Cooler Bag Arc-Shaped Zipper Pull for Easier Operation

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Solution Overview

Problem

The existing ice bags face issues with difficult zipper operation, thermal insulation leakage, poor force-bearing capacity, and inefficient space utilization.

Innovation Solution

The ice bag design features an arc-shaped zipper pull, angled zipper tail, protruding and concave portions for sealing, double-layer straps, and optimized cotton fit to enhance ease of use, thermal insulation, and structural integrity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a standard zipper pull is used, then the structure is simple, but the zipper is difficult to pull

Engineering Contradiction:

Improvezipper operationVSAvoidzipper pull structure

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The zipper pull is designed with a curved arc shape that conforms to the natural curvature of human fingers. This curved geometry allows the finger to apply force more effectively across the zipper pull surface, reducing the effort needed to open the zipper while maintaining structural simplicity

Inventive Principle:

Principle #14Spheroidality (Curvature)

2Reliability

If the zipper is made tight for airtightness, then sealing is improved, but thermal insulation is compromised due to seam formation

Engineering Contradiction:

ImproveairtightnessVSAvoidthermal insulation

Core Design Contradiction:

ReliabilityVSTemperature

Solution Approach 1:

Thermal insulation cotton is strategically positioned and thickened at the zipper seam location to provide localized thermal insulation enhancement. This ensures that the tight zipper closure maintains both airtightness and thermal insulation by addressing the heat leakage issue specifically at the seam area

Inventive Principle:

Principle #3Local quality

3Temperature

If thermal insulation cotton is added to cover the zipper area, then thermal insulation is improved, but the cotton does not fit properly at the zipper position

Engineering Contradiction:

Improvethermal insulationVSAvoidcotton fit

Core Design Contradiction:

TemperatureVSManufacturing precision

Solution Approach 1:

The thermal insulation cotton is designed with variable thickness, being specifically thickened at the zipper location to ensure proper fit and coverage. This localized thickness adjustment allows the cotton to conform to the zipper seam area, providing effective thermal insulation without compromising the overall structure

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The thermal insulation cotton is pre-positioned and secured at the zipper area before final assembly. This preliminary placement ensures that the cotton properly covers the zipper seam and maintains thermal insulation effectiveness throughout the product lifecycle

Inventive Principle:

Principle #10Preliminary action

4Strength

If the handle is reinforced with bar-tack, then force-bearing capacity is improved, but the overall weight increases

Engineering Contradiction:

Improvehandle force-bearing capacityVSAvoidice bag weight

Core Design Contradiction:

StrengthVSWeight of moving object

Solution Approach 1:

Bar-tack reinforcement is pre-applied at the handle attachment points during manufacturing. This preliminary reinforcement ensures that the handle can bear required forces without adding excessive weight, as the reinforcement is applied only where structurally necessary rather than throughout the entire handle

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20250282534A1Cooler bag

Publication Date: 2025.09.11 XIAMEN SKYWALKER TECH CO LTD

AI summary

A cooler bag, comprising: a box body (2) and a cover body (1). The box body (2) and the cover body (1) are connected by means of a zipper (3). The zipper (3) is provided with a pull tab (31). A portion of the pull tab (31) in contact with fingers of a user is arc-shaped.