Golf club shaft and golf club

摘要

A golf club shaft has a tip end to which a golf club head is attached and a butt end to which a grip is attached, wherein the shaft is composed of a fiber reinforced resin having a fiber layer, the fiber layer contains a bias layer having bias fibers oriented at an angle with respect to an axial direction of the shaft, the bias layer includes a tip-side bias layer extending from the tip end toward the butt end and having a butt-side end terminating without reaching the butt end and a butt-side bias layer extending from the butt end toward the tip end and having a tip-side end terminating without reaching the tip end, and bias fibers in the tip-side bias layer has a tensile elastic modulus smaller than that of bias fibers of the butt-side bias layer.

主权项

1. A golf club shaft having a tip end to which a golf club head is attached and a butt end to which a grip is attached, wherein
the shaft is composed of a fiber reinforced resin having a fiber layer, and a straight layer continuous along a shaft total length the fiber layer contains a bias layer having bias fibers oriented at an angle with respect to an axial direction of the shaft, the bias layer includes:
a tip-side bias layer extending from the tip end toward the butt end and having a butt-side end terminating without reaching the butt end, wherein the tip-side bias layer has a length being from 1/10 to 4/10 of the shaft total length, and wherein at least one of said bias fiber in the tip-side bias layer has an angle of from 35 to 55 degrees with respect to the axial direction of the shaft; anda butt-side bias layer extending from the butt end toward the tip end and having a tip-side end terminating without reaching the tip end, wherein at least one of the said bias fiber in the butt-side bias layer has an angle of equal to or greater than 15 degrees with respect to the axial direction of the shaft, each bias fiber in the tip-side bias layer has a tensile elastic modulus smaller than that of bias fibers in the butt-side bias layer, and the butt-side end of the tip-side bias layer and the tip-side end of the butt-side bias layer are provided in a same position in the axial direction of the shaft, or in a position where the tip-side bias layer and the butt-side bias layer overlap each other.