Linear Vibration Motor Magnet Layout for Higher Rigidity
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Solution Overview
Problem
The existing linear vibration motors suffer from reduced rigidity and stability due to magnetic saturation of the iron core and a large static suction force from the magnet, leading to a small driving force and overall system instability.
Innovation Solution
A linear vibration motor design featuring a housing body with two solenoid assemblies and a vibrator with magnet assemblies connected by yokes, including a first magnet assembly between the solenoids and additional magnet assemblies on either side, along with an elastic connector for improved rigidity and stability, enhancing the magnetic field and driving force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a magnet is placed at the end of the solenoid, then the static suction force increases, but the overall rigidity of the system decreases and stability is affected
Solution Approach 1:
The single magnet at the solenoid end is segmented into multiple magnets distributed around the solenoid assembly. The patent uses at least three magnets (first, second, and third magnets) positioned at different locations, with the first magnet having its magnetization direction parallel to the solenoid axis while the second and third magnets have magnetization directions perpendicular to the axis. This segmentation distributes the magnetic force more evenly, maintaining static suction force while improving system rigidity and stability.
2Force
If the iron core has a large number of turns, then the magnetic circuit driving force increases, but the iron core reaches magnetic saturation when current is large
Solution Approach 1:
Different magnets are assigned different magnetization directions to create localized magnetic field optimizations. The first magnet's magnetization is parallel to the solenoid axis, while the second and third magnets have perpendicular magnetization. This local quality differentiation allows the magnetic circuit to operate more efficiently without saturating the iron core, as the magnetic flux is distributed through different paths rather than concentrating through a single high-turn configuration.
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 solution increases the driving force and reduces magnetic saturation, thereby enhancing the overall rigidity and stability of the system by effectively utilizing the magnetic field and distributing the driving force more evenly.
Implementation Method 1
a stator including at least two solenoid assemblies with parallel axes, electrifying in a same direction
Implementation Method 2
the first magnet assembly being located between two adjacent at least two solenoid assemblies... Magnetization directions of the first magnet and the second magnet are opposite and parallel to an axial direction of the solenoid assembly
Implementation Method 3
an elastic connector suspending the vibrator in the housing body
Implementation Method 4
the first magnet assembly... including a first magnet and a second magnet arranged in a row. Magnetization directions of the first magnet and the second magnet are opposite and parallel to an axial direction of the solenoid assembly
Data Source
AI summary
One of the objects of the present disclosure is to provide a linear vibration motor which improves the rigidity of the whole system and ensures enhanced stability. The present disclosure provides a linear vibration motor having a housing body; a stator including at least two solenoid assemblies with parallel axes; a vibrator installed in the housing body; and an elastic connector suspending the vibrator in the housing body. The vibrator includes a first magnet assembly being located between two adjacent at least two solenoid assemblies and including a first magnet and a second magnet. Magnetization directions of the first magnet and the second magnet are opposite and parallel to an axial direction of the solenoid assembly.