SIM Card Connector Arc Prevention
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Solution Overview
Problem
Existing SIM card connectors often result in card burnout when a SIM card is inserted or removed while the device is in a power-on state, due to momentary electric arcs between the SIM card and signal spring, causing contact area burnout and preventing card reading.
Innovation Solution
A SIM card connector with a detection apparatus and controller that disconnects the power supply of the signal spring before the SIM card is separated, and reconnects it after insertion, using a detection spring and trigger part to manage the power supply status, preventing electric arcs during insertion or removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the SIM card connector remains in power-on state during card insertion or removal, then the connector can maintain operational readiness and respond immediately, but momentary electric arcs are generated between the SIM card and signal spring causing contact area burnout
Solution Approach 1:
The detection spring and trigger part detect the insertion or removal action of the SIM card before the signal spring makes or breaks contact. The controller receives the detection signal in advance and prepares to switch the power supply state, preventing electric arcs by ensuring the signal spring is already in the appropriate state before contact occurs
Solution Approach 2:
The detection apparatus provides real-time feedback about the SIM card's insertion or removal status to the controller. This feedback loop enables the controller to dynamically adjust the power supply state of the signal spring based on the actual position and action of the SIM card, preventing harmful electric arcs while maintaining operational readiness
2Object-affected harmful factors
If the power supply is disconnected before SIM card insertion to prevent electric arcs, then card burnout is prevented, but the connector cannot respond immediately upon card insertion
Solution Approach 1:
The detection spring is positioned to detect the SIM card's insertion action before the signal spring makes contact. The controller receives this preliminary detection signal and switches the power supply to the connected state in advance, ensuring immediate responsiveness while preventing electric arcs by establishing the correct power state before contact occurs
Solution Approach 2:
The detection apparatus provides continuous feedback about the SIM card's position and insertion progress. This enables the controller to dynamically switch the power supply state at the precise moment when it is safe and necessary, achieving both immediate response and electric arc prevention
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
Prevents SIM card burnout by timely disconnection and reconnection of the power supply, ensuring safe insertion and removal operations without damaging the card.
Implementation Method 1
a second end of the detection spring performs clutch cooperation with the fixed contact by means of elastic deformation of the detection spring
Data Source
Figure 1
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Figure 4~5
AI summary
A SIM card connector includes a base, signal spring, a detection apparatus, and a controller. The detection apparatus is configured to cooperate with one side of a SIM card, and includes a fixed contact and a detection spring, where an action of the SIM card can be detected by separation or union between the fixed contact and the detection spring. A trigger part of the detection spring can press against the end of the SIM card to move a second end of the detection spring, and compared with a pressing part, the trigger part is closer to a bearer panel. In a process of removing or inserting the SIM card, the SIM card can move the second end of the detection spring, and trigger a change in separation and union between the detection spring and the fixed contact; the controller can disconnect a power supply of the signal spring before the SIM card is separated from the signal spring, and can switch on the power supply of the signal spring after the SIM card presses against the signal spring; the controller switches on or off the power supply in a timely manner, which effectively prevents the SIM card from being burned out by a momentary electric arc generated between the SIM card and the signal spring when the SIM card is being inserted or removed. The present invention further provides a mobile terminal having the foregoing SIM card connector.