A kinematic force detection mechanism, a kinematic keel equipped with a gravitational force detection mechanism, and a method of using the kinematic keel

摘要

A gravitational force detection device, a sports ball having the gravitational force detection device and a method of using the same are provided. The movement means includes a grip portion 12 formed of a cylindrical flexible member and a seal member 13 for sealing the both ends of the grip portion 12 and forming a deformable seal space 18 surrounded by the grip portion 12 A pressure sensor 28 which is held in the sealing member 16 and which detects the pressure in the closed space 18 and a reference grip force which is not more than the maximum gripping force detected by the pressure sensor 28, And a control section for displaying the gripping force of the user holding the grip section 12 on the display section 7 by detecting it as pressure.