Rectangular Locking Ring Diaphragm Fastening for Acoustic Devices
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Solution Overview
Problem
Conventional acoustic devices face challenges in enhancing sound pressure and low-frequency output due to limitations in the area of the vibrating diaphragm portion and the use of adhesives, which complicates the manufacturing process and affects acoustic performance.
Innovation Solution
The acoustic device features a housing with a curled structure for assembly without adhesives, a paramagnetic yoke, and a diaphragm with a rectangular locking ring that securely fastens the diaphragm, increasing the vibrating area and internal volume to enhance sound pressure and low-frequency output through resonance control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the area of the fastened portion of the diaphragm is increased to prevent falling, then the diaphragm is securely fastened, but the area of the vibrating portion is reduced, resulting in reduced sound pressure
Solution Approach 1:
The locking ring changes from a conventional circular shape to a rectangular shape with its long side extending in the radial direction of the diaphragm. This dimensional change allows the locking ring to effectively fasten the diaphragm edge while preserving more of the diaphragm's vibrating area, thus resolving the contradiction between fastening security and vibrating portion area.
2Reliability
If adhesives are used to fasten the diaphragm, then the assembly is secure, but the manufacturing process becomes complex and acoustic performance is affected
Solution Approach 1:
The invention extracts and eliminates the adhesive from the assembly process. Instead of using adhesives to fasten the diaphragm, the patent employs a mechanically fastening structure where the rectangular locking ring physically secures the diaphragm edge. This removes the complexity of adhesive application while maintaining secure assembly.
3Productivity
If the internal volume is increased to improve low-frequency output, then the resonance performance is enhanced, but the device size increases
Solution Approach 1:
The locking ring employs asymmetric geometry with its long side extending radially and short sides extending axially. This asymmetric design optimizes the fastening function while minimizing the additional volume introduced by the locking structure, allowing for increased internal volume for resonance without excessive device size increase.
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 solution improves sound pressure and output across the frequency band by increasing the vibrating area of the diaphragm and internal volume, reducing manufacturing complexity and defect rates, while maintaining aesthetic appeal and acoustic performance.
Implementation Method 1
the voice coil vibrates due to electromagnetic interaction with a magnetic circuit
Implementation Method 2
The yoke enables high-density, uniform magnetic force to be obtained by concentrating the magnetic force generated by the magnet
Implementation Method 3
the diaphragm vibrates also and generates sound
Implementation Method 4
improves output in a low frequency band because an internal volume is large
Data Source
AI summary
Disclosed herein is an acoustic device with improved acoustic performance. The acoustic device includes: a housing that forms the appearance of the acoustic device; a magnet that generates magnetic force; a yoke that includes paramagnetic material that concentrates the magnetic force; a voice coil that vibrates due to the magnetic force when an electric signal having sound information is applied; a diaphragm that comes into close contact with the voice coil and that vibrates and generates sound in response to the vibration of the voice coil; a plate that is located between the diaphragm and the magnet; and a locking ring that is located on the plate and that fastens part of the diaphragm, wherein the sectional surface of the locking ring has a rectangular shape the height of which is greater than the width thereof.