Prosthetic leg with knee braking function

Abstract

A prosthetic leg with a flexible knee brake that mechanically detects where the load of the person wearing the leg is applied to the foot. In the thigh artificial leg (10), the joint upper part (12) comprising the bracket (120) and the joint lower part (14) comprising the frame (140) and the seat bracket (22) integrated with the frame (140) ) to bend the knee. On the housing part (24), in addition to the knee shaft, a hydraulic brake circuit is also formed. A link mechanism (50) is provided between the housing part (24) and the seat holder (22) on the side of the body part in order to perform relatively small movements. The linkage (50) has an instantaneous center between the toe and the heel of the foot of the prosthetic leg. The momentary center becomes a sensing point, and it is detected that the load of the person wearing the prosthetic leg acts on the heel of the foot and that the load acts on the toe, respectively. The hydraulic braking circuit is controlled according to the detected result of the link mechanism (50), so as to realize flexible knee braking.

Description

technical field [0001] The present invention relates to a prosthetic leg comprising a knee joint capable of flexing the knee and flexibly immobilizing the bending of the knee, i.e. a prosthetic leg involving yielding, in particular to a prosthetic leg which is mechanically The link mechanism constitutes the prosthetic leg of the sensing part for detecting where the load of the person wearing the prosthetic leg acts on the foot attached to the prosthetic leg. Background technique [0002] For people with prosthetic legs, it is a basic desire to walk as naturally as normal people. In particular, it is a dream to step down steps or go downhill smoothly with the left and right legs alternately. In order to realize the latter wish, a flexible knee braking function, that is, a yielding function, is required. Utilizing this yielding function, when body weight is applied to the prosthetic leg including the knee joint, the knee joint gradually changes the bending angle. Therefore, ...

AI Technical Summary

Problems solved by technology

[0007] However, the technology utilizing the mechanical method so far is not a technology for detecting the state where the load acts on the foot, so when going down a step or downhill, when the last toe of the stance phase leaves the ground, The problem of not being able to release the braking force properly and thus not switch smoothly to the swing phase, because people with prosthetic legs tend to place their center of gravity more rearward in situations such as descending steps or descending slopes , so the ground reaction force will pass through the knee axis fairly far behind

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