Card Holder Spring Ejection Mechanism
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Solution Overview
Problem
Conventional card holders in terminals with irremovable batteries require the use of a pin to eject the card tray, which is inconvenient for users.
Innovation Solution
A card holder design that includes a card locker with a control button, a card fastener, and a card-seat spring, allowing the card tray to be ejected and retracted without a pin by compressing and recovering the spring, respectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a pin mechanism is used to eject the card tray, then the card tray can be ejected, but the operation becomes inconvenient and requires an additional tool
Solution Approach 1:
The card tray ejection mechanism uses a spring-loaded button that the user can directly press to eject the card tray, eliminating the need for an external pin tool. The system serves itself by incorporating the ejection function directly into the card holder structure, allowing users to simply press the button with their finger to achieve ejection.
Solution Approach 2:
The invention extracts the ejection function from the traditional pin-based external tool and integrates it directly into the card holder body through a button mechanism. This allows the ejection function to be built-in rather than requiring an separate tool, improving ease of operation.
2Ease of operation
If a control button mechanism is added to enable direct ejection, then user convenience is improved, but the device structure becomes more complex
Solution Approach 1:
The control button, spring mechanism, and card tray ejection function are merged into a single integrated assembly within the card holder. The button is directly coupled to the spring and lever mechanism, combining multiple functions (control input, force storage, and ejection action) into one compact unit that adds minimal structural complexity.
Solution Approach 2:
The spring acts as an intermediary between the button press and the card tray ejection. When the button is pressed, the spring compresses and then releases stored energy to push the card tray outward, mediating the force transmission in a compact manner that reduces direct mechanical linkage complexity.
3Ease of operation
If the card fastener moves away from the card tray to unlock, then the card tray can be ejected, but the spring must be compressed and recovered requiring additional space
Solution Approach 1:
The spring mechanism is nested within the card holder body structure, with the spring positioned in a recess or cavity that is already part of the card holder design. The button and lever mechanisms are also nested within the existing structural space, minimizing the additional volume required while still accommodating the motion and compression needs of the ejection system.
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 easy and efficient ejection and retraction of the card tray using a control button, improving user convenience and eliminating the need for a pin.
Implementation Method 1
the card tray is pressed against the card-seat spring to cause the card-seat spring to be in a compressed state... the card-seat spring ejects the card tray through the opening by recovering from the compressed state to a normal state
Data Source
AI summary
A card holder includes a card locker, a connector, and a card tray. The card locker includes a control button, a card fastener, and a housing having an opening. The connector includes a card-seat spring. The card tray is configured to be inserted into the connector through the opening. When the card fastener and the card tray are engaged with each other in a locked state, the card tray is pressed against the card-seat spring to cause the card-seat spring to be in a compressed state. When the control button controls the card fastener to move away from the card tray such that the card fastener and the card tray are in an unlocked state, the card-seat spring ejects the card tray through the opening by recovering from the compressed state to a normal state.