Sound Generator Spring Positioning for Acoustic Performance
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Solution Overview
Problem
Conventional sound generators in mobile devices face limitations in low-frequency response due to the restricted size of the spring within the frame, which hampers the expansion of audio capabilities and acoustic performance.
Innovation Solution
The sound generator design incorporates a spring with a four-corner shaped structure and annular configuration that maximizes the use of external space, allowing for enhanced elastic support and positioning, thereby reducing low-frequency response and improving acoustic performance by effectively connecting the magnetic circuit system to the frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the spring is provided inside the inner space of the frame, then the structure is compact, but the spring size is limited causing loss in acoustic performance
Solution Approach 1:
The spring is repositioned from the inner space to the outer surface of the frame, utilizing the previously unused external dimension. This dimensional transition allows the spring to achieve its full required size without being constrained by the limited internal volume, thereby resolving the contradiction between compact structure and acoustic performance.
Solution Approach 2:
The spring is configured to wrap around the magnetic circuit system, with the magnetic circuit system nested within the spring's loop structure. This nested arrangement allows both components to occupy overlapping spatial zones efficiently, maximizing space utilization while maintaining the spring's adequate size for acoustic performance.
2Reliability
If the spring size is increased to improve acoustic performance, then the low-frequency response improves, but the space required inside the frame increases
Solution Approach 1:
By moving the spring to the outer surface of the frame, the design accesses external three-dimensional space rather than being confined to the two-dimensional internal floor plan. This allows the spring to achieve the length and volume necessary for improved low-frequency response without consuming additional internal frame space.
Solution Approach 2:
The spring is divided into multiple segments or loops that wrap around the magnetic circuit system. This segmentation allows the spring to achieve its total required length through multiple turns around the central structure, effectively increasing spring size for better acoustic performance while maintaining compact overall dimensions.
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 enhances the acoustic performance of sound generators by optimizing the spring's placement and structure, allowing for better utilization of space and improved low-frequency response, thus enhancing the overall audio experience in portable devices.
Implementation Method 1
a spring (4) connecting the magnetic circuit system (2) and the frame (3)
Implementation Method 2
The voice coil 12 is used to interact with the magnetic fluxes produced in the magnetic gap while electrified, for driving the diaphragm 12 to vibrate
Data Source
AI summary
The present invention provides a sound generator, includes a frame with an accommodating space, a magnetic circuit system and a vibration system. The magnetic yoke includes a bottom wall, a side wall and a supporting plate bending and extending from the side wall. The frame includes an upper surface close to the diaphragm and a lower surface provided with a fixing post. The spring includes an inner edge close to the accommodating space and an outer edge opposite to the inner edge and far away from the accommodation space. The fixing post is provided between the inner edge of the spring and the side wall. Compared to the relate art, the spring of the present invention can make more effective use of space, ensure the spring size, thus reducing the low-frequency response of the sound generator to further improve the acoustic performance.