| 摘要 |
A ball batting practice and training device comprised of a frame having a top and a bottom defining a vertical axis between them, and a pair of vertical support elements spaced from the vertical axis and from another. The frame carries a continuous circuit of line comprised of a first section of non-elastic line which slides through the top and the bottom of the frame defining a substantially vertical axis, and which non-elastic line is connected at both of its ends to a section of elastic line. The section of elastic line is connected to one of the vertical support elements to hold it in position. A to-be-batted ball is tethered to the first section of non-elastic line intermediate to the top and bottom of the frame, and may be selectively positioned at various heights along the vertical axis. A second non-elastic line is connected in series between the first vertical support element, the ball, and the second vertical support element. When batted, the ball is propelled a short distance within the framework of the device, causing the elastic portion of the circuit line to initially lengthen. When the energy of the batted ball is dissipated, the elastic portion of the circuit line then contracts, pulling on both ends of the non-elastic line and causing it to become taut, thereby almost immediately stopping and returning the tethered ball to its original position, ready to be batted again.
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