| 摘要 |
Invention herewith described suggests a solution of a stand with a tennis ball on an elastic band has a novelty in that it consists of a base (1), an external pipe (2), an internal pipe (10), links (3) and (4), elastic band (5), a tennis ball (6) and hooks (7) and (8) to the elastic band (5). On a flat ground is positioned the stand by the base (1), made of steel U profiles. On the stand (1) is welded one external pipe (2) wherein the internal pipe (10) can move up and down and by means of a screw (9), it can be secured. On the top of the inside pipe (10) there is the link (3) whereto suspends the link (4) whereto secured is the elastic band (5) at the opposite end of which there is a ball (6) secured. The elastic band (5) is wound around the hooks (7) and (8). When the rackets hit the ball (6), the elastic band extends and when getting narrowed it gives the ball (6) back to the player.
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