RFID-Blocking Wallet Shell With Sliding Rails for Slim Card Retention

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional wallets are bulky due to multiple layers of material, leading to an uncomfortable bulge when carried, and are prone to stretching and card loss, with inadequate security against RFID theft.

Innovation Solution

A wallet design featuring a first shell with openings for clipping objects and a second shell with a storage compartment and sliding rails for secure card retention, incorporating CNC machined aluminum and anodized materials with RFID-blocking properties, and a multi-tool for emergency functions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If multiple compartments and layers of material are used to hold cards and currency, then the wallet can carry more items, but the wallet becomes bulky and creates an uncomfortable bulge when carried

Engineering Contradiction:

Improvenumber of cards and itemsVSAvoidwallet thickness

Core Design Contradiction:

Quantity of substanceVSVolume of moving object

Solution Approach 1:

The wallet is divided into multiple functional compartments including card slots, currency compartment, and ID window, each optimized for specific items. This segmentation allows efficient organization of multiple items within a compact overall structure, preventing bulk while maintaining capacity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The wallet employs nested compartments where card slots are positioned within the main body, currency is stored in an inner compartment, and the ID window is integrated into the front section. This nesting arrangement maximizes storage capacity without increasing external dimensions.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Reliability

If fabric and leather materials are used and sewn to form storage pockets, then the wallet can hold items securely, but the wallet stretches and becomes loose over time, leaving cards vulnerable to falling out

Engineering Contradiction:

Improvecard retention securityVSAvoidwallet shape stability

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The wallet combines full-grain leather with reinforced stitching patterns and internal structural elements. The leather provides durability and gradual molding to the user's shape, while the reinforced construction prevents excessive stretching and maintains structural integrity over time.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The wallet incorporates pre-stitched reinforcement zones in high-stress areas and internal structural supports that prevent future stretching and deformation. This preemptive reinforcement ensures long-term shape stability and card retention security.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Ease of manufacture

If a clip with spring tension is used to hold cards and currency, then the wallet can hold items without fabric or leather, but the spring tension limits the maximum amount of cards a user can carry

Engineering Contradiction:

Improvesimplified constructionVSAvoidnumber of cards

Core Design Contradiction:

Ease of manufactureVSQuantity of substance

Solution Approach 1:

Instead of relying on a single clip mechanism, the wallet segments card storage into multiple dedicated slots and compartments. This segmentation allows cards to be held through distributed structural support rather than concentrated spring tension, significantly increasing card capacity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The design replaces the spring-tension clip mechanism with a structured compartmental system using rigid walls, reinforced edges, and precise stitching. This substitution eliminates the card-limiting spring tension while maintaining secure holding through structural integrity.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

4Ease of manufacture

If conventional clip-based holders are used, then cards can be held without fabric or leather, but personal credit cards and security cards are vulnerable to RFID theft

Engineering Contradiction:

Improvesimplified constructionVSAvoidRFID theft vulnerability

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The wallet incorporates RFID-blocking material integrated into the leather construction, creating a composite structure that maintains the aesthetic and tactile qualities of leather while providing electromagnetic shielding against RFID theft.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

An RFID-blocking layer is introduced as an intermediary between the cards and external electromagnetic fields. This protective barrier intercepts and blocks radio frequency signals, preventing unauthorized reading of card information while allowing the wallet to maintain its simplified clip-based or structured design.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20240389724A1wallet

Publication Date: 2024.11.28 CTB HOLDINGS LLC

AI summary

A wallet includes a first shell with one or more openings on a shell perimeter adapted to clip one or more objects to the one or more openings; and a second shell coupled to the first shell, the second shell including a storage compartment; and first and second rails on each side of the second metal shell to slideably receive one or more cards in the storage compartment.