| 摘要 |
<p>A seat assembly includes a seat mounted on a support structure so as to be displaceable relative to the support structure between a normal position and a lowered position. An acceleration reducing arrangement, mechanically linking between the seat and the support structure, is configured to attenuate a vertical acceleration pulse experienced by the support structure so as to reduce an acceleration experienced by an occupant of the seat. The acceleration reducing arrangement includes a hydraulic damper having a piston displaceable within a cylinder, and a mechanical linkage deployed so as to define a non-linear relationship between displacement of the seat and displacement of the piston. Preferably, a derivative of piston displacement with respect to seat displacement has a first value at the beginning of motion from the normal position and increases with increasing seat displacement towards the lowered position.</p> |
