Power supply system, ceiling system and lighting system

Abstract

To achieve reduction of a load applied to a ceiling panel.SOLUTION: A power system 4 includes: a power unit 40 which supplies electric power to an equipment instrument of a system ceiling 6; and a support member 41 which supports the power unit 40. The support member 41 has: an attachment part 42 to which the power unit 40 is attached; and support parts 43 which enable the attachment part 42 to be supported by the system ceiling 6. At least one support part 43 of the support parts 43 is supported by a T bar 61 of the system ceiling 6.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a power supply system, a system ceiling, and a lighting system. More specifically, the present disclosure relates to a power supply system that supplies power to equipment installed on a system ceiling, a system ceiling including the power supply system, and a lighting system including the power supply system.

Background Art

[0002] Conventionally, a system ceiling is often installed on the ceiling of a building such as an office building. Generally, a system ceiling is a suspended ceiling formed by combining unit ceilings, and has a function that allows ceiling panels to be mounted and equipment such as lighting fixtures and air-conditioning outlets to be easily installed (see Japanese Industrial Standard A1445 "Test Method for System Ceiling Components").

[0003] The equipment installed on the system ceiling includes equipment that requires power supply such as lighting fixtures. For example, Patent Document 1 discloses a lighting fixture for a system ceiling. The lighting fixture for a system ceiling described in Patent Document 1 includes a lamp socket, a lighting device (power supply device) that supplies power to a fluorescent lamp via the lamp socket, and a fixture body to which the lamp socket and the lighting device are attached and supported by a T-bar of the system ceiling. That is, in the lighting fixture for a system ceiling described in Patent Document 1, the lighting device (power supply device) is integrally formed with the lighting fixture.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Incidentally, in some system ceilings, the lighting device (power supply) and the lighting fixture (equipment) are configured as separate units. In this case, it is conceivable to attach the power supply to the ceiling panel and have the ceiling panel support the power supply. However, ordinary ceiling panels may not have sufficient strength to support the power supply.

[0006] The purpose of this disclosure is to provide a power supply system, a system ceiling, and a lighting system that can reduce the load on ceiling panels. [Means for solving the problem]

[0007] Book A power supply system according to one aspect of the disclosure comprises a power supply device that supplies power to equipment on a system ceiling, and a support member that supports the power supply device. The support member has a mounting portion to which the power supply device is attached, and a plurality of support portions that support the mounting portion on the system ceiling. At least one of the plurality of support portions is supported by a T-bar of the system ceiling, and at least one support portion other than the support portion supported by the T-bar is supported by a suspension bolt of the system ceiling.

[0008] A system ceiling according to one aspect of the present disclosure comprises the power supply system and a T-bar supporting at least one of the plurality of support parts.

[0009] A lighting system according to one aspect of the present disclosure comprises a power supply system and a power supply device of the power supply system that is supplied with power. The aforementioned equipment and devices It has a lighting device. [Effects of the Invention]

[0010] The power supply system, ceiling system, and lighting system disclosed herein have the effect of reducing the load on the ceiling panels. [Brief explanation of the drawing]

[0011] [Figure 1]Figure 1 is a side view of a power supply system and a system ceiling according to an embodiment of the present disclosure. [Figure 2] Figure 2 is a side view of a modified example 1 of the same power supply system. [Figure 3] Figure 3 is a side view of a modified example 2 of the same power supply system. [Figure 4] Figure 4 is a perspective view of a lighting system according to an embodiment of the present disclosure. [Figure 5] Figure 5 is a plan view of the lighting device in the same lighting system. [Figure 6] Figure 6 is a cross-sectional view of the main part of the lighting device shown above. [Modes for carrying out the invention]

[0012] Hereinafter, the power supply system 4, system ceiling 6, and lighting system 5 according to embodiments of this disclosure will be described in detail with reference to the drawings. However, the figures described in the following embodiments are schematic diagrams, and the ratios of the size and thickness of each component do not necessarily reflect the actual dimensional ratios. Furthermore, the configurations described in the following embodiments are merely examples of this disclosure. This disclosure is not limited to the following embodiments, and various modifications are possible depending on the design, etc., as long as the effects of this disclosure can be achieved.

[0013] (1. Overview of the power supply system according to the embodiment) The power supply system 4 according to this embodiment (hereinafter referred to as power supply system 4) comprises a power supply device 40 that supplies power to the equipment on the system ceiling 6, and a support member 41 that supports the power supply device 40 (see Figures 1-4). The support member 41 has a mounting portion 42 to which the power supply device 40 is attached, and a plurality of support portions 43 that support the mounting portion 42 on the system ceiling 6. At least one of the plurality of support portions 43 is supported by a T-bar 61 of the system ceiling 6.

[0014] However, the power supply system 4 can reduce the load on the ceiling panel 60 by having the T-bar 61 bear at least a portion of the load of the power supply unit 40.

[0015] (2. Outline of the System Ceiling According to the Embodiment) The system ceiling 6 according to the embodiment (hereinafter abbreviated as the system ceiling 6) has a power supply system 4 and a T-bar 61 that supports at least one of the plurality of support portions 43 (see FIGS. 1 to 4).

[0016] Thus, the system ceiling 6 can reduce the load applied to the ceiling panel 60 by causing the T-bar 61 to receive at least a part of the load of the power supply device 40.

[0017] (3. Outline of the Lighting System According to the Embodiment) The lighting system 5 according to the embodiment (hereinafter abbreviated as the lighting system 5) has a power supply system 4 and a lighting device 1 to which power is supplied from the power supply device 40 of the power supply system 4 (see FIG. 4).

[0018] Thus, the lighting system 5 can reduce the load applied to the ceiling panel 60 by causing the T-bar 61 to receive at least a part of the load of the power supply device 40.

[0019] (4. Configuration of the Power Supply System) As shown in FIG. 1, the power supply system 4 includes a power supply device 40 and a support member 41. The power supply device 40 supplies power to the equipment of the system ceiling 6, such as lighting fixtures for the system ceiling.

[0020] The power supply device 40 includes a power supply circuit and a case 400 that houses the power supply circuit. The power supply circuit includes, for example, a power factor correction circuit, a step-down chopper circuit (constant current circuit), etc., and is configured to convert AC power supplied from the power grid into DC power. Note that the power supply circuit is preferably configured as a printed circuit in which various circuit components are mounted on a printed wiring board. However, the circuit configuration of the power supply circuit is merely an example and is not limited to the above circuit configuration. The case 400 is formed in a rectangular parallelepiped shape by a metal plate.

[0021] The support member 41 has a mounting portion 42 and two support portions 43. The mounting portion 42 has a mounting plate 420 and two legs 421 (see Figure 1). The mounting plate 420 is formed in a rectangular shape from a metal plate. The two legs 421 extend downward one by one from both ends in the longitudinal direction of the mounting plate 420. One support portion 43 is attached to the tip (lower end) of each leg 421. Preferably, the mounting plate 420 and the two legs 421 are formed integrally by bending a metal plate.

[0022] The support section 43 is connected to the T-bar 61 of the system ceiling 6. The T-bar 61 has a long, flat vertical section 610, a head 611 provided at one end (upper end) in the short direction of the vertical section 610, and a pair of arms 612 provided at the other end (lower end) in the short direction of the vertical section 610 (see Figure 1). The head 611 is formed in the shape of a hollow rectangular prism with both ends in the longitudinal direction open. The head 611 is connected to the upper end of the vertical section 610 at the center in the short direction on one side (bottom surface). Each of the pair of arms 612 is formed in the shape of a trough with both ends in the longitudinal direction open. Each arm 612 protrudes from the lower end of the vertical section 610 in a direction away from each other along the thickness direction of the vertical section 610. The T-bar 61 is connected to each of the suspension bolts 62 embedded in the ceiling slab of the building by a plurality of T-hangers 63 attached to each of the suspension bolts 62. Each of the plurality of T-hangers 63 is screw-fastened to a corresponding suspension bolt 62 of the plurality of suspension bolts 62 and is attached to the T-bar 61 by clamping the head 611 of the T-bar 61 from the short side of the head 611.

[0023] The support portion 43 is formed in a rectangular tube shape. A linear opening is provided on the lower surface of the support portion 43. The support portion 43 is connected to the head 611 of the T-bar 61 by being placed over the head 611 of the T-bar 61 through the opening on the lower surface (see Figure 1).

[0024] The power supply unit 40 is attached to the upper surface of the mounting plate 420 by screwing the mounting plate 420 to the case 400. The support member 41 is supported by two T-bars 61 by connecting two support parts 43 to the heads 611 of the two T-bars 61 that face each other across the ceiling panel 60 (see Figure 1). Although not shown in the figure, the power supply unit 40 has an output electrical cable and is configured to supply DC power to equipment (for example, lighting fixtures for the system ceiling) via the electrical cable.

[0025] However, the power supply system 4 can reduce the load on the ceiling panel 60 by having the T-bar 61 bear the load of the power supply unit 40 via the support member 41.

[0026] (5. Variations of the power supply system) Several modifications of the power supply system 4 according to the embodiment will be described. However, the two modifications described below (modifications 1 and 2) are characterized by the configuration of the support member 41, while the configuration other than the support member 41, i.e., the configuration of the power supply device 40, is common to the power supply system 4 according to the embodiment.

[0027] (5-1. Modification 1 of the power supply system) In the power supply system 4 of the modified example 1, the support member 41 has a mounting portion 42 to which the power supply device 40 is attached, a first support portion 44 supported by the T-bar 61, and a second support portion supported by the suspension bolt 62 (see Figure 2).

[0028] The mounting portion 42 has a mounting plate 420 formed in a rectangular shape from a metal plate, and a leg 421 that protrudes downward from the first longitudinal end (right end in Figure 2) of the mounting plate 420. In the modified example 1, it is preferable that the mounting plate 420 and the leg 421 are integrally formed by bending a single metal plate.

[0029] The first support portion 44 is formed in a hook shape. The first support portion 44 is connected to the tip (lower end) of the leg 421 of the mounting portion 42. The first support portion 44 is hooked onto the head 611 of the T-bar 61 (see Figure 2).

[0030] The second support portion is integrally formed with the mounting plate 420 at its second longitudinal end (left end in Figure 2). Specifically, a U-shaped notch is provided in the center of the short-side of the second end of the mounting plate 420, and the peripheral edge of the notch at the second end of the mounting plate 420 corresponds to the second support portion. The second support portion is supported by two nuts 64 screwed onto the suspension bolt 62, sandwiching it from the thickness direction (up and down direction) of the mounting plate 420 (see Figure 2).

[0031] However, in the modified example 1, the power supply system 4 reduces the load on the ceiling panel 60 by having the load of the power supply unit 40 supported by the T-bar 61 and suspension bolt 62 via the support member 41.

[0032] (5-2. Modification of the power supply system, part 2) In the modified example 2, the power supply system 4 uses the support member 41 as part of the ceiling panel of the system ceiling 6. That is, the support member 41 in modified example 2 has a mounting portion 42 formed in the shape of a square flat plate, and an inverted L-shaped support portion 43 provided on each of the four sides of the mounting portion 42 (see Figure 3). Preferably, the mounting portion 42 and the four support portions 43 are integrally formed from a material (for example, a metal plate) that has sufficient strength to withstand the load of the power supply unit 40 without deformation or damage.

[0033] The power supply unit 40 is attached to the upper surface of the mounting portion 42 by an appropriate method, such as screw fastening. Preferably, a sheet material made of synthetic resin, having the same design as the lower surface (front surface) of a general ceiling panel, is attached to the lower surface of the mounting portion 42.

[0034] The support member 41 is supported by each of the four T-bars 61 surrounding the support member 41, with each of the four support parts 43 resting on one of the arm parts 612 of each T-bar 61.

[0035] However, in the modified example 2, the power supply system 4 reduces the load on the ceiling panel by having the T-bar 61 bear the load of the power supply unit 40 via the support member 41.

[0036] (6. Lighting System Configuration) The lighting system 5 includes a power supply system 4 and a lighting device 1 that is powered by a power supply unit 40 of the power supply system 4 (see Figures 4-6).

[0037] (6-1. Configuration of the lighting system) The lighting device 1 includes a light source unit 2 (see Figures 4-6). The light source unit 2 has an LED module 20 and a housing 22 (see Figure 4).

[0038] The LED module 20 has a long rectangular substrate 200 and a plurality of LEDs 201 mounted on the mounting surface (bottom surface) of the substrate 200. The substrate 200 is a printed circuit board. Each of the plurality of LEDs 201 is, for example, a white LED for illumination. However, the plurality of LEDs 201 may include multiple types of white LEDs for illumination with different relative color temperatures. For example, the plurality of LEDs 201 may include incandescent LEDs and daylight LEDs. Alternatively, an organic electroluminescent element may be used as the light source instead of LEDs. The plurality of LEDs 201 are mounted on the mounting surface of the substrate 200 so as to be arranged at approximately equal intervals along the longitudinal direction of the substrate 200.

[0039] The housing 22 is formed in a long, box-like shape, having a bottom wall 220, a pair of first side walls 221, and a pair of second side walls 222 (see Figure 6). The bottom wall 220 is formed in a long, rectangular shape. Each of the pair of first side walls 221 is formed in a long, rectangular shape. Each of the pair of first side walls 221 protrudes downward from a pair of sides along the longitudinal direction of the bottom wall 220. Each of the pair of second side walls 222 is formed in a rectangular shape. Each of the pair of second side walls 222 is connected to the bottom wall 220 and the pair of first side walls 221, one at each end in the longitudinal direction. It is preferable that the housing 22 be made of a material that is a good conductor of heat, such as metal.

[0040] Grooves 223 are provided vertically on the inner surfaces of each of the pair of first side walls 221 (see Figure 6). The grooves 223 are located near the lower end of each first side wall 221. The grooves 223 are formed along the longitudinal direction of the first side wall 221 and parallel to the bottom wall 220.

[0041] The LED module 20 is housed in the housing 22, supported by a pair of first side walls 221, by inserting one end of the LED module 200 along its longitudinal direction into a pair of grooves 223 (see Figure 6). The light emitted from the LED module 20 (and its multiple LEDs 201) is emitted out of the housing 22 from the bottom surface of the housing 22.

[0042] (6-2. Ceiling Panel Configuration) The lighting device 1 is attached to the ceiling panel 3. The ceiling panel 3 comprises a main body 30, a light-transmitting section 31, a mounting member 32, and a fixing member 33 (see Figures 4-6). The main body 30 is formed in the shape of a square flat plate with a sound-absorbing structure, for example, by urethane resin. It is preferable that reinforcing aluminum sheets 303 are joined to the lower and upper surfaces of the main body 30 (see Figure 6). In the following description, the surface (lower surface) of the aluminum sheet 303 joined to the lower surface of the main body 30 will be referred to as the opposing surface 300 of the main body 30.

[0043] The main body 30 is provided with an opening 301 and a storage section 302. The opening 301 and the storage section 302 are formed so as to divide the main body 30 into two isosceles triangular plate members along the diagonal of the main body 30 (see Figure 5). In other words, the main body 30 has two adjacent triangular members 30A and 30B that sandwich the opening 301 and the storage section 302, and the opening 301 and the storage section 302 are provided so as to be sandwiched between these two members 30A and 30B.

[0044] The light-transmitting portion 31 is formed in a square shape from a light-transmitting, non-combustible material, such as glass fiber nonwoven fabric (also called glass paper). The light-transmitting portion 31 is fixed to the opposing surface 300 of the main body 30 (aluminum sheet 303) so as to cover the opposing surface 300 of the main body 30 (see Figure 6). However, the light-transmitting portion 31 is not limited to glass fiber nonwoven fabric, and may be formed from a light-transmitting synthetic resin material such as acrylic resin and polycarbonate resin. Furthermore, it is preferable that the light-transmitting portion 31 diffuses the light that is transmitted through it.

[0045] The mounting member 32 is used to attach the light source unit 2 to the main body 30 of the ceiling panel 3. The mounting member 32 has a base plate 320 and a pair of side plates 321 and is formed in the shape of a long rectangular trough (see Figures 4 and 6). The base plate 320 is formed in the shape of a long rectangle. Each of the pair of side plates 321 is formed in the shape of a long rectangle. Each of the pair of side plates 321 protrudes upward from a pair of sides along the longitudinal direction of the base plate 320. Preferably, the base plate 320 and the pair of side plates 321 are integrally formed from a light-transmitting material such as acrylic resin, polycarbonate resin, and polyethylene resin. However, the base plate 320 and the pair of side plates 321 may also be integrally formed from a light-transmitting non-combustible material such as quartz glass.

[0046] The light source unit 2 is housed inside the mounting member 32 (the space surrounded by the bottom plate 320 and a pair of side plates 321) with the LED module 20 facing the bottom plate 320 (see Figure 4). The light source unit 2 is fixed to the mounting member 32 by an appropriate method such as adhesive or screws.

[0047] Furthermore, the mounting member 32 is fixed to the main body 30 (triangular members 30A, 30B) by a plurality of fixing members 33 (four in the illustrated example) (see Figure 4). The fixing member 33 has two fixing pieces (first fixing piece 331 and second fixing piece 332) (see Figures 4 and 6). The first fixing piece 331 and the second fixing piece 332 are each formed in the shape of a rectangular flat plate. The fixing member 33 is formed in an L-shape by connecting the respective sides of the first fixing piece 331 and the second fixing piece 332 along their respective longitudinal directions. Preferably, the fixing member 33 is formed by bending a rectangular metal plate to integrally form the first fixing piece 331 and the second fixing piece 332. However, the first fixing piece 331 and the second fixing piece 332 may also be integrally formed as a molded body made of synthetic resin.

[0048] The first fixing piece 331 is fixed to the upper surface of the main body 30 of the ceiling panel 3 by an appropriate method such as adhesive or screwing. The second fixing piece 332 is fixed to the side plate 321 of the mounting member 32 that protrudes from the housing portion 302 of the main body 30 above the upper surface of the main body 30 by an appropriate method such as adhesive or screwing.

[0049] Here, it is preferable that the ceiling panel 3 has a plurality of hooking members 34 (eight in the illustrated example), as shown in Figure 4. These hooking members 34 are configured to attach the ceiling panel 3 to the T-bar 61 of the system ceiling 6 by hooking them onto the T-bar 61. One hooking member 34 is attached to each end of the four sides on the upper surface of the main body 30.

[0050] (6-3. Power System Configuration) As shown in Figure 4, the power supply system 4 includes a power supply device 40 and a support member 41. However, the power supply system 4 has the same configuration as the power supply system 4 of the previously described embodiment, except that the mounting plate 420 of the support member 41 is formed in a trapezoidal shape.

[0051] However, the power supply system 4 is supported by two T-bars 61, with each of the two support portions 43 of the support member 41 being connected to the heads 611 of two adjacent T-bars 61 that are perpendicular to each other (see Figure 4).

[0052] (6-4. Characteristics of lighting devices) The design of conventional lighting fixtures for system ceilings, particularly the design of the surface (underside) exposed to the lighting space (for example, the interior space of an office where the system ceiling 6 is installed), is completely different from the design of the surface (underside) of a normal ceiling panel 60. As a result, the lighting fixtures tended to stand out, especially when the lights were turned off.

[0053] In contrast, the lighting device 1 of the lighting system 5 is equipped with a ceiling panel 3, and illuminates the lighting space with light from an LED module 20 through an opening 301 provided on the lower surface (opposing surface 300) of the ceiling panel 3, and covers the opposing surface 300, including the opening 301, with a light-transmitting portion 31. In other words, the lighting device 1 makes the design of the opposing surface 300 exposed to the lighting space resemble the design of a normal ceiling panel 60, and by covering the opening 301 with a light-transmitting portion 31, the opening 301 can be made less noticeable even when the LED module 20 is turned off. As a result, the lighting device 1 can improve its design by making the opening 301 of the main body 30 less noticeable even when the LED module 20 is turned off.

[0054] Furthermore, by giving the light-transmitting portion 31 of the lighting device 1 a diffusive property, the opening 301 of the main body 30 can be made even less conspicuous compared to the case where the light-transmitting portion 31 does not have a diffusive property, thereby further improving the design.

[0055] Furthermore, the lighting device 1 can satisfy the provisions of the Building Standards Act (interior finish restrictions) by forming the light-transmitting portion 31 with interior materials that are flame-retardant or better (non-combustible materials, semi-non-combustible materials, and flame-retardant materials).

[0056] Furthermore, the lighting device 1 has a housing section 302 that penetrates the main body 30 of the ceiling panel 3 in the thickness direction and is connected to the opening 301, and the light source unit 2 is housed in the housing section 302. Thus, by housing the light source unit 2 in the housing section 302, the lighting device 1 can reduce the height of the main body 30 in the thickness direction (vertical direction) and achieve a low profile.

[0057] However, in the lighting device 1, the opening 301 and the housing may be formed in a straight line along one side of the main body 30. Alternatively, the opening 301 and the housing may be formed in an L-shape along two adjacent sides of the main body 30.

[0058] (7. Summary) A power supply system (4) according to a first aspect of the present disclosure comprises a power supply device (40) that supplies power to equipment on a system ceiling (6), and a support member (41) that supports the power supply device (40). The support member (41) has a mounting portion (42) to which the power supply device (40) is attached, and a plurality of support portions (43) that support the mounting portion (42) on the system ceiling (6). At least one of the plurality of support portions (43) is supported by a T-bar (61) of the system ceiling (6).

[0059] The power supply system (4) according to the first embodiment can reduce the load on the ceiling panel (60) by having the T-bar (61) bear at least a portion of the load of the power supply device (40).

[0060] A power supply system (4) according to a second aspect of this disclosure can be realized by combining it with the first aspect. In the power supply system (4) according to the second aspect, it is preferable that all of the plurality of support parts (43) are supported by the T-bar (61).

[0061] The power supply system (4) according to the second embodiment allows for greater flexibility in the mounting location relative to the system ceiling (6).

[0062] A power supply system (4) according to a third aspect of the present disclosure can be realized in combination with the first aspect. In the power supply system (4) according to the third aspect, it is preferable that at least one of the plurality of support parts (43), excluding the support part (43) supported by the T-bar (61), is supported by the suspension bolt (62) of the system ceiling (6).

[0063] The power supply system (4) according to the third embodiment can improve the mounting strength to the system ceiling (6) by distributing the load to the suspension bolts (62) and T-bars (61).

[0064] A power supply system (4) according to a fourth aspect of this disclosure can be realized by combining it with the first aspect. In the power supply system (4) according to the fourth aspect, the mounting portion (42) is preferably used in conjunction with the ceiling panel of the system ceiling (6).

[0065] The power supply system (4) according to the fourth embodiment can improve the workability of construction work.

[0066] A power supply system (4) according to a fifth aspect of this disclosure can be realized in combination with any of the first to fourth aspects. In the power supply system (4) according to the fifth aspect, the power supply device (40) preferably supplies power to a lighting device (1) which is a piece of equipment.

[0067] The power supply system (4) according to the fifth embodiment can further reduce the load on the ceiling panel (60) by making the lighting device (1) lighter.

[0068] A system ceiling (6) according to a sixth aspect of the present disclosure comprises a power supply system (4) according to any of the first to fifth aspects and a T-bar (61) that supports at least one of a plurality of support parts (43).

[0069] The system ceiling (6) according to the sixth embodiment can reduce the load on the ceiling panel (60) by having the T-bar (61) bear at least a portion of the load of the power supply unit (40).

[0070] A lighting system (5) according to a seventh aspect of the present disclosure comprises a power supply system (4) according to a fifth aspect and a lighting device (1) which is powered by a power supply unit (40) of the power supply system (4).

[0071] The lighting system (5) according to the seventh embodiment can reduce the load on the ceiling panel (60) by having the T-bar (61) bear at least a portion of the load of the power supply unit (40).

[0072] An illumination system (5) according to the eighth aspect of this disclosure can be realized by combining it with the seventh aspect. In the illumination system (5) according to the eighth aspect, the illumination device (1) preferably comprises a ceiling panel (3) and a light source (light source unit 2) attached to the ceiling panel (3). The ceiling panel (3) preferably has a plate-shaped body (30) and a light-transmitting portion (31) that is light-transmitting and covers a part of the body (30). The body (30) preferably has one or more openings (301) on the facing surface (300) that faces the illumination space. The light-transmitting portion (31) is preferably attached to the body (30) so as to cover the facing surface (300) which includes one or more openings (301). The light source is preferably attached to the body (30) and irradiates light into the illumination space through the openings (301) and the light-transmitting portion (31).

[0073] The lighting system (5) according to the eighth embodiment improves the aesthetics by covering the opposing surface (300) of the main body (30) of the ceiling panel (3) with a light-transmitting portion (31), thereby making the opening (301) of the main body (30) less noticeable even when the light source is turned off. [Explanation of Symbols]

[0074] 1. Lighting device 2. Light source unit (light source) 3. Ceiling Panel 4. Power System 5 Lighting System 6 System Ceiling 30 Main Unit 31 Translucent part 40 Power supply 41 Support member 42 Mounting part 43 Support part 61 T-bar 62 suspension bolts 300 Opposing surfaces 301 Opening

Claims

1. A power supply unit that provides power to the equipment in the system ceiling, A support member that supports the power supply unit, Equipped with, The aforementioned support member is The mounting section to which the power supply unit is attached, Multiple support parts for supporting the aforementioned mounting part on the system ceiling, It has, At least one of the plurality of support parts is supported by a T-bar of the system ceiling, and at least one support part other than the support part supported by the T-bar is supported by a suspension bolt of the system ceiling. Power supply system.

2. The power supply system of claim 1, A T-bar supporting at least one of the plurality of support parts, It has System ceiling.

3. The power supply system of claim 1, A lighting device, which is equipment that receives power from the power supply unit of the power supply system, It has Lighting system.

4. The lighting device comprises a ceiling panel and a light source attached to the ceiling panel. The ceiling panel comprises a plate-shaped main body and a light-transmitting portion that covers a part of the main body, The main body has one or more openings on the surface facing the lighting space, The light-transmitting portion is attached to the main body so as to cover the opposing surface including one or more openings. The light source is attached to the main body and irradiates light into the illuminated space through the opening and the light-transmitting portion. The lighting system according to claim 3.

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