A variable stiffness deformation unit and porous orthopedic pad based on origami principle

Abstract

Provided are a variable stiffness deformation unit and porous orthopedic pad based on a paper folding principle. The variable stiffness deformation unit comprises a deformed outer frame and a deformation column therein; the deformed outer frame is provided with a top surface and a bottom surface which are shaped like the Chinese character 'shi', and are symmetrically arranged; the four ends of thetop surface and the bottom surface are respectively connected by vertical plates; each vertical plate is an elastic material, and the middle can be bent inward; the center of the top surface extendsdownwardly to be provided with an upper fixing cover, and the center of the bottom surface extends upwardly to be provided with a lower fixing cover; the deformation column is located between the upper fixing cover and the lower fixing cover, the deformation column is a curling body capable of axially expanding and contracting, and the curling body is filled with a plurality of packing particles.The unit is inspired by the paper folding principle, and the shape of the porous orthopedic pad changes with the change of a human body force by utilizing the shape change and the degree of freedom change of the deformation unit in the direction of a fold.

Description

technical field [0001] The invention belongs to the technical field of rehabilitation and health equipment, in particular to a flexible variable-rigidity deformation unit and a porous orthopedic pad based on the origami principle. Background technique [0002] Orthosis is a general term for external devices assembled on the limbs and trunk of the human body. Its purpose is to prevent or correct deformities of limbs and trunk or to treat bone joint and neuromuscular diseases and compensate their functions. According to different parts of the human body, orthotics can be divided into many types, and for each orthotic, the pad is one of its essential key components. Orthopedic pads are very common in daily life, such as wheelchair seat pads, trunk orthotic inner pads, prosthetic socket silicone sleeves, etc. The main function of the orthopedic pad is to relieve the pressure and reduce the wear of the soft tissue of the human body and the hard structure of the orthosis. In the...

AI Technical Summary

Problems solved by technology

In the past, orthopedic pads were mostly made of sponge, silica gel and other materials. The flexible deformation of the material itself was used to improve comfort and improve the interface properties between the orthotic and the human body. However, these materials often have insufficient air permeability and poor fatigue pressure resistance. , collapse deformation and other issues

At the same time, in the past, the deformation of the liner was forced deformation. The structural deformation direction of the liner itself was not controllable, and the randomness was too strong. Physiological profile

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