Linear vibration motor

Abstract

The invention discloses a linear vibration motor, which comprises a housing with an accommodating space, a vibration assembly and a stator assembly, wherein the vibration assembly and the stator assembly are opposite in peripheral surface and arranged in the accommodating space in a mutually contactless manner, two ends of the vibration assembly are elastically connected with the inner wall of thehousing, and the stator assembly is fixedly connected with the inner wall of the housing; the stator assembly and the inner wall of the housing are further provided with one or more magnetic conductive sheets therebetween, the stator assembly comprises a flexible circuit board and a coil, the coil is arranged at the side, which faces towards the vibration assembly, of the flexible circuit board,and the one or more magnetic conductive sheets is or are arranged on the side, which is back to the vibration assembly, of the flexible circuit board. Magnetic induction lines are guided and enabled to be concentrated, thereby providing an enough driving force when the linear vibration motor is started, providing a great damping force when the linear vibration motor is stopped at the same time, and enabling the vibration motor to be quickly started and stopped. Therefore, more vibration mode design space is provided for the vibration motor so as to meet the ever-increasing market requirements.

Description

technical field [0001] The invention belongs to the field of miniature vibration motors, in particular to a linear vibration motor. Background technique [0002] At present, mobile consumer electronics products on the market generally use vibration motors as system feedback components, such as incoming call prompts for mobile phones, vibration feedback for game consoles, and so on. Existing vibration motors on the market mainly include cylindrical iron core motors, coreless motors and linear motors. Cylindrical iron core motors and coreless motors not only have complex structures, large thickness, and many manufacturing processes, but also have high motor noise and poor control accuracy, so they are rarely used. However, linear motors vibrate smoothly and are widely used in consumer electronics. For the application of horizontal linear vibration motors on the market, the vibrating block and the elastic elements at both ends of the vibrating block are generally arranged in ...

AI Technical Summary

Problems solved by technology

However, in actual use, due to the fact that the magnetic induction lines are not restrained and dispersed, the effective utilization rate of the magnetic field is low, resulting in insufficient magnetic field driving force of the energized coil, and the starting and stopping time of the motor is relatively long

In order to solve the above problems, the existing linear motors generally use the upper cover plate on the mass block as a magnetically conductive sheet. However, since there is only a single layer of magnetically conductive material, it cannot provide sufficient driving force for the motor, so that it cannot achieve fast start and stop

Another prior art is to add a magnetically conductive sheet to the coil and the flexible circuit board. However, since the added magnetically conductive sheet is in direct contact with the coil, the coil is easily connected to the cover plate on it, and there is a problem of poor insulation. risk, and when the cover plate is made of non-magnetic material, because there is only a single layer of magnetic material, it cannot provide enough driving force for the motor, so that it cannot be started and stopped quickly, and it is difficult to meet the growing market demand

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