Optical Module Clamp and Latch Mechanism for Height Reduction
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Solution Overview
Problem
Conventional optical modules face height limitations and misalignment issues due to latch mechanisms, restricting the positioning of optical subassemblies and limiting direct attachment to printed circuit boards, which complicates assembly and testing.
Innovation Solution
An optical module design featuring a clamp and latch mechanism with a pivot pin and actuator, allowing for secure OSA placement and access to the PCB, enabling direct attachment and improved alignment of optical axes, and a two-part housing structure for enhanced component placement and assembly flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional latch mechanism with bent tabs is used, then the optical module can be secured to the host device, but the height is limited and the optical axis positioning is restricted
Solution Approach 1:
The latch mechanism is divided into separate functional components: a clamp assembly that secures the OSA and a latch mechanism that engages with the host device. This segmentation allows the OSA to be positioned closer to the PCB while maintaining secure attachment, eliminating the height limitation caused by integrated bent tabs in conventional designs.
Solution Approach 2:
The invention transitions from a two-part housing design to a one-piece housing structure with an integrated clamp. This dimensional change eliminates the need for horizontal sliding assembly paths and allows vertical component placement, enabling direct attachment of the OSA to the PCB and improving height utilization.
2Ease of manufacture
If a two-part housing structure is used, then the optical module can be assembled, but the sliding path requirement limits component placement on the PCB
Solution Approach 1:
The clamp and housing are merged into a single integrated component, eliminating the need for separate clamp assembly and horizontal sliding paths. This integration maximizes the PCB area available for component placement while maintaining ease of assembly through the latch mechanism.
3Ease of manufacture
If the OSA is only held in place after two-part housing assembly, then the housing can be assembled, but the OSA is free to move during assembly and testing causing misalignment
Solution Approach 1:
The clamp is designed to secure the OSA to the housing before the housing itself is assembled to the latch mechanism. This preliminary securing action prevents OSA movement during subsequent assembly and testing operations, ensuring precise alignment from the outset.
4Reliability
If the clamp covers the PCB, then the OSA is secured, but access to the PCB is blocked for assembly and testing
Solution Approach 1:
The clamp is designed with movable or adjustable features that allow it to be positioned or opened during assembly and testing to provide access to the PCB, and then secured in a closed position during operation to maintain OSA stability. This dynamic design provides both security and accessibility.
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 design overcomes height limitations and misalignment issues, allowing for closer optical axis positioning, improved RF performance, and easier assembly and testing by securing OSAs while providing access to the PCB, thus enhancing functional density and operational efficiency.
Implementation Method 1
the pivot pin rotatably supported by the first housing structure and the clamp in cooperation
Data Source
AI summary
An optical module is provided for mounting in a cage of a host device. The optical module includes at least one optical subassembly (OSA) and a printed circuit board (PCB) supported by a first housing structure. The optical module also includes a latch mechanism, which includes a lever and a latch, as well as a clamp. A pivot pin of the latch is rotatably supported by the first housing structure and the clamp in cooperation. Advantageously, the clamp secures both the OSA and the latch, while providing access to the PCB.