Linear Vibration Motor Copper Ring Damping for Higher Driving Force
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Solution Overview
Problem
Existing linear vibration motors in mobile electronics suffer from low production efficiency and automation due to manual insertion of damping materials, resulting in insufficient driving force and vibration performance.
Innovation Solution
A linear vibration motor design featuring a casing with a copper ring, a magnetic steel assembly, and an elastic member, where the copper ring provides electromagnetic damping and the magnetic steel assembly enhances magnetic field strength, allowing for automated production and improved vibration performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If foam damping member is manually inserted into the linear vibration motor, then the vibration motor achieves damping function, but the production efficiency is low and automation degree is poor
Solution Approach 1:
The patent replaces the mechanical foam damping member with an electromagnetic damping system consisting of a copper ring and magnetic steel assembly. This substitution enables automated production because the electromagnetic components can be precisely positioned and fixed using automated assembly equipment, eliminating the manual insertion process while achieving both high automation degree and production efficiency.
Solution Approach 2:
The patent changes the damping mechanism from mechanical (foam) to electromagnetic (copper ring with magnetic steel). This parameter change allows the damping function to be achieved through electromagnetic induction and eddy currents, which can be controlled and assembled automatically, thereby improving both automation degree and production efficiency simultaneously.
2Force
If foam damping member is used in the linear vibration motor, then damping function is provided, but the driving force is small due to Ampere force only
Solution Approach 1:
The patent uses a composite structure combining copper ring and magnetic steel assembly to create an electromagnetic damping system. The copper ring generates eddy currents that interact with the magnetic steel to produce electromagnetic damping force, which combines with the Ampere force from the coil to significantly enhance the overall driving force while maintaining reliable vibration performance.
Solution Approach 2:
The patent converts the electromagnetic induction effect, which normally generates eddy currents as a byproduct, into a useful damping mechanism. The eddy currents induced in the copper ring by the magnetic steel assembly create an opposing electromagnetic force that provides effective damping, thereby enhancing vibration performance while increasing driving force.
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 significantly increases production efficiency and automation, while enhancing driving force and vibration performance by leveraging electromagnetic damping and improved magnetic field strength.
Implementation Method 1
the copper ring provides electromagnetic damping
Implementation Method 2
the magnetic steel assembly enhances magnetic field strength
Implementation Method 3
the driving force is small since it is Ampere force
Data Source
AI summary
The present disclosure provides a linear vibration motor, including a casing with an accommodation space, a vibration unit accommodated in the accommodation space, a vibration unit suspended in the accommodation space and a coil fixed on the casing and driving the vibration unit to vibrate. The casing includes a copper ring arranged around the vibration unit. In the linear vibration motor provided by the utility model, the copper ring is arranged around the vibration unit to provide a damping function for the linear vibration motor. Compared with the foam damping member in the related art, the linear vibration motor provided by the present disclosure may be arranged by an automatic device during the production and manufacture of the linear vibration motor, thereby greatly improving the production efficiency, and improving the automation degree.