Castor Brake Mechanism with Separate Pedals for Status Clarity
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Solution Overview
Problem
Conventional castors with integrated brake and release mechanisms can cause confusion and safety concerns due to the need to press the same pedal for both brake initiation and release, leading to potential accidental operations.
Innovation Solution
A castor design featuring separate brake and brake-release devices, where the brake pedal and brake-release pedal pivot in opposite directions when activated, allowing clear visual differentiation between brake states and preventing accidental operation, with the brake-release pedal engaging differently to return the system to its original position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single pedal is used for both brake initiation and release, then the device complexity is reduced, but the reliability decreases due to confusion and accidental operation
Solution Approach 1:
The single pedal mechanism is segmented into two separate pedals: a brake pedal for initiating the brake and a brake-release pedal for releasing it. This segmentation eliminates the confusion and accidental operation issues caused by using the same pedal for both functions, thereby improving reliability while maintaining reasonable device complexity.
Solution Approach 2:
The brake pedal and brake-release pedal act as intermediaries with distinct functions. The brake pedal engages the brake piece with the wheel, while the brake-release pedal disengages it. This intermediary mechanism provides clear operational separation and visual status indication, preventing accidental operations.
2Ease of operation
If a single pedal is used for both brake initiation and release, then the ease of operation is improved by simplifying the interface, but the loss of information increases due to inability to clearly identify brake status
Solution Approach 1:
By segmenting the control into two separate pedals with distinct functions, the system provides clear visual information about the brake status. The brake pedal being pressed indicates brake engagement, while the brake-release pedal being pressed indicates brake release, eliminating ambiguity about the current state.
Solution Approach 2:
While not explicitly using color changes, the invention uses positional and functional differentiation between the two pedals to provide visual status indication. The separate locations and orientations of the brake pedal and brake-release pedal make it easy to identify which pedal is active and what the current brake status is.
3Reliability
If separate brake and brake-release pedals are used, then the reliability improves by preventing accidental operation, but the device complexity increases
Solution Approach 1:
The brake control system is segmented into two distinct pedals with separate functions. This segmentation improves reliability by preventing accidental operations while the pedals are integrated into the existing shell structure, minimizing the increase in overall device complexity.
Solution Approach 2:
Both the brake pedal and brake-release pedal share the same basic structure and mounting mechanism within the shell, allowing them to be implemented with minimal additional complexity. The pedals utilize the same pivotal connection method and engage with the same toothed disc mechanism, providing universality in their design.
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 separate brake and brake-release pedals ensure accurate operation and easy identification of the castor's status, reducing confusion and enhancing safety by providing distinct actions for engaging and disengaging the brake, thus preventing accidental operation.
Implementation Method 1
one end of the brake piece 14 press against the wheel 12
Implementation Method 2
another end of the brake piece 14 tilt up and engage with toothed disc 13
Implementation Method 3
One end of the brake pedal is pivotally disposed between the two lateral pieces
Data Source
AI summary
A castor with separate brake device and brake release device is provided with a shell, a brake piece, a brake unit and a brake-release unit. The brake unit and the brake-release unit are two separate members, while they are interactively linked by a push portion and the notch portion, so as to ensure the accuracy of the brake operation. Whenever the castor is in a brake-activated status or brake-deactivated status, the brake pedal and the brake-release pedal pivot in opposite direction to present different angles, which makes it easier for the user to see the status of the castor (in brake position or non-brake position), and prevents confusion or accidental operation.