Lighting fixtures and light source units

Abstract

To improve light receiving sensitivity.SOLUTION: A luminaire A1 comprises a supporting member 3, a light source module 1, a light receiving part 40, and a case 43. The supporting member 3 comprises a first surface 30A, and a second surface 30B opposite to the first surface 30A. The light source module 1 is supported by the supporting member 3 on the side of the first surface 30A. The light receiving part 40 is arranged on the side of the second surface 30B of the supporting member 3. The case 43 houses the light receiving part 40. The supporting member 3 comprises a through hole 32 penetrating from the first surface 30A to the second surface 30B. The light receiving part 40 is opposed to the through hole 32. At least a portion of the case 43 can transmit electromagnetic waves to be received by the light receiving part 40.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a lighting fixture and a light source unit, and more particularly to a remotely controllable lighting fixture and a light source unit included in the lighting fixture.

Background Art

[0002] As a conventional example, the light source unit and the lighting fixture described in Patent Document 1 will be exemplified. The lighting fixture described in Patent Document 1 includes a light source unit and an appliance body that detachably holds the light source unit. The light source unit includes a light source module, a lighting device that controls the power supplied to the light source module, a light receiving element unit that receives a remote control signal (infrared signal) and controls the lighting device, a support plate that supports the light source module, and a cover that is attached to the support plate so as to cover the light source module.

[0003] The light receiving element unit includes a light receiving element having a light receiving portion for receiving infrared rays, a circuit board on which the light receiving element is mounted, and a case that houses the circuit board. The case has a first opening that exposes the light receiving portion of the light receiving element from the case.

[0004] The support plate is made of a metal plate, the light source module is provided on the first surface side, and the light receiving element unit is provided on the second surface side opposite to the first surface. The support plate has a second opening formed in a portion where the light source module is not provided. The second opening is circular or elliptical such that at least a part thereof overlaps the first opening when viewed in a direction perpendicular to the first surface. That is, the light receiving element receives an infrared signal through the first opening and the second opening.

[0005] The cover has a support portion that extends along the first surface of the support plate. The cover is fixed to the support plate so as to cover the light source module. The second opening of the support plate is blocked by the support portion of the cover. Thereby, entry of foreign matter into the space on the second surface side of the support plate from the second opening is prevented.

Prior Art Documents

Patent Documents

[0006] [Patent Document 1] Japanese Patent Publication No. 2021-82520 [Overview of the Initiative] [Problems that the invention aims to solve]

[0007] However, in the conventional example described in Patent Document 1, the infrared signal received by the light-receiving unit must pass through two components: the cover and the support. Therefore, it was difficult to improve the light-receiving sensitivity of the infrared signal in the light-receiving element.

[0008] The purpose of this disclosure is to provide a lighting fixture and light source unit that can improve light reception sensitivity. [Means for solving the problem]

[0009] A lighting fixture according to one aspect of the present disclosure comprises a support member, a light source, a light receiving unit, and a case. The support member has a first surface and a second surface opposite to the first surface. The light source is supported by the support member on the side of the first surface. The light receiving unit is positioned on the side of the second surface of the support member. The case houses the light receiving unit. The support member has a through hole that penetrates from the first surface to the second surface. The light receiving unit faces the through hole. At least a portion of the case is permeable to electromagnetic waves received by the light receiving unit. The light source comprises one or more light-emitting elements and a substrate on which the light-emitting elements are mounted. The support member has a portion of the cut-out hole, which is formed after the claws for supporting the substrate have been cut and bent, as the through hole.

[0010] A light source unit according to one aspect of the present disclosure is used in a lighting fixture. The light source unit comprises the support member, the light source, and the light receiving unit. The light source unit is detachably attached to a fixture body which is attached to a building material. [Effects of the Invention]

[0011] The lighting fixture and light source unit of this disclosure have the effect of improving light reception sensitivity. [Brief explanation of the drawing]

[0012] [Figure 1] Figure 1 is a schematic diagram of a lighting fixture according to an embodiment of the present disclosure. [Figure 2] Figure 2 is a perspective view of the same lighting fixture. [Figure 3] Figure 3 is an exploded perspective view of the same lighting fixture. [Figure 4] Figure 4 is a circuit block diagram of the light source unit in the same lighting fixture. [Figure 5] Figure 5 is a partially broken perspective view of the infrared module in the same lighting fixture. [Figure 6] Figure 6 is a cross-sectional view of the main part of the light source unit shown above. [Figure 7] Figure 7 is a side view of the same lighting fixture, with some parts of the light source module, support member, and cover omitted. [Figure 8] Figure 8 is a partially broken perspective view of the infrared module in the same lighting fixture. [Figure 9] Figure 9 is an explanatory diagram illustrating the installation status of the lighting fixtures mentioned above. [Figure 10] Figure 10A is a cross-sectional view of the main parts of the light source module, support member, and infrared module in Modification 1 of the above lighting fixture. Figure 10B is a longitudinal cross-sectional view of the main parts of the light source module, support member, and infrared module in Modification 1 of the above lighting fixture. [Figure 11] Figure 11A is a longitudinal cross-sectional view of the main parts of the support member, power supply unit, and insulating member in Modification 2 of the same lighting fixture. Figure 11B is a longitudinal cross-sectional view of the main parts of another configuration of the support member, power supply unit, and insulating member in Modification 2 of the same lighting fixture. [Figure 12]Figure 12A is a cross-sectional view of the main parts of the support member, power supply unit, and insulating member in Modification 2 of the above lighting fixture. Figure 12B is a cross-sectional view of the main parts of another configuration of the support member, power supply unit, and insulating member in Modification 2 of the above lighting fixture. Figure 12C is a cross-sectional view of the main parts of yet another configuration of the support member, power supply unit, and insulating member in Modification 2 of the above lighting fixture. Figure 12D is a cross-sectional view of the main parts of yet yet another configuration of the support member, power supply unit, and insulating member in Modification 2 of the above lighting fixture. [Figure 13] Figure 13A is a cross-sectional view of the main parts of the light source module, support member, and infrared module in the modified example 3 of the same lighting fixture. Figure 13B is a longitudinal cross-sectional view of the main parts of the light source module, support member, power supply unit, and infrared module in the modified example 3 of the same lighting fixture. [Figure 14] Figure 14A is a cross-sectional view of the main parts of the light source module, support member, and infrared module in Modification 3 of the same lighting fixture. Figure 14B is a cross-sectional view of the main parts of another configuration of the light source module, support member, and infrared module in Modification 3 of the same lighting fixture. [Figure 15] Figure 15A is a cross-sectional view of the main parts of the light source module, support member, and infrared module in Modification 3 of the same lighting fixture. Figure 15B is a cross-sectional view of the main parts of another configuration of the light source module, support member, and infrared module in Modification 3 of the same lighting fixture. [Figure 16] Figure 16 is a cross-sectional view of the main parts of the light source module, support member, and infrared module in modified example 3 of the same lighting fixture. [Figure 17] Figure 17A is a partially omitted side view of the light source module, support member, and cover in Modification 4 of the above lighting fixture. Figure 17B is a partially omitted side view of another configuration of the light source module, support member, and cover in Modification 4 of the above lighting fixture. Figure 17C is a partially omitted side view of yet another configuration of the light source module, support member, and cover in Modification 4 of the above lighting fixture. Figure 17D is a partially omitted side view of yet another configuration of the light source module, support member, and cover in Modification 4 of the above lighting fixture. [Figure 18] FIG. 18 is a side view of another configuration of the light source module, the support member, and the cover in the fourth modification of the lighting fixture described above. [Figure 19] FIG. 19 is a side view of the light source module, the support member, and the cover in the fifth modification of the lighting fixture described above. [Figure 20] FIG. 20 is a cross-sectional view with a partial omission of the light source module, the support member, and the cover in the sixth modification of the lighting fixture described above. [Figure 21] FIG. 21 is a cross-sectional view with a partial omission of another configuration of the light source module, the support member, and the cover in the sixth modification of the lighting fixture described above. [Figure 22] FIG. 22 is a cross-sectional view with a partial omission of yet another configuration of the light source module, the support member, and the cover in the sixth modification of the lighting fixture described above. [Figure 23] FIG. 23A is a cross-sectional view with a partial omission of the light source module, the support member, and the cover in the seventh modification of the lighting fixture described above. FIG. 23B is a cross-sectional view with a partial omission of another configuration of the light source module, the support member, and the cover in the seventh modification of the lighting fixture described above. FIG. 23C is a cross-sectional view with a partial omission of yet another configuration of the light source module, the support member, and the cover in the seventh modification of the lighting fixture described above. FIG. 23D is a cross-sectional view with a partial omission of still another configuration of the light source module, the support member, and the cover in the seventh modification of the lighting fixture described above. [Figure 24] FIG. 24A is a cross-sectional view with a partial omission of another configuration of the light source module and the support member in the seventh modification of the lighting fixture described above. FIG. 24B is a cross-sectional view with a partial omission of yet another configuration of the light source module and the support member in the seventh modification of the lighting fixture described above. [Figure 25] FIG. 25 is a cross-sectional view with a partial omission of the light source module, the support member, and the fixture body in the eighth modification of the lighting fixture described above. [Figure 26]Figure 26A is a cross-sectional view of the main part of the support member in the modified example 9 of the same lighting fixture. Figure 26B is a cross-sectional view of the main part of another configuration of the support member in the modified example 9 of the same lighting fixture. Figure 26C is a cross-sectional view of yet another configuration of the support member in the modified example 9 of the same lighting fixture. [Figure 27] Figure 27A is a cross-sectional view of the main part of the support member in the modified example 9 of the same lighting fixture. Figure 27B is a cross-sectional view of the main part of another configuration of the support member in the modified example 9 of the same lighting fixture. Figure 27C is a cross-sectional view of yet another configuration of the support member in the modified example 9 of the same lighting fixture. Figure 27D is a cross-sectional view of yet another configuration of the support member in the modified example 9 of the same lighting fixture. [Figure 28] Figure 28A is a cross-sectional view of the main part of the support member in the modified example 9 of the same lighting fixture. Figure 28B is a cross-sectional view of the main part of another configuration of the support member in the modified example 9 of the same lighting fixture. Figure 28C is a cross-sectional view of yet another configuration of the support member in the modified example 9 of the same lighting fixture. [Figure 29] Figure 29A is a cross-sectional view of the main part of the support member in modified example 9 of the same lighting fixture. Figure 29B is a cross-sectional view of the main part of another configuration of the support member in modified example 9 of the same lighting fixture. [Figure 30] Figure 30A is a cross-sectional view of the main part of the support member in the modified example 9 of the same lighting fixture. Figure 30B is a cross-sectional view of the main part of another configuration of the support member in the modified example 9 of the same lighting fixture. Figure 30C is a cross-sectional view of yet another configuration of the support member in the modified example 9 of the same lighting fixture. [Figure 31] Figure 31A is a cross-sectional view of the main part of the support member in the modified example 9 of the same lighting fixture. Figure 31B is a cross-sectional view of the main part of another configuration of the support member in the modified example 9 of the same lighting fixture. Figure 31C is a cross-sectional view of yet another configuration of the support member in the modified example 9 of the same lighting fixture. Figure 31D is a cross-sectional view of yet another configuration of the support member in the modified example 9 of the same lighting fixture. [Figure 32]Figure 32A is a cross-sectional view of the main parts of the light source module and support member in modified example 9 of the same lighting fixture. Figure 32B is a cross-sectional view of the main parts of another configuration of the light source module and support member in modified example 9 of the same lighting fixture. [Figure 33] Figure 33 is a front view of modification 10 of the same lighting fixture. [Figure 34] Figure 34A is a cross-sectional view of the main parts of the light source module, support member, and cover in the modified example 10 of the same lighting fixture. Figure 34B is a cross-sectional view of the main parts of another configuration of the light source module, support member, and cover in the modified example 10 of the same lighting fixture. Figure 34C is a cross-sectional view of yet another configuration of the main parts of the light source module, support member, and cover in the modified example 10 of the same lighting fixture. [Figure 35] Figure 35 is a cross-sectional view of the main part of modified example 11 of the same lighting fixture. [Figure 36] Figure 36 is a cross-sectional view of the main part of the light source unit in modified example 12 of the same lighting fixture. [Figure 37] Figure 37 is a cross-sectional view of a key part of another configuration of the light source unit in modified example 12 of the same lighting fixture. [Figure 38] Figure 38A is a cross-sectional view of a key part of yet another configuration of the light source unit in the modified 12 of the same lighting fixture. Figure 38B is a cross-sectional view of a key part of yet another configuration of the light source unit in the modified 12 of the same lighting fixture. [Figure 39] Figure 39 is a cross-sectional view of a key part of another configuration of the light source unit in modified example 12 of the same lighting fixture. [Figure 40] Figure 40A is a cross-sectional view of the main parts of the substrate and support member in the modified example 12 of the lighting fixture described above. Figure 40B is a cross-sectional view of the main parts of another configuration of the substrate and support member in the modified example 12 of the lighting fixture described above. Figure 40C is a cross-sectional view of the main parts of yet another configuration of the substrate and support member in the modified example 12 of the lighting fixture described above. Figure 40D is a cross-sectional view of yet another configuration of the substrate and support member in the modified example 12 of the lighting fixture described above. [Figure 41]Figure 41A is a cross-sectional view of the main parts of the substrate and support member in modified example 12 of the same lighting fixture. Figure 41B is a cross-sectional view of the main parts of another configuration of the substrate and support member in modified example 12 of the same lighting fixture. Figure 41C is a cross-sectional view of the main parts of the support member and case in modified example 12 of the same lighting fixture. Figure 41D is a cross-sectional view of the main parts of another configuration of the support member and case in modified example 12 of the same lighting fixture. [Figure 42] Figure 42A is a cross-sectional perspective view of the main parts of the support member and components in the modified example 13 of the lighting fixture described above. Figure 42B is a cross-sectional perspective view of the main parts of another configuration of the support member and components in the modified example 13 of the lighting fixture described above. Figure 42C is a cross-sectional view of the main parts of yet another configuration of the support member and components in the modified example 13 of the lighting fixture described above. Figure 42D is a cross-sectional view of the main parts of yet yet another configuration of the support member and components in the modified example 13 of the lighting fixture described above. [Figure 43] Figure 43 is a cross-sectional view of the main part of the substrate in modified example 14 of the same lighting fixture. [Figure 44] Figure 44A is a plan view of the main parts of the support member and light receiving section in the modified example 15 of the above lighting fixture. Figure 44B is a plan view of the main parts of another configuration of the support member and light receiving section in the modified example 15 of the above lighting fixture. Figure 44C is a plan view of the main parts of yet another configuration of the support member and light receiving section in the modified example 15 of the above lighting fixture. Figure 44D is a plan view of the main parts of yet yet another configuration of the support member and light receiving section in the modified example 15 of the above lighting fixture. [Figure 45] Figure 45A is a plan view of the main parts of the support member and light receiving section in the modified example 15 of the same lighting fixture. Figure 45B is a plan view of another configuration of the main parts of the support member and light receiving section in the modified example 15 of the same lighting fixture. [Figure 46] Figure 46A is a plan view of the main components of the substrate, support member, and light-receiving part in modified example 16 of the same lighting fixture. Figure 46B is a plan view of the main components of another configuration of the substrate, support member, and light-receiving part in modified example 16 of the same lighting fixture. [Figure 47] Figure 47 is a cross-sectional view of the main parts of the light source module, support member, and infrared module in modified example 17 of the same lighting fixture. [Figure 48] Figure 48 is a cross-sectional view of the light source module, support member, infrared module, and other key components of a modified example 17 of the same lighting fixture. [Figure 49] Figure 49 is a cross-sectional view of yet another key component of the light source module, support member, and infrared module in modified example 17 of the same lighting fixture. [Figure 50] Figure 50 is a plan view of the main parts of the light source module and support member in modified example 18 of the same lighting fixture. [Figure 51] Figure 51 is a plan view of the light source unit in modified example 19 of the same lighting fixture. [Figure 52] Figure 52A is a plan view of the main parts of another configuration of the light source module and support member in the modified example 19 of the same lighting fixture. Figure 52B is a plan view of yet another configuration of the light source module in the modified example 19 of the same lighting fixture. [Modes for carrying out the invention]

[0013] Hereinafter, lighting fixtures and light source units according to embodiments of this disclosure will be described in detail with reference to the drawings. However, the figures described in the following embodiments are schematic diagrams, and the ratios of the size and thickness of each component do not necessarily reflect the actual dimensional ratios. Furthermore, the configurations described in the following embodiments are merely examples of this disclosure. This disclosure is not limited to the following embodiments, and various modifications are possible depending on the design, etc., as long as the effects of this disclosure can be achieved.

[0014] (1) Overview As shown in Figure 1, the lighting fixture A1 according to this embodiment comprises a support member 3, a light source (light source module 1), a light receiving unit 40, and a case 43.

[0015] The support member 3 has a first surface 30A and a second surface 30B opposite to the first surface 30A. The light source module 1 is supported by the support member 3 on the side of the first surface 30A. The light receiving unit 40 is located on the side of the second surface 30B of the support member 3. The case 43 houses the light receiving unit 40.

[0016] The support member 3 has a through hole 32 that penetrates from the first surface 30A to the second surface 30B. The light-receiving unit 40 faces the through hole 32. At least a portion of the case 43 (for example, the first portion 437) is permeable to electromagnetic waves (including infrared light and radio waves) received by the light-receiving unit 40.

[0017] In this embodiment, the lighting fixture A1 allows the light receiving unit 40 to receive an optical signal through the through-hole 32 in the support member 3 and the case 43. Therefore, the lighting fixture A1 in this embodiment can improve the light receiving sensitivity of the light receiving unit 40 by suppressing the attenuation of the optical signal until it passes through the through-hole 32 in the support member 3.

[0018] (2) Details As shown in Figures 2 and 3, the lighting fixture A1 (hereinafter referred to as lighting fixture A1) according to the embodiment of this disclosure comprises a light source unit B1 (hereinafter referred to as light source unit B1) according to the embodiment of this disclosure and a fixture body 6. The light source unit B1 is detachably attached to the fixture body 6 which is directly attached to the ceiling (building material). However, the fixture body 6 may be embedded in the ceiling, or it may be directly attached to the wall, or it may be embedded in the wall.

[0019] The fixture body 6 comprises a rectangular box-shaped housing 60 with an open bottom, a pair of reflectors 61 projecting diagonally upward from the open edges on both sides along the longitudinal direction of the housing 60, and a pair of end plates 62 provided at both ends in the longitudinal direction of the housing 60 and the pair of reflectors 61 (see Figure 3). The fixture body 6 is installed on the ceiling by inserting suspension bolts (not shown) through at least two of the multiple mounting holes 63 provided on the bottom surface of the housing 60, and tightening nuts (not shown) onto these suspension bolts. In addition, a power wire is inserted through one of the multiple power holes 64 provided on the bottom surface of the housing 60. The power wire inserted through the power hole 64 is electrically connected to a terminal block 65 attached to the inner bottom surface of the housing 60. Three wires 66 are drawn out from the terminal block 65. The ends of these three wires 66 are electrically connected to a single male power connector 67.

[0020] (2-1) Light source unit As shown in Figure 3, the light source unit B1 comprises a light source module 1, a power supply unit 2, a support member 3, an infrared module 4, and a cover 5.

[0021] (2-1-1) Light source module The light source module 1 has two substrates 11 and a number of LEDs (Light Emitting Diodes) 10 mounted on the surface (bottom surface) of each substrate 11. The light-emitting elements, LEDs 10, are, for example, packaged white LEDs for illumination. However, the light-emitting elements are not limited to LEDs and may also be organic electroluminescent elements or semiconductor laser elements, etc.

[0022] Each circuit board 11 is formed in a long rectangular shape. However, the circuit board 11 may be composed of multiple circuit boards connected in the longitudinal direction. Numerous LEDs 10 are mounted in a single row at equal intervals along the longitudinal direction of each circuit board 11, in the center of the short side of the surface (bottom surface) of each circuit board 11 (see Figure 3). The numerous LEDs 10 are electrically connected in series or series-parallel by printed wiring formed on the surface of each circuit board 11. In addition, two sets of connectors 12 are mounted on one end of the longitudinal side of the surface of each circuit board 11. The printed wiring formed on the surface of each circuit board 11 is electrically connected via the two sets of connectors 12.

[0023] (2-1-2) Support Member The support member 3 is formed from a metal plate into a long, rectangular trough shape. The support member 3 has a long, rectangular base plate 30 and a pair of side plates 31 that rise upward from both ends along the longitudinal direction of the base plate 30. The light source module 1 is attached to the first surface 30A (bottom surface) of the base plate 30 by a plurality of claws 301 cut out from the base plate 30. Note that the width of the base plate 30 in the short direction is greater than the width of the substrate 11 in the short direction (see Figure 3). However, the light source module 1 may also be attached to the base plate 30 by sliding the substrate 11 along the longitudinal direction of the base plate 30 and hooking it onto the plurality of claws 301, and then restricting the movement of the substrate 11 with retaining pieces provided on the base plate 30. Alternatively, an attachment method in which protrusions other than the claws 301 are hooked onto the ends of the substrate 11, or an attachment method in which the substrate 11 is bonded to the base plate 30 with adhesive may be used.

[0024] Furthermore, the base plate 30 has protrusions 34 at both ends in its short direction (see Figure 6). Each protrusion 34 is formed in a U-shape when viewed from the longitudinal direction of the base plate 30 and protrudes downward from the first surface 30A of the base plate 30. The pair of side plates 31 protrude upward from the outer ends of the protrusions 34.

[0025] Furthermore, the base plate 30 is provided with a through hole 32 that penetrates from the first surface 30A to the second surface 30B (top surface) of the base plate 30 (see Figure 6). This through hole 32 is located outside the light source module 1 and inside the protrusion 34 in the short-side direction of the base plate 30. In other words, the through hole 32 is located in a position that does not overlap with the light source module 1 when viewed from the thickness direction (up and down direction) of the base plate 30 (see Figure 6). Note that although the shape of the through hole 32 when viewed from the thickness direction of the base plate 30 is circular, it may also be an ellipse, quadrilateral, or other shape.

[0026] (2-1-3) Power supply unit As shown in Figure 3, the power supply unit 2 includes a power supply device 20 and a power supply case 21 that houses the power supply device 20. The power supply device 20 is composed of a printed circuit board 22 with various electronic components, including integrated circuits, and a female power connector 23 mounted on it. The power connector 23 is electrically and mechanically connected to a power connector 67.

[0027] The power supply case 21 is formed from a metal plate into a long, rectangular box shape with one side (the bottom) open. The power supply case 21 houses the power supply unit 20 and is fixed to the support member 3 with its opening facing the second surface 30B (top surface) of the bottom plate 30.

[0028] As shown in Figure 4, the power supply unit 20 is supplied with AC power from the commercial power grid 9 through the power connector 23. The power supply unit 20 includes a power conversion circuit 200, a constant current circuit 201, a control circuit 202, a control power supply circuit 203, a pair of output terminals 204 and 205, a signal terminal 206, a control power supply terminal 207, and a ground terminal 208. One output terminal 204 is electrically connected to the positive terminal of the light source module 1, and the other output terminal 205 is electrically connected to the negative terminal of the light source module 1.

[0029] The power conversion circuit 200 is configured to convert AC power supplied from the power system 9 into DC power. The power conversion circuit 200 includes, for example, a full-wave rectifier circuit, a power factor correction circuit (boost chopper circuit), and a buck converter (step-down chopper circuit). Alternatively, the power conversion circuit 200 may consist of a full-wave rectifier circuit and a converter circuit. The converter circuit has a single-stage converter (also called a one-converter) capable of performing voltage conversion and power factor correction in parallel. Specifically, the converter circuit has a SEPIC (Single Ended Primary Inductance Converter) type DC / DC converter circuit.

[0030] The constant current circuit 201 is configured to match the DC current supplied from the power conversion circuit 200 to the light source module 1 via a pair of output terminals 204 and 205 to a target value.

[0031] The control circuit 202 primarily comprises a microcontroller. The control circuit 202 is configured to switch the operation and shutdown of the power conversion circuit 200 and the constant current circuit 201, and to change the target value of the DC current (load current) in the constant current circuit 201, in accordance with the control information received from the infrared module 4.

[0032] The control circuit 202 receives a PWM (Pulse Width Modulation) signal from the infrared module 4 through the signal terminal 206 and the ground terminal 208. The PWM signal transmits control information by changing the duty cycle of a fixed-period square wave signal. For example, when the duty cycle is between 95% and 100%, control information is transmitted that sets the target load current to zero. Also, when the duty cycle is 5% or less, control information is transmitted that sets the target load current to the current rating of the light source module 1. Furthermore, when the duty cycle is any value within the range of 95% to 5%, control information is transmitted that sets the target load current to a corresponding value within the range of 5% to 100% of the rated current value of the light source module 1.

[0033] The control power supply circuit 203 is configured to generate a control power supply voltage from the DC output of the power conversion circuit 200. The control power supply circuit 203 is configured to create a control power supply voltage (for example, a DC voltage of about 5V to 3.3V) from the output voltage of the power conversion circuit 200. The control power supply circuit 203 applies the created control power supply voltage to the control power supply terminal 207 and the ground terminal 208 and supplies it to the infrared module 4 via two wires 46.

[0034] (2-1-4) Infrared module (2-1-4-1) Circuit configuration of the infrared module The infrared module 4 has a light receiving unit 40 and a signal circuit unit 41, and receives (receives light from) an optical signal (infrared signal) transmitted from the remote controller 7 (see Figure 4) to acquire control information. The infrared signal transmitted from the remote controller 7 conforms to a standard defined by, for example, the Japan Home Appliance Manufacturers' Association, the so-called JFA format. In the JFA format, the carrier wave consists of an infrared signal with a peak wavelength of 900-950 nm, a duty cycle of 50%, and a frequency of 33 kHz or higher and 40 kHz or lower, which is pulse-position modulated. However, the optical signal may be an infrared signal conforming to a protocol other than the JFA format. Alternatively, the optical signal may use light other than infrared (for example, visible light).

[0035] The light-receiving unit 40 has a light-receiving element (for example, a photodiode or phototransistor) for receiving infrared light (infrared light). The light-receiving unit 40 shapes the output signal of the light-receiving element and amplifies it before outputting it. In other words, the light-receiving unit 40 converts the optical signal (infrared signal) into an electrical signal and outputs it. In the following description, the electrical signal output from the light-receiving unit 40 will be referred to as the received signal.

[0036] The signal circuit unit 41 demodulates the received signal output by the light receiving unit 40 to acquire control information. The control information includes commands such as a lighting command to turn on the light source unit B1, a turning-off command to turn off the light source unit B1, and a dimming command to specify the dimming ratio of the light source unit B1.

[0037] Furthermore, the signal circuit unit 41 converts the acquired control information (on command, off command, and dimming command) into a PWM signal. For example, if the signal circuit unit 41 acquires an on command, it converts it into a PWM signal with a duty cycle of 3%, and if it acquires an off command, it converts it into a PWM signal with a duty cycle of 100%. Also, if the signal circuit unit 41 acquires a dimming command, it converts it into a PWM signal with a duty cycle corresponding to the dimming ratio indicated in the dimming command. The signal circuit unit 41 outputs the converted PWM signal to the signal terminal 206 and ground terminal 208 of the power supply unit 20. The light receiving unit 40 and the signal circuit unit 41 operate on the control power supply voltage supplied from the control power supply circuit 203 of the power supply unit 20.

[0038] (2-1-4-2) Structure of an infrared module As shown in Figure 5, the infrared module 4 has a circuit board 42 and a case 43. The circuit board 42 is formed in a rectangular shape. A light receiving unit 40, a signal circuit unit 41, a signal connector, etc. are mounted on the surface (bottom surface) of the circuit board 42. However, the signal connector is not shown in Figure 5.

[0039] The light-receiving unit 40 has a light-receiving lens 401 on one side of a rectangular parallelepiped package 400 (see Figure 5). The light-receiving lens 401 is configured to focus infrared signals (infrared light) onto a light-receiving element such as a photodiode or phototransistor housed in the package 400.

[0040] (2-1-4-3) Case In Figure 5, the up / down, left / right, and front / back directions indicated by the arrows are defined as the up / down, left / right, and front / back directions of the infrared module 4, respectively.

[0041] As shown in Figures 5 and 6, case 43 has a bottom wall 430, a front wall 431, a rear wall 432, a side wall 433, and a top wall 434, and is formed in a box shape with the left side open. Case 43 also has support parts 435 on the front wall 431 and the rear wall 432, respectively, to support both ends of the circuit board 42 along the longitudinal direction. Case 43 is constructed as a synthetic resin molded body made of a synthetic resin material such as polycarbonate resin. However, case 43 may be formed from a material other than synthetic resin, including metal, or from a hybrid material of metal and synthetic resin.

[0042] A circular first portion 437 is formed at the rear end of the rightmost part of the lower wall 430. The first portion 437 has a smaller thickness (width in the vertical direction; the same applies hereinafter) compared to the lower wall 430 (corresponding to the second portion), and faces the light-receiving lens 401 of the light-receiving unit 40 mounted on the circuit board 42 along the vertical direction (see Figures 5 and 6). In other words, since the first portion 437 has a smaller thickness than the second portion (lower wall 430), the infrared transmittance is higher than that of the second portion. Therefore, the light-receiving unit 40 can receive infrared signals arriving from outside the case 43 mainly through the first portion 437 with the light-receiving lens 401. However, the case 43 may be formed integrally by two-color molding of the second portion (lower wall 430) and the first portion 437 using different synthetic resin materials. In this case, it is preferable that the infrared transmittance of the synthetic resin material forming the first portion 437 is sufficiently higher than the infrared transmittance of the synthetic resin material forming the lower wall 430.

[0043] Here, the first portion 437 of case 43 faces the through hole 32 provided in the bottom plate 30 of the support member 3 in the vertical direction (see Figures 5 and 6). Therefore, by designing the size of the first portion 437 and the through hole 32 to be optimal, it is possible to secure the necessary receiving distance for the infrared module 4 while reducing the possibility of receiving optical signals (infrared signals) transmitted to other light source units. The first portion 437 may also be provided in the lower or central part in the thickness direction (vertical direction) of the lower wall 430 (second portion).

[0044] The front wall 431 and rear wall 432 of case 43 each have one coupling male part 436. Each coupling male part 436 is formed in an E shape. Each coupling male part 436 is mechanically coupled to a pair of coupling female parts provided on the power supply case 21 (see Figure 3). The pair of coupling female parts are provided on one longitudinal side of the power supply case 21.

[0045] The case 43 is attached to one end of the power supply case 21 in the longitudinal direction by connecting a pair of male coupling parts 436 to a pair of female coupling parts (see Figure 3). Therefore, the lighting fixture A1 does not require a structure for attaching the case 43 to the support member 3, thus reducing the number of parts and the assembly process. However, the case 43 may also be attached to the support member 3 (for example, the side plate 31 of the support member 3). By attaching the case 43 to the support member 3, the lighting fixture A1 can increase the flexibility of the installation location of the infrared module 4. The three wires 46 of the infrared module 4 are electrically connected to the signal terminal 206, control power terminal 207, and ground terminal 208 of the power supply unit 20 by connecting plug connectors to receptacle connectors mounted on the printed circuit board 22 of the power supply unit 20 (see Figure 4).

[0046] (2-1-5) Cover The cover 5 has a cover body 50, a pair of protruding walls 51, and a pair of extensions 53 (see Figures 3 and 6). The cover body 50 is formed in a long semi-cylindrical shape. However, the shape of the cover body 50 is not limited to a long semi-cylindrical shape, and may be any shape such as a rectangular tube. The pair of extensions 53 protrude inward from both ends in the short direction of the cover body 50 along the longitudinal direction of the cover body 50. The pair of protruding walls 51 protrude upward along the longitudinal direction of the cover body 50 from connecting pieces 531 (described later) of the pair of extensions 53 (see Figure 6). A hook-shaped hook portion 52 is integrally provided at the upper end of each protruding wall 51 along the longitudinal direction of each protruding wall 51. The cover body 50, the pair of protruding walls 51, and the pair of hook portions 52 are integrally formed from a translucent synthetic resin such as acrylic resin or polycarbonate resin. However, the cover body 50, the pair of protruding walls 51, and the pair of extensions 53 may be made of a translucent material other than synthetic resin, such as inorganic glass such as quartz glass. The cover 5 houses the support member 3 between the pair of protruding walls 51, and is attached to the support member 3 by hooking the hooks 52 provided on the upper ends of the pair of protruding walls 51 onto the tips (upper ends) of the pair of side plates 31 of the support member 3 (see Figure 6).

[0047] The pair of extensions 53 are configured to cover at least a portion of the first surface 30A of the bottom plate 30 of the support member 3 that is exposed to the outside of the light source module 1 (see Figure 6). The through hole 32 of the support member 3 is provided in the region S2 sandwiched between the light source module 1 and one of the extensions 53 (see Figure 6).

[0048] Each extension 53 has a main piece 530, a connecting piece 531, and a side piece 532 (see Figure 6). The connecting piece 531 is formed in a rectangular flat shape and protrudes inward from both ends in the short direction of the cover body 50 along the longitudinal direction of the cover body 50. The main piece 530 is formed in a V shape when viewed from the longitudinal direction and protrudes inward from the tip of the connecting piece 531 along the longitudinal direction of the cover body 50. The side piece 532 is formed in a rectangular flat shape and protrudes upward from the tip of the main piece 530 along the longitudinal direction of the cover body 50. The upper end of the side piece 532 contacts the first surface 30A of the bottom plate 30 of the support member 3 when the cover 5 is attached to the support member 3 (see Figure 6). Furthermore, a portion of the main piece 530 (the portion outside the lowest end of the main piece 530) faces the projection 34 of the support member 3 with a small gap between them when the cover 5 is attached to the support member 3 (see Figure 6). This allows the projection 34 to contact the main piece 530 when an external force is applied to the cover 5, thereby suppressing excessive deformation of the extension 53.

[0049] Here, the cover body 50 is configured to diffuse the light (illumination light) emitted from the light source module 1. Specifically, the cover body 50 (or the entire cover 5) is made of synthetic resin, and a light-diffusing filler is filled into it, thereby imparting light diffusion properties to the cover body 50. Most of the light emitted from the light source module 1 (LED 10) enters the cover body 50 from its inner surface (top surface), is diffused by the filler, and exits the cover 5 from at least a portion of its outer surface (bottom surface). However, some of the light emitted from the light source module 1 is reflected from the inner surface of the cover body 50 and returns to the support member 3. Some of the light reflected from the inner surface of the cover body 50 is then reflected from the surface (bottom surface) of each extension 53 of the cover 5 and then passes through the cover body 50. However, some of the light emitted from the light source module 1 may also be directly reflected from the surface (bottom surface) of each extension 53.

[0050] Furthermore, the through-hole 32 that penetrates the bottom plate 30 of the support member 3 is located in the region S2 sandwiched between the light source module 1 (substrate 11) and the extension 53 (side piece 532). Therefore, the infrared signal transmitted from the remote controller 7, after passing through the cover body 50, is received by the light receiving unit 40 through the through-hole 32 and the insulating member 36 without passing through the extension 53 (see dashed line X1 in Figure 6).

[0051] Here, it is preferable that the extension portion 53 is formed such that the reflectance of its surface (bottom surface) to visible light is higher than the reflectance of the inner surface of the cover body 50 to visible light. For example, when the extension portion 53 and the cover body 50 are integrally formed by two-color molding, it is preferable that the type or amount of filler filled in the synthetic resin forming the extension portion 53 is different from the type or amount of filler filled in the synthetic resin forming the cover body 50. Alternatively, the surface (bottom surface) of the extension portion 53 may be formed by two-layer two-color molding such that its reflectance to visible light is higher than that of the back surface (top surface) of the extension portion 53. In other words, the first layer 53A, including the back surface of the extension portion 53, may be formed of synthetic resin filled with the same type and amount of filler as the cover body 50, and the second layer 53B, including the surface of the extension portion 53, may be formed of synthetic resin filled with a different type of filler than that of the cover body 50, or with the same type but a different amount of filler (see Figure 7). Alternatively, the reflectivity to visible light may be increased by applying paint to the surface of the extension portion 53, which is made of the same synthetic resin as the cover body 50.

[0052] (2-2) Advantages of the lighting fixture according to the embodiment As described above, the lighting fixture A1 can receive an optical signal (infrared signal) in the light-receiving unit 40 through the through-hole 32 in the support member 3. Therefore, the lighting fixture A1 can improve the light-receiving sensitivity of the light-receiving unit 40 by suppressing the attenuation of the optical signal until it passes through the through-hole 32 in the support member 3. Moreover, since a part of the case 43 that houses the light-receiving unit 40 (the first part 437) of the lighting fixture A1 is configured to allow infrared light to pass through, it is possible to prevent foreign objects such as insects from entering the case 43. It is preferable that the case 43 be made of a material that can transmit infrared rays, such as a synthetic resin material such as polyethylene terephthalate.

[0053] Furthermore, since the lighting fixture A1 has an extension portion 53 on the cover 5 that protrudes along the first surface 30A of the base plate 30 toward the light source module 1, the light distribution of the light emitted from the light source module 1 can be adjusted by the extension portion 53. For example, by making the surface (bottom surface) of the extension portion 53 a reflective surface, the lighting fixture A1 can improve the light extraction efficiency.

[0054] Furthermore, the lighting fixture A1 can protect the light source module 1 and control the light distribution (e.g., diffusion) of the light emitted from the light source module 1 by covering the light source module 1 from the direction opposite to the first surface 30A of the base plate 30 (downward). However, the cover 5 may have one or more lenses and be configured to control the light distribution by the lenses.

[0055] Furthermore, since the lighting fixture A1 adjusts the power supply from the power supply unit 20 to the light source module 1 in accordance with the infrared signal received by the light receiving unit 40, the power supply unit 20 can be remotely controlled. In addition, since the lighting fixture A1 uses infrared light as the medium for its optical signals, it is less susceptible to interference from light (visible light) emitted from other lighting fixtures, for example, compared to cases where visible light is used as the medium, and the accuracy of optical signal reception in the light receiving unit 40 can be improved.

[0056] Furthermore, since the lighting fixture A1 reflects the light emitted from the light source module 1 with the extension portion 53 of the cover 5, it is possible to reduce manufacturing costs and assembly processes by reducing the number of parts compared to the case where a separate reflective member is provided from the cover 5. Moreover, since the lighting fixture A1 has the extension portion 53 protruding from the end of the cover 5 (cover body 50) along the first surface 30A toward the light source module 1, the light extraction efficiency of the light emitted from the light source module 1 can be improved by covering a part of the first surface 30A of the bottom plate 30 with the extension portion 53. In addition, the lighting fixture A1 can further improve the light extraction efficiency by tilting the lower surface of the extension portion 53 toward the light source module 1 as it moves away from the first surface 30A.

[0057] Furthermore, since the lighting fixture A1 has a protrusion 34 on the support member 3, the mechanical strength of the support member 3 can be improved compared to a case where the protrusion 34 is not provided. Moreover, by having the protrusion 34 protrude from the first surface 30A of the base plate 30, the lighting fixture A1 can reduce the possibility of the light receiving unit 40 mistakenly receiving infrared signals arriving from the side in the short direction of the fixture body 6.

[0058] Here, since the lighting fixture A1 covers at least a portion of the protrusion 34 with the extension 53, it becomes unnecessary to perform treatments such as painting the surface of the protrusion 34 in order to improve the light extraction efficiency of the light source module 1. As a result, the manufacturing cost of the lighting fixture A1 can be reduced.

[0059] Furthermore, since the lighting fixture A1 has a portion of its extension 53 (the tip of the side piece 532) in contact with the first surface 30A of the base plate 30 (see Figure 6), excessive deformation of the extension 53 can be suppressed when some external force is applied to the cover 5.

[0060] Here, because the main piece 530 of the extension 53 is formed in a V-shape, a gap 533 is created between the main piece 530 and the base plate 30 (see Figure 6). Therefore, the lighting fixture A1 can effectively utilize the gap 533, which would otherwise be dead space, by housing various parts, for example, screws 300 for fixing mounting members that attach the support member 3 to the fixture body 6 to the base plate 30, in the gap 533. Note that the parts that can be housed in the gap 533 are not limited to screws.

[0061] Furthermore, by positioning the infrared module 4 adjacent to the power supply unit 2, the lighting fixture A1 has the following advantages.

[0062] The smaller the difference between the frequency of common-mode noise flowing from the power supply unit 20 through the power supply case 21 to the support member 3 and the frequency of the infrared signal carrier (33kHz to 40kHz), the higher the likelihood that the common-mode noise will interfere with the received signal. If the common-mode noise interferes with the received signal, the likelihood of the power supply unit 2 malfunctioning or becoming inoperable increases.

[0063] However, in lighting fixture A1, since the infrared module 4 is located adjacent to the power supply unit 2, the wire 46 (see Figure 4) electrically connecting the infrared module 4 and the power supply unit 2 can be shortened. In other words, by shortening the wire 46 electrically connecting the infrared module 4 and the power supply unit 2, lighting fixture A1 can reduce the possibility of the received signal interfering with common-mode noise. As a result, lighting fixture A1 can improve the noise immunity (S / N ratio) of the infrared signal.

[0064] Furthermore, since the case 43 of the infrared module 4 is attached to the power supply case 21 of the power supply unit 2, the lighting fixture A1 can further shorten the wire 46 that electrically connects the infrared module 4 and the power supply unit 2. As a result, the lighting fixture A1 can further improve the noise immunity of the infrared signal.

[0065] However, if the light-receiving lens 401 of the light-receiving unit 40 is placed outside the case 43, the infrared signal reception range becomes too wide, which could lead to the reception of infrared signals transmitted towards other lighting fixtures.

[0066] In contrast, lighting fixture A1 allows the light-receiving unit 40 to receive infrared signals mainly through the first part 437 of the case 43, thus narrowing the range in which the light-receiving unit 40 can receive infrared signals. As a result, lighting fixture A1 can reduce the possibility of mistakenly receiving infrared signals that are being sent to other lighting fixtures.

[0067] Furthermore, the first portion 437 of the case 43 overlaps with the through-hole 32 of the support member 3 along the thickness direction of the bottom plate 30. Therefore, the infrared signal transmitted from the remote controller 7 is received by the light receiving unit 40 through the through-hole 32 of the support member 3, mainly through the first portion 437 of the case 43. For example, if the light receiving lens 401 of the light receiving unit 40 were placed on the surface (bottom surface) of the support member 3 (bottom plate 30), the infrared signal reception range would become too wide, potentially leading to the reception of infrared signals transmitted towards other lighting fixtures.

[0068] In contrast, lighting fixture A1 allows the light-receiving unit 40 to receive infrared signals by having it receive the infrared signal through the through-hole 32 of the support member 3 and mainly through the first part 437 of the case 43, thereby narrowing the range in which the light-receiving unit 40 can receive infrared signals. As a result, lighting fixture A1 can reduce the possibility of mistakenly receiving infrared signals that are transmitted to other lighting fixtures. However, the light-receiving lens 401 of the light-receiving unit 40 may be inserted into the through-hole 32 to improve the light-receiving sensitivity. In this case, the tip (lower end) of the light-receiving lens 401 may or may not protrude below the first surface 30A of the bottom plate 30.

[0069] Incidentally, the through-hole 32 is positioned so as not to overlap with the light source module 1 when viewed from the thickness direction of the bottom plate 30 (see Figure 6). For example, if the through-hole were positioned to overlap with the light source module 1, a hole would be provided in the substrate 11 at the same position as the through-hole, causing the pitch of the LEDs 10 to be partially increased near the hole. As a result, the uniformity of the light distribution characteristics of the light source module may decrease.

[0070] In contrast, lighting fixture A1 can reduce the possibility of mistakenly receiving infrared signals transmitted to other lighting fixtures while simultaneously achieving uniformity in the light distribution characteristics of the light source module 1.

[0071] Furthermore, in the lighting fixture A1, a cylindrical peripheral wall 45 may be provided around the first portion 437 of the case 43 (see Figure 8). The peripheral wall 45 protrudes downward from the lower wall 430 so as to surround the first portion 437 in the second portion (lower wall 430) of the case 43. The infrared signal that passes through the through hole 32 of the bottom plate 30 is reflected by the inner surface of the peripheral wall 45 provided on the case 43, and is transmitted through the first portion 437 of the case 43 to be received by the light receiving unit 40. Therefore, the lighting fixture A1 can achieve further improvement in the light receiving sensitivity of the light receiving unit 40 compared to the case in which the peripheral wall 45 is not provided.

[0072] Furthermore, the inner surface of the peripheral wall 45 may be formed in a truncated cone shape, with the inner diameter decreasing from the tip (lower end) of the peripheral wall 45 toward the first portion 437. If the inner surface of the peripheral wall 45 is formed in a truncated cone shape, most of the infrared signals that enter the interior of the peripheral wall 45 through the through hole 32 can reach the first portion 437 and be received by the light receiving unit 40. In other words, the lighting fixture A1 can prevent the erroneous reception of unnecessary infrared signals (wireless signals transmitted toward other lighting fixtures) while increasing the reception sensitivity of necessary infrared signals (infrared signals transmitted toward lighting fixture A1).

[0073] Here, we assume a lighting space E1 in which numerous lighting fixtures A1 are installed on the ceiling at equal intervals (see Figure 9). This lighting space E1 is, for example, one floor of an office building, where multiple lighting fixtures A1 are installed so as to be arranged vertically and horizontally at equal intervals. The vertical spacing (the long side of the light source unit B1) of the multiple lighting fixtures A1 is denoted as P1, and the horizontal spacing (the short side of the light source unit B1) is denoted as P2.

[0074] For example, when operator H1 operates the remote controller 7 to turn on only one lighting fixture A1 directly above, it is desirable to minimize the possibility of the infrared signal transmitted from the remote controller 7 being received by the adjacent lighting fixture A1. In other words, it is preferable that the range in which the light receiving unit 40 of each lighting fixture A1 can receive the infrared signal is narrower than the sum of the length of the lighting fixture A1 in the longitudinal direction and twice the vertical spacing P1, and also narrower than the sum of the length of the lighting fixture A1 in the short direction and twice the horizontal spacing P2. However, the range in which the infrared signal transmitted from the remote controller 7 can reach is, for example, within a 20-degree angle from the tip of the remote controller 7 and at a distance of 5m to 6m from the tip of the remote controller 7.

[0075] However, by setting the size of the first part 437, the size of the through hole 32, and the size of the peripheral wall 45 (axial length and inner diameter) of the lighting fixture A1 to appropriate values, it is possible to prevent the reception of unwanted infrared signals while increasing the sensitivity to receiving necessary infrared signals.

[0076] Incidentally, in lighting fixture A1, abnormal noises may occur due to the difference in thermal expansion coefficients between the metal support member 3 and the synthetic resin cover 5. In other words, at the contact surface between the support member 3 and the cover 5, when the expansion and contraction force of the synthetic resin cover 5, which has a relatively large thermal expansion coefficient, exceeds the maximum static friction force, the strain that had been generated in the cover 5 is suddenly released. As the strain in the cover 5 is suddenly released, a frictional noise accompanied by vibration is generated at the contact surface between the cover 5 and the support member 3. This phenomenon is generally known as the stick-slip phenomenon. Furthermore, it is thought that abnormal noises due to the stick-slip phenomenon are more likely to occur the larger the contact area between the two members (support member 3 and cover 5).

[0077] Therefore, in lighting fixture A1, a plurality of ribs 510 are provided along the longitudinal direction of the cover body 50 on the surfaces of the pair of protruding walls 51 of the cover 5 that face the side plates 31 (see Figure 7). These plurality of ribs 510 are formed at a height that allows them to contact the side plates 31. In other words, the pair of protruding walls 51 of the cover 5 can contact the pair of side plates 31 of the support member 3 at the tips of the ribs 510, so the contact area between the cover 5 and the support member 3 is reduced compared to the case where the ribs 510 are not provided. As a result, lighting fixture A1 can suppress the generation of abnormal noise associated with the stick-slip phenomenon. However, the location where the ribs 510 are provided is not limited to the protruding walls 51, but may also be provided on the side plates 31 of the support member 3.

[0078] Incidentally, the lighting fixture A1 according to this embodiment comprises a fixture body 6 fixed to a building material such as a ceiling, and a light source unit B1 detachably attached to the fixture body 6. However, the support member, which is a component of the light source unit B1, may be integrally formed with the fixture body. It is obvious that the lighting fixture according to this embodiment has the advantages described above even when the support member and the fixture body are integrally formed.

[0079] (3) Modified example of a lighting fixture according to the embodiment Next, several modifications of the lighting fixture A1 according to the embodiment will be described. However, the basic configuration of each modification of lighting fixture A1 described below is the same as the basic configuration of lighting fixture A1 according to the embodiment. Therefore, components that are common to or substantially common with the basic configuration of lighting fixture A1 according to the embodiment will be denoted by the same reference numerals, and their illustration and description will be omitted as appropriate. In the following description, "substantially common components" means components that differ slightly in shape, size, etc., but have the same function.

[0080] (3-1) Variation 1 The lighting fixture A1 of the modified example 1 is characterized by the configuration of the case 43 of the infrared module 4.

[0081] In Modified Example 1, the case 43 lacks a bottom wall 430, and the surface facing the bottom plate 30 (bottom surface) is open (see Figures 10A and 10B). The case 43 houses a light-receiving unit 40 and a circuit board 42 on which a signal circuit is mounted. The light-receiving lens 401 of the light-receiving unit 40 faces the through-hole 32 in the bottom plate 30 in the vertical direction. In other words, the lighting fixture A1 of Modified Example 1 can receive infrared signals through the opening in the bottom surface of the case 43 to the light-receiving unit 40. However, in order to ensure an electrical insulation distance between the circuit board 42 housed in the case 43 and the metal support member 3, it is preferable to place an insulating member 36 between the bottom opening of the case 43 and the bottom plate 30 of the support member 3.

[0082] The insulating member 36 is placed on the second surface 30B of the bottom plate 30. The insulating member 36 is a sheet-like member made of a material that can transmit infrared rays, for example, an insulating sheet made of a synthetic resin material such as polyethylene terephthalate. However, the insulating member 36 is not limited to an insulating sheet, and may be made of any material that can transmit infrared rays and has electrical insulating properties.

[0083] The insulating member 36 is fixed to the bottom plate 30 by being attached to the second surface 30B of the bottom plate 30 with adhesive (see 10A). Alternatively, the insulating member 36 may be fixed to the bottom plate 30 by being sandwiched between the lower end of the case 43 and the bottom plate 30 (see Figure 10B).

[0084] However, in the lighting fixture A1 of the modified example 1, one side (bottom surface) of the case 43 facing the through hole 32 of the support member 3 is open, so the reception sensitivity can be increased compared to the case in which the infrared signal is received by the light receiving unit 40 through the first part 437 of the bottom wall 430 of the case 43. In addition, in the lighting fixture A1 of the modified example 1, the manufacturing process can be simplified by sandwiching the insulating member 36 between the case 43 and the bottom plate 30, thereby eliminating the work of attaching the insulating member 36 to the bottom plate 30.

[0085] (3-2) Modification example 2 The lighting fixture A1 of the modified example 2 is characterized in that the infrared module 4 is housed together with the power supply unit 20 in a power supply case 21.

[0086] In the modified example 2, the light-receiving unit 40 and the signal circuit unit 41 of the infrared module 4 are mounted on the printed circuit board 22 of the power supply unit 20 (see Figure 11A). The light-receiving unit 40 is mounted on the lower surface of the printed circuit board 22, with the light-receiving lens 401 facing the second surface 30B of the bottom plate 30. However, the infrared module 4 may be mounted on a separate circuit board (for example, circuit board 42 in the embodiment) from the printed circuit board 22 of the power supply unit 20, and connected to the printed circuit board 22 via a connector mounted on the circuit board and housed in the power supply case 21. In this case, the infrared module 4 (or its circuit board) may be housed in the power supply case 21 horizontally alongside the power supply unit 20 (or its printed circuit board 22), or it may be housed vertically with the infrared module 4 facing downwards.

[0087] The power supply case 21 has an open bottom, similar to the case 43 in Modification 1. Therefore, the lighting fixture A1 in Modification 2 can receive infrared signals through the opening on the bottom of the power supply case 21 to the light receiving unit 40. However, in order to ensure an electrical insulation distance between the printed circuit board 22 housed in the power supply case 21 and the metal support member 3, it is preferable to place an insulating member 36 between the opening on the bottom of the power supply case 21 and the bottom plate 30 of the support member 3.

[0088] In the modified example 2, the insulating member 36 has a bottom plate 360 ​​and a pair of side plates 361 bent upward from both ends along the longitudinal direction of the bottom plate 360. The longitudinal direction of the bottom plate 360 ​​and the pair of side plates 361 are integrally formed by folding a sheet (insulating sheet) made of a synthetic resin material such as polyethylene terephthalate into a trough shape (see Figures 11A and 12A).

[0089] The insulating member 36 is housed inside the power supply case 21 (see Figures 11A and 12A). The insulating member 36 housed inside the power supply case 21 closes the opening on the bottom surface of the power supply case 21 with a bottom plate 360, and a pair of side plates 361 are positioned along the inner surface of the power supply case 21. The insulating member 36 plays a role in ensuring an insulating distance between the circuit components and printed wiring of the printed circuit board 22 and the metal power supply case 21 and support member 3 (bottom plate 30).

[0090] However, in the modified example 2, the lighting fixture A1 blocks the through-hole 32 with an insulating member 36 that can transmit infrared rays, thereby preventing foreign matter from entering the first surface 30A of the bottom plate 30 through the through-hole 32 without obstructing the reception of infrared signals by the light receiving unit 40. Moreover, since the insulating member 36 of the lighting fixture A1 in the modified example 2 also serves to ensure the insulation distance of the power supply unit 20, manufacturing costs can be reduced by reducing the number of parts. Furthermore, since the case of the infrared module 4 in the lighting fixture A1 in the modified example 2 is shared with the power supply case 21, manufacturing costs can be reduced by reducing the number of parts. In addition, since the infrared module 4 (light receiving unit 40, signal circuit unit 41, etc.) in the lighting fixture A1 in the modified example 2 is mounted on the printed circuit board 22 of the power supply unit 20, the wires connecting the infrared module 4 and the power supply unit 20 can be replaced with printed wiring. Therefore, in the modified example 2, the lighting fixture A1 does not require a wire to connect the infrared module 4 and the power supply unit 20, thus reducing manufacturing costs by decreasing the number of parts and manufacturing processes.

[0091] If the infrared transmittance of the bottom plate 360 ​​of the insulating member 36 is insufficient, a hole 3600 may be provided in the bottom plate 360 ​​(first insulating member) opposite the through hole 32, and the hole 3600 may be blocked with another insulating member (second insulating member 363) (see Figure 11B). In this way, it is possible to prevent the intrusion of foreign matter while suppressing a decrease in the light receiving sensitivity of the light receiving unit 40.

[0092] Here, the insulating member 36 may also include a top plate 362 that protrudes from the tip (upper end) of one of the side plates 361 (see Figure 12B). In other words, by placing the top plate 362 between the printed circuit board 22 and the bottom of the power supply case 21, the insulating distance between the printed circuit board 22 and the power supply case 21 can be further increased.

[0093] Furthermore, the insulating member 36 may be formed in a shape in which the bottom plate 360 ​​is curved downward in an arc (see dashed line in Figure 12C). Alternatively, the tip (upper end) of one side plate 361 of the insulating member 36 may be in contact with the printed circuit board 22 (see Figure 12D). The tip of the side plate 361 may be a part other than the printed circuit board 22, for example, the inner bottom surface (top surface) of the power supply case 21, or a bridge formed on the side of the power supply case 21 to support the printed circuit board 22. In any case, when the power supply case 21 is attached to the support member 3, the insulating member 36 deforms when pressed by the bottom plate 30, and the gap between the insulating member 36 and the bottom plate 30 and power supply case 21 can be narrowed (see Figures 12C and 12D).

[0094] (3-3) Modification example 3 In the lighting fixture A1 of the modified example 3, the case 43 has a case body 43A and a case cover 43B made of synthetic resin (see Figures 13A and 13B). The case body 43A is formed in the shape of a rectangular parallelepiped box with an open bottom. The case cover 43B is shallower than the case body 43A (shorter in height in the vertical direction) and is formed in the shape of a rectangular parallelepiped box with an open top. The case cover 43B is connected to the case body 43A so as to close the opening on the bottom of the case body 43A.

[0095] A first portion 437 is provided on the bottom surface of the case cover 43B. The outer shape of the first portion 437 is circular. A cylindrical peripheral wall portion 440 is provided around the first portion 437 on the inner bottom surface of the case cover 43B. The upper end of the peripheral wall portion 440 is open and faces the light-receiving lens 401 of the light-receiving unit 40. The lower end of the peripheral wall portion 440 is closed by the first surface 30A. Furthermore, an annular rib 442 is provided around the first portion 437 on the outer bottom surface of the case cover 43B.

[0096] Case 43 is attached to the power supply case 21 or the support member 3. When case 43 is attached to the power supply case 21 or the support member 3, the lower end of the rib 442 is in contact with the area around the through hole 32 in the second surface 30B of the bottom plate 30 (see Figures 13A and 13B). In other words, the through hole 32 of the support member 3 is blocked by the first part 437 and the rib 442.

[0097] However, in the modified example 3, the lighting fixture A1 can receive infrared signals transmitted from the remote controller 7 by passing them through the through-hole 32 of the support member 3 (bottom plate 30) and through the first part 437 of the case 43 (case cover 43B) to the light receiving unit 40. Moreover, since the ribs 442 of the case cover 43B are in contact with the second surface 30B of the bottom plate 30, it is possible to prevent foreign matter from entering the first surface 30A of the bottom plate 30 through the through-hole 32 of the bottom plate 30. Furthermore, since the infrared signals that have passed through the first part 437 of the case cover 43B are reflected from the inner surface of the peripheral wall 440 and received by the light receiving unit 40, the range in which infrared signals can be received can be expanded.

[0098] The entire case cover 43B may be formed of a material and thickness that allows infrared signals to pass through. Alternatively, the first portion 437 of the case cover 43B may be formed of a material that allows infrared signals to pass through, while the peripheral wall portion 440 and the portion excluding the first portion 437 may be formed of a material that does not allow infrared signals to pass through (see Figure 14A).

[0099] However, the case cover 43B only needs to have a first portion 437 that can transmit infrared signals, and the entire case cover 43B (second portion) excluding the first portion 437 may be made of a material that does not transmit infrared signals well. In this case, unwanted infrared signals are less likely to pass through the second portion of the case cover 43B and be received by the light receiving unit 40, thus suppressing malfunctions of the power supply unit 20 due to stray light, etc. Note that the rib 442 does not need to be provided on the lower surface of the case cover 43B (see Figure 14B). Alternatively, the area around the first portion 437 may be surrounded by a sealing member such as an O-ring instead of the rib 442.

[0100] Furthermore, the peripheral wall portion 440 of the case cover 43B may be formed so as to surround the light-receiving lens 401 of the light-receiving unit 40 at its upper end (see Figure 15A). In this case, unwanted infrared signals are less likely to be received by the light-receiving unit 40, thus further suppressing malfunctions of the power supply unit 20 due to stray light, etc. However, the case cover 43B does not have to have the peripheral wall portion 440 (see Figure 15B).

[0101] Alternatively, the tip portion (upper end portion) of the peripheral wall portion 440 may be tapered (tumulus-shaped) (see Figure 16). The aperture diameter of the tip portion of the peripheral wall portion 440 may be larger than or smaller than the lens diameter of the light-receiving lens 401 of the light-receiving unit 40. In this case, the infrared signal is concentrated by the tip portion of the peripheral wall portion 440, thereby increasing the intensity of the infrared signal received by the light-receiving lens 401 and improving the reception sensitivity.

[0102] In addition, in the lighting fixture A1 of the modified example 3, the case body 43A may also be used as the power supply case 21, and the circuit board 42 of the infrared module 4 may be housed in the power supply case 21 together with the power supply unit 20. Alternatively, the case 4 (case body 43A and case cover 43B) may be housed in the power supply case 21. Furthermore, the circuit board 42 may be housed in the case 43 in an upright position.

[0103] (3-4) Modification 4 The lighting fixture A1 of Modified Example 4 is characterized by the extension portion 53 of the cover 5. In Modified Example 4, as shown in Figure 17A, for example, the tip (upper end) of the side piece 532 of the extension portion 53 is separated from and does not make contact with the first surface 30A of the support member 3 (the bottom plate 30). In other words, by preventing the tip of the side piece 532 from making contact with the support member 3, the generation of abnormal noise associated with the stick-slip phenomenon described above can be suppressed.

[0104] Furthermore, the extension portion 53 in the modified example 4 does not necessarily have to have a side piece 532 (see Figure 17B). In this case, the tip of the main piece 530 of the extension portion 53 may or may not be in contact with the first surface 30A of the base plate 30.

[0105] Alternatively, in the modified example 4, the portion of the main piece 530 of the extension 53 that is inside the projection 34 of the support member 3 may be formed to be substantially parallel to the first surface 30A of the base plate 30 (see Figure 17C). In this case, it is preferable that the main piece 530 and the through hole 32 of the base plate 30 do not overlap when viewed from the thickness direction (vertical direction) of the base plate 30. However, it is acceptable for a part of the main piece 530 to overlap with the through hole 32. When a part of the main piece 530 overlaps with the through hole 32, it is possible to suppress the passage of light other than infrared signals (for example, visible light emitted from the light source module 1) through the through hole 32, thereby improving the light receiving sensitivity of the light receiving unit (40).

[0106] Here, at least a portion of the extension 53 may be formed from a different material (synthetic resin material) than the cover body 50 (two-color molding) (see Figure 17D). For example, the entire extension 53 may be filled with filler to form a white color, while the cover body 50 may be filled with a smaller amount of filler than the extension 53, or a different filler may be filled to form a milky white color. The tip of the extension 53 may or may not contact the first surface 30A of the bottom plate 30 of the support member 3. When the tip of the extension 53 is in contact with the first surface 30A of the bottom plate 30, there is an advantage in that the intrusion of foreign matter can be suppressed.

[0107] Furthermore, the entire main piece 530, rather than just a part of it, may be formed to be substantially parallel to the first surface 30A of the base plate 30 (see Figure 18). In this case, it is preferable that the support member 3 does not have a pair of protrusions 34, and that both ends of the base plate 30 in the short direction are formed flat. Note that the base plate 30 is formed so that the central part that supports the light source module 1 protrudes above the ends, but the central part may be formed so that it protrudes below the ends. Alternatively, the entire base plate 30 may be formed flat.

[0108] Furthermore, a portion of the extension 53 (the portion other than the portion adjacent to the through hole 32) may be in contact with the lower surface of the substrate 11. In this case, the substrate 11 can be supported by a portion of the extension 53, eliminating the need for multiple claws 301 provided on the bottom plate 30, thereby reducing manufacturing costs.

[0109] (3-5) Modification 5 The lighting fixture A1 of Modified Example 5 is characterized by the provision of a reflective member on the substrate 11 of the light source module 1. Specifically, the substrate 11 in Modified Example 5 is made of a flexible printed circuit board using a flexible synthetic resin film as an insulating substrate. The substrate 11 has a long rectangular mounting section 110 and a pair of reflective sections 111 provided at both ends of the mounting section 110 in the short direction (see Figure 19). The mounting section 110 and the pair of reflective sections 111 are integrally formed by an insulating film made of a flexible and electrically insulating material such as polyimide.

[0110] The mounting section 110 has a large number of LEDs 10 mounted in the center in the short direction. The pair of reflective sections 111 are formed in a rectangular shape and are bent diagonally downward from both ends in the short direction of the mounting section 110. That is, each surface (bottom surface) of the pair of reflective sections 111 corresponds to a reflective surface.

[0111] Here, a through-hole 112 is provided in the mounting section 110 at a position opposite to the through-hole 32 in the bottom plate 30 (see Figure 19). In other words, the infrared signal transmitted from the remote controller 7 is received by the light receiving section 40 through the through-hole 112 in the mounting section 110 and the through-hole 32 in the bottom plate 30.

[0112] In the modified example 5, the lighting fixture A1 has a reflective member on the substrate 11 of the light source module 1, which allows for a reduction in manufacturing costs by reducing the number of parts.

[0113] (3-6) Modification 6 The lighting fixture A1 of Modification 6 is characterized by the shape of its cover 5. Specifically, the cover 5 in Modification 6 is formed in the shape of a long, rectangular trough with an open top (see Figure 20). In addition, in the lighting fixture A1 of Modification 6, the fixture body 6 and the support member 3 are integrally formed from a metal material (for example, aluminum or aluminum alloy).

[0114] The cover 5 has a bottom plate portion 500 that faces the substrate 11 of the light source module 1 in the vertical direction, and a pair of side plate portions 501 that rise upward from both ends of the bottom plate portion 500 in the short direction (left-right direction in Figure 20). The bottom plate portion 500 and the pair of side plate portions 501 are integrally formed from a light-transmitting synthetic resin such as acrylic resin or polycarbonate resin.

[0115] The base plate portion 500 is formed in the shape of a rectangular flat plate. The base plate portion 500 is transparent or diffusive.

[0116] The pair of side plates 501 are formed in a rectangular, flat shape. The inner surfaces of the pair of side plates 501 have a higher reflectivity for visible light compared to the inner surface (top surface) of the bottom plate 500. In other words, in the lighting fixture A1 of the modified example 6, the pair of side plates 501 of the cover 5 correspond to reflective members, and the inner surfaces of the pair of side plates 501 correspond to reflective surfaces. The pair of side plates 501 may have a lower transmittance for visible light than the bottom plate 500, or they may be diffusive. However, the pair of side plates 501 may be formed from the same material as the bottom plate 500 and have the same transmittance and reflectivity as the bottom plate 500. Even if the pair of side plates 501 are formed from a light-transmitting material, a portion of the light from the light source module 1 that reaches the inner surface of the side plates 501 is reflected, so the light-transmitting side plates 501 also correspond to reflective members. The cover 5 is attached to the support member 3 (appliance body 6) by the extensions 53 provided at the upper ends of each side plate portion 501 being hooked onto a pair of side plates 31 of the support member 3.

[0117] A through-hole 32 is provided in the bottom plate 30 of the support member 3 between the light source module 1 and the extension 53. Therefore, the infrared signal transmitted from the remote controller 7 passes through the cover 5 and is received by the light receiving unit 40 through the through-hole 32 in the support member 3. In addition, a portion of the light emitted from the light source module 1 is reflected by the reflective surface (the inner surface of the side plate portion 501) and then passes through the bottom plate portion 500 to irradiate the outside.

[0118] The pair of side plates 501 may be formed in a V-shape as shown in Figure 21. Alternatively, the pair of side plates 501 may be inclined outward from the upper end to the lower end as shown in Figure 22.

[0119] However, in the modified example 6, the lighting fixture A1 has the reflective member integrated with the cover 5, thus reducing manufacturing costs by reducing the number of parts. In addition, in the modified example 6, the lighting fixture A1 has the reflective surface (the inner surface of the side plate portion 501) perpendicular to the first surface 30A of the bottom plate 30, so the illuminance directly below the fixture body 6 can be increased.

[0120] (3-7) Modification 7 The lighting fixture A1 in the modified example 7 is characterized by the fact that a reflective member is provided on the support member 3.

[0121] In the modified example 7, the support member 3 has a bottom plate 30 and a pair of side plates 31 bent downward from both ends of the bottom plate 30 in the short direction, with the pair of side plates 31 serving as reflective members (see Figure 23A). Preferably, the inner surfaces of each side plate 31 are coated with white paint, or a sheet material with a reflective surface, such as white tape (a so-called reflective sheet), is attached to them to create a highly reflective surface.

[0122] The cover 5 is attached to the front (lower end) of the pair of side plates 31 (see Figure 23A). Alternatively, the cover 5 may be attached to the first surface 30A of the bottom plate 30 (see Figure 23B). Note that the shape of the cover 5 is not limited to the illustrated example and may be any shape, such as a flat plate or a box.

[0123] Furthermore, the pair of side plates 31 may be inclined outward as they move away from the bottom plate 30 (see Figure 23C). In addition, a pair of second side plates 310 may be provided that protrude upward from the tips (lower ends) of the pair of side plates 31 (see Figure 23D). The pair of second side plates 310 can improve the mechanical strength of the support member 3. In each support member 3, the bottom plate 30 is provided with a through hole 32 for allowing infrared signals to pass through, and an insulating member 36 that closes the through hole 32.

[0124] Alternatively, the support member 3 may have a pair of second side plates 310 that protrude inward from the tips (lower ends) of the pair of side plates 31 (see Figure 24A). In this case, the pair of second side plates 310 become reflective members, and the inner surfaces of each second side plate 310 become reflective surfaces.

[0125] However, the lighting fixture A1 of Modified Example 7 can reduce manufacturing costs by reducing the number of parts by providing a reflective member on the support member 3. Furthermore, the lighting fixture A1 of Modified Example 7 uses a pair of side plates 31 of the support member 3 as reflective members, and by forming the reflective members integrally with the support member 3, further reductions in manufacturing costs and improvements in the workability of assembly can be achieved.

[0126] Furthermore, when a pair of side plates 31 are used as reflective members, each side plate 31 may be formed in a V-shape (see Figure 24B).

[0127] (3-8) Variation 8 The lighting fixture A1 of the modified example 8 is characterized in that the pair of reflectors 61 of the fixture body 6 are used as reflective members.

[0128] In the modified example 8, the main body 6 of the device comprises a rectangular box-shaped housing 60 with an open bottom, and a pair of reflectors 61 that protrude diagonally downward from the open edges on both sides along the longitudinal direction of the housing 60 (see Figure 25). A through hole 32 and an insulating member 36 are provided in the area between the reflectors 61 and the light source module 1 in the bottom plate 30. Although not shown in Figure 25, the first surface 30A of the bottom plate 30 of the support member 3 housed in the housing 60 is covered with a cover.

[0129] In the modified example 8, the lighting fixture A1 can reduce the number of parts by using the reflector 61 of the fixture body 6 as a reflective member.

[0130] (3-9) Modification 9 The lighting fixture A1 of the modified example 9 is characterized by the structure of the short-side ends of the support member 3, which include a pair of side plates 31.

[0131] In the modified example 9, both ends of the support member 3 in the short direction (hereinafter sometimes simply referred to as "ends of the support member 3") have an L-shaped projection 34 and a side plate 31 that protrudes upward from the tip of the projection 34 (see Figure 26A). The tip (upper end) of the side plate 31 is located at approximately the same height as the second surface 30B of the side plate 31 in the thickness direction (vertical direction) of the bottom plate 30. Alternatively, the tip of the projection 34 may be hemmed (see Figure 26B) or curled. When the tip of the projection 34 is hemmed or curled, it may be bent towards the upper surface of the projection 34 (see Figure 26B) or towards the lower surface of the projection 34. Furthermore, the bottom plate of the projection 34 may be formed to incline upward outward (see Figure 26C). Alternatively, the bottom 340 of the projection 34 may be formed to slope downward outward (see Figure 27A).

[0132] Furthermore, the projection 34 may be formed in a V-shape (see Figures 27B and 27C). In addition, the projection 34 may be formed in a semi-cylindrical shape (see Figure 27D). Alternatively, at least one of the inner side portion 341 and the outer side portion 342 of the projection 34 may be formed to be inclined with respect to the thickness direction (vertical direction) of the base plate 30 (see Figures 28A-28C).

[0133] Furthermore, the inner side portion 341 of the projection 34 may be formed in a stepped shape (see Figures 29A and 29B). In this case, the upper end of the outer side portion 342 may be at a higher position than the second surface 30B of the base plate 30 (see Figure 29A), or at approximately the same height as the second surface 30B (see Figure 29B).

[0134] Furthermore, the inner side portion 341 of the projection 34 may be formed in a stepped shape, and the outer side portion 342 may be hemmed (see Figure 30A). Alternatively, the projection 34 may be formed in a trough shape, and the upper end of the outer side portion 342 may be formed to protrude outward (see Figure 30B). The outer side portion 342 may also be formed in a stepped shape (see Figure 30C).

[0135] Furthermore, the projection 34 may be formed such that at least one of the bottom portion 340, the inner side portion 341, and the outer side portion 342 is inclined (see Figures 31A-31D).

[0136] Alternatively, beads 302 may be provided on the inside of the protrusions 34 on the bottom plate 30 of the support member 3 (see Figures 32A and 32B). The through hole 32 may be provided on the bottom surface of the bead 302. By providing beads 302 on the bottom plate 30 in this way, the strength of the support member 3 can be improved.

[0137] (3-10) Variation 10 The lighting fixture A2 of the modified example 10 is characterized in that the fixture body 6 is formed in a square shape when viewed from above, and multiple (three in the illustrated example) light source units B2 are attached to the lower surface of the fixture body 6 (see Figure 33).

[0138] In modified example 10, the fixture body 6 is installed so as to be directly attached to or embedded in the ceiling or wall.

[0139] The basic configuration of the three light source units B2 is the same. That is, the three light source units B2 all share a light source module 1, a support member 3, and a cover 5. In addition, one of the light source units B2 further includes an infrared module 4 (see Figure 34A). However, two or three of the light source units B2 may each have an infrared module 4.

[0140] The support member 3 is configured such that a pair of side plates 31 protrude from both ends of the short side of a flat base plate 30. The pair of side plates 31 are formed in a V-shape when viewed from the longitudinal direction. The light source module 1 is attached to the lower surface (first surface 30A) of the base plate 30. A through hole 32 and an insulating member 36 are provided in the area between the light source module 1 and one of the side plates 31 (the right side in Figure 34A). The light receiving part 40 of the infrared module 4 is positioned above the through hole 32.

[0141] In the modified example 10, the lighting fixture A2 uses a pair of side plates 31 of the support member 3 as reflective members, similar to the modified example 6. The pair of side plates 31 are formed in a V-shape when viewed from the longitudinal direction, but they may also be formed in a flat shape (see Figure 34B). Furthermore, it is preferable that the inner surfaces of each side plate 31 be made into highly reflective surfaces by applying white paint or attaching white tape. The cover 5 is formed in a flat shape and is attached to the tips (lower ends) of the pair of side plates 31.

[0142] However, in the lighting fixture A2 of the modified example 10, a reflective member may be provided on the cover 5 (see Figure 34C). For example, the cover 5 has a flat bottom plate portion 54 and a pair of side plate portions 55 that protrude downward and inward from both ends of the short side of the bottom plate portion 54. The bottom plate portion 54 and the pair of side plate portions 55 are integrally formed from a light-transmitting synthetic resin such as acrylic resin or polycarbonate resin.

[0143] The bottom plate portion 54 is transparent or diffusive. The inner surfaces of the pair of side plates 55 have a higher reflectivity to visible light compared to the inner surface (top surface) of the bottom plate portion 54. In other words, the inner surfaces of the pair of side plates 55 correspond to the reflective surfaces. The pair of side plates 55 may have a lower transmittance to visible light than the bottom plate portion 54, or they may be diffusive.

[0144] In the lighting fixture A2 of the modified example 10, the infrared signal transmitted from the remote controller 7 passes through the cover 5 and is then received by the light receiving unit 40 through the through-hole 32 of the support member 3 and the insulating member 36. In addition, a portion of the light emitted from the light source module 1 is reflected off a reflective surface (the inner surfaces of the pair of side plates 31 of the support member 3 or the pair of side plate portions 55 of the cover 5) before being irradiated to the outside.

[0145] (3-11) Variation 11 The lighting fixture A3 of the modified example 11 is characterized in that the fixture body 6 is formed in the shape of a long box, and multiple (two in the illustrated example) light source units B3 are housed inside the fixture body 6 (see Figure 35).

[0146] In modified example 11, the fixture body 6 is installed so as to be embedded in the ceiling or wall. Two light source units B3 are housed inside the fixture body 6.

[0147] The two light source units B3 share a single support member 3. The support member 3 has a base plate 30 and a pair of side plates 31 that protrude upward from both ends of the base plate 30 in the short direction (left-right direction in Figure 35). The light source modules 1 and covers 5 of the two light source units B3 are attached to the first surface 30A of the base plate 30 with a gap between them. A through hole 32 is provided in the center of the base plate 30 in the short direction, sandwiched between the two covers 5. The light receiving section 40 of the infrared module 4 is positioned above the through hole 32. However, the case 43 of the infrared module 4 is not shown in Figure 35.

[0148] A portion of the light emitted from the two light source modules 1 passes through the cover 5 and is reflected off the sides of the fixture body 6 in the short direction, illuminating downwards. In other words, in the lighting fixture A3 of the modified example 11, the fixture body 6 corresponds to the reflective member, and the sides of the fixture body 6 correspond to the reflective surface.

[0149] (3-12) Variation 12 The lighting fixture A1 of the modified example 12 is characterized in that a void provided in the substrate 11 of the light source module 1 is positioned opposite the through hole 32 of the bottom plate 30 in the thickness direction (vertical direction) of the bottom plate 30.

[0150] The void provided in the substrate 11 is, for example, a notch 113 provided in the substrate 11. The notch 113 is preferably provided on the surface (bottom surface) of the substrate 11 in a location that avoids printed wiring, for example, at one end edge in the short direction of the substrate 11 (see Figure 36). However, the void may also be used in conjunction with a notch provided for other purposes, for example, a notch 113 provided at the short end of the substrate 11 to avoid a claw 301 cut out from the bottom plate 30 (see Figure 37).

[0151] Furthermore, the void is not limited to the notch 113. For example, the void may be a hole 114 that penetrates the substrate 11 in the thickness direction (vertical direction) (see Figure 38A). The location where the void (notch 113 and hole 114) is provided on the substrate 11 is as long as it can maintain a sufficient distance from the LEDs 10 mounted on the surface of the substrate 11 and the printed wiring on the surface of the substrate 11. For example, the location where the void is provided may be in the center of the substrate 11 in the short direction and between the LEDs 10 arranged along the longitudinal direction of the substrate 11. Also, the depth of the notch 113 (length along the short direction of the substrate 11) may be longer than the diameter of the through hole 32 (see Figure 36), or it may be shorter than the diameter of the through hole 32, with a part of the through hole 32 protruding outside the notch 113 (see Figure 37).

[0152] Furthermore, the tip of the extension 53 may be in contact with the surface (bottom surface) of the substrate 11 (see Figure 38B). In this case, at least a portion of the extension 53 may be formed from a different material (synthetic resin material) than the cover body 50 (two-color molding). For example, the entire extension 53 may be filled with filler to form a white color, while the cover body 50 may be filled with a smaller amount of filler than the extension 53, or filled with a different filler to form a milky white color.

[0153] Furthermore, the tip of the main piece 530 of the extension 53 may be in contact with the surface (bottom surface) of the substrate 11, and a side piece 532 may be provided that protrudes from the main piece 530 toward the bottom plate 30 (see Figure 39). In this case, the tip of the side piece 532 may or may not be in contact with the first surface 30A of the bottom plate 30. When the tip of the side piece 532 is in contact with the first surface 30A of the bottom plate 30, there is the advantage that the intrusion of foreign matter can be suppressed.

[0154] In the modified example 12 lighting fixture A1, the void (notch 113) in the substrate 11 is positioned opposite the through hole 32 in the bottom plate 30 in the vertical direction, thus reducing the distance between the extension 53 and the substrate 11. Therefore, in the modified example 12 lighting fixture A1, for example, the tip of the extension 53 can be brought into contact with the surface (bottom surface) of the substrate 11, and the substrate 11 can be supported by the extension 53. Furthermore, in the modified example 12 lighting fixture A1, by supporting the substrate 11 with the extension 53, it becomes unnecessary to provide multiple claws 301 on the support member 3, thus reducing manufacturing costs.

[0155] Here, a cylindrical portion 33 may be provided around the through hole 32 on the first surface 30A of the base plate 30. The cylindrical portion 33 may, for example, be formed in a cylindrical shape and inserted into the hole 114 of the substrate 11 (see Figure 40A). Alternatively, the cylindrical portion 33 may be formed in a frustoconical shape (see Figure 40B). Furthermore, a circular hole 330 may be provided on the bottom surface of the cylindrical cylindrical portion 33 (see Figure 40C). The cylindrical portion 33 may also be provided around the through hole 32 on the second surface 30B of the base plate 30 (see Figure 40D). These various types of cylindrical portions 33 can be formed by burring, drawing, or die forming on a support member 3 made of a metal plate. Furthermore, the cylindrical portion 33 may be provided in a position that does not overlap with the substrate 11 when viewed from the thickness direction (vertical direction) of the base plate 30.

[0156] However, by providing a cylindrical portion 33 around the through hole 32 on the first surface 30A or the second surface 30B of the base plate 30, ambient light such as light emitted from the light source module 1 is less likely to pass through the through hole 32. Therefore, the lighting fixture A1 of the modified example 12 can improve light reception sensitivity by suppressing the reception of ambient light by the light receiving unit 40. Moreover, the lighting fixture A1 of the modified example 12 can further improve the light reception sensitivity of the light receiving unit 40 by reflecting infrared signals with the inner surface of the cylindrical portion 33.

[0157] Incidentally, the size (diameter) of the hole 114 in the substrate 11 may be the same as the size (diameter) of the through hole 32 in the base plate 30, but it may also be different. For example, if the size of the hole 114 in the substrate 11 is larger than the size of the through hole 32 in the base plate 30 (see Figure 41A), the angle of the infrared signal L1 that can pass through the through hole 32 in the base plate 30 (the angle of inclination of the base plate 30 with respect to the thickness direction) can be made relatively narrower. Therefore, in this case, there is an advantage that remote control by the remote controller 7 becomes easier in places where the height from the floor to the lighting fixture A1 is considerably high, such as factories and logistics warehouses.

[0158] On the other hand, when the size of the holes 114 in the circuit board 11 is smaller than the size of the through-holes 32 in the base plate 30 (see Figure 41B), there is the advantage that it is easier to secure the insulation distance between the holes 114 in the circuit board 11 and the printed circuit board 11. Moreover, since the circuit board 11 can transmit infrared signals to some extent compared to the metal base plate 30, the angle of the infrared signal L1 that can pass through the through-holes 32 in the base plate 30 can be increased compared to when the size of the holes 114 in the circuit board 11 is larger than the size of the through-holes 32 in the base plate 30. Therefore, in this case, the remote controller 7 can be operated from diagonally below the lighting fixture A1 to remotely control the lighting fixture A1 in a place where the height from the floor to the lighting fixture A1 is not high, such as in a typical office, and is suitable for situations where multiple lighting fixtures A1 are installed on the ceiling.

[0159] Furthermore, the size of the through-hole 32 in the base plate 30 may be the same as, or different from, the size (diameter) of the opening 44 in the case 43 that houses the light-receiving unit 40. For example, if the size of the through-hole 32 in the base plate 30 is smaller than the size of the opening 44 in the case 43 (see Figure 41C), the angle of the infrared signal L1 that can pass through the through-hole 32 in the base plate 30 can be made relatively narrower. Therefore, in this case, there is an advantage that remote control by the remote controller 7 becomes easier in places where the height from the floor to the lighting fixture A1 is considerably high, such as factories and logistics warehouses.

[0160] On the other hand, if the size of the through-hole 32 in the base plate 30 is larger than the size of the opening 44 in the case 43 (see Figure 41D), the synthetic resin case 43 can transmit infrared signals to some extent compared to the metal base plate 30. Therefore, the angle of the infrared signal L1 that can pass through the opening 44 of the case 43 can be increased compared to the case where the size of the opening 44 in the case 43 is larger than the size of the through-hole 32 in the base plate 30. Thus, in this case, the lighting fixture A1 can be remotely controlled by operating the remote controller 7 from diagonally below the lighting fixture A1, in a place where the height from the floor to the lighting fixture A1 is not high, such as in a typical office, and is suitable for situations where multiple lighting fixtures A1 are installed on the ceiling.

[0161] (3-13) Variation 13 The lighting fixture A1 of the modified example 13 has a component 35 that is fitted into a through hole 32 in the base plate 30 (see Figures 42A-42D).

[0162] Component 35 is made of, for example, synthetic resin. Component 35 has a cylindrical body 350 inserted through the through hole 32, a flange portion 351 provided at one axial end (upper end) of the body 350, and a hook portion 352 provided at the other axial end (lower end) of the body 350 (see Figure 42A). The insulating member 36 is attached to the upper surface of the body 350.

[0163] Component 35 is attached to the base plate 30 by inserting the main body 350 through the through hole 32 and hooking the hook portion 352 around the through hole 32 on the first surface 30A of the base plate 30. Since the outer diameter of the flange portion 351 is larger than the diameter of the through hole 32, component 35 will not slip out onto the first surface 30A of the base plate 30.

[0164] However, in the modified example 13, the lighting fixture A1 can adjust the range over which the infrared signal passes from the first surface 30A to the second surface 30B of the base plate 30 by using a component 35 that is fitted into the through hole 32. In other words, since the hole diameter of the main body 350 of the component 35 is smaller than the diameter of the through hole 32, the angle of the infrared signal that can pass through the hole in the main body 350 (the angle of inclination with respect to the thickness direction of the base plate 30) becomes relatively narrower. Therefore, in this case, there is an advantage that remote control by a remote controller becomes easier in places where the height from the floor to the lighting fixture A1 is considerably high, such as factories and logistics warehouses.

[0165] Furthermore, part 35 may have a membrane portion 353 that closes the opening at the lower end of the main body 350 (see Figure 42B). The membrane portion 353 is formed integrally with the main body 350 from the same synthetic resin as the main body 350. However, the membrane portion 353 is formed to a thickness that allows infrared signals to pass through. The lighting fixture A1 of the modified example 13 can prevent the entry of foreign objects such as insects by closing the opening at the lower end of the main body 350 with a membrane portion 353 that allows infrared signals to pass through.

[0166] Note that part 35 does not necessarily have to have a hook portion 352 (see Figure 42C). In this case, it is preferable that part 35 be fixed to the base plate 30 by an appropriate method such as adhesive.

[0167] Furthermore, the main body 350 of part 35 may protrude above the flange portion 351 (see Figure 42D). In the modified example 13, the lighting fixture A1 can improve the reception sensitivity of infrared signals in the light receiving unit 40 by having the main body 350 protrude above the flange portion 351.

[0168] Here, part 35 may be formed in white by filling it with a filler that reflects visible light. Alternatively, part 35 may be formed in black by filling it with a filler that absorbs visible light.

[0169] When component 35 is formed in white, the lighting fixture A1 of the modified example 13 can improve the reception sensitivity of infrared signals in the light receiving section 40 by reflecting infrared signals from the inner surface of the main body 350.

[0170] On the other hand, when the component 35 is formed in black, the lighting fixture A1 of the modified example 13 can relatively narrow the angle at which infrared signals can pass through the main body 350 by absorbing infrared signals with the inner surface of the main body 350. Therefore, in this case, there is an advantage that remote control by the remote controller 7 becomes easier in places where the height from the floor to the lighting fixture A1 is considerably high, such as factories and logistics warehouses.

[0171] (3-14) Modification 14 The lighting fixture A1 of the modified example 14 is characterized in that the holes 114 in the substrate 11 of the lighting fixture A1 of the modified example 11 are formed as plated through-holes.

[0172] In modified example 14, the hole 114 is formed as a plated through-hole plated with a conductor (copper foil 1140) for printed circuit boards (see Figure 43). The hole 114 may be a plated through-hole with a land, as shown in the illustrated example, but it may also be a plated through-hole without a land. Furthermore, the plated through-hole used as the hole 141 for passing infrared signals may also be used as a plated through-hole for printed circuit boards formed on the substrate 11.

[0173] However, in the modified example 14, the lighting fixture A1 has holes 114 in the substrate 11 formed by plated through-holes, which allows the angle at which infrared signals can pass through the holes 114 to be relatively narrowed. Therefore, in this case, there is an advantage in that remote control by the remote controller 7 is easier to perform in places where the height from the floor to the lighting fixture A1 is considerably high, such as factories and logistics warehouses.

[0174] (3-15) Variation 15 The lighting fixture A1 of the modified example 15 is characterized by the shape, size, number, and arrangement of the through holes 32 provided in the base plate 30.

[0175] For example, the through-hole 32 may be formed in a rectangular shape (see Figures 44A-44C). It is preferable that the rectangular through-hole 32 be formed to be larger than the light-receiving section 40 (see Figures 44A and 44B). Alternatively, the rectangular through-hole 32 may be formed such that its width in the shorter direction is narrower than the width of the light-receiving section 40 (see Figure 44C).

[0176] Furthermore, multiple circular through-holes 32 may be provided (see Figure 44D). For example, three through-holes 32 may be arranged in a row, and the light-receiving unit 40 may be positioned to face the central through-hole 32 (see Figure 44D). However, the through-hole 32 facing the light-receiving unit 40 is not limited to the central through-hole 32, but may be any of the through-holes 32 at either end. Also, the light-receiving unit 40 may be positioned so as to overlap with a portion of the through-holes 32 when viewed from the thickness direction of the base plate 30.

[0177] The through-hole 32 in the base plate 30 may be provided in a position that does not overlap with the light-receiving unit 40 when viewed from the thickness direction of the base plate 30 (see Figures 45A and 45B). The through-hole 32 may be formed in a rectangular shape (see Figure 45A) or a circular shape (see Figure 45B). Also, there may be one through-hole 32 (see Figure 45A) or multiple through-holes (see Figure 45B). In this case, infrared signals transmitted from directly below the lighting fixture A1 will be less likely to be received by the light-receiving unit 40, but infrared signals transmitted from diagonally below the lighting fixture A1 will be more likely to be received by the light-receiving unit 40.

[0178] (3-16) Variation 16 The lighting fixture A1 of the modified example 16 is characterized by a through hole 32 provided in the base plate 30.

[0179] The bottom plate 30 of the support member 3 has holes (cut-out holes 303) for cutting out multiple claws 301. In the lighting fixture A1 of the modified example 16, a portion of one of the cut-out holes 303 in the bottom plate 30 is used as a through hole 32 (see Figure 46A). In the modified example 16, the through hole 32 corresponds to the portion of the cut-out hole 303 that overlaps with the notch 114 of the substrate 11. Alternatively, instead of using a portion of the cut-out hole 303 as a through hole 32, the through hole 32 may be formed to connect with the cut-out hole 303 (see Figure 46B).

[0180] Here, even the cut-out holes 303 that are not used in part as through-holes 32 need to be sealed with tape to prevent foreign matter from entering. In other words, in the lighting fixture A1 of the modified example 16, not only are some of the cut-out holes 303 provided in the support member 3 used in part as through-holes 32, but the tape used to seal the cut-out holes 303 can also be used on the insulating member 36.

[0181] However, in the modified example 16, the lighting fixture A1 utilizes a portion of the cut-out hole 303 provided in the base plate 30 as a through hole 32, or forms the through hole 32 so as to connect with the cut-out hole 303, thereby providing the claws 301 and the through hole 32 together. As a result, the lighting fixture A1 of the modified example 16 can reduce the number of manufacturing steps. Furthermore, by covering the cut-out hole 303 with an insulating member 36, the lighting fixture A1 of the modified example 16 can reduce the number of parts and work steps compared to the case where the cut-out hole 303 is covered with tape or something similar separate from the insulating member 36.

[0182] (3-17) Variation 17 In the modified example 17, the lighting fixture A1 has a through hole 32 in the area (bottom plate 30) that overlaps with the extension 53 of the cover 5 when viewed from the thickness direction (vertical direction) of the bottom plate 30. In addition, the lighting fixture A1 of the modified example 17 has a hole 534 in the extension 53 that overlaps with at least a part of the through hole 32 in the vertical direction (see Figure 47).

[0183] Furthermore, in the modified example 17, the lighting fixture A1 has a hole 534 in the extension 53 that could be a route for foreign matter to enter, which is sealed with an insulating member 36.

[0184] It is preferable that the insulating member 36 be attached to the upper surface of the extension portion 53 (the surface facing the bottom plate 30) (see Figure 47). However, if the visible light reflectance on the surface of the insulating member 36 is high, the insulating member 36 may be attached to the lower surface of the extension portion 53 (the surface facing the cover body 50).

[0185] Furthermore, if there is a gap between the tip of the extension 53 and the base plate 30, it is desirable to seal the through hole 32 in the base plate 30 with an insulating member 36 (see Figure 48).

[0186] The through hole 32 may also be provided in the projection 34 of the support member 3 (see Figure 49). In this case, the hole 534 of the extension 53 is provided in a position opposite to the projection 34. It is desirable that the insulating member 36 be attached to the upper surface of the projection 34 to close the hole 534. However, the insulating member 36 may be attached to the lower surface of the projection 34, the upper surface of the extension 53, or the lower surface.

[0187] (3-18) Variation 18 The lighting fixture A1 of the modified example 18 is characterized by having a through hole 32 in the region sandwiched between multiple substrates 11.

[0188] In the lighting fixture A1 of the modified example 18, a through hole 32 is provided in the region sandwiched between two substrates 11 aligned along the longitudinal direction of the support member 3, and the through hole penetrates the bottom plate 30 (see Figure 50).

[0189] Furthermore, the voids in the modified example 18 are semicircular notches 113 provided at the ends of the two substrates 11 that are adjacent to each other in the longitudinal direction of the two substrates 11 (see Figure 50). Note that the notches 113 of the two substrates 11 are adjacent to each other along the longitudinal direction of the substrates 11.

[0190] However, in the modified example 18, the lighting fixture A1 has a through hole 32 in the area sandwiched between the two substrates 11 in the bottom plate 30 of the support member 3. This allows for an increase in the total area of ​​the combined space of the two notches 113 while suppressing an increase in the area occupied by the voids (notches 113) in each substrate 11. Therefore, the lighting fixture A1 of the modified example 18 can expand the range in which infrared signals can be received while ensuring the insulation distance between the printed wiring and the voids in each substrate 11. However, the insulating member is not shown in Figure 50.

[0191] (3-19) Variation 19 The lighting fixture A4 of the modified example 19 comprises a fixture body (not shown) formed in a square shape in plan view, and a light source unit B4 that is detachably attached to the fixture body (see Figure 51). The fixture body is installed so as to be directly attached to or embedded in the ceiling or wall.

[0192] The light source unit B4 comprises a support member 3 and a plurality (four in the illustrated example) of light source modules 1 supported by the support member 3. The light source unit B4 also has a cover (not shown) attached to the support member 3 that covers the four light source modules 1 from below.

[0193] In modified example 19, the support member 3 is formed in the shape of a square box with an open bottom, comprising a square bottom plate 30 and four side plates 31 that protrude downward from each of the four sides of the bottom plate 30. A circular through hole 32 is provided in the center of the bottom plate 30. This through hole 32 faces the light-receiving part of an infrared module (not shown) positioned above the support member 3.

[0194] Each of the four light source modules 1 is configured by mounting multiple LEDs 10 on the surface (bottom surface) of a square-shaped substrate 11 so that they are arranged vertically and horizontally at equal intervals. These four light source modules 1 are supported on the first surface 30A of the bottom plate 30 of the support member 3 so that they are arranged in two rows vertically and horizontally (see Figure 51). The four light source modules 1 may also include a lens unit (not shown) having multiple lenses facing the multiple LEDs 10. The lens unit is configured so that each of the multiple lenses focuses or diffuses the light emitted from the LEDs 10.

[0195] In each light source module 1, an arc-shaped notch 113 (void) is provided at one corner of the substrate 11 surrounding the through hole 32 of the support member 3. However, the notch 113 does not need to be provided in all four light source modules 1 (substrates 11). For example, the notch 113 may be provided only in two substrates 11 adjacent to one side of the base plate 30 parallel to each other. In this case, it is desirable that the notch 113 be provided in the center of the adjacent sides of the two substrates 11 (see Figure 52A). Alternatively, instead of the notch 113, a hole 114 (void) passing through one substrate 11 may be provided (see Figure 52B).

[0196] In the lighting fixture A4 of the modified example 19, the infrared signal transmitted from the remote controller 7 passes through the cover and is received by the light receiving unit through the through-hole 32 of the support member 3 via the cavity (notch 113) in the substrate 11. However, the insulating member is not shown in Figures 51 to 52B.

[0197] Furthermore, in the embodiments and modifications described above, a receiving unit for receiving wireless signals using radio waves as a medium may be provided instead of a light receiving unit.

[0198] (4) Summary A lighting fixture (A1; A2; A3; A4) according to a first aspect of this disclosure comprises a support member (3), a light source (light source module 1), a light receiving unit (40), and a case (43). The support member (3) has a first surface (30A) and a second surface (30B) opposite to the first surface (30A). The light source is supported by the support member (3) on the side of the first surface (30A). The light receiving unit (40) is positioned on the side of the second surface (30B) of the support member (3). The case (43) houses the light receiving unit (40). The support member (3) has a through hole (32) that penetrates from the first surface (30A) to the second surface (30B). The light receiving unit (40) faces the through hole (32). At least a portion of the case (43) is permeable to the electromagnetic waves received by the light-receiving unit (40).

[0199] The lighting fixtures (A1; A2; A3; A4) according to the first embodiment can improve the light receiving sensitivity at the light receiving section (40) by suppressing the attenuation of the light signal until it passes through the through hole (32) of the support member (3).

[0200] Lighting fixtures (A1; A2; A3; A4) according to a second aspect of this disclosure can be realized by combining with the first aspect. In the lighting fixtures (A1; A2; A3; A4) according to the second aspect, the case (43) preferably has a first portion (437) and a second portion (bottom wall 430). The first portion (437) preferably has a relatively high transmittance of electromagnetic waves. The second portion preferably has a lower transmittance than the first portion (437). The light-receiving portion (40) preferably faces the through hole (32) via the first portion (437).

[0201] The lighting fixture (A1; A2; A3; A4) according to the second embodiment can further improve the light-receiving sensitivity of the light-receiving part (40) by suppressing unwanted electromagnetic waves from reaching the light-receiving part (40) through the second part, which has lower transmittance than the first part (437).

[0202] Lighting fixtures (A1; A2; A3; A4) according to a third aspect of this disclosure can be realized by combining with the second aspect. In the lighting fixtures (A1; A2; A3; A4) according to the third aspect, it is preferable that the first part (437) and the second part are formed of different materials.

[0203] The lighting fixture (A1; A2; A3; A4) according to the third embodiment has the advantage that the difference in transmittance between the first part (437) and the second part can be made large because the first part (437) and the second part are formed from different materials.

[0204] A lighting fixture (A1; A2; A3; A4) according to a fourth aspect of this disclosure can be realized by combining it with a second aspect. In a lighting fixture (A1; A2; A3; A4) according to a fourth aspect, it is preferable that the first part (437) and the second part are formed from the same material. It is preferable that the first part (437) has a smaller thickness dimension than the second part.

[0205] The lighting fixtures (A1; A2; A3; A4) according to the fourth embodiment reduce the thickness dimension so that the transmittance of the first part (437) is smaller than that of the second part, thereby suppressing the increase in cost required to install the first part (437) in the case (43).

[0206] A fifth embodiment of the present disclosure (A1; A2; A3; A4) can be realized in combination with any of the first to fourth embodiments. In the fifth embodiment of the present disclosure (A1; A2; A3; A4), the case (43) preferably further has ribs (442) that surround the first portion (437) and are in contact with the periphery of the through hole (32) on the second surface (30B).

[0207] The lighting fixtures (A1; A2; A3; A4) according to the fifth embodiment can prevent foreign matter from entering through the through hole (32) by blocking the through hole (32) with the first part (437) and the rib (442).

[0208] A lighting fixture (A1; A2; A3; A4) according to the sixth aspect of this disclosure can be realized in combination with any of the first to fourth aspects. In the lighting fixture (A1; A2; A3; A4) according to the sixth aspect, the case (43) preferably further has a cylindrical peripheral wall portion (440) that protrudes from around the first portion (437) toward the light-receiving portion (40).

[0209] The lighting fixtures (A1; A2; A3; A4) according to the sixth embodiment can reflect electromagnetic waves off the inner surface of the peripheral wall portion (440) and have them received by the light receiving portion (40), thereby expanding the range of reception of the light receiving portion (40).

[0210] The lighting fixtures (A1; A2; A3; A4) according to the seventh aspect of this disclosure can be realized by combining them with the sixth aspect. In the lighting fixtures (A1; A2; A3; A4) according to the seventh aspect, it is preferable that the tip portion of the peripheral wall portion (440) surrounds the light receiving portion (40).

[0211] The lighting fixtures (A1; A2; A3; A4) according to the seventh embodiment can further improve the receiving sensitivity of the light-receiving part (40) by surrounding the light-receiving part (40) with the tip portion of the peripheral wall (440).

[0212] Lighting fixtures (A1; A2; A3; A4) according to the eighth aspect of this disclosure can be realized by combining with the sixth aspect. In the lighting fixtures (A1; A2; A3; A4) according to the eighth aspect, it is preferable that the tip portion of the peripheral wall (440) tapers as it approaches the light-receiving portion (40).

[0213] The lighting fixtures (A1; A2; A3; A4) according to the eighth embodiment can further improve the receiving sensitivity of the light receiving section (40) by tapering the tip of the peripheral wall portion (440).

[0214] A lighting fixture (A1; A2; A3; A4) according to the ninth aspect of this disclosure can be realized in combination with any of the first to eighth aspects. Preferably, the lighting fixture (A1; A2; A3; A4) according to the ninth aspect further comprises a power supply device (20) that supplies power to a light source to light it up, and a power supply case (21) that houses the power supply device (20). Preferably, the case (43) is attached to the power supply case (21).

[0215] The lighting fixtures (A1; A2; A3; A4) according to the ninth embodiment do not require a structure for attaching the case (43) to the support member (3), thus reducing the number of parts and the assembly process.

[0216] Lighting fixtures (A1; A2; A3; A4) according to the tenth aspect of this disclosure can be realized in combination with any of the first to eighth aspects. In the lighting fixtures (A1; A2; A3; A4) according to the tenth aspect, the case (43) is preferably attached to the support member (3).

[0217] The lighting fixtures according to the tenth embodiment (A1; A2; A3; A4) allow for greater flexibility in the placement of the light receiving unit (40) by attaching the case (43) to the support member (3).

[0218] A lighting fixture (A1; A2; A3; A4) according to the eleventh aspect of this disclosure can be realized in combination with any of the first to tenth aspects. Preferably, the lighting fixture (A1; A2; A3; A4) according to the eleventh aspect further comprises a power supply device (20) that supplies power to a light source to light it up, and a power supply case (21) that houses the power supply device (20). Preferably, the case is formed integrally with the power supply case (21).

[0219] The lighting fixtures (A1; A2; A3; A4) according to the 11th embodiment can reduce the number of parts and the assembly process by having the case integrally formed with the power supply case (21).

[0220] A lighting fixture (A1; A2; A3; A4) according to the twelfth aspect of this disclosure can be realized in combination with any of the first to eleventh aspects. In the lighting fixture (A1; A2; A3; A4) according to the twelfth aspect, the light source preferably has one or more light-emitting elements (LEDs 10) and a substrate (11) on which the light-emitting elements are mounted. The support member (3) preferably has a through hole (32) in part of the cut-out hole (303) after the claws (301) for supporting the substrate (11) have been cut-out.

[0221] In the lighting fixture according to the twelfth embodiment (A1; A2; A3; A4), a portion of the cut-out hole (303) provided in the support member (3) is made into a through hole (32), thereby allowing the claws (301) and through holes (32) to be provided together. As a result, the lighting fixture according to the fourth embodiment (A1; A2; A3; A4) can reduce the number of manufacturing steps.

[0222] A lighting fixture (A1; A2; A3; A4) according to the thirteenth aspect of this disclosure can be realized in combination with any of the first to twelfth aspects. In the lighting fixture (A1; A2; A3; A4) according to the thirteenth aspect, it is preferable to further include a cover (5) that covers the light source from a direction opposite to the first surface (30A).

[0223] The lighting fixtures according to the 13th embodiment (A1; A2; A3; A4) can be covered with a cover (5) to protect the light source and control the light distribution (e.g., diffusion) of the light emitted from the light source.

[0224] Lighting fixtures (A1; A2; A3; A4) according to the 14th aspect of this disclosure can be realized in combination with the 13th aspect. In the lighting fixtures (A1; A2; A3; A4) according to the 14th aspect, it is preferable that the cover (5) covers the through hole (32) from the direction facing the first surface (30A).

[0225] The 14th embodiment of the lighting fixture (A1; A2; A3; A4) can improve the light-receiving sensitivity of the light-receiving section (40) while protecting the light source with the cover (5).

[0226] A lighting fixture (A1; A2; A3; A4) according to the 15th aspect of this disclosure can be realized in combination with any of the 1st to 14th aspects. The lighting fixture (A1; A2; A3; A4) according to the 15th aspect preferably further comprises a power supply device (20) that supplies power to a light source to light it up. The power supply device (20) preferably adjusts the supply of power to the light source in accordance with the light signal received by the light receiving unit (40).

[0227] The lighting fixtures (A1; A2; A3; A4) according to the 15th embodiment allow for remote control of the power supply unit (20) by optical signals received by the light receiving unit (40).

[0228] Lighting fixtures (A1; A2; A3; A4) according to the 16th aspect of this disclosure can be realized in combination with the 15th aspect. In the lighting fixtures (A1; A2; A3; A4) according to the 16th aspect, the optical signal preferably uses infrared light as the medium.

[0229] The lighting fixtures according to the 16th embodiment (A1; A2; A3; A4) receive an optical signal using infrared light (infrared light) as a medium in the light receiving unit (40), and therefore, compared to the case where visible light is used as a medium, the accuracy of optical signal reception in the light receiving unit (40) can be improved.

[0230] A light source unit (B1; B2; B3; B4) according to the 17th aspect of this disclosure is used in a lighting fixture (A1; A2; A3; A4) according to any of the 1st to 16th aspects. Preferably, the light source unit (B1; B2; B3; B4) according to the 17th aspect comprises a support member (3), a light source, and a light receiving unit (40). The light source unit (B1; B2; B3; B4) according to the 17th aspect is detachably attached to a fixture body (6) which is attached to a building material.

[0231] The light source unit (B1; B2; B3; B4) according to the 17th embodiment can improve the light receiving sensitivity at the light receiving unit (40) by suppressing the attenuation of the light signal until it passes through the through hole (32) of the support member (3). [Explanation of Symbols]

[0232] A1;A2;A3;A4 Lighting equipment B1; B2; B3; B4 Light source unit 1. Light source module (light source) 3. Support member 5 Cover 6. Main body of the device 10 LEDs (light-emitting elements) 11 circuit boards 20 Power supply 21 Power Supply Cases 30A 1st side 30B 2nd side 32 through holes 40 Light receiving part 43 cases 301 Nail 303 Cutting hole 430 Lower wall (second part) 437 Part 1 440 Peripheral wall section 442 Rib

Claims

1. A support member having a first surface and a second surface opposite to the first surface, A light source supported by the support member on the first surface side, A light-receiving portion is positioned on the second surface side of the support member, A case for housing the light-receiving unit, Equipped with, The support member has a through hole that penetrates from the first surface to the second surface, The light-receiving part faces the through-hole, At least a portion of the case is capable of transmitting electromagnetic waves received by the light-receiving unit, The light source comprises one or more light-emitting elements and a substrate on which the light-emitting elements are mounted. The support member has a through hole formed in part of the cut-out hole after the claws for supporting the substrate have been cut and bent. Lighting fixtures.

2. The aforementioned case is, The first region, which has a relatively high transmittance of the aforementioned electromagnetic waves, A second portion whose transmittance is lower than that of the first portion, It has, The light-receiving portion faces the through-hole via the first portion, A lighting fixture according to claim 1.

3. The first part and the second part are formed from different materials. The lighting fixture according to claim 2.

4. The first and second portions are formed from the same material. The first part has a smaller thickness dimension than the second part. The lighting fixture according to claim 2.

5. The case further has ribs that surround the first portion and are in contact with the periphery of the through hole on the second surface. A lighting fixture according to any one of claims 2-4.

6. The case further has a cylindrical peripheral wall portion that protrudes from the periphery of the first portion toward the light-receiving portion. A lighting fixture according to any one of claims 2-4.

7. The tip portion of the peripheral wall surrounds the light receiving portion. The lighting fixture according to claim 6.

8. The tip portion of the peripheral wall tapers towards the light-receiving portion. The lighting fixture according to claim 6.

9. A power supply device that supplies power to the aforementioned light source to light it up, A power supply case for housing the aforementioned power supply unit, Furthermore, The aforementioned case is attached to the power supply case. A lighting fixture according to any one of claims 1 to 4.

10. The case is attached to the support member, A lighting fixture according to any one of claims 1 to 4.

11. A power supply device that supplies power to the aforementioned light source to light it up, A power supply case for housing the aforementioned power supply unit, Furthermore, The aforementioned case is formed integrally with the power supply case. A lighting fixture according to any one of claims 1 to 4.

12. The light source is further provided with a cover that covers the light source from a direction opposite to the first surface. A lighting fixture according to any one of claims 1 to 4.

13. The cover covers the through hole from a direction opposite to the first surface. The lighting fixture according to claim 12.

14. The power supply device further comprises supplying power to the light source to light it up, The power supply device adjusts the supply of power to the light source in accordance with the optical signal received by the light receiving unit. A lighting fixture according to any one of claims 1 to 4.

15. The optical signal uses infrared light as a medium. The lighting fixture according to claim 14.

16. A light source unit used in any of the lighting fixtures of Claims 1 to 4, The system comprises the support member, the light source, and the light receiving unit, It is detachably attached to the main body of the fixture which is attached to the building material. Light source unit.

Images