| 摘要 |
PROBLEM TO BE SOLVED: To provide a tennis racket which is easy to handle and has excellent ball repulsion performance. SOLUTION: The tennis racket 1 has a head part 3, two throat parts 5, a shaft part 7 and a grip part 9. The head part 3 and the throat parts 5 form a frame part 11. The portion of the head part 3 held by the two throat parts 5 and 5 is a yoke part 13. The value (M1) obtained by multiplying the weight (M) and balance (1) of the tennis racket is below 8500 g.cm. The ratio (Gh/Gs) of the intra-surface direction rigidity value (Gh) in the side parts 17a and 17b of the head part 3 of the tennis racket 1 and the out-of-surface direction rigidity value (Gs) in the throat parts 5 is below 0.2. |
