1. Field of the Invention
The present invention relates generally to a band-type fan structure, and more particularly to a band-type fan structure, which has a greatly minified volume. Also, the band-type fan structure improves the shortcoming of unstable operation of the conventional fan due to deflection of the blades.
2. Description of the Related Art
Along with the continuous advance of electronic technologies and industries, the density of transistors of various chips (such as central processor and execution unit) has been more and more increased. This enables the central processor to process data at higher and higher speed. However, the power consumption and heat generated by the central processor have also become higher and higher. In order to keep the central processor stably operating, it has become an important topic how to develop high-efficiency heat dissipation unit for dissipating the heat generated by the central processor.
In order to keep a high-efficiency heat dissipation function, the heat dissipation unit has inevitably become larger and larger and heavier and heavier. However, in design of electronic device such as laptop, tablet, intelligent mobile phone and intelligent handheld electronic device, the limitation of space is always a greatest bottleneck of the design process.
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In order to meet the requirements for lightweight, slimness and miniaturization, the respective components are as minified as possible. Therefore, the centrifugal fan is miniaturized. However, due to the miniaturization of the volume, the blades of the miniaturized centrifugal fan are very thin and have a large area. As a result, the blades are easy to deflect to cause more vibrations and make louder noise.
According to the above, the conventional fan module has the following shortcomings:
1. The volume is larger.
2. The blades tend to deflect to cause unstable operation.
It is therefore a primary object of the present invention to provide a band-type fan structure, which has a greatly minified volume.
It is a further object of the present invention to provide the above band-type fan structure, which improves the shortcoming of unstable operation of the conventional fan due to deflection of the blades.
To achieve the above and other objects, the band-type fan structure of the present invention includes a transmission band body and multiple blades. The transmission band body is an elongated band body. The blades are side by side disposed on the transmission band body in parallel to each other. Each blade has a main body disposed on a surface of the transmission band body and a first end outward extending from the main body and protruding from the transmission band body. Each two adjacent blades define therebetween a flow way. When the transmission band body is continuously reciprocally moved, the blades are driven by the transmission band body to continuously reciprocally move.
In the above band-type fan structure, the main bodies of the blades are disposed on the surface of the transmission band body with the first ends of the blades protruding from the transmission band body. A power member is electrically connected to the transmission band body. When the power member is turned on, the power member drives the transmission band body to continuously linearly reciprocally move, whereby the blades are driven by the transmission band body to continuously reciprocally move. Under such circumstance, the air originally stationary in the flow ways is disturbed by the blades driven by the continuously reciprocally moved transmission band body to create airflow. The airflow will be continuously compressed between the blades driven by the transmission band body to flow to the first ends to produce an air volume. Therefore, by means of moving the flow ways and the blades relative to each other, the surrounding airflow is changed to produce the air volume. Accordingly, the band-type fan has a greatly minified volume and can be used instead of the conventional fan, which has an excessively large total volume. Moreover, the band-type fan structure improves the shortcoming of unstable operation of the conventional fan due to deflection of the blades.
The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings, wherein:
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In this embodiment, the blade 21 has a wing-shaped configuration. The wing-shaped configuration has an aerodynamic property that the shape of the blade 21 can change the direction of the force, for example, change a horizontal force into lifting force or change a horizontal rotational torque into a vertical push force.
In addition, the first end 213 of the blade 21 can be made of a flexible material. Due to the property of the flexible material, when the transmission band body 20 is continuously linearly reciprocally moved, the swing amplitude of the first end 213 of the blade 21 is larger than that of the blade 21 made of common inflexible material. In this case, the air volume produced is consequentially relatively larger.
Therefore, when the transmission band body 20 is continuously linearly reciprocally moved, the blades 21 are driven by the transmission band body 20 to continuously reciprocally move. Under such circumstance, the air originally stationary in the flow ways is disturbed by the blades 21 driven by the continuously reciprocally moved transmission band body 20 to create airflow. The airflow will be continuously compressed between the blades 21 driven by the transmission band body 20 to flow to the first ends to produce an air volume. Therefore, by means of moving the blades and the flow ways relative to each other, the surrounding airflow is changed to produce the air volume. Accordingly, the band-type fan has a greatly minified volume and can be used instead of the conventional fan, which has an excessively large total volume. Moreover, the band-type fan structure improves the shortcoming of unstable operation of the conventional fan due to deflection of the blades.
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The transmission band body 20 further defines a passageway 205 in communication with the connected sections 204. The band-type fan structure further includes a power member 3 electrically connected to the transmission band body 20, whereby the blades 21 can be driven by the transmission band body 20 to continuously reciprocally move. The power member 3 has at least one transmission shaft 31 and a power source 32. The transmission shaft 31 is positioned on two sides of the passageway 205 and connected with the power source 32.
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In conclusion, in comparison with the conventional fan structure, the present invention has the following advantages:
1. The volume of the fan structure is greatly reduced.
2. The shortcoming of unstable operation of the conventional fan structure due to deflection of the blades is improved.
The present invention has been described with the above embodiments thereof and it is understood that many changes and modifications in the above embodiments can be carried out without departing from the scope and the spirit of the invention that is intended to be limited only by the appended claims.
The present application is a Continuation-in-Part of U.S. patent application Ser. No. 13/670,459, filed on Nov. 7, 2012, titled Band-Type Fan Structure, listing Bor-Haw Chang and Liang-Ji Chang as inventors, herein incorporated by reference in its entirety.
Number | Date | Country | |
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Parent | 13670459 | Nov 2012 | US |
Child | 14938605 | US |