Diaphragm Pleat Pattern for Low-Frequency Distortion Control
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Solution Overview
Problem
Conventional diaphragms in sound generators often experience low-frequency distortion due to creases or concaves during vibration, leading to vibration deviation and compromised acoustic performance.
Innovation Solution
A diaphragm design featuring a central dome, a suspension system with a convex part and pleats, where the pleats have specific pattern sections and a racetrack shape, and a concave part to enhance vibration stability and reduce distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the diaphragm has a simple dome and suspension structure, then the manufacturing process is simple, but low-frequency distortion occurs due to creases and concaves during vibration
Solution Approach 1:
The suspension part is segmented into multiple functional regions: a convex part with pleats for vibration stability, a concave part for structural support, and fixation parts for mounting. This segmentation allows each region to perform its specific function, preventing creases and concaves during vibration while maintaining manufacturability through modular design
Solution Approach 2:
Different regions of the diaphragm are given different local structures: the convex part has pleats with specific pattern sections (first, second, and third pattern sections with different heights) to control vibration characteristics, while the concave part provides structural support. This local quality differentiation prevents low-frequency distortion without complicating the overall manufacturing process
2Speed
If the diaphragm vibrates up and down freely, then the vibration amplitude is large, but creases and concaves form causing vibration deviation
Solution Approach 1:
The convex part with pleats and the concave part are designed in advance to counteract the formation of creases and concaves before they can cause vibration deviation. The pleats' specific pattern sections (with the third pattern section having smaller height) and the concave part's structure preemptively prevent the harmful deformation during vibration, allowing large amplitude vibration while maintaining consistency
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 diaphragm design effectively reduces low-frequency distortion, improves vibration stability, and enhances acoustic performance by preventing wrinkles and ensuring stable vibration, resulting in better compliance and sound quality.
Implementation Method 1
The vibration system comprises a voice coil suspended in the magnetic gap and a diaphragm connected to and driven by the voice coil
Implementation Method 2
During the vibration process of the diaphragm of this structure, when the diaphragm vibrates up and down
Data Source
AI summary
The invention discloses a diaphragm and a sound generator having a diaphragm. The diaphragm includes a dome part arranged centrally and a suspension part surrounding the dome part. The suspension part is provided with pleat groups. The pleat group includes many pleats, and each pleats includes a first pattern section, a second pattern section, and a third pattern section connecting the first pattern section and the second pattern section. The height of the third pattern section along the vibration direction is smaller than the protrusion height of the first pattern section and the second pattern section along the vibration direction. The diaphragm of the present invention can be used to reduce low frequency distortion.