Golf Club Head

Abstract

Disclosed is a golf club head including a variation part, which is easily flexible, formed at a striking surface of a head, and capable of increasing repulsive power caused by an elastic deformation rate of the striking surface upon striking a ball to improve a flying distance, and strengthening an elastic recovering force of corner parts formed by the variation part to further enhance stability in a ball-flying direction and a ball spin function.

What is claimed is: 
     
         1 . A golf club head provided with a striking plate having a striking surface configured to contact a ball upon striking the ball, characterized in that:
 the striking surface of the striking plate has a plurality of variation parts formed in a lateral direction and disposed in a longitudinal direction, wherein each of the variation parts has a thickness (t 2 ) smaller than a thickness (t 1 ) of the striking plate, upper and lower sides of the variation part are continuously formed with the striking plate, and a center part of the variation part is concavely recessed from the striking surface to form a groove on the striking surface.   
     
     
         2 . The golf club head according to  claim 1 , wherein the center part of the variation part is recessed in a V or U shape to form corner parts at the upper and lower sides of the variation part. 
     
     
         3 . The golf club head according to  claim 1 , wherein the striking plate disposed between the variation parts has a gravity center extension projecting rearward therefrom. 
     
     
         4 . The golf club head according to  claim 1 , wherein the variation part in the longitudinal direction crossing the variation part in the lateral direction is laterally disposed in plural. 
     
     
         5 . The golf club head according to  claim 1 , wherein the striking plate is constituted by an inner plate and an outer plate coupled to a front surface of the inner plate to form the striking surface and having a thickness smaller than that of the inner plate, the variation part is formed at the outer plate, and the inner plate has a through-hole in which the variation part is positioned and received. 
     
     
         6 . The golf club head according to  claim 5 , wherein the gravity center extension projects rearward from the inner plate disposed between the variation parts. 
     
     
         7 . The golf club head according to  claim 5 , wherein mutual contact parts of the outer plate and the inner plates have an arc-shaped part and an arc-shaped groove, respectively. 
     
     
         8 . The golf club head according to  claim 2 , wherein the striking plate disposed between the variation parts has a gravity center extension projecting rearward therefrom. 
     
     
         9 . The golf club head according to  claim 2 , wherein the variation part in the longitudinal direction crossing the variation part in the lateral direction is laterally disposed in plural. 
     
     
         10 . The golf club head according to  claim 2 , wherein the striking plate is constituted by an inner plate and an outer plate coupled to a front surface of the inner plate to form the striking surface and having a thickness smaller than that of the inner plate, the variation part is formed at the outer plate, and the inner plate has a through-hole in which the variation part is positioned and received. 
     
     
         11 . The golf club head according to  claim 10 , wherein the gravity center extension projects rearward from the inner plate disposed between the variation parts. 
     
     
         12 . The golf club head according to  claim 10 , wherein mutual contact parts of the outer plate and the inner plates have an arc-shaped part and an arc-shaped groove, respectively.