JP2016225064A - Radiator and luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance heat radiation properties of a heat radiation fin when a support base is in a posture of being located vertically upward.SOLUTION: A radiator includes: a support base 13 having a front surface 13a on which a substrate 11 having a light-emitting element 10 is provided, and a back surface 13b on the opposite side from the front surface; a heat pipe 14 having one end part 14a provided at the support base 13 along an in-plane direction of the support base 13 and the other end part 14b opposing to it along the longitudinal direction of the one end part; and a plurality of heat radiation fins 16 arrayed at intervals along the longitudinal direction o the other end part 14b and connected to the other end part 14b. The plurality of heat radiation fins 16 include: a first heat radiation fin 16a connected to the back surface 13b of the support base 13; and a second heat radiation fin 16b which is provided by a space 15 for radiating heat transmitted from the other end part 14b being communicated with the outside of the support base 13 in the longitudinal direction of the other end part 14b, between itself and the back surface 13b of the support base 13.SELECTED DRAWING: Figure 3

Description

  Embodiments described herein relate generally to a radiator and a lighting device.

  In a lighting device using a plurality of light emitting diodes (LEDs) as a light source, a configuration is known in which a radiator that dissipates heat generated by the LEDs is arranged on the back side (back side) of the emission surface that emits illumination light. ing. The radiator which this kind of illuminating device has has a support stand, a plurality of heat pipes, and a plurality of radiation fins.

  The support base supports a substrate on which a plurality of LEDs are arranged on the front surface. The heat pipe has one end on the heat absorption side provided along the support base, and is bent so that the other end on the heat dissipation side is separated from the support base and faces the one end. The plurality of heat radiating fins are arranged at intervals along the other end portions of the plurality of heat pipes, and are connected to the other end portion of each heat pipe and the back surface of the support base. The heat radiator radiates heat from the other end of the heat pipe to the outside air through heat radiation fins.

JP 2009-4276 A JP 2014-159915 A

  By the way, the illuminating device having the above-described radiator is used as spot illumination in stage equipment such as a theater or a lecture hall. The lighting device used in the stage equipment may be used in a posture in which the optical axis of the illumination light is directed vertically upward so as to irradiate the illumination light on the ceiling side in the production using the illumination light. In such a posture, a heat source as a light source is positioned vertically above the heat radiating fins of the radiator, so-called a top heat state, and the air flow that naturally convects is blocked by the support base. For this reason, it exists in the tendency for the heat dissipation which discharge | releases the heat | fever transmitted to the radiation fin from the other end part and support stand of the thermal radiation side of a heat pipe to an external air falls.

  Therefore, in the illuminating device, the output of the LED is set so that the heat dissipation of the heat dissipating fins is properly ensured even when the support base of the heat dissipator is positioned vertically upward. For this reason, in order to implement | achieve further higher output of LED, when using with the attitude | position mentioned above, improving the heat dissipation of a radiation fin is calculated | required.

  Then, an object of this invention is to provide the heat radiator and the illuminating device which can improve the heat dissipation of the radiation fin in the attitude | position which a support stand is located in the vertically upward direction.

  A radiator according to an embodiment includes a support base having a first surface provided with a substrate having a light emitting element, a second surface opposite to the first surface, and an in-plane direction of the support base And a heat pipe having one end provided on the support base and the other end opposite to the longitudinal direction of the one end, and arranged at intervals along the longitudinal direction of the other end And a plurality of heat dissipating fins connected to the other end. The plurality of radiating fins include a first radiating fin connected to the second surface of the support base, and a gap for releasing heat transmitted from the other end portion, to the second surface of the support base. And a second radiating fin provided in communication with the outside of the support base in the longitudinal direction of the other end.

  ADVANTAGE OF THE INVENTION According to this invention, the heat dissipation of a radiation fin when a support stand is the attitude | position located vertically upward can be improved.

FIG. 1 is a perspective view showing a lighting device according to the first embodiment. FIG. 2 is an exploded perspective view showing the lighting apparatus according to the first embodiment. FIG. 3 is a perspective view showing a heat radiator included in the lighting apparatus according to the first embodiment. FIG. 4 is a front view showing the radiator in the first embodiment from the Y-axis direction in FIG. 3. FIG. 5 is a plan view showing the heat radiator in the first embodiment from the Z-axis direction in FIG. 3. FIG. 6 is a side view showing the radiator in the first embodiment from the X-axis direction in FIG. 3. FIG. 7 is a plan view showing a heat radiator in the second embodiment. FIG. 8 is a side view showing a heat radiator in the second embodiment. FIG. 9 is a side view showing a heat radiator in the third embodiment.

  The heat radiator 5 according to the embodiment described below includes a support base 13, a heat pipe 14, and a plurality of heat radiation fins 16. The support base 13 has a front surface 13a and a back surface 13b opposite to the front surface 13a. A substrate 11 having a light emitting element 10 is provided on the front surface 13a. The heat pipe 14 has one end portion 14a and the other end portion 14b. The one end portion 14 a is provided on the support base 13 along the in-plane direction of the support base 13. The other end part 14b is opposed along the longitudinal direction of the one end part 14a. The plurality of radiating fins 16 are arranged at intervals along the longitudinal direction of the other end portion 14b and are connected to the other end portion 14b. The plurality of heat radiation fins 16 include a first heat radiation fin 16a and a second heat radiation fin 16b. The first heat radiating fins 16 a are connected to the back surface 13 b of the support base 13. Between the second radiation fin 16b and the back surface 13b of the support base 13, a space 15 for releasing heat transmitted from the other end part 14b communicates with the outside of the support base 13 in the longitudinal direction of the other end part 14b. Is provided.

  Moreover, the 2nd radiation fin 16b in the heat radiator 5 which concerns on embodiment described below is isolate | separated from the support stand 13. FIG.

  Moreover, the several radiation fin 16 in the heat radiator 5 which concerns on embodiment described below contains the several 2nd radiation fin 16b. The plurality of second radiating fins 16b gradually increase in length L with respect to the direction intersecting the back surface 13b of the support base 13 from the center side of the support base 13 toward the outside along the other end portion 14b of the heat pipe 14. It is formed to be smaller.

  Moreover, the heat pipe 14 in the radiator 25 according to the embodiment described below has an intermediate portion 14c. The intermediate portion 14c intersects the one end portion 14a and the other end portion 14b between the one end portion 14a and the other end portion 14b. The second heat radiation fin 26b is bent so as to be connected to the other end portion 14b and the intermediate portion 14c.

  Moreover, as for the several radiation fin 16 (16a, 16b) in the heat radiator 5 which concerns on embodiment described below, the edge part on the opposite side to the back surface 13b side of the support stand 13 is mutually connected.

  Moreover, the illuminating device 1 which concerns on embodiment described below comprises the heat radiator 5 and the board | substrate 11 which has the light emitting element 10. FIG.

(First embodiment)
Hereinafter, an illumination device according to an embodiment will be described with reference to the drawings. The lighting device according to the present embodiment is used as spot lighting in, for example, stage equipment or a photography studio. FIG. 1 is a perspective view showing the lighting apparatus according to the first embodiment. FIG. 2 is an exploded perspective view showing the lighting apparatus according to the first embodiment.

  As illustrated in FIGS. 1 and 2, the illumination device 1 according to the first embodiment includes a light source 3, an optical system 4 that emits light emitted by the light emitted from the light source 3, and a light source 3. And a radiator 5 for releasing heat. The lighting device 1 includes a control circuit 6 that controls the light source 3, a first housing 7 that houses the light source 3, the optical system 4, and the radiator 5, and a second housing 8 that houses the control circuit 6. And comprising.

  The light source 3 includes a substrate 11 on which a plurality of light emitting elements 10 to be described later are arranged. As the light emitting element 10, a light emitting diode (LED), a semiconductor laser (LD), or an organic electroluminescence element is used. For example, the plurality of light emitting elements 10 in the present embodiment are arranged in a grid pattern on the substrate 11 and configured as a planar light source. The optical system 4 includes a reflector (not shown) for controlling the optical axis of light emitted from the light emitting element group 10 of the light source 3 and a lens 4a that emits light incident from the reflector as illumination light.

  As shown in FIG. 1, an opening 7a is provided on the front surface side of the first housing 7, and a lens 4a is disposed in the opening 7a. A plurality of banders 7b for adjusting the illumination state of the illumination light are provided on the outer periphery of the opening 7a so as to be opened and closed. Further, the first casing 7 is provided with a mesh-like heat radiation port 7 c for releasing heat from the heat radiator 5 on each of a side surface, an upper surface, a bottom surface, and a rear surface facing the heat radiator 5. On the side surface of the first housing 7, an arm member 7d for suspending the entire lighting device 1 is rotatably attached via a rotation shaft 7e. A handle member 7f for adjusting the irradiation direction of the illumination light by adjusting the posture of the illumination device 1 supported by the arm member 7d is attached to the back surface of the first housing 7.

  A power cord 8a having a power plug 8b connected to an external power source (not shown) is provided outside the second casing 8, and one end of the power cord 8a is electrically connected to the control circuit 6. ing. The first casing 7 and the second casing 8 are separated from each other to prevent heat from being transmitted between the light source 3 and the control circuit 6, and are connected by a plurality of connecting members 9. Yes. Further, a wiring (not shown) is routed through the inside of the connecting member 9, and the control circuit 6 and the light source 3 are electrically connected through the wiring.

(Configuration of radiator)
FIG. 3 is a perspective view showing the radiator 5 included in the lighting apparatus according to the first embodiment. FIG. 4 is a front view showing the radiator 5 in the first embodiment from the Y-axis direction in FIG. 3. FIG. 5 is a plan view showing the radiator 5 in the first embodiment from the Z-axis direction in FIG. 3. FIG. 6 is a side view showing the radiator 5 in the first embodiment from the X-axis direction in FIG. 3.

  As shown in FIG. 3, the radiator 5 includes a support base 13 that supports the substrate 11, a plurality of heat pipes 14 that release heat transmitted from the support base 13, and a plurality of heat radiation fins 16 provided on the heat pipe 14. And having.

  The support base 13 is formed in a rectangular flat plate shape using a metal material having thermal conductivity such as aluminum or copper. As shown in FIGS. 4 and 5, the support base 13 has a front surface 13a as a first surface and a back surface 13b as a second surface opposite to the front surface 13a. A substrate 11 having a light emitting element 10 is provided in contact with the front surface 13a. A plurality of heat pipes 14 are provided in contact with the back surface 13b side.

  As shown in FIG. 4, a placement portion 18 on which the substrate 11 is placed is provided in the center of the front surface 13 a of the support base 13. The mounting portion 18 is made of a material having thermal conductivity such as aluminum and is fitted in the center of the support base 13. A plurality of heat pipes 14 are disposed on the back surface 13b side of the support base 13 so as to be in contact with the mounting portion 18, and the heat conduction by which the heat generated by the light emitting element 10 is transmitted to the heat pipe 14 by the mounting portion 18. Sexuality is enhanced.

  As described above, the support base 13 supports the substrate 11 so that heat is transferred from the substrate 11 having the light emitting element 10. The structure in which the substrate 11 is provided on the support base 13 is a structure in which the substrate 11 is supported by the support base 13 in a contact state in which heat is conducted between the substrate 11 and the front surface 13a of the support base 13. Pointing. This contact state indicates a direct contact state and an indirect contact state. The state of indirect contact includes, for example, a state of being fixed via a surface contact member such as silicon grease having good thermal conductivity. In the present embodiment, it is preferable that the substrate 11 and the front surface 13a of the support base 13 are provided in close contact with each other.

  The heat pipe 14 is configured by sealing a volatile working fluid inside a pipe formed of a metal material such as copper having thermal conductivity. As shown in FIGS. 3 and 5, the heat pipe 14 is entirely formed in a U shape by being bent along the longitudinal direction on the same plane, and has one end 14 a on the heat absorption side and one on the heat dissipation side. And the other end 14b.

  One end portion 14 a of the heat pipe 14 is provided in contact with the support base 13 along the in-plane direction of the support base 13. The other end portion 14b of the heat pipe 14 is bent so as to face the one end portion 14a along the longitudinal direction on the same plane. The heat pipe 14 includes an intermediate portion 14c that is bent so as to be orthogonal to the one end portion 14a and the other end portion 14b between the one end portion 14a and the other end portion 14b.

  As shown in FIGS. 3 and 4, one end 14 a of the plurality of heat pipes 14 has a predetermined interval with respect to the short side direction that is the Z-axis direction in FIG. 3 on the back surface 13 b side of the support base 13. Open and extended along the long side direction which is the X-axis direction. The one end portions 14a of the plurality of heat pipes 14 are alternately staggered along the short sides on both sides in the long side direction (X-axis direction) of the support base 13, and in the long side direction of the support base 13 It extends so as to straddle both ends of the mounting portion 18.

  Further, as shown in FIGS. 3 and 6, a recess 13 c having a semicircular cross section is formed on the back surface 13 b of the support base 13 along the long side direction (X-axis direction) of the support base 13. One end portion 14a of the heat pipe 14 is fitted and fixed in the recess 13c. Further, the other end portions 14b of the heat pipes 14 arranged on both sides in the long side direction of the support base 13 are extended so as to face each other along the longitudinal direction of the other end portion 14b, although not shown. .

  In addition, as shown in FIG. 6, the plurality of heat pipes 14 are arranged such that the intermediate portion 14 c is arranged radially with respect to the center of the short side of the support base 13, so that the other end portion 14 b is the outer periphery of the radiating fin 16. It is extended to the side. With this arrangement, the other end portion 14b of the heat pipe 14 is connected to a region having a relatively low temperature in the heat radiating fin 16, so that the heat dissipation of the other end portion 14b is enhanced.

  In the present embodiment, the one end portion 14a of the heat pipe 14 is fixed in contact with the back surface 13b of the support base 13. However, the present invention is not limited to this configuration. It may be embedded inside. Moreover, the shape of the heat pipe 14 is not limited to the above-mentioned U shape, and may be further bent at a midway position in the longitudinal direction of the intermediate portion 13c as necessary.

  The radiating fins 16 are formed of a metal plate having thermal conductivity such as aluminum or copper. As shown in FIGS. 4 and 5, the radiating fins 16 are arranged in parallel to each other at intervals along the longitudinal direction of the other end portion 14b of the heat pipe 14, and are connected to the other end portion 14b. Yes. Further, as shown in FIG. 6, the radiating fin 16 is provided with a through hole 19 through which the other end 14 b of the heat pipe 14 is inserted, and the other end 14 b is fixed to the through hole 19.

  Moreover, the radiation fin 16 includes a plurality of first radiation fins 16a and a plurality of second radiation fins 16b. As shown in FIG. 5, the first radiating fin 16 a is disposed at the center of the support base 13 in the long side direction (X-axis direction). One end of the first radiating fin 16a is bent in parallel with the back surface 13b of the support base 13, and is joined to the back surface 13b of the support base 13 by a solder material (not shown) so as to be connected to the support base 13. Yes. Note that one end of the first radiating fin 16 a may be connected to the groove of the support base 13 by caulking. Moreover, the 1st radiation fin 16a may be integrally formed in the back surface 13b of the support stand 13 by the cutting process.

  Further, as shown in FIG. 6, a concave portion 16 c having a semicircular cross section is formed on one end side of the first radiating fin 16 a at a position corresponding to the concave portion 13 c of the support base 13. It is connected to one end portion 14a. At one end of the first radiating fin 16 a connected to the support base 13, both sides in the short side direction (Z-axis direction) of the support base 13 are extended to the front surface 13 a of the support base 13. It is connected to the side.

  The second radiating fins 16b are separated from the support base 13, and a space 15 as a space for releasing heat transmitted from the other end part 14b is between the back surface 13b of the support base 13 and the other end part 14b. It is provided in communication with the outside of the support base 13 in the longitudinal direction. Further, as shown in FIG. 5, the plurality of second heat radiation fins 16 b have a length L with respect to the in-plane direction of the support base 13, that is, the direction orthogonal to the back surface 13 b, along the other end portion 14 b of the heat pipe 14. Thus, the support base 13 is formed so as to gradually decrease from the center side of the long side toward the outer peripheral side. Therefore, the space 15 between each second heat radiation fin 16 b and the back surface 13 b of the support base 13 gradually increases toward both sides of the long side of the support base 13.

  The plurality of first and second radiating fins 16a and 16b are connected to each other by bending the end of the support base 13 opposite to the back surface 13b. Thereby, since the 2nd radiation fin 16b isolate | separated from the support stand 13 is connected with the 1st radiation fin 16a fixed to the back surface 13b of the support stand 13, rigidity is improved.

  In the present embodiment, the plurality of second radiating fins 16b are formed by changing only the length L, but may be formed by changing the planar shape as necessary. For example, the area of the plurality of second radiating fins 16b may be formed so as to gradually decrease along the other end portion 14b of the heat pipe 14 from the center side of the support base 13 toward the outside. Also in this configuration, the space 15 between the back surface 13b of the support base 13 and the second heat radiation fin 16b communicates with the outside of the support base 13 in the longitudinal direction of the other end portion 14b of the heat pipe 14. The heat dissipation of the second heat radiation fin 16b is improved.

(Heat dissipation action in radiator)
In the lighting device 1 according to the first embodiment configured as described above, an operation in which heat generated by the light emitting element 10 is released to the outside air by the radiator 5 will be described. The heat generated by the light emitting element 10 is transmitted to the support base 13 of the radiator 5 through the substrate 11. The heat transmitted to the support table 13 is absorbed by the heat pipe 14 having one end portion 14 a extended along the in-plane direction of the support table 13.

  In the heat pipe 14 in which heat is transmitted to the end portion 14a on the heat absorption side, the working fluid evaporates at the one end portion 14a, and the vapor of the working fluid moves to the other end portion 14b on the heat dissipation side through the internal cavity. The vapor of the working fluid that has moved to the other end portion 14b condenses at the other end portion 14b and returns to the one end portion 14a as the working fluid, whereby heat is moved and released along the longitudinal direction of the heat pipe 14. The Thus, the heat pipe 14 dissipates the heat absorbed from the one end portion 14a side from the other end portion 14b side through the hydraulic fluid.

  Further, the heat transmitted to the other end portion 14b of the heat pipe 14 is transmitted to the plurality of first and second radiation fins 16a and 16b, respectively, and natural convection of air generated between the adjacent radiation fins 16 (16a and 16b). Heat is released to the outside air. Moreover, the 1st radiation fin 16a discharge | releases the heat | fever transmitted from the back surface 13b of the support stand 13 to external air by the natural convection of air.

  And when the illuminating device 1 is used with the optical axis of the illumination light which the light emitting element 10 radiate | emits facing vertically upwards, it will be the attitude | position in which the support stand 13 of the heat radiator 5 is located vertically upwards. When it becomes this attitude | position, in the heat radiator 5, the space 15 located between the 2nd thermal radiation fin 16b and the back surface 13b of the support stand 13 is located vertically upwards. Also in this posture, as in the other postures, the heat transmitted to the other end portion 14b of the heat pipe 14 is transmitted to the plurality of first and second radiating fins 16a and 16b, respectively. The heat of each of the first and second radiating fins 16a and 16b is the air flowing between the adjacent radiating fins 16 (16a and 16b) along the direction intersecting the longitudinal direction of the other end 14b of the heat pipe 14. By natural convection, it is discharged to the outside air around the radiator 5.

  In addition, natural convection of air flowing vertically upward is generated around the second radiation fins 16b by transferring heat from the other end 14b of the heat pipe 14. At this time, the space 15 between the second radiating fin 16b and the back surface 13b of the support base 13 is positioned vertically upward. For this reason, the air that has risen to the back surface 13b of the support table 13 by natural convection passes through the space 15 and moves toward the outside of the support table 13 along the back surface 14b in the longitudinal direction of the other end portion 14b of the heat pipe 14. And flows smoothly. As a result, the flow of air that has risen up to the back surface 13b of the support base 13 is smoothly prevented from being released to the outside air without being blocked by the second radiating fins 16b. Therefore, the other end portion 14b of the heat pipe 14 is appropriately radiated by the second heat radiation fin 16b.

  In addition, the plurality of second radiating fins 16b have a length L shown in FIG. 5 that gradually decreases toward the outside of the support base 13 along the longitudinal direction of the other end 14b of the heat pipe 14. Since it is formed, a region facing the space 15 is ensured at each end of the second radiating fins 16b on the back surface 13b side. Thereby, the heat dissipation of the 2nd radiation fin 16b arrange | positioned at the center side of the support stand 13 is further improved. In addition, the heat transmitted from the substrate 11 to the back surface 13b of the support base 13 and the heat transmitted from the support base 13 to the first radiating fins 16a also flows naturally through the space 15 toward the outside of the support base 13. By convection, the air is smoothly discharged to the outside air around the radiator 5.

  As described above, in the posture in which the support base 13 is positioned vertically upward, for example, when the optical axis of the illumination light is directed vertically upward, the heat dissipation of the second radiation fins 16b is enhanced and the support base is increased. The heat radiation performance of the first heat radiation fins 16a disposed at the center of the heat radiation fin 13 is also improved. For this reason, even if it is a case where the illuminating device 1 is used with the attitude | position mentioned above, a heat | fever is discharge | released appropriately from the other end part 14b of the heat pipe 14, and the light emitting element 10 is cooled effectively.

  In the present embodiment, the plurality of second radiating fins 16b are formed such that the length L shown in FIG. 5 gradually decreases toward both sides of the long side of the support base 13, but the length L May be formed to be equal. Even when the lengths L of the plurality of second radiating fins 16b are formed to be equal, the space 15 is formed between the second radiating fins 16b and the back surface 13b of the support base 13, so that the first The heat dissipation of the second heat radiation fin 16b is improved.

  According to the first embodiment, the space 15 that releases heat transmitted from the other end portion 14 b of the heat pipe 14 is between the back surface 13 b of the support stand 13 and the support stand 13 in the longitudinal direction of the other end portion 14 b. A plurality of heat radiation fins 16 including second heat radiation fins 16b provided in communication with the outside are provided. Thereby, even when the support base 13 is in a posture positioned vertically upward, the heat of the second radiating fins 16b can be released to the outside air through the space 15, and thus the second radiating fins 16b. The heat dissipation can be improved. Therefore, since the heat radiation property of the other end portion 14b of the heat pipe 14 is enhanced by the second heat radiation fin 16b, it is possible to realize further higher output of the light emitting element 10. As a result, it is possible to increase the illuminance of the irradiation light of the lighting device 1.

  In addition, the plurality of radiating fins 16 (16a, 16b) included in the radiator 5 are connected to each other at the ends opposite to the back surface 13b side of the support base 13, so that the second radiating fins 16b are Since it is connected to the first radiating fin 16a connected to the support base 13, the rigidity of the second radiating fin 16b can be increased.

  Hereinafter, illumination devices according to other embodiments will be described with reference to the drawings. In other embodiments, the same components as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and the description thereof is omitted.

(Second Embodiment)
FIG. 7 is a plan view showing a heat radiator in the second embodiment. FIG. 8 is a side view showing a heat radiator in the second embodiment. The radiator in the second embodiment is different from the first embodiment in the configuration of the second radiation fin.

  As shown in FIGS. 7 and 8, the radiator 25 included in the lighting device of the second embodiment includes a plurality of heat pipes 14 and a plurality of heat radiation fins 26. The plurality of radiating fins 26 include a plurality of first radiating fins 26a and a plurality of second radiating fins 26b. The first radiating fins 26a are disposed across the back surface 13b of the support base 13 and the other end portion 14b of the heat pipe 14 in the same manner as the first radiating fins 16a in the first embodiment.

  Then, as shown in FIG. 7, the second radiating fin 26b is bent at an intermediate position in the direction orthogonal to the back surface 13b of the support base 13, and is connected to the other end portion 14b and the intermediate portion 14c of the heat pipe 14. Has been. Thus, a space 15 is provided between the second heat radiation fin 26 b located on the center side of the support base 13 and the back surface 13 b of the support base 13.

  Also in the heat radiator 25 configured as described above, the heat transmitted from the other end portion 14b of the heat pipe 14 to the second heat radiating fin 26b is smoothly released to the outside air around the heat radiator 25 through the space 15. The Further, since the second radiating fin 26b connected to the other end portion 14b of the heat pipe 14 is bent and connected to the intermediate portion 14c, the gap between the adjacent second radiating fins 26b becomes a radiator. 25 communicates with ambient air. For this reason, since the natural convection of the air produced between the 2nd radiation fins 26b flows smoothly toward the outside air, the heat transmitted to the 2nd radiation fins 26b is smoothly discharged to the outside air. Further, the heat transmitted to the first radiating fin 26 a is also released to the outside air around the radiator 25 through the space 15.

  Also in the second embodiment, similarly to the first embodiment, the heat of the second radiating fins 26b is released to the outside air through the space 15 even when the support base 13 is in a posture in which it is positioned vertically upward. Therefore, it is possible to improve the heat radiation performance of the second heat radiation fin 26b. Therefore, since the heat radiation property of the other end portion 14b of the heat pipe 14 is enhanced by the second heat radiation fin 26b, it is possible to realize further higher output of the light emitting element 10.

  In addition, in the second embodiment, the second heat radiation fin 26b is connected to the other end portion 14b and the intermediate portion 14c of the heat pipe 14, respectively. The number of connected parts increases in two places. For this reason, the heat dissipation effect of the heat pipe 14 using the second radiation fins 26b can be enhanced.

  Further, the second radiating fin 26b is bent and connected to the other end portion 14b and the intermediate portion 14c of the heat pipe 14, whereby the rigidity of the second radiating fin 26b can be increased. Durability against external shock and vibration is improved.

  In the first embodiment described above, the second radiating fins 16b are separated from the support base 13. However, the present invention is not limited to this configuration. If the space 15 is ensured between the second heat radiation fin 16b and the back surface 13b of the support base 13, a part of the second heat radiation fin 16b is supported by the support base in the same manner as the first heat radiation fin 16a. 13 back surfaces 13b. An example of a configuration in which a part of the second radiating fin is connected to the support base 13 will be described.

(Third embodiment)
FIG. 9 is a side view showing a heat radiator in the third embodiment. The radiator according to the third embodiment is different from the first embodiment in that a part of the second radiation fin is connected to the support base 13.

  As shown in FIG. 9, the heat radiator 35 in the third embodiment includes a plurality of heat pipes 14 and a plurality of heat radiation fins 36. The plurality of radiating fins 36 include a plurality of first radiating fins 36a and a plurality of second radiating fins 36b. The first heat radiating fins 36 a are disposed across the back surface 13 b of the support base 13 and the other end portion 14 b of the heat pipe 14, similarly to the first heat radiating fins 16 a in the first embodiment.

  And the 2nd radiation fin 36b is formed in the frame shape by providing the rectangular-shaped opening 37 in the half area | region located in the back surface 13b side of the support stand 13. FIG. The opening 37 defines a space 15 that communicates with the outside of the support base 13 in the longitudinal direction of the other end portion 14b.

  In addition, when it has several 2nd radiation fins 36b, it is preferable that the opening 37 of each 2nd radiation fin 36b is formed in the same position, and space is effectively comprised by several opening 37 group. be able to. In the third embodiment, one opening 37 is provided in the second radiation fin 36b. However, the present invention is not limited to this configuration. For example, although not shown, a plurality of openings may be formed in the second radiation fin 36b so that a plurality of openings are provided between the second radiation fin 36b and the back surface 13b of the support base 13.

  Also in the heat radiator 35 configured as described above, the heat transferred from the other end portion 14b of the heat pipe 14 to the second heat radiating fin 36b passes through the space 15 formed by the openings 37 of the second heat radiating fin 36b. The air is smoothly discharged to the outside air around the radiator 35. Further, the heat transmitted to the first heat radiation fin 36 a is released through the space 15 to the outside air around the heat radiator 35.

  Also in the third embodiment, similarly to the first and second embodiments, the heat of the second radiation fins 36b is transmitted by the openings 37 even when the support base 13 is in the posture of being vertically upward. Since it becomes possible to discharge | release to the external air around the heat radiator 35 through the comprised space 15, the heat dissipation of the 2nd radiation fin 36b can be improved. Therefore, since the heat radiation performance of the other end portion 14b of the heat pipe 14 is enhanced by the second heat radiation fin 36b, it is possible to realize further higher output of the light emitting element 10.

  In addition, in 3rd Embodiment, since the 2nd radiation fin 36b is connected with the back surface 13b of the support stand 13, and the other end part 14b of the heat pipe 14, the rigidity of the 2nd radiation fin 36b is improved. be able to.

  In addition, the position of the opening 37 of the second radiating fin 36 b is preferably a position adjacent to the back surface 13 b of the support base 13 in order to ensure smooth air fluidity through the opening 37. However, the edge portion of the opening 37 may be arranged away from the back surface 13 b of the support base 13 according to the manufacturing needs of the radiator 35.

  In the present embodiment, the support base 13 is provided with a substrate 11 on which a plurality of light emitting elements 10 are arranged so as to emit illumination light in a direction orthogonal to the front surface 13a and the back surface 13b of the support base 13. However, it is not limited to such a configuration. Regardless of the direction of the optical axis of the illumination light emitted from the light emitting element 10 arranged on the front surface 13a side of the support base 13, the heat dissipation performance of the radiation fins 16 in the posture in which the support base 13 is positioned vertically upward is enhanced.

  Further, in the heat pipe 14, the configuration in which the other end portion 14 b is bent so as to face the longitudinal direction of the one end portion 14 a includes a case where the one end portion 14 a is disposed inside the support base 13. That is, in the configuration in which the one end portion 14a and the other end portion 14b of the heat pipe 14 face each other, the one end portion 14a located inside the support base 13 and the other end portion 14b located outside the support base 13 The structure which opposes on both sides of the support stand 13 is also included.

  Although the embodiments of the present invention have been described, the embodiments are presented as examples and are not intended to limit the scope of the present invention. The embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. The embodiments and modifications thereof are included in the scope of the present invention and the gist thereof, and are also included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 Illuminating device 5 Radiator 10 Light emitting element 11 Board | substrate 13 Support stand 13a Front surface 13b Back surface 14 Heat pipe 14a One end part 14b Other end part 14c Intermediate part 15 Space 16 Radiation fin 16a 1st radiation fin 16b 2nd radiation fin

Claims (6)

A support base having a first surface provided with a substrate having a light emitting element, and a second surface opposite to the first surface;
A heat pipe having one end provided on the support base along the in-plane direction of the support base and the other end facing the longitudinal direction of the one end;
A plurality of radiating fins arranged at intervals along the longitudinal direction of the other end and connected to the other end;
The plurality of radiating fins include a first radiating fin connected to the second surface of the support base, and a gap for releasing heat transmitted from the other end portion, to the second surface of the support base. And a second heat dissipating fin provided in communication with the outside of the support base in the longitudinal direction of the other end.   The heat radiator according to claim 1, wherein the second heat radiation fin is separated from the support base.   The plurality of radiating fins are gradually reduced in length in a direction intersecting the second surface of the support base from the center side of the support base toward the outside along the other end portion of the heat pipe. The heat radiator according to claim 2, comprising a plurality of the second heat radiation fins formed to be. The heat pipe has an intermediate portion that intersects the one end and the other end between the one end and the other end,
The radiator according to claim 3, wherein the second radiating fin is bent so as to be connected to the other end portion and the intermediate portion.   5. The heat radiator according to claim 1, wherein the plurality of heat radiating fins are connected to each other at opposite ends of the support base on the second surface side. A radiator according to any one of claims 1 to 5;
A substrate having a light emitting element;
A lighting device comprising:

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