Damper Voice Coil Thin Speaker Design
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Solution Overview
Problem
Conventional thin speakers suffer from high distortion rates and structural weaknesses due to the lack of a damper, leading to deflection and fracture issues during high amplitude vibrations, particularly at high volumes and low frequencies, resulting in low sound quality and limited power rating.
Innovation Solution
A thin speaker design incorporating a damper voice coil with a holding member and conductive member, featuring windings and suspension portions that provide structural support and increased magnetic flux, reducing distortion and enhancing sound quality while maintaining a compact, lightweight structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the conventional thin speaker design is used without a damper, then the speaker maintains a thin structure, but the voice coil deflects during high amplitude vibrations causing high distortion rate
Solution Approach 1:
The patent combines the damper function and voice coil function into a single integrated component called the 'damper voice coil'. This merging allows the speaker to maintain its thin structure while the integrated damper voice coil prevents deflection during high amplitude vibrations, thereby reducing distortion rate without increasing speaker thickness
2Reliability
If lead wires are added to connect with the wire ends, then continuous signal transmission is enabled, but the wire or lead wires can be readily fractured over time
Solution Approach 1:
The patent integrates the connection function directly into the damper voice coil structure. The holding suspension portions are integrally formed with the voice coil, eliminating the need for separate lead wires. This merging of functions ensures continuous signal transmission while the integral structure prevents fracture issues associated with separate wire connections
3Device complexity
If the wire cross section is circular with point contact insulation layers, then the structure is simple, but the conductor area is small resulting in more magnetic leakage
Solution Approach 1:
The patent changes the wire cross-sectional shape from circular to rectangular. This parameter change increases the conductor area and enables face-to-face contact between insulation layers, thereby reducing magnetic leakage while maintaining structural simplicity
4Length of moving object
If multiple sets of magnetic devices are used for long dimension speakers, then the speaker can accommodate larger size, but the overall weight increases
Solution Approach 1:
The patent optimizes the magnetic device arrangement by utilizing the rectangular cross-section wire structure more effectively. The increased conductor area allows for more efficient magnetic flux utilization, enabling the speaker to achieve larger dimensions without proportionally increasing weight through multiple magnetic device sets
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 damper voice coil effectively prevents deflection during high amplitude vibrations, reduces distortion, and increases power rating, resulting in improved sound quality and efficiency with reduced magnetic leakage and weight.
Implementation Method 1
an electromagnetic field is generated when electric current flows through the winding 1033 of the voice coil 103
Implementation Method 2
such electromagnetic field is perpendicular to a fixed magnetic field provided by the magnetic device 102 and generates an attraction or a repulsion
Implementation Method 3
a thin speaker with a voice coil having a damper function
Data Source
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AI summary
A thin speaker with a voice coil having a damper function, includes a frame, a magnetic device, a damper voice coil and a diaphragm. The damper voice coil comprises a holding member and a conductive member. The holding member includes a holding base and two holding suspension portions formed on two ends of the holding base. The conductive member includes a conductor wound to form a first winding at one side of the holding base and a second winding at the other side of the holding base, and two conductive suspension portions formed on two ends of the conductor and located on the top of holding suspension portions. Since the damper voice coil has the functions of a damper and a voice coil, the present invention is capable of maintaining a thin design and ensuring the up and down movements of the holding base to prevent its deflection.