JPH0431833Y2 - - Google Patents
Info
- Publication number
- JPH0431833Y2 JPH0431833Y2 JP1986076979U JP7697986U JPH0431833Y2 JP H0431833 Y2 JPH0431833 Y2 JP H0431833Y2 JP 1986076979 U JP1986076979 U JP 1986076979U JP 7697986 U JP7697986 U JP 7697986U JP H0431833 Y2 JPH0431833 Y2 JP H0431833Y2
- Authority
- JP
- Japan
- Prior art keywords
- rotor
- vibrator
- pin
- gear
- row
- 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.)
- Expired
Links
- 210000000078 claw Anatomy 0.000 description 6
- 230000002265 prevention Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
Landscapes
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Description
【考案の詳細な説明】
［考案の技術分野］
この考案は圧電素子により振動される振動子に
より指針を駆動する時計に関するものである。[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a timepiece whose hands are driven by a vibrator vibrated by a piezoelectric element.
［従来技術とその問題点］
従来、電子腕時計にはモータとして２極ステツ
プモータが用いられている。この２極ステツプモ
ータは、コイルが巻かれた磁心と、この磁心に連
結された一対のステータと、この一対のステータ
の間に配置され、２極に着磁されたロータとを有
し、磁心のコイルに所定周期の反転パルスを供給
して、ステータにＮ，Ｓの磁極を交互に発生さ
せ、コイルに１パルス供給する毎にロータを180
℃づつ回転させるようになつている。しかしなが
ら、磁気を利用しているために構成が複雑になる
ばかりか、駆動制御も複雑で精度が要求されてる
ものであつた。[Prior art and its problems] Conventionally, electronic wristwatches have used a two-pole step motor as a motor. This two-pole step motor has a magnetic core around which a coil is wound, a pair of stators connected to this magnetic core, and a two-pole magnetized rotor placed between the pair of stators. By supplying reversal pulses with a predetermined period to the coil, N and S magnetic poles are alternately generated in the stator, and each time one pulse is supplied to the coil, the rotor is rotated 180 degrees.
It is designed to rotate in degrees Celsius. However, since magnetism is used, the structure is not only complicated, but also the drive control is complicated and requires precision.
そこで、例えば実開昭51−65858号公報に記載
されているように、圧電素子が貼り合わされた構
造のバイモルフの往復運動によつてラチエツトの
爪歯車を回転させ、この回転により指針を駆動し
て時刻を表示することが考えられている。しかし
ながら、このようなバイモルフの往復動によつて
爪歯車を回転させる場合には、バイモルフが一方
向に振動して爪歯車を回転した後に反対方向に戻
る時にバイモルフが爪歯車に当り、爪歯車を逆回
転するおそれがある。そこでバイモルフが反対方
向に振動した時に爪歯車が逆転しないように、固
定板バネと戻り阻止用ギヤとからなる逆回転防止
機構を必要とし、構造が複雑になるばかりか、爪
歯車を回転するじに固定バネを弾性変形しなけれ
ばならないために振動子の駆動力を大きくしなけ
ればならず、圧電素子として大きいものを用いる
必要があるので装置全体がおおきくなり、しかも
消費電力も大きくなる欠点がある。 For example, as described in Japanese Utility Model Application No. 51-65858, a ratchet pawl gear is rotated by the reciprocating motion of a bimorph having a structure in which piezoelectric elements are bonded together, and this rotation drives the pointer. The idea is to display the time. However, when the claw gear is rotated by such reciprocating motion of the bimorph, the bimorph vibrates in one direction to rotate the claw gear and then returns to the opposite direction when the bimorph hits the claw gear, causing the claw gear to rotate. There is a risk of reverse rotation. Therefore, in order to prevent the claw gear from reversing when the bimorph vibrates in the opposite direction, a reverse rotation prevention mechanism consisting of a fixed plate spring and a return prevention gear is required, which not only complicates the structure but also prevents the claw gear from rotating. Since the fixing spring must be elastically deformed, the driving force of the vibrator must be increased, and a large piezoelectric element must be used, which increases the overall size of the device and increases power consumption. be.
［考案の目的］
この上記のような事情に鑑みてなされたもの
で、その目的とするところは、構成が簡単で、小
型化が可能で、しかも消費電力も少ない時計を提
供することにある。[Purpose of the invention] This invention was made in view of the above-mentioned circumstances, and its purpose is to provide a watch that has a simple configuration, can be downsized, and consumes less power.
［考案の要点］
この考案は上記のような目的を達成するため
に、振動子１と、指針１８を運針するための歯車
ロータ７とを備え、振動子１を先端にピン４が取
付けられ長手方向に沿う４つの面夫々に圧電素子
３ａ，３ｂ，３ｃ，３ｄが配置された角柱状の弾
性体２で構成し、歯車ロータ７をロータ軸８とこ
のロータ軸８に固定され端部に軸方向に突出する
鋸歯状溝列が形成された円板９とで構成し、振動
子１のピン４を円板９の鋸歯状溝列に係合して、
弾性体２の４つの圧電素子３ａ，３ｂ，３ｃ，３
ｄに位相が90℃づつずれた駆動信号を供給するこ
とによりピン４を角状運動して、このピン４の角
状運動により鋸歯状溝列を移動させて歯車ロータ
７を回転させ、指針１８を運針するようにしたも
のである。[Points of the invention] In order to achieve the above-mentioned purpose, this invention is equipped with a vibrator 1 and a geared rotor 7 for moving the pointer 18, and a pin 4 is attached to the tip of the vibrator 1, and the pin 4 is attached to the tip of the vibrator 1. It is composed of a prismatic elastic body 2 in which piezoelectric elements 3a, 3b, 3c, and 3d are arranged on each of four surfaces along the direction, and a gear rotor 7 is fixed to a rotor shaft 8 and a shaft is attached to the end. The pin 4 of the vibrator 1 is engaged with the sawtooth groove row of the disk 9,
Four piezoelectric elements 3a, 3b, 3c, 3 of elastic body 2
The pin 4 is moved in an angular manner by supplying a drive signal whose phase is shifted by 90 degrees to It is designed to move the hands.
［実施例］
以下図によつてその構造及び作用を説明する。
第１図は本考案の第１実施例の原理図であつて、
振動子１は角柱状の弾性体２の各表面に圧電素子
３ａ，３ｂ，３ｃ，３ｄ（それぞれの電極も含む）
を張り付けたもの（第２図参照）で、夫々に電圧
を印加すると長手方向に伸び、逆電圧をかけると
縮むようになつている。例えば圧電素子３ａに正
電圧をかけ圧電素子３ｃに逆電圧をかけると、弾
性体２は５ｃの方向へ撓む。以下同様にして弾性
体２は５ａ，５ｂ，５ｃ，５ｄの何れの方向へも
撓ませることができる。この弾性体２の先端にピ
ン４を取り付け、ピン４の先端部に係合するよう
に歯車ロータ７を設ける。歯車ロータ７はロータ
軸８を中心とする円板９の端面に鋸歯状溝列を設
けたもので、ロータ軸８を中心に回転するように
なつている。そして前記鋸歯状溝列には弾性体２
の先端に取り付けられたピン４が係合されている
ので、歯車ロータ７に振動子１が係合されている
状態となる。このような構造で振動子１の一端を
絶縁座１０に固定し、圧電素子３ａ，３ｂ，３
ｃ，３ｄに夫々第３図のａ，ｂ，ｃ，ｄで示すよ
うな電圧を交番的に印加すると、ａの逆電圧は圧
電素子３ａに、ｃの正電圧は圧電素子３ｃに印加
されて振動子１は５ａ方向に撓み、ピン４は歯車
ロータ４の鋸歯状溝列から上方にあがる。次にｂ
の正電圧が圧電素子３ｂに、ｄの負電圧が圧電素
子３ｄに印加されて、振動子１は５ｄの方向に撓
み、ピン４は鋸歯状溝列の１山を越える。次にａ
の正電圧が圧電素子３ａに、ｃの負電圧が圧電素
子３ｃに印加され振動子１は５ｃの方向に撓み、
ピン４は鋸歯状溝列の次の谷に入る。次にｂの負
電圧が圧電素子３ｂに、ｄの正電圧が圧電素子３
ｄに印加され振動子１は５ｄの方向に撓み、ピン
４は鋸歯状溝列を左方向に移動させることができ
る。これを１サイクルとすると、１サイクルは、
第１図の６ａで示したように歯車ロータ７を１ピ
ツチだけ歩進させたものとなる。この逆を行なう
ことにより振動子１の運動は逆方向の点線で示し
た６ｂのようになつて歯車ロータ７を反時計方向
に１ピツチだけ歩進させることができる。[Example] The structure and operation will be explained below with reference to the figures.
FIG. 1 is a principle diagram of the first embodiment of the present invention,
The vibrator 1 has piezoelectric elements 3a, 3b, 3c, and 3d (including their respective electrodes) on each surface of a prismatic elastic body 2.
(see Figure 2), which expands in the longitudinal direction when a voltage is applied to each one, and contracts when a reverse voltage is applied to each. For example, when a positive voltage is applied to the piezoelectric element 3a and a reverse voltage is applied to the piezoelectric element 3c, the elastic body 2 bends in the direction of 5c. Similarly, the elastic body 2 can be bent in any of the directions 5a, 5b, 5c, and 5d. A pin 4 is attached to the tip of this elastic body 2, and a gear rotor 7 is provided so as to engage with the tip of the pin 4. The gear rotor 7 is formed by providing a row of sawtooth grooves on the end face of a disk 9 centered on a rotor shaft 8, and is adapted to rotate around the rotor shaft 8. And an elastic body 2 is provided in the row of sawtooth grooves.
Since the pin 4 attached to the tip of the gear rotor 7 is engaged, the vibrator 1 is engaged with the gear rotor 7. With this structure, one end of the vibrator 1 is fixed to the insulating seat 10, and the piezoelectric elements 3a, 3b, 3
When voltages shown as a, b, c, and d in FIG. 3 are applied alternately to c and 3d, respectively, the reverse voltage of a is applied to the piezoelectric element 3a, and the positive voltage of c is applied to the piezoelectric element 3c. The vibrator 1 is deflected in the direction 5a, and the pin 4 rises upward from the serrated groove row of the gear rotor 4. Then b
A positive voltage of d is applied to the piezoelectric element 3b and a negative voltage of d is applied to the piezoelectric element 3d, so that the vibrator 1 is deflected in the direction of 5d, and the pin 4 exceeds one peak of the row of sawtooth grooves. Then a
A positive voltage of c is applied to the piezoelectric element 3a, a negative voltage of c is applied to the piezoelectric element 3c, and the vibrator 1 is deflected in the direction of 5c.
Pin 4 enters the next valley in the series of serrations. Next, the negative voltage b is applied to the piezoelectric element 3b, and the positive voltage d is applied to the piezoelectric element 3b.
d, the vibrator 1 is deflected in the direction 5d, and the pin 4 can move the row of sawtooth grooves to the left. If this is one cycle, one cycle is
As shown by 6a in FIG. 1, the gear rotor 7 is stepped by one pitch. By doing the opposite, the movement of the vibrator 1 becomes as shown by the dotted line 6b in the opposite direction, and the gear rotor 7 can be moved counterclockwise by one pitch.
このように角柱状の弾性体２の各表面に圧電素
子３ａ，３ｂ，３ｃ，３ｄを粘着け、弾性体２の
先端にピン４を取付けて振動子１とし、該振動子
１のピン４に歯車ロータ４の鋸歯状溝列を係合さ
せた時計用モータにおいて、歯車ロータ４の鋸歯
を60山とし振動子１の振動を１分間に１サイクル
で行なえば、歯車ロータは１分間に１歩進し、１
時間で１回転する時計用モータのロータとして使
用することができる。 In this way, the piezoelectric elements 3a, 3b, 3c, and 3d are adhered to each surface of the prismatic elastic body 2, and the pin 4 is attached to the tip of the elastic body 2 to form the vibrator 1. In a watch motor in which the serrated groove rows of the gear rotor 4 are engaged, if the gear rotor 4 has 60 saw teeth and the vibrator 1 vibrates at one cycle per minute, the gear rotor will take one step per minute. Advance, 1
It can be used as a rotor for a watch motor that rotates once per hour.
第４図に前記の時計用モータを用いた時計の一
実施例を示す。図において振動子１は弾性体２、
圧電素子３、ピン４で構成され、その一端を絶縁
座１０の一部に固定しておく。振動子１のピン４
は鋸歯状溝列を端面に有する歯車ロータ７の鋸歯
に係合されている。歯車ロータ７のロータ軸８に
カナ１１を取付け、カナ１１を介して日ノ裏車１
２を設け、日ノ裏車１２の同軸上にカナ１３を取
付けておき、その一部を地板１４に表出させてお
く。このカナ１３に係合同しロータ軸８に滑合す
る筒車１５を前記地板１４上に設けておく。この
筒車１５はロータ軸８上のカナ１１と日ノ裏車１
２及び日ノ裏車と同軸上のカナ１３との歯数の比
で、ロータ軸８の１回転に対して1/12回転となる
よう定められている。この筒車１５を押えるよう
に地板１４の上に文字板１６を配し、前記筒車１
５に時針１７を取り付け、筒車１５の筒軸を貫通
するロータ軸に分針１８を取付けておけば時刻を
示すことができる。この時計の裏側はロータ軸８
及び日ノ裏車の軸を支持する輪列受１９で固定し
てある。 FIG. 4 shows an embodiment of a timepiece using the above-mentioned timepiece motor. In the figure, the vibrator 1 is an elastic body 2,
It consists of a piezoelectric element 3 and a pin 4, one end of which is fixed to a part of an insulating seat 10. Pin 4 of transducer 1
are engaged with the saw teeth of the gear rotor 7, which has a row of saw tooth grooves on its end face. A pinion 11 is attached to the rotor shaft 8 of the gear rotor 7, and the pinion wheel 1 is connected via the pinion 11.
2 is provided, a pinion 13 is attached on the same axis of the Hinoura wheel 12, and a part thereof is exposed on the main plate 14. An hour wheel 15 that engages with the pinion 13 and slides onto the rotor shaft 8 is provided on the base plate 14. This hour wheel 15 is connected to the pinion 11 on the rotor shaft 8 and the hinoura wheel 1.
2 and the ratio of the number of teeth between the hinoura wheel and the coaxial pinion 13, which is determined to be 1/12 rotation per one rotation of the rotor shaft 8. A dial 16 is arranged on the main plate 14 so as to press down the hour wheel 15, and the hour wheel 15 is
The time can be indicated by attaching an hour hand 17 to the hour wheel 15 and a minute hand 18 to the rotor shaft passing through the cylindrical shaft of the hour wheel 15. The back of this clock is the rotor shaft 8
And it is fixed with a train wheel bridge 19 that supports the shaft of the Hinoura wheel.
このような時計の圧電素子３に前に述べたよう
な１分間に１サイクルを終了する所定の電圧を交
番的に印加すると、振動子１のピン４により歯車
ロータ７の回転は分針１８に分を刻ませ、日ノ裏
車１２及び筒車１５を介して時針１７に時を刻ま
せることができる。 When a predetermined voltage that completes one cycle per minute as described above is applied alternately to the piezoelectric element 3 of such a watch, the rotation of the gear rotor 7 is caused by the pin 4 of the vibrator 1 to change to the minute hand 18. The hour hand 17 can be made to tick through the hour wheel 12 and the hour wheel 15.
上記の説明は分針と時針とによる２針型時計用
モータとして説明したが、振動子１の１サイクル
を１秒間で１サイクルとし、日ノ裏車及び筒車を
２組用いてそれぞれの端数を設定すれば３針型時
計用モータとしても用いることができる。 The above explanation is based on a two-hand watch motor with a minute hand and an hour hand, but one cycle of the oscillator 1 is assumed to be one cycle per second, and two sets of the hour wheel and hour wheel are used to calculate the fractions of each. If set, it can also be used as a motor for a three-hand watch.
第５図は振動子１の変位量を多くするため弾性
体２を長く且つ圧電素子３を長くした実施例で、
振動子１のピン４を歯車ロータ７の向側に係合さ
せ、振動子１を上方から斜め下向に取付けたもの
である。 FIG. 5 shows an embodiment in which the elastic body 2 and the piezoelectric element 3 are lengthened in order to increase the amount of displacement of the vibrator 1.
The pin 4 of the vibrator 1 is engaged with the opposite side of the gear rotor 7, and the vibrator 1 is mounted diagonally downward from above.
また第６図は弾性体２の長手方向半分ずつに90
度の位相をもつて圧電素子３ａ，３ｂ，３ｃ，３
ｄを取付けたバイモルフ型の構造を有する振動子
の実施例である。 In addition, in Figure 6, each half of the elastic body 2 in the longitudinal direction is
piezoelectric elements 3a, 3b, 3c, 3 with a phase of
d is an example of a vibrator having a bimorph structure.
この何れの振動子を用いても本考案による時計
用モータの駆動源として使用することができる。 Any of these vibrators can be used as a drive source for the timepiece motor according to the present invention.
［考案の効果］
この考案の時計は上記のような構成のものであ
るから、簡単な構成で確実に歯車ロータを１方向
へ回転でき、しかも振動子の駆動力が小さくてよ
いので、振動子の小型化でき、さらには時計全体
の小型化が計れるばかりか消費電力も小さくでき
るものである。[Effects of the invention] Since the clock of this invention has the above-mentioned structure, the gear rotor can be reliably rotated in one direction with a simple structure, and the driving force of the oscillator can be small, so the oscillator Not only can the watch be made smaller, the entire watch can be made smaller, but its power consumption can also be reduced.
第１図は本考案の実施例を示す斜視図、第２図
は第１図の振動子の断面図、第３図は順次に印加
する電圧のタイムチヤート、第４図は本考案の実
施例を時計に組込んだ側面断面図、第５図は本考
案の第２実施例の上面図、第６図は本考案の振動
子の第２実施例を示す斜視図である。
１……振動子、２……弾性体、３ａ，３ｂ，３
ｃ，３ｄ……圧電素子、４……ピン、７……歯車
ロータ。
Fig. 1 is a perspective view showing an embodiment of the present invention, Fig. 2 is a sectional view of the vibrator shown in Fig. 1, Fig. 3 is a time chart of sequentially applied voltages, and Fig. 4 is an embodiment of the present invention. FIG. 5 is a top view of the second embodiment of the present invention, and FIG. 6 is a perspective view of the second embodiment of the vibrator of the present invention. 1... Vibrator, 2... Elastic body, 3a, 3b, 3
c, 3d...piezoelectric element, 4...pin, 7...gear rotor.
Claims (1)
ータ７とを有し、 前記振動子１は、先端にピン４が取付けられ長
手方向に沿う４つの面夫々に圧電素子３ａ，３
ｂ，３ｃ，３ｄが配置された角柱状の弾性体２か
らなつていて他端が固定されており、 前記歯車ロータ７は、ロータ軸８と、このロー
タ軸８に固定され端部に前記ロータ軸８の軸方向
に突出する鋸歯状溝列が形成された円板９とから
なり、 前記振動子１のピン４は、前記円板９の鋸歯状
溝列に係合されていて、 前記弾性体２の前記４つの圧電素子３ａ，３
ｂ，３ｃ，３ｄに位相が90°づつずれた駆動信号
が供給されることにより前記ピン４が角状運動さ
れ、 このピン４の角状運動により前記鋸歯状溝列を
移動させて前記歯車ロータ７を回転させてなる時
計。[Claims for Utility Model Registration] It has a vibrator 1 and a geared rotor 7 for moving a pointer 18. Piezoelectric elements 3a, 3
The gear rotor 7 is made up of a prismatic elastic body 2 on which parts b, 3c, and 3d are arranged, and the other end is fixed, and the gear rotor 7 is fixed to the rotor shaft 8 and has the rotor a disk 9 on which a row of sawtooth grooves is formed that protrudes in the axial direction of a shaft 8; the pin 4 of the vibrator 1 is engaged with the row of sawtooth grooves of the disk 9; The four piezoelectric elements 3a, 3 of the body 2
The pin 4 is moved in an angular manner by supplying driving signals whose phases are shifted by 90 degrees to the pins b, 3c, and 3d, and this angular movement of the pin 4 moves the serrated groove row to move the gear rotor. A clock with a rotating 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986076979U JPH0431833Y2 (en) | 1986-05-23 | 1986-05-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986076979U JPH0431833Y2 (en) | 1986-05-23 | 1986-05-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62191396U JPS62191396U (en) | 1987-12-05 |
| JPH0431833Y2 true JPH0431833Y2 (en) | 1992-07-30 |
Family
ID=30924558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986076979U Expired JPH0431833Y2 (en) | 1986-05-23 | 1986-05-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0431833Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008512075A (en) * | 2004-09-03 | 2008-04-17 | シルマック | Drive device for clock mechanism |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2735922A1 (en) * | 2012-11-23 | 2014-05-28 | ETA SA Manufacture Horlogère Suisse | Drive mechanism for the hands of an electro-mechanical watch, provided with a locking device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5165858U (en) * | 1974-11-18 | 1976-05-24 |
-
1986
- 1986-05-23 JP JP1986076979U patent/JPH0431833Y2/ja not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008512075A (en) * | 2004-09-03 | 2008-04-17 | シルマック | Drive device for clock mechanism |
| JP4928455B2 (en) * | 2004-09-03 | 2012-05-09 | シルマック | Drive device for clock mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62191396U (en) | 1987-12-05 |
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