Light fixture

Abstract

To expand a light emitting area while enabling radio communication.SOLUTION: A light fixture comprises: a plurality of LED modules 3; a support member which supports each LED module 3; a power supply which supplies electric power to each LED module 3 to light the same; and a radio communication device which receives radio signals using electromagnetic waves as a medium. Each LED module 3 has flat plate-shaped base plates 31, and a plurality of LEDs 30 mounted on surfaces of the base plates 31. The support member has a first through hole positioned opposite to an antenna. Each base plate 31 has a second through hole 310 located at a position opposite to the first through hole and a section (screw insertion hole 311) for a mounting member to attach the base plate 31 to the support member is arranged. The second through hole 310 and the screw insertion hole 311 are positioned between two adjacent rows of the plurality of LEDs 30, mounted on the surface of the base plate 31, which is arranged in multiple rows.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present disclosure relates to a lighting fixture, and more particularly to a lighting fixture capable of wireless communication using electromagnetic waves as a medium. [Background technology]

[0002] As a conventional example, the lighting device described in Patent Document 1 is exemplified. The lighting device described in Patent Document 1 (hereinafter referred to as the conventional example) includes a fixture body that is attached to a ceiling or the like, and a light-emitting unit that is attached to the fixture body. The light-emitting unit includes a light-emitting element substrate on which multiple light-emitting elements are mounted, a light-emitting element support member that supports the light-emitting element substrate, a power supply unit, a translucent cover, and a wireless module.

[0003] The wireless module has an antenna, a wireless control circuit that controls a power supply unit in response to a signal received by the antenna, and a housing that houses the antenna and wireless control circuit. The housing is L-shaped in side view and is attached to the upper surface of the light-emitting element support member. An opening is provided in the light-emitting element support member, and a part of the housing (a guide portion) protrudes from the lower surface of the light-emitting element support member through the opening. The antenna is housed in the guide portion of the housing.

[0004] In other words, the wireless module can receive radio signals using the antenna protruding from the bottom surface of the metal light-emitting element support member without being blocked by the light-emitting element support member. Note that the opening in the light-emitting element support member is located at a position that does not overlap with the light-emitting element substrate when viewed from the thickness direction (vertical direction) of the light-emitting element support member. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-33708 Summary of the Invention [Problem to be solved by the invention]

[0006] In the conventional lighting device (lighting fixture), the opening through which the guide portion of the housing containing the antenna is inserted is provided in the light-emitting element support member so as to avoid the light-emitting element substrate, which makes it difficult to increase the light-emitting area (the area of the surface of the light-emitting element substrate on which the light-emitting elements are mounted).

[0007] An object of the present disclosure is to provide a lighting fixture that enables wireless communication while increasing the light-emitting area. [Means for solving the problem]

[0008] A lighting fixture according to one aspect of the present disclosure includes a plurality of light source modules, a support member supporting the plurality of light source modules, a power supply device that supplies power to the plurality of light source modules to light them, and a wireless communication device that receives wireless signals transmitted via electromagnetic waves. Each of the plurality of light source modules includes a flat substrate and a plurality of light-emitting elements mounted on a surface of the substrate. The power supply device is configured to adjust the power supplied to the plurality of light source modules in response to the wireless signals received by the wireless communication device. The wireless communication device includes an antenna for receiving the wireless signals transmitted via radio waves. The support member has a first surface on which the plurality of light source modules are attached, and a second surface on which the wireless communication device is disposed opposite the first surface. The support member has a first through hole disposed opposite the antenna. The substrate of one of the plurality of light source modules includes a second through hole disposed opposite the first through hole and a portion on which an attachment member for attaching the substrate to the support member is disposed. The second through hole and the portion are provided on the surface of the substrate of the one light source module at a position sandwiched between two adjacent rows of the plurality of light emitting elements mounted in a plurality of rows. The wireless communication device is disposed on the second surface of the support member so as to electromagnetically expose the antenna through the first through hole and the second through hole. [Effects of the Invention]

[0009] The lighting fixture of the present disclosure has the advantage of being able to increase the light-emitting area while enabling wireless communication. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a perspective view of a lighting fixture according to an embodiment of the present disclosure, viewed obliquely from above. [Figure 2] FIG. 2 is an exploded perspective view of the same. [Figure 3] FIG. 3 is a perspective view of the same as seen from diagonally below. [Figure 4] FIG. 4 is a bottom view of the same with the panel of the light source unit omitted. [Figure 5] FIG. 5 is a top view of the light source unit in the same. [Figure 6] FIG. 6 is a bottom view of the LED module shown in FIG. [Figure 7] FIG. 7 is an exploded perspective view of the wireless communication device. [Figure 8] FIG. 8 is a cross-sectional view of a main part of the lighting fixture. [Figure 9] FIG. 9 is a bottom view of a main part of the light source unit of the same. [Figure 10] FIG. 10 is a cross-sectional view of a main part of a light source unit in a first modification of the lighting fixture. [Figure 11] FIG. 11 is a cross-sectional view of a main part of a light source unit in a second modification of the lighting fixture. DETAILED DESCRIPTION OF THE INVENTION

[0011] A lighting device according to an embodiment of the present disclosure will be described in detail with reference to the drawings. However, the drawings described in the following embodiments are schematic diagrams, and the ratios of the sizes and thicknesses of the components do not necessarily reflect the actual dimensional ratios. Note that the configurations described in the following embodiments are merely examples of the present disclosure. The present disclosure is not limited to the following embodiments, and various modifications are possible depending on the design, etc., as long as the effects of the present disclosure can be achieved.

[0012] (1) Overview of the lighting fixture according to the embodiment The lighting fixture A1 according to this embodiment includes one or more light source modules (LED modules 3), a support member 4, a power supply device 60, and a wireless communication device 7. The support member 4 supports the LED modules 3. The power supply device 60 supplies power to the LED modules 3 to light them up. The wireless communication device 7 receives wireless signals transmitted via electromagnetic waves.

[0013] The LED module 3 has a substrate 31 and a plurality of light-emitting elements (LEDs 30) mounted on the surface of the substrate 31. The power supply device 60 is configured to adjust the power supplied to the LED module 3 in accordance with a wireless signal received by the wireless communication device 7.

[0014] The wireless communication device 7 has an antenna 73 for receiving a wireless signal transmitted via radio waves. The support member 4 has a mounting plate (bottom plate 400) on a first surface of which the LED module 3 is attached and on a second surface opposite the first surface of which the wireless communication device 7 is disposed. The bottom plate 400 has a first through-hole 402 formed therein at a position opposite to the antenna 73. The substrate 31 has a second through-hole 310 formed therein at a position opposite to the first through-hole 402. The wireless communication device 7 is disposed on the second surface of the bottom plate 400 so that the antenna 73 is electromagnetically exposed through the first through-hole 402 and the second through-hole 310.

[0015] Thus, in the lighting fixture A1 according to the embodiment, the wireless communication device 7 can be disposed at a position where the antenna 73 and the substrate 31 of the LED module 3 overlap when viewed from the thickness direction of the mounting plate (bottom plate 400). As a result, the lighting fixture A1 according to the embodiment can have a larger substrate 31 than the conventional example, and therefore can increase the light-emitting area (the area of the surface of the substrate 31 on which the LEDs 30 are mounted) while enabling wireless communication.

[0016] (2) Details of the lighting fixture according to the embodiment A lighting fixture A1 according to this embodiment (hereinafter simply referred to as lighting fixture A1) includes a fixture body 1 and a light source unit 2 (see FIGS. 1 to 3). The lighting fixture A1 is installed, for example, by embedding the fixture body 1 in a recessed hole provided in a ceiling material inside a building. In the following description, unless otherwise specified, the up-down, left-right, and front-to-back directions indicated by arrows in FIG. 2 are defined as the up-down, left-right, and front-to-back directions of the lighting fixture A1.

[0017] (2-1) Device body The fixture body 1 is formed in a box shape with a square opening on the bottom surface by combining a cylindrical body 10 formed in a square cylindrical shape with a top plate 11 formed in a rectangular flat plate shape (see FIG. 2). The top plate 11 is formed so that its length in the left-right direction is shorter than that of the cylindrical body 10. Therefore, a rectangular window hole 12 opens at the left end on the top surface of the fixture body 1 (see FIGS. 1 and 2).

[0018] The cylindrical body 10 has a pair of first side walls 101 facing each other in the left-right direction and a pair of second side walls 102 facing each other in the front-rear direction. Each of the pair of first side walls 101 and the pair of second side walls 102 is formed in a long rectangular shape. However, a step portion 104 is formed at the upper end portion of each of the pair of second side walls 102, spanning the entire length in the front-rear direction. Furthermore, three holes are formed in the step portion 104 of each second side wall 102, equidistantly spaced in the left-right direction. In the following description, the edges of each hole in the step portion 104 of each second side wall 102 are referred to as holding portions 103.

[0019] The pair of first side walls 101 and the pair of second side walls 102 are each formed of a metal plate. The cylindrical body 10 is formed by joining both longitudinal ends (front and rear ends) of the pair of first side walls 101 and both longitudinal ends (left and right ends) of the pair of second side walls 102 by an appropriate method such as welding.

[0020] Top plate 11 is formed into a rectangular flat plate from a metal plate. A power terminal block 13 and signal terminals 14 are attached to the underside of top plate 11 (see FIG. 2). Two cable insertion holes 110, through which a power cable for power supply is inserted, are provided at a distance from each other in the center of top plate 11. Furthermore, a plurality of bolt insertion holes 111, through which suspension bolts embedded in the ceiling frame of a building can be inserted, are provided at a distance from each other in the front-to-rear direction on the left end of top plate 11.

[0021] The fixture body 1 is inserted into an embedding hole in a ceiling material, and is fixed to a plurality of hanging bolts by tightening nuts onto the hanging bolts inserted into the bolt insertion holes 111 in the top plate 11, and is embedded in the ceiling.

[0022] (2-2) Light source unit The light source unit 2 includes a plurality of (five in the illustrated example) LED modules 3, a support member 4, four mounting springs 5, a power supply unit 6, and the like (see FIGS. 1 to 5).

[0023] (2-2-1) LED module The LED module 3 has a plurality of LEDs 30, a rectangular substrate 31, and two terminal fittings 32 (see FIG. 6). The plurality of LEDs 30 are, for example, packaged white LEDs for lighting. The substrate 31 is formed in the shape of a rectangular flat plate. The plurality of LEDs 30 are mounted on the lower surface (first surface) of the substrate 31 so as to be arranged at equal intervals along the longitudinal direction of the substrate 31 and to be arranged in four rows along the lateral direction of the substrate 31 (see FIG. 6).

[0024] The two terminal fittings 32 are mounted near a first longitudinal end 31A on the lower surface of the substrate 31. The two terminal fittings 32 are a positive terminal fitting 32A and a negative terminal fitting 32B.

[0025] Furthermore, a conductor 33 for electrically connecting the plurality of LEDs 30 and the two terminal fittings 32 is formed on the underside of the substrate 31 (see FIG. 6). The conductor 33 is formed so as to extend back and forth from the first end 31A to the second end 31B in the longitudinal direction of the substrate 31. However, although the conductor 33 is represented by a thin straight line in FIG. 6, the shape and size of the conductor 33 are not limited to those shown in the figure.

[0026] A plurality of (three in the illustrated example) screw insertion holes 311, one second through hole 310, and a plurality of (two in the illustrated example) positioning holes 312 are provided in the center of the substrate 31 in the short side direction. Each screw insertion hole 311 is a hole through which a screw for screwing the substrate 31 is inserted. Each positioning hole 312 is a hole through which a positioning protrusion provided on the bottom plate 400, which will be described later, is inserted. The three screw insertion holes 311 and two positioning holes 312 are aligned in a row at intervals along the longitudinal direction of the substrate 31. Each screw insertion hole 311 is formed in an oval shape with the longitudinal direction of the substrate 31 as its major axis.

[0027] The second through hole 310 is provided at a position closer to the first end 31A than to the second end 31B in the longitudinal direction of the substrate 31. The second through hole 310 is formed in an elliptical shape with its major axis aligned with the longitudinal direction of the substrate 31 (see FIG. 6).

[0028] (2-2-2) Power supply unit The power supply unit 6 has a power supply device 60, a wireless communication device 7, and a support plate 62 that supports the power supply device 60 and the wireless communication device 7 (see FIG. 5).

[0029] (2-2-2-1) Power supply device The power supply device 60 has a power supply circuit configured by mounting electronic components on a printed wiring board, and a first case 600 that houses the power supply circuit. The power supply circuit is configured to convert AC power supplied from a commercial power system via a power cable connected to the power supply terminal block 13 into DC power and supply it to the LED module 3. As shown in Fig. 5, the first case 600 is formed into a long box shape using a metal plate material.

[0030] (2-2-2-2) Wireless communication device As shown in FIGS. 5, 7, and 8, the wireless communication device 7 includes a circuit block 70, a second case 71, a signal cable 700, and the like. The circuit block 70 has a circuit board 72. The circuit board 72 is formed in a T-shape (see FIG. 7). In the circuit board 72, the surface of the portion corresponding to the vertical bar of the T-shape is called a first region 721, and the surface of the portion corresponding to the horizontal bar of the T-shape is called a second region 722 (see FIG. 7). An antenna 73 made of a microstrip antenna (also called a patch antenna) is formed in the first region 721. The antenna 73 is configured to receive wireless signals transmitted via radio waves in the 920 MHz band, for example.

[0031] The second area 722 is formed with a signal processing circuit that acquires control information from a wireless signal received by the antenna 73 and transmits a control signal including the acquired control information to the power supply device 60 via the signal cable 700. The control information includes information for causing the power supply device 60 to turn on and off the operation of the power supply device 60 (turn on and off the LED module 3) and increase or decrease the output of the power supply device 60 (dimming the LED module 3).

[0032] Additionally, the second region 722 is equipped with a light receiving element 74 that receives an infrared signal transmitted via infrared light (see FIG. 7). The signal processing circuit acquires setting information from the infrared signal received by the light receiving element 74 and performs setting processing based on the acquired setting information. The setting information includes, for example, a command for initializing unique identification information assigned to multiple lighting fixtures A1. When the signal processing circuit receives the setting information (initialization command), it initializes the identification information and other information stored in the built-in memory of the microcontroller that constitutes the signal processing circuit.

[0033] As shown in Fig. 7, the second case 71 includes a body 710 and a cover 711. The body 710 is made of a box-shaped synthetic resin molded body with one surface (bottom) open. The body 710 has two side walls facing each other in the short direction, one of which is provided with an insertion groove 7100 through which the signal cable 700 is inserted. The body 710 also has two female threaded portions 7101. Furthermore, the body 710 has two side walls facing each other in the long direction, each of which is provided with a pair of hook holes 7102 aligned in the short direction.

[0034] The cover 711 has a roughly rectangular plate-shaped lid body 7110, two pairs of fixed legs 7111, and an antenna housing section 7112. The fixed legs 7111 are formed so as to protrude upward from both ends of the lid body 7110 in the short direction. The two pairs of fixed legs 7111 have outward-protruding hooks 7113 at the tips (upper ends) of the two pairs of fixed legs 7111. The antenna housing section 7112 has a roughly flat rectangular box shape, protrudes downward from the bottom surface of the lid body 7110, and is formed integrally with the lid body 7110 so as to open at the top surface of the lid body 7110. A through-hole 7114 is formed at the longitudinal end of the antenna housing section 7112, penetrating the lid body 7110 in the thickness direction (vertical direction).

[0035] The body 710 and the cover 711 are joined together by hooking two pairs of fixing legs 7111 of the cover 711 into four hook holes 7102 of the body 710, one for each. In the circuit block 70, the second region 722 of the circuit board 72 is housed in the body 710, and the first region 721 (antenna 73) of the circuit board 72 is housed in the antenna housing portion 7112 (see FIG. 8). The through-hole 7114 of the cover 711 faces the light-receiving portion 740 of the light-receiving element 74 mounted on the second region 722 of the circuit board 72. In other words, an infrared signal transmitted from a setting device (not shown) is received (received) by the light-receiving element 74 through the through-hole 7114 of the second case 71 (cover 711).

[0036] (2-2-2-3) Support plate The support plate 62 is formed into a hook-shaped flat plate using a metal plate (see FIG. 5). However, the support plate 62 has multiple side pieces that are bent up. The power supply device 60 and the wireless communication device 7 are attached to the upper surface of the support plate 62 (see FIG. 5).

[0037] Here, an oval third through-hole 620 is provided in the support plate 62 at a position where the wireless communication device 7 is to be attached (see FIG. 8). That is, the wireless communication device 7 is attached to the support plate 62 with the antenna accommodating portion 7112 of the second case 71 inserted into the third through-hole 620 (see FIG. 8).

[0038] (2-2-3) Support member The support member 4 has a housing 40, a frame body 41, and two connecting plates 42 (see FIGS. 2, 3, and 5).

[0039] The housing 40 has a square, flat bottom plate 400 and four wall plates extending downward from the four edges of the bottom plate 400, forming a square box shape with an open bottom (see FIGS. 1 and 3). Five LED modules 3 are screwed to the bottom surface of the bottom plate 400 so as to be aligned in a row along the short side (see FIGS. 3 and 4). A support plate 62 is screwed to the top surface of the bottom plate 400 (see FIG. 5).

[0040] Here, a rectangular first through hole 402 is provided at a position facing the third through hole 620 provided in the support plate 62 in the thickness direction (vertical direction) of the bottom plate 400. In other words, when the support plate 62 is attached to the upper surface of the bottom plate 400, the antenna accommodating section 7112 inserted into the third through hole 620 of the support plate 62 is inserted into the first through hole 402 and protrudes downward from the lower surface of the bottom plate 400 (see FIG. 8).

[0041] The frame body 41 has a frame plate 410 formed in a square frame shape and four side plates 411 rising upward from the inner edge of the upper surface of the frame plate 410. The frame body 41 houses the housing 40 inside the four side plates 411. At this time, a panel 43 is sandwiched between the upper surface of the frame body 41 and the lower ends of the four wall plates of the housing 40. Then, connecting plates 42 are screwed to the centers in the left-right direction of the side plates 411 on both the front and rear sides of the frame body 41, thereby integrally connecting the housing 40 and the frame body 41 (see FIGS. 2 and 5). Note that each connecting plate 42 is formed by bending a rectangular metal plate into an L-shape along the longitudinal direction.

[0042] The panel 43 is formed in the shape of a square flat plate from a translucent synthetic resin, such as an acrylic resin or a polycarbonate resin mixed with a diffusing material (see FIGS. 2 and 3). That is, the light (illumination light) emitted from the five LED modules 3 attached to the bottom surface of the housing 40 (the lower surface of the bottom plate 400) is diffused as it passes through the panel 43 and is irradiated into the illumination space.

[0043] Here, two hook portions 44 are provided on each of the two front and rear side plates 411 of the frame body 41, to which the mounting springs 5, which will be described later, are attached (see FIG. 2).

[0044] (2-2-5) Mounting spring The mounting spring 5 has a coil portion 50, a pair of arm portions 51, and a mounting portion 52 (see FIG. 2). The coil portion 50, the pair of arm portions 51, and the mounting portion 52 are integrally formed from a metal wire.

[0045] The mounting springs 5 are attached to the support member 4 by hooking the mounting portions 52 onto the hook portions 44 provided on the support member 4 (see FIG. 2). However, the two mounting springs 5 attached to the front hook portions 44 of the support member 4 and the two mounting springs 5 attached to the rear hook portions 44 of the support member 4 have slightly different shapes of the pair of arms 51.

[0046] (3) Installation procedure for lighting fixtures according to the embodiment Next, the installation procedure for lighting fixture A1 will be described.

[0047] First, the worker inserts the fixture body 1 into the recessed hole in the ceiling material and inserts the hanging bolts into the bolt insertion holes 111 in the top plate 11. Then, the worker secures the fixture body 1 to the hanging bolts by tightening nuts on the hanging bolts that have been inserted into the bolt insertion holes 111 and protrude below the top plate 11. Then, the worker connects the power cable that has been pulled through the cable insertion hole 110 in the top plate 11 to the power terminal block 13, and also connects the signal line that has been pulled through the cable insertion hole 110 to the signal terminal block 14.

[0048] Next, the worker uses the two mounting springs 5 attached to the front of the support member 4 to hang the light source unit 2 from the fixture body 1. Specifically, the worker bends the pair of arms 51 of the two mounting springs 5 so that they approach each other, and hooks the tip of each arm 51 onto the two holding portions 103 at the front of the fixture body 1, one by one. As a result, the light source unit 2 is hung from the fixture body 1 by hooking the arms 51 of the two mounting springs 5 onto the holding portions 103 of the fixture body 1. This state is called a temporary hanging state.

[0049] In the temporarily suspended state, the worker electrically connects the power supply terminal block 13 and the power supply device 60 with a power line. After completing the wiring work, the worker hooks the tips of the pairs of arms 51 of the two mounting springs 5 attached to the rear of the support member 4 onto the two holding portions 103 at the rear of the fixture body 1, respectively. At this time, the light source unit 2 is suspended from the fixture body 1 by the four mounting springs 5, approximately parallel to the ceiling material.

[0050] The worker then pushes the light source unit 2 upward and inserts it into the fixture body 1 through the opening on the underside of the fixture body 1. At this time, as the light source unit 2 moves upward, the four mounting springs 5 spread in directions in which the arms 51 move away from each other due to the elastic force of the coil portions 50. When the worker then pushes the light source unit 2 upward to a position where the frame plate 410 of the light source unit 2 abuts against the ceiling material, the four mounting springs 5 are held by the four holding portions 103 of the fixture body 1, and the light source unit 2 can be attached to the fixture body 1 (see FIG. 1).

[0051] In this manner, the installation work for the lighting fixture A1 is completed.

[0052] (4) Features of the lighting fixture according to the embodiment In the lighting fixture A1, the antenna 73 (antenna housing 7112 of the second case 71) of the wireless communication device 7 is inserted through the third through-hole 620 of the support plate 62, the first through-hole 402 of the bottom plate 400, and the second through-hole 310 of the substrate 31. The tip portion (lower end portion) of the antenna 73 protrudes downward from the underside of the substrate 31 through the second through-hole 310 of the substrate 31 (see FIG. 8 ). In other words, the wireless communication device 7 is disposed on the upper surface of the bottom plate 400 so that the antenna 73 is electromagnetically exposed through the first through-hole 402 and the second through-hole 310. Therefore, a wireless signal (radio wave) transmitted from a transmitter is received by the antenna 73 after passing through the panel 43 made of an insulator (synthetic resin). Note that "electromagnetically exposed" means being in a state in which electromagnetic waves, including radio waves, can be received.

[0053] In the conventional example described in Patent Document 1, the opening through which the guide portion of the housing accommodating the antenna is inserted is provided in the light-emitting element support member so as to avoid the light-emitting element substrate. In contrast, in lighting fixture A1, first through-hole 402 through which antenna 73 is inserted is provided at a position overlapping with substrate 31 of LED module 3, and antenna 73 is electromagnetically exposed through second through-hole 310 provided in substrate 31.

[0054] Therefore, in the lighting device A1, the second through holes 310 provided in the bottom plate 400 can overlap with the substrate 31, so the spacing between the LED modules 3 can be narrower than when the second through holes are provided between the substrates 31 of adjacent LED modules 3. In other words, in the lighting device A1, the substrates 31 of the LED modules 3 can be made larger without changing the size of the bottom plate 400. As a result, the lighting device A1 can increase the light-emitting area (the area of the underside of the substrate 31) while enabling wireless communication.

[0055] Furthermore, in the lighting fixture A1, a part (tip portion) of the antenna 73 protrudes from the lower surface of the substrate 31 through the second through-hole 310 of the substrate 31, and therefore the reception sensitivity of the wireless communication device 7 can be improved.

[0056] Furthermore, in lighting device A1, first through hole 402 provided in bottom plate 400 made of a metal material is formed to be no smaller in size than second through hole 310 provided in substrate 31. In other words, first through hole 402 and second through hole 310 are formed so that the length in each of the vertical and horizontal directions of first through hole 402 is equal to or greater than the length in each of the major and minor axis directions of second through hole 310 (see FIG. 9).

[0057] Therefore, the larger the dimension of the first through hole 402, the greater the distance between the edge of the first through hole 402 in the bottom plate 400 and the antenna 73, making it easier for the antenna 73 to receive radio waves passing through the substrate 31 without being obstructed by the bottom plate 400. As a result, the lighting fixture A1 can further improve the reception sensitivity of the wireless communication device 7. The through hole 7114 in the second case 71 of the wireless communication device 7 faces the first through hole 402 in the bottom plate 400 and the second through hole 310 in the substrate 31 (see FIG. 9 ). In other words, the light receiving portion 740 of the light receiving element 74 of the wireless communication device 7 is disposed so as to face the first through hole 402 and the second through hole 310, making it less likely that the infrared signal will be blocked by the substrate 31 and the bottom plate 400, thereby improving the reliability of infrared communication. However, in lighting fixture A1, first through hole 402 may be larger than second through hole 310 as long as the receiving sensitivity of antenna 73 and the light receiving sensitivity of light receiving element 74 are sufficiently ensured.

[0058] The second through hole 310 is provided at a position on the surface of the substrate 31 where the LEDs 30 and the conductors 33 are not present. For example, the center of the substrate 31 in the short-side direction is provided with a plurality of screw insertion holes 311 for screwing the substrate 31 to the bottom plate 400, so the LEDs 30 and the conductors 33 are not present there. Therefore, by providing the second through hole 310 at the center of the substrate 31 in the short-side direction, the lighting device A1 can effectively utilize the dead space of the substrate 31 that occurs between the plurality of screw insertion holes 311. However, the position at which the second through hole 310 is provided is not limited to the center of the short-side direction on the surface of the substrate 31. For example, the second through hole 310 may be provided between the first and second rows or the third and fourth rows of four rows of LEDs 30 arranged along the short-side direction of the substrate 31.

[0059] Furthermore, the second through-hole 310 is provided at a position closer to the first end 31A than to the second end 31B in the longitudinal direction of the substrate 31 (see FIG. 6). That is, the substrate 31 is screwed to the bottom plate 400 with the first end 31A, on which the two terminal fittings 32 are mounted, oriented closer to the power supply device 60. Therefore, if the second through-hole 310 is provided at a position closer to the first end 31A than to the second end 31B, the wireless communication device 7 can be disposed closer to the power supply device 60. As a result, the length of the signal cable 700 of the wireless communication device 7 can be shortened.

[0060] The lighting fixture A1 includes a light source unit 2 having an LED module 3, a support member 4, a power supply device 60, and a wireless communication device 7, and a fixture body 1 to which the light source unit 2 is detachably attached. Therefore, the lighting fixture A1 can be attached to the fixture body 1 after the fixture body 1 is attached to a ceiling material (construction material), thereby improving the workability when attaching the lighting fixture A1 to a ceiling material.

[0061] (5) Modifications of the lighting fixture according to the embodiment Next, several modified examples of the lighting fixture according to the embodiment will be described. However, each of the modified examples described below is characterized by the wireless communication device 7. Therefore, in each modified example, components common to the embodiment will be assigned the same reference numerals, and explanations and illustrations thereof will be omitted as appropriate.

[0062] (5-1) Variation 1 10, the wireless communication device 7 in lighting fixture A1 of Modification 1 has two circuit boards 72A and 72B. One of the circuit boards, 72A, is provided with antenna 73, which was formed in first region 721 of circuit board 72 in the embodiment. The other circuit board, 72B, is provided with signal processing circuits and the like, which were formed in second region 722 of circuit board 72 in the embodiment. The two circuit boards 72A and 72B are electrically connected by wiring 723 consisting of two lead wires.

[0063] In addition, in the wireless communication device 7 in variant example 1, the second case 71 has a main body portion 712 in which the circuit board 72B is accommodated, an antenna accommodating portion 713 in which the circuit board 72A is accommodated, and a wiring accommodating portion 714 in which the wiring 723 is accommodated.

[0064] The main body 712 and the antenna housing 713 are each formed in a rectangular parallelepiped shape with a height shorter than its length and width. The wire housing 714 is formed in a cylindrical shape. The main body 712 is connected to one end (upper end) of the wire housing 714 in the axial direction (vertical direction), and the antenna housing 713 is connected to the other end (lower end) of the wire housing 714 in the axial direction (see FIG. 10).

[0065] The main body 712 is attached to the upper surface of the support plate 62. The wiring accommodating portion 714 is inserted through the third through-hole 620 of the support plate 62, the first through-hole 402 of the bottom plate 400, and the second through-hole 310 of the substrate 31. The antenna accommodating portion 713 is disposed below the substrate 31 (see FIG. 10).

[0066] Thus, wireless communication device 7 in Modification 1 has antenna housing portion 713 that houses antenna 73 entirely exposed below substrate 31, thereby further improving radio wave reception sensitivity. Moreover, lighting fixture A1 in Modification 1 has circuit board 72A on which antenna 73 is formed lying horizontally, thereby reducing the height that antenna 73 protrudes below substrate 31 and making it less likely that light emitted from LED 30 will be eclipsed.

[0067] (5-2) Variation 2 As shown in FIG. 11, the wireless communication device 7 in the lighting fixture A1 of the second modification is characterized in that the two circuit boards 72A and 72B of the wireless communication device 7 in the first modification are housed in a main body 712, and the antenna housing section 713 and the wiring housing section 714 are eliminated.

[0068] The two circuit boards 72A and 72B are housed in the main body 712 with the circuit board 72A on which the antenna 73 is formed on the bottom and the circuit board 72B on which the signal processing circuit and the like are formed on the top. The two circuit boards 72A and 72B are electrically connected by wiring 723.

[0069] The second case 71, consisting only of the main body 712, is attached to the upper surface of the support plate 62 so that the antenna 73 (circuit board 72A) faces the third through hole 620, the first through hole 402, and the second through hole 310 (see Figure 11).

[0070] Thus, in the wireless communication device 7 in Modification 2, the antenna 73 housed in the main body 712 made of synthetic resin is electromagnetically exposed below the substrate 31 through the third through hole 620, the first through hole 402, and the second through hole 310. In other words, a wireless signal (radio wave) transmitted from a transmitter passes through the second through hole 310 in the substrate 31, the first through hole 402 in the bottom plate 400, and the third through hole 620 in the support plate 62, and is received by the antenna 73.

[0071] In lighting device A1 of modification 2, antenna 73 does not protrude below substrate 31, so light emitted from LED 30 is less likely to be eclipsed.

[0072] (6) Summary A lighting fixture (A1) according to a first aspect of the present disclosure includes one or more light source modules (LED modules 3), a support member (4) that supports the light source modules, and a power supply device (60) that supplies power to the light source modules to illuminate them. The lighting fixture (A1) according to the first aspect also includes a wireless communication device (7) that receives wireless signals transmitted via electromagnetic waves. The light source module includes a substrate (31) and a plurality of light-emitting elements (LEDs 30) mounted on the surface of the substrate (31). The power supply device (60) is configured to adjust the power supplied to the light source module in response to the wireless signals received by the wireless communication device (7). The wireless communication device (7) includes an antenna (73) for receiving wireless signals transmitted via radio waves. The support member (4) includes a mounting plate (bottom plate 400) on a first surface of which the light source modules are attached and on a second surface opposite the first surface of which the wireless communication device (7) is disposed. The mounting plate has a first through-hole (402) formed in a position facing the antenna (73). The substrate 31 has a second through-hole 310 formed in a position facing the first through-hole 402. The wireless communication device 7 is disposed on the second surface of the mounting plate so that the antenna 73 is electromagnetically exposed through the first through-hole 402 and the second through-hole 310.

[0073] In the lighting fixture (A1) according to the first aspect, the first through hole (402) can be overlapped with the substrate (31), and therefore the substrate (31) of the light source module can be made larger without changing the size of the mounting plate compared to when the first through hole is not overlapped with the substrate (31). As a result, the lighting fixture (A1) according to the first aspect can increase the light-emitting area (the surface area of the substrate 31) while enabling wireless communication.

[0074] A lighting fixture (A1) according to a second aspect of the present disclosure can be realized in combination with the lighting fixture (A1) according to the first aspect. In the lighting fixture (A1) according to the second aspect, it is preferable that at least a portion of the antenna (73) of the wireless communication device (7) is inserted through the first through hole (402) and the second through hole (310).

[0075] The lighting fixture (A1) according to the second aspect can improve the reception sensitivity of the wireless communication device (7) by inserting at least a portion of the antenna (73) through the first through hole (402) and the second through hole (310).

[0076] A lighting device (A1) according to a third aspect of the present disclosure can be realized in combination with the lighting device (A1) according to the second aspect. In the lighting device (A1) according to the third aspect, it is preferable that at least a portion of the antenna (73) protrudes from the surface of the substrate (31) through the second through-hole (310).

[0077] The lighting fixture (A1) according to the third aspect can further improve the receiving sensitivity of the wireless communication device (7) by having at least a portion of the antenna (73) protrude from the surface of the substrate (31) through the second through-hole (310).

[0078] A lighting fixture (A1) according to a fourth aspect of the present disclosure can be realized by combining it with any of the first to third aspects. In the lighting fixture (A1) according to the fourth aspect, the mounting plate is preferably made of a metal material. The first through hole (402) is preferably not smaller than the second through hole (310).

[0079] In the lighting fixture (A1) according to the fourth aspect, the distance between the edge of the first through hole (402) and the antenna (73) is increased, so that radio waves passing through the substrate (31) can be more easily received by the antenna (73) without being obstructed by the mounting plate. As a result, the lighting fixture (A1) according to the fourth aspect can further improve the receiving sensitivity of the wireless communication device (7).

[0080] A lighting device (A1) according to a fifth aspect of the present disclosure can be realized in combination with the fourth aspect. In the lighting device (A1) according to the fifth aspect, the first through hole (402) is preferably larger than the second through hole (310).

[0081] The lighting fixture (A1) according to the fifth aspect can further improve the receiving sensitivity of the wireless communication device (7).

[0082] A lighting fixture (A1) according to a sixth aspect of the present disclosure can be realized by combining it with any of the first to fifth aspects. In the lighting fixture (A1) according to the sixth aspect, the wireless communication device (7) preferably has an infrared receiving unit (light receiving element 74) for receiving a wireless signal transmitted via infrared light. The infrared receiving unit is preferably disposed so as to face the first through-hole (402) in the mounting plate and the second through-hole (310) in the base plate (31).

[0083] In the lighting fixture (A1) according to the sixth aspect, the infrared receiving unit is arranged to face the first through-hole (402) of the mounting plate and the second through-hole (310) of the substrate (31), so that wireless signals transmitted via infrared rays are less likely to be blocked by the substrate (31) and the mounting plate. As a result, the lighting fixture (A1) according to the sixth aspect can improve the reliability of wireless communications transmitted via infrared rays.

[0084] A lighting device (A1) according to a seventh aspect of the present disclosure can be realized by combining it with any one of the first to sixth aspects. In the lighting device (A1) according to the seventh aspect, it is preferable that the plurality of light-emitting elements are electrically connected via a wiring conductor (33) formed on the surface of the substrate (31). It is preferable that the second through hole (310) is provided at a position on the surface of the substrate (31) where the plurality of light-emitting elements and the conductor (33) are not present.

[0085] In the lighting fixture (A1) according to the seventh aspect, a second through hole is provided on the surface of the substrate (31) at a position where multiple light-emitting elements and conductors (33) are not present, thereby making effective use of the dead space of the substrate (31).

[0086] An illumination device (A1) according to an eighth aspect of the present disclosure can be realized by combining it with the seventh aspect. In the illumination device (A1) according to the eighth aspect, the substrate (31) is preferably formed in the shape of a long, flat plate. The plurality of light-emitting elements are preferably mounted on the surface of the substrate (31) so as to be spaced apart along the longitudinal direction of the substrate (31). The conductor (33) is preferably formed so as to extend back and forth from a first longitudinal end (31A) of the substrate (31) to a second longitudinal end (31B) of the substrate (31). The second through-hole (310) is preferably provided at a position closer to the first longitudinal end (31A) than to the second longitudinal end (31B) of the substrate (31) in the longitudinal direction.

[0087] In the lighting fixture (A1) according to the eighth aspect, if the second through hole (310) is located closer to the first end (31A) than to the second end (31B), it is possible to arrange, for example, the wireless communication device (7) closer to the power supply device (60). As a result, the lighting fixture (A1) according to the eighth aspect can shorten the length of the wiring (signal cable 700) for connecting the wireless communication device (7) and the power supply device (60).

[0088] A lighting fixture (A1) according to a ninth aspect of the present disclosure can be realized by combining it with any of the first to eighth aspects. The lighting fixture (A1) according to the ninth aspect preferably includes a light source unit (2) having a light source module, a support member (4), a power supply device (60), and a wireless communication device (7), and a fixture body (1) to which the light source unit (2) is detachably attached.

[0089] In the lighting fixture (A1) according to the ninth aspect, the light source unit (2) is detachably attached to the fixture body (1), which improves workability when attaching the lighting fixture (A1) to a construction material such as a ceiling material. [Explanation of symbols]

[0090] A1 Lighting fixture 1. Device body 2 Light source unit 3 LED module (light source) 4 Support member 7. Wireless communication devices 30 LEDs (light-emitting elements) 31 PCB 60 Power supply 73 Antenna 74 Photodetector (infrared receiver) 310 Second through hole 311 Screw insertion hole 400 Bottom plate (mounting plate) 402 First through hole

Claims

1. a plurality of light source modules; a support member for supporting the plurality of light source modules; a power supply device that supplies power to the plurality of light source modules to light them up; a wireless communication device that receives a wireless signal using an electromagnetic wave as a medium; Equipped with Each of the plurality of light source modules includes a substrate formed in a flat plate shape and a plurality of light emitting elements mounted on a surface of the substrate, the power supply device is configured to adjust the power supplied to the plurality of light source modules in response to the wireless signal received by the wireless communication device; the wireless communication device has an antenna for receiving the wireless signal via radio waves; the support member has a first surface on which the light source modules are attached and a second surface on which the wireless communication device is disposed opposite to the first surface; The support member has a first through hole formed at a position facing the antenna, the substrate of one of the plurality of light source modules has a second through hole provided at a position opposite to the first through hole, and a portion where an attachment member for attaching the substrate to the support member is disposed; the second through hole and the portion are provided on the surface of the substrate of the one light source module at a position sandwiched between two adjacent rows of the plurality of light emitting elements mounted in a plurality of rows, the wireless communication device is disposed on the second surface of the support member so as to electromagnetically expose the antenna through the first through-hole and the second through-hole. Lighting fixtures.

2. The substrate is formed in a long, flat plate shape.

2. The lighting fixture of claim 1.

3. the substrate has a plurality of screw insertion holes through which screws for screwing the substrate to the support member are inserted; 3. The lighting fixture according to claim 2.

4. the plurality of screw insertion holes are arranged in a line with the second through holes along the longitudinal direction of the substrate; 4. The lighting fixture according to claim 3.

5. At least a part of the antenna of the wireless communication device is inserted through the first through hole and the second through hole. A lighting fixture according to any one of claims 1 to 3.

6. At least a portion of the antenna protrudes from the surface of the substrate of the one light source module through the second through hole.

6. The lighting fixture according to claim 5.

7. The support member is made of a metal material, the first through hole is not smaller than the second through hole; A lighting fixture according to any one of claims 1 to 6.

8. The first through hole is larger than the second through hole.

8. The lighting fixture of claim 7.

9. the wireless communication device has an infrared receiving unit for receiving the wireless signal using infrared rays as a medium; the infrared receiving unit is disposed to face the first through hole of the support member and the second through hole of the substrate of the one light source module; A lighting fixture according to any one of claims 1 to 8.

10. a light source unit including the plurality of light source modules, the support member, the power supply device, and the wireless communication device; a fixture body to which the light source unit is detachably attached; Equipped with A lighting fixture according to any one of claims 1 to 9.

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