Linear vibration motor

A linear vibration and motor technology, applied in the direction of electric components, casings/covers/supports, electrical components, etc., can solve the problems of low effective utilization of magnetic fields, insufficient magnetic field driving force of energized coils, poor insulation, etc.

Active Publication Date: 2018-07-31
SICHUAN AWA SEIMITSU ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Linear vibration motor
  • Linear vibration motor
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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0028] Example 1

[0029] like Figure 1-2 As shown, a linear vibration motor includes a housing 4, a vibration assembly and a stator assembly provided with an accommodating space, the housing 4 can be made of micro-permeable magnetic material or SUS430 stainless steel, wherein the vibration assembly and the peripheral surface of the stator assembly are facing The two ends of the vibration assembly are respectively elastically connected with the inner wall of the housing 4, and the stator assembly is fixedly connected with the inner wall of the accommodating space; a magnetic conductive sheet is also provided between the stator assembly and the inner wall of the housing 4. 7. The magnetic conductive sheet 7 can be made of ferrite material, such as SUS430 stainless steel, the thickness of the magnetic conductive sheet 7 can be 0.05mm-0.15mm, the magnetic conductive sheet 7 can be installed by welding or glue bonding . The vibration assembly includes a mass block 1, a magnet 3...

Example Embodiment

[0030] Example 2

[0031] As described in Embodiment 1, a linear vibration motor may have a plurality of magnetic conductive sheets, and the plurality of magnetic conductive sheets may be superimposed and arranged by welding. Preferably, two magnetic conductive sheets 7 may be stacked on the side of the flexible circuit board 6 facing away from the vibration component, and the two magnetic conductive sheets 7 may be stacked together by welding. The thickness of each magnetic conductive sheet 7 may be 0.03mm-0.1mm. Compared with Embodiment 1, this Embodiment 2 increases the number of magnetic conductive sheets, so that the guiding effect on the magnetic field lines can be enhanced, and the magnetic field lines can be more concentrated, thereby increasing the driving force when starting and the damping when stopping. force. The magnetic conductive sheet 7 may also have one or more notches so as to avoid the incoming and outgoing wire ends of the coil 2 .

Example Embodiment

[0032] Example 3

[0033] For a linear vibration motor described in Embodiments 1 and 2, the bottom wall of the housing 4 adjacent to the stator (ie, the cover plate 10 ) is made of magnetically conductive material, such as a micro-magnetically conductive material, so that the cover plate 10 can also play the role of a magnetic conductive sheet. Compared with Embodiments 1 and 2, since the cover plate 10 of Embodiment 3 also acts as a magnetic guide sheet, the guiding function of the magnetic field lines is further enhanced, and the magnetic field lines are more concentrated, thereby increasing the number of magnetic field lines. Driving force at start and damping force at stop.

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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 ...

Claims

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Application Information

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IPC IPC(8): H02K33/02H02K5/20
CPCH02K5/20H02K33/00H02K33/02
Inventor 不公告发明人
Owner SICHUAN AWA SEIMITSU ELECTRIC CO LTD
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