| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a golf club head provided with a head part of an outer shell structure which reduces a mass of a shaft part and changes a center of gravity position to any position by the shaft part itself moving. <P>SOLUTION: A golf club head is provided with a mechanism which can rotate a mass body 5 in a propeller shape without contacting a crown part 2, a side part 3, and a sole part 4 inside a head part 1. The mass body of the propeller shape has a shaft part 6 and the shaft part 6 links to an outside of the head part 1 through a penetrating groove 8 provided on a rail 7 and joins a handle part 9 operable from outside the head part 1. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
