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Linear vibration motor

A technology of linear vibration and vibration direction, applied in electromechanical devices, electrical components, etc., can solve the problems of low BL value of magnetic circuit and small magnetic field, and achieve the effect of reducing magnetic flux leakage, improving magnetic field strength, and improving magnetic circuit efficiency

Inactive Publication Date: 2016-12-07
AAC TECH PTE LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the magnetic field in the magnetic gap of this magnetic circuit system is small, and the BL value of the magnetic circuit is low

Method used

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  • Linear vibration motor
  • Linear vibration motor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Please refer to figure 1 , figure 2 , image 3 and Figure 4 ,among them, figure 1 An exploded view of the three-dimensional structure of the linear vibration motor provided by the present invention, figure 2 for figure 1 The structure diagram of the linear vibration motor after assembly is shown, image 3 for figure 2 A cross-sectional view of the linear vibration motor shown along the A-A direction, Figure 4 for figure 2 A cross-sectional view of the linear vibration motor shown in the direction of B-B. The present invention provides a linear vibration motor 100, which includes a housing 1, a magnetic circuit system 3 and a vibrating system 5 fixed in the housing 1, and the magnetic circuit system 3 drives the vibrating system 5 Vibrate in the ZZ direction.

[0028] The housing 1 is a housing made of a soft magnetic material, which includes a housing 11 and a cover 13 that is assembled with the housing 11 to form a receiving space.

[0029] The housing 11 includes a m...

Embodiment 2

[0042] See Figure 5 , Is a cross-sectional view of the second embodiment of the linear vibration motor provided by the present invention. The difference between the second embodiment and the first embodiment is that the secondary magnetic circuit system 33' of the linear vibration motor 200 further includes a fourth magnet 333' attached to the third magnet 331' along the Z-Z direction. The fourth magnet 333' is magnetized along the ZZ direction, and the polarity of the fourth magnet 333' close to the third magnet 331' is the same as the first magnet 311' close to the pole. The polarities of the magnetic poles of the core 313' are opposite. Specifically, when the relative arrangement of the same poles of the first magnet 311' and the second magnet 315' is NSSN, the N pole of the fourth magnet 333' is attached to the The third magnet 331'; when the same poles of the first magnet 311' and the second magnet 315' are arranged in SNNS, the S pole of the fourth magnet 333' is attach...

Embodiment 3

[0047] See Image 6 , Is a cross-sectional view of Embodiment 3 of the linear vibration motor provided by the present invention. The difference between the third embodiment and the second embodiment is that the secondary magnetic circuit system 33" of the linear vibration motor 300 also includes a side attached to the third magnet 331" away from the fourth magnet 333" The fifth magnet 335″. The fifth magnet 335" is magnetized along the Z-Z direction, and the fifth magnet 335" and the fourth magnet 333" are arranged opposite to each other in the same pole.

[0048] In this embodiment, the fifth magnet 335" is the same magnet as the fourth magnet 333", and the fourth magnet 333" is far away from the fifth magnet 335". The surface is attached to the bottom of the housing 11", and the surface of the fifth magnet 335" away from the fourth magnet 333" is attached to the cover 13".

[0049] Compared with the second embodiment, in the third embodiment, the two third magnetic steels 331"...

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Abstract

The invention provides a linear vibration motor, which comprises a magnetic circuit system and an oscillator system, wherein the magnetic circuit system comprises a main magnetic circuit system and two secondary magnetic circuit systems; the main magnetic circuit system comprises first magnetic steel, a pole shank and second magnetic steel which are sequentially stacked along the vibration direction of the oscillator system; the first magnetic steel and the second magnetic steel are arranged in a homopolar opposite manner; each secondary magnetic circuit system comprises third magnetic steel; two opposite sides of the pole shank are homopolar opposite; and the polarities of homopolar opposite magnetic poles of the third magnetic steel are opposite to that of the homopolar opposite magnetic pole of the main magnetic circuit system. Compared with a related technology, the linear vibration motor provided by the invention has the advantages that the first magnetic steel and the second magnetic steel are arranged in a homopolar opposite manner and the secondary magnetic circuit systems are arranged at two opposite sides of the main magnetic circuit system, so that the magnetic field intensity of the magnetic circuit system is increased.

Description

【Technical Field】 [0001] The invention relates to a vibration motor, in particular to a linear vibration motor with optimized magnetic circuit. 【Background technique】 [0002] With the development of electronic technology, portable consumer electronic products are becoming more and more popular, such as mobile phones, handheld game consoles, navigation devices or handheld multimedia entertainment devices. These electronic products generally use vibration motors for system feedback. For example, mobile phone call reminders, information reminders, navigation reminders, and vibration feedback from game consoles. Such a wide range of applications requires high performance of the vibration motor. [0003] A related art linear vibration motor includes a housing with a housing space, a magnetic circuit system fixed in the housing space, and a vibrating system driven by the magnetic circuit system. The housing includes a housing and is assembled with the housing. A cover for the accommod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K33/02
CPCH02K33/02
Inventor 郭顺毛路斌陈召宪
Owner AAC TECH PTE LTD
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