Dual-Sided Speaker Diaphragm for Compact Height and Vibration Control
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Solution Overview
Problem
Traditional vehicle-mounted cone speakers have issues with large structural size, low efficiency, and significant low-frequency vibration, failing to meet modern requirements for high sound quality, flexible layout, and low power consumption.
Innovation Solution
The design incorporates a speaker with a frame, a vibration system featuring two diaphragms and voice coil assemblies with staggered elastic wave assemblies, which are fixed to opposite sides of the frame, allowing for antiphase vibration and efficient use of internal space, reducing height and improving sound performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a traditional single diaphragm speaker structure is used, then the structural design is simple, but the speaker height is large and space utilization is low
Solution Approach 1:
The vibration system is segmented into two independent diaphragms (first diaphragm with first dome, second diaphragm with second dome) positioned on opposite sides of the frame. Each diaphragm has its own voice coil assembly and elastic wave assembly, allowing them to operate independently in opposite directions, thereby reducing the overall speaker height while maintaining functionality
Solution Approach 2:
The patent transitions from a single-sided diaphragm design to a dual-sided design, utilizing both sides of the frame for mounting diaphragms. This dimensional change allows the speaker to achieve the same acoustic output in a more compact height, effectively using the available space in the Z-direction (vibration direction)
2Object-affected harmful factors
If traditional elastic wave assembly arrangement is used, then the structure is simple, but the low-frequency vibration is significant and sound quality is poor
Solution Approach 1:
The first elastic wave assembly and second elastic wave assembly are configured to vibrate in opposite phases (antiphase). When one diaphragm moves outward, the other moves inward, creating counterbalancing forces that cancel out low-frequency vibrations and reduce unwanted resonances, thereby improving sound quality
Solution Approach 2:
The elastic wave assemblies are designed with specific periodic vibration characteristics, where the staggered distribution and antiphase operation create a periodic cancellation effect that targets and reduces low-frequency vibrations while maintaining higher frequency sound quality
3Object-affected harmful factors
If a single voice coil assembly is used, then the power consumption is low, but the sound quality and vibration balance are insufficient
Solution Approach 1:
The voice coil system is segmented into two separate voice coil assemblies, each mounted on opposite sides of the frame and connected to their respective diaphragms. This segmentation allows for balanced vibration control while distributing the electrical load, maintaining reasonable power consumption levels
Solution Approach 2:
The two voice coil assemblies are positioned asymmetrically on opposite sides of the frame, creating a balanced magnetic circuit system that improves vibration balance. The asymmetric positioning allows each voice coil to operate optimally in its respective magnetic gap while contributing to overall system balance
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 configuration results in a thinner, more efficient speaker with improved acoustic performance and reduced vibration, addressing the limitations of traditional speakers by enhancing space utilization and vibration balance.
Implementation Method 1
a voice coil assembly which is fixed to the diaphragm and inserted into the magnetic gap to drive the diaphragm to vibrate and produce sounds
Implementation Method 2
a first elastic wave assembly and a second elastic wave assembly which are fixed to the frame and are spaced from each other; one end of the first elastic wave assembly away from the frame is connected to the first dome connecting wall; one end of the second elastic wave assembly away from the frame is connected to the second dome connecting wall; and the first elastic wave assembly and the second elastic wave assembly are in staggered distribution and have antiphase vibration
Data Source
AI summary
The present disclosure provides a speaker, including a frame, a vibration system, a magnetic circuit system, the vibration system includes a first diaphragm and a second diaphragm which are fixed to two opposite sides of the frame, a first voice coil to drive the first diaphragm to vibrate, and a second voice coil assembly to drive the second diaphragm to vibrate. The vibration system further includes a first elastic wave assembly and a second elastic wave assembly which are fixed to the frame and are spaced from each other. The first elastic wave assembly and the second elastic wave assembly are in staggered distribution and antiphase vibration. By means of the staggered distribution of the first elastic wave assembly and the second elastic wave assembly, the first elastic wave assembly and the second elastic wave assembly make reasonable use of an internal space of the speaker.