Tool Container Magnetic Lid Retention for Repeated Tool Access

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Solution Overview

Problem

Conventional tool bags with fabric lids tend to automatically return to the closed position after each cycle of opening, making repeated lifting and holding of the lid tiresome or annoying, especially when multiple tool entries are required.

Innovation Solution

A tool container with a magnetic retention assembly that holds the lid in an opened or closed position using magnetic strips attached to the lid and handle assembly, allowing for easy manipulation and retention without the need for additional closure mechanisms.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Weight of moving object

If a fabric lid is used on a tool bag, then the lid is lightweight and durable, but the lid automatically returns to the closed position requiring repeated lifting and holding

Engineering Contradiction:

Improvelid weightVSAvoidlid manipulation ease

Core Design Contradiction:

Weight of moving objectVSEase of operation

Solution Approach 1:

The patent replaces the mechanical spring mechanism with a magnetic retention assembly. The magnetic strips or magnets provide the holding force to keep the lid open, eliminating the need for continuous manual pressure or complex mechanical springs while maintaining lightweight construction.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The magnetic retention assembly acts as an intermediary force between the lid and the user. Instead of the lid naturally returning to closed position due to spring force, the magnetic field serves as an intermediate holding mechanism that requires no continuous user input to maintain the open position.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If a magnetic retention assembly is added to hold the lid open, then lid retention is improved, but device complexity increases

Engineering Contradiction:

Improvelid retention easeVSAvoidcontainer structure complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent extracts the retention function from the main body of the container and places it in the lid assembly itself. The magnetic strips are integrated into the lid or handle assembly, separating the retention mechanism from the container structure and minimizing overall complexity.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The magnetic retention assembly serves multiple functions: it holds the lid open during use, and can also assist in closing the lid when pulled. This multi-functionality reduces the need for separate mechanisms and minimizes overall device complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 magnetic retention assembly effectively maintains the lid in the desired position, enhancing user convenience and reducing the effort required to keep the lid open or closed, thereby improving user satisfaction.

Implementation Method 1

a magnetic retention assembly configured to hold the lid proximate to the handle assembly to retain the lid in an opened position

Methodology Applied

Scientific EffectMagnetic attraction: Magnetism

Data Source

PatentUS12440960B2Tool container with magnetic retention assembly for lid

Publication Date: 2025.10.14 APEX BRANDS INC

AI summary

A tool container may include a container portion that includes a front wall, sidewalls, and a rear wall. The tool container may further include a lid hingedly attached to the rear wall, a mobility assembly including wheels and a handle assembly, and a magnetic retention assembly configured to hold the lid proximate to the handle assembly to retain the lid in an opened position.