Miniature fan assembly for outputting air in a certain direction

DETAILED DESCRIPTION It is an object of the present invention to provide a miniature fan assembly which may output air in a certain direction and which includes only one outlet for enforcing the air output effect.
It is another object of the present invention to provide a miniature fan assembly which may be quickly assembled.
It is a further object of the present invention to provide a miniature fan assembly in which the electric wires for the fan are prevented from being damaged by an external force or the fan blades.
A miniature fan assembly in accordance with the present invention generally comprises a base, a coil seat, a fan, and a top plate.
The base includes a recess defined therein and an outlet defined in a peripheral wall thereof which defines the recess.
The coil seat is mounted in the recess of the base.
The coil seat and the peripheral wall of the base together define a helical air passage therebetween.
The coil seat further includes an axle hole defined therein and a coil mounted therearound.
The fan is mounted above the coil seat.
The fan includes a head portion with a peripheral wall and a plurality of fan blades extending outwardly from the peripheral wall of the head portion.
The fan further includes an axle which is rotatably received in the axle hole of the coil seat.
The peripheral wall of the head portion defines a hollow interior therein for accommodating the coil seat.
The top plate is mounted above the fan, and means is provided for securely engaging the base with the top plate.
Preferably, each fan blade (preferably of axial type) extends in an angle of 45 degrees with respect to the peripheral wall of the head portion of the fan.
Each fan blade may have a concave underside which faces the coil.
A bottom wall defining the recess of the base includes a second recess defined therein, and a wire channel is defined in the bottom wall of the base and includes a first end in communication with the second recess and a second end in communication with an environment.
An electric wire is extended through the wire channel and has a first end electrically connected to the coil and a second end adapted to be electrically connected to a power source