Trip-Latch Release Mechanism for Auto-Reset FRU Locking
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Solution Overview
Problem
Existing latching mechanisms for field replaceable units in electrical enclosures require manual reset to lock after removal, which can lead to improper seating if not done correctly, and may require significant force for insertion and removal due to numerous connectors.
Innovation Solution
A latching mechanism with a trip-latch and release button that automatically resets to lock when a field replaceable unit is reinserted, utilizing a spring and pivot points to facilitate easy insertion and removal while maintaining a release condition during removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If latches are used to facilitate insertion and removal of field replaceable units, then the force required for insertion and removal is reduced, but the latches may inadvertently relock during removal if not manually reset
Solution Approach 1:
The latch mechanism automatically resets to the locked position when the field replaceable unit is reinserted, eliminating the need for manual reset by the technician. The trip-latch mechanism self-actuates based on the physical state of unit insertion, making the system self-regulating without requiring user intervention to maintain proper latch state
Solution Approach 2:
The latch mechanism receives feedback from the physical presence or absence of the field replaceable unit. When the unit is inserted, it triggers the trip-latch to reset the latch to locked position; when removed, the latch remains in release position. This feedback loop ensures the latch state always corresponds to the actual insertion state
2Reliability
If multiple connectors are used for field replaceable units, then electrical connectivity is improved, but the force required for insertion and removal becomes considerable
Solution Approach 1:
The latching mechanism is divided into separate functional components: a release button for manual actuation, a trip-latch mechanism for automatic resetting, and a lever arm for force amplification. This segmentation allows each component to perform its specific function efficiently, with the lever arm specifically designed to reduce the insertion force while maintaining secure connection
Solution Approach 2:
The latch mechanism transitions between static locked and release states dynamically based on the insertion/removal action. The lever arm provides mechanical advantage during the transition, allowing the system to overcome the high friction force of multiple connectors temporarily during insertion/removal, then maintain a stable locked state during operation
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
Ensures proper seating of field replaceable units by automatically resetting the latch upon reinsertion, reducing the need for manual intervention and minimizing the force required for insertion and removal.
Implementation Method 1
a spring coupled to the protruding portion of the trip-latch that urges the trip-latch to protrude from the body
Implementation Method 2
a spring coupled to the release shaft that urges the release button to a non-depressed position
Data Source
AI summary
A latching mechanism includes a body having a trip-latch with a protruding portion that protrudes from the body, a release button coupled to a release shaft disposed inside the body, and a holding edge disposed on the release shaft. The holding edge engages the trip-latch to maintain the release button in a depressed position. The holding edge disengages the trip-latch to place the release button in a non-depressed position in response to urging the protruding portion of the trip latch toward the rotatable body. The latching mechanism may also include a spring coupled to the release shaft that urges the release button to a non-depressed position. The latching mechanism may also include a spring coupled to the protruding portion of the trip-latch that urges the trip-latch to protrude from the body. A non-protruding portion of the trip-latch may engage the holding edge.