Card Reader Foreign Matter Discharge via Segmented Airtight Chamber

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Solution Overview

Problem

Conventional card readers with airtight structures face difficulties in discharging foreign matters during maintenance without unintended release, as existing solutions do not effectively manage the discharge of accumulated debris.

Innovation Solution

A card reader design featuring a card accommodating part with an insertion port and a discharge hole, along with a detachable foreign matter accommodation member that forms an airtight space with the card accommodating part, allowing for easy discharge of foreign matters while preventing unintended release.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If an airtight structure is provided in a card reader to prevent foreign matter from being released, then foreign matter containment is improved, but foreign matter discharge during maintenance becomes difficult

Engineering Contradiction:

Improveforeign matter containmentVSAvoidforeign matter discharge

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The card accommodating part is divided into a sealed chamber and a discharge path. The airtight structure contains the majority of the space while the discharge hole provides a segmented escape route for foreign matters, allowing maintenance without compromising the overall containment integrity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A discharge hole acts as an intermediary element between the sealed card accommodating part and the external environment. This intermediary structure enables controlled discharge of foreign matters during maintenance while the airtight structure prevents unintended release during normal operation.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If an airtight structure is provided in a card reader to prevent foreign matter from being released, then foreign matter containment is improved, but unintended foreign matter release is prevented

Engineering Contradiction:

Improveforeign matter containmentVSAvoidairtight structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The airtight structure is implemented as a localized sealed chamber around the card accommodating part rather than enclosing the entire card reader. This segmented approach prevents foreign matter release while minimizing the complexity of the airtight structure to only where it is most needed.

Inventive Principle:

Principle #1Segmentation

3Ease of operation

If a discharge hole is provided to discharge foreign matters, then foreign matter discharge is improved, but foreign matter may be released into other devices

Engineering Contradiction:

Improveforeign matter dischargeVSAvoidforeign matter release to other devices

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The airtight structure serves as an intermediary barrier between the discharge hole and the external environment. Foreign matters are discharged through the hole but contained within the sealed chamber, preventing them from entering other devices mounted on the host apparatus.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The foreign matter is extracted from the card accommodating part through the discharge hole and contained within the sealed chamber. This extraction process removes the harmful element from the operational path while the airtight structure ensures it cannot spread to other devices.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS12260282B2Card reader

Publication Date: 2025.03.25 NIDEC INSTR CORP

AI summary

A card reader includes a card accommodating part which has an insertion port into which a card is inserted, accommodates at least a part of the card having been inserted, and has a discharge hole which is capable of discharging a foreign matter in an inside of the card accommodating part, and a foreign matter accommodation member which accommodates the foreign matter discharged through the discharge hole and is capable of being attached and detached. The foreign matter accommodation member structures an airtight space together with the card accommodating part, and the airtight space is airtight in a portion at least except the insertion port.