| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a golf club configured in such a way that when a golf club 4 is considered as a balancing body, the position of a sweet spot 6 of a head 3 is on a gravity-center line 5 of the balancing body when the golf club 4 is at a stop or/and in rotation by measuring the gravity center line 5 of the balancing body and the sweet spot 6 of the head 3, and adjusting the weight of the golf club 4. <P>SOLUTION: A measuring device shown, for example, in Fig.1 measures whether a vertical line drawn down vertically from a clamp part of the golf club 4 considered as the balancing body passes through the sweet spot 6 of the head 3 while the golf club 4 is clamped at an upper position of a grip 2. When the vertical line does not pass, its deviation quantity and a load corresponding it are calculated, a counter balance etc., is attached to a specified position, and the deviation amount thereof is confirmed again and so on, thereby adjusting the position of the sweet spot 6 of the head 3 onto the gravity-center line 5 of the balancing body when the golf club 4 is at the stop or/and in the rotation. <P>COPYRIGHT: (C)2013,JPO&INPIT |
