Vibration Motor With Dual Vibrators and Magnetic Conductive Sheet
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Solution Overview
Problem
Existing vibration motors in portable consumer electronics have limited performance and short service life due to a simple magnetic circuit structure and low magnetic coefficient, requiring increased voltage for better vibration, which compromises circuit reliability.
Innovation Solution
A vibration motor design featuring two vibrators with interacting magnetic circuits and coils, where one vibrator is equipped with a magnetic circuit and the other with a coil, generating driving forces in opposite directions to enhance vibration and improve magnetic efficiency through optimized weight and magnetic configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the voltage is increased to achieve better vibration feeling, then the vibration performance is improved, but the circuit reliability deteriorates
Solution Approach 1:
The patent changes the magnetic circuit parameters by introducing a magnetic conductive sheet and optimizing the magnetic circuit structure, which increases the BL value (magnetic coefficient). This allows achieving better vibration performance without increasing voltage, thus resolving the contradiction between vibration performance and circuit reliability
Solution Approach 2:
The patent uses a magnetic conductive sheet as a composite material component in the magnetic circuit structure. This sheet enhances the magnetic field distribution and increases the BL value, enabling improved vibration performance while maintaining safe operating voltage levels and circuit reliability
2Device complexity
If a simple magnetic circuit structure is used, then the device complexity is reduced, but the magnetic coefficient becomes small
Solution Approach 1:
The patent applies local quality improvement by adding a magnetic conductive sheet at specific locations within the magnetic circuit where magnetic field enhancement is needed. This localized enhancement increases the BL value without requiring a complete redesign of the entire magnetic circuit structure, thus maintaining relative simplicity while improving magnetic coefficient
3Device complexity
If only one vibrator is used, then the device complexity is reduced, but the vibration performance is limited
Solution Approach 1:
The patent segments the vibration system into two independent vibrators (first vibrator and second vibrator) that can move relative to each other. Each vibrator has its own driving force generation mechanism, allowing independent optimization of vibration characteristics and achieving superior overall vibration performance while maintaining manageable device complexity
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 design achieves improved vibration feeling and reliability by enhancing the magnetic efficiency and reducing the need for increased voltage, thereby extending the service life and performance of the vibration motor.
Implementation Method 1
One of the first vibrator and the second vibrator is provided with a magnetic circuit, and the other one is provided with a coil corresponding to the magnetic circuit. The coil and the magnetic circuit interact during the energization process to generate driving forces in opposite directions on the first vibrator and the second vibrator respectively
Data Source
AI summary
The present disclosure provides a vibration motor. The vibration motor includes a first vibrator and a second vibrator which perform relative moved. One of the first vibrator and the second vibrator is provided with a magnetic circuit, and the other one is provided with a coil corresponding to the magnetic circuit. The coil and the magnetic circuit interact to generate a driving force to drive the relative moved of the first vibrator and the second vibrator. A BL value of the magnetic circuit can be effectively improved, a better vibration feeling can be achieved, and the circuit reliability can be improved.