NFC Antenna Board Layout to Avoid Screw Interference
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Solution Overview
Problem
The presence of a metal screw between a medium and an antenna in information processing devices can interfere with communication, particularly when the antenna board is fixed to a case using this screw, affecting the non-contact data reading and writing functionality.
Innovation Solution
The information processing device is designed with a metal screw positioned on the side of the antenna board, not overlapping with it, and uses a spacer and control board to securely fasten the antenna board to the case, ensuring the screw does not obstruct communication between the medium and the antenna.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metal screw is used to fix the antenna board to the case, then the antenna board can be securely fixed, but the metal screw may interfere with communication between the medium and the antenna
Solution Approach 1:
The screw is extracted from its conventional position between the medium and antenna, and relocated to the opposite side of the antenna board. This removes the harmful factor (metal screw) from the communication path while preserving its fixing function through the spacer mechanism
Solution Approach 2:
A spacer is introduced as an intermediary component between the screw and the antenna board. The spacer allows the metal screw to fix the antenna board securely while preventing direct contact between the screw and the antenna board, thereby eliminating communication interference
2Strength
If the screw is positioned on the first side of the antenna board (between medium and antenna), then the antenna board can be fixed to the case, but communication sensibility deteriorates
Solution Approach 1:
Instead of positioning the screw on the conventional first side (between medium and antenna), the invention inverts the arrangement by placing the screw on the second side of the antenna board. This inversion resolves the contradiction by eliminating communication interference while maintaining fixation strength through the spacer
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 reduces the influence of the metal screw on communication, allowing for improved communication sensibility between the medium and the antenna, while maintaining secure fixation of the antenna board.
Implementation Method 1
an information processing device which performs communication by electromagnetic induction with a medium such as a smart phone having a short-range wireless communication (NFC; Near Field Communication) function
Data Source
AI summary
An information processing device for performing communication with a medium in a non-contact manner includes a case having a first face part to which a medium is brought close, an antenna board which faces the first face part and includes an antenna for communicating with the medium, and a metal screw which is fastened to a screw hole formed in the case to fix the antenna board to the case. In an arrangement direction in which the first face part and the antenna board are arranged, when a side where the first face part is located is a first side, and a side where the antenna board is located is a second side, the screw is located on the second side with respect to the antenna board and, when viewed in a direction perpendicular to the arrangement direction, the screw is not overlapped with the antenna board.