Speaker Diaphragm Connection via Intermediary Rods
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Solution Overview
Problem
Existing bass loudspeakers face issues with air leakage due to connecting rods penetrating diaphragms, leading to poor sound quality and increased manufacturing complexity, especially when trying to reduce dimensions for thin electronic devices.
Innovation Solution
A speaker design featuring four diaphragms arranged in two groups, connected via inner and outer rods without penetrating the diaphragms, with a cavity sealing housing to separate acoustic cavities and reduce resonant frequency, improving sensitivity and manufacturing ease.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If connecting rods penetrate diaphragms to achieve connection between diaphragms, then the diaphragms can be connected to achieve optimization of acoustic-electric transition, but air leakage occurs resulting in poor sound quality
Solution Approach 1:
The patent introduces an intermediary connection structure that links diaphragms without direct penetration. The connecting rods connect to the diaphragm edges or surfaces through intermediate connection points, avoiding direct penetration that causes air leakage. This intermediary approach maintains the acoustic connection while eliminating the harmful air leakage effect.
Solution Approach 2:
The connection system is segmented into multiple independent connection points distributed along the diaphragm edges. Instead of a single penetration point, multiple connection points are provided, which distributes the connection function and eliminates air leakage at each individual connection point while maintaining overall structural integrity.
2Reliability
If multiple diaphragms are used to decrease resonant frequency and improve sensitivity, then acoustic performance is optimized, but manufacturing complexity increases
Solution Approach 1:
Multiple diaphragms are merged into a single integrated assembly where the diaphragms are connected through a unified connection structure. The connecting rods and diaphragm edges form an integrated system that can be manufactured as a complete assembly, reducing the complexity of manufacturing individual separate components while maintaining the acoustic benefits of multiple diaphragms.
Solution Approach 2:
The patent optimizes parameters such as the number, size, and arrangement of diaphragms to achieve the desired acoustic performance. By carefully selecting and adjusting these parameters, the system achieves optimal resonant frequency and sensitivity while controlling manufacturing complexity through standardized design choices.
3Power
If diaphragm area and product volume are increased to provide enough acoustical power, then bass performance is improved, but the speaker cannot be applied to thin electronic devices
Solution Approach 1:
The patent utilizes the edge surfaces and peripheral regions of the diaphragms, effectively using the two-dimensional edge area in addition to the traditional three-dimensional volume. By connecting diaphragms through edge connections and utilizing the planar edges for acoustic radiation, the system achieves enhanced bass performance without requiring increased product volume, making it suitable for thin electronic devices.
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 design eliminates air leakage, enhances acoustic performance, and simplifies the manufacturing process while effectively suppressing diaphragm polarization, resulting in improved sound quality and reduced manufacturing complexity.
Implementation Method 1
the inner connecting rods are connected with the diaphragms via the connecting points on the domes, and the inner connecting rods, which are connected with the two groups of diaphragms, respectively, are connected with each other via different outer connecting rods
Implementation Method 2
the cavity sealing housing seals the front acoustic cavity or the rear acoustic cavity to separate the front acoustic cavity from the rear acoustic cavity of the speaker
Implementation Method 3
the driving source comprises a magnetic circuit, which is to drive the movement of one group of the diaphragms by being connected with the diaphragm of said one group which is adjacent to the magnetic circuit
Data Source
AI summary
A speaker comprises at least four diaphragms, inner connecting rods, outer connecting rods, and a cavity sealing housing. Diaphragms spaced apart from each other respectively form a set of diaphragms. The two sets of diaphragms move relative to each other. Connecting points are provided on rigid domes of each of the diaphragms. The inner connecting rods are connected to the diaphragms via the connecting points on the domes. The inner connecting rods respectively connected to the two sets of diaphragms are connected one to another via different outer connecting rods. Cavities of the speaker are formed between adjacent diaphragms. Cavities spaced apart from each other jointly form a front acoustic cavity. The cavities adjacent to the front acoustic cavity form a rear acoustic cavity. The cavity sealing housing seals the front acoustic cavity/rear acoustic cavity, thus allowing separation of the front and rear acoustic cavities of the speaker.