Linear Vibrating Motor Push-Pull Structure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional micro vibrating motors in portable electronics suffer from unbalanced vibration due to unequal driving forces from the magnet and stator coil, leading to non-linear vibration changes and impact on the balance of electronic products.
Innovation Solution
A linear vibrating motor design incorporating a push-pull structure with a push-pull magnet and coil, enhancing the magnetic field and providing an initial driving force for reciprocating motion, while reserving space for elastic support members, and utilizing a magnetic induction block to stabilize the vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a conventional micro vibrating motor uses only magnetic field force between the vibrator and coil for driving, then the structure is simple, but the vibration sense is relatively smaller and the response speed is non-uniform
Solution Approach 1:
The driving force system is segmented into two independent parts: a push-pull structure (with push-pull magnet and push-pull coil) for initial driving force, and a magnetic field force (between vibrator magnet and stator coil) for continuous vibration. This segmentation allows each part to optimize its function, resolving the contradiction between structural simplicity and vibration effectiveness.
Solution Approach 2:
The patent merges two driving mechanisms (push-pull electromagnetic force and magnetic field force) into a unified vibration system. The push-pull structure provides initial impulse while the magnetic field force sustains vibration, combining advantages of both approaches to achieve uniform response speed and enhanced vibration sense without excessive complexity.
2Force
If the push-pull structure is positioned to maximize magnetic field reuse and push-pull force, then vibration sense is enhanced, but space for elastic support members is reduced
Solution Approach 1:
The push-pull structure is repositioned from a vertical arrangement to a horizontal arrangement along the vibration direction. This dimensional change allows the push-pull magnet to be located at one end of the vibrator while elastic support members are positioned at both ends, maximizing both push-pull force through magnetic field reuse and design space for support members simultaneously.
3Speed
If the position of the vibrator changes relative to the coil during vibration, then the magnetic field force varies, but this causes non-uniform response speed and non-linear vibration
Solution Approach 1:
The push-pull structure provides an initial driving force that pre-positioned the vibrator at optimal starting points for each vibration cycle. This preliminary action compensates for the varying magnetic field force during vibration, ensuring uniform response speed and linear vibration characteristics throughout the motion range.
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 sense and balance by reusing the magnetic field, providing a more uniform and proportional force, resulting in improved vibration quality and space optimization for elastic support members.
Implementation Method 1
The push-pull coil generates a push-pull force in a horizontal direction together with the push-pull magnet after being electrified to provide the push-pull force for a reciprocating motion of the vibrator
Implementation Method 2
An interaction force for enhancing a magnetic field is generated between the push-pull magnet and an adjacent permanent magnet
Implementation Method 3
The vibrating block comprises a permanent magnet
Implementation Method 4
an elastic support member which is connected to the upper cover and enables the vibrator to perform the reciprocating vibration
Data Source
AI summary
The present application provides a linear vibrating motor comprising a housing, a vibrator and a stator that is secured to the housing and is parallel to the vibrator, the vibrator comprises a mass block and a vibrating block embedded in the middle of the mass block; the vibrating block includes a permanent magnet; push-pull structures adjoin two ends of the vibrating block respectively; the push-pull structure comprises a push-pull magnet embedded in the mass block and a push-pull coil secured to the housing; an interaction force for enhancing a magnetic field is generated between the push-pull magnet and an adjacent permanent magnet; and the push-pull coil generates a push-pull force in a horizontal direction together with the push-pull magnet after being electrified to provide an initial driving force for a reciprocating motion of the vibrator in a direction that is parallel to a plane where the stator is located.