Four-bar linkage knee joint with clamp mechanism

Abstract

The invention provides a four-bar linkage knee joint with a clamp mechanism. A knee carriage is provided with a front through hole and a rear through hole. The inner side of the knee carriage is provided with an inner connecting rod connecting a buffer assembly. A joint body is provided with a joint through hole on the front and a compression block on the rear part. Two first links have their upper ends connected on the front through hole of the knee carriage and the lower ends connected on the joint body through hole. Two second links have their upper ends connected on the rear through hole of the knee carriage. A bunch clamp which is equipped on the inner sides of the first links and the second links has the upper end provided with an upper through hole and the front lower end provided with a lower through hole. The upper through hole of the bunch clamp is inserted and connected on the lower ends of the second links through the axis while the lower through hole is correpsonding to the joint body through hole. The bunch clamp has the rear end contacting the compression block. The upper through hole is provided with a gap which is provided with more than one bending segment. The gap extends downwards from the upper through hole to the bottom of the bunch clamp. The gap opening is located between the lower through hole and the rear end of the bunch clamp.

Description

technical field [0001] This creation is a four-link brake knee joint, which uses the weight of the body or the reaction force of the heel of the prosthetic leg to contact the ground to narrow the gap set by the clamp to limit the rotation of the axis, so as to avoid the prosthetic knee joint from suddenly bending when standing or walking easily. cause danger. Background technique [0002] A good prosthetic knee joint can provide different center of gravity support and corresponding cushioning in different gait cycles or standing states. At the same time, the prosthetic knee joint should also be equipped with an appropriate safety structure during walking or bending of the center of gravity change to prevent Dangerous due to sudden bending. [0003] Such as Figure 7 As shown in the figure, when the prosthesis user is standing with the knee joint unbent, the feet can usually support the body weight stably. As the standing time increases, the user needs to adjust to a relaxed...

AI Technical Summary

Problems solved by technology

[0003] like Figure 7 As shown in the figure, when the prosthesis user is standing with the knee joint unbent, the feet can usually support the body weight stably. As the standing time increases, the user needs to adjust to a relaxed standing posture by slightly bending the knee joint or changing the center of gravity. To relieve the pressure on local joints; Figure 8 The conventional four-link prosthetic knee joint shown in the figure can support the weight of the body stably in an unbent standing state, but if the center of gravity is shifted from the healthy limb side to the prosthetic limb side, the knee joint is likely to bend suddenly in a clockwise direction. Dangerous; with this sudden bending situation as Figure 9 and Figure 10 As shown, when the prosthesis user is walking on a flat or downhill road, the heel of the prosthesis will touch the ground, and an upward force will be generated from the sole of the foot. At this time, if the center of gravity is turned to the side of the prosthesis, it is easy to make the knee joint bend suddenly in a clockwise direction, resulting in a fall Dangerous, so there is still room for further improvement of the conventional four-link prosthetic knee joint

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