Mechanical Key Assembly for Pluggable Module Socket Orientation
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Solution Overview
Problem
Existing methods for replacing pluggable modules in systems prone to human error, leading to improper installation and potential system malfunction, as they rely on correct identification and insertion of compatible modules.
Innovation Solution
Mechanical key assemblies that lock the rotational orientation of pluggable modules upon initial insertion, ensuring only compatible modules can be reinserted, with a mechanism to reset the key position manually to prevent unintentional re-keying.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical key assemblies are implemented to lock rotational orientation, then reliability of module installation is improved, but device complexity increases
Solution Approach 1:
The key assembly is nested within the module housing, with the key itself nested within the key receptacle. The fingers of the key base are nested within the housing, creating a compact integrated structure that reduces overall complexity while maintaining the locking function.
Solution Approach 2:
The key assembly automatically locks into position upon module insertion without requiring external actuation. The cam surface automatically rotates the key to the locked position, and the protrusions automatically engage with the slots to maintain the locked state, making the system self-activating and reducing operational complexity.
2Ease of operation
If key rotation mechanism is added to set positional orientation, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The cam surface is formed with a curved profile that guides the key through rotational movement as the module is inserted. This curved geometry naturally converts the linear insertion motion into rotational motion of the key, eliminating the need for separate rotational actuators and simplifying the overall mechanism.
Solution Approach 2:
The cam surface acts as an intermediary element between the linear insertion motion and the rotational locking action. By introducing this intermediate curved surface, the system smoothly transitions from one type of motion to another, making the operation intuitive and simple for the user.
3Ease of repair
If fingers are made resilient to engage and disengage from guide surface, then ease of repair is improved, but manufacturing precision requirements increase
Solution Approach 1:
The fingers are designed with specific resilient properties that allow them to flex within a controlled range. By carefully selecting the material and cross-sectional dimensions of the fingers, they can be made resilient enough to flex for resetting but stiff enough to maintain precise engagement, balancing manufacturability with functionality.
Data Source
AI summary
Key assemblies to mechanically key pluggable-module sockets are described. A disclosed example key assembly includes a key having a shaft, a first radial protrusion extending from the shaft and an annular guide surface on the shaft; and a key base having a plurality of fingers defining a plurality of radial slots and an opening to receive at least a portion of the shaft, wherein at least one of the fingers is to engage the annular guide surface to enable the key to rotate to a set position, and wherein the first radial protrusion is to engage one of the slots to rotationally hold the key in a set position when the at least one of the fingers forced out of engagement with the annular guide surface.