Airscrew for Toy Helicopter

Abstract

The present invention relates to an airscrew for a toy helicopter, comprising a rotating shaft directly connectable to a driving mechanism of the helicopter, two airscrew blades, a balance mechanism, said two airscrew blades respectively hinged to the rotating shaft so that a blade angle of the airscrew blade is able to change during the flight. In an embodiment, a middle portion of the balance mechanism is hinged to the rotating shaft, and each of two airscrew blades has an extending member, the balance mechanism is contacted with the extending member during the swing motion, such that the blade angle of the airscrew blade is changed. The present invention has a compact structure and a stable balancing capability, therefore, the disadvantages such as easy breakage of the link is avoided and the package volume is also reduced. The connecting member between the airscrew blades as well as the balance rod and the rotating shaft is thicker and has a bigger intensity, so it is not easy to be broken due to the falling of the helicopter, therefore, it can be used in a flyable toy or a prototype aircraft, and a vertical lift aerocraft.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority to and the benefit of the filing of Chinese Serial No. 2008200499611, entitled “Airscrew for Toy Helicopter”, filed on Jun. 25, 2008, and the specification and claims thereof are incorporated herein by reference.FIELD OF INVENTION[0002]The present invention relates to a flyable toy or a prototype aircraft, more particular, to an airscrew for the flyable toy helicopter or a prototype helicopter.BACKGROUND OF INVENTION[0003]A flyable electric toy helicopter is a kind of new fashion toy in recent years, since the mature developments in the battery being highly energized and the motor being microminiaturized, so that problems concerning the power for the flying and the time of the flying are solved.[0004]However, since the helicopter has less weight and is easy to be influenced by air flow, the torsion produced by the helicopter causes a poor flying stability of the helicopter and the flying is difficult to be...

AI Technical Summary

Benefits of technology

[0012]Accordingly, the first object of present invention is provides an airscrew for a toy helicopter, which can obtain a stable balance without a link, so that the shortage of the easy broken of the link is avoided.

[0018]The present invention has a compact structure and a stable balancing capability, therefore, the drawbacks such as easy breakage of the link are avoided and the package volume is also reduced. The connecting member between the airscrew blades as well as the balance rod and the rotating shaft is thicker and has a bigger intensity, so it is not easy to be broken due to the falling of the helicopter, therefore, it can be used in a flyable toy or a prototype aircraft, and a vertical lift aerocraft.

Problems solved by technology

However, since the helicopter has less weight and is easy to be influenced by air flow, the torsion produced by the helicopter causes a poor flying stability of the helicopter and the flying is difficult to be controlled.

Especially for the beginner, it is difficult to allow the helicopter to fly up smoothly and securely.

However, since the structure of the flight is too complicated due to the coaxial bi-airscrews and auxiliary rotating wing balance mechanism, a higher malfunction rate and a shorter life span occur, the angle between the rotational plane of the primary vane, the auxiliary rotating wing or the balance rod and the driving shaft is unchangeable so that effects in balance and stability are still poor.

However, the auxiliary rotating wing is located above the main rotating wing, so that the size of the helicopter is too large, the mechanical connecting bar for connecting the main rotating wing and the auxiliary rotating wing is easily to be broken or fallen off, and the horizontal blade of the auxiliary rotating wing will bring a larger resistance during the flight, so that is not good for playing.

However, the link is easily to be broken and damaged, and the balance rod is located above the rotating wing blade so that the size of the helicopter is too big, thereby it is difficult for the beginner to handle the connection position of the link.

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