Linear Vibration Motor Layout for Two-Direction Haptic Motion
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Solution Overview
Problem
Existing linear vibration motors typically vibrate in a single direction, which fails to meet the requirements for multi-directional vibration.
Innovation Solution
A moving-magnet-type linear vibration motor design that includes a housing with oppositely connected elastic members, a mass block, magnets forming acute or obtuse angles, and coils arranged to decompose Lorentz forces into perpendicular directions, allowing for vibration in two mutually perpendicular directions, enhanced by Helbeck-structured magnetic steel and leaf spring structures for stable modal states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional linear vibration motor with a single-direction vibrator assembly is used, then the structure is simple, but it cannot achieve multi-directional vibration
Solution Approach 1:
The patent transitions from single-direction to multi-directional vibration by arranging two magnets and two coils at specific angles (acute or obtuse angles) relative to the connection line between elastic member centers. This angular arrangement enables the vibration motor to generate vibration forces in multiple directions, effectively adding dimensional capability to the vibration output.
Solution Approach 2:
The vibrator assembly is segmented into multiple independent components: two magnets (with opposite polarities) and two coils, each positioned at specific angles. This segmentation allows each component to contribute to different vibration directions, and through coordinated operation, achieve multi-directional vibration capability while maintaining modular structure.
2Adaptability or versatility
If magnets and coils are arranged at acute or obtuse angles to decompose Lorentz forces, then multi-directional vibration is achieved, but the magnetic field structure becomes more complex
Solution Approach 1:
The patent employs asymmetric angular arrangements of magnets and coils relative to the connection line between elastic members. By positioning them at acute or obtuse angles rather than symmetrically, the design creates asymmetric force decomposition that enables multi-directional vibration control, leveraging the asymmetric geometric configuration to achieve versatile vibration patterns.
Solution Approach 2:
The patent utilizes parameter changes in the angular positions of magnets and coils to control vibration directions. By adjusting the angles at which magnets and coils are arranged relative to the elastic member connection line, the system can decompose Lorentz forces into different directional components, enabling dynamic control over vibration direction without changing the physical structure.
3Force
If Helbeck-structured magnetic steel assemblies are used, then magnetic field strength is enhanced, but manufacturing precision requirements increase
Solution Approach 1:
The patent employs Helbeck-structured magnetic steel assemblies, which are composite magnetic structures designed to generate strong magnetic fields. These composite magnetic materials are arranged in specific patterns (with opposite polarities for adjacent magnets) to enhance the overall magnetic field strength, providing sufficient driving force for the vibration motor while managing the complexity through standardized composite material usage.
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 stronger vibration feel and multi-directional vibration capabilities by decomposing Lorentz forces and utilizing strong magnetic fields, with improved stability and protection of components through embedded magnets and supporting blocks.
Implementation Method 1
two coils, fixed on the housing and respectively spaced apart from a corresponding one of the magnets, and forming an acute angle or an obtuse angle with respect to a connection line between the centers of the two elastic members... Lorentz forces acted on the two coils have the same direction
Implementation Method 2
two elastic members, oppositely connected on side walls of the housing; a mass block, hung inside the accommodation space of the housing through circumferential wall respectively connected with the two elastic members
Data Source
AI summary
The present disclosure provides a moving-magnet-type linear vibration motor that comprises a housing, having an accommodation space; two elastic members, oppositely connected on side walls of the housing; a mass block, hung inside the accommodation space of the housing through circumferential wall respectively connected with the two elastic members; two magnets, respectively fixedly connected with two sides of the mass block, and forming an acute angle or an obtuse angle with respect to a connection line between the centers of the two elastic members; two coils, fixed on the housing and respectively spaced apart from a corresponding one of the magnets, and forming an acute angle or an obtuse angle with respect to the connection line between the centers of the two elastic members.