Rucksack Support Structure with Inverted Rotation Coupling

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Solution Overview

Problem

Existing support structures for rucksacks require the wearer to expend energy to work against the restoring force, reducing wearing comfort.

Innovation Solution

A support structure with rotationally coupled shoulder and hip belts that reverse the direction of rotation, accommodating the opposing movements of the pelvis and shoulder girdle, allowing for comfortable and efficient load distribution.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the hip belt and shoulder belts are rotatably fastened to a support framework with a restoring force, then the wearing comfort is increased compared to rigid structures, but the wearer has to expend energy to work against the restoring force

Engineering Contradiction:

Improvewearing comfortVSAvoidenergy expenditure by wearer

Core Design Contradiction:

Ease of operationVSUse of energy by moving object

Solution Approach 1:

The patent inverts the rotation direction coupling between hip belt and shoulder belts. Instead of both belts rotating in the same direction (which would create resistance), the hip belt rotates in the opposite direction to the shoulder belts. This inversion allows the belts to move with the body's natural motion during walking without creating opposing restoring forces, thereby maintaining comfort while eliminating energy expenditure against the mechanism.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent implements a dynamic belt system where the rotation elements allow the hip belt and shoulder belts to move relative to the support framework. By coupling these rotation elements in opposite directions, the system dynamically adapts to the wearer's movements during walking, maintaining optimal positioning without requiring energy to overcome restoring forces.

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If the rotation elements are coupled to move in the same direction, then the structure is simpler, but it does not accommodate the opposing movements of pelvis and shoulder girdle during walking

Engineering Contradiction:

Improveadaptation to body movementsVSAvoidrotation coupling mechanism

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies the inversion principle by coupling the rotation elements such that they move in opposite directions. This is achieved through a mechanical coupling where rotation of one element in a given direction causes the other element to rotate in the opposite direction. This configuration perfectly matches the opposing movements of the pelvis and shoulder girdle during walking, providing superior adaptability while maintaining reasonable structural complexity.

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentUS10874198B2Support structure

Publication Date: 2020.12.29 MAMMUT SPORTS GROUP AG

AI summary

The present invention relates to a support structure for a rucksack, including a support framework having a first and a second bearing point arranged at a spacing from one another along a first direction, and a first and a second rotation element. The first rotation element is mounted on the support framework at the first bearing point and is rotatable about a first rotation axis and the second rotation element is mounted on the support framework at the second bearing point and is rotatable about a further rotation axis. The first and second rotation elements are constructed for receiving a shoulder belt and hip belt, respectively, in a torsion-resistant manner. The first and the second rotation element are rotationally coupled to one another in a manner reversing the direction of rotation.