Study On Ankle Flexion Movement Morphology And Elastic Ankle Pressure Pads

The external shape of the ankle changes during human movement,especially during extension and flexion,which leads to uneven pressure distribution in the elastic ankle brace.This study combines 3D scanning,surface reconstruction,garment pressure and other techniques and theories to obtain a digital model of ankle movement and pressure distribution,and propose a pressure transfer method to complete the design of the elastic ankle.The main tasks completed are as follows:(1)The research results on human motion,clothing pressure,3D scanning and ankle protection products were sorted out.(2)Completed the collection of ankle motion data and reconstruction of the digital model.Combining the limit angles of ankle dorsiflexion and plantarflexion,the ankle extension and flexion movements were divided into 14 angles of decomposed movements.Healthy adults of average size were selected as subjects,and the point cloud data of ankle movement morphology of corresponding angles were acquired by 3D scanning technology,and the digital model of ankle extension and flexion movement morphology with constant local features was constructed by using NURBS curve surface interpolation technology.(3)The pressure distribution of the elastic brace under the change of ankle extension and flexion motion pattern was summarised.The pressure distribution of the ankle joint was calculated using the Grasshopper plug-in,and it was found that the extreme values of the pressure were mainly distributed in the tibial and Achilles tendons.The maximum pressure was found to be in the anterior tibial tendon and the Achilles tendon,with the maximum pressure occurring at 20°of dorsiflexion and 35° of plantarflexion respectively.(4)The design and comfort evaluation of the adjustable pressure elastic ankle brace was completed.The design of the adjustable pressure elastic ankle brace is based on the specific pressure distribution in ankle extension and flexion movements,and the pressure transfer method is proposed to solve the problem of uneven pressure distribution in the elastic ankle brace and improve the pressure comfort of the user.