| 主权项 |
1. An apparatus, comprising:
a frame having a first expanded configuration, a second expanded configuration and a collapsed configuration, the frame including a support member, a first elongate member, a second elongate member and a coupling member, the first elongate member having a first end portion and a second end portion opposite the first end portion, the first end portion of the first elongate member being pivotally coupled to the support member, the second elongate member having a first end portion and a second end portion opposite the first end portion, the first end portion of the second elongate member being pivotally coupled to the support member, the coupling member being coupled to the second end portion of the second elongate member and has a first location and a second location different from the first location, the coupling member defining a channel, the second end portion of the first elongate member being coupled to the coupling member at the first location of the coupling member when the frame is in its first expanded configuration, the second end portion of the first elongate member being coupled to the coupling member at the second location of the coupling member when the frame is in its second expanded configuration, at least a portion of the first elongate member being disposed in the channel defined by the coupling member when the frame is in at least one of its first expanded configuration or its second expanded configuration, the second end portion of the first elongate member being separated from the coupling member when the frame is in the collapsed configuration, at least a portion of the second elongate member being disposed in the channel defined by the coupling member when the frame is in the at least one of its first expanded configuration or its second expanded configuration. |
