| 摘要 |
One embodiment provides a foldable throwback device comprising a front frame, a base frame, and telescoping angle members. The front frame is adapted to secure a bounce-back surface and is foldable into at least three sections without removal of the bounce-back surface. The base frame is coupled to the front frame by hinge brackets that allow the base frame to fold substantially flat onto the front frame without significant disassembly. Each telescoping angle member extends from the base frame to the front frame, and is adjustable to allow angling the front frame relative to the base frame. Each telescoping angle member may include a rotation-limiting mechanism and a safety mechanism that prevents unintentional detachment.
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