Foot positioning learning device for e.g. sporting event, has bearing bushes connected together using capillary tube, such that sound signal is triggered when pressure of foot of human body on bearing bushes is not exerted in uniform manner

摘要

The device has two bearing bushes (9, 10) connected together using a capillary tube (3), such that a sound signal is triggered when pressure of foot of a human body on the bearing bushes is not exerted in an uniform manner. Cavities of the bearing bushes are hermetic and filled with liquid or gaseous substance. An electric battery is fixed to a membrane of the bushes, which is used as a bearing surface.