Breathing Mask Test Head With Replaceable Soft Face Front
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Solution Overview
Problem
Existing test heads for breathing masks lack ease of removal and mounting, fail to realistically simulate a human face, and are not adaptable to various mask sizes, making it difficult to detect sealing defects and ensuring proper protection against hazardous substances.
Innovation Solution
A test head system featuring a soft face front (SFF) made of a polyurethane compound or similar material, which is replaceable and self-adhesive, simulating human skin elasticity and friction, and a rotatable mechanism for easy handling and mounting, allowing for realistic mask size adaptation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a fixed hard head part is used for mask testing, then structural stability is improved, but adaptability to different mask sizes deteriorates
Solution Approach 1:
The test head is divided into a fixed hard head part and a replaceable soft face front. The hard head part provides structural stability while the soft face front can be exchanged to adapt to different mask sizes and testing requirements.
Solution Approach 2:
The hard head part serves as a universal base that can accommodate multiple types of soft face fronts, allowing the same structural core to support various testing configurations for different mask sizes and applications.
2Ease of manufacture
If a permanent face front is used, then manufacturing simplicity is improved, but ease of maintenance deteriorates
Solution Approach 1:
The face front is made replaceable rather than permanent, allowing it to be separated from the hard head part. This enables easy maintenance by replacing worn face fronts without affecting the main structural component.
Solution Approach 2:
The soft face front is designed as a consumable component that can be replaced when worn or contaminated, while the expensive hard head part is recovered and reused. This extends the overall system life while maintaining ease of maintenance.
3Ease of operation
If a simple mounting mechanism is used, then ease of operation is improved, but reliability of attachment deteriorates
Solution Approach 1:
The mounting mechanism uses a dynamic spring-loaded pin system that automatically engages with positioning holes when the face front is installed. This provides both ease of operation through automatic engagement and reliability through positive mechanical locking.
Solution Approach 2:
The spring pin mechanism is self-actuating, requiring no additional tools or complex operations for mounting. The operator simply inserts the face front and the spring pin automatically secures it, providing both ease of use and secure attachment.
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 system enables easier detection of mask sealing defects, supports multiple mask sizes, and facilitates efficient testing by simulating human face characteristics, ensuring effective protection and prolonged service life with easy cleaning and maintenance.
Implementation Method 1
The gel face should be placed as a kind of layer on a fixed face front and attached. The mechanical requirements include allowing a shock and pressure stress of the mask and straps only in which the mechanical stresses are relatively low.
Implementation Method 2
The rear side may be self-adhesive, and the front side or face side is covered with a resistant film.
Data Source
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Figure 5
AI summary
A test head (10) for breathing mask testing includes a hard head part (12) formed of a hard material and includes a face side (18) and a soft face front (14) of a defined thickness applied to the face side (18) of the hard head part (12). The soft face front (14) has a simulated human face surface defining a mask seal contact surface (22). A breathing mask testing system is also provided including the testing head (10) including a human face surface defining a mask seal contact surface (18) and a mouth opening connected to a respiration tube (50). A testing device (32) is provided with a test head adapter (30) protruding from the testing device (32). The hard head part (12) has a support portion (29) with an adapter interface for the adapter (30). The adapter interface includes a rotational position fixing mechanism for fixing the hard head part (10) to the adapter (30) in one of a plurality of rotational positions.