| 摘要 |
PROBLEM TO BE SOLVED: To provide technical means for checking whether or not a posture before hitting a ball is appropriate in sports of hitting a ball with a tool and especially, technical means for checking a position of a club face with respect to a ball in an address in the golf.SOLUTION: A ball 10 of a stroke evaluation device 1 includes a pair of electrodes 12 and 14. The electrodes 12 and 14 are connected to a notification part 42 of a notification device 40. A player addresses the ball such that a club face 60 of a golf club 2 using a surface inside a meet area 62 of the club face 60 as a conductive surface, comes into contact with the electrodes 12 and 14 of the ball 10. When the electrodes 12 and 14 are conducted by the conductive surface within the meet area 62 of the club face 60, the notification part 42 is lit to notify of the conduction between the electrodes 12 and 14.SELECTED DRAWING: Figure 1 |
