| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve the durability of a face part. <P>SOLUTION: In this metallic golf club 1, a head volume is 300 cm<SP>3</SP>or more and the height A of a face surface F for hitting a ball is 45 to 60 mm. A face member forming the face surface F is made from rolled stock formed through rolling work. In a reference state where the club head is placed on a horizontal surface at a regulated lie angle and a loft angle, an angleθon the side of an acute angle formed by rolling direction K in which the face surface F is rolled and a face vertical line N where a vertical plane V at a right angle to the face surface F crosses with the face surface F is not larger than 20°. The center part FC of the face surface F has no face groove extending in a horizontal direction. <P>COPYRIGHT: (C)2003,JPO</p> |
