Acoustic Receiver Modular Subassembly Design
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Solution Overview
Problem
The existing manufacturing processes for acoustic receivers are slow and costly due to laborious manual assembly, requiring extensive labor for loading and unloading components into fixtures.
Innovation Solution
The acoustic receiver design employs separate subassemblies, including a motor with a coil and yoke, and a closed-ended housing sidewall formed from folded sheet material, allowing for faster and more cost-effective assembly by using a bottom and top housing plate with a closed-ended sidewall that can be easily assembled and inspected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual assembly of acoustic receiver components is used, then assembly precision can be maintained, but productivity is reduced and labor costs increase
Solution Approach 1:
The acoustic receiver is divided into modular subassemblies (motor assembly, housing assembly, diaphragm assembly) that can be manufactured separately and then quickly assembled together. This segmentation allows each module to be pre-assembled with precision while enabling rapid final assembly through standardized interfaces.
Solution Approach 2:
Components such as the motor assembly and housing subassemblies are prepared in advance as pre-assembled modules. This preliminary action allows quality control and precision work to be done separately before final assembly, improving both precision and overall productivity.
2Manufacturing precision
If complex multi-step assembly processes are used, then manufacturing precision can be ensured, but loss of time increases
Solution Approach 1:
The assembly process is segmented into independent stations, each handling a specific subassembly. This eliminates the need for continuous manual manipulation and reduces the time components spend in fixtures, while maintaining precision through dedicated assembly steps for each module.
Solution Approach 2:
The housing sidewall is designed to self-align and self-position components during assembly, reducing the need for complex fixtures and manual adjustment. This self-service mechanism maintains alignment precision while significantly reducing assembly time.
3Strength
If traditional deep drawing process is used for housing, then structural strength is achieved, but device complexity increases
Solution Approach 1:
The housing sidewall is formed as a thin-walled structure from sheet material that is folded and formed into shape. This approach achieves the required structural strength through optimized geometry and material selection while simplifying the manufacturing process compared to traditional deep drawing, and enables easier assembly.
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
This approach enables faster and more cost-effective manufacturing of acoustic receivers, improving assembly efficiency and reducing labor costs, while allowing for improved camera inspection and easier attachment of components.
Implementation Method 1
An electrical signal applied to the coil creates a magnetic field within the motor causing the reed to move between the magnets
Implementation Method 2
Movement of the reed in turn causes movement of a diaphragm within a receiver housing, from which sound is emitted from an acoustic port
Data Source
AI summary
An acoustic receiver includes a first receiver subassembly having bottom housing plate with at least a portion of a motor fastened thereto, and a second receiver subassembly having a closed-ended housing wall with at least one open end that is fastened to the bottom housing plate. A method of making and assembling the components is also described.