SIM Card Holder Metallic Dome for Hot-Plug State Detection
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Solution Overview
Problem
Existing cell phones with hot-plug function for SIM cards have complex designs that occupy motherboard space and increase product costs, hindering the trend of smaller devices.
Innovation Solution
A SIM card holder with an additional metallic dome that changes contact levels when the SIM card is plugged in or pulled out, allowing the master chip to identify these states without additional components, thus simplifying the design and maintaining existing layout and cost constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an electronic switch is used to monitor SIM card plug-in and pull-out states, then hot-plug function is achieved, but device complexity increases and motherboard space is occupied
Solution Approach 1:
The patent extracts the monitoring function from the motherboard domain by integrating it directly into the SIM card holder structure. The additional metallic dome is embedded in the holder base, eliminating the need for separate electronic switches on the motherboard. This extraction reduces motherboard space occupation and simplifies the overall system design while maintaining hot-plug functionality.
Solution Approach 2:
The patent merges the monitoring function with the SIM card holder structure itself. The additional metallic dome is integrated into the holder base, combining the mechanical support function with the electrical monitoring function in a single component. This merging eliminates the need for separate electronic switches and reduces system complexity.
2Adaptability or versatility
If an electronic switch is used to monitor SIM card plug-in and pull-out states, then hot-plug function is achieved, but product cost increases
Solution Approach 1:
The patent extracts the monitoring function from the motherboard domain and relocates it to the SIM card holder structure. This extraction eliminates the need for additional electronic components that would increase manufacturing cost, while maintaining the hot-plug functionality through the metallic dome's contact state changes.
Solution Approach 2:
The additional metallic dome serves multiple functions: it provides structural support as part of the holder base and simultaneously performs electrical monitoring by changing contact states. This multi-functionality reduces the need for separate components, simplifying manufacturing and reducing overall product cost.
3Measurement precision
If additional components are added to achieve hot-plug identification, then monitoring capability is improved, but motherboard space increases
Solution Approach 1:
The patent extracts the monitoring function from the motherboard domain and embeds it within the SIM card holder structure. The additional metallic dome is positioned in the holder base, eliminating the need for additional components on the motherboard while maintaining accurate plug-in state identification through contact state changes.
Solution Approach 2:
The monitoring function is nested within the SIM card holder structure itself. The additional metallic dome is embedded in the holder base, creating a nested arrangement where the monitoring capability is contained within the existing holder structure, thereby avoiding additional motherboard space requirements.
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
Enables simple identification of SIM card plug-in and pull-out states without increasing motherboard space or product cost, suitable for any mobile terminal, by using a metallic dome that transitions from high to low voltage levels when the SIM card is inserted or removed.
Implementation Method 1
the additional metallic dome is in an uncompressed state and in contact with high level when the SIM card is not plugged in the SIM card holder, and is in a compressed state and in contact with low level when the SIM card is plugged in the SIM card holder
Data Source
AI summary
The disclosure provides a subscriber identity module (SIM) card holder, a base of the SIM card holder is provided with SIM card metallic contacts and first fixed metallic pins connected with the metallic contacts; the base of the SIM card holder is further provided with an additional metallic dome; the additional metallic dome is in uncompressed state and in contact with high level when the SIM card is not plugged in the SIM card holder, and is in compressed state and in contact with low level when the SIM card is plugged in the SIM card holder, delivering the high/low level with which it is in contact to a master chip of a mobile terminal to identify the plug-in and pull-out of the SIM card. The disclosure further comprises a mobile terminal and a method of identification of the hot-plug of a SIM card. With the help of the disclosure, problems of complex design, occupation of motherboard space, increased product cost in existing cell phones with hot-plug of SIM cards may be solved.