WO2017051843A1 - Moteur à vibration linéaire - Google Patents

Moteur à vibration linéaire Download PDF

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Publication number
WO2017051843A1
WO2017051843A1 PCT/JP2016/077953 JP2016077953W WO2017051843A1 WO 2017051843 A1 WO2017051843 A1 WO 2017051843A1 JP 2016077953 W JP2016077953 W JP 2016077953W WO 2017051843 A1 WO2017051843 A1 WO 2017051843A1
Authority
WO
WIPO (PCT)
Prior art keywords
mover
pair
linear vibration
vibration motor
housing
Prior art date
Application number
PCT/JP2016/077953
Other languages
English (en)
Japanese (ja)
Inventor
栞 石井
片田　好紀
慎 小田島
昇 生川
Original Assignee
日本電産コパル株式会社
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 日本電産コパル株式会社 filed Critical 日本電産コパル株式会社
Priority to CN201680054467.1A priority Critical patent/CN108028591A/zh
Publication of WO2017051843A1 publication Critical patent/WO2017051843A1/fr

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Classifications

    • 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
    • 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

Definitions

  • the present invention relates to a linear vibration motor.
  • Vibration motors are widely used as devices that are built into portable electronic devices and transmit signal generations such as incoming calls and alarms to vibration carriers by vibrations. , Has become an indispensable device.
  • a vibration motor has attracted attention as a device that realizes haptics (skin sensation feedback) in a human interface such as a touch panel.
  • This linear vibration motor includes a stator having a casing and a coil, and a mover having a magnet and a weight (weight), and a driving force (Lorentz force) applied to the magnet by energizing a driving current to the coil. ) Linearly vibrates the mover (see Patent Document 1 below).
  • the above-described linear vibration motor supports the mover in a single axial direction via a spring in the casing, and the coil fixed in the casing is wound around the vibration axis of the mover.
  • the magnet of the mover is disposed inside the coil. Therefore, if the weight of the mover is enlarged to secure a sufficient mass of the weight, the weight and the magnet Before connecting the magnets, it is necessary to dispose the magnet inside the coil, and the assembly procedure is restricted, resulting in a problem that good productivity cannot be obtained.
  • the mover is passed through the inside of the coil, there is a problem that the mover and the coil are in contact with each other and a defect such as disconnection of the coil is likely to occur.
  • the problem of the present invention is to solve such a problem. That is, reducing the restrictions on the assembly procedure in the linear vibration motor, suppressing the occurrence of defective production such as coil disconnection, improving the workability at the time of assembly in the linear vibration motor corresponding to the thinning, etc. It is the subject of the present invention.
  • a linear vibration motor has the following configuration.
  • a mover including a magnet part and a weight part; a housing that houses the mover; a pair of coils that apply a driving force to vibrate the mover to the magnet part; and the housing,
  • a linear vibration motor characterized in that the linear vibration motor is fixed to the pair of support surfaces in between.
  • FIG. 1 is an exploded perspective view showing an overall configuration of a linear vibration motor according to an embodiment of the present invention.
  • FIG. 1 is an explanatory diagram showing an overall configuration of a linear vibration motor according to an embodiment of the present invention ((a) is an external plan view, and (b) is an AA sectional view in (a)). It is explanatory drawing ((a) is a perspective view of the state which open
  • 1 and 2 show the overall configuration of a linear vibration motor according to an embodiment of the present invention.
  • the X direction in each figure indicates the vibration direction (uniaxial direction), the Y direction indicates the width direction, and the Z direction indicates the thickness (height) direction.
  • the linear vibration motor 1 includes a mover 2 having a magnet portion 2A and a weight portion 2B, a housing 3 that houses the mover 2, and a pair of coils that are respectively fixed to a pair of support surfaces 3A and 3B of the housing 3. 4A, 4B and an elastic member 5 provided in the housing 3 are provided.
  • the pair of coils 4A and 4B applies a driving force to vibrate the mover 2 to the magnet portion 2A by energizing the driving current, and the elastic member 5 applies the driving force generated by energizing the pair of coils 4A and 4B.
  • a repelling elastic force is applied to the mover 2.
  • the casing 3 includes a pair of support surfaces 3A and 3B along the vibration direction of the mover 2, and the pair of coils 4A and 4B sandwich the magnet portion 2A. Since it is fixed to the pair of support surfaces 3A and 3B, the work of passing the magnet portion 2A of the mover 2 through the coil becomes unnecessary. Thereby, the restrictions of the assembly procedure in the linear vibration motor 1 can be reduced. Moreover, since the needle
  • the magnet part 2A of the mover 2 includes three magnet pieces 11, 12, 13 and two spacers 14, 15 disposed between them.
  • the illustrated magnet pieces 11, 12, 13 are magnetized along the illustrated X direction (vibration direction of the mover 2), and the magnetic poles of the magnet pieces 11, 12 close to each other and the magnet pieces 12, 13 are close to each other.
  • the magnetization direction is set so that the magnetic poles to be made have the same polarity.
  • the spacer 14 disposed between the magnet pieces 11 and 12 and the spacer 15 disposed between the magnet pieces 12 and 13 may be a magnetic body (yoke) or a non-magnetic body. In the case where a holding member for holding the magnet pieces 11, 12, 13 at a predetermined interval is separately provided, the spacers 14, 15 can be omitted to make the interval a gap.
  • the pair of coils 4A and 4B for applying a driving force to the magnet portion 2A are wound along the X direction (vibration direction of the mover 2) and the Y direction (width direction of the mover 2) shown in the drawing, respectively. .
  • the pair of coils 4A and 4B are energized with a drive current so that the current directions of both are opposite to each other, and the Y-direction winding portions of the coils 4A and 4B are disposed on the portions where the spacers 14 and 15 are disposed.
  • it is being fixed to a pair of support surfaces 3A and 3B in the housing
  • the weight 2B of the mover 2 has weights 20 disposed on both sides in the vibration direction (X direction in the drawing) of the mover 2, and the weight 20 and the magnet 2B are connected via a connecting member 21. ing.
  • the weight body 20 can be made of a metal material having a high specific gravity (for example, tungsten).
  • the weight body 20 has a height in the Z direction larger than the thickness of the magnet portion 2B and is larger than the width of the magnet portion 2B. It has a rectangular cross-sectional shape having a width in the Y direction.
  • reinforcing members 22 are disposed on both sides of the magnet portion 2B. Both ends of the reinforcing member 22 are connected to the connecting member 21 so that the magnet portion 2A including the plurality of magnet pieces 11, 12, 13 and the plurality of spacers 14 and 15 and the weight portion 2B including the plurality of weight bodies 20 are integrated.
  • the rigidity of the mover 2 is enhanced by reinforcement.
  • the movable element 2 has a thickness that intersects the vibration direction (X direction) and the width direction (Y direction) with respect to the dimension in the width direction (Y direction) that intersects the linear vibration direction (X direction). It has a thin shape with a small dimension in the vertical direction (Z direction in the figure).
  • the contents inside the housing 3) are accommodated by reducing the thickness of the pair of coils 4A and 4B wound in the illustrated X direction and the illustrated Y direction in the illustrated Z direction.
  • the mover 2 and the coils 4A and 4B) can be thinned.
  • a guide shaft 6 is provided between the pair of coils 4 ⁇ / b> A and 4 ⁇ / b> B to support the mover 2 so as to vibrate along a single axial direction.
  • the guide shaft 6 is divided and arranged along one axial direction (X direction in the drawing), one end side thereof is fixed to the weight body 20, and the other end side protrudes in the opposite direction to form a free end.
  • the guide shaft 6 is arranged coaxially with the center of gravity axis of the mover 2 and guides the vibration of the mover 2 along a uniaxial direction.
  • the guide shaft 6 is divided and arranged.
  • the guide shaft 6 may be fixed through the magnet portion 2B or slidably supported through the magnet portion 2B.
  • the weight body 20 includes a guide shaft support portion 20 ⁇ / b> A for supporting the guide shaft 6.
  • the guide shaft support portion 20A is a portion that is recessed along the uniaxial direction from the end portion 20B of the weight body 20, and the guide shaft 6 supported at one end side by the guide shaft support portion 20A is the support surface 3A of the housing 3. Is slidably supported along a uniaxial direction (the X direction in the drawing) on the bearing 7 attached via the bearing support portion 7A.
  • the guide shaft support portion 20A of the weight body 20 has a width enough to accommodate the bearing 7, and the bearing 7 enters the guide shaft support portion 20A, thereby ensuring a large amplitude of the movable element 2. is doing.
  • one end side of the guide shaft 6 is fixed to the mover 2 side (weight body 20), and the other end side of the guide shaft 6 is slidable by a bearing 7 provided in the housing 3.
  • the example which supports is shown, it replaces with this and the one end side of the guide shaft 6 is fixed to the housing
  • the elastic member 5 is disposed between the mover 2 and the housing 3.
  • the elastic member 5 is arranged non-coaxially with the pair of guide shafts 6 along the uniaxial direction, and an elastic force repelling a driving force generated by the coils 4A and 4B and the magnet portion 2B is applied to the mover. 2 is given.
  • a coil spring that extends and contracts along the uniaxial direction (X direction) is used as the elastic member 5, and two elastic members 5 on one side are disposed between the end 20 ⁇ / b> B of the weight body 20 and the housing 3. Is intervening.
  • the elastic member 5 is disposed in parallel with the pair of guide shafts 6.
  • One end of the elastic member 5 is supported by a support protrusion 16 provided on the housing 3, and the other end of the elastic member 5 is supported by a support protrusion 17 provided on an end 20 ⁇ / b> B of the weight body 20.
  • the housing 3 only needs to have a case-like configuration capable of accommodating each part, but in the illustrated example, the casing 3 is constituted by a frame body 30 and a lid body 31 each having a housing part.
  • the frame 30 has a rectangular bottom surface 30A, has side walls 30B, 30C, 30D, and 30E erected on the periphery thereof, and has a box shape in which the bottom surface 30A is open.
  • the lid 31 is a plate-like member that covers the opened bottom surface 30A.
  • the frame body 30 can be formed by processing (pressing or the like) a metal plate.
  • the frame 30 has a thin shape in which the dimension in the thickness direction (Z direction in the figure) is smaller and the dimension in the vibration direction (X direction in the figure) is larger than the dimension in the width direction (Y direction in the figure). It has a substantially rectangular parallelepiped shape (box shape).
  • the lid 31 is formed in a rectangular plate attached to the upper end surfaces of the side walls 30B to 30E of the frame 30.
  • the support surface 3A of the housing 3 is provided on the bottom surface 30A of the frame 30, the support surface 3B of the housing 3 is provided on the inner surface 31A of the lid 31, and the pair of coils 4A and 4B.
  • One coil 4A is fixed to the frame body 30 side, and the other coil 4B is fixed to the lid body 31 side. According to this, it is possible to arrange the pair of coils 4 ⁇ / b> A and 4 ⁇ / b> B only by attaching the lid body 31 to the frame body 30.
  • the side walls 30B and 30D of the frame 30 are provided with the above-described support protrusions 16 that support one end side of the elastic member 5, and guide walls are provided on the inner surfaces of the side walls 30B and 30D as necessary.
  • a buffer member (rubber material or the like) 34 is attached as a buffer when the end of 6 collides.
  • a suction plate (magnetic plate) 32 and a sliding plate 33 are disposed as necessary.
  • the attraction plate 32 is a magnetic plate, and is a member that attracts a part of the magnet portion 2 ⁇ / b> A in order to pre-rotate the mover 2 in one direction around the guide shaft 6.
  • the sliding plate 33 is a member that is disposed in a portion where the movable element 2 that is urged to rotate in one direction in advance is allowed to come into contact with the movable element 2 so that the movable element 2 can smoothly slide.
  • the suction plate 32 is attached to the inner surface 31 ⁇ / b> A of the lid body 31, and the sliding plate 33 is attached to the bottom surface 30 ⁇ / b> A of the frame body 30.
  • the coil 4 ⁇ / b> A is fixed to the bottom surface 30 ⁇ / b> A of the frame body 30 of the housing 3.
  • the sliding plate 33 is attached to the bottom surface 30A.
  • the magnet portion 2A and the weight portion 2B are integrated in advance, and when the guide shaft 6 is provided, the guide shaft 6 is also fixed to the mover 2 in advance.
  • the guide shaft 6 is pivotally supported by the bearing 7, and the bearing support portion 7 ⁇ / b> A is attached to the bottom surface 30 ⁇ / b> A of the frame body 30, thereby assembling the mover 2 in the frame body 30.
  • the elastic member 5 is mounted between the end 20B of the weight 20 and the side walls 30B and 30D of the frame 30 in the movable element 2. In this state, the assembling of the contents in the frame 30 is completed.
  • the coil 4B is fixed to the inner surface 31A of the lid 31 in advance, and the suction plate 32 is attached to the inner surface 31A as necessary.
  • the lid body 31 to which the coil 4B is fixed is attached to the frame body 30 with the inner side surface 31A facing the bottom surface 30A.
  • the assembly process of the linear vibration motor 1 is completed by connecting the lead wires of the coils 4A and 4B to the input terminal portion 30F of the frame 30.
  • a drive unit is configured by the coils 4 ⁇ / b> A and 4 ⁇ / b> B fixed to the support surfaces 3 ⁇ / b> A and 3 ⁇ / b> B of the housing 3 and the magnet unit 2 ⁇ / b> A of the mover 2.
  • the mover 2 is stationary at the vibration center position where the elastic force of the elastic member 5 is balanced.
  • the coil 4A, 4B is supplied with a driving current whose current directions are opposite and synchronized, a driving force (Lorentz force) in the X direction is applied to the magnet portion 2A, and this driving force and the elastic repulsive force of the elastic member 5 are applied.
  • the mover 2 reciprocates along a uniaxial direction (X direction in the drawing).
  • the drive current supplied to the coils 4A and 4B is preferably an alternating current having a resonance frequency determined by the mass of the mover 2 and the elastic coefficient of the elastic member 5.
  • FIG. 3 shows a linear vibration motor according to another embodiment of the present invention.
  • the movable element 2 includes a side weight body 23 as a weight portion 2B.
  • the side weights 23 are provided on both sides in the Y direction (width direction) of the magnet portion 2A.
  • the side weights 23 are joined to or integrally formed with the weights 20 provided on both sides in the X direction (vibration direction) in the figure.
  • the side weight body 23 is for increasing the mass of the mover 2 and is formed of a material having a high specific gravity such as tungsten, like the weight body 20.
  • the movable element 2 has the same width in the Y direction (width direction) in the portion where the side weight body 23 is provided and the portion where the weight body 20 is provided.
  • This linear vibration motor 1A has a structure in which the magnet portion 2A of the mover 2 is disposed between the pair of coils 4A and 4B, as in the above-described embodiment, so that both sides of the magnet portion 2A in the width direction are provided. A space for arranging the side weight bodies 23 can be secured. Such a linear vibration motor 1 ⁇ / b> A can generate an effective vibration in which the mass of the mover 2 is increased with the same driving force as that of the above-described embodiment.
  • the linear vibration motors 1 and 1A described above can be reduced in thickness by reducing the dimension in the thickness direction (Z direction in the figure) relative to the dimension in the width direction (Y direction in the figure) of the mover 2 and the housing 3. Is possible.
  • the magnet portion 2A of the mover 2 is disposed between the pair of coils 4A and 4B disposed in the housing 3, even if the structure is thinned, the magnet 4A contacts the coils 4A and 4B.
  • the movable element 2 can be easily arranged in the housing 3 without doing so.
  • the linear vibration motors 1 and 1A have good workability at the time of assembly, and production with a high yield is possible by suppressing the occurrence of defects such as coil disconnection.
  • FIG. 4 shows a portable information terminal 100 as an example of an electronic apparatus equipped with the linear vibration motors 1 and 1A according to the embodiment of the present invention.
  • the portable information terminal 100 including the linear vibration motors 1 and 1A that can obtain a stable vibration and can be thinned and compact in the width direction generates an abnormal sound at the start and end of an operation such as an incoming call or an alarm function in a communication function. It can be transmitted to the user with stable vibration that is difficult to perform. Further, the portable information terminal 100 pursuing high portability or design can be obtained by making the linear vibration motor 1 thin and compact in the width direction.
  • the linear vibration motors 1 and 1A have a compact shape in which each part is housed in a rectangular parallelepiped housing 3 with a reduced thickness, the linear vibration motors 1 and 1A should be efficiently installed in the thinned portable information terminal 100. Can do.

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

Abstract

La présente invention élimine les contraintes relatives à une procédure d'assemblage dans un moteur à vibration linéaire, réduit au minimum l'apparition de défauts de production comme une rupture de bobine et améliore ainsi la maniabilité au moment de l'assemblage dans un moteur à vibration linéaire qui est approprié pour une réduction de l'épaisseur. Un moteur à vibration linéaire (1) comporte : un élément mobile (2) doté d'un aimant (2A) et d'un poids (2B) ; un logement (3) destiné à loger l'élément mobile (2) ; une paire de bobines (4A, 4B) destinées à appliquer une force d'entraînement qui amène l'élément mobile (2) à vibrer sur l'aimant (2A) ; et un élément élastique (5) destiné à appliquer une force élastique qui repousse la force d'entraînement vers l'élément mobile (2), ledit élément élastique (5) étant disposé à l'intérieur du logement (3). Le logement (3) comporte une paire de surfaces de support (3A, 3B) le long de la direction de vibration de l'élément mobile (2). Les bobines de la paire de bobines (4A, 4B) sont fixées à chaque surface de la paire de surfaces de support (3A, 3B) et l'aimant (2A) est intercalé entre elles.
PCT/JP2016/077953 2015-09-25 2016-09-23 Moteur à vibration linéaire WO2017051843A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201680054467.1A CN108028591A (zh) 2015-09-25 2016-09-23 线性振动马达

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015-188792 2015-09-25
JP2015188792A JP2017063583A (ja) 2015-09-25 2015-09-25 リニア振動モータ

Publications (1)

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WO2017051843A1 true WO2017051843A1 (fr) 2017-03-30

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JP (1) JP2017063583A (fr)
CN (1) CN108028591A (fr)
WO (1) WO2017051843A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210273543A1 (en) * 2018-07-11 2021-09-02 Minebea Mitsumi Inc. Vibration actuator and electronic apparatus
US11843297B2 (en) 2020-09-30 2023-12-12 Minebea Mitsumi Inc. Rotating vibration actuator with a weight and electronic apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019012409A (ja) * 2017-06-30 2019-01-24 日本電産サンキョー株式会社 入力装置
CN111542402B (zh) 2018-02-01 2022-04-26 安达满纳米奇精密宝石有限公司 线性振动促动器

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JP2003117489A (ja) * 2001-10-10 2003-04-22 Citizen Electronics Co Ltd 軸方向駆動の振動体
JP2004104906A (ja) * 2002-09-09 2004-04-02 Tokyo Parts Ind Co Ltd ２個の励磁コイルを有する駆動回路内蔵型筒型振動体とその搭載構造
JP2010069470A (ja) * 2008-08-22 2010-04-02 Sanyo Electric Co Ltd リニアモータおよびリニアモータを備えた携帯機器
US20100213773A1 (en) * 2009-02-20 2010-08-26 Aac Acoustic Technologies (Shenzhen) Co., Ltd Linear Vibrator
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JP4875133B2 (ja) * 2009-10-29 2012-02-15 日本電産コパル株式会社 振動アクチュエータ
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Publication number Priority date Publication date Assignee Title
JP2003117489A (ja) * 2001-10-10 2003-04-22 Citizen Electronics Co Ltd 軸方向駆動の振動体
JP2004104906A (ja) * 2002-09-09 2004-04-02 Tokyo Parts Ind Co Ltd ２個の励磁コイルを有する駆動回路内蔵型筒型振動体とその搭載構造
JP2010069470A (ja) * 2008-08-22 2010-04-02 Sanyo Electric Co Ltd リニアモータおよびリニアモータを備えた携帯機器
US20100213773A1 (en) * 2009-02-20 2010-08-26 Aac Acoustic Technologies (Shenzhen) Co., Ltd Linear Vibrator
JP2012016153A (ja) * 2010-06-30 2012-01-19 Nidec Copal Corp 振動アクチュエータ

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210273543A1 (en) * 2018-07-11 2021-09-02 Minebea Mitsumi Inc. Vibration actuator and electronic apparatus
US12046975B2 (en) * 2018-07-11 2024-07-23 Minebea Mitsumi Inc. Vibration actuator and electronic apparatus
US11843297B2 (en) 2020-09-30 2023-12-12 Minebea Mitsumi Inc. Rotating vibration actuator with a weight and electronic apparatus

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Publication number Publication date
JP2017063583A (ja) 2017-03-30
CN108028591A (zh) 2018-05-11

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