| 摘要 |
A tilting rotational recreational device which has a platform on which the user stands, which platform is freely rotatable upon a bearing. The angle of the platform with respect to the horizontal may be adjusted so that a user standing or sitting on the platform may induce rotational movement of the platform easily by shifting his or her center of mass. One or more additional bearings placed internally in the device optionally provide random and unpredictable rotational movements of the platform, depending on the nature of the user's shift of mass. The device may be looked into a particular angle adjustment, and all internal parts may be held securely together to facilitate safe and reliable use. |
