Multifunctional Sounding Device Magnetic Circuit Merging
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Solution Overview
Problem
Existing multifunctional sounding devices face challenges in reducing thickness and minimizing the number of magnets, which leads to increased size, cost, and interference between magnetic fields, resulting in poor acoustic and vibration performance.
Innovation Solution
The device incorporates a housing body with a containment space, a sounding unit with a magnetic circuit system, and a vibration assembly with a coil assembly and elastic member, where the vibrator surrounds the magnetic circuit system and the coil assembly interacts with it to drive vibrations in a perpendicular direction, reducing the number of magnets and enhancing miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the motor assembly is stacked under the sounding unit, then the device structure is simple, but the thickness of the multifunctional sounding device increases
Solution Approach 1:
The patent combines the motor assembly and sounding unit into a shared magnetic circuit system. The motor magnetic circuit system includes a stator, rotor, and magnetic bridge, while the sounding unit shares the magnetic bridge and part of the stator structure. This merging eliminates the need for separate magnets in each assembly, reducing the overall thickness while maintaining structural simplicity.
2Reliability
If the sounding unit and motor assembly have their own magnets, then each component functions independently, but the number of magnets increases, leading to increased cost, size, and magnetic field interference
Solution Approach 1:
The patent merges the magnetic circuit systems by having the sounding unit share the magnetic bridge and stator structure with the motor assembly. The sounding unit includes a voice coil that interacts with the same magnetic field as the motor rotor, eliminating the need for separate magnets. This reduces the number of magnets while ensuring both components function independently through shared magnetic resources.
Solution Approach 2:
The magnetic bridge serves dual functions: it acts as part of the motor assembly's magnetic circuit and simultaneously serves as the magnetic circuit for the sounding unit. The stator structure also serves both the motor and sounding functions. This multi-functionality reduces the total number of magnets needed while maintaining independent operation of both components.
3Ease of manufacture
If multiple magnets are used in the sounding device, then each magnetic component can be optimized independently, but the magnetic fields interfere with each other, degrading acoustic and vibration performance
Solution Approach 1:
By merging the magnetic circuit systems through a shared magnetic bridge and stator, the patent eliminates multiple separate magnetic fields that would interfere with each other. The single integrated magnetic circuit ensures that the motor and sounding operations use the same magnetic field resources, preventing interference while allowing independent optimization of each component's interaction with the shared field.
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 achieves a more compact and cost-effective multifunctional sounding device with improved vibration and acoustic performance by reducing the number of magnets and optimizing the magnetic circuit system.
Implementation Method 1
The coil assembly interacts with the magnetic circuit system for driving the vibrator to vibrate in a second direction perpendicular to the first direction
Implementation Method 2
a magnetic circuit system for driving the vibration system to vibrate and produce sound
Data Source
AI summary
The multifunctional sounding device provided by the present disclosure includes a housing body, a sounding unit and a vibration assembly. The sounding unit includes a frame, a vibration system fixed on the frame, and a magnetic circuit system that drives the vibration system to vibrate and produce sound in a first direction. The vibrator surrounds the outside of the magnetic circuit system with space. The coil assembly interacts with the magnetic circuit system to drive the vibrator to vibrate in a second direction perpendicular to the first direction. The coil assembly includes an iron core fixed to the vibrator and a coil wrapped around the iron core. The multifunctional sounding device of the present disclosure has a small thickness and low production cost.