Bionic passive multi-degree-of-freedom ankle joint prosthesis

Abstract

The bionic passive multi-degree-of-freedom ankle joint artificial limb comprises an ankle upper movable seat, an ankle lower movable seat, an elastic wrapping body foot plate connecting seat and a foot plate assembly, the top of the ankle upper movable seat is provided with a foot top connecting component, and the bottom of the ankle upper movable seat is provided with an inner glenoid fossa, an outer glenoid fossa and intercondylar An inner joint head, an outer joint head and an intercondylar fossa are arranged at the top of the ankle lower movable seat; the elastic wrapping body is used for driving the two to relatively reset and keep a neutral position state. Compared with the prior art, the bionic passive multi-degree-of-freedom ankle joint artificial limb has the advantages that the double-joint head and the double-joint fossa rotate in an arc-shaped surface matching manner, so that multi-dimensional compound movement between the ankle upper movable seat and the ankle lower movable seat in three-surface directions is realized, and the movement flexibility is good; the outer sides of the ankle upper movable seat and the ankle lower movable seat can be automatically reset through the elastic wrapping body when external force is eliminated, the motion characteristics of the ankle joint of the human body are well simulated, and the use effect is good.

Description

technical field [0001] The invention belongs to the technical field of human prostheses, in particular to a bionic passive multi-degree-of-freedom ankle joint prosthesis. Background technique [0002] The reason why human feet can perform relatively complex movements and adapt to different complex road surfaces is mainly because many foot joints are hinged and cooperate with each other to support the daily activities of the human body. Among them, the role of the ankle joint is particularly important. As the main joint of the human foot, the movement of the ankle joint is mainly a compound movement in three planes (sagittal plane, horizontal plane and coronal plane). The researchers found through measurements that the orientation of the joint axis changes in real time during the movement, and this process includes changes in the angle and displacement parameters. Therefore, the compound movement of the ankle joint should also include two ways of rotation and translation. . ...

AI Technical Summary

Problems solved by technology

However, the existing multi-free ankle joint prosthesis does not have good flexibility due to the combination of multiple unidirectional movements into multi-dimensional compound movements, and cannot provide amputees with a more suitable joint flexibility and flexibility characteristics. Multi-dimensional compound exercise, the effect is not ideal

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