| 摘要 |
An equipoised mechanism for supporting an object has a first set of parallel arms pivotally mounted on a supporting bracket, a first supported bracket pivotally connected to the first set of arms at the ends thereof opposite the supporting bracket, a second set of parallel arms pivotally mounted on the first supported bracket, and a second supported bracket pivotally mounted at the ends of the second set of parallel arms, opposite the first supported bracket, to which a mounting assembly and supported object are attached. The arms and brackets define two parallelograms by which the first and second supported brackets are maintained in a predetermined orientation with respect to the supporting bracket; balance and equalization forces on the mechanism are provided by a pair of springs operably connecting the first set of parallel arms and two sets of parallel springs operably connecting the second set of parallel arms.
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