| 摘要 |
Apparatus for practicing a wide range of sports is disclosed, and comprises a frame with an upstanding support standard from which a support arm projects. A rotatable hub is mounted on the support arm, and a vertically depending suspension rod depends from the hub. An extensible set of telescopically nested cylinders is mounted horizontally at the lower end of the suspension rod. An extensible central rod within the cylinders supports a target object on a presentation stalk. The target object can simulate any kind of ball or other sports object normally hit, caught or otherwise contacted in normal play. In an electromechanical embodiment, a motor engaged through gears to the suspension rod permits the nested cylinders, and thus the target object, to be raised or lowered. A motor within the outermost nested cylinder engaged through gears, a pulley and cable to the central rod permits the central rod to be rapidly retracted, along with all intermediate cylinders into the outermost cylinder. A clutch permits the pulley to be disengaged from the motor so that the central rod and its cable may be pulled out freely. A performance monitoring embodiment includes motion and position sensors associated with the target object, a video monitor mounted on a standard upstanding from the frame, and a control box to which both the sensors and the video monitor are connected.
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