Rotary Adjuster Mechanism for Foot Platform Strap Tension
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Solution Overview
Problem
Existing toe strap systems for securing a user's foot to a pedal are often difficult to adjust, require complex operations, and lack intuitive design, leading to inefficiencies in pedaling and safety concerns.
Innovation Solution
A rotatable adjuster mechanism that allows for easy adjustment of the toe strap's length by rotating a knob, which engages a rack-and-pinion system to tighten or loosen the strap, providing precise control over the fit between the foot and the pedal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional buckle is used to adjust the toe strap length, then the strap length can be adjusted, but the adjustment operation becomes difficult and non-intuitive requiring training
Solution Approach 1:
The patent replaces the conventional mechanical buckle system with a dial-based adjustment mechanism that incorporates a rack and pinion gear system. This substitution transforms the complex buckle operation into a simple rotational dial operation, making it more intuitive and easier to use while maintaining adjustable strap length functionality.
Solution Approach 2:
The dial mechanism serves as an intermediary between the user's manual operation and the strap length adjustment. By rotating the dial, the user indirectly controls the strap length through the rack and pinion mechanism, which converts the rotational motion into linear motion that tightens or loosens the strap.
2Adaptability or versatility
If holes and peg arrangement is used for strap adjustment, then the strap length can be fixed at discrete positions, but the adjustment is limited to predetermined lengths and is not easily adjustable when foot is positioned
Solution Approach 1:
The patent transitions from a static holes-and-peg system to a dynamic dial-based system. The dial mechanism allows continuous adjustment of strap length while the foot is positioned on the pedal, providing real-time adjustability rather than requiring pre-positioning of the foot to access discrete adjustment points.
Solution Approach 2:
The patent extracts the adjustment mechanism from the foot position dependency. By placing the dial at the rear of the pedal platform within easy reach, the adjustment function is separated from the foot positioning requirement, allowing users to adjust strap length independently of foot placement.
3Adaptability or versatility
If hook-and-loop closure is used for strap adjustment, then the strap can be adjusted by tearing and re-positioning, but the adjustment becomes difficult and clumsy and the closure wears out after several adjustments
Solution Approach 1:
The patent replaces the hook-and-loop closure system with a dial-based tensioning mechanism incorporating rack and pinion gears. This mechanical substitution eliminates the wear and reliability issues associated with hook-and-loop materials while providing precise and repeatable adjustment capability.
Solution Approach 2:
The patent changes the adjustment parameter from positional (tearing and re-positioning hook-and-loop) to rotational (dial rotation). This parameter change enables precise control over strap tension while eliminating the degradation problems of material-based closures.
4Reliability
If clipless arrangement with cleat and socket is used, then secure connection is achieved, but the foot cannot be simply withdrawn and special cycling shoes are required
Solution Approach 1:
The patent implements a dynamic adjustment system that allows the foot connection security to be varied in real-time. By rotating the dial, users can transition from a tight secure connection to a looser configuration that facilitates easy foot withdrawal, providing adaptability between security and ease of removal.
Solution Approach 2:
The patent changes the connection parameter from fixed (cleat-socket engagement) to variable (adjustable strap tension). This allows the same system to provide both secure connection when tightened and easy withdrawal when loosened, eliminating the need for special footwear.
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 rotatable adjuster system simplifies the adjustment process, providing a secure and comfortable fit for the user's foot, enhancing pedaling efficiency and safety by allowing quick and precise adjustments.
Implementation Method 1
engages a rack-and-pinion system to tighten or loosen the strap
Data Source
AI summary
A foot retention system including: a foot platform with a platform surface, a strap having a first base portion, a second base portion and a loop portion between base portions; and a rotary adjuster connected to the strap. The first base portion and said second base portion are retained to the foot platform and the loop portion is vertically spaced from the foot platform. The strap and foot platform defines an opening to receive a user's foot and the rotary adjuster is rotatable about a rotary axis to adjust the perimeter length of the opening.