Wearable Strap Fastening Layout for Adjustable Load Distribution

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Solution Overview

Problem

Existing fastening devices for wearable articles with shoulder straps suffer from fixed positioning, cumbersome adjustment, non-uniform force distribution, and unwanted displacement, leading to discomfort and weight distribution issues.

Innovation Solution

A fastening device with four peripheral hook elements, a central adjustment unit, and a fastening cord, allowing for adjustable positioning and uniform force distribution, featuring a releasable locking connection that prevents longitudinal movement without high force, and includes elastic and flexible components for easy mounting.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the fastening device uses a fixed connection to the shoulder straps, then the structure is simple and stable, but the positioning cannot be adjusted at all

Engineering Contradiction:

Improvepositioning adjustabilityVSAvoidfastening device structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The fastening device is divided into separate modular components: cord holding receptacles that can be positioned at different locations on the shoulder straps, a central adjustment unit, and a fastening cord. This segmentation allows each component to be independently positioned and adjusted, providing adaptability while keeping individual components relatively simple.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The fastening device transitions from a fixed structure to a dynamic adjustable structure. The cord holding receptacles can be positioned at different locations, and the central adjustment unit allows the fastening cord to be adjusted in length and tension, enabling the device to adapt to different wearing conditions and body types.

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If the fastening device allows positioning adjustment along a distance, then adaptability is improved, but the straps cannot be fixed in a certain position causing continuous movement and displacement

Engineering Contradiction:

Improvepositioning flexibilityVSAvoidfastening device stability

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The cord holding receptacles are pre-positioned at specific locations on the shoulder straps before use. The central adjustment unit is pre-configured with locking mechanisms. This preliminary arrangement allows the wearer to quickly select and fix a desired position without continuous movement, combining positioning flexibility with stability.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The fastening device includes self-locking mechanisms in the central adjustment unit that automatically maintain the selected position. Once the fastening cord is adjusted to the desired length, the locking mechanism holds it in place without requiring continuous adjustment, providing both flexibility and stability.

Inventive Principle:

Principle #25Self-service

3Measurement precision

If the fastening device uses a complex adjustment mechanism for tightening, then positioning precision is improved, but adjustment becomes cumbersome during activities such as running

Engineering Contradiction:

Improvepositioning precisionVSAvoidadjustment ease

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

The complex adjustment mechanism is extracted and simplified into a central adjustment unit with a straightforward locking system. The fastening cord can be easily pulled and locked into place without requiring complex operations, making it suitable for use during physical activities while maintaining sufficient positioning precision.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The adjustment mechanism uses discrete parameter changes through pre-defined cord lengths and locking positions rather than continuous adjustment. This simplifies the operation to selecting from available positions and locking, reducing the complexity of adjustment while maintaining adequate precision for different wearing needs.

Inventive Principle:

Principle #35Parameter changes

4Ease of operation

If the fastening device exerts non-uniform pulling forces on the shoulder straps, then the structure is simpler, but discomfort and undesired displacement occur

Engineering Contradiction:

Improvewearer comfortVSAvoidforce distribution mechanism

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The fastening device uses a symmetric arrangement of cord holding receptacles and fastening cords that naturally distributes forces uniformly across the shoulder straps. This symmetric design ensures that pulling forces are evenly distributed, improving wearer comfort without requiring complex active force distribution mechanisms.

Inventive Principle:

Principle #4Asymmetry

Data Source

PatentUS12402680B2Fastening device and wearable article with a fastening device

Publication Date: 2025.09.02 ON CLOUDS GMBH

AI summary

A fastening device (1) for a wearable article, the fastening device including four hook elements (2, 3, 4, 5) a central adjustment unit (6) and fastening cord (7). Furthermore, a wearable article with one or two fastening devices is disclosed.