BRIEF DESCRIPTION OF THE DRAWING
For a more complete understanding of the present invention, reference will now be made to the following detailed description of preferred embodiments taken in conjunction with the following accompanying drawings.
FIG. 1 is an exploded view of a fan according to an embodiment of the present invention.
FIG. 2 is a perspective view of the fan according to an embodiment of the present invention.
FIG. 3 is a perspective view of a fan during the operation of the fan according to an embodiment of the present invention.
FIG. 4 is a perspective view of the fan having an additional buckle according to another embodiment of the present invention.
DETAIL DESCRIPTION OF THE INVENTION
Referring to FIG. 1 and 2, the fan comprises a base 10, a fan 11, a resilient element 12 and a buffer 13. The base 10 comprises a hollow axle sleeve 101 having a distal end 1011, a primal end 1012 and a protrusion 1013 formed on an inner sidewall thereof. In the present embodiment of the present invention, the primal end 1012 of the axle sleeve 101 is hollow, but it not limited as such, the primal end 1012 of the axial sleeve 101 may also be a closed end. The axial sleeve 101 comprises at least one axle 102 (two axles 102a and 102b are shown in FIG. 1 and 2). The axles 102a and 102b are penetrated into the axial sleeve 101 from the distal end 1011 and the primal end 1012 respectively until they come in contact with the two sides of the protrusion 1013. At least one stator 103 is concentrically positioned surrounding the outer wall of the axial sleeve 101.
The fan 11 comprises a plurality of blades 112 extending outward and an axis 113 connected to the inner side of the fan 11. A resilient element 12 is disposed around the axis 113. The resilient element 12 is preferably a spring or elastic plate. The axis 113 comprises a neck 1131 positioned at an end 1132 thereof. The fan 11 has at least one rotary axis 114 positioned at the inner side of the fan 11 concentric to the stator 103.
The buffer 13 may be a spring or an elastic plate, or a plastic polymeric material, for example, silicon. The buffer 13 is penetrated into the axial sleeve 101 from the primal end 1012 of the axial sleeve 101.
The end 1132 of the axis 113 is penetrated through the axle 102 (the preferred embodiment shows the axis penetrating through the axle 102a and 102b) and the buffer 13 so that the neck 1131 is concentrically positioned within the buffer 13, and the buffer 13 is positioned between the axle 102b and the end 1132 of the axis 113.
Furthermore, a first buckle 14 is adopted to buckle the neck 1131 to position the washer 14 between the axle 102b and the buffer 13 to securely position the axis 113.
Referring to FIG. 3, when the fan 11 rotates, because size and the weight of the blades 112 are not identical to each other, and therefore the weight distribution around the axis 113 is not uniform. Thus, the axis 113 is not stable and vibrates up and down (as indicated by the arrow in FIG. 3). The resilient element 12 positioned around the axis 113 readily absorbs the downward vibrations while the buffer 13 readily absorbs the upward vibrations. Thus, the vibration of the fan 11 can be readily absorbed by the resilient element 12 and the buffer 13 and thereby reduce the vibration generated by the fan 11 and prevent the noise from transferring to the axle 102 (102b in FIG. 3) and the first washer 14.
Referring to FIG. 4, the neck 1131 of the axis 113 comprises a second washer 15 positioned between the buffer 13 and the end 1132 of the axis 113. Thus, the range of the buffer 13 contacting the end 1132 of the axis 113 is increased by the second washer 15, and the buffer 13 can be more securely positioned around the neck 1131 to prevent the buffer 13 from coming loose from the axis 113.
While the invention has been described in conjunction with a specific best mode, it is to be understood that many alternatives, modifications, and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications, and variations in which fall within the spirit and scope of the included claims. All matters set forth herein or shown in the accompanying drawings are to be interpreted in an illustrative and non-limiting sense.
Patent Application
20080031736
