| In order to improve the coupling adaptability between patients with metacarpal finger functional impairment and rehabilitation products,the internal sub-chain configuration data of the metacarpal finger is measured in depth and the external sub-chain design elements are obtained and analyzed,and a coupled bionic design method for metacarpal finger rehabilitation products driven by the internal and external sub-chains of the human hand is proposed.Firstly,we applied anthropometric and medical imaging methods to obtain static data of the internal sub-chain of the metacarpal finger,and extracted typical features and static dimensions of the metacarpal finger;secondly,we used photographic methods to select representative index finger and thumb of the metacarpal finger,and conducted experiments to extract trajectories of the finger movement,and generated fitting curves in Matlab based on the feature points.Then,we analyze the coupling relationship between muscles and bones and joint mobility during the movement of the palm finger in Open Sim software,and obtain the dynamic data of the internal sub-chain of the palm finger;then,we use Kano model to obtain and organize the user requirements of the external sub-chain,summarize and filter the function points,and analyze the design trend of the product,and obtain the design elements of the external sub-chain as a guideline for design practice;finally,we combine the data and analysis of the internal and external sub-chain of the palm finger to Finally,the output of the software and hardware design scheme is carried out,and the simulation of the model thumb and index finger doing finger-to-finger movement is simulated by Adams,and the user satisfaction evaluation is carried out by using Likert scale to verify and evaluate the range of motion of the internal sub-chain and the design elements of the external sub-chain from an objective perspective.The study proposes to use the internal sub-chain configuration constraint as the data reference,the external sub-chain demand characteristics as the design elements,and the simulation and evaluation methods as the validation criteria,and to drive the coupling and adaptation design of palm-finger rehabilitation products through the morphological analysis data of internal and external sub-chains.The design of palm and finger rehabilitation products is driven by the morphological analysis data of internal and external sub-chains. |
