具备双线圈的线性震动电机
The linear vibration motor design, which optimizes the magnetic field distribution by using parallel double coils and a yoke, solves the problems of nonlinear driving force and magnetic saturation in existing technologies, achieving higher control accuracy and stability, and extending service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG BAOLONG M&E CO LTD
- Filing Date
- 2025-07-25
- Publication Date
- 2026-07-17
AI Technical Summary
The driving force of existing linear vibration motors exhibits strong nonlinearity with displacement, and the magnetic reluctance and magnetic attraction are relatively large, resulting in unstable operation and low control accuracy. Excessive magnetic field strength of permanent magnets can easily lead to magnetic saturation, affecting the control accuracy and efficiency of the structure.
It adopts a dual-coil structure, with the coils wound on the connecting part and the protruding part of the iron core respectively, and set in parallel. Combined with the iron core design of stacked yoke iron and silicon steel sheets, it optimizes the magnetic field distribution and magnetic field superposition, reduces magnetic reluctance fluctuation, enhances magnetic field control capability, and reduces the risk of magnetic saturation.
It improves the smoothness and control precision of motor operation, reduces vibration and noise, enhances the linearity and response speed of driving force, extends service life, meets driving force requirements, and takes into account miniaturization design.
Smart Images
Figure CN224520803U_ABST
Abstract
Claims
1. A linear vibration motor with dual coils, comprising a housing, an iron core and a mass block disposed within the housing, a mating hole being formed at the center of the mass block, the mass block being sleeved around the iron core through the mating hole, a permanent magnet being disposed between the mating hole and the iron core, the permanent magnet being fixedly connected to the mating hole, characterized in that: The iron core includes a connecting part, a transition part, and a protrusion connected in sequence. The iron core is connected to the housing through the connecting part. Coils are wound on the connecting part and the protrusion respectively, and the coils on the connecting part and the protrusion are arranged in parallel.
2. The linear vibration motor with double coils according to claim 1, wherein: A yoke is fitted onto the transition section of the iron core, and the yoke is positioned between the two coils.
3. The linear vibration motor with double coils according to claim 2, characterized in that: The yoke is made of stacked silicon steel sheets.
4. The linear vibration motor with double coils according to claim 3, characterized in that: Long slots are provided on both sides of the iron core.
5. The linear vibration motor with double coils according to claim 4, wherein: Mounting holes are provided on the end face of the housing corresponding to the position of the iron core, and the iron core is fixedly connected in the mounting holes.
6. The linear vibration motor with double coils according to claim 5, characterized in that: The iron core is made up of several stacked iron sheets.
7. The linear vibration motor with double coil according to claim 1, wherein: The spring is configured as two pieces, and a through hole is provided at the center of the spring. The iron core passes through the through hole, and the diameter of the through hole is larger than the diameter of the coil.
8. The linear vibration motor with double coils according to claim 7, characterized in that: A connecting platform is provided on the housing corresponding to the spring contact position, and a positioning platform is provided on the mass block corresponding to the spring contact position. The spring is inclined between the connecting platform and the positioning platform.
9. The linear vibration motor with double coils according to claim 8, characterized in that: A deformation groove is formed on the housing corresponding to the position of the connecting platform.