WO2021196315A1 - 线性振动马达 - Google Patents
线性振动马达 Download PDFInfo
- Publication number
- WO2021196315A1 WO2021196315A1 PCT/CN2020/086339 CN2020086339W WO2021196315A1 WO 2021196315 A1 WO2021196315 A1 WO 2021196315A1 CN 2020086339 W CN2020086339 W CN 2020086339W WO 2021196315 A1 WO2021196315 A1 WO 2021196315A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- magnet
- magnetic steel
- unit
- auxiliary
- vibration
- Prior art date
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Classifications
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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
- H02K33/02—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs
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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
- 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
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- 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
- H02K41/02—Linear motors; Sectional motors
Definitions
- the utility model relates to a motor, in particular to a linear vibration motor used in the field of mobile electronic products.
- vibration motors for system feedback.
- mobile phone call reminders information reminders
- navigation reminders and vibration feedback from game consoles.
- vibration motor to have excellent performance and long service life.
- a related art vibration motor includes a guide housing having a housing space, a vibration unit accommodated in the guide housing, a coil unit sleeved on the outside of the guide housing, and an auxiliary magnet unit fixed to the guide housing , Through the interaction of the electric field generated by the coil unit, the vibration unit and the magnetic field generated by the auxiliary magnetic steel, the vibration unit is driven to make a reciprocating linear motion to generate vibration.
- the vibration unit makes a reciprocating linear motion on the guide housing, and friction between the vibration unit and the guide housing causes severe wear and failure of the vibration unit and the guide housing.
- the shaft structure support is adopted, which has high cost and complicated production.
- the technical problem to be solved by the utility model is to provide a linear vibration motor which can be miniaturized, can be mass-produced, has low cost and has a long service life.
- the present utility model provides a linear vibration motor, which includes:
- a guide sleeve includes a body portion and a guide channel penetrating the body portion along the axial direction thereof;
- the vibration unit is received in the guide channel and forms a sliding connection, the vibration unit includes a magnetic steel unit, the magnetic steel unit includes a first magnetic steel and a second magnetic steel, the first magnetic steel Arranged opposite to the second magnetic steel, and the polarities of the ends of the first magnetic steel and the second magnetic steel close to each other are the same;
- a coil the coil is sleeved and fixed on the outer side of the guide sleeve, the coil and the magnetic steel unit generate a driving force that drives the vibrating unit to reciprocate along the axial direction of the guide channel;
- the auxiliary magnet unit is fixed to the guide sleeve, the auxiliary magnet unit includes a first auxiliary magnet and a second auxiliary magnet; the first auxiliary magnet is arranged on the guide sleeve And the projection of the first auxiliary magnet is located on the first magnet, the end of the first auxiliary magnet close to the coil and the pole of the first magnet close to the end of the second magnet The same; the second auxiliary magnet is arranged on the outside of the guide sleeve and the projection of the second auxiliary magnet is located on the second magnet, and the second auxiliary magnet is close to the end of the coil and The polarity of one end of the second magnet close to the first magnet is the same.
- the first auxiliary magnetic steel and the second auxiliary magnetic steel have a ring structure.
- the auxiliary magnetic steel unit is located in the magnetic field of the magnetic steel unit to generate a repulsive force that suspends the vibration unit in the guide sleeve.
- the magnetic steel unit further includes an iron core interposed and fixed between the first magnetic steel and the second magnetic steel, and the iron core and the coil are arranged directly opposite to each other.
- the vibration unit further includes two counterweights, and one of the counterweights is provided on the side of the first magnetic steel and the second magnetic steel away from the coil.
- the magnetization directions of the first magnet and the second magnet are both parallel to the vibration direction of the vibration unit; the magnetization directions of the first and second auxiliary magnets are both parallel to the vibration direction of the vibration unit.
- the linear vibration motor further includes two end caps fixed to the guide sleeve, one end cap is provided at opposite ends of the guide sleeve, and the end cap at least partially covers the guide channel .
- the first auxiliary magnet and the second auxiliary magnet are both sleeved and fixed to the guide sleeve, and the first auxiliary magnet and the second auxiliary magnet are along the vibrating unit
- the vibration directions are respectively arranged on opposite sides of the coil.
- the auxiliary magnetic steel unit includes a first auxiliary magnetic steel and a second auxiliary magnetic steel;
- the projection of the first auxiliary magnet is located on the first magnet, and the end of the first auxiliary magnet close to the coil has the same polarity as the end of the first magnet close to the second magnet;
- the second auxiliary magnet is arranged on the outer side of the guide sleeve and the projection of the second auxiliary magnet is located on the second magnet.
- the second auxiliary magnet is close to one end of the coil and the second magnet
- the polarity of one end of the magnet close to the first magnet is the same; the auxiliary magnet unit is located in the magnetic field of the magnet unit to generate a vibration restoring force for restoring the vibration displacement of the vibration unit, thereby forming a sliding type
- the magnetic spring vibration structure avoids the shortage of service life caused by the use of traditional shrapnel due to its own fatigue and other problems, and effectively improves the service life of the linear vibration motor.
- the location of the auxiliary magnetic steel unit in the magnetic field of the magnetic steel unit also generates a repulsive force that causes the vibration unit to suspend in the guide sleeve, which prevents the vibration unit from contacting the guide sleeve.
- the problem of friction loss between the vibration unit and the guide sleeve is solved, and the service life of the linear vibration motor is further improved, and the guide sleeve does not need to be provided with a shaft structure to support the vibration unit, so that the volume of the guide sleeve can be designed It is smaller, so that the linear vibration motor can be miniaturized, can be mass-produced, and has a lower processing cost.
- 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 the three-dimensional structure of the linear vibration motor of the utility model
- 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 that can be miniaturized, mass-produced, low cost and long service life, which includes a guide sleeve 1, a vibration unit 2, a coil 3, and a linear vibration motor 100. Auxiliary magnet unit 4 and end cover 5.
- the guide sleeve 1 includes a body portion 11 and a guide channel 12 penetrating the body portion 11 along its axial direction.
- the guide channel 12 is used to accommodate the vibration unit 2 and provide a vibration space for 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 vibration unit 2 includes a magnetic steel unit 21 for interacting with the coil 3 to provide the vibration unit 2 with a reciprocating driving force.
- the magnetic steel unit 21 includes a first magnetic steel 211 and a second magnetic steel 212, the first magnetic steel 211 and the second magnetic steel 212 are arranged oppositely, and the first magnetic steel 211 and The polarities of the ends of the second magnets 212 close to each other are the same.
- the magnetic steel unit 21 further includes an iron core 213 interposed and fixed between the first magnetic steel 211 and the second magnetic steel 212, the iron core 213 is used for magnetic conduction, and the iron core 213 It is arranged directly opposite to the coil 3.
- the number of the first magnetic steel 211, the second magnetic steel 212 and the iron core 213 is not limited to the above example.
- the vibration unit 2 further includes two counterweights 22.
- the two counterweights 22 are used for counterweights.
- the weight of the vibration unit 2 is increased to increase the vibration amplitude of the vibration unit 2 and improve the vibration.
- the first magnetic steel 211 and the second magnetic steel 212 are each provided with one counterweight on the side away from the coil 3.
- the coil 3 is sleeved and fixed on the outer side of the guide sleeve 1, and the coil 3 interacts with the magnetic steel unit 21 to generate a driving force that drives the vibrating unit 2 to reciprocate along the axial direction of the guide channel 12.
- the auxiliary magnet unit 4 is fixed to the guide sleeve 1. Further, the auxiliary magnet unit 4 includes a first auxiliary magnet 41 and a second auxiliary magnet 42.
- the first auxiliary magnet 41 is arranged at The outer side of the guide sleeve 1 and the projection of the first auxiliary magnet 41 is located on the first magnet 211, one end of the first auxiliary magnet 41 close to the coil 3 and the first magnet 211
- the polarity of one end close to the second magnet 212 is the same;
- the second auxiliary magnet 42 is arranged on the outside of the guide sleeve 1 and the projection of the second auxiliary magnet 42 is located on the second magnet 212 ,
- the end of the second auxiliary magnet 42 close to the coil 3 and the end of the second magnet 212 close to the first magnet 211 have the same polarity;
- the first auxiliary magnet 41 and the first magnet 211 have the same polarity.
- the second auxiliary magnet 42 has a ring structure.
- the magnetization directions of the first magnet 211 and the second magnet 212 are both parallel to the vibration direction of the vibration unit 2; the first auxiliary magnet 41 and the second auxiliary magnet 42 The magnetizing directions are parallel to the vibration direction of the vibration unit 2.
- the coil 3 interacts with the magnetic steel unit 21 to provide a reciprocating driving force for the vibration unit 2
- the auxiliary magnetic steel unit 4 functions as a magnetic spring structure and is located in the magnetic steel unit 21 to generate a vibration restoring force for restoring the vibration displacement of the vibrating unit 2, that is, to provide restoring force for the reciprocating vibration of the vibrating unit 2 in the horizontal vibration direction.
- the auxiliary magnetic steel unit 4 located in the magnetic field of the magnetic steel unit 21 not only generates a vibration restoring force for restoring the vibration displacement of the vibration unit 2, but also generates a repulsive force so that the The vibration unit 2 is suspended in the guide sleeve 1, which prevents the vibration unit 2 from contacting the guide sleeve 1, solves the problem of friction loss between the vibration unit 2 and the guide sleeve 1, thereby improving the use of the linear vibration motor 100 life.
- the guide sleeve of the traditional vibration motor needs to be provided with a shaft structure to support the vibration unit, and the auxiliary magnetic steel unit 4 is located in the magnetic field of the magnetic steel unit 21 to cause the vibration unit 2 to float on the guide sleeve.
- the repulsive force within 1 does not require the same shaft structure as the traditional guide sleeve to support the vibration unit, so that the volume of the guide sleeve 1 can be designed to be smaller, and the linear vibration motor 100 can be miniaturized and measured. Production, and the processing cost is lower.
- the function of the guide sleeve 1 is only to restrain the vibration unit 2 when the linear vibration motor 10 receives an external impact or stops working.
- the first auxiliary magnet 41 and the second auxiliary magnet 42 are both sleeved and fixed to the guide sleeve 1, and the first auxiliary magnet 41 and the second auxiliary magnet Steel 42 is respectively provided on opposite sides of the coil 3 along the vibration direction of the vibration unit 2.
- the polarity of the end of the first auxiliary magnet 41 close to the coil 3 and the end of the first magnet 211 close to the second magnet 212 are the same, and the second auxiliary magnet 42. Under the condition that the polarity of the end of 42 close to the coil 3 and the end of the second magnet 212 close to the first magnet 211 are the same, it is only necessary to ensure that the first auxiliary magnet 41 and the second auxiliary magnet 41 have the same polarity.
- the projections of the magnet 42 are respectively located on the first magnet 211 and the second magnet 212, which can produce the above-mentioned effect.
- the first auxiliary magnet 41 and the second auxiliary magnet 42 are sleeved and fixed to the The outer side of the guide sleeve 1 is still housed and fixed on the inner side of the guide sleeve 1, which can be set according to specific conditions.
- 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 linear vibration motor 100 further includes two end covers 5 fixed to the guide sleeve 1, and the opposite ends of the guide sleeve 1 are each provided with one end cover 5, and the end covers 5 The cover 5 at least partially covers 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 end cover 5 to obtain a collision effect and bring more user experience.
- the auxiliary magnetic steel unit includes a first auxiliary magnetic steel and a second auxiliary magnetic steel;
- the projection of the first auxiliary magnet is located on the first magnet, and the end of the first auxiliary magnet close to the coil has the same polarity as the end of the first magnet close to the second magnet;
- the second auxiliary magnet is arranged on the outer side of the guide sleeve and the projection of the second auxiliary magnet is located on the second magnet.
- the second auxiliary magnet is close to one end of the coil and the second magnet
- the polarity of one end of the magnet close to the first magnet is the same; the auxiliary magnet unit is located in the magnetic field of the magnet unit to generate a vibration restoring force for restoring the vibration displacement of the vibration unit, thereby forming a sliding type
- the magnetic spring vibration structure avoids the service life shortage caused by the use of traditional shrapnel due to its own fatigue and other problems, and effectively improves the service life of the linear vibration motor.
- the location of the auxiliary magnetic steel unit in the magnetic field of the magnetic steel unit also generates a repulsive force that causes the vibration unit to suspend in the guide sleeve, which prevents the vibration unit from contacting the guide sleeve.
- the problem of friction loss between the vibration unit and the guide sleeve is solved, and the service life of the linear vibration motor is further improved, and the guide sleeve does not need to be provided with a shaft structure to support the vibration unit, so that the volume of the guide sleeve can be designed It is smaller, so that the linear vibration motor can be miniaturized, can be mass-produced, and has a lower processing cost.
Abstract
本实用新型提供了一种线性振动马达，包括导向套、振动单元、线圈以及辅助磁钢单元；导向套包括本体部和导向通道；振动单元收容于导向通道内并形成滑动连接，振动单元包括磁钢单元，磁钢单元包括第一磁钢和第二磁钢；辅助磁钢单元包括第一辅助磁钢和第二辅助磁钢，第一辅助磁钢靠近线圈的一端与第一磁钢靠近第二磁钢一端的极性相同；第二辅助磁钢靠近线圈的一端与第二磁钢靠近第一磁钢一端的极性相同。与相关技术相比，本实用新型的线性振动马达可微型化，可量产，成本低，使用寿命长。
Description
本实用新型涉及一种马达，尤其涉及一种运用在移动电子产品领域的线性振动马达。
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马达来做系统反馈，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，就要求振动马达的性能优，使用寿命长。
相关技术的振动马达包括具有收容空间的导向壳体、收容于所述导向壳体的振动单元、套设于所述导向壳体外侧的线圈单元以及固定于所述导向壳体的辅助磁钢单元，通过所述线圈单元产生的电场、所述振动单元和所述辅助磁钢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。
然而，相关技术的振动马达中，振动单元在导向壳体做往复直线运动，振动单元与导向壳体产生摩擦，致使振动单元和导向壳体磨损严重而失效，且振动单元与导向壳体之间采用的是轴结构支撑，其成本较高，生产复杂。
因此，有必要提供一种新的线性振动马达解决上述问题。
本实用新型需要解决的技术问题是提供一种可微型化、可量产、成本低以及使用寿命长的线性振动马达。
为解决上述技术问题，本实用新型提供了一种线性振动马达，其包括：
导向套，所述导向套包括本体部和沿其轴向贯穿所述本体部的导向通道；
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，所述磁钢单元包括第一磁钢和第二磁钢，所述第一磁钢和所述第二磁钢呈相对设置，且所述第一磁钢和所述第二磁钢相互靠近的一端的极性相同；
线圈，所述线圈套设固定于所述导向套的外侧，所述线圈与所述磁钢单元作用产生驱动所述振动单元沿所述导向通道的轴向往复运动的驱动力；以及，
辅助磁钢单元，所述辅助磁钢单元固定于所述导向套，所述辅助磁钢单元包括第一辅助磁钢和第二辅助磁钢；所述第一辅助磁钢设置于所述导向套的外侧且所述第一辅助磁钢的投影位于所述第一磁钢，所述第一辅助磁钢靠近所述线圈的一端与所述第一磁钢靠近所述第二磁钢一端的极性相同；所述第二辅助磁钢设置于所述导向套的外侧且所述第二辅助磁钢的投影位于所述第二磁钢，所述第二辅助磁钢靠近所述线圈的一端与所述第二磁钢靠近所述第一磁钢一端的极性相同。
优选的，所述第一辅助磁钢和所述第二辅助磁钢为环状结构。
优选的，所述辅助磁钢单元位于所述磁钢单元的磁场内产生使所述振动单元悬浮于所述导向套内的斥力。
优选的，所述磁钢单元还包括夹设固定于所述第一磁钢和第二磁钢之间的铁芯，所述铁芯与所述线圈正对设置。
优选的，所述振动单元还包括两个配重块，所述第一磁钢和所述第二磁钢远离所述线圈的一侧各设置一个所述配重块。
优选的，所述第一磁钢和第二磁钢的充磁方向均平行于所述振动单元的振动方向；所述第一辅助磁钢和第二辅助磁钢的充磁方向均平行于所述振动单元的振动方向。
优选的，所述线性振动马达还包括固定于所述导向套的两个端盖，所述导向套的相对两端各设置一个所述端盖，且所述端盖至少部分覆盖所述导向通道。
优选的，所述第一辅助磁钢和所述第二辅助磁钢均套设固定于所述导向套，且所述第一辅助磁钢和所述第二辅助磁钢沿所述振动单元的振动方向分别设于所述线圈的相对两侧。
与相关技术相比，本实用新型的线性振动马达，所述辅助磁钢单元包括第一辅助磁钢和第二辅助磁钢；所述第一辅助磁钢设置于所述导向套的外侧且所述第一辅助磁钢的投影位于所述第一磁钢，所述第一辅助磁钢靠近所述线圈的一端与所述第一磁钢靠近所述第二磁钢一端的极性相同；所述第二辅助磁钢设置于所述导向套的外侧且所述第二辅助磁钢的投影位于所述第二磁钢，所述第二辅助磁钢靠近所述线圈的一端与所述第二磁钢靠近所述第一磁钢一端的极性相同；所述辅助磁钢单元位于所述磁钢单元的磁场内产生用于恢复所述振动单元的振动位移的振动回复力，从而形成滑动式磁弹簧振动结构，避免使用传统弹片因自身疲劳等问题导致的使用寿命短缺，有效的提高了该线性振动马达的使用寿命。另一方面，所述辅助磁钢单元位于所述磁钢单元的磁场内还产生了使所述振动单元悬浮于所述导向套内的斥力，避免了所述振动单元与所述导向套接触，解决了振动单元和导向套摩擦损耗的问题，进一步提高了所述线性振动马达的使用寿命，而且所述导向套不需要设置轴结构支撑所述振动单元，使所述导向套的体积可设计的更小，进而使所述线性振动马达可微型化，可量产，且加工成本更低。
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马达的立体结构示意图；
图2为本实用新型线性振动马达的立体结构分解示意图；
图3为沿图1中A-A线的剖视图。
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可微型化、可量产、成本低以及使用寿命长的线性振动马达100，其包括导向套1、振动单元2、线圈3以及辅助磁钢单元4以及端盖5。
所述导向套1包括本体部11和沿其轴向贯穿所述本体部11的导向通道12。所述导向通道12用于收容振动单元2，为振动单元2提供振动空间。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，所述磁钢单元21用于与所述线圈3相互作用为所述振动单元2提供往复运动的驱动力。
本实施方式中，磁钢单元21包括第一磁钢211和第二磁钢212，所述第一磁钢211和所述第二磁钢212呈相对设置，且所述第一磁钢211和所述第二磁钢212相互靠近的一端的极性相同。具体的，所述磁钢单元21还包括夹设固定于所述第一磁钢211和第二磁钢212之间铁芯213，所述铁芯213用于导磁，且所述铁芯213与所述线圈3正对设置。当然，所述第一磁钢211、所述第二磁钢212以及铁芯213的数量不限于上述举例。
具体的，所述振动单元2还包括两个配重块22，两个所述配重块22用于配重，增加所述振动单元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，所述第一磁钢211和所述第二磁钢212远离所述线圈3的一侧各设置一个所述配重块。
所述线圈3套设固定于所述导向套1的外侧，所述线圈3与所述磁钢单元21作用产生驱动所述振动单元2沿所述导向通道12的轴向往复运动的驱动力。
所述辅助磁钢单元4固定于所述导向套1，进一步的，所述辅助磁钢单元4包括第一辅助磁钢41和第二辅助磁钢42，所述第一辅助磁钢41设置于所述导向套1的外侧且所述第一辅助磁钢41的投影位于所述第一磁钢211，所述第一辅助磁钢41靠近所述线圈3的一端与所述第一磁钢211靠近所述第二磁钢212一端的极性相同；所述第二辅助磁钢42设置于所述导向套1的外侧且所述第二辅助磁钢42的投影位于所述第二磁钢212，所述第二辅助磁钢42靠近所述线圈3的一端与所述第二磁钢212靠近所述第一磁钢211一端的极性相同；所述第一辅助磁钢41和所述第二辅助磁钢42为环状结构。
在本实施方式中，所述第一磁钢211和第二磁钢212的充磁方向均平行于所述振动单元2的振动方向；所述第一辅助磁钢41和第二辅助磁钢42的充磁方向均平行于所述振动单元2的振动方向。
上述结构中，所述线圈3与磁钢单元21相互作用用以为所述振动单元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2在水平振动方向的往复振动提供回复力。
值得一提的是，所述辅助磁钢单元4位于所述磁钢单元21的磁场内不仅产生了用于恢复所述振动单元2的振动位移的振动回复力，还产生了斥力，使得所述振动单元2悬浮于所述导向套1内，避免了所述振动单元2与导向套1接触，解决了振动单元2和导向套1摩擦损耗的问题，进而提高了所述线性振动马达100的使用寿命。另一方面，传统的振动马达的导向套需要设置轴结构支撑振动单元，而所述辅助磁钢单元4位于所述磁钢单元21的磁场内产生使所述振动单元2悬浮于所述导向套1内的斥力，则不需要与传统的导向套一样设置轴结构来支撑振动单元，使所述导向套1的体积可设计的更小，进而使所述线性振动马达100可微型化，可量产，且加工成本更低。需要说明的是，所述导向套1的作用仅仅是在所述线性振动马达10受到外部冲击或停止工作时，对振动单元2起到约束作用。
在本实施方式中，所述第一辅助磁钢41和所述第二辅助磁钢42均套设固定于所述导向套1，且所述第一辅助磁钢41和所述第二辅助磁钢42沿所述振动单元2的振动方向分别设于所述线圈3的相对两侧。需要说明的是，在所述第一辅助磁钢41靠近所述线圈3的一端与所述第一磁钢211靠近所述第二磁钢212一端的极性相同，所述第二辅助磁钢42靠近所述线圈3的一端与所述第二磁钢212靠近所述第一磁钢211一端的极性相同的条件下，只需保证所述第一辅助磁钢41和所述第二辅助磁钢42的投影分别位于所述第一磁钢211和所述第二磁钢212，就能产生上述效果，至于所述第一辅助磁钢41和第二辅助磁钢42套设固定于所述导向套1的外侧还是收容固定于导向套1的内侧，可根据具体的情况进行设置。
更优的，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马达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。
在本实施方式中，所述线性振动马达100还包括固定于所述导向套1的两个端盖5，所述导向套1的相对两端各设置一个所述端盖5，且所述端盖5至少部分覆盖所述导向通道12。
使用该线性振动马达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马达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与端盖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马达，所述辅助磁钢单元包括第一辅助磁钢和第二辅助磁钢；所述第一辅助磁钢设置于所述导向套的外侧且所述第一辅助磁钢的投影位于所述第一磁钢，所述第一辅助磁钢靠近所述线圈的一端与所述第一磁钢靠近所述第二磁钢一端的极性相同；所述第二辅助磁钢设置于所述导向套的外侧且所述第二辅助磁钢的投影位于所述第二磁钢，所述第二辅助磁钢靠近所述线圈的一端与所述第二磁钢靠近所述第一磁钢一端的极性相同；所述辅助磁钢单元位于所述磁钢单元的磁场内产生用于恢复所述振动单元的振动位移的振动回复力，从而形成滑动式磁弹簧振动结构，避免了使用传统弹片因自身疲劳等问题导致的使用寿命短缺，有效的提高了该线性振动马达的使用寿命。另一方面，所述辅助磁钢单元位于所述磁钢单元的磁场内还产生了使所述振动单元悬浮于所述导向套内的斥力，避免了所述振动单元与所述导向套接触，解决了振动单元和导向套摩擦损耗的问题，进一步提高了所述线性振动马达的使用寿命所，而且所述导向套不需要设置轴结构支撑所述振动单元，使所述导向套的体积可设计的更小，进而使所述线性振动马达可微型化，可量产，且加工成本更低。
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 (8)
- 一种线性振动马达，其特征在于，其包括：导向套，所述导向套包括本体部和沿其轴向贯穿所述本体部的导向通道；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，所述磁钢单元包括第一磁钢和第二磁钢，所述第一磁钢和所述第二磁钢呈相对设置，且所述第一磁钢和所述第二磁钢相互靠近的一端的极性相同；线圈，所述线圈套设固定于所述导向套的外侧，所述线圈与所述磁钢单元作用产生驱动所述振动单元沿所述导向通道的轴向往复运动的驱动力；以及，辅助磁钢单元，所述辅助磁钢单元固定于所述导向套，所述辅助磁钢单元包括第一辅助磁钢和第二辅助磁钢；所述第一辅助磁钢设置于所述导向套的外侧且所述第一辅助磁钢的投影位于所述第一磁钢，所述第一辅助磁钢靠近所述线圈的一端与所述第一磁钢靠近所述第二磁钢一端的极性相同；所述第二辅助磁钢设置于所述导向套的外侧且所述第二辅助磁钢的投影位于所述第二磁钢，所述第二辅助磁钢靠近所述线圈的一端与所述第二磁钢靠近所述第一磁钢一端的极性相同。
- 根据权利要求1所述的线性振动马达，其特征在于，所述第一辅助磁钢和第二辅助磁钢为环状结构。
- 根据权利要求2所述的线性振动马达，其特征在于，所述辅助磁钢单元位于所述磁钢单元的磁场内产生使所述振动单元悬浮于所述导向套内的斥力。
- 根据权利要求2所述的线性振动马达，其特征在于，所述磁钢单元还包括夹设固定于所述第一磁钢和第二磁钢之间的铁芯，所述铁芯与所述线圈正对设置。
- 根据权利要求2或4所述的线性振动马达，其特征在于，所述振动单元还包括两个配重块，所述第一磁钢和所述第二磁钢远离所述线圈的一侧各设置一个所述配重块。
- 根据权利要求2所述的线性振动马达，其特征在于，所述第一磁钢和第二磁钢的充磁方向均平行于所述振动单元的振动方向；所述第一辅助磁钢和第二辅助磁钢的充磁方向均平行于所述振动单元的振动方向。
- 根据权利要求2所述的线性振动马达，其特征在于，所述线性振动马达还包括固定于所述导向套的两个端盖，所述导向套的相对两端各设置一个所述端盖，且所述端盖至少部分覆盖所述导向通道。
- 根据权利要求2所述的线性振动马达，其特征在于，所述第一辅助磁钢和所述第二辅助磁钢均套设固定于所述导向套，且所述第一辅助磁钢和所述第二辅助磁钢沿所述振动单元的振动方向分别设于所述线圈的相对两侧。
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| CN204271877U (zh) * | 2014-12-12 | 2015-04-15 | 成都气海机电制造有限公司 | 一种直线电机 |
| CN210093095U (zh) * | 2019-06-30 | 2020-02-18 | 瑞声科技（南京）有限公司 | 电机和驱动装置 |
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| JP2002239460A (ja) * | 2001-02-16 | 2002-08-27 | Miyota Kk | 加振器 |
| CN204271877U (zh) * | 2014-12-12 | 2015-04-15 | 成都气海机电制造有限公司 | 一种直线电机 |
| CN210093095U (zh) * | 2019-06-30 | 2020-02-18 | 瑞声科技（南京）有限公司 | 电机和驱动装置 |
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