Back-Loaded System Module With Pivotable Hip Portion

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Solution Overview

Problem

Existing back-carried system modules face challenges in achieving uniform load transfer to the user's back and reliable upright positioning on a surface without restricting movement.

Innovation Solution

The system module incorporates a pivotable hip portion extending from the back panel, allowing load distribution to the hips and enabling the module to be set down upright without obstruction, using a textile hinge for pivoting and a water-repellent cover for protection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Force

If the back panel is extended by a fixed hip portion to transfer load to the user's hips, then load distribution is improved, but the system module cannot be reliably set down in an upright position

Engineering Contradiction:

Improveload distributionVSAvoidupright setting down

Core Design Contradiction:

ForceVSEase of operation

Solution Approach 1:

The hip portion is made pivotable relative to the back panel about a movement axis, allowing it to change position between a carrying state (projecting beyond the stand surface) and a storage state (folded up above the stand surface). This dynamic configuration enables the hip portion to transfer load to the user's hips during carrying while being folded up during upright storage to avoid obstruction.

Inventive Principle:

Principle #15Dynamics

2Force

If the hip portion projects beyond the stand surface to provide carrying support, then load transfer to hips is improved, but the stand surface cannot contact the ground reliably

Engineering Contradiction:

Improvehip load transferVSAvoidstand surface contact

Core Design Contradiction:

ForceVSReliability

Solution Approach 1:

The pivotable connection between the hip portion and back panel allows the hip portion to be positioned in a folded-up state during storage, ensuring the stand surface can reliably contact the ground. During carrying, the hip portion projects beyond the stand surface to provide hip support, thus resolving the contradiction between reliable ground contact and effective load transfer.

Inventive Principle:

Principle #15Dynamics

3Adaptability or versatility

If the movement axis is exposed to allow hip portion pivoting, then freedom of movement is improved, but the system module becomes vulnerable to damage during upright storage

Engineering Contradiction:

Improvepivoting freedomVSAvoidground contact damage

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The movement axis is covered by the system module itself, which supports the hip portion in the folded-up position during storage. This covering protects the movement axis from ground contact damage while still allowing the hip portion to pivot freely between carrying and storage positions.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS10080418B2System module which can be carried on the back and has a carrying arrangement and a fold-down hip portion

Publication Date: 2018.09.25 ANDREAS STIHL AG & CO KG

AI summary

The invention relates to a system module, which is carried on the back, for a work tool. The system module has a stand surface for setting down the system module in an upright manner. A carrying arrangement for the system module has at least one back panel and at least one shoulder strap. The back panel is formed with an upper shoulder portion and with a lower back portion. The back panel is extended beyond the back portion by a hip portion. The hip portion can be pivoted relative to the back portion about a movement axis. The movement axis extends at the level of the stand surface of the system module.