Linear Vibration Motor Layout With Shared Magnets for Higher Driving Force
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Solution Overview
Problem
Conventional linear vibration motors face limitations in driving force due to restricted design space, making it difficult to meet design requirements when increasing the thickness of magnets or pole plates.
Innovation Solution
A linear vibration motor design featuring multiple driving assemblies with shared magnets and pole plates, utilizing a multi-magnetic-circuit scheme to enhance driving force while maintaining a compact size, and reducing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the magnet or pole plate is thickened to increase driving force, then the driving force increases, but the height of the product increases
Solution Approach 1:
Adjacent driving assemblies share common magnets and pole plates. Specifically, the magnet assembly includes first magnets arranged at two sides of the solenoid along the vibrating direction, where common magnets are shared between adjacent driving assemblies. This merging approach increases driving force through multiple magnetic interactions while avoiding the need to thicken individual magnets, thus maintaining compact height.
Solution Approach 2:
The common magnets and pole plates serve multiple functions simultaneously - they act as magnetic components for one driving assembly while also serving as structural and magnetic components for adjacent driving assemblies. This multi-functionality allows the system to achieve higher driving force without increasing overall height.
2Force
If multiple driving assemblies are added to increase driving force, then the driving force increases, but the structure becomes more complex
Solution Approach 1:
Adjacent driving assemblies share common magnets and pole plates to reduce the total number of components. The magnet assembly is designed such that first magnets at two sides of the solenoid include common magnets shared by adjacent driving assemblies, and pole plates are similarly shared, thereby reducing structural complexity while maintaining multiple driving assemblies for high driving force.
3Force
If multiple magnets and pole plates are used to increase driving force, then the driving force increases, but manufacturing cost increases
Solution Approach 1:
The design reduces the total quantity of magnets and pole plates through sharing between adjacent driving assemblies. Common magnets and common pole plates are used by multiple driving assemblies simultaneously, reducing material consumption and manufacturing cost while still achieving increased driving force through the multi-magnetic-circuit configuration.
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 driving force is significantly increased by at least 1.8 times, achieving improved performance without increasing the overall size or complexity.
Implementation Method 1
each of the at least two driving assemblies includes a solenoid fixed to the housing and a magnet assembly fixed to the inner wall of the weight and vibrating together with the weight
Implementation Method 2
the first magnets are magnetized along a direction perpendicular to the vibrating direction of the weight, the first magnets at the two sides of the solenoid have poles of a same polarity opposite to each other
Implementation Method 3
an elastic connector elastically supporting the weight
Data Source
AI summary
A linear vibration motor, including a housing, a weight suspended in the housing, at least two driving assemblies driving the weight to horizontally vibrate, and an elastic connector elastically supporting the weight. The weight includes an inner wall enclosing to form a through hole, each driving assembly includes a solenoid fixed to the housing and a magnet assembly fixed to the inner wall, the magnet assembly includes first magnets arranged at two sides of the solenoid along a vibrating direction of the weight, the first magnets are magnetized along a direction perpendicular to the vibrating direction, the first magnets at two sides of the solenoid have poles of a same polarity opposite to each other, each first magnet includes a common magnet located between two adjacent solenoids and shared by two adjacent driving assemblies. A driving force of the linear vibration motor is significantly improved.