Push-Lock Caster Wheel Mechanism for Accessible Locking
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Solution Overview
Problem
Existing caster wheels for roll cabs and similar devices often require complex mechanisms or cumbersome foot pedals for locking and unlocking, which can be inconvenient and less accessible for users.
Innovation Solution
A push-lock, push-unlock mechanism integrated into the caster wheel, featuring a button and spring bias, allows for easy locking and unlocking by pushing the button inward to engage frictional resistance and retracting under spring bias to release the lock, similar to a push-button pen mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a foot pedal mechanism is used to lock the wheel, then the wheel can be locked into place, but the mechanism becomes cumbersome and less accessible for users
Solution Approach 1:
The patent inverts the conventional foot pedal mechanism by placing the actuation interface on the side of the wheel where it is easily accessible to users. Instead of requiring users to extend their foot forward to operate a pedal, the locking mechanism is activated by pushing a button or lever located on the side of the wheel assembly, making it immediately accessible without changing posture or reaching.
Solution Approach 2:
The patent extracts the locking function from the foot pedal mechanism and creates a separate, dedicated locking component. The foot pedal remains for propulsion, while a distinct side-mounted button or lever handles the locking function, eliminating the need for users to use their foot for both propulsion and locking operations simultaneously.
2Reliability
If a complex locking mechanism is used to ensure reliable wheel locking, then the locking reliability improves, but the device complexity increases
Solution Approach 1:
The patent combines the locking mechanism with the existing wheel assembly structure, integrating the button, spring, and wing components into the horn assembly. Rather than adding a separate complex locking system, the design merges the locking function into the structural elements already present in the caster wheel, reducing overall device complexity while maintaining reliable locking.
Solution Approach 2:
The spring-biased button mechanism automatically returns to its default position after being pressed, providing self-service operation. The spring automatically resets the locking mechanism after engagement, eliminating the need for additional actuators or complex control systems to return the mechanism to its initial state.
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 convenient and accessible method for users to lock and unlock caster wheels, enhancing usability and mobility by simplifying the locking process while maintaining effective frictional resistance.
Implementation Method 1
a spring biasing the button away from the wheel
Implementation Method 2
The wing is pushed inward toward the wheel when the lock mechanism is in the locked state
Data Source
AI summary
A caster wheel that locks and unlocks using a push-lock, push-unlock mechanism, similar to a push button pen. The mechanism can be placed on the side of the wheel to be easily accessible to the user and to allow a convenient locking of the caster wheel.