| 摘要 |
A tennis racket frame (1) strung with strings (2) under tension has two ends (4, 5) neighboring each other, joined in each instance by a flexible brace (6, 7) to a holding member (3), which ends can be spread apart or drawn together by tensioning means (22, 25, 26) so that the magnitude of the tension can be adjusted. So that relatively high spreading or drawing forces can be applied, the frame (1) has at least one shackle (8) joining the two ends (4, 5) of the frame to each other. Each shackle (8) has two legs in a V-shaped arrangement, joined together angularly movable at their one end and force-locked at their other end to the corresponding end of the frame (1). An adjusting element (22, 25, 26) acts on the shackle ends joined together transversely to the frame (1), so that their included angle is variable on the principle of a toggle.
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