Sliding Expansion Data Card Grounding Design
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Solution Overview
Problem
The grounding effect of data cards with sliding expansion USB connectors is poor due to their long grounding loop path, which affects electromagnetic compatibility (EMC).
Innovation Solution
A sliding expansion data card design featuring a spring plate fixed beside a shield on the main bearing plate, allowing static electricity to flow directly to earth through the spring plate, thereby shortening the grounding loop and enhancing the grounding effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a sliding expansion USB connector with back-to-back connector, deck bearing plate, and sliding soft plate is used, then the data card can achieve sliding expansion functionality, but the grounding loop path becomes long and grounding effect deteriorates
Solution Approach 1:
The patent extracts the grounding function from the complex sliding connector structure and implements it through a separate spring plate grounding structure. The spring plate is fixed to the shielding layer and contacts the data card interface, creating an independent grounding path that bypasses the long loop through the back-to-back connector and deck bearing plate.
Solution Approach 2:
The spring plate acts as an intermediary element that directly connects the data card interface to the shielding layer (which is connected to earth ground). This intermediary structure shortens the grounding path by eliminating unnecessary intermediate components in the grounding loop.
2Adaptability or versatility
If a traditional sliding expansion connector structure is used, then sliding functionality is achieved, but the device occupies more space
Solution Approach 1:
The patent merges the grounding function with the sliding connector structure by integrating the spring plate into the existing assembly. The spring plate serves dual purposes: providing grounding and maintaining mechanical contact during sliding operations, thereby reducing the need for separate grounding components and minimizing overall device area.
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 improves the grounding effect while occupying less space, resulting in better electromagnetic compatibility and circuit performance.
Implementation Method 1
the spring plate contacts the data card interface, so that the sliding expansion data card enables static electricity on the main bearing plate to flow from the data card interface to the earth directly through the spring plate
Data Source
Figure 1
AI summary
An embodiment of the present invention provides a sliding expansion data card and relates to a data card connected to computers and communications devices. To overcome the problem in the prior art where the grounding effect is poor due to a long grounding loop path of a data card with a sliding expansion USB connector, a sliding expansion data card is designed, including a data card interface, a spring plate, a main bearing plate, and a shield. The data card interface is set at one end of the main bearing plate. One end of the spring plate is set on the shield which is located on the lower surface of the main bearing plate, and the other end contacts the data card interface. With the present invention, the data card with the sliding expansion USB connector has a better grounding effect.