lighting equipment

Abstract

To provide an illuminating device that comprises a top plate that can be easily attached to heat dissipation fins, and can restrain vibration and damage of the heat dissipation fins.SOLUTION: An illuminating device comprises: a light emitting part in which light emitting elements are mounted on a board; a heat sink part comprising a base part formed in a plate shape, and of which one surface is fitted with the light emitting part, and first heat dissipation fins and second heat dissipation fins protruded in a first direction from the other surface of the base part; and a top plate part attached to the heat sink part so as to cover the first heat dissipation fins and the second heat dissipation fins. The top plate part comprises claw parts fitted between the first heat dissipation fins and the second heat dissipation fins to press the first heat dissipation fins and the second heat dissipation fins from a second direction intersecting with the first direction.SELECTED DRAWING: Figure 11

Description

[Technical Field]

[0001] The present disclosure relates to a lighting device with a heat sink. [Background technology]

[0002] BACKGROUND ART Conventionally, there are lighting devices that use a heat sink to dissipate heat from a light source (see, for example, Patent Document 1).

[0003] In the lighting device described in Patent Document 1, the heat sink has multiple heat dissipation fins. The heat dissipation fins are formed by pressing a metal plate into a U-shape, and the central portion is attached to a base plate so that the two upper ends are free ends. The heat dissipation fins are arranged radially from the center of the base plate and extend in the radial direction of the base plate. The lighting device also has a fin cover that covers the heat sink. The underside of the fin cover has multiple triangular grooves. The free ends of the heat dissipation fins fit into the triangular grooves of the fin cover to restrict vibration of the heat dissipation fins. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2020-170725 Summary of the Invention [Problem to be solved by the invention]

[0005] In the lighting device described in Patent Document 1, the heat dissipation fins are formed by bending inexpensive, lightweight metal sheets into a U-shape. As a result, the heat dissipation fins have low strength and may vibrate and be damaged by external forces such as wind.

[0006] Therefore, the lighting device described in Patent Document 1 is provided with a fin cover having grooves into which the free ends of the heat dissipation fins fit. However, because the heat dissipation fins are bent into a U-shape, the free ends of the fins are unstable and tend to move, causing the U-shape to expand outward in a V-shape. This results in uneven distances between the fins. As a result, attaching the fin cover by fitting each free end of the fins into the equally spaced grooves of the fin cover is laborious and difficult.

[0007] Furthermore, if the upper ends of the fins come out of the grooves in the fin cover due to vibrations of the lighting device while it is in use, the distance between the fins will become uneven again. In this case, the airflow through the fins will vary from place to place, causing differences in air pressure. This will cause the fins to vibrate and potentially be damaged.

[0008] The present disclosure has been made to solve such problems, and aims to provide a lighting device equipped with a top plate that can be easily attached to heat dissipation fins and that can suppress vibration and damage to the heat dissipation fins. [Means for solving the problem]

[0009] The lighting device according to the present disclosure includes a heat sink portion having a light-emitting portion in which light-emitting elements are mounted on a substrate, a plate-shaped base portion on one surface of which the light-emitting portion is attached, and first and second heat-dissipating fins protruding in a first direction from the other surface of the base portion, and a top plate portion attached to the heat sink portion so as to cover the first and second heat-dissipating fins, wherein the top plate portion is fitted between the first and second heat-dissipating fins and has claw portions that press against the first and second heat-dissipating fins from a second direction intersecting the first direction, and the claw portions are arranged at regular intervals. and only one of the first heat dissipation fins is provided between one of the first heat dissipation fins and one of the adjacent second heat dissipation fins. It is something. [Effects of the Invention]

[0010] In the lighting device according to the present disclosure, the top plate attached to the heat sink is fitted between the first and second heat dissipation fins and has claws that press against the first and second heat dissipation fins from a second direction intersecting the first direction in which the first and second heat dissipation fins protrude. Because the distance between the first and second heat dissipation fins is greater than that of conventional grooves, it is easy to insert the claws between the first and second heat dissipation fins. This makes it easy to attach the top plate to the heat dissipation fins and suppresses vibration and damage to the heat dissipation fins. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a perspective view showing a configuration of an illumination device 1 according to a first embodiment. [Figure 2] 2 is an exploded perspective view of the lighting device 1 shown in FIG. 1 as viewed from the downward direction Z2. [Figure 3] 2 is an exploded perspective view of the lighting device 1 shown in FIG. 1 as viewed from the upper Z1 direction. [Figure 4] FIG. 3 is a perspective view of the heat sink part 13 shown in FIG. 2. [Figure 5] FIG. 5 is a perspective view of a base portion 131 of the heat sink portion 13 shown in FIG. [Figure 6] FIG. 5 is a perspective view of a fin portion 132 shown in FIG. [Figure 7] 5 is a plan view of the heat sink portion 13 shown in FIG. 4 as viewed from the upward direction Z1. [Figure 8] FIG. 3 is a perspective view of the connecting portion 14 shown in FIG. 2. [Figure 9] FIG. 3 is a plan view of the top panel portion 15 shown in FIG. [Figure 10] FIG. 2 is a perspective view of the arm 20 shown in FIG. [Figure 11] 4. FIG. 10 is a perspective view showing how the top plate 15 shown in FIG. 9 is attached to the heat sink 13 shown in FIG. [Figure 12]5 is a perspective view of a fin fixing portion 1321 of the fin portion 132 of the heat sink portion 13 shown in FIG. [Figure 13] 5 is a side view of the fin portion 132 of the heat sink portion 13 shown in FIG. 4 as viewed from the radial direction. [Figure 14] 3 is a plan view of the top panel portion 15 shown in FIG. 2 as viewed from the downward direction Z2. [Figure 15] 15 is an enlarged perspective view of a first claw portion 1512 and a second claw portion 1513 of the top panel portion 15 shown in FIG. [Figure 16] 10 is an enlarged side view of a first claw portion 1512 of the top panel portion 15 shown in FIG. [Figure 17] 10 is an enlarged side view of a second claw portion 1513 of the top panel portion 15 shown in FIG. [Figure 18] 10 is a plan view showing the installation positions and installation angles of first claws 1512 and second claws 1513 of top panel 15 shown in FIG. 9. FIG. [Figure 19] FIG. 19 is a partially enlarged plan view of FIG. [Figure 20] FIG. 19 is a partially enlarged plan view of FIG. [Figure 21] FIG. 12 is a diagram schematically illustrating a portion enclosed by a frame B in FIG. [Figure 22] FIG. 12 is a diagram schematically illustrating a portion enclosed by a frame B in FIG. [Figure 23] FIG. 12 is a diagram schematically illustrating a portion enclosed by a frame B in FIG. [Figure 24] 12 is a diagram showing a schematic view of only one fin portion 132 in the portion enclosed by the frame B in FIG. [Figure 25] 12 is a diagram showing a schematic view of only one fin portion 132 in the portion enclosed by the frame B in FIG. [Figure 26] 4. FIG. 10 is a side view showing how the top plate portion 15 shown in FIG. 9 is attached to the heat sink portion 13 shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, embodiments of a lighting device according to the present disclosure will be described with reference to the drawings. The present disclosure is not limited to the following embodiments, and various modifications are possible without departing from the spirit and scope of the present disclosure. Furthermore, the present disclosure includes all possible combinations of configurations shown in the following embodiments and their modifications. In addition, in each drawing, components with the same reference numerals are identical or equivalent, and this is common throughout the entire specification. Note that in each drawing, the relative dimensional relationships or shapes of each component may differ from those in reality.

[0013] Embodiment 1 The lighting device according to the present disclosure includes a heat sink, and suppresses vibration and damage to the heat dissipation fins of the heat sink.

[0014] Hereinafter, as an embodiment of the present disclosure, a lighting device 1 that is attached to an attachment portion such as a ceiling will be described.

[0015] In the following description, terms indicating directions are used as appropriate, but these terms are for the purpose of explanation and do not limit the lighting device. Examples of terms indicating directions include "up," "down," "right," "left," "front," and "rear." In the drawings described below, the Z axis indicates the up-down direction, the X axis indicates the left-right direction (i.e., width direction), and the Y axis indicates the front-rear direction (i.e., depth direction). The X, Y, and Z axes are perpendicular to each other, with the X and Y axes being horizontal directions and the Z axis being vertical (e.g., vertical direction). These terms are used for convenience of explanation and do not limit the arrangement or orientation of the device, components, etc. The Z direction may be referred to as the "first direction," and the X and Y directions may be referred to as the "second direction."

[0016] [Configuration of lighting device 1] The configuration of each part of the lighting device 1 will be described with reference to FIGS. 1 to 10. FIG. 1 is a perspective view showing the configuration of the lighting device 1 according to embodiment 1. FIG. 2 is an exploded perspective view of the lighting device 1 shown in FIG. 1, viewed from the downward Z2 direction. FIG. 3 is an exploded perspective view of the lighting device 1 shown in FIG. 1, viewed from the upward Z1 direction. FIG. 4 is a perspective view of the heat sink 13 shown in FIG. 2. FIG. 5 is a perspective view of the base 131 of the heat sink 13 shown in FIG. 4. FIG. 6 is a perspective view of the fin 132 shown in FIG. 4. FIG. 7 is a plan view of the heat sink 13 shown in FIG. 4, viewed from the upward Z1 direction. FIG. 8 is a perspective view of the connecting portion 14 shown in FIG. 2. (a) of FIG. 8 is a perspective view seen from the left X2 direction, and (b) of FIG. 8 is a perspective view seen from the right X1 direction. FIG. 9 is a plan view of the top plate 15 shown in FIG. 2. Fig. 9(a) shows the top panel 15 as viewed from the upward direction Z1, and Fig. 9(b) shows the top panel 15 as viewed from the downward direction Z2. Fig. 10 is a perspective view of the arm 20 shown in Fig. 1.

[0017] The lighting device 1 includes a light source unit 10, an arm 20 that is attached to a mounting portion such as a ceiling, and a connecting member 30 that connects the light source unit 10 to the arm 20. The light source unit 10 is attached to the arm 20 by the connecting member 30, and is held rotatably in the depth direction Y with respect to the arm 20 around the connecting member 30 as an axis.

[0018] As shown in FIG. 2, 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 panel section 15, and a power supply device 16.

[0019] 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 circular, flat electronic substrate. A plurality of light-emitting elements 111 are mounted on a mounting surface 1121, which is one surface of the substrate 112. The substrate 112 is also provided with wiring conductors (not shown) that are electrically connected to electrodes of the plurality of light-emitting elements 111. The substrate 112 is also provided with a power supply board terminal 113 on one end side. The board terminal 113 is connected to a secondary power line portion 1612 of the power supply device 16 to receive power supply from the power supply device 16.

[0020] The cover part 12 is made of a transparent material and protects the light emitting part 11. The cover part 12 is attached to the base part 131 of the heat sink part 13 (see FIG. 4) so ​​as to cover the light emitting part 11. The cover part 12 has a box-shaped cover main part 121 that is open on the upward 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 122 to fix the cover part 12 to the base part 131. 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 11, for controlling the light from the light emitting element 111 to have a predetermined light distribution.

[0021] The light emitting unit 11 is attached to the heat sink unit 13. Heat generated when the light emitting unit 11 emits light is transferred to the heat sink unit 13. The heat sink unit 13 dissipates the transferred heat. As shown in Fig. 4, the heat sink 13 has a base 131 and a fin 132. The base 131 and the fin 132 are each formed by processing a plate-shaped metal member. The metal member is, for example, aluminum, which has good heat dissipation properties and is lighter than iron. By using aluminum, the heat sink 13 can be made lighter and its heat dissipation properties can be improved.

[0022] 5, the base portion 131 has a base main portion 1311 and a base flange portion 1312. The base portion 131 is formed by bending a plate made of a material such as aluminum that has good heat dissipation properties and is lighter than iron, for example, by press working.

[0023] The light emitting unit 11 is attached to the base main portion 1311. The base main portion 1311 is a plate-like metal member formed into a rectangular shape. 2, one surface (the surface on the downward Z2 side) of the base main part 1311 is a light source attachment part 1311a that holds the light emitting part 11. Also, the other surface (the surface on the upward Z1 side) of the base main part 1311 is a fin attachment part 1311b as shown in FIG. As shown in FIG. 2, the light emitting unit 11 is attached to the light source attachment portion 1311a so that the surface of the light emitting unit 11 opposite to the mounting surface 1121 of the substrate 112 abuts against the light source attachment portion 1311a. As shown in FIG. 3, the fin portion 132 is attached to the fin attachment portion 1311b. 5, the base main part 1311 is provided with a base electric wire insertion part 1311c. The base electric wire insertion part 1311c is a through-hole that passes through the base main part 1311 in the up-down direction Z, and the secondary power line part 1612 of the power supply device 16 is inserted through the base electric wire insertion part 1311c. When the light emitting part 11 is arranged on the base main part 1311, the base electric wire insertion part 1311c is provided adjacent to the end part of the light emitting part 11 on the side where the board terminal 113 is arranged.

[0024] 5, the base flange 1312 is a portion that protrudes downward in the Z2 direction from each side of the rectangular 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 1312 has a flange main body 1312a and a fitting portion 1312b. Two flange main bodies 1312a are arranged with a gap between them on each side of the base main portion 1311. The fitting portion 1312b is a portion formed by the gap between the two flange main bodies 1312a, and is a recess into which a holding vertical portion 1441 (see FIG. 8) of the connecting portion 14, which will be described later, is fitted. Furthermore, since the base flange portion 1312 protrudes downward in the Z2 direction, accumulation of dust or water such as rainwater and condensation water on the base main portion 1311 can be suppressed compared to when it protrudes upward in the Z1 direction.

[0025] As shown in FIG. 4, a plurality of fin portions 132 are arranged on the fin mounting portion 1311b of the base portion 131. As shown in FIG. 7, the fin portions 132 are arranged in a spiral shape around a base central portion 1310, which is the center of the fin mounting portion 1311b. As shown in FIG. 6, the fin portion 132 is formed by bending a plate-like metal plate into a U-shape. The fin portion 132 has a fin fixing portion 1321 in the center of the U-shape, 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 are each connected to the fin fixing portion 1321. The fin fixing portion 1321 is fixed to the fin mounting portion 1311b of the base portion 131. The first heat dissipation fin 1322 and the second heat dissipation fin 1323 extend in a first direction from the base main portion 1311. That is, the first heat dissipation fins 1322 and the second heat dissipation fins 1323 extend in a direction intersecting the base main portion 1311. The first heat dissipation fins 1322 and the second heat dissipation fins 1323 are, for example, provided to protrude in the upward direction Z1 so as to be perpendicular to the base main portion 1311. The first heat dissipation fins 1322 and the second heat dissipation fins 1323 may be collectively referred to as heat dissipation fins 1320. As shown in FIG. 7, the fin portions 132 are arranged side by side in the circumferential direction around the base central portion 1310, and are arranged so as to intersect with a straight line L (see FIG. 20) extending radially from the base central portion 1310. That is, the fin portions 132 are arranged so as to be inclined at a predetermined angle ε (see FIG. 20) with respect to the straight line L extending radially from the base central portion 1310. Note that, as shown in FIG. 7, the fin portions 132 are not arranged around the base central portion 1310 of the fin attachment portion 1311b. Therefore, a space where the fin portions 132 are not arranged is provided on the upward Z1 side around the base central portion 1310. This improves the heat dissipation performance of the heat sink portion 13.

[0026] The multiple fin portions 132 are arranged with a gap between adjacent fin portions 132 in the circumferential direction. That is, as schematically shown in FIG. 21 (described later), when one of two adjacent fin portions 132 is a first fin portion 132 and the other is a second fin portion 132, the first fin portion 132 and the second fin portion 132 are arranged with a gap between them. Therefore, the second heat dissipation fin 1323, which is a plate-shaped surface of the first fin portion 132, is arranged opposite the first heat dissipation fin 1322 of the second fin portion 132. In this way, the second heat dissipation fin 1323 of each fin portion 132 is arranged opposite the first heat dissipation fin 1322 of the adjacent fin portion 132. Similarly, the first heat dissipation fin 1322 of each fin portion 132 is arranged opposite the second heat dissipation fin 1323 of the adjacent fin portion 132. The multiple fin sections 132 are arranged in the horizontal direction XY with spaces provided between them and other fin sections 132 that face each other in the radial direction across the base central section 1310, which is the center of the fin attachment section 1311b. When describing the shape of the fin section 132, the side facing the base central section 1310 will be referred to as the inner peripheral section, and the side opposite the base central section 1310 will be referred to as the outer peripheral section.

[0027] 7 and 12, which will be described later, the fin fixing portion 1321 of the fin portion 132 is formed in a trapezoidal shape and is fixed to the fin attachment portion 1311b by a fixing member such as a screw, by crimping, etc. The width W of the fin fixing portion 1321 gradually decreases from the outer periphery toward the inner periphery.

[0028] As shown in FIG. 6, the first heat dissipation fin 1322 and the second heat dissipation fin 1323 are provided so as to protrude in the upward direction Z1 from opposite sides of the fin fixing portion 1321, respectively. 6, the second heat dissipation fins 1323 are formed so that the length L2 thereof in the horizontal direction XY is shorter than the length L1 of the first heat dissipation fins 1322. By forming the second heat dissipation fins 1323 so that the length L2 thereof is shorter than the length L1 of the first heat dissipation fins 1322, when the fin portion 132 is arranged on the base portion 131, the spacing between adjacent fin portions 132 in the circumferential direction on the side of the base center portion 1310 can be made wider. Therefore, an air flow path can be secured on the side of the base center portion 1310.

[0029] The fin portion 132 has fin protrusions 1324 provided on first heat dissipation fins 1322. The fin protrusions 1324 are inserted into later-described top plate openings 1511 (see FIG. 9 ) of the top plate portion 15. The fin protrusions 1324 are provided so as to protrude in the upward direction Z1 from upper ends 1325, which are the sides of the first heat dissipation fins 1322 on the upward Z1 side. The fin protrusions 1324 are provided so as to be arranged circumferentially about the base central portion 1310 when the multiple fin portions 132 are arranged on the base portion 131.

[0030] 6 and 12, in the fin portion 132, the length L5 of the lower end portion 1320a of the second heat dissipation fin 1323 is longer than the length L6 of the fin fixing portion 1321 in the horizontal direction XY. Therefore, as shown in FIG. 7, the lower end portion 1320a of the second heat dissipation fin 1323 is formed so as to protrude in the direction from the base central portion 1310 toward the base flange portion 1312. In addition, the length L1 of the lower end portion 1320a of the first heat dissipation fin 1322 is also formed so as to protrude in both the direction from the base central portion 1310 toward the base flange portion 1312 and the direction toward the base central portion 1310. Therefore, as shown in FIG. 7, the lower end portion 1320a of the first heat dissipation fin 1322 is formed so as to protrude in both the direction from the base central portion 1310 toward the base flange portion 1312 and the direction toward the base central portion 1310.

[0031] 2 and 3, 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 arranged so as to face each other in the width direction X and the depth direction Y of the light source unit 10. As shown in FIG. 8, the connecting portion 14 has a pillar main portion 141, a pillar side portion 142, a base fixing portion 143, a cover holding portion 144, and a top plate placing portion 145. 3, the connecting portion 14 is formed so that the length L3 (see FIG. 8) from the base fixing portion 143 to the top plate mounting portion 145 in the vertical direction Z is the same as the length L4 (see FIG. 4) of the heat dissipation fin 1320 protruding from the fin mounting portion 1311b. In other words, the length L3 of the connecting portion 14 in the vertical direction Z is formed so that the end portion 1320b of the heat dissipation fin 1320 on the upper direction Z1 side and on the outer periphery side abuts against the top plate portion 15 when the top plate portion 15 is attached to the connecting portion 14. Note that, compared to base portion 131, connecting portion 14 may be configured using a metal member having greater strength than base portion 131. In this case, connecting portion 14 is configured from, for example, iron or stainless steel. Alternatively, connecting portion 14, like base portion 131, can be made of a material with high thermal conductivity, such as aluminum, to improve heat dissipation capability.

[0032] The column main portion 141 has a rectangular plate shape and is disposed so as to protrude upward in the Z1 direction from the base main portion 1311. The column main section 141 has a column connection section 1411 to which the connection member 30 is connected. In Fig. 8(a), 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 X2, which is the inside, and has an opening that penetrates 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.

[0033] The pillar side portions 142 are formed on both sides of the pillar main portion 141 in the depth direction Y, and in FIG. 8, protrude from the outside, which is the right direction X1 side, to the inside, which is the left direction X2 side.

[0034] The base fixing portion 143 is formed on the side edge of the column main portion 141 on the downward Z2 side. Like the column side portion 142, the base fixing portion 143 protrudes from the outside, which is the right direction X1, to the inside, which is the left direction X2, as shown in FIG. 8. The base fixing portion 143 is provided with a connecting portion fixing portion 1431, which is a through-hole that penetrates in the up-down direction Z. A spiral groove is formed on the inner surface of the connecting portion fixing portion 1431. A screw-shaped cover fixing member 40 (see FIGS. 2 and 3) is inserted into the cover through-hole 123, the connecting portion fixing portion 1431, and the base through-hole 1311d from the downward Z2 direction. The cover fixing member 40 is then screwed together, connecting the cover portion 12, the light-emitting portion 11, the heat sink portion 13, and the connecting portion 14 together so as to be integrated.

[0035] The cover holding portion 144 is provided from the side edge on the downward Z2 side 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 1312b (see FIG. 5). The holding horizontal portion 1442 protrudes from the end of the holding vertical portion 1441 on the downward Z2 side from the outside, which is the right direction X1 side, to the inside, which is the left direction X2 in Fig. 8. When the cover portion 12 and the connecting portion 14 are attached to the base portion 131, the holding vertical portion 1441 is disposed on the downward Z2 side of the cover flange portion 122, and prevents the cover portion 12 from falling.

[0036] The tabletop mounting portion 145 is formed on the side edge of the column main portion 141 on the upward Z1 side. Like the column side portion 142 and the base fixing portion 143, the tabletop mounting portion 145 protrudes from the outside, which is the right direction X1 side, to the inside, which is the left direction X2, in FIG. 8. The tabletop portion 15 is mounted on the tabletop mounting portion 145. The tabletop mounting portion 145 is provided with a tabletop fixing portion 1451, which is a through-hole that penetrates in the vertical direction Z. A spiral groove is formed on the inner surface of the tabletop fixing portion 1451, and a screw-shaped tabletop fixing member 50 (see FIGS. 2 and 3) is screwed into it from the upward Z1 direction, connecting the tabletop portion 15 to the connecting portion 14.

[0037] The top plate 15 is provided to prevent dust and the like from accumulating on the heat sink 13, and as shown in FIG. 9, has a top plate main portion 151 and a top plate connecting portion 152. The top plate 15 is formed by pressing a plate material or the like. The top plate 15 is made of a plate material that has good heat dissipation properties and is lighter than steel. The top plate 15 is made of aluminum, for example.

[0038] The top plate main portion 151 is formed in a disk shape and is provided so as to cover the upper end portion 1325 on the upward Z1 side of the fin portion 132. The top plate main portion 151 is provided with a top plate opening 1511, a first claw portion 1512, and a second claw portion 1513. The top plate main portion 151 has a top plate central portion 150 that faces the base central portion 1310 of the heat sink portion 13 in the vertical direction Z. The top plate main portion 151 also has a top plate opening 1511, a first claw portion 1512, and a second claw portion 1513 arranged circumferentially around the top plate central portion 150. The top panel opening 1511, the first claw portion 1512, and the second claw portion 1513 are arranged at regular intervals in the circumferential direction of a concentric circle centered on the base central portion 1310. Furthermore, the top plate opening 1511, the first claw portion 1512, and the second claw portion 1513 are arranged in a radial direction extending radially from the top plate central portion 150, with the top plate opening 1511 being arranged at a position closest to the top plate central portion 150, followed by the second claw portion 1513. The first claw portion 1512 is arranged at a position farthest from the top plate central portion 150.

[0039] The top plate openings 1511 are openings into which the fin protrusions 1324 are inserted, and are elongated oval holes extending along the circumference of a circle centered on the top plate central portion 150. Each top plate opening 1511 is formed so that multiple fin protrusions 1324 can be inserted therein. A plurality of top panel openings 1511 are provided circumferentially around the top panel central portion 150 as the center.

[0040] As shown in Fig. 14, which will be described later, the first claws 1512 and the second claws 1513 are provided so as to protrude from the surface of the top plate main portion 151 on the downward Z2 side. The first claws 1512 and the second claws 1513 each extend in the opposite direction to the protruding direction of the heat dissipation fins 1320 of the heat sink portion 13. That is, the heat dissipation fins 1320 of the heat sink portion 13 extend upward in the Z direction Z1, and the first claws 1512 and the second claws 1513 extend downward in the Z direction Z2. A plurality of the first claws 1512 and the second claws 1513 are provided circumferentially around the top plate central portion 150.

[0041] The tabletop connecting portions 152 fix the tabletop portion 15 to the connecting portion 14, and are provided so as to protrude in the horizontal directions X and Y from each side surface of the tabletop main portion 151. The tabletop connecting portions 152 protrude in pairs from each of the width direction X and the depth direction Y according to the connecting portion 14. The tabletop connecting portions 152 are provided with tabletop through-holes 1521 that are provided so as to penetrate in the up-down direction Z. Of the four tabletop connecting portions 152, the tabletop connecting portion 152 on the rear direction Y2 side is provided with a tabletop cutout portion 1522 that is cut out in an elongated shape from a side portion on the rear direction Y2 side toward the tabletop center portion 150.

[0042] The top panel section 15 has the top panel connecting section 152 placed on the top panel placing section 145 (see FIG. 8) of the connecting section 14. Then, with the top panel through-hole 1521 and the top panel fixing section 1451 in communication with each other, the top panel fixing member 50 (see FIGS. 2 and 3) is inserted into the top panel through-hole 1521 from the upward Z1 side and screwed into the top panel fixing section 1451, thereby fixing the top panel to the connecting section 14.

[0043] The power supply unit 16 converts externally supplied power to control the lighting of the light-emitting unit 11, and is disposed opposite the surface of the top panel 15 in the upward direction Z1, and is fixed to the connecting unit 14. As shown in FIGS. 2 and 3, the power supply unit 16 has an external shape that is a substantially rectangular box. The longitudinal direction of the power supply unit 16 is disposed along the depth direction Y. The power supply unit 16 has a power supply main body 161 and a power supply cover 162.

[0044] The power supply main body 161 has a long box shape and includes a primary power supply line portion 1611 , a secondary power supply line portion 1612 , and a power supply leg portion 1613 . A light-emitting circuit section (not shown) is housed inside the power supply main body section 161. The light-emitting circuit section receives power from an external power source such as a commercial power source via a primary power 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 line section 1612. The primary power supply line portion 1611 and the secondary power supply line portion 1612 are arranged to protrude from the side surface of the power supply main body 161 on the forward direction Y1 side. The tip of the secondary power supply line portion 1612 is arranged on the circuit board 112 side through the top plate cutout portion 1522 and the base electric wire insertion portion 1311c, and is connected to electronic components (not shown) of the circuit board 112 to supply converted electric power. The power supply legs 1613 are used to secure 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.

[0045] The power supply cover part 162 covers the secondary power line part 1612 of the power supply main body part 161, and is shaped like a box with two openings on the top and bottom. By covering the secondary power line part 1612 with the power supply cover part 162, the power supply device 16 can prevent the secondary power line part 1612 from being exposed to the outside.

[0046] 10, the arm 20 has an arm main section 21 that comes into contact with the mounting section, and an arm support section 22 that holds the light source unit 10. The arm 20 is formed such that the arm main section 21 and the arm support section 22 are integrally formed by processing a plate-shaped metal member, and is made of a strong metal member such as iron or stainless steel.

[0047] 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 metal fittings, are inserted. The main portion through-hole 211 is provided at a position facing the base portion 131 when the arm 20 is attached to the light source unit 10. The main portion through hole 211 has a first main portion through hole 2111 and a second main portion through hole 2112 . The first main portion through hole 2111 is formed on the right side in the X1 direction from the center in the width direction X of the arm main portion 21. The first main portion through hole 2111 has a shape that combines an elongated hole extending in the width direction X and a circular hole. The second main portion through hole 2112 is formed on the left direction X2 side of the center in the width direction X of the arm main portion 21. The second main portion through hole 2112 is an elongated hole extending in the depth direction Y. A suspension bolt is inserted into the main part through hole 211, and the arm main part 21 is sandwiched between the mounting part such as a ceiling and a nut onto which the suspension bolt is screwed, thereby fixing the lighting device 1 to the mounting part. Here, we have described the case where the first main portion through hole 2111 and the second main portion through hole 2112 have different shapes, but this is not limited to this case, and the first main portion through hole 2111 and the second main portion through hole 2112 may have the same shape.

[0048] The arm support portions 22 are formed to protrude downward in the Z2 direction from both ends of the arm main portion 21 in the width direction X. The arm support part 22 has an arm connection part 221 formed in a semicircular plate shape at the end in the downward direction Z2. The arm connection part 221 is provided with an arm insertion hole 2211 in the shape of a round hole. The arm connection portion 221 is a portion that is connected to the connecting portion 14 of the light source unit 10 by the connection member 30. With the connection member 30 inserted into the arm insertion hole 2211, the arm connection portion 221 comes into contact with and is connected to the pillar main portion 141 of the connecting portion 14 by fastening the connection member 30 to the pillar connection portion 1411 of the connecting portion 14.

[0049] The arm 20 holds the light source unit 10 between the two arm support parts 22 in the width direction X. The arm 20 can hold the light source unit 10 so that it does not rotate by tightening the connection member 30 into the pillar connection part 1411 so that the arm connection part 221 presses the pillar main part 141 of the coupling part 14. On the other hand, the arm 20 can hold the light source unit 10 so that it can rotate in the depth direction Y by loosening the tightening of the pillar connection part 1411 of the connection member 30. In this way, whether or not the light source unit 10 can rotate can be switched by changing the degree to which the connection member 30 is tightened.

[0050] As shown in FIG. 2, the connecting member 30 has a bolt shape including a cylindrical threaded portion 31 and a head portion 32 provided on one end side of the threaded portion 31. The screw-fitting portion 31 is cylindrical, has a threaded outer periphery, and is fastened to the column connection portion 1411 . The head 32 has a hexagonal column shape formed with a diameter larger than that of the threaded portion 31. When the threaded portion 31 is tightened into the column connection portion 1411, the head 32 presses the arm connection portion 221 against the column main portion 141 with the surface on the threaded portion 31 side. The head 32 may be a polygonal pillar shape instead of a hexagonal pillar shape, and may be provided with a recess into which a tool such as a screwdriver can be inserted. Furthermore, the head portion 32 of the connecting member 30 may be configured to press the column main portion 141 via a washer or the like.

[0051] The above is a description of the configuration of each part of the lighting device 1.

[0052] [Effect of top plate portion 15 on suppressing vibration and damage to fin portion 132] Next, the function of top panel 15 in suppressing vibration and damage to fin 132 of heat sink 13 will be described with reference to FIGS.

[0053] FIG. 11 is a perspective view showing how the top plate 15 shown in FIG. 9 is attached to the heat sink 13 shown in FIG. 4. FIG. 12 is a perspective view of the fin fixing portion 1321 of the fin portion 132 of the heat sink 13 shown in FIG. 4. FIG. 13 is a side view of the fin portion 132 of the heat sink 13 shown in FIG. 4 viewed from the radial direction. FIG. 14 is a plan view of the top plate 15 shown in FIG. 2 viewed from the downward direction Z2. Note that FIG. 14 is upside down in the Z direction compared to FIG. 2. FIG. 15 is an enlarged perspective view of the first claw portion 1512 and the second claw portion 1513 of the top plate 15 shown in FIG. 14. FIG. 16 is an enlarged side view of the first claw portion 1512 of the top plate 15 shown in FIG. 9. FIG. 17 is an enlarged side view of the second claw portion 1513 of the top plate 15 shown in FIG. 9. Fig. 18 is a plan view showing the installation positions and installation angles of first claw portion 1512 and second claw portion 1513 of top panel portion 15 shown in Fig. 9. Figs. 19 and 20 are enlarged plan views of a portion of Fig. 18. Fig. 19 shows the portion enclosed by frame C in Fig. 18.

[0054] As shown in FIG. 11, the top panel 15 is attached to the heat sink 13 in the direction of arrow A.

[0055] As shown in FIG. 14 , the top plate 15 is provided with a plurality of first claws 1512 and a plurality of second claws 1513. As described above, the top plate 15 is made of, for example, sheet metal such as aluminum. The first claws 1512 and the second claws 1513 are formed, for example, by a bending process such as cutting and raising. Cutting and raising is a processing technique in which a cut is made in the sheet metal around a portion to be bent (hereinafter referred to as punching), a die is set on the portion to be bent, and only that portion is bent. When the first claws 1512 and the second claws 1513 are formed by cutting and raising, the first claws 1512 and the second claws 1513 do not need to be formed as separate parts for the top plate 15, and therefore can be formed inexpensively and easily. Furthermore, in the case of cutting and raising, since cuts can be formed using a punching die during punching, it is possible to improve the accuracy of the installation positions and installation angles of first claw portion 1512 and second claw portion 1513. However, this is not limited to this case, and first claw portion 1512 and second claw portion 1513 may be formed as separate parts and joined to top plate portion 15 by welding or the like.

[0056] As shown in FIGS. 15 and 16 , the first claw portion 1512 is formed in a plate shape, and the main surface of the plate shape has a substantially triangular outer shape. The first claw portion 1512 has an amplitude suppression portion 1512a, a guide portion 1512b, a tip portion 1512c, and a root portion 1512d. The root portion 1512d, which is the end portion on the upward direction Z1 side, is connected to the table top main portion 151. The root portion 1512d extends in a direction parallel to the table top main portion 151. The amplitude suppression portion 1512a is connected to the root portion 1512d. The amplitude suppression portion 1512a is provided on both side portions of the first claw portion 1512. The amplitude suppression portion 1512a is a linear portion extending in a direction perpendicular or substantially perpendicular to the table top main portion 151. That is, the amplitude suppression portion 1512a protrudes and extends from the top plate main portion 151 in the downward direction Z2. The guide portion 1512b is an inclined portion connected to the amplitude suppression portion 1512a. The guide portions 1512b are provided on both side portions of the first claw portion 1512. The guide portions 1512b each extend in a direction intersecting with the amplitude suppression portion 1512a. The guide portions 1512b each extend linearly and are inclined at an angle α with respect to the top plate main portion 151. The angle α is, for example, approximately 45° to 75°. The guide portion 1512b is tapered toward the downward direction Z2, i.e., toward the tip portion 1512c. The tip portion 1512c is connected to the guide portion 1512b. The tip portion 1512c is provided at the end of the first claw portion 1512 on the downward direction Z2 side. The tip portion 1512c is a curved portion formed of a curve having one curvature (for example, a circular arc shape) or a curve having multiple curvatures (for example, a shape combining multiple circular arcs).

[0057] As shown in FIGS. 15 and 17 , the second claw portion 1513 is formed in a plate shape, and the main surface of the plate shape has a substantially trapezoidal outer shape. The second claw portion 1513 has an amplitude suppression portion 1513a, a guide portion 1513b, a tip portion 1513c, and a root portion 1513d. The root portion 1513d, which is the end portion on the upward Z1 side, is connected to the table top main portion 151. The root portion 1513d extends in a direction parallel to the table top main portion 151. The amplitude suppression portion 1513a is connected to the root portion 1513d. The amplitude suppression portion 1513a is provided on both side portions of the second claw portion 1513. The amplitude suppression portion 1513a is connected to the root portion 1513d, which is the end portion on the upward Z1 side of the second claw portion 1513. The amplitude suppression portion 1513a is a linear portion extending perpendicular or substantially perpendicular to the table top main portion 151. That is, the amplitude suppression portion 1513a protrudes and extends downward in the Z2 direction from the table top main portion 151. The guide portion 1513b is an inclined portion connected to the amplitude suppression portion 1513a. The guide portions 1513b are provided on both sides of the second claw portion 1513. The guide portions 1513b each extend in a direction intersecting with the amplitude suppression portion 1513a. The guide portions 1513b each extend linearly and are inclined at an angle β with respect to the table top main portion 151. The angle β is, for example, approximately 25° to 50°. The angle β is smaller than the angle α. The guide portions 1513b are tapered downward in the Z2 direction, i.e., toward the tip portions 1513c. The guide portion 1513b is not limited to a straight line, but may be curved. In this case, the guide portion 1513b is configured from a curved portion composed of a curve having one curvature (for example, an arc shape) or curves having multiple curvatures (for example, a shape combining multiple arcs). The tip portion 1513c is connected to the guide portion 1513b. The tip portion 1513c is provided at the end of the second claw portion 1513 on the downward direction Z2 side. The tip portion 1513c is a curved portion composed of a curve having one curvature (for example, an arc shape) or curves having multiple curvatures (for example, a shape combining multiple arcs). The tip portion 1513c may also be a straight line parallel or approximately parallel to the top plate main portion 151.Furthermore, when the length in the Z direction of the first claw portion 1512 is L7 as shown in FIG. 16 and the length in the Z direction of the second claw portion 1513 is L8 as shown in FIG. 17, the length L8 is shorter than the length L7.

[0058] As shown in FIGS. 18 to 20, the fin portion 132 is arranged in a spiral shape around the base central portion 1310 on the fin attachment portion 1311b, which is one surface of the base portion 131. As shown in FIG. 20, the fin portion 132 is arranged at an angle with respect to a radial line L passing through the base central portion 1310. That is, as shown in FIG. 20, the first heat dissipation fin 1322 of the fin portion 132 is arranged at an angle ε with respect to the radial line L passing through the base central portion 1310. As described above, the fin fixing portion 1321 is formed in a trapezoidal shape as shown in FIGS. 7 and 12. Therefore, the width W (see FIG. 7) between the first heat dissipation fin 1322 and the second heat dissipation fin 1323 of one fin portion 132 is not constant but gradually increases in the direction from the base central portion 1310 toward the base flange portion 1312.

[0059] When the top plate 15 is attached to the heat sink 13, the first claws 1512 are disposed between adjacent fins 132 as shown in FIG. 20 . That is, the first claws 1512 are disposed on the outer sides of the U-shaped fins 132. For ease of explanation, one of the adjacent fins 132 will be referred to as the first fin 132, and the other will be referred to as the second fin 132. The first claws 1512 are disposed between the second heat dissipation fin 1323 of the first fin 132 and the first heat dissipation fin 1322 of the second fin 132. The angle formed between the base 1512d of the first claws 1512 and the second heat dissipation fin 1323 of the first fin 132 is defined as γ. The angle γ is approximately 90°. That is, the angle γ is preferably approximately 85° to 110°. When the top plate 15 is attached to the heat sink 13, the amplitude suppressing portions 1512a of the first claws 1512 come into contact with the second heat dissipation fins 1323 of the first fin portion 132 and the first heat dissipation fins 1322 of the second fin portion 132, as schematically shown in FIG. 23 (described later). This causes the amplitude suppressing portions 1512a of the first claws 1512 to press against the second heat dissipation fins 1323 of the first fin portion 132 and the first heat dissipation fins 1322 of the second fin portion 132 from the second direction (i.e., from the right direction X1 and the left direction X2). This restricts vibration of the fin portion 132, thereby suppressing damage to the fin portion 132.

[0060] 20, the second claws 1513 are disposed inside the U-shaped fin portion 132. That is, the second claws 1513 are disposed between the first heat dissipation fin 1322 and the second heat dissipation fin 1323 of one fin portion 132. The angle formed between the root portion 1513d of the second claws 1513 and the first heat dissipation fin 1322 of the fin portion 132 is defined as δ. The angle δ is approximately 90°. That is, the angle δ is preferably approximately 85° to 110°. When the top plate portion 15 is attached to the heat sink portion 13, the amplitude suppressing portions 1513a of the second claws 1513 each come into contact with the first heat dissipation fin 1322 and the second heat dissipation fin 1323 of one fin portion 132, as schematically shown in FIG. 25, which will be described later. As a result, each of the amplitude suppressing portions 1513a of the second claw portions 1513 presses the first heat dissipating fin 1322 and the second heat dissipating fin 1323 of the fin portion 132 from the second direction (i.e., from the right direction X1 and the left direction X2). Therefore, vibration of the fin portion 132 is restricted, and damage to the fin portion 132 is further suppressed.

[0061] [Method of attaching the top plate 15 to the heat sink 13] Next, a method for attaching the top panel 15 to the heat sink 13 will be described with reference to FIGS.

[0062] 21 to 23 are diagrams that schematically show the portion enclosed by frame B in FIG. 11. FIG. 21 shows the state before the top plate 15 is attached to the heat sink 13. FIG. 22 shows the state immediately before the tip 1512c of the first claw 1512 of the top plate 15 comes into contact with the upper end 1325 of the fin 132. FIG. 23 shows the state in which the amplitude suppressing portion 1512a of the first claw 1512 of the top plate 15 comes into contact with the upper end 1325 of the fin 132.

[0063] 24 and 25 are diagrams that schematically show only one fin portion 132 in the portion enclosed by frame B in Fig. 11. Fig. 24 shows a state immediately before tip portion 1513c of second claw portion 1513 of top plate portion 15 comes into contact with upper end portion 1325 of fin portion 132. Fig. 25 shows a state in which amplitude suppressing portion 1513a of second claw portion 1513 of top plate portion 15 comes into contact with upper end portion 1325 of fin portion 132.

[0064] 26 is a side view showing how the top plate 15 shown in FIG. 9 is attached to the heat sink 13 shown in FIG. 4. FIG. 26(a) shows the state just before the tip 1512c of the first claw 1512 of the top plate 15 comes into contact with the upper end 1325 of the fin 132. FIG. 26(b) shows the state just before the tip 1513c of the second claw 1513 of the top plate 15 comes into contact with the upper end 1325 of the fin 132. FIG. 26(c) shows the state in which the top plate 15 is attached to the heat sink 13.

[0065] As described with reference to FIGS. 16 and 17 , the length L7 of the first claw 1512 in the Z direction is greater than the length L8 of the second claw 1513 in the Z direction. Therefore, when attaching the top plate 15 to the fin 132, as shown in FIGS. 26( a) and 26(b), the tip 1512c of the first claw 1512 first abuts against the upper end 1325 of the fin 132. As shown in FIG. 6 , the fin 132 is formed by bending a metal plate into a U-shape, as described above. Therefore, the upper end 1325 of the fin 132 is a free end. As shown in FIG. 21 , before the top plate 15 is attached to the heat sink 13, the free end 1325, which is the upper end, is not restricted from moving in the X direction and therefore tends to gradually spread outward in a V-shape upward Z1. 21, the width W2 between the second heat dissipation fin 1323 of the first fin portion 132 and the first heat dissipation fin 1322 of the second fin portion 132 that are adjacent to each other is narrow. Therefore, as shown in FIG. 22, the tip portion 1512c of the first claw portion 1512 is inserted between the adjacent fin portions 132. That is, the tip portion 1512c of the first claw portion 1512 is inserted between the second heat dissipation fin 1323 of the first fin portion 132 and the first heat dissipation fin 1322 of the second fin portion 132. Because the tip portion 1512c is formed in a smooth curved shape as shown in FIG. 16, the tip portion 1512c can be smoothly inserted between the adjacent fin portions 132. Thereafter, as the first claw portion 1512 is further inserted between the adjacent fin portions 132, the width W2 between the adjacent fin portions 132 gradually increases due to the insertion pressure of the guide portion 1512b, which is the tapered inclined portion of the first claw portion 1512. As a result, the width W2 between the second heat dissipation fin 1323 of the adjacent first fin portion 132 and the first heat dissipation fin 1322 of the adjacent second fin portion 132 increases. Thereafter, the first claw portion 1512 is further inserted between the adjacent fin portions 132. Then, as shown in FIG. 23 , the amplitude suppressing portion 1512a of the first claw portion 1512 abuts against the second heat dissipation fin 1323 of the adjacent first fin portion 132 and the first heat dissipation fin 1322 of the adjacent second fin portion 132.Once the amplitude suppressing portion 1512a of the first claw portion 1512 is engaged, the amplitude suppressing portion 1512a then presses the second heat dissipation fin 1323 of the adjacent first fin portion 132 and the first heat dissipation fin 1322 of the adjacent second fin portion 132 from the second direction (the right direction X1 and the left direction X2). As a result, the width W1 between the upper end portions 1325, which are the free ends of the single fin portion 132 and which were wide in the state of FIG. 21 , narrows, and the movement of the upper end portions 1325 is restricted.

[0066] The length L7 of the first claw portion 1512 in the Z direction is greater than the length L8 of the second claw portion 1513 in the Z direction. Therefore, when the top plate portion 15 is placed on the fin portion 132, the tip portion 1512c of the first claw portion 1512 first abuts against the upper end portion 1325 of the fin portion 132, and then the tip portion 1513c of the second claw portion 1513 abuts against the upper end portion 1325 of the fin portion 132. As described above, the second claw portion 1513 is placed inside the single fin portion 132. That is, the second claw portion 1513 is placed between the first heat dissipation fin 1322 and the second heat dissipation fin 1323 of the single fin portion 132. A method of inserting the second claw portion 1513 will be described below. In the state shown in FIG. 24 , the first claw 1512 is first inserted into the adjacent fin portion 123, and the width W1, which is the distance between the heat dissipation fins 1230 of the fin portion 132, is narrowed by the insertion pressure of the first claw 1512. At this time, as shown in FIG. 24 , first, the tip 1513c of the second claw 1513 is inserted between the first heat dissipation fin 1322 and the second heat dissipation fin 1323 of a single fin portion 132. Although the tip 1513c is shown schematically in FIG. 24 , in reality, it is smoothly curved as shown in FIG. 17 . Therefore, the tip 1513c can be smoothly inserted between the first heat dissipation fin 1322 and the second heat dissipation fin 1323. Then, the second claw 1513 is further inserted between the first heat dissipation fin 1322 and the second heat dissipation fin 1323. Then, the width W1 between the first heat dissipation fin 1322 and the second heat dissipation fin 1323 gradually increases due to the insertion pressure of the guide portions 1513b, which are tapered inclined portions of the second claw portions 1513. Thereafter, when the second claw portions 1513 are further inserted between the first heat dissipation fin 1322 and the second heat dissipation fin 1323, the amplitude suppressing portions 1513a of the second claw portions 1513 come into contact with the first heat dissipation fin 1322 and the second heat dissipation fin 1323, as shown in Fig. 25. Once the amplitude suppressing portions 1513a of the second claw portions 1513 are engaged, the amplitude suppressing portions 1513a then press the first heat dissipation fin 1322 and the second heat dissipation fin 1323 of the fin portion 132 from the second direction (the rightward direction X1 and the leftward direction X2).This maintains the width W1 between the first heat dissipation fin 1322 and the second heat dissipation fin 1323 of the single fin portion 132, and restricts the movement of the upper end portion 1325.

[0067] In this manner, the width W2 is maintained by the first claw portion 1512, and the width W1 is maintained by the second claw portion 1513. That is, the first claw portion 1512 prevents the distance between the first heat dissipation fin 1322 and the second heat dissipation fin 1323 of the single fin portion 132 from increasing. Meanwhile, the second claw portion 1513 prevents the first heat dissipation fin 1322 and the second heat dissipation fin 1323 of the single fin portion 132 from becoming too close. As a result, the widths W1 and W2 are uniform throughout the heat sink portion 13, and air flows uniformly throughout the heat sink portion 13. This reduces the likelihood of a pressure difference due to airflow, thereby suppressing vibration of the heat dissipation fins 1320 of the heat sink portion 13.

[0068] [Effects of the First Embodiment] As described above, in the first embodiment, the first claw portion 1512 of the top plate portion 15 is arranged on the outside of one of the fin portions 132, and the second claw portion 1513 of the top plate portion 15 is arranged on the inside of one of the fin portions 132. Therefore, the first heat dissipation fin 1322 and the second heat dissipation fin 1323 are pressed by being sandwiched between the first claw portion 1512 and the second claw portion 1513, respectively, thereby suppressing vibration.

[0069] In the first embodiment, the length L7 of the first claw portion 1512 in the protruding direction is greater than the length L8 of the second claw portion 1513. Therefore, the triangular first claw portion 1512 of the top plate portion 15 abuts the heat dissipation fin 1320 before the second claw portion 1513. The first claw portion 1512 moves along the triangular shape. In this way, the first claw portion 1512 is inserted between the heat dissipation fins 1320 first, correcting the widths W1 and W2 between the heat dissipation fins 1320, thereby positioning the second claw portion 1513 and the width W1 between the heat dissipation fins 1320. This makes it easier to insert the second claw portion 1513 between the heat dissipation fins 1320. This facilitates the attachment of the top plate portion 15 and the heat sink portion 13.

[0070] As shown in FIG. 21 , if the width W1 of the heat sink 13 is wide and the width W2 is narrow, the ease of airflow will differ between the widths W1 and W2. That is, if the widths W1 and W2 are uneven across the entire heat sink 13, the ease of airflow will differ depending on the location. As a result, a pressure difference due to wind may occur, which may cause the heat dissipation fins 1320 of the heat sink 13 to vibrate. Meanwhile, in the first embodiment, the top plate 15 is provided with first claws 1512 and second claws 1513. The first claws 1512 and second claws 1513 restrict movement of the upper end portions 1325 of the heat dissipation fins 1320 so that the widths W1 and W2 are uniform. This makes the spacing between the heat dissipation fins 1320 uniform, reducing the likelihood of a pressure difference due to wind, thereby suppressing vibration of the heat dissipation fins 1320 of the heat sink 13. As a result, damage to the radiation fins 1320 of the heat sink portion 13 due to vibration can also be prevented.

[0071] In this way, in the first embodiment, the first claw portions 1512 and the second claw portions 1513 of the top panel portion 15 fit between the heat dissipation fins 1320 of the heat sink portion 13, thereby suppressing vibration of the heat dissipation fins 1320 due to the influence of vibration of the lighting device 1 or wind. The first claw portions 1512 and the second claw portions 1513 of the top panel portion 15 can make the distance between the heat dissipation fins 1320 uniform.

[0072] In the first embodiment, first claw portion 1512 corrects the position of upper end portion 1325 of heat dissipation fin 1320 while fitting into width W2, which tends to narrow, of heat dissipation fin 1320. By arranging first claw portion 1512 on the wider side between heat dissipation fins 1320, i.e., on the outside of one fin portion 132, first claw portion 1512 serves as a guide when assembling top plate portion 15, making it easier to insert second claw portion 1513 and facilitating the assembly process.

[0073] In the first embodiment, the first claws 1512 have guide portions 1512b formed by inclined portions, which allows for easy widening of the width W2 of the heat dissipation fins 1320, which tends to narrow. Furthermore, the first claws 1512 have amplitude suppression portions 1512a formed by straight portions. Therefore, after the top plate 15 is attached to the heat sink 13, the amplitude suppression portions 1512a contact and press the heat dissipation fins 1320, thereby restricting the movement of the heat dissipation fins 1320. As described with reference to FIG. 20 , the amplitude suppression portions 1512a of the first claws 1512 contact the heat dissipation fins 1320 so that the angle γ is 90° or approximately 90°. Therefore, once the amplitude suppression portions 1512a of the first claws 1512 are fitted between the adjacent heat dissipation fins 1320, the first claws 1512 are prevented from falling out from between the heat dissipation fins 1320. Note that guide portion 1512b is provided for assembly purposes and does not function after top panel portion 15 is attached to heat sink portion 13. Therefore, amplitude suppression portion 1512a abuts against heat dissipation fin 1320, thereby reliably restricting the movement of heat dissipation fin 1320.

[0074] Similarly, in the first embodiment, the second claws 1513 have guide portions 1513b each formed of an inclined portion, which allows for easy widening of the width W1 between the heat dissipation fins 1320. Furthermore, the second claws 1513 have amplitude suppression portions 1513a each formed of a straight portion. Therefore, after the top plate 15 is attached to the heat sink 13, the amplitude suppression portions 1513a contact and press the heat dissipation fins 1320, thereby restricting the movement of the heat dissipation fins 1320. As described with reference to FIG. 20 , the amplitude suppression portions 1513a of the second claws 1513 contact the heat dissipation fins 1320 so that the angle δ is 90° or approximately 90°. Therefore, once the amplitude suppression portions 1513a of the second claws 1513 are fitted to the heat dissipation fins 1320, the second claws 1513 can be prevented from falling off the heat dissipation fins 1320. Note that the guide portion 1513b is provided for assembly purposes and does not function after the top panel portion 15 is attached to the heat sink portion 13. Therefore, the amplitude suppression portion 1513a comes into contact with the heat dissipation fins 1320, and the movement of the heat dissipation fins 1320 can be reliably restricted.

[0075] In the first embodiment, the first claws 1512 are disposed on the outer periphery side of the top plate 15 relative to the second claws 1513. That is, the first claws 1512 are disposed on the outer periphery side of the top plate 15, and the second claws 1513 are disposed on the inner periphery side of the top plate 15. This configuration allows the heat dissipation fins 1320 to be sandwiched and fixed in place in opposite directions at two locations, on the outer periphery and the inner periphery. This ensures that both the widths W1 and W2 are maintained. Furthermore, this configuration ensures that the first claws 1512 and the second claws 1513 are not disposed close to each other on the top plate 15. This simplifies the configuration of the top plate 15, improves the workability of the manufacturing process (cutting and raising process) of the top plate 15, and makes the work easier. In the first embodiment, the case where the first claw portion 1512 is arranged on the outer periphery of the top plate portion 15 and the second claw portion 1513 is arranged on the inner periphery of the top plate portion 15 has been described as an example, but the present invention is not limited to this. That is, the second claw portion 1513 may be arranged on the outer periphery of the top plate portion 15 and the first claw portion 1512 may be arranged on the inner periphery of the top plate portion 15. In this case as well, it goes without saying that the same effect can be obtained.

[0076] In this disclosure, the heat sink portion 13 has been described as having a shape in which the fin portions 132 are arranged in a spiral shape relative to the base center portion 1310, but the fin portions 132 may also be arranged radially relative to the base center portion 1310, or may be arranged side by side in the width direction X and the depth direction Y.

[0077] Although the lighting devices according to the embodiments of the present disclosure have been described above, the above embodiments are merely examples of lighting devices that embody the technical concepts of the present disclosure and are not intended to limit the present disclosure to these. In other words, the present disclosure is equally applicable to other embodiments, such as those in which appropriate modifications are made to the respective embodiments or examples, and combinations thereof. [Explanation of symbols]

[0078] 1 lighting device, 10 light source unit, 11 light-emitting portion, 12 cover portion, 13 heat sink portion, 14 connecting portion, 15 top plate portion, 16 power supply unit, 20 arm, 21 arm main portion, 22 arm support portion, 30 connecting member, 31 screw portion, 32 head portion, 40 cover fixing member, 50 top plate fixing member, 111 light-emitting element, 112 board, 113 board terminal, 121 cover main portion, 122 cover flange portion, 123 cover through hole, 131 base portion, 132 fin portion, 141 column main portion, 142 column side portion, 143 base fixing portion, 144 cover holding portion, 145 top plate mounting portion, 150 top plate center portion, 151 top plate main portion, 152 top plate connecting portion, 161 power supply main body portion, 162 power supply cover portion, 211 Main portion through hole, 221 arm connection portion, 1121 mounting surface, 1310 base center portion, 1311 base main portion, 1311a light source attachment portion, 1311b fin attachment portion, 1311c base electric wire insertion portion, 1311d base through hole, 1312 base flange portion, 1312a flange main body portion, 1312b fitting portion, 1320 heat dissipation fin, 1320a lower end portion, 1320b end portion, 1321 fin fixing portion, 1322 first heat dissipation fin, 1323 second heat dissipation fin, 1324 fin protrusion portion, 1325 upper end portion, 1411 column connecting portion, 1431 connecting portion fixing portion, 1441 holding vertical portion, 1442 holding horizontal portion, 1451 top plate fixing portion, 1511 Top plate opening, 1512 first claw portion, 1512a amplitude suppression portion, 1512b guide portion, 1512c tip portion, 1512d root portion, 1513 second claw portion, 1513a amplitude suppression portion, 1513b guide portion, 1513c tip portion, 1513d root portion, 1521 top plate through hole, 1522 top plate cutout portion, 1611 primary power line portion, 1612 secondary power line portion, 1613 power leg portion, 2111 first main portion through hole, 2112 second main portion through hole, 2211 arm insertion hole.

Claims

1. a light-emitting unit in which a light-emitting element is mounted on a substrate; a heat sink portion including a base portion configured in a plate shape and having the light emitting portion attached to one surface thereof, and a first heat dissipation fin and a second heat dissipation fin protruding in a first direction from the other surface of the base portion; a top plate portion attached to the heat sink portion so as to cover the first heat dissipation fins and the second heat dissipation fins; Equipped with the top plate portion has claw portions that are fitted between the first heat dissipation fins and the second heat dissipation fins and press the first heat dissipation fins and the second heat dissipation fins from a second direction intersecting the first direction, The claw portions are arranged at regular intervals, and only one claw portion is provided between one of the first heat dissipation fins and one of the second heat dissipation fins adjacent thereto. Lighting equipment.

2. the first direction is a direction perpendicular to the base portion of the heat sink portion; The lighting device according to claim 1 .

3. the second direction is a direction parallel to the base portion of the heat sink portion; 3. The lighting device according to claim 1 or 2.

4. The claw portion is formed in a plate shape and protrudes from a main portion of the top plate, which is a main surface of the top plate portion, in a direction opposite to the first direction. The lighting device according to any one of claims 1 to 3.

5. a light-emitting unit in which a light-emitting element is mounted on a substrate; a heat sink portion including a base portion configured in a plate shape and having the light emitting portion attached to one surface thereof, and a first heat dissipation fin and a second heat dissipation fin protruding in a first direction from the other surface of the base portion; a top plate portion attached to the heat sink portion so as to cover the first heat dissipation fins and the second heat dissipation fins; Equipped with the top plate portion has claw portions that are fitted between the first heat dissipation fins and the second heat dissipation fins and press the first heat dissipation fins and the second heat dissipation fins from a second direction intersecting the first direction, The claw portion is A tip portion and a guide portion connected to the tip portion and tapered toward the tip portion; and When the top plate portion is attached to the heat sink portion, the guide portion corrects the width between the first heat dissipation fin and the second heat dissipation fin as the claw portion is inserted between the first heat dissipation fin and the second heat dissipation fin. Lighting equipment.

6. The claw portion is an amplitude suppression portion connected to the guide portion on the opposite side to the tip portion and extending linearly in the first direction; When the top plate portion is attached to the heat sink portion, the amplitude suppression portion abuts against the first heat dissipation fin and the second heat dissipation fin to maintain a width between the first heat dissipation fin and the second heat dissipation fin.

6. The lighting device according to claim 5.

7. a light-emitting unit in which a light-emitting element is mounted on a substrate; a heat sink portion including a base portion configured in a plate shape and having the light emitting portion attached to one surface thereof, and a first heat dissipation fin and a second heat dissipation fin protruding in a first direction from the other surface of the base portion; a top plate portion attached to the heat sink portion so as to cover the first heat dissipation fins and the second heat dissipation fins; Equipped with the top plate portion has claw portions that are fitted between the first heat dissipation fins and the second heat dissipation fins and press the first heat dissipation fins and the second heat dissipation fins from a second direction intersecting the first direction, The claw portion is a first claw portion; a second claw portion having a length in the first direction that is shorter than the length in the first direction of the first claw portion; Including, Lighting equipment.

8. The first claw portion is disposed on the outer circumferential side of the second claw portion.

8. The lighting device according to claim 7.

9. The first claw portion is disposed on the inner peripheral side of the second claw portion.

8. The lighting device according to claim 7.

10. The first claw portion and the second claw portion abut against each other in opposite directions in the second direction so as to sandwich the first heat dissipation fin therebetween, and the second heat dissipation fins are abutted against each other in opposite directions in the second direction so as to sandwich the second heat dissipation fins therebetween; The lighting device according to any one of claims 7 to 9.

11. the heat sink portion has a plurality of fin portions formed in a U-shape and attached to the base portion, The fin portion is the first heat dissipation fin; the second heat dissipation fin disposed opposite the first heat dissipation fin; a fin fixing portion that connects the first heat dissipation fin and the second heat dissipation fin and is fixed to the base portion; and the first claw portion is disposed on the outer side of the fin portion formed in the U-shape, The second claw portion is disposed inside the fin portion formed in the U-shape. The lighting device according to any one of claims 7 to 10.

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