Latching Mechanism for Pluggable Modules
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing latching mechanisms for pluggable modules in host devices either require separate extraction tools, leading to increased costs and compatibility issues, or have flexible receptacle edges that can cause electromagnetic interference.
Innovation Solution
A latching mechanism with a bail and latch that rotates about fixed and movable axes, allowing for secure module insertion and removal with a handle capable of withstanding high pull forces, and featuring a retractable engagement pin to prevent malfunction with rigid leading edges, while also providing EMI containment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a separate extraction tool is used to retrieve modules, then module retrieval is enabled, but costs increase and compatibility issues arise
Solution Approach 1:
The latching mechanism enables self-service by allowing module insertion and removal through the module's own handle structure. The bail and latch mechanism is integrated into the module itself, eliminating the need for external extraction tools. The handle can be directly manipulated to release the latch and remove the module.
Solution Approach 2:
The extraction function is merged with the module's own handle structure. The bail, latch, and handle are combined into a single integrated mechanism that is part of the module assembly, allowing the module to perform its own extraction function without requiring separate tools.
2Ease of operation
If the receptacle leading edge is made flexible to enable insertion/extraction, then module insertion and removal are enabled, but electromagnetic interference increases
Solution Approach 1:
The flexible leading edge is extracted from the receptacle design. Instead of making the receptacle flexible, the flexibility is transferred to the latching mechanism's bail component, which is designed to flex during engagement and disengagement while the receptacle leading edge remains rigid for EMI containment.
Solution Approach 2:
The latching function is segmented from the receptacle structure. The bail and latch mechanism operates independently within the module assembly, allowing the receptacle leading edge to remain rigid while the latching components provide the necessary flexibility for insertion and removal.
3Reliability
If the engagement pin remains extended in the latched position, then secure latching is achieved, but malfunction occurs with rigid leading edges
Solution Approach 1:
The engagement pin is made dynamic rather than static. The pin can extend to engage with the receptacle for secure latching, but can also retract when necessary. This dynamic capability allows the mechanism to adapt to rigid leading edges by retracting the pin temporarily during insertion, then extending it again for secure latching.
Solution Approach 2:
The engagement pin retracts in advance before contact with the rigid leading edge during insertion. This preliminary retraction prevents malfunction by ensuring the pin is not extended when it might contact a rigid edge, and it extends again after safe passage to achieve secure latching.
Data Source
AI summary
A latching mechanism for use in selectively securing a module within a receptacle of a host device. In one example embodiment, a latching mechanism includes a bail and a latch attached to the bail. The bail is configured to be attached to a shell of a module and to rotate about a first axis between a latched position and an unlatched position. The first axis is in a fixed position relative to the shell. The latch is attached to the bail at a second axis that is offset from the first axis. The latch is configured to rotate about the second axis. The second axis is movable relative to the shell.