JP5519300B2 - lighting equipment - Google Patents

Description

  The present invention relates to a luminaire using an LED unit as a light source.

Conventionally, there exists a lighting fixture using LED as a light source (for example, refer patent document 1).
Hereinafter, based on FIG. 13, the conventional lighting fixture described in Patent Document 1 will be described. In this luminaire 100, a plurality of LED units 102 are mounted on the surface of a substrate 101 in a straight line at predetermined intervals. The LED units 102 are arranged in a plurality of rows, and slits 103 extending substantially along the entire length of the rows along the LED units 102 arranged in a straight line are provided between adjacent rows.

  On the other hand, a plurality of heat radiating fins 105 are attached perpendicularly to the base 104 on the surface of a metal base 104 having substantially the same size as that of the substrate 101 to form a heat sink 106. The heat radiation fins 105 are provided at intervals corresponding to the intervals between the slits 103 of the substrate 101, and are slightly shorter than the length of the slits 103.

Therefore, the radiation fins 105 are inserted into the slits 103 from the back side of the substrate 101 (the lower side in FIG. 13), and the base 104 of the heat sink 106 is attached to the back side of the substrate 101.
Thereby, the heat generated by the LED unit 102 spreads over the substrate 101, and the heat transmitted to the back surface of the substrate 101 is transmitted to the heat sink 106 and spreads over the entire heat sink 106. And since it thermally radiates with the radiation fin 105, the heat | fever which the LED unit 102 emitted can be thermally radiated efficiently.

JP 2004-55229 A (FIG. 2)

  However, when the power supply unit is built into the fixture body using a high-power LED unit, the size of the power supply unit increases and the lighting fixture becomes deeper. Need to be placed. For this reason, since a space is created between the fixture body and the LED unit, the heat dissipation structure for the thickness direction of the substrate 101 or the like as in the above-described lighting fixture described in Patent Document 1 cannot be used alone. It is desirable to efficiently transfer heat to the instrument body.

  The present invention has been made to solve the conventional problems, and an object of the present invention is to provide a luminaire that can efficiently transfer the heat generated by the LED unit to the fixture body and dissipate the heat.

The luminaire of the present invention is mounted on a mounted portion , has an irradiation opening at an end opposite to the mounted portion , and forms a rectangular box-shaped outer shell having a space inside , wherein a light source section for irradiating illumination light from the opening, and a heat radiating portion you radiate heat the light source unit is generated to the outside, an LED unit having a, with provided inside of the instrument body, the power to the LED unit a power supply unit for supplying, with provided inside of the instrument body, and a transfer heat heat conduction means heat of the heat radiating portion in the LED unit, the heat conducting means is exposed to the irradiation opening on the surface, the LED unit is a plurality, is arranged Rutotomoni, a first heat conductive plate you heat transfer heat from the heat radiating portion in the LED unit, directly to the first heat conducting plate Or indirectly contact And a second heat conductive plate that, on the opposite side of the first heat conduction plate, and the third heat conductive plate which directly or indirectly contacts the front Stories second thermally conductive plate, a The first heat conductive plate has a first vertical wall portion whose surface contacts the inner surface of the instrument body, and the second heat conductive plate includes the first heat conductive plate and the third heat conductive plate. Each of the heat conduction plates has a communication space that directly or indirectly contacts the surface and communicates in a predetermined direction therein, and the surface of the third heat conduction plate has the surface of the instrument body. contacting the inner surface, it has a structure that having a second vertical wall portion which is provided without interference with the first vertical wall portion.

  With this configuration, the heat generated by the light source unit of the LED unit that receives power from the power supply unit and irradiates light from the irradiation opening of the device main body is transferred from the heat radiating unit of the LED unit to the device main body through the heat conduction means. Heat is transferred. The heat conduction means includes a first heat conduction plate in which the LED unit is disposed and transfers heat of the heat radiating portion, and a plurality of second heat conductions that directly or indirectly contact the first heat conduction plate. The LED unit emits because it has a plate and a third heat conducting plate in direct or indirect contact with the plurality of second heat conducting plates on the opposite side of the first heat conducting plate The heat is transferred to the instrument body through the first heat conductive plate, the second heat conductive plate, and the third heat conductive plate. At this time, the arrangement direction of the first heat conduction plate and the arrangement direction of the third heat conduction plate intersect each other, so that the first heat conduction plate and the third heat conduction plate are vertically aligned with the edges. A sufficient height can be ensured without interference when the wall portion is provided to increase the strength or to transfer heat by bringing the vertical wall portion into contact with the instrument body. In addition, the direction of heat convection can be controlled.

Further, in the lighting fixture of the present invention, the second heat conducting plate is in direct or indirect contact with the first heat conducting plate on the surface, and extends in a predetermined direction; wherein the front with opposite at a predetermined interval to the plate portion extending in the predetermined direction, a plate portion after directly or indirectly contact with the surface to the third heat conduction plate, and the front plate and connects the rear plate portion erected, have a, and upright plate portion extending in the predetermined direction, wherein the front plate portion, said predetermined inside of the rear plate portion and the standing up plate portion The communication space that communicates in a direction is formed, a plurality of the second heat conduction plates are provided, each of the plurality of second heat conduction plates is disposed in the predetermined direction, and adjacent to each other between the two said standing up plate portion which has a configuration that provided a gap.

  With this configuration, the second heat conduction plate receives the heat of the first heat conduction plate by the front plate portion and transfers the heat received by the front plate portion to the rear plate portion by the surface. Furthermore, since the rear plate portion transfers heat to the third heat conducting plate by the surface, heat can be transferred efficiently. Moreover, since it combines using a some 2nd heat conductive board, a heat conductive means can be formed easily.

  In the present invention, the heat conduction means for transferring the heat generated by the LED unit to the appliance main body includes a first heat conduction plate in which the LED unit is disposed and the heat of the heat radiating portion is transferred, and the first heat conduction plate. A plurality of second heat conductive plates that are in direct or indirect contact with each other and a third heat contact plate that is directly or indirectly in contact with the plurality of second heat conductive plates on the opposite side of the first heat conductive plate. Therefore, the heat generated by the LED unit is transferred to the instrument body via the first heat conductive plate, the second heat conductive plate, and the third heat conductive plate. At this time, the arrangement direction of the first heat conduction plate and the arrangement direction of the third heat conduction plate intersect each other, so that the first heat conduction plate and the third heat conduction plate are vertically aligned with the edges. A sufficient height can be ensured without interference when the wall portion is provided to increase the strength or to transfer heat by bringing the vertical wall portion into contact with the instrument body. Moreover, the lighting fixture which has the effect that the convection direction of heat can be controlled can be provided.

The perspective view which shows the lighting fixture of 1st Embodiment which concerns on this invention. Exploded perspective view of lighting fixture It is the front view which looked at the lighting fixture from the front, (A) is the front of a reflector, (B) is the front of the 1st heat conduction board, (C) is the front of the front board part of the 2nd heat conduction board, (D) is the front of the rear plate (A) is a cross-sectional view at the position IV-IV in FIG. Perspective view of second heat conduction plate Sectional drawing which shows the modification of a 2nd heat conductive board The disassembled perspective view which shows the lighting fixture of 2nd Embodiment which concerns on this invention. Perspective view of second heat conduction plate Sectional drawing which shows the modification of a 2nd heat conductive board The perspective view which shows the 2nd heat conductive board of the lighting fixture of 3rd Embodiment which concerns on this invention. Sectional drawing which shows the modification of a 2nd heat conductive board Sectional drawing which shows the modification of a 2nd heat conductive board Exploded perspective view of a conventional lighting fixture

(First embodiment)
Hereinafter, the lighting fixture of 1st Embodiment of this invention is demonstrated using drawing.
As shown in FIG. 1 and FIG. 2, the luminaire 10 according to the embodiment of the present invention can be used by being attached to, for example, a ceiling 11 that is an attached portion. The lighting fixture 10 has a fixture main body 20 that forms a rectangular box-shaped outline, and transfers heat from the plurality of LED units 30 that are light sources and the LED unit 30 to the fixture main body 20 inside the fixture main body 20. Heat conduction means 40 for radiating heat.

  The instrument body 20 has an irradiation opening 21 on the front surface 20a in the illumination direction, and a frame 22 is detachably attached to the front surface 20a. The frame 22 has a rectangular shape similar to that of the front surface 20 a of the instrument main body 20, and has an opening 22 a having substantially the same size as the irradiation opening 21. A transparent resin cover 23 is attached to the opening 22a. A plurality of, for example, L-shaped attachments 24 for attaching the instrument body 20 to the ceiling 11 are attached to the outer surface 20 b of the instrument body 20. Therefore, the lighting fixture 10 can be attached to the ceiling 11 by attaching the fixture 24 to the ceiling 11.

As shown in FIGS. 3 and 4, the LED unit 30 has a lens 32 in front of the LED chip 31 that is a light source unit, and is a heat radiating unit that radiates heat generated by the LED chip 31 to the outside. A metal fitting 33 is attached to the front surface (lower surface in FIG. 4) of the first heat conducting plate 41. Therefore, the heat generated by the LED chip 31 is transferred to the first heat conduction plate 41 via the mounting bracket 33. A plurality of (here, for example, four) LED units 30 are linearly arranged and provided in a plurality of rows (here, for example, four rows).
Each LED unit 30 is connected to a power supply unit 25 attached to the inside of the instrument body 20 and supplied with power for lighting.

  As shown in FIGS. 2 to 4, the heat conducting means 40 includes a first heat conducting plate 41 in which the LED unit 30 is disposed and a plurality of second heat conducting members that are in contact with the first heat conducting plate 41. It has the board 42 and the 3rd heat conductive board 43 which contacts the several 2nd heat conductive board 42 in the other side of the 1st heat conductive board 41. As shown in FIG.

  The first heat conductive plate 41 is a flat plate member formed of a thin metal plate (for example, a thin aluminum plate) having a high thermal conductivity, and mounting holes 41c for mounting a plurality of LED units 30 on the front surface. A connection hole 41d for connecting the LED unit 30 and the power supply unit 30 is provided therethrough (see FIG. 3B). The first heat conducting plate 41 is divided into two parts with a gap 41b. For example, four LED units 30 are arranged in each first heat conducting plate 41, for example, in two rows. Both longitudinal edges of each first heat conducting plate 41 are bent rearward at a right angle to provide vertical wall portions 41a. The vertical wall portion 41a of each first heat conduction plate 41 has at least one vertical wall portion 41a on the inner surface of the instrument body 20 when the first heat conduction plate 41 is attached to the interior of the instrument body 20. It is desirable to make contact. Thereby, the heat conduction can be further averaged by dispersing the heat conduction to the instrument body, and heat can be efficiently radiated.

In FIG. 2, the vertical wall portion 41 a is provided along the direction orthogonal to the gap 41 b, but the vertical wall portion 41 a is provided at both ends parallel to the gap 41 b of the first heat conducting plates 41, 41. (Refer to the first heat conduction plate 41 shown in FIG. 7). In this case, since the space | interval of both the vertical wall parts 41a can be expanded by expanding the clearance gap 41b, both the vertical wall parts 41a can be made to contact the inner surface of the instrument main body 20 easily.
A reflection plate 26 having a hole 26a (see FIG. 3A) for exposing the lens 32 forward is provided on the front surface of the first heat conducting plate 41, and the mounting bracket 26b (see FIG. 3B) and It is attached by a screw 26c (see FIG. 3A). The reflection plate 26 can be formed, for example, by painting the surface of a thin aluminum plate white.

  As shown in FIGS. 2 to 5, a plurality of (for example, four) second heat conductive plates 42 are provided behind the first heat conductive plate 41. The second heat conductive plate 42 includes a front plate portion 42a that contacts the rear surface of the first heat conductive plate 41, and a rear plate portion that faces the front plate portion 42a at a predetermined interval and contacts the third heat conductive plate 43. 42b, and a standing plate portion 42c that connects the front plate portion 42a and the rear plate portion 42b.

  An attachment hole 42f is provided through the front plate portion 42a so as to correspond to the attachment hole 41c for attaching the LED unit 30 provided in the first heat conduction plate 41 (FIG. 3C). reference). The rear plate portion 42b is provided with an attachment hole 42g for attaching a connecting plate 44b described later (see FIG. 3D). The standing plate portion 42c connects one end of the front plate portion 42a and one end of the rear plate portion 42b, and the other end of the front plate portion 42a and the other end of the rear plate portion 42b are bent toward each other. A bent portion 42d is provided. Thereby, each 2nd heat conductive plate 42 becomes C-shaped cross section, and the communication space 42e is formed in an inside. The second heat conductive plate 42 can be formed by bending a thin metal plate (for example, a thin aluminum plate) having a high thermal conductivity.

  Each of the second heat conductive plates 42 is disposed so that the standing plate portions 42c are erected in the same direction, that is, in parallel, and is a flat plate made of a thin metal plate (for example, a thin aluminum plate) having a high thermal conductivity. Are connected by a connecting plate 44b. That is, as shown in FIGS. 4A and 4B, the mounting hole 42g of the rear plate portion 42b and the mounting hole 44d of the connecting plate 44b are fastened by a rivet 44a that is a fastening member. Two adjacent second heat conducting plates 42 are fastened to the connecting plate 44b so that the bent portions 42d of the front plate portion 42a and the rear plate portion 42b come into contact with each other, thereby constituting a rectangular box-shaped unit 45. ing. The two units 45 are fastened to the connecting plate 44b with a gap 46 having a predetermined size provided opposite to the upright plate portion 42c of the second heat conduction plate 42 on the center side.

The direction of the communication space 42e of each second heat conduction plate 42, that is, the direction of the standing plate portion 42c is provided in parallel with the gap 41b of the divided first heat conduction plate 41, and the second heat conduction The gap 46 of the plate 42 is provided at the same position as the gap 41 b of the first heat conduction plate 41.
Accordingly, in the second heat conductive plate 42, the front plate portion 42a comes into surface contact with the rear surface of the first heat conductive plate 41, and the rear plate portion 42b comes into surface contact with the connecting plate 44b. The LED unit 30 provided on the first heat conduction plate 41 is disposed along the approximate center of the communication space 42 e of the second heat conduction plate 42.

As shown in FIGS. 2 to 5, a third heat conductive plate 43 is disposed behind the second heat conductive plate 42, that is, behind the connecting plate 44 b. The third heat conducting plate 43 has a flat plate shape large enough to cover the second heat conducting plate 42, that is, the connecting plate 44b. One end of the third heat conducting plate 43 is bent vertically to the second heat conducting plate 42 side. It has the wall part 43a. As shown in FIG. 2, the third heat conducting plate 43 is disposed so as to intersect the direction in which the first heat conducting plate 41 is disposed. That is, the vertical wall portion 43 a of the third heat conductive plate 43 is arranged in a direction orthogonal to the vertical wall portion 41 a of the first heat conductive plate 41.
In addition, in the 3rd heat conductive plate 43 mentioned above, although the vertical wall part 43a was provided only in one edge part, a vertical wall part can also be provided in the other end part which opposes this. In this case, it is desirable that both vertical wall portions 43a are in contact with the inner surface of the instrument body 20.

  Further, as shown in FIG. 4B, in the third heat conduction plate 43, a protrusion is provided at a position corresponding to the rivet 44a that fastens each second heat conduction plate 42 to the connection plate 44b. A hole 43b for receiving a head portion 44c of a rivet 44a is provided. As a result, the connecting plate 44 b can come into surface contact with the third heat conducting plate 43.

Next, the assembly procedure of the lighting fixture 10 will be described.
First, the rear plate portions 42b of the four second heat conducting plates 42 are connected to predetermined positions of the connecting plate 44b with rivets 44a (see FIG. 4). The first heat conducting plate 41 is overlapped on the front surface of the front plate portion 42a of the second heat conducting plate 42, and a plurality of LED units 30 are arranged at predetermined positions on the front surface of the first heat conducting plate 41. The LED unit 30 is attached through the first heat conduction plate 41 and the second heat conduction plate 42 (see FIGS. 3 and 4). Thereby, the 1st heat conductive plate 41 and the 2nd heat conductive plate 42 are integrated. Then, the reflection plate 26 is detachably attached to the front surface of the first heat conduction plate 41 by the mounting bracket 26b.

Next, the third heat conductive plate 43 is arranged on the rear surface of the connecting plate 44 b connecting the second heat conductive plate 42 and attached to the front surface of the bottom plate 20 c of the instrument body 20. At this time, the head portion 44 c of the rivet 44 a fastening the connecting plate 44 b is accommodated in the hole 43 b provided in the third heat conducting plate 43.
Further, the frame 22 to which the cover 23 is attached is attached to the front surface of the instrument body 20.

  As described above, according to the lighting fixture 10 of the first embodiment of the present invention described above, the LED chip 31 of the LED unit 30 that receives power from the power supply unit 25 and emits light from the irradiation opening 21 of the fixture body 20. The heat generated is transmitted from the mounting bracket 33 of the LED unit 30 to the appliance main body 20 via the heat conducting means 40. The heat conduction means 40 includes a first heat conduction plate 41 in which the LED unit 30 is disposed and transfers the heat of the LED chip 31, and a plurality of second heat conduction plates 42 in contact with the first heat conduction plate 41. And the third heat conductive plate 43 in contact with the plurality of second heat conductive plates 42 via the connecting plate 44b on the opposite side of the first heat conductive plate 41, the LED unit 30 The generated heat is transferred to the instrument body 20 via the first heat conduction plate 41, the second heat conduction plate 42, and the third heat conduction plate 43.

  The second heat conductive plate 43 includes a front plate portion 42 a that contacts the first heat conductive plate 41 and a rear plate portion that faces the front plate portion 42 a at a predetermined interval and contacts the third heat conductive plate 43. 42b and the upright plate portion 42c for connecting the front plate portion 42a and the rear plate portion 42b, even if the LED unit 30 is separated from the bottom plate 20c of the instrument body 20, the front plate portion 42a and the rear plate portion 42c are provided. It is possible to average the heat conduction by the plate portion 42b, conduct heat by the standing plate portion 42c, efficiently transfer the heat to the instrument body 20, and avoid the concentration of heat. In addition, since the plurality of second heat conductive plates 42 are arranged so that each of the standing plate portions 42c is erected in the same direction, it is possible to promote heat convection and efficiently dissipate heat. it can.

  Moreover, since the clearance 46 is provided between the standing plate portions 42c of the adjacent second heat conducting plates 42, the convection speed of air due to heat is increased, and the heat dissipation effect can be further enhanced.

  Further, by providing the front plate portion 42a and the rear plate portion 42b with a bent portion 42d, the shape of the front plate portion 42a and the rear plate portion 42b can be reinforced, and the first heat conducting plate 41 and the third plate which are in contact with each other can be strengthened. The thermal conductivity can be improved by improving the contact property with the thermal conductive plate 43.

  Further, since the vertical wall portion 41 a is provided at the edge of the first heat conduction plate 41, the strength of the first heat conduction plate 41 can be increased and the vertical wall portion 41 a is brought into contact with the inner surface of the instrument body 20. Thus, it is possible to increase the thermal conductivity by dispersing in the heat conduction direction.

  Further, the third heat conducting plate 43 is provided with a hole 43b for receiving the head portion 44c of the rivet 44a for attaching the second heat conducting plate 42 to the connecting plate 44b, so that the second heat conducting plate 42 is connected. When the unit 45 is formed, the head 44c of the rivet 44a is received in the hole 43b. For this reason, since the head 44c protrudes and does not get in the way, the 2nd heat conductive plate 42 and the 3rd heat conductive plate 43 can contact in a surface, and can improve thermal conductivity.

  Further, since the arrangement direction of the first heat conduction plate 41 and the arrangement direction of the third heat conduction plate 43 intersect, the vertical wall portion 41a of the first heat conduction plate 41 and the third heat By providing the vertical wall 43a of the conductive plate 43, the strength can be increased. Moreover, when the vertical wall portions 41a and 43a are brought into contact with the inner surface of the instrument main body 20 to transfer heat, a sufficient height can be secured without interference. In addition, the direction of heat convection can be controlled.

Furthermore, the heat of the first heat conducting plate 41 is received by the front plate portion 42a of the second heat conducting plate 42, and the heat received by the front plate portion 42a is received by the upright plate portion 42c and the rear plate portion 42b. In addition, since the rear plate portion 42b transfers heat to the third heat conducting plate 43 via the connecting plate 44b on the surface, heat can be transferred efficiently. Moreover, since it combines using the several 2nd heat conductive board 42, the heat conductive means 40 can be formed easily.
In addition, in the lighting fixture 10 mentioned above, although the case where the four 2nd heat conductive plates 42 were used was demonstrated, as shown in FIG. 6, three 2nd heat conductive plates 42 may be used. it can.

(Second Embodiment)
Next, the lighting fixture of 2nd Embodiment which concerns on this invention is shown in FIG. In addition, the same code | symbol is attached | subjected to the site | part which is common in the lighting fixture 10 concerning 1st Embodiment mentioned above, and the overlapping description is abbreviate | omitted.
As shown in FIGS. 7 and 8, in the luminaire 10 </ b> B of the second embodiment, in the heat conducting means 402, at least one set of the adjacent second heat conducting plates 42 of the upright plate portions 42 c are in contact with each other. In this manner, the second heat conductive plate 42 was disposed. Further, the third heat conducting plate 432 is divided into two parts, and the vertical wall portions 43a are provided on both outer sides.

As mentioned above, according to the lighting fixture 10B of 2nd Embodiment which concerns on this invention demonstrated, since the standing-up board part 42c of the 2nd heat conductive part 42 contacted, via the standing-up board part 42c. Heat can be distributed and transferred, and heat can be transferred efficiently.
In addition, as shown in FIG. 9, the 2nd heat conductive board 421 can also be formed in a rectangular cross section, and can be arrange | positioned so that it may mutually contact.

(Third embodiment)
Next, the lighting fixture of 3rd Embodiment which concerns on this invention is shown in FIG. In addition, the same code | symbol is attached | subjected to the site | part which is common in the lighting fixture 10 concerning 1st Embodiment mentioned above, and the lighting fixture 10B concerning 2nd Embodiment, and the overlapping description is abbreviate | omitted.
As shown in FIG. 10, in the lighting fixture 10C of the third embodiment, the second heat conducting plate 423 of the heat conducting means 403 is not provided with the bent portions 42d in the front plate portion 42a and the rear plate portion 42b, and has a sectional shape. Was made U-shaped. Then, the unit 253 having a rectangular cross section was formed by arranging the end surfaces of the front plate portion 42a and the rear plate portion 42b so as to contact each other.

As described above, according to the lighting fixture 10C of the third embodiment of the present invention described above, in the second heat conductive plate 423, the front plate portions 42a and the rear plate portions 42b face each other so as to contact each other, A cylindrical shape is formed, and it becomes easy to control convection due to heat.
10 shows the case where two units 253 having a cross-sectional shape are provided, but as shown in FIG. 11, the unit 253 should be formed in a cross-sectional shape as a whole. Is also possible.

In addition, the lighting fixture of this invention is not limited to each embodiment mentioned above, A suitable deformation | transformation, improvement, etc. are possible.
For example, in addition to the second heat conductive plates 42 and 423 shown in the above-described embodiments, a cross-sectional shape as shown in FIG. In the second heat conducting plate 424, the standing plate portion 42c is provided from both ends of the rear plate portion 42b, and the front plate portion 42a is provided outside from the tip of each standing plate portion 42c. Even if it does in this way, the same effect | action and effect can be acquired.
Moreover, in each embodiment mentioned above, although the heat-conducting means 40 was formed by the bending process, it can also process by an extrusion molding.

DESCRIPTION OF SYMBOLS 10 Lighting fixture 20 Appliance main body 21 Irradiation opening 25 Power supply unit 30 LED unit 31 LED chip (light source part)
33 Mounting bracket (heat dissipation part)
40 heat conduction means 41 first heat conduction plate 42 second heat conduction plate 42a front plate portion 42b rear plate portion 42c upright plate portion 43 third heat conduction plate

Claims (2)

An instrument body which is attached to the attached portion, has an irradiation opening at the end opposite to the attached portion , and constitutes a rectangular box-shaped outer shell having a space inside ;
An LED unit having a light source section for irradiating light from the irradiation opening, and a heat radiating portion you radiate heat the light source unit is generated to the outside,
A power supply unit that is provided inside the instrument body and supplies power to the LED unit;
A heat conducting means for transferring heat of the heat dissipating part in the LED unit and being provided inside the appliance main body ,
With
The heat conducting means is
On the surface exposed to the irradiation opening, the LED unit is a plurality, disposed are Rutotomoni, a first heat conductive plate you heat transfer heat from the heat radiating portion in the LED unit,
A second heat conducting plate in direct or indirect contact with the first heat conducting plate;
The opposite side of the first heat conduction plate, and the third heat conductive plate which directly or indirectly contacts the front Stories second heat conducting plate,
Have
The first heat conduction plate has a first vertical wall portion whose surface contacts the inner surface of the instrument body,
The second heat conductive plate is in contact with each of the first heat conductive plate and the third heat conductive plate directly or indirectly on the surface, and communicates with the inside in a predetermined direction. Have space,
The third heat conductive plate, the surface is in contact with the inner surface of the instrument body, wherein the first vertical wall portion that have a second vertical wall portion which is provided without interfering,
A lighting apparatus characterized by that. The second heat conducting plate is
A front plate portion that directly or indirectly contacts the first heat conducting plate and extends in a predetermined direction;
A rear plate portion facing the front plate portion at a predetermined interval and extending in the predetermined direction, and in contact with the third heat conducting plate directly or indirectly on the surface ;
The front and connected to the plate portion and the rear plate portion erected, have a, and upright plate portion extending in the predetermined direction,
The communication space communicating with the predetermined direction is formed inside the front plate portion, the rear plate portion, and the standing plate portion,
A plurality of the second heat conductive plates are provided,
Each of the plurality of second heat conductive plates is disposed in the predetermined direction,
And, between two adjacent of said standing up plate portion that provided a gap,
The lighting fixture according to claim 1.

Images