Backpack Shoulder Strap Leveling Structure

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Solution Overview

Problem

Existing backpacks often fail to distribute the weight of their contents evenly across the user's shoulders and back, leading to discomfort and strain.

Innovation Solution

The backpack incorporates a shoulder strap leveling structure, which includes a slip lock member and a bulk strap with markings, allowing for precise adjustment of the strap lengths to ensure even distribution of the backpack's weight.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If fixed-length shoulder straps are used, then the backpack structure is simple, but the weight distribution is uneven causing discomfort

Engineering Contradiction:

Improveweight distributionVSAvoidstrap structure

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The shoulder strap system transitions from fixed-length to adjustable-length through the bulk strap and slip lock mechanism, allowing dynamic adaptation to different user needs and weight distributions, thereby resolving the contradiction between simplicity and comfort

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The shoulder strap is divided into multiple segments: a fixed first section attached to the backpack, an adjustable bulk strap section with markings, and a slip lock mechanism. This segmentation enables independent adjustment of strap length while maintaining structural integrity

Inventive Principle:

Principle #1Segmentation

2Ease of operation

If adjustable shoulder straps are added, then weight distribution improves, but the device complexity increases

Engineering Contradiction:

Improvestrap adjustmentVSAvoidleveling structure

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The slip lock mechanism enables users to independently adjust and lock the bulk strap length without requiring tools or assistance, allowing self-service adjustment while keeping the overall system relatively simple

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system allows adjustment of the strap length parameter through the bulk strap, and includes markings to indicate different length settings, enabling users to change the parameter to achieve optimal weight distribution

Inventive Principle:

Principle #35Parameter changes

3Manufacturing precision

If precise strap length adjustment is implemented, then alignment and balancing improve, but manufacturing complexity increases

Engineering Contradiction:

Improvestrap length precisionVSAvoidproduction process

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

Markings are pre-positioned on the bulk strap at specific intervals during manufacturing, and the slip lock mechanism is pre-configured with a window aligned to these markings, enabling precise adjustment without requiring complex calibration during use

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Visual markings (which may involve color or pattern changes) are incorporated on the bulk strap to indicate different length settings, providing clear visual feedback during adjustment while being simple to manufacture through printing or fabric placement

Inventive Principle:

Principle #32Color changes

Data Source

PatentUS20250113912A1Backpack with leveling structure

Publication Date: 2025.04.10 UNDER ARMOUR INC

AI summary

A backpack includes a main body including a front side and a rear side, a pair of shoulder straps, each shoulder strap extending from a first fixed end at an upper portion of the rear side to a second free end, and a shoulder strap leveling structure coupled with each of the shoulder straps. Each shoulder strap leveling structure is coupled with a corresponding shoulder strap and includes a slip lock member disposed along a portion of the corresponding shoulder strap, and a bulk strap including a first end coupled with the rear side of the backpack and a second free end that is moved through a slot of the slip lock member. Each bulk strap also includes a plurality of markings arranged along a length dimension of the bulk strap that are visible through a window of the slip lock member.