| 摘要 |
<p>Apparatus for practicing a wide range of sports comprises a frame (10) with an upstanding support (18) standard. A rotatable hub mounted on a support arm (20), and a vertically depending suspension rod (32) depends from the hub (22). An extensible set of telescopically nested cylinders (38) mounted horizontally at the lower end of the suspension rod (32). An extensible rod (42) within the cylinders supports a target object (58). An electromechanical embodiment, a motor (44) engaged through gears (48) to the suspension rod (42) permits the nested cylinders. A motor (44), within the outermost nested cylinder engaged through gears (48), a pulley (54) and cable (52) to the central rod (42) permits the central rod to be rapidly retracted, along with all intermediate cylinders into the outermost cylinder (40). A clutch (80) 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 includes motion and position sensors target object, a video monitor (74) mounted on a standard upstanding from the frame, and a control box connected to both the sensors and the video monitor.</p> |
