JP2017021984A - Lighting fixture heat sink molding method and lighting fixture heat sink - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance cutting layout efficiency.SOLUTION: A method of molding a lighting fixture heat sink 16 provided with a plurality of inner radiation fins 32 and outer radiation fins 33 aligned along a semi-circle, comprises: punching a plate material to be fit with a shape in which a plurality of radiation elements 30 each including a contact part 31 coming into contact with a light source unit 7 and the inner radiation fin 32 and the outer radiation fin 33 extending in a band fashion across the contact part 31 are aligned in parallel and the adjacent contact parts 31 are continuous; bending and raising the inner radiation fins 32 and the outer radiation fins 33 with respect to the contact parts 31; bending the respective contact parts 31 along the semi-circle, and disposing the inner radiation fins 32 and the outer radiation fins 33 along the semi-circle.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a technique for forming a heat sink for a lighting fixture.

An illumination device including a semiconductor light emitting element such as an LED includes a plate-shaped base and a cylindrical case for housing the base, the LED is disposed on one surface of the base, and a heat sink is disposed on the other surface. Some are arranged (Patent Document 1).
This heat sink has a plurality of fins erected on the other surface of the base so as to surround the cylindrical shaft of the case.

JP 2014-170672 A

In the technique of Patent Document 1, a heat sink is formed by cutting and raising the outer periphery of a single plate member to form a plurality of fins.
However, in the development view in which the heat sink is cut open and developed in the plane of a single plate, a plurality of fins are radially spread and arranged, so that a material plate having a large area is taken up when the plate is taken. The efficiency of material removal is poor.
Then, an object of this invention is to provide the shaping | molding method of the heat sink for lighting fixtures, and the heat sink for lighting fixtures in which the efficiency of material picking is improved.

  In order to solve the above-mentioned problems, the present invention provides a method for forming a heat sink for a luminaire comprising a plurality of heat dissipating fins arranged along a curve, a contact portion that contacts a light source portion, and heat dissipation that extends from the contact portion in a strip shape. A plurality of heat dissipating elements having fins are arranged in parallel, and a plate material is punched in accordance with the shape in which the adjacent contact portions are connected, and each of the heat dissipating fins is bent with respect to the contact portions to stand up, Each of the contact portions is bent along a curve, and the radiation fins are arranged along the curve.

  Moreover, the present invention is characterized in that, in the method for forming a heat sink for a lighting fixture, the heat dissipating element includes two heat dissipating fins extending in a band shape with the contact portion interposed therebetween.

  Moreover, the present invention is characterized in that, in the method for forming a heat sink for a lighting fixture, a width closer to a center of curvature of the curve is narrower than a far side among two radiating fins facing each other with the contact portion interposed therebetween. And

  Further, in the method of forming a heat sink for a lighting fixture according to the present invention, the height of the side close to the center of curvature of the curve is higher than the far side of two radiating fins facing each other across the contact portion. Features.

  The present invention also relates to a heat sink for a lighting fixture including a plurality of heat radiation fins arranged along a curve, a contact portion having a contact surface that contacts the light source portion, and the contact surface extending in a band shape from the contact surface of the contact portion A plurality of heat dissipating elements having heat dissipating fins bent with respect to each other, each of the heat dissipating elements being arranged side by side at the contact portion, and between the contact portions being bent along a curve. The radiating fin is disposed along the curve, and a bending recess having an open end is provided between the contact portions on the center side of the curvature of the curve, and the open end is closed to close the open end. The bending recess is bent.

According to the present invention, a plurality of heat dissipating elements having a contact part that contacts the light source part and a heat dissipating fin extending in a strip shape from the contact part are arranged in parallel, and the plate material is matched to the shape in which the adjacent contact parts are connected. Is processed.
Thereby, compared with the conventional configuration in which the radiating fins are arranged in a radial pattern, the area between the radiating fins is narrowed and the portion that is wasted is reduced, so that the efficiency of material collection is increased.

It is a perspective view which shows the structure of the high ceiling lighting fixture which concerns on embodiment of this invention. It is an exploded view of a high ceiling lighting fixture. It is a perspective view of the heat sink for lighting fixtures, (A) is the perspective view seen from the inner side of the heat sink for lighting fixtures, (B) is the perspective view seen from the outer side of the heat sink for lighting fixtures. It is an expanded view of the heat sink for lighting fixtures. It is a figure which shows the structure of the 2nd intermediate molding material of the heat sink for lighting fixtures obtained by the fin bending process.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In this embodiment, a high ceiling lighting fixture will be described as an example of a lighting fixture according to the present invention. Ceiling light fixtures are devices that are installed suspended from the ceiling surface of a building to illuminate the interior of a room, and high ceiling light fixtures are used in factories or other places where the ceiling height in the room is larger than general living rooms such as dwelling units and offices. Equipment installed on the ceiling of warehouses, gymnasiums, etc.

FIG. 1 is a perspective view showing a configuration of a high ceiling lighting fixture 1 according to this embodiment, and FIG. 2 is an exploded view of the high ceiling lighting fixture 1.
As shown in FIG. 1, the high ceiling lighting device 1 includes a lighting device body 2 and a support portion 4.
The luminaire main body 2 has a bottomed cylindrical casing 6, and the casing 6 accommodates a light source unit 7 that is an example of a light source unit that emits illumination light. An exit opening 5 is provided at one end of the housing 6, and illumination light from the light source unit 7 is irradiated from the exit opening 5.
The support unit 4 is a member that supports the lighting fixture body 2 in a state of being hung from the ceiling surface that is the installation surface, and includes a fixing unit 8 and a support member 9. The fixing portion 8 is fixed to the installation surface with screws or the like. The support member 9 is a member that supports the luminaire main body 2 on the fixing portion 8, and includes a rod-like portion 11 having one end coupled to the fixing portion 8 with a screw. The luminaire main body 2 is coupled to the other end of the rod-shaped portion 11.
The support member 9 may be a chain member instead of the rod-shaped portion 11. The installation surface of the high ceiling lighting device 1 may be a wall surface.

The high ceiling lighting fixture 1 includes a power supply unit (not shown) that supplies power to the lighting fixture body 2. A high ceiling lighting fixture 1 shown in FIG. 1 is a so-called power supply type fixture in which a power supply unit is provided at a position away from the lighting fixture main body 2.
The high ceiling lighting device 1 may be a power supply integrated type in which a power supply unit is provided in the lighting device body 2.

As shown in FIG. 2, the lighting fixture body 2 includes a unit support bar 14 and two heat sinks 16 and 16 for lighting fixtures in addition to the housing 6 and the light source unit 7.
The unit support bar 14 is a bar-shaped member that supports the light source unit 7 in the housing 6, and is disposed coaxially with a cylindrical shaft (not shown) that is the central axis of the housing 6. Unit 7 is fixed.
The unit support bar 14 may be connected to the bar-shaped part 11 of the support member 9. Further, the rod-shaped portion 11 may extend into the housing 6, and the extended portion may be used as the unit support rod 14.

  The light source unit 7 includes a mounting substrate 20, LEDs 22, and a globe 24. The mounting board 20 is a board on which the LEDs 22 are mounted. The mounting substrate 20 has a disk shape, and an insertion hole 28 is provided at the center. The distal end portion 14A of the unit support rod 14 is inserted into the insertion hole 28, and the distal end portion 14A and the mounting board 20 are coupled by a coupling member such as a nut.

The LED 22 is an example of a light emitting element that can be used in the light source unit 7. On the mounting surface 20 </ b> A of the mounting substrate 20, a plurality (four in the illustrated example) of LEDs 22 are arranged at equal intervals around the insertion hole 28 (that is, the center of the mounting substrate 20).
In addition, as the light emitting elements used in the light source unit 7, a suitable number of types according to light performance such as required light quantity, light distribution, and color rendering properties are used.

  The globe 24 is a member made of a resin material or a glass material provided with a globe portion 24A that covers each LED 22 and a flange portion 24B that is integrally provided at the edge of the globe portion 24A. The globe 24 has a flange portion 24B fixed to the mounting surface 20A of the mounting substrate 20 with screws.

The two lighting fixture heat sinks 16 and 16 are provided in contact with the surface of the mounting substrate 20 of the light source unit 7 opposite to the mounting surface 20A, and the heat generated by the LEDs 22 transmitted through the mounting substrate 20 is generated. Dissipate heat. Note that a heat transfer material such as a heat transfer sheet or a heat transfer material may be interposed between the two heat sinks 16 and 16 for the lighting fixture and the mounting substrate 20. Moreover, this heat transfer material may have electrical insulation.
The two luminaire heat sinks 16, 16 have the same size and shape. Below, the heat sink 16 for lighting fixtures is demonstrated as a representative.

3 is a perspective view of the heat sink 16 for a lighting fixture, FIG. 3 (A) is a perspective view seen from the inside of the heat sink 16 for lighting fixture, and FIG. 3 (B) is a perspective view seen from the outside of the heat sink 16 for lighting fixture. is there.
The luminaire heat sink 16 includes a plurality of heat radiating elements 30 provided along a semicircular curve, and each heat radiating element 30 includes a contact portion 31, an inner radiating fin 32, and an outer radiating fin 33. I have.

The contact portion 31 has a flat plate shape. When the lighting fixture heat sink 16 is mounted on the mounting surface of the mounting substrate 20 (the surface opposite to the mounting surface 20A), the mounting surface or a transmission provided on the mounting surface is provided. It has a contact surface 31A that makes surface contact with the heat material. The heat of the LED 22 is transmitted to the heat sink 16 for lighting equipment through the contact surface 31A. This contact portion 31 is also used for fixing the heat sink 16 for a lighting fixture. Specifically, the contact surface 31A of the contact portion 31 is fixed to the mounting substrate 20 with a heat conductive adhesive, or the contact surface 31A is fixed to the mounting substrate 20 with screws.
The inner radiating fin 32 and the outer radiating fin 33 are elongated plate-like radiating fins extending from the contact portion 31. The inner radiating fins 32 and the outer radiating fins 33 are connected to the contact portion 31 at positions facing each other and extend perpendicular to the contact surface 31A.

Each of the heat dissipating elements 30 of the heat sink 16 for lighting fixtures is connected side by side at the contact portion 31, and as described above, the row where the heat dissipating elements 30 are continuous describes a semicircle centered on the cylinder axis of the housing 6. Yes. Thereby, by disposing the two heat sinks 16 for lighting fixtures so as to face each other, the heat dissipating elements 30 are arranged at equal intervals on the entire circumference of the cylindrical shaft.
Moreover, the inner side radiation fin 32 and the outer side radiation fin 33 are also arrange | positioned along a semicircle by arranging the thermal radiation element 30 along a semicircle. In this arrangement, the inner radiating fins 32 are arranged on the side close to the center of the semicircle (that is, the cylinder axis of the housing 6), and the outer radiating fins 33 are arranged on the side far from the center of the semicircle. That is, in the housing 6, the inner radiating fins 32 and the outer radiating fins 33 are arranged concentrically around the tube axis, and the heat of the LED 22 is radiated in each case.
In addition, the distance from the center of these inner side radiating fins 32 and the outer side radiating fins 33 may be a length at which these are arranged at positions corresponding to the respective LEDs 22 on the mounting surface 20A.

Further, the length La (FIG. 3A) from the contact surface 31 </ b> A of the inner radiating fin 32 is longer than the length Lb (FIG. 3B) of the outer radiating fin 33, and the tip 32 </ b> A of the inner radiating fin 32. Protrudes from the front end portion 33 </ b> A of the outer radiating fin 33.
Thereby, even if the inner heat radiating fin 32 is surrounded by the outer heat radiating fin 33, the tip end portion 32 </ b> A of the inner heat radiating fin 32 protrudes from the outer heat radiating fin 33. Good heat dissipation.

  This heat sink 16 for lighting equipment is formed from a plate material excellent in thermal conductivity. For this plate material, a metal material such as aluminum that can be easily bent is used. The heat sink 16 for lighting fixtures is formed through a punching process from the plate material and a bending process for the extracted plate material.

FIG. 4 is a development view used for punching out the heat sink 16 for a lighting fixture.
As shown in this figure, in the development view of the heat sink 16 for lighting equipment, the heat dissipating elements 30 are arranged side by side. Specifically, in the developed view, the heat dissipating element 30 has an inner heat dissipating fin 32 and an outer heat dissipating fin 33 extending on the same straight line M across the contact part 31. Thereby, the heat radiating element 30 has comprised the strip | belt shape extended in the direction of the straight line M entirely. In the developed view, a plurality of strip-shaped heat dissipation elements 30 are arranged in parallel, and adjacent contact portions 31 are connected and connected.

  Thus, in the development view of the heat sink 16 for a lighting fixture, the inner radiating fin 32 and the outer radiating fin 33 extend from the contact portion 31 in a band shape. As a result, the area of the region S between the adjacent inner radiating fins 32 and the outer radiating fins 33 becomes smaller than in the conventional configuration in which the fins extend radially from the contact portion 31, and is wasted when material is taken from the plate material. There are few parts, and material picking efficiency is improved.

In the molding process of the heat sink 16 for lighting equipment, a punching process is performed on a single plate material having high thermal conductivity and easy to bend in accordance with the shape shown in the developed view of FIG. By this punching process, the first intermediate molding material 16A (FIG. 4) of the heat sink 16 for the lighting fixture having the shape shown in the development view of FIG. 4 is obtained.
In this punching process, laser cutting, punching using a mold, or any other punching process is used.

Next, a fin bending process is performed on the first intermediate molding material 16A of the heat sink 16 for the lighting fixture so that each of the inner radiating fin 32 and the outer radiating fin 33 is bent vertically to the contact portion 31 in the same direction. Is called.
Accordingly, as shown in FIG. 5, in the heat dissipating element 30, the inner heat dissipating fins 32 and the outer heat dissipating fins 33 face each other across the contact part 31, and the plurality of heat dissipating elements 30 are arranged side by side at the contact part 31. The 2nd intermediate molding material 16B of the continuous heat sink 16 for lighting fixtures is obtained.

And the contact part bending process which bends between each contact part 31 along a semicircle with respect to the 2nd intermediate molding material 16B of the heat sink 16 for lighting fixtures is performed, and the completion body of the heat sink 16 for lighting fixtures is obtained. .
With this contact part bending process, the inner side radiation fin 32 and the outer side radiation fin 33 are also arrange | positioned along a semicircle.
In addition, the order of a fin bending process and a contact part bending process is suitable, and you may carry out simultaneously.

Here, the heat sink 16 for lighting fixtures is provided with a bending recess 36 cut into a triangular shape at a bent portion between the contact portions 31 of the heat dissipating elements 30. By providing the bending concave portions 36 between the adjacent contact portions 31, the contact portions 31 are easily bent around the bending concave portions 36.
In this method of forming the heat sink 16 for lighting equipment, the bending recess 36 is provided in advance on the first intermediate molding material 16A of the heat sink 16 for lighting equipment obtained by punching. However, the process of forming the bending recess 36 may be provided separately from the punching process.

Between the contact parts 31 of each heat radiating element 30, the bending recessed part 36 is provided in the side close | similar to the center (cylindrical axis) of the semicircle along which each heat radiating element 30 is followed. That is, the open end 36A of the bending recess 36 is provided facing the center of the semicircle.
And in the contact part bending process, the contact part 31 of each heat radiating element 30 is arranged along a curve by bending each bending recessed part 36 so that the open end 36A may be closed.
Thus, in the contact part bending process, the open end 36A of the bending recess 36 is closed. As a result, compared with a configuration in which the open end 36A of the bending recess 36 faces away from the center of the semicircle and the open end 36A of the bending recess 36 is bent in the opening direction, the contact portion is formed by the bending recess 36 in the finished body. The gap generated between 31 is reduced.
Therefore, since the adjacent contact portions 31 are densely arranged and contact the mounting substrate 20, heat transfer from the LED 22 to the lighting fixture heat sink 16 is favorably maintained.

Further, since the shape of the bending recess 36 is triangular, the contact surface 31A has a trapezoidal shape (more precisely, an isosceles trapezoidal shape). And the inner side radiation fin 32 is connected to the short side of the two bottom sides of the trapezoidal contact surface 31A with the length of the bottom side as a width Wa (FIG. 4), and the length of the bottom side is similarly set to the long side. The outer heat radiating fins 33 are continuous as a width Wb (FIG. 4).
That is, since the width Wa of the inner radiating fin 32 is narrower than the width Wb of the outer radiating fin 33, the side close to the center (cylindrical axis) of the semicircle even when bent along the semicircle in the contact portion bending process. Interference between the inner radiating fins 32 located at the center is prevented. On the other hand, the gap between the outer radiation fins 33 located on the side far from the center of inversion is suppressed to a small value.
Further, as described above, since the height La of the inner radiation fin 32 is longer than the height Lb of the outer radiation fin 33, a sufficient heat radiation area is ensured even when the width Wa is reduced, and sufficient heat radiation is achieved. Performance is obtained.

As described above, according to the present embodiment, the following effects are obtained.
In the present embodiment, in the molding process of the lighting fixture heat sink 16, the first intermediate molding material 16A of the lighting fixture heat sink 16 is obtained by punching the plate material. The shape of the first intermediate molding material 16 </ b> A of the heat sink 16 for lighting equipment is such that a plurality of heat dissipating elements 30 having a contact portion 31, an inner heat dissipating fin 32 extending from the contact portion 31 in a band shape, and an outer heat dissipating fin 33 are arranged in parallel. And the adjacent contact portions 31 are arranged in a row.
As a result, the area of the region S between the adjacent inner radiating fins 32 and the outer radiating fins 33 becomes smaller than in the conventional configuration in which the fins extend radially from the contact portion 31, and is wasted when material is taken from the plate material. There are few parts, and material picking efficiency is improved.

Moreover, in this embodiment, the heat radiating element 30 of the heat sink 16 for lighting fixtures includes an inner radiating fin 32 and an outer radiating fin 33 that extend in a band shape with the contact portion 31 interposed therebetween.
Thereby, the heat sink 16 for lighting fixtures in which heat dissipation was improved by providing the two radiation fins of the inner radiation fin 32 and the outer radiation fin 33 is obtained.

Moreover, in this embodiment, the width | variety of the inner side radiation fin 32 arrange | positioned among the inner side radiation fin 32 and the outer side radiation fin 33 which oppose on both sides of the contact part 31 at the side near the center (cylinder axis) of a semicircle curve. Wa is narrower than the width Wb of the outer radiation fin 33 arranged on the far side.
Thereby, even if it bends between the contact parts 31 along a semicircle in a contact part bending process, interference of the inner side radiation fins 32 arrange | positioned at the side (inner peripheral side) near the center (cylinder axis) of a semicircle Is prevented. On the other hand, the gap between the outer radiating fins 33 arranged on the side farther from the center of inversion (outer peripheral side) can be kept small.

In the present embodiment, among the inner radiating fins 32 and the outer radiating fins 33 that are opposed to each other with the contact portion 31 interposed therebetween, the height of the inner radiating fins 32 disposed on the side closer to the center (cylindrical axis) of the semicircular curve. The length La is higher than the height Lb of the outer radiation fin 33 disposed on the far side.
Thereby, even if the width | variety Wa becomes narrower than the outer side radiation fin 33, the inner side radiation fin 32 ensures a sufficient thermal radiation area, and sufficient thermal radiation performance is obtained.

Moreover, in the heat sink 16 for lighting fixtures of this embodiment, the bending recessed part 36 which has the open end 36A is provided in the bending part between each of the contact parts 31 in the center (cylinder axis) side of the curve of a semicircle. The bending recess 36 is bent so as to close the open end 36A.
As a result, compared with a configuration in which the open end 36A of the bending recess 36 faces away from the center of the semicircle and the open end 36A of the bending recess 36 is bent in the opening direction, the contact portion is formed by the bending recess 36 in the finished body. The gap generated between 31 is reduced. Therefore, since the adjacent contact portions 31 are densely arranged and contact the mounting substrate 20, heat transfer from the LED 22 to the lighting fixture heat sink 16 is favorably maintained.

  The above-described embodiment is merely an example of one aspect of the present invention, and can be arbitrarily modified and applied within the scope of the gist of the present invention.

  In the embodiment described above, the plurality of heat dissipating elements 30 (the inner heat dissipating fins 32 and the outer heat dissipating fins 33) of the heat sink 16 for a lighting fixture are arranged along a semicircle. However, it is not limited to a semicircle, and may be arranged along an arbitrary curve such as an arc. In this case, the center of curvature of the curve corresponds to the center (cylindrical axis) of the semicircle in the embodiment.

  In the embodiment described above, the plurality of heat dissipating elements 30 of the heat sink 16 for a lighting fixture may have cuts at the connection portions between the contact portion 31, the inner heat dissipating fins 32, and the outer heat dissipating fins 33. Due to this cut, it is possible to bend the inner radiating fin 32 and the outer radiating fin 33 in a radial direction of the curve.

  The lighting fixture provided with the heat sink 16 for lighting fixtures is not restricted to the high ceiling lighting fixture 1. FIG. That is, the luminaire heat sink 16 can be used in any luminaire provided in the light source part with a surface that contacts the contact surface 31A of the luminaire heat sink 16.

1 High ceiling lighting equipment (lighting equipment)
7 Light source unit (light source part)
16 Heat sink for lighting equipment 16A First intermediate molding material 16B Second intermediate molding material 20 Mounting substrate 20A Mounting surface 22 LED
30 Heat Dissipation Element 31 Contact Part 31A Contact Surface 32 Inner Heat Dissipation Fin (Heat Dissipation Fin)
33 Outer radiation fin (radiation fin)
36 Bending recess 36A Open end

Claims (5)

In a method for forming a heat sink for a lighting fixture comprising a plurality of heat dissipating fins arranged along a curve,
A plurality of heat dissipating elements having a contact part that contacts the light source part and a heat dissipating fin extending in a strip shape from the contact part are arranged in parallel, and the plate material is punched according to the shape in which the adjacent contact parts are connected,
Bend each of the radiating fins with respect to the contact part,
Each of the contact portions is bent along a curve, and the heat dissipating fins are arranged along the curve. The heat dissipating element includes two heat dissipating fins extending in a band shape across the contact portion.
The method for forming a heat sink for a lighting fixture according to claim 1. The method for forming a heat sink for a lighting fixture according to claim 2, wherein, of the two radiating fins facing each other with the contact portion interposed therebetween, the width near the center of curvature of the curve is narrower than the far side. . The heat sink for a luminaire according to claim 2 or 3, wherein, of two radiating fins facing each other with the contact portion interposed therebetween, a height closer to a center of curvature of the curve is higher than a far side. Molding method. In a heat sink for a lighting fixture comprising a plurality of heat radiation fins arranged along a curve,
A plurality of heat dissipating elements having a contact portion having a contact surface that contacts the light source portion, and a heat dissipating fin extending from the contact surface of the contact portion in a band shape and bent with respect to the contact surface;
Each of the heat dissipation elements is
The contact portions are arranged side by side, and the space between each of the contact portions is bent along a curve, and the radiation fins are arranged along the curve,
Between each of the contact portions, a bending concave portion having an open end is provided on the center side of the curvature of the curve, and the bending concave portion is bent so as to close the open end. Heat sink for lighting equipment.

Images