EP0097168B1 - Clock and watch module comprising an electronic circuit and a calender device - Google Patents

Clock and watch module comprising an electronic circuit and a calender device Download PDF

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Publication number
EP0097168B1
EP0097168B1 EP82903447A EP82903447A EP0097168B1 EP 0097168 B1 EP0097168 B1 EP 0097168B1 EP 82903447 A EP82903447 A EP 82903447A EP 82903447 A EP82903447 A EP 82903447A EP 0097168 B1 EP0097168 B1 EP 0097168B1
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EP
European Patent Office
Prior art keywords
date
contact
electronic
circuit
pulses
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Expired
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EP82903447A
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German (de)
French (fr)
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EP0097168A1 (en
Inventor
Jean-Daniel Dubois
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Nouvelle Lemania SA
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Nouvelle Lemania SA
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Publication of EP0097168A1 publication Critical patent/EP0097168A1/en
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    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F8/00—Apparatus for measuring unknown time intervals by electromechanical means
    • G04F8/006—Apparatus for measuring unknown time intervals by electromechanical means running only during the time interval to be measured, e.g. stop-watch
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/008—Mounting, assembling of components
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/14—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating a stepping motor
    • G04C3/146—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating a stepping motor incorporating two or more stepping motors or rotors
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G9/00—Visual time or date indication means
    • G04G9/08—Visual time or date indication means by building-up characters using a combination of indicating elements, e.g. by using multiplexing techniques
    • G04G9/085—Visual time or date indication means by building-up characters using a combination of indicating elements, e.g. by using multiplexing techniques provided with date indication

Definitions

  • the present invention relates to clock modules comprising a display of the time by analog means and in particular by means of hour and minute hands which are carried respectively by an hour wheel and a floor, these two mobiles being mounted coaxially in the center of the module.
  • timepiece modules of this kind are generally driven by a stepping motor receiving its energy from a battery and the time base is constituted by an electronic device such as an oscillating quartz circuit. and a frequency divider.
  • a means of displaying the date recourse is in most cases to a display member of the type which has already been used in mechanical watches, ie .d. a date ring placed under the dial, the indications of which appear in a window arranged in the dial.
  • This date ring is driven by a jumping mechanism which gradually arms during the hours preceding midnight, so that the stepping motor which actuates the train encounters greater resistance during these hours than during most of it. hours of the day.
  • patent FR-A-2,416,503 proposes a switching wheel which is driven by the gear train and carries at its periphery one or more protruding contact elements intended to come into contact with corresponding fixed elements, once per revolution .
  • this arrangement has the consequence that the stepping motor driving the train is subjected to a variable torque due to the friction of the contact element. It is therefore necessary to build it in such a way that it can provide the maximum torque required, permanently.
  • Other date display devices also comprising a variable torque on the stepping motor are also described in the documents FR-A- 2,170,989, GB-A- 2,017,356, GB-A- 2,071,364 and DE-A- 2,925,278.
  • the object of the present invention is to provide another solution to the problem mentioned above, this other solution having the advantage of avoiding any risk of desynchronization between the date display and the time display and subjecting the constant torque stepping motor capable of regulating its progress.
  • the subject of the present invention is a timepiece comprising an electronic time base and a time display device with a stepping motor and a gear train, certain elements of which constitute organs of display, and on the other hand an electronic counting and date display means, characterized in that one of the elements of said gear train which is the slowest element comprises a disc made of insulating material which has a circular sliding surface and a metallic grounding contact element partially embedded in said surface, and in that the electronic date display means is connected to an elastic detector blade kept permanently in contact with the said sliding surface, the said blade acting on the one hand mechanically on the said gear element as a brake to eliminate the backlash and on the other hand electronically on the date display means for making advance the date indication displayed when it covers said contact element and is then grounded.
  • Fig.1 is a partially schematic top plan view showing a calendar watch in which the date is displayed by means of an electro-optical cell 21.
  • This watch includes as battery a battery 22 which supplies an electronic circuit 23 fixed to a printed circuit board 24.
  • the battery 22 further supplies a stepping motor 25, the rotor 26 of which drives a train consisting of elements 27, 26, 29, the element 29 being a minute wheel, the barrel of which can carry a central minute hand.
  • This minute wheel is engaged with a timer wheel 30, the pinion of which drives an hour wheel 31.
  • the barrel of this hour wheel can carry a usual hour hand, while its peripheral toothing drives a return wheel 32 the wheel teeth of which drive a 24-hour wheel 33.
  • the watch module shown in fig. 1 further comprises a control mechanism which can be operated by means of a crown 34 fixed to the end of a rod 35 disposed radially in the module.
  • the axial position of this rod is determined by a pull tab 36 of conventional construction held in place by a spring 37 which is cut in one piece with a rocker lever 36.
  • This rocker 36 controls on the one hand a sliding pinion 39 and d on the other hand a switch which is constituted by a movable contact element 40 situated at the end of the finger of the rocker and by a terminal 41 constituted by a metal blade, for example a gold blade cut and folded.
  • the base of this terminal 41 is welded to the board 24 at the location of a conductive track connected to the circuit 23.
  • the terminal 41 also has a tongue-shaped element which extends freely and the end of which is located opposite the contact element 40.
  • the rocker 38 has a notch 38a arranged so that when the rod 35 is pulled into an intermediate position (11), the contact element 40 and the sliding pinion 39 are moved towards the outside of the module and the contact element 40 touches the elastic tongue of the terminal 41. This terminal is then earthed.
  • cell 21 will be a liquid crystal cell, although other electro-optical systems may also be used.
  • This cell is mounted on a board 24 and its connection terminals (not shown) are connected to the circuit 23 by conductive tracks.
  • the 24-hour mobile 33 which is driven at an angular speed equal to half that of the hour wheel is shown in more detail in FIG. 3.
  • a metal disc 43 driven on a shaft 44 long enough to cross the dial of the timepiece described and carry at its upper end a 24-hour hand (not shown).
  • this mobile could also include a short shaft without an indicator member.
  • Under the disc 43 is fixed a lining 45 made of plastic, preferably Delrin, the periphery of which includes a groove 45a. At one point of its periphery, this groove is perforated and the rod of a pin 46 driven into a hole in the disc 43 projects slightly into the bottom of this groove.
  • the printed circuit board 24 extends below the mobile 33 and bears, opposite the groove 45a, a terminal 47 also consisting of a folded gold strip, so as to form a tongue with a V-folded end and engaged in throat 45a. Once per revolution of the wheel 33, the terminal 47 will therefore be earthed when the pin 46 comes into contact with its free end.
  • a terminal 47 also consisting of a folded gold strip, so as to form a tongue with a V-folded end and engaged in throat 45a.
  • this watch is as follows: a quartz 48 fixed under the printed circuit board 24 controls a frequency divider whose output pulses control, at a stable frequency, for example 1 Hz, the drive of the motor.
  • the circuit 23 further comprises a counter and a decoder which control the cell 21 from the pulses which the counter receives at each revolution of the wheel 33 when the contact element 46 is connected to the terminal 47.
  • the decoder is arranged to so as to cause the digits 1 to 31 to appear successively on cell 21.
  • the date jump being controlled by contact 46/47, it will always be synchronized with the position of the hands and will occur each time at midnight.
  • the correction of the date takes place electronically when the rod 34 is in position II. Indeed, the closing of the contact 41/40 commands in the electronic circuit 23 the emission of pulses, for example at a frequency of 1 Hz but only beginning two seconds counted from the closing of the contact and these pulses at a frequency of 1 Hz are transmitted to the decoder so that the day numbers scroll on cell 21 at the frequency of 1 Hz. Similarly, if the time is set by means of the crown 34, making pass the hands through the midnight position, automatically a pulse will be given to the date decoder which will advance the cell by one.
  • the counting of the pulses supplied by the contact 46/47 will be arranged so that when the contact element 46 comes into contact with the blade 47, a first pulse is recorded and the recording of other pulses is blocked for all the time during which the contact element slides under the blade 47. This avoids false impulses which could result from rebounds of the blade 47 on the contact element 46.
  • the details of the circuit arrangement which allow only receive the first recorded pulse, are known per se and it is not necessary to describe them here.
  • the contact blade 47 presses against the mobile 33 not only while the pin 46 is facing its tip, but also throughout the duration of the rotation of this mobile. It indeed presses against the bottom of the groove 45a and acts as friction, which eliminates gear sets.
  • the blade 47 therefore serves to regulate not only the rotation of the mobile 33 which triggers the date change at precise midnight, but also the rotation of the other indicator mobiles, in particular the hour wheel 31 and the minute wheel 29.
  • the hour wheel 31 could be shaped like the mobile 33 and carry a pin moving in the path of a contact blade such as the contact blade 47.
  • the mobile 33 and the mobile 32 could be deleted.
  • the electronic circuit is conformed so that the change of date is only ordered once in two under the effect of the pulses resulting from the closing of the contact 46/47.
  • the mobile 33 would rotate at the same speed as the mobile 31 and the circuit should be arranged so as to control the date change only once on them.
  • Fig.3 shows an embodiment in which the date display means are different from those provided in the embodiment according to fig.1, all the rest of the elements of the module being also the same.
  • These display means comprise a motor 49, the construction of which may be the same as that of the motor 25, but which, as will be seen later, could operate slightly differently.
  • the rotor 50 of this motor drives by its pinion a date switching mobile 51, the finger 51 of which engages in the toothing 52a of a date ring 52, which may be of usual construction.
  • This ring is placed under the dial and carries on its upper surface the indications of the dates from 1 to 31. Its toothing is also 31 teeth and it is held in place normally by means of a jumper spring 53.
  • a window which can being located for example at three o'clock, or at noon, allows one to see one of the calendars carried by the ring 52.
  • the electronic circuit 23 commands a series of predetermined pulses to be sent to the motor 49. These pulses can follow one another at a relatively high frequency and cause the rotor 50 to rotate so that the mobile 51 performs a full turn on itself. During this rotation, his finger 51a a will engage in the toothing 52a and advance the date ring 52 by one step.
  • the frequency of its operation can be relatively high and its drive torque can be low, since the drive is direct.
  • the resistance torque which it must overcome at each pulse to drive the train is very low and on the other hand perfectly regular. Thus, the torque of this motor and the duration of its pulses can be adjusted to minimum values, which contributes to saving the energy of the battery 22.
  • the 24-hour wheel 33 is always synchronized with the hours and minutes, even when the time is corrected by the sliding pinion 9 and the crown 34. It is therefore the 24-hour wheel which controls and guarantees the change of date and not an electronic circuit whose programming remains complex.
  • the rod 34 is pulled into a position 11 which closes the contact 40/41.
  • the circuit 23 then controls the motor 49 continuously, so that the date indications scroll through the window.
  • the motor 49 could also cause a calendar mechanism with calendar and days of the week comprising a day star, as well as, in the form of execution described in relation to FIG. 2, cell 21 could also include a moven for displaying the day of the week.

Abstract

PCT No. PCT/CH82/00128 Sec. 371 Date Aug. 16, 1983 Sec. 102(e) Date Aug. 16, 1983 PCT Filed Dec. 3, 1982 PCT Pub. No. WO83/02340 PCT Pub. Date Jul. 7, 1983.The liquid crystal display cell (21) indicates the date in an aperture situated at 12 o'clock. The hour wheel (31) and the center wheel (29) present coaxial pipes which pass through the dial and bear hour and minute hands. These wheels are driven by a wheel-train (30, 28, 27) actuated by the stepping motor (25) which receives its pulses from the circuit (23) controlled at a frequency of 1 Hz for example by the quartz (48). The 24-hour wheel (33) bears a contact element (46) which, once per revolution, grounds the terminal (47). The pulse which results therefrom is transmitted to a counter incorporated in the circuit (23). This counter controls the decoding circuit which controls the display cell (21). To effect the setting of the date, the stem (35) is brought into its intermediate position (II). The contact element (40) borne by the yoke (38) then grounds the terminal (41), which causes in the circuit (23) the emission of pulses at a frequency of 1 Hz which controls a repeated and rapid change of date.

Description

La présente invention se rapporte aux modules d'horlogerie comportant un affichage de l'heure par des moyens analogiques et en particulier au moyen d'aiguilles des heures et des minutes qui sont portées respectivement par une roue des heures et une chaussée, ces deux mobiles étant montés coaxialement au centre du module.The present invention relates to clock modules comprising a display of the time by analog means and in particular by means of hour and minute hands which are carried respectively by an hour wheel and a floor, these two mobiles being mounted coaxially in the center of the module.

A l'heure actuelle, les modules d'horlogerie de ce genre sont en général entraînés par un moteur pas à pas recevant son énergie d'une pile et la base de temps est constituée par un dispositif électronique tel qu'un circuit oscillant à quartz et un diviseur de fréquence. Lorsque l'on désire incorporer à un module de ce genre un moyen d'affichage de la date, on a recours dans la plupart des cas à un organe d'affichage du type qui a déjà été utilisé dans les montres mécaniques, c.à.d. un anneau de quantième disposé sous le cadran, et dont les indications apparaissent dans un guichet ménagé dans le cadran. Cet anneau de quantième est entraîné par un mécanisme sautant qui s'arme peu à peu durant les heures qui précédent minuit, de sorte que le moteur pas à pas qui actionne le rouage rencontre une résistance plus grande durant ces heures que durant la plus grande partie des heures de la journée. Cette circonstance exerce une influence assez considérable sur la construction du moteur ainsi que sur la consommation générale de l'énergie et la durée de vie des piles. Pour remédier à cet inconvénient on a déjà proposé, notamment dans la demande de brevet français no. 24 88 703, de prévoir dans le module un second moteur qui reçoit des impulsions une fois par jour et qui fait avancer l'anneau de quantième d'un pas aux environ de minuit. La commande de ce second moteur résulte d'une opération de comptage qui doit être effectuée dans le circuit électronique piloté par la base de temps à quartz, de sorte qu'il est nécessaire de veiller à ce que la synchronisation entre la position des aiguilles et la position de l'anneau de quantième soit maintenue.At present, timepiece modules of this kind are generally driven by a stepping motor receiving its energy from a battery and the time base is constituted by an electronic device such as an oscillating quartz circuit. and a frequency divider. When it is desired to incorporate in a module of this kind a means of displaying the date, recourse is in most cases to a display member of the type which has already been used in mechanical watches, ie .d. a date ring placed under the dial, the indications of which appear in a window arranged in the dial. This date ring is driven by a jumping mechanism which gradually arms during the hours preceding midnight, so that the stepping motor which actuates the train encounters greater resistance during these hours than during most of it. hours of the day. This circumstance exerts a rather considerable influence on the construction of the engine as well as on the general consumption of energy and the lifespan of the batteries. To remedy this drawback, it has already been proposed, in particular in French patent application no. 24 88 703, to provide in the module a second motor which receives pulses once a day and which advances the date ring by one step around midnight. The control of this second motor results from a counting operation which must be carried out in the electronic circuit controlled by the quartz time base, so that it is necessary to ensure that the synchronization between the position of the hands and the position of the date ring is maintained.

Dans certaines exécutions (US-A- 3,911,665) on prévoit un affichage de la date au moyen d'une cellule électro-optique dont l'inertie est nulle, qui est commandée directement par le circuit électronique sans passer par l'intermédiaire d'un moteur et qui par conséquent évite au moteur pas à pas entraînant les aiguilles des heures et des minutes toute surcharge momentanée. Toutefois, dans ce cas également, il faut veiller à ce que la synchronisation entre le comptage effectué par le circuit électronique et la position des aiguilles soit maintenue.In certain executions (US-A-3,911,665) provision is made for a date display by means of an electro-optical cell whose inertia is zero, which is controlled directly by the electronic circuit without passing through a motor and which consequently prevents the stepping motor driving the hour and minute hands from any momentary overload. However, in this case also, it is necessary to ensure that the synchronization between the counting carried out by the electronic circuit and the position of the hands is maintained.

Pour assurer la synchronisation, le brevet FR-A-2,416,503 propose une roue de commutation qui est entraînée par le rouage et porte à sa périphérie un ou plusieurs éléments de contact saillant destinés à entrer en contact avec des éléments fixes correspondants, une fois par tour. On a constaté cependant que cette disposition avait pour conséquence que le moteur pas à pas entraînant le rouage était soumis à un couple variable du fait du frottement de l'élément de contact. Il est donc nécessaire de le construire de telle manière qu'il puisse fournir le couple maximum requis, en permanence. D'autres dispositifs d'affichage de quantièmes comportant également un couple variable sur le moteur pas à pas sont aussi décrits dans les documents FR-A- 2,170,989, GB-A- 2,017,356, GB-A- 2,071,364 et DE-A- 2,925,278.To ensure synchronization, patent FR-A-2,416,503 proposes a switching wheel which is driven by the gear train and carries at its periphery one or more protruding contact elements intended to come into contact with corresponding fixed elements, once per revolution . However, it has been found that this arrangement has the consequence that the stepping motor driving the train is subjected to a variable torque due to the friction of the contact element. It is therefore necessary to build it in such a way that it can provide the maximum torque required, permanently. Other date display devices also comprising a variable torque on the stepping motor are also described in the documents FR-A- 2,170,989, GB-A- 2,017,356, GB-A- 2,071,364 and DE-A- 2,925,278.

La présente invention a pour but de fournir une autre solution au problème évoqué ci-dessus, cette autre solution ayant l'avantage d'éviter tout risque de désynchronisation entre l'affichage du quantième et l'affichage de l'heure et de soumettre le moteur pas à pas à un couple constant, capable de régulariser sa marche.The object of the present invention is to provide another solution to the problem mentioned above, this other solution having the advantage of avoiding any risk of desynchronization between the date display and the time display and subjecting the constant torque stepping motor capable of regulating its progress.

Dans ce but, la présente invention a pour objet une pièce d'horlogerie comprenant une base de temps électronique et un dispositif d'affichage de l'heure avec un moteur pas à pas et un train d'engrenage dont certains éléments constituent des organes d'affichage, et d'autre part un moyen électronique de comptage et d'affichage de la date, caractérisée en ce que l'un des éléments du dit train d'engrenage qui est l'élément le plus lent comporte un disque en matière isolante qui présente une surface circulaire de glissement et un élément de contact métallique de mise à la masse partiellement noyé dans la dite surface, et en ce que le moyen électronique d'affichage de la date est connecté à une lame élastique détectrice maintenue en permanence en contact avec la dite surface de glissement, la dite lame agissant d'une part mécaniquement sur le dit élément d'engrenage comme frein pour éliminer les jeux d'engrenage et d'autre part électroniquement sur le moyen d'affichage de la date pour faire avancer l'indication de date affichée lorsqu'elle recouvre le dit élément de contact et est alors mise à la masse.To this end, the subject of the present invention is a timepiece comprising an electronic time base and a time display device with a stepping motor and a gear train, certain elements of which constitute organs of display, and on the other hand an electronic counting and date display means, characterized in that one of the elements of said gear train which is the slowest element comprises a disc made of insulating material which has a circular sliding surface and a metallic grounding contact element partially embedded in said surface, and in that the electronic date display means is connected to an elastic detector blade kept permanently in contact with the said sliding surface, the said blade acting on the one hand mechanically on the said gear element as a brake to eliminate the backlash and on the other hand electronically on the date display means for making advance the date indication displayed when it covers said contact element and is then grounded.

On va décrire ci-après à titre d'exemple deux formes de réalisation de l'objet de l'invention en se référant au dessins annexés, dont:

  • la fig. 1 est une vue en plan de dessus d'un module d'horlogerie qui constitue la première forme d'exécution de l'invention,
  • la fig. 2 est une vue en coupe selon la ligne II-II de la fig. 1, et
  • la fig. 3 une vue analogue à la fig. 1 montrant la seconde forme d'exécution de l'objet de l'invention.
Two embodiments of the subject of the invention will be described below by way of example with reference to the accompanying drawings, of which:
  • fig. 1 is a top plan view of a timepiece module which constitutes the first embodiment of the invention,
  • fig. 2 is a sectional view along line II-II of FIG. 1, and
  • fig. 3 a view similar to FIG. 1 showing the second embodiment of the object of the invention.

La fig.1 est une vue en plan de dessus partiellement schématique représentant une montre-calendrier dans laquelle l'affichage de la date est réalisé au moyen d'une cellule électro-optique 21. Cette montre comporte comme source d'énergie une pile 22 qui alimente un circuit électronique 23 fixé sur une planche de circuit imprimé 24. La pile 22 alimente en outre un moteur pas à pas 25 dont le rotor 26 entraîne un rouage constitué d'éléments 27, 26, 29, l'élément 29 étant une roue des minutes, dont le canon peut porter une aiguille centrale des minutes. Cette roue des minutes est en prise avec une roue de minuterie 30, dont le pignon entraîne une roue des heures 31. Le canon de cette roue des heures peut porter une aiguille des heures usuelle, tandis que sa denture périphérique entraîne un mobile de renvoi 32 dont la denture de roue entraîne une roue de 24 heures 33.Fig.1 is a partially schematic top plan view showing a calendar watch in which the date is displayed by means of an electro-optical cell 21. This watch includes as battery a battery 22 which supplies an electronic circuit 23 fixed to a printed circuit board 24. The battery 22 further supplies a stepping motor 25, the rotor 26 of which drives a train consisting of elements 27, 26, 29, the element 29 being a minute wheel, the barrel of which can carry a central minute hand. This minute wheel is engaged with a timer wheel 30, the pinion of which drives an hour wheel 31. The barrel of this hour wheel can carry a usual hour hand, while its peripheral toothing drives a return wheel 32 the wheel teeth of which drive a 24-hour wheel 33.

Le module de la montre représentée à la fig. 1 comporte en outre un mécanisme de commande qui peut être manoeuvré au moyen d'une couronne 34 fixée à l'extrémité d'une tige 35 disposée radialement dans le module. La position axiale de cette tige est déterminée par une tirette 36 de construction classique maintenue en place par un ressort 37 qui est découpé d'une pièce avec un levier de bascule 36. Cette bascule 36 commande d'une part un pignon coulant 39 et d'autre part un interrupteur qui est constitué par un élément de contact mobile 40 situé à l'extrémité du doigt de la bascule et par une borne 41 constituée d'une lame métallique, par exemple une lame d'or découpée et pliée. La base de cette borne 41 est soudée sur la planche 24 à l'emplacement d'une piste conductrice connectée au circuit 23. La borne 41 comporte d'autre part un élément en forme de languette qui s'étend librement et dont l'extrémité se trouve en regard de l'élément de contact 40. La bascule 38 comporte une encoche 38a agencée de façon que lorsque la tige 35 est tirée dans une position intermédiaire (11), l'élément de contact 40 et le pignon coulant 39 sont déplacés vers l'extérieur du module et l'élément de contact 40 vient toucher la languette élastique de la borne 41. Cette borne est alors mise à la masse.The watch module shown in fig. 1 further comprises a control mechanism which can be operated by means of a crown 34 fixed to the end of a rod 35 disposed radially in the module. The axial position of this rod is determined by a pull tab 36 of conventional construction held in place by a spring 37 which is cut in one piece with a rocker lever 36. This rocker 36 controls on the one hand a sliding pinion 39 and d on the other hand a switch which is constituted by a movable contact element 40 situated at the end of the finger of the rocker and by a terminal 41 constituted by a metal blade, for example a gold blade cut and folded. The base of this terminal 41 is welded to the board 24 at the location of a conductive track connected to the circuit 23. The terminal 41 also has a tongue-shaped element which extends freely and the end of which is located opposite the contact element 40. The rocker 38 has a notch 38a arranged so that when the rod 35 is pulled into an intermediate position (11), the contact element 40 and the sliding pinion 39 are moved towards the outside of the module and the contact element 40 touches the elastic tongue of the terminal 41. This terminal is then earthed.

Lorsque la tige 35 est tirée dans sa position extérieure (III), le pignon coulant 39 est amené en contact avec un renvoi de mise à l'heure 42 qui est en prise avec la roue de minuterie 30. D'autre part, l'interruptuer 40/41 est à nouveau ouvert. Dans cette position, un autre interrupteur (non représenté) est alors fermé de sorte que la transmission des impulsions au moteur 25 est bloquée et ce moteur est à l'arrêt.When the rod 35 is pulled into its external position (III), the sliding pinion 39 is brought into contact with a time-setting reference 42 which is engaged with the timer wheel 30. On the other hand, the switch 40/41 is open again. In this position, another switch (not shown) is then closed so that the transmission of pulses to the motor 25 is blocked and this motor is stopped.

De préférence, la cellule 21 sera une cellule à cristal liquide, bien que d'autres systèmes électrooptiques puissent également être utilisés. Cette cellule est montée sur une planche 24 et ses bornes de connexion (non représentées) sont reliées au circuit 23 par des pistes conductrices.Preferably, cell 21 will be a liquid crystal cell, although other electro-optical systems may also be used. This cell is mounted on a board 24 and its connection terminals (not shown) are connected to the circuit 23 by conductive tracks.

Le mobile de 24 heures 33 qui est entraîné à une vitesse angulaire égale à la moitié de celle de la roue des heures est représenté plus en détail à la fig. 3. On voit qu'il comporte un disque métallique 43 chassé sur un arbre 44 suffisamment long pour traverser le cadran de la pièce d'horlogerie décrite et porter à son extrémité supérieure une aiguille de 24 heures (non représentée). Toutefois, en variante, ce mobile pourrait également comporter un arbre court sans organe indicateur. Sous le disque 43 est fixé une garniture 45 en matière plastique, de préférence en Delrin dont la périphérie comporte une gorge 45a. En un point de sa périphérie, cette gorge est trouée et la tige d'une goupille 46 chassée dans un trou du disque 43 fait légèrement saillie dans le fond de cette gorge. La planche de circuit imprimé 24 s'étend en dessous du mobile 33 et porte en regard de la gorge 45a une borne 47 également constituée d'une lamelle d'or pliée, de façon à former une languette à extrémité pliée en V et engagée dans la gorge 45a. Une fois par tour de la roue 33, la borne 47 sera donc mise à la masse au moment où la goupille 46 entre en contact avec son extrémité libre. On voit également à la fig. 3 le renvoi 32 ainsi que la roue des heures 31. Les deux roues 31 et 33 ont le même diamètre.The 24-hour mobile 33 which is driven at an angular speed equal to half that of the hour wheel is shown in more detail in FIG. 3. We see that it includes a metal disc 43 driven on a shaft 44 long enough to cross the dial of the timepiece described and carry at its upper end a 24-hour hand (not shown). However, as a variant, this mobile could also include a short shaft without an indicator member. Under the disc 43 is fixed a lining 45 made of plastic, preferably Delrin, the periphery of which includes a groove 45a. At one point of its periphery, this groove is perforated and the rod of a pin 46 driven into a hole in the disc 43 projects slightly into the bottom of this groove. The printed circuit board 24 extends below the mobile 33 and bears, opposite the groove 45a, a terminal 47 also consisting of a folded gold strip, so as to form a tongue with a V-folded end and engaged in throat 45a. Once per revolution of the wheel 33, the terminal 47 will therefore be earthed when the pin 46 comes into contact with its free end. We also see in fig. 3 the reference 32 and the hour wheel 31. The two wheels 31 and 33 have the same diameter.

Le fonctionnement de cette montre est le suivant un quartz 48 fixé sous la planche de circuit imprimé 24 pilote un diviseur de fréquence dont les impulsions de sortie commandent, à une fréquence stable, de 1 Hz par exemple, l'entraînement du moteur.The operation of this watch is as follows: a quartz 48 fixed under the printed circuit board 24 controls a frequency divider whose output pulses control, at a stable frequency, for example 1 Hz, the drive of the motor.

Le circuit 23 comporte en outre un compteur et un décodeur qui pilotent la cellule 21 à partir des impulsions que le compteur reçoit à chaque tour de la roue 33 quand l'élément de contact 46 est connecté à la borne 47. Le décodeur est agencé de façon à faire apparaître sur la cellule 21 successivement les chiffres de 1 à 31 Le saut de date étant commandé par le contact 46/47 il sera toujours synchronisé avec la position des aiguilles et se produira chaque fois à minuit.The circuit 23 further comprises a counter and a decoder which control the cell 21 from the pulses which the counter receives at each revolution of the wheel 33 when the contact element 46 is connected to the terminal 47. The decoder is arranged to so as to cause the digits 1 to 31 to appear successively on cell 21. The date jump being controlled by contact 46/47, it will always be synchronized with the position of the hands and will occur each time at midnight.

La correction du quantième s'effectue électroniquement lorsque la tige 34 est dans la position II. En effet, la fermeture du contact 41/40 commande dans le circuit électronique 23 l'emission d'impulsions, par exemple à une fréquence de 1 Hz mais ne commençant que deux secondes comptées à partir de la fermeture du contact et ces impulsions à une fréquence de 1 Hz sont transmises au décodeur de sorte que les chiffres des jours défilent sur la cellule 21 a la fréquence de 1 Hz. De même, si l'on effectue une mise a l'heure au moyen de la couronne 34, en faisant passer les aiguilles par la position de minuit, automatiquement une impulsion sera donnée au décodeur de date qui fera avancer la cellule d'une unité.The correction of the date takes place electronically when the rod 34 is in position II. Indeed, the closing of the contact 41/40 commands in the electronic circuit 23 the emission of pulses, for example at a frequency of 1 Hz but only beginning two seconds counted from the closing of the contact and these pulses at a frequency of 1 Hz are transmitted to the decoder so that the day numbers scroll on cell 21 at the frequency of 1 Hz. Similarly, if the time is set by means of the crown 34, making pass the hands through the midnight position, automatically a pulse will be given to the date decoder which will advance the cell by one.

Le comptage des impulsions fournies par le contact 46/47 sera agencé de façon qu'au moment où l'élément de contact 46 vient en contact avec la lame 47, une première impulsion est enregistrée et l'enregistrement d'autres impulsions est bloqué pendant tout le temps pendant lequel l'élément de contact glisse sous la lame 47. On évite ainsi les fausses impulsions qui pourraient résulter de rebonds de la lame 47 sur l'élément de contact 46. Les détails de l'agencement du circuit qui permet de ne capter que la première impulsion enregistrée, sont connus en soi et il n'est pas nécessaire de les décrire ici.The counting of the pulses supplied by the contact 46/47 will be arranged so that when the contact element 46 comes into contact with the blade 47, a first pulse is recorded and the recording of other pulses is blocked for all the time during which the contact element slides under the blade 47. This avoids false impulses which could result from rebounds of the blade 47 on the contact element 46. The details of the circuit arrangement which allow only receive the first recorded pulse, are known per se and it is not necessary to describe them here.

La lame de contact 47 appuie contre le mobile 33 non seulement pendant que la goupille 46 se trouve en regard de sa pointe, mais également pendant toute la durée de la rotation de ce mobile. Elle appuie en effet contre le fond de la gorge 45a et fait office de friction, ce qui élimine les jeux d'engrenage. La lame 47 sert donc à régulariser non seulement la rotation du mobile 33 qui déclenche le changement de date à minuit précis, mais également la rotation des autres mobiles indicatéurs, notamment la roue des heures 31 et la roue des minutes 29.The contact blade 47 presses against the mobile 33 not only while the pin 46 is facing its tip, but also throughout the duration of the rotation of this mobile. It indeed presses against the bottom of the groove 45a and acts as friction, which eliminates gear sets. The blade 47 therefore serves to regulate not only the rotation of the mobile 33 which triggers the date change at precise midnight, but also the rotation of the other indicator mobiles, in particular the hour wheel 31 and the minute wheel 29.

En variante, la roue des heures 31 pourrait être conformée comme le mobile 33 et porter une goupille se déplaçant dans le chemin d'une lame de contact telle que la lame de contact 47. Dans ce cas, le mobile 33 et le mobile 32 pourraient être supprimés. Il suffirait que le circuit électronique soit conformé de façon que le changement de date ne soit commandé qu'une fois sur deux sous l'effet des impulsions résultant de la fermeture du contact 46/47. Bien entendu on pourrait également supprimer le mobile intermédiaire 32 et conserver le mobile 33 tel que représenté à la fig. 3, en le disposant de façon que sa roue soit directement en prise avec la roue 31 des heures. Dans ce cas, le mobile 33 tournerait à la même vitesse que le mobile 31 et le circuit devrait être agencé de façon à ne commander le changement de date qu'une fois sur eux.As a variant, the hour wheel 31 could be shaped like the mobile 33 and carry a pin moving in the path of a contact blade such as the contact blade 47. In this case, the mobile 33 and the mobile 32 could be deleted. It would suffice that the electronic circuit is conformed so that the change of date is only ordered once in two under the effect of the pulses resulting from the closing of the contact 46/47. Of course one could also remove the intermediate mobile 32 and keep the mobile 33 as shown in FIG. 3, arranging it so that its wheel is directly engaged with the hour wheel 31. In this case, the mobile 33 would rotate at the same speed as the mobile 31 and the circuit should be arranged so as to control the date change only once on them.

La fig.3 représente une forme d'exécution dans laquelle les moyens d'affichage de la date sont différents de ceux qui sont prévus dans la forme d'exécution selon la fig.1, tout le reste des éléments du module étant par ailleurs les mêmes. Ces moyens d'affichage comportent un moteur 49 dont la construction peut être la même que celle du moteur 25, mais qui, comme on le verra tout à l'heure, pourrait fonctionner de façon légèrement différente. Le rotor 50 de ce moteur entraîne par son pignon un mobile de commutation de date 51, dont le doigt 51 a s'engage dans la denture 52a d'un anneau de quantième 52, qui peut être de construction usuelle. Cet anneau est disposé sous le cadran et porte sur sa surface supérieure les indications des quantièmes de 1 à 31. Sa denture est également à 31 dents et il est maintenu en place normalement au moyen d'un ressort sautoir 53. Un guichet, qui peut être situé par exemple sur trois heures, ou sur midi, permet de voir un des quantièmes porté par l'anneau 52.Fig.3 shows an embodiment in which the date display means are different from those provided in the embodiment according to fig.1, all the rest of the elements of the module being also the same. These display means comprise a motor 49, the construction of which may be the same as that of the motor 25, but which, as will be seen later, could operate slightly differently. The rotor 50 of this motor drives by its pinion a date switching mobile 51, the finger 51 of which engages in the toothing 52a of a date ring 52, which may be of usual construction. This ring is placed under the dial and carries on its upper surface the indications of the dates from 1 to 31. Its toothing is also 31 teeth and it is held in place normally by means of a jumper spring 53. A window, which can being located for example at three o'clock, or at noon, allows one to see one of the calendars carried by the ring 52.

A chaque fermeture du contact 46/47, le circuit électronique 23 commande l'envoi d'une suite d'impulsions prédéterminées sur le moteur 49. Ces impulsions peuvent se succéder à une fréquence relativement élevée et font tourner le rotor 50 de façon que le mobile 51 effectue un tour complet sur lui-même. Au cours de cette rotation, son doigt 51a a va s'engager dans la denture 52a et faire avancer l'anneau de quantième 52 d'un pas. Comme ce moteur ne fonctionne que durant un temps très court chaque jour, la fréquence de son fonctionnement peut être relativement élevée et son couple d'entraînement peut être faible, puisque l'entraînement est direct. En outre, comme le moteur 25 n'est jamais chargé par l'armage d'un mécanisme de calendrier, le couple de résistance qu'il doit vaincre à chaque impulsion pour entraîner le rouage est très faible et d'autre part parfaitement régulier. Ainsi, le couple de ce moteur et la durée de ses impulsions peuvent être ajustés à des valeurs minimales, ce qui contribue à économiser l'énergie de la pile 22.Each time the contact 46/47 is closed, the electronic circuit 23 commands a series of predetermined pulses to be sent to the motor 49. These pulses can follow one another at a relatively high frequency and cause the rotor 50 to rotate so that the mobile 51 performs a full turn on itself. During this rotation, his finger 51a a will engage in the toothing 52a and advance the date ring 52 by one step. As this motor only operates for a very short time each day, the frequency of its operation can be relatively high and its drive torque can be low, since the drive is direct. In addition, as the motor 25 is never loaded by the winding of a calendar mechanism, the resistance torque which it must overcome at each pulse to drive the train is very low and on the other hand perfectly regular. Thus, the torque of this motor and the duration of its pulses can be adjusted to minimum values, which contributes to saving the energy of the battery 22.

Dans ce cas également, la roue de 24 heures 33 est toujours synchronisée avec les heures et les minutes, même lors d'une correction de l'heure par le pignon coulant 9 et la couronne 34. C'est donc la roue de 24 heures qui commande et garantit le changement de date et non un circuit électronique dont la programmation reste complexe.In this case also, the 24-hour wheel 33 is always synchronized with the hours and minutes, even when the time is corrected by the sliding pinion 9 and the crown 34. It is therefore the 24-hour wheel which controls and guarantees the change of date and not an electronic circuit whose programming remains complex.

De plus, lors d'un changement de pile, aucune information n'est perdue.In addition, during a battery change, no information is lost.

Pour corriger le quantième, on procède comme dans la première forme d'exécution. La tige 34 est tirée un position 11 ce qui ferme le contact 40/41. Le circuit 23 commande alors le moteur 49 en continu, de sorte que les indications du quantième défilent dans le guichet.To correct the date, we proceed as in the first embodiment. The rod 34 is pulled into a position 11 which closes the contact 40/41. The circuit 23 then controls the motor 49 continuously, so that the date indications scroll through the window.

Bien entendu, le moteur 49 pourrait également entraîner un mécanisme de calendrier à quantième et jours de la semaine comportant une étoile des jours, de même que, dans la forme d'exéction décrite en relation avec la fig. 2, la cellule 21 pourrait aussi comporter un moven d'affichage du jour de la semaine.Of course, the motor 49 could also cause a calendar mechanism with calendar and days of the week comprising a day star, as well as, in the form of execution described in relation to FIG. 2, cell 21 could also include a moven for displaying the day of the week.

Aussi bien dans la forme d'exécution selon la fig.1 que dans celle selon la fig.3 on pourrait alors prévoir pour permettre la désynchronisation du comptage des jours par rapport au comptage des quantièmes, que lorsque la tige est dans la position Il, seuls les quantièmes sont corrigés, tandis que si l'on entraîne l'affichage au moyen de la couronne 34 en position III, les impulsions provoquées par fermeture du contact 46/47 commandent en même temps le saut du quantième et le saut du jour de la semaine.Both in the embodiment according to FIG. 1 and in that according to FIG. 3, provision could therefore be made to allow desynchronization of the counting of days relative to the counting of dates, as when the rod is in position II, only the dates are corrected, while if the display is driven by means of the crown 34 in position III, the pulses caused by closing of the contact 46/47 simultaneously control the jump of the date and the jump of the day of the week.

Claims (7)

1. Timepiece including an electronic time standard, and a time-display device with a stepping motor (25) and a gear train (27 to 33), certain elements of which constitute display parts, and, moreover, an electronic date-counting and -display means, characterized in that one of the elements of said gear train (33) which is the slowest element comprises a disc of insulating material (45) which has a circular sliding surface (45a) and a metal earthing contact element (46) partially sunk in said surface, and in that the electronic date-display means (23, 9; 23, 49-52) is connected to an elastic detector blade (47) held continuously in contact with said sliding surface, said blade acting, on the one hand, mechanically on said gear element as a brake for eliminating the gear backlash and, on the other hand, electronically on the date-display means for causing the displayed date indication to advance when it covers said contact element (46) and is then earthed.
2. Timepiece according to claim 1, characterized in that the said sliding surface (45a) is a cylindrical surface which forms the bottom of a groove contrived in the periphery of the insulating disc (45), and in that the contact element (46) is a cylindrical metal pin, the lateral surface of which extends flush with said sliding surface, this pin being integral with a circular metal plate (43) which supports the insulating disc and has a peripheral toothing meshing with another element (32) of the gear train.
3. Timepiece according to claim 1, further comprising a control mechanism having a control stem (35) movable translatingly in the direction of its axis and rotatingly about its axis, a sliding pinion, and an articulated connection between the stem and the sliding pinion, characterized in that the said articulated connection comprises a metal part (38) which bears an earthing contact element (40), and in that the date-display means (23, 9; 23,43-52) comprises another elastic contact blade (41) which, for an axial position of the stem, is put in contact with the said earthing element (40) and then controls a repeated advance of the date indication.
4. Timepiece according to any one of the claims 1 to 3, characterized in that the said electronic means (23, 9) comprises a circuit (23) for counting the pulses produced by the contact between the said earthing element (46) and the said detector blade (47) and an electronic decoding and date-indication display circuit (9).
5. Timepiece according to any one of the claims 1 to 3, characterized in that the said electronic means (23,49-52) comprises a stepping motor (49) moving one step at each pulse produced by the contact between the said earthing element (46) and the said detector blade (47), a motion-transmission mechanism (50,51), and a display part (52) driven rotatingly step by step at each of the said pulses and bearing date indications appearing one by one in an aperture.
6. Timepiece according to claim 1 or claim 2, characterized in that the said slowest element (33) of the gear train is connected to an hour wheel (31) by an intermediate moving part (32) so as to rotate at a speed of one revolution per 24 hours.
7. Timepiece according to claim 1 or claim 2, characterized in that the said slowest element (33) of the gear train is an hour wheel driven at a speed of one revolution per 12 hours and bearing an hour hand.
EP82903447A 1981-12-28 1982-12-03 Clock and watch module comprising an electronic circuit and a calender device Expired EP0097168B1 (en)

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CH831381A CH649189GA3 (en) 1981-12-28 1981-12-28
CH8313/81 1981-12-28

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EP82810556A Expired EP0083307B1 (en) 1981-12-28 1982-12-20 Electronic chronograph watch

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JP (2) JPS59500014A (en)
CH (1) CH649189GA3 (en)
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WO (1) WO1983002340A1 (en)

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Also Published As

Publication number Publication date
JPS59500014A (en) 1984-01-05
DE3276548D1 (en) 1987-07-16
US4540291A (en) 1985-09-10
EP0097168A1 (en) 1984-01-04
EP0083307A1 (en) 1983-07-06
CH649189GA3 (en) 1985-05-15
JPS58115394A (en) 1983-07-09
EP0083307B1 (en) 1987-06-10
WO1983002340A1 (en) 1983-07-07
US4588305A (en) 1986-05-13
DE3275766D1 (en) 1987-04-23

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