Patent ID: 6755072
Filing Date: 2004-06-29
Classification: A63B

Abstract:
A testing device comprising: a first joint extending upright from a base, a final joint on which a holder for holding a grip of a ball-hitting tool is installed, and an intermediate joint disposed between said first and final joints,wherein said first, intermediate, and final joints are successively connected to each other and rotated by individual driving motors in such a way that said ball-hitting tool held by said holder installed on said final joint is swung in any of perpendicular X-, Y-, and Z-directions; rotated around a longitudinal axis of said ball-hitting tool held by said holder in order to adjust, increase or decrease a distance between a ball-hitting plane and said base, corresponding to a motion of a person swinging his or her arm up and down with said person gripping said ball-hitting tool; swung so as to adjust or change an angle between said ball-hitting plane and said base, corresponding to an inward rotation of said arm or an outward rotation thereof; and swung so as to adjust or change an angle between a longitudinal axis of said ball-hitting tool and said base, wherein said intermediate joint connected to said first and final joints having a swing device for swinging a body includes a lower arm joint (L-axis) connected to an upper end of said first joint (S1-axis) and swinging in a front-to-back direction; an upper arm joint (U-axis) connected to said lower arm joint (L-axis) and swinging in a vertical direction; a wrist joint (R-axis) connected to said upper arm joint (U-axis) and rotating on a longitudinal axis thereof; a wrist-swinging joint (B-axis) connected to one end of said wrist joint (R-axis) and rotating in a vertical direction; and a wrist rotation joint (T1-axis) connected to said wrist-swinging joint (B-axis) and swinging in a left-to-right direction, and wherein a wrist-speed-up-rotation-joint (T2-axis) horizontally swinging is provided on said wrist rotation joint as said final joint; an extension plate is installed on said final joint; and said holder for holding said ball-hitting tool consisting of a tennis racket is held on one end of said extension plate.