Multifunctional Sounding Device with Integrated Motor Assembly
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Solution Overview
Problem
Existing multifunctional sounding devices face challenges in reducing thickness and volume while maintaining acoustic and vibration performance, due to the stacked configuration of the vibration system and the interference of magnetic fields.
Innovation Solution
The proposed multifunctional sounding device incorporates a magnetic circuit system with a main magnetic circuit, first and second auxiliary magnetic circuits, and a motor assembly with a vibration unit and elastic members, arranged to optimize driving force and reduce volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the vibration system is stacked under the sounding unit, then the device can achieve vibration function, but the thickness of the sounding device increases
Solution Approach 1:
The patent combines the vibration system and sounding unit into a shared structure where the motor assembly serves both vibration and acoustic functions. The vibration unit is integrated with the magnetic circuit system of the sounding unit, allowing both functions to coexist in the same spatial envelope rather than stacking separate systems, thereby achieving vibration capability without increasing thickness.
2Adaptability or versatility
If the sounding unit and magnets of the vibration system are not on the same plane, then both functions can be achieved, but the driving forces of the respective magnetic fields interfere and affect each other
Solution Approach 1:
The magnetic circuit system is divided into separate magnetic circuits for the sounding unit and vibration system. The sounding unit has its own magnetic circuit with voice coil and magnet, while the vibration system has a separate motor assembly with its own magnetic circuit. This segmentation allows independent control and eliminates magnetic field interference between the two functions while maintaining compact integration.
3Reliability
If the weight counterweight is bulky, then vibration performance can be achieved, but material costs are wasted
Solution Approach 1:
The motor assembly serves dual purposes: it provides the driving force for vibration and simultaneously acts as the counterweight system. The motor assembly includes a stator, rotor, and permanent magnets that provide both the necessary mass for vibration balance and the electromagnetic force generation, eliminating the need for separate bulky counterweights and reducing material costs.
4Ease of manufacture
If the volume is too large, then assembly can be simplified, but the device cannot be miniaturized and acoustic and vibration performance are poor
Solution Approach 1:
The vibration system is nested within the same housing as the sounding unit. The motor assembly of the vibration system is positioned adjacent to and integrated with the magnetic circuit system of the sounding unit, sharing common structural elements and space. This nested arrangement minimizes overall device volume while maintaining adequate space for both acoustic and vibration performance, and simplifies assembly by reducing the number of separate components.
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 allows for a thinner and more compact device with improved acoustic and vibration performance, while also reducing material costs and assembly complexity.
Implementation Method 1
a magnetic circuit system with a magnetic gap for driving the vibration system to vibrate and produce sound
Implementation Method 2
an elastic member suspending the vibration unit in the containment space
Implementation Method 3
The vibration unit includes a driving coil positioned on a side of the first auxiliary magnetic circuit away from the vibration system
Data Source
AI summary
The present disclosure provides a multifunctional sounding device, which includes a housing body with a containment space, and a sounding unit. The housing body is provided with a sound outlet. The sounding unit includes a frame, a vibration system, and a magnetic circuit system. The multifunctional sounding device also includes a motor assembly accommodated in the containment space. The motor assembly includes a vibration unit having a driving coil. The driving coil is positioned on the side of the first auxiliary magnetic circuit away from the vibration system. The main magnetic circuit and the second auxiliary magnetic circuit are fixed to the vibration unit. The first auxiliary magnetic circuit is fixed to the housing body. Compared with related technologies, the multifunctional sounding device in the present disclosure has a small overall thickness and volume, and has excellent acoustic performance.