JP2019221046A - Vibration actuator - Google Patents

Vibration actuator Download PDF

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JP2019221046A
JP2019221046A JP2018116091A JP2018116091A JP2019221046A JP 2019221046 A JP2019221046 A JP 2019221046A JP 2018116091 A JP2018116091 A JP 2018116091A JP 2018116091 A JP2018116091 A JP 2018116091A JP 2019221046 A JP2019221046 A JP 2019221046A
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peripheral edge
weight
frame
outer peripheral
vibration actuator
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祐人 西元
Yuto Nishimoto
祐人 西元
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Nidec Precision Corp
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Nidec Copal Corp
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Priority to JP2018116091A priority Critical patent/JP2019221046A/en
Priority to PCT/JP2019/021149 priority patent/WO2019244577A1/en
Publication of JP2019221046A publication Critical patent/JP2019221046A/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
    • H02K33/02—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

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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

To provide a vibration actuator capable of obtaining a desired resonance at a driving current of a set resonance frequency.SOLUTION: A vibration actuator includes: a frame body; a coil fixed to the frame body; a magnetic pole section vibrating in one axial direction by a driving current input into the coil; a weight vibrating integrally with the magnetic pole section; and an elastic member swingably supporting the weight in one axial direction with respect to the frame body. The elastic member includes: a fixing section that has an outer peripheral edge fixed to one of the weight and the frame body, an inner peripheral edge fixed to the other of the weight and the frame body, and connecting section connecting the outer peripheral edge and the inner peripheral edge to fix each of the outer peripheral edge and the inner peripheral edge to one of the frame body and the weight; and an adjustment fixing section for fixing part of the elastic member to the frame body or the weight so as to adjust a resonance frequency with respect to a frequency of a driving current.SELECTED DRAWING: Figure 4

Description

本発明は、振動アクチュエータに関するものである。   The present invention relates to a vibration actuator.

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、振動アクチュエータは、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。   Vibration actuators are built into portable electronic devices and are widely used as devices that transmit signals such as incoming calls and alarms by vibration to the wearer, and are indispensable devices for wearable electronic devices worn and carried by the wearer. It has become. In recent years, a vibration actuator has attracted attention as a device that realizes haptics (skin sensation feedback) in a human interface such as a touch panel.

振動アクチュエータは、錘とバネを備えた可動子を固定子に振動自在に支持して、コイルとマグネットの一方を可動子側に取り付け、他方を固定子側に取り付けて、錘とバネによって定まる共振周波数（固有振動数）の駆動電流（駆動パルス）をコイルに通電することで、可動子を大きな振幅で振動させている。   The vibration actuator supports a mover with a weight and a spring on a stator so that it can vibrate freely, and attaches one of a coil and a magnet to the mover side, and attaches the other to the stator side. When a drive current (drive pulse) having a frequency (natural frequency) is supplied to the coil, the mover is vibrated with a large amplitude.

振動アクチュエータに用いられるバネとして、板状のバネ（板バネ）を用いるものが知られている。ここで用いられる板バネは、円盤状の弾性部材の中心部分と外周部分の一方が固定端となり他方が可動端となるように、中心部分と外周部分の間に線状の繋ぎ部を形成して、板面に交差する方向に沿って、外周部分に対して中心部分を移動可能にしたものである。   As a spring used for a vibration actuator, a spring using a plate-like spring (leaf spring) is known. The leaf spring used here forms a linear connecting portion between the central portion and the outer peripheral portion so that one of the central portion and the outer peripheral portion of the disc-shaped elastic member is a fixed end and the other is a movable end. Thus, the central portion can be moved relative to the outer peripheral portion along the direction intersecting the plate surface.

このような板バネを備えた振動アクチュエータは、固定子であるケースに板バネの外周縁を溶接などで接続し、可動子である分銅や磁石を板バネの内周縁に接続している（下記特許文献１参照）。   In a vibration actuator having such a leaf spring, an outer peripheral edge of the leaf spring is connected to a case, which is a stator, by welding or the like, and a weight or a magnet, which is a movable element, is connected to an inner peripheral edge of the leaf spring (see below). Patent Document 1).

特開２０１２−７１２１５号公報JP 2012-71215 A

前述した従来の振動アクチュエータは、板バネのバネ定数をｋ、可動子の質量をｍとすると、共振周波数（固有振動数）は、（ｋ／ｍ）1/2で表すことができるので、板バネのバネ定数や分銅の質量にばらつきがあると実際の共振周波数を設計値に合わせることができなくなる。特に、板バネは、板厚や繋ぎ部を形成する際の加工精度で、バネ定数が微妙に変わってしまうので、実際の共振周波数を設定値に合わせることが困難な問題があり、駆動電流として設定された共振周波数の信号を入力しても、所望の共振が得られない場合があった。 In the above-described conventional vibration actuator, when the spring constant of the leaf spring is k and the mass of the mover is m, the resonance frequency (natural frequency) can be represented by (k / m) 1/2. If the spring constant of the spring or the mass of the weight varies, the actual resonance frequency cannot be adjusted to the design value. In particular, the leaf spring has a problem that it is difficult to match the actual resonance frequency to the set value because the spring constant is slightly changed by the processing accuracy when forming the plate thickness and the connecting portion. In some cases, a desired resonance cannot be obtained even when a signal having a set resonance frequency is input.

本発明は、このような問題に対処するために提案されたものである。すなわち、板バネのバネ定数や分銅の質量に微妙なばらつきがある場合であっても、設定した共振周波数の駆動電流で所望の共振が得られる振動アクチュエータを提供すること、などを課題とする。   The present invention has been proposed to address such a problem. That is, it is an object to provide a vibration actuator which can obtain desired resonance with a drive current having a set resonance frequency even when the spring constant of the leaf spring or the mass of the weight has minute variations.

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。
枠体と、前記枠体に固定されたコイルと、前記コイルに入力される駆動電流によって一軸方向に振動する磁極部と、前記磁極部と一体に振動する分銅と、前記枠体に対して前記分銅を一軸方向に振動自在に支持する弾性部材とを備え、前記弾性部材は、前記分銅と前記枠体の一方に固定される外周縁と前記分銅と前記枠体の他方に固定される内周縁と、前記外周縁と前記内周縁の間を繋ぐ繋ぎ部を備え、前記外周縁と前記内周縁のそれぞれを前記枠体又は前記分銅に固定する固定部と、前記駆動電流の周波数に対して共振周波数を調整するように、前記弾性部材の一部を前記枠体又は前記分銅に固定する調整固定部とを設けたことを特徴とする振動アクチュエータ。 In order to solve such a problem, the present invention has the following configuration.
A frame, a coil fixed to the frame, a magnetic pole portion vibrating in a uniaxial direction by a drive current input to the coil, a weight vibrating integrally with the magnetic pole portion, An elastic member that supports the weight so that it can vibrate in one axis direction, wherein the elastic member has an outer peripheral edge fixed to one of the weight and the frame, and an inner peripheral edge fixed to the other of the weight and the frame. A fixing portion for fixing the outer peripheral edge and the inner peripheral edge to the frame body or the weight, and a connecting portion for connecting the outer peripheral edge and the inner peripheral edge to each other; A vibration actuator, comprising: an adjustment fixing part for fixing a part of the elastic member to the frame or the weight so as to adjust a frequency.

振動アクチュエータの分解斜視図である。It is an exploded perspective view of a vibration actuator. 振動アクチュエータの平面図である。It is a top view of a vibration actuator. 図２におけるＡ−Ａ断面図である。It is AA sectional drawing in FIG. 弾性部材における固定部と調整固定部を示す説明図である。It is explanatory drawing which shows the fixed part and the adjustment fixed part in an elastic member. 振動アクチュエータを備える携帯情報端末（携帯電子機器）を示した説明図である。It is explanatory drawing which showed the portable information terminal (portable electronic device) provided with a vibration actuator.

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。図示のＸ，Ｙ，Ｚはそれぞれ直交する３方向を示している。   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 indicate parts having the same function, and the repeated description in each drawing will be omitted as appropriate. X, Y, and Z shown in the figure represent three orthogonal directions.

図１（分解斜視図），図２（平面図），図３（断面図）に示すように、振動アクチュエータ１は、枠体１０、コイル２、磁極部３、分銅５、弾性部材４を備えている。枠体１０は、コイル２，磁極部３，分銅５，弾性部材４を囲む円筒状のケース１１と、コイル２が固定される円盤状の底板１２を備えている。   As shown in FIG. 1 (exploded perspective view), FIG. 2 (plan view), and FIG. 3 (cross-sectional view), the vibration actuator 1 includes a frame 10, a coil 2, a magnetic pole 3, a weight 5, and an elastic member 4. ing. The frame 10 includes a cylindrical case 11 surrounding the coil 2, the magnetic pole portion 3, the weight 5, and the elastic member 4, and a disk-shaped bottom plate 12 to which the coil 2 is fixed.

コイル２は、コイル固定部材１３を介して底板１２（枠体１０）に固定されている。底板１２は、図示のＸ，Ｙ平面に沿った支持面を備えている。コイル２は、図示のＸ，Ｚ平面に沿って導線が巻き回されて、Ｘ方向に沿って互いに逆向きに電流を流す直線部分を有しており、Ｚ方向に立てた状態で底板１２に固定されている。底板２上には、入力端子１５Ａと接続端子１５Ｂを備える回路基板１５及び緩衝部材１７が設けられている。接続端子１５Ｂにはコイル２の引き出し線が接続される。   The coil 2 is fixed to the bottom plate 12 (frame body 10) via a coil fixing member 13. The bottom plate 12 has a support surface along the illustrated X, Y plane. The coil 2 has a straight portion in which a conducting wire is wound along the X and Z planes shown in the drawing and flows currents in opposite directions along the X direction. Fixed. On the bottom plate 2, a circuit board 15 having an input terminal 15A and a connection terminal 15B and a buffer member 17 are provided. The lead wire of the coil 2 is connected to the connection terminal 15B.

磁極部３は、コイル２のＸ方向に沿った２つの直線部分をそれぞれ挟むように４個の磁石３０を備えており、その磁石３０に対してヨーク３１，３２が配置されている。磁石３０は、コイル２の２つの直線部分を交差する磁束が形成されるように磁極が配置されており、コイル２に駆動電流を入力することで、磁極部３にはＺ方向（一軸方向）の推力が作用する。   The magnetic pole portion 3 includes four magnets 30 so as to sandwich two linear portions of the coil 2 along the X direction, and yokes 31 and 32 are arranged with respect to the magnets 30. The magnet 30 has magnetic poles arranged so that a magnetic flux crossing two linear portions of the coil 2 is formed. When a driving current is input to the coil 2, the magnetic pole portion 3 is moved in the Z direction (uniaxial direction). Thrust acts.

分銅５は、磁極部３と一体に振動するように、磁極部３に固定されている。分銅５には、弾性部材４と接触することで発生する接触音を抑止するための緩衝部材１４がリング状に取り付けられている。分銅５は、弾性部材４を介してケース１１の上面（枠体１０）に一軸方向（図示Ｚ方向）に振動自在に支持されている。   The weight 5 is fixed to the magnetic pole 3 so as to vibrate integrally with the magnetic pole 3. A buffer member 14 is attached to the weight 5 in a ring shape to suppress a contact sound generated when the weight 5 comes into contact with the elastic member 4. The weight 5 is supported on the upper surface (frame body 10) of the case 11 via the elastic member 4 so as to be able to vibrate in a uniaxial direction (Z direction in the drawing).

図示の弾性部材４は、ケース１１の上面（枠体１０）に固定される外周縁４Ａと、分銅５に固定される内周縁４Ｂと、外周縁４Ａと内周縁４Ｂとの間を繋ぐ繋ぎ部４Ｃを備えており、ケース１１（枠体１０）に対して分銅５を図示Ｚ方向（一軸方向）に振動自在に支持している。弾性部材４の内周縁４Ｂには、ケース１１の上面と接触することで発生する接触音を抑止するための緩衝部材１６が取り付けられている。   The illustrated elastic member 4 includes an outer peripheral edge 4A fixed to the upper surface (frame body 10) of the case 11, an inner peripheral edge 4B fixed to the weight 5, and a connecting portion connecting the outer peripheral edge 4A and the inner peripheral edge 4B. 4C, and supports the weight 5 so as to be freely vibrated in the Z direction (uniaxial direction) with respect to the case 11 (frame body 10). A buffer member 16 for suppressing a contact noise generated by contact with the upper surface of the case 11 is attached to the inner peripheral edge 4B of the elastic member 4.

弾性部材４は、円盤状の板バネであり、中心周りに回転対称となるように湾曲線状の繋ぎ部４Ｃが形成されており、図示の例では、３回対称（１２０°対称）となるように繋ぎ部４Ｃが形成されている。なお、図示の例では、弾性部材４の外周縁４Ａをケース１１に固定し、内周縁４Ｂを分銅５に固定しているが、その逆に、外周縁４Ａを分銅５に固定し、内周縁４Ｂをケース１１に固定してもよい。   The elastic member 4 is a disc-shaped leaf spring, and has a curved linear connecting portion 4C formed so as to be rotationally symmetric about the center. In the illustrated example, the elastic member 4 has three-fold symmetry (120 ° symmetry). The connecting portion 4C is formed as described above. In the illustrated example, the outer peripheral edge 4A of the elastic member 4 is fixed to the case 11 and the inner peripheral edge 4B is fixed to the weight 5, but conversely, the outer peripheral edge 4A is fixed to the weight 5 and the inner peripheral edge is fixed. 4B may be fixed to the case 11.

弾性部材４とケース１１又は分銅５とは、溶接によって固定される。ケース１１には、上面に固定用の開口１１Ａが設けられており、この開口１１Ａの周囲に設けられたスポット溶接による固定部Ｓ１で弾性部材４の外周部４Ａとケース１１とが固定されている。   The elastic member 4 and the case 11 or the weight 5 are fixed by welding. An opening 11A for fixing is provided on the upper surface of the case 11, and an outer peripheral portion 4A of the elastic member 4 and the case 11 are fixed by a fixing portion S1 provided around the opening 11A by spot welding. .

このような振動アクチュエータ１は、コイル２に設定周波数の駆動電流を入力することで、分銅５と磁極部３と弾性部材４からなる可動子を図示Ｚ方向（一軸方向）に往復振動させることができる。この際、駆動電流の設定周波数を可動子の振動系の共振周波数に一致させることで、振幅の大きい共振を得ることができる。前述したように、共振周波数は可動子のバネ定数と質量によって決まるので、分銅５の質量、弾性部材４の板厚や繋ぎ部４Ｃの形状などで共振周波数を設定値に合わせているが、部品加工の精度などに微妙なばらつきがあると、実際の共振周波数が設定値からずれることがある。   By inputting a drive current of a set frequency to the coil 2, such a vibration actuator 1 can reciprocally oscillate the movable element including the weight 5, the magnetic pole 3, and the elastic member 4 in the Z direction (uniaxial direction) in the drawing. it can. At this time, resonance having a large amplitude can be obtained by matching the set frequency of the drive current with the resonance frequency of the vibration system of the mover. As described above, since the resonance frequency is determined by the spring constant and the mass of the mover, the resonance frequency is set to the set value by the mass of the weight 5, the thickness of the elastic member 4 and the shape of the connecting portion 4C. If there is a slight variation in the processing accuracy or the like, the actual resonance frequency may deviate from the set value.

これに対して、振動アクチュエータ１は、図４に示すように、ケース１１（枠体１０）が共振周波数調整用の長孔状の開口１１Ｂを備えており、この開口１１Ｂの周囲に弾性部材４の一部（外周部４Ａ）を固定する調整固定部Ｓ２を設けることで、共振周波数の調整を行っている。なお、図示の例では、調整固定部Ｓ２を外周部４Ａにおける固定部Ｓ１とは異なる位置に設けているが、調整固定部Ｓ２を繋ぎ部４Ｃなどに設けても良い。   On the other hand, in the vibration actuator 1, as shown in FIG. 4, the case 11 (the frame body 10) has an elongated hole-shaped opening 11 </ b> B for adjusting the resonance frequency, and the elastic member 4 is provided around the opening 11 </ b> B. The adjustment of the resonance frequency is performed by providing the adjustment fixing portion S2 for fixing a part (the outer peripheral portion 4A) of the resonance frequency. In the illustrated example, the adjustment fixing part S2 is provided at a position different from the fixing part S1 on the outer peripheral part 4A, but the adjustment fixing part S2 may be provided at the connecting part 4C or the like.

弾性部材（板バネ）４のバネ定数ｋ（Ｎ／ｍｍ）は、ｋ＝Ｅ・ｂ・ｔ3／（４・ｌ3）で表すことができる（Ｅ：材料の縦弾性係数Ｎ／ｍｍ2、ｂ：板幅ｍｍ、ｔ：板厚ｍｍ、ｌ：支点から荷重点までの距離（腕長さ））。このため、調整固定部Ｓ２の位置を変えることで、上記の「ｌ」を実質的に変更することが可能になり、これによって、弾性部材４のバネ定数ｋを調整し、共振周波数を調整することができる。 The elastic member a spring constant k (leaf spring) 4 (N / mm) can be expressed by k = E · b · t 3 / (4 · l 3) (E: modulus of longitudinal elasticity of the material N / mm 2 , B: plate width mm, t: plate thickness mm, l: distance from fulcrum to load point (arm length)). For this reason, by changing the position of the adjustment fixing part S2, it is possible to substantially change the above-mentioned “l”, thereby adjusting the spring constant k of the elastic member 4 and adjusting the resonance frequency. be able to.

共振周波数調整用の長孔状の開口１１Ｂは、弾性部材４の形状に対応して設けられており、円筒状のケース１１の外周縁に沿って回転対称（図示の例では３回対称（１２０°対称））に形成されている。そして、開口１１Ｂの周囲に設けられる調整固定部Ｓ２も回転対称に配置することで、弾性部材４の弾性変形のバランスを崩すこと無く、共振周波数の調整を行うことができる。図４に示した例では、ケース１１の中心Ｏと固定部Ｓ１とを結ぶ線と中心Ｏと調整固定部Ｓ２とを結ぶ線とのなす角θを大きくすることで、共振周波数を上昇させることが可能になる。   The long hole-shaped opening 11B for adjusting the resonance frequency is provided corresponding to the shape of the elastic member 4, and is rotationally symmetrical along the outer peripheral edge of the cylindrical case 11 (three-fold symmetry (120 in the illustrated example). ° symmetry)). The resonance frequency can be adjusted without disturbing the balance of the elastic deformation of the elastic member 4 by arranging the adjustment fixing portion S2 provided around the opening 11B in a rotationally symmetric manner. In the example shown in FIG. 4, the resonance frequency is increased by increasing the angle θ between the line connecting the center O of the case 11 and the fixed part S1 and the line connecting the center O and the adjustment fixed part S2. Becomes possible.

図５は、振動アクチュエータ１を装備した携帯電子機器の一例として、携帯情報端末１００を示している。振動アクチュエータ１を備える携帯情報端末１００は、振動アクチュエータ１が共振振動することによって、入力電流に対して効率的に大振幅の振動を得ることができるので、電力消費を抑えることが可能になり、バッテリ容量を小さくすることで、小型・軽量化が可能になる。   FIG. 5 shows a portable information terminal 100 as an example of a portable electronic device equipped with the vibration actuator 1. The portable information terminal 100 including the vibration actuator 1 can efficiently obtain a large-amplitude vibration with respect to an input current due to the resonance vibration of the vibration actuator 1, so that power consumption can be suppressed. By reducing the battery capacity, the size and weight can be reduced.

以上、本発明の実施の形態について図面を参照して詳述してきたが、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 described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to these embodiments, and a design change or the like may be made without departing from the gist of the present invention. The present invention is also included in the present invention. In addition, the above embodiments can be combined with each other by diverting the technologies unless there is a particular contradiction or problem in the purpose, configuration, or the like.

１：振動アクチュエータ，
２：コイル，
３：磁極部，３０：磁石，３１，３２：ヨーク，
４：弾性部材（板バネ），４Ａ：外周縁，４Ｂ：内周縁，４Ｃ：繋ぎ部，
５：分銅，
１０：枠体，１１：ケース，１１Ａ，１１Ｂ：開口，１２：底板，
１３：コイル固定部材，１４：緩衝部材，
１５：回路基板，１５Ａ：入力端子，１５Ｂ：接続端子，
１６，１７：緩衝部材，１００：携帯情報端末（携帯電子機器），
Ｓ１：固定部，Ｓ２：調整固定部 1: Vibration actuator,
2: coil,
3: magnetic pole part, 30: magnet, 31, 32: yoke,
4: elastic member (leaf spring), 4A: outer peripheral edge, 4B: inner peripheral edge, 4C: connecting portion,
5: Weight,
10: frame, 11: case, 11A, 11B: opening, 12: bottom plate,
13: coil fixing member, 14: cushioning member,
15: circuit board, 15A: input terminal, 15B: connection terminal,
16, 17: cushioning member, 100: portable information terminal (portable electronic device),
S1: fixed part, S2: adjustment fixed part

Claims (5)

枠体と、
前記枠体に固定されたコイルと、
前記コイルに入力される駆動電流によって一軸方向に振動する磁極部と、
前記磁極部と一体に振動する分銅と、
前記枠体に対して前記分銅を一軸方向に振動自在に支持する弾性部材とを備え、
前記弾性部材は、前記分銅と前記枠体の一方に固定される外周縁と前記分銅と前記枠体の他方に固定される内周縁と、前記外周縁と前記内周縁の間を繋ぐ繋ぎ部を備え、
前記外周縁と前記内周縁のそれぞれを前記枠体又は前記分銅に固定する固定部と、
前記駆動電流の周波数に対して共振周波数を調整するように、前記弾性部材の一部を前記枠体又は前記分銅に固定する調整固定部とを設けたことを特徴とする振動アクチュエータ。 A frame,
A coil fixed to the frame,
A magnetic pole portion that vibrates in a uniaxial direction by a drive current input to the coil,
A weight that vibrates integrally with the magnetic pole portion,
An elastic member that supports the weight so as to be able to vibrate in the uniaxial direction with respect to the frame,
The elastic member includes an outer peripheral edge fixed to one of the weight and the frame, an inner peripheral edge fixed to the other of the weight and the frame, and a connecting portion connecting the outer peripheral edge and the inner peripheral edge. Prepare,
A fixing portion for fixing each of the outer peripheral edge and the inner peripheral edge to the frame or the weight,
A vibration actuator, comprising: an adjustment fixing part for fixing a part of the elastic member to the frame or the weight so as to adjust a resonance frequency with respect to a frequency of the driving current. 前記固定部は、前記外周縁が前記枠体に固定され、前記調整固定部は、前記固定部とは異なる位置で、前記外周縁又は前記繋ぎ部の一部を前記枠体に固定することを特徴とする請求項１記載の振動アクチュエータ。   The fixing portion is configured such that the outer peripheral edge is fixed to the frame, and the adjustment fixing portion fixes a part of the outer peripheral edge or the connecting portion to the frame at a position different from the fixing portion. The vibration actuator according to claim 1, wherein: 前記枠体は、前記調整固定部を設けるための長孔状の開口を外周縁に沿って備えることを特徴とする請求項２記載の振動アクチュエータ。   3. The vibration actuator according to claim 2, wherein the frame body includes an elongated hole along the outer peripheral edge for providing the adjustment fixing portion. 4. 前記枠体は、円筒形であり、前記調整固定部は、円筒形の中心周りに回転対称に配置されていることを特徴とする請求項１〜３のいずれか１項に記載の振動アクチュエータ。   The vibration actuator according to any one of claims 1 to 3, wherein the frame body is cylindrical, and the adjusting and fixing portion is arranged rotationally symmetrically around a center of the cylindrical shape. 請求項１〜４のいずれか１項に記載の振動アクチュエータを備えた携帯電子機器。   A portable electronic device comprising the vibration actuator according to claim 1.
JP2018116091A 2018-06-19 2018-06-19 Vibration actuator Pending JP2019221046A (en)

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