Optical Lace Tension Sensing Assembly for Precise Fit Control
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Solution Overview
Problem
Existing footwear lacks a precise mechanism to control the tension of lacing systems, leading to inconsistent fit and user discomfort.
Innovation Solution
A tensioning system with a reel member, lead screw, and optical sensing unit that allows for controlled tightening and loosening of laces, using an indicator tab to monitor tension levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a traditional lacing system is used, then the footwear can be easily manufactured and operated, but the fit is inconsistent and user comfort is reduced
Solution Approach 1:
The lacing system is segmented into independent functional modules: a reel member for winding/unwinding, a lead screw for linear motion conversion, an indicator tab for position display, and an optical sensing unit for detection. Each module performs a specific function, allowing precise tension control while maintaining manageable system complexity through modular design.
Solution Approach 2:
The optical sensing unit detects the position of the indicator tab and provides feedback to the control system. This feedback mechanism enables the system to monitor tension levels in real-time and adjust the reel member's rotation accordingly, achieving precise tension control through closed-loop feedback.
2Adaptability or versatility
If no tension monitoring mechanism is used, then the system is simpler, but the fit customization is impossible
Solution Approach 1:
The indicator tab serves as an intermediary mechanical element that converts the rotational position of the lead screw into a linear displacement that can be easily detected by the optical sensing unit. This intermediary mechanism enables fit customization by providing a reliable interface between the mechanical tensioning system and the optical detection system.
3Manufacturing precision
If manual lacing adjustment is used, then the system is simpler to manufacture, but the tension consistency is poor
Solution Approach 1:
The manual mechanical adjustment system is replaced with an automated system that uses an optical sensing unit to detect tension levels and a control mechanism to regulate the reel member's rotation. This substitution of manual operation with automated sensing and control ensures uniform tension application while the modular design keeps assembly complexity manageable.
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
Provides a customizable and comfortable fit by ensuring the laces are tightened or loosened to the desired tension, enhancing user comfort and convenience.
Implementation Method 1
an optical sensing unit positioned adjacent the lead screw
Data Source
AI summary
A position sensing assembly for a tensioning system designed to provide tension to a lace, cord, or other type of strand is disclosed. The tensioning system includes a reel member configured to rotate about a central axis and the position sensing assembly. The position sensing assembly includes a shaft, an indicator tab, and an optical sensing unit. The position sensing assembly assists in controlling the degree to which the strand is tightened and loosened. The position sensing assembly prevents tightening of the strand when the strand is meant to be loosened.