Segmented Orthosis Tensioning Device with Lockable Spools
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Solution Overview
Problem
Existing orthosis tensioning devices lack individual adjustment capabilities, leading to uneven support and potential warping or slipping due to one-sided force distribution, which hampers effective therapy and prophylaxis.
Innovation Solution
A tensioning device featuring pulley blocks with deflection pulleys and lockable spools allows for segment-by-segment adjustment of tension, ensuring stable and symmetrical force application through coaxial mounting and latching elements, preventing unwanted rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a pulley device with a loose tension cable is used to equalize tensile force over the entire width of the orthosis belt, then the tensile force is equalized across the width, but individual adjustment of tension and support effect to specific treatment goals is not possible
Solution Approach 1:
The orthosis belt is divided into multiple tensioning zones with separate pulley devices, each capable of independent adjustment. This segmentation allows different segments of the belt to be tensioned to different levels, enabling individual adjustment of support effect to match specific treatment goals while maintaining overall structural stability
Solution Approach 2:
The pulley devices incorporate adjustable mechanisms that allow dynamic modification of tension forces. The loose tension cable system enables each pulley to be independently adjusted to varying degrees of tightness, providing adaptability for different treatment requirements while the pulley structure itself maintains force equalization within each segment
2Ease of operation
If tightening is performed via one-sided pull ropes in known pulley devices, then the orthosis can be tightened, but one-sided force acts on the orthosis causing warping or slipping
Solution Approach 1:
The pulley devices are positioned asymmetrically or configured with asymmetric cable routing to counterbalance forces. By strategically placing pulleys and routing cables through multiple deflection points, the system generates compensating forces that prevent one-sided loading, thereby eliminating warping and slipping while maintaining ease of tightening operation
Solution Approach 2:
The pulley system acts as an intermediary mechanism that transforms the one-sided pull rope input into multi-directional force distribution. The pulleys and cables redistribute the applied tension force across multiple attachment points on the orthosis, converting a single-point force into a distributed force system that maintains structural stability
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables precise and even force distribution across orthosis segments, preventing slipping and twisting, thus enhancing therapeutic effectiveness and ease of use.
Implementation Method 1
at least one of the at least two pull rope deflections being designed as a deflection pulley
Implementation Method 2
the spool is used for winding and tensioning the at least one traction cable, and the at least one traction cable is rolled up or wound up on the spool
Data Source
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AI summary
The invention relates to a novel tensioning device for orthoses used to support and maintain the functioning of the human body, in particular for orthoses that encompass a body part or the body, for example orthoses for the back. The tensioning device allows the supporting action to be individually and segmentally adapted by means of individual, separate rope-and-pulley devices comprising at least one guide pulley and a reel that can be locked in position.