Adjustable Wrist Deviator Torque via Movable Handle
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Solution Overview
Problem
Current therapeutic exercise devices for pronation and supination movements lack the ability to easily adjust the effective weight and provide accurate feedback on rotation angles, limiting patient progress tracking and therapy effectiveness.
Innovation Solution
A pronation supination wrist deviator exercise device with a handle and shaft system that allows for adjustable weight and angle indicators, enabling users to securely change the effective torque by modifying the distance between the head portion and handle, and featuring angle indicators such as bubble indicators or electronic displays to track and display rotation angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the effective weight is fixed in traditional exercise devices, then the device structure is simple, but the patient cannot easily adjust weight to track progress or perform fatigue training
Solution Approach 1:
The device divides the weight adjustment function into separate components: a head portion with predetermined weight and a handle that can be positioned at different locations along the shaft. By segmenting the weight element from the handle and allowing independent positioning, the system achieves multiple effective weight configurations without requiring complex adjustable mechanisms.
Solution Approach 2:
The handle is designed to be movable along the shaft to different positions, allowing dynamic adjustment of the distance between the handle and head portion. This dynamic positioning capability enables the patient to change effective torque during exercise progression while maintaining a relatively simple overall structure.
2Measurement precision
If traditional devices lack angle indicators, then the device is simpler, but therapists cannot accurately measure rotation angles to assess patient improvement
Solution Approach 1:
The device incorporates angle indicators (such as bubble indicators or electronic displays) that provide visual feedback to both the patient and therapist about the rotation angle achieved. This feedback mechanism enables accurate measurement of pronation and supination ranges while maintaining intuitive ease of use during exercise performance.
3Adaptability or versatility
If the distance between head portion and handle cannot be changed, then the device structure is simpler, but the effective torque cannot be adjusted for progressive strengthening
Solution Approach 1:
The device applies local quality by allowing the handle to be positioned at specific discrete locations along the shaft, each position providing a different effective torque. This localized positioning approach enables precise control of exercise intensity without requiring continuous adjustment mechanisms, balancing adaptability with structural simplicity.
4Adaptability or versatility
If Fatigue Training cannot be implemented, then the exercise regimen is simpler, but patient performance improvement is limited
Solution Approach 1:
The movable handle design enables dynamic reconfiguration of effective torque during exercise sessions. Patients can start with higher effective weights and quickly decrease to lower weights when exhausted, implementing Fatigue Training protocol without requiring complex electronic control systems. The mechanical flexibility alone suffices for this advanced training method.
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 patients to strengthen with adjustable weights and track improvements in rotation angles, providing therapists with accurate feedback for enhanced exercise therapy outcomes.
Implementation Method 1
an angle indicator indicating the angle between the central line in the central plane and a vertical line in space
Data Source
AI summary
A pronation supination wrist deviator exercise device includes a handle having a proximal portion and a distal portion; a shaft defining a longitudinal axis extending from a proximal end to a distal end; and a head portion having a predetermined weight. The head portion or the handle are mounted for relative movement on the shaft between a first position and a second position. The head portion and the handle define a first distance. The predetermined weight of the head portion represents a first weight. The first weight multiplied by the first distance represents a first effective torque of the device. When the distance between the head portion and the distal portion of the handle is changed to at least a second distance, the first weight multiplied by the second distance represents at least a second effective torque of the device.