Golf club shaft and golf club

Abstract

A golf club is formed by winding and hardening a plurality of prepregs. High specific gravity materials having a higher specific gravity than carbon fiber are arranged on the butt side of the golf club. Arrangement of the high specific gravity materials is achieved by winding a high specific gravity material containing prepreg containing carbon fiber and a higher specific gravity material than the carbon fiber. Alternatively, the arrangement of the high specific gravity materials may be achieved by winding another high specific gravity material containing prepreg containing a glass fiber.

What is claimed is: 
     
         1 . A golf club shaft having a tip side and a butt side, comprising:
 a plurality of prepregs being wound and hardened, wherein the plurality of prepregs comprises a high specific gravity material containing prepreg containing carbon fiber and a high specific gravity material having a higher specific gravity than the carbon fiber,   wherein the high specific gravity material is arranged on the butt side of the golf club shaft.   
     
     
         2 . The golf club shaft according to  claim 1 , wherein the high specific gravity material is metallic fiber and arranged in parallel to the carbon fiber in the longitudinal direction of the shaft,
 wherein the elastic modulus of the carbon fiber in the high specific gravity material containing prepreg is higher than the elastic modulus of other carbon fiber in other prepregs of the plurality of prepregs.   
     
     
         3 . The golf club shaft according to  claim 1 , wherein the high specific gravity material is a fiber of high specific gravity material and arranged in a hoop direction of the shaft. 
     
     
         4 . The golf club shaft according to  claim 1 , wherein the high specific gravity material containing prepreg is arranged in a range of 15 to 45% the entire length of a shaft from the butt side thereof. 
     
     
         5 . The golf club shaft according to  claim 1 , wherein the golf club shaft is for a wood club, the total weight of the high specific gravity material is 2 to 6 g. 
     
     
         6 . A golf club comprising the golf club shaft according to  claim 1  and a golf club head. 
     
     
         7 . A golf club shaft having a tip side and a butt side, comprising
 a plurality of prepregs being wound and hardened, wherein the plurality of prepregs comprises at least one high specific gravity material containing prepreg containing a high specific gravity material of glass fiber having a higher specific gravity than carbon fiber,   wherein the high specific gravity material is arranged on the butt side of the golf club shaft.   
     
     
         8 . The golf club shaft according to  claim 7 , wherein the plurality of prepregs comprises the two high specific gravity material containing prepregs, the glass fiber in one of the prepregs is arranged in the longitudinal direction of the shaft, and the glass fiber in another of the prepregs is arranged in the hoop direction of the shaft. 
     
     
         9 . The golf club shaft according to  claim 7 , wherein the glass fiber is arranged only in the hoop direction of the shaft. 
     
     
         10 . The golf club shaft according to  claim 7 , wherein the high specific gravity material containing prepreg is arranged in a range of 15 to 45% the entire length of a shaft from the butt side thereof. 
     
     
         11 . The golf club shaft according to  claim 7 , wherein the golf club shaft is for wood club, the total weight of the glass fiber is 2 to 6 g. 
     
     
         12 . A golf club comprising the golf club shaft according to  claim 7  and a golf club head.