| 摘要 |
<p>The present invention relates to a racket having a string part, for tennis, badminton, squash, etc. and, more particularly, to a racket having strings, which outputs a signal to enable a player to exactly swing a racket when at least one swing from among underhand forehand swing, underhand backhand swing, forehand overhead swing, and backhand overhead swing is exactly performed. The racket having strings comprises a swing signal unit, which is switched to output a signal when the racket swung by a player reaches a preset maximum acceleration. Therefore, when an exact swing is performed and a maximum acceleration is thereby reached, the racket having strings outputs a swing signal to enable a player to have an advantage in playing a game. Further, the racket having strings enables a novice at racket sports to acquire exact swing in short time.</p> |
