| 摘要 |
A dust mop frame suited for holding a dusting fabric with a central portion of the fabric extending across the bottom surface of the frame and over opposite edge portions and extending to the top surface includes a plurality of toggle assemblies for retaining the edge portions of the fabric on the top surface. The toggle assemblies are arranged in opposed sets of at least one toggle assembly adjacent each edge portion of the frame. The toggle assemblies comprise a toggle member having a pivot axis, an arm portion projecting generally radially from the axis, a lip portion spaced from an axis projecting from one side of the arm portion and extending parallel to the axis, a curved portion having an arcuate surface disposed around the pivot axis, means mounting the toggle member on the frame for pivotal movement around the axis, a spring mounted on the frame adapted to frictionally engage and slide along the arcuate surface upon movement of the toggle member.
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