| 摘要 |
<p>A compact and lightweight knee joint for a prosthetic leg that can be locked or released with low operating forces comprises upper and lower members interconnected by a pin at a posterior location. A latch pivoted to one of the members for rotation about a vertical axis releasably locks into a recess in the other member to hold the joint in its extended position. The upper member has depending cheeks between which a head of the lower member is received. Adjoining horizontal faces of the upper and lower members are planar and a pad of elastomeric material attached to one of the planar surfaces serves as an extension stop buffer. The latch is blade-like and of bell-crank shape. It fits into slots in the anterior edge of each cheek and is pivoted in one of the slots with an anterior lever thereof spanning between the slots and with a latch head thereof fitting into the other slot. A cable release is fitted to the medial/lateral lever for release of the latch. The cable passes through a bore in the pin and an internal spring urges the latch towards its locking position.</p> |
