Blades of a ceiling fan (2)

Abstract

The blades of a ceiling fan are respectively provided with a top surface, a bottom surface, a front wind-confronting portion and a rear wind-confronting portion respectively formed along an edge of two sides of the top surface and the bottom surface. The front wind-confronting portion and the rear wind-confronting portion wind-confronting portion are respectively formed of a slope having the same inclined direction. No matter if the top surface or the bottom surface faces downward after having the blades fixed with a shaft of a motor, the area of the front wind-confronting portion or the rear wind-confronting portion confronting air is always such minimized that air drag can be lowered. Moreover, with the top surface and the bottom surface attached with different patterns, various pattern combinations can be obtained to diversify the outlook of the ceiling fan.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]This invention relates to a ceiling fan, particularly to one whose blades are respectively provided with a front wind-confronting portion and a rear wind-confronting portion that are respectively formed along two sides of the blades so as to lower air drag for promoting power efficiency, with a top surface and a bottom surface interchangeable.[0003]2. Description of the Prior Art[0004]Commonly, as shown in FIG. 1, a conventional ceiling fan 10 is mainly composed of a motor 11 and plural blades 12. The motor 11 is fixed at a certain position, provided with a shaft 111 pivotally positioned at its front for being driven by the motor 11 to rotate. The blades 12 are equidistantly fixed around the shaft 111 to create air flow while being whirled by the shaft 111. As shown in FIGS. 2 and 3, in order to lower air drag while the blades 12 rotate, each of the blades 12 is provided with a wind-confronting portion 121 formed downwa...

AI Technical Summary

Benefits of technology

"The invention is about offering blades for a ceiling fan that can be flipped over without losing power efficiency. Each blade has a top and bottom surface with wind-confronting portions that face air in opposite directions. The front and rear wind-confronting portions are formed of a slope with the same inclined direction. This design minimizes air drag and allows for different pattern combinations to create a unique appearance for the ceiling fan."

Problems solved by technology

But the conventional ceiling fan is always made commonplace, it has to be replaced with a new one in case that it cannot match with a decorative environment, posing a further economic burden.

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