Linear Vibration Motor Magnetic Suspension
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional linear vibration motors face limitations in miniaturization due to restricted vibration intensity and are prone to elastic failures and fatigue, affecting their performance and service life in portable electronic devices.
Innovation Solution
A linear vibration motor design featuring a magnetic vibrating part suspended between two magnets and an electromagnet, utilizing a changing magnetic field to drive reciprocal movements, enhancing vibration intensity while maintaining miniaturization and reducing elastic element reliance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the size of the linear vibration motor is enlarged to increase vibration intensity, then the vibration intensity is improved, but the miniaturization of the vibration motor is degraded
Solution Approach 1:
The patent replaces the traditional mechanical elastic element suspension system with a magnetic field-based suspension system. The vibrating part is suspended between two magnets (first magnet and second magnet) that provide magnetic repulsion forces, eliminating the need for mechanical elastic elements. This substitution allows for more precise control of the vibrating part's position and movement, enabling enhanced vibration intensity without increasing motor size.
Solution Approach 2:
The patent changes the physical parameters of the magnetic field interaction by using two magnets with specific polarities arranged on opposite sides of the vibrating part. By controlling the magnetic field strength and distribution through the coil winding on the magnetic core, the system can precisely adjust the vibration intensity while maintaining a compact structure. The magnetic repulsion force between the magnets and the vibrating part provides the necessary driving force without requiring larger dimensions.
2Reliability
If elastic elements are used to support the vibrating part, then the vibrating part is suspended and supported, but elastic failures and fatigues occur after long-time use affecting performance and service life
Solution Approach 1:
The patent replaces the mechanical elastic element suspension system with a magnetic field-based suspension system. The vibrating part is suspended between two magnets (first magnet and second magnet) that provide magnetic repulsion forces, eliminating the need for mechanical elastic elements. This substitution removes the source of elastic fatigue and failure, significantly improving the reliability and service life of the vibration motor.
Solution Approach 2:
The magnetic field suspension system is self-regulating and requires no maintenance. The magnetic repulsion forces automatically adjust to keep the vibrating part in its proper position without wear or degradation over time. The system uses the electromagnetic force generated by the coil and magnets to continuously support and control the vibrating part, eliminating the need for replacement of elastic elements.
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 achieves improved vibration intensity and extended service life by leveraging magnetic forces for precise control and balanced movement, minimizing the impact of elastic failures and enabling more compact designs for portable electronics.
Implementation Method 1
A coil 42 is winded on the magnetic core 41... As the coil 42 is provided with a changing current so as to form a magnetic field which changes according to the current in the coil 42
Implementation Method 2
The elastic element provides driving force to the vibrating part according to the electromagnetic force (which is known as Lorentz force) applied on the vibrating part
Implementation Method 3
A first magnet 21 is fixed on the lateral side 121a... A second magnet 22 is connected to the magnetic core 41... The magnetic vibrating part 7 magnetically repulses with the first magnet 21 and the second magnet 22
Data Source
AI summary
A linear vibration motor is provided in the present disclosure the linear vibration motor includes a cabinet having a receiving space, a first magnet received in the accommodation space and fixed in the cabinet; a magnetic core fixed in the cabinet, opposite to the first magnet, with a coil winded on the magnetic core, a vibrating part received in the receiving space, suspended between the first magnet and the magnetic core; and a supporting part for suspending the vibrating part, and the vibrating part includes a third magnet repulsing the first magnet, the coil having a changing current to magnetize the magnetic core to repulse with the third magnet.