WO2021114307A1 - 线性振动电机 - Google Patents

线性振动电机 Download PDF

Info

Publication number
WO2021114307A1
WO2021114307A1 PCT/CN2019/125419 CN2019125419W WO2021114307A1 WO 2021114307 A1 WO2021114307 A1 WO 2021114307A1 CN 2019125419 W CN2019125419 W CN 2019125419W WO 2021114307 A1 WO2021114307 A1 WO 2021114307A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic
vibrator
spring member
magnet
magnetic spring
Prior art date
Application number
PCT/CN2019/125419
Other languages
English (en)
French (fr)
Inventor
马杰
汤赟
王尧
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
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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/CN2019/125419 priority Critical patent/WO2021114307A1/zh
Publication of WO2021114307A1 publication Critical patent/WO2021114307A1/zh

Links

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
    • 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
    • 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

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 housing with a housing space, a vibrator located in the housing space, an elastic member that fixes and suspends the vibrator in the housing space, and a coil assembly fixed to the housing.
  • the magnetic field generated by the coil interacts with the magnetic field generated by the vibrator, thereby driving the vibrator to make a reciprocating linear motion to generate vibration.
  • the coil assembly includes an iron core, two magnetic shoes extending from opposite ends of the iron core and fixed to the housing, and a coil wound around the iron core; the vibrator includes a movement along the iron core Two magnetic steels arranged in parallel and spaced apart from the coil assembly.
  • the magnetic attraction of the iron core and the magnetic shoe to the magnet steel of the negative stiffness causes the vibrator to have a positive stiffness.
  • the stiffness of the elastic member needs to be increased.
  • a relatively large design results in relatively large stress on the elastic member, which is likely to cause damage or deformation of the elastic member when the vibrator vibrates, which reduces the reliability of the product. Therefore, in order to solve the reliability problem caused by the increased rigidity of the elastic member, the design of the elastic member is changed, which in turn causes other defects to the performance of the linear vibration motor, such as increased displacement in the non-moving direction, Swing and so on.
  • 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 invention provides a linear vibration motor, which includes a housing with an accommodation space, a vibrator arranged in the accommodation space, and an elastic member suspending the vibrator in the accommodation space , And a coil assembly and a magnetic spring member that are fixed to the housing and drive the vibrator to move;
  • the vibrator includes a magnetic circuit system
  • the magnetic circuit system includes a magnetic circuit system that is respectively disposed on the coil assembly along the direction of movement of the vibrator
  • the first magnetic steel and the second magnetic steel on opposite sides of the first magnetic steel, the first magnetic steel and the second magnetic steel are magnetized along the movement direction of the vibrator, and the first magnetic steel and the second magnetic steel
  • the magnetic poles of the opposite sides of the magnetic steel are the same.
  • the magnetic spring member is a magnetic steel and is magnetized in a direction perpendicular to the movement direction of the vibrator.
  • the magnetic spring member includes opposing sides arranged on the coil assembly along the movement direction of the vibrator The first magnetic spring member and the second magnetic spring member on both sides, the magnetic pole of the first magnetic spring member and the second magnetic spring member facing the vibrator and the magnetic pole of the opposite side of the first magnetic steel and the second magnetic steel in contrast.
  • the magnetic spring member is a ring-shaped magnetic steel arranged on opposite sides of the coil assembly along the movement direction of the vibrator, and the ring-shaped magnetic steel is arranged around the vibrator.
  • the magnetic spring member further includes a third magnetic spring member and a fourth magnetic spring member arranged on opposite sides of the coil assembly along the movement direction of the vibrator, the third magnetic spring member and the The first magnetic spring member is respectively disposed on opposite sides of the vibrator, the fourth magnetic spring member and the second magnetic spring member are respectively disposed on opposite sides of the vibrator, the third magnetic spring member and The fourth magnetic spring member is all magnetic steel and is magnetized along the direction of movement perpendicular to the vibrator, and the third magnetic spring member and the fourth magnetic spring member face the magnetic poles of the vibrator and the first magnetic spring member.
  • the magnetic poles of the opposite sides of the magnetic steel and the second magnetic steel are opposite to each other.
  • the housing includes a bottom plate and an upper cover covering the bottom plate and enclosing the accommodating space together with the bottom plate, and the first magnetic spring member and the second magnetic spring member are respectively fixed to The bottom plate, the third magnetic spring member and the fourth magnetic spring member are fixed to the upper cover.
  • the magnetic circuit system further includes a third magnet and a fourth magnet respectively disposed on opposite sides of the coil assembly along the direction of movement of the vibrator, the third magnet and the The fourth magnet is magnetized in a direction perpendicular to the movement direction of the vibrator, the magnetic poles of the opposite faces of the third magnet and the fourth magnet are the same, and the opposite faces of the third magnet and the fourth magnet The magnetic poles of are opposite to the magnetic poles of the opposite sides of the first magnet and the second magnet.
  • the vibrator further includes a mass with a through hole and a ring-shaped magnetic frame fixed to the inner wall of the through hole, and the first magnetic steel and the second magnetic steel are respectively fixed to the magnetic frame
  • the third magnetic steel and the fourth magnetic steel are respectively fixed to the other opposite sides of the magnetic frame, and the coil assembly extends into the through hole and is spaced apart from the magnetic circuit system .
  • the coil assembly includes a metal member fixed to the housing and a coil wound around the metal member, and the metal member includes an iron core and an iron core along the movement direction of the vibrator.
  • Two magnetic shoes extending at opposite ends, the coil is wound around the iron core, the magnetic shoe is fixed to the housing, and the two magnetic shoes are connected to the first magnet and the first magnet respectively.
  • the two magnets are set directly opposite each other.
  • the elastic member includes two elastic members, and the two elastic members are respectively arranged on opposite sides of the vibrator along the movement direction of the vibrator.
  • the linear vibration motor of the present invention provides a first magnet and a second magnet that are magnetized along the direction of movement of the vibrator on the vibrator, wherein the first magnet and the second magnet are The magnetic poles of the opposite sides of the magnetic steel are the same; the magnetic spring member is fixed to the housing, wherein the magnetic spring member is a magnetic steel and is magnetized in a direction perpendicular to the movement direction of the vibrator.
  • the magnetic spring member includes The first magnetic spring member and the second magnetic spring member on opposite sides of the movement direction, the magnetic poles of the first magnetic spring member and the second magnetic spring member facing the vibrator are opposite to the magnetic poles of the opposite sides of the first magnetic steel and the second magnetic steel .
  • This structure enables the magnetic repulsion formed by the magnetic spring member and the magnetic circuit system, so that both the first magnetic steel and the second magnetic steel have positive rigidity to overcome the negative rigidity brought about by the iron core and the magnetic shoe in the related art, In turn, the rigidity requirement for the design of the elastic element is reduced, thereby improving the reliability.
  • the magnetic spring member and the elastic member jointly support the vibrator, which is also conducive to the stability of the linear vibration motor, thereby improving reliability.
  • Figure 1 is a three-dimensional structure diagram of the linear vibration motor of the utility model
  • Figure 2 is a partial structural diagram of the utility model linear vibration motor
  • Figure 3 is a cross-sectional view taken along line A-A in Figure 1;
  • Figure 4 is a partial structural assembly diagram of the linear vibration motor of the utility model with the shell removed
  • Figure 5 is a partial three-dimensional structure assembly diagram of the magnetic spring part, the vibrator with the mass removed and the coil assembly of the linear vibration motor of the utility model;
  • Fig. 6 is a sectional view taken along the line B-B in Fig. 5;
  • the present invention provides a linear vibration motor 100.
  • the linear vibration motor 100 includes a housing 1, a vibrator 2, an elastic member 3, a coil assembly 4, and a magnetic spring member 5 having a housing space 10. .
  • the housing 1 has a receiving space 10. Specifically, the housing 1 includes a bottom plate 11 and an upper cover 12 covering the bottom plate 11 and enclosing the containing space 10 together with the bottom plate 11.
  • the vibrator 2 is installed in the receiving space 10.
  • the vibrator 2 is supported and suspended in the receiving space 10 by the elastic member 3.
  • the vibrator 2 includes a magnetic circuit system 21, a mass 22 and a magnetic frame 23.
  • the magnetic circuit system 21 includes a first magnet 211, a second magnet 212, a third magnet 213, and a fourth magnet 214.
  • the first magnetic steel 211 and the second magnetic steel 212 are respectively disposed on two opposite sides of the coil assembly 4 along the moving direction of the vibrator 2.
  • the first magnetic steel 211 and the second magnetic steel 212 are respectively fixed to the two second side walls 232.
  • the first magnet 211 and the second magnet 212 are magnetized along the moving direction of the vibrator 2, and the magnetic poles of the opposite surfaces of the first magnet 211 and the second magnet 212 are the same.
  • the first magnet 211 and the second magnet 212 are energized with the coil assembly 4, they form electromagnetic attraction to drive the linear vibration motor 100.
  • the third magnet 213 and the fourth magnet 214 are respectively disposed on opposite sides of the coil assembly 4 along the direction perpendicular to the movement direction of the vibrator 2.
  • the third magnet 213 and the fourth magnet 214 are respectively fixed to the two first side walls 231.
  • the third magnet 213 and the fourth magnet 214 are magnetized in a direction perpendicular to the movement direction of the vibrator 2, and the magnetic poles of the opposite faces of the third magnet 213 and the fourth magnet 214 are the same.
  • the magnetic poles of the opposite surfaces of the third magnet 213 and the fourth magnet 214 are opposite to the magnetic poles of the opposite surfaces of the first magnet 211 and the second magnet 212.
  • the mass 22 is used to increase the weight of the vibrator 2 to ensure the strength of vibration.
  • the mass 22 has a through hole 20.
  • the magnetic frame 23 has a ring shape.
  • the magnetic frame 23 is embedded in the mass block 21. Specifically, the magnetic frame 23 is fixed to the inner wall of the through hole 20.
  • the magnetic frame 23 includes two first side walls 231 that are arranged parallel to the direction of movement of the vibrator 2 and are relatively spaced apart, and two second sides that are perpendicular to the direction of movement and are relatively spaced apart. ⁇ 232.
  • the two first side walls 231 and the two second side walls 232 are both fixed to the inner wall of the through hole 20.
  • the first magnet 211 and the second magnet 212 are respectively fixed on opposite sides of the magnetic frame 23, and the third magnet 213 and the fourth magnet 214 are respectively It is fixed to the other opposite sides of the magnetic frame 23.
  • the elastic member 3 suspends the vibrator 2 in the receiving space 10. That is, one end of the elastic member 3 is fixed to the vibrator 2, and one end is fixed to the housing 1, specifically, it is fixed to the upper cover 12 of the housing 1.
  • the elastic member 3 includes two, and the two elastic members 3 are respectively arranged on opposite sides of the vibrator 2 along the movement direction of the vibrator 2. The arrangement of the double elastic member structure can make the vibration effect of the linear vibration motor 100 more balanced and more reliable.
  • the coil assembly 4 is fixed to the housing 1.
  • the coil assembly 4 extends into the through hole 20 and is spaced apart from the magnetic circuit system 21.
  • the coil assembly 4 is wound on the outer side of the magnetic circuit system 21 and is arranged opposite to the magnetic circuit system 21.
  • the coil assembly 4 extends between the first magnetic steel 211 and the second magnetic steel 212 and is spaced apart from the first magnetic steel 211 and the second magnetic steel 212; at the same time, the coil
  • the component 4 extends between the third magnetic steel 213 and the fourth magnetic steel 214 and is spaced apart from the third magnetic steel 213 and the fourth magnetic steel 214 respectively.
  • the coil assembly 4 is used to drive the vibrator 2 to vibrate.
  • the coil assembly 4 includes a metal member 41 fixed to the housing 1 and a coil 42 wound around the metal member 41.
  • the metal member 41 includes an iron core 4111 and two magnetic shoes 412 respectively extending from the iron core 4111 at opposite ends of the vibrator 2 in the moving direction.
  • the coil 42 extends into the through hole 20 and is spaced apart from the magnetic circuit system 21 for driving the vibrator 2 to vibrate.
  • the coil 42 is wound around the iron core 4111, the magnetic shoe 412 is fixed to the housing 1, and the two magnetic shoes 412 are connected to the first magnet 211 and the second magnet 212, respectively. Set it right.
  • the first magnetic steel 211 and the second magnetic steel 212 are respectively arranged on opposite sides of the coil 42 along the movement direction of the vibrator 2.
  • the magnetic shoe 412 is fixed to the housing 1.
  • the coil assembly 4 is specifically fixedly installed on the bottom plate 11.
  • the iron core 411 forms a magnetic field and interacts with the magnetic fields of the first magnet 211 and the second magnet 212 to form electromagnetic attraction;
  • the three magnets 213 and the fourth magnet 214 form a Lorentz force.
  • the electromagnetic attraction and the Lorentz force jointly form a driving force, thereby driving the vibrator 2 to reciprocate linearly to produce a vibration effect.
  • the driving force is suction and is defined as F2, that is, it has a negative stiffness, and the negative stiffness is defined as K2.
  • the magnetic spring member 5 is fixed to the housing 1.
  • the magnetic spring member 5 and the vibrator 2 are spaced apart.
  • the magnetic spring member 5 is magnetic steel.
  • the magnetic spring member 5 is magnetized in a direction perpendicular to the movement direction of the vibrator 2.
  • the magnetic spring member 5 may also be a ring-shaped magnetic steel arranged on opposite sides of the coil assembly 4 along the moving direction of the vibrator 2.
  • the ring-shaped magnetic steel is arranged around the vibrator 2.
  • the magnetic force between the magnetic spring member 5 and the magnetic circuit system 21 provides a restoring force for the vibrator 2.
  • the magnetic spring member 5 includes a first magnetic spring member 51 and a second magnetic spring member 52 which are arranged on opposite sides of the coil assembly 4 along the movement direction of the vibrator 2.
  • the first magnetic spring member 51 and the second magnetic spring member 52 are respectively fixed to the bottom plate 11.
  • the first magnetic spring member 51 and the second magnetic spring member 52 are both magnetic steel and are magnetized in a direction perpendicular to the movement direction of the vibrator 2.
  • the magnetic pole of the magnetic spring member 5 facing the vibrator 2 is opposite to the magnetic pole of the opposite surface of the first magnetic steel 211 and the second magnetic steel 212.
  • the magnetic poles of the first magnetic spring member 51 and the second magnetic spring member 52 facing the vibrator 2 are opposite to the magnetic poles of the opposite faces of the first magnetic steel 211 and the second magnetic steel 212, and the first magnetic steel 211 and the second magnetic steel 212 are opposite to the magnetic poles.
  • the magnetic force between a magnetic spring element 51 and the second magnetic spring element 52 and the magnetic circuit system 21 respectively provide a restoring force to the vibrator 2.
  • the magnetic spring member 5 includes a third magnetic spring member 53 and a fourth magnetic spring member 54 arranged on opposite sides of the coil assembly 4 along the movement direction of the vibrator 2.
  • the third magnetic spring member 53 and the fourth magnetic spring member 54 are fixed to the upper cover 12.
  • the third magnetic spring member 53 and the first magnetic spring member 51 are respectively disposed on opposite sides of the vibrator 2
  • the fourth magnetic spring member 54 and the second magnetic spring member 52 are respectively disposed on opposite sides of the vibrator 2
  • the third magnetic spring member 53 and the fourth magnetic spring member 54 are both magnetic steel and are magnetized in the direction perpendicular to the movement direction of the vibrator 2.
  • the magnetic poles of the spring member 53 and the fourth magnetic spring member 54 facing the vibrator 2 are opposite to the magnetic poles of the opposite surfaces of the first magnetic steel 211 and the second magnetic steel 212.
  • the first magnetic spring member 51 and the second magnetic spring member 52 respectively face the magnetic pole S of the vibrator 2.
  • the magnetic poles N on the opposite sides of the first magnet 211 and the second magnet 212.
  • the first magnetic steel 211 is far away from the magnetic pole S on the side of the coil 42. This arrangement causes the first magnetic spring member 51 and the second magnetic spring member 52 to generate repulsive force F1 that repels the same magnetic pole with the first magnetic steel 211, respectively.
  • the third magnetic spring member 53 and the fourth magnetic spring member 54 respectively face the magnetic pole S of the vibrator 2.
  • the magnetic poles N on the opposite sides of the first magnet 211 and the second magnet 212.
  • the second magnetic steel 212 is away from the magnetic pole S on the side of the coil 42.
  • This arrangement makes the third magnetic spring member 53 and the fourth magnetic spring member 54 and the second magnetic steel 212 generate a repulsive force F1 that repels the same magnetic pole.
  • the arrangement of this structure can make the magnetic spring member 5 and the first magnetic steel 211 and the second magnetic steel 212 form a more balanced repulsive force, and the reliability is better.
  • the magnetic spring member 5 forms a repulsive force with the first magnetic steel 211 and the second magnetic steel 212, and the repulsive force defines F1, that is, it has a supporting rigidity, and the rigidity is defined as K1. Specifically, this setting causes the first magnet 211 and the second magnet 212 to generate a repulsive force F1 that repels the magnetic poles.
  • the support stiffness of the elastic member 3 to the vibrator 2 is defined as K3. Defining the total stiffness of the linear vibration motor 100 as K, then it satisfies:
  • K K1-K2+K3 (1).
  • the magnetic spring member 5 and the elastic member 3 jointly support the vibrator 2, which is also conducive to the stability of the linear vibration motor 100, thereby improving reliability.
  • the linear vibration motor of the present invention provides a first magnet and a second magnet that are magnetized along the direction of movement of the vibrator on the vibrator, wherein the first magnet and the second magnet are The magnetic poles of the opposite sides of the magnetic steel are the same; the magnetic spring member is fixed to the housing, wherein the magnetic spring member is a magnetic steel and is magnetized in a direction perpendicular to the movement direction of the vibrator.
  • the magnetic spring member includes The first magnetic spring member and the second magnetic spring member on opposite sides of the movement direction, the magnetic poles of the first magnetic spring member and the second magnetic spring member facing the vibrator are opposite to the magnetic poles of the opposite sides of the first magnetic steel and the second magnetic steel .
  • This structure enables the magnetic repulsion formed by the magnetic spring member and the magnetic circuit system, so that both the first magnetic steel and the second magnetic steel have positive rigidity to overcome the negative rigidity brought about by the iron core and the magnetic shoe in the related art, In turn, the rigidity requirement for the design of the elastic element is reduced, thereby improving the reliability.
  • the magnetic spring member and the elastic member jointly support the vibrator, which is also conducive to the stability of the linear vibration motor, thereby improving reliability.

Landscapes

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

Abstract

本实用新型提供一种线性振动电机，其包括具有收容空间的壳体、振子、弹性件、线圈组件及磁弹簧件，振子包括磁路系统，磁路系统包括第一磁钢和第二磁钢，第一磁钢和第二磁钢沿振子的运动方向充磁，第一磁钢和第二磁钢相对面的磁极相同；磁弹簧件为磁钢且沿垂直于振子的运动方向充磁，磁弹簧件包括设置于线圈组件振子的运动方向的相对两侧的第一磁弹簧件和第二磁弹簧件，第一磁弹簧件和第二磁弹簧件分别朝向振子的磁极与第一磁钢和第二磁钢相对面的磁极相反。与相关技术相比，本实用新型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收容空间的壳体、位于所述收容空间的振子、将所述振子固定并悬置于所述收容空间的弹性件和固定于所述壳体的线圈组件，通过线圈产生的磁场与振子产生的磁场相互作用，从而驱动所述振子做往复直线运动而产生振动。其中，所述线圈组件包括铁芯、由所述铁芯的相对两端延伸且固定于所述壳体的两个磁靴及绕设于所述铁芯的线圈；所述振子包括沿其运动方向平行设置且与所述线圈组件间隔的两个磁钢。
 技术问题
然而，相关技术的线性振动电机中，负钢度所述铁芯和所述磁靴对所述磁钢的磁吸力使得所述振子存在正刚度，为了克服正刚度，需要将所述弹性件刚度设计比较大，导致所述弹性件的应力比较大，容易在所述振子振动时造成所述弹性件损坏或者变形，使得产品可靠性降低。因此，为了解决因所述弹性件刚度增大引起的可靠性问题，在设计上变更所述弹性件，又导致对所述线性振动电机的性能带来其他缺陷，比如非运动方向位移增大、摇摆等。
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，本实用新型提供一种线性振动电机，其包括具有收容空间的壳体、设置于所述收容空间内的振子、将所述振子悬置于所述收容空间内的弹性件、以及固定于所述壳体的驱动所述振子运动的线圈组件和磁弹簧件；所述振子包括磁路系统，所述磁路系统包括分别设置于所述线圈组件沿所述振子的运动方向的相对两侧的第一磁钢和第二磁钢，所述第一磁钢和所述第二磁钢沿所述振子的运动方向充磁，且所述第一磁钢和所述第二磁钢相对面的磁极相同，所述磁弹簧件为磁钢且沿垂直于所述振子的运动方向充磁，所述磁弹簧件包括设置于所述线圈组件沿所述振子的运动方向的相对两侧的第一磁弹簧件和第二磁弹簧件，第一磁弹簧件和第二磁弹簧件朝向所述振子的磁极与所述第一磁钢和所述第二磁钢相对面的磁极相反。 
优选的，所述磁弹簧件为设置于所述线圈组件沿所述振子的运动方向的相对两侧的环形磁钢，所述环形磁钢环绕所述振子设置。
优选的，所述磁弹簧件还包括设置于所述线圈组件沿所述振子的运动方向的相对两侧的第三磁弹簧件和第四磁弹簧件，所述第三磁弹簧件和所述第一磁弹簧件分别设置于所述振子的相对两侧，所述第四磁弹簧件和所述第二磁弹簧件分别设置于所述振子的相对两侧，所述第三磁弹簧件和所述第四磁弹簧件均为磁钢且沿垂直于所述振子的运动方向充磁且所述第三磁弹簧件和所述第四磁弹簧件朝向所述振子的磁极与所述第一磁钢和所述第二磁钢相对面的磁极相反。
优选的，所述壳体包括底板和盖设于所述底板并与所述底板共同围成所述收容空间的上盖，所述第一磁弹簧件和所述第二磁弹簧件分别固定于所述底板，所述第三磁弹簧件和所述第四磁弹簧件固定于所述上盖。
优选的，所述磁路系统还包括分别设置于所述线圈组件沿垂直于所述振子的运动方向的相对两侧的第三磁钢和第四磁钢，所述第三磁钢和所述第四磁钢沿垂直于所述振子的运动方向充磁，所述第三磁钢和所述第四磁钢相对面的磁极相同且所述第三磁钢和所述第四磁钢相对面的磁极与所述第一磁钢和所述第二磁钢相对面的磁极相反。
优选的，所述振子还包括具有通孔的质量块和固定于所述通孔内壁且呈环状的磁框，所述第一磁钢和所述第二磁钢分别固定于所述磁框的相对两侧，所述第三磁钢和所述第四磁钢分别固定于所述磁框另外相对两侧，所述线圈组件延伸至所述通孔内并与所述磁路系统间隔设置。
优选的，所述线圈组件包括固定于所述壳体的金属构件和绕设于所述金属构件的线圈，所述金属构件包括铁芯和分别由所述铁芯沿所述振子的运动方向的相对两端延伸的两个磁靴，所述线圈绕设于所述铁芯，所述磁靴固定于所述壳体，两个所述磁靴分别与所述第一磁钢和所述第二磁钢正对设置。
优选的，所述弹性件包括两个，两个所述弹性件分别沿所述振子的运动方向分别设置于所述振子相对两侧。
 有益效果
与相关技术相比，本实用新型的线性振动电机通过在所述振子设置沿所述振子的运动方向充磁的第一磁钢和第二磁钢，其中，第一磁钢和所述第二磁钢相对面的磁极相同；将磁弹簧件固定于所述壳体，其中，磁弹簧件为磁钢且沿垂直于所述振子的运动方向充磁，磁弹簧件包括设置于线圈组件沿振子的运动方向的相对两侧的第一磁弹簧件和第二磁弹簧件，第一磁弹簧件和第二磁弹簧件朝向振子的磁极与第一磁钢和第二磁钢相对面的磁极相反。该结构使所述磁弹簧件与磁路系统形成的磁斥力，从而使第一磁钢和所述第二磁钢均具有正刚度来克服相关技术中铁芯和磁靴带来的负刚度，进而降低对弹性件设计的刚度要求，从而提高可靠性。另外，磁弹簧件和弹性件共同对在所述振子进行支承，也有利于所述线性振动电机的稳定性，从而提高可靠性。
 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为本实用新型线性振动电机的立体结构图；
图2为本实用新型线性振动电机的部分结构图；
图3为沿图1中A-A线的剖示图；
图4为本实用新型去除壳体的线性振动电机的部分结构装配图
图5为本实用新型线性振动电机的磁弹簧件、去除质量块的振子及线圈组件的部分立体结构装配图；
图6为沿图5中B-B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1-6，本实用新型提供一种线性振动电机100，所述线性振动电机100包括具有收容空间10的壳体1、振子2、弹性件3、线圈组件4以及磁弹簧件5。
所述壳体1具有收容空间10。具体的，所述壳体1包括底板11和盖设于所述底板11并与所述底板11共同围成所述收容空间10的上盖12。
所述振子2设置于所述收容空间10。所述振子2通过所述弹性件3支撑悬置于所述收容空间10内。具体的，所述振子2包括磁路系统21、质量块22及磁框23。
所述磁路系统21包括第一磁钢211、第二磁钢212、第三磁钢213及第四磁钢214。
所述第一磁钢211和所述第二磁钢212分别设置于所述线圈组件4沿所述振子2的运动方向的相对两侧。在本实施方式中，所述第一磁钢211和所述第二磁钢212分别固定于两个所述第二侧壁232。其中，所述第一磁钢211和所述第二磁钢212沿所述振子2的运动方向充磁，且所述第一磁钢211和所述第二磁钢212相对面的磁极相同。所述第一磁钢211和所述第二磁钢212分别与所述线圈组件4通电时形成电磁吸力以驱动所述线性振动电机100。
所述第三磁钢213和所述第四磁钢214分别设置于所述线圈组件4沿垂直于所述振子2的运动方向的相对两侧。在本实施方式中，所述第三磁钢213和所述第四磁钢214分别固定于两个所述第一侧壁231。所述第三磁钢213和所述第四磁钢214沿垂直于所述振子2的运动方向充磁，且所述第三磁钢213和所述第四磁钢214相对面的磁极相同且所述第三磁钢213和所述第四磁钢214相对面的磁极与所述第一磁钢211和所述第二磁钢212相对面的磁极相反。所述第三磁钢213和所述第四磁钢214分别与所述线圈组件4通电时形成洛伦兹力以驱动所述线性振动电机100。
所述质量块22用于增加所述振子2的重量以保证振动的力度。所述质量块22具有通孔20。
所述磁框23呈环状。所述磁框23嵌设于所述质量块21内。具体的，所述磁框23固定于所述通孔20内壁。在本实施方式中，所述磁框23包括平行于所述振子2的运动方向设置且相对间隔的两个第一侧壁231和垂直于所述运动方向且相对间隔设置的两个第二侧壁232。两个所述第一侧壁231和两个所述第二侧壁232均固定于所述通孔20内壁。在本实施方式中，所述第一磁钢211和所述第二磁钢212分别固定于所述磁框23的相对两侧，所述第三磁钢213和所述第四磁钢214分别固定于所述磁框23另外相对两侧。
所述弹性件3将所述振子2悬置于所述收容空间10。即所述弹性件3一端固定于所述振子2，一端固定于所述壳体1，具体为固定于所述壳体1的上盖12。本实施方式中，所述弹性件3包括两个，两个所述弹性件3分别沿所述振子2的运动方向分别设置于所述振子2相对两侧。双弹性件结构的设置可使所述线性振动电机100的振动效果更平衡，可靠性更好。
所述线圈组件4固定于所述壳体1。所述线圈组件4延伸至所述通孔20内并与所述磁路系统21间隔设置。具体的，所述线圈组件4绕置于所述磁路系统21的外侧并与所述磁路系统21相对间隔设置。所述线圈组件4延伸至所述第一磁钢211和所述第二磁钢212之间且分别与所述第一磁钢211和所述第二磁钢212间隔设置；同时，所述线圈组件4延伸至所述第三磁钢213和所述第四磁钢214之间且分别与所述第三磁钢213和所述第四磁钢214间隔设置。所述线圈组件4用于驱动所述振子2振动。具体的，所述线圈组件4包括固定于所述壳体1的金属构件41和绕设于所述金属构件41的线圈42。
所述金属构件41包括铁芯4111和分别由所述铁芯4111沿所述振子2的运动方向的相对两端延伸的两个磁靴412。
所述线圈42延伸至所述通孔20内并与所述磁路系统21间隔设置用于驱动所述振子2振动。所述线圈42绕设于所述铁芯4111，所述磁靴412固定于所述壳体1，两个所述磁靴412分别与所述第一磁钢211和所述第二磁钢212正对设置。也就是说，所述第一磁钢211和所述第二磁钢212分别沿所述振子2的运动方向设置于所述线圈42的相对两侧。所述磁靴412固定于所述壳体1。本实施方式中，所述线圈组件4具体固定安装于所述底板11。所述线圈42通电后，所述铁芯411形成磁场并分别与所述第一磁钢211和所述第二磁钢212的磁场相互作用形成电磁吸力；而所述线圈42分别与所述第三磁钢213和所述第四磁钢214形成洛伦兹力。电磁吸力和洛伦兹力共同形成驱动力，从而驱动所述振子2往复直线运动，产生振动效果。其中，该驱动力为吸力且定义为F2，即具有负刚度，定义该负刚度为K2。
所述磁弹簧件5固定于所述壳体1。所述磁弹簧件5与所述振子2间隔设置。
本实施方式中，所述磁弹簧件5为磁钢。所述磁弹簧件5沿垂直于所述振子2的运动方向充磁。当然，不限于此，所述磁弹簧件5还可以为设置于所述线圈组件4沿所述振子2的运动方向的相对两侧的环形磁钢。所述环形磁钢环绕所述振子2设置。
所述磁弹簧件5与所述磁路系统21之间的磁作用力为所述振子2提供回复力。
所述磁弹簧件5包括设置于所述线圈组件4沿所述振子2的运动方向的相对两侧的第一磁弹簧件51和第二磁弹簧件52。在本实施方式中，所述第一磁弹簧件51和所述二磁弹簧件52第分别固定于所述底板11。其中，所述第一磁弹簧件51和所述第二磁弹簧件52均为磁钢且沿垂直于所述振子2的运动方向充磁。所述磁弹簧件5朝向所述振子2的磁极与所述第一磁钢211和所述第二磁钢212相对面的磁极相反。所述第一磁弹簧件51和所述第二磁弹簧件52分别朝向所述振子2的磁极与所述第一磁钢211和所述第二磁钢212相对面的磁极相反，所述第一磁弹簧件51和所述第二磁弹簧件52分别与所述磁路系统21之间的磁作用力均为所述振子2提供回复力。
在本实施方式中，为了更好更平衡地使所述磁弹簧件5与所述磁路系统21之间的磁作用力均为所述振子2提供回复力。所述磁弹簧件5包括设置于所述线圈组件4沿所述振子2的运动方向的相对两侧的第三磁弹簧件53和第四磁弹簧件54。所述第三磁弹簧件53和所述第四磁弹簧件54固定于所述上盖12。其中，所述第三磁弹簧件53和所述第一磁弹簧件51分别设置于所述振子2的相对两侧，所述第四磁弹簧件54和所述第二磁弹簧件52分别设置于所述振子2的相对两侧，所述第三磁弹簧件53和所述第四磁弹簧件54均为磁钢且沿垂直于所述振子2的运动方向充磁，所述第三磁弹簧件53和所述第四磁弹簧件54朝向所述振子2的磁极与所述第一磁钢211和所述第二磁钢212相对面的磁极相反。
在本实施方式中，如图6所示，所述第一磁弹簧件51和所述第二磁弹簧件52分别朝向所述振子2的磁极为S。所述第一磁钢211和所述第二磁钢212相对面的磁极为N。所述第一磁钢211远离所述线圈42一侧的磁极为S。该设置使所述第一磁弹簧件51和所述第二磁弹簧件52分别与所述第一磁钢211的产生同磁极相斥的斥力F1。
所述第三磁弹簧件53和所述第四磁弹簧件54分别朝向所述振子2的磁极为S。所述第一磁钢211和所述第二磁钢212相对面的磁极为N。所述第二磁钢212远离所述线圈42一侧的磁极为S。该设置使所述第三磁弹簧件53和所述第四磁弹簧件54与所述第二磁钢212的产生同磁极相斥的斥力F1。该结构的设置可使所述磁弹簧件5与所述第一磁钢211和所述第二磁钢212形成斥力的更平衡，可靠性更好。
也就是说，所述磁弹簧件5与所述第一磁钢211和所述第二磁钢212形成斥力，该斥力定义F1，即具有支承刚度，定义该刚度为K1。具体的，该设置使所述第一磁钢211和所述第二磁钢212的产生同磁极相斥的斥力F1。
定义所述弹性件3对所述振子2的支承刚度为K3。定义所述线性振动电机100的总刚度为K，则满足：
K=K1-K2+K3                                       （1）。
得出K3=K+ K2- K1                                 （2）。
从公式（2）可知对于一个确定的总刚度K，显然因为所述磁弹簧件5的支承刚度K1的存在，降低了所述弹性件3的支承刚度K3，进而使所述弹性件3应力降低，提高了所述弹性件3的可靠性，从而使所述线性振动电机100的可靠性增加。
综合上述，所述磁弹簧件5和所述弹性件3共同对在所述振子2进行支承，也有利于所述线性振动电机100的稳定性，从而提高可靠性。
与相关技术相比，本实用新型的线性振动电机通过在所述振子设置沿所述振子的运动方向充磁的第一磁钢和第二磁钢，其中，第一磁钢和所述第二磁钢相对面的磁极相同；将磁弹簧件固定于所述壳体，其中，磁弹簧件为磁钢且沿垂直于所述振子的运动方向充磁，磁弹簧件包括设置于线圈组件沿振子的运动方向的相对两侧的第一磁弹簧件和第二磁弹簧件，第一磁弹簧件和第二磁弹簧件朝向振子的磁极与第一磁钢和第二磁钢相对面的磁极相反。该结构使所述磁弹簧件与磁路系统形成的磁斥力，从而使第一磁钢和所述第二磁钢均具有正刚度来克服相关技术中铁芯和磁靴带来的负刚度，进而降低对弹性件设计的刚度要求，从而提高可靠性。另外，磁弹簧件和弹性件共同对在所述振子进行支承，也有利于所述线性振动电机的稳定性，从而提高可靠性。
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 (8)

  1. 一种线性振动电机，其包括具有收容空间的壳体、设置于所述收容空间内的振子、将所述振子悬置于所述收容空间内的弹性件以及固定于所述壳体的驱动所述振子运动的线圈组件；所述振子包括磁路系统，所述磁路系统包括分别设置于所述线圈组件沿所述振子的运动方向的相对两侧的第一磁钢和第二磁钢，所述第一磁钢和所述第二磁钢沿所述振子的运动方向充磁，且所述第一磁钢和所述第二磁钢相对面的磁极相同，其特征在于，所述线性振动电机还包括固定于所述壳体的磁弹簧件，所述磁弹簧件为磁钢且沿垂直于所述振子的运动方向充磁，所述磁弹簧件包括设置于所述线圈组件沿所述振子的运动方向的相对两侧的第一磁弹簧件和第二磁弹簧件，所述第一磁弹簧件和所述第二磁弹簧件朝向所述振子的磁极与所述第一磁钢和所述第二磁钢相对面的磁极相反。 
  2. 根据权利要求1所述的线性振动电机，其特征在于，所述磁弹簧件为设置于所述线圈组件沿所述振子的运动方向的相对两侧的环形磁钢，所述环形磁钢环绕所述振子设置。
  3. 根据权利要求1所述的线性振动电机，其特征在于，所述磁弹簧件还包括设置于所述线圈组件沿所述振子的运动方向的相对两侧的第三磁弹簧件和第四磁弹簧件，所述第三磁弹簧件和所述第一磁弹簧件分别设置于所述振子的相对两侧，所述第四磁弹簧件和所述第二磁弹簧件分别设置于所述振子的相对两侧，所述第三磁弹簧件和所述第四磁弹簧件沿垂直于所述振子的运动方向充磁且所述第三磁弹簧件和所述第四磁弹簧件朝向所述振子的磁极与所述第一磁钢和所述第二磁钢相对面的磁极相反。
  4. 根据权利要求3所述的线性振动电机，其特征在于，所述壳体包括底板和盖设于所述底板并与所述底板共同围成所述收容空间的上盖，所述第一磁弹簧件和所述第二磁弹簧件分别固定于所述底板，所述第三磁弹簧件和所述第四磁弹簧件固定于所述上盖。
  5. 根据权利要求1所述的线性振动电机，其特征在于，所述磁路系统还包括分别设置于所述线圈组件沿垂直于所述振子的运动方向的相对两侧的第三磁钢和第四磁钢，所述第三磁钢和所述第四磁钢沿垂直于所述振子的运动方向充磁，所述第三磁钢和所述第四磁钢相对面的磁极相同且所述第三磁钢和所述第四磁钢相对面的磁极与所述第一磁钢和所述第二磁钢相对面的磁极相反。
  6. 根据权利要求5所述的线性振动电机，其特征在于，所述振子还包括具有通孔的质量块和固定于所述通孔内壁且呈环状的磁框，所述第一磁钢和所述第二磁钢分别固定于所述磁框的相对两侧，所述第三磁钢和所述第四磁钢分别固定于所述磁框另外相对两侧，所述线圈组件延伸至所述通孔内并与所述磁路系统间隔设置。
  7. 根据权利要求1所述的线性振动电机，其特征在于，所述线圈组件包括固定于所述壳体的金属构件和绕设于所述金属构件的线圈，所述金属构件包括铁芯和分别由所述铁芯沿所述振子的运动方向的相对两端延伸的两个磁靴，所述线圈绕设于所述铁芯，所述磁靴固定于所述壳体，两个所述磁靴分别与所述第一磁钢和所述第二磁钢正对设置。
  8. 根据权利要求1所述的线性振动电机，其特征在于，所述弹性件包括两个，两个所述弹性件分别沿所述振子的运动方向分别设置于所述振子相对两侧。
PCT/CN2019/125419 2019-12-14 2019-12-14 线性振动电机 WO2021114307A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2019/125419 WO2021114307A1 (zh) 2019-12-14 2019-12-14 线性振动电机

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2019/125419 WO2021114307A1 (zh) 2019-12-14 2019-12-14 线性振动电机

Publications (1)

Publication Number Publication Date
WO2021114307A1 true WO2021114307A1 (zh) 2021-06-17

Family

ID=76328819

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/125419 WO2021114307A1 (zh) 2019-12-14 2019-12-14 线性振动电机

Country Status (1)

Country Link
WO (1) WO2021114307A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113872409A (zh) * 2021-10-18 2021-12-31 浙江省东阳市东磁诚基电子有限公司 一种弹片非焊接式振动电机及其实现方法
US11404948B2 (en) * 2020-09-28 2022-08-02 Topray Mems Inc. Linear vibration motor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100793682B1 (ko) * 2007-01-16 2008-01-10 김정훈 초소형 선형 진동장치
CN209088783U (zh) * 2019-06-03 2019-07-09 瑞声光电科技(常州)有限公司 线性振动电机
CN110089014A (zh) * 2017-01-13 2019-08-02 三美电机株式会社 振动促动器、可佩戴式终端以及来电通知功能设备
CN110445343A (zh) * 2019-07-17 2019-11-12 瑞声科技（南京）有限公司 线性振动马达

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100793682B1 (ko) * 2007-01-16 2008-01-10 김정훈 초소형 선형 진동장치
CN110089014A (zh) * 2017-01-13 2019-08-02 三美电机株式会社 振动促动器、可佩戴式终端以及来电通知功能设备
CN209088783U (zh) * 2019-06-03 2019-07-09 瑞声光电科技(常州)有限公司 线性振动电机
CN110445343A (zh) * 2019-07-17 2019-11-12 瑞声科技（南京）有限公司 线性振动马达

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11404948B2 (en) * 2020-09-28 2022-08-02 Topray Mems Inc. Linear vibration motor
CN113872409A (zh) * 2021-10-18 2021-12-31 浙江省东阳市东磁诚基电子有限公司 一种弹片非焊接式振动电机及其实现方法

Similar Documents

Publication Publication Date Title
US10079531B2 (en) Linear vibration motor
US11211857B2 (en) Linear vibration motor having accommodation spaces provided for magnets in a support member
JP6814257B2 (ja) リニア振動モータ
JP6429100B1 (ja) リニア振動モータ
US11245320B2 (en) Linear vibration motor
WO2020140536A1 (zh) 线性振动电机
WO2021000088A1 (zh) 振动电机
WO2020140535A1 (zh) 线性振动电机
US11316419B2 (en) Linear vibration motor
US11462986B2 (en) Linear vibration motor with magnets fixed to a base and coils fixed to a weight
WO2020134379A1 (zh) 线性振动电机
WO2021114307A1 (zh) 线性振动电机
WO2021000122A1 (zh) 电磁激励器
WO2020140534A1 (zh) 线性振动电机
WO2021237786A1 (zh) 线性振动电机
JP6655214B2 (ja) 振動モータ
WO2018171060A1 (zh) 线性振动马达
WO2021174560A1 (zh) 线性马达
CN114421730B (zh) 一种线性振动马达
WO2021000087A1 (zh) 振动电机
CN206060495U (zh) 振动电机
CN211321179U (zh) 线性振动电机
US11309781B2 (en) Linear vibration motor
JP2020019007A (ja) リニア振動モータ
JP2020019005A (ja) リニア振動モータ

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19955513

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19955513

Country of ref document: EP

Kind code of ref document: A1