Back recess balance weight structure for golf club heads

Abstract

A back recess balance weight structure for golf club heads is located on a back side of a golf club head relative to the striking face and includes a back recess body and a sealing cap. The back recess body has a back recess with a plurality of cavities formed therein. The sealing cap covers the back recess by bonding. The structure consists of simple elements. The sealing cap is made from a material of a smaller specific gravity to move the weight of the club head to the optimal position. The adhesive can absorb shock and vibration to form a tight sealing of the sealing cap and the back recess body. Thereby optimal stability and striking accuracy can be achieved during swinging of the golf club.

1 . A back recess balance weight structure for golf club heads being located on a back side of a golf club head relative to a striking face thereof, comprising at least:
 a back recess body which is located on the back side relative to the striking face and has a back recess, the back recess having a plurality of cavities; and   a sealing cap covering the back recess by bonding through an adhesive to couple with the back recess body in an integrated manner.   
   
   
       2 . The back recess balance weight structure of  claim 1 , wherein the back recess is formed in a desired profile and located on a desired location. 
   
   
       3 . The back recess balance weight structure of  claim 1 , wherein the number and location of the cavities are formed as required in the back recess. 
   
   
       4 . The back recess balance weight structure of  claim 1 , wherein the sealing cap is made from a material selected from the group consisting of aluminum, titanium and high strength fibers. 
   
   
       5 . The back recess balance weight structure of  claim 1 , wherein the adhesive is selected from the group consisting of Epoxy resin and EPS blowing granules.