Patent Application
20140373355
1. Technical Field
The present disclosure relates to a method for manufacturing a fan rotor typically used in a fan of an electronic device.
2. Description of Related Art
With the continuing development of electronics technology, the operating speeds of processors, memory cards, etc. of electronic devices such as notebook computers have become faster. Therefore components such as processors generate much heat requiring removal. Heat dissipation apparatuses equipped with a fan are traditionally disposed in electronic devices to help transfer the heat from the processor to the outside of the electronic device. Thus a normal, stable operating temperature of the processor is maintained.
However, with the miniaturization of many electronic devices, in order to use space more effectively, a shape of the rotor of a conventional fan is quite complex. In addition, the fan rotor is normally manufactured by way of injection molding or a metal die-casting molding process. Due to limitations inherent in these manufacturing processes, a thickness of each blade of the fan rotor is relatively large. This restricts the complexity with which the fan rotor can be made, and restricts the degree to which the fan rotor can be miniaturized. Furthermore, the mold used in these manufacturing processes has a complex structure, and so the cost of fabricating the mold is great.
Therefore, a method for manufacturing a fan rotor which is capable of overcoming the above-described shortcomings is desired.
Many aspects of the present disclosure can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, and certain one or more of the views are schematic; the emphasis instead being placed upon clearly illustrating the principles of the present disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views.
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An outer periphery of the blade-portion 12 is cut by the stamping process to define a plurality of uniform blades 121, which are coplanar with each other. Each of the blades 121 includes a first long side 122, a second long side 123 opposite to the first long side 122, a first short side 124, and a second short side 125 opposite to the first short side 124. The first short side 124 of each blade 121 is positioned adjacent to the hub 11, and the second short side 125 is positioned remote from the hub 11. An outer end of each blade 121 is located more counterclockwise than an inner end of the blade 121. The first short side 124 of one blade 121 divides the second long side 123 of the left adjacent blade 121 into a first portion 1231 and a second portion 1232, with the first portion 1231 positioned generally adjacent to the hub 11, and the second portion 1232 positioned remote from the hub 11. In particular, the first long side 122, the first short side 124, the second short side 125, and the second portion 1232 of the second long side 123 of each blade 121 are cut by the stamping process such that they all have discrete edges. The first portion 1231 of the second long side 123 remains integrally connected with an inner periphery of the blade-portion 12 (even though the first portion 1231 is shown with a line in
In this embodiment, the shapes and sizes of the blades 121 are uniform. An inner diameter of the blade-portion 12 is defined as r. A shortest distance between the point O and an extension line L of the first long side 122 of each blade 121 is constant, and is defined as d. The values of d and r meet the following relationship: 0<d<r.
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In summary, for each of the above-described embodiments, the metal sheet 10, 20 is stamped to obtain a certain modified discoid shape. Then a curling process, and then a bending or a twisting/stretching process, are applied to the blades 121, 221 to form the final shape and position of the blades 121, 221. These methods circumvent the conventional need for fabricating molds, and thus can decrease the cost of mass producing fan rotors. Additionally, the thickness of each blade 121, 221 can be significantly less than that of blades of conventional fan rotors. Thereby, for any given electronic device having a particular amount of space available to accommodate a fan, the fan rotor 1, 1a with the blades 121, 221 can provide more blades per unit volume. Thus, the heat dissipating performance provided by a fan employing the fan rotor 1, 1a can be improved.
Even though aspects of particular embodiments are shown in the drawings and corresponding descriptions are provided herein, the entire disclosure is by way of illustration only. The principles and the features of the present disclosure may be employed in various and numerous embodiments thereof without departing from the scope of the disclosure. The above-described embodiments illustrate the scope of the disclosure but do not restrict the scope of the disclosure.
| Number | Date | Country | Kind |
|---|---|---|---|
| 102122017 | Jun 2013 | TW | national |
