Design of knee joint variable stiffness protector based on lower limb biomechanical characteristics
In order to meet the growing demand for wearable sports protective gear products in the context of national fitness movement and to address the problems of insufficient protective performance and low matching degree of sportswear in existing prefabricated protective gears,a new method was developed to analyze the skin deformation and curvature pressure distribution of the lower limbs during movement.First of all,key technologies and methods such as reverse engineering and clothing pressure calculation theory were employed to collect and qualitatively and quantitatively analyze key parameters like skin deformation and protective gear pressure during movement.This analysis revealed the regional pattern changes in lower limb skin deformation and curvature pressure distribution,leading to the construction of a functional zoning model for human knee joint protective gear.Secondly,the design of knee joint variable stiffness brace partition structure was completed according to different partition regions.The finite element simulation method was then used to construct a finite element model of the knee joint-guard,allowing for the comparative analysis of contact pressure distribution laws under various wearing conditions of multiple groups of guards.Finally,combined with the pressure and electromyography acquisition experiments of the guards,it was verified that the knee variable stiffness guards can optimize the pressure distribution of the knee joint,improve the wearing degree of fit,and enhance the athletic performance.