Linear vibration motor

Abstract

The invention discloses a linear vibration motor which comprises a stator assembly, a vibrator assembly and an elastic supporting part, wherein the stator assembly comprises a shell with an accommodating cavity and a magnet positioned in the accommodating cavity and combined and fixed with the shell; the magnet comprises a hollow part; the vibrator assembly comprises a coil arranged on a concentrating flux plate and mass blocks surrounding the periphery of the coil; the hollow part extends along a vibrating direction of the vibrator assembly; when the vibrator assembly vibrates, the coil vibrates along with the vibrator assembly and is inserted into the hollow part of the magnet; the elastic supporting part is configured to suspend the vibrator assembly in the accommodating cavity of the shell; and the concentrating flux plate further comprises a through hole which corresponds to an inner cavity of the coil and runs through the upper surface and the lower surface of the concentrating flux plate. According to the linear vibration motor provided by the invention, the structure can utilize magnetism of the magnet to the greatest extent; utilization efficiency of the coil for magnetic force lines of the magnet is promoted; an electromagnetic driving force of the motor is promoted; and the assembling process is simple and convenient, and assembling accuracy is high, so that the motor can obtain better vibration performance.

Description

technical field [0001] The invention belongs to the technical field of electronic products. More specifically, it relates to a linear vibration motor. Background technique [0002] With the development of communication technology, portable electronic devices, such as mobile phones, tablet computers, smart wearable devices, multimedia entertainment devices, etc., have become a necessity in people's lives. In these electronic devices, a miniature linear vibration motor is usually used for system feedback, such as vibration feedback when clicking a touch screen. [0003] A linear vibration motor is a component that uses the principle of electromagnetic force to convert electrical energy into mechanical vibration. Conventional linear vibration motors are usually installed in mobile communication terminals, portable terminals, etc., and are usually installed on the edge of the device, and receive vibration Vibrates in a direction perpendicular to the object. [0004] Existing ...

AI Technical Summary

Problems solved by technology

[0005] However, the existing linear vibration motor has the following defects. 1. The utilization efficiency of the magnetic force lines of the magnet is low, which affects the overall tactile experience

2. The assembly process of the existing motor is complicated, especially when the coil and the mass block are assembled as vibration components, an external positioning tool is required between the two to ensure coaxial assembly, the assembly steps are cumbersome, and it is difficult to control the assembly accuracy

3. The existing linear vibration motor is only suitable for vibration experience at a single frequency point, and does not meet the application requirements for tactile feedback of multi-frequency point vibration

Images