EP2919077B1 - Antriebsvorrichtung einer analoganzeige, insbesondere eines datumsanzeigerings - Google Patents

Antriebsvorrichtung einer analoganzeige, insbesondere eines datumsanzeigerings Download PDF

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Publication number
EP2919077B1
EP2919077B1 EP15156373.1A EP15156373A EP2919077B1 EP 2919077 B1 EP2919077 B1 EP 2919077B1 EP 15156373 A EP15156373 A EP 15156373A EP 2919077 B1 EP2919077 B1 EP 2919077B1
Authority
EP
European Patent Office
Prior art keywords
toothing
pins
drive wheel
timepiece movement
movement according
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.)
Active
Application number
EP15156373.1A
Other languages
English (en)
French (fr)
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EP2919077A3 (de
EP2919077A2 (de
Inventor
Baptist Wyssbrod
Julien Christan
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.)
ETA SA Manufacture Horlogere Suisse
Original Assignee
ETA SA Manufacture Horlogere Suisse
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 ETA SA Manufacture Horlogere Suisse filed Critical ETA SA Manufacture Horlogere Suisse
Priority to EP15156373.1A priority Critical patent/EP2919077B1/de
Publication of EP2919077A2 publication Critical patent/EP2919077A2/de
Publication of EP2919077A3 publication Critical patent/EP2919077A3/de
Application granted granted Critical
Publication of EP2919077B1 publication Critical patent/EP2919077B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B13/00—Gearwork
    • G04B13/02—Wheels; Pinions; Spindles; Pivots
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B13/00—Gearwork
    • G04B13/02—Wheels; Pinions; Spindles; Pivots
    • G04B13/027—Wheels; Pinions; Spindles; Pivots planar toothing: shape and design
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C17/00—Indicating the time optically by electric means
    • G04C17/005—Indicating the time optically by electric means by discs
    • G04C17/0058—Indicating the time optically by electric means by discs with date indication
    • G04C17/0066—Indicating the time optically by electric means by discs with date indication electromagnetically driven, e.g. intermittently

Definitions

  • the present invention relates to the field of watch movements having an analog display.
  • the invention relates to a drive device for an analog indicator, in particular a date ring.
  • analog indicators Various drive devices of an analog indicator are known to those skilled in the art.
  • a known problem of analog indicators comes from the fact that they are driven by a drive device generally comprising intermediate elements between a motor and the analog indicator. In the case where separate and stationary display positions are provided for a certain period of time, given the manufacturing tolerances and the necessary clearance between the various elements of the driving device, the precise positioning of the indicator is not possible. not guaranteed without holding means in position.
  • the patent application GB 2205181 A discloses a relatively complex device for the two-way drive of a date ring.
  • This device comprises a support formed by a drive wheel pivoted at its center and driven in rotation by a bidirectional motor.
  • On the drive wheel are mounted two pawls respectively pivoting about two respective axes which are spaced from the axis of rotation of the drive wheel.
  • a spring arranged on the drive wheel exerts a restoring force on the two pawls.
  • These two pawls are arranged to be able to drive the date ring respectively in the two directions of rotation, each of the two pawls retracting when the ring is driven by the other. Since the drive device proposed in this document has a significant tangential clearance between the ends of the two pawls and the toothing of the date ring, there is provided a jumper to precisely maintain the date ring in the plurality distinct display positions.
  • the object of the present invention is to provide a device for driving an analog indicator, in particular a date ring, which makes it possible to ensure precise positioning of the indicator without requiring a positioning jumper.
  • Another object of the invention is to provide such a drive device that can withstand shocks.
  • the subject of the present invention is a watch movement equipped with an analogue indicator of a plurality of distinct data which is arranged for this purpose to be kept stationary at least temporarily in any position of a plurality of positions of display, this analog indicator having a toothing mechanically coupled to a drive device.
  • the latter includes a motor, a driving mobile provided with meshing means with the toothing and a support on which is mounted the drive wheel.
  • the support of the drive wheel is mounted on a base so as to be pivotable about a first axis and the drive wheel is rotatably mounted on the support about a second axis remote from the first axis.
  • the driving device further comprises an elastic means exerting a lateral force on the support so that the meshing means of the drive wheel press against the toothing of the analog indicator, these meshing means and the toothing presenting respective profiles selected so that, at least in said plurality of distinct display positions of the analog indicator, the drive wheel and the analog indicator meshing substantially without tangential clearance under the action of the elastic means.
  • the elastic means is, in a variant, formed by a spring blade which presses laterally against the support of the drive wheel.
  • the drive device comprises a motor, of which only the pinion of its rotor 9 is shown in the figures, an intermediate wheel 10 and a drive wheel 8 or 8A of the date ring.
  • the engine is in a first variant a mechanical engine of the barrel type, while in another variant there is provided a clockwise electromechanical motor.
  • the intermediate wheel 10 is arranged between the rotor 9 of the motor and the drive wheel, its pinion meshing with this drive wheel.
  • the drive wheel 8 or 8A is provided with only two pins which rise from the central part of this wheel and which are aligned with the axis of rotation of this drive wheel and diametrically opposed. These two pins form meshing means of the drive wheel with the internal toothing 18 of the date ring.
  • the two pins 12 and 13 are respectively provided with two rollers 14 and 15.
  • both pins 12A and 13A do not have rollers.
  • meshing means there are mechanical coupling means between the date ring and the drive wheel.
  • the meshing means are constituted here on the one hand by the two pins, where appropriate provided with their respective rollers, and on the other hand by the internal toothing 18 of the date ring.
  • the drive wheel 8 or 8A is mounted on a support 22 which has a fixed pivot 34 arranged on a base 32 of larger diameter, this base defining a stop on which the drive wheel rests.
  • the fixed pivot defines the axis of rotation 36 of this drive wheel which has a central hole 38 in which is introduced this fixed pivot.
  • the support is mounted on a plate 24 and pivots about a pivot axis 26 which is defined by a shaft 28 passing through the support.
  • the axis of rotation 36 is remote from the pivot axis 26 so that the axis of the drive wheel follows a circular arc when the support pivots.
  • the intermediate wheel 10 is also mounted on the pivoting support 22 and its axis of rotation coincides with the pivot axis 26 of this support.
  • the axis of rotation of this intermediate wheel remains fixed relative to the plate 24 when the support 22 pivots; which makes it possible to ensure the coupling to the rotor 9 of the motor regardless of the angular position of the support.
  • the drive wheel Since the date ring partially passes over the drive wheel and the intermediate wheel, the drive wheel is held axially in position by the date ring and the intermediate wheel is held axially in position by a button 30 forming a stop.
  • the central part of the drive wheel In order for this button to be below the date ring, the central part of the drive wheel has the shape of a truncated cone. This makes it possible to obtain a difference in level between the toothing of the drive wheel and the two pins of this drive wheel and thus to have a space for the button above the pinion of the intermediate wheel.
  • the drive device further comprises a spring blade 40 which exerts a lateral force on the support 22 so that the two pins laterally press on the toothing 18 of the date ring towards the bottom of this toothing.
  • the spring blade is in tension and bears against a lateral surface of the support 22 so as to exert a certain force torque on the latter.
  • Other types of spring or other alternative elastic means for obtaining the torque of force necessary for the given function can be provided by the person skilled in the art.
  • the teeth of the date ring have a profile with teeth 19 having recesses 20 between them, this profile being arranged to cooperate with the two pins or, where appropriate, the two rollers so that when both pins (provided or not with rolling rollers) are in a tangential orientation relative to the date ring, the drive wheel and the date ring meshing substantially without tangential play under the action of the spring blade 40.
  • the recesses 20 are provided to allow to accommodate the pins 12 and 13 provided with their rollers with a very small tangential clearance when the two rollers press against the bottom of the toothing, that is to say here against the bottom recesses 20.
  • the drive device jointly ensures the drive of the date ring and a precise positioning thereof in the display positions of the different dates.
  • the drive device especially in the preferred embodiment with a drive wheel provided with two pins which are aligned with the axis of rotation of this drive wheel, the drive device further forms a high-performance anti-shock system. Indeed, during a shock producing a torque force on the date ring, the drive wheel exerts a reaction force that keeps the date ring in position.
  • the drive wheel has more than two pins, in particular three or four pins, arranged equidistantly on a circle whose center of rotation is the axis of rotation. of this drive wheel.
  • These pins can also be provided in a variant of rollers.
  • the drive device is similar to the embodiment described using the Figures 1 to 3 .
  • the Figures 4 and 5 are shown two variants of the combination of a profile of the tooth 18A of the date ring and two adjacent pins meshing with this toothing 18A.
  • the teeth 19A of the toothing have non-parallel flanks each defining a monotonically increasing curve relative to the central axis 44 of the tooth corresponding in the direction of the bottom of this toothing.
  • the distance L1 between the two pins 12A and 13A or, where appropriate, the distance L2 between the two respective rollers 14 and 15 is provided so as to have, in the display positions of the date ring, two points of contact between the two pins or, where appropriate, between the two respective rollers and respectively two flanks of a tooth ( Figure 4 ) or two teeth having an intermediate tooth between them ( Figure 5 ), without touching the bottom of the toothing.
  • These variants are particularly advantageous because, in cooperation with the leaf spring 40, the arrangement of the toothing and the spacing between the pins are such that there is no more tangential clearance when the two pins have a tangential orientation, as represented on the Figures 4 and 5 . It will be noted that this characteristic is obtained despite usual manufacturing tolerances.
  • the average angular aperture defined by the tooth flanks and the depth of the toothing are selected so that, throughout the tolerance range (ie the various accumulated tolerances), the pins or, where appropriate the rollers do not come into abutment at the bottom of the recesses 20A of the toothing.
  • the watch movement comprises a control unit arranged to drive this electromagnetic motor, preferably in an accelerated mode when passing from a display position to a position of a motor. next display of the date ring.
  • the transitional periods are short-lived; which limits the risk of shock when rotating the drive wheel.
  • a moment of force exerted on the ring generates a moment of force on the drive wheel which has only one pin in the teeth.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromechanical Clocks (AREA)

Claims (13)

  1. Uhrwerk, ausgestattet mit einem analogen Anzeiger (6) für mehrere verschiedene Daten, der zu diesem Zweck so angeordnet ist, dass er mindestens vorübergehend in einer beliebigen Position von mehreren verschiedenen Anzeigepositionen stehend gehalten wird, wobei dieser analoge Anzeiger eine Zahnung (18, 18A) besitzt, die mit einer Antriebsvorrichtung (4) mechanisch gekoppelt ist, die einen Antrieb und ein Antriebsdrehteil (8, 8A) umfasst, das mit Mitteln (12, 13, 12A, 13A, 14, 15) für den Eingriff mit der Zahnung versehen ist, wobei diese Antriebsvorrichtung ferner einen Träger (22) aufweist, auf dem das Antriebsdrehteil montiert ist, und dieser Träger auf einer Basis (24) derart montiert ist, dass er um eine erste Achse (26) schwenken kann, und wobei das Antriebsdrehteil auf diesem Träger drehbar um eine von der ersten Achse entfernte zweite Achse (36) montiert ist,
    wobei die Antriebsvorrichtung ferner ein elastisches Mittel (40) umfasst, das auf den Träger eine seitliche Kraft ausübt, derart, dass die Eingriffsmittel des Antriebsdrehteils seitlich gegen die Zahnung des analogen Anzeigers in Richtung des Grunds dieser Zahnung drücken, wobei die Eingriffsmittel und die Zahnung jeweilige Profile aufweisen, die so gewählt sind, dass das Antriebsdrehteil und der analoge Anzeiger mindestens in den mehreren verschiedenen Anzeigepositionen des analogen Anzeigers unter der Wirkung des elastischen Mittels im Wesentlichen ohne tangentiales Spiel ineinandergreifen.
  2. Uhrwerk nach Anspruch 1, dadurch gekennzeichnet, dass die Antriebsvorrichtung ferner ein Zwischenrad (10) umfasst, das zwischen dem Antrieb und dem Antriebsdrehteil angeordnet ist und mit diesem Antriebsdrehteil in Eingriff steht, wobei dieses Zwischenrad an dem schwenkbaren Träger (22) montiert ist und eine Drehachse besitzt, die mit der ersten Schwenkachse (26) dieses Trägers zusammenfällt.
  3. Uhrwerk nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der analoge Anzeiger ein Datumsring ist und dass die Zahnung eine Innenzahnung dieses Datumsrings ist.
  4. Uhrwerk nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Eingriffsmittel durch mindestens drei Stifte gebildet sind, die von dem Antriebsdrehteil vorstehen.
  5. Uhrwerk nach Anspruch 4, dadurch gekennzeichnet, dass die Stifte jeweils mit einer Laufrolle versehen sind.
  6. Uhrwerk nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass die Zähne (19A) der Zahnung nicht parallele Flanken aufweisen, die jeweils eine relativ zu der Mittelachse (44) des entsprechenden Zahns in Richtung des Grunds dieser Zahnung monoton steigende Kurve definieren; und dass der Abstand (L1) zwischen zwei benachbarten Stifte, gegebenenfalls zwischen den beiden jeweiligen Laufrollen, so vorgesehen ist, dass in den mehreren verschiedenen Anzeigepositionen des analogen Anzeigers zwei Kontaktpunkte zwischen den beiden benachbarten Stifte oder gegebenenfalls zwischen den beiden jeweiligen Laufrollen und entsprechend den beiden Flanken eines Zahns vorhanden sind, ohne den Grund der Zahnung zu berühren.
  7. Uhrwerk nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass die Zähne (19A) der Zahnung nicht parallele Flanken aufweisen, die jeweils eine relativ zur Mittelachse (44) des entsprechenden Zahns in Richtung des Grunds dieser Zahnung monoton steigende Kurve definieren; und dass der Abstand (L2) zwischen zwei benachbarten Stifte, gegebenenfalls zwischen den beiden jeweiligen Laufrollen, so vorgesehen ist, dass in den mehreren verschiedenen Anzeigepositionen des analogen Anzeigers zwei Kontaktpunkte zwischen den beiden benachbarten Stiften oder gegebenenfalls zwischen den beiden jeweiligen Rollen und entsprechend zwei Flanken von zwei jeweiligen Zähnen, die zwischen sich einen Zwischenzahn aufweisen, vorhanden sind, ohne den Grund der Zahnung zu berühren.
  8. Uhrwerk nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Eingriffsmittel nur durch zwei Stifte (12, 13, 12A, 13A) gebildet sind, die sich von dem Antriebsdrehteil erstrecken, wobei diese beiden Stifte auf die Drehachse dieses Antriebsdrehteils ausgerichtet sind und einander diametral gegenüberliegen.
  9. Uhrwerk nach Anspruch 8, dadurch gekennzeichnet, dass die beiden Stifte jeweils mit einer Laufrolle (14, 15) versehen sind.
  10. Uhrwerk nach Anspruch 8 oder 9, dadurch gekennzeichnet, dass die Zähne (19A) der Zahnung nicht parallele Flanken aufweisen, die jeweils eine relativ zu der Mittelachse (44) des entsprechenden Zahns in Richtung des Grunds dieser Zahnung monoton steigende Kurve definieren, und dass der Abstand (L1) zwischen den beiden Stifte, gegebenenfalls zwischen den beiden jeweiligen Laufrollen, so vorgesehen ist, dass in den mehreren verschiedenen Anzeigepositionen des analogen Anzeigers zwei Kontaktpunkte zwischen den beiden Stiften oder gegebenenfalls zwischen den beiden jeweiligen Laufrollen und entsprechend zwei Flanken eines Zahns vorhanden sind, ohne den Grund der Zahnung zu berühren.
  11. Uhrwerk nach Anspruch 8 oder 9, dadurch gekennzeichnet, dass die Zähne (19A) der Zahnung nicht parallele Flanken aufweisen, die jeweils eine relativ zu der Mittelachse (44) des entsprechenden Zahns in Richtung des Grunds dieser Zahnung monoton steigende Kurve definieren, und dass der Abstand (L2) zwischen den beiden Stiften, gegebenenfalls zwischen den beiden jeweiligen Laufrollen, so vorgesehen ist, dass in den mehreren verschiedenen Anzeigepositionen des analogen Anzeigers zwei Kontaktpunkte zwischen den beiden Stiften oder gegebenenfalls zwischen den beiden jeweiligen Rollen und entsprechend zwei Flanken von zwei Zähnen, die zwischen sich einen Zwischenzahn aufweisen, vorhanden sind, ohne den Grund der Zahnung zu berühren.
  12. Uhrwerk nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Antrieb ein elektromagnetischer Antrieb ist und dass dieses Uhrwerk eine Steuereinheit umfasst, die dazu angeordnet ist, diesen elektromagnetischen Antrieb beim Wechsel von einer bestimmten Anzeigeposition in eine folgende bestimmte Anzeigeposition in einem beschleunigten Modus anzutreiben.
  13. Uhrwerk nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das elastische Mittel, das auf den Träger eine seitliche Kraft ausübt, durch ein Federblatt (40) gebildet ist.
EP15156373.1A 2014-03-10 2015-02-24 Antriebsvorrichtung einer analoganzeige, insbesondere eines datumsanzeigerings Active EP2919077B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15156373.1A EP2919077B1 (de) 2014-03-10 2015-02-24 Antriebsvorrichtung einer analoganzeige, insbesondere eines datumsanzeigerings

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP14158625.5A EP2919076A1 (de) 2014-03-10 2014-03-10 Antriebsvorrichtung einer Analoganzeige, insbesondere eines Datumsanzeigerings
EP15156373.1A EP2919077B1 (de) 2014-03-10 2015-02-24 Antriebsvorrichtung einer analoganzeige, insbesondere eines datumsanzeigerings

Publications (3)

Publication Number Publication Date
EP2919077A2 EP2919077A2 (de) 2015-09-16
EP2919077A3 EP2919077A3 (de) 2016-05-25
EP2919077B1 true EP2919077B1 (de) 2019-08-07

Family

ID=50238257

Family Applications (2)

Application Number Title Priority Date Filing Date
EP14158625.5A Withdrawn EP2919076A1 (de) 2014-03-10 2014-03-10 Antriebsvorrichtung einer Analoganzeige, insbesondere eines Datumsanzeigerings
EP15156373.1A Active EP2919077B1 (de) 2014-03-10 2015-02-24 Antriebsvorrichtung einer analoganzeige, insbesondere eines datumsanzeigerings

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP14158625.5A Withdrawn EP2919076A1 (de) 2014-03-10 2014-03-10 Antriebsvorrichtung einer Analoganzeige, insbesondere eines Datumsanzeigerings

Country Status (5)

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US (1) US9411311B2 (de)
EP (2) EP2919076A1 (de)
JP (1) JP5947937B2 (de)
CN (1) CN104914703B (de)
HK (1) HK1215077A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3193217A1 (de) 2016-01-18 2017-07-19 ETA SA Manufacture Horlogère Suisse Uhrwerk, das eine analoganzeige umfasst
EP3627239B1 (de) * 2016-07-05 2024-04-17 Montres Breguet S.A. Walzenanzeigemechanismus für armbanduhr
CN108459489B (zh) * 2017-02-17 2021-06-15 精工电子有限公司 机构模块、机芯以及钟表

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS487095Y1 (de) * 1969-10-01 1973-02-23
CH538136A (fr) * 1971-02-05 1973-07-31 Suisse Horlogerie Mécanisme dateur pour pièce d'horlogerie
US3738097A (en) * 1971-07-12 1973-06-12 Omega Brandt & Freres Sa Louis Mechanism for driving and correcting a data disc in a day-date timepiece
CH560411A (de) * 1971-07-12 1975-03-27
CH574125B5 (de) * 1972-04-05 1976-03-31 Suisse Horlogerie
US4050233A (en) * 1975-09-27 1977-09-27 Pforzheimer Uhren-Rohwerke Rudolf Wehner Stepping mechanism for watches
CH610482B (fr) * 1976-06-16 Schild Sa A Mouvement de montre-calendrier.
JPS6059550B2 (ja) * 1977-06-03 1985-12-25 シチズン時計株式会社 カレンダ時計
JPS5474465A (en) * 1977-11-26 1979-06-14 Citizen Watch Co Ltd Month correcting mechanism for calendar watch
JPS60173491A (ja) * 1985-01-21 1985-09-06 Citizen Watch Co Ltd 月末無修正機構付電子時計
CH669082GA3 (de) * 1987-05-25 1989-02-28
CH678908B5 (de) * 1990-04-04 1992-05-29 Rolex Montres
CH682285B5 (fr) * 1991-12-20 1994-02-28 Ebauchesfabrik Eta Ag Pièce d'horlogerie du type mécanique ou électromécanique comportant une roue d'entraînement pilotant au moins un dispositif d'affichage, tel qu'un affichage des quantièmes.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
HK1215077A1 (zh) 2016-08-12
US20150253732A1 (en) 2015-09-10
JP2015169660A (ja) 2015-09-28
EP2919077A3 (de) 2016-05-25
EP2919077A2 (de) 2015-09-16
US9411311B2 (en) 2016-08-09
CN104914703B (zh) 2017-06-09
EP2919076A1 (de) 2015-09-16
CN104914703A (zh) 2015-09-16
JP5947937B2 (ja) 2016-07-06

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