Actuator and Switch Mechanism for Safe Circuit Board Removal
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Solution Overview
Problem
The existing methods for removing circuit board modules from a chassis often result in signal loss due to improper deactivation, leading to inefficient data handling and system downtime.
Innovation Solution
An actuator with a locked and unlocked state, coupled with an electrical switch, is used to ensure the circuit board module is deactivated before removal, preventing signal loss by generating control signals to manage the module's state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the circuit board module is removed without deactivating it, then the removal operation is faster and simpler, but signal loss occurs and system reliability deteriorates
Solution Approach 1:
The system requires the technician to first deactivate the circuit board module by rotating the ejector handle to the deactivation position before removing the module. This preliminary deactivation action prevents signal loss and ensures reliable data handling during the removal operation, resolving the contradiction between operational simplicity and signal reliability.
2Reliability
If the ejector mechanism is added to control module removal, then signal loss is prevented, but device complexity increases
Solution Approach 1:
The ejector mechanism serves multiple functions: it provides the mechanical interface for inserting and removing circuit board modules, and simultaneously controls the deactivation/activation state of the module through its rotational positions. This multi-functionality prevents signal loss while minimizing the addition of separate control components, thereby managing device complexity.
Solution Approach 2:
The ejector handle acts as an intermediary mechanism that translates the technician's mechanical input into electrical control signals for deactivating the module. This intermediary approach allows reliable signal traffic control without requiring complex electronic interfaces or additional actuators, thus managing system complexity effectively.
3Reliability
If the module is deactivated before removal, then signal loss is prevented and system reliability improves, but the removal process takes longer
Solution Approach 1:
The deactivation action is performed as a preliminary step before removal, allowing the system to prepare for safe module extraction. While this adds a step to the process, it prevents signal loss and ensures data integrity, resolving the time reliability trade-off by making the additional time investment worthwhile through prevented signal loss.
Solution Approach 2:
The system provides feedback to the technician through the ejector handle position indicators, showing when the module is in the deactivated state and ready for removal. This feedback mechanism ensures proper sequencing of operations, preventing premature removal that would cause signal loss, and optimizing the overall removal process time through clear operational guidance.
Data Source
AI summary
A method and apparatus for controlling removal of a circuit board module from a chassis comprising an actuator and an electrical switch. The actuator having a locked state and an unlocked state, where the circuit board module is removable from the chassis when the actuator is in the unlocked state and the circuit board module is not removable when the actuator is in the locked state. The electrical switch is coupled to the actuator to produce a first signal indicating the locked state and a second signal indicating the unlocked state.