US 7,604,459 B2 · Fan frame structure

Abstract

The present invention relates to a fan frame structure, which is composed of a plastic seat and a metal circular casing. At least two opposing guard fences disposed in a radial manner and extended upwards from a top edge of said seat. A fitting rim for inserting the metal circular casing is provided between an inner surface of the guard fence and a top surface of the seat. A side column is extended from a top side of the guard fence to cover and support the metal circular casing. Accordingly, the use of costly metal material can be reduced to lower the production cost, and the decrease of strength and deformation of the fan frame structure due to high temperature can be prevented. Meanwhile, the frame wall thickness can be reduced to enlarge the fan blade, thereby increasing air flow, fan speed and heat dissipation performance of a cooling fan.

Claims12

Dependent claims

A fan frame structure, comprising:

a seat made of a plastic material, having a hollow containing space therein, and equipped with a base integrally integrated with said seat by means of a plurality of ribs, and a driving device and a fan rotor disposed on said base;
and
a metal circular casing made of a metal material, corresponding to said hollow containing space of said seat, and tightly combined with said seat;
wherein at least two corresponding guard fences are disposed in a radial manner and extended upwards from a top edge of said seat, a fitting rim for said metal circular casing to be inserted is formed between an inner surface of each of said guard fences and a top surface of said seat, and a side wall is extended from a top surface of each of said guard fences and has a fixing hole disposed thereon.

1 more element

Dependencies are inferred from the claim text.

Fan frame structure

Life of this patent

Fan frame structure

Life of this patent

Abstract

Claims12