| 摘要 |
A knee cutting instrument apparatus includes an elongated alignment rod that can enable a surgeon to define alignment with a patient's long bone. An instrument block body can slide upon the alignment rod between its end portions. A locking member forms a connection with the rod at a selected position along the rod. The locking member includes a cam locking arrangement that rotates about a pivot on the instrument body. The cam has a handle portion or arm that enables a user to rotate the cam and its locking tab about its pivot. Part of the locking cam includes a locking tab having a slot that extends circumferentially about ninety degrees (90 DEG ) around the pivot of the cam. The slot is positioned radially in between the pivot and the periphery of the locking member at a locking member bearing surface. The slot provides a closed end portion and an open end portion that communicates with the locking member periphery at a positioned spaced away from the bearing surface. The slot is preferably sufficient long enough that it extends circumferentially the full length of the bearing surface. |
