| 摘要 |
A window friction bar assembly (100) comprises first and second link arms (3, 12) which have pivot bores (4,6 14, 16) at each end, and first and second attachment plates (8, 18) for attaching the first and second link arms (3, 12) to a window frame through the pivot bores (6, 16). At least one of the attachment plates (8, 18) constitutes a friction attachment device (20), having a hollow cylindrical protrusion (26) on one side, with an outside diameter to allow a sliding fit inside the pivot bore (6, 16). A screw 30 adapted for screwing into the window frame, has a head formed with a radiused face on an inside, so as to expand an end rim (32) of the hollow cylindrical protrusion (26) when tightened, and thereby provide a frictional attachment between the link arm (3, 12) and the attachment plates (8, 18).
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