Golf head

Abstract

A golf head of present invention comprising: A top part makes from light materials with the specific gravity is under 3. The top part provides a neck portion with an axis hole therein for a golf club to plug in. A bottom part mounts under the top part and makes from metals with the specific gravity is over 4. A face part with cup shape has a face and the edge of the face extrudes backward to from a plate potion, the face part mounts in front of the bottom part and the top part and makes from elastic metals like titanium alloy, stainless steel or maraging steel.

1 . A golf head, comprising:
 a top part makes from light materials with the specific gravity is under 3, the top part provides a neck portion with an axis hole therein for a golf club to plug in;   a bottom part mounts under the top part and makes from metals with the specific gravity is over 4;   a face part with cup shape has a face and the edge of the face extrudes backward to from a plate potion, the face part mounts in front of the bottom part and the top part and makes from elastic metals like titanium alloy, stainless steel or maraging steel.   
   
   
       2 . The golf head as claimed in  claim 1 , wherein the top part makes from engineering polymers, carbon fiber reinforce resin, magnesium alloy or aluminum alloy. 
   
   
       3 . The golf head as claimed in  claim 1 , wherein bottom part makes from titanium alloy, stainless steel, normal iron materials, tungsten-nickel alloy by powder metallurgy or tungsten-copper alloy by powder metallurgy. 
   
   
       4 . The golf head as claimed in  claim 1 , wherein a tube plugs in the axis hole of the top part. 
   
   
       5 . The golf head as claimed in  claim 4 , wherein the tube can make form aluminum alloy, magnesium alloy, titanium alloy, stainless steel or engineering polymer. 
   
   
       6 . The golf head as claimed in  claim 1 , wherein there is a fillister and a flange that scarf in coordination on the connecting edge of the top part and the bottom part. 
   
   
       7 . The golf head as claimed in  claim 1 , wherein there is a fillister and a flange that scarf in coordination on the connecting edge of the face part and the top part and the bottom part. 
   
   
       8 . The golf head as claimed in  claim 1 , wherein the distance of the plate portion on the face part from the face to the edge of the plate portion is equal or longer than 8 mm and the thickness of the plate portion is equal or smaller than 2 mm. 
   
   
       9 . The golf head as claimed in  claim 8 , wherein the distance of the plate portion from the face to the edge of the plate portion is longer than 10 mm. 
   
   
       10 . The golf head as claimed in  claim 7 , wherein there is a fillister and a flange on the connecting edge of the top part and the face part and the thickness between the outside surface of the top part and the wall of the fillister is less than 3 mm. 
   
   
       11 . The golf head as claimed in  claim 1 , wherein there is a join portion setting on the bottom part correspondingly the neck portion of the top part and a bolt can plug through a passing hole that locates in the bottom of the axis hole in advance and screws to a hole with threads on the join portion.