KR20110101516A - Vibration motor - Google Patents

Vibration motor Download PDF

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Publication number
KR20110101516A
KR20110101516A KR1020100020549A KR20100020549A KR20110101516A KR 20110101516 A KR20110101516 A KR 20110101516A KR 1020100020549 A KR1020100020549 A KR 1020100020549A KR 20100020549 A KR20100020549 A KR 20100020549A KR 20110101516 A KR20110101516 A KR 20110101516A
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KR
South Korea
Prior art keywords
case
coil
shaft
magnet
end
Prior art date
Application number
KR1020100020549A
Other languages
Korean (ko)
Inventor
박영일
Original Assignee
엘지이노텍 주식회사
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 엘지이노텍 주식회사 filed Critical 엘지이노텍 주식회사
Priority to KR1020100020549A priority Critical patent/KR20110101516A/en
Publication of KR20110101516A publication Critical patent/KR20110101516A/en

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Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J37/00Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
    • H01J37/32Gas-filled discharge tubes, e.g. for surface treatment of objects such as coating, plating, etching, sterilising or bringing about chemical reactions
    • H01J37/32009Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources
    • H01J37/32018Glow discharge
    • H01J37/32036AC powered
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/34Reciprocating, oscillating or vibrating parts of the magnetic circuit
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K21/00Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/38Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating flux distributors, and armatures and magnets both stationary
    • H02K21/44Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating flux distributors, and armatures and magnets both stationary with armature windings wound upon the magnets
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K33/00Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/02Motors 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
    • H02K33/10Motors 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 wherein the alternate energisation and de-energisation of the single coil system is effected or controlled by movement of the armatures
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K7/00Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/06Means for converting reciprocating motion into rotary motion or vice versa
    • H02K7/075Means for converting reciprocating motion into rotary motion or vice versa using crankshafts or eccentrics

Abstract

Vibration motor of the present invention is a case having a cylindrical shape, a coil wound along the inner surface of the case, a power supply unit electrically connected to the coil and providing AC power to the coil, the shaft disposed inside the case and the coil on the outer peripheral surface of the shaft A vibrator disposed to face the magnetic field, the magnet including a magnet for linearly reciprocating the shaft along a longitudinal direction of the shaft by working with a magnetic field of the coil; And a fixing member for sealing one end of the case.

Description

Vibration Motors {VIBRATION MOTOR}

The present invention relates to a vibration motor.

A personal portable terminal, for example, a mobile phone, is equipped with an incoming signal generator for generating various incoming signals so that a selected incoming signal is generated when a call comes to the mobile phone or an incoming voice and text message is received so that the user can know it.

The incoming signal generator mounted in the personal portable terminal includes a sound generator for generating a bell sound, an illumination device for turning on an illumination, and a vibration generator for generating vibration.

The vibration generating device uses various types of vibration motors as vibration sources, and is classified into coin type and cylindrical bar type according to the shape of the vibration motor.

The bar type vibration motor is composed of a fixed part, a rotating part and a power supply part.

The fixing part includes a case and a magnet. The case may include a first case having an empty space formed therein and having a second side extending from the other end of the first case to the inside of the first case and having a concentric hole with the first case. The magnet is disposed on the outer circumferential surface of the second case.

The rotating part is spaced apart from the magnet and is disposed between the magnet and the inner circumferential surface of the first case, and a coil generating a rotational force by an electromagnetic force generated by the interaction with the magnet, a rotating shaft fitted into the shaft hole of the second case, and one side end of the rotating shaft. The oscillator is disposed, and a fixed body disposed on the other end of the rotating shaft to connect the rotating shaft and the coil, the rectifier is disposed on one surface of the fixed body and divided into a plurality of segments and electrically connected to the coil.

The power supply unit includes a base coupled to one open side of the first case and a brush disposed on the base to contact the commutator. It is disposed on one side of the base facing the and includes a brush in contact with the commutator.

However, in recent years, the size of portable terminals has become smaller and the thickness has become thinner. However, in the case of the bar type vibration motor described above, the size of the vibration motor is increased because the brush is built in the case, and thus the mounting area of the portable terminal is increased. Problems arise.

In addition, when the brush is used for a long time, there is a problem that the brush is worn and the life of the vibration motor is shortened.

In addition, the vibration motor that generates vibration by the rotational force of the rotating unit and the weight of the vibrator has a problem that the distribution of the rotation speed is largely generated in the same power source, which can not control the accurate vibration force.

Here, the vibration force is determined by the weight of the vibrator and the rotational speed. Since the weight of the vibrator is extremely small compared to the rotational speed of the rotating shaft, the distribution of the vibrational force is determined by the distribution of the rotational speed.

In addition, the magnet to rotate the rotating shaft by generating an electromagnetic force with the coil is expensive, there is a problem that can not reduce the size of the expensive magnet to increase the manufacturing cost of the product. That is, in order to reduce the size of the magnet, the thickness of the magnet should be increased or the length of the magnet should be reduced, but the thickness of the magnet cannot be increased because the coil rotates between the magnet and the first case. In addition, it is impossible to reduce the length of the magnet because a high response is possible only if the rotational force is increased by increasing the chain linkage area between the coil and the magnet.

The present invention generates vibration by linearly reciprocating the shaft, reduce the manufacturing cost by increasing the thickness of the magnet and reduce the length of the magnet, and reduces the distribution of vibration force by determining the vibration force by the weight of the vibrator, not the rotation force In addition, the present invention provides a vibrating motor which has reduced the size of the product and increased the life.

The technical problem to be achieved by the present invention is not limited to the technical problem mentioned above, and other technical problems not mentioned above may be clearly understood by those skilled in the art from the following description. will be.

In one embodiment, the vibration motor is a case having a cylindrical shape, a coil wound along the inner surface of the case, a power supply unit electrically connected to the coil and providing AC power to the coil, disposed inside the case And a vibrator disposed on an axis and an outer circumferential surface of the axis, the vibrator including a magnet acting with a magnetic field of the coil to linearly reciprocate the axis in a longitudinal direction, and a fixing member for sealing one end of the case.

According to the vibration motor of the present invention, by providing an AC power source having a constant frequency linearly reciprocating the shaft to attach a coil to the inner wall of the case to increase the thickness of the magnet and reduce the length of the product can reduce the manufacturing cost of the product have.

In addition, by applying an AC power source having a constant frequency through the power supply unit reciprocating the shaft in advance, there is an effect that can determine the vibration force as the weight of the weight rather than the rotational movement of the shaft to reduce the distribution of vibration force.

In addition, by supplying the AC power applied from the outside to the magnet and the coil through the connecting member and the printed circuit board without using a brush using a DC power supply, it reduces the size of the vibration motor to reduce the mounting area of the product, It has the effect of extending the life.

1 is a perspective view of a vibration motor according to an embodiment of the present invention.
2 is a cross-sectional view taken along line II ′ of FIG. 1.
3 is a cross-sectional view of a vibration motor according to another embodiment of the present invention.
4 is a cross-sectional view of a vibration motor according to another embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this process, the size or shape of the components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms that are specifically defined in consideration of the configuration and operation of the present invention may vary depending on the intention or custom of the user or operator. Definitions of these terms should be made based on the contents throughout the specification.

1 is a perspective view of a vibration motor according to an embodiment of the present invention, Figure 2 is a cross-sectional view taken along the line II 'of FIG.

1 and 2, the vibration motor 900 includes a case 100, a coil 200, a power supply unit 300, a vibrator 400, and a fixing member 500. In addition, the vibration motor 900 may further include an elastic member 600, a buffer member 700, and bearings 710 and 720.

The case 100 includes a first case 110 and a second case 120.

The first case 110 has an empty space formed therein, and has a cylindrical shape in which both surfaces facing each other are opened, and shields magnetic fields generated by the coil 200 and the vibrator 400 to be described later.

The second case 120 has a cylindrical shape having an empty space therein and is fitted into an empty space formed inside the first case 110. One side of the second case 120 is opened, and the other side facing the one side closes the other side of the first case 110 and a shaft hole is formed in the center portion.

The outer circumferential surface length of the second case 120 connecting one side surface and the other side surface of the second case 120 is shorter than the outer circumferential surface length of the first case 110.

The coil 200 is disposed between the inner surface of the second case 120 having an empty donut shape inside and the fixing member 500 to be described later.

The outer circumferential surface of the coil 200 is fixed to the inner surface of the first case 110, for example, the coil 200 is fixed by adhesive or welding. The thickness between the inner surface and the outer surface of the coil 200 is the same as the thickness between the inner surface and the outer surface of the second case 120 to reduce the area occupied by the coil 200 inside the case 100. have.

In order to electrically insulate the first case 110 and the coil 200 formed of a conductive material, an insulating tape may be further attached between the first case 110 and the coil 200. The thickness of the insulating tape may be about 0.03 mm to about 0.04 mm.

The power supply unit 300 is electrically connected to the coil 200 to apply AC power having a constant frequency to the coil 200. The power supply unit 300 includes a printed circuit board 310, The power supply unit 320 and the connection member 330 is included.

The printed circuit board 310 is disposed on one side of the coil 200 facing the fixing member 500, which will be described later, and is electrically connected to the coil 200 to provide AC power to the coil 200. A circular hole 315 is formed in the center of the printed circuit board 310.

The power supply unit 320 penetrates through the fixing device 500 to be described later, and one end thereof is connected to the printed circuit board 310, and the other end opposite to the one end thereof is connected to the connection member 330. Electrically connect the 310 and the connection member 330.

The connection member 330 is installed on the outer surface of the fixing device 500, one end is connected to the power supply unit 320 and the other end is electrically connected to an external power generator (not shown) to be applied from the outside Power is supplied to the printed circuit board 310.

The vibrator 400 includes a shaft 410, a magnet 420 and a weight 430.

The shaft 410 has a circular columnar shape, one end of the shaft 410 is inserted into the case 100 through the shaft hole formed on the other side of the second case 120, the coil 200 and will be described later A linear reciprocating motion is performed in the case 100 by the magnetic field generated by the interaction of the magnet 420.

On the other hand, since the length of the shaft 410 is formed longer than the combined length of the case 100 and the weight 430 to be described later, the other end side of the shaft 410 protrudes out of the case 100.

The magnet 420 has a cylindrical shape in which a through hole into which the shaft 410 is fitted is formed in the center, and is disposed to face the coil 200 on the outer circumferential surface of the shaft 410 introduced into the case 100.

The magnet 420 linearly reciprocates the shaft 410 by mutual magnetic field action with the coil 200.

According to an embodiment of the present invention, since the shaft 410 performs a linear reciprocating motion, the coil 200 may be fixed to the inner side of the first case 110, and the inner side and the outer side of the coil 200. By making the thickness between the same as the thickness of the first case 110, it is possible to further increase the thickness of the magnet 420 disposed in the case 100. In this way, if the thickness of the magnet 420 is increased, the length of the magnet 420 can be reduced, thereby reducing the manufacturing cost of the vibration motor 900.

The magnet 420 is fixed to the outer circumferential surface of the shaft 410 by, for example, an adhesive or the like.

Magnetic fluid 435 is disposed on one side of the magnet 420 and the other side edge facing the one side. The magnetic fluid 435 is in contact with one side edge of the magnet 420 and the inner surface of the coil 200, the magnetic fluid 435 disposed at the other side edge of the magnet 420 is the other side of the magnet 420 The edge is in contact with the inner surface of the second case 120.

The weight 430 generates vibration by a linear reciprocating motion of the shaft 410, and is coupled to the other end of the shaft 410 exposed to the outside of the case 100.

The fixing member 500 is coupled to one side of the opened first case 110 to seal one side of the first case 110. The fixing member 500 is introduced into the first case 110, and the fixing protrusion 510 is formed at the center of the surface facing the printed circuit board 310, and the fixing protrusion 510 is the center of the printed circuit board. The printed circuit board 310 is fixed to the hole 315 formed therein.

In addition, a shaft insertion groove 415 into which the shaft 410 is inserted is formed in the fixing protrusion 510 so as to reduce the size of the vibration motor 900, while the shaft 410 reciprocates linearly. It prevents the interference with the fixing member 500 when exercising.

The elastic member 600 is disposed between the case 100 and the weight 430 to prevent the weight 430 from impacting the case 100 when the shaft 410 linearly reciprocates.

Elastic member 600 is a leaf spring, one end is coupled to the weight 430, the other end opposite to one end is coupled to the case 100.

3 is a cross-sectional view of a vibration motor according to another embodiment of the present invention.

Referring to Figure 3, the elastic member 600 is a coil spring, one end is coupled to the weight 430, the other end opposite to one end is coupled to the case 100.

Referring again to FIGS. 1 and 2, the buffer member 700 is attached to the inside of the other side of the second case 120 in which the shaft hole is formed. The shock absorbing member 700 has a magnet 420 fixed to the shaft 410 when the shaft 410 linearly reciprocates by the mutual magnetic field of the coil 200 and the magnet 420. Prevent damage to the other side.

The bearings 710 and 720 are for smooth linear reciprocation of the shaft 410 and include a first bearing 710 and a second bearing 720.

The first bearing 710 is disposed between the shaft 410 and the shaft hole of the second case 120.

The second bearing 720 is disposed inside the shaft insertion groove 515 of the fixing member 5000, that is, between the shaft 410 and the shaft insertion groove 515.

4 is a cross-sectional view of a vibration motor according to another embodiment of the present invention. The vibration motor shown in FIG. 4 has substantially the same configuration as the vibration motor shown and described above in FIGS. 1 and 2 except for the vibrator. Therefore, duplicate descriptions of the same components will be omitted, and the same components and the same reference numerals will be given to the same components.

Referring to FIG. 4, the vibration motor includes a case 100, a coil 200, a power supply unit 300, a vibrator 400, and a fixing member 500. In addition, the vibration motor 900 further includes an elastic member 600, a buffer member 700, and bearings 710 and 720.

The vibrator 400 includes a shaft 410, a magnet 420, a weight 430, a magnet housing 440, and a reinforcing member 450.

The magnet housing 440 is a reinforcing member for increasing coupling force between the magnet 420 and the shaft 410, and is manufactured in a cylindrical shape in which a shaft hole into which the shaft 410 is fitted is formed. The magnet housing 440 is fixed to the outer circumferential surface of the shaft 410 introduced into the case 100, for example, fixed to the outer circumferential surface of the shaft 410 by adhesive or welding.

The reinforcing member 450 is disposed on one side of the weight 430 facing the elastic member 600 to increase the coupling force between the elastic member 600 and the weight 430.

As described in detail above, the vibration motor provides AC power having a constant frequency to the coil to linearly reciprocate the shaft in the longitudinal direction of the shaft, thereby attaching the coil to the inner wall of the case to increase the thickness of the magnet and reduce the length thereof. The manufacturing cost of the product can be reduced.

In addition, by applying an AC power source having a constant frequency through the power supply unit to reciprocate the shaft in advance, the vibration force can be determined by the weight of the weight rather than the rotational movement of the shaft, thereby reducing the distribution of the vibration force.

 In addition, by supplying the AC power applied from the outside to the magnet and the coil through the connecting member and the printed circuit board without using a brush using a DC power supply, it reduces the size of the vibration motor to reduce the mounting area of the product, It can extend the life.

Although embodiments according to the present invention have been described above, these are merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent embodiments of the present invention are possible therefrom. Therefore, the true technical protection scope of the present invention will be defined by the following claims.

100: case 200: coil
300: power supply unit 400: vibrator
410: axis 420: magnet
430 weight 500 fixed member

Claims (9)

  1. A case having a cylindrical shape;
    A coil wound along an inner surface of the case;
    A power supply unit electrically connected to the coil and providing an AC power to the coil;
    An oscillator including a magnet disposed in the case and an outer circumferential surface of the shaft so as to face the coil, and a magnet configured to linearly reciprocate the shaft in a longitudinal direction by working with a magnetic field of the coil; And
    Vibration motor including a fixing member for sealing one end of the case.
  2. The method of claim 1,
    The case has a cylindrical shape and a first case for shielding the magnetic fields generated from the coil and the magnet; And
    The vibrating motor disposed inside the first case, the one end is opened, and the other end opposite to the one end includes a cylindrical second case having an opening through which the shaft passes.
  3. The method of claim 2,
    The second case further comprises a shock absorbing member interposed between the second case and the magnet.
  4. The method of claim 1,
    The power supply unit includes a printed circuit board including a power supply unit for providing the AC power to the coil; And
    And a connecting member for providing the AC power to the power supply unit from the outside.
  5. The method of claim 1,
    The vibrator includes a weight coupled to the shaft protruding out of the case.
  6. The method of claim 5,
    And an elastic member having one end coupled to the weight and the other end coupled to the case facing the one end.
  7. The method of claim 6,
    The resilient member includes one of a coil spring and a leaf spring.
  8. The method of claim 1,
    And a magnetic fluid interposed between the magnet and the case, the magnet and the coil.
  9. The method of claim 1,
    And a first bearing interposed between the case and the shaft and a second bearing interposed between the fixing member and the shaft.
KR1020100020549A 2010-03-08 2010-03-08 Vibration motor KR20110101516A (en)

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KR1020100020549A KR20110101516A (en) 2010-03-08 2010-03-08 Vibration motor

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Application Number Priority Date Filing Date Title
KR1020100020549A KR20110101516A (en) 2010-03-08 2010-03-08 Vibration motor

Publications (1)

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KR20110101516A true KR20110101516A (en) 2011-09-16

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2015100710B4 (en) * 2014-06-03 2016-02-11 Apple Inc. Linear actuator
CN105990947A (en) * 2016-01-20 2016-10-05 四川安和精密电子电器有限公司 Low-noise high-vibration totally enclosed micro motor
US9501912B1 (en) 2014-01-27 2016-11-22 Apple Inc. Haptic feedback device with a rotating mass of variable eccentricity
US9564029B2 (en) 2014-09-02 2017-02-07 Apple Inc. Haptic notifications
US9640048B2 (en) 2009-09-30 2017-05-02 Apple Inc. Self adapting haptic device
US9652040B2 (en) 2013-08-08 2017-05-16 Apple Inc. Sculpted waveforms with no or reduced unforced response
US9779592B1 (en) 2013-09-26 2017-10-03 Apple Inc. Geared haptic feedback element
US9886093B2 (en) 2013-09-27 2018-02-06 Apple Inc. Band with haptic actuators
US9928950B2 (en) 2013-09-27 2018-03-27 Apple Inc. Polarized magnetic actuators for haptic response
US9997306B2 (en) 2012-09-28 2018-06-12 Apple Inc. Ultra low travel keyboard
US10013058B2 (en) 2010-09-21 2018-07-03 Apple Inc. Touch-based user interface with haptic feedback
US10039080B2 (en) 2016-03-04 2018-07-31 Apple Inc. Situationally-aware alerts
US10120446B2 (en) 2010-11-19 2018-11-06 Apple Inc. Haptic input device
US10126817B2 (en) 2013-09-29 2018-11-13 Apple Inc. Devices and methods for creating haptic effects
US10236760B2 (en) 2013-09-30 2019-03-19 Apple Inc. Magnetic actuators for haptic response
US10268272B2 (en) 2016-03-31 2019-04-23 Apple Inc. Dampening mechanical modes of a haptic actuator using a delay
US10276001B2 (en) 2013-12-10 2019-04-30 Apple Inc. Band attachment mechanism with haptic response
US10353467B2 (en) 2015-03-06 2019-07-16 Apple Inc. Calibration of haptic devices

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9934661B2 (en) 2009-09-30 2018-04-03 Apple Inc. Self adapting haptic device
US9640048B2 (en) 2009-09-30 2017-05-02 Apple Inc. Self adapting haptic device
US10013058B2 (en) 2010-09-21 2018-07-03 Apple Inc. Touch-based user interface with haptic feedback
US10120446B2 (en) 2010-11-19 2018-11-06 Apple Inc. Haptic input device
US9997306B2 (en) 2012-09-28 2018-06-12 Apple Inc. Ultra low travel keyboard
US9652040B2 (en) 2013-08-08 2017-05-16 Apple Inc. Sculpted waveforms with no or reduced unforced response
US9779592B1 (en) 2013-09-26 2017-10-03 Apple Inc. Geared haptic feedback element
US9928950B2 (en) 2013-09-27 2018-03-27 Apple Inc. Polarized magnetic actuators for haptic response
US9886093B2 (en) 2013-09-27 2018-02-06 Apple Inc. Band with haptic actuators
US10126817B2 (en) 2013-09-29 2018-11-13 Apple Inc. Devices and methods for creating haptic effects
US10236760B2 (en) 2013-09-30 2019-03-19 Apple Inc. Magnetic actuators for haptic response
US10276001B2 (en) 2013-12-10 2019-04-30 Apple Inc. Band attachment mechanism with haptic response
US9501912B1 (en) 2014-01-27 2016-11-22 Apple Inc. Haptic feedback device with a rotating mass of variable eccentricity
US9608506B2 (en) 2014-06-03 2017-03-28 Apple Inc. Linear actuator
US10069392B2 (en) 2014-06-03 2018-09-04 Apple Inc. Linear vibrator with enclosed mass assembly structure
AU2015100710B4 (en) * 2014-06-03 2016-02-11 Apple Inc. Linear actuator
US9830782B2 (en) 2014-09-02 2017-11-28 Apple Inc. Haptic notifications
US9564029B2 (en) 2014-09-02 2017-02-07 Apple Inc. Haptic notifications
US10353467B2 (en) 2015-03-06 2019-07-16 Apple Inc. Calibration of haptic devices
WO2017124638A1 (en) * 2016-01-20 2017-07-27 四川安和精密电子电器有限公司 Low-noise high-vibration totally enclosed micro motor
CN105990947A (en) * 2016-01-20 2016-10-05 四川安和精密电子电器有限公司 Low-noise high-vibration totally enclosed micro motor
US10039080B2 (en) 2016-03-04 2018-07-31 Apple Inc. Situationally-aware alerts
US10268272B2 (en) 2016-03-31 2019-04-23 Apple Inc. Dampening mechanical modes of a haptic actuator using a delay

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