Linear Vibration Motor Copper Ring Damping for Balanced Actuation
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Solution Overview
Problem
Existing linear vibration motors in mobile devices face inefficiencies in manufacturing due to non-automated foam damper assembly and insufficient resistance, particularly when dealing with high actuating forces.
Innovation Solution
A linear vibration motor design featuring a copper ring and iron core with a magnetic conductive plate, where the copper ring and coil are arranged on opposite sides of the vibrator, providing electromagnetic resistance and improved actuation force, and the magnetic conductive plate balances vibrations by generating a reverse force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If foam is used as a damper in the linear vibration motor, then the assembly process can be completed, but the assembly is non-automated and inefficient, and the resistance provided is insufficient for high actuating force motors
Solution Approach 1:
The patent removes the foam damper from the system and replaces it with a copper ring damper. This extraction of the problematic foam component eliminates the non-automated assembly process while providing sufficient resistance for high actuating force motors through electromagnetic damping effects.
Solution Approach 2:
The patent substitutes the mechanical foam damper with an electromagnetic damper system using a copper ring. This replacement enables automated assembly through precise positioning features while providing adequate resistance through electromagnetic interactions between the copper ring and magnetic conductive plate.
2Force
If foam is used as a damper, then the structure is simple, but the resistance provided is not enough for linear vibration motor with high actuating force
Solution Approach 1:
The patent employs a composite damping system consisting of a copper ring and a magnetic conductive plate. This combination leverages electromagnetic interactions to generate sufficient resistance for high actuating force motors, achieving the required force level without excessive structural complexity.
Solution Approach 2:
The patent changes the material parameter from foam to copper ring, which fundamentally alters the damping mechanism from mechanical to electromagnetic. This parameter change enables the system to provide adequate resistance for high actuating force applications while maintaining reasonable structural complexity through standardized geometric features.
3Reliability
If copper ring and coil are arranged on opposite sides of the vibrator, then electromagnetic resistance and actuation force are improved, but the structural complexity increases
Solution Approach 1:
The patent employs asymmetric arrangement of the copper ring and coil on opposite sides of the vibrator, optimized for their specific functional requirements. This asymmetric configuration achieves improved vibration balance and electromagnetic performance while managing structural complexity through purposeful differentiation of component positions.
Solution Approach 2:
The patent segments the stator into distinct functional zones with the copper ring and coil positioned separately on opposite sides. This segmentation allows each component to perform its specific function optimally while contributing to overall vibration balance, managing complexity through functional decomposition.
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 enhances vibration balance and actuation force while simplifying the manufacturing process through automation of the copper ring assembly, offering improved efficiency and resilience compared to traditional foam dampers.
Implementation Method 1
a copper ring and a coil both opposite to the magnet unit; the copper ring and the coil are arranged on two opposite sides of the vibrator separately along a first direction perpendicular with a vibration direction of the vibrator
Implementation Method 2
a magnetic conductive plate surrounded by the copper ring; the magnetic conductive plate balances vibrations by generating a reverse force
Data Source
AI summary
The present disclosure discloses a linear motor including a housing with an accommodation space, a vibrator and a stator received in the accommodation space and an elastic support fixed on the vibrator and configured to suspend the vibrator in the accommodation space; the stator includes a coil and a copper ring both opposite to the vibrator; the copper ring and the coil are arranged on two opposite sides of the vibrator separately along a first direction perpendicular with a vibration direction of the vibrator. The copper ring serves as a damper providing electromagnetic resilience for the vibrator, effectively improve the automation and efficiency of the manufacture of the linear vibration motor.