WO2021000087A1 - Moteur à vibrations - Google Patents

Moteur à vibrations Download PDF

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Publication number
WO2021000087A1
WO2021000087A1 PCT/CN2019/093983 CN2019093983W WO2021000087A1 WO 2021000087 A1 WO2021000087 A1 WO 2021000087A1 CN 2019093983 W CN2019093983 W CN 2019093983W WO 2021000087 A1 WO2021000087 A1 WO 2021000087A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnet
magnetic
group
magnetic steel
coil
Prior art date
Application number
PCT/CN2019/093983
Other languages
English (en)
Chinese (zh)
Inventor
毛路斌
张子洁
陈召宪
Original Assignee
瑞声声学科技(深圳)有限公司
瑞声科技(新加坡)有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 瑞声声学科技(深圳)有限公司, 瑞声科技(新加坡)有限公司 filed Critical 瑞声声学科技(深圳)有限公司
Priority to PCT/CN2019/093983 priority Critical patent/WO2021000087A1/fr
Priority to CN201921033473.6U priority patent/CN210167935U/zh
Publication of WO2021000087A1 publication Critical patent/WO2021000087A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/02—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/12—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moving in alternate directions by alternate energisation of two coil systems

Definitions

  • This application relates to the field of vibration motors, and in particular to a vibration motor.
  • a vibration motor is a component that uses the principle of electromagnetic force to convert electrical energy into mechanical energy.
  • the vibration motor is usually installed in a portable mobile device to generate vibration feedback, such as the vibration of a mobile phone or a game console.
  • the vibration motor usually only provides the driving force through the Lorentz force generated by the interaction between the coil and the magnetic field of the magnet to drive the vibrator to reciprocate.
  • the driving force of the above-mentioned vibration motor is relatively small, so the response time of vibration is relatively long long.
  • the vibration motor usually only provides the driving force through the Lorentz force generated by the interaction between the coil and the magnetic field of the magnet to drive the vibrator to reciprocate.
  • the driving force of the above-mentioned vibration motor is relatively small, so the response time of vibration is relatively long. long.
  • the purpose of this application is to provide a vibrating motor with a large driving force when the vibrator vibrates and a fast response speed.
  • the present application provides a vibration motor, including a housing with an accommodation space and a vibrator and a stator accommodated in the accommodation space.
  • the vibrator includes a magnetic circuit structure for vibration
  • the stator includes a structure for driving the magnetic circuit A vibrating coil.
  • the magnetic circuit structure includes a first magnetic steel group arranged on one side of the coil along a first direction, a second magnetic steel group arranged on the other side of the coil along a first direction, and The third magnetic steel group arranged on one side of the coil and the fourth magnetic steel group arranged on the other side of the coil along the second direction, wherein the first direction is parallel to the winding plane of the coil , The second direction is perpendicular to the winding plane of the coil, the first magnetic steel group and the second magnetic steel group are arranged symmetrically, and the third magnetic steel group is symmetrical to the fourth magnetic steel group
  • the first magnet group and the second magnet group both include a plurality of main magnets arranged in a row.
  • the main magnets are magnetized along the second direction, and the two adjacent main magnets
  • the magnetizing direction is opposite, the magnetizing direction of the main magnets in the first magnet group and the second magnet group are the same;
  • the third magnet group and the fourth magnet group include secondary magnets
  • the secondary magnet is magnetized along the first direction, and the magnetizing directions of the opposite secondary magnets in the third magnet group and the fourth magnet group are opposite.
  • the magnetic circuit structure further includes a magnetic conductive frame fixedly connected to the main magnetic steel, and the magnetic conductive frame includes a first magnetic conductive plate attached to the first magnetic steel group and attached to the main magnetic steel.
  • the second magnetic conductive plate of the second magnetic steel group, the first magnetic conductive plate is arranged on a side of the first magnetic steel group away from the second magnetic steel group, and the second magnetic conductive plate is arranged on The second magnetic steel group is away from one side of the first magnetic steel group.
  • the vibrator further includes a counterweight, the magnetic circuit structure is assembled in the counterweight, the counterweight is suspended in the containing space, and the counterweight includes two parallel and spaced apart And two short side walls arranged at both ends of the long side wall and connected to the two long side walls, the long side wall and the short side wall are connected end to end to form a receiving cavity, The magnetic conductive frame and the coil are accommodated in the containing cavity.
  • the first magnetic conductive plate is sandwiched between the first magnetic steel group and one of the long side walls
  • the second magnetic conductive frame is sandwiched between the second magnetic steel group and the other Between the long side walls.
  • the third magnetic steel and the fourth magnetic steel group are respectively fixed on the two short side walls.
  • both ends of the short side wall along the height direction of the housing are recessed and formed with clamping slots
  • the vibration motor further includes a limit block provided corresponding to the clamping slot, the limit block and the The housing is fixedly connected, and the card slot cooperates with the limiting block to limit the displacement of the vibrator.
  • the first magnet group includes a first main magnet and a second main magnet arranged at intervals, and the magnetizing direction of the first main magnet is opposite to the magnetizing direction of the second main magnet ;
  • the second magnet group includes a third main magnet and a fourth main magnet spaced apart, the magnetizing direction of the third main magnet is opposite to the magnetizing direction of the fourth main magnet;
  • the magnetizing direction of the first main magnet is the same as the magnetizing direction of the third main magnet, and the magnetizing direction of the second main magnet is the same as the magnetizing direction of the fourth main magnet.
  • the third magnet group includes a first auxiliary magnet
  • the fourth magnet group includes a second auxiliary magnet
  • the stator further includes a soft magnet fixedly connected to the coil, the coil is sleeved on the soft magnet, and the coil is fixedly connected to the housing.
  • the magnetic circuit structure of the vibration motor of the present application includes a soft magnet and a coil sleeved on the soft magnet, and a magnetic frame and a magnet are arranged on the circumference of the coil.
  • the second direction is magnetized, and the auxiliary magnet is magnetized along the first direction, and the first direction and the second direction are perpendicular, so that the vibrator can be respectively obtained in the first direction and the second direction
  • an electromagnetic force is generated, which is superimposed with the Lorentz force of the magnet to generate a driving force to drive the counterweight to vibrate, which increases the driving force and makes the response speed Faster, better vibration effect.
  • FIG. 1 is a schematic diagram of the three-dimensional structure of the vibration motor provided by this application.
  • FIG. 2 is a schematic diagram of an exploded structure of the vibration motor shown in FIG. 1;
  • Figure 3 is a cross-sectional view of the speaker shown in Figure 1 along the line III-III;
  • FIG. 4 is a front view of the vibration motor described in FIG. 1 without a top wall;
  • Fig. 5 is a schematic diagram of the magnetic circuit structure shown in Fig. 4;
  • Fig. 6 is a normalized magnetic induction intensity distribution diagram of the magnetic circuit structure shown in Fig. 5;
  • FIG. 7 is a vibration frequency domain analysis diagram of the vibration motor provided by this application.
  • the present application provides a vibration motor 100.
  • the vibration motor 100 includes a housing 1, a stator 2, a vibrator 3, and an elastic member 4.
  • the housing 1 includes a top wall 11, a bottom wall 13 opposite to the top wall 11, and a side wall 15 connecting the top wall 11 and the bottom wall 13.
  • the top wall 11, the bottom wall 13 and the side wall 15 cooperate to enclose a receiving space, and the vibrator 3, the stator 2 and the elastic member 4 are received in the receiving space.
  • the side wall 15 includes two long sides 151 arranged in parallel and spaced apart and two short sides 153 arranged at both ends of the long side 151 and connecting the two long sides 151.
  • the long side 151 and the short side The 153 can be formed in one piece, or it can be split-type design and fixed connection.
  • the top wall 11 and the side wall 15 are integrally formed, and the bottom wall 13 is directly covered on the side wall 15, which can facilitate the assembly of the vibration motor 100.
  • the side wall 15 may also be integrally formed with the bottom wall 13.
  • the stator 2 is fixed to the housing 1. Specifically, the stator 2 is fixed to the bottom wall 13.
  • the stator 2 includes a coil 21 and a soft magnet 22.
  • the central axis of the coil 21 is connected to the The extension directions of the short sides 153 are parallel.
  • the soft magnet 22 is made of iron-silicon alloy and has a columnar structure.
  • the coil 21 is sleeved on the outer circumference of the soft magnet 22. During installation, the coil 21 is inserted from one end of the soft magnet 22 to facilitate assembly and disassembly.
  • the coil 21 After the coil 21 is energized, the coil 21 and the soft magnetic body 22 cooperate to form an electromagnet.
  • the coil 21 generates a magnetic field to magnetize the soft magnetic body 22.
  • the magnetic fields of the coils 21 are superimposed on each other, so that the magnetic properties of the coils 21 are greatly increased.
  • the number of the stators 2 may be multiple, and the multiple stators 2 are arranged in a row along the long side 151, and the current directions of the coils 21 in the two adjacent stators 2 are opposite, the generated magnetic field The direction is also the opposite.
  • the magnetic fields generated by the coils 21 in the two or more stators 2 act on the vibrator 3 at the same time, which can increase the driving force and improve the vibration effect of the vibrator 3.
  • the vibrator 3 vibrates in a first direction and/or a second direction, wherein the first direction is parallel to the winding plane of the coil 21, that is, the direction shown by the X axis in FIG. 1 is the first direction.
  • Direction; the second direction is perpendicular to the winding plane of the coil 21, that is, the direction shown by the Y axis in FIG. 1 is the second direction.
  • the winding plane of the coil 21 is a plane corresponding to one turn of the coil 21.
  • the vibrator 3 includes a counterweight 31 and a magnetic circuit structure 33 assembled with the counterweight 31, and the counterweight 31 is suspended in the receiving space.
  • the magnetic circuit structure 33 is driven by the magnetic field of the coil 21 to generate vibration, and the counterweight 31 is used to enhance the vibration effect of the magnetic circuit structure 33.
  • the weight 31 includes two long side walls 311 arranged in parallel and spaced apart and two short side walls 313 arranged at both ends of the long side wall 311 and connecting the two long side walls 311.
  • the long side The wall 311 and the short side wall 313 are connected end to end to form a receiving cavity 315, and the stator 2 and the magnetic circuit structure 33 are both received in the receiving cavity 315.
  • the extending direction of the long side wall 311 is consistent with the extending direction of the long side 151
  • the extending direction of the short side wall 313 is consistent with the extending direction of the short side 153.
  • the long side wall 311 is spaced from the long side 151
  • the short side wall 313 is spaced from the short side 153.
  • the short side wall 313 is recessed at both ends of the height direction of the housing 1 to form a locking groove 3130, and the two locking grooves 3130 are symmetrically arranged at both ends of the short side wall 313.
  • the slot 3130 communicates with the receiving space, and the slot 3130 is disposed on the side of the short side wall 313 away from the receiving cavity 315.
  • the vibration motor 100 further includes a limit block 5 corresponding to the card slot 3130, and the limit block 5 is fixedly connected to the housing 1.
  • the slot 3130 cooperates with the limiting block 5 to limit the displacement of the vibrator 3 and avoid excessive vibration of the vibrator 3.
  • the number of the limiting blocks 5 is four, and the two limiting blocks 5 corresponding to the two grooves 3130 at the top of the short side wall 313 are fixedly connected to the top wall 11, and Two stop blocks 5 corresponding to the two grooves 3130 at the bottom end of the short side wall 313 are fixedly connected to the bottom wall 13.
  • the depth of the slot 3130 along the X-axis direction is the amount of vibration of the vibrator 3 in the first direction.
  • the magnetic circuit structure 33 includes a magnetic conductive frame 331 accommodated in the accommodating cavity 315, a first magnetic steel group 333 arranged on one side of the coil 21 along a first direction, and a first magnetic steel group 333 arranged on the coil along a first direction.
  • the second magnetic steel group 335 on the other side, the third magnetic steel group 337 arranged on one side of the coil 21 along the second direction, and the fourth magnetic steel group arranged on the other side of the coil 21 along the second direction 339.
  • the first magnetic steel group 333 and the second magnetic steel group 335 are arranged symmetrically, and the third magnetic induction group 337 and the fourth magnetic induction group 339 are arranged symmetrically.
  • the magnetic conductive frame 331 includes a first magnetic conductive plate 3311 attached to the first magnetic steel group 333 and a second magnetic conductive plate 3312 attached to the second magnetic steel group 335.
  • the first magnetic conductive plate 3311 is arranged on the side of the first magnetic steel group 333 away from the second magnetic steel group 335
  • the second magnetic conductive plate 3312 is arranged on the second magnetic steel group 335 away from One side of the first magnetic steel group 333.
  • the first magnetic conductive plate 3311 is sandwiched between the first magnetic steel group 333 and one of the long side walls 311, and the second magnetic conductive plate 3312 is sandwiched between the second magnetic steel group 335 and Between the other long side wall 311.
  • the magnetically permeable frame 331 may also have a rectangular frame-like structure, and it may also include a third magnetically permeable frame fixed to one end of the first magnetically permeable plate 3311 and connected to the second magnetically permeable plate 3312. Plate, fixed to the other end of the first magnetic conductive plate 3311 and connected to the fourth magnetic conductive plate of the second magnetic conductive plate 3312, the first magnetic conductive plate 3311, the third magnetic conductive plate, the The second magnetic conductive plate 3312 and the fourth magnetic conductive plate are connected end to end in sequence.
  • the first magnet group 333 and the second magnet group 335 both include main magnets arranged in multiple rows, and the main magnets are magnetized along the second direction, and are adjacent to each other.
  • the magnetizing directions of the main magnets are opposite, and the magnetizing directions of the main magnets corresponding to the positions in the first magnet group 333 and the second magnet group 335 are the same.
  • the third magnet group 337 and the fourth magnet group 339 include auxiliary magnets, and the auxiliary magnets are magnetized along the first direction.
  • the first magnet group 333 includes a first magnet 3331 and a second magnet 3332; the second magnet group 335 includes a third magnet 3351 and The fourth magnet 3352, wherein the magnetizing direction of the first magnet 3331 is opposite to the magnetizing direction of the second magnet 3332, and the magnetizing direction of the first magnet 3331 is the same as the magnetizing direction of the third and third magnets.
  • the magnetizing direction of the magnet 3351 is the same; the magnetizing direction of the fourth magnet 3352 is opposite to the magnetizing direction of the third magnet 3352.
  • the third magnet group 337 includes a first sub-magnet 3371; the fourth magnet group 339 includes a second sub-magnet 3391.
  • the magnetizing direction of the first sub-magnet 3371 is the same as that of the second sub-magnet.
  • the magnetizing direction of the magnet is opposite.
  • the side of the first main magnet 3331 close to the first magnetic conductive plate 3311 is an S pole, and the side far away from the first magnetic conductive plate 3311 is an N pole;
  • the side of the second main magnet 3332 close to the first magnetic conductive plate 3311 is an N pole, and the side far away from the first magnetic conductive plate 3311 is an S pole;
  • the side of the third main magnet 3351 close to the first magnetic conductive plate 3311 is an N pole, and the side far away from the first magnetic conductive plate 3311 is an S pole.
  • the side of the fourth main magnet 3352 close to the second magnetic conductive frame 3312 is an S pole, and the side far away from the second magnetic conductive frame 3312 is an N pole.
  • the side of the first secondary magnet 3371 away from the coil 21 is an S pole, and the side close to the coil 21 is an N pole;
  • the side of the second secondary magnet 3391 away from the coil 21 is an S pole, and the side close to the coil 21 is an N pole.
  • the coil 21 cooperates with the soft magnet 22 to form an electromagnet, which generates an electromagnetic force after being energized.
  • the magnetic circuit structure 33 generates a Lorentz force.
  • the superposition of the electromagnetic force and the Lorentz force pushes the vibrator 3 in
  • the vibration in the accommodating space is transmitted to the housing 1 through the elastic member 4 to drive the housing 1 to vibrate, and then the vibration motor 100 outputs a vibration sensation to the outside.
  • the vibration motor 100 outputs a vibration sensation to the outside.
  • the magnetically permeable frame 331 is made of permeable material, which plays a role of permeable magnetism, which can avoid the dispersion of magnetic lines of induction, strengthen the Lorentz force, and increase the vibration force.
  • the size increases the vibration effect of the vibration motor 100.
  • the elastic member 4 and the counterweight 31 and/or the connection place of the housing 1 are preferably provided with reinforcing welding tabs, which can not only enhance the bonding force of the elastic member 4, but also prevent the elastic member 4 from excessive bending Fold and break.
  • Figure 7 is a vibration frequency domain analysis diagram of the vibration motor provided by this application, where curve I is the vibration volume curve diagram of the vibration motor in the first direction, and curve II is the vibration motor
  • the graph of the amount of vibration in the second direction can be seen from FIG. 7 that after the coil 21 is energized, the vibrator 3 can vibrate in the X-axis direction and the Y-axis direction at the same time, that is, the vibrator 3
  • the vibration direction is the combined direction of the X-axis direction vibration and the Y-axis direction vibration.
  • the vibrator 3 vibrates obliquely with respect to the X-axis direction or the Y-axis direction; further, the coil 21 current
  • the vibrator 3 vibrates obliquely toward the X axis;
  • the current frequency of the coil 21 is equal to 150 Hz, the angle between the vibration direction of the vibrator 3 and the X axis direction/Y axis direction is 45°
  • the vibration of the vibrator 3 is at a relatively low level; when the current frequency of the coil 21 is greater than 150 Hz, the vibrator 3 vibrates in a direction close to the Y axis.
  • the vibration in the X-axis direction can be effectively excited under the frequency condition of 104 Hz
  • the vibration in the Y-axis direction can be effectively excited under the frequency condition of 181 Hz. Therefore, the vibration motor 100 provided in the present application can be operated at 104 Hz and 181 Hz, respectively. Get two kinds of shock.
  • the magnetic circuit structure of the vibration motor of the present application includes a soft magnet and a coil sleeved on the soft magnet, and a magnetic frame and a magnet are arranged on the circumference of the coil.
  • the second direction is magnetized, and the auxiliary magnet is magnetized along the first direction, and the first direction and the second direction are perpendicular, so that the vibrator can be respectively obtained in the first direction and the second direction
  • an electromagnetic force is generated, which is superimposed with the Lorentz force of the magnet to generate a driving force to drive the counterweight to vibrate, which increases the driving force and makes the response speed Faster, better vibration effect.

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

Abstract

La présente invention concerne un moteur à vibrations qui comprend une structure de circuit magnétique (33) et une bobine (21), la structure de circuit magnétique (33) comprenant un premier groupe d'aciers magnétiques (333) disposé sur un côté de la bobine (21) le long d'une première direction, un deuxième groupe d'aciers magnétiques (335) disposé de l'autre côté de la bobine (21) le long de la première direction, un troisième groupe d'aciers magnétiques (337) disposé sur un côté de la bobine (21) le long d'une seconde direction et un quatrième groupe d'aciers magnétiques (339) disposé de l'autre côté de la bobine (21) le long de la seconde direction, la première direction étant parallèle au plan d'enroulement de la bobine (21), la seconde direction étant perpendiculaire au plan d'enroulement de la bobine (21), le premier groupe d'aciers magnétiques (333) et le deuxième groupe d'aciers magnétiques (335) comprenant des aciers magnétiques principaux disposés en rangées, les aciers magnétiques principaux étant magnétisés dans la seconde direction, les directions de magnétisation des deux aciers magnétiques principaux adjacents étant opposées, les directions de magnétisation des aciers magnétiques principaux dont les positions sont opposées dans le premier groupe d'aciers magnétiques (333) et le deuxième groupe d'aciers magnétiques (335) étant identiques ; le troisième groupe d'aciers magnétiques (337) et le quatrième groupe d'aciers magnétiques (339) comprenant des aciers magnétiques secondaires, les aciers magnétiques secondaires étant magnétisés dans la première direction, les directions de magnétisation des aciers magnétiques secondaires dont les positions sont opposées dans le troisième groupe d'aciers magnétiques (337) et le quatrième groupe d'aciers magnétiques (339) étant opposées. Le moteur à vibrations présente une vitesse de réponse rapide et un effet de vibration amélioré.
PCT/CN2019/093983 2019-06-29 2019-06-29 Moteur à vibrations WO2021000087A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2019/093983 WO2021000087A1 (fr) 2019-06-29 2019-06-29 Moteur à vibrations
CN201921033473.6U CN210167935U (zh) 2019-06-29 2019-07-02 振动电机

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2019/093983 WO2021000087A1 (fr) 2019-06-29 2019-06-29 Moteur à vibrations

Publications (1)

Publication Number Publication Date
WO2021000087A1 true WO2021000087A1 (fr) 2021-01-07

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ID=69795120

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/093983 WO2021000087A1 (fr) 2019-06-29 2019-06-29 Moteur à vibrations

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CN (1) CN210167935U (fr)
WO (1) WO2021000087A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN215733687U (zh) * 2020-07-10 2022-02-01 瑞声科技（南京）有限公司 一种双向驱动磁路
CN213461492U (zh) * 2020-09-30 2021-06-15 瑞声科技(新加坡)有限公司 一种振动电机

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07131967A (ja) * 1993-11-01 1995-05-19 Yuichi Moriki 偏平コイル形リニア・アクチュエータ
CN106660073A (zh) * 2014-10-07 2017-05-10 日本电产科宝株式会社 线性振动马达
CN206524745U (zh) * 2017-01-20 2017-09-26 瑞声科技(新加坡)有限公司 线性振动电机
CN206834954U (zh) * 2017-01-20 2018-01-02 瑞声科技(新加坡)有限公司 线性振动电机
CN108988602A (zh) * 2017-05-30 2018-12-11 日本电产精密株式会社 振动马达以及触觉设备
CN110277890A (zh) * 2019-06-04 2019-09-24 瑞声科技（南京）有限公司 振动电机

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07131967A (ja) * 1993-11-01 1995-05-19 Yuichi Moriki 偏平コイル形リニア・アクチュエータ
CN106660073A (zh) * 2014-10-07 2017-05-10 日本电产科宝株式会社 线性振动马达
CN206524745U (zh) * 2017-01-20 2017-09-26 瑞声科技(新加坡)有限公司 线性振动电机
CN206834954U (zh) * 2017-01-20 2018-01-02 瑞声科技(新加坡)有限公司 线性振动电机
CN108988602A (zh) * 2017-05-30 2018-12-11 日本电产精密株式会社 振动马达以及触觉设备
CN110277890A (zh) * 2019-06-04 2019-09-24 瑞声科技（南京）有限公司 振动电机

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