Insulation Bag Magnetic Closure Eliminates Zipper Leakage

Solution Overview

Problem

Existing insulation bags suffer from poor sealing, complex operation, and reduced insulation effectiveness due to visible zippers, inconvenient operation, and flexible connections that are prone to damage.

Innovation Solution

The insulation bag employs a magnetic attraction mechanism using upper and lower edge loops with embedded magnetic elements, allowing for easy closure and improved sealing by engaging convex and concave parts, and further secures with fasteners and a sealing strip.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a zipper is used to close the main body and lid, then the bag can be opened and closed, but the zipper is visible from the outside affecting appearance, requires complex zipping/unzipping operation, and has poor sealing effect causing heat exchange and liquid leakage

Engineering Contradiction:

Improveclosure operationVSAvoidclosure structure

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent removes the zipper component entirely from the insulation bag design. Instead of using a traditional zipper mechanism for closure, the invention employs a magnetic attraction system where magnetic elements embedded in the lid and main body automatically attract and seal the bag when brought together, eliminating the need for manual zipping/unzipping operations and the associated structural complexity

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent replaces the mechanical zipper system with a magnetic field-based closure mechanism. Magnetic elements (such as magnetic strips or magnets) are embedded in the lid and corresponding positions in the main body, creating an automatic magnetic attraction seal that substitutes the manual mechanical interlocking action of a zipper with a magnetic force-based sealing system

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If a zipper is used to close the main body and lid, then the bag can be opened and closed, but the sealing effect is poor allowing heat exchange and liquid leakage

Engineering Contradiction:

Improvesealing performanceVSAvoidclosure operation

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent removes the zipper component entirely from the insulation bag design. Instead of using a traditional zipper mechanism for closure, the invention employs a magnetic attraction system where magnetic elements embedded in the lid and main body automatically attract and seal the bag when brought together, eliminating the need for manual zipping/unzipping operations and the associated structural complexity

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent replaces the mechanical zipper system with a magnetic field-based closure mechanism. Magnetic elements (such as magnetic strips or magnets) are embedded in the lid and corresponding positions in the main body, creating an automatic magnetic attraction seal that substitutes the manual mechanical interlocking action of a zipper with a magnetic force-based sealing system

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Strength

If the connection between main body and lid is flexible, then the bag is easy to open and close, but the connection is deformable or may be damaged under collision by outside force weakening structural strength

Engineering Contradiction:

Improvestructural strengthVSAvoidopening and closing

Core Design Contradiction:

StrengthVSEase of operation

Solution Approach 1:

The patent divides the closure system into distinct functional segments: magnetic elements for attraction and sealing, rigid edge loops for structural support, and flexible sealing strips for creating the seal. This segmentation allows each component to perform its specific function optimally - the rigid parts provide strength while the magnetic and sealing components enable easy operation

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies different material properties and structural characteristics to different parts of the closure system. The edge loops are made rigid for structural strength, the sealing strips are flexible for creating seals, and the magnetic elements provide automatic attraction. This local differentiation of properties allows the overall system to achieve both strength and ease of operation

Inventive Principle:

Principle #3Local quality

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

This design enhances sealing and insulation performance, reduces leakage risk, and simplifies operation by eliminating the need for zippers, while maintaining structural integrity and aesthetics.

Implementation Method 1

the first magnetic attractable elements and the second magnetic attractable elements attach to each other through magnetic attraction

Methodology Applied

Scientific EffectMagnetic attraction: Magnetism

Data Source

PatentUS12317988B2Insulation bag

Publication Date: 2025.06.03 XIAMEN GODZILLA IND & TRADE CO LTD

AI summary

An insulation bag includes a main body and a lid connectable to the main body. An upper part of the main body forms an opening, and the lid is attached to the opening to seal the insulation bag. A first connection element and a second connection element are respectively arranged on the main body and the lid, and the first connection element and second connection element are connected to each other by magnetic attraction or mechanical engagement which can get rid of the use of zipper, thereby simplifying the operation of opening and closing the insulation bag while improving the sealing performance and stability of connection.