Golf club shaft

摘要

A shaft 6 includes full length layers provided wholly in a longitudinal direction of the shaft, and a tip end partial layer provided on a tip part of the shaft. The full length layers include a bias layer and a straight layer. The tip end partial layer includes an inner glass fiber reinforced layer. When a full length of the shaft is defined as Ls, and a distance between a tip end of the shaft and a center of gravity G of the shaft is defined as Lg, a ratio (Lg/Ls) is equal to or greater than 0.52 and equal to or less than 0.65. A weight of the shaft is equal to or less than 65 g. Preferably, the inner glass fiber reinforced layer is positioned inside the bias layer.

主权项

1. A golf club shaft comprising:
full length layers disposed wholly in a longitudinal direction of the shaft; a tip end partial layer disposed on a tip part of the shaft; and a hoop layer that includes a middle partial hoop layer; wherein the full length layers include a bias layer and a straight layer; the tip end partial layer includes an inner glass fiber reinforced layer; when a full length of the shaft is defined as Ls and a distance between a tip end of the shaft and a center of gravity G of the shaft is defined as Lg, a ratio (Lg/Ls) is 0.52 or greater and 0.65 or less and the full length Ls of the shaft is equal to or greater than 44 inches; a weight of the shaft is equal to or less than 65 g; wherein the shaft is equally divided into three in the longitudinal direction to section the shaft into a tip region, a middle region, and a butt region; if a weight of the hoop layer in the tip region is defined as Rf1, a weight of the hoop layer in the middle region is defined as Rf2, and a weight of the hoop layer in the butt region is defined as Rf3, the weight Rf2 is greater than the weight Rf1, and the weight Rf2 is greater than the weight Rf3; if a length of the middle partial hoop layer in the longitudinal direction is defined as Lz, Lz/Ls is equal to or greater than 0.45; and wherein the bias layer and the straight layer as the full length layers are formed of carbon fiber reinforcing prepregs.