Motion instant center adjustable type prosthetic multiaxial joint

Abstract

The invention relates to a motion instant center adjustable type prosthetic multiaxial joint and belongs to the technical field of biomedical engineering and rehabilitation assistance. The multiaxial joint comprises a leg connection rod, a rear joint arm, an upper joint body and a front joint arm, wherein every two of the leg connection rod, the rear joint arm, the upper joint body and the front joint arm are hinged to form a quadrilateral structure with a connection rod; the crossed point of the extension lines of the axial lines of the front joint arm and the rear joint arm in a motion plane is a prosthetic motion instant center; the rear joint arm, the upper joint body and the front joint arm are adjustable in length, so that the motion instant centers in different positions can be obtained; and the multiaxial joint is connected with a receiving cavity through the upper joint body and connected with a leg through the leg connection rod. According to the multiaxial joint, other connection rods except for a frame are all enabled to be adjustable in length on the basis of the original multiaxial knee joint, different joint motion instant centers can be obtained by adjusting the rod length, and absolutely stable, cooperatively stable and flexibly controllable prostheses are changed over through centrode transformation.

Description

technical field [0001] The invention relates to a prosthetic multi-axis joint that changes the instantaneous center of movement by adjusting the length of a rod, and belongs to the technical fields of biomedical engineering and rehabilitation aids. Background technique [0002] In the 21st century, prosthetic technology has developed rapidly. With the improvement of quality of life, amputees have higher requirements for lower limb prostheses. People hope that prosthetics can be closer to people's natural legs in terms of appearance and function. The joints (hip, knee, ankle) of the lower limbs of the human body are very complex, and the joints, muscles and tendons cooperate closely to realize the beautiful gait of the human body. Both the knee and ankle are pulley joints. Taking the knee joint as an example, the knee joint is the largest and most complex joint in the human body, consisting of the lower end of the femur, the upper end of the tibia and the patella. The media...

AI Technical Summary

Problems solved by technology

[0004] To sum up, there are great differences in the stability and flexibility of multi-axis joint prostheses currently on the market. Moreover, different prostheses are only suitable for a part of the population. , it may no longer be suitable for the original prosthetics, and the prosthetics need to be constantly replaced during use to adapt to its pathological changes, which undoubtedly increases the financial burden on patients

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