Damper Voice Coil for Thin Speaker Deflection Control
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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 during high amplitude vibrations, and have limited magnetic flux due to insulation gaps, resulting in low sound quality and durability issues.
Innovation Solution
A thin speaker design incorporating a damper voice coil with a holding member and conductive member, featuring windings and suspension portions that prevent deflection and increase magnetic flux by ensuring continuous contact between conductor and insulation layers, while reducing weight and volume through a two-magnet setup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If no damper is used in the thin speaker design, then the speaker maintains a thin profile, but the voice coil deflects during high amplitude vibrations causing high distortion rate
Solution Approach 1:
The patent combines the damper function with the voice coil structure by integrating a damper ring directly onto the voice coil former. This merging allows the thin speaker to maintain its compact profile while incorporating damping functionality that prevents voice coil deflection during high amplitude vibrations, thereby reducing distortion without increasing overall speaker thickness
Solution Approach 2:
The damper ring acts as an intermediary element between the voice coil and the surrounding magnetic structure. It provides mechanical support and damping action to the voice coil during operation, preventing excessive deflection while maintaining the thin overall design. The damper ring mediates between the need for thin profile and the need for vibration control
2Reliability
If insulation layers are used with circular cross-section wires, then electrical insulation is provided, but gaps between insulation layers result in small conductor area and magnetic leakage
Solution Approach 1:
The patent changes the wire cross-section from circular to rectangular shape. This geometric modification allows the insulation layers to contact each other by faces rather than by points, eliminating gaps between adjacent wires. The rectangular cross-section maintains adequate insulation while maximizing the conductor area and reducing magnetic leakage, thereby improving magnetic flux efficiency
Solution Approach 2:
The invention changes the geometric parameters of the wire cross-section from circular to rectangular. This parameter change increases the effective conductor area by eliminating air gaps between insulation layers, while maintaining the necessary insulation properties. The rectangular shape optimizes the packing density and magnetic flux distribution in the voice coil
3Power
If lead wires are added for high capacity operation, then continuous signaling capability is improved, but the wire and lead wires become suspended and prone to fracture
Solution Approach 1:
The patent merges the lead wire function with the voice coil structure by integrating the electrical connections directly into the voice coil former. This integration eliminates separate suspended lead wires that are prone to fracture, while still providing the necessary electrical connectivity for high capacity operation. The combined structure maintains structural integrity and electrical functionality
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 segments the magnetic circuit into optimized sections arranged in a compact configuration. By strategically positioning magnetic poles and using magnetic conductive materials effectively, the design achieves the necessary magnetic field distribution for larger speaker dimensions without proportionally increasing the number of magnetic device sets, thereby controlling the overall weight
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 significantly reduces distortion, enhances sound quality, and increases power rating by maintaining balanced vibrations and improving magnetic flux, resulting in a more efficient and durable thin speaker.
Implementation Method 1
an electromagnetic field is generated when electric current flows through the winding 1033 of the voice coil 103; 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 2
such electromagnetic field is perpendicular to a fixed magnetic field provided by the magnetic device 102 and generates an attraction or a repulsion, causing the duct 1031 of the voice coil 103 to perform a vertical reciprocating motion
Implementation Method 3
the voice coil 103 is easily deflected during the reciprocating motion, causing a high distortion rate of the conventional thin speaker 100
Data Source
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.