Artificial foot joint with plantarflexion and dorsiflexion means

摘要

In the present invention, the lower end is the first axis (P1) of the ankle joint axis function, the center portion is the third axis (P3) hinged with the side wall of the piston upper shaft holder (40), and the upper end is a pyramid adapter (15) that is coupled with the prosthesis. ) Having an ankle joint 10; The sole part 20 of the kill material hinged at the first axis P1 and supported to hinge the second axis P2, which is a cylinder rotation axis, to the heel of the foot; The piston upper shaft 34 connected to the upper piston shaft 31a that is integrated with the piston 31 of the cylinder body 32 hinged with the second shaft P2 and wraps the elastic spring 33 on the outer circumferential surface of the piston upper shaft 34, the cylinder body ( 32) a hydraulic cylinder 30 having a piston upper holder 40 hingedly coupled to the piston upper shaft 34 exposed to the top so as to be rotatable and hinged with the third shaft P3; When the ankle joint part 10 is operated in a standing position, as the elastic spring 33 is compressed, the piston upper shaft 34 moves away from the top of the cylinder body 32, and the opening/closing nozzle body 54 is closed to increase hydraulic resistance, The swing stage includes a resistance level control nozzle unit 50 configured to open the opening/closing nozzle body 54 so that the compressed elastic spring 33 and the piston 31 automatically return to the initial state; Interlocking with the pyramid adapter 15, the opening and closing nozzle body 54 closes the flow path by pulling the nozzle body wire 61 in the stance phase, and the opening/closing nozzle body 54 in the swing phase drives to open the flow path, and the pyramid adapter 15 ), and the nozzle body wire 61 is a hydraulic ankle joint device comprising a nozzle opening and closing operation unit 60 having a lever 62 connected.