Racket frame structure made of aluminum alloy

Abstract

A racket frame structure includes a main body having an inner side wall and an outer side wall. The inner side wall of the main body having two sides each formed with a plurality of reinforcement ribs. The reinforcement ribs are located at connections of the main strings and the cross strings on the main body. Thus, the main body at the connections of the main strings and the cross strings is strengthened by the reinforcement ribs so as to enhance the strength of the main body, thereby preventing the main body of the frame from being deformed, distorted or broken at the connections of the main strings and the cross strings due to a larger striking force.

1 . A racket frame structure, comprising: 
 a main body having an inner side wall and an outer side wall;    the inner side wall of the main body having two opposite sides each formed with a plurality of reinforcement ribs arranged in a symmetric manner;    a plurality of main strings and a plurality of cross strings mounted in the main body to form a racket face, wherein the reinforcement ribs are located at connections of the main strings and the cross strings on the main body.    
   
   
       2 . The racket frame structure in accordance with  claim 1 , wherein the main body is made of an aluminum alloy.  
   
   
       3 . (canceled)  
   
   
       4 . The racket frame structure in accordance with  claim 1 , wherein the main body is formed with a plurality of string holes each extended through the inner side wall and the outer side wall of the main body, and each located between the reinforcement ribs at the two opposite sides of the inner side wall of the main body.  
   
   
       5 . The racket frame structure in accordance with  claim 1 , wherein each of the reinforcement ribs is formed by a punching process.  
   
   
       6 . The racket frame structure in accordance with  claim 1 , wherein each of the reinforcement ribs is formed by a rolling process.  
   
   
       7 . The racket frame structure in accordance with  claim 1 , wherein each of the reinforcement ribs is recessed.  
   
   
       8 . The racket frame structure in accordance with  claim 7 , wherein each of the reinforcement ribs has an elongated recess extended through a determined length of the inner side wall of the main body and having a mediate portion and two distal ends, and the elongated recess of each of the reinforcement ribs has a depth gradually increased from each of the two distal ends to the mediate portion thereof.  
   
   
       9 . The racket frame structure in accordance with  claim 8 , wherein the main body has different cross sections by provision of the reinforcement ribs so that the different cross sections of the main body have different thickness.  
   
   
       10 . The racket frame structure in accordance with  claim 7 , wherein each of the reinforcement ribs has a constant depth.  
   
   
       11 . The racket frame structure in accordance with  claim 1 , wherein each of the reinforcement ribs is protruding outward.