Steel plate bending apparatus

Abstract

The embodiment of the invention discloses a steel plate bending apparatus, which comprises a first handle and a second handle, an ejector block, a first pressurizing block and a second pressurizing block, wherein the first handle and the second handle are hinged together by a handle fixing pin; the ejector block is arranged at one end of the handle fixing pin; the first and second pressurizing blocks are connected with holes positioned above the ejector block by hinged fixing pins; long holes are arranged on the first and second pressurizing blocks and are fixed by pressurizing fixing pins fixed on the first and second handles, and the pressurizing fixing pins can freely slide in the first and second pressurizing blocks; and the contact surfaces of the first and second pressurizing blockswith the steel plate are both planes; and the contact part of the bent ejector block with the steel plate is a convex plane. In the embodiment of the invention, the first and second pressurizing blocks are in surface contact with the steel plate, so that the bending area can be stressed uniformly to the maximum extent so as to disperse bending stress and further decrease the damage to the steel plate.

Description

technical field [0001] The invention relates to the technical field of orthopedic instrument limiting components, and more specifically, relates to a steel plate bending instrument. Background technique [0002] In preparation for or during surgery, it is often necessary to adapt and match implants and other surgical instruments to anatomical conditions. Anatomical conditions may be determined, for example, by the curvature of the bone, the course of the fracture, or the anatomical curvature of the spine. In order to adapt surgical instruments to anatomical conditions, physicians use corresponding instruments, such as curved forceps, when handling them. [0003] The existing steel plate bending pliers mostly adopt the method of three-point bending to bend the steel plate. Such bending pliers have two branch points that are rotatable about a common axis of rotation. The purpose of pressing and bending the steel plate is achieved by the rotation of the two points. For exam...

AI Technical Summary

Problems solved by technology

Another example is the pliers of Synthes, increasing the curvature of the steel plate and reducing the curvature of the steel plate are completed on the same side of the pliers. Although this seems to be simpler in structure, when increasing the curvature of the steel plate, the first and second additions of the pliers The pressure block is in line contact with the steel plate, and the distance between the two pressure points is too close, which leads to bending. It requires a greater contact pressure to bend the steel plate, which increases the damage to the contact point.

The stress concentration and damage of the steel plate at the bending place and the pressurized part will lead to the fracture and deformation of the steel plate after implantation, which will affect the recovery and health of the patient

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