Double Resonance Vibration Motor for Compact Dual-Direction Control
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Solution Overview
Problem
Traditional vibration motors in portable consumer electronic products have only one resonance frequency, requiring two motors for dual resonance capabilities, which increases space usage and contradicts the trend of minimizing terminal size.
Innovation Solution
A double resonance vibration motor design featuring a housing with a vibration part supported by elastic connectors, including a mass block with two magnet groups and a coil that generates driving forces in orthogonal directions, allowing for independent resonance frequencies in the X and Y directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two vibration motors are used to achieve dual resonance frequencies, then the resonance frequency requirement is met, but the space occupied increases
Solution Approach 1:
The patent combines two vibration systems into a single integrated structure where two magnet groups and two coil groups share a common housing and support structure. This merging allows the device to achieve dual resonance frequencies while occupying the space of only one motor, directly resolving the technical contradiction between functionality and space efficiency
Solution Approach 2:
The single vibration motor housing is designed to accommodate multiple vibration systems that can operate at different resonance frequencies. The universal structure allows one device to perform multiple functions (generating different resonance frequencies) that traditionally required separate dedicated devices
2Area of stationary object
If a single vibration system is used, then the space is minimized, but only one resonance frequency is achieved
Solution Approach 1:
The single vibration system is segmented into two independent vibration subsystems, each with its own magnet group and coil group. These segments can be independently controlled to produce different resonance frequencies, allowing one physical motor to deliver the adaptability of multiple motors while maintaining minimal space occupation
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
Enables dual resonance frequencies with a single vibration motor, reducing space requirements and enhancing vibration control in different directions while maintaining stability and efficiency.
Implementation Method 1
a coil (104) fixed in the housing and two magnet groups (103B, 103C) arranged in the vibration part (103), wherein the coil (104) generates driving forces in two orthogonal directions
Implementation Method 2
an elastic connector to support elastically the vibration part (103) in the housing
Implementation Method 3
a double resonance vibration motor design featuring a housing with a vibration part supported by elastic connectors
Data Source
AI summary
A double resonance vibration motor includes a housing, vibration parts in the housing, a coil fixed in the housing, and elastic connectors to support elastically the vibration part. The vibration parts include a mass block, a first magnet group and a second magnet group installed in the mass block. The coil is opposite to the first magnetic group and the second magnetic group. The driving force generated by the first magnetic group and the coil makes the vibration motor vibrate along the first direction. The driving force of the second magnet group and the coil makes the vibration motor vibrate along the second direction. The first direction and the second direction intersect. Two different directions have respectively one resonance frequency. Two different resonant frequencies can vibrate alone or at the same time, to realize the control in different vibration directions.