| 摘要 |
Invention herewith described refers to the tennis racket balance device containing the insert (B) for adjusting the balance point of the tennis racket and the counter weight (D) which has the function of neutralizing the insert weight (B) as a prerequisite for fine-adjustment of the equilibrium point of a tennis racket by moving the sliding weight (7) along the outer tubular guide (5). The design of the insert (B) consists of the external and internal tubular guides (5 and 9) connected by the principle of the telescope and attached through the brackets (1, 10), in the frame neck (A) of the tennis racket. The brackets (1 and 10) are by means of flexible wings (4) adapted to the shape of contact area on the frame (A) of the tennis racket.By moving the outer guide (5), in the direction of the arrow (15), there is accomplished a connection or disconnection of the internal guide (9) and the bracket (1) with the purpose of the assembling or partial dismantling of the insert (B) in order to replace the sliding weight (7). By tightening the screw (8) on the sliding weight (7), the sliding weight (7) and the external guide (5) fixing is accomplished at the same time. By tightening the screw (8) also goes through the longitudinal groove (6) in the outer guide (5), and leans against the inner guide (9) whereby the firm connection of the insert (B) components is achieved.
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