| 摘要 |
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.
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