Optical Transceiver Latch Lever Design for Secure Rail Engagement
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Solution Overview
Problem
Conventional pluggable optical transceivers experience irregular disengagement from host system rails due to external forces, especially when the rail is thick, leading to unintended release of the transceiver.
Innovation Solution
A latching mechanism featuring a grip, actuator, and elastic member, where the latch lever is configured with a stopper and working branch, and the latch end positions forward of the rotation center, enhancing engagement with the rail keyhole and preventing irregular release through a seesaw motion induced by the elastic member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the rail is made thick to provide structural strength, then the structural strength is improved, but the engagement reliability deteriorates because the actuator tip cannot properly hook onto the rail
Solution Approach 1:
The latch lever is segmented into two functional ends: one end engages with the rail keyhole while the other end interacts with the actuator. This segmentation allows the latch lever to translate actuator motion into effective latching action even when the actuator tip cannot directly hook onto a thick rail.
Solution Approach 2:
The latch lever acts as an intermediary between the actuator and the rail. Instead of requiring the actuator tip to directly engage the rail (which fails with thick rails), the latch lever mediates the engagement by hooking onto the rail keyhole and being actuated indirectly through the actuator's seesaw motion.
2Force
If the actuator tip directly engages with the thick rail wall surface, then the structural support is improved, but the engagement reliability deteriorates because the actuator cannot hook onto the rail
Solution Approach 1:
Instead of having the actuator tip directly hook onto the rail (conventional approach), the invention inverts the approach: the latch lever hooks onto the rail while the actuator pushes or pulls the latch lever. This inversion allows engagement with thick rails where direct actuator hooking fails.
3Ease of operation
If external force is applied to extract the transceiver without manipulating the grip, then the ease of operation is improved for forced removal, but the reliability deteriorates because the latching mechanism releases irregularly
Solution Approach 1:
The latching mechanism uses dynamic elements (elastic member providing seesaw motion, movable latch lever) that allow controlled release only through the designated grip operation, while maintaining stability against irregular external forces. The elastic member's restoring force ensures the latch returns to its engaged position unless properly actuated.
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 mechanism securely maintains engagement with the rail even under external forces, preventing unintended disengagement and ensuring reliable operation regardless of rail thickness.
Implementation Method 1
An elastic member 102 such as leaf spring always applies an outward force to the other end 101a of the actuator 101
Implementation Method 2
the actuator 101 performs the seesaw motion by the pivot 101b as a center
Data Source
AI summary
A pluggable optical transceiver is disclosed in which, even an irregular operation is carried out, the engagement between the transceiver and the rail may be secured. The optical transceiver, which is pluggable with the rail provided in the host system, includes a grip assembled with the receptacle, a latch lever to be engaged with the rail, a leaf spring that pushes the latch lever outward and an actuator to make a seesaw motion to rotate the latch lever synchronizing with the slide of the grip. Because the center of the rotation center of the latch lever positions inward with respect to the end of the latch lever, the engagement of the latch lever with the rail may be further secured even the irregular operating is applied in the latch lever.