Shock absorber for racket

Abstract

A shock absorber or a racket contains: a body and at least two magnetic elements. The body is mounted on strings of the racket and includes an accommodation groove defined therein, the at least two magnetic elements are housed in the accommodation groove of the body, wherein one of the at least two magnetic elements slides in the accommodation groove of the body, and the at least two magnetic elements are fixed at a same magnetic pole and face to each other so that magnetic repulsion produces between the at least two magnetic elements.

What is claimed is: 
     
         1 . A shock absorber or a racket comprising:
 a body mounted on strings of a racket and including an accommodation groove defined therein;   at least two magnetic elements housed in the accommodation groove of the body, wherein one of the at least two magnetic elements slides in the accommodation groove of the body, and the at least two magnetic elements are fixed at a same magnetic pole and face to each other so that magnetic repulsion produces between the at least two magnetic elements.   
     
     
         2 . The shock absorber or the racket as claimed in  claim 1 , wherein the body is made of flexible material and also includes a vibration absorbing block and a locking slot formed on the vibration absorbing block so as to retain strings of the racket. 
     
     
         3 . The shock absorber or the racket as claimed in  claim 1 , wherein the body is tubular and includes a first absorbing block and a second absorbing block which are fitted on the body and are made of flexible material, wherein the first absorbing block has a first locking slot defined thereon, and the second absorbing block has a second locking slot defined thereon, such that the first locking slot and the second locking slot retain the strings of the racket. 
     
     
         4 . The shock absorber or the racket as claimed in  claim 1 , wherein a first magnetic element and a second magnetic element are housed in the accommodation groove of the body, and the first magnetic element slides in the accommodation groove of the body, the second magnetic element is fixed on a first end of the accommodation groove of the body and faces to the first magnetic element on a second end of the accommodation groove, hence the magnetic repulsion produces between the first magnetic element and the second magnetic element. 
     
     
         5 . The shock absorber or the racket as claimed in  claim 4 , wherein the accommodation groove of the body has two annular tabs disposed therein so as to limit the second magnetic element on the first end of the accommodation groove of the body; the accommodation groove of the body further has a stop portion formed on the second end thereof so as to stop a removal of the first magnetic element from the accommodation groove of the body. 
     
     
         6 . The shock absorber or the racket as claimed in  claim 4 , wherein the accommodation groove of the body further has a steel ball housed therein so that the first magnetic element magnetically attracts the steel ball. 
     
     
         7 . The shock absorber or the racket as claimed in  claim 1 , wherein a first magnetic element and a second magnetic element are housed and slide in the accommodation groove of the body, the second magnetic element is fixed on a first end of the accommodation groove of the body and faces to the first magnetic element on a second end of the accommodation groove, hence the magnetic repulsion produces between the first magnetic element and the second magnetic element. 
     
     
         8 . The shock absorber or the racket as claimed in  claim 7 , wherein the accommodation groove has an annular tab disposed therein so as to limit the second magnetic element on the first end of the accommodation groove of the body, and the accommodation groove of the body further has a stop portion formed on the second end thereof so as to stop a removal of the first magnetic element from the accommodation groove of the body. 
     
     
         9 . The shock absorber or the racket as claimed in  claim 7 , wherein the accommodation groove of the body further has a first steel ball and a second steel ball which are housed therein so that the first magnetic element magnetically attracts the first steel ball, and the second magnetic element magnetically attracts the second steel ball. 
     
     
         10 . The shock absorber or the racket as claimed in  claim 1 , wherein each of the first magnetic element and the second magnetic element is annular.