Sliding SIM Card Mechanism for Portable Terminals
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Solution Overview
Problem
The existing methods for installing and removing SIM cards from portable terminals are inconvenient and can cause damage to the cards, as they require removing the battery pack and involve mechanical stress.
Innovation Solution
A sliding member and cover mechanism is integrated into the portable terminal to allow the SIM card to be easily inserted and removed through an opening, with a buffer and cover projection system to prevent damage during insertion and removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the SIM card is installed on the lower case where the battery pack is installed, then the SIM card can be stored in the portable terminal, but the user must first remove the battery pack to install or remove the SIM card, which is inconvenient and may result in damage to the SIM card
Solution Approach 1:
The SIM card storage function is separated from the battery pack location. The SIM card is now stored in a dedicated SIM card slot with its own independent access mechanism (ejection hole and spring structure), allowing users to insert and remove SIM cards without interacting with the battery pack, thus improving convenience and preventing damage.
Solution Approach 2:
A spring mechanism acts as an intermediary between the SIM card and the SIM card slot. The spring provides automatic engagement and retention forces, ensuring the SIM card is securely held in place during normal operation while allowing easy ejection through the ejection hole, thereby preventing damage during installation and removal.
2Ease of operation
If the SIM card is installed in a dedicated slot with sliding mechanism, then the SIM card can be easily inserted and removed without removing the battery pack, but the device structure becomes more complex
Solution Approach 1:
The SIM card installation and removal function is extracted as a separate, self-contained mechanism. The ejection hole, spring, and SIM card slot form an independent subsystem that can be accessed without disassembling other parts of the device, simplifying the user interaction while maintaining functional integration within the overall device structure.
Solution Approach 2:
The spring mechanism provides self-service functionality by automatically engaging and retaining the SIM card in the slot. The elastic deformation of the spring creates retention force without requiring additional actuators or complex control systems, achieving reliable SIM card holding with minimal structural complexity.
Data Source
AI summary
An apparatus for detachably installing a smart card, such as a Subscriber Identity Module (SIM) card, in a portable terminal is provided. The apparatus includes an opening on the portable terminal, a sliding member slidably coupled to the terminal to move in and out of the opening, and a cover on an end portion of the sliding member to open and close the opening as the sliding member slides. The SIM card is placed on the sliding member to move in and out of the opening through a sliding movement of the sliding member. The apparatus prevent damage to the SIM card when it is detachably installed in the portable terminal through the sliding movement of the sliding member.