JP5725109B2 - Lighting device - Google Patents

Description

The present invention relates to an illumination device using, for example, an LED (Light Emitting Diode).
About.

  As a conventional technique, an illumination device using an LED as a light source is widely known. In general, when the temperature of the LED increases, the light emission efficiency decreases and the lifetime tends to be shortened. For this reason, the illumination device of the prior art is equipped with a heat sink for radiating heat from the LED. Specifically, for example, in the conventional technique described in Patent Document 1, one heat sink is mounted on one lighting device. Moreover, in the prior art described in Patent Documents 2 and 3, a heat sink is mounted on each light source mounted on the lighting device.

  On the other hand, some lighting devices using LEDs have a large number of LEDs mounted, such as a ceiling light with a high luminous flux for a high ceiling. For example, about 100 normal 1W type surface mount LEDs are mounted on a 100 W class lighting device. Such a large luminous flux illuminating device is preferably mounted with a large heat sink having a plurality of heat dissipating fins in order to enhance the heat dissipation of each LED.

JP 2005-276467 A Japanese Patent No. 4805347 JP 2009-289906 A

  In the prior art described in Patent Document 1 described above, one heat sink is mounted on one lighting device. However, in this case, there is a problem that it is difficult to appropriately set the shape and arrangement of each heat radiation fin of the heat sink for each LED when an illumination device with a large luminous flux is configured. In particular, in a ceiling light for a high ceiling with a large luminous flux, when the number of LEDs increases, it becomes difficult to adapt each radiating fin of the heat sink that has been increased in size to a wind flow caused by natural convection.

  Moreover, in a ceiling light for high ceilings with a large luminous flux, the substrate on which the LED is mounted and the heat sink are often formed of aluminum or the like, so an insulating sheet needs to be interposed between the two and the heat sink from the substrate. However, it is difficult to conduct heat efficiently. On the other hand, in the prior arts described in Patent Documents 2 and 3, although heat sinks are arranged for each light source, only a plurality of heat sinks having the same shape are arranged, and the wind flow generated by natural convection is provided. There is a problem that it is not considered.

  The present invention has been made to solve the above-described problems. For example, even when a plurality of light sources are mounted, a lighting device capable of optimizing the structure of the heat dissipating fins and improving heat dissipation. The purpose is to provide.

An illumination device according to the present invention includes a light source unit on which a light source for irradiating light is mounted, a heat sink base that is attached to the light source unit and dissipates heat generated from the light source unit , and is provided on the heat sink base. A plurality of fin mounting portions having different angles, and a heat dissipating fin that is attached to at least a part of the plurality of fin mounting portions and radiates heat of the light source unit together with the heat sink base. Among them, by changing the fin mounting portion to which the heat radiating fin is attached, it is possible to assemble a plurality of types of lighting devices using one type of heat sink base.

  ADVANTAGE OF THE INVENTION According to this invention, the multiple types of illuminating device from which the position and angle of a radiation fin with respect to a light source differ can be assembled easily. Further, since the heat sink base and the heat radiating fins are formed as separate parts, the number of heat radiating fins mounted on one lighting device can be easily changed. Thereby, for example, according to the calorific value, heat distribution, etc. of the light source, the number, arrangement, and orientation of the radiating fins can be appropriately set to improve the heat dissipation.

It is the external view which looked at the illuminating device by Embodiment 1 of this invention from the front side. It is the perspective view which looked at the illuminating device shown in FIG. 1 from the rear surface side. It is the external view which looked at the heat sink stand and the radiation fin shown in FIG. 2 from the side. It is the external view which looked at the heat sink stand by Embodiment 1 of this invention independently from the rear surface side. In Embodiment 1 of this invention, it is the perspective view which looked at the illuminating device which changed the attachment position of the radiation fin from diagonally back. It is the external view which looked at the heat sink stand and the radiation fin shown in FIG. 5 from the side. In Embodiment 1 of this invention, it is an external view similar to FIG. 1 which shows the modification at the time of using high watt type LED. It is the external view which looked at the illuminating device by Embodiment 2 of this invention from the rear surface side. It is the external view which looked at the illuminating device by Embodiment 3 of this invention from the rear surface side. It is the perspective view which looked at the illuminating device by Embodiment 4 of this invention from the front side. It is the external view which looked at the illuminating device shown in FIG. 10 from the front side. It is the external view which looked at the illuminating device shown in FIG. 10 from the rear surface side. It is the external view which looked at the illuminating device by Embodiment 5 of this invention from the front side. It is the external view which looked at the illuminating device by Embodiment 6 of this invention from the front side. It is the external view which looked at the illuminating device by Embodiment 7 of this invention from the front side.

  Embodiments of the present invention will be described below. In each drawing used in this specification, common elements are denoted by the same reference numerals, and redundant description is omitted.

Embodiment 1 FIG.
1 is an external view of the lighting device according to Embodiment 1 of the present invention as seen from the front side, and FIG. 2 is a perspective view of the lighting device as seen from the rear side. As shown in these drawings, the illumination device 1 according to the present embodiment includes a light source mounting plate 2, an LED 3, a substrate 4, a heat sink base 5, a radiation fin 6, and the like. The light source mounting plate 2, the LED 3, and the substrate 4 constitute a light source unit disposed on the front side of the lighting device 1, and the heat sink base 5 and the heat radiation fin 6 are disposed on the rear surface side of the lighting device 1. Is configured.

  The light source mounting plate 2 constitutes the base of the light source unit, and is formed of, for example, a rectangular metal plate. On the front surface (front surface) side of the light source mounting plate 2, a plurality of LEDs 3 that are light sources for irradiating light are mounted via a substrate 4. In the present embodiment, for example, a low watt type LED 3 that operates with relatively small electric power is used, and a plurality of LEDs 3 are mounted on the surface of a square substrate 4 in a grid pattern. A plurality of substrates 4 are mounted on the surface of the light source mounting plate 2 at intervals. When both the light source mounting plate 2 and the substrate 4 are formed of a metal material, it is necessary to insulate the light source mounting plate 2 and the substrate 4 by disposing an insulating material such as an insulating sheet therebetween. When an insulating sheet is used, the light source mounting plate 2 and the substrate 4 can be brought into close contact with each other to improve the thermal conductivity between them.

  Next, with reference to FIG. 2 thru | or FIG. 4, the thermal radiation part of the illuminating device 1 is demonstrated. Here, FIG. 3 is an external view of the heat sink base and the radiation fin shown in FIG. 2 as viewed from the side, and FIG. 4 is an external view of the heat sink base as viewed from the rear side. The heat sink base 5 constitutes the base of the heat radiating portion, and is formed of, for example, a metal plate having the same shape as the light source mounting plate 2 and attached in a state of being overlapped on the back surface (rear surface) side of the light source mounting plate 2. Yes. The heat sink base 5 is formed with a plurality of screw holes 5A and 5B to which the heat radiating fins 6 are attached.

  The heat sink base 5 and the heat radiating fins 6 radiate heat generated from the light source unit including each LED 3, and the heat radiating fins 6 are made of, for example, a rectangular flat metal plate. One side which is the base end side of the radiating fin 6 is formed to be bent in an L shape, and a screw hole (not shown) to be screwed to the screw holes 5A and 5B of the heat sink base 5 is formed in this bent portion. ing. As shown in FIG. 2 and FIG. 5 to be described later, the radiating fin 6 protrudes in a state where the base end side is detachably attached to the heat sink base 5 so as to stand vertically from the back side of the heat sink base 5. The heat generated from the portion is efficiently radiated to the surrounding space.

  Here, as shown in FIG. 4, for example, the plurality of screw holes 5A are arranged at intervals in the D1 direction parallel to one side of the heat sink base 5, and are arranged side by side in the D2 direction orthogonal to the D1 direction. In other words, the heat sink base 5 includes a plurality of screw holes 5A spaced in the D1 direction as a set, and a plurality of sets of screw holes 5A arranged in the D2 direction. And in the illuminating device 1, as shown in FIG.2 and FIG.3, the several thermal radiation fin 6 is each attached to 5A of screw holes of each group by screwing. These heat radiating fins 6 extend in the D1 direction parallel to one side of the heat sink base 5, and are arranged at intervals in the D2 direction.

  On the other hand, the plurality of screw holes 5B are arranged at intervals in the D3 direction inclined with respect to the D1 direction, and are arranged side by side in the D4 direction orthogonal to the D3 direction. Here, the D3 direction may be set as a direction parallel to the diagonal line of the heat sink base 5. In the heat sink base 5, a plurality of screw holes 5B spaced from each other in the D3 direction are set as one set, and a plurality of sets of screw holes 5B are arranged in the D4 direction. And the radiation fin 6 can be attached to each set of screw holes 5B as will be described later. As described above, the screw holes 5A and 5B of the heat sink base 5 constitute two fin attachment portions having different positions or angles with respect to the LED 3, and the screw holes 5A correspond to the first fin attachment portions. 5B corresponds to the second fin mounting portion.

  With the above configuration, when the heat radiating fins 6 are attached to the screw holes 5B of the heat sink base 5, the lighting device 1 'shown in FIGS. 5 and 6 can be assembled. 5 is a perspective view of the illuminating device in which the mounting position of the radiating fin is changed obliquely from the rear in Embodiment 1 of the present invention, and FIG. 6 is a side view of the heat sink base and the radiating fin shown in FIG. FIG. As shown in these drawings, in the lighting device 1 ′, a plurality of radiating fins 6 are respectively attached to the screw holes 5 </ b> B of each set by screwing. These radiating fins 6 extend in the direction D3 parallel to the diagonal line of the heat sink base 5, and are arranged at intervals in the direction D4.

  Note that the screw hole 5A (5B) shown in FIG. 4 is a combination of the screw hole 5A and the screw hole 5B. Further, a counterbore hole for embedding a nut may be formed in the heat sink base 5 on the surface side of the opening portion of the screw holes 5A and 5B. Thereby, the radiation fin 6 can be fixed to the heat sink base 5 using a bolt and a nut.

  As described above in detail, according to the present embodiment, by using the screw holes 5A and 5B of the heat sink base 5 properly, the two types of lighting devices 1 and 1 ′ having different positions and angles of the radiation fins 6 with respect to the LEDs 3 can be easily obtained. Can be assembled. Moreover, since the heat sink base 5 and the heat radiating fins 6 are formed as separate parts, the number of the heat radiating fins 6 mounted on one lighting device 1, 1 ′ can be easily changed. Thereby, the number, arrangement, and orientation of the radiation fins 6 can be appropriately set according to, for example, the size of the light source mounting plate 2, the number of LEDs 3 mounted, the total power consumption, and the like.

  Specifically, in the present embodiment, the radiation fins 6 can be attached in parallel with one side of the heat sink base 5 or in parallel with the diagonal line. Thereby, the direction of the radiation fin 6 can be made to correspond to the direction of air convection caused by the heat of the LED 3, for example, and the heat of the LED 3 can be efficiently radiated using the air convection. In addition, since the heat sink base 5 and the heat radiating fin 6 can be used as a common part, a plurality of types of heat radiating parts can be assembled, so there is no need to form a dedicated heat sink or the like having a different shape for each of the lighting devices 1 and 1 '. It is possible to form a heat radiating portion having an optimum shape in terms of the number of points, and to improve the heat radiating properties of the lighting devices 1 and 1 '.

  In the present embodiment, the heat radiation fins 6 may be extended in the diagonal direction of the heat sink base 5 as shown in FIG. it can. Thereby, not only the convection of the heat generated from the LED 3 can be taken into consideration, but also the direction of the radiation fin 6 can be determined by the aesthetic appearance of the lighting devices 1 and 1 ′ arranged on the wall surface or the like. That is, for example, it is possible to avoid a decrease in aesthetic appearance by disposing the radiating fins 6 obliquely with respect to the wall surface or the like.

  In the present embodiment, screw holes 5A and 5B serving as fin attachment portions are provided in the heat sink base 5, and the heat radiation fins 6 are attached to the heat sink base 5 by screwing. However, the present invention is not limited to this, and a long groove serving as a fin mounting portion may be formed in the heat sink base, and the heat radiating fin may be fitted into the long groove to be attached to the heat sink base.

  Moreover, in this Embodiment, the case where one kind of radiation fin 6 was attached to the heat sink base 5 was illustrated. However, in the present invention, the radiation fins 6 are configured as individual parts that can be attached to and detached from the heat sink base 5, so that a plurality of types of radiation fins 6 having different shapes or areas are attached to one heat sink base 5. It is good also as a structure. As a specific example, in the portion where the LEDs 3 are densely arranged, the heat radiation efficiency is improved by attaching the heat radiation fin 6 having a large projecting dimension (height dimension) or area from the heat sink base 5 to the heat sink base 5. May be. Moreover, in the part where LED3 is not crowded, you may attach to the heat sink base 5 the radiation fin 6 with a comparatively small height dimension or area. As described above, according to the present embodiment, the heat dissipating fins 6 of each part can be formed to a minimum size according to the heat distribution of the LED 3 and so on, so that the heat dissipating part can be easily reduced in size and weight. An apparatus can be realized.

  Further, as a material of the heat radiating portion (heat sink), it is preferable to use a metal material having a high thermal conductivity such as aluminum. However, when the shape of the heat radiating portion is complicated, the heat radiating portion is generally formed using aluminum die casting or the like having a relatively low thermal conductivity. On the other hand, in this embodiment, since the heat sink base 5 and the heat radiating fin 6 are configured as separate parts, the shape of the heat radiating fin 6 is set to a simple shape that can be extruded, and a metal such as aluminum is used. The heat radiation fin 6 with high heat conductivity can be formed using a material.

  Further, in the present embodiment, the heat sink base 5 and the heat radiating fins 6 may be formed of different types of metal materials. As a specific example, the radiating fins 6 may be formed of aluminum, and the heat sink base 5 may be formed of copper having higher thermal conductivity than aluminum. Thereby, the thermal conductivity of the heat radiating portion can be increased in the direction along the plane including the heat sink base 5 while suppressing the cost increase of the heat radiating portion. Therefore, the heat radiation performance, cost, strength, etc. of the heat radiation part can be improved in a well-balanced manner.

  In the first embodiment, the case where the low wattage type LED 3 is used is exemplified. However, as in the modification shown in FIG. 7, the present invention may use, for example, a high watt type LED 3 ′ configured by COB (chip on board) as the light source of the illumination device 1 ″. FIG. 7 is an external view similar to FIG. 1 showing a modification in the case of using a high wattage type LED in Embodiment 1 of the present invention.

  Moreover, in Embodiment 1, the case where the some heat radiating fin 6 which has one type of shape was used was illustrated. However, the present invention is not limited to this, and a plurality of types of heat radiation fins having different shapes may be used for one lighting device. Further, only one heat dissipating fin 6 may be provided on the heat sink base 5.

Embodiment 2. FIG.
Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 8 is an external view of the illumination device according to Embodiment 2 of the present invention as seen from the rear side. As shown in this figure, the illuminating device 21 according to the present embodiment includes, for example, two illuminating units 22. Each lighting unit 22 is configured in the same manner as the lighting device 1 according to the first embodiment, and a plurality of radiating fins 6 are attached in parallel to one side of the heat sink base 5.

  Each lighting unit 22 is integrated in a state where the heat radiating fins 6 are arranged in a straight line, that is, in a state where the directions of the heat radiating fins 6 are aligned with each other, thereby constituting the lighting device 21. More specifically, the heat radiating fins 6 of these lighting units 22 form a plurality of convection passages 23 extending linearly across the lighting units 22. And the convection channel | path 23 comprises the flow path through which the convection of the air generated with the heat | fever of LED3 flows.

  According to this Embodiment comprised in this way, the convection of the air produced with the heat | fever of LED3 can be distribute | circulated along the convection channel | path 23, and the convection over the some illumination unit 22 is formed stably. be able to. Thereby, in addition to the effect similar to the said Embodiment 1, also in the large illuminating device 21, heat dissipation can be improved.

Embodiment 3 FIG.
Next, a third embodiment of the present invention will be described with reference to FIG. FIG. 9 is an external view of a lighting device according to Embodiment 3 of the present invention as seen from the rear side. As shown in this figure, the illuminating device 31 according to the present embodiment includes, for example, four illumination units 32. Each lighting unit 32 is configured in the same manner as the lighting device 1 ′ according to the first embodiment, and a plurality of radiating fins 6 are attached in parallel to the diagonal line of the heat sink base 5. In the four lighting units 32, the heat sink base 5 is arranged in a grid on the same plane, and two sets of the lighting units 32 face each other in the diagonal direction of the heat sink base 5.

  The lighting units 32 of each set are integrated in a state where the radiating fins 6 are arranged in a straight line in a direction parallel to the diagonal line, that is, in a state where the directions of the radiating fins 6 are aligned with each other. These radiating fins 6 form a plurality of convection passages 33 that extend linearly across the lighting units 32. And the convection channel | path 33 comprises the flow path through which the convection of the air generated with the heat | fever of LED3 flows.

  According to the present embodiment configured as described above, the convection passage 33 can be formed even in the lighting device 31 in which the four lighting units 32 are integrated, and the same effect as in the second embodiment can be obtained. Can be obtained.

Embodiment 4 FIG.
Next, a fourth embodiment of the present invention will be described with reference to FIGS. FIG. 10 is a perspective view of a lighting device according to Embodiment 4 of the present invention as viewed from the front side. FIG. 11 is an external view of the illumination device shown in FIG. 10 as viewed from the front side, and FIG. 12 is an external view of the illumination device as viewed from the rear side. As shown in these drawings, the illumination device 41 according to the present embodiment includes a heat sink base 42, a heat radiating fin 43, and the LED 3 'described above.

  The heat sink base 42 is formed in a polygonal column shape having three or more sides by, for example, a metal material, and an end face on one side in the axial direction constitutes a light source attachment portion 42A to which the LED 3 'is attached. The light source mounting part 42A and the LED 3 'constitute a light source part arranged on the front side of the lighting device 41, and the heat sink base 42 and the heat radiation fin 43 constitute a heat radiation part arranged on the rear surface side of the lighting device 41. Yes. The heat sink base 42 may be formed of a polygonal solid metal column, or may be formed of a polygonal hollow metal cylinder as shown in FIG. Further, a solid metal column may be lightened by inserting counterbore. However, the heat conductivity of the heat sink base 42 is best when a solid metal column without counterbore is used.

  On the side surface portion of the heat sink base 42, planar fin mounting portions 42B are provided at positions corresponding to the respective sides of the polygon. These fin attachment portions 42B are arranged at a plurality of portions having different positions or angles with respect to the LED 3 ', and a plurality of heat radiation fins 43 can be attached to each fin attachment portion 42B by means such as screwing, for example. It has become. In the present embodiment, the heat sink base 42 is formed in a hexagonal column shape, six fin mounting portions 42B are provided, and two radiating fins 43 are mounted on all the fin mounting portions 42B. . However, the present invention is not limited to this, and the heat sink base 42 may be formed in a polygonal column shape other than a hexagonal shape.

  The heat radiating fins 43 are made of, for example, a rectangular flat metal plate. One side which is the base end side of the heat radiating fin 6 is formed to be bent in an L shape, and this bent portion can be attached to the fin attaching portion 42B of the heat sink base 42. And as shown in FIG.11 and FIG.12, in the state which stood perpendicularly from the side part of the heat sink base 42, the base end side is attached to the fin attachment part 42B of the heat sink base 42 so that the radiation fin 43 can attach or detach. It protrudes. Further, when the heat dissipating fins 43 attached to the fin attaching portions 42B are viewed as a whole, they are arranged radially around the LED 3 '. Thereby, the radiation fin 43 is comprised so that the heat | fever which generate | occur | produces from a light source part may be thermally radiated efficiently to surrounding space.

  In the present embodiment configured as described above, substantially the same effects as those of the first embodiment can be obtained. That is, a plurality of types of lighting devices can be configured as will be described later, depending on which fin mounting portion 42B of the heat sink base 42 is mounted with the radiation fins 43. In addition, since the heat sink base 42 and the radiation fins 43 are formed as separate parts, the number of the radiation fins 43 mounted on one lighting device can be changed, or multiple types of radiation fins 43 having different shapes can be mounted. Can be easily done.

Embodiment 5 FIG.
Next, a fifth embodiment of the present invention will be described with reference to FIG. FIG. 13 is an external view of a lighting device according to Embodiment 5 of the present invention as viewed from the front side. As shown in this figure, the illumination device 51 according to the present embodiment is configured by, for example, two illumination units 52. Although each lighting unit 52 is configured in substantially the same manner as the lighting device 41 according to the fourth embodiment, the heat radiating fins 43 are attached to the five fin attaching portions 42B and the other one fin attaching portion 42B. In this state, the heat dissipating fins 43 are not present.

  Further, the heat sink bases 42 of the respective lighting units 52 are arranged so that the axes thereof are parallel to each other, and the fin attaching portions 42B to which the radiating fins 43 are not attached are opposed to each other. In this state, the lighting units 52 are integrated to form a large lighting device 51. As described above, when the plurality of illumination units 52 are integrated, the LEDs 3 'as heat sources are in a dense state. Therefore, if the radiation fins are arranged at the portions where the illumination units 52 face each other, the radiation fins are effectively used. It does not function, and the heat dissipation of the heat sink base 42 is likely to deteriorate. For this reason, in the present embodiment, the heat between the heat sink bases 42 is not provided by disposing the heat dissipating fins 43 in the fin mounting portions 42B that are the facing portions of the illumination units 52 but facing the fin mounting portions 42B. The structure increases conductivity.

  According to this Embodiment comprised in this way, when the some illumination unit 52 is integrated, the structure which removed one heat radiation fin 43 is easily realizable. Thus, by using the same components as in the fourth embodiment, the heat conductivity between the heat sink bases 42 can be increased, or the heat radiation fins 43 can be arranged only in the direction along the convection generated by the heat of the LED 3 '. it can. Therefore, also in the large illuminating device 51, in addition to the effect similar to the said Embodiment 4, the heat dissipation of the illuminating device 51 whole can be improved.

Embodiment 6 FIG.
Next, a sixth embodiment of the present invention will be described with reference to FIG. FIG. 14 is an external view of a lighting device according to Embodiment 6 of the present invention as seen from the front side. As shown in this figure, the illuminating device 61 according to the present embodiment is configured by arranging, for example, two illuminating units 62 in parallel as in the fifth embodiment. Further, in each lighting unit 62, the radiating fins 43 are attached to, for example, only the three fin mounting portions 42B far from the other lighting unit 62 out of the six fin mounting portions 42B, and close to the other lighting unit 62. The three fin mounting portions 42B located at the position where no heat radiating fins 43 are present.

  In the present embodiment configured as described above, the same effect as in the fifth embodiment can be obtained. In particular, as compared with the fifth embodiment, the distance between the heat sink bases 42 can be shortened or the fin mounting portions 42B facing each other can be brought into close contact with each other, thereby further improving the thermal conductivity between the heat sink bases 42. be able to.

Embodiment 7 FIG.
Next, a seventh embodiment of the present invention will be described with reference to FIG. FIG. 15 is an external view of a lighting device according to a seventh embodiment of the present invention as viewed from the front side. As shown in the figure, the illumination device 71 according to the present embodiment is configured by combining the illumination unit 52 according to the fifth embodiment and the illumination unit 62 according to the sixth embodiment. The lighting units 52 and 62 are arranged such that the heat sink bases 42 are arranged in parallel with each other and the fin attaching portions 42B to which the heat radiating fins 43 are not attached face each other. In the present embodiment configured as described above, the same effect as in the sixth embodiment can be obtained. For example, the fin mounting portions 42B facing each other can be brought into close contact with each other to improve the thermal conductivity.

  In the fifth to seventh embodiments, when the plurality of illumination units 52 and 62 are combined and integrated, the radiation fins 43 that do not function effectively are not attached. This configuration can also be applied to the second and third embodiments. Furthermore, although the individual configurations are illustrated in the first to seventh embodiments, the present invention is not limited to these individual configurations. That is, in the present invention, for example, a single lighting device may be realized by combining a plurality of configurations that can be combined among Embodiments 1 to 7. As a specific example, in Embodiments 2 to 7, a plurality of types of heat radiation fins 43 having different shapes or areas may be attached to one heat sink base 42, and the heat sink base 42 and the heat radiation fin 43 are different from each other. You may form with a metal material of a kind.

  In the first to seventh embodiments, in order to improve heat dissipation, a process of forming an anodic oxide film of aluminum on the surfaces of the radiation fins 6 and 43 (so-called alumite treatment) may be performed.

  In the first to seventh embodiments, the LEDs 3 and 3 ′ are exemplified as the light source. However, the present invention is not limited to the LED, but can be applied to various other light sources.

1, 1 ', 21, 31, 41, 51, 61, 71 Illumination device, 2 Light source mounting plate (light source part), 3, 3' LED (light source part, light source), 4 Substrate (light source part), 5, 42 Heat sink base, 5A, 5B Screw hole (fin attachment part), 6, 43 Radiation fin, 22, 32, 52, 62 Illumination unit, 23 Convection passage (air flow path), 42A Light source attachment part, 42B Fin attachment part

Claims (7)

A light source unit equipped with a light source for emitting light;
A heat sink base attached to the light source unit and dissipating heat generated from the light source unit ;
A plurality of fin mounting portions provided on the heat sink base and having different positions or angles with respect to the light source;
A heat dissipating fin that is attached to at least a part of the fin attaching portions among the plurality of fin attaching portions and radiates heat of the light source portion together with the heat sink base,
A lighting device having a configuration in which a plurality of types of lighting devices can be assembled using a single type of heat sink base by changing a fin mounting portion to which the heat dissipating fin is mounted among the plurality of fin mounting portions . A light source unit equipped with a light source for emitting light;
A heat sink base attached to the light source unit and dissipating heat generated from the light source unit ;
A plurality of fin mounting portions provided on the heat sink base and having different positions or angles with respect to the light source;
A heat dissipating fin that is attached to at least some of the fin attaching portions among the plurality of fin attaching portions, and performs heat dissipation of the light source portion together with the heat sink base,
Is composed of a plurality of lighting units each comprising
A lighting device having a configuration in which a plurality of types of lighting units can be assembled using a single type of heat sink base by changing a fin mounting portion to which the heat dissipating fin is mounted among the plurality of fin mounting portions . Wherein the plurality of lighting units, the lighting device according to claim 2 where the structure assembled as an air flow path extending linearly is formed across the two lighting units also reduced by the heat radiation fins. The heat sink base is formed in a square shape,
The fin mounting portion includes a first fin mounting portion capable of mounting the radiating fin parallel to one side of the heat sink base, and a second fin mounting portion capable of mounting the radiating fin parallel to a diagonal line of the heat sink base. The lighting device according to claim 1, wherein the lighting device includes a fin mounting portion. The heat sink base is formed in a polygonal column shape having three or more sides,
The light source is disposed on an end surface in the axial direction of the heat sink base,
The lighting device according to any one of claims 1 to 3, wherein the fin attachment portion is disposed on a side surface portion corresponding to each side of the heat sink base.   The lighting device according to claim 1, wherein the heat sink base is provided with a plurality of types of heat radiation fins having different projecting dimensions or areas from the heat sink base.   The lighting device according to any one of claims 1 to 6, wherein the heat sink base and the heat radiation fin are formed of different kinds of metal materials.

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