JPS6051478A - Electronic timepiece - Google Patents

Electronic timepiece

Info

Publication number
JPS6051478A
JPS6051478A JP58156149A JP15614983A JPS6051478A JP S6051478 A JPS6051478 A JP S6051478A JP 58156149 A JP58156149 A JP 58156149A JP 15614983 A JP15614983 A JP 15614983A JP S6051478 A JPS6051478 A JP S6051478A
Authority
JP
Japan
Prior art keywords
rotor
circuit
motor
electronic timepiece
signal
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.)
Granted
Application number
JP58156149A
Other languages
Japanese (ja)
Other versions
JPH0522476B2 (en
Inventor
Shuji Otawa
脩二 大多和
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.)
Seiko Instruments Inc
Original Assignee
Seiko Instruments 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 Seiko Instruments Inc filed Critical Seiko Instruments Inc
Priority to JP58156149A priority Critical patent/JPS6051478A/en
Publication of JPS6051478A publication Critical patent/JPS6051478A/en
Publication of JPH0522476B2 publication Critical patent/JPH0522476B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
    • H02N2/10—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing rotary motion, e.g. rotary motors
    • H02N2/14—Drive circuits; Control arrangements or methods
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
    • H02N2/10—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing rotary motion, e.g. rotary motors
    • H02N2/16—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing rotary motion, e.g. rotary motors using travelling waves, i.e. Rayleigh surface waves
    • H02N2/166—Motors with disc stator

Landscapes

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

Abstract

PURPOSE:To enable to display an accurate time by etching a pattern of 60-divisions of an electronic timepiece made of a piezoelectric motor, thereby detecting the rotating state and controlling to drive the motor. CONSTITUTION:An electronic timepiece is composed of a rotor 1 for driving an hour hand 12 and a minute hand 13, an elastic ring 2, a piezoelectric element 3 for bending and vibrating, and a support 4 having a spring property. A 60-division pattern is etched on the upper surface of the rotor 1, a spring 14 is contacted to enable to detect the rotating state. A motor drive circuit 23 is operated by an oscillator 20, a frequency divider 21 and a waveform shaper 22, the fact that the rotor 1 is rotated at the prescribed angle by a signal from a spring 14 is detected by a detector 24, the rotation is stopped by a controller 24, and the rotation is again started by a signal of next 1min period. Accordingly, the time can be accurately displayed.

Description

【発明の詳細な説明】 本発明は、圧電モータを用いたアナログ式電子時計のモ
ータ駆動方式に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a motor drive system for an analog electronic timepiece using a piezoelectric motor.

圧電モータは、圧電セラミック、圧電結晶体等の材料か
らなる振動子を利用し、振動子に電圧をかけた時に生ず
る伸縮力によって駆動出力部材を重線運動又は（ロ）転
運動させて、その機械的出力を発生させるものである。A piezoelectric motor uses a vibrator made of a material such as a piezoelectric ceramic or a piezoelectric crystal, and uses the expansion and contraction force generated when a voltage is applied to the vibrator to cause a drive output member to perform heavy linear motion or rotational motion. It generates mechanical output.

電子時計の駆動源としては回転運動が好ましく第１図の
様な構成が考えられる。機械的出力をとり出すｐ−夕１
と接する弾性リング２、その弾性リング２を屈曲振動さ
せる為に、弾性リング２にはりつけられた圧電素子３及
び圧電素子−に接し、ロータ、ＩＪｌｌＩ性リング、圧
電素子−を支持する。バネ性をもった支持体４、支持体
４を支え、かつ、ロータ１にｔｌも込み固定δれ−ｆｒ
−ｃＩ−タ真７のラジアル方向軸受となる地板５、ロー
タ＾７の他端の受となるロータ受６からなる。Rotary motion is preferable as a driving source for an electronic timepiece, and a configuration as shown in FIG. 1 can be considered. P-1 to extract mechanical output
The elastic ring 2 contacts the piezoelectric element 3 and the piezoelectric element attached to the elastic ring 2 in order to bend and vibrate the elastic ring 2, and supports the rotor, the IJllI ring, and the piezoelectric element. A supporting body 4 with spring properties, supporting the supporting body 4, and fixing the rotor 1 with tl δre-fr
-cI- It consists of a base plate 5 which serves as a radial direction bearing for the rotor stem 7, and a rotor bearing 6 which serves as a support for the other end of the rotor ^7.

第１図のロータが回転する原理を第２図、第３図面の簡
単な説明する。第２図−（ａ）の様に弾性リング２に圧
電素子３を貼りつけ、圧電素子に′電圧をかけると圧電
素子は伸縮をくり返し、第２図−（＝、第２図（ｃ）の
様に弾性体が波うつ状態になる。The principle of rotation of the rotor shown in FIG. 1 will be briefly explained with reference to FIGS. 2 and 3. When the piezoelectric element 3 is attached to the elastic ring 2 as shown in Fig. 2 (a) and a voltage is applied to the piezoelectric element, the piezoelectric element repeats expansion and contraction. The elastic body becomes undulating.

ロータ會回転させる為には、弾性体の波を一方向にだけ
伝搬する必要がある。そこで圧電素子を第３図に示す状
態で貼る。第２図において、Ｘ方向と−Ｘ方向に伝わる
波を計算する。Ｘ方向の波Ｆ””Ａａｌｎ（ｗｔ＋α）
　Ａｃｏｓ（Ｗｔ＋α十−λ）ここで　λ＝２πと考え
ると Ｆ’Ｘ＝ＡＣＯ５（Ｗｔ＋α）　Ａ（ｃｏｓ（ｗｔ＋α
）は「π一山（ｗｔ十α）龜ｉπ） ＝Ａｓｆｎ（ｗｔ＋α）　Ａｓｌｎ（ｗｔ＋α）；〇 一万、−Ｘ方向の波は Ｆ−Ｘ＝Ａｍ（ｗｔ＋α）　Ａｃｏｓ（ｗｔ＋α２π）
＝　２　ＡＩ！１ｆｉ（ｗ　を十”　）この結果、波は
−Ｘ方向にしか進まない。In order to rotate the rotor, it is necessary to propagate waves in the elastic body in only one direction. Therefore, the piezoelectric element is pasted in the state shown in FIG. In Figure 2, waves propagating in the X direction and -X direction are calculated. Wave in the X direction F””Aaln (wt+α)
Acos (Wt + α + λ) Here, considering λ = 2π, F'X = ACO5 (Wt + α) A (cos (wt + α
) is "π one peak (wt ten α) 龜iπ) = Asfn (wt + α) Asln (wt + α); 〇10,000, the wave in the -X direction is F-X = Am (wt + α) Acos (wt + α2π)
= 2 AI! 1fi (w = 10'') As a result, the wave only travels in the -X direction.

この原理に基づき弾性リングに進行波が出来る様に順次
Ｉ＋：電累子素子りつける。弾性リングとロータは接し
ているため、摩擦があり、この摩擦力により進行波と逆
方向に駆動される。Based on this principle, I+: electron accumulator elements are sequentially attached to the elastic ring so that a traveling wave is generated. Since the elastic ring and rotor are in contact with each other, there is friction, and this frictional force drives the rotor in the opposite direction to the traveling wave.

しかし、この圧′ｔ’ｑ、モータは、弾性リング表面と
ロータの浅面の摩擦により駆動される為、各々の表面の
状態により回転速度が変わる欠点がある。However, since this pressure 't'q and the motor are driven by friction between the surface of the elastic ring and the shallow surface of the rotor, there is a drawback that the rotational speed changes depending on the condition of each surface.

又、圧電素子にかける市川により回転速度が変わる特徴
がある。時刻を正確に表示する電子時計の動力源として
考えた場合、的１転速度が−ずでない事は大きな欠点と
なる。Also, the rotation speed is changed by the amount applied to the piezoelectric element. When considered as a power source for electronic watches that accurately display the time, the fact that the target rotation speed is not accurate is a major drawback.

本発明は上記の欠点全除去する様に構成されたもので、
駆動出力部の］ｎ１転状態を検出し、制御回路により回
転制御する圧電モータを用いに電子時計を提供するもの
である。The present invention is designed to eliminate all of the above drawbacks.
This invention provides an electronic timepiece using a piezoelectric motor that detects the n1 rotation state of a drive output section and controls its rotation by a control circuit.

け下実施例に基づき本発明の詳細な説明する。The present invention will be explained in detail based on the following examples.

第４図は、２釣用電子時Ｉ［の駆動部１輪列都、指示部
を示す、ロータ１゜弾性リング２．圧電素子３、バネ性
のある支持体４．地板５．カナ７ａを有するロータ貢７
．ロータカナと噛み合う日ソ義軍０日）裏車のカナ部ａ
ａ　と噛み合う筒車８１日ノ裏車の軸を受ける日ノ裏受
１５９日ノ裏押工１６゜筒車には時刻を表示する時針１
２．ロータ真には分銅１３がとシ付けられている。文字
板１１は、筒車を介してロータ真の軸受ともなっている
。回転検出バネ１４は、ロータ上面を押している。ロー
タ上面には、第５図に示す様な６０分割ツバターンがエ
ツチングされている。ロータの材質はプラスチックであ
り、プラスチックの上に金属パターン１６が形成されて
いる。金属パターンの中心部は、金属ロータのカナ部と
圧着されており、ロータ真、及び各−列車、軸受部が金
属となっている為、地板と同電位となっている。地板に
は電池のプラス電圧ＶＤＤが接続されるので、ロータが
回転すると、回転検出バネは間欠的にＶＤＤとなる。そ
こで圧電モータを通常の運釦速度より十分早く回転させ
ておき、回転検出バネよりＶＤＤが検出されたなら、運
鉛ヲストツグし、次の正１分の分周出力で又圧電モータ
が回転する様にする。FIG. 4 shows the drive section of the two fishing electronics, one wheel train and the indicating section, the rotor 1 degree elastic ring 2. Piezoelectric element 3, springy support 4. Main plate 5. Rotor tribute 7 with kana 7a
．． Japanese and Soviet Union forces engaging with rota kana 0th) Kana part a of the back car
The hour wheel meshing with the 81st hour wheel has a 159th hour back pusher that receives the shaft of the 16° hour wheel.The hour wheel 1 displays the time.
2. A weight 13 is attached to the rotor stem. The dial plate 11 also serves as a bearing for the rotor shaft via the hour wheel. The rotation detection spring 14 pushes the top surface of the rotor. The upper surface of the rotor is etched with a 60-segment rib pattern as shown in FIG. The material of the rotor is plastic, and a metal pattern 16 is formed on the plastic. The center of the metal pattern is crimped to the pinion part of the metal rotor, and since the rotor stem, each train, and the bearing part are made of metal, they have the same potential as the ground plate. Since the positive voltage VDD of the battery is connected to the ground plate, when the rotor rotates, the rotation detection spring intermittently becomes VDD. Therefore, the piezoelectric motor is rotated sufficiently faster than the normal button operation speed, and when VDD is detected from the rotation detection spring, the lead is stopped and the piezoelectric motor is rotated again with the next positive 1 minute divided output. Make it.

第６図は、本発明のブロック図である。時間基　５　− 単信号を発生する発振回路２０．発振回路の信号を分周
する分周回路２１９分周回路からの信号を受けモータ駆
動回路２５に必要なパルス幅変調信号をおぐる波形成形
回路２２．ロータが回転する事により回転検出バネにＶ
ＤＤ信号が得られたら、ロータが一定角度だけ回転した
と検出する回転検出回路２４０回転検出回路の信号を受
け、回転を制御する制御回路２５から構成される。制御
回路は、分周回路からの信号を受け、１分間に６°だけ
、ロータが回転する様にし、波形成形回路を通し、モー
タ駆動回路を動作させる。ロータが回転さね、ロータに
６０分割されたパターンから、回転検出バネにＶＤＤが
検出されたなら、ロータの回転を止める。次に分周回路
から１分周期の信号金堂けたなら、再びロータが回転し
、次のパターンに回転検出バネが接触するまで回転する
。次のパターンに回転検出バネが接触する途中において
、パターン幅だけＶＤＤが続くが、この間の処理は、電
圧検出等で論理的Ｋｌｖｉ牟に処理出来るので、ここで
は詳細な説明は省く、第４図では、回転検出　６　− バネという、機械的接点を用いた例であるが、他に、ロ
ータ外周にマグネットヲ使い、磁気検出をする回転検出
方法や、ロータ外周ヲ＜シ歯状にし、電極を貼り、はり
つけ、静電容量全検出する方法もある。FIG. 6 is a block diagram of the present invention. Time base 5 - oscillator circuit 20 for generating a single signal. A frequency dividing circuit 219 that divides the frequency of the signal from the oscillation circuit; a waveform shaping circuit 22 that receives the signal from the frequency dividing circuit and generates a pulse width modulation signal necessary for the motor drive circuit 25; When the rotor rotates, the rotation detection spring
When the DD signal is obtained, the rotation detection circuit 240 detects that the rotor has rotated by a certain angle, and the control circuit 25 receives the signal from the rotation detection circuit and controls the rotation. The control circuit receives the signal from the frequency dividing circuit, causes the rotor to rotate by 6 degrees per minute, and operates the motor drive circuit through the waveform shaping circuit. When the rotor rotates and VDD is detected in the rotation detection spring from the pattern divided into 60 parts by the rotor, the rotation of the rotor is stopped. Next, when a signal with a period of one minute is received from the frequency dividing circuit, the rotor rotates again until the rotation detection spring contacts the next pattern. On the way that the rotation detection spring contacts the next pattern, VDD continues for the width of the pattern, but the process during this time can be processed logically by voltage detection, etc., so a detailed explanation will be omitted here. This is an example of using a mechanical contact called a rotation detection spring, but there are also other rotation detection methods that use magnets on the outer circumference of the rotor to perform magnetic detection, or a rotation detection method in which the outer circumference of the rotor is shaped like teeth and electrodes are used. There are also methods of pasting, gluing, and detecting all capacitance.

本発明によれば、圧電モータを用いて、正確に時刻を表
示出来る為、圧電モータを用いて■　従来の電磁型モー
タに比べて高効率なモータが出来る。（変換効率が高い
為） ■　輪列等の部品点数を削減出来る為、時計のコストダ
ウンが出来る。According to the present invention, since the time can be displayed accurately using a piezoelectric motor, a piezoelectric motor can be used to create a motor that is more efficient than conventional electromagnetic motors. (Due to high conversion efficiency) ■ The number of parts such as wheel trains can be reduced, reducing the cost of watches.

■　薄型な時計が出来る。■ A thin watch can be made.

等の諸効果を有する。It has various effects such as.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は、回転運動をする圧電モータの断面図の一例で
ある。 第２図は、圧電素子による弾性体の振動状態図である。 第３図は、圧電モータの回転原理図の一例であ　７− る。 第４図、本発明による、駆動部１輪列部、指示部の断面
図の一例である。 第５図、ロータ上面のパターン図。 第６図、本発明のブロック図である。 １・・・ロータ　２・・・弾性リング ３・・・圧電素子　４・・・支持体 ５・・・地　板　６・・・ロータ受 ７・・・ロータ真　７ａ・・・ロータカナ部８・・・筒
　車　９・・・日ノ裏車 ９ａ・・・日ノ憂カナ　１０・・・Ｈノ裏理工１１・・
・文字板　１２・・・時　ｆ１１１３・・・分　釦　１
４・・・回転検出バネ１５・・・Ｂ／Ｊｉ［−ｉ６・・
・パターン２０・・・発振回路　２１・・・分周回路２
２・・・波形成形回路　２３・・・モータ駆動回路２４
・・・回転検出回路　２５・・・制御回路以　上 出願人　株式会社　第二梢工舎 ４８FIG. 1 is an example of a cross-sectional view of a piezoelectric motor that performs rotational motion. FIG. 2 is a diagram showing the state of vibration of an elastic body caused by a piezoelectric element. FIG. 3 is an example of a diagram of the principle of rotation of a piezoelectric motor. FIG. 4 is an example of a sectional view of the drive unit 1 wheel train section and the indicator section according to the present invention. FIG. 5 is a pattern diagram of the upper surface of the rotor. FIG. 6 is a block diagram of the present invention. 1... Rotor 2... Elastic ring 3... Piezoelectric element 4... Support body 5... Base plate 6... Rotor support 7... Rotor stem 7a... Rotor pinion part 8...・Tsutsu car 9...Hi no Ura car 9a...Hino Ura kana 10...H no Ura Riko 11...
・Dial 12...hour f1113...minute button 1
4...Rotation detection spring 15...B/Ji [-i6...
・Pattern 20... Oscillation circuit 21... Frequency divider circuit 2
2... Waveform shaping circuit 23... Motor drive circuit 24
... Rotation detection circuit 25 ... Control circuit and above Applicant Daini Kozue Kosha Co., Ltd. 48

Claims (1)

【特許請求の範囲】 （１）　発振回路１分周回路。波形成形回路。モータ駆
動回路。圧電モータよりなる電子時計忙おいて、前記、
圧電モータの回転状態を検出する回転検出回路を設け、
前記回転検出回路からの信号及び、分周回路の信号に応
じて、モータの駆動制御する制御回路を有する電子時計
。 （２、特許請求の範囲第１項において、制御回路の出力
により前記圧電モータが間欠的に駆動される事を特徴と
する電子時計。 （３）　特許請求の範囲第１項、第２項において、２鉗
表示時計である事を特徴とする電子時計。 （４）　特許請求の範囲第３項において、分銅がロータ
軸に取りつけられている事を特徴とする電子時計。 （５）特許請求の範囲第３項において、文字板がロータ
の軸受を兼ねている事を％敵とする電子時＃［。[Claims] (1) Oscillation circuit 1 frequency divider circuit. Waveform shaping circuit. Motor drive circuit. Regarding the electronic clock consisting of a piezoelectric motor, the above-mentioned
A rotation detection circuit is installed to detect the rotation state of the piezoelectric motor.
An electronic timepiece comprising a control circuit that controls driving of a motor according to a signal from the rotation detection circuit and a signal from the frequency dividing circuit. (2. An electronic timepiece according to claim 1, characterized in that the piezoelectric motor is intermittently driven by the output of a control circuit. (3) In claim 1 and 2. , an electronic timepiece characterized by being a two-prong display timepiece. (4) An electronic timepiece according to claim 3, characterized in that a weight is attached to a rotor shaft. In the third term of the range, electronic time #[.
JP58156149A 1983-08-26 1983-08-26 Electronic timepiece Granted JPS6051478A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58156149A JPS6051478A (en) 1983-08-26 1983-08-26 Electronic timepiece

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58156149A JPS6051478A (en) 1983-08-26 1983-08-26 Electronic timepiece

Related Child Applications (2)

Application Number Title Priority Date Filing Date
JP4280325A Division JP2694313B2 (en) 1992-10-19 1992-10-19 Electronic equipment using ultrasonic motor
JP7293145A Division JPH08214568A (en) 1995-11-10 1995-11-10 Ultrasonic motor

Publications (2)

Publication Number Publication Date
JPS6051478A true JPS6051478A (en) 1985-03-22
JPH0522476B2 JPH0522476B2 (en) 1993-03-29

Family

ID=15621405

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58156149A Granted JPS6051478A (en) 1983-08-26 1983-08-26 Electronic timepiece

Country Status (1)

Country Link
JP (1) JPS6051478A (en)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60176470A (en) * 1984-02-21 1985-09-10 Canon Inc Drive system of vibration wave motor
JPS62145185A (en) * 1985-12-19 1987-06-29 Seiko Epson Corp Pointer type electronic timepiece
JPS63274379A (en) * 1987-05-01 1988-11-11 Olympus Optical Co Ltd Ultrasonic wave motor
JPS63300995A (en) * 1987-05-30 1988-12-08 日本精機株式会社 Ultrasonic motor driven type indicator
EP0299771A2 (en) * 1987-07-15 1989-01-18 Seiko Instruments Inc. Wave motor driving circuit
JPS6475989A (en) * 1987-09-18 1989-03-22 Hitachi Maxell Timepiece using ultrasonic motor
JPH0187287U (en) * 1987-12-02 1989-06-08
JPH01260391A (en) * 1988-04-12 1989-10-17 Hitachi Maxell Ltd Seethrough clock
EP0495665A1 (en) 1991-01-17 1992-07-22 Seiko Epson Corporation Ultrasonic stepping motor
US5229678A (en) * 1989-10-20 1993-07-20 Seiko Epson Corporation Drive control unit for an ultrasonic step motor
US5247220A (en) * 1989-10-20 1993-09-21 Seiko Epson Corporation Ultrasonic motor
EP0562817A2 (en) * 1992-03-24 1993-09-29 Seiko Instruments Inc. Electronic apparatus with ultrasonic motor
US5473215A (en) * 1993-09-08 1995-12-05 Asulab S.A. Position detector of the rotor of a piezo-electric motor
US5479380A (en) * 1989-10-20 1995-12-26 Seiko Epson Corporation Ultrasonic motor for driving an analog electronic watch
EP0874292A2 (en) * 1997-04-25 1998-10-28 Seiko Instruments Inc. Electronic timepiece
CN111623809A (en) * 2020-06-05 2020-09-04 鹤岗市振金石墨烯新材料研究院 Motor shaft sensor based on graphene coating

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002071840A (en) * 2000-08-29 2002-03-12 Seiko Instruments Inc Electronic apparatus

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JPS60176470A (en) * 1984-02-21 1985-09-10 Canon Inc Drive system of vibration wave motor
JPH0515155B2 (en) * 1984-02-21 1993-02-26 Canon Kk
JPS62145185A (en) * 1985-12-19 1987-06-29 Seiko Epson Corp Pointer type electronic timepiece
JPH0743428B2 (en) * 1985-12-19 1995-05-15 セイコーエプソン株式会社 Pointer type electronic clock
JPS63274379A (en) * 1987-05-01 1988-11-11 Olympus Optical Co Ltd Ultrasonic wave motor
JPS63300995A (en) * 1987-05-30 1988-12-08 日本精機株式会社 Ultrasonic motor driven type indicator
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JPS6475989A (en) * 1987-09-18 1989-03-22 Hitachi Maxell Timepiece using ultrasonic motor
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EP0874292A3 (en) * 1997-04-25 1999-03-03 Seiko Instruments Inc. Electronic timepiece
CN111623809A (en) * 2020-06-05 2020-09-04 鹤岗市振金石墨烯新材料研究院 Motor shaft sensor based on graphene coating
CN111623809B (en) * 2020-06-05 2022-03-18 鹤岗市振金石墨烯新材料研究院 Motor shaft sensor based on graphene coating

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