Card Discharge Device for Electrostatic Error Prevention

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Solution Overview

Problem

Existing card readers, particularly in the health sector, experience errors due to electrostatic charging of chip cards, leading to system crashes when charges dissipate on the reader, causing reading failures and infrastructure disruptions.

Innovation Solution

A passive, non-invasive card discharge device with an electrically conductive surface and a grounding mechanism using a USB plug, where a copper cable is soldered to the USB plug's outer shell to transfer charges to ground, ensuring cards can be read without active electronics interfering with the card reader.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a card reader is used to read chip cards, then card reading functionality is provided, but electrostatic charges on the cards cause errors and system crashes

Engineering Contradiction:

Improvecard reading functionalityVSAvoidsystem stability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The discharge device is positioned at the card insertion slot to perform electrostatic discharge on the card before it is fully inserted into the card reader. This preliminary action removes the harmful electrostatic charge that would otherwise cause reading errors or system crashes, allowing reliable card reading without interfering with the card reader's operation.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If discharge devices are added to dissipate electrostatic charges, then electrostatic discharge capability is improved, but device complexity increases

Engineering Contradiction:

Improveelectrostatic discharge capabilityVSAvoiddevice structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The discharge device is designed to be integrated with the card reader's existing housing and insertion slot structure. The same housing that guides the card insertion also houses the discharge elements, and the card insertion motion itself drives the discharge process. This multi-functionality avoids adding separate complex discharge mechanisms while still providing effective electrostatic discharge capability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If discharge elements are placed along the thrust plane, then electrostatic charge dissipation is improved, but interference with card reader operation may occur

Engineering Contradiction:

Improvecharge dissipation effectivenessVSAvoidinterference with card reader

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The discharge elements are positioned to contact the card's thrust plane (the surface that contacts the insertion slot), which acts as an intermediary between the discharge device and the card reader's internal components. The card itself serves as the mediator, receiving the discharge at its surface and then being inserted into the reader without the harmful charge, thus preventing interference with the reader's operation.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The discharge elements are specifically positioned to contact only the thrust plane region of the card that is exposed at the insertion slot. This localized discharge approach targets only the necessary area for charge dissipation while avoiding placement of discharge elements inside the card reader's operational area, thus preventing interference with reading operations.

Inventive Principle:

Principle #3Local quality

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 device effectively dissipates electrostatic charges on cards before insertion, preventing reading errors and maintaining system stability without disrupting the telematics infrastructure.

Implementation Method 1

at least one grounded and/or to be grounded electrically conductive discharge element (10) by means of which electrostatic charges on the surface of a card (2) are discharged

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Implementation Method 2

electrostatic charges on the surface of a card (2) are discharged

Methodology Applied

Scientific EffectElectrostatic discharge: Electrostatic Discharge

Data Source

PatentEP4254257B1Device for discharging electrostatically charged cards

Publication Date: 2024.10.16 RIEGRAF MAXIMILIAN

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Figure 2

AI summary

The present invention relates to a device (1) for discharging electrostatically charged cards (2), comprising at least one grounded and/or groundable electrically conductive discharge element (10) by means of which electrostatic charges are dissipated from the surface of a card (2). The device (1) according to the invention is characterized in that it comprises a housing (12) in which at least one slot-shaped opening (11) is provided for inserting and/or pushing a card (2) along one or more thrust planes (E) defined by the slot-shaped opening (11), wherein the at least one discharge element (10) is arranged and/or aligned in one or more regions (B) along the at least one thrust plane (E) to dissipate electrostatic charges in one or more regions (B) of the thrust plane (E).