Golf club and weight member for golf club

Abstract

A golf club comprises: a pipe-shaped shaft having a space therein and having a first end and a second end; a weight member attached to the shaft on a first end side; and a golf club head attached to the shaft on a second end side. The weight member comprises: a main body portion at least partially disposed in the space of the pipe-shaped shaft; and a flange portion disposed outside the pipe-shaped shaft. The flange portion comprises: a first portion extending in the radial direction of the shaft and having an outer diameter larger than an outer diameter of the shaft at the first end; and a second portion extending in the axial direction of the shaft from the first portion toward the second end so as to cover an outer circumferential surface of the shaft.

1 . A golf club comprising:
 a pipe-shaped shaft having a space therein and having a first end and a second end;   a weight member attached to the shaft on a first end side; and   a golf club head attached to the shaft on a second end side,   
       wherein
 the weight member comprises a main body portion and a flange portion, 
 the main body portion is at least partially disposed in the space of the pipe-shaped shaft, 
 the flange portion is disposed outside the pipe-shaped shaft, and 
 the flange portion comprises 
 
       a first portion extending in the radial direction of the shaft and having an outer diameter larger than an outer diameter of the shaft at the first end, and 
       a second portion extending in the axial direction of the shaft from the first portion toward the second end so as to cover an outer circumferential surface of the shaft. 
     
     
         2 . The golf club according to  claim 1 , wherein
 the second portion includes a plurality of the second portions arranged in the circumferential direction of the shaft at intervals.   
     
     
         3 . The golf club according to  claim 2 , wherein
 the plurality of the second portions are arranged in the circumferential direction of the shaft at equal intervals.   
     
     
         4 . The golf club according to  claim 1 , wherein
 the second portion is annularly-shaped and continuous in the circumferential direction of the shaft.   
     
     
         5 . The golf club according to  claim 1 , wherein
 the second portion is configured so that a gap L 1  in the radial direction of the shaft is formed between the second portion and the outer circumferential surface of the shaft.   
     
     
         6 . The golf club according to  claim 5 , wherein
 the main body portion is configured so that a gap L 2  in the radial direction of the shaft which is larger than the gap L 1  of the second portion, is formed between the main body portion and an inner circumferential surface of the shaft.   
     
     
         7 . The golf club according to  claim 5 , wherein
 the gap L 1  is gradually increased in the axial direction of the shaft toward the second end.   
     
     
         8 . The golf club according to  claim 1 , wherein
 a thickness in the shaft radial direction of the second portion at its end on the first end side is smaller than a thickness in the shaft radial direction of the second portion at is end on the second end side.   
     
     
         9 . The golf club according to  claim 1 , wherein
 the main body portion comprises   
       a third portion separating from the inner circumferential surface of the shaft by a gap in the radial direction of the shaft, and 
       a fourth portion contacting with the inner circumferential surface of the shaft in the radial direction of the shaft,
 the fourth portion is located closer to the second end of the shaft than the third portion, 
 the fourth portion is made of an elastically deformable material, and 
 the fourth portion has an outer diameter larger than an inner diameter of the space of the shaft when the weight member is in its free state. 
 
     
     
         10 . The golf club according to  claim 1 , wherein
 the flange portion is formed as a separate part from the main body portion, and the flange portion is fixed to the main body portion by using a connecting means.   
     
     
         11 . A weight member for a golf club, the golf club comprising a pipe-shaped shaft which has a space therein and a first end and a second end and to which the weight member is attached on the first end side thereof,
 the weight member comprising   
       a main body portion configured so that at least a part thereof can be disposed on the inside of the space of the shaft, and 
       a flange portion configured to be disposed on the outside of the space of the shaft, wherein
 the flange portion comprises 
 
       a first portion extending in a radial direction of the shaft and having an outer diameter larger than an outer diameter of the shaft at the first end, and 
       a second portion extending in an axial direction of the shaft from the first portion toward the second end so as to cover an outer circumferential surface of the shaft. 
     
     
         12 . The weight member according to  claim 11 , wherein
 the second portion includes a plurality of the second portions arranged in the circumferential direction of the shaft at intervals.   
     
     
         13 . The weight member according to  claim 12 , wherein
 the plurality of the second portions are arranged in the circumferential direction of the shaft at equal intervals.   
     
     
         14 . The weight member according to  claim 11 , wherein
 the second portion is continuous in the circumferential direction of the shaft.   
     
     
         15 . A golf club comprising:
 a pipe-shaped shaft having a space therein and having a first end and a second end;   a weight member attached to the shaft on a first end side; and   a golf club head attached to the shaft on a second end side,   
       wherein
 the weight member comprises a main body portion and a flange portion, 
 the main body portion is at least partially disposed in the space of the pipe-shaped shaft, 
 the flange portion is disposed outside the pipe-shaped shaft, and 
 the flange portion comprises 
 
       a first portion extending in the radial direction of the shaft and having an outer diameter larger than an outer diameter of the shaft at the first end, and 
       a second portion extending in the axial direction of the shaft from the first portion toward the second end while being located on the outside in the shaft radial direction of an outer circumferential surface of the shaft. 
     
     
         16 . The golf club according to  claim 15 , wherein
 the second portion includes a plurality of the second portions arranged in the circumferential direction of the shaft at intervals.   
     
     
         17 . The golf club according to  claim 15 , wherein
 the second portion is continuous in the circumferential direction of the shaft.   
     
     
         18 . The golf club according to  claim 15 , wherein
 the second portion is configured so that a gap L 1  in the radial direction of the shaft is formed between the second portion and the outer circumferential surface of the shaft.   
     
     
         19 . The golf club according to  claim 18 , wherein
 the main body portion is configured so that a gap L 2  in the radial direction of the shaft which is larger than the gap L 1  of the second portion, is formed between the main body portion and an inner circumferential surface of the shaft.   
     
     
         20 . The golf club according to  claim 15 , wherein
 the main body portion comprises   
       a third portion separating from the inner circumferential surface of the shaft by a gap in the radial direction of the shaft, and 
       a fourth portion contacting with the inner circumferential surface of the shaft in the radial direction of the shaft,
 the fourth portion is located closer to the second end of the shaft than the third portion, 
 the fourth portion is made of an elastically deformable material, and 
 the fourth portion has an outer diameter larger than an inner diameter of the space of the shaft when the weight member is in its free state.