| 摘要 |
An artificial leg has knee stabilisation in the stance phase provided by a hydraulic piston and cylinder assembly (22) for resisting flexion at the knee. The resistance to flexion is controlled according to the axial load applied to the leg by means of a mechanism which allows movement of a knee axis (16) of rotation relative to a main shin component (20), the knee axis (16) being defined by a tubular shaft (14) mounted on a resilient arm (18). Movement of the knee axis (16) is detected by a rocking connector member (40) mounted on a knee chassis, one end of the connector member engaging a trigger element (36T) which remains stationary with the main shin component (20) and the other end engaging a control member (44R) on the piston and cylinder assembly (22) at a position adjacent its connection to the knee chassis. Application of an axial load results in the connector member (40) rocking about a rocking axis to move the control member (44R) which thereby increases resistance to flexion. In an alternative embodiment the resilient arm (18) is replaced by a pivoting link with an integral leaf spring. |
