JP2020042919A - Luminaire - Google Patents

Abstract

To provide a luminaire which is advantageous when achieving both suppressing a temperature rise of a light source and suppressing an increase in dimension of the entire luminaire in the case where a plurality of lighting units are connected.SOLUTION: A luminaire 1B includes a plurality of lighting units 2 which are connectable. The lighting unit 2 includes: a unit body 3; a light source substrate supported by the unit body 3; and heat radiation fins 5 supported by the unit body 3, and for dissipating the heat generated in the light source substrate. The unit body 3 includes joint parts 6a, 7a facing the other lighting unit 2, when the lighting unit 2 is connected to the other lighting unit 2. The joint parts 6a, 7a have ventilation parts 6b, 7b formed by a cutout or an opening. When the plurality of lighting units 2 are connected, air can move between the outside space of the unit body 3 and the heat radiation fins 5 through the ventilation parts 6b, 7b.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a lighting device.

  For example, a lighting device using a semiconductor light source such as a light emitting diode (LED) is widely used. When the temperature of a semiconductor light source increases due to heat generation, energy efficiency is reduced and the life is shortened. The lighting device includes a radiation fin that dissipates heat of the light source in order to suppress a rise in the temperature of the light source.

  Patent Literature 1 proposes a structure that configures a large-luminance illuminating device by connecting a plurality of lighting units while sharing parts.

Japanese Patent No. 6276495

  In the lighting device disclosed in Patent Document 1, a plurality of lighting units are connected so as to provide a gap between the lighting units. For this reason, there is a problem that it is difficult to reduce the size of the entire lighting device.

  Further, assuming that a lighting device in which a plurality of lighting units disclosed in Patent Literature 1 are connected without providing a gap is configured, it becomes difficult for air to flow to the radiation fins in the central portion of the lighting device. Easy to rise. When the temperature of the light source rises, there is a possibility that the energy saving property is reduced or the life of the lighting device is shortened.

  SUMMARY An advantage of some aspects of the invention is to reduce a temperature rise of a light source when a plurality of lighting units are connected, and to suppress an increase in size of an entire lighting device. It is an object of the present invention to provide a lighting device which is advantageous in achieving both.

  The lighting device according to the present invention is a lighting device including a plurality of connectable lighting units, wherein the lighting unit is supported by the unit body, a light source board supported by the unit body, and generated by the light source board. Radiating fins for dissipating the heat, the unit body includes a joint facing the other lighting unit when the lighting unit is connected to the other lighting unit, and the joint is formed by a notch or an opening. A plurality of lighting units connected to each other so that air can move between the external space of the unit main body and the radiation fins when the plurality of lighting units are connected.

  According to the present invention, when a plurality of lighting units are connected, a lighting device that is advantageous in suppressing both a rise in the temperature of the light source and suppressing an increase in the size of the entire lighting device is provided. Can be provided.

FIG. 2 is a perspective view of the lighting device according to Embodiment 1 as viewed obliquely from below. FIG. 2 is an exploded perspective view of a part of the lighting device shown in FIG. 1 as viewed obliquely from above. FIG. 2 is a cross-sectional plan view showing a part of the lighting device shown in FIG. 1. FIG. 2 is a side view showing a part of the lighting device shown in FIG. 1. It is the perspective view which looked at the illuminating device by Embodiment 2 from diagonally below. FIG. 13 is a perspective view of the lighting device according to Embodiment 3 as viewed obliquely from above. FIG. 13 is a perspective view of the lighting device according to Embodiment 4 as viewed obliquely from above. FIG. 15 is a perspective view of a lighting device according to a fifth embodiment as viewed obliquely from above. FIG. 17 is a perspective view of the lighting device according to the sixth embodiment as viewed obliquely from above.

  Hereinafter, embodiments will be described with reference to the drawings. In the drawings, common or corresponding elements are denoted by the same reference numerals, and redundant description will be simplified or omitted. The present disclosure may include any combination of configurations that can be combined among the configurations described in the following embodiments.

Embodiment 1 FIG.
FIG. 1 is a perspective view of lighting device 1A according to Embodiment 1 as viewed obliquely from below. Illumination device 1A according to the first embodiment shown in FIG. 1 is installed on a ceiling and emits light downward. In the following description, the upward and downward directions are specified based on the posture when the lighting device 1A is used. The lighting device 1A according to the present embodiment is particularly suitable for being used by being installed on a high ceiling such as a factory, a warehouse, a gymnasium, and a sports facility.

  The lighting device 1A includes a lighting unit 2. The lighting device 1A in the present embodiment includes only one lighting unit 2, but as described in a later embodiment, a lighting device including a plurality of connected lighting units 2 can be configured. It is.

  The lighting unit 2 includes a unit main body 3, a light source substrate 4, and a radiation fin 5 that dissipates heat generated in the light source substrate 4. The light source substrate 4 and the radiation fins 5 are supported by the unit body 3. The lamp axis AX corresponds to the central axis of the lighting unit 2. Typically, lighting device 1A is installed such that lamp axis AX is parallel to a vertical line.

  The unit main body 3 includes a plate-shaped unit base 6, a plate-shaped unit cover 7, and a column 8. The surfaces of the unit base 6 and the unit cover 7 are perpendicular to the lamp axis AX.

  In the following description, a direction parallel to the lamp axis AX is referred to as a “light axis direction”. The shapes of the unit base 6 and the unit cover 7 when viewed from the lamp axis direction are substantially square. The unit base 6 and the unit cover 7 are connected to each other by a support column 8 extending parallel to the light axis AX. The columns 8 are installed at four corners of the unit base 6 and the unit cover 7, respectively.

  As a modification, the shapes of the unit base 6 and the unit cover 7 when viewed from the lamp axis direction may be substantially rectangular, circular, or elliptical. It is desirable that the unit base 6 and the unit cover 7 have substantially the same shape and size when viewed from the lamp axis direction.

  The light source substrate 4 is fixed to the lower surface of the unit base 6. The light source substrate 4 includes a light emitting element 4a serving as a light source. In the present embodiment, a plurality of light emitting elements 4a are mounted on one light source substrate 4. On the light source substrate 4, a conductive pattern for supplying power to the plurality of light emitting elements 4a is formed. The light source substrate 4 is provided so as to be able to conduct heat to the lower surface of the unit base 6. The heat generated by the light emitting element 4a is conducted from the light source substrate 4 to the unit base 6. The light source substrate 4 may be in direct contact with the lower surface of the unit base 6, or may be in contact with the lower surface of the unit base 6 via a heat conductive material. In this specification, the heat conductive material may be, for example, any of a heat conductive grease, a heat conductive sheet, a heat conductive adhesive, and a heat conductive double-sided pressure-sensitive adhesive tape.

  The light source substrate 4 may use a light emitting diode (LED) as the light emitting element 4a. For example, the light source substrate 4 is at least one of a surface mount type LED package, a shell type LED package, an LED package with a light distribution lens, an LED of a chip scale package, and an LED package of a chip on board (COB) type. May be used. Further, the light source substrate 4 is not limited to one using LEDs, but may be one using an organic electroluminescence (EL) element or a semiconductor laser, for example.

  A plurality of heat radiation fins 5 are arranged on the unit base 6. The unit base 6 and the radiation fins 5 cool the light emitting element 4a by dissipating the heat generated in the light emitting element 4a to the surrounding air. The radiation fins 5 protrude from the surface of the unit base 6 opposite to the light source substrate 4. That is, the radiation fins 5 protrude from the upper surface of the unit base 6. The radiation fin 5 in the present embodiment has a plate-like shape. The surface of the radiation fin 5 is perpendicular to the lamp axis AX.

  In the present embodiment, a plurality of radiation fins 5 are radially arranged when viewed from the lamp axis direction. Each of the plurality of radiation fins 5 extends outward from the central region of the unit base 6. In the present embodiment, two adjacent heat radiation fins 5 are formed by one component formed by bending one sheet metal into a U-shape. The part is fixed to the unit base 6. The configuration is not limited to such a configuration, and the radiation fins 5 may be formed as separate components. The method of fixing the radiation fins 5 to the unit base 6 may be any method such as caulking, screwing, bonding, welding, or brazing. Further, the unit base 6 and the radiation fins 5 may be integrally formed by, for example, a die casting method. Further, as a modification, a plurality of plate-shaped heat radiation fins 5 may be arranged in parallel with each other. As another modification, the radiation fin 5 may be a pin fin having a pin-like shape.

  The heat generated by the light emitting elements 4 a of the light source substrate 4 is conducted to the unit base 6, and further conducted from the unit base 6 to the radiation fins 5. Heat is dissipated from the surfaces of the unit base 6 and the radiation fins 5 to the surrounding air. By increasing the surface area of the heat sink by the unit base 6 and the radiation fins 5, the heat generated in the light emitting element 4a can be efficiently dissipated. As a result, the temperature of the light emitting element 4a can be lowered, so that the energy efficiency, that is, the luminous efficiency of the light emitting element 4a is improved, and the life of the light emitting element 4a can be extended.

  In addition, the heat of the unit base 6 is transmitted to the unit cover 7 through the columns 8. In the present embodiment, heat can be dissipated from the surface of the unit cover 7 to the surrounding air, which is more advantageous in lowering the temperature of the light emitting element 4a. As a modification, a heat pipe for transferring heat from the unit base 6 to the radiation fins 5 may be provided.

  In the present embodiment, an airflow that flows along the surface of the radiation fin 5 is generated by natural convection. As a modified example, a blower fan that blows air to the radiation fins 5 may be provided to forcibly generate an airflow.

  The unit main body 3 is typically made of a metal material such as aluminum, aluminum alloy, stainless steel, copper, and copper alloy. As a modification, at least a part of the unit body 3 may be made of a heat conductive resin material. The heat conductive resin material may be a material in which a heat conductive filler is kneaded into the resin material.

  The unit cover 7 is arranged on the plurality of radiating fins 5. The unit cover 7 is located on the opposite side of the unit base 6 with the plurality of radiating fins 5 interposed therebetween. The unit cover 7 covers the plurality of radiating fins 5 without contacting the plurality of radiating fins 5. According to the present embodiment, the following effects can be obtained by providing the unit cover 7. By receiving dust or oil or the like falling from above the lighting device 1A by the unit cover 7, it is possible to prevent dirt made of dust or oil or the like from adhering and accumulating on the upper surface of the unit base 6 and the surfaces of the plurality of radiation fins 5. . The reduction in the heat radiation efficiency of the unit base 6 and the heat radiation fins 5 due to the influence of the dirt can be reliably reduced. When the lighting device 1A is installed at a high place such as a ceiling, it is difficult to frequently clean the unit base 6 and the radiation fins 5. Even if the unit base 6 and the radiation fins 5 are not frequently cleaned, the unit cover 7 can prevent the dirt from being deposited on the upper surface of the unit base 6 and the surfaces of the plurality of radiation fins 5.

  By passing air through the opening formed between the unit base 6 and the unit cover 7, the air can move between the internal space of the unit main body 3 where the radiation fins 5 are located and the external space of the unit main body 3. It is. Thereby, an excellent heat radiation effect can be obtained.

  The lighting device 1A of the present embodiment includes a power supply device 9. The power supply device 9 includes a housing having a substantially rectangular parallelepiped outer shape, a circuit board disposed inside the housing, and the like. The power supply 9 is fixed to the upper surface of the unit cover 7. The power supply device 9 includes a lighting circuit that generates DC power for lighting the light emitting element 4a. The lighting circuit of the power supply device 9 includes, for example, a power supply circuit that generates DC power from AC power supplied from a commercial power supply. When power is supplied from the power supply device 9 to the light source substrate 4 via the power supply line, the light emitting element 4a is turned on. As a modification, the lighting device 1A may not include the power supply device 9 as described above. That is, lighting device 1A may be configured to light up light emitting element 4a by receiving a supply of DC power from a power supply device arranged outside lighting device 1A.

  The illuminating device 1 </ b> A according to the present embodiment includes a translucent cover 10. The light transmitting cover 10 covers the entire light source substrate 4. The light emitted from the light emitting element 4a passes through the light transmitting cover 10 and is emitted to the outside of the lighting device 1A. The translucent cover 10 is attached to the unit base 6. According to the present embodiment, the provision of the light-transmitting cover 10 can reliably protect the light source substrate 4 from dirt or water. The translucent cover 10 may be made of a transparent material that transmits light specularly. Alternatively, the light transmitting cover 10 may be one that diffuses and transmits light. The translucent cover 10 may be made of, for example, a resin material such as a polycarbonate resin, an acrylic resin, or a polystyrene resin, or a glass material. The surface of the light-transmitting cover 10 may be subjected to a coating process such as a hard coating process, which is advantageous in suppressing aging. The translucent cover 10 may have waterproofness. A waterproof sealing material or an adhesive may be provided at the joint between the light transmitting cover 10 and the unit base 6. The sealing material or the adhesive may be made of, for example, a soft resin material, a silicone-based sealing material, a rubber-based material, or the like.

  The lighting device 1 </ b> A according to the present embodiment includes a reinforcing member 11. The reinforcing member 11 can be attached to the unit main body 3 so as to bridge between the unit base 6 and the unit cover 7. In the present embodiment, the provision of the reinforcing member 11 can improve the strength and rigidity of the lighting device 1A. In the present embodiment, the reinforcing members 11 are installed at two locations located on opposite sides of the lamp axis AX.

  The reinforcing member 11 includes a first closing portion 11a fixed to the unit base 6, a second closing portion 11b fixed to the unit cover 7, and a bridging portion 11c connecting the first closing portion 11a and the second closing portion 11b. And The first closing portion 11a has a plate-like shape parallel to the surface of the unit base 6. The second closing portion 11b has a plate-like shape parallel to the surface of the unit cover 7. The bridge portion 11c has a plate-like shape extending parallel to the lamp axis AX.

  The illumination device 1A according to the present embodiment includes an arm 12. The arm 12 is connected to the reinforcing member 11. The arm 12 supports the unit body 3 via the reinforcing member 11. The arm 12 has an elongated plate-like base 12a and a pair of support parts 12b protruding from both ends of the base 12a. The arm 12 may be made by bending a metal plate. The support portion 12b protrudes in a direction perpendicular to the longitudinal direction of the base portion 12a. By fixing the base 12a to a mounting surface such as a ceiling surface or a beam with a bolt or the like, the lighting device 1A can be fixed to the mounting surface. In the illustrated example, a hole for inserting a bolt is formed in the base 12a.

  The tip portion of the support portion 12b is fixed to the bridge portion 11c of the reinforcing member 11 by two bolts 13 and 14, respectively. An elongate hole 12c curved in an arc shape centering on the bolt 13 is formed at the tip of the support portion 12b. The bolt 14 is inserted through the elongated hole 12c.

  In FIG. 1, the surface of the base 12a of the arm 12 is perpendicular to the lamp axis AX. When the mounting surface such as a ceiling surface or a beam is horizontal, the base 12a is fixed to the mounting surface in the state shown in FIG. 1 so that the light source substrate 4 and the unit base 6 are illuminated horizontally. Apparatus 1A can be installed.

  When the bolts 13 and 14 are loosened, the arm 12 can rotate around the bolt 13 with respect to the reinforcing member 11 within a predetermined angle range. When the bolts 13 and 14 are tightened again after rotating the arm 12, the surface of the base 12a of the arm 12 can be in a state inclined with respect to the light source substrate 4 and the unit base 6. When a mounting surface such as a ceiling surface or a beam is inclined with respect to a horizontal plane, the light source substrate 4 and the unit base 6 are horizontal by setting the base 12a to be inclined in accordance with the mounting surface. The lighting device 1A can be installed as described above.

  FIG. 2 is an exploded perspective view of a part of the illumination device 1A shown in FIG. 1 as viewed obliquely from above. FIG. 2 shows a state in which the arm 12 is removed from the reinforcing member 11 and the reinforcing member 11 is removed from the unit body 3.

  As shown in FIG. 2, the unit main body 3 includes joints 6a and 7a. The joints 6a and 7a correspond to portions that face the other lighting unit 2 when the lighting unit 2 is connected to the other lighting unit 2. As will be described in a later embodiment, when the lighting units 2 are connected to each other, the joints 6a and 7a of one lighting unit 2 are joined to the joints 6a and 7a of the other lighting unit 2. Thereby, the lighting units 2 can be connected to each other.

  The joints 6 a and 7 a correspond to edges formed on the side surface of the unit main body 3. When the lighting units 2 are connected to each other, the joints 6a and 7a face the joints 6a and 7a of the other lighting unit 2.

  In the present embodiment, the unit base 6 has the joint 6a, and the unit cover 7 has the joint 7a. In the present embodiment, since both the unit base 6 and the unit cover 7 have the joints 6a, 7a, it is possible to increase the strength and rigidity of the connecting portion when the lighting units 2 are connected. It will be advantageous.

  The joining part 6a has a ventilation part 6b. The ventilation part 6b in the present embodiment corresponds to a notch obtained by cutting a part of an edge formed by the joint part 6a. As a modification, the ventilation part 6b may be constituted by a hole penetrating the joint part 6a.

  The joining part 7a has a ventilation part 7b. The ventilation portion 7b in the present embodiment corresponds to a notch obtained by cutting off a part of an edge formed by the joint 7a. As a modified example, the ventilation portion 7b may be configured by a hole penetrating the joint portion 7a.

  As will be described in a later embodiment, when a plurality of lighting units 2 are connected, the air passes through the ventilation portions 6b and 7b, and the internal space of the unit main body 3 where the radiation fins 5 are located, and the unit main body. 3 can be moved to and from the outside space. Thereby, a decrease in the heat radiation effect when the plurality of lighting units 2 are connected can be reliably suppressed, which is advantageous in lowering the temperature of the light emitting element 4a.

  The unit body 3 may be provided with only one of the ventilation part 6b and the ventilation part 7b. When the unit main body 3 has both the ventilation part 6b and the ventilation part 7b as in the present embodiment, a particularly excellent heat radiation effect can be obtained.

  The unit main body 3 in the present embodiment includes the joints 6a and 7a at two positions located on the opposite sides of each other via the central axis of the unit main body 3, that is, the lamp axis AX, and each of the joints 6a and 7a has Vent portions 6b and 7b are formed. Joints 6a, 7a and vents 6b, 7b are formed on four sides of the unit body 3 when viewed from the lamp axis direction, that is, two sides parallel to each other, among the four sides of the unit base 6 and the unit cover 7. I have.

  In the present embodiment, the first closing portion 11 a of the reinforcing member 11 is fixed to the joining portion 6 a of the unit base 6 by the plurality of screws 15. A plurality of screw holes 6c are formed in the joint 6a. A plurality of screw holes 11d are formed in the first closing portion 11a. By tightening the screw 15 inserted into the screw hole 11d and the screw hole 6c, the first closing portion 11a can be fixed to the joint 6a.

  In the present embodiment, the second closing portion 11 b of the reinforcing member 11 is fixed to the joining portion 7 a of the unit cover 7 by the plurality of screws 16. A plurality of screw holes 7c are formed in the joint 7a. A plurality of screw holes 11e are formed in the second closing part 11b. By tightening the screw 16 inserted into the screw hole 11e and the screw hole 7c, the second closing portion 11b can be fixed to the joint 7a.

  As described above, in the present embodiment, the reinforcing member 11 is fixed to the unit main body 3 by screwing, but the reinforcing member 11 is fixed to the unit main body 3 using other fixing methods such as caulking, bonding, welding, and brazing. May be fixed.

  A bolt hole 12d for passing the bolt 13 is formed in the support portion 12b of the arm 12. In the bridging portion 11c of the reinforcing member 11, a bolt hole 11g for passing the bolt 13 and a bolt hole 11h for passing the bolt 14 are formed.

  As shown in FIG. 1, when the reinforcing member 11 is attached to the unit main body 3, the first closing portion 11a closes the ventilation portion 6b, and the second closing portion 11b closes the ventilation portion 7b. In the present embodiment, the first closing portion 11a corresponds to a closing member that closes the ventilation portion 6b of the joint 6a that is not connected to another lighting unit 2, and the second closing portion 11b corresponds to the other lighting unit 2. It corresponds to a closing member that closes the ventilation part 7b of the joint part 7a that is not connected to the connection part. In the present embodiment, when the joints 6a, 7a are not connected to another lighting unit 2, the ventilation portions 6b, 7b of the joints 6a, 7a are connected to the first closing portion 11a of the reinforcing member 11 and Since it can be closed by the second closing portion 11b, it is advantageous in improving the design of the lighting device 1A. It is also advantageous in improving the strength and rigidity of the lighting device 1A.

  An opening 11f is formed in the bridging portion 11c of the reinforcing member 11. In the present embodiment, air can move between the internal space of the unit main body 3 where the radiation fins 5 are located and the external space of the unit main body 3 through the opening 11f. This is advantageous in improving the heat radiation efficiency, and is advantageous in lowering the temperature of the light emitting element 4a.

  FIG. 3 is a sectional plan view showing a part of the illumination device 1A shown in FIG. FIG. 3 corresponds to a plan view in which the position of the opening 11f is cut by a plane perpendicular to the lamp axis AX. FIG. 4 is a side view showing a part of the lighting device 1A shown in FIG. FIG. 4 corresponds to a side view as viewed from a position facing the bridging portion 11c of the reinforcing member 11.

  As shown in FIG. 3, when viewed from the lamp axis direction, some of the radiating fins 5 have a protruding portion 5 a that protrudes into the area of the ventilation portion 6 b of the unit base 6. As a result, the following effects can be obtained. When the joining portion 6a is connected to another lighting unit 2, the air passing through the ventilation portion 6b easily hits the protrusion 5a of the radiation fin 5. As a result, the heat radiation effect by the radiation fins 5 can be further improved.

  Although not shown, when viewed from the lamp axis direction, the protruding portion 5a protrudes into the area of the ventilation portion 7b of the unit cover 7. As a result, the following effects can be obtained. When the joining portion 7a is connected to another lighting unit 2, the air passing through the ventilation portion 7b easily hits the protrusion 5a of the radiation fin 5. As a result, the heat radiation effect by the radiation fins 5 can be further improved.

  The dimension L1 in FIGS. 3 and 4 corresponds to the maximum dimension of the opening 11f of the bridge portion 11c when viewed from a direction perpendicular to the surface of the unit base 6, that is, when viewed from the lamp axis direction. . The distance L2 in FIGS. 3 and 4 corresponds to the distance between the end of the radiation fin 5 facing the opening 11f and the end of the radiation fin 5 adjacent to the radiation fin 5. In the present embodiment, the dimension L1 is larger than the distance L2. As a result, the following effects can be obtained. Since the amount of air flowing between the radiation fins 5 through the openings 11f can be increased, the radiation effect of the radiation fins 5 can be further improved.

Embodiment 2 FIG.
Next, a second embodiment will be described with reference to FIG. 5, but the description will focus on differences from the first embodiment, and the description of the same or corresponding parts will be simplified or omitted. FIG. 5 is a perspective view of lighting device 1B according to Embodiment 2 as viewed obliquely from below. As shown in FIG. 5, the lighting device 1B of the present embodiment includes two lighting units 2 connected to each other. The two lighting units 2 have the same configuration as each other. According to the present embodiment, by connecting the plurality of lighting units 2, it is possible to configure the lighting device 1 </ b> B with a large luminous flux while sharing parts.

  Hereinafter, for convenience of explanation, one of the two lighting units 2 is referred to as a first lighting unit 2A, and the other is referred to as a second lighting unit 2B. At the connection between the first lighting unit 2A and the second lighting unit 2B, air can pass through the ventilation parts 6b, 7b. The air can flow between the internal space of the unit main body 3 where the radiation fins 5 are located and the external space below the unit base 6 through the ventilation part 6b. Further, the air can flow between the internal space of the unit main body 3 where the heat radiation fins 5 are located and the external space above the unit cover 7 through the ventilation part 7b. If the ventilation portions 6b and 7b are not provided, there is a possibility that the airflow may be less likely to hit the radiation fins 5 located at a position near the connecting portion between the first lighting unit 2A and the second lighting unit 2B. On the other hand, in the present embodiment, since air can pass through the ventilation portions 6b and 7b, the airflow can be reliably applied to the radiation fins 5. Therefore, a decrease in the heat radiation effect of the heat radiation fins 5 can be reliably suppressed, which is advantageous in lowering the temperature of the light emitting element 4a. As a result, the luminous efficiency of the light emitting element 4a is improved, and it is advantageous in extending the life of the light emitting element 4a. Further, the air flow path can be secured by the ventilation portions 6b and 7b without increasing the distance between the first lighting unit 2A and the second lighting unit 2B. Therefore, there is no need to increase the distance between the first lighting unit 2A and the second lighting unit 2B, which is advantageous in suppressing the overall size of the lighting device 1B.

  It is desirable that the joints 6a, 7a of the unit main body 3 of the first lighting unit 2A be in contact with the joints 6a, 7a of the unit main body 3 of the second lighting unit 2B. When the plurality of unit bodies 3 are connected, the joints 6a and 7a of the unit bodies 3 are brought into contact with each other, which is further advantageous in suppressing the size of the entire lighting device 1B. In addition, since the joints 6a and 7a of the unit main body 3 are in contact with each other, the strength and rigidity of the joint can be improved. According to the present embodiment, even when a plurality of unit bodies 3 are connected so that the joints 6a and 7a of the unit bodies 3 are in contact with each other, air can pass through the ventilation sections 6b and 7b. A reduction in the heat radiation effect of the heat radiation fins 5 can be reliably suppressed.

  At the connecting portion between the first lighting unit 2A and the second lighting unit 2B, the ventilation part 6b of the first lighting unit 2A and the ventilation part 6b of the second lighting unit 2B are adjacent to each other. The ventilation part 7b and the ventilation part 7b of the second lighting unit 2B are adjacent to each other. Thereby, the flow rate of the air passing through the ventilation sections 6b, 7b can be increased, so that the heat radiation performance can be further improved.

  In the present embodiment, the notch forming the ventilation part 6b of the first lighting unit 2A and the notch forming the ventilation part 6b of the second lighting unit 2B are combined to form one opening. As a result, air can smoothly pass through the opening, so that the heat radiation performance can be further improved. Similarly, the notch forming the ventilation part 7b of the first lighting unit 2A and the notch forming the ventilation part 7b of the second lighting unit 2B are combined to form one opening. As a result, air can smoothly pass through the opening, so that the heat radiation performance can be further improved.

  The lighting device 1B includes a frame-shaped connecting member 17. The unit main body 3 of the first lighting unit 2A and the unit main body 3 of the second lighting unit 2B are connected to each other via a connecting member 17. The connecting member 17 is fixed to both unit bodies 3 by a plurality of screws 15. The connection member 17 is arranged so as to surround the ventilation section 6b of the first lighting unit 2A and the ventilation section 6b of the second lighting unit 2B. Since air can pass through the inside of the connecting member 17, the connecting member 17 can be arranged without obstructing the airflow passing through the ventilation part 6b. The connecting member 17 is disposed so as to straddle the lower surface of the unit base 6 of the first lighting unit 2A and the lower surface of the unit base 6 of the second lighting unit 2B. Although not visible in FIG. 5, another connecting member 17 is disposed so as to straddle the upper surface of the unit cover 7 of the first lighting unit 2A and the upper surface of the unit cover 7 of the second lighting unit 2B. I have. The connecting member 17 is arranged so as to surround the ventilation part 7b of the first lighting unit 2A and the ventilation part 7b of the second lighting unit 2B. Thereby, the connecting member 17 can be arranged without obstructing the airflow passing through the ventilation part 7b.

  The reinforcing member 11 is attached to the unit body 3 of the first lighting unit 2A at a position opposite to the connecting member 17. The reinforcing member 11 is attached to the unit body 3 of the second lighting unit 2B at a position opposite to the connecting member 17. An arm 12 is attached so as to straddle these two reinforcing members 11.

  The unit main body 3 is provided with joints 6a, 7a at two locations located on opposite sides of the unit main body 3 with respect to the center axis, and the joints 6a, 7a are provided with ventilation portions 6b, 7b. I have. Thereby, when the plurality of unit bodies 3 are arranged so as to be connected in a line, the ventilation portions 6b and 7b can be arranged at each connecting portion where the unit bodies 3 are connected to each other.

  As described above, in the present embodiment, of the joints 6a and 7a of each lighting unit 2, the reinforcing members 11 are attached to the joints 6a and 7a that are not connected to the other lighting units 2. . This allows the ventilation portions 6b, 7b of the joints 6a, 7a to be closed by the reinforcing member 11, which is advantageous in improving the design of the lighting device 1B. It is also advantageous in improving the strength and rigidity of the lighting device 1B.

Embodiment 3 FIG.
Next, a third embodiment will be described with reference to FIG. 6, but the description will focus on differences from the above-described embodiment, and the description of the same or corresponding parts will be simplified or omitted. FIG. 6 is a perspective view of lighting device 1C according to Embodiment 3 as viewed obliquely from above.

  The lighting device 1C according to the present embodiment shown in FIG. 6 differs from the lighting device 1B according to the second embodiment in how the arm 12 is attached. The lighting device 1C further includes a reinforcing member 18 attached to a corner of the unit body 3 of the first lighting unit 2A and a corner of the unit body 3 of the second lighting unit 2B. The reinforcing members 18 are installed at two opposite sides with the connecting member 17 interposed therebetween. The arm 12 is attached so as to straddle these two reinforcing members 18.

  In the present embodiment, the unit main body 3 of the first lighting unit 2A and the unit main body 3 of the second lighting unit 2B are connected by the reinforcing member 18 in addition to the connecting member 17. For this reason, the strength and rigidity of the connecting portion between the unit main bodies 3 can be further improved.

  The same component as the above-described reinforcing member 11 may be used as the reinforcing member 18. By doing so, parts can be shared. Further, a component having a shape different from that of the reinforcing member 11 may be used as the reinforcing member 18.

Embodiment 4 FIG.
Next, a fourth embodiment will be described with reference to FIG. 7, but the description will focus on differences from the above-described embodiment, and description of the same or corresponding parts will be simplified or omitted. FIG. 7 is a perspective view of lighting device 1D according to Embodiment 4 as viewed obliquely from above.

  The lighting device 1D of the present embodiment shown in FIG. 7 differs from the lighting device 1C of the third embodiment in the shape of the unit main body 3. The unit main body 3 of the first lighting unit 2C and the second lighting unit 2D included in the lighting device 1D has a substantially circular shape when viewed from the lamp axis direction. That is, in the present embodiment, the shapes of the unit base 6 and the unit cover 7 when viewed from the lamp axis direction are substantially circular.

  The reinforcing member 18 in the present embodiment has a longer dimension in the direction perpendicular to the lamp axis direction than the reinforcing member 18 of the lighting device 1C in the third embodiment. Therefore, a component having a shape different from that of the reinforcing member 11 is used as the reinforcing member 18.

Embodiment 5 FIG.
Next, a fifth embodiment will be described with reference to FIG. 8, but the description will focus on differences from the first embodiment described above, and description of the same or corresponding parts will be simplified or omitted. FIG. 8 is a perspective view of lighting device 1E according to Embodiment 5 as viewed obliquely from above.

  The unit main body 3 of the lighting unit 2 included in the lighting device 1E according to the present embodiment shown in FIG. The vents 6b, 7b are formed at the joints 6a, 7a. When viewed from the lamp axis direction, the four joints 6a and 7a are arranged at equal angular intervals of 90 °. Joints 6a, 7a and vents 6b, 7b are formed on four sides of the unit body 3 when viewed from the lamp axis direction, that is, on four sides of the unit base 6 and the unit cover 7, respectively.

  The lighting device 1E further includes a reinforcing member 19 in addition to the reinforcing member 11 of the first embodiment. The reinforcing member 19 is attached to each of the two ventilation portions 6b and 7b to which the reinforcing member 11 is not attached. The reinforcing member 19 has a shape similar to that of the reinforcing member 11. The reinforcing member 19 includes a first closing portion 19a corresponding to a closing member closing the ventilation portion 6b, a second closing portion 19b corresponding to a closing member closing the ventilation portion 7b, a first closing portion 19a, and a second closing portion 19b. And a bridging portion 19c connecting the two. An opening 19d through which air can pass is formed in the bridge portion 19c. The reinforcing member 19 differs from the reinforcing member 11 in that the reinforcing member 19 does not have a bolt hole for attaching the arm 12. The opening 19d is larger than the opening 11f of the reinforcing member 11.

  According to the present embodiment, when the joints 6a, 7a are not connected to another lighting unit 2, the ventilation portions 6b, 7b of the joints 6a, 7a can be closed by the reinforcing members 11, 19. This is advantageous in improving the design of the lighting device 1E. It is also advantageous in improving the strength and rigidity of the lighting device 1E.

Embodiment 6 FIG.
Next, a sixth embodiment will be described with reference to FIG. 9, but the description will focus on differences from the above-described embodiment, and the description of the same or corresponding parts will be simplified or omitted. FIG. 9 is a perspective view of lighting device 1F according to Embodiment 6 as viewed obliquely from above.

  The lighting device 1F of the present embodiment shown in FIG. 9 includes a plurality of lighting units 2 similar to those of the fifth embodiment. In the present embodiment, four lighting units 2 are connected so as to be arranged in a matrix of 2 rows × 2 columns. In the present embodiment, when viewed from the lamp axis direction, the plurality of lighting units 2 can be connected so as to be arranged in a matrix of m rows × n columns. Here, m and n are integers of 2 or more. According to the present embodiment, by connecting the plurality of lighting units 2 in a matrix, it is possible to configure the lighting device 1F having a larger light flux while sharing parts.

  Hereinafter, for convenience of description, one direction in which the plurality of lighting units 2 are arranged is referred to as a “row direction”, and a direction orthogonal to the row direction and in which the plurality of lighting units 2 are arranged is referred to as a “column direction”.

  The lighting units 2 adjacent to each other in the row direction are connected via a connecting member 17 similar to that of the second embodiment. The lighting units 2 adjacent in the column direction are connected via a connecting member 17 similar to that of the second embodiment. Since the air flows through the ventilation portions 6b and 7b inside the connection members 17, the airflow can be reliably applied also to the radiation fins 5 near the connection portions between the lighting units 2. As a result, heat dissipation can be improved.

  As described in the fifth embodiment, the unit main body 3 of each lighting unit 2 is provided with the joints 6a, 7a and the ventilation parts 6b, 7b at four positions located in four directions with respect to the center axis of the unit main body 3. I have. Thus, the ventilation portions 6b, 7b can be formed between the lighting units 2 adjacent in the row direction, and the ventilation portions 6b, 7b can be formed between the lighting units 2 adjacent in the column direction. As a result, heat dissipation can be further improved.

  The lighting device 1F of the present embodiment includes the same reinforcing members 18 at the two locations as in the third embodiment, and the arms 12 are attached so as to straddle the two reinforcing members 18. Further, among the joints 6a and 7a of each lighting unit 2, a reinforcing member 19 is attached to the joints 6a and 7a that are not connected to the other lighting units 2. This allows the ventilation portions 6b, 7b of the joints 6a, 7a to be closed by the reinforcing member 19, which is advantageous in improving the design of the lighting device 1F. It is also advantageous in improving the strength and rigidity of the lighting device 1F.

1A, 1B, 1C, 1D, 1E, 1F lighting device, 2 lighting units, 2A first lighting unit, 2B second lighting unit, 2C first lighting unit, 2D second lighting unit, 3 unit body, 4 light source board, Reference Signs List 4a light emitting element, 5 radiating fin, 5a protrusion, 6 unit base, 6a, 7a joint, 6b, 7b vent, 6c screw hole, 7 unit cover, 7c screw hole, 8 support, 9 power supply device, 10 light transmission Cover, 11 reinforcing member, 11a first closing portion, 11b second closing portion, 11c bridge portion, 11d screw hole, 11e screw hole, 11f opening, 11g bolt hole, 11h bolt hole, 12 arm, 12a base, 12b support Part, 12c long hole, 12d bolt hole, 13, 14 bolt, 1 Screws, 16 screws, 17 connecting member, 18 reinforcing member, 19 a reinforcing member, 19a first closing portion, 19b second closing portion, 19c bridging portion, 19d opening

Claims (15)

A lighting device including a plurality of connectable lighting units,
The lighting unit comprises:
The unit body,
A light source substrate supported by the unit body,
A radiating fin supported by the unit body and dissipating heat generated by the light source board;
With
The unit body includes a joint that faces the other lighting unit when the lighting unit is connected to the other lighting unit,
The joint has a ventilation portion formed by a notch or an opening,
A lighting device, wherein when the plurality of lighting units are connected, air can move between the external space of the unit main body and the radiation fins through the ventilation portion. The unit body includes a unit base that supports the light source substrate,
The lighting device according to claim 1, wherein the ventilation portion is formed in the joint portion of the unit base. The unit body includes a unit base that supports the light source substrate, and a unit cover that is on the opposite side of the unit base with the radiation fins interposed therebetween,
The lighting device according to claim 1, wherein the ventilation portion is formed in the joint portion of the unit cover. The unit body includes a unit base that supports the light source substrate, and a unit cover that is on the opposite side of the unit base with the radiation fins interposed therebetween,
2. The lighting device according to claim 1, wherein the ventilation section is formed in each of the joint section of the unit base and the joint section of the unit cover. 3.   The lighting device according to any one of claims 1 to 4, further comprising a closing member that closes the ventilation portion of the joining portion that is not connected to another lighting unit. The unit base, comprising a reinforcing member that can be attached so as to bridge between the unit cover,
The reinforcing member includes a first closing portion that closes the ventilation portion of the joining portion of the unit base, a second closing portion that closes the ventilation portion of the joining portion of the unit cover, and the first closing portion. The lighting device according to claim 4, further comprising: a bridging portion connecting the second closing portion and the second closing portion. An opening is formed in the bridge portion,
The lighting device according to claim 6, wherein air is movable between the external space of the unit main body and the radiation fins through the opening of the bridge portion.   When viewed from a direction perpendicular to the surface of the unit base, the dimension of the opening of the bridge portion is such that an end of the heat radiation fin facing the opening and the heat radiation fin adjacent to the heat radiation fin The lighting device according to claim 7, wherein the distance is larger than a distance between the light source and the end of the lighting device. The first lighting unit and the second lighting unit connected to each other as the plurality of lighting units,
The lighting device according to any one of claims 1 to 8, wherein the ventilation part of the first lighting unit and the ventilation part of the second lighting unit are adjacent to each other.   The lighting device according to claim 9, wherein a notch forming the ventilation portion of the first lighting unit and a notch forming the ventilation portion of the second lighting unit are combined to form one opening. . The first lighting unit and the second lighting unit connected to each other as the plurality of lighting units,
The said 1st lighting unit and the said 2nd lighting unit are connected via the frame-shaped connection member arrange | positioned so that the circumference | surroundings of the said ventilation part may be given, The Claims any one of Claims 1-10. The lighting device according to the above.   The heat radiation fin has a portion that protrudes into a region of the ventilation section when viewed from a direction parallel to a central axis of the unit main body, according to any one of claims 1 to 11. Lighting equipment.   The lighting device according to any one of claims 1 to 12, wherein the unit main body includes the joints at two positions located on opposite sides of each other with respect to a center axis of the unit main body.   The lighting device according to any one of claims 1 to 12, wherein the unit main body includes the joining portions at four positions located in four directions with respect to a center axis of the unit main body.   The lighting device according to any one of claims 1 to 14, comprising a plurality of the lighting units arranged in a matrix.

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