Linear Vibration Motor with Segmented Magnet and Iron Core
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing linear vibration motors for portable electronic devices do not fully utilize the driving force of the solenoid and magnet, resulting in suboptimal vibration feedback.
Innovation Solution
The design includes a weight with a receiving hole and an iron core fixed to its side wall, a coil wound around the iron core, and a magnet arranged perpendicular to the vibrating direction, with multiple magnets and a three-section magnetizing structure to enhance magnetic field performance, and an adhesive receiving groove for improved fixation of the iron core.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the solenoid and magnet are used in the conventional configuration, then the structure is simple, but the driving force is not fully utilized and vibration performance is suboptimal
Solution Approach 1:
The magnet is divided into multiple segments (first magnet, second magnet, third magnet) with different magnetizing directions. This segmentation allows each magnet to contribute differently to the magnetic field distribution, maximizing the utilization of driving force while maintaining a manageable structural complexity through modular arrangement.
Solution Approach 2:
Different regions of the magnet assembly have different magnetizing directions (first direction for first magnet, second direction for second magnet, third direction for third magnet). This local quality variation optimizes the magnetic field distribution in different spatial zones, enabling full utilization of the driving force throughout the vibration assembly.
2Force
If the magnet is arranged perpendicular to the vibrating direction, then the magnetic field intensity is enhanced, but the spatial arrangement becomes more complex
Solution Approach 1:
The magnet arrangement extends into multiple spatial dimensions with magnets positioned at different locations and oriented in different directions (first, second, and third directions). This multi-dimensional arrangement enhances magnetic field intensity throughout the receiving hole while distributing the structural complexity across different spatial planes.
Solution Approach 2:
The magnet configuration uses asymmetric arrangement with magnets positioned at specific locations around the receiving hole and oriented in different directions. This asymmetric design optimizes magnetic field distribution for maximum driving force while accepting the resulting complex spatial arrangement as necessary for performance.
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 significantly increases the driving force and vibration performance of the linear vibration motor by optimizing electromagnetic field utilization and magnetic field intensity.
Implementation Method 1
The solenoid interacts with the magnet to generate a driving force to drive the vibration assembly to vibrate back and forth
Implementation Method 2
The coil wound around the iron core and the magnet extends into the receiving hole and is spaced from the coil and the weight
Data Source
AI summary
A linear vibration motor, including a housing having a receiving space; a vibration assembly and a stator assembly that are received in the receiving space; and an elastic member supporting the vibration assembly in the receiving space. The vibration assembly includes a weight suspended in the receiving space, and the weight has a receiving hole penetrating through the weight. The vibration assembly further includes an iron core fixed to the weight and received in the receiving hole, and a coil wound around the iron core; and the stator assembly includes a magnet fixed to the housing, and the magnet extends into the receiving hole and is spaced from the coil and the weight. The linear vibration motor has an improved electromagnetic field utilization rate of the iron core and the coil and enhanced magnetic field intensity of the magnet, and an improved driving force and vibration performance.