Sheet Ear Hook Mask Bonding to Prevent Edge Lift
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Solution Overview
Problem
Existing mask designs with sheet-shaped ear hook portions often rise from the mask body, causing discomfort and aesthetic issues during use.
Innovation Solution
A mask design with sheet-shaped annular ear hook portions that are fusion-bonded to the mask body along a vertical direction, with a fusion-bonding treated region extending beyond the inner edge of the fixed portion to ensure secure attachment and prevent rising.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If sheet-shaped ear hook portions are used instead of string-shaped ones, then the burden on the ears is reduced, but the ear hook portions may rise from the mask body causing discomfort and aesthetic issues
Solution Approach 1:
The patent applies preliminary action by performing fusion bonding in advance during manufacturing to secure the ear hook portion to the mask body. The bonding is prepared beforehand with specific parameters (temperature, pressure, time) to ensure the ear hook portion remains stable during subsequent wearing, preventing the rising issue without compromising comfort.
Solution Approach 2:
The patent utilizes parameter changes by adjusting fusion bonding parameters (temperature, pressure, time) to optimize the bonding between the ear hook portion and mask body. By controlling these parameters, the patent achieves strong adhesion that prevents the ear hook portion from rising during wearing, while maintaining the comfort benefits of sheet-shaped design.
2Device complexity
If the ear hook portion is joined on the outer face of the mask body, then the structure is simplified, but the folded-over portion may not contour the mask body and may rise apart
Solution Approach 1:
The patent applies local quality by concentrating the fusion bonding at specific locations where the ear hook portion contacts the mask body. Instead of uniform bonding throughout, the bonding is localized to critical areas that prevent the folded-over portion from rising, while maintaining the simplicity of the overall structure.
Solution Approach 2:
The patent uses preliminary action by pre-positioning the ear hook portion and applying fusion bonding before the mask is put on. This preliminary securing ensures that the folded-over portion is already constrained to contour the mask body properly, preventing any potential rising during subsequent wearing.
3Reliability
If the fusion-bonding treated region is made larger to exceed the inner peripheral edge, then the ear hook portion is more securely attached, but the manufacturing precision requirements increase
Solution Approach 1:
The patent applies parameter changes by adjusting the fusion bonding parameters (temperature, pressure, time) to achieve reliable attachment even with a bonding region that exceeds the inner peripheral edge. By optimizing these parameters, the patent ensures secure bonding without requiring extremely tight manufacturing tolerances, thus balancing reliability with manufacturability.
Solution Approach 2:
The patent uses partial or excessive action by intentionally making the fusion-bonding treated region larger than the inner peripheral edge of the ear hook portion. This excessive bonding coverage ensures secure attachment and prevents rising, while the patent manages the resulting manufacturing precision requirements through optimized bonding parameters and reasonable tolerance specifications.
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 effectively prevents the ear hook portions from rising, enhancing comfort and appearance while maintaining secure fit and adhesion.
Implementation Method 1
The fixed portion is joined by using a fusion bonding treatment on an outer face of the mask body at a joined region extending in the vertical direction
Data Source
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AI summary
A mask includes a mask body, and a pair of sheet-shaped annular ear hook portions. The pair of sheet-shaped annular ear hook portions include fixed portions that are fixed to end portions of the mask body in a lateral direction thereof and extend in a vertical direction thereof. The fixed portions are joined on an outer face of the mask body at joined regions extending in the vertical direction. At least part of inner peripheral edges of the fixed portions are included in the joined regions.