Inflatable Bag Structure for Adjustable Firmness and 3D Shape

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing bags lack the ability to adjust their firmness according to different usage scenarios, with soft fabrics failing to maintain a three-dimensional shape and rigid fabrics increasing weight and storage difficulty.

Innovation Solution

A bag with adjustable firmness featuring an inflatable airbag system, including multiple airbags and inflation/deflation ports, allowing for controlled firmness adjustment through inflation and deflation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Weight of moving object

If soft fabric is used for the bag body, then the bag is easy to store and lightweight, but the bag cannot maintain a three-dimensional shape and stand upright

Engineering Contradiction:

Improvebag weightVSAvoidthree-dimensional shape

Core Design Contradiction:

Weight of moving objectVSShape

Solution Approach 1:

The patent applies pneumatic principles by incorporating an inflatable airbag into the bag body. The airbag can be inflated to provide internal support that maintains the bag's three-dimensional shape and enables it to stand upright, while deflated it remains lightweight and easy to store. This pneumatic support system resolves the contradiction between maintaining shape and minimizing weight.

Inventive Principle:

Principle #29Pneumatics and hydraulics

2Shape

If rigid fabric is used for the bag body, then the bag can maintain a three-dimensional shape and stand upright, but the bag weight increases and becomes difficult to store

Engineering Contradiction:

Improvethree-dimensional shapeVSAvoidbag weight

Core Design Contradiction:

ShapeVSWeight of moving object

Solution Approach 1:

The patent employs dynamic principles by making the bag's structural support adjustable rather than fixed. The airbag can be inflated or deflated based on usage requirements, allowing the bag to transition between maintaining a rigid three-dimensional shape and becoming lightweight and flexible for storage. This dynamic adjustment resolves the contradiction between shape maintenance and weight reduction.

Inventive Principle:

Principle #15Dynamics

3Shape

If rigid fabric is used for the bag body, then the bag can stand upright and maintain structure, but the bag becomes difficult to store when not in use

Engineering Contradiction:

Improvestructural stabilityVSAvoidstorage ease

Core Design Contradiction:

ShapeVSEase of operation

Solution Approach 1:

The patent applies dynamic principles by enabling the bag structure to change state based on usage needs. When not in use, the airbag can be deflated to make the bag soft and easy to store; when needed, it can be inflated to provide structural stability. This dynamic transformation resolves the contradiction between structural stability and storage ease.

Inventive Principle:

Principle #15Dynamics

4Ease of manufacture

If the bag body firmness is fixed, then the manufacturing process is simple, but the bag cannot adapt to different usage scenarios

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidusage scenario adaptability

Core Design Contradiction:

Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The patent applies universality by designing the bag with an adjustable firmness feature that enables it to serve multiple usage scenarios. The airbag system allows the bag to adapt to different conditions - providing structure when needed and becoming flexible for storage when not needed - thereby resolving the contradiction between manufacturing simplicity and usage adaptability.

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 bag achieves a structured, three-dimensional shape when inflated and softens for easier storage when deflated, adapting to various usage needs.

Implementation Method 1

Inflating the airbag causes the airbag to expand, thereby increasing the firmness of the bag

Methodology Applied

Scientific EffectGas expansion:

Implementation Method 2

Deflating the airbag allows the airbag to contract, reducing the firmness of the bag

Methodology Applied

Scientific EffectGas compression:

Data Source

PatentUS20260048905A1Bag with adjustable firmness and using method thereof

Publication Date: 2026.02.19 LI WENJIE

AI summary

A bag with adjustable firmness and a using method thereof, which relate to the field of travel goods. The bag includes a bag body and an inflatable airbag. An airbag accommodating space is arranged around an inner side of the bag body. The inflatable airbags are arranged in the airbag accommodating space and around the inner side of the bag body in a circle with space between each other. Inflation of the airbag increases the firmness of bag panel to achieve structured and three-dimensional shape for the bag body. Deflation of the bag decreases the firmness of bag panel to allow bag body to be softer and easier to store. The expansion or contraction of airbag can adjust the firmness of bag body according to actual usage scenarios, solving the problem in conventional bags where flexibility and rigidity of fabric cannot be adjusted to suit different usage needs.