External Hem Hygienic Bag Drawstring Mechanism

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Solution Overview

Problem

Existing recovery devices for excrement and urine do not adequately prevent accidental contact with contaminants during handling and closure, posing a risk of infection in healthcare settings.

Innovation Solution

A hygienic bag design featuring a hem on the external face with openings allows users to manipulate the tightening link from outside, preventing direct contact with the contents during use and closure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the bag is sealed with a drawstring from the inside, then the bag can be tightly sealed after use, but the user risks involuntary or accidental contact with contaminated contents during handling and closure

Engineering Contradiction:

Improveinfection preventionVSAvoidhandling safety

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent introduces an intermediary mechanism (the drawstring extending through the hem to the external face) that allows the user to manipulate the sealing function without direct contact with the contaminated interior. The drawstring acts as a mediator between the user's hand and the bag's closure mechanism, enabling safe operation while maintaining sealing reliability

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent inverts the traditional drawstring arrangement by placing the hem on the external face rather than the internal face. This inversion allows the drawstring to be accessible from the outside, fundamentally changing the interaction sequence from inside-to-outside manipulation to outside-to-inside manipulation, thereby preventing contact with contaminants

Inventive Principle:

Principle #13The other way round (Inversion)

2Ease of operation

If the hem is placed on the internal face of the bag, then the drawstring can be easily accessed, but the user cannot avoid contact with contaminated contents during closure

Engineering Contradiction:

Improvedrawstring accessibilityVSAvoidcontaminant contact risk

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The patent applies inversion by relocating the hem from the internal face to the external face of the bag. This reverses the spatial arrangement so that the drawstring manipulation point is outside the contamination zone rather than inside it, maintaining accessibility while eliminating harmful contact

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent changes the dimensional location of the hem from an internal position to an external position on the bag's surface. This spatial dimensionality change moves the interaction interface from the contaminated interior space to the clean exterior space, allowing safe operation

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentEP3863586B1Hygienic bag that can be handled without contact with the contents thereof

Publication Date: 2024.08.28 SOC DIDACTIC

Figure 1~2

AI summary

The invention relates to a hygienic bag that can hold secretions or faeces and more generally any substance with which it is necessary not to come into direct contact, in particular for sanitary reasons, and comprising a seam (1) situated on the outer face of the bag forming one or more openings (2) in which the hands can be positioned, a drawstring (3) introduced into said seam, one or more orifices (4) made in the outer seam (1) of the bag where said drawstring (3) passes through, and to the method for installing same.