| 摘要 |
A tightenable joint for use in a surgical retractor system includes a monolithic, unitary joint body which has a top leg and a bottom leg. The top leg provides a top compression surface and the bottom leg provides a bottom compression surface operating on a ball. A handled cam is used between proximal ends of the top leg and the bottom leg. When the handle is thrown to tighten the joint, the proximal ends of the top leg and the bottom leg are driven apart by the cam, and a hinge or fulcrum portion on the joint body flexes between top and bottom leg portion such that the top compression surface and bottom compression surface tighten on the ball. The ball has flats that enable the ball to be positioned into the socket, and then an extension is fixed to the ball to prevent removal of the ball from the socket. The cam is defined with an eccentric surface relative to its pivot pin, which is received in an arcuate recess of a bearing plate. When the handle is thrown, the bearing plate slides relative to the joint body under the cam.
|
