| 摘要 |
The invention provides a seat 15 with a seat portion 47 for supporting an occupants buttocks and an elevating legrest 22 having a generally planar support portion 48 arranged to support the legs of the occupant in the region of the occupants calves. A linkage mechanism 26 connecting the legrest 22 to the seat portion 47, wherein the linkage mechanism 26 is arranged to support the legrest 22 and rotate the legrest about a rotation axis 31 when the legrest 22 is raised to control the inclination of the legrest 22, the rotation axis 31 being parallel to an axis 11 passing through an occupants knees, about which the occupants lower legs 12 rotate when their lower legs 12 are raised by the legrest 22, wherein the linkage mechanism 26 is arranged such that the legrest rotation axis 31 is displaced relative to the seat portion 47 as the legrest 22 is raised and the support portion 47 is rotated about the legrest rotation axis 31 as the legrest 22 is raised so that the support portion 47 generally follows the inclination of the back of the occupants lower legs 12 in the region of their calves. The invention thus provides a linkage mechanism which can be arranged to keep a support portion of the legrest against the back of the occupants lower legs as the legrest is raised, by moving the axis about which the legrest rotates so that the support portion of the legrest can be both correctly positioned and correctly inclined in all positions of the legrest, from fully lowered to fully raised. This may enable the support portion of the legrest to be retained in contact along its length with the occupants lower leg, avoiding any pressure points occurring as the legrest is raised or lowered. <Figure 6> |
