| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a golf club overcoming bad habit of swinging. <P>SOLUTION: A holder 14 to be attached to a shaft 11 of this golf club is formed with a slice groove 21 in a position of 45°in the opposite direction to a ball driving direction using an intersection between a reference axis S being in parallel to a club face F and orthogonal to a central axis O of the shaft 11 and a holder outer circumferential face in a player side as a reference point SO, and a hook groove 22 in a position of 30°from the datum point SO in the ball driving direction T. When a player swings the club with a fin attached in the slice groove 21, a twisting force in the direction of closing the club face F is applied to the shaft 11 in a swinging process till 45°right before the impact. When the player swings the fin in the hook groove 22 in stead of the slice groove, the twisting force in the direction of opening the club face is applied to the shaft in the similar process. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
