JP2012204508A - Heat sink for led lighting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat sink for LED lighting which is manufactured from an aluminum extrusion material by using a relatively simple processing method, is attached to a location with spatial limitations, and secures a sufficient heat radiation amount.SOLUTION: A heat sink A is formed by an aluminum extrusion material and includes: a substrate part 2 where an LED light source 1 is disposed on the front surface side and fixed thereto; and multiple protruding fin parts 3 arranged on the rear surface side of the substrate part 2 so as to be parallel with each other and spaced away from each other. The substrate part 2 has a L shape folded in a direction perpendicular to the longitudinal direction of the fin parts 3.

Description

  The present invention relates to a heat sink for LED lighting, in which LED lighting using a light emitting diode (LED) element as a light source radiates heat generated during light emission to the surrounding space.

  Lighting that uses a light emitting diode (LED) element as a light source is gradually penetrating the market due to its low power consumption and long life. Among these, in-vehicle LED lighting, such as automobile headlights, has attracted particular attention in recent years. Application of the in-vehicle LED lighting has begun to replace LED lighting in other fields such as buildings. ing.

  However, the LED element which is a light emitting source of this LED illumination is very weak to heat, and there is a problem that when the temperature exceeds the allowable temperature, the light emission efficiency is lowered, and further, the life is affected. In order to solve this problem, since it is necessary to dissipate heat at the time of light emission of the LED element to the surrounding space, the LED lighting is provided with a large heat sink.

  Many of these LED lighting heat sinks are made of aluminum or aluminum alloy made of aluminum or aluminum alloy. Patent Documents 1 to 4 disclose heat sinks having typical configurations among these heat sinks. ing. These heat sinks are configured to have a substrate portion in which the LED light source is arranged and fixed on the front side, and a plurality of parallelly arranged fin portions that protrude at intervals on the back side of the substrate portion. However, in all of these, the substrate portion is a flat plate, and if there is a space limitation, it is impossible to mount the substrate portion, and the applicable range is limited.

  On the other hand, LED die heat sinks made of aluminum die-casting have a problem that the manufacturing cost becomes high. To solve the problem, it is studied to produce LED heat sinks from an aluminum extruded material. However, the heat sink for LED lighting manufactured from this aluminum extruded material also has a substrate part 2 on which the LED light source 1 is arranged and fixed on the front side and a back side of the substrate part 2 as shown in FIG. Thus, the board portion 2 is necessarily formed in a flat plate shape and cannot be attached when there is a space limitation. Therefore, like the heat sinks described in Patent Documents 1 to 4, there is a problem that the applicable range is limited.

JP 2007-172932 A JP 2007-193960 A JP 2009-277535 A JP 2010-278350 A

  The present invention can be manufactured from an extruded aluminum material by a relatively simple processing method, can be mounted even in a space-constrained place, and can secure a sufficient amount of heat radiation. It is an object to provide a heat sink.

  The invention according to claim 1 is a heat sink for LED lighting formed from an aluminum extruded material, and the LED light source protrudes at a distance from the back surface side of the substrate portion, which is disposed and fixed on the front surface side. A heat sink for LED lighting, comprising a plurality of fin portions arranged in parallel, wherein the substrate portion is L-shaped bent in a direction perpendicular to the longitudinal direction of the fin portions.

  According to a second aspect of the present invention, the fin portion protrudes outside the substrate portion bent in an L shape, and the bent portion of the fin portion has a linear shape that reaches the outer surface of the substrate portion during processing. The heat sink for LED lighting according to claim 1, wherein a notch is formed and the fin portion is divided.

  According to a third aspect of the present invention, the fin portion protrudes to the inside of the substrate portion bent in an L shape, and an angle reaching the inner surface of the substrate portion during processing is 90 ° in the bent portion of the fin portion. The heat sink for LED lighting according to claim 1, wherein a V-shaped notch of more than 1 degree is formed and the fin portion is divided.

  According to the heat sink for LED lighting according to claim 1 of the present invention, it can be manufactured using a relatively simple processing method such as cutting and bending from an aluminum extruded material, and without increasing the number of components to be constructed, In addition, it can be attached to narrow places with space restrictions, places with complicated shapes, etc., and a sufficient amount of heat radiation from the LED illumination can be ensured even at places with such space restrictions.

  According to the heat sink for LED illumination according to claim 2 of the present invention, it is possible to attach to a corner corner portion of a narrow portion where space is limited, and it is bent because there is a fin portion when the substrate portion is bent. In addition, since it is not necessary to shorten the projecting dimension of the fin portion, it is possible to further ensure a sufficient amount of heat radiation from the LED lighting.

  According to the heat sink for LED illumination according to claim 3 of the present invention, it can be attached even in a narrow place where space is limited, and a sufficient heat radiation area can be secured by the surface area of the substrate part and the fin part. Further, it is possible to secure a sufficient amount of heat radiation from the LED illumination. It can also be attached to the corner corners of intricate places with space constraints. Furthermore, since there is no influence on the bending due to the presence of the fin portion when the substrate portion is bent, it is not necessary to shorten the projecting dimension of the fin portion. Can be secured.

It is a perspective view which shows the heat sink for LED lighting of one Embodiment of this invention. It is a perspective view which shows the heat sink for LED illumination of different embodiment of this invention. It is a perspective view which shows the heat sink for LED lighting of further another embodiment of this invention. It is a perspective view which shows the heat sink for LED lighting of further another embodiment of this invention. It is a cross-sectional view which shows the use condition which incorporated the heat sink for LED lighting of embodiment shown in FIG. 3 in LED lighting as a part of housing. It is the BB sectional drawing of FIG. 5 which shows the use condition which incorporated the heat sink for LED lighting of the embodiment into LED lighting as a part of housing. It is a cross-sectional view which shows the use condition which incorporated the heat sink for LED lighting of embodiment shown in FIG. 4 in LED lighting as a part of housing. It is the BB sectional drawing of FIG. 7 which shows the use condition which incorporated the heat sink for LED lighting of the embodiment into LED lighting as a part of housing. It is a perspective view which shows the conventional heat sink for LED lighting.

  Hereinafter, the present invention will be described in more detail based on embodiments shown in the accompanying drawings.

  The heat sink A for LED lighting according to the present invention (hereinafter sometimes simply referred to as heat sink A) uses an aluminum material excellent in thermal conductivity and formability, such as JIS 1000 series pure aluminum and JIS 6000 series aluminum alloy. It is manufactured by applying relatively simple processing such as cutting and bending based on the extruded aluminum material. Moreover, you may manufacture using other aluminum alloy materials, such as a JIS5000 series aluminum alloy material.

  FIG. 1 shows an embodiment of a heat sink A according to the present invention. The heat sink A includes a substrate portion 2 on which the LED light source 1 is disposed and fixed on the front side (the surface on the right corner corner portion side in FIG. 1), and a plurality of protrusions projecting from the back side of the substrate portion 2 with a gap therebetween. It is comprised from the fin part 3 arrange | positioned in parallel.

  The substrate portion 2 is a so-called L-shaped plate that is bent in a direction orthogonal to the longitudinal direction of the fin portions 3 arranged in parallel. In the present embodiment, the fin portion 3 is bent outward together with the substrate portion 2, but the bent portion of the fin portion 3 may be stretched to affect the bending processing of the substrate portion 2. It is necessary to shorten the projecting dimension of the fin portion 3 so as not to hinder.

  In addition, the said LED light source 1 mounts the several light emitting diode (LED) element on the board | substrate based on the aluminum alloy, for example.

  FIG. 2 shows a different embodiment of the heat sink A according to the present invention. Similarly to the heat sink A shown in FIG. 1, the heat sink A also has a substrate portion 2 in which the LED light source 1 is arranged and fixed on the front side (the surface on the right corner corner side in FIG. 2), and the back surface of the substrate portion 2. It is comprised from the several fin part 3 arrange | positioned in parallel which protrudes in the side at intervals.

  The substrate portion 2 is a so-called L-shaped plate that is bent in a direction orthogonal to the longitudinal direction of the fin portions 3 arranged in parallel. In the present embodiment, the fin portion 3 is bent inward together with the substrate portion 2, but the bent portion of the fin portion 3 may be affected by being compressed because the bent portion of the fin portion 3 is compressed. Therefore, it is necessary to shorten the projecting dimension of the fin portion 3 so as not to cause trouble.

  FIG. 3 shows still another embodiment of the heat sink A according to the present invention. Similarly to the heat sink A shown in FIG. 1, the heat sink A also has a substrate portion 2 on which the LED light source 1 is arranged and fixed on the front side (the surface on the right corner portion side in FIG. 2), and the back surface of the substrate portion 2. It is comprised from the several fin part 3 arrange | positioned in parallel which protrudes in the side at intervals.

  The substrate portion 2 is a so-called L-shaped plate that is bent in a direction orthogonal to the longitudinal direction of the fin portions 3 arranged in parallel. In the present embodiment, the fin portion 3 is bent outward together with the substrate portion 2. However, the fin portion 3 is bent before the substrate portion 2 is bent because the bending portion of the substrate portion 2 is hindered as it is. The part is provided with a linear notch reaching the outer surface of the substrate part 2. Thus, since the board | substrate part 2 is bent after forming a notch in the fin part 3, it is not necessary to shorten especially the protrusion dimension of the fin part 3 like embodiment shown in FIG. The heat dissipation can be performed more efficiently as compared with the embodiment shown in FIG.

  FIG. 4 shows still another embodiment of the heat sink A according to the present invention. Similarly to the heat sink A shown in FIG. 2, the heat sink A also has a substrate portion 2 on which the LED light source 1 is arranged and fixed on the front side (the surface on the left corner corner portion side in FIG. 2), and the back surface of the substrate portion 2. It is comprised from the several fin part 3 arrange | positioned in parallel which protrudes in the side at intervals.

  The substrate portion 2 is a so-called L-shaped plate that is bent in a direction orthogonal to the longitudinal direction of the fin portions 3 arranged in parallel. In the present embodiment, the fin portion 3 is bent inward together with the substrate portion 2. However, the fin portion 3 is bent before the substrate portion 2 is bent because the bending portion of the substrate portion 2 is hindered as it is. The part is provided with a V-shaped cut having an angle of 90 degrees or more reaching the outer surface of the substrate part 2. Thus, since the board | substrate part 2 is bent after forming the V-shaped notch in the fin part 3, it is not necessary to shorten especially the protrusion dimension of the fin part 3 like embodiment shown in FIG. The heat radiation from the LED illumination can be performed more efficiently as compared with the embodiment shown in FIG.

  As described above, the heat sink A for LED illumination described above is used as a heat sink A for an in-vehicle illumination such as a headlight of an automobile or an embedded illumination of a building. FIGS. 5 and 6 show the heat sink A of the embodiment shown in FIG. FIG. 7 and FIG. 8 show the state of use of the heat sink A of the embodiment shown in FIG. 4 as the heat sink A for LED lighting of the headlight of an automobile. Respectively.

  The heat sink A of the embodiment shown in FIG. 1 is the same as the heat sink A of the embodiment shown in FIG. 3 and the heat sink A of the embodiment shown in FIG. 2 is the same as the heat sink A of the embodiment shown in FIG. Since there is, explanation is omitted.

  As shown in FIGS. 5 and 6, the heat sink A of the embodiment shown in FIG. 3 is configured such that the L-shaped substrate portion 2 constitutes a part of the housing 4 that is a housing of LED lighting. It will be attached to the corner of lighting. In this manner, even in a narrow place where there is a space restriction where the heat sink A having the conventional flat substrate portion 2 as shown in FIG. 9 cannot be attached, the L-shape as shown in FIG. If the heat sink A having the substrate portion 2 is used (the same applies to the heat sink A shown in FIG. 1), the heat sink A can be attached.

  In addition, 5 is a translucent outer lens attached to the front of the LED illumination, and 6 is a reflector that reflects light emitted from the LED light source 1 toward the outer lens 5.

  As shown in FIGS. 7 and 8, the heat sink A of the embodiment shown in FIG. 4 is in a state in which one piece of the L-shaped substrate portion 2 constitutes a part of the housing 4 that is a housing for LED lighting. Will be attached. In this way, even in a narrow place where there is a space restriction where the heat sink A having the conventional flat plate-like substrate portion 2 as shown in FIG. 9 cannot be attached, the L-shape as shown in FIG. If the heat sink A having the substrate part 2 is used (the same applies to the heat sink A shown in FIG. 2), it can be attached.

  As described above, when one piece of the board portion 2 is attached in a state that constitutes a part of the housing 4 of the LED lighting, the other piece of the board portion 2 is externally connected to the LED lighting (in the case of an automobile) like the fin portion 3. The internal space in the bonnet protrudes, but a sufficient heat radiation area can be secured by the surface area of the L-shaped substrate portion 2 and the fin portion 3, so that a sufficient heat radiation amount can be secured. .

  Although the use state is not particularly illustrated, the heat sink A shown in FIGS. 2 and 4 can be attached to a corner portion having an intricate shape with space constraints.

A ... LED heat sink 1 ... LED light source 2 ... substrate part 3 ... fin part 4 ... housing 5 ... outer lens 6 ... reflector

Claims (3)

A heat sink for LED lighting formed from an aluminum extruded material,
The LED light source is composed of a substrate part arranged and fixed on the front side, and a plurality of parallelly arranged fin parts protruding with a gap on the back side of the substrate part,
The heat sink for LED lighting, wherein the substrate portion is L-shaped bent in a direction orthogonal to the longitudinal direction of the fin portion.   The fin portion protrudes to the outside of the substrate portion bent in an L shape, and a linear cut reaching the outer surface of the substrate portion during processing is formed in the bent portion of the fin portion. The heat sink for LED lighting according to claim 1, wherein is divided.   The fin portion protrudes to the inside of the substrate portion bent in an L shape, and the bent portion of the fin portion has a V-shaped notch whose angle reaching the inner surface of the substrate portion during processing is 90 degrees or more. The heat sink for LED lighting according to claim 1, wherein the fin portion is divided.

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