Vibration Exciter Magnetic Circuit Layout for Stronger Driving Force
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electromagnetic exciters for electronic products with full screens have low magnetic field utilization rates and small driving forces due to their design, which limits their effectiveness in generating vibrations for sound production without the need for holes in the front surface.
Innovation Solution
A vibration exciter design featuring a magnetic circuit assembly with a central magnet and side magnets arranged to maximize magnetic induction lines passing through coils, enhancing the magnetic field density and utilization, and a dual casing structure to house the coils and magnetic circuit assembly, allowing for improved ampere force and driving force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the existing electromagnetic exciter design is used, then the structure is simple, but the magnetic field utilization rate is low and the driving force is small
Solution Approach 1:
The magnetic circuit assembly is segmented into multiple magnets (first magnet, second magnet, third magnet, fourth magnet) arranged in a specific configuration. This segmentation allows each magnet to contribute to the magnetic field in a controlled manner, improving overall magnetic field utilization and generating stronger driving force on the coils.
Solution Approach 2:
The magnets are arranged in a two-dimensional configuration with specific orientations (first and second directions perpendicular to each other). This dimensional arrangement creates a more complex three-dimensional magnetic field distribution that passes more effectively through the coils, thereby improving magnetic field utilization rate and driving force.
2Loss of energy
If the magnetic circuit assembly with multiple magnets is used, then the magnetic field utilization rate is improved, but the device complexity increases
Solution Approach 1:
Multiple magnets are merged into a single magnetic circuit assembly that functions as one integrated unit. The magnets are positioned and oriented to work together, creating a unified magnetic field that passes through the coils. This merging approach improves magnetic field utilization while keeping the overall structure manageable as a single assembly rather than separate components.
3Force
If the coil arrangement on two sides of the magnetic circuit assembly is used, then the driving force is enhanced, but the device complexity increases
Solution Approach 1:
The coils are arranged asymmetrically on two sides of the magnetic circuit assembly, with each coil positioned to interact with the magnetic field from multiple magnets. This asymmetric arrangement optimizes the interaction between the magnetic field and the coils, generating enhanced driving force while the symmetry of having two coils on opposite sides maintains a degree of structural 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
The improved magnetic field density and utilization lead to a stronger, more balanced driving force, enabling more stable and intense vibrations, thus enhancing the vibration exciter's performance and efficiency in electronic products.
Implementation Method 1
the magnetic circuit assembly comprises a central magnet and at least two side magnets... magnetizing directions of the at least two side magnets are parallel to an axial direction of the coils... density of magnetic induction lines generated by the magnetic circuit assembly is more aggregated, thus more effective magnetic induction lines can pass through the coils
Implementation Method 2
more effective magnetic induction lines can pass through the coils, such that driving force of the vibration exciter is improved
Data Source
AI summary
A vibration exciter for an electronic product comprises a first vibration assembly comprising a first casing (101) and a magnetic circuit assembly below thereof; a second vibration assembly comprising a second casing (105) and at least two groups of coils (102) above thereof and on two sides of the magnetic circuit assembly; the magnetic circuit assembly comprises a central magnet (103b) and at least two side magnets (103a, 103b) in a vibration direction, the magnetizing directions of the two side magnets are parallel to an axial direction of the coils, directions of magnetic poles are opposite; the central magnet comprises at least two groups of magnets (103b, 1032b) in a direction perpendicular to the vibration direction, the magnetizing directions of the at least two groups of magnets are parallel to the vibration direction the directions of the magnetic poles are opposite. The electronic product is also disclosed.