WO2022000642A1 - Moteur à vibrations linéaires - Google Patents

Moteur à vibrations linéaires 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
English (en)
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/fr

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

Moteur à vibrations linéaires (100) qui comprend un boîtier (1), un ensemble bobine (2), une unité vibrante (3) et un élément de support élastique (4). Le boîtier (1) est pourvu d'une plaque inférieure (13) pour fixer l'ensemble bobine (2). L'unité vibrante (3) comprend un bloc de masse (31) comportant un trou de réception (3A) et une structure de circuit magnétique (33) fixée au trou de réception (3A) et formée de façon à présenter un entrefer magnétique (3B). L'ensemble bobine (2) est situé dans l'entrefer magnétique (3B). Le bloc de masse (31) comprend un panneau perforé (35) entourant le trou de réception (3A) et une surface externe (37) à l'opposé du panneau perforé (35). La structure de circuit magnétique (33) comprend un noyau polaire (331) et de l'acier magnétique (333). Le bloc de masse (31) comprend en outre un évidement (39) formé par retrait depuis le panneau perforé (35) et jusqu'à la surface externe (37). Le noyau polaire (331) comprend une partie plate (335) fixée à plat sur le côté de l'acier magnétique (333) à l'opposé de l'ensemble bobine (2), et des parties incurvées (337) qui sont respectivement incurvées et prolongées en direction de l'ensemble bobine (2) à partir des deux extrémités opposées, situées à proximité du panneau perforé (35), de la partie plate (335) ; et la partie plate (335) et les parties incurvées (337) viennent se loger, dans leur totalité, dans l'évidement (39). Le moteur à vibrations linéaires (100) selon la présente solution technique peut améliorer le flux magnétique dans l'entrefer magnétique (3B), faciliter l'assemblage des pièces, améliorer la précision d'assemblage et réduire le risque de bris lorsque le bloc de masse (31) tombe.
PCT/CN2020/104503 2020-06-28 2020-07-24 Moteur à vibrations linéaires WO2022000642A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202021221438.XU CN212381094U (zh) 2020-06-28 2020-06-28 线性振动电机
CN202021221438.X 2020-06-28

Publications (1)

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

Family

ID=74163884

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/104503 WO2022000642A1 (fr) 2020-06-28 2020-07-24 Moteur à vibrations linéaires

Country Status (2)

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

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN215580856U (zh) * 2021-06-25 2022-01-18 歌尔股份有限公司 一种线性振动马达
CN115085437B (zh) * 2021-12-06 2023-04-18 荣耀终端有限公司 振动马达和终端设备
CN218514266U (zh) * 2022-09-09 2023-02-21 瑞声光电科技(常州)有限公司 一种振动激励器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015112013A (ja) * 2015-02-20 2015-06-18 日本電産コパル株式会社 振動アクチュエータ、および携帯情報端末
JP2017184618A (ja) * 2017-07-06 2017-10-05 ミネベアミツミ株式会社 振動発生器
CN206878669U (zh) * 2017-05-26 2018-01-12 瑞声科技（南京）有限公司 振动电机
CN208589892U (zh) * 2018-08-03 2019-03-08 瑞声科技（南京）有限公司 振动电机
CN208589897U (zh) * 2018-08-03 2019-03-08 瑞声科技（南京）有限公司 线性振动电机

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015112013A (ja) * 2015-02-20 2015-06-18 日本電産コパル株式会社 振動アクチュエータ、および携帯情報端末
CN206878669U (zh) * 2017-05-26 2018-01-12 瑞声科技（南京）有限公司 振动电机
JP2017184618A (ja) * 2017-07-06 2017-10-05 ミネベアミツミ株式会社 振動発生器
CN208589892U (zh) * 2018-08-03 2019-03-08 瑞声科技（南京）有限公司 振动电机
CN208589897U (zh) * 2018-08-03 2019-03-08 瑞声科技（南京）有限公司 线性振动电机

Also Published As

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

Similar Documents

Publication Publication Date Title
US11784549B2 (en) Motor
US8987951B2 (en) Linear vibrator
US11211857B2 (en) Linear vibration motor having accommodation spaces provided for magnets in a support member
WO2022000642A1 (fr) Moteur à vibrations linéaires
US10674279B1 (en) Speaker
CN209390352U (zh) 发声器件
US11289990B2 (en) Linear vibration motor
US20220200427A1 (en) Linear Vibration Motor
US11309782B2 (en) Linear vibration motor
US11316419B2 (en) Linear vibration motor
WO2020140531A1 (fr) Moteur à vibration linéaire
WO2021000088A1 (fr) Moteur à vibrations
WO2022000643A1 (fr) Moteur électrique à vibration linéaire
CN110166902B (zh) 发声器件
WO2020134378A1 (fr) Moteur linéaire à vibrations
WO2020140546A1 (fr) Moteur électrique à vibrations
WO2020134379A1 (fr) Moteur à vibration linéaire
US10596593B2 (en) Vibration motor
WO2021237786A1 (fr) Moteur électrique à vibration linéaire
WO2020098426A1 (fr) Moteur électrique à vibrations
JP2023152596A (ja) 振動モータ
CN219477823U (zh) 线性振动马达
WO2022006837A1 (fr) Moteur linéaire
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