Convertible School Bag with Removable Reinforcement Plates

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Solution Overview

Problem

Existing school bags do not offer a convenient way to convert between a satchel and a backpack, limiting user preference based on the need for a stiffer or softer bag.

Innovation Solution

A school bag design that includes removable plate-shaped reinforcement elements, which can be inserted into slide-in pockets to convert the bag from a soft backpack to a stiffer satchel and vice versa, using Velcro or zip fasteners for closure and featuring a flexible or rigid cover flap with accessible external pockets.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If reinforcement elements are inserted into the slide-in pockets, then the bag becomes a stiffer satchel, but the bag loses flexibility and adaptability

Engineering Contradiction:

Improvestiffness of bag structureVSAvoidflexibility between satchel and backpack modes

Core Design Contradiction:

StrengthVSAdaptability or versatility

Solution Approach 1:

The bag structure is made dynamically adjustable through removable reinforcement elements that can be inserted or removed from slide-in pockets. This allows the bag to transition between stiff satchel mode and flexible backpack mode, resolving the contradiction between structural strength and adaptability.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The reinforcement function is segmented into separate removable elements rather than being integrated permanently into the bag structure. This segmentation enables selective insertion into slide-in pockets, allowing the user to adjust the stiffness level based on whether satchel or backpack configuration is desired.

Inventive Principle:

Principle #1Segmentation

2Ease of operation

If the bag is designed as a soft backpack, then comfort and flexibility are improved, but structural support and rigidity are reduced

Engineering Contradiction:

Improvecomfort and flexibilityVSAvoidstructural support

Core Design Contradiction:

Ease of operationVSStrength

Solution Approach 1:

The bag maintains a soft, flexible backpack structure by default for comfort, but can dynamically gain structural support when reinforcement elements are inserted. This dynamic adjustment resolves the contradiction between comfort and structural support.

Inventive Principle:

Principle #15Dynamics

3Strength

If the bag is designed as a rigid satchel, then structural support is improved, but comfort and flexibility are reduced

Engineering Contradiction:

Improvestructural supportVSAvoidcomfort and flexibility

Core Design Contradiction:

StrengthVSEase of operation

Solution Approach 1:

The bag can transition from a rigid satchel configuration to a flexible backpack configuration by removing reinforcement elements, allowing users to switch between structural support and comfort based on their needs.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The reinforcement elements can be extracted from the bag structure by removing them from the slide-in pockets, converting the rigid satchel into a flexible backpack and resolving the contradiction between structural support and comfort.

Inventive Principle:

Principle #2Taking out (Extraction)

4Adaptability or versatility

If removable reinforcement elements are added to enable conversion, then adaptability is improved, but device complexity increases

Engineering Contradiction:

Improveconversion between satchel and backpackVSAvoidnumber of components

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The reinforcement function is divided into separate modular elements that can be independently inserted or removed. This segmentation enables adaptability while keeping each individual component simple and the overall system manageable in complexity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The reinforcement elements serve multiple functions: they provide structural support when inserted, can be stored in the bag when not needed, and enable the conversion between satchel and backpack modes. This multi-functionality justifies the added components by providing versatile utility.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentEP3135152B1School backpack which can be converted into a school satchel and school satchel which can be converted into a school backpack

Publication Date: 2020.07.22 HAMA

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AI summary

School backpack (12), comprising a base (20), two flexible side outer walls (22, 24), a back wall (26) and a flexible front outer wall (32) as well as back carrying straps (28, 30), wherein at least one of the side outer walls (22, 24) and the front outer wall (32) has a slip pocket (38, 40, 44) for receiving at least one, preferably plate-shaped, reinforcing element (14, 16, 18) for conversion into a school satchel, and set (10) with the same and school satchel (12), comprising a base (20), two side outer walls (22, 24), a back wall (26) and a front outer wall (32) as well as back carrying straps (28, 30), wherein at least one of the side outer walls (22, 24) and the front outer wall (32) has a slip pocket (38, 40, 44) with at least one inserted, preferably has a plate-shaped, reinforcing element (14,16,18) which can be removed from the insert pocket (38,40,44) for the purpose of converting it into a school backpack.