WO2022000642A1 - Linear vibration motor - Google Patents

Linear vibration motor Download PDF

Info

Publication number
WO2022000642A1
WO2022000642A1 PCT/CN2020/104503 CN2020104503W WO2022000642A1 WO 2022000642 A1 WO2022000642 A1 WO 2022000642A1 CN 2020104503 W CN2020104503 W CN 2020104503W WO 2022000642 A1 WO2022000642 A1 WO 2022000642A1
Authority
WO
WIPO (PCT)
Prior art keywords
coil assembly
magnetic
vibration motor
hole
hole wall
Prior art date
Application number
PCT/CN2020/104503
Other languages
French (fr)
Chinese (zh)
Inventor
陶峰
凌芳华
浦晓峰
Original Assignee
瑞声声学科技(深圳)有限公司
瑞声光电科技(常州)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, 瑞声光电科技(常州)有限公司 filed Critical 瑞声声学科技(深圳)有限公司
Publication of WO2022000642A1 publication Critical patent/WO2022000642A1/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/34—Reciprocating, oscillating or vibrating parts of the magnetic circuit
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • 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

Definitions

  • the present invention relates to the field of vibration motors, in particular to a linear vibration motor used in portable consumer electronic products.
  • a linear vibration motor includes a casing, a coil assembly housed in the casing, a vibration unit, and an elastic support for supporting the vibration unit.
  • the vibration unit includes a mass block with a receiving hole and a magnet fixed on the hole wall of the receiving hole.
  • Circuit structure, the coil assembly interacts with the magnetic circuit structure to drive the vibration unit to vibrate along the length direction of the housing, the magnetic circuit structure includes a pole core fixed on the hole wall, and a magnetic steel fixed on the side of the pole core facing the coil assembly, wherein the pole core is The core is flat.
  • such a linear vibration motor cannot fully utilize the magnetic properties of the magnetic steel, and the assembly precision of the pole core and the magnetic steel is low.
  • the purpose of the present invention is to provide a linear vibration motor, which can enhance the magnetic flux in the magnetic gap, reduce the difficulty of assembling parts and improve the accuracy of assembly, and reduce the risk of breakage when the mass block is dropped.
  • the linear vibration motor provided by the present invention includes a casing, a coil assembly accommodated in the casing, a vibration unit and an elastic support for supporting the vibration unit, the casing has a bottom plate for fixing the coil assembly, and the vibration unit It includes a mass block with a receiving hole and a magnetic circuit structure fixed in the receiving hole and formed with a magnetic gap at intervals.
  • the coil assembly is located in the magnetic gap and interacts with the magnetic circuit structure to drive the vibration.
  • the mass block includes a hole wall surrounding the receiving hole and an outer surface opposite to the hole wall
  • the magnetic circuit structure includes a wall attached to the hole
  • the pole core of the wall and the magnetic steel attached to the pole core and opposite to the coil assembly, the mass block further comprises a groove formed by concave from the hole wall to the outer surface, the pole core It includes a flat part that is flat on the side of the magnetic steel away from the coil assembly, and a bending part that is bent and extended to the coil assembly from opposite ends of the flat part close to the hole wall, respectively. The part and the bending part are completely accommodated in the groove.
  • the groove includes a bottom wall parallel to the outer surface and a side wall connecting the bottom wall and the hole wall, the flat portion is flat against the bottom wall, and the bent portion It is flat on the side wall and does not extend beyond the groove.
  • the pole core further includes an extension portion bent and extended from the bending portion along the hole wall, and the extension portion is flatly attached to the hole wall.
  • the bent portion is perpendicular to the flat portion and the extension portion.
  • the hole walls include a pair of first hole walls spaced along the short axis side of the mass block and a pair of second hole walls spaced along the long axis side of the mass block, a pair of the The first hole walls are respectively recessed with the grooves, the pole cores are respectively accommodated in a pair of the grooves, and the long axis edge of the mass block extends along the vibration direction.
  • the pole core is stamped and formed by a magnetic conductive plate.
  • the coil assembly includes a core body and a coil wound around the outer periphery of the core body, and the axis of the coil extends along the vibration direction.
  • the core body includes a main body and fixed ends fixed on both ends of the main body, the coil is wound on the main body, and the fixed ends are fixed on the bottom plate.
  • the core body is an iron core.
  • the pole core by arranging the pole core to include a flat portion that is flat on the side of the magnetic steel far away from the coil assembly, and approaching the hole wall from the flat portion
  • the opposite ends of the pole core are respectively bent and extended to the coil assembly, that is, the pole core can be bent at the flat part near the bent part and the magnetic induction intensity of the bent part can be made by the pole core bending process. increase (that is, the magnetic flux in the magnetic gap can be enhanced by the pole core bending process), so that the transient vibration performance can be improved (the greater the magnetic flux, the shorter the starting and braking time of the vibration unit).
  • the groove on the hole wall to match the pole core, it can not only reduce the assembly difficulty of the components (pole core and magnetic steel) and improve the assembly accuracy under the condition of ensuring the performance of the magnetic circuit, Moreover, without sacrificing the volume of the receiving hole, the wall thickness of the mass block can be widened and the weight of the mass block can be increased, thereby reducing the risk of fracture when the mass block is dropped.
  • FIG. 1 is a perspective exploded schematic diagram of Embodiment 1 of the linear vibration motor provided by the present invention.
  • FIG. 2 is a partially exploded schematic view of the linear vibration motor shown in FIG. 1 .
  • FIG. 3 is a perspective view of the linear vibration motor shown in FIG. 1 after being assembled.
  • FIG. 4 is a cross-sectional view of the linear vibration motor shown in FIG. 3 taken along line A-A.
  • FIG. 5 is a schematic structural diagram of a mass block in the linear vibration motor shown in FIG. 4 .
  • FIG. 6 is a cross-sectional view of the linear vibration motor shown in FIG. 3 taken along line B-B.
  • FIG. 7 is a schematic structural diagram of Embodiment 2 of the linear vibration motor provided by the present invention.
  • the linear vibration motor 100 includes a housing 1 , a coil assembly 2 accommodated in the housing 1 , a vibration unit 3 , and an elastic support 4 supporting the vibration unit 3 .
  • the casing 1 includes a casing 11 and a bottom plate 13 assembled with the casing 11 to form a receiving space 1B, and the coil assembly 2 is fixed on the bottom plate 13 .
  • the coil assembly 2 includes a core body 21 and a coil 23 wound around the outer circumference of the core body 21 , wherein the axis direction of the coil 23 is the vibration direction of the vibration unit 3 , and the vibration direction is related to the base plate. 13 parallel.
  • the core body 21 may be in the shape of a column or an "I" shape.
  • the core body 21 is “I”-shaped, and includes a main body portion 211 and fixed ends 213 fixed on both ends of the main body portion 211 , and the coil 23 is wound around the main body portion. 211 , the coil assembly 2 is fixed on the base plate 13 through the fixed end 213 .
  • the core body 21 is an iron core. After the coil 23 is energized, the core 21 is magnetized by the magnetic field of the coil 23, the magnetized core 21 becomes a magnet, and the magnetic field of the magnet and the magnetic field of the coil 23 are superimposed on each other, so that the The magnetic force of the coil assembly 2 increases.
  • the coil 23 is electrically connected to an external power source through the circuit board 5 .
  • the circuit board 5 is fixed on the bottom plate 13 , and one end of the circuit board 5 extends out of the receiving space 1B to be electrically connected to an external circuit.
  • the vibration unit 3 includes a mass block 31 with a receiving hole 3A and a magnetic circuit structure 33 fixed in the receiving hole 3A and formed with a magnetic gap 3B at intervals.
  • the magnetic circuit structures 33 interact to drive the vibration unit 3 to vibrate along the vibration direction.
  • the mass block 31 includes a hole wall 35 surrounding the receiving hole 3A, an outer surface 37 opposite to the hole wall 35 , and a groove 39 recessed from the hole wall 35 to the outer surface 37 .
  • the magnetic circuit structure 33 includes a pole core 331 attached to the hole wall 35 and a magnetic steel 333 attached to the pole core 331 and opposite to the coil assembly 2 .
  • the pole core 331 includes a flat portion 335 that is flat on the side of the magnetic steel 333 away from the coil assembly 2 .
  • the bent portion 337 bent and extended and the extension portion 339 bent and extended from the bent portion 337 along the hole wall 35 , the flat portion 335 and the bent portion 337 are completely accommodated in the groove within 39. As shown in FIG. 4 , the bent portion 337 is perpendicular to the flat portion 335 and the extension portion 339 .
  • the groove 39 includes a bottom wall 391 parallel to the outer surface 37 and a side wall 393 connecting the bottom wall 391 and the hole wall 35.
  • the flat portion 335 is flat on the bottom wall 391,
  • the bent portion 337 is flat against the side wall 393 and does not extend beyond the groove 39 .
  • the hole wall 35 includes a pair of first hole walls 351 spaced along the short axis of the mass block 31 and a pair of second hole walls 353 spaced along the long axis of the mass block 31 .
  • the first hole walls 351 are respectively recessed with the grooves 39 , and the pole cores 331 are respectively accommodated in a pair of the grooves 39 , wherein the long axis of the mass block 31 is along the vibration direction extend.
  • the magnetic circuit structure 33 includes two of the pole cores 331 and two of the magnetic steels 333 , and two sets of magnetic units are formed with one of the pole cores 331 and one of the magnetic steels 333 as a group. They are arranged at intervals along the short axis side of the mass block 31 .
  • the polarity direction of the magnetic steel 333 is arranged along the short axis of the mass block 31, and the polar directions of the two magnetic steels 333 are opposite.
  • the side of the magnetic steel 333 close to the flat portion 335 is the S pole
  • the side close to the coil assembly 2 is the N pole.
  • the magnetic circuit structure 33 further includes an auxiliary pole core 33A fixed on the second hole wall 353 and an auxiliary magnetic steel fixed on the side of the auxiliary pole core 33A facing the coil assembly 2 . 33B.
  • the two auxiliary magnetic steels 33B are arranged opposite to each other with the same pole, so that when the coil 23 is energized, the coil assembly 2 and the magnetic steel 333 and the auxiliary magnetic steel of the magnetic circuit structure 33 can be made
  • the 33B interacts to achieve the fast response of the vibration motor.
  • the auxiliary pole core 33A is in the shape of a flat plate; the side of the auxiliary magnetic steel 33B close to the auxiliary pole core 33A is the N pole, and the side close to the coil assembly 2 for the S pole.
  • the second hole wall 353 can also be recessed to form the groove, and the auxiliary pole core 33A can also be set to the shape of the pole core 331;
  • the second hole wall 353 is recessed to form the groove, the auxiliary pole core 33A is arranged in the shape of the pole core 331 as shown in FIG. 4 (that is, the auxiliary pole core 33A has a bend), and the first hole
  • the grooves are not provided on the wall 351, and correspondingly, the pole core is provided in a flat plate shape.
  • the pole core 331 is stamped and formed by a magnetic conductive plate.
  • the elastic support members 4 are respectively provided on opposite sides of the vibration unit 3 along the vibration direction.
  • the elastic supports 4 are U-shaped springs, and the opening directions of the two elastic supports 4 are opposite to each other.
  • the elastic support member 4 includes a first fixing portion 41 connected with the mass block 31 , a second fixing portion 43 connected with the housing 1 , and connecting the first fixing portion 41 and the second fixing portion 43 .
  • the deformation portion 45 of the second fixing portion 43 and the first fixing portion 41 are arranged at intervals along the short axis side of the mass block 31 .
  • a buffer sheet 6 is provided between the first fixing portion 41 and the housing 1 and between the second fixing portion 43 and the mass 31 .
  • the buffer sheet 6 can be made of foam, rubber, silicon or the like. The buffer sheet 6 can prevent the elastic support 4 from colliding with the housing 1 and the mass 31 during the vibration of the vibration unit 3, thereby improving the reliability of the product.
  • FIG. 7 is a schematic structural diagram of the linear vibration motor 200 in the second embodiment.
  • the second embodiment is basically the same as the first embodiment, and the meanings of the symbols in the following list are also the same as those in the first embodiment. Therefore, the same parts will not be repeated here, and the following only List the differences.
  • the pole core 331 only includes a flat portion 335 that is flat on the side of the magnetic steel 333 away from the coil assembly 2 , and opposite ends of the flat portion 335 that are close to the hole wall 35 .
  • the bent portions 337 that are respectively bent and extended toward the coil assembly 2 do not include the extension portion.
  • buffer blocks 7 are further provided on opposite sides of the mass block 31 along the vibration direction.
  • the pole core in the first embodiment and the second embodiment both form bending parts 337 by bending and extending from opposite ends of the flat part 335 respectively. , so as to achieve the purpose of increasing the magnetic flux in the magnetic gap 3B.
  • the size of the magnetic flux mainly affects the transient performance of the linear vibration motor. The larger the magnetic flux, the shorter the starting and braking time of the linear vibration motor.
  • the pole core of the first embodiment is further bent and extended from the bending part 337 to form an extension part 339 , and the arrangement of the extension part 339 can further improve the magnetic flux in the magnetic gap 3B , therefore, relative to the linear vibration motor of the second embodiment, the linear vibration motor of the first embodiment has a shorter starting and braking time; on the other hand, relative to the vibration unit of the first embodiment (the vibration unit includes a pole core),
  • the acceleration root mean square value (Grms) of the vibration unit (the vibration unit includes the pole core) is larger, and the acceleration root mean square value (Grms) mainly affects the steady-state performance of the linear vibration motor.
  • the acceleration root mean square value (Grms) The larger the value of , the stronger the vibration sense of the linear vibration motor. Therefore, compared with the linear vibration motor of the first embodiment, the vibration sense of the linear vibration motor of the second embodiment is stronger.
  • the pole core 331 is arranged to include a flat portion 335 that is flat on the side of the magnetic steel 333 away from the coil assembly 2 , and is close to the hole wall 35 from the flat portion 335 .
  • the opposite ends of the coil assembly 2 are respectively bent and extended toward the bending portion 337 of the coil assembly 2, that is, the pole core 331 can be bent at the flat portion 335 near the bending portion 337 and the
  • the magnetic induction intensity of the bent portion 337 is increased (that is, the magnetic flux in the magnetic gap 3B can be enhanced by the bending of the pole core 331 ), so that the transient vibration performance can be improved (the greater the magnetic flux, the shorter the starting and braking time of the vibration unit). ).
  • the groove 39 on the hole wall 35 to fit the pole core 331 , not only can the performance of the magnetic circuit be ensured, the assembly difficulty of the components (pole core and magnetic steel) can be reduced and improved. Assembly accuracy, and without sacrificing the volume of the receiving hole, the wall thickness of the mass block 31 can be widened and the weight of the mass block 31 can be increased, thereby reducing the risk of fracture when the mass block 31 is dropped.

Landscapes

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

Abstract

A linear vibration motor (100), comprising a housing (1), a coil assembly (2), a vibration unit (3) and an elastic supporting member (4). The housing (1) is provided with a bottom plate (13) for fixing the coil assembly (2); the vibration unit (3) comprises a mass block (31) having an accommodating hole (3A) and a magnetic circuit structure (33) fixed to the accommodating hole (3A) and formed with a magnetic gap (3B); the coil assembly (2) is located in the magnetic gap (3B); the mass block (31) comprises a hole wall (35) surrounding the accommodating hole (3A) and an outer surface (37) opposite to the hole wall (35); the magnetic circuit structure (33) comprises a pole core (331) and magnetic steel (333); the mass block (31) further comprises a recess (39) formed by recessing from the hole wall (35) to the outer surface (37); the pole core (331) comprises a flat part (335) flatly attached to the side of the magnetic steel (333) away from the coil assembly (2), and bent parts (337) which are respectively bent and extended towards the coil assembly (2) from the two opposite ends, close to the hole wall (35), of the flat part (335); and the flat part (335) and the bent parts (337) are completely accommodated in the recess (39). The linear vibration motor (100) provided in the technical solution can enhance the magnetic flux in the magnetic gap (3B), reduce the difficulty in assembling parts, improve the assembly precision and reduce the risk of fracture when the mass block (31) falls.

Description

线性振动电机Linear Vibration Motor 技术领域technical field
本发明涉及振动电机领域，尤其涉及一种用于便携式消费性电子产品上的线性振动电机。The present invention relates to the field of vibration motors, in particular to a linear vibration motor used in portable consumer electronic products.
背景技术Background technique
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欢迎，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电机来做***反馈，比如手机的来电提示、信息提示、导航提示、游戏机的振动反馈等。With the development of electronic technology, portable consumer electronic products are more and more popular, such as mobile phones, handheld game consoles, navigation devices or handheld multimedia entertainment equipment, etc. These electronic products generally use vibration motors for system feedback, Such as mobile phone call prompts, information prompts, navigation prompts, and vibration feedback from game consoles.
相关技术中，线性振动电机包括外壳以及收容于外壳内的线圈组件、振动单元及支撑振动单元的弹性支撑件，振动单元包括具有收容孔的质量块及固设于收容孔的孔壁上的磁路结构，线圈组件与磁路结构相互作用以驱动振动单元沿外壳的长度方向振动，磁路结构包括固定于孔壁的极芯、固定于极芯朝向线圈组件一侧的磁钢，其中，极芯呈平板状。然而，此种线性振动电机不能充分利用磁钢的磁性能，而且极芯和磁钢的装配精度低。In the related art, a linear vibration motor includes a casing, a coil assembly housed in the casing, a vibration unit, and an elastic support for supporting the vibration unit. The vibration unit includes a mass block with a receiving hole and a magnet fixed on the hole wall of the receiving hole. Circuit structure, the coil assembly interacts with the magnetic circuit structure to drive the vibration unit to vibrate along the length direction of the housing, the magnetic circuit structure includes a pole core fixed on the hole wall, and a magnetic steel fixed on the side of the pole core facing the coil assembly, wherein the pole core is The core is flat. However, such a linear vibration motor cannot fully utilize the magnetic properties of the magnetic steel, and the assembly precision of the pole core and the magnetic steel is low.
因此，实有必要提供一种新的线性振动电机解决上述问题。Therefore, it is necessary to provide a new linear vibration motor to solve the above problems.
技术问题technical problem
本发明的目的在于提供一种线性振动电机，该线性振动电机可以增强磁间隙内的磁通量、降低零部件装配难度及提升装配精度以及降低质量块跌落时出现断裂的风险。The purpose of the present invention is to provide a linear vibration motor, which can enhance the magnetic flux in the magnetic gap, reduce the difficulty of assembling parts and improve the accuracy of assembly, and reduce the risk of breakage when the mass block is dropped.
技术解决方案technical solutions
本发明提供的线性振动电机，包括外壳以及收容于所述外壳内的线圈组件、振动单元及支撑所述振动单元的弹性支撑件，所述外壳具有固定所述线圈组件的底板，所述振动单元包括具有收容孔的质量块及固定于所述收容孔并且间隔设置形成有磁间隙的磁路结构，所述线圈组件位于所述磁间隙内并与所述磁路结构相互作用以驱动所述振动单元沿平行于所述底板的振动方向振动，所述质量块包括围设成所述收容孔的孔壁及与所述孔壁相对的外表面，所述磁路结构包括贴设于所述孔壁的极芯和贴设于所述极芯且与所述线圈组件相对设置的磁钢，所述质量块还包括自所述孔壁向所述外表面凹陷形成的凹槽，所述极芯包括平贴于所述磁钢远离所述线圈组件一侧的平坦部及自所述平坦部靠近所述孔壁的相对两端分别向所述线圈组件弯折延伸的折弯部，所述平坦部和所述折弯部完全收容于所述凹槽内。The linear vibration motor provided by the present invention includes a casing, a coil assembly accommodated in the casing, a vibration unit and an elastic support for supporting the vibration unit, the casing has a bottom plate for fixing the coil assembly, and the vibration unit It includes a mass block with a receiving hole and a magnetic circuit structure fixed in the receiving hole and formed with a magnetic gap at intervals. The coil assembly is located in the magnetic gap and interacts with the magnetic circuit structure to drive the vibration. The unit vibrates along a vibration direction parallel to the bottom plate, the mass block includes a hole wall surrounding the receiving hole and an outer surface opposite to the hole wall, and the magnetic circuit structure includes a wall attached to the hole The pole core of the wall and the magnetic steel attached to the pole core and opposite to the coil assembly, the mass block further comprises a groove formed by concave from the hole wall to the outer surface, the pole core It includes a flat part that is flat on the side of the magnetic steel away from the coil assembly, and a bending part that is bent and extended to the coil assembly from opposite ends of the flat part close to the hole wall, respectively. The part and the bending part are completely accommodated in the groove.
优选地，所述凹槽包括与所述外表面平行相对的底壁以及连接所述底壁和所述孔壁的侧壁，所述平坦部平贴于所述底壁，所述折弯部平贴于所述侧壁且其延伸不超出所述凹槽。Preferably, the groove includes a bottom wall parallel to the outer surface and a side wall connecting the bottom wall and the hole wall, the flat portion is flat against the bottom wall, and the bent portion It is flat on the side wall and does not extend beyond the groove.
优选地，所述极芯还包括自所述折弯部沿着所述孔壁弯折延伸的延伸部，所述延伸部平贴于所述孔壁。Preferably, the pole core further includes an extension portion bent and extended from the bending portion along the hole wall, and the extension portion is flatly attached to the hole wall.
优选地，所述折弯部与所述平坦部和所述延伸部垂直。Preferably, the bent portion is perpendicular to the flat portion and the extension portion.
优选地，所述孔壁包括沿所述质量块的短轴边间隔设置的一对第一孔壁以及沿所述质量块的长轴边间隔设置的一对第二孔壁，一对所述第一孔壁上分别凹陷形成有所述凹槽，一对所述凹槽内分别收容有所述极芯，所述质量块的长轴边沿所述振动方向延伸。Preferably, the hole walls include a pair of first hole walls spaced along the short axis side of the mass block and a pair of second hole walls spaced along the long axis side of the mass block, a pair of the The first hole walls are respectively recessed with the grooves, the pole cores are respectively accommodated in a pair of the grooves, and the long axis edge of the mass block extends along the vibration direction.
优选地，所述极芯由导磁板冲压成型。Preferably, the pole core is stamped and formed by a magnetic conductive plate.
优选地，所述线圈组件包括芯体及绕设于所述芯体外周的线圈，所述线圈的轴线沿所述振动方向延伸。Preferably, the coil assembly includes a core body and a coil wound around the outer periphery of the core body, and the axis of the coil extends along the vibration direction.
优选地，所述芯体包括主体部及固设于所述主体部的两端的固定端，所述线圈设于缠绕在所述主体部上，所述固定端固定在所述底板上。Preferably, the core body includes a main body and fixed ends fixed on both ends of the main body, the coil is wound on the main body, and the fixed ends are fixed on the bottom plate.
优选地，所述芯体为铁芯。Preferably, the core body is an iron core.
有益效果beneficial effect
与相关技术相比，本发明提供的线性振动电机通过将所述极芯设置成包括平贴于所述磁钢远离所述线圈组件一侧的平坦部、自所述平坦部靠近所述孔壁的相对两端分别向所述线圈组件弯折延伸的折弯部，即通过所述极芯折弯处理可以使得所述极芯在平坦部于折弯部附近以及所述折弯部的磁感应强度增大（即通过所述极芯折弯处理可以增强磁间隙内的磁通量），从而可以提高瞬态振动性能（磁通量越大，振动单元启动及刹车时间越短）。同时，通过在所述孔壁上设置配合所述极芯的所述凹槽，不仅可以在保证磁路性能的情况下，降低零部件（极芯和磁钢）的装配难度以及提升装配精度，而且在不牺牲收容孔容积的情况下，可以拓宽质量块的壁厚和增加质量块重量，从而可以降低质量块跌落时出现断裂的风险。Compared with the related art, in the linear vibration motor provided by the present invention, by arranging the pole core to include a flat portion that is flat on the side of the magnetic steel far away from the coil assembly, and approaching the hole wall from the flat portion The opposite ends of the pole core are respectively bent and extended to the coil assembly, that is, the pole core can be bent at the flat part near the bent part and the magnetic induction intensity of the bent part can be made by the pole core bending process. increase (that is, the magnetic flux in the magnetic gap can be enhanced by the pole core bending process), so that the transient vibration performance can be improved (the greater the magnetic flux, the shorter the starting and braking time of the vibration unit). At the same time, by arranging the groove on the hole wall to match the pole core, it can not only reduce the assembly difficulty of the components (pole core and magnetic steel) and improve the assembly accuracy under the condition of ensuring the performance of the magnetic circuit, Moreover, without sacrificing the volume of the receiving hole, the wall thickness of the mass block can be widened and the weight of the mass block can be increased, thereby reducing the risk of fracture when the mass block is dropped.
附图说明Description of drawings
图1为本发明提供的线性振动电机实施例一的立体分解示意图。FIG. 1 is a perspective exploded schematic diagram of Embodiment 1 of the linear vibration motor provided by the present invention.
图2为图1所示线性振动电机的部分分解示意图。FIG. 2 is a partially exploded schematic view of the linear vibration motor shown in FIG. 1 .
图3为图1所示线性振动电机组装后的立体图。FIG. 3 is a perspective view of the linear vibration motor shown in FIG. 1 after being assembled.
图4为图3所示线性振动电机沿A-A线的剖视图。FIG. 4 is a cross-sectional view of the linear vibration motor shown in FIG. 3 taken along line A-A.
图5为图4所示线性振动电机中质量块的结构示意图。FIG. 5 is a schematic structural diagram of a mass block in the linear vibration motor shown in FIG. 4 .
图6为图3所示线性振动电机沿B-B线的剖视图。FIG. 6 is a cross-sectional view of the linear vibration motor shown in FIG. 3 taken along line B-B.
图7为本发明提供的线性振动电机实施例二的结构示意图。FIG. 7 is a schematic structural diagram of Embodiment 2 of the linear vibration motor provided by the present invention.
本发明的实施方式Embodiments of the present invention
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部份实施例，而不是全部的实施例。基于本发明中的实施例，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他实施例，都属于本发明保护的范围。The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. . Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
如图1至图6所示，所述线性振动电机100包括外壳1以及收容于所述外壳1内的线圈组件2、振动单元3及支撑所述振动单元3的弹性支撑件4。As shown in FIGS. 1 to 6 , the linear vibration motor 100 includes a housing 1 , a coil assembly 2 accommodated in the housing 1 , a vibration unit 3 , and an elastic support 4 supporting the vibration unit 3 .
所述外壳1包括壳体11及与所述壳体11组配形成收容空间1B的底板13，所述线圈组件2固定于所述底板13。The casing 1 includes a casing 11 and a bottom plate 13 assembled with the casing 11 to form a receiving space 1B, and the coil assembly 2 is fixed on the bottom plate 13 .
所述线圈组件2包括芯体21及绕设于所述芯体21外周的线圈23，其中，所述线圈23的轴线方向为所述振动单元3的振动方向，所述振动方向与所述底板13平行。The coil assembly 2 includes a core body 21 and a coil 23 wound around the outer circumference of the core body 21 , wherein the axis direction of the coil 23 is the vibration direction of the vibration unit 3 , and the vibration direction is related to the base plate. 13 parallel.
所述芯体21可以为柱状，也可以为“工”字形。在本实施例中，所述芯体21为“工”字形，其包括主体部211及固设于所述主体部211的两端的固定端213，所述线圈23设于缠绕在所述主体部211上，所述线圈组件2通过所述固定端213固定在所述底板13上。The core body 21 may be in the shape of a column or an "I" shape. In this embodiment, the core body 21 is “I”-shaped, and includes a main body portion 211 and fixed ends 213 fixed on both ends of the main body portion 211 , and the coil 23 is wound around the main body portion. 211 , the coil assembly 2 is fixed on the base plate 13 through the fixed end 213 .
在本实施例中，所述芯体21为铁芯。所述线圈23通电后，所述芯体21被所述线圈23的磁场磁化，磁化后的所述芯体21变成一个磁体，该磁体的磁场与所述线圈23的磁场相互叠加，从而使得所述线圈组件2的磁力增加。In this embodiment, the core body 21 is an iron core. After the coil 23 is energized, the core 21 is magnetized by the magnetic field of the coil 23, the magnetized core 21 becomes a magnet, and the magnetic field of the magnet and the magnetic field of the coil 23 are superimposed on each other, so that the The magnetic force of the coil assembly 2 increases.
所述线圈23通过电路板5与外部电源电连接。如图3和图6所示，所述电路板5固定在所述底板13上，且其一端延伸出所述收容空间1B以与外部电路电连接。The coil 23 is electrically connected to an external power source through the circuit board 5 . As shown in FIG. 3 and FIG. 6 , the circuit board 5 is fixed on the bottom plate 13 , and one end of the circuit board 5 extends out of the receiving space 1B to be electrically connected to an external circuit.
所述振动单元3包括具有收容孔3A的质量块31及固定于所述收容孔3A并且间隔设置形成有磁间隙3B的磁路结构33，所述线圈组件2位于所述磁间隙3B内并与所述磁路结构33相互作用以驱动所述振动单元3沿所述振动方向振动。The vibration unit 3 includes a mass block 31 with a receiving hole 3A and a magnetic circuit structure 33 fixed in the receiving hole 3A and formed with a magnetic gap 3B at intervals. The magnetic circuit structures 33 interact to drive the vibration unit 3 to vibrate along the vibration direction.
所述质量块31包括围设成所述收容孔3A的孔壁35、与所述孔壁35相对的外表面37及自所述孔壁35向所述外表面37凹陷形成的凹槽39。The mass block 31 includes a hole wall 35 surrounding the receiving hole 3A, an outer surface 37 opposite to the hole wall 35 , and a groove 39 recessed from the hole wall 35 to the outer surface 37 .
所述磁路结构33包括贴设于所述孔壁35的极芯331和贴设于所述极芯331且与所述线圈组件2相对设置的磁钢333。The magnetic circuit structure 33 includes a pole core 331 attached to the hole wall 35 and a magnetic steel 333 attached to the pole core 331 and opposite to the coil assembly 2 .
所述极芯331包括平贴于所述磁钢333远离所述线圈组件2一侧的平坦部335、自所述平坦部335靠近所述孔壁35的相对两端分别向所述线圈组件2弯折延伸的折弯部337及自所述折弯部337沿着所述孔壁35弯折延伸的延伸部339，所述平坦部335和所述折弯部337完全收容于所述凹槽39内。如图4所示，所述折弯部337与所述平坦部335和所述延伸部339垂直。The pole core 331 includes a flat portion 335 that is flat on the side of the magnetic steel 333 away from the coil assembly 2 . The bent portion 337 bent and extended and the extension portion 339 bent and extended from the bent portion 337 along the hole wall 35 , the flat portion 335 and the bent portion 337 are completely accommodated in the groove within 39. As shown in FIG. 4 , the bent portion 337 is perpendicular to the flat portion 335 and the extension portion 339 .
所述凹槽39包括与所述外表面37平行相对的底壁391以及连接所述底壁391和所述孔壁35的侧壁393，所述平坦部335平贴于所述底壁391，所述折弯部337平贴于所述侧壁393且其延伸不超出所述凹槽39。The groove 39 includes a bottom wall 391 parallel to the outer surface 37 and a side wall 393 connecting the bottom wall 391 and the hole wall 35. The flat portion 335 is flat on the bottom wall 391, The bent portion 337 is flat against the side wall 393 and does not extend beyond the groove 39 .
所述孔壁35包括沿所述质量块31的短轴边间隔设置的一对第一孔壁351以及沿所述质量块31的长轴边间隔设置的一对第二孔壁353，一对所述第一孔壁351上分别凹陷形成有所述凹槽39，一对所述凹槽39内分别收容有所述极芯331，其中，所述质量块31的长轴边沿所述振动方向延伸。The hole wall 35 includes a pair of first hole walls 351 spaced along the short axis of the mass block 31 and a pair of second hole walls 353 spaced along the long axis of the mass block 31 . The first hole walls 351 are respectively recessed with the grooves 39 , and the pole cores 331 are respectively accommodated in a pair of the grooves 39 , wherein the long axis of the mass block 31 is along the vibration direction extend.
也就是说，所述磁路结构33包括两个所述极芯331和两个所述磁钢333，以一个所述极芯331和一个所述磁钢333为一组构成的两组磁单元沿所述质量块31的短轴边间隔设置。所述磁钢333的极性方向沿所述质量块31的短轴边设置，且两个所述磁钢333的极性方向相反，在所述线圈23通电时，所述芯体21具有沿所述质量块31的长轴边（即所述振动方向）分布的两个磁极（N极和S极），从而可使得所述线圈组件2与所述磁路结构33的所述磁钢333相互作用以驱动所述振动单元3沿所述振动方向振动。如图4所示，所述磁钢333的靠近所述平坦部335的一侧为S极，其靠近所述线圈组件2的一侧为N极。That is to say, the magnetic circuit structure 33 includes two of the pole cores 331 and two of the magnetic steels 333 , and two sets of magnetic units are formed with one of the pole cores 331 and one of the magnetic steels 333 as a group. They are arranged at intervals along the short axis side of the mass block 31 . The polarity direction of the magnetic steel 333 is arranged along the short axis of the mass block 31, and the polar directions of the two magnetic steels 333 are opposite. There are two magnetic poles (N pole and S pole) distributed on the long axis side of the mass block 31 (ie, the vibration direction), so that the coil assembly 2 and the magnetic steel 333 of the magnetic circuit structure 33 can be connected. interact to drive the vibration unit 3 to vibrate in the vibration direction. As shown in FIG. 4 , the side of the magnetic steel 333 close to the flat portion 335 is the S pole, and the side close to the coil assembly 2 is the N pole.
在本实施例中，所述磁路结构33还包括固定于所述第二孔壁353的辅助极芯33A及固设于所述辅助极芯33A朝向所述线圈组件2一侧的辅助磁钢33B。其中，两个所述辅助磁钢33B同极相对设置，从而在所述线圈23通电时，可使得所述线圈组件2与所述磁路结构33的所述磁钢333和所述辅助磁钢33B相互作用以实现振动电机的快速反应。如图1和图4所示，所述辅助极芯33A呈平板状；所述辅助磁钢33B的靠近所述辅助极芯33A的一侧为N极，其靠近所述线圈组件2的一侧为S极。In this embodiment, the magnetic circuit structure 33 further includes an auxiliary pole core 33A fixed on the second hole wall 353 and an auxiliary magnetic steel fixed on the side of the auxiliary pole core 33A facing the coil assembly 2 . 33B. Wherein, the two auxiliary magnetic steels 33B are arranged opposite to each other with the same pole, so that when the coil 23 is energized, the coil assembly 2 and the magnetic steel 333 and the auxiliary magnetic steel of the magnetic circuit structure 33 can be made The 33B interacts to achieve the fast response of the vibration motor. As shown in FIG. 1 and FIG. 4 , the auxiliary pole core 33A is in the shape of a flat plate; the side of the auxiliary magnetic steel 33B close to the auxiliary pole core 33A is the N pole, and the side close to the coil assembly 2 for the S pole.
可以理解的是，在其他实施例中，所述第二孔壁353上也可以凹陷形成所述凹槽，所述辅助极芯33A也可以设置成如所述极芯331的形状；或者，所述第二孔壁353上凹陷形成所述凹槽，所述辅助极芯33A设置成如图4所示的极芯331的形状（即辅助极芯33A具有折弯），而所述第一孔壁351上不设置所述凹槽，相应的，极芯设置成平板状。It can be understood that, in other embodiments, the second hole wall 353 can also be recessed to form the groove, and the auxiliary pole core 33A can also be set to the shape of the pole core 331; The second hole wall 353 is recessed to form the groove, the auxiliary pole core 33A is arranged in the shape of the pole core 331 as shown in FIG. 4 (that is, the auxiliary pole core 33A has a bend), and the first hole The grooves are not provided on the wall 351, and correspondingly, the pole core is provided in a flat plate shape.
在本实施例中，所述极芯331由导磁板冲压成型。In this embodiment, the pole core 331 is stamped and formed by a magnetic conductive plate.
所述振动单元3沿所述振动方向的相对两侧分别设有所述弹性支撑件4。所述弹性支撑件4为U型弹簧，且两个所述弹性支撑件4的开口方向相对设置。The elastic support members 4 are respectively provided on opposite sides of the vibration unit 3 along the vibration direction. The elastic supports 4 are U-shaped springs, and the opening directions of the two elastic supports 4 are opposite to each other.
所述弹性支撑件4包括与所述质量块31连接的第一固定部41、与所述外壳1连接的第二固定部43及连接所述第一固定部41和所述第二固定部43的形变部45，所述第二固定部43与所述第一固定部41沿所述质量块31的短轴边间隔设置。The elastic support member 4 includes a first fixing portion 41 connected with the mass block 31 , a second fixing portion 43 connected with the housing 1 , and connecting the first fixing portion 41 and the second fixing portion 43 . The deformation portion 45 of the second fixing portion 43 and the first fixing portion 41 are arranged at intervals along the short axis side of the mass block 31 .
所述第一固定部41与所述外壳1之间以及所述第二固定部43与所述质量块31之间设有缓冲片6。其中，所述缓冲片6可以采用泡棉、橡胶、硅等制成。所述缓冲片6可以防止所述振动单元3在振动过程中所述弹性支撑件4与所述外壳1和所述质量块31发生碰撞，从而提高产品的可靠性。A buffer sheet 6 is provided between the first fixing portion 41 and the housing 1 and between the second fixing portion 43 and the mass 31 . Wherein, the buffer sheet 6 can be made of foam, rubber, silicon or the like. The buffer sheet 6 can prevent the elastic support 4 from colliding with the housing 1 and the mass 31 during the vibration of the vibration unit 3, thereby improving the reliability of the product.
图7是实施例二中线性振动电机200的结构示意图，实施例二与实施例一基本相同，以下列表中符号含义与实施例一也相同，故对于相同的部分此处不再赘述，以下仅列出不同点。7 is a schematic structural diagram of the linear vibration motor 200 in the second embodiment. The second embodiment is basically the same as the first embodiment, and the meanings of the symbols in the following list are also the same as those in the first embodiment. Therefore, the same parts will not be repeated here, and the following only List the differences.
在本实施例中，所述极芯331仅包括平贴于所述磁钢333远离所述线圈组件2一侧的平坦部335、自所述平坦部335靠近所述孔壁35的相对两端分别向所述线圈组件2弯折延伸的折弯部337，而不包括延伸部。In this embodiment, the pole core 331 only includes a flat portion 335 that is flat on the side of the magnetic steel 333 away from the coil assembly 2 , and opposite ends of the flat portion 335 that are close to the hole wall 35 . The bent portions 337 that are respectively bent and extended toward the coil assembly 2 do not include the extension portion.
在本实施例中，所述质量块31沿所述振动方向的相对两侧还设有缓冲块7。In this embodiment, buffer blocks 7 are further provided on opposite sides of the mass block 31 along the vibration direction.
需要说明的是，相对于相关技术中仅具有平坦部的极芯，实施例一和实施例二中的极芯均通过自所述平坦部335的相对两端分别弯折延伸形成折弯部337，从而达到提高磁间隙3B内的磁通量的目的。磁通量的大小主要影响线性振动电机的瞬态性能，磁通量越大，线性振动电机启动及刹车时间越短。其中，相对于实施例二的极芯，实施例一的极芯还自所述折弯部337弯折延伸形成有延伸部339，所述延伸部339的设置可以进一步提高磁间隙3B内的磁通量，因此，相对于实施例二的线性振动电机，实施例一的线性振动电机启动及刹车时间更短；另一方面，相对于实施例一的振动单元（振动单元包括极芯），实施例二的振动单元（振动单元包括极芯）的加速度均方根值(Grms) 更大，加速度均方根值(Grms) 的大小主要影响线性振动电机的稳态性能，加速度均方根值(Grms) 的越大，线性振动电机的振感越强，因此，相对于实施例一的线性振动电机，实施例二的线性振动电机振感更强。It should be noted that, compared with the pole core having only a flat part in the related art, the pole core in the first embodiment and the second embodiment both form bending parts 337 by bending and extending from opposite ends of the flat part 335 respectively. , so as to achieve the purpose of increasing the magnetic flux in the magnetic gap 3B. The size of the magnetic flux mainly affects the transient performance of the linear vibration motor. The larger the magnetic flux, the shorter the starting and braking time of the linear vibration motor. Wherein, compared with the pole core of the second embodiment, the pole core of the first embodiment is further bent and extended from the bending part 337 to form an extension part 339 , and the arrangement of the extension part 339 can further improve the magnetic flux in the magnetic gap 3B , therefore, relative to the linear vibration motor of the second embodiment, the linear vibration motor of the first embodiment has a shorter starting and braking time; on the other hand, relative to the vibration unit of the first embodiment (the vibration unit includes a pole core), The acceleration root mean square value (Grms) of the vibration unit (the vibration unit includes the pole core) is larger, and the acceleration root mean square value (Grms) mainly affects the steady-state performance of the linear vibration motor. The acceleration root mean square value (Grms) The larger the value of , the stronger the vibration sense of the linear vibration motor. Therefore, compared with the linear vibration motor of the first embodiment, the vibration sense of the linear vibration motor of the second embodiment is stronger.
本发明提供的线性振动电机通过将所述极芯331设置成包括平贴于所述磁钢333远离所述线圈组件2一侧的平坦部335、自所述平坦部335靠近所述孔壁35的相对两端分别向所述线圈组件2弯折延伸的折弯部337，即通过所述极芯331折弯处理可以使得所述极芯331在平坦部335于折弯部337附近以及所述折弯部337的磁感应强度增大（即通过所述极芯331折弯处理可以增强磁间隙3B内的磁通量），从而可以提高瞬态振动性能（磁通量越大，振动单元启动及刹车时间越短）。同时，通过在所述孔壁35上设置配合所述极芯331的所述凹槽39，不仅可以在保证磁路性能的情况下，降低零部件（极芯和磁钢）的装配难度以及提升装配精度，而且在不牺牲收容孔容积的情况下，可以拓宽质量块31的壁厚和增加质量块31重量，从而可以降低质量块31跌落时出现断裂的风险。In the linear vibration motor provided by the present invention, the pole core 331 is arranged to include a flat portion 335 that is flat on the side of the magnetic steel 333 away from the coil assembly 2 , and is close to the hole wall 35 from the flat portion 335 . The opposite ends of the coil assembly 2 are respectively bent and extended toward the bending portion 337 of the coil assembly 2, that is, the pole core 331 can be bent at the flat portion 335 near the bending portion 337 and the The magnetic induction intensity of the bent portion 337 is increased (that is, the magnetic flux in the magnetic gap 3B can be enhanced by the bending of the pole core 331 ), so that the transient vibration performance can be improved (the greater the magnetic flux, the shorter the starting and braking time of the vibration unit). ). At the same time, by arranging the groove 39 on the hole wall 35 to fit the pole core 331 , not only can the performance of the magnetic circuit be ensured, the assembly difficulty of the components (pole core and magnetic steel) can be reduced and improved. Assembly accuracy, and without sacrificing the volume of the receiving hole, the wall thickness of the mass block 31 can be widened and the weight of the mass block 31 can be increased, thereby reducing the risk of fracture when the mass block 31 is dropped.
以上所述的仅是本发明的实施方式，在此应当指出，对于本领域的普通技术人员来说，在不脱离本发明创造构思的前提下，还可以做出改进，但这些均属于本发明的保护范围。The above are only the embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present invention, but these belong to the present invention. scope of protection.

Claims (9)

  1. 一种线性振动电机，包括外壳以及收容于所述外壳内的线圈组件、振动单元及支撑所述振动单元的弹性支撑件，所述外壳具有固定所述线圈组件的底板，所述振动单元包括具有收容孔的质量块及固定于所述收容孔并且间隔设置形成有磁间隙的磁路结构，所述线圈组件位于所述磁间隙内并与所述磁路结构相互作用以驱动所述振动单元沿平行于所述底板的振动方向振动，所述质量块包括围设成所述收容孔的孔壁及与所述孔壁相对的外表面，所述磁路结构包括贴设于所述孔壁的极芯和贴设于所述极芯且与所述线圈组件相对设置的磁钢，其特征在于：所述质量块还包括自所述孔壁向所述外表面凹陷形成的凹槽，所述极芯包括平贴于所述磁钢远离所述线圈组件一侧的平坦部及自所述平坦部靠近所述孔壁的相对两端分别向所述线圈组件弯折延伸的折弯部，所述平坦部和所述折弯部完全收容于所述凹槽内。A linear vibration motor includes a casing, a coil assembly housed in the casing, a vibration unit and an elastic support for supporting the vibration unit, the casing has a bottom plate for fixing the coil assembly, and the vibration unit includes a The mass block of the accommodating hole and the magnetic circuit structure fixed in the accommodating hole and formed with a magnetic gap are arranged at intervals, and the coil assembly is located in the magnetic gap and interacts with the magnetic circuit structure to drive the vibration unit along the Vibrates parallel to the vibration direction of the bottom plate, the mass block includes a hole wall surrounding the receiving hole and an outer surface opposite to the hole wall, and the magnetic circuit structure includes a magnetic circuit structure attached to the hole wall. A pole core and a magnetic steel attached to the pole core and opposite to the coil assembly, characterized in that: the mass block further includes a groove formed by concave from the hole wall to the outer surface, the The pole core includes a flat portion flatly attached to the side of the magnetic steel away from the coil assembly, and a bent portion that is bent and extended to the coil assembly from opposite ends of the flat portion close to the hole wall, respectively. The flat portion and the bent portion are completely accommodated in the groove.
  2. 根据权利要求1所述的线性振动电机，其特征在于：所述凹槽包括与所述外表面平行相对的底壁以及连接所述底壁和所述孔壁的侧壁，所述平坦部平贴于所述底壁，所述折弯部平贴于所述侧壁且其延伸不超出所述凹槽。The linear vibration motor of claim 1, wherein the groove comprises a bottom wall parallel to the outer surface and a side wall connecting the bottom wall and the hole wall, the flat portion is flat Affixed to the bottom wall, the bent portion is flatly attached to the side wall and does not extend beyond the groove.
  3. 根据权利要求2所述的线性振动电机，其特征在于：所述极芯还包括自所述折弯部沿着所述孔壁弯折延伸的延伸部，所述延伸部平贴于所述孔壁。The linear vibration motor according to claim 2, wherein the pole core further comprises an extension portion bent and extended from the bending portion along the hole wall, and the extension portion is flat against the hole wall.
  4. 根据权利要求3所述的线性振动电机，其特征在于：所述折弯部与所述平坦部和所述延伸部垂直。The linear vibration motor according to claim 3, wherein the bent portion is perpendicular to the flat portion and the extension portion.
  5. 根据权利要求1-4中任一项所述的线性振动电机，其特征在于：所述孔壁包括沿所述质量块的短轴边间隔设置的一对第一孔壁以及沿所述质量块的长轴边间隔设置的一对第二孔壁，一对所述第一孔壁上分别凹陷形成有所述凹槽，一对所述凹槽内分别收容有所述极芯，所述质量块的长轴边沿所述振动方向延伸。The linear vibration motor according to any one of claims 1-4, wherein the hole wall comprises a pair of first hole walls spaced along the short axis side of the mass block and a pair of first hole walls along the short axis of the mass block. A pair of second hole walls are spaced apart from the long axis of the pair of holes, a pair of the first hole walls are respectively recessed to form the grooves, and the pole cores are respectively accommodated in a pair of the grooves, and the mass The long axis edge of the block extends along the vibration direction.
  6. 根据权利要求1-4中任一项所述的线性振动电机，其特征在于：所述极芯由导磁板冲压成型。The linear vibration motor according to any one of claims 1-4, wherein the pole core is stamped and formed by a magnetic conducting plate.
  7. 根据权利要求1所述的线性振动电机，其特征在于：所述线圈组件包括芯体及绕设于所述芯体外周的线圈，所述线圈的轴线沿所述振动方向延伸。The linear vibration motor according to claim 1, wherein the coil assembly comprises a core body and a coil wound around the outer periphery of the core body, and the axis of the coil extends along the vibration direction.
  8. 根据权利要求7所述的线性振动电机，其特征在于：所述芯体包括主体部及固设于所述主体部的两端的固定端，所述线圈设于缠绕在所述主体部上，所述固定端固定在所述底板上。The linear vibration motor according to claim 7, wherein the core body comprises a main body and fixed ends fixed on both ends of the main body, the coil is wound on the main body, and the coil is wound on the main body. The fixed end is fixed on the base plate.
  9. 根据权利要求7或8所述的线性振动电机，其特征在于：所述芯体为铁芯。The linear vibration motor according to claim 7 or 8, wherein the core body is an iron core.
PCT/CN2020/104503 2020-06-28 2020-07-24 Linear vibration motor WO2022000642A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202021221438.X 2020-06-28
CN202021221438.XU CN212381094U (en) 2020-06-28 2020-06-28 Linear vibration motor

Publications (1)

Publication Number Publication Date
WO2022000642A1 true WO2022000642A1 (en) 2022-01-06

Family

ID=74163884

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/104503 WO2022000642A1 (en) 2020-06-28 2020-07-24 Linear vibration motor

Country Status (2)

Country Link
CN (1) CN212381094U (en)
WO (1) WO2022000642A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN215580856U (en) * 2021-06-25 2022-01-18 歌尔股份有限公司 Linear vibration motor
CN115085437B (en) * 2021-12-06 2023-04-18 荣耀终端有限公司 Vibration motor and terminal device
CN218514266U (en) * 2022-09-09 2023-02-21 瑞声光电科技(常州)有限公司 Vibration exciter

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015112013A (en) * 2015-02-20 2015-06-18 日本電産コパル株式会社 Vibration actuator and portable information terminal
JP2017184618A (en) * 2017-07-06 2017-10-05 ミネベアミツミ株式会社 Vibration generator
CN206878669U (en) * 2017-05-26 2018-01-12 瑞声科技（南京）有限公司 Vibrating motor
CN208589892U (en) * 2018-08-03 2019-03-08 瑞声科技（南京）有限公司 Vibrating motor
CN208589897U (en) * 2018-08-03 2019-03-08 瑞声科技（南京）有限公司 Linear vibration electric motor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015112013A (en) * 2015-02-20 2015-06-18 日本電産コパル株式会社 Vibration actuator and portable information terminal
CN206878669U (en) * 2017-05-26 2018-01-12 瑞声科技（南京）有限公司 Vibrating motor
JP2017184618A (en) * 2017-07-06 2017-10-05 ミネベアミツミ株式会社 Vibration generator
CN208589892U (en) * 2018-08-03 2019-03-08 瑞声科技（南京）有限公司 Vibrating motor
CN208589897U (en) * 2018-08-03 2019-03-08 瑞声科技（南京）有限公司 Linear vibration electric motor

Also Published As

Publication number Publication date
CN212381094U (en) 2021-01-19

Similar Documents

Publication Publication Date Title
US8987951B2 (en) Linear vibrator
US11784549B2 (en) Motor
US11211857B2 (en) Linear vibration motor having accommodation spaces provided for magnets in a support member
WO2022000642A1 (en) Linear vibration motor
US10674279B1 (en) Speaker
CN209390352U (en) Microphone device
US11289990B2 (en) Linear vibration motor
US20220200427A1 (en) Linear Vibration Motor
US11309782B2 (en) Linear vibration motor
WO2020140531A1 (en) Linear vibration motor
US11316419B2 (en) Linear vibration motor
WO2021000088A1 (en) Vibration motor
WO2022000643A1 (en) Linear vibration electric motor
CN110166902B (en) Sound production device
WO2020134378A1 (en) Linear vibration motor
WO2020140546A1 (en) Vibration electric motor
WO2020134379A1 (en) Linear vibration motor
US10596593B2 (en) Vibration motor
WO2021237786A1 (en) Linear vibration electric motor
WO2020098426A1 (en) Vibration electric motor
JP2023152596A (en) vibration motor
CN219477823U (en) Linear vibration motor
WO2022006837A1 (en) Linear motor
US11967874B2 (en) Linear vibration motor with copper rig around magnetic conductive plate with thickness
US20220200404A1 (en) Vibration motor

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: 20942895

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: 20942895

Country of ref document: EP

Kind code of ref document: A1