Linear Vibration Motor Push-Pull Structure for Stronger Force
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Solution Overview
Problem
Conventional micro vibration motors in portable electronic devices suffer from weak vibration force due to limited magnetic field force and non-constant response speed, leading to unbalanced vibration.
Innovation Solution
A linear vibration motor design incorporating a push-pull structure with symmetrically disposed push-pull magnets and coils provides additional driving force for the vibrator's reciprocating motion, enhancing vibration force without increasing the motor's volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If only magnetic field force between vibrator and coil is used for driving vibration, then the motor structure remains simple, but the vibration force becomes weak
Solution Approach 1:
The motor is divided into two independent driving systems: a conventional vertical driving system (coil and vibrator) and a new horizontal push-pull driving system (push-pull coils and push-pull magnets). Each system operates independently to provide different components of vibration force, allowing the horizontal push-pull structure to enhance vibration force without complicating the original vertical driving mechanism.
Solution Approach 2:
The invention transitions from a single-dimensional vertical vibration mechanism to a two-dimensional driving system by adding horizontal push-pull motion. The push-pull magnets are arranged horizontally at both ends of the vibrator, and the push-pull coils generate horizontal magnetic forces that complement the vertical magnetic forces, creating bidirectional driving capability that significantly enhances overall vibration force.
2Speed
If magnetic field force is the only driving force, then the motor structure remains compact, but the response speed becomes non-constant causing non-linear vibration
Solution Approach 1:
The driving force is segmented into two independent components: vertical magnetic force from the conventional coil-vibrator interaction and horizontal push-pull force from the push-pull coil-magnet interaction. This segmentation allows each system to be optimized independently for constant response speed, with the horizontal push-pull system providing additional stabilizing force that compensates for variations in the vertical system.
Solution Approach 2:
The invention changes the driving mechanism by introducing a new horizontal driving parameter (push-pull magnetic force) that operates independently from the vertical magnetic force. This additional degree of freedom allows for better control of the vibrator's motion characteristics, maintaining more constant response speed throughout the vibration cycle and improving overall vibration balance.
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 push-pull structure significantly improves the vibration force and balance of the motor by providing a consistent driving force parallel to the stator plane, addressing the limitations of conventional designs.
Implementation Method 1
the push-pull coils and the push-pull magnets generate push-pull forces in a horizontal direction, which provides a driving force for a reciprocating motion of the vibrator
Implementation Method 2
the force driving the vibrator to vibrate is only provided by the magnetic field force between the vibrator and the coil
Data Source
AI summary
A linear vibration motor comprising a housing, a vibrator, and a stator fixed on the housing and arranged parallel to the vibrator, push-pull magnets (4) are symmetrically disposed at two ends of the vibrator; push-pull coils (2) surrounding the push-pull magnets are fixedly disposed on the housing at positions corresponding to the push-pull magnets; after the push-pull coils are energized, the push-pull coils and the push-pull magnets generate push-pull forces in a horizontal direction, which provides a driving force for the reciprocating motion of the vibrator in a direction parallel to the plane in which the stator is located. The push-pull structure provides push-pull force for the reciprocation motion of the vibrator, so that an intense vibration force can be achieved.