THIN FAN STRUCTURE
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United States of America Patent
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Issued Date -
Oct 29, 2015
app pub date -
Apr 23, 2014
filing date -
Apr 23, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
A thin fan structure includes a case, a fan impeller, a circuit board, a silicon steel sheet and a winding assembly. The case has a receiving space and a bearing cup protruding into the receiving space. The bearing cup is formed with a bearing hole. The fan impeller has a hub section, multiple blades and a shaft extending from a center of the hub section. A magnetic member is annularly disposed on inner circumference of the hub section. The circuit board is disposed in the receiving space. The silicon steel sheet disposed on the circuit board has a base section and multiple first magnetic conductive sections, which together define a receiving space. The winding assembly is fixedly disposed in the receiving space. The winding assembly has a bottom section attached to the base section and a side section attached to the first magnetic conductive sections.
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