Adjustable Artificial Appliance Fit via Lace Tensioning
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Solution Overview
Problem
Artificial appliances such as prosthetics and orthotics often require adjustments in fit due to changes in limb size caused by swelling, healing, or growth, leading to discomfort and the need for frequent replacements.
Innovation Solution
An artificial appliance adjustability system comprising a surface guide device, a releasing tab, a reel device, a surface collar, a surface shim, and a lace, which allows for adjustable tension to be applied to the lace, enabling the adjustment of the appliance's fit by altering the diameter of the socket.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the appliance is made with a fixed size, then the manufacturing cost is reduced, but the adaptability to changing limb sizes deteriorates
Solution Approach 1:
The adjustment system is divided into discrete modular components including surface guide devices, reel devices, laces, and shims that can be independently selected and combined. Each component serves a specific function in the adjustment process, allowing the system to be customized for different socket sizes and adjustment needs without requiring a completely different appliance.
Solution Approach 2:
The system transitions from a static, fixed-size appliance to a dynamic, adjustable structure. The reel device mechanism allows the lace tension to be dynamically adjusted, and the shims enable the socket diameter to be changed, transforming the appliance from a rigid structure to one that can adapt to changing limb dimensions over time.
2Adaptability or versatility
If the appliance structure is simplified, then the ease of manufacture is improved, but the adjustability function deteriorates
Solution Approach 1:
The surface guide devices and reel devices are designed as universal components that can be used across multiple appliance types and sizes. The same basic component design can accommodate different socket configurations, reducing the number of unique parts that need to be manufactured while maintaining full adjustability functionality.
Solution Approach 2:
The lace acts as an intermediary element that connects various structural components of the appliance. By adjusting the lace tension through the reel device, the system can modify the fit and tension distribution across the socket without requiring direct mechanical adjustments to the structural bones or joints, simplifying the overall manufacturing process.
3Duration of action of stationary object
If the appliance is designed for long-term use, then the loss of time for replacements is reduced, but the comfort due to limb size changes deteriorates
Solution Approach 1:
The adjustment system is pre-configured with multiple shim sizes and lace tension capabilities that anticipate future limb size changes. Users can proactively adjust the fit as their limb grows or changes, preventing discomfort before it occurs rather than waiting for the appliance to become too loose or tight.
Solution Approach 2:
The system provides continuous feedback through the lace tension mechanism, allowing users to sense and adjust the fit as their limb dimensions change. The reel device enables users to monitor and modify tension levels, creating a feedback loop that maintains optimal comfort throughout the appliance's lifespan despite physiological changes.
Data Source
AI summary
Devices, systems, and methods used to make adjustments to an artificial appliance are disclosed. An artificial appliance adjustability system includes surface guide devices and a reel device. A releasing tab may be selectively coupled to the surface guide device. A lace is coupled to the surface guide devices and the reel device. Rotation of the reel device can apply tension to or release tension from the lace to adjust a portion of the artificial appliance.