Hearing Device Module Sealing with Curable Adhesive
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Solution Overview
Problem
Existing hearing devices face challenges with space-consuming mechanical parts, excessive adhesive application, and limited serviceability due to strong adhesive bonds, making them cumbersome to assemble and repair.
Innovation Solution
A method of sealing a module in a hearing device housing using a low viscosity, curable sealing material that forms a minimal, invisible seal between the module and the housing, allowing for easy disassembly and reassembly without damaging components, and using a preformed inlay frame with hotmelt material for non-destructive removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If mechanical parts (springs, pins) are used to connect the faceplate to the housing, then the connection is mechanically strong, but the mechanical parts are space-consuming
Solution Approach 1:
The patent replaces mechanical connection parts (springs, pins) with an adhesive bonding system. The adhesive is applied in a controlled manner to create a strong bond between the faceplate and housing without requiring additional mechanical components, thereby eliminating space consumption while maintaining connection strength.
Solution Approach 2:
The patent changes the bonding mechanism from mechanical (physical interlocking) to chemical (adhesive bonding). This parameter change allows for a more compact design as adhesive requires minimal space compared to mechanical parts, while still providing sufficient bonding strength through chemical adhesion.
2Strength
If excessive adhesive is applied for adhesive bonding, then the bonding strength is sufficient, but the excess adhesive needs to be manually removed and the contour polished
Solution Approach 1:
The patent applies adhesive in a controlled, partial manner rather than excessive amounts. The adhesive is applied only where needed to create the bond, eliminating the need for manual removal and contour polishing operations. This reduces manufacturing complexity while maintaining sufficient bonding strength.
Solution Approach 2:
The adhesive application system is designed to self-limit the adhesive amount, preventing excess adhesive from occurring in the first place. This self-regulating approach eliminates the need for subsequent manual removal operations, simplifying the manufacturing process.
3Shape
If clear lacquer is applied to smoothen the surface and render the bonding interface invisible, then the appearance is improved, but the process is cumbersome and time-consuming
Solution Approach 1:
The adhesive is applied in a controlled manner from the beginning of the assembly process, creating a smooth surface directly during bonding. This preliminary action eliminates the need for subsequent clear lacquer application, reducing assembly time while maintaining surface smoothness and appearance.
4Strength
If strong adhesive bond is used for fixing the module, then the module is securely fixed, but the module cannot be easily removed for service and maintenance
Solution Approach 1:
The patent creates a dynamic bonding system where the adhesive provides strong fixation during normal operation but allows for controlled release during service. The adhesive bond strength is optimized to maintain secure fixation under operational conditions while permitting removal when service is required, balancing both requirements.
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 method provides a reliable, space-efficient seal that compensates for dimensional tolerances and allows for easy service and maintenance, reducing assembly time and costs while ensuring the seal is invisible and non-destructive.
Implementation Method 1
The sealing can equalize or rather compensate for possibly dimensional tolerances resulting from the manufacturing of hearing device components
Implementation Method 2
the method further comprises the step of curing the sealing material such to provide a seal in said space
Data Source
AI summary
The present invention relates to a method of sealing a module (14) in a hearing device housing. The method comprises the steps of preparing the module (14) and the hearing device housing, and applying a sealing material (28) into a space, said space being formed between the module (14) and the hearing device housing.