JP2016031920A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting fixture capable of efficiently circulating air to a rear surface relative to a substrate attachment surface and ensuring efficient maintenance work.SOLUTION: A lighting fixture comprises: a radiation portion 200 having a light-emitting substrate which is attached to a front surface thereof and on which light-emitting elements are mounted and including radiation fin portions 210 provided on a substrate attachment rear surface 201b and radiating heat emitted from the light-emitting elements; and an exterior portion 130 including a front circular arc portion 131 forming an opening, accommodating therein the radiation fin portions 210 from the opening, and covering at least part of the radiation fin portions 210, the exterior portion 130 being attached to the radiation fin portions 210 by forming a clearance portion 101 between the front circular arc portion 131 and the substrate attachment rear surface 201b.SELECTED DRAWING: Figure 2

Description

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

In recent years, spotlight-type lighting fixtures that illuminate light in an arbitrary direction often use light-emitting elements such as LEDs as light sources.
The spotlight-type illuminator illuminates a predetermined object brightly and is installed indoors, and may require design properties.
For this reason, there are many devices that include a heat dissipation mechanism for efficiently lighting the light emitting element and an exterior member that takes into consideration design.

  For example, in the luminaire described in Patent Literature 1, the luminaire main body is held by a U-shaped bracket so as to be rotatable by a predetermined angle. The luminaire main body includes a substrate on which the light emitting element is mounted, a mounting surface on which the back surface of the substrate (a surface opposite to the light emitting element) comes into contact and a heat radiating portion for radiating heat from the substrate, and a substantially cylindrical bottom. It has a shape and a heat-dissipating groove and is attached to cover the heat-dissipating part. The exterior part ensures (improves) the design, and dust accumulates in the heat-dissipating part and has a heat-dissipating function. It prevents it from becoming an obstacle.

Moreover, the lighting fixture of patent document 2 is the same as the lighting fixture of patent document 1, the board | substrate with which the light emitting element was mounted, the attachment surface to which a board | substrate is attached, and an attachment surface back surface (opposite the surface to which the board | substrate was attached). A luminaire main body portion including a heat radiating portion having heat radiating fins protruding from the surface and an exterior portion covering the heat radiating portion.
The exterior part of the luminaire main body part of Patent Document 2 has an opening formed on the exterior part side surface opposite to the light emitting element of the heat radiating part and the exterior part side face facing upward when rotating by a predetermined angle. By providing the part, air circulation inside the exterior part is promoted.

Moreover, the lighting fixture described in Patent Document 3 has a plurality of radiating fins formed in a vertical direction so that the heat radiating portion is substantially the same width as the width of the mounting surface from the opposite surface of the mounting surface to which the substrate is mounted. A plurality of radiating fins are arranged substantially in parallel. Moreover, the cover provided with the bracket which points out a lighting fixture from the board | substrate side is attached so that a board | substrate may be covered.
In the luminaire of Patent Document 3, the radiation fin of the heat radiation part is formed with a large radiation area, and since the exterior part covers only the root direction of the heat radiation fin, without preventing heat radiation from the heat radiation fin, Dissipates heat efficiently.

JP 2006-294526 A JP 2014-049347 A JP 2011-154832 A

  However, in the lighting apparatus of Patent Document 1, the exterior portion has a heat radiating groove, but the portions other than the groove are in a closed state, and the air inside the exterior portion is not circulated, thereby efficiently radiating heat. There is a problem that cannot be done.

In addition, in the luminaire described in Patent Document 2, dust or the like is accumulated inside the exterior portion from the opening formed on the side surface of the exterior portion. Therefore, it is necessary to perform maintenance such as cleaning in order to maintain efficient heat dissipation performance.
However, when cleaning the heat radiating part, the exterior part is removed from the luminaire main body after the luminaire main body is removed from the bracket, and there is a problem that the maintenance work becomes complicated.

Moreover, although the lighting fixture of patent document 3 has a radiation fin of the substantially same width as an attachment surface, a thermal radiation part is formed by the aluminum casting shaping | molding which has heat dissipation performance, such as aluminum.
When forming a fin with a large heat dissipation area in the form of a plate, the plate thickness tends to increase, and there is a problem that weight and size may be increased, which has an impact on cost and design. .

  Moreover, in the point which is common in the lighting fixture of patent document 1-patent document 3, it is necessary to heat-dissipate while the surface opposite to the attachment surface to which the board | substrate was attached becomes high temperature by the heat_generation | fever influence from a light emitting element. However, the lighting fixtures of Patent Literature 1 to Patent Literature 3 have a problem in that the vicinity of the heat radiation fin is covered with an exterior portion, and air circulation to the back surface of the substrate mounting cannot be efficiently performed.

  The present invention has been made, for example, in order to solve the above-described problems, and can efficiently perform air circulation to the back surface of the board mounting surface and can efficiently perform maintenance work. The purpose is to provide.

  A luminaire according to the present invention includes a light-emitting board on which a light-emitting element is mounted on the front surface, a heat-dissipating part including a heat-dissipating fin part that dissipates heat generated from the light-emitting element on the back surface, and a peripheral part that forms an opening The radiating fin portion is housed in the opening through the opening and covers at least a part of the radiating fin portion, and a gap is formed between the peripheral edge portion and the back surface to form the radiating fin portion. And an exterior part to be attached.

  The lighting apparatus according to the present invention is an exterior part that houses the radiation fin portion from the opening and covers at least a part of the radiation fin portion, and forms a gap between the peripheral edge portion and the back surface of the opening. Since the exterior portion attached to the heat radiating fin portion is provided, the air circulation to the back surface of the substrate attachment surface can be efficiently performed, and the maintenance work can be efficiently performed.

1 is a perspective view of a lighting fixture according to Embodiment 1. FIG. 2 is a lateral side view of the lighting apparatus according to Embodiment 1. FIG. FIG. 3 is an exploded perspective view of a lighting fixture main body portion of the lighting fixture according to Embodiment 1. It is an expanded view of the thermal radiation part of the lighting fixture which concerns on Embodiment 1, (a) is a side view of a thermal radiation part, (b) saw the thermal radiation part from the side (Z direction side) in which the thermal radiation fin part was formed. FIG. It is AA sectional drawing shown in FIG.4 (b) of the thermal radiation part which concerns on Embodiment 1. FIG. 3 is a perspective view of an exterior part according to Embodiment 1. FIG. FIG. 3 is an exploded side view of the lighting fixture according to Embodiment 1. It is a disassembled perspective view of the back viewpoint (seen from the heat radiating part upper direction) of the lighting fixture which concerns on Embodiment 1. FIG. It is a figure which shows the movable operation | movement (a)-(c) with respect to the arm part of the lighting fixture main-body part which concerns on Embodiment 1. FIG. It is a figure which shows the variation (a)-(c) of the partition surface in the thermal radiation part which concerns on Embodiment 1. FIG. It is a figure which shows the modification of the thermal radiation part which concerns on Embodiment 1. FIG.

  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. Moreover, in the following drawings, the relationship of the size of each component may be different from the actual one. Also, in the description of the embodiment, directions and positions such as “top”, “bottom”, “left”, “right”, “front”, “back”, “front”, “back” are indicated. These notations are merely described as such for convenience of explanation, and do not limit the arrangement, orientation, etc., of devices, instruments, parts, and the like.

Embodiment 1 FIG.
FIG. 1 is a perspective view of a lighting fixture 1 according to the present 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 luminaire main body 100 of the luminaire 1 according to the present embodiment. FIG. 4 is a development view of the heat dissipating part 200 of the lighting fixture 1 according to the present embodiment, where (a) is a side view of the heat dissipating part 200, and (b) is a heat dissipating part 200 formed with heat dissipating fins 210. It is the figure seen from the side (Z direction side). FIG. 5 is a cross-sectional view taken along line AA shown in FIG. 4B of the heat dissipating unit 200 according to the present embodiment.

The whole structure of the lighting fixture 1 which concerns on this Embodiment is demonstrated using FIGS.
In the present embodiment, a spotlight type lighting fixture that is used by being fitted to a lighting duct or the like will be described as an example of the lighting fixture 1.

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

  As shown in FIGS. 1 to 3, the luminaire main body unit 100 includes a light emitting substrate unit 110 in which a light emitting element 111 such as an LED is mounted on a substrate unit 112, and a light distribution cover disposed on the front surface of the light emitting substrate unit 110. Part 120, light-emitting substrate part 110 is attached, and heat-radiating part 200 that dissipates heat generated from light-emitting substrate part 110, and exterior part 130 that covers part of heat-radiating part 200 are provided.

As shown in FIG. 1, the holding part 20 includes a pair of arm parts 21. The holding part 20 includes a fixing part provided at each end of the pair of arm parts 21, and holds the side part of the heat radiation part 200 so as to be rotatable by the fixing part. The fixing portion includes a hole formed at an end portion of the arm portion 21 and a screw that is inserted into the hole and fixes the arm portion 21 and the heat radiating portion 200.
Note that the fixing portion may not be configured by the holes and screws of the arm portion 21. For example, the pair of arm portions 21 may have a protrusion that protrudes inward from each end portion, and the heat dissipation portion 200 may be rotatably held by the protrusion. Further, the heat dissipating part 200 includes a protrusion protruding from a position corresponding to the fixed part in the heat dissipating part 200, and the heat dissipating part 200 can be rotated by engaging the protrusion and a hole formed in the arm part 21. The structure hold | maintained at the arm part 21 may be sufficient.

In addition, as shown in FIG. 2, the heat radiating unit 200 is held by the holding unit 20, and the screws inserted into the respective end portions of the pair of arm units 21, that is, each of the pair of arm units 21. A straight line connecting the fixed portions is rotated in the vertical direction about an axis 25.
In addition, the holding | maintenance part 20 should just have the arm part 21 which fixes the thermal radiation part 200 so that rotation is possible, and does not need to be U-shaped. For example, the holding part 20 may be U-shaped, V-shaped, I-shaped, L-shaped, 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. Among them, the heat radiating portion 200 is held by only one of the arm portions 21.
The I-shaped holding portion 20 is 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 radiating portion 200, for example. The heat radiation part 200 is held by the arm part 21. The I-shaped holding portion 20 has one end fixed to the power supply block 10 and the other end holding the heat radiating portion 200 between adjacent heat radiating fin portions 210 in the heat radiating portion 200 in a rotatable manner. .

In the light emitting substrate 110, a plurality of light emitting elements 111 such as LEDs are arranged and mounted radially at substantially equal intervals on a disk-shaped substrate 112.
In addition, the light emitting substrate unit 110 is fixed so that the surface (substrate unit rear surface 110a) opposite to the surface on which the light emitting element 111 is mounted (substrate unit front surface 110b) is in contact with the heat radiation unit 200.

The light distribution cover part 120 is formed by molding a member such as 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.
The light distribution cover portion 120 is provided with a light distribution lens (not shown) having a substantially semicircular shape so as to face the light emitting element 111 on the surface facing the light emitting substrate portion 110.

  Note that the shape of the light emitting substrate 110 may not be circular. The present embodiment can be applied to an ellipse, a rectangle, a polygon, an indefinite shape, and the like.

  The heat radiation part 200 is formed by molding a material having heat radiation performance such as aluminum. The heat dissipating part 200 includes a substrate attaching surface 201 to which the light emitting substrate part 110 is attached, and a plurality of heat dissipating fin parts 210 formed on the opposite surface (substrate attaching back surface 201b) (see FIG. 2) of the substrate attaching surface 201. Yes.

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

The decorative portion 202 is formed in a wide-angle direction (a direction spreading 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 installed.
Further, the decorative portion 202 dissipates heat from the light emitting substrate portion 110 fixed to the substrate attachment surface 201 together with the heat dissipating fin portion 210 described later.

As shown in FIGS. 4 and 5, a surface opposite to the surface of the substrate mounting surface 201 on which the light emitting substrate portion 110 is mounted is defined as a substrate mounting back surface 201b. A plurality of radiating fin portions 210 are formed on the substrate mounting back surface 201b so as to stand on the substrate mounting back surface 201b.
The heat radiating fin part 210 includes two adjacent heat radiating fins 211 and a fin connecting part 212 that connects the two adjacent heat radiating fins 211.
As shown in FIG. 4 (b), the heat dissipating fin portion 210 includes the adjacent heat dissipating fins 211 among the heat dissipating fins 211 arranged radially so as to form an open portion 201c in the center of the substrate mounting back surface 201b. Two pieces are connected by a fin connecting portion 212 and are integrally formed.
Therefore, in the present embodiment, 12 radiating fins 211 are arranged, and six radiating fin portions 210 are arranged.

  As shown in FIG. 5, the radiating fin 211 has a substantially trapezoidal plate shape, the inner side surface rises substantially perpendicularly from the board mounting back surface 201b, and the outer side surface 211a is gradually inclined inward from the board mounting back surface 201b. It is formed as follows. The upper surface of the radiation fin 211 is gradually inclined toward the substrate mounting back surface 201b toward the center of the substrate mounting back surface 201b. The inclination corresponding to the outer surface 211a of the heat dissipating 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 dissipating part 200, the direction opposite to the irradiation direction of the light emitting element, that is, the direction of the tip of the heat dissipating fin 211 is defined as the upward direction of the heat dissipating part.
The radiating fins 211 are formed so that the plate thickness gradually decreases as going upward in the radiating portion. In other words, the thickness of the heat radiation fin 211 gradually decreases as it goes from the substrate mounting back surface 201b side to the tip.

Since the heat radiation fin 211 is thick in the vicinity of the substrate mounting back surface 201b, which has a high temperature, the thermal resistance is small. Moreover, since the plate | board thickness becomes thin gradually as the heat radiation fin 211 goes to the heat radiation part upper direction where temperature is suppressed by the heat radiation effect, thermal resistance becomes large gradually.
As described above, according to the heat radiation fin 211 according to the present embodiment, the heat radiation fin 211 is considered to have a heat radiation temperature necessary for the portion of the heat radiation fin 211 (having thermal resistance) rather than having a uniform thickness. The thickness is reduced, and the weight can be reduced. Therefore, the manufacturing cost can be reduced.
The heat radiation fin 211 has a shape in which the plate thickness becomes thinner (continuously) as it goes upward, and is a shape in which a mold can be easily pulled upward by casting or die casting, and has a good formability. It is.
The shape of the radiating fin does not have to be gradually thinned, but may be gradually thinned.

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

The fin coupling portion 212 is disposed on the center side (the center opening portion 201c side) of the substrate mounting back surface 201b of the heat radiation fin 211. In addition, the height from the board mounting back surface 201 b to the tip of the fin connection part 212 is shorter than the height from the board mounting back surface 201 b of the radiation fin 211 to the tip of the radiation fin 211. Therefore, a radiating fin tip recess 210a having a concave shape is formed at the tip of the radiating fin portion 210 (see FIG. 4).
This heat radiation fin tip recess 210a improves the design when the heat radiation part 200 is viewed from above the heat radiation part (FIG. 4B).

The upper surface of the fin connecting part 212 in the upper direction of the heat dissipating part serves as a boss part (base part) of the push pin when the heat dissipating part 200 is pushed out from the mold. Therefore, the difference between the upper surface of the fin coupling portion 212 and the tip of the radiating fin 211 (the recess width of the radiating fin tip recess 210 a) is set to a length that allows the push pin to reach the upper surface of the fin coupling portion 212.
Further, the area of the upper surface of the fin coupling portion 212 is large enough to function as a boss portion of the push pin. The width of the upper surface of the fin coupling portion 212 is determined by, for example, the diameter of the tip surface of the push pin. The width of the upper surface of the fin connecting portion 212 where the exterior fixing hole 214 is formed is such that the thickness around the exterior fixing hole 214 does not become too thin so that the exterior fixing hole 214 functions as a fixing hole. Let it be wide.

  In addition, the fin connecting part 212 serves to reinforce the heat dissipating fins 211. When the heat dissipating part 200 is cast and formed of aluminum or the like, the fin connecting part 212 functions as a receiving part and a boss of a molding die, and pressurization at the time of forming. It becomes a reinforcement of the radiation fin 211 with respect to.

In addition, although the fin connection part 212 may be reduced depending on a shaping shape, when the fin connection part 212 is not provided, it is necessary to maintain the strength with the heat radiation fin shape itself, and the width is increased and the plate thickness is increased. It is necessary to consider the design and cost.
In this 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 fin 211 connected by the fin connecting portion 212. May not be two. For example, three or four radiating fins 211 may be connected.
Further, when the extrusion pin pushes the fin connecting portion when taking out from the mold, it is not necessary to separately provide a boss for the extrusion pin, and the design is improved.

The radiating fin portion 210 includes two radiating fins 211 and a fin connecting portion 212, and a notch or the like is formed in accordance with an arrangement location on the substrate mounting back surface 201b.
For example, as shown in FIG. 4B, an arm coupling portion 213 having an arm coupling hole 213 a coupled to the arm portion 21 is formed between the radiation fin portion 210 and the radiation fin portion 210. A part of the radiating fin 211 adjacent to the lower side of the arm connecting portion 213 (the Y-axis lower direction in FIGS. 4A and 4B) is cut so that the luminaire main body 100 can be rotated by a predetermined angle. A notch 2131 is formed.

  Also, an exterior fixing hole 214 (exterior fixing part) for fixing the exterior part 130 is formed at the tip of the pair of fin coupling parts 212 located at the center in the X-axis direction in FIG. 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) or the like.

  4A and 4B, the first fin 134 (see FIG. 6) of the exterior portion 130 described later is provided on the heat radiation fins 211 of the two heat radiation fin portions 210 disposed in the Y-axis lower direction. Is formed with an exterior mounting cutout 215 and an exterior insertion hole 216.

  Further, a gap 218 is formed between the adjacent radiating fin portions 210 and the radiating fin portions 210. The air gap 218 is formed so that the board mounting back surface 201b side is narrow and widens in the upward direction of the heat dissipating part according to the change in the plate thickness of the heat dissipating fin 211, so that air can be circulated effectively. Yes.

  FIG. 6 is a perspective view of the exterior part 130 according to the present embodiment. FIG. 7 is an exploded side view of the lighting fixture 1 according to the present embodiment. FIG. 8 is an exploded perspective view of the luminaire 1 according to the present embodiment from the rear viewpoint (viewed from above the heat dissipating part). FIG. 9 is a diagram showing the movable operations (a) to (c) with respect to the arm unit 21 of the luminaire main body unit 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 diagram illustrating a modification of the heat dissipation unit 200 according to the present embodiment.

The exterior part 130 shown in FIG. 6 covers a part of the radiation fin part 210.
As shown in FIG. 7, the heat radiating part 200 rotates in the vertical direction about a line connecting the arm connecting holes 213 a (fixed part of the arm part 21) as the axis 25. At this time, a surface that includes the shaft 25 and is substantially orthogonal to the substrate mounting back surface 201b is defined as a partition surface 1301. The partition surface 1301 is a virtually set surface. The exterior portion 130 is attached to the heat radiation fin portion 210 so as to cover the portion of the heat radiation fin portion 210 that is outside when the heat radiation portion 200 rotates in the heat radiation fin portion 210 provided in the heat radiation portion 200.
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 213 a as the shaft 25 from FIG. 9A. It is the radiation fin part 210 located outside the partition surface 1301 when it rotates to FIG.9 (b).

As shown in FIG. 6, the exterior part 130 has a substantially semi-cylindrical shape with both ends opened. The exterior portion 130 has a rear arc portion 132 that is an end portion on the heat radiation portion upper side smaller than a front arc portion 131 that is an end portion on the irradiation direction side. The front arc portion 131 is a peripheral portion that forms an opening 137 on the irradiation direction side in the exterior portion 130.
The exterior part 130 is formed so that the circle centers of the front arc part 131 and the rear arc part 132 are coaxial. As for the exterior part 130, the side surface part 133 inclines so that the side surface may respond to the inclination of the outer surface 211a (refer FIG. 5) of the radiation fin 211. FIG.

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 protrusion 133 a so as to protrude from the front arc portion 131.
In addition, the inclined side surface portion 133 is formed with a second protrusion 135 (engagement portion) that protrudes 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 formed with a fixing hole 135a penetrating in the axial direction of the exterior part 130 in a substantially semi-cylindrical shape.

In addition, the 1st projection part 134 and the 2nd projection part 135 may be formed integrally with the inclined side surface part 133, and may combine another thing.
Further, in place of the exterior insertion hole 216 of the heat radiating 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 convex portion 133a side. An insertion hole for inserting (not shown) may be provided.
In addition, the first protrusion 134 ′ (not shown) formed separately is fixed in advance to the exterior insertion hole 216 (see FIG. 4) of the heat radiating portion 200, and the exterior projection hole 216 is formed on the side convex portion 133a side. You may provide the insertion hole for inserting inserted 1st protrusion part 134 '(not shown).

  In the exterior part 130, the center of the circle of the front arc part 131 and the rear arc part 132 is arranged to be coaxial, but the circumferential angle is formed larger on the rear arc part 132 side than the front arc part 131 side. ing. Therefore, the rear arc part 132 side of the exterior part 130 covers more radiating fin parts 210 than the front arc part 131 side.

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

Next, an attaching method for attaching the exterior part 130 to the heat radiating part 200 will be described with reference to FIGS. 7 and 8.
First, the exterior part 130 is inserted in the heat radiation part 200 in the arrow direction shown in FIG. At this time, the first protrusion 134 is inserted into the exterior insertion hole 216.
The second protrusion 135 (engagement portion) is fitted into the heat radiation fin tip recess 210a of the heat radiation fin portion 210 having the exterior fixing hole 214 (exterior fixing portion). The second protrusion 135 (engaging portion) engages with the exterior fixing hole 214 (exterior fixing portion). The second projecting portion 135 is disposed coaxially with the exterior fixing hole 214, and the second projecting portion 135 is fixed to the fin coupling portion 212 in which the exterior fixing hole 214 is formed by screwing means such as a screw 1302. Thereby, the exterior part 130 is fixed to the heat radiating part 200. The method of 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 convex portion 133a contacts the bottom portion of the exterior attachment notch 215 (the surface portion on which the exterior insertion hole 216 is formed). . As shown in FIG. 7, the exterior insertion hole 216 is formed at a position shifted by a predetermined width (L1) from the substrate mounting back surface 201b toward the tip (upward direction of the heat dissipating part). Therefore, a gap portion 101 (see FIG. 2) having a predetermined width (L1) is formed between the front arc portion 131 of the exterior portion 130 and the substrate mounting back surface 201b. In other words, the exterior mounting notch portion 215 is provided so that the gap portion 101 having a predetermined width is formed between the front arc portion 131 and the substrate mounting back surface 201b.

The exterior part 130 is inserted from the rear side 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 fixing hole 214. In addition to being able to be fixed, the luminaire main body 100 can be easily detached even if it is connected to the holding unit 20.
Moreover, when the exterior part 130 has the notch part 136 for arms, when the lighting fixture main body part 100 rotates in a predetermined direction, the exterior part 130 and the arm part 21 rotate without interference. Can do.

  As shown in FIG. 7 and FIG. 9, the exterior part 130 includes the shaft 25 that passes through the arm connection hole 213 a and the surface that is substantially orthogonal to the board mounting back surface 201 b is a partition surface 1301. And is attached so as to cover the heat dissipating part 200 located on the outer side from the partition surface 1301.

The luminaire main body 100 rotates from (a) in FIG. 9 to (c) in FIG. 9.
FIG. 9A shows a state in which the irradiation direction of the light emitting element is a substantially horizontal direction, and this state is a first state of the heat dissipation unit 200. FIG. 9C shows a state in which the irradiation direction of the light emitting element is substantially downward, and this state is a second state of the heat dissipation unit 200.
The radiating fin portion 210 located outside the partition surface 1301 is a radiating fin portion in which the arm portion 21 does not pass the vicinity of the outer surface 211a when the luminaire main body portion 100 of the plurality of radiating fin portions 210 rotates. 210 (radiation fin 211). Therefore, one of the two heat radiation fins 211 of the heat radiation fin part 210 may be covered with the exterior part 130 and the other may not be covered with the outer exterior part 130.

Since the exterior part 130 covers the heat radiating fins 211 located outside the partition surface 1301, the lighting fixture 1 irradiates a predetermined direction (for example, (a) or (b) in FIG. 9). Sometimes it becomes difficult to see the power line from below. Further, the decorative portion 202 and the inclined side surface portion 133 are formed so that the inclination is on substantially the same straight line (see FIG. 9A). Therefore, the designability of the lighting fixture 1 is improved.
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. 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 if they form one continuous smooth curved surface (substantially continuous curved surface, substantially flat shape). In this manner, the design is improved by forming the decorative portion 202 and the exterior portion 130.

FIG. 10 is a diagram showing variations (a) to (c) of the partition surface 1301 according to the present embodiment.
FIG. 10A shows the partition surface 1301 that includes the shaft 25 and is substantially orthogonal to the substrate mounting back surface 201b, as described above. A portion R1 of the radiating fin portion 210 covered by the oblique lines indicates the radiating fin portion 210 positioned outside the partition surface 1301.
FIG. 10B shows a partition surface 1301a that includes the shaft 25 and intersects the substrate mounting back surface 201b so as to be inclined outward. According to the partition surface 1301a shown in FIG. 10 (b), the portion R2 covering the radiating fin portion 210 is narrower than R1 in FIG. 10 (a), so that the exterior portion 130 can be reduced in size and the design. The manufacturing cost can be reduced while maintaining the properties.
FIG. 10C shows a partition surface 1301b that includes the shaft 25 and intersects the substrate mounting back surface 201b so as to be inclined inward. According to the partition surface 1301b shown in FIG. 10C, the portion R3 that covers the radiating fin portion 210 is wider than R1 in FIG. 10A, and covers more radiating fin portions 210. Will be improved.

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

  In addition, the heat dissipating part 200 is arranged such that the heat dissipating fin part 210 has a gap 218 between the heat dissipating fin part 210 and the front arc part 131 of the exterior part 130 and the substrate mounting back surface 201b. A gap 101 (see FIG. 2) is formed between them. The gap 218 and the gap 101 communicate with each other. Therefore, the air circulation of the periphery of the substrate mounting back surface 201b, which is predicted to be the highest temperature, is promoted, and the heat dissipation effect is improved.

  In addition, since the gap 101 is provided, dust and the like are easily removed from the inside of the heat dissipating unit 200, so that air circulation and heat dissipating capacity of the heat dissipating unit 200 are less likely to occur due to accumulation of dust and the like. ing.

In the present embodiment, the heat dissipating part 200 has heat dissipating fins 211 formed so that the plate thickness is thicker on the substrate mounting back surface 201b side and becomes thinner as it goes upward in the heat dissipating part (the direction opposite to the irradiation direction of the light emitting element 111). The two adjacent heat radiating fins 211 are integrally formed by the fin connecting portion 212.
Due to such an inclination that the plate thickness becomes thinner upward, when the heat radiating part 200 is formed by aluminum casting (or injection molding), the molding die is pulled upward (the direction opposite to the light emitting substrate). In addition to being easy, the fin connecting portion 212 serves to reinforce the heat dissipating fins 211 during molding, and the heat dissipating portion 200 can be easily formed.
In addition, since the radiating fin 211 is formed integrally with the fin coupling portion 212, the plate thickness can be made thinner than that formed by the radiating fin 211 alone. Further, by reducing the plate thickness, it is possible to increase the number of heat dissipating fin portions 210 and further increase the heat dissipating effect.

In the present embodiment, the exterior part 130 includes a first connection part formed by the first protrusion part 134 and the exterior insertion hole 216, and a second connection part formed by the second protrusion part 135 and the exterior fixing hole 214. While being able to fix by inserting from the back of the main-body part 100, even if the lighting fixture main-body part 100 is connected to the arm part 21, it can attach or detach.
Therefore, the restriction of the assembly order of product assembly can be eliminated, and the assembly work is facilitated. Further, the exterior portion 130 can be easily attached and detached during maintenance such as cleaning.

  In the present embodiment, the heat dissipating part 200 is formed so that the heat dissipating fins 211 have a thick plate pressure on the substrate mounting back surface 201b side and become thinner in the upward direction (the direction opposite to the light emitting element irradiation direction). The substrate mounting back surface 201b is formed with a small thermal resistance, the adjacent radiating fin portions 210 are provided with a gap, and the gap portion 101 is formed between the exterior portion 130 and the substrate mounting back surface 201b. As a result, air circulation is efficiently performed around the periphery of the substrate mounting back surface 201b.

FIG. 11 is a diagram illustrating modifications (a) and (b) of the heat dissipating unit 200 in the present embodiment.
In the present embodiment, the arrangement of the respective parts on the substrate mounting back surface 201b has been described with reference to FIG. 4B. However, as shown in FIG. 11A, the inside of the radiation fin part 210 ′ (two radiation fins 211 ′). The arm connecting portion 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 heat dissipating fins 211 ′. The exterior fixing hole 214 is formed on the upper end surface of the fin connecting portion 212 ′.
By adopting the configuration as shown in FIG. 11A, the gap 218a is formed in the portion that was the arm connecting portion 213 in FIG. 4B. Therefore, it is possible to increase the number of air inlets to the substrate mounting back surface 201b and improve the heat dissipation efficiency.

  Further, as shown in FIG. 11B, the power supply insertion hole 220 ′ may be disposed on the lower side of the Y-axis, and the power supply line (not shown) is connected to the fin coupling portion 212 or the radiating fin tip of the radiating fin portion 210. It may be fixed to the recess 210a and may be a support portion for the power supply line when moving.

  As mentioned above, although embodiment of this invention was described, you may implement this embodiment partially. Or you may implement combining two or more parts of this embodiment. In addition, this invention is not limited to this embodiment, A various change is possible as needed.

  DESCRIPTION OF SYMBOLS 1 Lighting fixture, 10 Power supply block, 20 Holding part, 21 Arm part, 25 axis | shaft, 100 Lighting fixture main-body part, 101 Crevice part, 110 Light emitting board part, 110a Substrate part back surface, 110b Substrate part surface, 111 Light emitting element, 112 board | substrate Part, 120 light distribution cover part, 130 exterior part, 131 front arc part, 132 rear arc part, 133 inclined side part, 133a, 133b side convex part, 133c inner wall, 134 first projection part, 135 second projection part, 135a Fixing hole, 136 Notch portion for arm, 137 Opening, 200 Heat radiation portion, 201 Substrate mounting surface, 201a Mounting side portion, 201b Substrate mounting back surface, 201c Open portion, 202 Makeup portion, 202a Outer peripheral surface, 210 Radiation fin portion, 210a Radiation fin tip recess, 211 Radiation fin, 211a outer surface, 212 Fin connection , 213 arm connecting portion, 213a arm connection hole, 214 exterior fixing hole, 215 notch for exterior mounting, 216 exterior insertion hole, 218,218A voids 220 power insertion hole 1301 partition surface, 1302 screws, 2131 notch.

Claims (6)

A heat-dissipating part including a light-emitting substrate on which a light-emitting element is mounted and a heat-dissipating fin part that dissipates heat emitted from the light-emitting element on the back surface,
An outer peripheral portion that includes a peripheral portion that forms an opening, accommodates the radiating fin portion therein from the opening, and covers at least a part of the radiating fin portion, wherein a gap is provided between the peripheral portion and the back surface. A lighting fixture comprising: an exterior portion formed and attached to the heat dissipating fin portion. The radiating fin portion is
A plurality of radiating fins formed so as to stand on the back surface, and including a plurality of radiating fins in which gaps are formed between adjacent radiating fins,
The lighting apparatus according to claim 1, wherein the gap and the gap communicate with each other.   Each radiating fin of the plurality of radiating fins has a plate shape, and the plate thickness gradually decreases from the back side to the tip. A fin coupling portion for coupling at least two of the plurality of radiation fins;
The exterior part is
The lighting fixture according to claim 2, wherein the lighting fixture is attached to the fin coupling portion. The exterior part is
A first protrusion protruding outward from the peripheral edge;
The radiating fin portion is
5. The lighting apparatus according to claim 1, further comprising an exterior insertion hole that engages with the first protrusion at a position shifted by a predetermined width from the back surface toward the tip. The heat dissipation part is
The lighting fixture according to any one of claims 1 to 5, further comprising a decorative portion that is formed so as to spread from the peripheral portion of the surface in the irradiation direction.

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