SIM Card Ejector Mechanism with Elastic Blocking
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Solution Overview
Problem
Conventional fixing devices for SIM cards in portable electronic products face issues with space constraints and potential damage due to inappropriate force application during insertion or removal, as they occupy significant space on the circuit board and lack efficient mechanisms to securely fasten and eject the card.
Innovation Solution
A fixing device comprising a sliding element, an elastic element, and a blocking element that allows the SIM card to be securely fastened and ejected through a setting opening, utilizing the elastic element to push the sliding element and prevent exposure, with a limiting element to control the sliding direction, reducing the need for extensive space on the circuit board.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional fixing device with fixing elastomers is used, then the SIM card can be fixed and electrically connected, but the SIM card is exposed and the space for inserting the SIM card is limited, making the SIM card vulnerable to damage
Solution Approach 1:
The fixing device is divided into separate functional modules: a limiting element (first limiting portion) that guides and protects the SIM card during insertion, and a fixing element (second limiting portion) that secures the SIM card in place. This segmentation allows each component to perform its specific function optimally while protecting the SIM card from damage.
2Ease of operation
If a push-push type fixing device is used, then the SIM card can be easily installed and taken out, but the device occupies significant space on the circuit board
Solution Approach 1:
The limiting element extends in the thickness direction of the circuit board, utilizing the Z-dimension to provide guiding and protective functions. This dimensional approach allows the device to achieve push-push functionality without requiring additional planar space on the circuit board, effectively solving the space constraint problem.
3Ease of operation
If the SIM card is exposed in the fixing device, then the setting opening is accessible, but the SIM card is vulnerable to abrasion from inappropriate force application
Solution Approach 1:
The limiting element is designed to contact the SIM card before it fully enters the fixing device, providing guidance and protection in advance. This preliminary cushioning prevents inappropriate force application and potential abrasion during the insertion process, while still allowing easy access to the setting opening.
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 reduces the risk of damage from improper force application and minimizes the occupied space on the circuit board, enabling easier installation and removal of SIM cards while ensuring secure electrical connection.
Implementation Method 1
utilizing the elastic element to push the sliding element and prevent exposure
Data Source
AI summary
A fixing device for an electronic card is disposed at the inside of the housing of a portable electronic product, and at least includes a sliding element, an elastic element and a blocking element. The sliding element pushes against the electronic card, and when the front end of the sliding element enters or is eject from the portable electronic product through a setting opening, it drives the electronic card to enter or be eject from the portable electronic product through the setting opening. The elastic element pushes the sliding element by its elastic action, and makes the front end of sliding element exposed outside the housing through the setting opening. The blocking element is adjacent to the setting opening. When the front end of the sliding element enters into the portable electronic product through the setting opening, the blocking element can push against the front end of the sliding element to prevent the sliding element from being exposed outside the housing because of the action of the elastic element.