Magnetic Orthotic Cuff for Modular Load Transfer
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Solution Overview
Problem
Existing orthotic solutions for individuals with partial or complete hand function loss are often poorly adapted, expensive, and restrictive, failing to provide comfort, intuitiveness, and efficient load transfer to the limb.
Innovation Solution
A cuff system comprising a lower shell and fixation element with magnetic and form fit connections, allowing for easy attachment and detachment, and a modular design with a ratchet system for adjustable load transfer, manufactured using additive manufacturing techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing orthotic solutions are used, then hand function support is provided, but they are poorly adapted, expensive and restricting in terms of activities
Solution Approach 1:
The orthotic system is divided into modular components: a cuff base, a fixation element, and interchangeable accessories. Each component can be independently selected and combined based on specific activity requirements, enabling adaptability without requiring a completely different system for each task.
Solution Approach 2:
The cuff base and fixation element serve as universal components that can support multiple different accessories for various activities (cycling, shopping, sports). This multi-functional design allows one base system to replace multiple specialized orthotic devices.
2Reliability
If existing orthotic solutions are used, then hand function support is provided, but they are expensive
Solution Approach 1:
The design allows the expensive cuff base and fixation element to be retained and reused across multiple accessories and activities. Only the less expensive accessories need to be changed or replaced, reducing overall system cost while maintaining reliability of the core support structure.
3Adaptability or versatility
If existing orthotic solutions are used, then hand function support is provided, but they are restricting in terms of activities
Solution Approach 1:
The system transitions from static, activity-specific orthotic devices to a dynamic configuration where accessories can be changed based on current activity needs. The magnetic connection enables quick, tool-free attachment and detachment, making the system as easy to operate as traditional devices while vastly expanding activity range.
4Ease of operation
If magnetic connection is used for interlocking, then easy attachment and detachment is achieved, but load transfer capability must be maintained
Solution Approach 1:
The design combines two connection mechanisms: magnetic attraction for easy attachment and detachment, and form fit connections (geometric interlocking) for maintaining load transfer capability. The magnetic force guides the accessories into proper alignment while the form fit features provide mechanical strength for force transmission.
Solution Approach 2:
The magnetic connection acts as an intermediary that facilitates easy attachment by guiding the accessory into position, while the form fit connection serves as the primary load-bearing interface. This intermediary mechanism enables ease of operation without compromising the strength of the final connection.
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
The cuff system provides a lightweight, ergonomic, and user-friendly solution that effectively transfers load forces to the limb, supporting various activities and daily routines with modularity and adaptability.
Implementation Method 1
the interlocking between the lower shell and the fixation element comprises a magnetic connection, wherein in a body of the lower shell at least one first magnetic part is provided and in or at the fixation element at least one second magnetic part is provided such that by means of an attracting magnetic force between both magnetic parts the fixation element can be moved onto one side of the body of the lower shell or is or can be held on one side of the body of the lower shell
Data Source
AI summary
A cuff combinable with accessories for forming an orthotic system comprises a cuff base in form of a lower shell and a fixation element combinable into one sleeve attachable to a limb through direct or indirect interlocking. The lower shell and the fixation element provide a system that can be tightened around the limb by reducing a circumference formed by the lower shell and the fixation element, such that load transfer from an accessory to the limb is enabled. First and second magnetic parts are provided in a body of the lower shell and in or at the fixation element. By means of an attracting magnetic force between both magnetic parts the fixation element can be moved onto one side of the body of the lower shell or can be held at one side of the body of the lower shell. An orthotic system is also disclosed.