| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a golf club shaft which is high in the latitude of design and is excellent in durability. <P>SOLUTION: The shaft 6 is made of a prepreg sheet. The sheet of the shaft 6 includes full length sheets a2, a3, a8 and a11 provided wholly in a longitudinal direction of the shaft, and partial sheets a1, a4, a5, a6, a7, a9, a10 and a12 provided partially in the longitudinal direction of the shaft. The number of the full length sheets is equal to or greater than two. The number of the partial sheets is equal to or greater than four. Each of the partial sheets has an end. When four sections obtained by dividing the shaft into four equal parts in the longitudinal direction are set to be first, second, third and fourth sections from a tip end side in order, the total number of ends positioned in the first section is represented as N1, the total number of ends positioned in the second section is represented as N2, the total number of ends positioned in the third section is represented as N3, and the total number of ends positioned in the fourth section is represented as N4, all of N1, N2, N3 and N4 are equal to or greater than one. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
