WO2020140536A1 - 线性振动电机 - Google Patents

线性振动电机 Download PDF

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Publication number
WO2020140536A1
WO2020140536A1 PCT/CN2019/110645 CN2019110645W WO2020140536A1 WO 2020140536 A1 WO2020140536 A1 WO 2020140536A1 CN 2019110645 W CN2019110645 W CN 2019110645W WO 2020140536 A1 WO2020140536 A1 WO 2020140536A1
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WO
WIPO (PCT)
Prior art keywords
magnetic steel
vibrator
vibration motor
linear vibration
magnetic
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PCT/CN2019/110645
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English (en)
French (fr)
Inventor
凌芳华
陶锋
浦晓峰
Original Assignee
瑞声声学科技(深圳)有限公司
瑞声科技(新加坡)有限公司
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Application filed by 瑞声声学科技(深圳)有限公司, 瑞声科技(新加坡)有限公司 filed Critical 瑞声声学科技(深圳)有限公司
Publication of WO2020140536A1 publication Critical patent/WO2020140536A1/zh

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/18—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with coil systems moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/04—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism
    • B06B1/045—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism using vibrating magnet, armature or coil system
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/16—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with polarised armatures moving in alternate directions by reversal or energisation of a single coil system

Definitions

  • the utility model relates to the technical field of motors, in particular to a linear vibration motor.
  • vibration motors for system feedback. For example, phone call notification, information prompt, navigation prompt, game machine vibration feedback, etc.
  • Such a wide range of applications requires high performance and long service life of the vibration motor.
  • a vibration motor includes a housing and a vibrator provided in the housing and a stator cooperating with the vibrator.
  • the vibrator includes a counterweight and a magnetic steel embedded in the counterweight.
  • the stator includes a fixed The coil of the case, the vibration motor of this structure has a slow response speed, low acceleration, and a narrow frequency band.
  • the purpose of the utility model is to provide a linear vibration motor which solves the technical problems of slow response speed, low acceleration and narrow frequency band of the linear vibration motor in the related art.
  • the present invention provides a linear vibration motor, including a housing with a first housing space, and a vibrator and a stator housed in the housing, one of the vibrator and the stator includes a screw
  • the first magnetic steel and the second magnetic steel which are oppositely arranged at both ends of the solenoid;
  • the third magnetic steel and the fourth magnetic steel which are oppositely arranged on both sides of the solenoid;
  • a magnetically conductive support having a second receiving space includes a bottom wall disposed parallel to the vibrating direction of the vibrator, a side wall bent and extending from a periphery of the bottom wall, and a through hole penetrating the bottom wall, the bottom
  • the wall is rectangular
  • the bottom wall includes two oppositely arranged first side edges and two oppositely arranged second side edges connecting the two first side edges
  • the side wall includes two first side edges respectively Two oppositely arranged first side walls extending in the vertical vibrator vibration direction and two oppositely arranged second side walls respectively extending in the vertical vibrator vibration direction from the two side edges
  • the side wall further includes the through opening Two oppositely disposed third side walls extending in the vertical vibrator vibration direction on opposite sides of the edge
  • the third side wall is parallel to the second side wall
  • the first magnetic steel and the second magnetic steel are respectively fixed
  • the third magnetic steel and the fourth magnetic steel are fixed on the inner surfaces of the two side walls, respectively.
  • the first magnetic steel and the second magnetic steel are disposed opposite to the same pole.
  • the third magnetic steel and the fourth magnetic steel are arranged opposite to the same pole, and the magnetic poles of the third magnetic steel and the fourth magnetic steel opposite to the same pole are opposite to the first magnetic steel and the The second magnet is opposite to the pole opposite to the pole.
  • the stator is fixed to the housing, and the stator includes the solenoid, and the vibrator includes the magnetic circuit structure.
  • the solenoid includes an iron core and a coil wound around the surface of the iron core.
  • the linear vibration motor further includes two springs accommodated in the housing and arranged along the vibration direction of the vibrator, and the two springs are fixedly connected to the two second side walls, respectively.
  • the vibrator further includes two weights fixed to both ends of the magnetically conductive support along the vibration direction of the vibrator.
  • two of the weight blocks are respectively fixed on the outer surfaces of the two third side walls.
  • the spring includes two upright posts fixed to the housing at two opposite intervals, and an elastic part connecting the two upright posts, and the second side wall is fixed to the elastic part.
  • the magnetically conductive support By setting the magnetically conductive support, it can be used not only to conduct and fix the magnetic steel, but also to fix the counterweight, to simplify the assembly structure and improve reliability;
  • Figure 1 is a perspective exploded view of the linear vibration motor of the present invention
  • FIG. 2 is a front view of the partial structure of the linear vibration motor of the present invention.
  • FIG. 3 is a cross-sectional view along the long side direction of the linear vibration motor of the present invention.
  • Fig. 5 is a perspective structural view of the magnetically conductive support in the linear vibration motor of the present invention.
  • the present invention provides a linear vibration motor 100, which includes a housing 1 having a first receiving space, a vibrator 2 and a stator 3 contained in the housing 1, and elastic supports The spring 4 of the vibrator 2.
  • One of the vibrator 2 and the stator 3 includes a solenoid 31, and the other of the vibrator 2 and the stator 3 includes a magnetic circuit structure 21.
  • the stator 3 includes the solenoid 31, and the vibrator 2 includes the magnetic circuit structure 21.
  • the magnetic circuit structure 21 includes a first magnetic steel 211, a second magnetic steel 212, a third magnetic steel 213, a fourth magnetic steel 214, and a magnetic conductive support 215.
  • the first magnetic steel 211, the second magnetic steel 212, the third magnetic steel 213, and the fourth magnetic steel 214 are respectively fixed to the magnetic conductive support 215.
  • the first magnetic steel 211 and the second magnetic steel 212 are arranged at two ends of the solenoid 31 respectively, and the first magnetic steel 211 and the second magnetic steel 212 are oppositely arranged with the same pole.
  • the third magnetic steel 213 and the fourth magnetic steel 214 are disposed on both sides of the solenoid 31, the third magnetic steel 213 and the fourth magnetic steel 214 are arranged opposite to each other, and the first The magnetic poles of the three magnetic steel 213 and the fourth magnetic steel 214 opposite to the same pole are opposite to the magnetic poles of the first magnetic steel 211 and the second magnetic steel 212 opposite to the same pole.
  • the S pole of the first magnet 211 and the second magnet 212 are opposite, and the N pole of the third magnet 213 and the fourth magnet 214 are opposite.
  • the magnetically conductive support 215 has a second receiving space.
  • the magnetically conductive support 215 includes a bottom wall 216 disposed parallel to the vibration direction of the vibrator, and a side extending from the periphery of the bottom wall 216.
  • the first magnetic steel 211, the second magnetic steel 212, the third magnetic steel 213, the fourth magnetic steel 214 and the solenoid 31 are all accommodated in the second accommodating space, and The first magnetic steel 211, the second magnetic steel 212, the third magnetic steel 213, and the fourth magnetic steel 214 are disposed around the solenoid 31, and pass through the side of the solenoid 31 Setting four magnets can significantly enhance the magnetic field strength.
  • the solenoid 31 includes an iron core 311 and a coil 312 wound around the surface of the iron core 311.
  • the solenoid 31 is fixed to the housing 1 through the iron core 311 to form the stator 3.
  • the linear vibration motor 100 further includes two springs 4 housed in the housing 1 and arranged along the vibration direction of the vibrator 2.
  • the springs 4 have an “H” shape and include springs fixed to the housing 1.
  • Two upright posts 41 arranged opposite to each other and an elastic portion 42 connecting the two upright posts 41 are fixedly connected to the second side wall 2172.
  • the vibrator 2 further includes two weights 22 fixed to both ends of the magnetically conductive support 215 along the vibration direction of the vibrator 2, and the two weights 22 are fixed on the two third sides respectively
  • the outer surface of the wall 2173 is only between the counterweight 22 and the first magnetic steel 211 and between the counterweight 22 and the second magnetic steel 212
  • the third side wall 2173 can stabilize the weight 22 by magnetic attraction.
  • the magnetically conductive support By setting the magnetically conductive support, it can be used not only to conduct and fix the magnetic steel, but also to fix the counterweight, to simplify the assembly structure and improve reliability;

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

一种线性振动电机（100），包括具有收容空间的壳体（1）以及收容于所述壳体（1）内的振子（2）和定子（3），所述振子（2）和所述定子（3）的其中一方包括螺线管（31），所述振子（2）和所述定子（3）的另一方包括磁路结构（21），所述磁路结构（21）包括导磁支架（215）和四块磁钢（211，212，213，214），四块磁钢（211，212，213，214）围绕导磁支架（215）设置。通过在螺线管（31）周侧设置四块磁钢（211，212，213，214），可以显著增强磁场强度；通过设置导磁支架（215），不但可以用来导磁和固设磁钢（211，212，213，214），还能用来固设配重块（22），实现简化装配结构，提高可靠性；响应速度快、加速度大、频带宽。

Description

线性振动电机 技术领域
本实用新型涉及电机技术领域，尤其涉及一种线性振动电机。
 背景技术
随着电子技术的发展，便携式消费性电子产品越来越受人们的追捧，如手机、掌上游戏机、导航装置或掌上多媒体娱乐设备等，这些电子产品一般都会用到振动电机来做系统反馈，比如手机的来电提示、信息提示、导航提示、游戏机的振动反馈等。如此广泛的应用，就要求振动电机的性能高，使用寿命长。
 技术问题
相关技术中，振动电机包括壳体和设置于壳体内的振子和与所述振子配合的定子，所述振子包括配重块和嵌设于配重块内的磁钢，所述定子包括固定于壳体的线圈，这种结构的振动电机响应速度慢、加速度小、频带窄。
因此，实有必须提供一种新的线性振动电机解决上述技术问题。
 技术解决方案
本实用新型的目的在于提供一种线性振动电机，其解决相关技术中的线性振动电机响应速度慢、加速度小、频带窄的技术问题。
为了解决上述技术问题，本实用新型提供了一种线性振动电机，包括具有第一收容空间的壳体以及收容于所述壳体内的振子和定子，所述振子和所述定子的其中一方包括螺线管，所述振子和所述定子的另一方包括磁路结构，所述磁路结构包括：
分设于所述螺线管两端相对设置的第一磁钢和第二磁钢；
分设于所述螺线管两侧相对设置的第三磁钢和第四磁钢；
具有第二收容空间的导磁支架，所述导磁支架包括平行振子振动方向设置的底壁、由所述底壁周缘弯折延伸的侧壁以及贯穿所述底壁的通口，所述底壁呈矩形，所述底壁包括两相对设置的第一侧边以及连接两所述第一侧边且相对设置的两第二侧边，所述侧壁包括分别自两所述第一侧边沿垂直振子振动方向延伸的两相对设置的第一侧壁以及分别自两所述第二侧边沿垂直振子振动方向延伸的两相对设置的第二侧壁，所述侧壁还包括由所述通口边缘相对两侧沿垂直振子振动方向延伸的两相对设置的第三侧壁，所述第三侧壁平行于所述第二侧壁，所述第一磁钢和所述第二磁钢分别固设于两所述第三侧壁的内侧表面，所述第三磁钢和所述第四磁钢分别固设于两所述第一侧壁的内侧表面。
优选的，所述第一磁钢和所述第二磁钢同极相对设置。
优选的，所述第三磁钢与所述第四磁钢同极相对设置，且所述第三磁钢和所述第四磁钢同极相对的磁极与所述第一磁钢和所述第二磁钢同极相对的磁极相反。
优选的，所述定子固定于所述壳体，且所述定子包括所述螺线管，所述振子包括所述磁路结构。
优选的，所述螺线管包括铁芯和缠绕所述铁芯表面的线圈。
优选的，所述线性振动电机还包括收容于所述壳体内并沿所述振子振动方向设置的两个弹簧，两个所述弹簧分别与两所述第二侧壁固定连接。
优选的，所述振子还包括固定于所述导磁支架沿所述振子振动方向的两端的两块配重块。
优选的，两块所述配重块分别固设于两所述第三侧壁的外侧表面。
优选的，所述弹簧包括固定于所述壳体的两相对间隔设置的两根立柱和连接两根所述立柱的弹性部，所述第二侧壁固定于所述弹性部。
 有益效果
本实用新型的有益效果在于:
1．通过在螺线管周侧设置四块磁钢，可以显著增强磁场强度；
2．通过设置导磁支架，不但可以用来导磁和固设磁钢，还能用来固设配重块，实现简化装配结构，提高可靠性；
3.响应速度快、加速度大、频带宽。
 附图说明
图1是本实用新型线性振动电机的立体分解图；
图2是本实用新型线性振动电机的部分结构主视图；
图3是沿本实用新型线性振动电机长边方向的剖视图；
图4是沿本实用新型线性振动电机短边方向的剖视图；
图5是本实用新型线性振动电机中导磁支架的立体结构图。
 本发明的实施方式
下面结合附图和实施方式对本实用新型作进一步详细描述。以下实施例用于说明本实用新型，但不用来限制本实用新型的范围。
请参阅图1和2所示，本实用新型提供了一种线性振动电机100，包括具有第一收容空间的壳体1，收容于所述壳体1内的振子2和定子3，以及弹性支撑所述振子2的弹簧4。所述振子2和所述定子3的其中一方包括螺线管31，所述振子2和所述定子3的另一方包括磁路结构21。在本发明的优选实施例中，所述定子3包括所述螺线管31，所述振子2包括所述磁路结构21。
所述磁路结构21包括第一磁钢211、第二磁钢212、第三磁钢213、第四磁钢214以及导磁支架215。所述第一磁钢211、所述第二磁钢212、所述第三磁钢213以及所述第四磁钢214分别固设于所述导磁支架215。
所述第一磁钢211和所述第二磁钢212分设于所述螺线管31两端，所述第一磁钢211和所述第二磁钢212同极相对设置。
所述第三磁钢213和所述第四磁钢214分设于所述螺线管31两侧，所述第三磁钢213与所述第四磁钢214同极相对设置，且所述第三磁钢213和所述第四磁钢214同极相对的磁极与所述第一磁钢211和所述第二磁钢212同极相对的磁极相反，在本实用新型的具体实施方式中，所述第一磁钢211和所述第二磁钢212的S极相对，所述第三磁钢213和所述第四磁钢214的N极相对。
再结合图3-5所示，所述导磁支架215具有第二收容空间，所述导磁支架215包括平行振子振动方向设置的底壁216、由所述底壁216周缘弯折延伸的侧壁217以及贯穿所述底壁216的通口218，所述底壁216呈矩形，所述底壁216包括两相对设置的第一侧边2161以及连接两所述第一侧边2161且相对设置的两第二侧边2162，所述侧壁217包括分别自两所述第一侧边2161沿垂直振子振动方向延伸的两相对设置的第一侧壁2171以及分别自两所述第二侧边2162沿垂直振子振动方向延伸的两相对设置的第二侧壁2172，所述侧壁217还包括由所述通口218边缘相对两侧沿垂直振子振动方向延伸的两相对设置的第三侧壁2173，所述第三侧壁2173平行于所述第二侧壁2172，所述第一磁钢211和所述第二磁钢212分别固设于两所述第三侧壁2173的内侧表面，所述第三磁钢213和所述第四磁钢214分别固设于两所述第一侧壁2171的内侧表面。
所述第一磁钢211、所述第二磁钢212、所述第三磁钢213、所述第四磁钢214以及所述螺线管31均收容于所述第二收容空间内，且所述第一磁钢211、所述第二磁钢212、所述第三磁钢213以及所述第四磁钢214围绕所述螺线管31设置，通过在所述螺线管31周侧设置四块磁钢，可以显著增强磁场强度。
所述螺线管31包括铁芯311和缠绕所述铁芯311表面的线圈312，所述螺线管31通过所述铁芯311固定于所述外壳1，从而形成所述定子3。
所述线性振动电机100还包括收容于所述壳体1内并沿所述振子2振动方向设置的两个弹簧4，所述弹簧4呈“H”形，包括固定于所述壳体1的两相对间隔设置的两根立柱41和连接两根所述立柱41的弹性部42，所述弹性部42与所述第二侧壁2172固定连接。
所述振子2还包括固定于所述导磁支架215沿所述振子2振动方向的两端的两块配重块22，两块所述配重块22分别固设于两个所述第三侧壁2173的外侧表面，由于所述配重块22与所述第一磁钢211之间和所述配重块22与所述第二磁钢212之间只隔着具有导磁功能的所述第三侧壁2173，通过磁吸引力可以稳固所述配重块22。
本实用新型的有益效果在于:
1．通过在螺线管周侧设置四块磁钢，可以显著增强磁场强度；
2．通过设置导磁支架，不但可以用来导磁和固设磁钢，还能用来固设配重块，实现简化装配结构，提高可靠性；
3.响应速度快、加速度大、频带宽。
以上所述的仅是本实用新型的较佳实施方式，在此应当指出，对于本领域的普通技术人员来说，在不脱离本实用新型创造构思的前提下，还可以做出改进，但这些均属于本实用新型的保护范围。

Claims (9)

  1. 一种线性振动电机，包括具有第一收容空间的壳体以及收容于所述壳体内的振子和定子，所述振子和所述定子的其中一方包括螺线管，所述振子和所述定子的另一方包括磁路结构，其特征在于，所述磁路结构包括：
    分设于所述螺线管两端相对设置的第一磁钢和第二磁钢；
    分设于所述螺线管两侧相对设置的第三磁钢和第四磁钢；
    具有第二收容空间的导磁支架，所述导磁支架包括平行振子振动方向设置的底壁、由所述底壁周缘弯折延伸的侧壁以及贯穿所述底壁的通口，所述底壁呈矩形，所述底壁包括两相对设置的第一侧边以及连接两所述第一侧边且相对设置的两第二侧边，所述侧壁包括分别自两所述第一侧边沿垂直振子振动方向延伸的两相对设置的第一侧壁以及分别自两所述第二侧边沿垂直振子振动方向延伸的两相对设置的第二侧壁，所述侧壁还包括由所述通口边缘相对两侧沿垂直振子振动方向延伸的两相对设置的第三侧壁，所述第三侧壁平行于所述第二侧壁，所述第一磁钢和所述第二磁钢分别固设于两所述第三侧壁的内侧表面，所述第三磁钢和所述第四磁钢分别固设于两所述第一侧壁的内侧表面。
  2. 根据权利要求1所述的线性振动电机，其特征在于，所述第一磁钢和所述第二磁钢同极相对设置。
  3. 根据权利要求2所述的线性振动电机，其特征在于，所述第三磁钢与所述第四磁钢同极相对设置，且所述第三磁钢和所述第四磁钢同极相对的磁极与所述第一磁钢和所述第二磁钢同极相对的磁极相反。
  4. 根据权利要求1所述的线性振动电机，其特征在于，所述定子固定于所述壳体，且所述定子包括所述螺线管，所述振子包括所述磁路结构。
  5. 根据权利要求4所述的线性振动电机，其特征在于，所述螺线管包括铁芯和缠绕所述铁芯表面的线圈。
  6. 根据权利要求4所述的线性振动电机，其特征在于，所述线性振动电机还包括收容于所述壳体内并沿所述振子振动方向设置的两个弹簧，两个所述弹簧分别与两所述第二侧壁固定连接。
  7. 根据权利要求6所述的线性振动电机，其特征在于，所述振子还包括固定于所述导磁支架沿所述振子振动方向的两端的两块配重块。
  8. 根据权利要求7所述的线性振动电机，其特征在于，两块所述配重块分别固设于两所述第三侧壁的外侧表面。
  9. 根据权利要求6或7所述的线性振动电机，其特征在于，所述弹簧包括固定于所述壳体的两相对间隔设置的两根立柱和连接两根所述立柱的弹性部，所述第二侧壁固定于所述弹性部。
PCT/CN2019/110645 2018-12-30 2019-10-11 线性振动电机 WO2020140536A1 (zh)

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CN110784584B (zh) * 2019-10-08 2021-06-18 Oppo广东移动通信有限公司 一种移动终端及其防摔控制方法
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