WO2015069014A1 - Dispositif de génération de vibrations linéaires - Google Patents

Dispositif de génération de vibrations linéaires Download PDF

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Publication number
WO2015069014A1
WO2015069014A1 PCT/KR2014/010573 KR2014010573W WO2015069014A1 WO 2015069014 A1 WO2015069014 A1 WO 2015069014A1 KR 2014010573 W KR2014010573 W KR 2014010573W WO 2015069014 A1 WO2015069014 A1 WO 2015069014A1
Authority
WO
WIPO (PCT)
Prior art keywords
permanent magnet
elastic member
vibrating body
generating device
fixed
Prior art date
Application number
PCT/KR2014/010573
Other languages
English (en)
Korean (ko)
Inventor
심순구
정영빈
최남진
이민구
Original Assignee
자화전자(주)
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 자화전자(주) filed Critical 자화전자(주)
Publication of WO2015069014A1 publication Critical patent/WO2015069014A1/fr

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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
    • H02K33/16—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
    • 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
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
    • H02K7/065—Electromechanical oscillators; Vibrating magnetic drives

Definitions

  • the present invention relates to a linear vibration generating device, and more particularly, to a linear vibration generating device which generates vibration by causing a repetitive vertical movement of a weight body by interaction between an electric field generated by a coil and a magnetic field caused by a permanent magnet. .
  • an eccentric rotation type vibration generating device has been commonly used as a vibration generating device used as a receiving device in a portable terminal.
  • these technologies do not guarantee long lifespan, they are not responsive, and there are limitations in implementing various vibration modes, so that touch-type mobile phones aka 'touch phones' cannot meet the needs of consumers in a rapidly popularized trend. There is.
  • a linear vibration generator technology for generating vibration by linearly swinging a weight body has been proposed.
  • the proposed linear vibration generator uses the interaction between the electric field generated by the coil and the magnetic field of the permanent magnet surrounding the coil so that the desired vibration can be generated by linearly swinging the weight body.
  • Korean Patent No. 1180486 (published Sep. 6, 2012, hereinafter referred to as a 'prior patent document') discloses a technique for generating vibration by linearly oscillating a weight body under the name of 'linear vibration motor'. .
  • the technology proposed through the prior patent document is a technology that allows the device to be miniaturized while maintaining a stable operating characteristics by increasing the magnetic efficiency.
  • the linear weight body is largely divided into a vibrating body 115, a fixed body 110, and a case 135 and 102.
  • the vibrating body 115 is composed of a magnet 111 for forming a magnetic field and a weight body 112 surrounding the vibrating body, and the fixing body 110 is around the yoke 107 and the yoke 107 in the center of the lower case 102. It consists of the coils 106 arranged.
  • a PCB 105 is disposed in electrical contact with the coil 106 to transmit an electrical signal provided to the outside to the coil, and the upper case 135 and the weight body 112 or
  • An elastic member 120 is interposed between the lower case 102 and the weight body 112 to elastically support the vibrating body 115 and to limit the amplitude to a predetermined width.
  • the permanent magnet is seated in a form in which one surface of the magnet is covered on a stepped portion (not shown) integrally formed on the inner circumferential surface of the weight body 112, and the vibrating body 115 of the
  • the damper 140 is attached to one surface of the upper case 135 facing the upper surface to block the vibrating body 115 from contacting the case 135.
  • the structure of the spring driving part (also called 'spring foot') was intricately constructed. There is a problem that is accompanied by difficulties in securing competitiveness in the.
  • the outer edge of the vibrating body (see 'A' in the drawing) is formed by the left and right shaking, that is, the pitching movement, which occurs along with the vertical movement of the vibrating body. Due to the noise caused by the direct contact to the there is a problem that greatly reduces the quality and reliability of the product.
  • the problem to be solved by the present invention is to provide a linear vibration generating device that can simplify the pattern of the drive unit of the elastic member.
  • Another problem to be solved by the present invention is to implement a linear vibration generating device capable of effectively reducing the mechanical contact between the components due to the vibrating body pitching motion and the resulting noise.
  • a fixture including a coil seated on an upper surface of the bracket
  • a vibrating body including an annular weight body having a stepped portion formed on an inner circumferential surface thereof, and a permanent magnet seated in a form in which one surface is covered on the stepped portion of the weighted body;
  • An elastic member disposed between the fixed body and the vibrating body to elastically support the vibrating body
  • the elastic member provides a linear vibration generating device characterized in that the permanent magnet is fixed directly to the opposite side of the stepped surface in contact with the permanent magnet.
  • the damping means is provided on at least one surface of the permanent magnet exposed surface of the opposite side of the step or the fixed body facing the exposed surface, it may further include.
  • the damping means provided on the exposed surface of the permanent magnet may include a magnetic fluid.
  • the inner circumferential surface of the step may be configured to protrude further into the inner circumferential surface of the permanent magnet or be located on the same line as the inner circumferential surface of the permanent magnet.
  • the fixed end inner circumferential surface of the elastic member in contact with the step may be configured to be aligned with the inner circumferential surface of the step.
  • the fixing body may further include a case of a magnetic material that is coupled to the bracket to form an inner space for mounting the vibrating body and the elastic member.
  • the fixing body may further include a yoke fixed to the bracket and mounted to the inner diameter of the coil.
  • the yoke may be a cylindrical magnetic material having a T-shaped or + -shaped cross section.
  • the other end (outside fixing end) of the elastic member may be fixed to the upper surface of the bracket or the case facing the opposite side of the step surface that the permanent magnet is in contact.
  • it may further include a pitching impact preventing means disposed on the fixture to face the weight on the opposite side of the step.
  • the weight upper edge or the corner may further include a recess formed to correspond to the pitching impact preventing means.
  • the gap between the outer fixing end and the inner fixing end of the elastic member respectively connected to the case and the vibrating body It can be sufficiently secured, and the length of the spring driving part (“spring foot”) connecting the outer fixed end and the inner fixed end can be sufficiently extended.
  • the stepped body is integrally formed on the weight body to cover one surface of the permanent magnet, and at the same time, the case is made of a magnetic material, so that the vibration is effective without the plate generally applied in other conventional arts to concentrate the magnetic flux of the permanent magnet. It is possible to implement a vibration generating device that can exhibit performance, and can eventually achieve device miniaturization with improved performance.
  • the pitching impact prevention means disposed on one surface of the case facing the outer edge of one side of the weight body can reduce mechanical contact between the components (weight and stationary body) due to the vibrating body pitching motion and the noise thereof. As a result, it is possible to implement a high-quality vibration generator with high reliability that can exhibit a stable vibration characteristics.
  • FIG. 1 is a cross-sectional view of a linear vibration generating device according to the prior art.
  • FIG. 2 is an exploded perspective view of a linear vibration generating device according to a first embodiment of the present invention.
  • FIG. 3 is a cross-sectional view of the linear vibration generating device shown in FIG.
  • FIG. 4 is a sectional view showing a modification according to the first embodiment of FIG.
  • FIG. 5 is a cross-sectional view showing another modification according to the first embodiment of FIG.
  • FIG. 6 is an exploded perspective view of a linear vibration generating device according to a second embodiment of the present invention.
  • FIG. 7 is a cross-sectional view of the linear vibration generating device shown in FIG.
  • FIG. 8 is a cross-sectional view showing a modification according to the second embodiment of FIG.
  • FIG. 9 is a sectional view showing another modification example according to the second embodiment of FIG.
  • FIG. 2 is an exploded perspective view of the linear vibration generating device according to the first embodiment of the present invention
  • FIG. 3 is a sectional view of the linear vibration generating device shown in FIG. The overall configuration of the linear vibration generating device according to the present invention will be described first with reference to these drawings.
  • the linear vibration generating apparatus is largely composed of a vibrating body 10 and the fixed body 20.
  • An elastic member 40 is interposed between the vibrating body 10 and the fixed body 20 to elastically support the vertical movement of the vibrating body 10, and vibrates on the plate-shaped bracket 34 constituting the fixed body 20.
  • the PCB 50 is provided to provide the AC power for generation to the fixture 20.
  • the vibrating body 10 is composed of a permanent body 12 to form a magnetic field and a weight body 13 combined with a form surrounding the outer edge of the permanent magnet 12 to impart a weight.
  • the fixed body 20 is mounted on the bracket 34, a cylindrical coil 22 seated on an upper surface of the bracket 34 and disposed in the center of the permanent magnet 12, and mounted on an inner diameter portion of the coil 22. It consists of the yoke 24 and the case 30.
  • the coil 22 is electrically connected to the PCB 50 disposed on the bracket 34 to receive an electrical signal to vibrate the vibrating body 10 with respect to the fixture 20, and to receive the received electrical signal.
  • the vibrating body 10 moves up and down with respect to the fixed body 20 by the attractive force and the repulsive force between the electric field generated by the coil 22 and the magnetic field generated by the permanent magnet 12. Move to generate vibration.
  • the amplitude of the vibrating body 10 in the case 30 may be limited to an appropriate range by the elastic modulus of the elastic member 40 and the attractive force acting between the permanent magnet 12 and the yoke 24.
  • the permanent magnet 12 may be an annular shape, that is, a donut-shaped magnet having an inner diameter such that interference with the yoke 24 is not generated and having polarities opposite to each other in the vertical direction.
  • the amplitude of the vibrating body 10 may be limited to an appropriate range by the elastic modulus of the elastic member 40 and the attractive force acting between the permanent magnet 12 and the yoke 24, the permanent magnet ( 12 may be formed in an annular shape, that is, a donut shape, having an inner diameter such that interference with the yoke 24 does not occur, and having a polarity opposite in the vertical direction.
  • the yoke 24 may be provided in the form of a cylinder having a simple cylinder or a plate-shaped shield covering the upper portion of the coil 22 in a T-shaped or + -shaped cross section.
  • the magnetic flux generated from the permanent magnet 12 is concentrated to the coil 22 wound around the outer edge of the magnetic material, and the attraction force is formed with the permanent magnet 12 to form an amplitude of the vibrating body 10. It plays a role of limiting.
  • the yoke in a T-shape, and the ease of assembly in view of the yoke holding aspect in the process of moving the yoke, which is provided in a relatively small size, to an assembly target part. Considering this, it is advantageous to construct a + shape.
  • a stepped portion 16 is formed on the inner circumferential surface of the weight body 13, and the stepped portion 16 is seated in a form in which one surface of the permanent magnet 12 is covered.
  • the step 16 is disposed to be deflected below the inner circumferential surface of the weight 13 so as to completely cover the lower surface of the permanent magnet 12 and to seat the permanent magnet 12.
  • the weight body 13 cannot form a magnetic path made of a non-magnetic material with a tungsten alloy, but by adding Fe particles to the tungsten alloy to have magnetic properties, the magnetic shield functions to concentrate the magnetic flux of the permanent magnet 12 toward the coil 22 side. Can also be provided.
  • Step 16 is provided integrally on the inner circumferential surface of the weight body 13 to vibrate up and down with the permanent magnet 12, the weight body 13 when the vibrating body 10 vibrates in the vertical direction, vibrating
  • the elastic member 40 is disposed between the sieve 10 and the bracket 34 to elastically support the up and down vibration of the vibrating body 10 with respect to the fixed body 20 and to limit the amplitude thereof.
  • the elastic member 40 elastically supports the vibrating body 10 composed of the permanent magnet 12 and the weight body 13 vibrating up and down to restore the elastic force for restoring the position of the vibrating body 10 with respect to the fixed body 20.
  • the vibration of the vibrating body 10 is limited to the amplitude of the vibrating body 10 consisting of the permanent magnet 12 and the weight body 13 to collide with the case 30 constituting the fixed body 20 prevent.
  • One end (inner fixing end, 44) of the elastic member 40 is directly fixed to the opposite side of the surface of the step 16 in contact with the permanent magnet 12, the other end (outer fixing end, 42) is the bracket 34 A)
  • the upper surface is fixed by welding to the edge.
  • one end and the other end of the elastic member are fixed to the top step and the upper case facing the upper step.
  • the length of the driving unit (aka 'spring foot', 43) of the elastic member connecting the outer fixing end 42 and the inner fixing end 44 of the member 40 can be made as long as possible to simplify the pattern of the driving unit 43. Can be.
  • the case 30 constituting the fixed body 20 is combined with the bracket 34 to form an inner space in which the vibrating body 10 and the elastic member 40 may be mounted.
  • the case 30 is not particularly limited as long as it is a magnetic material (eg, a metal material), and has a width and a height capable of mounting a vibrating body, an elastic member, and a coil. Can be formed.
  • the PCB 50 inputs an electrical signal provided from the outside to the coil 22 and is electrically connected to the coil wire drawn out from the coil 22 for this purpose.
  • the PCB 50 is provided in an annular shape as shown in FIG. 2 so that the yoke 24 mounted in the coil 22 and the coil inner diameter portion directly contacts the bracket 34 or the base 34 therein. It can be fixed in the form of being coupled to the central coupling hole.
  • the damping means may be a magnetic fluid, and the positional contact is suppressed by directly contacting the magnet exposed surface.
  • the damping means 60-2 has a case 30 in which the exposed surface of the permanent magnet 12 opposite to the step 6 faces. It may be a configuration attached to one side of the).
  • the damping means 60-2 may include a damper made of rubber, silicon, and porous rubber.
  • damping means 60-3 and 60-both on the exposed surface of the permanent magnet 12 opposite the step 16 and on one surface of the upper case 32 facing the exposed surface. 4) may be provided.
  • a magnetic fluid is used for the damping means 60-3 of the exposed surface
  • a damper made of rubber or silicon is used for the damping means 60-4 of the surface facing the exposed surface.
  • the reference numeral 70 is disposed on the bracket 34 inside the elastic member 40 so that the elastic member 40 and the bracket are elastically deformed during the vertical movement of the vibrator 10.
  • a shock absorbing material to prevent mechanical contact between the materials a material capable of absorbing / mitigating the impact when the vibrating body 10 is touched, for example, rubber, silicone, and porous rubber ) May be used.
  • FIG. 6 is an exploded perspective view of the linear vibration generating device according to the second embodiment of the present invention
  • FIG. 7 is a cross-sectional view of the linear vibration generating device shown in FIG. 6.
  • the step 18 is disposed to be deflected above the inner circumferential surface of the weight body 13.
  • the permanent magnet 12 is seated so that the upper surface is covered, and the elastic member 40 is directly fixed to a surface opposite to the stepped surface where the permanent magnet 12 is in contact (in the figure, the upper step side of the vibrating body).
  • the second embodiment of FIGS. 6 and 7 is configured such that the upper surface of the step 18 faces one surface of the upper case 32 by inverting the vibrating body 10 of the case of the first embodiment up and down.
  • the elastic member 40 is positioned between the case 18 and the case 30, and the exposed surface of the permanent magnet 12 opposite the step 18 is directed toward the bottom of the case, that is, the bracket 34.
  • the step 13 formed on the inner circumferential surface of the weight 13 completely covers the upper surface of the permanent magnet 12.
  • the permanent magnet 12 is fixed to the inside seat.
  • the elastic member 40 is disposed between the step 18 and the case 30 to elastically support the vertical vibration of the vibrating body 10.
  • Step 18 is formed integrally projecting on the inner peripheral surface of the weight body 13 as in the first embodiment by vibrating together with the permanent magnet 12 and the weight body 13 during the vertical vibration of the vibrating body 10
  • the inner circumferential surface I2 may further protrude into the inner circumferential surface I1 of the permanent magnet 12 or may be provided in the same longitudinal direction as the inner circumferential surface I1 of the permanent magnet 12.
  • One end (inner fixing end, 44) of the elastic member 40 is directly fixed to the opposite side of the step 16 faced by the permanent magnet 12, and the other end (outer fixing end, 42) of the opposing part is the case 30. ) It is fixed on one side.
  • the outer side The length of the driving unit (aka 'spring foot', 43) of the elastic member connecting the fixed end 42 and the inner fixed end 44 can be made as long as possible in a limited space to simplify the elastic member.
  • Damping means (80-1) is provided on the exposed surface of the permanent magnet 12 opposite to the surface in contact with the step 18, that is, the upper surface of the permanent magnet.
  • the damping means 80-1 may be a magnetic fluid, and a central portion contacting the case may be provided in a convex form.
  • the damping means 80-2 is a rubber or silicon attached to one surface of the case 30 facing the permanent magnet exposed surface opposite to the surface facing the step 18.
  • damping means 80-3 and 80-4 are provided on both the exposed surface of the permanent magnet 12 and the upper surface of the case 30 facing the permanent magnet 12, the first embodiment described above.
  • magnetic fluid may be used for the damping means 80-3 provided on the exposed surface, and the damping means 80-4 provided on one surface of the case 30 facing the exposed surface may be made of rubber or silicon. It may be a damper.
  • the elastic member is directly fixed to the opposite side of the step surface that the permanent magnet is in contact
  • the outer fixed end and the inner side of the elastic member connected to the case and the vibrating body respectively
  • the gap between the fixed ends can be sufficiently secured, and the length of the spring driving unit (also known as a 'spring foot') connecting the outer fixed end and the inner fixed end can be sufficiently increased.
  • the stepped body is integrally formed on the weight body to cover one surface of the permanent magnet, and at the same time, the case is made of a magnetic material, so that the vibration is effective without the plate generally applied in other conventional arts to concentrate the magnetic flux of the permanent magnet. It is possible to implement a vibration generating device that can exhibit performance, and can eventually achieve device miniaturization with improved performance.
  • the linear vibration generators according to the third and fourth embodiments shown in FIGS. 10 and 11 are opposite to the step 16 and 18, in addition to the linear vibration generators according to the first and second embodiments described above, respectively.
  • pitching impact preventing means (90, 92) on the fixing body (20) facing the weight body 13 of the, it is possible to prevent the impact due to the pitching (pitching) movement of the vibrating body (10) It is characteristic.
  • one side edge or corner of the weight 13 further includes recesses 14 and 15 adapted to correspond to the pitching impact preventing means 90 and 92.
  • the application of the recesses 14 and 15 may solve the problem of amplitude loss due to the application of the pitching impact preventing means 90 and 92 in a limited space.
  • the present invention can be used as a vibration generating device used as a receiving device in a portable terminal.

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

Abstract

Le dispositif de génération de vibrations linéaires selon la présente invention comprend : un corps fixe, comprenant une bobine disposée sur la surface supérieure d'une ferrure ; un corps vibrant, comprenant une masse en forme d'anneau sur la surface périphérique interne de laquelle est formée une partie en escalier, et un aimant permanent qui est disposé de façon à recouvrir une surface de la partie en escalier de la masse ; et un élément élastique, qui est disposé entre le corps fixe et le corps vibrant, et qui supporte de manière élastique le corps vibrant. L'élément élastique est formé de façon à être directement fixé au côté inverse de la surface en escalier du côté touché par l'aimant permanent.
PCT/KR2014/010573 2013-11-07 2014-11-05 Dispositif de génération de vibrations linéaires WO2015069014A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2013-0134891 2013-11-07
KR1020130134891A KR20150053106A (ko) 2013-11-07 2013-11-07 선형 진동 발생장치

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WO2015069014A1 true WO2015069014A1 (fr) 2015-05-14

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KR (1) KR20150053106A (fr)
WO (1) WO2015069014A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106849590A (zh) * 2017-02-08 2017-06-13 维沃移动通信有限公司 一种线性马达和电子设备
CN107623424A (zh) * 2016-07-15 2018-01-23 Mplus株式会社 线性振动马达
WO2021035825A1 (fr) * 2019-08-28 2021-03-04 领先科技(东台)有限公司 Moteur linéaire vertical ayant une culasse d'aimant à bride emboîtée dans une bobine

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KR101695828B1 (ko) 2016-08-18 2017-01-13 자화전자(주) 댐퍼를 포함하는 선형 진동 발생장치 및 댐퍼
KR101856461B1 (ko) * 2016-11-08 2018-05-10 주식회사 씨케이머티리얼즈랩 촉각 액추에이터
KR101969441B1 (ko) * 2017-08-25 2019-04-16 주식회사 엠플러스 진동자의 워블로 인한 충격감소 구조를 포함하는 선형 진동발생장치.
KR102127981B1 (ko) * 2018-10-26 2020-06-29 (주)파트론 진동 모터
KR102438914B1 (ko) * 2020-07-17 2022-09-01 주식회사 엠플러스 저온 환경에서도 높은 진동력을 유지하는 선형 진동 액츄에이터

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107623424A (zh) * 2016-07-15 2018-01-23 Mplus株式会社 线性振动马达
CN107623424B (zh) * 2016-07-15 2019-05-10 Mplus株式会社 线性振动马达
CN106849590A (zh) * 2017-02-08 2017-06-13 维沃移动通信有限公司 一种线性马达和电子设备
WO2021035825A1 (fr) * 2019-08-28 2021-03-04 领先科技(东台)有限公司 Moteur linéaire vertical ayant une culasse d'aimant à bride emboîtée dans une bobine

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