JPWO2016080006A1 - Light source unit and lighting device - Google Patents

Abstract

A light source unit having improved light extraction efficiency is provided. The light source unit 30 includes a rectangular light emitting element substrate 12 on which a plurality of light emitting elements 11 having a rectangular shape are mounted in a matrix, and a rectangular light emitting element mounting region X on the light emitting element mounting surface of the light emitting element substrate 12. A reflective member 14 having a shape extending in the main emission direction of the plurality of light emitting elements 11, and a cover 20 having a light transmitting property provided so as to cover the reflective member 14 and the light emitting element mounting region X. And having. The power consumption per light emitting element 11 is 0.1 W or more and 0.7 W or less. The length L2 in the longitudinal direction of the light emitting element mounting region X is 82% or less of the length L1 in the longitudinal direction of the light emitting element substrate 12. The length L4 in the short direction of the light emitting element mounting region X is 52% or less of the length L3 in the short direction of the light emitting element substrate 12. [Selection] Figure 14

Description

  The present disclosure relates to a light source unit and a lighting device.

  2. Description of the Related Art Conventionally, there is known a lighting device for a high ceiling that is attached to a high ceiling such as a multipurpose hall or a gymnasium and irradiates a lower floor surface or the like (for example, Patent Document 1).

JP 2013-004168 A

By the way, since the lighting device for high ceiling is installed on the high ceiling, there is a demand for improving the light extraction efficiency in order to ensure the illuminance of the irradiated surface.
The objective of this indication is providing the light source unit and the illuminating device which improved the extraction efficiency of light.

In order to solve the above problems, a light source unit according to an aspect of the present disclosure includes a plurality of light emitting elements having a rectangular shape, a rectangular light emitting element substrate on which the plurality of light emitting elements are mounted in a matrix, On the surface of the light emitting element substrate on which the light emitting elements are mounted and on the surface opposite to the surface on which the light emitting elements are mounted, and on the surface of the light emitting element substrate on which the plurality of light emitting elements are mounted, the plurality of light emitting elements are mounted. A rectangular light emitting element mounting region, and a reflective member having a shape extending in a main emission direction of the plurality of light emitting elements, and the reflective member and the light emitting element mounting region. A cover having translucency,
The power consumption per said light emitting element is 0.1 W or more and 0.7 W or less,
The length in the longitudinal direction of the light emitting element mounting region is 82% or less of the length in the longitudinal direction of the light emitting element substrate, and the length in the short direction of the light emitting element mounting region is short of the light emitting element substrate. It is 52% or less of the length in the hand direction.

  According to one aspect of the present disclosure, out of light emitted from the light emitting element, light emitted from the light emitting element in an oblique direction can be effectively reflected by the reflecting member, and light can be efficiently emitted to the main emission direction side of the light emitting element. Can lead. Therefore, it is possible to improve the light extraction efficiency.

It is an external appearance perspective view which shows the whole structure which looked at the illuminating device 1 which concerns on 1st Embodiment of this indication from upper direction. It is the perspective view seen from the downward direction of the illuminating device 1. FIG. FIG. 6 is a front view of six views illustrating an appearance of the lighting device 1 according to the first embodiment of the present disclosure. It is a left view of the illuminating device 1. FIG. It is a right view of the illuminating device 1. FIG. 1 is a plan view of a lighting device 1. FIG. 2 is a bottom view of the lighting device 1. FIG. It is a disassembled perspective view which shows the structure of the illuminating device 1 which concerns on 1st Embodiment of this indication. It is a perspective view which shows the external appearance of the light source unit with which the illuminating device 1 which concerns on 1st Embodiment of this indication is equipped. It is sectional drawing which shows the cross section of the illuminating device 1 which concerns on 1st Embodiment of this indication. It is a perspective view which shows the structure of the light emitting element substrate of the illuminating device 1 which concerns on 1st Embodiment of this indication. It is a disassembled perspective view which shows the structure of the light source unit of the illuminating device 1 which concerns on 1st Embodiment of this indication. FIG. 3 is a perspective view showing the appearance of a light source unit support member 17, a terminal block cover 18, and a mounting member 19 of the lighting device 1 according to the first embodiment of the present disclosure. It is a perspective view explaining the composition of power supply part 16 of lighting installation 1 concerning a 1st embodiment of this indication. FIG. 6 is a bottom view showing a state in which a part of the lower surface side of a power supply box 161 that is an exterior body of the power supply unit 16 is removed from the lighting apparatus 1 according to the first embodiment of the present disclosure. It is a perspective view from the lower surface which shows the state which removed a part of the lower surface side of the power supply box 161 which is an exterior body of the power supply part 16 from the illuminating device 1 which concerns on 1st Embodiment of this indication. It is sectional drawing explaining the structure of the power supply part 16 of the illuminating device 1 which concerns on 1st Embodiment of this indication. It is a perspective view which shows the modification of the illuminating device 1 which concerns on 1st Embodiment of this indication. It is an external appearance perspective view which shows the whole structure of the illuminating device 100 which concerns on other embodiment of this indication. It is a top view which shows a light emitting element substrate. It is a top view which shows a light emitting element. It is a top view which shows arrangement | positioning of a several light emitting element.

In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of embodiments of the present disclosure. It will be apparent, however, that one or more embodiments may be practiced without such specific details. In other instances, well-known structures and devices are shown in schematic form in order to simplify the drawing.
Hereinafter, the lighting device according to the first embodiment of the present disclosure will be described. In the following embodiments, when the lighting device is attached to the ceiling, the direction facing the ceiling may be described as the upward direction of the lighting device, and the floor direction may be described as the downward direction of the lighting device.

1. 1. First Embodiment (1-1) Overall Configuration of Illuminating Device An illuminating device according to a first embodiment of the present disclosure will be described with reference to FIGS. 1 to 11 below.
1A and 1B are perspective views illustrating an external appearance of a lighting apparatus according to a first embodiment of the present disclosure. FIG. 1A is a perspective view seen from above the illumination device 1. FIG. 1B is a perspective view of the lighting device 1 as viewed from below.
2A to 2E are six views showing the appearance of the lighting device. 2A is a front view of the lighting device 1, FIG. 2B is a left side view of the lighting device 1, FIG. 2C is a right side view of the lighting device 1, FIG. 2D is a plan view of the lighting device 1, and FIG. FIG. The back view is omitted.
FIG. 3 is an exploded perspective view showing the configuration of the illumination device.
FIG. 4 is a perspective view illustrating an appearance of a light source unit provided in the lighting device.

As shown in FIGS. 1A and 1B, FIGS. 2A to 2E, and FIG. 3, the illuminating device 1 according to the first embodiment of the present disclosure includes a plurality of light emitting elements (not shown, details will be described later). (In the embodiment, two) light source units 30, a power supply unit 16 that is provided between the two light source units 30 and supplies power to the light emitting elements by the power supply cable 168, and 2 so that the light emitting elements are exposed. The light source unit support member 17 that supports the individual light source units 30, the light source unit support member 17 that is fixed along the power source unit 16, and that is attached to a mounting surface such as a ceiling, and the power source unit 16. The terminal block cover 18 covering the terminal block 162 (see FIG. 2B) exposed to the outside from a part of the light source unit support member 17, the cover 20 covering the light emitting element, and the cover 20 exposed from the opening 211. It has a cover frame 21 that covers the light source unit 30 and the power supply unit 16 from the lower side. The light source unit 30 includes a heat radiator 15.

The light source unit 30 is fixed to the light source unit support member 17 with screws S17. The light source unit 30 is fixed to the cover frame 21 with screws S21. The attachment member 19 is fixed to the light source unit support member 17 by screws S19 and nuts N19.
3 and 4, the light source unit 30 includes a plurality of light emitting elements 11, a light emitting element substrate 12 on which the plurality of light emitting elements 11 are mounted, and light emitted from the light emitting elements 11 in the light irradiation direction. The reflective member 14 to reflect, the heat radiator 15 which dissipates the heat of the light emitting element 11, and the cover 20 which covers the light emitting element 11 are provided. The light emitting element substrate 12, the reflecting member 14, and the cover 20 are attached to the heat radiator 15 by screws S12. As shown in FIG. 4, the reflecting member 14 is attached to the heat radiator 15 in a state of being superimposed on the inner side of the cover 20 made of a light-transmitting material. The cover 20 is attached to the heat radiating body 15 so as to cover the reflecting member 14. In the present embodiment, the plurality of light emitting elements 11 mounted on the light emitting element substrate 12 may be collectively referred to as a light source 13.

As illustrated in FIG. 3, in the lighting device 1 according to the first embodiment of the present disclosure, the power supply unit 16 is disposed between the two light source units 30. Here, “between the light source units 30” refers to a state in which the power supply unit 16 is disposed between the two light source units 30 when the illumination device 1 is viewed in plan view from above or below. The power supply unit 16 is sandwiched between the light source units in the substrate surface direction of the light emitting element substrate 12.
Since the power supply unit 16 is disposed between the two light source units 30, when the heat transferred from the light emitting element 11 is radiated by the heat radiating body 15, the heat radiating of the heat radiating body 15 is not hindered. . In addition, since the power supply unit 16 is not disposed above the radiator 15, the power supply unit 16 is not heated by the heat radiated from the radiator 15.

In addition, the protrusion part 161b of the power supply part 16 shown in FIG. 3 is mentioned later.
The lighting device 1 according to the first embodiment of the present disclosure can be used as a lighting device that is attached to a high ceiling such as a multipurpose hall, a gymnasium, or a factory to irradiate a floor surface, a wall surface, or the like. The lighting device 1 is attached to the ceiling by an attachment jig (not shown) inserted into the hole 191a (see FIG. 1A) of the attachment member 19. Further, the terminal block 162 covered with the terminal block cover 18 shown in FIG. 3 includes a power cable led out from the ceiling through a hole or the like, or a power cable routed along the ceiling (both not shown). ) Is connected. Thereby, the electric power from a commercial power source is supplied to the lighting device 1.

FIG. 5 is a cross-sectional view showing an AA cross section of the lighting device 1 of FIG. 2D.
As illustrated in FIG. 5, in the lighting device 1 according to the first embodiment of the present disclosure, the radiator 15 is disposed with a space between the power supply unit 16. For example, in FIG. 5, the heat dissipating body 15 is disposed by providing a space between the side surface of the heat dissipating body 15 on the side of the power supply unit 16 and the side surface of the power supply unit 16. The heat conducted to the body 15 is not easily transmitted to the power supply unit 16. In addition, the heat generated by the power supply unit 16 is not easily transmitted to the radiator 15.
For this reason, the illuminating device 1 can efficiently radiate only the heat of the light emitting element 11 that generates high heat.

The radiator 15 is arranged so that the side surface of the radiator 15 on the light source unit support member 17 side is in contact with the light source unit support member 17.
Since the light source unit support member 17 has a large surface area and is exposed to the outside of the lighting device 1, it has high heat dissipation. For this reason, when the heat radiator 15 and the light source unit support member 17 are in contact with each other, the heat of the heat radiator 15 is diffused to the light source unit support member 17, so that the entire light source unit support member 17 can dissipate heat.
For this reason, since the illuminating device 1 can radiate | emit the heat | fever which generate | occur | produced in the light emitting element 11 in which a high heat | fever generate | occur | produces with not only the heat radiator 15 but the light source unit support member 17, it can radiate | emit more efficiently.

(1-2) Configuration of Each Part of Lighting Device Hereinafter, each part of the lighting device 1 will be described in detail.
(Light emitting element substrate)
FIG. 6 is a perspective view showing a configuration of the light emitting element substrate 12. In FIG. 6, for ease of explanation, the light emitting element substrate 12 in a state where the plus side cable 168 a and the minus side cable 168 b of the power supply cable 168 that connects the power supply unit 16 and the light emitting element substrate 12 are connected is illustrated. ing.

  As shown in FIG. 6, the light emitting element substrate 12 has a rectangular thin plate shape. The light emitting element substrate 12 has a light emitting element mounting surface 12a on which a plurality of light emitting elements 11 (light sources 13) made of, for example, LEDs (light emitting diodes) are mounted. In FIG. 6, only one light emitting element is indicated as the light emitting element 11, but a plurality of light emitting elements 11 are mounted on the light emitting element substrate 12.

The light emitting elements 11 are mounted in a matrix at the center of the light emitting element mounting surface 12a. FIG. 6 shows an example in which the light emitting elements 11 are mounted in 5 rows and 30 columns.
The light emitting element substrate 12 has a radiator facing surface 12b on the back surface of the light emitting element mounting surface 12a.
The light emitting element substrate 12 has a hole (not shown) penetrating from the light emitting element mounting surface 12a to the radiator facing surface 12b. A cable protection bush 121 in which a hole 121a is formed is fitted in this hole. A power supply cable 168 connected to the power supply unit 16 is inserted into the hole 121 a of the cable protection bush 121. The cable protection bush 121 is made of rubber, for example. Damage to the coating material of the power supply cable 168 can be prevented by the cable protection bush 121.

  The light emitting element substrate 12 has a connector 122 for connecting a power supply cable 168 connected to the power supply unit 16 to the light emitting element mounting surface 12a. The connector 122 has a plus side terminal 122a and a minus side terminal 122b. A plus side cable 168 a of the power supply cable 168 is connected to the plus side terminal 122 a of the connector 122. The minus side cable 168 b of the power supply cable 168 is connected to the minus side terminal 122 b of the connector 122.

  In the light emitting element substrate 12, all of the plurality of light emitting elements 11 provided on the light emitting element substrate 12 are connected between the plus side terminal 122a and the minus side terminal 122b of the connector 122. For example, the light emitting elements 11 in each row are connected in series, and the light emitting elements 11 in each row connected in series are connected in parallel between the plus side terminal 122a and the minus side terminal 122b. For this reason, the plus side cable 168a and the minus side cable 168b of the power supply cable 168 are connected to the plus side terminal 122a and the minus side terminal 122b of the connector 122, respectively, thereby supplying power to all of the light emitting elements 11. be able to.

The light emitting element substrate 12 has screw holes 123a, 123b, 123c, 123d, 123e, and 123f (may be described as screw holes 123a to 123f).
The light emitting element substrate 12 includes a plurality of screws S12 (see FIG. 4, one of the screws S12 not shown) inserted into each of the screw holes 123a to 123f from the light emitting element mounting surface 12a side. Fixed to.
In the lighting device 1 according to the first embodiment of the present disclosure, a plurality of light emitting elements 11 are provided on the light emitting element substrate 12, thereby reducing the light emission amount per light emitting element 11, and the desired light emitting amount as a whole. Is obtained. Thereby, since the amount of current supplied to one light emitting element 11 can be reduced, the life of the plurality of light emitting elements 11 can be extended.

The light emitting element substrate 12 has a laminated structure. The light-emitting element substrate 12 is supplied to, for example, an aluminum base material formed of aluminum as a first layer, an insulating layer as a second layer, and an electronic component such as a light-emitting element 11 and a resistance element (not shown) as a third layer. It has a laminated structure of a copper pattern layer in which a copper wire serving as a current path is patterned and a fourth layer is a resist layer that becomes the light emitting element mounting surface 12a. The aluminum base material is formed to a thickness of 2 mm, for example. The insulating layer is formed with a thickness of, for example, 95 μm or 120 μm. A white oil-based resist material is used for the resist layer. Thereby, the reflectance at the light emitting element mounting surface 12a is improved, and the utilization efficiency of light emitted from the plurality of light emitting elements 11 is improved.
The lighting device 1 is attached to a ceiling or the like of a gymnasium or a factory, and is separated from a place irradiated by the lighting device 1 by a predetermined distance. For this reason, when the illuminating device 1 is viewed from the place where the light is irradiated, the illuminating device 1 looks as if the entire light source 13 emits light.

  FIG. 14 is a plan view of the light emitting element substrate 12 as viewed from the main emission direction of the light from the light emitting element 11. The light emitting element 11 has a rectangular shape, and the longitudinal direction of the light emitting element 11 is along the short direction of the light emitting element substrate 12 having a rectangular shape. Further, the lateral direction of the light emitting element 11 is along the longitudinal direction of the light emitting element substrate 12. The plurality of light emitting elements 11 are mounted in a matrix in 5 rows and 30 columns on the light emitting element substrate 12.

  FIG. 14 is a plan view showing a light emitting element mounting region X in which a plurality of light emitting elements 11 are mounted and a region Y other than the light emitting element mounting region X in the light emitting element substrate 12. In the region Y, the reflecting member 14 is provided. The reflection member 14 extends outward with respect to the main emission direction of the light emitting element 11. In the present embodiment, all the light emitting elements 11 mounted on the light emitting element substrate 12 have the same shape, but the present invention is not limited to this. Some of the light emitting elements 11 among the plurality of light emitting elements 11 may have different shapes.

  A light-transmitting cover 20 is provided on the reflecting member 14 so as to cover the reflecting member 14 and the light emitting element mounting region X. The cover may be formed transparent, or the cover may be light diffusive although not transparent. The light diffusibility is obtained by adding a diffusing agent to the resin constituting the cover, for example, making it milky white. Light diffusibility can also be obtained by subjecting the resin constituting the cover to a surface treatment. When the cover is transparent, the illuminance directly below the light source unit increases. When the cover is not transparent but has light diffusibility, the illuminance just below is slightly reduced as compared with the case where the cover is transparent, but the light sufficiently spreads to a region away from directly below the light source unit.

  The length L1 in the longitudinal direction of the light emitting element substrate 12 is 240 mm, and the length L3 in the short direction of the light emitting element substrate 12 is 75 mm. Further, the length L2 in the longitudinal direction of the light emitting element mounting region X is 192 mm, and the length L4 in the short direction of the light emitting element mounting region X is 38 mm. The margin in the longitudinal direction of the light emitting element mounting region X in the light emitting element substrate 12 is equal on both sides, and both are 24 mm. The margin in the short direction of the light emitting element mounting region X in the light emitting element substrate 12 is equal on both sides, and both are 18.5 mm.

  The length L2 in the longitudinal direction of the light emitting element mounting region X is 80% of the length L1 in the longitudinal direction of the light emitting element substrate 12 (L2 / L1 × 100 = 80.0%). The length L4 in the short direction of the light emitting element mounting region X is about 50.7% of the length L3 in the short direction of the light emitting element substrate 12 (L4 / L3 × 100≈50.7%).

  Here, the length L2 in the longitudinal direction of the light emitting element mounting region X is preferably 82% or less of the length L1 in the longitudinal direction of the light emitting element substrate 12. The length L4 in the short direction of the light emitting element mounting region X is preferably 52% or less of the length L3 in the short direction of the light emitting element substrate 12.

  By spreading the light emitting elements 11 within such a range, out of the light emitted from the light emitting elements 11, the light emitted from the light emitting elements 11 in an oblique direction can be effectively reflected by the reflecting member 14, and the light emitting elements 11 The light can be efficiently guided to the main emission direction 11 (the direction perpendicular to the paper surface of FIG. 14 and facing forward). That is, even if the lighting device having the light source unit 30 is installed on a high ceiling (for example, a ceiling of about 5 m from the floor surface), it is possible to increase the light extraction efficiency as compared with the case where it is out of the above range. Become.

  Temporarily, the length L2 in the longitudinal direction of the light emitting element mounting region X is greater than 82% of the length L1 in the longitudinal direction of the light emitting element substrate 12, or the length L4 in the short direction of the light emitting element mounting region X is If the light emitting element substrate 12 is larger than 52% of the length L3 in the short direction, the following adverse effects occur. That is, the adverse effect is that light emitted from the light emitting element 11 in an oblique direction cannot be effectively reflected by the reflecting member, and the main emission direction of the light emitting element 11 (direction perpendicular to the plane of FIG. 14 and facing forward). The light cannot be efficiently guided to the side.

  Next, the light emitting elements 11 arranged in the light emitting element mounting region X will be described. The power consumption per light emitting element 11 is preferably 0.1 W or more and 0.7 W or less. More preferably, it is 0.15 W or more and 0.5 W or less. In the first embodiment, the power consumption per light emitting element 11 is 0.2 W. A light-emitting element whose power consumption is 0.1 W or more and 0.7 W or less corresponds to a so-called middle chip (or middle power) LED chip. The forward current of the light emitting element 11 of the first embodiment is about 65 mA when VF (forward voltage) is 3V. If the power consumption is less than 0.1 W, the amount of current flowing decreases, and sufficient brightness cannot be obtained. Conversely, when the power consumption is greater than 0.7 W, the LED chip is in the category of so-called high power, and the power consumption increases. And by making the power consumption of the light emitting element arranged in the light emitting element mounting region X 0.1W or more and 0.7W or less, the power consumption per light emitting element 11 is smaller than 0.1W, or Compared with the case where it is larger than 0.7 W, it is possible to ensure both the light extraction efficiency and the suppression of power consumption.

  FIG. 15A shows one size of the light emitting element 11. The length of the light emitting element 11 in the longitudinal direction is 5.6 mm, and the length of the light emitting element 11 in the short direction is 3 mm.

  FIG. 15B shows an arrangement of four light emitting elements 11 adjacent to each other. The distance in the longitudinal direction between adjacent light emitting elements 11 is 1.4 mm, and the distance in the short direction between adjacent light emitting elements 11 is 3.5 mm. These intervals are all the same in the light emitting element mounting region X. Therefore, the distance between the adjacent light emitting elements 11 in the short direction is longer than the distance between the adjacent light emitting elements 11 in the longitudinal direction. The pitch in the longitudinal direction between the centers 11a of the light emitting elements 11 is 7.0 mm, and the pitch in the short direction between the centers 11a of the light emitting elements 11 is 6.5 mm. Therefore, the pitch in the longitudinal direction between the centers 11 a of the light emitting elements 11 is longer than the pitch in the short direction between the centers 11 a of the light emitting elements 11.

  By arranging the light emitting elements 11 as described above, more uniform surface light emission without unevenness can be obtained.

(Heat radiator)
FIG. 7 is an exploded perspective view showing the configuration of the light source unit 30 in which the light emitting element substrate 12, the reflecting member 14, and a cover 20 (details will be described later) covering the light emitting element 11 are fixed to the radiator 15. FIG. 7 shows an example of the light source unit 30 using, for example, a colorless and transparent cover 20. The cover 20 is attached to the heat radiating body 15 so as to overlap the reflecting member 14.
In the following description, along the front view of the lighting device 1 shown in FIG. 2A, the surface where the end faces of the plurality of heat radiation fins 152 are exposed is the front surface of the heat radiator 15, and the power source unit 16 and the light source unit support member 17 Let the opposing surface be the side surface of the radiator 15.

  As shown in FIG. 7, the radiator 15 includes a light source support portion 151 that supports the light source 13 on one surface, and a plurality of heat radiation fins 152 provided on the other surface of the light source support portion 151. The heat radiating fins 152 are formed in parallel with the side surface of the heat radiating body 15, and a plurality of heat radiating fins 152 are formed in parallel between both side surfaces of the heat radiating body 15. The light source support 151 and the plurality of heat radiation fins 152 are integrally formed. The light source support portion 151 has, for example, a rectangular shape, and the light emitting element substrate 12 on which the light source 13 is mounted on one surface (light source support surface 151 a) facing the light emitting element substrate 12 on which the light source 13 is mounted. To support. The radiator 15 is provided with a plurality of radiation fins 152 on the back surface (radiation fin forming surface 151b) of the light source support surface 151a. The plurality of heat radiation fins 152 are arranged at equal intervals. The heat generated in the light emitting element 11 is transmitted to the plurality of heat radiation fins 152 through the light emitting element substrate 12 and the light source support portion 151 of the heat radiator 15 and is radiated from the plurality of heat radiation fins 152.

  The radiator 15 has a thick portion 153 on at least one side surface facing the light source unit support member 17 and the cover frame 21. The thick portion 153 may be described as screw holes 156a, 156b, 156c, and 156d (156a to 156d) when the light source unit support member 17 is fixed to the radiator 15 with screws S17 (see FIGS. 1A and 1B). 156c and 156d (not shown). The screw holes 156a to 156d are formed at positions overlapping with holes 176 of the light source unit support member 17 (details will be described later with reference to FIG. 8).

  The thick portion 153 may be described as screw holes 157a, 157b, 157c, and 157d (157a to 157d) when the cover frame 21 is fixed to the radiator 15 by screws S21 (see FIGS. 1A and 1B). And 157d (not shown). The screw holes 157a to 157d are formed at positions overlapping with holes (not shown) into which the screws S21 provided in the cover frame 21 are inserted.

The heat radiator 15 includes guide grooves 154 on each of a surface facing the light source unit support member 17 and a surface facing the power supply unit 16 (that is, both side surfaces of the heat radiator 15). As shown in FIG. 7, the guide groove 154 is provided in the thick portion 153 on the side surface of the radiator 15. The guide groove 154 is formed so as to be engageable with protrusions (details will be described later) provided in the light source unit support member 17 and the power supply unit 16, respectively. When the lighting device 1 is assembled, the guide groove 154 of the heat dissipating body 15 is engaged with the protrusions provided on the light source unit support member 17 and the power supply unit 16, respectively.

  The guide groove 154 is formed so as to reach at least the front surface or the back surface of the radiator 15. In the heat radiator 15 shown in FIG. 7, the guide groove 154 is formed so as to reach both the front surface and the back surface of the heat radiator 15. That is, the guide groove 154 is formed so as to reach from the front to the back (or vice versa). Further, the guide groove 154 is formed continuously. That is, the guide groove 154 is continuously formed on one side surface of the radiator 15.

  As shown in FIGS. 4 and 7, among the plurality of radiating fins 152 provided on the heat radiating body 15, the light emitting element mounting region X in which the light emitting element 11 of the light emitting element substrate 12 is mounted and the light source support portion 151 are interposed. The opposing radiating fins 152a are formed longer than the remaining radiating fins 152b. Here, the “light emitting element mounting region” of the light emitting element substrate 12 is an area on the light emitting element substrate 12 on which the plurality of light emitting elements 11 are mounted and an area on the light emitting element substrate 12 sandwiched between the light emitting elements 11. Is a region on the light emitting element mounting surface 12a. For example, in the light emitting element substrate 12 shown in FIGS. 6 and 7, a plurality of light emitting elements 11 (light sources 13) are mounted in a rectangular region. The “light emitting element mounting area X” is a rectangular area in which the plurality of light emitting elements 11 are mounted. The “light emitting element mounting region X” in the light emitting element substrate 12 shown in FIGS. 6 and 7 is located on the short side of the first row of light emitting elements 11 formed at a position closest to one short side of the light emitting element substrate 12. The edge, the edge on the short side of the 30th row of light emitting elements 11 formed at the position closest to the other short side of the light emitting element substrate 12, and the position closest to one long side of the light emitting element substrate 12 The edge on the long side of the light emitting elements 11 in the first row formed on the edge and the edge on the short side of the light emitting elements 11 in the fifth row formed on the position closest to the other long side of the light emitting element substrate 12. This is an area surrounded by a part.

  The radiator 15 shown in FIG. 6 is provided with eight radiating fins 152. Of the eight radiating fins 152, four radiating fins 152 a provided on the inner side face the light emitting element mounting region X of the light emitting element mounting surface 12 a via the light emitting element substrate 12 and the light source support portion 151. . The four radiating fins 152a provided on the inner side are formed longer than the four radiating fins 152b provided on the outer side of the radiating fins 152a and not facing the light emitting element mounting region. The heat generated in the light emitting element 11 is more easily transferred to the heat radiation fins 152a on the light emitting element mounting area X than the heat radiation fins 152b around the light emitting element mounting area X. Since the radiation fin 152a is longer than the radiation fin 152b and has a larger surface area, the heat of the light emitting element 11 is efficiently radiated.

  Although the details will be described later with reference to FIG. 8, the light source unit support member 17 includes a slope portion 171 b formed in accordance with the shape of the radiator 15 and a vent 174. For this reason, the heat radiated from the radiating fins 152a provided on the inner side of the radiating fins 152 is easily discharged outside the lighting device 1 without being blocked by the radiating fins 152b provided on the outer side. Further, the heat radiating fins 152 a are easily in contact with air entering from the vent 174 of the light source unit support member 17. For this reason, the heat dissipation of the radiation fin 152a can be improved.

  As shown in FIG. 7, the heat radiator 15 has a hole 158 that penetrates the light source support 151. The hole 158 is provided at a position facing the hole 121 a of the cable protection bush 121 provided in the light emitting element substrate 12. A power supply cable 168 connected to the power supply unit 16 is inserted into the hole 158. As a result, the power supply cable 168 led out from the power supply unit 16 is drawn from the radiation fin forming surface 151b side to the light source support surface 151a side and connected to the connector 122 of the light emitting element substrate 12.

  The radiator 15 has screw holes 155a, 155b, 155c, 155d, 155e, and 155f (155a to 155f) that are formed on the light source support surface 151a so as to overlap with the screw holes 123a to 123f of the light emitting element substrate 12. There is). The light emitting element substrate 12, the reflecting member 14, and the cover 20 are fixed to the radiator 15 by a plurality of screws 124 a to 124 f (see FIG. 4, the screws 124 f are not shown).

  The radiator 15 is formed by die casting using aluminum, for example. Thereby, the heat radiator 15 has high rigidity, light weight, and high heat dissipation. The shape and arrangement position of the radiating fins 152 are not only the positional relationship with the light emitting element 11 when the light emitting element substrate 12 is attached to the heat radiating body, but also the detachability of the die used for die casting and the air permeability during heat dissipation. And has been determined in consideration of.

(Reflective member)
As shown in FIG. 7, the reflecting member 14 surrounds the light source 13 mounted on the light emitting element substrate 12 and is disposed so that the light source 13 on the light emitting element substrate 12 is exposed. The reflection member 14 improves the irradiation efficiency of the lighting device 1 by reflecting the light irradiated from the light emitting element 11 in the light irradiation direction.

  As shown in FIG. 7, the reflecting member 14 is a slope that spreads in the light irradiation direction of the light emitting element 11 from the outer periphery of a rectangular area (light emitting element mounting area) on which the plurality of light emitting elements 11 (light sources 13) are mounted. Part 141 (141a, 141b, 141c and 141d). The slope 141a is provided along one long side of the light emitting element mounting region. The slope 141b is adjacent to the slope 141a and is provided along one short side of the light emitting element mounting region. The slope portion 141c faces the slope portion 141a and is adjacent to the slope portion 141b, and is provided along the other long side of the light emitting element mounting region. The slope portion 141d faces the slope portion 141b, is adjacent to the slope portions 141a and 141c, and is provided along the other short side of the light emitting element mounting region. The reflecting member 14 has a notch at a position overlapping the screw holes 123 a to 123 f of the light emitting element substrate 12.

  Further, when the reflecting member 14 is attached to the heat radiating body 15 together with the light emitting element substrate 12, a frame-like side wall portion 142 (a part of the side wall portion is not shown) that contacts the light emitting element substrate 12 substantially perpendicularly. )have. Further, the reflecting member 14 has a flat surface portion 143 that connects the slope portion 141 and the side wall portion 142. The slope portion 141, the side wall portion 142, and the plane portion 143 are integrally formed.

  The reflection member 14 is formed, for example, by injection molding a highly reflective resin material. The highly reflective resin material can be obtained, for example, by mixing a resin material with a reflective agent. Further, the reflecting member 14 is formed of a non-translucent material that does not transmit light irradiated by the light emitting element 11. The reflecting member 14 does not pass the light irradiated by the light emitting element 11, thereby reflecting the light irradiated by the light emitting element 11 in the light irradiation direction (floor direction) without waste, and improving the irradiation efficiency of the lighting device 1. it can.

(cover)
The cover 20 is a translucent cover that covers the light emitting element 11 and transmits light emitted from the light emitting element 11. The cover 20 has a function of protecting the light emitting element 11.
As shown in FIGS. 4 and 7, the cover 20 is formed in a shape overlapping the reflective member 14 so as to cover the reflective member 14 from the outside. The cover 20 has a side wall portion 202 formed in a shape along the outer shape of the side wall portion 142 of the reflecting member 14. Further, the cover 20 is formed in a shape that forms a space between the light source 13 mounted on the light emitting element substrate 12 and the inclined surface portion 141 of the reflecting member 14 along the outer shape of the flat surface portion 143 of the reflecting member 14. The light transmission part 203 is provided. The light transmitting portion 203 transmits light from the light emitting element 11 in a region other than the region in contact with the flat portion 143 of the reflecting member 14.

  The cover 20 includes screw holes 201a, 201b, 201c, 201d, 201e and 201f (201a to 201f which may be described as 201a to 201f) formed at positions overlapping the screw holes 123a to 123f provided in the light emitting element substrate 12. 201e and 201f are not shown). The cover 20 is fixed to the heat radiating body 15 in a state where the light transmitting portion 203 and the flat portion 143 of the reflecting member 14 are in contact with each other while covering the reflecting member 14 from the outside. The cover 20 is attached to the radiator 15 by a plurality of screws 124a to 124f (screws 124f are not shown) inserted into the screw holes 201a to 201f and the screw holes 123a to 123f of the light emitting element substrate 12 from the floor direction side. Fixed. The screws 124 a to 124 f are fixed to screw holes 155 a to 155 f provided in the heat radiator 15. The screw holes 155a to 155f of the radiator 15 are provided at positions overlapping the screw holes 201a to 201f.

  Further, the cover 20 may be provided with an internal pressure adjusting unit (not shown). The internal pressure adjusting unit is a film-like member formed so as to close the opening formed in the light transmitting unit 203. The internal pressure adjusting part has high air permeability. The internal pressure adjusting unit is, for example, a porous film. The internal pressure adjusting unit prevents the pressure in the space surrounded by the light emitting element substrate 12, the light transmitting unit 203, and the reflecting member 14 from changing depending on the usage environment of the lighting device 1. For example, when the temperature of the environment in which the lighting device 1 is used becomes high and the pressure in the space surrounded by the light transmitting portion 203 and the light emitting element substrate 12 increases, the air in the space is released to the outside via the internal pressure adjusting portion. . Thereby, the pressure of the space is adjusted to a steady state.

The cover 20 is formed by, for example, injection molding using a resin material. As the resin material, a material that has high resistance to heat of the light-emitting element 11, has a strength that can withstand an impact from the outside of the lighting device 1, and does not interfere with light transmission from the light-emitting element 11 can be used.
Moreover, a diffusing agent may be mixed in the resin material. The cover 20 in which the diffusing agent is dispersed can diffuse the light when the strong light of the light emitting element 11 passes through the cover 20 to keep the entire room bright. For this reason, when the illumination device 1 is viewed from the place where the light is irradiated, the strong light emitted from the light source 13 and the light reflected by the reflection member 14 become uniform, and the illumination device 1 is as if the light source 13 and the reflection member 14 are. It looks as if the whole is emitting light.

(Light source unit support member)
FIG. 8 is a perspective view showing the appearance of the light source unit support member 17, the terminal block cover 18, and the mounting member 19. As shown in FIG. 8, the light source unit support member 17 includes a pair of mounting members for connecting the main body 171 that supports the light source unit 30, and the light source unit support member 17 and the mounting member 19 (see FIGS. 1A and 1B). And a fixing portion 172.

  The main body portion 171 includes a top plate portion 171 a (main surface portion) that covers the upper surfaces of the light source unit 30 and the power supply unit 16, a slope portion 171 b that is inclined along the shape of the heat radiation fin 152 of the heat radiator 15, and the side surface of the light source unit 30. And an end portion of the side surface portion 171c that is bent in the inner direction of the lighting device 1. The light source unit support member 17 is entirely formed of a metal plate.

  The top plate portion 171a is formed in a rectangular thin plate shape, covers the upper surfaces of the light source unit 30 and the power supply unit 16, and prevents dust from entering the lighting device 1. Moreover, the power supply part 16 (refer FIG. 1A and B) is attached to the top-plate part 171a. The attachment of the power supply unit 16 will be described later. As shown in FIG. 5, a terminal block 162, which is a part of the power supply unit 16, is disposed on the top surface of the top plate portion 171a. The terminal block 162 is connected to a power supply cable 167 (see FIGS. 3 and 5) derived from the power supply unit 16. For this reason, the top plate portion 171a has a hole portion 173 through which the power supply cable 167 passes from one surface of the top plate portion 171a to the other surface.

  The slope portion 171b is formed by bending one side of the top plate portion 171a. The slope portion 171b is formed in a shape along the heat radiation fins 152 of the heat radiator 15. The slope portion 171b has a plurality of vent holes 174. The vent 174 has an opening 174a in which a part of the inclined surface part 171b is opened, and an eaves part 174b protruding along one side above the opening 174a. For example, in the light source unit support member 17 shown in FIG. 8, the opening 174a is formed in a slit shape extending in the lateral direction. The eaves part 174b is formed so as to cover the opening 174a when viewed from above. The eaves part 174b prevents dust from entering the lighting device 1 through the opening 174a.

  The side surface portion 171c is formed by bending one side of the inclined surface portion 171b in the same direction as the bending direction of the inclined surface portion 171b. The side surface portion 171c has a plurality of vent holes 175. The vent 175 is formed of an opening in which a part of the side part 171c is opened. For example, in the light source unit support member 17 shown in FIG. 8, the vent 175 is formed in a slit shape extending in the lateral direction.

  The side surface portion 171c has holes 176 at both ends sandwiching a plurality of vent holes 175. A screw is inserted into the hole 176 from the light source unit support member 17 outer side. The side surface of the heat radiator 15 is fixed to the inner surface of the side surface portion 171c by a screw S17 inserted in the hole 176 (see FIG. 5). The side surface portion 171 c is disposed so as to be in contact with the side surface of the radiator 15. Thereby, the heat diffused in the radiator 15 can be released to the light source unit support member 17. Since the light source unit support member 17 has a large surface area and is exposed to the outside of the lighting device 1, it has high heat dissipation. For this reason, when the heat radiator 15 and the light source unit support member 17 are in contact with each other, the heat of the heat radiator 15 diffuses to the light source unit support member 17 and is radiated by the light source unit support member 17. For this reason, the luminaire 1 can efficiently dissipate the high-temperature heat generated from the light emitting element 11.

  The protruding portion 171d is formed by bending an end portion in the lower direction (floor direction) of the side surface portion 171c toward the inside of the lighting device 1, that is, the light source unit 30 side. The protrusion 171d is formed so as to be able to engage with a guide groove 154 (see FIG. 7) of the radiator 15. When assembling the lighting device 1, the protrusion 171 d is engaged with the guide groove 154 of the radiator 15. The protruding portion 171d may be formed in a shape that protrudes uniformly, or may be formed in a shape that protrudes intermittently. The guide groove 154 that engages with the protruding portion 171d is formed continuously from the front surface to the back surface of the radiator 15. For this reason, even if the protrusion 171d has a shape in which the protrusion 171d protrudes intermittently, the protrusion 171d can be slid along the guide groove 154.

  The attachment member fixing portion 172 is formed in a plate shape and protrudes upward (toward the ceiling) from the main body portion 171. The attachment member fixing portion 172 is provided at the center of the front side end portion and the center of the rear side end portion of the top plate portion 171a. A screw hole 172 a is formed in the attachment member fixing portion 172. A screw S19 (see FIG. 1A, B, etc.) for fixing the attachment member 19 and the attachment member fixing portion 172 is inserted into the screw hole 172a. FIG. 8 shows an example in which two round screw holes 172 a are formed in each of the pair of attachment member fixing portions 172.

(Mounting member)
The attachment member 19 is fixed to the light source unit support member 17 along the direction of the power supply unit 16 and attached to the attachment surface. Thereby, since the upper part of the heat radiator 15 is not covered, heat dissipation is not inhibited. Further, the center of gravity of the lighting device 1 is stabilized. The attachment member 19 is formed of a metal plate in the same manner as the light source unit support member 17.

As shown in FIG. 8, the mounting member 19 includes a horizontal plate portion 191 facing a mounting surface such as a ceiling, and both ends in the longitudinal direction of the horizontal plate portion 191 are bent and extends downward from both ends of the horizontal plate portion 191. And a pair of vertical plate portions 192.
The horizontal plate portion 191 has a hole portion 191a for inserting a suspension bolt (not shown) protruding from the attached surface.

The vertical plate portion 192 has screw holes 192a and 192b. FIG. 8 shows an example in which one round screw hole 192a and one arch-shaped screw hole 192b are formed in each of the pair of vertical plate portions 192.
The front end portion of the vertical plate portion 192 is disposed so as to overlap the attachment member fixing portion 172 of the light source unit support member 17. At this time, the vertical plate portion 192 and the attachment member fixing portion 172 are arranged at positions where the screw holes 192a and 192b and the two screw holes 172a of the attachment member fixing portion 172 face each other. The mounting member 19 includes a screw hole 192a and a screw hole 172a, and a screw S19 inserted into the screw hole 192b and the screw hole 172a, respectively, and a nut N19 (see FIGS. 1A and B) that is attached to the screw S19. Fixed to. The attachment member 19 is detachable from the light source unit support member 17.

  In the mounting member 19 shown in FIG. 8, of the two screw holes 192a and 192b provided in the vertical plate portion 192, the upper screw hole 192a has a round shape and the lower screw hole 192b has an arch shape. doing. That is, the attachment member 19 and the light source unit support member 17 are almost completely fixed to the screw hole 192a portion by screws. On the other hand, at the portion of the arch-shaped screw hole 192b, the mounting member 19 and the light source unit support member 17 are fixed in a state where the screw can move within the arch-shaped screw hole 192b.

  Thereby, the angle of the light source unit support member 17 with respect to the attachment member 19 can be changed. By changing the angle of the light source unit support member 17, for example, the mounting operation can be facilitated when the lighting device 1 is mounted. Moreover, the range which the illuminating device 1 irradiates can be changed by changing the angle of the light source unit support member 17 with respect to the attachment member 19.

(Terminal block cover)
The terminal block cover 18 is attached to the light source unit support member 17 so as to cover the terminal block 162 exposed from the light source unit support member 17. The terminal block cover 18 prevents dust from adhering to the terminal block 162.
As shown in FIG. 8, the terminal block cover 18 has a pair of side walls 181 arranged substantially perpendicular to the light source unit support member 17 and a pair of side wall portions 181 in a state where a space is held between the light source unit support members 17. An upper surface portion 182 that connects upper end portions of the side wall portions 181 and an opening 183 are provided.
The terminal block cover 18 is formed of a metal plate in the same manner as the light source unit support member 17. A terminal block 162 is disposed in a space formed by the light source unit support member 17 and the pair of side wall portions 181 and the upper surface portion 182 (see FIG. 3). Further, the power cable is connected to the terminal block 162 through the opening 183 (not shown).

(Power supply part)
The power supply unit 16 will be described with reference to FIGS. 9 to 11.
FIG. 9 is a perspective view illustrating a state where the light source unit support member 17, the terminal block cover 18, and the attachment member 19 are removed from the lighting device 1.
10A and 10B are views showing a state in which a part of the lower surface side of the power supply box 161 (see FIG. 9) that is an exterior body of the power supply unit 16 is removed from the lighting device 1. 10A is a bottom view of the lighting device 1 with a part of the lower surface side of the power supply box removed, and FIG. 10B is a perspective view from the lower surface of the lighting device 1 with a part of the lower surface side of the power supply box removed. .

FIG. 11 is a cross-sectional view illustrating a state where the light source unit 30 and the cover frame 21 are removed from the lighting device 1.
As shown in FIGS. 9, 10 </ b> A, and 10 </ b> B, the power supply unit 16 includes a power supply box 161 that is an exterior body of the power supply unit 16 and a terminal block 162 connected to a power supply cable 167 led out from the power supply unit 16. A circuit board 163 including a power supply circuit housed in the power supply box 161, a capacitor 164 that is one of electronic components mounted on the circuit board 163, and a heat dissipation sheet 165 disposed in contact with the capacitor 164 The heat radiating plate 166 disposed in contact with the heat radiating sheet 165, the power supply cable 167 that electrically connects the terminal block 162 and the circuit board 163, and the circuit board 163 and the light emitting element 11 are electrically connected. A power supply cable 168. As shown in FIG. 11, the power supply unit 16 is fixed to the light source unit support member 17 in advance.

  The power supply box 161 has a hollow rectangular parallelepiped shape. The power supply box 161 is formed of a metal plate. As shown in FIG. 11, the power supply box 161 has a protrusion 161 b that protrudes toward the light source unit 30 and engages with the guide groove 154 of the radiator 15 on the surface facing the light source unit 30. FIG. 11 shows an example in which the power supply unit 16 is provided with a hook-shaped protrusion 161b whose tip is bent. The protrusion 161b is formed with a predetermined length (see FIG. 3).

  When the hook-shaped protrusion 161b is formed in a cross-sectional hook shape and is engaged with the guide groove 154 of the heat radiator 15, the protrusion 161b is difficult to come off from the guide groove 154. Further, by extending the protrusion length of the protrusion 161b (the length from the surface of the power supply box 161 to the bent portion of the bowl shape) with respect to the depth of the guide groove 154, the space between the power supply portion 16 and the radiator 15 is increased. A certain space is formed. For this reason, the power supply part 16 becomes difficult to receive the heat from the heat radiator 15. In addition, the heat of the power supply unit 16 is less likely to diffuse into the radiator 15. Therefore, the radiator 15 can efficiently dissipate the heat generated from the light emitting element 11.

  The terminal block 162 has a connection portion to which a power cable led out from the ceiling through a hole or the like or a power cable routed along the ceiling (both not shown) is connected. Further, as shown in FIG. 9, the terminal block 162 is connected to a power supply cable 167 connected to the circuit board 163. The terminal block 162 is a connection part for supplying power from the commercial power source to the circuit board 163. As shown in FIG. 11, the terminal block 162 is disposed on the top surface of the top plate portion 171 a of the light source unit support member 17. The terminal block 162 is covered with a terminal block cover 18 and connected to a power cable (not shown) inserted into the opening 183 of the terminal block cover 18. The terminal block 162 may be fitted with a silicon cover (not shown) that covers the terminal block 162 in contact with the surface of the terminal block 162.

The circuit board 163 has a mounting surface 163a on which a plurality of electronic components are mounted. 10A and 10B illustrate a capacitor 164 as an electronic component mounted on the circuit board 163. 10A and 10B, some electronic components are omitted.
The power supply circuit provided in the circuit board 163 converts, for example, AC power supplied from the power supply cable 167 into DC power, and outputs (that is, DC power) the light emitting element substrate 12 via the power supply cable 168. To the light emitting element 11 (see FIG. 5). As illustrated in FIG. 10B, the circuit board 163 is disposed on the light source unit support member 17 side in the internal space of the power supply unit 16.

  The capacitor 164 mounted on the circuit board 163 on the light emitting element substrate 12 side is a component that generates a large amount of heat among electronic components mounted on the mounting surface 163 a of the circuit board 163. Therefore, the capacitor 164 is arranged with the heat dissipation sheet 165 in contact therewith. Further, the heat radiating sheet 165 is disposed in a state where the heat radiating plate 166 is in contact therewith. As the heat dissipation sheet 165, for example, a silicone material, an acrylic material, an epoxy material, or a material obtained by mixing these materials with a material having high thermal conductivity such as ceramics can be used. Moreover, as the heat sink 166, a high heat conductive metal such as an aluminum plate or a copper plate can be used.

  As shown in FIGS. 10A and 10B, the heat sink 166 is connected to a part of the power supply box 161. For this reason, the heat radiating plate 166 can diffuse the heat received from the capacitor 164 through the heat radiating sheet 165 to the power supply box 161. As shown in FIG. 9, a part of the power supply box 161 is exposed to the outside of the lighting device 1. For this reason, the heat received by the power supply box 161 is radiated to the space around the lighting device 1. Further, as shown in FIG. 11, the power supply box 161 is fixed to the light source unit support member 17 exposed to the outside of the lighting device 1. For this reason, the heat received by the power supply box 161 is diffused to the light source unit support member 17 and is radiated to the space around the lighting device 1. That is, both the heat dissipation sheet 165 and the heat dissipation plate 166 function as a heat dissipation member.

  The electronic component mounted on the circuit board 163 may be covered with a heat radiating resin. In addition to the electronic component, the surface portion of the circuit board 163 on which the electronic component is not mounted may be covered with a heat radiating resin. As the heat-dissipating resin, a resin material having high thermal conductivity and insulation, or a material obtained by mixing these materials with a material having high thermal conductivity such as ceramics can be used. Thereby, while improving the heat dissipation of the electronic component with a large emitted-heat amount, the insulation of electronic components can be ensured.

(Cover frame)
The cover frame 21 is an exterior frame that covers the light source unit 30 and the power supply unit 16 from below. The cover frame 21 is formed of a metal plate similarly to the light source unit support member 17.
Returning to FIG. 3 from FIGS. 1A and 1B, the cover frame 21 is a frame provided with an opening 211 that exposes the cover 20 that transmits light from the light emitting element 11. As shown in FIG. 3, the cover frame 21 has screw holes 212a, 212b, 212c, and 212d (may be described as 212a to 212d) on the side surface. The cover frame 21 is attached to the side surface of the radiator 15 by a plurality of screws S21 (see FIGS. 1A and 1B) inserted into the screw holes 212a to 212d. Moreover, the cover frame 21 may have a fence-like part or a net-like part that covers the lower surface of the cover frame 21 and is provided so as to protrude to the lower surface side from the surface of the cover 20 (not shown). By providing a fence-like part or a net-like part provided so as to protrude from the surface of the cover 20 to the lower surface side, a ball or the like is prevented from directly hitting the cover 20 when the lighting device 1 is used in a gymnasium. be able to.

(1-3) Mounting Method of Light Source Unit A mounting method of the light source unit will be described with reference to FIGS.
As shown in FIG. 11, the light source unit 30 is inserted by being slid with respect to the light source unit support member 17 to which at least the power supply unit 16 is attached. The terminal block cover 18 and the attachment member 19 may be attached after the light source unit 30 is inserted.

  As described above, the guide groove 154 is formed continuously from the front surface to the back surface of the heat radiator 15 (see FIG. 7). Further, the protruding portion 171d of the light source unit support member 17 is formed continuously from the front surface to the back surface of the light source unit support member 17 (see FIG. 3). For this reason, for example, the rear surface of the heat radiator 15 and the front surface of the light source unit support member 17 face each other, and the light source unit 30 is moved in the rear direction of the light source unit support member 17 while engaging the protrusions 171d and 161b with the guide grooves 154. By pushing into the light source unit 30, the light source unit 30 slides and is easily disposed in the light source unit support member 17. The light source unit 30 is fixed to the light source unit support member 17 by being screwed after being disposed at a predetermined position in the light source unit support member 17.

(1-4) Modification Examples Instead of the light source unit support member 17 of the illumination device 1 according to the first embodiment of the present disclosure, for example, a light source in which the light source units 30 illustrated in FIG. 12 can be inserted in two rows in the sliding direction. A unit support member 67 can be used.
In the light source unit support member 67 shown in FIG. 12, the same reference numerals are given to portions common to the light source unit support member 17 of the illumination device 1, and description thereof is omitted.
The light source unit support member 67 includes a main body 671 that supports the two light source units 30 from the front to the back of the light source unit support member 67, and a pair of attachment members for connecting the light source unit support member 67 and the attachment member 69. And a fixing portion 172.

The main body portion 671 includes a top plate portion 671 a that covers the upper surfaces of the light source unit 30 and the power supply unit 16, a slope portion 671 b that is inclined along the shape of the radiation fins 152 of the radiator 15, and a side surface that faces the side surface of the light source unit 30. A portion 671c and an end portion of the side surface portion 171c have a protruding portion 671d that is bent in the inner direction of the lighting device 1.
The top plate portion 671a, the slope portion 671b, the side surface portion 671c, and the protruding portion 671d are the top plate portion 171a, the slope portion 171b, the side surface portion 171c of the light source unit support member 17 except that the length in the vertical direction is doubled. It has the same configuration as the protruding portion 171d and exhibits the same function.

The mounting member 69 has the same configuration as the horizontal plate portion 191 of the mounting member 19 except that the length of the horizontal plate portion 691 is changed in accordance with the shape of the light source unit support member 67, and has the same function. Demonstrate.
The light source unit 30 attached to the light source unit support member 67 is the same as the light source unit 30 attached to the light source unit support member 17. For this reason, the light source unit 30 is supported by the light source unit support member 67 in a state of being arranged in two vertical rows in the insertion direction of the light source unit 30.

  The illumination device according to the first embodiment of the present disclosure can be a large illumination device by changing the lengths of the light source unit support member and the attachment member and changing the number of light source units 30 to be inserted.

[Effect of the first embodiment]
According to the lighting device according to the first embodiment of the present disclosure described above, the following effects can be obtained.
(1) Since the power supply unit is not provided on the upper part of the light source, the heat dissipation in the heat radiator that conducts the heat generated from the light emitting element is not hindered, and the heat dissipation is improved.
(2) Since the power supply unit is not disposed above the heat radiating body, the power source unit is not heated by the heat radiated from the heat radiating body, so that safety is high.

(3) In the heat dissipating body in which a plurality of heat dissipating fins are formed, the heat dissipating fins that easily transmit heat generated in the light emitting element provided at a position facing the light emitting element mounting region where the light emitting element is mounted are the remaining heat dissipating fins. It is formed longer than (a heat dissipating fin provided at a position facing a region around the light emitting element mounting region). Since the radiation fin provided in the position facing the light emitting element mounting region is longer and has a larger surface area than the remaining radiation fins, the heat of the light emitting element is efficiently radiated.
(4) Since the radiator is arranged with a space between the side surface of the power supply unit, the heat generated in the power supply unit is not easily transmitted to the radiator, and only the heat of the light emitting element that generates high heat is efficient. Can dissipate heat.

(5) Since the heat sink is fixed to the light source unit support member in contact with the inner surface of the light source unit support member, it diffuses to the light source unit support member that has a large surface area and is exposed outside the lighting device. Heat can be released, and heat dissipation is further improved.
(6) By engaging the light source unit support member and the protruding portion of the power source unit with the guide groove of the light source unit, the light source unit can be slid and easily disposed inside the light source unit support member. For this reason, it is easy to attach the light source unit.

(7) Since the attachment member for attaching the lighting device to the ceiling is fixed to the light source unit support member along the direction of the power supply unit, the upper portion of the radiator is not covered and heat dissipation is not hindered. In addition, the center of gravity of the lighting device is stabilized.
(8) By providing the terminal block cover that covers the terminal block, dust is prevented from adhering to the terminal block.

(9) Since the electronic components mounted on the circuit board included in the power supply unit are covered with the heat-dissipating resin, the heat dissipation of the electronic components generating a large amount of heat is improved and the insulation between the electronic components is ensured. .
(10) Of the electronic components mounted on the circuit board, a heat generating member connected to a power supply box such as a heat radiating sheet and a heat radiating plate is brought into contact with a particularly large capacitor. This improves the heat dissipation of the capacitor.

2. 2nd Embodiment The illuminating device which concerns on 2nd Embodiment of this indication is demonstrated with reference to the following FIG. In FIG. 13, parts that are the same as those of the lighting device 1 according to the first embodiment are given the same reference numerals, and descriptions thereof are omitted.
FIG. 13 is a perspective view illustrating an appearance of the illumination device 100 according to the second embodiment. The lighting device 100 according to the second embodiment of the present disclosure is characterized in that a power cable 41 led out is provided instead of the terminal block 162 and the power supply cable 167 of the lighting device 1 according to the first embodiment. have.
Since the configuration other than this is the same as that of the lighting device 1 of the first embodiment, the configuration related to the power cable 41 and the power cable 41 will be mainly described.

The power cable 41 is fixed to the light source unit support member 17 by a cable gland 40 attached to the power cable 41. The top plate portion 171a of the light source unit support member 17 has a hole (not shown). The cable gland 40 is fixed at a position facing the hole of the top plate portion 171a.
As shown in FIG. 13, the power cable 41 includes two electric wires 41a and 41b and a covering portion 41c that covers the electric wires 41a and 41b. The electric wires 41a and 41b are connected to the circuit board 163 through the holes of the top plate portion 171a. Further, the power cable 41 is routed through a hole 191 b provided in the attachment member 19.

[Effects of Second Embodiment]
According to the lighting device according to the second embodiment described above, in addition to the effects described in (1) to (7), (9), and (10) of the lighting device according to the first embodiment, the following effects are obtained. Can be obtained.
(11) Since the connection portion of the power cable is not exposed to the outside of the lighting device 100, safety is improved.

As described above, the light source unit 30 of the above embodiment is
A plurality of light emitting elements 11 having a rectangular shape;
A rectangular light-emitting element substrate 12 on which a plurality of light-emitting elements 11 are mounted in a matrix;
A radiator 15 provided on the surface of the light emitting element substrate 12 opposite to the surface on which the light emitting element 11 is mounted;
A surface of the light emitting element substrate 12 on which the plurality of light emitting elements 11 are mounted is provided so as to surround a rectangular light emitting element mounting region X on which the plurality of light emitting elements 11 are mounted. A reflecting member 14 having a shape spreading with respect to
A cover 20 provided so as to cover the reflecting member 14 and the light emitting element mounting region X and having translucency,
The power consumption per light emitting element 11 is 0.1 W or more and 0.7 W or less,
The length L2 in the longitudinal direction of the light emitting element mounting region X is 82% or less of the length L1 in the longitudinal direction of the light emitting element substrate 12. The length L4 in the short direction of the light emitting element mounting region X is 52% or less of the length L3 in the short direction of the light emitting element substrate 12.

  By spreading the light emitting elements 11 within such a range, out of the light emitted from the light emitting elements 11, the light emitted from the light emitting elements 11 in an oblique direction can be effectively reflected by the reflecting member 14, and the light emitting elements 11 The light can be efficiently guided to the main emission direction 11 (the direction perpendicular to the paper surface of FIG. 14 and facing forward). That is, even if the lighting device having the light source unit 30 is installed on a high ceiling (for example, a ceiling of about 5 m from the floor surface), it is possible to increase the light extraction efficiency as compared with the case where it is out of the above range. Become.

  In the said embodiment, the power consumption per light emitting element 11 is 0.15 W or more and 0.5 W or less.

  According to this configuration, it is possible to ensure both light extraction efficiency and power consumption.

  As a preferred embodiment, the longitudinal direction of the light emitting element 11 is provided along the short direction of the light emitting element substrate 12, and the short direction of the light emitting element 11 is provided along the longitudinal direction of the light emitting element substrate 12. Is mentioned.

  As a preferred embodiment for obtaining uniform surface light emission without unevenness, it is mentioned that the distance between the plurality of light emitting elements 11 in the short direction is longer than the distance between the plurality of light emitting elements 11 in the longitudinal direction.

  As a preferred embodiment for obtaining uniform surface light emission without unevenness, the pitch in the longitudinal direction between the centers 11 a of the plurality of light emitting elements 11 is longer than the pitch in the short direction between the centers 11 a of the plurality of light emitting elements 11. Can be mentioned.

  As a preferred embodiment for obtaining uniform surface light emission without unevenness, the plurality of light emitting elements 11 have the same shape.

  As a preferred embodiment, the cover 20 is transparent.

  As a preferred embodiment, the cover 20 has light diffusibility.

  The illuminating device 1 according to the embodiment includes a plurality of the light source units 30 and includes a power supply unit 16 that is provided between the plurality of light source units 30 and supplies power to the plurality of light emitting elements 11.

  According to this configuration, it is possible to provide an illumination device with improved light extraction efficiency.

[Others]
The scope of the present disclosure is not limited to the illustrated and described exemplary embodiments, but includes all embodiments that provide the same effects as those intended by the present disclosure. Further, the scope of the present disclosure is not limited to the combinations of features of the invention defined by the claims, but may be defined by any desired combination of specific features among all the disclosed features.

DESCRIPTION OF SYMBOLS 1,100 Illuminating device 11 Light emitting element 12 Light emitting element board | substrate 14 Reflecting member 15 Radiator 16 Power supply part 20 Cover 30 Light source unit X Light emitting element mounting area

Claims (9)

A plurality of light emitting elements having a rectangular shape;
A rectangular light emitting element substrate on which the plurality of light emitting elements are mounted in a matrix; and
A radiator provided on a surface opposite to a surface on which the light emitting element is mounted of the light emitting element substrate;
A surface of the light emitting element substrate on which the plurality of light emitting elements are mounted is provided so as to surround a rectangular light emitting element mounting region on which the plurality of light emitting elements are mounted, and in a main emission direction of the plurality of light emitting elements. A reflecting member having a shape that spreads out,
A light-transmitting cover provided so as to cover the reflective member and the light emitting element mounting region,
The power consumption per said light emitting element is 0.1 W or more and 0.7 W or less,
The length in the longitudinal direction of the light emitting element mounting region is 82% or less of the length in the longitudinal direction of the light emitting element substrate, and the length in the short direction of the light emitting element mounting region is short of the light emitting element substrate. A light source unit that is 52% or less of the length in the hand direction.   The light source unit according to claim 1, wherein power consumption per one light emitting element is 0.15 W or more and 0.5 W or less.   The longitudinal direction of the light emitting element is provided along the short direction of the light emitting element substrate, and the short direction of the light emitting element is provided along the longitudinal direction of the light emitting element substrate. The light source unit described.   The light source unit according to any one of claims 1 to 3, wherein a distance between the plurality of light emitting elements in a short direction is longer than a distance between the plurality of light emitting elements in a longitudinal direction.   The light source unit according to claim 1, wherein a pitch in a longitudinal direction between centers of the plurality of light emitting elements is longer than a pitch in a short direction between centers of the plurality of light emitting elements.   The light source unit according to claim 1, wherein the plurality of light emitting elements have the same shape.   The light source unit according to claim 1, wherein the cover is transparent.   The light source unit according to claim 1, wherein the cover has light diffusibility. A plurality of light source units according to any one of claims 1 to 8,
An illumination device comprising a power supply unit that is provided between the plurality of light source units and supplies power to the plurality of light emitting elements.

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