Golf club head

Abstract

Provided is a head including a striking face forming portion and a rib frame that is constituted by a plurality of extending portions. The rib frame and the striking face forming portion constitute a head structure portion. The head structure portion includes a first shape portion having a shape corresponding to a first constituent face that is arbitrarily selected from a semi-regular polyhedron, and a second shape portion having a shape corresponding to a second constituent face that shares one side with the first constituent face in the semi-regular polyhedron. The first constituent face may be a triangle, a quadrangle, or a pentagon. The semi-regular polyhedron may be an icosidodecahedron, for example. Alternatively, the semi-regular polyhedron may be a cuboctahedron, for example.

What is claimed is: 
     
         1 . A golf club head comprising:
 a striking face forming portion; and   a rib frame that is constituted by a plurality of extending portions, wherein   the rib frame and the striking face forming portion constitute a head structure portion, and   the head structure portion includes:   a first shape portion having a shape corresponding to a first constituent face that is arbitrarily selected from a semi-regular polyhedron; and   at least one second shape portion having a shape corresponding to at least one second constituent face that shares one side with the first constituent face in the semi-regular polyhedron.   
     
     
         2 . The golf club head according to  claim 1 , wherein the first constituent face is a triangle, a quadrangle, or a pentagon. 
     
     
         3 . The golf club head according to  claim 1 , wherein the semi-regular polyhedron is an icosidodecahedron or a cuboctahedron. 
     
     
         4 . A golf club head comprising:
 a striking face forming portion; and   a rib frame that is constituted by at least three extending portions, wherein   the rib frame includes a triangular portion that has a shape corresponding to a triangle.   
     
     
         5 . The golf club head according to  claim 4 , wherein
 the at least three extending portions include three extending portions forming the triangular portion, and   of the three extending portions forming the triangular portion, at least two extending portions extend from the striking face forming portion.   
     
     
         6 . The golf club head according to  claim 4 , wherein
 the at least three extending portions include three extending portions forming the triangular portion, and   the three extending portions forming the triangular portion extend from the striking face forming portion.   
     
     
         7 . The golf club head according to  claim 1 , wherein
 the head includes an outer shell portion and a hollow portion, and   the rib frame is disposed along the outer shell portion.   
     
     
         8 . The golf club head according to  claim 1 , wherein
 the head includes a crown and a sole, and   the rib frame is formed in the crown and the sole.   
     
     
         9 . The golf club head according to  claim 1 , wherein
 the head includes a crown and a sole, and   the rib frame is formed in only one of the crown and the sole.   
     
     
         10 . The golf club head according to  claim 1 , wherein the semi-regular polyhedron is an icosidodecahedron. 
     
     
         11 . The golf club head according to  claim 1 , wherein the number of the at least one second shape portion is two or more. 
     
     
         12 . The golf club head according to  claim 1 , wherein the number of the at least one second shape portion is three or more. 
     
     
         13 . The golf club head according to  claim 1 , wherein
 the number of the at least one second shape portion is a maximum possible number, and   when the first constituent face is an n-sided polygon, the maximum possible number is defined as n.   
     
     
         14 . The golf club head according to  claim 1 , wherein
 the at least one second constituent face comprises at least two second constituent faces,   the head structure portion further includes at least one third shape portion having a shape corresponding to a third constituent face, the third constituent face being a constituent face of the semi-regular polyhedron other than the first constituent face and the second constituent faces and having two sides respectively shared with two second constituent faces adjacent to each other.   
     
     
         15 . The golf club head according to  claim 14 , wherein the number of the at least one third shape portion is two or more. 
     
     
         16 . The golf club head according to  claim 14 , wherein the number of the at least one third shape portion is three or more. 
     
     
         17 . The golf club head according to  claim 7 , wherein the plurality of extending portions of the rib frame are disposed on an inner surface of the outer shell portion.