Card Reader IC Contact Block Guide Shaft Maintenance
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Solution Overview
Problem
Existing card readers require complex maintenance and replacement procedures for the IC contact block, which can be cumbersome and prone to errors, especially due to the need for precise alignment and attachment of guide shafts and coming-off prevention members.
Innovation Solution
A card reader design featuring a detachable IC contact block with a guide shaft system, where the guide shaft is separately formed from the IC contact block and held by distinct shaft holding parts, allowing for easy detachment and reattachment, and utilizing cam grooves and recessed parts for smooth movement between contact and retreated positions, along with a tension coil spring for positioning, and a waterproof cover for prevention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the IC contact block is integrated with the guide shaft and held firmly in the main body frame, then the structural stability and reliability are improved, but the ease of maintenance and replacement deteriorates
Solution Approach 1:
The guide shaft is separated into multiple sections: a first guide shaft portion held by a first shaft holding part, and a second guide shaft portion held by a second shaft holding part. This segmentation allows the IC contact block to be detached by removing only the second shaft holding part, while the first shaft holding part remains fixed to maintain structural stability.
Solution Approach 2:
The second shaft holding part is designed as a detachable component that can be removed from the main body frame. This extraction enables the guide shaft to be partially removed, facilitating the detachment of the IC contact block for maintenance and replacement while leaving the first shaft holding part integrated to preserve overall structural integrity.
2Ease of repair
If the guide shaft is separately formed from the IC contact block with distinct shaft holding parts, then the ease of detachment and replacement is improved, but the device complexity increases
Solution Approach 1:
The first shaft holding part and the second shaft holding part are both integrated into the main body frame, merging their functions into a single structural component. This reduces the number of separate parts needed while still enabling easy detachment through the removable second shaft holding part.
Solution Approach 2:
The main body frame serves multiple functions: it holds both shaft holding parts, provides structural support, and enables the detachment mechanism. The first shaft holding part provides stable mounting while the second shaft holding part provides removable access, making the overall structure multi-functional without adding excessive complexity.
3Reliability
If the guide shaft is held firmly by shaft holding parts with coming-off prevention members, then the reliability and positioning accuracy are improved, but the ease of detachment for maintenance deteriorates
Solution Approach 1:
The shaft holding parts are divided into two segments with different attachment characteristics: the first shaft holding part uses a coming-off prevention member for secure, reliable positioning, while the second shaft holding part is designed without this prevention mechanism to allow easy detachment for maintenance.
Solution Approach 2:
Different portions of the guide shaft system have different attachment qualities: the first shaft holding part has high retention (with coming-off prevention) for stable positioning, while the second shaft holding part has low retention (without coming-off prevention) for easy removal. This local differentiation resolves the contradiction between reliability and ease of maintenance.
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 maintenance and replacement of the IC contact block, enhances wear resistance and slidability, reduces thermal contraction effects, and maintains data reading and recording quality by simplifying the structure and preventing guide shaft coming-off, while ensuring waterproofing and dust protection.
Implementation Method 1
a tension coil spring structured to urge the IC contact block toward the retreated position
Implementation Method 2
The arrangement hole is a first cam groove structured to move the IC contact block between the contact position and the retreated position together with the guide shaft
Data Source
AI summary
A card reader may include a main body frame, an IC contact block and a guide shaft for moving the IC contact block between a contact position and a retreated position. The guide shaft may be inserted through and pulled out from the IC contact block. The main body frame includes a first shaft holding part and a second shaft holding part which hold the ends of the guide shaft. The first shaft holding part is formed with an arrangement hole which is a first cam groove structured to move the IC contact block and the second shaft holding part is formed with a second cam groove structured to move the IC contact block. A coming-off prevention member which prevents coming-off of the guide shaft from the first shaft holding part and the second shaft holding part is detachably attached to the guide shaft or the main body frame.