Retractable USB Connector ESD Protection via Conductive Spring
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Solution Overview
Problem
The development of various electronic card standards has led to compatibility issues between memory cards and host devices, and existing solutions for protecting connectors, such as retractable designs and caps, are prone to damage or loss, while also facing electrostatic discharge (ESD) challenges due to conductive housings.
Innovation Solution
A removable flash memory unit with a retractable USB connector featuring a conductive spring that provides an electrically conductive pathway between the connector and the housing, ensuring ESD protection by maintaining a low-resistance connection between the connector and the housing, even when the connector is extended or retracted, thus preventing damage from electrostatic discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a retractable connector design is used to protect the connector physically, then the connector is protected from damage, but the connector becomes susceptible to ESD when extended
Solution Approach 1:
A conductive spring is introduced as an intermediary element between the connector and the housing. This spring provides a dedicated ESD protection pathway that is independent of the connector's position (retracted or extended), allowing electrostatic discharge to be safely directed to ground without affecting the connector's mechanical protection functionality
Solution Approach 2:
The ESD protection function is separated from the mechanical protection function. The conductive spring handles ESD protection independently while the housing structure maintains mechanical protection, allowing both functions to operate effectively without interfering with each other
2Reliability
If a conductive spring is added to provide ESD protection, then ESD protection is improved, but the device complexity increases
Solution Approach 1:
The conductive spring is integrated with the existing housing structure, merging the ESD protection function into the overall connector assembly rather than adding a completely separate system. This integration minimizes the increase in device complexity while achieving reliable ESD protection
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 solution effectively protects the memory system from ESD by providing a reliable, low-resistance ground path for electrostatic discharge, ensuring the connector's safety and functionality across different positions, enhancing the durability and usability of the memory unit.
Implementation Method 1
A conductive spring provides an electrically conductive pathway between the connector and the housing
Implementation Method 2
ensuring ESD protection by maintaining a low-resistance connection between the connector and the housing, thus preventing damage from electrostatic discharge
Data Source
AI summary
A Universal Serial Bus flash memory unit having an electrically conductive housing includes a spring that provides an electrically conductive, low-resistance pathway between the housing and the metal shell of the Universal Serial Bus connector so that electrostatic charge can directly discharge from the housing to the metal shell instead of discharging through electronic components within the housing.