WO2021082127A1 - 线性振动电机 - Google Patents

线性振动电机 Download PDF

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Publication number
WO2021082127A1
WO2021082127A1 PCT/CN2019/120472 CN2019120472W WO2021082127A1 WO 2021082127 A1 WO2021082127 A1 WO 2021082127A1 CN 2019120472 W CN2019120472 W CN 2019120472W WO 2021082127 A1 WO2021082127 A1 WO 2021082127A1
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WO
WIPO (PCT)
Prior art keywords
unit
vibration
fixed
magnetic steel
vibration motor
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Application number
PCT/CN2019/120472
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English (en)
French (fr)
Inventor
凌芳华
浦晓峰
王俊生
陶锋
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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Publication of WO2021082127A1 publication Critical patent/WO2021082127A1/zh

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/34—Reciprocating, oscillating or vibrating parts of the magnetic circuit
    • 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
    • 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
    • H02K33/12—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moving in alternate directions by alternate energisation of two coil systems
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/02—Additional mass for increasing inertia, e.g. flywheels
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/104—Structural association with clutches, brakes, gears, pulleys or mechanical starters with eddy-current brakes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids

Definitions

  • the utility model relates to a motor, in particular to a linear vibration motor used in the field of mobile electronic products.
  • the related art linear vibration motor includes a base having a housing space, a vibration unit, an elastic component fixed to the base and suspending the vibration unit in the housing space, and a base fixed to the base to drive the
  • the coil unit vibrated by the vibrating unit interacts with the magnetic field generated by the vibrating unit through the electric field generated by the coil unit, thereby driving the vibrating unit to make a reciprocating linear motion to generate vibration.
  • the vibration unit is damped by the vibration unit during the vibration process, the stability of the vibration unit is affected.
  • the vibration unit is adjusted by adding magnetic fluid or damping foam. Damping, but due to the poor temperature characteristics of magnetic fluid or foam, the reliability of adjusting the damping of the vibration unit is not high.
  • the technical problem to be solved by the utility model is to provide a linear vibration motor with good vibration performance and reliability.
  • the present invention provides a linear vibration motor, which includes a base with an accommodation space, a vibration unit, and an elastic component fixed to the base and suspended in the accommodation space.
  • a coil unit fixed to the base to drive the vibration unit to vibrate and a good conductor fixed to the base;
  • the vibration unit includes a magnetic steel unit that interacts with the coil unit to provide a driving force, so
  • the linear vibration motor further includes a good conductor fixed to the base and spaced apart from the vibration unit, and the good conductor is located in the magnetic field of the magnetic steel unit to generate a damping force that hinders the movement of the vibration unit.
  • the magnetic steel unit includes a main magnetic steel and a soft magnetic block attached to the magnetic pole of the main magnetic steel.
  • the good conductors are respectively arranged on opposite sides of the vibration unit along a vibration direction perpendicular to the vibration unit.
  • the magnetic steel unit further includes a secondary magnetic steel, and the secondary magnetic steel is attached to a side of the soft magnetic block away from the main magnetic steel along the vibration direction.
  • the soft magnetic blocks include two and are respectively located on opposite sides of the main magnet, and the auxiliary magnet includes two and are respectively located on the two soft magnetic blocks away from the main magnet. On the side.
  • the magnetization directions of the main magnet and the auxiliary magnet are both parallel to the vibration direction, and the magnetization directions of the main magnet and the auxiliary magnet are opposite.
  • the elastic components include two groups, and are respectively fixed on opposite sides of the vibration unit along the vibration direction.
  • the vibration unit further includes a mass block, the magnetic steel unit is embedded and fixed in the mass block, and the elastic component is fixed to the mass block.
  • each of the elastic components sequentially includes a first fixed arm, a first elastic arm extending from the first fixed arm, a second elastic arm extending in the opposite direction from the first elastic arm, and a second elastic arm extending from the first elastic arm.
  • a second fixed arm extending from two elastic arms; the first fixed arm is fixed to the vibration unit, and the second fixed arm is fixed to the base.
  • the good conductor is a copper sheet.
  • the linear vibration motor of the present invention is provided with good conductors in the base, and the good conductors are respectively arranged on opposite sides of the vibration unit along the vibration direction perpendicular to the vibration unit, and It is arranged spaced apart from the vibration unit.
  • the good conductor is stationary because it is fixed on the base.
  • the magnetic field emitted by the soft magnetic block moves with the movement of the vibrating unit, which makes the magnetic field intensity of a certain point of the good conductor continuously change, which is equivalent to A good conductor cuts the magnetic field emitted by the soft magnetic block, thereby generating an induced electromotive force, and the induced electromotive force hinders the movement of the good conductor, that is, the phenomenon of electromagnetic damping, thereby generating an interaction force that hinders the movement of the vibrating unit, and achieves the effect of adjusting the vibration characteristics of the vibrating unit.
  • the faster the unit moves the greater the induced electromotive force and the better the damping characteristics, which makes the linear vibration motor's vibration performance better.
  • the electromagnetic damping formed by the above structure is less affected by temperature, which makes the stability of adjusting the vibration characteristics higher.
  • Figure 1 is a schematic diagram of the three-dimensional structure of the linear vibration motor of the utility model
  • Figure 2 is an exploded schematic diagram of part of the three-dimensional structure of the linear vibration motor of the utility model
  • Figure 3 is a front view of a part of the three-dimensional structure of the linear vibration motor of the utility model
  • Figure 4 is a schematic diagram of the relationship between the magnetic pole setting of the magnetic steel unit and the good conductor in the linear vibration motor of the utility model.
  • the present invention provides a linear vibration motor 100, which includes a base 1, a vibration unit 2, an elastic component 3, a good conductor 4, a reinforcement block 5, and a limit block 6.
  • the base 1 has a receiving space 10, which includes a bottom cover 11 and an upper cover 12 covering the bottom cover and forming the receiving space 10 together.
  • the vibration unit 2 includes a magnetic steel unit 21 and a mass 22.
  • the coil unit of the magnetic steel unit 21 interacts to provide a driving force, and includes a main magnetic steel 211, a soft magnetic block 212 and a secondary magnetic steel 213.
  • the soft magnetic block 212 is attached to the magnetic pole of the main magnet 21. Specifically, the soft magnetic block 212 is attached to one side of the main magnet 21 along the vibration direction. More preferably, in this embodiment, there are two soft magnetic blocks 212, and the two soft magnetic blocks 212 are respectively attached to opposite sides of the main magnetic steel 21 along the vibration direction, and the stability of the symmetrical structure is better.
  • the magnet unit 21 is also provided with a secondary magnet 213.
  • the auxiliary magnet 213 is attached to the side of the soft magnetic block 212 away from the main magnet 211 along the vibration direction.
  • the mass 22 is used as a counterweight to increase the weight of the vibration unit 2 to achieve the purpose of increasing the vibration amplitude of the vibration unit 2 and improving the vibration performance.
  • the magnetic steel unit 21 is embedded and fixed in the mass 22.
  • the elastic component 3 suspends the vibration unit 2 in the receiving space 10.
  • One end of the elastic component 3 is fixed to the vibration unit 2, in this embodiment, it is specifically fixed to the mass 22; the other end of the elastic component 3 is fixed to the base 1, such as the bottom cover 11, for The vibration of the vibration unit 2 in the horizontal vibration direction provides restoring force.
  • the elastic component 3 includes two groups, which are respectively located on opposite sides of the vibration unit 22 along the vibration direction thereof.
  • the elastic component 3 has a V-shaped elastic sheet structure.
  • the elastic component 3 includes a first fixed arm 31, a first elastic arm 32 extending from the first fixed arm 31, and a first elastic arm 32 extending from the first fixed arm 31.
  • the second elastic arm 33 extending in the opposite direction from the elastic arm 32 and the second fixed arm 34 extending from the second elastic arm 33.
  • the first fixed arm 31 is fixed to the vibration unit 2, and the second fixed arm 34 is fixed to the base 1, specifically to the bottom cover 11 of the base 1.
  • the first elastic arm 32 and the second elastic arm 33 of one of the two elastic components 3 are surrounded by The formed opening is opposite to the opening surrounded by the first elastic arm 32 and the second elastic arm 33 of the other.
  • the good conductor 4 is fixed to the base 1 and is spaced apart from the vibration unit 2, and the good conductor 4 is located in the magnetic field of the magnetic steel unit 21 to generate a damping force that hinders the movement of the vibration unit 2. In this embodiment, it is specifically fixed to the bottom cover 11.
  • the good conductors 4 are respectively arranged on opposite sides of the vibration unit 2 along the vibration direction perpendicular to the vibration unit 2 and are spaced apart from the vibration unit 2.
  • the good conductor 4 is preferably a copper sheet, which has excellent electrical conductivity.
  • the magnetization direction of the main magnet 211 is parallel to the vibration direction of the vibration unit 2
  • the magnetization direction of the auxiliary magnet 213 is parallel to the vibration direction.
  • the main magnet 211 and the auxiliary magnet 213 of the magnet unit 21 are magnetized along the vibration direction, and the magnetization directions of the main magnet 211 and the auxiliary magnet 213 are opposite.
  • the good conductor 4 When the vibrating unit 2 vibrates in the direction of vibration, the good conductor 4 is fixed to the base 1 and is stationary, and the magnetic field emitted by the soft magnetic block 212 moves with the movement of the vibrating unit 2, making the magnetic field intensity of a certain point of the good conductor 4 constantly change , which is equivalent to the good conductor 4 cutting the magnetic field emitted by the soft magnetic block 212, thereby generating induced electromotive force, and the induced electromotive force hinders the movement of the good conductor 4, that is, electromagnetic damping phenomenon, thereby generating the interaction force hindering the movement of the vibrating unit 2 to achieve adjustment
  • the vibration characteristic of the vibration unit 2 acts.
  • the electromagnetic damping formed by the good conductor 4 in the above structure is less affected by temperature, the stability of adjusting the vibration characteristics is higher.
  • the reinforcing block 5 includes four.
  • the reinforcing block 5 is fixed on the side of the first fixed arm 31 away from the vibration unit 2 and The side of the second fixed arm 34 close to the vibration unit 2.
  • the arrangement of this structure strengthens the fixing strength of the first fixed arm 31 and the vibration unit 2 and strengthens the fixing strength of the second fixed arm 34 and the base 1 to prevent the elastic component 3 Falling off from the vibration unit 2 and/or the base 1 improves the reliability of the linear vibration motor 100.
  • the limiting block 6 includes two and is respectively fixed to the side of the second fixing arm 34 of the two elastic components 3 away from the vibration unit 2.
  • the setting of the limit block 6 increases the distance between the second elastic arm 33 and the base 1, and prevents the second elastic arm 33 from being caused by excessive amplitude during the vibration of the vibration unit 2
  • the collision with the base 1 improves the vibration performance and reliability of the linear vibration motor.
  • the linear vibration motor of the present invention is provided with good conductors in the base, and the good conductors are respectively arranged on opposite sides of the vibration unit along the vibration direction perpendicular to the vibration unit, and It is arranged spaced apart from the vibration unit.
  • the good conductor is stationary because it is fixed on the base.
  • the magnetic field emitted by the soft magnetic block moves with the movement of the vibrating unit, which makes the magnetic field intensity of a certain point of the good conductor continuously change, which is equivalent to A good conductor cuts the magnetic field emitted by the soft magnetic block, thereby generating an induced electromotive force, and the induced electromotive force hinders the movement of the good conductor, that is, the phenomenon of electromagnetic damping, thereby generating an interaction force that hinders the movement of the vibrating unit, and achieves the effect of adjusting the vibration characteristics of the vibrating unit.
  • the faster the unit moves the greater the induced electromotive force and the better the damping characteristics, which makes the linear vibration motor's vibration performance better.
  • the electromagnetic damping formed by the above structure is less affected by temperature, which makes the stability of adjusting the vibration characteristics higher.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Abstract

一种线性振动电机，包括具有收容空间（10）的基座（1）、振动单元（2）、固定于所述基座（1）并将所述振动单元（2）悬置于所述收容空间（10）的弹性组件（3）、固定于所述基座（1）以驱动所述振动单元（2）振动的线圈单元以及固定于所述基座（1）的良导体（4）；所述振动单元（2）包括与所述线圈单元相互作用以提供驱动力的磁钢单元（21），所述良导体（4）固定于所述基座（1）并与所述振动单元（2）间隔设置，所述良导体（4）位于所述磁钢单元（21）的磁场内以产生阻碍所述振动单元（2）运动的阻尼力。与相关技术相比，该线性振动电机振动性能好且可靠性高。

Description

线性振动电机 技术领域
本实用新型涉及一种电机，尤其涉及一种运用在移动电子产品领域的线性振动电机。
 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线性振动电机来做***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优，使用寿命长。
相关技术的线性振动电机包括具有收容空间的基座、振动单元、固定于所述基座并将所述振动单元悬置于所述收容空间的弹性组件，以及固定于所述基座以驱动所述振动单元振动的线圈单元，通过线圈单元产生的电场与振动单元产生的磁场相互作用，从而驱动所述振动单元做往复直线运动而产生振动。
 技术问题
然而，相关技术的线性振动电机中，因振动单元在振动过程中存承振动单元阻尼，从而使得振动单元的稳定性受影响，相关技术中通过使用添加磁液或者阻尼泡棉的方式调节振动单元阻尼，但由于磁液或泡棉的温度特性差，使得其调节振动单元阻尼的可靠性不高。
因此，有必要提供一种新的线性振动电机解决上述问题。
 技术解决方案
本实用新型需要解决的技术问题是提供一种振动性能好且可靠性的线性振动电机。
为解决上述技术问题，本实用新型提供了一种线性振动电机，包括具有收容空间的基座、振动单元、固定于所述基座并将所述振动单元悬置于所述收容空间的弹性组件、固定于所述基座以驱动所述振动单元振动的线圈单元以及固定于所述基座的良导体；所述振动单元包括与所述线圈单元相互作用以提供驱动力的磁钢单元，所述线性振动电机还包括固定于所述基座且与所述振动单元间隔设置的良导体，所述良导***于所述磁钢单元的磁场内以产生阻碍所述振动单元运动的阻尼力。
优选的，所述磁钢单元包括主磁钢和贴设于所述主磁钢的磁极处的软磁块。
优选的，所述良导体沿垂直于所述振动单元的振动方向分别设置于所述振动单元的相对两侧。
优选的，所述磁钢单元还包括副磁钢，所述副磁钢沿所述振动方向贴设于所述软磁块远离所述主磁钢的一侧。
优选的，所述软磁块包括两个且分别位于所述主磁钢的相对两侧，所述副磁钢包括两个且分别位于所述两个所述软磁块远离所述主磁钢的一侧。
优选的，所述主磁钢与所述副磁钢的充磁方向均平行于振动方向，且所述主磁钢与所述副磁钢的充磁方向相反。
优选的，所述弹性组件包括两组，且沿所述振动方向分别固定于所述振动单元的相对两侧。
优选的，所述振动单元还包括质量块，所述磁钢单元嵌设固定于所述质量块内，所述弹性组件固定于所述质量块。
优选的，每一所述弹性组件依次包括第一固定臂、由所述第一固定臂延伸的第一弹臂、由所述第一弹臂反向延伸的第二弹臂及由所述第二弹臂延伸的第二固定臂；所述第一固定臂固定于所述振动单元，所述第二固定臂固定于所述基座。
优选的，所述良导体为铜片。
 有益效果
与相关技术相比，本实用新型的线性振动电机在基座内设置良导体，并使所述良导体沿垂直于所述振动单元的振动方向分别设置于所述振动单元的相对两侧，且与所述振动单元间隔设置。良导体因固定于基座为静止不动，振动单元在沿振动方向往复运动时，软磁块散发出的磁场随振动单元运动而运动，使得良导体某个点的磁场强度不断变化，相当于良导体切割软磁块发出的磁场，从而产生感应电动势，而该感应电动势阻碍良导体运动，即电磁阻尼现象，从而产生阻碍振动单元运动的相互作用力，达到起调节振动单元振动特性作用，振动单元运动速度越快，产生感应电动势越大，阻尼特性越好，使得线性振动电机的振动性能更好。同时，因上述结构形成的电磁阻尼受温度影响小，使得调节振动特性的稳定性更高。
 附图说明
图1为本实用新型线性振动电机的立体结构示意图；
图2为本实用新型线性振动电机的部分立体结构分解示意图；
图3为本实用新型线性振动电机的部份立体结构正视图；
图4为本实用新型线性振动电机中磁钢单元磁极设置与良导体的关系示意图。
 本发明的实施方式
下面将结合附图和实施方式对本实用新型作进一步说明。
请同时参阅图1-3所示，本实用新型提供了一种线性振动电机100，包括基座1、振动单元2、弹性组件3、良导体4、加强块5以及限位块6。
所述基座1具有收容空间10，其包括底盖11和盖设于所述底盖并共同形成所述收容空间10的上盖12。
所述振动单元2包括磁钢单元21和质量块22。
所述磁钢单元21所述线圈单元相互作用以提供驱动力，其包括主磁钢211、软磁块212和副磁钢213。
所述软磁块212贴设于主磁钢21的磁极处。具体的，软磁块212沿所述振动方向贴设于所述主磁钢21的其中一侧。更优的，本实施方式中，软磁块212包括两个，两个软磁块212沿振动方向分别贴设于主磁钢21的相对两侧，对称设置结构的稳定性更好。
为了进一步提磁场，使振动单元2振动性能更好，磁钢单元21还设有副磁钢213。副磁钢213沿所述振动方向贴设于所述软磁块212远离所述主磁钢211的一侧。本实施方式中，副磁钢213包括两个，且分别位于所述两个软磁块212远离所述主磁钢211的一侧，形成对称结构，提高稳定性。
质量块22用于配重，增加振动单元2的重量，以实现提高振动单元2的振动幅度，改善振动性能的目的。本实施方式中，磁钢单元21嵌设固定于质量块22内。
所述弹性组件3将所述振动单元2悬置于所述收容空间10内。
弹性组件3一端固定于所述振动单元2，本实施方式中具体为固定在质量块22上；弹性组件3另一端固定于所述基座1，比如固定于底盖11，用于为所述振动单元2在水平振动方向的振动提供回复力。
本实施方式中，所述弹性组件3包括两组，且分别位于所述振动单元22的沿其振动方向的相对两侧。
具体的，所述弹性组件3为呈V型的弹片结构，所述弹性组件3依次包括第一固定臂31、由所述第一固定臂31延伸的第一弹臂32、由所述第一弹臂32反向延伸的第二弹臂33及由所述第二弹臂33延伸的第二固定臂34。
所述第一固定臂31固定于所述振动单元2，所述第二固定臂34固定于所述基座1，具体固定于基座1的底盖11。
本实施方式中，为了增加所述弹性组件3的提供的回复力的稳定与对称，两个所述弹性组件3中的其中一个的所述第一弹臂32和所述第二弹臂33围成的开口与另一个的所述第一弹臂32和所述第二弹臂33围成的开口朝向相反设置。
良导体4固定于所述基座1且与所述振动单元2间隔设置，良导体4位于磁钢单元21的磁场内以产生阻碍所述振动单元2运动的阻尼力。本实施方式中具体固定于底盖11。所述良导体4沿垂直于所述振动单元2的振动方向分别设置于所述振动单元2的相对两侧，且与所述振动单元2间隔设置。
更优的，良导体4优选铜片，其导电性能优。
本实施方式中，如图4所示，所述主磁钢211的充磁方向平行于所述振动单元2的振动方向，所述副磁钢213的充磁方向平行于所述振动方向。磁钢单元21的主磁钢211和副磁钢213均沿振动方向充磁，且所述主磁钢211与所述副磁钢213的充磁方向相反，上述结构的磁钢单元21设置后，从该磁钢单元21发出的磁力线沿垂直于振动方向垂直穿过良导体4。
振动单元2沿振动方向振动时，良导体4固定于基座1静止不动，而软磁块212散发出的磁场随振动单元2运动而运动，使得良导体4某个点的磁场强度不断变化，相当于良导体4切割软磁块212发出的磁场，从而产生感应电动势，而该感应电动势阻碍良导体4运动，即电磁阻尼现象，从而产生阻碍振动单元2运动的相互作用力，达到起调节振动单元2振动特性作用，振动单元2运动速度越快，良导体4产生感应电动势越大，阻尼特性越好，使得线性振动电机100的振动性能更好。同时，因上述结构中良导体4形成的电磁阻尼受温度影响小，使得调节振动特性的稳定性更高。
本实施方式中，所述加强块5包括四个，对于每一所述弹性组件3，所述加强块5分别固定于其所述第一固定臂31的远离所述振动单元2的一侧和所述第二固定臂34的靠近所述振动单元2的一侧。该结构的设置加强了所述第一固定臂31和与所述振动单元2和固定强度，以及加强了所述第二固定臂34与所述基座1的固定强度，防止所述弹性组件3从所述振动单元2和/或所述基座1脱落，提高了所述线性振动电机100的可靠性。
所述限位块6包括两个且分别固定于两个所述弹性组件3的所述第二固定臂34的远离所述振动单元2的一侧。所述限位块6的设置增加了所述第二弹臂33与所述基座1的间隔，避免了所述第二弹臂33在随所述振动单元2振动过程中因振幅过大而与所述基座1产生碰撞，提高了所述线性振动电机的振动性能和可靠性。
与相关技术相比，本实用新型的线性振动电机在基座内设置良导体，并使所述良导体沿垂直于所述振动单元的振动方向分别设置于所述振动单元的相对两侧，且与所述振动单元间隔设置。良导体因固定于基座为静止不动，振动单元在沿振动方向往复运动时，软磁块散发出的磁场随振动单元运动而运动，使得良导体某个点的磁场强度不断变化，相当于良导体切割软磁块发出的磁场，从而产生感应电动势，而该感应电动势阻碍良导体运动，即电磁阻尼现象，从而产生阻碍振动单元运动的相互作用力，达到起调节振动单元振动特性作用，振动单元运动速度越快，产生感应电动势越大，阻尼特性越好，使得线性振动电机的振动性能更好。同时，因上述结构形成的电磁阻尼受温度影响小，使得调节振动特性的稳定性更高。
以上所述仅为本实用新型的实施例，并非因此限制本实用新型的专利范围，凡是利用本实用新型说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其它相关的技术领域，均同理包括在本实用新型的专利保护范围内。

Claims (10)

  1. 一种线性振动电机，包括具有收容空间的基座、振动单元、固定于所述基座并将所述振动单元悬置于所述收容空间的弹性组件，以及固定于所述基座以驱动所述振动单元振动的线圈单元，其特征在于，所述振动单元包括与所述线圈单元相互作用以提供驱动力的磁钢单元，所述线性振动电机还包括固定于所述基座且与所述振动单元间隔设置的良导体，所述良导***于所述磁钢单元的磁场内以产生阻碍所述振动单元运动的阻尼力。
  2. 根据权利要求1所述的线性振动电机，其特征在于，所述磁钢单元包括主磁钢和贴设于所述主磁钢的磁极处的软磁块。
  3. 根据权利要求1所述的线性振动电机，其特征在于，所述良导体沿垂直于所述振动单元的振动方向分别设置于所述振动单元的相对两侧。
  4. 根据权利要求2所述的线性振动电机，其特征在于，所述磁钢单元还包括副磁钢，所述副磁钢沿所述振动方向贴设于所述软磁块远离所述主磁钢的一侧。
  5. 根据权利要求4所述的线性振动电机，其特征在于，所述软磁块包括两个且分别位于所述主磁钢的相对两侧，所述副磁钢包括两个且分别位于所述两个所述软磁块远离所述主磁钢的一侧。
  6. 根据权利要求4所述的线性振动电机，其特征在于，所述主磁钢与所述副磁钢的充磁方向均平行于振动方向，且所述主磁钢与所述副磁钢的充磁方向相反。
  7. 根据权利要求1所述的线性振动电机，其特征在于，所述弹性组件包括两组，且沿所述振动方向分别固定于所述振动单元的相对两侧。
  8. 根据权利要求7所述的线性振动电机，其特征在于，所述振动单元还包括质量块，所述磁钢单元嵌设固定于所述质量块内，所述弹性组件固定于所述质量块。
  9. 根据权利要求7所述的线性振动电机，其特征在于，每一所述弹性组件依次包括第一固定臂、由所述第一固定臂延伸的第一弹臂、由所述第一弹臂反向延伸的第二弹臂及由所述第二弹臂延伸的第二固定臂；所述第一固定臂固定于所述振动单元，所述第二固定臂固定于所述基座。
  10. 根据权利要求1所述的线性振动电机，其特征在于，所述良导体为铜片。
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140152126A1 (en) * 2009-07-22 2014-06-05 Samsung Electro-Mechanics Co., Ltd. Horizontal linear vibrator
CN207530688U (zh) * 2017-04-14 2018-06-22 瑞声科技(新加坡)有限公司 振动电机
CN109149894A (zh) * 2018-09-10 2019-01-04 浙江省东阳市东磁诚基电子有限公司 一种带有阻尼***的新型水平振动马达
CN208589889U (zh) * 2018-08-03 2019-03-08 瑞声科技（南京）有限公司 线性振动电机
JP2019118230A (ja) * 2017-12-27 2019-07-18 日本電産セイミツ株式会社 振動モータ
CN110098715A (zh) * 2019-06-17 2019-08-06 重庆市灵龙电子有限公司 磁悬浮手机振动马达

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140152126A1 (en) * 2009-07-22 2014-06-05 Samsung Electro-Mechanics Co., Ltd. Horizontal linear vibrator
CN207530688U (zh) * 2017-04-14 2018-06-22 瑞声科技(新加坡)有限公司 振动电机
JP2019118230A (ja) * 2017-12-27 2019-07-18 日本電産セイミツ株式会社 振動モータ
CN208589889U (zh) * 2018-08-03 2019-03-08 瑞声科技（南京）有限公司 线性振动电机
CN109149894A (zh) * 2018-09-10 2019-01-04 浙江省东阳市东磁诚基电子有限公司 一种带有阻尼***的新型水平振动马达
CN110098715A (zh) * 2019-06-17 2019-08-06 重庆市灵龙电子有限公司 磁悬浮手机振动马达

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