| 摘要 |
<p>A golf club, namely a driver, includes solid or flowing moving part within t he head such as a pivotable mass (19) held centred by magnet (22) or a fluid e. g. mercury or a ball in an inclined U shaped tube. The mass (19), ball or fluid remains captive at the rear of the head during the downswing on an axis defined by the direction of travel and the centre of mass. A golf ball impacting the head away from this axis e.g. at the toe causes the head to rotate causing the fluid or mass (19) and hence the centre of mass to move t o behind the point of impact i.e. the toe reducing head rotation and increasin g the sweet spot.</p> |
