WO2021127912A1 - 线性振动电机 - Google Patents

线性振动电机 Download PDF

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Publication number
WO2021127912A1
WO2021127912A1 PCT/CN2019/127607 CN2019127607W WO2021127912A1 WO 2021127912 A1 WO2021127912 A1 WO 2021127912A1 CN 2019127607 W CN2019127607 W CN 2019127607W WO 2021127912 A1 WO2021127912 A1 WO 2021127912A1
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WO
WIPO (PCT)
Prior art keywords
magnetic steel
unit
vibration
magnetic
bonding layer
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Application number
PCT/CN2019/127607
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English (en)
French (fr)
Inventor
凌芳华
浦晓峰
石梦珣
邵焱
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/CN2019/127607 priority Critical patent/WO2021127912A1/zh
Publication of WO2021127912A1 publication Critical patent/WO2021127912A1/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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path

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 surface and the surface between the magnetic steel, the counterweight and the soft magnetic steel are bonded by glue. If the glue layer bonded between the surface and the surface is too thin, the bonding fastness will be poor and easy Separation failure; the glue layer is too thick, the bonding pressure of the glue layer is difficult to control, and mass production is impossible, which causes the thickness of the glue layer to be uneven, the bonding force fluctuates, and there is probabilistic failure, and it is easy to overflow glue at the bonding position, causing soft pollution Magnets and counterweights affect the consistency and reliability of the linear vibration motor.
  • the technical problem to be solved by the utility model is to provide a linear vibration motor with good vibration performance and high reliability.
  • the present utility model provides a linear vibration motor, which includes:
  • a guide housing including a body and a guide channel penetrating the body;
  • the vibration unit is accommodated in the guide channel and forms a sliding connection;
  • the vibration unit includes a magnetic steel unit, a counterweight attached and fixed to the magnetic steel unit, and the magnetic steel unit and the
  • the weight block is glued and fixed with a glue bonding layer;
  • the glue bonding layer includes a first bonding layer, a second bonding layer and connecting the first bonding layer and the second bonding layer.
  • the third adhesive layer is a hollow tube;
  • the magnetic steel unit includes a magnetic steel and a soft magnetic block attached to the magnetic pole of the magnetic steel, and the counterweight and the soft magnetic block are respectively located at the On opposite sides of the magnetic steel, the magnetic steel is provided with a through hole penetrating therethrough along the vibration direction of the vibration unit, and the soft magnetic steel includes a soft magnetic steel main body and the soft magnetic steel main body is close to the A first boss protruding from one side of the magnet;
  • the counterweight includes a counterweight body and a second boss protruding and extending from the side of the counterweight body close to the magnet;
  • the third adhesive layer is inserted in the through hole, and the first boss and the second boss are both inserted in the third adhesive layer and pass through the third adhesive layer.
  • the first adhesive layer is located between the magnetic steel and the weight body, and forms the magnetic steel and the weight body into an adhesive fixation;
  • the second adhesive layer is located between the magnetic steel and the soft magnetic block main body, and bonds and fixes the magnetic steel and the soft magnetic steel main body;
  • 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 vibration restoring force of the vibration displacement of the unit.
  • the auxiliary magnetic steel unit includes two groups, which are respectively arranged on opposite sides of the coil unit along the vibration direction of the vibration unit.
  • each group of the auxiliary magnetic steel unit includes two auxiliary magnetic steels, which are respectively arranged on opposite sides of the vibration unit along a direction perpendicular to the vibration direction.
  • the magnetic steel includes two, and the soft magnetic block is sandwiched and fixed between the two magnetic steels; the counterweight includes two and is respectively fixed to the two magnetic steels away from the One side of the soft magnetic block; the glue bonding layer includes two, which are respectively arranged corresponding to the two magnetic steels.
  • the magnetization directions of the magnets are all parallel to the vibration direction, and the magnetization directions of the two magnets are opposite; the magnetization direction of the auxiliary magnet is perpendicular to the vibration direction, and The magnetic pole on the side of the auxiliary magnetic steel close to the magnetic steel is opposite to the magnetic pole on the side of the magnetic steel far 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 the first accommodating grooves, and the coil unit is accommodated and fixed in the second accommodating grooves.
  • the soft magnetic steel and the counterweight are respectively provided with a first boss and a second boss, and the magnetic steel is along the vibration direction of the vibration unit. It is provided with a through hole penetrating through it.
  • the through hole is equivalent to a glue storage tank.
  • the soft magnetic steel is provided with two first bosses
  • the counterweight is provided with a second boss
  • the glue bonding layer includes a first bonding layer and a second bonding layer that are arranged oppositely And a third adhesive layer in a hollow tube shape connecting the first adhesive layer and the second adhesive layer; the third adhesive layer is inserted into the through hole, and the first boss And the second boss are inserted into the third adhesive layer, and are bonded and fixed to the magnetic steel through the third adhesive layer;
  • the first adhesive layer is located in the magnetic steel And the main body of the counterweight, and the magnetic steel and the main body of the counterweight are bonded and fixed;
  • the second adhesive layer is located between the magnet and the main body of the soft magnetic block, The magnetic steel and the soft magnetic steel body are bonded and fixed.
  • the bonding area is increased and the bonding fastness is improved; on the other hand, the overall rigidity of the vibration unit is greatly improved , So that the vibration effect of the vibration unit is better, thereby improving the reliability of the linear vibration motor.
  • Figure 1 is a schematic diagram of the three-dimensional structure of the sound generating device of the present invention.
  • Figure 2 is an exploded view of a part of the three-dimensional structure of the sound device of the present invention.
  • Fig. 3 is a cross-sectional view taken along the line A-A in Fig. 1.
  • the present invention provides a linear vibration motor 100, a guide housing 1, a vibration unit 2, a coil unit 3, an auxiliary magnetic steel unit 4, and a housing plate 5.
  • 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 receiving groove 13 includes two groups, and they are arranged on opposite sides of the second receiving groove 14 at intervals along the vibration direction of the vibration unit 2.
  • the vibration unit 2 is accommodated in the guide channel 12 and forms a sliding connection, thereby forming a sliding vibration mode.
  • the vibrating unit 2 includes a magnetic steel unit 21, a weight 22 attached to the magnetic steel unit 21, and a glue bonding layer 23 for bonding and fixing the magnetic steel unit 21 and the weight 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 is provided with a through hole 2111 passing through it along the vibration direction of the vibration unit 2.
  • the soft magnetic steel 212 includes a soft magnetic steel main body 2121 and the soft magnetic steel main body 2121 is close to the magnetic steel 211 A first boss 2122 protrudes from one side.
  • the counterweight 22 includes a counterweight main body 221 and a second boss 222 protruding from a side of the counterweight main body 221 close to the magnetic steel 211.
  • the glue bonding layer 23 includes a first bonding layer 231, a second bonding layer 232, and a third hollow tube connecting the first bonding layer 231 and the second bonding layer 232. Bonding layer233.
  • the glue bonding layer 23 includes two, and they are respectively arranged corresponding to the two magnetic steels 211.
  • the third adhesive layer 233 is inserted in the through hole 2111, the first boss 2122 and the second boss 222 are both inserted in the third adhesive layer 233,
  • the third adhesive layer 233 is bonded and fixed to the magnetic steel 211;
  • the first adhesive layer 231 is located between the magnetic steel 211 and the weight body 221, and connects the magnetic The steel 211 and the weight body 221 are bonded and fixed;
  • the second adhesive layer 232 is located between the magnetic steel 211 and the soft magnetic block body 2121, and connects the magnetic steel 211 and the The soft magnetic steel main body 2121 is bonded and fixed.
  • the soft magnetic steel 212 and the counterweight 22 are respectively provided with a first boss 2122 and a second boss 222, and the magnetic steel 211 is provided along the vibration direction of the vibration unit 2.
  • the through hole 2111 is equivalent to a glue storage tank.
  • the soft magnetic steel 212 is provided with two first bosses 2122, the counterweight 22 is provided with a second boss 222;
  • the glue bonding layer 23 includes opposite first bonding Layer 231, a second adhesive layer 232, and a hollow tubular third adhesive layer 233 connecting the first adhesive layer 231 and the second adhesive layer 232;
  • the third adhesive layer 233 is inserted In the through hole 2111, the first boss 2122 and the second boss 222 are both inserted into the third adhesive layer 233, and pass through the third adhesive layer 233 and the
  • the magnetic steel 211 is bonded and fixed;
  • the first bonding layer 231 is located between the magnetic steel 211 and the weight body 221, and forms a bond between the magnetic steel 211 and the weight body 221 Fixed;
  • the second adhesive layer 232 is located between the magnetic steel 221 and the soft magnetic block main body 2121, and the magnetic steel 211 and the soft
  • 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 counterweight 22 is used for counterweight to increase the weight of the vibrating unit 2 to achieve the purpose of increasing the vibration amplitude of the vibrating unit 2 and improving the vibration performance.
  • the counterweight 22 includes two and is respectively fixed on the side of the two magnets 211 away from the soft magnetic block 212.
  • 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 magnetizing direction of the magnet 211 of the magnet unit 21 is parallel to the vibration direction, and the magnetizing directions of the two magnets are opposite; the auxiliary magnet 41
  • the magnetization direction of the auxiliary magnet 41 is perpendicular to the vibration direction, and the magnetic pole of the auxiliary magnet 41 close to the magnet 211 is opposite to the magnetic pole of the magnet 211 far away from the soft magnetic block 212.
  • the coil unit 3 interacts with the magnet unit 21 to provide a reciprocating driving force for the vibrating unit 2, and the auxiliary magnet unit 4 provides a restoring force similar to a traditional spring in the vibration reciprocating motion of the vibrating unit 2; linear vibration
  • the unit 100 uses the principle of resonance. Driven by the coil unit 3 as the drive system, the maximum vibration displacement is generated near the resonance frequency of the auxiliary magnetic steel unit 4, thereby obtaining the maximum shock sense.
  • the vibration displacement is 3-4 of the related-art linear vibration motor. Times, large displacement can excavate more vibration modes and bring more vibration experience.
  • the traditional spring is omitted, the assembly process is simpler, and the accuracy of the sauce is lower, which effectively improves the assembly efficiency and the yield of the finished product.
  • 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, which is high at a certain height. Under voltage, the vibration unit 2 can collide with the housing plate 5 to obtain a collision effect and bring more user experience.
  • the soft magnetic steel and the counterweight are respectively provided with a first boss and a second boss, and the magnetic steel is along the vibration direction of the vibration unit. It is provided with a through hole penetrating through it.
  • the through hole is equivalent to a glue storage tank.
  • the soft magnetic steel is provided with two first bosses
  • the counterweight is provided with a second boss
  • the glue bonding layer includes a first bonding layer and a second bonding layer that are arranged oppositely And a third adhesive layer in a hollow tube shape connecting the first adhesive layer and the second adhesive layer; the third adhesive layer is inserted into the through hole, and the first boss And the second boss are inserted into the third adhesive layer, and are bonded and fixed to the magnetic steel through the third adhesive layer;
  • the first adhesive layer is located in the magnetic steel And the main body of the counterweight, and the magnetic steel and the main body of the counterweight are bonded and fixed;
  • the second adhesive layer is located between the magnet and the main body of the soft magnetic block, The magnetic steel and the soft magnetic steel body are bonded and fixed.
  • the bonding area is increased and the bonding fastness is improved; on the other hand, the overall rigidity of the vibration unit is greatly improved , So that the vibration effect of the vibration unit is better, thereby improving the reliability of the linear vibration motor.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Electromagnetism (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Abstract

一种线性振动电机，包括导向壳体（1）、振动单元（2）、线圈单元（3）以及辅助磁钢单元（4），振动单元（2）包括磁钢单元（21）、配重块（22）以及胶水粘接层（23），磁钢单元（21）包括磁钢（211）和贴设于磁钢的磁极处的软磁块（212），磁钢（211）设有通孔（2111），软磁块（212）和配重块（22）分别设有第一凸台（2122）和第二凸台（222），胶水粘接层（23）包括第一粘接层（231）、第二粘接层（232）以及第三粘接层（233），第三粘接层（233）插设于通孔（2111）内，第一凸台（2122）和第二凸台（222）均插设于第三粘接层（233）内，并通过第三粘接层（233）粘接固定，第一粘接层（231）位于磁钢（211）与配重块主体（221）之间，并将磁钢与配重块主体形成粘接固定；第二粘接层（232）位于磁钢（211）与软磁块主体（2121）之间，并将磁钢和软磁块主体粘接固定。与相关技术相比，该线性振动电机的刚度高，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，磁钢、配重块以及软磁钢之间面与面通过胶水粘接，如果面与面粘接的胶水层太薄，导致粘接牢度差，易分离失效；胶水层太厚，胶水层粘接保压力难以控制，无法量产，使胶水层厚度不均一，粘接力波动大，存在概率性失效，并且在粘接位置容易溢胶，污染软磁钢和配重块，从而影响了线性振动电机的一致性和可靠性。
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，且可靠性高的线性振动电机。
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，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、贴设固定于所述磁钢单元的配重块以及将所述磁钢单元与所述配重块粘接固定的胶水粘接层；所述胶水粘接层包括相对设置的第一粘接层、第二粘接层以及连接所述第一粘接层和所述第二粘接层的呈中空管状的第三粘接层；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，所述配重块与所述软磁块分别位于所述磁钢的相对两侧，所述磁钢沿所述振动单元的振动方向设有贯穿其上的通孔，所述软磁钢包括软磁钢主体和由所述软磁钢主体靠近所述磁钢的一侧凸出延伸的第一凸台；所述配重块包括配重块主体和由所述配重块主体靠近所述磁钢的一侧凸出延伸的第二凸台；所述第三粘接层插设于所述通孔内，所述第一凸台和所述第二凸台均插设于所述第三粘接层内，并通过所述第三粘接层与所述磁钢粘接固定；所述第一粘接层位于所述磁钢与所述配重块主体之间，并将所述磁钢与所述配重块主体形成粘接固定；所述第二粘接层位于所述磁钢与所述软磁块主体之间，并将所述磁钢和所述软磁钢主体粘接固定；
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；以及
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。
优选的，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线圈单元的相对两侧。
优选的，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。
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；所述配重块包括两个且分别固定于两个所述磁钢远离所述软磁块的一侧；所述胶水粘接层包括两个，且分别与两个所述磁钢对应设置。
优选的，所述磁钢的充磁方向均平行于所述振动方向，且两个所述磁钢的充磁方向相反；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一侧的磁极与所述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，本实用新型的线性振动电机，所述软磁钢和所述配重块分别设有第一凸台和第二凸台，所述磁钢沿所述振动单元的振动方向设有贯穿其上的通孔，所述通孔相当于一个胶水存储槽，使用胶水粘接时，胶水用量余量较大，可有效的避免胶水溢出，污染所述软磁钢和所述配重块；所述软磁钢设有两个第一凸台，所述配重块设有第二凸台；所述胶水粘接层包括相对设置的第一粘接层、第二粘接层以及连接所述第一粘接层和所述第二粘接层的呈中空管状的第三粘接层；所述第三粘接层插设于所述通孔内，所述第一凸台和所述第二凸台均插设于所述第三粘接层内，并通过所述第三粘接层与所述磁钢粘接固定；所述第一粘接层位于所述磁钢与所述配重块主体之间，并将所述磁钢与所述配重块主体形成粘接固定；所述第二粘接层位于所述磁钢与所述软磁块主体之间，并将所述磁钢和所述软磁钢主体粘接固定，一方面，增大了粘接面积，提升了粘接牢度；另一方面，大幅度的提高了所述振动单元的整体刚度，使所述振动单元的振动效果更好，从而提高了线性振动电机的可靠性。
 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为本实用新型发声器件的立体结构示意图；
图2为本实用新型发声器件的部分立体结构分解图；
图3为沿图1中A-A线的剖示图。
 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，导向壳体1、振动单元2、线圈单元3、辅助磁钢单元4以及外壳板5。
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、贴设于所述磁钢单元21的配重块22以及将所述磁钢单元21与所述配重块22粘接固定的胶水粘接层23。
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，所述磁钢单元21包括磁钢211和贴设于所述磁钢211的磁极处的软磁块212，所述磁钢211沿所述振动单元2的振动方向设有贯穿其上的通孔2111，所述软磁钢212包括软磁钢主体2121和由所述软磁钢主体2121靠近所述磁钢211的一侧凸出延伸的第一凸台2122。
所述配重块22包括配重块主体221和由所述配重块主体221靠近所述磁钢211的一侧凸出延伸的第二凸台222。
所述胶水粘接层23包括相对设置的第一粘接层231、第二粘接层232以及连接所述第一粘接层231和所述第二粘接层232的呈中空管状的第三粘接层233。
在本实施方式中，所述胶水粘接层23包括两个，且分别与两个所述磁钢211对应设置。
具体的，所述第三粘接层233插设于所述通孔2111内，所述第一凸台2122和所述第二凸台222均插设于所述第三粘接层233内，并通过所述第三粘接层233与所述磁钢211粘接固定；所述第一粘接层231位于所述磁钢211与所述配重块主体221之间，并将所述磁钢211与所述配重块主体221形成粘接固定；所述第二粘接层232位于所述磁钢211与所述软磁块主体2121之间，并将所述磁钢211和所述软磁钢主体2121粘接固定。
在本实施方式中，所述软磁钢212和所述配重块22分别设有第一凸台2122和第二凸台222，所述磁钢211沿所述振动单元2的振动方向设有贯穿其上的通孔2111，所述通孔2111相当于一个胶水存储槽，使用胶水粘接时，胶水用量余量较大，可有效的避免胶水溢出，污染所述软磁钢212和所述配重块22；所述软磁钢212设有两个第一凸台2122，所述配重块22设有第二凸台222；所述胶水粘接层23包括相对设置的第一粘接层231、第二粘接层232以及连接所述第一粘接层231和所述第二粘接层232的呈中空管状的第三粘接层233；所述第三粘接层233插设于所述通孔2111内，所述第一凸台2122和所述第二凸台222均插设于所述第三粘接层233内，并通过所述第三粘接层233与所述磁钢211粘接固定；所述第一粘接231层位于所述磁钢211与所述配重块主体221之间，并将所述磁钢211与所述配重块主体221形成粘接固定；所述第二粘接层232位于所述磁钢221与所述软磁块主体2121之间，并将所述磁钢211和所述软磁钢主体2121粘接固定，一方面，增大了粘接面积，提升了粘接牢度；另一方面，大幅度的提高了所述振动单元2的整体刚度，使所述振动单元2的振动效果更好，从而提高了线性振动电机100的可靠性。
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。
配重块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，所述配重块22包括两个且分别固定于两个所述磁钢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的磁钢211充磁方向均平行于所述振动方向，且两个所述磁钢的充磁方向相反；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211一侧的磁极与所述磁钢211远离所述软磁块212一端的磁极相反。
线圈单元3与磁钢单元21相互作用用以为振动单元2提供往复运动的驱动力，辅助磁钢单元4在振动单元2的振动往复运动过程中提供类似传统弹簧的振动往复的回复力；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共振频率附近产生最大振动位移，从而获得最大震感，其振动位移为相关技术的线性振动电机的3-4倍，大位移可以挖掘更多的振动模式，带来更多振感体验。
由于振动单元2、导向通道12以及辅助磁钢单元4之间形成了滑动式磁弹簧振动结构，避免了使用传统弹簧结构提供支撑回复力时弹簧结构自身疲劳而失效的问题以及脱落的问题，有效的提高了线性振动电机100的使用寿命，且可靠性好。
另外，因形成滑动式磁弹簧振动结构，省去了传统弹簧，装配工序更简单，且酱精度要求更低，有效提高了装配效率的成品良率。
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，本实用新型的线性振动电机，所述软磁钢和所述配重块分别设有第一凸台和第二凸台，所述磁钢沿所述振动单元的振动方向设有贯穿其上的通孔，所述通孔相当于一个胶水存储槽，使用胶水粘接时，胶水用量余量较大，可有效的避免胶水溢出，污染所述软磁钢和所述配重块；所述软磁钢设有两个第一凸台，所述配重块设有第二凸台；所述胶水粘接层包括相对设置的第一粘接层、第二粘接层以及连接所述第一粘接层和所述第二粘接层的呈中空管状的第三粘接层；所述第三粘接层插设于所述通孔内，所述第一凸台和所述第二凸台均插设于所述第三粘接层内，并通过所述第三粘接层与所述磁钢粘接固定；所述第一粘接层位于所述磁钢与所述配重块主体之间，并将所述磁钢与所述配重块主体形成粘接固定；所述第二粘接层位于所述磁钢与所述软磁块主体之间，并将所述磁钢和所述软磁钢主体粘接固定，一方面，增大了粘接面积，提升了粘接牢度；另一方面，大幅度的提高了所述振动单元的整体刚度，使所述振动单元的振动效果更好，从而提高了线性振动电机的可靠性。
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 (7)

  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、贴设固定于所述磁钢单元的配重块以及将所述磁钢单元与所述配重块粘接固定的胶水粘接层；所述胶水粘接层包括相对设置的第一粘接层、第二粘接层以及连接所述第一粘接层和所述第二粘接层的呈中空管状的第三粘接层；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，所述配重块与所述软磁块分别位于所述磁钢的相对两侧，所述磁钢沿所述振动单元的振动方向设有贯穿其上的通孔，所述软磁钢包括软磁钢主体和由所述软磁钢主体靠近所述磁钢的一侧凸出延伸的第一凸台；所述配重块包括配重块主体和由所述配重块主体靠近所述磁钢的一侧凸出延伸的第二凸台；所述第三粘接层插设于所述通孔内，所述第一凸台和所述第二凸台均插设于所述第三粘接层内，并通过所述第三粘接层与所述磁钢粘接固定；所述第一粘接层位于所述磁钢与所述配重块主体之间，并将所述磁钢与所述配重块主体形成粘接固定；所述第二粘接层位于所述磁钢与所述软磁块主体之间，并将所述磁钢和所述软磁钢主体粘接固定；
    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；以及
    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。
  2. 根据权利要求1所述的线性振动电机，其特征在于，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线圈单元的相对两侧。
  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，所述线圈单元收容固定于所述第二收容槽内。
  4. 根据权利要求2所述的线性振动电机，其特征在于，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。
  5. 根据权利要求1所述的线性振动电机，其特征在于，所述磁钢包括两个，所述软磁块夹设固定于两个所述磁钢之间；所述配重块包括两个且分别固定于两个所述磁钢远离所述软磁块的一侧；所述胶水粘接层包括两个，且分别与两个所述磁钢对应设置。
  6. 根据权利要求5所述的线性振动电机，其特征在于，所述磁钢的充磁方向均平行于所述振动方向，且两个所述磁钢的充磁方向相反；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一侧的磁极与所述磁钢远离所述软磁块一端的磁极相反。
  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。
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