Folded-Ring Speaker Structure for High-Frequency Output
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing speakers, particularly headphones, face challenges in achieving high output performance due to the structure of the diaphragm and supporting structures, which affect sound quality and user comfort.
Innovation Solution
The speaker design includes a diaphragm with a folded-ring region and a bracket connected to a magnetic circuit component, featuring specific dimensions and angles, along with a rear cavity and air holes to optimize sound transmission and reduce leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the bracket thickness is increased to improve structural stability, then the speaker structure becomes more stable, but the speaker size increases and high-frequency sound production is affected
Solution Approach 1:
The bracket is designed with non-uniform thickness, having a first part with thickness of 0.3mm-3mm connected to the folded-ring region and a second part connected to the magnetic circuit component. This local quality variation provides structural stability where needed while maintaining lightness and high-frequency response in other areas.
Solution Approach 2:
The bracket is divided into multiple parts (first part and second part) with different thicknesses and functions. The first part connects to the folded-ring region while the second part connects to the magnetic circuit component, allowing each segment to be optimized for its specific function.
2Productivity
If the folded-ring region is designed with inclined sections to improve sound transmission, then sound intensity at the ear canal increases, but the manufacturing complexity increases
Solution Approach 1:
The folded-ring region incorporates an arc-shaped section with a height-to-span ratio of 0.35-0.4, and inclined sections with angles of 5°-30°. These curved and angled geometries optimize sound wave transmission paths to increase sound intensity at the ear canal while remaining manufacturable through standard molding or forming processes.
3Productivity
If the dome dimensions are optimized to improve high-frequency response, then the speaker output performance increases, but the structural strength may be reduced
Solution Approach 1:
The dome is designed with specific dimensional parameters: span of 2mm-8mm and height of 0.7mm-1.2mm, with a height-to-span ratio of 0.1-0.3. These parameter optimizations enhance high-frequency sound production while the supporting folded-ring region and bracket structure provide the necessary structural strength.
Solution Approach 2:
The dome is positioned at an end of the first connecting section far from the first inclined section, creating a three-dimensional structure where the dome's vertical height dimension works independently from the horizontal span, allowing optimization of both acoustic performance and structural integrity.
4Use of energy by moving object
If the coil is positioned closer to the magnetic circuit component to improve efficiency, then energy conversion efficiency increases, but the risk of collision during vibration increases
Solution Approach 1:
The folded-ring region acts as an intermediary structure between the coil and the magnetic circuit component. It provides a controlled gap and positioning mechanism that allows the coil to be positioned close to the magnetic circuit for efficient energy conversion while preventing direct contact or collision during diaphragm vibration.
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 enhances high-frequency sound production and improves user comfort by minimizing sound leakage and maximizing sound intensity at the ear canal, while maintaining structural stability.
Implementation Method 1
the coil may drive the diaphragm to vibrate to generate sound after the coil is energized
Implementation Method 2
the coil may drive the diaphragm to vibrate to generate sound
Data Source
AI summary
A speaker includes a diaphragm, a magnetic circuit component, a coil, and a bracket arranged around the magnetic circuit component. At least part of the coil is arranged in a magnetic gap formed by the magnetic circuit component. The coil drives the diaphragm to vibrate to generate sound after the coil is energized. The diaphragm includes a main-body region and a folded-ring region surround the main-body region. A first part of the bracket is connected to the folded ring region. A thickness of the first part of the bracket is within a range of 0.3 mm-3 mm. The thickness of the first part is a minimum distance between a connection region and an attaching region. The connection region is a region where the bracket and the folded-ring region connect. The attaching region is a region where the bracket directly attaches to the magnetic circuit component in a vibration direction of the diaphragm.