Golf club head

Abstract

Disclosed is a golf club head including a faceplate portion and a main body constituting a remaining part of the golf club head. A plurality of linear protrusions formed parallel to one another on the rear surface (opposing to the front striking surface) of the faceplate portion. The linear protrusions have different lengths and are arranged in an elliptical pattern or a diamond pattern covering the vertical projection of the center-of-gravity of the golf club head on the rear surface of the faceplate portion.

1 . A golf club head comprising: 
 a faceplate portion having a front striking surface for striking a golf ball and a rear surface opposing to the front striking surface;    a top portion forming an upper part of the golf club head;    a sole portion forming a lower part of the golf club head;    a toe portion forming a forepart of the golf club head;    a heel portion forming a rear part of the golf club head;    a hosel portion adapted to be fastened to a shaft; and    a plurality of linear protrusions formed parallel to one another on the rear surface of the faceplate portion and located among the top portion, the sole portion, the toe portion, the heel portion, and the hosel portion,    wherein the linear protrusions have different lengths and are arranged in an elliptical pattern or a diamond pattern covering the vertical projection of the center-of-gravity of the golf club head on the rear surface of the faceplate portion.    
   
   
       2 . The golf club head according to  claim 1 , wherein the geometrical center of the elliptical pattern or the diamond pattern is substantially located at the vertical projection of the center-of-gravity of the golf club head on the rear surface of the faceplate portion.  
   
   
       3 . The golf club head according to  claim 1 , further comprising a plurality of scoring lines extends horizontally on the front striking surface of the faceplate portion, and the linear protrusions extend in a direction parallel to the extending direction of the scoring lines.  
   
   
       4 . The golf club head according to  claim 1 , wherein the linear protrusions have a protruding height in a range of 0.3 to 3 mm and are spaced at intervals in a range of 0.3 to 3 mm.  
   
   
       5 . A golf club head comprising: 
 a faceplate portion having a front striking surface for striking a golf ball and a rear surface opposing to the front striking surface;    a main body constituting a remaining part of the golf club head;    a plurality of scoring lines extends horizontally on the front striking surface of the faceplate portion; and    a plurality of linear protrusions formed parallel to one another on the rear surface of the faceplate portion and extending in a direction parallel to the extending direction of the scoring lines,    wherein the linear protrusions have different lengths and are arranged in an elliptical pattern or a diamond pattern with its geometrical center substantially located at the vertical projection of the center-of-gravity of the golf club head on the rear surface of the faceplate portion.    
   
   
       6 . The golf club head according to  claim 5 , wherein the linear protrusions have a protruding height in a range of 0.3 to 3 mm and are spaced at intervals in a range of 0.3 to 3 mm.