JP7655085B2 - Lighting equipment - Google Patents

Description

This disclosure relates to a lighting device equipped with a heat sink.

Conventionally, some lighting devices use heat sinks to dissipate heat from the light source.

For example, some lighting devices use a heat sink formed by combining a base portion, which is a plate-shaped metal plate, with a fin portion formed by bending the plate-shaped metal plate. (See, for example, Patent Document 1.)

JP 2015-162342 A

However, the heat dissipation fins of this lighting device are fixed to the base on one side but not on the other side. Therefore, when an external force such as vibration is applied to the lighting fixture, one side will move around the axis of rotation of the other side, which may damage the heat dissipation fins.

Therefore, the present invention has been made to solve the above problems, and aims to provide a lighting device that reduces damage to the fins.

The lighting device of the present disclosure comprises a light-emitting section in which light-emitting elements are mounted on a substrate, a plate-shaped base section to which the light-emitting section is attached on one surface, a heat sink having two heat dissipation fins protruding in a plate-like manner from the other surface of the base section, and a fin holding section arranged to connect the end sides of the two heat dissipation fins in the protruding direction, wherein the two heat dissipation fins are arranged so that one surface of each of the plate-shaped surfaces faces each other, and the fin holding section has a fin pressing section that covers the end sides of the two heat dissipation fins from the protruding direction, and the fin pressing section has a horizontal pressing section arranged to connect the two heat dissipation fins in a direction intersecting the protruding direction, and a vertical pressing section protruding from the horizontal pressing section to abut the other surface of the heat dissipation fin .

The lighting device disclosed herein can prevent damage to the heat dissipation fins.

1 is a perspective view of a lighting device according to a first embodiment. FIG. 2 is an exploded perspective view of the lighting device according to the first embodiment. FIG. 2 is an exploded perspective view of the lighting device according to the first embodiment. FIG. 2 is a perspective view of a heat sink part according to the first embodiment. FIG. 2 is a perspective view of a base portion according to the first embodiment. FIG. 2 is a perspective view of a fin portion according to the first embodiment. 4 is a plan view of the heat sink part in the first embodiment. FIG. FIG. 2 is a perspective view of a connecting portion in the first embodiment. 2 is a plan view of the top plate portion in the first embodiment. FIG. FIG. 2 is a perspective view of a top plate portion according to the first embodiment. 4 is a reference plan view showing the positional relationship between a heat sink portion and a top plate portion in the first embodiment. FIG. 3 is a perspective view of a fin holding portion according to the first embodiment. FIG. 4A to 4C are three-view diagrams of a fin holding portion in the first embodiment. FIG. 2 is a perspective view of an arm according to the first embodiment. 10 is a reference perspective view showing a state in which a fin holding portion is attached to a fin portion in the first embodiment. FIG. 10 is a reference perspective view showing a state in which a fin holding portion is attached to a fin portion in the first embodiment. FIG.

Embodiment 1.
The present disclosure relates to a lighting device equipped with a heat sink, which reduces damage to the fins.
Hereinafter, as an embodiment of the present disclosure, a lighting device 1 that is attached to a mounting portion such as a ceiling will be described.
In the following description, terms expressing directions are used as appropriate, but these terms are for the purpose of explanation and do not limit the lighting device. Examples of terms expressing directions include "up", "down", "right", "left", "front" and "rear". In addition, in each of the drawings described below, the Z axis indicates the up-down direction, the X axis indicates the left-right direction, i.e., the horizontal direction, and the Y axis indicates the front-rear direction, i.e., the depth direction. The X axis, the Y axis and the Z axis are perpendicular to each other, the X axis and the Y axis are horizontal, and the Z axis is vertical. Note that these names are determined for the convenience of explanation and do not limit the arrangement and orientation of the device and parts.

The configuration of each part of the lighting device 1 will be described with reference to Figures 1 to 11. Figure 1 is a perspective view of the lighting device 1. Figure 2 is an exploded perspective view of the lighting device 1 shown in Figure 1 as viewed from the downward direction Z2 side. Figure 3 is an exploded perspective view of the lighting device 1 shown in Figure 1 as viewed from the upward direction Z1 side. Figure 4 is a perspective view of the heat sink part 13 shown in Figure 2. Figure 5 is a perspective view of the base part 131 shown in Figure 4. Figure 6 is a perspective view of the fin part 132 shown in Figure 4. Figure 7 is a plan view of the heat sink part 13 shown in Figure 4 as viewed from the upward direction Z1. Figure 8 is a perspective view of the connecting part 14 shown in Figure 2, where (a) of Figure 8 is a perspective view as viewed from the left direction X2 side, and (b) of Figure 8 is a perspective view as viewed from the right direction X1 side. Figure 9 is a plan view of the top plate part 15 shown in Figure 2 as viewed from the upward direction Z1. 10 is a perspective view of the top plate portion 15 shown in FIG. 9, (a) of FIG. 10 is a perspective view seen in the downward direction Z2, and (b) of FIG. 10 is an enlarged perspective view of part A shown in (a) of FIG. 10. FIG. 11 is a reference plan view showing the state in which the top plate portion 15 shown in FIG. 10 is attached to the heat sink portion 13. FIG. 12 is a perspective view of the fin holding portion 17 shown in FIG. 2. FIG. 13 is a three-sided view of the fin holding portion 17 shown in FIG. 12, (a) of FIG. 12 is a plan view of the fin holding portion 17 seen from the upward direction Z1 side, (b) of FIG. 12 is a front view of the fin holding portion 17 seen from the forward direction Y1 side, and (c) of FIG. 12 is a side view of the fin holding portion 17 seen from the right direction X1 side. FIG. 14 is a perspective view of the arm 20 shown in FIG. 2.

The lighting device 1 includes a light source unit 10, an arm 20 that is attached to a mounting portion, and a connection member 30 that connects the light source unit 10 and the arm 20. In the lighting device 1, the light source unit 10 is held by the connection member 30 on the arm 200 so that it can rotate in the depth direction Y.

The light source unit 10 includes a light-emitting section 11, a cover section 12, a heat sink section 13, a connecting section 14, a top plate section 15, a power supply unit 16, and a fin holding section 17.

The light emitting section 11 includes a plurality of light emitting elements 111 and a substrate 112 on which the plurality of light emitting elements 111 are mounted.
The substrate 112 is a flat electronic substrate. A plurality of light emitting elements 11 are mounted on a mounting surface 1121, which is one surface of the mounting substrate 112. The substrate 112 is also provided with wiring conductors (not shown) that electrically connect the electrodes of the plurality of light emitting elements 111. The substrate 112 is also provided with a substrate terminal 113 for power supply at one end thereof. A secondary electric wire portion 1612 is connected to the substrate terminal 113 to receive power supply from the power supply device 16. The substrate terminal 113 is disposed on the front direction Y1 side of the mounting substrate 112 in FIG. 2.

The cover portion 12 is formed of a transparent material and serves to protect the light emitting portion 11. The cover portion 12 is attached to the base portion 13 so as to cover the light emitting portion 11.
The cover part 12 has a box-shaped cover main part 121 that is open on the upward direction Z1 side, and a cover flange part 122 that protrudes in the horizontal direction XY from the periphery of the opening of the cover main part 121. A cover through hole 123 is formed in the cover flange part 12b to fix the cover part 12 to the base part 13.
The cover portion 12 may be provided with a lens (not shown) on the surface of the cover main portion 121 facing the light emitting portion 110, for controlling the light from the light emitting element 111 to a predetermined light distribution.

The heat sink section 13 is attached to the light emitting section 11. The heat sink section 13 transfers heat generated when the light emitting section 11 emits light, and dissipates the transferred heat.
The heat sink portion 13 has a base portion 131 and a fin portion 132. The heat sink portion 13 is formed by processing the base portion 131 and the fin portion 132 from a plate-shaped metal member. The metal member is, for example, aluminum. By using aluminum, the weight can be reduced and heat dissipation can be improved.

The base portion 131 has a base main portion 1311 and a base flange portion 1312. The base portion 13 is formed by bending a plate of a material such as aluminum, which has good heat dissipation properties and is lighter than iron, for example, by pressing.

The light emitting unit 110 is attached to the base main portion 1311. The base main portion 1311 is a plate-like metal member formed into a rectangular shape.
One plate-like surface of the base main part 1311 is a light source attachment part 1311a that holds the light emitting part 11. The light source attachment part 1311a is attached so that the surface opposite to the mounting surface 1121 of the mounting board 112 abuts against the light source attachment part 1311a. The other plate-like surface of the base main part 1311, which is the surface opposite to the light source attachment part 1311a of the base main part 1311, is a fin attachment part 1311b to which the fin part 132 is attached.
The base main part 1311 is provided with a base electric wire insertion part 1311c. The base electric wire insertion part 1311c is an opening penetrating the base main part 1311 in the up-down direction Z, and the secondary electric wire part 1612 is inserted through the base electric wire insertion part 1311c. When the light emitting part 11 is arranged on the base main part 131, the base electric wire insertion part 1311c is provided adjacent to an end part of the light emitting part 11 on the side where the board terminal 113 is arranged.

The base flange 1312 is a portion that protrudes downward in the Z2 direction from each side of the base main part 1311. The base flange 1312 is provided so as to be perpendicular to the base main part 1311, and reinforces the rigidity of the base main part 1311.
The base flange portion 1312 has a flange main body portion 1312a and a fitting portion 1312b. Two flange main bodies 1312a are disposed with a gap between them on one side of the base main portion 1311. The fitting portion 1312b is a portion between the two flange main bodies 1312a, and a part of the connecting portion 14 is fitted into the fitting portion 1312b.
Furthermore, since the base flange portion 1312 protrudes downward in the Z2 direction, accumulation of dust or water on the base main portion 131 can be suppressed compared to when the base flange portion 1312 protrudes upward in the Z1 direction.

The fin section 132 is disposed in a spiral shape on the fin attachment section 1311b of the base section 131, centered on the base central section 1310 which is the center of the fin attachment section 1311b, and has a fin fixing section 1321, a first heat dissipation fin 1322, and a second heat dissipation fin 1323. The first heat dissipation fin 1322 and the second heat dissipation fin 1323 are formed in a plate shape, and protrude in the upward direction Z1 so as to be perpendicular to the base main section 1311. The first heat dissipation fin 1322 and the second heat dissipation fin 1323 will be collectively referred to as heat dissipation fins 1320.
The fin portion 132 is disposed circumferentially about the base central portion 1310 and disposed so as to intersect with straight lines extending radially from the base central portion 1310. The fin portion 132 is not disposed on the base central portion 1310 side of the fin attachment portion 1311b, and a space where the fin portion 132 is not disposed is provided on the upward direction Z2 side of the base central portion 1310 side.
The multiple fin portions 132 are disposed at intervals between adjacent fin portions 132. The multiple fin portions 132 are disposed at intervals between adjacent fin portions 132 in the horizontal direction XY such that the fin portions 132 facing each other across the radial center and the plate-like surfaces of the fin portions 132 face each other. In describing the shape of the fin portions 132, the side opposite the base center portion 1310 will be described as the outer periphery.

The fin fixing portion 1321 is formed in a trapezoidal shape and is fixed to the fin mounting portion 1311b by fixing means such as screws or crimping.

The first heat dissipation fin 1322 and the second heat dissipation fin 1323 are provided to protrude in the upward direction Z1 from opposing sides of the fin fixing portion 1321.
The first heat dissipation fin 1322 and the second fin 1323 are formed in the horizontal direction XY such that the length L2 of the second heat dissipation fin 1323 is shorter than the length L1 of the first heat dissipation fin 1322. By forming the length L2 of the second heat dissipation fin 1323 shorter than the length L1 of the first heat dissipation fin 1322, when the fin portion 132 is disposed on the base portion 131, the interval between adjacent fin portions in the circumferential direction on the side of the base center portion 1310 can be made wider. Thus, an air flow path can be secured on the side of the base center portion 1310.

In the fin section 132, a first heat dissipation fin 1322 is provided with a fin protrusion 1324. In addition, the first heat dissipation fin 1322 and the second heat dissipation fin 1323 are provided with a fin recess 1325.
The fin protrusion 1324 is inserted into a part of the top plate 15 and is provided so as to protrude in the upward direction Z1 from a side portion 1323a on the upward direction Z2 side of the first heat dissipation fin 1322. The fin protrusions 1323 are provided so as to be arranged in a circumferential shape with the base central portion 1310 as the center when the multiple fins 132 are disposed on the base portion 131.
The fin recesses 1325 are provided so as to be recessed downward in the Z2 direction from each of the upward Z2 side portions 1322a of the first heat dissipation fin 1322 and the upward Z2 side portions 1323a of the second heat dissipation fin 1323. The fin recesses 1324 are provided so as to be arranged circumferentially about the base central portion 1310 when the multiple fin portions 132 are disposed on the base portion 131.

The fin portion 132 is formed such that the heat dissipation fins 1320 are longer than the fin fixing portion 1321 in the horizontal direction XY, and are formed long so as to protrude in a direction from the base center portion 1310 toward the base flange portion 1312.
Further, a portion of the heat dissipation fin 1320 that protrudes in the horizontal direction XY from the fin fixing portion 1321 is provided with a fin cutout portion 1326 at the end portion on the downward direction Z2 side so that the fin holder 17 can be hooked.
The heat dissipation fin 1320 is provided with the fin cutout portion 1320a, so that when attached to the base portion 131, a gap can be provided between the fin attachment portion 1311b and the fin holder 17 to be hooked thereon.

The connecting portions 14 connect the heat sink portion 13 and the top plate portion 15, and a total of four connecting portions 14 are disposed so as to face each other in both the width direction X and the depth direction Y of the light source unit 10. The connecting portions 14 each have a pillar portion 141, a pillar side portion 142, a base fixing portion 143, a cover holding portion 144, and a top plate fixing portion 145.
The length of the connecting portion 14 in the vertical direction Z from the base fixing portion 143 to the top plate fixing portion 145 is the same as the length of the heat dissipation fin 1320 protruding from the fin attachment portion 1311b. The length of the connecting portion 14 in the vertical direction Z is formed to be a length such that the side portion of the heat dissipation fin 1320 on the upward direction Z1 side abuts against the top plate portion 15 when the top plate portion 15 is attached to the connecting portion 14.
The connecting portion 14 may be made of a metal material such as iron or stainless steel that has a higher strength than the base portion 12. Also, by using a material with a high thermal conductivity such as aluminum, it is possible to improve the heat dissipation capacity.

The pillar portion 141 has a rectangular plate shape and is provided so as to protrude upward in the Z1 direction from the base main portion 131.
The column section 141 has a column connection section 1411 to which the connection member 30 is connected. The column connection section 1411 is provided so as to protrude from the right direction X1 side, which is the outside of the column main section 141, toward the left direction 2, which is the inside, in Fig. 8, and has an opening penetrating in the width direction X. A spiral groove is formed on the inner surface of the opening of the column connection section 1411, and the connection member 30 is screwed into and attached.

The column side parts 142 are formed on both sides of the column main part 141 in the depth direction Y, and protrude from the outside, which is the right direction X1 side in FIG. 8, to the inside, which is the left direction X2 side.

The base fixing part 143 is formed on the side edge of the column part 141 on the downward direction Z2 side. Like the column side part 142, the base fixing part 143 protrudes from the outside, which is the right direction X1 side in FIG. 8, to the inside, which is the left direction X2. The base fixing part 143 is provided with a connecting part fixing part 1431 that penetrates in the vertical direction Z. The connecting part fixing part 1431 has a spiral groove formed on its inner surface, and a screw-shaped cover fixing member 40 is inserted into the cover through-hole 123 and the base through-hole 123 from the downward direction Z1 and screwed together, connecting the cover part 12, base part 13, and connecting part 14 so that they are integrated.

The cover holding portion 144 is provided from the downward Z2 side edge of the column main portion 141 so as to protrude further in the downward Z2 direction than the base fixing portion 143. The cover holding portion 144 has a holding vertical portion 1441 and a holding horizontal portion 1442.
The holding vertical portion 1441 protrudes downward in the Z2 direction beyond the base fixing portion 143 and is fitted into the fitting portion 1322.
The holding horizontal portion 1442 protrudes from the end portion on the downward Z2 side of the holding vertical portion 1441 from the outside, which is the right direction X1 side, to the inside, which is the left direction X2 in Fig. 8. The holding vertical portion 1442 is disposed on the downward Z2 side of the cover flange portion 122 in a state in which the cover portion 12 and the connecting portion 14 are attached to the base portion 13, and prevents the cover portion 12 from falling.

The top plate mounting portion 145 is formed on the side edge of the column portion 141 on the upward Z1 side. The top plate mounting portion 145 protrudes from the outside, which is the right direction X1 side in FIG. 8, to the inside, which is the left direction X2, in the same way as the column side portion 142 and the base fixing portion 143. The top plate mounting portion 145 is provided with a top plate fixing portion 1451 that penetrates in the vertical direction Z. The top plate fixing portion 1451 has a spiral groove formed on its inner surface, and a screw-shaped top plate fixing member 50 is screwed into it from the upward Z1 direction, connecting the top plate portion 15 to the connecting portion 14.

The top plate 15 is provided to prevent dust from accumulating on the heat sink 13, and has a top plate main part 151 and a top plate connecting part 152. The top plate 15 is formed by pressing a plate material such as aluminum, which has good heat dissipation properties and is lighter than steel.

The table top main portion 151 is formed in a disk shape and is provided so as to cover the side edge on the upward direction Z1 side of the fin portion 132. The table top main portion 151 is provided with a table top opening portion 1511, a table top claw portion 1512, a table top protrusion portion 1513, and a table top slit portion 1514.
The tabletop main portion 151 has multiple tabletop openings 1511, tabletop claws 1512, tabletop protrusions 1513 and tabletop slits 1514 arranged circumferentially around a tabletop central portion 150 that faces the base central portion 1310 in the vertical direction Z.
In addition, the top plate opening 1511, top plate claw portion 1512 and top plate protrusion 1513 are arranged in a radial direction radially from the top plate central portion 150, with the top plate opening 1511 positioned close to the top plate central portion 150, followed by the top plate claw portion 1512 and the top plate protrusion 1513, which are arranged in that order farther away from the top plate central portion 150.
The top plate slit portion 1514 is adjacent to the top plate claw portion 1512 in the circumferential direction, and the top plate claw portion 1512 and the top plate slit portion 1514 are arranged so as to be on the same circumference on a circle centered on the top plate central portion 150.

The top plate openings 1511 are openings into which the fin protrusions 1324 are inserted, and are oblong holes having an elliptical shape along a circumference centered on the top plate central portion 150. One top plate opening 1511 is formed so that multiple fin protrusions 1324 can be inserted.
A plurality of top plate openings 1511 are provided in a circumferential manner with the top plate central portion 150 as the center.

The table top claw portion 1512 is provided to protrude from the surface of the table top main portion 151 on the downward direction Z2 side, and has a claw protruding portion 1512a and a claw supporting portion 1512b.
The claw protruding portion 1512a is provided so as to protrude in the downward direction Z2 from the surface of the tabletop main portion 151 on the downward direction Z2 side.
The claw support portion 1512b is provided at the end of the claw protruding portion 1512a on the downward direction Z2 side so as to protrude in a direction from the tabletop central portion 150 toward the outer periphery of the tabletop main portion 151.
A plurality of tabletop claws 1512 are provided circumferentially around the tabletop central portion 150 .

The top plate protrusion 1513 is provided so as to protrude in the downward direction Z2 from the surface on the downward direction Z2 side of the top plate main portion 151. The top plate protrusion 1513 is provided in a semispherical shape protruding in the downward direction Z2.
A plurality of top plate protrusions 1513 are provided circumferentially around the top plate central portion 150 .

The tabletop connecting parts 152 are the parts that fix the tabletop part 15 to the connecting parts 14, and are provided so as to protrude in the horizontal direction XY from the side of the tabletop main part 151. The tabletop connecting parts 152 protrude in pairs in the width direction X and the depth direction Y according to the connecting parts 14. The tabletop connecting parts 152 are provided with tabletop through holes 1521 that are provided so as to penetrate in the up-down direction Z. In addition, of the four tabletop connecting parts 152, the tabletop connecting part 152 in the rear direction Y2 is provided with a tabletop cutout part 1522 that is cut out in an elongated shape from the side part on the rear direction Y2 side toward the tabletop center part 150.

The top plate slit portion 1514 is provided adjacent to the top plate claw portion 1512, and has an opening shape that penetrates the top plate main portion 151 in the up-down direction Z. The top plate slit portion 1514 is an elliptical long hole that follows a circumference centered on the top plate central portion 150. Multiple top plate slit portions 1514 are provided in a circumference centered on the top plate central portion 150.

The top plate portion 15 is fixed to the connecting portion 14 by inserting the top plate fixing member 50 into the top plate through hole 1521 from the upward Z1 side and screwing it into the top plate portion fixing portion 1451 with the top plate connecting portion 152 placed on the top plate mounting portion 145 and the top plate through hole 1521 and the top plate fixing portion 1451 in communication with each other.

The top plate portion 15 is disposed so as to cover the fin portion 132 of the heat sink portion 13 from the upward Z1 side. At this time, the relationship between the top plate opening portion 1511, the top plate claw portion 1512, the top plate protrusion portion 1513, and the fin portion 132 is as shown in FIG.
The fin protrusions 1324 of the fin section 132 are inserted into the top plate openings 1511. Because the top plate openings 1511 have an elliptical shape, multiple fin protrusions 1324 of adjacent fin sections 132 are inserted into them. The top plate claws 1512 face the fin fixing sections 1321 of the fin section 132, and are inserted so as to be disposed between the first heat dissipation fin 1322 and the second heat dissipation fin 1323. The top plate protrusions 1513 are inserted so as to be disposed between the fin sections 132 adjacent in the circumferential direction.
The top plate portion 15 is arranged so that the top plate claw portion 1512 and the top plate protrusion portion 1513 face the plate-shaped surface of the heat dissipation fin 130, and the top plate claw portion 1512 and the top plate protrusion portion 1513 are arranged to sandwich the ends of the heat dissipation fins 130 adjacent in the circumferential direction in the upward direction Z1.
Furthermore, the top plate portion 15 is attached to the heat sink portion 13 with the fin holding portion 17 attached to the fin portion 132. Thus, the top plate portion 15 holds the fin holding portion 17 between itself and the fin portion 132, preventing the fin holding portion 17 from being unintentionally detached.

The power supply unit 16 converts the power supplied from the outside to control the lighting of the light-emitting unit 11, and is disposed opposite the surface of the top plate unit 15 on the upward direction Z1 side, and is fixed to the connecting unit 14. The power supply unit 16 is disposed so that its longitudinal direction is aligned with the depth direction Y. The power supply unit 16 has a power supply main unit 161 and a wire cover unit 162.

The power supply main body 161 has a long box shape, and includes a primary power supply line section 1611 , a secondary power supply line section 1612 , and a power supply leg section 1613 .
A light emitting circuit section (not shown) is housed inside the power supply main body section 161. This light emitting circuit section is supplied with power from an external power source such as a commercial power source via a primary power supply line section 1611, converts the supplied power into a current required for lighting the light emitting section 11, and supplies the current to the light emitting section 11 via a secondary power supply line section 1612.
The primary electric wire portion 1611 and the secondary electric wire portion 1612 are disposed so as to protrude from the side surface on the forward direction Y1 side of the power supply main body portion 161. The tip of the secondary power supply line portion 1612 is disposed on the circuit board 112 side via the top plate cutout portion 1522 and the base electric wire insertion portion 1311c, and is connected to an electronic component (not shown) of the circuit board 112 to supply converted electric power.
The power supply legs 1613 are used to fix the power supply device 16 to the connecting portion 14. They are provided on both ends of the power supply main body 161 in the depth direction Y, and are fixed to the connecting portion 14 together with the top plate portion 15 by the top plate fixing members 50.

The power supply cover part 162 covers the secondary power supply line part 1612 of the power supply main body part 161, and has a box shape with two openings. By covering the secondary power supply line part 1612 with the power supply cover part 162, the power supply part 16 can prevent the secondary power supply part 1612 from being exposed to the outside.

The fin holder 17 serves to prevent the heat dissipation fins 1320 from vibrating, and is attached so as to be hooked onto the heat dissipation fins 1320 .
The fin protection portion 17 is formed by bending a linear steel material, and has a fin hook portion 171 and a fin holding portion 172 .

The fin hook portion 171 is disposed so as to face the plate-shaped surface of the heat dissipation fin 1320 , and is disposed so as to be hooked from the fin cutout portion 1326 to the fin recess portion 1325 of the heat dissipation fin 1320 .
The fin hook portion 171 has a hook protrusion 1711 that is hooked onto the fin cutout portion 1326, and a hook extension portion 1712 that is provided so that the overall length of the fin hook portion 171 can be extended or contracted. The fin hook extension portion 1712 is bent so as to be in a Z shape.

The fin pressing portion 172 is adapted to press and hold two adjacent fin portions 13 from the upward direction Z1, and has two pressing horizontal portions 1721 and three pressing vertical portions 1722.
The pressing horizontal portion 1721 is arranged to cover the upper Z1 side ends of the two heat dissipation fins 1320, and is arranged so that its longitudinal length in the horizontal direction XY is the length between the two heat dissipation fins 1320.
The pressing vertical portion 1722 is provided so as to protrude downward in the Z2 direction from the end portion of the pressing horizontal portion 1721 and is provided so as to abut against the plate surface of the heat dissipation fin 1320.
The fin holding portion 17 forms a U-shape by the fin holding portion 172 and a part of the fin hook portion 171, holds the fin portion 13 from the upward Z1 side, connects adjacent heat dissipation fins 1320 on the upward Z1 side, and structurally connects adjacent heat dissipation fins 1320 on the upward Z1 side. Note that at this time, a part of the fin hook portion 171 plays the same role as the pressing vertical portion 1722, and may be called the pressing vertical portion 1722.

The arm 20 is a member for fixing the lighting device 1 to the mounting portion, and has an arm main part 21 that abuts against the mounting portion, and an arm support part 22 that holds the light source unit 10. The arm 20 is formed integrally by processing each part of the arm main part 21 and the arm support part 22 from a plate-shaped metal material, and is made of a strong metal material such as iron or stainless steel.

The arm main portion 21 is formed in a rectangular shape that is long in the width direction X, and is provided with a pair of main portion through holes 211 into which suspension bolts, which are fixing fittings, are inserted.
The main portion through hole 211 is provided at a position facing the base portion 13 when the arm 20 is attached to the light source unit.
The main part through hole 211 has a first main part through hole 2111 and a second main part through hole 2112. The first arm main part through hole 2111 is formed on the right direction X1 side from the center in the width direction X of the arm main part 21. The first main part through hole 2111 has a shape combining an elongated hole extending in the width direction X and a circular hole.
The second arm main through hole 2112 is formed on the left direction X2 side of the center in the depth direction X of the arm base 21. The second main through hole 2112 is an elongated hole extending in the depth direction Y.
The lighting device 1 is fixed to the mounting portion by inserting a suspension bolt into the main portion through hole 211 and sandwiching the arm main portion 21 between the mounting portion and a nut that screws onto the suspension bolt. Note that although the first main portion through hole 2111 and the second main portion through hole 2112 have been described as having different shapes, they may have the same shape.

The arm support portions 22 are formed in a pair so as to protrude downward in the Z2 from both ends in the width direction X of the arm main portion 21.
The arm support portion 22 has an arm connection portion 223 formed in a disk shape on the end side in the downward direction Z2. The arm connection portion 221 is provided with an arm insertion hole 2211 having a round hole shape.
The arm connection portion 221 is a portion that is connected to the coupling portion 14 of the light source unit 10 by the connection member 30. The arm connection portion 221 abuts and connects to the pillar main portion 141 of the coupling portion 14 by fastening the connection member 30 to the pillar connection portion 1411 in a state where the connection member 30 is inserted into the arm insertion hole 2211.

The arm 20 holds the light source unit 10 by sandwiching it in the width direction X with the arm support portion 22. The arm 20 holds the light source unit 20 so that it does not rotate by tightening the connection member 30 into the connection portion 1411 so that the arm connection portion 221 presses the column main portion 1411 of the first connecting portion 1401. Then, the arm 20 holds the light source unit 20 so that it can rotate in the depth direction Y by loosening the tightening of the connection portion 1411 of the connection member 30.

The connecting member 30 is in the shape of a bolt and includes a cylindrical threaded portion 31 and a head portion 32 provided on one end side of the threaded portion 31 .
The screw portion 31 is cylindrical and has a threaded outer periphery, and is fastened to the connecting portion 1413 .
The head 32 has a hexagonal column shape formed with a diameter larger than that of the screw-in portion 31. When the screw-in portion 31 is tightened into the connection portion 1413, the head 32 presses the arm connection portion 223 against the column main portion 1411 with the surface on the screw-in portion 32 side.
The head 32 may be a polygonal column shape instead of a hexagonal shape, and may be provided with a recess into which a tool such as a screwdriver can be inserted.
In addition, the head portion 32 of the connecting member 30 may be configured to press the column main portion 144 via a washer or the like.

This concludes the description of the configuration of each part of the lighting device 1. Next, the function of the fin protection part 17 in suppressing damage to the fin part 132 will be described with reference to Figs.
Fig. 15 is a perspective view showing a part of the heat sink unit 13 in which the fin holder 17 is attached to the fin portion 132. Fig. 16 is a perspective view of the heat sink unit 13 shown in Fig. 15 as viewed from the direction indicated by the arrow B.

First, the state in which the fin holder 17 is attached to the fin portion 132 will be described.
The fin holding portion 17 is attached to the fin portion 132 such that the hook protrusion 1711 of the fin hook portion 171 is hooked onto the downward Z2 side of the heat dissipation fin 1320 via the fin cutout portion 1326 of the heat dissipation fin 1320. The fin pressing portion 172 is disposed such that the pressing horizontal portion 1721 covers the fin recess 1325 from the upward Z1 side and the pressing vertical portion 1722 and a part of the fin hook portion 171 sandwich the first heat dissipation fin 1322 and the second heat dissipation fin 1323 from the outside in the horizontal direction XY.
By attaching the fin holding portion 17 to the fin portion 13 , the upward Z<b>1 sides of the first heat dissipation fin 1322 and the second heat dissipation fin 1323 are structurally connected via the pressing horizontal portion 1721 .

Next, the effect of the fin holder 17 in preventing damage to the fin portion 132 will be described.
The illumination device 1 may vibrate unintentionally due to an external load being applied to the illumination device 1 or air flowing between the plurality of heat dissipation fins 1320. In this case, the heat dissipation fin 1320 may vibrate so that the upward Z1 side rotates around the downward Z2 side connected to the fin fixing portion 1321 as an axis. This vibration may cause a load to be applied to the downward Z2 side, which is the axis of vibration, of the heat dissipation fin 1320, which may be damaged.
By attaching the fin holding portion 17 , the upward Z 1 sides of the first heat dissipation fin 1322 and the second heat dissipation fin 1323 are structurally connected via the pressing horizontal portion 1721 .
Therefore, the first heat dissipation fin 1322 and the second heat dissipation fin 1323 support each other against the load, and by preventing the end side of the heat dissipation fin 1320 on the upward Z1 side from moving freely, vibration of the heat dissipation fin 1320 can be suppressed, and damage to the heat dissipation fin 1320 can be prevented.

In the lighting device 1 of the present disclosure, the lighting device 1 is provided with a fin holding portion 17 arranged to cover the upward Z1 side ends of two adjacent heat dissipation fins 1320 from the upward Z1 side, and this fin holding portion 17 is attached to the fin portion 132 so as to connect the upward Z1 side ends of the two heat dissipation fins 1320, so that the two heat dissipation fins 1320 are structurally connected on the upward Z1 side.
This prevents the end of the heat dissipating fin 1320 on the upward Z1 side from moving freely, thereby preventing the heat dissipating fin 1320 from being damaged.

The lighting device 1 of the present disclosure has a fin hook portion 171 by which the fin holding portion 17 is hooked from the fin recess 1325 to the fin cutout portion 1326 of the heat dissipation fin 1320, and this fin hook portion 171 has a hook extension portion 1712 that is bent so that it can expand and contract along the length from the fin recess 1325 to the fin cutout portion 1326.
Therefore, even if there is variation in the dimensions of the fin portion 132 during manufacturing, the fin hook portion 171 can be hooked onto the heat dissipation fin 1320 by the hook extension/contraction portion 1712 deforming, and the fin holding portion 17 can be attached to the fin portion 13 .

In the lighting device 1 of the present disclosure, the fin holder 17 is housed in the fin recess 1325 of the heat dissipation fin 1320, and is attached to the heat sink portion 13 without interfering with the top plate portion 15.

In this embodiment, a configuration in which one fin holding portion 17 covers two fin portions 132 has been described, but a configuration in which one fin holding portion 17 covers one fin portion 132 or a configuration in which three or more fin portions 132 are covered may also be used.

In this disclosure, the heat sink section 13 has been described as having the fins 132 arranged in a spiral shape relative to the base center section 1310, but they may also be arranged radially relative to the base center section 1310, or arranged side by side in the width direction X and depth direction Y.

Although the lighting device has been described above as an embodiment of the present invention, the above embodiment is merely an example of a lighting device for embodying the technical concept of the present invention, and does not limit the present invention to these. The present invention is equally applicable to other embodiments, such as modifications to the respective embodiments and examples, or combinations of these.

1 Lighting device, 10 Light source unit, 11 Light emitting portion, 111 Light emitting element, 112 Board, 1121 Mounting surface, 113 Board terminal, 12 Cover portion, 121 Cover main portion, 122 Cover flange portion, 123 Cover through hole, 13 Heat sink portion, 131 Base portion, 1310 Base center portion, 1311 Base main portion, 1311a Light source mounting portion, 1311b Fin mounting portion, 1311c Base electric wire insertion portion, 1312 Base flange portion, 1312a Flange main body portion, 1312b Fitting portion, 132 Fin portion, 1321 Fin fixing portion, 1320 Heat dissipation fin, 1322 First heat dissipation fin, 1323 Second heat dissipation fin, 1324 Fin convex portion, 1325 Fin concave portion, 1326 Fin cutout portion, 14 Connection portion, 141 Column main portion, 1411 Column connection portion, 1412 Part mounting hole, 142 Column side portion, 143 Base fixing portion, 1431 Connection portion fixing portion, 144 Cover holding portion, 1441 Holding vertical portion, 1442 Holding horizontal portion, 145 Top plate mounting portion, 1451 Top plate fixing portion, 15 Top plate portion, 150 Top plate center portion, 151 Top plate main portion, 1510 Top plate pressing portion, 1511 Top plate opening portion, 1512 Top plate claw portion, 1512a Claw protruding portion, 1512b Claw support portion, 1513 Top plate protruding portion, 1514 Top plate slit portion, 152 Top plate connecting portion, 1521 Top plate through hole, 1522 Top plate cutout portion, 16 Power supply unit, 161 Power supply body, 1611 primary power line, 1612 secondary power line, 1613 power supply leg, 162 wire cover, 17 fin holder, 171 fin hook, 1711 hook protrusion, 1712 hook extension, 172 fin holder, 1721 horizontal holder, 1722 vertical holder, 20 arm, 21 arm main, 211 main through hole, 2111 first main through hole, 2112 second main through hole, 22 arm support, 221 arm connection, 2211 arm insertion hole, 30 connection member, 31 screw portion, 32 head, 40 cover connection member, 50 top plate fixing member, 70 light source unit, 71 fin protection section.

Claims (5)

a light emitting section in which a light emitting element is mounted on a substrate;
a heat sink having a plate-like base portion on one surface of which the light emitting portion is attached, and two heat dissipation fins protruding from the other surface of the base portion in a plate-like shape;
a fin holder arranged to connect the end portions of the two heat dissipation fins in the protruding direction;
Equipped with
The two heat dissipation fins are arranged such that one surface of each plate faces each other,
the fin holding portion has a fin pressing portion that covers the end sides of the two heat dissipation fins from the protruding direction side,
The fin pressing portion of the lighting device has a horizontal pressing portion that is arranged to connect the two heat dissipation fins in a direction intersecting the protruding direction, and a vertical pressing portion that protrudes from the horizontal pressing portion so as to abut against the other surface of the heat dissipation fin . The fin holding portion is
The lighting device according to claim 1 , further comprising a fin hook portion that protrudes from the fin pressing portion toward the base portion and is hooked onto an end portion of the heat dissipating fin on the side of the base portion. The lighting device according to claim 2 , wherein the fin hook portion has an expandable hook portion that is bent so that a length between the fin pressing portion and the end portion of the heat dissipating fin on the base portion side can be expanded or contracted. The lighting device according to claim 1 , wherein the fin holding portion is formed by bending a linear steel material. a top plate portion that covers the heat sink from the protruding side,
The lighting device according to claim 1 , wherein the fin holder is disposed between the top plate and an end of the heat dissipation fin in a protruding direction.