JP7403341B2 - heat sinks and lighting fixtures - Google Patents

Description

The present invention relates to a heat sink and a lighting fixture having a heat sink.

Patent Document 1 describes a lighting device having a heat sink that radiates heat generated by a light source unit. The heat sink is provided with a plurality of radiating fins.

Further, the heat sink is fixed to the base member with screws. Therefore, a screw hole is formed in the heat sink.

Japanese Patent Application Publication No. 2019-125556

As described above, in the lighting device described in Patent Document 1, screw holes are formed in the heat sink. However, the radiation fins cannot be provided in the area where the screw holes are formed. Therefore, the heat dissipation fins were thinned out in this area. As a result, there was a problem in that the number of heat dissipation fins was reduced.

The present invention was made to solve this problem, and an object of the present invention is to obtain a heat sink and a lighting fixture in which a mounting hole into which a connecting component is inserted is formed without thinning out the radiation fins.

The present invention includes a mounting section that is attached to an attached section, and a light source unit that is fixed to the mounting section and has a heat sink, and the heat sink includes a plate-shaped base section that is fixed to the mounting section, and a light source unit that is fixed to the mounting section and has a heat sink. a radiation fin provided on one main surface of the part and extending in a direction perpendicular to the main surface; the base part has a connection provided on the main surface for fixing to the mounting part; It has a mounting hole into which a component is inserted, and the radiation fins are arranged radially in a direction from a central portion of the main surface of the base portion toward an outer peripheral portion of the main surface in plan view, and The lighting fixture is arranged along the outer periphery of the attachment hole so that the head of the connection component does not hit the attachment hole, bypassing the attachment hole in a region where the hole is provided.

According to the lighting device according to the present invention, it is possible to obtain a heat sink and a lighting device in which a mounting hole into which a connecting component is inserted is formed, without thinning out the radiation fins.

1 is a perspective view showing the configuration of a lighting fixture according to Embodiment 1. FIG. 1 is an exploded perspective view showing the configuration of a lighting fixture according to Embodiment 1. FIG. 1 is an exploded perspective view showing the configuration of a lighting fixture according to Embodiment 1. FIG. 1 is a perspective view showing the configuration of a reflector of a lighting fixture according to Embodiment 1. FIG. FIG. 2 is a plan view showing the configuration of a heat sink of the lighting fixture according to Embodiment 1. FIG. FIG. 2 is a partial perspective view showing a terminal block of the power supply device of the lighting fixture according to the first embodiment. FIG. 2 is a perspective view showing a power supply unit and a terminal block provided in the power supply device of the lighting fixture according to the first embodiment. 1 is a side view showing the configuration of a lighting fixture according to Embodiment 1. FIG. FIG. 3 is a partially enlarged side view showing a rotating state of the power supply device of the lighting fixture according to Embodiment 1; FIG. 3 is a partially enlarged side view showing a rotating state of the power supply device of the lighting fixture according to Embodiment 1; FIG. 3 is a partially enlarged side view showing a rotating state of the power supply device of the lighting fixture according to Embodiment 1; FIG. 3 is a perspective view showing the configuration of a heat sink according to a second embodiment. FIG. 7 is a perspective view showing the configuration of a wire stopper provided in a heat sink according to Embodiment 2. FIG. FIG. 7 is a side view showing the configuration of a wire stopper provided in a heat sink according to Embodiment 2; FIG. 7 is a perspective view showing a state in which a wire stopper is attached to a heat sink according to Embodiment 2; FIG. 7 is a perspective view showing a state in which a wire stopper and a light emitting part are attached to a heat sink according to a second embodiment.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a lighting fixture according to the present invention will be described with reference to the drawings. The present invention is not limited to the following embodiments, and can be variously modified without departing from the spirit of the present invention. Further, the present invention includes all combinations of configurations that can be combined among the configurations shown in the following embodiments. Furthermore, in each figure, the same reference numerals are the same or equivalent, and this is common throughout the entire specification. Note that in each drawing, the relative dimensional relationship or shape of each component may differ from the actual one. In addition, in the entire specification, the direction from the floor to the ceiling will be referred to as the "Z1 direction", and the direction from the ceiling to the floor will be referred to as the "Z2 direction". Both the "Z1 direction" and the "Z2 direction" are vertical directions. Further, the side closer to the ceiling than the floor will be referred to as the "Z1 side", and the side closer to the floor than the ceiling will be referred to as the "Z2 side". Furthermore, the direction perpendicular to the "Z1 direction" and the "Z2 direction" is referred to as the "horizontal direction."

Embodiment 1.
In Embodiment 1, a ceiling-mounted lighting fixture 100 will be described as an example of a lighting fixture.

The configuration of the lighting fixture 100 will be described below using FIGS. 1 to 11. FIG. 1 is a perspective view showing the configuration of a lighting fixture 100 according to the first embodiment. 2 and 3 are exploded perspective views showing the configuration of lighting fixture 100 according to the first embodiment. FIG. 4 is a perspective view showing the configuration of the reflector 11 of the lighting fixture 100 according to the first embodiment. FIG. 5 is a plan view showing the configuration of the heat sink 41 of the lighting fixture 100 according to the first embodiment. FIG. 6 is a partial perspective view showing the terminal block 54 of the power supply device 50 of the lighting fixture 100 according to the first embodiment. FIG. 7 is a perspective view showing the power supply unit 51 and the terminal block 54 provided in the power supply device 50 of the lighting fixture 100 according to the first embodiment. FIG. 8 is a side view showing the configuration of lighting fixture 100 according to the first embodiment. Note that FIG. 8 shows a state in which the lighting fixture 100 is attached to an attached part 600 such as a ceiling. Further, FIGS. 9 to 11 are partially enlarged side views showing the rotating state of the power supply device 50 of the lighting fixture 100 according to the first embodiment.

(Lighting equipment 100)
As shown in FIGS. 1 to 3, the lighting fixture 100 includes a mounting portion 10 that is attached to a mounting portion such as a ceiling, and a light source unit 40 that outputs light. The attachment part 10 is provided at the bottom of the light source unit 40 and holds the light source unit 40. The light source unit 40 is fixed to the mounting part 10 and has a heat sink 41 for dissipating heat generated from a light emitting part 21, which will be described later.

As shown in FIG. 8, the lighting fixture 100 is a downlight that is inserted into a small-diameter embedded hole formed in a mounting portion 600 such as a ceiling, for example. The small-diameter embedded hole is, for example, a circular hole with a diameter of about 75 mm to 85 mm. Note that when the embedded hole is square, the length of the diagonal line is about 75 mm to 85 mm. However, these dimensions are just examples and are not limited thereto. Note that, hereinafter, the embedded hole will be referred to as an opening 601. In the lighting fixture 100 , the light source unit 40 is inserted into an opening 601 formed in the attached portion 600 and is attached to the attached portion 600 by the attachment portion 10 .

Therefore, the outer diameter of the heat sink 41 provided in the light source unit 40 of the lighting fixture 100 is set to be smaller than the diameter or diagonal of the opening 601 so that it can be inserted into the opening 601 of the attached part 600. .

(Light source unit 40)
As shown in FIG. 3, the light source unit 40 includes a lens 30, a light emitting section 21, a heat sink 41, and a power supply device 50. Each component of the light source unit 40 will be described later.

(Mounting part 10)
The attachment part 10 is a member that is attached to the opening 601 of the attachment target part 600 when the lighting fixture 100 is fixed to the attachment target part 600. The mounting portion 10 includes a reflector 11 and a spring 12, as shown in FIGS. 1 to 3.

(Reflector 11)
The reflector 11 adjusts the direction in which the light from the light source unit 40 travels. That is, the reflector 11 adjusts the irradiation angle of the light emitted from the light emitting section 21 of the light source unit 40. FIG. 2 is a perspective view of the reflector 11 viewed from the Z1 side in the Z2 direction, and shows a state in which a lens 30, which will be described later, is attached. FIG. 3 is a perspective view of the reflector 11 viewed from the Z1 side in the Z2 direction. Conversely, FIG. 4 is a perspective view of the reflector 11 viewed from the Z2 side in the Z1 direction, showing a state in which only the lens 30 is attached to the reflector 11 and the light shielding sheet 213 is not attached to the reflector 11.

The reflector 11 has a reflecting part 111 and a flange part 114, as shown in FIG. Moreover, the reflector 11 has an outer cylinder part 112 and an inner cylinder part 113, as shown in FIG.

The reflecting part 111 is provided on the Z2 side of the reflector 11, as shown in FIG. The reflecting portion 111 has a truncated conical shape. The reflecting portion 111 is formed so as to expand in a tapered shape as it advances in the Z2 direction.

The collar portion 114 is an annular member. The flange portion 114 is provided around the entire circumference of the end portion of the reflecting portion 111 on the Z2 side. The flange portion 114 extends horizontally from the end of the reflecting portion 111 on the Z2 side toward the outside. When the lighting fixture 100 is attached to the attached part 600, the collar part 114 comes into contact with the edge of the opening 601 of the attached part 600.

Each of the outer cylinder part 112 and the inner cylinder part 113 has a cylindrical shape. The inner cylinder part 113 is arranged inside the outer cylinder part 112. The axial direction of each of the outer cylinder part 112 and the inner cylinder part 113 extends in the Z1 direction. Further, as shown in FIG. 3, the outer cylindrical portion 112 is formed to be higher in height than the inner cylindrical portion 113. That is, the position of the upper end of the outer cylinder part 112 is higher than the position of the upper end of the inner cylinder part 113. In this way, the outer cylinder part 112 protrudes more than the inner cylinder part 113 in the Z1 direction, so that when the mounting part 10 is connected to the light source unit 40, the outer cylinder part 112 is attached to the base part of the heat sink 41. 411 , and a gap is formed between the inner cylinder portion 113 and the base portion 411 of the heat sink 41 .

As shown in FIG. 2, an engagement hole 1121 is formed in the outer cylinder portion 112 to be engaged with a connecting component 60 such as a screw for connecting to the heat sink 41 of the light source unit 40. Further, as shown in FIG. 3, the outer cylinder portion 112 is provided with an outer convex portion 1122. The outer convex portion 1122 is provided to protrude from the Z1 side end of the outer cylinder portion 112 in the Z1 direction. Further, as shown in FIG. 3, the inner cylinder portion 113 is provided with an inner convex portion 1131. The inner convex portion 1131 projects from the Z1 side end of the inner cylinder portion 113 in the Z1 direction.

The outer convex portion 1122 is provided for positioning the light source unit 40 when attaching the light source unit 40 to the mounting portion 10. The inner convex portion 1131 comes into contact with the side surface of the insulating sheet 212 of the light source unit 40 and guides the insulating sheet 212 when the light source unit 40 is attached to the mounting portion 10 .

The lens 30 of the light source unit 40 is housed inside the inner cylinder portion 113 . The lens 30 is inserted into the inner cylinder part 113 from the Z1 side and placed on the edge of the opening of the reflection part 111. By attaching the light emitting section 21 and the heat sink 41 to the Z1 side, movement of the lens 30 from the inner cylinder section 113 in the Z1 direction and the Z2 direction is restricted. Further, as a matter of course, the movement of the lens 30 in the horizontal direction is restricted by the inner wall surface of the inner cylinder portion 113. This prevents the lens 30 from falling off the reflector 11.

Therefore, the lens 30 of the light source unit 40 does not need to be processed to form a special shape for fixation, and can be easily installed on the mounting portion 10. Further, the outer diameter of the lens 30 is formed to be smaller than the inner diameter of the inner cylinder portion 113. Therefore, a gap is formed between the inner circumferential surface of the inner cylinder portion 113 and the outer circumferential surface of the lens 30. Therefore, when inserting the lens 30 into the inner cylinder part 113 from the Z1 side, there is a margin between the inner circumferential surface of the inner cylinder part 113 and the outer circumferential surface of the lens 30, making it easy to insert the lens 30.

The spring 12 is formed by bending a spring steel material and has elastic force. Three springs 12 are provided. However, the number of springs 12 is not limited to three, and may be any number as long as it is two or more. It is desirable that the springs 12 are arranged at the same intervals in the circumferential direction of the reflector 11. Each of the springs 12 is fixed so as to extend radially outward from the flange 114 of the reflector 11.

When the lighting fixture 100 is installed in the opening 601 of the attached part 600, the spring 12 is pressed by a worker and elastically deforms toward the heat sink 41 side. In this state, the lighting fixture 100 is inserted into the opening 601. When the lighting fixture 100 is inserted into the opening 601, the elastic deformation of the spring 12 is released. As a result, the spring 12 and the flange 114 of the reflector 11 sandwich the edge of the opening 601. In this way, the mounting part 10 of the lighting fixture 100 is fixed to the mounted part 600.

Each component of the light source unit 40 will be explained below.

(Light emitting section 21)
The light emitting section 21 of the light source unit 40 includes a socket 211 on which a light emitting board 2111 is mounted, an insulating sheet 212, and a light shielding sheet 213.

The light shielding sheet 213 is an annular member and has an opening 2131 in the center so that the light emitting substrate 2111 is exposed. The light shielding sheet 213 is disposed such that the opening edge thereof is sandwiched between the lower surface of the socket 211 and the upper edge of the lens 30. The light-shielding sheet 213 closes the space between the lens 30 and the inner cylinder portion 113, which will be described later, and guides light emitted from the light emitting elements to the lens 30 so as not to leak to the surroundings. The insulating sheet 212 has a flat plate shape and is arranged between the heat sink 41 and the socket 211 so as to cover the Z1 side surface of the socket 211. The insulating sheet 212 insulates between the heat sink 41 and the light emitting board 2111 of the socket 211. The socket 211 has an annular shape and holds a light emitting board 2111 fitted into an opening at the center. An electric wire 80 (see FIG. 16) connected to the power supply device 50 is connected to the socket 211. In the light emitting unit 21, the power supply device 50 and the light emitting board 2111 are electrically connected via the electric wire 80. The insulating sheet 212 and the socket 211 have a pair of through holes, and are fixed to the heat sink 41 with a connecting part 61 such as a screw. A mounting hole 4112 is provided in the base portion 411 of the heat sink 41, as shown in FIG. As shown in FIG. 3, the light emitting section 21 is constructed by placing an insulating sheet 212 in contact with the lower surface of the base section 411, and connecting a connecting part 61 such as a screw commonly passed through a through hole formed in the socket 211 and the insulating sheet 212. It is screwed into the mounting hole 4112 and fixed to the base part 411. Note that the light shielding sheet 213 can be prevented from falling off by attaching the lens 30 and the attachment part 10, which will be described later, from the Z2 side, but if necessary, it may be necessary to attach a clip (not shown) to the socket 211 or the insulating sheet 212. It may be fixed with mounting parts.

A light emitting element (not shown) is mounted on the light emitting board 2111. As the light emitting element, for example, an LED light emitting element is used. Note that the light-emitting element of the light-emitting substrate 2111 may be a chip-on-board (COB)-LED or a packaged light-emitting element.

(lens 30)
The lens 30 is arranged to cover the opening 2131 of the light shielding sheet 213. The lens 30 has a truncated cone shape, and a flange is provided at the edge of the end surface on the Z2 side. The flange projects horizontally and outwardly. The lens 30 controls the direction in which the light emitted from the light emitting section 21 travels so that it is directed toward a target. The end surface of the lens 30 on the Z1 side is an entrance concave portion having a concave lens shape with a concave central portion. The end surface of the lens 30 on the Z2 side serves as an irradiation part having a planar shape. In the lens 30, the light from the light emitting part 21 is incident on the entrance concave part on the Z1 side, the incident light is directed in a preset direction, and is emitted in the Z2 direction from the irradiation part on the Z2 side.

(Heat sink 41)
The heat sink 41 is made of a material with good heat dissipation efficiency, such as aluminum, and radiates heat generated from the light emitting section 21 to the outside. The heat sink 41 is formed by forging. The heat sink 41 is molded by pushing a highly pure metal material such as aluminum into a forging die and compressing it. As shown in FIG. 2, the heat sink 41 includes a plate-shaped base portion 411 fixed to the mounting portion 10 and heat radiation fins 410. The radiation fin 410 is provided on the Z1 side main surface of the two main surfaces of the base portion 411, and extends in a direction perpendicular to the main surface. That is, the heat radiation fins 410 are arranged so as to rise in the Z1 direction from the main surface of the base portion 411 on the Z1 side. As shown in FIG. 3, the heat sink 41 is arranged such that the main surface of the base portion 411 on the Z2 side faces the light emitting portion 21.

Further, the heat sink 41 includes a power supply holding part 4113, a shaft part 414, and a locking part 415, as shown in FIGS. 8 to 11. The power supply holding part 4113 is a holding member that holds the power supply device 50. The power supply holding unit 4113 will be described later using FIG. 5. The shaft portion 414 rotatably supports the power supply device 50 with respect to the power supply holding portion 4113. The locking portion 415 is provided on the power supply holding portion 4113 and limits the rotation range of the power supply device 50. Both the shaft portion 414 and the locking portion 415 are made of screws, but are not limited thereto. For example, the shaft portion 414 and the locking portion 415 may be formed from a portion of the radiation fin 410 of the heat sink 41. In that case, the shaft portion 414 and the locking portion 415 are made of the same material as the radiation fin 410 and are formed by forging at the same time as the radiation fin 410.

FIG. 5 shows a plan view of the heat sink 41. The base portion 411 has a circular shape in plan view, and has an outer diameter of 70 mm. The outer diameter of the base portion 411 is not limited to this, but is appropriately determined within the range of φ50 mm to φ100 mm. The base portion 411 is provided with a notch portion 4111 through which the power wire is inserted, a mounting hole 4112 into which the connecting components 60 and 61 are inserted, and a power source holding portion 4113. Further, the outer periphery of the base portion 411 is not completely circular, but a portion of the outer periphery is formed linearly in accordance with the position of the spring 12. The base portion 411 is arranged such that the power supply holding portion 4113 and the notch portion 4111 are on the power supply device 50 side.

The attachment hole 4112 is provided on the main surface of the base portion 411. The attachment hole 4112 is, for example, a through hole having a diameter of 3.3 mm that extends from the main surface on the Z1 side of the base portion 411 to the main surface on the Z2 side. Connection parts 61 and 60 such as screws shown in FIG. 3 are inserted into the attachment holes 4112. As a result, the light emitting section 21 is attached to the base section 411 of the heat sink 41, and the base section 411 of the heat sink 41 is fixed to the reflector 11 of the attachment section 10.

The power supply holding part 4113 functions as a holding member to which the power supply device 50 is attached and holds the power supply device 50 . As shown in FIG. 1, the power supply holding portion 4113 projects from the base portion 411 in the Z1 direction. As shown in FIG. 5, the power supply holding portion 4113 has a U-shaped horizontal cross section that extends laterally. The power supply holding parts 4113 are provided in pairs at the ends of the base part 411. As shown in FIG. 1, the power source holding portion 4113 is provided with a power source holding hole 4114 (see also FIG. 12) into which the shaft portion 414 is inserted. The power supply holding hole 4114 is provided a preset distance below from the upper end of the power supply holding part 4113. It is desirable that the power supply holding hole 4114 be provided above the position of the central portion of the power supply holding part 4113 in the Z1 direction. The shaft portion 414 is inserted into the power supply holding hole 4114 and a mounting hole 5212 provided in the arm portion 521 of the power supply device 50 shown in FIG. The power supply holding portion 4113 may be formed by forging together with the radiation fins 410, or may be formed separately. However, since it is preferable that the power supply holding part 4113 also functions as a heat radiation fin, it is preferable that the power supply holding part 4113 is made of a metal material such as high-purity aluminum.

The cutout portion 4111 is formed by cutting out a portion of the base portion 411. The cutout portion 4111 has a U-shape in plan view. The cutout portion 4111 is arranged between the pair of power supply holding portions 4113, and the electric wire 80 connecting the power supply device 50 and the light source unit 40 is arranged inside the U-shape.

In a state where the heat sink 41 is fixed to the reflector 11, the notch 4111 faces the space formed between the outer cylinder part 112 and the inner cylinder part 113 of the reflector 11. When the power wire is inserted into the notch 4111, there is a gap between the inner cylinder portion 113 of the reflector 11 and the base portion 411 of the heat sink 41, which prevents the power wire from being pinched. be able to. Moreover, since the outer cylinder part 112 protrudes from the inner cylinder part 113, the outer cylinder part 112 can cover the sides of the power line and protect the power line from the outside.

Further, as shown in FIG. 5, the heat dissipation fins 410 of the heat sink 41 are arranged radially in a direction from the center of the Z1 side main surface of the base portion 411 toward the outer periphery in plan view. In a region of the base portion 411 where the attachment hole 4112 is provided, the radiation fin 410 is arranged along the outer periphery of the attachment hole 4112, bypassing the attachment hole 4112. The radiation fins 410 will be described in more detail below.

As shown in FIG. 5, the radiation fins 410 branch into branch shapes as they move toward the outer periphery of the base portion 411. The radiation fin 410 includes a column 412 arranged at the center of the main surface on the Z1 side of the base 411 and a fin section 413 connected to the column 412. The fin portions 413 are arranged radially in a direction from the pillar portion 412 toward the outer peripheral portion of the base portion 411, with the pillar portion 412 as the center, in a plan view. The fin portion 413 includes a plurality of fin main portions 4131, a fin branch portion 4132 serving as a branch point, a fin end portion 4133 branched from the fin main portion 4131, and a detour portion 4134.

Each of the fin main portions 4131 is connected to the column portion 412 and is arranged radially in a direction from the column portion 412 toward the outer peripheral portion of the base portion 411 with the column portion 412 as the center. Each of the fin main parts 4131 is arranged at equal intervals of a distance B along the outer periphery of the column part 412. The fin main portion 4131 branches into a plurality of fin end portions 4133 at a fin branch portion 4132. Each of the fin end portions 4133 extends in a direction from the fin branch portion 4132 toward the outer peripheral portion of the base portion 411, and is arranged so as to be spaced apart from each other in the direction. The detour portion 4134 is provided on at least one of the fin main portion 4131 and the fin end portion 4133, and is arranged along the outer periphery of the attachment hole 4112 so as to bypass the attachment hole 4112. The detour portion 4134 is spaced apart from the outer periphery of the attachment hole 4112 via a gap. The detour portion 4134 is formed simultaneously with the fin main portion 4131 and the fin end portion 4133 by forging. In addition, although five fin parts 413 are provided in the example of FIG. 5, it is not limited to this. Further, in the example of FIG. 5, each fin portion 413 has three fin end portions 4133, but the number is not limited to this and may be any number.

As shown in FIG. 5, the columnar portion 412 has a circular shape in plan view. The outer shape of the column portion 412 has a cylindrical shape, as shown in FIG. The longitudinal direction of the column portion 412 extends in the Z1 direction. However, since the column part 412 is formed by forging, it is hollow, and the end on the base part 411 side is open. The open end of the pillar section 412 is connected to the base section 411. Note that although the pillar portion 412 has been described as being hollow, it does not need to be hollow.

As shown in FIG. 5, the fin main portion 4131 has an elongated rectangular shape in plan view. The overall external shape of the fin main portion 4131 is a rectangular plate shape, as shown in FIG. The fin main portion 4131 has two main surfaces, two side surfaces extending in the longitudinal direction, and two side surfaces extending in the transverse direction. The longitudinal direction of the fin main portion 4131 extends in the Z1 direction. However, since the fin main part 4131 is formed by forging, it is hollow, and the end on the base part 411 side is open. One of the side surfaces of the fin main portion 4131 extending in the lateral direction is connected to the base portion 411 at the above-mentioned open end. Further, one of the two longitudinally extending side surfaces of the fin main portion 4131 is connected to the column portion 412, and the other side is connected to the fin branch portion 4132. Heat is mainly radiated from the two main surfaces of the fin main portion 4131. Note that although the fin main portion 4131 is described here as being hollow, it does not need to be hollow.

As shown in FIG. 5, the fin end portion 4133 has an elongated rectangular shape in plan view. However, the fin end portions 4133 include those having a linear shape that is not bent and those having a shape that is bent at one place. The overall external shape of the fin end portion 4133 is a rectangular plate shape, as shown in FIG. The fin end portion 4133 has two main surfaces, two side surfaces extending in the longitudinal direction, and two side surfaces extending in the transverse direction. The longitudinal direction of the fin end portion 4133 extends in the Z1 direction. However, since the fin end portion 4133 is formed by forging, it is hollow, and the end portion on the base portion 411 side is open. One of the side surfaces of the fin end portion 4133 extending in the lateral direction is connected to the base portion 411 at the above-mentioned open end. One of the two longitudinally extending side surfaces of the fin end portion 4133 is connected to the fin branch portion 4132, and the other side is disposed on the outer peripheral portion of the base portion 411. Heat is mainly radiated from the two main surfaces of the fin end portion 4133. Note that although the fin end portion 4133 has been described as being hollow, it does not need to be hollow.

As shown in FIG. 5, the detour portion 4134 has a circular arc shape with a width in plan view. The width of the detour portion 4134 is the same as that of the fin main portion 4131 and the fin end portion 4133. The detour portion 4134 is provided on at least one of the fin main portion 4131 and the fin end portion 4133. As shown in FIG. 3, the detour portion 4134 has a rectangular plate shape bent into an arc. The detour portion 4134 has two main surfaces, two side surfaces extending in the longitudinal direction, and two side surfaces extending in the transverse direction. The longitudinal direction of the detour portion 4134 extends in the Z1 direction. However, since the detour portion 4134 is formed by forging, it is hollow, and the end portion on the base portion 411 side is open. One of the side surfaces of the detour portion 4134 extending in the lateral direction is connected to the base portion 411 at the above-mentioned open end. Two longitudinally extending side surfaces of the detour portion 4134 are connected to the fin main portion 4131 or the fin end portion 4133. Heat is mainly radiated from the two main surfaces of the detour portion 4134. Note that although the detour portion 4134 is described here as being hollow, it does not need to be hollow.

In this way, the fin portion 413 has the fin end portion 4133 branched from the fin main portion 4131, so that the heat dissipation area can be increased. As a result, the fin portion 413 can improve heat dissipation efficiency, so when trying to obtain the same heat dissipation ability as when the fin end portion 4133 is not provided, it is possible to reduce the number of fin portions 413. It is possible. When the number of fin portions 413 is reduced, the distance C between adjacent fin end portions 4133 can be made larger. In the first embodiment, the distance C between adjacent fin end portions 4133 is ensured to be at least 4 mm to 5 mm. In this way, by increasing the distance C between adjacent fin end portions 4133, the heat dissipation effect is further improved.

Further, by providing the detour portion 4134, the radiation fins 410 can be provided also in the region where the attachment hole 4112 is formed. As a result, since there is no need to thin out the heat dissipation fins 410, the heat dissipation fins 410 can be arranged evenly, and as shown in FIG. They can be arranged at equal intervals of distance C.

Further, by providing the detour portion 4134, the heat from the light emitting portion 21 that has been transferred to the column portion 412 is transferred and radiated from the column portion 412 to the fin end portion 4133 without interruption on the way. be able to. Therefore, heat radiation efficiency is improved and heat can be efficiently radiated.

The diameter of the circular arc shape of the detour portion 4134 is set such that the heads of the connection parts 60 and 61 such as screws inserted into the mounting holes 4112 and tools such as screwdrivers do not hit the detour portion 4134. is set as appropriate based on the size of. For example, when the connecting parts 60 and 61 are M3 screws, the main surface of the detour portion 4134 on the mounting hole 4112 side is formed in an arc shape with a diameter in the range of 5.2 mm to 6.0 mm in plan view. Note that these dimensions are just examples, and are not limited to these examples. Here, the M3 screw is a screw with an external diameter of φ3.0 mm.

Further, since the detour portion 4134 is provided so as to protrude upward from the base portion 411 in the Z1 direction, it serves as a guide when inserting the connecting component 60 into the attachment hole 4112, making it easy for an operator to assemble it.

Furthermore, as shown in FIG. 5, by providing the detour portion 4134, the distance D between the fin portions 413 in the area where the detour portion 4134 is formed is equal to or wider than the distance C. . In this way, since a space can be secured between the fin parts 413 in the region where the detour part 4134 is formed, the assembly work from the Z1 side when fixing the heat sink 41 to the reflector 11 with the connecting part 60 is facilitated. become. Moreover, this makes it possible to use connection parts such as screws that are larger than those normally used, and in that case, the rigidity of the assembly of the heat sink 41 and the attachment part 10 is improved.

On the other hand, if the bypass portion 4134 is not provided, the space between the heat dissipation fins is narrow, making it difficult to insert screws, and it is necessary to work carefully so as not to accidentally drop the screws between the heat dissipation fins, making it difficult to assemble. It's hard to do. Furthermore, since the space between the radiation fins is narrow, a small screw such as M2 or M1 must be used as the connecting component 60. As a result, the rigidity of the assembly of the heat sink 41 and the mounting portion 10 becomes weak. Alternatively, the heat sink 41 and the attachment part 10 need to have a shape that fits into each other, and in that case, the heat sink 41 and the attachment part 10 may have a complicated shape. Note that the M2 screw here refers to a screw with a male thread having an outer diameter of φ2.0 mm, and the M1 screw refers to a screw having a male screw with an outer diameter of φ1.0 mm.

Furthermore, in FIG. 5, a fin portion 413A is provided between the notch portion 4111 and the power supply holding portion 4113. The fin portion 413A is molded together with the fin portion 413 by forging. Therefore, the fin portion 413A basically has the same configuration as the fin portion 413. The difference between the fin portion 413A and the fin portion 413 is that the fin portion 413A does not branch into branches, as shown in FIG. The fin portion 413A has a fin main portion 4131A connected to the column portion 412, and a fin end portion 4133A extending at a certain angle with respect to the fin main portion 4131A. Each of the fin end portions 4133A extends in a direction toward the outer peripheral portion of the base portion 411. Although the fin portion 413A has been described as not being branched, the present invention is not limited thereto, and may be branched if there is space. In the case of branching, the heat dissipation efficiency is further improved.

Similarly to the fin portion 413, the fin portion 413A is also provided with a detour portion 4134. The detour portion 4134 is arranged along the outer periphery of the attachment hole 4112 so as to bypass the attachment hole 4112. By providing the detour portion 4134 also in the fin portion 413A, the same effect as in the case of the fin portion 413 can be obtained.

As described above, in the first embodiment, the fin parts 413 and 413A and the power supply holding part 4113 are provided on the base part 411 of the heat sink 41 so that the density is almost equal. The fin parts 413 and 413A and the power supply holding part 4113 all radiate heat from the light emitting part 21. Therefore, heat can be radiated evenly throughout the heat sink 41.

In the conventional heat sink, the heat dissipation fins 410 are thinned out in the area where the attachment holes 4112 are formed, so the heat dissipation fins shown by arrow A in FIG. 5 are not provided. In that case, the number of heat dissipation fins is small and the heat dissipation efficiency is reduced. On the other hand, in the first embodiment, by providing the detour portion 4134, the radiation fins 410 can be installed even in the area where the attachment hole 4112 is formed, so that the number of radiation fins 410 is prevented from decreasing. can do.

(Power supply device 50)
The power supply device 50 supplies power to the light emitting section 21 to light up the socket 211 of the light emitting section 21 . As shown in FIG. 1, the power supply device 50 is attached to the heat sink 41 and arranged to extend toward the outside of the heat sink 41. One end of the power supply device 50 is rotatably attached to the heat sink 41. The other end of the power supply device 50 is a free end. The power supply device 50 includes a power supply unit 51, a case body 52, a lid portion 53, and a terminal block 54. Note that the case body 52 and the lid portion 53 constitute a housing of the power supply device 50.

(terminal block 54)
FIG. 6 is a diagram showing the terminal block 54. As shown in FIG. 6, the terminal block 54 is arranged at the free end of the two ends of the power supply device 50. Further, as shown in FIG. 7, the terminal block 54 includes a power terminal block 54a and a dimming terminal block 54b. The terminal block 54 is into which a power line is inserted in order to receive power from an external commercial power source, and is used to supply power to the power supply device 50 . Note that because the power supply wire is inserted, the terminal block 54 is not completely covered by the case body 52 and the lid part 53, and at least a portion thereof is exposed to the outside as shown in FIG.

(Power supply unit 51)
The power supply unit 51 is equipped with a power supply circuit. Power supply unit 51 is housed inside power supply device 50 . The power supply unit 51 is attached to the case body 52. Since the lid portion 53 is fitted to the case body 52, the power supply unit 51 is not exposed to the outside.

(Lid part 53)
The lid portion 53 has a box shape. The lid portion 53 is formed by bending a metal plate. The lid part 53 has a lid bottom part 532 and two lid side parts 533, as shown in FIG. As shown in FIG. 1, the lid portion 53 is attached to the case body 52 from the Z2 side to the Z1 direction. The two lid side parts 533 of the lid part 53 are connected to two opposing sides extending in the longitudinal direction of the lid bottom part 532. The two lid side parts 533 extend in the Z1 direction in FIG. 1 so as to be perpendicular to the two opposing sides extending in the longitudinal direction of the lid bottom part 532. The lid bottom part 532 and the two lid side parts 533 are integrally molded by bending one metal plate.

(Case body 52)
The case body 52 has a box shape. The case body 52 is formed by bending a metal plate. As shown in FIGS. 2 and 8, the case main body 52 has a pair of arm parts 521, a main body bottom part 522, and two main body side parts 523. Further, the case main body 52 has a protrusion 5211 provided at the tip of each arm portion 521, as shown in FIGS. 9 to 11. The two main body side parts 523 of the case main body 52 are connected to two opposing sides extending in the longitudinal direction of the main body bottom part 522. The two main body side parts 523 extend in the Z2 direction in FIG. 2 so as to be perpendicular to the two opposing sides extending in the longitudinal direction of the main body bottom part 522. Moreover, each of the arm parts 521 is provided so as to extend from each of the main body side parts 523, as shown in FIG. Each tip of the arm portion 521 has a U-shape, as shown in FIGS. 9 to 11. The arm portion 521 and the protrusion 5211 are formed using a part of the metal plate that constitutes the main body bottom surface portion 522 and the main body side surface portion 523. That is, the arm part 521, the protrusion 5211, the main body bottom part 522, and the main body side part 523 are composed of one metal plate. Each of the arm parts 521 is fixed to the shaft part 414 of the heat sink 41. Therefore, the power supply device 50 is rotatably connected to the heat sink 41 about the shaft portion 414 .

The rotating mechanism of the power supply device 50 will be described below with reference to FIGS. 8 to 11.

As described above, the power supply device 50 is rotatably connected to the heat sink 41 about the shaft portion 414 . That is, the power supply device 50 can rotate in both the R1 direction and the R2 direction in FIG. 8 with respect to the heat sink 41 around the shaft portion 414.

As described above, the protrusion 5211 is provided at the tip of each of the arm portions 521 of the case body 52, as shown in FIGS. 9 to 11. Further, the heat sink 41 is provided with a locking portion 415. The locking portion 415 limits the range of rotation of the power supply device 50 by causing the protrusion 5211 to come into contact with the locking portion 415 when the power supply device 50 is rotated around the shaft portion 414 . Thereby, collision between the arm portion 521 and the radiation fin 410 of the heat sink 41 can be prevented.

This will be explained in more detail. In the following description, when explaining the rotational state of the power supply device 50, the states in which the power supply device 50 is in the positions shown in FIGS. 8 and 9 will be described as the reference position of the power supply device 50. That is, a state in which the longitudinal direction of the power supply device 50 coincides with the horizontal direction will be described as a reference position.

As shown in FIG. 9, the arm portion 521 is provided with a mounting hole 5212. The formation position of the attachment hole 5212 is determined in accordance with the power supply holding hole 4114 of the power supply holding part 4113 of the heat sink 41 described above using FIG. The power supply device 50 is attached to the heat sink 41 by inserting and fastening the shaft portion 414 made of a screw or the like into the attachment hole 5212 of the arm portion 521 and the power supply holding hole 4114 of the heat sink 41 . The locking portion 415 is provided at the lower left position of the shaft portion 414 in FIG. That is, the locking portion 415 is provided closer to the case body 52 of the power supply device 50 than directly below the shaft portion 414 in the Z2 direction.

As shown in FIG. 8, the arm portion 521 extends in a direction intersecting the longitudinal direction of the case body 52 of the power supply device 50. The angle formed by the longitudinal direction of the case body 52 of the power supply device 50 and the longitudinal direction of the arm portion 521 is, for example, 135°. As shown in FIG. 9, the protrusion 5211 of the arm portion 521 protrudes toward the outside along the longitudinal direction of the arm portion 521. As shown in FIG. 9, the protrusion 5211 of the arm portion 521 is located at the center of the U-shaped tip of the arm portion 521. However, the installation position of the protrusion 5211 is not limited to this example. The protrusion 5211 may be installed at any position that satisfies the following conditions, for example.

The conditions will be explained. As shown in FIG. 9, when the power supply device 50 is at the reference position, the angle between the protrusion 5211 and the locking portion 415 is β°. To describe this in more detail, the angle between the side surface of the protrusion 5211 on the locking portion 415 side and the side surface of the locking portion 415 on the protrusion 5211 side is β°. Further, when the power supply device 50 is at the reference position, as shown in FIG. 9, the angle between the Z1 side side surface of the arm portion 521 and the Z1 side end of the radiation fin 410 is α°. At this time, the respective positions of the protrusion 5211 and the locking part 415 are appropriately set so as to satisfy the condition that the angle β is smaller than the angle α. By doing so, it is possible to prevent the power supply device 50 from rotating beyond the angle α°.

When the worker rotates the power supply device 50 around the shaft portion 414 in the R1 direction in FIG. As shown in FIG. 10, the protrusion 5211 comes into contact with the locking part 415. Thereby, the rotation range of the power supply device 50 in the R1 direction is limited to the range from the reference position to the first angle. As a result, the case body 52 or arm portion 521 of the power supply device 50 can be prevented from colliding with the radiation fins 410 of the heat sink 41, and deformation and damage of the heat sink 41 and power supply components due to collision can be prevented. . In this way, the locking portion 415 limits the rotation range of the power supply device 50 in the first direction. Further, the R1 direction, which is the first direction, is a direction in which the free end of the power supply device 50 moves when a force is applied to the power supply device 50 in the Z1 direction.

Further, the arm portion 521 has a second protrusion 5213, as shown in FIGS. 10 and 11. The second protrusion 5213 is provided on the Z2 side side surface of the arm portion 521 when the power supply device 50 of the arm portion 521 is at the reference position. That is, the second protrusion 5213 is provided on the side surface of the arm portion 521 on the case body 52 side. At this time, when the worker rotates the power supply device 50 around the shaft portion 414 in the R2 direction in FIG. 10, when the worker rotates it until the angle from the reference position becomes the second angle, As shown, the second protrusion 5213 of the arm portion 521 comes into contact with the locking portion 415. Thereby, the rotation range of the power supply device 50 in the R2 direction is limited to the range from the reference position to the second angle. As a result, the power supply device 50 can be prevented from colliding with the radiation fins 410 of the heat sink 41, and deformation and damage of the heat sink 41 and power supply components due to the collision can be prevented. In this way, the locking portion 415 also functions as a locking portion that limits the rotation range of the power supply device 50 in the R2 direction, which is the second direction. Note that the R1 direction and the R2 direction are opposite directions. That is, when the R1 direction is a clockwise direction on the paper surface of FIG. 9, the R2 direction is a counterclockwise direction. Note that the R1 direction and the R2 direction are opposite directions. That is, when the R1 direction is a clockwise direction on the paper surface of FIG. 9, the R2 direction is a counterclockwise direction.

Further, as shown in FIG. 8, when the lighting fixture 100 is attached to the attached part 600 and rotated in the R2 direction in FIG. 8, the angle from the reference position becomes the third angle. At times, the lid portion 53 or the case body 52 of the power supply device 50 comes into contact with the attached portion 600 . Thereby, the rotation range of the power supply device 50 in the R2 direction is limited to the range from the reference position to the third angle. Note that, as shown in FIG. 6, the lid side part 533 of the lid part 53 protrudes outward from the terminal block 54, so that the terminal block 54 and the attached part 600 do not come into contact with each other, and the terminal block A space can be provided between 54 and the attached part 600. By providing this space, it is possible to prevent the power line connected to the terminal block 54 from being pinched between the terminal block 54 and the attached part 600 and being damaged. Further, when a rigid power line is used, the power supply device 50 and the heat sink 41 may be pressed and tilted due to the elastic force of the power line. Specifically, when a power line is bent, a restoring force is generated in the power line that tends to return it to its original shape. This restoring force becomes the elastic force of the power line. However, in the first embodiment, since a space is provided between the terminal block 54 and the attached part 600, there is no need to bend the power supply wire, so no elastic force is generated, and the power supply device 50 and the heat sink 41 can be prevented from being pressed and tilted.

As described above, since the rotation of the power supply device 50 in the R1 direction is controlled by the protrusion 5211, collision between the power supply device 50 and the heat sink 41 can be suppressed. Furthermore, since the rotation of the power supply device 50 in the R2 direction is controlled by the second protrusion 5213, collision between the power supply device 50 and the heat sink 41 can be suppressed. As a result, it is possible to prevent the power supply device 50 and the heat sink 41 from being deformed or damaged due to a collision. Further, due to the collision between the power supply device 50 and the heat sink 41, the power wire interposed between the power supply device 50 and the heat sink 41 may be damaged. However, in the first embodiment, since it is possible to suppress the collision between the power supply device 50 and the heat sink 41, it is possible to prevent the power wire interposed between the power supply device 50 and the heat sink 41 from being damaged. Can be done. Further, the protrusion 5211 is a part of the case body 52 formed by bending a sheet metal, and can be formed with a simple structure.

Note that the second protrusion 5213 does not necessarily need to be provided, and may be provided as necessary.

As described above, according to the first embodiment, the heat dissipation fins 410 of the heat sink 41 are mounted bypassing the mounting holes 4112 in the region where the mounting holes 4112 into which the connecting components 60 and 61 are inserted are provided. It has a detour portion 4134 arranged along the outer periphery of the hole 4112. Thereby, the heat dissipation fins 410 in the attachment hole forming region of the heat sink 41 are not thinned out, and the assembly work of the lighting fixture 100 can be facilitated.

Furthermore, when downsizing the lighting device, it is necessary to downsize the heat sink. In that case, the number of radiation fins must be further reduced. However, in the first embodiment, since the detour portion 4134 is provided along the outer periphery of the attachment hole 4112, the number of heat dissipation fins is greater than the number of conventional heat dissipation fins. Therefore, even when downsizing a lighting device, the number of radiating fins can be approximately the same as that of conventional radiation fins, so it is possible to downsize the lighting equipment.

On the other hand, in order not to reduce the number of radiation fins of the heat sink, it is necessary to narrow the gaps between the radiation fins. In that case, when trying to insert a screw into the screw hole formed between the heat radiation fins, the space is narrow and it is difficult to insert the screw, making assembly work difficult. However, in the first embodiment, since the detour portion 4134 is provided along the outer periphery of the attachment hole 4112, as shown by the distance D in FIG. Since the space between the fin parts 413 is wide, assembly work is easy.

Note that all the dimensions of the opening 601 of the attached part 600, the base part 411 of the heat sink 41, the detour part 4134, the connecting parts 60 and 61, etc. described in Embodiment 1 above are only for miniaturization. This is an example, and is not limited to the above values. In addition, although M3 screws have been described as an example of the connecting parts 60 and 61, this is also just an example, and the invention is not limited to this. For example, standard screws such as Wit screws may be used. Good too.

Embodiment 2.
A heat sink 41 and a lighting fixture 100 including the heat sink 41 according to the second embodiment will be described using FIGS. 12 to 16.

In Embodiment 2, an embodiment will be described in which a wire stopper 70 is added to the configuration of Embodiment 1 described above. The other configurations and operations are the same as those in the first embodiment, so their description will be omitted here.

As described in Embodiment 1 above, in the light emitting unit 21 shown in FIG. 3, the power supply device 50 and the light emitting board 2111 of the socket 211 are electrically connected via the electric wire 80 (see FIG. 16). Ru.

Generally, the heat sink 41 formed by forging cannot have a portion protruding in the Z2 direction on the main surface of the base portion 411 on the Z2 side due to the characteristics of the forging die.

Therefore, the main surface of the base part 411 on the Z2 side has a flat shape, and it is not possible to form a protrusion that would hold the electric wire 80 for supplying power from the power supply device 50 to the light emitting part 21. . However, if there is no place on the main surface on the Z2 side of the base portion 411 where the electric wire 80 can be caught, the electric wire 80 may move unintentionally when the light source unit 40 is attached to the mounting portion 10. In that case, there was a possibility that the electric wire 80 would be caught between the reflector 11 and the base portion 411. Moreover, in order to avoid this, a worker has to attach the light source unit 40 to the attachment part 10 while holding down the electric wire 80, making the attachment work complicated.

Therefore, in the second embodiment, the above problem is solved by providing the wire stopper 70 on the main surface of the Z2 side of the base portion 411 of the heat sink 41.

(Heat sink 41)
FIG. 12 is a perspective view showing the configuration of a heat sink 41 according to the second embodiment. In FIG. 12, the main surface of the base portion 411 of the heat sink 41 on the Z2 side is shown facing upward. That is, FIG. 12 shows the heat sink 41 of FIG. 3 viewed from the Z2 side.

In the second embodiment, the main surface opposite to the Z1-side main surface on which the radiation fins 410 are provided is referred to as the Z2-side main surface or the second main surface of the base portion 411. In the second embodiment, as shown in FIG. 12, an insertion hole 4115 is provided in the main surface of the base portion 411 on the Z2 side. The insertion hole 4115 may be a through hole that penetrates the base portion 411, or may be a recess that does not penetrate the base portion 411. The other configuration of the heat sink 41 is the same as in the first embodiment.

(Wire stopper part 70)
FIG. 13 is a perspective view showing the configuration of the wire stopper 70 provided in the heat sink 41 according to the second embodiment. FIG. 14 is a side view showing the configuration of the wire stopper 70 provided in the heat sink 41 according to the second embodiment. Further, FIG. 15 is a perspective view showing a state in which the wire stopper 70 is attached to the heat sink 41 according to the second embodiment. Moreover, FIG. 16 is a perspective view showing a state in which the wire stopper part 70 and the light emitting part 21 are attached to the heat sink 41 according to the second embodiment.

As shown in FIG. 12, the wire stopper part 70 is inserted into an insertion hole 4115 formed in the base part 411 and fixed to the heat sink 41.

The wire stopper 70 is made of resin material. The wire fastening section 70 has an insertion section 71 and a stop section 72, as shown in FIGS. 13 and 14. The insertion part 71 and the stop part 72 are connected to each other. The insertion part 71 and the stop part 72 may be integrally molded from resin, or may be formed separately and then joined.

The insertion portion 71 is inserted into the insertion hole 4115. As shown in FIG. 13, the insertion portion 71 has a cross shape when viewed from the distal end side. The insertion portion 71 projects from the stop portion 72 in the Z1 direction. Further, as shown in FIG. 14, the tip of the insertion portion 71 is provided with a tapered slope so that the insertion portion 71 can be easily inserted into the insertion hole 4115 when viewed from the side. Therefore, the tip of the insertion portion 71 is the thinnest.

The stop portion 72 is a portion that protrudes from the base portion 411 when the wire stop portion 70 is attached to the base portion 411, as shown in FIG. The stop portion 72 has a cylindrical shape, as shown in FIG. As shown in FIG. 16, the light emitting section 21 is attached to the base section 411. At this time, the electric wire 80 for supplying power from the power supply device 50 to the light emitting section 21 is inserted inside the U-shaped notch 4111 provided in the base section 411, as shown in FIG. being pulled in the direction. A reflector 11 (see FIG. 3) is arranged on the Z2 side of the light emitting section 21. At this time, by providing the stop part 72, the stop part 72 comes into contact with the reflector 11, and a space is formed between the base part 411 and the reflector 11. Thereby, when the light source unit 40 is attached to the attachment part 10, it is possible to avoid pinching the electric wire 80 between the reflector 11 and the base part 411.

In the example of FIG. 16, the distance of the gap between the stopper 72 and the socket 211 almost matches the thickness of the electric wire 80. Therefore, the electric wire 80 is held between the stop portion 72 and the socket 211. In this case, it is possible to prevent the electric wire 80 from moving in an unintended direction, such as toward the outside. However, the distance of the gap between the stop portion 72 and the socket 211 is not limited to this.

Further, as shown in FIG. 14, the maximum width W1 of the insertion portion 71 is larger than the diameter D1 of the insertion hole 4115. When the insertion portion 71 is inserted into the insertion hole 4115, it deforms in the width direction due to insertion pressure. Specifically, the maximum width W1 of the insertion portion 71 becomes slightly smaller. Once the insertion part 71 is inserted into the insertion hole 4115, it tries to return to its original shape due to restoring force, so that the insertion part 71 and the inner surface of the insertion hole 411a come into close contact. This can prevent the insertion portion 71 from falling out of the insertion hole 4115.

As described above, the insertion portion 71 is formed in a cross shape. That is, the insertion part 71 has a central axis 71c extending perpendicularly from the stopper part 72 in the Z1 direction, protrusions 71a arranged radially in four directions from the central axis 71c, and a recess formed between the protrusions 71a. 71b. Each of the four directions differs by 90 degrees from the adjacent direction. Therefore, the four protrusions 71a are arranged at the same intervals in the circumferential direction, and the two adjacent protrusions 71a are arranged in directions orthogonal to each other.

When the insertion portion 71 is inserted into the insertion hole 4115, the portion that deforms due to insertion pressure is the protrusion 71a. Further, the recess 71b absorbs the deformed shape of the protrusion 71a.

Moreover, as shown in FIG. 14, the maximum width W2 of the stopper part 72 is larger than the maximum width W1 of the insertion part 71. Further, the maximum width W1 of the insertion portion 71 is larger than the diameter D1 of the insertion hole 4115. Therefore, there is a relationship of W2>W1>D1. This prevents the stop portion 72 portion from being embedded in the insertion hole 4115.

In addition, since the stopper part 72 is provided for the purpose of forming a space between the base part 411 and the reflector 11, it has strength and pressure resistance to the extent that it will not be crushed. Further, the height of the stop portion 72 in the Z1-Z2 direction is preferably higher than the maximum height of the light emitting portion 21 and greater than the thickness of the electric wire 80. When the stop portion 72 and the insertion portion 71 are made of the same material, it is desirable to use a resin that deforms in the width direction but does not deform in the axial direction.

In addition, although the case where the insertion part 71 is cross-shaped was demonstrated in Embodiment 2, it is not limited to this case. The insertion portion 71 may have any shape as long as it has a protrusion that deforms under insertion pressure and a recess that absorbs the deformed shape. For example, the insertion portion 71 may be formed into a star shape, or the insertion portion 71 may be formed into a cylindrical shape and the periphery thereof may be formed into a wave shape.

In addition, in Embodiment 2, it was explained that the tip of the insertion portion 71 has a tapered slope. A slope may also be provided around the opening of the insertion hole 4115. In that case, it becomes easier to insert the insertion portion 71 into the insertion hole 4115, and the operation becomes easier.

In addition, in Embodiment 2, it was explained that the maximum width W1 of the insertion portion 71 is formed larger than the diameter D1 of the insertion hole 4115. By using the insertion portion 71 having this configuration, even the heat sink 41 formed by forging such as cold forging can have a mechanism for holding the electric wire 80.

As shown in FIG. 3, when the light source unit 40 is attached to the reflector 11, the wire stopper part 70 is arranged to face the space between the outer cylinder part 112 and the inner cylinder part 113. Therefore, even if the wire stopper part 70 comes off from the heat sink 41, it will be accommodated in the space between the outer cylinder part 112 and the inner cylinder part 113. Therefore, the wire stopper 70 does not fall to the outside of the lighting fixture 100 and does not affect light distribution.

As described above, the heat sink 41 and the lighting fixture 100 according to the second embodiment basically have the same configuration as the heat sink 41 and the lighting fixture 100 according to the first embodiment, so they are different from the first embodiment. A similar effect can be obtained.

Furthermore, in the second embodiment, by providing the wire stopper 70, a space can be formed between the base part 411 and the reflector 11. This can prevent the electric wire 80 from being caught on the stopper 72 and moving unintentionally when the light source unit 40 is attached to the attachment section 10. Further, by the stop portion 72 coming into contact with the reflector 11, a space can be formed between the base portion 411 and the reflector 11. Thereby, it is possible to prevent the electric wire 80 from being caught between the reflector 11 and the base portion 411. Furthermore, the worker does not need to attach the light source unit 40 to the attachment part 10 while holding the electric wire 80, which facilitates the attachment work.

10 Mounting part, 11 Reflector, 12 Spring, 21 Light emitting part, 30 Lens, 40 Light source unit, 41 Heat sink, 50 Power supply, 51 Power supply unit, 52 Case body, 53 Lid part, 54 Terminal block, 54a Power terminal block, 54b Dimming terminal block, 60 connection parts, 61 connection parts, 70 wire stopper, 71 insertion part, 71a protrusion, 71b recess, 72 stopper, 80 electric wire, 100 lighting fixture, 111 reflection part, 112 outer cylinder part, Reference Signs List 113 inner cylinder part, 114 flange part, 211 socket, 212 insulating sheet, 213 light shielding sheet, 410 radiation fin, 411 base part, 412 pillar part, 413 fin part, 413A fin part, 414 shaft part, 415 locking part, 521 Arm part, 522 Main body bottom part, 523 Main body side part, 532 Lid bottom part, 533 Lid side part, 600 Mounted part, 601 Opening, 1121 Engagement hole, 1122 Outer convex part, 1131 Inner convex part, 2111 Light emitting board, 2131 opening, 4111 notch, 4112 mounting hole, 4113 power holding part, 4114 power holding hole, 4115 insertion hole, 4131 fin main part, 4131A fin main part, 4132 fin branch part, 4133 fin end, 4133A fin End portion, 4134 Detour portion, 5211 Projection, 5212 Attachment hole, 5213 Second projection.

Claims (8)

a mounting part that is attached to the mounted part;
a light source unit fixed to the mounting part and having a heat sink;
The heat sink is
a plate-shaped base portion fixed to the mounting portion;
a radiation fin provided on one main surface of the base portion and extending in a direction perpendicular to the main surface;
The base part has a mounting hole provided on the main surface into which a connecting part for fixing to the mounting part is inserted,
The radiation fins are arranged radially in a direction from a central portion of the main surface of the base portion toward an outer peripheral portion of the main surface in a plan view, and are arranged in a region where the mounting holes are provided. and arranged along the outer periphery of the mounting hole so that the head of the connecting part does not hit the connecting part .
lighting equipment. The heat dissipation fin is
a pillar portion disposed at the center portion of the main surface of the base portion;
a fin main portion connected to the column and arranged radially in a direction from the column toward the outer peripheral portion with the column as the center in a plan view;
fin end portions that are branched from the fin main portion, extend in a direction from the fin main portion toward the outer peripheral portion, and are arranged so as to be separated from each other in the direction;
provided on at least one of the fin main portion and the fin end portion, and arranged along the outer periphery of the mounting hole so as to be spaced apart from the outer periphery of the mounting hole so as to bypass the mounting hole. It has a detour part and
The lighting fixture according to claim 1. The tips of the fin end portions are arranged at equal intervals along the outer periphery of the base portion in plan view.
The lighting fixture according to claim 2. The fin main portions are arranged at equal intervals along the outer periphery of the pillar portion in plan view.
The lighting fixture according to claim 2 or 3. The light source unit is
A light emitting part that outputs light;
further comprising: a power supply device that supplies power to the light emitting section;
The power supply device is attached to the heat sink and arranged to extend toward the outside of the heat sink.
The lighting fixture according to any one of claims 1 to 4. The heat sink is
further comprising a wire stopper provided on a second main surface opposite to the main surface of the base part and protruding from the second main surface in a direction opposite to the direction in which the radiation fins extend;
The lighting fixture according to any one of claims 1 to 5. The wire stopper is
an insertion portion inserted into an insertion hole provided on the second main surface;
a stop portion connected to the insertion portion and protruding from the second main surface when the insertion portion is inserted into the insertion hole;
The lighting fixture according to claim 6. A plate-shaped base part,
a radiation fin provided on one main surface of the base portion and extending in a direction perpendicular to the main surface;
The base part has a mounting hole provided on the main surface and into which a connecting part for mounting is inserted,
The radiation fins are arranged radially in a direction from the central portion of the main surface of the base portion toward the outer peripheral portion in a plan view, and bypass the mounting hole in a region where the mounting hole is provided. , arranged along the outer periphery of the mounting hole so that the head of the connecting part does not hit ;
heat sink.

Images