WO2011102588A1 - Linear vibration generating device - Google Patents

Linear vibration generating device Download PDF

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Publication number
WO2011102588A1
WO2011102588A1 PCT/KR2010/007599 KR2010007599W WO2011102588A1 WO 2011102588 A1 WO2011102588 A1 WO 2011102588A1 KR 2010007599 W KR2010007599 W KR 2010007599W WO 2011102588 A1 WO2011102588 A1 WO 2011102588A1
Authority
WO
WIPO (PCT)
Prior art keywords
generating device
vibration generating
linear vibration
magnet
coil
Prior art date
Application number
PCT/KR2010/007599
Other languages
English (en)
French (fr)
Inventor
Soon-Koo Shim
Young-Bin Chong
Original Assignee
Jahwa Electronics Co., Ltd.
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 Jahwa Electronics Co., Ltd. filed Critical Jahwa Electronics Co., Ltd.
Priority to CN201080064185.2A priority Critical patent/CN102859851B/zh
Publication of WO2011102588A1 publication Critical patent/WO2011102588A1/en

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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/04—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism
    • B06B1/045—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism using vibrating magnet, armature or coil system

Definitions

  • the present invention relates to a linear vibration generating device and more particularly, to a coin-type linear vibration generating device for use in a portable terminal.
  • a linear vibration actuator used as a mute receiver in a portable terminal has fast stop-start vibration characteristics due to a short stroke distance of a moving part and the elasticity of an elastic member. Therefore, the linear vibration actuator has contributed to production of slim portable terminals.
  • Such a linear vibration generating device typically includes a vibrator with a permanent magnet and a stator for supporting the vibrator. As the vibrator with the permanent magnet moves up and down through interaction between an electromagnetic force generated by applying current to a coil within the stator and a magnetic field generated from the permanent magnet, vibrations are generated.
  • a conventional linear vibration generating device has a stator with a coil and a vibrator with a permanent magnet within a case.
  • a yoke is provided to fix the permanent magnet.
  • an elastic member is provided to elastically support the yoke with the permanent magnet fixed therein and thus generate vibrations.
  • the vibrator may shake sideways due to the characteristics of the elastic member and residual vibrations.
  • shaking-caused contact between the permanent magnet and a metal component of a magnetic plate and the coil that creates an electromagnetic force may cause damage such as coil cutoff.
  • a weighting body is significant to generation of vibrations in the linear vibration generating device. Vibrations may be decreased if the weight of the weighting body is small.
  • the conventional linear vibration generating device 10 includes a vibrator 11 and a stator 12.
  • the vibrator 11 is provided with a yoke 110, a permanent magnet 111, and a weighting body 112, and the stator 12 is provided with an outer case 120, a bracket 121 and a coil 122.
  • the top and bottom of the vibrator 11 are supported by the outer case 120 and the bracket 121, respectively.
  • the permanent magnet 111 extends downward from the center of the yoke 110 and the weighting body 112 is provided around an outer circumferential surface of the yoke 110.
  • the permanent magnet 111 is placed coaxially with the coil 122, thus forming a magnetic path.
  • an elastic member 13 is interposed between the yoke 110 and the outer case 120, for supporting the vibrator 11 while the vibrator 11 is operating.
  • the elastic member 13 is installed between a ceiling surface of the outer case 120 and a top surface of the yoke 110, to thereby support the vibrator 11. That is, the vibrator 11 is supported by the bracket 121 and the outer case 120 supporting the elastic member 13 in the conventional linear vibration generating device 10.
  • a plate 113 is provided on a bottom surface of the permanent magnet 111 and a horizontal impact prevention portion 130 such as a magnetic fluid is provided at a place where magnetic force is concentrated.
  • Vertical impact prevention portions 131 and 132 are provided to function as dampers.
  • Reference numeral 122 denotes a Printed Circuit Board (PCB).
  • the above conventional linear vibration generating device has limitations in improving vibration characteristics because of its structure that makes it difficult to increase the volume of the weighting body.
  • the conventional linear vibration generating device decreases assembly performance in an assembly process such as coeccentricity management or coil soldering.
  • An aspect of exemplary embodiments of the present invention is to address at least the problems and/or disadvantages and to provide at least the advantages described below. Accordingly, an aspect of exemplary embodiments of the present invention is to provide a linear vibration generating device for improving vibration characteristics by changing a magnetic circuit.
  • Another aspect of exemplary embodiments of the present invention is to provide a linear vibration generating device for improving assembly performance by enabling all parts to be assembled/fixed in one direction.
  • Another aspect of exemplary embodiments of the present invention is to provide a linear vibration generating device for improving product reliability by arranging a yoke and a magnet that form a magnetic circuit only at one surface (in an open space) of a weighting body and thus maintaining a minimum gap between parts against vibrations generated during operation of a vibrator.
  • Another aspect of exemplary embodiments of the present invention is to provide a linear vibration generating device for improving vibration characteristics by arranging a yoke and a magnet that form a magnetic path only at one surface of a weighting body and thus easily securing an area at the other surface of the weighting body.
  • Another aspect of exemplary embodiments of the present invention is to provide a linear vibration generating device that can be fabricated to be thin through control of the thickness of a weighting body having a sufficient volume.
  • Another aspect of exemplary embodiments of the present invention is to provide a linear vibration generating device for improving assembly performance by engaging a vibrator with a stator and thus enabling coeccentricity management before assembly.
  • Another aspect of exemplary embodiments of the present invention is to provide a linear vibration generating device having an increased product lifetime by installing an impact prevention portion at a position where magnetic force is concentrated.
  • Another aspect of exemplary embodiments of the present invention is to provide a linear vibration generating device having a plate in which a step is formed to prevent impact during operation.
  • a further aspect of exemplary embodiments of the present invention is to provide a linear vibration generating device with increased product durability by overcoming coil cutoff.
  • a linear vibration generating device in which a stator includes a coil on a bracket, and a vibrator includes a yoke with a burring portion extended downward and a magnet for providing a magnetic circuit in conjunction with the yoke and providing a vibration force in conjunction with the coil.
  • a linear vibration generating device in which a vibrator includes a yoke and a magnet surrounding the yoke, for providing a donut-shaped magnetic circuit in conjunction with the yoke, and a stator includes a bracket, and a coil on the bracket, for providing a driving force in conjunction with the magnet.
  • the linear vibration generating device of the present invention improves vibration characteristics by changing a magnetic circuit.
  • the present invention is advantageous in that parts are kept apart from each other by a predetermined gap, assembly performance is increased, and product durability is increased.
  • parts can be arranged only at one surface of a weighting body, the weight of the weighting body can be increased, thereby improving vibration characteristics. Damage to a stator caused by tremors of a vibrator is prevented and an impact prevention portion is provided at a magnetic force-concentrated position. Hence, product lifetime is increased.
  • FIG. 1 is a sectional view illustrating the configuration of a conventional linear vibration generating device
  • FIG. 2 is a sectional view illustrating the configuration of a linear vibration generating device according to an exemplary embodiment of the present invention
  • FIG. 3 is an exploded sectional view of a vibrator in the linear vibration generating device illustrated in FIG. 2;
  • FIG. 4 is a sectional view illustrating the configuration of a linear vibration generating device according to another exemplary embodiment of the present invention.
  • FIG. 5 is a sectional view illustrating the configuration of a linear vibration generating device according to another exemplary embodiment of the present invention.
  • FIG. 6 is a sectional view illustrating the configuration of a linear vibration generating device according to a further exemplary embodiment of the present invention.
  • FIG. 7 is a sectional view of a magnetic circuit generated during an operation of the linear vibration generating device according to the present invention.
  • a linear vibration generating device 20 is provided at a predetermined position as a mute receiver in a portable terminal such as a cellular phone or a smart phone.
  • the linear vibration generating device 20 is a coin-type small-size, slim vibration motor.
  • the linear vibration generating device 20 includes a vibrator 21 and a stator 22.
  • the stator 22 is configured so as to support the whole weight of the vibrator 21.
  • the vibrator 21 includes a magnet and the stator 22 includes a coil.
  • the vibrator 21 includes a yoke 31 and a magnet 32 provided at the yoke 31.
  • the stator 22 includes an outer case 35, a bracket 36, and a coil 37.
  • the stator 22 and the vibrator 21 are relative concepts with respect to each other.
  • the stator 22 refers to a static part relative to the vibrator 21 and the vibrator 21 refers to a vibrating part relative to the stator 22.
  • the magnet 32 is installed at the yoke 31.
  • the yoke 31 and the magnet 32 collectively form a magnetic circuit.
  • a cylindrical burring portion 310 is extended downward from the center of the yoke 31, coaxially above the coil 37.
  • the cylindrical burring portion 310 forms an important magnetic path in conjunction with the magnet 32 and the coil 37.
  • the magnet 32, which is installed at the yoke 31, is a closed loop-shaped, preferrably ring-shape of surrounding the cylindrical burring portion 310, apart from an outer circumferential surface 313 of the cylindrical burring portion 310.
  • the outer case 35 forms the exterior of the linear vibration generating device 20, together with a bracket 36 which will be described later.
  • the outer case 35 is shaped into a simple cover and magnetic.
  • the bracket 36 is combined with a bottom of the outer case 35, supporting the whole weight of the vibrator 21 while the vibrator 21 is vibrating.
  • the coil 37 is provided together with the magnet 32 on the bracket 36, thereby providing a driving force.
  • the yoke 31 and the magnet 32 are arranged coaxially with the coil 37 (upon a central vibration axis), thus generating a vibration force.
  • the magnet 32 is shaped into a ring, it has a top surface 320, a bottom surface 321, an outer diameter surface 322, and an inner diameter surface 323.
  • the magnet 32 surrounds the burring portion 310, face to face, apart from an outer circumferential surface 313 of the burring portion 310.
  • the burring portion 310 is shaped into a cylinder extended downward from the center of the yoke 31.
  • the burring portion 310 passes through the center of the magnet 32.
  • the burring portion 310 faces downward above the inside upper portion of the coil 37, and the magnet 32 faces downward above the outside upper portion of the coil 37.
  • This structure makes the outer circumferential surface 313 of the burring portion 310 apart from the inner diameter surface 323 of the magnet 32, makes the outer circumferential surface 313 of the burring portion 310 apart from an inner diameter surface of the coil 37, and makes the inner diameter surface 323 of the magnet 32 apart from an outer diameter surface of the coil 37.
  • the yoke 31 is formed of a magnetic material.
  • the yoke 31 includes a horizontal extension portion 312 having a bottom surface 314 on which the magnet 32 is attached and the cylindrical burring portion 310 extended downward from the center of the horizontal extension portion 312, coaxially spaced from the coil 37, for creating a magnetic field in conjunction with the magnet 32.
  • the horizontal extension portion 312 and the burring portion 310 are fabricated integrally.
  • the burring portion 310 is hollow.
  • the top and bottom of the burring portion 310 may be opened or closed.
  • an outer diameter portion 315 of the horizontal extension portion 312 has a diameter equal to or larger than the outer diameter of the magnet 32, and the inner diameter of the magnet 32 is larger than the outer diameter of the burring portion 310.
  • a heavy weighting body 33 is provided at the permanent magnet 32 in the vibrator 21.
  • the weighting body 33 includes a disc-type upper portion 330 and a cylindrical hollow(ring-shaped) lower portion 331.
  • the upper portion 330 covers the tops of the magnet 32 and the yoke 31, and the lower portion 331 covers the magnet 32 and the yoke 31 along the outer circumferential direction thereof.
  • the weighting body 31 is opened only from one surface thereof, thus having an open space 332.
  • the top of the open space 332 is closed and the bottom thereof is opened. Especially, the yoke 31 and the magnet 32 are completely contained in the open space 332.
  • the open space 332 is shaped into a cylinder opened upward from a bottom surface 333 of the weighting body 33 and is brought into surface contact with the yoke 31 and a part of the magnet 32.
  • an inner diameter surface 334 of the weighting body 33 is in surface contact with the outer diameter surface 322 of the magnet 32 and with the outer diameter surface 315 of the horizontal extension portion 312.
  • the outer diameter surface 322 of the magnet 32 is formed of a non-magnetic material so that a magnetic circuit is concentrated toward the center of the linear vibration generating device 20.
  • the weighting body 33 covers even the top of the yoke 31 and has an expanded upper portion 330.
  • the structure of the weighting body 33 is effective for increasing the volume of the weighting body 33.
  • To increase the weight of the conventional weighting body its inner and outer diameters are increased.
  • the conventional weighting body is limited in increasing its weight.
  • a plate 34 is interposed between the magnet 32 and the bracket 36. Particularly, an elastic member 38 is further provided between the plate 34 and the bracket 36.
  • the plate 34 is installed on the bottom surface 321 of the magnet 32, in close contact with the elastic member 38.
  • the plate 34 is formed of a magnetic material, thus preventing magnetic leakage and forming a closed magnetic circuit. That is, because the plate 34 is formed of a magnetic material, a magnetic circuit created by the yoke 31 and the magnet 32 is concentrated toward the center in which the coil 37 is located.
  • the plate 34 has a circular or polygonal inner diameter portion 340.
  • An outer diameter portion 341 of the plate 34 has a diameter equal to or less than the outer diameter of the magnet 32.
  • the plate 34 includes a horizontal extension portion 342 in close surface contact with the bottom surface 321 of the magnet 32, a horizontal lower end portion 343 around the outer circumference of the coil 37, spaced from the coil 37, and an inclined connection portion 344 integrated between the horizontal extension portion 342 and the horizontal lower end portion 343.
  • the inclined connection portion 344 expands a space in which the vibrator 21 can vibrate up and down.
  • the inclined connection portion 344 is bent to prevent contact between the vibrator 21 and the elastic member 38 while the vibrator 21 makes a maximum displacement.
  • the horizontal extension portion 342 and the horizontal lower end portion 343 are shaped into rings and the diameter of the horizontal portion 342 is larger than the horizontal lower end portion 343.
  • the elastic member 38 is shaped into a semi-cone. Since the elastic member 38 has a larger diameter at a lower end portion 381 than at an upper end portion 380, the elastic member 38 is stably mounted on the bracket 36. An elastic force is generated in a direction in which the upper end portion 380 and the lower end portion 381 recede from each other, thereby bringing the plate 34 into close contact with the magnet 32 and keeping the upper end portion 380 in close surface contact with the horizontal lower end portion 343.
  • the elastic member 38 has an inner diameter portion facing the inner diameter portion of the plate 34 and an outer diameter portion facing the bracket 36. A plurality of connection portions are provided to connect the inner portion of the elastic member 38 to the outer portion thereof.
  • the bracket 36 has an inclined bent portion 360 to prevent contact that may be caused by the maximum displacement of the vibrator 21. That is, the bent portion 360 increases a vibration distance, thereby minimizing collision between the vibrator 21 and the stator 22.
  • FIG. 4 is a sectional view illustrating the configuration of a linear vibration generating device 40 according to another exemplary embodiment of the present invention.
  • the following description will focus on only the difference between the linear vibration generating device 20 illustrated in FIG. 2 and the linear vibration generating device 40. That is, the components of the linear vibration generating device 40 except horizontal impact prevention portions will not be described herein.
  • the linear vibration generating device 40 is provided with a first horizontal impact prevention portion 41 at a lower end of an inner diameter surface 420 of a permanent magnet 42, facing an outer circumferential surface 440 of a coil 44.
  • the first horizontal impact prevention portion 41 is formed of a magnetic fluid, grease or silicon along the lower end of the inner diameter surface 420 of the magnet 42.
  • the first horizontal impact prevention portion 41 may be formed into a ring or a plurality of spot coatings spaced from one another.
  • Grease or silicon is cheaper than a magnetic fluid, thus contributing to fabrication cost reduction.
  • a second horizontal impact prevention portion 45 is further provided on an inner diameter surface 430 of a plate 43.
  • the second horizontal impact prevention portion 45 is formed of a magnetic fluid, grease or silicon material along the inner diameter surface 430 of the plate 43.
  • the second horizontal impact prevention portion 45 may be formed into a ring or a plurality of spot coatings spaced from one another.
  • Grease or silicon is cheaper than a magnetic fluid, thus contributing to fabrication cost reduction.
  • the second horizontal impact prevention portion 45 may be formed over the inner diameter surface 430 of the plate 43 and an upper end of an elastic member 46. Therefore, the first and second horizontal impact prevention portions 41 and 45 prevent horizontal impacts during an operation of the linear vibration generating device 40, thus providing effective vibrations.
  • FIG. 5 is a sectional view illustrating the configuration of a linear vibration generating device 50 according to another exemplary embodiment of the present invention.
  • the following description focuses on only the difference between the linear vibration generating device 20 illustrated in FIG. 2 and the linear vibration generating device 50. That is, a detailed description of the components of the linear vibration generating device 50 illustrated in FIG. 5 except vertical impact prevention portions will not be provided herein.
  • the linear vibration generating device 50 further includes a first vertical impact prevention portion 52 on a ceiling surface 510 of an outer case 51.
  • the first vertical impact prevention portion 52 is formed of silicon or a foamed polymer and attached onto the ceiling surface 510 of the outer case 51 through one-surface attachment.
  • a second vertical impact prevention portion 55 is further provided on an inner bottom surface of a coil 53, specifically the inner bottom surface of the coil 53 on a bracket 54.
  • the second vertical impact prevention portion 55 is formed of silicon or a foamed polymer and attached onto the bottom surface 530 of the coil 53 through one-surface attachment.
  • the first and second vertical impact prevention portions 52 and 55 prevent vertical impacts during an operation of the linear vibration generating device 50, thereby providing vibrations effectively.
  • FIG. 6 is a sectional view illustrating the configuration of a linear vibration generating device 60 according to a further exemplary embodiment of the present invention. The following description focuses on only the difference between the linear vibration generating device 20 illustrated in FIG. 2 and the linear vibration generating device 60.
  • a yoke 61 in the linear vibration generating device 60, includes a horizontal extension portion 610 and a cylindrical burring portion 612.
  • a magnet 62 is provided on the horizontal extension portion 610.
  • An engagement guide groove 613 is formed into a ring on a bottom surface of the horizontal extension portion 610.
  • the engagement guide groove 613 enables accurate and fast engagement of the magnet 62 into the bottom surface of the horizontal extension portion 610.
  • a lower end portion 615 of the cylindrical burring portion 612 is closed.
  • the lower end portion 615 of the cylindrical burring portion 612 forms a magnetic circuit in conjunction with the magnet 62 and generates a driving force in conjunction with a coil 66.
  • the lower end portion 615 of the cylindrical burring portion 612 is formed to facilitate fabrication of the yoke 61.
  • the lower end portion 615 of the cylindrical burring portion 612 is placed over the inside of the coil 66 and moves up and down.
  • the outer diameter of the horizontal extension portion 610 is smaller than the inner diameter of an open space of a weighting body 64, thus defining a gap g between an outer diameter surface 614 of the horizontal extension portion 610 and an inner diameter surface 640 of the open space.
  • the gap g provides a space to be filled with an adhesive.
  • a plate 63 is interposed between the magnet 62 and an elastic member 67.
  • the plate 63 is formed of a magnetic material to thereby prevent magnetic leakage and concentrate a magnetic circuit toward the center.
  • An inner/outer diameter portion of the plate 63 is shaped into a circle or a polygon.
  • the outer diameter of the plate 63 is smaller than or equal to the outer diameter of the magnet 62 and the inner diameter of the plate 63 is smaller than or equal to the inner diameter of the magnet 62.
  • the yoke 61, the permanent magnet 62, and the plate 63 are completely contained in the inner space of the weighting body 64.
  • a horizontal impact prevention portion 68 is provided over an inner-diameter lower end portion of the magnet 62 and an inner diameter surface of the plate 63, facing an upper part of an outer circumferential surface of the coil 66.
  • the horizontal impact prevention portion 68 is formed of a magnetic fluid, grease or silicon material along the inner-diameter lower end of the magnet 62.
  • the horizontal impact prevention portion 68 may be formed into a ring or a plurality of spot coatings spaced from one another. This structure provides effective vibrations by preventing horizontal impacts on the coil 66 through the horizontal impact prevention portion 68 while the linear vibration generating device 60 is operating.
  • the coil 66 is provided with a coil soldering portion 72 on an outer surface of a substrate 70 on the bracket 69, for external electrical connection through the substrate 70.
  • Each of the substrate 70 and the bracket 69 has a connection opening to provide a path for electrical connection through external connection means.
  • the external connection means may include one of soldering, heat fusion, welding, and liquid soldering. A soldering line of the coil is drawn outward through the connection openings and the coil soldering portion 72 is formed on the outer surface of the substrate 70 using the drawn coil.
  • the substrate 70 may be a PCB.
  • the substrate 70 may be a flexible circuit board.
  • FIG. 7 is a sectional view of a magnetic circuit generated during an operation of the linear vibration generating device of the present invention.
  • a magnetic field from an N pole of a magnet 80 is directed toward a burring portion 812 through a horizontal extension portion 810 of a yoke 81 and a magnetic field from an S pole of the magnet 80 is directed toward a coil 83 in the magnetic circuit. Therefore, the magnetic circuit is donut-shaped due to the magnet 80 and the yoke 81, providing a driving force to a vibrator in conjunction with the coil 83 in the linear vibration generating device.
  • the present invention relates to a linear vibration generating device and more particularly, to a coin-type linear vibration generating device for use in a portable terminal.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
PCT/KR2010/007599 2010-02-18 2010-11-01 Linear vibration generating device WO2011102588A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201080064185.2A CN102859851B (zh) 2010-02-18 2010-11-01 线性振动产生装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2010-0014860 2010-02-18
KR1020100014860A KR100995000B1 (ko) 2010-02-18 2010-02-18 선형 진동 발생장치

Publications (1)

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WO2011102588A1 true WO2011102588A1 (en) 2011-08-25

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Application Number Title Priority Date Filing Date
PCT/KR2010/007599 WO2011102588A1 (en) 2010-02-18 2010-11-01 Linear vibration generating device

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KR (1) KR100995000B1 (ko)
CN (1) CN102859851B (ko)
WO (1) WO2011102588A1 (ko)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8872394B2 (en) 2011-06-16 2014-10-28 Jahwa Electronics Co., Ltd. Linear vibration generating apparatus
CN109462799A (zh) * 2018-12-29 2019-03-12 维沃移动通信有限公司 音频电信号转换组件、终端和音频电信号转换方法

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KR101235653B1 (ko) 2011-11-23 2013-02-21 자화전자(주) 선형 진동 발생장치
KR101265452B1 (ko) * 2012-03-26 2013-05-16 나영목 리니어 진동자
KR101516056B1 (ko) * 2012-12-06 2015-05-04 삼성전기주식회사 선형진동모터
WO2017003073A1 (ko) * 2015-07-02 2017-01-05 (주)파트론 진동 모터
CN105720775B (zh) * 2016-03-28 2019-08-20 歌尔股份有限公司 振动马达以及便携式设备
CN109907410A (zh) * 2019-04-03 2019-06-21 深圳市安泉科技有限公司 按摩振子及其控制方法和按摩腰带

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8872394B2 (en) 2011-06-16 2014-10-28 Jahwa Electronics Co., Ltd. Linear vibration generating apparatus
CN109462799A (zh) * 2018-12-29 2019-03-12 维沃移动通信有限公司 音频电信号转换组件、终端和音频电信号转换方法
CN109462799B (zh) * 2018-12-29 2021-05-25 维沃移动通信有限公司 音频电信号转换组件、终端和音频电信号转换方法

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Publication number Publication date
KR100995000B1 (ko) 2010-11-18
CN102859851B (zh) 2016-03-02
CN102859851A (zh) 2013-01-02

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