WO2019044127A1 - Linear vibration motor and electronic apparatus - Google Patents

Linear vibration motor and electronic apparatus Download PDF

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Publication number
WO2019044127A1
WO2019044127A1 PCT/JP2018/023427 JP2018023427W WO2019044127A1 WO 2019044127 A1 WO2019044127 A1 WO 2019044127A1 JP 2018023427 W JP2018023427 W JP 2018023427W WO 2019044127 A1 WO2019044127 A1 WO 2019044127A1
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Prior art keywords
mover
vibration
vibration motor
magnet
movable element
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PCT/JP2018/023427
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French (fr)
Japanese (ja)
Inventor
栞 久信田
Original Assignee
日本電産コパル株式会社
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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 CN201890001155.9U priority Critical patent/CN211830531U/en
Publication of WO2019044127A1 publication Critical patent/WO2019044127A1/en

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    • 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.
  • a vibration motor has recently attracted attention as a device for realizing haptics (skin sensory feedback) in a human interface such as a touch panel.
  • Patent Document 1 describes a vibration actuator in which a mover is fixed to a side wall of a lid via a plate spring so as to elastically bend the plate spring with the vibration of the mover (weight). It is done.
  • the movable element includes: a movable element that vibrates; a plate spring that bends in the vibration direction of the movable element; a support that supports the flat spring on the vibration direction side; and a coil that vibrates the movable element
  • a magnet is provided at an end side in the vibration direction, and the plate spring connects one end side to the movable element and connects the other end side to the support portion, and between the one end side and the other end side
  • a linear vibration motor comprising: a bending piece which bends with vibration of the mover to move closer to or away from the magnet, and at least the bending piece is formed of a magnetic material.
  • the linear vibration motor 1 vibrates the mover 10 that vibrates, a box-like base 20 that supports the mover 10 in a vibratable manner, and the mover 10 along the base 20.
  • the coil 30 and the two leaf springs 40 and 40 elastically bent in the space on the vibration direction side of the mover 10 are provided.
  • the mover 10 is formed in a long shape in which the dimension in the cross direction to the vibration direction is longer than the dimension in the vibration direction.
  • the mover 10 includes a pair of magnets 11 and 11 positioned at both ends in the vibration direction, weights 12 and 12 fixed to both ends in the cross direction of the magnets 11 and 11, and magnets 11 and 11.
  • a yoke 13 fixed in the longitudinal direction is provided on the surface on the opposite side of the coil, and is supported so as to vibrate in the short direction (Y direction in the figure) via the plate springs 40 on both sides.
  • Each magnet 11 is formed in the shape of a rectangular solid elongated in the cross direction with respect to the vibration direction, and one of the directions (Z direction in the drawing) orthogonal to the surface of the coil 30 is N pole and the other is S pole.
  • the pair of magnets 11 and 11 are provided substantially in parallel with a predetermined gap.
  • One magnet 11 has a magnetic pole opposite to that of the other magnet 11.
  • the pair of magnets 11 and 11 are integrally fixed by a yoke 13.
  • the weight 12, 12 is formed in a substantially rectangular parallelepiped shape by a metal material having a high specific gravity (for example, tungsten) or the like.
  • a metal material having a high specific gravity for example, tungsten
  • each weight 12 abuts on a shock absorbing material 14 fixed to the inner surface of a cover 22 of a base 20 described later.
  • the buffer material 14 is formed in a block shape from an elastic material such as rubber, receives the mover 10 when it is vibrated, transmits its impact to the cover portion 22, and elastically deforms to prevent generation of vibration noise.
  • the yoke 13 is formed in a long shape so as to cover the side opposite to the coil of the pair of magnets 11 and 11 and has projecting pieces 13a and 13a protruding toward the coil 30 at both ends in the longitudinal direction.
  • Each protrusion 13 a is provided with a protrusion 13 a 1 for positioning and supporting the plate spring 40.
  • the yoke 13 is formed, for example, in a substantially concave shape in cross section by bending a substantially rectangular plate made of a magnetic metal material.
  • Each projecting piece 13a has a fitting piece 13a2 bent toward the center in the width direction (Y direction in the drawing), and the fitting piece 13a2 is sandwiched between a pair of magnets 11 and 11 And the magnets 11 and 11 are bonded via an adhesive.
  • the base 20 includes a base portion 21 for supporting and fixing the coil 30, and a cover portion 22 covering the periphery of the mover 10 and the side opposite to the coil, and in a long box shape along the coil 30 and the mover 10. Configured
  • the substrate portion 21 is formed in a substantially rectangular shape, and the terminal board 21a is made to project from the long side portion.
  • Two terminals T, T are provided on the surface of the terminal plate 21a, and the terminals T, T are electrically connected to both ends of the wire forming the coil 30, respectively.
  • the cover portion 22 is formed of a metal plate material in a rectangular box shape with the substrate portion 21 opened, and the flat plate portion 22a having a rectangular shape in plan view facing the substrate portion 21 with the mover 10 and the coil 30 interposed therebetween.
  • the four side walls 22b, 22b, 22c, and 22c that project from the four sides of the flat plate portion 22a toward the substrate portion 21 and surround the four sides of the mover 10 are provided.
  • the cover portion 22 is fixed by fitting the projecting ends of the side walls 22b, 22b, 22c, and 22c to the substrate portion 21.
  • two side walls 22b and 22b opposed on both sides in the vibration direction (Y direction in the drawing) of the mover 10 are respectively spaced in a direction perpendicular to the vibration direction (X direction in the drawing).
  • the two notches 22b1 and 22b1 are provided, and a space between these two notches 22b1 and 22b1 is used as a support 22d for supporting the plate spring 40.
  • the supporting portion 22 d is projected between the flat plate portion 22 a side to the substrate portion 21 side so as to be located between the two slit-like notched portions 22 b 1, and the projecting end portion, the opposing substrate portion 21 surface and the terminal plate A gap s1 is secured between the surface 21a and the surface 21a.
  • the support portion 22d has the flat portion 22a as a fulcrum with the gap s1 side as the fulcrum by the force component in the X direction by the impact. It is slightly elastically deformed as it is rocked in the direction.
  • the elastic deformation of the support portion 22 d is smaller than the amount of deflection of the plate spring 40. That is, the rigidity in the cross direction (X direction in the drawing) of the support portion 22 d is set larger than the rigidity in the bending direction (Y direction in the drawing) of the plate spring 40.
  • the coil 30 is an air core coil which does not have a core material, is wound in a long flat shape, and places a substantially constant gap with respect to the surface on the side opposite to the yoke 13 of the pair of magnets 11 and 11. It is fastened to the part 21.
  • a driving signal composed of an alternating current or a pulse current having a resonance frequency (natural frequency) determined by the mass of the mover 10 and the elastic coefficient of the plate spring 40 is supplied to the coil 30 through the terminals T and T, for example. Be done.
  • Two plate springs 40 are point-symmetrically arranged so as to be respectively located in the space on both sides in the vibration direction of the mover 10 (see FIG. 4).
  • Each leaf spring 40 has one end connected to the mover 10 and the other end connected to the support 22d, and is bent between the one end and the other end along with the vibration of the mover 10 to the magnet 11 It has a bending piece portion 41 which approaches and separates, and this bending piece portion 41 is made of a magnetic material which can be attracted by the magnet 11.
  • the leaf spring 40 is formed by bending an elastic flexible long metal plate made of magnetic metal into a substantially L shape, and the short direction of the pair of magnets 11 and 11 (Y in the figure And the other attachment piece 42 fixed to the mover 10 at one end of the deflection piece 41, and the other deflection piece 41. And a fastening piece 43 fastened to the support 22d at the end.
  • the bending piece portion 41 is adjacent to the magnet 11 in the vibration direction, and is formed in an inclined piece shape that gradually separates from the magnet 11 from one end side to the other end side.
  • the bending piece portion 41 is positioned so as to be magnetically attracted by the magnet 11 when approaching the magnet 11.
  • a narrowed portion 41 a is provided near the center in the longitudinal direction of the bending piece portion 41 so as to gradually reduce the dimension in the thickness direction of the mover 10.
  • the constricted portion 41a is intended to disperse the stress applied to the bent portion, the connection portion and the like on both end sides, but can be omitted. Further, according to the illustrated example, only the bending piece portion 41 is provided in the space where the bending piece portion 41 is bent and deformed.
  • One fixing piece portion 42 is extended in a plate shape in a direction perpendicular to the vibration direction of the mover 10.
  • the fastening piece portion 42 is fixed by being sandwiched between the outer surface of the projecting portion 13a and the weight 12 by fitting the through-shaped fitting hole 42a to the convex portion 13a1 on the yoke 13 side.
  • This fixing means can be, for example, welding, adhesion or the like.
  • the other fastening piece portion 43 is formed in a plate shape substantially parallel to the side wall 22b of the cover portion 22, and is welded to the support portion 22d of the side wall 22b.
  • a shock absorbing material 44 made of an elastic material such as rubber is fixed on the back side (the opposite side of the support 22 d) of the fastening piece 43.
  • the cushioning material 44 prevents the plate spring 40 from coming into contact with the side surface of the magnet 11 to generate noise when the mover 10 vibrates.
  • FIG. 6 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 in response to a touch operation on the touch operation panel 50 (including a touch display), and the vibration damping performance is excellent. Therefore, for example, even in the case where the vibration and the stop of the portable information terminal 100 are repeated in response to the repetition of the quick touch operation, it is possible to obtain good responsiveness.
  • plate spring 40 and the support part 22d were each provided in the both sides of the vibration direction, the aspect which provided the leaf spring 40 and the support part 22d only in one side of the vibration direction as another example. It is also possible.
  • the other side with respect to the one side may have a configuration in which the mover 10 is supported by a structure other than illustrated, a configuration in which the mover 10 is not supported, or the like.
  • the entire plate spring 40 including the bending piece 41 is formed of a magnetic metal material, but as another example of the plate spring 40, only the bending piece 41 is formed of a magnetic metal material It is also possible to form the part (the fastening pieces 42, 43, etc.) of the above from a material other than the magnetic metal material.
  • the movable element 10 is vibrated in the lateral direction
  • the movable element may be vibrated in the longitudinal direction.
  • Linear vibration motor 10 Mover 11: Magnet 20: Base 21: Substrate 22: Cover 22d: Support 30: Coil 40: Flexible plate spring 41: Flexible piece 42, 43: Fastening piece 100 : Mobile information terminal (electronic equipment)

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

Abstract

The present invention improves vibration damping performance. The present invention is provided with: a movable element 10 that vibrates; a plate spring 40 that warps on the vibration direction side of the movable element 10; a supporting section 22d that supports the plate spring 40 on the vibration direction side; and a coil 30 that vibrates the movable element 10. The movable element 10 has a magnet 11 on the end section side in a vibration direction, the plate spring 40 has one end side that is connected to the movable element 10, and the other end side that is connected to the supporting section 22d, and has, between the one end side and the other end side, a warping piece 41 which comes close to and separates from the magnet 11 by warping with the vibration of the movable element 10. At least the warping piece 41 is formed of a magnetic material.

Description

リニア振動モータ及び電子機器Linear vibration motor and electronic equipment
　本発明は、リニア振動モータ、及びこのリニア振動モータを備えた電子機器に関するものである。 The present invention relates to a linear vibration motor and an electronic device provided with the linear vibration motor.
　振動モータ（或いは振動アクチュエータ）は、携帯電子機器に内蔵され、着信やアラームなどの信号発生等を振動によって携帯者に伝える装置として広く普及しており、携帯者が身につけて持ち運ぶウエアラブル電子機器においては、不可欠な装置になっている。また、振動モータは、タッチパネルなどのヒューマン・インターフェイスにおけるハプティクス（皮膚感覚フィードバック）を実現する装置として、近年注目されている。 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. In addition, a vibration motor has recently attracted attention as a device for realizing haptics (skin sensory feedback) in a human interface such as a touch panel.
　このような振動モータについて各種の形態が開発されている中で、可動子の直線的な往復振動によって比較的大きな振動を発生させることができるリニア振動モータが注目されている。リニア振動モータは、可動子側に錘とマグネットを設け、固定子側に設けたコイルに通電することでマグネットに作用するローレンツ力が駆動力となり、振動方向に沿って弾性支持される可動子を一軸方向に往復振動させるものである。
　例えば、特許文献１には、可動子（分銅）の振動に伴い板バネを弾性的に撓ませるように、可動子が板バネを介して蓋部の側壁に止着されている振動アクチュエータが記載されている。 While various forms of such vibration motors have been developed, a linear vibration motor that can generate relatively large vibrations due to linear reciprocating vibration of the mover has attracted attention. In a linear vibration motor, a weight and a magnet are provided on the mover side, and Lorentz force acting on the magnet becomes a driving force by energizing the coil provided on the stator side, and the mover elastically supported along the vibration direction It is made to reciprocate in a uniaxial direction.
For example, Patent Document 1 describes a vibration actuator in which a mover is fixed to a side wall of a lid via a plate spring so as to elastically bend the plate spring with the vibration of the mover (weight). It is done.
特開２０１７－１８９５８号公報JP 2017-18958 A
　ところで、上記従来技術によれば、コイルを通電状態から非通電状態にしても、可動子が慣性により自由振動を継続するため、その振動が完全に停止する迄にはある程度の時間を要する。このため、例えば、素早いタッチ操作の繰り返しに対応して電子機器の振動と停止を繰り返すような状況等においては、応答性の鈍さを感じさせてしまうおそれがある。 By the way, according to the above-mentioned prior art, even when the coil is energized or de-energized, the mover continues free vibration due to inertia, so it takes some time for the vibration to stop completely. For this reason, for example, in a situation where vibration and stop of the electronic device are repeated in response to repeated quick touch operation, there is a possibility that the responsiveness may be felt as slow.
　このような課題を解決するために、本発明は以下の構成を具備するものである。
　振動する可動子と、前記可動子の振動方向側で撓む板バネと、前記振動方向側で前記板バネを支持する支持部と、前記可動子を振動させるコイルとを備え、前記可動子は、振動方向の端部側にマグネットを有し、前記板バネは、一端側を前記可動子に接続するとともに他端側を前記支持部に接続し、これら一端側と他端側の間に、前記可動子の振動に伴い撓んで前記マグネットに対し近づいたり離れたりする撓み片部を有し、少なくともこの撓み片部を磁性材により形成していることを特徴とするリニア振動モータ。 In order to solve such a subject, the present invention comprises the following composition.
The movable element includes: a movable element that vibrates; a plate spring that bends in the vibration direction of the movable element; a support that supports the flat spring on the vibration direction side; and a coil that vibrates the movable element A magnet is provided at an end side in the vibration direction, and the plate spring connects one end side to the movable element and connects the other end side to the support portion, and between the one end side and the other end side, A linear vibration motor comprising: a bending piece which bends with vibration of the mover to move closer to or away from the magnet, and at least the bending piece is formed of a magnetic material.
本発明に係るリニア振動モータの一例を示す斜視図である。It is a perspective view showing an example of a linear vibration motor concerning the present invention. 同リニア振動モータを示す分解斜視図である。It is a disassembled perspective view which shows the linear vibration motor. 同リニア振動モータの縦断面図である。It is a longitudinal cross-sectional view of the linear vibration motor. 同リニア振動モータについて、基板部及びコイル等を省いた図であり、可動子が振動方向の略中央に位置する状態を示している。It is the figure which abbreviate | omitted the board | substrate part, the coil, etc. about the same linear vibration motor, and has shown the state to which the mover is located in the approximate center of the vibration direction. 同リニア振動モータについて、基板部及びコイル等を省いた図であり、可動子が振動方向の一方へ偏って位置する状態を示している。It is the figure which abbreviate | omitted the board | substrate part, the coil, etc. about the same linear vibration motor, and has shown the state which the mover has deviated to one side of a vibration direction. 同リニア振動モータを具備した電子機器の一例を示す斜視図である。It is a perspective view which shows an example of the electronic device which equipped the same linear vibration motor.
　以下、図面を参照して本発明の実施形態を説明する。以下の説明で異なる図における同一符号は同一機能の部位を示しており、各図における重複説明は適宜省略する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same reference numerals in different drawings denote portions having the same functions, and redundant description in each drawing will be appropriately omitted.
　リニア振動モータ１は、図１～図４に示すように、振動する可動子１０と、可動子１０を振動可能に支持する箱状の基体２０と、可動子１０を基体２０に沿って振動させるコイル３０と、可動子１０の振動方向側の空間で弾性的に撓む２つの板バネ４０，４０とを備える。 As shown in FIGS. 1 to 4, the linear vibration motor 1 vibrates the mover 10 that vibrates, a box-like base 20 that supports the mover 10 in a vibratable manner, and the mover 10 along the base 20. The coil 30 and the two leaf springs 40 and 40 elastically bent in the space on the vibration direction side of the mover 10 are provided.
　可動子１０は、振動方向に対する交差方向の寸法が、振動方向の寸法よりも長い長尺状に形成される。
　この可動子１０は、振動方向の両端側に位置する一対のマグネット１１，１１と、これらマグネット１１，１１の前記交差方向の両端側に固定された錘体１２，１２と、マグネット１１，１１の反コイル側の面に長手方向へわたって固定されたヨーク１３とを備え、両側の板バネ４０，４０を介して短手方向（図示のＹ方向）へ振動するように支持されている。 The mover 10 is formed in a long shape in which the dimension in the cross direction to the vibration direction is longer than the dimension in the vibration direction.
The mover 10 includes a pair of magnets 11 and 11 positioned at both ends in the vibration direction, weights 12 and 12 fixed to both ends in the cross direction of the magnets 11 and 11, and magnets 11 and 11. A yoke 13 fixed in the longitudinal direction is provided on the surface on the opposite side of the coil, and is supported so as to vibrate in the short direction (Y direction in the figure) via the plate springs 40 on both sides.
　各マグネット１１は、振動方向に対する交差方向へ長尺な直方体状に形成され、コイル３０面に対し直交する方向（図示のＺ方向）の一方をＮ極、他方をＳ極としている。
　一対のマグネット１１，１１は、所定の隙間を置いて略平行に設けられる。一方のマグネット１１は、他方のマグネット１１に対し磁極が逆になっている。
　これら一対のマグネット１１，１１は、ヨーク１３によって一体に固定されている。 Each magnet 11 is formed in the shape of a rectangular solid elongated in the cross direction with respect to the vibration direction, and one of the directions (Z direction in the drawing) orthogonal to the surface of the coil 30 is N pole and the other is S pole.
The pair of magnets 11 and 11 are provided substantially in parallel with a predetermined gap. One magnet 11 has a magnetic pole opposite to that of the other magnet 11.
The pair of magnets 11 and 11 are integrally fixed by a yoke 13.
　錘体１２，１２は、比重の高い金属材料（例えば、タングステン）などによって略直方体状に形成される。
　各錘体１２は、可動子１０が短手方向（図示のＹ方向）へ振動した際に、後述する基体２０のカバー部２２内面に固定された緩衝材１４に当接する。
　緩衝材１４は、ゴム等の弾性材料からブロック状に形成され、振動した際の可動子１０を受けてその衝撃をカバー部２２に伝達するとともに、弾性変形することにより振動音の発生を防ぐ。 The weight 12, 12 is formed in a substantially rectangular parallelepiped shape by a metal material having a high specific gravity (for example, tungsten) or the like.
When the mover 10 vibrates in the short direction (Y direction in the drawing), each weight 12 abuts on a shock absorbing material 14 fixed to the inner surface of a cover 22 of a base 20 described later.
The buffer material 14 is formed in a block shape from an elastic material such as rubber, receives the mover 10 when it is vibrated, transmits its impact to the cover portion 22, and elastically deforms to prevent generation of vibration noise.
　ヨーク１３は、一対のマグネット１１，１１の反コイル側面を覆う長尺状に形成され、その長手方向の両端側に、コイル３０側へ突出する突片部１３ａ，１３ａを有する。各突片部１３ａには、板バネ４０を位置決めし支持するための凸部１３ａ１が設けられる。
　このヨーク１３は、例えば、磁性金属材料からなる略矩形状の板材を曲げ加工することによって、断面略凹状に形成される。
　各突片部１３ａは、幅方向（図示のＹ方向）の中央寄りに曲げ形成された嵌合片部１３ａ２を有し、この嵌合片部１３ａ２を一対のマグネット１１，１１の間に挟み込んで、マグネット１１，１１に対し接着剤を介して接着されている。 The yoke 13 is formed in a long shape so as to cover the side opposite to the coil of the pair of magnets 11 and 11 and has projecting pieces 13a and 13a protruding toward the coil 30 at both ends in the longitudinal direction. Each protrusion 13 a is provided with a protrusion 13 a 1 for positioning and supporting the plate spring 40.
The yoke 13 is formed, for example, in a substantially concave shape in cross section by bending a substantially rectangular plate made of a magnetic metal material.
Each projecting piece 13a has a fitting piece 13a2 bent toward the center in the width direction (Y direction in the drawing), and the fitting piece 13a2 is sandwiched between a pair of magnets 11 and 11 And the magnets 11 and 11 are bonded via an adhesive.
　また、基体２０は、コイル３０を支持し固定する基板部２１と、可動子１０の周囲及び反コイル側面を覆うカバー部２２とを備え、コイル３０及び可動子１０に沿う長尺な箱状に構成される。 In addition, the base 20 includes a base portion 21 for supporting and fixing the coil 30, and a cover portion 22 covering the periphery of the mover 10 and the side opposite to the coil, and in a long box shape along the coil 30 and the mover 10. Configured
　基板部２１は、略長方形状に形成され、その長辺部分に端子板２１ａを突出させている。端子板２１ａの表面には２つの端子Ｔ，Ｔが設けられ、これら端子Ｔ，Ｔは、それぞれ、コイル３０を構成する線材の両端部に電気的に接続される。 The substrate portion 21 is formed in a substantially rectangular shape, and the terminal board 21a is made to project from the long side portion. Two terminals T, T are provided on the surface of the terminal plate 21a, and the terminals T, T are electrically connected to both ends of the wire forming the coil 30, respectively.
　カバー部２２は、金属製の板材から基板部２１側を開口した矩形箱状に形成され、可動子１０及びコイル３０を間に置いて基板部２１に対向する平面視長方形状の平板部２２ａと、この平板部２２ａの四辺側から基板部２１側へ突出して可動子１０の四方を囲む４つの側壁２２ｂ，２２ｂ，２２ｃ，２２ｃとを有する。このカバー部２２は、側壁２２ｂ，２２ｂ，２２ｃ，２２ｃの突端を基板部２１に嵌め合わせて固定される。 The cover portion 22 is formed of a metal plate material in a rectangular box shape with the substrate portion 21 opened, and the flat plate portion 22a having a rectangular shape in plan view facing the substrate portion 21 with the mover 10 and the coil 30 interposed therebetween. The four side walls 22b, 22b, 22c, and 22c that project from the four sides of the flat plate portion 22a toward the substrate portion 21 and surround the four sides of the mover 10 are provided. The cover portion 22 is fixed by fitting the projecting ends of the side walls 22b, 22b, 22c, and 22c to the substrate portion 21.
　前記４つの側壁のうち、可動子１０の振動方向（図示のＹ方向）の両側で対向する２つの側壁２２ｂ，２２ｂは、それぞれ、前記振動方向に対する直交方向（図示のＸ方向）へ間隔を置いた二つの切欠部２２ｂ１，２２ｂ１を有し、これら二つの切欠部２２ｂ１，２２ｂ１の間を、板バネ４０を支持するための支持部２２ｄにしている。 Of the four side walls, two side walls 22b and 22b opposed on both sides in the vibration direction (Y direction in the drawing) of the mover 10 are respectively spaced in a direction perpendicular to the vibration direction (X direction in the drawing). The two notches 22b1 and 22b1 are provided, and a space between these two notches 22b1 and 22b1 is used as a support 22d for supporting the plate spring 40.
　支持部２２ｄは、二つのスリット状の切欠部２２ｂ１の間に位置するようにして、平板部２２ａ側から基板部２１側へ突出しており、その突端部と、対向する基板部２１面及び端子板２１ａ面との間に、隙間ｓ１を確保している。
　このため、支持部２２ｄは、例えばリニア振動モータ１が落下衝撃等の比較的強い衝撃を受けた場合に、その衝撃によるＸ方向の力成分により、平板部２２ａ側を支点に隙間ｓ１側をＸ方向へ揺動させるようにして、若干弾性変形する。
　この支持部２２ｄの弾性変形は、板バネ４０の撓み量よりも小さい。すなわち、支持部２２ｄの前記交差方向（図示のＸ方向）の剛性が、板バネ４０の撓み方向（図示のＹ方向）の剛性よりも大きく設定されている。 The supporting portion 22 d is projected between the flat plate portion 22 a side to the substrate portion 21 side so as to be located between the two slit-like notched portions 22 b 1, and the projecting end portion, the opposing substrate portion 21 surface and the terminal plate A gap s1 is secured between the surface 21a and the surface 21a.
For this reason, when the linear vibration motor 1 receives a relatively strong impact such as a drop impact, for example, the support portion 22d has the flat portion 22a as a fulcrum with the gap s1 side as the fulcrum by the force component in the X direction by the impact. It is slightly elastically deformed as it is rocked in the direction.
The elastic deformation of the support portion 22 d is smaller than the amount of deflection of the plate spring 40. That is, the rigidity in the cross direction (X direction in the drawing) of the support portion 22 d is set larger than the rigidity in the bending direction (Y direction in the drawing) of the plate spring 40.
　コイル３０は、芯材を具備しない空芯コイルであり、長尺扁平状に巻回され、一対のマグネット１１，１１の反ヨーク１３側の面に対し略一定の隙間を置くようにして、基板部２１に止着されている。
　このコイル３０には、例えば、可動子１０の質量と板バネ４０の弾性係数で決まる共振周波数（固有振動数）を有する交番電流又はパルス電流からなる駆動信号が、端子Ｔ，Ｔを介して供給される。 The coil 30 is an air core coil which does not have a core material, is wound in a long flat shape, and places a substantially constant gap with respect to the surface on the side opposite to the yoke 13 of the pair of magnets 11 and 11. It is fastened to the part 21.
A driving signal composed of an alternating current or a pulse current having a resonance frequency (natural frequency) determined by the mass of the mover 10 and the elastic coefficient of the plate spring 40 is supplied to the coil 30 through the terminals T and T, for example. Be done.
　板バネ４０は、可動子１０の振動方向の両側の空間にそれぞれ位置するように、点対称に二つ配設される（図４参照）。
　各板バネ４０は、一端側を可動子１０に接続するとともに他端側を支持部２２ｄに接続し、これら一端側と他端側の間に、可動子１０の振動に伴い撓んでマグネット１１に対し近づいたり離れたりする撓み片部４１を有し、この撓み片部４１を、マグネット１１によって吸引可能な磁性材としている。 Two plate springs 40 are point-symmetrically arranged so as to be respectively located in the space on both sides in the vibration direction of the mover 10 (see FIG. 4).
Each leaf spring 40 has one end connected to the mover 10 and the other end connected to the support 22d, and is bent between the one end and the other end along with the vibration of the mover 10 to the magnet 11 It has a bending piece portion 41 which approaches and separates, and this bending piece portion 41 is made of a magnetic material which can be attracted by the magnet 11.
　詳細に説明すれば、板バネ４０は、弾性的に撓み可能な磁性金属製の長尺板材を、略Ｌ字状に折り曲げて形成され、一対のマグネット１１，１１の短手方向（図示のＹ方向）の端面に沿って斜めに延設された撓み片部４１と、この撓み片部４１の一端側で可動子１０に止着された止着片部４２と、同撓み片部４１の他端側で支持部２２ｄに止着された止着片部４３とを有する。 More specifically, the leaf spring 40 is formed by bending an elastic flexible long metal plate made of magnetic metal into a substantially L shape, and the short direction of the pair of magnets 11 and 11 (Y in the figure And the other attachment piece 42 fixed to the mover 10 at one end of the deflection piece 41, and the other deflection piece 41. And a fastening piece 43 fastened to the support 22d at the end.
　撓み片部４１は、振動方向においてマグネット１１に隣接しており、一端側から他端側へ向かってマグネット１１から徐々に離れる傾斜片状に形成される。この撓み片部４１は、マグネット１１に接近した際に、マグネット１１によって磁気吸引されるように位置している。
　この撓み片部４１の長手方向の中央寄りには、可動子１０の厚み方向の寸法を徐々に縮小する括れ部４１ａが設けられる。この括れ部４１ａは、両端側の曲げ部分や接続部分等に加わる応力を分散するものであるが、省くことも可能である。
　また、図示例によれば、この撓み片部４１が撓み変形する空間には、撓み片部４１のみが設けられている。言い換えれば、マグネット１１とカバー部２２の側壁２２ｂとの間であって、撓み片部４１のＸ方向の全長範囲には、撓み片部４１以外の部材が存在しない。したがって、撓み片部４１は、他の部材に干渉することなく撓み変形することが可能である。なお、図示例以外の他例としては、前記空間に、撓み片部４１以外の部材（例えば緩衝材やその他の部材等）が設けられた態様とすることも可能である。 The bending piece portion 41 is adjacent to the magnet 11 in the vibration direction, and is formed in an inclined piece shape that gradually separates from the magnet 11 from one end side to the other end side. The bending piece portion 41 is positioned so as to be magnetically attracted by the magnet 11 when approaching the magnet 11.
A narrowed portion 41 a is provided near the center in the longitudinal direction of the bending piece portion 41 so as to gradually reduce the dimension in the thickness direction of the mover 10. The constricted portion 41a is intended to disperse the stress applied to the bent portion, the connection portion and the like on both end sides, but can be omitted.
Further, according to the illustrated example, only the bending piece portion 41 is provided in the space where the bending piece portion 41 is bent and deformed. In other words, there is no member other than the bending piece portion 41 between the magnet 11 and the side wall 22 b of the cover portion 22 and in the entire length range of the bending piece portion 41 in the X direction. Therefore, the bending piece portion 41 can be bent and deformed without interfering with other members. In addition, it is also possible to set it as the aspect by which members (for example, shock absorbing material, other members etc.) other than the bending piece part 41 were provided in the said space as another example except the example of illustration.
　一方の止着片部４２は、可動子１０の振動方向に対する直交方向へ板状に延設されている。この止着片部４２は、貫通状の嵌合孔４２ａを、ヨーク１３側の凸部１３ａ１に嵌め合わせるようにして、突片部１３ａ外面と錘体１２の間に挟まれて固定されている。この固定手段は、例えば溶接や接着等とすることが可能である。 One fixing piece portion 42 is extended in a plate shape in a direction perpendicular to the vibration direction of the mover 10. The fastening piece portion 42 is fixed by being sandwiched between the outer surface of the projecting portion 13a and the weight 12 by fitting the through-shaped fitting hole 42a to the convex portion 13a1 on the yoke 13 side. . This fixing means can be, for example, welding, adhesion or the like.
　他方の止着片部４３は、カバー部２２の側壁２２ｂに略平行な板状に形成され、側壁２２ｂの支持部２２ｄに対し溶接されている。
　この止着片部４３の裏側（反支持部２２ｄ側）には、ゴム等の弾性材料からなる緩衝材４４が固定されている。この緩衝材４４は、可動子１０が振動した際に、板バネ４０がマグネット１１側面に当接して騒音が発生するのを防ぐ。 The other fastening piece portion 43 is formed in a plate shape substantially parallel to the side wall 22b of the cover portion 22, and is welded to the support portion 22d of the side wall 22b.
A shock absorbing material 44 made of an elastic material such as rubber is fixed on the back side (the opposite side of the support 22 d) of the fastening piece 43. The cushioning material 44 prevents the plate spring 40 from coming into contact with the side surface of the magnet 11 to generate noise when the mover 10 vibrates.
　次に上記構成のリニア振動モータ１について、その特徴的な作用効果を詳細に説明する。
　コイル３０に交流電力が供給されると、コイル３０と一対のマグネット１１，１１間の磁気作用によって可動子１０が短手方向へ往復動し、この往復動に伴い両側の板バネ４０，４０が弾性的に撓み、この往復動による振動が支持部２２ｄ等を介して基体２０に伝達される。 Next, the characteristic operation and effect of the linear vibration motor 1 having the above-described configuration will be described in detail.
When AC power is supplied to the coil 30, the mover 10 reciprocates in the short direction due to the magnetic action between the coil 30 and the pair of magnets 11, 11, and the plate springs 40, 40 on both sides are moved along with this reciprocation. The elastic deformation causes vibration due to the reciprocation to be transmitted to the base 20 through the support 22 d and the like.
　前記往復動中、図５に示すように、一方のマグネット１１の側面と、撓み片部４１との隙間ｓ２が狭まると、これらマグネット１１と撓み片部４１は、磁力によって引き合う。
　このため、コイル３０への電力供給を遮断して、可動子１０を振動状態から静止する際に、可動子１０の振動を、前述したマグネット１１と撓み片部４１の間の磁気吸引力により、急速に減衰させることができる。すなわち、可動子１０を静止する際の減衰性能が良好である。 During the reciprocation, as shown in FIG. 5, when the gap s2 between the side surface of one of the magnets 11 and the bending piece portion 41 is narrowed, the magnet 11 and the bending piece portion 41 are attracted by the magnetic force.
For this reason, when stopping the power supply to the coil 30 and stopping the mover 10 from the vibration state, the vibration of the mover 10 is caused by the magnetic attraction force between the magnet 11 and the bending piece portion 41 described above. It can be attenuated rapidly. That is, the damping performance at the time of stopping the mover 10 is good.
　次に、リニア振動モータ１を備えた電子機器について説明する。
　図６は、本発明の実施形態に係るリニア振動モータ１を備えた電子機器として、携帯情報端末１００を例示している。
　この携帯情報端末１００は、タッチ操作パネル５０（タッチディスプレイを含む）のタッチ操作に応じてリニア振動モータ１を振動させるように構成され、その振動の減衰性能が良好である。このため、例えば、素早いタッチ操作の繰り返しに対応して携帯情報端末１００の振動と停止を繰り返す場合でも、良好な応答性を得ることができる。 Next, an electronic device provided with the linear vibration motor 1 will be described.
FIG. 6 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 in response to a touch operation on the touch operation panel 50 (including a touch display), and the vibration damping performance is excellent. Therefore, for example, even in the case where the vibration and the stop of the portable information terminal 100 are repeated in response to the repetition of the quick touch operation, it is possible to obtain good responsiveness.
　なお、他例としては、タッチ操作パネル５０を具備しない電子機器にリニア振動モータ１を装備することも可能である。 As another example, it is also possible to equip the linear vibration motor 1 in an electronic device that does not have the touch operation panel 50.
　また、上記実施態様によれば、板バネ４０及び支持部２２ｄを振動方向の両側にそれぞれ設けたが、他例としては、板バネ４０及び支持部２２ｄを振動方向の一方側のみに設けた態様とすることも可能である。この場合、前記一方側に対する他方側は、可動子１０を図示以外の構造によって支持した構成や、可動子１０を支持しない構成等とすればよい。 Moreover, according to the said embodiment, although the leaf | plate spring 40 and the support part 22d were each provided in the both sides of the vibration direction, the aspect which provided the leaf spring 40 and the support part 22d only in one side of the vibration direction as another example. It is also possible. In this case, the other side with respect to the one side may have a configuration in which the mover 10 is supported by a structure other than illustrated, a configuration in which the mover 10 is not supported, or the like.
　また、上記実施態様において、板バネ４０は撓み片部４１を含む全体を磁性金属材料から形成したが、板バネ４０の他例としては、撓み片部４１のみを磁性金属材料から形成し、他の部分（止着片部４２，４３等）を磁性金属材料以外の材料から形成することも可能である。 In the above embodiment, the entire plate spring 40 including the bending piece 41 is formed of a magnetic metal material, but as another example of the plate spring 40, only the bending piece 41 is formed of a magnetic metal material It is also possible to form the part (the fastening pieces 42, 43, etc.) of the above from a material other than the magnetic metal material.
　また、上記実施態様によれば、可動子１０を短手方向へ振動させる態様としたが、他例としては、可動子を長手方向に振動させる態様とすることも可能である。 Further, according to the above embodiment, although the movable element 10 is vibrated in the lateral direction, as another example, the movable element may be vibrated in the longitudinal direction.
　以上、本発明の実施の形態について詳述してきたが、具体的な構成はこれらの実施の形態に限られるものではなく、本発明の要旨を逸脱しない範囲の設計の変更等があっても本発明に含まれる。また、上述の各実施の形態は、その目的及び構成等に特に矛盾や問題がない限り、互いの技術を流用して組み合わせることが可能である。 As mentioned above, although the embodiment of the present invention has been described in detail, the specific configuration is not limited to these embodiments, and even if there is a design change or the like within the scope of the present invention. Included in the invention. In addition, the respective embodiments described above can be combined with each other by utilizing the techniques of each other unless there is a contradiction or a problem in particular in the purpose, the configuration, and the like.
　１：リニア振動モータ
　１０：可動子
　１１：マグネット
　２０：基体
　２１：基板部
　２２：カバー部
　２２ｄ：支持部
　３０：コイル
　４０：撓む板バネ
　４１：撓み片部
　４２，４３：止着片部
　１００：携帯情報端末（電子機器） 1: Linear vibration motor 10: Mover 11: Magnet 20: Base 21: Substrate 22: Cover 22d: Support 30: Coil 40: Flexible plate spring 41: Flexible piece 42, 43: Fastening piece 100 : Mobile information terminal (electronic equipment)

Claims (5)

  1. 　振動する可動子と、前記可動子の振動方向側で撓む板バネと、前記振動方向側で前記板バネを支持する支持部と、前記可動子を振動させるコイルとを備え、
    　前記可動子は、振動方向の端部側にマグネットを有し、
    　前記板バネは、一端側を前記可動子に接続するとともに他端側を前記支持部に接続し、これら一端側と他端側の間に、前記可動子の振動に伴い撓んで前記マグネットに対し近づいたり離れたりする撓み片部を有し、少なくともこの撓み片部を磁性材により形成していることを特徴とするリニア振動モータ。     A movable element that vibrates, a leaf spring that bends in the vibration direction side of the movable element, a support portion that supports the leaf spring on the vibration direction side, and a coil that vibrates the movable element.
    The mover has a magnet on the end side in the vibration direction,
    The plate spring has one end connected to the mover and the other end connected to the support, and is bent with the vibration of the mover between the one end and the other end against the magnet What is claimed is: 1. A linear vibration motor comprising: a bending piece portion that approaches and separates, wherein at least the bending piece portion is formed of a magnetic material.
  2. 　前記撓み片部は、前記一端側から前記他端側へ向かって前記マグネットから徐々に離れる傾斜片状に形成されていることを特徴とする請求項１記載のリニア振動モータ。 The linear vibration motor according to claim 1, wherein the bending piece portion is formed in an inclined piece shape that gradually separates from the magnet from the one end side toward the other end side.
  3. 　前記マグネット、前記板バネ及び前記支持部が、前記振動方向の両側にそれぞれ設けられていることを特徴とする請求項１又は２記載のリニア振動モータ。 3. The linear vibration motor according to claim 1, wherein the magnet, the plate spring, and the support portion are provided on both sides in the vibration direction.
  4. 　前記撓み片部が撓み変形する空間には、前記撓み片部のみが設けられていることを特徴とする請求項１乃至３何れか１項記載のリニア振動モータ。 The linear vibration motor according to any one of claims 1 to 3, wherein only the bending piece portion is provided in a space where the bending piece portion is bent and deformed.
  5. 　請求項１～４何れか１項記載のリニア振動モータを備えた電子機器。 An electronic apparatus comprising the linear vibration motor according to any one of claims 1 to 4.
PCT/JP2018/023427 2017-08-29 2018-06-20 Linear vibration motor and electronic apparatus WO2019044127A1 (en)

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CN111641322A (en) * 2020-06-30 2020-09-08 歌尔股份有限公司 Vibration device and electronic apparatus

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