Clipless Pedal Release Triggered by Bicycle Tilt
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Solution Overview
Problem
Cyclists, especially beginners, face difficulties in quickly and safely decoupling their feet from bicycle pedals, particularly in emergency situations, due to the time required to rotate their feet to release cleats in clipless systems, leading to potential crashes.
Innovation Solution
A module on the shoe or pedal that detects tilt exceeding a threshold, automatically unlocking the release mechanism to allow decoupling via a natural lifting motion, independent of foot rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a clipless system with a jaw and cleat is used to hold the shoe in a fixed position on the pedal, then the shoe retention is improved and upward force application is enabled, but the time required to remove the foot from the pedal increases due to the need to rotate the foot
Solution Approach 1:
The pedal system transitions from a static locked state to a dynamic unlocked state through detection of abnormal conditions (tilt, crash, emergency). The release mechanism remains locked during normal operation but automatically unlocks when specific conditions are detected, allowing the shoe to be removed without foot rotation. This dynamic state change resolves the contradiction by maintaining strong retention during normal use while enabling rapid release during emergencies.
Solution Approach 2:
The manual mechanical release action (rotating the foot) is replaced with an automated detection and release system. Sensors detect abnormal conditions such as excessive tilt or crash impacts, and the system automatically actuates the release mechanism, substituting the complex mechanical foot rotation with a simpler automated process that frees the shoe rapidly.
2Reliability
If the release mechanism requires foot rotation to unlock the cleat from the jaw, then the shoe can be securely retained, but the ease of operation deteriorates in emergency situations
Solution Approach 1:
The system performs the release operation automatically without requiring the user to execute complex foot rotation movements. The detection mechanism monitors for emergency conditions and the release mechanism self-actuates to unlock the cleat, allowing the shoe to be removed simply by lifting the foot. This self-service approach maintains secure retention during normal use while dramatically improving ease of operation during emergencies.
Solution Approach 2:
The release mechanism is prepared in advance to unlock automatically when specific conditions are detected. The system pre-configures the release path and mechanism so that when an emergency is detected, the shoe can be freed immediately without requiring the user to learn or execute complex rotational movements, thus improving ease of operation while maintaining reliability.
3Stability of the object's composition
If a fixed retention system is used to hold the shoe on the pedal, then the shoe position stability is improved, but the ability to quickly decouple in emergencies deteriorates
Solution Approach 1:
The retention system transitions from a static fixed state to a dynamic release state upon detection of emergency conditions. During normal operation, the shoe is held firmly in position by the locked jaw-cleat connection. When abnormal conditions such as excessive tilt or crash impact are detected, the system dynamically changes state to unlock the retention mechanism, enabling rapid decoupling without compromising normal position stability.
Solution Approach 2:
The system prepares counter-measures in advance by detecting emergency conditions before they result in a crash. The detection mechanism monitors for abnormal tilt angles or impact forces and pre-actuates the release mechanism, preventing the harmful effect of being trapped on the pedal during a crash by having the release mechanism ready to unlock before the emergency fully develops.
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 safe and quick decoupling of the shoe from the pedal in emergency situations, enhancing cyclist safety by allowing the foot to be placed on the ground for stabilization or dismounting without requiring complex foot movements.
Implementation Method 1
detecting a tilt at the module
Data Source
AI summary
Modules provide the ability of a cleat that couples a shoe to a bicycle pedal to be decoupled via natural lifting motion of the foot upon the occurrence of a specific circumstance such as a tilt of the bicycle indicative of an imminent crash. This allows the rider to use their foot that is no longer coupled to the pedal to potentially eliminate or lessen the crash and/or dismount the bicycle without needing to first perform a cleat release maneuver such as rotating the rear of the foot outward. Shoes may be configured with the module to allow the cleat to decouple from the shoe via the natural lifting motion of the foot in the specific circumstance. Pedals may be configured with the module to allow the cleat to decouple from the pedal via the natural lifting motion of the foot in the specific circumstance.