Bottom-Mounted Delatch Assembly for Heavy Communication Modules
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Solution Overview
Problem
Larger optoelectronic communication modules, such as CFP and CDP, face challenges with secure and reliable latching due to their size and weight, as side-mounted latch mechanisms are inadequate, and thumbscrews occupy valuable space and are inconvenient for user installation and removal.
Innovation Solution
A delatch assembly with a pair of delatch arms, a delatch cross-member, and a hooking member is implemented, allowing the communication module to be securely latched and unlatched without specialized tools, accommodating higher-density port configurations and ensuring secure connectivity within the dimensions defined by industry standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If side-mounted latch mechanisms are used for larger communication modules, then the module can be secured to the port, but the latching is inadequate due to the module's size and weight
Solution Approach 1:
The latch mechanism transitions from a side-mounted configuration to a bottom-mounted configuration. The delatch assembly is positioned at the bottom of the module and engages with a catch pin extending from the port, utilizing the vertical dimension rather than lateral engagement. This dimensional change provides superior mechanical support for heavier modules.
Solution Approach 2:
The latch mechanism is divided into separate functional components: delatch arms that engage the catch pin, a delatch cross-member connecting the arms, and a delatch handle for user operation. This segmentation allows each component to be optimized for its specific function while collectively providing reliable latching for heavier modules.
2Reliability
If thumbscrews are used to secure larger communication modules, then the module can be firmly latched, but valuable space is occupied and installation/removal is inconvenient
Solution Approach 1:
The delatch mechanism is designed to be self-latching through the engagement of delatch arms with the catch pin, eliminating the need for threaded fasteners that require manual tightening. The user simply operates the delatch handle to engage or disengage the latching action, making installation and removal convenient without specialized tools.
Solution Approach 2:
The cumbersome thumbscrew mechanism is completely removed and replaced with a streamlined delatch assembly that uses simple arm engagement with the catch pin. This extraction of the problematic element (thumbscrews) eliminates both the space occupation and operational inconvenience while maintaining secure latching.
3Productivity
If the communication module is miniaturized to increase port density, then more connections fit in given space, but secure and reliable latching becomes more difficult
Solution Approach 1:
The latch engagement moves to the bottom of the module, utilizing the vertical space between the module and the port mounting surface. This dimensional relocation allows the latching mechanism to be effective regardless of the module's horizontal footprint, enabling miniaturization while maintaining secure attachment through the bottom-mounted delatch assembly engaging the catch pin.
Data Source
AI summary
A communication module includes a printed circuit board, a housing including a left and right sidewall, a top and bottom panel, and a catch pin extending from the bottom panel, the housing enclosing the circuit board and configured to be inserted into and removed from the host device, and a delatch assembly slidably engaged with the bottom panel of the housing, including first and second delatch arms extending underneath the bottom panel of the housing and configured to removably engage with the host device, and a delatch cross-member extending underneath the bottom panel of the housing, including a hooking member configured to selectively engage the catch pin as the delatch assembly slides along the housing.