| 摘要 |
PROBLEM TO BE SOLVED: To provide a club for verifying whether or not the face is exactly directed to a target when hitting a ball and whether or not the ball is hit at the sweet spot of the face. SOLUTION: The golf club for acquisition of golf swing in tune with a pendulum movement has one or more of dish-shaped depressed portions 2 for mounting a ball having a diameter of 12 to 15 mm at a head rear portion on a line passing through the sweet spot of a putter type golf club head face and intersecting with the face at a right angle and has a structure enabling a swing in a state where the ball is mounted. Alternatively, the club has two dish-shaped depressed portions on which a ball is mounted on the line and has a structure in which a ball can move from the depressed portion to the depressed portion by connecting the two depressed portions by a depressed groove with a concave-shaped cross section. COPYRIGHT: (C)2006,JPO&NCIPI
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