| 摘要 |
A golf club head has an imaginary line defined by the intersection of the striking face (3) with a plane (P) passing through the face centre (O) and which is perpendicular on the one hand to the driving plane (T) and on the other hand to the plane (Q) tangent to the striking face (3) at the face centre (O), the said imaginary line (L) consisting of a succession of portions being arcs of circles, with the two half-lines (L1, L2) on opposite sides of the face centre (O) being asymmetrical with respect to each other, the number of portions being at least three, and the values of the radii of the curvature of adjacent portions being different. <IMAGE> |
