| 摘要 |
<p>The gist of this invention resides in that the providing of parts of a string around on outer edge of a racket frame, i.e. the winding of parts of a string from the outer side around a racket frame having a recess in a certain range of an outer circumference thereof is done so as to provide string surface-forming floating string portions on the same outer circumference. When these floating string portions are tightened with separate string-like member, the tension of the string can be regulated easily and effectively with the string in a tensed state. The present invention is formed by providing in a tensed state parts of a string around an outer edge of a boreless racket frame having an outer circumferential recess. The floating string portions on the outer circumference of the racket frame are further tightened with a tightening member, if necessary, whereby the tension of the string is regulated with the string in a tensed state. String guide adapters are changeable. Therefore, the string mesh design can be changed by utilizing this advantage without changing the racket frame.</p> |
