| 摘要 |
A seat support assembly includes a base, a plurality of arms each mounted at a first end to the base for movement with respect to the base, and mounted to a seat at a second end opposite the first end for movement with respect to the seat. A torsion spring has a first end defining a length, a second end defining a length, and a coil defining an axis. A first bearing surface abuts the first end of the torsion spring at a first abutment point to define a first moment arm distance. A second bearing surface abuts the second end of the torsion spring at a second abutment point to define a second moment arm distance. An adjustment mechanism simultaneously causes relative movement between the torsion spring and the bearing surfaces to simultaneously change the first moment arm distance and the second moment arm distance.
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