Lighting device and lighting fixture

Abstract

To provide a lighting device and a lighting fixture that can suppress noise.SOLUTION: A light source unit A1 includes: an LED module; and a support member 3 including a first surface and a second surface 30B on an opposite to the first surface and supporting the LED module on a side of the first surface. The light source unit A1 includes: a cover 5 having light transmissivity and supported to the support member 3 so as to cover the LED module; and one or more heat conductive member 7 disposed on a side of the second surface 30B of the support member 3. The heat conductive member 7 comes into contact with the support member 3 at one or more parts.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to a lighting device and a lighting fixture, and more particularly to a lighting device having a light source and a lighting fixture having the lighting device. [Background technology]

[0002] As a conventional example, a light-emitting unit (lighting device) and a lighting device (lighting equipment) described in Patent Document 1 are exemplified.

[0003] The lighting device described in Patent Document 1 (hereinafter referred to as the conventional example) is composed of a lighting fixture (fixture body) and a light-emitting unit (lighting device). The light-emitting unit has a light source unit, a power supply unit, etc. The light source unit has a mounting member, an LED board, a front cover, etc. The power supply unit has a power supply board and a power supply case that houses the power supply board. The mounting member is a long member formed by bending sheet metal to have a U-shaped cross section, and the LED board is attached to its underside. The front cover is made of a light-transmitting material such as acrylic resin, and is attached to the mounting member so as to cover the underside of the mounting member to which the LED board is attached. The power supply unit is attached to the upper side of the mounting member.

[0004] The lighting fixture includes a fixture body that is attached to a ceiling or the like and that detachably holds the light-emitting unit, and a cover member that is attached to the fixture body. The fixture body has a storage recess formed in its lower portion for storing the power supply unit. The cover member is formed in a bottomed rectangular tube shape from a material with high thermal conductivity such as metal, and is housed in the storage recess of the fixture body and thermally coupled to the fixture body. When the light-emitting unit is attached to the lighting fixture, the cover member and the power supply case of the power supply unit are in surface contact. As a result, heat generated in the power supply unit is dissipated from the power supply case to the fixture body via the cover member, thereby suppressing a rise in temperature of the power supply unit. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2015-32354 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, the light-emitting unit (illumination device) of the above-mentioned conventional example may generate abnormal noise due to the difference in thermal expansion coefficient between the metal mounting member and the synthetic resin front cover. That is, when the expansion and contraction force of the synthetic resin front cover, which has a relatively large thermal expansion coefficient, exceeds the maximum static friction force at the contact surface between the mounting member and the front cover, the distortion generated in the front cover is suddenly released. When the distortion of the front cover is suddenly released, friction noise accompanied by vibration is generated at the contact surface of the front cover with the mounting member. This phenomenon is generally known as the stick-slip phenomenon. It is considered that the higher the temperature of the two members (the mounting member and the front cover), the more likely it is that abnormal noise due to the stick-slip phenomenon will occur.

[0007] An object of the present disclosure is to provide a lighting device and a lighting fixture that can suppress abnormal noise. [Means for solving the problem]

[0008] An illumination device according to one aspect of the present disclosure includes a light source and a support member having a first surface and a second surface opposite to the first surface, the support member supporting the light source on the side of the first surface. The illumination device includes a light-transmitting cover supported by the support member so as to cover the light source, and one or more heat-conducting members disposed on the second surface side of the support member. The heat-conducting members contact the support member at one or more points.

[0009] A lighting fixture according to one aspect of the present disclosure includes the lighting device and a fixture body that detachably supports the lighting device.

[0010] A lighting fixture according to one aspect of the present disclosure includes a lighting device, a fixture body that detachably supports the lighting device, and a heat-conducting member. The lighting device includes a light source, a support member that has a first surface and a second surface opposite to the first surface and supports the light source on the side of the first surface, and a light-transmitting cover that is supported by the support member so as to cover the light source. The heat-conducting member is in contact with the support member and the fixture body at one or more points. Effect of the Invention

[0011] The lighting device and lighting fixture of the present disclosure have the advantage of being able to suppress abnormal noise. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a perspective view of a light source unit and a lighting fixture according to an embodiment of the present disclosure. [Diagram 2] FIG. 2 is an exploded perspective view of the light source unit and the lighting fixture as viewed from above. [Diagram 3] FIG. 3 is a perspective view of the light source unit and the main body of the lighting fixture as viewed from above. [Figure 4] FIG. 4 is a side view of the light source unit. [Diagram 5] 5A and 5B are vertical cross-sectional views of the above lighting device with a portion omitted. [Figure 6] FIG. 6 is a side view of the above lighting fixture with a portion thereof omitted. [Figure 7] FIG. 7 is a circuit block diagram of the light source unit of the above embodiment. [Figure 8] FIG. 8 is a side view of the temporarily hung lighting fixture of the above, with some parts omitted. [Figure 9] FIG. 9 is a partially omitted side view of the above lighting fixture showing the process of attaching the light source unit to the fixture body. [Figure 10] FIG. 10 is an exploded perspective view of the lighting fixture of the first modification. [Figure 11]FIG. 11 is a perspective view of the lighting fixture of the first modification example in a state where the fixture body is attached to a ceiling. [Figure 12] FIG. 12 is a cross-sectional view of a main part of a light source unit according to the second modification. [Figure 13] FIG. 13 is a side view of a main part of the light source unit of the third modified example. [Figure 14] FIG. 14 is a side view of the lighting fixture of the fourth modification, with some parts omitted. [Figure 15] Fig. 15A is a side view of a heat conduction member in the light source unit of Modification 5. Fig. 15B is a side view of another heat conduction member in the light source unit of Modification 5. Fig. 15C is a side view of yet another heat conduction member in the light source unit of Modification 5. Fig. 15D is a side view of yet another heat conduction member in the light source unit of Modification 5. Fig. 15E is a side view of another heat conduction member in the light source unit of Modification 5. [Figure 16] Fig. 16A is a side view of a main part of a fixture body in a lighting fixture of Modification 6. Fig. 16B is a side view of further main parts of the fixture body in a lighting fixture of Modification 6. Fig. 16C is a side view of still another main part of a fixture body in a lighting fixture of Modification 6. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, the lighting device and the lighting fixture according to the embodiment of the present disclosure will be described in detail with reference to the drawings. However, each figure described in the following embodiment is a schematic diagram, and the ratio of the size and thickness of each component does not necessarily reflect the actual dimensional ratio. Note that the configuration described in the following embodiment is merely an example of the present disclosure. The present disclosure is not limited to the following embodiment, and various modifications are possible depending on the design, etc., as long as the effects of the present disclosure can be achieved.

[0014] (1) Overview The lighting device (light source unit A1) according to the embodiment includes an LED module 1 which is a light source, and a support member 3 which has a first surface 30A and a second surface 30B opposite to the first surface 30A and supports the LED module 1 on the side of the first surface 30A (see Figs. 2 to 4). The lighting device (light source unit A1) according to the embodiment includes a light-transmitting cover 5 which is supported by the support member 3 so as to cover the LED module 1, and one or more heat conductive members 7 which are arranged on the side of the second surface 30B of the support member 3. The heat conductive members 7 contact the support member 3 at one or more points.

[0015] Thus, the lighting device (light source unit A1) according to the embodiment can suppress a rise in temperature of the support member 3 and the cover 5 by thermally conducting the heat generated by the LED module 1 while it is turned on to the thermal conductive member 7. As a result, the lighting device (light source unit A1) according to the embodiment can suppress a rise in temperature of the support member 3 and the cover 5 and suppress abnormal noise.

[0016] Moreover, the lighting fixture B1 according to the embodiment includes the lighting device (light source unit A1) according to the embodiment, and a fixture body 6 that detachably supports the lighting device (light source unit A1).

[0017] Therefore, since the lighting fixture B1 according to the embodiment includes the lighting device (light source unit A1) according to the embodiment, it is possible to suppress temperature rise in the support member 3 and the cover 5 of the lighting device (light source unit A1) and thereby suppress abnormal noise.

[0018] Furthermore, a lighting fixture B1 according to another embodiment includes a lighting device (light source unit A1), a fixture body 6 that detachably supports the lighting device (light source unit A1), and a heat-conducting member 7. The lighting device (light source unit A1) includes a light source (LED module 1), a support member 3 that has a first surface 30A and a second surface 30B opposite to the first surface 30A and supports the LED module 1 on the first surface 30A side, and a light-transmitting cover 5 supported by the support member 3 so as to cover the LED module 1. The heat-conducting member 7 contacts the support member 3 and the fixture body 6 at one or more points. In other words, the heat-conducting member 7 may be provided in the fixture body 6 instead of the lighting device (light source unit A1).

[0019] Therefore, in the lighting fixture B1 of another embodiment, the heat generated by the LED module 1 while it is turned on is conducted to the fixture body 6 through the heat conductive member 7, thereby suppressing the temperature rise of the support member 3 and the cover 5 and reducing abnormal noise.

[0020] (2) Details Hereinafter, a lighting device (light source unit A1) and a lighting fixture B1 according to an embodiment will be described in detail with reference to the drawings.

[0021] (2-1) Lighting equipment First, a lighting fixture B1 according to an embodiment (hereinafter, abbreviated as lighting fixture B1) will be described.

[0022] As shown in Figs. 1 to 3, the lighting fixture B1 includes a lighting device according to an embodiment, that is, a light source unit A1 (hereinafter, abbreviated as light source unit A1), and a fixture body 6 that supports the light source unit A1. The light source unit A1 is detachably attached to the fixture body 6 that is directly attached to the ceiling. However, the fixture body 6 may be embedded in the ceiling as described below. Alternatively, the fixture body 6 may be directly attached to a wall or embedded in the wall.

[0023] The device main body 6 includes a long box-shaped storage section 60 with an open bottom, a pair of reflecting plates 61 protruding obliquely upward from both opening edges along the longitudinal direction of the storage section 60, and a pair of end plates 62 provided on both longitudinal ends of the storage section 60 and the pair of reflecting plates 61 (see Figs. 2 and 3). The storage section 60 and the pair of reflecting plates 61 are integrally formed by punching and bending a metal plate. However, the device main body 6 may not include the pair of reflecting plates 61 and may be composed only of the storage section 60 whose both longitudinal ends are closed by the pair of end plates 62.

[0024] The fixture body 6 is installed on the ceiling S1 by inserting suspension bolts 90 into at least any two of the multiple mounting holes 63 provided on the bottom surface (top surface) of the storage section 60 and fastening nuts 91 to the suspension bolts 90 (see FIG. 2). A power cable 92 is inserted into any one of the multiple power supply holes 64 provided on the bottom surface of the storage section 60. However, when multiple lighting fixtures B1 are installed, another power supply cable for sending wiring may be inserted into another power supply hole 64. Furthermore, as described below, another power supply cable for sending wiring may be inserted into a hole formed by cutting out a knockout portion 620 (see FIG. 2) provided on the end plate 62.

[0025] A terminal block 65 is attached to the bottom surface of the housing portion 60. The terminal block 65 is electrically connected to a power line 93. A power connector 94 is provided at the tip of the power line 93.

[0026] Thus, the power cable 92 inserted into the power hole 64 of the fixture body 6 is electrically connected to the terminal block 65, and is electrically connected to the power supply unit 2 of the light source unit A1 via the terminal block 65, the power line 93 and the power connector 94.

[0027] The storage section 60 has a pair of hook holes 600 and a pair of hook portions 601 at positions near both ends in the longitudinal direction (see FIG. 2). The pair of hook holes 600 are provided in a side wall at one end in the short direction of the storage section 60. The pair of hook portions 601 are disposed at an upper portion of the other end in the short direction of the storage section 60 (see FIG. 2). However, in the device body 6, instead of providing the pair of hook holes 600 in the side wall at one end in the short direction of the storage section 60, a metal fitting having hook holes may be provided at one end in the short direction of the storage section 60.

[0028] (2-2) Light source unit 2 and 3, the light source unit A1 includes an LED module 1, a support member 3, a cover 5, and a heat conductive member 7. The light source unit A1 further includes a power supply unit 2 and a communication unit 4.

[0029] (2-2-1) LED module The LED module 1 has two substrates 11 and a number of LEDs (Light Emitting Diodes) 10 mounted on the surface (lower surface) of each substrate 11. The LEDs 10, which are light-emitting elements, are, for example, packaged white LEDs for lighting. However, the light-emitting elements are not limited to LEDs, and may be organic electroluminescence elements or semiconductor laser elements. The number of substrates 11 in the LED module 1 is not limited to two, and may be three or more, or one.

[0030] Each substrate 11 is formed in a long rectangular shape. A large number of LEDs 10 are mounted in a row at equal intervals along the longitudinal direction of each substrate 11 at the center of the short side on the surface (lower surface) of each substrate 11 (see FIG. 2). The large number of LEDs 10 are electrically connected in series or series-parallel by printed wiring formed on the surface of each substrate 11. In addition, two sets of connectors 12 are mounted on one end of the longitudinal direction on the surface of each substrate 11 (see FIG. 2). The printed wiring formed on the surface of each substrate 11 is electrically connected via the two sets of connectors 12.

[0031] (2-2-2) Support member The support member 3 is made of a metal plate and formed in a long rectangular shape (see Figs. 2 and 6). The support member 3 has a long rectangular bottom plate 30 and a pair of side plates 31 rising upward from both ends along the longitudinal direction of the bottom plate 30. The LED module 1 is attached to the first surface 30A (lower surface) of the bottom plate 30 by a plurality of claws 301 cut and raised from the bottom plate 30 (see Fig. 6). The width of the short side of the bottom plate 30 is larger than the width of the board 11 in the short side (see Fig. 2). However, the LED module 1 may be attached to the bottom plate 30 by sliding the board 11 along the longitudinal direction of the bottom plate 30 to hook it on the plurality of claws 301, and then restricting the movement of the board 11 with a retaining piece provided on the bottom plate 30. Alternatively, a mounting method of hooking a protrusion other than the claws 301 onto the end of the board 11, or a mounting method of bonding the board 11 to the bottom plate 30 with an adhesive may be adopted.

[0032] The bottom plate 30 has protrusions 34 at both ends in the short side direction (see FIG. 6). Each protrusion 34 is U-shaped when viewed in the long side direction of the bottom plate 30, and protrudes downward from the first surface 30A of the bottom plate 30. The pair of side plates 31 protrude upward from the outer ends of the protrusions 34.

[0033] The support member 3 is provided with a pair of hook fittings 37 protruding from one end in the short side direction to the outside of the support member 3 near both ends in the longitudinal direction (see Figs. 2 and 3). Furthermore, the support member 3 is provided with a pair of hook springs 38 at the other end in the short side direction near both ends in the longitudinal direction (see Fig. 3). The pair of hook fittings 37 and the pair of hook springs 38 serve to hold the light source unit A1 in the fixture body 6 as described below.

[0034] (2-2-3) Power supply unit The power supply unit 2 includes a power supply device 20 and a power supply case 21 that houses the power supply device 20 (see FIG. 5A).

[0035] The power supply device 20 has a printed circuit board 22 in which wiring conductors are printed on a rectangular insulating substrate, and a plurality of circuit components (not shown) mounted on both the front and back sides of the printed circuit board 22. In other words, the power supply device 20 is composed of a printed circuit.

[0036] 7 shows a circuit configuration of the power supply device 20. The power supply device 20 includes a power conversion circuit 200, a constant current circuit 201, a control circuit 202, and the like.

[0037] The power conversion circuit 200 includes, for example, a rectifier circuit such as a diode bridge, a boost chopper circuit (power factor correction circuit), etc. The power conversion circuit 200 converts AC power supplied from an external power source P1 through a power connector 23 into DC power. The external power source P1 is, for example, a commercial power system, and supplies an AC voltage and AC current with an effective value of 100V or 200V. However, the power conversion circuit 200 may include a switching power supply circuit having a power factor correction function, such as a step-down chopper circuit, a step-up / step-down chopper circuit, or a flyback converter, instead of the step-up chopper circuit.

[0038] The constant current circuit 201 has, for example, a step-down chopper circuit (buck converter). The constant current circuit 201 steps down the DC voltage output from the power conversion circuit 200 and applies it to the LED module 1, and adjusts the DC current flowing through the LED module 1. However, the constant current circuit 201 may include various chopper circuits, series regulators, etc., instead of the step-down chopper circuit.

[0039] The control circuit 202 has, for example, a microcontroller. The control circuit 202 controls the power conversion circuit 200 so as to maintain the output voltage of the power conversion circuit 200 at a constant DC voltage. Furthermore, the control circuit 202 controls the step-down chopper circuit of the constant current circuit 201 so as to make the DC current supplied from the constant current circuit 201 to the LED module 1 coincide with a target value. Note that the control circuit 202 changes the target value of the DC current supplied to the LED module 1 in response to a control signal received from the communication unit 4, as described later.

[0040] Here, the power connector 23 is mounted on one end in the longitudinal direction of the printed circuit board 22 (see FIG. 5A). Note that the power connector 23 in the embodiment is a connector to which the power connector 94 is removably connected, but a terminal block to which the conductor of an electric wire is electrically connected may be used instead of the power connector 23. Alternatively, instead of the power connector 23, an output wire may be drawn from the power supply device 20 and soldered to the conductor of the power line 93. Note that the configuration of the power connector 23 includes configurations other than those described above. However, FIG. 5A omits illustration of circuit components mounted on the front surface (lower surface) and back surface (upper surface) of the printed circuit board 22.

[0041] The power supply case 21 has a rectangular bottom wall 210 and a pair of first side walls 211 that protrude downward from both ends of the bottom wall 210 in the longitudinal direction along the short side of the bottom wall 210. The power supply case 21 also has a pair of second side walls 212 that protrude downward from both ends of the bottom wall 210 in the short side direction along the long side of the bottom wall 210 (see Figs. 6A and 7). That is, the power supply case 21 is formed in a long box shape having an opening in front (below) of the bottom wall 210. The socket of the power connector 23 protrudes outside the power supply case 21 through a window hole provided in one of the first side walls 211 (see Fig. 6).

[0042] The power supply unit 2 is attached to the bottom plate 30 of the support member 3 so that the opening of the power supply case 21 faces the second surface 30B of the bottom plate 30 (see FIGS. 5A and 6). The power supply case 21 is attached to the bottom plate 30 by an appropriate method such as screwing, crimping, or adhesive.

[0043] (2-2-4) Communication unit The communication unit 4 has a communication circuit section 40 and a communication connector 47 (see FIG. 7). The communication circuit section 40 receives a control signal transmitted through a signal line (not shown). The control signal is a signal that transmits control information such as a turn-on instruction, a turn-off instruction, and a dimming level. The communication circuit section 40 is communicatively connected to the control circuit 202 of the power supply device 20 through the communication connector 47. The communication circuit section 40 transmits the control information contained in the received control signal to the control circuit 202 through the communication connector 47. The control circuit 202 turns on or off the LED module 1, changes the dimming level, and so on, in accordance with the control information received from the communication circuit section 40. However, the communication circuit section 40 may be configured to perform wireless communication using infrared rays or radio waves as a communication medium instead of wired communication.

[0044] The communication unit 4 further includes a case 43 that houses the communication circuit section 40 and the communication connector 47 (see FIG. 5A). The case 43 is formed in a box shape from synthetic resin having electrical insulation properties. The case 43 is attached to the first side wall 211 of the power supply case 21 (the first side wall 211 opposite the power supply connector 23) (see FIG. 5A). However, the communication unit 4 may be attached to a portion other than the power supply case 21, for example, to the support member 3.

[0045] (2-2-5) Cover The cover 5 has a cover body 50 formed in a long semi-cylindrical shape, a pair of cover ends 54 attached to both ends of the cover body 50 in the longitudinal direction, a pair of protruding walls 51, and a pair of extending portions 53 (see Figs. 2, 3, and 6). 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 square tube shape.

[0046] The pair of extending portions 53 extend inward from both ends of the short side of the cover body 50 along the longitudinal direction of the cover body 50. The pair of projecting walls 51 extend upward from connecting pieces 531 (described later) of the pair of extending portions 53 along the longitudinal direction of the cover body 50 (see FIG. 6). A hook-shaped hook portion 52 is integrally provided on the upper end of each of the pair of projecting walls 51 along the longitudinal direction of the projecting walls 51. The cover body 50, the pair of projecting walls 51, and the pair of hook portions 52 are integrally formed of a synthetic resin having translucency, such as an acrylic resin or a polycarbonate resin. However, the cover body 50, the pair of projecting walls 51, and the pair of extending portions 53 may be formed of a material having translucency other than a synthetic resin, for example, an inorganic glass such as quartz glass.

[0047] The pair of cover ends 54 are formed in a semicircular plate shape in a plan view from the same light-transmitting material as the cover body 50. The pair of cover ends 54 are attached, one at each end in the longitudinal direction of the cover body 50. That is, both ends in the longitudinal direction of the cover body 50 are closed by the cover ends 54.

[0048] The cover 5 accommodates the support member 3 between a pair of protruding walls 51, and is attached to the support member 3 by hooking the hook portions 52 provided at the upper ends of the pair of protruding walls 51 onto the tips (upper ends) of a pair of side plates 31 of the support member 3 (see Figure 6).

[0049] The pair of extending portions 53 are configured to cover at least a part of the portion of the first surface 30A of the bottom plate 30 of the support member 3 that is exposed to the outside of the LED module 1 (see FIG. 6).

[0050] Each extension portion 53 has a main piece 530, a connecting piece 531, and a side piece 532 (see FIG. 6). The connecting piece 531 is formed in a rectangular flat plate shape and protrudes inward from both ends of the short side 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 in 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 plate 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 FIG. 6).

[0051] Here, the cover body 50 and the cover end 54 are configured to diffuse the light (illumination light) emitted from the LED module 1. Specifically, the synthetic resin forming the cover body 50 and the cover end 54 (or the entire cover 5) is filled with a filler having light diffusion properties, thereby imparting light diffusion properties to the cover body 50 and the cover end 54. Most of the light emitted from the LED module 1 (LED 10) enters the cover body 50 and the cover end 54 from the inner surfaces of the cover body 50 and the cover end 54, and is diffused by the filler while being emitted outside the cover 5 from at least a part of the outer surfaces of the cover body 50 and the cover end 54. However, a part of the light emitted from the LED module 1 is reflected by the inner surfaces of the cover body 50 and the cover end 54 and returns toward the support member 3. A part of the light reflected by the inner surfaces of the cover body 50 and the cover end 54 is reflected by the surfaces (lower surfaces) of the extension parts 53 of the cover 5, and then passes through the cover body 50 and the cover end 54. However, a part of the light emitted from the LED module 1 may be directly reflected by the surface (lower surface) of each extension portion 53.

[0052] Here, the extension portion 53 is preferably formed so that the reflectance of its surface (lower 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 to make the type or amount of filler filled in the synthetic resin forming the extension portion 53 different from the type or amount of filler filled in the synthetic resin forming the cover body 50. Alternatively, the surface (lower surface) of the extension portion 53 may be formed by two-layer two-color molding so that it has a higher reflectance to visible light than the back surface (upper surface) of the extension portion 53. In other words, the first layer including the back surface (upper surface) of the extension portion 53 may be formed of a synthetic resin filled with the same type and amount of filler as the cover body 50, and the second layer including the surface (lower surface) of the extension portion 53 may be formed of a synthetic resin filled with a different type of filler than the cover body 50 or the same type but a different amount of filler. Alternatively, the reflectance for visible light may be increased by applying paint to the surface of the extension 53, which is made of the same synthetic resin as the cover body 50. Thus, in the light source unit A1, by covering the protrusion 34 of the support member 3 with the extension 53 of the cover 5, the efficiency of extracting the light emitted from the LED module 1 to the outside of the cover 5 (extraction efficiency) can be improved.

[0053] (2-2-6) Heat conductive material The heat conductive member 7 is made of a good thermal conductor. The material for forming the heat conductive member 7 is preferably a metal such as aluminum, copper, iron, silver, gold, or brass. Note that the material for forming the heat conductive member 7 may be a material other than a metal, as long as it has a thermal conductivity of 60 W / (m·k) or more.

[0054] The heat conducting member 7 is made of the above-mentioned metal plate (for example, an aluminum plate) and formed into a rectangular shape (see Figs. 5B and 6). The heat conducting member 7 has a first portion 71 and a second portion 72 each formed into an elongated rectangular shape, and a connecting portion 73 formed into an elongated rectangular shape and connecting one end of the first portion 71 and the second portion 72 along the longitudinal direction.

[0055] The heat conductive member 7 is attached to the support member 3 such that the first portion 71 is in close contact with the second surface 30B of the bottom plate 30 (see FIG. 3). However, the heat conductive member 7 may be attached to the storage section 60 of the device body 6 instead of to the support member 3. The first portion 71 (or the second portion 72) can be attached to the bottom plate 30 (or the storage section 60) by a method such as screwing, bonding, or welding.

[0056] Here, the heat conductive member 7 is disposed at a position not overlapping with the mounting hole 63 and the power supply hole 64 as viewed from the top and bottom when the light source unit A1 is attached to the fixture body 6 (see Figs. 3 and 5B). In other words, the heat conductive member 7 can be accommodated in the accommodation section 60 of the fixture body 6 without interfering with the hanging bolt 90 inserted through the mounting hole 63 and the power supply line 93 inserted through the power supply hole 64.

[0057] (2-3) Installation of lighting fixtures The lighting fixture B1 is installed on the ceiling of the room in the following procedure.

[0058] First, the power cable 92 drawn from the ceiling S1 is drawn into the housing 60 through the power hole 64 at the center of the fixture body 6 (see FIG. 2). Then, a pair of suspension bolts 90 provided in the ceiling S1 are inserted into a pair of mounting holes 63 in the fixture body 6, and nuts 91 are fastened to the suspension bolts 90 inserted into the mounting holes 63 via washers (not shown), thereby attaching the fixture body 6 to the ceiling S1. Then, the power cable 92 drawn from the power hole 64 is electrically connected to the terminal block 65 (see FIGS. 5A and 5B).

[0059] Next, the pair of hooking fittings 37 of the light source unit A1 are inserted into the pair of hooking holes 600 of the fixture body 6, and the tip portions of the hooking fittings 37 are hooked onto the edges of the hooking holes 600 in the side wall of the storage section 60, thereby temporarily hanging the light source unit A1 on the fixture body 6 (see FIG. 8). In this temporarily hanging state, the power connector 94 at the tip of the power line 93 connected to the terminal block 65 is electrically connected to the power connector 23 of the power supply unit 2.

[0060] Next, the tip portions of a pair of hook springs 38 made of torsion coil springs are hooked one by one to a pair of hook portions 601 of the storage section 60 (see FIG. 9). Then, when the light source unit A1 is lifted while rotating with the hook fittings 37 abutting the edge of the hook hole 600 as a fulcrum, the deformed hook springs 38 are restored to their original state. As a result, the light source unit A1 is held in the fixture body 6 with the power supply unit 2 and the communication unit 4 housed in the storage section 60 by the spring forces of the hook fittings 37 hooked to the edge of the hook hole 600 and the hook springs 38 hooked to the hook portions 601 (see FIGS. 1 and 3).

[0061] The lighting fixture B1 is installed on the ceiling through the above steps.

[0062] Here, when the lighting fixture B1 is installed on the ceiling, the two hanging bolts 90, nuts 91, and washers (not shown) are all located between the power supply unit 2 and the communication unit 4 of the light source unit A1 in the longitudinal direction of the fixture body 6 (see FIGS. 5A and 5B). In other words, the lighting fixture B1 can ensure a sufficient insulation distance between the two hanging bolts 90, nuts 91, and washers (not shown) and the power supply unit 2 and the communication unit 4.

[0063] (2-4) Advantages of the embodiment As explained in the prior art, even in the light source unit A1, there is a possibility that abnormal noise will occur due to the difference in thermal expansion coefficient between the metallic support member 3 and the synthetic resin cover 5. That is, 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 at the contact surface between the support member 3 and the cover 5, the distortion generated in the cover 5 is suddenly released. When the distortion of the cover 5 is suddenly released, friction noise accompanied by vibration is generated at the contact surface of the cover 5 with the support member 3 (stick-slip phenomenon). It is considered that the greater the temperature rise of the two members (support member 3 and cover 5), the more likely abnormal noise due to the stick-slip phenomenon will occur.

[0064] Therefore, the light source unit A1 suppresses a rise in temperature of the support member 3 and the cover 5 by contacting the support member 3 and the heat conductive member 7 at one or more points and conducting the heat generated by the LED module 1 while it is turned on to the heat conductive member 7. As a result, the light source unit A1 can suppress a rise in temperature of the support member 3 and the cover 5 and suppress abnormal noise.

[0065] In the light source unit A1, the support member 3 has a long bottom plate 30 that supports the LED module 1 on the first surface 30A side, and a pair of side plates 31 that protrude from both ends of the short side of the bottom plate 30 towards the second surface 30B side. The cover 5 is made of a material (synthetic resin) that has a large thermal expansion coefficient compared to the material (metal) that forms the support member 3, and is supported by the support member 3 so as to contact the side plates 31.

[0066] Thus, in the light source unit A1, abnormal noise generated from the contact portion between the cover 5 and the side plate 31 of the support member 3 can be suppressed.

[0067] Furthermore, the thermal conduction member 7 has a first portion 71 in contact with the bottom plate 30, a second portion 72 facing the second surface 30B across the first portion 71, and a connecting portion 73 connecting the first portion 71 and the second portion 72.

[0068] Thus, since the light source unit A1 includes the heat conductive member 7 having the above-described configuration, it is possible to further suppress the temperature rise of the support member 3 and the cover 5 by dissipating heat from the respective surfaces of the first portion 71, the second portion 72, and the connecting portion 73. As a result, the light source unit A1 can suppress the temperature rise of the support member 3 and the cover 5, and further suppress abnormal noise.

[0069] Moreover, the heat conductive member 7 is in contact with the fixture body 6 and the support member 3 at one or more points. Thus, by bringing the heat conductive member 7 into contact with the fixture body 6 at one or more points, the light source unit A1 can dissipate heat generated by the light source to the fixture body 6 via the heat conductive member 7, and as a result, it is possible to suppress temperature rise in the support member 3 and the cover 5 and suppress abnormal noise.

[0070] (3) Modifications of the embodiment Next, several modified examples of the light source unit A1 and the lighting fixture B1 according to the embodiment will be described. However, the basic configuration of the light source unit A1 and the lighting fixture B1 of each modified example described below is common to the basic configuration of the light source unit A1 and the lighting fixture B1 according to the embodiment. Therefore, the same reference numerals will be used to designate configurations that are common to the basic configuration of the light source unit A1 and the lighting fixture B1 according to the embodiment, and illustrations and descriptions thereof will be omitted as appropriate. In the following description, "substantially common configurations" refers to configurations that are slightly different in shape, size, etc., but have common functions. In addition, each modified example described below can be appropriately combined with the embodiment and other modified examples.

[0071] (3-1) Variation 1 Illumination fixture B1 of Modification 1 is characterized by the structure of fixture body 6. Fixture body 6 in Modification 1 is attached to ceiling S1 so as to cover embedding hole F1 provided in ceiling S1 (see FIGS. 10 and 11).

[0072] The fixture body 6 in the first modification includes a top plate unit 68 and a reflecting plate unit 69, as shown in FIG.

[0073] The top plate unit 68 has a top plate 680 formed in a long rectangular flat plate shape, and a pair of side walls 681 that rise downward from both ends of the short side direction of the top plate 680 along the longitudinal direction of the top plate 680. It is preferable that the top plate unit 68 is formed integrally with the top plate 680 and the pair of side walls 681 by bending a metal plate such as a zinc steel plate. The top plate 680 has a plurality of mounting holes 63 and a plurality of power supply holes 64. A terminal block 65 is attached to the lower surface of the top plate 680. A plurality of power supply lines 93 are electrically connected to the terminal block 65. A power supply connector 94 is attached to the tip of the plurality of power supply lines 93 (see FIG. 10). Furthermore, a hook portion 601 is provided on each of both ends of the longitudinal direction of the top plate 680. At both ends in the longitudinal direction of one side wall 681, a groove 682 is provided which becomes the hanging hole 600 when the top plate unit 68 and the reflector unit 69 are joined together.

[0074] The reflecting plate unit 69 has a pair of first reflecting plates 691, a pair of second reflecting plates 692, a frame body 693, and a pair of protruding pieces 694.

[0075] The pair of first reflectors 691 are each formed in a rectangular flat plate shape. In addition, a protruding piece 694 protrudes upward from the upper end of each of the pair of first reflectors 691. The pair of protruding pieces 694 are each formed in an inverted L shape when viewed in the longitudinal direction (see FIG. 10). The pair of second reflectors 692 are each formed in a trapezoidal flat plate shape (see FIG. 10). The pair of second reflectors 692 have two oblique sides connected to the longitudinal end of the first reflector 691 (see FIG. 10). The frame body 693 is formed in a long rectangular frame shape. The frame body 693 is connected to the lower ends of the pair of first reflectors 691 and the pair of second reflectors 692. In other words, the reflector unit 69 is formed in a long square pyramid shape with the upper and lower faces open.

[0076] The fixture body 6 is configured by fixing a pair of protrusions 694 to a pair of side walls 681 and connecting the top plate unit 68 to the reflecting plate unit 69. At both ends of the fixture body 6 in the longitudinal direction, the areas surrounded by the top plate unit 68 and the pair of second reflecting plates 692 are open.

[0077] In the fixture main body 6 in the first modification, the top plate unit 68 and the reflector unit 69 are inserted into the embedding hole F1 provided in the ceiling S1, and the top plate 680 of the top plate unit 68 is attached to the hanging bolt 90 hanging down from the frame. The frame body 693 abuts against the lower surface (ceiling surface) of the ceiling S1 from below, covering and hiding the edge of the embedding hole F1 (see FIG. 11).

[0078] The light source unit A1 in the first modification is the same as the light source unit A1 according to the embodiment. Therefore, the light source unit A1 is held in the fixture body 6 by the spring force of the hook fitting 37 hooked on the edge of the hook hole 600 and the hook spring 38 hooked on the hook portion 601, as in the embodiment.

[0079] In lighting device B1 of modification 1 as well, similarly to the embodiment, it is possible to suppress the temperature rise of supporting member 3 and cover 5 and thereby suppress abnormal noise.

[0080] (3-2) Variation 2 The light source unit A1 of the second modification is characterized in that the heat conductive member 7 is in contact with the power supply case 21 at one or more points.

[0081] As shown in FIG. 12, the heat conductive member 7 in the second modification has a third portion 74 that protrudes in the longitudinal direction of the second portion 72 from one end of the second portion 72 in the longitudinal direction (the right end in FIG. 12).

[0082] The third portion 74 is formed in a flat plate shape. The third portion 74 contacts the upper surface of the power supply case 21 (see FIG. 12). However, the third portion 74 may protrude from the connecting portion 73. The third portion 74 may protrude from both the second portion 72 and the connecting portion 73.

[0083] Thus, in the light source unit A1 of the second modification, the heat conductive member 7 is in contact with the power supply case 21 of the power supply unit 2 at one or more points, so that the heat generated by the power supply device 20 that is lighting the LED module 1 can be dissipated to the outside of the fixture body 6 through the heat conductive member 7. As a result, the light source unit A1 of the second modification can further suppress the temperature rise of the support member 3 and the cover 5, and further suppress abnormal noise by suppressing the temperature rise of the support member 3 and the cover 5.

[0084] (3-3) Variation 3 The light source unit A1 of the third modification is characterized in that it further includes a contact member 8 that is in close contact with each of the heat conductive member 7 and the supporting member 3, as shown in FIG.

[0085] The adhesion member 8 is composed of a material called a thermally conductive sheet or a heat dissipation sheet. A typical thermally conductive sheet is made by incorporating a highly thermally conductive filler into a flexible resin sheet mainly made of acrylic resin or silicone resin, thereby imparting thermal conductivity to the resin sheet, which does not originally have thermal conductivity.

[0086] One of the adhesion members 8 utilizes the flexibility of the main agent of the thermally conductive sheet to adhere to the second surface 30B of the bottom plate 30 of the support member 3 and the lower surface of the first portion 71 of the thermally conductive member 7. The other adhesion member 8 adheres to the upper surface of the second portion 72 and the inner bottom surface of the storage section 60 of the device main body 6 (not shown).

[0087] Thus, in the light source unit A1 of the modified example 3, the contact member 8 is disposed between the heat conductive member 7 and the support member 3, and the contact member 8 is brought into close contact with the heat conductive member 7 and the support member 3, thereby promoting the transfer of heat from the support member 3 to the heat conductive member 7. As a result, the light source unit A1 of the modified example 3 can suppress the temperature rise of the support member 3 and the cover 5, thereby further suppressing abnormal noise.

[0088] (3-4) Variation 4 Illumination device B1 of modification 4 is characterized in that power supply unit 2 and heat conductive member 7 are provided in device body 6, and heat conductive member 7 is in contact with support member 3 and device body 6 at one or more points, respectively.

[0089] The power supply unit 2 in the fourth modification is attached to the housing 60 so that the opening of the power supply case 21 faces the inner bottom surface (upper surface) of the housing 60 of the device body 6 (see FIG. 14). The power supply case 21 is attached to the housing 60 by an appropriate method such as screwing, crimping, or adhesive.

[0090] The heat conductive member 7 in the fourth modification is attached to the housing portion 60 of the fixture body 6, and is in contact with the support member 3 and the fixture body 6 at one or more points. Thus, heat generated from the LED module 1 is transferred from the support member 3 to the heat conductive member 7, and further to the fixture body 6.

[0091] Lighting device B1 in modification 4 is configured as described above, and since power supply unit 2 is not in direct contact with support member 3, it is possible to reduce the effect of heat generated by power supply device 20 on support member 3 and cover 5. As a result, lighting device B1 in modification 4 can suppress temperature rise in support member 3 and cover 5, thereby further suppressing abnormal noise.

[0092] (3-5) Variation 5 The light source unit A1 of the fifth modification is characterized by the structure of the heat conductive member .

[0093] The heat conducting member 7 in the fifth modification is formed in a rectangular tube shape (see FIG. 15A). The heat conducting member 7 in the fifth modification may be formed in an H shape (see FIG. 15B). The heat conducting member 7 in the fifth modification may be formed in a shape in which a plurality of flat plates (four in the illustrated example) are arranged in parallel at equal intervals, and the central portions of the flat plates are connected by another flat plate (see FIG. 15C). Alternatively, the heat conducting member 7 in the fifth modification may be formed in a square prism shape (see FIG. 15D), or in a shape in which two non-adjacent side surfaces of the square prism are V-shaped (see FIG. 15E).

[0094] Thus, the light source unit A1 and lighting fixture B1 of variant example 5 can suppress temperature rise in the support member 3 and the cover 5 and reduce abnormal noise by using heat conduction members 7 of various shapes as shown in Figures 15A-15E.

[0095] (3-6) Variation 6 The lighting fixture B1 of the sixth modification is characterized by the structure of the fixture body 6.

[0096] In the device main body 6 in the sixth modification, a large number of projections and recesses are formed on the outer bottom surface (upper surface) of the housing portion 60 to increase the surface area and improve the heat dissipation.

[0097] For example, a large number of projections and recesses may be formed on the outer bottom surface of the storage section 60 by arranging rectangular prism-shaped projections at equal intervals (see FIG. 16A). Alternatively, a large number of projections and recesses may be formed on the outer bottom surface of the storage section 60 by arranging triangular prism-shaped projections at equal intervals (see FIG. 16B). Alternatively, a large number of projections and recesses may be formed on the outer bottom surface of the storage section 60 by arranging semi-elliptical cylindrical projections at equal intervals (see FIG. 16C).

[0098] Therefore, in the lighting device B1 of variant example 6, by forming a large number of irregularities on the outer bottom surface (top surface) of the storage section 60, the surface area is increased and heat dissipation properties are improved, which in turn suppresses the temperature rise of the support member 3 and the cover 5 and reduces abnormal noise.

[0099] The light source unit A1 and the lighting device B1 according to the above-described embodiment and the modified examples thereof may include a plurality of heat conductive members 7. For example, the light source unit A1 may have one or more heat conductive members 7 disposed in adjacent positions across the power supply unit 2 in the longitudinal direction of the support member 3.

[0100] (4) Summary The lighting device (light source unit A1) according to a first embodiment of the present disclosure includes a light source (LED module 1) and a support member (3) having a first surface (30A) and a second surface (30B) opposite the first surface (30A) and supporting the light source on the side of the first surface (30A). The lighting device according to the first embodiment includes a cover (5) that is translucent and supported by the support member (3) so as to cover the light source, and one or more heat conductive members (7) arranged on the second surface (30B) side of the support member (3). The heat conductive members (7) contact the support member (3) at one or more points.

[0101] The lighting device according to the first aspect suppresses temperature rise of the supporting member (3) and the cover (5) by bringing the supporting member (3) and the heat conductive member (7) into contact with each other at one or more points and conducting heat generated by the light source while it is turned on to the heat conductive member (7). As a result, the lighting device according to the first aspect can suppress temperature rise of the supporting member (3) and the cover (5) and suppress abnormal noise.

[0102] The lighting device according to the second aspect of the present disclosure can be realized by combining with the first aspect. In the lighting device according to the second aspect, the light source preferably has one or more LED modules (1) in which a plurality of LEDs (10) are mounted on a long substrate (11). The support member (3) preferably has a long bottom plate (30) that supports the LED module (1) on the first surface (30A) side, and a pair of side plates (31) that protrude from both ends of the short side of the bottom plate (30) to the second surface (30B) side. The cover (5) is preferably made of a material that has a large thermal expansion coefficient compared to the material that forms the support member (3), and is preferably supported by the support member (3) so as to be in contact with the side plates (31).

[0103] The lighting device according to the second aspect can suppress abnormal noise generated from the contact portion between the cover (5) and the side plate (31) of the support member (3).

[0104] An illumination device according to a third aspect of the present disclosure can be realized by combining with the second aspect. In the illumination device according to the third aspect, it is preferable that the heat-conducting member (7) has a first portion (71) in contact with the bottom plate (30), a second portion (72) facing the second surface (30B) with the first portion (71) in between, and a connecting portion (73) connecting the first portion (71) and the second portion (72).

[0105] The lighting device according to the third aspect can further suppress the temperature rise of the support member (3) and the cover (5) by dissipating heat from the respective surfaces of the first portion (71), the second portion (72), and the connecting portion (73). As a result, the lighting device according to the third aspect can suppress the temperature rise of the support member (3) and the cover (5) and further suppress abnormal noise.

[0106] An illumination device according to a fourth aspect of the present disclosure can be realized by combining with any one of the first to third aspects. The illumination device according to the fourth aspect preferably further includes a power supply unit (2) arranged on the second surface (30B) side of the support member (3). The power supply unit (2) preferably includes a power supply device (20) that supplies power to the light source to light it, and a power supply case (21) that houses the power supply device (20). The heat conduction member (7) preferably contacts the power supply case (21) at one or more points.

[0107] In the lighting device according to the fourth aspect, the heat conductive member (7) is in contact with the power supply case (21) at one or more points, and therefore heat generated by the power supply device (20) that is turning on the light source can be released through the heat conductive member (7). As a result, the lighting device according to the fourth aspect can further suppress the temperature rise of the cover (5). As a result, the lighting device according to the fourth aspect can suppress the temperature rise of the support member (3) and the cover (5) and further suppress abnormal noise.

[0108] An illumination device according to a fifth aspect of the present disclosure can be realized by combining with any one of the first to fourth aspects. It is preferable that the illumination device according to the fifth aspect further includes a contact member (8) that contacts with both the heat conduction member (7) and the support member (3).

[0109] The lighting device according to the fifth aspect has a contact member (8) disposed between the heat conductive member (7) and the support member (3) and the contact member (8) is brought into contact with the heat conductive member 7 and the support member (3), thereby facilitating the transfer of heat from the support member (3) to the heat conductive member (7). As a result, the lighting device according to the fifth aspect can suppress the temperature rise of the support member (3) and the cover (5) and further suppress abnormal noise.

[0110] A lighting fixture (B1) according to a sixth aspect of the present disclosure includes a lighting device (light source unit A1) according to any one of the first to fifth aspects, and a fixture body (6) that detachably supports the lighting device.

[0111] The lighting fixture (B1) of the sixth aspect includes the lighting device (light source unit A1) of any one of the first to fifth aspects, and therefore can suppress temperature rise in the support member (3) and the cover (5) and thereby suppress abnormal noise.

[0112] A lighting fixture (B1) according to a seventh aspect of the present disclosure can be realized by combining with the sixth aspect. In the lighting fixture (B1) according to the seventh aspect, it is preferable that the heat-conducting member (7) contacts the fixture body (6) at one or more points.

[0113] The lighting fixture (B1) according to the seventh aspect can suppress temperature rise in the support member (3) and the cover (5) and further suppress abnormal noise.

[0114] A lighting fixture (B1) according to an eighth aspect of the present disclosure includes a lighting device (light source unit A1), a fixture body (6) that detachably supports the lighting device, and a heat-conducting member (7). The lighting device includes a light source (LED module 1), a support member (3), and a cover (5). The support member (3) has a first surface (30A) and a second surface (30B) opposite to the first surface (30A), and supports the light source on the side of the first surface (30A). The cover (5) is translucent and is supported by the support member (3) so as to cover the light source. The heat-conducting member (7) contacts the support member (3) and the fixture body (6) at one or more points.

[0115] In the lighting fixture (B1) according to the eighth aspect, the heat-conducting member (7) is in contact with the support member (3) and the fixture body (6) at one or more points, and therefore the heat generated by the light source can be thermally conducted to the fixture body (6) through the heat-conducting member (7). As a result, the lighting fixture (B1) according to the eighth aspect can suppress temperature rise in the support member (3) and the cover (5) and further suppress abnormal noise. [Explanation of symbols]

[0116] A1 Light source unit (lighting device) B1 Lighting equipment 1 LED module (light source) 2 Power supply units 3 Supporting member 5 Cover 6. Equipment body 7. Heat Conduction Materials 8 Adhesive Materials 10 LED 11 Substrate 20 Power supply 21 Power Supply Case 30A 1st side 30B 2nd side 71 Part 1 72 Part 2 73 Connecting part

Claims

1. A light source; a support member having a first surface and a second surface opposite to the first surface, the support member supporting the light source on the side of the first surface; a cover that is translucent and supported by the support member so as to cover the light source; one or more thermally conductive members disposed on the second surface of the support member; Equipped with The heat conductive member is in contact with the support member at one or more points. Lighting equipment.

2. The light source includes one or more LED modules each having a plurality of LEDs mounted on a long substrate; the support member has a long bottom plate that supports the LED module on the first surface side, and a pair of side plates that protrude from both ends of the bottom plate in a short side direction toward the second surface side, the cover is made of a material having a larger thermal expansion coefficient than a material forming the support member, and is supported by the support member so as to be in contact with the side plate; 2. The lighting device according to claim 1.

3. The heat conducting member has a first portion in contact with the bottom plate, a second portion facing the second surface with the first portion interposed therebetween, and a connecting portion connecting the first portion and the second portion.

3. The lighting device according to claim 2.

4. Further, a power supply unit is provided on the second surface side of the support member, The power supply unit includes a power supply device that supplies power to the light source to light it, and a power supply case that accommodates the power supply device; The thermally conductive member contacts the power supply case at one or more points. An illumination device according to any one of claims 1 to 3.

5. The heat conductive member and the support member may be attached to each of the heat conductive member and the support member. An illumination device according to any one of claims 1 to 3.

6. A lighting device according to any one of claims 1 to 3; An apparatus body that detachably supports the lighting device; Equipped with Lighting fixtures.

7. The heat conductive member contacts the device body at one or more points.

7. A lighting device according to claim 6.

8. A lighting device; An apparatus body that detachably supports the lighting device; A thermally conductive member; Equipped with The lighting device includes: A light source; a support member having a first surface and a second surface opposite to the first surface, the support member supporting the light source on the side of the first surface; a cover that is translucent and supported by the support member so as to cover the light source; having The heat conducting member is in contact with the support member and the device body at one or more points, Lighting fixtures.

Images