Lighting fixture

Abstract

To achieve an increase of a light-emitting area while enabling wireless communication.SOLUTION: A lighting fixture includes: a plurality of LED modules 3; a support member supporting the LED modules 3; a power supply device supplying electric power to the LED modules 3 to turn on the modules; and a wireless communication device receiving wireless signals with electromagnetic waves as media. The LED modules 3 have: a substrate 31 formed in a flat plate shape; and a plurality of LEDs 30 mounted on the surface of the substrate 31. The support member is provided with a first through hole at a position facing an antenna. The substrate 31 includes: a second through hole 310 formed at a position facing the first through hole; and a portion (a screw insertion hole 311) where a fitting member for fitting the substrate 31 to the support member is arranged. The second through hole 310 and the screw insertion hole 311 are formed at positions between adjacent two rows of the plurality of LEDs 30 mounted in a plurality of rows on the surface of the substrate 31.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 Art

[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 a conventional example) includes a device body attached to a ceiling or the like, and a light emitting unit attached to the device body. The light emitting unit includes a light emitting element substrate on which a plurality of 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 includes an antenna, a wireless control circuit that controls the power supply unit according to a signal received by the antenna, and a housing that houses the antenna and the wireless control circuit inside. The housing is formed in an L shape in a 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 (guide portion) protrudes from the lower surface of the light emitting element support member through the opening. Note that an antenna is housed in the guide portion of the housing.

[0004] That is, the wireless module can receive radio waves of a wireless signal with an antenna that protrudes from the lower surface of the light emitting element support member without being blocked by the metal light emitting element support member. Note that the opening of the light emitting element support member is provided 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

Summary of the Invention

Problems to be Solved by the Invention

[0006] By the way, in the lighting device (lighting fixture) of the conventional example, an 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. Therefore, it has been 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 capable of expanding the light emitting area while enabling wireless communication.

Means for Solving the Problems

[0008] A lighting fixture according to an aspect of the present disclosure includes one or more light source modules, a support member that supports the light source modules, a power supply device that supplies power to the light source modules to cause them to light up, and a wireless communication device that receives a wireless signal using an electromagnetic wave as a medium. The light source module has a substrate formed in a flat plate shape and a plurality of light emitting elements mounted on the surface of the substrate. The power supply device is configured to adjust the power supplied to the light source module according to the wireless signal received by the wireless communication device. The wireless communication device has an antenna for receiving the wireless signal using radio waves as a medium. The support member has the light source module attached to a first surface, and the wireless communication device disposed on a second surface opposite to the first surface. The support member is provided with a first through hole at a position facing the antenna. The substrate has a second through hole provided at a position facing the first through hole, and a portion where a mounting member for attaching the substrate to the support member is disposed. The second through hole and the portion are provided at positions sandwiched between two adjacent rows among the plurality of light emitting elements arranged in a plurality of rows on the surface of the substrate. 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.

Advantages of the Invention

[0009] The lighting fixture of the present disclosure has the effect of being able to expand the light-emitting area while enabling wireless communication.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Embodiments for Carrying Out the Invention

[0011] The lighting fixture according to an embodiment of the present disclosure will be described in detail with reference to the drawings. However, each of the drawings described in the following embodiments is a schematic diagram, and the respective ratios of the sizes and thicknesses of the respective 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 can be made according to the design and the like as long as the effects of the present disclosure can be achieved.

[0012] (1) Outline of the lighting fixture according to the embodiment The lighting fixture A1 according to the embodiment includes one or more light source modules (LED module 3), a support member 4, a power supply device 60, and a wireless communication device 7. The support member 4 supports the LED module 3. The power supply device 60 supplies power to the LED module 3 to turn it on. The wireless communication device 7 receives a wireless signal using electromagnetic waves as a medium.

[0013] The LED module 3 has a substrate 31 and a plurality of light-emitting elements (LED 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 according to the wireless signal received by the wireless communication device 7.

[0014] The wireless communication device 7 has an antenna 73 for receiving a wireless signal using radio waves as a medium. The support member 4 has a mounting plate (bottom plate 400) with the LED module 3 attached to the first surface and the wireless communication device 7 disposed on the second surface opposite to the first surface. The bottom plate 400 is provided with a first through hole 402 at a position facing the antenna 73. The substrate 31 is provided with a second through hole 310 at a position facing the first through hole 402. The wireless communication device 7 is disposed on the second surface of the bottom plate 400 so as to electromagnetically expose the antenna 73 through the first through hole 402 and the second through hole 310.

[0015] Thus, the lighting fixture A1 according to the embodiment can dispose the wireless communication device 7 at a position where the antenna 73 and the substrate 31 of the LED module 3 overlap when viewed in the thickness direction of the mounting plate (bottom plate 400). As a result, the lighting fixture A1 according to the embodiment can increase the size of the substrate 31 compared to the conventional example, so that the light-emitting area (the area of the surface of the substrate 31 where the LED 30 is mounted) can be enlarged while enabling wireless communication.

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

[0017] (2-1) Fixture main body The fixture main body 1 is formed in a box shape having a square opening on the lower surface by joining a cylindrical body 10 formed in a rectangular tube shape and a top plate 11 formed in a rectangular flat plate shape (see FIG. 2). The top plate 11 is formed such that the length in the left-right direction is shorter than the length in the left-right direction of the cylindrical body 10. Therefore, a rectangular window hole 12 is opened at the left end on the upper surface of the fixture main 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-back direction. The pair of first side walls 101 and the pair of second side walls 102 are each formed in a long rectangular shape. However, stepped portions 104 extending over the entire length in the front-back direction are formed at the upper end portions of the pair of second side walls 102, respectively. Further, three holes are provided at equal intervals in the left-right direction in the stepped portion 104 of each second side wall 102. In the following description, the edges of the respective holes in the stepped 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. Then, the cylindrical body 10 is configured by joining both ends in the longitudinal direction (front end and rear end) of the pair of first side walls 101 and both ends in the longitudinal direction (left end and right end) of the pair of second side walls 102 by an appropriate method such as welding.

[0020] The top plate 11 is formed in a rectangular flat plate shape by a metal plate. A power terminal block 13 and a signal terminal 14 are attached to the lower surface of the top plate 11 (see Fig. 2). Further, two cable insertion holes 110 through which a power cable for power supply is inserted are provided at intervals in the center of the top plate 11. Furthermore, a plurality of bolt insertion holes 111 through which suspension bolts embedded in the ceiling structure of the building can be inserted are provided at intervals in the front-rear direction at the left end of the top plate 11.

[0021] The appliance main body 1 is inserted into the embedding hole of the ceiling material, and is fixed to a plurality of suspension bolts by tightening nuts on the suspension bolts inserted through the bolt insertion holes 111 of the top plate 11, and is embedded in the ceiling.

[0022] (2-2) Light source unit The light source unit 2 includes a plurality (five in the illustrated example) of LED modules 3, support members 4, four mounting springs 5, a power supply unit 6, etc. (see Figs. 1 - 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 a rectangular flat plate shape. The plurality of LEDs 30 are mounted on the lower surface (the first surface) of the substrate 31 at equal intervals along the longitudinal direction of the substrate 31 and in four rows along the short side direction of the substrate 31 (see Fig. 6).

[0024] The two terminal fittings 32 are mounted in the vicinity of the first end 31A in the longitudinal direction 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] On the lower surface of the substrate 31, a conductor 33 for electrically connecting a plurality of LEDs 30 and two terminal fittings 32 is formed (see FIG. 6). The conductor 33 is formed so as to reciprocate from the first end 31A to the second end 31B in the longitudinal direction of the substrate 31. However, in FIG. 6, the conductor 33 is represented by a thin straight line, but the shape and size of the conductor 33 are not limited to the illustrated shape and size.

[0026] At the center in the short side direction of the substrate 31, a plurality (three in the illustrated example) of screw insertion holes 311, one second through hole 310, and a plurality (two in the illustrated example) of positioning holes 312 are provided. 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 projection provided on a bottom plate 400 described later is inserted. These three screw insertion holes 311 and two positioning holes 312 are arranged in a row at intervals along the longitudinal direction of the substrate 31. Note that each screw insertion hole 311 is formed in an oval shape having the longitudinal direction of the substrate 31 as the major axis direction.

[0027] The second through hole 310 is provided at a position closer to the first end 31A than the second end 31B in the longitudinal direction of the substrate 31. The second through hole 310 is formed in an oval shape having the longitudinal direction of the substrate 31 as the major axis direction (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 into DC power through a power supply cable connected to a power supply terminal block 13 and supply it to the LED module 3. As shown in FIG. 5, the first case 600 is formed in a long box shape from 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, etc. 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 the first region 721, and the surface of the portion corresponding to the horizontal bar of the T shape is called the second region 722 (see FIG. 7). An antenna 73 composed of a microstrip antenna (also called a patch antenna) is formed in the first region 721. The antenna 73 is configured to be able to receive a wireless signal using radio waves in the 920 MHz band as a medium, for example.

[0031] In the second region 722, a signal processing circuit is formed that acquires control information from the 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 (lighting and extinguishing of the LED module 3) and increase or decrease the output of the power supply device 60 (dimming of the LED module 3).

[0032] Also, a light receiving element 74 that receives an infrared signal using infrared rays as a medium is mounted in the second region 722 (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 a plurality of lighting fixtures A1. When the signal processing circuit receives the setting information (initialization command), it initializes the identification information stored in the built-in memory of the microcontroller that constitutes the signal processing circuit, etc.

[0033] As shown in FIG. 7, the second case 71 includes a body 710 and a cover 711. The body 710 is formed of a box-shaped synthetic resin molded body with one side (lower surface) open. The body 710 is provided with an insertion groove 7100 through which a signal cable 700 is inserted in one of the two side walls facing each other in the short side direction. The body 710 also has two female screw portions 7101. Further, the body 710 is provided with a pair of hanging holes 7102 on the two side walls facing each other in the longitudinal direction so as to be arranged in the short side direction.

[0034] The cover 711 has a lid body 7110 approximately in the shape of a rectangular plate, two pairs of fixing legs 7111, and an antenna housing portion 7112. The fixing legs 7111 are formed to project upward from both ends along the short side direction of the lid body 7110. Note that hook claws 7113 projecting outward are provided at the tips (upper ends) of these two pairs of fixing legs 7111. The antenna housing portion 7112 is approximately in the shape of a flat rectangular box, projects downward from the lower surface of the lid body 7110, and is integrally formed with the lid body 7110 so as to open to the upper surface of the lid body 7110. Further, a through hole 7114 penetrating in the thickness direction (vertical direction) of the lid body 7110 is provided at the longitudinal end of the antenna housing portion 7112.

[0035] The body 710 and the cover 711 are coupled by hooking the two pairs of fixing legs 7111 of the cover 711 one by one to the four hanging holes 7102 of the body 710. The circuit block 70 is such that 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). Note that 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. That is, an infrared signal transmitted from a setter (not shown) is received (light 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 in a hook-shaped flat plate by a metal plate (see Fig. 5). However, a plurality of side pieces are bent on the support plate 62. 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, in the support plate 62, an oval third through hole 620 is provided at the position where the wireless communication device 7 is attached (see Fig. 8). That is, the wireless communication device 7 is attached to the support plate 62 with the antenna housing portion 7112 of the second case 71 inserted through the third through hole 620 (see Fig. 8).

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

[0039] The housing 40 has a bottom plate 400 formed in a square flat plate shape and four wall plates that stand downward from the four edges of the bottom plate 400, and is formed in a square box shape with an open lower surface (see Figs. 1 and 3). Five LED modules 3 are respectively screwed to the lower surface of the bottom plate 400 so as to be arranged in a row along the short side direction (see Figs. 3 and 4). Also, the support plate 62 is screwed to the upper surface of the bottom plate 400 (see Fig. 5).

[0040] Here, in the thickness direction (vertical direction) of the bottom plate 400, a rectangular first through hole 402 is provided at a position facing the third through hole 620 provided in the support plate 62. That is, when the support plate 62 is attached to the upper surface of the bottom plate 400, the antenna housing portion 7112 inserted through the third through hole 620 of the support plate 62 is inserted through 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 on 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, the 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, the 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, whereby the housing 40 and the frame body 41 are integrally connected (see FIGS. 2 and 5). 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 a square flat plate shape by a light - transmissive synthetic resin such as acrylic resin or polycarbonate resin mixed with a diffusing material (see FIGS. 2 and 3). That is, the light (lighting 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 when passing through the panel 43 and irradiates the lighting space.

[0043] Here, two hook portions 44 for attaching the mounting springs 5 described later are provided on each of the front and rear two side plates 411 of the frame body 41 (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 by a metal wire.

[0045] The mounting spring 5 is attached to the support member 4 by hooking the mounting portion 52 on the hook portion 44 provided on the support member 4 (see FIG. 2). However, the shapes of the pair of arm portions 51 of the two mounting springs 5 attached to the hook portion 44 in front of the support member 4 and the two mounting springs 5 attached to the hook portion 44 behind the support member 4 are slightly different.

[0046] (3) Construction Procedure of the Lighting Fixture According to the Embodiment Next, the installation procedure of the lighting fixture A1 will be described.

[0047] First, the operator inserts the fixture body 1 into the embedding hole of the ceiling material and inserts the suspension bolts through the bolt insertion holes 111 of the ceiling plate 11. Then, the operator tightens nuts on the suspension bolts inserted through the bolt insertion holes 111 and protruding below the ceiling plate 11 to fix the fixture body 1 to the plurality of suspension bolts. Then, the operator connects the power cable drawn from the cable insertion hole 110 of the ceiling plate 11 to the power terminal block 13, and also connects the signal line drawn from the cable insertion hole 110 to the signal terminal block 14.

[0048] Subsequently, the operator suspends the light source unit 2 from the fixture body 1 using two mounting springs 5 attached in front of the support member 4. Specifically, the operator bends a pair of arm portions 51 of the two mounting springs 5 toward each other and hooks the tip of each arm portion 51 onto two holding portions 103 in front of the fixture body 1 one by one. As a result, the light source unit 2 is suspended from the fixture body 1 by the respective arm portions 51 of the two mounting springs 5 being hooked onto the holding portions 103 of the fixture body 1. Note that this state is called a temporary suspension state.

[0049] In the temporary suspension state, the operator electrically connects the power terminal block 13 and the power supply device 60 with a power cable. After the operator completes the wiring work, the operator hooks the tips of a pair of arm portions 51 of the two mounting springs 5 attached behind the support member 4 onto two holding portions 103 behind the fixture body 1 one by one. At this time, the light source unit 2 is suspended from the fixture body 1 by the four mounting springs 5 in a state substantially parallel to the ceiling material.

[0050] Then, the operator pushes the light source unit 2 upward and inserts the light source unit 2 into the appliance body 1 through the opening on the lower surface of the appliance body 1. At this time, when the light source unit 2 moves upward, the four mounting springs 5 expand in a direction in which the respective arm portions 51 move away from each other due to the elastic force of the coil portion 50. Then, when the operator pushes the light source unit 2 until the frame plate 410 of the light source unit 2 hits the ceiling material, the four mounting springs 5 are held by the four holding portions 103 of the appliance body 1, and the light source unit 2 can be attached to the appliance body 1 (see FIG. 1).

[0051] The installation work of the lighting fixture A1 is completed as described above.

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

[0053] Here, 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. On the other hand, in the lighting fixture A1, the first through hole 402 through which the antenna 73 is inserted is provided at a position overlapping the substrate 31 of the LED module 3, and the antenna 73 is electromagnetically exposed through the second through hole 310 provided in the substrate 31.

[0054] Therefore, since the lighting fixture A1 can overlap the second through-hole 310 provided in the bottom plate 400 with the substrate 31, the interval between the LED modules 3 can be narrowed compared to the case where the second through-holes are provided between the substrates 31 of the adjacent LED modules 3. In other words, the lighting fixture A1 can enlarge the substrate 31 of the LED module 3 without changing the size of the bottom plate 400. As a result, the lighting fixture A1 can expand the light-emitting area (the area of the lower surface of the substrate 31) while enabling wireless communication.

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

[0056] Furthermore, the lighting fixture A1 is formed such that the first through-hole 402 provided in the bottom plate 400 made of a metal material is not smaller than the second through-hole 310 provided in the substrate 31. That is, the first through-hole 402 and the second through-hole 310 are formed such that the lengths in the vertical and horizontal directions of the first through-hole 402 are each equal to or greater than the lengths in the major-axis direction and minor-axis direction of the second through-hole 310 (see Fig. 9).

[0057] Thus, the larger the size of the first through-hole 402 is, the greater the distance between the edge of the first through-hole 402 of the bottom plate 400 and the antenna 73 becomes, and the radio waves passing through the substrate 31 are less blocked by the bottom plate 400 and are more easily received by the antenna 73. As a result, the lighting fixture A1 can further improve the reception sensitivity of the wireless communication device 7. Note that the through-hole 7114 of the second case 71 of the wireless communication device 7 faces the first through-hole 402 of the bottom plate 400 and the second through-hole 310 of the substrate 31 (see FIG. 9). That is, since the light-receiving portion 740 of the light-receiving element 74 of the wireless communication device 7 is arranged to face the first through-hole 402 and the second through-hole 310, the infrared signal is less likely to be blocked by the substrate 31 and the bottom plate 400, and the reliability of infrared communication can be improved. However, in the lighting fixture A1, if the reception sensitivity of the antenna 73 and the light-receiving sensitivity of the light-receiving element 74 can be sufficiently ensured, the first through-hole 402 may be larger than the second through-hole 310.

[0058] Also, the second through-hole 310 is provided at a position on the surface of the substrate 31 where a plurality of LEDs 30 and conductors 33 do not exist. For example, a plurality of screw insertion holes 311 are provided at the center in the short side direction of the substrate 31 to screw the substrate 31 to the bottom plate 400, so there are no LEDs 30 and conductors 33. Therefore, the lighting fixture A1 can effectively utilize the dead space of the substrate 31 generated between the plurality of screw insertion holes 311 by providing the second through-hole 310 at the center in the short side direction of the substrate 31. However, the position where the second through-hole 310 is provided is not limited to the center in the short side direction on the surface of the substrate 31. For example, the second through-hole 310 may be provided between the first row and the second row or the third row and the fourth row of the LEDs 30 arranged in four rows 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 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 in a direction in which the first end 31A where the two terminal fittings 32 are mounted is 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 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] Note that 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, after the fixture body 1 is attached to the ceiling material (construction material), the light source unit 2 can be attached to the fixture body 1, so that the workability when attaching to the ceiling material can be improved.

[0061] (5) Modifications of the lighting fixture according to the embodiment Next, several modifications of the lighting fixture according to the embodiment will be described. However, each of the modifications described below is characterized by the wireless communication device 7. Therefore, in each modification, the same reference numerals are given to the components common to the embodiment, and the description and illustration are appropriately omitted.

[0062] (5-1) Modification 1 As shown in FIG. 10, the wireless communication device 7 in the lighting fixture A1 of Modification 1 has two circuit boards 72A and 72B. An antenna 73 formed in the first region 721 of the circuit board 72 in the embodiment is formed on one circuit board 72A. A signal processing circuit and the like formed in the second region 722 of the circuit board 72 in the embodiment are formed on the other circuit board 72B. The two circuit boards 72A and 72B are electrically connected by a wiring 723 composed of two lead wires.

[0063] In addition, in the wireless communication device 7 in Modification 1, the second case 71 includes a main body portion 712 that houses the circuit board 72B, an antenna housing portion 713 that houses the circuit board 72A, and a wiring housing portion 714 that houses the wiring 723.

[0064] The main body portion 712 and the antenna housing portion 713 are each formed in a rectangular parallelepiped shape with a height lower than the longitudinal and lateral lengths. The wiring housing portion 714 is formed in a cylindrical shape. The main body portion 712 is coupled to one end (upper end) in the axial direction (vertical direction) of the wiring housing portion 714, and the antenna housing portion 713 is coupled to the other end (lower end) in the axial direction of the wiring housing portion 714 (see FIG. 10).

[0065] The main body portion 712 is attached to the upper surface of the support plate 62. The wiring housing portion 714 is inserted into 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. And the antenna housing portion 713 is disposed under the substrate 31 (see FIG. 10).

[0066] Thus, in the wireless communication device 7 in Modification 1, since the entire antenna housing portion 713 that houses the antenna 73 is exposed under the substrate 31, the reception sensitivity of radio waves can be further improved. Moreover, in the lighting fixture A1 of Modification 1, since the circuit board 72A on which the antenna 73 is formed is laid horizontally, the height at which the antenna 73 protrudes under the substrate 31 can be reduced, making it difficult for the light emitted from the LED 30 to be blocked.

[0067] (5-2) Modification 2 As shown in FIG. 11, the wireless communication device 7 in the lighting fixture A1 of Modification 2 is characterized in that the two circuit boards 72A and 72B of the wireless communication device 7 in Modification 1 are housed in the main body portion 712, and the antenna housing portion 713 and the wiring housing portion 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 at the bottom and the circuit board 72B on which a signal processing circuit or the like is formed at the top. Note that the two circuit boards 72A and 72B are electrically connected by the 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) is placed in the third through hole 620, the first through hole 402, and the second through hole 310 (see FIG. 11).

[0070] Thus, in the wireless communication device 7 according to the second modification, the antenna 73 housed in the synthetic resin main body 712 is electromagnetically exposed under the substrate 31 through the third through hole 620, the first through hole 402, and the second through hole 310. That is, the radio signal (radio wave) transmitted from the transmitter passes through the second through hole 310 of the substrate 31, the first through hole 402 of the bottom plate 400, and the third through hole 620 of the support plate 62 and is received by the antenna 73.

[0071] In the lighting fixture A1 according to the second modification, since the antenna 73 does not protrude under the substrate 31, the light emitted from the LED 30 can be made less likely to be blocked.

[0072] (6) Summary The lighting fixture (A1) according to the first aspect of the present disclosure includes one or more light source modules (LED module 3), a support member (4) that supports the light source module, and a power supply device (60) that supplies power to the light source module to cause it to emit light. The lighting fixture (A1) according to the first aspect includes a wireless communication device (7) that receives a wireless signal using an electromagnetic wave as a medium. The light source module has a substrate (31) and a plurality of light emitting elements (LED 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 according to the wireless signal received by the wireless communication device (7). The wireless communication device (7) has an antenna (73) for receiving a wireless signal using a radio wave as a medium. The support member (4) has a mounting plate (bottom plate 400) on which the light source module is attached to the first surface and the wireless communication device (7) is disposed on the second surface opposite to the first surface. The mounting plate is provided with a first through hole (402) at a position facing the antenna (73). The substrate (31) is provided with a second through hole (310) at a position facing the first through hole (402). The wireless communication device (7) is disposed on the second surface of the mounting plate so as to electromagnetically expose the antenna (73) through the first through hole (402) and the second through hole (310).

[0073] In the lighting fixture (A1) according to the first aspect, since the first through hole (402) can be overlapped with the substrate (31), the substrate (31) of the light source module can be enlarged without changing the size of the mounting plate as compared with the case where the first through hole is not overlapped with the substrate (31). As a result, the lighting fixture (A1) according to the first aspect can expand the light emitting area (the area of the surface of the substrate 31) while enabling wireless communication.

[0074] The lighting fixture (A1) according to the second aspect of the present disclosure can be realized by a combination with the first aspect. In the lighting fixture (A1) according to the second aspect, it is preferable that at least a part 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 part of the antenna (73) into the first through-hole (402) and the second through-hole (310).

[0076] The lighting fixture (A1) according to the third aspect of the present disclosure can be realized by combination with the second aspect. In the lighting fixture (A1) according to the third aspect, it is preferable that at least a part 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 reception sensitivity of the wireless communication device (7) by protruding at least a part of the antenna (73) from the surface of the substrate (31) through the second through-hole (310).

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

[0079] The lighting fixture (A1) according to the fourth aspect increases the distance between the edge of the first through-hole (402) and the antenna (73), so that the radio wave transmitted through the substrate (31) can be easily received by the antenna (73) without being blocked by the mounting plate. As a result, the lighting fixture (A1) according to the fourth aspect can further improve the reception sensitivity of the wireless communication device (7).

[0080] The lighting fixture (A1) according to the fifth aspect of the present disclosure can be realized by combination with the fourth aspect. In the lighting fixture (A1) according to the fifth aspect, it is preferable that the first through-hole (402) is larger than the second through-hole (310).

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

[0082] The lighting fixture (A1) according to the sixth aspect of the present disclosure can be realized by a combination with any of the first to fifth aspects. In the lighting fixture (A1) according to the sixth aspect, it is preferable that the wireless communication device (7) has an infrared light receiving unit (light receiving element 74) for receiving a wireless signal using infrared rays as a medium. The infrared light receiving unit is preferably arranged so as to face the first through hole (402) of the mounting plate and the second through hole (310) of the substrate (31).

[0083] In the lighting fixture (A1) according to the sixth aspect, since the infrared light receiving unit is arranged so as to face the first through hole (402) of the mounting plate and the second through hole (310) of the substrate (31), a wireless signal using infrared rays as a medium is 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 communication using infrared rays as a medium.

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

[0085] In the lighting fixture (A1) according to the seventh aspect, since the second through hole is provided at a position on the surface of the substrate (31) where the plurality of light emitting elements and the conductor (33) do not exist, the dead space of the substrate (31) can be effectively utilized.

[0086] The lighting fixture (A1) according to the eighth aspect of the present disclosure can be realized by combination with the seventh aspect. In the lighting fixture (A1) according to the eighth aspect, the substrate (31) is preferably formed in a long and flat plate shape. The plurality of light-emitting elements are preferably mounted on the surface of the substrate (31) so as to be arranged at intervals along the longitudinal direction of the substrate (31). The conductor (33) is preferably formed so as to reciprocate from the first end (31A) in the longitudinal direction of the substrate (31) to the second end (31B) in the longitudinal direction. The second through hole (310) is preferably provided at a position closer to the first end (31A) than the second end (31B) in the longitudinal direction of the substrate (31).

[0087] In the lighting fixture (A1) according to the eighth aspect, if the second through hole (310) is provided at a position closer to the first end (31A) than the second end (31B), for example, the wireless communication device (7) can be arranged close 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] The lighting fixture (A1) according to the ninth aspect of the present disclosure can be realized by combination with any one of the first to eighth aspects. The lighting fixture (A1) according to the ninth aspect preferably includes a light source module, a support member (4), a power supply device (60), a light source unit (2) having 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, since the light source unit (2) is detachably attached to the fixture body (1), the workability when attaching to a building material such as a ceiling material can be improved.

Explanation of Signs

[0090] A1 Lighting fixture 1 Fixture body 2 Light source unit 3 LED module (light source) 4 Support member 7 Wireless communication device 30 LED (light-emitting element) 31 Substrate 60 Power supply device 73 Antenna 74 Light-receiving element (infrared light-receiving section) 310 Second through-hole 311 Screw insertion hole 400 Bottom plate (mounting plate) 402 First through-hole

Claims

1. One or more light source modules, a support member for supporting the light source module, a power supply device for supplying power to the light source module to turn it on, a wireless communication device for receiving a wireless signal using an electromagnetic wave as a medium, comprising: the light source module having a substrate formed in a flat plate shape and a plurality of light emitting elements mounted on the surface of the substrate, the power supply device being configured to adjust the power supplied to the light source module according to the wireless signal received by the wireless communication device, the wireless communication device having an antenna for receiving the wireless signal using radio waves as a medium, the support member having the light source module attached to a first surface and the wireless communication device disposed on a second surface opposite to the first surface, the support member having a first through hole provided at a position facing the antenna, the substrate having a second through hole provided at a position facing the first through hole and a portion where a mounting member for attaching the substrate to the support member is disposed, the second through hole and the portion being provided at a position sandwiched between two adjacent rows among the plurality of light emitting elements mounted side by side in a plurality of rows on the surface of the substrate, the wireless communication device being 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, a lighting fixture.

2. The substrate is formed in a long flat plate shape. The lighting fixture according to 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. The lighting fixture according to Claim 2.

4. The plurality of screw insertion holes are provided so as to be arranged in a row with the second through hole along the longitudinal direction of the substrate. The lighting fixture according to Claim 3.

5. The wireless communication device inserts at least a part of the antenna through the first through hole and the second through hole. The lighting fixture according to any one of Claims 1 to 3.

6. At least a part of the antenna protrudes from the surface of the substrate through the second through hole. The lighting fixture according to Claim 5.

7. The support member is formed of a metal material. The first through hole is not smaller than the second through hole. The lighting fixture according to any one of Claims 1 to 6.

8. The first through hole is larger than the second through hole. The lighting fixture according to Claim 7.

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

10. A light source unit including the light source module, the support member, the power supply device, and the wireless communication device; An appliance body to which the light source unit is detachably attached; Comprising: The lighting fixture according to any one of claims 1 to 9.

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