Linear Vibration Motor Magnetic Spring Structure for Longer Service Life
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Solution Overview
Problem
Conventional linear vibration motors suffer from fatigue life and stress concentration issues in their spring structures, leading to spring fracture and motor failure, which compromises their reliability and service life.
Innovation Solution
A linear vibration motor structure utilizing magnetic springs formed by first and third steel magnets to provide elasticity, eliminating the need for tangible springs and enhancing the motor's reliability and service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spring structure is used to provide restoring force for vibration, then the motor can achieve vibration function, but fatigue life and stress concentration occur leading to spring fracture and motor failure
Solution Approach 1:
The patent replaces the traditional mechanical spring structure with a magnetic spring system. The magnetic spring consists of magnetic components that generate elastic restoring force through magnetic field interaction rather than mechanical deformation. This substitution eliminates the fatigue and stress concentration problems inherent in mechanical springs while maintaining the vibration restoring force function.
Solution Approach 2:
The patent changes the physical state and properties of the spring system by transitioning from a solid mechanical spring to a magnetic field-based system. The magnetic spring's elastic properties are determined by magnetic field strength and magnetic component characteristics rather than material elasticity and geometric shape, fundamentally altering the parameter space in which the spring function operates.
2Reliability
If a magnetic spring is used to replace the spring structure, then fatigue life and stress concentration are avoided, but the device complexity increases due to multiple magnet arrangements
Solution Approach 1:
The patent integrates the magnetic spring components directly into the existing motor structure. The magnetic spring components are combined with the stator, rotor, and magnetic circuit elements, so that multiple functions (vibration restoration, magnetic field generation, and structural support) are achieved by unified components rather than separate add-on elements.
Solution Approach 2:
The magnetic components in the patent serve multiple functions simultaneously: they generate the magnetic field for vibration actuation, provide the elastic restoring force for vibration restoration, and form part of the magnetic circuit. This multi-functionality reduces the need for dedicated components and simplifies the overall structure despite the advanced mechanism.
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 magnetic spring design prevents motor failure due to fatigue and stress concentration, improving product reliability and extending service life by avoiding spring-related failures.
Implementation Method 1
The magnetic spring includes a plurality of first steel magnets and a plurality of third steel magnets. The plurality of third steel magnets are arranged on two sides of the vibrator assembly. The plurality of first steel magnets are arranged at positions corresponding to the third steel magnets in the casing and the lower bracket.
Data Source
AI summary
Disclosed are a linear vibration motor structure with a long service life, comprising a lower bracket, wherein a stator assembly is connected above the lower bracket; a vibrator assembly is sheathed outside the stator assembly; a casing is sheathed outside the vibrator assembly; the casing is connected above the lower bracket; the vibrator assembly is connected to the casing and the lower bracket by means of magnetic springs; and each magnetic spring comprises several first magnets and several third magnets. An implementation method for a linear vibration motor structure with a long service life is further disclosed. According to the present invention, the vibrator assembly is connected to the casing and the lower bracket by means of the magnetic springs, and the first magnets and the third magnets repel each other so as to form a magnetic spring with a spring-like effect, by means of which the use of a tangible spring in the motor can be avoided, such that a product will not fail due to the fatigue life and stress concentration of the tangible spring, thereby improving the reliability of the product and making the product have a long service life.