Transaction Terminal Magnetic Head Antenna Interference Shield
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Solution Overview
Problem
Portable transaction terminal devices face challenges in securing communication quality due to the proximity of communication antennas to magnetic card readers, leading to incomplete transactions, especially when multiple communication functions and magnetic card reading are integrated within a compact design.
Innovation Solution
The transaction terminal device is designed with a housing configuration that separates communication antennas from the magnetic head module, using a metal wire spring as an urging member to maintain magnetic head stability while minimizing radio wave interference, and incorporates secure and non-secure regions for tamper resistance and PIN input, respectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If communication antennas are arranged close to the magnetic head for compact design, then device volume is reduced, but communication quality deteriorates due to radio wave interference
Solution Approach 1:
A shield member is introduced as an intermediary component between the communication antenna and the magnetic head. This shield member blocks radio waves from reaching the magnetic head, preventing interference while allowing both components to be positioned close together in the compact device housing.
2Adaptability or versatility
If multiple communication functions and magnetic card reading are integrated in a compact device, then portability is improved, but it becomes difficult to secure communication quality due to antenna proximity to magnetic head
Solution Approach 1:
The shield member serves as a mediator that enables the integration of multiple functions (communication and magnetic card reading) in a compact device by preventing radio wave interference between components, thus maintaining communication quality despite close proximity.
3Volume of moving object
If the housing is made compact for ease of carrying, then portability is improved, but the distance between communication antenna and magnetic head decreases causing interference
Solution Approach 1:
The shield member is positioned between the communication antenna and the magnetic head to block radio waves, preventing interference even when the housing dimensions are reduced for improved portability.
4Volume of moving object
If communication antenna is positioned near magnetic head to save space, then device compactness is improved, but transaction completion rate decreases due to poor communication quality
Solution Approach 1:
The shield member prevents radio wave interference between the communication antenna and magnetic head, ensuring stable communication quality and high transaction completion rates even in the compact device configuration.
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
This configuration enhances communication quality and reading stability of magnetic cards, allowing for successful transactions even in diverse environments, while ensuring security and ease of operation.
Implementation Method 1
using a metal wire spring as an urging member to maintain magnetic head stability
Data Source
AI summary
A transaction terminal device is provided. The device includes a magnetic head module that supports a magnetic head which reads a magnetic card. A plurality of communication antennas that communicate according to different standards are arranged at a same end of a housing as the magnetic head module. The magnetic head module includes a line-shaped metal urging member that exerts urging force to the magnetic head in a passing path direction of the magnetic card. The line-shaped metal urging member has a first straight portion exerting the urging force to the magnetic head in a direction perpendicular to the first straight portion when viewed from a side view of the transaction terminal device. Even though a communication antenna is arranged close to the magnetic head, a reradiated radio wave generated from the metal urging member of the magnetic head is reduced.