Golf club head

Abstract

A golf club head includes a head body having an opening and a connection portion around the opening; and a cup face including a main board having a bending portion toward the head body on at least one edge of the main board, wherein a joint surface is formed on an edge of the bending portion to be combined with the connection portion of the head body; and a board structure stacked with the main board, wherein the material of the board structure is different from the material of the main board, and an explosion welding layer is formed between the board structure and the main board. Because of the design of the bending portion of the cup face, the welded areas of the cup face and head body are far away from the explosion welding layer to prevent the separation of the board structure and the main board.

1 . A golf club head, comprising:
 a head body having an opening on a front part of the head body, and a connection portion around the opening; and   a cup face, comprising:
 a main board having a bending portion toward the head body on at least one edge of the main board, wherein a joint surface is formed on an edge of the bending portion to be combined with the connection portion of the head body; and 
 a board structure stacked with the main board, wherein the material of the board structure is different from the material of the main board. 
   
   
   
       2 . The golf club head according to  claim 1 , wherein an explosion welding layer is formed between the board structure and the main board. 
   
   
       3 . The golf club head according to  claim 1 , wherein the board structure is a substrate or a composite plate comprising at least two different substrates. 
   
   
       4 . The golf club head according to  claim 3 , wherein the composite plate is formed by means of explosion welding. 
   
   
       5 . The golf club head according to  claim 1 , wherein the main board has an outer surface and an inner surface toward the head body, and the board structure is stacked on the center of the inner surface and the size of the board structure is smaller than the size of the main board. 
   
   
       6 . The golf club head according to  claim 1 , wherein the main board has an outer surface and an inner surface toward the head body, and the board structure covers the outer surface. 
   
   
       7 . The golf club head according to  claim 1 , wherein the bending portion is C-shaped and formed on the three edges of the main board. 
   
   
       8 . The golf club head according to  claim 1 , wherein the bending portion is formed on the two opposite edges of the main board. 
   
   
       9 . The golf club head according to  claim 1 , wherein the bending portion is formed on the top edge of the main board. 
   
   
       10 . The golf club head according to  claim 1 , wherein the joint surface and the connection portion are combined by means of welding, gluing or inserting. 
   
   
       11 . The golf club head according to  claim 1 , wherein the cup face is formed by press forging. 
   
   
       12 . The golf club head according to  claim 1 , wherein the material of the head body is stainless steel. 
   
   
       13 . The golf club head according to  claim 1 , wherein the materials of the main board and the board structure are selected from two materials or over two materials of steel, titanium, titanium alloy, copper, aluminum and magnesium.