Invention Grant
US09399159B2 Shaft for golf clubs 有权
高尔夫球杆

Shaft for golf clubs
Abstract:
A shaft 6 includes a plurality of fiber reinforced resin layers s1 to s10. The plurality of layers include a first straight layer s1 in which a 0°-compression strength is the minimum and a second straight layer s9 in which a 0°-compression strength is the maximum. A specific tip part Tx which is a region between a tip end Tp and a position separated by 100 mm from the tip end Tp satisfies the following (a) to (c): (a) the first straight layer forms a innermost layer; (b) the second straight layer is arranged outside a central position in a thickness direction; and (c) when a 0°-compression strength of the first straight layer is defined as Cmin and a 0°-compression strength of the second straight layer is defined as Cmax, a difference (Cmax−Cmin) is equal to or greater than 550 MPa.
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