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WO2019102704A1 - Moteur à vibration linéaire et appareil électronique - Google Patents

Moteur à vibration linéaire et appareil électronique Download PDF

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Publication number
WO2019102704A1
WO2019102704A1 PCT/JP2018/034961 JP2018034961W WO2019102704A1 WO 2019102704 A1 WO2019102704 A1 WO 2019102704A1 JP 2018034961 W JP2018034961 W JP 2018034961W WO 2019102704 A1 WO2019102704 A1 WO 2019102704A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnet
coil
vibration motor
linear vibration
mover
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2018/034961
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English (en)
Japanese (ja)
Inventor
片田　好紀
大祐 福田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nidec Precision Corp
Original Assignee
Nidec Copal Corp
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 Nidec Copal Corp filed Critical Nidec Copal Corp
Publication of WO2019102704A1 publication Critical patent/WO2019102704A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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 and an electronic device provided with the linear vibration motor.
  • a vibration motor (or vibration actuator) is incorporated in a portable electronic device, widely used as a device for transmitting a signal such as an incoming call or an alarm to a portable person by vibration, and it is used in wearable electronic devices worn and carried by a portable person. Has become an essential device.
  • the vibration motor is a device that realizes haptics (skin sensory feedback) in a human interface such as a touch panel.
  • a linear vibration motor that can generate relatively large vibrations due to linear reciprocating vibration of the mover has attracted attention.
  • a conventional linear vibration motor includes a mover integrally including a weight and two magnets, a leaf spring that vibratably supports the mover, and a mover.
  • the coil has a coil facing the magnet on one side in a direction intersecting with the vibration direction, and the mover is reciprocally vibrated by the Lorentz force when the coil is energized.
  • the two magnets are formed in a flat rectangular parallelepiped shape, and the plane side of one of the magnets is an N pole, whereas the plane side of the other magnet is an S pole.
  • the magnetic flux of the magnet integrated with the mover may leak out of the case and adversely affect external devices (for example, a transceiver, a SIM card, etc.). Therefore, it is conceivable to magnetically shield the case by using a magnetic material, but in such a case, the magnet is magnetically attracted to the case, and the mover oscillates in the cross direction with respect to the desired vibration direction, It may cause contact noise or vibration noise.
  • the present invention comprises the following composition.
  • a mover integrally including a weight and a coil, an elastic body that vibratably supports the mover, and a first magnet facing the coil on one side in a direction intersecting with the vibration direction of the mover;
  • the second magnet facing the coil on the other side in the same cross direction and a magnetic member for fixing each magnet are provided, and the mover is vibrated by the magnetic force generated when the coil is energized.
  • Linear vibration motor integrally including a weight and a coil, an elastic body that vibratably supports the mover, and a first magnet facing the coil on one side in a direction intersecting with the vibration direction of the mover;
  • the second magnet facing the coil on the other side in the same cross direction and a magnetic member for fixing each magnet are provided, and the mover is vibrated by the magnetic force generated when the coil is energized.
  • Linear vibration motor Linear vibration motor.
  • the linear vibration motor 1 includes a mover 10 integrally including a weight 11 and a coil 12, an elastic body 20 that vibratably supports the mover 10, and a mover 10.
  • a first magnet 30 facing the end face of the coil 12 on one side orthogonal to the vibration direction (the X direction according to the illustrated example) and a coil 12 end face on the other side of the orthogonal direction
  • magnetic members 51 and 52 which fix the first and second magnets 30 and 40 from both sides in the orthogonal direction, and flexible to supply power to the coil 12 Power supply wiring 60 and a cover member 70 covering these members, and when the coil 12 is energized, the mover 10 is reciprocated linearly in one axial direction due to the magnetic force generated.
  • the mover 10 is formed by integrally fixing the coil 12 to the weight 11.
  • the weight 11 is made of a metal material (for example, tungsten) having a high specific gravity, and according to the illustrated example, is formed in a frame shape elongated in the vibration direction. And the hollow part 11a which opened one side and the other side of the thickness direction orthogonal to a vibration direction is provided in the planar view center side of this weight 11. As shown in FIG. Moreover, the coil fixing
  • the first magnet 30 is inserted into the opening on one side and the second magnet 40 is inserted into the opening on the other side, and weights around the first magnet 30 and the second magnet 40 A space for vibrating the body 11 is secured (see FIGS. 2 to 4).
  • the first magnet 30 and the second magnet 40 are inserted into the hollow portion 11a in a non-contact state with play in the vibration direction.
  • Each coil fixing portion 11 b is a concave portion formed in the side wall of the weight 11, and the side end of the coil 12 is mounted.
  • the coil 12 is a flat air core coil in which one half side 12a and the other half side 12b sandwiching the air core are disposed on both sides in the vibration direction, and the central axis thereof is in the thickness direction of the weight 11 It fixes and fixes to the approximate center of the vibration direction and thickness direction of the weight 11 so as to substantially match. More specifically, the coil 12 is provided in the form of a bridge across the hollow portion 11a, and one end side and the other end side thereof are respectively fitted to the coil fixing portions 11b of the weight 11 and fixed by adhesion.
  • Each elastic body 20 is a plate spring in which an elastically bendable plate is formed in a predetermined bending shape, and according to an example shown in FIG. 4, fixed to the outer surface of the weight 11 near the end in the vibration direction Connecting pieces that connect the one end sides of the fastening pieces 21 and 22, and the fastening pieces 22 fastened to the inner surface of the side wall 72 (or 73) of the cover member 70; And is formed in a U-shape in plan view along the end side of the weight 11 in the vibration direction.
  • the elastic body 20 elastically bends and deforms a bent portion between the fastening piece 21 and the connecting piece 23 and a bending portion between the connecting piece 23 and the fastening piece 22.
  • the first magnet 30 has a magnet piece 31 in which one magnetic pole (for example, the N pole) is opposed to one half side 12a of the coil 12 (the left half side according to FIG. 2)
  • the magnetic pole (for example, S pole) is comprised from the magnet piece 32 which made the other half part side 12b (according to FIG. 2 right half part side) of the coil 12 be opposite.
  • the two magnet pieces 31 and 32 are permanent magnets of the same shape and of the same material, and are disposed at intervals in the vibration direction so that the magnetic poles are reverse as described above.
  • the magnet pieces 31 and 32 are adhered and fixed to the coil side surface of the magnetic member 51 with a predetermined clearance between the magnet pieces 31 and 32 and the end surface of the coil 12.
  • the second magnet 40 is disposed point-wise so that the direction of the magnetic pole is reversed with respect to the first magnet 30 in the cross direction to the vibration direction (the thickness direction of the weight 11 according to the illustrated example). It consists of the two magnet pieces 41 and 42 (refer FIG. 2).
  • the magnet pieces 41 and 42 are the same members as the magnet pieces 31 and 32, and a predetermined clearance is secured between the magnet pieces 31 and 32, and the magnet pieces 41 and 42 are adhered and fixed to the coil side surface of the magnetic member 52.
  • the magnetic members 51 and 52 are flat plate-like magnetic materials (iron, magnetic stainless steel, etc.) covering the surfaces of the first magnet 30 and the second magnet 40 on the opposite coil side (in other words, the opposite side to the coil side) While increasing the magnetic force of each of the magnets 30 and 40 and preventing the magnetic flux from leaking to the side opposite to the coil.
  • the surface of the one magnetic member 51 on the side opposite to the coil is adhered and fixed to the inner surface of the cover member 70.
  • the other magnetic member 52 is fixed to cover the opening of the cover member 70 and also functions as a case member.
  • the feed wiring 60 is a flexible electric wiring material for supplying power to the coil 12, and according to a preferred example of the present embodiment, a tape-like flexible wiring substrate (TAB (Tape Automated Bonding) and (It may be called).
  • TAB Tap-like flexible wiring substrate
  • the feed wiring 60 is provided along one elastic body 20 (a plate spring) so as to be bent along with the vibration of the mover 10. According to an example shown in FIG. 4 and FIG. 5, the feed wire 60 is superimposed in a substantially L shape on the outer surfaces of the fastening piece 21 and the connecting piece 23 of the elastic body 20. The other end side terminal is exposed to the outside from between the cover portion 51 and the base portion 52.
  • the cover member 70 is formed in a box shape with a lower opening, and has a rectangular top wall 71, side walls 72 and 73 projecting downward from both ends of the top wall 71, and front and rear of the top wall 71. It has a front wall 74 and a rear wall 75 protruding downward from the end.
  • the cover member 70 is connected to the peripheral end of the magnetic member 52 so as to cover the above-described members.
  • the mover 10 in an initial state in which the coil 12 is not energized, the mover 10 is biased approximately equally by the elastic members 20 on both sides, and is positioned approximately at the center of the cover member 70. Therefore, as shown in FIG. 6A, the half side 12a of the coil 12 is positioned between the magnet piece 31 of the first magnet 30 and the magnet piece 42 of the second magnet 40, and The other half 12 b of the coil 12 is positioned between the magnet piece 32 of the first magnet 30 and the magnet piece 41 of the second magnet 40.
  • the mover 10 reciprocates in the X direction and the anti-X direction by the magnetic action between the coil 12 and the first magnet 30 and the second magnet 40. Vibrate.
  • the magnetic flux generated during the reciprocation is magnetically shielded by the magnetic members 51 and 52 and hardly leaks to the outside.
  • the half-portion side 12a of the coil 12 includes one magnet piece 31 or 42 and the other magnet piece 32 or 41 in the vibration direction.
  • the direction of the magnetic lines of force M3 between the magnet pieces 31 and 32 on both sides of the first magnet 30 is the X direction with respect to the direction (anti-Y direction) of the current flowing through the half side 12a. Therefore, a Lorentz force in the Z direction is generated on the half side 12a, but the direction of the magnetic line of force M4 between the magnet pieces 41 and 42 on both sides of the second magnet 40 is the anti-X direction.
  • An anti-Z direction Lorentz force is also generated on the side 12a, and these two opposite Lorentz forces are offset. Therefore, the mover 10 can be prevented from swinging in the Z direction or the anti-Z direction while moving in the one direction.
  • the linear vibration motor 1 configured as described above, it is possible to reduce the leakage magnetic flux, and in addition, it is possible to suppress the swing of the mover 10 in the direction crossing the desired vibration direction. Can be smoothly reciprocated in a straight line, and the movement of the mover 10 can be stabilized and the noise can be reduced.
  • FIG. 7 exemplifies a portable information terminal 100 as an electronic device provided with the linear vibration motor 1 according to the embodiment of the present invention.
  • the portable information terminal 100 is configured to vibrate the linear vibration motor 1 according to the reception of an external signal, the touch operation of a touch operation panel (including a touch display), etc., and the leakage of magnetic flux from the linear vibration motor 1 In addition to reducing adverse effects on the handset and SIM card, it is possible to reduce noise and noise when the linear vibration motor 1 vibrates.
  • a wearable computer a tablet personal computer, a game machine, or the like may be used other than the illustrated example.
  • each of the 1st magnet 30 and the 2nd magnet 40 was comprised by two magnet pieces, as another example, it is like the linear vibration motor 2 shown in FIG. It is also possible to replace the first magnet 30 and the second magnet 40 with a first magnet 30 'and a second magnet 40' consisting of a single piece of magnet, respectively.
  • the first magnet 30 ′ is an integral permanent magnet having an N pole on one end side in the vibration direction and an S pole on the other end side, and ensures a predetermined clearance with the end face of the coil 12. And adhesively fixed to the magnetic member 51.
  • the second magnet 40 ' is a permanent magnet having the same shape and the same material as the first magnet 30', and is disposed point-symmetrically to reverse the direction of the magnetic pole with respect to the first magnet 30 '.
  • the magnetic member 52 is adhesively fixed to the magnetic member 52 while maintaining a predetermined clearance with the coil 12.
  • the electric power feeding wiring 60 was overlap
  • the linear vibration motor 3 shown in FIG. 9 is obtained by replacing the power supply wiring 60 in the linear vibration motor 1 with a power supply wiring 60 ′.
  • the feed wiring 60 ' is an L-shaped flexible wiring substrate (TAB) similar to the feed wiring 60, and the thickness direction of the weight 11 (in the reverse Z direction according to FIG. 9) with respect to one elastic body 20. ) Is provided so as to be bent and deformed at the shifted position. Therefore, according to the linear vibration motor 3, interference of the power supply wiring 60 'with the elastic body 20 can be reduced, and noise reduction and durability can be improved.
  • the power supply wiring 60 in the linear vibration motor 1 is replaced with a power supply wiring 60 ′ ′.
  • the feed wiring 60 ′ ′ is formed of a flexible wiring substrate (TAB), a connection piece 61 ′ ′ along the side surface of the weight 11 and having one end electrically connected to the coil 12, and the connection piece 61 ′ ′.
  • the first extending piece portion 62 ′ ′ bent in a substantially L shape and extended to the other end side, and the first extending piece portion 62 ′ ′ further bent in a substantially V shape and extended And a second extension piece 63 ′ ′.
  • the feed wiring 60 ′ ′ is provided so as to be bent and deformed at a position shifted to the thickness direction of the weight 11 (anti-Z direction according to FIG. 10) with respect to one elastic body 20.
  • the terminal on the end side of the mounting piece 63 ′ ′ is exposed to the outside. Therefore, according to the linear vibration motor 3, the interference of the feed wire 60 ′ ′ with the elastic body 20 can be reduced, and the feed wire 60 ′ ′ is the first extended piece portion 62 ′ ′ and the second extended piece portion 63. And so on, which can further improve quietness, durability, and the like.
  • the elastic body 20 is a plate spring as a particularly preferable aspect.
  • rubber, a coil spring, or the like can be used as another example of the elastic body 20.
  • the magnetic member 51 on the first magnet 30 side is formed in a flat plate shape, but as another example, the magnetic member 51 is omitted, and the cover member 70 is formed of a magnetic material.
  • the first magnet 30 may be bonded and fixed to the inner surface of the top wall 71 of the cover member 70.

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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

La présente invention réduit un flux magnétique de fuite et supprime l'oscillation d'un élément mobile dans la direction d'intersection par rapport à une direction de vibration souhaitée. La présente invention est pourvue : d'un élément mobile 10 ayant d'un seul tenant un corps de poids 11 et une bobine 12 ; d'un corps élastique 20 qui supporte l'élément mobile 10 de telle sorte que l'élément mobile peut vibrer ; d'un premier aimant 30 qui fait face à la bobine 12 sur un premier côté dans la direction d'intersection par rapport à la direction de vibration de l'élément mobile 10 ; d'un second aimant 40 qui fait face à la bobine 12 sur l'autre côté dans la direction d'intersection ; et d'éléments magnétiques 51, 52 qui fixent les aimants, respectivement. L'élément mobile 10 est amené à vibrer en raison d'une force magnétique qui est générée lorsque la bobine 12 est excitée.
PCT/JP2018/034961 2017-11-22 2018-09-21 Moteur à vibration linéaire et appareil électronique Ceased WO2019102704A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017224513A JP7079590B2 (ja) 2017-11-22 2017-11-22 リニア振動モータ及び電子機器
JP2017-224513 2017-11-22

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WO2019102704A1 true WO2019102704A1 (fr) 2019-05-31

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110868038A (zh) * 2019-08-13 2020-03-06 浙江省东阳市东磁诚基电子有限公司 一种弹片式水平线性马达结构
CN110957880A (zh) * 2019-12-26 2020-04-03 浙江省东阳市东磁诚基电子有限公司 一种小型线性马达结构及其实现方法
CN112234789A (zh) * 2019-12-10 2021-01-15 天津富禄通信技术有限公司 单轴方向水平线性震动马达
WO2021253749A1 (fr) * 2020-06-17 2021-12-23 池州市弘港科技电子有限公司 Vibreur basse fréquence à double entraînement de super-basse miniature
CN114583914A (zh) * 2020-11-30 2022-06-03 日本电产株式会社 线性致动器
CN114629325A (zh) * 2020-12-14 2022-06-14 日本电产株式会社 振动马达
CN115150493A (zh) * 2022-07-26 2022-10-04 维沃移动通信有限公司 电子设备

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN213461503U (zh) * 2020-09-28 2021-06-15 瑞声科技(新加坡)有限公司 线性马达
CN214228101U (zh) * 2020-12-30 2021-09-17 歌尔股份有限公司 线性振动马达和电子设备
CN217216887U (zh) * 2022-03-29 2022-08-16 瑞声光电科技(常州)有限公司 一种多功能发声器件
CN117041832A (zh) * 2023-08-18 2023-11-10 美特科技(苏州)有限公司 电子装置

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US20110133577A1 (en) * 2008-08-18 2011-06-09 In Ho Lee Horizontal linear vibration device
US20130082546A1 (en) * 2011-09-30 2013-04-04 Samsung Electro-Mechanics Co., Ltd. Linear vibration motor
JP2015057041A (ja) * 2013-09-12 2015-03-23 ビュルケルト ヴェルケ ゲーエムベーハーＢｕｅｒｋｅｒｔ Ｗｅｒｋｅ ＧｍｂＨ エレクトロダイナミックアクチュエータ
US20170288521A1 (en) * 2016-03-29 2017-10-05 Jinlong Machinery & Electronics Co., Ltd Linear motor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110133577A1 (en) * 2008-08-18 2011-06-09 In Ho Lee Horizontal linear vibration device
US20130082546A1 (en) * 2011-09-30 2013-04-04 Samsung Electro-Mechanics Co., Ltd. Linear vibration motor
JP2015057041A (ja) * 2013-09-12 2015-03-23 ビュルケルト ヴェルケ ゲーエムベーハーＢｕｅｒｋｅｒｔ Ｗｅｒｋｅ ＧｍｂＨ エレクトロダイナミックアクチュエータ
US20170288521A1 (en) * 2016-03-29 2017-10-05 Jinlong Machinery & Electronics Co., Ltd Linear motor

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110868038A (zh) * 2019-08-13 2020-03-06 浙江省东阳市东磁诚基电子有限公司 一种弹片式水平线性马达结构
CN112234789A (zh) * 2019-12-10 2021-01-15 天津富禄通信技术有限公司 单轴方向水平线性震动马达
CN112234789B (zh) * 2019-12-10 2022-09-20 天津富禄通信技术有限公司 单轴方向水平线性震动马达
CN110957880A (zh) * 2019-12-26 2020-04-03 浙江省东阳市东磁诚基电子有限公司 一种小型线性马达结构及其实现方法
CN110957880B (zh) * 2019-12-26 2021-11-09 浙江省东阳市东磁诚基电子有限公司 一种小型线性马达结构及其实现方法
WO2021253749A1 (fr) * 2020-06-17 2021-12-23 池州市弘港科技电子有限公司 Vibreur basse fréquence à double entraînement de super-basse miniature
CN114583914A (zh) * 2020-11-30 2022-06-03 日本电产株式会社 线性致动器
CN114583914B (zh) * 2020-11-30 2024-04-19 日本电产株式会社 线性致动器
CN114629325A (zh) * 2020-12-14 2022-06-14 日本电产株式会社 振动马达
CN115150493A (zh) * 2022-07-26 2022-10-04 维沃移动通信有限公司 电子设备
CN115150493B (zh) * 2022-07-26 2025-04-11 维沃移动通信有限公司 电子设备

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JP7079590B2 (ja) 2022-06-02
JP2019093336A (ja) 2019-06-20

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