WO2018171060A1 - Moteur à vibration linéaire - Google Patents

Moteur à vibration linéaire Download PDF

Info

Publication number
WO2018171060A1
WO2018171060A1 PCT/CN2017/089569 CN2017089569W WO2018171060A1 WO 2018171060 A1 WO2018171060 A1 WO 2018171060A1 CN 2017089569 W CN2017089569 W CN 2017089569W WO 2018171060 A1 WO2018171060 A1 WO 2018171060A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic field
vibration motor
reinforcing portion
vibrator
field reinforcing
Prior art date
Application number
PCT/CN2017/089569
Other languages
English (en)
Chinese (zh)
Inventor
朱跃光
孙长军
Original Assignee
歌尔股份有限公司
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 歌尔股份有限公司 filed Critical 歌尔股份有限公司
Publication of WO2018171060A1 publication Critical patent/WO2018171060A1/fr

Links

Images

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
    • 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
    • H02K33/16—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with polarised armatures moving in alternate directions by reversal or energisation of a single coil system

Definitions

  • the present invention relates to the field of vibration device technology, and more particularly to a linear vibration motor that vibrates in a short axis direction.
  • a miniature vibration motor is generally used for system feedback.
  • the incoming call alert of the mobile phone the vibration feedback of the gaming machine, and the like.
  • the vibration direction of the vibration motor is generally along the horizontal long axis direction.
  • the long axis direction is the extending direction of the long side of the vibration motor.
  • Such a vibration motor generally includes a vibrator assembly and a metal dome housed in a housing.
  • a metal dome is used to suspend the magnetic vibrator within the housing.
  • the metal shrapnel not only provides a restoring force to the vibrator assembly, but also provides a supporting force for suspending the vibrator assembly in the space.
  • the magnetic circuit of the long-axis direction vibration motor is mostly vertically magnetized, and the magnetization direction is perpendicular to the coil, thereby forming a long-axis direction driving force.
  • the short axis direction is the extending direction of the short side of the vibration motor.
  • F Lorentz force formula
  • B magnetic induction intensity
  • I current magnitude
  • L wire length. Since the length L of the wire is limited by the short axis, it cannot be made large, so that the driving force is limited.
  • the strength of the magnetic induction strength limits the magnitude of the driving force of the vibration motor. Since the magnetic induction intensity is small, the response time is prolonged and the vibration effect is poor.
  • a linear vibration motor includes a housing, a vibrator, a coil, and an elastic member, the housing having a cavity, the vibrator, the coil and the elastic member being disposed in the cavity, the vibrator being suspended by the elastic member
  • the vibrator includes a first permanent magnet connected together, a magnetic field reinforcing portion and a weight portion, a long side of the first permanent magnet, a long side of the magnetic field reinforcing portion, and the coil
  • the long sides are respectively parallel to the long axis direction, and the short sides of the three are respectively parallel to the short axis direction
  • the first permanent magnets are plural and the magnetization direction is parallel to the vibration direction
  • the adjacent first permanent magnets The adjacent one side has the same polarity, the first permanent magnet is spaced apart from the magnetic field reinforcing portion, and the long side of the coil is opposite to the magnetic field reinforcing portion so that the vibrator is short Vibration in the axial direction.
  • the magnetic field reinforcing portion is a second permanent magnet, and a magnetizing direction of the second permanent magnet is perpendicular to a vibration direction.
  • the magnetic field reinforcing portion is made of a magnetic conductive material.
  • the weight portion is made of a magnetic conductive material, and the magnetic field reinforcing portion and the weight portion are integrally formed.
  • the number of the coils is two
  • the number of the first permanent magnets is two
  • the magnetic field reinforcing portion is one.
  • the adjacent long sides of the two coils and the magnetic field reinforcing portion are respectively In contrast, the two long sides opposite to the magnetic field reinforcing portion have the same current direction.
  • two of the long sides opposite to the magnetic field reinforcing portion are symmetrically disposed with respect to a center line of the magnetic field reinforcing portion.
  • a pole core is further disposed, the coil is disposed around the pole core, the pole core is in one-to-one correspondence with the coil, and the pole core and the shell are made of a magnetic conductive material, each The pole core is coupled to the housing, each of the pole cores magnetizing a sidewall of the housing adjacent the pole core, and a magnetic force is formed between the sidewall and the first permanent magnet.
  • the pole core is integrally formed with the housing.
  • the pole core is formed by the housing being recessed inwardly.
  • the elastic element is a spring piece
  • the elastic piece includes a first connecting portion for connecting with the housing, a second connecting portion for connecting with the vibrator, and a middle portion between the first connecting portion and the second connecting portion.
  • a spring arm which is in the form of a straight piece.
  • the inventors of the present invention have found that in the prior art, the length of the wire cannot be made large due to the size in the short-axis direction, and the driving force of the vibrator is small. Therefore, the technical task to be achieved by the present invention Or the technical problem to be solved is unexpected or unexpected by those skilled in the art, so the present invention is a new technical solution.
  • FIG. 1 is an exploded view of a linear vibration motor in accordance with one embodiment of the present invention.
  • FIG. 2 is an assembled view of a stator and a lower case in accordance with one embodiment of the present invention.
  • Figure 3 is a schematic view showing the structure of a lower case in accordance with one embodiment of the present invention.
  • FIG. 4 is a schematic structural view of a shrapnel according to an embodiment of the present invention.
  • Figure 5 is a cross-sectional view of a linear vibration motor in accordance with one embodiment of the present invention.
  • Figure 6 is a cross-sectional view of a linear vibration motor in accordance with another embodiment of the present invention.
  • Figure 7 is a bottom plan view of a linear vibration motor without a lower case, in accordance with one embodiment of the present invention.
  • Figure 8 is a schematic view showing the structure of a magnet assembly in accordance with one embodiment of the present invention.
  • a linear vibration motor is provided.
  • the vibration motor can be used in electronic devices such as mobile phones, game machines, notebook computers, wearable devices, walkie-talkies, and the like.
  • the vibration motor includes a housing, a vibrator, a coil 17, and an elastic member.
  • the housing has a cavity.
  • the vibrator, coil 17 and spring element are disposed within the cavity.
  • the elastic member may be, but not limited to, a spring piece 12, an elastic rubber member, a spring, or the like.
  • the vibrator is suspended in the cavity by a resilient element.
  • the vibrator includes a first permanent magnet 14, a magnetic field reinforcement portion, and a weight portion that are coupled together.
  • the first permanent magnet 14 is used to form a magnetic field.
  • the first permanent magnet 14 is a ferrite magnet or a neodymium iron boron magnet.
  • the magnetic field reinforcement is used to enhance the magnetic induction strength of the vibrator.
  • the weight portion is used to increase the inertia of the vibrator to enhance the vibration.
  • the long side 29 of the first permanent magnet, the long side of the magnetic field reinforcing portion and the long side 27 of the coil are respectively parallel to the long axis direction, and the short side 30 of the first permanent magnet, the short side of the magnetic field reinforcing portion and the short of the coil
  • the sides 28 are respectively parallel to the short axis direction.
  • the shape of the first permanent magnet 14 and the magnetic field reinforcing portion can be designed according to actual needs, as long as it has opposite long sides and short sides, and is easy to process.
  • a rectangular parallelepiped, a cylinder, a prism, and the like For example, a rectangular parallelepiped, a cylinder, a prism, and the like.
  • the first permanent magnets 14 are plural and the magnetization direction is parallel to the short axis direction.
  • the magnetization direction of the first permanent magnet 14 is parallel to the coil 17.
  • Adjacent sides of the plurality of first permanent magnets 14 have the same polarity.
  • the long axis direction is the extending direction of the long side of the linear vibration motor
  • the short axis direction is the extending direction of the short side of the linear vibration motor.
  • the two extension directions are perpendicular to each other.
  • the isotropic repulsion causes adjacent first permanent magnets 14 to form a pair of magnetizing path structures, and the direction of the magnetic field of the gap of adjacent first permanent magnets 14 is perpendicular to the coil 17.
  • the first permanent magnet 14 is spaced apart from the magnetic field reinforcing portion Set.
  • the magnetic field reinforcing portion can enhance the magnetic induction strength of the magnetic field between the adjacent first permanent magnets 14.
  • the long side 27 of the coil opposes the magnetic field reinforcing portion to vibrate the vibrator in the short axis direction.
  • the long side 29 of the first permanent magnet, the long side of the magnetic field reinforcing portion and the long side 27 of the coil are parallel to the long axis direction, respectively, and the short sides of the three are parallel to the short axis direction, respectively, and the vibrator is short. Vibration in the axial direction.
  • the lengths of the first permanent magnet 14, the magnetic field reinforcing portion and the coil 17 are not limited by the housing, and the user can set the lengths of the three according to actual needs, thereby increasing the driving force of the linear vibration motor, shortening the response time, and improving the linearity.
  • the vibration of the vibration motor is not limited by the housing, and the user can set the lengths of the three according to actual needs, thereby increasing the driving force of the linear vibration motor, shortening the response time, and improving the linearity.
  • the magnetic field reinforcing portion can effectively enhance the magnetic induction intensity of the magnetic field between the adjacent first permanent magnets 14, further increase the driving force of the linear vibration motor, shorten the response time, and improve the vibration of the linear vibration motor.
  • the number of the first permanent magnets 14 is plural and the magnetization direction of the first permanent magnets 14 is parallel to the short-axis direction, which can effectively increase the magnetic field strength and further increase the driving force.
  • the weight portion does not need to be designed to avoid the processing difficulty, and the weight portion is easy to obtain a large mass, and the vibration of the linear vibration motor is improved.
  • FIG. 1 is an exploded view of a linear vibration motor in accordance with one embodiment of the present invention.
  • Figure 5 is a cross-sectional view of a linear vibration motor in accordance with one embodiment of the present invention.
  • the housing includes an upper case 11 and a lower case 10.
  • the upper case 11 and the lower case 10 are fastened together to form a cavity inside them.
  • the housing is provided in a rectangular parallelepiped shape.
  • the cross section of the housing may be an approximately rectangular parallelepiped shape, such as an elliptical shape, a racetrack shape, or the like, as long as it has a relatively long axis direction and a short axis direction.
  • the material of the housing may be, but not limited to, metal, plastic, ceramic, and the like.
  • the coil 17 there are two coils 17, two first permanent magnets 14, and one magnetic field reinforcing portion.
  • the adjacent long sides of the two coils 17 are opposed to the magnetic field reinforcing portion, and complement the magnetic field.
  • the two long sides of the opposite part have the same current direction.
  • the coil 17 is disposed on the lower case 10.
  • the coil 17 is connected to an external circuit through the FPC 16 to transmit an electrical signal.
  • the two long sides facing the magnetic field reinforcing portion are symmetrically arranged with respect to the center line of the magnetic field reinforcing portion.
  • the driving force of the two coils 17 can be more uniformly applied to the vibrator.
  • the housing has a first projection 22 and the coil 17 is disposed on the first projection 22 on.
  • the lower case 10 protrudes into the cavity to form the first protrusion 22.
  • the coil 17 is disposed on the first projection 22 by bonding or laser welding. In this way, the gap between the first permanent magnet 14 and the coil 17 is smaller, enabling more magnetic lines of inductance to pass through the coil 17, thereby increasing the magnitude of the Lorentz force.
  • the elastic member is a spring piece 12.
  • the elastic piece 12 includes a first connecting portion 23 for connecting with the housing, a second connecting portion 25 for connecting with the vibrator, and a spring arm 24 located between the first connecting portion 23 and the second connecting portion 25, and the elastic arm 24 is Straight sheet.
  • a second boss portion 26 is provided on the upper case 11, and the first connecting portion 23 is welded to the second boss portion 26.
  • the second connecting portion 25 is directly connected to the weight portion.
  • the straight-shaped elastic arm 24 reduces the manufacturing difficulty of the elastic piece 12, and the structural strength of the elastic piece 12 is high.
  • the elastic arm 24 has a set oblique angle with the first connecting portion 23 and the second connecting portion 25.
  • the shrapnel 12 does not need to be subjected to large bending processing, which reduces damage during processing and improves service life.
  • the size of the elastic piece 12 in the axial direction is not limited and can have a larger length.
  • the stress and resonance frequency of the elastic piece 12 are low.
  • a person skilled in the art can set the thickness of the elastic piece 12 according to actual conditions.
  • the magnetic field reinforcement is the second permanent magnet 15.
  • the magnetization direction of the second permanent magnet 15 is perpendicular to the vibration direction.
  • two first permanent magnets 14 are arranged in parallel, and a second permanent magnet 15 is situated between the two first permanent magnets 14, the three being joined together to form a magnet assembly.
  • the magnet assembly is coupled to the weight portion.
  • the long side 29 of the first permanent magnet is parallel to the long side 31 of the second permanent magnet, and the short side 30 of the first permanent magnet is parallel to the short side 32 of the second permanent magnet.
  • the three are the same size to facilitate installation.
  • the magnetization direction of the second permanent magnet 15 is in the vertical direction
  • the magnetization direction of the first permanent magnet 14 is in the horizontal direction.
  • the magnetic field on the adjacent side of the two first permanent magnets 14 forms a pair of magnetization path structures such that the magnetic flux lines therebetween are in the vertical direction.
  • the N pole of the first permanent magnet 14 faces downward so that the magnetic intensities of two adjacent N poles are stronger.
  • a person skilled in the art can set the magnetization direction of the second permanent magnet 15 according to actual needs, as long as the magnetic induction intensity of the magnetic field on the adjacent side of the two first permanent magnets 14 can be enhanced.
  • the magnetic field reinforcement is made of a magnetically permeable material.
  • Magnetically conductive material The magnetic field can be magnetized, which can play the role of gathering magnetic lines, thereby enhancing the magnetic induction intensity.
  • the magnetic field reinforcing portion is the magnetic conductive block 33, and the material of the magnetic conductive block 33 is SUS-430.
  • the long side of the magnetic block 33 is parallel to the long side 29 of the first permanent magnet, and the short side of the magnetic block 33 is parallel to the short side 30 of the first permanent magnet.
  • the magnetic lines of interest on the adjacent sides are gathered by the magnetic block 33. In this way, the magnetic induction intensity is effectively enhanced.
  • the weight portion is made of a magnetically permeable material, and the magnetic field reinforcing portion and the weight portion are integrally formed.
  • the weight portion is the mass 13 and the mass 13 is made of SUS-430.
  • the magnetic block 33 is integrally formed with the mass 13.
  • the mass 13 and the magnetic conductive block 33 are integrally molded by pouring or punching.
  • Two first permanent magnets 14 are respectively disposed on both sides of the magnetic conductive block 33. In this way, the processing process is simplified, and the joint strength of the mass 13 and the magnetic conductive block 33 is higher.
  • the linear vibration motor also includes a pole core 20.
  • the coil 17 is disposed around the pole core 20, and the pole core 20 is in one-to-one correspondence with the coil 17.
  • the pole core 20 and the housing are made of a magnetically permeable material.
  • Each pole core 20 is coupled to a housing.
  • Each pole core 20 magnetizes a sidewall of the housing adjacent the pole core 20.
  • a magnetic force is formed between the side wall and the first permanent magnet 14. This magnetic force drives the vibrator to vibrate.
  • the coil 17 on the left side magnetizes the pole core 20 surrounded by it, wherein the side of the pole core 20 close to the lower casing 10 is an N pole. Due to the magnetic conduction of the upper case 11 and the lower case 10, the polarity of the first side wall 18 is N pole.
  • the coil 17 on the right side magnetizes the pole core 20 surrounded by it, wherein the side of the pole core 20 close to the lower casing 10 is an S pole. Due to the magnetic conduction of the upper case 11 and the lower case 10, the polarity of the second side wall 19 is the S pole. At this time, the direction of the Lorentz force F of the coil 17 to the vibrator is leftward.
  • the first side wall 18 is attractive to the magnetic force of the vibrator, which is to the left.
  • the second side wall 19 is a repulsive force to the magnetic force of the vibrator, and the repulsive force is to the left.
  • the directions of the three forces are the same, and the resultant force constitutes the driving force of the vibration of the vibrator.
  • the pole core 20 is strip-shaped, and the movement is welded to the lower casing 10 by laser welding, as shown in the figure. 6 is shown.
  • the pole core 20 is integrally formed with the housing.
  • the pole core 20 and the casing are integrally formed by pouring, stamping, or the like.
  • the pole core 20 is recessed inwardly from the casing.
  • the bottom case is formed of a sheet, and the convex portion 21 is formed by punching, and the convex portion 21 serves as the pole core 20, and the coil 17 is disposed around the pole core 20.
  • the processing steps are simplified.
  • the magnetic permeability between the pole core 20 and the casing is good.
  • the driving force of the vibrator vibration is further improved.

Landscapes

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

Abstract

La présente invention concerne un moteur à vibration linéaire comprenant un carter, un vibrateur, une bobine (17) et un élément élastique. Le carter comporte une cavité, et le vibrateur, la bobine (17) et l'élément élastique sont agencés dans la cavité. Le vibrateur est suspendu dans la cavité au moyen de l'élément élastique et comprend un premier aimant permanent (14), une partie de renforcement de champ magnétique et une partie poids, reliés entre eux. Un côté long (29) du premier aimant permanent, un côté long de la partie de renforcement de champ magnétique et un côté long (27) de la bobine sont parallèles à une direction d'axe long, respectivement, tandis que les côtés courts de ces derniers sont parallèles à une direction d'axe court, respectivement. Une pluralité de premiers aimants permanents (14) sont fournis, une direction de magnétisation est parallèle à une direction de vibration, et des côtés adjacents de premiers aimants permanents adjacents (14) possèdent la même polarité. Un espace est prévu entre les premiers aimants permanents (14) et la partie de renforcement de champ magnétique, et le côté long (27) de la bobine est opposé à la partie de renforcement de champ magnétique de telle sorte que le vibrateur vibre dans la direction d'axe court.
PCT/CN2017/089569 2017-03-23 2017-06-22 Moteur à vibration linéaire WO2018171060A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201710176641.6 2017-03-23
CN201710176641.6A CN106953492B (zh) 2017-03-23 2017-03-23 线性振动马达

Publications (1)

Publication Number Publication Date
WO2018171060A1 true WO2018171060A1 (fr) 2018-09-27

Family

ID=59472334

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2017/089569 WO2018171060A1 (fr) 2017-03-23 2017-06-22 Moteur à vibration linéaire

Country Status (2)

Country Link
CN (1) CN106953492B (fr)
WO (1) WO2018171060A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108566065A (zh) * 2018-04-10 2018-09-21 维沃移动通信有限公司 一种振动马达及移动终端
CN109309892B (zh) * 2018-10-16 2022-07-19 歌尔股份有限公司 电磁激励器以及屏幕发声装置
CN112243188B (zh) * 2019-07-19 2023-04-14 歌尔股份有限公司 换能器磁路结构、换能器及其电子设备

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07169074A (ja) * 1993-12-14 1995-07-04 Hitachi Metals Ltd 駆動装置
CN204392055U (zh) * 2015-01-16 2015-06-10 瑞声科技（南京）有限公司 振动电机
CN105356712A (zh) * 2015-11-25 2016-02-24 歌尔声学股份有限公司 线性振动马达
CN106100278A (zh) * 2016-07-21 2016-11-09 瑞声科技(新加坡)有限公司 线性振动电机
CN106300865A (zh) * 2016-08-24 2017-01-04 歌尔股份有限公司 线性振动马达
CN206023534U (zh) * 2016-08-16 2017-03-15 歌尔股份有限公司 谐振马达

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8013699B2 (en) * 2002-04-01 2011-09-06 Med-El Elektromedizinische Geraete Gmbh MRI-safe electro-magnetic tranducer
CN201789401U (zh) * 2010-09-01 2011-04-06 歌尔声学股份有限公司 扁平线性振动器
CN204597754U (zh) * 2015-05-07 2015-08-26 歌尔声学股份有限公司 扁平线性马达
CN205178826U (zh) * 2015-11-25 2016-04-20 歌尔声学股份有限公司 线性振动马达
CN107070159B (zh) * 2017-03-13 2019-09-17 歌尔股份有限公司 线性振动马达

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07169074A (ja) * 1993-12-14 1995-07-04 Hitachi Metals Ltd 駆動装置
CN204392055U (zh) * 2015-01-16 2015-06-10 瑞声科技（南京）有限公司 振动电机
CN105356712A (zh) * 2015-11-25 2016-02-24 歌尔声学股份有限公司 线性振动马达
CN106100278A (zh) * 2016-07-21 2016-11-09 瑞声科技(新加坡)有限公司 线性振动电机
CN206023534U (zh) * 2016-08-16 2017-03-15 歌尔股份有限公司 谐振马达
CN106300865A (zh) * 2016-08-24 2017-01-04 歌尔股份有限公司 线性振动马达

Also Published As

Publication number Publication date
CN106953492B (zh) 2020-02-18
CN106953492A (zh) 2017-07-14

Similar Documents

Publication Publication Date Title
CN109309892B (zh) 电磁激励器以及屏幕发声装置
CN109068244B (zh) 电磁激励器以及屏幕发声装置
WO2018036037A1 (fr) Moteur à vibration linéaire
US11515773B2 (en) Linear vibration motor and electronic device
WO2018058807A1 (fr) Moteur à vibration linéaire
US11245320B2 (en) Linear vibration motor
US20180236487A1 (en) Linear vibration motor
WO2018058808A1 (fr) Moteur à vibration linéaire et dispositif électronique
WO2017088359A1 (fr) Moteur à vibration linéaire
WO2021121055A1 (fr) Appareil de vibration
US10574126B2 (en) Linear vibration motor
CN107147267B (zh) 线性振动马达
WO2021128788A1 (fr) Dispositif de vibration et produit électronique
US20200412228A1 (en) Vibration motor
US10931185B2 (en) Linear vibration motor
WO2018171060A1 (fr) Moteur à vibration linéaire
WO2021000090A1 (fr) Moteur électrique à vibrations
WO2018166090A1 (fr) Moteur à vibration linéaire
US20200212775A1 (en) Linear Vibration Motor
CN206023534U (zh) 谐振马达
CN208821074U (zh) 电磁激励器以及屏幕发声装置
CN204967588U (zh) 线性振动马达
WO2018157515A1 (fr) Boîtier destiné à un moteur à vibration linéaire et moteur à vibration linéaire
CN207559830U (zh) 一种线性振动马达
CN114421730B (zh) 一种线性振动马达

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: 17902027

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: 17902027

Country of ref document: EP

Kind code of ref document: A1