A separate transverse arch prosthetic foot

Abstract

A separate transverse arch prosthetic foot plate belongs to the technical field of artificial limb manufacturing. The invention provides a prosthetic foot plate designed in combination with the characteristics of the lateral arch of the human foot and the change law of the plantar pressure center in the gait contact cycle. The arch feature is integrated into the previous horizontal and straight carbon fiber foot plate design to improve the stiffness of the prosthetic foot plate and reduce the weight of the prosthetic foot plate; the forefoot part adopts a separate curved plate design, using two simple curved plates with different curvatures to simulate complex The curved surface of the horizontal arch of the human body reduces the manufacturing cost and makes the stiffness distribution of each part of the sole uneven: the outer side of the foot plate is a single-layer forefoot plate with a small curvature, which has low stiffness; the inner side is a superimposed double-layer forefoot plate, and the lower layer Large curvature and high rigidity. Different parts of the foot plate have different curvatures and different thicknesses. This feature can dynamically adapt to the different rigidities required by the changing plantar pressure during the ground contact process, and improve the support propulsion, stability and comfort of the foot plate.

Description

technical field [0001] The invention belongs to the technical field of artificial prosthetics, and in particular relates to a separate variable rigidity prosthetic foot plate which combines the curvature variation characteristics of the lateral arch of the human foot and the variation law of the plantar pressure center. Background technique [0002] Amputation brings burdens to individuals, families, and society, and installing prosthetics to restore the function of independent movement is an effective means to improve the self-care level of amputees and re-participate in social activities. As the only part of the human body in contact with ground support, the foot is an important part of the lower body. The prosthetic foot is a prosthetic component used to compensate the function of the human foot and ankle system, and its performance is directly related to the overall function of the prosthesis. For a long time, the design of the prosthetic foot has been based on the long...

AI Technical Summary

Problems solved by technology

The performance of carbon fiber composite materials has a certain directionality, which leads to the carbon fiber prosthetic foot plate having greater strength in the foot length direction, but weaker in the foot width direction, and the carbon fiber prosthetic foot plate that is horizontally straight and uniform in thickness can be used on different road surfaces. And the dynamic response of different motion states is poor, so that the ground impact force is more transmitted to the residual limb during the period of the foot plate touching the ground and the period of supporting propulsion, so the stability and comfort of the prosthetic foot plate are limited

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