| 摘要 |
PURPOSE:To display the weight and the centroidal position of a ball hitting tool by measuring a load at a ball hitting part side with a first load measuring means and the load at a grip side with a second load measuring means, and computing the load from measured loads and a distance between first and second fulcra and a distance between an abutting body and the second fulcrum. CONSTITUTION:A racket frame 18 is placed on a first racket fulcrum 19 fitting in the center of a scale 26, and the grip 20 is placed on a second racket fulcrum 21, and a grip end 20a is abutted with the abutting body 22. A load cell 23 measures the load at a racket frame 18 side, and a load cell 24 measures the load at the grip 20 side of the racket 17, and the adder 45 of a CPU 44 computes the weight of the racket 17, and a weight display 39 displays the weight of the racket 17. Also, the CPU 44 computes the distance from the abutting body 22 to the centroidal position of the racket 17 based on the measured load and the distance between the first and second racket fulcra 19, 21, and the distance between the abutting body 22 and the racket fulcrum 21, and a weight position display 40 displays the centroidal position. |
