| 摘要 |
PROBLEM TO BE SOLVED: To provide a tennis racket capable of accelerating a swing speed further and hitting a more repulsive and more speedy tennis ball. SOLUTION: This tennis racket is constituted of a frame part 2, a shaft part 3 and a grip part 4. Near the lower end of the frame part 2 of the shaft part 3, a springy part 5 whose thickness is set smaller than the thickness of the other part of the tennis racket is provided. The thickness of the tip 2a of the frame part 2 is set to a maximum thickness and the thickness is gradually reduced from the part of the tip 2a to the springy part 5. Also, the thickness of the lower end 3a of the shaft part 3 is set to the second thickness to the tip 2a of the frame part 2 and the thickness is gradually reduced from the part of the lower end 3a to the springy part 5. |
