WO2021127908A1 - 线性振动电机 - Google Patents

线性振动电机 Download PDF

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Publication number
WO2021127908A1
WO2021127908A1 PCT/CN2019/127601 CN2019127601W WO2021127908A1 WO 2021127908 A1 WO2021127908 A1 WO 2021127908A1 CN 2019127601 W CN2019127601 W CN 2019127601W WO 2021127908 A1 WO2021127908 A1 WO 2021127908A1
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WIPO (PCT)
Prior art keywords
unit
vibration
magnetic steel
auxiliary
magnetic
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PCT/CN2019/127601
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English (en)
French (fr)
Inventor
凌芳华
浦晓峰
华子旭
王舒鸣
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
Priority to PCT/CN2019/127601 priority Critical patent/WO2021127908A1/zh
Publication of WO2021127908A1 publication Critical patent/WO2021127908A1/zh

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    • 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
    • H02K35/00—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit

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 or bearing fixed to the base and suspending the vibration unit in the housing space, and fixed to the base to
  • the coil unit that drives the vibration unit to vibrate interacts with the magnetic field generated by the vibration unit through the electric field generated by the coil unit, thereby driving the vibration unit to make a reciprocating linear motion to generate vibration.
  • the purpose of the utility model is to provide a linear vibration motor with better vibration sensing performance.
  • a linear vibration motor which includes:
  • a guide housing including a body and a guide channel penetrating the body;
  • a vibration unit the vibration unit is accommodated in the guide channel and forms a sliding connection, and the vibration unit includes a magnetic steel unit;
  • a coil unit the coil unit is sleeved on the outside of the guide housing to drive the vibrating unit to vibrate along the axial direction of the guide channel;
  • the auxiliary magnetic steel unit is fixed to the guide shell and is spaced apart from the vibration unit, and the auxiliary magnetic steel unit is located in the magnetic field of the magnetic steel unit to generate vibrations for restoring the vibration
  • the auxiliary magnetic steel unit includes two groups, which are respectively arranged on opposite sides of the voice coil unit along the vibration direction of the vibration unit;
  • a conductive damping unit the conductive damping unit is sleeved on the guide shell, and the conductive damping unit 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 conductive damping unit at least partially covers the coil unit.
  • the conductive damping unit includes an upper damping unit and a lower damping unit that are disposed oppositely, and the upper damping unit and the lower damping unit are respectively disposed on opposite sides of the coil unit along a direction perpendicular to the vibration direction. It is completely attached to the coil unit.
  • the two conductive damping units cover a part of the coil unit.
  • the magnetic steel unit includes a magnetic steel and a soft magnetic block attached to the magnetic pole of the magnetic steel.
  • the magnetic steel includes two, and the soft magnetic block is sandwiched and fixed between the two magnetic steels.
  • the vibration unit further includes a mass block, which is attached to a side of the magnetic steel away from the soft magnetic block along the vibration direction.
  • the magnetization directions of the two magnets are parallel to the vibration direction, and the magnetization directions are opposite; each group of the auxiliary magnet unit includes two auxiliary magnets, which are perpendicular to the vibration direction. Are respectively arranged on opposite sides of the vibration unit; the magnetizing direction of the two auxiliary magnets of the auxiliary magnet unit is perpendicular to the vibration direction, and the auxiliary magnet is close to one of the magnets
  • the magnetic pole on the side is opposite to the magnetic pole on the end of the magnetic steel away from the soft magnetic block.
  • the linear vibration motor further includes two housing plates fixed to the guide housing, the two housing plates are respectively located at opposite ends of the guide housing along the axial direction of the guide channel, and The housing plate at least partially covers the guide channel.
  • the outer surface of the guide housing is recessed to form two sets of first receiving grooves and a ring-shaped second receiving groove, and the two sets of first receiving grooves are arranged in the second receiving groove at intervals along the vibration direction.
  • the two sets of auxiliary magnetic steel units are respectively accommodated and fixed in the two sets of first accommodating grooves, and the coil unit and the conductive damping unit are accommodated and fixed in the second accommodating grooves.
  • the present invention adds a conductive damping unit on the basis of adding the auxiliary magnetic steel unit, and the conductive damping unit is sleeved on the guide shell.
  • the vibrating unit vibrates, the magnetic steel moves with the vibration of the vibrating unit, and the magnetic field formed by the magnetic steel also moves. Therefore, the magnetic field strength of different parts of the conductive damping unit also changes.
  • the conductive damping unit generates a local eddy current, thereby generating a back electromotive force that hinders the vibration of the vibration unit, that is, generates a damping force that hinders the movement of the vibration unit.
  • the damping force changes with the vibration of the vibration unit, so the present invention will provide better vibration performance and better reliability.
  • Figure 1 is a partial three-dimensional exploded structure diagram of the linear vibration motor of the utility model
  • Figure 2 is a schematic diagram of the three-dimensional structure of the linear vibration motor of the utility model
  • Figure 3 is a cross-sectional view along line A-A of Figure 2 of the utility model.
  • the present invention provides a linear vibration motor 100, which includes a guide housing 1, a vibration unit 2, a coil unit 3, an auxiliary magnetic steel unit 4, a housing plate 5, and a conductive damping unit 6.
  • the guide housing 1 includes a main body 11, a guide channel 12 penetrating the main body 11, a first receiving groove 13 and a ring-shaped second receiving groove 14 recessed by the outer surface of the guide housing 1.
  • the guide channel 12 is used to accommodate the vibration unit 2 and provide a vibration space for the vibration unit 2.
  • the first accommodating groove 13 includes two groups, and is arranged on opposite sides of the second accommodating groove 14 at intervals along the vibration direction of the vibrating unit 2; the first accommodating groove 13 is used for The auxiliary magnetic steel unit 4 is accommodated, and the second accommodating slot 14 is used for accommodating the coil unit 3 and the conductive damping unit 6.
  • the vibration unit 2 is accommodated in the guide channel 12 and forms a sliding connection, thereby forming a sliding vibration mode.
  • the vibration unit 2 includes a magnetic steel unit 21 and a mass 22.
  • the magnetic steel unit 21 is used to interact with the coil unit 3 to provide driving force.
  • the magnetic steel unit 21 includes a magnetic steel 211 and a soft magnetic block 212 attached to the magnetic pole of the magnetic steel 211.
  • the magnetic steel 211 includes two; the soft magnetic block 212 is sandwiched and fixed between the two magnetic steels 211 for magnetic conduction.
  • the number of the magnetic steel 211 and the soft magnetic block 212 is not limited to the above example.
  • 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 mass block 22 includes two masses and is attached to a side of the magnetic steel 211 away from the soft magnetic block 212 along the vibration direction.
  • the coil unit 3 is sleeved on the outside of the guide housing 1 to drive the vibration unit 2 to vibrate along the axial direction of the guide channel 1.
  • the coil unit 3 is accommodated and fixed in the second accommodating groove 14.
  • the fixing effect can be enhanced, and on the other hand, the overall volume of the linear vibration motor 100 can be reduced.
  • the auxiliary magnetic steel unit 4 is fixed to the guide housing 1 and is spaced apart from the vibration unit 2.
  • the auxiliary magnetic steel unit 4 acts as a magnetic spring structure, which is located in the magnetic field of the magnetic steel unit 21 to generate a vibration restoring force for restoring the vibration displacement of the vibration unit 2, that is, the vibration unit is in a horizontal position.
  • the reciprocating vibration in the vibration direction provides restoring force.
  • the auxiliary magnetic steel unit 4 includes two groups, and they are respectively arranged on opposite sides of the voice coil unit 3 along the vibration direction of the vibration unit 2.
  • each group of the auxiliary magnetic steel unit 4 includes two auxiliary magnetic steels 41, and the two auxiliary magnetic steels 41 are respectively arranged on opposite sides of the vibration unit 2 along a direction perpendicular to the vibration direction.
  • the structure and number of each group of auxiliary magnetic steel units 4 are not limited to the above examples.
  • the two sets of auxiliary magnetic steel units 4 are accommodated and fixed in the two sets of first accommodating slots 13 respectively.
  • the fixing effect can be enhanced, and on the other hand, the overall volume of the linear vibration motor 100 can be reduced.
  • the magnetization directions of the two magnets 211 of the magnet unit 21 are both parallel to the vibration direction, and the magnetization directions are opposite; the magnetization directions of the two sets of auxiliary magnet units 4 Similarly, the magnetizing direction of the two auxiliary magnets 41 in each group of auxiliary magnet unit 4 is perpendicular to the vibration direction, and the magnetic poles on the side of the auxiliary magnet 41 close to the magnet 211 are The magnetic poles of the magnetic steel 211 at one end away from the soft magnetic block 212 are opposite.
  • the conductive damping unit 6 is sleeved on the guide housing 1, and at least partially covers the coil unit 3, and is housed in the second accommodating slot 14 together with the coil unit 3, which can reduce the linear vibration motor 100
  • the conductive damping unit 6 is made of a material with high conductivity, such as copper, of course, it can also be other metal materials; therefore, the conductive damping unit 6 is less affected by the surrounding environment, such as not affected by temperature and humidity.
  • the performance of the linear vibration motor 100 is more stable.
  • the conductive damping unit 6 includes an upper damping unit 61 and a lower damping unit 62 that are disposed oppositely, and the upper damping unit 61 and the lower damping unit 62 are respectively disposed on the The opposite sides of the coil unit 3 are completely attached to the coil unit 3, and the upper damping unit 61 and the lower damping unit 62 cover a part of the coil unit; of course, the conductive damping unit 6 can also It is a one-piece structure.
  • the coil unit 3 interacts with the magnet unit 21 to provide the vibrating unit 2 with reciprocating driving force, and the auxiliary magnet unit 4 provides the vibrating reciprocating motion of the vibrating unit 2 during the vibrating reciprocating motion of the vibrating unit 2
  • the conductive damping unit 6 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.
  • the linear vibration unit 100 utilizes the principle of resonance. Driven by the coil unit 3 as a driving system, the maximum vibration displacement is generated near the resonance frequency of the auxiliary magnetic steel unit 4 and the conductive damping unit 6 to obtain the maximum shock sensation.
  • the magnetic field intensity of different parts of the conductive damping unit 6 also varies with each other.
  • the conductive damping unit 6 generates a local eddy current, thereby generating a back electromotive force that hinders the vibration of the vibrating unit 2, thereby generating an electromagnetic damping effect, which can vary with the magnitude of the vibration of the vibrating unit 2. Provides different damping forces.
  • the peripheral position of the coil unit 3 is the position where the electromagnetic field changes the most, when the conductive damping unit 6 is located near the coil unit 3, a higher electromagnetic damping effect can be achieved, that is, a better damping force can be provided. At the same time, the linear vibration motor 100 occupies a small volume.
  • the housing plate 5 includes two bodies 11 respectively fixed to the guide housing 1, and the two housing plates 5 are respectively located at opposite ends of the guide housing 1 along the axial direction of the guide channel 12, namely It is fixed to opposite ends of the main body 11, and the shell plate 5 at least partially covers the guide channel 12. In this embodiment, both of the two shell plates 5 completely cover the guide channel 12.
  • the vibration displacement of the vibration unit 2 can be adjusted according to different voltages, so as to obtain different vibration intensities, and is different from traditional motors.
  • the linear vibration motor 100 of the present invention forms a sliding magnetic spring vibration structure, Under high voltage, the vibration unit 2 can collide with the housing plate 5 to obtain a collision effect and bring more user experience.
  • the present invention adds a conductive damping unit on the basis of adding the auxiliary magnetic steel unit, and the conductive damping unit is sleeved on the guide shell.
  • the vibrating unit vibrates, the magnetic steel moves with the vibration of the vibrating unit, and the magnetic field formed by the magnetic steel also moves. Therefore, the magnetic field strength of different parts of the conductive damping unit also changes.
  • the conductive damping unit generates a local eddy current, thereby generating a back electromotive force that hinders the vibration of the vibration unit, that is, generates a damping force that hinders the movement of the vibration unit.
  • the damping force changes with the vibration of the vibration unit, so the present invention will provide better vibration performance and better reliability.
  • This utility model provides an embodiment of the utility model described above, which does not limit the scope of the utility model's patent. Any equivalent structure or equivalent process transformation made by using the content of the utility model description and drawings, or Directly or indirectly used in other related technical fields are included in the scope of patent protection of the utility model for the same reason.

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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（100），包括导向壳体（1）、振动单元（2）、线圈单元（3）、辅助磁钢单元（4）以及导电阻尼单元（6），导向壳体（1）包括本体（11）和贯穿本体（11）的导向通道（12）；振动单元（2）收容于导向通道（12）内并形成滑动连接，振动单元（2）包括磁钢单元（21）；线圈单元（3）套设于导向壳体（1）外侧，用以驱动振动单元（2）沿导向通道（12）的轴向振动；辅助磁钢单元（4）固定于导向壳体（1）并与振动单元（2）间隔设置，辅助磁钢单元（4）包括两组，沿振动方向分别设于线圈单元（3）的相对两侧；导电阻尼单元（6）套设于导向壳体（1），辅助磁钢单元（4）位于磁钢单元（21）的磁场内以产生恢复振动单元（2）振动位移的振动回复力，导电阻尼单元（6）位于磁钢单元（21）的磁场内产生阻碍振动单元运动的阻尼力。该线性振动电机（100）振动性能更好。

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或轴承，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，支撑振动单元使用金属弹性组件时，弹性组件振动位移小，无法提供更多的震感体验。
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
本实用新型的目的在于提供一种振感性能更好的线性振动电机。
为达到上述目的，本实用新型提供一种线性振动电机，其包括：
导向壳体，所述导向壳体包括本体和贯穿所述本体的导向通道；
振动单元，所述振动单元收容于所述导向通道内并形成滑动连接，所述振动单元包括磁钢单元；
线圈单元，所述线圈单元套设于所述导向壳体外侧，用以驱动所述振动单元沿所述导向通道的轴向振动；
辅助磁钢单元，所述辅助磁钢单元固定于所述导向壳体并与所述振动单元间隔设置，所述辅助磁钢单元位于所述磁钢单元的磁场内以产生用于恢复所述振动单元的振动位移的振动回复力；所述辅助磁钢单元包括两组，且沿所述振动单元的振动方向分别设于所述音圈单元的相对两侧； 以及,
导电阻尼单元，所述导电阻尼单元套设于所述导向壳体，所述导电阻尼单元位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，所述导电阻尼单元至少部分覆盖所述线圈单元。
优选的，所述导电阻尼单元包括相对设置的上阻尼单元和下阻尼单元，所述上阻尼单元与所述下阻尼单元沿垂直于所述振动方向分别设置于所述线圈单元的相对两侧且完全贴合于所述线圈单元。
优选的，两个所述导电阻尼单元覆盖所述线圈单元的一部分。
优选的，所述磁钢单元包括磁钢和贴设于所述磁钢的磁极处的软磁块。
优选的，所述磁钢包括两个，所述软磁块夹设固定于两个所述磁钢之间。
优选的，所述振动单元还包括质量块，所述质量块沿所述振动方向贴设于所述磁钢远离所述软磁块的一侧。
优选的，两个所述磁钢充磁方向均平行于所述振动方向，且充磁方向相反；每一组所述辅助磁钢单元包括两个辅助磁钢，且沿垂直于所述振动方向分别设置于所述振动单元的相对两侧；所述辅助磁钢单元的两个所述辅助磁钢的充磁方向垂直于所述振动方向，且所述辅助磁钢靠近所述磁钢的一侧的磁极与该磁钢远离所述软磁块一端的磁极相反。
优选的，所述线性振动电机还包括固定于所述导向壳体的两个外壳板，两个所述外壳板沿所述导向通道的轴向分别位于所述导向壳体的相对两端，且所述外壳板至少部分覆盖所述导向通道。
优选的，所述导向壳体的外表面凹陷形成两组第一收容槽和呈环状的第二收容槽，两组所述第一收容槽沿所述振动方向间隔设置于所述第二收容槽的相对两侧，两组所述辅助磁钢单元分别收容固定于两组所述第一收容槽内，所述线圈单元与所述导电阻尼单元收容固定于所述第二收容槽内。
 有益效果
与相关技术相比，本实用新型在增加所述辅助磁钢单元的基础上再增加导电阻尼单元，所述导电阻尼单元套设于所述导向壳体。当所述振动单元振动时，所述磁钢随着振动单元振动而移动，同时所述磁钢形成的磁场也随着移动，所述导电阻尼单元不同部位的磁场强度因此也发生变化，此时所述导电阻尼单元产生局部涡流，从而产生阻碍所述振动单元振动的反向电动势，即产生阻碍所述振动单元运动的阻尼力。所述阻尼力随着所述振动单元的振动发生变化，因此本实用新型会提供更好的振动性能，可靠性更好。
 附图说明
为了更清楚地说明本实用新型实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本实用新型的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图，其中：
图1为本实用新型线性振动电机的部分立体分解结构示意图；
图2为本实用新型线性振动电机的立体结构示意图；
图3为本实用新型图2沿A-A线的剖视图。
 本发明的实施方式
下面将结合本实用新型实施例中的附图，对本实用新型实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本实用新型的一部分实施例，而不是全部的实施例。基于本实用新型中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本实用新型保护的范围。
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，其包括导向壳体1、振动单元2、线圈单元3、辅助磁钢单元4、外壳板5以及导电阻尼单元6。
所述导向壳体1包括本体11、贯穿所述本体11的导向通道12、由导向壳体1的外表面凹陷形成第一收容槽13和呈环状的第二收容槽14。
导向通道12用于收容振动单元2，为振动单元2提供振动空间。
本实施方式中，所述第一收容槽13包括两组，并沿所述振动单元2的振动方向间隔设置于所述第二收容槽14的相对两侧；所述第一收容槽13用于收容所述辅助磁钢单元4，所述第二收容槽14用于收容线圈单元3和所述导电阻尼单元6。所述振动单元2收容于所述导向通道12内并形成滑动连接，从而形成滑动式振动方式。
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用于与所述线圈单元3相互作用以提供驱动力。
本实施方式中，磁钢单元21包括磁钢211和贴设于所述磁钢211的磁极处的软磁块212。具体的，所述磁钢211包括两个；所述软磁块212夹设固定于两个所述磁钢211之间，用于导磁。当然，所述磁钢211和所述软磁块212的数量不限于上述举例。
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，所述质量块22包括两个且沿所述振动方向贴设于所述磁钢211远离所述软磁块212的一侧。
所述线圈单元3套设于所述导向壳体1外侧，用以驱动所述振动单元2沿所述导向通道1的轴向振动。
本实施方式中，所述线圈单元3收容固定于所述第二收容槽14内。一方面可加强固定效果，另一方面可减小线性振动电机100整体体积。
所述辅助磁钢单元4固定于所述导向壳体1并与所述振动单元2间隔设置。所述辅助磁钢单元4为作磁性弹簧结构作用，其位于所述磁钢单元21的磁场内以产生用于恢复所述振动单元2的振动位移的振动回复力，即，为振动单元在水平振动方向的往复振动提供回复力。
本实施方式中，所述辅助磁钢单元4包括两组，且沿所述振动单元2的振动方向分别设于所述音圈单元3的相对两侧。
具体的，每一组所述辅助磁钢单元4包括两个辅助磁钢41，且该两个辅助磁钢41沿垂直于所述振动方向分别设置于所述振动单元2的相对两侧。当然，每组辅助磁钢单元4的结构和数量不限于上述举例。
本实施方式中，两组所述辅助磁钢单元4分别收容固定于两组所述第一收容槽13。一方面可加强固定效果，另一方面可减小线性振动电机100整体体积。
如图3中所示，本实施方式中，磁钢单元21的两个磁钢211充磁方向均平行于所述振动方向，且充磁方向相反；两组辅助磁钢单元4的充磁方向相同，每一组辅助磁钢单元4中的两个所述辅助磁钢41的充磁方向垂直于所述振动方向，且所述辅助磁钢41靠近所述磁钢211的一侧的磁极与该磁钢211远离所述软磁块212一端的磁极相反。
所述导电阻尼单元6套设于所述导向壳体1，且至少部分覆盖所述线圈单元3，与所述线圈单元3共同收容于所述第二收容槽14，可以减小线性振动电机100整体的体积。所述导电阻尼单元6由高导电率的材料制成，如铜，当然也可以为其他金属材料；因此所述导电阻尼单元6受周边环境影响较小，比如不会受到温度及湿度的影响，使所述线性振动电机100的性能更加稳定。
本实施方式中，所述导电阻尼单元6包括相对设置的上阻尼单元61和下阻尼单元62，所述上阻尼单元61与所述下阻尼单元62沿垂直于所述振动方向分别设置于所述线圈单元3的相对两侧且完全贴合于所述线圈单元3，所述上阻尼单元61与所述下阻尼单元62覆盖所述所述线圈单元的一部分；当然所述导电阻尼单元6也可以为一体成型结构。
线圈单元3与磁钢单元21相互作用给所述振动单元2提供往复运动的驱动力，所述辅助磁钢单元4与在振动单元2的振动往复运动中提供给所述振动单元2振动的往复力，所述导电阻尼单元6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。线性振动单元100利用共振原理，在线圈单元3作为驱动系统的驱动下，在辅助磁钢单元4和导电阻尼单元6共振频率附近产生最大振动位移，从而获得最大震感。
具体的，当所述振动单元2在所述线圈单元3与所述磁钢单元21的磁场下进行振动，带动所述磁场进行移动，此时所述导电阻尼单元6不同部位的磁场强度也随着所述磁场的移动而变化，所述导电阻尼单元6产生局部涡流，从而产生阻碍所述振动单元2振动的反向电动势，因此产生电磁阻尼效应，可以随所述振动单元2振动的大小而提供不同的阻尼力。
另外，因所述线圈单元3周边位置为电磁场变化最大的位置，当所述导电阻尼单元6位于所述线圈单元3附近时，可以达到较高的电磁阻尼效果，即可以提供更好的阻尼力，同时占用所述线性振动电机100体积较小。
外壳板5包括两个且分别固定于所述导向壳体1的本体11，两个所述外壳板5沿所述导向通道12的轴向分别位于所述导向壳体1的相对两端，即固定于本体11的相对两端，且所述外壳板5至少部分覆盖所述导向通道12。本实施方式中，两个外壳板5均完全覆盖导向通道12。
使用该线性振动电机100时，可根据不同电压调节振动单元2的振动位移，从而获得不同振动强度，并且区别于传统电机，本实用新型的线性振动电机100形成滑动式磁弹簧振动结构，在一定高电压下，可使振动单元2与外壳板5碰撞以获得碰撞效果，带来更多的用户体验。
与相关技术相比，本实用新型在增加所述辅助磁钢单元的基础上再增加导电阻尼单元，所述导电阻尼单元套设于所述导向壳体。当所述振动单元振动时，所述磁钢随着振动单元振动而移动，同时所述磁钢形成的磁场也随着移动，所述导电阻尼单元不同部位的磁场强度因此也发生变化，此时所述导电阻尼单元产生局部涡流，从而产生阻碍所述振动单元振动的反向电动势，即产生阻碍所述振动单元运动的阻尼力。所述阻尼力随着所述振动单元的振动发生变化，因此本实用新型会提供更好的振动性能，可靠性更好。
本实用新型提供一种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，其特征在于，其包括：
    导向壳体，所述导向壳体包括本体和贯穿所述本体的导向通道；
    振动单元，所述振动单元收容于所述导向通道内并形成滑动连接，所述振动单元包括磁钢单元；
    线圈单元，所述线圈单元套设于所述导向壳体外侧，用以驱动所述振动单元沿所述导向通道的轴向振动；
    辅助磁钢单元，所述辅助磁钢单元固定于所述导向壳体并与所述振动单元间隔设置，所述辅助磁钢单元位于所述磁钢单元的磁场内以产生用于恢复所述振动单元的振动位移的振动回复力；所述辅助磁钢单元包括两组，且沿所述振动单元的振动方向分别设于所述音圈单元的相对两侧； 以及,
    导电阻尼单元，所述导电阻尼单元套设于所述导向壳体，所述导电阻尼单元位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，所述导电阻尼单元至少部分覆盖所述线圈单元。
  3. 根据权利要求2所述的线性振动电机，其特征在于，所述导电阻尼单元包括相对设置的上阻尼单元和下阻尼单元，所述上阻尼单元与所述下阻尼单元沿垂直于所述振动方向分别设置于所述线圈单元的相对两侧且完全贴合于所述线圈单元。
  4. 根据权利要求3所述的线性振动电机，其特征在于，两个所述导电阻尼单元覆盖所述线圈单元的一部分。
  5. 根据权利要求1所述的线性振动电机，其特征在于，所述磁钢单元包括磁钢和贴设于所述磁钢的磁极处的软磁块。
  6. 根据权利要求5所述的线性振动电机，其特征在于，所述磁钢包括两个，所述软磁块夹设固定于两个所述磁钢之间。
  7. 根据权利要求6所述的线性振动电机，其特征在于，所述振动单元还包括质量块，所述质量块沿所述振动方向贴设于所述磁钢远离所述软磁块的一侧。
  8. 根据权利要求6所述的线性振动电机，其特征在于，两个所述磁钢充磁方向均平行于所述振动方向，且充磁方向相反；每一组所述辅助磁钢单元包括两个辅助磁钢，且沿垂直于所述振动方向分别设置于所述振动单元的相对两侧；所述辅助磁钢单元的两个所述辅助磁钢的充磁方向垂直于所述振动方向，且所述辅助磁钢靠近所述磁钢的一侧的磁极与该磁钢远离所述软磁块一端的磁极相反。
  9. 根据权利要求1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固定于所述导向壳体的两个外壳板，两个所述外壳板沿所述导向通道的轴向分别位于所述导向壳体的相对两端，且所述外壳板至少部分覆盖所述导向通道。
  10. 根据权利要求3所述的线性振动电机，其特征在于，所述导向壳体的外表面凹陷形成两组第一收容槽和呈环状的第二收容槽，两组所述第一收容槽沿所述振动方向间隔设置于所述第二收容槽的相对两侧，两组所述辅助磁钢单元分别收容固定于两组所述第一收容槽内，所述线圈单元与所述导电阻尼单元收容固定于所述第二收容槽内。
PCT/CN2019/127601 2019-12-23 2019-12-23 线性振动电机 WO2021127908A1 (zh)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11178304A (ja) * 1997-12-08 1999-07-02 Star Micronics Co Ltd 振動装置
CN101707461A (zh) * 2009-11-30 2010-05-12 哈尔滨工业大学 空间机械臂用无通电结构电机制动器
CN109889008A (zh) * 2019-03-15 2019-06-14 金龙机电（淮北）有限公司 一种线性振动器的阻尼结构及其阻尼控制方式
CN209402388U (zh) * 2019-03-15 2019-09-17 金龙机电（淮北）有限公司 一种线性振动器的阻尼结构

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11178304A (ja) * 1997-12-08 1999-07-02 Star Micronics Co Ltd 振動装置
CN101707461A (zh) * 2009-11-30 2010-05-12 哈尔滨工业大学 空间机械臂用无通电结构电机制动器
CN109889008A (zh) * 2019-03-15 2019-06-14 金龙机电（淮北）有限公司 一种线性振动器的阻尼结构及其阻尼控制方式
CN209402388U (zh) * 2019-03-15 2019-09-17 金龙机电（淮北）有限公司 一种线性振动器的阻尼结构

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