Card Holder with Moisture Barrier for RFID Tags
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Solution Overview
Problem
RFID communication is affected by moisture interference when RFID tags are close to the human body, leading to inaccurate data transmission between tags and readers.
Innovation Solution
A card holder design with integrally formed sleeves and a clip system that maintains the RFID tag perpendicular to the body, minimizing moisture interference, and is made of inexpensive, lightweight materials to reduce manufacturing costs and prevent accidental tag loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the RFID tag is placed close to the body for convenient carrying, then the ease of operation is improved, but the communication reliability deteriorates due to moisture interference
Solution Approach 1:
The patent introduces a moisture barrier layer as an intermediary between the RFID tag and the human body. This layer physically separates the tag from moisture sources (sweat, skin humidity) while allowing the tag to remain conveniently attached to the body, thus resolving the contradiction between carrying convenience and communication reliability
Solution Approach 2:
The moisture barrier is implemented as a flexible thin film or coating that conformally covers the RFID tag. This flexible shell protects the tag from moisture interference while maintaining the ability to attach closely to the body surface, achieving both reliability and ease of operation
2Reliability
If a protective structure is added to shield the RFID tag from moisture, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The moisture barrier function is merged with the existing card holder structure rather than being a separate component. The barrier is integrated into the card holder material or applied as a coating on the tag, combining protection with the carrying structure to avoid increasing overall device complexity
Solution Approach 2:
A thin flexible moisture barrier film is used instead of bulky protective structures. This thin film provides adequate moisture protection while adding minimal structural complexity, maintaining the simplicity of the overall card holder design
3Reliability
If expensive or heavy materials are used to create an effective moisture barrier, then the reliability is improved, but the manufacturing cost and weight increase
Solution Approach 1:
The moisture barrier is implemented as a thin film or coating rather than thick expensive materials. This approach provides effective moisture protection while using minimal material, reducing both cost and weight compared to bulk protective materials
Solution Approach 2:
The card holder uses composite construction combining different materials with complementary properties. A moisture-resistant material layer is combined with the card holder substrate, creating effective protection through material composition rather than relying on expensive single-material solutions
Data Source
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AI summary
In accordance with an aspect of an embodiment, there is provided a card holder comprising: a first enclosed sleeve; a second enclosed sleeve; and a third enclosed sleeve comprising a third slit, the third enclosed sleeve coupled at opposite ends to the first enclosed sleeve and the second enclosed sleeve, and configured to receive a radio frequency identification (RFID) tag via the third slit; wherein in a closed position, an end of the first enclosed sleeve and an end of the second enclosed sleeve are proximal one another such that the card holder is substantially triangular in shape.