| 摘要 |
An expandable frame assembly is provided for supporting and stretching a fabric which includes a plurality of frame portions together defining the periphery of the frame assembly and each having opposed ends and an interior bore extending therethrough, and a plurality of connective expansion members each including first and second extension portions. Each extension portion is slidably mounted within an interior bore of one of the frame portions and has a planar contact surface thereon. An adjustable bearing mechanism is mounted in each end of the plurality of frame portions. Each bearing mechanism has a spherical bearing surface for engaging the planar contact surface of the expansion member proximate thereto to exert a bearing force thereupon. Cladding strips are provided on an outer surface portion of each frame portion for securing a piece of fabric to the frame assembly.
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