Linear Vibration Motor with Integrated Driving Assembly
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Solution Overview
Problem
Conventional linear vibration motors require increased volume, complexity, and manufacturing costs due to the need for more permanent magnets and coils to enhance vibration performance, which complicates their integration into portable devices and increases reliability risks.
Innovation Solution
A linear vibration motor design featuring a housing with a through hole, an iron core and coil assembly, and strategically arranged permanent magnets and elastic members, which reduces thickness and complexity while improving vibration performance through optimized magnetic field distribution and structural simplicity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If more permanent magnets and coils are accommodated to improve vibration performance, then the vibration performance is improved, but the volume of the linear vibration motor increases
Solution Approach 1:
The patent combines the permanent magnets and coils into an integrated driving assembly where the coils are wound around the permanent magnets, creating a compact structure that generates strong magnetic fields without requiring separate housing for each component. This merging approach improves vibration performance while minimizing volume increase.
Solution Approach 2:
The patent arranges the permanent magnets and coils in a three-dimensional configuration within the driving assembly, utilizing spatial optimization to pack more magnetic components into a compact volume. The alternating polarity arrangement along the axial direction creates efficient magnetic field utilization without proportionally increasing the motor volume.
2Power
If more permanent magnets and coils are accommodated to improve vibration performance, then the vibration performance is improved, but the structure of the linear vibration motor becomes more complex
Solution Approach 1:
The driving assembly integrates multiple permanent magnets and coils into a single modular unit with a unified structure. The coils are wound around the permanent magnets in an alternating pattern, creating a compact assembly that reduces the number of separate components and simplifies the overall motor structure while maintaining enhanced vibration performance.
3Power
If more permanent magnets and coils are accommodated to improve vibration performance, then the vibration performance is improved, but the manufacturing cost increases
Solution Approach 1:
The integrated driving assembly design allows permanent magnets and coils to be manufactured and assembled as a single modular unit, reducing the number of separate manufacturing processes and assembly steps. This approach lowers manufacturing costs while achieving improved vibration performance through the combined magnetic components.
4Power
If more permanent magnets and coils are accommodated to improve vibration performance, then the vibration performance is improved, but the number of manufacturing processes increases leading to higher reliability risks
Solution Approach 1:
The integrated driving assembly reduces the total number of separate components and assembly operations by combining permanent magnets and coils into a unified structure. This consolidation decreases the number of manufacturing processes and assembly steps, thereby reducing cumulative reliability risks while maintaining enhanced vibration performance.
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 achieves improved vibration performance, reduced size, enhanced reliability, and lower manufacturing costs by leveraging an I-shaped iron core and efficient magnetic field utilization, ensuring safer and more reliable operation.
Implementation Method 1
The driving assembly includes an iron core and a coil, where the coil is sleeved on the middle shaft and is connected to the circuit board. The driving assembly is operative to drive the vibrator assembly to perform a reciprocating motion
Implementation Method 2
two permanent magnets, extending along the lengthwise direction of the housing, clamped in the through hole, and arranged on two sides of the driving assembly
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
Disclosed is a linear vibration motor including a housing, a vibrator assembly, and a driving assembly. The housing is provided with a circuit board. The vibration assembly is disposed in the housing. A through hole is defined in the vibration assembly along the thickness of the housing. The driving assembly is disposed in the through hole and fixedly connected to the housing. The driving assembly includes an iron core and a coil. The iron core includes an intermediate shaft extending along the length of the housing and two end blocks disposed at two ends of the intermediate shaft. The cross-sectional area of the intermediate shaft is smaller than the cross-sectional area of each of the two end blocks. The coil is sleeved on the intermediate shaft and connected to the circuit board. An external circuit is operative to transmit a driving current signal to the coil through the circuit board, so that the driving assembly can drive the vibrator assembly to perform a reciprocating motion along the length of the housing.