Heat radiating fin
A heat radiating fin includes a flat body having a front side and a rear side, a plurality of protruded portions formed on the front side of the flat body, and a plurality of recessed portions correspondingly formed on the rear side of the flat body behind the protruded portions. The protruded portions on the flat body of a first heat radiating fin are partially extendable into corresponding recessed portions on the flat body of a second heat radiating fin located before the first one, allowing the first and the second heat radiating fins to be easily and stably stacked.
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The present invention relates to a heat radiating fin, and more particularly to heat radiating fins that can be easily manufactured to have enhanced structural strength and be stably stacked to form a heat sink.
BACKGROUND OF THE INVENTIONWith the constantly developed technologies, many electronic elements in electronic apparatus and devices operate at an increasingly high speed and produce more heat than before. As a result, there is an urgent demand for an improved heat sink. A conventional heat sink usually includes a large number of stacked heat radiating fins to achieve an enhanced heat radiating and dissipating effect. Therefore, it has become an important task for the electronic industrial field to research and develop newer, more efficient, and cost-effective heat radiating fins.
To fabricate the conventional heat radiating fin 1, first bend two lateral sides thereof to form the two bent edges 11, and then form the receiving slots 111 and retaining catches 112 on the bent edges 11 by stamping or other suitable ways. Therefore, the forming of the conventional heat radiating fin 1 involves in many complicated machining procedures, and the forming of the heat sink by assembling the heat radiating fins 1 takes a lot of time and labor. Moreover, the forming of the receiving slots 111 and the retaining catches 112 by stamping produces a large quantity of scraps and is subject to high bad yield to further increase the overall cost of the heat radiating fin 1.
When the conventional heat radiating fin 1 is dismounted from the assembled heat sink, the receiving slots 111 and the retaining catches 112 on the bent edges 11 will more or less become deformed due to the external pressure applied to the heat radiating fin 1 for dismounting it from the assembled heat sink. Therefore, when the heat radiating fin 1 dismounted from the assembled heat sink is remounted to the heat sink, it would usually fail to fitly and tightly engage with other heat radiating fins 1 as before, and tends to separate therefrom.
In brief, the conventional heat radiating fin 1 has the following disadvantages: (1) it requires extra time and labor to fabricate; (2) many complicated fabricating procedures are involved to increase the manufacturing cost; (3) a large quantity of scraps is produced; and (4) the receiving slots and the retaining catches are easily deformed under external force, preventing the dismounted heat radiating fin from being fitly and tightly remounted to the heat sink. It is therefore tried by the inventor to develop an improved heat radiating fin to overcome the drawbacks in the conventional heat radiating fin.
SUMMARY OF THE INVENTIONA primary object of the present invention is to provide a heat radiating fin that enables easy assembling of it to other ones to form a heat sink and may be dismounted from and remounted to the heat sink without deformation.
Another object of the present invention is to provide a heat radiating fin that can be fabricated with largely reduced material without producing a large quantity of scraps.
A further object of the present invention is to provide a heat radiating fin that can be quickly fabricated at decreased labor and time to lower the overall cost thereof.
To achieve the above and other objects, the heat radiating fin according to the present invention includes a flat body having a front side and a rear side, a plurality of protruded portions formed on the front side of the flat body by way of stretching or drawing to have a predetermined height, and a plurality of recessed portions correspondingly formed on the rear side of the flat body behind the protruded portions. The protruded portions on the flat body of a first heat radiating fin are partially extendable into corresponding recessed portions on the flat body of a second heat radiating fin located before the first one, allowing the first and the second heat radiating fin to be easily and stably stacked.
The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings, wherein
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When a plurality of the heat radiating fins A are stacked and assembled for forming a heat sink, the protruded portions 311 on the flat body 3 of a first heat radiating fin A are partially extended into corresponding recessed portions 321 on the flat body 3 of a second heat radiating fin A located before the first heat radiating fin A, with upper peripheral walls 3111 of the protruded portions 311 bearing against inner rims 3211 of the recessed portions 321 as can be more clearly seen in
The flat body 3 of the heat radiating fin A may be further provided on the front side 31 at predetermined positions with one or more spacer protrusions 312 formed by stretching or drawing to have a predetermined height, such that when any two flat bodies 3 are stacked, the spacer protrusions 312 on the first flat body 3 are in contact with the rear side 32 of the second flat body 3 located before the first flat body 3, allowing the two flat bodies 3 to always maintain a fixed spacing B between them and preventing the protruded portions 311 on the first flat body 3 from excessively extending into the recessed portions 321 on the second flat body 3.
The flat body 3 of the heat radiating fin A is also provided at predetermined positions with at least one assembling through hole 313, via which a heat pipe 4 is extended to associate with the flat body 3.
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The present invention has been described with some preferred embodiments thereof and it is understood that many changes and modifications in the described embodiments can be carried out without departing from the scope and the spirit of the invention that is intended to be limited only by the appended claims.
Claims
1. A heat radiating fin, comprising a flat body having a front side and a rear side, a plurality of protruded portions formed on the front side of the flat body, and a plurality of recessed portions correspondingly formed on the rear side of the flat body behind the protruded portions; and the protruded portions on the flat body of a first heat radiating fin being partially extendable into corresponding recessed portions on the flat body of a second heat radiating fin located before the first heat radiating fin, allowing the first and second heat radiating fins to be stably stacked.
2. The heat radiating fin as claimed in claim 1, wherein the protruded portions are provided around an outer surface at a predetermined position with a plurality of dots to prevent the protruded portions from being excessively extended into the corresponding recessed portions.
3. The heat radiating fin as claimed in claim 1, wherein the protruded portions are provided around an outer surface at a predetermined position with an annular rib to prevent the protruded portions from being excessively extended into the corresponding recessed portions.
4. The heat radiating fin as claimed in claim 1, wherein the protruded portions are provided around an outer surface at a predetermined position with a plurality of spaced ribs to prevent the protruded portions from being excessively extended into the corresponding recessed portions.
5. The heat radiating fin as claimed in claim 1, wherein the protruded portions are provided around an outer surface at a predetermined position with a plurality of spaced and raised areas to prevent the protruded portions from being excessively extended into the corresponding recessed portions.
6. The heat radiating fin as claimed in claim 1, further comprising at least one spacer protrusion of a predetermined height formed on the front side of the flat body; whereby when the first and second flat bodies are stacked, the spacer protrusion on the first flat body is in contact with the rear side of the second flat body, allowing the stacked first and second flat bodies to always maintain a fixed spacing therebetween.
Type: Application
Filed: Apr 11, 2008
Publication Date: Jun 4, 2009
Applicant: Asia Vital Components Co., Ltd. (Sinjhuang City)
Inventor: Kuo-Sheng Lin (Sinjhuang City)
Application Number: 12/082,704
International Classification: F28F 7/00 (20060101);