Free connecting type three-branched chain parallel orthopedic external fixing support

A connected, three-branched technology, used in external fixators, fixators, medical science, etc., can solve the problems of difficult to accurately read and adjust the driving joints, difficult to guarantee accuracy, poor practicability, etc. Accuracy, Interference Avoidance Effect

Active Publication Date: 2018-09-04
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the number of branch chains of this kind of external fixation bracket is small, the three branch chains must be installed symmetrically, and the edge processing of the gear teeth used in the external fixation ring is complicated, the weight is heavy, and the accuracy is difficult to guarantee
In addition, the driving joint is difficult to read and adjust accurately, and the practicability is poor

Method used

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  • Free connecting type three-branched chain parallel orthopedic external fixing support
  • Free connecting type three-branched chain parallel orthopedic external fixing support
  • Free connecting type three-branched chain parallel orthopedic external fixing support

Examples

Experimental program
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Effect test

Embodiment approach

[0024] As the first embodiment of the present invention, such as figure 2As shown, the first active driving mechanism includes a guide rail 201, the two ends of the guide rail are connected with the connecting holes of the proximal fixing ring 1 through bolts and nuts, in the middle of the body of the guide rail 201 and along the guide rail There is a first chute in the length direction, bosses are arranged on both sides of the body of the guide rail 201, and the two ends of a lead screw 203 arranged in the same direction as the first chute are rotatably connected to the connecting holes on the boss. . The lead screw 203 is threadedly connected with the slider 202 . A part of the slider 202 is arranged in the first sliding groove and can slide in the first sliding groove, and the guide rail 201 , the slider 202 and the lead screw 203 together constitute the first moving pair 101 . The first scale line A is arranged on the guide rail 201 1 , a first indicator line A is set ...

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PUM

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Abstract

The invention discloses a free connecting type three-branched chain parallel orthopedic external fixing support, which consists of two fixing rings and three branched chains, wherein the fixing ring is provided with connecting holes which are arranged along the circumferential direction, and the branched chains are provided with two driving moving pairs, a rotating pair and a ball pair. The two fixing rings can be respectively fixedly connected with the bone blocks at both ends of the fracture through metal spicules; the six degrees of freedom relative movement between the fixing rings can begenerated to realize the reduction of fracture according to a certain rule to adjust the driving moving pair of each branched chain. The three branches of the external fixing support can be freely connected between the fixing rings, and the installation is convenient and quick; the number of the branched chains is smaller than that of the general parallel external fixing support, the whole body islight, and the interference to the perspective image is small; the driving pairs of the branched chains can accurately indicate the amount of driving displacement and can lock, reset, and fix the fracture more precisely. According to the external, the external fixing support can effectively improve the clinical application effect of the orthopedic external fixation technology and has important significance.

Description

technical field [0001] The invention relates to the technical field of orthopedic external fixation, in particular to a six-degree-of-freedom parallel external fixation bracket which is composed of three branch chains and two fixation rings and can freely connect the branch chains. Background technique [0002] The orthopedic external fixation bracket percutaneously fixes the fractured end with minimally invasive external fixation pins, which can achieve effective fixation of the fracture site and provide a certain degree of freedom for bone adjustment. At present, orthopedic external fixation brackets and corresponding technologies have been applied in traumatic fracture reduction and deformed bone correction. [0003] The patent US4979348A proposes a parallel external fixation bracket, which is composed of two fixing rings and a plurality of longitudinally parallel threaded rods connected between the fixing rings. The threaded rod passes through the connecting hole of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/62
CPCA61B17/62A61B17/66A61B2090/061A61B90/14A61B2017/00991A61B90/39A61B2090/3937A61B17/88A61B17/90
Inventor 孙涛刘思达宋轶民
Owner TIANJIN UNIV
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