| 摘要 |
PCT No. PCT/SE91/00240 Sec. 371 Date Oct. 1, 1992 Sec. 102(e) Date Oct. 1, 1992 PCT Filed Mar. 28, 1991 PCT Pub. No. WO91/15170 PCT Pub. Date Oct. 17, 1991.An artificial knee-joint provided with linkage mechanisms, where a thigh part and a lower-leg part are mutually connected by tow base linkage arms, each of which is pivotally connected at respective ends with both the lower-leg part and the thigh part, wherein the pivotal attachment points of the lower-leg part are disposed in moveable attachment elements which mutually coact in a manner such that the knee-joint will automatically either adopt a substantially locked or a moveable position, depending on the direction of the load acting on the knee-joint. The first attachment element is pivotally connected to the two base linkage arms extending from the thigh part and has three pivot points, whereas the second attachment element has two pivot points. The back base linkage arm extending from the thigh part is pivotally connected to both attachment elements. The second attachment element is provided with a lock-stop device which limits movement of the attachment element. When walking, the movement of the attachment elements function to automatically lock the knee-joint and to terminate a walking step in a natural fashion. |
