| 摘要 |
A ring-shaped heat dissipating device made of a continuously-bending metal sheet includes a plurality of fins arranged in a radial form to form a central passage communicating from theretop to therebottom. Each of fins has a top plate, a front side plate and a rear side plate extending downwardly from opposite edges of the top plate respectively, and a bottom plate extending from a bottom edge of the rear side plate. The front side plate of one of fins connects with the bottom plate of another fin adjacent thereto. An inner edge of the top plate of one of fins adjacent to the central passage is connected with another two inner edges of two top plate plates of two fins adjacent thereto. And an inner edge of the bottom plate is connected with another two inner edges of two bottom plates of two fins adjacent thereto.
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