Golf club shaft

摘要

A shaft 6 is formed by a plurality of prepreg sheets s1, s2, s3, s4, s5, s6, s7, s8 and s9. These prepreg sheets include full length sheets and partial sheets partially provided in the axial direction of the shaft. The full length sheets include a full length hoop sheet s7. The partial sheets include glass fiber reinforced sheets s1, s4. In the shaft 6, a volume ratio Vf of the hoop layer in a specific tip part Tx is equal to or greater than 2.5% and less than 10%. The shaft 6 is lightweight and has a high degree of design freedom of a position of a center of gravity. The shaft 6 is excellent in strength of a tip part.

主权项

1. A golf club shaft comprising a plurality of prepreg sheets, wherein the prepreg sheets include a full length sheet, and a partial sheet partially provided in an axial direction of the shaft;
the full length prepreg sheet comprising a full length hoop sheet and a full length straight sheet, wherein the full length hoop sheet is a carbon fiber reinforced sheet and the full length straight sheet is a carbon fiber reinforced sheet; and the partial prepreg sheet comprising a glass fiber reinforced sheet that is a uni-direction prepreg in which the glass fiber is oriented substantially in one direction, wherein the glass fiber reinforced sheet includes a tip glass fiber part positioned in the specific tip portion; wherein a point separated by 90 mm from a tip end of the shaft is defined as T, with a region between the point T and the tip end of the shaft being defined as a specific tip portion, and wherein a volume ratio Vf of a hoop layer in the specific tip portion is 2.5% or greater and less than 10%.