SIM Card Ejection Mechanism with Fool-Proof Asymmetric Guide
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Solution Overview
Problem
Conventional SIM card fixing modules are difficult to remove and lack fool-proof mechanisms to prevent incorrect insertion and sliding out.
Innovation Solution
A card fixing module comprising a housing, a card holder with an elastic element and hooks, which allows easy ejection of the card by applying an elastic force and prevents incorrect insertion through a fool-proof design with notches and hooks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional friction-based SIM card removal is used, then the SIM card is securely held in place, but the SIM card becomes difficult to remove
Solution Approach 1:
The card holder is designed to be movable between a first position (secured state) and a second position (ejection state). When the user presses the pressing portion, the card holder moves from the first position to the second position, allowing the elastic element to push the SIM card out. This dynamic mechanism resolves the contradiction by providing both secure retention (when in first position) and easy removal (when moved to second position).
Solution Approach 2:
The elastic element automatically pushes the SIM card out when the card holder moves to the second position, eliminating the need for users to manually pull or pry the card out. The system serves itself by using the movement of the card holder to trigger the ejection mechanism, making card removal easy while maintaining secure retention when installed.
2Reliability
If conventional SIM card fixing is used, then the structure is simple, but fool-proof design is lacking and incorrect insertion cannot be detected
Solution Approach 1:
The card holder includes a notched portion with a specific asymmetric shape that must match the corresponding protrusion on the SIM card. This asymmetric design ensures that the card can only be inserted in the correct orientation, providing fool-proof insertion prevention. The notched portion's specific geometry prevents incorrect insertion while adding minimal structural complexity.
Solution Approach 2:
The notched portion acts as an intermediary element between the card holder and the SIM card. This intermediate structure mediates the insertion process by physically blocking incorrect orientations and guiding the card into the correct position, thereby enhancing reliability without significantly increasing overall device complexity.
3Ease of operation
If the SIM card is held firmly in the card receiving portion, then the card is securely retained, but the card cannot be easily accessed or removed
Solution Approach 1:
The card holder is segmented into distinct functional portions: a body portion, an abutting portion, a pressing portion, and a notched portion. This segmentation allows each part to perform its specific function independently - the abutting portion provides secure retention, the pressing portion enables easy access, and the notched portion ensures correct insertion. By dividing the card holder into these functional segments, the design achieves easy card access without excessive overall complexity.
Solution Approach 2:
The card holder transitions between static (secured) and dynamic (ejection) states. When the user presses the pressing portion, the card holder dynamically moves from the first position to the second position, triggering the elastic element to push the card out. This dynamic behavior provides easy card access while maintaining a simple overall mechanism that only activates when needed.
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
Facilitates easy access and secure retention of the SIM card by enabling easy removal and preventing incorrect insertion and sliding out.
Implementation Method 1
the elastic element applies an elastic force to the card holder to move the card holder from the first position to the second position to push the card out of the opening
Data Source
AI summary
A card fixing module for fixing a card is provided. The card fixing module comprises a housing, a card holder and an elastic element. The housing comprises an opening and a through hole, wherein the through hole corresponds to the opening. The card holder comprises a body portion, an abutting portion and a post, wherein the abutting portion is connected to the body portion, the post is connected to the body portion, the post passes through the through hole, the card holder is moved between a first position and a second position, and wherein when the card holder is in the first position, the abutting portion abuts the housing, and the card is received in the housing. The elastic element is telescoped on the post, an end of the elastic element contacts the housing, and the other end of the elastic element contacts the body portion, wherein the elastic element applies an elastic force to the card holder to move the card holder from the first position to the second position to push the card out of the opening.