| 摘要 |
<p>PROBLEM TO BE SOLVED: To make the tension adjustment of vertical and horizontal strings easy and obtain a uniform repulsive force from vertical and horizontal strings by stretching the strings diagonally to the axis of a racket. SOLUTION: Racket strings 1 are stretched diagonally to the axis 2 of a racket. On such occasion, preferably the strings 1 intersecting each other are stretched non-perpendicularly, thereby making the strings 1 intersecting each other nearly equal in length in a wide range near the center of the face and making the tension of the strings 1 comparable, allowing the tension of the strings to be adjusted easily. As a uniform repulsive force is obtained from both strings 1, it is possible to make strong shots. By making both strings 1 intersect each other non-perpendicularly, the range where both strings 1 have the same length expands further, allowing a racket to demonstrate its great power in a game.</p> |
