Ceiling Fan

Abstract

A ceiling fan includes a fan unit and a plurality of blade units connected with the fan unit. Each of the blade units includes an upper blade, a lower blade combined with the upper blade, and a light source located between the upper blade and the lower blade. Thus, each of the blade units is made of a plastic material to decrease the cost of fabrication of the ceiling fan and to reduce the weight of the ceiling fan.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to an air conditioning device and, more particularly, to a ceiling fan.

2. Description of the Related Art

A conventional ceiling fan comprises a rod mounted on the ceiling, a motor unit connected with the rod, and a plurality of blades connected with the motor unit. Thus, the blades are rotated by operation of the motor unit to provide a ventilating or cooling function. However, each of the blades is made of wood material so that many trees are lumbered and cut for making the blades, thereby causing an environmental destruction. In addition, the conventional ceiling fan does not have decorative or lighting functions.

BRIEF SUMMARY OF THE INVENTION

In accordance with the present invention, there is provided a ceiling fan, comprising a fan unit and a plurality of blade units connected with the fan unit. Each of the blade units includes an upper blade, a lower blade combined with the upper blade, and a light source located between the upper blade and the lower blade.

The upper blade of each of the blade units is made of a transparent plastic material. The lower blade of each of the blade units is made of a transparent plastic material. The upper blade of each of the blade units has a side provided with at least one reinforcing strip. The lower blade of each of the blade units has a side provided with at least one reinforcing channel combined with the reinforcing strip of the upper blade. The reinforcing channel of the lower blade of each of the blade units is combined with the reinforcing strip of the upper blade by ultrasonic waves. The upper blade of each of the blade units has an edge provided with a flange. The lower blade of each of the blade units has an edge provided with a groove combined with the flange of the upper blade. The groove of the lower blade of each of the blade units is combined with the flange of the upper blade by ultrasonic waves. The light source of each of the blade units is mounted on the lower blade. The light source of each of the blade units is covered by the upper blade. The light source of each of the blade units is light emitting diode (LED) lamp. The light source of each of the blade units has multiple colors to enhance the aesthetic quality of each of the blade units. Each of the blade units has a first end and a second end and has a thickness that is increased gradually from the first end to the second end thereof Thus, each of the blade units is designed by an aerodynamic principle to have a tapered shape with a variable thickness, so as to reduce an electro-mechanical load, to increase its rotation speed, and to stabilize a downward air current.

According to the primary advantage of the present invention, each of the blade units is made of a plastic material to decrease the cost of fabrication of the ceiling fan.

According to another advantage of the present invention, each of the blade units is made of a plastic material to reduce the weight of the ceiling fan.

According to a further advantage of the present invention, the reinforcing channel of the lower blade of each of the blade units is combined with the reinforcing strip of the upper blade to increase the strength of each of the blade units so that each of the blade units will not be easily distorted or deformed.

According to a further advantage of the present invention, each of the blade units is made of a plastic material to reduce the starting power of a drive motor of the ceiling fan, thereby saving the electric energy.

According to a further advantage of the present invention, each of the blade units is made of a plastic material, without having to cut the wood of a tree, thereby achieving the purpose of environmental protection.

According to a further advantage of the present invention, each of the blade units includes a light source to provide a lighting function.

According to a further advantage of the present invention, each of the blade units has a tapered shape with a variable thickness, so as to reduce an electro-mechanical load, to increase its rotation speed, and to stabilize a downward air current.

Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING(S)

FIG. 1 is a perspective view of a ceiling fan in accordance with the preferred embodiment of the present invention.

FIG. 2 is an exploded perspective view of each of the blade units of the ceiling fan as shown in FIG. 1.

FIG. 2a is a locally enlarged view of an upper blade of each of the blade units of the ceiling fan as shown in FIG. 2.

FIG. 2b is a locally enlarged view of a lower blade of each of the blade units of the ceiling fan as shown in FIG. 2.

FIG. 3 is a side cross-sectional view of each of the blade units of the ceiling fan as shown in FIG. 2.

FIG. 4 is a side cross-sectional assembly view of the ceiling fan as shown in FIG. 3.

FIG. 5 is a side view of a blade unit of the ceiling fan as shown in FIG. 1.

DETAILED DESCRIPTION OF THE INVENTION

Referring to FIGS. 1-4, a ceiling fan in accordance with the preferred embodiment of the present invention comprises a fan unit 1 and a plurality of blade units 2 connected with the fan unit 1.

Each of the blade units 2 is made of a plastic material and includes an upper blade 21, a lower blade 22 combined with the upper blade 21, and a light source 23 located between the upper blade 21 and the lower blade 22.

The upper blade 21 of each of the blade units 2 is made of a transparent plastic material. The upper blade 21 of each of the blade units 2 has an edge provided with a flange 211 (see FIG. 2a). The upper blade 21 of each of the blade units 2 has a side provided with at least one reinforcing strip 212 (see FIG. 2a).

The lower blade 22 of each of the blade units 2 is made of a transparent plastic material. The lower blade 22 of each of the blade units 2 has an edge provided with a groove 221 (see FIG. 2b) combined with the flange 211 of the upper blade 21. Preferably, the groove 221 of the lower blade 22 of each of the blade units 2 is combined with the flange 211 of the upper blade 21 by ultrasonic waves. The lower blade 22 of each of the blade units 2 has a side provided with at least one reinforcing channel 222 combined with the reinforcing strip 212 of the upper blade 21. Preferably, the reinforcing channel 222 of the lower blade 22 of each of the blade units 2 is combined with the reinforcing strip 212 of the upper blade 21 by ultrasonic waves.

The light source 23 of each of the blade units 2 is mounted on the lower blade 22 and covered by the upper blade 21. Preferably, the light source 23 of each of the blade units 2 is light emitting diode (LED) lamp. The light source 23 of each of the blade units 2 has multiple colors to enhance the aesthetic quality of each of the blade units 2.

As shown in FIG. 5, each of the blade units 2 has a first end and a second end and has a thickness that is increased gradually from the first end to the second end thereof Thus, each of the blade units 2 is designed by an aerodynamic principle to have a tapered shape with a variable thickness, so as to reduce an electro-mechanical load, to increase its rotation speed, and to stabilize a downward air current.

Accordingly, each of the blade units 2 is made of a plastic material to decrease the cost of fabrication of the ceiling fan. In addition, each of the blade units 2 is made of a plastic material to reduce the weight of the ceiling fan. Further, the reinforcing channel 222 of the lower blade 22 of each of the blade units 2 is combined with the reinforcing strip 212 of the upper blade 21 to increase the strength of each of the blade units 2 so that each of the blade units 2 will not be easily distorted or deformed. Further, each of the blade units 2 is made of a plastic material to reduce the starting power of a drive motor of the ceiling fan, thereby saving the electric energy. Further, each of the blade units 2 is made of a plastic material, without having to cut the wood of a tree, thereby achieving the purpose of environmental protection. Further, each of the blade units 2 includes a light source 23 to provide a lighting function. Further, each of the blade units 2 has a tapered shape with a variable thickness, so as to reduce an electro-mechanical load, to increase its rotation speed, and to stabilize a downward air current.

Although the invention has been explained in relation to its preferred embodiment(s) as mentioned above, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the present invention. It is, therefore, contemplated that the appended claim or claims will cover such modifications and variations that fall within the true scope of the invention.

Claims

1. A ceiling fan, comprising:

a fan unit; and

a plurality of blade units connected with the fan unit; wherein:

each of the blade units includes:

an upper blade;

a lower blade combined with the upper blade; and

a light source located between the upper blade and the lower blade.

2. The ceiling fan of claim 1, wherein the upper blade of each of the blade units is made of a transparent plastic material.

3. The ceiling fan of claim 1, wherein the lower blade of each of the blade units is made of a transparent plastic material.

4. The ceiling fan of claim 1, wherein:

the upper blade of each of the blade units has a side provided with at least one reinforcing strip; and

the lower blade of each of the blade units has a side provided with at least one reinforcing channel combined with the reinforcing strip of the upper blade.

5. The ceiling fan of claim 4, wherein the reinforcing channel of the lower blade of each of the blade units is combined with the reinforcing strip of the upper blade by ultrasonic waves.

6. The ceiling fan of claim 1, wherein:

the upper blade of each of the blade units has an edge provided with a flange; and

the lower blade of each of the blade units has an edge provided with a groove combined with the flange of the upper blade.

7. The ceiling fan of claim 6, wherein the groove of the lower blade of each of the blade units is combined with the flange of the upper blade by ultrasonic waves.

8. The ceiling fan of claim 1, wherein the light source of each of the blade units is mounted on the lower blade.

9. The ceiling fan of claim 1, wherein the light source of each of the blade units is covered by the upper blade.

10. The ceiling fan of claim 1, wherein the light source of each of the blade units is light emitting diode (LED) lamp.

11. The ceiling fan of claim 1, wherein the light source of each of the blade units has multiple colors to enhance the aesthetic quality of each of the blade units.

12. The ceiling fan of claim 1, wherein:

each of the blade units has a first end and a second end and has a thickness that is increased gradually from the first end to the second end thereof; and

each of the blade units is designed by an aerodynamic principle to have a tapered shape with a variable thickness, so as to reduce an electro-mechanical load, to increase its rotation speed, and to stabilize a downward air current.