Mouth-Nose Mask with Partially Connected Filter Layers
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Solution Overview
Problem
Conventional mouth-nose protections often fail to adapt well to facial shapes, leading to leaks and discomfort, while also being costly and having limited service life and protective effectiveness.
Innovation Solution
A mouth-nose protection design featuring a central fold that divides it into two congruent halves with partially connected superimposed layers of filter material, allowing for better facial adaptation and comfort, and providing a high filtering effect with low breathing resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional mouth-nose protection is designed with fully connected layers to maintain structural integrity, then manufacturing precision and sealability are improved, but adaptability to facial shapes and wearing comfort deteriorate
Solution Approach 1:
The mask is divided into multiple superimposed layers that are only partially connected at their edges, creating independent segments that can move and adapt relative to each other. This segmentation allows the mask to conform to various facial shapes while maintaining sufficient connection to ensure sealability and structural integrity.
Solution Approach 2:
Different regions of the mask have different connection characteristics - the edges are partially connected while other areas remain independent. This creates local variations in flexibility and adaptability, allowing the mask to best fit facial contours where needed while maintaining sealability in critical areas.
2Reliability
If conventional mouth-nose protection uses rigid structures to ensure sealability, then protective effect is improved, but wearing comfort and adaptability deteriorate
Solution Approach 1:
The mask transitions from a rigid static structure to a dynamic flexible structure where superimposed layers can move and adapt relative to each other. This dynamic behavior allows the mask to conform to facial shapes and movements, improving wearing comfort while maintaining the protective seal through the partial connections between layers.
3Ease of manufacture
If conventional mouth-nose protection is designed as disposable to reduce cost, then manufacturing cost is reduced, but service life and environmental impact worsen
Solution Approach 1:
The mask design enables reuse by creating a durable structure with partial connections between layers that maintain integrity over multiple uses. The partial connection design allows the mask to be washed and reused without compromising the protective effect, extending service life and reducing the need for continuous disposal.
4Manufacturing precision
If conventional mouth-nose protection uses metal brackets to improve nose area seal, then sealability is improved, but device complexity and manufacturing cost worsen
Solution Approach 1:
The invention extracts and removes the metal brackets from the mask design, achieving nose area sealability through the partial connection design of the superimposed layers themselves. This eliminates the need for separate metal bracket components, reducing device complexity and manufacturing cost while maintaining the protective seal.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design ensures a better seal and comfort by allowing the layers to conform to facial shapes, achieving high filtering efficiency and extending the service life of the mask, while being easier to manufacture and reuse.
Implementation Method 1
the mouth-nose protection typically has a filter medium embedded between two layers of nonwoven fabric, which absorbs the secretion droplets that are emitted from the mouth and nose
Implementation Method 2
the at least two layers being only partially connected at their edges... allows the layers to conform to facial shapes
Data Source
AI summary
A mouth-nose mask for reducing the transmission of pathogens via droplets of secretion is disclosed. The mouth-nose mask includes a central fold which defines a chin-nose line of the mouth-nose mask and separates the mouth-nose mask into two substantially congruent halves. A fastening means for fastening the mouth-nose mask to a wearer's ears or back of the head is attached to the ends of the two halves remote from the central fold. The mouth-nose mask includes at least two superposed layers of a filter material, the at least two layers defining the outer shape of the mouth-nose mask and being only partially joined to one another at their edges.