Pivoting Loop Slider Wristband for Precise Sensor Fit
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Solution Overview
Problem
Traditional wrist-wearable devices lack a consistent and precise closure mechanism that adjusts for stretch over time, leading to inconsistent fit and performance of bio-potential sensors.
Innovation Solution
A pivoting loop slider mechanism with an asymmetrical end cap that provides both large and fine adjustments to the tightness of the wrist-wearable device, allowing for stretch compensation and maintaining a consistent fit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional watch loop bands with stepped notches are used, then the closure system is simple and easy to manufacture, but the adjustment precision is poor and the fit becomes inconsistent over time due to material stretch
Solution Approach 1:
The closure mechanism transitions from static stepped notches to a dynamic continuous adjustment system. The elastic member with variable stiffness allows the band to be adjustable at any position along its length, enabling continuous fine-tuning of the fit while accommodating material stretch over time
Solution Approach 2:
The patent changes the physical parameter of the closure mechanism by introducing variable stiffness along the elastic member. The stiffness varies continuously or in segments, allowing different portions of the band to provide different levels of resistance to adjustment, thereby achieving precise control over the fit
2Reliability
If traditional closure systems are used, then the device structure is simple, but the consistency of fit over time deteriorates due to material stretch
Solution Approach 1:
The dynamic adjustment mechanism allows the user to compensate for material stretch by re-adjusting the band position over time. The continuous adjustment capability ensures that the fit remains consistent even as the material properties change with wear and stretching
Solution Approach 2:
The elastic member with variable stiffness is designed to work with the natural stretch characteristics of the band material. The system self-adjusts to maintain proper fit by allowing easy re-positioning when the material stretches, without requiring complex replacement or recalibration mechanisms
3Ease of operation
If stepped notches are used for adjustment, then the manufacturing process is simple, but the user experience deteriorates due to imprecise adjustment and inability to accommodate stretch
Solution Approach 1:
The closure mechanism allows dynamic adjustment at any position along the band rather than being constrained to fixed stepped notches. This provides both ease of operation (continuous adjustment) and measurement precision (fine-tuned tightness control)
Solution Approach 2:
The variable stiffness parameter along the elastic member enables precise control over adjustment granularity. Different stiffness zones allow for coarse adjustments in some areas and fine adjustments in others, optimizing both ease of operation and precision
Data Source
AI summary
A wrist-wearable device comprises a pivoting loop slider that is coupled to a first band and configured to receive a second band, the pivoting slider is configured to pivot around the end of the first band, such that when the pivoting slider has a first position relative to the end of the first band the pivoting slider provides a first clamping force on the second band of the wrist-wearable device. The first clamping force is configured to provide large adjustments to the tightness of the wrist-wearable device about a wrist of a user. When the pivoting slider has a second position relative to the end of the first band, the pivoting slider provides a second clamping force on the second band. The second clamping force is greater than the first clamping force and provides finer adjustments to the tightness of the wrist-wearable device about a wrist of the user.