Golf club

Abstract

There is provided a golf club in which the repulsion area of a face portion is enlarged. The same face in each component of the crown portion, sole portion and the like in the body portion is welded to the face portion having a strike surface by combining metal plates having different rigidity or strength. For example, the face portion on the crown portion or the sole portion is formed of a titan alloy having high rigidity or strength, and other components are formed of pure titan. By disposing such metal plates having different rigidity or strength in one component in this manner, the repulsion area on the face portion can be enlarged, and the traveling distance obtained by hitting a ball can be increased.

1 . A golf club, comprising:
 a face portion disposed at a metallic hollow golf club head and having a striking surface for striking a golf ball; and   a body portion constituting a remaining part thereof, the body portion comprising:   a sole portion forming a lower portion of the metallic hollow golf club head;   a crown portion forming an upper portion of the metallic hollow golf club head;   a toe portion forming a forepart of the metallic hollow golf club head;   a heel portion forming a rear part of the metallic hollow golf club head;   a back portion positioned opposite the face portion and forming a back part of the metallic hollow golf club head; and   a hosel portion to which a shaft is connected,   wherein at least one portion of the above portions in the body portion is formed by joining a plurality of different types of metals having different rigidity or strength on the face portion;   wherein the metals are formed into four metal plates, and the joining is performed by welding;   wherein in the crown portion or the sole portion, the first metal plate is disposed on the face portion side, the second metal plate is disposed on the back portion side, the third metal plate is disposed on the toe portion side and the fourth metal plate is disposed on the heel portion side.   
   
   
       2 . A golf club, comprising:
 a face portion disposed at a metallic hollow golf club head and having a striking surface for striking a golf ball; and   a body portion constituting a remaining part thereof, the body portion comprising:   a sole portion forming a lower portion of the metallic hollow golf club head;   a crown portion forming an upper portion of the metallic hollow golf club head;   a toe portion forming a forepart of the metallic hollow golf club head;   a heel portion forming a rear part of the metallic hollow golf club head;   a back portion positioned opposite the face portion and forming a back part of the metallic hollow golf club head; and   a hosel portion to which a shaft is connected,   wherein at least one portion of the above portions in the body portion is formed by joining a plurality of different types of metals having different rigidity or strength on the face portion;   wherein the metals are formed into three metal plates, and the joining is performed by welding;   wherein in the crown portion or the sole portion, the first metal plate is disposed from the face portion side to the back portion side, the second metal plate is disposed on the toe portion side and the third metal plate is disposed on the heel portion side.   
   
   
       3 . The golf club according to  claim 1  or  2 , wherein the body portion is obtained by welding a sole member having one of the toe portion, the heel portion, and the back portion; a crown member having one of the toe portion, the heel portion, and the back portion; and a hosel member. 
   
   
       4 . The golf club according to  claim 1 , wherein the first metal plate is a metal plate having high rigidity or strength. 
   
   
       5 . The golf club according to  claim 1 , wherein the first metal plate and the second metal plate are metal plates having high rigidity or strength, and are welded to the face portion and the back portion, respectively. 
   
   
       6 . The golf club according to  claim 4  or  5 , wherein the metal plates having high rigidity or strength are made of a titanium alloy, and the other metal plates are made of pure titanium. 
   
   
       7 . The golf club according to any of  claims 1 ,  2  or  4 , wherein the metal plates having different rigidity or strength are welded by combining with a metal plate having a different size of plate thickness. 
   
   
       8 . The golf club according to  claim 3 , wherein the metal plates having different rigidity or strength are welded by combining with a metal plate having a different size of plate thickness.