Speaker Voice Coil Circumference Expansion
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Solution Overview
Problem
Existing mobile device speakers face performance issues due to a small voice coil circumference, which limits acoustic performance, and increasing the voice coil circumference requires changes to the lower voice diaphragm component, affecting design space and performance.
Innovation Solution
A speaker design that includes a voice coil component with first and second voice coil portions, where the first voice coil portion is fixed to the lower voice diaphragm component through a holder, allowing for an increased voice coil circumference without altering the size or design space of the lower voice diaphragm component.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the circumference of the voice coil is increased to improve acoustic performance, then the acoustic performance is improved, but the design space of the lower voice diaphragm component is occupied and its size must be changed
Solution Approach 1:
The voice coil is designed with a protruding portion that extends in the direction perpendicular to the diaphragm's vibration direction, utilizing the vertical dimension rather than only the horizontal plane. This allows the voice coil circumference to be increased without occupying additional horizontal design space of the lower voice diaphragm component.
Solution Approach 2:
The voice coil is divided into multiple portions: first voice coil portions arranged close to the lower voice diaphragm component and second voice coil portions that protrude away from it. This segmentation allows different portions of the voice coil to be positioned at different heights, increasing the overall circumference while maintaining a compact horizontal footprint.
2Reliability
If the circumference of the voice coil is increased to improve acoustic performance, then the acoustic performance is improved, but the size of the lower voice diaphragm component is required to be changed
Solution Approach 1:
The voice coil structure utilizes the vertical dimension by having second voice coil portions protrude in the direction perpendicular to the diaphragm's vibration direction. This allows the voice coil circumference to be increased without requiring an increase in the horizontal dimensions of the lower voice diaphragm component.
Solution Approach 2:
The holder is designed with flexible connecting walls that allow the voice coil to assume different positions and shapes during assembly and operation. This dynamic design enables the voice coil to achieve a larger circumference while the lower voice diaphragm component maintains its original fixed size.
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 effectively lengthens the voice coil circumference while maintaining the existing size and design space of the lower voice diaphragm component, thereby enhancing the acoustic performance of the speaker.
Implementation Method 1
a voice coil for driving the diaphragm to vibrate
Implementation Method 2
a lower voice diaphragm component elastically supporting the voice coil component
Data Source
AI summary
Provided is a speaker, including frame, vibration unit, and magnetic circuit unit driving the vibration unit and having magnetic gap, the vibration unit including diaphragm fixed to the frame, voice coil component fixed to the diaphragm and driving the diaphragm, and lower voice diaphragm component supporting the voice coil component. The voice coil component includes voice coil inserted in the magnetic gap and holder fixed to the diaphragm and the voice coil, the voice coil includes first and second voice coil portions. The first voice coil portion is arranged close to the lower voice diaphragm component and is fixed to the lower voice diaphragm component through the holder. The first voice coil portion includes two first sides and second side connecting thereto, and the second voice coil portion protrudes away from the second side. The voice coil component has greater circumference than the racetrack voice coil, enabling better acoustic performance.