WO2019010724A1 - Plaque à ressort silencieux, ressort silencieux et moteur à vibration linéaire - Google Patents

Plaque à ressort silencieux, ressort silencieux et moteur à vibration linéaire Download PDF

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Publication number
WO2019010724A1
WO2019010724A1 PCT/CN2017/094535 CN2017094535W WO2019010724A1 WO 2019010724 A1 WO2019010724 A1 WO 2019010724A1 CN 2017094535 W CN2017094535 W CN 2017094535W WO 2019010724 A1 WO2019010724 A1 WO 2019010724A1
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WO
WIPO (PCT)
Prior art keywords
muffler
connecting portion
spring
vibration motor
width
Prior art date
Application number
PCT/CN2017/094535
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English (en)
Chinese (zh)
Inventor
王哲
Original Assignee
四川安和精密电子电器有限公司
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Publication date
Application filed by 四川安和精密电子电器有限公司 filed Critical 四川安和精密电子电器有限公司
Publication of WO2019010724A1 publication Critical patent/WO2019010724A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/18—Leaf springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F3/00—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic
    • F16F3/02—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of steel or of other material having low internal friction
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/02—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs

Definitions

  • the present invention relates to the field of motor technology, and in particular to a muffler shrapnel, a muffler spring, and a linear vibration motor.
  • the linear vibration motor works by supplying power to the coil, causing the coil to generate a magnetic field that is transformed according to a certain frequency.
  • the transformed magnetic field and the magnet in the vibrator member repel each other or attract, and the spring is connected to the magnet and vibrates up and down with the magnet, thereby generating Vibrate.
  • the spring in the existing motor is a conventional spring structure, and in the process of being pulled up and down by the magnetic force, a large amplitude is generated, and the springs easily interfere with each other and generate noise, and the vibration fatigue life of the spring is short, resulting in a motor. Short service life.
  • a first technical solution provided by the present invention is: a sound absorbing elastic piece for use in a linear vibration motor, the sound absorbing elastic piece including a bending portion and a first connecting portion and a second connecting portion respectively connected to both ends of the bending portion,
  • the first connecting portion is configured to be coupled to the stator member
  • the second connecting portion is configured to be coupled to the vibrator member
  • the curved portion gradually increasing in width from the central portion to the both ends, the first connecting portion and The width of the second connecting portion is greater than the width of the curved portion.
  • a ratio of a width of both ends of the curved portion to a width of the middle portion is greater than 1 and less than or equal to 3.
  • a ratio of a width of the first connecting portion or the second connecting portion to a width at a widest portion of the curved portion is greater than 1 and less than or equal to 3.
  • the curvature of the middle portion of the curved portion is the largest compared to the curvature of other portions of the curved portion.
  • a gap is formed between the connection portion of the second connecting portion and the curved portion, and the notch is configured to reduce stress generated when the second connecting portion is active.
  • the curved portion extends in a spiral shape from the first connecting portion to the second connecting portion.
  • a curved range in which the curved portion extends from the first connecting portion to the second connecting portion is 180° to 270°.
  • the sound-damping elastic piece is an integrally formed structure, and is made of austenitic stainless steel or martensitic spring steel material.
  • a silencing spring includes at least three silencing shrapps provided by the first technical solution.
  • the at least three silencer shrapnels are spaced apart from each other.
  • first connecting portion of the at least three sound-damping elastic pieces is configured to be evenly connected to the stator member, and the second connecting portions of the at least three sound-damping elastic pieces are evenly connected to the vibrator member at intervals, The bent portions of the at least three sound-damping shrapnel are spaced apart from each other.
  • a curvature of the upper middle portion of the curved portion is the largest, and a central portion of each of the curved portions corresponds to one of the second connecting portions.
  • the muffler spring further includes an inner ring connected to each of the second connecting portions, the inner ring being configured to be coupled to the vibrator member.
  • the number of the silencing shrapnel is 3 to 6.
  • a third technical solution provided by the present invention a linear vibration motor comprising a stator component, a vibrator component, and a muffler spring provided by the second technical solution; the first connection portion of the at least three muffler shrapnels is configured to be connected The second connecting portion of the at least three sound-damping shrapnels is coupled to the vibrator member on the stator component.
  • stator component includes a bottom plate and a printed circuit board, a coil, and a casing mounted on the bottom plate; the bottom plate and the casing enclose a cavity, and the vibrator member and the muffler spring are both located Inside the cavity;
  • the vibrator member includes a yoke and a magnet mounted inside the yoke and a weight block mounted outside the yoke, the coil corresponding to a gap between the yoke and the magnet;
  • the first connecting portion of the muffler spring is evenly connected to the housing, and the second connecting portion of the muffler spring is evenly connected to the counterweight.
  • a recess is formed in a sidewall of the housing, and the first connecting portion is welded in the recess.
  • the second connecting portion is welded to the weight.
  • a linear vibration motor includes a stator member, a vibrator member, and a muffler spring.
  • the muffler spring includes at least three muffled elastic pieces, and the at least three muffled elastic pieces are spaced apart from each other, and the muffler shrapnel includes a bent portion and a first connecting portion and a second connecting portion respectively connected to both ends of the curved portion, the first connecting portion being connected to the stator member, and the second connecting portion being connected to the vibrator member
  • the width of the curved portion is smaller than the first connecting portion and smaller than the width of the second connecting portion.
  • the width from the middle to the both ends of the curved portion gradually becomes larger.
  • first connecting portions of the at least three sound-damping shrapnel are evenly connected to the stator component at intervals
  • the second connecting portion of the at least three sound-damping shrapnels are evenly connected to the vibrator member at intervals.
  • the muffling elastic piece and the muffling spring provided by the present invention have the beneficial effects of: firstly, designing the first connecting portion and the second connecting portion connected to both ends of the curved portion
  • the width is larger than the width of the curved portion, and thus, the vibration fatigue life of the sound absorbing elastic piece can be improved.
  • the width of the curved portion gradually increases from the central portion to the both ends, so that the wider the portion of the curved portion closer to the first connecting portion and the second connecting portion, the connection of the silencer shrapnel is ensured. Strength, increased service life.
  • the linear vibration motor provided by the present invention has the beneficial effects that: firstly, the noise reduction spring in the second technical solution is used to improve the service life of the linear vibration motor. Secondly, the muffler spring in the linear vibration motor comprises at least three silencing shrapnel arranged at intervals, which prevents the muffled shrapnel from interfering with each other during the vibration process, avoids noise generation, has good silencing effect, and maximizes vibration space. , thereby increasing the vibration of the linear vibration motor.
  • FIG. 1 is a schematic structural view of a perspective view of a linear vibration motor according to a first embodiment of the present invention.
  • FIG. 2 is a schematic structural view of another perspective view of a linear vibration motor according to a first embodiment of the present invention.
  • Figure 3 is a full cross-sectional view taken along line A-A of Figure 2;
  • FIG. 4 is a structural schematic view of a viewing angle of the linear vibration motor of FIG. 2 with the bottom plate and the printed circuit board removed.
  • FIG. 5 is a structural schematic view of another perspective view of the linear vibration motor of FIG. 2 with the bottom plate and the printed circuit board removed.
  • FIG. 6 is a schematic structural view of the muffler shrapnel of FIG. 5.
  • Fig. 7 is a structural schematic view showing a viewing angle of the muffler spring of Fig. 5.
  • FIG. 8 is a structural schematic view of another perspective view of the muffler spring of FIG. 5.
  • FIG. 8 is a structural schematic view of another perspective view of the muffler spring of FIG. 5.
  • FIG. 9 is a schematic structural view of a linear vibration motor according to a second embodiment of the present invention.
  • Icon 100-linear vibration motor; 10-floor; 20-printed circuit board; 30-coil; 40-shell; 41-groove; 50-yoke; 60-magnet; 70-weight; 80-silence Spring; 81-muffler shrapnel; 811-bend; 812-first joint; 813-second joint; 814-notch; 82-inner ring.
  • the terms “set”, “install”, “connected”, and “connected” are to be understood broadly, and may be fixed connections, for example, unless otherwise specifically defined and defined. It can also be a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be internal communication between the two elements.
  • the specific meaning of the above terms in the present invention can be understood in a specific case by those skilled in the art.
  • the present embodiment provides a linear vibration motor 100 including a stator member, a vibrator member, and a muffler spring 80.
  • the stator component includes a bottom plate 10 and a printed circuit board 20, a coil 30, and a housing 40 mounted on the base plate 10.
  • the coil 30 is in communication with an external power source through the printed circuit board 20.
  • the vibrator member and the muffler spring 80 are located in a cavity enclosed by the bottom plate 10 and the housing 40.
  • the vibrator member includes a yoke 50 and a magnet 60 mounted inside the yoke 50 and a weight 70 mounted on the outside of the yoke 50.
  • the yoke 50 has a barrel shape in which one end is closed and one end is open.
  • the weight 70 is annular and is sleeved on the outer circumferential surface of the yoke 50.
  • the coil 30 corresponds to a gap between the yoke 50 and the magnet 60. During the vibration of the vibrator member in the housing 40, the coil 30 projects into or out of the gap.
  • the muffler spring 80 has a hollow annular structure, and the muffler spring 80 is located at the periphery of the coil 30 and spaced apart from the coil 30.
  • One end of the muffler spring 80 is coupled to one end of the casing 40 near the bottom plate 10, and the other end of the muffler spring 80 is welded to the counterweight 70 so that the vibrator member can vibrate within the casing 40 by the muffler spring 80.
  • the working principle of the linear vibration motor 100 provided by this embodiment: Referring to FIG. 3, the coil 30 passes through the printed circuit board. After communicating with the external power source, an electric field is formed around the coil 30, the printed circuit board 20 controls the change of the electric field, and the magnet 60 is subjected to the electric field force in the changing electric field. At the same time, the magnet 60 is also subjected to the elastic force of the muffler spring 80. The magnet 60 is connected to the yoke 50 and the weight 70 to linearly vibrate up and down to realize the function of the linear vibration motor 100.
  • the housing 40 is in the shape of a barrel closed at one end and open at one end.
  • the vibrator member and the muffler spring 80 are disposed inside the casing 40, and the muffler spring 80 fills the cavity of the casing 40 as much as possible, and supports the vibrator member inside the casing 40, and the support force of the muffler spring 80 to the vibrator member is relatively uniform.
  • a groove 41 is formed in the side wall of the casing 40 at a position close to the open end, and one end of the muffler spring 80 is welded into the groove 41, so that the connection strength between the muffler spring 80 and the casing 40 can be improved.
  • the sound-damping elastic piece 81 includes a curved portion 811 and a first connecting portion 812 and a second connecting portion 813 which are respectively connected to both ends of the curved portion 811, and the first connecting portion 812 (the end portion on the right side in FIG. 6) is used.
  • the second connecting portion 813 (the end on the left side in Fig. 6) is used for welding to the vibrator member.
  • the joint of the second connecting portion 813 and the curved portion 811 forms a notch 814 for reducing the stress generated when the second connecting portion 813 and the curved portion 811 are active to improve the service life of the sound-damping elastic piece 81.
  • the curved portion 811 extends in a spiral shape from the first connecting portion 812 to the second connecting portion 813 and gradually approaches the central axis of the sound absorbing elastic piece 81 to have a contraction tendency.
  • the angle at which the bent portion 811 extends from the first connecting portion 812 to the second connecting portion 813 is 180° to 270°.
  • the above-mentioned structure of the sound-damping elastic piece 81 is advantageous for providing a plurality of sound-damping elastic pieces 81 in the cavity of the casing 40, so that the sound-damping elastic piece 81 fills the cavity of the casing 40 as much as possible, thereby improving the balanced supporting force for the vibrator parts, and is advantageous for The plurality of silencing shrapnels 81 are spaced apart to avoid mutual interference and to avoid vibration noise. Further, the above structure can maximize the vibration space, thereby increasing the vibration of the linear vibration motor.
  • extension length and the bending angle of the curved portion 811 can also be rotated in a wide variety of ways, as long as the sound-damping elastic pieces 81 are spaced apart from each other and do not interfere with each other.
  • the width of the first connecting portion 812 and the second connecting portion 813 is larger than the width of the curved portion 811, so that the whole of the sound-damping elastic piece 81 has a small intermediate structure at both ends. In order to improve the vibration fatigue life of the sound absorbing elastic piece 81.
  • the second connecting portion 813 for connecting the vibrator portion is larger in size than the first connecting portion 812 for connecting the housing 40, thus ensuring stable and balanced support of the vibrator member while avoiding the silencing shrapnel 81 and The welding range between the casings 40 is too large, affecting the strength and elasticity of the sound absorbing elastic piece 81.
  • the portion where the strength of the sound-damping elastic piece 81 is the lowest is also the portion where the first connecting portion 812 is welded to the groove 41, and therefore, the length of the first connecting portion 812 extending within the groove 41 (first connection)
  • the length of the portion 812 welded in the groove 41 can be designed to be 2 to 3 times the width of the first connecting portion 812 according to the strength requirement, so as to ensure sufficient welding strength, and at the same time,
  • the silencer shrapnel 81 has sufficient strength.
  • first connecting portion 812 and the second connecting portion 813 are relatively large in size with respect to the curved portion 811, but the area in which the first connecting portion 812 and the second connecting portion 813 are actually used for welding is not the entire first connecting portion 812. And the second connecting portion 813, except that the solder joints fall on the first connecting portion 812 and the second connecting portion 813, and the actual soldering area is much smaller than the areas of the first connecting portion 812 and the second connecting portion 813.
  • the ratio of the width of the both ends of the curved portion 811 to the width of the middle portion is: greater than 1 and less than or equal to 3.
  • the ratio of the width of the first connecting portion 812 or the second connecting portion 813 to the width at the widest point on the curved portion 811 is greater than 1 and less than or equal to 3.
  • the sound-damping spring 80 includes an inner ring 82 and at least three sound-damping elastic pieces 81.
  • the number of the sound-damping elastic pieces 81 in the present embodiment is three, three sound-absorbing elastic pieces 81 are spaced apart from each other, and the inner ring 82 is three.
  • the second connecting portions 813 of the muffling elastic pieces 81 are connected in series in series.
  • the inner ring 82 and the second connecting portion 813 are collectively welded to the vibrator member, and the stability of the muting spring 80 to the vibrator member support can be further improved, and the vibrator member can be prevented from shifting during the vibration process and hitting other members to generate noise.
  • the three sound-damping elastic pieces 81 are evenly spaced, and the three same sound-damping elastic pieces 81 are located on the same circumference corresponding to the same position.
  • silencer shrapnel 81 can also be 3 to 6, and 5 or 6 silencer shrapnel 81 can be designed for a large-sized vibration motor, and 3 or 4 can be designed for a small-sized vibration motor. Silencer shrapnel 81.
  • the first connecting portion 812 of the three sound-damping elastic pieces 81 is used to be evenly connected to the casing 40, and the second connecting portions 813 of the three sound-damping elastic pieces 81 are evenly connected to the weight 70, and the bending portions of the three sound-damping elastic pieces 81 are bent. 811 are spaced apart from each other. In this way, the three silencing shrapnels 81 are completely spaced apart from each other, and the ability of each of the silencing shrapnel 81 to independently oscillate independently is maximized, and the three silencing shrapnel 81 are prevented from interfering with each other to avoid vibration noise.
  • the three first connecting portions 812 are independent of each other, so that the portion where the silencing spring 80 actually elastically vibrates is increased, and the elastic performance is improved.
  • the curvature of the middle portion of the curved portion 811 of each of the sound absorbing elastic pieces 81 is the largest, and a second connecting portion 813 is correspondingly provided for the middle portion of each of the curved portions 811.
  • the curvature of each portion of each curved portion 811 can be changed gently, so that the stress generated by the silencing spring 80 during the vibration is small.
  • the muffler spring 80 is integrally formed of 301EH austenitic stainless steel or martensitic spring steel to ensure sufficient rigidity and elasticity.
  • the linear vibration motor 100 provided in this embodiment has the following beneficial effects:
  • the muffler spring 80 includes three silencing shrapnel 81 that are not directly connected to each other, which maximizes the ability of each muffler shrapnel 81 to independently oscillate independently, and also prevents the three muffler shrapnel 81 from interfering with each other.
  • Each of the sound-damping elastic pieces 81 is designed to have a large intermediate structure at both ends, which improves the vibration fatigue life of the sound-damping elastic piece 81.
  • the width of the curved portion 811 of each of the sound-damping elastic pieces 81 gradually increases from the center to the both ends, which cancels the influence of the welding of the first connecting portion 812 and the second connecting portion 813 on the strength of the sound-damping elastic piece 81, and the sound-damping elastic piece 81 is secured. Strength of.
  • the notch 814 is formed at the joint of the second connecting portion 813 and the curved portion 811, and the stress generated when the second connecting portion 813 and the curved portion 811 are moved can be reduced to improve the service life of the sound-damping elastic piece 81.
  • the three first connecting portions 812 are independent of each other, so that the portion of the silencing spring 80 actually elastically vibrating is increased, and the elastic performance is improved.
  • the three second connecting portions 813 are integrally connected by the inner ring 82, so that the stability of the muting spring 80 to the vibrator member support can be further improved, and the vibrator member can be prevented from shifting during the vibration process and hitting other members to generate noise.
  • the housing 40 is provided with a recess 41.
  • the first connecting portion 812 is welded in the recess 41, which improves the connection strength between the muffler 81 and the housing 40.
  • the curved portion 811 extends in a spiral shape from the first connecting portion 812 to the second connecting portion 813, and gradually approaches the central axis of the sound-damping elastic piece 81, and has a contraction tendency, thereby maximally increasing the vibration space, thereby increasing the linear vibration motor. The sense of vibration.
  • the present embodiment provides a linear vibration motor 100 which differs from the linear vibration motor 100 provided in the first embodiment in that the structure of the muffler spring 80 is different.
  • the muffler spring 80 used in this embodiment does not include the inner ring 82, and the second connecting portions 813 of the three muffler pieces 81 are spaced apart from each other.
  • the muffler spring 80 includes at least three muffler pieces 81, and the number of the muffler pieces 81 is preferably three.
  • the three silencing shrapnels 81 are spaced apart from each other.
  • Each of the sound absorbing elastic pieces 81 includes a curved portion 811 and a first connecting portion 812 and a second connecting portion 813 which are respectively connected to both ends of the curved portion 811, and the first connecting portion 812 is evenly connected to the stator member, and the second connecting portion 813 is spaced apart Uniformly connected to the vibrator member, the width of the curved portion 811 is smaller than the width of the first connecting portion 812 and the second connecting portion 813. The width of the curved portion 811 of each of the sound absorbing elastic pieces 81 gradually increases from the center to the both ends.
  • Each of the sound absorbing elastic pieces 81 is integrally formed of 301EH austenitic stainless steel or martensitic spring steel.
  • the linear vibration motor 100 provided in this embodiment has the following beneficial effects in addition to the effects in the first embodiment:
  • the second connecting portions 813 of the three silencing shrapnel 81 are spaced apart from each other, further reducing the welding area between the silencing spring 80 and the vibrator member, improving the strength of the silencing elastic piece 81, and also causing the silencing spring 80 to actually elastically vibrate. Increased parts and improved elastic properties.
  • the three muffler springs 81 included in the muffler spring 80 are completely independent of each other. When a muffler shrapnel 81 is damaged, the muffler shrapnel 81 can be replaced, and the maintenance is convenient and the maintenance cost is low.
  • the invention can improve the vibration fatigue life of the silencer shrapnel, and make the silencer shrapnel more durable; the silencer shrapnel does not interfere with each other during the vibration process, thereby avoiding noise generation and reducing environmental noise; When the muffler shrapnel is damaged, the muffler shrapnel can be replaced accordingly, and the maintenance is convenient and the maintenance cost is low; the vibration space is maximized, thereby increasing the vibration of the motor.

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

Abstract

L'invention concerne une plaque à ressort silencieux (81), un ressort silencieux (80) et un moteur à vibration linéaire (100), se rapportant au domaine technique des moteurs. La plaque à ressort silencieux est utilisée dans un moteur à vibration linéaire, et la plaque à ressort silencieux comprend une partie courbée (811) et une première partie de liaison (812) et une seconde partie de liaison (813) respectivement reliées aux deux extrémités de la partie courbée (811), la première partie de liaison étant reliée à un composant de stator, la seconde partie de liaison étant reliée à un composant de vibreur, la largeur de la partie courbée du milieu aux deux extrémités augmentant progressivement, et la largeur de la première partie de liaison et de la seconde partie de liaison est supérieure à la largeur de la partie courbée. Le ressort silencieux comprend au moins trois plaques à ressort silencieux. Le moteur à vibration linéaire comprend le ressort silencieux. Les plaques à ressort silencieux ont une longue résistance à la fatigue par vibration, et la force de liaison est élevée, ce qui augmente la durée de vie du moteur à vibration linéaire.
PCT/CN2017/094535 2017-07-10 2017-07-26 Plaque à ressort silencieux, ressort silencieux et moteur à vibration linéaire WO2019010724A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201710558227.1A CN109236913A (zh) 2017-07-10 2017-07-10 消音弹片、消音弹簧和线性振动马达
CN201710558227.1 2017-07-10

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WO2019010724A1 true WO2019010724A1 (fr) 2019-01-17

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Publication number Priority date Publication date Assignee Title
JP7410655B2 (ja) * 2019-05-30 2024-01-10 ニデックインスツルメンツ株式会社 アクチュエータ
JP7339021B2 (ja) * 2019-05-30 2023-09-05 ニデックインスツルメンツ株式会社 アクチュエータ

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015126673A (ja) * 2013-12-27 2015-07-06 日本電産コパル株式会社 振動アクチュエータ、および携帯情報端末
CN205622466U (zh) * 2016-03-28 2016-10-05 歌尔股份有限公司 振动马达以及便携式设备
KR101746007B1 (ko) * 2017-02-02 2017-06-12 주식회사 블루콤 자계 폐회로 형성 케이스를 포함하는 리니어 타입 상하진동모터
CN206874722U (zh) * 2017-07-10 2018-01-12 四川安和精密电子电器有限公司 消音弹片、消音弹簧和线性振动马达

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015126673A (ja) * 2013-12-27 2015-07-06 日本電産コパル株式会社 振動アクチュエータ、および携帯情報端末
CN205622466U (zh) * 2016-03-28 2016-10-05 歌尔股份有限公司 振动马达以及便携式设备
KR101746007B1 (ko) * 2017-02-02 2017-06-12 주식회사 블루콤 자계 폐회로 형성 케이스를 포함하는 리니어 타입 상하진동모터
CN206874722U (zh) * 2017-07-10 2018-01-12 四川安和精密电子电器有限公司 消音弹片、消音弹簧和线性振动马达

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