JP2000166266A - Vibration-type driving device and equipment therewith - Google Patents

Vibration-type driving device and equipment therewith

Info

Publication number
JP2000166266A
JP2000166266A JP10337019A JP33701998A JP2000166266A JP 2000166266 A JP2000166266 A JP 2000166266A JP 10337019 A JP10337019 A JP 10337019A JP 33701998 A JP33701998 A JP 33701998A JP 2000166266 A JP2000166266 A JP 2000166266A
Authority
JP
Japan
Prior art keywords
vibration
vibrating body
driving device
contact surface
sliding contact
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP10337019A
Other languages
Japanese (ja)
Inventor
Takayuki Shirasaki
隆之 白崎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP10337019A priority Critical patent/JP2000166266A/en
Publication of JP2000166266A publication Critical patent/JP2000166266A/en
Pending legal-status Critical Current

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  • Lens Barrels (AREA)
  • General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)

Abstract

PROBLEM TO BE SOLVED: To avoid the reduction in the flatness of a slide contact surface and to reduce the wear of both the slide contact surfaces by forming the slide contact surface of a traveling body with a composite resin layer where at least a reinforcing agent is contained in resin or a resin composition. SOLUTION: The cured film of electroless nickel plating is formed on the slide contact surface of a vibration body 2, a piezoelectric element 1 is sealed to a piezoelectric sealing surface at the opposite side, and further a flexible printed circuit board is sealed to the electrode surface of the surface for composing a stator. An annular traveling body 7 is concentrically engaged to the outer- periphery part of a middle member 15 and is composed of a support 5 that is annularly made of an aluminum alloy and a composite resin layer 6 that is concentrically sealed to the surface by an adhesive material. The composite resin layer 6 is formed by filling carbon fiber into a thermoplastic resin as a reinforcing material and further fluorine and graphite powder as a lubrication material, thus avoiding the reduction in the flatness of a vibration body slide contact surface and reducing the amount of wear of both the slide contact surfaces.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は振動型駆動装置およ
びそれを用いた機器に関し、さらに詳しくは振動型駆動
装置の構成部材である、振動体或はステータの加工を施
した装置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration type driving device and an apparatus using the same, and more particularly, to a device in which a vibration member or a stator which is a component of the vibration type driving device is processed. .

【0002】[0002]

【従来の技術】従来の振動型駆動装置において、振動体
は母材にマルテンサイト系のステンレス、例えばSUS
420J2を用い, (1)機械加工し所定の形状寸法に
仕上げた後、(2)無電解メッキ、例えば平均粒子径が
1μm程度のフッ樹脂(PTFE)を、体積比で5%均
一に共析した無電解ニッケルメッキ膜を、厚さ25μm
程度に形成し、(3)360℃以下の温度で加熱処理し
硬化膜とし、(4)次に振動体の圧電素子固着面の硬化
膜を、研磨機によるラップ加工で除去しながら平面度だ
しをおこない、所定の平面度(3μm以下)と中心線平
均粗さRa(0.1μm以下)の圧電素子固着面を形成
し、(5)最後に、振動体の硬化膜の摺接面を、上記と
同じ方式で加工し、硬化膜を10μm以下の厚みで除去
し、所定の平面度(3μm以下)と中心線平均粗さRa
(0.03μm以下)の精度としていた。
2. Description of the Related Art In a conventional vibration type driving device, a vibrating body is made of a martensitic stainless steel such as SUS as a base material.
Using 420J2, (1) machining and finishing to a predetermined shape and size, (2) electroless plating, for example, fluororesin (PTFE) having an average particle diameter of about 1 μm is uniformly co-deposited at a volume ratio of 5%. 25mm thick electroless nickel plating film
(3) Heat treatment at a temperature of 360 ° C. or less to form a cured film. (4) Next, the cured film on the piezoelectric element fixing surface of the vibrating body is flattened while being removed by lapping using a polishing machine. To form a piezoelectric element fixing surface having a predetermined flatness (3 μm or less) and a center line average roughness Ra (0.1 μm or less). (5) Finally, the sliding contact surface of the cured film of the vibrator is Processing is performed in the same manner as above, and the cured film is removed with a thickness of 10 μm or less, a predetermined flatness (3 μm or less) and a center line average roughness Ra.
(0.03 μm or less).

【0003】尚、(2)の工程で、圧電素子固着面をマ
スキングをして無電解メッキ処理をし、(4)の工程
を、平面度だし加工のみにしてもよい。
In the process (2), the surface to which the piezoelectric element is fixed may be masked and subjected to electroless plating, and the process (4) may be performed only for flatness.

【0004】次に、ステータであるが、上記(1)〜
(5)の工程を経た振動体は、(6)圧電素子固着面に
圧電素子をエポキシ系の接着材を用いて貼り合せ、加圧
した状態で100℃、1 時間の加熱処理で固着し、
(7)さらに、上記の圧電素子の電極面上にフレキシブ
ルプリント板を、やはり加圧して100℃、1 時間で固
着して、ステータ(固定子)を構成していた。
Next, regarding the stator, the above (1) to (4)
The vibrating body having undergone the process of (5) is bonded to the piezoelectric element fixing surface by using an epoxy-based adhesive (6), and is fixed by heating at 100 ° C. for 1 hour in a pressurized state.
(7) Further, a flexible printed board is fixed on the electrode surface of the piezoelectric element at 100 ° C. for 1 hour by applying pressure to form a stator.

【0005】振動体の摺接面に、無電解メッキを施工
し、加熱処理して、硬化膜を形成するのは、この振動体
の摺接面に接触する移動体を、相対的に摩擦駆動する振
動型駆動装置(振動波モータ)において、樹脂又は樹脂
組成物に少なくとも強化材を含有させた複合樹脂層の摺
接面を有する前記移動体との組み合わせで、安定した摩
擦駆動であって、且つ磨耗が少ない長時間寿命の振動波
モータを得るためである。
[0005] Electroless plating is applied to the sliding contact surface of the vibrating body, and heat treatment is performed to form a hardened film. The moving body that contacts the sliding contact surface of the vibrating body is relatively driven by friction. In the vibration type driving device (vibration wave motor), in combination with the moving body having a sliding contact surface of a composite resin layer containing at least a reinforcing material in a resin or a resin composition, stable friction drive, This is to obtain a long-life vibration wave motor with little wear.

【0006】上記の無電解メッキには、均一な厚みの膜
が形成でき、その硬度はビッカース硬さ(Hv)で70
0〜1000と高く、且つ適度の靭性を有する自己潤滑
性の硬化膜を用いている。
[0006] In the above electroless plating, a film having a uniform thickness can be formed, and its hardness is 70 in Vickers hardness (Hv).
A self-lubricating cured film having a high toughness of 0 to 1000 and appropriate toughness is used.

【0007】上記の移動体の複合樹脂層は、ガラス転移
点が100℃以上の熱可塑性樹脂、例えばポリエーテル
ニトリル(出光社、PEN)をベース樹脂とし、強化材
としてPAN系の炭素繊維を重量比で10〜25%充填
しており、必要に応じて、潤滑剤であるフッ素樹脂(P
TFE)及び黒鉛粉末を付加することもある。
The composite resin layer of the above-mentioned moving body is made of a thermoplastic resin having a glass transition point of 100 ° C. or higher, for example, polyether nitrile (Idemitsu, PEN) as a base resin, and a PAN-based carbon fiber as a reinforcing material. 10 to 25% by weight, and if necessary, a fluororesin (P
TFE) and graphite powder may be added.

【0008】フッ素樹脂(PTFE)の充填は、振動体
の硬化膜の摺接面に、PTFEの移着膜を形成し、両摺
接面の潤滑性を向上させ、摩擦係数の安定化と、硬化膜
及び複合樹脂層両摺接面の摩耗を、少なくするためであ
る。
[0008] Filling with a fluororesin (PTFE) forms a transfer film of PTFE on the sliding surface of the cured film of the vibrator, improves the lubricating properties of both sliding surfaces, stabilizes the friction coefficient, This is because wear of the sliding contact surfaces of both the cured film and the composite resin layer is reduced.

【0009】[0009]

【発明が解決しようとする課題】しかしながら、上記の
ような従来の振動型駆動装置において、平面度3μm以
下、面粗さRaが0.03μm以下と、良い摺接面精度
の振動体も、圧電素子及びフレキシブルプリント板を固
着してステータを構成すると、ステータを構成する振動
体の摺接面の平面度は5μm以上と、低下していた。そ
のため振動体の摺接面と、移動体の摺接面との円周方向
の接触状態がやや悪く、モータの性能、精度、或は両摺
接面の摩耗の点で課題となっていた。
However, in the above-mentioned conventional vibration type driving apparatus, the vibrating body having a flatness of 3 μm or less and a surface roughness Ra of 0.03 μm or less has a good sliding contact surface accuracy. When the stator is formed by fixing the element and the flexible printed board, the flatness of the sliding contact surface of the vibrator constituting the stator has been reduced to 5 μm or more. For this reason, the circumferential contact state between the sliding contact surface of the vibrating body and the sliding contact surface of the moving body is slightly poor, and this has been a problem in terms of motor performance, accuracy, and wear of both sliding contact surfaces.

【0010】ステータの摺接面の平面度が、やや低下し
たのは、振動体の圧電素子固着面に、圧電素子を貼り合
わせ、加圧した状態で100℃の高温で固着し、次に振
動体に固着した圧電素子の電極面に、さらにフレキシブ
ルプリント板を加圧加熱して固着するという工程のため
である。
[0010] The flatness of the sliding contact surface of the stator was slightly reduced because the piezoelectric element was bonded to the piezoelectric element fixing surface of the vibrating body, and was fixed at a high temperature of 100 ° C in a pressurized state. This is because the flexible printed board is further fixed to the electrode surface of the piezoelectric element fixed to the body by pressurizing and heating.

【0011】本発明の目的は、ステータを構成している
振動体の硬化膜の摺接面平面度の低下を回避して性能及
び精度が安定し、振動体及び移動体の両摺接面の接触状
態が大幅に改善され、摩耗が少ない振動型駆動装置およ
びそれを用いた機器を提供することを目的とするもので
ある。
An object of the present invention is to avoid a decrease in the flatness of the sliding surface of the cured film of the vibrating body constituting the stator, to stabilize the performance and accuracy, and to make the sliding surface of both the vibrating body and the moving body invisible. It is an object of the present invention to provide a vibration-type drive device in which the contact state is greatly improved and wear is small, and an apparatus using the same.

【0012】[0012]

【課題を解決するための手段】即ち、本発明は、振動体
と圧電素子を有するステータを具備し、前記圧電素子を
固着する圧電素子固着面及び摺接面を有し、振動が励起
される振動体と、前記振動体の摺接面に接触する移動体
とを、相対的に摩擦駆動する振動型駆動装置において、
前記ステータが、振動体に無電解メッキを施した後、前
記圧電素子固着面に圧電素子を固着し、該圧電素子の電
極面にフレキシブルプリント板を固着した後、前記振動
体の無電解メッキ硬化膜の摺接面を平面度だし加工をし
て平面に形成してなり、かつ前記移動体の摺接面を樹脂
又は樹脂組成物に少なくとも強化材を含有させた複合樹
脂層で形成してなることを特徴とする振動型駆動装置で
ある。
That is, the present invention comprises a stator having a vibrating body and a piezoelectric element, and has a piezoelectric element fixing surface for fixing the piezoelectric element and a sliding contact surface, and vibration is excited. In a vibration-type driving device that relatively drives a vibrating body and a moving body that comes into contact with a sliding contact surface of the vibrating body,
After the stator performs electroless plating on the vibrating body, a piezoelectric element is fixed on the piezoelectric element fixing surface, and a flexible printed board is fixed on the electrode surface of the piezoelectric element. The sliding contact surface of the film is flattened to form a flat surface, and the sliding contact surface of the moving body is formed of a resin or a composite resin layer containing at least a reinforcing material in a resin composition. A vibration-type drive device characterized by the above-mentioned.

【0013】前記無電解メッキ硬化膜の厚みが10μm
以上であるのが好ましい。前記無電解メッキが、無電解
ニッケルメッキであるのが好ましい。前記無電解メッキ
が、フッ素樹脂を共析する無電解ニッケルメッキである
のが好ましい。前記無電解メッキが、三元合金の無電解
ニッケルメッキであるのが好ましい。
The thickness of the electroless plating cured film is 10 μm.
It is preferable that this is the case. Preferably, the electroless plating is electroless nickel plating. Preferably, the electroless plating is electroless nickel plating in which a fluororesin is eutectoid. Preferably, the electroless plating is a ternary alloy electroless nickel plating.

【0014】前記無電解メッキが、360℃以下で加熱
硬化処理されているのが好ましい。前記振動体の母材
が、マルテンサイト系ステンレス鋼であるのが好まし
い。前記振動体の母材が、ステンレス系或いは鉄系の焼
結合金であるのが好ましい。前記振動体は、機械加工の
前或は後に応力除去熱処理をおこなうのが好ましい。
It is preferable that the electroless plating is heat-cured at 360 ° C. or lower. It is preferable that the base material of the vibrating body is martensitic stainless steel. It is preferable that the base material of the vibrating body is a stainless-based or iron-based sintered alloy. The vibrating body is preferably subjected to a stress relief heat treatment before or after machining.

【0015】前記振動体の無電解メッキ硬化膜の摺接面
の平面だし加工が研磨加工或いは研磨材を含む回転平定
盤での研削加工であるのが好ましい。前記振動体の硬化
膜の摺接面は、平面度が5μm以下、中心線平均粗さR
a(μm)が0.4以下の平面であるのが好ましい。前
記移動体の複合樹脂層の摺接面は、研磨加工或いは研磨
剤を含む回転平定盤で研削加工され、平面或いはテーパ
面の摺接面に形成されるのが好ましい。
It is preferable that the flattening process of the sliding contact surface of the hardened electroless plating film of the vibrating body is a polishing process or a grinding process with a rotary flat plate containing an abrasive. The sliding surface of the cured film of the vibrator has a flatness of 5 μm or less and a center line average roughness R
It is preferable that a (μm) is a plane of 0.4 or less. The sliding contact surface of the composite resin layer of the moving body is preferably ground or ground by a rotary flat plate containing an abrasive, and is preferably formed as a flat or tapered sliding contact surface.

【0016】また、本発明は、圧電素子固着面及び摺接
面を有し、振動が励起される振動体と、この振動体の前
記摺接面に接触する移動体とを、相対的に摩擦駆動する
振動型駆動装置において、前記振動体は無電解メッキを
施工したあと、前記振動体固着面に圧電素子を固着し、
該圧電素子の電極面にフレキシブルプリント板を固着し
てステータを形成し、前記ステータをモータ基板に固定
したあと、前記振動体の無電解メッキの硬化膜の摺接面
を平面度だし加工をして摺接面を平面のステータとした
ことを特徴とする振動型駆動装置である。
According to the present invention, a vibrating body having a piezoelectric element fixing surface and a sliding contact surface, in which vibration is excited, and a moving body which comes into contact with the sliding contact surface of the vibrating body, are relatively rubbed. In the vibration type driving device to be driven, after the vibrating body is subjected to electroless plating, a piezoelectric element is fixed to the vibrating body fixing surface,
A flexible printed board is fixed to the electrode surface of the piezoelectric element to form a stator, and the stator is fixed to a motor substrate. Then, the sliding contact surface of the cured film of the electroless plating of the vibrator is flattened. A vibration type driving device characterized in that the sliding contact surface is a flat stator.

【0017】また、本発明は上記の振動波駆動装置から
なることを特徴とする振動波モータである。さらに、本
発明は、上記の振動波駆動装置または振動波モータを駆
動源として設けたことを特徴とする機器である。
According to the present invention, there is provided a vibration wave motor comprising the above vibration wave driving device. Further, the present invention is a device provided with the above-mentioned vibration wave driving device or vibration wave motor as a driving source.

【0018】[0018]

【発明の実施の形態】本発明では、圧電素子固着面及び
摺接面を有し、振動が励起される振動体と、この振動体
の前記摺接面に接触する移動体とを、相対的に摩擦駆動
する振動型駆動装置において、前記振動体は無電解メッ
キを施工したあと、前記振動体固着面に圧電素子を固着
し、前記圧電素子の電極面にフレキシブルプリント板を
固着し、最後に前記振動体の無電解メッキ硬化膜の摺接
面を、平面度だし加工をして、摺接面が平面のステータ
を形成する。一方の移動体の摺接面を、樹脂又は樹脂組
成物に、少なくとも強化材を含有させた複合樹脂層で形
成する。この様にして形成したステータを用いることに
より、ステータを構成している振動体の硬化膜の摺接面
平面度の低下を回避して、性能及び精度が安定し、振動
体及び移動体の両摺接面の摩耗が少ない振動型駆動装置
を得ることができる。
DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a vibrating body having a piezoelectric element fixing surface and a sliding contact surface, and which is excited by vibration, and a moving body which comes into contact with the sliding contact surface of the vibrating body are relatively positioned. In a vibration-type driving device that frictionally drives, after the vibrating body is subjected to electroless plating, a piezoelectric element is fixed to the vibrating body fixing surface, a flexible printed board is fixed to the electrode surface of the piezoelectric element, and finally, The sliding contact surface of the hardened electroless plating film of the vibrator is flattened to form a stator having a flat sliding contact surface. The sliding contact surface of one of the moving bodies is formed of a composite resin layer containing at least a reinforcing material in a resin or a resin composition. By using the stator formed in this way, it is possible to avoid a decrease in the flatness of the slidable surface of the cured film of the vibrating body constituting the stator, to stabilize the performance and accuracy, and to improve both the vibrating body and the moving body. It is possible to obtain a vibration type driving device in which abrasion of the sliding contact surface is small.

【0019】また、前記無電解メッキは、厚みが10μ
m以上の無電解ニッケルメッキであり、具体的には、フ
ッ素樹脂(PTFE)を共析する無電解ニッケル又は三
元合金の無電解ニッケルで、360℃以下で加熱硬化処
理されている。
The electroless plating has a thickness of 10 μm.
m or more, and more specifically, is heat-hardened at 360 ° C. or less with electroless nickel or a ternary alloy of eutectoid fluorine resin (PTFE).

【0020】振動体の母材は、マルテンサイト系のステ
ンレス、又はステンレス系或いは鉄系の焼結合金であ
り、振動体は機械加工の前或は後に、応力除去熱処理さ
れる。
The base material of the vibrating body is a martensitic stainless steel or a stainless steel or iron based sintered alloy, and the vibrating body is subjected to a stress relief heat treatment before or after machining.

【0021】振動体の無電解メッキの硬化膜の摺接面
が、研磨加工、或は研磨剤を含む回転平定盤での研削加
工され、摺接面は平面度が5μm以下、中心線平均粗さ
Ra(μm) が0.4以下の平面とするのが好ましい。
一方、移動体の複合樹脂層は、研磨加工、或は研磨剤を
含む回転平定盤で研削加工され、平面或はテーパ面とし
て形成されるのが好ましい。
The sliding surface of the cured film of the electroless plating of the vibrating body is polished or ground by a rotary flat plate containing an abrasive, and the sliding surface has a flatness of 5 μm or less and a center line average roughness. It is preferable that the surface Ra (μm) is 0.4 or less.
On the other hand, the composite resin layer of the moving body is preferably formed as a flat surface or a tapered surface by a grinding process or a grinding process with a rotating flat plate containing an abrasive.

【0022】本発明の振動波駆動装置は、例えば振動波
モータ、紙送り装置、リニアモータ等に用いることがで
きる。また、本発明の振動波駆動装置は、駆動源として
各種の機器に用いることができる。機器の具体例として
は、カメラなどの光学機器、プリンター,複写機等の事
務機器、パワーウインドー,アクティブサスペンション
等の自動車関連機器が挙げられる。
The vibration wave driving device of the present invention can be used for, for example, a vibration wave motor, a paper feeder, a linear motor, and the like. Further, the vibration wave driving device of the present invention can be used for various devices as a driving source. Specific examples of the equipment include optical equipment such as a camera, office equipment such as a printer and a copying machine, and automobile-related equipment such as a power window and an active suspension.

【0023】[0023]

【実施例】以下に実施例を挙げて本発明を具体的に説明
する。
EXAMPLES The present invention will be specifically described below with reference to examples.

【0024】実施例1 図1は本発明の振動型駆動装置の例として振動波モータ
を示す断面図である。図2は図1の振動波モータを構成
する振動体と移動体の部分拡大断面図である。図3は振
動体等で構成するステータを示す概略図であり、図3
(a)はステータの背面図、図3(b)はAA線断面図
を示す。
Embodiment 1 FIG. 1 is a sectional view showing a vibration wave motor as an example of a vibration type driving device according to the present invention. FIG. 2 is a partially enlarged sectional view of a vibrating body and a moving body constituting the vibration wave motor of FIG. FIG. 3 is a schematic view showing a stator constituted by a vibrator or the like.
3A is a rear view of the stator, and FIG. 3B is a cross-sectional view taken along line AA.

【0025】これらの図において、1は薄いリング状の
圧電素子である。2は弾性材料の振動体であり、この振
動体2の摺接面には、λ/2あたり4個の突起(くし
歯)が等間隔で、全周にわたって形成されている。そし
て、各くし歯の表面(摺接面)には、厚さが25μm以
下であり、200℃で硬化処理をして、ビッカース硬さ
(Hv)が約900の三元合金の無電解ニッケルメッキ
(Ni−P−B)の硬化膜が形成されている。
In these figures, reference numeral 1 denotes a thin ring-shaped piezoelectric element. Reference numeral 2 denotes a vibrating body made of an elastic material, and four projections (comb teeth) per λ / 2 are formed on the sliding contact surface of the vibrating body 2 at equal intervals over the entire circumference. Then, the surface (sliding contact surface) of each comb tooth is subjected to a hardening treatment at 200 ° C. and a Vickers hardness (Hv) of about 900 with a ternary alloy of electroless nickel plating having a thickness of 25 μm or less. A cured film of (Ni-P-B) is formed.

【0026】又振動体2の摺接面と反対側の圧電素子固
着面には、圧電素子1が固着されており、この圧電素子
1の表面の電極面には、更にフレキシブルプリント板1
6が固着されていて、この三部品でステータ18を構成
している。(図3参照)
A piezoelectric element 1 is fixed to the piezoelectric element fixing surface of the vibrating body 2 opposite to the sliding contact surface, and a flexible printed board 1 is further attached to the electrode surface on the surface of the piezoelectric element 1.
6 are fixed, and the three parts constitute the stator 18. (See Fig. 3)

【0027】図1において、3はこの振動波モータのモ
ータ基板で、振動体2が、ビス4により同心的に固定さ
れている。またモータ基板3の中心部には、第1ボール
軸受け11の外輪が固着されている。10は回転軸であ
り、この回転軸10の軸方向中間部には、中間部材15
が、例えば、焼ばめ等の方法で固着されている。回転軸
10の一端は、第1ボール軸受け11の内輪に、軸方向
に摺動可能に支持され、他端は、第2ボール軸受け12
の内輪に、軸方向に摺動可能に支持されている。第2ボ
ール軸受け12の外輪は、モータ基板3にネジ9で固定さ
れた基板カバー8の中心部に固着されている。
In FIG. 1, reference numeral 3 denotes a motor substrate of the vibration wave motor, and a vibrating body 2 is fixed concentrically by screws 4. The outer race of the first ball bearing 11 is fixed to the center of the motor board 3. Reference numeral 10 denotes a rotation shaft. An intermediate member 15 is provided at an intermediate portion of the rotation shaft 10 in the axial direction.
Are fixed by a method such as shrink fitting. One end of the rotating shaft 10 is supported by the inner ring of the first ball bearing 11 so as to be slidable in the axial direction, and the other end is connected to the second ball bearing 12.
Are supported slidably in the axial direction. The outer ring of the second ball bearing 12 is fixed to the center of a board cover 8 fixed to the motor board 3 with screws 9.

【0028】中間部材15の外周部には、リング状の移
動体7が、同心的に嵌合して設けられている。この移動
体7は、アルミ合金で環状に作られた支持体5と、この
支持体5の表面に接着剤により、同心的に固着された複
合樹脂層6とで構成されている。複合樹脂層6 は、ガラ
ス転移点が100℃以上の熱可塑性樹脂である出光マテ
リアル社のポリエーテルニトリル(出光PEN)に、強
化材としてPAN系の炭素繊維を重量比で20%、更に
潤滑剤としてフッ素樹脂(PTFE)と黒鉛粉末を、重
量比でそれぞれ10%と5%充填したものである。
A ring-shaped moving body 7 is provided on the outer peripheral portion of the intermediate member 15 so as to fit concentrically. The moving body 7 includes a support 5 made of an aluminum alloy in a ring shape, and a composite resin layer 6 concentrically fixed to the surface of the support 5 with an adhesive. The composite resin layer 6 is made of a thermoplastic resin having a glass transition point of 100 ° C. or higher, polyethernitrile (Idemitsu PEN) manufactured by Idemitsu Material Co., Ltd., and 20% by weight of PAN-based carbon fiber as a reinforcing material, and a lubricant. Are filled with 10% and 5% by weight of a fluorine resin (PTFE) and graphite powder, respectively.

【0029】尚支持体5は、図2に示すように、中間部
材15のフランジ部に連結される固定部5bと、複合樹
脂層6が固着される摺動部5aと、摺動部5aと固定部
5bを連結する薄肉部分を有する連結部5cで構成され
ている。
As shown in FIG. 2, the support 5 includes a fixing portion 5b connected to the flange portion of the intermediate member 15, a sliding portion 5a to which the composite resin layer 6 is fixed, and a sliding portion 5a. It is composed of a connecting portion 5c having a thin portion connecting the fixing portion 5b.

【0030】又、支持体5における固定部5bと、中間
部材15のフランジ部との間には、ゴム製の弾性シート
部材17が介在しており、中間部材15と、第2ボール
軸受け12の内輪との間に設けられた、圧縮ばね部材1
4が発生する、軸方向加圧力が、この弾性シート部材1
7を介して、支持体5に、軸方向に作用する構成となっ
ている。この軸方向加圧力により、移動体7の摺接面
(複合樹脂層6の表面)は、振動体2の摺接面に圧接さ
れる。
An elastic sheet member 17 made of rubber is interposed between the fixed portion 5b of the support 5 and the flange portion of the intermediate member 15, and the intermediate member 15 and the second ball bearing 12 Compression spring member 1 provided between inner ring
4 is generated, the axial pressing force is applied to the elastic sheet member 1.
It is configured to act on the support body 5 in the axial direction via 7. By this axial pressure, the sliding contact surface of the moving body 7 (the surface of the composite resin layer 6) is pressed against the sliding contact surface of the vibrating body 2.

【0031】尚、圧縮ばね部材14が発生する軸方向加
圧力(駆動用加圧力)は、第2ボール軸受け12の内輪
と、圧縮ばね部材14との間に設けられた、不図示のス
ペーサ部材によって調整することができる。
The axial pressing force (drive pressing force) generated by the compression spring member 14 is a spacer member (not shown) provided between the inner ring of the second ball bearing 12 and the compression spring member 14. Can be adjusted by

【0032】次に、図3(a),(b)に示す圧電素子
1、振動体2及びフレキシブルプリント板16からなる
ステータ18の加工工程を説明する。
Next, a description will be given of the processing steps of the stator 18 composed of the piezoelectric element 1, the vibrating body 2 and the flexible printed board 16 shown in FIGS. 3 (a) and 3 (b).

【0033】先ず、振動体は、 機械加工をおこない所定の形状寸法にする。 無電解メッキ、例えば三元合金の無電解メッキを、厚
みが25μm程度で施工する。 例えば、200℃で加熱処理して、メッキ膜を高硬度
で適度の靭性を有する硬化膜とする。 圧電素子固着面の硬化膜を除去しつつ、固着面の平面
度だし加工を行う。
First, the vibrating body is machined to a predetermined shape and size. Electroless plating, for example, ternary alloy electroless plating is applied to a thickness of about 25 μm. For example, heat treatment is performed at 200 ° C. to make the plating film a cured film having high hardness and appropriate toughness. The flatness of the fixed surface is processed while removing the cured film on the fixed surface of the piezoelectric element.

【0034】上記のの工程の、前或いは後に応力除去
熱処理を行っても良く、またの工程で、圧電素子固着
面はマスキングして、メッキ膜が形成しないようにし
て、の工程では、固着面の平面度だし加工に限っても
良い。
The stress relief heat treatment may be performed before or after the above-mentioned step. In the other step, the piezoelectric element fixing surface is masked so that a plating film is not formed. May be limited to flatness processing.

【0035】次に、ステータの加工工程であるが、上記
〜の工程で、加工された振動体に対し、 固着面に、圧電素子を貼り合わせ、加圧した状態で1
00℃で加熱して固着する。 圧電素子の電極面に、フレキシブルプリント板を加熱
して固着する。 振動体硬化膜の摺接面の、平面度だし加工をしてス
テータを完成する。
Next, in the processing step of the stator, a piezoelectric element is bonded to the fixed surface of the vibrating body processed in the above steps 1 to 4 and the pressure is applied to the vibrating body.
It is fixed by heating at 00 ° C. The flexible printed board is heated and fixed to the electrode surface of the piezoelectric element. The stator is completed by flattening the sliding surface of the vibrating body cured film.

【0036】以上の様にして作成したステータの摺接面
は、平面度が3μm以下、面粗さRaが0.03μm以
下と、目標とするモータの性能、精度、或は長時間寿命
のために、必要とする摺接面精度が得られる。
The sliding contact surface of the stator prepared as described above has a flatness of 3 μm or less and a surface roughness Ra of 0.03 μm or less, because of the target motor performance, accuracy, or long life. In addition, the required sliding contact surface accuracy can be obtained.

【0037】なお、振動体の〜、ステータ〜の
加工工程の後、ステータ(振動体)をビス4で、モータ
基板3に固定したあと、の工程の振動体硬化膜の摺接
面の、平面度だし加工をして、ステータを完成させても
良い。この場合、振動体2のモータ基板3に固定する際
の摺接面の平面度の狂いが除去されるので、摺接面の平
面度は更に小さくなり、その効果が期待できる。
After the vibrating body and the stator are processed, the stator (vibrating body) is fixed to the motor substrate 3 with screws 4, and then the flat surface of the sliding contact surface of the vibrating body cured film in the subsequent step is fixed. The stator may be completed by performing an embossing process. In this case, since the deviation of the flatness of the sliding contact surface when the vibrating body 2 is fixed to the motor substrate 3 is removed, the flatness of the sliding contact surface is further reduced, and the effect can be expected.

【0038】ここで、表1には、本実施例の振動波モー
タの目標性能を示し、表2には設計仕様を示す。
Here, Table 1 shows the target performance of the vibration wave motor of this embodiment, and Table 2 shows the design specifications.

【0039】[0039]

【表1】 [Table 1]

【0040】[0040]

【表2】 [Table 2]

【0041】上記の設計仕様の図1の構造の振動波モー
タに、本実施例のステータ(振動体2)を組み込んだ振
動波モータを制作し、表2の目標性能に対応して連続運
転テストをした。
A vibration wave motor in which the stator (vibration body 2) of the present embodiment is incorporated into the vibration wave motor having the structure shown in FIG. Did.

【0042】テストはモータの回転軸10の出力側にパ
ーマトルク( 商品名:工進製作所製) を連結し、回転負
荷を5Kgcmに設定し、回転軸の他端にエンコーダの
回転版を支持し、64rpm一定で制御し行なった。
In the test, a perm torque (trade name: manufactured by Kojin Seisakusho) was connected to the output side of the rotating shaft 10 of the motor, the rotating load was set to 5 kgcm, and the rotating plate of the encoder was supported at the other end of the rotating shaft. The control was performed at a constant of 64 rpm.

【0043】モータの性能を1000時間間隔で測定
し、合計3000時間の連続運転転テストをおこなっ
た。また摺接面の磨耗は、3000時間の連続運転テス
ト後に測定した。
The motor performance was measured at intervals of 1000 hours, and a continuous running test was performed for a total of 3000 hours. The wear of the sliding surface was measured after a continuous operation test for 3000 hours.

【0044】スタート時のモータ性能は、従来のモータ
と比較して、明らかに出力が大きく、また効率も高かっ
た。時間の経過の過程での性能も、全体的に大きく、出
力、効率などの変動幅も、従来例の振動体のモータより
小さかった。
The motor performance at the start was clearly higher in output and higher in efficiency than the conventional motor. The performance over the course of time was large overall, and the fluctuation range of the output, efficiency, etc. was smaller than that of the conventional vibrating body motor.

【0045】3000時間後の振動体摺接面及び移動体
摺接面の磨耗量をみると、振動体の硬化膜の平均的な磨
耗量は、0.9μmで、時間あたりの磨耗率は、0.0
003μm、一方の移動体の複合樹脂層の磨耗量は15
μmで、時間あたりの磨耗率は0.005μmで、目標
性能内であった。そして従来例の振動体のモータの振動
体摺接面及び移動体摺接面のいずれの磨耗量より小さい
ことがわかった。
Looking at the amount of wear of the vibrating body sliding contact surface and the moving body sliding contact surface after 3000 hours, the average wear amount of the cured film of the vibrating body is 0.9 μm, and the wear rate per hour is: 0.0
003 μm, and the wear amount of the composite resin layer of one of the moving bodies is 15
In μm, the wear rate per hour was 0.005 μm, which was within the target performance. Then, it was found that the amount of wear was smaller than the amount of wear of the vibrating body sliding contact surface and the moving body sliding contact surface of the motor of the conventional vibrating body.

【0046】この理由は、従来の振動体の摺接面の平面
度が6μm程度であったのに対し、本実施例の振動体で
は2μm程度と、振動体摺接面の平面度がより高精度に
仕上げられて、摺接面同士の円周方向の接触状態が大幅
に改善されているためである。
The reason for this is that the flatness of the sliding contact surface of the conventional vibrating body was about 6 μm, whereas the flatness of the sliding contact surface of the vibrating body was about 2 μm in the vibrating body of this embodiment. This is because the contact state in the circumferential direction between the sliding contact surfaces is greatly improved with the precision.

【0047】また、図4は本発明の振動波駆動装置の一
例として振動波モータを駆動源とする機器の概略図であ
る。23は大歯車23aと小歯車23bを有するギア
で、大歯車23aが振動波モータA側のギア20と噛合
している。24は被駆動部材、例えばレンズ鏡筒で、外
周部に設けられたギア24aにギア23の小歯車23b
が噛合し、モータの駆動力により回転する。一方、ギア
23にはエンコーダスリット板25が取り付けられ、ギ
ア23の回転をフォトカップラー26により検出し、例
えばオートフォーカスのためにモータの回転、停止を制
御する。
FIG. 4 is a schematic view of an apparatus using a vibration wave motor as a drive source as an example of the vibration wave driving device of the present invention. A gear 23 has a large gear 23a and a small gear 23b, and the large gear 23a meshes with the gear 20 on the vibration wave motor A side. Reference numeral 24 denotes a driven member, for example, a lens barrel, and a small gear 23b of a gear 23 is attached to a gear 24a provided on the outer peripheral portion.
Are rotated by the driving force of the motor. On the other hand, an encoder slit plate 25 is attached to the gear 23, and the rotation of the gear 23 is detected by the photocoupler 26, and the rotation and stop of the motor are controlled, for example, for autofocus.

【0048】[0048]

【発明の効果】以上説明したように、本発明の振動体或
はステータの加工工程の改善により、従来の振動体摺接
面の平面度の低下が回避され、両摺接面の円周方向の接
触状態が大幅に改善されるので、少なくともモータ性能
( 出力、効率) が向上する。また振動体摺接面に対する
移動体摺接面の単位面積当たりの加圧力が均一化される
ので、両摺接面の磨耗量の低減が可能となる。また、本
発明は上記の振動波駆動装置からなる振動波モータおよ
びそれを用いた機器を提供できる。
As described above, the improvement in the processing steps of the vibrating body or the stator according to the present invention can prevent the flatness of the conventional sliding contact surface of the vibrating body from being reduced, and the circumferential direction of both sliding contact surfaces can be avoided. At least the motor performance because the contact condition of the
(Output, efficiency) are improved. Further, since the pressing force per unit area of the moving body sliding contact surface with respect to the vibrating body sliding contact surface is made uniform, it is possible to reduce the amount of wear on both sliding contact surfaces. Further, the present invention can provide a vibration wave motor including the above-described vibration wave driving device and a device using the same.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の振動型駆動装置の例として振動波モー
タを示す断面図である。
FIG. 1 is a sectional view showing a vibration wave motor as an example of a vibration type driving device of the present invention.

【図2】図1の振動波モータを構成する振動体と移動体
の部分拡大断面図である。
FIG. 2 is a partially enlarged sectional view of a vibrating body and a moving body constituting the vibration wave motor of FIG.

【図3】振動体等で構成するステータを示す概略図であ
る。
FIG. 3 is a schematic diagram showing a stator constituted by a vibrating body and the like.

【図4】振動波モータを駆動源とする機器の概略図であ
る。
FIG. 4 is a schematic diagram of a device driven by a vibration wave motor.

【符号の説明】[Explanation of symbols]

1 圧電素子 2 振動体 3 モータ基板 5 支持体 6 複合樹脂層 7 移動体 16 フレキシブルプリント板 18 ステータ DESCRIPTION OF SYMBOLS 1 Piezoelectric element 2 Vibration body 3 Motor board 5 Support body 6 Composite resin layer 7 Moving body 16 Flexible printed board 18 Stator

Claims (15)

【特許請求の範囲】[Claims] 【請求項1】 振動体と圧電素子を有するステータを具
備し、前記圧電素子を固着する圧電素子固着面及び摺接
面を有し、振動が励起される振動体と、前記振動体の摺
接面に接触する移動体とを、相対的に摩擦駆動する振動
型駆動装置において、前記ステータが、振動体に無電解
メッキを施した後、前記圧電素子固着面に圧電素子を固
着し、該圧電素子の電極面にフレキシブルプリント板を
固着した後、前記振動体の無電解メッキ硬化膜の摺接面
を平面度だし加工をして平面に形成してなり、かつ前記
移動体の摺接面を樹脂又は樹脂組成物に少なくとも強化
材を含有させた複合樹脂層で形成してなることを特徴と
する振動型駆動装置。
1. A vibrating body, comprising a vibrating body and a stator having a piezoelectric element, having a piezoelectric element fixing surface for fixing the piezoelectric element and a sliding contact surface, wherein the vibrating body for exciting vibration is in sliding contact with the vibrating body. In a vibration type driving device that relatively frictionally drives a moving body that comes into contact with a surface, the stator applies electroless plating to the vibrating body, and then fixes a piezoelectric element to the piezoelectric element fixing surface, After the flexible printed circuit board is fixed to the electrode surface of the element, the sliding contact surface of the electroless plating cured film of the vibrator is formed into a flat surface by performing flatness processing, and the sliding contact surface of the moving body is formed. A vibration-type drive device comprising a composite resin layer containing at least a reinforcing material in a resin or a resin composition.
【請求項2】 前記無電解メッキ硬化膜の厚みが10μ
m以上である請求項1に記載の振動型駆動装置。
2. The cured electroless plating film has a thickness of 10 μm.
2. The vibration type driving device according to claim 1, wherein m is not less than m.
【請求項3】 前記無電解メッキが、無電解ニッケルメ
ッキである請求項1または請求項2に記載の振動型駆動
装置。
3. The vibration type driving device according to claim 1, wherein the electroless plating is electroless nickel plating.
【請求項4】 前記無電解メッキが、フッ素樹脂を共析
する無電解ニッケルメッキである請求項1乃至3のいず
れかの項に記載の振動型駆動装置。
4. The vibration type driving device according to claim 1, wherein the electroless plating is electroless nickel plating for eutectoidizing a fluororesin.
【請求項5】 前記無電解メッキが、三元合金の無電解
ニッケルメッキである請求項1乃至3のいずれかの項に
記載の振動型駆動装置。
5. The vibration type driving device according to claim 1, wherein said electroless plating is ternary alloy electroless nickel plating.
【請求項6】 前記無電解メッキが、360℃以下で加
熱硬化処理されている請求項1乃至5のいずれかの項に
記載の振動型駆動装置。
6. The vibration type driving device according to claim 1, wherein said electroless plating is heat-cured at 360 ° C. or lower.
【請求項7】 前記振動体の母材が、マルテンサイト系
ステンレス鋼である請求項1に記載の振動型駆動装置。
7. The vibration-type driving device according to claim 1, wherein a base material of the vibrating body is martensitic stainless steel.
【請求項8】 前記振動体の母材が、ステンレス系或い
は鉄系の焼結合金である請求項1に記載の振動型駆動装
置。
8. The vibration type driving device according to claim 1, wherein a base material of the vibrating body is a stainless steel or iron based sintered alloy.
【請求項9】 前記振動体は、機械加工の前或は後に応
力除去熱処理をおこなう請求項1、7または8に記載の
振動型駆動装置。
9. The vibration type driving device according to claim 1, wherein the vibrating body performs a stress relief heat treatment before or after machining.
【請求項10】 前記振動体の無電解メッキ硬化膜の摺
接面の平面だし加工が、研磨加工或いは研磨材を含む回
転平定盤での研削加工である請求項1に記載の振動型駆
動装置。
10. The vibration-type driving device according to claim 1, wherein the flattening process of the sliding contact surface of the electroless plating cured film of the vibrating body is a polishing process or a grinding process on a rotary flat plate containing an abrasive. .
【請求項11】 前記振動体の硬化膜の摺接面は、平面
度が5μm以下、中心線平均粗さRa(μm)が0.4
以下の平面であることを特徴とする請求項1または10
に記載の振動型駆動装置。
11. The sliding contact surface of the cured film of the vibrator has a flatness of 5 μm or less and a center line average roughness Ra (μm) of 0.4.
11. The following plane:
The vibration-type driving device according to item 1.
【請求項12】 前記移動体の複合樹脂層の摺接面は、
研磨加工或いは研磨剤を含む回転平定盤で研削加工さ
れ、平面或いはテーパ面の摺接面に形成される請求項1
に記載の振動型駆動装置。
12. The sliding surface of the composite resin layer of the moving body,
2. A grinding process or a grinding process with a rotary platen containing an abrasive to form a flat or tapered sliding surface.
The vibration-type driving device according to item 1.
【請求項13】 圧電素子固着面及び摺接面を有し、振
動が励起される振動体と、この振動体の前記摺接面に接
触する移動体とを、相対的に摩擦駆動する振動型駆動装
置において、前記振動体は無電解メッキを施工したあ
と、前記振動体固着面に圧電素子を固着し、該圧電素子
の電極面にフレキシブルプリント板を固着してステータ
を形成し、前記ステータをモータ基板に固定したあと、
前記振動体の無電解メッキの硬化膜の摺接面を平面度だ
し加工をして摺接面を平面のステータとしたことを特徴
とする振動型駆動装置。
13. A vibration type having a piezoelectric element fixing surface and a sliding contact surface, wherein a vibrating body that is excited to vibrate and a moving body that comes into contact with the sliding contact surface of the vibrating body are relatively driven by friction. In the driving device, after the vibrating body is subjected to electroless plating, a piezoelectric element is fixed to the vibrating body fixing surface, a flexible printed board is fixed to an electrode surface of the piezoelectric element to form a stator, and the stator is formed. After fixing to the motor board,
A vibration-type driving device, wherein a sliding contact surface of a cured film of the electroless plating of the vibrator is flattened to form a flat stator.
【請求項14】 請求項1乃至13のいずれかの項に記
載の振動波駆動装置からなることを特徴とする振動波モ
ータ。
14. A vibration wave motor comprising the vibration wave drive device according to claim 1. Description:
【請求項15】 請求項1乃至13のいずれかの項に記
載の振動波駆動装置を駆動源として設けたことを特徴と
する機器。
15. An apparatus provided with the vibration wave drive device according to claim 1 as a drive source.
JP10337019A 1998-11-27 1998-11-27 Vibration-type driving device and equipment therewith Pending JP2000166266A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10337019A JP2000166266A (en) 1998-11-27 1998-11-27 Vibration-type driving device and equipment therewith

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10337019A JP2000166266A (en) 1998-11-27 1998-11-27 Vibration-type driving device and equipment therewith

Publications (1)

Publication Number Publication Date
JP2000166266A true JP2000166266A (en) 2000-06-16

Family

ID=18304707

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10337019A Pending JP2000166266A (en) 1998-11-27 1998-11-27 Vibration-type driving device and equipment therewith

Country Status (1)

Country Link
JP (1) JP2000166266A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005333700A (en) * 2004-05-18 2005-12-02 Nikon Corp Vibration actuator and its manufacturing process
JP2020068595A (en) * 2018-10-24 2020-04-30 キヤノン株式会社 Vibration type actuator, contact body, and method for manufacturing the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005333700A (en) * 2004-05-18 2005-12-02 Nikon Corp Vibration actuator and its manufacturing process
JP4572578B2 (en) * 2004-05-18 2010-11-04 株式会社ニコン Vibration actuator and manufacturing method thereof
JP2020068595A (en) * 2018-10-24 2020-04-30 キヤノン株式会社 Vibration type actuator, contact body, and method for manufacturing the same
JP7110060B2 (en) 2018-10-24 2022-08-01 キヤノン株式会社 Vibration type actuator, contact body and manufacturing method thereof

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