Lighting device

Abstract

To reduce defects of a light reception part due to infrared contained in light from a light source.SOLUTION: A lighting device includes a light source, an optical sensor 71, a light reception part, and a housing 8. The light source radiates light into lighting space. The optical sensor 71 includes a sensor part, and a lens 712 arranged between the sensor part and the lighting space. The light reception part receives an infrared light signal from an external device. The housing 8 includes a first opening part 811, and a second opening part 816 with a smaller opening area than the first opening part 811. The housing 8 accommodates the optical sensor 71 with exposing the lens 712 to the lighting space side through the first opening part 811, and accommodates the light reception part with opposing it to the second opening part. The light source, the optical sensor 71, and the light reception part are arranged along a first direction D1 with the order of the light source, the optical sensor 71, and the light reception part. The second opening part 816 is positioned between two outer edges 7123 and 7124 of the lens 712 in a second direction D2, in the second direction D2.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present disclosure generally relates to lighting devices, and more particularly to lighting devices provided with light sources.

Background Art

[0002] Patent Document 1 describes a lighting fixture including a circular main body and a light source disposed on the front side of the main body. In the lighting fixture described in Patent Document 1, a receiving unit is disposed on the front side of the main body. The receiving unit receives an infrared signal from a remote controller for lighting / extinguishing and dimming the light source.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the lighting fixture (lighting device) described in Patent Document 1, there is a possibility that problems such as malfunction of the receiving unit (light receiving unit) due to infrared rays contained in the light from the light source and the receiving unit being unable to normally receive an infrared signal from the remote controller may occur.

[0005] An object of the present disclosure is to provide a lighting device capable of reducing problems of the light receiving unit caused by infrared rays contained in the light from the light source.

Means for Solving the Problems

[0006] An illumination device according to one aspect of the present disclosure comprises a light source, an optical sensor, a light receiving unit, and a case. The light source irradiates light into an illumination space. The optical sensor has a sensor unit and a lens positioned between the sensor unit and the illumination space. The light receiving unit receives infrared signals from an external device. The case has a first opening and a second opening having a smaller opening area than the first opening. The case houses the optical sensor with the lens exposed to the illumination space side through the first opening, and houses the light receiving unit facing the second opening. The light source, the optical sensor, and the light receiving unit are arranged in the order of light source, optical sensor, and light receiving unit along a first direction. The second opening is located between the two outer edges of the lens in a second direction intersecting the first direction. In a plan view from the direction in which the second aperture and the light-receiving portion face each other, the aperture diameter of the second aperture is smaller than the outer shape of the light-receiving portion.

[0007] A lighting device according to another aspect of the present disclosure comprises a light source, a light-transmitting cover, an optical sensor, a light-receiving unit, and a case. The light source irradiates light into a lighting space. The cover is positioned between the light source and the lighting space. The optical sensor has a sensor portion and a lens positioned between the sensor portion and the lighting space. The light-receiving unit receives infrared signals from an external device. The case has a first opening and a second opening. The case houses the optical sensor with the lens exposed to the lighting space side through the first opening, and houses the light-receiving unit facing the second opening. The opening edge of the second opening opposite to the light-receiving unit side is positioned closer to the lighting space than the surface of the cover opposite to the light source side. The case further has a wall portion projecting from the opening edge of the first opening towards the lighting space side. In a plan view from the direction in which the second aperture and the light-receiving portion face each other, the aperture diameter of the second aperture is smaller than the outer shape of the light-receiving portion.

[0008] A lighting device according to another aspect of the present disclosure comprises a light source, an optical sensor, a light receiving unit, a case, and a light-blocking wall. The light source irradiates light into a lighting space. The optical sensor has a sensor portion and a lens positioned between the sensor portion and the lighting space. The light receiving unit receives infrared signals from an external device. The case has a first opening and a second opening. The case houses the optical sensor with the lens exposed to the lighting space side through the first opening, and houses the light receiving unit facing the second opening. The light-blocking wall is provided to separate the optical sensor and the light receiving unit, and prevents light entering the case through the first opening from entering the light receiving unit. The case further has a wall portion projecting from the opening edge of the first opening toward the lighting space side. In a plan view from the direction in which the second aperture and the light-receiving portion face each other, the aperture diameter of the second aperture is smaller than the outer shape of the light-receiving portion. [Effects of the Invention]

[0009] According to one aspect of the present disclosure, a lighting device makes it possible to reduce malfunctions in the light receiving unit caused by infrared rays contained in the light from the light source. [Brief explanation of the drawing]

[0010] [Figure 1] Figure 1 is a perspective view of a lighting device according to an embodiment. [Figure 2] Figure 2 is an exploded perspective view of the same lighting device. [Figure 3] Figure 3 is a front view of the main components of the lighting device shown above. [Figure 4] Figure 4 is an exploded perspective view of the sensor unit of the lighting device shown above, viewed from below. [Figure 5] Figure 5 is an exploded perspective view of the same sensor unit as shown above, viewed from above. [Figure 6] Figure 6 is a cross-sectional view of the main part of the lighting device shown above. [Figure 7] Figure 7 is a cross-sectional view of the main part of the lighting device according to a modified example 1 of the embodiment. [Modes for carrying out the invention]

[0011] (Embodiment) The lighting device according to the embodiment will be described below with reference to the drawings. The figures described in the embodiments below are schematic diagrams, and the ratios of the size and thickness of each component do not necessarily reflect the actual dimensional ratios. Furthermore, the configuration described in the embodiments below is merely one example of this disclosure. This disclosure is not limited to the embodiments below, and various modifications are possible depending on the design, etc., as long as the effects of this disclosure can be achieved.

[0012] (1) Overview First, an overview of the lighting device A1 according to this embodiment will be described with reference to Figures 1 to 5.

[0013] As shown in Figures 1 and 2, the lighting device A1 according to this embodiment comprises a light source unit B1, a sensor unit C1, and a device body 5. In the lighting device A1 according to this embodiment, the light source unit B1 and the sensor unit C1 are detachably attached to the device body 5, which is, for example, directly attached to the ceiling of the facility. The device body 5 may also be embedded in the ceiling of the facility. Alternatively, the device body 5 may be directly attached to or embedded in the wall of the facility.

[0014] The facility is, for example, a building with high ceilings, such as a logistics warehouse or a factory. In this embodiment, the case where the facility is a logistics warehouse will be used as an example. However, the facility is not limited to buildings with high ceilings as described above; for example, it may be a non-residential building such as an office building or a hospital, or it may be a residential building such as a detached house or an individual dwelling unit in an apartment building. In other words, the facility may be a building with low ceilings.

[0015] The lighting device A1 according to the embodiment includes a light source module 1 (light source), an optical sensor 71, a light receiving unit 72, and a case 8. The light source module 1 irradiates light onto an illumination space LS1 (see FIG. 1). The optical sensor 71 has a sensor unit 711 and a lens 712 disposed between the sensor unit 711 and the illumination space LS1. The light receiving unit 72 receives an infrared signal from a remote controller 100 (external device). The illumination space LS1 is a space illuminated by the light irradiated from the lighting device A1 and is a space located below the lighting device A1 (see FIG. 1).

[0016] The case 8 has a first opening 811 and a second opening 816 having an opening area (opening diameter) smaller than that of the first opening 811. The case 8 houses the optical sensor 71 with the lens 712 exposed to the illumination space LS1 side through the first opening 811, and houses the light receiving unit 72 in a state facing the second opening 816.

[0017] The light source module 1, the optical sensor 71, and the light receiving unit 72 are arranged in this order along the first direction D1: the light source module 1, the optical sensor 71, and the light receiving unit 72. The second opening 816 is located between two outer edges 7123, 7124 of the lens 712 in the second direction D2 in the second direction D2.

[0018] In the lighting device A1 according to the embodiment, as described above, the light source module 1, the optical sensor 71, and the light receiving unit 72 are arranged in this order along the first direction D1: the light source module 1, the optical sensor 71, and the light receiving unit 72. Also, the second opening 816 is located between two outer edges 7123, 7124 of the lens 712 in the second direction D2 in the second direction D2. For this reason, it is difficult for the light from the light source module 1 to enter the case 8 through the second opening 816, and as a result, it is possible to reduce the malfunction of the light receiving unit 72 caused by infrared rays contained in the light from the light source module 1.

[0019] (2) Details Next, the details of the lighting device A1 according to the embodiment will be described with reference to Figures 1 to 6. In the following description, unless otherwise specified, the longitudinal direction of the lighting device A1 will be defined as the first direction D1, the short direction (width direction) of the lighting device A1 as the second direction D2, and the height direction of the lighting device A1 as the third direction D3, as shown in Figures 1 to 6. However, these directions are not intended to limit the direction in which the lighting device A1, light source unit B1, and sensor unit C1 are used. Also, the arrows indicating "D1," "D2," and "D3" in the drawings are for illustrative purposes only and do not represent any actual objects. Furthermore, in the following description, the first direction D1 may also be referred to as the "front-back direction," the second direction D2 as the "left-right direction," and the third direction D3 as the "up-down direction."

[0020] As shown in Figures 1 and 2, the lighting device A1 according to this embodiment comprises a light source unit B1, a sensor unit C1, and a device body 5.

[0021] (2.1) Main body of the device As shown in Figure 2, the main body of the device 5 comprises a housing section 51, a pair of reflectors 52, and a pair of end plates 53. The housing section 51 is open on one side (the bottom surface in Figure 2) and is a long rectangular box in the first direction D1. The pair of reflectors 52 protrude diagonally upward from the open edges on both sides of the housing section 51 in the short direction (left-right direction). The pair of end plates 53 are provided at both ends of the housing section 51 and the pair of reflectors 52 in the longitudinal direction (front-back direction).

[0022] The main body of the device 5 is attached to the ceiling by inserting suspension bolts through at least two of the multiple mounting holes 54 provided on the bottom surface of the housing 51, and tightening nuts onto these suspension bolts. In addition, a power wire is inserted through one of the multiple power supply holes 55 provided on the bottom surface of the housing 51 of the main body of the device 5. The power wire inserted through the power supply hole 55 is electrically connected to a terminal block 56 attached to the inner bottom surface of the housing 51. Three wires 57 are drawn out from the terminal block 56, and a single male power connector 58 is connected to the end of each of these three wires 57.

[0023] (2.2) Light source unit As shown in Figure 2, the light source unit B1 comprises a light source module 1, a power supply unit 2, a mounting plate 3, and a first cover 4.

[0024] (2.2.1) Light source module The light source module 1 comprises a plurality of light-emitting elements 11 and a substrate 12. Each of the plurality of light-emitting elements 11 is, for example, a packaged white LED (Light Emitting Diode). Note that the light-emitting elements 11 are not limited to LEDs, but may also be, for example, organic electroluminescent elements or semiconductor laser elements.

[0025] The substrate 12 is formed in a long rectangular shape along the first direction D1. Multiple light-emitting elements 11 are mounted in a single row at equal intervals along the longitudinal direction (front-to-back direction) of the substrate 12, in the center of the short side (left-to-right direction) on the surface of the substrate 12 (bottom surface in Figure 2) (see Figure 2). The multiple light-emitting elements 11 are electrically connected in series or parallel by printed wiring formed on the surface of the substrate 12. Note that the substrate 12 may be composed of multiple substrates connected in the longitudinal direction (front-to-back direction).

[0026] In this embodiment, the light source is comprised of the light source module 1. That is, the light source module 1 irradiates light into the illumination space LS1.

[0027] (2.2.2) Mounting plate The mounting plate 3 is formed from a metal plate in a long, rectangular shape in the first direction D1. The mounting plate 3 has a bottom plate 31 and a pair of side plates 32. The bottom plate 31 is a long rectangle in the first direction D1. The pair of side plates 32 rise upward from both ends of the bottom plate 31 in the shorter direction (left and right direction).

[0028] The mounting plate 3 has a plurality of claws 311 and a pair of through holes 312. The plurality of claws 311 are cut out from the base plate 31 and are arranged in two rows at equal intervals along the longitudinal direction (front-to-back direction) of the base plate 31. The pair of through holes 312 are provided on both the left and right sides of one end (front end) in the longitudinal direction of the base plate 31.

[0029] The light source module 1 described above is attached to the surface of the base plate 31 (the lower surface in Figure 2) by a plurality of claws 311. The width of the base plate 31 in the short direction (left-right direction) is greater than the width of the substrate 12 in the short direction (left-right direction) (see Figure 2). Also, the length of the base plate 31 in the long direction (front-back direction) is longer than the length of the substrate 12 in the long direction (front-back direction).

[0030] (2.2.3) Cover 1 The first cover 4 is formed in a semi-cylindrical shape from a translucent synthetic resin, such as acrylic resin or polycarbonate resin. Specifically, the first cover 4 has a convex lens-shaped main portion 41 such that the amount of downward projection increases from both ends towards the center in the short direction (left-right direction). The first cover 4 also has a pair of protruding walls 42 at both ends of the main portion 41 in the short direction, projecting upward along the longitudinal direction (front-back direction) of the main portion 41.

[0031] The first cover 4 houses the mounting plate 3 between a pair of protruding walls 42, and is attached to the mounting plate 3 by hooking the hooks formed on the tips (upper ends) of the pair of protruding walls 42 onto the tips (upper ends) of the pair of side plates 32 of the mounting plate 3.

[0032] In this embodiment, the cover is composed of a first cover 4. That is, the first cover 4 is a translucent cover placed between the light source module 1 and the lighting space LS1.

[0033] (2.2.4) Power supply As shown in Figure 2, the power supply unit 2 includes a lighting circuit 21 and a power supply case 22 that houses the lighting circuit 21. The lighting circuit 21 is composed of a printed circuit board 23 with various electronic components, including an integrated circuit, and a female power connector 24 mounted on it. The power connector 58 on the device body 5 side is electrically and mechanically connected to the power connector 24.

[0034] The power supply case 22 is formed from a metal plate into a rectangular box shape with one side (the bottom side in Figure 2) open. The power supply case 22 houses the lighting circuit 21 and is fixed to the mounting plate 3 with its opening facing the back surface of the bottom plate 31 (the top side in Figure 2). When the power supply case 22 is fixed to the mounting plate 3, it is electrically connected to the mounting plate 3. Furthermore, the mounting plate 3 is electrically connected to the device body 5 when the light source unit B1 is attached to the device body 5. In other words, the power supply case 22 of the power supply unit 2 is electrically connected to the device body 5 through the mounting plate 3.

[0035] Power supply unit 2 supplies illuminating power to the light source module 1 according to the detection result of the optical sensor 71, when the optical sensor 71, described later, is enabled by the remote control signal received by the remote control receiver 72, described later. More specifically, power supply unit 2 supplies illuminating power to the light source module 1 when the optical sensor 71 detects a person present in the illuminated space LS1. Power supply unit 2 also stops supplying illuminating power to the light source module 1 when the operation hold time, described later, has elapsed since the optical sensor 71 stopped detecting the person. In other words, power supply unit 2 is a power source that supplies illuminating power to the light-emitting element 11 of the light source module 1 according to the detection result of the optical sensor 71.

[0036] (2.3) Sensor Unit As shown in Figures 3 to 5, the sensor unit C1 comprises a second cover 6, a sensor module 7, a case 8, a base 9, a support frame 10, and a plurality (three in the illustrated example) protective members 13.

[0037] (2.3.1) Cover 2 As shown in Figures 3 to 5, the second cover 6 has a main portion 61, an end portion 62, and a protruding piece 63. The second cover 6 is made of a synthetic resin that does not transmit light.

[0038] The main portion 61 has the same curved shape as the main portion 41 of the first cover 4 described above. The length of the main portion 61 in the first direction D1 (front-rear direction) is shorter than the length of the main portion 41 in the first direction D1. The end portion 62 closes one end (front end) of the main portion 61. The protruding piece 63 protrudes rearward from the periphery of the other end (rear end) of the main portion 61.

[0039] The second cover 6 further has a pair of ribs 64. The pair of ribs 64 are provided near both ends of the protruding piece 63 at the other end of the main portion 61. Each of the pair of ribs 64 protrudes parallel to the protruding piece 63.

[0040] The second cover 6 further comprises a pair of protruding walls 65. Each of the pair of protruding walls 65 is integrally formed with the main portion 61 on the back surface of the main portion 61 (the upper surface in Figure 5) and protrudes upward from the back surface of the main portion 61. Each of the pair of protruding walls 65 has a through hole 651. Each through hole 651 is an elongated hole along the first direction D1 (front-to-back direction) and penetrates the protruding wall 65 in its thickness direction.

[0041] The second cover 6 is attached to the mounting plate 3 by inserting stepped screws, which are inserted through holes 651 provided in each of the pair of protruding walls 65 and through holes provided in each of the pair of side plates 32 of the mounting plate 3, into screw holes 931 provided in each of the pair of protrusions 93 of the base 9, which will be described later. When the first cover 4 and the second cover 6 are attached to the mounting plate 3, the protruding piece 63 and the pair of ribs 64 of the second cover 6 are inserted into the end of the first cover 4 on the side of the second cover 6. As a result, the main part 41 of the first cover 4 and the main part 61 of the second cover 6 become flush.

[0042] (2.3.2) Sensor Module As shown in Figures 4 and 5, the sensor module 7 includes an optical sensor 71, a remote control light receiving unit 72, a circuit board 73, and a connector 74.

[0043] The optical sensor 71 is, for example, a pyroelectric infrared sensor. That is, the optical sensor 71 is a human presence sensor that detects a person present in the illuminated space LS1 (see Figure 1) by detecting infrared radiation emitted from the human body with a pyroelectric element. When the optical sensor 71 detects the presence of a person, it outputs a human body detection signal. As shown in Figure 6, the optical sensor 71 has a sensor unit 711, a lens 712, and a holding unit 713.

[0044] The sensor unit 711 includes the pyroelectric element described above. That is, the sensor unit 711 detects a person present in the illuminated space LS1 by detecting infrared radiation emitted from the human body. The sensor unit 711 is mounted on the surface of the substrate 73 (the lower surface in Figure 4) via a plurality of lead terminals 7111.

[0045] As shown in Figure 6, the lens 712 is located in front of (below) the sensor unit 711. The lens 712 is a focusing lens for concentrating infrared light incident from the outside (on the illumination space LS1 side) onto the sensor unit 711. More specifically, the lens 712 is a so-called small multi-lens with a dome shape that protrudes toward the illumination space LS1 side (downward side in Figure 1) in the third direction D3 (up and down direction). That is, the optical sensor 71 has a sensor unit 711 and a lens 712 positioned between the sensor unit 711 and the illumination space LS1. Multiple convex portions are formed on the back surface of the lens 712 (upper surface in Figure 6), which are convex upwards.

[0046] As shown in Figure 6, the lens 712 includes a first portion 7121 and a second portion 7122. The first portion 7121 is the part of the lens 712 located on the side of the illumination space LS1 (lower side in Figure 6) than the first end face 814 on the illumination space LS1 side of the wall portion 812 of the case 8, which will be described later. The second portion 7122 is the part of the lens 712 located on the opposite side of the illumination space LS1 (upper side in Figure 6) from the first end face 814 of the wall portion 812. In other words, in the illumination device A1, only the first portion 7121 of the lens 712 is exposed from the wall portion 812 of the case 8.

[0047] The holding portion 713 includes a first holding body 714 and a second holding body 715. The first holding body 714 is formed in a cylindrical shape with both ends open in the third direction D3 (vertical direction), and the sensor portion 711 described above is housed inside it. The second holding body 715 is formed in an annular shape with both ends open in the third direction D3, and is integrally formed with the lens 712 at one end of the lens 712 (the upper end in Figure 6). Then, with the sensor portion 711 housed inside the first holding body 714, the second holding body 715 is assembled to the first holding body 714, thereby integrating the sensor portion 711 and the lens 712 via the first holding body 714 and the second holding body 715.

[0048] Furthermore, the second retainer 715 has a projection 716, as shown in Figure 6. The projection 716 protrudes in a direction perpendicular to the third direction D3 (a direction parallel to the plane including the first direction D1 and the second direction D2). The projection 716 is formed over substantially the entire circumference of the second retainer 715. In the third direction D3, the projection 716 faces the second end face 815 (described later) of the wall portion 812. Note that the projection 716 does not necessarily have to be formed over the entire circumference of the second retainer 715; for example, it may be formed on a part of the circumferential direction of the second retainer 715.

[0049] The remote control receiver 72 is an infrared remote control receiver module that houses a photodiode, amplifier, filter, etc., in a single package. As shown in Figure 6, the remote control receiver 72 includes a module body 721 and a lens 722. The module body 721 houses the aforementioned photodiode, amplifier, filter, etc. The lens 722 is positioned between the module body 721 and the illumination space LS1 in the third direction D3 (vertical direction).

[0050] The remote control receiver 72 receives a remote control signal (hereinafter abbreviated as "remote control signal") using infrared light as the communication medium. The remote control signal is transmitted from the remote controller 100 (hereinafter abbreviated as "remote control 100"). The remote control signal includes setting information for setting the operation of the optical sensor 71. The setting information includes, for example, the operation hold time of the optical sensor 71, whether the optical sensor 71 is enabled or disabled, and information regarding dimming of the light source module 1. The operation hold time is the time from when the optical sensor 71 stops detecting the presence of a person until it continues to output a human body detection signal. The remote control signal also includes switching information for switching between turning on, turning off, and dimming the light source module 1. In this embodiment, the above-described remote control signal constitutes an infrared signal.

[0051] The remote control receiver 72 is mounted on the surface of the circuit board 73 (the bottom surface in Figure 6). That is, the optical sensor 71 and the remote control receiver 72 are mounted on the same surface of the circuit board 73 (the bottom surface in Figure 6). Furthermore, the optical sensor 71 and the remote control receiver 72 are arranged in the first direction D1 (front-to-back direction) on the same surface of the circuit board 73, with the remote control receiver 72 on the front side and the optical sensor 71 on the rear side. In this embodiment, the remote control receiver 72 constitutes the receiver, and the remote control 100 constitutes the external device. That is, the remote control receiver 72 receives remote control signals (infrared signals) from the remote control 100 (external device).

[0052] A connector 74 is mounted on the back surface of the circuit board 73 (the top surface in Figure 6). That is, the connector 74 is mounted on a different side of the circuit board 73 from the optical sensor 71 and the remote control receiver 72 (the top surface in Figure 6). As shown in Figure 6, a cable 741 containing multiple wires is connected to the connector 74. The multiple wires include a power supply wire for supplying power to the optical sensor 71 and an output wire for outputting a human body detection signal from the optical sensor 71.

[0053] Furthermore, a signal processing circuit is mounted on the surface of the substrate 73 (the bottom surface in Figure 6). The signal processing circuit processes the output of the optical sensor 71 and outputs a human body detection signal. The signal processing circuit continues to output the human body detection signal from the time the optical sensor 71 stops detecting the presence of a person until the aforementioned operation hold time has elapsed. Also, if the optical sensor 71 does not detect the presence of a person before the operation hold time has elapsed, the signal processing circuit stops outputting the human body detection signal, and if the optical sensor 71 detects the presence of a person again before the operation hold time has elapsed, it continues outputting the human body detection signal.

[0054] (2.3.3) Case Case 8 is a rectangular box-shaped synthetic resin molded body with one side (the top surface in Figure 5) open. Case 8 is configured to house and hold the sensor module 7 described above inside. A stepped portion 80 (see Figure 4) is formed around the entire circumference of the outer surface of Case 8. In addition, a first opening 811 and a second opening 816 are provided in the bottom wall 81 of Case 8. That is, Case 8 has a first opening 811 and a second opening 816. Case 8 also has a bottom wall 81 provided with the first opening 811 and the second opening 816.

[0055] The first opening 811 is an opening for exposing the lens 712 of the optical sensor 71 to the illumination space LS1 side. The second opening 816 is an opening for passing remote control signals from the remote control 100. The diameter of the first opening 811 is larger than the diameter of the second opening 816 (see Figure 3). In other words, the area of ​​the second opening 816 is smaller than the area of ​​the first opening 811. As shown in Figure 3, the first opening 811 and the second opening 816 are arranged in the first direction D1 (front-to-back direction) from the light source module 1 side of the light source unit B1, in the order of first opening 811, second opening 816. That is, in the illumination device A1, the light source module 1, optical sensor 71, and remote control receiver 72 are arranged along the first direction D1 in the order of light source module 1, optical sensor 71, and remote control receiver 72.

[0056] In the lighting device A1, as shown in Figure 6, the case 8 houses the optical sensor 71 with the lens 712 exposed to the lighting space LS1 side through the first opening 811. Also, as shown in Figure 6, the case 8 houses the remote control light receiving unit 72 facing the second opening 816.

[0057] However, if the second opening 816 remains open, insects and other creatures may enter the case 8 through the second opening 816. Therefore, in the lighting device A1, as shown in Figure 6, an insect-proof seal 14 is attached to the back surface (top surface in Figure 6) 820 side of the bottom wall 81 to seal the second opening 816. The insect-proof seal 14 is a film made of a material that can transmit at least infrared rays, such as a PET (Polyethylene Terephthalate) film.

[0058] Furthermore, as shown in Figure 6, a wall portion 812 projecting in the third direction D3 is integrally formed on the opening edge of the first opening 811. That is, the case 8 has a wall portion 812 on at least a part of the opening edge of the first opening 811. In this embodiment, the wall portion 812 is formed in a cylindrical shape around the entire circumference of the opening edge of the first opening 811 when viewed from the third direction D3. Also, in this embodiment, the wall portion 812 is a protruding wall portion that projects both downwards, which is on the side of the lighting space LS1, and upwards, which is on the opposite side of the lighting space LS1, in the third direction D3.

[0059] The wall portion 812 has an inner circumferential surface 813, a first end surface 814, and a second end surface 815. The inner circumferential surface 813 is the inner circumferential surface of the wall portion 812 and, when the optical sensor 71 is housed in the case 8, faces the second holder 715 of the first direction D1 holding portion 713, as shown in Figure 6. The first end surface 814 is the end surface on the illumination space LS1 side (lower side in Figure 6) of the two end surfaces of the wall portion 812 in the third direction D3. The second end surface 815 is the end surface on the opposite side from the illumination space LS1 side (upper side in Figure 6) of the two end surfaces of the wall portion 812 in the third direction D3.

[0060] Of the side walls of case 8 from the stepped portion 80 to the bottom wall 81, each of the pair of side walls 82 facing each other in the shorter direction (left-right direction) is formed in a semi-cylindrical shape that is convex inward. In addition, four hook portions 83 are provided on both the left and right sides near the opening end of case 8. Each of the four hook portions 83 is rectangular in shape when viewed from a third direction D3. Case 8 is attached to the base 9 by inserting the four hook portions 83 into the gaps between the main portion 91 and the four protruding pieces 92, and is attached to the mounting plate 3 via the base 9.

[0061] Here, case 8 further has a light-blocking wall (partition wall) 84. In lighting device A1, the light-blocking wall 84 is integrated with case 8. The light-blocking wall 84 divides the internal space of case 8 into two spaces (first space S1 and second space S2) in the first direction D1 (front-to-back direction). The first space S1 is a space for housing the sensor module 7. The second space S2 is a space for housing the remote control light receiver 72. The first space S1 is larger than the second space S2. The light-blocking wall 84 protrudes upward (away from the bottom wall 81) from the back surface 820 of the bottom wall 81. In other words, the light-blocking wall 84 protrudes away from the bottom wall 81 (upward in Figure 6) on the surface (back surface 820) of the bottom wall 81 opposite to the lighting space LS1 side. In lighting device A1, by providing a light-blocking wall 84 between the first space S1 and the second space S2, even when light from the light source module 1 enters the case 8 through the first opening 811, the incidence of light from the first space S1 to the second space S2 can be suppressed. As a result, malfunctions of the remote control receiver 72 caused by infrared rays contained in the light from the light source module 1 can be reduced. Furthermore, for example, even if an infrared signal (remote control signal) from a remote control corresponding to another lighting device enters the case 8 through the first opening 811, the light-blocking wall 84 can suppress its incidence to the remote control receiver 72. As a result, malfunctions of the remote control receiver 72 caused by infrared signals from a remote control corresponding to another lighting device can be reduced.

[0062] Furthermore, in the lighting device A1, as shown in Figure 6, the distance L1 from the end 723 of the remote control light receiver 72 to the back surface 820 of the bottom wall 81 is shorter than the distance L2 from the end 841 of the light suppression wall 84 to the back surface 820 of the bottom wall 81. In other words, the distance L1 from the end 723 of the remote control light receiver 72 on the bottom wall 81 side to the surface (back surface 820) of the bottom wall 81 is shorter than the distance L2 from the end 841 of the light suppression wall 84 on the opposite side of the bottom wall 81 to the surface (back surface 820) of the bottom wall 81. Therefore, compared to the case where the distance L1 is greater than or equal to the distance L2, it is possible to further reduce malfunctions of the remote control light receiver 72 caused by infrared rays contained in the light that enters the case 8 through the first opening 811.

[0063] (2.3.4) Pedestal As shown in Figures 4 and 5, the base 9 is integrally formed as a synthetic resin molded body, comprising a rectangular plate-shaped main part 91 and a pair of rectangular tubular protrusions 93 projecting upward from both the left and right sides of the main part 91. Each of the pair of protrusions 93 has a screw hole 931 that penetrates in the second direction D2 (left-right direction). In addition, L-shaped protrusions 92 project downward from the four corners of one surface of the main part 91 (the lower surface in Figure 4).

[0064] The base 9 is attached to the mounting plate 3 by inserting a pair of projections 93 through a pair of through holes 312 (see Figure 2) provided in the bottom plate 31 of the mounting plate 3, and then inserting stepped screws, which are inserted through holes provided in a pair of side plates 32 of the mounting plate 3, into a pair of screw holes 931.

[0065] (2.3.5) Support frame The support frame 10 is formed from a synthetic resin material into a rectangular frame shape with dimensions that fit inside the case 8. The support frame 10 is then fitted inside the case 8 so as to face the substrate 73 of the sensor module 7 held in the case 8. In other words, the support frame 10 is configured to support the substrate 73 of the sensor module 7 within the case 8 (see Figure 6).

[0066] (2.3.6) Protective components As shown in Figures 4 and 5, the protective member 13 includes a first protective member 131 and a pair of second protective members 132. The first protective member 131 is formed in the shape of a long rod along the second direction D2 (left-right direction) and is positioned in front of the base 9. The pair of second protective members 132 are formed in the shape of a long rod along the first direction D1 (front-back direction) and are positioned on both the left and right sides of the support frame 10. The first protective member 131 and the pair of second protective members 132 prevent foreign matter (e.g., dust, dirt, moisture, insects, etc.) from entering the sensor module 7 side (bottom of Figure 4) from the mounting plate 3 side (upper side of Figure 4) when the sensor unit C1 is mounted on the mounting plate 3.

[0067] (3) Main parts of the lighting device Next, the main components of the lighting device A1 will be described with reference to Figures 3 and 6.

[0068] In lighting device A1, as shown in Figure 3, the light source unit B1 and the sensor unit C1 are arranged in the first direction D1 (front-to-back direction). More specifically, in lighting device A1, the light source module 1, the optical sensor 71, and the remote control receiver 72 are arranged in the first direction D1 in the order of light source module 1, optical sensor 71, and remote control receiver 72. In addition, in lighting device A1, the second opening 816 of case 8 is located in the second direction D2 (up-down direction in Figure 3) within the range W1 between the two outer edges 7123 and 7124 of the lens 712 of the optical sensor 71 in the second direction D2. That is, the second opening 816 is not visible from the light source module 1 side because the lens 712 is present between it and the light source module 1. As a result, light from the light source module 1 is blocked by the lens 712 and is less likely to enter case 8 through the second opening 816. Therefore, according to the lighting device A1, it is possible to reduce malfunctions of the remote control receiver 72 caused by infrared rays contained in the light from the light source module 1.

[0069] Furthermore, in lighting device A1, as shown in Figure 6, the opening edge 817 on the side opposite to the remote control light receiver 72 in the second opening 816 provided in the case 8 is located on the lighting space LS1 side (lower side in Figure 6) than the surface 411 on the side opposite to the light source module 1 in the main part 41 of the first cover 4. Therefore, it is difficult for light from the light source module 1 to enter the case 8 through the second opening 816. Consequently, lighting device A1 makes it possible to reduce malfunctions of the remote control light receiver 72 caused by infrared rays contained in the light from the light source module 1.

[0070] Furthermore, in the lighting device A1, as shown in Figure 6, a light-blocking wall 84 is provided within the case 8 between the first space S1 where the optical sensor 71 is housed and the second space S2 where the remote control light receiver 72 is housed. This light-blocking wall 84 prevents light from the light source module 1, which enters the first space S1 through the first opening 811, from entering the second space S2. In other words, the lighting device A1 further includes a light-blocking wall 84 that separates the optical sensor 71 and the remote control light receiver 72, and prevents light that enters the case 8 through the first opening 811 from entering the remote control light receiver 72. Therefore, the lighting device A1 makes it possible to prevent light from the light source module 1, which enters the case 8 through the first opening 811, from entering the remote control light receiver 72. Consequently, the lighting device A1 makes it possible to reduce malfunctions of the remote control light receiver 72 caused by infrared rays contained in the light from the light source module 1. Furthermore, with the lighting device A1, for example, infrared radiation emitted from a person present in the lighting space LS1 that enters the case 8 through the first opening 811 can also be suppressed by the light suppression wall 84. Therefore, with the lighting device A1, malfunctions of the remote control light receiver 72 caused by infrared radiation entering the case 8 through the first opening 811 can also be reduced.

[0071] (4) Effects In the lighting device A1 according to this embodiment, the light source module 1, the optical sensor 71, and the remote control light receiver 72 are arranged in the order of light source module 1, optical sensor 71, and remote control light receiver 72 along the first direction D1. Furthermore, in the lighting device A1 according to this embodiment, the second aperture 816 is located in the second direction D2 between the two outer edges 7123 and 7124 of the lens 712 in the second direction D2. As a result, it is difficult for light from the light source module 1 to enter the second space S2 of the case 8 through the second aperture 816. This makes it possible to reduce malfunctions of the remote control light receiver 72 caused by infrared rays contained in the light from the light source module 1.

[0072] Furthermore, in the lighting device A1 according to this embodiment, the opening edge 817 of the second opening 816 opposite to the remote control light receiving unit 72 is located on the lighting space LS1 side of the surface 411 of the first cover 4 opposite to the light source module 1 side. As a result, it is difficult for light from the light source module 1 to enter the second space S2 of the case 8 through the second opening 816. This makes it possible to reduce malfunctions of the remote control light receiving unit 72 caused by infrared rays contained in the light from the light source module 1.

[0073] Furthermore, in the lighting device A1 according to this embodiment, a light-blocking wall 84 is provided to separate the optical sensor 71 and the light-receiving unit 72. Therefore, even when light from the light source module 1 enters the case 8 through the first opening 811, it is less likely to enter the light-receiving unit 72. This makes it possible to reduce malfunctions of the remote control light-receiving unit 72 caused by infrared rays contained in the light that enters the case 8 through the first opening 811.

[0074] Furthermore, in the lighting device A1 according to this embodiment, the distance L1 from the end 723 on the bottom wall 81 side of the remote control light receiving unit 72 to the back surface 820 of the bottom wall 81 is shorter than the distance L2 from the end 841 on the opposite side of the light suppression wall 84 to the back surface 820 of the bottom wall 81. Therefore, compared to the case where the distance L1 is greater than or equal to the distance L2, it is possible to further reduce malfunctions of the remote control light receiving unit 72 caused by infrared rays contained in the light incident into the case 8 through the first opening 811.

[0075] Furthermore, in the lighting device A1 according to this embodiment, the light-blocking wall 84 is integrated with the case 8. This eliminates the need to install the light-blocking wall, compared to the case where the light-blocking wall is separate from the case.

[0076] Furthermore, in the lighting device A1 according to this embodiment, the sensor unit 711 detects people present in the lighting space LS1. This makes it possible to light up the light source module 1 depending on whether or not there are people present.

[0077] (5) Variant The embodiments described above are merely one of many embodiments of this disclosure. The embodiments described above can be modified in various ways depending on the design, etc., as long as the objectives of this disclosure are achieved. The following lists some modifications of the embodiments described above. The modifications described below can be combined and applied as appropriate.

[0078] (5.1) Variation 1 In the above-described embodiment, as shown in Figures 5 and 6, a plate-shaped light-blocking wall 84 is provided between the first space S1 in which the optical sensor 71 is housed and the second space S2 in which the remote control light-receiving unit 72 is housed. However, as shown in Figure 7, the light-blocking wall 84A may be cylindrical, surrounding the remote control light-receiving unit 72. That is, the light-blocking wall 84A is cylindrical, surrounding the remote control light-receiving unit 72 (light-receiving unit). The light-blocking wall 84A only needs to surround the remote control light-receiving unit 72, and may be cylindrical or rectangular, for example. By making the light-blocking wall 84A cylindrical, it becomes possible to more effectively block the light from the light source module 1 that enters the case 8 through the first opening 811 compared to the light-blocking wall 84 described above.

[0079] (5.2) Other variations In the embodiment described above, the optical sensor 71 is a motion sensor, but the optical sensor 71 is not limited to a motion sensor; for example, it may be an image sensor. In this case, the lighting device A1, for example, turns on the light source module 1 when it detects a person with the image sensor, and turns off the light source module 1 after a certain period of time has elapsed since the image sensor stopped detecting a person.

[0080] In the above-described embodiment, the lighting device A1 is a long lighting fixture in the first direction D1 (front-to-back direction). However, the lighting device A1 is not limited to the above-described lighting fixture, but may be, for example, a ceiling light. In other words, the lighting device A1 is not limited to the lighting fixture described in the above-described embodiment.

[0081] In the embodiment described above, the wall portion 812 is formed around the entire circumference of the opening edge of the first opening 811, but the wall portion 812 may be formed on only a part of the opening edge of the first opening 811. That is, the wall portion 812 only needs to be formed on at least a part of the opening edge of the first opening 811.

[0082] In the above-described embodiment, the wall portion 812 protrudes both downwards, which is on the side of the lighting space LS1, and upwards, which is on the opposite side of the lighting space LS1, in the third direction D3. In contrast, the wall portion 812 may, for example, protrude only downwards, which is on the side of the lighting space LS1, or protrude only upwards, which is on the opposite side of the lighting space LS1, in the third direction D3. In short, the wall portion 812 only needs to protrude on at least one of the sides of the lighting space LS1 and the side opposite to the lighting space LS1, in the third direction D3.

[0083] In the above-described embodiment, the lighting device A1 comprises a light source unit B1, a sensor unit C1, and a device body 5. However, the device body 5 does not necessarily have to be included in the lighting device A1. That is, the lighting device A1 may consist only of the light source unit B1 and the sensor unit C1.

[0084] In the above-described embodiment, the first opening 811 and the second opening 816 are circular in shape, but each of the first opening 811 and the second opening 816 may be rectangular or elliptical, for example. In other words, any shape is acceptable as long as the opening area of ​​the second opening 816 is smaller than the opening area of ​​the first opening 811.

[0085] (Appearance) This specification discloses the following aspects:

[0086] The first embodiment of the illumination device (A1) comprises a light source (1), an optical sensor (71), a light receiving unit (72), and a case (8). The light source (1) irradiates light into the illumination space (LS1). The optical sensor (71) has a sensor unit (711) and a lens (712) positioned between the sensor unit (711) and the illumination space (LS1). The light receiving unit (72) receives infrared signals from an external device (100). The case (8) has a first opening (811) and a second opening (816) having a smaller opening area than the first opening (811). The case (8) houses the optical sensor (71) with the lens (712) exposed to the illumination space (LS1) side through the first opening (811), and houses the light receiving unit (72) facing the second opening (816). The light source (1), optical sensor (71), and light receiving unit (72) are arranged in the order of light source (1), optical sensor (71), and light receiving unit (72) along the first direction (D1). The second aperture (816) is located between the two outer edges (7123, 7124) of the lens (712) in the second direction (D2), which intersects the first direction (D1).

[0087] In this embodiment, light from the light source (1) is less likely to enter the case (8) through the second aperture (816). This makes it possible to reduce malfunctions of the light receiving unit (72) caused by infrared rays contained in the light from the light source (1).

[0088] In the second embodiment of the lighting device (A1), a light-transmitting cover (4) is further provided in the first embodiment. The cover (4) is positioned between the light source (1) and the lighting space (LS1). The opening edge (817) of the second opening (816) opposite to the light-receiving part (72) is located on the lighting space (LS1) side of the cover (4) than the surface (411) opposite to the light source (1).

[0089] In this embodiment, the opening edge (817) of the second opening (816) is located on the illumination space (LS1) side of the surface (411) of the cover (4), making it difficult for light from the light source (1) to enter the case (8) through the second opening (816). This makes it possible to reduce malfunctions of the light receiving unit (72) caused by infrared rays contained in the light from the light source (1).

[0090] The third embodiment of the lighting device (A1) comprises a light source (1), a light-transmitting cover (4), an optical sensor (71), a light-receiving unit (72), and a case (8). The light source (1) irradiates light into the lighting space (LS1). The cover (4) is positioned between the light source (1) and the lighting space (LS1). The optical sensor (71) has a sensor unit (711) and a lens (712) positioned between the sensor unit (711) and the lighting space (LS1). The light-receiving unit (72) receives infrared signals from an external device (100). The case (8) has a first opening (811) and a second opening (816). The case (8) houses the optical sensor (71) with the lens (712) exposed to the illumination space (LS1) side through the first opening (811), and also houses the light-receiving unit (72) facing the second opening (816). The opening edge (817) of the second opening (816) opposite to the light-receiving unit (72) side is located on the illumination space (LS1) side than the surface (411) of the cover (4) opposite to the light source (1) side.

[0091] In this embodiment, the opening edge (817) of the second opening (816) is located on the illumination space (LS1) side of the surface (411) of the cover (4), making it difficult for light from the light source (1) to enter the case (8) through the second opening (816). This makes it possible to reduce malfunctions of the light receiving unit (72) caused by infrared rays contained in the light from the light source (1).

[0092] The illumination device (A1) according to the fourth embodiment further comprises a light-blocking wall (84) in any one of the first to third embodiments. The light-blocking wall (84) is provided to separate the optical sensor (71) and the light-receiving unit (72) and prevents light that enters the case (8) through the first opening (811) from entering the light-receiving unit (72).

[0093] According to this embodiment, even when light from the light source (1) enters the case (8) through the first aperture (811), the light-blocking wall (84) makes it difficult for the light to enter the light-receiving section (72). This makes it possible to reduce malfunctions of the light-receiving section (72) caused by infrared rays contained in the light from the light source (1).

[0094] The fifth embodiment of the lighting device (A1) comprises a light source (1), an optical sensor (71), a light receiving unit (72), a case (8), and a light-blocking wall (84). The light source (1) irradiates light into the lighting space (LS1). The optical sensor (71) has a sensor part (711) and a lens (712) positioned between the sensor part (711) and the lighting space (LS1). The light receiving unit (72) receives infrared signals from an external device (100). The case (8) has a first opening (811) and a second opening (816). The case (8) houses the optical sensor (71) with the lens (712) exposed to the lighting space (LS1) side through the first opening (811), and houses the light receiving unit (72) facing the second opening (816). The light-blocking wall (84) is provided to separate the optical sensor (71) and the light-receiving unit (72), and prevents light that enters the case (8) through the first opening (811) from entering the light-receiving unit (72).

[0095] According to this embodiment, even when light from the light source (1) enters the case (8) through the first aperture (811), the light-blocking wall (84) makes it difficult for the light to enter the light-receiving section (72). This makes it possible to reduce malfunctions of the light-receiving section (72) caused by infrared rays contained in the light from the light source (1).

[0096] In the sixth embodiment of the lighting device (A1), in the fourth or fifth embodiment, the case (8) has a bottom wall (81) provided with a first opening (811) and a second opening (816). The light-blocking wall (84) protrudes away from the bottom wall (81) on the surface (820) of the bottom wall (81) opposite to the lighting space (LS1). The distance (L1) from the bottom wall (81) side end (723) of the light-receiving section (72) to the bottom wall (81) surface (820) is shorter than the distance (L2) from the bottom wall (841) side end (841) of the light-blocking wall (84) opposite to the bottom wall (81) surface (820).

[0097] According to this embodiment, it is possible to further reduce malfunctions of the light receiving unit (72) caused by infrared rays contained in the light from the light source (1) that enters the case (8) through the first opening (811).

[0098] In the lighting device (A1) according to the seventh embodiment, in any one of the fourth to sixth embodiments, the light suppression wall (84) is integrated with the case (8).

[0099] In this embodiment, compared to the case where the light-blocking wall is separate from the case, the work of installing the light-blocking wall is unnecessary.

[0100] In the lighting device (A1) according to the eighth embodiment, in any one of the fourth to seventh embodiments, the light suppression wall (84A) is cylindrical and surrounds the light receiving unit (72).

[0101] According to this embodiment, compared to the case where a light-blocking wall (84) is provided only between the optical sensor (71) and the light-receiving unit (72), it is possible to reduce malfunctions of the light-receiving unit (72) caused by light from the light source (1) that enters the case (8) through the first opening (811).

[0102] In the lighting device (A1) according to the ninth embodiment, in any one of the first to eighth embodiments, the sensor unit (711) detects a person present in the illuminated space (LS1).

[0103] According to this embodiment, it is possible to turn on the light source (1) depending on whether or not there is a person present.

[0104] The configurations relating to the second, fourth, and sixth to ninth aspects are not essential to the lighting device (A1) and can be omitted as appropriate. [Explanation of symbols]

[0105] 1. Light source module (light source) 4. First cover (cover) 8 cases 71 Optical Sensors 72 Remote control receiver (receiver) 81 Bottom wall 84,84A Light suppression wall 100 Remote controller (external device) 411 Surface 711 Sensor Unit 712 Lens 723 End 811 First opening 816 Second opening 817 Open edge 820 surface 841 End 7123, 7124 outer edge A1 Lighting device D1 1st direction D2 2nd direction D3 Third direction L1,L2 distance LS1 Lighting Space

Claims

1. A light source that illuminates the space, An optical sensor having a sensor unit and a lens disposed between the sensor unit and the illumination space, A light receiving unit that receives infrared signals from an external device, The device comprises a case having a first opening and a second opening having a smaller opening area than the first opening, housing the optical sensor with the lens exposed to the illumination space side through the first opening, and housing the light receiving unit facing the second opening, The light source, the optical sensor, and the light receiving unit are arranged in the order of the light source, the optical sensor, and the light receiving unit along the first direction. The second aperture is located between the two outer edges of the lens in a second direction intersecting the first direction, In a plan view from the direction in which the second opening and the light-receiving portion face each other, the diameter of the second opening is smaller than the outer shape of the light-receiving portion. Lighting device.

2. The light source and the illuminated space are further provided with a translucent cover. The edge of the second opening opposite to the light-receiving portion is located on the illumination space side of the surface of the cover opposite to the light source side. The lighting device according to claim 1.

3. A light source that illuminates the space, A translucent cover is placed between the light source and the illuminated space, An optical sensor having a sensor unit and a lens disposed between the sensor unit and the illumination space, A light receiving unit that receives infrared signals from an external device, The device comprises a case having a first opening and a second opening, housing the optical sensor with the lens exposed to the illumination space side through the first opening, and housing the light receiving unit facing the second opening, The opening edge of the second opening opposite to the light-receiving portion is located on the illumination space side of the surface of the cover opposite to the light source side. The case further has a wall portion that protrudes from the opening edge of the first opening toward the lighting space, In a plan view from the direction in which the second opening and the light-receiving portion face each other, the diameter of the second opening is smaller than the outer shape of the light-receiving portion. Lighting device.

4. The optical sensor and the light receiving unit are separated by a light-blocking wall that prevents light entering the case through the first opening from entering the light receiving unit. A lighting device according to any one of claims 1 to 3.

5. A light source that illuminates the space, An optical sensor having a sensor unit and a lens disposed between the sensor unit and the illumination space, A light receiving unit that receives infrared signals from an external device, A case having a first opening and a second opening, housing the optical sensor with the lens exposed to the illumination space side through the first opening, and housing the light receiving unit facing the second opening, The optical sensor and the light receiving unit are separated by a light-blocking wall that prevents light entering the case through the first opening from entering the light receiving unit. The case further has a wall portion that protrudes from the opening edge of the first opening toward the lighting space, In a plan view from the direction in which the second opening and the light-receiving portion face each other, the diameter of the second opening is smaller than the outer shape of the light-receiving portion. Lighting device.

6. The case has a bottom wall provided with the first opening and the second opening, The light-suppressing wall protrudes away from the bottom wall on the surface of the bottom wall opposite to the illuminated space side, The distance from the end of the light-receiving section on the bottom wall side to the surface of the bottom wall is shorter than the distance from the end of the light-suppressing wall on the opposite side to the bottom wall side to the surface of the bottom wall. The lighting device according to claim 4 or 5.

7. The light-suppressing wall is integrated with the case. A lighting device according to any one of claims 4 to 6.

8. The light-suppressing wall is cylindrical and surrounds the light-receiving part. The lighting device according to any one of claims 4 to 7.

9. The sensor unit detects a person present in the illuminated space. A lighting device according to any one of claims 1 to 8.

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