| 摘要 |
An expandable table, comprising a tabletop layer, a guide layer, an actuation layer, a central axis, and a base. The tabletop layer comprises a plurality of segments, each having a pair of segment sides which meet at a segment point. When the tabletop is in the retracted position, all segment sides correspond with segment sides of adjacent segments, and the segment points meet at the central axis of the table. The guide layer comprises a plurality of radial guide slots which equal in number the number of segments. The actuation layer comprises a plurality of arcuate slots which equal the guide slots and which spiral outward from and around the center. A vertical rod extends downward from each of the segments and engages one of the radial guide slots and one of the arcuate actuating slots. The position of each segment is thus at all times defined by the relative position of its associated guide slot and actuating slot. The guide layer and actuation layer are capable of relative rotary motion about the central axis to alter the relative position of the guide slots and actuating slots, and thus cause the segments to move radially inward or radially outward. Once the segments have been moved fully radially outward, leaves may be inserted between the segment sides to create an even, expanded tabletop surface.
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