JP2010206906A

JP2010206906A - Vibration motor and lens driver thereof

Info

Publication number: JP2010206906A
Application number: JP2009048669A
Authority: JP
Inventors: Naoto Shiga; 直人志賀
Original assignee: Tamron Co Ltd
Current assignee: Tamron Co Ltd
Priority date: 2009-03-02
Filing date: 2009-03-02
Publication date: 2010-09-16
Anticipated expiration: 2029-03-02
Also published as: JP5397988B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drive mechanism which reduces its installation space and prevents vibrations in a drive source and the influence of heat generation, so as to cope with miniaturization and higher performance, as a drive mechanism for a movable member. <P>SOLUTION: A vibration motor brings a vibrator into pressure contact with a drive transmitting member and vibrates the vibrator by biasing the vibrator in a direction of the drive transmitting member by means of a pressurizing mechanism, and operates the drive transmitting member by vibrating the vibrator and transmitting the vibration to the drive transmitting member in pressure contact with the vibrator. The motor includes the vibrator, a base member on the vibrator side, which holds the vibrator, and a foundation member, to which the base member on the vibrator side is attached. The motor adopts the vibration motor, in which the vibrator is fixed apart from the foundation member while the base member on the vibrator side is attached to the foundation member, and a lens driver, which shifts a lens by using the motor. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本件発明は、振動モータに関し、特に、小型のレンズ駆動装置に好適に用いることができる振動モータに関する。 The present invention relates to a vibration motor, and more particularly to a vibration motor that can be suitably used for a small lens driving device.

光学機器及び家電機器等、可動部分を備える各種装置の駆動源としてモータが用いられている。そして、光学機器及び家電機器等における高機能化、小型化に伴い、駆動機構においても小型化や高出力化が求められている。このようなニーズに対し、ＤＣギヤードモータを使用する場合、小型モータを使用し、この小型モータと複数段の減速機とを連結することで、大型モータのようなトルクを出す構成としていた。例えば、特許文献１には、正逆駆動モータの回転力を駆動対象へ伝達するモータ減速機構に関し、複数のギヤを回転自在に支持させ、交互に回転が伝達されるように噛み合わせたギヤにより、回転中心軸方向へギヤを連ねて減速比を稼ぎ、配設スペースのコンパクト化を図る技術が開示されている。しかし、このような減速機構を備える駆動装置では、複数の減速機を用いるためにバックラッシュがあり、停止精度が悪く、更に、減速機の稼働音が大きく生じるという課題があった。 A motor is used as a drive source for various devices including movable parts such as optical devices and home appliances. And along with higher functionality and downsizing in optical equipment, home appliances, etc., downsizing and higher output are also required in drive mechanisms. In response to such needs, when a DC geared motor is used, a small motor is used, and the small motor and a plurality of speed reducers are connected to generate torque like a large motor. For example, Patent Document 1 relates to a motor speed reduction mechanism that transmits the rotational force of a forward / reverse drive motor to a drive target, and a plurality of gears are rotatably supported by gears meshed so that rotation is transmitted alternately. A technique is disclosed in which gears are linked in the direction of the central axis of rotation to increase the reduction ratio and to reduce the installation space. However, the drive device provided with such a speed reduction mechanism has a problem that backlash occurs because a plurality of speed reducers are used, the stop accuracy is poor, and the operating noise of the speed reducer is increased.

そこで、特許文献２、特許文献３のように、超音波モータ等の振動モータを使用した駆動装置が提案されている。振動モータは、所定の振動を生じさせる振動子と、当該振動子に摩擦接触させる被駆動部材とを備え、振動子の運動を被駆動部材に伝達させて、駆動機構の運動に変換させるものである。 Therefore, as in Patent Document 2 and Patent Document 3, a drive device using a vibration motor such as an ultrasonic motor has been proposed. The vibration motor includes a vibrator that generates a predetermined vibration and a driven member that is brought into frictional contact with the vibrator, and transmits the movement of the vibrator to the driven member and converts it into the movement of the driving mechanism. is there.

特許文献２には、屈曲性定在波振動と縦振動との合成により楕円振動を励起させる振動子が振動子ホルダに保持された振動子ユニットが用いられ、振動子の運動が、被駆動体（移動体，回転部材）であるロータ側に伝達されて、ロータが回転駆動する超音波モータが開示されている。 Patent Document 2 uses a vibrator unit in which a vibrator that excites elliptical vibration by combining flexural standing wave vibration and longitudinal vibration is held in a vibrator holder, and the motion of the vibrator is driven by a driven body. An ultrasonic motor that is transmitted to the rotor side (moving body, rotating member) and is driven to rotate is disclosed.

また、特許文献３には、振動モータをレンズ鏡筒における合焦動作の駆動源として用いる光学系駆動装置が開示されている。特許文献３に開示の振動モータは、出力軸の外周面のベース部材に回動自在に支持される出力軸を備え、駆動力取出部を有する振動子と、当該振動子の駆動力取出部を出力軸の外周面に加圧接触させる加圧部材とがベース部材に搭載され、加圧部材によって振動子が出力軸側に圧接され、振動モータの駆動力を出力軸側に伝達させる構成が採用されている。 Patent Document 3 discloses an optical system driving apparatus that uses a vibration motor as a driving source for focusing operation in a lens barrel. A vibration motor disclosed in Patent Document 3 includes an output shaft that is rotatably supported by a base member on an outer peripheral surface of an output shaft, and includes a vibrator having a driving force extraction portion and a driving force extraction portion of the vibrator. A configuration is adopted in which a pressure member that makes pressure contact with the outer peripheral surface of the output shaft is mounted on the base member, the vibrator is pressed against the output shaft side by the pressure member, and the driving force of the vibration motor is transmitted to the output shaft side. Has been.

特開２００２−１６８３０８号公報JP 2002-168308 A 特開２００６−１５８０５４号公報JP 2006-158054 A 特許４１８２５８８号公報Japanese Patent No. 4182588

振動モータは、駆動時に、振動モータの振動が当該振動モータの設置部周辺に伝わり、部品のがたつき等が生じやすい。更に、駆動時に熱が発生し、周辺機構の動作に影響を与える点が課題となっていた。例えば、特許文献２の超音波モータでは、振動子ユニットが、ハウジングに接着固定されており、特許文献３の振動モータでは、振動子を平板状のベース部材に取り付けている。このため、超音波モータの振動や熱が周辺機構に直接伝わりやすく、当該周辺機構の動作や、耐久性に影響を与える点が課題となっていた。例えば、特許文献３に開示のように、超音波モータを、カメラレンズの鏡筒におけるレンズの合焦動作に適用した場合、超音波モータの発熱及び振動がベース部材を介して鏡筒側に伝わり、レンズの停止精度の悪化が生じる。 When the vibration motor is driven, the vibration of the vibration motor is transmitted to the vicinity of the installation portion of the vibration motor, and the parts are likely to rattle. Furthermore, heat is generated during driving, which affects the operation of the peripheral mechanism. For example, in the ultrasonic motor of Patent Document 2, the vibrator unit is bonded and fixed to the housing, and in the vibration motor of Patent Document 3, the vibrator is attached to a flat base member. For this reason, the vibration and heat of the ultrasonic motor are easily transmitted directly to the peripheral mechanism, and the operation and durability of the peripheral mechanism are affected. For example, as disclosed in Patent Document 3, when an ultrasonic motor is applied to a lens focusing operation in a lens barrel of a camera lens, heat and vibration of the ultrasonic motor are transmitted to the lens barrel side via a base member. The lens stop accuracy deteriorates.

そこで、本件発明は、可動性部材の駆動機構として、小型化や高性能化に対応すべく、設置スペースのコンパクト化と、駆動源における振動及び発熱の影響を防止した駆動機構を提供することを目的とする。 Therefore, the present invention provides a drive mechanism for a movable member that is compact in installation space and prevents the influence of vibration and heat generation in the drive source in order to cope with downsizing and high performance. Objective.

本発明者等は、鋭意研究を行った結果、以下の振動モータを採用することで上記課題を達成するに到った。 As a result of intensive studies, the present inventors have achieved the above-mentioned problem by employing the following vibration motor.

本件発明に係る振動モータ：本件発明に係る振動モータは、与圧機構によって振動子を駆動伝達部材方向に付勢することにより、振動子を駆動伝達部材に圧接させ、振動子を振動させ、当該振動子に圧接された駆動伝達部材に振動子の振動を伝達することによって、駆動伝達部材を作動させる振動モータであって、振動子と、当該振動子を保持する振動子側ベース部材と、当該振動子側ベース部材が取り付けられる基礎部材とを備え、前記振動子側ベース部材を基礎部材に取り付けた状態で、振動子が基礎部材と離間するようにして固定したことを特徴とする。 The vibration motor according to the present invention: The vibration motor according to the present invention causes the vibrator to be pressed against the drive transmission member by urging the vibrator in the direction of the drive transmission member by the pressurizing mechanism, thereby vibrating the vibrator. A vibration motor that operates a drive transmission member by transmitting vibrations of a vibrator to a drive transmission member that is in pressure contact with the vibrator, the vibrator, a vibrator-side base member that holds the vibrator, And a base member to which the vibrator-side base member is attached. The vibrator is fixed so as to be separated from the base member in a state where the vibrator-side base member is attached to the base member.

本件発明に係る振動モータは、前記振動子を保持する振動子ホルダを有し、前記振動子側ベース部材は、当該振動子ホルダを保持するものであると、より好ましい。 More preferably, the vibration motor according to the present invention includes a vibrator holder that holds the vibrator, and the vibrator-side base member holds the vibrator holder.

本件発明に係る振動モータは、前記振動子側ベース部材は、アルミニウム、アルミニウム合金、チタン、チタン合金、ゲルマニウム、ゲルマニウム合金、鉄系合金、銅合金のいずれかを用いたものであることがより好ましい。 In the vibration motor according to the present invention, it is more preferable that the vibrator-side base member uses one of aluminum, aluminum alloy, titanium, titanium alloy, germanium, germanium alloy, iron-based alloy, and copper alloy. .

本件発明に係る振動モータは、前記基礎部材には、振動子側ベース部材を取り付けるための取付支柱を備え、当該取付支柱を介して、基礎部材と振動子側ベース部材とが結合されたものがより好ましい。 In the vibration motor according to the present invention, the foundation member includes an attachment column for attaching the vibrator side base member, and the foundation member and the vibrator side base member are coupled via the attachment column. More preferred.

本件発明に係る振動モータは、前記振動子側ベース部材には、前記振動子ホルダが配置される部分に切欠部が形成されたものがより好ましい。 In the vibration motor according to the present invention, it is more preferable that the vibrator-side base member has a notch in a portion where the vibrator holder is disposed.

本件発明に係る振動モータは、前記与圧機構が、前記振動子側ベース部材の、振動子ホルダが設けられた第一面と同じ面に設けられ、当該与圧機構は弾性材を備え、当該与圧機構は、前記弾性材により、振動子を駆動伝達部材方向に付勢可能に、前記振動子側ベース部材の第一面側に取り付けられたものがより好ましい。 In the vibration motor according to the present invention, the pressurizing mechanism is provided on the same surface as the first surface of the vibrator-side base member on which the vibrator holder is provided, the pressurizing mechanism includes an elastic material, More preferably, the pressurizing mechanism is attached to the first surface side of the vibrator-side base member so as to be able to bias the vibrator toward the drive transmission member by the elastic material.

もしくは、本件発明に係る振動モータは、当該与圧機構は、前記振動子側ベース部材の、振動子ホルダが設けられた第一面とは異なる第二面に設けられたものもより好ましい。 Alternatively, in the vibration motor according to the present invention, it is more preferable that the pressurizing mechanism is provided on a second surface different from the first surface of the vibrator-side base member on which the vibrator holder is provided.

本件発明に係る振動モータは、前記第二面には、前記振動子が前記駆動伝達部材に押圧される方向と略平行となる方向に伸縮する弾性材からなる与圧機構が設けられ、前記振動子側ベース部材の厚さ方向に噛合し、且つ、前記振動子が前記駆動伝達部材に押圧される方向に摺動可能な与圧ガイドを備え、当該与圧ガイドを介して、弾性材の付勢力を前記振動子を駆動伝達部材方向に伝達させて、振動子を駆動伝達部材に圧接させるものがより好ましい。 In the vibration motor according to the present invention, the second surface is provided with a pressurizing mechanism made of an elastic material that expands and contracts in a direction substantially parallel to a direction in which the vibrator is pressed against the drive transmission member. A pressure guide that meshes in the thickness direction of the child-side base member and is slidable in a direction in which the vibrator is pressed against the drive transmission member, and the elastic material is attached via the pressure guide. More preferably, the vibrator is transmitted in the direction of the drive transmission member and the vibrator is pressed against the drive transmission member.

本件発明に係るレンズ駆動装置：本件発明に係るレンズ駆動装置は、レンズを光軸方向に直線移動させるレンズ駆動装置であって、上述の振動モータでレンズを移動させることを特徴とする。 Lens driving device according to the present invention: The lens driving device according to the present invention is a lens driving device that linearly moves the lens in the optical axis direction, and is characterized in that the lens is moved by the vibration motor described above.

本件発明に係る振動モータは、コンパクト化を図りながら、振動モータ特有の振動が当該振動モータの設置部周辺に伝わることを防ぐことができる。その結果、振動モータの停止精度を向上させることができ、且つ、振動によるがたつきに起因する不具合を防止することができる。また、モータの駆動音を抑えることができる。更に、振動モータの稼働に伴って生じる熱が駆動機構に伝わることを防ぐことができる。その結果、近年の光学機器や家電機器には欠かせない電子部品への熱の影響を防止することができる。 The vibration motor according to the present invention can prevent the vibration unique to the vibration motor from being transmitted to the vicinity of the installation portion of the vibration motor while achieving compactness. As a result, it is possible to improve the stopping accuracy of the vibration motor and to prevent problems caused by rattling due to vibration. In addition, the driving sound of the motor can be suppressed. Further, it is possible to prevent heat generated with the operation of the vibration motor from being transmitted to the drive mechanism. As a result, it is possible to prevent the influence of heat on electronic components that are indispensable for recent optical devices and home appliances.

そして、本件発明に係るレンズ駆動装置は、上述の振動モータを用いてレンズを駆動させるので、省スペース化を図ることができる。更に、フォーカシングやズーミング時の、レンズ鏡筒の静音化や低震化を図ることができる。 And since the lens drive device concerning this invention drives a lens using the above-mentioned vibration motor, it can attain space saving. In addition, the lens barrel can be made quieter and less seismic during focusing and zooming.

本件発明に係る振動モータの第１実施形態の斜視図である。1 is a perspective view of a first embodiment of a vibration motor according to the present invention. 本件発明に係る振動モータの第１実施形態の分解斜視図である。It is a disassembled perspective view of 1st Embodiment of the vibration motor which concerns on this invention. 本件発明に係る振動モータの第１実施形態の分解斜視図である。It is a disassembled perspective view of 1st Embodiment of the vibration motor which concerns on this invention. 本件発明に係る振動モータの第１実施形態における振動子側ベース部材に振動子を取り付けた状態を示す平面図である。It is a top view which shows the state which attached the vibrator | oscillator to the vibrator | oscillator side base member in 1st Embodiment of the vibration motor which concerns on this invention. 本件発明に係る振動モータの第１実施形態における振動子側ベース部材を示す平面図である。It is a top view which shows the vibrator side base member in 1st Embodiment of the vibration motor which concerns on this invention. 本件発明に係る振動モータの第１実施形態における振動子側ベース部材に与圧機構を取り付けた状態を示す平面図である。It is a top view which shows the state which attached the pressurization mechanism to the vibrator side base member in 1st Embodiment of the vibration motor which concerns on this invention. 第２実施形態の振動モータの振動子側ベース部材への振動子ホルダ等を取り付けた状態を示す平面図である。It is a top view which shows the state which attached the vibrator holder etc. to the vibrator side base member of the vibration motor of 2nd Embodiment. 本件発明に係る振動モータの第２実施形態における振動子側ベース部材を示す平面図である。It is a top view which shows the vibrator side base member in 2nd Embodiment of the vibration motor which concerns on this invention.

以下、本発明に係る振動モータの実施の形態を説明する。本件発明に係る振動モータは、与圧機構によって振動子を駆動伝達部材方向に付勢することにより、振動子を駆動伝達部材に圧接させ、振動子を振動させ、当該振動子に圧接された駆動伝達部材に振動子の振動を伝達することによって、駆動伝達部材を作動させる振動モータであって、振動子と、振動子側ベース部材と、基礎部材とを備えるものである。そして、振動子を固定する振動子側ベース部材を基礎部材に取り付けた状態で、振動子が基礎部材と離間するようにして固定したことを特徴とする。 Embodiments of a vibration motor according to the present invention will be described below. In the vibration motor according to the present invention, the vibrator is pressed against the drive transmission member by urging the vibrator in the direction of the drive transmission member by the pressurizing mechanism, the vibrator is vibrated, and the drive pressed against the vibrator A vibration motor that operates a drive transmission member by transmitting vibrations of a vibrator to a transmission member, and includes a vibrator, a vibrator-side base member, and a base member. The vibrator is fixed so that the vibrator is separated from the base member in a state where the vibrator side base member for fixing the vibrator is attached to the base member.

以下、第１実施形態ならびに第２実施形態を示しながら説明する。図１〜図６は本件発明に係る振動モータの第１実施形態を示す図であり、図７及び図８は、本件発明に係る振動モータの第２実施形態を示す図である。 Hereinafter, description will be given while showing the first embodiment and the second embodiment. 1-6 is a figure which shows 1st Embodiment of the vibration motor which concerns on this invention, FIG.7 and FIG.8 is a figure which shows 2nd Embodiment of the vibration motor which concerns on this invention.

第１実施形態：第１実施形態おける振動モータ１は、図２及び図３に示すように、振動子２と、当該振動子を所定の方向に振動可能に保持する振動子ホルダ３とを備える。本実施の形態では、振動子２は圧電素子からなり、扁平な略直方体の形状のものを用いた。そして、振動子ホルダ３は、振動子２を収容する溝状の収容部が形成された枠体であり、振動子２が伸縮可能であり、且つ、所望の方向に振動可能となるような状態で保持するものである。この他、振動子ホルダ３には、振動子２を振動させるための電圧印加機構が振動子２と接続可能に設けられ、また、振動子の振動状態を検出する振動検出機構、電極等（不図示）が設けられる。圧電素子を用いた振動モータの場合、振動子の形状、振動子に電圧を印加する場所、印加する電圧の量や周期等によって、所望の振動動作となるように制御する。 First Embodiment: As shown in FIGS. 2 and 3, the vibration motor 1 according to the first embodiment includes a vibrator 2 and a vibrator holder 3 that holds the vibrator so as to vibrate in a predetermined direction. . In the present embodiment, the vibrator 2 is made of a piezoelectric element and has a flat, substantially rectangular parallelepiped shape. The vibrator holder 3 is a frame in which a groove-like housing portion for housing the vibrator 2 is formed, and the vibrator 2 can be expanded and contracted and can vibrate in a desired direction. It is what you hold. In addition, the vibrator holder 3 is provided with a voltage application mechanism for oscillating the vibrator 2 so as to be connectable to the vibrator 2, a vibration detection mechanism for detecting the vibration state of the vibrator, electrodes, etc. Is provided). In the case of a vibration motor using a piezoelectric element, control is performed so as to achieve a desired vibration operation according to the shape of the vibrator, the place where a voltage is applied to the vibrator, the amount and period of the applied voltage, and the like.

本実施の形態では、電圧が印加されると振動子２が伸縮する。そして、後述する与圧ガイド９を介して、与圧機構により、図４に矢印Ａで示す方向に、振動子２が付勢される。その結果、振動子２は、与圧機構により図４に示す矢印Ｂ方向に押されながら電圧印加により伸縮する。そして、振動子２は、その突起部２１において駆動伝達部材５と当接する。振動子２には、当該突起部２１において所望の運動が発生するような振動が生じるように印加電圧が制御される。 In the present embodiment, when a voltage is applied, the vibrator 2 expands and contracts. Then, the vibrator 2 is biased in the direction indicated by the arrow A in FIG. 4 by the pressurizing mechanism through the pressurizing guide 9 described later. As a result, the vibrator 2 expands and contracts by applying a voltage while being pushed in the direction of arrow B shown in FIG. The vibrator 2 comes into contact with the drive transmission member 5 at the projection 21. In the vibrator 2, the applied voltage is controlled so that vibration that causes a desired motion to occur in the protrusion 21 occurs.

駆動伝達部材５は、振動子２からの振動を受けて、所定方向の運動を伝達する。例えば、図３に示すように、駆動伝達部材５には、回転軸５２に駆動リング５１を設け、振動子２の制御された振動が駆動リング５１側に伝達され、振動子２と駆動リング５１との摩擦力により、回転軸５２の回転方向への相対運動を発生させる。第１実施形態の振動モータでは、駆動リング５１に圧接される振動子２の突起部２１が、当該駆動リング５１との接触面において楕円を描くような回転振動を発生させる。この突起部２１における振動の速度や楕円状に回転する振動方向により、駆動リング５１の回転方向や速度を調節する。 The drive transmission member 5 receives vibration from the vibrator 2 and transmits motion in a predetermined direction. For example, as shown in FIG. 3, the drive transmission member 5 is provided with a drive ring 51 on the rotating shaft 52, and the controlled vibration of the vibrator 2 is transmitted to the drive ring 51 side. The relative movement of the rotary shaft 52 in the rotational direction is generated by the frictional force. In the vibration motor of the first embodiment, the protrusion 21 of the vibrator 2 that is in pressure contact with the drive ring 51 generates rotational vibration that draws an ellipse on the contact surface with the drive ring 51. The rotation direction and speed of the drive ring 51 are adjusted by the vibration speed and the vibration direction rotating in an elliptical shape in the protrusion 21.

次に、与圧機構８について説明する。振動モータでは、駆動伝達部材４に振動子２の振動を駆動力として伝達させるために、振動子２を駆動伝達部材４に圧接させる。そこで、与圧機構８は、振動子２の突起部２１を駆動伝達部材５方向に付勢することにより、振動子２を駆動伝達部材５に圧接させるために設ける。与圧機構８は、弾性材の弾性力を用いる方法や、空圧等の圧力機構を用いて振動子側に圧力を伝え、振動子２を駆動伝達部材５方向に付勢する例が挙げられる。そして、与圧機構に弾性材を用いる構成とすると、より計量且つ簡便な構成の与圧機構とすることができる。なお、弾性材としては、バネ等が挙げられる。 Next, the pressurizing mechanism 8 will be described. In the vibration motor, the vibrator 2 is brought into pressure contact with the drive transmission member 4 in order to transmit the vibration of the vibrator 2 as a driving force to the drive transmission member 4. Therefore, the pressurizing mechanism 8 is provided to press the protrusion 21 of the vibrator 2 toward the drive transmission member 5 to press the vibrator 2 against the drive transmission member 5. Examples of the pressurizing mechanism 8 include a method of using the elastic force of an elastic material and a pressure mechanism such as pneumatic pressure that transmits pressure to the vibrator side and biases the vibrator 2 toward the drive transmission member 5. . And if it is set as the structure which uses an elastic material for a pressurization mechanism, it can be set as the pressurization mechanism of a more measurement and simple structure. In addition, a spring etc. are mentioned as an elastic material.

図６に示すように、第一実施形態に示す与圧機構８は、振動子２が付勢される方向と略平行となる方向（図４に示す矢印Ｂ方向）に伸縮する弾性材８１を備える。本実施の形態では、弾性材８１として、２本のバネを並列配置した。そして、図４に示すように、当該弾性材８１の付勢力を、振動子２を駆動伝達部材方向に押圧する力として伝達させて、当該振動子２を駆動伝達部材に圧接させる。第一実施形態の与圧機構８は、振動子側ベース部材６の第二面６ｂに取り付けられる。 As shown in FIG. 6, the pressurizing mechanism 8 shown in the first embodiment includes an elastic material 81 that expands and contracts in a direction (arrow B direction shown in FIG. 4) that is substantially parallel to the direction in which the vibrator 2 is urged. Prepare. In the present embodiment, two springs are arranged in parallel as the elastic member 81. Then, as shown in FIG. 4, the urging force of the elastic member 81 is transmitted as a force that presses the vibrator 2 in the direction of the drive transmission member, and the vibrator 2 is pressed against the drive transmission member. The pressurizing mechanism 8 of the first embodiment is attached to the second surface 6 b of the vibrator side base member 6.

振動子側ベース部材６は、振動子ホルダ３を保持するための平板状のベース部材である。振動子側ベース部材６には、この他にも与圧機構８、与圧ガイド９を取り付ける。第１実施形態における振動子側ベース部材６の平面図を図５に示す。図５に示すように、振動子側ベース部材６は、振動子ホルダ３をビス止めして固定するための振動子ホルダ取付部６１と、駆動伝達部材５を保持するための駆動伝達部材配置孔６２とを備え、それぞれに、振動子ホルダ３ならびに駆動伝達部材５を配置して保持する。 The vibrator side base member 6 is a flat base member for holding the vibrator holder 3. In addition to this, a pressurizing mechanism 8 and a pressurizing guide 9 are attached to the vibrator side base member 6. FIG. 5 shows a plan view of the vibrator side base member 6 in the first embodiment. As shown in FIG. 5, the vibrator side base member 6 includes a vibrator holder mounting portion 61 for fixing the vibrator holder 3 by screwing, and a drive transmission member arrangement hole for holding the drive transmission member 5. 62, and the vibrator holder 3 and the drive transmission member 5 are arranged and held in each.

さらに、振動子側ベース部材６には、振動子ホルダ３が配置される部分に切欠部６３が形成されている。この切欠部６３は、振動子２の振動時に生じる熱が振動子側ベース部材６に伝わるのを防ぐとともに、振動を抑制するために形成されるものである。すなわち、振動子２は作動時に振動と熱が生じるが、この振動は、構成部品のがたつきや精密動作に影響を与える。さらに、発生する振動音に関して、商品価値を高める上での静音化が求められている。また、作動時に生じる熱は、振動子の制御回路の他、光学機器、家電機器には欠かせないものとなっている電子部品の不具合の要因となりやすいため、振動モータの駆動時に生じた熱の蓄熱を防ぐ必要がある。そのために、振動子側ベース部材６において、振動子ホルダ３と近接する位置に切欠部６３を形成して、蓄熱と振動伝達を防ぐ構成とした。 Further, the vibrator-side base member 6 is formed with a notch 63 at a portion where the vibrator holder 3 is disposed. The notch 63 is formed to prevent heat generated during vibration of the vibrator 2 from being transmitted to the vibrator-side base member 6 and to suppress vibration. That is, the vibrator 2 generates vibration and heat during operation, but this vibration affects the shakiness and precision operation of the component parts. Furthermore, regarding the generated vibration noise, there is a demand for noise reduction in order to increase the commercial value. In addition to the control circuit of the vibrator, the heat generated during operation is likely to cause malfunctions in electronic components that are indispensable for optical equipment and household electrical appliances. It is necessary to prevent heat storage. Therefore, in the vibrator side base member 6, a notch 63 is formed at a position close to the vibrator holder 3 to prevent heat storage and vibration transmission.

また、第１実施形態では、振動子側ベース部材６の第二面側６ｂの当該切欠部６３の位置に、与圧機構８に備える弾性材８１であるバネを配置した。これにより、弾性材８１の配置箇所の省スペース化を図ることができ、振動モータの小型化を図ることができる。 In the first embodiment, the spring, which is the elastic member 81 provided in the pressurizing mechanism 8, is disposed at the position of the notch 63 on the second surface side 6 b of the vibrator side base member 6. Thereby, space saving of the arrangement | positioning location of the elastic material 81 can be achieved, and size reduction of a vibration motor can be achieved.

また、振動子側ベース部材６には、与圧機構８が取り付けられる。図５に示すように、振動子側ベース部材６は、与圧機構８をビス止めして固定するための与圧機構取付孔６４を備える。この与圧機構取付孔６４に、与圧機構８の基部８２が固定される。 A pressurizing mechanism 8 is attached to the vibrator side base member 6. As shown in FIG. 5, the vibrator-side base member 6 includes a pressurizing mechanism mounting hole 64 for fixing the pressurizing mechanism 8 with screws. The base 82 of the pressurizing mechanism 8 is fixed to the pressurizing mechanism mounting hole 64.

さらに、与圧機構８の弾性材による付勢力を振動子２に伝える与圧ガイド９を取り付けるための与圧ガイド取付部６５が形成される。 Further, a pressurizing guide attaching portion 65 for attaching the pressurizing guide 9 that transmits the urging force of the elastic member of the pressurizing mechanism 8 to the vibrator 2 is formed.

ここで、与圧ガイド９について説明する。与圧機構の弾性材と弾性力を振動子側に伝達させる方法として、与圧ガイドを用い、当該与圧ガイドを介して伝達して、振動子を押圧させることが好ましい。この与圧ガイドは、与圧機構と連結され、且つ、振動子と当接する構成とし、当該与圧ガイドを介して、弾性材の付勢力を前記振動子を駆動伝達部材方向に伝達させて当該振動子を駆動伝達部材に圧接させる。 Here, the pressurizing guide 9 will be described. As a method for transmitting the elastic material and elastic force of the pressurizing mechanism to the vibrator side, it is preferable to use a prestressing guide and transmit it through the prestressing guide to press the vibrator. The pressurizing guide is connected to the pressurizing mechanism and abuts on the vibrator, and the biasing force of the elastic material is transmitted to the vibrator in the direction of the drive transmission member via the pressurizing guide. The vibrator is brought into pressure contact with the drive transmission member.

第１実施形態における与圧ガイド９は、図３、図４及び図６に示すように、与圧機構８に直接連結される第一与圧ガイド部材９１と、当該第一与圧ガイド部材９１と振動子２との間において、それぞれに当接するように配置された第二与圧ガイド部材９２とで構成されるものである。第一与圧ガイド部材９１には、与圧機構８の付勢方向（図６に示す矢印Ｂ方向）と直交する方向に伸びる押圧部９１ａを備える。そして、第一与圧ガイド部材９１に、与圧機構連結部９１ｂ，９１ｂを設け、当該与圧機構連結部９１ｂ，９１ｂに弾性材８１の端部８３，８３を係止させる。次に、当該与圧機構連結部９１ｂ，９１ｂをベース部材６の第二面６ｂに当接させた状態で、第一与圧ガイド部材９１をベース部材６に取り付けることにより、与圧機構８と与圧ガイド９とを連結させる。 The pressurization guide 9 in the first embodiment includes a first pressurization guide member 91 that is directly connected to the pressurization mechanism 8 and the first pressurization guide member 91, as shown in FIGS. And the second pressure guide member 92 disposed so as to be in contact with each other. The first pressurizing guide member 91 includes a pressing portion 91a extending in a direction orthogonal to the urging direction of the pressurizing mechanism 8 (arrow B direction shown in FIG. 6). And the pressurization mechanism connection part 91b, 91b is provided in the 1st pressurization guide member 91, and the edge parts 83 and 83 of the elastic material 81 are latched by the said pressurization mechanism connection part 91b, 91b. Next, the first pressurizing guide member 91 is attached to the base member 6 in a state where the pressurizing mechanism connecting portions 91b, 91b are in contact with the second surface 6b of the base member 6, thereby The pressurizing guide 9 is connected.

一方、第二与圧ガイド部材９２には、第一与圧ガイド部材９１との当接面に、第一与圧ガイド部材９１の押圧部９１ａを配置する溝部９２ａが形成されている。第二与圧ガイド部材９２は、溝部９２ａに第一与圧ガイド部材９１の押圧部９１ａを配置した状態で、第一与圧ガイド部材９１と振動子２との間に配置される。 On the other hand, the second pressurizing guide member 92 is formed with a groove portion 92 a in which the pressing portion 91 a of the first pressurizing guide member 91 is disposed on the contact surface with the first pressurizing guide member 91. The second pressurizing guide member 92 is disposed between the first pressurizing guide member 91 and the vibrator 2 in a state where the pressing portion 91a of the first pressurizing guide member 91 is disposed in the groove portion 92a.

第１実施形態における与圧機構８は、振動子側ベース部材６の振動子ホルダ３が取り付けられる第一面６ａとは反対となる第二面６ｂに取り付けられる。そして、与圧機構８は、振動子２において、突起部２１を駆動伝達部材５側に圧接させるために設けるものである。よって、弾性材８１の弾性方向を、振動子２から駆動伝達部材５へ向けた方向（図４に示す矢印Ｂ方向）と略平行となるように配置する。この与圧機構８と連結される第一与圧ガイド部材９１には、図６に示す矢印Ｂ方向に引っ張られる力が作用する。そのため、第二与圧ガイド部材９２は、振動子ホルダ３が配置される側の振動子側ベース部材６の第一面６ａにおいて、矢印Ｂ方向に付勢される力によって、第一与圧ガイド部材９１の押圧部９１ａにより、振動子２側に押圧される。この結果、与圧機構８の付勢力が、与圧ガイド９を介して、振動子２を駆動伝達部材５側に圧接させる方向の押圧力として作用するのである。 The pressurizing mechanism 8 in the first embodiment is attached to the second surface 6b opposite to the first surface 6a to which the vibrator holder 3 of the vibrator side base member 6 is attached. The pressurizing mechanism 8 is provided in the vibrator 2 in order to press the protrusion 21 to the drive transmission member 5 side. Therefore, the elastic material 81 is arranged so that the elastic direction thereof is substantially parallel to the direction from the vibrator 2 toward the drive transmission member 5 (the direction of arrow B shown in FIG. 4). A force pulled in the direction of arrow B shown in FIG. 6 acts on the first pressurizing guide member 91 connected to the pressurizing mechanism 8. Therefore, the second pressurization guide member 92 is a first pressurization guide by the force urged in the arrow B direction on the first surface 6a of the transducer side base member 6 on the side where the transducer holder 3 is disposed. The pressing portion 91a of the member 91 is pressed toward the vibrator 2 side. As a result, the urging force of the pressurizing mechanism 8 acts as a pressing force in a direction in which the vibrator 2 is pressed against the drive transmission member 5 via the pressurizing guide 9.

第１実施形態では、第一与圧ガイド部材９１及び第二与圧ガイド部材９２によって、振動子側ベース部材６を噛合する構成とした。すなわち、与圧ガイド取付部６５として、与圧ガイド９が、振動子側ベース部材６の厚さ方向に噛合し、且つ、振動子２を駆動伝達部材５側に押圧する方向に摺動可能な切り欠き部を形成した。すなわち、第一与圧ガイド部材９１と第二与圧ガイド部材９２とで、与圧ガイド取付部６３を挟むようにして、両部材をビスで連結させる。この状態で、与圧ガイド９は、振動子２を駆動伝達部材４に押圧する方向に摺動可能に配置される。そして、ベース部材６の他面６ｂと、第一与圧ガイド部材９１の与圧機構連結部９１ｂ，９１ｂが当接する。 In the first embodiment, the vibrator-side base member 6 is engaged with the first pressurizing guide member 91 and the second pressurizing guide member 92. That is, as the pressurizing guide mounting portion 65, the pressurizing guide 9 is slidable in a direction that meshes with the vibrator side base member 6 in the thickness direction and presses the vibrator 2 toward the drive transmission member 5. A notch was formed. In other words, the first pressurizing guide member 91 and the second pressurizing guide member 92 are connected to each other with screws so that the pressurizing guide mounting portion 63 is sandwiched therebetween. In this state, the pressurizing guide 9 is slidably disposed in a direction in which the vibrator 2 is pressed against the drive transmission member 4. And the other surface 6b of the base member 6 and the pressurizing mechanism connecting portions 91b and 91b of the first pressurizing guide member 91 abut.

そして、振動子側ベース部材６は、振動子２を保持した振動子ホルダ３及び駆動伝達部材５が保持された状態で、基礎部材７に取り付けるための基礎部材接続部６６を備える。本実施の形態では、後述する基礎部材７の取付支柱７１に向けてビス止めするための開口を所定の位置に形成した。 The vibrator-side base member 6 includes a base member connecting portion 66 for attaching to the base member 7 in a state where the vibrator holder 3 holding the vibrator 2 and the drive transmission member 5 are held. In this embodiment, an opening for screwing toward a mounting column 71 of the foundation member 7 described later is formed at a predetermined position.

本件発明に係る振動モータでは、振動子側ベース部材は、アルミニウム、アルミニウム合金、チタン、チタン合金、ゲルマニウム、ゲルマニウム合金、鉄系合金、銅合金のいずれかを用いたものであることが好ましい。本件発明に係る振動モータでは、作動時に生ずる振動子２の振動と熱による弊害を防止すべく、振動子ホルダ３は、基礎部材に直接取り付けるのではなく、振動子側ベース部材に取り付ける構成とした。さらに、振動子側ベース部材を、上記材料により形成することによって、放熱性、耐振動性に優れた振動モータを提供可能とするものである。すなわち、振動子側ベース部材の材料として、アルミニウム、アルミニウム合金、チタン、チタン合金、ゲルマニウム、ゲルマニウム合金鉄系合金、銅合金のいずれかを選択することによって、振動子側ベース部材は、放熱性、耐振動性に優れ、軽量、材料コストを抑えることができる。特に、アルミニウム及びアルミニウム合金は、ダイキャスト法で、振動子側ベース部材を加工するのに適し、高精度な形状加工が可能となるのである。 In the vibration motor according to the present invention, the vibrator-side base member is preferably made of any one of aluminum, aluminum alloy, titanium, titanium alloy, germanium, germanium alloy, iron-based alloy, and copper alloy. In the vibration motor according to the present invention, the vibrator holder 3 is not attached directly to the base member, but is attached to the vibrator side base member in order to prevent harmful effects caused by vibration and heat of the vibrator 2 generated during operation. . Furthermore, by forming the vibrator-side base member from the above material, it is possible to provide a vibration motor having excellent heat dissipation and vibration resistance. That is, by selecting any of aluminum, aluminum alloy, titanium, titanium alloy, germanium, germanium alloy iron-based alloy, and copper alloy as the material of the vibrator side base member, the vibrator side base member Excellent vibration resistance, light weight, and low material cost. In particular, aluminum and aluminum alloys are suitable for processing the vibrator-side base member by the die-cast method, and high-precision shape processing becomes possible.

次に基礎部材について説明する。基礎部材は、図１及び図２に示すように、略平板状の基部７１に、振動子側ベース部材６を取り付けるための取付支柱７２，７２を備える。また、第１実施形態では、略平板状の基部７１が円形であり、且つ、中央部の図１に示すように、縁端部が円弧状の開口が形成されている。この基礎部材７の円弧状の縁端部側にレンズが配置されることにより、当該振動モータがレンズ外周領域に配置される。なお、本実施の形態では、基礎部材の基部を略中央部に円弧状の開口が形成された円形の例を示したが、これに限定されるものではなく、振動モータの設置位置に応じて適宜設計可能なものである。 Next, the foundation member will be described. As shown in FIGS. 1 and 2, the base member includes mounting columns 72 and 72 for mounting the vibrator-side base member 6 on a substantially flat base 71. Moreover, in 1st Embodiment, the substantially flat base 71 is circular, and as shown in FIG. 1 of the center part, the edge part has an arc-shaped opening. By arranging the lens on the arcuate edge side of the base member 7, the vibration motor is arranged in the lens outer peripheral region. In the present embodiment, an example of a circular shape in which an arcuate opening is formed in a substantially central portion of the base portion of the base member is shown, but the present invention is not limited to this, and depending on the installation position of the vibration motor It can be designed as appropriate.

以上に説明した振動子側ベース部材６に振動子ホルダ３、駆動伝達部材等が配置されて保持された状態で、当該振動子側ベース部材６を基礎部材７に取り付ける。すなわち、基礎部材７に設けられた取付支柱７１と、振動子側ベース部材６に形成された基礎部材接続部６６とを位置合わせし、ビスを用いて、振動子側ベース部材６を基礎部材７に取り付ける。ここで、取付支柱７１の高さを振動子２及び振動子ホルダ３の厚さに応じて設計し、振動子側ベース部材６が基礎部材７に取り付けられた状態で、振動子２が基礎部材７と離間するようにして固定される。このように、基礎部材７と振動子２との直接的な接触を避けて、振動子２の振動及び熱が基礎部材７側に伝わりにくくする。 The vibrator side base member 6 is attached to the base member 7 in a state where the vibrator holder 3, the drive transmission member, and the like are arranged and held on the vibrator side base member 6 described above. That is, the mounting support 71 provided on the base member 7 and the base member connecting portion 66 formed on the vibrator side base member 6 are aligned, and the vibrator side base member 6 is attached to the base member 7 using screws. Attach to. Here, the height of the mounting support 71 is designed according to the thickness of the vibrator 2 and the vibrator holder 3, and the vibrator 2 is the base member in a state where the vibrator-side base member 6 is attached to the base member 7. 7 and fixed so as to be spaced apart. Thus, direct contact between the base member 7 and the vibrator 2 is avoided, and the vibration and heat of the vibrator 2 are hardly transmitted to the base member 7 side.

この第１実施形態における振動モータ１を、レンズ鏡筒に配置して、レンズを光軸方向に直線移動させるレンズ駆動装置に使用した場合を説明する。第１実施形態における振動モータ１は、図１に示すように、基礎部材７の略中央部に円弧状の縁端部を備える開口が形成されており、この開口にレンズが配置可能となるように、当該振動モータ１をレンズ鏡筒に配置して使用することができる。このとき、振動子側ベース部材６は、当該振動子側ベース部材６の縁端部が、基礎部材７の円弧状の縁端部に沿って配置される構成とすることによって、振動モータをレンズ外周領域に近接配置することができる。また、第１実施形態の振動モータ１は、基礎部材７の基部７２となる平面方向における面積を小さくすることができるので、省スペース化を図ることができ、レンズ鏡筒に用いるその他の機構の配置との取り合いが容易となる。本実施の形態のように、本件発明に係る振動モータ１を、レンズ駆動装置に使用すると、レンズ駆動機構の省スペース化を図ると共に、フォーカシングやズーミング時の、レンズ鏡筒の静音化や低振動化を図ることができる。また、停止精度を向上させることができるので、確実なフォーカシングを速く行うことができる。 A case will be described in which the vibration motor 1 according to the first embodiment is used in a lens driving device that is arranged in a lens barrel and linearly moves a lens in an optical axis direction. As shown in FIG. 1, the vibration motor 1 according to the first embodiment is formed with an opening having an arcuate edge at a substantially central portion of the base member 7, and a lens can be disposed in this opening. In addition, the vibration motor 1 can be used by being arranged in a lens barrel. At this time, the vibrator-side base member 6 has a configuration in which the edge portion of the vibrator-side base member 6 is arranged along the arc-shaped edge portion of the base member 7 so that the vibration motor is a lens. It can be placed close to the outer peripheral area. In addition, since the vibration motor 1 of the first embodiment can reduce the area in the plane direction that becomes the base 72 of the base member 7, space can be saved, and other mechanisms used for the lens barrel can be obtained. Interfacing with the arrangement becomes easy. When the vibration motor 1 according to the present invention is used in a lens driving device as in the present embodiment, the lens driving mechanism can be saved in space, and the lens barrel can be reduced in noise and vibration during focusing and zooming. Can be achieved. In addition, since the stopping accuracy can be improved, reliable focusing can be performed quickly.

第２実施形態：図７は、本件発明に係る振動モータの第２実施形態を説明するための図であり、振動子側ベース部材６００に振動子ホルダ３並びに与圧機構８を取り付けた状態を示す平面図である。第２実施形態は、第１実施形態に比べて与圧機構の構成及び配置が異なる例である。すなわち、図７に示すように、与圧機構が、振動子側ベース部材６００の、振動子ホルダ３が設けられた第一面６００ａと同じ面に設けられた例である。このように、振動子側ベース部材６００の同一面に、振動子ホルダ３と与圧機構とを配置することによって、振動モータ１の厚さ方向を小さくすることができる。なお、第２実施形態では、振動子、振動子ホルダ、駆動伝達部材は第１実施形態と共通する。そこで、振動子２、振動子ホルダ３及び駆動伝達部材５についての説明は省略する。 Second Embodiment FIG. 7 is a view for explaining a second embodiment of the vibration motor according to the present invention, and shows a state in which the vibrator holder 3 and the pressurizing mechanism 8 are attached to the vibrator side base member 600. FIG. 2nd Embodiment is an example from which the structure and arrangement | positioning of a pressurization mechanism differ compared with 1st Embodiment. That is, as shown in FIG. 7, the pressurizing mechanism is an example provided on the same surface as the first surface 600a of the vibrator side base member 600 on which the vibrator holder 3 is provided. Thus, by arranging the vibrator holder 3 and the pressurizing mechanism on the same surface of the vibrator-side base member 600, the thickness direction of the vibration motor 1 can be reduced. In the second embodiment, the vibrator, the vibrator holder, and the drive transmission member are common to the first embodiment. Therefore, descriptions of the vibrator 2, the vibrator holder 3, and the drive transmission member 5 are omitted.

図８は、第２実施形態における振動子側ベース部材６００を示す平面図である。第２実施形態における振動子側ベース部材６００は、振動子ホルダ取付部６１０、駆動伝達部材配置孔６２０、切欠部６３０、基礎部材接続部６５０、与圧ガイド取付部６５０は、第１実施形態と共通するので説明を省略する。 FIG. 8 is a plan view showing a vibrator-side base member 600 according to the second embodiment. In the second embodiment, the vibrator-side base member 600 includes the vibrator holder mounting portion 610, the drive transmission member arrangement hole 620, the notch portion 630, the base member connecting portion 650, and the pressurizing guide mounting portion 650, as in the first embodiment. Since it is common, description is abbreviate | omitted.

第２実施形態における振動子側ベース部材６００は、振動子ホルダ３を設ける第一面側に、与圧機構取付部６０２ａ，６０２ｂを備える。与圧機構取付部６０２ａ，６０２ｂは、与圧アーム８０３を回動自在に取り付ける支柱６０２ａと、弾性材８０１を取り付ける係止部６０２ｂとからなり、当該振動子側ベース部材６の端部に突起状に形成される。 The vibrator-side base member 600 according to the second embodiment includes pressurizing mechanism attachment portions 602a and 602b on the first surface side where the vibrator holder 3 is provided. The pressurizing mechanism mounting portions 602a and 602b are composed of a support column 602a for rotatably mounting the pressurizing arm 803 and a locking portion 602b for mounting the elastic member 801, and projecting at the end of the vibrator side base member 6 Formed.

次に、与圧機構について説明する。図７に示すように、第２実施形態における与圧機構８００は、バネからなる弾性材８０１と、与圧アーム８０３とを備える。与圧アーム８０３は、その一方の端部が弾性材８０１と連結され、他方の端部が与圧ガイド部９に当接し、弾性材８０１の弾性力を用いて振動子２を駆動伝達部材５方向（図７に示す矢印Ｃ方向）に付勢可能に保持されている。すなわち、振動子側ベース部材６に突起状に形成された与圧機構取付部６０４に、弾性材８０１の一方の端部が係止される。そして、弾性材８０１の他方の端部は与圧アーム８０３と連結される。与圧アーム８０３は、弾性材８０１の弾性力を、てこの原理で所定の方向の押圧力とするものであり、振動子側ベース部材６００の第一面６００ａに突出した支柱からなる与圧機構取付部６０２に回動自在に取り付けられる。 Next, the pressurizing mechanism will be described. As shown in FIG. 7, the pressurizing mechanism 800 in the second embodiment includes an elastic member 801 made of a spring and a pressurizing arm 803. One end of the pressurizing arm 803 is connected to the elastic member 801, the other end abuts against the pressurizing guide 9, and the vibrator 2 is driven and transmitted by the elastic force of the elastic member 801. It is held so as to be urged in the direction (the direction of arrow C shown in FIG. 7). That is, one end portion of the elastic member 801 is locked to the pressurizing mechanism attaching portion 604 formed in a protruding shape on the vibrator side base member 6. The other end of the elastic member 801 is connected to the pressurizing arm 803. The pressurizing arm 803 uses the elastic force of the elastic member 801 as a pressing force in a predetermined direction based on the lever principle, and is a pressurizing mechanism including a support column protruding from the first surface 600a of the vibrator side base member 600. It is attached to the attachment portion 602 so as to be rotatable.

そして、与圧アーム８０３の加圧側端部８０５は与圧ガイド９に当接する。上述の与圧機構８００によって、与圧アーム８０３の加圧側端部８０５において、図７の矢印Ｃ方向に力が作用し、与圧ガイド９を加圧する。そして、当該与圧ガイド９を介して、振動子２を駆動伝達部材５に押圧して、振動子２の突起部２１を、駆動伝達部材５の駆動リング５１に圧接させる。この他、振動子２の振動の動作は、第１実施形態と同様である。また、第２実施形態においても、基礎部材の中央部に形成された円弧状の縁端部と同様の大きさのＲ形状の縁端部を備える構成とした。このような構成の振動モータを、レンズ駆動装置に用いると、レンズ外周領域に振動モータを近接配置することができる。 The pressurizing side end 805 of the pressurizing arm 803 contacts the pressurizing guide 9. A force acts in the direction of arrow C in FIG. 7 at the pressure side end 805 of the pressure arm 803 by the pressure mechanism 800 described above to pressurize the pressure guide 9. Then, the vibrator 2 is pressed against the drive transmission member 5 via the pressurizing guide 9, and the protrusion 21 of the vibrator 2 is brought into pressure contact with the drive ring 51 of the drive transmission member 5. In addition, the vibration operation of the vibrator 2 is the same as that of the first embodiment. Also in the second embodiment, an R-shaped edge portion having the same size as the arc-shaped edge portion formed in the central portion of the foundation member is provided. When the vibration motor having such a configuration is used in the lens driving device, the vibration motor can be disposed close to the lens outer peripheral region.

なお、上記第１実施形態ならびに第２実施形態では、振動子を保持する振動子ホルダと、これを保持する放熱性・耐振動性に優れた金属からなる振動子側ベース部材６，６００と、振動子側ベース部材６，６００を取り付ける基礎部材７とからなる振動モータの例を示したが、これに限定されるものではない。すなわち、第１実施形態ならびに第２実施形態では、振動子２を保持する振動子ホルダ３を、振動子側ベース部材６，６００とは別に有し、振動子ホルダ３を当該振動子側ベース部材６，６００に取り付け、この振動子側ベース部材６，６００を基礎部材７に取り付ける構成とした。しかし、この構成に限らず、例えば、振動子を保持するホルダ機能を、振動子側ベース部材に一体的に設けて、振動子側ベース部材が振動子を直接保持し、この振動子側ベース部材を基礎部材に取り付けることも可能である。これにより、ホルダ部品を別途用いる必要が無く、部品点数を削減し、コストダウンを図ることができる。 In the first embodiment and the second embodiment, the vibrator holder that holds the vibrator, and the vibrator-side base members 6 and 600 made of metal having excellent heat dissipation and vibration resistance for holding the vibrator, Although an example of a vibration motor including the base member 7 to which the vibrator side base members 6 and 600 are attached has been shown, the present invention is not limited to this. That is, in the first embodiment and the second embodiment, the vibrator holder 3 that holds the vibrator 2 is provided separately from the vibrator side base members 6 and 600, and the vibrator holder 3 is included in the vibrator side base member. The vibrator side base members 6 and 600 are attached to the base member 7. However, the present invention is not limited to this configuration. For example, a holder function for holding the vibrator is provided integrally with the vibrator side base member, and the vibrator side base member directly holds the vibrator. It is also possible to attach to the foundation member. Thereby, it is not necessary to use a holder part separately, the number of parts can be reduced, and the cost can be reduced.

本件発明に係る振動モータは、省スペース化だけでなく、振動モータの作動時に生じる振動や熱による影響を低減できるので、小型の光学系のレンズ駆動機構の他、小型且つ高機能な家電や各種小型機器における可動機構の駆動源として利用でき、高精度制御と、耐久性に優れた可動装置の提供が可能となる。 The vibration motor according to the present invention not only saves space, but also can reduce the effects of vibration and heat generated during operation of the vibration motor. It can be used as a drive source for a movable mechanism in a small device, and it is possible to provide a movable device with high precision control and excellent durability.

１・・・・振動モータ
２・・・・振動子
３・・・・振動子ホルダ
５・・・・駆動伝達部材
６・・・・振動子側ベース部材
６ａ・・・・振動子側ベース部材の第一面
６ｂ・・・・振動子側ベース部材の第二面
７・・・・基礎部材
８・・・・与圧機構
９・・・・与圧ガイド
６３・・・・切欠部
７１・・・・取付支柱
８１・・・・弾性材 DESCRIPTION OF SYMBOLS 1 ... Vibration motor 2 ... Vibrator 3 ... Vibrator holder 5 ... Drive transmission member 6 ... Vibrator side base member 6a ... Vibrator side base member First surface 6b of the vibrator side base member 7 ... Basic member 8 ... Pressure mechanism 9 ... Pressure guide 63 ... Notch 71 ... ... Mounting post 81 ... Elastic material

Claims

与圧機構によって振動子を駆動伝達部材方向に付勢することにより、振動子を駆動伝達部材に圧接させ、振動子を振動させ、当該振動子に圧接された駆動伝達部材に振動子の振動を伝達することによって、駆動伝達部材を作動させる振動モータであって、
振動子と、
当該振動子を保持する振動子側ベース部材と、
当該振動子側ベース部材が取り付けられる基礎部材とを備え、
前記振動子側ベース部材を基礎部材に取り付けた状態で、振動子が基礎部材と離間するようにして固定したことを特徴とする振動モータ。 By urging the vibrator toward the drive transmission member by the pressurizing mechanism, the vibrator is pressed against the drive transmission member, the vibrator is vibrated, and the vibration of the vibrator is applied to the drive transmission member pressed against the vibrator. A vibration motor that operates a drive transmission member by transmitting,
A vibrator,
A vibrator-side base member that holds the vibrator;
A base member to which the transducer-side base member is attached;
A vibration motor, wherein the vibrator is fixed so as to be separated from the base member in a state where the vibrator side base member is attached to the base member.

前記振動子を保持する振動子ホルダを有し、
前記振動子側ベース部材は、当該振動子ホルダを保持する請求項１に記載の振動モータ。 Having a vibrator holder for holding the vibrator;
The vibration motor according to claim 1, wherein the vibrator-side base member holds the vibrator holder.

前記振動子側ベース部材は、アルミニウム、アルミニウム合金、チタン、チタン合金、ゲルマニウム、ゲルマニウム合金、鉄系合金、銅合金のいずれかを用いたものである請求項１又は請求項２に記載の振動モータ。 3. The vibration motor according to claim 1, wherein the vibrator-side base member uses any one of aluminum, aluminum alloy, titanium, titanium alloy, germanium, germanium alloy, iron-based alloy, and copper alloy. .

前記基礎部材には、振動子側ベース部材を取り付けるための取付支柱を備え、当該取付支柱を介して、基礎部材と振動子側ベース部材とが結合された請求項１〜請求項３のいずれかに記載の振動モータ。 The base member is provided with a mounting column for mounting the vibrator side base member, and the base member and the vibrator side base member are coupled via the mounting column. The vibration motor described in 1.

前記振動子側ベース部材には、前記振動子ホルダが配置される部分に、切欠部が形成された請求項１〜請求項４のいずれかに記載の振動モータ。 The vibration motor according to any one of claims 1 to 4, wherein the vibrator-side base member is formed with a notch in a portion where the vibrator holder is disposed.

前記与圧機構が、前記振動子側ベース部材の、振動子ホルダが設けられた第一面と同じ面に設けられ、
当該与圧機構は弾性材を備え、
当該与圧機構は、前記弾性材により、振動子を駆動伝達部材方向に付勢可能に、前記振動子側ベース部材の第一面側に取り付けられた請求項１〜請求項５のいずれかに記載の振動モータ。 The pressurizing mechanism is provided on the same surface as the first surface of the vibrator-side base member on which the vibrator holder is provided;
The pressurizing mechanism includes an elastic material,
The pressurizing mechanism is attached to the first surface side of the vibrator-side base member so as to be able to bias the vibrator toward the drive transmission member by the elastic material. The vibration motor described.

当該与圧機構は、前記振動子側ベース部材の、振動子ホルダが設けられた第一面とは異なる第二面に設けられた請求項１〜請求項５のいずれかに記載の振動モータ。 The vibration motor according to claim 1, wherein the pressurizing mechanism is provided on a second surface of the vibrator-side base member that is different from the first surface on which the vibrator holder is provided.

前記第二面には、前記振動子が前記駆動伝達部材に押圧される方向と略平行となる方向に伸縮する弾性材からなる与圧機構が設けられ、
前記振動子側ベース部材の厚さ方向に噛合し、且つ、前記振動子が前記駆動伝達部材に押圧される方向に摺動可能な与圧ガイドを備え、
当該与圧ガイドを介して、弾性材の付勢力を前記振動子を駆動伝達部材方向に伝達させて、振動子を駆動伝達部材に圧接させる請求項７に記載の振動モータ。 The second surface is provided with a pressurizing mechanism made of an elastic material that expands and contracts in a direction substantially parallel to a direction in which the vibrator is pressed against the drive transmission member.
A pressurizing guide that meshes in the thickness direction of the vibrator-side base member and that can slide in a direction in which the vibrator is pressed against the drive transmission member;
The vibration motor according to claim 7, wherein an urging force of an elastic material is transmitted to the drive transmission member via the pressurizing guide so that the vibrator is pressed against the drive transmission member.

レンズを光軸方向に直線移動させるレンズ駆動装置であって、
請求項１〜請求項８のいずれかに記載の振動モータでレンズを移動させることを特徴とするレンズ駆動装置。 A lens driving device that linearly moves the lens in the optical axis direction,
A lens driving apparatus, wherein the lens is moved by the vibration motor according to claim 1.