| 摘要 |
A collapsible trolley has a base 12 and a back 14 hinged together with a linkage 38 extending between them. The linkage 38 includes two rods 46, 48 hinged to each other and to the base 12 and back 14 respectively. A central member 40 is connected to or adjacent the hinge of the two rods 46, 48 and extending via a link rod 44 to the hinge of the base 12 and back 14. A strut 52 extends between the central member 40 and the upper rod 46. When the trolley folds, the strut 52 hinges (or alternatively slides on the rod 46) permitting the central member 40 to pivot in a direction opposite to the direction of folding of the trolley. This pivots the link rod 44 and reduces the distance between the hinge of the two rods 46, 48 and the hinge of the base 12 and back 14. The bracing provided by the rods 46, 48 is removed and the trolley folds. Loads are carried over the strut 52 and this biasses the linkage 38 in the unfolded position. <IMAGE>
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