Variable Strap Bag with Integrated Guide and Fastener

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Solution Overview

Problem

Conventional bags often limit carrying options to only two configurations (handbag or shoulder bag) and require additional, detachable straps that can be lost or cumbersome, with unclear attachment methods, and unused straps may hang down or obstruct the bag's opening.

Innovation Solution

A bag design featuring two carrying elements with a guiding element on the side and a fastening element on the underside, allowing for variable configurations between handbag, shoulder bag, and backpack, with integrated strap management to prevent hanging and enhance usability, using materials like leather, imitation leather, fabric, or plastic, and incorporating holding elements such as snap fasteners or Velcro for secure attachment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If completely detachable straps are used to enable backpack carrying option, then carrying versatility is improved, but strap reliability is worsened due to risk of loss

Engineering Contradiction:
Improvecarrying versatilityVSAvoidstrap retention
Core Design Contradiction:
Adaptability or versatilityVSReliability

Solution Approach 1:

The patent merges the detachable strap system with the bag body by integrating attachment points directly into the bag structure. The straps remain detachable for versatility but are permanently associated with the bag through integrated attachment mechanisms, eliminating the risk of complete loss.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The attachment points are designed to serve multiple functions: they anchor the straps to the bag body, provide adjustment capabilities, and enable different carrying configurations (handbag, shoulder bag, backpack) using the same integrated structure.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If numerous attachment points are provided for strap positioning, then carrying versatility is improved, but device complexity is worsened making it unclear where to attach

Engineering Contradiction:
Improvestrap positioning optionsVSAvoidattachment point configuration
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

Different attachment points are positioned at specific locations on the bag body (front, back, sides) to create distinct carrying configurations. Each location serves a specific purpose, making the system intuitive despite having multiple options.

Inventive Principle:
Principle #3Local quality

3Adaptability or versatility

If long straps are used to enable backpack carrying, then carrying versatility is improved, but ease of operation is worsened when not in use as straps hang down or obstruct opening

Engineering Contradiction:
Improvecarrying configuration optionsVSAvoidaccess to bag opening
Core Design Contradiction:
Adaptability or versatilityVSEase of operation

Solution Approach 1:

The strap system is segmented into adjustable sections with attachment points distributed along the strap length and on the bag body. This allows the strap to be configured at different lengths and positions, enabling it to be tucked away or positioned out of the way when not needed for carrying.

Inventive Principle:
Principle #1Segmentation

4Adaptability or versatility

If additional detachable straps are carried separately to accommodate various carrying options, then carrying versatility is improved, but loss of substance is worsened due to risk of losing extra straps

Engineering Contradiction:
Improvecarrying option flexibilityVSAvoidstrap loss
Core Design Contradiction:
Adaptability or versatilityVSLoss of substance

Solution Approach 1:

The bag incorporates multiple attachment points and a single strap system that can be configured for different carrying modes. This eliminates the need for separate additional straps, as the same strap can be reconfigured multiple times using the integrated attachment points on the bag body.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentEP3479722B1Bag
Publication Date: 2020.09.16 DI TOMMASO CLAUDIA ANNA MARIA
  • EP3479722B1 patent drawingFigure 1
  • EP3479722B1 patent drawingFigure 2a~2b
  • EP3479722B1 patent drawingFigure 2c~2d

AI summary

The present invention relates to a bag in which the carrying elements are arranged variably, so that the bag can be used as a backpack, handbag or shoulder bag.