JP2020115470A - Luminaire - Google Patents

Abstract

To improve heat dissipation efficiency of a luminaire and improve workability and design.SOLUTION: In a luminaire, a heat dissipation part 200 comprises a board fitting surface 201 fitted with a light source, and at least two heat dissipation fins 211 provided on a side of a back surface 201c of the board fitting surface. A power insertion hole 220 which is provided between the two heat dissipation fins 211 and into which a power line connected to the light source is inserted is formed. The luminaire comprises an arm part which is formed into an approximate U-shape and fitted in such a manner that end parts sandwich the heat dissipation fins 211.SELECTED DRAWING: Figure 5

Description

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

2. Description of the Related Art In recent years, spotlight type lighting fixtures that illuminate light in an arbitrary direction often use a light emitting element such as an LED as a light source.
This spotlight type lighting fixture illuminates a predetermined object brightly, and is installed indoors, so that designability may be required.
Therefore, there are many devices provided with a heat dissipation mechanism for efficiently lighting the light emitting element and an exterior member in consideration of design.

For example, in the luminaire described in Patent Document 1, the luminaire main body is held by a U-shaped bracket so as to be rotatable by a predetermined angle. The main body of the luminaire includes a board on which the light emitting element is mounted, a heat radiating section which has a mounting surface on which the back surface of the board (the surface opposite to the light emitting element) is in contact and mounted, and which radiates heat from the board, and has a bottomed substantially cylindrical shape. It has a shape and a heat dissipation groove is formed, and it is equipped with an exterior part that is attached so as to cover the heat dissipation part. The exterior part secures (improves) the design and dust accumulates in the heat dissipation part, and It prevents it from becoming an obstacle.

Further, the luminaire described in Patent Document 2 has a substrate on which a light emitting element is mounted as in the luminaire of Patent Document 1, a mounting surface on which the substrate is mounted and a mounting surface back surface (opposite to the surface on which the substrate is mounted). The luminaire main body is composed of a heat radiating portion having a heat radiating fin formed so as to project from the surface) and an exterior portion covering the heat radiating portion.
The exterior part of the main body of the luminaire of Patent Document 2 has an opening formed on the side surface of the heat dissipation part opposite to the light emitting element and on the side surface of the exterior part facing upward when rotated by a predetermined angle. By providing the part, the air circulation inside the exterior part is promoted.

Further, the luminaire described in Patent Document 3 has a plurality of heat radiation fins formed in the vertical direction so that the heat radiation portion has a width substantially the same as the width of the mounting surface from the surface opposite to the mounting surface on which the substrate is mounted. The plurality of heat radiation fins are arranged substantially in parallel. Further, a cover provided with a bracket for indicating the lighting equipment from the board side is attached so as to cover the board.
In the luminaire of Patent Document 3, since the radiation fins of the heat radiation portion are formed to have a large radiation area and the exterior portion covers only the root direction of the radiation fins, heat radiation from the radiation fins is not prevented, It radiates heat efficiently.

JP, 2006-294526, A JP, 2014-049347, A JP, 2011-154832, A JP, 2014-044900, A JP 2012-048996 A

However, in the luminaire of Patent Document 1, although the exterior portion has a groove hole for heat dissipation, the parts other than the groove hole are closed and air is not circulated inside the exterior portion, and the heat dissipation is efficient. There is a problem that you cannot do it.

Further, in the lighting device described in Patent Document 2, dust and the like are accumulated inside the exterior part through the opening formed on the side surface of the exterior part. Therefore, it is necessary to perform maintenance such as cleaning in order to maintain efficient heat dissipation performance.
However, when cleaning the heat dissipation part, the exterior part is removed from the luminaire main body after removing the luminaire main body from the bracket, which causes a problem that maintenance work becomes complicated.

Further, the luminaire described in Patent Document 3 has a radiating fin having substantially the same width as the mounting surface, but the radiating portion is formed by aluminum casting that has a heat radiating property such as aluminum.
When forming a radiating fin that is plate-shaped and has a large radiating area, the plate thickness tends to be large, and it may be weighted or increased in size, and there is a problem in that it has an impact on cost and design. ..

Further, in common with the lighting fixtures of Patent Document 1 to Patent Document 3, it is necessary to radiate heat while the surface opposite to the mounting surface on which the substrate is mounted is heated to a high temperature due to the heat generated by the light emitting element. However, the lighting fixtures of Patent Documents 1 to 3 have a problem in that the vicinity of the base of the heat radiation fin is covered with the exterior part, so that the air circulation to the back surface of the substrate mounting cannot be performed efficiently.

An object of the present invention is, for example, to improve heat dissipation efficiency and workability and design.

A lighting fixture according to the present invention includes a board mounting surface on which a light source is mounted, and at least two heat radiation fins provided on the back surface side of the board mounting surface, and the lighting equipment is provided between the two heat radiation fins. A power supply insertion hole into which a power supply line connected to the light source is inserted is formed.

According to the lighting fixture of the present invention, it is possible to improve heat dissipation efficiency and workability and design.

FIG. 3 is a perspective view of the lighting fixture according to the first embodiment. FIG. 3 is a lateral side view of the lighting fixture according to the first embodiment. FIG. 3 is an exploded perspective view of a lighting fixture main body portion of the lighting fixture according to the first embodiment. 3A and 3B are development views of the heat dissipation portion of the lighting fixture according to the first embodiment, where FIG. 7A is a side view of the heat dissipation portion, and FIG. It is a figure. FIG. 5 is a cross-sectional view taken along the line AA shown in FIG. 4B of the heat dissipation unit according to the first embodiment. FIG. 3 is a perspective view of an exterior part according to the first embodiment. FIG. 3 is an exploded side view of the lighting fixture according to the first embodiment. FIG. 3 is an exploded perspective view of the lighting fixture according to Embodiment 1 from a rear viewpoint (as viewed from above the heat dissipation part). It is a figure which shows movable operation|movement (a)-(c) with respect to the arm part of the illuminating device main part which concerns on Embodiment 1. It is a figure which shows the variation (a)-(c) of the partition surface in the heat dissipation part which concerns on Embodiment 1. FIG. 6 is a diagram showing a modified example of the heat dissipation unit according to the first embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below. Further, in the following drawings, the size relationship of each component may be different from the actual one. Further, in the description of the embodiments, the directions and positions such as “upper”, “lower”, “left”, “right”, “front”, “rear”, “front”, “back” are indicated. For convenience of explanation, those notations are only described as such, and do not limit the arrangement, orientation, etc. of devices, instruments, parts and the like.

Embodiment 1.
FIG. 1 is a perspective view of a lighting fixture 1 according to this embodiment. FIG. 2 is a lateral side view of the lighting fixture 1 according to the present embodiment. FIG. 3 is an exploded perspective view of the lighting fixture main body 100 of the lighting fixture 1 according to the present embodiment. FIG. 4 is a development view of the heat radiating portion 200 of the lighting device 1 according to the present embodiment, (a) is a side view of the heat radiating portion 200, and (b) is the heat radiating portion 200 and the heat radiating fin portion 210 is formed. It is the figure seen from the side (Z direction side). FIG. 5 is a cross-sectional view of the heat dissipation portion 200 according to the present embodiment taken along the line AA shown in FIG.

The overall configuration of the lighting fixture 1 according to the present embodiment will be described with reference to FIGS. 1 to 5.
In the present embodiment, a spotlight type lighting fixture that is used by being fitted in a lighting duct or the like will be described as an example of the lighting fixture 1.

The lighting fixture 1 is fixed to a power supply block 10 that fits in a lighting duct (not shown), and is fixed to the lower surface side of the power supply block 10 (the side opposite to the lighting duct), and is rotated by a predetermined angle in the horizontal direction around the fixed portion as an axis. The holding unit 20 is formed in a U-shape, and the lighting fixture main body 100 is fixed to the inside of the U-shape of the holding unit 20.
The luminaire main body 100 rotates in a vertical direction (downward) by a predetermined angle about a portion fixed to the holding portion 20 (see FIG. 9 and the like).

As shown in FIGS. 1 to 3, the lighting apparatus main body 100 includes a light emitting substrate 110 in which a light emitting element 111 such as an LED is mounted on a substrate 112, and a light distribution cover arranged in front of the light emitting substrate 110. The portion 120, the heat radiation portion 200 to which the light emitting substrate portion 110 is attached and which radiates the heat generated from the light emitting substrate portion 110, and the exterior portion 130 which covers a part of the heat radiation portion 200 are provided.

As shown in FIG. 1, the holding portion 20 includes a pair of arm portions 21. The holding part 20 includes a fixing part provided at each end of the pair of arm parts 21, and the side part of the heat radiating part 200 is rotatably held by the fixing part. The fixing portion is composed of a hole formed at the end of the arm portion 21 and a screw which is inserted into the hole and fixes the arm portion 21 and the heat radiating portion 200.
In addition, the fixing portion may not be formed of the hole of the arm portion 21 and the screw. For example, the pair of arm portions 21 may have protrusions protruding inward from their respective end portions, and the protrusions may hold the heat dissipation portion 200 rotatably. Further, the heat radiating portion 200 includes a protrusion protruding from a position corresponding to the fixed portion in the heat radiating portion 200, and the heat radiating portion 200 is rotatable by engaging the protrusion and the hole formed in the arm portion 21. It may be configured to be held by the arm portion 21.

Further, as shown in FIG. 2, the heat radiating portion 200 is held by the holding portion 20, and screws inserted into the respective end portions of the pair of arm portions 21, that is, the respective ones of the pair of arm portions 21. It rotates in the vertical direction with the straight line connecting the fixed parts as the axis 25.
In addition, the holding part 20 only needs to have the arm part 21 that rotatably fixes the heat radiating part 200, and need not have a U-shape. For example, the holding portion 20 may have a U shape, a V shape, an I shape, an L shape, or the like.
The L-shaped holding portion 20 is, for example, a pair of arm portions 21 formed in an L shape in the left-right direction from a holding portion fixing portion (see FIG. 1) where the holding portion 20 is fixed to the power supply block 10. Of these, only one of the arm portions 21 holds the heat radiation portion 200.
The I-shaped holding portion 20 is, for example, formed in an I-shape (bar shape) from the holding portion fixing portion (see FIG. 1) where the holding portion 20 is fixed to the power supply block 10 toward the heat radiation portion 200. The arm portion 21 holds the heat dissipation portion 200. The I-shaped holding unit 20 has one end fixed to the power supply block 10 and the other end rotatably holding the heat radiating unit 200 between adjacent heat radiating fins 210 of the heat radiating unit 200. ..

In the light emitting substrate 110, a plurality of light emitting elements 111 such as LEDs are mounted on a disc-shaped substrate 112 arranged radially at substantially equal intervals.
Further, in the light emitting substrate section 110, the surface opposite to the surface on which the light emitting element 111 is mounted (the substrate section front surface 110b) (the substrate section back surface 110a) is in contact with and fixed to the heat dissipation section 200.

The light distribution cover part 120 is formed by molding a member such as a resin having transparency into a bottomed cylindrical shape, and is held by the heat dissipation part 200 so as to cover the substrate part surface 110b of the light emitting substrate part 110.
Further, the light distribution cover unit 120 is provided with a light distribution lens (not shown) having a substantially semicircular shape on the surface facing the light emitting substrate unit 110 so as to face the light emitting element 111.

The shape of the light emitting substrate 110 does not have to be circular. This embodiment can be applied to an elliptical shape, a rectangular shape, a polygonal shape, an irregular shape, or the like.

The heat dissipation part 200 is formed by molding a material having heat dissipation performance such as aluminum. The heat radiating section 200 includes a board mounting surface 201 to which the light emitting board section 110 is mounted, and a plurality of heat radiating fin sections 210 formed on the surface opposite to the board mounting surface 201 (board mounting back surface 201b) (see FIG. 2). There is.

The board mounting surface 201 has a substantially circular shape, and the light emitting board section 110 is mounted thereto.
As shown in FIGS. 3 and 5, the board mounting surface 201 has mounting side portions 201a formed substantially perpendicular to the light emitting element irradiation direction side from the substantially circular peripheral portion, and inside the mounting side portions 201a. The light distribution cover portion 120 is held by. Further, a decorative portion 202 (or a front heat radiation portion) is formed on the outer periphery of the mounting side portion 201a.
Further, the board mounting surface 201 is formed with a power supply insertion hole 220 for connecting the light emitting board section 110 to a power supply line (not shown) for receiving power supply from the power supply block 10.

The decorative portion 202 is formed in a wide-angle direction (a direction that spreads outward) from the substantially circular peripheral portion of the board mounting surface 201 in the irradiation direction, and is arranged on the outer periphery of the mounting side portion 201a as shown in FIG. It is set up.
Further, the decorative portion 202 radiates the heat from the light emitting substrate portion 110 fixed to the substrate mounting surface 201 together with the radiation fin portion 210 described later.

As shown in FIGS. 4 and 5, the surface of the board mounting surface 201 opposite to the surface on which the light emitting board section 110 is mounted is referred to as a board mounting back surface 201b. A plurality of heat radiation fins 210 are formed on the board mounting back surface 201b so as to stand on the board mounting back surface 201b.
The heat dissipation fin section 210 includes two adjacent heat dissipation fins 211 and a fin connection section 212 that connects the two adjacent heat dissipation fins 211.
As shown in FIG. 4B, the radiating fin portion 210 has the radiating fins 211 adjacent to the radiating fins 211 that are radially arranged so as to form the open portion 201c at the center of the substrate mounting back surface 201b. The two are connected by the fin connecting portion 212 to be integrally formed.
Therefore, in this embodiment, 12 radiating fins 211 are provided and 6 radiating fins 210 are provided.

As shown in FIG. 5, the radiating fin 211 has a substantially trapezoidal plate shape, the inner side surface thereof rises substantially vertically from the board mounting back surface 201b, and the outer side surface 211a is gradually inclined inward from the board mounting back surface 201b. Are formed. The upper surface of the heat dissipation fin 211 is gradually inclined toward the board mounting back surface 201b toward the center of the board mounting back surface 201b. The inclination of the outer surface 211a of the heat radiation fin is formed at substantially the same inclination angle as the inclination of the outer peripheral surface 202a of the decorative portion 202.

As shown in FIG. 4A, in the heat dissipation part 200, the direction opposite to the irradiation direction of the light emitting element, that is, the direction of the tip of the heat dissipation fin 211 is defined as the upward direction of the heat dissipation part.
The radiating fins 211 are formed so that the plate thickness gradually decreases as it goes upward in the radiating portion. That is, the radiating fin 211 is gradually thinned from the board mounting back surface 201b side to the tip.

Since the radiating fin 211 has a large plate thickness in the vicinity of the board mounting back surface 201b where the temperature becomes high, the thermal resistance becomes small. In addition, the heat radiation fin 211 gradually decreases in plate thickness as it goes upward in the heat radiation portion where the temperature is suppressed by the heat radiation effect, so that the thermal resistance gradually increases.
As described above, according to the heat dissipation fin 211 according to the present embodiment, a plate (having a thermal resistance) that considers the heat dissipation temperature required by the site of the heat dissipation fin 211 rather than having a uniform thickness of the heat dissipation fin 211. Since it is thick, the weight can be reduced. Therefore, the manufacturing cost can be reduced.
The radiating fin 211 has a shape in which the plate thickness becomes thinner (continuously) as it goes upward, and the die can be easily pulled upward by casting or die-casting. Is.
The shape of the heat radiation fin does not have to be gradually thin, and may be gradually thin.

The fin connection part 212 connects two adjacent heat radiation fins 211 protruding from the board mounting back surface 201b. The fin connection part 212 connects the two heat radiation fins 211 by filling the board attachment back surface 201b side between adjacent heat radiation fins 211 and the board attachment back surface 201b central portion side. The fin connecting portion 212 is formed in a columnar shape on the board mounting back surface 201b side between the adjacent heat radiation fins 211 and on the center side of the board mounting back surface 201b.

The fin connecting portion 212 is arranged on the central portion side (the central open portion 201c side) of the board mounting back surface 201b of the heat radiation fin 211. Further, the height from the board mounting back surface 201b of the fin connection portion 212 to the tip is formed shorter than the height from the board mounting back surface 201b of the heat radiation fin 211 to the tip of the heat radiation fin 211. Therefore, a radiating fin tip concave portion 210a having a concave shape is formed at the tip of the radiating fin portion 210 (see FIG. 4).
The radiating fin tip concave portion 210a improves the designability when the radiating portion 200 is viewed from above the radiating portion (FIG. 4B).

The upper surface of the fin connecting portion 212 in the upward direction of the heat radiating portion becomes a boss portion (base portion) of the push pin when the heat radiating portion 200 is pushed out from the mold. Therefore, the difference between the upper surface of the fin connecting portion 212 and the tip of the heat radiating fin 211 (the recess width of the heat radiating fin tip recess 210a) is set to such a length that the push pin reaches the upper surface of the fin connecting portion 212.
Further, the size of the upper surface of the fin connecting part 212 is such that it functions as a boss part of the push pin. The size of the upper surface of the fin connecting portion 212 is determined by, for example, the diameter of the tip surface of the push pin. The size of the upper surface of the fin connecting portion 212 where the exterior fixing hole 214 is formed is such that the wall thickness around the exterior fixing hole 214 does not become too thin so that the exterior fixing hole 214 functions as a fixing hole. Make it spacious.

Further, the fin connecting portion 212 has a reinforcing effect on the heat radiation fin 211, and when the heat radiation portion 200 is cast and molded from aluminum or the like, it functions as a receiving portion and a boss for the molding die, and pressurizes at the time of molding. The heat radiation fin 211 is reinforced against the heat radiation fin.

The fin connecting portion 212 may be reduced depending on the molding shape, but if the fin connecting portion 212 is not provided, it is necessary to maintain the strength by the shape of the radiation fin itself, and the width is increased and the plate thickness is increased. It is necessary to consider design and cost.
Further, in the present embodiment, the radiating fin portion 210 includes two radiating fins 211 and a fin connecting portion 212 that connects the two radiating fins 211, but the radiating fins 211 that are connected by the fin connecting portion 212. Does not have to be two. For example, three or four radiating fins 211 may be connected.
Further, since the push-out pin pushes the fin connecting portion when the push-out pin is taken out from the mold, it is not necessary to separately provide a boss for the push-out pin, and the design is improved.

The radiating fin portion 210 is composed of two radiating fins 211 and a fin connecting portion 212, but a notch or the like is formed depending on the location of the board mounting back surface 201b.
For example, as shown in FIG. 4B, an arm connecting portion 213 having an arm connecting hole 213a connecting to the arm portion 21 is formed between the heat radiating fin portion 210 and the heat radiating fin portion 210. A part of the radiating fin 211 adjacent to the arm coupling portion 213 in the downward direction (Y-axis downward direction in FIGS. 4A and 4B) is cut so that the lighting device main body 100 can rotate by a predetermined angle. A notch 2131 is formed.

In addition, an exterior fixing hole 214 (exterior fixing portion) for fixing the exterior portion 130 is formed at the tips of the pair of fin coupling portions 212 located in the center in the X-axis direction in FIG. 4B. A second protrusion 135 (see FIG. 6) of the exterior portion 130 described later is brought into contact with the exterior fixing hole 214, and the exterior portion 130 is attached by a screw 1302 (see FIGS. 7 and 8).

In addition, in the radiation fins 211 of the two radiation fin portions 210 arranged in the Y-axis downward direction in FIGS. 4A and 4B, the first projection portion 134 of the exterior portion 130 described later (see FIG. 6). The exterior mounting notch 215 and the exterior insertion hole 216 for engaging with each other are formed.

In addition, a gap 218 is formed between the adjacent radiation fin portions 210 and the radiation fin portions 210. The space 218 is formed so as to be narrower on the substrate mounting back surface 201b side and wider toward the upper side of the heat dissipation portion in accordance with the change in the plate thickness of the heat dissipation fin 211, so that effective air circulation can be performed. There is.

FIG. 6 is a perspective view of exterior part 130 according to the present embodiment. FIG. 7 is an exploded side view of lighting fixture 1 according to the present embodiment. FIG. 8 is an exploded perspective view of the lighting fixture 1 according to the present embodiment from a rear viewpoint (as viewed from above the heat radiating portion). FIG. 9 is a diagram showing movable operations (a) to (c) with respect to the arm portion 21 of the lighting fixture main body 100 according to the present embodiment. FIG. 10 is a diagram showing variations (a) to (c) of the partition surface 1301 in the heat dissipation unit 200 according to the present embodiment. FIG. 11: is a figure which shows the modification of the heat dissipation part 200 which concerns on this Embodiment.

The exterior part 130 shown in FIG. 6 covers a part of the heat dissipation fin part 210.
As shown in FIG. 7, the heat radiating unit 200 rotates in the up-down direction with the line connecting the arm connecting holes 213a (the fixed portion of the arm unit 21) as the axis 25. At this time, a surface including the shaft 25 and substantially orthogonal to the board mounting back surface 201b is defined as a partition surface 1301. The partition surface 1301 is a surface that is virtually set. The exterior part 130 is attached to the radiating fin part 210 so as to cover the part of the radiating fin part 210 provided on the radiating part 200, which is the outside when the radiating part 200 rotates.
As shown in FIG. 9, the radiating fin portion 210 covered by the exterior portion 130 has the luminaire main body portion 100 (heat radiating portion 200) fixed to the holding portion 20 and the arm connecting hole 213a as the axis 25 from FIG. 9(a). The radiation fin portion 210 is located outside the partition surface 1301 when rotated to FIG. 9B.

As shown in FIG. 6, the exterior part 130 has a substantially semi-cylindrical shape with both ends open. In the exterior part 130, a rear arc part 132 which is an end part on the heat dissipation part upper side is formed smaller than a front arc part 131 which is an end part on the irradiation direction side. The front arc part 131 is a peripheral part of the exterior part 130 that forms an opening 137 on the irradiation direction side.
The exterior part 130 is formed such that the circle centers of the front arc part 131 and the rear arc part 132 are coaxial. The side surface of the exterior portion 130 is formed with an inclined side surface portion 133 so as to correspond to the inclination of the outer side surface 211a (see FIG. 5) of the heat dissipation fin 211.

The inclined side surface portion 133 has side surface convex portions 133a and 133b formed on the inner side surface (inner wall 133c) on the front arc portion 131 side. A first protrusion 134 is disposed on the side surface convex portion 133a so as to protrude from the front arc portion 131.
Further, the inclined side surface portion 133 is formed with a second protrusion 135 (engagement portion) protruding from the inner side surface (inner wall 133c) on the rear arc portion 132 side in a substantially circular center direction. The second protrusion 135 is provided with a fixing hole 135a that penetrates the exterior part 130 in a substantially semi-cylindrical shape in the axial direction.

The first projection portion 134 and the second projection portion 135 may be formed integrally with the inclined side surface portion 133 or may be combined separately.
Further, in place of the exterior insertion hole 216 of the heat dissipation portion 200, a first protrusion 134″ (not shown) corresponding to the first protrusion 134 is formed, and the first protrusion 134″ is formed on the side surface convex portion 133a side. An insertion hole for inserting (not shown) may be provided.
It should be noted that the first protrusion 134′ (not shown) formed as a separate body is previously fixed to the exterior insertion hole 216 (see FIG. 4) of the heat dissipation unit 200, and is attached to the exterior projection insertion hole 216 on the side surface convex portion 133a side. An insertion hole for inserting the inserted first protrusion 134′ (not shown) may be provided.

In the exterior part 130, the front circular arc portion 131 and the rear circular arc portion 132 are arranged so that the centers of the circles are coaxial with each other, but the circumferential angle is formed larger on the rear circular arc portion 132 side than on the front circular arc portion 131 side. ing. Therefore, the rear arc portion 132 side of the exterior portion 130 covers more heat radiation fin portions 210 than the front arc portion 131 side.

Further, the inclined side surface portion 133 is formed with an arm notch 136. The arm notch 136 (notch) is a notch formed so that the exterior part 130 does not interfere with the arm part 21 when the lighting device main body 100 is rotatably attached to the holding part 20.

Next, a method of attaching the exterior part 130 to the heat dissipation part 200 will be described with reference to FIGS. 7 and 8.
First, the exterior part 130 is inserted into the heat dissipation part 200 in the direction of the arrow shown in FIG. 7. At this time, the first protrusion 134 is inserted into the exterior insertion hole 216.
In addition, the second protrusion 135 (engagement portion) is fitted into the heat radiation fin tip recess 210 a of the heat radiation fin portion 210 having the exterior fixing hole 214 (exterior fixing portion). The second protrusion 135 (engagement portion) engages with the exterior fixing hole 214 (exterior fixing portion). The second protrusion 135 is disposed coaxially with the exterior fixing hole 214, and the second protrusion 135 is fixed to the fin connecting portion 212 having the exterior fixing hole 214 by screwing means such as a screw 1302. Thereby, the exterior part 130 is fixed to the heat dissipation part 200. The method for engaging the second protrusion 135 and the exterior fixing hole 214 may be a method other than screwing, for example, a fitting structure.

When the first protrusion 134 of the exterior portion 130 is inserted into the exterior insertion hole 216, the side surface protrusion 133a contacts the bottom of the exterior attachment cutout 215 (the surface portion where the exterior insertion hole 216 is formed). .. As shown in FIG. 7, the exterior insertion hole 216 is formed at a position displaced from the substrate mounting rear surface 201b toward the tip (upward direction of the heat dissipation portion) by a predetermined width (L1). Therefore, a gap 101 (see FIG. 2) having a predetermined width (L1) is formed between the front arc portion 131 of the exterior portion 130 and the board mounting back surface 201b. In other words, the exterior mounting notch 215 is provided so that the gap 101 having a predetermined width is formed between the front arc portion 131 and the board mounting back surface 201b.

The exterior part 130 is inserted from the rear of the luminaire main body part 100 by the first connection part by the first projection part 134 and the exterior insertion hole 216 and the second connection part by the second projection part 135 and the exterior fixation hole 214. It can be fixed by inserting it, and can be easily attached and detached even when the lighting fixture main body 100 is connected to the holding portion 20.
Further, since the exterior part 130 has the arm notch 136, when the lighting fixture body part 100 rotates in a predetermined direction, the exterior part 130 and the arm part 21 can rotate without interfering with each other. You can

As shown in FIGS. 7 and 9, the exterior part 130 includes the shaft 25 passing through the arm coupling hole 213a and a surface substantially orthogonal to the board mounting back surface 201b as a partition surface 1301. It is attached so as to cover the heat radiation portion 200 located outside from the partition surface 1301 when it is fixed around the shaft 25 and rotated about the shaft 25.

The lighting fixture body 100 rotates from (a) in FIG. 9 to (c) in FIG.
FIG. 9A shows a state in which the light emitting element is irradiated in a substantially horizontal direction, and this state is referred to as a first state of the heat dissipation unit 200. Further, FIG. 9C shows a state in which the irradiation direction of the light emitting element is substantially downward, and this state is referred to as a second state of the heat dissipation unit 200.
The heat dissipating fin portion 210 located outside the partition surface 1301 is a heat dissipating fin portion of the plurality of heat dissipating fin portions 210 that does not allow the arm portion 21 to pass near the outer surface 211a when the lighting fixture body 100 rotates. 210 (radiation fin 211). Therefore, in some cases, one of the two heat dissipating fins 211 of the heat dissipating fin part 210 is covered by the exterior part 130 and the other is not covered by the outer exterior part 130.

Since the exterior part 130 covers the heat dissipation fins 211 located outside the partition surface 1301, the lighting fixture 1 emits light in a predetermined direction (for example, (a) or (b) of FIG. 9). At times, it becomes difficult to see the power lines from below. Further, the decorative portion 202 and the inclined side surface portion 133 are formed so that their inclinations are substantially on the same straight line (see FIG. 9A). Therefore, the design of the lighting fixture 1 is improved.
Note that, as shown in FIG. 9A, the outer peripheral surface 202a of the decorative portion 202 and the inclined side surface portion 133 of the exterior portion 130 are formed so as to be in a straight line, but a smooth curve is not required to be a straight line. You may form so that it may become a shape. That is, the outer peripheral surface 202a of the decorative portion 202 and the inclined side surface portion 133 of the exterior portion 130 are formed as a whole as if they were one continuous smooth curved surface (a substantially continuous curved surface, a substantially flush shape). By forming the decorative portion 202 and the exterior portion 130 in this manner, the design is improved.

FIG. 10 is a diagram showing variations (a) to (c) of the partition surface 1301 according to this embodiment.
As described above, FIG. 10A shows the partition surface 1301 that includes the shaft 25 and is substantially orthogonal to the board mounting back surface 201b. A portion R1 of the radiation fin portion 210 covered by the diagonal line indicates the radiation fin portion 210 positioned outside the partition surface 1301.
FIG. 10B shows a partition surface 1301a that includes the shaft 25 and that intersects the board mounting back surface 201b so as to incline outward. According to the partition surface 1301a shown in FIG. 10(b), the portion R2 covering the heat dissipation fin portion 210 is narrower than R1 in FIG. 10(a), so that the exterior portion 130 can be downsized and the design can be improved. The manufacturing cost can be reduced while maintaining the property.
FIG. 10C shows a partition surface 1301b that includes the shaft 25 and that intersects the board mounting back surface 201b so as to incline inward. According to the partition surface 1301b shown in (c) of FIG. 10, the portion R3 that covers the heat dissipation fin portion 210 is wider than R1 of (a) of FIG. 10 and covers more heat dissipation fin portion 210, so that the designability is improved. Will be improved.

Next, the heat dissipation effect will be described.
The heat radiating unit 200 radiates heat generated by lighting the light emitting substrate unit 110 on the substrate mounting surface 201 by the heat radiating fin unit 210.
The radiating fins 211 of the radiating fin portion 210 are formed such that the thickness of the radiating fins 211 is thicker on the substrate mounting back surface 201b side and becomes thinner toward the upper portion of the radiating portion (the direction opposite to the irradiation direction of the light emitting element). The back surface 201b has a small thermal resistance (because the plate thickness is thick), and the thermal resistance increases as it goes upward in the heat radiating portion where the temperature is suppressed by the heat radiating effect.

Further, in the heat radiating portion 200, the heat radiating fin portion 210 is arranged so as to provide a gap 218 between the heat radiating fin portion 210 and the adjacent heat radiating fin portion 210, and the front arc portion 131 of the exterior portion 130 and the board mounting back surface 201b are arranged. A gap 101 (see FIG. 2) is formed between them. The void 218 and the gap 101 are in communication with each other. Therefore, the air circulation around the substrate mounting back surface 201b, which is predicted to reach the highest temperature, is promoted to improve the heat dissipation effect.

In addition, since the gap 101 is provided, dust and the like inside the heat radiating portion 200 can easily escape, so that the air circulation and heat radiating ability of the heat radiating portion 200 are less likely to decrease due to the accumulation of dust and the like. ing.

In the present embodiment, the heat dissipation portion 200 has a heat dissipation fin 211 formed such that the plate thickness is thicker on the substrate mounting back surface 201b side and becomes thinner toward the top of the heat dissipation portion (the direction opposite to the irradiation direction of the light emitting element 111). The two adjacent heat radiation fins 211 are integrally formed by the fin connecting portion 212.
Due to such an inclination that the plate thickness becomes thin in the upward direction of the heat radiating portion, when the heat radiating portion 200 is molded by aluminum casting (or injection molding), the molding die is pulled upward in the heat radiating portion (the direction opposite to the light emitting substrate). In addition to being easy, the fin coupling portion 212 fulfills the reinforcing effect of the heat radiation fin 211 at the time of molding, and the heat radiation portion 200 can be easily molded.
Further, since the heat radiation fin 211 is formed integrally with the fin connecting portion 212, the plate thickness can be made smaller than that formed by using the heat radiation fin 211 alone. Further, by reducing the plate thickness, it is possible to increase the number of radiating fins 210 provided, and it is possible to further enhance the heat radiating effect.

In the present embodiment, the exterior part 130 includes the first connection part formed by the first protrusion part 134 and the exterior insertion hole 216, and the second connection part formed by the second protrusion part 135 and the exterior fixation hole 214. It can be fixed by inserting it from the rear of the main body 100, and can be attached and detached even if the lighting equipment main body 100 is connected to the arm 21.
Therefore, it is possible to eliminate the restriction on the order of assembling the products, which facilitates the assembling work. Further, the exterior part 130 can be easily attached and detached even during maintenance such as cleaning.

In the present embodiment, the heat dissipation part 200 is formed such that the heat dissipation fin 211 has a large plate pressure on the substrate mounting back surface 201b side and becomes thinner as it goes upward (direction opposite to the irradiation direction of the light emitting element). The board mounting back surface 201b is formed to have a small thermal resistance, the adjacent heat radiation fins 210 are provided with a gap, and the gap 101 is formed between the exterior part 130 and the board mounting back surface 201b. By doing so, the air circulation around the board mounting back surface 201b is efficiently performed.

FIG. 11 is a diagram showing modified examples (a) and (b) of the heat dissipation unit 200 in the present embodiment.
In the present embodiment, the arrangement of each part on the board mounting back surface 201b has been described with reference to FIG. 4B. However, as shown in FIG. 11A, the inside of the heat dissipation fin part 210′ (two heat dissipation fins 211′ are illustrated. The arm connecting part 213′ may be disposed between the two). The arm connecting portion 213′ is formed on the outer surface of the fin connecting portion 212′ that connects the two radiating fins 211′. The exterior fixing hole 214 is formed on the upper end surface of the fin connecting portion 212'.
With the configuration as shown in FIG. 11A, a void 218a is formed in the portion that was the arm connecting portion 213 in FIG. 4B. Therefore, the number of air inlets to the board mounting back surface 201b can be increased, and heat dissipation efficiency can be improved.

In addition, as shown in FIG. 11B, the power supply insertion hole 220 ′ may be arranged on the lower side of the Y axis, and the power supply line (not shown) may be connected to the fin connection part 212 or the heat dissipation fin tip of the heat dissipation fin part 210. It may be fixed to the concave portion 210a and used as a supporting portion of the power supply line when it is movable.

In the present embodiment, the following lighting equipment has been described.
The luminaire according to the present embodiment has an arm portion and a luminaire main body portion rotatably attached to the arm portion. The luminaire main body part has a light emitting substrate on which a light emitting element is mounted attached to the front surface, and is radially arranged on the back surface in a direction from a central portion of the back surface toward an edge portion of the back surface and emitted from the light emitting element. The heat radiation part is provided with a plurality of heat radiation fin parts that radiate heat. The heat dissipating portion includes an open portion that is opened from a gap formed between two adjacent heat dissipating fin portions of the plurality of heat dissipating fin portions to a central portion of the back surface, and the two adjoining heat dissipating fins. And a power supply insertion hole formed between the parts and on the back surface for inserting the power supply line.

In the heat dissipation part, the heat dissipation fin parts of the plurality of heat dissipation fin parts are arranged apart from each other.

Each radiating fin portion of the plurality of radiating fin portions includes a plate-shaped fin whose plate thickness gradually decreases from the back surface to the tip.

Although the embodiment of the invention has been described above, the embodiment may be partially implemented. Alternatively, two or more parts of this embodiment may be combined and implemented. The present invention is not limited to this embodiment, and various modifications can be made if necessary.

1 Lighting Fixture, 10 Power Supply Block, 20 Holding Part, 21 Arm Part, 25 Axis, 100 Lighting Fixture Main Part, 101 Gap Part, 110 Light Emitting Substrate Part, 110a Back Part of Back Part, 110b Substrate Part Surface, 111 Light Emitting Element, 112 Substrate Part, 120 light distribution cover part, 130 exterior part, 131 front arc part, 132 rear arc part, 133 inclined side surface part, 133a, 133b side surface convex part, 133c inner wall, 134 first projection part, 135 second projection part, 135a Fixing hole, 136 notch for arm, 137 opening, 200 heat dissipation part, 201 board mounting surface, 201a mounting side, 201b board mounting back surface, 201c open part, 202 decorative part, 202a outer peripheral surface, 210 heat radiation fin part, 210a Radiating fin tip concave portion, 211 radiation fin, 211a outer surface, 212 fin connecting portion, 213 arm connecting portion, 213a arm connecting hole, 214 exterior fixing hole, 215 exterior mounting notch, 216 exterior inserting hole, 218, 218a void, 220 power supply insertion hole, 1301 partition surface, 1302 screw, 2131 notch.

Claims (2)

A board mounting surface to which the light source is mounted,
At least two heat dissipating fins provided on the back surface side of the board mounting surface,
A lighting fixture having a power supply insertion hole, which is provided between the two radiation fins and into which a power supply line connected to the light source is inserted. The lighting device according to claim 1, further comprising an arm portion that is formed in a substantially U shape and has an end portion attached so as to sandwich the heat radiation fin.

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