| 摘要 |
An angularly adjustable rebound apparatus for athletic training. A generally rectangular front frame carries a rebound net and is spring-mounted on a similar back frame. Behind the back frame a rigid support base presents generally triangular opposite sides, each having a horizontal bottom side rail, a front side rail extending up from the front end of the corresponding bottom side rail, and a diagonal side rail extending down from the upper end of the front side rail to the rear end of the bottom side rail. Each bottom side rail has top openings at intervals along its length for receiving a locking pin on a corresponding slider. Each slider carries the socket of a ball-and-socket joint which connects the slider to the rear end of a rigid rod which is pivotally connected at its front end to the lower end of the back frame.
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