| 摘要 |
When a rod extending out of the bottom of a hollow rigid plastic trunk encasing a collapsible basketball backboard is pushed up, the backboard comes out of the top of the trunk and opens and a rim rotates 90 degrees to an "up" position perpendicular to the trunk. A pulley system inside the trunk, one end of which is connected to the push rod, controls rotation of a hinge attached to a rim, the hinge sitting in an opening in the top of the trunk. When the rod is pulled, the planar segments of the backboard fold to a point one behind the other and go downward to fit into the trunk and the hoop moves to a "down" position. In open position the backboard segments fan out. The rod has a V-shaped attachment piece connecting the top of the rod to the common bottom border of the backboard.
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