JP5935397B2 - lighting equipment - Google Patents

Description

  The present invention relates to a lighting fixture using a light emitting element as a light source.

  2. Description of the Related Art Conventionally, lighting fixtures that include a light source such as a fluorescent lamp in a frame are known as lighting fixtures provided on the ceiling. In recent years, various lighting fixtures including light-emitting elements such as LEDs having characteristics such as small size, low power consumption, and long life have been proposed as the brightness of light-emitting elements increases (see, for example, Patent Document 1). .

JP 2011-049154 A

However, when a light-emitting element such as an LED is used as a light source, it is necessary to efficiently dissipate heat generated by the light-emitting element, and thus a more effective heat dissipation structure is desired.
This invention is made | formed in view of the situation mentioned above, and aims at providing the lighting fixture which improved heat dissipation.

In order to achieve the above object, the present invention provides a mounting body having a mounting surface for mounting a light emitting element on a frame disposed on a ceiling with a gap along an inner side surface of the frame body, The intake body is inclined so that the light of the frame is directed laterally from the opening of the frame body, and air is taken into the back surface side of the mounting surface between the frame body and the mounting body on the opening side. An air flow path is formed between the inner surface of the frame body and the back surface of the mounting surface opposite to the portion where the light emitting element is mounted , and the inner surface of the frame body. A power supply device for the light emitting element is provided in a gap between the mounting surface and the back surface of the mounting surface so as to face the air flow path along the back surface of the mounting surface. Of the air flow path along the back surface of the mounting surface by the power supply device. Wherein the width of the part is narrowed.

In the above SL configurations, power supply cover may be provided on the power supply.
The said structure WHEREIN: The said power supply cover may be provided along the inner surface of the said frame.

  The said structure WHEREIN: You may provide the holding | maintenance part which hold | maintains the said power supply device with a clearance gap between the inner surface of the said frame, and the said attachment surface above the said inlet.

In the above-described configuration, a fixing tool for fixing the frame body to the ceiling is provided, a facing surface facing the fixing tool is provided on the mounting surface on the ceiling side, and a power source is provided in a space between the fixing tool and the facing surface. You may arrange | position a connection part.
The said structure WHEREIN: It has a cover which covers the said light emitting element of the said attachment surface, and permeate | transmits light, The shape where at least one part of the cross-sectional shape followed the inclination of the said attachment surface may be sufficient.

  According to the present invention, a mounting surface for attaching a light emitting element is provided on the frame disposed on the ceiling with a gap along the inner surface of the frame, and light from the light emitting element is directed to the side from the opening of the frame. The mounting surface is inclined so that an intake port for taking in air is provided on the back side of the mounting surface between the frame on the opening side and the mounting surface, so that the air is taken in from the intake port and flows along the back side of the mounting surface. Since heat of the light-emitting element can be radiated to the air, heat dissipation can be improved.

1 is an overview perspective view showing a ceiling lighting device (lighting device) according to a first embodiment of the present invention. It is a figure which shows the lighting fixture for ceilings from the front side. It is a perspective view which shows the lighting fixture for ceilings from the back side. It is a perspective view which shows the lighting fixture for ceiling which decomposed | disassembled the fixing tool from the back side. It is a disassembled perspective view which shows an instrument main body. It is a figure which shows the lighting fixture for ceiling which abbreviate | omitted the cover from the front side. It is a figure which shows the VII-VII cross section of FIG. It is a perspective view which shows a power supply unit from the front side. It is a perspective view which shows a power supply unit from the back side. It is a figure which shows the assembly | attachment of a power supply unit. It is a figure which shows the assembly | attachment of a power supply unit. It is a figure which shows the assembly | attachment of a power supply unit. It is a figure which shows the assembly | attachment of a power supply unit. It is a figure which shows the lighting fixture for ceilings concerning the 2nd Embodiment of this invention from the front side. It is a figure which shows the XV-XV cross section of FIG. It is a figure which shows the lighting fixture for ceiling which concerns on the modification of this invention from the front side. It is a figure which shows the XVII-XVII cross section of FIG. It is a figure which shows the lighting fixture for ceiling which concerns on the other modification of this invention from the front side.

Embodiments of the present invention will be described below with reference to the drawings.
<First Embodiment>
FIG. 1 is an overview perspective view showing a ceiling lighting apparatus according to the first embodiment. FIG. 2 is a view showing the ceiling luminaire from the front side, and FIG. 3 is a perspective view showing the ceiling luminaire from the back side. Moreover, FIG. 4 is a perspective view which shows the lighting fixture for ceiling which decomposed | disassembled the fixture from the back side.
As shown in these drawings, a ceiling lighting device (lighting device) 1 is directly attached to a relatively high ceiling surface or the like so-called a medium ceiling (about 4 to 5 m) such as a factory or a backyard. It is a direct-attached lighting fixture, and is configured by housing a light source 5 in a fixture body 3.

  The instrument main body 3 includes a substantially rectangular frame 7 having an opening at the front and the back, and a cover 9 provided on the front opening 6A side of the frame 7, and the instrument main body 3 is interposed via a fixture 10. Installed on the ceiling. As shown in FIG. 2, the frame body 7 of the present embodiment has a long frame 7 </ b> A extending in the longitudinal direction and a short frame 7 </ b> B extending in the short direction. As shown, an inner wall 7C is provided along the inner side surface 7B1 of the short frame 7B so as to face the short frames 7B on both sides. The inner wall 7C may be omitted. At the upper part of each frame 7A, 7B, extending portions 7A2, 7B2 extending in a hook shape are provided on the inner side. Further, a connecting portion between the inner side surface 7A1 of the longitudinal frame 7A and the extending portion 7A2 is a corner portion 7A3.

As shown in FIGS. 3 and 4, the fixture 10 includes a main body 11 that covers the back surface of the frame body 7, and a main body reinforcing body 13 that reinforces the main body 11. The main body 11 is provided with an engaging portion 11A that engages with the extending portion 7B2 of the short frame 7B. The main body reinforcement 13 is provided along the longitudinal direction at the approximate center of the main body 11 on the ceiling surface side, and is fixed by screws 12. In addition, the fixing method of the main body reinforcing body 13 may not be a screw, and the main body reinforcing body 13 may be omitted.
In the main body 11 and the main body reinforcing body 13, lead holes 15A and 15B for drawing power cables (power lines) such as commercial power sources are formed in a substantially central part, and the instrument main body 3 is placed on both sides of the lead holes 15A and 15B. Fastening holes 17A and 17B are provided for fastening to the surface with scissors or the like. A wiring protector 18 for protecting the power cable is attached to the lead-in holes 15A and 15B.
The instrument body 3 is directly installed on the ceiling surface by being fixed to the fixture 10 fastened to the ceiling surface with screws 19.

FIG. 5 is an exploded perspective view showing the instrument body 3. FIG. 6 is a view showing the ceiling lighting device 1 from which the cover 9 is omitted from below. FIG. 7 is a view showing a VII-VII cross section of FIG.
As shown in these drawings, in the instrument main body 3, there are a mounting body 20 that supports the light source 5, and a plurality (two in this embodiment) of power supply units (power supply devices) that supply power to the light source 5. 30 is provided. The attachment body 20 is made of a material having high thermal conductivity (for example, aluminum) and includes a pair of attachment surfaces 21 to which the light source 5 is attached. Each attachment surface 21 is provided with a gap R along the inner side surface 7A1 of the longitudinal frame 7A, and the upper portion thereof is inclined in a direction away from the inner side surface 7A1 of the longitudinal frame 7A. The attachment body 20 of the present embodiment is formed by bending a thin plate, whereby a pair of attachment surfaces 21, a concave bottom surface (opposing surface) 23 that connects the pair of attachment surfaces 21, and a support surface 25 supported by the frame body 7. And the center is formed in a concave shape.
The concave bottom surface 23 is provided opposite to the fixture 10, and a power terminal block (power connection portion) 27 is provided on the back surface of the concave bottom surface 23. A power cable drawn from the lead-in holes 15A and 15B of the fixture 10 is quickly connected to the power terminal block 27, and power is supplied from the power terminal block 27 to the power unit 30 via electric wiring.

The cover 9 is formed of a material (for example, a resin material) that transmits light from the light source 5, and is formed to have approximately the same size as the attachment body 20 in a front view. The cover 9 of the present embodiment is formed of a resin material having a diffusion effect so as to diffuse and radiate light emitted from the light source 5. The cover 9 has an inclined surface 9A facing the mounting surface 21 of the mounting body 20, a concave bottom surface 9B connecting the inclined surface 9A, and a support surface 9C supported by the frame body 7, with the center at the center. It is formed in a concave shape. Thereby, since the volume of the lighting fixture 1 for ceiling becomes small, a feeling of pressure can be suppressed.
The cover 9 and the attachment body 20 are arranged so as to partially overlap each other on the frame body 7 in this order, and are fixed to the frame body 7 by a push screw 29 penetrating the holding portion 43 in the overlapping portion.

  As shown in FIGS. 2 and 7, the instrument main body 3 is provided with an intake port 41 for taking in air on the back side of the mounting surface 21 between the frame body 7 and the mounting surface 21. The intake port 41 extends along the longitudinal frame 7 </ b> A. The power supply unit 30 has a clearance δ between the inner surface 7 </ b> A <b> 1 and the mounting surface 21 above the intake port 41. Is provided. The holding portion 43 according to the present embodiment supports the power supply unit 30 by extending substantially horizontally from the bottom surface of the frame body 7 to the upright portion 43 </ b> A and from the end of the upright portion 43 </ b> A toward the mounting surface 21. And a support portion 43B that has a substantially L-shaped cross section and is provided integrally with the longitudinal frame 7A. A portion where the upright portion 43 </ b> A and the support portion 43 </ b> B are connected constitutes a frame side locking portion 43 </ b> C that locks the power supply unit 30.

Further, as shown in FIGS. 3 and 7, the instrument body 3 is provided with a discharge port 45 for discharging the air taken into the back side of the mounting surface 21. In the present embodiment, the discharge port 45 is formed between the main body 11 and the longitudinal frame 7 </ b> A by forming the main body 11 of the fixture 10 smaller than the rear opening 6 </ b> B of the frame body 7. The position of 45 is not limited to this, and the discharge port 45 can be formed at an arbitrary position of the instrument body 3.
Thus, by providing the intake port 41 and the discharge port 45 in the instrument main body 3, the air taken in from the intake port 41 is attached to the mounting surface 21 in the instrument main body 3 as indicated by an arrow in FIG. 7. The flow path F of the air which flows along the back surface of this and is discharged | emitted from the discharge port 45 to the exterior of the instrument main body 3 is formed.

As shown in FIG. 6, the light source 5 has four linear light sources 50 formed by densely arranging a plurality of (15 in the present embodiment) LEDs (light emitting elements) 53 on a substrate 51 in a line. Therefore, an output substantially equivalent to a 150 W class HID (High Intensity Discharge) lamp is realized. Although LED53 of this Embodiment is comprised as LED with a lens which provided the hemispherical lens so that an LED element might be covered, the structure which abbreviate | omits a lens may be sufficient.
Two of the four linear light sources 50 are arranged linearly along the one-side longitudinal frame 7A, and the remaining two linear light sources 50 are arranged linearly along the other-side longitudinal frame 7A. Since these linear light sources 50 are attached to the inclined attachment surface 21, the light of the LED 53 is directed laterally from the opening 6 </ b> A of the frame body 7.

As shown in FIGS. 4 and 7, the two power supply units 30 are arranged along the longitudinal frames 7A on both sides, and are fixed to the inner side surface 7A1. That is, the power supply unit 30 is disposed facing the air flow path F between the inner side surface 7A1 and the mounting surface 21.
These two power supply units 30 share power supplied to a plurality (four) of linear light sources 50. For example, the power supply unit 30 disposed on one side of the longitudinal frame 7A supplies power to two linear light sources 50 disposed near the power supply unit 30, and the power supply unit disposed on the other side of the longitudinal frame 7A. 30 is configured to supply power to the remaining two linear light sources 50.
Thus, since the power supplied to the plurality of (four) linear light sources 50 is shared by the two power supply units 30, even if one power supply of the power supply units 30 stops, the other power supply causes the line to be A part of the shaped light source 50 can be turned on.

FIG. 8 is a perspective view showing the power supply unit 30 from the front side, and FIG. 9 is a perspective view showing the power supply unit 30 from the back side.
The power supply unit 30 includes a power supply 31, an insulating sheet 33, and a power supply cover 35. The power supply 31 is configured by mounting electronic components on the component mounting surface of the power supply board 31A, and power is supplied to the power supply 31 by electric wiring extending from the power supply terminal block 27 (FIG. 7). The power supply unit 30 will be described with the component mounting surface side of the power supply board 31A as the front surface and the back surface side of the power supply board 31A as the back surface.
The insulating sheet 33 is an insulating member formed, for example, in a cylindrical shape so as to surround the power supply 31, and enhances the insulation performance between the power supply 31 and the power supply cover 35.

The power supply cover 35 is a cover made of a high heat conductive material such as aluminum, and has an upper plate 35A, a rear plate 35B, and a lower plate 35C, and is formed in a substantially U-shaped cross section. Is provided with a flange portion 35D extending substantially perpendicular to the upper plate 35A and extending upward. In the power source cover 35 of the present embodiment, an upper plate 35A, a rear plate 35B, a lower plate 35C, and a flange portion 35D are integrally formed by bending a single thin plate. Both corners 35D2 of the tip 35D1 of the flange 35D are pointed.
The lower plate 35C has an inclined surface 35E inclined inward (upper side), and the inclined surface 35E projects outward and is provided on the frame body side retaining portion 43C (FIG. 7). The power supply side latching | locking part 35F engaged with is formed. The power supply 31 is disposed such that the back surface of the power supply board 31A faces the rear plate 35B of the power supply cover 35, and is supported by the spacer 37 away from the rear plate 35B.

Next, the assembly method of the instrument main body 3 will be described with reference to FIGS.
10 to 13 are diagrams showing the assembly of the power supply unit 30. FIG.
First, as shown in FIG. 5, the long frame 7 </ b> A and the short frame 7 </ b> B are fitted together to form the frame body 7. At this time, the inner wall 7C is arranged inside the short frame 7B and fixed to the short frame 7B. Next, the cover 9 is disposed in the frame body 7, the mounting body 20 assembled with the light source 5 and the power terminal block 27 is disposed on the cover 9 in the frame body 7, and the cover 9 and the mounting body 20 are pressed. It is fixed to the frame 7 by 29.

When the power supply unit 30 is assembled to the frame body 7, as shown in FIG. 10, the power supply unit 30 is disposed between the back surface of the attachment surface 21 and the extending portion 7A2 on the upper portion of the longitudinal frame 7A. Next, as shown in FIG. 11, the flange portion 35D of the power supply unit 30 is placed inside the extending portion 7A2. Next, as shown in FIG. 12, the front end 35D1 of the flange 35D is applied to the upper corner 7A3 of the longitudinal frame 7A, and the power supply unit 30 is rotated about the front end 35D1 so as to be longitudinally It inserts between extension part 7A2 of frame 7A. Then, as shown in FIG. 13, the power supply unit 30 is pushed toward the inner side surface 7 </ b> A <b> 1 of the frame body 7 until the power supply side locking portion 35 </ b> F engages with the frame body side locking portion 43 </ b> C of the holding portion 43. The inclined surface 35E is in contact with and supported by the support portion 43B of the holding portion 43.
Thus, since the power supply unit 30 can be fixed to the frame 7 without screwing, the number of parts can be reduced and the manufacturing process can be simplified. Moreover, since the corner portion 35D2 of the flange portion 35D has a pointed shape, the corner portion 35A2 enters the corner portion 7A3 of the longitudinal frame 7A, so that the power source unit 30 moves even after the power source unit 30 is attached to the frame body 7. There is no. In this embodiment, the power supply side locking portion 35F and the frame body side locking portion 43C are engaged in a convex shape, but the shapes of the power supply side locking portion 35F and the frame body side locking portion 43C are the same. It is not limited to this, and can be changed as appropriate.

  When the appliance main body 3 is directly installed on the ceiling surface, the fixture 10 is first fastened to the ceiling surface, and the extension portion 7B2 of the frame body 7 is hooked on the engaging portion 11A of the fixture 10, so that the frame body 7 can be temporarily fixed to the fixture 10. In this state, the power cable is connected to the power terminal block 27, and then the instrument body 3 is fixed to the fixture 10 with the screws 19.

Next, the operation of the present embodiment will be described with reference to FIG.
Since the intake port 41 for taking in air is provided between the frame body 7 and the attachment surface 21 on the back side of the attachment surface 21, air is taken in from the intake port 41, and the taken-in air is attached to the attachment surface 21. Therefore, the heat of the LED 53 can be radiated to the air flowing on the back side of the mounting surface 21. Moreover, since the intake port 41 is provided on the lower side, a flow of air from the lower side to the upper side can be created by convection of heat without providing a device such as a fan for forcibly flowing the air. Further, since the discharge port 45 is provided on the upper side, the air taken in from the intake port 41 flows smoothly, so that the heat of the LED 53 can be effectively radiated.

  Since the holding unit 43 that holds the power supply unit 30 is provided between the inner side surface 7A1 of the frame 7 and the mounting surface 21, the power source unit 30 can be disposed in the gap R between the inner side surface 7A1 and the mounting surface 21. The frame 7 can be shortened in the lateral direction. Further, since the holding portion 43 is configured to hold the power supply unit 30 with a gap δ above the intake port 41, the air flow path F between the inner side surface 7A1 and the mounting surface 21 is blocked. The power supply unit 30 can be arranged without any problem. Further, since the power supply unit 30 faces the air flow path F, the power supply unit 30 can be cooled by the air flowing through the flow path F. In addition to this, since the holding portion 43 is formed to extend from the lower surface of the frame body 7 toward the back surface of the mounting surface 21, air taken in from the intake port 41 is guided to the holding portion 43, It becomes easy to flow along the back surface of the mounting surface 21, and the heat of the light source 5 can be effectively radiated.

Thus, since the heat of the light source 5 can be effectively cooled, the power terminal block 27 can be attached to the attachment body 20 to which the light source 5 is attached. That is, since the power terminal block 27 can be disposed in the space S between the concave bottom surface 23 of the mounting body 20 and the fixture 10 formed by disposing the power supply unit 30, the frame body 7 can be disposed in the longitudinal direction or the lateral direction. There is no need to lengthen the frame 7 and the frame 7 can be downsized.
Further, since the power terminal block 27 and the power unit 30 are provided not on the fixture 10 side but on the fixture body 3 side, when the ceiling lighting fixture 1 is installed, it is only necessary to connect the power cable to the power terminal block 27. The lighting fixture 1 can be easily installed.

  As described above, according to the present embodiment, the ceiling luminaire 1 has the attachment surface 21 for attaching the LED 53 to the frame 7 arranged on the ceiling, the gap R along the inner side surface 7A1 of the frame 7. The mounting surface 21 is inclined so that the light of the LED 53 is directed to the side from the opening 6A of the frame body 7, and between the frame body 7 and the mounting surface 21 on the opening 6A side, on the back side of the mounting surface 21. The intake port 41 for taking in air is provided. With this configuration, the heat of the LED 53 can be radiated to the air that is taken in from the intake port 41 and flows along the back side of the mounting surface 21, so that the heat dissipation can be improved.

  Further, according to the present embodiment, since the power supply unit 30 of the LED 53 is provided facing the air flow path F between the inner surface 7A1 of the frame 7 and the mounting surface 21, the power supply unit 30 is cooled together with the LED 53. can do.

  Further, according to the present embodiment, since the holding portion 43 that holds the power supply unit 30 with the gap δ between the inner surface 7A1 of the frame body 7 and the mounting surface 21 above the intake port 41 is provided, The power supply unit 30 can be disposed in the gap R between the inner side surface 7A1 of the frame body 7 and the mounting surface 21, and the ceiling lighting device 100 can be reduced in size.

  Moreover, according to this Embodiment, while providing the fixing tool 10 which fixes the frame 7 to a ceiling, the concave bottom face 23 which opposes the fixing tool 10 is provided in the attachment surface 21 of a ceiling side, and the fixing tool 10 and a concave bottom face are provided. The power terminal block 27 is arranged in a space S between the power source 23 and the terminal 23. With this configuration, for example, the frame body 7 can be made smaller in the longitudinal direction and the lateral direction than in the case where the power terminal block 27 is disposed in the gap R between the attachment surface 21 and the inner surface 7A1 of the frame body 7.

<Second Embodiment>
Next, a second embodiment according to the present invention will be described with reference to FIGS.
FIG. 14 is a view showing the ceiling lighting device 100 according to the second embodiment from the front side, and FIG. 15 is a view showing a cross section XV-XV in FIG.
In the ceiling lighting device 100 shown in these drawings, the cover 9 and the attachment body 20 are arranged with a gap D from the lower surface of the frame body 7, and the gap between the frame body 7, the cover 9 and the attachment body 20. D is the inlet 141.
The ceiling luminaire 100 has substantially the same configuration as that of the ceiling luminaire 1 described in the first embodiment except that the ceiling luminaire 100 includes an up-and-down direction inlet 141. Similar components are denoted by the same reference numerals and description thereof is omitted.

However, the above embodiment is an aspect of the present invention, and it is needless to say that the embodiment can be appropriately changed without departing from the gist of the present invention.
For example, in the above embodiment, the frame body 7 is formed in a substantially rectangular shape and the linear light source 50 is provided on both sides of the longitudinal frame 7A. However, the present invention is not limited to this. For example, the linear light source 50 may be provided only on one side of the longitudinal frame 7A as in the ceiling lighting device 200 shown in FIGS. In this case, the inclined surface 9A and the support surface 9C of the cover 9 and the attachment surface 21 and the support surface 25 of the attachment body 20 may be omitted on the other side of the longitudinal frame 7A.
Further, the linear light source 50 may be provided on the short frame 7B side.
Furthermore, like the lighting fixture 300 for ceiling shown in FIG. 18, the frame body 307 may be formed in a substantially square shape, and the linear light source 50 may be provided in each frame 207A.

  Moreover, in the said embodiment, although the center was formed in the concave shape along the attachment body 20, the cover 9 may be formed in flat form. Further, the cover 9 is formed of a material having a diffusion effect, but may be formed of a material having no diffusion effect. Furthermore, although the cover 9 is formed to have a size substantially equal to that of the attachment body 20, the cover 9 may be formed larger than the intake port 41. In this case, an intake port may be provided in the cover. Note that the cover 9 may be omitted.

Moreover, in the said embodiment, although the ceiling lighting fixture provided with LED in the light source was illustrated, this invention is not limited to this, For example, for ceilings provided with other light emitting elements, such as organic EL, in a light source It is also applicable to lighting equipment.
In the above-described embodiment, the ceiling lighting fixture has been described as a direct-attached lighting fixture that is directly attached to a ceiling surface or the like. However, the lighting fixture is not limited to this. For example, the ceiling lighting fixture is suspended from the ceiling. It may be a lower luminaire or an embedded luminaire embedded in a ceiling plate provided via a ceiling space below the ceiling surface.
Moreover, in the said embodiment, although demonstrated as a lighting fixture for ceilings which provides a lighting fixture on a ceiling, a lighting fixture is not limited to this, For example, the shape with a wall provided in a wall may be sufficient.

1,100,200,300 Lighting equipment for ceiling (lighting equipment)
6A opening 7 frame 7A1 inner surface 10 fixture 21 mounting surface 23 concave bottom surface (opposite surface)
27 Power terminal block (power connection)
30 Power supply unit (power supply unit)
41, 141 taking-in port 43 holding part 53 LED (light emitting element)
F channel R gap S space δ gap

Claims (6)

A mounting body having a mounting surface for mounting the light emitting element is provided on the frame disposed on the ceiling with a gap along the inner side surface of the frame body, and light from the light emitting element is laterally opened from the opening of the frame body. The attachment body is inclined so as to face, and an intake port for taking in air is provided between the frame body on the opening side and the attachment body on the back side of the attachment surface, and the inner surface of the frame body An air flow path is formed between a portion of the mounting surface on which the light emitting element is mounted and a back surface on the opposite side ,
In the gap between the inner surface of the frame and the back surface of the mounting surface, the power supply device for the light emitting element is provided facing the air flow path along the back surface of the mounting surface,
The power supply device is disposed so as to be inclined with respect to the inner side surface of the frame body, and the power supply device narrows a part of the width of the air flow path along the back surface of the mounting surface. Characteristic lighting equipment. The lighting apparatus according to claim 1 , wherein the power supply device is provided with a power supply cover. The lighting apparatus according to claim 2 , wherein the power supply cover is provided along an inner surface of the frame. To any one of claims 1 to 3, further comprising a holding portion for holding the power supply device with a gap above the inlet between the inner surface and the mounting surface of the frame The luminaire described. A fixture for fixing the frame to the ceiling is provided, and a mounting surface facing the fixture is provided on the mounting surface on the ceiling side,
The lighting fixture according to any one of claims 1 to 4 , wherein a power connection portion is disposed in a space between the fixture and the facing surface. A cover that covers the light emitting element of the mounting surface and transmits light;
The cover, the lighting device according to any of claims 1 to 5, characterized in that a shape of at least a portion of the cross-sectional shape along the inclination of the mounting surface.

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