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Hula Satellite / hula hoop

Hula Satellite
Hula Satellite

Hula hoop has long been a well known sports equipment through out the world. Nevertheless, many hula hoops are gradually discarded these days due to three reasons:
A. is so huge that people have no enough space to use hula hoop in narrow room.
B. It is difficult to be stored.
C. It probably hits people near the user.
This design is based on the principle of centripetal force. By twisting the waist, the metal ball inside would roll along the tube.The movement of ball’s gravity keeps the user working. Without large volume, it has the same effect as general hula hoops, and can be used in small space.

University

National Cheng Kung University

National Cheng Kung University
Tainan, Taiwan

Design

National Cheng Kung University

National Cheng Kung University
Tainan, Taiwan

Hsiang-Yu Lai, Yi-Ting Chien