed more easily. The second sealing member 22, like the first sealing member 21, is, for example, a gasket. The second sealing member 22 may also be, for example, a molded product of silicone rubber.

[0073] Next, the lighting system 100 of this embodiment will be described with reference to Figures 8 and 9. Figure 8 is a perspective view showing a part of the lighting system 100 of this embodiment. Figure 9 is another perspective view showing a part of the lighting system 100 of this embodiment. However, in Figures 8 and 9, for the sake of explanation, the light source unit 70, the light source mounting member 80, and the first adjustment member 85a are omitted.

[0074] As shown in Figure 8, the sealing member 20 further includes a third sealing member 23. In other words, the lighting system 100 further comprises a third sealing member 23. The third sealing member 23 seals the gap G from the inside of the first housing 30A and the second housing 30B.

[0075] More specifically, the third sealing member 23 is positioned on the inner surfaces of the second wall portion 32 of the first housing 30A and the second wall portion 32 of the second housing 30B so as to cover a portion of the gap G between the second wall portion 32 of the first housing 30A and the second wall portion 32 of the second housing 30B on the -Z side.

[0076] Furthermore, as shown in Figure 9, the sealing member 20 further includes a fourth sealing member 24. In other words, the lighting system 100 further comprises a fourth sealing member 24. The fourth sealing member 24 seals the gap G from the inside of the first housing 30A and the second housing 30B.

[0077] More specifically, the fourth sealing member 24 is positioned on the inner surfaces of the third wall portion 33 of the first housing 30A and the third wall portion 33 of the second housing 30B so as to cover a portion of the gap G between the third wall portion 33 of the first housing 30A and the third wall portion 33 of the second housing 30B on the -Z side.

[0078] According to this embodiment, the third sealing member 23 and the fourth sealing member 24 seal the gap G from the inside of the first housing 30A and the second housing 30B. Therefore, the third sealing member 23 and the fourth sealing member 24 improve the airtightness of the space illuminated by the lighting system 100. As a result, the thermal insulation performance of the building in which the lighting system 100 is installed can be improved.

[0079] The third sealing member 23 and the fourth sealing member 24 are, for example, sealing members (tape members) having an adhesive layer on one side. Alternatively, the third sealing member 23 and the fourth sealing member 24 may be adhered to the inner surfaces of the first housing 30A and the second housing 30B with double-sided tape or adhesive. By adhering the third sealing member 23 and the fourth sealing member 24 to the inner surfaces of the first housing 30A and the second housing 30B, the third sealing member 23 and the fourth sealing member 24 can be more easily adhered to the first housing 30A and the second housing 30B.

[0080] Next, the lighting fixture 200 of this embodiment will be described with reference to Figure 10. Figure 10 is a perspective view showing a part of the lighting system 100 of this embodiment. In the following, the lighting fixture 200 will be described using the first lighting fixture 200A as an example.

[0081] As shown in Figure 10, the closing member 40 is fixed to the housing 30 by fastening members B3, such as screws. Specifically, the closing member 40 has a closing portion 41 and a flange portion 42, and the closing member 40 is fixed to the housing 30 by fastening members B3.

[0082] The closing portion 41 of the first lighting fixture 200A closes the open end on the +X side of the first housing 30A. The closing portion 41 of the second lighting fixture 200B closes the open end on the -X side of the second housing 30B. More specifically, the closing portion 41 is in close contact with the housing 30. Therefore, the airtightness of the space illuminated by the lighting system 100 can be improved. As a result, the airtightness and thermal insulation performance of the building in which the lighting system 100 is installed can be improved. An elastic member such as silicone rubber may be placed between the closing portion 41 and the housing 30. By having the elastic member sandwiched between the closing portion 41 and the housing 30, the airtightness of the space illuminated by the lighting system 100 can be further improved.

[0083] The flange portion 42 of the closing member 40 protrudes outward from the -Z side end of the closing portion 41. The flange portion 42 of the closing member 40 is connected to the first flange portion 34a and the second flange portion 34b of the housing 30. The first sealing member 21, described with reference to Figure 2, is also positioned on the +Z side surface of the flange portion 42 of the closing member 40, sealing the gap between the flange portion 42 and the ceiling C (see Figure 2). Therefore, the first sealing member 21 improves the airtightness of the space illuminated by the lighting system 100. As a result, the thermal insulation performance of the building in which the lighting system 100 is installed can be improved.

[0084] Next, the terminal block 51 will be described with reference to Figures 10 and 11. Figure 11 is another perspective view showing a part of the lighting system 100 of this embodiment. In the following description, when it is necessary to distinguish between the two terminal blocks 51, the terminal block 51 on the +X side will be referred to as "first terminal block 51a" and the terminal block 51 on the -X side will be referred to as "second terminal block 51b".

[0085] As shown in Figures 10 and 11, the terminal block 51 has a connection section 500. An external power line F1 (see Figure 12) or a feeder line F2 (see Figure 13) is connected to the connection section 500. In this embodiment, the connection section 500 includes a first connection section 501 and a second connection section 502. The external power line F1 (see Figure 12) is connected to either the first connection section 501 or the second connection section 502. Similarly, the feeder line F2 (see Figure 13) is connected to either the first connection section 501 or the second connection section 502.

[0086] Next, an example of a wiring layout for supplying power to the lighting fixture 200 will be described with reference to Figures 12 and 13. Figure 12 is a side view showing a part of the lighting system 100 of this embodiment. Figure 13 is another side view showing a part of the lighting system 100 of this embodiment.

[0087] In the lighting system 100, an external power line F1 is connected to one of the multiple lighting fixtures 200, and AC power is supplied to the remaining lighting fixtures 200 by a feed-through wiring F2. For example, as shown in Figure 12, the external power line F1 is connected to the connection part 500 of the first terminal block 51a of the first lighting fixture 200A. The external power line F1 transmits AC power supplied from the commercial power supply. The power supply unit 50 of the first lighting fixture 200A generates power to produce light from the light-emitting element 721 (see Figure 2) based on the AC power supplied to the first terminal block 51a via the external power line F1.

[0088] As shown in Figure 13, one end of the feed-through wiring F2 is connected to the connection part 500 of the second terminal block 51b of the first lighting fixture 200A, and the other end of the feed-through wiring F2 is connected to the connection part 500 of the first terminal block 51a of the second lighting fixture 200B. The feed-through wiring F2 transmits AC power from the second terminal block 51b of the first lighting fixture 200A to the first terminal block 51a of the second lighting fixture 200B.

[0089] More specifically, a portion of the AC power supplied to the first terminal block 51a of the first lighting fixture 200A is transmitted to the second terminal block 51b of the first lighting fixture 200A via wiring provided on the circuit board 722 (see Figure 3) of the first lighting fixture 200A. As a result, AC power is transmitted from the second terminal block 51b of the first lighting fixture 200A to the first terminal block 51a of the second lighting fixture 200B via the feed-through wiring F2.

[0090] The power supply unit 50 of the second lighting fixture 200B generates power to produce light from the light-emitting element 721 (see Figure 2) based on the power supplied to the first terminal block 51a via the feed-through wiring F2.

[0091] An external power line F1 may be connected to the second terminal block 51b of the second lighting fixture 200B. In this case, the power supply unit 50 of the second lighting fixture 200B generates power to produce light from the light-emitting element 721 (see Figure 2) based on the AC power supplied from the external power line F1 to the second terminal block 51b of the second lighting fixture 200B. In this case, AC power is supplied from the first terminal block 51a of the second lighting fixture 200B to the second terminal block 51b of the first lighting fixture 200A via the feed-through wiring F2. The power supply unit 50 of the first lighting fixture 200A generates power to produce light from the light-emitting element 721 (see Figure 2) based on the AC power supplied to the second terminal block 51b via the feed-through wiring F2.

[0092] Next, the second specification lighting system 100 will be described with reference to Figures 14 and 15. Figure 14 is a side view showing the second specification lighting system 100. As shown in Figure 14, in the second specification, the cover 71 does not protrude from the open surface on the -Z side of the housing 30.

[0093] Figure 15 is a cross-sectional view of the first lighting fixture 200A along line BB in Figure 14. More specifically, Figure 15 shows a cross-section of the first lighting fixture 200A embedded in the recessed hole CH in the ceiling C. Below, the configuration of the lighting fixture 200 will be explained using the first lighting fixture 200A as an example.

[0094] As shown in Figure 15, in the second specification, the cover 71 is positioned inside the housing 30. Also, in the second specification, the first adjustment member 85a, which was explained with reference to Figure 2, is not used, and the light source mounting member 80 engages directly with the housing 30.

[0095] More specifically, the second wall portion 32 and the third wall portion 33 of the housing 30 have projections 37 that protrude inward. Specifically, the projection 37 of the second wall portion 32 protrudes from the second wall portion 32 toward the -Y side. The projection 37 of the third wall portion 33 protrudes from the third wall portion 33 toward the +Y side.

[0096] In the second specification, the first curved portion 82a and the second curved portion 82b of the light source mounting member 80 engage with the projections 37 of the second wall portion 32 and the third wall portion 33 of the housing 30, respectively, due to the elastic force of the light source mounting member 80. As a result, the light source mounting member 80 is supported by the housing 30, and the light source unit 70 is supported by the housing 30 via the light source mounting member 80.

[0097] Specifically, the projections 37 are formed on the second wall portion 32 and the third wall portion 33 of the housing 30, respectively, so that the light source unit 70 is held in a position where the cover 71 is positioned inside the housing 30.

[0098] In this embodiment, stepped portions 35 are provided on the inner surfaces of the second wall portion 32 and the third wall portion 33 of the housing 30, and the upper end 71a of the cover 71 abuts against the stepped portion 35 of the housing 30. Therefore, the position of the light source unit 70 in the Z direction is restricted by the stepped portion 35 of the housing 30. In other words, when attaching the light source unit 70 to the housing 30, the movement of the light source unit 70 in the +Z direction is restricted by the stepped portion 35 of the housing 30.

[0099] As explained above with reference to Figures 14 and 15, in the second specification, the cover 71 is positioned inside the housing 30. Therefore, the lighting system 100 and lighting fixture 200 of the second specification can reduce glare compared to the first specification.

[0100] Next, the third specification of the lighting system 100 will be described with reference to Figures 14 and 16. In the third specification, as with the second specification, the cover 71 does not protrude from the open surface on the -Z side of the housing 30. Therefore, the appearance of the lighting system 100 is substantially the same as that of the lighting system 100 of the second specification shown in Figure 14.

[0101] Figure 16 is a cross-sectional view of the third specification lighting fixture 200. More specifically, Figure 16 shows a cross-section of the first lighting fixture 200A along line BB in Figure 14. The configuration of the lighting fixture 200 will be explained below using the first lighting fixture 200A as an example.

[0102] As shown in Figure 16, in the third specification, the cover 71 is located inside the housing 30, similar to the second specification. On the other hand, in the third specification, unlike the second specification, the lighting fixture 200 is equipped with a second adjustment member 85b.

[0103] The second adjustment member 85b has a shorter Z-direction length of the first wall portion 86a and the second wall portion 86b than the first adjustment member 85a. Also, the first engagement hole 87a and the second engagement hole 87b are located on the +Z side (towards the first wall portion 31 of the housing 30) than the first adjustment member 85a, and on the -Z side of the projection 37 of the housing 30 (see Figure 15). In other words, the first engagement hole 87a and the second engagement hole 87b of the second adjustment member 85b are located between the projection 37 of the housing 30 (see Figure 15) and the first engagement hole 87a and the second engagement hole 87b of the first adjustment member 85a.

[0104] Therefore, according to this embodiment, the position in which the light source unit 70 is held can be changed by the presence or absence of the second adjustment member 85b, thereby changing the structure for cutting glare. Thus, the structure for cutting glare can be changed according to the visual environment.

[0105] Furthermore, according to this embodiment, the specifications of the lighting system 100 and the lighting fixture 200 can be changed depending on whether or not the first adjustment member 85a and the second adjustment member 85b are present. Therefore, the design of the first to third specifications can be standardized, improving productivity.

[0106] Next, an example of an installation method for attaching the lighting system 100 to the ceiling C will be described with reference to Figure 17. Figure 17 is a flowchart showing an example of an installation method for the lighting system 100 of this embodiment. The installation method shown in Figure 17 includes steps 1 to 10 (steps S1 to S10).

[0107] In the first step, the worker attaches the connecting member 10 to the housing 30 (first housing 30A) of the first lighting fixture 200A, with the light source unit 70 removed (step S1). Specifically, the worker screws the connecting member 10 to the first housing 30A.

[0108] In the second step, the worker connects the external power line F1 to the first terminal block 51a of the first lighting fixture 200A (step S2).

[0109] In the third step, the worker connects one end of the feed wire F2 to the second terminal block 51b of the first lighting fixture 200A (step S3).

[0110] In the fourth step, the worker attaches the first housing 30A to the ceiling C (step S4).

[0111] In the fifth step, the worker connects the other end of the feed-through wiring F2 to the first terminal block 51a of the second lighting fixture 200B, from which the light source unit 70 has been removed (step S5).

[0112] In the sixth step, the worker attaches the second housing 30B to the ceiling C (step S6).

[0113] In the seventh step, the worker attaches the connecting member 10, which is attached to the first housing 30A, to the second housing 30B (step S7). Specifically, the worker screws screws into the second housing 30B from the inside, securing the connecting member 10 to the second housing 30B with screws.

[0114] In the eighth step, the worker attaches the third sealing member 23 and the fourth sealing member 24 to the inner surfaces of the first housing 30A and the second housing 30B so as to span across them (step S8). Specifically, the worker attaches the third sealing member 23 and the fourth sealing member 24 so that at least any gaps not sealed by the second sealing member 22 are sealed.

[0115] In step 9, the worker attaches the light source unit 70 of the first lighting fixture 200A to the first housing 30A (step S9). Alternatively, a temporary suspension cord may be attached to the light source unit 70 before attaching it to the first housing 30A (step S9).

[0116] In the tenth step, the worker attaches the light source unit 70 of the second lighting fixture 200B to the second housing 30B (step S10). Alternatively, a temporary suspension cord may be attached to the light source unit 70 before attaching it to the second housing 30B.

[0117] Embodiments of the present invention have been described above with reference to the drawings (Figures 1 to 17). However, the present invention is not limited to the embodiments described above, and can be implemented in various forms without departing from its spirit. Furthermore, the multiple components disclosed in the above embodiments can be modified as appropriate. For example, some components from all the components shown in one embodiment may be added to the components of another embodiment, or some components from all the components shown in one embodiment may be deleted from the embodiment.

[0118] The drawings schematically show each component in order to facilitate understanding of the invention, and the thickness, length, number, spacing, etc. of each component shown may differ from the actual dimensions due to the convenience of drawing creation. Furthermore, the configuration of each component shown in the above embodiments is merely an example and is not particularly limiting, and it goes without saying that various modifications are possible without substantially departing from the effects of the present invention.

[0119] For example, in the embodiment described with reference to Figures 1 to 17, the second end 30b of the first housing 30A and the first end 30a of the second housing 30B are connected, but the second end 30b of the first housing 30A and the second end 30b of the second housing 30B may be connected. In other words, the second end 30b of the second housing 30B may be located on the +X side and the first end 30a of the second housing 30B may be located on the -X side. Alternatively, the first end 30a of the first housing 30A and the second end 30b of the second housing 30B may be connected, or the first end 30a of the first housing 30A and the first end 30a of the second housing 30B may be connected. In other words, the second end 30b of the first housing 30A may be located on the +X side and the first end 30a of the first housing 30A may be located on the -X side.

[0120] Furthermore, in the embodiment described with reference to Figures 1 to 17, the lighting system 100 is equipped with two lighting fixtures 200, but the lighting system 100 may be equipped with three or more lighting fixtures 200. In other words, three or more lighting fixtures 200 may be connected along the X direction. When three or more lighting fixtures 200 are connected, the ends of the housing 30 of the intermediate lighting fixture 200, which is positioned between the lighting fixture 200 on the +X side and the lighting fixture 200 on the -X side, are open. In other words, the intermediate lighting fixture 200 does not have a closing member 40.

[0121] Furthermore, in the embodiment described with reference to Figures 1 to 17, the lighting fixture 200 is equipped with two terminal blocks 51, but the number of terminal blocks 51 may be one. In this case, for example, an external power line F1 is connected to one of the first connection part 501 and the second connection part 502 of the terminal block 51 of the first lighting fixture 200A, and one end of the feed-through wiring F2 is connected to the other of the first connection part 501 and the second connection part 502. The other end of the feed-through wiring F2 is connected to one of the first connection part 501 and the second connection part 502 of the terminal block 51 of the second lighting fixture 200B.

[0122] Furthermore, in the embodiment described with reference to Figures 1 to 17, the power supply unit 50 was located outside the housing 30, but the power supply unit 50 may also be located inside the housing 30. The housing 30 only needs to support the power supply unit 50 and the light source unit 70 in a position where thermal interference between the heat generated from the power supply unit 50 and the heat generated from the light source unit 72 does not occur, or is unlikely to occur.

[0123] Furthermore, in the embodiments described with reference to Figures 1 to 17, the lighting fixture 200 was provided with three light source mounting members 80, but the number of light source mounting members 80 is not limited to three. The lighting fixture 200 may be provided with at least two light source mounting members 80. For example, one of the at least two light source mounting members 80 may be located at the +X end of the support member 73, and the other of the at least two light source mounting members 80 may be located at the -X end of the support member 73. The number of light source mounting members 80 may be adjusted, for example, according to the length of the lighting fixture 200 (housing 30).

[0124] Furthermore, in the embodiment described with reference to Figures 1 to 17, the second sealing member 22 sealed a portion of the gap G between the second wall portion 32 of the first housing 30A and the second wall portion 32 of the second housing 30B on the +Z side. However, the second sealing member 22 may seal substantially the entire gap G between the second wall portion 32 of the first housing 30A and the second wall portion 32 of the second housing 30B. Here, substantially the entire gap refers to the entire gap G on the +Z side of the first flange portion 34a. In this case, the second wall portion 12 of the connecting member 10 may extend from the first wall portion 11 in the -Z direction so as to face the entire gap G on the +Z side of the first flange portion 34a.

[0125] Similarly, in the embodiment described with reference to Figures 1 to 17, the second sealing member 22 sealed a portion of the gap G between the third wall portion 33 of the first housing 30A and the third wall portion 33 of the second housing 30B on the +Z side. However, the second sealing member 22 may seal substantially the entire gap G between the third wall portion 33 of the first housing 30A and the third wall portion 33 of the second housing 30B. Here, substantially the entire gap refers to the entire gap G on the +Z side of the second flange portion 34b. In this case, the third wall portion 13 of the connecting member 10 may extend from the first wall portion 11 in the -Z direction so as to face the entire gap G on the +Z side of the second flange portion 34b.

[0126] Furthermore, in the embodiment described with reference to Figures 1 to 17, the third sealing member 23 covered a portion of the gap G between the second wall portion 32 of the first housing 30A and the second wall portion 32 of the second housing 30B on the -Z side. However, the third sealing member 23 may cover the entire gap G between the second wall portion 32 of the first housing 30A and the second wall portion 32 of the second housing 30B.

[0127] Similarly, in the embodiment described with reference to Figures 1 to 17, the fourth sealing member 24 covered a portion of the gap G between the third wall portion 33 of the first housing 30A and the third wall portion 33 of the second housing 30B on the -Z side. However, the fourth sealing member 24 may cover the entire gap G between the third wall portion 33 of the first housing 30A and the third wall portion 33 of the second housing 30B.

[0128] Furthermore, in the embodiment described with reference to Figures 1 to 17, the sealing member 20 includes the first sealing member 21 to the fourth sealing member 24, but the sealing member 20 may further include a fifth sealing member. The fifth sealing member is positioned on the inner surfaces of the first wall portion 31 of the first housing 30A and the first wall portion 31 of the second housing 30B, from the inside of the first housing 30A and the second housing 30B, so as to cover the gap G between the first wall portion 31 of the first housing 30A and the first wall portion 31 of the second housing 30B.

[0129] Furthermore, in the embodiment described with reference to Figures 1 to 17, the connecting member 10 is located on the outside of the housing 30, but the connecting member 10 may also be located on the inside of the housing 30. In this case, the connecting member 10 connects the first housing 30A and the second housing 30B from the inside of the first housing 30A and the second housing 30B.

[0130] Furthermore, in the embodiment described with reference to Figures 1 to 17, the second sealing member 22 to the fourth sealing member 24 cover the gap G, but the second sealing member 22 to the fourth sealing member 24 may be positioned in the gap G and sandwiched between the first housing 30A and the second housing 30B.

[0131] [Note 1] In the mounting device described in Patent Document 1, when lighting fixtures are used in a connected manner, gaps may occur between adjacent lighting fixtures. Therefore, the airtightness of the space illuminated by the lighting fixtures may be reduced.

[0132] The following disclosure has been made in view of the above-mentioned issues, and its purpose is to provide a lighting system and lighting fixtures that are less likely to reduce the airtightness of the space into which light is irradiated.

[0133] The lighting system disclosed herein comprises a first lighting fixture, a second lighting fixture, and a sealing member. The first lighting fixture comprises a first light source unit and a first housing. The first light source unit emits light. The first housing supports the first light source unit. The second lighting fixture comprises a second light source unit and a second housing. The second light source unit emits light. The second housing supports the second light source unit. The first housing and the second housing are connected. The sealing member seals the gap between the first housing and the second housing.

[0134] In the lighting system disclosed herein, the sealing member may include a first sealing member that seals the gap from the outside of the first housing and the second housing.

[0135] The lighting system disclosed herein may further include a connecting member that connects the first housing and the second housing. The connecting member is located on the outside of the first housing and the second housing. The first sealing member is located on the inside of the connecting member.

[0136] In the lighting system disclosed herein, the sealing member may include a second sealing member that seals the gap from the inside of the first housing and the second housing.

[0137] In the lighting system disclosed herein, the first housing and the second housing may be embedded in an object to which the first housing and the second housing are attached.

[0138] The luminaire disclosed herein is a luminaire used in the above-described luminaire system. The luminaire comprises a light source unit and a housing. The light source unit emits light. The housing supports the light source unit.

[0139] In the luminaire disclosed herein, the light source unit may have a light-emitting element that emits light. The luminaire may further include a power supply that generates power to cause the light-emitting element to emit light. The housing may support the power supply at a position away from the light-emitting element.

[0140] The lighting fixture disclosed herein may further include an adjustment member for adjusting the position of the light source unit. The housing may support the light source unit via the adjustment member.

[0141] [Note 2] One aspect of the present disclosure is a lighting system comprising a first lighting fixture, a second lighting fixture, a sealing member, and a connecting member, wherein the first lighting fixture comprises a first light source unit that emits light and a first housing that supports the first light source unit, and the second lighting fixture comprises a second light source unit that emits light and a second housing that supports the second light source unit, and each of the first housing and the second housing is an elongated member, and each of the first housing and the second housing has a longitudinal direction, respectively, the first light source unit or the second light source unit The first housing and the second housing, which are adjacent to each other along their longitudinal direction, are connected at their respective longitudinal ends by the connecting member, which is positioned on the outside of the first housing and the second housing, and the sealing member seals the gap between the first housing and the second housing, and the sealing member is positioned inside the connecting member and seals the gap between the first wall portion, the second wall portion and the third wall portion from the outside of the first housing and the second housing, and includes a first sealing member.

[0142] Aspect 2 of the present disclosure is the lighting system in Aspect 1, wherein the sealing member includes a second sealing member that seals the gap from the inside of the first housing and the second housing.

[0143] Aspect 3 of the present disclosure is a lighting system according to Aspect 1 or Aspect 2, wherein the first housing and the second housing are embedded in an object to which the first housing and the second housing are attached.

[0144] Aspect 4 of the present disclosure is a lighting fixture used in any of the lighting systems of aspects 1 to 3, comprising a light source unit that emits light and a housing that supports the light source unit.

[0145] Aspect 5 of the present disclosure is a lighting fixture in Aspect 4, wherein the light source unit has a light-emitting element that emits light, the lighting fixture further comprises a power supply device that generates power to cause the light-emitting element to emit light, and the housing supports the power supply device at a position away from the light-emitting element.

[0146] Aspect 6 of the present disclosure is a lighting fixture according to aspect 4 or aspect 5, further comprising an adjustment member for adjusting the position of the light source unit, wherein the housing supports the light source unit via the adjustment member.

[0147] [Note 3] Conventionally, improving the heat dissipation performance of lighting fixtures has been a challenge. The lighting fixture according to Feature 2 of this disclosure provides improved heat dissipation performance.

[0148] Embodiment 1 of Feature 2 of this Disclosure is a lighting fixture comprising a light source unit having a light-emitting element and emitting light, a power supply device that generates power to make the light-emitting element emit light, and a housing that supports the light source unit, wherein the housing is a long member that is long in the X direction, with the X, Y and Z directions being mutually orthogonal, and has a first wall portion on the +Z side, a second wall portion that protrudes from the +Y end of the first wall portion to the -Z side, and a third wall portion that protrudes from the -Y end of the first wall portion to the -Z side, the second wall portion and the third wall portion facing each other in the Y direction, the power supply device being attached to the +Z side surface of the first wall portion and arranged on the outside of the housing, and the light source portion being arranged on the inside of the housing.

[0149] Embodiment 2 of the Feature 2 of the present disclosure is a lighting fixture in Embodiment 1, wherein the light source unit further comprises a support member that supports the light source portion and a cover that transmits light emitted from the light-emitting element, and the support member supports the cover such that the cover covers the light source portion from the -Z side.

[0150] Embodiment 3 of Feature 2 of this disclosure is a lighting fixture according to Embodiment 1 or Embodiment 2, further comprising an adjustment member for adjusting the position of the light source unit in the Z direction, wherein the housing supports the light source unit via the adjustment member.

[0151] Embodiment 4 relating to Feature 2 of this disclosure is a lighting fixture according to any of Embodiments 1 to 3, wherein the housing is embedded in the mounting target, which is the ceiling, wall, or floor of a building, and the lighting fixture is mounted thereon. [Industrial applicability]

[0152] This invention is useful in the field of lighting, and in particular in lighting installed in residences such as detached houses or apartment buildings. [Explanation of Symbols]

[0153] 10: Connecting member 22:Second sealing member 23:Third sealing member 24:Fourth sealing member 30: Cabinet 30A: First enclosure 30B: Second cabinet 50: Power supply 70: Light source unit 72: Light source section 80: Light source mounting component 85a: First adjustment member 85b: Second adjustment member 100: Lighting System 200: Lighting fixtures 200A: First lighting fixture 200B: 2nd lighting fixture 721: Light-emitting element G: Gap

Claims

1. A light source unit having a light-emitting element and emitting light, The casing and The adjustment member supported by the aforementioned housing, The light source unit comprises a light source mounting member fixed to the light source unit, The X, Y, and Z directions are mutually orthogonal directions. The housing is an elongated member that is long in the X direction, and has a first housing wall on the +Z side, a second housing wall projecting from the +Y end of the first housing wall toward the -Z side, and a third housing wall projecting from the -Y end of the first housing wall toward the -Z side. The second wall portion of the housing and the third wall portion of the housing face each other in the Y direction. The adjustment member is positioned between the second wall portion of the housing and the third wall portion of the housing. The light source mounting member is coupled to the adjustment member, thereby supporting the light source unit in the housing via the adjustment member. A lighting fixture in which, when the adjustment member is removed from the housing, the light source mounting member is coupled to the housing so that the light source unit is supported by the housing without the adjustment member.

2. The aforementioned adjustment member is The adjustment member has a first wall portion arranged on the side of the second wall portion of the housing and facing the second wall portion of the housing, and a second wall portion arranged on the side of the third wall portion of the housing and facing the third wall portion of the housing. The light source mounting member has a first arm portion that is locked to the first wall portion of the adjustment member and a second arm portion that is locked to the second wall portion of the adjustment member. The lighting fixture according to claim 1, wherein when the adjustment member is removed from the housing and the light source unit is supported by the housing without the adjustment member, the first arm is locked to the second wall of the housing and the second arm is locked to the third wall of the housing.

3. The lighting fixture according to claim 2, wherein the second wall portion of the housing and the third wall portion of the housing are each provided with a projection that can engage with the first arm portion and the second arm portion, respectively.

4. The first wall portion of the adjustment member is provided with a first engagement hole into which the first arm portion can engage. The lighting fixture according to claim 2 or 3, wherein the second wall portion of the adjustment member is provided with a second engagement hole into which the second arm portion can engage.

Images