Golf club grip

Abstract

A golf club grip having a double construction includes a cylindrical inside layer part made of a first rubber having a first hardness, and a cylindrical outside layer part made of a second rubber having a second hardness lower than the first hardness, which part covers the cylindrical inside layer part. The cylindrical inside layer part has a length 1 to 4 cm longer than the length of a half of the entire length of the grip. The cylindrical inside layer part is provided with a plurality of longitudinal projecting strips formed on the outer peripheral surface thereof, and the plurality of longitudinal projecting strips extend from the proximal end side of the cylindrical inside layer part to a portion of 70 to 80% of the entire length of the cylindrical inside layer part along the axis line direction of the cylindrical inside layer part, and are formed at fixed intervals in the circumferential direction. The cylindrical outside layer part is provided with a plurality of circumferential grooves, which are formed at fixed intervals in the axis line direction, on the outer peripheral surface of a portion covering a portion of the cylindrical inside layer part in which the longitudinal projecting strips are formed. The cylindrical outside layer part is provided with a plurality of longitudinal grooves formed on the outer peripheral surface on the distal end side of the circumferential grooves.

1 . A golf club grip having a double construction, comprising:
 a cylindrical inside layer part made of a first rubber having a first hardness, the cylindrical inside layer part having a length 1 to 4 cm longer than the length of a half of the entire length of the grip; and   a cylindrical outside layer part made of a second rubber having a second hardness lower than the first hardness, which covers the cylindrical inside layer part,   wherein the cylindrical inside layer part comprises a plurality of longitudinal projecting formed on the outer peripheral surface thereof, the plurality of longitudinal projecting strips extending from the proximal end side of the cylindrical inside layer part to a portion of 70 to 80% of the entire length of the cylindrical inside layer part along the axis line direction of the cylindrical inside layer part, and being formed at fixed intervals in the circumferential direction;   the cylindrical outside layer part comprises plural circumferential grooves, which are formed at fixed intervals in the axis line direction, on the outer peripheral surface of a portion covering a portion of the cylindrical inside layer part in which the longitudinal projecting strips are formed; and   the cylindrical outside layer part comprises a plurality of longitudinal grooves formed on the outer peripheral surface on the distal end side of the circumferential grooves.   
     
     
         2 . The golf club grip according to  claim 1 , wherein as for the wall thicknesses of the cylindrical inside layer part and a portion of the cylindrical outside layer part which covers the cylindrical inside layer part, the cylindrical inside layer part is formed so as to be thicker than the cylindrical outside layer part. 
     
     
         3 . The golf club grip according to  claim 1 , wherein the cylindrical inside layer part is provided with a ring-shaped protrusion extending in the circumferential direction on the distal end side of the area in which the longitudinal projecting strips are formed; and
 the cylindrical outside layer part covers the portion of the cylindrical inside layer part in which the longitudinal projecting strips are formed, and is provided with a first cylindrical outside layer part ranging from the proximal end side of the cylindrical inside layer part to the ring-shaped protrusion and a second cylindrical outside layer part ranging from the ring-shaped protrusion to the grip distal end, which covers the distal end side of the ring-shaped protrusion of the cylindrical inside layer part, and the first cylindrical outside layer part and the second cylindrical outside layer part have different colors.   
     
     
         4 . The golf club grip according to  claim 3 , wherein as for the wall thicknesses of the cylindrical inside layer part and a portion of the cylindrical outside layer part which covers the cylindrical inside layer part, the cylindrical inside layer part is formed so as to be thicker than the cylindrical outside layer part. 
     
     
         5 . The golf club grip according to  claim 3 , wherein the second cylindrical outside layer part constituting the cylindrical outside layer part has a hardness higher than that of the first cylindrical outside layer part. 
     
     
         6 . A golf club grip comprising:
 a cylindrical and rubber inside layer part;   a cylindrical and rubber outside layer part which covers the inside layer part; and   a tungsten sheet having a thickness of 0.2 to 2.0 mm, which is located between the inside layer part and the outside layer part.   
     
     
         7 . The golf club grip according to  claim 6 , wherein the tungsten sheet is formed by molding a mixture of a thermoplastic resin material and tungsten powder, and has a specific gravity of 8 or more. 
     
     
         8 . The golf club grip according to  claim 6 , wherein the inside layer part is formed so as to be 1 to 4 cm longer than the length of a half of the entire length of the grip, and the inside layer part is thicker than the outside layer part. 
     
     
         9 . The golf club grip according to  claim 6 , wherein the tungsten sheet has a width of 5 to 10 mm and a length of 80 to 120 mm. 
     
     
         10 . A golf club grip having a double construction, comprising:
 a cylindrical inside layer part made of a first rubber compound having a first specific gravity; and   a cylindrical outside layer part made of a second rubber compound having a second specific gravity smaller than the first specific gravity, which part covers the inside layer part, wherein   the inside layer part is shorter than the outside layer part.   
     
     
         11 . The golf club grip according to  claim 10 , wherein the inside layer part contains at least one of barium sulfate and metal powder, and the specific gravity thereof is 1.3 to 1.6. 
     
     
         12 . The golf club grip according to  claim 10 , wherein the specific gravity of the outside layer part is 1.0 to 1.15. 
     
     
         13 . The golf club grip according to  claim 10 , wherein the inside layer part has a plurality of longitudinal projecting strips on the outer peripheral surface.