Power Converter Accessory Storage for Travel Cable and SIM Management

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Solution Overview

Problem

The inconvenience caused by the need for different power converters and multiple adapters for plugs and sockets in different countries, along with the hassle of changing calling cards and mobile phone charging cables during travel, leads to difficulties in international travel.

Innovation Solution

A multifunctional accessory storage structure for power converters that integrates a data cable, data adapter, SIM phone card, and phone card thimble, allowing them to be stored separately or combined on the side of the power converter, with a cover to prevent loss and facilitate easy access.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple separate tools are carried for power conversion, data cable management, SIM card handling, and charging cable adaptation, then each function can be performed independently, but the total number of items to carry increases and travel convenience deteriorates

Engineering Contradiction:
Improvefunctional versatilityVSAvoidnumber of accessories
Core Design Contradiction:
Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

The patent combines multiple travel accessories (power converter, data cable winder, SIM card thimble, charging cable adapter) into a single integrated power converter device. The data cable winding mechanism, SIM card storage compartment, and charging cable adapter are all merged into the power converter body, allowing travelers to perform multiple functions with one device rather than carrying separate tools for each function.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The power converter is designed with universal functionality to perform multiple tasks: power conversion for different plug types, data cable winding and storage, SIM card insertion and ejection, and charging cable adaptation. This multi-functional design eliminates the need for multiple specialized tools, directly resolving the contradiction between functional versatility and the number of accessories to carry.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Ease of operation

If accessories are stored separately in multiple containers, then each accessory is easily accessible, but the total carrying space required increases

Engineering Contradiction:
ImproveaccessibilityVSAvoidcarrying space
Core Design Contradiction:
Ease of operationVSVolume of moving object

Solution Approach 1:

The patent employs a nested structure where the data cable is wound around a spool that is integrated into the power converter body. The SIM card thimble is nested within the power converter, and the charging cable adapter is housed within the same device. This nesting approach allows multiple accessories to be stored within the volume of a single power converter, dramatically reducing the total carrying space required while maintaining easy accessibility through dedicated openings and mechanisms.

Inventive Principle:
Principle #7Nested doll (Nesting)

3Volume of moving object

If a compact power converter is designed, then portability is improved, but the space available for integrating additional functions is reduced

Engineering Contradiction:
Improvedevice sizeVSAvoidintegrated functionality
Core Design Contradiction:
Volume of moving objectVSAdaptability or versatility

Solution Approach 1:

The patent utilizes three-dimensional space efficiently by implementing vertical stacking and multi-level integration within the power converter body. The data cable winding mechanism, SIM card compartment, and charging cable adapter are arranged in different spatial dimensions and layers, maximizing the use of available internal volume. This dimensional optimization allows multiple functions to be integrated into a compact form factor without compromising portability.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The power converter incorporates dynamic elements such as the rotatable data cable spool and movable SIM card ejection mechanism that can be actuated by the user. These dynamic features allow the accessories to be accessed and used without permanently increasing the device's external dimensions, maintaining a compact form factor while providing versatile functionality when needed.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentEP4579960A1Multifunctional accessory storage structure for power converter
Publication Date: 2025.07.02 DONGGUAN BEST TRAVEL ELECTRONICS CO LTD
  • EP4579960A1 patent drawingFigure 1
  • EP4579960A1 patent drawingFigure 2~3
  • EP4579960A1 patent drawingFigure 4~5

AI summary

The invention discloses a multifunctional accessory accommodating structure for a power converter, which comprises a placing groove formed on the side of the power converter and a functional component, wherein the functional component comprises any one or a combination of the following: a data cable, a data adapter, a SIM phone card, a phone card thimble. A data line, a data line adapter, a SIM phone card and a phone card thimble can be accommodated on the side of the power converter, and each of them can be separately accommodated on the side of the power converter for use, and can also be freely combined, placed and taken for use. The data cable, the data cable adapter, the SIM phone card and the phone card thimble are accommodated at the side of the power converter, so that people can carry things conveniently, do not need to occupy extra space, are convenient to travel and use, and improve the practicability of the power converter.